Commit | Line | Data |
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c6045832 | 1 | /* Record indices of function doc strings stored in a file. |
4a2f9c6a | 2 | Copyright (C) 1985, 86, 93, 94, 95, 97, 1998 Free Software Foundation, Inc. |
c6045832 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
610f41b7 | 8 | the Free Software Foundation; either version 2, or (at your option) |
c6045832 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
c6045832 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
c6045832 JB |
23 | |
24 | #include <sys/types.h> | |
25 | #include <sys/file.h> /* Must be after sys/types.h for USG and BSD4_1*/ | |
26 | ||
27 | #ifdef USG5 | |
28 | #include <fcntl.h> | |
29 | #endif | |
30 | ||
29beb080 RS |
31 | #ifdef HAVE_UNISTD_H |
32 | #include <unistd.h> | |
33 | #endif | |
34 | ||
c6045832 JB |
35 | #ifndef O_RDONLY |
36 | #define O_RDONLY 0 | |
37 | #endif | |
38 | ||
c6045832 JB |
39 | #include "lisp.h" |
40 | #include "buffer.h" | |
665d3046 | 41 | #include "keyboard.h" |
141199d1 | 42 | #include "charset.h" |
c6045832 | 43 | |
9fbfa962 | 44 | Lisp_Object Vdoc_file_name; |
c6045832 | 45 | |
700ea809 RS |
46 | extern char *index (); |
47 | ||
9a425dcb RS |
48 | extern Lisp_Object Voverriding_local_map; |
49 | ||
778d47c7 RS |
50 | /* For VMS versions with limited file name syntax, |
51 | convert the name to something VMS will allow. */ | |
52 | static void | |
53 | munge_doc_file_name (name) | |
54 | char *name; | |
c6045832 | 55 | { |
c6045832 JB |
56 | #ifdef VMS |
57 | #ifndef VMS4_4 | |
58 | /* For VMS versions with limited file name syntax, | |
59 | convert the name to something VMS will allow. */ | |
60 | p = name; | |
61 | while (*p) | |
62 | { | |
63 | if (*p == '-') | |
64 | *p = '_'; | |
65 | p++; | |
66 | } | |
67 | #endif /* not VMS4_4 */ | |
68 | #ifdef VMS4_4 | |
69 | strcpy (name, sys_translate_unix (name)); | |
70 | #endif /* VMS4_4 */ | |
71 | #endif /* VMS */ | |
778d47c7 RS |
72 | } |
73 | ||
912e8480 RS |
74 | /* Buffer used for reading from documentation file. */ |
75 | static char *get_doc_string_buffer; | |
76 | static int get_doc_string_buffer_size; | |
77 | ||
700ea809 RS |
78 | /* Extract a doc string from a file. FILEPOS says where to get it. |
79 | If it is an integer, use that position in the standard DOC-... file. | |
80 | If it is (FILE . INTEGER), use FILE as the file name | |
0c00bc70 RS |
81 | and INTEGER as the position in that file. |
82 | But if INTEGER is negative, make it positive. | |
83 | (A negative integer is used for user variables, so we can distinguish | |
84 | them without actually fetching the doc string.) */ | |
700ea809 RS |
85 | |
86 | static Lisp_Object | |
778d47c7 | 87 | get_doc_string (filepos) |
700ea809 | 88 | Lisp_Object filepos; |
778d47c7 | 89 | { |
700ea809 | 90 | char *from, *to; |
778d47c7 RS |
91 | register int fd; |
92 | register char *name; | |
93 | register char *p, *p1; | |
778d47c7 | 94 | int minsize; |
0fded513 | 95 | int offset, position; |
700ea809 | 96 | Lisp_Object file, tem; |
778d47c7 | 97 | |
700ea809 RS |
98 | if (INTEGERP (filepos)) |
99 | { | |
100 | file = Vdoc_file_name; | |
101 | position = XINT (filepos); | |
102 | } | |
103 | else if (CONSP (filepos)) | |
104 | { | |
105 | file = XCONS (filepos)->car; | |
106 | position = XINT (XCONS (filepos)->cdr); | |
0c00bc70 RS |
107 | if (position < 0) |
108 | position = - position; | |
700ea809 RS |
109 | } |
110 | else | |
