Mercurial > hg > xemacs-beta
annotate src/lread.c @ 4439:f4eb31866c38
Fix reader crash.
2008-03-15 Michael Sperber <mike@xemacs.org>
* lread.c (read1): Signal an error on ?\<newline>, thus preventing
an assertion failure higher up.
| author | Mike Sperber <sperber@deinprogramm.de> |
|---|---|
| date | Sat, 15 Mar 2008 12:21:11 +0100 |
| parents | d9eb5ea14f65 |
| children | ac6231e0c1df |
| 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 | |
| 747 /* Now determine what sort of ELC file we're reading in. */ | |
| 853 | 748 internal_bind_int (&load_byte_code_version, load_byte_code_version); |
| 428 | 749 if (reading_elc) |
| 750 { | |
| 751 char elc_header[8]; | |
| 752 int num_read; | |
| 753 | |
| 754 num_read = Lstream_read (XLSTREAM (lispstream), elc_header, 8); | |
| 755 if (num_read < 8 | |
| 756 || strncmp (elc_header, ";ELC", 4)) | |
| 757 { | |
| 758 /* Huh? Probably not a valid ELC file. */ | |
| 759 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 760 Lstream_unread (XLSTREAM (lispstream), elc_header, num_read); | |
| 761 } | |
| 762 else | |
| 763 load_byte_code_version = elc_header[4]; | |
| 764 } | |
| 765 else | |
| 766 load_byte_code_version = 100; /* no Ebolification needed */ | |
| 767 | |
| 768 readevalloop (lispstream, file, Feval, 0); | |
| 769 if (!NILP (used_codesys)) | |
| 770 Fset (used_codesys, | |
| 771 XCODING_SYSTEM_NAME | |
| 771 | 772 (coding_stream_detected_coding_system (XLSTREAM (lispstream)))); |
| 773 unbind_to (speccount); | |
| 428 | 774 |
| 775 NUNGCPRO; | |
| 776 } | |
| 777 | |
| 778 { | |
| 779 Lisp_Object tem; | |
| 780 /* #### Disgusting kludge */ | |
| 781 /* Run any load-hooks for this file. */ | |
| 782 /* #### An even more disgusting kludge. There is horrible code */ | |
| 783 /* that is relying on the fact that dumped lisp files are found */ | |
| 784 /* via `load-path' search. */ | |
| 785 Lisp_Object name = file; | |
| 786 | |
| 1123 | 787 if (!NILP (Ffile_name_absolute_p (file))) |
| 788 name = Ffile_name_nondirectory (file); | |
| 428 | 789 |
| 1261 | 790 tem = Fassoc (name, Vafter_load_alist); |
| 428 | 791 if (!NILP (tem)) |
| 792 { | |
| 793 struct gcpro ngcpro1; | |
| 794 | |
| 795 NGCPRO1 (tem); | |
| 796 /* Use eval so that errors give a semi-meaningful backtrace. --Stig */ | |
| 797 tem = Fcons (Qprogn, Fcdr (tem)); | |
| 798 Feval (tem); | |
| 799 NUNGCPRO; | |
| 800 } | |
| 801 } | |
| 802 | |
| 803 if (!noninteractive) | |
| 804 PRINT_LOADING_MESSAGE ("done"); | |
| 805 | |
| 1292 | 806 retval = Qt; |
| 807 done: | |
| 808 PROFILE_RECORD_EXITING_SECTION (Qload_internal); | |
| 428 | 809 UNGCPRO; |
| 1292 | 810 return retval; |
| 428 | 811 } |
| 812 | |
| 813 | |
| 814 /* ------------------------------- */ | |
| 815 /* locate_file */ | |
| 816 /* ------------------------------- */ | |
| 817 | |
| 818 static int | |
| 819 decode_mode_1 (Lisp_Object mode) | |
| 820 { | |
| 821 if (EQ (mode, Qexists)) | |
| 822 return F_OK; | |
| 823 else if (EQ (mode, Qexecutable)) | |
| 824 return X_OK; | |
| 825 else if (EQ (mode, Qwritable)) | |
| 826 return W_OK; | |
| 827 else if (EQ (mode, Qreadable)) | |
| 828 return R_OK; | |
| 829 else if (INTP (mode)) | |
| 830 { | |
| 831 check_int_range (XINT (mode), 0, 7); | |
| 832 return XINT (mode); | |
| 833 } | |
| 834 else | |
| 563 | 835 invalid_argument ("Invalid value", mode); |
| 428 | 836 return 0; /* unreached */ |
| 837 } | |
| 838 | |
| 839 static int | |
| 840 decode_mode (Lisp_Object mode) | |
| 841 { | |
| 842 if (NILP (mode)) | |
| 843 return R_OK; | |
| 844 else if (CONSP (mode)) | |
| 845 { | |
| 846 int mask = 0; | |
| 2367 | 847 EXTERNAL_LIST_LOOP_2 (elt, mode) |
| 848 mask |= decode_mode_1 (elt); | |
| 428 | 849 return mask; |
| 850 } | |
| 851 else | |
| 852 return decode_mode_1 (mode); | |
| 853 } | |
| 854 | |
| 855 DEFUN ("locate-file", Flocate_file, 2, 4, 0, /* | |
| 856 Search for FILENAME through PATH-LIST. | |
| 857 | |
| 858 If SUFFIXES is non-nil, it should be a list of suffixes to append to | |
| 859 file name when searching. | |
| 860 | |
| 861 If MODE is non-nil, it should be a symbol or a list of symbol representing | |
| 862 requirements. Allowed symbols are `exists', `executable', `writable', and | |
| 863 `readable'. If MODE is nil, it defaults to `readable'. | |
| 864 | |
| 2548 | 865 Filenames are checked against `load-suppress-alist' to determine if they |
| 866 should be ignored. | |
| 867 | |
| 428 | 868 `locate-file' keeps hash tables of the directories it searches through, |
| 869 in order to speed things up. It tries valiantly to not get confused in | |
| 870 the face of a changing and unpredictable environment, but can occasionally | |
| 871 get tripped up. In this case, you will have to call | |
| 872 `locate-file-clear-hashing' to get it back on track. See that function | |
| 873 for details. | |
| 874 */ | |
| 875 (filename, path_list, suffixes, mode)) | |
| 876 { | |
| 877 /* This function can GC */ | |
| 878 Lisp_Object tp; | |
| 879 | |
| 880 CHECK_STRING (filename); | |
| 881 | |
| 882 if (LISTP (suffixes)) | |
| 883 { | |
| 2367 | 884 EXTERNAL_LIST_LOOP_2 (elt, suffixes) |
| 885 CHECK_STRING (elt); | |
| 428 | 886 } |
| 887 else | |
| 888 CHECK_STRING (suffixes); | |
| 889 | |
| 890 locate_file (path_list, filename, suffixes, &tp, decode_mode (mode)); | |
| 891 return tp; | |
| 892 } | |
| 893 | |
| 894 /* Recalculate the hash table for the given string. DIRECTORY should | |
| 895 better have been through Fexpand_file_name() by now. */ | |
| 896 | |
| 897 static Lisp_Object | |
| 898 locate_file_refresh_hashing (Lisp_Object directory) | |
| 899 { | |
| 900 Lisp_Object hash = | |
| 771 | 901 make_directory_hash_table (XSTRING_DATA (directory)); |
| 428 | 902 |
| 903 if (!NILP (hash)) | |
| 904 Fputhash (directory, hash, Vlocate_file_hash_table); | |
| 905 return hash; | |
| 906 } | |
| 907 | |
| 908 /* find the hash table for the given directory, recalculating if necessary */ | |
| 909 | |
| 910 static Lisp_Object | |
| 911 locate_file_find_directory_hash_table (Lisp_Object directory) | |
| 912 { | |
| 913 Lisp_Object hash = Fgethash (directory, Vlocate_file_hash_table, Qnil); | |
| 914 if (NILP (hash)) | |
| 915 return locate_file_refresh_hashing (directory); | |
| 916 else | |
| 917 return hash; | |
| 918 } | |
| 919 | |
| 920 /* The SUFFIXES argument in any of the locate_file* functions can be | |
| 921 nil, a list, or a string (for backward compatibility), with the | |
| 922 following semantics: | |
| 923 | |
| 924 a) nil - no suffix, just search for file name intact | |
| 925 (semantically different from "empty suffix list", which | |
| 926 would be meaningless.) | |
| 927 b) list - list of suffixes to append to file name. Each of these | |
| 928 must be a string. | |
| 929 c) string - colon-separated suffixes to append to file name (backward | |
| 930 compatibility). | |
| 931 | |
| 932 All of this got hairy, so I decided to use a mapper. Calling a | |
| 933 function for each suffix shouldn't slow things down, since | |
| 934 locate_file is rarely called with enough suffixes for funcalls to | |
| 935 make any difference. */ | |
| 936 | |
| 937 /* Map FUN over SUFFIXES, as described above. FUN will be called with a | |
| 938 char * containing the current file name, and ARG. Mapping stops when | |
| 939 FUN returns non-zero. */ | |
| 940 static void | |
| 941 locate_file_map_suffixes (Lisp_Object filename, Lisp_Object suffixes, | |
| 867 | 942 int (*fun) (Ibyte *, void *), |
| 428 | 943 void *arg) |
| 944 { | |
| 945 /* This function can GC */ | |
| 867 | 946 Ibyte *fn; |
| 428 | 947 int fn_len, max; |
| 948 | |
| 949 /* Calculate maximum size of any filename made from | |
| 950 this path element/specified file name and any possible suffix. */ | |
| 951 if (CONSP (suffixes)) | |
| 952 { | |
| 953 /* We must traverse the list, so why not do it right. */ | |
| 954 Lisp_Object tail; | |
| 955 max = 0; | |
| 956 LIST_LOOP (tail, suffixes) | |
| 957 { | |
| 958 if (XSTRING_LENGTH (XCAR (tail)) > max) | |
| 959 max = XSTRING_LENGTH (XCAR (tail)); | |
| 960 } | |
| 961 } | |
| 962 else if (NILP (suffixes)) | |
| 963 max = 0; | |
| 964 else | |
| 965 /* Just take the easy way out */ | |
| 966 max = XSTRING_LENGTH (suffixes); | |
| 967 | |
| 968 fn_len = XSTRING_LENGTH (filename); | |
| 2367 | 969 fn = alloca_ibytes (max + fn_len + 1); |
| 771 | 970 memcpy (fn, XSTRING_DATA (filename), fn_len); |
| 428 | 971 |
| 972 /* Loop over suffixes. */ | |
| 973 if (!STRINGP (suffixes)) | |
| 974 { | |
| 975 if (NILP (suffixes)) | |
| 976 { | |
| 977 /* Case a) discussed in the comment above. */ | |
| 978 fn[fn_len] = 0; | |
| 979 if ((*fun) (fn, arg)) | |
| 980 return; | |
| 981 } | |
| 982 else | |
| 983 { | |
| 984 /* Case b) */ | |
| 985 Lisp_Object tail; | |
| 986 LIST_LOOP (tail, suffixes) | |
| 987 { | |
| 988 memcpy (fn + fn_len, XSTRING_DATA (XCAR (tail)), | |
| 989 XSTRING_LENGTH (XCAR (tail))); | |
| 990 fn[fn_len + XSTRING_LENGTH (XCAR (tail))] = 0; | |
| 991 if ((*fun) (fn, arg)) | |
| 992 return; | |
| 993 } | |
| 994 } | |
| 995 } | |
| 996 else | |
| 997 { | |
| 998 /* Case c) */ | |
| 867 | 999 const Ibyte *nsuffix = XSTRING_DATA (suffixes); |
| 428 | 1000 |
| 1001 while (1) | |
| 1002 { | |
| 867 | 1003 Ibyte *esuffix = qxestrchr (nsuffix, ':'); |
| 771 | 1004 Bytecount lsuffix = esuffix ? esuffix - nsuffix : |
| 1005 qxestrlen (nsuffix); | |
| 428 | 1006 |
| 1007 /* Concatenate path element/specified name with the suffix. */ | |
| 771 | 1008 qxestrncpy (fn + fn_len, nsuffix, lsuffix); |
| 428 | 1009 fn[fn_len + lsuffix] = 0; |
| 1010 | |
| 1011 if ((*fun) (fn, arg)) | |
| 1012 return; | |
| 1013 | |
| 1014 /* Advance to next suffix. */ | |
| 1015 if (esuffix == 0) | |
| 1016 break; | |
| 1017 nsuffix += lsuffix + 1; | |
| 1018 } | |
| 1019 } | |
| 1020 } | |
| 1021 | |
| 771 | 1022 struct locate_file_in_directory_mapper_closure |
| 1023 { | |
| 428 | 1024 int fd; |
| 1025 Lisp_Object *storeptr; | |
| 1026 int mode; | |
| 1027 }; | |
| 1028 | |
| 1123 | 1029 /* open() or access() a file to be returned by locate_file(). if |
| 1030 ACCESS_MODE >= 0, do an access() with that mode, else open(). Does | |
| 1031 various magic, e.g. opening the file read-only and binary and setting | |
| 1032 the close-on-exec flag on the file. */ | |
| 1033 | |
| 1034 static int | |
| 1035 locate_file_open_or_access_file (Ibyte *fn, int access_mode) | |
| 1036 { | |
| 1037 int val; | |
| 1038 | |
| 1039 /* Check that we can access or open it. */ | |
| 1040 if (access_mode >= 0) | |
| 1041 val = qxe_access (fn, access_mode); | |
| 1042 else | |
| 1043 { | |
| 1044 val = qxe_open (fn, O_RDONLY | OPEN_BINARY, 0); | |
| 1045 | |
| 1046 #ifndef WIN32_NATIVE | |
| 1047 if (val >= 0) | |
| 1048 /* If we actually opened the file, set close-on-exec flag | |
| 1049 on the new descriptor so that subprocesses can't whack | |
| 1050 at it. */ | |
| 1051 (void) fcntl (val, F_SETFD, FD_CLOEXEC); | |
| 1052 #endif | |
| 1053 } | |
| 1054 | |
| 1055 return val; | |
| 1056 } | |
| 1057 | |
| 428 | 1058 static int |
| 867 | 1059 locate_file_in_directory_mapper (Ibyte *fn, void *arg) |
| 428 | 1060 { |
| 1061 struct locate_file_in_directory_mapper_closure *closure = | |
| 771 | 1062 (struct locate_file_in_directory_mapper_closure *) arg; |
| 428 | 1063 struct stat st; |
| 1064 | |
| 1065 /* Ignore file if it's a directory. */ | |
| 771 | 1066 if (qxe_stat (fn, &st) >= 0 |
| 428 | 1067 && (st.st_mode & S_IFMT) != S_IFDIR) |
| 1068 { | |
| 1069 /* Check that we can access or open it. */ | |
| 1123 | 1070 closure->fd = locate_file_open_or_access_file (fn, closure->mode); |
| 428 | 1071 |
| 1072 if (closure->fd >= 0) | |
| 1073 { | |
| 2548 | 1074 if (!check_if_suppressed (fn, Qnil)) |
| 1075 { | |
| 1076 /* We succeeded; return this descriptor and filename. */ | |
| 1077 if (closure->storeptr) | |
| 1078 *closure->storeptr = build_intstring (fn); | |
| 1079 | |
| 1080 return 1; | |
| 1081 } | |
| 428 | 1082 } |
| 1083 } | |
| 1084 /* Keep mapping. */ | |
| 1085 return 0; | |
| 1086 } | |
