Mercurial > hg > xemacs-beta
annotate src/lread.c @ 4471:2d39535e1f9d
Say explicitly that eq is useful for chars; xref number comparison, lispref
2008-05-27 Aidan Kehoe <kehoea@parhasard.net>
* lispref/objects.texi (Equality Predicates):
Cross reference to the section on comparison of numbers when
talking about using #'eq with integers; also mention that
#'eq gives t when passed identical integers, and that #'char= is
also available there.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 27 May 2008 11:58:42 +0200 |
| parents | ac6231e0c1df |
| children | 7869173584fc |
| 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. | |
| 1261 | 4 Copyright (C) 1996, 2001, 2002, 2003 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 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 152 Lisp_Object Vcurrent_compiled_function_annotation; | |
| 153 #endif | |
| 154 | |
| 155 static int load_byte_code_version; | |
| 156 | |
| 157 /* An array describing all known built-in structure types */ | |
| 158 static structure_type_dynarr *the_structure_type_dynarr; | |
| 159 | |
| 160 #if 0 /* FSF stuff */ | |
| 161 /* For use within read-from-string (this reader is non-reentrant!!) */ | |
| 162 static int read_from_string_index; | |
| 163 static int read_from_string_limit; | |
| 164 #endif | |
| 165 | |
| 166 #if 0 /* More FSF implementation kludges. */ | |
| 167 /* In order to implement load-force-doc-string, FSF saves the | |
| 168 #@-quoted string when it's seen, and goes back and retrieves | |
| 169 it later. | |
| 170 | |
| 171 This approach is not only kludgy, but it in general won't work | |
| 172 correctly because there's no stack of remembered #@-quoted-strings | |
| 173 and those strings don't generally appear in the file in the same | |
| 174 order as their #$ references. (Yes, that is amazingly stupid too. | |
| 175 | |
| 176 It would be trivially easy to always encode the #@ string | |
| 177 [which is a comment, anyway] in the middle of the (#$ . INT) cons | |
| 178 reference. That way, it would be really easy to implement | |
| 179 load-force-doc-string in a non-kludgy way by just retrieving the | |
| 180 string immediately, because it's delivered on a silver platter.) | |
| 181 | |
| 182 And finally, this stupid approach doesn't work under Mule, or | |
| 183 under MS-DOS or Windows NT, or under VMS, or any other place | |
| 184 where you either can't do an ftell() or don't get back a byte | |
| 185 count. | |
| 186 | |
| 187 Oh, and one more lossage in this approach: If you attempt to | |
| 188 dump any ELC files that were compiled with `byte-compile-dynamic' | |
| 189 (as opposed to just `byte-compile-dynamic-docstring'), you | |
| 190 get hosed. FMH! (as the illustrious JWZ was prone to utter) | |
| 191 | |
| 192 The approach we use is clean, solves all of these problems, and is | |
| 193 probably easier to implement anyway. We just save a list of all | |
| 194 the containing objects that have (#$ . INT) conses in them (this | |
| 195 will only be compiled-function objects and lists), and when the | |
| 196 file is finished loading, we go through and fill in all the | |
| 814 | 197 doc strings at once. --ben */ |
| 428 | 198 |
| 199 /* This contains the last string skipped with #@. */ | |
| 200 static char *saved_doc_string; | |
| 201 /* Length of buffer allocated in saved_doc_string. */ | |
| 202 static int saved_doc_string_size; | |
| 203 /* Length of actual data in saved_doc_string. */ | |
| 204 static int saved_doc_string_length; | |
| 205 /* This is the file position that string came from. */ | |
| 206 static int saved_doc_string_position; | |
| 207 #endif | |
| 208 | |
| 1123 | 209 static int locate_file_open_or_access_file (Ibyte *fn, int access_mode); |
| 428 | 210 EXFUN (Fread_from_string, 3); |
| 211 | |
| 212 /* When errors are signaled, the actual readcharfun should not be used | |
| 213 as an argument if it is an lstream, so that lstreams don't escape | |
| 214 to the Lisp level. */ | |
| 1261 | 215 #define READCHARFUN_MAYBE(x) (LSTREAMP (x) \ |
| 216 ? (build_msg_string ("internal input stream")) \ | |
| 428 | 217 : (x)) |
| 218 | |
| 219 | |
| 2268 | 220 static DECLARE_DOESNT_RETURN (read_syntax_error (const char *)); |
| 221 | |
| 428 | 222 static DOESNT_RETURN |
| 442 | 223 read_syntax_error (const char *string) |
| 428 | 224 { |
| 563 | 225 signal_error (Qinvalid_read_syntax, string, Qunbound); |
| 428 | 226 } |
| 227 | |
| 228 static Lisp_Object | |
| 442 | 229 continuable_read_syntax_error (const char *string) |
| 428 | 230 { |
| 563 | 231 return signal_continuable_error (Qinvalid_read_syntax, string, Qunbound); |
| 428 | 232 } |
| 233 | |
| 234 | |
| 235 /* Handle unreading and rereading of characters. */ | |
| 867 | 236 static Ichar |
| 428 | 237 readchar (Lisp_Object readcharfun) |
| 238 { | |
| 239 /* This function can GC */ | |
| 240 | |
| 241 if (BUFFERP (readcharfun)) | |
| 242 { | |
| 867 | 243 Ichar c; |
| 428 | 244 struct buffer *b = XBUFFER (readcharfun); |
| 245 | |
| 246 if (!BUFFER_LIVE_P (b)) | |
| 563 | 247 invalid_operation ("Reading from killed buffer", Qunbound); |
| 428 | 248 |
| 249 if (BUF_PT (b) >= BUF_ZV (b)) | |
| 250 return -1; | |
| 251 c = BUF_FETCH_CHAR (b, BUF_PT (b)); | |
| 252 BUF_SET_PT (b, BUF_PT (b) + 1); | |
| 253 | |
| 254 return c; | |
| 255 } | |
| 256 else if (LSTREAMP (readcharfun)) | |
| 257 { | |
| 867 | 258 Ichar c = Lstream_get_ichar (XLSTREAM (readcharfun)); |
| 428 | 259 #ifdef DEBUG_XEMACS /* testing Mule */ |
| 260 static int testing_mule = 0; /* Change via debugger */ | |
| 444 | 261 if (testing_mule) |
| 262 { | |
| 263 if (c >= 0x20 && c <= 0x7E) stderr_out ("%c", c); | |
| 264 else if (c == '\n') stderr_out ("\\n\n"); | |
| 265 else stderr_out ("\\%o ", c); | |
| 266 } | |
| 267 #endif /* testing Mule */ | |
| 428 | 268 return c; |
| 269 } | |
| 270 else if (MARKERP (readcharfun)) | |
| 271 { | |
| 867 | 272 Ichar c; |
| 665 | 273 Charbpos mpos = marker_position (readcharfun); |
| 428 | 274 struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
| 275 | |
| 276 if (mpos >= BUF_ZV (inbuffer)) | |
| 277 return -1; | |
| 278 c = BUF_FETCH_CHAR (inbuffer, mpos); | |
| 279 set_marker_position (readcharfun, mpos + 1); | |
| 280 return c; | |
| 281 } | |
| 282 else | |
| 283 { | |
| 284 Lisp_Object tem = call0 (readcharfun); | |
| 285 | |
| 286 if (!CHAR_OR_CHAR_INTP (tem)) | |
| 287 return -1; | |
| 288 return XCHAR_OR_CHAR_INT (tem); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
| 293 If the stream is a user function, call it with the char as argument. */ | |
| 294 | |
| 295 static void | |
| 867 | 296 unreadchar (Lisp_Object readcharfun, Ichar c) |
| 428 | 297 { |
| 298 if (c == -1) | |
| 299 /* Don't back up the pointer if we're unreading the end-of-input mark, | |
| 300 since readchar didn't advance it when we read it. */ | |
| 301 ; | |
| 302 else if (BUFFERP (readcharfun)) | |
| 303 BUF_SET_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
| 304 else if (LSTREAMP (readcharfun)) | |
| 305 { | |
| 867 | 306 Lstream_unget_ichar (XLSTREAM (readcharfun), c); |
| 428 | 307 #ifdef DEBUG_XEMACS /* testing Mule */ |
| 308 { | |
| 309 static int testing_mule = 0; /* Set this using debugger */ | |
| 310 if (testing_mule) | |
| 311 fprintf (stderr, | |
| 312 (c >= 0x20 && c <= 0x7E) ? "UU%c" : | |
| 313 ((c == '\n') ? "UU\\n\n" : "UU\\%o"), c); | |
| 314 } | |
| 315 #endif | |
| 316 } | |
| 317 else if (MARKERP (readcharfun)) | |
| 318 set_marker_position (readcharfun, marker_position (readcharfun) - 1); | |
| 319 else | |
| 320 call1 (readcharfun, make_char (c)); | |
| 321 } | |
| 322 | |
| 323 static Lisp_Object read0 (Lisp_Object readcharfun); | |
| 324 static Lisp_Object read1 (Lisp_Object readcharfun); | |
| 325 static Lisp_Object read_list (Lisp_Object readcharfun, | |
| 867 | 326 Ichar terminator, |
| 428 | 327 int allow_dotted_lists, |
| 328 int check_for_doc_references); | |
| 329 | |
| 330 static void readevalloop (Lisp_Object readcharfun, | |
| 331 Lisp_Object sourcefile, | |
| 332 Lisp_Object (*evalfun) (Lisp_Object), | |
| 333 int printflag); | |
| 334 | |
| 335 static Lisp_Object | |
| 336 load_unwind (Lisp_Object stream) /* used as unwind-protect function in load */ | |
| 337 { | |
| 338 Lstream_close (XLSTREAM (stream)); | |
| 339 return Qnil; | |
| 340 } | |
| 341 | |
| 2548 | 342 /* Check if NONRELOC/RELOC (an absolute filename) is suppressed according |
| 343 to load-suppress-alist. */ | |
| 344 static int | |
| 345 check_if_suppressed (Ibyte *nonreloc, Lisp_Object reloc) | |
| 346 { | |
| 347 Bytecount len; | |
| 348 | |
| 349 if (!NILP (reloc)) | |
| 350 { | |
| 351 nonreloc = XSTRING_DATA (reloc); | |
| 352 len = XSTRING_LENGTH (reloc); | |
| 353 } | |
| 354 else | |
| 355 len = qxestrlen (nonreloc); | |
| 356 | |
| 357 if (len >= 4 && !qxestrcmp_ascii (nonreloc + len - 4, ".elc")) | |
| 358 len -= 4; | |
| 359 else if (len >= 3 && !qxestrcmp_ascii (nonreloc + len - 3, ".el")) | |
| 360 len -= 3; | |
| 361 | |
| 2567 | 362 { |
| 363 EXTERNAL_LIST_LOOP_2 (acons, Vload_suppress_alist) | |
| 364 { | |
| 365 if (CONSP (acons) && STRINGP (XCAR (acons))) | |
| 366 { | |
| 367 Lisp_Object name = XCAR (acons); | |
| 368 if (XSTRING_LENGTH (name) == len && | |
| 369 !memcmp (XSTRING_DATA (name), nonreloc, len)) | |
| 370 { | |
| 371 struct gcpro gcpro1; | |
| 372 Lisp_Object val; | |
| 373 | |
| 374 GCPRO1 (reloc); | |
| 375 val = Feval (XCDR (acons)); | |
| 376 UNGCPRO; | |
| 377 | |
| 378 if (!NILP (val)) | |
| 379 return 1; | |
| 380 } | |
| 381 } | |
| 382 } | |
| 383 } | |
| 2548 | 384 |
| 385 return 0; | |
| 386 } | |
| 387 | |
| 428 | 388 /* The plague is coming. |
| 389 | |
| 390 Ring around the rosy, pocket full of posy, | |
| 391 Ashes ashes, they all fall down. | |
| 392 */ | |
| 393 void | |
| 394 ebolify_bytecode_constants (Lisp_Object vector) | |
| 395 { | |
| 396 int len = XVECTOR_LENGTH (vector); | |
| 397 int i; | |
| 398 | |
| 399 for (i = 0; i < len; i++) | |
| 400 { | |
| 401 Lisp_Object el = XVECTOR_DATA (vector)[i]; | |
| 402 | |
| 403 /* We don't check for `eq', `equal', and the others that have | |
| 404 bytecode opcodes. This might lose if someone passes #'eq or | |
| 405 something to `funcall', but who would really do that? As | |
| 406 they say in law, we've made a "good-faith effort" to | |
| 407 unfuckify ourselves. And doing it this way avoids screwing | |
| 408 up args to `make-hash-table' and such. As it is, we have to | |
| 409 add an extra Ebola check in decode_weak_list_type(). --ben */ | |
| 410 if (EQ (el, Qassoc)) el = Qold_assoc; | |
| 411 else if (EQ (el, Qdelq)) el = Qold_delq; | |
| 412 #if 0 | |
| 413 /* I think this is a bad idea because it will probably mess | |
| 414 with keymap code. */ | |
| 415 else if (EQ (el, Qdelete)) el = Qold_delete; | |
| 416 #endif | |
| 417 else if (EQ (el, Qrassq)) el = Qold_rassq; | |
| 418 else if (EQ (el, Qrassoc)) el = Qold_rassoc; | |
| 419 | |
| 420 XVECTOR_DATA (vector)[i] = el; | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 static Lisp_Object | |
| 558 | 425 pas_de_holgazan_ici (int fd, Lisp_Object victim) |
| 428 | 426 { |
| 427 Lisp_Object tem; | |
| 428 EMACS_INT pos; | |
| 429 | |
| 430 if (!INTP (XCDR (victim))) | |
| 563 | 431 invalid_byte_code ("Bogus doc string reference", victim); |
| 428 | 432 pos = XINT (XCDR (victim)); |
| 433 if (pos < 0) | |
| 434 pos = -pos; /* kludge to mark a user variable */ | |
| 814 | 435 tem = unparesseuxify_doc_string (fd, pos, 0, Vload_file_name_internal, 0); |
| 428 | 436 if (!STRINGP (tem)) |
| 563 | 437 signal_error_1 (Qinvalid_byte_code, tem); |
| 428 | 438 return tem; |
| 439 } | |
| 440 | |
| 441 static Lisp_Object | |
| 442 load_force_doc_string_unwind (Lisp_Object oldlist) | |
| 443 { | |
| 444 struct gcpro gcpro1; | |
| 445 Lisp_Object list = Vload_force_doc_string_list; | |
| 446 Lisp_Object tail; | |
| 447 int fd = XINT (XCAR (Vload_descriptor_list)); | |
| 448 | |
| 449 GCPRO1 (list); | |
| 450 /* restore the old value first just in case an error occurs. */ | |
| 451 Vload_force_doc_string_list = oldlist; | |
| 452 | |
| 453 LIST_LOOP (tail, list) | |
| 454 { | |
| 455 Lisp_Object john = Fcar (tail); | |
| 456 if (CONSP (john)) | |
| 457 { | |
| 458 assert (CONSP (XCAR (john))); | |
| 459 assert (!purify_flag); /* should have been handled in read_list() */ | |
| 558 | 460 XCAR (john) = pas_de_holgazan_ici (fd, XCAR (john)); |
| 428 | 461 } |
| 462 else | |
| 463 { | |
| 464 Lisp_Object doc; | |
| 465 | |
| 466 assert (COMPILED_FUNCTIONP (john)); | |
| 467 if (CONSP (XCOMPILED_FUNCTION (john)->instructions)) | |
| 468 { | |
| 469 struct gcpro ngcpro1; | |
| 558 | 470 Lisp_Object juan = (pas_de_holgazan_ici |
| 814 | 471 (fd, |
| 472 XCOMPILED_FUNCTION (john)->instructions)); | |
| 428 | 473 Lisp_Object ivan; |
| 474 | |
| 475 NGCPRO1 (juan); | |
| 476 ivan = Fread (juan); | |
| 477 if (!CONSP (ivan)) | |
| 563 | 478 invalid_byte_code ("invalid lazy-loaded byte code", ivan); |
| 428 | 479 XCOMPILED_FUNCTION (john)->instructions = XCAR (ivan); |
| 480 /* v18 or v19 bytecode file. Need to Ebolify. */ | |
| 481 if (XCOMPILED_FUNCTION (john)->flags.ebolified | |
| 482 && VECTORP (XCDR (ivan))) | |
| 483 ebolify_bytecode_constants (XCDR (ivan)); | |
| 484 XCOMPILED_FUNCTION (john)->constants = XCDR (ivan); | |
| 485 NUNGCPRO; | |
| 486 } | |
| 487 doc = compiled_function_documentation (XCOMPILED_FUNCTION (john)); | |
| 488 if (CONSP (doc)) | |
| 489 { | |
| 490 assert (!purify_flag); /* should have been handled in | |
| 491 read_compiled_function() */ | |
| 558 | 492 doc = pas_de_holgazan_ici (fd, doc); |
| 428 | 493 set_compiled_function_documentation (XCOMPILED_FUNCTION (john), |
| 494 doc); | |
| 495 } | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 if (!NILP (list)) | |
| 500 free_list (list); | |
| 501 | |
| 502 UNGCPRO; | |
| 503 return Qnil; | |
| 504 } | |
| 505 | |
| 506 /* Close all descriptors in use for Fload_internal. | |
| 507 This is used when starting a subprocess. */ | |
| 508 | |
| 509 void | |
| 510 close_load_descs (void) | |
| 511 { | |
| 512 Lisp_Object tail; | |
| 513 LIST_LOOP (tail, Vload_descriptor_list) | |
| 771 | 514 retry_close (XINT (XCAR (tail))); |
| 428 | 515 } |
| 516 | |
| 517 #ifdef I18N3 | |
| 518 Lisp_Object Vfile_domain; | |
| 519 #endif /* I18N3 */ | |
| 520 | |
| 521 DEFUN ("load-internal", Fload_internal, 1, 6, 0, /* | |
| 522 Execute a file of Lisp code named FILE; no coding-system frobbing. | |
| 523 This function is identical to `load' except for the handling of the | |
| 524 CODESYS and USED-CODESYS arguments under XEmacs/Mule. (When Mule | |
| 525 support is not present, both functions are identical and ignore the | |
| 526 CODESYS and USED-CODESYS arguments.) | |
| 527 | |
| 528 If support for Mule exists in this Emacs, the file is decoded | |
| 529 according to CODESYS; if omitted, no conversion happens. If | |
| 530 USED-CODESYS is non-nil, it should be a symbol, and the actual coding | |
| 531 system that was used for the decoding is stored into it. It will in | |
| 532 general be different from CODESYS if CODESYS specifies automatic | |