778d47c7 RS |
111 | return Qnil; |
112 | ||
700ea809 RS |
113 | if (!STRINGP (Vdoc_directory)) |
114 | return Qnil; | |
115 | ||
116 | if (!STRINGP (file)) | |
117 | return Qnil; | |
118 | ||
119 | /* Put the file name in NAME as a C string. | |
120 | If it is relative, combine it with Vdoc_directory. */ | |
121 | ||
122 | tem = Ffile_name_absolute_p (file); | |
123 | if (NILP (tem)) | |
124 | { | |
125 | minsize = XSTRING (Vdoc_directory)->size; | |
126 | /* sizeof ("../etc/") == 8 */ | |
127 | if (minsize < 8) | |
128 | minsize = 8; | |
129 | name = (char *) alloca (minsize + XSTRING (file)->size + 8); | |
130 | strcpy (name, XSTRING (Vdoc_directory)->data); | |
131 | strcat (name, XSTRING (file)->data); | |
132 | munge_doc_file_name (name); | |
133 | } | |
134 | else | |
135 | { | |
a039f534 | 136 | name = (char *) XSTRING (file)->data; |
700ea809 | 137 | } |
c6045832 JB |
138 | |
139 | fd = open (name, O_RDONLY, 0); | |
140 | if (fd < 0) | |
778d47c7 RS |
141 | { |
142 | #ifndef CANNOT_DUMP | |
143 | if (!NILP (Vpurify_flag)) | |
144 | { | |
145 | /* Preparing to dump; DOC file is probably not installed. | |
146 | So check in ../etc. */ | |
147 | strcpy (name, "../etc/"); | |
700ea809 | 148 | strcat (name, XSTRING (file)->data); |
778d47c7 RS |
149 | munge_doc_file_name (name); |
150 | ||
151 | fd = open (name, O_RDONLY, 0); | |
152 | } | |
153 | #endif | |
778d47c7 RS |
154 | if (fd < 0) |
155 | error ("Cannot open doc string file \"%s\"", name); | |
156 | } | |
157 | ||
0fded513 RS |
158 | /* Seek only to beginning of disk block. */ |
159 | offset = position % (8 * 1024); | |
160 | if (0 > lseek (fd, position - offset, 0)) | |
c6045832 JB |
161 | { |
162 | close (fd); | |
163 | error ("Position %ld out of range in doc string file \"%s\"", | |
700ea809 | 164 | position, name); |
c6045832 | 165 | } |
700ea809 | 166 | |
912e8480 RS |
167 | /* Read the doc string into get_doc_string_buffer. |
168 | P points beyond the data just read. */ | |
0fded513 | 169 | |
912e8480 | 170 | p = get_doc_string_buffer; |
700ea809 | 171 | while (1) |
c6045832 | 172 | { |
912e8480 RS |
173 | int space_left = (get_doc_string_buffer_size |
174 | - (p - get_doc_string_buffer)); | |
700ea809 RS |
175 | int nread; |
176 | ||
0fded513 | 177 | /* Allocate or grow the buffer if we need to. */ |
700ea809 RS |
178 | if (space_left == 0) |
179 | { | |
912e8480 RS |
180 | int in_buffer = p - get_doc_string_buffer; |
181 | get_doc_string_buffer_size += 16 * 1024; | |
182 | get_doc_string_buffer | |
183 | = (char *) xrealloc (get_doc_string_buffer, | |
184 | get_doc_string_buffer_size + 1); | |
185 | p = get_doc_string_buffer + in_buffer; | |
186 | space_left = (get_doc_string_buffer_size | |
187 | - (p - get_doc_string_buffer)); | |
700ea809 RS |
188 | } |
189 | ||
0fded513 RS |
190 | /* Read a disk block at a time. |
191 | If we read the same block last time, maybe skip this? */ | |
700ea809 RS |
192 | if (space_left > 1024 * 8) |
193 | space_left = 1024 * 8; | |
194 | nread = read (fd, p, space_left); | |
195 | if (nread < 0) | |
196 | { | |
197 | close (fd); | |
198 | error ("Read error on documentation file"); | |
199 | } | |
200 | p[nread] = 0; | |
201 | if (!nread) | |
c6045832 | 202 | break; |
912e8480 | 203 | if (p == get_doc_string_buffer) |
0fded513 RS |
204 | p1 = index (p + offset, '\037'); |
205 | else | |
206 | p1 = index (p, '\037'); | |
c6045832 JB |
207 | if (p1) |
208 | { | |
209 | *p1 = 0; | |