| 1087 | |
| 1088 | |
| 1089 /* look for STR in PATH, optionally adding SUFFIXES. DIRECTORY need | |
| 1090 not have been expanded. */ | |
| 1091 | |
| 1092 static int | |
| 1093 locate_file_in_directory (Lisp_Object directory, Lisp_Object str, | |
| 1094 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1095 int mode) | |
| 1096 { | |
| 1097 /* This function can GC */ | |
| 1098 struct locate_file_in_directory_mapper_closure closure; | |
| 1099 Lisp_Object filename = Qnil; | |
| 1100 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 1101 | |
| 1102 GCPRO3 (directory, str, filename); | |
| 1103 | |
| 1104 filename = Fexpand_file_name (str, directory); | |
| 1105 if (NILP (filename) || NILP (Ffile_name_absolute_p (filename))) | |
| 1106 /* If there are non-absolute elts in PATH (eg ".") */ | |
| 1107 /* Of course, this could conceivably lose if luser sets | |
| 1108 default-directory to be something non-absolute ... */ | |
| 1109 { | |
| 1110 if (NILP (filename)) | |
| 1111 /* NIL means current directory */ | |
| 1112 filename = current_buffer->directory; | |
| 1113 else | |
| 1114 filename = Fexpand_file_name (filename, | |
| 1115 current_buffer->directory); | |
| 1116 if (NILP (Ffile_name_absolute_p (filename))) | |
| 1117 { | |
| 1118 /* Give up on this directory! */ | |
| 1119 UNGCPRO; | |
| 1120 return -1; | |
| 1121 } | |
| 1122 } | |
| 1123 | |
| 1124 closure.fd = -1; | |
| 1125 closure.storeptr = storeptr; | |
| 1126 closure.mode = mode; | |
| 1127 | |
| 771 | 1128 locate_file_map_suffixes (filename, suffixes, |
| 1129 locate_file_in_directory_mapper, | |
| 428 | 1130 &closure); |
| 1131 | |
| 1132 UNGCPRO; | |
| 1133 return closure.fd; | |
| 1134 } | |
| 1135 | |
| 1136 /* do the same as locate_file() but don't use any hash tables. */ | |
| 1137 | |
| 1138 static int | |
| 1139 locate_file_without_hash (Lisp_Object path, Lisp_Object str, | |
| 1140 Lisp_Object suffixes, Lisp_Object *storeptr, | |
| 1141 int mode) | |
| 1142 { | |
| 1143 /* This function can GC */ | |
| 1144 int absolute = !NILP (Ffile_name_absolute_p (str)); | |
| 1145 | |
| 2367 | 1146 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1147 { |
| 2367 | 1148 int val = locate_file_in_directory (elt, str, suffixes, storeptr, |
| 428 | 1149 mode); |
| 1150 if (val >= 0) | |
| 1151 return val; | |
| 1152 if (absolute) | |
| 1153 break; | |
| 1154 } | |
| 1155 return -1; | |
| 1156 } | |
| 1157 | |
| 1158 static int | |
| 867 | 1159 locate_file_construct_suffixed_files_mapper (Ibyte *fn, void *arg) |
| 428 | 1160 { |
| 771 | 1161 Lisp_Object *tail = (Lisp_Object *) arg; |
| 1162 *tail = Fcons (build_intstring (fn), *tail); | |
| 428 | 1163 return 0; |
| 1164 } | |
| 1165 | |
| 1166 /* Construct a list of all files to search for. | |
| 1167 It makes sense to have this despite locate_file_map_suffixes() | |
| 1168 because we need Lisp strings to access the hash-table, and it would | |
| 1169 be inefficient to create them on the fly, again and again for each | |
| 1170 path component. See locate_file(). */ | |
| 1171 | |
| 1172 static Lisp_Object | |
| 1173 locate_file_construct_suffixed_files (Lisp_Object filename, | |
| 1174 Lisp_Object suffixes) | |
| 1175 { | |
| 1176 Lisp_Object tail = Qnil; | |
| 1177 struct gcpro gcpro1; | |
| 1178 GCPRO1 (tail); | |
| 1179 | |
| 1180 locate_file_map_suffixes (filename, suffixes, | |
| 1181 locate_file_construct_suffixed_files_mapper, | |
| 1182 &tail); | |
| 1183 | |
| 1184 UNGCPRO; | |
| 1185 return Fnreverse (tail); | |
| 1186 } | |
| 1187 | |
| 1188 DEFUN ("locate-file-clear-hashing", Flocate_file_clear_hashing, 1, 1, 0, /* | |
| 1189 Clear the hash records for the specified list of directories. | |
| 1190 `locate-file' uses a hashing scheme to speed lookup, and will correctly | |
| 1191 track the following environmental changes: | |
| 1192 | |
| 1193 -- changes of any sort to the list of directories to be searched. | |
| 1194 -- addition and deletion of non-shadowing files (see below) from the | |
| 1195 directories in the list. | |
| 1196 -- byte-compilation of a .el file into a .elc file. | |
| 1197 | |
| 1198 `locate-file' will primarily get confused if you add a file that shadows | |
| 1199 \(i.e. has the same name as) another file further down in the directory list. | |
| 1200 In this case, you must call `locate-file-clear-hashing'. | |
| 1201 | |
| 1202 If PATH is t, it means to fully clear all the accumulated hashes. This | |
| 1203 can be used if the internal tables grow too large, or when dumping. | |
| 1204 */ | |
| 1205 (path)) | |
| 1206 { | |
| 1207 if (EQ (path, Qt)) | |
| 1208 Fclrhash (Vlocate_file_hash_table); | |
| 1209 else | |
| 1210 { | |
| 2367 | 1211 EXTERNAL_LIST_LOOP_2 (elt, path) |
| 428 | 1212 { |
| 2367 | 1213 Lisp_Object pathel = Fexpand_file_name (elt, Qnil); |
| 428 | 1214 Fremhash (pathel, Vlocate_file_hash_table); |
| 1215 } | |
| 1216 } | |
| 1217 return Qnil; | |
| 1218 } | |
| 1219 | |
| 1220 /* Search for a file whose name is STR, looking in directories | |
| 1221 in the Lisp list PATH, and trying suffixes from SUFFIXES. | |
| 1222 SUFFIXES is a list of possible suffixes, or (for backward | |
| 1223 compatibility) a string containing possible suffixes separated by | |
| 1224 colons. | |
| 1225 On success, returns a file descriptor. On failure, returns -1. | |
| 1226 | |
| 1227 MODE nonnegative means don't open the files, | |
| 1228 just look for one for which access(file,MODE) succeeds. In this case, | |
| 951 | 1229 returns a nonnegative value on success. On failure, returns -1. |
| 428 | 1230 |
| 2548 | 1231 If STOREPTR is non-nil, it points to a slot where the name of |
| 428 | 1232 the file actually found should be stored as a Lisp string. |
| 1233 Nil is stored there on failure. | |
| 1234 | |
| 1235 Called openp() in FSFmacs. */ | |
| 1236 | |
| 1237 int | |
| 1238 locate_file (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, | |
| 1239 Lisp_Object *storeptr, int mode) | |
| 1240 { | |
| 1241 /* This function can GC */ | |
| 1242 Lisp_Object suffixtab = Qnil; | |
| 2367 | 1243 Lisp_Object pathel_expanded; |
| 428 | 1244 int val; |
| 1245 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1246 | |
| 1247 if (storeptr) | |
| 1248 *storeptr = Qnil; | |
| 1249 | |
| 1250 /* Is it really necessary to gcpro path and str? It shouldn't be | |
| 1251 unless some caller has fucked up. There are known instances that | |
| 1252 call us with build_string("foo:bar") as SUFFIXES, though. */ | |
| 1253 GCPRO4 (path, str, suffixes, suffixtab); | |
| 1254 | |
| 1255 /* if this filename has directory components, it's too complicated | |
| 1256 to try and use the hash tables. */ | |
| 1257 if (!NILP (Ffile_name_directory (str))) | |
| 1258 { | |
| 1259 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1260 UNGCPRO; | |
| 1261 return val; | |
| 1262 } | |
| 1263 | |
| 1264 suffixtab = locate_file_construct_suffixed_files (str, suffixes); | |
| 1265 | |
| 2367 | 1266 { |
| 1267 EXTERNAL_LIST_LOOP_2 (pathel, path) | |
| 1268 { | |
| 1269 Lisp_Object hash_table; | |
| 1270 int found = 0; | |
| 1271 | |
| 1272 /* If this path element is relative, we have to look by hand. */ | |
| 1273 if (NILP (pathel) || NILP (Ffile_name_absolute_p (pathel))) | |
| 1274 { | |
| 1275 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1276 mode); | |
| 1277 if (val >= 0) | |
| 428 | 1278 { |
| 2367 | 1279 UNGCPRO; |
| 1280 return val; | |
| 428 | 1281 } |
| 2367 | 1282 continue; |
| 1283 } | |
| 1284 | |
| 1285 pathel_expanded = Fexpand_file_name (pathel, Qnil); | |
| 1286 hash_table = locate_file_find_directory_hash_table (pathel_expanded); | |
| 1287 | |
| 1288 if (!NILP (hash_table)) | |
| 1289 { | |
| 1290 /* Loop over suffixes. */ | |
| 1291 LIST_LOOP_2 (elt, suffixtab) | |
| 1292 if (!NILP (Fgethash (elt, hash_table, Qnil))) | |
| 1293 { | |
| 1294 found = 1; | |
| 1295 break; | |
| 1296 } | |
| 1297 } | |
| 1298 | |
| 1299 if (found) | |
| 1300 { | |
| 1301 /* This is a likely candidate. Look by hand in this directory | |
| 1302 so we don't get thrown off if someone byte-compiles a file. */ | |
| 1303 val = locate_file_in_directory (pathel, str, suffixes, storeptr, | |
| 1304 mode); | |
| 1305 if (val >= 0) | |
| 1306 { | |
| 1307 UNGCPRO; | |
| 1308 return val; | |
| 1309 } | |
| 1310 | |
| 1311 /* Hmm ... the file isn't actually there. (Or possibly it's | |
| 1312 a directory ...) So refresh our hashing. */ | |
| 1313 locate_file_refresh_hashing (pathel_expanded); | |
| 1314 } | |
| 1315 } | |
| 428 | 1316 } |
| 1317 | |
| 1318 /* File is probably not there, but check the hard way just in case. */ | |
| 1319 val = locate_file_without_hash (path, str, suffixes, storeptr, mode); | |
| 1320 if (val >= 0) | |
| 1321 { | |
| 1322 /* Sneaky user added a file without telling us. */ | |
| 1323 Flocate_file_clear_hashing (path); | |
| 1324 } | |
| 1325 | |
| 1326 UNGCPRO; | |
| 1327 return val; | |
| 1328 } | |
| 1329 | |
| 1330 | |
| 1331 #ifdef LOADHIST | |
| 1332 | |
| 1333 /* Merge the list we've accumulated of globals from the current input source | |
| 1334 into the load_history variable. The details depend on whether | |
| 1335 the source has an associated file name or not. */ | |
| 1336 | |
| 1337 static void | |
| 1338 build_load_history (int loading, Lisp_Object source) | |
| 1339 { | |
| 1340 REGISTER Lisp_Object tail, prev, newelt; | |
| 1341 REGISTER Lisp_Object tem, tem2; | |
| 1342 int foundit; | |
| 1343 | |
| 1344 #if !defined(LOADHIST_DUMPED) | |
| 1345 /* Don't bother recording anything for preloaded files. */ | |
| 1346 if (purify_flag) | |
| 1347 return; | |
| 1348 #endif | |
| 1349 | |
| 1350 tail = Vload_history; | |
| 1351 prev = Qnil; | |
| 1352 foundit = 0; | |
| 1353 while (!NILP (tail)) | |
| 1354 { | |
| 1355 tem = Fcar (tail); | |
| 1356 | |
| 1357 /* Find the feature's previous assoc list... */ | |
| 1358 if (internal_equal (source, Fcar (tem), 0)) | |
| 1359 { | |
| 1360 foundit = 1; | |
| 1361 | |
| 1362 /* If we're loading, remove it. */ | |
| 1363 if (loading) | |
| 1364 { | |
| 1365 if (NILP (prev)) | |
| 1366 Vload_history = Fcdr (tail); | |
| 1367 else | |
| 1368 Fsetcdr (prev, Fcdr (tail)); | |
| 1369 } | |
| 1370 | |
| 1371 /* Otherwise, cons on new symbols that are not already members. */ | |
| 1372 else | |
| 1373 { | |
| 1374 tem2 = Vcurrent_load_list; | |
| 1375 | |
| 1376 while (CONSP (tem2)) | |
| 1377 { | |
| 1378 newelt = XCAR (tem2); | |
| 1379 | |
| 1380 if (NILP (Fmemq (newelt, tem))) | |
| 1381 Fsetcar (tail, Fcons (Fcar (tem), | |
| 1382 Fcons (newelt, Fcdr (tem)))); | |
| 1383 | |
| 1384 tem2 = XCDR (tem2); | |
| 1385 QUIT; | |
| 1386 } | |
| 1387 } | |
| 1388 } | |
| 1389 else | |
| 1390 prev = tail; | |
| 1391 tail = Fcdr (tail); | |
| 1392 QUIT; | |
| 1393 } | |
| 1394 | |
| 1395 /* If we're loading, cons the new assoc onto the front of load-history, | |
| 1396 the most-recently-loaded position. Also do this if we didn't find | |
| 1397 an existing member for the current source. */ | |
| 1398 if (loading || !foundit) | |
| 1399 Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
| 1400 Vload_history); | |
| 1401 } | |
| 1402 | |
| 1403 #else /* !LOADHIST */ | |
| 1404 #define build_load_history(x,y) | |
| 1405 #endif /* !LOADHIST */ | |
| 1406 | |
| 1407 | |
| 1408 static void | |
| 1409 readevalloop (Lisp_Object readcharfun, | |
| 1410 Lisp_Object sourcename, | |
| 1411 Lisp_Object (*evalfun) (Lisp_Object), | |
| 1412 int printflag) | |
| 1413 { | |
| 1414 /* This function can GC */ | |
| 867 | 1415 REGISTER Ichar c; |
| 1849 | 1416 Lisp_Object val = Qnil; |
| 428 | 1417 int speccount = specpdl_depth (); |
| 1418 struct gcpro gcpro1, gcpro2; | |
| 1419 struct buffer *b = 0; | |
| 1420 | |
| 1421 if (BUFFERP (readcharfun)) | |
| 1422 b = XBUFFER (readcharfun); | |
| 1423 else if (MARKERP (readcharfun)) | |
| 1424 b = XMARKER (readcharfun)->buffer; | |
| 1425 | |
| 1426 /* Don't do this. It is not necessary, and it needlessly exposes | |
| 1427 READCHARFUN (which can be a stream) to Lisp. --hniksic */ | |
