Commit | Line | Data |
---|---|---|
c6045832 | 1 | /* Record indices of function doc strings stored in a file. |
32d1b897 | 2 | Copyright (C) 1985, 86,93,94,95,97,98,99, 2000 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" |
8feddab4 | 43 | #include "keymap.h" |
c6045832 | 44 | |
8892f40b GM |
45 | #ifdef HAVE_INDEX |
46 | extern char *index P_ ((const char *, int)); | |
a847af86 GM |
47 | #endif |
48 | ||
512ca171 | 49 | Lisp_Object Vdoc_file_name; |
c6045832 | 50 | |
9191c8ae GM |
51 | Lisp_Object Qfunction_documentation; |
52 | ||
9a425dcb RS |
53 | extern Lisp_Object Voverriding_local_map; |
54 | ||
778d47c7 RS |
55 | /* For VMS versions with limited file name syntax, |
56 | convert the name to something VMS will allow. */ | |
57 | static void | |
58 | munge_doc_file_name (name) | |
59 | char *name; | |
c6045832 | 60 | { |
c6045832 JB |
61 | #ifdef VMS |
62 | #ifndef VMS4_4 | |
63 | /* For VMS versions with limited file name syntax, | |
64 | convert the name to something VMS will allow. */ | |
65 | p = name; | |
66 | while (*p) | |
67 | { | |
68 | if (*p == '-') | |
69 | *p = '_'; | |
70 | p++; | |
71 | } | |
72 | #endif /* not VMS4_4 */ | |
73 | #ifdef VMS4_4 | |
74 | strcpy (name, sys_translate_unix (name)); | |
75 | #endif /* VMS4_4 */ | |
76 | #endif /* VMS */ | |
778d47c7 RS |
77 | } |
78 | ||
912e8480 RS |
79 | /* Buffer used for reading from documentation file. */ |
80 | static char *get_doc_string_buffer; | |
81 | static int get_doc_string_buffer_size; | |
82 | ||
32caae30 | 83 | static unsigned char *read_bytecode_pointer; |
87afdd65 | 84 | Lisp_Object Fsnarf_documentation P_ ((Lisp_Object)); |
32caae30 RS |
85 | |
86 | /* readchar in lread.c calls back here to fetch the next byte. | |
87 | If UNREADFLAG is 1, we unread a byte. */ | |
88 | ||
89 | int | |
90 | read_bytecode_char (unreadflag) | |
33711cc9 | 91 | int unreadflag; |
32caae30 RS |
92 | { |
93 | if (unreadflag) | |
94 | { | |
95 | read_bytecode_pointer--; | |
96 | return 0; | |
97 | } | |
98 | return *read_bytecode_pointer++; | |
99 | } | |
100 | ||
700ea809 RS |
101 | /* Extract a doc string from a file. FILEPOS says where to get it. |
102 | If it is an integer, use that position in the standard DOC-... file. | |
103 | If it is (FILE . INTEGER), use FILE as the file name | |
0c00bc70 RS |
104 | and INTEGER as the position in that file. |
105 | But if INTEGER is negative, make it positive. | |
106 | (A negative integer is used for user variables, so we can distinguish | |
ba29c3c9 RS |
107 | them without actually fetching the doc string.) |
108 | ||
a154a4ef SM |
109 | If the location does not point to the beginning of a docstring |
110 | (e.g. because the file has been modified and the location is stale), | |
111 | return nil. | |
112 | ||
e96179b3 RS |
113 | If UNIBYTE is nonzero, always make a unibyte string. |
114 | ||
f1df0d67 RS |
115 | If DEFINITION is nonzero, assume this is for reading |
116 | a dynamic function definition; convert the bytestring | |
117 | and the constants vector with appropriate byte handling, | |
118 | and return a cons cell. */ | |
700ea809 | 119 | |
0c3debbc | 120 | Lisp_Object |
e96179b3 | 121 | get_doc_string (filepos, unibyte, definition) |
700ea809 | 122 | Lisp_Object filepos; |
e96179b3 | 123 | int unibyte, definition; |
778d47c7 | 124 | { |
700ea809 | 125 | char *from, *to; |
778d47c7 RS |
126 | register int fd; |
127 | register char *name; | |
128 | register char *p, *p1; | |
778d47c7 | 129 | int minsize; |
0fded513 | 130 | int offset, position; |
700ea809 | 131 | Lisp_Object file, tem; |
778d47c7 | 132 | |
700ea809 RS |
133 | if (INTEGERP (filepos)) |
134 | { | |
135 | file = Vdoc_file_name; | |
136 | position = XINT (filepos); | |
137 | } | |
138 | else if (CONSP (filepos)) | |
139 | { | |
03699b14 KR |
140 | file = XCAR (filepos); |
141 | position = XINT (XCDR (filepos)); | |
700ea809 RS |
142 | } |
143 | else | |
778d47c7 RS |
144 | return Qnil; |
145 | ||
87afdd65 SM |
146 | if (position < 0) |
147 | position = - position; | |
148 | ||
700ea809 RS |
149 | if (!STRINGP (Vdoc_directory)) |
150 | return Qnil; | |
151 | ||
152 | if (!STRINGP (file)) | |
153 | return Qnil; | |
154 | ||
