1 /* Lisp parsing and input streams.
2 Copyright (C) 1985-1989, 1992-1995 Free Software Foundation, Inc.
3 Copyright (C) 1995 Tinker Systems.
4 Copyright (C) 1996 Ben Wing.
5 Copyright (C) 2004 Steve Youngs.
7 This file is part of SXEmacs
9 SXEmacs is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 SXEmacs is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Synched up with: Mule 2.0, FSF 19.30. */
25 /* This file has been Mule-ized. */
36 #include "mule/file-coding.h"
42 Lisp_Object Qread_char, Qstandard_input;
43 Lisp_Object Qvariable_documentation;
44 #define LISP_BACKQUOTES
45 #ifdef LISP_BACKQUOTES
47 Nonzero means inside a new-style backquote
48 with no surrounding parentheses.
49 Fread initializes this to zero, so we need not specbind it
50 or worry about what happens to it when there is an error.
53 Nested backquotes are perfectly legal and fail utterly with
55 static int new_backquote_flag, old_backquote_flag;
56 Lisp_Object Qbackquote, Qbacktick, Qcomma, Qcomma_at, Qcomma_dot;
58 Lisp_Object Qvariable_domain; /* I18N3 */
59 Lisp_Object Vvalues, Vstandard_input, Vafter_load_alist;
60 Lisp_Object Qcurrent_load_list;
61 Lisp_Object Qload, Qload_file_name;
63 Lisp_Object Vload_suppress_alist;
65 /* Hash-table that maps directory names to hashes of their contents. */
66 static Lisp_Object Vlocate_file_hash_table;
68 Lisp_Object Qexists, Qreadable, Qwritable, Qexecutable;
70 Lisp_Object Vureaders;
72 /* See read_escape() for an explanation of this. */
74 int fail_on_bucky_bit_character_escapes;
77 /* This symbol is also used in fns.c */
78 #define FEATUREP_SYNTAX
80 #ifdef FEATUREP_SYNTAX
81 Lisp_Object Qfeaturep;
84 /* non-zero if inside `load' */
87 /* Whether Fload_internal() should check whether the .el is newer
89 int load_warn_when_source_newer;
90 /* Whether Fload_internal() should check whether the .elc doesn't exist */
91 int load_warn_when_source_only;
92 /* Whether Fload_internal() should ignore .elc files when no suffix is given */
93 int load_ignore_elc_files;
95 /* Search path for files to be loaded. */
96 Lisp_Object Vload_path;
98 /* Search path for files when dumping. */
99 /* Lisp_Object Vdump_load_path; */
101 /* This is the user-visible association list that maps features to
102 lists of defs in their load files. */
103 Lisp_Object Vload_history;
105 /* This is used to build the load history. */
106 Lisp_Object Vcurrent_load_list;
108 /* Name of file actually being read by `load'. */
109 Lisp_Object Vload_file_name;
111 /* Same as Vload_file_name but not Lisp-accessible. This ensures that
112 our #$ checks are reliable. */
113 Lisp_Object Vload_file_name_internal;
115 Lisp_Object Vload_file_name_internal_the_purecopy;
117 /* Function to use for reading, in `load' and friends. */
118 Lisp_Object Vload_read_function;
120 /* The association list of objects read with the #n=object form.
121 Each member of the list has the form (n . object), and is used to
122 look up the object for the corresponding #n# construct.
123 It must be set to nil before all top-level calls to read0. */
124 Lisp_Object Vread_objects;
126 /* Nonzero means load should forcibly load all dynamic doc strings. */
127 /* Note that this always happens (with some special behavior) when
128 purify_flag is set. */
129 static int load_force_doc_strings;
131 /* List of descriptors now open for Fload_internal. */
132 static Lisp_Object Vload_descriptor_list;
134 /* In order to implement "load_force_doc_strings", we keep
135 a list of all the compiled-function objects and such
136 that we have created in the process of loading this file.
139 We specbind this just like Vload_file_name, so there's no
140 problems with recursive loading. */
141 static Lisp_Object Vload_force_doc_string_list;
143 /* A resizing-buffer stream used to temporarily hold data while reading */
144 static Lisp_Object Vread_buffer_stream;
146 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
147 Lisp_Object Vcurrent_compiled_function_annotation;
150 static int load_byte_code_version;
152 /* An array describing all known built-in structure types */
153 static structure_type_dynarr *the_structure_type_dynarr;
155 #if 0 /* FSF defun hack */
156 /* When nonzero, read conses in pure space */
157 static int read_pure;
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;
166 /* parser hook for resclass objects */
167 int(*ase_resc_rng_pred_f)(const char *cp) = NULL;
168 int(*ase_resc_elm_pred_f)(const char *cp) = NULL;
169 Lisp_Object(*ase_resc_rng_f)(char *cp) = NULL;
170 Lisp_Object(*ase_resc_elm_f)(char *cp) = NULL;
171 /* parser hook for perms */
172 Lisp_Object(*ase_permutation_f)(Lisp_Object);
175 #if 0 /* More FSF implementation kludges. */
176 /* In order to implement load-force-doc-string, FSF saves the
177 #@-quoted string when it's seen, and goes back and retrieves
180 This approach is not only kludgy, but it in general won't work
181 correctly because there's no stack of remembered #@-quoted-strings
182 and those strings don't generally appear in the file in the same
183 order as their #$ references. (Yes, that is amazingly stupid too.
185 It would be trivially easy to always encode the #@ string
186 [which is a comment, anyway] in the middle of the (#$ . INT) cons
187 reference. That way, it would be really easy to implement
188 load-force-doc-string in a non-kludgy way by just retrieving the
189 string immediately, because it's delivered on a silver platter.)
191 And finally, this stupid approach doesn't work under Mule, or
192 under MS-DOS or Windows NT, or under VMS, or any other place
193 where you either can't do an ftell() or don't get back a byte
196 Oh, and one more lossage in this approach: If you attempt to
197 dump any ELC files that were compiled with `byte-compile-dynamic'
198 (as opposed to just `byte-compile-dynamic-docstring'), you
199 get hosed. FMH! (as the illustrious JWZ was prone to utter)
201 The approach we use is clean, solves all of these problems, and is
202 probably easier to implement anyway. We just save a list of all
203 the containing objects that have (#$ . INT) conses in them (this
204 will only be compiled-function objects and lists), and when the
205 file is finished loading, we go through and fill in all the
206 doc strings at once. */
208 /* This contains the last string skipped with #@. */
209 static char *saved_doc_string;
210 /* Length of buffer allocated in saved_doc_string. */
211 static int saved_doc_string_size;
212 /* Length of actual data in saved_doc_string. */
213 static int saved_doc_string_length;
214 /* This is the file position that string came from. */
215 static int saved_doc_string_position;
218 EXFUN(Fread_from_string, 3);
220 /* When errors are signaled, the actual readcharfun should not be used
221 as an argument if it is an lstream, so that lstreams don't escape
222 to the Lisp level. */
223 #define READCHARFUN_MAYBE(x) (LSTREAMP (x) \
224 ? (build_string ("internal input stream")) \
227 static DOESNT_RETURN read_syntax_error(const char *string)
229 signal_error(Qinvalid_read_syntax,
230 list1(build_translated_string(string)));
233 static Lisp_Object continuable_read_syntax_error(const char *string)
235 return Fsignal(Qinvalid_read_syntax,
236 list1(build_translated_string(string)));
239 /* Handle unreading and rereading of characters. */
240 static Emchar readchar(Lisp_Object readcharfun)
242 /* This function can GC */
244 if (BUFFERP(readcharfun)) {
246 struct buffer *b = XBUFFER(readcharfun);
248 if (!BUFFER_LIVE_P(b))
249 error("Reading from killed buffer");
251 if (BUF_PT(b) >= BUF_ZV(b))
253 c = BUF_FETCH_CHAR(b, BUF_PT(b));
254 BUF_SET_PT(b, BUF_PT(b) + 1);
257 } else if (LSTREAMP(readcharfun)) {
258 Emchar c = Lstream_get_emchar(XLSTREAM(readcharfun));
259 #ifdef DEBUG_SXEMACS /* testing Mule */
260 static int testing_mule = 0; /* Change via debugger */
262 if (c >= 0x20 && c <= 0x7E)
267 stderr_out("\\%o ", c);
269 #endif /* testing Mule */
271 } else if (MARKERP(readcharfun)) {
273 Bufpos mpos = marker_position(readcharfun);
274 struct buffer *inbuffer = XMARKER(readcharfun)->buffer;
276 if (mpos >= BUF_ZV(inbuffer))
278 c = BUF_FETCH_CHAR(inbuffer, mpos);
279 set_marker_position(readcharfun, mpos + 1);
282 Lisp_Object tem = call0(readcharfun);
284 if (!CHAR_OR_CHAR_INTP(tem))
286 return XCHAR_OR_CHAR_INT(tem);
290 /* Unread the character C in the way appropriate for the stream READCHARFUN.
291 If the stream is a user function, call it with the char as argument. */
293 static void unreadchar(Lisp_Object readcharfun, Emchar c)
296 /* Don't back up the pointer if we're unreading the end-of-input mark,
297 since readchar didn't advance it when we read it. */
299 else if (BUFFERP(readcharfun))
300 BUF_SET_PT(XBUFFER(readcharfun),
301 BUF_PT(XBUFFER(readcharfun)) - 1);
302 else if (LSTREAMP(readcharfun)) {
303 Lstream_unget_emchar(XLSTREAM(readcharfun), c);
304 #ifdef DEBUG_SXEMACS /* testing Mule */
306 static int testing_mule = 0; /* Set this using debugger */
309 (c >= 0x20 && c <= 0x7E) ? "UU%c" :
310 ((c == '\n') ? "UU\\n\n" : "UU\\%o"),
314 } else if (MARKERP(readcharfun))
315 set_marker_position(readcharfun,
316 marker_position(readcharfun) - 1);
318 call1(readcharfun, make_char(c));
321 static Lisp_Object read0(Lisp_Object readcharfun);
322 static Lisp_Object read1(Lisp_Object readcharfun);
323 /* allow_dotted_lists means that something like (foo bar . baz)
324 is acceptable. If -1, means check for starting with defun
325 and make structure pure. (not implemented, probably for very
329 If check_for_doc_references, look for (#$ . INT) doc references
330 in the list and record if load_force_doc_strings is non-zero.
331 (Such doc references will be destroyed during the loadup phase
332 by replacing with Qzero, because Snarf-documentation will fill
335 WARNING: If you set this, you sure as hell better not call
336 free_list() on the returned list here. */
338 static Lisp_Object read_list(Lisp_Object readcharfun,
340 int allow_dotted_lists,
341 int check_for_doc_references);
343 static void readevalloop(Lisp_Object readcharfun,
344 Lisp_Object sourcefile,
345 Lisp_Object(*evalfun) (Lisp_Object), int printflag);
347 static Lisp_Object load_unwind(Lisp_Object stream)
348 { /* used as unwind-protect function in load */
349 Lstream_close(XLSTREAM(stream));
350 if (--load_in_progress < 0)
351 load_in_progress = 0;
355 static Lisp_Object load_descriptor_unwind(Lisp_Object oldlist)
357 Vload_descriptor_list = oldlist;
361 static Lisp_Object load_file_name_internal_unwind(Lisp_Object oldval)
363 Vload_file_name_internal = oldval;
368 load_file_name_internal_the_purecopy_unwind(Lisp_Object oldval)
370 Vload_file_name_internal_the_purecopy = oldval;
374 static Lisp_Object load_byte_code_version_unwind(Lisp_Object oldval)
376 load_byte_code_version = XINT(oldval);
381 suppressedp_loop(int len, char *nonreloc, Lisp_Object reloc)
383 EXTERNAL_LIST_LOOP_2(_acons_, Vload_suppress_alist) {
384 if (CONSP(_acons_) && STRINGP(XCAR(_acons_))) {
385 Lisp_Object name = XCAR(_acons_);
386 if (XSTRING_LENGTH(name) == len &&
387 !memcmp(XSTRING_DATA(name), nonreloc, len)) {
392 val = Feval(XCDR(_acons_));
404 suppressedp(char *nonreloc, Lisp_Object reloc)
406 /* Check if NONRELOC/RELOC (an absolute filename) is suppressed according
407 to load-suppress-alist. */
411 nonreloc = (char*)XSTRING_DATA(reloc);
412 len = XSTRING_LENGTH(reloc);
414 len = strlen(nonreloc);
416 if (len >= 4 && !strcmp(nonreloc + len - 4, ".elc"))
418 else if (len >= 3 && !strcmp(nonreloc + len - 3, ".el"))
421 return suppressedp_loop(len, nonreloc, reloc);
424 /* The plague is coming.