| 1428 /*specbind (Qstandard_input, readcharfun);*/ | |
| 1429 | |
| 2548 | 1430 internal_bind_lisp_object (&Vcurrent_load_list, Qnil); |
| 428 | 1431 |
| 1432 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1433 Vcurrent_compiled_function_annotation = Qnil; | |
| 1434 #endif | |
| 1435 GCPRO2 (val, sourcename); | |
| 1436 | |
| 1437 LOADHIST_ATTACH (sourcename); | |
| 1438 | |
| 1439 while (1) | |
| 1440 { | |
| 1441 QUIT; | |
| 1442 | |
| 1443 if (b != 0 && !BUFFER_LIVE_P (b)) | |
| 563 | 1444 invalid_operation ("Reading from killed buffer", Qunbound); |
| 428 | 1445 |
| 1446 c = readchar (readcharfun); | |
| 1447 if (c == ';') | |
| 1448 { | |
| 1449 /* Skip comment */ | |
| 1450 while ((c = readchar (readcharfun)) != '\n' && c != -1) | |
| 1451 QUIT; | |
| 1452 continue; | |
| 1453 } | |
| 1454 if (c < 0) | |
| 1455 break; | |
| 1456 | |
| 1457 /* Ignore whitespace here, so we can detect eof. */ | |
| 1458 if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
| 1459 continue; | |
| 1460 | |
| 814 | 1461 unreadchar (readcharfun, c); |
| 1462 Vread_objects = Qnil; | |
| 1463 if (NILP (Vload_read_function)) | |
| 1464 val = read0 (readcharfun); | |
| 428 | 1465 else |
| 814 | 1466 val = call1 (Vload_read_function, readcharfun); |
| 428 | 1467 val = (*evalfun) (val); |
| 1468 if (printflag) | |
| 1469 { | |
| 1470 Vvalues = Fcons (val, Vvalues); | |
| 1471 if (EQ (Vstandard_output, Qt)) | |
| 1472 Fprin1 (val, Qnil); | |
| 1473 else | |
| 1474 Fprint (val, Qnil); | |
| 1475 } | |
| 1476 } | |
| 1477 | |
| 1478 build_load_history (LSTREAMP (readcharfun) || | |
| 1479 /* This looks weird, but it's what's in FSFmacs */ | |
| 1480 (b ? BUF_NARROWED (b) : BUF_NARROWED (current_buffer)), | |
| 1481 sourcename); | |
| 1482 UNGCPRO; | |
| 1483 | |
| 771 | 1484 unbind_to (speccount); |
| 428 | 1485 } |
| 1486 | |
| 1487 DEFUN ("eval-buffer", Feval_buffer, 0, 2, "bBuffer: ", /* | |
| 1488 Execute BUFFER as Lisp code. | |
| 1489 Programs can pass two arguments, BUFFER and PRINTFLAG. | |
| 1490 BUFFER is the buffer to evaluate (nil means use current buffer). | |
| 1491 PRINTFLAG controls printing of output: | |
| 444 | 1492 nil means discard it; anything else is a stream for printing. |
| 428 | 1493 |
| 1494 If there is no error, point does not move. If there is an error, | |
| 1495 point remains at the end of the last character read from the buffer. | |
| 1496 */ | |
| 444 | 1497 (buffer, printflag)) |
| 428 | 1498 { |
| 1499 /* This function can GC */ | |
| 1500 int speccount = specpdl_depth (); | |
| 1501 Lisp_Object tem, buf; | |
| 1502 | |
| 444 | 1503 if (NILP (buffer)) |
| 428 | 1504 buf = Fcurrent_buffer (); |
| 1505 else | |
| 444 | 1506 buf = Fget_buffer (buffer); |
| 428 | 1507 if (NILP (buf)) |
| 563 | 1508 invalid_argument ("No such buffer", Qunbound); |
| 428 | 1509 |
| 1510 if (NILP (printflag)) | |
| 1511 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ | |
| 1512 else | |
| 1513 tem = printflag; | |
| 1514 specbind (Qstandard_output, tem); | |
| 1515 record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
| 1516 BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
| 1517 readevalloop (buf, XBUFFER (buf)->filename, Feval, | |
| 1518 !NILP (printflag)); | |
| 1519 | |
| 771 | 1520 return unbind_to (speccount); |
| 428 | 1521 } |
| 1522 | |
| 1523 #if 0 | |
| 826 | 1524 DEFUN ("eval-current-buffer", Feval_current_buffer, 0, 1, "", /* |
| 428 | 1525 Execute the current buffer as Lisp code. |
| 1526 Programs can pass argument PRINTFLAG which controls printing of output: | |
| 1527 nil means discard it; anything else is stream for print. | |
| 1528 | |
| 1529 If there is no error, point does not move. If there is an error, | |
| 1530 point remains at the end of the last character read from the buffer. | |
| 1531 */ | |
| 1532 (printflag)) | |
| 1533 { | |
| 1534 code omitted; | |
| 1535 } | |
| 1536 #endif /* 0 */ | |
| 1537 | |
| 1538 DEFUN ("eval-region", Feval_region, 2, 3, "r", /* | |
| 1539 Execute the region as Lisp code. | |
| 444 | 1540 When called from programs, expects two arguments START and END |
| 428 | 1541 giving starting and ending indices in the current buffer |
| 1542 of the text to be executed. | |
| 444 | 1543 Programs can pass third optional argument STREAM which controls output: |
| 428 | 1544 nil means discard it; anything else is stream for printing it. |
| 1545 | |
| 1546 If there is no error, point does not move. If there is an error, | |
| 1547 point remains at the end of the last character read from the buffer. | |
| 1548 | |
| 1549 Note: Before evaling the region, this function narrows the buffer to it. | |
| 1550 If the code being eval'd should happen to trigger a redisplay you may | |
| 1551 see some text temporarily disappear because of this. | |
| 1552 */ | |
| 444 | 1553 (start, end, stream)) |
| 428 | 1554 { |
| 1555 /* This function can GC */ | |
| 1556 int speccount = specpdl_depth (); | |
| 1557 Lisp_Object tem; | |
| 1558 Lisp_Object cbuf = Fcurrent_buffer (); | |
| 1559 | |
| 444 | 1560 if (NILP (stream)) |
| 428 | 1561 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */ |
| 1562 else | |
| 444 | 1563 tem = stream; |
| 428 | 1564 specbind (Qstandard_output, tem); |
| 1565 | |
| 444 | 1566 if (NILP (stream)) |
| 428 | 1567 record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 844 | 1568 record_unwind_protect (save_restriction_restore, |
| 1569 save_restriction_save (current_buffer)); | |
| 428 | 1570 |
| 444 | 1571 /* This both uses start and checks its type. */ |
| 1572 Fgoto_char (start, cbuf); | |
| 1573 Fnarrow_to_region (make_int (BUF_BEGV (current_buffer)), end, cbuf); | |
| 428 | 1574 readevalloop (cbuf, XBUFFER (cbuf)->filename, Feval, |
| 444 | 1575 !NILP (stream)); |
| 428 | 1576 |
| 771 | 1577 return unbind_to (speccount); |
| 428 | 1578 } |
| 1579 | |
| 1580 DEFUN ("read", Fread, 0, 1, 0, /* | |
| 1581 Read one Lisp expression as text from STREAM, return as Lisp object. | |
| 1582 If STREAM is nil, use the value of `standard-input' (which see). | |
| 1583 STREAM or the value of `standard-input' may be: | |
| 1584 a buffer (read from point and advance it) | |
| 1585 a marker (read from where it points and advance it) | |
| 1586 a function (call it with no arguments for each character, | |
| 1587 call it with a char as argument to push a char back) | |
| 1588 a string (takes text from string, starting at the beginning) | |
| 1589 t (read text line using minibuffer and use it). | |
| 1590 */ | |
| 1591 (stream)) | |
| 1592 { | |
| 1593 if (NILP (stream)) | |
| 1594 stream = Vstandard_input; | |
| 1595 if (EQ (stream, Qt)) | |
| 1596 stream = Qread_char; | |
| 1597 | |
| 1598 Vread_objects = Qnil; | |
| 1599 | |
| 1600 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1601 Vcurrent_compiled_function_annotation = Qnil; | |
| 1602 #endif | |
| 1603 if (EQ (stream, Qread_char)) | |
| 1604 { | |
| 1605 Lisp_Object val = call1 (Qread_from_minibuffer, | |
| 771 | 1606 build_msg_string ("Lisp expression: ")); |
| 428 | 1607 return Fcar (Fread_from_string (val, Qnil, Qnil)); |
| 1608 } | |
| 1609 | |
| 1610 if (STRINGP (stream)) | |
| 1611 return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
| 1612 | |
| 1613 return read0 (stream); | |
| 1614 } | |
| 1615 | |
| 1616 DEFUN ("read-from-string", Fread_from_string, 1, 3, 0, /* | |
| 1617 Read one Lisp expression which is represented as text by STRING. | |
| 1618 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
| 1619 START and END optionally delimit a substring of STRING from which to read; | |
| 1620 they default to 0 and (length STRING) respectively. | |
| 1621 */ | |
| 1622 (string, start, end)) | |
| 1623 { | |
| 1624 Bytecount startval, endval; | |
| 1625 Lisp_Object tem; | |
| 1626 Lisp_Object lispstream = Qnil; | |
| 1627 struct gcpro gcpro1; | |
| 1628 | |
| 1629 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1630 Vcurrent_compiled_function_annotation = Qnil; | |
| 1631 #endif | |
| 1632 GCPRO1 (lispstream); | |
| 1633 CHECK_STRING (string); | |
| 1634 get_string_range_byte (string, start, end, &startval, &endval, | |
| 1635 GB_HISTORICAL_STRING_BEHAVIOR); | |
| 1636 lispstream = make_lisp_string_input_stream (string, startval, | |
| 1637 endval - startval); | |
| 1638 | |
| 1639 Vread_objects = Qnil; | |
| 1640 | |
| 1641 tem = read0 (lispstream); | |
| 1642 /* Yeah, it's ugly. Gonna make something of it? | |
| 1643 At least our reader is reentrant ... */ | |
| 1644 tem = | |
| 1645 (Fcons (tem, make_int | |
| 793 | 1646 (string_index_byte_to_char |
| 771 | 1647 (string, |
| 428 | 1648 startval + Lstream_byte_count (XLSTREAM (lispstream)))))); |
| 1649 Lstream_delete (XLSTREAM (lispstream)); | |
| 1650 UNGCPRO; | |
| 1651 return tem; | |
| 1652 } | |
| 1653 | |
| 1654 | |
| 1655 | |
| 1656 /* Use this for recursive reads, in contexts where internal tokens | |
| 1657 are not allowed. See also read1(). */ | |
| 1658 static Lisp_Object | |
| 1659 read0 (Lisp_Object readcharfun) | |
| 1660 { | |
| 1661 Lisp_Object val = read1 (readcharfun); | |
| 1662 | |
| 1663 if (CONSP (val) && UNBOUNDP (XCAR (val))) | |
| 1664 { | |
| 867 | 1665 Ichar c = XCHAR (XCDR (val)); |
| 853 | 1666 free_cons (val); |
| 428 | 1667 return Fsignal (Qinvalid_read_syntax, |
| 1668 list1 (Fchar_to_string (make_char (c)))); | |
| 1669 } | |
| 1670 | |
| 1671 return val; | |
| 1672 } | |
| 3543 | 1673 |
| 1674 /* A Unicode escape, as in C# (though we only permit them in strings | |
| 1675 and characters, not arbitrarily in the source code.) */ | |
| 1676 static Ichar | |
| 1677 read_unicode_escape (Lisp_Object readcharfun, int unicode_hex_count) | |
| 1678 { | |
| 1679 REGISTER Ichar i = 0, c; | |
| 1680 REGISTER int count = 0; | |
| 1681 Lisp_Object lisp_char; | |
| 1682 while (++count <= unicode_hex_count) | |
| 1683 { | |
| 1684 c = readchar (readcharfun); | |
| 1685 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ | |
| 1686 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); | |
| 1687 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1688 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1689 else | |
| 1690 { | |
| 1691 syntax_error ("Non-hex digit used for Unicode escape", | |
| 1692 make_char (c)); | |
| 1693 break; | |
| 1694 } | |
| 1695 } | |
| 1696 | |
| 4268 | 1697 if (i >= 0x110000 || i < 0) |
| 4096 | 1698 { |
| 1699 syntax_error ("Not a Unicode code point", make_int(i)); | |
| 1700 } | |
| 1701 | |
| 3543 | 1702 lisp_char = Funicode_to_char(make_int(i), Qnil); |
| 1703 | |
| 1704 if (EQ(Qnil, lisp_char)) | |
| 1705 { | |
| 4096 | 1706 /* Will happen on non-Mule. Silent corruption is what happens |
| 1707 elsewhere, and we used to do that to be consistent, but GNU error, | |
| 1708 so people writing portable code need to be able to handle that, and | |
| 1709 given a choice I prefer that behaviour. | |
| 1710 | |
| 1711 An undesirable aspect to this error is that the code point is shown | |
| 1712 as a decimal integer, which is mostly unreadable. */ | |
| 1713 syntax_error ("Unsupported Unicode code point", make_int(i)); | |
| 3543 | 1714 } |
| 4096 | 1715 |
| 1716 return XCHAR(lisp_char); | |
| 3543 | 1717 } |
| 1718 | |
| 428 | 1719 |
| 867 | 1720 static Ichar |
| 428 | 1721 read_escape (Lisp_Object readcharfun) |
| 1722 { | |
| 1723 /* This function can GC */ | |
| 867 | 1724 Ichar c = readchar (readcharfun); |
| 428 | 1725 |
| 1726 if (c < 0) | |
| 563 | 1727 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1728 |
| 1729 switch (c) | |
| 1730 { | |
| 1731 case 'a': return '\007'; | |
| 1732 case 'b': return '\b'; | |
| 1733 case 'd': return 0177; | |
| 1734 case 'e': return 033; | |
| 1735 case 'f': return '\f'; | |
| 1736 case 'n': return '\n'; | |
| 1737 case 'r': return '\r'; | |
| 1738 case 't': return '\t'; | |
| 1739 case 'v': return '\v'; | |
| 1740 case '\n': return -1; | |
| 1741 | |
| 1742 case 'M': | |
| 1743 c = readchar (readcharfun); | |
| 1744 if (c < 0) | |
| 563 | 1745 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1746 if (c != '-') |