| 533 encoding detection or end-of-line detection. | |
| 534 */ | |
| 444 | 535 (file, noerror, nomessage, nosuffix, codesys, used_codesys)) |
| 428 | 536 { |
| 537 /* This function can GC */ | |
| 538 int fd = -1; | |
| 539 int speccount = specpdl_depth (); | |
| 540 int source_only = 0; | |
| 1123 | 541 /* NEWER and OLDER are filenames w/o directory, used in loading messages |
| 542 to e.g. warn of newer .el files when the .elc is being loaded. */ | |
| 428 | 543 Lisp_Object newer = Qnil; |
| 1123 | 544 Lisp_Object older = Qnil; |
| 428 | 545 Lisp_Object handler = Qnil; |
| 546 Lisp_Object found = Qnil; | |
| 1292 | 547 Lisp_Object retval; |
| 1123 | 548 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 428 | 549 int reading_elc = 0; |
| 780 | 550 int from_require = EQ (nomessage, Qrequire); |
| 1261 | 551 int message_p = NILP (nomessage) || load_always_display_messages; |
| 428 | 552 struct stat s1, s2; |
| 1261 | 553 Ibyte *spaces = alloca_ibytes (load_in_progress * 2 + 10); |
| 554 int i; | |
| 1292 | 555 PROFILE_DECLARE (); |
| 428 | 556 |
| 1266 | 557 GCPRO4 (file, newer, older, found); |
| 428 | 558 CHECK_STRING (file); |
| 559 | |
| 1292 | 560 PROFILE_RECORD_ENTERING_SECTION (Qload_internal); |
| 561 | |
| 428 | 562 /* If file name is magic, call the handler. */ |
| 563 handler = Ffind_file_name_handler (file, Qload); | |
| 564 if (!NILP (handler)) | |
| 1292 | 565 { |
| 566 retval = call5 (handler, Qload, file, noerror, nomessage, nosuffix); | |
| 567 goto done; | |
| 568 } | |
| 428 | 569 |
| 570 /* Do this after the handler to avoid | |
| 571 the need to gcpro noerror, nomessage and nosuffix. | |
| 572 (Below here, we care only whether they are nil or not.) */ | |
| 573 file = Fsubstitute_in_file_name (file); | |
| 574 if (!NILP (used_codesys)) | |
| 575 CHECK_SYMBOL (used_codesys); | |
| 576 | |
| 1261 | 577 if (noninteractive) |
| 578 { | |
| 579 for (i = 0; i < load_in_progress * 2; i++) | |
| 580 spaces[i] = ' '; | |
| 581 spaces[i] = '\0'; | |
| 582 } | |
| 583 else | |
| 584 spaces[0] = '\0'; | |
| 585 | |
| 428 | 586 /* Avoid weird lossage with null string as arg, |
| 587 since it would try to load a directory as a Lisp file. | |
| 588 Unix truly sucks. */ | |
| 589 if (XSTRING_LENGTH (file) > 0) | |
| 590 { | |
| 867 | 591 Ibyte *foundstr; |
| 428 | 592 int foundlen; |
| 593 | |
| 594 fd = locate_file (Vload_path, file, | |
| 595 ((!NILP (nosuffix)) ? Qnil : | |
| 596 build_string (load_ignore_elc_files ? ".el:" : | |
| 597 ".elc:.el:")), | |
| 598 &found, | |
| 599 -1); | |
| 600 | |
| 601 if (fd < 0) | |
| 602 { | |
| 444 | 603 if (NILP (noerror)) |
| 563 | 604 signal_error (Qfile_error, "Cannot open load file", file); |
| 428 | 605 else |
| 606 { | |
| 1292 | 607 retval = Qnil; |
| 608 goto done; | |
| 428 | 609 } |
| 610 } | |
| 611 | |
| 2367 | 612 foundstr = alloca_ibytes (XSTRING_LENGTH (found) + 1); |
| 771 | 613 qxestrcpy (foundstr, XSTRING_DATA (found)); |
| 614 foundlen = qxestrlen (foundstr); | |
| 428 | 615 |
| 616 /* The omniscient JWZ thinks this is worthless, but I beg to | |
| 617 differ. --ben */ | |
| 618 if (load_ignore_elc_files) | |
| 1123 | 619 newer = Ffile_name_nondirectory (found); |
| 620 else if ((load_warn_when_source_newer || | |
| 621 load_ignore_out_of_date_elc_files) && | |
| 428 | 622 !memcmp (".elc", foundstr + foundlen - 4, 4)) |
| 623 { | |
| 771 | 624 if (! qxe_fstat (fd, &s1)) /* can't fail, right? */ |
| 428 | 625 { |
| 626 int result; | |
| 627 /* temporarily hack the 'c' off the end of the filename */ | |
| 628 foundstr[foundlen - 1] = '\0'; | |
| 771 | 629 result = qxe_stat (foundstr, &s2); |
| 428 | 630 if (result >= 0 && |
| 631 (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) | |
| 1123 | 632 { |
| 633 /* .elc exists and is out-of-date wrt .el */ | |
| 634 Lisp_Object el_name = make_string (foundstr, foundlen - 1); | |
| 635 struct gcpro nngcpro1; | |
| 636 NNGCPRO1 (el_name); | |
| 637 newer = Ffile_name_nondirectory (el_name); | |
| 638 if (load_ignore_out_of_date_elc_files) | |
| 639 { | |
| 640 int newfd = | |
| 641 locate_file_open_or_access_file | |
| 642 (XSTRING_DATA (el_name), -1); | |
| 643 | |
| 644 if (newfd >= 0) | |
| 645 { | |
| 646 older = Ffile_name_nondirectory (found); | |
| 647 found = el_name; | |
| 648 retry_close (fd); | |
| 649 fd = newfd; | |
| 650 } | |
| 651 } | |
| 652 NNUNGCPRO; | |
| 653 } | |
| 428 | 654 /* put the 'c' back on (kludge-o-rama) */ |
| 655 foundstr[foundlen - 1] = 'c'; | |
| 656 } | |
| 657 } | |
| 658 else if (load_warn_when_source_only && | |
| 659 /* `found' ends in ".el" */ | |
| 660 !memcmp (".el", foundstr + foundlen - 3, 3) && | |
| 661 /* `file' does not end in ".el" */ | |
| 662 memcmp (".el", | |
| 663 XSTRING_DATA (file) + XSTRING_LENGTH (file) - 3, | |
| 664 3)) | |
| 1123 | 665 source_only = 1; |
| 428 | 666 |
| 667 if (!memcmp (".elc", foundstr + foundlen - 4, 4)) | |
| 668 reading_elc = 1; | |
| 669 } | |
| 670 | |
| 1123 | 671 #define PRINT_LOADING_MESSAGE_1(loading, done) \ |
| 672 do { \ | |
| 673 if (load_ignore_elc_files) \ | |
| 674 { \ | |
| 675 if (message_p) \ | |
| 1261 | 676 message (loading done, spaces, \ |
| 1123 | 677 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 678 found : newer)); \ | |
| 679 } \ | |
| 680 else if (!NILP (older)) \ | |
| 681 { \ | |
| 682 assert (load_ignore_out_of_date_elc_files); \ | |
| 1261 | 683 message (loading done " (file %s is out-of-date)", spaces, \ |
| 1123 | 684 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 685 found : newer), \ | |
| 686 XSTRING_DATA (older)); \ | |
| 687 } \ | |
| 688 else if (!NILP (newer)) \ | |
| 1261 | 689 message (loading done " (file %s is newer)", spaces, \ |
| 1123 | 690 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 691 found : file), \ | |
| 692 XSTRING_DATA (newer)); \ | |
| 693 else if (source_only) \ | |
| 1261 | 694 message (loading done " (file %s.elc does not exist)", spaces, \ |
| 1123 | 695 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 696 found : file), \ | |
| 697 XSTRING_DATA (Ffile_name_nondirectory (file))); \ | |
| 698 else if (message_p) \ | |
| 1261 | 699 message (loading done, spaces, \ |
| 1123 | 700 XSTRING_DATA (load_show_full_path_in_messages ? \ |
| 701 found : file)); \ | |
| 428 | 702 } while (0) |
| 703 | |
| 1261 | 704 #define PRINT_LOADING_MESSAGE(done) \ |
| 705 do { \ | |
| 706 if (from_require) \ | |
| 707 PRINT_LOADING_MESSAGE_1 ("%sRequiring %s...", done); \ | |
| 708 else \ | |
| 709 PRINT_LOADING_MESSAGE_1 ("%sLoading %s...", done); \ | |
| 780 | 710 } while (0) |
| 711 | |
| 428 | 712 PRINT_LOADING_MESSAGE (""); |
| 713 | |
| 714 { | |
| 715 /* Lisp_Object's must be malloc'ed, not stack-allocated */ | |
| 716 Lisp_Object lispstream = Qnil; | |
| 442 | 717 const int block_size = 8192; |
| 428 | 718 struct gcpro ngcpro1; |
| 719 | |
| 720 NGCPRO1 (lispstream); | |
| 721 lispstream = make_filedesc_input_stream (fd, 0, -1, LSTR_CLOSING); | |
| 722 /* 64K is used for normal files; 8K should be OK here because Lisp | |
| 723 files aren't really all that big. */ | |
| 724 Lstream_set_buffering (XLSTREAM (lispstream), LSTREAM_BLOCKN_BUFFERED, | |
| 725 block_size); | |
| 771 | 726 lispstream = make_coding_input_stream |
| 727 (XLSTREAM (lispstream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 728 CODING_DECODE, 0); |
| 428 | 729 Lstream_set_buffering (XLSTREAM (lispstream), LSTREAM_BLOCKN_BUFFERED, |
| 730 block_size); | |
| 731 /* NOTE: Order of these is very important. Don't rearrange them. */ | |
| 853 | 732 internal_bind_int (&load_in_progress, 1 + load_in_progress); |
| 428 | 733 record_unwind_protect (load_unwind, lispstream); |
| 853 | 734 internal_bind_lisp_object (&Vload_descriptor_list, |
| 735 Fcons (make_int (fd), Vload_descriptor_list)); | |
| 736 internal_bind_lisp_object (&Vload_file_name_internal, found); | |
| 737 /* this is not a simple internal_bind. */ | |
| 428 | 738 record_unwind_protect (load_force_doc_string_unwind, |
| 739 Vload_force_doc_string_list); | |
| 853 | 740 Vload_force_doc_string_list = Qnil; |
| 2548 | 741 internal_bind_lisp_object (&Vload_file_name, found); |
| 428 | 742 #ifdef I18N3 |
| 853 | 743 /* set it to nil; a call to #'domain will set it. */ |
| 744 internal_bind_lisp_object (&Vfile_domain, Qnil); | |
| 428 | 745 #endif |
| 746 | |
|
4448
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747 /* Is there a #!? If so, read it, and unread ;!. |
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748 |
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749 GNU implement this by treating any #! anywhere in the source text as |
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750 commenting out the whole line. */ |
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751 { |
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752 char shebangp[2]; |
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753 int num_read; |
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754 |
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755 num_read = Lstream_read (XLSTREAM (lispstream), shebangp, |
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756 sizeof(shebangp)); |
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757 if (sizeof(shebangp) == num_read |
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758 && 0 == strncmp("#!", shebangp, sizeof(shebangp))) |
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759 { |
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760 shebangp[0] = ';'; |
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761 } |
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762 |
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763 Lstream_unread (XLSTREAM (lispstream), shebangp, num_read); |
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764 } |
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765 |
| 428 | 766 /* Now determine what sort of ELC file we're reading in. */ |
| 853 | 767 internal_bind_int (&load_byte_code_version, load_byte_code_version); |
| 428 | 768 if (reading_elc) |
| 769 { | |
| 770 char elc_header[8]; | |
| 771 int num_read; | |
| 772 | |
| 773 num_read = Lstream_read (XLSTREAM (lispstream), elc_header, 8); | |
| 774 if (num_read < 8 | |
| 775 || strncmp (elc_header, ";ELC", 4)) | |
| 776 { | |
| 777 /* Huh? Probably not a valid ELC file. */ | |
| 778 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 779 Lstream_unread (XLSTREAM (lispstream), elc_header, num_read); | |
| 780 } | |
| 781 else | |
| 782 load_byte_code_version = elc_header[4]; | |
| 783 } | |
| 784 else | |
| 785 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 786 | |
| 787 readevalloop (lispstream, file, Feval, 0); | |
| 788 if (!NILP (used_codesys)) | |
| 789 Fset (used_codesys, | |
| 790 XCODING_SYSTEM_NAME | |
| 771 | 791 (coding_stream_detected_coding_system (XLSTREAM (lispstream)))); |
| 792 unbind_to (speccount); | |
| 428 | 793 |
| 794 NUNGCPRO; | |
| 795 } | |
| 796 | |
| 797 { | |
| 798 Lisp_Object tem; | |
| 799 /* #### Disgusting kludge */ | |
| 800 /* Run any load-hooks for this file. */ | |
| 801 /* #### An even more disgusting kludge. There is horrible code */ | |
| 802 /* that is relying on the fact that dumped lisp files are found */ | |
| 803 /* via `load-path' search. */ | |
| 804 Lisp_Object name = file; | |
| 805 | |
| 1123 | 806 if (!NILP (Ffile_name_absolute_p (file))) |
| 807 name = Ffile_name_nondirectory (file); | |
| 428 | 808 |
| 1261 | 809 tem = Fassoc (name, Vafter_load_alist); |
| 428 | 810 if (!NILP (tem)) |
| 811 { | |
| 812 struct gcpro ngcpro1; | |
| 813 | |
| 814 NGCPRO1 (tem); | |
| 815 /* Use eval so that errors give a semi-meaningful backtrace. --Stig */ | |
| 816 tem = Fcons (Qprogn, Fcdr (tem)); | |
| 817 Feval (tem); | |
| 818 NUNGCPRO; | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 if (!noninteractive) | |
| 823 PRINT_LOADING_MESSAGE ("done"); | |
| 824 | |
| 1292 | 825 retval = Qt; |
| 826 done: | |
| 827 PROFILE_RECORD_EXITING_SECTION (Qload_internal); | |
| 428 | 828 UNGCPRO; |
| 1292 | 829 return retval; |
| 428 | 830 } |
| 831 | |
| 832 | |
| 833 /* ------------------------------- */ | |
| 834 /* locate_file */ | |
| 835 /* ------------------------------- */ | |
| 836 | |
| 837 static int | |
| 838 decode_mode_1 (Lisp_Object mode) | |
| 839 { | |
| 840 if (EQ (mode, Qexists)) | |
| 841 return F_OK; | |
| 842 else if (EQ (mode, Qexecutable)) | |
| 843 return X_OK; | |
| 844 else if (EQ (mode, Qwritable)) | |
| 845 return W_OK; | |
| 846 else if (EQ (mode, Qreadable)) | |
| 847 return R_OK; | |
| 848 else if (INTP (mode)) | |
| 849 { | |
| 850 check_int_range (XINT (mode), 0, 7); | |
| 851 return XINT (mode); | |
| 852 } | |
| 853 else | |
| 563 | 854 invalid_argument ("Invalid value", mode); |
| 428 | 855 return 0; /* unreached */ |
| 856 } | |
| 857 | |
| 858 static int | |
| 859 decode_mode (Lisp_Object mode) | |
| 860 { | |
| 861 if (NILP (mode)) | |
| 862 return R_OK; | |
| 863 else if (CONSP (mode)) | |
| 864 { | |
| 865 int mask = 0; | |
| 2367 | 866 EXTERNAL_LIST_LOOP_2 (elt, mode) |
| 867 mask |= decode_mode_1 (elt); | |
| 428 | 868 return mask; |
| 869 } | |
| 870 else | |
| 871 return decode_mode_1 (mode); | |
| 872 } | |
| 873 | |
| 874 DEFUN ("locate-file", Flocate_file, 2, 4, 0, /* | |
| 875 Search for FILENAME through PATH-LIST. | |
| 876 | |
| 877 If SUFFIXES is non-nil, it should be a list of suffixes to append to | |
| 878 file name when searching. | |
| 879 | |
| 880 If MODE is non-nil, it should be a symbol or a list of symbol representing | |
| 881 requirements. Allowed symbols are `exists', `executable', `writable', and | |
| 882 `readable'. If MODE is nil, it defaults to `readable'. | |
| 883 | |
| 2548 | 884 Filenames are checked against `load-suppress-alist' to determine if they |
| 885 should be ignored. | |
| 886 | |
| 428 | 887 `locate-file' keeps hash tables of the directories it searches through, |
| 888 in order to speed things up. It tries valiantly to not get confused in | |
| 889 the face of a changing and unpredictable environment, but can occasionally | |
| 890 get tripped up. In this case, you will have to call | |
| 891 `locate-file-clear-hashing' to get it back on track. See that function | |
| 892 for details. | |
| 893 */ | |
| 894 (filename, path_list, suffixes, mode)) | |
| 895 { | |
| 896 /* This function can GC */ | |
| 897 Lisp_Object tp; | |
| 898 | |
| 899 CHECK_STRING (filename); | |
| 900 | |
| 901 if (LISTP (suffixes)) | |
| 902 { | |
| 2367 | 903 EXTERNAL_LIST_LOOP_2 (elt, suffixes) |
| 904 CHECK_STRING (elt); | |
| 428 | 905 } |
| 906 else | |
| 907 CHECK_STRING (suffixes); | |
| 908 | |
| 909 locate_file (path_list, filename, suffixes, &tp, decode_mode (mode)); | |
| 910 return tp; | |
| 911 } | |
| 912 | |
| 913 /* Recalculate the hash table for the given string. DIRECTORY should | |
| 914 better have been through Fexpand_file_name() by now. */ | |
| 915 | |
| 916 static Lisp_Object | |
| 917 locate_file_refresh_hashing (Lisp_Object directory) | |
| 918 { | |
| 919 Lisp_Object hash = | |
