Commit | Line | Data |
---|---|---|
078e7b4a | 1 | /* Lisp parsing and input streams. |
73aa9704 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, |
3a22ee35 | 3 | 1993, 1994 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 | ||
98280b76 | 22 | #include <config.h> |
078e7b4a JB |
23 | #include <stdio.h> |
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/file.h> | |
2c1b5dbe | 27 | #include <errno.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 | 50 | |
23a71bd6 | 51 | #ifdef MSDOS |
7df5cd28 | 52 | #include "msdos.h" |
6ba93f9d | 53 | /* These are redefined (correctly, but differently) in values.h. */ |
23a71bd6 RS |
54 | #undef INTBITS |
55 | #undef LONGBITS | |
56 | #undef SHORTBITS | |
57 | #endif | |
23a71bd6 | 58 | |
078e7b4a JB |
59 | #include <math.h> |
60 | #endif /* LISP_FLOAT_TYPE */ | |
61 | ||
f7d279f0 RS |
62 | #ifndef O_RDONLY |
63 | #define O_RDONLY 0 | |
64 | #endif | |
65 | ||
2c1b5dbe KH |
66 | extern int errno; |
67 | ||
8a1f1537 | 68 | Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list; |
078e7b4a | 69 | Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist; |
c2225d00 | 70 | Lisp_Object Qascii_character, Qload; |
7bd279cd RS |
71 | |
72 | extern Lisp_Object Qevent_symbol_element_mask; | |
078e7b4a JB |
73 | |
74 | /* non-zero if inside `load' */ | |
75 | int load_in_progress; | |
76 | ||
77 | /* Search path for files to be loaded. */ | |
78 | Lisp_Object Vload_path; | |
79 | ||
ae321d28 RS |
80 | /* This is the user-visible association list that maps features to |
81 | lists of defs in their load files. */ | |
82 | Lisp_Object Vload_history; | |
83 | ||
84 | /* This is useud to build the load history. */ | |
85 | Lisp_Object Vcurrent_load_list; | |
86 | ||
d2c6be7f RS |
87 | /* List of descriptors now open for Fload. */ |
88 | static Lisp_Object load_descriptor_list; | |
89 | ||
078e7b4a JB |
90 | /* File for get_file_char to read from. Use by load */ |
91 | static FILE *instream; | |
92 | ||
93 | /* When nonzero, read conses in pure space */ | |
94 | static int read_pure; | |
95 | ||
96 | /* For use within read-from-string (this reader is non-reentrant!!) */ | |
97 | static int read_from_string_index; | |
98 | static int read_from_string_limit; | |
99 | \f | |
100 | /* Handle unreading and rereading of characters. | |
101 | Write READCHAR to read a character, | |
102 | UNREAD(c) to unread c to be read again. */ | |
103 | ||
104 | #define READCHAR readchar (readcharfun) | |
105 | #define UNREAD(c) unreadchar (readcharfun, c) | |
106 | ||
107 | static int | |
108 | readchar (readcharfun) | |
109 | Lisp_Object readcharfun; | |
110 | { | |
111 | Lisp_Object tem; | |
112 | register struct buffer *inbuffer; | |
113 | register int c, mpos; | |
114 | ||
cfff016d | 115 | if (BUFFERP (readcharfun)) |
078e7b4a JB |
116 | { |
117 | inbuffer = XBUFFER (readcharfun); | |
118 | ||
119 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) | |
120 | return -1; | |
121 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); | |
122 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); | |
123 | ||
124 | return c; | |
125 | } | |
cfff016d | 126 | if (MARKERP (readcharfun)) |
078e7b4a JB |
127 | { |
128 | inbuffer = XMARKER (readcharfun)->buffer; | |
129 | ||
130 | mpos = marker_position (readcharfun); | |
131 | ||
132 | if (mpos > BUF_ZV (inbuffer) - 1) | |
133 | return -1; | |
134 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); | |
135 | if (mpos != BUF_GPT (inbuffer)) | |
136 | XMARKER (readcharfun)->bufpos++; | |
137 | else | |
138 | Fset_marker (readcharfun, make_number (mpos + 1), | |
139 | Fmarker_buffer (readcharfun)); | |
140 | return c; | |
141 | } | |
142 | if (EQ (readcharfun, Qget_file_char)) | |
2c1b5dbe KH |
143 | { |
144 | c = getc (instream); | |
145 | #ifdef EINTR | |
146 | /* Interrupted reads have been observed while reading over the network */ | |
147 | while (c == EOF && ferror (instream) && errno == EINTR) | |
148 | { | |
149 | clearerr (instream); | |
150 | c = getc (instream); | |
151 | } | |
152 | #endif | |
153 | return c; | |
154 | } | |
078e7b4a | 155 | |
cfff016d | 156 | if (STRINGP (readcharfun)) |
078e7b4a JB |
157 | { |
158 | register int c; | |
159 | /* This used to be return of a conditional expression, | |
160 | but that truncated -1 to a char on VMS. */ | |
161 | if (read_from_string_index < read_from_string_limit) | |
162 | c = XSTRING (readcharfun)->data[read_from_string_index++]; | |
163 | else | |
164 | c = -1; | |
165 | return c; | |
166 | } | |
167 | ||
168 | tem = call0 (readcharfun); | |
169 | ||
265a9e55 | 170 | if (NILP (tem)) |
078e7b4a JB |
171 | return -1; |
172 | return XINT (tem); | |
173 | } | |
174 | ||
175 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
176 | If the stream is a user function, call it with the char as argument. */ | |
177 | ||
178 | static void | |
179 | unreadchar (readcharfun, c) | |
180 | Lisp_Object readcharfun; | |
181 | int c; | |
182 | { | |
92fddec9 KH |
183 | if (c == -1) |
184 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
185 | since readchar didn't advance it when we read it. */ | |
186 | ; | |
cfff016d | 187 | else if (BUFFERP (readcharfun)) |
078e7b4a JB |
188 | { |
189 | if (XBUFFER (readcharfun) == current_buffer) | |
190 | SET_PT (point - 1); | |
191 | else | |
192 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
193 | } | |
cfff016d | 194 | else if (MARKERP (readcharfun)) |
078e7b4a | 195 | XMARKER (readcharfun)->bufpos--; |
cfff016d | 196 | else if (STRINGP (readcharfun)) |
078e7b4a JB |
197 | read_from_string_index--; |
198 | else if (EQ (readcharfun, Qget_file_char)) | |
199 | ungetc (c, instream); | |
200 | else | |
201 | call1 (readcharfun, make_number (c)); | |
202 | } | |
203 | ||
204 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
205 | \f | |
206 | /* get a character from the tty */ | |
207 | ||
3d9b22be JB |
208 | extern Lisp_Object read_char (); |
209 | ||
f42be754 JB |
210 | /* Read input events until we get one that's acceptable for our purposes. |
211 | ||
212 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
213 | until we get a character we like, and then stuffed into | |
214 | unread_switch_frame. | |
215 | ||
216 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
217 | if the unmodified version of the symbol has a Qascii_character | |
218 | property, and use that character, if present. | |
219 | ||
220 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
221 | get isn't an ASCII character with modifiers. If it's zero but | |
222 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
223 | character. */ | |
224 | Lisp_Object | |
225 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) | |
226 | int no_switch_frame, ascii_required, error_nonascii; | |
227 | { | |
228 | #ifdef standalone | |
229 | return make_number (getchar ()); | |
230 | #else | |
153a17b7 KH |
231 | register Lisp_Object val, delayed_switch_frame; |
232 | ||
233 | delayed_switch_frame = Qnil; | |
f42be754 JB |
234 | |
235 | /* Read until we get an acceptable event. */ | |
236 | retry: | |
237 | val = read_char (0, 0, 0, Qnil, 0); | |
238 | ||
cfff016d | 239 | if (BUFFERP (val)) |
6c82d689 KH |
240 | goto retry; |
241 | ||
f42be754 JB |
242 | /* switch-frame events are put off until after the next ASCII |
243 | character. This is better than signalling an error just because | |
244 | the last characters were typed to a separate minibuffer frame, | |
245 | for example. Eventually, some code which can deal with | |
246 | switch-frame events will read it and process it. */ | |
247 | if (no_switch_frame | |
248 | && EVENT_HAS_PARAMETERS (val) | |
249 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
250 | { | |
251 | delayed_switch_frame = val; | |
252 | goto retry; | |
253 | } | |
254 | ||
255 | if (ascii_required) | |
256 | { | |
257 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 258 | if (SYMBOLP (val)) |
f42be754 JB |
259 | { |
260 | Lisp_Object tem, tem1, tem2; | |
261 | tem = Fget (val, Qevent_symbol_element_mask); | |
262 | if (!NILP (tem)) | |
263 | { | |
264 | tem1 = Fget (Fcar (tem), Qascii_character); | |
265 | /* Merge this symbol's modifier bits | |
266 | with the ASCII equivalent of its basic code. */ | |
267 | if (!NILP (tem1)) | |
baf69866 | 268 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
269 | } |
270 | } | |
271 | ||
272 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 273 | if (!INTEGERP (val)) |
f42be754 JB |
274 | { |
275 | if (error_nonascii) | |
276 | { | |
1ec84625 | 277 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
278 | error ("Non-character input-event"); |
279 | } | |
280 | else | |
281 | goto retry; | |
282 | } | |
283 | } | |
284 | ||
285 | if (! NILP (delayed_switch_frame)) | |
286 | unread_switch_frame = delayed_switch_frame; | |