426 Ring around the rosy, pocket full of posy,
427 Ashes ashes, they all fall down.
429 void ebolify_bytecode_constants(Lisp_Object vector)
431 int len = XVECTOR_LENGTH(vector);
434 for (i = 0; i < len; i++) {
435 Lisp_Object el = XVECTOR_DATA(vector)[i];
437 /* We don't check for `eq', `equal', and the others that have
438 bytecode opcodes. This might lose if someone passes #'eq or
439 something to `funcall', but who would really do that? As
440 they say in law, we've made a "good-faith effort" to
441 unfuckify ourselves. And doing it this way avoids screwing
442 up args to `make-hash-table' and such. As it is, we have to
443 add an extra Ebola check in decode_weak_list_type(). --ben */
446 else if (EQ(el, Qdelq))
449 /* I think this is a bad idea because it will probably mess
451 else if (EQ(el, Qdelete))
454 else if (EQ(el, Qrassq))
456 else if (EQ(el, Qrassoc))
459 XVECTOR_DATA(vector)[i] = el;
463 static Lisp_Object pas_de_lache_ici(int fd, Lisp_Object victim)
468 if (!INTP(XCDR(victim)))
469 signal_simple_error("Bogus doc string reference", victim);
470 pos = XINT(XCDR(victim));
472 pos = -pos; /* kludge to mark a user variable */
473 tem = unparesseuxify_doc_string(fd, pos, 0, Vload_file_name_internal);
475 signal_error(Qerror, tem);
479 static Lisp_Object load_force_doc_string_unwind(Lisp_Object oldlist)
482 Lisp_Object list = Vload_force_doc_string_list;
484 int fd = XINT(XCAR(Vload_descriptor_list));
487 /* restore the old value first just in case an error occurs. */
488 Vload_force_doc_string_list = oldlist;
490 LIST_LOOP(tail, list) {
491 Lisp_Object john = Fcar(tail);
493 assert(CONSP(XCAR(john)));
494 assert(!purify_flag); /* should have been handled in read_list() */
495 XCAR(john) = pas_de_lache_ici(fd, XCAR(john));
499 assert(COMPILED_FUNCTIONP(john));
500 if (CONSP(XCOMPILED_FUNCTION(john)->instructions)) {
501 struct gcpro ngcpro1;
502 Lisp_Object juan = (pas_de_lache_ici
504 XCOMPILED_FUNCTION(john)->
512 ("invalid lazy-loaded byte code",
514 XCOMPILED_FUNCTION(john)->instructions =
516 /* v18 or v19 bytecode file. Need to Ebolify. */
517 if (XCOMPILED_FUNCTION(john)->flags.ebolified
518 && VECTORP(XCDR(ivan)))
519 ebolify_bytecode_constants(XCDR(ivan));
520 XCOMPILED_FUNCTION(john)->constants =
525 compiled_function_documentation(XCOMPILED_FUNCTION
528 assert(!purify_flag); /* should have been handled in
529 read_compiled_function() */
530 doc = pas_de_lache_ici(fd, doc);
531 set_compiled_function_documentation
532 (XCOMPILED_FUNCTION(john), doc);
544 /* Close all descriptors in use for Fload_internal.
545 This is used when starting a subprocess. */
547 void close_load_descs(void)
550 LIST_LOOP(tail, Vload_descriptor_list)
551 close(XINT(XCAR(tail)));
555 Lisp_Object Vfile_domain;
557 Lisp_Object restore_file_domain(Lisp_Object val)
564 DEFUN("load-internal", Fload_internal, 1, 6, 0, /*
565 Execute a file of Lisp code named FILE; no coding-system frobbing.
566 This function is identical to `load' except for the handling of the
567 CODESYS and USED-CODESYS arguments under SXEmacs/Mule. (When Mule
568 support is not present, both functions are identical and ignore the
569 CODESYS and USED-CODESYS arguments.)
571 If support for Mule exists in this Emacs, the file is decoded
572 according to CODESYS; if omitted, no conversion happens. If
573 USED-CODESYS is non-nil, it should be a symbol, and the actual coding
574 system that was used for the decoding is stored into it. It will in
575 general be different from CODESYS if CODESYS specifies automatic
576 encoding detection or end-of-line detection.
578 (file, noerror, nomessage, nosuffix, codesys, used_codesys))
580 /* This function can GC */
582 int speccount = specpdl_depth();
584 Lisp_Object newer = Qnil;
585 Lisp_Object handler = Qnil;
586 Lisp_Object found = Qnil;
587 struct gcpro gcpro1, gcpro2, gcpro3;
589 int message_p = NILP(nomessage);
590 /*#ifdef DEBUG_SXEMACS*/
591 static Lisp_Object last_file_loaded;
594 GCPRO3(file, newer, found);
598 /*#ifdef DEBUG_SXEMACS*/
599 if (purify_flag && noninteractive) {
601 last_file_loaded = file;
603 /*#endif / * DEBUG_SXEMACS */
605 /* If file name is magic, call the handler. */
606 handler = Ffind_file_name_handler(file, Qload);
608 RETURN_UNGCPRO(call5(handler, Qload, file, noerror,
609 nomessage, nosuffix));
611 /* Do this after the handler to avoid
612 the need to gcpro noerror, nomessage and nosuffix.
613 (Below here, we care only whether they are nil or not.) */
614 file = Fsubstitute_in_file_name(file);
616 if (!NILP(used_codesys))
617 CHECK_SYMBOL(used_codesys);
620 /* Avoid weird lossage with null string as arg,
621 since it would try to load a directory as a Lisp file.
623 if (XSTRING_LENGTH(file) > 0) {
627 fd = locate_file(Vload_path, file,
630 : build_string(load_ignore_elc_files
632 : ".elc:.el:")), &found, -1);
636 signal_file_error("Cannot open load file",
644 foundlen = XSTRING_LENGTH(found);
645 foundstr = (char *)alloca( foundlen+ 1);
646 strncpy(foundstr, (char *)XSTRING_DATA(found), foundlen+1);
649 /* The omniscient JWZ thinks this is worthless, but I beg to
651 if (load_ignore_elc_files) {
652 newer = Ffile_name_nondirectory(found);
653 } else if (load_warn_when_source_newer &&
654 !memcmp(".elc", foundstr + foundlen - 4, 4)) {
655 if (!fstat(fd, &s1)) { /* can't fail, right? */
657 /* temporarily hack the 'c' off the end of the
659 foundstr[foundlen - 1] = '\0';
660 result = sxemacs_stat(foundstr, &s2);
662 (unsigned)s1.st_mtime <
663 (unsigned)s2.st_mtime) {
664 Lisp_Object newer_name =
665 make_string((Bufbyte*)foundstr,
667 struct gcpro nngcpro1;
668 NNGCPRO1(newer_name);
669 newer = Ffile_name_nondirectory(
673 /* put the 'c' back on (kludge-o-rama) */
674 foundstr[foundlen - 1] = 'c';
676 } else if (load_warn_when_source_only &&
677 /* `found' ends in ".el" */
678 !memcmp(".el", foundstr + foundlen - 3, 3) &&
679 /* `file' does not end in ".el" */
681 XSTRING_DATA(file) + XSTRING_LENGTH(file) - 3,
686 if (!memcmp(".elc", foundstr + foundlen - 4, 4))
689 #define PRINT_LOADING_MESSAGE(done) \
691 if (load_ignore_elc_files) { \
693 message("Loading %s..." done, \
694 XSTRING_DATA(newer)); \
696 } else if (!NILP(newer)) { \
697 message("Loading %s..." done " (file %s is newer)", \
698 XSTRING_DATA(file), \
699 XSTRING_DATA(newer)); \
700 } else if (source_only) { \
701 Lisp_Object tmp = Ffile_name_nondirectory(file); \
702 message("Loading %s..." done \
703 " (file %s.elc does not exist)", \
704 XSTRING_DATA(file), \
705 XSTRING_DATA(tmp)); \
706 } else if (message_p) { \
707 message("Loading %s..." done, \
708 XSTRING_DATA(file)); \
712 PRINT_LOADING_MESSAGE("");
715 /* Lisp_Object's must be malloc'ed, not stack-allocated */
716 Lisp_Object lstrm = Qnil;
717 const int block_size = 8192;
718 struct gcpro ngcpro1;
722 signal_file_error("Cannot open load file", file);
724 lstrm = make_filedesc_input_stream(fd, 0, -1, LSTR_CLOSING);
725 /* 64K is used for normal files; 8K should be OK here because
726 * Lisp files aren't really all that big. */
727 Lstream_set_buffering(XLSTREAM(lstrm),
728 LSTREAM_BLOCKN_BUFFERED, block_size);
730 lstrm = make_decoding_input_stream(
731 XLSTREAM(lstrm), Fget_coding_system(codesys));
732 Lstream_set_buffering(XLSTREAM(lstrm),
733 LSTREAM_BLOCKN_BUFFERED, block_size);
735 /* NOTE: Order of these is very important.
736 * Don't rearrange them. */
737 record_unwind_protect(load_unwind, lstrm);
738 record_unwind_protect(load_descriptor_unwind,
739 Vload_descriptor_list);
740 record_unwind_protect(load_file_name_internal_unwind,
741 Vload_file_name_internal);
742 record_unwind_protect(
743 load_file_name_internal_the_purecopy_unwind,
744 Vload_file_name_internal_the_purecopy);
745 record_unwind_protect(load_force_doc_string_unwind,
746 Vload_force_doc_string_list);
747 Vload_file_name_internal = found;
748 Vload_file_name_internal_the_purecopy = Qnil;
749 specbind(Qload_file_name, found);
750 Vload_descriptor_list =
751 Fcons(make_int(fd), Vload_descriptor_list);
752 Vload_force_doc_string_list = Qnil;
754 record_unwind_protect(restore_file_domain, Vfile_domain);
755 /* set it to nil; a call to #'domain will set it. */
760 /* Now determine what sort of ELC file we're reading in. */
761 record_unwind_protect(load_byte_code_version_unwind,
762 make_int(load_byte_code_version));
767 num_read = Lstream_read(XLSTREAM(lstrm), elc_header, 8);
768 if (num_read < 8 || strncmp(elc_header, ";ELC", 4)) {
769 /* Huh? Probably not a valid ELC file. */
770 /* no Ebolification needed */
771 load_byte_code_version = 100;
772 Lstream_unread(XLSTREAM(lstrm), elc_header,
775 load_byte_code_version = elc_header[4];
778 /* no Ebolification needed */
779 load_byte_code_version = 100;
782 readevalloop(lstrm, file, Feval, 0);
784 if (!NILP(used_codesys)) {
786 decoding_stream_coding_system(XLSTREAM(lstrm));
787 Fset(used_codesys, XCODING_SYSTEM_NAME(tmp));
790 unbind_to(speccount, Qnil);
797 /* #### Disgusting kludge */
798 /* Run any load-hooks for this file. */
799 /* #### An even more disgusting kludge. There is horrible code */
800 /* that is relying on the fact that dumped lisp files are found */
801 /* via `load-path' search. */
802 Lisp_Object name = file;
804 if (!NILP(Ffile_name_absolute_p(file))) {
805 name = Ffile_name_nondirectory(file);
809 struct gcpro ngcpro1;
812 tem = Fassoc(name, Vafter_load_alist);
816 struct gcpro ngcpro1;
819 /* Use eval so that errors give a semi-meaningful
820 * backtrace. --Stig */
821 tem = Fcons(Qprogn, Fcdr(tem));
827 /*#ifdef DEBUG_SXEMACS*/
828 if (purify_flag && noninteractive) {
829 if (!EQ(last_file_loaded, file)) {
830 message("Loading %s ...done", XSTRING_DATA(file));
833 /*#endif / * DEBUG_SXEMACS */
835 if (!noninteractive) {
836 PRINT_LOADING_MESSAGE("done");
842 /* ------------------------------- */
844 /* ------------------------------- */
846 static int decode_mode_1(Lisp_Object mode)
848 if (EQ(mode, Qexists))
850 else if (EQ(mode, Qexecutable))
852 else if (EQ(mode, Qwritable))
854 else if (EQ(mode, Qreadable))
856 else if (INTP(mode)) {
857 check_int_range(XINT(mode), 0, 7);
860 signal_simple_error("Invalid value", mode);
861 return 0; /* unreached */
864 static int decode_mode(Lisp_Object mode)
868 else if (CONSP(mode)) {
871 EXTERNAL_LIST_LOOP(tail, mode)
872 mask |= decode_mode_1(XCAR(tail));
875 return decode_mode_1(mode);
878 DEFUN("locate-file", Flocate_file, 2, 4, 0, /*
879 Search for FILENAME through PATH-LIST.
880 If SUFFIXES is non-nil, it should be a list of suffixes to append to
881 file name when searching.
