Commit | Line | Data |
---|---|---|
078e7b4a | 1 | /* Lisp parsing and input streams. |
73aa9704 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, |
f8c25f1b | 3 | 1993, 1994, 1995 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; |
20ea2964 | 70 | Lisp_Object Qascii_character, Qload, Qload_file_name; |
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 | ||
20ea2964 | 84 | /* This is used to build the load history. */ |
ae321d28 RS |
85 | Lisp_Object Vcurrent_load_list; |
86 | ||
20ea2964 RS |
87 | /* Name of file actually being read by `load'. */ |
88 | Lisp_Object Vload_file_name; | |
89 | ||
84a15045 RS |
90 | /* Function to use for reading, in `load' and friends. */ |
91 | Lisp_Object Vload_read_function; | |
92 | ||
d2c6be7f RS |
93 | /* List of descriptors now open for Fload. */ |
94 | static Lisp_Object load_descriptor_list; | |
95 | ||
078e7b4a JB |
96 | /* File for get_file_char to read from. Use by load */ |
97 | static FILE *instream; | |
98 | ||
99 | /* When nonzero, read conses in pure space */ | |
100 | static int read_pure; | |
101 | ||
102 | /* For use within read-from-string (this reader is non-reentrant!!) */ | |
103 | static int read_from_string_index; | |
104 | static int read_from_string_limit; | |
105 | \f | |
106 | /* Handle unreading and rereading of characters. | |
107 | Write READCHAR to read a character, | |
108 | UNREAD(c) to unread c to be read again. */ | |
109 | ||
110 | #define READCHAR readchar (readcharfun) | |
111 | #define UNREAD(c) unreadchar (readcharfun, c) | |
112 | ||
113 | static int | |
114 | readchar (readcharfun) | |
115 | Lisp_Object readcharfun; | |
116 | { | |
117 | Lisp_Object tem; | |
118 | register struct buffer *inbuffer; | |
119 | register int c, mpos; | |
120 | ||
cfff016d | 121 | if (BUFFERP (readcharfun)) |
078e7b4a JB |
122 | { |
123 | inbuffer = XBUFFER (readcharfun); | |
124 | ||
125 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) | |
126 | return -1; | |
127 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); | |
128 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); | |
129 | ||
130 | return c; | |
131 | } | |
cfff016d | 132 | if (MARKERP (readcharfun)) |
078e7b4a JB |
133 | { |
134 | inbuffer = XMARKER (readcharfun)->buffer; | |
135 | ||
136 | mpos = marker_position (readcharfun); | |
137 | ||
138 | if (mpos > BUF_ZV (inbuffer) - 1) | |
139 | return -1; | |
140 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); | |
141 | if (mpos != BUF_GPT (inbuffer)) | |
142 | XMARKER (readcharfun)->bufpos++; | |
143 | else | |
144 | Fset_marker (readcharfun, make_number (mpos + 1), | |
145 | Fmarker_buffer (readcharfun)); | |
146 | return c; | |
147 | } | |
148 | if (EQ (readcharfun, Qget_file_char)) | |
2c1b5dbe KH |
149 | { |
150 | c = getc (instream); | |
151 | #ifdef EINTR | |
152 | /* Interrupted reads have been observed while reading over the network */ | |
153 | while (c == EOF && ferror (instream) && errno == EINTR) | |
154 | { | |
155 | clearerr (instream); | |
156 | c = getc (instream); | |
157 | } | |
158 | #endif | |
159 | return c; | |
160 | } | |
078e7b4a | 161 | |
cfff016d | 162 | if (STRINGP (readcharfun)) |
078e7b4a JB |
163 | { |
164 | register int c; | |
165 | /* This used to be return of a conditional expression, | |
166 | but that truncated -1 to a char on VMS. */ | |
167 | if (read_from_string_index < read_from_string_limit) | |
168 | c = XSTRING (readcharfun)->data[read_from_string_index++]; | |
169 | else | |
170 | c = -1; | |
171 | return c; | |
172 | } | |
173 | ||
174 | tem = call0 (readcharfun); | |
175 | ||
265a9e55 | 176 | if (NILP (tem)) |
078e7b4a JB |
177 | return -1; |
178 | return XINT (tem); | |
179 | } | |
180 | ||
181 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
182 | If the stream is a user function, call it with the char as argument. */ | |
