Mercurial > hg > xemacs-beta
annotate src/lread.c @ 4923:8ee3c10d1ed5
remove old no-longer-useful kludgy compiled-fun annotations hack
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-03 Ben Wing <ben@xemacs.org>
* alloc.c (Fmake_byte_code):
* lread.c:
* lread.c (readevalloop):
* lread.c (Fread):
* lread.c (Fread_from_string):
* lread.c (read_list_conser):
* lread.c (read_list):
* lread.c (vars_of_lread):
Remove the old kludgy stuff bracketed by `#ifdef
COMPILED_FUNCTION_ANNOTATION_HACK_OLD_WAY'.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Wed, 03 Feb 2010 08:50:00 -0600 |
| parents | 17362f371cc2 |
| children | cbe181529c34 |
| rev | line source |
|---|---|
| 428 | 1 /* Lisp parsing and input streams. |
| 2 Copyright (C) 1985-1989, 1992-1995 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Tinker Systems. | |
|
4921
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4844
diff
changeset
|
4 Copyright (C) 1996, 2001, 2002, 2003, 2010 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: Mule 2.0, FSF 19.30. */ | |
| 24 | |
| 25 /* This file has been Mule-ized. */ | |
| 26 | |
| 27 #include <config.h> | |
| 28 #include "lisp.h" | |
| 29 | |
| 30 #include "buffer.h" | |
| 31 #include "bytecode.h" | |
| 32 #include "elhash.h" | |
| 1292 | 33 #include "file-coding.h" |
| 428 | 34 #include "lstream.h" |
| 35 #include "opaque.h" | |
| 1292 | 36 #include "profile.h" |
| 3439 | 37 #include "charset.h" /* For Funicode_to_char. */ |
| 428 | 38 |
| 39 #include "sysfile.h" | |
| 40 #include "sysfloat.h" | |
| 771 | 41 #ifdef WIN32_NATIVE |
| 42 #include "syswindows.h" | |
| 43 #endif | |
| 428 | 44 |
| 45 Lisp_Object Qread_char, Qstandard_input; | |
| 46 Lisp_Object Qvariable_documentation; | |
| 47 #define LISP_BACKQUOTES | |
| 48 #ifdef LISP_BACKQUOTES | |
| 49 /* | |
| 50 Nonzero means inside a new-style backquote | |
| 51 with no surrounding parentheses. | |
| 52 Fread initializes this to zero, so we need not specbind it | |
| 53 or worry about what happens to it when there is an error. | |
| 54 | |
| 55 XEmacs: | |
| 56 Nested backquotes are perfectly legal and fail utterly with | |
| 57 this silliness. */ | |
| 58 static int new_backquote_flag, old_backquote_flag; | |
| 59 Lisp_Object Qbackquote, Qbacktick, Qcomma, Qcomma_at, Qcomma_dot; | |
| 60 #endif | |
| 61 Lisp_Object Qvariable_domain; /* I18N3 */ | |
| 62 Lisp_Object Vvalues, Vstandard_input, Vafter_load_alist; | |
| 2548 | 63 Lisp_Object Vload_suppress_alist; |
| 64 Lisp_Object Qload, Qload_internal, Qfset; | |
| 428 | 65 |
| 66 /* Hash-table that maps directory names to hashes of their contents. */ | |
| 67 static Lisp_Object Vlocate_file_hash_table; | |
| 68 | |
| 69 Lisp_Object Qexists, Qreadable, Qwritable, Qexecutable; | |
| 70 | |
| 71 /* See read_escape() for an explanation of this. */ | |
| 72 #if 0 | |
| 73 int fail_on_bucky_bit_character_escapes; | |
| 74 #endif | |
| 75 | |
| 76 /* This symbol is also used in fns.c */ | |
| 77 #define FEATUREP_SYNTAX | |
| 78 | |
| 79 #ifdef FEATUREP_SYNTAX | |
| 80 Lisp_Object Qfeaturep; | |
| 81 #endif | |
| 82 | |
| 83 /* non-zero if inside `load' */ | |
| 84 int load_in_progress; | |
| 85 | |
| 86 /* Whether Fload_internal() should check whether the .el is newer | |
| 87 when loading .elc */ | |
| 88 int load_warn_when_source_newer; | |
| 89 /* Whether Fload_internal() should check whether the .elc doesn't exist */ | |
| 90 int load_warn_when_source_only; | |
| 91 /* Whether Fload_internal() should ignore .elc files when no suffix is given */ | |
| 92 int load_ignore_elc_files; | |
| 1123 | 93 /* Whether Fload_internal() should ignore out-of-date .elc files when no |
| 94 suffix is given */ | |
| 95 int load_ignore_out_of_date_elc_files; | |
| 96 /* Always display messages showing when a file is loaded, regardless of | |
| 97 whether the flag to `load' tries to suppress them. */ | |
| 98 int load_always_display_messages; | |
| 99 /* Show the full path in loading messages. */ | |
| 100 int load_show_full_path_in_messages; | |
| 428 | 101 |
| 102 /* Search path for files to be loaded. */ | |
| 103 Lisp_Object Vload_path; | |
| 104 | |
| 105 /* Search path for files when dumping. */ | |
| 106 /* Lisp_Object Vdump_load_path; */ | |
| 107 | |
| 108 /* This is the user-visible association list that maps features to | |
| 109 lists of defs in their load files. */ | |
| 110 Lisp_Object Vload_history; | |
| 111 | |
| 112 /* This is used to build the load history. */ | |
| 113 Lisp_Object Vcurrent_load_list; | |
| 114 | |
| 115 /* Name of file actually being read by `load'. */ | |
| 116 Lisp_Object Vload_file_name; | |
| 117 | |
| 118 /* Same as Vload_file_name but not Lisp-accessible. This ensures that | |
| 119 our #$ checks are reliable. */ | |
| 120 Lisp_Object Vload_file_name_internal; | |
| 121 | |
| 122 /* Function to use for reading, in `load' and friends. */ | |
| 123 Lisp_Object Vload_read_function; | |
| 124 | |
| 125 /* The association list of objects read with the #n=object form. | |
| 126 Each member of the list has the form (n . object), and is used to | |
| 127 look up the object for the corresponding #n# construct. | |
| 128 It must be set to nil before all top-level calls to read0. */ | |
| 129 Lisp_Object Vread_objects; | |
| 130 | |
| 131 /* Nonzero means load should forcibly load all dynamic doc strings. */ | |
| 132 /* Note that this always happens (with some special behavior) when | |
| 133 purify_flag is set. */ | |
| 134 static int load_force_doc_strings; | |
| 135 | |
| 136 /* List of descriptors now open for Fload_internal. */ | |
| 137 static Lisp_Object Vload_descriptor_list; | |
| 138 | |
| 139 /* In order to implement "load_force_doc_strings", we keep | |
| 140 a list of all the compiled-function objects and such | |
| 141 that we have created in the process of loading this file. | |
| 142 See the rant below. | |
| 143 | |
| 144 We specbind this just like Vload_file_name, so there's no | |
| 145 problems with recursive loading. */ | |
| 146 static Lisp_Object Vload_force_doc_string_list; | |
| 147 | |
| 148 /* A resizing-buffer stream used to temporarily hold data while reading */ | |
| 149 static Lisp_Object Vread_buffer_stream; | |
| 150 | |
| 151 static int load_byte_code_version; | |
| 152 | |
| 153 /* An array describing all known built-in structure types */ | |
| 154 static structure_type_dynarr *the_structure_type_dynarr; | |
| 155 | |
| 156 #if 0 /* FSF stuff */ | |
| 157 /* For use within read-from-string (this reader is non-reentrant!!) */ | |
| 158 static int read_from_string_index; | |
| 159 static int read_from_string_limit; | |
| 160 #endif | |
| 161 | |
| 162 #if 0 /* More FSF implementation kludges. */ | |
| 163 /* In order to implement load-force-doc-string, FSF saves the | |
| 164 #@-quoted string when it's seen, and goes back and retrieves | |
| 165 it later. | |
| 166 | |
| 167 This approach is not only kludgy, but it in general won't work | |
| 168 correctly because there's no stack of remembered #@-quoted-strings | |
| 169 and those strings don't generally appear in the file in the same | |
| 170 order as their #$ references. (Yes, that is amazingly stupid too. | |
| 171 | |
| 172 It would be trivially easy to always encode the #@ string | |
| 173 [which is a comment, anyway] in the middle of the (#$ . INT) cons | |
| 174 reference. That way, it would be really easy to implement | |
| 175 load-force-doc-string in a non-kludgy way by just retrieving the | |
| 176 string immediately, because it's delivered on a silver platter.) | |
| 177 | |
| 178 And finally, this stupid approach doesn't work under Mule, or | |
| 179 under MS-DOS or Windows NT, or under VMS, or any other place | |
| 180 where you either can't do an ftell() or don't get back a byte | |
| 181 count. | |
| 182 | |
| 183 Oh, and one more lossage in this approach: If you attempt to | |
| 184 dump any ELC files that were compiled with `byte-compile-dynamic' | |
| 185 (as opposed to just `byte-compile-dynamic-docstring'), you | |
| 186 get hosed. FMH! (as the illustrious JWZ was prone to utter) | |
| 187 | |
| 188 The approach we use is clean, solves all of these problems, and is | |
| 189 probably easier to implement anyway. We just save a list of all | |
| 190 the containing objects that have (#$ . INT) conses in them (this | |
| 191 will only be compiled-function objects and lists), and when the | |
| 192 file is finished loading, we go through and fill in all the | |
| 814 | 193 doc strings at once. --ben */ |
| 428 | 194 |
| 195 /* This contains the last string skipped with #@. */ | |
| 196 static char *saved_doc_string; | |
| 197 /* Length of buffer allocated in saved_doc_string. */ | |
| 198 static int saved_doc_string_size; | |
| 199 /* Length of actual data in saved_doc_string. */ | |
| 200 static int saved_doc_string_length; | |
| 201 /* This is the file position that string came from. */ | |
| 202 static int saved_doc_string_position; | |
| 203 #endif | |
| 204 | |
| 1123 | 205 static int locate_file_open_or_access_file (Ibyte *fn, int access_mode); |
| 428 | 206 EXFUN (Fread_from_string, 3); |
| 207 | |
| 208 /* When errors are signaled, the actual readcharfun should not be used | |
| 209 as an argument if it is an lstream, so that lstreams don't escape | |
| 210 to the Lisp level. */ | |
| 1261 | 211 #define READCHARFUN_MAYBE(x) (LSTREAMP (x) \ |
| 212 ? (build_msg_string ("internal input stream")) \ | |
| 428 | 213 : (x)) |
| 214 | |
| 215 | |
| 2268 | 216 static DECLARE_DOESNT_RETURN (read_syntax_error (const char *)); |
| 217 | |
| 428 | 218 static DOESNT_RETURN |
| 442 | 219 read_syntax_error (const char *string) |
| 428 | 220 { |
| 563 | 221 signal_error (Qinvalid_read_syntax, string, Qunbound); |
| 428 | 222 } |
| 223 | |
| 224 static Lisp_Object | |
| 442 | 225 continuable_read_syntax_error (const char *string) |
| 428 | 226 { |
| 563 | 227 return signal_continuable_error (Qinvalid_read_syntax, string, Qunbound); |
| 428 | 228 } |
| 229 | |
| 230 | |
| 231 /* Handle unreading and rereading of characters. */ | |
| 867 | 232 static Ichar |
| 428 | 233 readchar (Lisp_Object readcharfun) |
| 234 { | |
| 235 /* This function can GC */ | |
| 236 | |
| 237 if (BUFFERP (readcharfun)) | |
| 238 { | |
| 867 | 239 Ichar c; |
| 428 | 240 struct buffer *b = XBUFFER (readcharfun); |
| 241 | |
| 242 if (!BUFFER_LIVE_P (b)) | |
| 563 | 243 invalid_operation ("Reading from killed buffer", Qunbound); |
| 428 | 244 |
| 245 if (BUF_PT (b) >= BUF_ZV (b)) | |
| 246 return -1; | |
| 247 c = BUF_FETCH_CHAR (b, BUF_PT (b)); | |
| 248 BUF_SET_PT (b, BUF_PT (b) + 1); | |
| 249 | |
| 250 return c; | |
| 251 } | |
| 252 else if (LSTREAMP (readcharfun)) | |
| 253 { | |
| 867 | 254 Ichar c = Lstream_get_ichar (XLSTREAM (readcharfun)); |
| 428 | 255 #ifdef DEBUG_XEMACS /* testing Mule */ |
| 256 static int testing_mule = 0; /* Change via debugger */ | |
| 444 | 257 if (testing_mule) |
| 258 { | |
| 259 if (c >= 0x20 && c <= 0x7E) stderr_out ("%c", c); | |
| 260 else if (c == '\n') stderr_out ("\\n\n"); | |
| 261 else stderr_out ("\\%o ", c); | |
| 262 } | |
| 263 #endif /* testing Mule */ | |
| 428 | 264 return c; |
| 265 } | |
| 266 else if (MARKERP (readcharfun)) | |
| 267 { | |
| 867 | 268 Ichar c; |
| 665 | 269 Charbpos mpos = marker_position (readcharfun); |
| 428 | 270 struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
| 271 | |
| 272 if (mpos >= BUF_ZV (inbuffer)) | |
| 273 return -1; | |
| 274 c = BUF_FETCH_CHAR (inbuffer, mpos); | |
| 275 set_marker_position (readcharfun, mpos + 1); | |
| 276 return c; | |
| 277 } | |
| 278 else | |
| 279 { | |
| 280 Lisp_Object tem = call0 (readcharfun); | |
| 281 | |
| 282 if (!CHAR_OR_CHAR_INTP (tem)) | |
| 283 return -1; | |
| 284 return XCHAR_OR_CHAR_INT (tem); | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
| 289 If the stream is a user function, call it with the char as argument. */ | |
| 290 | |
| 291 static void | |
| 867 | 292 unreadchar (Lisp_Object readcharfun, Ichar c) |
| 428 | 293 { |
| 294 if (c == -1) | |
| 295 /* Don't back up the pointer if we're unreading the end-of-input mark, | |
| 296 since readchar didn't advance it when we read it. */ | |
| 297 ; | |
| 298 else if (BUFFERP (readcharfun)) | |
| 299 BUF_SET_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
| 300 else if (LSTREAMP (readcharfun)) | |
| 301 { | |
| 867 | 302 Lstream_unget_ichar (XLSTREAM (readcharfun), c); |
| 428 | 303 #ifdef DEBUG_XEMACS /* testing Mule */ |
| 304 { | |
| 305 static int testing_mule = 0; /* Set this using debugger */ | |
| 306 if (testing_mule) | |
| 307 fprintf (stderr, | |
| 308 (c >= 0x20 && c <= 0x7E) ? "UU%c" : | |
| 309 ((c == '\n') ? "UU\\n\n" : "UU\\%o"), c); | |
| 310 } | |
| 311 #endif | |
| 312 } | |
| 313 else if (MARKERP (readcharfun)) | |
| 314 set_marker_position (readcharfun, marker_position (readcharfun) - 1); | |
| 315 else | |
| 316 call1 (readcharfun, make_char (c)); | |
| 317 } | |
| 318 | |
| 319 static Lisp_Object read0 (Lisp_Object readcharfun); | |
| 320 static Lisp_Object read1 (Lisp_Object readcharfun); | |
| 321 static Lisp_Object read_list (Lisp_Object readcharfun, | |
| 867 | 322 Ichar terminator, |
| 428 | 323 int allow_dotted_lists, |
| 324 int check_for_doc_references); | |
| 325 | |
| 326 static void readevalloop (Lisp_Object readcharfun, | |
| 327 Lisp_Object sourcefile, | |
| 328 Lisp_Object (*evalfun) (Lisp_Object), | |
| 329 int printflag); | |
| 330 | |
| 331 static Lisp_Object | |
| 332 load_unwind (Lisp_Object stream) /* used as unwind-protect function in load */ | |
| 333 { | |
| 334 Lstream_close (XLSTREAM (stream)); | |
| 335 return Qnil; | |
| 336 } | |
| 337 | |
| 2548 | 338 /* Check if NONRELOC/RELOC (an absolute filename) is suppressed according |
| 339 to load-suppress-alist. */ | |
| 340 static int | |
| 341 check_if_suppressed (Ibyte *nonreloc, Lisp_Object reloc) | |
| 342 { | |
| 343 Bytecount len; | |
| 344 | |
| 345 if (!NILP (reloc)) | |
| 346 { | |
| 347 nonreloc = XSTRING_DATA (reloc); | |
| 348 len = XSTRING_LENGTH (reloc); | |
| 349 } | |
| 350 else | |
| 351 len = qxestrlen (nonreloc); | |
| 352 | |
| 353 if (len >= 4 && !qxestrcmp_ascii (nonreloc + len - 4, ".elc")) | |
| 354 len -= 4; | |
| 355 else if (len >= 3 && !qxestrcmp_ascii (nonreloc + len - 3, ".el")) | |
| 356 len -= 3; | |
| 357 | |
| 2567 | 358 { |
| 359 EXTERNAL_LIST_LOOP_2 (acons, Vload_suppress_alist) | |
| 360 { | |
| 361 if (CONSP (acons) && STRINGP (XCAR (acons))) | |
| 362 { | |
| 363 Lisp_Object name = XCAR (acons); | |
| 364 if (XSTRING_LENGTH (name) == len && | |
| 365 !memcmp (XSTRING_DATA (name), nonreloc, len)) | |
| 366 { | |
| 367 struct gcpro gcpro1; | |
| 368 Lisp_Object val; | |
| 369 | |
| 370 GCPRO1 (reloc); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4608
diff
changeset
|
371 val = IGNORE_MULTIPLE_VALUES (Feval (XCDR (acons))); |
| 2567 | 372 UNGCPRO; |
| 373 | |
| 374 if (!NILP (val)) | |
| 375 return 1; | |
| 376 } | |
| 377 } | |
| 378 } | |
| 379 } | |
| 2548 | 380 |
| 381 return 0; | |
| 382 } | |
| 383 | |
| 428 | 384 /* The plague is coming. |
| 385 | |
| 386 Ring around the rosy, pocket full of posy, | |
| 387 Ashes ashes, they all fall down. | |
| 388 */ | |
| 389 void | |
| 390 ebolify_bytecode_constants (Lisp_Object vector) | |
| 391 { | |
| 392 int len = XVECTOR_LENGTH (vector); | |
| 393 int i; | |
| 394 | |
| 395 for (i = 0; i < len; i++) | |
| 396 { | |
| 397 Lisp_Object el = XVECTOR_DATA (vector)[i]; | |
| 398 | |
| 399 /* We don't check for `eq', `equal', and the others that have | |
| 400 bytecode opcodes. This might lose if someone passes #'eq or | |
| 401 something to `funcall', but who would really do that? As | |
| 402 they say in law, we've made a "good-faith effort" to | |
| 403 unfuckify ourselves. And doing it this way avoids screwing | |
| 404 up args to `make-hash-table' and such. As it is, we have to | |
| 405 add an extra Ebola check in decode_weak_list_type(). --ben */ | |