883 If MODE is non-nil, it should be a symbol or a list of symbol representing
884 requirements. Allowed symbols are `exists', `executable', `writable', and
885 `readable'. If MODE is nil, it defaults to `readable'.
887 Filenames are checked against `load-suppress-alist' to determine if they
890 `locate-file' keeps hash tables of the directories it searches through,
891 in order to speed things up. It tries valiantly to not get confused in
892 the face of a changing and unpredictable environment, but can occasionally
893 get tripped up. In this case, you will have to call
894 `locate-file-clear-hashing' to get it back on track. See that function
897 (filename, path_list, suffixes, mode))
899 /* This function can GC */
902 CHECK_STRING(filename);
904 if (LISTP(suffixes)) {
906 EXTERNAL_LIST_LOOP(tail, suffixes)
907 CHECK_STRING(XCAR(tail));
909 CHECK_STRING(suffixes);
911 locate_file(path_list, filename, suffixes, &tp, decode_mode(mode));
915 /* Recalculate the hash table for the given string. DIRECTORY should
916 better have been through Fexpand_file_name() by now. */
918 static Lisp_Object locate_file_refresh_hashing(Lisp_Object directory)
921 make_directory_hash_table((char *)XSTRING_DATA(directory));
924 Fputhash(directory, hash, Vlocate_file_hash_table);
928 /* find the hash table for the given directory, recalculating if necessary */
930 static Lisp_Object locate_file_find_directory_hash_table(Lisp_Object directory)
932 Lisp_Object hash = Fgethash(directory, Vlocate_file_hash_table, Qnil);
934 return locate_file_refresh_hashing(directory);
939 /* The SUFFIXES argument in any of the locate_file* functions can be
940 nil, a list, or a string (for backward compatibility), with the
943 a) nil - no suffix, just search for file name intact
944 (semantically different from "empty suffix list", which
945 would be meaningless.)
946 b) list - list of suffixes to append to file name. Each of these
948 c) string - colon-separated suffixes to append to file name (backward
951 All of this got hairy, so I decided to use a mapper. Calling a
952 function for each suffix shouldn't slow things down, since
953 locate_file is rarely called with enough suffixes for funcalls to
954 make any difference. */
956 /* Map FUN over SUFFIXES, as described above. FUN will be called with a
957 char * containing the current file name, and ARG. Mapping stops when
958 FUN returns non-zero. */
960 locate_file_map_suffixes(Lisp_Object filename, Lisp_Object suffixes,
961 int (*fun) (char *, void *), void *arg)
963 /* This function can GC */
967 /* Calculate maximum size of any filename made from
968 this path element/specified file name and any possible suffix. */
969 if (CONSP(suffixes)) {
970 /* We must traverse the list, so why not do it right. */
973 LIST_LOOP(tail, suffixes) {
974 if (XSTRING_LENGTH(XCAR(tail)) > max)
975 max = XSTRING_LENGTH(XCAR(tail));
977 } else if (NILP(suffixes))
980 /* Just take the easy way out */
981 max = XSTRING_LENGTH(suffixes);
983 fn_len = XSTRING_LENGTH(filename);
984 fn = (char *)alloca(max + fn_len + 1);
985 memcpy(fn, (char *)XSTRING_DATA(filename), fn_len);
987 /* Loop over suffixes. */
988 if (!STRINGP(suffixes)) {
989 if (NILP(suffixes)) {
990 /* Case a) discussed in the comment above. */
992 if ((*fun) (fn, arg))
997 LIST_LOOP(tail, suffixes) {
998 memcpy(fn + fn_len, XSTRING_DATA(XCAR(tail)),
999 XSTRING_LENGTH(XCAR(tail)));
1000 fn[fn_len + XSTRING_LENGTH(XCAR(tail))] = 0;
1001 if ((*fun) (fn, arg))
1007 const char *nsuffix = (const char *)XSTRING_DATA(suffixes);
1010 char *esuffix = (char *)strchr(nsuffix, ':');
1012 esuffix ? esuffix - nsuffix : (int)strlen(nsuffix);
1014 /* Concatenate path element/specified name with the suffix. */
1015 strncpy(fn + fn_len, nsuffix, lsuffix);
1016 fn[fn_len + lsuffix] = '\0';
1018 if ((*fun) (fn, arg))
1021 /* Advance to next suffix. */
1024 nsuffix += lsuffix + 1;
1029 struct locate_file_in_directory_mapper_closure {
1031 Lisp_Object *storeptr;
1035 static int locate_file_in_directory_mapper(char *fn, void *arg)
1037 struct locate_file_in_directory_mapper_closure *closure =
1038 (struct locate_file_in_directory_mapper_closure *)arg;
1041 /* Ignore file if it's a directory. */
1042 if (sxemacs_stat(fn, &st) >= 0 && (st.st_mode & S_IFMT) != S_IFDIR) {
1043 /* Check that we can access or open it. */
1044 if (closure->mode >= 0)
1045 closure->fd = access(fn, closure->mode);
1047 closure->fd = open(fn, O_RDONLY | OPEN_BINARY, 0);
1049 if (closure->fd >= 0) {
1050 if (!suppressedp(fn, Qnil)) {
1051 /* We succeeded; return this descriptor and
1053 if (closure->storeptr)
1054 *closure->storeptr = build_string(fn);
1056 /* If we actually opened the file, set
1057 close-on-exec flag on the new descriptor so
1058 that subprocesses can't whack at it. */
1059 if (closure->mode < 0)
1060 (void)fcntl(closure->fd,
1061 F_SETFD, FD_CLOEXEC);
1074 /* look for STR in PATH, optionally adding SUFFIXES. DIRECTORY need
1075 not have been expanded. */
1078 locate_file_in_directory(Lisp_Object directory, Lisp_Object str,
1079 Lisp_Object suffixes, Lisp_Object * storeptr, int mode)
1081 /* This function can GC */
1082 struct locate_file_in_directory_mapper_closure closure;
1083 Lisp_Object filename = Qnil;
1084 struct gcpro gcpro1, gcpro2, gcpro3;
1086 GCPRO3(directory, str, filename);
1088 filename = Fexpand_file_name(str, directory);
1089 if (NILP(filename) || NILP(Ffile_name_absolute_p(filename)))
1090 /* If there are non-absolute elts in PATH (eg ".") */
1091 /* Of course, this could conceivably lose if luser sets
1092 default-directory to be something non-absolute ... */
1095 /* NIL means current directory */
1096 filename = current_buffer->directory;
1098 filename = Fexpand_file_name(filename,
1099 current_buffer->directory);
1100 if (NILP(Ffile_name_absolute_p(filename))) {
1101 /* Give up on this directory! */
1108 closure.storeptr = storeptr;
1109 closure.mode = mode;
1111 locate_file_map_suffixes(filename, suffixes,
1112 locate_file_in_directory_mapper, &closure);
1118 /* do the same as locate_file() but don't use any hash tables. */
1121 locate_file_without_hash(Lisp_Object path, Lisp_Object str,
1122 Lisp_Object suffixes, Lisp_Object * storeptr, int mode)
1124 /* This function can GC */
1125 int absolute = !NILP(Ffile_name_absolute_p(str));
1127 EXTERNAL_LIST_LOOP(path, path) {
1129 locate_file_in_directory(XCAR(path), str, suffixes,
1140 static int locate_file_construct_suffixed_files_mapper(char *fn, void *arg)
1142 Lisp_Object *tail = (Lisp_Object *) arg;
1143 *tail = Fcons(build_string(fn), *tail);
1147 /* Construct a list of all files to search for.
1148 It makes sense to have this despite locate_file_map_suffixes()
1149 because we need Lisp strings to access the hash-table, and it would
1150 be inefficient to create them on the fly, again and again for each
1151 path component. See locate_file(). */
1154 locate_file_construct_suffixed_files(Lisp_Object filename, Lisp_Object suffixes)
1156 Lisp_Object tail = Qnil;
1157 struct gcpro gcpro1;
1160 locate_file_map_suffixes(filename, suffixes,
1161 locate_file_construct_suffixed_files_mapper,
1165 return Fnreverse(tail);
1168 DEFUN("locate-file-clear-hashing", Flocate_file_clear_hashing, 1, 1, 0, /*
1169 Clear the hash records for the specified list of directories.
1170 `locate-file' uses a hashing scheme to speed lookup, and will correctly
1171 track the following environmental changes:
1173 -- changes of any sort to the list of directories to be searched.
1174 -- addition and deletion of non-shadowing files (see below) from the
1175 directories in the list.
1176 -- byte-compilation of a .el file into a .elc file.
1178 `locate-file' will primarily get confused if you add a file that shadows
1179 \(i.e. has the same name as) another file further down in the directory list.
1180 In this case, you must call `locate-file-clear-hashing'.
1182 If PATH is t, it means to fully clear all the accumulated hashes. This
1183 can be used if the internal tables grow too large, or when dumping.
1188 Fclrhash(Vlocate_file_hash_table);
1190 Lisp_Object pathtail;
1191 EXTERNAL_LIST_LOOP(pathtail, path) {
1192 Lisp_Object pathel =
1193 Fexpand_file_name(XCAR(pathtail), Qnil);
1194 Fremhash(pathel, Vlocate_file_hash_table);
1200 /* Search for a file whose name is STR, looking in directories
1201 in the Lisp list PATH, and trying suffixes from SUFFIXES.
1202 SUFFIXES is a list of possible suffixes, or (for backward
1203 compatibility) a string containing possible suffixes separated by
1205 On success, returns a file descriptor. On failure, returns -1.
1207 MODE nonnegative means don't open the files,
1208 just look for one for which access(file,MODE) succeeds. In this case,
1209 returns a nonnegative value on success. On failure, returns -1.
1211 If STOREPTR is nonzero, it points to a slot where the name of
1212 the file actually found should be stored as a Lisp string.