| 563 | 1747 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1748 c = readchar (readcharfun); |
| 1749 if (c < 0) | |
| 563 | 1750 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1751 if (c == '\\') |
| 1752 c = read_escape (readcharfun); | |
| 1753 return c | 0200; | |
| 1754 | |
| 1755 /* Originally, FSF_KEYS provided a degree of FSF Emacs | |
| 1756 compatibility by defining character "modifiers" alt, super, | |
| 1757 hyper and shift to infest the characters (i.e. integers). | |
| 1758 | |
| 1759 However, this doesn't cut it for XEmacs 20, which | |
| 1760 distinguishes characters from integers. Without Mule, ?\H-a | |
| 1761 simply returns ?a because every character is clipped into | |
| 1762 0-255. Under Mule it is much worse -- ?\H-a with FSF_KEYS | |
| 1763 produces an illegal character, and moves us to crash-land. | |
| 1764 | |
| 1765 For these reasons, FSF_KEYS hack is useless and without hope | |
| 1766 of ever working under XEmacs 20. */ | |
| 1767 #ifdef FSF_KEYS | |
| 831 | 1768 /* Deleted */ |
| 1769 #endif | |
| 428 | 1770 |
| 1771 case 'C': | |
| 1772 c = readchar (readcharfun); | |
| 1773 if (c < 0) | |
| 563 | 1774 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1775 if (c != '-') |
| 563 | 1776 syntax_error ("Invalid escape character syntax", Qunbound); |
| 428 | 1777 case '^': |
| 1778 c = readchar (readcharfun); | |
| 1779 if (c < 0) | |
| 563 | 1780 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1781 if (c == '\\') |
| 1782 c = read_escape (readcharfun); | |
| 1783 /* FSFmacs junk for non-ASCII controls. | |
| 1784 Not used here. */ | |
| 1785 if (c == '?') | |
| 1786 return 0177; | |
| 1787 else | |
| 1788 return c & (0200 | 037); | |
| 1789 | |
| 1790 case '0': | |
| 1791 case '1': | |
| 1792 case '2': | |
| 1793 case '3': | |
| 1794 case '4': | |
| 1795 case '5': | |
| 1796 case '6': | |
| 1797 case '7': | |
| 1798 /* An octal escape, as in ANSI C. */ | |
| 1799 { | |
| 867 | 1800 REGISTER Ichar i = c - '0'; |
| 428 | 1801 REGISTER int count = 0; |
| 1802 while (++count < 3) | |
| 1803 { | |
| 1804 if ((c = readchar (readcharfun)) >= '0' && c <= '7') | |
| 1805 i = (i << 3) + (c - '0'); | |
| 1806 else | |
| 1807 { | |
| 1808 unreadchar (readcharfun, c); | |
| 1809 break; | |
| 1810 } | |
| 1811 } | |
| 831 | 1812 if (i >= 0400) |
| 3367 | 1813 syntax_error ("Non-ISO-8859-1 character specified with octal escape", |
| 831 | 1814 make_int (i)); |
| 428 | 1815 return i; |
| 1816 } | |
| 1817 | |
| 1818 case 'x': | |
| 1819 /* A hex escape, as in ANSI C, except that we only allow latin-1 | |
| 1820 characters to be read this way. What is "\x4e03" supposed to | |
| 1821 mean, anyways, if the internal representation is hidden? | |
| 1822 This is also consistent with the treatment of octal escapes. */ | |
| 1823 { | |
| 867 | 1824 REGISTER Ichar i = 0; |
| 428 | 1825 REGISTER int count = 0; |
| 1826 while (++count <= 2) | |
| 1827 { | |
| 1828 c = readchar (readcharfun); | |
| 867 | 1829 /* Remember, can't use isdigit(), isalpha() etc. on Ichars */ |
| 428 | 1830 if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
| 1831 else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
| 1832 else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
| 1833 else | |
| 1834 { | |
| 1835 unreadchar (readcharfun, c); | |
| 1836 break; | |
| 1837 } | |
| 1838 } | |
| 1839 return i; | |
| 1840 } | |
| 3367 | 1841 case 'U': |
| 1842 /* Post-Unicode-2.0: Up to eight hex chars */ | |
| 3543 | 1843 return read_unicode_escape(readcharfun, 8); |
| 3367 | 1844 case 'u': |
| 3543 | 1845 /* Unicode-2.0 and before; four hex chars. */ |
| 1846 return read_unicode_escape(readcharfun, 4); | |
| 428 | 1847 |
| 1848 default: | |
| 1849 return c; | |
| 1850 } | |
| 1851 } | |
| 1852 | |
| 1853 | |
| 1854 | |
| 1855 /* read symbol-constituent stuff into `Vread_buffer_stream'. */ | |
| 1856 static Bytecount | |
| 867 | 1857 read_atom_0 (Lisp_Object readcharfun, Ichar firstchar, int *saw_a_backslash) |
| 428 | 1858 { |
| 1859 /* This function can GC */ | |
| 867 | 1860 Ichar c = ((firstchar) >= 0 ? firstchar : readchar (readcharfun)); |
| 428 | 1861 Lstream_rewind (XLSTREAM (Vread_buffer_stream)); |
| 1862 | |
| 1863 *saw_a_backslash = 0; | |
| 1864 | |
| 1865 while (c > 040 /* #### - comma should be here as should backquote */ | |
| 1866 && !(c == '\"' || c == '\'' || c == ';' | |
| 1867 || c == '(' || c == ')' | |
| 1868 || c == '[' || c == ']' || c == '#' | |
| 1869 )) | |
| 1870 { | |
| 1871 if (c == '\\') | |
| 1872 { | |
| 1873 c = readchar (readcharfun); | |
| 1874 if (c < 0) | |
| 563 | 1875 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 1876 *saw_a_backslash = 1; |
| 1877 } | |
| 867 | 1878 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), c); |
| 428 | 1879 QUIT; |
| 1880 c = readchar (readcharfun); | |
| 1881 } | |
| 1882 | |
| 1883 if (c >= 0) | |
| 1884 unreadchar (readcharfun, c); | |
| 1885 /* blasted terminating 0 */ | |
| 867 | 1886 Lstream_put_ichar (XLSTREAM (Vread_buffer_stream), 0); |
| 428 | 1887 Lstream_flush (XLSTREAM (Vread_buffer_stream)); |
| 1888 | |
| 1889 return Lstream_byte_count (XLSTREAM (Vread_buffer_stream)) - 1; | |
| 1890 } | |
| 1891 | |
| 867 | 1892 static Lisp_Object parse_integer (const Ibyte *buf, Bytecount len, int base); |
| 428 | 1893 |
| 1894 static Lisp_Object | |
| 1895 read_atom (Lisp_Object readcharfun, | |
| 867 | 1896 Ichar firstchar, |
| 428 | 1897 int uninterned_symbol) |
| 1898 { | |
| 1899 /* This function can GC */ | |
| 1900 int saw_a_backslash; | |
| 1901 Bytecount len = read_atom_0 (readcharfun, firstchar, &saw_a_backslash); | |
| 1902 char *read_ptr = (char *) | |
| 1903 resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)); | |
| 1904 | |
| 1905 /* Is it an integer? */ | |
| 1906 if (! (saw_a_backslash || uninterned_symbol)) | |
| 1907 { | |
| 1908 /* If a token had any backslashes in it, it is disqualified from | |
| 1909 being an integer or a float. This means that 123\456 is a | |
| 1910 symbol, as is \123 (which is the way (intern "123") prints). | |
| 1911 Also, if token was preceded by #:, it's always a symbol. | |
| 1912 */ | |
| 1913 char *p = read_ptr + len; | |
| 1914 char *p1 = read_ptr; | |
| 1915 | |
| 1916 if (*p1 == '+' || *p1 == '-') p1++; | |
| 1917 if (p1 != p) | |
| 1918 { | |
| 1919 int c; | |
| 1920 | |
| 1921 while (p1 != p && (c = *p1) >= '0' && c <= '9') | |
| 1922 p1++; | |
| 1923 /* Integers can have trailing decimal points. */ | |
| 1924 if (p1 > read_ptr && p1 < p && *p1 == '.') | |
| 1925 p1++; | |
| 1926 if (p1 == p) | |
| 1927 { | |
| 1928 /* It is an integer. */ | |
| 1929 if (p1[-1] == '.') | |
| 1930 p1[-1] = '\0'; | |
| 1931 #if 0 | |
| 1932 { | |
| 1933 int number = 0; | |
| 1934 if (sizeof (int) == sizeof (EMACS_INT)) | |
| 1935 number = atoi (read_buffer); | |
| 1936 else if (sizeof (long) == sizeof (EMACS_INT)) | |
| 1937 number = atol (read_buffer); | |
| 1938 else | |
| 2500 | 1939 ABORT (); |
| 428 | 1940 return make_int (number); |
| 1941 } | |
| 1942 #else | |
| 867 | 1943 return parse_integer ((Ibyte *) read_ptr, len, 10); |
| 428 | 1944 #endif |
| 1945 } | |
| 1946 } | |
| 1983 | 1947 #ifdef HAVE_RATIO |
| 1948 if (isratio_string (read_ptr)) | |
| 1949 { | |
| 2013 | 1950 /* GMP ratio_set_string has no effect with initial + sign */ |
| 2010 | 1951 if (*read_ptr == '+') |
| 1952 read_ptr++; | |
| 1983 | 1953 ratio_set_string (scratch_ratio, read_ptr, 0); |
| 1954 ratio_canonicalize (scratch_ratio); | |
| 1955 return Fcanonicalize_number (make_ratio_rt (scratch_ratio)); | |
| 1956 } | |
| 1957 #endif | |
| 428 | 1958 if (isfloat_string (read_ptr)) |
| 1959 return make_float (atof (read_ptr)); | |
| 1960 } | |
| 1961 | |
| 1962 { | |
| 1963 Lisp_Object sym; | |
| 1964 if (uninterned_symbol) | |
| 867 | 1965 sym = Fmake_symbol ( make_string ((Ibyte *) read_ptr, len)); |
| 428 | 1966 else |
| 1967 { | |
| 867 | 1968 Lisp_Object name = make_string ((Ibyte *) read_ptr, len); |
| 428 | 1969 sym = Fintern (name, Qnil); |
| 1970 } | |
| 1971 return sym; | |
| 1972 } | |
| 1973 } | |
| 1974 | |
| 1975 | |
| 1976 static Lisp_Object | |
| 867 | 1977 parse_integer (const Ibyte *buf, Bytecount len, int base) |
| 428 | 1978 { |
| 867 | 1979 const Ibyte *lim = buf + len; |
| 1980 const Ibyte *p = buf; | |
| 428 | 1981 EMACS_UINT num = 0; |
| 1982 int negativland = 0; | |
| 1983 | |
| 1984 if (*p == '-') | |
| 1985 { | |
| 1986 negativland = 1; | |
| 1987 p++; | |
| 1988 } | |
| 1989 else if (*p == '+') | |
| 1990 { | |
| 1991 p++; | |
| 1992 } | |
| 1993 | |
| 1994 if (p == lim) | |
| 1995 goto loser; | |
| 1996 | |
| 1997 for (; (p < lim) && (*p != '\0'); p++) | |
| 1998 { | |
| 1999 int c = *p; | |
| 2000 EMACS_UINT onum; | |
| 2001 | |
| 2002 if (isdigit (c)) | |
| 2003 c = c - '0'; | |
| 2004 else if (isupper (c)) | |
| 2005 c = c - 'A' + 10; | |
| 2006 else if (islower (c)) | |
| 2007 c = c - 'a' + 10; | |
| 2008 else | |
| 2009 goto loser; | |
| 2010 | |
| 2011 if (c < 0 || c >= base) | |
| 2012 goto loser; | |
| 2013 | |
| 2014 onum = num; | |
| 2015 num = num * base + c; | |
| 2016 if (num < onum) | |
| 2017 goto overflow; | |
| 2018 } | |
| 2019 | |
| 2020 { | |
| 2021 EMACS_INT int_result = negativland ? - (EMACS_INT) num : (EMACS_INT) num; | |
| 2022 Lisp_Object result = make_int (int_result); | |
| 2023 if (num && ((XINT (result) < 0) != negativland)) | |
| 2024 goto overflow; | |
| 2025 if (XINT (result) != int_result) | |
| 2026 goto overflow; | |
| 2027 return result; | |
| 2028 } | |
| 2029 overflow: | |
| 1983 | 2030 #ifdef HAVE_BIGNUM |
| 2031 { | |
|
4329
d9eb5ea14f65
Provide %b in #'format; use it for converting between ints and bit vectors.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4268
diff
changeset
|
2032 bignum_set_string (scratch_bignum, (const char *) buf, base); |
| 1983 | 2033 return make_bignum_bg (scratch_bignum); |
| 2034 } | |
| 2035 #else | |
| 428 | 2036 return Fsignal (Qinvalid_read_syntax, |
| 771 | 2037 list3 (build_msg_string |
| 428 | 2038 ("Integer constant overflow in reader"), |
| 2039 make_string (buf, len), | |
| 2040 make_int (base))); | |
| 1983 | 2041 #endif /* HAVE_BIGNUM */ |
| 428 | 2042 loser: |
| 2043 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2044 list3 (build_msg_string |
| 428 | 2045 ("Invalid integer constant in reader"), |
| 2046 make_string (buf, len), | |
| 2047 make_int (base))); | |
| 2048 } | |
| 2049 | |
| 2050 | |
| 2051 static Lisp_Object | |
| 2052 read_integer (Lisp_Object readcharfun, int base) | |
| 2053 { | |
| 2054 /* This function can GC */ | |
| 2055 int saw_a_backslash; | |
| 2056 Bytecount len = read_atom_0 (readcharfun, -1, &saw_a_backslash); | |
| 2057 return (parse_integer | |
| 2058 (resizing_buffer_stream_ptr (XLSTREAM (Vread_buffer_stream)), | |
| 2059 ((saw_a_backslash) | |
| 2060 ? 0 /* make parse_integer signal error */ | |
| 2061 : len), | |
| 2062 base)); | |
| 2063 } | |
| 2064 | |
| 2065 static Lisp_Object | |
| 2066 read_bit_vector (Lisp_Object readcharfun) | |
| 2067 { | |
| 2068 unsigned_char_dynarr *dyn = Dynarr_new (unsigned_char); | |
| 440 | 2069 Lisp_Object val; |
| 428 | 2070 |
| 2071 while (1) | |
| 2072 { | |
| 444 | 2073 unsigned char bit; |
| 867 | 2074 Ichar c = readchar (readcharfun); |
| 444 | 2075 if (c == '0') |
| 2076 bit = 0; | |
| 2077 else if (c == '1') | |
| 2078 bit = 1; | |
| 2079 else | |
| 2080 { | |
| 2081 if (c >= 0) | |
| 2082 unreadchar (readcharfun, c); | |
| 2083 break; | |
| 2084 } | |
| 2085 Dynarr_add (dyn, bit); | |
| 428 | 2086 } |
| 2087 | |
| 440 | 2088 val = make_bit_vector_from_byte_vector (Dynarr_atp (dyn, 0), |
| 2089 Dynarr_length (dyn)); | |
| 2090 Dynarr_free (dyn); | |
| 2091 | |
| 2092 return val; | |
| 428 | 2093 } |
| 2094 | |
| 2095 | |
| 2096 | |
| 2097 /* structures */ | |
| 2098 | |
| 2099 struct structure_type * | |
| 2100 define_structure_type (Lisp_Object type, | |
| 2101 int (*validate) (Lisp_Object data, | |
| 578 | 2102 Error_Behavior errb), |
| 428 | 2103 Lisp_Object (*instantiate) (Lisp_Object data)) |
| 2104 { | |