183 | ||
184 | static void | |
185 | unreadchar (readcharfun, c) | |
186 | Lisp_Object readcharfun; | |
187 | int c; | |
188 | { | |
92fddec9 KH |
189 | if (c == -1) |
190 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
191 | since readchar didn't advance it when we read it. */ | |
192 | ; | |
cfff016d | 193 | else if (BUFFERP (readcharfun)) |
078e7b4a JB |
194 | { |
195 | if (XBUFFER (readcharfun) == current_buffer) | |
196 | SET_PT (point - 1); | |
197 | else | |
198 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
199 | } | |
cfff016d | 200 | else if (MARKERP (readcharfun)) |
078e7b4a | 201 | XMARKER (readcharfun)->bufpos--; |
cfff016d | 202 | else if (STRINGP (readcharfun)) |
078e7b4a JB |
203 | read_from_string_index--; |
204 | else if (EQ (readcharfun, Qget_file_char)) | |
205 | ungetc (c, instream); | |
206 | else | |
207 | call1 (readcharfun, make_number (c)); | |
208 | } | |
209 | ||
210 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
211 | \f | |
212 | /* get a character from the tty */ | |
213 | ||
3d9b22be JB |
214 | extern Lisp_Object read_char (); |
215 | ||
f42be754 JB |
216 | /* Read input events until we get one that's acceptable for our purposes. |
217 | ||
218 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
219 | until we get a character we like, and then stuffed into | |
220 | unread_switch_frame. | |
221 | ||
222 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
223 | if the unmodified version of the symbol has a Qascii_character | |
224 | property, and use that character, if present. | |
225 | ||
226 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
227 | get isn't an ASCII character with modifiers. If it's zero but | |
228 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
229 | character. */ | |
230 | Lisp_Object | |
231 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) | |
232 | int no_switch_frame, ascii_required, error_nonascii; | |
233 | { | |
234 | #ifdef standalone | |
235 | return make_number (getchar ()); | |
236 | #else | |
153a17b7 KH |
237 | register Lisp_Object val, delayed_switch_frame; |
238 | ||
239 | delayed_switch_frame = Qnil; | |
f42be754 JB |
240 | |
241 | /* Read until we get an acceptable event. */ | |
242 | retry: | |
243 | val = read_char (0, 0, 0, Qnil, 0); | |
244 | ||
cfff016d | 245 | if (BUFFERP (val)) |
6c82d689 KH |
246 | goto retry; |
247 | ||
f42be754 JB |
248 | /* switch-frame events are put off until after the next ASCII |
249 | character. This is better than signalling an error just because | |
250 | the last characters were typed to a separate minibuffer frame, | |
251 | for example. Eventually, some code which can deal with | |
252 | switch-frame events will read it and process it. */ | |
253 | if (no_switch_frame | |
254 | && EVENT_HAS_PARAMETERS (val) | |
255 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
256 | { | |
257 | delayed_switch_frame = val; | |
258 | goto retry; | |
259 | } | |
260 | ||
261 | if (ascii_required) | |
262 | { | |
263 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 264 | if (SYMBOLP (val)) |
f42be754 JB |
265 | { |
266 | Lisp_Object tem, tem1, tem2; | |
267 | tem = Fget (val, Qevent_symbol_element_mask); | |
268 | if (!NILP (tem)) | |
269 | { | |
270 | tem1 = Fget (Fcar (tem), Qascii_character); | |
271 | /* Merge this symbol's modifier bits | |
272 | with the ASCII equivalent of its basic code. */ | |
273 | if (!NILP (tem1)) | |
baf69866 | 274 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
275 | } |
276 | } | |
277 | ||
278 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 279 | if (!INTEGERP (val)) |
f42be754 JB |
280 | { |
281 | if (error_nonascii) | |
282 | { | |
1ec84625 | 283 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
284 | error ("Non-character input-event"); |