287 | ||
288 | return val; | |
289 | #endif | |
290 | } | |
291 | ||
078e7b4a JB |
292 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
293 | "Read a character from the command input (keyboard or macro).\n\ | |
e51e47f7 JB |
294 | It is returned as a number.\n\ |
295 | If the user generates an event which is not a character (i.e. a mouse\n\ | |
e37c0805 JB |
296 | click or function key event), `read-char' signals an error. As an\n\ |
297 | exception, switch-frame events are put off until non-ASCII events can\n\ | |
298 | be read.\n\ | |
299 | If you want to read non-character events, or ignore them, call\n\ | |
300 | `read-event' or `read-char-exclusive' instead.") | |
078e7b4a JB |
301 | () |
302 | { | |
f42be754 | 303 | return read_filtered_event (1, 1, 1); |
078e7b4a JB |
304 | } |
305 | ||
078e7b4a JB |
306 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
307 | "Read an event object from the input stream.") | |
308 | () | |
309 | { | |
f42be754 | 310 | return read_filtered_event (0, 0, 0); |
078e7b4a JB |
311 | } |
312 | ||
313 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, | |
314 | "Read a character from the command input (keyboard or macro).\n\ | |
315 | It is returned as a number. Non character events are ignored.") | |
316 | () | |
317 | { | |
f42be754 | 318 | return read_filtered_event (1, 1, 0); |
078e7b4a | 319 | } |
078e7b4a JB |
320 | |
321 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
322 | "Don't use this yourself.") | |
323 | () | |
324 | { | |
325 | register Lisp_Object val; | |
1805de4f | 326 | XSETINT (val, getc (instream)); |
078e7b4a JB |
327 | return val; |
328 | } | |
329 | \f | |
330 | static void readevalloop (); | |
331 | static Lisp_Object load_unwind (); | |
d2c6be7f | 332 | static Lisp_Object load_descriptor_unwind (); |
078e7b4a JB |
333 | |
334 | DEFUN ("load", Fload, Sload, 1, 4, 0, | |
335 | "Execute a file of Lisp code named FILE.\n\ | |
336 | First try FILE with `.elc' appended, then try with `.el',\n\ | |
337 | then try FILE unmodified.\n\ | |
338 | This function searches the directories in `load-path'.\n\ | |
339 | If optional second arg NOERROR is non-nil,\n\ | |
340 | report no error if FILE doesn't exist.\n\ | |
341 | Print messages at start and end of loading unless\n\ | |
342 | optional third arg NOMESSAGE is non-nil.\n\ | |
343 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ | |
344 | suffixes `.elc' or `.el' to the specified name FILE.\n\ | |
345 | Return t if file exists.") | |
346 | (str, noerror, nomessage, nosuffix) | |
347 | Lisp_Object str, noerror, nomessage, nosuffix; | |
348 | { | |
349 | register FILE *stream; | |
350 | register int fd = -1; | |
351 | register Lisp_Object lispstream; | |
078e7b4a JB |
352 | int count = specpdl_ptr - specpdl; |
353 | Lisp_Object temp; | |
354 | struct gcpro gcpro1; | |
355 | Lisp_Object found; | |
51ac6f83 RS |
356 | /* 1 means inhibit the message at the beginning. */ |
357 | int nomessage1 = 0; | |
c2225d00 | 358 | Lisp_Object handler; |
317073d5 | 359 | #ifdef DOS_NT |
23a71bd6 | 360 | char *dosmode = "rt"; |
317073d5 | 361 | #endif /* DOS_NT */ |
078e7b4a JB |
362 | |
363 | CHECK_STRING (str, 0); | |
078e7b4a | 364 | |
c2225d00 | 365 | /* If file name is magic, call the handler. */ |
a617e913 | 366 | handler = Ffind_file_name_handler (str, Qload); |
c2225d00 | 367 | if (!NILP (handler)) |
8a2c760a | 368 | return call5 (handler, Qload, str, noerror, nomessage, nosuffix); |
c2225d00 | 369 | |
07a0bda3 RS |
370 | /* Do this after the handler to avoid |
371 | the need to gcpro noerror, nomessage and nosuffix. | |
372 | (Below here, we care only whether they are nil or not.) */ | |
373 | str = Fsubstitute_in_file_name (str); | |
374 | ||
078e7b4a JB |
375 | /* Avoid weird lossage with null string as arg, |
376 | since it would try to load a directory as a Lisp file */ | |
377 | if (XSTRING (str)->size > 0) | |
378 | { | |
5a6e5452 | 379 | GCPRO1 (str); |
265a9e55 | 380 | fd = openp (Vload_path, str, !NILP (nosuffix) ? "" : ".elc:.el:", |
078e7b4a | 381 | &found, 0); |
5a6e5452 | 382 | UNGCPRO; |
078e7b4a JB |
383 | } |
384 | ||
385 | if (fd < 0) | |
386 | { | |
265a9e55 | 387 | if (NILP (noerror)) |
078e7b4a JB |
388 | while (1) |
389 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
390 | Fcons (str, Qnil))); | |
391 | else | |
392 | return Qnil; | |
393 | } | |
394 | ||
395 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), | |
396 | ".elc", 4)) | |
397 | { | |
398 | struct stat s1, s2; | |
399 | int result; | |
400 | ||
317073d5 | 401 | #ifdef DOS_NT |
23a71bd6 | 402 | dosmode = "rb"; |
317073d5 | 403 | #endif /* DOS_NT */ |
4ff37b08 | 404 | stat ((char *)XSTRING (found)->data, &s1); |
078e7b4a | 405 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
4ff37b08 | 406 | result = stat ((char *)XSTRING (found)->data, &s2); |
078e7b4a | 407 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
51ac6f83 RS |
408 | { |
409 | message ("Source file `%s' newer than byte-compiled file", | |
410 | XSTRING (found)->data); | |
411 | /* Don't immediately overwrite this message. */ | |
412 | if (!noninteractive) | |
413 | nomessage1 = 1; | |
414 | } | |
078e7b4a JB |
415 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
416 | } | |
417 | ||
317073d5 | 418 | #ifdef DOS_NT |
23a71bd6 RS |
419 | close (fd); |
420 | stream = fopen ((char *) XSTRING (found)->data, dosmode); | |
317073d5 | 421 | #else /* not DOS_NT */ |
078e7b4a | 422 | stream = fdopen (fd, "r"); |
317073d5 | 423 | #endif /* not DOS_NT */ |
078e7b4a JB |
424 | if (stream == 0) |
425 | { | |
426 | close (fd); | |
427 | error ("Failure to create stdio stream for %s", XSTRING (str)->data); | |
428 | } | |
429 | ||
51ac6f83 | 430 | if (NILP (nomessage) && !nomessage1) |
078e7b4a JB |
431 | message ("Loading %s...", XSTRING (str)->data); |
432 | ||
433 | GCPRO1 (str); | |
838abf56 KH |
434 | lispstream = Fcons (Qnil, Qnil); |
435 | XSETFASTINT (XCONS (lispstream)->car, (EMACS_UINT)stream >> 16); | |
436 | XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 437 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f RS |
438 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
439 | load_descriptor_list | |
440 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 441 | load_in_progress++; |
ae321d28 | 442 | readevalloop (Qget_file_char, stream, str, Feval, 0); |
078e7b4a JB |
443 | unbind_to (count, Qnil); |
444 | ||
445 | /* Run any load-hooks for this file. */ | |
446 | temp = Fassoc (str, Vafter_load_alist); | |
265a9e55 | 447 | if (!NILP (temp)) |
078e7b4a JB |
448 | Fprogn (Fcdr (temp)); |
449 | UNGCPRO; | |
450 | ||
265a9e55 | 451 | if (!noninteractive && NILP (nomessage)) |
078e7b4a JB |
452 | message ("Loading %s...done", XSTRING (str)->data); |
453 | return Qt; | |
454 | } | |
455 | ||
456 | static Lisp_Object | |
457 | load_unwind (stream) /* used as unwind-protect function in load */ | |
458 | Lisp_Object stream; | |
459 | { | |
c8bdaa8c RS |
460 | fclose ((FILE *) (XFASTINT (XCONS (stream)->car) << 16 |
461 | | XFASTINT (XCONS (stream)->cdr))); | |
078e7b4a JB |
462 | if (--load_in_progress < 0) load_in_progress = 0; |
463 | return Qnil; | |
464 | } | |
465 | ||
d2c6be7f RS |
466 | static Lisp_Object |
467 | load_descriptor_unwind (oldlist) | |
468 | Lisp_Object oldlist; | |
469 | { | |
470 | load_descriptor_list = oldlist; | |
838abf56 | 471 | return Qnil; |
d2c6be7f RS |
472 | } |
473 | ||
474 | /* Close all descriptors in use for Floads. | |
475 | This is used when starting a subprocess. */ | |
476 | ||
477 | void | |
478 | close_load_descs () | |
479 | { | |
480 | Lisp_Object tail; | |
481 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) | |
482 | close (XFASTINT (XCONS (tail)->car)); | |
483 | } | |
078e7b4a JB |
484 | \f |
485 | static int | |
486 | complete_filename_p (pathname) | |
487 | Lisp_Object pathname; | |
488 | { | |
489 | register unsigned char *s = XSTRING (pathname)->data; | |
317073d5 RS |
490 | return (IS_DIRECTORY_SEP (s[0]) |
491 | || (XSTRING (pathname)->size > 2 | |
492 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) | |
078e7b4a JB |
493 | #ifdef ALTOS |
494 | || *s == '@' | |
495 | #endif | |
496 | #ifdef VMS | |
497 | || index (s, ':') | |
498 | #endif /* VMS */ | |
499 | ); | |
500 | } | |
501 | ||
502 | /* Search for a file whose name is STR, looking in directories | |
503 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
504 | SUFFIX is a string containing possible suffixes separated by colons. | |
505 | On success, returns a file descriptor. On failure, returns -1. | |
506 | ||
507 | EXEC_ONLY nonzero means don't open the files, | |
508 | just look for one that is executable. In this case, | |
509 | returns 1 on success. | |
510 | ||
511 | If STOREPTR is nonzero, it points to a slot where the name of | |