| 2105 struct structure_type st; | |
| 2106 | |
| 2107 st.type = type; | |
| 2108 st.keywords = Dynarr_new (structure_keyword_entry); | |
| 2109 st.validate = validate; | |
| 2110 st.instantiate = instantiate; | |
| 2111 Dynarr_add (the_structure_type_dynarr, st); | |
| 2112 | |
| 2113 return Dynarr_atp (the_structure_type_dynarr, | |
| 2114 Dynarr_length (the_structure_type_dynarr) - 1); | |
| 2115 } | |
| 2116 | |
| 2117 void | |
| 2118 define_structure_type_keyword (struct structure_type *st, Lisp_Object keyword, | |
| 2119 int (*validate) (Lisp_Object keyword, | |
| 2120 Lisp_Object value, | |
| 578 | 2121 Error_Behavior errb)) |
| 428 | 2122 { |
| 2123 struct structure_keyword_entry en; | |
| 2124 | |
| 2125 en.keyword = keyword; | |
| 2126 en.validate = validate; | |
| 2127 Dynarr_add (st->keywords, en); | |
| 2128 } | |
| 2129 | |
| 2130 static struct structure_type * | |
| 2131 recognized_structure_type (Lisp_Object type) | |
| 2132 { | |
| 2133 int i; | |
| 2134 | |
| 2135 for (i = 0; i < Dynarr_length (the_structure_type_dynarr); i++) | |
| 2136 { | |
| 2137 struct structure_type *st = Dynarr_atp (the_structure_type_dynarr, i); | |
| 2138 if (EQ (st->type, type)) | |
| 2139 return st; | |
| 2140 } | |
| 2141 | |
| 2142 return 0; | |
| 2143 } | |
| 2144 | |
| 2145 static Lisp_Object | |
| 2146 read_structure (Lisp_Object readcharfun) | |
| 2147 { | |
| 867 | 2148 Ichar c = readchar (readcharfun); |
| 428 | 2149 Lisp_Object list = Qnil; |
| 2150 Lisp_Object orig_list = Qnil; | |
| 2151 Lisp_Object already_seen = Qnil; | |
| 2152 int keyword_count; | |
| 2153 struct structure_type *st; | |
| 2154 struct gcpro gcpro1, gcpro2; | |
| 2155 | |
| 2156 GCPRO2 (orig_list, already_seen); | |
| 2157 if (c != '(') | |
| 442 | 2158 RETURN_UNGCPRO (continuable_read_syntax_error ("#s not followed by paren")); |
| 428 | 2159 list = read_list (readcharfun, ')', 0, 0); |
| 2160 orig_list = list; | |
| 2161 { | |
| 2162 int len = XINT (Flength (list)); | |
| 2163 if (len == 0) | |
| 442 | 2164 RETURN_UNGCPRO (continuable_read_syntax_error |
| 428 | 2165 ("structure type not specified")); |
| 2166 if (!(len & 1)) | |
| 2167 RETURN_UNGCPRO | |
| 442 | 2168 (continuable_read_syntax_error |
| 428 | 2169 ("structures must have alternating keyword/value pairs")); |
| 2170 } | |
| 2171 | |
| 2172 st = recognized_structure_type (XCAR (list)); | |
| 2173 if (!st) | |
| 2174 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2175 list2 (build_msg_string |
| 428 | 2176 ("unrecognized structure type"), |
| 2177 XCAR (list)))); | |
| 2178 | |
| 2179 list = Fcdr (list); | |
| 2180 keyword_count = Dynarr_length (st->keywords); | |
| 2181 while (!NILP (list)) | |
| 2182 { | |
| 2183 Lisp_Object keyword, value; | |
| 2184 int i; | |
| 2185 struct structure_keyword_entry *en = NULL; | |
| 2186 | |
| 2187 keyword = Fcar (list); | |
| 2188 list = Fcdr (list); | |
| 2189 value = Fcar (list); | |
| 2190 list = Fcdr (list); | |
| 2191 | |
| 2192 if (!NILP (memq_no_quit (keyword, already_seen))) | |
| 2193 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2194 list2 (build_msg_string |
| 428 | 2195 ("structure keyword already seen"), |
| 2196 keyword))); | |
| 2197 | |
| 2198 for (i = 0; i < keyword_count; i++) | |
| 2199 { | |
| 2200 en = Dynarr_atp (st->keywords, i); | |
| 2201 if (EQ (keyword, en->keyword)) | |
| 2202 break; | |
| 2203 } | |
| 2204 | |
| 2205 if (i == keyword_count) | |
| 2206 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2207 list2 (build_msg_string |
| 428 | 2208 ("unrecognized structure keyword"), |
| 2209 keyword))); | |
| 2210 | |
| 2211 if (en->validate && ! (en->validate) (keyword, value, ERROR_ME)) | |
| 2212 RETURN_UNGCPRO | |
| 2213 (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2214 list3 (build_msg_string |
| 428 | 2215 ("invalid value for structure keyword"), |
| 2216 keyword, value))); | |
| 2217 | |
| 2218 already_seen = Fcons (keyword, already_seen); | |
| 2219 } | |
| 2220 | |
| 2221 if (st->validate && ! (st->validate) (orig_list, ERROR_ME)) | |
| 2222 RETURN_UNGCPRO (Fsignal (Qinvalid_read_syntax, | |
| 771 | 2223 list2 (build_msg_string |
| 428 | 2224 ("invalid structure initializer"), |
| 2225 orig_list))); | |
| 2226 | |
| 2227 RETURN_UNGCPRO ((st->instantiate) (XCDR (orig_list))); | |
| 2228 } | |
| 2229 | |
| 2230 | |
| 2231 static Lisp_Object read_compiled_function (Lisp_Object readcharfun, | |
| 2232 int terminator); | |
| 2233 static Lisp_Object read_vector (Lisp_Object readcharfun, int terminator); | |
| 2234 | |
| 2235 /* Get the next character; filter out whitespace and comments */ | |
| 2236 | |
| 867 | 2237 static Ichar |
| 428 | 2238 reader_nextchar (Lisp_Object readcharfun) |
| 2239 { | |
| 2240 /* This function can GC */ | |
| 867 | 2241 Ichar c; |
| 428 | 2242 |
| 2243 retry: | |
| 2244 QUIT; | |
| 2245 c = readchar (readcharfun); | |
| 2246 if (c < 0) | |
| 563 | 2247 signal_error (Qend_of_file, 0, READCHARFUN_MAYBE (readcharfun)); |
| 428 | 2248 |
| 2249 switch (c) | |
| 2250 { | |
| 2251 default: | |
| 2252 { | |
| 2253 /* Ignore whitespace and control characters */ | |
| 2254 if (c <= 040) | |
| 2255 goto retry; | |
| 2256 return c; | |
| 2257 } | |
| 2258 | |
| 2259 case ';': | |
| 2260 { | |
| 2261 /* Comment */ | |
| 2262 while ((c = readchar (readcharfun)) >= 0 && c != '\n') | |
| 2263 QUIT; | |
| 2264 goto retry; | |
| 2265 } | |
| 2266 } | |
| 2267 } | |
| 2268 | |
| 2269 #if 0 | |
| 2270 static Lisp_Object | |
| 2271 list2_pure (int pure, Lisp_Object a, Lisp_Object b) | |
| 2272 { | |
| 2273 return pure ? pure_cons (a, pure_cons (b, Qnil)) : list2 (a, b); | |
| 2274 } | |
| 2275 #endif | |
| 2276 | |
| 3543 | 2277 static Lisp_Object |
| 2278 read_string (Lisp_Object readcharfun, Ichar delim, int raw, | |
| 2279 int honor_unicode) | |
| 2280 { | |
| 2281 #ifdef I18N3 | |
| 2282 /* #### If the input stream is translating, then the string | |
| 2283 should be marked as translatable by setting its | |
| 2284 `string-translatable' property to t. .el and .elc files | |
| 2285 normally are translating input streams. See Fgettext() | |
| 2286 and print_internal(). */ | |
| 2287 #endif | |
| 2288 Ichar c; | |
| 2289 int cancel = 0; | |
| 2290 | |
| 2291 Lstream_rewind(XLSTREAM(Vread_buffer_stream)); | |
| 2292 while ((c = readchar(readcharfun)) >= 0 && c != delim) | |
| 2293 { | |
| 2294 if (c == '\\') | |
| 2295 { | |
| 2296 if (raw) | |
| 2297 { | |
| 2298 c = readchar(readcharfun); | |
| 2299 if (honor_unicode && ('u' == c || 'U' == c)) | |
| 2300 { | |
| 2301 c = read_unicode_escape(readcharfun, | |
| 2302 'U' == c ? 8 : 4); | |
| 2303 } | |
| 2304 else | |
| 2305 { | |
| 2306 /* For raw strings, insert the | |
| 2307 backslash and the next char, */ | |
| 2308 Lstream_put_ichar(XLSTREAM | |
| 2309 (Vread_buffer_stream), | |
| 2310 '\\'); | |
| 2311 } | |
| 2312 } | |
| 2313 else | |
| 2314 /* otherwise, backslash escapes the next char. */ | |
| 2315 c = read_escape(readcharfun); | |
| 2316 } | |
| 2317 /* c is -1 if \ newline has just been seen */ | |
| 2318 if (c == -1) | |
| 2319 { | |
| 2320 if (Lstream_byte_count | |
| 2321 (XLSTREAM(Vread_buffer_stream)) == | |
| 2322 0) | |
| 2323 cancel = 1; | |
| 2324 } | |
| 2325 else | |
| 2326 Lstream_put_ichar(XLSTREAM | |
| 2327 (Vread_buffer_stream), | |
| 2328 c); | |
| 2329 QUIT; | |
| 2330 } | |
| 2331 if (c < 0) | |
| 2332 return Fsignal(Qend_of_file, | |
| 2333 list1(READCHARFUN_MAYBE(readcharfun))); | |
| 2334 | |
| 2335 /* If purifying, and string starts with \ newline, | |
| 2336 return zero instead. This is for doc strings | |
| 2337 that we are really going to find in lib-src/DOC.nn.nn */ | |
| 2338 if (purify_flag && NILP(Vinternal_doc_file_name) | |
| 2339 && cancel) | |
| 2340 return Qzero; | |
| 2341 | |
| 2342 Lstream_flush(XLSTREAM(Vread_buffer_stream)); | |
| 2343 return make_string(resizing_buffer_stream_ptr | |
| 2344 (XLSTREAM(Vread_buffer_stream)), | |
| 2345 Lstream_byte_count(XLSTREAM(Vread_buffer_stream))); | |
| 2346 } | |
| 2347 | |
| 2348 static Lisp_Object | |
| 2349 read_raw_string (Lisp_Object readcharfun) | |
| 2350 { | |
| 2351 Ichar c; | |
| 2352 Ichar permit_unicode = 0; | |
| 2353 | |
| 2354 do { | |
| 2355 c = reader_nextchar(readcharfun); | |
| 2356 switch (c) { | |
| 2357 /* #r:engine"my sexy raw string" -- raw string w/ flags*/ | |
| 2358 /* case ':': */ | |
| 2359 /* #ru"Hi there\u20AC \U000020AC" -- raw string, honouring Unicode. */ | |
| 2360 case 'u': | |
| 2361 case 'U': | |
| 2362 permit_unicode = c; | |
| 2363 continue; | |
| 2364 | |
| 2365 /* #r"my raw string" -- raw string */ | |
| 2366 case '\"': | |
| 2367 return read_string(readcharfun, '\"', 1, permit_unicode); | |
| 2368 /* invalid syntax */ | |
| 2369 default: | |
| 2370 { | |
| 2371 if (permit_unicode) | |
| 2372 { | |
| 2373 unreadchar(readcharfun, permit_unicode); | |
| 2374 } | |
| 2375 unreadchar(readcharfun, c); | |
| 2376 return Fsignal(Qinvalid_read_syntax, | |
| 2377 list1(build_string | |
| 2378 ("unrecognized raw string syntax"))); | |
| 2379 } | |
| 2380 } | |
| 2381 } while (1); | |
| 2382 } | |
| 2383 | |
| 428 | 2384 /* Read the next Lisp object from the stream READCHARFUN and return it. |
| 2385 If the return value is a cons whose car is Qunbound, then read1() | |
| 2386 encountered a misplaced token (e.g. a right bracket, right paren, | |
| 2387 or dot followed by a non-number). To filter this stuff out, | |
| 2388 use read0(). */ | |
| 2389 | |
| 2390 static Lisp_Object | |
| 2391 read1 (Lisp_Object readcharfun) | |
| 2392 { | |
| 867 | 2393 Ichar c; |
| 428 | 2394 |
| 2395 retry: | |
| 2396 c = reader_nextchar (readcharfun); | |
| 2397 | |
| 2398 switch (c) | |
| 2399 { | |
| 2400 case '(': | |
| 2401 { | |
| 2402 #ifdef LISP_BACKQUOTES /* old backquote compatibility in lisp reader */ | |
| 2403 /* if this is disabled, then other code in eval.c must be enabled */ | |
| 867 | 2404 Ichar ch = reader_nextchar (readcharfun); |
| 428 | 2405 switch (ch) |
| 2406 { | |
| 2407 case '`': | |
| 2408 { | |
| 2409 Lisp_Object tem; | |
| 853 | 2410 int speccount = internal_bind_int (&old_backquote_flag, |
| 2411 1 + old_backquote_flag); | |
| 428 | 2412 tem = read0 (readcharfun); |
| 771 | 2413 unbind_to (speccount); |
| 428 | 2414 ch = reader_nextchar (readcharfun); |
| 2415 if (ch != ')') | |
| 2416 { | |
| 2417 unreadchar (readcharfun, ch); | |
| 2418 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2419 list1 (build_msg_string |
| 428 | 2420 ("Weird old-backquote syntax"))); |
| 2421 } | |
| 2422 return list2 (Qbacktick, tem); | |
| 2423 } | |
| 2424 case ',': | |
| 2425 { | |
| 2426 if (old_backquote_flag) | |
| 2427 { | |
| 2428 Lisp_Object tem, comma_type; | |
| 2429 ch = readchar (readcharfun); | |
| 2430 if (ch == '@') | |
| 2431 comma_type = Qcomma_at; | |
| 2432 else | |
| 2433 { | |
| 2434 if (ch >= 0) | |
| 2435 unreadchar (readcharfun, ch); | |
| 2436 comma_type = Qcomma; | |
| 2437 } | |
| 2438 tem = read0 (readcharfun); | |
| 2439 ch = reader_nextchar (readcharfun); | |
| 2440 if (ch != ')') | |
| 2441 { | |
| 2442 unreadchar (readcharfun, ch); | |
| 2443 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2444 list1 (build_msg_string |
| 428 | 2445 ("Weird old-backquote syntax"))); |
| 2446 } | |
| 2447 return list2 (comma_type, tem); | |
| 2448 } | |
| 2449 else | |
| 2450 { | |
| 2451 unreadchar (readcharfun, ch); | |
| 2452 #if 0 | |
| 2453 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2454 list1 (build_msg_string ("Comma outside of backquote"))); |
| 428 | 2455 #else |
| 2456 /* #### - yuck....but this is reverse compatible. */ | |
| 2457 /* mostly this is required by edebug, which does its own | |
| 2458 annotated reading. We need to have an annotated_read | |
| 2459 function that records (with markers) the buffer | |
| 2460 positions of the elements that make up lists, then that | |
| 2461 can be used in edebug and bytecomp and the check above | |
| 2462 can go back in. --Stig */ | |
| 2463 break; | |
| 2464 #endif | |
| 2465 } | |
| 2466 } | |
| 2467 default: | |