285 | } | |
286 | else | |
287 | goto retry; | |
288 | } | |
289 | } | |
290 | ||
291 | if (! NILP (delayed_switch_frame)) | |
292 | unread_switch_frame = delayed_switch_frame; | |
293 | ||
294 | return val; | |
295 | #endif | |
296 | } | |
297 | ||
078e7b4a JB |
298 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
299 | "Read a character from the command input (keyboard or macro).\n\ | |
e51e47f7 JB |
300 | It is returned as a number.\n\ |
301 | If the user generates an event which is not a character (i.e. a mouse\n\ | |
e37c0805 JB |
302 | click or function key event), `read-char' signals an error. As an\n\ |
303 | exception, switch-frame events are put off until non-ASCII events can\n\ | |
304 | be read.\n\ | |
305 | If you want to read non-character events, or ignore them, call\n\ | |
306 | `read-event' or `read-char-exclusive' instead.") | |
078e7b4a JB |
307 | () |
308 | { | |
f42be754 | 309 | return read_filtered_event (1, 1, 1); |
078e7b4a JB |
310 | } |
311 | ||
078e7b4a JB |
312 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
313 | "Read an event object from the input stream.") | |
314 | () | |
315 | { | |
f42be754 | 316 | return read_filtered_event (0, 0, 0); |
078e7b4a JB |
317 | } |
318 | ||
319 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, | |
320 | "Read a character from the command input (keyboard or macro).\n\ | |
321 | It is returned as a number. Non character events are ignored.") | |
322 | () | |
323 | { | |
f42be754 | 324 | return read_filtered_event (1, 1, 0); |
078e7b4a | 325 | } |
078e7b4a JB |
326 | |
327 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
328 | "Don't use this yourself.") | |
329 | () | |
330 | { | |
331 | register Lisp_Object val; | |
1805de4f | 332 | XSETINT (val, getc (instream)); |
078e7b4a JB |
333 | return val; |
334 | } | |
335 | \f | |
336 | static void readevalloop (); | |
337 | static Lisp_Object load_unwind (); | |
d2c6be7f | 338 | static Lisp_Object load_descriptor_unwind (); |
078e7b4a JB |
339 | |
340 | DEFUN ("load", Fload, Sload, 1, 4, 0, | |
341 | "Execute a file of Lisp code named FILE.\n\ | |
342 | First try FILE with `.elc' appended, then try with `.el',\n\ | |
343 | then try FILE unmodified.\n\ | |
344 | This function searches the directories in `load-path'.\n\ | |
345 | If optional second arg NOERROR is non-nil,\n\ | |
346 | report no error if FILE doesn't exist.\n\ | |
347 | Print messages at start and end of loading unless\n\ | |
348 | optional third arg NOMESSAGE is non-nil.\n\ | |
349 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ | |
350 | suffixes `.elc' or `.el' to the specified name FILE.\n\ | |
351 | Return t if file exists.") | |
352 | (str, noerror, nomessage, nosuffix) | |
353 | Lisp_Object str, noerror, nomessage, nosuffix; | |
354 | { | |
355 | register FILE *stream; | |
356 | register int fd = -1; | |
357 | register Lisp_Object lispstream; | |
078e7b4a JB |
358 | int count = specpdl_ptr - specpdl; |
359 | Lisp_Object temp; | |
360 | struct gcpro gcpro1; | |
361 | Lisp_Object found; | |
51ac6f83 RS |
362 | /* 1 means inhibit the message at the beginning. */ |
363 | int nomessage1 = 0; | |
c2225d00 | 364 | Lisp_Object handler; |
317073d5 | 365 | #ifdef DOS_NT |
23a71bd6 | 366 | char *dosmode = "rt"; |
317073d5 | 367 | #endif /* DOS_NT */ |
078e7b4a JB |
368 | |
369 | CHECK_STRING (str, 0); | |
078e7b4a | 370 | |
c2225d00 | 371 | /* If file name is magic, call the handler. */ |
a617e913 | 372 | handler = Ffind_file_name_handler (str, Qload); |
c2225d00 | 373 | if (!NILP (handler)) |
8a2c760a | 374 | return call5 (handler, Qload, str, noerror, nomessage, nosuffix); |
c2225d00 | 375 | |
07a0bda3 RS |
376 | /* Do this after the handler to avoid |
377 | the need to gcpro noerror, nomessage and nosuffix. | |
