Commit | Line | Data |
---|---|---|
078e7b4a | 1 | /* Lisp parsing and input streams. |
508b171c | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, |
c6c5df7f | 3 | 1993 Free Software Foundation, Inc. |
078e7b4a JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
46947372 | 9 | the Free Software Foundation; either version 2, or (at your option) |
078e7b4a JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
22 | #include <stdio.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/file.h> | |
12e94926 | 26 | #include <ctype.h> |
18160b98 | 27 | #include <config.h> |
078e7b4a JB |
28 | #include "lisp.h" |
29 | ||
30 | #ifndef standalone | |
31 | #include "buffer.h" | |
2a6b3537 | 32 | #include <paths.h> |
078e7b4a | 33 | #include "commands.h" |
e37c0805 | 34 | #include "keyboard.h" |
7bd279cd | 35 | #include "termhooks.h" |
078e7b4a JB |
36 | #endif |
37 | ||
38 | #ifdef lint | |
39 | #include <sys/inode.h> | |
40 | #endif /* lint */ | |
41 | ||
42 | #ifndef X_OK | |
43 | #define X_OK 01 | |
44 | #endif | |
45 | ||
46 | #ifdef LISP_FLOAT_TYPE | |
93b91208 JB |
47 | #ifdef STDC_HEADERS |
48 | #include <stdlib.h> | |
49 | #endif | |
23a71bd6 RS |
50 | |
51 | #if 0 /* That is untrue--XINT is used below, and it uses INTBITS. | |
52 | What in the world is values.h, anyway? */ | |
53 | #ifdef MSDOS | |
54 | /* These are redefined in <values.h> and not used here */ | |
55 | #undef INTBITS | |
56 | #undef LONGBITS | |
57 | #undef SHORTBITS | |
58 | #endif | |
59 | #endif | |
60 | ||
078e7b4a JB |
61 | #include <math.h> |
62 | #endif /* LISP_FLOAT_TYPE */ | |
63 | ||
8a1f1537 | 64 | Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list; |
078e7b4a | 65 | Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist; |
c2225d00 | 66 | Lisp_Object Qascii_character, Qload; |
7bd279cd RS |
67 | |
68 | extern Lisp_Object Qevent_symbol_element_mask; | |
078e7b4a JB |
69 | |
70 | /* non-zero if inside `load' */ | |
71 | int load_in_progress; | |
72 | ||
73 | /* Search path for files to be loaded. */ | |
74 | Lisp_Object Vload_path; | |
75 | ||
ae321d28 RS |
76 | /* This is the user-visible association list that maps features to |
77 | lists of defs in their load files. */ | |
78 | Lisp_Object Vload_history; | |
79 | ||
80 | /* This is useud to build the load history. */ | |
81 | Lisp_Object Vcurrent_load_list; | |
82 | ||
d2c6be7f RS |
83 | /* List of descriptors now open for Fload. */ |
84 | static Lisp_Object load_descriptor_list; | |
85 | ||
078e7b4a JB |
86 | /* File for get_file_char to read from. Use by load */ |
87 | static FILE *instream; | |
88 | ||
89 | /* When nonzero, read conses in pure space */ | |
90 | static int read_pure; | |
91 | ||
92 | /* For use within read-from-string (this reader is non-reentrant!!) */ | |
93 | static int read_from_string_index; | |
94 | static int read_from_string_limit; | |
95 | \f | |
96 | /* Handle unreading and rereading of characters. | |
97 | Write READCHAR to read a character, | |
98 | UNREAD(c) to unread c to be read again. */ | |
99 | ||
100 | #define READCHAR readchar (readcharfun) | |
101 | #define UNREAD(c) unreadchar (readcharfun, c) | |
102 | ||
103 | static int | |
104 | readchar (readcharfun) | |
105 | Lisp_Object readcharfun; | |
106 | { | |
107 | Lisp_Object tem; | |
108 | register struct buffer *inbuffer; | |
109 | register int c, mpos; | |
110 | ||
111 | if (XTYPE (readcharfun) == Lisp_Buffer) | |
112 | { | |
113 | inbuffer = XBUFFER (readcharfun); | |
114 | ||
115 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) | |
116 | return -1; | |
117 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); | |
118 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); | |
119 | ||
120 | return c; | |
121 | } | |
122 | if (XTYPE (readcharfun) == Lisp_Marker) | |
123 | { | |
124 | inbuffer = XMARKER (readcharfun)->buffer; | |
125 | ||
126 | mpos = marker_position (readcharfun); | |
127 | ||
128 | if (mpos > BUF_ZV (inbuffer) - 1) | |
129 | return -1; | |
130 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); | |
131 | if (mpos != BUF_GPT (inbuffer)) | |
132 | XMARKER (readcharfun)->bufpos++; | |
133 | else | |
134 | Fset_marker (readcharfun, make_number (mpos + 1), | |
135 | Fmarker_buffer (readcharfun)); | |
136 | return c; | |
137 | } | |
138 | if (EQ (readcharfun, Qget_file_char)) | |
139 | return getc (instream); | |
140 | ||
141 | if (XTYPE (readcharfun) == Lisp_String) | |
142 | { | |
143 | register int c; | |
144 | /* This used to be return of a conditional expression, | |
145 | but that truncated -1 to a char on VMS. */ | |
146 | if (read_from_string_index < read_from_string_limit) | |
147 | c = XSTRING (readcharfun)->data[read_from_string_index++]; | |
148 | else | |
149 | c = -1; | |
150 | return c; | |
151 | } | |
152 | ||
153 | tem = call0 (readcharfun); | |
154 | ||
265a9e55 | 155 | if (NILP (tem)) |
078e7b4a JB |
156 | return -1; |
157 | return XINT (tem); | |
158 | } | |
159 | ||
160 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
161 | If the stream is a user function, call it with the char as argument. */ | |
162 | ||
163 | static void | |
164 | unreadchar (readcharfun, c) | |
165 | Lisp_Object readcharfun; | |
166 | int c; | |
167 | { | |
92fddec9 KH |
168 | if (c == -1) |
169 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
170 | since readchar didn't advance it when we read it. */ | |
171 | ; | |
172 | else if (XTYPE (readcharfun) == Lisp_Buffer) | |
078e7b4a JB |
173 | { |
174 | if (XBUFFER (readcharfun) == current_buffer) | |
175 | SET_PT (point - 1); | |
176 | else | |
177 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
178 | } | |
179 | else if (XTYPE (readcharfun) == Lisp_Marker) | |
180 | XMARKER (readcharfun)->bufpos--; | |
181 | else if (XTYPE (readcharfun) == Lisp_String) | |
182 | read_from_string_index--; | |
183 | else if (EQ (readcharfun, Qget_file_char)) | |
184 | ungetc (c, instream); | |
185 | else | |
186 | call1 (readcharfun, make_number (c)); | |
187 | } | |
188 | ||
189 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
190 | \f | |
191 | /* get a character from the tty */ | |
192 | ||
3d9b22be JB |
193 | extern Lisp_Object read_char (); |
194 | ||
f42be754 JB |
195 | /* Read input events until we get one that's acceptable for our purposes. |
196 | ||
197 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
198 | until we get a character we like, and then stuffed into | |
199 | unread_switch_frame. | |
200 | ||
201 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
202 | if the unmodified version of the symbol has a Qascii_character | |
203 | property, and use that character, if present. | |
204 | ||
205 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
206 | get isn't an ASCII character with modifiers. If it's zero but | |
207 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
208 | character. */ | |
209 | Lisp_Object | |
210 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) | |
211 | int no_switch_frame, ascii_required, error_nonascii; | |
212 | { | |
213 | #ifdef standalone | |
214 | return make_number (getchar ()); | |
215 | #else | |
153a17b7 KH |
216 | register Lisp_Object val, delayed_switch_frame; |
217 | ||
218 | delayed_switch_frame = Qnil; | |
f42be754 JB |
219 | |
220 | /* Read until we get an acceptable event. */ | |
221 | retry: | |
222 | val = read_char (0, 0, 0, Qnil, 0); | |
223 | ||
6c82d689 KH |
224 | if (XTYPE (val) == Lisp_Buffer) |
225 | goto retry; | |
226 | ||
f42be754 JB |
227 | /* switch-frame events are put off until after the next ASCII |
228 | character. This is better than signalling an error just because | |
229 | the last characters were typed to a separate minibuffer frame, | |
230 | for example. Eventually, some code which can deal with | |
231 | switch-frame events will read it and process it. */ | |
232 | if (no_switch_frame | |
233 | && EVENT_HAS_PARAMETERS (val) | |
234 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
235 | { | |
236 | delayed_switch_frame = val; | |
237 | goto retry; | |
238 | } | |
239 | ||
240 | if (ascii_required) | |
241 | { | |
242 | /* Convert certain symbols to their ASCII equivalents. */ | |
243 | if (XTYPE (val) == Lisp_Symbol) | |
244 | { | |
245 | Lisp_Object tem, tem1, tem2; | |
246 | tem = Fget (val, Qevent_symbol_element_mask); | |
247 | if (!NILP (tem)) | |
248 | { | |
249 | tem1 = Fget (Fcar (tem), Qascii_character); | |
250 | /* Merge this symbol's modifier bits | |
251 | with the ASCII equivalent of its basic code. */ | |
252 | if (!NILP (tem1)) | |
253 | XFASTINT (val) = XINT (tem1) | XINT (Fcar (Fcdr (tem))); | |
