Mercurial > hg > xemacs-beta
annotate src/eval.c @ 4976:16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-04 Ben Wing <ben@xemacs.org>
* alloc.c (release_breathing_space):
* alloc.c (resize_string):
* alloc.c (sweep_lcrecords_1):
* alloc.c (SWEEP_FIXED_TYPE_BLOCK_1):
* alloc.c (ADDITIONAL_FREE_compiled_function):
* alloc.c (compact_string_chars):
* alloc.c (ADDITIONAL_FREE_string):
* alloc.c (sweep_strings):
* alloca.c (xemacs_c_alloca):
* alsaplay.c (alsa_play_sound_file):
* buffer.c (init_initial_directory):
* buffer.h:
* buffer.h (BUFFER_FREE):
* console-stream.c (stream_delete_console):
* console-tty.c (free_tty_console_struct):
* data.c (Fnumber_to_string):
* device-gtk.c (gtk_init_device):
* device-gtk.c (free_gtk_device_struct):
* device-gtk.c (gtk_delete_device):
* device-msw.c (mswindows_delete_device):
* device-msw.c (msprinter_delete_device):
* device-tty.c (free_tty_device_struct):
* device-tty.c (tty_delete_device):
* device-x.c (x_init_device):
* device-x.c (free_x_device_struct):
* device-x.c (x_delete_device):
* dialog-msw.c (handle_directory_dialog_box):
* dialog-x.c (dbox_descriptor_to_widget_value):
* dired-msw.c (Fmswindows_insert_directory):
* dired.c (free_user_cache):
* dired.c (user_name_completion_unwind):
* doc.c (unparesseuxify_doc_string):
* doc.c (Fsubstitute_command_keys):
* doprnt.c (emacs_doprnt_1):
* dumper.c (pdump_load_finish):
* dumper.c (pdump_file_free):
* dumper.c (pdump_file_unmap):
* dynarr.c:
* dynarr.c (Dynarr_free):
* editfns.c (uncache_home_directory):
* editfns.c (Fset_time_zone_rule):
* elhash.c:
* elhash.c (pdump_reorganize_hash_table):
* elhash.c (maphash_unwind):
* emacs.c (make_arg_list_1):
* emacs.c (free_argc_argv):
* emacs.c (sort_args):
* emacs.c (Frunning_temacs_p):
* emodules.c (attempt_module_delete):
* eval.c (free_pointer):
* event-Xt.c (unselect_filedesc):
* event-Xt.c (emacs_Xt_select_process):
* event-gtk.c (unselect_filedesc):
* event-gtk.c (dragndrop_data_received):
* event-msw.c (winsock_closer):
* event-msw.c (mswindows_dde_callback):
* event-msw.c (mswindows_wnd_proc):
* event-stream.c (finalize_command_builder):
* event-stream.c (free_command_builder):
* extents.c (free_gap_array):
* extents.c (free_extent_list):
* extents.c (free_soe):
* extents.c (extent_fragment_delete):
* extents.c (extent_priority_sort_function):
* file-coding.c (make_coding_system_1):
* file-coding.c (coding_finalizer):
* file-coding.c (set_coding_stream_coding_system):
* file-coding.c (chain_finalize_coding_stream_1):
* file-coding.c (chain_finalize):
* file-coding.c (free_detection_state):
* file-coding.c (coding_category_symbol_to_id):
* fileio.c:
* fileio.c (Ffile_name_directory):
* fileio.c (if):
* fileio.c (Ffile_symlink_p):
* filelock.c (FREE_LOCK_INFO):
* filelock.c (current_lock_owner):
* font-mgr.c (Ffc_name_unparse):
* font-mgr.c (Ffc_pattern_duplicate):
* frame-gtk.c (gtk_delete_frame):
* frame-msw.c (mswindows_delete_frame):
* frame-msw.c (msprinter_delete_frame):
* frame-x.c (x_cde_destroy_callback):
* frame-x.c (Fcde_start_drag_internal):
* frame-x.c (x_cde_transfer_callback):
* frame-x.c (x_delete_frame):
* frame.c (update_frame_title):
* frame.c (Fset_frame_pointer):
* gc.c (register_for_finalization):
* gccache-gtk.c (free_gc_cache):
* gccache-gtk.c (gc_cache_lookup):
* gccache-x.c (free_gc_cache):
* gccache-x.c (gc_cache_lookup):
* glyphs-eimage.c:
* glyphs-eimage.c (jpeg_instantiate_unwind):
* glyphs-eimage.c (gif_instantiate_unwind):
* glyphs-eimage.c (png_instantiate_unwind):
* glyphs-eimage.c (png_instantiate):
* glyphs-eimage.c (tiff_instantiate_unwind):
* glyphs-gtk.c (convert_EImage_to_GDKImage):
* glyphs-gtk.c (gtk_finalize_image_instance):
* glyphs-gtk.c (gtk_init_image_instance_from_eimage):
* glyphs-gtk.c (gtk_xpm_instantiate):
* glyphs-msw.c (convert_EImage_to_DIBitmap):
* glyphs-msw.c (mswindows_init_image_instance_from_eimage):
* glyphs-msw.c (mswindows_initialize_image_instance_mask):
* glyphs-msw.c (xpm_to_eimage):
* glyphs-msw.c (mswindows_xpm_instantiate):
* glyphs-msw.c (xbm_create_bitmap_from_data):
* glyphs-msw.c (mswindows_finalize_image_instance):
* glyphs-x.c (convert_EImage_to_XImage):
* glyphs-x.c (x_finalize_image_instance):
* glyphs-x.c (x_init_image_instance_from_eimage):
* glyphs-x.c (x_xpm_instantiate):
* gui-x.c (free_popup_widget_value_tree):
* hash.c (free_hash_table):
* hash.c (grow_hash_table):
* hash.c (pregrow_hash_table_if_necessary):
* imgproc.c (build_EImage_quantable):
* insdel.c (uninit_buffer_text):
* intl-win32.c (convert_multibyte_to_internal_malloc):
* intl.c:
* intl.c (Fset_current_locale):
* keymap.c:
* keymap.c (where_is_recursive_mapper):
* keymap.c (where_is_internal):
* lisp.h:
* lisp.h (xfree):
* lstream.c (Lstream_close):
* lstream.c (resizing_buffer_closer):
* mule-coding.c:
* mule-coding.c (iso2022_finalize_detection_state):
* nt.c:
* nt.c (mswindows_get_long_filename):
* nt.c (nt_get_resource):
* nt.c (init_mswindows_environment):
* nt.c (get_cached_volume_information):
* nt.c (mswindows_opendir):
* nt.c (mswindows_closedir):
* nt.c (mswindows_readdir):
* nt.c (mswindows_stat):
* nt.c (mswindows_getdcwd):
* nt.c (Fmswindows_long_file_name):
* ntplay.c (nt_play_sound_file):
* ntplay.c (play_sound_data_1):
* number-gmp.c (gmp_free):
* number-gmp.c (init_number_gmp):
* number-mp.c (bignum_to_string):
* number-mp.c (BIGNUM_TO_TYPE):
* number.c (bignum_print):
* number.c (bignum_convfree):
* number.c (ratio_print):
* number.c (bigfloat_print):
* number.c (bigfloat_finalize):
* objects-gtk.c (gtk_finalize_color_instance):
* objects-gtk.c (gtk_finalize_font_instance):
* objects-msw.c (mswindows_finalize_color_instance):
* objects-msw.c (mswindows_finalize_font_instance):
* objects-tty.c (tty_finalize_color_instance):
* objects-tty.c (tty_finalize_font_instance):
* objects-tty.c (tty_font_list):
* objects-x.c (x_finalize_color_instance):
* objects-x.c (x_finalize_font_instance):
* process.c:
* process.c (finalize_process):
* realpath.c:
* redisplay.c (add_propagation_runes):
* regex.c:
* regex.c (xfree):
* regex.c (REGEX_FREE_STACK):
* regex.c (FREE_STACK_RETURN):
* regex.c (regex_compile):
* regex.c (regexec):
* regex.c (regfree):
* scrollbar-gtk.c (gtk_free_scrollbar_instance):
* scrollbar-gtk.c (gtk_release_scrollbar_instance):
* scrollbar-msw.c (mswindows_free_scrollbar_instance):
* scrollbar-msw.c (unshow_that_mofo):
* scrollbar-x.c (x_free_scrollbar_instance):
* scrollbar-x.c (x_release_scrollbar_instance):
* select-gtk.c (emacs_gtk_selection_handle):
* select-msw.c (mswindows_own_selection):
* select-x.c:
* select-x.c (x_handle_selection_request):
* select-x.c (unexpect_property_change):
* select-x.c (x_handle_property_notify):
* select-x.c (receive_incremental_selection):
* select-x.c (x_get_window_property_as_lisp_data):
* select-x.c (Fx_get_cutbuffer_internal):
* specifier.c (finalize_specifier):
* syntax.c (uninit_buffer_syntax_cache):
* sysdep.c (qxe_allocating_getcwd):
* sysdep.c (qxe_lstat):
* sysdep.c (copy_in_passwd):
* sysdep.c (qxe_ctime):
* sysdep.c (closedir):
* sysdep.c (DIRSIZ):
* termcap.c (tgetent):
* termcap.c (tprint):
* tests.c (Ftest_data_format_conversion):
* text.c (new_dfc_convert_copy_data):
* text.h (eifree):
* text.h (eito_alloca):
* text.h (eito_external):
* toolbar-msw.c (mswindows_output_toolbar):
* ui-gtk.c (CONVERT_RETVAL):
* ui-gtk.c (__allocate_object_storage):
* unicode.c (free_from_unicode_table):
* unicode.c (free_to_unicode_table):
* unicode.c (free_charset_unicode_tables):
* win32.c (mswindows_read_link_1):
Rename: xfree(VAL, TYPE)->xfree(VAL)
Command used:
gr 'xfree *\((.*),.*\);' 'xfree (\1);' *.[ch]
Followed by grepping for 'xfree.*,' and fixing anything left.
Rationale: Having to specify the TYPE argument is annoying and
error-prone. It was originally put in to work around warnings
due to strict aliasing but years and years ago I rewrote it
in a way that doesn't use the TYPE argument at all and no one
has complained since then. (And anyway, XEmacs is far from
ever being in compliance with strict aliasing and would require
far-reaching changes to get that way.)
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Thu, 04 Feb 2010 07:28:14 -0600 |
| parents | cbe181529c34 |
| children | 3c3c1d139863 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 2421 | 4 Copyright (C) 2000, 2001, 2002, 2003, 2004 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 24 | |
| 853 | 25 /* Authorship: |
| 26 | |
| 27 Based on code from pre-release FSF 19, c. 1991. | |
| 28 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 29 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 30 for lemacs 19.8. some signal changes. | |
| 31 Various work by Ben Wing, 1995-1996: | |
| 32 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 33 added most Fsignal front ends. | |
| 34 added warning code. | |
| 35 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 36 Some changes by Martin Buchholz c. 1999? | |
| 37 e.g. PRIMITIVE_FUNCALL macros. | |
| 38 New call_trapping_problems code and large comments below | |
| 39 by Ben Wing, Mar-Apr 2000. | |
| 40 */ | |
| 41 | |
| 42 /* This file has been Mule-ized. */ | |
| 43 | |
| 44 /* What is in this file? | |
| 45 | |
| 46 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 47 The engine does the actual work of implementing function calls, | |
| 48 form evaluation, non-local exits (catch, throw, signal, | |
| 49 condition-case, call-with-condition-handler), unwind-protects, | |
| 50 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 51 that this module is the very heart of XEmacs, and everything else | |
| 52 in XEmacs is merely an auxiliary module implementing some specific | |
| 53 functionality that may be called from the heart at an appropriate | |
| 54 time. | |
| 55 | |
| 56 The only exception is the alloc.c module, which implements the | |
| 57 framework upon which this module (eval.c) works. alloc.c works | |
| 58 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 59 collecting them as necessary, presenting a nice, high-level |
| 853 | 60 interface for object creation, deletion, access, and modification. |
| 61 | |
| 62 The only other exception that could be cited is the event-handling | |
| 63 module in event-stream.c. From its perspective, it is also the | |
| 64 heart of XEmacs, and controls exactly what gets done at what time. | |
| 65 From its perspective, eval.c is merely one of the auxiliary modules | |
| 66 out there that can be invoked by event-stream.c. | |
| 67 | |
| 68 Although the event-stream-centric view is a convenient fiction that | |
| 69 makes sense particularly from the user's perspective and from the | |
| 70 perspective of time, the engine-centric view is actually closest to | |
| 71 the truth, because anywhere within the event-stream module, you are | |
| 72 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 73 functions such as `command-loop-1', a Lisp function. | |
| 74 | |
| 75 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 76 the engine primarily in five list-like items, which are: |
| 853 | 77 |
| 78 -- the backtrace list | |
| 79 -- the catchtag list | |
| 80 -- the condition-handler list | |
| 81 -- the specbind list | |
| 82 -- the GCPRO list. | |
| 83 | |
| 84 These are described in detail in the next comment. | |
| 85 | |
| 86 --ben | |
| 87 */ | |
| 88 | |
| 89 /* Note that there are five separate lists used to maintain state in | |
| 90 the evaluator. All of them conceptually are stacks (last-in, | |
| 91 first-out). All non-local exits happen ultimately through the | |
| 92 catch/throw mechanism, which uses one of the five lists (the | |
| 93 catchtag list) and records the current state of the others in each | |
| 94 frame of the list (some other information is recorded and restored | |
| 95 as well, such as the current eval depth), so that all the state of | |
| 96 the evaluator is restored properly when a non-local exit occurs. | |
| 97 (Note that the current state of the condition-handler list is not | |
| 98 recorded in the catchtag list. Instead, when a condition-case or | |
| 99 call-with-condition-handler is set up, it installs an | |
| 100 unwind-protect on the specbind list to restore the appropriate | |
| 101 setting for the condition-handler list. During the course of | |
| 102 handling the non-local exit, all entries on the specbind list that | |
| 103 are past the location stored in the catch frame are "unwound" | |
| 104 (i.e. variable bindings are restored and unwind-protects are | |
| 105 executed), so the condition-handler list gets reset properly. | |
| 106 | |
| 107 The five lists are | |
| 108 | |
| 109 1. The backtrace list, which is chained through `struct backtrace's | |
| 110 declared in the stack frames of various primitives, and keeps | |
| 111 track of all Lisp function call entries and exits. | |
| 112 2. The catchtag list, which is chained through `struct catchtag's | |
| 113 declared in the stack frames of internal_catch and condition_case_1, | |
| 114 and keeps track of information needed to reset the internal state | |
| 115 of the evaluator to the state that was current when the catch or | |
| 116 condition-case were established, in the event of a non-local exit. | |
| 117 3. The condition-handler list, which is a simple Lisp list with new | |
| 118 entries consed onto the front of the list. It records condition-cases | |
| 119 and call-with-condition-handlers established either from C or from | |
| 120 Lisp. Unlike with the other lists (but similar to everything else | |
| 121 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 122 of restoring itself appropriately in the event of a non-local exit | |
| 123 through the use of the unwind-protect mechanism. | |
| 124 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 125 expanded as necessary using realloc(). It holds dynamic variable | |
| 126 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 127 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 128 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 129 declared on the stack. This is one of the most fragile areas of the | |
| 130 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 131 function, you must make sure you GCPRO in many circumstances you don't | |
| 132 think you have to, etc. See the internals manual for more information | |
| 133 about this. | |
| 134 | |
| 135 --ben | |
| 136 */ | |
| 137 | |
| 428 | 138 #include <config.h> |
| 139 #include "lisp.h" | |
| 140 | |
| 141 #include "commands.h" | |
| 142 #include "backtrace.h" | |
| 143 #include "bytecode.h" | |
| 144 #include "buffer.h" | |
| 872 | 145 #include "console-impl.h" |
| 853 | 146 #include "device.h" |
| 147 #include "frame.h" | |
| 148 #include "lstream.h" | |
| 428 | 149 #include "opaque.h" |
| 1292 | 150 #include "profile.h" |
| 853 | 151 #include "window.h" |
| 428 | 152 |
| 153 struct backtrace *backtrace_list; | |
| 154 | |
| 155 /* Macros for calling subrs with an argument list whose length is only | |
| 156 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 157 | |
| 158 #define AV_0(av) | |
| 159 #define AV_1(av) av[0] | |
| 160 #define AV_2(av) AV_1(av), av[1] | |
| 161 #define AV_3(av) AV_2(av), av[2] | |
| 162 #define AV_4(av) AV_3(av), av[3] | |
| 163 #define AV_5(av) AV_4(av), av[4] | |
| 164 #define AV_6(av) AV_5(av), av[5] | |
| 165 #define AV_7(av) AV_6(av), av[6] | |
| 166 #define AV_8(av) AV_7(av), av[7] | |
| 167 | |
| 168 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 169 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 170 |
| 171 /* If subrs take more than 8 arguments, more cases need to be added | |
| 172 to this switch. (But wait - don't do it - if you really need | |
| 173 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 174 Or better, considering using a property list as one of your args. |
| 428 | 175 See the DEFUN macro in lisp.h) */ |
| 176 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 177 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 178 Lisp_Object *PF_av = (av); \ | |
| 179 switch (ac) \ | |
| 180 { \ | |
| 436 | 181 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 182 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 183 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 184 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 185 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 186 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 187 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 188 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 189 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 190 } \ | |
| 191 } while (0) | |
| 192 | |
| 193 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 194 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 195 | |
| 196 | |
| 197 /* This is the list of current catches (and also condition-cases). | |
| 853 | 198 This is a stack: the most recent catch is at the head of the list. |
| 199 The list is threaded through the stack frames of the C functions | |
| 200 that set up the catches; this is similar to the way the GCPRO list | |
| 201 is handled, but different from the condition-handler list (which is | |
| 202 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 203 array of `struct specbinding's, grown (using realloc()) as | |
| 204 necessary. (Note that all four of these lists behave as a stacks.) | |
| 205 | |
| 3025 | 206 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 207 filling the .TAG field in with the tag, and doing a setjmp() on |
| 208 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 209 longjmp() back to .JMP, back to the function that established the | |
| 210 catch. This will always be either internal_catch() (catches | |
| 211 established internally or through `catch') or condition_case_1 | |
| 212 (condition-cases established internally or through | |
| 213 `condition-case'). | |
| 428 | 214 |
| 215 The catchtag also records the current position in the | |
| 216 call stack (stored in BACKTRACE_LIST), the current position | |
| 217 in the specpdl stack (used for variable bindings and | |
| 218 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 219 current position in the GCPRO stack. All of these are | |
| 220 restored by Fthrow(). | |
| 853 | 221 */ |
| 428 | 222 |
| 223 struct catchtag *catchlist; | |
| 224 | |
| 853 | 225 /* A special tag that can be used internally from C code to catch |
| 226 every attempt to throw past this level. */ | |
| 227 Lisp_Object Vcatch_everything_tag; | |
| 228 | |
| 428 | 229 Lisp_Object Qautoload, Qmacro, Qexit; |
| 230 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; | |
| 231 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 232 Lisp_Object Qand_rest, Qand_optional; | |
| 233 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 234 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 235 Lisp_Object Qdebugger; | |
| 236 Lisp_Object Qinhibit_quit; | |
| 887 | 237 Lisp_Object Qfinalize_list; |
| 428 | 238 Lisp_Object Qrun_hooks; |
| 239 Lisp_Object Qsetq; | |
| 240 Lisp_Object Qdisplay_warning; | |
| 241 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 242 Lisp_Object Qif; | |
| 243 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
244 Lisp_Object Qthrow; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
245 Lisp_Object Qobsolete_throw; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
246 Lisp_Object Qmultiple_value_list_internal; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
247 |
|
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Support full Common Lisp multiple values in C.
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248 static int first_desired_multiple_value; |
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249 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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250 macro: */ |
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251 int multiple_value_current_limit; |
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252 |
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253 Fixnum Vmultiple_values_limit; |
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254 |
| 853 | 255 /* Flags specifying which operations are currently inhibited. */ |
| 256 int inhibit_flags; | |
| 257 | |
| 258 /* Buffers, frames, windows, devices, and consoles created since most | |
| 259 recent active | |
| 260 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 261 */ | |
| 262 Lisp_Object Vdeletable_permanent_display_objects; | |
| 263 | |
| 264 /* Buffers created since most recent active | |
| 265 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 266 Lisp_Object Vmodifiable_buffers; | |
| 793 | 267 |
| 268 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 269 entirely -- not even generated. */ | |
| 270 Lisp_Object Vlog_warning_minimum_level; | |
| 271 | |
| 428 | 272 /* Non-nil means record all fset's and provide's, to be undone |
| 273 if the file being autoloaded is not fully loaded. | |
| 274 They are recorded by being consed onto the front of Vautoload_queue: | |
| 275 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 276 Lisp_Object Vautoload_queue; | |
| 277 | |
| 278 /* Current number of specbindings allocated in specpdl. */ | |
| 279 int specpdl_size; | |
| 280 | |
| 281 /* Pointer to beginning of specpdl. */ | |
| 282 struct specbinding *specpdl; | |
| 283 | |
| 284 /* Pointer to first unused element in specpdl. */ | |
| 285 struct specbinding *specpdl_ptr; | |
| 286 | |
| 287 /* specpdl_ptr - specpdl */ | |
| 288 int specpdl_depth_counter; | |
| 289 | |
| 290 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 291 Fixnum max_specpdl_size; |
| 428 | 292 |
| 293 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 294 int lisp_eval_depth; |
| 428 | 295 |
| 296 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 297 Fixnum max_lisp_eval_depth; |
| 428 | 298 |
| 299 /* Nonzero means enter debugger before next function call */ | |
| 300 static int debug_on_next_call; | |
| 301 | |
| 1292 | 302 int backtrace_with_internal_sections; |
| 303 | |
| 428 | 304 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 305 if an error is handled by the command loop's error handler. */ | |
| 306 Lisp_Object Vstack_trace_on_error; | |
| 307 | |
| 308 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 309 if an error is handled by the command loop's error handler. */ | |
| 310 Lisp_Object Vdebug_on_error; | |
| 311 | |
| 312 /* List of conditions and regexps specifying error messages which | |
| 313 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 314 Lisp_Object Vdebug_ignored_errors; | |
| 315 | |
| 316 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 317 if any error is signalled. */ | |
| 318 Lisp_Object Vstack_trace_on_signal; | |
| 319 | |
| 320 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 321 if any error is signalled. */ | |
| 322 Lisp_Object Vdebug_on_signal; | |
| 323 | |
| 324 /* Nonzero means enter debugger if a quit signal | |
| 325 is handled by the command loop's error handler. | |
| 326 | |
| 327 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 328 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 329 that a critical_quit is in progress. The second bit is reset immediately | |
| 330 after it is processed in signal_call_debugger(). */ | |
| 331 int debug_on_quit; | |
| 332 | |
| 333 #if 0 /* FSFmacs */ | |
| 334 /* entering_debugger is basically equivalent */ | |
| 335 /* The value of num_nonmacro_input_chars as of the last time we | |
| 336 started to enter the debugger. If we decide to enter the debugger | |
| 337 again when this is still equal to num_nonmacro_input_chars, then we | |
| 338 know that the debugger itself has an error, and we should just | |
| 339 signal the error instead of entering an infinite loop of debugger | |
| 340 invocations. */ | |
| 341 int when_entered_debugger; | |
| 342 #endif | |
| 343 | |
| 344 /* Nonzero means we are trying to enter the debugger. | |
| 345 This is to prevent recursive attempts. | |
| 346 Cleared by the debugger calling Fbacktrace */ | |
| 347 static int entering_debugger; | |
| 348 | |
| 349 /* Function to call to invoke the debugger */ | |
| 350 Lisp_Object Vdebugger; | |
| 351 | |
| 853 | 352 /* List of condition handlers currently in effect. |
| 353 The elements of this lists were at one point in the past | |
| 354 threaded through the stack frames of Fcondition_case and | |
| 355 related functions, but now are stored separately in a normal | |
| 356 stack. When an error is signaled (by calling Fsignal, below), | |
| 357 this list is searched for an element that applies. | |
| 428 | 358 |
| 359 Each element of this list is one of the following: | |
| 360 | |
| 853 | 361 -- A list of a handler function and possibly args to pass to the |
| 362 function. This is a handler established with the Lisp primitive | |
| 363 `call-with-condition-handler' or related C function | |
| 364 call_with_condition_handler(): | |
| 365 | |
| 366 If the handler function is an opaque ptr object, it is a handler | |
| 367 that was established in C using call_with_condition_handler(), | |
| 368 and the contents of the object are a function pointer which takes | |
| 369 three arguments, the signal name and signal data (same arguments | |
| 370 passed to `signal') and a third Lisp_Object argument, specified | |
| 371 in the call to call_with_condition_handler() and stored as the | |
| 372 second element of the list containing the handler functionl. | |
| 373 | |
| 374 If the handler function is a regular Lisp_Object, it is a handler | |
| 375 that was established using `call-with-condition-handler'. | |
| 376 Currently there are no more arguments in the list containing the | |
| 377 handler function, and only one argument is passed to the handler | |
| 378 function: a cons of the signal name and signal data arguments | |
| 379 passed to `signal'. | |
| 380 | |
| 381 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 382 special condition-case handler established by C code with | |
| 383 condition_case_1(). All errors are trapped; the debugger is not | |
| 384 invoked even if `debug-on-error' was set. | |
| 385 | |
| 386 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 387 special condition-case handler established by C code with | |
| 388 condition_case_1(). It is like Qt except that the debugger is | |
| 389 invoked normally if it is called for. | |
| 390 | |
| 391 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 392 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 393 a normal `condition-case' handler. | |
| 394 | |
| 395 Note that in all cases *except* the first, there is a corresponding | |
| 396 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 397 handler data just described is pushed onto it. The reason is that | |
| 398 `condition-case' handlers need to throw back to the place where the | |
| 399 handler was installed before invoking it, while | |
| 400 `call-with-condition-handler' handlers are invoked in the | |
| 401 environment that `signal' was invoked in. */ | |
| 402 | |
| 403 | |
| 428 | 404 static Lisp_Object Vcondition_handlers; |
| 405 | |
| 853 | 406 /* I think we should keep this enabled all the time, not just when |
| 407 error checking is enabled, because if one of these puppies pops up, | |
| 408 it will trash the stack if not caught, making it that much harder to | |
| 409 debug. It doesn't cause speed loss. */ | |
| 442 | 410 #define DEFEND_AGAINST_THROW_RECURSION |
| 411 | |
| 412 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 413 /* Used for error catching purposes by throw_or_bomb_out */ |
| 414 static int throw_level; | |
| 442 | 415 #endif |
| 416 | |
| 1123 | 417 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 418 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 419 |
| 428 | 420 |
| 421 /************************************************************************/ | |
| 422 /* The subr object type */ | |
| 423 /************************************************************************/ | |
| 424 | |
| 425 static void | |
| 2286 | 426 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 427 { |
| 428 Lisp_Subr *subr = XSUBR (obj); | |
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429 const Ascbyte *header = |
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430 (subr->max_args == UNEVALLED) ? "#<special-operator " : "#<subr "; |
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431 const Ascbyte *name = subr_name (subr); |
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432 const Ascbyte *trailer = subr->prompt ? " (interactive)>" : ">"; |
| 428 | 433 |
| 434 if (print_readably) | |
| 563 | 435 printing_unreadable_object ("%s%s%s", header, name, trailer); |
| 428 | 436 |
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437 write_ascstring (printcharfun, header); |
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438 write_ascstring (printcharfun, name); |
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439 write_ascstring (printcharfun, trailer); |
| 428 | 440 } |
| 441 | |
| 1204 | 442 static const struct memory_description subr_description[] = { |
| 2551 | 443 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 444 { XD_END } |
| 445 }; | |
| 446 | |
| 938 | 447 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr, |
| 448 1, /*dumpable-flag*/ | |
| 449 0, print_subr, 0, 0, 0, | |
| 450 subr_description, | |
| 451 Lisp_Subr); | |
| 428 | 452 |
| 453 /************************************************************************/ | |
| 454 /* Entering the debugger */ | |
| 455 /************************************************************************/ | |
| 456 | |
| 853 | 457 static Lisp_Object |
| 458 current_warning_level (void) | |
| 459 { | |
| 460 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 461 return Qdebug; | |
| 462 else | |
| 463 return Qwarning; | |
| 464 } | |
| 465 | |
| 428 | 466 /* Actually call the debugger. ARG is a list of args that will be |
| 467 passed to the debugger function, as follows; | |
| 468 | |
| 469 If due to frame exit, args are `exit' and the value being returned; | |
| 470 this function's value will be returned instead of that. | |
| 471 If due to error, args are `error' and a list of the args to `signal'. | |
| 472 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 473 If due to `eval' entry, one arg, t. | |
| 474 | |
| 475 */ | |
| 476 | |
| 477 static Lisp_Object | |
| 478 call_debugger_259 (Lisp_Object arg) | |
| 479 { | |
| 480 return apply1 (Vdebugger, arg); | |
| 481 } | |
| 482 | |
| 483 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 484 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 485 to 1 during this call. This is used to trap errors that may occur | |
| 486 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 487 so that the debugger will not be recursively entered if debug-on-error | |
| 488 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 489 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 490 as a backtrace is displayed, so that further errors can indeed be | |
| 491 handled normally. | |
| 492 | |
| 3025 | 493 We also establish a catch for `debugger'. If the debugger function |
| 428 | 494 throws to this instead of returning a value, it means that the user |
| 495 pressed 'c' (pretend like the debugger was never entered). The | |
| 496 function then returns Qunbound. (If the user pressed 'r', for | |
| 497 return a value, then the debugger function returns normally with | |
| 498 this value.) | |
| 499 | |
| 500 The difference between 'c' and 'r' is as follows: | |
| 501 | |
| 502 debug-on-call: | |
| 503 No difference. The call proceeds as normal. | |
| 504 debug-on-exit: | |
| 505 With 'r', the specified value is returned as the function's | |
| 506 return value. With 'c', the value that would normally be | |
| 507 returned is returned. | |
| 508 signal: | |
| 509 With 'r', the specified value is returned as the return | |
| 510 value of `signal'. (This is the only time that `signal' | |
| 511 can return, instead of making a non-local exit.) With `c', | |
| 512 `signal' will continue looking for handlers as if the | |
| 513 debugger was never entered, and will probably end up | |
| 514 throwing to a handler or to top-level. | |
| 515 */ | |
| 516 | |
| 517 static Lisp_Object | |
| 518 call_debugger (Lisp_Object arg) | |
| 519 { | |
| 520 int threw; | |
| 521 Lisp_Object val; | |
| 522 int speccount; | |
| 523 | |
| 853 | 524 debug_on_next_call = 0; |
| 525 | |
| 526 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 527 { | |
| 528 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 529 warn_when_safe | |
| 530 (Qdebugger, current_warning_level (), | |
| 531 "Unable to enter debugger within critical section"); | |
| 532 return Qunbound; | |
| 533 } | |
| 534 | |
| 428 | 535 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 536 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 537 if (specpdl_size + 40 > max_specpdl_size) | |
| 538 max_specpdl_size = specpdl_size + 40; | |
| 853 | 539 |
| 540 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 541 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 542 |
| 771 | 543 return unbind_to_1 (speccount, ((threw) |
| 428 | 544 ? Qunbound /* Not returning a value */ |
| 545 : val)); | |
| 546 } | |
| 547 | |
| 548 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 549 with the appropriate args for this. VAL is the exit value that is | |
| 550 about to be returned. */ | |
| 551 | |
| 552 static Lisp_Object | |
| 553 do_debug_on_exit (Lisp_Object val) | |
| 554 { | |
| 555 /* This is falsified by call_debugger */ | |
| 556 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 557 | |
| 558 return !UNBOUNDP (v) ? v : val; | |
| 559 } | |
| 560 | |
| 561 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 562 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 563 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 564 |
| 565 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 566 FUNCALL can be defined as | |
| 567 | |
| 568 (defmacro func (fun &rest args) | |
| 569 (cons (eval fun) args)) | |
| 570 | |
| 571 and should be treated as such. | |
| 572 */ | |
| 573 | |
| 574 static void | |
| 575 do_debug_on_call (Lisp_Object code) | |
| 576 { | |
| 577 debug_on_next_call = 0; | |
| 578 backtrace_list->debug_on_exit = 1; | |
| 579 call_debugger (list1 (code)); | |
| 580 } | |
| 581 | |
| 582 /* LIST is the value of one of the variables `debug-on-error', | |
| 583 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 584 and CONDITIONS is the list of error conditions associated with | |
| 585 the error being signalled. This returns non-nil if LIST | |
| 586 matches CONDITIONS. (A nil value for LIST does not match | |
| 587 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 588 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 589 same as one of the symbols in CONDITIONS.) */ | |
| 590 | |
| 591 static int | |
| 592 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 593 { | |
| 594 if (NILP (list)) | |
| 595 return 0; | |
| 596 if (! CONSP (list)) | |
| 597 return 1; | |
| 598 | |
| 599 while (CONSP (conditions)) | |
| 600 { | |
| 2552 | 601 Lisp_Object curr, tail; |
| 602 curr = XCAR (conditions); | |
| 428 | 603 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 604 if (EQ (XCAR (tail), curr)) |
| 428 | 605 return 1; |
| 606 conditions = XCDR (conditions); | |
| 607 } | |
| 608 return 0; | |
| 609 } | |
| 610 | |
| 611 | |
| 612 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 613 and described by SIGNAL-DATA, should skip the debugger | |
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614 according to debug-ignored-errors. */ |
| 428 | 615 |
| 616 static int | |
| 617 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 618 { | |
| 619 /* This function can GC */ | |
| 620 Lisp_Object tail; | |
| 621 int first_string = 1; | |
| 622 Lisp_Object error_message = Qnil; | |
| 623 | |
| 624 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 625 { | |
| 626 if (STRINGP (XCAR (tail))) | |
| 627 { | |
| 628 if (first_string) | |
| 629 { | |
| 630 error_message = Ferror_message_string (data); | |
| 631 first_string = 0; | |
| 632 } | |
| 633 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 634 return 1; | |
| 635 } | |
| 636 else | |
| 637 { | |
| 638 Lisp_Object contail; | |
| 639 | |
| 640 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 641 if (EQ (XCAR (tail), XCAR (contail))) | |
| 642 return 1; | |
| 643 } | |
| 644 } | |
| 645 | |
| 646 return 0; | |
| 647 } | |
| 648 | |
| 649 /* Actually generate a backtrace on STREAM. */ | |
| 650 | |
| 651 static Lisp_Object | |
| 652 backtrace_259 (Lisp_Object stream) | |
| 653 { | |
| 654 return Fbacktrace (stream, Qt); | |
| 655 } | |
| 656 | |
| 1130 | 657 #ifdef DEBUG_XEMACS |
| 658 | |
| 659 static void | |
| 660 trace_out_and_die (Lisp_Object err) | |
| 661 { | |
| 662 Fdisplay_error (err, Qt); | |
| 663 backtrace_259 (Qnil); | |
| 664 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 665 Fforce_debugging_signal (Qt); | |
| 666 /* Unlikely to be reached */ | |
| 667 } | |
| 668 | |
| 669 #endif | |
| 670 | |
| 428 | 671 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 672 etc. variables call for this. CONDITIONS is the list of conditions | |
| 673 associated with the error being signalled. SIG is the actual error | |
| 674 being signalled, and DATA is the associated data (these are exactly | |
| 675 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 676 list of error handlers that are to be put in place while the debugger | |
| 677 is called. This is generally the remaining handlers that are | |
| 678 outside of the innermost handler trapping this error. This way, | |
| 679 if the same error occurs inside of the debugger, you usually don't get | |
| 680 the debugger entered recursively. | |
| 681 | |
| 682 This function returns Qunbound if it didn't call the debugger or if | |
| 683 the user asked (through 'c') that XEmacs should pretend like the | |
| 684 debugger was never entered. Otherwise, it returns the value | |
| 685 that the user specified with `r'. (Note that much of the time, | |
| 686 the user will abort with C-], and we will never have a chance to | |
| 687 return anything at all.) | |
| 688 | |
| 689 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 690 and stack-trace-on-signal to control whether we do anything. | |