378 | (Below here, we care only whether they are nil or not.) */ | |
379 | str = Fsubstitute_in_file_name (str); | |
380 | ||
078e7b4a JB |
381 | /* Avoid weird lossage with null string as arg, |
382 | since it would try to load a directory as a Lisp file */ | |
383 | if (XSTRING (str)->size > 0) | |
384 | { | |
5a6e5452 | 385 | GCPRO1 (str); |
265a9e55 | 386 | fd = openp (Vload_path, str, !NILP (nosuffix) ? "" : ".elc:.el:", |
078e7b4a | 387 | &found, 0); |
5a6e5452 | 388 | UNGCPRO; |
078e7b4a JB |
389 | } |
390 | ||
391 | if (fd < 0) | |
392 | { | |
265a9e55 | 393 | if (NILP (noerror)) |
078e7b4a JB |
394 | while (1) |
395 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
396 | Fcons (str, Qnil))); | |
397 | else | |
398 | return Qnil; | |
399 | } | |
400 | ||
401 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), | |
402 | ".elc", 4)) | |
403 | { | |
404 | struct stat s1, s2; | |
405 | int result; | |
406 | ||
317073d5 | 407 | #ifdef DOS_NT |
23a71bd6 | 408 | dosmode = "rb"; |
317073d5 | 409 | #endif /* DOS_NT */ |
4ff37b08 | 410 | stat ((char *)XSTRING (found)->data, &s1); |
078e7b4a | 411 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
4ff37b08 | 412 | result = stat ((char *)XSTRING (found)->data, &s2); |
078e7b4a | 413 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
51ac6f83 RS |
414 | { |
415 | message ("Source file `%s' newer than byte-compiled file", | |
416 | XSTRING (found)->data); | |
417 | /* Don't immediately overwrite this message. */ | |
418 | if (!noninteractive) | |
419 | nomessage1 = 1; | |
420 | } | |
078e7b4a JB |
421 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
422 | } | |
423 | ||
317073d5 | 424 | #ifdef DOS_NT |
23a71bd6 RS |
425 | close (fd); |
426 | stream = fopen ((char *) XSTRING (found)->data, dosmode); | |
317073d5 | 427 | #else /* not DOS_NT */ |
078e7b4a | 428 | stream = fdopen (fd, "r"); |
317073d5 | 429 | #endif /* not DOS_NT */ |
078e7b4a JB |
430 | if (stream == 0) |
431 | { | |
432 | close (fd); | |
433 | error ("Failure to create stdio stream for %s", XSTRING (str)->data); | |
434 | } | |
435 | ||
51ac6f83 | 436 | if (NILP (nomessage) && !nomessage1) |
078e7b4a JB |
437 | message ("Loading %s...", XSTRING (str)->data); |
438 | ||
439 | GCPRO1 (str); | |
838abf56 KH |
440 | lispstream = Fcons (Qnil, Qnil); |
441 | XSETFASTINT (XCONS (lispstream)->car, (EMACS_UINT)stream >> 16); | |
442 | XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 443 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f | 444 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 445 | specbind (Qload_file_name, found); |
d2c6be7f RS |
446 | load_descriptor_list |
447 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 448 | load_in_progress++; |
ae321d28 | 449 | readevalloop (Qget_file_char, stream, str, Feval, 0); |
078e7b4a JB |
450 | unbind_to (count, Qnil); |
451 | ||
452 | /* Run any load-hooks for this file. */ | |
453 | temp = Fassoc (str, Vafter_load_alist); | |
265a9e55 | 454 | if (!NILP (temp)) |
078e7b4a JB |
455 | Fprogn (Fcdr (temp)); |
456 | UNGCPRO; | |
457 | ||
265a9e55 | 458 | if (!noninteractive && NILP (nomessage)) |
078e7b4a JB |
459 | message ("Loading %s...done", XSTRING (str)->data); |
460 | return Qt; | |
461 | } | |
462 | ||
463 | static Lisp_Object | |
464 | load_unwind (stream) /* used as unwind-protect function in load */ | |
465 | Lisp_Object stream; | |
466 | { | |
c8bdaa8c RS |
467 | fclose ((FILE *) (XFASTINT (XCONS (stream)->car) << 16 |
468 | | XFASTINT (XCONS (stream)->cdr))); | |
078e7b4a JB |
469 | if (--load_in_progress < 0) load_in_progress = 0; |
470 | return Qnil; | |
471 | } | |
472 | ||
d2c6be7f RS |
473 | static Lisp_Object |
474 | load_descriptor_unwind (oldlist) | |
475 | Lisp_Object oldlist; | |
476 | { | |
477 | load_descriptor_list = oldlist; | |