210 | p = p1; | |
211 | break; | |
212 | } | |
700ea809 | 213 | p += nread; |
c6045832 JB |
214 | } |
215 | close (fd); | |
700ea809 RS |
216 | |
217 | /* Scan the text and perform quoting with ^A (char code 1). | |
218 | ^A^A becomes ^A, ^A0 becomes a null char, and ^A_ becomes a ^_. */ | |
912e8480 RS |
219 | from = get_doc_string_buffer + offset; |
220 | to = get_doc_string_buffer + offset; | |
700ea809 RS |
221 | while (from != p) |
222 | { | |
223 | if (*from == 1) | |
224 | { | |
225 | int c; | |
226 | ||
227 | from++; | |
228 | c = *from++; | |
229 | if (c == 1) | |
230 | *to++ = c; | |
231 | else if (c == '0') | |
232 | *to++ = 0; | |
233 | else if (c == '_') | |
234 | *to++ = 037; | |
235 | else | |
236 | error ("Invalid data in documentation file -- ^A followed by code 0%o", c); | |
237 | } | |
238 | else | |
239 | *to++ = *from++; | |
240 | } | |
241 | ||
912e8480 RS |
242 | return make_string (get_doc_string_buffer + offset, |
243 | to - (get_doc_string_buffer + offset)); | |
700ea809 RS |
244 | } |
245 | ||
246 | /* Get a string from position FILEPOS and pass it through the Lisp reader. | |
247 | We use this for fetching the bytecode string and constants vector | |
248 | of a compiled function from the .elc file. */ | |
249 | ||
250 | Lisp_Object | |
251 | read_doc_string (filepos) | |
252 | Lisp_Object filepos; | |
253 | { | |
254 | return Fread (get_doc_string (filepos)); | |
c6045832 JB |
255 | } |
256 | ||
ee04dc54 | 257 | DEFUN ("documentation", Fdocumentation, Sdocumentation, 1, 2, 0, |
08564963 | 258 | "Return the documentation string of FUNCTION.\n\ |
4acb738e | 259 | Unless a non-nil second argument RAW is given, the\n\ |
ee04dc54 | 260 | string is passed through `substitute-command-keys'.") |
502ddf23 JB |
261 | (function, raw) |
262 | Lisp_Object function, raw; | |
c6045832 JB |
263 | { |
264 | Lisp_Object fun; | |
265 | Lisp_Object funcar; | |
ee04dc54 | 266 | Lisp_Object tem, doc; |
c6045832 | 267 | |
502ddf23 | 268 | fun = Findirect_function (function); |
c6045832 | 269 | |
5b5f6883 | 270 | if (SUBRP (fun)) |
c6045832 | 271 | { |
c6045832 | 272 | if (XSUBR (fun)->doc == 0) return Qnil; |
f0f787b8 | 273 | if ((EMACS_INT) XSUBR (fun)->doc >= 0) |
ee04dc54 | 274 | doc = build_string (XSUBR (fun)->doc); |
c6045832 | 275 | else |
700ea809 | 276 | doc = get_doc_string (make_number (- (EMACS_INT) XSUBR (fun)->doc)); |
5b5f6883 KH |
277 | } |
278 | else if (COMPILEDP (fun)) | |
279 | { | |
f9b4aacf | 280 | if ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) <= COMPILED_DOC_STRING) |
c6045832 JB |
281 | return Qnil; |
282 | tem = XVECTOR (fun)->contents[COMPILED_DOC_STRING]; | |
e6d12642 | 283 | if (STRINGP (tem)) |
ee04dc54 | 284 | doc = tem; |
700ea809 RS |
285 | else if (NATNUMP (tem) || CONSP (tem)) |
286 | doc = get_doc_string (tem); | |
ee04dc54 RM |
287 | else |
288 | return Qnil; | |
5b5f6883 KH |
289 | } |
290 | else if (STRINGP (fun) || VECTORP (fun)) | |
291 | { | |
c6045832 | 292 | return build_string ("Keyboard macro."); |
5b5f6883 KH |
293 | } |
294 | else if (CONSP (fun)) | |
295 | { | |
c6045832 | 296 | funcar = Fcar (fun); |
e6d12642 | 297 | if (!SYMBOLP (funcar)) |
c6045832 | 298 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
502ddf23 | 299 | else if (EQ (funcar, Qkeymap)) |
c6045832 JB |
300 | return build_string ("Prefix command (definition is a keymap associating keystrokes with\n\ |
301 | subcommands.)"); | |
502ddf23 JB |