| 691 This is so that debug-on-error doesn't make handled errors | |
| 692 cause the debugger to get invoked. | |
| 693 | |
| 694 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 695 those functions aren't done more than once in a single `signal' | |
| 696 session. */ | |
| 697 | |
| 698 static Lisp_Object | |
| 699 signal_call_debugger (Lisp_Object conditions, | |
| 700 Lisp_Object sig, Lisp_Object data, | |
| 701 Lisp_Object active_handlers, | |
| 702 int signal_vars_only, | |
| 703 int *stack_trace_displayed, | |
| 704 int *debugger_entered) | |
| 705 { | |
| 853 | 706 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 707 /* This function can GC */ |
| 853 | 708 #else /* reality check */ |
| 709 /* This function cannot GC because it inhibits GC during its operation */ | |
| 710 #endif | |
| 711 | |
| 428 | 712 Lisp_Object val = Qunbound; |
| 713 Lisp_Object all_handlers = Vcondition_handlers; | |
| 714 Lisp_Object temp_data = Qnil; | |
| 853 | 715 int outer_speccount = specpdl_depth(); |
| 716 int speccount; | |
| 717 | |
| 718 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 719 struct gcpro gcpro1, gcpro2; |
| 720 GCPRO2 (all_handlers, temp_data); | |
| 853 | 721 #else |
| 722 begin_gc_forbidden (); | |
| 723 #endif | |
| 724 | |
| 725 speccount = specpdl_depth(); | |
| 428 | 726 |
| 727 Vcondition_handlers = active_handlers; | |
| 728 | |
| 729 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 730 | |
| 731 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 732 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 733 && !skip_debugger (conditions, temp_data)) | |
| 734 { | |
| 735 specbind (Qdebug_on_error, Qnil); | |
| 736 specbind (Qstack_trace_on_error, Qnil); | |
| 737 specbind (Qdebug_on_signal, Qnil); | |
| 738 specbind (Qstack_trace_on_signal, Qnil); | |
| 739 | |
| 442 | 740 if (!noninteractive) |
|
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|
741 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 742 backtrace_259, |
| 743 Qnil, | |
| 744 Qnil); | |
| 745 else /* in batch mode, we want this going to stderr. */ | |
| 746 backtrace_259 (Qnil); | |
| 771 | 747 unbind_to (speccount); |
| 428 | 748 *stack_trace_displayed = 1; |
| 749 } | |
| 750 | |
| 751 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 752 && (EQ (sig, Qquit) | |
| 753 ? debug_on_quit | |
| 754 : wants_debugger (Vdebug_on_error, conditions)) | |
| 755 && !skip_debugger (conditions, temp_data)) | |
| 756 { | |
| 757 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 758 |
| 428 | 759 specbind (Qdebug_on_error, Qnil); |
| 760 specbind (Qstack_trace_on_error, Qnil); | |
| 761 specbind (Qdebug_on_signal, Qnil); | |
| 762 specbind (Qstack_trace_on_signal, Qnil); | |
| 763 | |
| 1130 | 764 #ifdef DEBUG_XEMACS |
| 765 if (noninteractive) | |
| 766 trace_out_and_die (Fcons (sig, data)); | |
| 767 #endif | |
| 768 | |
| 428 | 769 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 770 unbind_to (speccount); |
| 428 | 771 *debugger_entered = 1; |
| 772 } | |
| 773 | |
| 774 if (!entering_debugger && !*stack_trace_displayed | |
| 775 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 776 { | |
| 777 specbind (Qdebug_on_error, Qnil); | |
| 778 specbind (Qstack_trace_on_error, Qnil); | |
| 779 specbind (Qdebug_on_signal, Qnil); | |
| 780 specbind (Qstack_trace_on_signal, Qnil); | |
| 781 | |
| 442 | 782 if (!noninteractive) |
|
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|
783 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 784 backtrace_259, |
| 785 Qnil, | |
| 786 Qnil); | |
| 787 else /* in batch mode, we want this going to stderr. */ | |
| 788 backtrace_259 (Qnil); | |
| 771 | 789 unbind_to (speccount); |
| 428 | 790 *stack_trace_displayed = 1; |
| 791 } | |
| 792 | |
| 793 if (!entering_debugger && !*debugger_entered | |
| 794 && (EQ (sig, Qquit) | |
| 795 ? debug_on_quit | |
| 796 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 797 { | |
| 798 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 799 |
| 428 | 800 specbind (Qdebug_on_error, Qnil); |
| 801 specbind (Qstack_trace_on_error, Qnil); | |
| 802 specbind (Qdebug_on_signal, Qnil); | |
| 803 specbind (Qstack_trace_on_signal, Qnil); | |
| 804 | |
| 1130 | 805 #ifdef DEBUG_XEMACS |
| 806 if (noninteractive) | |
| 807 trace_out_and_die (Fcons (sig, data)); | |
| 808 #endif | |
| 809 | |
| 428 | 810 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 811 *debugger_entered = 1; | |
| 812 } | |
| 813 | |
| 853 | 814 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 815 UNGCPRO; |
| 853 | 816 #endif |
| 428 | 817 Vcondition_handlers = all_handlers; |
| 853 | 818 return unbind_to_1 (outer_speccount, val); |
| 428 | 819 } |
| 820 | |
| 821 | |
| 822 /************************************************************************/ | |
| 823 /* The basic special forms */ | |
| 824 /************************************************************************/ | |
| 825 | |
|
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826 /* Except for Fprogn(), the basic special operators below are only called |
| 428 | 827 from interpreted code. The byte compiler turns them into bytecodes. */ |
| 828 | |
| 829 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
|
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830 Eval ARGS until one of them yields non-nil, then return that value. |
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831 The remaining ARGS are not evalled at all. |
| 428 | 832 If all args return nil, return nil. |
|
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833 |
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834 Any multiple values from the last form, and only from the last form, are |
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835 passed back. See `values' and `multiple-value-bind'. |
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836 |
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837 arguments: (&rest ARGS) |
| 428 | 838 */ |
| 839 (args)) | |
| 840 { | |
| 841 /* This function can GC */ | |
|
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842 Lisp_Object val = Qnil; |
| 428 | 843 |
|
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844 LIST_LOOP_3 (arg, args, tail) |
| 428 | 845 { |
|
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846 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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847 { |
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848 if (NILP (XCDR (tail))) |
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849 { |
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850 /* Pass back multiple values if this is the last one: */ |
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851 return val; |
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852 } |
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|
853 |
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|
854 return IGNORE_MULTIPLE_VALUES (val); |
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855 } |
| 428 | 856 } |
| 857 | |
|
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|
858 return val; |
| 428 | 859 } |
| 860 | |
| 861 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
|
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862 Eval ARGS until one of them yields nil, then return nil. |
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863 The remaining ARGS are not evalled at all. |
| 428 | 864 If no arg yields nil, return the last arg's value. |
|
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865 |
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866 Any multiple values from the last form, and only from the last form, are |
|
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|
867 passed back. See `values' and `multiple-value-bind'. |
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868 |
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869 arguments: (&rest ARGS) |
| 428 | 870 */ |
| 871 (args)) | |
| 872 { | |
| 873 /* This function can GC */ | |
|
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874 Lisp_Object val = Qt; |
| 428 | 875 |
|
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876 LIST_LOOP_3 (arg, args, tail) |
| 428 | 877 { |
|
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878 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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879 { |
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880 if (NILP (XCDR (tail))) |
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881 { |
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882 /* Pass back any multiple values for the last form: */ |
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883 return val; |
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884 } |
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|
885 |
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|
886 return Qnil; |
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|
887 } |
| 428 | 888 } |
| 889 | |
| 890 return val; | |
| 891 } | |
| 892 | |
| 893 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
|
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|
894 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 895 Returns the value of THEN or the value of the last of the ELSE's. |
| 896 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 897 If COND yields nil, and there are no ELSE's, the value is nil. | |
|
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|
898 |
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|
899 arguments: (COND THEN &rest ELSE) |
| 428 | 900 */ |
| 901 (args)) | |
| 902 { | |
| 903 /* This function can GC */ | |
| 904 Lisp_Object condition = XCAR (args); | |
| 905 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 906 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 907 | |
|
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908 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 909 return Feval (then_form); |
| 910 else | |
| 911 return Fprogn (else_forms); | |
| 912 } | |
| 913 | |
| 914 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 915 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 916 | |
| 917 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
|
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918 If COND yields non-nil, do BODY, else return nil. |
| 428 | 919 BODY can be zero or more expressions. If BODY is nil, return nil. |
|
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920 |
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|
921 arguments: (COND &rest BODY) |
| 428 | 922 */ |
| 923 (int nargs, Lisp_Object *args)) | |
| 924 { | |
| 925 Lisp_Object cond = args[0]; | |
| 926 Lisp_Object body; | |
| 853 | 927 |
| 428 | 928 switch (nargs) |
| 929 { | |
| 930 case 1: body = Qnil; break; | |
| 931 case 2: body = args[1]; break; | |
| 932 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 933 } | |
| 934 | |
| 935 return list3 (Qif, cond, body); | |
| 936 } | |
| 937 | |
| 938 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
|
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|
939 If COND yields nil, do BODY, else return nil. |
| 428 | 940 BODY can be zero or more expressions. If BODY is nil, return nil. |
|
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|
941 |
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|
942 arguments: (COND &rest BODY) |
| 428 | 943 */ |
| 944 (int nargs, Lisp_Object *args)) | |
| 945 { | |
| 946 Lisp_Object cond = args[0]; | |
| 947 Lisp_Object body = Flist (nargs-1, args+1); | |
| 948 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 949 } | |
| 950 | |
| 951 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
|
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|
952 Try each clause until one succeeds. |
| 428 | 953 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 954 and, if the value is non-nil, this clause succeeds: | |
| 955 then the expressions in BODY are evaluated and the last one's | |
| 956 value is the value of the cond-form. | |
| 957 If no clause succeeds, cond returns nil. | |
| 958 If a clause has one element, as in (CONDITION), | |
| 959 CONDITION's value if non-nil is returned from the cond-form. | |
|
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|
960 |
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|
961 arguments: (&rest CLAUSES) |
| 428 | 962 */ |
| 963 (args)) | |
| 964 { | |
| 965 /* This function can GC */ | |
| 442 | 966 REGISTER Lisp_Object val; |
| 428 | 967 |
| 968 LIST_LOOP_2 (clause, args) | |
| 969 { | |
| 970 CHECK_CONS (clause); | |
|
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|
971 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 972 { |
| 973 if (!NILP (clause = XCDR (clause))) | |
| 974 { | |
| 975 CHECK_TRUE_LIST (clause); | |
|
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|
976 /* Pass back any multiple values here: */ |
| 428 | 977 val = Fprogn (clause); |
| 978 } | |
| 979 return val; | |
| 980 } | |
| 981 } | |
| 982 | |
| 983 return Qnil; | |
| 984 } | |
| 985 | |
| 986 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
|
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987 Eval BODY forms sequentially and return value of last one. |
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|
988 |
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|
989 arguments: (&rest BODY) |
| 428 | 990 */ |
| 991 (args)) | |
| 992 { | |
| 993 /* This function can GC */ | |
| 994 /* Caller must provide a true list in ARGS */ | |
| 442 | 995 REGISTER Lisp_Object val = Qnil; |
| 428 | 996 struct gcpro gcpro1; |
| 997 | |
| 998 GCPRO1 (args); | |
| 999 | |
| 1000 { | |
| 1001 LIST_LOOP_2 (form, args) | |
| 1002 val = Feval (form); | |
| 1003 } | |
| 1004 | |
| 1005 UNGCPRO; | |
| 1006 return val; | |
| 1007 } | |
| 1008 | |
| 1009 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1010 Lisp_Object across calls to Feval(). */ | |
| 1011 | |
| 1012 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1013 Similar to `progn', but the value of the first form is returned. | |
|
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|
1014 |
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|
1015 All the arguments are evaluated sequentially. The value of FIRST is saved |
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|
1016 during evaluation of the remaining args, whose values are discarded. |
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|
1017 |
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1018 arguments: (FIRST &rest BODY) |
| 428 | 1019 */ |
| 1020 (args)) | |
| 1021 { | |
| 1849 | 1022 Lisp_Object val; |
| 428 | 1023 struct gcpro gcpro1; |
| 1024 | |
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1025 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1026 |
| 1027 GCPRO1 (val); | |
| 1028 | |
| 1029 { | |
| 1030 LIST_LOOP_2 (form, XCDR (args)) | |
| 1031 Feval (form); | |
| 1032 } | |
| 1033 | |
| 1034 UNGCPRO; | |
| 1035 return val; | |
| 1036 } | |
| 1037 | |
| 1038 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1039 Similar to `progn', but the value of the second form is returned. | |
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1040 |
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1041 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1042 during evaluation of the remaining args, whose values are discarded. |
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1043 |
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1044 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1045 */ |
| 1046 (args)) | |
| 1047 { | |
| 1048 /* This function can GC */ | |
| 1849 | 1049 Lisp_Object val; |
| 428 | 1050 struct gcpro gcpro1; |
| 1051 | |
| 1052 Feval (XCAR (args)); | |
| 1053 args = XCDR (args); | |
|
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1054 |
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1055 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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|
1056 |
| 428 | 1057 args = XCDR (args); |
| 1058 | |
| 1059 GCPRO1 (val); | |
| 1060 | |
| 442 | 1061 { |
| 1062 LIST_LOOP_2 (form, args) | |
| 1063 Feval (form); | |
| 1064 } | |
| 428 | 1065 |
| 1066 UNGCPRO; | |
| 1067 return val; | |
| 1068 } | |
| 1069 | |
| 1070 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
|
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1071 Bind variables according to VARLIST then eval BODY. |
| 428 | 1072 The value of the last form in BODY is returned. |
| 1073 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1074 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1075 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
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1076 |
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1077 arguments: (VARLIST &rest BODY) |
| 428 | 1078 */ |
| 1079 (args)) | |
| 1080 { | |
| 1081 /* This function can GC */ | |
| 1082 Lisp_Object varlist = XCAR (args); | |
| 1083 Lisp_Object body = XCDR (args); | |
| 1084 int speccount = specpdl_depth(); | |
| 1085 | |
| 1086 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1087 { | |
| 1088 Lisp_Object symbol, value, tem; | |
| 1089 if (SYMBOLP (var)) | |
| 1090 symbol = var, value = Qnil; | |
| 1091 else | |
| 1092 { | |
| 1093 CHECK_CONS (var); | |
| 1094 symbol = XCAR (var); | |
| 1095 tem = XCDR (var); | |
| 1096 if (NILP (tem)) | |
| 1097 value = Qnil; | |
| 1098 else | |
| 1099 { | |
| 1100 CHECK_CONS (tem); | |
|
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|
1101 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1102 if (!NILP (XCDR (tem))) |
| 563 | 1103 sferror |
| 428 | 1104 ("`let' bindings can have only one value-form", var); |
| 1105 } | |
| 1106 } | |
| 1107 specbind (symbol, value); | |
| 1108 } | |
| 771 | 1109 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1110 } |
| 1111 | |
| 1112 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
|
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1113 Bind variables according to VARLIST then eval BODY. |
| 428 | 1114 The value of the last form in BODY is returned. |
| 1115 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1116 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1117 All the VALUEFORMs are evalled before any symbols are bound. | |
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1118 |
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1119 arguments: (VARLIST &rest BODY) |
| 428 | 1120 */ |
| 1121 (args)) | |
| 1122 { | |
| 1123 /* This function can GC */ | |
| 1124 Lisp_Object varlist = XCAR (args); | |
| 1125 Lisp_Object body = XCDR (args); | |
| 1126 int speccount = specpdl_depth(); | |
| 1127 Lisp_Object *temps; | |
| 1128 int idx; | |
| 1129 struct gcpro gcpro1; | |
| 1130 | |
| 1131 /* Make space to hold the values to give the bound variables. */ | |
| 1132 { | |
| 1133 int varcount; | |
| 1134 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1135 temps = alloca_array (Lisp_Object, varcount); | |
| 1136 } | |
| 1137 | |
| 1138 /* Compute the values and store them in `temps' */ | |
| 1139 GCPRO1 (*temps); | |
| 1140 gcpro1.nvars = 0; | |
| 1141 | |
| 1142 idx = 0; | |
| 442 | 1143 { |
| 1144 LIST_LOOP_2 (var, varlist) | |
| 1145 { | |
| 1146 Lisp_Object *value = &temps[idx++]; | |
| 1147 if (SYMBOLP (var)) | |
| 1148 *value = Qnil; | |
| 1149 else | |
| 1150 { | |
| 1151 Lisp_Object tem; | |
| 1152 CHECK_CONS (var); | |
| 1153 tem = XCDR (var); | |
| 1154 if (NILP (tem)) | |
| 1155 *value = Qnil; | |
| 1156 else | |
| 1157 { | |
| 1158 CHECK_CONS (tem); | |
|
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|
1159 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1160 gcpro1.nvars = idx; |
| 1161 | |
| 1162 if (!NILP (XCDR (tem))) | |
| 563 | 1163 sferror |
| 442 | 1164 ("`let' bindings can have only one value-form", var); |
| 1165 } | |
| 1166 } | |
| 1167 } | |
| 1168 } | |
| 428 | 1169 |
| 1170 idx = 0; | |
| 442 | 1171 { |
| 1172 LIST_LOOP_2 (var, varlist) | |
| 1173 { | |
| 1174 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1175 } | |
| 1176 } | |
| 428 | 1177 |
| 1178 UNGCPRO; | |
| 1179 | |
| 771 | 1180 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1181 } |
| 1182 | |
| 1183 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
|
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|
1184 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1185 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1186 until TEST returns nil. | |
|
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|
1187 |
|
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|
1188 arguments: (TEST &rest BODY) |
| 428 | 1189 */ |
| 1190 (args)) | |
| 1191 { | |
| 1192 /* This function can GC */ | |
| 1193 Lisp_Object test = XCAR (args); | |
| 1194 Lisp_Object body = XCDR (args); | |
| 1195 | |
|
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|
1196 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1197 { |
| 1198 QUIT; | |
| 1199 Fprogn (body); | |
| 1200 } | |
| 1201 | |
| 1202 return Qnil; | |
| 1203 } | |
| 1204 | |
| 1205 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1206 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1207 The symbols SYM are variables; they are literal (not evaluated). | |
| 1208 The values VAL are expressions; they are evaluated. | |
| 1209 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1210 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1211 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1212 The return value of the `setq' form is the value of the last VAL. | |
| 1213 */ | |
| 1214 (args)) | |
| 1215 { | |
| 1216 /* This function can GC */ | |
| 1217 int nargs; | |
| 2421 | 1218 Lisp_Object retval = Qnil; |
| 428 | 1219 |
| 1220 GET_LIST_LENGTH (args, nargs); | |
| 1221 | |
| 1222 if (nargs & 1) /* Odd number of arguments? */ | |
| 1223 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1224 | |
| 2421 | 1225 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1226 { |
| 1227 val = Feval (val); | |
|
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Support full Common Lisp multiple values in C.
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|
1228 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1229 Fset (symbol, val); |
| 2421 | 1230 retval = val; |
| 428 | 1231 } |
| 1232 | |
| 2421 | 1233 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1234 | |
| 1235 return retval; | |
| 428 | 1236 } |
| 1237 | |
| 1238 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1239 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1240 |
| 3842 | 1241 `quote' differs from `function' in that it is a hint that an expression is |
| 1242 data, not a function. In particular, under some circumstances the byte | |
| 1243 compiler will compile an expression quoted with `function', but it will | |
| 1244 never do so for an expression quoted with `quote'. These issues are most | |
| 1245 important for lambda expressions (see `lambda'). | |
| 1246 | |
| 1247 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1248 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1249 contexts. A print function may use either. Internally the expression is | |
| 1250 represented as `(quote x)'). | |
| 428 | 1251 */ |
| 1252 (args)) | |
| 1253 { | |
| 1254 return XCAR (args); | |
| 1255 } | |
| 1256 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1257 /* Originally, this was just a function -- but `custom' used a garden- |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1258 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1259 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1260 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
1261 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
1262 In contrast with `quote', this is a function, not a special form; its |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1263 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1264 EXPR (if it is self-quoting) or a list `(quote EXPR)' if it is not |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1265 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
1266 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1267 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1268 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1269 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1270 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1271 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1272 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1273 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1274 case lrecord_type_symbol: |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1275 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1276 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
1277 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1278 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1279 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1280 case lrecord_type_cons: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1281 if (EQ (XCAR (expr), Qlambda)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1282 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1283 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1284 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1285 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1286 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1287 case lrecord_type_vector: |
|
17f7e9191c0b
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1288 case lrecord_type_string: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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1289 case lrecord_type_compiled_function: |
|
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1290 case lrecord_type_bit_vector: |
|
17f7e9191c0b
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1291 case lrecord_type_float: |
|
17f7e9191c0b
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1292 case lrecord_type_hash_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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|
1293 case lrecord_type_char_table: |
|
17f7e9191c0b
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|
1294 case lrecord_type_range_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1295 case lrecord_type_bignum: |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1296 case lrecord_type_ratio: |
|
17f7e9191c0b
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|
1297 case lrecord_type_bigfloat: |
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1298 return expr; |
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1299 } |
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1300 return list2 (Qquote, expr); |
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1301 } |
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1302 |
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1303 /* Fixnums and characters are self-quoting: */ |
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1304 return expr; |
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1305 } |
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1306 |
| 428 | 1307 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1308 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1309 | |
| 1310 `function' differs from `quote' in that it is a hint that an expression is | |
| 1311 a function, not data. In particular, under some circumstances the byte | |
| 1312 compiler will compile an expression quoted with `function', but it will | |
| 1313 never do so for an expression quoted with `quote'. However, the byte | |
| 1314 compiler will not compile an expression buried in a data structure such as | |
| 1315 a vector or a list which is not syntactically a function. These issues are | |
| 1316 most important for lambda expressions (see `lambda'). | |
| 1317 | |
| 1318 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1319 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1320 contexts. A print function may use either. Internally the expression is | |
| 1321 represented as `(function x)'). | |
| 428 | 1322 */ |
| 1323 (args)) | |
| 1324 { | |
| 1325 return XCAR (args); | |
| 1326 } | |
| 1327 | |
| 1328 | |
| 1329 /************************************************************************/ | |
| 1330 /* Defining functions/variables */ | |
| 1331 /************************************************************************/ | |
| 1332 static Lisp_Object | |
| 1333 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1334 { | |
| 1335 Ffset (name, defn); | |
|
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1336 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1337 return name; |
| 1338 } | |
| 1339 | |
| 1340 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
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1341 Define NAME as a function. |
| 428 | 1342 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1343 See also the function `interactive'. | |
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1344 |
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1345 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1346 */ |
| 1347 (args)) | |
| 1348 { | |
| 1349 /* This function can GC */ | |
| 1350 return define_function (XCAR (args), | |
| 1351 Fcons (Qlambda, XCDR (args))); | |
| 1352 } | |
| 1353 | |
| 1354 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
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1355 Define NAME as a macro. |
| 428 | 1356 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1357 When the macro is called, as in (NAME ARGS...), | |
| 1358 the function (lambda ARGLIST BODY...) is applied to | |
| 1359 the list ARGS... as it appears in the expression, | |
| 1360 and the result should be a form to be evaluated instead of the original. | |
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1361 |
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1362 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1363 */ |
| 1364 (args)) | |
| 1365 { | |
| 1366 /* This function can GC */ | |
| 1367 return define_function (XCAR (args), | |
| 1368 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1369 } | |
| 1370 | |
| 1371 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
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1372 Define SYMBOL as a variable. |
| 428 | 1373 You are not required to define a variable in order to use it, |
| 1374 but the definition can supply documentation and an initial value | |
| 1375 in a way that tags can recognize. | |
| 1376 | |
| 1377 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1378 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1379 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1380 void.) | |
| 1381 If SYMBOL is buffer-local, its default value is what is set; | |
| 1382 buffer-local values are not affected. | |
| 1383 INITVALUE and DOCSTRING are optional. | |
| 1384 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1385 This means that M-x set-variable recognizes it. |
| 428 | 1386 If INITVALUE is missing, SYMBOL's value is not set. |
| 1387 | |
| 1388 In lisp-interaction-mode defvar is treated as defconst. | |
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1389 |
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1390 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1391 */ |
| 1392 (args)) | |
| 1393 { | |
| 1394 /* This function can GC */ | |
| 1395 Lisp_Object sym = XCAR (args); | |
| 1396 | |
| 1397 if (!NILP (args = XCDR (args))) | |
| 1398 { | |
| 1399 Lisp_Object val = XCAR (args); | |
| 1400 | |
| 1401 if (NILP (Fdefault_boundp (sym))) | |
| 1402 { | |
| 1403 struct gcpro gcpro1; | |
| 1404 GCPRO1 (val); | |
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1405 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1406 Fset_default (sym, val); |
| 1407 UNGCPRO; | |
| 1408 } | |
| 1409 | |
| 1410 if (!NILP (args = XCDR (args))) | |
| 1411 { | |
| 1412 Lisp_Object doc = XCAR (args); | |
| 1413 Fput (sym, Qvariable_documentation, doc); | |
| 1414 if (!NILP (args = XCDR (args))) | |
| 563 | 1415 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1416 } |
| 1417 } | |
| 1418 | |
| 1419 #ifdef I18N3 | |
| 1420 if (!NILP (Vfile_domain)) | |
| 1421 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1422 #endif | |
| 1423 | |
| 1424 LOADHIST_ATTACH (sym); | |
| 1425 return sym; | |
| 1426 } | |
| 1427 | |
| 1428 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
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1429 Define SYMBOL as a constant variable. |
| 428 | 1430 The intent is that programs do not change this value, but users may. |
| 1431 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1432 If SYMBOL is buffer-local, its default value is what is set; | |
| 1433 buffer-local values are not affected. | |
| 1434 DOCSTRING is optional. | |
| 1435 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1436 This means that M-x set-variable recognizes it. |
| 428 | 1437 |
| 1438 Note: do not use `defconst' for user options in libraries that are not | |
| 1439 normally loaded, since it is useful for users to be able to specify | |
| 1440 their own values for such variables before loading the library. | |
| 1441 Since `defconst' unconditionally assigns the variable, | |
| 1442 it would override the user's choice. | |
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1443 |
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1444 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1445 */ |
| 1446 (args)) | |
| 1447 { | |
| 1448 /* This function can GC */ | |
| 1449 Lisp_Object sym = XCAR (args); | |
| 1450 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1451 struct gcpro gcpro1; | |
| 1452 | |
| 1453 GCPRO1 (val); | |
| 1454 | |
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1455 val = IGNORE_MULTIPLE_VALUES (val); |
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1456 |
| 428 | 1457 Fset_default (sym, val); |
| 1458 | |
| 1459 UNGCPRO; | |
| 1460 | |
| 1461 if (!NILP (args = XCDR (args))) | |
| 1462 { | |
| 1463 Lisp_Object doc = XCAR (args); | |
| 1464 Fput (sym, Qvariable_documentation, doc); | |
| 1465 if (!NILP (args = XCDR (args))) | |
| 563 | 1466 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1467 } |
| 1468 | |
| 1469 #ifdef I18N3 | |
| 1470 if (!NILP (Vfile_domain)) | |
| 1471 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1472 #endif | |
| 1473 | |
| 1474 LOADHIST_ATTACH (sym); | |
| 1475 return sym; | |
| 1476 } | |
| 1477 | |
|
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1478 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
|
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1479 with the symbol variable aliases. */ |
| 428 | 1480 |
| 1481 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1482 Return result of expanding macros at top level of FORM. | |
| 1483 If FORM is not a macro call, it is returned unchanged. | |
| 1484 Otherwise, the macro is expanded and the expansion is considered | |
| 1485 in place of FORM. When a non-macro-call results, it is returned. | |
| 1486 | |
| 442 | 1487 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1488 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1489 */ | |
| 442 | 1490 (form, environment)) |
| 428 | 1491 { |
| 1492 /* This function can GC */ | |
| 1493 /* With cleanups from Hallvard Furuseth. */ | |
| 1494 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1495 | |
| 1496 while (1) | |
| 1497 { | |
| 1498 /* Come back here each time we expand a macro call, | |
| 1499 in case it expands into another macro call. */ | |
| 1500 if (!CONSP (form)) | |
| 1501 break; | |
| 1502 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1503 def = sym = XCAR (form); | |
| 1504 tem = Qnil; | |
| 1505 /* Trace symbols aliases to other symbols | |
| 1506 until we get a symbol that is not an alias. */ | |
| 1507 while (SYMBOLP (def)) | |
| 1508 { | |
| 1509 QUIT; | |
| 1510 sym = def; | |
| 442 | 1511 tem = Fassq (sym, environment); |
| 428 | 1512 if (NILP (tem)) |
| 1513 { | |
| 1514 def = XSYMBOL (sym)->function; | |
| 1515 if (!UNBOUNDP (def)) | |
| 1516 continue; | |
| 1517 } | |
| 1518 break; | |
| 1519 } | |
| 442 | 1520 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1521 and if TEM is nil then DEF is SYM's function definition. */ |
| 1522 if (NILP (tem)) | |
| 1523 { | |
| 442 | 1524 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1525 Look at its function definition. */ |
| 1526 if (UNBOUNDP (def) | |
| 1527 || !CONSP (def)) | |
| 1528 /* Not defined or definition not suitable */ | |
| 1529 break; | |
| 1530 if (EQ (XCAR (def), Qautoload)) | |
| 1531 { | |
| 1532 /* Autoloading function: will it be a macro when loaded? */ | |
| 1533 tem = Felt (def, make_int (4)); | |
| 1534 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1535 { | |
| 1536 /* Yes, load it and try again. */ | |
| 970 | 1537 /* do_autoload GCPROs both arguments */ |
| 428 | 1538 do_autoload (def, sym); |
| 1539 continue; | |
| 1540 } | |
| 1541 else | |
| 1542 break; | |
| 1543 } | |
| 1544 else if (!EQ (XCAR (def), Qmacro)) | |
| 1545 break; | |
| 1546 else expander = XCDR (def); | |
| 1547 } | |
| 1548 else | |
| 1549 { | |
| 1550 expander = XCDR (tem); | |
| 1551 if (NILP (expander)) | |
| 1552 break; | |
| 1553 } | |
| 1554 form = apply1 (expander, XCDR (form)); | |
| 1555 } | |
| 1556 return form; | |
| 1557 } | |
| 1558 | |
| 1559 | |
| 1560 /************************************************************************/ | |
| 1561 /* Non-local exits */ | |
| 1562 /************************************************************************/ | |
| 1563 | |
| 1318 | 1564 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1565 | |
| 1566 int | |
| 1567 proper_redisplay_wrapping_in_place (void) | |
| 1568 { | |
| 1569 return !in_display | |
| 1570 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1571 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1572 } | |
| 1573 | |
| 1574 static void | |
| 1575 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1576 { | |
| 1577 assert_with_message | |
| 1578 (proper_redisplay_wrapping_in_place (), | |
| 1579 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1580 } | |
| 1581 | |
| 1582 static void | |
| 1583 check_proper_critical_section_lisp_protection (void) | |
| 1584 { | |
| 1585 assert_with_message | |