512 | the file actually found should be stored as a Lisp string. | |
513 | Nil is stored there on failure. */ | |
514 | ||
515 | int | |
516 | openp (path, str, suffix, storeptr, exec_only) | |
517 | Lisp_Object path, str; | |
518 | char *suffix; | |
519 | Lisp_Object *storeptr; | |
520 | int exec_only; | |
521 | { | |
522 | register int fd; | |
523 | int fn_size = 100; | |
524 | char buf[100]; | |
525 | register char *fn = buf; | |
526 | int absolute = 0; | |
527 | int want_size; | |
528 | register Lisp_Object filename; | |
529 | struct stat st; | |
5a6e5452 | 530 | struct gcpro gcpro1; |
078e7b4a | 531 | |
5a6e5452 | 532 | GCPRO1 (str); |
078e7b4a JB |
533 | if (storeptr) |
534 | *storeptr = Qnil; | |
535 | ||
536 | if (complete_filename_p (str)) | |
537 | absolute = 1; | |
538 | ||
265a9e55 | 539 | for (; !NILP (path); path = Fcdr (path)) |
078e7b4a JB |
540 | { |
541 | char *nsuffix; | |
542 | ||
543 | filename = Fexpand_file_name (str, Fcar (path)); | |
544 | if (!complete_filename_p (filename)) | |
545 | /* If there are non-absolute elts in PATH (eg ".") */ | |
546 | /* Of course, this could conceivably lose if luser sets | |
547 | default-directory to be something non-absolute... */ | |
548 | { | |
549 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
550 | if (!complete_filename_p (filename)) | |
551 | /* Give up on this path element! */ | |
552 | continue; | |
553 | } | |
554 | ||
555 | /* Calculate maximum size of any filename made from | |
556 | this path element/specified file name and any possible suffix. */ | |
557 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; | |
558 | if (fn_size < want_size) | |
559 | fn = (char *) alloca (fn_size = 100 + want_size); | |
560 | ||
561 | nsuffix = suffix; | |
562 | ||
563 | /* Loop over suffixes. */ | |
564 | while (1) | |
565 | { | |
566 | char *esuffix = (char *) index (nsuffix, ':'); | |
567 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); | |
568 | ||
569 | /* Concatenate path element/specified name with the suffix. */ | |
570 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); | |
571 | fn[XSTRING (filename)->size] = 0; | |
572 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ | |
573 | strncat (fn, nsuffix, lsuffix); | |
574 | ||
575 | /* Ignore file if it's a directory. */ | |
576 | if (stat (fn, &st) >= 0 | |
577 | && (st.st_mode & S_IFMT) != S_IFDIR) | |
578 | { | |
579 | /* Check that we can access or open it. */ | |
580 | if (exec_only) | |
581 | fd = (access (fn, X_OK) == 0) ? 1 : -1; | |
582 | else | |
f7d279f0 | 583 | fd = open (fn, O_RDONLY, 0); |
078e7b4a JB |
584 | |
585 | if (fd >= 0) | |
586 | { | |
587 | /* We succeeded; return this descriptor and filename. */ | |
588 | if (storeptr) | |
589 | *storeptr = build_string (fn); | |
5ef2a3c0 KH |
590 | UNGCPRO; |
591 | return fd; | |
078e7b4a JB |
592 | } |
593 | } | |
594 | ||
595 | /* Advance to next suffix. */ | |
596 | if (esuffix == 0) | |
597 | break; | |
598 | nsuffix += lsuffix + 1; | |
599 | } | |
5a6e5452 | 600 | if (absolute) |
5ef2a3c0 | 601 | break; |
078e7b4a JB |
602 | } |
603 | ||
5ef2a3c0 KH |
604 | UNGCPRO; |
605 | return -1; | |
078e7b4a JB |
606 | } |
607 | ||
608 | \f | |
ae321d28 RS |
609 | /* Merge the list we've accumulated of globals from the current input source |
610 | into the load_history variable. The details depend on whether | |
611 | the source has an associated file name or not. */ | |
612 | ||
613 | static void | |
614 | build_load_history (stream, source) | |
615 | FILE *stream; | |
616 | Lisp_Object source; | |
617 | { | |
618 | register Lisp_Object tail, prev, newelt; | |
619 | register Lisp_Object tem, tem2; | |
620 | register int foundit, loading; | |
621 | ||
8a1f1537 RS |
622 | /* Don't bother recording anything for preloaded files. */ |
623 | if (!NILP (Vpurify_flag)) | |
624 | return; | |
625 | ||
ae321d28 RS |
626 | loading = stream || !NARROWED; |
627 | ||
628 | tail = Vload_history; | |
629 | prev = Qnil; | |
630 | foundit = 0; | |
631 | while (!NILP (tail)) | |
632 | { | |
633 | tem = Fcar (tail); | |
634 | ||
635 | /* Find the feature's previous assoc list... */ | |
636 | if (!NILP (Fequal (source, Fcar (tem)))) | |
637 | { | |
638 | foundit = 1; | |
639 | ||
640 | /* If we're loading, remove it. */ | |
641 | if (loading) | |
642 | { | |
643 | if (NILP (prev)) | |
644 | Vload_history = Fcdr (tail); | |
645 | else | |
646 | Fsetcdr (prev, Fcdr (tail)); | |
647 | } | |
648 | ||
649 | /* Otherwise, cons on new symbols that are not already members. */ | |
650 | else | |
651 | { | |
652 | tem2 = Vcurrent_load_list; | |
653 | ||
654 | while (CONSP (tem2)) | |
655 | { | |
656 | newelt = Fcar (tem2); | |
657 | ||
658 | if (NILP (Fmemq (newelt, tem))) | |
659 | Fsetcar (tail, Fcons (Fcar (tem), | |
660 | Fcons (newelt, Fcdr (tem)))); | |
661 | ||
662 | tem2 = Fcdr (tem2); | |
663 | QUIT; | |
664 | } | |
665 | } | |
666 | } | |
667 | else | |
668 | prev = tail; | |
669 | tail = Fcdr (tail); | |
670 | QUIT; | |
671 | } | |
672 | ||
8a1f1537 RS |
673 | /* If we're loading, cons the new assoc onto the front of load-history, |
674 | the most-recently-loaded position. Also do this if we didn't find | |
675 | an existing member for the current source. */ | |
676 | if (loading || !foundit) | |
677 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
678 | Vload_history); | |
ae321d28 RS |
679 | } |
680 | ||
078e7b4a JB |
681 | Lisp_Object |
682 | unreadpure () /* Used as unwind-protect function in readevalloop */ | |
683 | { | |
684 | read_pure = 0; | |
685 | return Qnil; | |
686 | } | |
687 | ||
688 | static void | |
ae321d28 | 689 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
078e7b4a | 690 | Lisp_Object readcharfun; |
ae321d28 RS |
691 | FILE *stream; |
692 | Lisp_Object sourcename; | |
078e7b4a JB |
693 | Lisp_Object (*evalfun) (); |
694 | int printflag; | |
695 | { | |
696 | register int c; | |
697 | register Lisp_Object val; | |
698 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 699 | struct gcpro gcpro1; |
49cf7ff4 RS |
700 | struct buffer *b = 0; |
701 | ||
702 | if (BUFFERP (readcharfun)) | |
703 | b = XBUFFER (readcharfun); | |
704 | else if (MARKERP (readcharfun)) | |
705 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
706 | |
707 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 708 | specbind (Qcurrent_load_list, Qnil); |
078e7b4a | 709 | |
8a1f1537 | 710 | GCPRO1 (sourcename); |
ae321d28 | 711 | |
ae321d28 RS |
712 | LOADHIST_ATTACH (sourcename); |
713 | ||
078e7b4a JB |
714 | while (1) |
715 | { | |
49cf7ff4 RS |
716 | if (b != 0 && NILP (b->name)) |
717 | error ("Reading from killed buffer"); | |
718 | ||
078e7b4a JB |
719 | instream = stream; |
720 | c = READCHAR; | |
721 | if (c == ';') | |
722 | { | |
723 | while ((c = READCHAR) != '\n' && c != -1); | |
724 | continue; | |
725 | } | |
726 | if (c < 0) break; | |
727 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f') continue; | |
728 | ||
265a9e55 | 729 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 730 | { |
0e326373 | 731 | int count1 = specpdl_ptr - specpdl; |
078e7b4a JB |
732 | record_unwind_protect (unreadpure, Qnil); |
733 | val = read_list (-1, readcharfun); | |
0e326373 | 734 | unbind_to (count1, Qnil); |
078e7b4a JB |
735 | } |
736 | else | |
737 | { | |
738 | UNREAD (c); | |
739 | val = read0 (readcharfun); | |
740 | } | |
741 | ||
742 | val = (*evalfun) (val); | |
743 | if (printflag) | |
744 | { | |
745 | Vvalues = Fcons (val, Vvalues); | |
746 | if (EQ (Vstandard_output, Qt)) | |
747 | Fprin1 (val, Qnil); | |
748 | else | |
749 | Fprint (val, Qnil); | |
750 | } | |
751 | } | |
752 | ||
ae321d28 | 753 | build_load_history (stream, sourcename); |
ae321d28 RS |
754 | UNGCPRO; |
755 | ||
078e7b4a JB |
756 | unbind_to (count, Qnil); |
757 | } | |
758 | ||
759 | #ifndef standalone | |
760 | ||
e5d77022 | 761 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
94b304d7 RS |
762 | "Execute the current buffer as Lisp code.\n\ |
763 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ | |
764 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ | |
765 | PRINTFLAG controls printing of output:\n\ | |
228d4b1c JA |
766 | nil means discard it; anything else is stream for print.\n\ |
767 | \n\ | |
768 | If there is no error, point does not move. If there is an error,\n\ | |
769 | point remains at the end of the last character read from the buffer.") | |
770 | (bufname, printflag) | |
771 | Lisp_Object bufname, printflag; | |
772 | { | |
773 | int count = specpdl_ptr - specpdl; | |
774 | Lisp_Object tem, buf; | |
775 | ||
dfdb645c | 776 | if (NILP (bufname)) |
228d4b1c JA |
777 | buf = Fcurrent_buffer (); |
778 | else | |
779 | buf = Fget_buffer (bufname); | |
dfdb645c | 780 | if (NILP (buf)) |
228d4b1c JA |
781 | error ("No such buffer."); |