155 | /* Put the file name in NAME as a C string. | |
156 | If it is relative, combine it with Vdoc_directory. */ | |
157 | ||
158 | tem = Ffile_name_absolute_p (file); | |
159 | if (NILP (tem)) | |
160 | { | |
161 | minsize = XSTRING (Vdoc_directory)->size; | |
162 | /* sizeof ("../etc/") == 8 */ | |
163 | if (minsize < 8) | |
164 | minsize = 8; | |
165 | name = (char *) alloca (minsize + XSTRING (file)->size + 8); | |
166 | strcpy (name, XSTRING (Vdoc_directory)->data); | |
167 | strcat (name, XSTRING (file)->data); | |
168 | munge_doc_file_name (name); | |
169 | } | |
170 | else | |
171 | { | |
a039f534 | 172 | name = (char *) XSTRING (file)->data; |
700ea809 | 173 | } |
c6045832 | 174 | |
68c45bf0 | 175 | fd = emacs_open (name, O_RDONLY, 0); |
c6045832 | 176 | if (fd < 0) |
778d47c7 RS |
177 | { |
178 | #ifndef CANNOT_DUMP | |
179 | if (!NILP (Vpurify_flag)) | |
180 | { | |
181 | /* Preparing to dump; DOC file is probably not installed. | |
182 | So check in ../etc. */ | |
183 | strcpy (name, "../etc/"); | |
700ea809 | 184 | strcat (name, XSTRING (file)->data); |
778d47c7 RS |
185 | munge_doc_file_name (name); |
186 | ||
68c45bf0 | 187 | fd = emacs_open (name, O_RDONLY, 0); |
778d47c7 RS |
188 | } |
189 | #endif | |
778d47c7 RS |
190 | if (fd < 0) |
191 | error ("Cannot open doc string file \"%s\"", name); | |
192 | } | |
193 | ||
0fded513 | 194 | /* Seek only to beginning of disk block. */ |
a154a4ef SM |
195 | /* Make sure we read at least 1024 bytes before `position' |
196 | so we can check the leading text for consistency. */ | |
197 | offset = min (position, max (1024, position % (8 * 1024))); | |
0fded513 | 198 | if (0 > lseek (fd, position - offset, 0)) |
c6045832 | 199 | { |
68c45bf0 | 200 | emacs_close (fd); |
c6045832 | 201 | error ("Position %ld out of range in doc string file \"%s\"", |
700ea809 | 202 | position, name); |
c6045832 | 203 | } |
700ea809 | 204 | |
912e8480 RS |
205 | /* Read the doc string into get_doc_string_buffer. |
206 | P points beyond the data just read. */ | |
0fded513 | 207 | |
912e8480 | 208 | p = get_doc_string_buffer; |
700ea809 | 209 | while (1) |
c6045832 | 210 | { |
912e8480 RS |
211 | int space_left = (get_doc_string_buffer_size |
212 | - (p - get_doc_string_buffer)); | |
700ea809 RS |
213 | int nread; |
214 | ||
0fded513 | 215 | /* Allocate or grow the buffer if we need to. */ |
700ea809 RS |
216 | if (space_left == 0) |
217 | { | |
912e8480 RS |
218 | int in_buffer = p - get_doc_string_buffer; |
219 | get_doc_string_buffer_size += 16 * 1024; | |
220 | get_doc_string_buffer | |
221 | = (char *) xrealloc (get_doc_string_buffer, | |
222 | get_doc_string_buffer_size + 1); | |
223 | p = get_doc_string_buffer + in_buffer; | |
224 | space_left = (get_doc_string_buffer_size | |
225 | - (p - get_doc_string_buffer)); | |
700ea809 RS |
226 | } |
227 | ||
0fded513 RS |
228 | /* Read a disk block at a time. |
229 | If we read the same block last time, maybe skip this? */ | |
700ea809 RS |
230 | if (space_left > 1024 * 8) |
231 | space_left = 1024 * 8; | |
68c45bf0 | 232 | nread = emacs_read (fd, p, space_left); |
700ea809 RS |
233 | if (nread < 0) |
234 | { | |
68c45bf0 | 235 | emacs_close (fd); |
700ea809 RS |
236 | error ("Read error on documentation file"); |
237 | } | |
238 | p[nread] = 0; | |
239 | if (!nread) | |
c6045832 | 240 | break; |
912e8480 | 241 | if (p == get_doc_string_buffer) |
a847af86 | 242 | p1 = (char *) index (p + offset, '\037'); |
0fded513 | 243 | else |
a847af86 | 244 | p1 = (char *) index (p, '\037'); |
c6045832 JB |
245 | if (p1) |
246 | { | |
247 | *p1 = 0; | |
248 | p = p1; | |
249 | break; | |
250 | } | |
700ea809 | 251 | p += nread; |
c6045832 | 252 | } |
68c45bf0 | 253 | emacs_close (fd); |
700ea809 | 254 | |
a154a4ef SM |
255 | /* Sanity checking. */ |
256 | if (CONSP (filepos)) | |
257 | { | |
258 | int test = 1; | |
259 | if (get_doc_string_buffer[offset - test++] != ' ') | |
260 | return Qnil; | |
261 | while (get_doc_string_buffer[offset - test] >= '0' | |
262 | && get_doc_string_buffer[offset - test] <= '9') | |
263 | test++; | |
264 | if (get_doc_string_buffer[offset - test++] != '@' | |
265 | || get_doc_string_buffer[offset - test] != '#') | |
266 | return Qnil; | |