| 1586 (proper_redisplay_wrapping_in_place (), | |
| 1587 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1588 } | |
| 1589 | |
| 1590 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1591 | |
| 428 | 1592 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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1593 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1594 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1595 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1596 If no throw happens, `catch' returns the value of the last BODY form. |
| 1597 If a throw happens, it specifies the value to return from `catch'. | |
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1598 |
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1599 arguments: (TAG &rest BODY) |
| 428 | 1600 */ |
| 1601 (args)) | |
| 1602 { | |
| 1603 /* This function can GC */ | |
| 1604 Lisp_Object tag = Feval (XCAR (args)); | |
| 1605 Lisp_Object body = XCDR (args); | |
| 2532 | 1606 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1607 } |
| 1608 | |
| 1609 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1610 FUNC should return a Lisp_Object. | |
| 1611 This is how catches are done from within C code. */ | |
| 1612 | |
| 1613 Lisp_Object | |
| 1614 internal_catch (Lisp_Object tag, | |
| 1615 Lisp_Object (*func) (Lisp_Object arg), | |
| 1616 Lisp_Object arg, | |
| 853 | 1617 int * volatile threw, |
| 2532 | 1618 Lisp_Object * volatile thrown_tag, |
| 1619 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1620 { |
| 1621 /* This structure is made part of the chain `catchlist'. */ | |
| 1622 struct catchtag c; | |
| 1623 | |
| 1624 /* Fill in the components of c, and put it on the list. */ | |
| 1625 c.next = catchlist; | |
| 1626 c.tag = tag; | |
| 853 | 1627 c.actual_tag = Qnil; |
| 2532 | 1628 c.backtrace = Qnil; |
| 428 | 1629 c.val = Qnil; |
| 1630 c.backlist = backtrace_list; | |
| 1631 #if 0 /* FSFmacs */ | |
| 1632 /* #### */ | |
| 1633 c.handlerlist = handlerlist; | |
| 1634 #endif | |
| 1635 c.lisp_eval_depth = lisp_eval_depth; | |
| 1636 c.pdlcount = specpdl_depth(); | |
| 1637 #if 0 /* FSFmacs */ | |
| 1638 c.poll_suppress_count = async_timer_suppress_count; | |
| 1639 #endif | |
| 1640 c.gcpro = gcprolist; | |
| 1641 catchlist = &c; | |
| 1642 | |
| 1643 /* Call FUNC. */ | |
| 1644 if (SETJMP (c.jmp)) | |
| 1645 { | |
| 1646 /* Throw works by a longjmp that comes right here. */ | |
| 1647 if (threw) *threw = 1; | |
| 853 | 1648 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1649 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1650 return c.val; |
| 1651 } | |
| 1652 c.val = (*func) (arg); | |
| 1653 if (threw) *threw = 0; | |
| 853 | 1654 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1655 catchlist = c.next; |
| 853 | 1656 check_catchlist_sanity (); |
| 428 | 1657 return c.val; |
| 1658 } | |
| 1659 | |
| 1660 | |
| 1661 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1662 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1663 | |
| 2297 | 1664 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1665 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1666 condition-case form has a TAG of Qnil. |
| 1667 | |
| 1668 Before each catch is discarded, unbind all special bindings and | |
| 1669 execute all unwind-protect clauses made above that catch. Unwind | |
| 1670 the handler stack as we go, so that the proper handlers are in | |
| 1671 effect for each unwind-protect clause we run. At the end, restore | |
| 1672 some static info saved in CATCH, and longjmp to the location | |
| 1673 specified in the | |
| 1674 | |
| 1675 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1676 | |
| 2268 | 1677 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1678 Lisp_Object)); | |
| 1679 | |
| 1680 static DOESNT_RETURN | |
| 853 | 1681 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1682 { |
| 1683 REGISTER int last_time; | |
| 1684 | |
| 1685 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1686 Before each catch is discarded, unbind all special bindings | |
| 1687 and execute all unwind-protect clauses made above that catch. | |
| 1688 At the end, restore some static info saved in CATCH, | |
| 1689 and longjmp to the location specified. | |
| 1690 */ | |
| 1691 | |
| 1692 /* Save the value somewhere it will be GC'ed. | |
| 1693 (Can't overwrite tag slot because an unwind-protect may | |
| 1694 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1695 c->val = val; | |
| 853 | 1696 c->actual_tag = tag; |
| 428 | 1697 |
| 1698 #if 0 /* FSFmacs */ | |
| 1699 /* Restore the polling-suppression count. */ | |
| 1700 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1701 #endif | |
| 1702 | |
| 617 | 1703 #if 1 |
| 428 | 1704 do |
| 1705 { | |
| 1706 last_time = catchlist == c; | |
| 1707 | |
| 1708 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1709 handlers. */ | |
| 771 | 1710 unbind_to (catchlist->pdlcount); |
| 428 | 1711 catchlist = catchlist->next; |
| 853 | 1712 check_catchlist_sanity (); |
| 428 | 1713 } |
| 1714 while (! last_time); | |
| 617 | 1715 #else |
| 1716 /* Former XEmacs code. This is definitely not as correct because | |
| 1717 there may be a number of catches we're unwinding, and a number | |
| 1718 of unwind-protects in the process. By not undoing the catches till | |
| 1719 the end, there may be invalid catches still current. (This would | |
| 1720 be a particular problem with code like this: | |
| 1721 | |
| 1722 (catch 'foo | |
| 1723 (call-some-code-which-does... | |
| 1724 (catch 'bar | |
| 1725 (unwind-protect | |
| 1726 (call-some-code-which-does... | |
| 1727 (catch 'bar | |
| 1728 (call-some-code-which-does... | |
| 1729 (throw 'foo nil)))) | |
| 1730 (throw 'bar nil))))) | |
| 1731 | |
| 1732 This would try to throw to the inner (catch 'bar)! | |
| 1733 | |
| 1734 --ben | |
| 1735 */ | |
| 428 | 1736 /* Unwind the specpdl stack */ |
| 771 | 1737 unbind_to (c->pdlcount); |
| 428 | 1738 catchlist = c->next; |
| 853 | 1739 check_catchlist_sanity (); |
| 617 | 1740 #endif /* Former code */ |
| 428 | 1741 |
| 1204 | 1742 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1743 if (profiling_active) |
| 1744 { | |
| 1745 while (backtrace_list != c->backlist) | |
| 1746 { | |
| 1747 profile_record_unwind (backtrace_list); | |
| 1748 backtrace_list = backtrace_list->next; | |
| 1749 } | |
| 1750 } | |
| 1751 else | |
| 1752 backtrace_list = c->backlist; | |
| 428 | 1753 lisp_eval_depth = c->lisp_eval_depth; |
| 1754 | |
| 442 | 1755 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1756 throw_level = 0; |
| 1757 #endif | |
| 1758 LONGJMP (c->jmp, 1); | |
| 1759 } | |
| 1760 | |
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1761 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1762 Lisp_Object, Lisp_Object)); |
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1763 |
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1764 DOESNT_RETURN |
| 428 | 1765 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1766 Lisp_Object sig, Lisp_Object data) | |
| 1767 { | |
| 442 | 1768 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1769 /* die if we recurse more than is reasonable */ |
| 1770 if (++throw_level > 20) | |
| 2500 | 1771 ABORT (); |
| 428 | 1772 #endif |
| 1773 | |
| 1318 | 1774 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1775 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1776 #endif |
| 1123 | 1777 |
| 428 | 1778 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1779 "last resort" when there is no handler for this error and | |
| 1780 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1781 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1782 initialization stages) we would get in an infinite recursive |
| 1783 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1784 really-early-error-handler. | |
| 1785 | |
| 1786 Note that in fact the only time that the "last resort" | |
| 3025 | 1787 occurs is when there's no catch for `top-level' -- the |
| 1788 `top-level' catch and the catch-all error handler are | |
| 428 | 1789 established at the same time, in initial_command_loop/ |
| 1790 top_level_1. | |
| 1791 | |
| 853 | 1792 [[#### Fix this horrifitude!]] |
| 1793 | |
| 1794 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1795 */ |
| 1796 | |
| 1797 while (1) | |
| 1798 { | |
| 1799 REGISTER struct catchtag *c; | |
| 1800 | |
| 1801 #if 0 /* FSFmacs */ | |
| 1802 if (!NILP (tag)) /* #### */ | |
| 1803 #endif | |
| 1804 for (c = catchlist; c; c = c->next) | |
| 1805 { | |
| 2532 | 1806 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1807 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1808 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1809 unwind_to_catch (c, val, tag); | |
| 428 | 1810 } |
| 1811 if (!bomb_out_p) | |
| 1812 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1813 else | |
| 1814 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1815 } | |
| 1816 } | |
| 1817 | |
| 1818 /* See above, where CATCHLIST is defined, for a description of how | |
| 1819 Fthrow() works. | |
| 1820 | |
| 1821 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1822 back to the appropriate condition-case handler after (maybe) | |
| 1823 the debugger is entered. In that case, TAG is the value | |
| 1824 of Vcondition_handlers that was in place just after the | |
| 1825 condition-case handler was set up. The car of this will be | |
| 1826 some data referring to the handler: Its car will be Qunbound | |
| 1827 (thus, this tag can never be generated by Lisp code), and | |
| 1828 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1829 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1830 This works fine because Fthrow() does not care what TAG was | |
| 1831 passed to it: it just looks up the catch list for something | |
| 1832 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1833 back to the place that established the catch (in this case, | |
| 1834 condition_case_1). See below for more info. | |
| 1835 */ | |
| 1836 | |
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1837 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1838 Throw to the catch for TAG and return VALUE from it. |
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1839 |
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1840 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1841 back. Tags are the same if and only if they are `eq'. |
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1842 |
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1843 arguments: (TAG VALUE) |
| 428 | 1844 */ |
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1845 (args)) |
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1846 { |
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1847 int nargs; |
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1848 Lisp_Object tag, value; |
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1849 |
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1850 GET_LIST_LENGTH (args, nargs); |
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1851 if (nargs != 2) |
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1852 { |
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1853 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1854 } |
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1855 |
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1856 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1857 |
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1858 value = Feval (XCAR (XCDR (args))); |
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1859 |
| 444 | 1860 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1861 RETURN_NOT_REACHED (Qnil); |
| 428 | 1862 } |
| 1863 | |
| 1864 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1865 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1866 If BODYFORM completes normally, its value is returned | |
| 1867 after executing the UNWINDFORMS. | |
| 1868 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
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1869 |
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1870 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1871 */ |
| 1872 (args)) | |
| 1873 { | |
| 1874 /* This function can GC */ | |
| 1875 int speccount = specpdl_depth(); | |
| 1876 | |
| 1877 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1878 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1879 } |
| 1880 | |
| 1881 | |
| 1882 /************************************************************************/ | |
| 1292 | 1883 /* Trapping errors */ |
| 428 | 1884 /************************************************************************/ |
| 1885 | |
| 1886 static Lisp_Object | |
| 1887 condition_bind_unwind (Lisp_Object loser) | |
| 1888 { | |
| 617 | 1889 /* There is no problem freeing stuff here like there is in |
| 1890 condition_case_unwind(), because there are no outside pointers | |
| 1891 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1892 |
| 428 | 1893 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1894 Lisp_Object tem = XCAR (loser); | |
| 853 | 1895 int first = 1; |
| 428 | 1896 |
| 1897 while (CONSP (tem)) | |
| 1898 { | |
| 853 | 1899 Lisp_Object victim = tem; |
| 1900 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1901 free_opaque_ptr (XCAR (victim)); | |
| 1902 first = 0; | |
| 1903 tem = XCDR (victim); | |
| 428 | 1904 free_cons (victim); |
| 1905 } | |
| 1906 | |
| 1907 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1908 Vcondition_handlers = XCDR (loser); |
| 1909 | |
| 1910 free_cons (loser); | |
| 428 | 1911 return Qnil; |
| 1912 } | |
| 1913 | |
| 1914 static Lisp_Object | |
| 1915 condition_case_unwind (Lisp_Object loser) | |
| 1916 { | |
| 1917 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1918 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1919 catch. With the recent changes to unwind_to_catch(), the | |
| 1920 evil situation might not happen any more; it certainly could | |
| 1921 happen before because it did. But it's very precarious to rely | |
| 1922 on something like this. #### Instead we should rewrite, adopting | |
| 1923 the FSF's mechanism with a struct handler instead of | |
| 1924 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1925 to hold all of the values, and there's no possibility either of | |
| 1926 crashes from freeing objects too quickly, or objects not getting | |
| 1927 freed and hanging around till the next GC. | |
| 1928 | |
| 1929 In practice, the extra consing here should not matter because | |
| 1930 it only happens when we throw past the condition-case, which almost | |
| 1931 always is the result of an error. Most of the time, there will be | |
| 1932 no error, and we will free the objects below in the main function. | |
| 1933 | |
| 1934 --ben | |
| 1935 | |
| 1936 DO NOT DO: free_cons (XCAR (loser)); | |
| 1937 */ | |
| 1938 | |
| 428 | 1939 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1940 Vcondition_handlers = XCDR (loser); |
| 1941 | |
| 1942 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1943 return Qnil; |
| 1944 } | |
| 1945 | |
| 1946 /* Split out from condition_case_3 so that primitive C callers | |
| 1947 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1948 | |
| 1949 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1950 specified by HANDLERS. If no error occurs that is indicated by | |
| 1951 HANDLERS as something to be caught, the return value of this | |
| 1952 function is the return value from BFUN. If such an error does | |
| 1953 occur, HFUN is called, and its return value becomes the | |
| 1954 return value of condition_case_1(). The second argument passed | |
| 1955 to HFUN will always be HARG. The first argument depends on | |
| 1956 HANDLERS: | |
| 1957 | |
| 1958 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 1959 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 1960 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 1961 arguments passed to `signal'. The debugger is not invoked even if | |
| 1962 `debug-on-error' was set. | |
| 1963 | |
| 1964 A HANDLERS value of Qerror is the same as Qt except that the | |
| 1965 debugger is invoked if `debug-on-error' was set. | |
| 1966 | |
| 1967 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 1968 exactly as in `condition-case', and errors will be trapped | |
| 1969 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 1970 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 1971 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 1972 | |
| 1973 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 1974 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 1975 for why), establishes a catch whose tag is this new value of | |
| 1976 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 1977 it calls Fthrow(), setting TAG to this same new value of | |
| 1978 Vcondition_handlers and setting VAL to the same thing that will | |
| 1979 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 1980 jump point we just established, and we in turn just call the | |
| 1981 HFUN and return its value. | |
| 1982 | |
| 1983 For a real condition-case, HFUN will always be | |
| 1984 run_condition_case_handlers() and HARG is the argument VAR | |
| 1985 to condition-case. That function just binds VAR to the cons | |
| 1986 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 1987 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 1988 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 1989 it had *before* condition_case_1() was called. This maintains | |
| 1990 consistency (so that the state of things at exit of | |
| 1991 condition_case_1() is the same as at entry), and implies | |
| 1992 that the handler can signal the same error again (possibly | |
| 1993 after processing of its own), without getting in an infinite | |
| 1994 loop. */ | |
| 1995 | |
| 1996 Lisp_Object | |
| 1997 condition_case_1 (Lisp_Object handlers, | |
| 1998 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 1999 Lisp_Object barg, | |
| 2000 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2001 Lisp_Object harg) | |
| 2002 { | |
| 2003 int speccount = specpdl_depth(); | |
| 2004 struct catchtag c; | |
| 617 | 2005 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2006 |
| 2007 #if 0 /* FSFmacs */ | |
| 2008 c.tag = Qnil; | |
| 2009 #else | |
| 2010 /* Do consing now so out-of-memory error happens up front */ | |
| 2011 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2012 which is known specially by Fsignal. | |
| 617 | 2013 [[ This is an abomination, but to fix it would require either |
| 428 | 2014 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2015 or changing the byte-compiler output (no thanks).]] |
| 2016 | |
| 2017 The above comment is clearly wrong. FSF does not do it this way | |
| 2018 and did not change the byte-compiler output. Instead they use a | |
| 2019 `struct handler' to hold the various values (in place of our | |
| 2020 Vcondition_handlers) and chain them together, with pointers from | |
| 2021 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2022 consider moving to something similar, but not before I merge my | |
| 2023 stderr-proc workspace, which contains changes to these | |
| 2024 functions. --ben */ | |
| 428 | 2025 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2026 Vcondition_handlers); | |
| 2027 #endif | |
| 2028 c.val = Qnil; | |
| 853 | 2029 c.actual_tag = Qnil; |
| 2532 | 2030 c.backtrace = Qnil; |
| 428 | 2031 c.backlist = backtrace_list; |
| 2032 #if 0 /* FSFmacs */ | |
| 2033 /* #### */ | |
| 2034 c.handlerlist = handlerlist; | |
| 2035 #endif | |
| 2036 c.lisp_eval_depth = lisp_eval_depth; | |
| 2037 c.pdlcount = specpdl_depth(); | |
| 2038 #if 0 /* FSFmacs */ | |
| 2039 c.poll_suppress_count = async_timer_suppress_count; | |
| 2040 #endif | |
| 2041 c.gcpro = gcprolist; | |
| 2042 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2043 c.next = catchlist; | |
| 2044 | |
| 2045 if (SETJMP (c.jmp)) | |
| 2046 { | |
| 2047 /* throw does ungcpro, etc */ | |
| 2048 return (*hfun) (c.val, harg); | |
| 2049 } | |
| 2050 | |
| 2051 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2052 | |
| 2053 catchlist = &c; | |
| 2054 #if 0 /* FSFmacs */ | |
| 2055 h.handler = handlers; | |
| 2056 h.var = Qnil; | |
| 2057 h.next = handlerlist; | |
| 2058 h.tag = &c; | |
| 2059 handlerlist = &h; | |
| 2060 #else | |
| 2061 Vcondition_handlers = c.tag; | |
| 2062 #endif | |
| 2063 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2064 c.val = ((*bfun) (barg)); | |
| 2065 UNGCPRO; | |
| 617 | 2066 |
| 2067 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2068 GCPRO3 (harg, c.val, c.tag); | |
| 2069 | |
| 428 | 2070 catchlist = c.next; |
| 853 | 2071 check_catchlist_sanity (); |
| 617 | 2072 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2073 delete this here. */ | |
| 428 | 2074 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2075 unbind_to (speccount); |
| 617 | 2076 |
| 2077 UNGCPRO; | |
| 2078 /* free the conses *after* the unbind, because the unbind will run | |
| 2079 condition_case_unwind above. */ | |
| 853 | 2080 free_cons (XCAR (c.tag)); |
| 2081 free_cons (c.tag); | |
| 617 | 2082 return c.val; |
| 428 | 2083 } |
| 2084 | |
| 2085 static Lisp_Object | |
| 2086 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2087 { | |
| 2088 /* This function can GC */ | |
| 2089 #if 0 /* FSFmacs */ | |
| 2090 if (!NILP (h.var)) | |
| 2091 specbind (h.var, c.val); | |
| 2092 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2093 | |
| 2094 /* Note that this just undoes the binding of h.var; whoever | |
| 2095 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2096 throwing. */ | |
| 771 | 2097 unbind_to (c.pdlcount); |
| 428 | 2098 return val; |
| 2099 #else | |
| 2100 int speccount; | |
| 2101 | |
| 2102 CHECK_TRUE_LIST (val); | |
| 2103 if (NILP (var)) | |
| 2104 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2105 | |
| 2106 speccount = specpdl_depth(); | |
| 2107 specbind (var, Fcar (val)); | |
| 2108 val = Fprogn (Fcdr (val)); | |
| 771 | 2109 return unbind_to_1 (speccount, val); |
| 428 | 2110 #endif |
| 2111 } | |
| 2112 | |
| 2113 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2114 condition-case except that it takes three arguments rather | |
| 2115 than a single list of arguments. */ | |
| 2116 Lisp_Object | |
| 2117 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2118 { | |
| 2119 /* This function can GC */ | |
| 2120 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2121 { | |
| 2122 if (NILP (handler)) | |
| 2123 ; | |
| 2124 else if (CONSP (handler)) | |
| 2125 { | |
| 2126 Lisp_Object conditions = XCAR (handler); | |
| 2127 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2128 if (SYMBOLP (conditions)) | |
| 2129 ; | |
| 2130 else | |
| 2131 { | |
| 2132 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2133 if (!SYMBOLP (condition)) | |
| 2134 goto invalid_condition_handler; | |
| 2135 } | |
| 2136 } | |
| 2137 else | |
| 2138 { | |
| 2139 invalid_condition_handler: | |
| 563 | 2140 sferror ("Invalid condition handler", handler); |
| 428 | 2141 } |
| 2142 } | |
| 2143 | |
| 2144 CHECK_SYMBOL (var); | |
| 2145 | |
| 2146 return condition_case_1 (handlers, | |
| 2147 Feval, bodyform, | |
| 2148 run_condition_case_handlers, | |
| 2149 var); | |
| 2150 } | |
| 2151 | |
| 2152 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2153 Regain control when an error is signalled. | |
| 2154 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2155 Executes BODYFORM and returns its value if no error happens. | |
| 2156 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2157 where the BODY is made of Lisp expressions. | |
| 2158 | |
| 771 | 2159 A typical usage of `condition-case' looks like this: |
| 2160 | |
| 2161 (condition-case nil | |
| 2162 ;; you need a progn here if you want more than one statement ... | |
| 2163 (progn | |
| 2164 (do-something) | |
| 2165 (do-something-else)) | |
| 2166 (error | |
| 2167 (issue-warning-or) | |
| 2168 ;; but strangely, you don't need one here. | |
| 2169 (return-a-value-etc) | |
| 2170 )) | |
| 2171 | |
| 428 | 2172 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2173 error's condition names. If an error happens, the first applicable | |
| 2174 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2175 all errors, even those without the `error' condition name on them | |
| 2176 \(e.g. `quit'). | |
| 2177 | |
| 2178 The car of a handler may be a list of condition names | |
| 2179 instead of a single condition name. | |
| 2180 | |
| 2181 When a handler handles an error, | |
| 2182 control returns to the condition-case and the handler BODY... is executed | |
| 2183 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2184 VAR may be nil; then you do not get access to the signal information. | |
| 2185 | |
| 2186 The value of the last BODY form is returned from the condition-case. | |
| 2187 See also the function `signal' for more info. | |
| 2188 | |
| 2189 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2190 and the current catches, condition-cases, and bindings have all been | |
| 2191 popped back to the state they were in just before the call to | |
| 2192 `condition-case'. This means that resignalling the error from | |
| 2193 within the handler will not result in an infinite loop. | |
| 2194 | |
| 2195 If you want to establish an error handler that is called with the | |
| 2196 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2197 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2198 */ | |
| 2199 (args)) | |
| 2200 { | |
| 2201 /* This function can GC */ | |
| 2202 Lisp_Object var = XCAR (args); | |
| 2203 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2204 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2205 return condition_case_3 (bodyform, var, handlers); | |
| 2206 } | |
| 2207 | |
| 2208 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
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|
2209 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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diff
changeset
|
2210 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
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4686
diff
changeset
|
2211 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2212 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2213 that was current when `signal' was called, rather than when the handler | |
| 2214 was established. | |
| 2215 | |
| 2216 HANDLER should be a function of one argument, which is a cons of the args | |
| 2217 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2218 `signal' is called (this differs from `condition-case', which allows | |
| 2219 you to specify which errors are trapped). If the handler function | |
| 2220 returns, `signal' continues as if the handler were never invoked. | |
| 2221 \(It continues to look for handlers established earlier than this one, | |
| 2222 and invokes the standard error-handler if none is found.) | |
|
4693
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diff
changeset
|
2223 |
|
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diff
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|
2224 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2225 */ |
| 2226 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2227 { | |
| 2228 /* This function can GC */ | |
| 2229 int speccount = specpdl_depth(); | |
| 2230 Lisp_Object tem; | |
| 2231 | |
| 853 | 2232 tem = Ffunction_max_args (args[0]); |
| 2233 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2234 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2235 invalid_argument ("Must be function of one argument", args[0]); | |
| 2236 | |
| 2237 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2238 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2239 record_unwind_protect (condition_bind_unwind, tem); | |
| 2240 Vcondition_handlers = tem; | |
| 2241 | |
| 2242 /* Caller should have GC-protected args */ | |
| 771 | 2243 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2244 } |
| 2245 | |
| 853 | 2246 /* This is the C version of the above function. It calls FUN, passing it |
| 2247 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2248 which they were signalled. (HANDLER is only invoked if there was no | |
| 2249 handler (either from condition-case or call-with-condition-handler) set | |
| 2250 later on that handled the signal; therefore, this is a real error. | |
| 2251 | |
| 2252 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2253 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2254 ARG be void * to facilitate passing structures, but I changed to | |
| 2255 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2256 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2257 to convert between Lisp_Objects and structure pointers. */ | |
| 2258 | |
| 2259 Lisp_Object | |
| 2260 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2261 Lisp_Object), | |
| 2262 Lisp_Object handler_arg, | |
| 2263 Lisp_Object (*fun) (Lisp_Object), | |
| 2264 Lisp_Object arg) | |
| 2265 { | |
| 2266 /* This function can GC */ | |
| 1111 | 2267 int speccount = specpdl_depth (); |
| 853 | 2268 Lisp_Object tem; |
| 2269 | |
| 2270 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2271 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2272 noseeum_cons (handler_arg, Qnil)), |
| 2273 Vcondition_handlers); | |
| 2274 record_unwind_protect (condition_bind_unwind, tem); | |
| 2275 Vcondition_handlers = tem; | |
| 2276 | |
| 2277 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2278 } | |
| 2279 | |
| 428 | 2280 static int |
| 2281 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2282 { | |
| 2283 if (EQ (type, Qt)) | |
| 2284 /* (condition-case c # (t c)) catches -all- signals | |
| 2285 * Use with caution! */ | |
| 2286 return 1; | |
| 2287 | |
| 2288 if (SYMBOLP (type)) | |
| 2289 return !NILP (Fmemq (type, conditions)); | |
| 2290 | |
| 2291 for (; CONSP (type); type = XCDR (type)) | |
| 2292 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2293 return 1; | |
| 2294 | |
| 2295 return 0; | |
| 2296 } | |
| 2297 | |
| 2298 static Lisp_Object | |
| 2299 return_from_signal (Lisp_Object value) | |
| 2300 { | |
| 2301 #if 1 | |
| 2302 /* Most callers are not prepared to handle gc if this | |
| 2303 returns. So, since this feature is not very useful, | |
| 2304 take it out. */ | |
| 2305 /* Have called debugger; return value to signaller */ | |
| 2306 return value; | |
| 2307 #else /* But the reality is that that stinks, because: */ | |
| 2308 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2309 to be continuable!! */ | |
| 563 | 2310 signal_error (Qunimplemented, |
| 2311 "Returning a value from an error is no longer supported", | |
| 2312 Qunbound); | |
| 428 | 2313 #endif |
| 2314 } | |
| 2315 | |
| 2316 | |
| 2317 /************************************************************************/ | |
| 2318 /* the workhorse error-signaling function */ | |
| 2319 /************************************************************************/ | |
| 2320 | |
| 853 | 2321 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2322 that won't get signalled for errors occurring when | |
| 2323 call_with_suspended_errors() was invoked. */ | |
| 2324 | |
| 872 | 2325 /* Don't make static or it might be compiled away */ |
| 2326 void signal_1 (void); | |
| 2327 | |
| 2328 void | |
| 853 | 2329 signal_1 (void) |
| 2330 { | |
| 2331 } | |
| 2332 | |
| 428 | 2333 /* #### This function has not been synched with FSF. It diverges |
| 2334 significantly. */ | |
| 2335 | |
| 853 | 2336 /* The simplest external error function: it would be called |
| 2337 signal_continuable_error() in the terminology below, but it's | |
| 2338 Lisp-callable. */ | |
| 2339 | |
| 2340 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2341 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2342 An error symbol is a symbol defined using `define-error'. | |
| 2343 DATA should be a list. Its elements are printed as part of the error message. | |
| 2344 If the signal is handled, DATA is made available to the handler. | |
| 2345 See also the function `signal-error', and the functions to handle errors: | |
| 2346 `condition-case' and `call-with-condition-handler'. | |
| 2347 | |
| 2348 Note that this function can return, if the debugger is invoked and the | |
| 2349 user invokes the "return from signal" option. | |
| 2350 */ | |
| 2351 (error_symbol, data)) | |
| 428 | 2352 { |
| 2353 /* This function can GC */ | |
| 853 | 2354 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2355 Lisp_Object conditions = Qnil; | |
| 2356 Lisp_Object handlers = Qnil; | |
| 428 | 2357 /* signal_call_debugger() could get called more than once |
| 2358 (once when a call-with-condition-handler is about to | |
| 2359 be dealt with, and another when a condition-case handler | |
| 2360 is about to be invoked). So make sure the debugger and/or | |
| 2361 stack trace aren't done more than once. */ | |
| 2362 int stack_trace_displayed = 0; | |
| 2363 int debugger_entered = 0; | |
| 853 | 2364 |
| 2365 /* Fsignal() is one of these functions that's called all the time | |
| 2366 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2367 protect the objects because all sorts of weird stuff could | |
| 2368 happen. */ | |
| 2369 | |
| 2370 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2371 | |
| 2372 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2373 signal_1 (); | |
| 428 | 2374 |
| 2375 if (!initialized) | |
| 2376 { | |
| 2377 /* who knows how much has been initialized? Safest bet is | |
| 2378 just to bomb out immediately. */ | |
| 771 | 2379 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2380 ABORT (); |
| 428 | 2381 } |
| 2382 | |
| 3092 | 2383 #ifndef NEW_GC |
| 1123 | 2384 assert (!gc_in_progress); |
| 3092 | 2385 #endif /* not NEW_GC */ |
| 1123 | 2386 |
| 2387 /* We abort if in_display and we are not protected, as garbage | |
| 2388 collections and non-local exits will invariably be fatal, but in | |
| 2389 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2390 */ | |
| 2391 | |
| 1318 | 2392 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2393 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2394 #endif |
| 428 | 2395 |
| 853 | 2396 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2397 |
| 2398 for (handlers = Vcondition_handlers; | |
| 2399 CONSP (handlers); | |
| 2400 handlers = XCDR (handlers)) | |
| 2401 { | |
| 2402 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2403 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2404 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2405 | |
| 2406 if (!UNBOUNDP (handler_fun)) | |
| 2407 { | |
| 2408 /* call-with-condition-handler */ | |
| 2409 Lisp_Object tem; | |
| 2410 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2411 struct gcpro ngcpro1; | |
| 2412 NGCPRO1 (all_handlers); | |
| 2413 Vcondition_handlers = outer_handlers; | |
| 2414 | |
| 853 | 2415 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2416 outer_handlers, 1, |
| 2417 &stack_trace_displayed, | |
| 2418 &debugger_entered); | |
| 2419 if (!UNBOUNDP (tem)) | |
| 2420 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2421 | |
| 853 | 2422 if (OPAQUE_PTRP (handler_fun)) |
| 2423 { | |
| 2424 if (NILP (handler_data)) | |
| 2425 { | |
| 2426 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2427 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2428 (get_opaque_ptr (handler_fun)); | |
| 2429 | |
| 2430 tem = (*hfun) (error_symbol, data); | |
| 2431 } | |
| 2432 else | |
| 2433 { | |
| 2434 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2435 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2436 (get_opaque_ptr (handler_fun)); | |
| 2437 | |
| 2438 assert (NILP (XCDR (handler_data))); | |
| 2439 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2440 } | |
| 2441 } | |
| 2442 else | |
| 2443 { | |
| 2444 tem = Fcons (error_symbol, data); | |
| 2445 if (NILP (handler_data)) | |
| 2446 tem = call1 (handler_fun, tem); | |
| 2447 else | |
| 2448 { | |
| 2449 /* (This code won't be used (for now?).) */ | |
| 2450 struct gcpro nngcpro1; | |
| 2451 Lisp_Object args[3]; | |
| 2452 NNGCPRO1 (args[0]); | |
| 2453 nngcpro1.nvars = 3; | |
| 2454 args[0] = handler_fun; | |
| 2455 args[1] = tem; | |
| 2456 args[2] = handler_data; | |
| 2457 nngcpro1.var = args; | |
| 2458 tem = Fapply (3, args); | |
| 2459 NNUNGCPRO; | |
| 2460 } | |
| 2461 } | |
| 428 | 2462 NUNGCPRO; |
| 2463 #if 0 | |
| 2464 if (!EQ (tem, Qsignal)) | |
| 2465 return return_from_signal (tem); | |
| 2466 #endif | |
| 2467 /* If handler didn't throw, try another handler */ | |
| 2468 Vcondition_handlers = all_handlers; | |
| 2469 } | |
| 2470 | |
| 2471 /* It's a condition-case handler */ | |
| 2472 | |
| 2473 /* t is used by handlers for all conditions, set up by C code. | |
| 2474 * debugger is not called even if debug_on_error */ | |
| 2475 else if (EQ (handler_data, Qt)) | |
| 2476 { | |
| 2477 UNGCPRO; | |
|
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parents:
4657
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changeset
|
2478 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
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parents:
4657
diff
changeset
|
2479 0, Qnil, Qnil); |
| 428 | 2480 } |
| 2481 /* `error' is used similarly to the way `t' is used, but in | |
| 2482 addition it invokes the debugger if debug_on_error. | |
| 2483 This is normally used for the outer command-loop error | |
| 2484 handler. */ | |
| 2485 else if (EQ (handler_data, Qerror)) | |
| 2486 { | |
| 853 | 2487 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2488 data, | |
| 428 | 2489 outer_handlers, 0, |
| 2490 &stack_trace_displayed, | |
| 2491 &debugger_entered); | |
| 2492 | |
| 2493 UNGCPRO; | |
| 2494 if (!UNBOUNDP (tem)) | |
| 2495 return return_from_signal (tem); | |
| 2496 | |
| 853 | 2497 tem = Fcons (error_symbol, data); |
|
4677
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2498 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2499 } |
| 2500 else | |
| 2501 { | |
| 2502 /* handler established by real (Lisp) condition-case */ | |
| 2503 Lisp_Object h; | |
| 2504 | |
| 2505 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2506 { | |
| 2507 Lisp_Object clause = Fcar (h); | |