| 2468 unreadchar (readcharfun, ch); | |
| 2469 } /* switch(ch) */ | |
| 2470 #endif /* old backquote crap... */ | |
| 2471 return read_list (readcharfun, ')', 1, 1); | |
| 2472 } | |
| 2473 case '[': | |
| 2474 return read_vector (readcharfun, ']'); | |
| 2475 | |
| 2476 case ')': | |
| 2477 case ']': | |
| 2478 /* #### - huh? these don't do what they seem... */ | |
| 2479 return noseeum_cons (Qunbound, make_char (c)); | |
| 2480 case '.': | |
| 2481 { | |
| 2482 /* If a period is followed by a number, then we should read it | |
| 2483 as a floating point number. Otherwise, it denotes a dotted | |
| 2484 pair. | |
| 2485 */ | |
| 2486 c = readchar (readcharfun); | |
| 2487 unreadchar (readcharfun, c); | |
| 2488 | |
| 867 | 2489 /* Can't use isdigit on Ichars */ |
| 428 | 2490 if (c < '0' || c > '9') |
| 2491 return noseeum_cons (Qunbound, make_char ('.')); | |
| 2492 | |
| 2493 /* Note that read_atom will loop | |
| 2494 at least once, assuring that we will not try to UNREAD | |
| 2495 two characters in a row. | |
| 2496 (I think this doesn't matter anymore because there should | |
| 2497 be no more danger in unreading multiple characters) */ | |
| 2498 return read_atom (readcharfun, '.', 0); | |
| 2499 } | |
| 2500 | |
| 2501 case '#': | |
| 2502 { | |
| 2503 c = readchar (readcharfun); | |
| 2504 switch (c) | |
| 2505 { | |
| 2506 #if 0 /* FSFmacs silly char-table syntax */ | |
| 2507 case '^': | |
| 2508 #endif | |
| 2509 #if 0 /* FSFmacs silly bool-vector syntax */ | |
| 2510 case '&': | |
| 2511 #endif | |
| 2512 /* "#["-- byte-code constant syntax */ | |
| 2513 /* purecons #[...] syntax */ | |
| 2514 case '[': return read_compiled_function (readcharfun, ']' | |
| 2515 /*, purify_flag */ ); | |
| 2516 /* "#:"-- gensym syntax */ | |
| 2517 case ':': return read_atom (readcharfun, -1, 1); | |
| 2518 /* #'x => (function x) */ | |
| 2519 case '\'': return list2 (Qfunction, read0 (readcharfun)); | |
| 2520 #if 0 | |
| 2521 /* RMS uses this syntax for fat-strings. | |
| 2522 If we use it for vectors, then obscure bugs happen. | |
| 2523 */ | |
| 2524 /* "#(" -- Scheme/CL vector syntax */ | |
| 2525 case '(': return read_vector (readcharfun, ')'); | |
| 2526 #endif | |
| 2527 #if 0 /* FSFmacs */ | |
| 2528 case '(': | |
| 2529 { | |
| 2530 Lisp_Object tmp; | |
| 2531 struct gcpro gcpro1; | |
| 2532 | |
| 2533 /* Read the string itself. */ | |
| 2534 tmp = read1 (readcharfun); | |
| 2535 if (!STRINGP (tmp)) | |
| 2536 { | |
| 2537 if (CONSP (tmp) && UNBOUNDP (XCAR (tmp))) | |
| 853 | 2538 free_cons (tmp); |
| 428 | 2539 return Fsignal (Qinvalid_read_syntax, |
| 2540 list1 (build_string ("#"))); | |
| 2541 } | |
| 2542 GCPRO1 (tmp); | |
| 2543 /* Read the intervals and their properties. */ | |
| 2544 while (1) | |
| 2545 { | |
| 2546 Lisp_Object beg, end, plist; | |
| 867 | 2547 Ichar ch; |
| 428 | 2548 int invalid = 0; |
| 2549 | |
| 2550 beg = read1 (readcharfun); | |
| 2551 if (CONSP (beg) && UNBOUNDP (XCAR (beg))) | |
| 2552 { | |
| 2553 ch = XCHAR (XCDR (beg)); | |
| 853 | 2554 free_cons (beg); |
| 428 | 2555 if (ch == ')') |
| 2556 break; | |
| 2557 else | |
| 2558 invalid = 1; | |
| 2559 } | |
| 2560 if (!invalid) | |
| 2561 { | |
| 2562 end = read1 (readcharfun); | |
| 2563 if (CONSP (end) && UNBOUNDP (XCAR (end))) | |
| 2564 { | |
| 853 | 2565 free_cons (end); |
| 428 | 2566 invalid = 1; |
| 2567 } | |
| 2568 } | |
| 2569 if (!invalid) | |
| 2570 { | |
| 2571 plist = read1 (readcharfun); | |
| 2572 if (CONSP (plist) && UNBOUNDP (XCAR (plist))) | |
| 2573 { | |
| 853 | 2574 free_cons (plist); |
| 428 | 2575 invalid = 1; |
| 2576 } | |
| 2577 } | |
| 2578 if (invalid) | |
| 2579 RETURN_UNGCPRO | |
| 2580 (Fsignal (Qinvalid_read_syntax, | |
| 2581 list2 | |
| 771 | 2582 (build_msg_string ("invalid string property list"), |
| 428 | 2583 XCDR (plist)))); |
| 2584 Fset_text_properties (beg, end, plist, tmp); | |
| 2585 } | |
| 2586 UNGCPRO; | |
| 2587 return tmp; | |
| 2588 } | |
| 2589 #endif /* 0 */ | |
| 2590 case '@': | |
| 2591 { | |
| 2592 /* #@NUMBER is used to skip NUMBER following characters. | |
| 2593 That's used in .elc files to skip over doc strings | |
| 2594 and function definitions. */ | |
| 2595 int i, nskip = 0; | |
| 2596 | |
| 2597 /* Read a decimal integer. */ | |
| 2598 while ((c = readchar (readcharfun)) >= 0 | |
| 2599 && c >= '0' && c <= '9') | |
| 2600 nskip = (10 * nskip) + (c - '0'); | |
| 2601 if (c >= 0) | |
| 2602 unreadchar (readcharfun, c); | |
| 2603 | |
| 2604 /* FSF has code here that maybe caches the skipped | |
| 2605 string. See above for why this is totally | |
| 2606 losing. We handle this differently. */ | |
| 2607 | |
| 2608 /* Skip that many characters. */ | |
| 2609 for (i = 0; i < nskip && c >= 0; i++) | |
| 2610 c = readchar (readcharfun); | |
| 2611 | |
| 2612 goto retry; | |
| 2613 } | |
| 2614 case '$': return Vload_file_name_internal; | |
| 2615 /* bit vectors */ | |
| 2616 case '*': return read_bit_vector (readcharfun); | |
| 2617 /* #o10 => 8 -- octal constant syntax */ | |
| 2618 case 'o': return read_integer (readcharfun, 8); | |
| 2619 /* #xdead => 57005 -- hex constant syntax */ | |
| 2620 case 'x': return read_integer (readcharfun, 16); | |
| 2621 /* #b010 => 2 -- binary constant syntax */ | |
| 2622 case 'b': return read_integer (readcharfun, 2); | |
| 3543 | 2623 /* #r"raw\stringt" -- raw string syntax */ |
| 2624 case 'r': return read_raw_string(readcharfun); | |
| 428 | 2625 /* #s(foobar key1 val1 key2 val2) -- structure syntax */ |
| 2626 case 's': return read_structure (readcharfun); | |
| 2627 case '<': | |
| 2628 { | |
| 2629 unreadchar (readcharfun, c); | |
| 2630 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2631 list1 (build_msg_string ("Cannot read unreadable object"))); |
| 428 | 2632 } |
| 2633 #ifdef FEATUREP_SYNTAX | |
| 2634 case '+': | |
| 2635 case '-': | |
| 2636 { | |
| 456 | 2637 Lisp_Object feature_exp, obj, tem; |
| 428 | 2638 struct gcpro gcpro1, gcpro2; |
| 2639 | |
| 456 | 2640 feature_exp = read0(readcharfun); |
| 428 | 2641 obj = read0(readcharfun); |
| 2642 | |
| 2643 /* the call to `featurep' may GC. */ | |
| 456 | 2644 GCPRO2 (feature_exp, obj); |
| 2645 tem = call1 (Qfeaturep, feature_exp); | |
| 428 | 2646 UNGCPRO; |
| 2647 | |
| 2648 if (c == '+' && NILP(tem)) goto retry; | |
| 2649 if (c == '-' && !NILP(tem)) goto retry; | |
| 2650 return obj; | |
| 2651 } | |
| 2652 #endif | |
| 2653 case '0': case '1': case '2': case '3': case '4': | |
| 2654 case '5': case '6': case '7': case '8': case '9': | |
| 2655 /* Reader forms that can reuse previously read objects. */ | |
| 2656 { | |
| 2657 int n = 0; | |
| 2658 Lisp_Object found; | |
| 2659 | |
| 2660 /* Using read_integer() here is impossible, because it | |
| 2661 chokes on `='. Using parse_integer() is too hard. | |
| 2662 So we simply read it in, and ignore overflows, which | |
| 2663 is safe. */ | |
| 2664 while (c >= '0' && c <= '9') | |
| 2665 { | |
| 2666 n *= 10; | |
| 2667 n += c - '0'; | |
| 2668 c = readchar (readcharfun); | |
| 2669 } | |
| 2670 found = assq_no_quit (make_int (n), Vread_objects); | |
| 2671 if (c == '=') | |
| 2672 { | |
| 2673 /* #n=object returns object, but associates it with | |
| 2674 n for #n#. */ | |
| 2675 Lisp_Object obj; | |
| 2676 if (CONSP (found)) | |
| 2677 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2678 list2 (build_msg_string |
| 428 | 2679 ("Multiply defined symbol label"), |
| 2680 make_int (n))); | |
| 2681 obj = read0 (readcharfun); | |
| 2682 Vread_objects = Fcons (Fcons (make_int (n), obj), | |
| 2683 Vread_objects); | |
| 2684 return obj; | |
| 2685 } | |
| 2686 else if (c == '#') | |
| 2687 { | |
| 2688 /* #n# returns a previously read object. */ | |
| 2689 if (CONSP (found)) | |
| 2690 return XCDR (found); | |
| 2691 else | |
| 2692 return Fsignal (Qinvalid_read_syntax, | |
| 771 | 2693 list2 (build_msg_string |
| 428 | 2694 ("Undefined symbol label"), |
| 2695 make_int (n))); | |
| 2696 } | |
| 2697 return Fsignal (Qinvalid_read_syntax, | |
| 2698 list1 (build_string ("#"))); | |
| 2699 } | |
| 2700 default: | |
| 2701 { | |
| 2702 unreadchar (readcharfun, c); | |
| 2703 return Fsignal (Qinvalid_read_syntax, | |
| 2704 list1 (build_string ("#"))); | |
| 2705 } | |
| 2706 } | |
| 2707 } | |
| 2708 | |
| 2709 /* Quote */ | |
| 2710 case '\'': return list2 (Qquote, read0 (readcharfun)); | |
| 2711 | |
| 2712 #ifdef LISP_BACKQUOTES | |
| 2713 case '`': | |
| 2714 { | |
| 2715 Lisp_Object tem; | |
| 853 | 2716 int speccount = internal_bind_int (&new_backquote_flag, |
| 2717 1 + new_backquote_flag); | |
| 428 | 2718 tem = read0 (readcharfun); |
| 771 | 2719 unbind_to (speccount); |
| 428 | 2720 return list2 (Qbackquote, tem); |
| 2721 } | |
| 2722 | |
| 2723 case ',': | |
| 2724 { | |
| 2725 if (new_backquote_flag) | |
| 2726 { | |
| 2727 Lisp_Object comma_type = Qnil; | |
| 2728 int ch = readchar (readcharfun); | |
| 2729 | |
| 2730 if (ch == '@') | |
| 2731 comma_type = Qcomma_at; | |
| 2732 else if (ch == '.') | |
| 2733 comma_type = Qcomma_dot; | |
| 2734 else | |
| 2735 { | |
| 2736 if (ch >= 0) | |
| 2737 unreadchar (readcharfun, ch); | |
| 2738 comma_type = Qcomma; | |
| 2739 } | |
| 2740 return list2 (comma_type, read0 (readcharfun)); | |
| 2741 } | |
| 2742 else | |
| 2743 { | |
| 2744 /* YUCK. 99.999% backwards compatibility. The Right | |
| 2745 Thing(tm) is to signal an error here, because it's | |
| 2746 really invalid read syntax. Instead, this permits | |
| 2747 commas to begin symbols (unless they're inside | |
| 2748 backquotes). If an error is signalled here in the | |
| 2749 future, then commas should be invalid read syntax | |
| 2750 outside of backquotes anywhere they're found (i.e. | |
| 2751 they must be quoted in symbols) -- Stig */ | |
| 2752 return read_atom (readcharfun, c, 0); | |
| 2753 } | |
| 2754 } | |
| 2755 #endif | |
| 2756 | |
| 2757 case '?': | |
| 2758 { | |
| 2759 /* Evil GNU Emacs "character" (ie integer) syntax */ | |
| 2760 c = readchar (readcharfun); | |
| 2761 if (c < 0) | |
| 2762 return Fsignal (Qend_of_file, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 2763 | |
| 2764 if (c == '\\') | |
| 2765 c = read_escape (readcharfun); | |
| 4439 | 2766 if (c < 0) |
| 2767 return Fsignal (Qinvalid_read_syntax, list1 (READCHARFUN_MAYBE (readcharfun))); | |
| 428 | 2768 return make_char (c); |
| 2769 } | |
| 2770 | |
| 2771 case '\"': | |
| 3543 | 2772 /* String */ |
| 2773 return read_string(readcharfun, '\"', 0, 1); | |
| 428 | 2774 |
| 2775 default: | |
| 2776 { | |
| 2777 /* Ignore whitespace and control characters */ | |
| 2778 if (c <= 040) | |
| 2779 goto retry; | |
| 2780 return read_atom (readcharfun, c, 0); | |
| 2781 } | |
| 2782 } | |
| 2783 } | |
| 2784 | |
| 2785 | |
| 2786 | |
| 2787 #define LEAD_INT 1 | |
| 2788 #define DOT_CHAR 2 | |
| 2789 #define TRAIL_INT 4 | |
| 2790 #define E_CHAR 8 | |
| 2791 #define EXP_INT 16 | |
| 2792 | |
| 2793 int | |
| 442 | 2794 isfloat_string (const char *cp) |
| 428 | 2795 { |
| 2796 int state = 0; | |
| 867 | 2797 const Ibyte *ucp = (const Ibyte *) cp; |
| 428 | 2798 |
| 2799 if (*ucp == '+' || *ucp == '-') | |
| 2800 ucp++; | |
| 2801 | |
| 2802 if (*ucp >= '0' && *ucp <= '9') | |
| 2803 { | |
| 2804 state |= LEAD_INT; | |
| 2805 while (*ucp >= '0' && *ucp <= '9') | |
| 2806 ucp++; | |
| 2807 } | |
| 2808 if (*ucp == '.') | |
| 2809 { | |
| 2810 state |= DOT_CHAR; | |
| 2811 ucp++; | |
| 2812 } | |
| 2813 if (*ucp >= '0' && *ucp <= '9') | |
| 2814 { | |
| 2815 state |= TRAIL_INT; | |
| 2816 while (*ucp >= '0' && *ucp <= '9') | |
| 2817 ucp++; | |
| 2818 } | |
| 2819 if (*ucp == 'e' || *ucp == 'E') | |
| 2820 { | |
| 2821 state |= E_CHAR; | |
| 2822 ucp++; | |
| 2823 if ((*ucp == '+') || (*ucp == '-')) | |
| 2824 ucp++; | |
| 2825 } | |
| 2826 | |
| 2827 if (*ucp >= '0' && *ucp <= '9') | |
| 2828 { | |
| 2829 state |= EXP_INT; | |
| 2830 while (*ucp >= '0' && *ucp <= '9') | |
| 2831 ucp++; | |
| 2832 } | |
| 2833 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t') || (*ucp == '\n') | |