782 | ||
dfdb645c | 783 | if (NILP (printflag)) |
228d4b1c JA |
784 | tem = Qsymbolp; |
785 | else | |
786 | tem = printflag; | |
787 | specbind (Qstandard_output, tem); | |
788 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
789 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
ae321d28 | 790 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
cb09ab7a | 791 | unbind_to (count, Qnil); |
228d4b1c JA |
792 | |
793 | return Qnil; | |
794 | } | |
795 | ||
796 | #if 0 | |
078e7b4a JB |
797 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
798 | "Execute the current buffer as Lisp code.\n\ | |
799 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ | |
800 | nil means discard it; anything else is stream for print.\n\ | |
801 | \n\ | |
802 | If there is no error, point does not move. If there is an error,\n\ | |
803 | point remains at the end of the last character read from the buffer.") | |
804 | (printflag) | |
805 | Lisp_Object printflag; | |
806 | { | |
807 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
808 | Lisp_Object tem, cbuf; |
809 | ||
810 | cbuf = Fcurrent_buffer () | |
078e7b4a | 811 | |
265a9e55 | 812 | if (NILP (printflag)) |
078e7b4a JB |
813 | tem = Qsymbolp; |
814 | else | |
815 | tem = printflag; | |
816 | specbind (Qstandard_output, tem); | |
817 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
818 | SET_PT (BEGV); | |
ae321d28 | 819 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
820 | return unbind_to (count, Qnil); |
821 | } | |
228d4b1c | 822 | #endif |
078e7b4a JB |
823 | |
824 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", | |
825 | "Execute the region as Lisp code.\n\ | |
826 | When called from programs, expects two arguments,\n\ | |
827 | giving starting and ending indices in the current buffer\n\ | |
828 | of the text to be executed.\n\ | |
829 | Programs can pass third argument PRINTFLAG which controls output:\n\ | |
830 | nil means discard it; anything else is stream for printing it.\n\ | |
831 | \n\ | |
832 | If there is no error, point does not move. If there is an error,\n\ | |
833 | point remains at the end of the last character read from the buffer.") | |
834 | (b, e, printflag) | |
835 | Lisp_Object b, e, printflag; | |
836 | { | |
837 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
838 | Lisp_Object tem, cbuf; |
839 | ||
840 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 841 | |
265a9e55 | 842 | if (NILP (printflag)) |
078e7b4a JB |
843 | tem = Qsymbolp; |
844 | else | |
845 | tem = printflag; | |
846 | specbind (Qstandard_output, tem); | |
847 | ||
265a9e55 | 848 | if (NILP (printflag)) |
078e7b4a JB |
849 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
850 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
851 | ||
852 | /* This both uses b and checks its type. */ | |
853 | Fgoto_char (b); | |
854 | Fnarrow_to_region (make_number (BEGV), e); | |
ae321d28 | 855 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
856 | |
857 | return unbind_to (count, Qnil); | |
858 | } | |
859 | ||
860 | #endif /* standalone */ | |
861 | \f | |
862 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
863 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ | |
864 | If STREAM is nil, use the value of `standard-input' (which see).\n\ | |
865 | STREAM or the value of `standard-input' may be:\n\ | |
866 | a buffer (read from point and advance it)\n\ | |
867 | a marker (read from where it points and advance it)\n\ | |
868 | a function (call it with no arguments for each character,\n\ | |
869 | call it with a char as argument to push a char back)\n\ | |
870 | a string (takes text from string, starting at the beginning)\n\ | |
871 | t (read text line using minibuffer and use it).") | |
872 | (readcharfun) | |
873 | Lisp_Object readcharfun; | |
874 | { | |
875 | extern Lisp_Object Fread_minibuffer (); | |
876 | ||
265a9e55 | 877 | if (NILP (readcharfun)) |
078e7b4a JB |
878 | readcharfun = Vstandard_input; |
879 | if (EQ (readcharfun, Qt)) | |
880 | readcharfun = Qread_char; | |
881 | ||
882 | #ifndef standalone | |
883 | if (EQ (readcharfun, Qread_char)) | |
884 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); | |
885 | #endif | |
886 | ||
cfff016d | 887 | if (STRINGP (readcharfun)) |
078e7b4a JB |
888 | return Fcar (Fread_from_string (readcharfun, Qnil, Qnil)); |
889 | ||
890 | return read0 (readcharfun); | |
891 | } | |
892 | ||
893 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
894 | "Read one Lisp expression which is represented as text by STRING.\n\ | |
895 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ | |
896 | START and END optionally delimit a substring of STRING from which to read;\n\ | |
897 | they default to 0 and (length STRING) respectively.") | |
898 | (string, start, end) | |
899 | Lisp_Object string, start, end; | |
900 | { | |
901 | int startval, endval; | |
902 | Lisp_Object tem; | |
903 | ||
904 | CHECK_STRING (string,0); | |
905 | ||
265a9e55 | 906 | if (NILP (end)) |
078e7b4a JB |
907 | endval = XSTRING (string)->size; |
908 | else | |
909 | { CHECK_NUMBER (end,2); | |
910 | endval = XINT (end); | |
911 | if (endval < 0 || endval > XSTRING (string)->size) | |
912 | args_out_of_range (string, end); | |
913 | } | |
914 | ||
265a9e55 | 915 | if (NILP (start)) |
078e7b4a JB |
916 | startval = 0; |
917 | else | |
918 | { CHECK_NUMBER (start,1); | |
919 | startval = XINT (start); | |
920 | if (startval < 0 || startval > endval) | |
921 | args_out_of_range (string, start); | |
922 | } | |
923 | ||
924 | read_from_string_index = startval; | |
925 | read_from_string_limit = endval; | |
926 | ||
927 | tem = read0 (string); | |
928 | return Fcons (tem, make_number (read_from_string_index)); | |
929 | } | |
930 | \f | |
6428369f KH |
931 | /* Use this for recursive reads, in contexts where internal tokens |
932 | are not allowed. */ | |
078e7b4a JB |
933 | static Lisp_Object |
934 | read0 (readcharfun) | |
935 | Lisp_Object readcharfun; | |
936 | { | |
937 | register Lisp_Object val; | |
938 | char c; | |
939 | ||
6428369f KH |
940 | val = read1 (readcharfun, &c); |
941 | if (c) | |
942 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); | |
078e7b4a JB |
943 | |
944 | return val; | |
945 | } | |
946 | \f | |
947 | static int read_buffer_size; | |
948 | static char *read_buffer; | |
949 | ||
950 | static int | |
951 | read_escape (readcharfun) | |
952 | Lisp_Object readcharfun; | |
953 | { | |
954 | register int c = READCHAR; | |
955 | switch (c) | |
956 | { | |
957 | case 'a': | |
265a9e55 | 958 | return '\007'; |
078e7b4a JB |
959 | case 'b': |
960 | return '\b'; | |
f405a585 RS |
961 | case 'd': |
962 | return 0177; | |
078e7b4a JB |
963 | case 'e': |
964 | return 033; | |
965 | case 'f': | |
966 | return '\f'; | |
967 | case 'n': | |
968 | return '\n'; | |
969 | case 'r': | |
970 | return '\r'; | |
971 | case 't': | |
972 | return '\t'; | |
973 | case 'v': | |
974 | return '\v'; | |
975 | case '\n': | |
976 | return -1; | |
977 | ||
978 | case 'M': | |
979 | c = READCHAR; | |
980 | if (c != '-') | |
981 | error ("Invalid escape character syntax"); | |
982 | c = READCHAR; | |
983 | if (c == '\\') | |
984 | c = read_escape (readcharfun); | |
7bd279cd | 985 | return c | meta_modifier; |
f405a585 RS |
986 | |
987 | case 'S': | |
988 | c = READCHAR; | |
989 | if (c != '-') | |
990 | error ("Invalid escape character syntax"); | |
991 | c = READCHAR; | |
992 | if (c == '\\') | |
993 | c = read_escape (readcharfun); | |
e6e332b9 RS |
994 | if ((c & 0xff) >= 'a' && (c & 0xff) <= 'z') |
995 | return c - ('a' - 'A'); | |
7bd279cd RS |
996 | return c | shift_modifier; |
997 | ||
998 | case 'H': | |
999 | c = READCHAR; | |
1000 | if (c != '-') | |
1001 | error ("Invalid escape character syntax"); | |
1002 | c = READCHAR; | |
1003 | if (c == '\\') | |
1004 | c = read_escape (readcharfun); | |
1005 | return c | hyper_modifier; | |
1006 | ||
1007 | case 'A': | |
1008 | c = READCHAR; | |
1009 | if (c != '-') | |
1010 | error ("Invalid escape character syntax"); | |
1011 | c = READCHAR; | |
1012 | if (c == '\\') | |
1013 | c = read_escape (readcharfun); | |
1014 | return c | alt_modifier; | |
1015 | ||
1016 | case 's': | |
1017 | c = READCHAR; | |
1018 | if (c != '-') | |
1019 | error ("Invalid escape character syntax"); | |
1020 | c = READCHAR; | |
1021 | if (c == '\\') | |
1022 | c = read_escape (readcharfun); | |
1023 | return c | super_modifier; | |
078e7b4a JB |
1024 | |
1025 | case 'C': | |
1026 | c = READCHAR; | |
1027 | if (c != '-') | |
1028 | error ("Invalid escape character syntax"); | |
1029 | case '^': | |
1030 | c = READCHAR; | |
1031 | if (c == '\\') | |
1032 | c = read_escape (readcharfun); | |
f405a585 RS |
1033 | if ((c & 0177) == '?') |
1034 | return 0177 | c; | |