| 2508 Lisp_Object tem = Fcar (clause); | |
| 2509 | |
| 2510 if (condition_type_p (tem, conditions)) | |
| 2511 { | |
| 853 | 2512 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2513 outer_handlers, 1, |
| 2514 &stack_trace_displayed, | |
| 2515 &debugger_entered); | |
| 2516 UNGCPRO; | |
| 2517 if (!UNBOUNDP (tem)) | |
| 2518 return return_from_signal (tem); | |
| 2519 | |
| 2520 /* Doesn't return */ | |
| 853 | 2521 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
4677
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2522 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2523 } |
| 2524 } | |
| 2525 } | |
| 2526 } | |
| 2527 | |
| 2528 /* If no handler is present now, try to run the debugger, | |
| 2529 and if that fails, throw to top level. | |
| 2530 | |
| 2531 #### The only time that no handler is present is during | |
| 2532 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2533 there is no `top-level' catch. (That's why the |
| 428 | 2534 "bomb-out" hack was added.) |
| 2535 | |
| 853 | 2536 [[#### Fix this horrifitude!]] |
| 2537 | |
| 2538 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2539 | |
| 2540 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2541 &stack_trace_displayed, |
| 2542 &debugger_entered); | |
| 2543 UNGCPRO; | |
| 853 | 2544 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2545 data); /* Doesn't return */ | |
| 2268 | 2546 RETURN_NOT_REACHED (Qnil); |
| 428 | 2547 } |
| 2548 | |
| 2549 /****************** Error functions class 1 ******************/ | |
| 2550 | |
| 2551 /* Class 1: General functions that signal an error. | |
| 2552 These functions take an error type and a list of associated error | |
| 2553 data. */ | |
| 2554 | |
| 853 | 2555 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2556 |
| 2557 /* Signal a non-continuable error. */ | |
| 2558 | |
| 2559 DOESNT_RETURN | |
| 563 | 2560 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2561 { |
| 2562 for (;;) | |
| 2563 Fsignal (sig, data); | |
| 2564 } | |
| 853 | 2565 |
| 2566 #ifdef ERROR_CHECK_CATCH | |
| 2567 | |
| 2568 void | |
| 2569 check_catchlist_sanity (void) | |
| 2570 { | |
| 2571 #if 0 | |
| 2572 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2573 bug! */ | |
| 442 | 2574 struct catchtag *c; |
| 2575 int found_error_tag = 0; | |
| 2576 | |
| 2577 for (c = catchlist; c; c = c->next) | |
| 2578 { | |
| 2579 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2580 { | |
| 2581 found_error_tag = 1; | |
| 2582 break; | |
| 2583 } | |
| 2584 } | |
| 2585 | |
| 2586 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2587 #endif /* vou me tomar no cul */ |
| 2588 } | |
| 2589 | |
| 2590 void | |
| 2591 check_specbind_stack_sanity (void) | |
| 2592 { | |
| 2593 } | |
| 2594 | |
| 2595 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2596 |
| 2597 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2598 according to ERRB. CLASS is the class of warning and should | |
| 2599 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2600 Qresource, etc.). */ | |
| 2601 | |
| 2602 void | |
| 1204 | 2603 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2604 Error_Behavior errb) |
| 428 | 2605 { |
| 2606 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2607 return; | |
| 793 | 2608 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2609 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2610 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2611 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2612 else |
| 2613 for (;;) | |
| 2614 Fsignal (sig, data); | |
| 2615 } | |
| 2616 | |
| 2617 /* Signal a continuable error or display a warning or do nothing, | |
| 2618 according to ERRB. */ | |
| 2619 | |
| 2620 Lisp_Object | |
| 563 | 2621 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2622 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2623 { |
| 2624 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2625 return Qnil; | |
| 793 | 2626 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2627 { | |
| 1204 | 2628 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2629 return Qnil; |
| 2630 } | |
| 428 | 2631 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2632 { | |
| 1204 | 2633 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2634 return Qnil; |
| 2635 } | |
| 2636 else | |
| 2637 return Fsignal (sig, data); | |
| 2638 } | |
| 2639 | |
| 2640 | |
| 2641 /****************** Error functions class 2 ******************/ | |
| 2642 | |
| 563 | 2643 /* Class 2: Signal an error with a string and an associated object. |
| 2644 Normally these functions are used to attach one associated object, | |
| 2645 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2646 than one object, make a list of the objects with Qunbound as the | |
| 2647 first element. (If you have specifically two objects to attach, | |
| 2648 consider using the function in class 3 below.) These functions | |
| 2649 signal an error of a specified type, whose data is one or more | |
| 2650 objects (usually two), a string the related Lisp object(s) | |
| 2651 specified as FROB. */ | |
| 2652 | |
| 2653 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2654 to signal_error_1(). */ | |
| 2655 | |
| 2656 Lisp_Object | |
|
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2657 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2658 { |
| 2659 if (EQ (frob, Qunbound)) | |
| 2660 frob = Qnil; | |
| 2661 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2662 frob = XCDR (frob); | |
| 2663 else | |
| 2664 frob = list1 (frob); | |
| 2665 if (!reason) | |
| 2666 return frob; | |
| 2667 else | |
| 771 | 2668 return Fcons (build_msg_string (reason), frob); |
| 563 | 2669 } |
| 2670 | |
| 2671 DOESNT_RETURN | |
|
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2672 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2673 { |
| 2674 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2675 } | |
| 2676 | |
| 2677 void | |
|
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2678 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2679 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2680 Error_Behavior errb) |
| 563 | 2681 { |
| 2682 /* Optimization: */ | |
| 2683 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2684 return; | |
| 1204 | 2685 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2686 } |
| 2687 | |
| 2688 Lisp_Object | |
|
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2689 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2690 Lisp_Object frob) |
| 2691 { | |
| 2692 return Fsignal (type, build_error_data (reason, frob)); | |
| 2693 } | |
| 2694 | |
| 2695 Lisp_Object | |
|
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2696 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2697 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2698 Error_Behavior errb) |
| 563 | 2699 { |
| 2700 /* Optimization: */ | |
| 2701 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2702 return Qnil; | |
| 2703 return maybe_signal_continuable_error_1 (type, | |
| 2704 build_error_data (reason, frob), | |
| 1204 | 2705 class_, errb); |
| 563 | 2706 } |
| 2707 | |
| 2708 | |
| 2709 /****************** Error functions class 3 ******************/ | |
| 2710 | |
| 2711 /* Class 3: Signal an error with a string and two associated objects. | |
| 2712 These functions signal an error of a specified type, whose data | |
| 2713 is three objects, a string and two related Lisp objects. | |
| 2714 (The equivalent could be accomplished using the class 2 functions, | |
| 2715 but these are more convenient in this particular case.) */ | |
| 2716 | |
| 2717 DOESNT_RETURN | |
|
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2718 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2719 Lisp_Object frob0, Lisp_Object frob1) |
| 2720 { | |
| 771 | 2721 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2722 frob1)); |
| 2723 } | |
| 2724 | |
| 2725 void | |
|
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2726 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2727 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2728 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2729 { |
| 2730 /* Optimization: */ | |
| 2731 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2732 return; | |
| 771 | 2733 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2734 frob1), class_, errb); |
| 563 | 2735 } |
| 2736 | |
| 2737 Lisp_Object | |
|
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2738 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2739 Lisp_Object frob0, Lisp_Object frob1) |
| 2740 { | |
| 771 | 2741 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2742 frob1)); |
| 2743 } | |
| 2744 | |
| 2745 Lisp_Object | |
|
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2746 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2747 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2748 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2749 { |
| 2750 /* Optimization: */ | |
| 2751 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2752 return Qnil; | |
| 2753 return maybe_signal_continuable_error_1 | |
| 771 | 2754 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2755 class_, errb); |
| 563 | 2756 } |
| 2757 | |
| 2758 | |
| 2759 /****************** Error functions class 4 ******************/ | |
| 2760 | |
| 2761 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2762 These functions signal an error of a specified type, whose data |
| 428 | 2763 is a single string, created using the arguments. */ |
| 2764 | |
| 2765 DOESNT_RETURN | |
|
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2766 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2767 { |
| 2768 Lisp_Object obj; | |
| 2769 va_list args; | |
| 2770 | |
| 2771 va_start (args, fmt); | |
|
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2772 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2773 va_end (args); |
| 2774 | |
| 2775 /* Fsignal GC-protects its args */ | |
| 563 | 2776 signal_error (type, 0, obj); |
| 442 | 2777 } |
| 2778 | |
| 2779 void | |
| 1204 | 2780 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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2781 const Ascbyte *fmt, ...) |
| 442 | 2782 { |
| 2783 Lisp_Object obj; | |
| 2784 va_list args; | |
| 2785 | |
| 2786 /* Optimization: */ | |
| 2787 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2788 return; | |
| 2789 | |
| 2790 va_start (args, fmt); | |
|
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2791 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2792 va_end (args); |
| 2793 | |
| 2794 /* Fsignal GC-protects its args */ | |
| 1204 | 2795 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2796 } |
| 2797 | |
| 2798 Lisp_Object | |
|
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2799 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2800 { |
| 2801 Lisp_Object obj; | |
| 2802 va_list args; | |
| 2803 | |
| 2804 va_start (args, fmt); | |
|
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2805 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2806 va_end (args); |
| 2807 | |
| 2808 /* Fsignal GC-protects its args */ | |
| 2809 return Fsignal (type, list1 (obj)); | |
| 2810 } | |
| 2811 | |
| 2812 Lisp_Object | |
| 1204 | 2813 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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2814 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2815 { |
| 2816 Lisp_Object obj; | |
| 2817 va_list args; | |
| 2818 | |
| 2819 /* Optimization: */ | |
| 2820 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2821 return Qnil; | |
| 2822 | |
| 2823 va_start (args, fmt); | |
|
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2824 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2825 va_end (args); |
| 2826 | |
| 2827 /* Fsignal GC-protects its args */ | |
| 1204 | 2828 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2829 } |
| 2830 | |
| 2831 | |
| 2832 /****************** Error functions class 5 ******************/ | |
| 2833 | |
| 563 | 2834 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2835 These functions signal an error of a specified type, whose data |
| 563 | 2836 is a one or more objects, a string (created using the arguments) |
| 2837 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2838 is the same as for class 2.) | |
| 2839 | |
| 2840 There is no need for a class 6 because you can always attach 2 | |
| 2841 objects using class 5 (for FROB, specify a list with three | |
| 2842 elements, the first of which is Qunbound), and these functions are | |
| 2843 not commonly used. | |
| 2844 */ | |
| 442 | 2845 |
| 2846 DOESNT_RETURN | |
|
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2847 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2848 ...) |
| 442 | 2849 { |
| 2850 Lisp_Object obj; | |
| 2851 va_list args; | |
| 2852 | |
| 2853 va_start (args, fmt); | |
|
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2854 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2855 va_end (args); |
| 2856 | |
| 2857 /* Fsignal GC-protects its args */ | |
| 563 | 2858 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2859 } |
| 2860 | |
| 2861 void | |
| 563 | 2862 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2863 Lisp_Object class_, Error_Behavior errb, |
|
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2864 const Ascbyte *fmt, ...) |
| 442 | 2865 { |
| 2866 Lisp_Object obj; | |
| 2867 va_list args; | |
| 2868 | |
| 2869 /* Optimization: */ | |
| 2870 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2871 return; | |
| 2872 | |
| 2873 va_start (args, fmt); | |
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2874 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2875 va_end (args); |
| 2876 | |
| 2877 /* Fsignal GC-protects its args */ | |
| 1204 | 2878 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2879 errb); |
| 428 | 2880 } |
| 2881 | |
| 2882 Lisp_Object | |
| 563 | 2883 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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2884 const Ascbyte *fmt, ...) |
| 428 | 2885 { |
| 2886 Lisp_Object obj; | |
| 2887 va_list args; | |
| 2888 | |
| 2889 va_start (args, fmt); | |
|
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2890 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2891 va_end (args); |
| 2892 | |
| 2893 /* Fsignal GC-protects its args */ | |
| 563 | 2894 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2895 } |
| 2896 | |
| 2897 Lisp_Object | |
| 563 | 2898 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2899 Lisp_Object class_, |
| 578 | 2900 Error_Behavior errb, |
|
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2901 const Ascbyte *fmt, ...) |
| 428 | 2902 { |
| 2903 Lisp_Object obj; | |
| 2904 va_list args; | |
| 2905 | |
| 2906 /* Optimization: */ | |
| 2907 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2908 return Qnil; | |
| 2909 | |
| 2910 va_start (args, fmt); | |
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2911 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2912 va_end (args); |
| 2913 | |
| 2914 /* Fsignal GC-protects its args */ | |
| 563 | 2915 return maybe_signal_continuable_error_1 (type, |
| 2916 Fcons (obj, | |
| 2917 build_error_data (0, frob)), | |
| 1204 | 2918 class_, errb); |
| 428 | 2919 } |
| 2920 | |
| 2921 | |
| 2922 /* This is what the QUIT macro calls to signal a quit */ | |
| 2923 void | |
| 2924 signal_quit (void) | |
| 2925 { | |
| 853 | 2926 /* This function cannot GC. GC is prohibited because most callers do |
| 2927 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2928 --ben */ | |
| 2929 | |
| 2930 int count; | |
| 2931 | |
| 428 | 2932 if (EQ (Vquit_flag, Qcritical)) |
| 2933 debug_on_quit |= 2; /* set critical bit. */ | |
| 2934 Vquit_flag = Qnil; | |
| 853 | 2935 count = begin_gc_forbidden (); |
| 428 | 2936 /* note that this is continuable. */ |
| 2937 Fsignal (Qquit, Qnil); | |
| 853 | 2938 unbind_to (count); |
| 428 | 2939 } |
| 2940 | |
| 2941 | |
| 563 | 2942 /************************ convenience error functions ***********************/ |
| 2943 | |
| 436 | 2944 Lisp_Object |
| 428 | 2945 signal_void_function_error (Lisp_Object function) |
| 2946 { | |
| 436 | 2947 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2948 } |
| 2949 | |
| 436 | 2950 Lisp_Object |
| 428 | 2951 signal_invalid_function_error (Lisp_Object function) |
| 2952 { | |
| 436 | 2953 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 2954 } |
| 2955 | |
| 436 | 2956 Lisp_Object |
| 428 | 2957 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 2958 { | |
| 436 | 2959 return Fsignal (Qwrong_number_of_arguments, |
| 2960 list2 (function, make_int (nargs))); | |
| 428 | 2961 } |
| 2962 | |
| 2963 /* Used in list traversal macros for efficiency. */ | |
| 436 | 2964 DOESNT_RETURN |
| 428 | 2965 signal_malformed_list_error (Lisp_Object list) |
| 2966 { | |
| 563 | 2967 signal_error (Qmalformed_list, 0, list); |
| 428 | 2968 } |
| 2969 | |
| 436 | 2970 DOESNT_RETURN |
| 428 | 2971 signal_malformed_property_list_error (Lisp_Object list) |
| 2972 { | |
| 563 | 2973 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 2974 } |
| 2975 | |
| 436 | 2976 DOESNT_RETURN |
| 428 | 2977 signal_circular_list_error (Lisp_Object list) |
| 2978 { | |
| 563 | 2979 signal_error (Qcircular_list, 0, list); |
| 428 | 2980 } |
| 2981 | |
| 436 | 2982 DOESNT_RETURN |
| 428 | 2983 signal_circular_property_list_error (Lisp_Object list) |
| 2984 { | |
| 563 | 2985 signal_error (Qcircular_property_list, 0, list); |
| 428 | 2986 } |
| 442 | 2987 |
| 2267 | 2988 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 2989 DOESNT_RETURN |
|
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2990 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 2991 { |
| 563 | 2992 signal_error (Qsyntax_error, reason, frob); |
| 442 | 2993 } |
| 2994 | |
| 2995 DOESNT_RETURN | |
|
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2996 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 2997 { |
| 563 | 2998 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 2999 } | |
| 3000 | |
| 3001 void | |
|
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3002 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3003 Lisp_Object class_, Error_Behavior errb) |
| 3004 { | |
| 3005 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3006 } |
| 3007 | |
| 3008 DOESNT_RETURN | |
|
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3009 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3010 { |
| 3011 signal_error (Qstructure_formation_error, reason, frob); | |
| 3012 } | |
| 3013 | |
| 3014 DOESNT_RETURN | |
|
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3015 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3016 { |
| 3017 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3018 } | |
| 3019 | |
| 3020 void | |
|
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3021 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3022 Lisp_Object class_, Error_Behavior errb) |
| 3023 { | |
| 3024 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3025 } |
| 3026 | |
| 3027 DOESNT_RETURN | |
|
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3028 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3029 { |
| 563 | 3030 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3031 } |
| 3032 | |
| 3033 DOESNT_RETURN | |
|
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|
3034 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3035 Lisp_Object frob2) |
| 442 | 3036 { |
| 563 | 3037 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3038 } | |
| 3039 | |
| 3040 void | |
|
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|
3041 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3042 Lisp_Object class_, Error_Behavior errb) |
| 3043 { | |
| 3044 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3045 } |
| 3046 | |
| 3047 DOESNT_RETURN | |
|
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|
3048 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3049 { |
| 3050 signal_error (Qinvalid_constant, reason, frob); | |
| 3051 } | |
| 3052 | |
| 3053 DOESNT_RETURN | |
|
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|
3054 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3055 Lisp_Object frob2) |
| 563 | 3056 { |
| 3057 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3058 } | |
| 3059 | |
| 3060 void | |
|
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|
3061 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3062 Lisp_Object class_, Error_Behavior errb) |
| 3063 { | |
| 3064 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3065 } |
| 3066 | |
| 3067 DOESNT_RETURN | |
|
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|
3068 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3069 { |
| 563 | 3070 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3071 } |
| 3072 | |
| 3073 DOESNT_RETURN | |
|
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|
3074 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3075 Lisp_Object frob2) |
| 442 | 3076 { |
| 563 | 3077 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3078 } | |
| 3079 | |
| 3080 void | |
|
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|
3081 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3082 Lisp_Object class_, Error_Behavior errb) |
| 3083 { | |
| 3084 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3085 } |
| 3086 | |
| 3087 DOESNT_RETURN | |
|
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|
3088 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3089 { |
| 563 | 3090 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3091 } |
| 3092 | |
| 3093 DOESNT_RETURN | |
|
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|
3094 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3095 { |
| 563 | 3096 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3097 } | |
| 3098 | |
| 3099 void | |
|
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|
3100 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3101 Lisp_Object class_, Error_Behavior errb) |
| 3102 { | |
| 3103 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3104 } |
| 3105 | |
| 3106 DOESNT_RETURN | |
|
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|
3107 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3108 { |
| 3109 signal_error (Qinvalid_state, reason, frob); | |
| 3110 } | |
| 3111 | |
| 3112 DOESNT_RETURN | |
|
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|
3113 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3114 { |
| 3115 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3116 } | |
| 3117 | |
| 3118 void | |
|
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|
3119 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3120 Lisp_Object class_, Error_Behavior errb) |
| 3121 { | |
| 3122 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3123 } |
| 3124 | |
| 3125 DOESNT_RETURN | |
|
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|
3126 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3127 { |
| 3128 signal_error (Qwrong_type_argument, reason, frob); | |
| 3129 } | |
| 3130 | |
| 3131 DOESNT_RETURN | |
|
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diff
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|
3132 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3133 { |
| 3134 signal_error (Qstack_overflow, reason, frob); | |
| 3135 } | |
| 3136 | |
| 3137 DOESNT_RETURN | |
|
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|
3138 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3139 { |
| 3140 signal_error (Qout_of_memory, reason, frob); | |
| 3141 } | |
| 3142 | |
| 428 | 3143 |
| 3144 /************************************************************************/ | |
| 3145 /* User commands */ | |
| 3146 /************************************************************************/ | |
| 3147 | |
| 3148 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3149 Return t if FUNCTION makes provisions for interactive calling. | |
| 3150 This means it contains a description for how to read arguments to give it. | |
| 3151 The value is nil for an invalid function or a symbol with no function | |
| 3152 definition. | |
| 3153 | |
| 3154 Interactively callable functions include | |
| 3155 | |
| 3156 -- strings and vectors (treated as keyboard macros) | |
| 3157 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3158 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3159 (i.e. the interactive flag) | |
| 3160 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3161 value | |
| 3162 -- subrs (built-in functions) that are interactively callable | |
| 3163 | |
| 3164 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3165 */ | |
| 3166 (function)) | |
| 3167 { | |
| 3168 Lisp_Object fun = indirect_function (function, 0); | |
| 3169 | |
| 3170 if (COMPILED_FUNCTIONP (fun)) | |
| 3171 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3172 | |
| 3173 /* Lists may represent commands. */ | |
| 3174 if (CONSP (fun)) | |
| 3175 { | |
| 3176 Lisp_Object funcar = XCAR (fun); | |
| 3177 if (EQ (funcar, Qlambda)) | |
| 3178 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3179 if (EQ (funcar, Qautoload)) | |
| 3180 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3181 else | |
| 3182 return Qnil; | |
| 3183 } | |
| 3184 | |
| 3185 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3186 interactive spec. */ | |
| 3187 if (SUBRP (fun)) | |
| 3188 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3189 | |
| 3190 /* Strings and vectors are keyboard macros. */ | |
| 3191 if (VECTORP (fun) || STRINGP (fun)) | |
| 3192 return Qt; | |
| 3193 | |
| 3194 /* Everything else (including Qunbound) is not a command. */ | |
| 3195 return Qnil; | |
| 3196 } | |
| 3197 | |
| 3198 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3199 Execute CMD as an editor command. | |
| 3200 CMD must be an object that satisfies the `commandp' predicate. | |
| 3201 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3202 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3203 when reading the arguments. | |
| 3204 */ | |
| 444 | 3205 (cmd, record_flag, keys)) |
| 428 | 3206 { |
| 3207 /* This function can GC */ | |
| 3208 Lisp_Object prefixarg; | |
| 3209 Lisp_Object final = cmd; | |
| 4162 | 3210 PROFILE_DECLARE(); |
| 428 | 3211 struct console *con = XCONSOLE (Vselected_console); |
| 3212 | |
| 3213 prefixarg = con->prefix_arg; | |
| 3214 con->prefix_arg = Qnil; | |
| 3215 Vcurrent_prefix_arg = prefixarg; | |
| 3216 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3217 | |
| 3218 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3219 return run_hook (Qdisabled_command_hook); |
| 428 | 3220 |
| 3221 for (;;) | |
| 3222 { | |
| 3223 final = indirect_function (cmd, 1); | |
| 3224 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3225 { |
| 3226 /* do_autoload GCPROs both arguments */ | |
| 3227 do_autoload (final, cmd); | |
| 3228 } | |
| 428 | 3229 else |
| 3230 break; | |
| 3231 } | |
| 3232 | |
| 3233 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3234 { | |
| 3235 backtrace.function = &Qcall_interactively; | |
| 3236 backtrace.args = &cmd; | |
| 3237 backtrace.nargs = 1; | |
| 3238 backtrace.evalargs = 0; | |
| 1292 | 3239 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3240 backtrace.debug_on_exit = 0; |
| 1292 | 3241 backtrace.function_being_called = 0; |
| 428 | 3242 PUSH_BACKTRACE (backtrace); |
| 3243 | |
| 1292 | 3244 PROFILE_ENTER_FUNCTION (); |
| 444 | 3245 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3246 PROFILE_EXIT_FUNCTION (); |
| 428 | 3247 |
| 3248 POP_BACKTRACE (backtrace); | |
| 3249 return final; | |
| 3250 } | |
| 3251 else if (STRINGP (final) || VECTORP (final)) | |
| 3252 { | |
| 3253 return Fexecute_kbd_macro (final, prefixarg); | |
| 3254 } | |
| 3255 else | |
| 3256 { | |
| 3257 Fsignal (Qwrong_type_argument, | |
| 3258 Fcons (Qcommandp, | |
| 3259 (EQ (cmd, final) | |
| 3260 ? list1 (cmd) | |
| 3261 : list2 (cmd, final)))); | |
| 3262 return Qnil; | |
| 3263 } | |
| 3264 } | |
| 3265 | |
| 3266 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3267 Return t if function in which this appears was called interactively. | |
| 3268 This means that the function was called with call-interactively (which | |
| 3269 includes being called as the binding of a key) | |
| 3270 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3271 */ | |
| 3272 ()) | |
| 3273 { | |
| 3274 REGISTER struct backtrace *btp; | |
| 3275 REGISTER Lisp_Object fun; | |
| 3276 | |
| 3277 if (!INTERACTIVE) | |
| 3278 return Qnil; | |
| 3279 | |
| 3280 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3281 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3282 function). Note that *btp->function may be a symbol pointing at a | |
| 3283 compiled function. */ | |
| 3284 btp = backtrace_list; | |
| 3285 | |
| 3286 #if 0 /* FSFmacs */ | |
| 3287 | |
| 3288 /* #### FSFmacs does the following instead. I can't figure | |
| 3289 out which one is more correct. */ | |
| 3290 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3291 the top for Finteractive_p itself. If so, skip it. */ | |
| 3292 fun = Findirect_function (*btp->function); | |
| 3293 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3294 btp = btp->next; | |
| 3295 | |
| 3296 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3297 may be a frame for Fbyte_code. Now, given the strictest | |
| 3298 definition, this function isn't really being called | |
| 3299 interactively, but because that's the way Emacs 18 always builds | |
| 3300 byte-compiled functions, we'll accept it for now. */ | |
| 3301 if (EQ (*btp->function, Qbyte_code)) | |
| 3302 btp = btp->next; | |
| 3303 | |
| 3304 /* If this isn't a byte-compiled function, then we may now be | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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4846
diff
changeset
|
3305 looking at several frames for special operators. Skip past them. */ |
| 428 | 3306 while (btp && |
| 3307 btp->nargs == UNEVALLED) | |
| 3308 btp = btp->next; | |
| 3309 | |
| 3310 #else | |
| 3311 | |
| 3312 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3313 btp = btp->next; | |
| 3314 for (; | |
| 3315 btp && (btp->nargs == UNEVALLED | |
| 3316 || EQ (*btp->function, Qbyte_code)); | |
| 3317 btp = btp->next) | |
| 3318 {} | |
| 3319 /* btp now points at the frame of the innermost function | |
| 3320 that DOES eval its args. | |
| 3321 If it is a built-in function (such as load or eval-region) | |
| 3322 return nil. */ | |
| 3323 /* Beats me why this is necessary, but it is */ | |
| 3324 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3325 return Qt; | |
| 3326 | |
| 3327 #endif | |
| 3328 | |
| 3329 fun = Findirect_function (*btp->function); | |
| 3330 if (SUBRP (fun)) | |
| 3331 return Qnil; | |
| 3332 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3333 Return t if that function was called interactively. */ | |
| 3334 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3335 return Qt; | |
| 3336 return Qnil; | |
| 3337 } | |
| 3338 | |
| 3339 | |
| 3340 /************************************************************************/ | |
| 3341 /* Autoloading */ | |
| 3342 /************************************************************************/ | |
| 3343 | |
| 3344 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3345 Define FUNCTION to autoload from FILENAME. |
| 3346 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3347 The remaining optional arguments provide additional info about the | |
| 3348 real definition. | |
| 3349 DOCSTRING is documentation for FUNCTION. | |
| 3350 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3351 TYPE indicates the type of the object: | |
| 428 | 3352 nil or omitted says FUNCTION is a function, |
| 3353 `keymap' says FUNCTION is really a keymap, and | |
| 3354 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3355 If FUNCTION already has a non-void function definition that is not an |
| 3356 autoload object, this function does nothing and returns nil. | |
| 428 | 3357 */ |
| 444 | 3358 (function, filename, docstring, interactive, type)) |
| 428 | 3359 { |
| 3360 /* This function can GC */ | |
| 3361 CHECK_SYMBOL (function); | |
| 444 | 3362 CHECK_STRING (filename); |
| 428 | 3363 |
| 3364 /* If function is defined and not as an autoload, don't override */ | |
| 3365 { | |
| 3366 Lisp_Object f = XSYMBOL (function)->function; | |
| 3367 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3368 return Qnil; | |
| 3369 } | |
| 3370 | |
| 3371 if (purify_flag) | |
| 3372 { | |
| 3373 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3374 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3375 } |
| 440 | 3376 |
| 444 | 3377 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3378 docstring, |
| 3379 interactive, | |
| 3380 type))); | |
| 3381 } | |
| 3382 | |
| 3383 Lisp_Object | |
| 3384 un_autoload (Lisp_Object oldqueue) | |
| 3385 { | |
| 3386 /* This function can GC */ | |
| 3387 REGISTER Lisp_Object queue, first, second; | |
| 3388 | |
| 3389 /* Queue to unwind is current value of Vautoload_queue. | |
| 3390 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3391 queue = Vautoload_queue; | |
| 3392 Vautoload_queue = oldqueue; | |
| 3393 while (CONSP (queue)) | |
| 3394 { | |
| 3395 first = XCAR (queue); | |
| 3396 second = Fcdr (first); | |
| 3397 first = Fcar (first); | |
| 3398 if (NILP (second)) | |
| 3399 Vfeatures = first; | |
| 3400 else | |
| 3401 Ffset (first, second); | |
| 3402 queue = Fcdr (queue); | |
| 3403 } | |
| 3404 return Qnil; | |
| 3405 } | |
| 3406 | |
| 970 | 3407 /* do_autoload GCPROs both arguments */ |
| 428 | 3408 void |
| 3409 do_autoload (Lisp_Object fundef, | |
| 3410 Lisp_Object funname) | |
| 3411 { | |
| 3412 /* This function can GC */ | |
| 3413 int speccount = specpdl_depth(); | |
| 3414 Lisp_Object fun = funname; | |
| 970 | 3415 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3416 |
| 3417 CHECK_SYMBOL (funname); | |
| 970 | 3418 GCPRO3 (fundef, funname, fun); |
| 428 | 3419 |
| 3420 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3421 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3422 Vautoload_queue = Qt; | |
| 3423 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3424 | |
| 3425 { | |
| 3426 Lisp_Object queue; | |
| 3427 | |
| 3428 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3429 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3430 { | |
| 3431 Lisp_Object first = XCAR (queue); | |
| 3432 Lisp_Object second = Fcdr (first); | |
| 3433 | |
| 3434 first = Fcar (first); | |
| 3435 | |
| 3436 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3437 may be an atom if the autoload entry was generated by a defalias | |
| 3438 or fset. */ | |
| 3439 if (CONSP (second)) | |
| 3440 Fput (first, Qautoload, (XCDR (second))); | |
| 3441 } | |
| 3442 } | |
| 3443 | |
| 3444 /* Once loading finishes, don't undo it. */ | |
| 3445 Vautoload_queue = Qt; | |
| 771 | 3446 unbind_to (speccount); |
| 428 | 3447 |
| 3448 fun = indirect_function (fun, 0); | |
| 3449 | |
| 3450 #if 0 /* FSFmacs */ | |
| 3451 if (!NILP (Fequal (fun, fundef))) | |
| 3452 #else | |
| 3453 if (UNBOUNDP (fun) | |
| 3454 || (CONSP (fun) | |
| 3455 && EQ (XCAR (fun), Qautoload))) | |
| 3456 #endif | |
| 563 | 3457 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3458 UNGCPRO; |
| 3459 } | |
| 3460 | |
| 3461 | |
| 3462 /************************************************************************/ | |
| 3463 /* eval, funcall, apply */ | |
| 3464 /************************************************************************/ | |
| 3465 | |
| 814 | 3466 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3467 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3468 -- in particular, the calling of subrs and compiled functions, the most | |
| 3469 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3470 to do to squeeze more speed out except by switching to lexical | |
| 3471 variables, which would eliminate the specbind loop. (But the real gain | |
| 3472 from lexical variables would come from better optimization -- with | |
| 3473 dynamic binding, you have the constant problem that any function call | |
| 3474 that you haven't explicitly proven to be side-effect-free might | |
| 3475 potentially side effect your local variables, which makes optimization | |
| 3476 extremely difficult when there are function calls anywhere in a chunk of | |
| 3477 code to be optimized. Even worse, you don't know that *your* local | |
| 3478 variables aren't side-effecting an outer function's local variables, so | |
| 3479 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3480 | |
| 428 | 3481 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3482 int nargs, Lisp_Object args[]); |
| 428 | 3483 static int in_warnings; |
| 3484 | |
| 3485 | |
| 814 | 3486 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3487 int nargs, | |
| 3488 Lisp_Object args[]); | |
| 3489 | |
| 3490 /* The theory behind making this a separate function is to shrink | |
| 3491 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3492 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3493 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3494 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3495 | |
| 3496 void | |
| 3497 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3498 Lisp_Object args[]) | |
| 3499 { | |
| 3500 REGISTER int i = 0; | |
| 3501 int max_non_rest_args = f->args_in_array - 1; | |
| 3502 int bindargs = min (nargs, max_non_rest_args); | |
| 3503 | |
| 3504 for (i = 0; i < bindargs; i++) | |
| 3092 | 3505 #ifdef NEW_GC |
| 3506 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3507 args[i]); | |
| 3508 #else /* not NEW_GC */ | |
| 814 | 3509 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3510 #endif /* not NEW_GC */ |
| 814 | 3511 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3512 #ifdef NEW_GC |
| 3513 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3514 Qnil); | |
| 3515 #else /* not NEW_GC */ | |
| 814 | 3516 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3517 #endif /* not NEW_GC */ |
| 3518 #ifdef NEW_GC | |
| 3519 SPECBIND_FAST_UNSAFE | |
| 3520 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3521 nargs > max_non_rest_args ? | |
| 3522 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3523 Qnil); | |