| 406 if (EQ (el, Qassoc)) el = Qold_assoc; | |
| 407 else if (EQ (el, Qdelq)) el = Qold_delq; | |
| 408 #if 0 | |
| 409 /* I think this is a bad idea because it will probably mess | |
| 410 with keymap code. */ | |
| 411 else if (EQ (el, Qdelete)) el = Qold_delete; | |
| 412 #endif | |
| 413 else if (EQ (el, Qrassq)) el = Qold_rassq; | |
| 414 else if (EQ (el, Qrassoc)) el = Qold_rassoc; | |
| 415 | |
| 416 XVECTOR_DATA (vector)[i] = el; | |
| 417 } | |
| 418 } | |
| 419 | |
| 420 static Lisp_Object | |
| 558 | 421 pas_de_holgazan_ici (int fd, Lisp_Object victim) |
| 428 | 422 { |
| 423 Lisp_Object tem; | |
| 424 EMACS_INT pos; | |
| 425 | |
| 426 if (!INTP (XCDR (victim))) | |
| 563 | 427 invalid_byte_code ("Bogus doc string reference", victim); |
| 428 | 428 pos = XINT (XCDR (victim)); |
| 429 if (pos < 0) | |
| 430 pos = -pos; /* kludge to mark a user variable */ | |
| 814 | 431 tem = unparesseuxify_doc_string (fd, pos, 0, Vload_file_name_internal, 0); |
| 428 | 432 if (!STRINGP (tem)) |
| 563 | 433 signal_error_1 (Qinvalid_byte_code, tem); |
| 428 | 434 return tem; |
| 435 } | |
| 436 | |
| 437 static Lisp_Object | |
| 438 load_force_doc_string_unwind (Lisp_Object oldlist) | |
| 439 { | |
| 440 struct gcpro gcpro1; | |
| 441 Lisp_Object list = Vload_force_doc_string_list; | |
| 442 Lisp_Object tail; | |
| 443 int fd = XINT (XCAR (Vload_descriptor_list)); | |
| 444 | |
| 445 GCPRO1 (list); | |
| 446 /* restore the old value first just in case an error occurs. */ | |
| 447 Vload_force_doc_string_list = oldlist; | |
| 448 | |
| 449 LIST_LOOP (tail, list) | |
| 450 { | |
| 451 Lisp_Object john = Fcar (tail); | |
| 452 if (CONSP (john)) | |
| 453 { | |
| 454 assert (CONSP (XCAR (john))); | |
| 455 assert (!purify_flag); /* should have been handled in read_list() */ | |
| 558 | 456 XCAR (john) = pas_de_holgazan_ici (fd, XCAR (john)); |
| 428 | 457 } |
| 458 else | |
| 459 { | |
| 460 Lisp_Object doc; | |
| 461 | |
| 462 assert (COMPILED_FUNCTIONP (john)); | |
| 463 if (CONSP (XCOMPILED_FUNCTION (john)->instructions)) | |
| 464 { | |
| 465 struct gcpro ngcpro1; | |
| 558 | 466 Lisp_Object juan = (pas_de_holgazan_ici |
| 814 | 467 (fd, |
| 468 XCOMPILED_FUNCTION (john)->instructions)); | |
| 428 | 469 Lisp_Object ivan; |
| 470 | |
| 471 NGCPRO1 (juan); | |
| 472 ivan = Fread (juan); | |
| 473 if (!CONSP (ivan)) | |
| 563 | 474 invalid_byte_code ("invalid lazy-loaded byte code", ivan); |
| 428 | 475 XCOMPILED_FUNCTION (john)->instructions = XCAR (ivan); |
| 476 /* v18 or v19 bytecode file. Need to Ebolify. */ | |
| 477 if (XCOMPILED_FUNCTION (john)->flags.ebolified | |
| 478 && VECTORP (XCDR (ivan))) | |
| 479 ebolify_bytecode_constants (XCDR (ivan)); | |
| 480 XCOMPILED_FUNCTION (john)->constants = XCDR (ivan); | |
| 481 NUNGCPRO; | |
| 482 } | |
| 483 doc = compiled_function_documentation (XCOMPILED_FUNCTION (john)); | |
| 484 if (CONSP (doc)) | |
| 485 { | |
| 486 assert (!purify_flag); /* should have been handled in | |
| 487 read_compiled_function() */ | |
| 558 | 488 doc = pas_de_holgazan_ici (fd, doc); |
| 428 | 489 set_compiled_function_documentation (XCOMPILED_FUNCTION (john), |
| 490 doc); | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 if (!NILP (list)) | |
| 496 free_list (list); | |
| 497 | |
| 498 UNGCPRO; | |
| 499 return Qnil; | |
| 500 } | |
| 501 | |
| 502 /* Close all descriptors in use for Fload_internal. | |
| 503 This is used when starting a subprocess. */ | |
| 504 | |
| 505 void | |
| 506 close_load_descs (void) | |
| 507 { | |
| 508 Lisp_Object tail; | |
| 509 LIST_LOOP (tail, Vload_descriptor_list) | |
| 771 | 510 retry_close (XINT (XCAR (tail))); |
| 428 | 511 } |
| 512 | |
| 513 #ifdef I18N3 | |
| 514 Lisp_Object Vfile_domain; | |
| 515 #endif /* I18N3 */ | |
| 516 | |
| 517 DEFUN ("load-internal", Fload_internal, 1, 6, 0, /* | |
| 518 Execute a file of Lisp code named FILE; no coding-system frobbing. | |
| 519 This function is identical to `load' except for the handling of the | |
| 520 CODESYS and USED-CODESYS arguments under XEmacs/Mule. (When Mule | |
| 521 support is not present, both functions are identical and ignore the | |
| 522 CODESYS and USED-CODESYS arguments.) | |
| 523 | |
| 524 If support for Mule exists in this Emacs, the file is decoded | |
| 525 according to CODESYS; if omitted, no conversion happens. If | |
| 526 USED-CODESYS is non-nil, it should be a symbol, and the actual coding | |
| 527 system that was used for the decoding is stored into it. It will in | |
| 528 general be different from CODESYS if CODESYS specifies automatic | |
| 529 encoding detection or end-of-line detection. | |
| 530 */ | |
| 444 | 531 (file, noerror, nomessage, nosuffix, codesys, used_codesys)) |
| 428 | 532 { |
| 533 /* This function can GC */ | |
| 534 int fd = -1; | |
| 535 int speccount = specpdl_depth (); | |
| 536 int source_only = 0; | |
| 1123 | 537 /* NEWER and OLDER are filenames w/o directory, used in loading messages |
| 538 to e.g. warn of newer .el files when the .elc is being loaded. */ | |
| 428 | 539 Lisp_Object newer = Qnil; |
| 1123 | 540 Lisp_Object older = Qnil; |
| 428 | 541 Lisp_Object handler = Qnil; |
| 542 Lisp_Object found = Qnil; | |
| 1292 | 543 Lisp_Object retval; |
| 1123 | 544 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 428 | 545 int reading_elc = 0; |
| 780 | 546 int from_require = EQ (nomessage, Qrequire); |
| 1261 | 547 int message_p = NILP (nomessage) || load_always_display_messages; |
| 428 | 548 struct stat s1, s2; |
| 1261 | 549 Ibyte *spaces = alloca_ibytes (load_in_progress * 2 + 10); |
| 550 int i; | |
| 1292 | 551 PROFILE_DECLARE (); |
| 428 | 552 |
| 1266 | 553 GCPRO4 (file, newer, older, found); |
| 428 | 554 CHECK_STRING (file); |
| 555 | |
| 1292 | 556 PROFILE_RECORD_ENTERING_SECTION (Qload_internal); |
| 557 | |
| 428 | 558 /* If file name is magic, call the handler. */ |
| 559 handler = Ffind_file_name_handler (file, Qload); | |
| 560 if (!NILP (handler)) | |
| 1292 | 561 { |
| 562 retval = call5 (handler, Qload, file, noerror, nomessage, nosuffix); | |
| 563 goto done; | |
| 564 } | |
| 428 | 565 |
| 566 /* Do this after the handler to avoid | |
| 567 the need to gcpro noerror, nomessage and nosuffix. | |
| 568 (Below here, we care only whether they are nil or not.) */ | |
| 569 file = Fsubstitute_in_file_name (file); | |
| 570 if (!NILP (used_codesys)) | |
| 571 CHECK_SYMBOL (used_codesys); | |
| 572 | |
| 1261 | 573 if (noninteractive) |
| 574 { | |
| 575 for (i = 0; i < load_in_progress * 2; i++) | |
| 576 spaces[i] = ' '; | |
| 577 spaces[i] = '\0'; | |
| 578 } | |
| 579 else | |
| 580 spaces[0] = '\0'; | |
| 581 | |
| 428 | 582 /* Avoid weird lossage with null string as arg, |
| 583 since it would try to load a directory as a Lisp file. | |
| 584 Unix truly sucks. */ | |
| 585 if (XSTRING_LENGTH (file) > 0) | |
| 586 { | |
| 867 | 587 Ibyte *foundstr; |
| 428 | 588 int foundlen; |
| 589 | |
| 590 fd = locate_file (Vload_path, file, | |
| 591 ((!NILP (nosuffix)) ? Qnil : | |
| 592 build_string (load_ignore_elc_files ? ".el:" : | |
| 593 ".elc:.el:")), | |
| 594 &found, | |
| 595 -1); | |
| 596 | |
| 597 if (fd < 0) | |
| 598 { | |
| 444 | 599 if (NILP (noerror)) |
| 563 | 600 signal_error (Qfile_error, "Cannot open load file", file); |
| 428 | 601 else |
| 602 { | |
| 1292 | 603 retval = Qnil; |
| 604 goto done; | |
| 428 | 605 } |
| 606 } | |
| 607 | |
| 2367 | 608 foundstr = alloca_ibytes (XSTRING_LENGTH (found) + 1); |
| 771 | 609 qxestrcpy (foundstr, XSTRING_DATA (found)); |
| 610 foundlen = qxestrlen (foundstr); | |
| 428 | 611 |
| 612 /* The omniscient JWZ thinks this is worthless, but I beg to | |
| 613 differ. --ben */ | |
| 614 if (load_ignore_elc_files) | |
| 1123 | 615 newer = Ffile_name_nondirectory (found); |
| 616 else if ((load_warn_when_source_newer || | |
| 617 load_ignore_out_of_date_elc_files) && | |
| 428 | 618 !memcmp (".elc", foundstr + foundlen - 4, 4)) |
| 619 { | |
| 771 | 620 if (! qxe_fstat (fd, &s1)) /* can't fail, right? */ |
| 428 | 621 { |
| 622 int result; | |
| 623 /* temporarily hack the 'c' off the end of the filename */ | |
| 624 foundstr[foundlen - 1] = '\0'; | |
| 771 | 625 result = qxe_stat (foundstr, &s2); |
| 428 | 626 if (result >= 0 && |
| 627 (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) | |
| 1123 | 628 { |
| 629 /* .elc exists and is out-of-date wrt .el */ | |
| 630 Lisp_Object el_name = make_string (foundstr, foundlen - 1); | |
| 631 struct gcpro nngcpro1; | |
| 632 NNGCPRO1 (el_name); | |
| 633 newer = Ffile_name_nondirectory (el_name); | |
| 634 if (load_ignore_out_of_date_elc_files) | |
| 635 { | |
| 636 int newfd = | |
| 637 locate_file_open_or_access_file | |
| 638 (XSTRING_DATA (el_name), -1); | |
| 639 | |
| 640 if (newfd >= 0) | |
| 641 { | |
| 642 older = Ffile_name_nondirectory (found); | |
| 643 found = el_name; | |
| 644 retry_close (fd); | |
| 645 fd = newfd; | |
| 646 } | |
| 647 } | |
| 648 NNUNGCPRO; | |
| 649 } | |
| 428 | 650 /* put the 'c' back on (kludge-o-rama) */ |
| 651 foundstr[foundlen - 1] = 'c'; | |
| 652 } | |
| 653 } | |
| 654 else if (load_warn_when_source_only && | |
| 655 /* `found' ends in ".el" */ | |
| 656 !memcmp (".el", foundstr + foundlen - 3, 3) && | |
| 657 /* `file' does not end in ".el" */ | |
| 658 memcmp (".el", | |
| 659 XSTRING_DATA (file) + XSTRING_LENGTH (file) - 3, | |
| 660 3)) | |
| 1123 | 661 source_only = 1; |
| 428 | 662 |
| 663 if (!memcmp (".elc", foundstr + foundlen - 4, 4)) | |
| 664 reading_elc = 1; | |
| 665 } | |
| 666 | |
| 1123 | 667 #define PRINT_LOADING_MESSAGE_1(loading, done) \ |
| 668 do { \ | |
| 669 if (load_ignore_elc_files) \ | |
| 670 { \ | |
| 671 if (message_p) \ | |
| 1261 | 672 message (loading done, spaces, \ |
| 1123 | 673 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 674 found : newer)); \ | |
| 675 } \ | |
| 676 else if (!NILP (older)) \ | |
| 677 { \ | |
| 678 assert (load_ignore_out_of_date_elc_files); \ | |
| 1261 | 679 message (loading done " (file %s is out-of-date)", spaces, \ |
| 1123 | 680 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 681 found : newer), \ | |
| 682 XSTRING_DATA (older)); \ | |
| 683 } \ | |
| 684 else if (!NILP (newer)) \ | |
| 1261 | 685 message (loading done " (file %s is newer)", spaces, \ |
| 1123 | 686 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 687 found : file), \ | |
| 688 XSTRING_DATA (newer)); \ | |
| 689 else if (source_only) \ | |
| 1261 | 690 message (loading done " (file %s.elc does not exist)", spaces, \ |
| 1123 | 691 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 692 found : file), \ | |
| 693 XSTRING_DATA (Ffile_name_nondirectory (file))); \ | |
| 694 else if (message_p) \ | |
| 1261 | 695 message (loading done, spaces, \ |
| 1123 | 696 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 697 found : file)); \ | |
| 428 | 698 } while (0) |
| 699 | |
| 1261 | 700 #define PRINT_LOADING_MESSAGE(done) \ |
| 701 do { \ | |
| 702 if (from_require) \ | |
| 703 PRINT_LOADING_MESSAGE_1 ("%sRequiring %s...", done); \ | |
| 704 else \ | |
| 705 PRINT_LOADING_MESSAGE_1 ("%sLoading %s...", done); \ | |
| 780 | 706 } while (0) |
| 707 | |
| 428 | 708 PRINT_LOADING_MESSAGE (""); |
| 709 | |
|
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710 LISP_READONLY (found) = 1; |
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711 |
| 428 | 712 { |
| 713 /* Lisp_Object's must be malloc'ed, not stack-allocated */ | |
| 714 Lisp_Object lispstream = Qnil; | |
| 442 | 715 const int block_size = 8192; |
| 428 | 716 struct gcpro ngcpro1; |
| 717 | |
| 718 NGCPRO1 (lispstream); | |
| 719 lispstream = make_filedesc_input_stream (fd, 0, -1, LSTR_CLOSING); | |
| 720 /* 64K is used for normal files; 8K should be OK here because Lisp | |
| 721 files aren't really all that big. */ | |
| 722 Lstream_set_buffering (XLSTREAM (lispstream), LSTREAM_BLOCKN_BUFFERED, | |
| 723 block_size); | |
| 771 | 724 lispstream = make_coding_input_stream |
| 725 (XLSTREAM (lispstream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 726 CODING_DECODE, 0); |
| 428 | 727 Lstream_set_buffering (XLSTREAM (lispstream), LSTREAM_BLOCKN_BUFFERED, |
| 728 block_size); | |
| 729 /* NOTE: Order of these is very important. Don't rearrange them. */ | |
| 853 | 730 internal_bind_int (&load_in_progress, 1 + load_in_progress); |
| 428 | 731 record_unwind_protect (load_unwind, lispstream); |
| 853 | 732 internal_bind_lisp_object (&Vload_descriptor_list, |
| 733 Fcons (make_int (fd), Vload_descriptor_list)); | |
| 734 internal_bind_lisp_object (&Vload_file_name_internal, found); | |
| 735 /* this is not a simple internal_bind. */ | |
| 428 | 736 record_unwind_protect (load_force_doc_string_unwind, |
| 737 Vload_force_doc_string_list); | |
| 853 | 738 Vload_force_doc_string_list = Qnil; |
|
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739 /* load-file-name is not read-only to Lisp. */ |
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740 internal_bind_lisp_object (&Vload_file_name, Fcopy_sequence(found)); |
| 428 | 741 #ifdef I18N3 |
| 853 | 742 /* set it to nil; a call to #'domain will set it. */ |
| 743 internal_bind_lisp_object (&Vfile_domain, Qnil); | |
| 428 | 744 #endif |
| 745 | |
|
4448
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746 /* Is there a #!? If so, read it, and unread ;!. |
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747 |
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748 GNU implement this by treating any #! anywhere in the source text as |
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749 commenting out the whole line. */ |
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750 { |
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751 char shebangp[2]; |
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752 int num_read; |
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753 |
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754 num_read = Lstream_read (XLSTREAM (lispstream), shebangp, |
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755 sizeof(shebangp)); |
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756 if (sizeof(shebangp) == num_read |
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757 && 0 == strncmp("#!", shebangp, sizeof(shebangp))) |
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758 { |
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759 shebangp[0] = ';'; |
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760 } |
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761 |
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762 Lstream_unread (XLSTREAM (lispstream), shebangp, num_read); |
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763 } |
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764 |
| 428 | 765 /* Now determine what sort of ELC file we're reading in. */ |
| 853 | 766 internal_bind_int (&load_byte_code_version, load_byte_code_version); |
| 428 | 767 if (reading_elc) |
| 768 { | |
| 769 char elc_header[8]; | |
| 770 int num_read; | |
| 771 | |
| 772 num_read = Lstream_read (XLSTREAM (lispstream), elc_header, 8); | |
| 773 if (num_read < 8 | |
| 774 || strncmp (elc_header, ";ELC", 4)) | |
| 775 { | |
| 776 /* Huh? Probably not a valid ELC file. */ | |
| 777 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 778 Lstream_unread (XLSTREAM (lispstream), elc_header, num_read); | |
| 779 } | |
| 780 else | |
| 781 load_byte_code_version = elc_header[4]; | |
| 782 } | |
| 783 else | |
| 784 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 785 | |
| 786 readevalloop (lispstream, file, Feval, 0); | |
| 787 if (!NILP (used_codesys)) | |
| 788 Fset (used_codesys, | |
| 789 XCODING_SYSTEM_NAME | |
| 771 | 790 (coding_stream_detected_coding_system (XLSTREAM (lispstream)))); |
| 791 unbind_to (speccount); | |
| 428 | 792 |
| 793 NUNGCPRO; | |
| 794 } | |
| 795 | |
| 796 { | |
| 797 Lisp_Object tem; | |
| 798 /* #### Disgusting kludge */ | |