302 | else if (EQ (funcar, Qlambda) |
303 | || EQ (funcar, Qautoload)) | |
c6045832 | 304 | { |
ae44f7a4 RS |
305 | Lisp_Object tem1; |
306 | tem1 = Fcdr (Fcdr (fun)); | |
307 | tem = Fcar (tem1); | |
e6d12642 | 308 | if (STRINGP (tem)) |
ee04dc54 | 309 | doc = tem; |
ae44f7a4 RS |
310 | /* Handle a doc reference--but these never come last |
311 | in the function body, so reject them if they are last. */ | |
312 | else if ((NATNUMP (tem) || CONSP (tem)) | |
313 | && ! NILP (XCONS (tem1)->cdr)) | |
700ea809 | 314 | doc = get_doc_string (tem); |
ee04dc54 RM |
315 | else |
316 | return Qnil; | |
c6045832 | 317 | } |
502ddf23 | 318 | else if (EQ (funcar, Qmocklisp)) |
c6045832 | 319 | return Qnil; |
502ddf23 | 320 | else if (EQ (funcar, Qmacro)) |
ee04dc54 | 321 | return Fdocumentation (Fcdr (fun), raw); |
5b5f6883 KH |
322 | else |
323 | goto oops; | |
324 | } | |
325 | else | |
326 | { | |
327 | oops: | |
328 | Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
c6045832 | 329 | } |
ee04dc54 | 330 | |
956ace37 | 331 | if (NILP (raw)) |
665d3046 JB |
332 | { |
333 | struct gcpro gcpro1; | |
334 | ||
335 | GCPRO1 (doc); | |
336 | doc = Fsubstitute_command_keys (doc); | |
337 | UNGCPRO; | |
338 | } | |
ee04dc54 | 339 | return doc; |
c6045832 JB |
340 | } |
341 | ||
b6c53774 | 342 | DEFUN ("documentation-property", Fdocumentation_property, Sdocumentation_property, 2, 3, 0, |
c6045832 | 343 | "Return the documentation string that is SYMBOL's PROP property.\n\ |
ee04dc54 | 344 | This is like `get', but it can refer to strings stored in the\n\ |
08564963 | 345 | `etc/DOC' file; and if the value is a string, it is passed through\n\ |
4acb738e | 346 | `substitute-command-keys'. A non-nil third argument RAW avoids this\n\ |
956ace37 | 347 | translation.") |
4acb738e EN |
348 | (symbol, prop, raw) |
349 | Lisp_Object symbol, prop, raw; | |
c6045832 JB |
350 | { |
351 | register Lisp_Object tem; | |
352 | ||
4acb738e | 353 | tem = Fget (symbol, prop); |
e6d12642 | 354 | if (INTEGERP (tem)) |
700ea809 RS |
355 | tem = get_doc_string (XINT (tem) > 0 ? tem : make_number (- XINT (tem))); |
356 | else if (CONSP (tem)) | |
357 | tem = get_doc_string (tem); | |
e6d12642 | 358 | if (NILP (raw) && STRINGP (tem)) |
992d176e RS |
359 | return Fsubstitute_command_keys (tem); |
360 | return tem; | |
c6045832 JB |
361 | } |
362 | \f | |
283e1184 JB |
363 | /* Scanning the DOC files and placing docstring offsets into functions. */ |
364 | ||
365 | static void | |
366 | store_function_docstring (fun, offset) | |
367 | Lisp_Object fun; | |
e343d389 RS |
368 | /* Use EMACS_INT because we get this from pointer subtraction. */ |
369 | EMACS_INT offset; | |
283e1184 JB |
370 | { |
371 | fun = indirect_function (fun); | |
372 | ||
373 | /* The type determines where the docstring is stored. */ | |
374 | ||
375 | /* Lisp_Subrs have a slot for it. */ | |
e6d12642 | 376 | if (SUBRP (fun)) |
283e1184 JB |
377 | XSUBR (fun)->doc = (char *) - offset; |
378 | ||
379 | /* If it's a lisp form, stick it in the form. */ | |
380 | else if (CONSP (fun)) | |
381 | { | |
382 | Lisp_Object tem; | |
383 | ||
384 | tem = XCONS (fun)->car; | |
385 | if (EQ (tem, Qlambda) || EQ (tem, Qautoload)) | |
386 | { | |
387 | tem = Fcdr (Fcdr (fun)); | |
e6d12642 | 388 | if (CONSP (tem) && INTEGERP (XCONS (tem)->car)) |
2ee7863a | 389 | XSETFASTINT (XCONS (tem)->car, offset); |
283e1184 JB |
390 | } |
391 | else if (EQ (tem, Qmacro)) | |