| 3524 #else /* not NEW_GC */ | |
| 814 | 3525 SPECBIND_FAST_UNSAFE |
| 3526 (f->args[max_non_rest_args], | |
| 3527 nargs > max_non_rest_args ? | |
| 3528 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3529 Qnil); | |
| 3092 | 3530 #endif /* not NEW_GC */ |
| 814 | 3531 } |
| 3532 | |
| 3533 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3534 in ARGS, and return the result of evaluation. */ | |
| 3535 inline static Lisp_Object | |
| 3536 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3537 { | |
| 3538 /* This function can GC */ | |
| 3539 int speccount = specpdl_depth(); | |
| 3540 REGISTER int i = 0; | |
| 3541 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3542 | |
| 3543 if (!OPAQUEP (f->instructions)) | |
| 3544 /* Lazily munge the instructions into a more efficient form */ | |
| 3545 optimize_compiled_function (fun); | |
| 3546 | |
| 3547 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3548 the required space on the specbinding stack for binding the args | |
| 3549 and local variables of fun. So just reserve it once. */ | |
| 3550 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3551 | |
| 3552 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3553 optional arguments. */ | |
| 3554 { | |
| 3555 #if 1 | |
| 3556 for (i = 0; i < nargs; i++) | |
| 3092 | 3557 #ifdef NEW_GC |
| 3558 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3559 args[i]); | |
| 3560 #else /* not NEW_GC */ | |
| 814 | 3561 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3562 #endif /* not NEW_GC */ |
| 814 | 3563 #else |
| 3564 /* Here's an alternate way to write the loop that tries to further | |
| 3565 optimize funcalls for functions with few arguments by partially | |
| 3566 unrolling the loop. It's not clear whether this is a win since it | |
| 3567 increases the size of the function and the possibility of L1 cache | |
| 3568 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3569 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3570 compiler repeatedly and looking at the total time, show very | |
| 3571 little difference between the simple loop above, the unrolled code | |
| 3572 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3573 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3574 because it's smaller. */ | |
| 3575 switch (nargs) | |
| 3576 { | |
| 3577 default: | |
| 3578 for (i = nargs - 1; i >= 4; i--) | |
| 3579 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3580 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3581 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3582 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3583 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3584 case 0: break; | |
| 3585 } | |
| 3586 #endif | |
| 3587 } | |
| 3588 else if (nargs < f->min_args) | |
| 3589 goto wrong_number_of_arguments; | |
| 3590 else if (nargs < f->max_args) | |
| 3591 { | |
| 3592 for (i = 0; i < nargs; i++) | |
| 3092 | 3593 #ifdef NEW_GC |
| 3594 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3595 args[i]); | |
| 3596 #else /* not NEW_GC */ | |
| 814 | 3597 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3598 #endif /* not NEW_GC */ |
| 814 | 3599 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3600 #ifdef NEW_GC |
| 3601 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3602 Qnil); | |
| 3603 #else /* not NEW_GC */ | |
| 814 | 3604 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3605 #endif /* not NEW_GC */ |
| 814 | 3606 } |
| 3607 else if (f->max_args == MANY) | |
| 3608 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3609 else | |
| 3610 { | |
| 3611 wrong_number_of_arguments: | |
| 3612 /* The actual printed compiled_function object is incomprehensible. | |
| 3613 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3614 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3615 fun = *backtrace_list->function; | |
| 3616 return Fsignal (Qwrong_number_of_arguments, | |
| 3617 list2 (fun, make_int (nargs))); | |
| 3618 } | |
| 3619 | |
| 3620 { | |
| 3621 Lisp_Object value = | |
| 3622 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
|
4921
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3623 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3624 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3625 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3626 #endif |
| 814 | 3627 f->stack_depth, |
| 3628 XVECTOR_DATA (f->constants)); | |
| 3629 | |
| 3630 /* The attempt to optimize this by only unbinding variables failed | |
| 3631 because using buffer-local variables as function parameters | |
| 3632 leads to specpdl_ptr->func != 0 */ | |
| 3633 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3634 UNBIND_TO_GCPRO (speccount, value); | |
| 3635 return value; | |
| 3636 } | |
| 3637 } | |
| 3638 | |
| 428 | 3639 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3640 Evaluate FORM and return its value. | |
| 3641 */ | |
| 3642 (form)) | |
| 3643 { | |
| 3644 /* This function can GC */ | |
| 3645 Lisp_Object fun, val, original_fun, original_args; | |
| 3646 int nargs; | |
| 4162 | 3647 PROFILE_DECLARE(); |
| 428 | 3648 |
| 1318 | 3649 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3650 check_proper_critical_section_lisp_protection (); | |
| 3651 #endif | |
| 3652 | |
| 3989 | 3653 if (!CONSP (form)) |
| 3654 { | |
| 3655 if (SYMBOLP (form)) | |
| 3656 { | |
| 3657 return Fsymbol_value (form); | |
| 3658 } | |
| 3659 | |
| 3660 return form; | |
| 3661 } | |
| 3662 | |
| 428 | 3663 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3664 while (!in_warnings && !NILP (Vpending_warnings) |
| 3665 /* well, perhaps not so safe after all! */ | |
| 3666 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3667 { |
| 3668 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3669 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3670 int speccount = internal_bind_int (&in_warnings, 1); |
| 3671 | |
| 428 | 3672 this_warning_cons = Vpending_warnings; |
| 3673 this_warning = XCAR (this_warning_cons); | |
| 3674 /* in case an error occurs in the warn function, at least | |
| 3675 it won't happen infinitely */ | |
| 3676 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3677 free_cons (this_warning_cons); |
| 1204 | 3678 class_ = XCAR (this_warning); |
| 428 | 3679 level = XCAR (XCDR (this_warning)); |
| 3680 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3681 free_list (this_warning); | |
| 3682 | |
| 3683 if (NILP (Vpending_warnings)) | |
| 3684 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3685 but safer */ | |
| 3686 | |
| 1204 | 3687 GCPRO4 (form, class_, level, messij); |
| 428 | 3688 if (!STRINGP (messij)) |
| 3689 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3690 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3691 UNGCPRO; |
| 771 | 3692 unbind_to (speccount); |
| 428 | 3693 } |
| 3694 | |
| 3695 QUIT; | |
| 814 | 3696 if (need_to_garbage_collect) |
| 428 | 3697 { |
| 3698 struct gcpro gcpro1; | |
| 3699 GCPRO1 (form); | |
| 3092 | 3700 #ifdef NEW_GC |
| 3701 gc_incremental (); | |
| 3702 #else /* not NEW_GC */ | |
| 428 | 3703 garbage_collect_1 (); |
| 3092 | 3704 #endif /* not NEW_GC */ |
| 428 | 3705 UNGCPRO; |
| 3706 } | |
| 3707 | |
| 3708 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3709 { | |
| 3710 if (max_lisp_eval_depth < 100) | |
| 3711 max_lisp_eval_depth = 100; | |
| 3712 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3713 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3714 Qunbound); | |
| 428 | 3715 } |
| 3716 | |
| 3717 /* We guaranteed CONSP (form) above */ | |
| 3718 original_fun = XCAR (form); | |
| 3719 original_args = XCDR (form); | |
| 3720 | |
| 3721 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3722 | |
| 3723 backtrace.pdlcount = specpdl_depth(); | |
| 3724 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3725 backtrace.args = &original_args; | |
| 3726 backtrace.nargs = UNEVALLED; | |
| 3727 backtrace.evalargs = 1; | |
| 3728 backtrace.debug_on_exit = 0; | |
| 1292 | 3729 backtrace.function_being_called = 0; |
| 428 | 3730 PUSH_BACKTRACE (backtrace); |
| 3731 | |
| 3732 if (debug_on_next_call) | |
| 3733 do_debug_on_call (Qt); | |
| 3734 | |
| 3735 /* At this point, only original_fun and original_args | |
| 3736 have values that will be used below. */ | |
| 3737 retry: | |
| 3989 | 3738 /* Optimise for no indirection. */ |
| 3739 fun = original_fun; | |
| 3740 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3741 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3742 { | |
| 3743 fun = indirect_function(original_fun, 1); | |
| 3744 } | |
| 428 | 3745 |
| 3746 if (SUBRP (fun)) | |
| 3747 { | |
| 3748 Lisp_Subr *subr = XSUBR (fun); | |
| 3749 int max_args = subr->max_args; | |
| 3750 | |
| 3751 if (nargs < subr->min_args) | |
| 3752 goto wrong_number_of_arguments; | |
| 3753 | |
| 3754 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3755 { | |
| 3756 backtrace.evalargs = 0; | |
| 1292 | 3757 PROFILE_ENTER_FUNCTION (); |
| 428 | 3758 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3759 (original_args)); | |
| 1292 | 3760 PROFILE_EXIT_FUNCTION (); |
| 428 | 3761 } |
| 3762 else if (nargs <= max_args) | |
| 3763 { | |
| 3764 struct gcpro gcpro1; | |
| 3765 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3766 REGISTER Lisp_Object *p = args; | |
| 3767 | |
| 3768 GCPRO1 (args[0]); | |
| 3769 gcpro1.nvars = 0; | |
| 3770 | |
| 3771 { | |
| 3772 LIST_LOOP_2 (arg, original_args) | |
| 3773 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3774 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3775 gcpro1.nvars++; |
| 3776 } | |
| 3777 } | |
| 3778 | |
| 3779 /* &optional args default to nil. */ | |
| 3780 while (p - args < max_args) | |
| 3781 *p++ = Qnil; | |
| 3782 | |
| 3783 backtrace.args = args; | |
| 3784 backtrace.nargs = nargs; | |
| 3785 | |
| 1292 | 3786 PROFILE_ENTER_FUNCTION (); |
| 428 | 3787 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3788 PROFILE_EXIT_FUNCTION (); |
| 428 | 3789 |
| 3790 UNGCPRO; | |
| 3791 } | |
| 3792 else if (max_args == MANY) | |
| 3793 { | |
| 3794 /* Pass a vector of evaluated arguments */ | |
| 3795 struct gcpro gcpro1; | |
| 3796 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3797 REGISTER Lisp_Object *p = args; | |
| 3798 | |
| 3799 GCPRO1 (args[0]); | |
| 3800 gcpro1.nvars = 0; | |
| 3801 | |
| 3802 { | |
| 3803 LIST_LOOP_2 (arg, original_args) | |
| 3804 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3805 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3806 gcpro1.nvars++; |
| 3807 } | |
| 3808 } | |
| 3809 | |
| 3810 backtrace.args = args; | |
| 3811 backtrace.nargs = nargs; | |
| 3812 | |
| 1292 | 3813 PROFILE_ENTER_FUNCTION (); |
| 428 | 3814 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3815 (nargs, args)); | |
| 1292 | 3816 PROFILE_EXIT_FUNCTION (); |
| 428 | 3817 |
| 3818 UNGCPRO; | |
| 3819 } | |
| 3820 else | |
| 3821 { | |
| 3822 wrong_number_of_arguments: | |
| 440 | 3823 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3824 } |
| 3825 } | |
| 3826 else if (COMPILED_FUNCTIONP (fun)) | |
| 3827 { | |
| 3828 struct gcpro gcpro1; | |
| 3829 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3830 REGISTER Lisp_Object *p = args; | |
| 3831 | |
| 3832 GCPRO1 (args[0]); | |
| 3833 gcpro1.nvars = 0; | |
| 3834 | |
| 3835 { | |
| 3836 LIST_LOOP_2 (arg, original_args) | |
| 3837 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3838 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3839 gcpro1.nvars++; |
| 3840 } | |
| 3841 } | |
| 3842 | |
| 3843 backtrace.args = args; | |
| 3844 backtrace.nargs = nargs; | |
| 3845 backtrace.evalargs = 0; | |
| 3846 | |
| 1292 | 3847 PROFILE_ENTER_FUNCTION (); |
| 428 | 3848 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3849 PROFILE_EXIT_FUNCTION (); |
| 428 | 3850 |
| 3851 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3852 if (backtrace.debug_on_exit) | |
| 3853 val = do_debug_on_exit (val); | |
| 3854 /* Don't do it again when we return to eval. */ | |
| 3855 backtrace.debug_on_exit = 0; | |
| 3856 | |
| 3857 UNGCPRO; | |
| 3858 } | |
| 3859 else if (CONSP (fun)) | |
| 3860 { | |
| 3861 Lisp_Object funcar = XCAR (fun); | |
| 3862 | |
| 3863 if (EQ (funcar, Qautoload)) | |
| 3864 { | |
| 970 | 3865 /* do_autoload GCPROs both arguments */ |
| 428 | 3866 do_autoload (fun, original_fun); |
| 3867 goto retry; | |
| 3868 } | |
| 3869 else if (EQ (funcar, Qmacro)) | |
| 3870 { | |
| 1292 | 3871 PROFILE_ENTER_FUNCTION (); |
| 428 | 3872 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3873 PROFILE_EXIT_FUNCTION (); |
| 428 | 3874 } |
| 3875 else if (EQ (funcar, Qlambda)) | |
| 3876 { | |
| 3877 struct gcpro gcpro1; | |
| 3878 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3879 REGISTER Lisp_Object *p = args; | |
| 3880 | |
| 3881 GCPRO1 (args[0]); | |
| 3882 gcpro1.nvars = 0; | |
| 3883 | |
| 3884 { | |
| 3885 LIST_LOOP_2 (arg, original_args) | |
| 3886 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3887 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3888 gcpro1.nvars++; |
| 3889 } | |
| 3890 } | |
| 3891 | |
| 3892 UNGCPRO; | |
| 3893 | |
| 3894 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3895 backtrace.nargs = nargs; | |
| 3896 backtrace.evalargs = 0; | |
| 3897 | |
| 1292 | 3898 PROFILE_ENTER_FUNCTION (); |
| 428 | 3899 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3900 PROFILE_EXIT_FUNCTION (); |
| 428 | 3901 |
| 3902 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3903 if (backtrace.debug_on_exit) | |
| 3904 val = do_debug_on_exit (val); | |
| 3905 /* Don't do it again when we return to eval. */ | |
| 3906 backtrace.debug_on_exit = 0; | |
| 3907 } | |
| 3908 else | |
| 3909 { | |
| 3910 goto invalid_function; | |
| 3911 } | |
| 3912 } | |
| 4104 | 3913 else if (UNBOUNDP (fun)) |
| 3914 { | |
| 3915 val = signal_void_function_error (original_fun); | |
| 3916 } | |
| 3917 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3918 UNBOUNDP (fun)) */ | |
| 428 | 3919 { |
| 3920 invalid_function: | |
| 436 | 3921 val = signal_invalid_function_error (fun); |
| 428 | 3922 } |
| 3923 | |
| 3924 lisp_eval_depth--; | |
| 3925 if (backtrace.debug_on_exit) | |
| 3926 val = do_debug_on_exit (val); | |
| 3927 POP_BACKTRACE (backtrace); | |
| 3928 return val; | |
| 3929 } | |
| 3930 | |
| 3931 | |
| 1111 | 3932 |
| 3933 static void | |
| 3934 run_post_gc_hook (void) | |
| 3935 { | |
| 3936 Lisp_Object args[2]; | |
| 3937 | |
| 3938 args[0] = Qpost_gc_hook; | |
| 3939 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3940 | |
| 3941 run_hook_with_args_trapping_problems | |
| 1333 | 3942 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3943 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3944 } | |
| 3945 | |
| 428 | 3946 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /* |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3947 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 3948 Thus, (funcall 'cons 'x 'y) returns (x . y). |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3949 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3950 arguments: (FUNCTION &rest ARGS) |
| 428 | 3951 */ |
| 3952 (int nargs, Lisp_Object *args)) | |
| 3953 { | |
| 3954 /* This function can GC */ | |
| 3955 Lisp_Object fun; | |
| 3956 Lisp_Object val; | |
| 4162 | 3957 PROFILE_DECLARE(); |
| 428 | 3958 int fun_nargs = nargs - 1; |
| 3959 Lisp_Object *fun_args = args + 1; | |
| 3960 | |
| 1318 | 3961 /* QUIT will check for proper redisplay wrapping */ |
| 3962 | |
| 428 | 3963 QUIT; |
| 851 | 3964 |
| 3965 if (funcall_allocation_flag) | |
| 3966 { | |
| 3967 if (need_to_garbage_collect) | |
| 3968 /* Callers should gcpro lexpr args */ | |
| 3092 | 3969 #ifdef NEW_GC |
| 3970 gc_incremental (); | |
| 3971 #else /* not NEW_GC */ | |
| 851 | 3972 garbage_collect_1 (); |
| 3092 | 3973 #endif /* not NEW_GC */ |
| 851 | 3974 if (need_to_check_c_alloca) |
| 3975 { | |
| 3976 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 3977 { | |
| 3978 xemacs_c_alloca (0); | |
| 3979 funcall_alloca_count = 0; | |
| 3980 } | |
| 3981 } | |
| 887 | 3982 if (need_to_signal_post_gc) |
| 3983 { | |
| 3984 need_to_signal_post_gc = 0; | |
| 1111 | 3985 recompute_funcall_allocation_flag (); |
| 3263 | 3986 #ifdef NEW_GC |
| 3987 run_finalizers (); | |
| 3988 #endif /* NEW_GC */ | |
| 1111 | 3989 run_post_gc_hook (); |
| 887 | 3990 } |
| 851 | 3991 } |
| 428 | 3992 |
| 3993 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3994 { | |
| 3995 if (max_lisp_eval_depth < 100) | |
| 3996 max_lisp_eval_depth = 100; | |
| 3997 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3998 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3999 Qunbound); | |
| 428 | 4000 } |
| 4001 | |
| 1292 | 4002 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4003 backtrace.function = &args[0]; |
| 4004 backtrace.args = fun_args; | |
| 4005 backtrace.nargs = fun_nargs; | |
| 4006 backtrace.evalargs = 0; | |
| 4007 backtrace.debug_on_exit = 0; | |
| 1292 | 4008 backtrace.function_being_called = 0; |
| 428 | 4009 PUSH_BACKTRACE (backtrace); |
| 4010 | |
| 4011 if (debug_on_next_call) | |
| 4012 do_debug_on_call (Qlambda); | |
| 4013 | |
| 4014 retry: | |
| 4015 | |
| 4016 fun = args[0]; | |
| 4017 | |
| 4018 /* We could call indirect_function directly, but profiling shows | |
| 4019 this is worth optimizing by partially unrolling the loop. */ | |
| 4020 if (SYMBOLP (fun)) | |
| 4021 { | |
| 4022 fun = XSYMBOL (fun)->function; | |
| 4023 if (SYMBOLP (fun)) | |
| 4024 { | |
| 4025 fun = XSYMBOL (fun)->function; | |
| 4026 if (SYMBOLP (fun)) | |
| 4027 fun = indirect_function (fun, 1); | |
| 4028 } | |
| 4029 } | |
| 4030 | |
| 4031 if (SUBRP (fun)) | |
| 4032 { | |
| 4033 Lisp_Subr *subr = XSUBR (fun); | |
| 4034 int max_args = subr->max_args; | |
| 4035 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4036 | |
| 4037 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4038 { | |
| 4039 funcall_subr: | |
| 1292 | 4040 PROFILE_ENTER_FUNCTION (); |
| 428 | 4041 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4042 PROFILE_EXIT_FUNCTION (); |
| 428 | 4043 } |
| 436 | 4044 else if (fun_nargs < subr->min_args) |
| 4045 { | |
| 4046 goto wrong_number_of_arguments; | |
| 4047 } | |
| 428 | 4048 else if (fun_nargs < max_args) |
| 4049 { | |
| 4050 Lisp_Object *p = spacious_args; | |
| 4051 | |
| 4052 /* Default optionals to nil */ | |
| 4053 while (fun_nargs--) | |
| 4054 *p++ = *fun_args++; | |
| 4055 while (p - spacious_args < max_args) | |
| 4056 *p++ = Qnil; | |
| 4057 | |
| 4058 fun_args = spacious_args; | |
| 4059 goto funcall_subr; | |
| 4060 } | |
| 4061 else if (max_args == MANY) | |
| 4062 { | |
| 1292 | 4063 PROFILE_ENTER_FUNCTION (); |
| 436 | 4064 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4065 PROFILE_EXIT_FUNCTION (); |
| 428 | 4066 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4067 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4068 { |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4069 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4070 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4071 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4072 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4073 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4074 } |
| 428 | 4075 goto invalid_function; |
| 4076 } | |
| 4077 else | |
| 4078 { | |
| 4079 wrong_number_of_arguments: | |
| 436 | 4080 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4081 } |
| 4082 } | |
| 4083 else if (COMPILED_FUNCTIONP (fun)) | |
| 4084 { | |
| 1292 | 4085 PROFILE_ENTER_FUNCTION (); |
| 428 | 4086 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4087 PROFILE_EXIT_FUNCTION (); |
| 428 | 4088 } |
| 4089 else if (CONSP (fun)) | |
| 4090 { | |
| 4091 Lisp_Object funcar = XCAR (fun); | |
| 4092 | |
| 4093 if (EQ (funcar, Qlambda)) | |
| 4094 { | |
| 1292 | 4095 PROFILE_ENTER_FUNCTION (); |
| 428 | 4096 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4097 PROFILE_EXIT_FUNCTION (); |
| 428 | 4098 } |
| 4099 else if (EQ (funcar, Qautoload)) | |
| 4100 { | |
| 970 | 4101 /* do_autoload GCPROs both arguments */ |
| 428 | 4102 do_autoload (fun, args[0]); |
| 4103 goto retry; | |
| 4104 } | |
| 4105 else /* Can't funcall a macro */ | |
| 4106 { | |
| 4107 goto invalid_function; | |
| 4108 } | |
| 4109 } | |
| 4110 else if (UNBOUNDP (fun)) | |
| 4111 { | |
| 436 | 4112 val = signal_void_function_error (args[0]); |
| 428 | 4113 } |
| 4114 else | |
| 4115 { | |
| 4116 invalid_function: | |
| 436 | 4117 val = signal_invalid_function_error (fun); |
| 428 | 4118 } |
| 4119 | |
| 4120 lisp_eval_depth--; | |
| 4121 if (backtrace.debug_on_exit) | |
| 4122 val = do_debug_on_exit (val); | |
| 4123 POP_BACKTRACE (backtrace); | |
| 4124 return val; | |
| 4125 } | |
| 4126 | |
| 4127 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4128 Return t if OBJECT can be called as a function, else nil. | |
| 4129 A function is an object that can be applied to arguments, | |
| 4130 using for example `funcall' or `apply'. | |
| 4131 */ | |
| 4132 (object)) | |
| 4133 { | |
| 4134 if (SYMBOLP (object)) | |
| 4135 object = indirect_function (object, 0); | |
| 4136 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4137 if (COMPILED_FUNCTIONP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4138 || (SUBRP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4139 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4140 return Qt; |
| 4141 if (CONSP (object)) | |
| 4142 { | |
| 4143 Lisp_Object car = XCAR (object); | |
| 4144 if (EQ (car, Qlambda)) | |
| 4145 return Qt; | |
| 4146 if (EQ (car, Qautoload) | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4147 && NILP (Fcar_safe (Fcdr_safe(Fcdr_safe |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4148 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4149 return Qt; |
| 4150 } | |
| 4151 return Qnil; | |
| 428 | 4152 } |
| 4153 | |
| 4154 static Lisp_Object | |
| 4155 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4156 { | |
| 4157 Lisp_Object orig_function = function; | |
| 4158 Lisp_Object arglist; | |
| 4159 | |
| 4160 retry: | |
| 4161 | |
| 4162 if (SYMBOLP (function)) | |
| 4163 function = indirect_function (function, 1); | |
| 4164 | |
| 4165 if (SUBRP (function)) | |
| 4166 { | |
| 442 | 4167 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4168 if (function_min_args_p) | |
| 4169 return Fsubr_min_args (function); | |
| 4170 else | |
| 4171 return Fsubr_max_args (function); | |
| 428 | 4172 } |
| 4173 else if (COMPILED_FUNCTIONP (function)) | |
| 4174 { | |
| 814 | 4175 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4176 | |
| 1737 | 4177 if (!OPAQUEP (f->instructions)) |
| 4178 /* Lazily munge the instructions into a more efficient form */ | |
| 4179 /* Needed to set max_args */ | |
| 4180 optimize_compiled_function (function); | |
| 4181 | |
| 814 | 4182 if (function_min_args_p) |
| 4183 return make_int (f->min_args); | |
| 4184 else if (f->max_args == MANY) | |
| 4185 return Qnil; | |
| 4186 else | |
| 4187 return make_int (f->max_args); | |
| 428 | 4188 } |
| 4189 else if (CONSP (function)) | |
| 4190 { | |
| 4191 Lisp_Object funcar = XCAR (function); | |
| 4192 | |
| 4193 if (EQ (funcar, Qmacro)) | |
| 4194 { | |
| 4195 function = XCDR (function); | |
| 4196 goto retry; | |
| 4197 } | |
| 4198 else if (EQ (funcar, Qautoload)) | |
| 4199 { | |
| 970 | 4200 /* do_autoload GCPROs both arguments */ |
| 428 | 4201 do_autoload (function, orig_function); |
| 442 | 4202 function = orig_function; |
| 428 | 4203 goto retry; |
| 4204 } | |
| 4205 else if (EQ (funcar, Qlambda)) | |
| 4206 { | |
| 4207 arglist = Fcar (XCDR (function)); | |
| 4208 } | |
| 4209 else | |
| 4210 { | |
| 4211 goto invalid_function; | |
| 4212 } | |
| 4213 } | |
| 4214 else | |
| 4215 { | |
| 4216 invalid_function: | |
| 442 | 4217 return signal_invalid_function_error (orig_function); |
| 428 | 4218 } |
| 4219 | |
| 4220 { | |
| 4221 int argcount = 0; | |
| 4222 | |
| 4223 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4224 { | |
| 4225 if (EQ (arg, Qand_optional)) | |
| 4226 { | |
| 4227 if (function_min_args_p) | |
| 4228 break; | |
| 4229 } | |
| 4230 else if (EQ (arg, Qand_rest)) | |
| 4231 { | |
| 4232 if (function_min_args_p) | |
| 4233 break; | |
| 4234 else | |
| 4235 return Qnil; | |
| 4236 } | |
| 4237 else | |
| 4238 { | |
| 4239 argcount++; | |
| 4240 } | |
| 4241 } | |
| 4242 | |
| 4243 return make_int (argcount); | |
| 4244 } | |
| 4245 } | |
| 4246 | |
| 4247 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4248 Return the minimum number of arguments a function may be called with. |
| 428 | 4249 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4250 any special operator, or any macro. |
| 853 | 4251 |
| 4252 To check if a function can be called with a specified number of | |
| 4253 arguments, use `function-allows-args'. | |
| 428 | 4254 */ |
| 4255 (function)) | |
| 4256 { | |
| 4257 return function_argcount (function, 1); | |
| 4258 } | |
| 4259 | |
| 4260 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4261 Return the maximum number of arguments a function may be called with. |
| 428 | 4262 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4263 any special operator, or any macro. |
| 428 | 4264 If the function takes an arbitrary number of arguments or is |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4265 a built-in special operator, nil is returned. |
| 853 | 4266 |
| 4267 To check if a function can be called with a specified number of | |
| 4268 arguments, use `function-allows-args'. | |
| 428 | 4269 */ |
| 4270 (function)) | |
| 4271 { | |
| 4272 return function_argcount (function, 0); | |
| 4273 } | |
| 4274 | |
| 4275 | |
| 4276 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4277 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4278 Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4279 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4280 arguments: (FUNCTION &rest ARGS) |
| 428 | 4281 */ |
| 4282 (int nargs, Lisp_Object *args)) | |
| 4283 { | |
| 4284 /* This function can GC */ | |
| 4285 Lisp_Object fun = args[0]; | |
| 4286 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4287 int numargs; | |
| 4288 int funcall_nargs; | |
| 4289 | |
| 4290 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4291 | |
| 4292 if (numargs == 0) | |
| 4293 /* (apply foo 0 1 '()) */ | |
| 4294 return Ffuncall (nargs - 1, args); | |
| 4295 else if (numargs == 1) | |
| 4296 { | |
| 4297 /* (apply foo 0 1 '(2)) */ | |
| 4298 args [nargs - 1] = XCAR (spread_arg); | |
| 4299 return Ffuncall (nargs, args); | |
| 4300 } | |
| 4301 | |
| 4302 /* -1 for function, -1 for spread arg */ | |
| 4303 numargs = nargs - 2 + numargs; | |
| 4304 /* +1 for function */ | |
| 4305 funcall_nargs = 1 + numargs; | |
| 4306 | |
| 4307 if (SYMBOLP (fun)) | |
| 4308 fun = indirect_function (fun, 0); | |
| 4309 | |
| 4310 if (SUBRP (fun)) | |
| 4311 { | |
| 4312 Lisp_Subr *subr = XSUBR (fun); | |
| 4313 int max_args = subr->max_args; | |
| 4314 | |
| 4315 if (numargs < subr->min_args | |
| 4316 || (max_args >= 0 && max_args < numargs)) | |
| 4317 { | |
| 4318 /* Let funcall get the error */ | |
| 4319 } | |
| 4320 else if (max_args > numargs) | |
| 4321 { | |
| 4322 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4323 by explicitly supplying nil's for optional values */ | |
| 4324 funcall_nargs += (max_args - numargs); | |
| 4325 } | |
| 4326 } | |
| 4327 else if (UNBOUNDP (fun)) | |
| 4328 { | |
| 4329 /* Let funcall get the error */ | |
| 4330 fun = args[0]; | |
| 4331 } | |
| 4332 | |
| 4333 { | |
| 4334 REGISTER int i; | |
| 4335 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4336 struct gcpro gcpro1; | |
| 4337 | |
| 4338 GCPRO1 (*funcall_args); | |
| 4339 gcpro1.nvars = funcall_nargs; | |
| 4340 | |
| 4341 /* Copy in the unspread args */ | |
| 4342 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4343 /* Spread the last arg we got. Its first element goes in | |
| 4344 the slot that it used to occupy, hence this value of I. */ | |
| 4345 for (i = nargs - 1; | |
| 4346 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4347 i++, spread_arg = XCDR (spread_arg)) | |
| 4348 { | |
| 4349 funcall_args [i] = XCAR (spread_arg); | |
| 4350 } | |
| 4351 /* Supply nil for optional args (to subrs) */ | |
| 4352 for (; i < funcall_nargs; i++) | |
| 4353 funcall_args[i] = Qnil; | |
| 4354 | |
| 4355 | |
| 4356 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4357 } | |
| 4358 } | |
| 4359 | |
| 4360 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4361 return the result of evaluation. */ | |
| 4362 | |
| 4363 static Lisp_Object | |
| 4364 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4365 { | |
| 4366 /* This function can GC */ | |
| 442 | 4367 Lisp_Object arglist, body, tail; |
| 428 | 4368 int speccount = specpdl_depth(); |
| 4369 REGISTER int i = 0; | |
| 4370 | |
| 4371 tail = XCDR (fun); | |
| 4372 | |
| 4373 if (!CONSP (tail)) | |
| 4374 goto invalid_function; | |
| 4375 | |
| 4376 arglist = XCAR (tail); | |
| 4377 body = XCDR (tail); | |
| 4378 | |
| 4379 { | |
| 4380 int optional = 0, rest = 0; | |
| 4381 | |
| 442 | 4382 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4383 { |
| 4384 if (!SYMBOLP (symbol)) | |
| 4385 goto invalid_function; | |
| 4386 if (EQ (symbol, Qand_rest)) | |
| 4387 rest = 1; | |
| 4388 else if (EQ (symbol, Qand_optional)) | |
| 4389 optional = 1; | |
| 4390 else if (rest) | |
| 4391 { | |
| 4392 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4393 i = nargs; | |
| 4394 } | |
| 4395 else if (i < nargs) | |
| 4396 specbind (symbol, args[i++]); | |
| 4397 else if (!optional) | |
| 4398 goto wrong_number_of_arguments; | |
| 4399 else | |
| 4400 specbind (symbol, Qnil); | |
| 4401 } | |
| 4402 } | |
| 4403 | |
| 4404 if (i < nargs) | |
| 4405 goto wrong_number_of_arguments; | |
| 4406 | |
| 771 | 4407 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4408 |
| 4409 wrong_number_of_arguments: | |
| 436 | 4410 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4411 |
| 4412 invalid_function: | |
| 436 | 4413 return signal_invalid_function_error (fun); |
| 428 | 4414 } |
| 4415 | |
| 4416 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4417 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4418 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4419 A multiple value object is returned by #'values if: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4420 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4421 -- The number of arguments to #'values is not one, and: |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4422 -- Some special operator in the call stack is prepared to handle more than |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4423 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4424 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4425 The return value of #'values-list is analogous to that of #'values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4426 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4427 Henry Baker, in https://eprints.kfupm.edu.sa/31898/1/31898.pdf ("CONS |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4428 Should not CONS its Arguments, or, a Lazy Alloc is a Smart Alloc", ACM |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4429 Sigplan Notices 27,3 (March 1992),24-34.) says it should be possible to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4430 allocate Common Lisp multiple-value objects on the stack, but this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4431 assumes that variable-length records can be allocated on the stack, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4432 something not true for us. As far as I can tell, it also ignores the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4433 contexts where multiple-values need to be thrown, or maybe it thinks such |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4434 objects should be converted to heap allocation at that point. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4435 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4436 The specific multiple values saved and returned depend on how many |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4437 multiple-values special operators in the stack are interested in; for |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4438 example, if #'multiple-value-call is somewhere in the call stack, all |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4439 values passed to #'values will be saved and returned. If an expansion of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4440 #'multiple-value-setq with 10 SYMS is the only part of the call stack |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4441 interested in multiple values, then a maximum of ten multiple values will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4442 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4443 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4444 (#'throw passes back multiple values in its VALUE argument; this is why |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4445 we can't just take the details of the most immediate |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4446 #'multiple-value-{whatever} call to work out which values to save, we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4447 need to look at the whole stack, or, equivalently, the dynamic variables |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4448 we set to reflect the whole stack.) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4449 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4450 The first value passed to #'values will always be saved, since that is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4451 needed to convert a multiple value object into a single value object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4452 something that is normally necessary independent of how many functions in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4453 the call stack are interested in multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4454 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4455 However many values (for values of "however many" that are not one) are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4456 saved and restored, the multiple value object knows how many arguments it |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4457 would contain were none to have been discarded, and will indicate this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4458 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4459 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4460 In lisp-interaction-mode, no multiple values should be discarded (unless |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4461 they need to be for the sake of the correctness of the program); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4462 #'eval-interactive-with-multiple-value-list in lisp-mode.el wraps its |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4463 #'eval calls with #'multiple-value-list calls to avoid this. This means |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4464 that there is a small performance and memory penalty for code evaluated |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4465 in *scratch*; use M-: EXPRESSION RET if you really need to avoid |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4466 this. Lisp code execution that is not ultimately from hitting C-j in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4467 *scratch*--that is, the vast vast majority of Lisp code execution--does |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4468 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4469 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4470 Probably the most important aspect of multiple values is stated with |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4471 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4472 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4473 "No matter how many values a form produces, if the form is an argument |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4474 form in a function call, then exactly one value (the first one) is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4475 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4476 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4477 This means that most contexts, most of the time, will never see multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4478 values. There are important exceptions; search the web for that text in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4479 quotation marks and read the related chapter. This code handles all of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4480 them, to my knowledge. Aidan Kehoe, Mon Mar 16 00:17:39 GMT 2009. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4481 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4482 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4483 make_multiple_value (Lisp_Object first_value, Elemcount count, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4484 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4485 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4486 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4487 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4488 Elemcount i, allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4489 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4490 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4492 if (1 != upper_limit && (0 == first_desired)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4494 /* We always allocate element zero, and that's taken into account when |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4495 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4496 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4497 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4499 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4500 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4501 /* We can't pass anything back that our caller is interested in. Only |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4502 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4503 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4504 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4505 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4506 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 allocated_count = 1 + ((upper_limit > count ? count : upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4508 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4509 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4511 sizem = FLEXIBLE_ARRAY_STRUCT_SIZEOF (multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 contents, allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 mv = (multiple_value *) BASIC_ALLOC_LCRECORD (sizem, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4515 &lrecord_multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4517 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4518 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4519 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4521 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4522 for (i = first_desired; i < upper_limit && i < count; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4523 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 mv->contents[1 + (i - first_desired)] = Qunbound; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 return wrap_multiple_value (mv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4530 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 multiple_value_aset (Lisp_Object obj, Elemcount index, Lisp_Object value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4532 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4533 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4534 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4535 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4536 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4537 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4539 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4541 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4544 mv->contents[index == 0 ? 0 : 1 + (index - first_desired)] = value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4546 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4547 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4548 multiple_value_aref (Lisp_Object obj, Elemcount index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4551 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4553 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4556 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4557 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4558 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4560 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 return mv->contents[index == 0 ? 0 : 1 + (index - first_desired)]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 print_multiple_value (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4566 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4570 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4573 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 printing_unreadable_object ("multiple values"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4575 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 if (0 == count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 { |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