267 | } | |
268 | else | |
269 | { | |
270 | int test = 1; | |
271 | if (get_doc_string_buffer[offset - test++] != '\n') | |
272 | return Qnil; | |
273 | while (get_doc_string_buffer[offset - test] > ' ') | |
274 | test++; | |
275 | if (get_doc_string_buffer[offset - test] != '\037') | |
276 | return Qnil; | |
277 | } | |
278 | ||
700ea809 RS |
279 | /* Scan the text and perform quoting with ^A (char code 1). |
280 | ^A^A becomes ^A, ^A0 becomes a null char, and ^A_ becomes a ^_. */ | |
912e8480 RS |
281 | from = get_doc_string_buffer + offset; |
282 | to = get_doc_string_buffer + offset; | |
700ea809 RS |
283 | while (from != p) |
284 | { | |
285 | if (*from == 1) | |
286 | { | |
287 | int c; | |
288 | ||
289 | from++; | |
290 | c = *from++; | |
291 | if (c == 1) | |
292 | *to++ = c; | |
293 | else if (c == '0') | |
294 | *to++ = 0; | |
295 | else if (c == '_') | |
296 | *to++ = 037; | |
297 | else | |
298 | error ("Invalid data in documentation file -- ^A followed by code 0%o", c); | |
299 | } | |
300 | else | |
301 | *to++ = *from++; | |
302 | } | |
303 | ||
32caae30 RS |
304 | /* If DEFINITION, read from this buffer |
305 | the same way we would read bytes from a file. */ | |
f1df0d67 RS |
306 | if (definition) |
307 | { | |
32caae30 RS |
308 | read_bytecode_pointer = get_doc_string_buffer + offset; |
309 | return Fread (Qlambda); | |
f1df0d67 RS |
310 | } |
311 | ||
e96179b3 RS |
312 | if (unibyte) |
313 | return make_unibyte_string (get_doc_string_buffer + offset, | |
314 | to - (get_doc_string_buffer + offset)); | |
315 | else | |
fb2fdea7 RS |
316 | { |
317 | /* Let the data determine whether the string is multibyte, | |
318 | even if Emacs is running in --unibyte mode. */ | |
319 | int nchars = multibyte_chars_in_text (get_doc_string_buffer + offset, | |
320 | to - (get_doc_string_buffer + offset)); | |
321 | return make_string_from_bytes (get_doc_string_buffer + offset, | |
322 | nchars, | |
323 | to - (get_doc_string_buffer + offset)); | |
324 | } | |
700ea809 RS |
325 | } |
326 | ||
327 | /* Get a string from position FILEPOS and pass it through the Lisp reader. | |
328 | We use this for fetching the bytecode string and constants vector | |
329 | of a compiled function from the .elc file. */ | |
330 | ||
331 | Lisp_Object | |
332 | read_doc_string (filepos) | |
333 | Lisp_Object filepos; | |
334 | { | |
e96179b3 | 335 | return get_doc_string (filepos, 0, 1); |
c6045832 JB |
336 | } |
337 | ||
e5aa79fa | 338 | static int |
a154a4ef | 339 | reread_doc_file (file) |
04fb8283 | 340 | Lisp_Object file; |
a154a4ef SM |
341 | { |
342 | Lisp_Object reply, prompt[3]; | |
343 | struct gcpro gcpro1; | |
344 | GCPRO1 (file); | |
345 | prompt[0] = build_string ("File "); | |
346 | prompt[1] = NILP (file) ? Vdoc_file_name : file; | |
347 | prompt[2] = build_string (" is out-of-sync. Reload? "); | |
348 | reply = Fy_or_n_p (Fconcat (3, prompt)); | |
349 | UNGCPRO; | |
350 | if (NILP (reply)) | |
e5aa79fa | 351 | return 0; |
a154a4ef SM |
352 | |
353 | if (NILP (file)) | |
354 | Fsnarf_documentation (Vdoc_file_name); | |
355 | else | |
356 | Fload (file, Qt, Qt, Qt, Qnil); | |
e5aa79fa SM |
357 | |
358 | return 1; | |
a154a4ef SM |
359 | } |
360 | ||
ee04dc54 | 361 | DEFUN ("documentation", Fdocumentation, Sdocumentation, 1, 2, 0, |
335c5470 PJ |
362 | doc: /* Return the documentation string of FUNCTION. |
363 | Unless a non-nil second argument RAW is given, the | |
364 | string is passed through `substitute-command-keys'. */) | |
365 | (function, raw) | |
502ddf23 | 366 | Lisp_Object function, raw; |
c6045832 JB |
367 | { |
368 | Lisp_Object fun; | |
369 | Lisp_Object funcar; | |
ee04dc54 | 370 | Lisp_Object tem, doc; |
e5aa79fa SM |
371 | int try_reload = 1; |
372 | ||
373 | documentation: | |
c6045832 | 374 | |
8d17fe0b GM |
375 | doc = Qnil; |
376 | ||
9191c8ae GM |
377 | if (SYMBOLP (function) |
378 | && (tem = Fget (function, Qfunction_documentation), | |
379 | !NILP (tem))) | |
380 | return Fdocumentation_property (function, Qfunction_documentation, raw); | |
381 | ||
502ddf23 | 382 | fun = Findirect_function (function); |
5b5f6883 | 383 | if (SUBRP (fun)) |
c6045832 | 384 | { |
9191c8ae GM |
385 | if (XSUBR (fun)->doc == 0) |