| 771 | 920 make_directory_hash_table (XSTRING_DATA (directory)); |
| 428 | 921 |
| 922 if (!NILP (hash)) | |
| 923 Fputhash (directory, hash, Vlocate_file_hash_table); | |
| 924 return hash; | |
| 925 } | |
| 926 | |
| 927 /* find the hash table for the given directory, recalculating if necessary */ | |
| 928 | |
| 929 static Lisp_Object | |
| 930 locate_file_find_directory_hash_table (Lisp_Object directory) | |
| 931 { | |
| 932 Lisp_Object hash = Fgethash (directory, Vlocate_file_hash_table, Qnil); | |
| 933 if (NILP (hash)) | |
| 934 return locate_file_refresh_hashing (directory); | |
| 935 else | |
| 936 return hash; | |
| 937 } | |
| 938 | |
| 939 /* The SUFFIXES argument in any of the locate_file* functions can be | |
| 940 nil, a list, or a string (for backward compatibility), with the | |
| 941 following semantics: | |
| 942 | |
| 943 a) nil - no suffix, just search for file name intact | |
| 944 (semantically different from "empty suffix list", which | |
| 945 would be meaningless.) | |
| 946 b) list - list of suffixes to append to file name. Each of these | |
| 947 must be a string. | |
| 948 c) string - colon-separated suffixes to append to file name (backward | |
| 949 compatibility). | |
| 950 | |
| 951 All of this got hairy, so I decided to use a mapper. Calling a | |
| 952 function for each suffix shouldn't slow things down, since | |
| 953 locate_file is rarely called with enough suffixes for funcalls to | |
| 954 make any difference. */ | |
| 955 | |
| 956 /* Map FUN over SUFFIXES, as described above. FUN will be called with a | |
| 957 char * containing the current file name, and ARG. Mapping stops when | |
| 958 FUN returns non-zero. */ | |
| 959 static void | |
| 960 locate_file_map_suffixes (Lisp_Object filename, Lisp_Object suffixes, | |
| 867 | 961 int (*fun) (Ibyte *, void *), |
| 428 | 962 void *arg) |
| 963 { | |
| 964 /* This function can GC */ | |
| 867 | 965 Ibyte *fn; |
| 428 | 966 int fn_len, max; |
| 967 | |
| 968 /* Calculate maximum size of any filename made from | |
| 969 this path element/specified file name and any possible suffix. */ | |
| 970 if (CONSP (suffixes)) | |
| 971 { | |
| 972 /* We must traverse the list, so why not do it right. */ | |
| 973 Lisp_Object tail; | |
| 974 max = 0; | |
| 975 LIST_LOOP (tail, suffixes) | |
| 976 { | |
| 977 if (XSTRING_LENGTH (XCAR (tail)) > max) | |
| 978 max = XSTRING_LENGTH (XCAR (tail)); | |
| 979 } | |
| 980 } | |
| 981 else if (NILP (suffixes)) | |
| 982 max = 0; | |
| 983 else | |
| 984 /* Just take the easy way out */ | |
| 985 max = XSTRING_LENGTH (suffixes); | |
| 986 | |
| 987 fn_len = XSTRING_LENGTH (filename); | |
| 2367 | 988 fn = alloca_ibytes (max + fn_len + 1); |
| 771 | 989 memcpy (fn, XSTRING_DATA (filename), fn_len); |
| 428 | 990 |
| 991 /* Loop over suffixes. */ | |
| 992 if (!STRINGP (suffixes)) | |
| 993 { | |
| 994 if (NILP (suffixes)) | |
| 995 { | |
| 996 /* Case a) discussed in the comment above. */ | |
| 997 fn[fn_len] = 0; | |
| 998 if ((*fun) (fn, arg)) | |
| 999 return; | |
| 1000 } | |
| 1001 else | |
| 1002 { | |
| 1003 /* Case b) */ | |
| 1004 Lisp_Object tail; | |
| 1005 LIST_LOOP (tail, suffixes) | |
| 1006 { | |
| 1007 memcpy (fn + fn_len, XSTRING_DATA (XCAR (tail)), | |
| 1008 XSTRING_LENGTH (XCAR (tail))); | |
| 1009 fn[fn_len + XSTRING_LENGTH (XCAR (tail))] = 0; | |
| 1010 if ((*fun) (fn, arg)) | |
| 1011 return; | |
| 1012 } | |
| 1013 } | |
| 1014 } | |
| 1015 else | |
| 1016 { | |
| 1017 /* Case c) */ | |
| 867 | 1018 const Ibyte *nsuffix = XSTRING_DATA (suffixes); |
| 428 | 1019 |
| 1020 while (1) | |
| 1021 { | |
| 867 | 1022 Ibyte *esuffix = qxestrchr (nsuffix, ':'); |
| 771 | 1023 Bytecount lsuffix = esuffix ? esuffix - nsuffix : |
| 1024 qxestrlen (nsuffix); | |
| 428 | 1025 |
| 1026 /* Concatenate path element/specified name with the suffix. */ | |
| 771 | 1027 qxestrncpy (fn + fn_len, nsuffix, lsuffix); |
| 428 | 1028 fn[fn_len + lsuffix] = 0; |
| 1029 | |
| 1030 if ((*fun) (fn, arg)) | |
| 1031 return; | |
| 1032 | |
| 1033 /* Advance to next suffix. */ | |
| 1034 if (esuffix == 0) | |
| 1035 break; | |
| 1036 nsuffix += lsuffix + 1; | |
| 1037 } | |
| 1038 } | |
| 1039 } | |
| 1040 | |
| 771 | 1041 struct locate_file_in_directory_mapper_closure |
| 1042 { | |
| 428 | 1043 int fd; |
| 1044 Lisp_Object *storeptr; | |
| 1045 int mode; | |
| 1046 }; | |
| 1047 | |
| 1123 | 1048 /* open() or access() a file to be returned by locate_file(). if |
| 1049 ACCESS_MODE >= 0, do an access() with that mode, else open(). Does | |
| 1050 various magic, e.g. opening the file read-only and binary and setting | |
| 1051 the close-on-exec flag on the file. */ | |
| 1052 | |
| 1053 static int | |
| 1054 locate_file_open_or_access_file (Ibyte *fn, int access_mode) | |
| 1055 { | |
| 1056 int val; | |
| 1057 | |
| 1058 /* Check that we can access or open it. */ | |
| 1059 if (access_mode >= 0) | |
| 1060 val = qxe_access (fn, access_mode); | |
| 1061 else | |
| 1062 { | |
| 1063 val = qxe_open (fn, O_RDONLY | OPEN_BINARY, 0); | |
| 1064 | |
| 1065 #ifndef WIN32_NATIVE | |
| 1066 if (val >= 0) | |
| 1067 /* If we actually opened the file, set close-on-exec flag | |
| 1068 on the new descriptor so that subprocesses can't whack | |
| 1069 at it. */ | |
| 1070 (void) fcntl (val, F_SETFD, FD_CLOEXEC); | |
| 1071 #endif | |
| 1072 } | |
| 1073 | |
| 1074 return val; | |
| 1075 } | |
| 1076 | |
| 428 | 1077 static int |
| 867 | 1078 locate_file_in_directory_mapper (Ibyte *fn, void *arg) |
| 428 | 1079 { |
| 1080 struct locate_file_in_directory_mapper_closure *closure = | |
| 771 | 1081 (struct locate_file_in_directory_mapper_closure *) arg; |
| 428 | 1082 struct stat st; |
| 1083 | |
| 1084 /* Ignore file if it's a directory. */ | |
| 771 | 1085 if (qxe_stat (fn, &st) >= 0 |
| 428 | 1086 && (st.st_mode & S_IFMT) != S_IFDIR) |
| 1087 { | |
| 1088 /* Check that we can access or open it. */ | |
| 1123 | 1089 closure->fd = locate_file_open_or_access_file (fn, closure->mode); |
| 428 | 1090 |
| 1091 if (closure->fd >= 0) | |
| 1092 { | |
| 2548 | 1093 if (!check_if_suppressed (fn, Qnil)) |
| 1094 { | |
| 1095 /* We succeeded; return this descriptor and filename. */ | |
| 1096 if (closure->storeptr) | |
| 1097 *closure->storeptr = build_intstring (fn); | |
| 1098 | |
| 1099 return 1; | |
| 1100 } | |
| 428 | 1101 } |
| 1102 } | |
| 1103 /* Keep mapping. */ | |
| 1104 return 0; | |
| 1105 } | |
| 1106 | |
| 1107 | |
| 1108 /* look for STR in PATH, optionally adding SUFFIXES. DIRECTORY need | |
| 1109 not have been expanded. */ | |
| 1110 | |
| 1111 static int | |
| 1112 locate_file_in_directory (Lisp_Object directory, Lisp_Object str, | |
| 1113 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1114 int mode) | |
| 1115 { | |
| 1116 /* This function can GC */ | |
| 1117 struct locate_file_in_directory_mapper_closure closure; | |
| 1118 Lisp_Object filename = Qnil; | |
| 1119 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 1120 | |
| 1121 GCPRO3 (directory, str, filename); | |
| 1122 | |
| 1123 filename = Fexpand_file_name (str, directory); | |
| 1124 if (NILP (filename) || NILP (Ffile_name_absolute_p (filename))) | |
| 1125 /* If there are non-absolute elts in PATH (eg ".") */ | |
| 1126 /* Of course, this could conceivably lose if luser sets | |
| 1127 default-directory to be something non-absolute ... */ | |
| 1128 { | |
| 1129 if (NILP (filename)) | |
| 1130 /* NIL means current directory */ | |
| 1131 filename = current_buffer->directory; | |
| 1132 else | |
| 1133 filename = Fexpand_file_name (filename, | |
| 1134 current_buffer->directory); | |
| 1135 if (NILP (Ffile_name_absolute_p (filename))) | |
| 1136 { | |
| 1137 /* Give up on this directory! */ | |
| 1138 UNGCPRO; | |
| 1139 return -1; | |
| 1140 } | |
| 1141 } | |
| 1142 | |
| 1143 closure.fd = -1; | |
| 1144 closure.storeptr = storeptr; | |
| 1145 closure.mode = mode; | |
| 1146 | |
| 771 | 1147 locate_file_map_suffixes (filename, suffixes, |
| 1148 locate_file_in_directory_mapper, | |
| 428 | 1149 &closure); |
| 1150 | |
| 1151 UNGCPRO; | |
| 1152 return closure.fd; | |
| 1153 } | |
| 1154 | |
| 1155 /* do the same as locate_file() but don't use any hash tables. */ | |
| 1156 | |
| 1157 static int | |
| 1158 locate_file_without_hash (Lisp_Object path, Lisp_Object str, | |
| 1159 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1160 int mode) | |
| 1161 { | |
| 1162 /* This function can GC */ | |
| 1163 int absolute = !NILP (Ffile_name_absolute_p (str)); | |
| 1164 | |
| 2367 | 1165 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1166 { |
| 2367 | 1167 int val = locate_file_in_directory (elt, str, suffixes, storeptr, |
| 428 | 1168 mode); |
| 1169 if (val >= 0) | |
| 1170 return val; | |
| 1171 if (absolute) | |
| 1172 break; | |
| 1173 } | |
| 1174 return -1; | |
| 1175 } | |
| 1176 | |
| 1177 static int | |
| 867 | 1178 locate_file_construct_suffixed_files_mapper (Ibyte *fn, void *arg) |
| 428 | 1179 { |
| 771 | 1180 Lisp_Object *tail = (Lisp_Object *) arg; |
| 1181 *tail = Fcons (build_intstring (fn), *tail); | |
| 428 | 1182 return 0; |
| 1183 } | |
| 1184 | |
| 1185 /* Construct a list of all files to search for. | |
| 1186 It makes sense to have this despite locate_file_map_suffixes() | |
| 1187 because we need Lisp strings to access the hash-table, and it would | |
| 1188 be inefficient to create them on the fly, again and again for each | |
| 1189 path component. See locate_file(). */ | |
| 1190 | |
| 1191 static Lisp_Object | |
| 1192 locate_file_construct_suffixed_files (Lisp_Object filename, | |
| 1193 Lisp_Object suffixes) | |
| 1194 { | |
| 1195 Lisp_Object tail = Qnil; | |
| 1196 struct gcpro gcpro1; | |
| 1197 GCPRO1 (tail); | |
| 1198 | |
| 1199 locate_file_map_suffixes (filename, suffixes, | |
| 1200 locate_file_construct_suffixed_files_mapper, | |
| 1201 &tail); | |
| 1202 | |
| 1203 UNGCPRO; | |
| 1204 return Fnreverse (tail); | |
| 1205 } | |
| 1206 | |
| 1207 DEFUN ("locate-file-clear-hashing", Flocate_file_clear_hashing, 1, 1, 0, /* | |
| 1208 Clear the hash records for the specified list of directories. | |
| 1209 `locate-file' uses a hashing scheme to speed lookup, and will correctly | |
| 1210 track the following environmental changes: | |
| 1211 | |
| 1212 -- changes of any sort to the list of directories to be searched. | |
| 1213 -- addition and deletion of non-shadowing files (see below) from the | |
| 1214 directories in the list. | |
| 1215 -- byte-compilation of a .el file into a .elc file. | |
| 1216 | |
| 1217 `locate-file' will primarily get confused if you add a file that shadows | |
| 1218 \(i.e. has the same name as) another file further down in the directory list. | |
| 1219 In this case, you must call `locate-file-clear-hashing'. | |
| 1220 | |
| 1221 If PATH is t, it means to fully clear all the accumulated hashes. This | |
| 1222 can be used if the internal tables grow too large, or when dumping. | |
| 1223 */ | |
| 1224 (path)) | |
| 1225 { | |
| 1226 if (EQ (path, Qt)) | |
| 1227 Fclrhash (Vlocate_file_hash_table); | |
| 1228 else | |
| 1229 { | |
| 2367 | 1230 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1231 { |
| 2367 | 1232 Lisp_Object pathel = Fexpand_file_name (elt, Qnil); |
| 428 | 1233 Fremhash (pathel, Vlocate_file_hash_table); |
| 1234 } | |
| 1235 } | |
| 1236 return Qnil; | |
| 1237 } | |
| 1238 | |
| 1239 /* Search for a file whose name is STR, looking in directories | |
| 1240 in the Lisp list PATH, and trying suffixes from SUFFIXES. | |
| 1241 SUFFIXES is a list of possible suffixes, or (for backward | |
| 1242 compatibility) a string containing possible suffixes separated by | |
| 1243 colons. | |
| 1244 On success, returns a file descriptor. On failure, returns -1. | |
| 1245 | |
| 1246 MODE nonnegative means don't open the files, | |
| 1247 just look for one for which access(file,MODE) succeeds. In this case, | |
| 951 | 1248 returns a nonnegative value on success. On failure, returns -1. |
| 428 | 1249 |
| 2548 | 1250 If STOREPTR is non-nil, it points to a slot where the name of |
| 428 | 1251 the file actually found should be stored as a Lisp string. |
| 1252 Nil is stored there on failure. | |
| 1253 | |
| 1254 Called openp() in FSFmacs. */ | |
| 1255 | |
| 1256 int | |
| 1257 locate_file (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, | |
| 1258 Lisp_Object *storeptr, int mode) | |
| 1259 { | |
| 1260 /* This function can GC */ | |
| 1261 Lisp_Object suffixtab = Qnil; | |
| 2367 | 1262 Lisp_Object pathel_expanded; |
| 428 | 1263 int val; |
| 1264 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1265 | |
| 1266 if (storeptr) | |
| 1267 *storeptr = Qnil; | |
| 1268 | |
| 1269 /* Is it really necessary to gcpro path and str? It shouldn't be | |
| 1270 unless some caller has fucked up. There are known instances that | |
| 1271 call us with build_string("foo:bar") as SUFFIXES, though. */ | |
| 1272 GCPRO4 (path, str, suffixes, suffixtab); | |
| 1273 | |
| 1274 /* if this filename has directory components, it's too complicated | |
| 1275 to try and use the hash tables. */ | |
| 1276 if (!NILP (Ffile_name_directory (str))) | |
| 1277 { | |
| 1278 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1279 UNGCPRO; | |
| 1280 return val; | |
| 1281 } | |
| 1282 | |
| 1283 suffixtab = locate_file_construct_suffixed_files (str, suffixes); | |
| 1284 | |
| 2367 | 1285 { |
| 1286 EXTERNAL_LIST_LOOP_2 (pathel, path) | |
| 1287 { | |
| 1288 Lisp_Object hash_table; | |
| 1289 int found = 0; | |
| 1290 | |
| 1291 /* If this path element is relative, we have to look by hand. */ | |
| 1292 if (NILP (pathel) || NILP (Ffile_name_absolute_p (pathel))) | |
| 1293 { | |
| 1294 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1295 mode); | |
| 1296 if (val >= 0) | |
| 428 | 1297 { |
| 2367 | 1298 UNGCPRO; |
| 1299 return val; | |
| 428 | 1300 } |
| 2367 | 1301 continue; |
| 1302 } | |
| 1303 | |
| 1304 pathel_expanded = Fexpand_file_name (pathel, Qnil); | |
| 1305 hash_table = locate_file_find_directory_hash_table (pathel_expanded); | |
| 1306 | |
| 1307 if (!NILP (hash_table)) | |
| 1308 { | |
| 1309 /* Loop over suffixes. */ | |
| 1310 LIST_LOOP_2 (elt, suffixtab) | |
| 1311 if (!NILP (Fgethash (elt, hash_table, Qnil))) | |
| 1312 { | |
| 1313 found = 1; | |
| 1314 break; | |
| 1315 } | |
| 1316 } | |
| 1317 | |
| 1318 if (found) | |
| 1319 { | |
| 1320 /* This is a likely candidate. Look by hand in this directory | |
| 1321 so we don't get thrown off if someone byte-compiles a file. */ | |
| 1322 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1323 mode); | |
| 1324 if (val >= 0) | |
| 1325 { | |
| 1326 UNGCPRO; | |
| 1327 return val; | |
| 1328 } | |
| 1329 | |
| 1330 /* Hmm ... the file isn't actually there. (Or possibly it's | |
| 1331 a directory ...) So refresh our hashing. */ | |
| 1332 locate_file_refresh_hashing (pathel_expanded); | |
| 1333 } | |
| 1334 } | |
| 428 | 1335 } |
| 1336 | |
| 1337 /* File is probably not there, but check the hard way just in case. */ | |
| 1338 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1339 if (val >= 0) | |