4579 write_msg_string (printcharfun, "#<zero-length multiple value>"); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4583 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 index >= (first_desired + (allocated_count - 1)))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 write_fmt_string (printcharfun, "#<discarded-multiple-value %d>", |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4590 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4592 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 print_internal (multiple_value_aref (obj, index), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4597 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 { |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
4601 write_ascstring (printcharfun, " ;\n"); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4603 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4605 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4606 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 Elemcount index, allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4612 for (index = 0; index < allocated_count; ++index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4618 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4620 static Bytecount |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 size_multiple_value (const void *lheader) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4623 return FLEXIBLE_ARRAY_STRUCT_SIZEOF (struct multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 Lisp_Object, contents, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 ((struct multiple_value *) lheader)-> |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4629 static const struct memory_description multiple_value_description[] = { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4630 { XD_LONG, offsetof (struct multiple_value, count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 { XD_ELEMCOUNT, offsetof (struct multiple_value, allocated_count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 { XD_LONG, offsetof (struct multiple_value, first_desired) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 { XD_LISP_OBJECT_ARRAY, offsetof (struct multiple_value, contents), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4635 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4636 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("multiple-value", multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 1, /*dumpable-flag*/ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 mark_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4641 print_multiple_value, 0, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 0, /* No equal method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 0, /* No hash method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 multiple_value_description, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4645 size_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 struct multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4647 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 /* Given that FIRST and UPPER are the inclusive lower and exclusive upper |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 bounds for the multiple values we're interested in, modify (or don't) the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 special variables used to indicate this to #'values and #'values-list. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 Returns the specpdl_depth() value before any modification. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 bind_multiple_value_limits (int first, int upper) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4654 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4655 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 if (!(upper > first)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 invalid_argument ("MULTIPLE-VALUE-UPPER-LIMIT must be greater than " |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4664 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 args_out_of_range (make_int (upper), make_int (Vmultiple_values_limit)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 /* In the event that something back up the stack wants more multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 values than we do, we need to keep its figures for |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 first_desired_multiple_value or multiple_value_current_limit both. It |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4671 may be that the form will throw past us. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4673 If first_desired_multiple_value is zero, this means it hasn't ever been |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 bound, and any value we have for first is appropriate to use. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 Zeroth element is always saved, no need to note that: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 if (0 == first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4678 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4679 first = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4680 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4685 internal_bind_int (&first_desired_multiple_value, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4690 internal_bind_int (&multiple_value_current_limit, upper); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4691 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4693 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4696 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4697 multiple_value_call (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4698 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4699 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4700 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4701 Lisp_Object result = Qnil, head = Fcons (args[0], Qnil), list_offset; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4702 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4704 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4708 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4709 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4710 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4711 /* Start at 4, to ignore the function, the speccount, and the arguments to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 multiple-values-limit (which we don't discard because |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4714 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4715 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4719 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 Elemcount i, count = XMULTIPLE_VALUE_COUNT (result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 for (i = 0; i < count; i++) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 val = multiple_value_aref (result, i); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4725 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4727 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4728 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4735 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4736 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4738 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4742 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 RETURN_UNGCPRO (Fapply (countof(apply_args), apply_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4746 DEFUN ("multiple-value-call", Fmultiple_value_call, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4747 Call FUNCTION with arguments FORMS, using multiple values when returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4748 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 All of the (possibly multiple) values returned by each form in FORMS are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 gathered together, and given as arguments to FUNCTION; conceptually, this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 function is a version of `apply' that by-passes the multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 infrastructure, treating multiple values as intercalated lists. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4754 arguments: (FUNCTION &rest FORMS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4756 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 constructed_args = alloca_array (Lisp_Object, listcount + 3); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 /* Fcar so we error on non-cons: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 constructed_args[i] = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4768 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4771 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4774 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 constructed_args[i] = make_int (Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 speccount = bind_multiple_value_limits (0, Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4780 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4782 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4787 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 RETURN_UNGCPRO (multiple_value_call (listcount + 3, constructed_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 multiple_value_list_internal (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 int first = XINT (args[0]), upper = XINT (args[1]), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 result = args[3]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4808 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4809 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4811 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4817 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4818 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4823 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 if (first == 0) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4834 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4835 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 DEFUN ("multiple-value-list-internal", Fmultiple_value_list_internal, 3, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 Evaluate FORM. Return a list of multiple vals reflecting the other two args. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 Don't use this. Use `multiple-value-list', the macro specified by Common |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4843 FIRST-DESIRED-MULTIPLE-VALUE is the first element in list of multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 to pass back. MULTIPLE-VALUE-UPPER-LIMIT is the exclusive upper limit on |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 the indexes within the values that may be passed back; this function will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 never return a list longer than MULTIPLE-VALUE-UPPER-LIMIT - |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 FIRST-DESIRED-MULTIPLE-VALUE. It may return a list shorter than that, if |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 `values' or `values-list' do not supply enough elements. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4849 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 arguments: (FIRST-DESIRED-MULTIPLE-VALUE MULTIPLE-VALUE-UPPER-LIMIT FORM) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4851 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4855 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4858 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4859 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4860 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4861 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4862 list2 (Qmultiple_value_list_internal, make_int (nargs))); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4863 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4864 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 argv[0] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 first = XINT (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4872 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4875 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 /* The unintuitive order of things here is for the sake of the bytecode; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4880 the alternative would be to encode the number of arguments in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 bytecode stream, which complicates things if we have more than 255 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 argv[2] = make_int (bind_multiple_value_limits (first, upper)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4887 /* GCPROing in this function is not strictly necessary, this Feval is the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 only point that may cons up data that is not immediately discarded, and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 within it is the only point (in Fmultiple_value_list_internal and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 multiple_value_list) that we can garbage collect. But I'm conservative, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4891 and this function is called so rarely (only from interpreted code) that |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4893 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 RETURN_UNGCPRO (multiple_value_list_internal (countof (argv), argv)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4897 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 DEFUN ("multiple-value-prog1", Fmultiple_value_prog1, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 Similar to `prog1', but return any multiple values from the first form. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 `prog1' itself will never return multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4904 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4905 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4906 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4907 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4909 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4910 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4916 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4918 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4924 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4927 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4931 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4933 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 if (1 == nargs || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4936 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4937 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 /* If nargs is zero, this code is correct and desirable. With |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4940 #'multiple-value-call, we want zero-length multiple values in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4941 argument list to be discarded entirely, and we can't do this if we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4942 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 result = make_multiple_value (nargs ? args[0] : Qnil, nargs, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4944 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4945 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4946 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4947 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4948 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4950 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 multiple_value_aset (result, counting, args[counting]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4955 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4956 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4957 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4958 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4959 DEFUN ("values-list", Fvalues_list, 1, 1, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4960 Return all the elements of LIST as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4966 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4969 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4970 if (1 == listcount || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 result = make_multiple_value (Fcar_safe (list), listcount, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4982 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4987 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4988 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4989 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4990 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4996 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4997 values2 (Lisp_Object first, Lisp_Object second) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4998 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4999 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5000 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5004 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5007 |
| 428 | 5008 /************************************************************************/ |
| 5009 /* Run hook variables in various ways. */ | |
| 5010 /************************************************************************/ | |
| 5011 | |
| 5012 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5013 Run each hook in HOOKS. Major mode functions use this. | |
| 5014 Each argument should be a symbol, a hook variable. | |
| 5015 These symbols are processed in the order specified. | |
| 5016 If a hook symbol has a non-nil value, that value may be a function | |
| 5017 or a list of functions to be called to run the hook. | |
| 5018 If the value is a function, it is called with no arguments. | |
| 5019 If it is a list, the elements are called, in order, with no arguments. | |
| 5020 | |
| 5021 To make a hook variable buffer-local, use `make-local-hook', | |
| 5022 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5023 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5024 arguments: (FIRST &rest REST) |
| 428 | 5025 */ |
| 5026 (int nargs, Lisp_Object *args)) | |
| 5027 { | |
| 5028 REGISTER int i; | |
| 5029 | |
| 5030 for (i = 0; i < nargs; i++) | |
| 5031 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5032 | |
| 5033 return Qnil; | |
| 5034 } | |
| 5035 | |
| 5036 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5037 Run HOOK with the specified arguments ARGS. | |
| 5038 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5039 value, that value may be a function or a list of functions to be | |
| 5040 called to run the hook. If the value is a function, it is called with | |
| 5041 the given arguments and its return value is returned. If it is a list | |
| 5042 of functions, those functions are called, in order, | |
| 5043 with the given arguments ARGS. | |
| 444 | 5044 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5045 as that may change. |
| 5046 | |
| 5047 To make a hook variable buffer-local, use `make-local-hook', | |
| 5048 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5049 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5050 arguments: (HOOK &rest ARGS) |
| 428 | 5051 */ |
| 5052 (int nargs, Lisp_Object *args)) | |
| 5053 { | |
| 5054 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5055 } | |
| 5056 | |
| 5057 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5058 Run HOOK with the specified arguments ARGS. | |
| 5059 HOOK should be a symbol, a hook variable. Its value should | |
| 5060 be a list of functions. We call those functions, one by one, | |
| 5061 passing arguments ARGS to each of them, until one of them | |
| 5062 returns a non-nil value. Then we return that value. | |
| 5063 If all the functions return nil, we return nil. | |
| 5064 | |
| 5065 To make a hook variable buffer-local, use `make-local-hook', | |
| 5066 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5067 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5068 arguments: (HOOK &rest ARGS) |
| 428 | 5069 */ |
| 5070 (int nargs, Lisp_Object *args)) | |
| 5071 { | |
| 5072 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5073 } | |
| 5074 | |
| 5075 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5076 Run HOOK with the specified arguments ARGS. | |
| 5077 HOOK should be a symbol, a hook variable. Its value should | |
| 5078 be a list of functions. We call those functions, one by one, | |
| 5079 passing arguments ARGS to each of them, until one of them | |
| 5080 returns nil. Then we return nil. | |
| 5081 If all the functions return non-nil, we return non-nil. | |
| 5082 | |
| 5083 To make a hook variable buffer-local, use `make-local-hook', | |
| 5084 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5085 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5086 arguments: (HOOK &rest ARGS) |
| 428 | 5087 */ |
| 5088 (int nargs, Lisp_Object *args)) | |
| 5089 { | |
| 5090 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5091 } | |
| 5092 | |
| 5093 /* ARGS[0] should be a hook symbol. | |
| 5094 Call each of the functions in the hook value, passing each of them | |
| 5095 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5096 COND specifies a condition to test after each call | |
| 5097 to decide whether to stop. | |
| 5098 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5099 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5100 | |
| 5101 Lisp_Object | |
| 5102 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5103 enum run_hooks_condition cond) | |
| 5104 { | |
| 5105 Lisp_Object sym, val, ret; | |
| 5106 | |
| 5107 if (!initialized || preparing_for_armageddon) | |
| 5108 /* We need to bail out of here pronto. */ | |
| 5109 return Qnil; | |
| 5110 | |
| 3092 | 5111 #ifndef NEW_GC |
| 428 | 5112 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5113 will also be true unless something is really hosed. */ | |
| 5114 assert (!gc_in_progress); | |
| 3092 | 5115 #endif /* not NEW_GC */ |
| 428 | 5116 |
| 5117 sym = args[0]; | |
| 771 | 5118 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5119 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5120 | |
| 5121 if (UNBOUNDP (val) || NILP (val)) | |
| 5122 return ret; | |
| 5123 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5124 { | |
| 5125 args[0] = val; | |
| 5126 return Ffuncall (nargs, args); | |
| 5127 } | |
| 5128 else | |
| 5129 { | |
| 5130 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5131 Lisp_Object globals = Qnil; | |
| 5132 GCPRO3 (sym, val, globals); | |
| 5133 | |
| 5134 for (; | |
| 5135 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5136 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5137 : !NILP (ret))); | |
| 5138 val = XCDR (val)) | |
| 5139 { | |
| 5140 if (EQ (XCAR (val), Qt)) | |
| 5141 { | |
| 5142 /* t indicates this hook has a local binding; | |
| 5143 it means to run the global binding too. */ | |
| 5144 globals = Fdefault_value (sym); | |
| 5145 | |
| 5146 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5147 ! NILP (globals)) | |
| 5148 { | |
| 5149 args[0] = globals; | |
| 5150 ret = Ffuncall (nargs, args); | |
| 5151 } | |
| 5152 else | |
| 5153 { | |
| 5154 for (; | |
| 5155 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5156 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5157 ? NILP (ret) | |
| 5158 : !NILP (ret))); | |
| 5159 globals = XCDR (globals)) | |
| 5160 { | |
| 5161 args[0] = XCAR (globals); | |
| 5162 /* In a global value, t should not occur. If it does, we | |
| 5163 must ignore it to avoid an endless loop. */ | |
| 5164 if (!EQ (args[0], Qt)) | |
| 5165 ret = Ffuncall (nargs, args); | |
| 5166 } | |
| 5167 } | |
| 5168 } | |
| 5169 else | |
| 5170 { | |
| 5171 args[0] = XCAR (val); | |
| 5172 ret = Ffuncall (nargs, args); | |
| 5173 } | |
| 5174 } | |
| 5175 | |
| 5176 UNGCPRO; | |
| 5177 return ret; | |
| 5178 } | |
| 5179 } | |
| 5180 | |
| 5181 Lisp_Object | |
| 5182 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5183 enum run_hooks_condition cond) | |
| 5184 { | |
| 5185 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5186 } | |
| 5187 | |
| 5188 #if 0 | |
| 5189 | |
| 853 | 5190 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5191 |
| 5192 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5193 present value of that symbol. | |
| 5194 Call each element of FUNLIST, | |
| 5195 passing each of them the rest of ARGS. | |
| 5196 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5197 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5198 | |
| 5199 Lisp_Object | |
| 5200 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5201 { | |
| 853 | 5202 omitted; |
| 428 | 5203 } |
| 5204 | |
| 5205 #endif /* 0 */ | |
| 5206 | |
| 5207 void | |
| 5208 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5209 { | |
| 5210 /* This function can GC */ | |
| 5211 struct gcpro gcpro1; | |
| 5212 int i; | |
| 5213 va_list vargs; | |
| 5214 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5215 | |
| 5216 va_start (vargs, nargs); | |
| 5217 funcall_args[0] = hook_var; | |
| 5218 for (i = 0; i < nargs; i++) | |
| 5219 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5220 va_end (vargs); | |
| 5221 | |
| 5222 GCPRO1 (*funcall_args); | |
| 5223 gcpro1.nvars = nargs + 1; | |
| 5224 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5225 UNGCPRO; | |
| 5226 } | |
| 5227 | |
| 5228 void | |
| 5229 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5230 int nargs, ...) | |
| 5231 { | |
| 5232 /* This function can GC */ | |
| 5233 struct gcpro gcpro1; | |
| 5234 int i; | |
| 5235 va_list vargs; | |
| 5236 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5237 | |
| 5238 va_start (vargs, nargs); | |
| 5239 funcall_args[0] = hook_var; | |
| 5240 for (i = 0; i < nargs; i++) | |
| 5241 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5242 va_end (vargs); | |
| 5243 | |
| 5244 GCPRO1 (*funcall_args); | |
| 5245 gcpro1.nvars = nargs + 1; | |
| 5246 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5247 RUN_HOOKS_TO_COMPLETION); | |
| 5248 UNGCPRO; | |
| 5249 } | |
| 5250 | |
| 5251 Lisp_Object | |
| 5252 run_hook (Lisp_Object hook) | |
| 5253 { | |
| 853 | 5254 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5255 } |
| 5256 | |
| 5257 | |
| 5258 /************************************************************************/ | |
| 5259 /* Front-ends to eval, funcall, apply */ | |
| 5260 /************************************************************************/ | |
| 5261 | |
| 5262 /* Apply fn to arg */ | |
| 5263 Lisp_Object | |
| 5264 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5265 { | |
| 5266 /* This function can GC */ | |
| 5267 struct gcpro gcpro1; | |
| 5268 Lisp_Object args[2]; | |
| 5269 | |
| 5270 if (NILP (arg)) | |
| 5271 return Ffuncall (1, &fn); | |
| 5272 GCPRO1 (args[0]); | |
| 5273 gcpro1.nvars = 2; | |
| 5274 args[0] = fn; | |
| 5275 args[1] = arg; | |
| 5276 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5277 } | |
| 5278 | |
| 5279 /* Call function fn on no arguments */ | |
| 5280 Lisp_Object | |
| 5281 call0 (Lisp_Object fn) | |
| 5282 { | |
| 5283 /* This function can GC */ | |
| 5284 struct gcpro gcpro1; | |
| 5285 | |
| 5286 GCPRO1 (fn); | |
| 5287 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5288 } | |
| 5289 | |
| 5290 /* Call function fn with argument arg0 */ | |
| 5291 Lisp_Object | |
| 5292 call1 (Lisp_Object fn, | |
| 5293 Lisp_Object arg0) | |
| 5294 { | |
| 5295 /* This function can GC */ | |
| 5296 struct gcpro gcpro1; | |
| 5297 Lisp_Object args[2]; | |
| 5298 args[0] = fn; | |
| 5299 args[1] = arg0; | |
| 5300 GCPRO1 (args[0]); | |
| 5301 gcpro1.nvars = 2; | |
| 5302 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5303 } | |
| 5304 | |
| 5305 /* Call function fn with arguments arg0, arg1 */ | |
| 5306 Lisp_Object | |
| 5307 call2 (Lisp_Object fn, | |
| 5308 Lisp_Object arg0, Lisp_Object arg1) | |
| 5309 { | |
| 5310 /* This function can GC */ | |
| 5311 struct gcpro gcpro1; | |
| 5312 Lisp_Object args[3]; | |
| 5313 args[0] = fn; | |
| 5314 args[1] = arg0; | |
| 5315 args[2] = arg1; | |
| 5316 GCPRO1 (args[0]); | |
| 5317 gcpro1.nvars = 3; | |
| 5318 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5319 } | |
| 5320 | |
| 5321 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5322 Lisp_Object | |
| 5323 call3 (Lisp_Object fn, | |
| 5324 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5325 { | |
| 5326 /* This function can GC */ | |
| 5327 struct gcpro gcpro1; | |
| 5328 Lisp_Object args[4]; | |
| 5329 args[0] = fn; | |
| 5330 args[1] = arg0; | |
| 5331 args[2] = arg1; | |
| 5332 args[3] = arg2; | |
| 5333 GCPRO1 (args[0]); | |
| 5334 gcpro1.nvars = 4; | |
| 5335 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5336 } | |
| 5337 | |
| 5338 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5339 Lisp_Object | |
| 5340 call4 (Lisp_Object fn, | |
| 5341 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5342 Lisp_Object arg3) | |
| 5343 { | |
| 5344 /* This function can GC */ | |
| 5345 struct gcpro gcpro1; | |
| 5346 Lisp_Object args[5]; | |
| 5347 args[0] = fn; | |
| 5348 args[1] = arg0; | |
| 5349 args[2] = arg1; | |
| 5350 args[3] = arg2; | |
| 5351 args[4] = arg3; | |
| 5352 GCPRO1 (args[0]); | |
| 5353 gcpro1.nvars = 5; | |
| 5354 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5355 } | |
| 5356 | |
| 5357 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5358 Lisp_Object | |
| 5359 call5 (Lisp_Object fn, | |
| 5360 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5361 Lisp_Object arg3, Lisp_Object arg4) | |
| 5362 { | |
| 5363 /* This function can GC */ | |
| 5364 struct gcpro gcpro1; | |
| 5365 Lisp_Object args[6]; | |
| 5366 args[0] = fn; | |
| 5367 args[1] = arg0; | |
| 5368 args[2] = arg1; | |
| 5369 args[3] = arg2; | |
| 5370 args[4] = arg3; | |
| 5371 args[5] = arg4; | |
| 5372 GCPRO1 (args[0]); | |
| 5373 gcpro1.nvars = 6; | |
| 5374 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5375 } | |
| 5376 | |
| 5377 Lisp_Object | |
| 5378 call6 (Lisp_Object fn, | |
| 5379 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5380 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5381 { | |
| 5382 /* This function can GC */ | |
| 5383 struct gcpro gcpro1; | |
| 5384 Lisp_Object args[7]; | |
| 5385 args[0] = fn; | |
| 5386 args[1] = arg0; | |
| 5387 args[2] = arg1; | |
| 5388 args[3] = arg2; | |
| 5389 args[4] = arg3; | |
| 5390 args[5] = arg4; | |
| 5391 args[6] = arg5; | |
| 5392 GCPRO1 (args[0]); | |
| 5393 gcpro1.nvars = 7; | |
| 5394 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5395 } | |
| 5396 | |
| 5397 Lisp_Object | |
| 5398 call7 (Lisp_Object fn, | |
| 5399 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5400 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5401 Lisp_Object arg6) | |
| 5402 { | |
| 5403 /* This function can GC */ | |
| 5404 struct gcpro gcpro1; | |
| 5405 Lisp_Object args[8]; | |
| 5406 args[0] = fn; | |
| 5407 args[1] = arg0; | |
| 5408 args[2] = arg1; | |
| 5409 args[3] = arg2; | |
| 5410 args[4] = arg3; | |
| 5411 args[5] = arg4; | |
| 5412 args[6] = arg5; | |
| 5413 args[7] = arg6; | |
| 5414 GCPRO1 (args[0]); | |
| 5415 gcpro1.nvars = 8; | |
| 5416 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5417 } | |
| 5418 | |
| 5419 Lisp_Object | |
| 5420 call8 (Lisp_Object fn, | |
| 5421 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5422 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5423 Lisp_Object arg6, Lisp_Object arg7) | |
| 5424 { | |
| 5425 /* This function can GC */ | |
| 5426 struct gcpro gcpro1; | |
| 5427 Lisp_Object args[9]; | |
| 5428 args[0] = fn; | |
| 5429 args[1] = arg0; | |
| 5430 args[2] = arg1; | |
| 5431 args[3] = arg2; | |
| 5432 args[4] = arg3; | |
| 5433 args[5] = arg4; | |
| 5434 args[6] = arg5; | |
| 5435 args[7] = arg6; | |
| 5436 args[8] = arg7; | |
| 5437 GCPRO1 (args[0]); | |
| 5438 gcpro1.nvars = 9; | |
| 5439 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5440 } | |
| 5441 | |
| 5442 Lisp_Object | |
| 5443 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5444 { | |
| 5445 if (current_buffer == buf) | |
| 5446 return call0 (fn); | |
| 5447 else | |
| 5448 { | |
| 5449 Lisp_Object val; | |
| 5450 int speccount = specpdl_depth(); | |
| 5451 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5452 set_buffer_internal (buf); | |
| 5453 val = call0 (fn); | |
| 771 | 5454 unbind_to (speccount); |
| 428 | 5455 return val; |
| 5456 } | |
| 5457 } | |
| 5458 | |
| 5459 Lisp_Object | |
| 5460 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5461 Lisp_Object arg0) | |
| 5462 { | |
| 5463 if (current_buffer == buf) | |
| 5464 return call1 (fn, arg0); | |
| 5465 else | |
| 5466 { | |
| 5467 Lisp_Object val; | |
| 5468 int speccount = specpdl_depth(); | |
| 5469 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5470 set_buffer_internal (buf); | |
| 5471 val = call1 (fn, arg0); | |
| 771 | 5472 unbind_to (speccount); |
| 428 | 5473 return val; |
| 5474 } | |
| 5475 } | |
| 5476 | |
| 5477 Lisp_Object | |
| 5478 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5479 Lisp_Object arg0, Lisp_Object arg1) | |
| 5480 { | |
| 5481 if (current_buffer == buf) | |
| 5482 return call2 (fn, arg0, arg1); | |
| 5483 else | |
| 5484 { | |
| 5485 Lisp_Object val; | |
| 5486 int speccount = specpdl_depth(); | |
| 5487 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5488 set_buffer_internal (buf); | |
| 5489 val = call2 (fn, arg0, arg1); | |
| 771 | 5490 unbind_to (speccount); |
| 428 | 5491 return val; |
| 5492 } | |
| 5493 } | |
| 5494 | |
| 5495 Lisp_Object | |
| 5496 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5497 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5498 { | |
| 5499 if (current_buffer == buf) | |
| 5500 return call3 (fn, arg0, arg1, arg2); | |
| 5501 else | |
| 5502 { | |
| 5503 Lisp_Object val; | |
| 5504 int speccount = specpdl_depth(); | |
| 5505 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5506 set_buffer_internal (buf); | |
| 5507 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5508 unbind_to (speccount); |
| 428 | 5509 return val; |
| 5510 } | |
| 5511 } | |
| 5512 | |
| 5513 Lisp_Object | |
| 5514 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5515 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5516 Lisp_Object arg3) | |
| 5517 { | |
| 5518 if (current_buffer == buf) | |
| 5519 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5520 else | |
| 5521 { | |
| 5522 Lisp_Object val; | |
| 5523 int speccount = specpdl_depth(); | |
| 5524 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5525 set_buffer_internal (buf); | |
| 5526 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5527 unbind_to (speccount); |
| 428 | 5528 return val; |
| 5529 } | |
| 5530 } | |
| 5531 | |
| 5532 Lisp_Object | |
| 5533 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5534 { | |