838abf56 | 478 | return Qnil; |
d2c6be7f RS |
479 | } |
480 | ||
481 | /* Close all descriptors in use for Floads. | |
482 | This is used when starting a subprocess. */ | |
483 | ||
484 | void | |
485 | close_load_descs () | |
486 | { | |
487 | Lisp_Object tail; | |
488 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) | |
489 | close (XFASTINT (XCONS (tail)->car)); | |
490 | } | |
078e7b4a JB |
491 | \f |
492 | static int | |
493 | complete_filename_p (pathname) | |
494 | Lisp_Object pathname; | |
495 | { | |
496 | register unsigned char *s = XSTRING (pathname)->data; | |
317073d5 RS |
497 | return (IS_DIRECTORY_SEP (s[0]) |
498 | || (XSTRING (pathname)->size > 2 | |
499 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) | |
078e7b4a JB |
500 | #ifdef ALTOS |
501 | || *s == '@' | |
502 | #endif | |
503 | #ifdef VMS | |
504 | || index (s, ':') | |
505 | #endif /* VMS */ | |
506 | ); | |
507 | } | |
508 | ||
509 | /* Search for a file whose name is STR, looking in directories | |
510 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
511 | SUFFIX is a string containing possible suffixes separated by colons. | |
512 | On success, returns a file descriptor. On failure, returns -1. | |
513 | ||
514 | EXEC_ONLY nonzero means don't open the files, | |
515 | just look for one that is executable. In this case, | |
516 | returns 1 on success. | |
517 | ||
518 | If STOREPTR is nonzero, it points to a slot where the name of | |
519 | the file actually found should be stored as a Lisp string. | |
520 | Nil is stored there on failure. */ | |
521 | ||
522 | int | |
523 | openp (path, str, suffix, storeptr, exec_only) | |
524 | Lisp_Object path, str; | |
525 | char *suffix; | |
526 | Lisp_Object *storeptr; | |
527 | int exec_only; | |
528 | { | |
529 | register int fd; | |
530 | int fn_size = 100; | |
531 | char buf[100]; | |
532 | register char *fn = buf; | |
533 | int absolute = 0; | |
534 | int want_size; | |
535 | register Lisp_Object filename; | |
536 | struct stat st; | |
5a6e5452 | 537 | struct gcpro gcpro1; |
078e7b4a | 538 | |
5a6e5452 | 539 | GCPRO1 (str); |
078e7b4a JB |
540 | if (storeptr) |
541 | *storeptr = Qnil; | |
542 | ||
543 | if (complete_filename_p (str)) | |
544 | absolute = 1; | |
545 | ||
265a9e55 | 546 | for (; !NILP (path); path = Fcdr (path)) |
078e7b4a JB |
547 | { |
548 | char *nsuffix; | |
549 | ||
550 | filename = Fexpand_file_name (str, Fcar (path)); | |
551 | if (!complete_filename_p (filename)) | |
552 | /* If there are non-absolute elts in PATH (eg ".") */ | |
553 | /* Of course, this could conceivably lose if luser sets | |
554 | default-directory to be something non-absolute... */ | |
555 | { | |
556 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
557 | if (!complete_filename_p (filename)) | |
558 | /* Give up on this path element! */ | |
559 | continue; | |
560 | } | |
561 | ||
562 | /* Calculate maximum size of any filename made from | |
563 | this path element/specified file name and any possible suffix. */ | |
564 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; | |
565 | if (fn_size < want_size) | |
566 | fn = (char *) alloca (fn_size = 100 + want_size); | |
567 | ||
568 | nsuffix = suffix; | |
569 | ||
570 | /* Loop over suffixes. */ | |
571 | while (1) | |
572 | { | |
573 | char *esuffix = (char *) index (nsuffix, ':'); | |
574 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); | |
575 | ||
576 | /* Concatenate path element/specified name with the suffix. */ | |
577 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); | |
578 | fn[XSTRING (filename)->size] = 0; | |
579 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ | |
580 | strncat (fn, nsuffix, lsuffix); | |
581 | ||
582 | /* Ignore file if it's a directory. */ | |
583 | if (stat (fn, &st) >= 0 | |
584 | && (st.st_mode & S_IFMT) != S_IFDIR) | |