| 1340 { | |
| 1341 /* Sneaky user added a file without telling us. */ | |
| 1342 Flocate_file_clear_hashing (path); | |
| 1343 } | |
| 1344 | |
| 1345 UNGCPRO; | |
| 1346 return val; | |
| 1347 } | |
| 1348 | |
| 1349 | |
| 1350 #ifdef LOADHIST | |
| 1351 | |
| 1352 /* Merge the list we've accumulated of globals from the current input source | |
| 1353 into the load_history variable. The details depend on whether | |
| 1354 the source has an associated file name or not. */ | |
| 1355 | |
| 1356 static void | |
| 1357 build_load_history (int loading, Lisp_Object source) | |
| 1358 { | |
| 1359 REGISTER Lisp_Object tail, prev, newelt; | |
| 1360 REGISTER Lisp_Object tem, tem2; | |
| 1361 int foundit; | |
| 1362 | |
| 1363 #if !defined(LOADHIST_DUMPED) | |
| 1364 /* Don't bother recording anything for preloaded files. */ | |
| 1365 if (purify_flag) | |
| 1366 return; | |
| 1367 #endif | |
| 1368 | |
| 1369 tail = Vload_history; | |
| 1370 prev = Qnil; | |
| 1371 foundit = 0; | |
| 1372 while (!NILP (tail)) | |
| 1373 { | |
| 1374 tem = Fcar (tail); | |
| 1375 | |
| 1376 /* Find the feature's previous assoc list... */ | |
| 1377 if (internal_equal (source, Fcar (tem), 0)) | |
| 1378 { | |
| 1379 foundit = 1; | |
| 1380 | |
| 1381 /* If we're loading, remove it. */ | |
| 1382 if (loading) | |
| 1383 { | |
| 1384 if (NILP (prev)) | |
| 1385 Vload_history = Fcdr (tail); | |
| 1386 else | |
| 1387 Fsetcdr (prev, Fcdr (tail)); | |
| 1388 } | |
| 1389 | |
| 1390 /* Otherwise, cons on new symbols that are not already members. */ | |
| 1391 else | |
| 1392 { | |
| 1393 tem2 = Vcurrent_load_list; | |
| 1394 | |
| 1395 while (CONSP (tem2)) | |
| 1396 { | |
| 1397 newelt = XCAR (tem2); | |
| 1398 | |
| 1399 if (NILP (Fmemq (newelt, tem))) | |
| 1400 Fsetcar (tail, Fcons (Fcar (tem), | |
| 1401 Fcons (newelt, Fcdr (tem)))); | |
| 1402 | |
| 1403 tem2 = XCDR (tem2); | |
| 1404 QUIT; | |
| 1405 } | |
| 1406 } | |
| 1407 } | |
| 1408 else | |
| 1409 prev = tail; | |
| 1410 tail = Fcdr (tail); | |
| 1411 QUIT; | |
| 1412 } | |
| 1413 | |
| 1414 /* If we're loading, cons the new assoc onto the front of load-history, | |
| 1415 the most-recently-loaded position. Also do this if we didn't find | |
| 1416 an existing member for the current source. */ | |
| 1417 if (loading || !foundit) | |
| 1418 Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
| 1419 Vload_history); | |
| 1420 } | |
| 1421 | |
| 1422 #else /* !LOADHIST */ | |
| 1423 #define build_load_history(x,y) | |
| 1424 #endif /* !LOADHIST */ | |
| 1425 | |
| 1426 | |
| 1427 static void | |
| 1428 readevalloop (Lisp_Object readcharfun, | |
| 1429 Lisp_Object sourcename, | |
| 1430 Lisp_Object (*evalfun) (Lisp_Object), | |
| 1431 int printflag) | |
| 1432 { | |
| 1433 /* This function can GC */ | |
| 867 | 1434 REGISTER Ichar c; |
| 1849 | 1435 Lisp_Object val = Qnil; |
| 428 | 1436 int speccount = specpdl_depth (); |
| 1437 struct gcpro gcpro1, gcpro2; | |
| 1438 struct buffer *b = 0; | |
| 1439 | |
| 1440 if (BUFFERP (readcharfun)) | |
| 1441 b = XBUFFER (readcharfun); | |
| 1442 else if (MARKERP (readcharfun)) | |
| 1443 b = XMARKER (readcharfun)->buffer; | |
| 1444 | |
| 1445 /* Don't do this. It is not necessary, and it needlessly exposes | |
| 1446 READCHARFUN (which can be a stream) to Lisp. --hniksic */ | |
| 1447 /*specbind (Qstandard_input, readcharfun);*/ | |
| 1448 | |
| 2548 | 1449 internal_bind_lisp_object (&Vcurrent_load_list, Qnil); |
| 428 | 1450 |
| 1451 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1452 Vcurrent_compiled_function_annotation = Qnil; | |
| 1453 #endif | |
| 1454 GCPRO2 (val, sourcename); | |
| 1455 | |
| 1456 LOADHIST_ATTACH (sourcename); | |
| 1457 | |
| 1458 while (1) | |
| 1459 { | |
| 1460 QUIT; | |
| 1461 | |
| 1462 if (b != 0 && !BUFFER_LIVE_P (b)) | |
| 563 | 1463 invalid_operation ("Reading from killed buffer", Qunbound); |
| 428 | 1464 |
| 1465 c = readchar (readcharfun); | |
| 1466 if (c == ';') | |
| 1467 { | |
| 1468 /* Skip comment */ | |
| 1469 while ((c = readchar (readcharfun)) != '\n' && c != -1) | |
| 1470 QUIT; | |
| 1471 continue; | |
| 1472 } | |
| 1473 if (c < 0) | |
| 1474 break; | |
| 1475 | |
| 1476 /* Ignore whitespace here, so we can detect eof. */ | |
| 1477 if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
| 1478 continue; | |
| 1479 | |
| 814 | 1480 unreadchar (readcharfun, c); |
| 1481 Vread_objects = Qnil; | |
| 1482 if (NILP (Vload_read_function)) | |
| 1483 val = read0 (readcharfun); | |
| 428 | 1484 else |
| 814 | 1485 val = call1 (Vload_read_function, readcharfun); |
| 428 | 1486 val = (*evalfun) (val); |
| 1487 if (printflag) | |
| 1488 { | |
| 1489 Vvalues = Fcons (val, Vvalues); | |
| 1490 if (EQ (Vstandard_output, Qt)) | |
| 1491 Fprin1 (val, Qnil); | |
| 1492 else | |
| 1493 Fprint (val, Qnil); | |
| 1494 } | |
| 1495 } | |
| 1496 | |
| 1497 build_load_history (LSTREAMP (readcharfun) || | |
| 1498 /* This looks weird, but it's what's in FSFmacs */ | |
| 1499 (b ? BUF_NARROWED (b) : BUF_NARROWED (current_buffer)), | |
| 1500 sourcename); | |
| 1501 UNGCPRO; | |
| 1502 | |
| 771 | 1503 unbind_to (speccount); |
| 428 | 1504 } |
| 1505 | |
| 1506 DEFUN ("eval-buffer", Feval_buffer, 0, 2, "bBuffer: ", /* | |
| 1507 Execute BUFFER as Lisp code. | |
| 1508 Programs can pass two arguments, BUFFER and PRINTFLAG. | |
| 1509 BUFFER is the buffer to evaluate (nil means use current buffer). | |
| 1510 PRINTFLAG controls printing of output: | |
| 444 | 1511 nil means discard it; anything else is a stream for printing. |
| 428 | 1512 |
| 1513 If there is no error, point does not move. If there is an error, | |
| 1514 point remains at the end of the last character read from the buffer. | |
| 1515 */ | |
| 444 | 1516 (buffer, printflag)) |
| 428 | 1517 { |
| 1518 /* This function can GC */ | |
| 1519 int speccount = specpdl_depth (); | |
| 1520 Lisp_Object tem, buf; | |
| 1521 | |
| 444 | 1522 if (NILP (buffer)) |
| 428 | 1523 buf = Fcurrent_buffer (); |
| 1524 else | |
| 444 | 1525 buf = Fget_buffer (buffer); |
| 428 | 1526 if (NILP (buf)) |
| 563 | 1527 invalid_argument ("No such buffer", Qunbound); |
| 428 | 1528 |
| 1529 if (NILP (printflag)) | |
| 1530 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ | |
| 1531 else | |
| 1532 tem = printflag; | |
| 1533 specbind (Qstandard_output, tem); | |
| 1534 record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
| 1535 BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
| 1536 readevalloop (buf, XBUFFER (buf)->filename, Feval, | |
| 1537 !NILP (printflag)); | |
| 1538 | |
| 771 | 1539 return unbind_to (speccount); |
| 428 | 1540 } |
| 1541 | |
| 1542 #if 0 | |
| 826 | 1543 DEFUN ("eval-current-buffer", Feval_current_buffer, 0, 1, "", /* |
| 428 | 1544 Execute the current buffer as Lisp code. |
| 1545 Programs can pass argument PRINTFLAG which controls printing of output: | |
| 1546 nil means discard it; anything else is stream for print. | |
| 1547 | |
| 1548 If there is no error, point does not move. If there is an error, | |
| 1549 point remains at the end of the last character read from the buffer. | |
| 1550 */ | |
| 1551 (printflag)) | |
| 1552 { | |
| 1553 code omitted; | |
| 1554 } | |
| 1555 #endif /* 0 */ | |
| 1556 | |
| 1557 DEFUN ("eval-region", Feval_region, 2, 3, "r", /* | |
| 1558 Execute the region as Lisp code. | |
| 444 | 1559 When called from programs, expects two arguments START and END |
| 428 | 1560 giving starting and ending indices in the current buffer |
| 1561 of the text to be executed. | |
| 444 | 1562 Programs can pass third optional argument STREAM which controls output: |
| 428 | 1563 nil means discard it; anything else is stream for printing it. |
| 1564 | |
| 1565 If there is no error, point does not move. If there is an error, | |
| 1566 point remains at the end of the last character read from the buffer. | |
| 1567 | |
| 1568 Note: Before evaling the region, this function narrows the buffer to it. | |
| 1569 If the code being eval'd should happen to trigger a redisplay you may | |
| 1570 see some text temporarily disappear because of this. | |
| 1571 */ | |
| 444 | 1572 (start, end, stream)) |
| 428 | 1573 { |
| 1574 /* This function can GC */ | |
| 1575 int speccount = specpdl_depth (); | |
| 1576 Lisp_Object tem; | |
| 1577 Lisp_Object cbuf = Fcurrent_buffer (); | |
| 1578 | |
| 444 | 1579 if (NILP (stream)) |
| 428 | 1580 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ |
| 1581 else | |
| 444 | 1582 tem = stream; |
| 428 | 1583 specbind (Qstandard_output, tem); |
| 1584 | |
| 444 | 1585 if (NILP (stream)) |
| 428 | 1586 record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 844 | 1587 record_unwind_protect (save_restriction_restore, |
| 1588 save_restriction_save (current_buffer)); | |
| 428 | 1589 |
| 444 | 1590 /* This both uses start and checks its type. */ |
| 1591 Fgoto_char (start, cbuf); | |
| 1592 Fnarrow_to_region (make_int (BUF_BEGV (current_buffer)), end, cbuf); | |
| 428 | 1593 readevalloop (cbuf, XBUFFER (cbuf)->filename, Feval, |
| 444 | 1594 !NILP (stream)); |
| 428 | 1595 |
| 771 | 1596 return unbind_to (speccount); |
| 428 | 1597 } |
| 1598 | |
| 1599 DEFUN ("read", Fread, 0, 1, 0, /* | |
| 1600 Read one Lisp expression as text from STREAM, return as Lisp object. | |
| 1601 If STREAM is nil, use the value of `standard-input' (which see). | |
| 1602 STREAM or the value of `standard-input' may be: | |
| 1603 a buffer (read from point and advance it) | |
| 1604 a marker (read from where it points and advance it) | |
| 1605 a function (call it with no arguments for each character, | |
| 1606 call it with a char as argument to push a char back) | |
| 1607 a string (takes text from string, starting at the beginning) | |
| 1608 t (read text line using minibuffer and use it). | |
| 1609 */ | |
| 1610 (stream)) | |
| 1611 { | |
| 1612 if (NILP (stream)) | |
| 1613 stream = Vstandard_input; | |
| 1614 if (EQ (stream, Qt)) | |
| 1615 stream = Qread_char; | |
| 1616 | |
| 1617 Vread_objects = Qnil; | |
| 1618 | |
| 1619 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1620 Vcurrent_compiled_function_annotation = Qnil; | |
| 1621 #endif | |
| 1622 if (EQ (stream, Qread_char)) | |
| 1623 { | |
| 1624 Lisp_Object val = call1 (Qread_from_minibuffer, | |
| 771 | 1625 build_msg_string ("Lisp expression: ")); |
| 428 | 1626 return Fcar (Fread_from_string (val, Qnil, Qnil)); |
| 1627 } | |
| 1628 | |
| 1629 if (STRINGP (stream)) | |
| 1630 return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
| 1631 | |
| 1632 return read0 (stream); | |
| 1633 } | |
| 1634 | |
| 1635 DEFUN ("read-from-string", Fread_from_string, 1, 3, 0, /* | |
| 1636 Read one Lisp expression which is represented as text by STRING. | |
| 1637 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
| 1638 START and END optionally delimit a substring of STRING from which to read; | |
| 1639 they default to 0 and (length STRING) respectively. | |
| 1640 */ | |
| 1641 (string, start, end)) | |
| 1642 { | |
| 1643 Bytecount startval, endval; | |
| 1644 Lisp_Object tem; | |
| 1645 Lisp_Object lispstream = Qnil; | |
| 1646 struct gcpro gcpro1; | |
| 1647 | |
| 1648 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1649 Vcurrent_compiled_function_annotation = Qnil; | |
| 1650 #endif | |
| 1651 GCPRO1 (lispstream); | |
| 1652 CHECK_STRING (string); | |
| 1653 get_string_range_byte (string, start, end, &startval, &endval, | |
| 1654 GB_HISTORICAL_STRING_BEHAVIOR); | |
| 1655 lispstream = make_lisp_string_input_stream (string, startval, | |
| 1656 endval - startval); | |
| 1657 | |
| 1658 Vread_objects = Qnil; | |
| 1659 | |
| 1660 tem = read0 (lispstream); | |
| 1661 /* Yeah, it's ugly. Gonna make something of it? | |
| 1662 At least our reader is reentrant ... */ | |
| 1663 tem = | |
| 1664 (Fcons (tem, make_int | |
| 793 | 1665 (string_index_byte_to_char |
| 771 | 1666 (string, |
| 428 | 1667 startval + Lstream_byte_count (XLSTREAM (lispstream)))))); |
| 1668 Lstream_delete (XLSTREAM (lispstream)); | |
| 1669 UNGCPRO; | |
| 1670 return tem; | |
| 1671 } | |
| 1672 | |
| 1673 | |
| 1674 | |
| 1675 /* Use this for recursive reads, in contexts where internal tokens | |
| 1676 are not allowed. See also read1(). */ | |
| 1677 static Lisp_Object | |
| 1678 read0 (Lisp_Object readcharfun) | |
| 1679 { | |
| 1680 Lisp_Object val = read1 (readcharfun); | |
| 1681 | |
| 1682 if (CONSP (val) && UNBOUNDP (XCAR (val))) | |
| 1683 { | |
| 867 | 1684 Ichar c = XCHAR (XCDR (val)); |
| 853 | 1685 free_cons (val); |
| 428 | 1686 return Fsignal (Qinvalid_read_syntax, |
| 1687 list1 (Fchar_to_string (make_char (c)))); | |
| 1688 } | |
| 1689 | |
| 1690 return val; | |
| 1691 } | |
| 3543 | 1692 |
| 1693 /* A Unicode escape, as in C# (though we only permit them in strings | |
| 1694 and characters, not arbitrarily in the source code.) */ | |
| 1695 static Ichar | |
| 1696 read_unicode_escape (Lisp_Object readcharfun, int unicode_hex_count) | |
| 1697 { | |
| 1698 REGISTER Ichar i = 0, c; | |
| 1699 REGISTER int count = 0; | |
| 1700 Lisp_Object lisp_char; | |
| 1701 while (++count <= unicode_hex_count) | |
| 1702 { | |
| 1703 c = readchar (readcharfun); | |
| 1704 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ | |
| 1705 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); | |
| 1706 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1707 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1708 else | |
| 1709 { | |
| 1710 syntax_error ("Non-hex digit used for Unicode escape", | |
| 1711 make_char (c)); | |
| 1712 break; | |
| 1713 } | |
| 1714 } | |
| 1715 | |
| 4268 | 1716 if (i >= 0x110000 || i < 0) |
| 4096 | 1717 { |
| 1718 syntax_error ("Not a Unicode code point", make_int(i)); | |
| 1719 } | |
| 1720 | |
| 3543 | 1721 lisp_char = Funicode_to_char(make_int(i), Qnil); |
| 1722 | |
| 1723 if (EQ(Qnil, lisp_char)) | |
| 1724 { | |
| 4096 | 1725 /* Will happen on non-Mule. Silent corruption is what happens |
| 1726 elsewhere, and we used to do that to be consistent, but GNU error, | |
| 1727 so people writing portable code need to be able to handle that, and | |
| 1728 given a choice I prefer that behaviour. | |
| 1729 | |
| 1730 An undesirable aspect to this error is that the code point is shown | |
| 1731 as a decimal integer, which is mostly unreadable. */ | |
| 1732 syntax_error ("Unsupported Unicode code point", make_int(i)); | |
| 3543 | 1733 } |
| 4096 | 1734 |
| 1735 return XCHAR(lisp_char); | |
| 3543 | 1736 } |
| 1737 | |
| 428 | 1738 |
| 867 | 1739 static Ichar |
| 428 | 1740 read_escape (Lisp_Object readcharfun) |
| 1741 { | |
| 1742 /* This function can GC */ | |
| 867 | 1743 Ichar c = readchar (readcharfun); |
| 428 | 1744 |
| 1745 if (c < 0) | |
| 563 | 1746 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1747 |
| 1748 switch (c) | |
| 1749 { | |
| 1750 case 'a': return '\007'; | |
| 1751 case 'b': return '\b'; | |
| 1752 case 'd': return 0177; | |
| 1753 case 'e': return 033; | |
| 1754 case 'f': return '\f'; | |
| 1755 case 'n': return '\n'; | |
| 1756 case 'r': return '\r'; | |