1213 Nil is stored there on failure.
1215 Called openp() in FSFmacs. */
1218 locate_file(Lisp_Object path, Lisp_Object str, Lisp_Object suffixes,
1219 Lisp_Object * storeptr, int mode)
1221 /* This function can GC */
1222 Lisp_Object suffixtab = Qnil;
1223 Lisp_Object pathtail, pathel_expanded;
1225 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
1230 /* Is it really necessary to gcpro path and str? It shouldn't be
1231 unless some caller has fucked up. There are known instances that
1232 call us with build_string("foo:bar") as SUFFIXES, though. */
1233 GCPRO4(path, str, suffixes, suffixtab);
1235 /* if this filename has directory components, it's too complicated
1236 to try and use the hash tables. */
1237 if (!NILP(Ffile_name_directory(str))) {
1239 locate_file_without_hash(path, str, suffixes, storeptr,
1245 suffixtab = locate_file_construct_suffixed_files(str, suffixes);
1247 EXTERNAL_LIST_LOOP(pathtail, path) {
1248 Lisp_Object pathel = XCAR(pathtail);
1249 Lisp_Object hash_table;
1253 /* If this path element is relative, we have to look by hand. */
1254 if (NILP(pathel) || NILP(Ffile_name_absolute_p(pathel))) {
1256 locate_file_in_directory(pathel, str, suffixes,
1265 pathel_expanded = Fexpand_file_name(pathel, Qnil);
1267 locate_file_find_directory_hash_table(pathel_expanded);
1269 if (!NILP(hash_table)) {
1270 /* Loop over suffixes. */
1271 LIST_LOOP(tail, suffixtab)
1272 if (!NILP(Fgethash(XCAR(tail), hash_table, Qnil))) {
1279 /* This is a likely candidate. Look by hand in this directory
1280 so we don't get thrown off if someone byte-compiles a file. */
1282 locate_file_in_directory(pathel, str, suffixes,
1289 /* Hmm ... the file isn't actually there. (Or possibly it's
1290 a directory ...) So refresh our hashing. */
1291 locate_file_refresh_hashing(pathel_expanded);
1295 /* File is probably not there, but check the hard way just in case. */
1296 val = locate_file_without_hash(path, str, suffixes, storeptr, mode);
1298 /* Sneaky user added a file without telling us. */
1299 Flocate_file_clear_hashing(path);
1308 /* Merge the list we've accumulated of globals from the current input source
1309 into the load_history variable. The details depend on whether
1310 the source has an associated file name or not. */
1312 static void build_load_history(int loading, Lisp_Object source)
1314 REGISTER Lisp_Object tail, prev, newelt;
1315 REGISTER Lisp_Object tem, tem2;
1318 #if !defined(LOADHIST_DUMPED)
1319 /* Don't bother recording anything for preloaded files. */
1324 tail = Vload_history;
1327 while (!NILP(tail)) {
1330 /* Find the feature's previous assoc list... */
1331 if (internal_equal(source, Fcar(tem), 0)) {
1334 /* If we're loading, remove it. */
1337 Vload_history = Fcdr(tail);
1339 Fsetcdr(prev, Fcdr(tail));
1342 /* Otherwise, cons on new symbols that are not already members. */
1344 tem2 = Vcurrent_load_list;
1346 while (CONSP(tem2)) {
1347 newelt = XCAR(tem2);
1349 if (NILP(Fmemq(newelt, tem)))
1350 Fsetcar(tail, Fcons(Fcar(tem),
1366 /* If we're loading, cons the new assoc onto the front of load-history,
1367 the most-recently-loaded position. Also do this if we didn't find
1368 an existing member for the current source. */
1369 if (loading || !foundit)
1370 Vload_history = Fcons(Fnreverse(Vcurrent_load_list),
1374 #else /* !LOADHIST */
1375 #define build_load_history(x,y)
1376 #endif /* !LOADHIST */
1378 #if 0 /* FSFmacs defun hack */
1379 Lisp_Object unreadpure(void)
1380 { /* Used as unwind-protect function in readevalloop */
1387 readevalloop(Lisp_Object readcharfun,
1388 Lisp_Object sourcename,
1389 Lisp_Object(*evalfun) (Lisp_Object), int printflag)
1391 /* This function can GC */
1393 REGISTER Lisp_Object val = Qnil;
1394 int speccount = specpdl_depth();
1395 struct gcpro gcpro1, gcpro2;
1396 struct buffer *b = 0;
1398 if (BUFFERP(readcharfun))
1399 b = XBUFFER(readcharfun);
1400 else if (MARKERP(readcharfun))
1401 b = XMARKER(readcharfun)->buffer;
1403 /* Don't do this. It is not necessary, and it needlessly exposes
1404 READCHARFUN (which can be a stream) to Lisp. --hniksic */
1405 /*specbind (Qstandard_input, readcharfun); */
1407 specbind(Qcurrent_load_list, Qnil);
1409 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
1410 Vcurrent_compiled_function_annotation = Qnil;
1412 GCPRO2(val, sourcename);
1414 LOADHIST_ATTACH(sourcename);
1419 if (b != 0 && !BUFFER_LIVE_P(b))
1420 error("Reading from killed buffer");
1422 c = readchar(readcharfun);
1425 while ((c = readchar(readcharfun)) != '\n' && c != -1)
1432 /* Ignore whitespace here, so we can detect eof. */
1433 if (c == ' ' || c == '\t' || c == '\n' || c == '\f'
1437 #if 0 /* FSFmacs defun hack */
1438 if (purify_flag && c == '(') {
1439 int count1 = specpdl_depth();
1440 record_unwind_protect(unreadpure, Qnil);
1441 val = read_list(readcharfun, ')', -1, 1);
1442 unbind_to(count1, Qnil);
1444 #else /* No "defun hack" -- Emacs 19 uses read-time syntax for bytecodes */
1446 unreadchar(readcharfun, c);
1447 Vread_objects = Qnil;
1448 if (NILP(Vload_read_function))
1449 val = read0(readcharfun);
1451 val = call1(Vload_read_function, readcharfun);
1454 val = (*evalfun) (val);
1456 Vvalues = Fcons(val, Vvalues);
1457 if (EQ(Vstandard_output, Qt))
1464 build_load_history(LSTREAMP(readcharfun) ||
1465 /* This looks weird, but it's what's in FSFmacs */
1466 (b ? BUF_NARROWED(b) : BUF_NARROWED(current_buffer)),
1470 unbind_to(speccount, Qnil);
1473 DEFUN("eval-buffer", Feval_buffer, 0, 2, "bBuffer: ", /*
1474 Execute BUFFER as Lisp code.
1475 Programs can pass two arguments, BUFFER and PRINTFLAG.
1476 BUFFER is the buffer to evaluate (nil means use current buffer).
1477 PRINTFLAG controls printing of output:
1478 nil means discard it; anything else is a stream for printing.
1480 If there is no error, point does not move. If there is an error,
1481 point remains at the end of the last character read from the buffer.
1483 (buffer, printflag))
1485 /* This function can GC */
1486 int speccount = specpdl_depth();
1487 Lisp_Object tem, buf;
1490 buf = Fcurrent_buffer();
1492 buf = Fget_buffer(buffer);
1494 error("No such buffer.");
1496 if (NILP(printflag))
1497 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */
1500 specbind(Qstandard_output, tem);
1501 record_unwind_protect(save_excursion_restore, save_excursion_save());
1502 BUF_SET_PT(XBUFFER(buf), BUF_BEGV(XBUFFER(buf)));
1503 readevalloop(buf, XBUFFER(buf)->filename, Feval, !NILP(printflag));
1505 return unbind_to(speccount, Qnil);
1509 xxDEFUN("eval-current-buffer", Feval_current_buffer, 0, 1, "", /*
1510 Execute the current buffer as Lisp code.
1511 Programs can pass argument PRINTFLAG which controls printing of output:
1512 nil means discard it; anything else is stream for print.
1514 If there is no error, point does not move. If there is an error,
1515 point remains at the end of the last character read from the buffer.
1522 DEFUN("eval-region", Feval_region, 2, 3, "r", /*
1523 Execute the region as Lisp code.
1524 When called from programs, expects two arguments START and END
1525 giving starting and ending indices in the current buffer
1526 of the text to be executed.
1527 Programs can pass third optional argument STREAM which controls output:
1528 nil means discard it; anything else is stream for printing it.
1530 If there is no error, point does not move. If there is an error,
1531 point remains at the end of the last character read from the buffer.
1533 Note: Before evaling the region, this function narrows the buffer to it.
1534 If the code being eval'd should happen to trigger a redisplay you may
1535 see some text temporarily disappear because of this.
1537 (start, end, stream))
1539 /* This function can GC */
1540 int speccount = specpdl_depth();
1542 Lisp_Object cbuf = Fcurrent_buffer();
1545 tem = Qsymbolp; /* #### #@[]*&$#*[& SI:NULL-STREAM */
1548 specbind(Qstandard_output, tem);
1551 record_unwind_protect(save_excursion_restore,
1552 save_excursion_save());
1553 record_unwind_protect(save_restriction_restore,
1554 save_restriction_save());
1556 /* This both uses start and checks its type. */
1557 Fgoto_char(start, cbuf);
1558 Fnarrow_to_region(make_int(BUF_BEGV(current_buffer)), end, cbuf);
1559 readevalloop(cbuf, XBUFFER(cbuf)->filename, Feval, !NILP(stream));
1561 return unbind_to(speccount, Qnil);
1564 DEFUN("read", Fread, 0, 1, 0, /*
1565 Read one Lisp expression as text from STREAM, return as Lisp object.
1566 If STREAM is nil, use the value of `standard-input' (which see).
1567 STREAM or the value of `standard-input' may be:
1568 a buffer (read from point and advance it)
1569 a marker (read from where it points and advance it)
1570 a function (call it with no arguments for each character,
1571 call it with a char as argument to push a char back)
1572 a string (takes text from string, starting at the beginning)
1573 t (read text line using minibuffer and use it).
1578 stream = Vstandard_input;
1580 stream = Qread_char;
1582 Vread_objects = Qnil;
1584 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
1585 Vcurrent_compiled_function_annotation = Qnil;
1587 if (EQ(stream, Qread_char)) {
1588 Lisp_Object val = call1(Qread_from_minibuffer,
1589 build_translated_string
1590 ("Lisp expression: "));
1591 return Fcar(Fread_from_string(val, Qnil, Qnil));
1594 if (STRINGP(stream))
1595 return Fcar(Fread_from_string(stream, Qnil, Qnil));
1597 return read0(stream);
1600 DEFUN("read-from-string", Fread_from_string, 1, 3, 0, /*
1601 Read one Lisp expression which is represented as text by STRING.
1602 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1603 START and END optionally delimit a substring of STRING from which to read;
1604 they default to 0 and (length STRING) respectively.
1606 (string, start, end))
1608 Bytecount startval, endval;
1610 Lisp_Object lispstream = Qnil;
1611 struct gcpro gcpro1;
1613 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
1614 Vcurrent_compiled_function_annotation = Qnil;
1617 CHECK_STRING(string);
1618 get_string_range_byte(string, start, end, &startval, &endval,
1619 GB_HISTORICAL_STRING_BEHAVIOR);
1620 lispstream = make_lisp_string_input_stream(string, startval,
1623 Vread_objects = Qnil;
1625 tem = read0(lispstream);
1626 /* Yeah, it's ugly. Gonna make something of it?
1627 At least our reader is reentrant ... */
1629 (Fcons(tem, make_int
1630 (bytecount_to_charcount
1631 (XSTRING_DATA(string),
1632 startval + Lstream_byte_count(XLSTREAM(lispstream))))));
1633 Lstream_delete(XLSTREAM(lispstream));
1639 ureader_find(Lisp_Object name)
1641 return Fcdr(Fassoc(name, Vureaders));
1646 * ureader_read() assumes that input starts with < character and
1647 * should finish on matching > character.
1650 ureader_read(Lisp_Object ureader_fun, Lisp_Object readcharfun)
1653 unsigned int oparens = 0;
1654 struct gcpro gcpro1;
1657 Lstream_rewind(XLSTREAM(Vread_buffer_stream));
1658 while ((c = readchar(readcharfun)) >= 0) {
1661 else if (c == '>') {
1663 /* We got final closing paren */
1668 Lstream_put_emchar(XLSTREAM (Vread_buffer_stream), c);
1672 return Fsignal(Qend_of_file,
1673 list1(READCHARFUN_MAYBE(readcharfun)));
1675 Lstream_flush(XLSTREAM(Vread_buffer_stream));
1677 instr = make_string(resizing_buffer_stream_ptr
1678 (XLSTREAM(Vread_buffer_stream)),
1679 Lstream_byte_count(XLSTREAM(Vread_buffer_stream)));
1681 RETURN_UNGCPRO(call1(ureader_fun, instr));
1685 #ifdef LISP_BACKQUOTES
1687 static Lisp_Object backquote_unwind(Lisp_Object ptr)
1688 { /* used as unwind-protect function in read0() */
1689 int *counter = (int *)get_opaque_ptr(ptr);
1692 free_opaque_ptr(ptr);
1698 /* Use this for recursive reads, in contexts where internal tokens
1699 are not allowed. See also read1(). */
1700 static Lisp_Object read0(Lisp_Object readcharfun)
1702 Lisp_Object val = read1(readcharfun);
1704 if (CONSP(val) && UNBOUNDP(XCAR(val))) {
1705 Emchar c = XCHAR(XCDR(val));
1706 free_cons(XCONS(val));
1707 return Fsignal(Qinvalid_read_syntax,
1708 list1(Fchar_to_string(make_char(c))));
1714 static Emchar read_escape(Lisp_Object readcharfun)
1716 /* This function can GC */
1717 Emchar c = readchar(readcharfun);
1720 signal_error(Qend_of_file,
1721 list1(READCHARFUN_MAYBE(readcharfun)));
1746 c = readchar(readcharfun);
1748 signal_error(Qend_of_file,
1749 list1(READCHARFUN_MAYBE(readcharfun)));
1751 error("Invalid escape character syntax");
1752 c = readchar(readcharfun);
1754 signal_error(Qend_of_file,
1755 list1(READCHARFUN_MAYBE(readcharfun)));
1757 c = read_escape(readcharfun);
1760 /* Originally, FSF_KEYS provided a degree of FSF Emacs
1761 compatibility by defining character "modifiers" alt, super,
1762 hyper and shift to infest the characters (i.e. integers).
1764 However, this doesn't cut it for XEmacs 20, which
1765 distinguishes characters from integers. Without Mule, ?\H-a
1766 simply returns ?a because every character is clipped into
1767 0-255. Under Mule it is much worse -- ?\H-a with FSF_KEYS
1768 produces an illegal character, and moves us to crash-land.
1770 For these reasons, FSF_KEYS hack is useless and without hope
1771 of ever working under XEmacs 20. */
1775 #define alt_modifier (0x040000)
1776 #define super_modifier (0x080000)
1777 #define hyper_modifier (0x100000)
1778 #define shift_modifier (0x200000)
1779 /* fsf uses a different modifiers for meta and control. Possibly
1780 byte_compiled code will still work fsfmacs, though... --Stig
1782 #define ctl_modifier (0x400000)
1783 #define meta_modifier (0x800000)
1785 #define FSF_LOSSAGE(mask) \
1786 if (fail_on_bucky_bit_character_escapes || \
1787 ((c = readchar (readcharfun)) != '-')) \
1788 error ("Invalid escape character syntax"); \
1789 c = readchar (readcharfun); \
1791 signal_error (Qend_of_file, list1 (READCHARFUN_MAYBE (readcharfun))); \
1793 c = read_escape (readcharfun); \
1797 FSF_LOSSAGE(shift_modifier);
1799 FSF_LOSSAGE(hyper_modifier);
1801 FSF_LOSSAGE(alt_modifier);
1803 FSF_LOSSAGE(super_modifier);
1805 #undef super_modifier
1806 #undef hyper_modifier
1807 #undef shift_modifier
1810 #endif /* FSF_KEYS */
1813 c = readchar(readcharfun);
1815 signal_error(Qend_of_file,
1816 list1(READCHARFUN_MAYBE(readcharfun)));
1818 error("Invalid escape character syntax");
1820 c = readchar(readcharfun);
1822 signal_error(Qend_of_file,
1823 list1(READCHARFUN_MAYBE(readcharfun)));
1825 c = read_escape(readcharfun);
1826 /* FSFmacs junk for non-ASCII controls.