| 799 /* Run any load-hooks for this file. */ | |
| 800 /* #### An even more disgusting kludge. There is horrible code */ | |
| 801 /* that is relying on the fact that dumped lisp files are found */ | |
| 802 /* via `load-path' search. */ | |
| 803 Lisp_Object name = file; | |
| 804 | |
| 1123 | 805 if (!NILP (Ffile_name_absolute_p (file))) |
| 806 name = Ffile_name_nondirectory (file); | |
| 428 | 807 |
| 1261 | 808 tem = Fassoc (name, Vafter_load_alist); |
| 428 | 809 if (!NILP (tem)) |
| 810 { | |
| 811 struct gcpro ngcpro1; | |
| 812 | |
| 813 NGCPRO1 (tem); | |
| 814 /* Use eval so that errors give a semi-meaningful backtrace. --Stig */ | |
| 815 tem = Fcons (Qprogn, Fcdr (tem)); | |
| 816 Feval (tem); | |
| 817 NUNGCPRO; | |
| 818 } | |
| 819 } | |
| 820 | |
| 821 if (!noninteractive) | |
| 822 PRINT_LOADING_MESSAGE ("done"); | |
| 823 | |
| 1292 | 824 retval = Qt; |
| 825 done: | |
| 826 PROFILE_RECORD_EXITING_SECTION (Qload_internal); | |
| 428 | 827 UNGCPRO; |
| 1292 | 828 return retval; |
| 428 | 829 } |
| 830 | |
| 831 | |
| 832 /* ------------------------------- */ | |
| 833 /* locate_file */ | |
| 834 /* ------------------------------- */ | |
| 835 | |
| 836 static int | |
| 837 decode_mode_1 (Lisp_Object mode) | |
| 838 { | |
| 839 if (EQ (mode, Qexists)) | |
| 840 return F_OK; | |
| 841 else if (EQ (mode, Qexecutable)) | |
| 842 return X_OK; | |
| 843 else if (EQ (mode, Qwritable)) | |
| 844 return W_OK; | |
| 845 else if (EQ (mode, Qreadable)) | |
| 846 return R_OK; | |
| 847 else if (INTP (mode)) | |
| 848 { | |
| 849 check_int_range (XINT (mode), 0, 7); | |
| 850 return XINT (mode); | |
| 851 } | |
| 852 else | |
| 563 | 853 invalid_argument ("Invalid value", mode); |
| 428 | 854 return 0; /* unreached */ |
| 855 } | |
| 856 | |
| 857 static int | |
| 858 decode_mode (Lisp_Object mode) | |
| 859 { | |
| 860 if (NILP (mode)) | |
| 861 return R_OK; | |
| 862 else if (CONSP (mode)) | |
| 863 { | |
| 864 int mask = 0; | |
| 2367 | 865 EXTERNAL_LIST_LOOP_2 (elt, mode) |
| 866 mask |= decode_mode_1 (elt); | |
| 428 | 867 return mask; |
| 868 } | |
| 869 else | |
| 870 return decode_mode_1 (mode); | |
| 871 } | |
| 872 | |
| 873 DEFUN ("locate-file", Flocate_file, 2, 4, 0, /* | |
| 874 Search for FILENAME through PATH-LIST. | |
| 875 | |
| 876 If SUFFIXES is non-nil, it should be a list of suffixes to append to | |
| 877 file name when searching. | |
| 878 | |
| 879 If MODE is non-nil, it should be a symbol or a list of symbol representing | |
| 880 requirements. Allowed symbols are `exists', `executable', `writable', and | |
| 881 `readable'. If MODE is nil, it defaults to `readable'. | |
| 882 | |
| 2548 | 883 Filenames are checked against `load-suppress-alist' to determine if they |
| 884 should be ignored. | |
| 885 | |
| 428 | 886 `locate-file' keeps hash tables of the directories it searches through, |
| 887 in order to speed things up. It tries valiantly to not get confused in | |
| 888 the face of a changing and unpredictable environment, but can occasionally | |
| 889 get tripped up. In this case, you will have to call | |
| 890 `locate-file-clear-hashing' to get it back on track. See that function | |
| 891 for details. | |
| 892 */ | |
| 893 (filename, path_list, suffixes, mode)) | |
| 894 { | |
| 895 /* This function can GC */ | |
| 896 Lisp_Object tp; | |
| 897 | |
| 898 CHECK_STRING (filename); | |
| 899 | |
| 900 if (LISTP (suffixes)) | |
| 901 { | |
| 2367 | 902 EXTERNAL_LIST_LOOP_2 (elt, suffixes) |
| 903 CHECK_STRING (elt); | |
| 428 | 904 } |
| 905 else | |
| 906 CHECK_STRING (suffixes); | |
| 907 | |
| 908 locate_file (path_list, filename, suffixes, &tp, decode_mode (mode)); | |
| 909 return tp; | |
| 910 } | |
| 911 | |
| 912 /* Recalculate the hash table for the given string. DIRECTORY should | |
| 913 better have been through Fexpand_file_name() by now. */ | |
| 914 | |
| 915 static Lisp_Object | |
| 916 locate_file_refresh_hashing (Lisp_Object directory) | |
| 917 { | |
| 918 Lisp_Object hash = | |
| 771 | 919 make_directory_hash_table (XSTRING_DATA (directory)); |
| 428 | 920 |
| 921 if (!NILP (hash)) | |
| 922 Fputhash (directory, hash, Vlocate_file_hash_table); | |
| 923 return hash; | |
| 924 } | |
| 925 | |
| 926 /* find the hash table for the given directory, recalculating if necessary */ | |
| 927 | |
| 928 static Lisp_Object | |
| 929 locate_file_find_directory_hash_table (Lisp_Object directory) | |
| 930 { | |
| 931 Lisp_Object hash = Fgethash (directory, Vlocate_file_hash_table, Qnil); | |
| 932 if (NILP (hash)) | |
| 933 return locate_file_refresh_hashing (directory); | |
| 934 else | |
| 935 return hash; | |
| 936 } | |
| 937 | |
| 938 /* The SUFFIXES argument in any of the locate_file* functions can be | |
| 939 nil, a list, or a string (for backward compatibility), with the | |
| 940 following semantics: | |
| 941 | |
| 942 a) nil - no suffix, just search for file name intact | |
| 943 (semantically different from "empty suffix list", which | |
| 944 would be meaningless.) | |
| 945 b) list - list of suffixes to append to file name. Each of these | |
| 946 must be a string. | |
| 947 c) string - colon-separated suffixes to append to file name (backward | |
| 948 compatibility). | |
| 949 | |
| 950 All of this got hairy, so I decided to use a mapper. Calling a | |
| 951 function for each suffix shouldn't slow things down, since | |
| 952 locate_file is rarely called with enough suffixes for funcalls to | |
| 953 make any difference. */ | |
| 954 | |
| 955 /* Map FUN over SUFFIXES, as described above. FUN will be called with a | |
| 956 char * containing the current file name, and ARG. Mapping stops when | |
| 957 FUN returns non-zero. */ | |
| 958 static void | |
| 959 locate_file_map_suffixes (Lisp_Object filename, Lisp_Object suffixes, | |
| 867 | 960 int (*fun) (Ibyte *, void *), |
| 428 | 961 void *arg) |
| 962 { | |
| 963 /* This function can GC */ | |
| 867 | 964 Ibyte *fn; |
| 428 | 965 int fn_len, max; |
| 966 | |
| 967 /* Calculate maximum size of any filename made from | |
| 968 this path element/specified file name and any possible suffix. */ | |
| 969 if (CONSP (suffixes)) | |
| 970 { | |
| 971 /* We must traverse the list, so why not do it right. */ | |
| 972 Lisp_Object tail; | |
| 973 max = 0; | |
| 974 LIST_LOOP (tail, suffixes) | |
| 975 { | |
| 976 if (XSTRING_LENGTH (XCAR (tail)) > max) | |
| 977 max = XSTRING_LENGTH (XCAR (tail)); | |
| 978 } | |
| 979 } | |
| 980 else if (NILP (suffixes)) | |
| 981 max = 0; | |
| 982 else | |
| 983 /* Just take the easy way out */ | |
| 984 max = XSTRING_LENGTH (suffixes); | |
| 985 | |
| 986 fn_len = XSTRING_LENGTH (filename); | |
| 2367 | 987 fn = alloca_ibytes (max + fn_len + 1); |
| 771 | 988 memcpy (fn, XSTRING_DATA (filename), fn_len); |
| 428 | 989 |
| 990 /* Loop over suffixes. */ | |
| 991 if (!STRINGP (suffixes)) | |
| 992 { | |
| 993 if (NILP (suffixes)) | |
| 994 { | |
| 995 /* Case a) discussed in the comment above. */ | |
| 996 fn[fn_len] = 0; | |
| 997 if ((*fun) (fn, arg)) | |
| 998 return; | |
| 999 } | |
| 1000 else | |
| 1001 { | |
| 1002 /* Case b) */ | |
| 1003 Lisp_Object tail; | |
| 1004 LIST_LOOP (tail, suffixes) | |
| 1005 { | |
| 1006 memcpy (fn + fn_len, XSTRING_DATA (XCAR (tail)), | |
| 1007 XSTRING_LENGTH (XCAR (tail))); | |
| 1008 fn[fn_len + XSTRING_LENGTH (XCAR (tail))] = 0; | |
| 1009 if ((*fun) (fn, arg)) | |
| 1010 return; | |
| 1011 } | |
| 1012 } | |
| 1013 } | |
| 1014 else | |
| 1015 { | |
| 1016 /* Case c) */ | |
| 867 | 1017 const Ibyte *nsuffix = XSTRING_DATA (suffixes); |
| 428 | 1018 |
| 1019 while (1) | |
| 1020 { | |
| 867 | 1021 Ibyte *esuffix = qxestrchr (nsuffix, ':'); |
| 771 | 1022 Bytecount lsuffix = esuffix ? esuffix - nsuffix : |
| 1023 qxestrlen (nsuffix); | |
| 428 | 1024 |
| 1025 /* Concatenate path element/specified name with the suffix. */ | |
| 771 | 1026 qxestrncpy (fn + fn_len, nsuffix, lsuffix); |
| 428 | 1027 fn[fn_len + lsuffix] = 0; |
| 1028 | |
| 1029 if ((*fun) (fn, arg)) | |
| 1030 return; | |
| 1031 | |
| 1032 /* Advance to next suffix. */ | |
| 1033 if (esuffix == 0) | |
| 1034 break; | |
| 1035 nsuffix += lsuffix + 1; | |
| 1036 } | |
| 1037 } | |
| 1038 } | |
| 1039 | |
| 771 | 1040 struct locate_file_in_directory_mapper_closure |
| 1041 { | |
| 428 | 1042 int fd; |
| 1043 Lisp_Object *storeptr; | |
| 1044 int mode; | |
| 1045 }; | |
| 1046 | |
| 1123 | 1047 /* open() or access() a file to be returned by locate_file(). if |
| 1048 ACCESS_MODE >= 0, do an access() with that mode, else open(). Does | |
| 1049 various magic, e.g. opening the file read-only and binary and setting | |
| 1050 the close-on-exec flag on the file. */ | |
| 1051 | |
| 1052 static int | |
| 1053 locate_file_open_or_access_file (Ibyte *fn, int access_mode) | |
| 1054 { | |
| 1055 int val; | |
| 1056 | |
| 1057 /* Check that we can access or open it. */ | |
| 1058 if (access_mode >= 0) | |
| 1059 val = qxe_access (fn, access_mode); | |
| 1060 else | |
| 1061 { | |
| 1062 val = qxe_open (fn, O_RDONLY | OPEN_BINARY, 0); | |
| 1063 | |
| 1064 #ifndef WIN32_NATIVE | |
| 1065 if (val >= 0) | |
| 1066 /* If we actually opened the file, set close-on-exec flag | |
| 1067 on the new descriptor so that subprocesses can't whack | |
| 1068 at it. */ | |
| 1069 (void) fcntl (val, F_SETFD, FD_CLOEXEC); | |
| 1070 #endif | |
| 1071 } | |
| 1072 | |
| 1073 return val; | |
| 1074 } | |
| 1075 | |
| 428 | 1076 static int |
| 867 | 1077 locate_file_in_directory_mapper (Ibyte *fn, void *arg) |
| 428 | 1078 { |
| 1079 struct locate_file_in_directory_mapper_closure *closure = | |
| 771 | 1080 (struct locate_file_in_directory_mapper_closure *) arg; |
| 428 | 1081 struct stat st; |
| 1082 | |
| 1083 /* Ignore file if it's a directory. */ | |
| 771 | 1084 if (qxe_stat (fn, &st) >= 0 |
| 428 | 1085 && (st.st_mode & S_IFMT) != S_IFDIR) |
| 1086 { | |
| 1087 /* Check that we can access or open it. */ | |
| 1123 | 1088 closure->fd = locate_file_open_or_access_file (fn, closure->mode); |
| 428 | 1089 |
| 1090 if (closure->fd >= 0) | |
| 1091 { | |
| 2548 | 1092 if (!check_if_suppressed (fn, Qnil)) |
| 1093 { | |
| 1094 /* We succeeded; return this descriptor and filename. */ | |
| 1095 if (closure->storeptr) | |
| 1096 *closure->storeptr = build_intstring (fn); | |
| 1097 | |
| 1098 return 1; | |
| 1099 } | |
| 428 | 1100 } |
| 1101 } | |
| 1102 /* Keep mapping. */ | |
| 1103 return 0; | |
| 1104 } | |
| 1105 | |
| 1106 | |
| 1107 /* look for STR in PATH, optionally adding SUFFIXES. DIRECTORY need | |
| 1108 not have been expanded. */ | |
| 1109 | |
| 1110 static int | |
| 1111 locate_file_in_directory (Lisp_Object directory, Lisp_Object str, | |
| 1112 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1113 int mode) | |
| 1114 { | |
| 1115 /* This function can GC */ | |
| 1116 struct locate_file_in_directory_mapper_closure closure; | |
| 1117 Lisp_Object filename = Qnil; | |
| 1118 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 1119 | |
| 1120 GCPRO3 (directory, str, filename); | |
| 1121 | |
| 1122 filename = Fexpand_file_name (str, directory); | |
| 1123 if (NILP (filename) || NILP (Ffile_name_absolute_p (filename))) | |
| 1124 /* If there are non-absolute elts in PATH (eg ".") */ | |
| 1125 /* Of course, this could conceivably lose if luser sets | |
| 1126 default-directory to be something non-absolute ... */ | |
| 1127 { | |
| 1128 if (NILP (filename)) | |
| 1129 /* NIL means current directory */ | |
| 1130 filename = current_buffer->directory; | |
| 1131 else | |
| 1132 filename = Fexpand_file_name (filename, | |
| 1133 current_buffer->directory); | |
| 1134 if (NILP (Ffile_name_absolute_p (filename))) | |
| 1135 { | |
| 1136 /* Give up on this directory! */ | |
| 1137 UNGCPRO; | |
| 1138 return -1; | |
| 1139 } | |
| 1140 } | |
| 1141 | |
| 1142 closure.fd = -1; | |
| 1143 closure.storeptr = storeptr; | |
| 1144 closure.mode = mode; | |
| 1145 | |
| 771 | 1146 locate_file_map_suffixes (filename, suffixes, |
| 1147 locate_file_in_directory_mapper, | |
| 428 | 1148 &closure); |
| 1149 | |
| 1150 UNGCPRO; | |
| 1151 return closure.fd; | |
| 1152 } | |
| 1153 | |
| 1154 /* do the same as locate_file() but don't use any hash tables. */ | |
| 1155 | |
| 1156 static int | |
| 1157 locate_file_without_hash (Lisp_Object path, Lisp_Object str, | |
| 1158 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1159 int mode) | |
| 1160 { | |
| 1161 /* This function can GC */ | |
| 1162 int absolute = !NILP (Ffile_name_absolute_p (str)); | |
| 1163 | |
| 2367 | 1164 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1165 { |
| 2367 | 1166 int val = locate_file_in_directory (elt, str, suffixes, storeptr, |
| 428 | 1167 mode); |
| 1168 if (val >= 0) | |
| 1169 return val; | |
| 1170 if (absolute) | |
| 1171 break; | |
| 1172 } | |
| 1173 return -1; | |
| 1174 } | |
| 1175 | |
| 1176 static int | |
| 867 | 1177 locate_file_construct_suffixed_files_mapper (Ibyte *fn, void *arg) |
| 428 | 1178 { |
| 771 | 1179 Lisp_Object *tail = (Lisp_Object *) arg; |
| 1180 *tail = Fcons (build_intstring (fn), *tail); | |
| 428 | 1181 return 0; |
| 1182 } | |
| 1183 | |
| 1184 /* Construct a list of all files to search for. | |
| 1185 It makes sense to have this despite locate_file_map_suffixes() | |
| 1186 because we need Lisp strings to access the hash-table, and it would | |
| 1187 be inefficient to create them on the fly, again and again for each | |
| 1188 path component. See locate_file(). */ | |
| 1189 | |
| 1190 static Lisp_Object | |
| 1191 locate_file_construct_suffixed_files (Lisp_Object filename, | |
| 1192 Lisp_Object suffixes) | |
| 1193 { | |
| 1194 Lisp_Object tail = Qnil; | |
| 1195 struct gcpro gcpro1; | |
| 1196 GCPRO1 (tail); | |
| 1197 | |
| 1198 locate_file_map_suffixes (filename, suffixes, | |
| 1199 locate_file_construct_suffixed_files_mapper, | |
| 1200 &tail); | |
| 1201 | |
| 1202 UNGCPRO; | |
| 1203 return Fnreverse (tail); | |
| 1204 } | |
| 1205 | |
| 1206 DEFUN ("locate-file-clear-hashing", Flocate_file_clear_hashing, 1, 1, 0, /* | |
| 1207 Clear the hash records for the specified list of directories. | |
| 1208 `locate-file' uses a hashing scheme to speed lookup, and will correctly | |
| 1209 track the following environmental changes: | |
| 1210 | |
| 1211 -- changes of any sort to the list of directories to be searched. | |
| 1212 -- addition and deletion of non-shadowing files (see below) from the | |
| 1213 directories in the list. | |
| 1214 -- byte-compilation of a .el file into a .elc file. | |
| 1215 | |
| 1216 `locate-file' will primarily get confused if you add a file that shadows | |
| 1217 \(i.e. has the same name as) another file further down in the directory list. | |
| 1218 In this case, you must call `locate-file-clear-hashing'. | |
| 1219 | |
| 1220 If PATH is t, it means to fully clear all the accumulated hashes. This | |
| 1221 can be used if the internal tables grow too large, or when dumping. | |
| 1222 */ | |
| 1223 (path)) | |
| 1224 { | |
| 1225 if (EQ (path, Qt)) | |
| 1226 Fclrhash (Vlocate_file_hash_table); | |
| 1227 else | |
| 1228 { | |
| 2367 | 1229 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1230 { |
| 2367 | 1231 Lisp_Object pathel = Fexpand_file_name (elt, Qnil); |
| 428 | 1232 Fremhash (pathel, Vlocate_file_hash_table); |
| 1233 } | |
| 1234 } | |
| 1235 return Qnil; | |
| 1236 } | |
| 1237 | |
| 1238 /* Search for a file whose name is STR, looking in directories | |
| 1239 in the Lisp list PATH, and trying suffixes from SUFFIXES. | |
| 1240 SUFFIXES is a list of possible suffixes, or (for backward | |
| 1241 compatibility) a string containing possible suffixes separated by | |
| 1242 colons. | |
| 1243 On success, returns a file descriptor. On failure, returns -1. | |
| 1244 | |
| 1245 MODE nonnegative means don't open the files, | |
| 1246 just look for one for which access(file,MODE) succeeds. In this case, | |
| 951 | 1247 returns a nonnegative value on success. On failure, returns -1. |