| 1757 case 't': return '\t'; | |
| 1758 case 'v': return '\v'; | |
| 1759 case '\n': return -1; | |
| 1760 | |
| 1761 case 'M': | |
| 1762 c = readchar (readcharfun); | |
| 1763 if (c < 0) | |
| 563 | 1764 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1765 if (c != '-') |
| 563 | 1766 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1767 c = readchar (readcharfun); |
| 1768 if (c < 0) | |
| 563 | 1769 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1770 if (c == '\\') |
| 1771 c = read_escape (readcharfun); | |
| 1772 return c | 0200; | |
| 1773 | |
| 1774 /* Originally, FSF_KEYS provided a degree of FSF Emacs | |
| 1775 compatibility by defining character "modifiers" alt, super, | |
| 1776 hyper and shift to infest the characters (i.e. integers). | |
| 1777 | |
| 1778 However, this doesn't cut it for XEmacs 20, which | |
| 1779 distinguishes characters from integers. Without Mule, ?\H-a | |
| 1780 simply returns ?a because every character is clipped into | |
| 1781 0-255. Under Mule it is much worse -- ?\H-a with FSF_KEYS | |
| 1782 produces an illegal character, and moves us to crash-land. | |
| 1783 | |
| 1784 For these reasons, FSF_KEYS hack is useless and without hope | |
| 1785 of ever working under XEmacs 20. */ | |
| 1786 #ifdef FSF_KEYS | |
| 831 | 1787 /* Deleted */ |
| 1788 #endif | |
| 428 | 1789 |
| 1790 case 'C': | |
| 1791 c = readchar (readcharfun); | |
| 1792 if (c < 0) | |
| 563 | 1793 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1794 if (c != '-') |
| 563 | 1795 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1796 case '^': |
| 1797 c = readchar (readcharfun); | |
| 1798 if (c < 0) | |
| 563 | 1799 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1800 if (c == '\\') |
| 1801 c = read_escape (readcharfun); | |
| 1802 /* FSFmacs junk for non-ASCII controls. | |
| 1803 Not used here. */ | |
| 1804 if (c == '?') | |
| 1805 return 0177; | |
| 1806 else | |
| 1807 return c & (0200 | 037); | |
| 1808 | |
| 1809 case '0': | |
| 1810 case '1': | |
| 1811 case '2': | |
| 1812 case '3': | |
| 1813 case '4': | |
| 1814 case '5': | |
| 1815 case '6': | |
| 1816 case '7': | |
| 1817 /* An octal escape, as in ANSI C. */ | |
| 1818 { | |
| 867 | 1819 REGISTER Ichar i = c - '0'; |
| 428 | 1820 REGISTER int count = 0; |
| 1821 while (++count < 3) | |
| 1822 { | |
| 1823 if ((c = readchar (readcharfun)) >= '0' && c <= '7') | |
| 1824 i = (i << 3) + (c - '0'); | |
| 1825 else | |
| 1826 { | |
| 1827 unreadchar (readcharfun, c); | |
| 1828 break; | |
| 1829 } | |
| 1830 } | |
| 831 | 1831 if (i >= 0400) |
| 3367 | 1832 syntax_error ("Non-ISO-8859-1 character specified with octal escape", |
| 831 | 1833 make_int (i)); |
| 428 | 1834 return i; |
| 1835 } | |
| 1836 | |
| 1837 case 'x': | |
| 1838 /* A hex escape, as in ANSI C, except that we only allow latin-1 | |
| 1839 characters to be read this way. What is "\x4e03" supposed to | |
| 1840 mean, anyways, if the internal representation is hidden? | |
| 1841 This is also consistent with the treatment of octal escapes. */ | |
| 1842 { | |
| 867 | 1843 REGISTER Ichar i = 0; |
| 428 | 1844 REGISTER int count = 0; |
| 1845 while (++count <= 2) | |
| 1846 { | |
| 1847 c = readchar (readcharfun); | |
| 867 | 1848 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ |
| 428 | 1849 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
| 1850 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1851 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1852 else | |
| 1853 { | |
| 1854 unreadchar (readcharfun, c); | |
| 1855 break; | |
| 1856 } | |
| 1857 } | |
| 1858 return i; | |
| 1859 } | |
| 3367 | 1860 case 'U': |
| 1861 /* Post-Unicode-2.0: Up to eight hex chars */ | |
| 3543 | 1862 return read_unicode_escape(readcharfun, 8); |
| 3367 | 1863 case 'u': |
| 3543 | 1864 /* Unicode-2.0 and before; four hex chars. */ |
| 1865 return read_unicode_escape(readcharfun, 4); | |
| 428 | 1866 |
| 1867 default: | |
| 1868 return c; | |
| 1869 } | |
| 1870 } | |
| 1871 | |
| 1872 | |
| 1873 | |
| 1874 /* read symbol-constituent stuff into `Vread_buffer_stream'. */ | |
| 1875 static Bytecount | |
| 867 | 1876 read_atom_0 (Lisp_Object readcharfun, Ichar firstchar, int *saw_a_backslash) |
| 428 | 1877 { |
| 1878 /* This function can GC */ | |
| 867 | 1879 Ichar c = ((firstchar) >= 0 ? firstchar : readchar (readcharfun)); |
| 428 | 1880 Lstream_rewind (XLSTREAM (Vread_buffer_stream)); |
| 1881 | |
| 1882 *saw_a_backslash = 0; | |
| 1883 | |
| 1884 while (c > 040 /* #### - comma should be here as should backquote */ | |
| 1885 && !(c == '\"' || c == '\'' || c == ';' | |
| 1886 || c == '(' || c == ')' | |
| 1887 || c == '[' || c == ']' || c == '#' | |
| 1888 )) | |
| 1889 { | |
| 1890 if (c == '\\') | |
| 1891 { | |
| 1892 c = readchar (readcharfun); | |
| 1893 if (c < 0) | |
| 563 | 1894 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1895 *saw_a_backslash = 1; |
| 1896 } | |
| 867 | 1897 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), c); |
| 428 | 1898 QUIT; |
| 1899 c = readchar (readcharfun); | |
| 1900 } | |
| 1901 | |
| 1902 if (c >= 0) | |
| 1903 unreadchar (readcharfun, c); | |
| 1904 /* blasted terminating 0 */ | |
| 867 | 1905 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), 0); |
| 428 | 1906 Lstream_flush (XLSTREAM (Vread_buffer_stream)); |
| 1907 | |
| 1908 return Lstream_byte_count (XLSTREAM (Vread_buffer_stream)) - 1; | |
| 1909 } | |
| 1910 | |
| 867 | 1911 static Lisp_Object parse_integer (const Ibyte *buf, Bytecount len, int base); |
| 428 | 1912 |
| 1913 static Lisp_Object | |
| 1914 read_atom (Lisp_Object readcharfun, | |
| 867 | 1915 Ichar firstchar, |
| 428 | 1916 int uninterned_symbol) |
| 1917 { | |
| 1918 /* This function can GC */ | |
| 1919 int saw_a_backslash; | |
| 1920 Bytecount len = read_atom_0 (readcharfun, firstchar, &saw_a_backslash); | |
| 1921 char *read_ptr = (char *) | |
| 1922 resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)); | |
| 1923 | |
| 1924 /* Is it an integer? */ | |
| 1925 if (! (saw_a_backslash || uninterned_symbol)) | |
| 1926 { | |
| 1927 /* If a token had any backslashes in it, it is disqualified from | |
| 1928 being an integer or a float. This means that 123\456 is a | |
| 1929 symbol, as is \123 (which is the way (intern "123") prints). | |
| 1930 Also, if token was preceded by #:, it's always a symbol. | |
| 1931 */ | |
| 1932 char *p = read_ptr + len; | |
| 1933 char *p1 = read_ptr; | |
| 1934 | |
| 1935 if (*p1 == '+' || *p1 == '-') p1++; | |
| 1936 if (p1 != p) | |
| 1937 { | |
| 1938 int c; | |
| 1939 | |
| 1940 while (p1 != p && (c = *p1) >= '0' && c <= '9') | |
| 1941 p1++; | |
| 1942 /* Integers can have trailing decimal points. */ | |
| 1943 if (p1 > read_ptr && p1 < p && *p1 == '.') | |
| 1944 p1++; | |
| 1945 if (p1 == p) | |
| 1946 { | |
| 1947 /* It is an integer. */ | |
| 1948 if (p1[-1] == '.') | |
| 1949 p1[-1] = '\0'; | |
| 1950 #if 0 | |
| 1951 { | |
| 1952 int number = 0; | |
| 1953 if (sizeof (int) == sizeof (EMACS_INT)) | |
| 1954 number = atoi (read_buffer); | |
| 1955 else if (sizeof (long) == sizeof (EMACS_INT)) | |
| 1956 number = atol (read_buffer); | |
| 1957 else | |
| 2500 | 1958 ABORT (); |
| 428 | 1959 return make_int (number); |
| 1960 } | |
| 1961 #else | |
| 867 | 1962 return parse_integer ((Ibyte *) read_ptr, len, 10); |
| 428 | 1963 #endif |
| 1964 } | |
| 1965 } | |
| 1983 | 1966 #ifdef HAVE_RATIO |
| 1967 if (isratio_string (read_ptr)) | |
| 1968 { | |
| 2013 | 1969 /* GMP ratio_set_string has no effect with initial + sign */ |
| 2010 | 1970 if (*read_ptr == '+') |
| 1971 read_ptr++; | |
| 1983 | 1972 ratio_set_string (scratch_ratio, read_ptr, 0); |
| 1973 ratio_canonicalize (scratch_ratio); | |
| 1974 return Fcanonicalize_number (make_ratio_rt (scratch_ratio)); | |
| 1975 } | |
| 1976 #endif | |
| 428 | 1977 if (isfloat_string (read_ptr)) |
| 1978 return make_float (atof (read_ptr)); | |
| 1979 } | |
| 1980 | |
| 1981 { | |
| 1982 Lisp_Object sym; | |
| 1983 if (uninterned_symbol) | |
| 867 | 1984 sym = Fmake_symbol ( make_string ((Ibyte *) read_ptr, len)); |
| 428 | 1985 else |
| 1986 { | |
| 867 | 1987 Lisp_Object name = make_string ((Ibyte *) read_ptr, len); |
| 428 | 1988 sym = Fintern (name, Qnil); |
| 1989 } | |
| 1990 return sym; | |
| 1991 } | |
| 1992 } | |
| 1993 | |
| 1994 | |
| 1995 static Lisp_Object | |
| 867 | 1996 parse_integer (const Ibyte *buf, Bytecount len, int base) |
| 428 | 1997 { |
| 867 | 1998 const Ibyte *lim = buf + len; |
| 1999 const Ibyte *p = buf; | |
| 428 | 2000 EMACS_UINT num = 0; |
| 2001 int negativland = 0; | |
| 2002 | |
| 2003 if (*p == '-') | |
| 2004 { | |
| 2005 negativland = 1; | |
| 2006 p++; | |
| 2007 } | |
| 2008 else if (*p == '+') | |
| 2009 { | |
| 2010 p++; | |
| 2011 } | |
| 2012 | |
| 2013 if (p == lim) | |
| 2014 goto loser; | |
| 2015 | |
| 2016 for (; (p < lim) && (*p != '\0'); p++) | |
| 2017 { | |
| 2018 int c = *p; | |
| 2019 EMACS_UINT onum; | |
| 2020 | |
| 2021 if (isdigit (c)) | |
| 2022 c = c - '0'; | |
| 2023 else if (isupper (c)) | |
| 2024 c = c - 'A' + 10; | |
| 2025 else if (islower (c)) | |
| 2026 c = c - 'a' + 10; | |
| 2027 else | |
| 2028 goto loser; | |
| 2029 | |
| 2030 if (c < 0 || c >= base) | |
| 2031 goto loser; | |
| 2032 | |
| 2033 onum = num; | |
| 2034 num = num * base + c; | |
| 2035 if (num < onum) | |
| 2036 goto overflow; | |
| 2037 } | |
| 2038 | |
| 2039 { | |
| 2040 EMACS_INT int_result = negativland ? - (EMACS_INT) num : (EMACS_INT) num; | |
| 2041 Lisp_Object result = make_int (int_result); | |
| 2042 if (num && ((XINT (result) < 0) != negativland)) | |
| 2043 goto overflow; | |
| 2044 if (XINT (result) != int_result) | |
| 2045 goto overflow; | |
| 2046 return result; | |
| 2047 } | |
| 2048 overflow: | |
| 1983 | 2049 #ifdef HAVE_BIGNUM |
| 2050 { | |
|
4329
d9eb5ea14f65
Provide %b in #'format; use it for converting between ints and bit vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4268
diff
changeset
|
2051 bignum_set_string (scratch_bignum, (const char *) buf, base); |
| 1983 | 2052 return make_bignum_bg (scratch_bignum); |
| 2053 } | |
| 2054 #else | |
| 428 | 2055 return Fsignal (Qinvalid_read_syntax, |
| 771 | 2056 list3 (build_msg_string |
| 428 | 2057 ("Integer constant overflow in reader"), |
| 2058 make_string (buf, len), | |
| 2059 make_int (base))); | |
| 1983 | 2060 #endif /* HAVE_BIGNUM */ |
| 428 | 2061 loser: |
| 2062 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2063 list3 (build_msg_string |
| 428 | 2064 ("Invalid integer constant in reader"), |
| 2065 make_string (buf, len), | |
| 2066 make_int (base))); | |
| 2067 } | |
| 2068 | |
| 2069 | |
| 2070 static Lisp_Object | |
| 2071 read_integer (Lisp_Object readcharfun, int base) | |
| 2072 { | |
| 2073 /* This function can GC */ | |
| 2074 int saw_a_backslash; | |
| 2075 Bytecount len = read_atom_0 (readcharfun, -1, &saw_a_backslash); | |
| 2076 return (parse_integer | |
| 2077 (resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)), | |
| 2078 ((saw_a_backslash) | |
| 2079 ? 0 /* make parse_integer signal error */ | |
| 2080 : len), | |
| 2081 base)); | |
| 2082 } | |
| 2083 | |
| 2084 static Lisp_Object | |
| 2085 read_bit_vector (Lisp_Object readcharfun) | |
| 2086 { | |
| 2087 unsigned_char_dynarr *dyn = Dynarr_new (unsigned_char); | |
| 440 | 2088 Lisp_Object val; |
| 428 | 2089 |
| 2090 while (1) | |
| 2091 { | |
| 444 | 2092 unsigned char bit; |
| 867 | 2093 Ichar c = readchar (readcharfun); |
| 444 | 2094 if (c == '0') |
| 2095 bit = 0; | |
| 2096 else if (c == '1') | |
| 2097 bit = 1; | |
| 2098 else | |
| 2099 { | |
| 2100 if (c >= 0) | |
| 2101 unreadchar (readcharfun, c); | |
| 2102 break; | |
| 2103 } | |
| 2104 Dynarr_add (dyn, bit); | |
| 428 | 2105 } |
| 2106 | |
| 440 | 2107 val = make_bit_vector_from_byte_vector (Dynarr_atp (dyn, 0), |
| 2108 Dynarr_length (dyn)); | |
| 2109 Dynarr_free (dyn); | |
| 2110 | |
| 2111 return val; | |
| 428 | 2112 } |
| 2113 | |
| 2114 | |
| 2115 | |
| 2116 /* structures */ | |
| 2117 | |
| 2118 struct structure_type * | |
| 2119 define_structure_type (Lisp_Object type, | |
| 2120 int (*validate) (Lisp_Object data, | |
| 578 | 2121 Error_Behavior errb), |
| 428 | 2122 Lisp_Object (*instantiate) (Lisp_Object data)) |
| 2123 { | |
| 2124 struct structure_type st; | |
| 2125 | |
| 2126 st.type = type; | |
| 2127 st.keywords = Dynarr_new (structure_keyword_entry); | |
| 2128 st.validate = validate; | |
| 2129 st.instantiate = instantiate; | |
| 2130 Dynarr_add (the_structure_type_dynarr, st); | |
| 2131 | |
| 2132 return Dynarr_atp (the_structure_type_dynarr, | |
| 2133 Dynarr_length (the_structure_type_dynarr) - 1); | |
| 2134 } | |
| 2135 | |
| 2136 void | |
| 2137 define_structure_type_keyword (struct structure_type *st, Lisp_Object keyword, | |
| 2138 int (*validate) (Lisp_Object keyword, | |
| 2139 Lisp_Object value, | |
| 578 | 2140 Error_Behavior errb)) |
| 428 | 2141 { |
| 2142 struct structure_keyword_entry en; | |
| 2143 | |
| 2144 en.keyword = keyword; | |
| 2145 en.validate = validate; | |
| 2146 Dynarr_add (st->keywords, en); | |
| 2147 } | |
| 2148 | |
| 2149 static struct structure_type * | |
| 2150 recognized_structure_type (Lisp_Object type) | |
| 2151 { | |
| 2152 int i; | |
| 2153 | |
| 2154 for (i = 0; i < Dynarr_length (the_structure_type_dynarr); i++) | |
| 2155 { | |
| 2156 struct structure_type *st = Dynarr_atp (the_structure_type_dynarr, i); | |
| 2157 if (EQ (st->type, type)) | |
| 2158 return st; | |
| 2159 } | |
| 2160 | |
| 2161 return 0; | |
| 2162 } | |
| 2163 | |
| 2164 static Lisp_Object | |
| 2165 read_structure (Lisp_Object readcharfun) | |
| 2166 { | |
| 867 | 2167 Ichar c = readchar (readcharfun); |
| 428 | 2168 Lisp_Object list = Qnil; |
| 2169 Lisp_Object orig_list = Qnil; | |
| 2170 Lisp_Object already_seen = Qnil; | |
| 2171 int keyword_count; | |
| 2172 struct structure_type *st; | |
| 2173 struct gcpro gcpro1, gcpro2; | |
| 2174 | |
| 2175 GCPRO2 (orig_list, already_seen); | |
| 2176 if (c != '(') | |
| 442 | 2177 RETURN_UNGCPRO (continuable_read_syntax_error ("#s not followed by paren")); |
| 428 | 2178 list = read_list (readcharfun, ')', 0, 0); |
| 2179 orig_list = list; | |
| 2180 { | |
| 2181 int len = XINT (Flength (list)); | |
| 2182 if (len == 0) | |
| 442 | 2183 RETURN_UNGCPRO (continuable_read_syntax_error |
| 428 | 2184 ("structure type not specified")); |
| 2185 if (!(len & 1)) | |
| 2186 RETURN_UNGCPRO | |
| 442 | 2187 (continuable_read_syntax_error |
| 428 | 2188 ("structures must have alternating keyword/value pairs")); |
| 2189 } | |
| 2190 | |
| 2191 st = recognized_structure_type (XCAR (list)); | |
| 2192 if (!st) | |
| 2193 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2194 list2 (build_msg_string |
| 428 | 2195 ("unrecognized structure type"), |
| 2196 XCAR (list)))); | |
| 2197 | |
| 2198 list = Fcdr (list); | |
| 2199 keyword_count = Dynarr_length (st->keywords); | |
| 2200 while (!NILP (list)) | |
| 2201 { | |
| 2202 Lisp_Object keyword, value; | |
| 2203 int i; | |
| 2204 struct structure_keyword_entry *en = NULL; | |
| 2205 | |