254 | } | |
255 | } | |
256 | ||
257 | /* If we don't have a character now, deal with it appropriately. */ | |
258 | if (XTYPE (val) != Lisp_Int) | |
259 | { | |
260 | if (error_nonascii) | |
261 | { | |
262 | unread_command_events = Fcons (val, Qnil); | |
263 | error ("Non-character input-event"); | |
264 | } | |
265 | else | |
266 | goto retry; | |
267 | } | |
268 | } | |
269 | ||
270 | if (! NILP (delayed_switch_frame)) | |
271 | unread_switch_frame = delayed_switch_frame; | |
272 | ||
273 | return val; | |
274 | #endif | |
275 | } | |
276 | ||
078e7b4a JB |
277 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
278 | "Read a character from the command input (keyboard or macro).\n\ | |
e51e47f7 JB |
279 | It is returned as a number.\n\ |
280 | If the user generates an event which is not a character (i.e. a mouse\n\ | |
e37c0805 JB |
281 | click or function key event), `read-char' signals an error. As an\n\ |
282 | exception, switch-frame events are put off until non-ASCII events can\n\ | |
283 | be read.\n\ | |
284 | If you want to read non-character events, or ignore them, call\n\ | |
285 | `read-event' or `read-char-exclusive' instead.") | |
078e7b4a JB |
286 | () |
287 | { | |
f42be754 | 288 | return read_filtered_event (1, 1, 1); |
078e7b4a JB |
289 | } |
290 | ||
078e7b4a JB |
291 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
292 | "Read an event object from the input stream.") | |
293 | () | |
294 | { | |
f42be754 | 295 | return read_filtered_event (0, 0, 0); |
078e7b4a JB |
296 | } |
297 | ||
298 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, | |
299 | "Read a character from the command input (keyboard or macro).\n\ | |
300 | It is returned as a number. Non character events are ignored.") | |
301 | () | |
302 | { | |
f42be754 | 303 | return read_filtered_event (1, 1, 0); |
078e7b4a | 304 | } |
078e7b4a JB |
305 | |
306 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
307 | "Don't use this yourself.") | |
308 | () | |
309 | { | |
310 | register Lisp_Object val; | |
311 | XSET (val, Lisp_Int, getc (instream)); | |
312 | return val; | |
313 | } | |
314 | \f | |
315 | static void readevalloop (); | |
316 | static Lisp_Object load_unwind (); | |
d2c6be7f | 317 | static Lisp_Object load_descriptor_unwind (); |
078e7b4a JB |
318 | |
319 | DEFUN ("load", Fload, Sload, 1, 4, 0, | |
320 | "Execute a file of Lisp code named FILE.\n\ | |
321 | First try FILE with `.elc' appended, then try with `.el',\n\ | |
322 | then try FILE unmodified.\n\ | |
323 | This function searches the directories in `load-path'.\n\ | |
324 | If optional second arg NOERROR is non-nil,\n\ | |
325 | report no error if FILE doesn't exist.\n\ | |
326 | Print messages at start and end of loading unless\n\ | |
327 | optional third arg NOMESSAGE is non-nil.\n\ | |
328 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ | |
329 | suffixes `.elc' or `.el' to the specified name FILE.\n\ | |
330 | Return t if file exists.") | |
331 | (str, noerror, nomessage, nosuffix) | |
332 | Lisp_Object str, noerror, nomessage, nosuffix; | |
333 | { | |
334 | register FILE *stream; | |
335 | register int fd = -1; | |
336 | register Lisp_Object lispstream; | |
337 | register FILE **ptr; | |
338 | int count = specpdl_ptr - specpdl; | |
339 | Lisp_Object temp; | |
340 | struct gcpro gcpro1; | |
341 | Lisp_Object found; | |
51ac6f83 RS |
342 | /* 1 means inhibit the message at the beginning. */ |
343 | int nomessage1 = 0; | |
c2225d00 | 344 | Lisp_Object handler; |
23a71bd6 RS |
345 | #ifdef MSDOS |
346 | char *dosmode = "rt"; | |
347 | #endif | |
078e7b4a JB |
348 | |
349 | CHECK_STRING (str, 0); | |
350 | str = Fsubstitute_in_file_name (str); | |
351 | ||
c2225d00 | 352 | /* If file name is magic, call the handler. */ |
a617e913 | 353 | handler = Ffind_file_name_handler (str, Qload); |
c2225d00 | 354 | if (!NILP (handler)) |
8a2c760a | 355 | return call5 (handler, Qload, str, noerror, nomessage, nosuffix); |
c2225d00 | 356 | |
078e7b4a JB |
357 | /* Avoid weird lossage with null string as arg, |
358 | since it would try to load a directory as a Lisp file */ | |
359 | if (XSTRING (str)->size > 0) | |
360 | { | |
5a6e5452 | 361 | GCPRO1 (str); |
265a9e55 | 362 | fd = openp (Vload_path, str, !NILP (nosuffix) ? "" : ".elc:.el:", |
078e7b4a | 363 | &found, 0); |
5a6e5452 | 364 | UNGCPRO; |
078e7b4a JB |
365 | } |
366 | ||
367 | if (fd < 0) | |
368 | { | |
265a9e55 | 369 | if (NILP (noerror)) |
078e7b4a JB |
370 | while (1) |
371 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
372 | Fcons (str, Qnil))); | |
373 | else | |
374 | return Qnil; | |
375 | } | |
376 | ||
377 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), | |
378 | ".elc", 4)) | |
379 | { | |
380 | struct stat s1, s2; | |
381 | int result; | |
382 | ||
23a71bd6 RS |
383 | #ifdef MSDOS |
384 | dosmode = "rb"; | |
385 | #endif | |
4ff37b08 | 386 | stat ((char *)XSTRING (found)->data, &s1); |
078e7b4a | 387 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
4ff37b08 | 388 | result = stat ((char *)XSTRING (found)->data, &s2); |
078e7b4a | 389 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
51ac6f83 RS |
390 | { |
391 | message ("Source file `%s' newer than byte-compiled file", | |
392 | XSTRING (found)->data); | |
393 | /* Don't immediately overwrite this message. */ | |
394 | if (!noninteractive) | |
395 | nomessage1 = 1; | |
396 | } | |
078e7b4a JB |
397 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
398 | } | |
399 | ||
23a71bd6 RS |
400 | #ifdef MSDOS |
401 | close (fd); | |
402 | stream = fopen ((char *) XSTRING (found)->data, dosmode); | |
403 | #else | |
078e7b4a | 404 | stream = fdopen (fd, "r"); |
23a71bd6 | 405 | #endif |
078e7b4a JB |
406 | if (stream == 0) |
407 | { | |
408 | close (fd); | |
409 | error ("Failure to create stdio stream for %s", XSTRING (str)->data); | |
410 | } | |
411 | ||
51ac6f83 | 412 | if (NILP (nomessage) && !nomessage1) |
078e7b4a JB |
413 | message ("Loading %s...", XSTRING (str)->data); |
414 | ||
415 | GCPRO1 (str); | |
416 | /* We may not be able to store STREAM itself as a Lisp_Object pointer | |
417 | since that is guaranteed to work only for data that has been malloc'd. | |
418 | So malloc a full-size pointer, and record the address of that pointer. */ | |
419 | ptr = (FILE **) xmalloc (sizeof (FILE *)); | |
420 | *ptr = stream; | |
421 | XSET (lispstream, Lisp_Internal_Stream, (int) ptr); | |
422 | record_unwind_protect (load_unwind, lispstream); | |
d2c6be7f RS |
423 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
424 | load_descriptor_list | |
425 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 426 | load_in_progress++; |
ae321d28 | 427 | readevalloop (Qget_file_char, stream, str, Feval, 0); |
078e7b4a JB |
428 | unbind_to (count, Qnil); |
429 | ||
430 | /* Run any load-hooks for this file. */ | |
431 | temp = Fassoc (str, Vafter_load_alist); | |
265a9e55 | 432 | if (!NILP (temp)) |
078e7b4a JB |
433 | Fprogn (Fcdr (temp)); |
434 | UNGCPRO; | |
435 | ||
265a9e55 | 436 | if (!noninteractive && NILP (nomessage)) |
078e7b4a JB |
437 | message ("Loading %s...done", XSTRING (str)->data); |
438 | return Qt; | |
439 | } | |
440 | ||
441 | static Lisp_Object | |
442 | load_unwind (stream) /* used as unwind-protect function in load */ | |
443 | Lisp_Object stream; | |
444 | { | |
445 | fclose (*(FILE **) XSTRING (stream)); | |
9ac0d9e0 | 446 | xfree (XPNTR (stream)); |
078e7b4a JB |
447 | if (--load_in_progress < 0) load_in_progress = 0; |
448 | return Qnil; | |
449 | } | |
450 | ||
d2c6be7f RS |
451 | static Lisp_Object |
452 | load_descriptor_unwind (oldlist) | |
453 | Lisp_Object oldlist; | |
454 | { | |
455 | load_descriptor_list = oldlist; | |
456 | } | |
457 | ||
458 | /* Close all descriptors in use for Floads. | |
459 | This is used when starting a subprocess. */ | |
460 | ||
461 | void | |
462 | close_load_descs () | |
463 | { | |
464 | Lisp_Object tail; | |
465 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) | |
466 | close (XFASTINT (XCONS (tail)->car)); | |
467 | } | |
078e7b4a JB |
468 | \f |
469 | static int | |
470 | complete_filename_p (pathname) | |
471 | Lisp_Object pathname; | |
472 | { | |
473 | register unsigned char *s = XSTRING (pathname)->data; | |
474 | return (*s == '/' | |
475 | #ifdef ALTOS | |
476 | || *s == '@' | |
477 | #endif | |
478 | #ifdef VMS | |
479 | || index (s, ':') | |
480 | #endif /* VMS */ | |
23a71bd6 RS |
481 | #ifdef MSDOS /* MW, May 1993 */ |
482 | || (s[0] != '\0' && s[1] == ':' && s[2] == '/') | |
483 | #endif | |