392 | store_function_docstring (XCONS (fun)->cdr, offset); | |
393 | } | |
394 | ||
395 | /* Bytecode objects sometimes have slots for it. */ | |
e6d12642 | 396 | else if (COMPILEDP (fun)) |
283e1184 JB |
397 | { |
398 | /* This bytecode object must have a slot for the | |
399 | docstring, since we've found a docstring for it. */ | |
f9b4aacf | 400 | if ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) > COMPILED_DOC_STRING) |
2ee7863a | 401 | XSETFASTINT (XVECTOR (fun)->contents[COMPILED_DOC_STRING], offset); |
283e1184 JB |
402 | } |
403 | } | |
404 | ||
405 | ||
c6045832 JB |
406 | DEFUN ("Snarf-documentation", Fsnarf_documentation, Ssnarf_documentation, |
407 | 1, 1, 0, | |
408 | "Used during Emacs initialization, before dumping runnable Emacs,\n\ | |
08564963 | 409 | to find pointers to doc strings stored in `etc/DOC...' and\n\ |
c6045832 JB |
410 | record them in function definitions.\n\ |
411 | One arg, FILENAME, a string which does not include a directory.\n\ | |
08564963 | 412 | The file is found in `../etc' now; found in the `data-directory'\n\ |
c6045832 JB |
413 | when doc strings are referred to later in the dumped Emacs.") |
414 | (filename) | |
415 | Lisp_Object filename; | |
416 | { | |
417 | int fd; | |
418 | char buf[1024 + 1]; | |
419 | register int filled; | |
420 | register int pos; | |
421 | register char *p, *end; | |
422 | Lisp_Object sym, fun, tem; | |
423 | char *name; | |
424 | extern char *index (); | |
425 | ||
2bda628c JB |
426 | #ifndef CANNOT_DUMP |
427 | if (NILP (Vpurify_flag)) | |
428 | error ("Snarf-documentation can only be called in an undumped Emacs"); | |
429 | #endif | |
430 | ||
c6045832 JB |
431 | CHECK_STRING (filename, 0); |
432 | ||
433 | #ifndef CANNOT_DUMP | |
6367dc09 | 434 | name = (char *) alloca (XSTRING (filename)->size + 14); |
08564963 | 435 | strcpy (name, "../etc/"); |
c6045832 | 436 | #else /* CANNOT_DUMP */ |
ba870521 | 437 | CHECK_STRING (Vdoc_directory, 0); |
c6045832 | 438 | name = (char *) alloca (XSTRING (filename)->size + |
ba870521 KH |
439 | XSTRING (Vdoc_directory)->size + 1); |
440 | strcpy (name, XSTRING (Vdoc_directory)->data); | |
c6045832 JB |
441 | #endif /* CANNOT_DUMP */ |
442 | strcat (name, XSTRING (filename)->data); /*** Add this line ***/ | |
443 | #ifdef VMS | |
444 | #ifndef VMS4_4 | |
445 | /* For VMS versions with limited file name syntax, | |
446 | convert the name to something VMS will allow. */ | |
447 | p = name; | |
448 | while (*p) | |
449 | { | |
450 | if (*p == '-') | |
451 | *p = '_'; | |
452 | p++; | |
453 | } | |
454 | #endif /* not VMS4_4 */ | |
455 | #ifdef VMS4_4 | |
456 | strcpy (name, sys_translate_unix (name)); | |
457 | #endif /* VMS4_4 */ | |
458 | #endif /* VMS */ | |
459 | ||
460 | fd = open (name, O_RDONLY, 0); | |
461 | if (fd < 0) | |
462 | report_file_error ("Opening doc string file", | |
463 | Fcons (build_string (name), Qnil)); | |
464 | Vdoc_file_name = filename; | |
465 | filled = 0; | |
466 | pos = 0; | |
467 | while (1) | |
468 | { | |
469 | if (filled < 512) | |
470 | filled += read (fd, &buf[filled], sizeof buf - 1 - filled); | |
471 | if (!filled) | |
472 | break; | |
473 | ||
474 | buf[filled] = 0; | |
475 | p = buf; | |
476 | end = buf + (filled < 512 ? filled : filled - 128); | |
477 | while (p != end && *p != '\037') p++; | |
478 | /* p points to ^_Ffunctionname\n or ^_Vvarname\n. */ | |
479 | if (p != end) | |
480 | { | |
481 | end = index (p, '\n'); | |
141199d1 RS |