| 2206 keyword = Fcar (list); | |
| 2207 list = Fcdr (list); | |
| 2208 value = Fcar (list); | |
| 2209 list = Fcdr (list); | |
| 2210 | |
| 2211 if (!NILP (memq_no_quit (keyword, already_seen))) | |
| 2212 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2213 list2 (build_msg_string |
| 428 | 2214 ("structure keyword already seen"), |
| 2215 keyword))); | |
| 2216 | |
| 2217 for (i = 0; i < keyword_count; i++) | |
| 2218 { | |
| 2219 en = Dynarr_atp (st->keywords, i); | |
| 2220 if (EQ (keyword, en->keyword)) | |
| 2221 break; | |
| 2222 } | |
| 2223 | |
| 2224 if (i == keyword_count) | |
| 2225 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2226 list2 (build_msg_string |
| 428 | 2227 ("unrecognized structure keyword"), |
| 2228 keyword))); | |
| 2229 | |
| 2230 if (en->validate && ! (en->validate) (keyword, value, ERROR_ME)) | |
| 2231 RETURN_UNGCPRO | |
| 2232 (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2233 list3 (build_msg_string |
| 428 | 2234 ("invalid value for structure keyword"), |
| 2235 keyword, value))); | |
| 2236 | |
| 2237 already_seen = Fcons (keyword, already_seen); | |
| 2238 } | |
| 2239 | |
| 2240 if (st->validate && ! (st->validate) (orig_list, ERROR_ME)) | |
| 2241 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2242 list2 (build_msg_string |
| 428 | 2243 ("invalid structure initializer"), |
| 2244 orig_list))); | |
| 2245 | |
| 2246 RETURN_UNGCPRO ((st->instantiate) (XCDR (orig_list))); | |
| 2247 } | |
| 2248 | |
| 2249 | |
| 2250 static Lisp_Object read_compiled_function (Lisp_Object readcharfun, | |
| 2251 int terminator); | |
| 2252 static Lisp_Object read_vector (Lisp_Object readcharfun, int terminator); | |
| 2253 | |
| 2254 /* Get the next character; filter out whitespace and comments */ | |
| 2255 | |
| 867 | 2256 static Ichar |
| 428 | 2257 reader_nextchar (Lisp_Object readcharfun) |
| 2258 { | |
| 2259 /* This function can GC */ | |
| 867 | 2260 Ichar c; |
| 428 | 2261 |
| 2262 retry: | |
| 2263 QUIT; | |
| 2264 c = readchar (readcharfun); | |
| 2265 if (c < 0) | |
| 563 | 2266 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 2267 |
| 2268 switch (c) | |
| 2269 { | |
| 2270 default: | |
| 2271 { | |
| 2272 /* Ignore whitespace and control characters */ | |
| 2273 if (c <= 040) | |
| 2274 goto retry; | |
| 2275 return c; | |
| 2276 } | |
| 2277 | |
| 2278 case ';': | |
| 2279 { | |
| 2280 /* Comment */ | |
| 2281 while ((c = readchar (readcharfun)) >= 0 && c != '\n') | |
| 2282 QUIT; | |
| 2283 goto retry; | |
| 2284 } | |
| 2285 } | |
| 2286 } | |
| 2287 | |
| 2288 #if 0 | |
| 2289 static Lisp_Object | |
| 2290 list2_pure (int pure, Lisp_Object a, Lisp_Object b) | |
| 2291 { | |
| 2292 return pure ? pure_cons (a, pure_cons (b, Qnil)) : list2 (a, b); | |
| 2293 } | |
| 2294 #endif | |
| 2295 | |
| 3543 | 2296 static Lisp_Object |
| 2297 read_string (Lisp_Object readcharfun, Ichar delim, int raw, | |
| 2298 int honor_unicode) | |
| 2299 { | |
| 2300 #ifdef I18N3 | |
| 2301 /* #### If the input stream is translating, then the string | |
| 2302 should be marked as translatable by setting its | |
| 2303 `string-translatable' property to t. .el and .elc files | |
| 2304 normally are translating input streams. See Fgettext() | |
| 2305 and print_internal(). */ | |
| 2306 #endif | |
| 2307 Ichar c; | |
| 2308 int cancel = 0; | |
| 2309 | |
| 2310 Lstream_rewind(XLSTREAM(Vread_buffer_stream)); | |
| 2311 while ((c = readchar(readcharfun)) >= 0 && c != delim) | |
| 2312 { | |
| 2313 if (c == '\\') | |
| 2314 { | |
| 2315 if (raw) | |
| 2316 { | |
| 2317 c = readchar(readcharfun); | |
| 2318 if (honor_unicode && ('u' == c || 'U' == c)) | |
| 2319 { | |
| 2320 c = read_unicode_escape(readcharfun, | |
| 2321 'U' == c ? 8 : 4); | |
| 2322 } | |
| 2323 else | |
| 2324 { | |
| 2325 /* For raw strings, insert the | |
| 2326 backslash and the next char, */ | |
| 2327 Lstream_put_ichar(XLSTREAM | |
| 2328 (Vread_buffer_stream), | |
| 2329 '\\'); | |
| 2330 } | |
| 2331 } | |
| 2332 else | |
| 2333 /* otherwise, backslash escapes the next char. */ | |
| 2334 c = read_escape(readcharfun); | |
| 2335 } | |
| 2336 /* c is -1 if \ newline has just been seen */ | |
| 2337 if (c == -1) | |
| 2338 { | |
| 2339 if (Lstream_byte_count | |
| 2340 (XLSTREAM(Vread_buffer_stream)) == | |
| 2341 0) | |
| 2342 cancel = 1; | |
| 2343 } | |
| 2344 else | |
| 2345 Lstream_put_ichar(XLSTREAM | |
| 2346 (Vread_buffer_stream), | |
| 2347 c); | |
| 2348 QUIT; | |
| 2349 } | |
| 2350 if (c < 0) | |
| 2351 return Fsignal(Qend_of_file, | |
| 2352 list1(READCHARFUN_MAYBE(readcharfun))); | |
| 2353 | |
| 2354 /* If purifying, and string starts with \ newline, | |
| 2355 return zero instead. This is for doc strings | |
| 2356 that we are really going to find in lib-src/DOC.nn.nn */ | |
| 2357 if (purify_flag && NILP(Vinternal_doc_file_name) | |
| 2358 && cancel) | |
| 2359 return Qzero; | |
| 2360 | |
| 2361 Lstream_flush(XLSTREAM(Vread_buffer_stream)); | |
| 2362 return make_string(resizing_buffer_stream_ptr | |
| 2363 (XLSTREAM(Vread_buffer_stream)), | |
| 2364 Lstream_byte_count(XLSTREAM(Vread_buffer_stream))); | |
| 2365 } | |
| 2366 | |
| 2367 static Lisp_Object | |
| 2368 read_raw_string (Lisp_Object readcharfun) | |
| 2369 { | |
| 2370 Ichar c; | |
| 2371 Ichar permit_unicode = 0; | |
| 2372 | |
| 2373 do { | |
| 2374 c = reader_nextchar(readcharfun); | |
| 2375 switch (c) { | |
| 2376 /* #r:engine"my sexy raw string" -- raw string w/ flags*/ | |
| 2377 /* case ':': */ | |
| 2378 /* #ru"Hi there\u20AC \U000020AC" -- raw string, honouring Unicode. */ | |
| 2379 case 'u': | |
| 2380 case 'U': | |
| 2381 permit_unicode = c; | |
| 2382 continue; | |
| 2383 | |
| 2384 /* #r"my raw string" -- raw string */ | |
| 2385 case '\"': | |
| 2386 return read_string(readcharfun, '\"', 1, permit_unicode); | |
| 2387 /* invalid syntax */ | |
| 2388 default: | |
| 2389 { | |
| 2390 if (permit_unicode) | |
| 2391 { | |
| 2392 unreadchar(readcharfun, permit_unicode); | |
| 2393 } | |
| 2394 unreadchar(readcharfun, c); | |
| 2395 return Fsignal(Qinvalid_read_syntax, | |
| 2396 list1(build_string | |
| 2397 ("unrecognized raw string syntax"))); | |
| 2398 } | |
| 2399 } | |
| 2400 } while (1); | |
| 2401 } | |
| 2402 | |
| 428 | 2403 /* Read the next Lisp object from the stream READCHARFUN and return it. |
| 2404 If the return value is a cons whose car is Qunbound, then read1() | |
| 2405 encountered a misplaced token (e.g. a right bracket, right paren, | |
| 2406 or dot followed by a non-number). To filter this stuff out, | |
| 2407 use read0(). */ | |
| 2408 | |
| 2409 static Lisp_Object | |
| 2410 read1 (Lisp_Object readcharfun) | |
| 2411 { | |
| 867 | 2412 Ichar c; |
| 428 | 2413 |
| 2414 retry: | |
| 2415 c = reader_nextchar (readcharfun); | |
| 2416 | |
| 2417 switch (c) | |
| 2418 { | |
| 2419 case '(': | |
| 2420 { | |
| 2421 #ifdef LISP_BACKQUOTES /* old backquote compatibility in lisp reader */ | |
| 2422 /* if this is disabled, then other code in eval.c must be enabled */ | |
| 867 | 2423 Ichar ch = reader_nextchar (readcharfun); |
| 428 | 2424 switch (ch) |
| 2425 { | |
| 2426 case '`': | |
| 2427 { | |
| 2428 Lisp_Object tem; | |
| 853 | 2429 int speccount = internal_bind_int (&old_backquote_flag, |
| 2430 1 + old_backquote_flag); | |
| 428 | 2431 tem = read0 (readcharfun); |
| 771 | 2432 unbind_to (speccount); |
| 428 | 2433 ch = reader_nextchar (readcharfun); |
| 2434 if (ch != ')') | |
| 2435 { | |
| 2436 unreadchar (readcharfun, ch); | |
| 2437 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2438 list1 (build_msg_string |
| 428 | 2439 ("Weird old-backquote syntax"))); |
| 2440 } | |
| 2441 return list2 (Qbacktick, tem); | |
| 2442 } | |
| 2443 case ',': | |
| 2444 { | |
| 2445 if (old_backquote_flag) | |
| 2446 { | |
| 2447 Lisp_Object tem, comma_type; | |
| 2448 ch = readchar (readcharfun); | |
| 2449 if (ch == '@') | |
| 2450 comma_type = Qcomma_at; | |
| 2451 else | |
| 2452 { | |
| 2453 if (ch >= 0) | |
| 2454 unreadchar (readcharfun, ch); | |
| 2455 comma_type = Qcomma; | |
| 2456 } | |
| 2457 tem = read0 (readcharfun); | |
| 2458 ch = reader_nextchar (readcharfun); | |
| 2459 if (ch != ')') | |
| 2460 { | |
| 2461 unreadchar (readcharfun, ch); | |
| 2462 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2463 list1 (build_msg_string |
| 428 | 2464 ("Weird old-backquote syntax"))); |
| 2465 } | |
| 2466 return list2 (comma_type, tem); | |
| 2467 } | |
| 2468 else | |
| 2469 { | |
| 2470 unreadchar (readcharfun, ch); | |
| 2471 #if 0 | |
| 2472 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2473 list1 (build_msg_string ("Comma outside of backquote"))); |
| 428 | 2474 #else |
| 2475 /* #### - yuck....but this is reverse compatible. */ | |
| 2476 /* mostly this is required by edebug, which does its own | |
| 2477 annotated reading. We need to have an annotated_read | |
| 2478 function that records (with markers) the buffer | |
| 2479 positions of the elements that make up lists, then that | |
| 2480 can be used in edebug and bytecomp and the check above | |
| 2481 can go back in. --Stig */ | |
| 2482 break; | |
| 2483 #endif | |
| 2484 } | |
| 2485 } | |
| 2486 default: | |
| 2487 unreadchar (readcharfun, ch); | |
| 2488 } /* switch(ch) */ | |
| 2489 #endif /* old backquote crap... */ | |
| 2490 return read_list (readcharfun, ')', 1, 1); | |
| 2491 } | |
| 2492 case '[': | |
| 2493 return read_vector (readcharfun, ']'); | |
| 2494 | |
| 2495 case ')': | |
| 2496 case ']': | |
| 2497 /* #### - huh? these don't do what they seem... */ | |
| 2498 return noseeum_cons (Qunbound, make_char (c)); | |
| 2499 case '.': | |
| 2500 { | |
| 2501 /* If a period is followed by a number, then we should read it | |
| 2502 as a floating point number. Otherwise, it denotes a dotted | |
| 2503 pair. | |
| 2504 */ | |
| 2505 c = readchar (readcharfun); | |
| 2506 unreadchar (readcharfun, c); | |
| 2507 | |
| 867 | 2508 /* Can't use isdigit on Ichars */ |
| 428 | 2509 if (c < '0' || c > '9') |
| 2510 return noseeum_cons (Qunbound, make_char ('.')); | |
| 2511 | |
| 2512 /* Note that read_atom will loop | |
| 2513 at least once, assuring that we will not try to UNREAD | |
| 2514 two characters in a row. | |
| 2515 (I think this doesn't matter anymore because there should | |
| 2516 be no more danger in unreading multiple characters) */ | |
| 2517 return read_atom (readcharfun, '.', 0); | |
| 2518 } | |
| 2519 | |
| 2520 case '#': | |
| 2521 { | |
| 2522 c = readchar (readcharfun); | |
| 2523 switch (c) | |
| 2524 { | |
| 2525 #if 0 /* FSFmacs silly char-table syntax */ | |
| 2526 case '^': | |
| 2527 #endif | |
| 2528 #if 0 /* FSFmacs silly bool-vector syntax */ | |
| 2529 case '&': | |
| 2530 #endif | |
| 2531 /* "#["-- byte-code constant syntax */ | |
| 2532 /* purecons #[...] syntax */ | |
| 2533 case '[': return read_compiled_function (readcharfun, ']' | |
| 2534 /*, purify_flag */ ); | |
| 2535 /* "#:"-- gensym syntax */ | |
| 2536 case ':': return read_atom (readcharfun, -1, 1); | |
| 2537 /* #'x => (function x) */ | |
| 2538 case '\'': return list2 (Qfunction, read0 (readcharfun)); | |
| 2539 #if 0 | |
| 2540 /* RMS uses this syntax for fat-strings. | |
| 2541 If we use it for vectors, then obscure bugs happen. | |
| 2542 */ | |
| 2543 /* "#(" -- Scheme/CL vector syntax */ | |
| 2544 case '(': return read_vector (readcharfun, ')'); | |
| 2545 #endif | |
| 2546 #if 0 /* FSFmacs */ | |
| 2547 case '(': | |
| 2548 { | |
| 2549 Lisp_Object tmp; | |
| 2550 struct gcpro gcpro1; | |
| 2551 | |
| 2552 /* Read the string itself. */ | |
| 2553 tmp = read1 (readcharfun); | |
| 2554 if (!STRINGP (tmp)) | |
| 2555 { | |
| 2556 if (CONSP (tmp) && UNBOUNDP (XCAR (tmp))) | |
| 853 | 2557 free_cons (tmp); |
| 428 | 2558 return Fsignal (Qinvalid_read_syntax, |
| 2559 list1 (build_string ("#"))); | |
| 2560 } | |
| 2561 GCPRO1 (tmp); | |
| 2562 /* Read the intervals and their properties. */ | |
| 2563 while (1) | |
| 2564 { | |
| 2565 Lisp_Object beg, end, plist; | |
| 867 | 2566 Ichar ch; |
| 428 | 2567 int invalid = 0; |
| 2568 | |
| 2569 beg = read1 (readcharfun); | |
| 2570 if (CONSP (beg) && UNBOUNDP (XCAR (beg))) | |
| 2571 { | |
| 2572 ch = XCHAR (XCDR (beg)); | |
| 853 | 2573 free_cons (beg); |
| 428 | 2574 if (ch == ')') |
| 2575 break; | |
| 2576 else | |
| 2577 invalid = 1; | |
| 2578 } | |
| 2579 if (!invalid) | |
| 2580 { | |
| 2581 end = read1 (readcharfun); | |
| 2582 if (CONSP (end) && UNBOUNDP (XCAR (end))) | |
| 2583 { | |
| 853 | 2584 free_cons (end); |
| 428 | 2585 invalid = 1; |
| 2586 } | |
| 2587 } | |
| 2588 if (!invalid) | |
| 2589 { | |
| 2590 plist = read1 (readcharfun); | |
| 2591 if (CONSP (plist) && UNBOUNDP (XCAR (plist))) | |
| 2592 { | |
| 853 | 2593 free_cons (plist); |
| 428 | 2594 invalid = 1; |
| 2595 } | |
| 2596 } | |
| 2597 if (invalid) | |
| 2598 RETURN_UNGCPRO | |
| 2599 (Fsignal (Qinvalid_read_syntax, | |
| 2600 list2 | |
| 771 | 2601 (build_msg_string ("invalid string property list"), |
| 428 | 2602 XCDR (plist)))); |
| 2603 Fset_text_properties (beg, end, plist, tmp); | |
| 2604 } | |
| 2605 UNGCPRO; | |
| 2606 return tmp; | |
| 2607 } | |
| 2608 #endif /* 0 */ | |
| 2609 case '@': | |
| 2610 { | |
| 2611 /* #@NUMBER is used to skip NUMBER following characters. | |
| 2612 That's used in .elc files to skip over doc strings | |
| 2613 and function definitions. */ | |
| 2614 int i, nskip = 0; | |
| 2615 | |
| 2616 /* Read a decimal integer. */ | |
| 2617 while ((c = readchar (readcharfun)) >= 0 | |
| 2618 && c >= '0' && c <= '9') | |
| 2619 nskip = (10 * nskip) + (c - '0'); | |
| 2620 if (c >= 0) | |
| 2621 unreadchar (readcharfun, c); | |
| 2622 | |
| 2623 /* FSF has code here that maybe caches the skipped | |
| 2624 string. See above for why this is totally | |
| 2625 losing. We handle this differently. */ | |
| 2626 | |
| 2627 /* Skip that many characters. */ | |
| 2628 for (i = 0; i < nskip && c >= 0; i++) | |
| 2629 c = readchar (readcharfun); | |
| 2630 | |
| 2631 goto retry; | |
| 2632 } | |
| 2633 case '$': return Vload_file_name_internal; | |
| 2634 /* bit vectors */ | |
| 2635 case '*': return read_bit_vector (readcharfun); | |
| 2636 /* #o10 => 8 -- octal constant syntax */ | |
| 2637 case 'o': return read_integer (readcharfun, 8); | |
| 2638 /* #xdead => 57005 -- hex constant syntax */ | |
| 2639 case 'x': return read_integer (readcharfun, 16); | |
| 2640 /* #b010 => 2 -- binary constant syntax */ | |
| 2641 case 'b': return read_integer (readcharfun, 2); | |
| 3543 | 2642 /* #r"raw\stringt" -- raw string syntax */ |
| 2643 case 'r': return read_raw_string(readcharfun); | |
| 428 | 2644 /* #s(foobar key1 val1 key2 val2) -- structure syntax */ |
| 2645 case 's': return read_structure (readcharfun); | |
| 2646 case '<': | |
| 2647 { | |
| 2648 unreadchar (readcharfun, c); | |
| 2649 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2650 list1 (build_msg_string ("Cannot read unreadable object"))); |
| 428 | 2651 } |
| 2652 #ifdef FEATUREP_SYNTAX | |
| 2653 case '+': | |
| 2654 case '-': | |
| 2655 { | |
| 456 | 2656 Lisp_Object feature_exp, obj, tem; |