| 428 | 1248 |
| 2548 | 1249 If STOREPTR is non-nil, it points to a slot where the name of |
| 428 | 1250 the file actually found should be stored as a Lisp string. |
| 1251 Nil is stored there on failure. | |
| 1252 | |
| 1253 Called openp() in FSFmacs. */ | |
| 1254 | |
| 1255 int | |
| 1256 locate_file (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, | |
| 1257 Lisp_Object *storeptr, int mode) | |
| 1258 { | |
| 1259 /* This function can GC */ | |
| 1260 Lisp_Object suffixtab = Qnil; | |
| 2367 | 1261 Lisp_Object pathel_expanded; |
| 428 | 1262 int val; |
| 1263 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1264 | |
| 1265 if (storeptr) | |
| 1266 *storeptr = Qnil; | |
| 1267 | |
| 1268 /* Is it really necessary to gcpro path and str? It shouldn't be | |
| 1269 unless some caller has fucked up. There are known instances that | |
| 1270 call us with build_string("foo:bar") as SUFFIXES, though. */ | |
| 1271 GCPRO4 (path, str, suffixes, suffixtab); | |
| 1272 | |
| 1273 /* if this filename has directory components, it's too complicated | |
| 1274 to try and use the hash tables. */ | |
| 1275 if (!NILP (Ffile_name_directory (str))) | |
| 1276 { | |
| 1277 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1278 UNGCPRO; | |
| 1279 return val; | |
| 1280 } | |
| 1281 | |
| 1282 suffixtab = locate_file_construct_suffixed_files (str, suffixes); | |
| 1283 | |
| 2367 | 1284 { |
| 1285 EXTERNAL_LIST_LOOP_2 (pathel, path) | |
| 1286 { | |
| 1287 Lisp_Object hash_table; | |
| 1288 int found = 0; | |
| 1289 | |
| 1290 /* If this path element is relative, we have to look by hand. */ | |
| 1291 if (NILP (pathel) || NILP (Ffile_name_absolute_p (pathel))) | |
| 1292 { | |
| 1293 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1294 mode); | |
| 1295 if (val >= 0) | |
| 428 | 1296 { |
| 2367 | 1297 UNGCPRO; |
| 1298 return val; | |
| 428 | 1299 } |
| 2367 | 1300 continue; |
| 1301 } | |
| 1302 | |
| 1303 pathel_expanded = Fexpand_file_name (pathel, Qnil); | |
| 1304 hash_table = locate_file_find_directory_hash_table (pathel_expanded); | |
| 1305 | |
| 1306 if (!NILP (hash_table)) | |
| 1307 { | |
| 1308 /* Loop over suffixes. */ | |
| 1309 LIST_LOOP_2 (elt, suffixtab) | |
| 1310 if (!NILP (Fgethash (elt, hash_table, Qnil))) | |
| 1311 { | |
| 1312 found = 1; | |
| 1313 break; | |
| 1314 } | |
| 1315 } | |
| 1316 | |
| 1317 if (found) | |
| 1318 { | |
| 1319 /* This is a likely candidate. Look by hand in this directory | |
| 1320 so we don't get thrown off if someone byte-compiles a file. */ | |
| 1321 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1322 mode); | |
| 1323 if (val >= 0) | |
| 1324 { | |
| 1325 UNGCPRO; | |
| 1326 return val; | |
| 1327 } | |
| 1328 | |
| 1329 /* Hmm ... the file isn't actually there. (Or possibly it's | |
| 1330 a directory ...) So refresh our hashing. */ | |
| 1331 locate_file_refresh_hashing (pathel_expanded); | |
| 1332 } | |
| 1333 } | |
| 428 | 1334 } |
| 1335 | |
| 1336 /* File is probably not there, but check the hard way just in case. */ | |
| 1337 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1338 if (val >= 0) | |
| 1339 { | |
| 1340 /* Sneaky user added a file without telling us. */ | |
| 1341 Flocate_file_clear_hashing (path); | |
| 1342 } | |
| 1343 | |
| 1344 UNGCPRO; | |
| 1345 return val; | |
| 1346 } | |
| 1347 | |
| 1348 | |
| 1349 #ifdef LOADHIST | |
| 1350 | |
| 1351 /* Merge the list we've accumulated of globals from the current input source | |
| 1352 into the load_history variable. The details depend on whether | |
| 1353 the source has an associated file name or not. */ | |
| 1354 | |
| 1355 static void | |
| 1356 build_load_history (int loading, Lisp_Object source) | |
| 1357 { | |
| 1358 REGISTER Lisp_Object tail, prev, newelt; | |
| 1359 REGISTER Lisp_Object tem, tem2; | |
| 1360 int foundit; | |
| 1361 | |
| 1362 #if !defined(LOADHIST_DUMPED) | |
| 1363 /* Don't bother recording anything for preloaded files. */ | |
| 1364 if (purify_flag) | |
| 1365 return; | |
| 1366 #endif | |
| 1367 | |
| 1368 tail = Vload_history; | |
| 1369 prev = Qnil; | |
| 1370 foundit = 0; | |
| 1371 while (!NILP (tail)) | |
| 1372 { | |
| 1373 tem = Fcar (tail); | |
| 1374 | |
| 1375 /* Find the feature's previous assoc list... */ | |
| 1376 if (internal_equal (source, Fcar (tem), 0)) | |
| 1377 { | |
| 1378 foundit = 1; | |
| 1379 | |
| 1380 /* If we're loading, remove it. */ | |
| 1381 if (loading) | |
| 1382 { | |
| 1383 if (NILP (prev)) | |
| 1384 Vload_history = Fcdr (tail); | |
| 1385 else | |
| 1386 Fsetcdr (prev, Fcdr (tail)); | |
| 1387 } | |
| 1388 | |
| 1389 /* Otherwise, cons on new symbols that are not already members. */ | |
| 1390 else | |
| 1391 { | |
| 1392 tem2 = Vcurrent_load_list; | |
| 1393 | |
| 1394 while (CONSP (tem2)) | |
| 1395 { | |
| 1396 newelt = XCAR (tem2); | |
| 1397 | |
| 1398 if (NILP (Fmemq (newelt, tem))) | |
| 1399 Fsetcar (tail, Fcons (Fcar (tem), | |
| 1400 Fcons (newelt, Fcdr (tem)))); | |
| 1401 | |
| 1402 tem2 = XCDR (tem2); | |
| 1403 QUIT; | |
| 1404 } | |
| 1405 } | |
| 1406 } | |
| 1407 else | |
| 1408 prev = tail; | |
| 1409 tail = Fcdr (tail); | |
| 1410 QUIT; | |
| 1411 } | |
| 1412 | |
| 1413 /* If we're loading, cons the new assoc onto the front of load-history, | |
| 1414 the most-recently-loaded position. Also do this if we didn't find | |
| 1415 an existing member for the current source. */ | |
| 1416 if (loading || !foundit) | |
| 1417 Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
| 1418 Vload_history); | |
| 1419 } | |
| 1420 | |
| 1421 #else /* !LOADHIST */ | |
| 1422 #define build_load_history(x,y) | |
| 1423 #endif /* !LOADHIST */ | |
| 1424 | |
| 1425 | |
| 1426 static void | |
| 1427 readevalloop (Lisp_Object readcharfun, | |
| 1428 Lisp_Object sourcename, | |
| 1429 Lisp_Object (*evalfun) (Lisp_Object), | |
| 1430 int printflag) | |
| 1431 { | |
| 1432 /* This function can GC */ | |
| 867 | 1433 REGISTER Ichar c; |
| 1849 | 1434 Lisp_Object val = Qnil; |
| 428 | 1435 int speccount = specpdl_depth (); |
| 1436 struct gcpro gcpro1, gcpro2; | |
| 1437 struct buffer *b = 0; | |
| 1438 | |
| 1439 if (BUFFERP (readcharfun)) | |
| 1440 b = XBUFFER (readcharfun); | |
| 1441 else if (MARKERP (readcharfun)) | |
| 1442 b = XMARKER (readcharfun)->buffer; | |
| 1443 | |
| 1444 /* Don't do this. It is not necessary, and it needlessly exposes | |
| 1445 READCHARFUN (which can be a stream) to Lisp. --hniksic */ | |
| 1446 /*specbind (Qstandard_input, readcharfun);*/ | |
| 1447 | |
| 2548 | 1448 internal_bind_lisp_object (&Vcurrent_load_list, Qnil); |
| 428 | 1449 |
| 1450 GCPRO2 (val, sourcename); | |
| 1451 | |
| 1452 LOADHIST_ATTACH (sourcename); | |
| 1453 | |
| 1454 while (1) | |
| 1455 { | |
| 1456 QUIT; | |
| 1457 | |
| 1458 if (b != 0 && !BUFFER_LIVE_P (b)) | |
| 563 | 1459 invalid_operation ("Reading from killed buffer", Qunbound); |
| 428 | 1460 |
| 1461 c = readchar (readcharfun); | |
| 1462 if (c == ';') | |
| 1463 { | |
| 1464 /* Skip comment */ | |
| 1465 while ((c = readchar (readcharfun)) != '\n' && c != -1) | |
| 1466 QUIT; | |
| 1467 continue; | |
| 1468 } | |
| 1469 if (c < 0) | |
| 1470 break; | |
| 1471 | |
| 1472 /* Ignore whitespace here, so we can detect eof. */ | |
| 1473 if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
| 1474 continue; | |
| 1475 | |
| 814 | 1476 unreadchar (readcharfun, c); |
| 1477 Vread_objects = Qnil; | |
| 1478 if (NILP (Vload_read_function)) | |
| 1479 val = read0 (readcharfun); | |
| 428 | 1480 else |
| 814 | 1481 val = call1 (Vload_read_function, readcharfun); |
| 428 | 1482 val = (*evalfun) (val); |
| 1483 if (printflag) | |
| 1484 { | |
| 1485 Vvalues = Fcons (val, Vvalues); | |
| 1486 if (EQ (Vstandard_output, Qt)) | |
| 1487 Fprin1 (val, Qnil); | |
| 1488 else | |
| 1489 Fprint (val, Qnil); | |
| 1490 } | |
| 1491 } | |
| 1492 | |
| 1493 build_load_history (LSTREAMP (readcharfun) || | |
| 1494 /* This looks weird, but it's what's in FSFmacs */ | |
| 1495 (b ? BUF_NARROWED (b) : BUF_NARROWED (current_buffer)), | |
| 1496 sourcename); | |
| 1497 UNGCPRO; | |
| 1498 | |
| 771 | 1499 unbind_to (speccount); |
| 428 | 1500 } |
| 1501 | |
| 1502 DEFUN ("eval-buffer", Feval_buffer, 0, 2, "bBuffer: ", /* | |
| 1503 Execute BUFFER as Lisp code. | |
| 1504 Programs can pass two arguments, BUFFER and PRINTFLAG. | |
| 1505 BUFFER is the buffer to evaluate (nil means use current buffer). | |
| 1506 PRINTFLAG controls printing of output: | |
| 444 | 1507 nil means discard it; anything else is a stream for printing. |
| 428 | 1508 |
| 1509 If there is no error, point does not move. If there is an error, | |
| 1510 point remains at the end of the last character read from the buffer. | |
| 1511 */ | |
| 444 | 1512 (buffer, printflag)) |
| 428 | 1513 { |
| 1514 /* This function can GC */ | |
| 1515 int speccount = specpdl_depth (); | |
| 1516 Lisp_Object tem, buf; | |
| 1517 | |
| 444 | 1518 if (NILP (buffer)) |
| 428 | 1519 buf = Fcurrent_buffer (); |
| 1520 else | |
| 444 | 1521 buf = Fget_buffer (buffer); |
| 428 | 1522 if (NILP (buf)) |
| 563 | 1523 invalid_argument ("No such buffer", Qunbound); |
| 428 | 1524 |
| 1525 if (NILP (printflag)) | |
| 1526 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ | |
| 1527 else | |
| 1528 tem = printflag; | |
| 1529 specbind (Qstandard_output, tem); | |
| 1530 record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
| 1531 BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
| 1532 readevalloop (buf, XBUFFER (buf)->filename, Feval, | |
| 1533 !NILP (printflag)); | |
| 1534 | |
| 771 | 1535 return unbind_to (speccount); |
| 428 | 1536 } |
| 1537 | |
| 1538 #if 0 | |
| 826 | 1539 DEFUN ("eval-current-buffer", Feval_current_buffer, 0, 1, "", /* |
| 428 | 1540 Execute the current buffer as Lisp code. |
| 1541 Programs can pass argument PRINTFLAG which controls printing of output: | |
| 1542 nil means discard it; anything else is stream for print. | |
| 1543 | |
| 1544 If there is no error, point does not move. If there is an error, | |
| 1545 point remains at the end of the last character read from the buffer. | |
| 1546 */ | |
| 1547 (printflag)) | |
| 1548 { | |
| 1549 code omitted; | |
| 1550 } | |
| 1551 #endif /* 0 */ | |
| 1552 | |
| 1553 DEFUN ("eval-region", Feval_region, 2, 3, "r", /* | |
| 1554 Execute the region as Lisp code. | |
| 444 | 1555 When called from programs, expects two arguments START and END |
| 428 | 1556 giving starting and ending indices in the current buffer |
| 1557 of the text to be executed. | |
| 444 | 1558 Programs can pass third optional argument STREAM which controls output: |
| 428 | 1559 nil means discard it; anything else is stream for printing it. |
| 1560 | |
| 1561 If there is no error, point does not move. If there is an error, | |
| 1562 point remains at the end of the last character read from the buffer. | |
| 1563 | |
| 1564 Note: Before evaling the region, this function narrows the buffer to it. | |
| 1565 If the code being eval'd should happen to trigger a redisplay you may | |
| 1566 see some text temporarily disappear because of this. | |
| 1567 */ | |
| 444 | 1568 (start, end, stream)) |
| 428 | 1569 { |
| 1570 /* This function can GC */ | |
| 1571 int speccount = specpdl_depth (); | |
| 1572 Lisp_Object tem; | |
| 1573 Lisp_Object cbuf = Fcurrent_buffer (); | |
| 1574 | |
| 444 | 1575 if (NILP (stream)) |
| 428 | 1576 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ |
| 1577 else | |
| 444 | 1578 tem = stream; |
| 428 | 1579 specbind (Qstandard_output, tem); |
| 1580 | |
| 444 | 1581 if (NILP (stream)) |
| 428 | 1582 record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 844 | 1583 record_unwind_protect (save_restriction_restore, |
| 1584 save_restriction_save (current_buffer)); | |
| 428 | 1585 |
| 444 | 1586 /* This both uses start and checks its type. */ |
| 1587 Fgoto_char (start, cbuf); | |
| 1588 Fnarrow_to_region (make_int (BUF_BEGV (current_buffer)), end, cbuf); | |
| 428 | 1589 readevalloop (cbuf, XBUFFER (cbuf)->filename, Feval, |
| 444 | 1590 !NILP (stream)); |
| 428 | 1591 |
| 771 | 1592 return unbind_to (speccount); |
| 428 | 1593 } |
| 1594 | |
| 1595 DEFUN ("read", Fread, 0, 1, 0, /* | |
| 1596 Read one Lisp expression as text from STREAM, return as Lisp object. | |
| 1597 If STREAM is nil, use the value of `standard-input' (which see). | |
| 1598 STREAM or the value of `standard-input' may be: | |
| 1599 a buffer (read from point and advance it) | |
| 1600 a marker (read from where it points and advance it) | |
| 1601 a function (call it with no arguments for each character, | |
| 1602 call it with a char as argument to push a char back) | |
| 1603 a string (takes text from string, starting at the beginning) | |
| 1604 t (read text line using minibuffer and use it). | |
| 1605 */ | |
| 1606 (stream)) | |
| 1607 { | |
| 1608 if (NILP (stream)) | |
| 1609 stream = Vstandard_input; | |
| 1610 if (EQ (stream, Qt)) | |
| 1611 stream = Qread_char; | |
| 1612 | |
| 1613 Vread_objects = Qnil; | |
| 1614 | |
| 1615 if (EQ (stream, Qread_char)) | |
| 1616 { | |
| 1617 Lisp_Object val = call1 (Qread_from_minibuffer, | |
| 771 | 1618 build_msg_string ("Lisp expression: ")); |
| 428 | 1619 return Fcar (Fread_from_string (val, Qnil, Qnil)); |
| 1620 } | |
| 1621 | |
| 1622 if (STRINGP (stream)) | |
| 1623 return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
| 1624 | |
| 1625 return read0 (stream); | |
| 1626 } | |
| 1627 | |
| 1628 DEFUN ("read-from-string", Fread_from_string, 1, 3, 0, /* | |
| 1629 Read one Lisp expression which is represented as text by STRING. | |
| 1630 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
| 1631 START and END optionally delimit a substring of STRING from which to read; | |
| 1632 they default to 0 and (length STRING) respectively. | |
| 1633 */ | |
| 1634 (string, start, end)) | |
| 1635 { | |
| 1636 Bytecount startval, endval; | |
| 1637 Lisp_Object tem; | |
| 1638 Lisp_Object lispstream = Qnil; | |
| 1639 struct gcpro gcpro1; | |
| 1640 | |
| 1641 GCPRO1 (lispstream); | |
| 1642 CHECK_STRING (string); | |
| 1643 get_string_range_byte (string, start, end, &startval, &endval, | |
| 1644 GB_HISTORICAL_STRING_BEHAVIOR); | |
| 1645 lispstream = make_lisp_string_input_stream (string, startval, | |
| 1646 endval - startval); | |
| 1647 | |
| 1648 Vread_objects = Qnil; | |
| 1649 | |
| 1650 tem = read0 (lispstream); | |
| 1651 /* Yeah, it's ugly. Gonna make something of it? | |
| 1652 At least our reader is reentrant ... */ | |
| 1653 tem = | |
| 1654 (Fcons (tem, make_int | |
| 793 | 1655 (string_index_byte_to_char |
| 771 | 1656 (string, |
| 428 | 1657 startval + Lstream_byte_count (XLSTREAM (lispstream)))))); |
| 1658 Lstream_delete (XLSTREAM (lispstream)); | |
| 1659 UNGCPRO; | |
| 1660 return tem; | |
| 1661 } | |
| 1662 | |
| 1663 | |
| 1664 | |
| 1665 /* Use this for recursive reads, in contexts where internal tokens | |
| 1666 are not allowed. See also read1(). */ | |
| 1667 static Lisp_Object | |
| 1668 read0 (Lisp_Object readcharfun) | |
| 1669 { | |
| 1670 Lisp_Object val = read1 (readcharfun); | |
| 1671 | |
| 1672 if (CONSP (val) && UNBOUNDP (XCAR (val))) | |
| 1673 { | |
| 867 | 1674 Ichar c = XCHAR (XCDR (val)); |
| 853 | 1675 free_cons (val); |
| 428 | 1676 return Fsignal (Qinvalid_read_syntax, |
| 1677 list1 (Fchar_to_string (make_char (c)))); | |
| 1678 } | |
| 1679 | |
| 1680 return val; | |
| 1681 } | |
| 3543 | 1682 |
| 1683 /* A Unicode escape, as in C# (though we only permit them in strings | |
| 1684 and characters, not arbitrarily in the source code.) */ | |
| 1685 static Ichar | |
| 1686 read_unicode_escape (Lisp_Object readcharfun, int unicode_hex_count) | |
| 1687 { | |
| 1688 REGISTER Ichar i = 0, c; | |
| 1689 REGISTER int count = 0; | |
| 1690 Lisp_Object lisp_char; | |
| 1691 while (++count <= unicode_hex_count) | |
| 1692 { | |
| 1693 c = readchar (readcharfun); | |