1831 return c & (0200 | 037);
1841 /* An octal escape, as in ANSI C. */
1843 REGISTER Emchar i = c - '0';
1844 REGISTER int count = 0;
1845 while (++count < 3) {
1846 if ((c = readchar(readcharfun)) >= '0'
1848 i = (i << 3) + (c - '0');
1850 unreadchar(readcharfun, c);
1858 /* A hex escape, as in ANSI C, except that we only allow latin-1
1859 characters to be read this way. What is "\x4e03" supposed to
1860 mean, anyways, if the internal representation is hidden?
1861 This is also consistent with the treatment of octal escapes. */
1863 REGISTER Emchar i = 0;
1864 REGISTER int count = 0;
1865 while (++count <= 2) {
1866 c = readchar(readcharfun);
1867 /* Remember, can't use isdigit(), isalpha() etc. on Emchars */
1868 if (c >= '0' && c <= '9')
1869 i = (i << 4) + (c - '0');
1870 else if (c >= 'a' && c <= 'f')
1871 i = (i << 4) + (c - 'a') + 10;
1872 else if (c >= 'A' && c <= 'F')
1873 i = (i << 4) + (c - 'A') + 10;
1875 unreadchar(readcharfun, c);
1883 /* #### need some way of reading an extended character with
1884 an escape sequence. */
1892 /* read symbol-constituent stuff into `Vread_buffer_stream'. */
1894 read_atom_0(Lisp_Object readcharfun, Emchar firstchar, int *saw_a_backslash)
1896 /* This function can GC */
1897 Emchar c = ((firstchar) >= 0 ? firstchar : readchar(readcharfun));
1898 Lstream_rewind(XLSTREAM(Vread_buffer_stream));
1900 *saw_a_backslash = 0;
1902 while (c > 040 /* #### - comma should be here as should backquote */
1903 && !(c == '\"' || c == '\'' || c == ';' || c == '(' || c == ')'
1904 #ifndef HAVE_FPFLOAT
1905 /* If we have floating-point support, then we need
1906 to allow <digits><dot><digits>. */
1908 #endif /* not HAVE_FPFLOAT */
1909 || c == '[' || c == ']' || c == '#')) {
1911 c = readchar(readcharfun);
1913 signal_error(Qend_of_file,
1914 list1(READCHARFUN_MAYBE
1916 *saw_a_backslash = 1;
1918 Lstream_put_emchar(XLSTREAM(Vread_buffer_stream), c);
1920 c = readchar(readcharfun);
1924 unreadchar(readcharfun, c);
1925 /* blasted terminating 0 */
1926 Lstream_put_emchar(XLSTREAM(Vread_buffer_stream), 0);
1927 Lstream_flush(XLSTREAM(Vread_buffer_stream));
1929 return Lstream_byte_count(XLSTREAM(Vread_buffer_stream)) - 1;
1932 static Lisp_Object parse_integer(const Bufbyte * buf, Bytecount len, int base);
1935 read_atom(Lisp_Object readcharfun, Emchar firstchar, int uninterned_symbol)
1937 /* This function can GC */
1938 int saw_a_backslash;
1939 Bytecount len = read_atom_0(readcharfun, firstchar, &saw_a_backslash);
1940 char *read_ptr = (char *)
1941 resizing_buffer_stream_ptr(XLSTREAM(Vread_buffer_stream));
1943 /* Is it an integer? */
1944 if (!(saw_a_backslash || uninterned_symbol)) {
1945 /* If a token had any backslashes in it, it is disqualified from
1946 being an integer or a float. This means that 123\456 is a
1947 symbol, as is \123 (which is the way (intern "123") prints).
1948 Also, if token was preceded by #:, it's always a symbol.
1950 char *p = read_ptr + len;
1951 char *p1 = read_ptr;
1953 if (*p1 == '+' || *p1 == '-')
1958 while (p1 != p && (c = *p1) >= '0' && c <= '9')
1961 /* Integers can have trailing decimal points. */
1962 if (p1 > read_ptr && p1 < p && *p1 == '.')
1966 /* It is an integer. */
1971 return parse_integer((Bufbyte*)read_ptr, len,
1975 #if defined HAVE_MPQ && defined WITH_GMP
1976 if (isbigq_string(read_ptr))
1977 return read_bigq_string(read_ptr);
1979 #if defined HAVE_MPFR && defined WITH_MPFR
1980 if (isfloat_string(read_ptr) && (Vread_real_as == Qbigfr))
1981 return read_bigfr_string(read_ptr);
1982 #endif /* HAVE_MPFR */
1983 #if defined HAVE_MPF && defined WITH_GMP
1984 if (isfloat_string(read_ptr) && (Vread_real_as == Qbigf))
1985 return read_bigf_string(read_ptr);
1987 #endif /* HAVE_MPF */
1989 if (isfloat_string(read_ptr)) {
1990 return make_float(str_to_fpfloat(read_ptr));
1993 #if defined HAVE_PSEUG && defined WITH_PSEUG
1994 if (isgaussian_string(read_ptr))
1995 return read_bigg_string(read_ptr);
1997 #if defined HAVE_MPC && defined WITH_MPC || \
1998 defined HAVE_PSEUC && defined WITH_PSEUC
1999 if (isbigc_string(read_ptr))
2000 return read_bigc_string(read_ptr);
2001 #endif /* HAVE_MPC */
2002 #if defined HAVE_QUATERN && defined WITH_QUATERN
2003 if (isquatern_string(read_ptr))
2004 return read_quatern_string(read_ptr);
2008 /* check for resclass syntax */
2009 if (ase_resc_rng_pred_f && ase_resc_rng_f &&
2010 ase_resc_rng_pred_f(read_ptr))
2011 return ase_resc_rng_f(read_ptr);
2012 if (ase_resc_elm_pred_f && ase_resc_elm_f &&
2013 ase_resc_elm_pred_f(read_ptr))
2014 return ase_resc_elm_f(read_ptr);
2018 if (uninterned_symbol)
2020 Fmake_symbol(make_string
2021 ((Bufbyte *) read_ptr, len));
2024 make_string((Bufbyte *) read_ptr, len);
2025 sym = Fintern(name, Qnil);
2032 parse_integer(const Bufbyte * buf, Bytecount len, int base)
2034 const Bufbyte *lim = buf + len;
2035 const Bufbyte *p = buf;
2037 int negativland = 0;
2042 } else if (*p == '+') {
2049 for (; (p < lim) && (*p != '\0'); p++) {
2055 else if (isupper(c))
2057 else if (islower(c))
2062 if (c < 0 || c >= base)
2066 num = num * base + c;
2072 EMACS_INT int_result =
2073 negativland ? -(EMACS_INT) num : (EMACS_INT) num;
2074 Lisp_Object result = make_int(int_result);
2075 if (num && ((XINT(result) < 0) != negativland))
2077 if (XINT(result) != int_result)
2082 #if defined HAVE_MPZ && (defined WITH_GMP || defined WITH_BSDMP)
2083 return read_bigz_string((const char*)buf, base);
2085 /* This is going to kill us!
2086 * Big integers cannot be used anywhere if the reader rewards
2087 * their occurence that harshly
2089 return Fsignal(Qinvalid_read_syntax,
2090 list3(build_translated_string
2091 ("Integer constant overflow in reader"),
2092 make_string(buf, len), make_int(base)));
2094 warn_when_safe(Qinvalid_read_syntax, Qwarning,
2095 "Integer constant overflow in reader: %s,"
2096 " proceeding nervously with 0.",
2099 #endif /* HAVE_MPZ && WITH_GMP||WITH_BSDMP */
2101 return Fsignal(Qinvalid_read_syntax,
2102 list3(build_translated_string
2103 ("Invalid integer constant in reader"),
2104 make_string(buf, len), make_int(base)));
2108 read_integer(Lisp_Object readcharfun, int base)
2110 /* This function can GC */
2111 int saw_a_backslash;
2112 Bytecount len = read_atom_0(readcharfun, -1, &saw_a_backslash);
2113 return (parse_integer
2114 (resizing_buffer_stream_ptr(XLSTREAM(Vread_buffer_stream)),
2116 ? 0 /* make parse_integer signal error */
2121 read_bit_vector(Lisp_Object readcharfun)
2123 unsigned_char_dynarr *dyn = Dynarr_new(unsigned_char);
2128 Emchar c = readchar(readcharfun);
2135 unreadchar(readcharfun, c);
2138 Dynarr_add(dyn, bit);
2141 val = make_bit_vector_from_byte_vector(Dynarr_atp(dyn, 0),
2142 Dynarr_length(dyn));
2150 struct structure_type*
2151 define_structure_type(Lisp_Object type,
2152 int(*validate)(Lisp_Object data, Error_behavior errb),
2153 Lisp_Object(*instantiate)(Lisp_Object data))
2155 struct structure_type st;
2158 st.keywords = Dynarr_new(structure_keyword_entry);
2159 st.validate = validate;
2160 st.instantiate = instantiate;
2161 Dynarr_add(the_structure_type_dynarr, st);
2163 return Dynarr_atp(the_structure_type_dynarr,
2164 Dynarr_length(the_structure_type_dynarr) - 1);
2168 define_structure_type_keyword(struct structure_type *st, Lisp_Object keyword,
2169 int (*validate) (Lisp_Object keyword,
2171 Error_behavior errb))
2173 struct structure_keyword_entry en;
2175 en.keyword = keyword;
2176 en.validate = validate;
2177 Dynarr_add(st->keywords, en);
2180 static struct structure_type*
2181 recognized_structure_type(Lisp_Object type)
2185 for (i = 0; i < Dynarr_length(the_structure_type_dynarr); i++) {
2186 struct structure_type *st =
2187 Dynarr_atp(the_structure_type_dynarr, i);
2188 if (EQ(st->type, type))
2196 read_structure(Lisp_Object readcharfun)
2198 Emchar c = readchar(readcharfun);
2199 Lisp_Object list = Qnil;
2200 Lisp_Object orig_list = Qnil;
2201 Lisp_Object already_seen = Qnil;
2203 struct structure_type *st;
2204 struct gcpro gcpro1, gcpro2;
2206 GCPRO2(orig_list, already_seen);
2208 RETURN_UNGCPRO(continuable_read_syntax_error
2209 ("#s not followed by paren"));
2210 list = read_list(readcharfun, ')', 0, 0);
2213 int len = XINT(Flength(list));
2215 RETURN_UNGCPRO(continuable_read_syntax_error
2216 ("structure type not specified"));
2219 (continuable_read_syntax_error
2220 ("structures must have alternating keyword/value pairs"));
2223 st = recognized_structure_type(XCAR(list));
2225 RETURN_UNGCPRO(Fsignal(Qinvalid_read_syntax,
2226 list2(build_translated_string
2227 ("unrecognized structure type"),
2231 keyword_count = Dynarr_length(st->keywords);
2232 while (!NILP(list)) {
2233 Lisp_Object keyword, value;
2235 struct structure_keyword_entry *en = NULL;
2237 keyword = Fcar(list);
2242 if (!NILP(memq_no_quit(keyword, already_seen)))
2243 RETURN_UNGCPRO(Fsignal(Qinvalid_read_syntax,
2244 list2(build_translated_string
2245 ("structure keyword already seen"),
2248 for (i = 0; i < keyword_count; i++) {
2249 en = Dynarr_atp(st->keywords, i);
2250 if (EQ(keyword, en->keyword))
2254 if (i == keyword_count)
2255 RETURN_UNGCPRO(Fsignal(Qinvalid_read_syntax,
2256 list2(build_translated_string
2257 ("unrecognized structure keyword"),
2260 if (en->validate && !(en->validate) (keyword, value, ERROR_ME))
2262 (Fsignal(Qinvalid_read_syntax,
2263 list3(build_translated_string
2264 ("invalid value for structure keyword"),
2267 already_seen = Fcons(keyword, already_seen);
2270 if (st->validate && !(st->validate) (orig_list, ERROR_ME))
2271 RETURN_UNGCPRO(Fsignal(Qinvalid_read_syntax,
2272 list2(build_translated_string
2273 ("invalid structure initializer"),
2276 RETURN_UNGCPRO((st->instantiate) (XCDR(orig_list)));
2279 static Lisp_Object read_compiled_function(Lisp_Object readcharfun, int);
2280 static Lisp_Object read_vector(Lisp_Object readcharfun, int terminator);
2282 /* Get the next character; filter out whitespace and comments */
2285 reader_nextchar(Lisp_Object readcharfun)
2287 /* This function can GC */
2292 c = readchar(readcharfun);
2294 signal_error(Qend_of_file,
2295 list1(READCHARFUN_MAYBE(readcharfun)));
2300 /* Ignore whitespace and control characters */
2309 while ((c = readchar(readcharfun)) >= 0 && c != '\n')
2317 static Lisp_Object list2_pure(int pure, Lisp_Object a, Lisp_Object b)
2319 return pure ? pure_cons(a, pure_cons(b, Qnil)) : list2(a, b);
2323 /* Read the next Lisp object from the stream READCHARFUN and return it.