| 428 | 2657 struct gcpro gcpro1, gcpro2; |
| 2658 | |
| 456 | 2659 feature_exp = read0(readcharfun); |
| 428 | 2660 obj = read0(readcharfun); |
| 2661 | |
| 2662 /* the call to `featurep' may GC. */ | |
| 456 | 2663 GCPRO2 (feature_exp, obj); |
| 2664 tem = call1 (Qfeaturep, feature_exp); | |
| 428 | 2665 UNGCPRO; |
| 2666 | |
| 2667 if (c == '+' && NILP(tem)) goto retry; | |
| 2668 if (c == '-' && !NILP(tem)) goto retry; | |
| 2669 return obj; | |
| 2670 } | |
| 2671 #endif | |
| 2672 case '0': case '1': case '2': case '3': case '4': | |
| 2673 case '5': case '6': case '7': case '8': case '9': | |
| 2674 /* Reader forms that can reuse previously read objects. */ | |
| 2675 { | |
| 2676 int n = 0; | |
| 2677 Lisp_Object found; | |
| 2678 | |
| 2679 /* Using read_integer() here is impossible, because it | |
| 2680 chokes on `='. Using parse_integer() is too hard. | |
| 2681 So we simply read it in, and ignore overflows, which | |
| 2682 is safe. */ | |
| 2683 while (c >= '0' && c <= '9') | |
| 2684 { | |
| 2685 n *= 10; | |
| 2686 n += c - '0'; | |
| 2687 c = readchar (readcharfun); | |
| 2688 } | |
| 2689 found = assq_no_quit (make_int (n), Vread_objects); | |
| 2690 if (c == '=') | |
| 2691 { | |
| 2692 /* #n=object returns object, but associates it with | |
| 2693 n for #n#. */ | |
| 2694 Lisp_Object obj; | |
| 2695 if (CONSP (found)) | |
| 2696 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2697 list2 (build_msg_string |
| 428 | 2698 ("Multiply defined symbol label"), |
| 2699 make_int (n))); | |
| 2700 obj = read0 (readcharfun); | |
| 2701 Vread_objects = Fcons (Fcons (make_int (n), obj), | |
| 2702 Vread_objects); | |
| 2703 return obj; | |
| 2704 } | |
| 2705 else if (c == '#') | |
| 2706 { | |
| 2707 /* #n# returns a previously read object. */ | |
| 2708 if (CONSP (found)) | |
| 2709 return XCDR (found); | |
| 2710 else | |
| 2711 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2712 list2 (build_msg_string |
| 428 | 2713 ("Undefined symbol label"), |
| 2714 make_int (n))); | |
| 2715 } | |
| 2716 return Fsignal (Qinvalid_read_syntax, | |
| 2717 list1 (build_string ("#"))); | |
| 2718 } | |
| 2719 default: | |
| 2720 { | |
| 2721 unreadchar (readcharfun, c); | |
| 2722 return Fsignal (Qinvalid_read_syntax, | |
| 2723 list1 (build_string ("#"))); | |
| 2724 } | |
| 2725 } | |
| 2726 } | |
| 2727 | |
| 2728 /* Quote */ | |
| 2729 case '\'': return list2 (Qquote, read0 (readcharfun)); | |
| 2730 | |
| 2731 #ifdef LISP_BACKQUOTES | |
| 2732 case '`': | |
| 2733 { | |
| 2734 Lisp_Object tem; | |
| 853 | 2735 int speccount = internal_bind_int (&new_backquote_flag, |
| 2736 1 + new_backquote_flag); | |
| 428 | 2737 tem = read0 (readcharfun); |
| 771 | 2738 unbind_to (speccount); |
| 428 | 2739 return list2 (Qbackquote, tem); |
| 2740 } | |
| 2741 | |
| 2742 case ',': | |
| 2743 { | |
| 2744 if (new_backquote_flag) | |
| 2745 { | |
| 2746 Lisp_Object comma_type = Qnil; | |
| 2747 int ch = readchar (readcharfun); | |
| 2748 | |
| 2749 if (ch == '@') | |
| 2750 comma_type = Qcomma_at; | |
| 2751 else if (ch == '.') | |
| 2752 comma_type = Qcomma_dot; | |
| 2753 else | |
| 2754 { | |
| 2755 if (ch >= 0) | |
| 2756 unreadchar (readcharfun, ch); | |
| 2757 comma_type = Qcomma; | |
| 2758 } | |
| 2759 return list2 (comma_type, read0 (readcharfun)); | |
| 2760 } | |
| 2761 else | |
| 2762 { | |
| 2763 /* YUCK. 99.999% backwards compatibility. The Right | |
| 2764 Thing(tm) is to signal an error here, because it's | |
| 2765 really invalid read syntax. Instead, this permits | |
| 2766 commas to begin symbols (unless they're inside | |
| 2767 backquotes). If an error is signalled here in the | |
| 2768 future, then commas should be invalid read syntax | |
| 2769 outside of backquotes anywhere they're found (i.e. | |
| 2770 they must be quoted in symbols) -- Stig */ | |
| 2771 return read_atom (readcharfun, c, 0); | |
| 2772 } | |
| 2773 } | |
| 2774 #endif | |
| 2775 | |
| 2776 case '?': | |
| 2777 { | |
| 2778 /* Evil GNU Emacs "character" (ie integer) syntax */ | |
| 2779 c = readchar (readcharfun); | |
| 2780 if (c < 0) | |
| 2781 return Fsignal (Qend_of_file, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 2782 | |
| 2783 if (c == '\\') | |
| 2784 c = read_escape (readcharfun); | |
| 4439 | 2785 if (c < 0) |
| 2786 return Fsignal (Qinvalid_read_syntax, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 428 | 2787 return make_char (c); |
| 2788 } | |
| 2789 | |
| 2790 case '\"': | |
| 3543 | 2791 /* String */ |
| 2792 return read_string(readcharfun, '\"', 0, 1); | |
| 428 | 2793 |
| 2794 default: | |
| 2795 { | |
| 2796 /* Ignore whitespace and control characters */ | |
| 2797 if (c <= 040) | |
| 2798 goto retry; | |
| 2799 return read_atom (readcharfun, c, 0); | |
| 2800 } | |
| 2801 } | |
| 2802 } | |
| 2803 | |
| 2804 | |
| 2805 | |
| 2806 #define LEAD_INT 1 | |
| 2807 #define DOT_CHAR 2 | |
| 2808 #define TRAIL_INT 4 | |
| 2809 #define E_CHAR 8 | |
| 2810 #define EXP_INT 16 | |
| 2811 | |
| 2812 int | |
| 442 | 2813 isfloat_string (const char *cp) |
| 428 | 2814 { |
| 2815 int state = 0; | |
| 867 | 2816 const Ibyte *ucp = (const Ibyte *) cp; |
| 428 | 2817 |
| 2818 if (*ucp == '+' || *ucp == '-') | |
| 2819 ucp++; | |
| 2820 | |
| 2821 if (*ucp >= '0' && *ucp <= '9') | |
| 2822 { | |
| 2823 state |= LEAD_INT; | |
| 2824 while (*ucp >= '0' && *ucp <= '9') | |
| 2825 ucp++; | |
| 2826 } | |
| 2827 if (*ucp == '.') | |
| 2828 { | |
| 2829 state |= DOT_CHAR; | |
| 2830 ucp++; | |
| 2831 } | |
| 2832 if (*ucp >= '0' && *ucp <= '9') | |
| 2833 { | |
| 2834 state |= TRAIL_INT; | |
| 2835 while (*ucp >= '0' && *ucp <= '9') | |
| 2836 ucp++; | |
| 2837 } | |
| 2838 if (*ucp == 'e' || *ucp == 'E') | |
| 2839 { | |
| 2840 state |= E_CHAR; | |
| 2841 ucp++; | |
| 2842 if ((*ucp == '+') || (*ucp == '-')) | |
| 2843 ucp++; | |
| 2844 } | |
| 2845 | |
| 2846 if (*ucp >= '0' && *ucp <= '9') | |
| 2847 { | |
| 2848 state |= EXP_INT; | |
| 2849 while (*ucp >= '0' && *ucp <= '9') | |
| 2850 ucp++; | |
| 2851 } | |
| 2852 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t') || (*ucp == '\n') | |
| 2853 || (*ucp == '\r') || (*ucp == '\f')) | |
| 2854 && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) | |
| 2855 || state == (DOT_CHAR|TRAIL_INT) | |
| 2856 || state == (LEAD_INT|E_CHAR|EXP_INT) | |
| 2857 || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) | |
| 2858 || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
| 2859 } | |
| 1983 | 2860 |
| 2861 #ifdef HAVE_RATIO | |
| 2862 int | |
| 2863 isratio_string (const char *cp) | |
| 2864 { | |
| 2010 | 2865 /* Possible minus/plus sign */ |
| 2866 if (*cp == '-' || *cp == '+') | |
| 1983 | 2867 cp++; |
| 2868 | |
| 2869 /* Numerator */ | |
| 2870 if (*cp < '0' || *cp > '9') | |
| 2871 return 0; | |
| 2872 | |
| 2873 do { | |
| 2874 cp++; | |
| 2875 } while (*cp >= '0' && *cp <= '9'); | |
| 2876 | |
| 2877 /* Slash */ | |
| 2878 if (*cp++ != '/') | |
| 2879 return 0; | |
| 2880 | |
| 2881 /* Denominator */ | |
| 2882 if (*cp < '0' || *cp > '9') | |
| 2883 return 0; | |
| 2884 | |
| 2885 do { | |
| 2886 cp++; | |
| 2887 } while (*cp >= '0' && *cp <= '9'); | |
| 2888 | |
| 2889 return *cp == '\0' || *cp == ' ' || *cp =='\t' || *cp == '\n' || | |
| 2890 *cp == '\r' || *cp == '\f'; | |
| 2891 } | |
| 2892 #endif | |
| 428 | 2893 |
| 2894 static void * | |
| 2895 sequence_reader (Lisp_Object readcharfun, | |
| 867 | 2896 Ichar terminator, |
| 428 | 2897 void *state, |
| 2898 void * (*conser) (Lisp_Object readcharfun, | |
| 2899 void *state, Charcount len)) | |
| 2900 { | |
| 2901 Charcount len; | |
| 2902 | |
| 2903 for (len = 0; ; len++) | |
| 2904 { | |
| 867 | 2905 Ichar ch; |
| 428 | 2906 |
| 2907 QUIT; | |
| 2908 ch = reader_nextchar (readcharfun); | |
| 2909 | |
| 2910 if (ch == terminator) | |
| 2911 return state; | |
| 2912 else | |
| 2913 unreadchar (readcharfun, ch); | |
| 2914 #ifdef FEATUREP_SYNTAX | |
| 2915 if (ch == ']') | |
| 442 | 2916 read_syntax_error ("\"]\" in a list"); |
| 428 | 2917 else if (ch == ')') |
| 442 | 2918 read_syntax_error ("\")\" in a vector"); |
| 428 | 2919 #endif |
| 2920 state = ((conser) (readcharfun, state, len)); | |
| 2921 } | |
| 2922 } | |
| 2923 | |
| 2924 | |
| 2925 struct read_list_state | |
| 2926 { | |
| 2927 Lisp_Object head; | |
| 2928 Lisp_Object tail; | |
| 2929 int length; | |
| 2930 int allow_dotted_lists; | |
| 867 | 2931 Ichar terminator; |
| 428 | 2932 }; |
| 2933 | |
| 2934 static void * | |
| 2286 | 2935 read_list_conser (Lisp_Object readcharfun, void *state, Charcount UNUSED (len)) |
| 428 | 2936 { |
| 2937 struct read_list_state *s = (struct read_list_state *) state; | |
| 2938 Lisp_Object elt; | |
| 2939 | |
| 2940 elt = read1 (readcharfun); | |
| 2941 | |
| 2942 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2943 { | |
| 2944 Lisp_Object tem = elt; | |
| 867 | 2945 Ichar ch; |
| 428 | 2946 |
| 2947 elt = XCDR (elt); | |
| 853 | 2948 free_cons (tem); |
| 428 | 2949 tem = Qnil; |
| 2950 ch = XCHAR (elt); | |
| 2951 #ifdef FEATUREP_SYNTAX | |
| 2952 if (ch == s->terminator) /* deal with #+, #- reader macros */ | |
| 2953 { | |
| 2954 unreadchar (readcharfun, s->terminator); | |
| 2955 goto done; | |
| 2956 } | |
| 2957 else if (ch == ']') | |
| 442 | 2958 read_syntax_error ("']' in a list"); |
| 428 | 2959 else if (ch == ')') |
| 442 | 2960 read_syntax_error ("')' in a vector"); |
| 428 | 2961 else |
| 2962 #endif | |
| 2963 if (ch != '.') | |
| 563 | 2964 signal_error (Qinternal_error, "BUG! Internal reader error", elt); |
| 428 | 2965 else if (!s->allow_dotted_lists) |
| 442 | 2966 read_syntax_error ("\".\" in a vector"); |
| 428 | 2967 else |
| 2968 { | |
| 2969 if (!NILP (s->tail)) | |
| 2970 XCDR (s->tail) = read0 (readcharfun); | |
| 2971 else | |
| 2972 s->head = read0 (readcharfun); | |
| 2973 elt = read1 (readcharfun); | |
| 2974 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2975 { | |
| 2976 ch = XCHAR (XCDR (elt)); | |
| 853 | 2977 free_cons (elt); |
| 428 | 2978 if (ch == s->terminator) |
| 2979 { | |
| 2980 unreadchar (readcharfun, s->terminator); | |
| 2981 goto done; | |
| 2982 } | |
| 2983 } | |
| 442 | 2984 read_syntax_error (". in wrong context"); |
| 428 | 2985 } |
| 2986 } | |
| 2987 | |
| 2988 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 2989 if (s->length == 1 && s->allow_dotted_lists && EQ (XCAR (s->head), Qfset)) | |
| 2990 { | |
| 2991 if (CONSP (elt) && EQ (XCAR (elt), Qquote) && CONSP (XCDR (elt))) | |
| 2992 Vcurrent_compiled_function_annotation = XCAR (XCDR (elt)); | |
| 2993 else | |
| 2994 Vcurrent_compiled_function_annotation = elt; | |
| 2995 } | |
| 2996 #endif | |
| 2997 | |
| 2998 elt = Fcons (elt, Qnil); | |
| 2999 if (!NILP (s->tail)) | |
| 3000 XCDR (s->tail) = elt; | |
| 3001 else | |
| 3002 s->head = elt; | |
| 3003 s->tail = elt; | |
| 3004 done: | |
| 3005 s->length++; | |
| 3006 return s; | |
| 3007 } | |
| 3008 | |
| 3009 | |
| 814 | 3010 /* allow_dotted_lists means that something like (foo bar . baz) |
| 3011 is acceptable. If -1, means check for starting with defun | |
| 3012 and make structure pure. (not implemented, probably for very | |
| 3013 good reasons) | |
| 3014 | |
| 3015 If check_for_doc_references, look for (#$ . INT) doc references | |
| 3016 in the list and record if load_force_doc_strings is non-zero. | |
| 3017 (Such doc references will be destroyed during the loadup phase | |
| 3018 by replacing with Qzero, because Snarf-documentation will fill | |
| 3019 them in again.) | |
| 3020 | |
| 3021 WARNING: If you set this, you sure as hell better not call | |
| 3022 free_list() on the returned list here. | |
| 3023 */ | |
| 428 | 3024 |
| 3025 static Lisp_Object | |
| 3026 read_list (Lisp_Object readcharfun, | |
| 867 | 3027 Ichar terminator, |
| 428 | 3028 int allow_dotted_lists, |
| 3029 int check_for_doc_references) | |
| 3030 { | |
| 3031 struct read_list_state s; | |
| 3032 struct gcpro gcpro1, gcpro2; | |
| 3033 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3034 Lisp_Object old_compiled_function_annotation = | |
| 3035 Vcurrent_compiled_function_annotation; | |
| 3036 #endif | |
| 3037 | |
| 3038 s.head = Qnil; | |
| 3039 s.tail = Qnil; | |
| 3040 s.length = 0; | |
| 3041 s.allow_dotted_lists = allow_dotted_lists; | |
| 3042 s.terminator = terminator; | |
| 3043 GCPRO2 (s.head, s.tail); | |
| 3044 | |
| 3045 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3046 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3047 Vcurrent_compiled_function_annotation = old_compiled_function_annotation; | |
| 3048 #endif | |
| 3049 | |
| 3050 if ((purify_flag || load_force_doc_strings) && check_for_doc_references) | |
| 3051 { | |
| 3052 /* check now for any doc string references and record them | |
| 3053 for later. */ | |
| 3054 Lisp_Object tail; | |
| 3055 | |
| 3056 /* We might be dealing with an imperfect list so don't | |
| 3057 use LIST_LOOP */ | |
| 3058 for (tail = s.head; CONSP (tail); tail = XCDR (tail)) | |
| 3059 { | |
| 3060 Lisp_Object holding_cons = Qnil; | |
| 3061 | |
| 3062 { | |
| 3063 Lisp_Object elem = XCAR (tail); | |
| 3064 /* elem might be (#$ . INT) ... */ | |
| 3065 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3066 holding_cons = tail; | |
| 3067 /* or it might be (quote (#$ . INT)) i.e. | |
| 3068 (quote . ((#$ . INT) . nil)) in the case of | |
| 3069 `autoload' (autoload evaluates its arguments, while | |
| 3070 `defvar', `defun', etc. don't). */ | |
| 3071 if (CONSP (elem) && EQ (XCAR (elem), Qquote) | |
| 3072 && CONSP (XCDR (elem))) | |
| 3073 { | |
| 3074 elem = XCAR (XCDR (elem)); | |
| 3075 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3076 holding_cons = XCDR (XCAR (tail)); | |
| 3077 } | |
| 3078 } | |
| 3079 | |
| 3080 if (CONSP (holding_cons)) | |
| 3081 { | |
| 3082 if (purify_flag) | |
| 3083 { | |
| 3084 if (NILP (Vinternal_doc_file_name)) | |
| 3085 /* We have not yet called Snarf-documentation, so | |
| 3086 assume this file is described in the DOC file | |
| 3087 and Snarf-documentation will fill in the right | |
| 3088 value later. For now, replace the whole list | |
| 3089 with 0. */ | |
| 3090 XCAR (holding_cons) = Qzero; | |
| 3091 else | |
| 3092 /* We have already called Snarf-documentation, so | |
| 3093 make a relative file name for this file, so it | |
| 3094 can be found properly in the installed Lisp | |
| 3095 directory. We don't use Fexpand_file_name | |
| 3096 because that would make the directory absolute | |
| 3097 now. */ | |
| 3098 XCAR (XCAR (holding_cons)) = | |
| 3099 concat2 (build_string ("../lisp/"), | |
| 3100 Ffile_name_nondirectory | |
| 3101 (Vload_file_name_internal)); | |
| 3102 } | |
| 3103 else | |
| 3104 /* Not pure. Just add to Vload_force_doc_string_list, | |
| 3105 and the string will be filled in properly in | |
| 3106 load_force_doc_string_unwind(). */ | |
| 3107 Vload_force_doc_string_list = | |
| 3108 /* We pass the cons that holds the (#$ . INT) so we | |
| 3109 can modify it in-place. */ | |
| 3110 Fcons (holding_cons, Vload_force_doc_string_list); | |
| 3111 } | |
| 3112 } | |
| 3113 } | |