078e7b4a JB |
484 | ); |
485 | } | |
486 | ||
487 | /* Search for a file whose name is STR, looking in directories | |
488 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
489 | SUFFIX is a string containing possible suffixes separated by colons. | |
490 | On success, returns a file descriptor. On failure, returns -1. | |
491 | ||
492 | EXEC_ONLY nonzero means don't open the files, | |
493 | just look for one that is executable. In this case, | |
494 | returns 1 on success. | |
495 | ||
496 | If STOREPTR is nonzero, it points to a slot where the name of | |
497 | the file actually found should be stored as a Lisp string. | |
498 | Nil is stored there on failure. */ | |
499 | ||
500 | int | |
501 | openp (path, str, suffix, storeptr, exec_only) | |
502 | Lisp_Object path, str; | |
503 | char *suffix; | |
504 | Lisp_Object *storeptr; | |
505 | int exec_only; | |
506 | { | |
507 | register int fd; | |
508 | int fn_size = 100; | |
509 | char buf[100]; | |
510 | register char *fn = buf; | |
511 | int absolute = 0; | |
512 | int want_size; | |
513 | register Lisp_Object filename; | |
514 | struct stat st; | |
5a6e5452 | 515 | struct gcpro gcpro1; |
078e7b4a | 516 | |
5a6e5452 | 517 | GCPRO1 (str); |
078e7b4a JB |
518 | if (storeptr) |
519 | *storeptr = Qnil; | |
520 | ||
521 | if (complete_filename_p (str)) | |
522 | absolute = 1; | |
523 | ||
265a9e55 | 524 | for (; !NILP (path); path = Fcdr (path)) |
078e7b4a JB |
525 | { |
526 | char *nsuffix; | |
527 | ||
528 | filename = Fexpand_file_name (str, Fcar (path)); | |
529 | if (!complete_filename_p (filename)) | |
530 | /* If there are non-absolute elts in PATH (eg ".") */ | |
531 | /* Of course, this could conceivably lose if luser sets | |
532 | default-directory to be something non-absolute... */ | |
533 | { | |
534 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
535 | if (!complete_filename_p (filename)) | |
536 | /* Give up on this path element! */ | |
537 | continue; | |
538 | } | |
539 | ||
540 | /* Calculate maximum size of any filename made from | |
541 | this path element/specified file name and any possible suffix. */ | |
542 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; | |
543 | if (fn_size < want_size) | |
544 | fn = (char *) alloca (fn_size = 100 + want_size); | |
545 | ||
546 | nsuffix = suffix; | |
547 | ||
548 | /* Loop over suffixes. */ | |
549 | while (1) | |
550 | { | |
551 | char *esuffix = (char *) index (nsuffix, ':'); | |
552 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); | |
553 | ||
554 | /* Concatenate path element/specified name with the suffix. */ | |
555 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); | |
556 | fn[XSTRING (filename)->size] = 0; | |
557 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ | |
558 | strncat (fn, nsuffix, lsuffix); | |
559 | ||
560 | /* Ignore file if it's a directory. */ | |
561 | if (stat (fn, &st) >= 0 | |
562 | && (st.st_mode & S_IFMT) != S_IFDIR) | |
563 | { | |
564 | /* Check that we can access or open it. */ | |
565 | if (exec_only) | |
566 | fd = (access (fn, X_OK) == 0) ? 1 : -1; | |
567 | else | |
568 | fd = open (fn, 0, 0); | |
569 | ||
570 | if (fd >= 0) | |
571 | { | |
572 | /* We succeeded; return this descriptor and filename. */ | |
573 | if (storeptr) | |
574 | *storeptr = build_string (fn); | |
5a6e5452 | 575 | RETURN_UNGCPRO (fd); |
078e7b4a JB |
576 | } |
577 | } | |
578 | ||
579 | /* Advance to next suffix. */ | |
580 | if (esuffix == 0) | |
581 | break; | |
582 | nsuffix += lsuffix + 1; | |
583 | } | |
5a6e5452 KH |
584 | if (absolute) |
585 | RETURN_UNGCPRO (-1); | |
078e7b4a JB |
586 | } |
587 | ||
5a6e5452 | 588 | RETURN_UNGCPRO (-1); |
078e7b4a JB |
589 | } |
590 | ||
591 | \f | |
ae321d28 RS |
592 | /* Merge the list we've accumulated of globals from the current input source |
593 | into the load_history variable. The details depend on whether | |
594 | the source has an associated file name or not. */ | |
595 | ||
596 | static void | |
597 | build_load_history (stream, source) | |
598 | FILE *stream; | |
599 | Lisp_Object source; | |
600 | { | |
601 | register Lisp_Object tail, prev, newelt; | |
602 | register Lisp_Object tem, tem2; | |
603 | register int foundit, loading; | |
604 | ||
8a1f1537 RS |
605 | /* Don't bother recording anything for preloaded files. */ |
606 | if (!NILP (Vpurify_flag)) | |
607 | return; | |
608 | ||
ae321d28 RS |
609 | loading = stream || !NARROWED; |
610 | ||
611 | tail = Vload_history; | |
612 | prev = Qnil; | |
613 | foundit = 0; | |
614 | while (!NILP (tail)) | |
615 | { | |
616 | tem = Fcar (tail); | |
617 | ||
618 | /* Find the feature's previous assoc list... */ | |
619 | if (!NILP (Fequal (source, Fcar (tem)))) | |
620 | { | |
621 | foundit = 1; | |
622 | ||
623 | /* If we're loading, remove it. */ | |
624 | if (loading) | |
625 | { | |
626 | if (NILP (prev)) | |
627 | Vload_history = Fcdr (tail); | |
628 | else | |
629 | Fsetcdr (prev, Fcdr (tail)); | |
630 | } | |
631 | ||
632 | /* Otherwise, cons on new symbols that are not already members. */ | |
633 | else | |
634 | { | |
635 | tem2 = Vcurrent_load_list; | |
636 | ||
637 | while (CONSP (tem2)) | |
638 | { | |
639 | newelt = Fcar (tem2); | |
640 | ||
641 | if (NILP (Fmemq (newelt, tem))) | |
642 | Fsetcar (tail, Fcons (Fcar (tem), | |
643 | Fcons (newelt, Fcdr (tem)))); | |
644 | ||
645 | tem2 = Fcdr (tem2); | |
646 | QUIT; | |
647 | } | |
648 | } | |
649 | } | |
650 | else | |
651 | prev = tail; | |
652 | tail = Fcdr (tail); | |
653 | QUIT; | |
654 | } | |
655 | ||
8a1f1537 RS |
656 | /* If we're loading, cons the new assoc onto the front of load-history, |
657 | the most-recently-loaded position. Also do this if we didn't find | |
658 | an existing member for the current source. */ | |
659 | if (loading || !foundit) | |
660 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
661 | Vload_history); | |
ae321d28 RS |
662 | } |
663 | ||
078e7b4a JB |
664 | Lisp_Object |
665 | unreadpure () /* Used as unwind-protect function in readevalloop */ | |
666 | { | |
667 | read_pure = 0; | |
668 | return Qnil; | |
669 | } | |
670 | ||
671 | static void | |
ae321d28 | 672 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
078e7b4a | 673 | Lisp_Object readcharfun; |
ae321d28 RS |
674 | FILE *stream; |
675 | Lisp_Object sourcename; | |
078e7b4a JB |
676 | Lisp_Object (*evalfun) (); |
677 | int printflag; | |
678 | { | |
679 | register int c; | |
680 | register Lisp_Object val; | |
681 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 682 | struct gcpro gcpro1; |
49cf7ff4 RS |
683 | struct buffer *b = 0; |
684 | ||
685 | if (BUFFERP (readcharfun)) | |
686 | b = XBUFFER (readcharfun); | |
687 | else if (MARKERP (readcharfun)) | |
688 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
689 | |
690 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 691 | specbind (Qcurrent_load_list, Qnil); |
078e7b4a | 692 | |
8a1f1537 | 693 | GCPRO1 (sourcename); |
ae321d28 | 694 | |
ae321d28 RS |
695 | LOADHIST_ATTACH (sourcename); |
696 | ||
078e7b4a JB |
697 | while (1) |
698 | { | |
49cf7ff4 RS |
699 | if (b != 0 && NILP (b->name)) |
700 | error ("Reading from killed buffer"); | |
701 | ||
078e7b4a JB |
702 | instream = stream; |
703 | c = READCHAR; | |
704 | if (c == ';') | |
705 | { | |
706 | while ((c = READCHAR) != '\n' && c != -1); | |
707 | continue; | |
708 | } | |
709 | if (c < 0) break; | |
710 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f') continue; | |
711 | ||
265a9e55 | 712 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a JB |
713 | { |
714 | record_unwind_protect (unreadpure, Qnil); | |
715 | val = read_list (-1, readcharfun); | |
716 | unbind_to (count + 1, Qnil); | |
717 | } | |
718 | else | |
719 | { | |
720 | UNREAD (c); | |
721 | val = read0 (readcharfun); | |
722 | } | |
723 | ||
724 | val = (*evalfun) (val); | |
725 | if (printflag) | |
726 | { | |
727 | Vvalues = Fcons (val, Vvalues); | |
728 | if (EQ (Vstandard_output, Qt)) | |
729 | Fprin1 (val, Qnil); | |
730 | else | |
731 | Fprint (val, Qnil); | |
732 | } | |
733 | } | |
734 | ||
ae321d28 | 735 | build_load_history (stream, sourcename); |
ae321d28 RS |
736 | UNGCPRO; |
737 | ||
078e7b4a JB |
738 | unbind_to (count, Qnil); |
739 | } | |
740 | ||
741 | #ifndef standalone | |
742 | ||
e5d77022 | 743 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
94b304d7 RS |
744 | "Execute the current buffer as Lisp code.\n\ |
745 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ | |
746 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ | |
