| 1 | /* Record indices of function doc strings stored in a file. |
| 2 | Copyright (C) 1985, 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, |
| 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | |
| 22 | #include <config.h> |
| 23 | |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/file.h> /* Must be after sys/types.h for USG*/ |
| 26 | #include <ctype.h> |
| 27 | #include <setjmp.h> |
| 28 | |
| 29 | #ifdef HAVE_FCNTL_H |
| 30 | #include <fcntl.h> |
| 31 | #endif |
| 32 | |
| 33 | #ifdef HAVE_UNISTD_H |
| 34 | #include <unistd.h> |
| 35 | #endif |
| 36 | |
| 37 | #ifndef O_RDONLY |
| 38 | #define O_RDONLY 0 |
| 39 | #endif |
| 40 | |
| 41 | #include "lisp.h" |
| 42 | #include "buffer.h" |
| 43 | #include "keyboard.h" |
| 44 | #include "character.h" |
| 45 | #include "keymap.h" |
| 46 | #include "buildobj.h" |
| 47 | |
| 48 | #ifdef HAVE_INDEX |
| 49 | extern char *index (const char *, int); |
| 50 | #endif |
| 51 | |
| 52 | Lisp_Object Vdoc_file_name; |
| 53 | |
| 54 | Lisp_Object Qfunction_documentation; |
| 55 | |
| 56 | /* A list of files used to build this Emacs binary. */ |
| 57 | static Lisp_Object Vbuild_files; |
| 58 | |
| 59 | extern Lisp_Object Voverriding_local_map; |
| 60 | |
| 61 | extern Lisp_Object Qremap; |
| 62 | |
| 63 | /* Buffer used for reading from documentation file. */ |
| 64 | static char *get_doc_string_buffer; |
| 65 | static int get_doc_string_buffer_size; |
| 66 | |
| 67 | static unsigned char *read_bytecode_pointer; |
| 68 | Lisp_Object Fsnarf_documentation (Lisp_Object); |
| 69 | |
| 70 | /* readchar in lread.c calls back here to fetch the next byte. |
| 71 | If UNREADFLAG is 1, we unread a byte. */ |
| 72 | |
| 73 | int |
| 74 | read_bytecode_char (int unreadflag) |
| 75 | { |
| 76 | if (unreadflag) |
| 77 | { |
| 78 | read_bytecode_pointer--; |
| 79 | return 0; |
| 80 | } |
| 81 | return *read_bytecode_pointer++; |
| 82 | } |
| 83 | |
| 84 | /* Extract a doc string from a file. FILEPOS says where to get it. |
| 85 | If it is an integer, use that position in the standard DOC-... file. |
| 86 | If it is (FILE . INTEGER), use FILE as the file name |
| 87 | and INTEGER as the position in that file. |
| 88 | But if INTEGER is negative, make it positive. |
| 89 | (A negative integer is used for user variables, so we can distinguish |
| 90 | them without actually fetching the doc string.) |
| 91 | |
| 92 | If the location does not point to the beginning of a docstring |
| 93 | (e.g. because the file has been modified and the location is stale), |
| 94 | return nil. |
| 95 | |
| 96 | If UNIBYTE is nonzero, always make a unibyte string. |
| 97 | |
| 98 | If DEFINITION is nonzero, assume this is for reading |
| 99 | a dynamic function definition; convert the bytestring |
| 100 | and the constants vector with appropriate byte handling, |
| 101 | and return a cons cell. */ |
| 102 | |
| 103 | Lisp_Object |
| 104 | get_doc_string (Lisp_Object filepos, int unibyte, int definition) |
| 105 | { |
| 106 | char *from, *to; |
| 107 | register int fd; |
| 108 | register char *name; |
| 109 | register char *p, *p1; |
| 110 | int minsize; |
| 111 | int offset, position; |
| 112 | Lisp_Object file, tem; |
| 113 | |
| 114 | if (INTEGERP (filepos)) |
| 115 | { |
| 116 | file = Vdoc_file_name; |
| 117 | position = XINT (filepos); |
| 118 | } |
| 119 | else if (CONSP (filepos)) |
| 120 | { |
| 121 | file = XCAR (filepos); |
| 122 | position = XINT (XCDR (filepos)); |
| 123 | } |
| 124 | else |
| 125 | return Qnil; |
| 126 | |
| 127 | if (position < 0) |
| 128 | position = - position; |
| 129 | |
| 130 | if (!STRINGP (Vdoc_directory)) |
| 131 | return Qnil; |
| 132 | |
| 133 | if (!STRINGP (file)) |
| 134 | return Qnil; |
| 135 | |
| 136 | /* Put the file name in NAME as a C string. |
| 137 | If it is relative, combine it with Vdoc_directory. */ |
| 138 | |
| 139 | tem = Ffile_name_absolute_p (file); |
| 140 | if (NILP (tem)) |
| 141 | { |
| 142 | minsize = SCHARS (Vdoc_directory); |