| 3114 | |
| 3115 UNGCPRO; | |
| 3116 return s.head; | |
| 3117 } | |
| 3118 | |
| 3119 static Lisp_Object | |
| 3120 read_vector (Lisp_Object readcharfun, | |
| 867 | 3121 Ichar terminator) |
| 428 | 3122 { |
| 3123 Lisp_Object tem; | |
| 3124 Lisp_Object *p; | |
| 3125 int len; | |
| 3126 int i; | |
| 3127 struct read_list_state s; | |
| 3128 struct gcpro gcpro1, gcpro2; | |
| 3129 | |
| 3130 s.head = Qnil; | |
| 3131 s.tail = Qnil; | |
| 3132 s.length = 0; | |
| 3133 s.allow_dotted_lists = 0; | |
| 3134 GCPRO2 (s.head, s.tail); | |
| 3135 | |
| 3136 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3137 | |
| 3138 UNGCPRO; | |
| 3139 tem = s.head; | |
| 3140 len = XINT (Flength (tem)); | |
| 3141 | |
| 814 | 3142 s.head = make_vector (len, Qnil); |
| 428 | 3143 |
| 3144 for (i = 0, p = &(XVECTOR_DATA (s.head)[0]); | |
| 3145 i < len; | |
| 3146 i++, p++) | |
| 3147 { | |
| 853 | 3148 Lisp_Object otem = tem; |
| 428 | 3149 tem = Fcar (tem); |
| 3150 *p = tem; | |
| 853 | 3151 tem = XCDR (otem); |
| 428 | 3152 free_cons (otem); |
| 3153 } | |
| 3154 return s.head; | |
| 3155 } | |
| 3156 | |
| 3157 static Lisp_Object | |
| 867 | 3158 read_compiled_function (Lisp_Object readcharfun, Ichar terminator) |
| 428 | 3159 { |
| 3160 /* Accept compiled functions at read-time so that we don't | |
| 3161 have to build them at load-time. */ | |
| 3162 Lisp_Object stuff; | |
| 3163 Lisp_Object make_byte_code_args[COMPILED_DOMAIN + 1]; | |
| 3164 struct gcpro gcpro1; | |
| 3165 int len; | |
| 3166 int iii; | |
| 3167 int saw_a_doc_ref = 0; | |
| 3168 | |
| 3169 /* Note: we tell read_list not to search for doc references | |
| 3170 because we need to handle the "doc reference" for the | |
| 3171 instructions and constants differently. */ | |
| 3172 stuff = read_list (readcharfun, terminator, 0, 0); | |
| 3173 len = XINT (Flength (stuff)); | |
| 3174 if (len < COMPILED_STACK_DEPTH + 1 || len > COMPILED_DOMAIN + 1) | |
| 3175 return | |
| 442 | 3176 continuable_read_syntax_error ("#[...] used with wrong number of elements"); |
| 428 | 3177 |
| 3178 for (iii = 0; CONSP (stuff); iii++) | |
| 3179 { | |
| 853 | 3180 Lisp_Object victim = stuff; |
| 428 | 3181 make_byte_code_args[iii] = Fcar (stuff); |
| 3182 if ((purify_flag || load_force_doc_strings) | |
| 3183 && CONSP (make_byte_code_args[iii]) | |
| 3184 && EQ (XCAR (make_byte_code_args[iii]), Vload_file_name_internal)) | |
| 3185 { | |
| 3186 if (purify_flag && iii == COMPILED_DOC_STRING) | |
| 3187 { | |
| 3188 /* same as in read_list(). */ | |
| 3189 if (NILP (Vinternal_doc_file_name)) | |
| 3190 make_byte_code_args[iii] = Qzero; | |
| 3191 else | |
| 3192 XCAR (make_byte_code_args[iii]) = | |
| 3193 concat2 (build_string ("../lisp/"), | |
| 3194 Ffile_name_nondirectory | |
| 3195 (Vload_file_name_internal)); | |
| 3196 } | |
| 3197 else | |
| 3198 saw_a_doc_ref = 1; | |
| 3199 } | |
| 3200 stuff = Fcdr (stuff); | |
| 3201 free_cons (victim); | |
| 3202 } | |
| 3203 GCPRO1 (make_byte_code_args[0]); | |
| 3204 gcpro1.nvars = len; | |
| 3205 | |
| 3206 /* v18 or v19 bytecode file. Need to Ebolify. */ | |
| 3207 if (load_byte_code_version < 20 && VECTORP (make_byte_code_args[2])) | |
| 3208 ebolify_bytecode_constants (make_byte_code_args[2]); | |
| 3209 | |
| 3210 /* make-byte-code looks at purify_flag, which should have the same | |
| 3211 * value as our "read-pure" argument */ | |
| 3212 stuff = Fmake_byte_code (len, make_byte_code_args); | |
| 3213 XCOMPILED_FUNCTION (stuff)->flags.ebolified = (load_byte_code_version < 20); | |
| 3214 if (saw_a_doc_ref) | |
| 3215 Vload_force_doc_string_list = Fcons (stuff, Vload_force_doc_string_list); | |
| 3216 UNGCPRO; | |
| 3217 return stuff; | |
| 3218 } | |
| 3219 | |
| 3220 | |
| 3221 | |
| 3222 void | |
| 3223 init_lread (void) | |
| 3224 { | |
| 3225 Vvalues = Qnil; | |
| 3226 | |
| 3227 load_in_progress = 0; | |
| 3228 | |
| 3229 Vload_descriptor_list = Qnil; | |
| 3230 | |
| 3231 /* kludge: locate-file does not work for a null load-path, even if | |
| 3232 the file name is absolute. */ | |
| 3233 | |
| 3234 Vload_path = Fcons (build_string (""), Qnil); | |
| 3235 | |
| 3236 /* This used to get initialized in init_lread because all streams | |
| 3237 got closed when dumping occurs. This is no longer true -- | |
| 3238 Vread_buffer_stream is a resizing output stream, and there is no | |
| 3239 reason to close it at dump-time. | |
| 3240 | |
| 3241 Vread_buffer_stream is set to Qnil in vars_of_lread, and this | |
| 3242 will initialize it only once, at dump-time. */ | |
| 3243 if (NILP (Vread_buffer_stream)) | |
| 3244 Vread_buffer_stream = make_resizing_buffer_output_stream (); | |
| 3245 | |
| 3246 Vload_force_doc_string_list = Qnil; | |
| 3247 } | |
| 3248 | |
| 3249 void | |
| 3250 syms_of_lread (void) | |
| 3251 { | |
| 3252 DEFSUBR (Fread); | |
| 3253 DEFSUBR (Fread_from_string); | |
| 3254 DEFSUBR (Fload_internal); | |
| 3255 DEFSUBR (Flocate_file); | |
| 3256 DEFSUBR (Flocate_file_clear_hashing); | |
| 3257 DEFSUBR (Feval_buffer); | |
| 3258 DEFSUBR (Feval_region); | |
| 3259 | |
| 563 | 3260 DEFSYMBOL (Qstandard_input); |
| 3261 DEFSYMBOL (Qread_char); | |
| 3262 DEFSYMBOL (Qload); | |
| 1292 | 3263 DEFSYMBOL (Qload_internal); |
| 563 | 3264 DEFSYMBOL (Qfset); |
| 428 | 3265 |
| 3266 #ifdef LISP_BACKQUOTES | |
| 563 | 3267 DEFSYMBOL (Qbackquote); |
| 428 | 3268 defsymbol (&Qbacktick, "`"); |
| 3269 defsymbol (&Qcomma, ","); | |
| 3270 defsymbol (&Qcomma_at, ",@"); | |
| 3271 defsymbol (&Qcomma_dot, ",."); | |
| 3272 #endif | |
| 3273 | |
| 563 | 3274 DEFSYMBOL (Qexists); |
| 3275 DEFSYMBOL (Qreadable); | |
| 3276 DEFSYMBOL (Qwritable); | |
| 3277 DEFSYMBOL (Qexecutable); | |
| 428 | 3278 } |
| 3279 | |
| 3280 void | |
| 3281 structure_type_create (void) | |
| 3282 { | |
| 3283 the_structure_type_dynarr = Dynarr_new (structure_type); | |
| 3284 } | |
| 3285 | |
| 3286 void | |
| 3287 reinit_vars_of_lread (void) | |
| 3288 { | |
| 3289 Vread_buffer_stream = Qnil; | |
| 3290 staticpro_nodump (&Vread_buffer_stream); | |
| 3291 } | |
| 3292 | |
| 3293 void | |
| 3294 vars_of_lread (void) | |
| 3295 { | |
| 3296 DEFVAR_LISP ("values", &Vvalues /* | |
| 3297 List of values of all expressions which were read, evaluated and printed. | |
| 3298 Order is reverse chronological. | |
| 3299 */ ); | |
| 3300 | |
| 3301 DEFVAR_LISP ("standard-input", &Vstandard_input /* | |
| 3302 Stream for read to get input from. | |
| 3303 See documentation of `read' for possible values. | |
| 3304 */ ); | |
| 3305 Vstandard_input = Qt; | |
| 3306 | |
| 3307 DEFVAR_LISP ("load-path", &Vload_path /* | |
| 3308 *List of directories to search for files to load. | |
| 3309 Each element is a string (directory name) or nil (try default directory). | |
| 3310 | |
| 3311 Note that the elements of this list *may not* begin with "~", so you must | |
| 3312 call `expand-file-name' on them before adding them to this list. | |
| 3313 | |
| 3314 Initialized based on EMACSLOADPATH environment variable, if any, | |
| 3315 otherwise to default specified in by file `paths.h' when XEmacs was built. | |
| 3316 If there were no paths specified in `paths.h', then XEmacs chooses a default | |
| 3317 value for this variable by looking around in the file-system near the | |
| 3318 directory in which the XEmacs executable resides. | |
| 3319 */ ); | |
| 3320 Vload_path = Qnil; | |
| 3321 | |
| 3322 /* xxxDEFVAR_LISP ("dump-load-path", &Vdump_load_path, | |
| 3323 "*Location of lisp files to be used when dumping ONLY."); */ | |
| 3324 | |
| 3325 DEFVAR_BOOL ("load-in-progress", &load_in_progress /* | |
| 3326 Non-nil iff inside of `load'. | |
| 3327 */ ); | |
| 3328 | |
| 2548 | 3329 DEFVAR_LISP ("load-suppress-alist", &Vload_suppress_alist /* |
| 3330 An alist of expressions controlling whether particular files can be loaded. | |
| 3331 Each element looks like (FILENAME EXPR). | |
| 3332 FILENAME should be a full pathname, but without the .el suffix. | |
| 3333 When `load' is run and is about to load the specified file, it evaluates | |
| 3334 the form to determine if the file can be loaded. | |
| 3335 This variable is normally initialized automatically. | |
| 3336 */ ); | |
| 3337 Vload_suppress_alist = Qnil; | |
| 3338 | |
| 428 | 3339 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist /* |
| 3340 An alist of expressions to be evalled when particular files are loaded. | |
| 3341 Each element looks like (FILENAME FORMS...). | |
| 3342 When `load' is run and the file-name argument is FILENAME, | |
| 3343 the FORMS in the corresponding element are executed at the end of loading. | |
| 3344 | |
| 3345 FILENAME must match exactly! Normally FILENAME is the name of a library, | |
| 3346 with no directory specified, since that is how `load' is normally called. | |
| 3347 An error in FORMS does not undo the load, | |
| 3348 but does prevent execution of the rest of the FORMS. | |
| 3349 */ ); | |
| 3350 Vafter_load_alist = Qnil; | |
| 3351 | |
| 3352 DEFVAR_BOOL ("load-warn-when-source-newer", &load_warn_when_source_newer /* | |
| 3353 *Whether `load' should check whether the source is newer than the binary. | |
| 3354 If this variable is true, then when a `.elc' file is being loaded and the | |
| 3355 corresponding `.el' is newer, a warning message will be printed. | |
| 3356 */ ); | |
| 1261 | 3357 load_warn_when_source_newer = 1; |
| 428 | 3358 |
| 3359 DEFVAR_BOOL ("load-warn-when-source-only", &load_warn_when_source_only /* | |
| 3360 *Whether `load' should warn when loading a `.el' file instead of an `.elc'. | |
| 3361 If this variable is true, then when `load' is called with a filename without | |
| 3362 an extension, and the `.elc' version doesn't exist but the `.el' version does, | |
| 3363 then a message will be printed. If an explicit extension is passed to `load', | |
| 3364 no warning will be printed. | |
| 3365 */ ); | |
| 3366 load_warn_when_source_only = 0; | |
| 3367 | |
| 3368 DEFVAR_BOOL ("load-ignore-elc-files", &load_ignore_elc_files /* | |
| 3369 *Whether `load' should ignore `.elc' files when a suffix is not given. | |
| 3370 This is normally used only to bootstrap the `.elc' files when building XEmacs. | |
| 3371 */ ); | |
| 3372 load_ignore_elc_files = 0; | |
| 3373 | |
| 1123 | 3374 DEFVAR_BOOL ("load-ignore-out-of-date-elc-files", |
| 3375 &load_ignore_out_of_date_elc_files /* | |
| 3376 *Whether `load' should ignore out-of-date `.elc' files when no suffix is given. | |
| 3377 This is normally used when compiling packages of elisp files that may have | |
| 3378 complex dependencies. Ignoring all elc files with `load-ignore-elc-files' | |
| 3379 would also be safe, but much slower. | |
| 3380 */ ); | |
| 3381 load_ignore_out_of_date_elc_files = 0; | |
| 3382 | |
| 3383 DEFVAR_BOOL ("load-always-display-messages", | |
| 3384 &load_always_display_messages /* | |
| 3385 *Whether `load' should always display loading messages. | |
| 3386 If this is true, every file loaded will be shown, regardless of the setting | |
| 3387 of the NOMESSAGE parameter, and even when files are loaded indirectly, e.g. | |
| 2857 | 3388 due to `require'. |
| 1123 | 3389 */ ); |
| 3390 load_always_display_messages = 0; | |
| 3391 | |
| 3392 DEFVAR_BOOL ("load-show-full-path-in-messages", | |
| 3393 &load_show_full_path_in_messages /* | |
| 3394 *Whether `load' should show the full path in all loading messages. | |
| 3395 */ ); | |
| 3396 load_show_full_path_in_messages = 0; | |
| 3397 | |
| 428 | 3398 #ifdef LOADHIST |
| 3399 DEFVAR_LISP ("load-history", &Vload_history /* | |
| 3400 Alist mapping source file names to symbols and features. | |
| 3401 Each alist element is a list that starts with a file name, | |
| 3402 except for one element (optional) that starts with nil and describes | |
| 3403 definitions evaluated from buffers not visiting files. | |
| 3404 The remaining elements of each list are symbols defined as functions | |
| 3405 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'. | |
| 3406 */ ); | |
| 3407 Vload_history = Qnil; | |
| 3408 | |
| 3409 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list /* | |
| 3410 Used for internal purposes by `load'. | |
| 3411 */ ); | |
| 3412 Vcurrent_load_list = Qnil; | |
| 3413 #endif | |
| 3414 | |
| 3415 DEFVAR_LISP ("load-file-name", &Vload_file_name /* | |
| 3416 Full name of file being loaded by `load'. | |
| 3417 */ ); | |
| 3418 Vload_file_name = Qnil; | |
| 3419 | |
| 3420 DEFVAR_LISP ("load-read-function", &Vload_read_function /* | |
| 3421 Function used by `load' and `eval-region' for reading expressions. | |
| 3422 The default is nil, which means use the function `read'. | |
| 3423 */ ); | |
| 3424 Vload_read_function = Qnil; | |
| 3425 | |
| 3426 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings /* | |
| 3427 Non-nil means `load' should force-load all dynamic doc strings. | |
| 3428 This is useful when the file being loaded is a temporary copy. | |
| 3429 */ ); | |
| 3430 load_force_doc_strings = 0; | |
| 3431 | |
| 3432 /* See read_escape(). */ | |
| 3433 #if 0 | |
| 3434 /* Used to be named `puke-on-fsf-keys' */ | |
| 3435 DEFVAR_BOOL ("fail-on-bucky-bit-character-escapes", | |
| 3436 &fail_on_bucky_bit_character_escapes /* | |
| 3437 Whether `read' should signal an error when it encounters unsupported | |
| 3438 character escape syntaxes or just read them incorrectly. | |
| 3439 */ ); | |
| 3440 fail_on_bucky_bit_character_escapes = 0; | |
| 3441 #endif | |
| 3442 | |
| 3443 /* This must be initialized in init_lread otherwise it may start out | |
| 3444 with values saved when the image is dumped. */ | |
| 3445 staticpro (&Vload_descriptor_list); | |
| 3446 | |
| 3447 /* Initialized in init_lread. */ | |
| 3448 staticpro (&Vload_force_doc_string_list); | |
| 3449 | |
| 3450 Vload_file_name_internal = Qnil; | |
| 3451 staticpro (&Vload_file_name_internal); | |
| 3452 | |
| 3453 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3454 Vcurrent_compiled_function_annotation = Qnil; | |
| 3455 staticpro (&Vcurrent_compiled_function_annotation); | |
| 3456 #endif | |
| 3457 | |
| 3458 /* So that early-early stuff will work */ | |
| 1292 | 3459 Ffset (Qload, Qload_internal); |
| 428 | 3460 |
| 3461 #ifdef FEATUREP_SYNTAX | |
| 563 | 3462 DEFSYMBOL (Qfeaturep); |
| 771 | 3463 Fprovide (intern ("xemacs")); |
| 428 | 3464 #ifdef INFODOCK |
| 771 | 3465 Fprovide (intern ("infodock")); |
| 428 | 3466 #endif /* INFODOCK */ |
| 3467 #endif /* FEATUREP_SYNTAX */ | |
| 3468 | |
| 3469 #ifdef LISP_BACKQUOTES | |
| 3470 old_backquote_flag = new_backquote_flag = 0; | |
| 3471 #endif | |
| 3472 | |
| 3473 #ifdef I18N3 | |
| 3474 Vfile_domain = Qnil; | |
| 3475 #endif | |
| 3476 | |
| 3477 Vread_objects = Qnil; | |
| 3478 staticpro (&Vread_objects); | |
| 3479 | |
| 3480 Vlocate_file_hash_table = make_lisp_hash_table (200, | |
| 3481 HASH_TABLE_NON_WEAK, | |
| 3482 HASH_TABLE_EQUAL); | |
| 3483 staticpro (&Vlocate_file_hash_table); | |
| 3484 #ifdef DEBUG_XEMACS | |
| 3485 symbol_value (XSYMBOL (intern ("Vlocate-file-hash-table"))) | |
| 3486 = Vlocate_file_hash_table; | |
| 3487 #endif | |
| 3488 } |