1035 | /* ASCII control chars are made from letters (both cases), | |
1036 | as well as the non-letters within 0100...0137. */ | |
1037 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1038 | return (c & (037 | ~0177)); | |
1039 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1040 | return (c & (037 | ~0177)); | |
078e7b4a | 1041 | else |
7bd279cd | 1042 | return c | ctrl_modifier; |
078e7b4a JB |
1043 | |
1044 | case '0': | |
1045 | case '1': | |
1046 | case '2': | |
1047 | case '3': | |
1048 | case '4': | |
1049 | case '5': | |
1050 | case '6': | |
1051 | case '7': | |
1052 | /* An octal escape, as in ANSI C. */ | |
1053 | { | |
1054 | register int i = c - '0'; | |
1055 | register int count = 0; | |
1056 | while (++count < 3) | |
1057 | { | |
1058 | if ((c = READCHAR) >= '0' && c <= '7') | |
1059 | { | |
1060 | i *= 8; | |
1061 | i += c - '0'; | |
1062 | } | |
1063 | else | |
1064 | { | |
1065 | UNREAD (c); | |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | return i; | |
1070 | } | |
1071 | ||
1072 | case 'x': | |
1073 | /* A hex escape, as in ANSI C. */ | |
1074 | { | |
1075 | int i = 0; | |
1076 | while (1) | |
1077 | { | |
1078 | c = READCHAR; | |
1079 | if (c >= '0' && c <= '9') | |
1080 | { | |
1081 | i *= 16; | |
1082 | i += c - '0'; | |
1083 | } | |
1084 | else if ((c >= 'a' && c <= 'f') | |
1085 | || (c >= 'A' && c <= 'F')) | |
1086 | { | |
1087 | i *= 16; | |
1088 | if (c >= 'a' && c <= 'f') | |
1089 | i += c - 'a' + 10; | |
1090 | else | |
1091 | i += c - 'A' + 10; | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | UNREAD (c); | |
1096 | break; | |
1097 | } | |
1098 | } | |
1099 | return i; | |
1100 | } | |
1101 | ||
1102 | default: | |
1103 | return c; | |
1104 | } | |
1105 | } | |
1106 | ||
6428369f KH |
1107 | /* If the next token is ')' or ']' or '.', we store that character |
1108 | in *PCH and the return value is not interesting. Else, we store | |
1109 | zero in *PCH and we read and return one lisp object. */ | |
078e7b4a | 1110 | static Lisp_Object |
6428369f | 1111 | read1 (readcharfun, pch) |
078e7b4a | 1112 | register Lisp_Object readcharfun; |
6428369f | 1113 | char *pch; |
078e7b4a JB |
1114 | { |
1115 | register int c; | |
6428369f | 1116 | *pch = 0; |
078e7b4a JB |
1117 | |
1118 | retry: | |
1119 | ||
1120 | c = READCHAR; | |
1121 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1122 | ||
1123 | switch (c) | |
1124 | { | |
1125 | case '(': | |
1126 | return read_list (0, readcharfun); | |
1127 | ||
1128 | case '[': | |
1129 | return read_vector (readcharfun); | |
1130 | ||
1131 | case ')': | |
1132 | case ']': | |
078e7b4a | 1133 | { |
6428369f KH |
1134 | *pch = c; |
1135 | return Qnil; | |
078e7b4a JB |
1136 | } |
1137 | ||
1138 | case '#': | |
200f684e RS |
1139 | c = READCHAR; |
1140 | if (c == '[') | |
1141 | { | |
1142 | /* Accept compiled functions at read-time so that we don't have to | |
1143 | build them using function calls. */ | |
748ef62f RS |
1144 | Lisp_Object tmp; |
1145 | tmp = read_vector (readcharfun); | |
1146 | return Fmake_byte_code (XVECTOR (tmp)->size, | |
1147 | XVECTOR (tmp)->contents); | |
200f684e | 1148 | } |
748ef62f RS |
1149 | #ifdef USE_TEXT_PROPERTIES |
1150 | if (c == '(') | |
1151 | { | |
1152 | Lisp_Object tmp; | |
1153 | struct gcpro gcpro1; | |
6428369f | 1154 | char ch; |
748ef62f RS |
1155 | |
1156 | /* Read the string itself. */ | |
6428369f KH |
1157 | tmp = read1 (readcharfun, &ch); |
1158 | if (ch != 0 || !STRINGP (tmp)) | |
748ef62f RS |
1159 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
1160 | GCPRO1 (tmp); | |
1161 | /* Read the intervals and their properties. */ | |
1162 | while (1) | |
1163 | { | |
1164 | Lisp_Object beg, end, plist; | |
1165 | ||
6428369f KH |
1166 | beg = read1 (readcharfun, &ch); |
1167 | if (ch == ')') | |
1168 | break; | |
1169 | if (ch == 0) | |
1170 | end = read1 (readcharfun, &ch); | |
1171 | if (ch == 0) | |
1172 | plist = read1 (readcharfun, &ch); | |
1173 | if (ch) | |
748ef62f | 1174 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
1175 | Fcons (build_string ("invalid string property list"), |
1176 | Qnil)); | |
748ef62f RS |
1177 | Fset_text_properties (beg, end, plist, tmp); |
1178 | } | |
1179 | UNGCPRO; | |
1180 | return tmp; | |
1181 | } | |
1182 | #endif | |
200f684e | 1183 | UNREAD (c); |
748ef62f | 1184 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
1185 | |
1186 | case ';': | |
1187 | while ((c = READCHAR) >= 0 && c != '\n'); | |
1188 | goto retry; | |
1189 | ||
1190 | case '\'': | |
1191 | { | |
1192 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
1193 | } | |
1194 | ||
1195 | case '?': | |
1196 | { | |
1197 | register Lisp_Object val; | |
1198 | ||
1199 | c = READCHAR; | |
1200 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1201 | ||
1202 | if (c == '\\') | |
1805de4f | 1203 | XSETINT (val, read_escape (readcharfun)); |
078e7b4a | 1204 | else |
1805de4f | 1205 | XSETINT (val, c); |
078e7b4a JB |
1206 | |
1207 | return val; | |
1208 | } | |
1209 | ||
1210 | case '\"': | |
1211 | { | |
1212 | register char *p = read_buffer; | |
1213 | register char *end = read_buffer + read_buffer_size; | |
1214 | register int c; | |
1215 | int cancel = 0; | |
1216 | ||
1217 | while ((c = READCHAR) >= 0 | |
1218 | && c != '\"') | |
1219 | { | |
1220 | if (p == end) | |
1221 | { | |
1222 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1223 | p += new - read_buffer; | |
1224 | read_buffer += new - read_buffer; | |
1225 | end = read_buffer + read_buffer_size; | |
1226 | } | |
1227 | if (c == '\\') | |
1228 | c = read_escape (readcharfun); | |
1229 | /* c is -1 if \ newline has just been seen */ | |
f405a585 | 1230 | if (c == -1) |
078e7b4a JB |
1231 | { |
1232 | if (p == read_buffer) | |
1233 | cancel = 1; | |
1234 | } | |
1235 | else | |
f943104a | 1236 | { |
988c2f83 RS |
1237 | /* Allow `\C- ' and `\C-?'. */ |
1238 | if (c == (CHAR_CTL | ' ')) | |
1239 | c = 0; | |
1240 | else if (c == (CHAR_CTL | '?')) | |
1241 | c = 127; | |
1242 | ||
f943104a KH |
1243 | if (c & CHAR_META) |
1244 | /* Move the meta bit to the right place for a string. */ | |
1245 | c = (c & ~CHAR_META) | 0x80; | |
1246 | if (c & ~0xff) | |
1247 | error ("Invalid modifier in string"); | |
1248 | *p++ = c; | |
1249 | } | |
078e7b4a JB |
1250 | } |
1251 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1252 | ||
1253 | /* If purifying, and string starts with \ newline, | |
1254 | return zero instead. This is for doc strings | |
08564963 | 1255 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 1256 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
1257 | return make_number (0); |
1258 | ||
1259 | if (read_pure) | |
1260 | return make_pure_string (read_buffer, p - read_buffer); | |
1261 | else | |
1262 | return make_string (read_buffer, p - read_buffer); | |
1263 | } | |
1264 | ||
109d300c JB |
1265 | case '.': |
1266 | { | |
1267 | #ifdef LISP_FLOAT_TYPE | |
1268 | /* If a period is followed by a number, then we should read it | |
1269 | as a floating point number. Otherwise, it denotes a dotted | |
1270 | pair. */ | |
1271 | int next_char = READCHAR; | |
1272 | UNREAD (next_char); | |
1273 | ||
075027b1 | 1274 | if (! (next_char >= '0' && next_char <= '9')) |
109d300c JB |
1275 | #endif |
1276 | { | |
6428369f KH |
1277 | *pch = c; |
1278 | return Qnil; | |
109d300c JB |
1279 | } |
1280 | ||
1281 | /* Otherwise, we fall through! Note that the atom-reading loop | |
1282 | below will now loop at least once, assuring that we will not | |
1283 | try to UNREAD two characters in a row. */ | |
1284 | } | |
078e7b4a JB |
1285 | default: |
1286 | if (c <= 040) goto retry; | |
1287 | { | |
1288 | register char *p = read_buffer; | |
481c6336 | 1289 | int quoted = 0; |
078e7b4a JB |
1290 | |
1291 | { | |
1292 | register char *end = read_buffer + read_buffer_size; | |
1293 | ||
1294 | while (c > 040 && | |
1295 | !(c == '\"' || c == '\'' || c == ';' || c == '?' | |
1296 | || c == '(' || c == ')' | |
109d300c JB |
1297 | #ifndef LISP_FLOAT_TYPE |
1298 | /* If we have floating-point support, then we need | |
1299 | to allow <digits><dot><digits>. */ | |
078e7b4a JB |
1300 | || c =='.' |
1301 | #endif /* not LISP_FLOAT_TYPE */ | |
1302 | || c == '[' || c == ']' || c == '#' | |
1303 | )) | |
1304 | { | |
1305 | if (p == end) | |
1306 | { | |
1307 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1308 | p += new - read_buffer; | |
1309 | read_buffer += new - read_buffer; | |
1310 | end = read_buffer + read_buffer_size; | |
1311 | } | |
1312 | if (c == '\\') | |
481c6336 RS |
1313 | { |
1314 | c = READCHAR; | |
1315 | quoted = 1; | |
1316 | } | |
078e7b4a JB |
1317 | *p++ = c; |
1318 | c = READCHAR; | |
1319 | } | |
1320 | ||
1321 | if (p == end) | |
1322 | { | |
1323 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1324 | p += new - read_buffer; | |