| 1694 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ | |
| 1695 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); | |
| 1696 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1697 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1698 else | |
| 1699 { | |
| 1700 syntax_error ("Non-hex digit used for Unicode escape", | |
| 1701 make_char (c)); | |
| 1702 break; | |
| 1703 } | |
| 1704 } | |
| 1705 | |
| 4268 | 1706 if (i >= 0x110000 || i < 0) |
| 4096 | 1707 { |
| 1708 syntax_error ("Not a Unicode code point", make_int(i)); | |
| 1709 } | |
| 1710 | |
| 3543 | 1711 lisp_char = Funicode_to_char(make_int(i), Qnil); |
| 1712 | |
| 1713 if (EQ(Qnil, lisp_char)) | |
| 1714 { | |
| 4096 | 1715 /* Will happen on non-Mule. Silent corruption is what happens |
| 1716 elsewhere, and we used to do that to be consistent, but GNU error, | |
| 1717 so people writing portable code need to be able to handle that, and | |
| 1718 given a choice I prefer that behaviour. | |
| 1719 | |
| 1720 An undesirable aspect to this error is that the code point is shown | |
| 1721 as a decimal integer, which is mostly unreadable. */ | |
| 1722 syntax_error ("Unsupported Unicode code point", make_int(i)); | |
| 3543 | 1723 } |
| 4096 | 1724 |
| 1725 return XCHAR(lisp_char); | |
| 3543 | 1726 } |
| 1727 | |
| 428 | 1728 |
| 867 | 1729 static Ichar |
| 428 | 1730 read_escape (Lisp_Object readcharfun) |
| 1731 { | |
| 1732 /* This function can GC */ | |
| 867 | 1733 Ichar c = readchar (readcharfun); |
| 428 | 1734 |
| 1735 if (c < 0) | |
| 563 | 1736 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1737 |
| 1738 switch (c) | |
| 1739 { | |
| 1740 case 'a': return '\007'; | |
| 1741 case 'b': return '\b'; | |
| 1742 case 'd': return 0177; | |
| 1743 case 'e': return 033; | |
| 1744 case 'f': return '\f'; | |
| 1745 case 'n': return '\n'; | |
| 1746 case 'r': return '\r'; | |
| 1747 case 't': return '\t'; | |
| 1748 case 'v': return '\v'; | |
| 1749 case '\n': return -1; | |
| 1750 | |
| 1751 case 'M': | |
| 1752 c = readchar (readcharfun); | |
| 1753 if (c < 0) | |
| 563 | 1754 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1755 if (c != '-') |
| 563 | 1756 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1757 c = readchar (readcharfun); |
| 1758 if (c < 0) | |
| 563 | 1759 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1760 if (c == '\\') |
| 1761 c = read_escape (readcharfun); | |
| 1762 return c | 0200; | |
| 1763 | |
| 1764 /* Originally, FSF_KEYS provided a degree of FSF Emacs | |
| 1765 compatibility by defining character "modifiers" alt, super, | |
| 1766 hyper and shift to infest the characters (i.e. integers). | |
| 1767 | |
| 1768 However, this doesn't cut it for XEmacs 20, which | |
| 1769 distinguishes characters from integers. Without Mule, ?\H-a | |
| 1770 simply returns ?a because every character is clipped into | |
| 1771 0-255. Under Mule it is much worse -- ?\H-a with FSF_KEYS | |
| 1772 produces an illegal character, and moves us to crash-land. | |
| 1773 | |
| 1774 For these reasons, FSF_KEYS hack is useless and without hope | |
| 1775 of ever working under XEmacs 20. */ | |
| 1776 #ifdef FSF_KEYS | |
| 831 | 1777 /* Deleted */ |
| 1778 #endif | |
| 428 | 1779 |
| 1780 case 'C': | |
| 1781 c = readchar (readcharfun); | |
| 1782 if (c < 0) | |
| 563 | 1783 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1784 if (c != '-') |
| 563 | 1785 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1786 case '^': |
| 1787 c = readchar (readcharfun); | |
| 1788 if (c < 0) | |
| 563 | 1789 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1790 if (c == '\\') |
| 1791 c = read_escape (readcharfun); | |
| 1792 /* FSFmacs junk for non-ASCII controls. | |
| 1793 Not used here. */ | |
| 1794 if (c == '?') | |
| 1795 return 0177; | |
| 1796 else | |
| 1797 return c & (0200 | 037); | |
| 1798 | |
| 1799 case '0': | |
| 1800 case '1': | |
| 1801 case '2': | |
| 1802 case '3': | |
| 1803 case '4': | |
| 1804 case '5': | |
| 1805 case '6': | |
| 1806 case '7': | |
| 1807 /* An octal escape, as in ANSI C. */ | |
| 1808 { | |
| 867 | 1809 REGISTER Ichar i = c - '0'; |
| 428 | 1810 REGISTER int count = 0; |
| 1811 while (++count < 3) | |
| 1812 { | |
| 1813 if ((c = readchar (readcharfun)) >= '0' && c <= '7') | |
| 1814 i = (i << 3) + (c - '0'); | |
| 1815 else | |
| 1816 { | |
| 1817 unreadchar (readcharfun, c); | |
| 1818 break; | |
| 1819 } | |
| 1820 } | |
| 831 | 1821 if (i >= 0400) |
| 3367 | 1822 syntax_error ("Non-ISO-8859-1 character specified with octal escape", |
| 831 | 1823 make_int (i)); |
| 428 | 1824 return i; |
| 1825 } | |
| 1826 | |
| 1827 case 'x': | |
| 1828 /* A hex escape, as in ANSI C, except that we only allow latin-1 | |
| 1829 characters to be read this way. What is "\x4e03" supposed to | |
| 1830 mean, anyways, if the internal representation is hidden? | |
| 1831 This is also consistent with the treatment of octal escapes. */ | |
| 1832 { | |
| 867 | 1833 REGISTER Ichar i = 0; |
| 428 | 1834 REGISTER int count = 0; |
| 1835 while (++count <= 2) | |
| 1836 { | |
| 1837 c = readchar (readcharfun); | |
| 867 | 1838 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ |
| 428 | 1839 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
| 1840 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1841 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1842 else | |
| 1843 { | |
| 1844 unreadchar (readcharfun, c); | |
| 1845 break; | |
| 1846 } | |
| 1847 } | |
|
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1848 |
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1849 if (count == 3) |
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1850 { |
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1851 c = readchar (readcharfun); |
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1852 if ((c >= '0' && c <= '9') || |
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1853 (c >= 'a' && c <= 'f') || |
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1854 (c >= 'A' && c <= 'F')) |
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1855 { |
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1856 Lisp_Object args[2]; |
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1857 |
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1858 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
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1859 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; |
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1860 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; |
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1861 |
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1862 args[0] = build_string ("?\\x%x"); |
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1863 args[1] = make_int (i); |
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1864 syntax_error ("Overlong hex character escape", |
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1865 Fformat (2, args)); |
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1866 } |
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1867 unreadchar (readcharfun, c); |
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1868 } |
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1869 |
| 428 | 1870 return i; |
| 1871 } | |
| 3367 | 1872 case 'U': |
| 1873 /* Post-Unicode-2.0: Up to eight hex chars */ | |
| 3543 | 1874 return read_unicode_escape(readcharfun, 8); |
| 3367 | 1875 case 'u': |
| 3543 | 1876 /* Unicode-2.0 and before; four hex chars. */ |
| 1877 return read_unicode_escape(readcharfun, 4); | |
| 428 | 1878 |
| 1879 default: | |
| 1880 return c; | |
| 1881 } | |
| 1882 } | |
| 1883 | |
| 1884 | |
| 1885 | |
| 1886 /* read symbol-constituent stuff into `Vread_buffer_stream'. */ | |
| 1887 static Bytecount | |
| 867 | 1888 read_atom_0 (Lisp_Object readcharfun, Ichar firstchar, int *saw_a_backslash) |
| 428 | 1889 { |
| 1890 /* This function can GC */ | |
| 867 | 1891 Ichar c = ((firstchar) >= 0 ? firstchar : readchar (readcharfun)); |
| 428 | 1892 Lstream_rewind (XLSTREAM (Vread_buffer_stream)); |
| 1893 | |
| 1894 *saw_a_backslash = 0; | |
| 1895 | |
| 1896 while (c > 040 /* #### - comma should be here as should backquote */ | |
| 1897 && !(c == '\"' || c == '\'' || c == ';' | |
| 1898 || c == '(' || c == ')' | |
| 1899 || c == '[' || c == ']' || c == '#' | |
| 1900 )) | |
| 1901 { | |
| 1902 if (c == '\\') | |
| 1903 { | |
| 1904 c = readchar (readcharfun); | |
| 1905 if (c < 0) | |
| 563 | 1906 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1907 *saw_a_backslash = 1; |
| 1908 } | |
| 867 | 1909 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), c); |
| 428 | 1910 QUIT; |
| 1911 c = readchar (readcharfun); | |
| 1912 } | |
| 1913 | |
| 1914 if (c >= 0) | |
| 1915 unreadchar (readcharfun, c); | |
| 1916 /* blasted terminating 0 */ | |
| 867 | 1917 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), 0); |
| 428 | 1918 Lstream_flush (XLSTREAM (Vread_buffer_stream)); |
| 1919 | |
| 1920 return Lstream_byte_count (XLSTREAM (Vread_buffer_stream)) - 1; | |
| 1921 } | |
| 1922 | |
| 867 | 1923 static Lisp_Object parse_integer (const Ibyte *buf, Bytecount len, int base); |
| 428 | 1924 |
| 1925 static Lisp_Object | |
| 1926 read_atom (Lisp_Object readcharfun, | |
| 867 | 1927 Ichar firstchar, |
| 428 | 1928 int uninterned_symbol) |
| 1929 { | |
| 1930 /* This function can GC */ | |
| 1931 int saw_a_backslash; | |
| 1932 Bytecount len = read_atom_0 (readcharfun, firstchar, &saw_a_backslash); | |
| 1933 char *read_ptr = (char *) | |
| 1934 resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)); | |
| 1935 | |
| 1936 /* Is it an integer? */ | |
| 1937 if (! (saw_a_backslash || uninterned_symbol)) | |
| 1938 { | |
| 1939 /* If a token had any backslashes in it, it is disqualified from | |
| 1940 being an integer or a float. This means that 123\456 is a | |
| 1941 symbol, as is \123 (which is the way (intern "123") prints). | |
| 1942 Also, if token was preceded by #:, it's always a symbol. | |
| 1943 */ | |
| 1944 char *p = read_ptr + len; | |
| 1945 char *p1 = read_ptr; | |
| 1946 | |
| 1947 if (*p1 == '+' || *p1 == '-') p1++; | |
| 1948 if (p1 != p) | |
| 1949 { | |
| 1950 int c; | |
| 1951 | |
| 1952 while (p1 != p && (c = *p1) >= '0' && c <= '9') | |
| 1953 p1++; | |
| 1954 /* Integers can have trailing decimal points. */ | |
| 1955 if (p1 > read_ptr && p1 < p && *p1 == '.') | |
| 1956 p1++; | |
| 1957 if (p1 == p) | |
| 1958 { | |
| 1959 /* It is an integer. */ | |
| 1960 if (p1[-1] == '.') | |
| 1961 p1[-1] = '\0'; | |
| 1962 #if 0 | |
| 1963 { | |
| 1964 int number = 0; | |
| 1965 if (sizeof (int) == sizeof (EMACS_INT)) | |
| 1966 number = atoi (read_buffer); | |
| 1967 else if (sizeof (long) == sizeof (EMACS_INT)) | |
| 1968 number = atol (read_buffer); | |
| 1969 else | |
| 2500 | 1970 ABORT (); |
| 428 | 1971 return make_int (number); |
| 1972 } | |
| 1973 #else | |
| 867 | 1974 return parse_integer ((Ibyte *) read_ptr, len, 10); |
| 428 | 1975 #endif |
| 1976 } | |
| 1977 } | |
| 1983 | 1978 #ifdef HAVE_RATIO |
| 1979 if (isratio_string (read_ptr)) | |
| 1980 { | |
| 2013 | 1981 /* GMP ratio_set_string has no effect with initial + sign */ |
| 2010 | 1982 if (*read_ptr == '+') |
| 1983 read_ptr++; | |
| 1983 | 1984 ratio_set_string (scratch_ratio, read_ptr, 0); |
| 1985 ratio_canonicalize (scratch_ratio); | |
| 1986 return Fcanonicalize_number (make_ratio_rt (scratch_ratio)); | |
| 1987 } | |
| 1988 #endif | |
| 428 | 1989 if (isfloat_string (read_ptr)) |
| 1990 return make_float (atof (read_ptr)); | |
| 1991 } | |
| 1992 | |
| 1993 { | |
| 1994 Lisp_Object sym; | |
| 1995 if (uninterned_symbol) | |
| 867 | 1996 sym = Fmake_symbol ( make_string ((Ibyte *) read_ptr, len)); |
| 428 | 1997 else |
| 1998 { | |
| 867 | 1999 Lisp_Object name = make_string ((Ibyte *) read_ptr, len); |
| 428 | 2000 sym = Fintern (name, Qnil); |
| 2001 } | |
| 2002 return sym; | |
| 2003 } | |
| 2004 } | |
| 2005 | |
| 2006 | |
| 2007 static Lisp_Object | |
| 867 | 2008 parse_integer (const Ibyte *buf, Bytecount len, int base) |
| 428 | 2009 { |
| 867 | 2010 const Ibyte *lim = buf + len; |
| 2011 const Ibyte *p = buf; | |
| 428 | 2012 EMACS_UINT num = 0; |
| 2013 int negativland = 0; | |
| 2014 | |
| 2015 if (*p == '-') | |
| 2016 { | |
| 2017 negativland = 1; | |
| 2018 p++; | |
| 2019 } | |
| 2020 else if (*p == '+') | |
| 2021 { | |
| 2022 p++; | |
| 2023 } | |
| 2024 | |
| 2025 if (p == lim) | |
| 2026 goto loser; | |
| 2027 | |
| 2028 for (; (p < lim) && (*p != '\0'); p++) | |
| 2029 { | |
| 2030 int c = *p; | |
| 2031 EMACS_UINT onum; | |
| 2032 | |
| 2033 if (isdigit (c)) | |
| 2034 c = c - '0'; | |
| 2035 else if (isupper (c)) | |
| 2036 c = c - 'A' + 10; | |
| 2037 else if (islower (c)) | |
| 2038 c = c - 'a' + 10; | |
| 2039 else | |
| 2040 goto loser; | |
| 2041 | |
| 2042 if (c < 0 || c >= base) | |
| 2043 goto loser; | |
| 2044 | |
| 2045 onum = num; | |
| 2046 num = num * base + c; | |
| 2047 if (num < onum) | |
| 2048 goto overflow; | |
| 2049 } | |
| 2050 | |
| 2051 { | |
| 2052 EMACS_INT int_result = negativland ? - (EMACS_INT) num : (EMACS_INT) num; | |
| 2053 Lisp_Object result = make_int (int_result); | |
| 2054 if (num && ((XINT (result) < 0) != negativland)) | |
| 2055 goto overflow; | |
| 2056 if (XINT (result) != int_result) | |
| 2057 goto overflow; | |
| 2058 return result; | |
| 2059 } | |
| 2060 overflow: | |
| 1983 | 2061 #ifdef HAVE_BIGNUM |
| 2062 { | |
|
4329
d9eb5ea14f65
Provide %b in #'format; use it for converting between ints and bit vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4268
diff
changeset
|
2063 bignum_set_string (scratch_bignum, (const char *) buf, base); |
| 1983 | 2064 return make_bignum_bg (scratch_bignum); |
| 2065 } | |
| 2066 #else | |
| 428 | 2067 return Fsignal (Qinvalid_read_syntax, |
| 771 | 2068 list3 (build_msg_string |
| 428 | 2069 ("Integer constant overflow in reader"), |
| 2070 make_string (buf, len), | |
| 2071 make_int (base))); | |
| 1983 | 2072 #endif /* HAVE_BIGNUM */ |
| 428 | 2073 loser: |
| 2074 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2075 list3 (build_msg_string |
| 428 | 2076 ("Invalid integer constant in reader"), |
| 2077 make_string (buf, len), | |
| 2078 make_int (base))); | |
| 2079 } | |
| 2080 | |
| 2081 | |
| 2082 static Lisp_Object | |
| 2083 read_integer (Lisp_Object readcharfun, int base) | |
| 2084 { | |
| 2085 /* This function can GC */ | |
| 2086 int saw_a_backslash; | |
| 2087 Bytecount len = read_atom_0 (readcharfun, -1, &saw_a_backslash); | |
| 2088 return (parse_integer | |
| 2089 (resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)), | |
| 2090 ((saw_a_backslash) | |
| 2091 ? 0 /* make parse_integer signal error */ | |
| 2092 : len), | |
| 2093 base)); | |
| 2094 } | |
| 2095 | |
| 2096 static Lisp_Object | |
| 2097 read_bit_vector (Lisp_Object readcharfun) | |
| 2098 { | |
| 2099 unsigned_char_dynarr *dyn = Dynarr_new (unsigned_char); | |
| 440 | 2100 Lisp_Object val; |
| 428 | 2101 |
| 2102 while (1) | |
| 2103 { | |
| 444 | 2104 unsigned char bit; |
| 867 | 2105 Ichar c = readchar (readcharfun); |
| 444 | 2106 if (c == '0') |
| 2107 bit = 0; | |
| 2108 else if (c == '1') | |
| 2109 bit = 1; | |
| 2110 else | |
| 2111 { | |
| 2112 if (c >= 0) | |
| 2113 unreadchar (readcharfun, c); | |
| 2114 break; | |
| 2115 } | |
| 2116 Dynarr_add (dyn, bit); | |
| 428 | 2117 } |
| 2118 | |
| 440 | 2119 val = make_bit_vector_from_byte_vector (Dynarr_atp (dyn, 0), |
| 2120 Dynarr_length (dyn)); | |
| 2121 Dynarr_free (dyn); | |
| 2122 | |
| 2123 return val; | |
| 428 | 2124 } |
| 2125 | |
| 2126 | |
| 2127 | |
| 2128 /* structures */ | |
| 2129 | |
| 2130 struct structure_type * | |
| 2131 define_structure_type (Lisp_Object type, | |
| 2132 int (*validate) (Lisp_Object data, | |
| 578 | 2133 Error_Behavior errb), |
| 428 | 2134 Lisp_Object (*instantiate) (Lisp_Object data)) |