386 | return Qnil; | |
387 | else if ((EMACS_INT) XSUBR (fun)->doc >= 0) | |
ee04dc54 | 388 | doc = build_string (XSUBR (fun)->doc); |
c6045832 | 389 | else |
87afdd65 | 390 | doc = make_number ((EMACS_INT) XSUBR (fun)->doc); |
5b5f6883 KH |
391 | } |
392 | else if (COMPILEDP (fun)) | |
393 | { | |
87afdd65 | 394 | if ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) <= COMPILED_DOC_STRING) |
c6045832 | 395 | return Qnil; |
87afdd65 | 396 | tem = AREF (fun, COMPILED_DOC_STRING); |
e6d12642 | 397 | if (STRINGP (tem)) |
ee04dc54 | 398 | doc = tem; |
700ea809 | 399 | else if (NATNUMP (tem) || CONSP (tem)) |
87afdd65 | 400 | doc = tem; |
ee04dc54 RM |
401 | else |
402 | return Qnil; | |
5b5f6883 KH |
403 | } |
404 | else if (STRINGP (fun) || VECTORP (fun)) | |
405 | { | |
c6045832 | 406 | return build_string ("Keyboard macro."); |
5b5f6883 KH |
407 | } |
408 | else if (CONSP (fun)) | |
409 | { | |
c6045832 | 410 | funcar = Fcar (fun); |
e6d12642 | 411 | if (!SYMBOLP (funcar)) |
c6045832 | 412 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
502ddf23 | 413 | else if (EQ (funcar, Qkeymap)) |
a3cec380 | 414 | return build_string ("Prefix command (definition is a keymap associating keystrokes with commands)."); |
502ddf23 JB |
415 | else if (EQ (funcar, Qlambda) |
416 | || EQ (funcar, Qautoload)) | |
c6045832 | 417 | { |
ae44f7a4 RS |
418 | Lisp_Object tem1; |
419 | tem1 = Fcdr (Fcdr (fun)); | |
420 | tem = Fcar (tem1); | |
e6d12642 | 421 | if (STRINGP (tem)) |
ee04dc54 | 422 | doc = tem; |
ae44f7a4 RS |
423 | /* Handle a doc reference--but these never come last |
424 | in the function body, so reject them if they are last. */ | |
87afdd65 SM |
425 | else if ((NATNUMP (tem) || (CONSP (tem) && INTEGERP (XCDR (tem)))) |
426 | && !NILP (XCDR (tem1))) | |
427 | doc = tem; | |
ee04dc54 RM |
428 | else |
429 | return Qnil; | |
c6045832 | 430 | } |
502ddf23 | 431 | else if (EQ (funcar, Qmacro)) |
ee04dc54 | 432 | return Fdocumentation (Fcdr (fun), raw); |
5b5f6883 KH |
433 | else |
434 | goto oops; | |
435 | } | |
436 | else | |
437 | { | |
438 | oops: | |
439 | Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
c6045832 | 440 | } |
ee04dc54 | 441 | |
e5aa79fa SM |
442 | /* If DOC is 0, it's typically because of a dumped file missing |
443 | from the DOC file (bug in src/Makefile.in). */ | |
71cdb109 SM |
444 | if (EQ (doc, make_number (0))) |
445 | doc = Qnil; | |
68d8a8e1 | 446 | if (INTEGERP (doc) || CONSP (doc)) |
a154a4ef SM |
447 | { |
448 | Lisp_Object tem; | |
449 | tem = get_doc_string (doc, 0, 0); | |
e5aa79fa | 450 | if (NILP (tem) && try_reload) |
a154a4ef SM |
451 | { |
452 | /* The file is newer, we need to reset the pointers. */ | |
453 | struct gcpro gcpro1, gcpro2; | |
454 | GCPRO2 (function, raw); | |
e5aa79fa | 455 | try_reload = reread_doc_file (Fcar_safe (doc)); |
a154a4ef | 456 | UNGCPRO; |
e5aa79fa SM |
457 | if (try_reload) |
458 | { | |
459 | try_reload = 0; | |
460 | goto documentation; | |
461 | } | |
a154a4ef SM |
462 | } |
463 | else | |
464 | doc = tem; | |
465 | } | |
87afdd65 | 466 | |
956ace37 | 467 | if (NILP (raw)) |
441d75e5 | 468 | doc = Fsubstitute_command_keys (doc); |
ee04dc54 | 469 | return doc; |
c6045832 JB |
470 | } |
471 | ||
f6ee1260 GM |
472 | DEFUN ("documentation-property", Fdocumentation_property, |
473 | Sdocumentation_property, 2, 3, 0, | |
335c5470 PJ |
474 | doc: /* Return the documentation string that is SYMBOL's PROP property. |
475 | Third argument RAW omitted or nil means pass the result through | |
476 | `substitute-command-keys' if it is a string. | |
477 | ||
478 | This differs from `get' in that it can refer to strings stored in the | |
479 | `etc/DOC' file; and that it evaluates documentation properties that | |
480 | aren't strings. */) | |
4acb738e EN |
481 | (symbol, prop, raw) |
482 | Lisp_Object symbol, prop, raw; | |
c6045832 | 483 | { |
e5aa79fa | 484 | int try_reload = 1; |
2f0b74ea | 485 | Lisp_Object tem; |
c6045832 | 486 | |
e5aa79fa SM |
487 | documentation_property: |
488 | ||
4acb738e | 489 | tem = Fget (symbol, prop); |
44766095 | 490 | if (EQ (tem, make_number (0))) |
71cdb109 | 491 | tem = Qnil; |