| 2834 || (*ucp == '\r') || (*ucp == '\f')) | |
| 2835 && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) | |
| 2836 || state == (DOT_CHAR|TRAIL_INT) | |
| 2837 || state == (LEAD_INT|E_CHAR|EXP_INT) | |
| 2838 || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) | |
| 2839 || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
| 2840 } | |
| 1983 | 2841 |
| 2842 #ifdef HAVE_RATIO | |
| 2843 int | |
| 2844 isratio_string (const char *cp) | |
| 2845 { | |
| 2010 | 2846 /* Possible minus/plus sign */ |
| 2847 if (*cp == '-' || *cp == '+') | |
| 1983 | 2848 cp++; |
| 2849 | |
| 2850 /* Numerator */ | |
| 2851 if (*cp < '0' || *cp > '9') | |
| 2852 return 0; | |
| 2853 | |
| 2854 do { | |
| 2855 cp++; | |
| 2856 } while (*cp >= '0' && *cp <= '9'); | |
| 2857 | |
| 2858 /* Slash */ | |
| 2859 if (*cp++ != '/') | |
| 2860 return 0; | |
| 2861 | |
| 2862 /* Denominator */ | |
| 2863 if (*cp < '0' || *cp > '9') | |
| 2864 return 0; | |
| 2865 | |
| 2866 do { | |
| 2867 cp++; | |
| 2868 } while (*cp >= '0' && *cp <= '9'); | |
| 2869 | |
| 2870 return *cp == '\0' || *cp == ' ' || *cp =='\t' || *cp == '\n' || | |
| 2871 *cp == '\r' || *cp == '\f'; | |
| 2872 } | |
| 2873 #endif | |
| 428 | 2874 |
| 2875 static void * | |
| 2876 sequence_reader (Lisp_Object readcharfun, | |
| 867 | 2877 Ichar terminator, |
| 428 | 2878 void *state, |
| 2879 void * (*conser) (Lisp_Object readcharfun, | |
| 2880 void *state, Charcount len)) | |
| 2881 { | |
| 2882 Charcount len; | |
| 2883 | |
| 2884 for (len = 0; ; len++) | |
| 2885 { | |
| 867 | 2886 Ichar ch; |
| 428 | 2887 |
| 2888 QUIT; | |
| 2889 ch = reader_nextchar (readcharfun); | |
| 2890 | |
| 2891 if (ch == terminator) | |
| 2892 return state; | |
| 2893 else | |
| 2894 unreadchar (readcharfun, ch); | |
| 2895 #ifdef FEATUREP_SYNTAX | |
| 2896 if (ch == ']') | |
| 442 | 2897 read_syntax_error ("\"]\" in a list"); |
| 428 | 2898 else if (ch == ')') |
| 442 | 2899 read_syntax_error ("\")\" in a vector"); |
| 428 | 2900 #endif |
| 2901 state = ((conser) (readcharfun, state, len)); | |
| 2902 } | |
| 2903 } | |
| 2904 | |
| 2905 | |
| 2906 struct read_list_state | |
| 2907 { | |
| 2908 Lisp_Object head; | |
| 2909 Lisp_Object tail; | |
| 2910 int length; | |
| 2911 int allow_dotted_lists; | |
| 867 | 2912 Ichar terminator; |
| 428 | 2913 }; |
| 2914 | |
| 2915 static void * | |
| 2286 | 2916 read_list_conser (Lisp_Object readcharfun, void *state, Charcount UNUSED (len)) |
| 428 | 2917 { |
| 2918 struct read_list_state *s = (struct read_list_state *) state; | |
| 2919 Lisp_Object elt; | |
| 2920 | |
| 2921 elt = read1 (readcharfun); | |
| 2922 | |
| 2923 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2924 { | |
| 2925 Lisp_Object tem = elt; | |
| 867 | 2926 Ichar ch; |
| 428 | 2927 |
| 2928 elt = XCDR (elt); | |
| 853 | 2929 free_cons (tem); |
| 428 | 2930 tem = Qnil; |
| 2931 ch = XCHAR (elt); | |
| 2932 #ifdef FEATUREP_SYNTAX | |
| 2933 if (ch == s->terminator) /* deal with #+, #- reader macros */ | |
| 2934 { | |
| 2935 unreadchar (readcharfun, s->terminator); | |
| 2936 goto done; | |
| 2937 } | |
| 2938 else if (ch == ']') | |
| 442 | 2939 read_syntax_error ("']' in a list"); |
| 428 | 2940 else if (ch == ')') |
| 442 | 2941 read_syntax_error ("')' in a vector"); |
| 428 | 2942 else |
| 2943 #endif | |
| 2944 if (ch != '.') | |
| 563 | 2945 signal_error (Qinternal_error, "BUG! Internal reader error", elt); |
| 428 | 2946 else if (!s->allow_dotted_lists) |
| 442 | 2947 read_syntax_error ("\".\" in a vector"); |
| 428 | 2948 else |
| 2949 { | |
| 2950 if (!NILP (s->tail)) | |
| 2951 XCDR (s->tail) = read0 (readcharfun); | |
| 2952 else | |
| 2953 s->head = read0 (readcharfun); | |
| 2954 elt = read1 (readcharfun); | |
| 2955 if (CONSP (elt) && UNBOUNDP (XCAR (elt))) | |
| 2956 { | |
| 2957 ch = XCHAR (XCDR (elt)); | |
| 853 | 2958 free_cons (elt); |
| 428 | 2959 if (ch == s->terminator) |
| 2960 { | |
| 2961 unreadchar (readcharfun, s->terminator); | |
| 2962 goto done; | |
| 2963 } | |
| 2964 } | |
| 442 | 2965 read_syntax_error (". in wrong context"); |
| 428 | 2966 } |
| 2967 } | |
| 2968 | |
| 2969 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 2970 if (s->length == 1 && s->allow_dotted_lists && EQ (XCAR (s->head), Qfset)) | |
| 2971 { | |
| 2972 if (CONSP (elt) && EQ (XCAR (elt), Qquote) && CONSP (XCDR (elt))) | |
| 2973 Vcurrent_compiled_function_annotation = XCAR (XCDR (elt)); | |
| 2974 else | |
| 2975 Vcurrent_compiled_function_annotation = elt; | |
| 2976 } | |
| 2977 #endif | |
| 2978 | |
| 2979 elt = Fcons (elt, Qnil); | |
| 2980 if (!NILP (s->tail)) | |
| 2981 XCDR (s->tail) = elt; | |
| 2982 else | |
| 2983 s->head = elt; | |
| 2984 s->tail = elt; | |
| 2985 done: | |
| 2986 s->length++; | |
| 2987 return s; | |
| 2988 } | |
| 2989 | |
| 2990 | |
| 814 | 2991 /* allow_dotted_lists means that something like (foo bar . baz) |
| 2992 is acceptable. If -1, means check for starting with defun | |
| 2993 and make structure pure. (not implemented, probably for very | |
| 2994 good reasons) | |
| 2995 | |
| 2996 If check_for_doc_references, look for (#$ . INT) doc references | |
| 2997 in the list and record if load_force_doc_strings is non-zero. | |
| 2998 (Such doc references will be destroyed during the loadup phase | |
| 2999 by replacing with Qzero, because Snarf-documentation will fill | |
| 3000 them in again.) | |
| 3001 | |
| 3002 WARNING: If you set this, you sure as hell better not call | |
| 3003 free_list() on the returned list here. | |
| 3004 */ | |
| 428 | 3005 |
| 3006 static Lisp_Object | |
| 3007 read_list (Lisp_Object readcharfun, | |
| 867 | 3008 Ichar terminator, |
| 428 | 3009 int allow_dotted_lists, |
| 3010 int check_for_doc_references) | |
| 3011 { | |
| 3012 struct read_list_state s; | |
| 3013 struct gcpro gcpro1, gcpro2; | |
| 3014 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3015 Lisp_Object old_compiled_function_annotation = | |
| 3016 Vcurrent_compiled_function_annotation; | |
| 3017 #endif | |
| 3018 | |
| 3019 s.head = Qnil; | |
| 3020 s.tail = Qnil; | |
| 3021 s.length = 0; | |
| 3022 s.allow_dotted_lists = allow_dotted_lists; | |
| 3023 s.terminator = terminator; | |
| 3024 GCPRO2 (s.head, s.tail); | |
| 3025 | |
| 3026 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3027 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3028 Vcurrent_compiled_function_annotation = old_compiled_function_annotation; | |
| 3029 #endif | |
| 3030 | |
| 3031 if ((purify_flag || load_force_doc_strings) && check_for_doc_references) | |
| 3032 { | |
| 3033 /* check now for any doc string references and record them | |
| 3034 for later. */ | |
| 3035 Lisp_Object tail; | |
| 3036 | |
| 3037 /* We might be dealing with an imperfect list so don't | |
| 3038 use LIST_LOOP */ | |
| 3039 for (tail = s.head; CONSP (tail); tail = XCDR (tail)) | |
| 3040 { | |
| 3041 Lisp_Object holding_cons = Qnil; | |
| 3042 | |
| 3043 { | |
| 3044 Lisp_Object elem = XCAR (tail); | |
| 3045 /* elem might be (#$ . INT) ... */ | |
| 3046 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3047 holding_cons = tail; | |
| 3048 /* or it might be (quote (#$ . INT)) i.e. | |
| 3049 (quote . ((#$ . INT) . nil)) in the case of | |
| 3050 `autoload' (autoload evaluates its arguments, while | |
| 3051 `defvar', `defun', etc. don't). */ | |
| 3052 if (CONSP (elem) && EQ (XCAR (elem), Qquote) | |
| 3053 && CONSP (XCDR (elem))) | |
| 3054 { | |
| 3055 elem = XCAR (XCDR (elem)); | |
| 3056 if (CONSP (elem) && EQ (XCAR (elem), Vload_file_name_internal)) | |
| 3057 holding_cons = XCDR (XCAR (tail)); | |
| 3058 } | |
| 3059 } | |
| 3060 | |
| 3061 if (CONSP (holding_cons)) | |
| 3062 { | |
| 3063 if (purify_flag) | |
| 3064 { | |
| 3065 if (NILP (Vinternal_doc_file_name)) | |
| 3066 /* We have not yet called Snarf-documentation, so | |
| 3067 assume this file is described in the DOC file | |
| 3068 and Snarf-documentation will fill in the right | |
| 3069 value later. For now, replace the whole list | |
| 3070 with 0. */ | |
| 3071 XCAR (holding_cons) = Qzero; | |
| 3072 else | |
| 3073 /* We have already called Snarf-documentation, so | |
| 3074 make a relative file name for this file, so it | |
| 3075 can be found properly in the installed Lisp | |
| 3076 directory. We don't use Fexpand_file_name | |
| 3077 because that would make the directory absolute | |
| 3078 now. */ | |
| 3079 XCAR (XCAR (holding_cons)) = | |
| 3080 concat2 (build_string ("../lisp/"), | |
| 3081 Ffile_name_nondirectory | |
| 3082 (Vload_file_name_internal)); | |
| 3083 } | |
| 3084 else | |
| 3085 /* Not pure. Just add to Vload_force_doc_string_list, | |
| 3086 and the string will be filled in properly in | |
| 3087 load_force_doc_string_unwind(). */ | |
| 3088 Vload_force_doc_string_list = | |
| 3089 /* We pass the cons that holds the (#$ . INT) so we | |
| 3090 can modify it in-place. */ | |
| 3091 Fcons (holding_cons, Vload_force_doc_string_list); | |
| 3092 } | |
| 3093 } | |
| 3094 } | |
| 3095 | |
| 3096 UNGCPRO; | |
| 3097 return s.head; | |
| 3098 } | |
| 3099 | |
| 3100 static Lisp_Object | |
| 3101 read_vector (Lisp_Object readcharfun, | |
| 867 | 3102 Ichar terminator) |
| 428 | 3103 { |
| 3104 Lisp_Object tem; | |
| 3105 Lisp_Object *p; | |
| 3106 int len; | |
| 3107 int i; | |
| 3108 struct read_list_state s; | |
| 3109 struct gcpro gcpro1, gcpro2; | |
| 3110 | |
| 3111 s.head = Qnil; | |
| 3112 s.tail = Qnil; | |
| 3113 s.length = 0; | |
| 3114 s.allow_dotted_lists = 0; | |
| 3115 GCPRO2 (s.head, s.tail); | |
| 3116 | |
| 3117 sequence_reader (readcharfun, terminator, &s, read_list_conser); | |
| 3118 | |
| 3119 UNGCPRO; | |
| 3120 tem = s.head; | |
| 3121 len = XINT (Flength (tem)); | |
| 3122 | |
| 814 | 3123 s.head = make_vector (len, Qnil); |
| 428 | 3124 |
| 3125 for (i = 0, p = &(XVECTOR_DATA (s.head)[0]); | |
| 3126 i < len; | |
| 3127 i++, p++) | |
| 3128 { | |
| 853 | 3129 Lisp_Object otem = tem; |
| 428 | 3130 tem = Fcar (tem); |
| 3131 *p = tem; | |
| 853 | 3132 tem = XCDR (otem); |
| 428 | 3133 free_cons (otem); |
| 3134 } | |
| 3135 return s.head; | |
| 3136 } | |
| 3137 | |
| 3138 static Lisp_Object | |
| 867 | 3139 read_compiled_function (Lisp_Object readcharfun, Ichar terminator) |
| 428 | 3140 { |
| 3141 /* Accept compiled functions at read-time so that we don't | |
| 3142 have to build them at load-time. */ | |
| 3143 Lisp_Object stuff; | |
| 3144 Lisp_Object make_byte_code_args[COMPILED_DOMAIN + 1]; | |
| 3145 struct gcpro gcpro1; | |
| 3146 int len; | |
| 3147 int iii; | |
| 3148 int saw_a_doc_ref = 0; | |
| 3149 | |
| 3150 /* Note: we tell read_list not to search for doc references | |
| 3151 because we need to handle the "doc reference" for the | |
| 3152 instructions and constants differently. */ | |
| 3153 stuff = read_list (readcharfun, terminator, 0, 0); | |
| 3154 len = XINT (Flength (stuff)); | |
| 3155 if (len < COMPILED_STACK_DEPTH + 1 || len > COMPILED_DOMAIN + 1) | |
| 3156 return | |
| 442 | 3157 continuable_read_syntax_error ("#[...] used with wrong number of elements"); |
| 428 | 3158 |
| 3159 for (iii = 0; CONSP (stuff); iii++) | |
| 3160 { | |
| 853 | 3161 Lisp_Object victim = stuff; |
| 428 | 3162 make_byte_code_args[iii] = Fcar (stuff); |
| 3163 if ((purify_flag || load_force_doc_strings) | |
| 3164 && CONSP (make_byte_code_args[iii]) | |
| 3165 && EQ (XCAR (make_byte_code_args[iii]), Vload_file_name_internal)) | |
| 3166 { | |
| 3167 if (purify_flag && iii == COMPILED_DOC_STRING) | |
| 3168 { | |
| 3169 /* same as in read_list(). */ | |
| 3170 if (NILP (Vinternal_doc_file_name)) | |
| 3171 make_byte_code_args[iii] = Qzero; | |
| 3172 else | |
| 3173 XCAR (make_byte_code_args[iii]) = | |
| 3174 concat2 (build_string ("../lisp/"), | |
| 3175 Ffile_name_nondirectory | |
| 3176 (Vload_file_name_internal)); | |
| 3177 } | |
| 3178 else | |
| 3179 saw_a_doc_ref = 1; | |
| 3180 } | |
| 3181 stuff = Fcdr (stuff); | |
| 3182 free_cons (victim); | |
| 3183 } | |
| 3184 GCPRO1 (make_byte_code_args[0]); | |
| 3185 gcpro1.nvars = len; | |
| 3186 | |