| 2135 { | |
| 2136 struct structure_type st; | |
| 2137 | |
| 2138 st.type = type; | |
| 2139 st.keywords = Dynarr_new (structure_keyword_entry); | |
| 2140 st.validate = validate; | |
| 2141 st.instantiate = instantiate; | |
| 2142 Dynarr_add (the_structure_type_dynarr, st); | |
| 2143 | |
|
4844
91b3d00e717f
Various cleanups for Dynarr code, from Unicode-internal ws
Ben Wing <ben@xemacs.org>
parents:
4677
diff
changeset
|
2144 return Dynarr_lastp (the_structure_type_dynarr); |
| 428 | 2145 } |
| 2146 | |
| 2147 void | |
| 2148 define_structure_type_keyword (struct structure_type *st, Lisp_Object keyword, | |
| 2149 int (*validate) (Lisp_Object keyword, | |
| 2150 Lisp_Object value, | |
| 578 | 2151 Error_Behavior errb)) |
| 428 | 2152 { |
| 2153 struct structure_keyword_entry en; | |
| 2154 | |
| 2155 en.keyword = keyword; | |
| 2156 en.validate = validate; | |
| 2157 Dynarr_add (st->keywords, en); | |
| 2158 } | |
| 2159 | |
| 2160 static struct structure_type * | |
| 2161 recognized_structure_type (Lisp_Object type) | |
| 2162 { | |
| 2163 int i; | |
| 2164 | |
| 2165 for (i = 0; i < Dynarr_length (the_structure_type_dynarr); i++) | |
| 2166 { | |
| 2167 struct structure_type *st = Dynarr_atp (the_structure_type_dynarr, i); | |
| 2168 if (EQ (st->type, type)) | |
| 2169 return st; | |
| 2170 } | |
| 2171 | |
| 2172 return 0; | |
| 2173 } | |
| 2174 | |
| 2175 static Lisp_Object | |
| 2176 read_structure (Lisp_Object readcharfun) | |
| 2177 { | |
| 867 | 2178 Ichar c = readchar (readcharfun); |
| 428 | 2179 Lisp_Object list = Qnil; |
| 2180 Lisp_Object orig_list = Qnil; | |
| 2181 Lisp_Object already_seen = Qnil; | |
| 2182 int keyword_count; | |
| 2183 struct structure_type *st; | |
| 2184 struct gcpro gcpro1, gcpro2; | |
| 2185 | |
| 2186 GCPRO2 (orig_list, already_seen); | |
| 2187 if (c != '(') | |
| 442 | 2188 RETURN_UNGCPRO (continuable_read_syntax_error ("#s not followed by paren")); |
| 428 | 2189 list = read_list (readcharfun, ')', 0, 0); |
| 2190 orig_list = list; | |
| 2191 { | |
| 2192 int len = XINT (Flength (list)); | |
| 2193 if (len == 0) | |
| 442 | 2194 RETURN_UNGCPRO (continuable_read_syntax_error |
| 428 | 2195 ("structure type not specified")); |
| 2196 if (!(len & 1)) | |
| 2197 RETURN_UNGCPRO | |
| 442 | 2198 (continuable_read_syntax_error |
| 428 | 2199 ("structures must have alternating keyword/value pairs")); |
| 2200 } | |
| 2201 | |
| 2202 st = recognized_structure_type (XCAR (list)); | |
| 2203 if (!st) | |
| 2204 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2205 list2 (build_msg_string |
| 428 | 2206 ("unrecognized structure type"), |
| 2207 XCAR (list)))); | |
| 2208 | |
| 2209 list = Fcdr (list); | |
| 2210 keyword_count = Dynarr_length (st->keywords); | |
| 2211 while (!NILP (list)) | |
| 2212 { | |
| 2213 Lisp_Object keyword, value; | |
| 2214 int i; | |
| 2215 struct structure_keyword_entry *en = NULL; | |
| 2216 | |
| 2217 keyword = Fcar (list); | |
| 2218 list = Fcdr (list); | |
| 2219 value = Fcar (list); | |
| 2220 list = Fcdr (list); | |
| 2221 | |
| 2222 if (!NILP (memq_no_quit (keyword, already_seen))) | |
| 2223 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2224 list2 (build_msg_string |
| 428 | 2225 ("structure keyword already seen"), |
| 2226 keyword))); | |
| 2227 | |
| 2228 for (i = 0; i < keyword_count; i++) | |
| 2229 { | |
| 2230 en = Dynarr_atp (st->keywords, i); | |
| 2231 if (EQ (keyword, en->keyword)) | |
| 2232 break; | |
| 2233 } | |
| 2234 | |
| 2235 if (i == keyword_count) | |
| 2236 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2237 list2 (build_msg_string |
| 428 | 2238 ("unrecognized structure keyword"), |
| 2239 keyword))); | |
| 2240 | |
| 2241 if (en->validate && ! (en->validate) (keyword, value, ERROR_ME)) | |
| 2242 RETURN_UNGCPRO | |
| 2243 (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2244 list3 (build_msg_string |
| 428 | 2245 ("invalid value for structure keyword"), |
| 2246 keyword, value))); | |
| 2247 | |
| 2248 already_seen = Fcons (keyword, already_seen); | |
| 2249 } | |
| 2250 | |
| 2251 if (st->validate && ! (st->validate) (orig_list, ERROR_ME)) | |
| 2252 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2253 list2 (build_msg_string |
| 428 | 2254 ("invalid structure initializer"), |
| 2255 orig_list))); | |
| 2256 | |
| 2257 RETURN_UNGCPRO ((st->instantiate) (XCDR (orig_list))); | |
| 2258 } | |
| 2259 | |
| 2260 | |
| 2261 static Lisp_Object read_compiled_function (Lisp_Object readcharfun, | |
| 2262 int terminator); | |
| 2263 static Lisp_Object read_vector (Lisp_Object readcharfun, int terminator); | |
| 2264 | |
| 2265 /* Get the next character; filter out whitespace and comments */ | |
| 2266 | |
| 867 | 2267 static Ichar |
| 428 | 2268 reader_nextchar (Lisp_Object readcharfun) |
| 2269 { | |
| 2270 /* This function can GC */ | |
| 867 | 2271 Ichar c; |
| 428 | 2272 |
| 2273 retry: | |
| 2274 QUIT; | |
| 2275 c = readchar (readcharfun); | |
| 2276 if (c < 0) | |
| 563 | 2277 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 2278 |
| 2279 switch (c) | |
| 2280 { | |
| 2281 default: | |
| 2282 { | |
| 2283 /* Ignore whitespace and control characters */ | |
| 2284 if (c <= 040) | |
| 2285 goto retry; | |
| 2286 return c; | |
| 2287 } | |
| 2288 | |
| 2289 case ';': | |
| 2290 { | |
| 2291 /* Comment */ | |
| 2292 while ((c = readchar (readcharfun)) >= 0 && c != '\n') | |
| 2293 QUIT; | |
| 2294 goto retry; | |
| 2295 } | |
| 2296 } | |
| 2297 } | |
| 2298 | |
| 2299 #if 0 | |
| 2300 static Lisp_Object | |
| 2301 list2_pure (int pure, Lisp_Object a, Lisp_Object b) | |
| 2302 { | |
| 2303 return pure ? pure_cons (a, pure_cons (b, Qnil)) : list2 (a, b); | |
| 2304 } | |
| 2305 #endif | |
| 2306 | |
| 3543 | 2307 static Lisp_Object |
| 2308 read_string (Lisp_Object readcharfun, Ichar delim, int raw, | |
| 2309 int honor_unicode) | |
| 2310 { | |
| 2311 #ifdef I18N3 | |
| 2312 /* #### If the input stream is translating, then the string | |
| 2313 should be marked as translatable by setting its | |
| 2314 `string-translatable' property to t. .el and .elc files | |
| 2315 normally are translating input streams. See Fgettext() | |
| 2316 and print_internal(). */ | |
| 2317 #endif | |
| 2318 Ichar c; | |
| 2319 int cancel = 0; | |
| 2320 | |
| 2321 Lstream_rewind(XLSTREAM(Vread_buffer_stream)); | |
| 2322 while ((c = readchar(readcharfun)) >= 0 && c != delim) | |
| 2323 { | |
| 2324 if (c == '\\') | |
| 2325 { | |
| 2326 if (raw) | |
| 2327 { | |
| 2328 c = readchar(readcharfun); | |
| 2329 if (honor_unicode && ('u' == c || 'U' == c)) | |
| 2330 { | |
| 2331 c = read_unicode_escape(readcharfun, | |
| 2332 'U' == c ? 8 : 4); | |
| 2333 } | |
| 2334 else | |
| 2335 { | |
| 2336 /* For raw strings, insert the | |
| 2337 backslash and the next char, */ | |
| 2338 Lstream_put_ichar(XLSTREAM | |
| 2339 (Vread_buffer_stream), | |
| 2340 '\\'); | |
| 2341 } | |
| 2342 } | |
| 2343 else | |
| 2344 /* otherwise, backslash escapes the next char. */ | |
| 2345 c = read_escape(readcharfun); | |
| 2346 } | |
| 2347 /* c is -1 if \ newline has just been seen */ | |
| 2348 if (c == -1) | |
| 2349 { | |
| 2350 if (Lstream_byte_count | |
| 2351 (XLSTREAM(Vread_buffer_stream)) == | |
| 2352 0) | |
| 2353 cancel = 1; | |
| 2354 } | |
| 2355 else | |
| 2356 Lstream_put_ichar(XLSTREAM | |
| 2357 (Vread_buffer_stream), | |
| 2358 c); | |
| 2359 QUIT; | |
| 2360 } | |
| 2361 if (c < 0) | |
| 2362 return Fsignal(Qend_of_file, | |
| 2363 list1(READCHARFUN_MAYBE(readcharfun))); | |
| 2364 | |
| 2365 /* If purifying, and string starts with \ newline, | |
| 2366 return zero instead. This is for doc strings | |
| 2367 that we are really going to find in lib-src/DOC.nn.nn */ | |
| 2368 if (purify_flag && NILP(Vinternal_doc_file_name) | |
| 2369 && cancel) | |
| 2370 return Qzero; | |
| 2371 | |
| 2372 Lstream_flush(XLSTREAM(Vread_buffer_stream)); | |
| 2373 return make_string(resizing_buffer_stream_ptr | |
| 2374 (XLSTREAM(Vread_buffer_stream)), | |
| 2375 Lstream_byte_count(XLSTREAM(Vread_buffer_stream))); | |
| 2376 } | |
| 2377 | |
| 2378 static Lisp_Object | |
| 2379 read_raw_string (Lisp_Object readcharfun) | |
| 2380 { | |
| 2381 Ichar c; | |
| 2382 Ichar permit_unicode = 0; | |
| 2383 | |
| 2384 do { | |
| 2385 c = reader_nextchar(readcharfun); | |
| 2386 switch (c) { | |
| 2387 /* #r:engine"my sexy raw string" -- raw string w/ flags*/ | |
| 2388 /* case ':': */ | |
| 2389 /* #ru"Hi there\u20AC \U000020AC" -- raw string, honouring Unicode. */ | |
| 2390 case 'u': | |
| 2391 case 'U': | |
| 2392 permit_unicode = c; | |
| 2393 continue; | |
| 2394 | |
| 2395 /* #r"my raw string" -- raw string */ | |
| 2396 case '\"': | |
| 2397 return read_string(readcharfun, '\"', 1, permit_unicode); | |
| 2398 /* invalid syntax */ | |
| 2399 default: | |
| 2400 { | |
| 2401 if (permit_unicode) | |
| 2402 { | |
| 2403 unreadchar(readcharfun, permit_unicode); | |
| 2404 } | |
| 2405 unreadchar(readcharfun, c); | |
| 2406 return Fsignal(Qinvalid_read_syntax, | |
| 2407 list1(build_string | |
| 2408 ("unrecognized raw string syntax"))); | |
| 2409 } | |
| 2410 } | |
| 2411 } while (1); | |
| 2412 } | |
| 2413 | |
| 428 | 2414 /* Read the next Lisp object from the stream READCHARFUN and return it. |
| 2415 If the return value is a cons whose car is Qunbound, then read1() | |
| 2416 encountered a misplaced token (e.g. a right bracket, right paren, | |
| 2417 or dot followed by a non-number). To filter this stuff out, | |
| 2418 use read0(). */ | |
| 2419 | |
| 2420 static Lisp_Object | |
| 2421 read1 (Lisp_Object readcharfun) | |
| 2422 { | |
| 867 | 2423 Ichar c; |
| 428 | 2424 |
| 2425 retry: | |
| 2426 c = reader_nextchar (readcharfun); | |
| 2427 | |
| 2428 switch (c) | |
| 2429 { | |
| 2430 case '(': | |
| 2431 { | |
| 2432 #ifdef LISP_BACKQUOTES /* old backquote compatibility in lisp reader */ | |
| 2433 /* if this is disabled, then other code in eval.c must be enabled */ | |
| 867 | 2434 Ichar ch = reader_nextchar (readcharfun); |
| 428 | 2435 switch (ch) |
| 2436 { | |
| 2437 case '`': | |
| 2438 { | |
| 2439 Lisp_Object tem; | |
| 853 | 2440 int speccount = internal_bind_int (&old_backquote_flag, |
| 2441 1 + old_backquote_flag); | |
| 428 | 2442 tem = read0 (readcharfun); |
| 771 | 2443 unbind_to (speccount); |
| 428 | 2444 ch = reader_nextchar (readcharfun); |
| 2445 if (ch != ')') | |
| 2446 { | |
| 2447 unreadchar (readcharfun, ch); | |
| 2448 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2449 list1 (build_msg_string |
| 428 | 2450 ("Weird old-backquote syntax"))); |
| 2451 } | |
| 2452 return list2 (Qbacktick, tem); | |
| 2453 } | |
| 2454 case ',': | |
| 2455 { | |
| 2456 if (old_backquote_flag) | |
| 2457 { | |
| 2458 Lisp_Object tem, comma_type; | |
| 2459 ch = readchar (readcharfun); | |
| 2460 if (ch == '@') | |
| 2461 comma_type = Qcomma_at; | |
| 2462 else | |
| 2463 { | |
| 2464 if (ch >= 0) | |
| 2465 unreadchar (readcharfun, ch); | |
| 2466 comma_type = Qcomma; | |
| 2467 } | |
| 2468 tem = read0 (readcharfun); | |
| 2469 ch = reader_nextchar (readcharfun); | |
| 2470 if (ch != ')') | |
| 2471 { | |
| 2472 unreadchar (readcharfun, ch); | |
| 2473 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2474 list1 (build_msg_string |
| 428 | 2475 ("Weird old-backquote syntax"))); |
| 2476 } | |
| 2477 return list2 (comma_type, tem); | |
| 2478 } | |
| 2479 else | |
| 2480 { | |
| 2481 unreadchar (readcharfun, ch); | |
| 2482 #if 0 | |
| 2483 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2484 list1 (build_msg_string ("Comma outside of backquote"))); |
| 428 | 2485 #else |
| 2486 /* #### - yuck....but this is reverse compatible. */ | |
| 2487 /* mostly this is required by edebug, which does its own | |
| 2488 annotated reading. We need to have an annotated_read | |
| 2489 function that records (with markers) the buffer | |
| 2490 positions of the elements that make up lists, then that | |
| 2491 can be used in edebug and bytecomp and the check above | |
| 2492 can go back in. --Stig */ | |
| 2493 break; | |
| 2494 #endif | |
| 2495 } | |
| 2496 } | |
| 2497 default: | |
| 2498 unreadchar (readcharfun, ch); | |
| 2499 } /* switch(ch) */ | |
| 2500 #endif /* old backquote crap... */ | |
| 2501 return read_list (readcharfun, ')', 1, 1); | |
| 2502 } | |
| 2503 case '[': | |
| 2504 return read_vector (readcharfun, ']'); | |
| 2505 | |
| 2506 case ')': | |
| 2507 case ']': | |
| 2508 /* #### - huh? these don't do what they seem... */ | |
| 2509 return noseeum_cons (Qunbound, make_char (c)); | |
| 2510 case '.': | |
| 2511 { | |
| 2512 /* If a period is followed by a number, then we should read it | |
| 2513 as a floating point number. Otherwise, it denotes a dotted | |
| 2514 pair. | |
| 2515 */ | |
| 2516 c = readchar (readcharfun); | |
| 2517 unreadchar (readcharfun, c); | |
| 2518 | |
| 867 | 2519 /* Can't use isdigit on Ichars */ |
| 428 | 2520 if (c < '0' || c > '9') |
| 2521 return noseeum_cons (Qunbound, make_char ('.')); | |
| 2522 | |
| 2523 /* Note that read_atom will loop | |
| 2524 at least once, assuring that we will not try to UNREAD | |
| 2525 two characters in a row. | |
| 2526 (I think this doesn't matter anymore because there should | |
| 2527 be no more danger in unreading multiple characters) */ | |
| 2528 return read_atom (readcharfun, '.', 0); | |
| 2529 } | |
| 2530 | |
| 2531 case '#': | |
| 2532 { | |
| 2533 c = readchar (readcharfun); | |
| 2534 switch (c) | |
| 2535 { | |
| 2536 #if 0 /* FSFmacs silly char-table syntax */ | |
| 2537 case '^': | |
| 2538 #endif | |
| 2539 #if 0 /* FSFmacs silly bool-vector syntax */ | |
| 2540 case '&': | |
| 2541 #endif | |
| 2542 /* "#["-- byte-code constant syntax */ | |
| 2543 /* purecons #[...] syntax */ | |
| 2544 case '[': return read_compiled_function (readcharfun, ']' | |
| 2545 /*, purify_flag */ ); | |
| 2546 /* "#:"-- gensym syntax */ | |
| 2547 case ':': return read_atom (readcharfun, -1, 1); | |
| 2548 /* #'x => (function x) */ | |
| 2549 case '\'': return list2 (Qfunction, read0 (readcharfun)); | |
| 2550 #if 0 | |
| 2551 /* RMS uses this syntax for fat-strings. | |
| 2552 If we use it for vectors, then obscure bugs happen. | |
| 2553 */ | |
| 2554 /* "#(" -- Scheme/CL vector syntax */ | |
| 2555 case '(': return read_vector (readcharfun, ')'); | |
| 2556 #endif | |
| 2557 #if 0 /* FSFmacs */ | |
| 2558 case '(': | |
| 2559 { | |
| 2560 Lisp_Object tmp; | |
| 2561 struct gcpro gcpro1; | |
| 2562 | |
| 2563 /* Read the string itself. */ | |
| 2564 tmp = read1 (readcharfun); | |
| 2565 if (!STRINGP (tmp)) | |
| 2566 { | |
| 2567 if (CONSP (tmp) && UNBOUNDP (XCAR (tmp))) | |
| 853 | 2568 free_cons (tmp); |
| 428 | 2569 return Fsignal (Qinvalid_read_syntax, |
| 2570 list1 (build_string ("#"))); | |
| 2571 } | |
| 2572 GCPRO1 (tmp); | |
| 2573 /* Read the intervals and their properties. */ | |
| 2574 while (1) | |
| 2575 { | |
| 2576 Lisp_Object beg, end, plist; | |
| 867 | 2577 Ichar ch; |
| 428 | 2578 int invalid = 0; |
| 2579 | |
| 2580 beg = read1 (readcharfun); | |
| 2581 if (CONSP (beg) && UNBOUNDP (XCAR (beg))) | |
| 2582 { | |
| 2583 ch = XCHAR (XCDR (beg)); | |
| 853 | 2584 free_cons (beg); |
| 428 | 2585 if (ch == ')') |
| 2586 break; | |
| 2587 else | |
| 2588 invalid = 1; | |
| 2589 } | |
| 2590 if (!invalid) | |
| 2591 { | |
| 2592 end = read1 (readcharfun); | |
| 2593 if (CONSP (end) && UNBOUNDP (XCAR (end))) | |
| 2594 { | |
| 853 | 2595 free_cons (end); |
| 428 | 2596 invalid = 1; |
| 2597 } | |
| 2598 } | |
| 2599 if (!invalid) | |
| 2600 { | |
| 2601 plist = read1 (readcharfun); | |
| 2602 if (CONSP (plist) && UNBOUNDP (XCAR (plist))) | |
| 2603 { | |
| 853 | 2604 free_cons (plist); |
| 428 | 2605 invalid = 1; |
| 2606 } | |
| 2607 } | |
| 2608 if (invalid) | |
| 2609 RETURN_UNGCPRO | |
| 2610 (Fsignal (Qinvalid_read_syntax, | |
| 2611 list2 | |
| 771 | 2612 (build_msg_string ("invalid string property list"), |
| 428 | 2613 XCDR (plist)))); |