482 | sym = oblookup (Vobarray, p + 2, |
483 | multibyte_chars_in_text (p + 2, end - p - 2), | |
484 | end - p - 2); | |
e6d12642 | 485 | if (SYMBOLP (sym)) |
c6045832 JB |
486 | { |
487 | /* Attach a docstring to a variable? */ | |
488 | if (p[1] == 'V') | |
489 | { | |
490 | /* Install file-position as variable-documentation property | |
491 | and make it negative for a user-variable | |
492 | (doc starts with a `*'). */ | |
493 | Fput (sym, Qvariable_documentation, | |
494 | make_number ((pos + end + 1 - buf) | |
495 | * (end[1] == '*' ? -1 : 1))); | |
496 | } | |
497 | ||
283e1184 | 498 | /* Attach a docstring to a function? */ |
c6045832 | 499 | else if (p[1] == 'F') |
283e1184 JB |
500 | store_function_docstring (sym, pos + end + 1 - buf); |
501 | ||
502 | else | |
503 | error ("DOC file invalid at position %d", pos); | |
c6045832 JB |
504 | } |
505 | } | |
506 | pos += end - buf; | |
507 | filled -= end - buf; | |
508 | bcopy (end, buf, filled); | |
509 | } | |
510 | close (fd); | |
511 | return Qnil; | |
512 | } | |
513 | \f | |
514 | DEFUN ("substitute-command-keys", Fsubstitute_command_keys, | |
515 | Ssubstitute_command_keys, 1, 1, 0, | |
516 | "Substitute key descriptions for command names in STRING.\n\ | |
517 | Return a new string which is STRING with substrings of the form \\=\\[COMMAND]\n\ | |
518 | replaced by either: a keystroke sequence that will invoke COMMAND,\n\ | |
519 | or \"M-x COMMAND\" if COMMAND is not on any keys.\n\ | |
520 | Substrings of the form \\=\\{MAPVAR} are replaced by summaries\n\ | |
521 | \(made by describe-bindings) of the value of MAPVAR, taken as a keymap.\n\ | |
522 | Substrings of the form \\=\\<MAPVAR> specify to use the value of MAPVAR\n\ | |
523 | as the keymap for future \\=\\[COMMAND] substrings.\n\ | |
524 | \\=\\= quotes the following character and is discarded;\n\ | |
525 | thus, \\=\\=\\=\\= puts \\=\\= into the output, and \\=\\=\\=\\[ puts \\=\\[ into the output.") | |
4acb738e EN |
526 | (string) |
527 | Lisp_Object string; | |
c6045832 JB |
528 | { |
529 | unsigned char *buf; | |
530 | int changed = 0; | |
531 | register unsigned char *strp; | |
532 | register unsigned char *bufp; | |
533 | int idx; | |
534 | int bsize; | |
535 | unsigned char *new; | |
665d3046 | 536 | Lisp_Object tem; |
c6045832 JB |
537 | Lisp_Object keymap; |
538 | unsigned char *start; | |
2d0aa229 | 539 | int length, length_byte; |
665d3046 JB |
540 | Lisp_Object name; |
541 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
141199d1 RS |
542 | int multibyte; |
543 | int nchars; | |
c6045832 | 544 | |
4acb738e | 545 | if (NILP (string)) |
c6045832 JB |
546 | return Qnil; |
547 | ||
4acb738e | 548 | CHECK_STRING (string, 0); |
665d3046 JB |
549 | tem = Qnil; |
550 | keymap = Qnil; | |
551 | name = Qnil; | |
4acb738e | 552 | GCPRO4 (string, tem, keymap, name); |
c6045832 | 553 | |
141199d1 RS |
554 | multibyte = STRING_MULTIBYTE (string); |
555 | nchars = 0; | |
556 | ||
9a425dcb RS |
557 | /* KEYMAP is either nil (which means search all the active keymaps) |
558 | or a specified local map (which means search just that and the | |
559 | global map). If non-nil, it might come from Voverriding_local_map, | |
4acb738e | 560 | or from a \\<mapname> construct in STRING itself.. */ |
f73d1163 KH |
561 | keymap = current_kboard->Voverriding_terminal_local_map; |
562 | if (NILP (keymap)) | |
563 | keymap = Voverriding_local_map; | |
c6045832 | 564 | |