| 143 | /* sizeof ("../etc/") == 8 */ |
| 144 | if (minsize < 8) |
| 145 | minsize = 8; |
| 146 | name = (char *) alloca (minsize + SCHARS (file) + 8); |
| 147 | strcpy (name, SDATA (Vdoc_directory)); |
| 148 | strcat (name, SDATA (file)); |
| 149 | } |
| 150 | else |
| 151 | { |
| 152 | name = (char *) SDATA (file); |
| 153 | } |
| 154 | |
| 155 | fd = emacs_open (name, O_RDONLY, 0); |
| 156 | if (fd < 0) |
| 157 | { |
| 158 | #ifndef CANNOT_DUMP |
| 159 | if (!NILP (Vpurify_flag)) |
| 160 | { |
| 161 | /* Preparing to dump; DOC file is probably not installed. |
| 162 | So check in ../etc. */ |
| 163 | strcpy (name, "../etc/"); |
| 164 | strcat (name, SDATA (file)); |
| 165 | |
| 166 | fd = emacs_open (name, O_RDONLY, 0); |
| 167 | } |
| 168 | #endif |
| 169 | if (fd < 0) |
| 170 | error ("Cannot open doc string file \"%s\"", name); |
| 171 | } |
| 172 | |
| 173 | /* Seek only to beginning of disk block. */ |
| 174 | /* Make sure we read at least 1024 bytes before `position' |
| 175 | so we can check the leading text for consistency. */ |
| 176 | offset = min (position, max (1024, position % (8 * 1024))); |
| 177 | if (0 > lseek (fd, position - offset, 0)) |
| 178 | { |
| 179 | emacs_close (fd); |
| 180 | error ("Position %ld out of range in doc string file \"%s\"", |
| 181 | position, name); |
| 182 | } |
| 183 | |
| 184 | /* Read the doc string into get_doc_string_buffer. |
| 185 | P points beyond the data just read. */ |
| 186 | |
| 187 | p = get_doc_string_buffer; |
| 188 | while (1) |
| 189 | { |
| 190 | int space_left = (get_doc_string_buffer_size |
| 191 | - (p - get_doc_string_buffer)); |
| 192 | int nread; |
| 193 | |
| 194 | /* Allocate or grow the buffer if we need to. */ |
| 195 | if (space_left == 0) |
| 196 | { |
| 197 | int in_buffer = p - get_doc_string_buffer; |
| 198 | get_doc_string_buffer_size += 16 * 1024; |
| 199 | get_doc_string_buffer |
| 200 | = (char *) xrealloc (get_doc_string_buffer, |
| 201 | get_doc_string_buffer_size + 1); |
| 202 | p = get_doc_string_buffer + in_buffer; |
| 203 | space_left = (get_doc_string_buffer_size |
| 204 | - (p - get_doc_string_buffer)); |
| 205 | } |
| 206 | |
| 207 | /* Read a disk block at a time. |
| 208 | If we read the same block last time, maybe skip this? */ |
| 209 | if (space_left > 1024 * 8) |
| 210 | space_left = 1024 * 8; |
| 211 | nread = emacs_read (fd, p, space_left); |
| 212 | if (nread < 0) |
| 213 | { |
| 214 | emacs_close (fd); |
| 215 | error ("Read error on documentation file"); |
| 216 | } |
| 217 | p[nread] = 0; |
| 218 | if (!nread) |
| 219 | break; |
| 220 | if (p == get_doc_string_buffer) |
| 221 | p1 = (char *) index (p + offset, '\037'); |
| 222 | else |
| 223 | p1 = (char *) index (p, '\037'); |
| 224 | if (p1) |
| 225 | { |
| 226 | *p1 = 0; |
| 227 | p = p1; |
| 228 | break; |
| 229 | } |
| 230 | p += nread; |
| 231 | } |
| 232 | emacs_close (fd); |
| 233 | |
| 234 | /* Sanity checking. */ |
| 235 | if (CONSP (filepos)) |
| 236 | { |
| 237 | int test = 1; |
| 238 | if (get_doc_string_buffer[offset - test++] != ' ') |
| 239 | return Qnil; |
| 240 | while (get_doc_string_buffer[offset - test] >= '0' |
| 241 | && get_doc_string_buffer[offset - test] <= '9') |
| 242 | test++; |
| 243 | if (get_doc_string_buffer[offset - test++] != '@' |
| 244 | || get_doc_string_buffer[offset - test] != '#') |
| 245 | return Qnil; |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | int test = 1; |
| 250 | if (get_doc_string_buffer[offset - test++] != '\n') |
| 251 | return Qnil; |
| 252 | while (get_doc_string_buffer[offset - test] > ' ') |
| 253 | test++; |
| 254 | if (get_doc_string_buffer[offset - test] != '\037') |
| 255 | return Qnil; |
| 256 | } |
| 257 | |
| 258 | /* Scan the text and perform quoting with ^A (char code 1). |
| 259 | ^A^A becomes ^A, ^A0 becomes a null char, and ^A_ becomes a ^_. */ |
| 260 | from = get_doc_string_buffer + offset; |
| 261 | to = get_doc_string_buffer + offset; |
| 262 | while (from != p) |
| 263 | { |