747 | PRINTFLAG controls printing of output:\n\ | |
228d4b1c JA |
748 | nil means discard it; anything else is stream for print.\n\ |
749 | \n\ | |
750 | If there is no error, point does not move. If there is an error,\n\ | |
751 | point remains at the end of the last character read from the buffer.") | |
752 | (bufname, printflag) | |
753 | Lisp_Object bufname, printflag; | |
754 | { | |
755 | int count = specpdl_ptr - specpdl; | |
756 | Lisp_Object tem, buf; | |
757 | ||
dfdb645c | 758 | if (NILP (bufname)) |
228d4b1c JA |
759 | buf = Fcurrent_buffer (); |
760 | else | |
761 | buf = Fget_buffer (bufname); | |
dfdb645c | 762 | if (NILP (buf)) |
228d4b1c JA |
763 | error ("No such buffer."); |
764 | ||
dfdb645c | 765 | if (NILP (printflag)) |
228d4b1c JA |
766 | tem = Qsymbolp; |
767 | else | |
768 | tem = printflag; | |
769 | specbind (Qstandard_output, tem); | |
770 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
771 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
ae321d28 | 772 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
cb09ab7a | 773 | unbind_to (count, Qnil); |
228d4b1c JA |
774 | |
775 | return Qnil; | |
776 | } | |
777 | ||
778 | #if 0 | |
078e7b4a JB |
779 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
780 | "Execute the current buffer as Lisp code.\n\ | |
781 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ | |
782 | nil means discard it; anything else is stream for print.\n\ | |
783 | \n\ | |
784 | If there is no error, point does not move. If there is an error,\n\ | |
785 | point remains at the end of the last character read from the buffer.") | |
786 | (printflag) | |
787 | Lisp_Object printflag; | |
788 | { | |
789 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
790 | Lisp_Object tem, cbuf; |
791 | ||
792 | cbuf = Fcurrent_buffer () | |
078e7b4a | 793 | |
265a9e55 | 794 | if (NILP (printflag)) |
078e7b4a JB |
795 | tem = Qsymbolp; |
796 | else | |
797 | tem = printflag; | |
798 | specbind (Qstandard_output, tem); | |
799 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
800 | SET_PT (BEGV); | |
ae321d28 | 801 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
802 | return unbind_to (count, Qnil); |
803 | } | |
228d4b1c | 804 | #endif |
078e7b4a JB |
805 | |
806 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", | |
807 | "Execute the region as Lisp code.\n\ | |
808 | When called from programs, expects two arguments,\n\ | |
809 | giving starting and ending indices in the current buffer\n\ | |
810 | of the text to be executed.\n\ | |
811 | Programs can pass third argument PRINTFLAG which controls output:\n\ | |
812 | nil means discard it; anything else is stream for printing it.\n\ | |
813 | \n\ | |
814 | If there is no error, point does not move. If there is an error,\n\ | |
815 | point remains at the end of the last character read from the buffer.") | |
816 | (b, e, printflag) | |
817 | Lisp_Object b, e, printflag; | |
818 | { | |
819 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
820 | Lisp_Object tem, cbuf; |
821 | ||
822 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 823 | |
265a9e55 | 824 | if (NILP (printflag)) |
078e7b4a JB |
825 | tem = Qsymbolp; |
826 | else | |
827 | tem = printflag; | |
828 | specbind (Qstandard_output, tem); | |
829 | ||
265a9e55 | 830 | if (NILP (printflag)) |
078e7b4a JB |
831 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
832 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
833 | ||
834 | /* This both uses b and checks its type. */ | |
835 | Fgoto_char (b); | |
836 | Fnarrow_to_region (make_number (BEGV), e); | |
ae321d28 | 837 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
838 | |
839 | return unbind_to (count, Qnil); | |
840 | } | |
841 | ||
842 | #endif /* standalone */ | |
843 | \f | |
844 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
845 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ | |
846 | If STREAM is nil, use the value of `standard-input' (which see).\n\ | |
847 | STREAM or the value of `standard-input' may be:\n\ | |
848 | a buffer (read from point and advance it)\n\ | |
849 | a marker (read from where it points and advance it)\n\ | |
850 | a function (call it with no arguments for each character,\n\ | |
851 | call it with a char as argument to push a char back)\n\ | |
852 | a string (takes text from string, starting at the beginning)\n\ | |
853 | t (read text line using minibuffer and use it).") | |
854 | (readcharfun) | |
855 | Lisp_Object readcharfun; | |
856 | { | |
857 | extern Lisp_Object Fread_minibuffer (); | |
858 | ||
265a9e55 | 859 | if (NILP (readcharfun)) |
078e7b4a JB |
860 | readcharfun = Vstandard_input; |
861 | if (EQ (readcharfun, Qt)) | |
862 | readcharfun = Qread_char; | |
863 | ||
864 | #ifndef standalone | |
865 | if (EQ (readcharfun, Qread_char)) | |
866 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); | |
867 | #endif | |
868 | ||
869 | if (XTYPE (readcharfun) == Lisp_String) | |
870 | return Fcar (Fread_from_string (readcharfun, Qnil, Qnil)); | |
871 | ||
872 | return read0 (readcharfun); | |
873 | } | |
874 | ||
875 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
876 | "Read one Lisp expression which is represented as text by STRING.\n\ | |
877 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ | |
878 | START and END optionally delimit a substring of STRING from which to read;\n\ | |
879 | they default to 0 and (length STRING) respectively.") | |
880 | (string, start, end) | |
881 | Lisp_Object string, start, end; | |
882 | { | |
883 | int startval, endval; | |
884 | Lisp_Object tem; | |
885 | ||
886 | CHECK_STRING (string,0); | |
887 | ||
265a9e55 | 888 | if (NILP (end)) |
078e7b4a JB |
889 | endval = XSTRING (string)->size; |
890 | else | |
891 | { CHECK_NUMBER (end,2); | |
892 | endval = XINT (end); | |
893 | if (endval < 0 || endval > XSTRING (string)->size) | |
894 | args_out_of_range (string, end); | |
895 | } | |
896 | ||
265a9e55 | 897 | if (NILP (start)) |
078e7b4a JB |
898 | startval = 0; |
899 | else | |
900 | { CHECK_NUMBER (start,1); | |
901 | startval = XINT (start); | |
902 | if (startval < 0 || startval > endval) | |
903 | args_out_of_range (string, start); | |
904 | } | |
905 | ||
906 | read_from_string_index = startval; | |
907 | read_from_string_limit = endval; | |
908 | ||
909 | tem = read0 (string); | |
910 | return Fcons (tem, make_number (read_from_string_index)); | |
911 | } | |
912 | \f | |
913 | /* Use this for recursive reads, in contexts where internal tokens are not allowed. */ | |
914 | ||
915 | static Lisp_Object | |
916 | read0 (readcharfun) | |
917 | Lisp_Object readcharfun; | |
918 | { | |
919 | register Lisp_Object val; | |
920 | char c; | |
921 | ||
922 | val = read1 (readcharfun); | |
923 | if (XTYPE (val) == Lisp_Internal) | |
924 | { | |
925 | c = XINT (val); | |
926 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); | |
927 | } | |
928 | ||
929 | return val; | |
930 | } | |
931 | \f | |
932 | static int read_buffer_size; | |
933 | static char *read_buffer; | |
934 | ||
935 | static int | |
936 | read_escape (readcharfun) | |
937 | Lisp_Object readcharfun; | |
938 | { | |
939 | register int c = READCHAR; | |
940 | switch (c) | |
941 | { | |
942 | case 'a': | |
265a9e55 | 943 | return '\007'; |
078e7b4a JB |
944 | case 'b': |
945 | return '\b'; | |
f405a585 RS |
946 | case 'd': |
947 | return 0177; | |
078e7b4a JB |
948 | case 'e': |
949 | return 033; | |
950 | case 'f': | |
951 | return '\f'; | |
952 | case 'n': | |
953 | return '\n'; | |
954 | case 'r': | |
955 | return '\r'; | |
956 | case 't': | |
957 | return '\t'; | |
958 | case 'v': | |
959 | return '\v'; | |
960 | case '\n': | |
961 | return -1; | |
962 | ||
963 | case 'M': | |
964 | c = READCHAR; | |
965 | if (c != '-') | |
966 | error ("Invalid escape character syntax"); | |
967 | c = READCHAR; | |
968 | if (c == '\\') | |
969 | c = read_escape (readcharfun); | |
7bd279cd | 970 | return c | meta_modifier; |
f405a585 RS |
971 | |
972 | case 'S': | |
973 | c = READCHAR; | |
974 | if (c != '-') | |
975 | error ("Invalid escape character syntax"); | |
976 | c = READCHAR; | |
977 | if (c == '\\') | |
978 | c = read_escape (readcharfun); | |
7bd279cd RS |
979 | return c | shift_modifier; |
980 | ||
981 | case 'H': | |
982 | c = READCHAR; | |
983 | if (c != '-') | |
984 | error ("Invalid escape character syntax"); | |
985 | c = READCHAR; | |
986 | if (c == '\\') | |
987 | c = read_escape (readcharfun); | |
988 | return c | hyper_modifier; | |
989 | ||
990 | case 'A': | |
991 | c = READCHAR; | |
992 | if (c != '-') | |