2324 If the return value is a cons whose car is Qunbound, then read1()
2325 encountered a misplaced token (e.g. a right bracket, right paren,
2326 or dot followed by a non-number). To filter this stuff out,
2330 read_string(Lisp_Object readcharfun, Emchar delim, int raw)
2333 /* #### If the input stream is translating, then the string
2334 should be marked as translatable by setting its
2335 `string-translatable' property to t. .el and .elc files
2336 normally are translating input streams. See Fgettext()
2337 and print_internal(). */
2342 Lstream_rewind(XLSTREAM(Vread_buffer_stream));
2343 while ((c = readchar(readcharfun)) >= 0 && c != delim) {
2346 /* For raw strings, insert the
2347 backslash and the next char, */
2349 XLSTREAM(Vread_buffer_stream), c);
2350 c = readchar(readcharfun);
2352 /* otherwise, backslash escapes the next char */
2353 c = read_escape(readcharfun);
2356 /* c is -1 if \ newline has just been seen */
2358 if (!Lstream_byte_count(XLSTREAM(Vread_buffer_stream))) {
2362 Lstream_put_emchar(XLSTREAM
2363 (Vread_buffer_stream),
2369 return Fsignal(Qend_of_file,
2370 list1(READCHARFUN_MAYBE(readcharfun)));
2373 /* If purifying, and string starts with \ newline,
2374 return zero instead. This is for doc strings
2375 that we are really going to find in lib-src/DOC.nn.nn */
2376 if (purify_flag && NILP(Vinternal_doc_file_name) && cancel) {
2380 Lstream_flush(XLSTREAM(Vread_buffer_stream));
2381 return make_string(resizing_buffer_stream_ptr
2382 (XLSTREAM(Vread_buffer_stream)),
2383 Lstream_byte_count(XLSTREAM(Vread_buffer_stream)));
2387 read_raw_string(Lisp_Object readcharfun)
2390 c = reader_nextchar(readcharfun);
2392 /* #r:engine"my sexy raw string" -- raw string w/ flags*/
2394 /* #r"my raw string" -- raw string */
2396 return read_string(readcharfun, '\"', 1);
2397 /* invalid syntax */
2399 unreadchar(readcharfun, c);
2400 return Fsignal(Qinvalid_read_syntax,
2402 ("unrecognized raw string syntax")));
2408 read1(Lisp_Object readcharfun)
2413 c = reader_nextchar(readcharfun);
2417 #ifdef LISP_BACKQUOTES /* old backquote compatibility in lisp reader */
2418 /* if this is disabled, then other code in eval.c must be
2420 Emchar ch = reader_nextchar(readcharfun);
2424 int speccount = specpdl_depth();
2425 ++old_backquote_flag;
2426 record_unwind_protect(backquote_unwind,
2428 (&old_backquote_flag));
2429 tem = read0(readcharfun);
2430 unbind_to(speccount, Qnil);
2431 ch = reader_nextchar(readcharfun);
2433 unreadchar(readcharfun, ch);
2436 (Qinvalid_read_syntax,
2438 ("Weird old-backquote syntax")));
2440 return list2(Qbacktick, tem);
2443 if (old_backquote_flag) {
2444 Lisp_Object tem, comma_type;
2445 ch = readchar(readcharfun);
2447 comma_type = Qcomma_at;
2453 comma_type = Qcomma;
2455 tem = read0(readcharfun);
2456 ch = reader_nextchar
2459 unreadchar(readcharfun,
2462 Qinvalid_read_syntax,
2464 ("Weird old-backquote "
2467 return list2(comma_type, tem);
2469 unreadchar(readcharfun, ch);
2473 (Qinvalid_read_syntax,
2475 ("Comma outside of backquote")));
2477 /* #### - yuck....but this is reverse
2479 /* mostly this is required by edebug, which does
2480 its own annotated reading. We need to have
2481 an annotated_read function that records (with
2482 markers) the buffer positions of the elements
2483 that make up lists, then that can be used in
2484 edebug and bytecomp and the check above can
2485 go back in. --Stig */
2491 unreadchar(readcharfun, ch);
2493 #endif /* old backquote crap... */
2494 return read_list(readcharfun, ')', 1, 1);
2497 return read_vector(readcharfun, ']');
2501 /* #### - huh? these don't do what they seem... */
2502 return noseeum_cons(Qunbound, make_char(c));
2505 /* If a period is followed by a number, then we should read it
2506 as a floating point number. Otherwise, it denotes a dotted
2509 c = readchar(readcharfun);
2510 unreadchar(readcharfun, c);
2512 /* Can't use isdigit on Emchars */
2513 if (c < '0' || c > '9')
2514 return noseeum_cons(Qunbound, make_char('.'));
2516 /* Note that read_atom will loop
2517 at least once, assuring that we will not try to UNREAD
2518 two characters in a row.
2519 (I think this doesn't matter anymore because there should
2520 be no more danger in unreading multiple characters) */
2521 return read_atom(readcharfun, '.', 0);
2523 #else /* ! HAVE_FPFLOAT */
2524 return noseeum_cons(Qunbound, make_char('.'));
2525 #endif /* ! HAVE_FPFLOAT */
2529 c = readchar(readcharfun);
2531 #if 0 /* FSFmacs silly char-table syntax */
2534 #if 0 /* FSFmacs silly bool-vector syntax */
2537 /* "#["-- byte-code constant syntax */
2538 /* purecons #[...] syntax */
2540 return read_compiled_function(readcharfun, ']'
2543 /* "#:"-- gensym syntax */
2545 return read_atom(readcharfun, -1, 1);
2546 /* #'x => (function x) */
2548 return list2(Qfunction, read0(readcharfun));
2550 /* RMS uses this syntax for fat-strings.
2551 If we use it for vectors, then obscure bugs happen.
2553 /* "#(" -- Scheme/CL vector syntax */
2555 return read_vector(readcharfun, ')');
2558 /* When are we going to drop this crap??? -hroptatyr */
2561 struct gcpro gcpro1;
2563 /* Read the string itself. */
2564 tmp = read1(readcharfun);
2565 if (!STRINGP(tmp)) {
2567 && UNBOUNDP(XCAR(tmp)))
2568 free_cons(XCONS(tmp));
2571 (Qinvalid_read_syntax,
2572 list1(build_string("#")));
2575 /* Read the intervals and their properties. */
2577 Lisp_Object beg, end, plist;
2581 beg = read1(readcharfun);
2582 if (CONSP(beg) && UNBOUNDP(XCAR(beg))) {
2583 ch = XCHAR(XCDR(beg));
2584 free_cons(XCONS(beg));
2595 UNBOUNDP(XCAR(end)))
2617 (Qinvalid_read_syntax,
2623 Fset_text_properties(beg, end, plist, tmp);
2630 /* #@NUMBER is used to skip NUMBER following characters.
2631 That's used in .elc files to skip over doc strings
2632 and function definitions. */
2635 /* Read a decimal integer. */
2636 while ((c = readchar(readcharfun)) >= 0
2637 && c >= '0' && c <= '9')
2639 (10 * nskip) + (c - '0');
2641 unreadchar(readcharfun, c);
2643 /* FSF has code here that maybe caches the skipped
2644 string. See above for why this is totally
2645 losing. We handle this differently. */
2647 /* Skip that many characters. */
2648 for (i = 0; i < nskip && c >= 0; i++)
2649 c = readchar(readcharfun);
2654 return Vload_file_name_internal;
2657 return read_bit_vector(readcharfun);
2658 /* #o10 => 8 -- octal constant syntax */
2660 return read_integer(readcharfun, 8);
2661 /* #xdead => 57005 -- hex constant syntax */
2663 return read_integer(readcharfun, 16);
2664 /* #b010 => 2 -- binary constant syntax */
2666 return read_integer(readcharfun, 2);
2669 Emchar _c_ = reader_nextchar(readcharfun);
2670 /* check for permutation syntax */
2673 read_vector(readcharfun, ']');
2674 if (ase_permutation_f) {
2675 return ase_permutation_f(perm);
2680 unreadchar(readcharfun, _c_);
2682 "unrecognised permutation syntax");
2684 Qinvalid_read_syntax, list1(err));
2689 /* #r"raw\stringt" -- raw string syntax */
2690 return read_raw_string(readcharfun);
2693 /* #s(foobar key1 val1 key2 val2) --
2694 * structure syntax */
2695 return read_structure(readcharfun);
2697 /* Check user readers */
2698 Lisp_Object uoname = read_string(readcharfun, ' ', 0);
2699 Lisp_Object ureader = ureader_find(uoname);
2701 return ureader_read(ureader, readcharfun);
2703 unreadchar(readcharfun, c);
2704 return Fsignal(Qinvalid_read_syntax,
2706 ("No ureader for"), uoname));
2708 #ifdef FEATUREP_SYNTAX
2711 Lisp_Object feature_exp, obj, tem;
2712 struct gcpro gcpro1, gcpro2;
2714 feature_exp = read0(readcharfun);
2715 obj = read0(readcharfun);
2717 /* the call to `featurep' may GC. */
2718 GCPRO2(feature_exp, obj);
2719 tem = call1(Qfeaturep, feature_exp);
2722 if (c == '+' && NILP(tem))
2724 if (c == '-' && !NILP(tem))
2739 /* Reader forms that can reuse previously read
2744 /* Using read_integer() here is impossible, because it
2745 chokes on `='. Using parse_integer() is too hard.
2746 So we simply read it in, and ignore overflows, which
2748 while (c >= '0' && c <= '9') {
2751 c = readchar(readcharfun);
2753 found = assq_no_quit(make_int(n), Vread_objects);
2755 /* #n=object returns object, but associates it
2762 (Qinvalid_read_syntax,
2764 (build_translated_string
2765 ("Multiply defined symbol label"),
2767 obj = read0(readcharfun);
2773 } else if (c == '#') {
2774 /* #n# returns a previously read object. */
2780 (Qinvalid_read_syntax,
2782 (build_translated_string
2783 ("Undefined symbol label"),
2786 return Fsignal(Qinvalid_read_syntax,
2791 unreadchar(readcharfun, c);
2792 return Fsignal(Qinvalid_read_syntax,
2801 return list2(Qquote, read0(readcharfun));
2803 #ifdef LISP_BACKQUOTES
2806 int speccount = specpdl_depth();
2807 ++new_backquote_flag;
2808 record_unwind_protect(backquote_unwind,
2810 (&new_backquote_flag));
2811 tem = read0(readcharfun);
2812 unbind_to(speccount, Qnil);
2813 return list2(Qbackquote, tem);
2817 if (new_backquote_flag) {
2818 Lisp_Object comma_type = Qnil;
2819 int ch = readchar(readcharfun);
2822 comma_type = Qcomma_at;
2824 comma_type = Qcomma_dot;
2827 unreadchar(readcharfun, ch);
2828 comma_type = Qcomma;
2830 return list2(comma_type, read0(readcharfun));
2832 /* YUCK. 99.999% backwards compatibility. The Right
2833 Thing(tm) is to signal an error here, because it's
2834 really invalid read syntax. Instead, this permits
2835 commas to begin symbols (unless they're inside
2836 backquotes). If an error is signalled here in the
2837 future, then commas should be invalid read syntax
2838 outside of backquotes anywhere they're found (i.e.