585 | { | |
586 | /* Check that we can access or open it. */ | |
587 | if (exec_only) | |
588 | fd = (access (fn, X_OK) == 0) ? 1 : -1; | |
589 | else | |
f7d279f0 | 590 | fd = open (fn, O_RDONLY, 0); |
078e7b4a JB |
591 | |
592 | if (fd >= 0) | |
593 | { | |
594 | /* We succeeded; return this descriptor and filename. */ | |
595 | if (storeptr) | |
596 | *storeptr = build_string (fn); | |
5ef2a3c0 KH |
597 | UNGCPRO; |
598 | return fd; | |
078e7b4a JB |
599 | } |
600 | } | |
601 | ||
602 | /* Advance to next suffix. */ | |
603 | if (esuffix == 0) | |
604 | break; | |
605 | nsuffix += lsuffix + 1; | |
606 | } | |
5a6e5452 | 607 | if (absolute) |
5ef2a3c0 | 608 | break; |
078e7b4a JB |
609 | } |
610 | ||
5ef2a3c0 KH |
611 | UNGCPRO; |
612 | return -1; | |
078e7b4a JB |
613 | } |
614 | ||
615 | \f | |
ae321d28 RS |
616 | /* Merge the list we've accumulated of globals from the current input source |
617 | into the load_history variable. The details depend on whether | |
618 | the source has an associated file name or not. */ | |
619 | ||
620 | static void | |
621 | build_load_history (stream, source) | |
622 | FILE *stream; | |
623 | Lisp_Object source; | |
624 | { | |
625 | register Lisp_Object tail, prev, newelt; | |
626 | register Lisp_Object tem, tem2; | |
627 | register int foundit, loading; | |
628 | ||
8a1f1537 RS |
629 | /* Don't bother recording anything for preloaded files. */ |
630 | if (!NILP (Vpurify_flag)) | |
631 | return; | |
632 | ||
ae321d28 RS |
633 | loading = stream || !NARROWED; |
634 | ||
635 | tail = Vload_history; | |
636 | prev = Qnil; | |
637 | foundit = 0; | |
638 | while (!NILP (tail)) | |
639 | { | |
640 | tem = Fcar (tail); | |
641 | ||
642 | /* Find the feature's previous assoc list... */ | |
643 | if (!NILP (Fequal (source, Fcar (tem)))) | |
644 | { | |
645 | foundit = 1; | |
646 | ||
647 | /* If we're loading, remove it. */ | |
648 | if (loading) | |
649 | { | |
650 | if (NILP (prev)) | |
651 | Vload_history = Fcdr (tail); | |
652 | else | |
653 | Fsetcdr (prev, Fcdr (tail)); | |
654 | } | |
655 | ||
656 | /* Otherwise, cons on new symbols that are not already members. */ | |
657 | else | |
658 | { | |
659 | tem2 = Vcurrent_load_list; | |
660 | ||
661 | while (CONSP (tem2)) | |
662 | { | |
663 | newelt = Fcar (tem2); | |
664 | ||
665 | if (NILP (Fmemq (newelt, tem))) | |
666 | Fsetcar (tail, Fcons (Fcar (tem), | |
667 | Fcons (newelt, Fcdr (tem)))); | |
668 | ||
669 | tem2 = Fcdr (tem2); | |
670 | QUIT; | |
671 | } | |
672 | } | |
673 | } | |
674 | else | |
675 | prev = tail; | |
676 | tail = Fcdr (tail); | |
677 | QUIT; | |
678 | } | |
679 | ||
8a1f1537 RS |
680 | /* If we're loading, cons the new assoc onto the front of load-history, |
681 | the most-recently-loaded position. Also do this if we didn't find | |
682 | an existing member for the current source. */ | |
683 | if (loading || !foundit) | |
684 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
685 | Vload_history); | |
ae321d28 RS |
686 | } |
687 | ||
078e7b4a JB |
688 | Lisp_Object |
689 | unreadpure () /* Used as unwind-protect function in readevalloop */ | |
690 | { | |
691 | read_pure = 0; | |
692 | return Qnil; | |
693 | } | |
694 | ||
695 | static void | |
ae321d28 | 696 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
078e7b4a | 697 | Lisp_Object readcharfun; |
ae321d28 RS |
698 | FILE *stream; |
699 | Lisp_Object sourcename; | |
078e7b4a JB |
700 | Lisp_Object (*evalfun) (); |
701 | int printflag; | |
702 | { | |
703 | register int c; | |
704 | register Lisp_Object val; | |
705 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 706 | struct gcpro gcpro1; |
49cf7ff4 RS |
707 | struct buffer *b = 0; |
708 | ||
709 | if (BUFFERP (readcharfun)) | |
710 | b = XBUFFER (readcharfun); | |
711 | else if (MARKERP (readcharfun)) | |