1325 | read_buffer += new - read_buffer; | |
1326 | /* end = read_buffer + read_buffer_size; */ | |
1327 | } | |
1328 | *p = 0; | |
1329 | if (c >= 0) | |
1330 | UNREAD (c); | |
1331 | } | |
1332 | ||
481c6336 RS |
1333 | if (!quoted) |
1334 | { | |
1335 | register char *p1; | |
1336 | register Lisp_Object val; | |
1337 | p1 = read_buffer; | |
1338 | if (*p1 == '+' || *p1 == '-') p1++; | |
1339 | /* Is it an integer? */ | |
1340 | if (p1 != p) | |
1341 | { | |
1342 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
dbc4e1c1 | 1343 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1344 | /* Integers can have trailing decimal points. */ |
1345 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
dbc4e1c1 | 1346 | #endif |
481c6336 RS |
1347 | if (p1 == p) |
1348 | /* It is an integer. */ | |
1349 | { | |
dbc4e1c1 | 1350 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1351 | if (p1[-1] == '.') |
1352 | p1[-1] = '\0'; | |
dbc4e1c1 | 1353 | #endif |
1805de4f | 1354 | XSETINT (val, atoi (read_buffer)); |
481c6336 RS |
1355 | return val; |
1356 | } | |
1357 | } | |
078e7b4a | 1358 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1359 | if (isfloat_string (read_buffer)) |
1360 | return make_float (atof (read_buffer)); | |
078e7b4a | 1361 | #endif |
481c6336 | 1362 | } |
078e7b4a JB |
1363 | |
1364 | return intern (read_buffer); | |
1365 | } | |
1366 | } | |
1367 | } | |
1368 | \f | |
1369 | #ifdef LISP_FLOAT_TYPE | |
1370 | ||
078e7b4a JB |
1371 | #define LEAD_INT 1 |
1372 | #define DOT_CHAR 2 | |
1373 | #define TRAIL_INT 4 | |
1374 | #define E_CHAR 8 | |
1375 | #define EXP_INT 16 | |
1376 | ||
1377 | int | |
1378 | isfloat_string (cp) | |
1379 | register char *cp; | |
1380 | { | |
1381 | register state; | |
1382 | ||
1383 | state = 0; | |
1384 | if (*cp == '+' || *cp == '-') | |
1385 | cp++; | |
1386 | ||
075027b1 | 1387 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1388 | { |
1389 | state |= LEAD_INT; | |
075027b1 RS |
1390 | while (*cp >= '0' && *cp <= '9') |
1391 | cp++; | |
078e7b4a JB |
1392 | } |
1393 | if (*cp == '.') | |
1394 | { | |
1395 | state |= DOT_CHAR; | |
1396 | cp++; | |
1397 | } | |
075027b1 | 1398 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1399 | { |
1400 | state |= TRAIL_INT; | |
075027b1 | 1401 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1402 | cp++; |
1403 | } | |
1404 | if (*cp == 'e') | |
1405 | { | |
1406 | state |= E_CHAR; | |
1407 | cp++; | |
1408 | } | |
1409 | if ((*cp == '+') || (*cp == '-')) | |
1410 | cp++; | |
1411 | ||
075027b1 | 1412 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1413 | { |
1414 | state |= EXP_INT; | |
075027b1 | 1415 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1416 | cp++; |
1417 | } | |
1418 | return (*cp == 0 | |
1419 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) | |
151bdc83 | 1420 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 1421 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
1422 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
1423 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a JB |
1424 | } |
1425 | #endif /* LISP_FLOAT_TYPE */ | |
1426 | \f | |
1427 | static Lisp_Object | |
1428 | read_vector (readcharfun) | |
1429 | Lisp_Object readcharfun; | |
1430 | { | |
1431 | register int i; | |
1432 | register int size; | |
1433 | register Lisp_Object *ptr; | |
1434 | register Lisp_Object tem, vector; | |
1435 | register struct Lisp_Cons *otem; | |
1436 | Lisp_Object len; | |
1437 | ||
1438 | tem = read_list (1, readcharfun); | |
1439 | len = Flength (tem); | |
1440 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
1441 | ||
1442 | ||
1443 | size = XVECTOR (vector)->size; | |
1444 | ptr = XVECTOR (vector)->contents; | |
1445 | for (i = 0; i < size; i++) | |
1446 | { | |
1447 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); | |
1448 | otem = XCONS (tem); | |
1449 | tem = Fcdr (tem); | |
1450 | free_cons (otem); | |
1451 | } | |
1452 | return vector; | |
1453 | } | |
1454 | ||
1455 | /* flag = 1 means check for ] to terminate rather than ) and . | |
1456 | flag = -1 means check for starting with defun | |
1457 | and make structure pure. */ | |
1458 | ||
1459 | static Lisp_Object | |
1460 | read_list (flag, readcharfun) | |
1461 | int flag; | |
1462 | register Lisp_Object readcharfun; | |
1463 | { | |
1464 | /* -1 means check next element for defun, | |
1465 | 0 means don't check, | |
1466 | 1 means already checked and found defun. */ | |
1467 | int defunflag = flag < 0 ? -1 : 0; | |
1468 | Lisp_Object val, tail; | |
1469 | register Lisp_Object elt, tem; | |
1470 | struct gcpro gcpro1, gcpro2; | |
1471 | ||
1472 | val = Qnil; | |
1473 | tail = Qnil; | |
1474 | ||
1475 | while (1) | |
1476 | { | |
6428369f | 1477 | char ch; |
078e7b4a | 1478 | GCPRO2 (val, tail); |
6428369f | 1479 | elt = read1 (readcharfun, &ch); |
078e7b4a | 1480 | UNGCPRO; |
6428369f | 1481 | if (ch) |
078e7b4a JB |
1482 | { |
1483 | if (flag > 0) | |
1484 | { | |
6428369f | 1485 | if (ch == ']') |
078e7b4a | 1486 | return val; |
6428369f | 1487 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (") or . in a vector", 18), Qnil)); |
078e7b4a | 1488 | } |
6428369f | 1489 | if (ch == ')') |
078e7b4a | 1490 | return val; |
6428369f | 1491 | if (ch == '.') |
078e7b4a JB |
1492 | { |
1493 | GCPRO2 (val, tail); | |
265a9e55 | 1494 | if (!NILP (tail)) |
078e7b4a JB |
1495 | XCONS (tail)->cdr = read0 (readcharfun); |
1496 | else | |
1497 | val = read0 (readcharfun); | |
6428369f | 1498 | read1 (readcharfun, &ch); |
078e7b4a | 1499 | UNGCPRO; |
6428369f | 1500 | if (ch == ')') |
078e7b4a JB |
1501 | return val; |
1502 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); | |
1503 | } | |
1504 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
1505 | } | |
1506 | tem = (read_pure && flag <= 0 | |
1507 | ? pure_cons (elt, Qnil) | |
1508 | : Fcons (elt, Qnil)); | |
265a9e55 | 1509 | if (!NILP (tail)) |
078e7b4a JB |
1510 | XCONS (tail)->cdr = tem; |
1511 | else | |
1512 | val = tem; | |
1513 | tail = tem; | |
1514 | if (defunflag < 0) | |
1515 | defunflag = EQ (elt, Qdefun); | |
1516 | else if (defunflag > 0) | |
1517 | read_pure = 1; | |
1518 | } | |
1519 | } | |
1520 | \f | |
1521 | Lisp_Object Vobarray; | |
1522 | Lisp_Object initial_obarray; | |
1523 | ||
1524 | Lisp_Object | |
1525 | check_obarray (obarray) | |
1526 | Lisp_Object obarray; | |
1527 | { | |
cfff016d | 1528 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1529 | { |
1530 | /* If Vobarray is now invalid, force it to be valid. */ | |
1531 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
1532 | ||
1533 | obarray = wrong_type_argument (Qvectorp, obarray); | |
1534 | } | |
1535 | return obarray; | |
1536 | } | |
1537 | ||
1538 | static int hash_string (); | |
1539 | Lisp_Object oblookup (); | |
1540 | ||
1541 | Lisp_Object | |
1542 | intern (str) | |
1543 | char *str; | |
1544 | { | |
1545 | Lisp_Object tem; | |
1546 | int len = strlen (str); | |
153a17b7 | 1547 | Lisp_Object obarray; |
078e7b4a | 1548 | |
153a17b7 | 1549 | obarray = Vobarray; |
cfff016d | 1550 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1551 | obarray = check_obarray (obarray); |
1552 | tem = oblookup (obarray, str, len); | |
cfff016d | 1553 | if (SYMBOLP (tem)) |
078e7b4a | 1554 | return tem; |
265a9e55 | 1555 | return Fintern ((!NILP (Vpurify_flag) |
078e7b4a JB |
1556 | ? make_pure_string (str, len) |
1557 | : make_string (str, len)), | |
1558 | obarray); | |
1559 | } | |
1560 | ||
1561 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, | |
1562 | "Return the canonical symbol whose name is STRING.\n\ | |
1563 | If there is none, one is created by this function and returned.\n\ | |
1564 | A second optional argument specifies the obarray to use;\n\ | |
1565 | it defaults to the value of `obarray'.") | |
1566 | (str, obarray) | |
1567 | Lisp_Object str, obarray; | |
1568 | { | |
1569 | register Lisp_Object tem, sym, *ptr; | |
1570 | ||
265a9e55 | 1571 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1572 | obarray = check_obarray (obarray); |
1573 | ||
1574 | CHECK_STRING (str, 0); | |
1575 | ||
1576 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1577 | if (!INTEGERP (tem)) |
078e7b4a JB |
1578 | return tem; |
1579 | ||
265a9e55 | 1580 | if (!NILP (Vpurify_flag)) |
078e7b4a JB |
1581 | str = Fpurecopy (str); |
1582 | sym = Fmake_symbol (str); | |
1583 | ||
1584 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; | |
cfff016d | 1585 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
1586 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
1587 | else | |
1588 | XSYMBOL (sym)->next = 0; | |
1589 | *ptr = sym; | |
1590 | return sym; | |
1591 | } | |
1592 | ||
1593 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