68d8a8e1 | 492 | if (INTEGERP (tem) || (CONSP (tem) && INTEGERP (XCDR (tem)))) |
a154a4ef SM |
493 | { |
494 | Lisp_Object doc = tem; | |
495 | tem = get_doc_string (tem, 0, 0); | |
e5aa79fa | 496 | if (NILP (tem) && try_reload) |
a154a4ef SM |
497 | { |
498 | /* The file is newer, we need to reset the pointers. */ | |
499 | struct gcpro gcpro1, gcpro2, gcpro3; | |
500 | GCPRO3 (symbol, prop, raw); | |
e5aa79fa | 501 | try_reload = reread_doc_file (Fcar_safe (doc)); |
a154a4ef | 502 | UNGCPRO; |
e5aa79fa SM |
503 | if (try_reload) |
504 | { | |
505 | try_reload = 0; | |
506 | goto documentation_property; | |
507 | } | |
a154a4ef SM |
508 | } |
509 | } | |
f6ee1260 GM |
510 | else if (!STRINGP (tem)) |
511 | /* Feval protects its argument. */ | |
512 | tem = Feval (tem); | |
513 | ||
e6d12642 | 514 | if (NILP (raw) && STRINGP (tem)) |
bbd7d5d3 | 515 | tem = Fsubstitute_command_keys (tem); |
992d176e | 516 | return tem; |
c6045832 JB |
517 | } |
518 | \f | |
283e1184 JB |
519 | /* Scanning the DOC files and placing docstring offsets into functions. */ |
520 | ||
521 | static void | |
522 | store_function_docstring (fun, offset) | |
523 | Lisp_Object fun; | |
e343d389 RS |
524 | /* Use EMACS_INT because we get this from pointer subtraction. */ |
525 | EMACS_INT offset; | |
283e1184 JB |
526 | { |
527 | fun = indirect_function (fun); | |
528 | ||
529 | /* The type determines where the docstring is stored. */ | |
530 | ||
531 | /* Lisp_Subrs have a slot for it. */ | |
e6d12642 | 532 | if (SUBRP (fun)) |
283e1184 JB |
533 | XSUBR (fun)->doc = (char *) - offset; |
534 | ||
535 | /* If it's a lisp form, stick it in the form. */ | |
536 | else if (CONSP (fun)) | |
537 | { | |
538 | Lisp_Object tem; | |
539 | ||
03699b14 | 540 | tem = XCAR (fun); |
283e1184 JB |
541 | if (EQ (tem, Qlambda) || EQ (tem, Qautoload)) |
542 | { | |
543 | tem = Fcdr (Fcdr (fun)); | |
03699b14 | 544 | if (CONSP (tem) && INTEGERP (XCAR (tem))) |
f3fbd155 | 545 | XSETCARFASTINT (tem, offset); |
283e1184 JB |
546 | } |
547 | else if (EQ (tem, Qmacro)) | |
03699b14 | 548 | store_function_docstring (XCDR (fun), offset); |
283e1184 JB |
549 | } |
550 | ||
551 | /* Bytecode objects sometimes have slots for it. */ | |
e6d12642 | 552 | else if (COMPILEDP (fun)) |
283e1184 JB |
553 | { |
554 | /* This bytecode object must have a slot for the | |
555 | docstring, since we've found a docstring for it. */ | |
87afdd65 SM |
556 | if ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_DOC_STRING) |
557 | XSETFASTINT (AREF (fun, COMPILED_DOC_STRING), offset); | |
283e1184 JB |
558 | } |
559 | } | |
560 | ||
561 | ||
c6045832 | 562 | DEFUN ("Snarf-documentation", Fsnarf_documentation, Ssnarf_documentation, |
335c5470 | 563 | 1, 1, 0, |
f4e25f94 RS |
564 | doc: /* Used during Emacs initialization to scan the `etc/DOC...' file. |
565 | This searches the `etc/DOC...' file for doc strings and | |
566 | records them in function and variable definitions. | |
567 | The function takes one argument, FILENAME, a string; | |
568 | it specifies the file name (without a directory) of the DOC file. | |
569 | That file is found in `../etc' now; later, when the dumped Emacs is run, | |
570 | the same file name is found in the `data-directory'. */) | |
335c5470 | 571 | (filename) |
c6045832 JB |
572 | Lisp_Object filename; |
573 | { | |
574 | int fd; | |
575 | char buf[1024 + 1]; | |
576 | register int filled; | |
577 | register int pos; | |
578 | register char *p, *end; | |
24109c98 | 579 | Lisp_Object sym; |
c6045832 | 580 | char *name; |
c6045832 | 581 | |
b7826503 | 582 | CHECK_STRING (filename); |
c6045832 | 583 | |
a154a4ef | 584 | if |
c6045832 | 585 | #ifndef CANNOT_DUMP |
a154a4ef | 586 | (!NILP (Vpurify_flag)) |
c6045832 | 587 | #else /* CANNOT_DUMP */ |
a154a4ef | 588 | (0) |
c6045832 | 589 | #endif /* CANNOT_DUMP */ |
a154a4ef SM |
590 | { |
591 | name = (char *) alloca (XSTRING (filename)->size + 14); | |
592 | strcpy (name, "../etc/"); | |
593 | } | |
594 | else | |
595 | { | |
596 | CHECK_STRING (Vdoc_directory); | |
597 | name = (char *) alloca (XSTRING (filename)->size | |
598 | + XSTRING (Vdoc_directory)->size + 1); | |
599 | strcpy (name, XSTRING (Vdoc_directory)->data); | |
600 | } | |