| 2614 Fset_text_properties (beg, end, plist, tmp); | |
| 2615 } | |
| 2616 UNGCPRO; | |
| 2617 return tmp; | |
| 2618 } | |
| 2619 #endif /* 0 */ | |
| 2620 case '@': | |
| 2621 { | |
| 2622 /* #@NUMBER is used to skip NUMBER following characters. | |
| 2623 That's used in .elc files to skip over doc strings | |
| 2624 and function definitions. */ | |
| 2625 int i, nskip = 0; | |
| 2626 | |
| 2627 /* Read a decimal integer. */ | |
| 2628 while ((c = readchar (readcharfun)) >= 0 | |
| 2629 && c >= '0' && c <= '9') | |
| 2630 nskip = (10 * nskip) + (c - '0'); | |
| 2631 if (c >= 0) | |
| 2632 unreadchar (readcharfun, c); | |
| 2633 | |
| 2634 /* FSF has code here that maybe caches the skipped | |
| 2635 string. See above for why this is totally | |
| 2636 losing. We handle this differently. */ | |
| 2637 | |
| 2638 /* Skip that many characters. */ | |
| 2639 for (i = 0; i < nskip && c >= 0; i++) | |
| 2640 c = readchar (readcharfun); | |
| 2641 | |
| 2642 goto retry; | |
| 2643 } | |
| 2644 case '$': return Vload_file_name_internal; | |
| 2645 /* bit vectors */ | |
| 2646 case '*': return read_bit_vector (readcharfun); | |
| 2647 /* #o10 => 8 -- octal constant syntax */ | |
| 2648 case 'o': return read_integer (readcharfun, 8); | |
| 2649 /* #xdead => 57005 -- hex constant syntax */ | |
| 2650 case 'x': return read_integer (readcharfun, 16); | |
| 2651 /* #b010 => 2 -- binary constant syntax */ | |
| 2652 case 'b': return read_integer (readcharfun, 2); | |
| 3543 | 2653 /* #r"raw\stringt" -- raw string syntax */ |
| 2654 case 'r': return read_raw_string(readcharfun); | |
| 428 | 2655 /* #s(foobar key1 val1 key2 val2) -- structure syntax */ |
| 2656 case 's': return read_structure (readcharfun); | |
| 2657 case '<': | |
| 2658 { | |
| 2659 unreadchar (readcharfun, c); | |
| 2660 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2661 list1 (build_msg_string ("Cannot read unreadable object"))); |
| 428 | 2662 } |
| 2663 #ifdef FEATUREP_SYNTAX | |
| 2664 case '+': | |
| 2665 case '-': | |
| 2666 { | |
| 456 | 2667 Lisp_Object feature_exp, obj, tem; |
| 428 | 2668 struct gcpro gcpro1, gcpro2; |
| 2669 | |
| 456 | 2670 feature_exp = read0(readcharfun); |
| 428 | 2671 obj = read0(readcharfun); |
| 2672 | |
| 2673 /* the call to `featurep' may GC. */ | |
| 456 | 2674 GCPRO2 (feature_exp, obj); |
| 2675 tem = call1 (Qfeaturep, feature_exp); | |
| 428 | 2676 UNGCPRO; |
| 2677 | |
| 2678 if (c == '+' && NILP(tem)) goto retry; | |
| 2679 if (c == '-' && !NILP(tem)) goto retry; | |
| 2680 return obj; | |
| 2681 } | |
| 2682 #endif | |
| 2683 case '0': case '1': case '2': case '3': case '4': | |
| 2684 case '5': case '6': case '7': case '8': case '9': | |
| 2685 /* Reader forms that can reuse previously read objects. */ | |
| 2686 { | |
| 2687 int n = 0; | |
| 2688 Lisp_Object found; | |
| 2689 | |
| 2690 /* Using read_integer() here is impossible, because it | |
| 2691 chokes on `='. Using parse_integer() is too hard. | |
| 2692 So we simply read it in, and ignore overflows, which | |
| 2693 is safe. */ | |
| 2694 while (c >= '0' && c <= '9') | |
| 2695 { | |
| 2696 n *= 10; | |
| 2697 n += c - '0'; | |
| 2698 c = readchar (readcharfun); | |
| 2699 } | |
| 2700 found = assq_no_quit (make_int (n), Vread_objects); | |
| 2701 if (c == '=') | |
| 2702 { | |
| 2703 /* #n=object returns object, but associates it with | |
| 2704 n for #n#. */ | |
| 2705 Lisp_Object obj; | |
| 2706 if (CONSP (found)) | |
| 2707 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2708 list2 (build_msg_string |
| 428 | 2709 ("Multiply defined symbol label"), |
| 2710 make_int (n))); | |
| 2711 obj = read0 (readcharfun); | |
| 2712 Vread_objects = Fcons (Fcons (make_int (n), obj), | |
| 2713 Vread_objects); | |
| 2714 return obj; | |
| 2715 } | |
| 2716 else if (c == '#') | |
| 2717 { | |
| 2718 /* #n# returns a previously read object. */ | |
| 2719 if (CONSP (found)) | |
| 2720 return XCDR (found); | |
| 2721 else | |
| 2722 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2723 list2 (build_msg_string |
| 428 | 2724 ("Undefined symbol label"), |
| 2725 make_int (n))); | |
| 2726 } | |
| 2727 return Fsignal (Qinvalid_read_syntax, | |
| 2728 list1 (build_string ("#"))); | |
| 2729 } | |
| 2730 default: | |
| 2731 { | |
| 2732 unreadchar (readcharfun, c); | |
| 2733 return Fsignal (Qinvalid_read_syntax, | |
| 2734 list1 (build_string ("#"))); | |
| 2735 } | |
| 2736 } | |
| 2737 } | |
| 2738 | |
| 2739 /* Quote */ | |
| 2740 case '\'': return list2 (Qquote, read0 (readcharfun)); | |
| 2741 | |
| 2742 #ifdef LISP_BACKQUOTES | |
| 2743 case '`': | |
| 2744 { | |
| 2745 Lisp_Object tem; | |
| 853 | 2746 int speccount = internal_bind_int (&new_backquote_flag, |
| 2747 1 + new_backquote_flag); | |
| 428 | 2748 tem = read0 (readcharfun); |
| 771 | 2749 unbind_to (speccount); |
| 428 | 2750 return list2 (Qbackquote, tem); |
| 2751 } | |
| 2752 | |
| 2753 case ',': | |
| 2754 { | |
| 2755 if (new_backquote_flag) | |
| 2756 { | |
| 2757 Lisp_Object comma_type = Qnil; | |
| 2758 int ch = readchar (readcharfun); | |
| 2759 | |
| 2760 if (ch == '@') | |
| 2761 comma_type = Qcomma_at; | |
| 2762 else if (ch == '.') | |
| 2763 comma_type = Qcomma_dot; | |
| 2764 else | |
| 2765 { | |
| 2766 if (ch >= 0) | |
| 2767 unreadchar (readcharfun, ch); | |
| 2768 comma_type = Qcomma; | |
| 2769 } | |
| 2770 return list2 (comma_type, read0 (readcharfun)); | |
| 2771 } | |
| 2772 else | |
| 2773 { | |
| 2774 /* YUCK. 99.999% backwards compatibility. The Right | |
| 2775 Thing(tm) is to signal an error here, because it's | |
| 2776 really invalid read syntax. Instead, this permits | |
| 2777 commas to begin symbols (unless they're inside | |
| 2778 backquotes). If an error is signalled here in the | |
| 2779 future, then commas should be invalid read syntax | |
| 2780 outside of backquotes anywhere they're found (i.e. | |
| 2781 they must be quoted in symbols) -- Stig */ | |
| 2782 return read_atom (readcharfun, c, 0); | |
| 2783 } | |
| 2784 } | |
| 2785 #endif | |
| 2786 | |
| 2787 case '?': | |
| 2788 { | |
| 2789 /* Evil GNU Emacs "character" (ie integer) syntax */ | |
| 2790 c = readchar (readcharfun); | |
| 2791 if (c < 0) | |
| 2792 return Fsignal (Qend_of_file, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 2793 | |
| 2794 if (c == '\\') | |
| 2795 c = read_escape (readcharfun); | |
| 4439 | 2796 if (c < 0) |
| 2797 return Fsignal (Qinvalid_read_syntax, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 428 | 2798 return make_char (c); |
| 2799 } | |
| 2800 | |
| 2801 case '\"': | |
| 3543 | 2802 /* String */ |
| 2803 return read_string(readcharfun, '\"', 0, 1); | |
| 428 | 2804 |
| 2805 default: | |
| 2806 { | |
| 2807 /* Ignore whitespace and control characters */ | |
| 2808 if (c <= 040) | |
| 2809 goto retry; | |
| 2810 return read_atom (readcharfun, c, 0); | |
| 2811 } | |
| 2812 } | |
| 2813 } | |
| 2814 | |
| 2815 | |
| 2816 | |
| 2817 #define LEAD_INT 1 | |
| 2818 #define DOT_CHAR 2 | |
| 2819 #define TRAIL_INT 4 | |
| 2820 #define E_CHAR 8 | |
| 2821 #define EXP_INT 16 | |
| 2822 | |
| 2823 int | |
| 442 | 2824 isfloat_string (const char *cp) |
| 428 | 2825 { |
| 2826 int state = 0; | |
| 867 | 2827 const Ibyte *ucp = (const Ibyte *) cp; |
| 428 | 2828 |
| 2829 if (*ucp == '+' || *ucp == '-') | |
| 2830 ucp++; | |
| 2831 | |
| 2832 if (*ucp >= '0' && *ucp <= '9') | |
| 2833 { | |
| 2834 state |= LEAD_INT; | |
| 2835 while (*ucp >= '0' && *ucp <= '9') | |
| 2836 ucp++; | |
| 2837 } | |
| 2838 if (*ucp == '.') | |
| 2839 { | |
| 2840 state |= DOT_CHAR; | |
| 2841 ucp++; | |
| 2842 } | |
| 2843 if (*ucp >= '0' && *ucp <= '9') | |
| 2844 { | |
| 2845 state |= TRAIL_INT; | |
| 2846 while (*ucp >= '0' && *ucp <= '9') | |
| 2847 ucp++; | |
| 2848 } | |
| 2849 if (*ucp == 'e' || *ucp == 'E') | |
| 2850 { | |
| 2851 state |= E_CHAR; | |
| 2852 ucp++; | |
| 2853 if ((*ucp == '+') || (*ucp == '-')) | |
| 2854 ucp++; | |
| 2855 } | |
| 2856 | |
| 2857 if (*ucp >= '0' && *ucp <= '9') | |
| 2858 { | |
| 2859 state |= EXP_INT; | |
| 2860 while (*ucp >= '0' && *ucp <= '9') | |
| 2861 ucp++; | |
| 2862 } | |
| 2863 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t') || (*ucp == '\n') | |
| 2864 || (*ucp == '\r') || (*ucp == '\f')) | |
| 2865 && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) | |
| 2866 || state == (DOT_CHAR|TRAIL_INT) | |
| 2867 || state == (LEAD_INT|E_CHAR|EXP_INT) | |
| 2868 || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) | |
| 2869 || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
| 2870 } | |
| 1983 | 2871 |
| 2872 #ifdef HAVE_RATIO | |
| 2873 int | |
| 2874 isratio_string (const char *cp) | |
| 2875 { | |
| 2010 | 2876 /* Possible minus/plus sign */ |
| 2877 if (*cp == '-' || *cp == '+') | |
| 1983 | 2878 cp++; |
| 2879 | |
| 2880 /* Numerator */ | |
| 2881 if (*cp < '0' || *cp > '9') | |
| 2882 return 0; | |
| 2883 | |
| 2884 do { | |
| 2885 cp++; | |
| 2886 } while (*cp >= '0' && *cp <= '9'); | |
| 2887 | |
| 2888 /* Slash */ | |
| 2889 if (*cp++ != '/') | |
| 2890 return 0; | |
| 2891 | |
| 2892 /* Denominator */ | |
| 2893 if (*cp < '0' || *cp > '9') | |
| 2894 return 0; | |
| 2895 | |
| 2896 do { | |
| 2897 cp++; | |
| 2898 } while (*cp >= '0' && *cp <= '9'); | |
| 2899 | |
| 2900 return *cp == '\0' || *cp == ' ' || *cp =='\t' || *cp == '\n' || | |
| 2901 *cp == '\r' || *cp == '\f'; | |
| 2902 } | |
| 2903 #endif | |
| 428 | 2904 |
| 2905 static void * | |
| 2906 sequence_reader (Lisp_Object readcharfun, | |
| 867 | 2907 Ichar terminator, |
| 428 | 2908 void *state, |
| 2909 void * (*conser) (Lisp_Object readcharfun, | |
| 2910 void *state, Charcount len)) | |
| 2911 { | |
| 2912 Charcount len; | |
| 2913 | |
| 2914 for (len = 0; ; len++) | |
| 2915 { | |
| 867 | 2916 Ichar ch; |
| 428 | 2917 |
| 2918 QUIT; | |
| 2919 ch = reader_nextchar (readcharfun); | |
| 2920 | |
| 2921 if (ch == terminator) | |
| 2922 return state; | |
| 2923 else | |
| 2924 unreadchar (readcharfun, ch); | |
| 2925 #ifdef FEATUREP_SYNTAX | |
| 2926 if (ch == ']') | |
| 442 | 2927 read_syntax_error ("\"]\" in a list"); |
| 428 | 2928 else if (ch == ')') |
| 442 | 2929 read_syntax_error ("\")\" in a vector"); |
| 428 | 2930 #endif |
| 2931 state = ((conser) (readcharfun, state, len)); | |
| 2932 } | |
| 2933 } | |
| 2934 | |
| 2935 | |
| 2936 struct read_list_state | |
| 2937 { | |
| 2938 Lisp_Object head; | |
| 2939 Lisp_Object tail; | |
| 2940 int length; | |
| 2941 int allow_dotted_lists; | |
| 867 | 2942 Ichar terminator; |
| 428 | 2943 }; |
| 2944 | |
| 2945 static void * | |
| 2286 | 2946 read_list_conser (Lisp_Object readcharfun, void *state, Charcount UNUSED (len)) |
| 428 | 2947 { |
| 2948 struct read_list_state *s = (struct read_list_state *) state; | |
| 2949 Lisp_Object elt; | |
| 2950 | |
| 2951 elt = read1 (readcharfun); | |
| 2952 | |
| 2953 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2954 { | |
| 2955 Lisp_Object tem = elt; | |
| 867 | 2956 Ichar ch; |
| 428 | 2957 |
| 2958 elt = XCDR (elt); | |
| 853 | 2959 free_cons (tem); |
| 428 | 2960 tem = Qnil; |
| 2961 ch = XCHAR (elt); | |
| 2962 #ifdef FEATUREP_SYNTAX | |
| 2963 if (ch == s->terminator) /* deal with #+, #- reader macros */ | |
| 2964 { | |
| 2965 unreadchar (readcharfun, s->terminator); | |
| 2966 goto done; | |
| 2967 } | |
| 2968 else if (ch == ']') | |
| 442 | 2969 read_syntax_error ("']' in a list"); |
| 428 | 2970 else if (ch == ')') |
| 442 | 2971 read_syntax_error ("')' in a vector"); |
| 428 | 2972 else |
| 2973 #endif | |
| 2974 if (ch != '.') | |
| 563 | 2975 signal_error (Qinternal_error, "BUG! Internal reader error", elt); |
| 428 | 2976 else if (!s->allow_dotted_lists) |
| 442 | 2977 read_syntax_error ("\".\" in a vector"); |
| 428 | 2978 else |
| 2979 { | |
| 2980 if (!NILP (s->tail)) | |
| 2981 XCDR (s->tail) = read0 (readcharfun); | |
| 2982 else | |
| 2983 s->head = read0 (readcharfun); | |
| 2984 elt = read1 (readcharfun); | |
| 2985 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2986 { | |
| 2987 ch = XCHAR (XCDR (elt)); | |
| 853 | 2988 free_cons (elt); |
| 428 | 2989 if (ch == s->terminator) |
| 2990 { | |
| 2991 unreadchar (readcharfun, s->terminator); | |
| 2992 goto done; | |
| 2993 } | |
| 2994 } | |
| 442 | 2995 read_syntax_error (". in wrong context"); |
| 428 | 2996 } |
| 2997 } | |
| 2998 | |
| 2999 elt = Fcons (elt, Qnil); | |
| 3000 if (!NILP (s->tail)) | |
| 3001 XCDR (s->tail) = elt; | |
| 3002 else | |
| 3003 s->head = elt; | |
| 3004 s->tail = elt; | |
| 3005 done: | |
| 3006 s->length++; | |
| 3007 return s; | |
| 3008 } | |
| 3009 | |
| 3010 | |
| 814 | 3011 /* allow_dotted_lists means that something like (foo bar . baz) |
| 3012 is acceptable. If -1, means check for starting with defun | |
| 3013 and make structure pure. (not implemented, probably for very | |
| 3014 good reasons) | |
| 3015 | |
| 3016 If check_for_doc_references, look for (#$ . INT) doc references | |
| 3017 in the list and record if load_force_doc_strings is non-zero. | |
| 3018 (Such doc references will be destroyed during the loadup phase | |
| 3019 by replacing with Qzero, because Snarf-documentation will fill | |
| 3020 them in again.) | |
| 3021 | |
| 3022 WARNING: If you set this, you sure as hell better not call | |
| 3023 free_list() on the returned list here. | |
| 3024 */ | |
| 428 | 3025 |
| 3026 static Lisp_Object | |
| 3027 read_list (Lisp_Object readcharfun, | |
| 867 | 3028 Ichar terminator, |
| 428 | 3029 int allow_dotted_lists, |
| 3030 int check_for_doc_references) | |
| 3031 { | |
| 3032 struct read_list_state s; | |
| 3033 struct gcpro gcpro1, gcpro2; | |
| 3034 | |
| 3035 s.head = Qnil; | |
| 3036 s.tail = Qnil; | |
| 3037 s.length = 0; | |
| 3038 s.allow_dotted_lists = allow_dotted_lists; | |
| 3039 s.terminator = terminator; | |
| 3040 GCPRO2 (s.head, s.tail); | |
| 3041 | |
| 3042 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3043 | |
| 3044 if ((purify_flag || load_force_doc_strings) && check_for_doc_references) | |
| 3045 { | |
| 3046 /* check now for any doc string references and record them | |
| 3047 for later. */ | |
| 3048 Lisp_Object tail; | |
| 3049 | |
| 3050 /* We might be dealing with an imperfect list so don't | |
| 3051 use LIST_LOOP */ | |
| 3052 for (tail = s.head; CONSP (tail); tail = XCDR (tail)) | |
| 3053 { | |
| 3054 Lisp_Object holding_cons = Qnil; | |
| 3055 | |
| 3056 { | |
| 3057 Lisp_Object elem = XCAR (tail); | |
| 3058 /* elem might be (#$ . INT) ... */ | |
| 3059 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3060 holding_cons = tail; | |
| 3061 /* or it might be (quote (#$ . INT)) i.e. | |
| 3062 (quote . ((#$ . INT) . nil)) in the case of | |
| 3063 `autoload' (autoload evaluates its arguments, while | |
| 3064 `defvar', `defun', etc. don't). */ | |
| 3065 if (CONSP (elem) && EQ (XCAR (elem), Qquote) | |
| 3066 && CONSP (XCDR (elem))) | |
| 3067 { | |
| 3068 elem = XCAR (XCDR (elem)); | |
| 3069 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3070 holding_cons = XCDR (XCAR (tail)); | |
| 3071 } | |
| 3072 } | |
| 3073 | |
| 3074 if (CONSP (holding_cons)) | |
| 3075 { | |
| 3076 if (purify_flag) | |
| 3077 { | |
| 3078 if (NILP (Vinternal_doc_file_name)) | |
| 3079 /* We have not yet called Snarf-documentation, so | |
| 3080 assume this file is described in the DOC file | |
| 3081 and Snarf-documentation will fill in the right | |
| 3082 value later. For now, replace the whole list | |
| 3083 with 0. */ | |
| 3084 XCAR (holding_cons) = Qzero; | |
| 3085 else | |
| 3086 /* We have already called Snarf-documentation, so | |
| 3087 make a relative file name for this file, so it | |
| 3088 can be found properly in the installed Lisp | |
| 3089 directory. We don't use Fexpand_file_name | |
| 3090 because that would make the directory absolute | |
| 3091 now. */ | |
| 3092 XCAR (XCAR (holding_cons)) = | |
| 3093 concat2 (build_string ("../lisp/"), | |
| 3094 Ffile_name_nondirectory | |