| 5535 if (current_buffer == buf) | |
| 5536 return Feval (form); | |
| 5537 else | |
| 5538 { | |
| 5539 Lisp_Object val; | |
| 5540 int speccount = specpdl_depth(); | |
| 5541 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5542 set_buffer_internal (buf); | |
| 5543 val = Feval (form); | |
| 771 | 5544 unbind_to (speccount); |
| 428 | 5545 return val; |
| 5546 } | |
| 5547 } | |
| 5548 | |
| 5549 | |
| 5550 /************************************************************************/ | |
| 5551 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5552 /************************************************************************/ | |
| 5553 | |
| 853 | 5554 int |
| 5555 get_inhibit_flags (void) | |
| 5556 { | |
| 5557 return inhibit_flags; | |
| 5558 } | |
| 5559 | |
| 5560 void | |
| 2286 | 5561 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5562 { |
| 5563 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5564 { | |
| 5565 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5566 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5567 invalid_change | |
| 5568 ("Modification of this buffer not currently permitted", obj); | |
| 5569 } | |
| 5570 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5571 { | |
| 5572 if (what == OPERATION_DELETE_OBJECT | |
| 5573 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5574 || CONSOLEP (obj)) | |
| 5575 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5576 invalid_change | |
| 5577 ("Deletion of this object not currently permitted", obj); | |
| 5578 } | |
| 5579 } | |
| 5580 | |
| 5581 void | |
| 5582 note_object_created (Lisp_Object obj) | |
| 5583 { | |
| 5584 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5585 { | |
| 5586 if (BUFFERP (obj)) | |
| 5587 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5588 } | |
| 5589 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5590 { | |
| 5591 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5592 || CONSOLEP (obj)) | |
| 5593 Vdeletable_permanent_display_objects = | |
| 5594 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5595 } | |
| 5596 } | |
| 5597 | |
| 5598 void | |
| 5599 note_object_deleted (Lisp_Object obj) | |
| 5600 { | |
| 5601 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5602 { | |
| 5603 if (BUFFERP (obj)) | |
| 5604 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5605 } | |
| 5606 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5607 { | |
| 5608 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5609 || CONSOLEP (obj)) | |
| 5610 Vdeletable_permanent_display_objects = | |
| 5611 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5612 } | |
| 5613 } | |
| 5614 | |
| 5615 struct call_trapping_problems | |
| 5616 { | |
| 5617 Lisp_Object catchtag; | |
| 5618 Lisp_Object error_conditions; | |
| 5619 Lisp_Object data; | |
| 5620 Lisp_Object backtrace; | |
| 5621 Lisp_Object warning_class; | |
| 5622 | |
| 867 | 5623 const CIbyte *warning_string; |
| 853 | 5624 Lisp_Object (*fun) (void *); |
| 5625 void *arg; | |
| 5626 }; | |
| 428 | 5627 |
| 2532 | 5628 static Lisp_Object |
| 5629 maybe_get_trapping_problems_backtrace (void) | |
| 5630 { | |
| 5631 Lisp_Object backtrace; | |
| 853 | 5632 |
| 1123 | 5633 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5634 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5635 { |
| 1333 | 5636 struct gcpro gcpro1; |
| 5637 Lisp_Object lstream = Qnil; | |
| 5638 int speccount = specpdl_depth (); | |
| 5639 | |
| 853 | 5640 /* We're no longer protected against errors or quit here, so at |
| 5641 least let's temporarily inhibit quit. We definitely do not | |
| 5642 want to inhibit quit during the calling of the function | |
| 5643 itself!!!!!!!!!!! */ | |
| 5644 | |
| 5645 specbind (Qinhibit_quit, Qt); | |
| 5646 | |
| 5647 GCPRO1 (lstream); | |
| 5648 lstream = make_resizing_buffer_output_stream (); | |
| 5649 Fbacktrace (lstream, Qt); | |
| 5650 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5651 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5652 Lstream_delete (XLSTREAM (lstream)); |
| 5653 UNGCPRO; | |
| 5654 | |
| 5655 unbind_to (speccount); | |
| 428 | 5656 } |
| 853 | 5657 else |
| 2532 | 5658 backtrace = Qnil; |
| 5659 | |
| 5660 return backtrace; | |
| 5661 } | |
| 5662 | |
| 5663 static DECLARE_DOESNT_RETURN_TYPE | |
| 5664 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5665 | |
| 5666 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5667 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5668 Lisp_Object opaque) | |
| 5669 { | |
| 5670 struct call_trapping_problems *p = | |
| 5671 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5672 | |
| 5673 if (!EQ (error_conditions, Qquit)) | |
| 5674 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5675 else | |
| 853 | 5676 p->backtrace = Qnil; |
| 5677 p->error_conditions = error_conditions; | |
| 5678 p->data = data; | |
| 5679 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5680 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5681 RETURN_NOT_REACHED (Qnil); |
| 853 | 5682 } |
| 5683 | |
| 5684 static Lisp_Object | |
| 5685 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5686 { | |
| 5687 struct call_trapping_problems *p = | |
| 5688 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5689 | |
| 5690 return (p->fun) (p->arg); | |
| 428 | 5691 } |
| 5692 | |
| 5693 static Lisp_Object | |
| 853 | 5694 call_trapping_problems_1 (Lisp_Object opaque) |
| 5695 { | |
| 5696 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5697 call_trapping_problems_2, opaque); | |
| 5698 } | |
| 5699 | |
| 1333 | 5700 static void |
| 5701 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5702 const CIbyte *warning_string, | |
| 5703 struct call_trapping_problems_result *p) | |
| 5704 { | |
| 5705 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5706 { | |
| 5707 int depth = specpdl_depth (); | |
| 5708 | |
| 5709 /* We're no longer protected against errors or quit here, so at | |
| 5710 least let's temporarily inhibit quit. */ | |
| 5711 specbind (Qinhibit_quit, Qt); | |
| 5712 | |
| 5713 if (p->caught_throw) | |
| 5714 { | |
| 5715 Lisp_Object errstr = | |
| 5716 emacs_sprintf_string_lisp | |
| 2532 | 5717 ("%s: Attempt to throw outside of function:" |
| 5718 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5719 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5720 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5721 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5722 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5723 } | |
| 2421 | 5724 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5725 { |
| 5726 Lisp_Object errstr; | |
| 5727 /* #### This should call | |
| 5728 (with-output-to-string (display-error (cons error_conditions | |
| 5729 data)) | |
| 5730 but that stuff is all in Lisp currently. */ | |
| 5731 errstr = | |
| 5732 emacs_sprintf_string_lisp | |
| 5733 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5734 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5735 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5736 p->error_conditions, p->data, p->backtrace); |
| 5737 | |
| 5738 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5739 errstr); | |
| 5740 } | |
| 5741 | |
| 5742 unbind_to (depth); | |
| 5743 } | |
| 5744 } | |
| 5745 | |
| 1318 | 5746 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5747 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5748 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5749 use call_trapping_problems() for that. Turn the flags off with | |
| 5750 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5751 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5752 various other flags). */ | |
| 5753 | |
| 5754 int | |
| 5755 set_trapping_problems_flags (int flags) | |
| 5756 { | |
| 5757 int new_inhibit_flags; | |
| 5758 | |
| 5759 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5760 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5761 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5762 | INHIBIT_ENTERING_DEBUGGER | |
| 5763 | INHIBIT_WARNING_ISSUE | |
| 5764 | INHIBIT_GC; | |
| 5765 | |
| 5766 new_inhibit_flags = inhibit_flags | flags; | |
| 5767 if (new_inhibit_flags != inhibit_flags) | |
| 5768 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5769 | |
| 5770 if (flags & INHIBIT_QUIT) | |
| 5771 specbind (Qinhibit_quit, Qt); | |
| 5772 | |
| 5773 if (flags & UNINHIBIT_QUIT) | |
| 5774 begin_do_check_for_quit (); | |
| 5775 | |
| 5776 if (flags & INHIBIT_GC) | |
| 5777 begin_gc_forbidden (); | |
| 5778 | |
| 5779 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5780 inner one creates some buffers/etc., should the outer one be able | |
| 5781 to delete them? I think so, but it means we need to combine rather | |
| 5782 than just reset the value. */ | |
| 5783 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5784 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5785 | |
| 5786 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5787 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5788 | |
| 5789 return flags; | |
| 5790 } | |
| 5791 | |
| 853 | 5792 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5793 can be trapped or inhibited, according to FLAGS. | |
| 5794 | |
| 5795 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5796 the error is caught and a warning is issued, specifying the | |
| 5797 specific error that occurred and a backtrace. In that case, | |
| 5798 WARNING_STRING should be given, and will be printed at the | |
| 5799 beginning of the error to indicate where the error occurred. | |
| 5800 | |
| 5801 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5802 `throw' out of the function being called are trapped, and a warning | |
| 5803 issued. (Again, WARNING_STRING should be given.) | |
| 5804 | |
| 2367 | 5805 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5806 this applies to recursive invocations of call_trapping_problems, too. |
| 5807 | |
| 1333 | 5808 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5809 but values useful for generating a warning are still computed (in | |
| 5810 particular, the backtrace), so that the calling function can issue | |
| 5811 a warning. | |
| 5812 | |
| 853 | 5813 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5814 issued, but at level `debug', which normally is below the minimum | |
| 5815 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5816 be ignored entirely. The user can change this variable, however, | |
| 5817 to see the warnings.) | |
| 5818 | |
| 5819 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5820 given, you are *guaranteed* that there will be no non-local exits | |
| 5821 out of this function. | |
| 5822 | |
| 5823 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5824 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5825 automatically caught as well, and treated as an error; you can | |
| 5826 check for this using EQ (problems->error_conditions, Qquit). | |
| 5827 | |
| 5828 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5829 turned on. (It will abort the code being called, but will still be | |
| 5830 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5831 given.) This is useful when QUIT checking has been turned off by a | |
| 5832 higher-level caller. | |
| 5833 | |
| 5834 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5835 This is useful for Lisp called within redisplay, for example. |
| 853 | 5836 |
| 5837 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5838 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5839 or consoles that were already in existence at the time this function | |
| 5840 was called. (However, it's perfectly legal for code to create a new | |
| 5841 buffer and then delete it.) | |
| 5842 | |
| 5843 #### It might be useful to have a flag that inhibits deletion of a | |
| 5844 specific permanent display object and everything it's attached to | |
| 5845 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5846 attached to. | |
| 5847 | |
| 5848 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5849 code is not allowed to modify the text of any buffers that were | |
| 5850 already in existence at the time this function was called. | |
| 5851 (However, it's perfectly legal for code to create a new buffer and | |
| 5852 then modify its text.) | |
| 5853 | |
| 5854 [These last two flags are implemented using global variables | |
| 5855 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5856 which keep track of a list of all buffers or permanent display | |
| 5857 objects created since the last time one of these flags was set. | |
| 5858 The code that deletes buffers, etc. and modifies buffers checks | |
| 5859 | |
| 5860 (1) if the corresponding flag is set (through the global variable | |
| 5861 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5862 | |
| 5863 (2) if the object to be modified or deleted is not in the | |
| 5864 appropriate list. | |
| 5865 | |
| 5866 If so, it signals an error. | |
| 5867 | |
| 5868 Recursive calls to call_trapping_problems() are allowed. In | |
| 5869 the case of the two flags mentioned above, the current values | |
| 5870 of the global variables are stored in an unwind-protect, and | |
| 5871 they're reset to nil.] | |
| 5872 | |
| 5873 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5874 be entered if an error occurs inside the Lisp code being called, | |
| 5875 even when the user has requested an error. In such case, a warning | |
| 5876 is issued stating that access to the debugger is denied, unless | |
| 5877 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5878 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5879 in such cases either the display is in an inconsistent state or | |
| 5880 doing window operations is explicitly forbidden by the OS, and the | |
| 5881 debugger would causes visual changes on the screen and might create | |
| 5882 another frame. | |
| 5883 | |
| 5884 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5885 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5886 specifiers relating to display, other variables relating to | |
| 5887 display, splitting, deleting, or resizing windows or frames, | |
| 5888 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5889 allowed. This is for things called absolutely in the middle of | |
| 5890 redisplay, which expects things to be *exactly* the same after the | |
| 5891 call as before. This isn't completely implemented and needs to be | |
| 5892 thought out some more to determine exactly what its semantics are. | |
| 5893 For the moment, turning on this flag also turns on | |
| 5894 | |
| 5895 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5896 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5897 INHIBIT_ENTERING_DEBUGGER | |
| 5898 INHIBIT_WARNING_ISSUE | |
| 5899 INHIBIT_GC | |
| 5900 | |
| 5901 #### The following five flags are defined, but unimplemented: | |
| 5902 | |
| 5903 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5904 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5905 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5906 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5907 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5908 | |
| 5909 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5910 call_with_suspended_errors() was invoked. This exists only for | |
| 5911 debugging purposes -- often we want to break when a signal happens, | |
| 5912 but ignore signals from call_with_suspended_errors(), because they | |
| 5913 occur often and for legitimate reasons. | |
| 5914 | |
| 5915 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5916 which exact information about any occurring problems (either an | |
| 5917 error or an attempted throw past this boundary). | |
| 5918 | |
| 5919 If a problem occurred and aborted operation (error, quit, or | |
| 5920 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5921 from the call to (*fun) (arg) is returned. */ | |
| 5922 | |
| 5923 Lisp_Object | |
| 5924 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5925 const CIbyte *warning_string, |
| 853 | 5926 int flags, |
| 5927 struct call_trapping_problems_result *problem, | |
| 5928 Lisp_Object (*fun) (void *), | |
| 5929 void *arg) | |
| 5930 { | |
| 1318 | 5931 int speccount = specpdl_depth (); |
| 853 | 5932 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5933 struct call_trapping_problems package; | |
| 1333 | 5934 struct call_trapping_problems_result real_problem; |
| 2532 | 5935 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5936 int thrown = 0; |
| 5937 | |
| 5938 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5939 assert (!NILP (warning_class)); | |
| 5940 | |
| 5941 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 5942 | |
| 5943 package.warning_class = warning_class; | |
| 5944 package.warning_string = warning_string; | |
| 5945 package.fun = fun; | |
| 5946 package.arg = arg; | |
| 5947 package.catchtag = | |
| 5948 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 5949 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 5950 Qnil; | |
| 5951 package.error_conditions = Qnil; | |
| 5952 package.data = Qnil; | |
| 5953 package.backtrace = Qnil; | |
| 5954 | |
| 1318 | 5955 flags = set_trapping_problems_flags (flags); |
| 853 | 5956 |
| 5957 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 5958 opaque = make_opaque_ptr (&package); | |
| 5959 else | |
| 5960 opaque = Qnil; | |
| 5961 | |
| 5962 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 5963 package.backtrace, opaque); | |
| 5964 | |
| 5965 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 5966 /* We need a catch so that our condition-handler can throw back here | |
| 5967 after printing the warning. (We print the warning in the stack | |
| 5968 context of the error, so we can get a backtrace.) */ | |
| 5969 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 5970 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5971 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 5972 /* We skip over the first wrapper, which traps errors. */ | |
| 5973 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 5974 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5975 else |
| 5976 /* Nothing special. */ | |
| 5977 tem = (fun) (arg); | |
| 5978 | |
| 1333 | 5979 if (!problem) |
| 5980 problem = &real_problem; | |
| 5981 | |
| 5982 if (!thrown) | |
| 853 | 5983 { |
| 1333 | 5984 problem->caught_error = 0; |
| 5985 problem->caught_throw = 0; | |
| 5986 problem->error_conditions = Qnil; | |
| 5987 problem->data = Qnil; | |
| 5988 problem->backtrace = Qnil; | |
| 5989 problem->thrown_tag = Qnil; | |
| 5990 problem->thrown_value = Qnil; | |
| 853 | 5991 } |
| 1333 | 5992 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 5993 { |
| 1333 | 5994 problem->caught_error = 1; |
| 5995 problem->caught_throw = 0; | |
| 5996 problem->error_conditions = package.error_conditions; | |
| 5997 problem->data = package.data; | |
| 5998 problem->backtrace = package.backtrace; | |
| 5999 problem->thrown_tag = Qnil; | |
| 6000 problem->thrown_value = Qnil; | |
| 853 | 6001 } |
| 1333 | 6002 else |
| 6003 { | |
| 6004 problem->caught_error = 0; | |
| 6005 problem->caught_throw = 1; | |
| 6006 problem->error_conditions = Qnil; | |
| 6007 problem->data = Qnil; | |
| 2532 | 6008 problem->backtrace = thrown_backtrace; |
| 1333 | 6009 problem->thrown_tag = thrown_tag; |
| 6010 problem->thrown_value = tem; | |
| 6011 } | |
| 6012 | |
| 6013 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6014 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6015 problem); | |
| 853 | 6016 |
| 6017 if (!NILP (package.catchtag) && | |
| 6018 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6019 free_opaque_ptr (package.catchtag); | |
| 6020 | |
| 6021 if (!NILP (opaque)) | |
| 6022 free_opaque_ptr (opaque); | |
| 6023 | |
| 6024 unbind_to (speccount); | |
| 6025 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6026 } | |
| 6027 | |
| 6028 struct va_call_trapping_problems | |
| 6029 { | |
| 6030 lisp_fn_t fun; | |
| 6031 int nargs; | |
| 6032 Lisp_Object *args; | |
| 6033 }; | |
| 6034 | |
| 6035 static Lisp_Object | |
| 6036 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6037 { | |
| 6038 struct va_call_trapping_problems *ai_no_corrida = | |
| 6039 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6040 Lisp_Object pegar_no_bumbum; | |
| 6041 | |
| 6042 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6043 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6044 return pegar_no_bumbum; | |
| 6045 } | |
| 6046 | |
| 6047 /* #### document me. */ | |
| 6048 | |
| 6049 Lisp_Object | |
| 6050 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6051 const CIbyte *warning_string, |
| 853 | 6052 int flags, |
| 6053 struct call_trapping_problems_result *problem, | |
| 6054 lisp_fn_t fun, int nargs, ...) | |
| 6055 { | |
| 6056 va_list vargs; | |
| 6057 Lisp_Object args[20]; | |
| 6058 int i; | |
| 6059 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6060 struct gcpro gcpro1; | |
| 6061 | |
| 6062 assert (nargs >= 0 && nargs < 20); | |
| 6063 | |
| 6064 va_start (vargs, nargs); | |
| 6065 for (i = 0; i < nargs; i++) | |
| 6066 args[i] = va_arg (vargs, Lisp_Object); | |
| 6067 va_end (vargs); | |
| 6068 | |
| 6069 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6070 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6071 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6072 | |
| 6073 GCPRO1_ARRAY (args, nargs); | |
| 6074 RETURN_UNGCPRO | |
| 6075 (call_trapping_problems | |
| 6076 (warning_class, warning_string, flags, problem, | |
| 6077 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6078 } | |
| 6079 | |
| 6080 /* this is an older interface, barely different from | |
| 6081 va_call_trapping_problems. | |
| 6082 | |
| 6083 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6084 va_call_trapping_problems(). */ | |
| 6085 | |
| 6086 Lisp_Object | |
| 6087 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6088 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6089 int nargs, ...) |
| 6090 { | |
| 6091 va_list vargs; | |
| 6092 Lisp_Object args[20]; | |
| 6093 int i; | |
| 6094 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6095 int flags; | |
| 6096 struct gcpro gcpro1; | |
| 6097 | |
| 1204 | 6098 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6099 assert (!NILP (class_)); | |
| 853 | 6100 assert (nargs >= 0 && nargs < 20); |
| 6101 | |
| 6102 va_start (vargs, nargs); | |
| 6103 for (i = 0; i < nargs; i++) | |
| 6104 args[i] = va_arg (vargs, Lisp_Object); | |
| 6105 va_end (vargs); | |
| 6106 | |
| 6107 /* If error-checking is not disabled, just call the function. */ | |
| 6108 | |
| 6109 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6110 { | |
| 6111 Lisp_Object val; | |
| 6112 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6113 return val; | |
| 6114 } | |
| 6115 | |
| 6116 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6117 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6118 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6119 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6120 else | |
| 6121 { | |
| 6122 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6123 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6124 } | |
| 6125 | |
| 6126 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6127 | |
| 6128 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6129 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6130 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6131 | |
| 6132 GCPRO1_ARRAY (args, nargs); | |
| 6133 { | |
| 6134 Lisp_Object its_way_too_goddamn_late = | |
| 6135 call_trapping_problems | |
| 1204 | 6136 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6137 &fazer_invocacao_atrapalhando_problemas); |
| 6138 UNGCPRO; | |
| 6139 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6140 return retval; | |
| 6141 else | |
| 6142 return its_way_too_goddamn_late; | |
| 6143 } | |
| 6144 } | |
| 6145 | |
| 6146 struct calln_trapping_problems | |
| 6147 { | |
| 6148 int nargs; | |
| 6149 Lisp_Object *args; | |
| 6150 }; | |
| 6151 | |
| 6152 static Lisp_Object | |
| 6153 calln_trapping_problems_1 (void *puta) | |
| 6154 { | |
| 6155 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6156 | |
| 6157 return Ffuncall (p->nargs, p->args); | |
| 428 | 6158 } |
| 6159 | |
| 6160 static Lisp_Object | |
| 853 | 6161 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6162 const CIbyte *warning_string, int flags, |
| 853 | 6163 struct call_trapping_problems_result *problem, |
| 6164 int nargs, Lisp_Object *args) | |
| 6165 { | |
| 6166 struct calln_trapping_problems foo; | |
| 6167 struct gcpro gcpro1; | |
| 6168 | |
| 6169 if (SYMBOLP (args[0])) | |
| 6170 { | |
| 6171 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6172 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6173 { | |
| 6174 if (problem) | |
| 6175 { | |
| 6176 problem->caught_error = 0; | |
| 6177 problem->caught_throw = 0; | |
| 6178 problem->error_conditions = Qnil; | |
| 6179 problem->data = Qnil; | |
| 6180 problem->backtrace = Qnil; | |
| 6181 problem->thrown_tag = Qnil; | |
| 6182 problem->thrown_value = Qnil; | |
| 6183 } | |
| 6184 return Qnil; | |
| 6185 } | |
| 6186 } | |
| 6187 | |
| 6188 foo.nargs = nargs; | |
| 6189 foo.args = args; | |
| 6190 | |
| 6191 GCPRO1_ARRAY (args, nargs); | |
| 6192 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6193 flags, problem, | |
| 6194 calln_trapping_problems_1, | |
| 6195 &foo)); | |
| 6196 } | |
| 6197 | |
| 6198 /* #### fix these functions to follow the calling convention of | |
| 6199 call_trapping_problems! */ | |
| 6200 | |
| 6201 Lisp_Object | |
| 867 | 6202 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6203 int flags) |
| 6204 { | |
| 6205 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6206 &function); | |
| 428 | 6207 } |
| 6208 | |
| 6209 Lisp_Object | |
| 867 | 6210 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6211 Lisp_Object object, int flags) |
| 6212 { | |
| 6213 Lisp_Object args[2]; | |
| 6214 | |
| 6215 args[0] = function; | |
| 6216 args[1] = object; | |
| 6217 | |
| 6218 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6219 args); | |
| 6220 } | |
| 6221 | |
| 6222 Lisp_Object | |
| 867 | 6223 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6224 Lisp_Object object1, Lisp_Object object2, |
| 6225 int flags) | |
| 6226 { | |
| 6227 Lisp_Object args[3]; | |
| 6228 | |
| 6229 args[0] = function; | |
| 6230 args[1] = object1; | |
| 6231 args[2] = object2; | |
| 6232 | |
| 6233 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6234 args); | |
| 6235 } | |
| 6236 | |
| 6237 Lisp_Object | |
| 867 | 6238 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6239 Lisp_Object object1, Lisp_Object object2, |
| 6240 Lisp_Object object3, int flags) | |
| 6241 { | |
| 6242 Lisp_Object args[4]; | |
| 6243 | |
| 6244 args[0] = function; | |
| 6245 args[1] = object1; | |
| 6246 args[2] = object2; | |
| 6247 args[3] = object3; | |
| 6248 | |
| 6249 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6250 args); | |
| 6251 } | |
| 6252 | |
| 6253 Lisp_Object | |
| 867 | 6254 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6255 Lisp_Object object1, Lisp_Object object2, |
| 6256 Lisp_Object object3, Lisp_Object object4, | |
| 6257 int flags) | |
| 6258 { | |
| 6259 Lisp_Object args[5]; | |
| 6260 | |
| 6261 args[0] = function; | |
| 6262 args[1] = object1; | |
| 6263 args[2] = object2; | |
| 6264 args[3] = object3; | |
| 6265 args[4] = object4; | |
| 6266 | |
| 6267 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6268 args); | |
| 6269 } | |
| 6270 | |
| 6271 Lisp_Object | |
| 867 | 6272 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6273 Lisp_Object object1, Lisp_Object object2, |
| 6274 Lisp_Object object3, Lisp_Object object4, | |
| 6275 Lisp_Object object5, int flags) | |
| 6276 { | |
| 6277 Lisp_Object args[6]; | |
| 6278 | |
| 6279 args[0] = function; | |
| 6280 args[1] = object1; | |
| 6281 args[2] = object2; | |
| 6282 args[3] = object3; | |
| 6283 args[4] = object4; | |
| 6284 args[5] = object5; | |
| 6285 | |
| 6286 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6287 args); | |
| 6288 } | |
| 6289 | |
| 6290 struct eval_in_buffer_trapping_problems | |
| 6291 { | |
| 6292 struct buffer *buf; | |
| 6293 Lisp_Object form; | |
| 6294 }; | |
| 6295 | |
| 6296 static Lisp_Object | |
| 6297 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6298 { | |
| 6299 struct eval_in_buffer_trapping_problems *p = | |
| 6300 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6301 | |
| 6302 return eval_in_buffer (p->buf, p->form); | |
| 6303 } | |
| 6304 | |
| 6305 /* #### fix these functions to follow the calling convention of | |
| 6306 call_trapping_problems! */ | |
| 6307 | |
| 6308 Lisp_Object | |
| 867 | 6309 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6310 struct buffer *buf, Lisp_Object form, |
| 6311 int flags) | |
| 6312 { | |
| 6313 struct eval_in_buffer_trapping_problems p; | |
| 6314 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6315 struct gcpro gcpro1, gcpro2; |
| 6316 | |
| 853 | 6317 GCPRO2 (buffer, form); |
| 6318 p.buf = buf; | |
| 6319 p.form = form; | |
| 6320 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6321 eval_in_buffer_trapping_problems_1, | |
| 6322 &p)); | |
| 6323 } | |
| 6324 | |
| 6325 Lisp_Object | |
| 1333 | 6326 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6327 Lisp_Object hook_symbol, |
| 6328 int flags) | |
| 6329 { | |
| 1333 | 6330 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6331 RUN_HOOKS_TO_COMPLETION, |
| 6332 flags); | |
| 428 | 6333 } |
| 6334 | |
| 6335 static Lisp_Object | |
| 853 | 6336 safe_run_hook_trapping_problems_1 (void *puta) |
| 6337 { | |
| 6338 Lisp_Object hook = VOID_TO_LISP (puta); | |
| 6339 | |
| 6340 run_hook (hook); | |
| 428 | 6341 return Qnil; |
| 6342 } | |
| 6343 | |
| 853 | 6344 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6345 if an error occurs (but not a quit). */ | |
| 6346 | |
| 428 | 6347 Lisp_Object |
| 1333 | 6348 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6349 Lisp_Object hook_symbol, int flags) | |
| 853 | 6350 { |
| 428 | 6351 Lisp_Object tem; |
| 853 | 6352 struct gcpro gcpro1, gcpro2; |
| 6353 struct call_trapping_problems_result prob; | |
| 428 | 6354 |
| 6355 if (!initialized || preparing_for_armageddon) | |
| 6356 return Qnil; | |
| 6357 tem = find_symbol_value (hook_symbol); | |
| 6358 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6359 return Qnil; | |
| 6360 | |
| 853 | 6361 GCPRO2 (hook_symbol, tem); |
| 1333 | 6362 tem = call_trapping_problems (Qerror, NULL, |
| 6363 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6364 &prob, |
| 6365 safe_run_hook_trapping_problems_1, | |
| 6366 LISP_TO_VOID (hook_symbol)); | |
| 1333 | 6367 { |
| 6368 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6369 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6370 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6371 | |
| 6372 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6373 Qquit))) | |
| 6374 { | |
| 6375 Fset (hook_symbol, Qnil); | |
| 6376 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6377 } | |
| 6378 else | |
| 6379 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6380 | |
| 6381 | |
| 6382 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6383 &prob); | |
| 6384 } | |
| 6385 | |
| 6386 UNGCPRO; | |
| 6387 return tem; | |
| 853 | 6388 } |
| 6389 | |
| 6390 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6391 { | |
| 6392 struct buffer *buf; | |
| 6393 int nargs; | |
| 6394 Lisp_Object *args; | |
| 6395 enum run_hooks_condition cond; | |
| 6396 }; | |
| 6397 | |
| 6398 static Lisp_Object | |
| 6399 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6400 { | |
| 6401 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6402 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6403 | |
| 6404 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6405 porra->cond); | |
| 6406 } | |
| 6407 | |
| 6408 /* #### fix these functions to follow the calling convention of | |
| 6409 call_trapping_problems! */ | |
| 428 | 6410 |
| 6411 Lisp_Object | |
| 1333 | 6412 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6413 struct buffer *buf, int nargs, |
| 6414 Lisp_Object *args, | |
| 6415 enum run_hooks_condition cond, | |
| 6416 int flags) | |
| 6417 { | |
| 6418 Lisp_Object sym, val, ret; | |
| 6419 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6420 struct gcpro gcpro1; |
| 1333 | 6421 Lisp_Object hook_name; |
| 6422 Ibyte *hook_str; | |
| 6423 Ibyte *err; | |
| 428 | 6424 |
| 6425 if (!initialized || preparing_for_armageddon) | |
| 853 | 6426 /* We need to bail out of here pronto. */ |
| 428 | 6427 return Qnil; |
| 6428 | |
| 853 | 6429 GCPRO1_ARRAY (args, nargs); |
| 6430 | |
| 6431 sym = args[0]; | |
| 6432 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6433 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6434 | |
| 6435 if (UNBOUNDP (val) || NILP (val)) | |
| 6436 RETURN_UNGCPRO (ret); | |
| 6437 | |
| 6438 diversity_and_distrust.buf = buf; | |
| 6439 diversity_and_distrust.nargs = nargs; | |
| 6440 diversity_and_distrust.args = args; | |
| 6441 diversity_and_distrust.cond = cond; | |
| 6442 | |
| 1333 | 6443 hook_name = XSYMBOL_NAME (args[0]); |
| 6444 hook_str = XSTRING_DATA (hook_name); | |
| 6445 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6446 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6447 RETURN_UNGCPRO |
| 6448 (call_trapping_problems | |
| 1333 | 6449 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6450 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6451 &diversity_and_distrust)); | |
| 428 | 6452 } |
| 6453 | |
| 6454 Lisp_Object | |
| 1333 | 6455 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6456 int nargs, |
| 6457 Lisp_Object *args, | |
| 6458 enum run_hooks_condition cond, | |
| 6459 int flags) | |
| 6460 { | |
| 6461 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6462 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6463 } |
| 6464 | |
| 6465 Lisp_Object | |
| 1333 | 6466 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6467 Lisp_Object hook_var, |
| 6468 int nargs, ...) | |
| 6469 { | |
| 6470 /* This function can GC */ | |
| 6471 struct gcpro gcpro1; | |
| 6472 int i; | |
| 6473 va_list vargs; | |
| 6474 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6475 int flags; | |
| 6476 | |
| 6477 va_start (vargs, nargs); | |
| 6478 funcall_args[0] = hook_var; | |
| 6479 for (i = 0; i < nargs; i++) | |
| 6480 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6481 flags = va_arg (vargs, int); | |
| 6482 va_end (vargs); | |
| 6483 | |
| 6484 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6485 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6486 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6487 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6488 } |
| 6489 | |
| 6490 Lisp_Object | |
| 1333 | 6491 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6492 struct buffer *buf, |
| 6493 Lisp_Object hook_var, | |
| 6494 int nargs, ...) | |
| 6495 { | |
| 6496 /* This function can GC */ | |
| 6497 struct gcpro gcpro1; | |
| 6498 int i; | |
| 6499 va_list vargs; | |
| 6500 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6501 int flags; | |
| 6502 | |
| 6503 va_start (vargs, nargs); | |
| 6504 funcall_args[0] = hook_var; | |
| 6505 for (i = 0; i < nargs; i++) | |
| 6506 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6507 flags = va_arg (vargs, int); | |
| 6508 va_end (vargs); | |
| 6509 | |
| 6510 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6511 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6512 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6513 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6514 } |
| 6515 | |
| 6516 | |
| 6517 /************************************************************************/ | |
| 6518 /* The special binding stack */ | |
| 771 | 6519 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6520 /* When performance is critical, use the macros in backtrace.h. */ |
| 6521 /************************************************************************/ | |
| 6522 | |
| 6523 #define min_max_specpdl_size 400 | |
| 6524 | |
| 6525 void | |
| 647 | 6526 grow_specpdl (EMACS_INT reserved) |
| 6527 { | |
| 6528 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6529 if (size_needed >= max_specpdl_size) |
| 6530 { | |
| 6531 if (max_specpdl_size < min_max_specpdl_size) | |
| 6532 max_specpdl_size = min_max_specpdl_size; | |
| 6533 if (size_needed >= max_specpdl_size) | |
| 6534 { | |
| 1951 | 6535 /* Leave room for some specpdl in the debugger. */ |
| 6536 max_specpdl_size = size_needed + 100; | |
| 6537 if (max_specpdl_size > specpdl_size) | |
| 6538 { | |
| 6539 specpdl_size = max_specpdl_size; | |
| 6540 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6541 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6542 } | |
| 563 | 6543 signal_continuable_error |
| 6544 (Qstack_overflow, | |
| 6545 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6546 } |
| 6547 } | |
| 6548 while (specpdl_size < size_needed) | |
| 6549 { | |
| 6550 specpdl_size *= 2; | |
| 6551 if (specpdl_size > max_specpdl_size) | |
| 6552 specpdl_size = max_specpdl_size; | |
| 6553 } | |
| 6554 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6555 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6556 check_specbind_stack_sanity (); |
| 428 | 6557 } |
| 6558 | |
| 6559 | |
| 6560 /* Handle unbinding buffer-local variables */ | |
| 6561 static Lisp_Object | |
| 6562 specbind_unwind_local (Lisp_Object ovalue) | |
| 6563 { | |
| 6564 Lisp_Object current = Fcurrent_buffer (); | |
| 6565 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6566 Lisp_Object victim = ovalue; |
| 6567 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6568 ovalue = XCDR (victim); | |
| 428 | 6569 |
| 6570 free_cons (victim); | |
| 6571 | |
| 6572 if (NILP (buf)) | |
| 6573 { | |
| 6574 /* Deleted buffer -- do nothing */ | |
| 6575 } | |
| 6576 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6577 { | |
| 6578 /* Was buffer-local when binding was made, now no longer is. | |
| 6579 * (kill-local-variable can do this.) | |
| 6580 * Do nothing in this case. | |