c6045832 JB |
601 | strcat (name, XSTRING (filename)->data); /*** Add this line ***/ |
602 | #ifdef VMS | |
603 | #ifndef VMS4_4 | |
604 | /* For VMS versions with limited file name syntax, | |
605 | convert the name to something VMS will allow. */ | |
606 | p = name; | |
607 | while (*p) | |
608 | { | |
609 | if (*p == '-') | |
610 | *p = '_'; | |
611 | p++; | |
612 | } | |
613 | #endif /* not VMS4_4 */ | |
614 | #ifdef VMS4_4 | |
615 | strcpy (name, sys_translate_unix (name)); | |
616 | #endif /* VMS4_4 */ | |
617 | #endif /* VMS */ | |
618 | ||
68c45bf0 | 619 | fd = emacs_open (name, O_RDONLY, 0); |
c6045832 JB |
620 | if (fd < 0) |
621 | report_file_error ("Opening doc string file", | |
622 | Fcons (build_string (name), Qnil)); | |
623 | Vdoc_file_name = filename; | |
624 | filled = 0; | |
625 | pos = 0; | |
626 | while (1) | |
627 | { | |
628 | if (filled < 512) | |
68c45bf0 | 629 | filled += emacs_read (fd, &buf[filled], sizeof buf - 1 - filled); |
c6045832 JB |
630 | if (!filled) |
631 | break; | |
632 | ||
633 | buf[filled] = 0; | |
634 | p = buf; | |
635 | end = buf + (filled < 512 ? filled : filled - 128); | |
636 | while (p != end && *p != '\037') p++; | |
637 | /* p points to ^_Ffunctionname\n or ^_Vvarname\n. */ | |
638 | if (p != end) | |
639 | { | |
a847af86 | 640 | end = (char *) index (p, '\n'); |
141199d1 RS |
641 | sym = oblookup (Vobarray, p + 2, |
642 | multibyte_chars_in_text (p + 2, end - p - 2), | |
643 | end - p - 2); | |
e6d12642 | 644 | if (SYMBOLP (sym)) |
c6045832 JB |
645 | { |
646 | /* Attach a docstring to a variable? */ | |
647 | if (p[1] == 'V') | |
648 | { | |
649 | /* Install file-position as variable-documentation property | |
650 | and make it negative for a user-variable | |
651 | (doc starts with a `*'). */ | |
652 | Fput (sym, Qvariable_documentation, | |
653 | make_number ((pos + end + 1 - buf) | |
654 | * (end[1] == '*' ? -1 : 1))); | |
655 | } | |
656 | ||
283e1184 | 657 | /* Attach a docstring to a function? */ |
c6045832 | 658 | else if (p[1] == 'F') |
283e1184 JB |
659 | store_function_docstring (sym, pos + end + 1 - buf); |
660 | ||
661 | else | |
662 | error ("DOC file invalid at position %d", pos); | |
c6045832 JB |
663 | } |
664 | } | |
665 | pos += end - buf; | |
666 | filled -= end - buf; | |
667 | bcopy (end, buf, filled); | |
668 | } | |
68c45bf0 | 669 | emacs_close (fd); |
c6045832 JB |
670 | return Qnil; |
671 | } | |
672 | \f | |
673 | DEFUN ("substitute-command-keys", Fsubstitute_command_keys, | |
335c5470 PJ |
674 | Ssubstitute_command_keys, 1, 1, 0, |
675 | doc: /* Substitute key descriptions for command names in STRING. | |
676 | Return a new string which is STRING with substrings of the form \\=\\[COMMAND] | |
677 | replaced by either: a keystroke sequence that will invoke COMMAND, | |
678 | or "M-x COMMAND" if COMMAND is not on any keys. | |
679 | Substrings of the form \\=\\{MAPVAR} are replaced by summaries | |
680 | \(made by describe-bindings) of the value of MAPVAR, taken as a keymap. | |
681 | Substrings of the form \\=\\<MAPVAR> specify to use the value of MAPVAR | |
682 | as the keymap for future \\=\\[COMMAND] substrings. | |
683 | \\=\\= quotes the following character and is discarded; | |
684 | thus, \\=\\=\\=\\= puts \\=\\= into the output, and \\=\\=\\=\\[ puts \\=\\[ into the output. */) | |
685 | (string) | |
4acb738e | 686 | Lisp_Object string; |
c6045832 JB |
687 | { |
688 | unsigned char *buf; | |
689 | int changed = 0; | |
690 | register unsigned char *strp; | |
691 | register unsigned char *bufp; | |
692 | int idx; | |
693 | int bsize; | |
665d3046 | 694 | Lisp_Object tem; |
c6045832 JB |
695 | Lisp_Object keymap; |
696 | unsigned char *start; | |
2d0aa229 | 697 | int length, length_byte; |
665d3046 JB |
698 | Lisp_Object name; |
699 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
141199d1 RS |
700 | int multibyte; |
701 | int nchars; | |
c6045832 | 702 | |
4acb738e | 703 | if (NILP (string)) |
c6045832 JB |
704 | return Qnil; |
705 | ||
b7826503 | 706 | CHECK_STRING (string); |
665d3046 JB |
707 | tem = Qnil; |
708 | keymap = Qnil; | |
709 | name = Qnil; | |
4acb738e | 710 | GCPRO4 (string, tem, keymap, name); |
c6045832 | 711 | |