fc932ac6 | 565 | bsize = STRING_BYTES (XSTRING (string)); |
c6045832 JB |
566 | bufp = buf = (unsigned char *) xmalloc (bsize); |
567 | ||
4acb738e | 568 | strp = (unsigned char *) XSTRING (string)->data; |
fc932ac6 | 569 | while (strp < XSTRING (string)->data + STRING_BYTES (XSTRING (string))) |
c6045832 JB |
570 | { |
571 | if (strp[0] == '\\' && strp[1] == '=') | |
572 | { | |
573 | /* \= quotes the next character; | |
574 | thus, to put in \[ without its special meaning, use \=\[. */ | |
575 | changed = 1; | |
141199d1 RS |
576 | strp += 2; |
577 | if (multibyte) | |
578 | { | |
579 | int len; | |
fc932ac6 | 580 | int maxlen = XSTRING (string)->data + STRING_BYTES (XSTRING (string)) - strp; |
141199d1 RS |
581 | |
582 | STRING_CHAR_AND_LENGTH (strp, maxlen, len); | |
583 | if (len == 1) | |
584 | *bufp = *strp; | |
585 | else | |
586 | bcopy (strp, bufp, len); | |
587 | strp += len; | |
588 | bufp += len; | |
589 | nchars++; | |
590 | } | |
591 | else | |
592 | *bufp++ = *strp++, nchars++; | |
c6045832 JB |
593 | } |
594 | else if (strp[0] == '\\' && strp[1] == '[') | |
595 | { | |
b6c53774 RS |
596 | Lisp_Object firstkey; |
597 | ||
c6045832 JB |
598 | changed = 1; |
599 | strp += 2; /* skip \[ */ | |
600 | start = strp; | |
601 | ||
4acb738e | 602 | while ((strp - (unsigned char *) XSTRING (string)->data |
fc932ac6 | 603 | < STRING_BYTES (XSTRING (string))) |
c6045832 JB |
604 | && *strp != ']') |
605 | strp++; | |
141199d1 RS |
606 | length_byte = strp - start; |
607 | ||
c6045832 JB |
608 | strp++; /* skip ] */ |
609 | ||
610 | /* Save STRP in IDX. */ | |
4acb738e | 611 | idx = strp - (unsigned char *) XSTRING (string)->data; |
141199d1 | 612 | tem = Fintern (make_string (start, length_byte), Qnil); |
9a425dcb | 613 | tem = Fwhere_is_internal (tem, keymap, Qt, Qnil); |
c6045832 | 614 | |
b6c53774 RS |
615 | /* Disregard menu bar bindings; it is positively annoying to |
616 | mention them when there's no menu bar, and it isn't terribly | |
617 | useful even when there is a menu bar. */ | |
ef586bbd RS |
618 | if (!NILP (tem)) |
619 | { | |
620 | firstkey = Faref (tem, make_number (0)); | |
621 | if (EQ (firstkey, Qmenu_bar)) | |
622 | tem = Qnil; | |
623 | } | |
b6c53774 | 624 | |
265a9e55 | 625 | if (NILP (tem)) /* but not on any keys */ |
c6045832 JB |
626 | { |
627 | new = (unsigned char *) xrealloc (buf, bsize += 4); | |
628 | bufp += new - buf; | |
629 | buf = new; | |
630 | bcopy ("M-x ", bufp, 4); | |
631 | bufp += 4; | |
141199d1 RS |
632 | nchars += 4; |
633 | if (multibyte) | |
634 | length = multibyte_chars_in_text (start, length_byte); | |
635 | else | |
636 | length = length_byte; | |
c6045832 JB |
637 | goto subst; |
638 | } | |
639 | else | |
640 | { /* function is on a key */ | |
641 | tem = Fkey_description (tem); | |
642 | goto subst_string; | |
643 | } | |
644 | } | |
645 | /* \{foo} is replaced with a summary of the keymap (symbol-value foo). | |
646 | \<foo> just sets the keymap used for \[cmd]. */ | |
647 | else if (strp[0] == '\\' && (strp[1] == '{' || strp[1] == '<')) | |
648 | { | |
649 | struct buffer *oldbuf; | |
c6045832 JB |
650 | |
651 | changed = 1; | |
652 | strp += 2; /* skip \{ or \< */ | |
653 | start = strp; | |
654 | ||
4acb738e EN |
655 | while ((strp - (unsigned char *) XSTRING (string)->data |
656 | < XSTRING (string)->size) | |
c6045832 JB |
657 | && *strp != '}' && *strp != '>') |
658 | strp++; | |
141199d1 RS |
659 | |
660 | length_byte = strp - start; | |