| 264 | if (*from == 1) |
| 265 | { |
| 266 | int c; |
| 267 | |
| 268 | from++; |
| 269 | c = *from++; |
| 270 | if (c == 1) |
| 271 | *to++ = c; |
| 272 | else if (c == '0') |
| 273 | *to++ = 0; |
| 274 | else if (c == '_') |
| 275 | *to++ = 037; |
| 276 | else |
| 277 | error ("Invalid data in documentation file -- ^A followed by code 0%o", c); |
| 278 | } |
| 279 | else |
| 280 | *to++ = *from++; |
| 281 | } |
| 282 | |
| 283 | /* If DEFINITION, read from this buffer |
| 284 | the same way we would read bytes from a file. */ |
| 285 | if (definition) |
| 286 | { |
| 287 | read_bytecode_pointer = get_doc_string_buffer + offset; |
| 288 | return Fread (Qlambda); |
| 289 | } |
| 290 | |
| 291 | if (unibyte) |
| 292 | return make_unibyte_string (get_doc_string_buffer + offset, |
| 293 | to - (get_doc_string_buffer + offset)); |
| 294 | else |
| 295 | { |
| 296 | /* Let the data determine whether the string is multibyte, |
| 297 | even if Emacs is running in --unibyte mode. */ |
| 298 | int nchars = multibyte_chars_in_text (get_doc_string_buffer + offset, |
| 299 | to - (get_doc_string_buffer + offset)); |
| 300 | return make_string_from_bytes (get_doc_string_buffer + offset, |
| 301 | nchars, |
| 302 | to - (get_doc_string_buffer + offset)); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /* Get a string from position FILEPOS and pass it through the Lisp reader. |
| 307 | We use this for fetching the bytecode string and constants vector |
| 308 | of a compiled function from the .elc file. */ |
| 309 | |
| 310 | Lisp_Object |
| 311 | read_doc_string (Lisp_Object filepos) |
| 312 | { |
| 313 | return get_doc_string (filepos, 0, 1); |
| 314 | } |
| 315 | |
| 316 | static int |
| 317 | reread_doc_file (Lisp_Object file) |
| 318 | { |
| 319 | #if 0 |
| 320 | Lisp_Object reply, prompt[3]; |
| 321 | struct gcpro gcpro1; |
| 322 | GCPRO1 (file); |
| 323 | prompt[0] = build_string ("File "); |
| 324 | prompt[1] = NILP (file) ? Vdoc_file_name : file; |
| 325 | prompt[2] = build_string (" is out of sync. Reload? "); |
| 326 | reply = Fy_or_n_p (Fconcat (3, prompt)); |
| 327 | UNGCPRO; |
| 328 | if (NILP (reply)) |
| 329 | return 0; |
| 330 | #endif |
| 331 | |
| 332 | if (NILP (file)) |
| 333 | Fsnarf_documentation (Vdoc_file_name); |
| 334 | else |
| 335 | Fload (file, Qt, Qt, Qt, Qnil); |
| 336 | |
| 337 | return 1; |
| 338 | } |
| 339 | |
| 340 | DEFUN ("documentation", Fdocumentation, Sdocumentation, 1, 2, 0, |
| 341 | doc: /* Return the documentation string of FUNCTION. |
| 342 | Unless a non-nil second argument RAW is given, the |
| 343 | string is passed through `substitute-command-keys'. */) |
| 344 | (function, raw) |
| 345 | Lisp_Object function, raw; |
| 346 | { |
| 347 | Lisp_Object fun; |
| 348 | Lisp_Object funcar; |
| 349 | Lisp_Object tem, doc; |
| 350 | int try_reload = 1; |
| 351 | |
| 352 | documentation: |
| 353 | |
| 354 | doc = Qnil; |
| 355 | |
| 356 | if (SYMBOLP (function) |
| 357 | && (tem = Fget (function, Qfunction_documentation), |
| 358 | !NILP (tem))) |
| 359 | return Fdocumentation_property (function, Qfunction_documentation, raw); |
| 360 | |
| 361 | fun = Findirect_function (function, Qnil); |
| 362 | if (SUBRP (fun)) |
| 363 | { |
| 364 | if (XSUBR (fun)->doc == 0) |
| 365 | return Qnil; |
| 366 | else if ((EMACS_INT) XSUBR (fun)->doc >= 0) |
| 367 | doc = build_string (XSUBR (fun)->doc); |
| 368 | else |
| 369 | doc = make_number ((EMACS_INT) XSUBR (fun)->doc); |
| 370 | } |
| 371 | else if (COMPILEDP (fun)) |
| 372 | { |
| 373 | if ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) <= COMPILED_DOC_STRING) |
| 374 | return Qnil; |
| 375 | tem = AREF (fun, COMPILED_DOC_STRING); |
| 376 | if (STRINGP (tem)) |
| 377 | doc = tem; |
| 378 | else if (NATNUMP (tem) || CONSP (tem)) |
| 379 | doc = tem; |
| 380 | else |
| 381 | return Qnil; |
| 382 | } |
| 383 | else if (STRINGP (fun) || VECTORP (fun)) |
| 384 | { |
| 385 | return build_string ("Keyboard macro."); |
| 386 | } |
| 387 | else if (CONSP (fun)) |