141199d1 RS |
712 | multibyte = STRING_MULTIBYTE (string); |
713 | nchars = 0; | |
714 | ||
9a425dcb RS |
715 | /* KEYMAP is either nil (which means search all the active keymaps) |
716 | or a specified local map (which means search just that and the | |
717 | global map). If non-nil, it might come from Voverriding_local_map, | |
4acb738e | 718 | or from a \\<mapname> construct in STRING itself.. */ |
f73d1163 KH |
719 | keymap = current_kboard->Voverriding_terminal_local_map; |
720 | if (NILP (keymap)) | |
721 | keymap = Voverriding_local_map; | |
c6045832 | 722 | |
fc932ac6 | 723 | bsize = STRING_BYTES (XSTRING (string)); |
c6045832 JB |
724 | bufp = buf = (unsigned char *) xmalloc (bsize); |
725 | ||
4acb738e | 726 | strp = (unsigned char *) XSTRING (string)->data; |
fc932ac6 | 727 | while (strp < XSTRING (string)->data + STRING_BYTES (XSTRING (string))) |
c6045832 JB |
728 | { |
729 | if (strp[0] == '\\' && strp[1] == '=') | |
730 | { | |
731 | /* \= quotes the next character; | |
732 | thus, to put in \[ without its special meaning, use \=\[. */ | |
733 | changed = 1; | |
141199d1 RS |
734 | strp += 2; |
735 | if (multibyte) | |
736 | { | |
737 | int len; | |
fc932ac6 | 738 | int maxlen = XSTRING (string)->data + STRING_BYTES (XSTRING (string)) - strp; |
141199d1 RS |
739 | |
740 | STRING_CHAR_AND_LENGTH (strp, maxlen, len); | |
741 | if (len == 1) | |
742 | *bufp = *strp; | |
743 | else | |
744 | bcopy (strp, bufp, len); | |
745 | strp += len; | |
746 | bufp += len; | |
747 | nchars++; | |
748 | } | |
749 | else | |
750 | *bufp++ = *strp++, nchars++; | |
c6045832 JB |
751 | } |
752 | else if (strp[0] == '\\' && strp[1] == '[') | |
753 | { | |
b6c53774 | 754 | Lisp_Object firstkey; |
11f9d6e1 | 755 | int start_idx; |
b6c53774 | 756 | |
c6045832 JB |
757 | changed = 1; |
758 | strp += 2; /* skip \[ */ | |
759 | start = strp; | |
11f9d6e1 | 760 | start_idx = start - XSTRING (string)->data; |
c6045832 | 761 | |
4acb738e | 762 | while ((strp - (unsigned char *) XSTRING (string)->data |
fc932ac6 | 763 | < STRING_BYTES (XSTRING (string))) |
c6045832 JB |
764 | && *strp != ']') |
765 | strp++; | |
141199d1 RS |
766 | length_byte = strp - start; |
767 | ||
c6045832 JB |
768 | strp++; /* skip ] */ |
769 | ||
770 | /* Save STRP in IDX. */ | |
4acb738e | 771 | idx = strp - (unsigned char *) XSTRING (string)->data; |
141199d1 | 772 | tem = Fintern (make_string (start, length_byte), Qnil); |
11f9d6e1 GM |
773 | |
774 | /* Note the Fwhere_is_internal can GC, so we have to take | |
775 | relocation of string contents into account. */ | |
4857ef58 | 776 | tem = Fwhere_is_internal (tem, keymap, Qt, Qnil, Qnil); |
11f9d6e1 GM |
777 | strp = XSTRING (string)->data + idx; |
778 | start = XSTRING (string)->data + start_idx; | |
c6045832 | 779 | |
b6c53774 RS |
780 | /* Disregard menu bar bindings; it is positively annoying to |
781 | mention them when there's no menu bar, and it isn't terribly | |
782 | useful even when there is a menu bar. */ | |
ef586bbd RS |
783 | if (!NILP (tem)) |
784 | { | |
785 | firstkey = Faref (tem, make_number (0)); | |
786 | if (EQ (firstkey, Qmenu_bar)) | |
787 | tem = Qnil; | |
788 | } | |
b6c53774 | 789 | |
265a9e55 | 790 | if (NILP (tem)) /* but not on any keys */ |
c6045832 | 791 | { |
8d17fe0b GM |
792 | int offset = bufp - buf; |
793 | buf = (unsigned char *) xrealloc (buf, bsize += 4); | |
794 | bufp = buf + offset; | |
c6045832 JB |
795 | bcopy ("M-x ", bufp, 4); |
796 | bufp += 4; | |
141199d1 RS |
797 | nchars += 4; |
798 | if (multibyte) | |
799 | length = multibyte_chars_in_text (start, length_byte); | |
800 | else | |
801 | length = length_byte; | |
c6045832 JB |
802 | goto subst; |
803 | } | |
804 | else | |
805 | { /* function is on a key */ | |
806 | tem = Fkey_description (tem); | |
807 | goto subst_string; | |
808 | } | |
809 | } | |
810 | /* \{foo} is replaced with a summary of the keymap (symbol-value foo). | |
811 | \<foo> just sets the keymap used for \[cmd]. */ | |
812 | else if (strp[0] == '\\' && (strp[1] == '{' || strp[1] == '<')) | |
813 | { | |
814 | struct buffer *oldbuf; | |
11f9d6e1 | 815 | int start_idx; |
c6045832 JB |
816 | |
817 | changed = 1; | |
818 | strp += 2; /* skip \{ or \< */ | |