| 3095 (Vload_file_name_internal)); | |
| 3096 } | |
| 3097 else | |
| 3098 /* Not pure. Just add to Vload_force_doc_string_list, | |
| 3099 and the string will be filled in properly in | |
| 3100 load_force_doc_string_unwind(). */ | |
| 3101 Vload_force_doc_string_list = | |
| 3102 /* We pass the cons that holds the (#$ . INT) so we | |
| 3103 can modify it in-place. */ | |
| 3104 Fcons (holding_cons, Vload_force_doc_string_list); | |
| 3105 } | |
| 3106 } | |
| 3107 } | |
| 3108 | |
| 3109 UNGCPRO; | |
| 3110 return s.head; | |
| 3111 } | |
| 3112 | |
| 3113 static Lisp_Object | |
| 3114 read_vector (Lisp_Object readcharfun, | |
| 867 | 3115 Ichar terminator) |
| 428 | 3116 { |
| 3117 Lisp_Object tem; | |
| 3118 Lisp_Object *p; | |
| 3119 int len; | |
| 3120 int i; | |
| 3121 struct read_list_state s; | |
| 3122 struct gcpro gcpro1, gcpro2; | |
| 3123 | |
| 3124 s.head = Qnil; | |
| 3125 s.tail = Qnil; | |
| 3126 s.length = 0; | |
| 3127 s.allow_dotted_lists = 0; | |
| 3128 GCPRO2 (s.head, s.tail); | |
| 3129 | |
| 3130 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3131 | |
| 3132 UNGCPRO; | |
| 3133 tem = s.head; | |
| 3134 len = XINT (Flength (tem)); | |
| 3135 | |
| 814 | 3136 s.head = make_vector (len, Qnil); |
| 428 | 3137 |
| 3138 for (i = 0, p = &(XVECTOR_DATA (s.head)[0]); | |
| 3139 i < len; | |
| 3140 i++, p++) | |
| 3141 { | |
| 853 | 3142 Lisp_Object otem = tem; |
| 428 | 3143 tem = Fcar (tem); |
| 3144 *p = tem; | |
| 853 | 3145 tem = XCDR (otem); |
| 428 | 3146 free_cons (otem); |
| 3147 } | |
| 3148 return s.head; | |
| 3149 } | |
| 3150 | |
| 3151 static Lisp_Object | |
| 867 | 3152 read_compiled_function (Lisp_Object readcharfun, Ichar terminator) |
| 428 | 3153 { |
| 3154 /* Accept compiled functions at read-time so that we don't | |
| 3155 have to build them at load-time. */ | |
| 3156 Lisp_Object stuff; | |
| 3157 Lisp_Object make_byte_code_args[COMPILED_DOMAIN + 1]; | |
| 3158 struct gcpro gcpro1; | |
| 3159 int len; | |
| 3160 int iii; | |
| 3161 int saw_a_doc_ref = 0; | |
| 3162 | |
| 3163 /* Note: we tell read_list not to search for doc references | |
| 3164 because we need to handle the "doc reference" for the | |
| 3165 instructions and constants differently. */ | |
| 3166 stuff = read_list (readcharfun, terminator, 0, 0); | |
| 3167 len = XINT (Flength (stuff)); | |
| 3168 if (len < COMPILED_STACK_DEPTH + 1 || len > COMPILED_DOMAIN + 1) | |
| 3169 return | |
| 442 | 3170 continuable_read_syntax_error ("#[...] used with wrong number of elements"); |
| 428 | 3171 |
| 3172 for (iii = 0; CONSP (stuff); iii++) | |
| 3173 { | |
| 853 | 3174 Lisp_Object victim = stuff; |
| 428 | 3175 make_byte_code_args[iii] = Fcar (stuff); |
| 3176 if ((purify_flag || load_force_doc_strings) | |
| 3177 && CONSP (make_byte_code_args[iii]) | |
| 3178 && EQ (XCAR (make_byte_code_args[iii]), Vload_file_name_internal)) | |
| 3179 { | |
| 3180 if (purify_flag && iii == COMPILED_DOC_STRING) | |
| 3181 { | |
| 3182 /* same as in read_list(). */ | |
| 3183 if (NILP (Vinternal_doc_file_name)) | |
| 3184 make_byte_code_args[iii] = Qzero; | |
| 3185 else | |
| 3186 XCAR (make_byte_code_args[iii]) = | |
| 3187 concat2 (build_string ("../lisp/"), | |
| 3188 Ffile_name_nondirectory | |
| 3189 (Vload_file_name_internal)); | |
| 3190 } | |
| 3191 else | |
| 3192 saw_a_doc_ref = 1; | |
| 3193 } | |
| 3194 stuff = Fcdr (stuff); | |
| 3195 free_cons (victim); | |
| 3196 } | |
| 3197 GCPRO1 (make_byte_code_args[0]); | |
| 3198 gcpro1.nvars = len; | |
| 3199 | |
| 3200 /* v18 or v19 bytecode file. Need to Ebolify. */ | |
| 3201 if (load_byte_code_version < 20 && VECTORP (make_byte_code_args[2])) | |
| 3202 ebolify_bytecode_constants (make_byte_code_args[2]); | |
| 3203 | |
| 3204 /* make-byte-code looks at purify_flag, which should have the same | |
| 3205 * value as our "read-pure" argument */ | |
| 3206 stuff = Fmake_byte_code (len, make_byte_code_args); | |
| 3207 XCOMPILED_FUNCTION (stuff)->flags.ebolified = (load_byte_code_version < 20); | |
| 3208 if (saw_a_doc_ref) | |
| 3209 Vload_force_doc_string_list = Fcons (stuff, Vload_force_doc_string_list); | |
| 3210 UNGCPRO; | |
| 3211 return stuff; | |
| 3212 } | |
| 3213 | |
| 3214 | |
| 3215 | |
| 3216 void | |
| 3217 init_lread (void) | |
| 3218 { | |
| 3219 Vvalues = Qnil; | |
| 3220 | |
| 3221 load_in_progress = 0; | |
| 3222 | |
| 3223 Vload_descriptor_list = Qnil; | |
| 3224 | |
| 3225 /* kludge: locate-file does not work for a null load-path, even if | |
| 3226 the file name is absolute. */ | |
| 3227 | |
| 3228 Vload_path = Fcons (build_string (""), Qnil); | |
| 3229 | |
| 3230 /* This used to get initialized in init_lread because all streams | |
| 3231 got closed when dumping occurs. This is no longer true -- | |
| 3232 Vread_buffer_stream is a resizing output stream, and there is no | |
| 3233 reason to close it at dump-time. | |
| 3234 | |
| 3235 Vread_buffer_stream is set to Qnil in vars_of_lread, and this | |
| 3236 will initialize it only once, at dump-time. */ | |
| 3237 if (NILP (Vread_buffer_stream)) | |
| 3238 Vread_buffer_stream = make_resizing_buffer_output_stream (); | |
| 3239 | |
| 3240 Vload_force_doc_string_list = Qnil; | |
|
4608
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Make #$ truly read-only for Lisp; check this in the test suite.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4483
diff
changeset
|
3241 |
|
1e3cf11fa27d
Make #$ truly read-only for Lisp; check this in the test suite.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4483
diff
changeset
|
3242 Vload_file_name_internal = Qnil; |
|
1e3cf11fa27d
Make #$ truly read-only for Lisp; check this in the test suite.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4483
diff
changeset
|
3243 Vload_file_name = Qnil; |
| 428 | 3244 } |
| 3245 | |
| 3246 void | |
| 3247 syms_of_lread (void) | |
| 3248 { | |
| 3249 DEFSUBR (Fread); | |
| 3250 DEFSUBR (Fread_from_string); | |
| 3251 DEFSUBR (Fload_internal); | |
| 3252 DEFSUBR (Flocate_file); | |
| 3253 DEFSUBR (Flocate_file_clear_hashing); | |
| 3254 DEFSUBR (Feval_buffer); | |
| 3255 DEFSUBR (Feval_region); | |
| 3256 | |
| 563 | 3257 DEFSYMBOL (Qstandard_input); |
| 3258 DEFSYMBOL (Qread_char); | |
| 3259 DEFSYMBOL (Qload); | |
| 1292 | 3260 DEFSYMBOL (Qload_internal); |
| 563 | 3261 DEFSYMBOL (Qfset); |
| 428 | 3262 |
| 3263 #ifdef LISP_BACKQUOTES | |
| 563 | 3264 DEFSYMBOL (Qbackquote); |
| 428 | 3265 defsymbol (&Qbacktick, "`"); |
| 3266 defsymbol (&Qcomma, ","); | |
| 3267 defsymbol (&Qcomma_at, ",@"); | |
| 3268 defsymbol (&Qcomma_dot, ",."); | |
| 3269 #endif | |
| 3270 | |
| 563 | 3271 DEFSYMBOL (Qexists); |
| 3272 DEFSYMBOL (Qreadable); | |
| 3273 DEFSYMBOL (Qwritable); | |
| 3274 DEFSYMBOL (Qexecutable); | |
| 428 | 3275 } |
| 3276 | |
| 3277 void | |
| 3278 structure_type_create (void) | |
| 3279 { | |
| 3280 the_structure_type_dynarr = Dynarr_new (structure_type); | |
| 3281 } | |
| 3282 | |
| 3283 void | |
| 3284 reinit_vars_of_lread (void) | |
| 3285 { | |
| 3286 Vread_buffer_stream = Qnil; | |
| 3287 staticpro_nodump (&Vread_buffer_stream); | |
| 3288 } | |
| 3289 | |
| 3290 void | |
| 3291 vars_of_lread (void) | |
| 3292 { | |
| 3293 DEFVAR_LISP ("values", &Vvalues /* | |
| 3294 List of values of all expressions which were read, evaluated and printed. | |
| 3295 Order is reverse chronological. | |
| 3296 */ ); | |
| 3297 | |
| 3298 DEFVAR_LISP ("standard-input", &Vstandard_input /* | |
| 3299 Stream for read to get input from. | |
| 3300 See documentation of `read' for possible values. | |
| 3301 */ ); | |
| 3302 Vstandard_input = Qt; | |
| 3303 | |
| 3304 DEFVAR_LISP ("load-path", &Vload_path /* | |
| 3305 *List of directories to search for files to load. | |
| 3306 Each element is a string (directory name) or nil (try default directory). | |
| 3307 | |
| 3308 Note that the elements of this list *may not* begin with "~", so you must | |
| 3309 call `expand-file-name' on them before adding them to this list. | |
| 3310 | |
| 3311 Initialized based on EMACSLOADPATH environment variable, if any, | |
| 3312 otherwise to default specified in by file `paths.h' when XEmacs was built. | |
| 3313 If there were no paths specified in `paths.h', then XEmacs chooses a default | |
| 3314 value for this variable by looking around in the file-system near the | |
| 3315 directory in which the XEmacs executable resides. | |
| 3316 */ ); | |
| 3317 Vload_path = Qnil; | |
| 3318 | |
| 3319 /* xxxDEFVAR_LISP ("dump-load-path", &Vdump_load_path, | |
| 3320 "*Location of lisp files to be used when dumping ONLY."); */ | |
| 3321 | |
| 3322 DEFVAR_BOOL ("load-in-progress", &load_in_progress /* | |
| 3323 Non-nil iff inside of `load'. | |
| 3324 */ ); | |
| 3325 | |
| 2548 | 3326 DEFVAR_LISP ("load-suppress-alist", &Vload_suppress_alist /* |
| 3327 An alist of expressions controlling whether particular files can be loaded. | |
| 3328 Each element looks like (FILENAME EXPR). | |
| 3329 FILENAME should be a full pathname, but without the .el suffix. | |
| 3330 When `load' is run and is about to load the specified file, it evaluates | |
| 3331 the form to determine if the file can be loaded. | |
| 3332 This variable is normally initialized automatically. | |
| 3333 */ ); | |
| 3334 Vload_suppress_alist = Qnil; | |
| 3335 | |
| 428 | 3336 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist /* |
| 3337 An alist of expressions to be evalled when particular files are loaded. | |
| 3338 Each element looks like (FILENAME FORMS...). | |
| 3339 When `load' is run and the file-name argument is FILENAME, | |
| 3340 the FORMS in the corresponding element are executed at the end of loading. | |
| 3341 | |
| 3342 FILENAME must match exactly! Normally FILENAME is the name of a library, | |
| 3343 with no directory specified, since that is how `load' is normally called. | |
| 3344 An error in FORMS does not undo the load, | |
| 3345 but does prevent execution of the rest of the FORMS. | |
| 3346 */ ); | |
| 3347 Vafter_load_alist = Qnil; | |
| 3348 | |
| 3349 DEFVAR_BOOL ("load-warn-when-source-newer", &load_warn_when_source_newer /* | |
| 3350 *Whether `load' should check whether the source is newer than the binary. | |
| 3351 If this variable is true, then when a `.elc' file is being loaded and the | |
| 3352 corresponding `.el' is newer, a warning message will be printed. | |
| 3353 */ ); | |
| 1261 | 3354 load_warn_when_source_newer = 1; |
| 428 | 3355 |
| 3356 DEFVAR_BOOL ("load-warn-when-source-only", &load_warn_when_source_only /* | |
| 3357 *Whether `load' should warn when loading a `.el' file instead of an `.elc'. | |
| 3358 If this variable is true, then when `load' is called with a filename without | |
| 3359 an extension, and the `.elc' version doesn't exist but the `.el' version does, | |
| 3360 then a message will be printed. If an explicit extension is passed to `load', | |
| 3361 no warning will be printed. | |
| 3362 */ ); | |
| 3363 load_warn_when_source_only = 0; | |
| 3364 | |
| 3365 DEFVAR_BOOL ("load-ignore-elc-files", &load_ignore_elc_files /* | |
| 3366 *Whether `load' should ignore `.elc' files when a suffix is not given. | |
| 3367 This is normally used only to bootstrap the `.elc' files when building XEmacs. | |
| 3368 */ ); | |
| 3369 load_ignore_elc_files = 0; | |
| 3370 | |
| 1123 | 3371 DEFVAR_BOOL ("load-ignore-out-of-date-elc-files", |
| 3372 &load_ignore_out_of_date_elc_files /* | |
| 3373 *Whether `load' should ignore out-of-date `.elc' files when no suffix is given. | |
| 3374 This is normally used when compiling packages of elisp files that may have | |
| 3375 complex dependencies. Ignoring all elc files with `load-ignore-elc-files' | |
| 3376 would also be safe, but much slower. | |
| 3377 */ ); | |
| 3378 load_ignore_out_of_date_elc_files = 0; | |
| 3379 | |
| 3380 DEFVAR_BOOL ("load-always-display-messages", | |
| 3381 &load_always_display_messages /* | |
| 3382 *Whether `load' should always display loading messages. | |
| 3383 If this is true, every file loaded will be shown, regardless of the setting | |
| 3384 of the NOMESSAGE parameter, and even when files are loaded indirectly, e.g. | |
| 2857 | 3385 due to `require'. |
| 1123 | 3386 */ ); |
| 3387 load_always_display_messages = 0; | |
| 3388 | |
| 3389 DEFVAR_BOOL ("load-show-full-path-in-messages", | |
| 3390 &load_show_full_path_in_messages /* | |
| 3391 *Whether `load' should show the full path in all loading messages. | |
| 3392 */ ); | |
| 3393 load_show_full_path_in_messages = 0; | |
| 3394 | |
| 428 | 3395 #ifdef LOADHIST |
| 3396 DEFVAR_LISP ("load-history", &Vload_history /* | |
| 3397 Alist mapping source file names to symbols and features. | |
| 3398 Each alist element is a list that starts with a file name, | |
| 3399 except for one element (optional) that starts with nil and describes | |
| 3400 definitions evaluated from buffers not visiting files. | |
| 3401 The remaining elements of each list are symbols defined as functions | |
| 3402 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'. | |
| 3403 */ ); | |
| 3404 Vload_history = Qnil; | |
| 3405 | |
| 3406 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list /* | |
| 3407 Used for internal purposes by `load'. | |
| 3408 */ ); | |
| 3409 Vcurrent_load_list = Qnil; | |
| 3410 #endif | |
| 3411 | |
| 3412 DEFVAR_LISP ("load-file-name", &Vload_file_name /* | |
| 3413 Full name of file being loaded by `load'. | |
| 3414 */ ); | |
| 3415 Vload_file_name = Qnil; | |
| 3416 | |
| 3417 DEFVAR_LISP ("load-read-function", &Vload_read_function /* | |
| 3418 Function used by `load' and `eval-region' for reading expressions. | |
| 3419 The default is nil, which means use the function `read'. | |
| 3420 */ ); | |
| 3421 Vload_read_function = Qnil; | |
| 3422 | |
| 3423 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings /* | |
| 3424 Non-nil means `load' should force-load all dynamic doc strings. | |
| 3425 This is useful when the file being loaded is a temporary copy. | |
| 3426 */ ); | |
| 3427 load_force_doc_strings = 0; | |
| 3428 | |
| 3429 /* See read_escape(). */ | |
| 3430 #if 0 | |
| 3431 /* Used to be named `puke-on-fsf-keys' */ | |
| 3432 DEFVAR_BOOL ("fail-on-bucky-bit-character-escapes", | |
| 3433 &fail_on_bucky_bit_character_escapes /* | |
| 3434 Whether `read' should signal an error when it encounters unsupported | |
| 3435 character escape syntaxes or just read them incorrectly. | |
| 3436 */ ); | |
| 3437 fail_on_bucky_bit_character_escapes = 0; | |
| 3438 #endif | |
| 3439 | |
| 3440 /* This must be initialized in init_lread otherwise it may start out | |
| 3441 with values saved when the image is dumped. */ | |
| 3442 staticpro (&Vload_descriptor_list); | |
| 3443 | |
| 3444 /* Initialized in init_lread. */ | |
| 3445 staticpro (&Vload_force_doc_string_list); | |
| 3446 | |
| 3447 Vload_file_name_internal = Qnil; | |
| 3448 staticpro (&Vload_file_name_internal); | |
| 3449 | |
| 3450 /* So that early-early stuff will work */ | |
| 1292 | 3451 Ffset (Qload, Qload_internal); |
| 428 | 3452 |
| 3453 #ifdef FEATUREP_SYNTAX | |
| 563 | 3454 DEFSYMBOL (Qfeaturep); |
| 771 | 3455 Fprovide (intern ("xemacs")); |
| 428 | 3456 #ifdef INFODOCK |
| 771 | 3457 Fprovide (intern ("infodock")); |
| 428 | 3458 #endif /* INFODOCK */ |
| 3459 #endif /* FEATUREP_SYNTAX */ | |
| 3460 | |
| 3461 #ifdef LISP_BACKQUOTES | |
| 3462 old_backquote_flag = new_backquote_flag = 0; | |
| 3463 #endif | |
| 3464 | |
| 3465 #ifdef I18N3 | |
| 3466 Vfile_domain = Qnil; | |
| 3467 #endif | |
| 3468 | |
| 3469 Vread_objects = Qnil; | |
| 3470 staticpro (&Vread_objects); | |
| 3471 | |
| 3472 Vlocate_file_hash_table = make_lisp_hash_table (200, | |
| 3473 HASH_TABLE_NON_WEAK, | |
| 3474 HASH_TABLE_EQUAL); | |
| 3475 staticpro (&Vlocate_file_hash_table); | |
| 3476 #ifdef DEBUG_XEMACS | |
| 3477 symbol_value (XSYMBOL (intern ("Vlocate-file-hash-table"))) | |
| 3478 = Vlocate_file_hash_table; | |
| 3479 #endif | |
| 3480 } |