| 388 | { |
| 389 | funcar = Fcar (fun); |
| 390 | if (!SYMBOLP (funcar)) |
| 391 | xsignal1 (Qinvalid_function, fun); |
| 392 | else if (EQ (funcar, Qkeymap)) |
| 393 | return build_string ("Prefix command (definition is a keymap associating keystrokes with commands)."); |
| 394 | else if (EQ (funcar, Qlambda) |
| 395 | || EQ (funcar, Qautoload)) |
| 396 | { |
| 397 | Lisp_Object tem1; |
| 398 | tem1 = Fcdr (Fcdr (fun)); |
| 399 | tem = Fcar (tem1); |
| 400 | if (STRINGP (tem)) |
| 401 | doc = tem; |
| 402 | /* Handle a doc reference--but these never come last |
| 403 | in the function body, so reject them if they are last. */ |
| 404 | else if ((NATNUMP (tem) || (CONSP (tem) && INTEGERP (XCDR (tem)))) |
| 405 | && !NILP (XCDR (tem1))) |
| 406 | doc = tem; |
| 407 | else |
| 408 | return Qnil; |
| 409 | } |
| 410 | else if (EQ (funcar, Qmacro)) |
| 411 | return Fdocumentation (Fcdr (fun), raw); |
| 412 | else |
| 413 | goto oops; |
| 414 | } |
| 415 | else |
| 416 | { |
| 417 | oops: |
| 418 | xsignal1 (Qinvalid_function, fun); |
| 419 | } |
| 420 | |
| 421 | /* Check for an advised function. Its doc string |
| 422 | has an `ad-advice-info' text property. */ |
| 423 | if (STRINGP (doc)) |
| 424 | { |
| 425 | Lisp_Object innerfunc; |
| 426 | innerfunc = Fget_text_property (make_number (0), |
| 427 | intern ("ad-advice-info"), |
| 428 | doc); |
| 429 | if (! NILP (innerfunc)) |
| 430 | doc = call1 (intern ("ad-make-advised-docstring"), innerfunc); |
| 431 | } |
| 432 | |
| 433 | /* If DOC is 0, it's typically because of a dumped file missing |
| 434 | from the DOC file (bug in src/Makefile.in). */ |
| 435 | if (EQ (doc, make_number (0))) |
| 436 | doc = Qnil; |
| 437 | if (INTEGERP (doc) || CONSP (doc)) |
| 438 | { |
| 439 | Lisp_Object tem; |
| 440 | tem = get_doc_string (doc, 0, 0); |
| 441 | if (NILP (tem) && try_reload) |
| 442 | { |
| 443 | /* The file is newer, we need to reset the pointers. */ |
| 444 | struct gcpro gcpro1, gcpro2; |
| 445 | GCPRO2 (function, raw); |
| 446 | try_reload = reread_doc_file (Fcar_safe (doc)); |
| 447 | UNGCPRO; |
| 448 | if (try_reload) |
| 449 | { |
| 450 | try_reload = 0; |
| 451 | goto documentation; |
| 452 | } |
| 453 | } |
| 454 | else |
| 455 | doc = tem; |
| 456 | } |
| 457 | |
| 458 | if (NILP (raw)) |
| 459 | doc = Fsubstitute_command_keys (doc); |
| 460 | return doc; |
| 461 | } |
| 462 | |
| 463 | DEFUN ("documentation-property", Fdocumentation_property, |
| 464 | Sdocumentation_property, 2, 3, 0, |
| 465 | doc: /* Return the documentation string that is SYMBOL's PROP property. |
| 466 | Third argument RAW omitted or nil means pass the result through |
| 467 | `substitute-command-keys' if it is a string. |
| 468 | |
| 469 | This differs from `get' in that it can refer to strings stored in the |
| 470 | `etc/DOC' file; and that it evaluates documentation properties that |
| 471 | aren't strings. */) |
| 472 | (symbol, prop, raw) |
| 473 | Lisp_Object symbol, prop, raw; |
| 474 | { |
| 475 | int try_reload = 1; |
| 476 | Lisp_Object tem; |
| 477 | |
| 478 | documentation_property: |
| 479 | |
| 480 | tem = Fget (symbol, prop); |
| 481 | if (EQ (tem, make_number (0))) |
| 482 | tem = Qnil; |
| 483 | if (INTEGERP (tem) || (CONSP (tem) && INTEGERP (XCDR (tem)))) |
| 484 | { |
| 485 | Lisp_Object doc = tem; |
| 486 | tem = get_doc_string (tem, 0, 0); |
| 487 | if (NILP (tem) && try_reload) |
| 488 | { |
| 489 | /* The file is newer, we need to reset the pointers. */ |
| 490 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 491 | GCPRO3 (symbol, prop, raw); |
| 492 | try_reload = reread_doc_file (Fcar_safe (doc)); |
| 493 | UNGCPRO; |
| 494 | if (try_reload) |
| 495 | { |
| 496 | try_reload = 0; |
| 497 | goto documentation_property; |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | else if (!STRINGP (tem)) |
| 502 | /* Feval protects its argument. */ |
| 503 | tem = Feval (tem); |
| 504 | |
| 505 | if (NILP (raw) && STRINGP (tem)) |