2839 they must be quoted in symbols) -- Stig */
2840 return read_atom(readcharfun, c, 0);
2846 /* Evil GNU Emacs "character" (ie integer) syntax */
2847 c = readchar(readcharfun);
2849 return Fsignal(Qend_of_file,
2850 list1(READCHARFUN_MAYBE
2854 c = read_escape(readcharfun);
2855 return make_char(c);
2860 return read_string(readcharfun, '\"', 0);
2863 /* Ignore whitespace and control characters */
2866 return read_atom(readcharfun, c, 0);
2878 /* for complex numbers */
2879 #define INTERMEDIATE_UNARY_SYMBOL 32
2880 #define LEAD_INT2 64
2881 #define DOT_CHAR2 128
2882 #define TRAIL_INT2 256
2884 #define EXP_INT2 1024
2890 isfloat_string(const char *cp)
2893 const Bufbyte *ucp = (const Bufbyte *)cp;
2895 if (*ucp == '+' || *ucp == '-')
2898 if (*ucp >= '0' && *ucp <= '9') {
2900 while (*ucp >= '0' && *ucp <= '9')
2907 if (*ucp >= '0' && *ucp <= '9') {
2909 while (*ucp >= '0' && *ucp <= '9')
2912 if (*ucp == 'e' || *ucp == 'E') {
2915 if ((*ucp == '+') || (*ucp == '-'))
2919 if (*ucp >= '0' && *ucp <= '9') {
2921 while (*ucp >= '0' && *ucp <= '9')
2924 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t')
2926 || (*ucp == '\r') || (*ucp == '\f'))
2927 && (state == (LEAD_INT | DOT_CHAR | TRAIL_INT)
2928 || state == (DOT_CHAR | TRAIL_INT)
2929 || state == (LEAD_INT | E_CHAR | EXP_INT)
2931 (LEAD_INT | DOT_CHAR | TRAIL_INT | E_CHAR | EXP_INT)
2932 || state == (DOT_CHAR | TRAIL_INT | E_CHAR | EXP_INT)));
2934 #endif /* HAVE_FPFLOAT */
2935 #if defined HAVE_MPC && defined WITH_MPC || \
2936 defined HAVE_PSEUC && defined WITH_PSEUC
2938 isbigc_string (const char *cp)
2941 const Bufbyte *ucp = (const Bufbyte *)cp;
2944 /* parse the real part */
2946 if (*ucp == '+' || *ucp == '-')
2949 if (*ucp >= '0' && *ucp <= '9') {
2951 while (*ucp >= '0' && *ucp <= '9')
2958 if (*ucp >= '0' && *ucp <= '9') {
2960 while (*ucp >= '0' && *ucp <= '9')
2963 if (*ucp == 'e' || *ucp == 'E') {
2966 if ((*ucp == '+') || (*ucp == '-'))
2970 if (*ucp >= '0' && *ucp <= '9') {
2972 while (*ucp >= '0' && *ucp <= '9')
2976 /* check if we had a real number until here */
2977 if (!(state == (LEAD_INT | DOT_CHAR | TRAIL_INT) ||
2978 state == (DOT_CHAR | TRAIL_INT) ||
2979 state == (LEAD_INT | E_CHAR | EXP_INT) ||
2980 state == (LEAD_INT | DOT_CHAR | TRAIL_INT | E_CHAR | EXP_INT) ||
2981 state == (DOT_CHAR | TRAIL_INT | E_CHAR | EXP_INT)))
2984 /* now parse imaginary part */
2986 if (*ucp == '+' || *ucp == '-') {
2987 state |= INTERMEDIATE_UNARY_SYMBOL;
2991 if (*ucp >= '0' && *ucp <= '9') {
2993 while (*ucp >= '0' && *ucp <= '9')
3000 if (*ucp >= '0' && *ucp <= '9') {
3001 state |= TRAIL_INT2;
3002 while (*ucp >= '0' && *ucp <= '9')
3005 if (*ucp == 'e' || *ucp == 'E') {
3008 if ((*ucp == '+') || (*ucp == '-'))
3012 if (*ucp >= '0' && *ucp <= '9') {
3014 while (*ucp >= '0' && *ucp <= '9')
3017 if (*ucp == 'i' || *ucp == 'I') {
3021 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t') ||
3022 (*ucp == '\n') || (*ucp == '\r') || (*ucp == '\f')) &&
3023 (state == (INTERMEDIATE_UNARY_SYMBOL | LEAD_INT2 | DOT_CHAR2 |
3024 TRAIL_INT2 | I_CHAR) ||
3025 state == (INTERMEDIATE_UNARY_SYMBOL | DOT_CHAR2 |
3026 TRAIL_INT2 | I_CHAR) ||
3027 state == (INTERMEDIATE_UNARY_SYMBOL | LEAD_INT2 |
3028 E_CHAR2 | EXP_INT2 | I_CHAR) ||
3029 state == (INTERMEDIATE_UNARY_SYMBOL | LEAD_INT2 | DOT_CHAR2 |
3030 TRAIL_INT2 | E_CHAR2 | EXP_INT2 | I_CHAR) ||
3031 state == (INTERMEDIATE_UNARY_SYMBOL | DOT_CHAR2 | TRAIL_INT2 |
3032 E_CHAR2 | EXP_INT2 | I_CHAR) ||
3033 state == (INTERMEDIATE_UNARY_SYMBOL | I_CHAR)));
3035 #endif /* HAVE_MPC */
3036 #if defined WITH_PSEUG && defined HAVE_PSEUG
3038 isgaussian_string (const char *cp)
3041 const Bufbyte *ucp = (const Bufbyte *)cp;
3044 /* parse the real part */
3046 if (*ucp == '+' || *ucp == '-')
3049 if (*ucp >= '0' && *ucp <= '9') {
3051 while (*ucp >= '0' && *ucp <= '9')
3055 /* check if we had a int number until here */
3056 if (!(state == (LEAD_INT)))
3059 /* now parse imaginary part */
3061 if (*ucp == '+' || *ucp == '-') {
3062 state |= INTERMEDIATE_UNARY_SYMBOL;
3066 if (*ucp >= '0' && *ucp <= '9') {
3068 while (*ucp >= '0' && *ucp <= '9')
3071 if (*ucp == 'i' || *ucp == 'I') {
3075 return (((*ucp == 0) || (*ucp == ' ') || (*ucp == '\t') ||
3076 (*ucp == '\n') || (*ucp == '\r') || (*ucp == '\f')) &&
3077 (state == (INTERMEDIATE_UNARY_SYMBOL | LEAD_INT2 | I_CHAR) ||
3078 state == (INTERMEDIATE_UNARY_SYMBOL | I_CHAR)));
3080 #endif /* HAVE_PSEUG */
3081 #if defined HAVE_MPQ && defined WITH_GMP
3083 isbigq_string (const char *cp)
3085 /* Possible minus/plus sign */
3086 if (*cp == '-' || *cp == '+')
3090 if (*cp < '0' || *cp > '9')
3095 } while (*cp >= '0' && *cp <= '9');
3102 if (*cp < '0' || *cp > '9')
3107 } while (*cp >= '0' && *cp <= '9');
3109 return *cp == '\0' || *cp == ' ' || *cp =='\t' || *cp == '\n' ||
3110 *cp == '\r' || *cp == '\f';
3112 #endif /* HAVE_MPQ */
3116 sequence_reader(Lisp_Object readcharfun,
3119 void*(*conser)(Lisp_Object, void*, Charcount))
3123 for (len = 0;; len++) {
3127 ch = reader_nextchar(readcharfun);
3129 if (ch == terminator)
3132 unreadchar(readcharfun, ch);
3133 #ifdef FEATUREP_SYNTAX
3135 read_syntax_error("\"]\" in a list");
3137 read_syntax_error("\")\" in a vector");
3139 state = ((conser) (readcharfun, state, len));
3143 struct read_list_state {
3147 int allow_dotted_lists;
3152 read_list_conser(Lisp_Object readcharfun, void *state, Charcount len)
3154 struct read_list_state *s = (struct read_list_state *)state;
3157 elt = read1(readcharfun);
3159 if (CONSP(elt) && UNBOUNDP(XCAR(elt))) {
3160 Lisp_Object tem = elt;
3164 free_cons(XCONS(tem));
3167 #ifdef FEATUREP_SYNTAX
3168 if (ch == s->terminator) {
3169 /* deal with #+, #- reader macros */
3170 unreadchar(readcharfun, s->terminator);
3172 } else if (ch == ']')
3173 read_syntax_error("']' in a list");
3175 read_syntax_error("')' in a vector");
3179 signal_simple_error("BUG! Internal reader error", elt);
3180 else if (!s->allow_dotted_lists)
3181 read_syntax_error("\".\" in a vector");
3184 XCDR(s->tail) = read0(readcharfun);
3186 s->head = read0(readcharfun);
3187 elt = read1(readcharfun);
3188 if (CONSP(elt) && UNBOUNDP(XCAR(elt))) {
3189 ch = XCHAR(XCDR(elt));
3190 free_cons(XCONS(elt));
3191 if (ch == s->terminator) {
3192 unreadchar(readcharfun, s->terminator);
3196 read_syntax_error(". in wrong context");
3199 #if 0 /* FSFmacs defun hack, or something ... */
3200 if (NILP(tail) && defun_hack && EQ(elt, Qdefun) && !read_pure) {
3201 record_unwind_protect(unreadpure, Qzero);
3206 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
3207 if (s->length == 1 && s->allow_dotted_lists && EQ(XCAR(s->head), Qfset)) {
3208 if (CONSP(elt) && EQ(XCAR(elt), Qquote) && CONSP(XCDR(elt)))
3209 Vcurrent_compiled_function_annotation = XCAR(XCDR(elt));
3211 Vcurrent_compiled_function_annotation = elt;
3215 elt = Fcons(elt, Qnil);
3217 XCDR(s->tail) = elt;
3226 #if 0 /* FSFmacs defun hack */
3227 /* -1 for allow_dotted_lists means allow_dotted_lists and check
3228 for starting with defun and make structure pure. */
3232 read_list(Lisp_Object readcharfun,
3234 int allow_dotted_lists, int check_for_doc_references)
3236 struct read_list_state s;
3237 struct gcpro gcpro1, gcpro2;
3238 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
3239 Lisp_Object old_compiled_function_annotation =
3240 Vcurrent_compiled_function_annotation;
3246 s.allow_dotted_lists = allow_dotted_lists;
3247 s.terminator = terminator;
3248 GCPRO2(s.head, s.tail);
3250 sequence_reader(readcharfun, terminator, &s, read_list_conser);
3251 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
3252 Vcurrent_compiled_function_annotation =
3253 old_compiled_function_annotation;
3256 if ((purify_flag || load_force_doc_strings) && check_for_doc_references) {
3257 /* check now for any doc string references and record them
3261 /* We might be dealing with an imperfect list so don't
3263 for (tail = s.head; CONSP(tail); tail = XCDR(tail)) {
3264 Lisp_Object holding_cons = Qnil;
3267 Lisp_Object elem = XCAR(tail);
3268 /* elem might be (#$ . INT) ... */
3270 && EQ(XCAR(elem), Vload_file_name_internal))
3271 holding_cons = tail;
3272 /* or it might be (quote (#$ . INT)) i.e.
3273 (quote . ((#$ . INT) . nil)) in the case of
3274 `autoload' (autoload evaluates its arguments, while
3275 `defvar', `defun', etc. don't). */
3276 if (CONSP(elem) && EQ(XCAR(elem), Qquote)
3277 && CONSP(XCDR(elem))) {
3278 elem = XCAR(XCDR(elem));
3281 Vload_file_name_internal))
3282 holding_cons = XCDR(XCAR(tail));
3286 if (CONSP(holding_cons)) {
3288 if (NILP(Vinternal_doc_file_name))
3289 /* We have not yet called
3290 Snarf-documentation, so
3291 assume this file is described
3293 Snarf-documentation will fill
3294 in the right value later.