993 | error ("Invalid escape character syntax"); | |
994 | c = READCHAR; | |
995 | if (c == '\\') | |
996 | c = read_escape (readcharfun); | |
997 | return c | alt_modifier; | |
998 | ||
999 | case 's': | |
1000 | c = READCHAR; | |
1001 | if (c != '-') | |
1002 | error ("Invalid escape character syntax"); | |
1003 | c = READCHAR; | |
1004 | if (c == '\\') | |
1005 | c = read_escape (readcharfun); | |
1006 | return c | super_modifier; | |
078e7b4a JB |
1007 | |
1008 | case 'C': | |
1009 | c = READCHAR; | |
1010 | if (c != '-') | |
1011 | error ("Invalid escape character syntax"); | |
1012 | case '^': | |
1013 | c = READCHAR; | |
1014 | if (c == '\\') | |
1015 | c = read_escape (readcharfun); | |
f405a585 RS |
1016 | if ((c & 0177) == '?') |
1017 | return 0177 | c; | |
1018 | /* ASCII control chars are made from letters (both cases), | |
1019 | as well as the non-letters within 0100...0137. */ | |
1020 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1021 | return (c & (037 | ~0177)); | |
1022 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1023 | return (c & (037 | ~0177)); | |
078e7b4a | 1024 | else |
7bd279cd | 1025 | return c | ctrl_modifier; |
078e7b4a JB |
1026 | |
1027 | case '0': | |
1028 | case '1': | |
1029 | case '2': | |
1030 | case '3': | |
1031 | case '4': | |
1032 | case '5': | |
1033 | case '6': | |
1034 | case '7': | |
1035 | /* An octal escape, as in ANSI C. */ | |
1036 | { | |
1037 | register int i = c - '0'; | |
1038 | register int count = 0; | |
1039 | while (++count < 3) | |
1040 | { | |
1041 | if ((c = READCHAR) >= '0' && c <= '7') | |
1042 | { | |
1043 | i *= 8; | |
1044 | i += c - '0'; | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | UNREAD (c); | |
1049 | break; | |
1050 | } | |
1051 | } | |
1052 | return i; | |
1053 | } | |
1054 | ||
1055 | case 'x': | |
1056 | /* A hex escape, as in ANSI C. */ | |
1057 | { | |
1058 | int i = 0; | |
1059 | while (1) | |
1060 | { | |
1061 | c = READCHAR; | |
1062 | if (c >= '0' && c <= '9') | |
1063 | { | |
1064 | i *= 16; | |
1065 | i += c - '0'; | |
1066 | } | |
1067 | else if ((c >= 'a' && c <= 'f') | |
1068 | || (c >= 'A' && c <= 'F')) | |
1069 | { | |
1070 | i *= 16; | |
1071 | if (c >= 'a' && c <= 'f') | |
1072 | i += c - 'a' + 10; | |
1073 | else | |
1074 | i += c - 'A' + 10; | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | UNREAD (c); | |
1079 | break; | |
1080 | } | |
1081 | } | |
1082 | return i; | |
1083 | } | |
1084 | ||
1085 | default: | |
1086 | return c; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | static Lisp_Object | |
1091 | read1 (readcharfun) | |
1092 | register Lisp_Object readcharfun; | |
1093 | { | |
1094 | register int c; | |
1095 | ||
1096 | retry: | |
1097 | ||
1098 | c = READCHAR; | |
1099 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1100 | ||
1101 | switch (c) | |
1102 | { | |
1103 | case '(': | |
1104 | return read_list (0, readcharfun); | |
1105 | ||
1106 | case '[': | |
1107 | return read_vector (readcharfun); | |
1108 | ||
1109 | case ')': | |
1110 | case ']': | |
078e7b4a JB |
1111 | { |
1112 | register Lisp_Object val; | |
1113 | XSET (val, Lisp_Internal, c); | |
1114 | return val; | |
1115 | } | |
1116 | ||
1117 | case '#': | |
200f684e RS |
1118 | c = READCHAR; |
1119 | if (c == '[') | |
1120 | { | |
1121 | /* Accept compiled functions at read-time so that we don't have to | |
1122 | build them using function calls. */ | |
748ef62f RS |
1123 | Lisp_Object tmp; |
1124 | tmp = read_vector (readcharfun); | |
1125 | return Fmake_byte_code (XVECTOR (tmp)->size, | |
1126 | XVECTOR (tmp)->contents); | |
200f684e | 1127 | } |
748ef62f RS |
1128 | #ifdef USE_TEXT_PROPERTIES |
1129 | if (c == '(') | |
1130 | { | |
1131 | Lisp_Object tmp; | |
1132 | struct gcpro gcpro1; | |
1133 | ||
1134 | /* Read the string itself. */ | |
1135 | tmp = read1 (readcharfun); | |
1136 | if (XTYPE (tmp) != Lisp_String) | |
1137 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); | |
1138 | GCPRO1 (tmp); | |
1139 | /* Read the intervals and their properties. */ | |
1140 | while (1) | |
1141 | { | |
1142 | Lisp_Object beg, end, plist; | |
1143 | ||
1144 | beg = read1 (readcharfun); | |
1145 | if (XTYPE (beg) == Lisp_Internal) | |
1146 | { | |
1147 | if (XINT (beg) == ')') | |
1148 | break; | |
1149 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("invalid string property list", 28), Qnil)); | |
1150 | } | |
1151 | end = read1 (readcharfun); | |
1152 | if (XTYPE (end) == Lisp_Internal) | |
1153 | Fsignal (Qinvalid_read_syntax, | |
1154 | Fcons (make_string ("invalid string property list", 28), Qnil)); | |
1155 | ||
1156 | plist = read1 (readcharfun); | |
1157 | if (XTYPE (plist) == Lisp_Internal) | |
1158 | Fsignal (Qinvalid_read_syntax, | |
1159 | Fcons (make_string ("invalid string property list", 28), Qnil)); | |
1160 | Fset_text_properties (beg, end, plist, tmp); | |
1161 | } | |
1162 | UNGCPRO; | |
1163 | return tmp; | |
1164 | } | |
1165 | #endif | |
200f684e | 1166 | UNREAD (c); |
748ef62f | 1167 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
1168 | |
1169 | case ';': | |
1170 | while ((c = READCHAR) >= 0 && c != '\n'); | |
1171 | goto retry; | |
1172 | ||
1173 | case '\'': | |
1174 | { | |
1175 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
1176 | } | |
1177 | ||
1178 | case '?': | |
1179 | { | |
1180 | register Lisp_Object val; | |
1181 | ||
1182 | c = READCHAR; | |
1183 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1184 | ||
1185 | if (c == '\\') | |
1186 | XSET (val, Lisp_Int, read_escape (readcharfun)); | |
1187 | else | |
1188 | XSET (val, Lisp_Int, c); | |
1189 | ||
1190 | return val; | |
1191 | } | |
1192 | ||
1193 | case '\"': | |
1194 | { | |
1195 | register char *p = read_buffer; | |
1196 | register char *end = read_buffer + read_buffer_size; | |
1197 | register int c; | |
1198 | int cancel = 0; | |
1199 | ||
1200 | while ((c = READCHAR) >= 0 | |
1201 | && c != '\"') | |
1202 | { | |
1203 | if (p == end) | |
1204 | { | |
1205 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1206 | p += new - read_buffer; | |
1207 | read_buffer += new - read_buffer; | |
1208 | end = read_buffer + read_buffer_size; | |
1209 | } | |
1210 | if (c == '\\') | |
1211 | c = read_escape (readcharfun); | |
1212 | /* c is -1 if \ newline has just been seen */ | |
f405a585 | 1213 | if (c == -1) |
078e7b4a JB |
1214 | { |
1215 | if (p == read_buffer) | |
1216 | cancel = 1; | |
1217 | } | |
1218 | else | |
f943104a KH |
1219 | { |
1220 | if (c & CHAR_META) | |
1221 | /* Move the meta bit to the right place for a string. */ | |
1222 | c = (c & ~CHAR_META) | 0x80; | |
1223 | if (c & ~0xff) | |
1224 | error ("Invalid modifier in string"); | |
1225 | *p++ = c; | |
1226 | } | |
078e7b4a JB |
1227 | } |
1228 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1229 | ||
1230 | /* If purifying, and string starts with \ newline, | |
1231 | return zero instead. This is for doc strings | |
08564963 | 1232 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 1233 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
1234 | return make_number (0); |
1235 | ||
1236 | if (read_pure) | |
1237 | return make_pure_string (read_buffer, p - read_buffer); | |
1238 | else | |
1239 | return make_string (read_buffer, p - read_buffer); | |
1240 | } | |
1241 | ||
109d300c JB |
1242 | case '.': |
1243 | { | |
1244 | #ifdef LISP_FLOAT_TYPE | |
1245 | /* If a period is followed by a number, then we should read it | |
1246 | as a floating point number. Otherwise, it denotes a dotted | |
1247 | pair. */ | |
1248 | int next_char = READCHAR; | |
1249 | UNREAD (next_char); | |
1250 | ||
1251 | if (! isdigit (next_char)) | |
1252 | #endif | |
1253 | { | |
1254 | register Lisp_Object val; | |
1255 | XSET (val, Lisp_Internal, c); | |
1256 | return val; | |
1257 | } | |
1258 | ||
1259 | /* Otherwise, we fall through! Note that the atom-reading loop | |
1260 | below will now loop at least once, assuring that we will not | |
1261 | try to UNREAD two characters in a row. */ | |
1262 | } | |
078e7b4a JB |
1263 | default: |
1264 | if (c <= 040) goto retry; | |
1265 | { | |
1266 | register char *p = read_buffer; | |
481c6336 | 1267 | int quoted = 0; |
078e7b4a JB |
1268 | |
1269 | { | |
1270 | register char *end = read_buffer + read_buffer_size; | |
1271 | ||
1272 | while (c > 040 && | |
1273 | !(c == '\"' || c == '\'' || c == ';' || c == '?' | |
1274 | || c == '(' || c == ')' | |
109d300c JB |
1275 | #ifndef LISP_FLOAT_TYPE |
1276 | /* If we have floating-point support, then we need | |
1277 | to allow <digits><dot><digits>. */ | |