| 506 | tem = Fsubstitute_command_keys (tem); |
| 507 | return tem; |
| 508 | } |
| 509 | \f |
| 510 | /* Scanning the DOC files and placing docstring offsets into functions. */ |
| 511 | |
| 512 | static void |
| 513 | store_function_docstring (Lisp_Object fun, EMACS_INT offset) |
| 514 | /* Use EMACS_INT because we get offset from pointer subtraction. */ |
| 515 | { |
| 516 | fun = indirect_function (fun); |
| 517 | |
| 518 | /* The type determines where the docstring is stored. */ |
| 519 | |
| 520 | /* Lisp_Subrs have a slot for it. */ |
| 521 | if (SUBRP (fun)) |
| 522 | XSUBR (fun)->doc = (char *) - offset; |
| 523 | |
| 524 | /* If it's a lisp form, stick it in the form. */ |
| 525 | else if (CONSP (fun)) |
| 526 | { |
| 527 | Lisp_Object tem; |
| 528 | |
| 529 | tem = XCAR (fun); |
| 530 | if (EQ (tem, Qlambda) || EQ (tem, Qautoload)) |
| 531 | { |
| 532 | tem = Fcdr (Fcdr (fun)); |
| 533 | if (CONSP (tem) && INTEGERP (XCAR (tem))) |
| 534 | XSETCAR (tem, make_number (offset)); |
| 535 | } |
| 536 | else if (EQ (tem, Qmacro)) |
| 537 | store_function_docstring (XCDR (fun), offset); |
| 538 | } |
| 539 | |
| 540 | /* Bytecode objects sometimes have slots for it. */ |
| 541 | else if (COMPILEDP (fun)) |
| 542 | { |
| 543 | /* This bytecode object must have a slot for the |
| 544 | docstring, since we've found a docstring for it. */ |
| 545 | if ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_DOC_STRING) |
| 546 | ASET (fun, COMPILED_DOC_STRING, make_number (offset)); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | static const char buildobj[] = BUILDOBJ; |
| 551 | |
| 552 | DEFUN ("Snarf-documentation", Fsnarf_documentation, Ssnarf_documentation, |
| 553 | 1, 1, 0, |
| 554 | doc: /* Used during Emacs initialization to scan the `etc/DOC...' file. |
| 555 | This searches the `etc/DOC...' file for doc strings and |
| 556 | records them in function and variable definitions. |
| 557 | The function takes one argument, FILENAME, a string; |
| 558 | it specifies the file name (without a directory) of the DOC file. |
| 559 | That file is found in `../etc' now; later, when the dumped Emacs is run, |
| 560 | the same file name is found in the `doc-directory'. */) |
| 561 | (filename) |
| 562 | Lisp_Object filename; |
| 563 | { |
| 564 | int fd; |
| 565 | char buf[1024 + 1]; |
| 566 | register int filled; |
| 567 | register int pos; |
| 568 | register char *p, *end; |
| 569 | Lisp_Object sym; |
| 570 | char *name; |
| 571 | int skip_file = 0; |
| 572 | |
| 573 | CHECK_STRING (filename); |
| 574 | |
| 575 | if |
| 576 | #ifndef CANNOT_DUMP |
| 577 | (!NILP (Vpurify_flag)) |
| 578 | #else /* CANNOT_DUMP */ |
| 579 | (0) |
| 580 | #endif /* CANNOT_DUMP */ |
| 581 | { |
| 582 | name = (char *) alloca (SCHARS (filename) + 14); |
| 583 | strcpy (name, "../etc/"); |
| 584 | } |
| 585 | else |
| 586 | { |
| 587 | CHECK_STRING (Vdoc_directory); |
| 588 | name = (char *) alloca (SCHARS (filename) |
| 589 | + SCHARS (Vdoc_directory) + 1); |
| 590 | strcpy (name, SDATA (Vdoc_directory)); |
| 591 | } |
| 592 | strcat (name, SDATA (filename)); /*** Add this line ***/ |
| 593 | |
| 594 | /* Vbuild_files is nil when temacs is run, and non-nil after that. */ |
| 595 | if (NILP (Vbuild_files)) |
| 596 | { |
| 597 | const char *beg, *end; |
| 598 | |
| 599 | for (beg = buildobj; *beg; beg = end) |
| 600 | { |
| 601 | int len; |
| 602 | |
| 603 | while (*beg && isspace (*beg)) ++beg; |
| 604 | |
| 605 | for (end = beg; *end && ! isspace (*end); ++end) |
| 606 | if (*end == '/') beg = end+1; /* skip directory part */ |
| 607 | |
| 608 | len = end - beg; |
| 609 | if (len > 4 && end[-4] == '.' && end[-3] == 'o') |
| 610 | len -= 2; /* Just take .o if it ends in .obj */ |
| 611 | |
| 612 | if (len > 0) |
| 613 | Vbuild_files = Fcons (make_string (beg, len), Vbuild_files); |
| 614 | } |
| 615 | Vbuild_files = Fpurecopy (Vbuild_files); |
| 616 | } |
| 617 | |
| 618 | fd = emacs_open (name, O_RDONLY, 0); |
| 619 | if (fd < 0) |