819 | start = strp; | |
11f9d6e1 | 820 | start_idx = start - XSTRING (string)->data; |
c6045832 | 821 | |
4acb738e EN |
822 | while ((strp - (unsigned char *) XSTRING (string)->data |
823 | < XSTRING (string)->size) | |
c6045832 JB |
824 | && *strp != '}' && *strp != '>') |
825 | strp++; | |
141199d1 RS |
826 | |
827 | length_byte = strp - start; | |
c6045832 JB |
828 | strp++; /* skip } or > */ |
829 | ||
830 | /* Save STRP in IDX. */ | |
4acb738e | 831 | idx = strp - (unsigned char *) XSTRING (string)->data; |
c6045832 JB |
832 | |
833 | /* Get the value of the keymap in TEM, or nil if undefined. | |
834 | Do this while still in the user's current buffer | |
835 | in case it is a local variable. */ | |
141199d1 | 836 | name = Fintern (make_string (start, length_byte), Qnil); |
c6045832 | 837 | tem = Fboundp (name); |
265a9e55 | 838 | if (! NILP (tem)) |
c6045832 JB |
839 | { |
840 | tem = Fsymbol_value (name); | |
265a9e55 | 841 | if (! NILP (tem)) |
11f9d6e1 | 842 | { |
02067692 SM |
843 | tem = get_keymap (tem, 0, 1); |
844 | /* Note that get_keymap can GC. */ | |
11f9d6e1 GM |
845 | strp = XSTRING (string)->data + idx; |
846 | start = XSTRING (string)->data + start_idx; | |
847 | } | |
c6045832 JB |
848 | } |
849 | ||
850 | /* Now switch to a temp buffer. */ | |
851 | oldbuf = current_buffer; | |
852 | set_buffer_internal (XBUFFER (Vprin1_to_string_buffer)); | |
853 | ||
265a9e55 | 854 | if (NILP (tem)) |
c6045832 JB |
855 | { |
856 | name = Fsymbol_name (name); | |
857 | insert_string ("\nUses keymap \""); | |
141199d1 RS |
858 | insert_from_string (name, 0, 0, |
859 | XSTRING (name)->size, | |
fc932ac6 | 860 | STRING_BYTES (XSTRING (name)), 1); |
c6045832 JB |
861 | insert_string ("\", which is not currently defined.\n"); |
862 | if (start[-1] == '<') keymap = Qnil; | |
863 | } | |
864 | else if (start[-1] == '<') | |
865 | keymap = tem; | |
866 | else | |
7523d17c | 867 | describe_map_tree (tem, 1, Qnil, Qnil, (char *)0, 1, 0, 0); |
c6045832 JB |
868 | tem = Fbuffer_string (); |
869 | Ferase_buffer (); | |
870 | set_buffer_internal (oldbuf); | |
871 | ||
872 | subst_string: | |
873 | start = XSTRING (tem)->data; | |
874 | length = XSTRING (tem)->size; | |
fc932ac6 | 875 | length_byte = STRING_BYTES (XSTRING (tem)); |
c6045832 | 876 | subst: |
8d17fe0b GM |
877 | { |
878 | int offset = bufp - buf; | |
879 | buf = (unsigned char *) xrealloc (buf, bsize += length_byte); | |
880 | bufp = buf + offset; | |
881 | bcopy (start, bufp, length_byte); | |
882 | bufp += length_byte; | |
883 | nchars += length; | |
884 | /* Check STRING again in case gc relocated it. */ | |
885 | strp = (unsigned char *) XSTRING (string)->data + idx; | |
886 | } | |
c6045832 | 887 | } |
141199d1 RS |
888 | else if (! multibyte) /* just copy other chars */ |
889 | *bufp++ = *strp++, nchars++; | |
890 | else | |
891 | { | |
892 | int len; | |
fc932ac6 | 893 | int maxlen = XSTRING (string)->data + STRING_BYTES (XSTRING (string)) - strp; |
141199d1 RS |
894 | |
895 | STRING_CHAR_AND_LENGTH (strp, maxlen, len); | |
896 | if (len == 1) | |
897 | *bufp = *strp; | |
898 | else | |
899 | bcopy (strp, bufp, len); | |
900 | strp += len; | |
901 | bufp += len; | |
902 | nchars++; | |
903 | } | |
c6045832 JB |
904 | } |
905 | ||
906 | if (changed) /* don't bother if nothing substituted */ | |
cc5bf9eb | 907 | tem = make_string_from_bytes (buf, nchars, bufp - buf); |
c6045832 | 908 | else |
4acb738e | 909 | tem = string; |
9ac0d9e0 | 910 | xfree (buf); |
665d3046 | 911 | RETURN_UNGCPRO (tem); |
c6045832 JB |
912 | } |
913 | \f | |
dfcf069d | 914 | void |
c6045832 JB |
915 | syms_of_doc () |
916 | { | |
9191c8ae GM |
917 | Qfunction_documentation = intern ("function-documentation"); |
918 | staticpro (&Qfunction_documentation); | |
919 | ||
c6045832 | 920 | DEFVAR_LISP ("internal-doc-file-name", &Vdoc_file_name, |
335c5470 | 921 | doc: /* Name of file containing documentation strings of built-in symbols. */); |
c6045832 JB |
922 | Vdoc_file_name = Qnil; |
923 | ||
924 | defsubr (&Sdocumentation); | |
925 | defsubr (&Sdocumentation_property); | |
926 | defsubr (&Ssnarf_documentation); | |
927 | defsubr (&Ssubstitute_command_keys); | |
928 | } |