712 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
713 | |
714 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 715 | specbind (Qcurrent_load_list, Qnil); |
078e7b4a | 716 | |
8a1f1537 | 717 | GCPRO1 (sourcename); |
ae321d28 | 718 | |
ae321d28 RS |
719 | LOADHIST_ATTACH (sourcename); |
720 | ||
078e7b4a JB |
721 | while (1) |
722 | { | |
49cf7ff4 RS |
723 | if (b != 0 && NILP (b->name)) |
724 | error ("Reading from killed buffer"); | |
725 | ||
078e7b4a JB |
726 | instream = stream; |
727 | c = READCHAR; | |
728 | if (c == ';') | |
729 | { | |
730 | while ((c = READCHAR) != '\n' && c != -1); | |
731 | continue; | |
732 | } | |
733 | if (c < 0) break; | |
6069d957 RS |
734 | |
735 | /* Ignore whitespace here, so we can detect eof. */ | |
736 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
737 | continue; | |
078e7b4a | 738 | |
265a9e55 | 739 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 740 | { |
0e326373 | 741 | int count1 = specpdl_ptr - specpdl; |
078e7b4a JB |
742 | record_unwind_protect (unreadpure, Qnil); |
743 | val = read_list (-1, readcharfun); | |
0e326373 | 744 | unbind_to (count1, Qnil); |
078e7b4a JB |
745 | } |
746 | else | |
747 | { | |
748 | UNREAD (c); | |
84a15045 RS |
749 | if (NILP (Vload_read_function)) |
750 | val = read0 (readcharfun); | |
751 | else | |
752 | val = call1 (Vload_read_function, readcharfun); | |
078e7b4a JB |
753 | } |
754 | ||
755 | val = (*evalfun) (val); | |
756 | if (printflag) | |
757 | { | |
758 | Vvalues = Fcons (val, Vvalues); | |
759 | if (EQ (Vstandard_output, Qt)) | |
760 | Fprin1 (val, Qnil); | |
761 | else | |
762 | Fprint (val, Qnil); | |
763 | } | |
764 | } | |
765 | ||
ae321d28 | 766 | build_load_history (stream, sourcename); |
ae321d28 RS |
767 | UNGCPRO; |
768 | ||
078e7b4a JB |
769 | unbind_to (count, Qnil); |
770 | } | |
771 | ||
772 | #ifndef standalone | |
773 | ||
e5d77022 | 774 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
94b304d7 RS |
775 | "Execute the current buffer as Lisp code.\n\ |
776 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ | |
777 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ | |
778 | PRINTFLAG controls printing of output:\n\ | |
228d4b1c JA |
779 | nil means discard it; anything else is stream for print.\n\ |
780 | \n\ | |
781 | If there is no error, point does not move. If there is an error,\n\ | |
782 | point remains at the end of the last character read from the buffer.") | |
783 | (bufname, printflag) | |
784 | Lisp_Object bufname, printflag; | |
785 | { | |
786 | int count = specpdl_ptr - specpdl; | |
787 | Lisp_Object tem, buf; | |
788 | ||
dfdb645c | 789 | if (NILP (bufname)) |
228d4b1c JA |
790 | buf = Fcurrent_buffer (); |
791 | else | |
792 | buf = Fget_buffer (bufname); | |
dfdb645c | 793 | if (NILP (buf)) |
228d4b1c JA |
794 | error ("No such buffer."); |
795 | ||
dfdb645c | 796 | if (NILP (printflag)) |
228d4b1c JA |
797 | tem = Qsymbolp; |
798 | else | |
799 | tem = printflag; | |
800 | specbind (Qstandard_output, tem); | |
801 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
802 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
ae321d28 | 803 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
cb09ab7a | 804 | unbind_to (count, Qnil); |
228d4b1c JA |
805 | |
806 | return Qnil; | |
807 | } | |
808 | ||
809 | #if 0 | |
078e7b4a JB |
810 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
811 | "Execute the current buffer as Lisp code.\n\ | |
812 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ | |
813 | nil means discard it; anything else is stream for print.\n\ | |
814 | \n\ | |
815 | If there is no error, point does not move. If there is an error,\n\ | |
816 | point remains at the end of the last character read from the buffer.") | |
817 | (printflag) | |