| 620 | report_file_error ("Opening doc string file", |
| 621 | Fcons (build_string (name), Qnil)); |
| 622 | Vdoc_file_name = filename; |
| 623 | filled = 0; |
| 624 | pos = 0; |
| 625 | while (1) |
| 626 | { |
| 627 | if (filled < 512) |
| 628 | filled += emacs_read (fd, &buf[filled], sizeof buf - 1 - filled); |
| 629 | if (!filled) |
| 630 | break; |
| 631 | |
| 632 | buf[filled] = 0; |
| 633 | p = buf; |
| 634 | end = buf + (filled < 512 ? filled : filled - 128); |
| 635 | while (p != end && *p != '\037') p++; |
| 636 | /* p points to ^_Ffunctionname\n or ^_Vvarname\n. */ |
| 637 | if (p != end) |
| 638 | { |
| 639 | end = (char *) index (p, '\n'); |
| 640 | |
| 641 | /* See if this is a file name, and if it is a file in build-files. */ |
| 642 | if (p[1] == 'S' && end - p > 4 && end[-2] == '.' |
| 643 | && (end[-1] == 'o' || end[-1] == 'c')) |
| 644 | { |
| 645 | int len = end - p - 2; |
| 646 | char *fromfile = alloca (len + 1); |
| 647 | strncpy (fromfile, &p[2], len); |
| 648 | fromfile[len] = 0; |
| 649 | if (fromfile[len-1] == 'c') |
| 650 | fromfile[len-1] = 'o'; |
| 651 | |
| 652 | skip_file = NILP (Fmember (build_string (fromfile), |
| 653 | Vbuild_files)); |
| 654 | } |
| 655 | |
| 656 | sym = oblookup (Vobarray, p + 2, |
| 657 | multibyte_chars_in_text (p + 2, end - p - 2), |
| 658 | end - p - 2); |
| 659 | /* Check skip_file so that when a function is defined several |
| 660 | times in different files (typically, once in xterm, once in |
| 661 | w32term, ...), we only pay attention to the one that |
| 662 | matters. */ |
| 663 | if (! skip_file && SYMBOLP (sym)) |
| 664 | { |
| 665 | /* Attach a docstring to a variable? */ |
| 666 | if (p[1] == 'V') |
| 667 | { |
| 668 | /* Install file-position as variable-documentation property |
| 669 | and make it negative for a user-variable |
| 670 | (doc starts with a `*'). */ |
| 671 | Fput (sym, Qvariable_documentation, |
| 672 | make_number ((pos + end + 1 - buf) |
| 673 | * (end[1] == '*' ? -1 : 1))); |
| 674 | } |
| 675 | |
| 676 | /* Attach a docstring to a function? */ |
| 677 | else if (p[1] == 'F') |
| 678 | store_function_docstring (sym, pos + end + 1 - buf); |
| 679 | |
| 680 | else if (p[1] == 'S') |
| 681 | ; /* Just a source file name boundary marker. Ignore it. */ |
| 682 | |
| 683 | else |
| 684 | error ("DOC file invalid at position %d", pos); |
| 685 | } |
| 686 | } |
| 687 | pos += end - buf; |
| 688 | filled -= end - buf; |
| 689 | bcopy (end, buf, filled); |
| 690 | } |
| 691 | emacs_close (fd); |
| 692 | return Qnil; |
| 693 | } |
| 694 | \f |
| 695 | DEFUN ("substitute-command-keys", Fsubstitute_command_keys, |
| 696 | Ssubstitute_command_keys, 1, 1, 0, |
| 697 | doc: /* Substitute key descriptions for command names in STRING. |
| 698 | Substrings of the form \\=\\[COMMAND] replaced by either: a keystroke |
| 699 | sequence that will invoke COMMAND, or "M-x COMMAND" if COMMAND is not |
| 700 | on any keys. |
| 701 | Substrings of the form \\=\\{MAPVAR} are replaced by summaries |
| 702 | \(made by `describe-bindings') of the value of MAPVAR, taken as a keymap. |
| 703 | Substrings of the form \\=\\<MAPVAR> specify to use the value of MAPVAR |
| 704 | as the keymap for future \\=\\[COMMAND] substrings. |
| 705 | \\=\\= quotes the following character and is discarded; |
| 706 | thus, \\=\\=\\=\\= puts \\=\\= into the output, and \\=\\=\\=\\[ puts \\=\\[ into the output. |
| 707 | |
| 708 | Returns original STRING if no substitutions were made. Otherwise, |
| 709 | a new string, without any text properties, is returned. */) |
| 710 | (string) |
| 711 | Lisp_Object string; |
| 712 | { |
| 713 | unsigned char *buf; |
| 714 | int changed = 0; |
| 715 | register unsigned char *strp; |
| 716 | register unsigned char *bufp; |
| 717 | int idx; |
| 718 | int bsize; |
| 719 | Lisp_Object tem; |
| 720 | Lisp_Object keymap; |
| 721 | unsigned char *start; |
| 722 | int length, length_byte; |
| 723 | Lisp_Object name; |
| 724 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 725 | int multibyte; |