078e7b4a JB |
1278 | || c =='.' |
1279 | #endif /* not LISP_FLOAT_TYPE */ | |
1280 | || c == '[' || c == ']' || c == '#' | |
1281 | )) | |
1282 | { | |
1283 | if (p == end) | |
1284 | { | |
1285 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1286 | p += new - read_buffer; | |
1287 | read_buffer += new - read_buffer; | |
1288 | end = read_buffer + read_buffer_size; | |
1289 | } | |
1290 | if (c == '\\') | |
481c6336 RS |
1291 | { |
1292 | c = READCHAR; | |
1293 | quoted = 1; | |
1294 | } | |
078e7b4a JB |
1295 | *p++ = c; |
1296 | c = READCHAR; | |
1297 | } | |
1298 | ||
1299 | if (p == end) | |
1300 | { | |
1301 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1302 | p += new - read_buffer; | |
1303 | read_buffer += new - read_buffer; | |
1304 | /* end = read_buffer + read_buffer_size; */ | |
1305 | } | |
1306 | *p = 0; | |
1307 | if (c >= 0) | |
1308 | UNREAD (c); | |
1309 | } | |
1310 | ||
481c6336 RS |
1311 | if (!quoted) |
1312 | { | |
1313 | register char *p1; | |
1314 | register Lisp_Object val; | |
1315 | p1 = read_buffer; | |
1316 | if (*p1 == '+' || *p1 == '-') p1++; | |
1317 | /* Is it an integer? */ | |
1318 | if (p1 != p) | |
1319 | { | |
1320 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
dbc4e1c1 | 1321 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1322 | /* Integers can have trailing decimal points. */ |
1323 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
dbc4e1c1 | 1324 | #endif |
481c6336 RS |
1325 | if (p1 == p) |
1326 | /* It is an integer. */ | |
1327 | { | |
dbc4e1c1 | 1328 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1329 | if (p1[-1] == '.') |
1330 | p1[-1] = '\0'; | |
dbc4e1c1 | 1331 | #endif |
481c6336 RS |
1332 | XSET (val, Lisp_Int, atoi (read_buffer)); |
1333 | return val; | |
1334 | } | |
1335 | } | |
078e7b4a | 1336 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1337 | if (isfloat_string (read_buffer)) |
1338 | return make_float (atof (read_buffer)); | |
078e7b4a | 1339 | #endif |
481c6336 | 1340 | } |
078e7b4a JB |
1341 | |
1342 | return intern (read_buffer); | |
1343 | } | |
1344 | } | |
1345 | } | |
1346 | \f | |
1347 | #ifdef LISP_FLOAT_TYPE | |
1348 | ||
078e7b4a JB |
1349 | #define LEAD_INT 1 |
1350 | #define DOT_CHAR 2 | |
1351 | #define TRAIL_INT 4 | |
1352 | #define E_CHAR 8 | |
1353 | #define EXP_INT 16 | |
1354 | ||
1355 | int | |
1356 | isfloat_string (cp) | |
1357 | register char *cp; | |
1358 | { | |
1359 | register state; | |
1360 | ||
1361 | state = 0; | |
1362 | if (*cp == '+' || *cp == '-') | |
1363 | cp++; | |
1364 | ||
1365 | if (isdigit(*cp)) | |
1366 | { | |
1367 | state |= LEAD_INT; | |
1368 | while (isdigit (*cp)) | |
1369 | cp ++; | |
1370 | } | |
1371 | if (*cp == '.') | |
1372 | { | |
1373 | state |= DOT_CHAR; | |
1374 | cp++; | |
1375 | } | |
1376 | if (isdigit(*cp)) | |
1377 | { | |
1378 | state |= TRAIL_INT; | |
1379 | while (isdigit (*cp)) | |
1380 | cp++; | |
1381 | } | |
1382 | if (*cp == 'e') | |
1383 | { | |
1384 | state |= E_CHAR; | |
1385 | cp++; | |
1386 | } | |
1387 | if ((*cp == '+') || (*cp == '-')) | |
1388 | cp++; | |
1389 | ||
1390 | if (isdigit (*cp)) | |
1391 | { | |
1392 | state |= EXP_INT; | |
1393 | while (isdigit (*cp)) | |
1394 | cp++; | |
1395 | } | |
1396 | return (*cp == 0 | |
1397 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) | |
151bdc83 | 1398 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 1399 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
1400 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
1401 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a JB |
1402 | } |
1403 | #endif /* LISP_FLOAT_TYPE */ | |
1404 | \f | |
1405 | static Lisp_Object | |
1406 | read_vector (readcharfun) | |
1407 | Lisp_Object readcharfun; | |
1408 | { | |
1409 | register int i; | |
1410 | register int size; | |
1411 | register Lisp_Object *ptr; | |
1412 | register Lisp_Object tem, vector; | |
1413 | register struct Lisp_Cons *otem; | |
1414 | Lisp_Object len; | |
1415 | ||
1416 | tem = read_list (1, readcharfun); | |
1417 | len = Flength (tem); | |
1418 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
1419 | ||
1420 | ||
1421 | size = XVECTOR (vector)->size; | |
1422 | ptr = XVECTOR (vector)->contents; | |
1423 | for (i = 0; i < size; i++) | |
1424 | { | |
1425 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); | |
1426 | otem = XCONS (tem); | |
1427 | tem = Fcdr (tem); | |
1428 | free_cons (otem); | |
1429 | } | |
1430 | return vector; | |
1431 | } | |
1432 | ||
1433 | /* flag = 1 means check for ] to terminate rather than ) and . | |
1434 | flag = -1 means check for starting with defun | |
1435 | and make structure pure. */ | |
1436 | ||
1437 | static Lisp_Object | |
1438 | read_list (flag, readcharfun) | |
1439 | int flag; | |
1440 | register Lisp_Object readcharfun; | |
1441 | { | |
1442 | /* -1 means check next element for defun, | |
1443 | 0 means don't check, | |
1444 | 1 means already checked and found defun. */ | |
1445 | int defunflag = flag < 0 ? -1 : 0; | |
1446 | Lisp_Object val, tail; | |
1447 | register Lisp_Object elt, tem; | |
1448 | struct gcpro gcpro1, gcpro2; | |
1449 | ||
1450 | val = Qnil; | |
1451 | tail = Qnil; | |
1452 | ||
1453 | while (1) | |
1454 | { | |
1455 | GCPRO2 (val, tail); | |
1456 | elt = read1 (readcharfun); | |
1457 | UNGCPRO; | |
1458 | if (XTYPE (elt) == Lisp_Internal) | |
1459 | { | |
1460 | if (flag > 0) | |
1461 | { | |
1462 | if (XINT (elt) == ']') | |
1463 | return val; | |
1464 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (") or . in a vector", 18), Qnil)); | |
1465 | } | |
1466 | if (XINT (elt) == ')') | |
1467 | return val; | |
1468 | if (XINT (elt) == '.') | |
1469 | { | |
1470 | GCPRO2 (val, tail); | |
265a9e55 | 1471 | if (!NILP (tail)) |
078e7b4a JB |
1472 | XCONS (tail)->cdr = read0 (readcharfun); |
1473 | else | |
1474 | val = read0 (readcharfun); | |
1475 | elt = read1 (readcharfun); | |
1476 | UNGCPRO; | |
1477 | if (XTYPE (elt) == Lisp_Internal && XINT (elt) == ')') | |
1478 | return val; | |
1479 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); | |
1480 | } | |
1481 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
1482 | } | |
1483 | tem = (read_pure && flag <= 0 | |
1484 | ? pure_cons (elt, Qnil) | |
1485 | : Fcons (elt, Qnil)); | |
265a9e55 | 1486 | if (!NILP (tail)) |
078e7b4a JB |
1487 | XCONS (tail)->cdr = tem; |
1488 | else | |
1489 | val = tem; | |
1490 | tail = tem; | |
1491 | if (defunflag < 0) | |
1492 | defunflag = EQ (elt, Qdefun); | |
1493 | else if (defunflag > 0) | |
1494 | read_pure = 1; | |
1495 | } | |
1496 | } | |
1497 | \f | |
1498 | Lisp_Object Vobarray; | |
1499 | Lisp_Object initial_obarray; | |
1500 | ||
1501 | Lisp_Object | |
1502 | check_obarray (obarray) | |
1503 | Lisp_Object obarray; | |
1504 | { | |
1505 | while (XTYPE (obarray) != Lisp_Vector || XVECTOR (obarray)->size == 0) | |
1506 | { | |
1507 | /* If Vobarray is now invalid, force it to be valid. */ | |
1508 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
1509 | ||
1510 | obarray = wrong_type_argument (Qvectorp, obarray); | |
1511 | } | |
1512 | return obarray; | |
1513 | } | |
1514 | ||
1515 | static int hash_string (); | |
1516 | Lisp_Object oblookup (); | |
1517 | ||
1518 | Lisp_Object | |
1519 | intern (str) | |
1520 | char *str; | |
1521 | { | |
1522 | Lisp_Object tem; | |
1523 | int len = strlen (str); | |
153a17b7 | 1524 | Lisp_Object obarray; |
078e7b4a | 1525 | |
153a17b7 | 1526 | obarray = Vobarray; |
078e7b4a JB |
1527 | if (XTYPE (obarray) != Lisp_Vector || XVECTOR (obarray)->size == 0) |
1528 | obarray = check_obarray (obarray); | |
1529 | tem = oblookup (obarray, str, len); | |
1530 | if (XTYPE (tem) == Lisp_Symbol) | |
1531 | return tem; | |
265a9e55 | 1532 | return Fintern ((!NILP (Vpurify_flag) |
078e7b4a JB |
1533 | ? make_pure_string (str, len) |
1534 | : make_string (str, len)), | |
1535 | obarray); | |
1536 | } | |
1537 | ||
1538 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, | |
1539 | "Return the canonical symbol whose name is STRING.\n\ | |
1540 | If there is none, one is created by this function and returned.\n\ | |
1541 | A second optional argument specifies the obarray to use;\n\ | |
1542 | it defaults to the value of `obarray'.") | |
1543 | (str, obarray) | |
1544 | Lisp_Object str, obarray; | |
1545 | { | |
1546 | register Lisp_Object tem, sym, *ptr; | |
1547 | ||
265a9e55 | 1548 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1549 | obarray = check_obarray (obarray); |
1550 | ||
1551 | CHECK_STRING (str, 0); | |
1552 | ||