| 6581 */ | |
| 6582 } | |
| 6583 else if (EQ (buf, current)) | |
| 6584 Fset (symbol, ovalue); | |
| 6585 else | |
| 6586 { | |
| 6587 /* Urk! Somebody switched buffers */ | |
| 6588 struct gcpro gcpro1; | |
| 6589 GCPRO1 (current); | |
| 6590 Fset_buffer (buf); | |
| 6591 Fset (symbol, ovalue); | |
| 6592 Fset_buffer (current); | |
| 6593 UNGCPRO; | |
| 6594 } | |
| 6595 return symbol; | |
| 6596 } | |
| 6597 | |
| 6598 static Lisp_Object | |
| 6599 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6600 { | |
| 6601 Lisp_Object current = Fcurrent_buffer (); | |
| 6602 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6603 | |
| 6604 buffer = get_buffer (buffer, 0); | |
| 6605 if (NILP (buffer)) | |
| 6606 { | |
| 6607 /* Deleted buffer -- do nothing */ | |
| 6608 } | |
| 6609 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6610 { | |
| 6611 /* Was buffer-local when binding was made, now no longer is. | |
| 6612 * (kill-local-variable can do this.) | |
| 6613 * Do nothing in this case. | |
| 6614 */ | |
| 6615 } | |
| 6616 else if (EQ (buffer, current)) | |
| 6617 Fkill_local_variable (symbol); | |
| 6618 else | |
| 6619 { | |
| 6620 /* Urk! Somebody switched buffers */ | |
| 6621 struct gcpro gcpro1; | |
| 6622 GCPRO1 (current); | |
| 6623 Fset_buffer (buffer); | |
| 6624 Fkill_local_variable (symbol); | |
| 6625 Fset_buffer (current); | |
| 6626 UNGCPRO; | |
| 6627 } | |
| 6628 return symbol; | |
| 6629 } | |
| 6630 | |
| 6631 | |
| 6632 void | |
| 6633 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6634 { | |
| 6635 SPECBIND (symbol, value); | |
| 853 | 6636 |
| 6637 check_specbind_stack_sanity (); | |
| 428 | 6638 } |
| 6639 | |
| 6640 void | |
| 6641 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6642 { | |
| 6643 int buffer_local = | |
| 6644 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6645 | |
| 6646 if (buffer_local == 0) | |
| 6647 { | |
| 6648 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6649 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6650 } |
| 6651 else if (buffer_local > 0) | |
| 6652 { | |
| 6653 /* Already buffer-local */ | |
| 6654 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6655 find_symbol_value (symbol)); | |
| 6656 specpdl_ptr->func = specbind_unwind_local; | |
| 6657 } | |
| 6658 else | |
| 6659 { | |
| 6660 /* About to become buffer-local */ | |
| 6661 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6662 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6663 } | |
| 6664 | |
| 6665 specpdl_ptr->symbol = symbol; | |
| 6666 specpdl_ptr++; | |
| 6667 specpdl_depth_counter++; | |
| 6668 | |
| 6669 Fset (symbol, value); | |
| 853 | 6670 |
| 6671 check_specbind_stack_sanity (); | |
| 428 | 6672 } |
| 6673 | |
| 771 | 6674 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6675 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6676 before your function returns normally, passing in the integer returned | |
| 6677 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6678 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6679 ignored. #### We should eliminate it entirely. */ | |
| 6680 | |
| 6681 int | |
| 428 | 6682 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6683 Lisp_Object arg) | |
| 6684 { | |
| 6685 SPECPDL_RESERVE (1); | |
| 6686 specpdl_ptr->func = function; | |
| 6687 specpdl_ptr->symbol = Qnil; | |
| 6688 specpdl_ptr->old_value = arg; | |
| 6689 specpdl_ptr++; | |
| 6690 specpdl_depth_counter++; | |
| 853 | 6691 check_specbind_stack_sanity (); |
| 771 | 6692 return specpdl_depth_counter - 1; |
| 6693 } | |
| 6694 | |
| 6695 static Lisp_Object | |
| 802 | 6696 restore_lisp_object (Lisp_Object cons) |
| 6697 { | |
| 6698 Lisp_Object opaque = XCAR (cons); | |
| 6699 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque); | |
| 6700 *addr = XCDR (cons); | |
| 6701 free_opaque_ptr (opaque); | |
| 853 | 6702 free_cons (cons); |
| 802 | 6703 return Qnil; |
| 6704 } | |
| 6705 | |
| 6706 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6707 by ADDR with the value VAL. */ | |
| 814 | 6708 static int |
| 802 | 6709 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6710 Lisp_Object val) | |
| 6711 { | |
| 6712 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6713 return record_unwind_protect (restore_lisp_object, | |
| 6714 noseeum_cons (opaque, val)); | |
| 6715 } | |
| 6716 | |
| 6717 /* Similar to specbind() but for any C variable whose value is a | |
| 6718 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6719 pointed to by ADDR to its existing value, and then changes its | |
| 6720 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6721 pass this to unbind_to() after you are done. */ | |
| 6722 int | |
| 6723 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6724 { | |
| 6725 int count = specpdl_depth (); | |
| 6726 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6727 *addr = newval; | |
| 6728 return count; | |
| 6729 } | |
| 6730 | |
| 6731 static Lisp_Object | |
| 6732 restore_int (Lisp_Object cons) | |
| 6733 { | |
| 6734 Lisp_Object opaque = XCAR (cons); | |
| 6735 Lisp_Object lval = XCDR (cons); | |
| 6736 int *addr = (int *) get_opaque_ptr (opaque); | |
| 6737 int val; | |
| 6738 | |
| 4025 | 6739 /* In the event that a C integer will always fit in an Emacs int, we |
| 6740 haven't ever stored a C integer as an opaque pointer. This #ifdef | |
| 6741 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6742 integers have 32 value bits. */ | |
| 6743 #if INT_VALBITS < INTBITS | |
| 802 | 6744 if (INTP (lval)) |
| 4025 | 6745 { |
| 6746 val = XINT (lval); | |
| 6747 } | |
| 802 | 6748 else |
| 6749 { | |
| 6750 val = (int) get_opaque_ptr (lval); | |
| 6751 free_opaque_ptr (lval); | |
| 6752 } | |
| 4025 | 6753 #else /* !(INT_VALBITS < INTBITS) */ |
| 6754 val = XINT(lval); | |
| 6755 #endif /* INT_VALBITS < INTBITS */ | |
| 802 | 6756 |
| 6757 *addr = val; | |
| 6758 free_opaque_ptr (opaque); | |
| 853 | 6759 free_cons (cons); |
| 802 | 6760 return Qnil; |
| 6761 } | |
| 6762 | |
| 6763 /* Establish an unwind-protect which will restore the int pointed to | |
| 6764 by ADDR with the value VAL. This function works correctly with | |
| 6765 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6766 int |
| 802 | 6767 record_unwind_protect_restoring_int (int *addr, int val) |
| 6768 { | |
| 6769 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6770 Lisp_Object lval; | |
| 6771 | |
| 4025 | 6772 /* In the event that a C integer will always fit in an Emacs int, we don't |
| 6773 ever want to store a C integer as an opaque pointer. This #ifdef | |
| 6774 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6775 integers have 32 value bits. */ | |
| 6776 #if INT_VALBITS <= INTBITS | |
| 802 | 6777 if (NUMBER_FITS_IN_AN_EMACS_INT (val)) |
| 6778 lval = make_int (val); | |
| 6779 else | |
| 6780 lval = make_opaque_ptr ((void *) val); | |
| 4025 | 6781 #else /* !(INT_VALBITS < INTBITS) */ |
| 6782 lval = make_int (val); | |
| 6783 #endif /* INT_VALBITS <= INTBITS */ | |
| 6784 | |
| 802 | 6785 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval)); |
| 6786 } | |
| 6787 | |
| 6788 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6789 Sets up an unwind-protect to restore the variable pointed to by | |
| 6790 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6791 Returns the previous value of specpdl_depth(); pass this to | |
| 6792 unbind_to() after you are done. This function works correctly with | |
| 6793 all ints, even those that don't fit into a Lisp integer. */ | |
| 6794 int | |
| 6795 internal_bind_int (int *addr, int newval) | |
| 6796 { | |
| 6797 int count = specpdl_depth (); | |
| 6798 record_unwind_protect_restoring_int (addr, *addr); | |
| 6799 *addr = newval; | |
| 6800 return count; | |
| 6801 } | |
| 6802 | |
| 6803 static Lisp_Object | |
| 771 | 6804 free_pointer (Lisp_Object opaque) |
| 6805 { | |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4969
diff
changeset
|
6806 xfree (get_opaque_ptr (opaque)); |
| 771 | 6807 free_opaque_ptr (opaque); |
| 6808 return Qnil; | |
| 6809 } | |
| 6810 | |
| 6811 /* Establish an unwind-protect which will free the specified block. | |
| 6812 */ | |
| 6813 int | |
| 6814 record_unwind_protect_freeing (void *ptr) | |
| 6815 { | |
| 6816 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6817 return record_unwind_protect (free_pointer, opaque); | |
| 6818 } | |
| 6819 | |
| 6820 static Lisp_Object | |
| 6821 free_dynarr (Lisp_Object opaque) | |
| 6822 { | |
| 6823 Dynarr_free (get_opaque_ptr (opaque)); | |
| 6824 free_opaque_ptr (opaque); | |
| 6825 return Qnil; | |
| 6826 } | |
| 6827 | |
| 6828 int | |
| 6829 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6830 { | |
| 6831 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6832 return record_unwind_protect (free_dynarr, opaque); | |
| 6833 } | |
| 428 | 6834 |
| 6835 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6836 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6837 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6838 Lisp_Object |
| 771 | 6839 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6840 { |
| 6841 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6842 check_specbind_stack_sanity (); |
| 428 | 6843 return value; |
| 6844 } | |
| 6845 | |
| 6846 /* Don't call this directly. | |
| 6847 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6848 void | |
| 6849 unbind_to_hairy (int count) | |
| 6850 { | |
| 442 | 6851 ++specpdl_ptr; |
| 6852 ++specpdl_depth_counter; | |
| 6853 | |
| 428 | 6854 while (specpdl_depth_counter != count) |
| 6855 { | |
| 1313 | 6856 Lisp_Object oquit = Qunbound; |
| 6857 | |
| 6858 /* Do this check BEFORE decrementing the values below, because once | |
| 6859 they're decremented, GC protection is lost on | |
| 6860 specpdl_ptr->old_value. */ | |
| 1322 | 6861 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6862 { |
| 6863 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6864 existing QUIT until afterwards. Only do this, however, for | |
| 6865 unwind-protects established by Lisp code, not by C code | |
| 6866 (e.g. free_opaque_ptr() or something), because the act of | |
| 6867 checking for QUIT can cause all sorts of weird things to | |
| 6868 happen, since it churns the event loop -- redisplay, running | |
| 6869 Lisp, etc. Code should not have to worry about this just | |
| 6870 because of establishing an unwind-protect. */ | |
| 6871 check_quit (); /* make Vquit_flag accurate */ | |
| 6872 oquit = Vquit_flag; | |
| 6873 Vquit_flag = Qnil; | |
| 6874 } | |
| 6875 | |
| 428 | 6876 --specpdl_ptr; |
| 6877 --specpdl_depth_counter; | |
| 6878 | |
| 1313 | 6879 /* #### At this point, there is no GC protection on old_value. This |
| 6880 could be a real problem, depending on what unwind-protect function | |
| 6881 is called. It looks like it just so happens that the ones | |
| 6882 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6883 we should look into fixing this. (Many unwind-protect functions | |
| 6884 free values. Is it a problem if freed values are | |
| 6885 GC-protected?) */ | |
| 428 | 6886 if (specpdl_ptr->func != 0) |
| 1313 | 6887 { |
| 6888 /* An unwind-protect */ | |
| 6889 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6890 } | |
| 6891 | |
| 428 | 6892 else |
| 6893 { | |
| 6894 /* We checked symbol for validity when we specbound it, | |
| 6895 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6896 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6897 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6898 sym->value = specpdl_ptr->old_value; | |
| 6899 else | |
| 6900 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6901 } | |
| 6902 | |
| 6903 #if 0 /* martin */ | |
| 6904 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6905 /* There should never be anything here for us to remove. | |
| 6906 If so, it indicates a logic error in Emacs. Catches | |
| 6907 should get removed when a throw or signal occurs, or | |
| 6908 when a catch or condition-case exits normally. But | |
| 6909 it's too dangerous to just remove this code. --ben */ | |
| 6910 | |
| 6911 /* Furthermore, this code is not in FSFmacs!!! | |
| 6912 Braino on mly's part? */ | |
| 6913 /* If we're unwound past the pdlcount of a catch frame, | |
| 6914 that catch can't possibly still be valid. */ | |
| 6915 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6916 { | |
| 6917 catchlist = catchlist->next; | |
| 6918 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6919 } | |
| 6920 #endif | |
| 6921 #endif | |
| 1313 | 6922 |
| 6923 if (!UNBOUNDP (oquit)) | |
| 6924 Vquit_flag = oquit; | |
| 428 | 6925 } |
| 853 | 6926 check_specbind_stack_sanity (); |
| 428 | 6927 } |
| 6928 | |
| 6929 | |
| 6930 | |
| 6931 /* Get the value of symbol's global binding, even if that binding is | |
| 6932 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6933 | |
| 6934 Lisp_Object | |
| 6935 top_level_value (Lisp_Object symbol) | |
| 6936 { | |
| 6937 REGISTER struct specbinding *ptr = specpdl; | |
| 6938 | |
| 6939 CHECK_SYMBOL (symbol); | |
| 6940 for (; ptr != specpdl_ptr; ptr++) | |
| 6941 { | |
| 6942 if (EQ (ptr->symbol, symbol)) | |
| 6943 return ptr->old_value; | |
| 6944 } | |
| 6945 return XSYMBOL (symbol)->value; | |
| 6946 } | |
| 6947 | |
| 6948 #if 0 | |
| 6949 | |
| 6950 Lisp_Object | |
| 6951 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6952 { | |
| 6953 REGISTER struct specbinding *ptr = specpdl; | |
| 6954 | |
| 6955 CHECK_SYMBOL (symbol); | |
| 6956 for (; ptr != specpdl_ptr; ptr++) | |
| 6957 { | |
| 6958 if (EQ (ptr->symbol, symbol)) | |
| 6959 { | |
| 6960 ptr->old_value = newval; | |
| 6961 return newval; | |
| 6962 } | |
| 6963 } | |
| 6964 return Fset (symbol, newval); | |
| 6965 } | |
| 6966 | |
| 6967 #endif /* 0 */ | |
| 6968 | |
| 6969 | |
| 6970 /************************************************************************/ | |
| 6971 /* Backtraces */ | |
| 6972 /************************************************************************/ | |
| 6973 | |
| 6974 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 6975 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 6976 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 6977 */ | |
| 6978 (level, flag)) | |
| 6979 { | |
| 6980 REGISTER struct backtrace *backlist = backtrace_list; | |
| 6981 REGISTER int i; | |
| 6982 | |
| 6983 CHECK_INT (level); | |
| 6984 | |
| 6985 for (i = 0; backlist && i < XINT (level); i++) | |
| 6986 { | |
| 6987 backlist = backlist->next; | |
| 6988 } | |
| 6989 | |
| 6990 if (backlist) | |
| 6991 backlist->debug_on_exit = !NILP (flag); | |
| 6992 | |
| 6993 return flag; | |
| 6994 } | |
| 6995 | |
| 6996 static void | |
| 6997 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 6998 { | |
| 6999 int printing_bindings = 0; | |
| 7000 | |
| 7001 for (; speccount > speclimit; speccount--) | |
| 7002 { | |
| 7003 if (specpdl[speccount - 1].func == 0 | |
| 7004 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7005 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7006 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7007 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7008 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7009 printing_bindings = 1; | |
| 7010 } | |
| 7011 else | |
| 7012 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7013 if (printing_bindings) write_ascstring (stream, ")\n"); |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7014 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7015 printing_bindings = 0; |
| 7016 } | |
| 7017 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7018 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7019 } |
| 7020 | |
| 1292 | 7021 static Lisp_Object |
| 7022 backtrace_unevalled_args (Lisp_Object *args) | |
| 7023 { | |
| 7024 if (args) | |
| 7025 return *args; | |
| 7026 else | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7027 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7028 } |
| 7029 | |
| 428 | 7030 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7031 Print a trace of Lisp function calls currently active. | |
| 438 | 7032 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7033 and defaults to the value of `standard-output'. |
| 7034 Optional second arg DETAILED non-nil means show places where currently | |
| 7035 active variable bindings, catches, condition-cases, and | |
| 7036 unwind-protects, as well as function calls, were made. | |
| 428 | 7037 */ |
| 7038 (stream, detailed)) | |
| 7039 { | |
| 7040 /* This function can GC */ | |
| 7041 struct backtrace *backlist = backtrace_list; | |
| 7042 struct catchtag *catches = catchlist; | |
| 7043 int speccount = specpdl_depth(); | |
| 7044 | |
| 7045 int old_nl = print_escape_newlines; | |
| 7046 int old_pr = print_readably; | |
| 7047 Lisp_Object old_level = Vprint_level; | |
| 7048 Lisp_Object oiq = Vinhibit_quit; | |
| 7049 struct gcpro gcpro1, gcpro2; | |
| 7050 | |
| 7051 /* We can't allow quits in here because that could cause the values | |
| 7052 of print_readably and print_escape_newlines to get screwed up. | |
| 7053 Normally we would use a record_unwind_protect but that would | |
| 7054 screw up the functioning of this function. */ | |
| 7055 Vinhibit_quit = Qt; | |
| 7056 | |
| 7057 entering_debugger = 0; | |
| 7058 | |
| 872 | 7059 if (!NILP (detailed)) |
| 7060 Vprint_level = make_int (50); | |
| 7061 else | |
| 7062 Vprint_level = make_int (3); | |
| 428 | 7063 print_readably = 0; |
| 7064 print_escape_newlines = 1; | |
| 7065 | |
| 7066 GCPRO2 (stream, old_level); | |
| 7067 | |
| 1261 | 7068 stream = canonicalize_printcharfun (stream); |
| 428 | 7069 |
| 7070 for (;;) | |
| 7071 { | |
| 7072 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7073 { | |
| 7074 int catchpdl = catches->pdlcount; | |
| 438 | 7075 if (speccount > catchpdl |
| 7076 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7077 /* This is a condition-case catchpoint */ |
| 7078 catchpdl = catchpdl + 1; | |
| 7079 | |
| 7080 backtrace_specials (speccount, catchpdl, stream); | |
| 7081 | |
| 7082 speccount = catches->pdlcount; | |
| 7083 if (catchpdl == speccount) | |
| 7084 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7085 write_ascstring (stream, " # (catch "); |
| 428 | 7086 Fprin1 (catches->tag, stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7087 write_ascstring (stream, " ...)\n"); |
| 428 | 7088 } |
| 7089 else | |
| 7090 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7091 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7092 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7093 write_ascstring (stream, ")\n"); |
| 428 | 7094 } |
| 7095 catches = catches->next; | |
| 7096 } | |
| 7097 else if (!backlist) | |
| 7098 break; | |
| 7099 else | |
| 7100 { | |
| 7101 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7102 { | |
| 7103 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7104 speccount = backlist->pdlcount; | |
| 7105 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7106 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7107 if (backlist->nargs == UNEVALLED) |
| 7108 { | |
| 1292 | 7109 Fprin1 (Fcons (*backlist->function, |
| 7110 backtrace_unevalled_args (backlist->args)), | |
| 7111 stream); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7112 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7113 } |
| 7114 else | |
| 7115 { | |
| 7116 Lisp_Object tem = *backlist->function; | |
| 7117 Fprin1 (tem, stream); /* This can QUIT */ | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7118 write_ascstring (stream, "("); |
| 428 | 7119 if (backlist->nargs == MANY) |
| 7120 { | |
| 7121 int i; | |
| 7122 Lisp_Object tail = Qnil; | |
| 7123 struct gcpro ngcpro1; | |
| 7124 | |
| 7125 NGCPRO1 (tail); | |
| 7126 for (tail = *backlist->args, i = 0; | |
| 7127 !NILP (tail); | |
| 7128 tail = Fcdr (tail), i++) | |
| 7129 { | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7130 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7131 Fprin1 (Fcar (tail), stream); |
| 7132 } | |
| 7133 NUNGCPRO; | |
| 7134 } | |
| 7135 else | |
| 7136 { | |
| 7137 int i; | |
| 7138 for (i = 0; i < backlist->nargs; i++) | |
| 7139 { | |
| 826 | 7140 if (!i && EQ (tem, Qbyte_code)) |
| 7141 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7142 write_ascstring (stream, "\"...\""); |
| 826 | 7143 continue; |
| 7144 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7145 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7146 Fprin1 (backlist->args[i], stream); |
| 7147 } | |
| 7148 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7149 write_ascstring (stream, ")\n"); |
| 428 | 7150 } |
| 7151 backlist = backlist->next; | |
| 7152 } | |
| 7153 } | |
| 7154 Vprint_level = old_level; | |
| 7155 print_readably = old_pr; | |
| 7156 print_escape_newlines = old_nl; | |
| 7157 UNGCPRO; | |
| 7158 Vinhibit_quit = oiq; | |
| 7159 return Qnil; | |
| 7160 } | |
| 7161 | |
| 7162 | |
| 444 | 7163 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7164 Return the function and arguments NFRAMES up from current execution point. | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7165 If that frame has not evaluated the arguments yet (or involves a special |
|
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7166 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7167 If that frame has evaluated its arguments and called its function already, |
| 7168 the value is (t FUNCTION ARG-VALUES...). | |
| 7169 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7170 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7171 or a lambda expression for macro calls. | |
| 444 | 7172 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7173 */ |
| 7174 (nframes)) | |
| 7175 { | |
| 7176 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7177 REGISTER int i; | |
| 7178 Lisp_Object tem; | |
| 7179 | |
| 7180 CHECK_NATNUM (nframes); | |
| 7181 | |
| 7182 /* Find the frame requested. */ | |
| 7183 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7184 backlist = backlist->next; | |
| 7185 | |
| 7186 if (!backlist) | |
| 7187 return Qnil; | |
| 7188 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7189 return Fcons (Qnil, Fcons (*backlist->function, |
| 7190 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7191 else |
| 7192 { | |
| 7193 if (backlist->nargs == MANY) | |
| 7194 tem = *backlist->args; | |
| 7195 else | |
| 7196 tem = Flist (backlist->nargs, backlist->args); | |
| 7197 | |
| 7198 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7199 } | |
| 7200 } | |
| 7201 | |
| 7202 | |
| 7203 /************************************************************************/ | |
| 7204 /* Warnings */ | |
| 7205 /************************************************************************/ | |
| 7206 | |
| 1123 | 7207 static int |
| 7208 warning_will_be_discarded (Lisp_Object level) | |
| 7209 { | |
| 7210 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7211 to avoid excessive consing. */ | |
| 7212 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7213 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7214 } | |
| 7215 | |
| 428 | 7216 void |
| 1204 | 7217 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7218 Lisp_Object obj) |
| 7219 { | |
| 1123 | 7220 if (warning_will_be_discarded (level)) |
| 793 | 7221 return; |
| 1123 | 7222 |
| 1204 | 7223 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7224 if (NILP (Vpending_warnings)) |
| 7225 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7226 else | |
| 7227 { | |
| 7228 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7229 Vpending_warnings_tail = obj; | |
| 7230 } | |
| 7231 } | |
| 7232 | |
| 7233 /* #### This should probably accept Lisp objects; but then we have | |
| 7234 to make sure that Feval() isn't called, since it might not be safe. | |
| 7235 | |
| 7236 An alternative approach is to just pass some non-string type of | |
| 7237 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7238 automatically be called when it is safe to do so. */ | |
| 7239 | |
| 7240 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7241 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7242 { |
| 7243 Lisp_Object obj; | |
| 7244 va_list args; | |
| 7245 | |
| 1123 | 7246 if (warning_will_be_discarded (level)) |
| 793 | 7247 return; |
| 1123 | 7248 |
| 428 | 7249 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7250 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7251 va_end (args); |
| 7252 | |
| 1204 | 7253 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7254 } |
| 7255 | |
| 7256 | |
| 7257 | |
| 7258 | |
| 7259 /************************************************************************/ | |
| 7260 /* Initialization */ | |
| 7261 /************************************************************************/ | |
| 7262 | |
| 7263 void | |
| 7264 syms_of_eval (void) | |
| 7265 { | |
| 442 | 7266 INIT_LRECORD_IMPLEMENTATION (subr); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7267 INIT_LRECORD_IMPLEMENTATION (multiple_value); |
| 442 | 7268 |
| 563 | 7269 DEFSYMBOL (Qinhibit_quit); |
| 7270 DEFSYMBOL (Qautoload); | |
| 7271 DEFSYMBOL (Qdebug_on_error); | |
| 7272 DEFSYMBOL (Qstack_trace_on_error); | |
| 7273 DEFSYMBOL (Qdebug_on_signal); | |
| 7274 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7275 DEFSYMBOL (Qdebugger); | |
| 7276 DEFSYMBOL (Qmacro); | |
| 428 | 7277 defsymbol (&Qand_rest, "&rest"); |
| 7278 defsymbol (&Qand_optional, "&optional"); | |
| 7279 /* Note that the process code also uses Qexit */ | |
| 563 | 7280 DEFSYMBOL (Qexit); |
| 7281 DEFSYMBOL (Qsetq); | |
| 7282 DEFSYMBOL (Qinteractive); | |
| 7283 DEFSYMBOL (Qcommandp); | |
| 7284 DEFSYMBOL (Qdefun); | |
| 7285 DEFSYMBOL (Qprogn); | |
| 7286 DEFSYMBOL (Qvalues); | |
| 7287 DEFSYMBOL (Qdisplay_warning); | |
| 7288 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7289 DEFSYMBOL (Qfinalize_list); |
| 563 | 7290 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7291 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7292 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7293 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7294 |
| 7295 DEFSUBR (For); | |
| 7296 DEFSUBR (Fand); | |
| 7297 DEFSUBR (Fif); | |
| 7298 DEFSUBR_MACRO (Fwhen); | |
| 7299 DEFSUBR_MACRO (Funless); | |
| 7300 DEFSUBR (Fcond); | |
| 7301 DEFSUBR (Fprogn); | |
| 7302 DEFSUBR (Fprog1); | |
| 7303 DEFSUBR (Fprog2); | |
| 7304 DEFSUBR (Fsetq); | |
| 7305 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7306 DEFSUBR (Fquote_maybe); |
| 428 | 7307 DEFSUBR (Ffunction); |
| 7308 DEFSUBR (Fdefun); | |
| 7309 DEFSUBR (Fdefmacro); | |
| 7310 DEFSUBR (Fdefvar); | |
| 7311 DEFSUBR (Fdefconst); | |
| 7312 DEFSUBR (Flet); | |
| 7313 DEFSUBR (FletX); | |
| 7314 DEFSUBR (Fwhile); | |
| 7315 DEFSUBR (Fmacroexpand_internal); | |
| 7316 DEFSUBR (Fcatch); | |
| 7317 DEFSUBR (Fthrow); | |
| 7318 DEFSUBR (Funwind_protect); | |
| 7319 DEFSUBR (Fcondition_case); | |
| 7320 DEFSUBR (Fcall_with_condition_handler); | |
| 7321 DEFSUBR (Fsignal); | |
| 7322 DEFSUBR (Finteractive_p); | |
| 7323 DEFSUBR (Fcommandp); | |
| 7324 DEFSUBR (Fcommand_execute); | |
| 7325 DEFSUBR (Fautoload); | |
| 7326 DEFSUBR (Feval); | |
| 7327 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7328 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7329 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7330 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7331 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7332 DEFSUBR (Fvalues_list); |
| 428 | 7333 DEFSUBR (Ffuncall); |
| 7334 DEFSUBR (Ffunctionp); | |
| 7335 DEFSUBR (Ffunction_min_args); | |
| 7336 DEFSUBR (Ffunction_max_args); | |
| 7337 DEFSUBR (Frun_hooks); | |
| 7338 DEFSUBR (Frun_hook_with_args); | |
| 7339 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7340 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7341 DEFSUBR (Fbacktrace_debug); | |
| 7342 DEFSUBR (Fbacktrace); | |
| 7343 DEFSUBR (Fbacktrace_frame); | |
| 7344 } | |
| 7345 | |
| 7346 void | |
| 814 | 7347 init_eval_semi_early (void) |
| 428 | 7348 { |
| 7349 specpdl_ptr = specpdl; | |
| 7350 specpdl_depth_counter = 0; | |
| 7351 catchlist = 0; | |
| 7352 Vcondition_handlers = Qnil; | |
| 7353 backtrace_list = 0; | |
| 7354 Vquit_flag = Qnil; | |
| 7355 debug_on_next_call = 0; | |
| 7356 lisp_eval_depth = 0; | |
| 7357 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7358 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7359 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7360 multiple_value_current_limit = 1; |
| 428 | 7361 } |
| 7362 | |
| 7363 void | |
| 7364 reinit_vars_of_eval (void) | |
| 7365 { | |
| 7366 preparing_for_armageddon = 0; | |
| 7367 in_warnings = 0; | |
| 7368 specpdl_size = 50; | |
| 7369 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7370 /* XEmacs change: increase these values. */ | |
| 7371 max_specpdl_size = 3000; | |
| 442 | 7372 max_lisp_eval_depth = 1000; |
| 7373 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7374 throw_level = 0; |
| 7375 #endif | |
| 2367 | 7376 init_eval_semi_early (); |
| 428 | 7377 } |
| 7378 | |
| 7379 void | |
| 7380 vars_of_eval (void) | |
| 7381 { | |
| 7382 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7383 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7384 */ ); | |
| 7385 | |
| 7386 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7387 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7388 This limit is to catch infinite recursions for you before they cause | |
| 7389 actual stack overflow in C, which would be fatal for Emacs. | |
| 7390 You can safely make it considerably larger than its default value, | |
| 7391 if that proves inconveniently small. | |
| 7392 */ ); | |
| 7393 | |
| 7394 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7395 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7396 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7397 Normally, you do not need to set this value yourself. It is set to | |
| 7398 t each time a Control-G is detected, and to `critical' each time a | |
| 7399 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7400 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7401 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7402 it's correct to do so. |
| 428 | 7403 */ ); |
| 7404 Vquit_flag = Qnil; | |
| 7405 | |
| 7406 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7407 Non-nil inhibits C-g quitting from happening immediately. | |
| 7408 Note that `quit-flag' will still be set by typing C-g, | |
| 7409 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7410 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7411 before making `inhibit-quit' nil. |
| 7412 | |
| 7413 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7414 requested by typing control-shift-G in a window-system frame; | |
| 7415 this is explained in more detail in `quit-flag'. | |
| 428 | 7416 */ ); |
| 7417 Vinhibit_quit = Qnil; | |
| 7418 | |
| 7419 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7420 *Non-nil means automatically display a backtrace buffer | |
| 7421 after any error that is not handled by a `condition-case'. | |
| 7422 If the value is a list, an error only means to display a backtrace | |
| 7423 if one of its condition symbols appears in the list. | |
| 7424 See also variable `stack-trace-on-signal'. | |
| 7425 */ ); | |
| 7426 Vstack_trace_on_error = Qnil; | |
| 7427 | |
| 7428 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7429 *Non-nil means automatically display a backtrace buffer | |
| 7430 after any error that is signalled, whether or not it is handled by | |
| 7431 a `condition-case'. | |
| 7432 If the value is a list, an error only means to display a backtrace | |
| 7433 if one of its condition symbols appears in the list. | |
| 7434 See also variable `stack-trace-on-error'. | |
| 7435 */ ); | |
| 7436 Vstack_trace_on_signal = Qnil; | |
| 7437 | |
| 7438 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7439 *List of errors for which the debugger should not be called. | |
| 7440 Each element may be a condition-name or a regexp that matches error messages. | |
| 7441 If any element applies to a given error, that error skips the debugger | |
| 7442 and just returns to top level. | |
| 7443 This overrides the variable `debug-on-error'. | |
| 7444 It does not apply to errors handled by `condition-case'. | |
| 7445 */ ); | |
| 7446 Vdebug_ignored_errors = Qnil; | |
| 7447 | |
| 7448 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7449 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7450 The debugger will not be entered if the error is handled by | |
| 7451 a `condition-case'. | |
| 7452 If the value is a list, an error only means to enter the debugger | |
| 7453 if one of its condition symbols appears in the list. | |
| 7454 This variable is overridden by `debug-ignored-errors'. | |
| 7455 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7456 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7457 Process filters are considered to be outside of condition-case forms |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7458 (unless contained in the process filter itself). To prevent the |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7459 debugger from being called from a process filter, use a list value, or |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7460 put the expected error\(s) in `debug-ignored-errors'. |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7461 |
| 1123 | 7462 If this variable is set while XEmacs is running noninteractively (using |
| 7463 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7464 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7465 obviously won't work), XEmacs will break out to a C debugger using | |
| 7466 \(force-debugging-signal t). This is useful because debugging | |
| 7467 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7468 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7469 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7470 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7471 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7472 is about to die anyway, and if no debugger is present, this will usefully | |
| 7473 dump core.) The most useful way to set this flag when debugging | |
| 7474 noninteractive runs, especially in makefiles, is using the environment | |
| 7475 variable XEMACSDEBUG, like this: | |
| 771 | 7476 |
| 7477 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7478 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7479 */ ); |
| 7480 Vdebug_on_error = Qnil; | |
| 7481 | |
| 7482 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7483 *Non-nil means enter debugger if an error is signalled. | |
| 7484 The debugger will be entered whether or not the error is handled by | |
| 7485 a `condition-case'. | |
| 7486 If the value is a list, an error only means to enter the debugger | |
| 7487 if one of its condition symbols appears in the list. | |
| 7488 See also variable `debug-on-quit'. | |
| 1123 | 7489 |
| 7490 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7491 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7492 */ ); |
| 7493 Vdebug_on_signal = Qnil; | |
| 7494 | |
| 7495 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7496 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7497 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7498 debugger can also be achieved at any time (for X11 console) by typing | |
| 7499 control-shift-G to signal a critical quit. | |
| 7500 */ ); | |
| 7501 debug_on_quit = 0; | |
| 7502 | |
| 7503 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7504 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7505 */ ); | |
| 7506 | |
| 1292 | 7507 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7508 &backtrace_with_internal_sections /* | |
| 7509 Non-nil means backtraces will contain additional information indicating | |
| 7510 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7511 byte-char conversion, internal-external conversion, etc. This can be | |
| 7512 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7513 */ ); | |
| 7514 #ifdef ERROR_CHECK_STRUCTURES | |
| 7515 backtrace_with_internal_sections = 1; | |
| 7516 #else | |
| 7517 backtrace_with_internal_sections = 0; | |
| 7518 #endif | |
| 7519 | |
| 428 | 7520 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7521 Function to call to invoke debugger. | |
| 7522 If due to frame exit, args are `exit' and the value being returned; | |
| 7523 this function's value will be returned instead of that. | |
| 7524 If due to error, args are `error' and a list of the args to `signal'. | |
| 7525 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7526 If due to `eval' entry, one arg, t. | |
| 7527 */ ); | |
| 7528 Vdebugger = Qnil; | |
| 7529 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7530 DEFVAR_CONST_INT ("multiple-values-limit", &Vmultiple_values_limit /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7531 The exclusive upper bound on the number of multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7532 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7533 This applies to `values', `values-list', `multiple-value-bind' and related |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7534 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7535 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7536 Vmultiple_values_limit = EMACS_INT_MAX > INT_MAX ? INT_MAX : EMACS_INT_MAX; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7537 |
| 853 | 7538 staticpro (&Vcatch_everything_tag); |
| 7539 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7540 | |
| 428 | 7541 staticpro (&Vpending_warnings); |
| 7542 Vpending_warnings = Qnil; | |
| 1204 | 7543 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7544 Vpending_warnings_tail = Qnil; |
| 7545 | |
| 793 | 7546 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7547 Vlog_warning_minimum_level = Qinfo; | |
| 7548 | |
| 428 | 7549 staticpro (&Vautoload_queue); |
| 7550 Vautoload_queue = Qnil; | |
| 7551 | |
| 7552 staticpro (&Vcondition_handlers); | |
| 7553 | |
| 853 | 7554 staticpro (&Vdeletable_permanent_display_objects); |
| 7555 Vdeletable_permanent_display_objects = Qnil; | |
| 7556 | |
| 7557 staticpro (&Vmodifiable_buffers); | |
| 7558 Vmodifiable_buffers = Qnil; | |
| 7559 | |
| 7560 inhibit_flags = 0; | |
| 7561 } |