| 726 | int nchars; |
| 727 | |
| 728 | if (NILP (string)) |
| 729 | return Qnil; |
| 730 | |
| 731 | CHECK_STRING (string); |
| 732 | tem = Qnil; |
| 733 | keymap = Qnil; |
| 734 | name = Qnil; |
| 735 | GCPRO4 (string, tem, keymap, name); |
| 736 | |
| 737 | multibyte = STRING_MULTIBYTE (string); |
| 738 | nchars = 0; |
| 739 | |
| 740 | /* KEYMAP is either nil (which means search all the active keymaps) |
| 741 | or a specified local map (which means search just that and the |
| 742 | global map). If non-nil, it might come from Voverriding_local_map, |
| 743 | or from a \\<mapname> construct in STRING itself.. */ |
| 744 | keymap = current_kboard->Voverriding_terminal_local_map; |
| 745 | if (NILP (keymap)) |
| 746 | keymap = Voverriding_local_map; |
| 747 | |
| 748 | bsize = SBYTES (string); |
| 749 | bufp = buf = (unsigned char *) xmalloc (bsize); |
| 750 | |
| 751 | strp = SDATA (string); |
| 752 | while (strp < SDATA (string) + SBYTES (string)) |
| 753 | { |
| 754 | if (strp[0] == '\\' && strp[1] == '=') |
| 755 | { |
| 756 | /* \= quotes the next character; |
| 757 | thus, to put in \[ without its special meaning, use \=\[. */ |
| 758 | changed = 1; |
| 759 | strp += 2; |
| 760 | if (multibyte) |
| 761 | { |
| 762 | int len; |
| 763 | |
| 764 | STRING_CHAR_AND_LENGTH (strp, len); |
| 765 | if (len == 1) |
| 766 | *bufp = *strp; |
| 767 | else |
| 768 | bcopy (strp, bufp, len); |
| 769 | strp += len; |
| 770 | bufp += len; |
| 771 | nchars++; |
| 772 | } |
| 773 | else |
| 774 | *bufp++ = *strp++, nchars++; |
| 775 | } |
| 776 | else if (strp[0] == '\\' && strp[1] == '[') |
| 777 | { |
| 778 | int start_idx; |
| 779 | int follow_remap = 1; |
| 780 | |
| 781 | changed = 1; |
| 782 | strp += 2; /* skip \[ */ |
| 783 | start = strp; |
| 784 | start_idx = start - SDATA (string); |
| 785 | |
| 786 | while ((strp - SDATA (string) |
| 787 | < SBYTES (string)) |
| 788 | && *strp != ']') |
| 789 | strp++; |
| 790 | length_byte = strp - start; |
| 791 | |
| 792 | strp++; /* skip ] */ |
| 793 | |
| 794 | /* Save STRP in IDX. */ |
| 795 | idx = strp - SDATA (string); |
| 796 | name = Fintern (make_string (start, length_byte), Qnil); |
| 797 | |
| 798 | do_remap: |
| 799 | tem = Fwhere_is_internal (name, keymap, Qt, Qnil, Qnil); |
| 800 | |
| 801 | if (VECTORP (tem) && XVECTOR (tem)->size > 1 |
| 802 | && EQ (AREF (tem, 0), Qremap) && SYMBOLP (AREF (tem, 1)) |
| 803 | && follow_remap) |
| 804 | { |
| 805 | name = AREF (tem, 1); |
| 806 | follow_remap = 0; |
| 807 | goto do_remap; |
| 808 | } |
| 809 | |
| 810 | /* Note the Fwhere_is_internal can GC, so we have to take |
| 811 | relocation of string contents into account. */ |
| 812 | strp = SDATA (string) + idx; |
| 813 | start = SDATA (string) + start_idx; |
| 814 | |
| 815 | if (NILP (tem)) /* but not on any keys */ |
| 816 | { |
| 817 | int offset = bufp - buf; |
| 818 | buf = (unsigned char *) xrealloc (buf, bsize += 4); |
| 819 | bufp = buf + offset; |
| 820 | bcopy ("M-x ", bufp, 4); |
| 821 | bufp += 4; |
| 822 | nchars += 4; |
| 823 | if (multibyte) |
| 824 | length = multibyte_chars_in_text (start, length_byte); |
| 825 | else |
| 826 | length = length_byte; |
| 827 | goto subst; |
| 828 | } |
| 829 | else |
| 830 | { /* function is on a key */ |
| 831 | tem = Fkey_description (tem, Qnil); |
| 832 | goto subst_string; |
| 833 | } |
| 834 | } |
| 835 | /* \{foo} is replaced with a summary of the keymap (symbol-value foo). |
| 836 | \<foo> just sets the keymap used for \[cmd]. */ |
| 837 | else if (strp[0] == '\\' && (strp[1] == '{' || strp[1] == '<')) |
| 838 | { |
| 839 | struct buffer *oldbuf; |
| 840 | int start_idx; |
| 841 | /* This is for computing the SHADOWS arg for describe_map_tree. */ |
| 842 | Lisp_Object active_maps = Fcurrent_active_maps (Qnil, Qnil); |
| 843 | Lisp_Object earlier_maps; |
| 844 | |
| 845 | changed = 1; |
| 846 | strp += 2; /* skip \{ or \< */ |
| 847 | start = strp; |
| 848 | start_idx = start - SDATA (string); |