| 3187 /* v18 or v19 bytecode file. Need to Ebolify. */ | |
| 3188 if (load_byte_code_version < 20 && VECTORP (make_byte_code_args[2])) | |
| 3189 ebolify_bytecode_constants (make_byte_code_args[2]); | |
| 3190 | |
| 3191 /* make-byte-code looks at purify_flag, which should have the same | |
| 3192 * value as our "read-pure" argument */ | |
| 3193 stuff = Fmake_byte_code (len, make_byte_code_args); | |
| 3194 XCOMPILED_FUNCTION (stuff)->flags.ebolified = (load_byte_code_version < 20); | |
| 3195 if (saw_a_doc_ref) | |
| 3196 Vload_force_doc_string_list = Fcons (stuff, Vload_force_doc_string_list); | |
| 3197 UNGCPRO; | |
| 3198 return stuff; | |
| 3199 } | |
| 3200 | |
| 3201 | |
| 3202 | |
| 3203 void | |
| 3204 init_lread (void) | |
| 3205 { | |
| 3206 Vvalues = Qnil; | |
| 3207 | |
| 3208 load_in_progress = 0; | |
| 3209 | |
| 3210 Vload_descriptor_list = Qnil; | |
| 3211 | |
| 3212 /* kludge: locate-file does not work for a null load-path, even if | |
| 3213 the file name is absolute. */ | |
| 3214 | |
| 3215 Vload_path = Fcons (build_string (""), Qnil); | |
| 3216 | |
| 3217 /* This used to get initialized in init_lread because all streams | |
| 3218 got closed when dumping occurs. This is no longer true -- | |
| 3219 Vread_buffer_stream is a resizing output stream, and there is no | |
| 3220 reason to close it at dump-time. | |
| 3221 | |
| 3222 Vread_buffer_stream is set to Qnil in vars_of_lread, and this | |
| 3223 will initialize it only once, at dump-time. */ | |
| 3224 if (NILP (Vread_buffer_stream)) | |
| 3225 Vread_buffer_stream = make_resizing_buffer_output_stream (); | |
| 3226 | |
| 3227 Vload_force_doc_string_list = Qnil; | |
| 3228 } | |
| 3229 | |
| 3230 void | |
| 3231 syms_of_lread (void) | |
| 3232 { | |
| 3233 DEFSUBR (Fread); | |
| 3234 DEFSUBR (Fread_from_string); | |
| 3235 DEFSUBR (Fload_internal); | |
| 3236 DEFSUBR (Flocate_file); | |
| 3237 DEFSUBR (Flocate_file_clear_hashing); | |
| 3238 DEFSUBR (Feval_buffer); | |
| 3239 DEFSUBR (Feval_region); | |
| 3240 | |
| 563 | 3241 DEFSYMBOL (Qstandard_input); |
| 3242 DEFSYMBOL (Qread_char); | |
| 3243 DEFSYMBOL (Qload); | |
| 1292 | 3244 DEFSYMBOL (Qload_internal); |
| 563 | 3245 DEFSYMBOL (Qfset); |
| 428 | 3246 |
| 3247 #ifdef LISP_BACKQUOTES | |
| 563 | 3248 DEFSYMBOL (Qbackquote); |
| 428 | 3249 defsymbol (&Qbacktick, "`"); |
| 3250 defsymbol (&Qcomma, ","); | |
| 3251 defsymbol (&Qcomma_at, ",@"); | |
| 3252 defsymbol (&Qcomma_dot, ",."); | |
| 3253 #endif | |
| 3254 | |
| 563 | 3255 DEFSYMBOL (Qexists); |
| 3256 DEFSYMBOL (Qreadable); | |
| 3257 DEFSYMBOL (Qwritable); | |
| 3258 DEFSYMBOL (Qexecutable); | |
| 428 | 3259 } |
| 3260 | |
| 3261 void | |
| 3262 structure_type_create (void) | |
| 3263 { | |
| 3264 the_structure_type_dynarr = Dynarr_new (structure_type); | |
| 3265 } | |
| 3266 | |
| 3267 void | |
| 3268 reinit_vars_of_lread (void) | |
| 3269 { | |
| 3270 Vread_buffer_stream = Qnil; | |
| 3271 staticpro_nodump (&Vread_buffer_stream); | |
| 3272 } | |
| 3273 | |
| 3274 void | |
| 3275 vars_of_lread (void) | |
| 3276 { | |
| 3277 DEFVAR_LISP ("values", &Vvalues /* | |
| 3278 List of values of all expressions which were read, evaluated and printed. | |
| 3279 Order is reverse chronological. | |
| 3280 */ ); | |
| 3281 | |
| 3282 DEFVAR_LISP ("standard-input", &Vstandard_input /* | |
| 3283 Stream for read to get input from. | |
| 3284 See documentation of `read' for possible values. | |
| 3285 */ ); | |
| 3286 Vstandard_input = Qt; | |
| 3287 | |
| 3288 DEFVAR_LISP ("load-path", &Vload_path /* | |
| 3289 *List of directories to search for files to load. | |
| 3290 Each element is a string (directory name) or nil (try default directory). | |
| 3291 | |
| 3292 Note that the elements of this list *may not* begin with "~", so you must | |
| 3293 call `expand-file-name' on them before adding them to this list. | |
| 3294 | |
| 3295 Initialized based on EMACSLOADPATH environment variable, if any, | |
| 3296 otherwise to default specified in by file `paths.h' when XEmacs was built. | |
| 3297 If there were no paths specified in `paths.h', then XEmacs chooses a default | |
| 3298 value for this variable by looking around in the file-system near the | |
| 3299 directory in which the XEmacs executable resides. | |
| 3300 */ ); | |
| 3301 Vload_path = Qnil; | |
| 3302 | |
| 3303 /* xxxDEFVAR_LISP ("dump-load-path", &Vdump_load_path, | |
| 3304 "*Location of lisp files to be used when dumping ONLY."); */ | |
| 3305 | |
| 3306 DEFVAR_BOOL ("load-in-progress", &load_in_progress /* | |
| 3307 Non-nil iff inside of `load'. | |
| 3308 */ ); | |
| 3309 | |
| 2548 | 3310 DEFVAR_LISP ("load-suppress-alist", &Vload_suppress_alist /* |
| 3311 An alist of expressions controlling whether particular files can be loaded. | |
| 3312 Each element looks like (FILENAME EXPR). | |
| 3313 FILENAME should be a full pathname, but without the .el suffix. | |
| 3314 When `load' is run and is about to load the specified file, it evaluates | |
| 3315 the form to determine if the file can be loaded. | |
| 3316 This variable is normally initialized automatically. | |
| 3317 */ ); | |
| 3318 Vload_suppress_alist = Qnil; | |
| 3319 | |
| 428 | 3320 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist /* |
| 3321 An alist of expressions to be evalled when particular files are loaded. | |
| 3322 Each element looks like (FILENAME FORMS...). | |
| 3323 When `load' is run and the file-name argument is FILENAME, | |
| 3324 the FORMS in the corresponding element are executed at the end of loading. | |
| 3325 | |
| 3326 FILENAME must match exactly! Normally FILENAME is the name of a library, | |
| 3327 with no directory specified, since that is how `load' is normally called. | |
| 3328 An error in FORMS does not undo the load, | |
| 3329 but does prevent execution of the rest of the FORMS. | |
| 3330 */ ); | |
| 3331 Vafter_load_alist = Qnil; | |
| 3332 | |
| 3333 DEFVAR_BOOL ("load-warn-when-source-newer", &load_warn_when_source_newer /* | |
| 3334 *Whether `load' should check whether the source is newer than the binary. | |
| 3335 If this variable is true, then when a `.elc' file is being loaded and the | |
| 3336 corresponding `.el' is newer, a warning message will be printed. | |
| 3337 */ ); | |
| 1261 | 3338 load_warn_when_source_newer = 1; |
| 428 | 3339 |
| 3340 DEFVAR_BOOL ("load-warn-when-source-only", &load_warn_when_source_only /* | |
| 3341 *Whether `load' should warn when loading a `.el' file instead of an `.elc'. | |
| 3342 If this variable is true, then when `load' is called with a filename without | |
| 3343 an extension, and the `.elc' version doesn't exist but the `.el' version does, | |
| 3344 then a message will be printed. If an explicit extension is passed to `load', | |
| 3345 no warning will be printed. | |
| 3346 */ ); | |
| 3347 load_warn_when_source_only = 0; | |
| 3348 | |
| 3349 DEFVAR_BOOL ("load-ignore-elc-files", &load_ignore_elc_files /* | |
| 3350 *Whether `load' should ignore `.elc' files when a suffix is not given. | |
| 3351 This is normally used only to bootstrap the `.elc' files when building XEmacs. | |
| 3352 */ ); | |
| 3353 load_ignore_elc_files = 0; | |
| 3354 | |
| 1123 | 3355 DEFVAR_BOOL ("load-ignore-out-of-date-elc-files", |
| 3356 &load_ignore_out_of_date_elc_files /* | |
| 3357 *Whether `load' should ignore out-of-date `.elc' files when no suffix is given. | |
| 3358 This is normally used when compiling packages of elisp files that may have | |
| 3359 complex dependencies. Ignoring all elc files with `load-ignore-elc-files' | |
| 3360 would also be safe, but much slower. | |
| 3361 */ ); | |
| 3362 load_ignore_out_of_date_elc_files = 0; | |
| 3363 | |
| 3364 DEFVAR_BOOL ("load-always-display-messages", | |
| 3365 &load_always_display_messages /* | |
| 3366 *Whether `load' should always display loading messages. | |
| 3367 If this is true, every file loaded will be shown, regardless of the setting | |
| 3368 of the NOMESSAGE parameter, and even when files are loaded indirectly, e.g. | |
| 2857 | 3369 due to `require'. |
| 1123 | 3370 */ ); |
| 3371 load_always_display_messages = 0; | |
| 3372 | |
| 3373 DEFVAR_BOOL ("load-show-full-path-in-messages", | |
| 3374 &load_show_full_path_in_messages /* | |
| 3375 *Whether `load' should show the full path in all loading messages. | |
| 3376 */ ); | |
| 3377 load_show_full_path_in_messages = 0; | |
| 3378 | |
| 428 | 3379 #ifdef LOADHIST |
| 3380 DEFVAR_LISP ("load-history", &Vload_history /* | |
| 3381 Alist mapping source file names to symbols and features. | |
| 3382 Each alist element is a list that starts with a file name, | |
| 3383 except for one element (optional) that starts with nil and describes | |
| 3384 definitions evaluated from buffers not visiting files. | |
| 3385 The remaining elements of each list are symbols defined as functions | |
| 3386 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'. | |
| 3387 */ ); | |
| 3388 Vload_history = Qnil; | |
| 3389 | |
| 3390 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list /* | |
| 3391 Used for internal purposes by `load'. | |
| 3392 */ ); | |
| 3393 Vcurrent_load_list = Qnil; | |
| 3394 #endif | |
| 3395 | |
| 3396 DEFVAR_LISP ("load-file-name", &Vload_file_name /* | |
| 3397 Full name of file being loaded by `load'. | |
| 3398 */ ); | |
| 3399 Vload_file_name = Qnil; | |
| 3400 | |
| 3401 DEFVAR_LISP ("load-read-function", &Vload_read_function /* | |
| 3402 Function used by `load' and `eval-region' for reading expressions. | |
| 3403 The default is nil, which means use the function `read'. | |
| 3404 */ ); | |
| 3405 Vload_read_function = Qnil; | |
| 3406 | |
| 3407 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings /* | |
| 3408 Non-nil means `load' should force-load all dynamic doc strings. | |
| 3409 This is useful when the file being loaded is a temporary copy. | |
| 3410 */ ); | |
| 3411 load_force_doc_strings = 0; | |
| 3412 | |
| 3413 /* See read_escape(). */ | |
| 3414 #if 0 | |
| 3415 /* Used to be named `puke-on-fsf-keys' */ | |
| 3416 DEFVAR_BOOL ("fail-on-bucky-bit-character-escapes", | |
| 3417 &fail_on_bucky_bit_character_escapes /* | |
| 3418 Whether `read' should signal an error when it encounters unsupported | |
| 3419 character escape syntaxes or just read them incorrectly. | |
| 3420 */ ); | |
| 3421 fail_on_bucky_bit_character_escapes = 0; | |
| 3422 #endif | |
| 3423 | |
| 3424 /* This must be initialized in init_lread otherwise it may start out | |
| 3425 with values saved when the image is dumped. */ | |
| 3426 staticpro (&Vload_descriptor_list); | |
| 3427 | |
| 3428 /* Initialized in init_lread. */ | |
| 3429 staticpro (&Vload_force_doc_string_list); | |
| 3430 | |
| 3431 Vload_file_name_internal = Qnil; | |
| 3432 staticpro (&Vload_file_name_internal); | |
| 3433 | |
| 3434 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 3435 Vcurrent_compiled_function_annotation = Qnil; | |
| 3436 staticpro (&Vcurrent_compiled_function_annotation); | |
| 3437 #endif | |
| 3438 | |
| 3439 /* So that early-early stuff will work */ | |
| 1292 | 3440 Ffset (Qload, Qload_internal); |
| 428 | 3441 |
| 3442 #ifdef FEATUREP_SYNTAX | |
| 563 | 3443 DEFSYMBOL (Qfeaturep); |
| 771 | 3444 Fprovide (intern ("xemacs")); |
| 428 | 3445 #ifdef INFODOCK |
| 771 | 3446 Fprovide (intern ("infodock")); |
| 428 | 3447 #endif /* INFODOCK */ |
| 3448 #endif /* FEATUREP_SYNTAX */ | |
| 3449 | |
| 3450 #ifdef LISP_BACKQUOTES | |
| 3451 old_backquote_flag = new_backquote_flag = 0; | |
| 3452 #endif | |
| 3453 | |
| 3454 #ifdef I18N3 | |
| 3455 Vfile_domain = Qnil; | |
| 3456 #endif | |
| 3457 | |
| 3458 Vread_objects = Qnil; | |
| 3459 staticpro (&Vread_objects); | |
| 3460 | |
| 3461 Vlocate_file_hash_table = make_lisp_hash_table (200, | |
| 3462 HASH_TABLE_NON_WEAK, | |
| 3463 HASH_TABLE_EQUAL); | |
| 3464 staticpro (&Vlocate_file_hash_table); | |
| 3465 #ifdef DEBUG_XEMACS | |
| 3466 symbol_value (XSYMBOL (intern ("Vlocate-file-hash-table"))) | |
| 3467 = Vlocate_file_hash_table; | |
| 3468 #endif | |
| 3469 } |