1553 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
1554 | if (XTYPE (tem) != Lisp_Int) | |
1555 | return tem; | |
1556 | ||
265a9e55 | 1557 | if (!NILP (Vpurify_flag)) |
078e7b4a JB |
1558 | str = Fpurecopy (str); |
1559 | sym = Fmake_symbol (str); | |
1560 | ||
1561 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; | |
1562 | if (XTYPE (*ptr) == Lisp_Symbol) | |
1563 | XSYMBOL (sym)->next = XSYMBOL (*ptr); | |
1564 | else | |
1565 | XSYMBOL (sym)->next = 0; | |
1566 | *ptr = sym; | |
1567 | return sym; | |
1568 | } | |
1569 | ||
1570 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
1571 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ | |
1572 | A second optional argument specifies the obarray to use;\n\ | |
1573 | it defaults to the value of `obarray'.") | |
1574 | (str, obarray) | |
1575 | Lisp_Object str, obarray; | |
1576 | { | |
1577 | register Lisp_Object tem; | |
1578 | ||
265a9e55 | 1579 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1580 | obarray = check_obarray (obarray); |
1581 | ||
1582 | CHECK_STRING (str, 0); | |
1583 | ||
1584 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
1585 | if (XTYPE (tem) != Lisp_Int) | |
1586 | return tem; | |
1587 | return Qnil; | |
1588 | } | |
1589 | ||
1590 | Lisp_Object | |
1591 | oblookup (obarray, ptr, size) | |
1592 | Lisp_Object obarray; | |
1593 | register char *ptr; | |
1594 | register int size; | |
1595 | { | |
1596 | int hash, obsize; | |
1597 | register Lisp_Object tail; | |
1598 | Lisp_Object bucket, tem; | |
1599 | ||
7c79a684 RS |
1600 | if (XTYPE (obarray) != Lisp_Vector |
1601 | || (obsize = XVECTOR (obarray)->size) == 0) | |
078e7b4a JB |
1602 | { |
1603 | obarray = check_obarray (obarray); | |
1604 | obsize = XVECTOR (obarray)->size; | |
1605 | } | |
1606 | /* Combining next two lines breaks VMS C 2.3. */ | |
1607 | hash = hash_string (ptr, size); | |
1608 | hash %= obsize; | |
1609 | bucket = XVECTOR (obarray)->contents[hash]; | |
1610 | if (XFASTINT (bucket) == 0) | |
1611 | ; | |
1612 | else if (XTYPE (bucket) != Lisp_Symbol) | |
1613 | error ("Bad data in guts of obarray"); /* Like CADR error message */ | |
1614 | else for (tail = bucket; ; XSET (tail, Lisp_Symbol, XSYMBOL (tail)->next)) | |
1615 | { | |
1616 | if (XSYMBOL (tail)->name->size == size && | |
1617 | !bcmp (XSYMBOL (tail)->name->data, ptr, size)) | |
1618 | return tail; | |
1619 | else if (XSYMBOL (tail)->next == 0) | |
1620 | break; | |
1621 | } | |
1622 | XSET (tem, Lisp_Int, hash); | |
1623 | return tem; | |
1624 | } | |
1625 | ||
1626 | static int | |
1627 | hash_string (ptr, len) | |
1628 | unsigned char *ptr; | |
1629 | int len; | |
1630 | { | |
1631 | register unsigned char *p = ptr; | |
1632 | register unsigned char *end = p + len; | |
1633 | register unsigned char c; | |
1634 | register int hash = 0; | |
1635 | ||
1636 | while (p != end) | |
1637 | { | |
1638 | c = *p++; | |
1639 | if (c >= 0140) c -= 40; | |
1640 | hash = ((hash<<3) + (hash>>28) + c); | |
1641 | } | |
1642 | return hash & 07777777777; | |
1643 | } | |
1644 | ||
1645 | void | |
1646 | map_obarray (obarray, fn, arg) | |
1647 | Lisp_Object obarray; | |
1648 | int (*fn) (); | |
1649 | Lisp_Object arg; | |
1650 | { | |
1651 | register int i; | |
1652 | register Lisp_Object tail; | |
1653 | CHECK_VECTOR (obarray, 1); | |
1654 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) | |
1655 | { | |
1656 | tail = XVECTOR (obarray)->contents[i]; | |
1657 | if (XFASTINT (tail) != 0) | |
1658 | while (1) | |
1659 | { | |
1660 | (*fn) (tail, arg); | |
1661 | if (XSYMBOL (tail)->next == 0) | |
1662 | break; | |
1663 | XSET (tail, Lisp_Symbol, XSYMBOL (tail)->next); | |
1664 | } | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | mapatoms_1 (sym, function) | |
1669 | Lisp_Object sym, function; | |
1670 | { | |
1671 | call1 (function, sym); | |
1672 | } | |
1673 | ||
1674 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
1675 | "Call FUNCTION on every symbol in OBARRAY.\n\ | |
1676 | OBARRAY defaults to the value of `obarray'.") | |
1677 | (function, obarray) | |
1678 | Lisp_Object function, obarray; | |
1679 | { | |
1680 | Lisp_Object tem; | |
1681 | ||
265a9e55 | 1682 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1683 | obarray = check_obarray (obarray); |
1684 | ||
1685 | map_obarray (obarray, mapatoms_1, function); | |
1686 | return Qnil; | |
1687 | } | |
1688 | ||
5e88a39e | 1689 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
1690 | |
1691 | void | |
1692 | init_obarray () | |
1693 | { | |
1694 | Lisp_Object oblength; | |
1695 | int hash; | |
1696 | Lisp_Object *tem; | |
1697 | ||
1698 | XFASTINT (oblength) = OBARRAY_SIZE; | |
1699 | ||
1700 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); | |
1701 | Vobarray = Fmake_vector (oblength, make_number (0)); | |
1702 | initial_obarray = Vobarray; | |
1703 | staticpro (&initial_obarray); | |
1704 | /* Intern nil in the obarray */ | |
1705 | /* These locals are to kludge around a pyramid compiler bug. */ | |
1706 | hash = hash_string ("nil", 3); | |
1707 | /* Separate statement here to avoid VAXC bug. */ | |
1708 | hash %= OBARRAY_SIZE; | |
1709 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
1710 | *tem = Qnil; | |
1711 | ||
1712 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); | |
1713 | XSYMBOL (Qnil)->function = Qunbound; | |
1714 | XSYMBOL (Qunbound)->value = Qunbound; | |
1715 | XSYMBOL (Qunbound)->function = Qunbound; | |
1716 | ||
1717 | Qt = intern ("t"); | |
1718 | XSYMBOL (Qnil)->value = Qnil; | |
1719 | XSYMBOL (Qnil)->plist = Qnil; | |
1720 | XSYMBOL (Qt)->value = Qt; | |
1721 | ||
1722 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
1723 | Vpurify_flag = Qt; | |
1724 | ||
1725 | Qvariable_documentation = intern ("variable-documentation"); | |
1726 | ||
1727 | read_buffer_size = 100; | |
1728 | read_buffer = (char *) malloc (read_buffer_size); | |
1729 | } | |
1730 | \f | |
1731 | void | |
1732 | defsubr (sname) | |
1733 | struct Lisp_Subr *sname; | |
1734 | { | |
1735 | Lisp_Object sym; | |
1736 | sym = intern (sname->symbol_name); | |
1737 | XSET (XSYMBOL (sym)->function, Lisp_Subr, sname); | |
1738 | } | |
1739 | ||
1740 | #ifdef NOTDEF /* use fset in subr.el now */ | |
1741 | void | |
1742 | defalias (sname, string) | |
1743 | struct Lisp_Subr *sname; | |
1744 | char *string; | |
1745 | { | |
1746 | Lisp_Object sym; | |
1747 | sym = intern (string); | |
1748 | XSET (XSYMBOL (sym)->function, Lisp_Subr, sname); | |
1749 | } | |
1750 | #endif /* NOTDEF */ | |
1751 | ||
1752 | /* New replacement for DefIntVar; it ignores the doc string argument | |
1753 | on the assumption that make-docfile will handle that. */ | |
1754 | /* Define an "integer variable"; a symbol whose value is forwarded | |
1755 | to a C variable of type int. Sample call: */ | |
1756 | /* DEFVARINT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ | |
1757 | ||
1758 | void | |
1759 | defvar_int (namestring, address, doc) | |
1760 | char *namestring; | |
1761 | int *address; | |
1762 | char *doc; | |
1763 | { | |
1764 | Lisp_Object sym; | |
1765 | sym = intern (namestring); | |
1766 | XSET (XSYMBOL (sym)->value, Lisp_Intfwd, address); | |
1767 | } | |
1768 | ||
1769 | /* Similar but define a variable whose value is T if address contains 1, | |
1770 | NIL if address contains 0 */ | |
1771 | ||
1772 | void | |
1773 | defvar_bool (namestring, address, doc) | |
1774 | char *namestring; | |
1775 | int *address; | |
1776 | char *doc; | |
1777 | { | |
1778 | Lisp_Object sym; | |
1779 | sym = intern (namestring); | |
1780 | XSET (XSYMBOL (sym)->value, Lisp_Boolfwd, address); | |
1781 | } | |
1782 | ||
1783 | /* Similar but define a variable whose value is the Lisp Object stored at address. */ | |
1784 | ||
1785 | void | |
1786 | defvar_lisp (namestring, address, doc) | |
1787 | char *namestring; | |
1788 | Lisp_Object *address; | |
1789 | char *doc; | |
1790 | { | |
1791 | Lisp_Object sym; | |
1792 | sym = intern (namestring); | |
1793 | XSET (XSYMBOL (sym)->value, Lisp_Objfwd, address); | |
1794 | staticpro (address); | |
1795 | } | |
1796 | ||
1797 | /* Similar but don't request gc-marking of the C variable. | |
1798 | Used when that variable will be gc-marked for some other reason, | |
1799 | since marking the same slot twice can cause trouble with strings. */ | |
1800 | ||
1801 | void | |
1802 | defvar_lisp_nopro (namestring, address, doc) | |
1803 | char *namestring; | |
1804 | Lisp_Object *address; | |
1805 | char *doc; | |
1806 | { | |
1807 | Lisp_Object sym; | |
1808 | sym = intern (namestring); | |