3295 For now, replace the whole
3297 XCAR(holding_cons) = Qzero;
3299 /* We have already called
3300 Snarf-documentation, so make
3301 a relative file name for this
3302 file, so it can be found
3303 properly in the installed
3304 Lisp directory. We don't use
3305 Fexpand_file_name because
3306 that would make the directory
3308 XCAR(XCAR(holding_cons)) =
3309 concat2(build_string
3311 Ffile_name_nondirectory
3312 (Vload_file_name_internal));
3314 /* Not pure. Just add to
3315 Vload_force_doc_string_list, and the
3316 string will be filled in properly in
3317 load_force_doc_string_unwind(). */
3318 Vload_force_doc_string_list =
3319 /* We pass the cons that holds the
3320 (#$ . INT) so we can modify it
3323 Vload_force_doc_string_list);
3333 read_vector(Lisp_Object readcharfun, Emchar terminator)
3339 struct read_list_state s;
3340 struct gcpro gcpro1, gcpro2;
3345 s.allow_dotted_lists = 0;
3346 GCPRO2(s.head, s.tail);
3348 sequence_reader(readcharfun, terminator, &s, read_list_conser);
3352 len = XINT(Flength(tem));
3354 #if 0 /* FSFmacs defun hack */
3356 s.head = make_pure_vector(len, Qnil);
3359 s.head = make_vector(len, Qnil);
3361 for (i = 0, p = &(XVECTOR_DATA(s.head)[0]); i < len; i++, p++) {
3362 Lisp_Cons *otem = XCONS(tem);
3372 read_compiled_function(Lisp_Object readcharfun, Emchar terminator)
3374 /* Accept compiled functions at read-time so that we don't
3375 have to build them at load-time. */
3377 Lisp_Object make_byte_code_args[COMPILED_DOMAIN + 1];
3378 struct gcpro gcpro1;
3381 int saw_a_doc_ref = 0;
3383 /* Note: we tell read_list not to search for doc references
3384 because we need to handle the "doc reference" for the
3385 instructions and constants differently. */
3386 stuff = read_list(readcharfun, terminator, 0, 0);
3387 len = XINT(Flength(stuff));
3388 if (len < COMPILED_STACK_DEPTH + 1 || len > COMPILED_DOMAIN + 1)
3390 continuable_read_syntax_error
3391 ("#[...] used with wrong number of elements");
3393 for (iii = 0; CONSP(stuff); iii++) {
3394 Lisp_Cons *victim = XCONS(stuff);
3395 make_byte_code_args[iii] = Fcar(stuff);
3396 if ((purify_flag || load_force_doc_strings)
3397 && CONSP(make_byte_code_args[iii])
3398 && EQ(XCAR(make_byte_code_args[iii]),
3399 Vload_file_name_internal)) {
3400 if (purify_flag && iii == COMPILED_DOC_STRING) {
3401 /* same as in read_list(). */
3402 if (NILP(Vinternal_doc_file_name))
3403 make_byte_code_args[iii] = Qzero;
3405 XCAR(make_byte_code_args[iii]) =
3406 concat2(build_string("../lisp/"),
3407 Ffile_name_nondirectory
3408 (Vload_file_name_internal));
3412 stuff = Fcdr(stuff);
3415 GCPROn(make_byte_code_args, len);
3417 /* v18 or v19 bytecode file. Need to Ebolify. */
3418 if (load_byte_code_version < 20 && VECTORP(make_byte_code_args[2]))
3419 ebolify_bytecode_constants(make_byte_code_args[2]);
3421 /* make-byte-code looks at purify_flag, which should have the same
3422 * value as our "read-pure" argument */
3423 stuff = Fmake_byte_code(len, make_byte_code_args);
3424 XCOMPILED_FUNCTION(stuff)->flags.ebolified =
3425 (load_byte_code_version < 20);
3427 Vload_force_doc_string_list =
3428 Fcons(stuff, Vload_force_doc_string_list);
3433 void init_lread(void)
3435 char *stroot = NULL, *btroot = NULL;
3438 load_in_progress = 0;
3440 Vload_descriptor_list = Qnil;
3442 /* kludge: locate-file does not work for a null load-path, even if
3443 the file name is absolute. */
3445 Vload_path = Fcons(build_string(""), Qnil);
3446 /* The following is intended for the build chain only */
3447 if ((stroot = getenv("SOURCE_TREE_ROOT")) && strlen(stroot)) {
3448 Lisp_Object lispsubdir = build_string("lisp");
3449 Lisp_Object strootdir = build_string(stroot);
3450 Lisp_Object stlispdir =
3451 Fexpand_file_name(lispsubdir, strootdir);
3452 Vload_path = Fcons(stlispdir, Vload_path);
3454 if ((btroot = getenv("BUILD_TREE_ROOT")) && strlen(btroot)) {
3455 Lisp_Object lispsubdir = build_string("lisp");
3456 Lisp_Object btrootdir = build_string(btroot);
3457 Lisp_Object btlispdir =
3458 Fexpand_file_name(lispsubdir, btrootdir);
3459 Vload_path = Fcons(btlispdir, Vload_path);
3462 /* This used to get initialized in init_lread because all streams
3463 got closed when dumping occurs. This is no longer true --
3464 Vread_buffer_stream is a resizing output stream, and there is no
3465 reason to close it at dump-time.
3467 Vread_buffer_stream is set to Qnil in vars_of_lread, and this
3468 will initialize it only once, at dump-time. */
3469 if (NILP(Vread_buffer_stream))
3470 Vread_buffer_stream = make_resizing_buffer_output_stream();
3472 Vload_force_doc_string_list = Qnil;
3475 void syms_of_lread(void)
3478 DEFSUBR(Fread_from_string);
3479 DEFSUBR(Fload_internal);
3480 DEFSUBR(Flocate_file);
3481 DEFSUBR(Flocate_file_clear_hashing);
3482 DEFSUBR(Feval_buffer);
3483 DEFSUBR(Feval_region);
3485 defsymbol(&Qstandard_input, "standard-input");
3486 defsymbol(&Qread_char, "read-char");
3487 defsymbol(&Qcurrent_load_list, "current-load-list");
3488 defsymbol(&Qload, "load");
3489 defsymbol(&Qload_file_name, "load-file-name");
3490 defsymbol(&Qfset, "fset");
3492 #ifdef LISP_BACKQUOTES
3493 defsymbol(&Qbackquote, "backquote");
3494 defsymbol(&Qbacktick, "`");
3495 defsymbol(&Qcomma, ",");
3496 defsymbol(&Qcomma_at, ",@");
3497 defsymbol(&Qcomma_dot, ",.");
3500 defsymbol(&Qexists, "exists");
3501 defsymbol(&Qreadable, "readable");
3502 defsymbol(&Qwritable, "writable");
3503 defsymbol(&Qexecutable, "executable");
3506 void structure_type_create(void)
3508 the_structure_type_dynarr = Dynarr_new(structure_type);
3511 void reinit_vars_of_lread(void)
3513 Vread_buffer_stream = Qnil;
3514 staticpro_nodump(&Vread_buffer_stream);
3517 void vars_of_lread(void)
3519 reinit_vars_of_lread();
3521 DEFVAR_LISP("values", &Vvalues /*
3522 List of values of all expressions which were read, evaluated and printed.
3523 Order is reverse chronological.
3526 DEFVAR_LISP("standard-input", &Vstandard_input /*
3527 Stream for read to get input from.
3528 See documentation of `read' for possible values.
3530 Vstandard_input = Qt;
3532 DEFVAR_LISP("load-path", &Vload_path /*
3533 *List of directories to search for files to load.
3534 Each element is a string (directory name) or nil (try default directory).
3536 Note that the elements of this list *may not* begin with "~", so you must
3537 call `expand-file-name' on them before adding them to this list.
3539 Initialized based on EMACSLOADPATH environment variable, if any,
3540 otherwise to default specified in by file `paths.h' when SXEmacs was built.
3541 If there were no paths specified in `paths.h', then SXEmacs chooses a default
3542 value for this variable by looking around in the file-system near the
3543 directory in which the SXEmacs executable resides.
3547 /* xxxDEFVAR_LISP ("dump-load-path", &Vdump_load_path,
3548 "*Location of lisp files to be used when dumping ONLY."); */
3550 DEFVAR_BOOL("load-in-progress", &load_in_progress /*
3551 Non-nil iff inside of `load'.
3553 DEFVAR_LISP ("load-suppress-alist", &Vload_suppress_alist /*
3554 An alist of expressions controlling whether particular files can be loaded.
3555 Each element looks like (FILENAME EXPR).
3556 FILENAME should be a full pathname, but without the .el suffix.
3557 When `load' is run and is about to load the specified file, it evaluates
3558 the form to determine if the file can be loaded.
3559 This variable is normally initialized automatically.
3561 Vload_suppress_alist = Qnil;
3563 DEFVAR_LISP("after-load-alist", &Vafter_load_alist /*
3564 An alist of expressions to be evalled when particular files are loaded.
3565 Each element looks like (FILENAME FORMS...).
3566 When `load' is run and the file-name argument is FILENAME,
3567 the FORMS in the corresponding element are executed at the end of loading.
3569 FILENAME must match exactly! Normally FILENAME is the name of a library,
3570 with no directory specified, since that is how `load' is normally called.
3571 An error in FORMS does not undo the load,
3572 but does prevent execution of the rest of the FORMS.
3574 Vafter_load_alist = Qnil;
3576 DEFVAR_BOOL("load-warn-when-source-newer", &load_warn_when_source_newer /*
3577 *Whether `load' should check whether the source is newer than the binary.
3578 If this variable is true, then when a `.elc' file is being loaded and the
3579 corresponding `.el' is newer, a warning message will be printed.
3581 load_warn_when_source_newer = 0;
3583 DEFVAR_BOOL("load-warn-when-source-only", &load_warn_when_source_only /*
3584 *Whether `load' should warn when loading a `.el' file instead of an `.elc'.
3585 If this variable is true, then when `load' is called with a filename without
3586 an extension, and the `.elc' version doesn't exist but the `.el' version does,
3587 then a message will be printed. If an explicit extension is passed to `load',
3588 no warning will be printed.
3590 load_warn_when_source_only = 0;
3592 DEFVAR_BOOL("load-ignore-elc-files", &load_ignore_elc_files /*
3593 *Whether `load' should ignore `.elc' files when a suffix is not given.
3594 This is normally used only to bootstrap the `.elc' files when building SXEmacs.
3596 load_ignore_elc_files = 0;
3599 DEFVAR_LISP("load-history", &Vload_history /*
3600 Alist mapping source file names to symbols and features.
3601 Each alist element is a list that starts with a file name,
3602 except for one element (optional) that starts with nil and describes
3603 definitions evaluated from buffers not visiting files.
3604 The remaining elements of each list are symbols defined as functions
3605 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.
3607 Vload_history = Qnil;
3609 DEFVAR_LISP("current-load-list", &Vcurrent_load_list /*
3610 Used for internal purposes by `load'.
3612 Vcurrent_load_list = Qnil;
3615 DEFVAR_LISP("load-file-name", &Vload_file_name /*
3616 Full name of file being loaded by `load'.
3618 Vload_file_name = Qnil;
3620 DEFVAR_LISP("load-read-function", &Vload_read_function /*
3621 Function used by `load' and `eval-region' for reading expressions.
3622 The default is nil, which means use the function `read'.
3624 Vload_read_function = Qnil;
3626 DEFVAR_BOOL("load-force-doc-strings", &load_force_doc_strings /*
3627 Non-nil means `load' should force-load all dynamic doc strings.
3628 This is useful when the file being loaded is a temporary copy.
3630 load_force_doc_strings = 0;
3632 /* See read_escape(). */
3634 /* Used to be named `puke-on-fsf-keys' */
3635 DEFVAR_BOOL("fail-on-bucky-bit-character-escapes", &fail_on_bucky_bit_character_escapes /*
3636 Whether `read' should signal an error when it encounters unsupported
3637 character escape syntaxes or just read them incorrectly.
3639 fail_on_bucky_bit_character_escapes = 0;
3642 /* This must be initialized in init_lread otherwise it may start out
3643 with values saved when the image is dumped. */
3644 staticpro(&Vload_descriptor_list);
3646 /* Initialized in init_lread. */
3647 staticpro(&Vload_force_doc_string_list);
3649 Vload_file_name_internal = Qnil;
3650 staticpro(&Vload_file_name_internal);
3652 Vload_file_name_internal_the_purecopy = Qnil;
3653 staticpro(&Vload_file_name_internal_the_purecopy);
3655 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK
3656 Vcurrent_compiled_function_annotation = Qnil;
3657 staticpro(&Vcurrent_compiled_function_annotation);
3660 /* So that early-early stuff will work */
3661 Ffset(Qload, intern("load-internal"));
3663 #ifdef FEATUREP_SYNTAX
3664 defsymbol(&Qfeaturep, "featurep");
3665 Fprovide(intern("xemacs"));
3666 Fprovide(intern("sxemacs"));
3667 Fprovide(intern("raw-strings"));
3669 Fprovide(intern("infodock"));
3670 #endif /* INFODOCK */
3671 #endif /* FEATUREP_SYNTAX */
3673 #ifdef LISP_BACKQUOTES
3674 old_backquote_flag = new_backquote_flag = 0;
3678 Vfile_domain = Qnil;
3681 Vread_objects = Qnil;
3682 staticpro(&Vread_objects);
3684 Vlocate_file_hash_table = make_lisp_hash_table(200,
3685 HASH_TABLE_NON_WEAK,
3687 staticpro(&Vlocate_file_hash_table);
3688 #ifdef DEBUG_SXEMACS
3690 Lisp_Object tmp = intern("Vlocate-file-hash-table");
3691 symbol_value(XSYMBOL(tmp)) = Vlocate_file_hash_table;
3695 /* User defined readers */
3696 DEFVAR_LISP("ureaders", &Vureaders /*
3697 Alist of user defined readers.
3698 Car is ureader NAME, represented by string to match against when reading
3700 Cdr is user function called with one arg - string.
3701 Function must return lisp object or signal error.
3706 /* lread.c ends here */