| 849 | |
| 850 | while ((strp - SDATA (string) < SBYTES (string)) |
| 851 | && *strp != '}' && *strp != '>') |
| 852 | strp++; |
| 853 | |
| 854 | length_byte = strp - start; |
| 855 | strp++; /* skip } or > */ |
| 856 | |
| 857 | /* Save STRP in IDX. */ |
| 858 | idx = strp - SDATA (string); |
| 859 | |
| 860 | /* Get the value of the keymap in TEM, or nil if undefined. |
| 861 | Do this while still in the user's current buffer |
| 862 | in case it is a local variable. */ |
| 863 | name = Fintern (make_string (start, length_byte), Qnil); |
| 864 | tem = Fboundp (name); |
| 865 | if (! NILP (tem)) |
| 866 | { |
| 867 | tem = Fsymbol_value (name); |
| 868 | if (! NILP (tem)) |
| 869 | { |
| 870 | tem = get_keymap (tem, 0, 1); |
| 871 | /* Note that get_keymap can GC. */ |
| 872 | strp = SDATA (string) + idx; |
| 873 | start = SDATA (string) + start_idx; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /* Now switch to a temp buffer. */ |
| 878 | oldbuf = current_buffer; |
| 879 | set_buffer_internal (XBUFFER (Vprin1_to_string_buffer)); |
| 880 | |
| 881 | if (NILP (tem)) |
| 882 | { |
| 883 | name = Fsymbol_name (name); |
| 884 | insert_string ("\nUses keymap \""); |
| 885 | insert_from_string (name, 0, 0, |
| 886 | SCHARS (name), |
| 887 | SBYTES (name), 1); |
| 888 | insert_string ("\", which is not currently defined.\n"); |
| 889 | if (start[-1] == '<') keymap = Qnil; |
| 890 | } |
| 891 | else if (start[-1] == '<') |
| 892 | keymap = tem; |
| 893 | else |
| 894 | { |
| 895 | /* Get the list of active keymaps that precede this one. |
| 896 | If this one's not active, get nil. */ |
| 897 | earlier_maps = Fcdr (Fmemq (tem, Freverse (active_maps))); |
| 898 | describe_map_tree (tem, 1, Fnreverse (earlier_maps), |
| 899 | Qnil, (char *)0, 1, 0, 0, 1); |
| 900 | } |
| 901 | tem = Fbuffer_string (); |
| 902 | Ferase_buffer (); |
| 903 | set_buffer_internal (oldbuf); |
| 904 | |
| 905 | subst_string: |
| 906 | start = SDATA (tem); |
| 907 | length = SCHARS (tem); |
| 908 | length_byte = SBYTES (tem); |
| 909 | subst: |
| 910 | { |
| 911 | int offset = bufp - buf; |
| 912 | buf = (unsigned char *) xrealloc (buf, bsize += length_byte); |
| 913 | bufp = buf + offset; |
| 914 | bcopy (start, bufp, length_byte); |
| 915 | bufp += length_byte; |
| 916 | nchars += length; |
| 917 | /* Check STRING again in case gc relocated it. */ |
| 918 | strp = (unsigned char *) SDATA (string) + idx; |
| 919 | } |
| 920 | } |
| 921 | else if (! multibyte) /* just copy other chars */ |
| 922 | *bufp++ = *strp++, nchars++; |
| 923 | else |
| 924 | { |
| 925 | int len; |
| 926 | |
| 927 | STRING_CHAR_AND_LENGTH (strp, len); |
| 928 | if (len == 1) |
| 929 | *bufp = *strp; |
| 930 | else |
| 931 | bcopy (strp, bufp, len); |
| 932 | strp += len; |
| 933 | bufp += len; |
| 934 | nchars++; |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | if (changed) /* don't bother if nothing substituted */ |
| 939 | tem = make_string_from_bytes (buf, nchars, bufp - buf); |
| 940 | else |
| 941 | tem = string; |
| 942 | xfree (buf); |
| 943 | RETURN_UNGCPRO (tem); |
| 944 | } |
| 945 | \f |
| 946 | void |
| 947 | syms_of_doc (void) |
| 948 | { |
| 949 | Qfunction_documentation = intern_c_string ("function-documentation"); |
| 950 | staticpro (&Qfunction_documentation); |
| 951 | |
| 952 | DEFVAR_LISP ("internal-doc-file-name", &Vdoc_file_name, |
| 953 | doc: /* Name of file containing documentation strings of built-in symbols. */); |
| 954 | Vdoc_file_name = Qnil; |
| 955 | |
| 956 | DEFVAR_LISP ("build-files", &Vbuild_files, |
| 957 | doc: /* A list of files used to build this Emacs binary. */); |
| 958 | Vbuild_files = Qnil; |
| 959 | |
| 960 | defsubr (&Sdocumentation); |
| 961 | defsubr (&Sdocumentation_property); |
| 962 | defsubr (&Ssnarf_documentation); |
| 963 | defsubr (&Ssubstitute_command_keys); |
| 964 | } |
| 965 | |
| 966 | /* arch-tag: 56281d4d-6949-43e2-be2e-f6517de744ba |
| 967 | (do not change this comment) */ |