c6045832 JB |
661 | strp++; /* skip } or > */ |
662 | ||
663 | /* Save STRP in IDX. */ | |
4acb738e | 664 | idx = strp - (unsigned char *) XSTRING (string)->data; |
c6045832 JB |
665 | |
666 | /* Get the value of the keymap in TEM, or nil if undefined. | |
667 | Do this while still in the user's current buffer | |
668 | in case it is a local variable. */ | |
141199d1 | 669 | name = Fintern (make_string (start, length_byte), Qnil); |
c6045832 | 670 | tem = Fboundp (name); |
265a9e55 | 671 | if (! NILP (tem)) |
c6045832 JB |
672 | { |
673 | tem = Fsymbol_value (name); | |
265a9e55 | 674 | if (! NILP (tem)) |
665d3046 | 675 | tem = get_keymap_1 (tem, 0, 1); |
c6045832 JB |
676 | } |
677 | ||
678 | /* Now switch to a temp buffer. */ | |
679 | oldbuf = current_buffer; | |
680 | set_buffer_internal (XBUFFER (Vprin1_to_string_buffer)); | |
681 | ||
265a9e55 | 682 | if (NILP (tem)) |
c6045832 JB |
683 | { |
684 | name = Fsymbol_name (name); | |
685 | insert_string ("\nUses keymap \""); | |
141199d1 RS |
686 | insert_from_string (name, 0, 0, |
687 | XSTRING (name)->size, | |
fc932ac6 | 688 | STRING_BYTES (XSTRING (name)), 1); |
c6045832 JB |
689 | insert_string ("\", which is not currently defined.\n"); |
690 | if (start[-1] == '<') keymap = Qnil; | |
691 | } | |
692 | else if (start[-1] == '<') | |
693 | keymap = tem; | |
694 | else | |
7523d17c | 695 | describe_map_tree (tem, 1, Qnil, Qnil, (char *)0, 1, 0, 0); |
c6045832 JB |
696 | tem = Fbuffer_string (); |
697 | Ferase_buffer (); | |
698 | set_buffer_internal (oldbuf); | |
699 | ||
700 | subst_string: | |
701 | start = XSTRING (tem)->data; | |
702 | length = XSTRING (tem)->size; | |
fc932ac6 | 703 | length_byte = STRING_BYTES (XSTRING (tem)); |
c6045832 | 704 | subst: |
141199d1 | 705 | new = (unsigned char *) xrealloc (buf, bsize += length_byte); |
c6045832 JB |
706 | bufp += new - buf; |
707 | buf = new; | |
141199d1 RS |
708 | bcopy (start, bufp, length_byte); |
709 | bufp += length_byte; | |
710 | nchars += length; | |
4acb738e EN |
711 | /* Check STRING again in case gc relocated it. */ |
712 | strp = (unsigned char *) XSTRING (string)->data + idx; | |
c6045832 | 713 | } |
141199d1 RS |
714 | else if (! multibyte) /* just copy other chars */ |
715 | *bufp++ = *strp++, nchars++; | |
716 | else | |
717 | { | |
718 | int len; | |
fc932ac6 | 719 | int maxlen = XSTRING (string)->data + STRING_BYTES (XSTRING (string)) - strp; |
141199d1 RS |
720 | |
721 | STRING_CHAR_AND_LENGTH (strp, maxlen, len); | |
722 | if (len == 1) | |
723 | *bufp = *strp; | |
724 | else | |
725 | bcopy (strp, bufp, len); | |
726 | strp += len; | |
727 | bufp += len; | |
728 | nchars++; | |
729 | } | |
c6045832 JB |
730 | } |
731 | ||
732 | if (changed) /* don't bother if nothing substituted */ | |
cc5bf9eb | 733 | tem = make_string_from_bytes (buf, nchars, bufp - buf); |
c6045832 | 734 | else |
4acb738e | 735 | tem = string; |
9ac0d9e0 | 736 | xfree (buf); |
665d3046 | 737 | RETURN_UNGCPRO (tem); |
c6045832 JB |
738 | } |
739 | \f | |
dfcf069d | 740 | void |
c6045832 JB |
741 | syms_of_doc () |
742 | { | |
743 | DEFVAR_LISP ("internal-doc-file-name", &Vdoc_file_name, | |
744 | "Name of file containing documentation strings of built-in symbols."); | |
745 | Vdoc_file_name = Qnil; | |
746 | ||
747 | defsubr (&Sdocumentation); | |
748 | defsubr (&Sdocumentation_property); | |
749 | defsubr (&Ssnarf_documentation); | |
750 | defsubr (&Ssubstitute_command_keys); | |
751 | } |