1594 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ | |
1595 | A second optional argument specifies the obarray to use;\n\ | |
1596 | it defaults to the value of `obarray'.") | |
1597 | (str, obarray) | |
1598 | Lisp_Object str, obarray; | |
1599 | { | |
1600 | register Lisp_Object tem; | |
1601 | ||
265a9e55 | 1602 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1603 | obarray = check_obarray (obarray); |
1604 | ||
1605 | CHECK_STRING (str, 0); | |
1606 | ||
1607 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1608 | if (!INTEGERP (tem)) |
078e7b4a JB |
1609 | return tem; |
1610 | return Qnil; | |
1611 | } | |
1612 | ||
1613 | Lisp_Object | |
1614 | oblookup (obarray, ptr, size) | |
1615 | Lisp_Object obarray; | |
1616 | register char *ptr; | |
1617 | register int size; | |
1618 | { | |
7a70b397 RS |
1619 | int hash; |
1620 | int obsize; | |
078e7b4a JB |
1621 | register Lisp_Object tail; |
1622 | Lisp_Object bucket, tem; | |
1623 | ||
cfff016d | 1624 | if (!VECTORP (obarray) |
7c79a684 | 1625 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
1626 | { |
1627 | obarray = check_obarray (obarray); | |
1628 | obsize = XVECTOR (obarray)->size; | |
1629 | } | |
1630 | /* Combining next two lines breaks VMS C 2.3. */ | |
1631 | hash = hash_string (ptr, size); | |
1632 | hash %= obsize; | |
1633 | bucket = XVECTOR (obarray)->contents[hash]; | |
1634 | if (XFASTINT (bucket) == 0) | |
1635 | ; | |
cfff016d | 1636 | else if (!SYMBOLP (bucket)) |
078e7b4a | 1637 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
1805de4f | 1638 | else for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) |
078e7b4a JB |
1639 | { |
1640 | if (XSYMBOL (tail)->name->size == size && | |
1641 | !bcmp (XSYMBOL (tail)->name->data, ptr, size)) | |
1642 | return tail; | |
1643 | else if (XSYMBOL (tail)->next == 0) | |
1644 | break; | |
1645 | } | |
1805de4f | 1646 | XSETINT (tem, hash); |
078e7b4a JB |
1647 | return tem; |
1648 | } | |
1649 | ||
1650 | static int | |
1651 | hash_string (ptr, len) | |
1652 | unsigned char *ptr; | |
1653 | int len; | |
1654 | { | |
1655 | register unsigned char *p = ptr; | |
1656 | register unsigned char *end = p + len; | |
1657 | register unsigned char c; | |
1658 | register int hash = 0; | |
1659 | ||
1660 | while (p != end) | |
1661 | { | |
1662 | c = *p++; | |
1663 | if (c >= 0140) c -= 40; | |
1664 | hash = ((hash<<3) + (hash>>28) + c); | |
1665 | } | |
1666 | return hash & 07777777777; | |
1667 | } | |
1668 | ||
1669 | void | |
1670 | map_obarray (obarray, fn, arg) | |
1671 | Lisp_Object obarray; | |
1672 | int (*fn) (); | |
1673 | Lisp_Object arg; | |
1674 | { | |
1675 | register int i; | |
1676 | register Lisp_Object tail; | |
1677 | CHECK_VECTOR (obarray, 1); | |
1678 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) | |
1679 | { | |
1680 | tail = XVECTOR (obarray)->contents[i]; | |
1681 | if (XFASTINT (tail) != 0) | |
1682 | while (1) | |
1683 | { | |
1684 | (*fn) (tail, arg); | |
1685 | if (XSYMBOL (tail)->next == 0) | |
1686 | break; | |
1805de4f | 1687 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
1688 | } |
1689 | } | |
1690 | } | |
1691 | ||
1692 | mapatoms_1 (sym, function) | |
1693 | Lisp_Object sym, function; | |
1694 | { | |
1695 | call1 (function, sym); | |
1696 | } | |
1697 | ||
1698 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
1699 | "Call FUNCTION on every symbol in OBARRAY.\n\ | |
1700 | OBARRAY defaults to the value of `obarray'.") | |
1701 | (function, obarray) | |
1702 | Lisp_Object function, obarray; | |
1703 | { | |
1704 | Lisp_Object tem; | |
1705 | ||
265a9e55 | 1706 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1707 | obarray = check_obarray (obarray); |
1708 | ||
1709 | map_obarray (obarray, mapatoms_1, function); | |
1710 | return Qnil; | |
1711 | } | |
1712 | ||
5e88a39e | 1713 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
1714 | |
1715 | void | |
1716 | init_obarray () | |
1717 | { | |
1718 | Lisp_Object oblength; | |
1719 | int hash; | |
1720 | Lisp_Object *tem; | |
1721 | ||
baf69866 | 1722 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a JB |
1723 | |
1724 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); | |
1725 | Vobarray = Fmake_vector (oblength, make_number (0)); | |
1726 | initial_obarray = Vobarray; | |
1727 | staticpro (&initial_obarray); | |
1728 | /* Intern nil in the obarray */ | |
1729 | /* These locals are to kludge around a pyramid compiler bug. */ | |
1730 | hash = hash_string ("nil", 3); | |
1731 | /* Separate statement here to avoid VAXC bug. */ | |
1732 | hash %= OBARRAY_SIZE; | |
1733 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
1734 | *tem = Qnil; | |
1735 | ||
1736 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); | |
1737 | XSYMBOL (Qnil)->function = Qunbound; | |
1738 | XSYMBOL (Qunbound)->value = Qunbound; | |
1739 | XSYMBOL (Qunbound)->function = Qunbound; | |
1740 | ||
1741 | Qt = intern ("t"); | |
1742 | XSYMBOL (Qnil)->value = Qnil; | |
1743 | XSYMBOL (Qnil)->plist = Qnil; | |
1744 | XSYMBOL (Qt)->value = Qt; | |
1745 | ||
1746 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
1747 | Vpurify_flag = Qt; | |
1748 | ||
1749 | Qvariable_documentation = intern ("variable-documentation"); | |
1750 | ||
1751 | read_buffer_size = 100; | |
1752 | read_buffer = (char *) malloc (read_buffer_size); | |
1753 | } | |
1754 | \f | |
1755 | void | |
1756 | defsubr (sname) | |
1757 | struct Lisp_Subr *sname; | |
1758 | { | |
1759 | Lisp_Object sym; | |
1760 | sym = intern (sname->symbol_name); | |
1805de4f | 1761 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1762 | } |
1763 | ||
1764 | #ifdef NOTDEF /* use fset in subr.el now */ | |
1765 | void | |
1766 | defalias (sname, string) | |
1767 | struct Lisp_Subr *sname; | |
1768 | char *string; | |
1769 | { | |
1770 | Lisp_Object sym; | |
1771 | sym = intern (string); | |
1805de4f | 1772 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1773 | } |
1774 | #endif /* NOTDEF */ | |
1775 | ||
078e7b4a | 1776 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 1777 | to a C variable of type int. Sample call: */ |
078e7b4a | 1778 | /* DEFVARINT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 1779 | void |
e9e00ff2 | 1780 | defvar_int (namestring, address) |
078e7b4a JB |
1781 | char *namestring; |
1782 | int *address; | |
078e7b4a | 1783 | { |
1a0f90f7 | 1784 | Lisp_Object sym, val; |
078e7b4a | 1785 | sym = intern (namestring); |
1a0f90f7 KH |
1786 | val = allocate_misc (); |
1787 | XMISC (val)->type = Lisp_Misc_Intfwd; | |
fc1e7df5 | 1788 | XINTFWD (val)->intvar = address; |
1a0f90f7 | 1789 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1790 | } |
1791 | ||
1792 | /* Similar but define a variable whose value is T if address contains 1, | |
1a0f90f7 | 1793 | NIL if address contains 0 */ |
078e7b4a | 1794 | void |
e9e00ff2 | 1795 | defvar_bool (namestring, address) |
078e7b4a JB |
1796 | char *namestring; |
1797 | int *address; | |
078e7b4a | 1798 | { |
1a0f90f7 | 1799 | Lisp_Object sym, val; |
078e7b4a | 1800 | sym = intern (namestring); |
1a0f90f7 KH |
1801 | val = allocate_misc (); |
1802 | XMISC (val)->type = Lisp_Misc_Boolfwd; | |
fc1e7df5 | 1803 | XBOOLFWD (val)->boolvar = address; |
1a0f90f7 | 1804 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1805 | } |
1806 | ||
1a0f90f7 KH |
1807 | /* Similar but define a variable whose value is the Lisp Object stored |
1808 | at address. Two versions: with and without gc-marking of the C | |
1809 | variable. The nopro version is used when that variable will be | |
1810 | gc-marked for some other reason, since marking the same slot twice | |
1811 | can cause trouble with strings. */ | |
078e7b4a | 1812 | void |
1a0f90f7 | 1813 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
1814 | char *namestring; |
1815 | Lisp_Object *address; | |
078e7b4a | 1816 | { |
1a0f90f7 | 1817 | Lisp_Object sym, val; |
078e7b4a | 1818 | sym = intern (namestring); |
1a0f90f7 KH |
1819 | val = allocate_misc (); |
1820 | XMISC (val)->type = Lisp_Misc_Objfwd; | |
fc1e7df5 | 1821 | XOBJFWD (val)->objvar = address; |
1a0f90f7 | 1822 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1823 | } |
1824 | ||
078e7b4a | 1825 | void |
1a0f90f7 | 1826 | defvar_lisp (namestring, address) |
078e7b4a JB |
1827 | char *namestring; |
1828 | Lisp_Object *address; | |
078e7b4a | 1829 | { |
1a0f90f7 KH |
1830 | defvar_lisp_nopro (namestring, address); |
1831 | staticpro (address); | |
078e7b4a JB |
1832 | } |
1833 | ||
1834 | #ifndef standalone | |
1835 | ||
1836 | /* Similar but define a variable whose value is the Lisp Object stored in | |
2836d9a4 KH |
1837 | the current buffer. address is the address of the slot in the buffer |
1838 | that is current now. */ | |
078e7b4a JB |
1839 | |
1840 | void | |
4360b0c6 | 1841 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