1809 | XSET (XSYMBOL (sym)->value, Lisp_Objfwd, address); | |
1810 | } | |
1811 | ||
1812 | #ifndef standalone | |
1813 | ||
1814 | /* Similar but define a variable whose value is the Lisp Object stored in | |
1815 | the current buffer. address is the address of the slot in the buffer that is current now. */ | |
1816 | ||
1817 | void | |
4360b0c6 | 1818 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
1819 | char *namestring; |
1820 | Lisp_Object *address; | |
4360b0c6 | 1821 | Lisp_Object type; |
078e7b4a JB |
1822 | char *doc; |
1823 | { | |
1824 | Lisp_Object sym; | |
1825 | int offset; | |
1826 | extern struct buffer buffer_local_symbols; | |
1827 | ||
1828 | sym = intern (namestring); | |
1829 | offset = (char *)address - (char *)current_buffer; | |
1830 | ||
1831 | XSET (XSYMBOL (sym)->value, Lisp_Buffer_Objfwd, | |
1832 | (Lisp_Object *) offset); | |
1833 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; | |
4360b0c6 | 1834 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
078e7b4a JB |
1835 | if (*(int *)(offset + (char *)&buffer_local_flags) == 0) |
1836 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
1837 | slot of buffer_local_flags */ | |
1838 | abort (); | |
1839 | } | |
1840 | ||
1841 | #endif /* standalone */ | |
1842 | \f | |
279499f0 | 1843 | init_lread () |
078e7b4a | 1844 | { |
46947372 | 1845 | char *normal; |
078e7b4a | 1846 | |
279499f0 | 1847 | /* Compute the default load-path. */ |
46947372 JB |
1848 | #ifdef CANNOT_DUMP |
1849 | normal = PATH_LOADSEARCH; | |
e065a56e | 1850 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
1851 | #else |
1852 | if (NILP (Vpurify_flag)) | |
1853 | normal = PATH_LOADSEARCH; | |
279499f0 | 1854 | else |
46947372 | 1855 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 1856 | |
46947372 JB |
1857 | /* In a dumped Emacs, we normally have to reset the value of |
1858 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
1859 | uses ../lisp, instead of the path of the installed elisp | |
1860 | libraries. However, if it appears that Vload_path was changed | |
1861 | from the default before dumping, don't override that value. */ | |
4746118a JB |
1862 | if (initialized) |
1863 | { | |
1864 | Lisp_Object dump_path; | |
46947372 | 1865 | |
e065a56e | 1866 | dump_path = decode_env_path (0, PATH_DUMPLOADSEARCH); |
4746118a | 1867 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
1868 | { |
1869 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 1870 | if (!NILP (Vinstallation_directory)) |
80667d53 | 1871 | { |
74180aa4 | 1872 | /* Add to the path the lisp subdir of the |
3a3056e5 RS |
1873 | installation dir, if it exists. */ |
1874 | Lisp_Object tem, tem1; | |
74180aa4 RS |
1875 | tem = Fexpand_file_name (build_string ("lisp"), |
1876 | Vinstallation_directory); | |
3a3056e5 RS |
1877 | tem1 = Ffile_exists_p (tem); |
1878 | if (!NILP (tem1)) | |
1879 | { | |
1880 | if (NILP (Fmember (tem, Vload_path))) | |
1881 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
1882 | } | |
1883 | else | |
1884 | /* That dir doesn't exist, so add the build-time | |
1885 | Lisp dirs instead. */ | |
1886 | Vload_path = nconc2 (Vload_path, dump_path); | |
80667d53 RS |
1887 | } |
1888 | } | |
4746118a JB |
1889 | } |
1890 | else | |
e065a56e | 1891 | Vload_path = decode_env_path (0, normal); |
46947372 | 1892 | #endif |
279499f0 | 1893 | |
078e7b4a | 1894 | /* Warn if dirs in the *standard* path don't exist. */ |
46947372 JB |
1895 | { |
1896 | Lisp_Object path_tail; | |
078e7b4a | 1897 | |
46947372 JB |
1898 | for (path_tail = Vload_path; |
1899 | !NILP (path_tail); | |
1900 | path_tail = XCONS (path_tail)->cdr) | |
1901 | { | |
1902 | Lisp_Object dirfile; | |
1903 | dirfile = Fcar (path_tail); | |
1904 | if (XTYPE (dirfile) == Lisp_String) | |
1905 | { | |
1906 | dirfile = Fdirectory_file_name (dirfile); | |
1907 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
3a3056e5 RS |
1908 | fprintf (stderr, |
1909 | "Warning: Lisp directory `%s' does not exist.\n", | |
3917910a | 1910 | XSTRING (Fcar (path_tail))->data); |
46947372 JB |
1911 | } |
1912 | } | |
1913 | } | |
1914 | ||
1915 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
1916 | This doesn't apply if we're dumping. */ | |
1917 | if (NILP (Vpurify_flag) | |
1918 | && egetenv ("EMACSLOADPATH")) | |
279499f0 | 1919 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
1920 | |
1921 | Vvalues = Qnil; | |
1922 | ||
078e7b4a | 1923 | load_in_progress = 0; |
d2c6be7f RS |
1924 | |
1925 | load_descriptor_list = Qnil; | |
078e7b4a JB |
1926 | } |
1927 | ||
1928 | void | |
279499f0 | 1929 | syms_of_lread () |
078e7b4a JB |
1930 | { |
1931 | defsubr (&Sread); | |
1932 | defsubr (&Sread_from_string); | |
1933 | defsubr (&Sintern); | |
1934 | defsubr (&Sintern_soft); | |
1935 | defsubr (&Sload); | |
228d4b1c | 1936 | defsubr (&Seval_buffer); |
078e7b4a JB |
1937 | defsubr (&Seval_region); |
1938 | defsubr (&Sread_char); | |
1939 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 1940 | defsubr (&Sread_event); |
078e7b4a JB |
1941 | defsubr (&Sget_file_char); |
1942 | defsubr (&Smapatoms); | |
1943 | ||
1944 | DEFVAR_LISP ("obarray", &Vobarray, | |
1945 | "Symbol table for use by `intern' and `read'.\n\ | |
1946 | It is a vector whose length ought to be prime for best results.\n\ | |
1947 | The vector's contents don't make sense if examined from Lisp programs;\n\ | |
1948 | to find all the symbols in an obarray, use `mapatoms'."); | |
1949 | ||
1950 | DEFVAR_LISP ("values", &Vvalues, | |
1951 | "List of values of all expressions which were read, evaluated and printed.\n\ | |
1952 | Order is reverse chronological."); | |
1953 | ||
1954 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
1955 | "Stream for read to get input from.\n\ | |
1956 | See documentation of `read' for possible values."); | |
1957 | Vstandard_input = Qt; | |
1958 | ||
1959 | DEFVAR_LISP ("load-path", &Vload_path, | |
1960 | "*List of directories to search for files to load.\n\ | |
1961 | Each element is a string (directory name) or nil (try default directory).\n\ | |
1962 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ | |
692f86ad | 1963 | otherwise to default specified by file `paths.h' when Emacs was built."); |
078e7b4a JB |
1964 | |
1965 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, | |
1966 | "Non-nil iff inside of `load'."); | |
1967 | ||
1968 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
1969 | "An alist of expressions to be evalled when particular files are loaded.\n\ | |
1970 | Each element looks like (FILENAME FORMS...).\n\ | |
1971 | When `load' is run and the file-name argument is FILENAME,\n\ | |
1972 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ | |
1973 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ | |
1974 | with no directory specified, since that is how `load' is normally called.\n\ | |
1975 | An error in FORMS does not undo the load,\n\ | |
1976 | but does prevent execution of the rest of the FORMS."); | |
1977 | Vafter_load_alist = Qnil; | |
1978 | ||
ae321d28 RS |
1979 | DEFVAR_LISP ("load-history", &Vload_history, |
1980 | "Alist mapping source file names to symbols and features.\n\ | |
1981 | Each alist element is a list that starts with a file name,\n\ | |
1982 | except for one element (optional) that starts with nil and describes\n\ | |
1983 | definitions evaluated from buffers not visiting files.\n\ | |
1984 | The remaining elements of each list are symbols defined as functions\n\ | |
1985 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); | |
1986 | Vload_history = Qnil; | |
1987 | ||
8a1f1537 RS |
1988 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
1989 | "Used for internal purposes by `load'."); | |
ae321d28 RS |
1990 | Vcurrent_load_list = Qnil; |
1991 | ||
d2c6be7f RS |
1992 | load_descriptor_list = Qnil; |
1993 | staticpro (&load_descriptor_list); | |
1994 | ||
8a1f1537 RS |
1995 | Qcurrent_load_list = intern ("current-load-list"); |
1996 | staticpro (&Qcurrent_load_list); | |
1997 | ||
078e7b4a JB |
1998 | Qstandard_input = intern ("standard-input"); |
1999 | staticpro (&Qstandard_input); | |
2000 | ||
2001 | Qread_char = intern ("read-char"); | |
2002 | staticpro (&Qread_char); | |
2003 | ||
2004 | Qget_file_char = intern ("get-file-char"); | |
2005 | staticpro (&Qget_file_char); | |
7bd279cd RS |
2006 | |
2007 | Qascii_character = intern ("ascii-character"); | |
2008 | staticpro (&Qascii_character); | |
c2225d00 RS |
2009 | |
2010 | Qload = intern ("load"); | |
2011 | staticpro (&Qload); | |
078e7b4a | 2012 | } |