1842 | char *namestring; |
1843 | Lisp_Object *address; | |
4360b0c6 | 1844 | Lisp_Object type; |
078e7b4a JB |
1845 | char *doc; |
1846 | { | |
1a0f90f7 | 1847 | Lisp_Object sym, val; |
078e7b4a JB |
1848 | int offset; |
1849 | extern struct buffer buffer_local_symbols; | |
1850 | ||
1851 | sym = intern (namestring); | |
1a0f90f7 | 1852 | val = allocate_misc (); |
078e7b4a JB |
1853 | offset = (char *)address - (char *)current_buffer; |
1854 | ||
1a0f90f7 | 1855 | XMISC (val)->type = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 1856 | XBUFFER_OBJFWD (val)->offset = offset; |
1a0f90f7 | 1857 | XSYMBOL (sym)->value = val; |
078e7b4a | 1858 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; |
4360b0c6 | 1859 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
2836d9a4 | 1860 | if (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)) == 0) |
078e7b4a JB |
1861 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
1862 | slot of buffer_local_flags */ | |
1863 | abort (); | |
1864 | } | |
1865 | ||
1866 | #endif /* standalone */ | |
1867 | \f | |
279499f0 | 1868 | init_lread () |
078e7b4a | 1869 | { |
46947372 | 1870 | char *normal; |
078e7b4a | 1871 | |
279499f0 | 1872 | /* Compute the default load-path. */ |
46947372 JB |
1873 | #ifdef CANNOT_DUMP |
1874 | normal = PATH_LOADSEARCH; | |
e065a56e | 1875 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
1876 | #else |
1877 | if (NILP (Vpurify_flag)) | |
1878 | normal = PATH_LOADSEARCH; | |
279499f0 | 1879 | else |
46947372 | 1880 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 1881 | |
46947372 JB |
1882 | /* In a dumped Emacs, we normally have to reset the value of |
1883 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
1884 | uses ../lisp, instead of the path of the installed elisp | |
1885 | libraries. However, if it appears that Vload_path was changed | |
1886 | from the default before dumping, don't override that value. */ | |
4746118a JB |
1887 | if (initialized) |
1888 | { | |
1889 | Lisp_Object dump_path; | |
46947372 | 1890 | |
e065a56e | 1891 | dump_path = decode_env_path (0, PATH_DUMPLOADSEARCH); |
4746118a | 1892 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
1893 | { |
1894 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 1895 | if (!NILP (Vinstallation_directory)) |
80667d53 | 1896 | { |
74180aa4 | 1897 | /* Add to the path the lisp subdir of the |
3a3056e5 RS |
1898 | installation dir, if it exists. */ |
1899 | Lisp_Object tem, tem1; | |
74180aa4 RS |
1900 | tem = Fexpand_file_name (build_string ("lisp"), |
1901 | Vinstallation_directory); | |
3a3056e5 RS |
1902 | tem1 = Ffile_exists_p (tem); |
1903 | if (!NILP (tem1)) | |
1904 | { | |
1905 | if (NILP (Fmember (tem, Vload_path))) | |
1906 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
1907 | } | |
1908 | else | |
1909 | /* That dir doesn't exist, so add the build-time | |
1910 | Lisp dirs instead. */ | |
1911 | Vload_path = nconc2 (Vload_path, dump_path); | |
80667d53 RS |
1912 | } |
1913 | } | |
4746118a JB |
1914 | } |
1915 | else | |
e065a56e | 1916 | Vload_path = decode_env_path (0, normal); |
46947372 | 1917 | #endif |
279499f0 | 1918 | |
317073d5 RS |
1919 | #ifndef WINDOWSNT |
1920 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
1921 | almost never correct, thereby causing a warning to be printed out that | |
1922 | confuses users. Since PATH_LOADSEARCH is always overriden by the | |
1923 | EMACSLOADPATH environment variable below, disable the warning on NT. */ | |
1924 | ||
078e7b4a | 1925 | /* Warn if dirs in the *standard* path don't exist. */ |
46947372 JB |
1926 | { |
1927 | Lisp_Object path_tail; | |
078e7b4a | 1928 | |
46947372 JB |
1929 | for (path_tail = Vload_path; |
1930 | !NILP (path_tail); | |
1931 | path_tail = XCONS (path_tail)->cdr) | |
1932 | { | |
1933 | Lisp_Object dirfile; | |
1934 | dirfile = Fcar (path_tail); | |
cfff016d | 1935 | if (STRINGP (dirfile)) |
46947372 JB |
1936 | { |
1937 | dirfile = Fdirectory_file_name (dirfile); | |
1938 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
3a3056e5 RS |
1939 | fprintf (stderr, |
1940 | "Warning: Lisp directory `%s' does not exist.\n", | |
3917910a | 1941 | XSTRING (Fcar (path_tail))->data); |
46947372 JB |
1942 | } |
1943 | } | |
1944 | } | |
317073d5 | 1945 | #endif /* WINDOWSNT */ |
46947372 JB |
1946 | |
1947 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
1948 | This doesn't apply if we're dumping. */ | |
1949 | if (NILP (Vpurify_flag) | |
1950 | && egetenv ("EMACSLOADPATH")) | |
279499f0 | 1951 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
1952 | |
1953 | Vvalues = Qnil; | |
1954 | ||
078e7b4a | 1955 | load_in_progress = 0; |
d2c6be7f RS |
1956 | |
1957 | load_descriptor_list = Qnil; | |
078e7b4a JB |
1958 | } |
1959 | ||
1960 | void | |
279499f0 | 1961 | syms_of_lread () |
078e7b4a JB |
1962 | { |
1963 | defsubr (&Sread); | |
1964 | defsubr (&Sread_from_string); | |
1965 | defsubr (&Sintern); | |
1966 | defsubr (&Sintern_soft); | |
1967 | defsubr (&Sload); | |
228d4b1c | 1968 | defsubr (&Seval_buffer); |
078e7b4a JB |
1969 | defsubr (&Seval_region); |
1970 | defsubr (&Sread_char); | |
1971 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 1972 | defsubr (&Sread_event); |
078e7b4a JB |
1973 | defsubr (&Sget_file_char); |
1974 | defsubr (&Smapatoms); | |
1975 | ||
1976 | DEFVAR_LISP ("obarray", &Vobarray, | |
1977 | "Symbol table for use by `intern' and `read'.\n\ | |
1978 | It is a vector whose length ought to be prime for best results.\n\ | |
1979 | The vector's contents don't make sense if examined from Lisp programs;\n\ | |
1980 | to find all the symbols in an obarray, use `mapatoms'."); | |
1981 | ||
1982 | DEFVAR_LISP ("values", &Vvalues, | |
1983 | "List of values of all expressions which were read, evaluated and printed.\n\ | |
1984 | Order is reverse chronological."); | |
1985 | ||
1986 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
1987 | "Stream for read to get input from.\n\ | |
1988 | See documentation of `read' for possible values."); | |
1989 | Vstandard_input = Qt; | |
1990 | ||
1991 | DEFVAR_LISP ("load-path", &Vload_path, | |
1992 | "*List of directories to search for files to load.\n\ | |
1993 | Each element is a string (directory name) or nil (try default directory).\n\ | |
1994 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ | |
692f86ad | 1995 | otherwise to default specified by file `paths.h' when Emacs was built."); |
078e7b4a JB |
1996 | |
1997 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, | |
1998 | "Non-nil iff inside of `load'."); | |
1999 | ||
2000 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
2001 | "An alist of expressions to be evalled when particular files are loaded.\n\ | |
2002 | Each element looks like (FILENAME FORMS...).\n\ | |
2003 | When `load' is run and the file-name argument is FILENAME,\n\ | |
2004 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ | |
2005 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ | |
2006 | with no directory specified, since that is how `load' is normally called.\n\ | |
2007 | An error in FORMS does not undo the load,\n\ | |
2008 | but does prevent execution of the rest of the FORMS."); | |
2009 | Vafter_load_alist = Qnil; | |
2010 | ||
ae321d28 RS |
2011 | DEFVAR_LISP ("load-history", &Vload_history, |
2012 | "Alist mapping source file names to symbols and features.\n\ | |
2013 | Each alist element is a list that starts with a file name,\n\ | |
2014 | except for one element (optional) that starts with nil and describes\n\ | |
2015 | definitions evaluated from buffers not visiting files.\n\ | |
2016 | The remaining elements of each list are symbols defined as functions\n\ | |
2017 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); | |
2018 | Vload_history = Qnil; | |
2019 | ||
8a1f1537 RS |
2020 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
2021 | "Used for internal purposes by `load'."); | |
ae321d28 RS |
2022 | Vcurrent_load_list = Qnil; |
2023 | ||
d2c6be7f RS |
2024 | load_descriptor_list = Qnil; |
2025 | staticpro (&load_descriptor_list); | |
2026 | ||
8a1f1537 RS |
2027 | Qcurrent_load_list = intern ("current-load-list"); |
2028 | staticpro (&Qcurrent_load_list); | |
2029 | ||
078e7b4a JB |
2030 | Qstandard_input = intern ("standard-input"); |
2031 | staticpro (&Qstandard_input); | |
2032 | ||
2033 | Qread_char = intern ("read-char"); | |
2034 | staticpro (&Qread_char); | |
2035 | ||
2036 | Qget_file_char = intern ("get-file-char"); | |
2037 | staticpro (&Qget_file_char); | |
7bd279cd RS |
2038 | |
2039 | Qascii_character = intern ("ascii-character"); | |
2040 | staticpro (&Qascii_character); | |
c2225d00 RS |
2041 | |
2042 | Qload = intern ("load"); | |
2043 | staticpro (&Qload); | |
078e7b4a | 2044 | } |