818 | Lisp_Object printflag; | |
819 | { | |
820 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
821 | Lisp_Object tem, cbuf; |
822 | ||
823 | cbuf = Fcurrent_buffer () | |
078e7b4a | 824 | |
265a9e55 | 825 | if (NILP (printflag)) |
078e7b4a JB |
826 | tem = Qsymbolp; |
827 | else | |
828 | tem = printflag; | |
829 | specbind (Qstandard_output, tem); | |
830 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
831 | SET_PT (BEGV); | |
ae321d28 | 832 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
833 | return unbind_to (count, Qnil); |
834 | } | |
228d4b1c | 835 | #endif |
078e7b4a JB |
836 | |
837 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", | |
838 | "Execute the region as Lisp code.\n\ | |
839 | When called from programs, expects two arguments,\n\ | |
840 | giving starting and ending indices in the current buffer\n\ | |
841 | of the text to be executed.\n\ | |
842 | Programs can pass third argument PRINTFLAG which controls output:\n\ | |
843 | nil means discard it; anything else is stream for printing it.\n\ | |
844 | \n\ | |
845 | If there is no error, point does not move. If there is an error,\n\ | |
846 | point remains at the end of the last character read from the buffer.") | |
847 | (b, e, printflag) | |
848 | Lisp_Object b, e, printflag; | |
849 | { | |
850 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
851 | Lisp_Object tem, cbuf; |
852 | ||
853 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 854 | |
265a9e55 | 855 | if (NILP (printflag)) |
078e7b4a JB |
856 | tem = Qsymbolp; |
857 | else | |
858 | tem = printflag; | |
859 | specbind (Qstandard_output, tem); | |
860 | ||
265a9e55 | 861 | if (NILP (printflag)) |
078e7b4a JB |
862 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
863 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
864 | ||
865 | /* This both uses b and checks its type. */ | |
866 | Fgoto_char (b); | |
867 | Fnarrow_to_region (make_number (BEGV), e); | |
ae321d28 | 868 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
869 | |
870 | return unbind_to (count, Qnil); | |
871 | } | |
872 | ||
873 | #endif /* standalone */ | |
874 | \f | |
875 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
876 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ | |
877 | If STREAM is nil, use the value of `standard-input' (which see).\n\ | |
878 | STREAM or the value of `standard-input' may be:\n\ | |
879 | a buffer (read from point and advance it)\n\ | |
880 | a marker (read from where it points and advance it)\n\ | |
881 | a function (call it with no arguments for each character,\n\ | |
882 | call it with a char as argument to push a char back)\n\ | |
883 | a string (takes text from string, starting at the beginning)\n\ | |
884 | t (read text line using minibuffer and use it).") | |
885 | (readcharfun) | |
886 | Lisp_Object readcharfun; | |
887 | { | |
888 | extern Lisp_Object Fread_minibuffer (); | |
889 | ||
265a9e55 | 890 | if (NILP (readcharfun)) |
078e7b4a JB |
891 | readcharfun = Vstandard_input; |
892 | if (EQ (readcharfun, Qt)) | |
893 | readcharfun = Qread_char; | |
894 | ||
895 | #ifndef standalone | |
896 | if (EQ (readcharfun, Qread_char)) | |
897 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); | |
898 | #endif | |
899 | ||
cfff016d | 900 | if (STRINGP (readcharfun)) |
078e7b4a JB |
901 | return Fcar (Fread_from_string (readcharfun, Qnil, Qnil)); |
902 | ||
903 | return read0 (readcharfun); | |
904 | } | |
905 | ||
906 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
907 | "Read one Lisp expression which is represented as text by STRING.\n\ | |
908 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ | |
909 | START and END optionally delimit a substring of STRING from which to read;\n\ | |
910 | they default to 0 and (length STRING) respectively.") | |
911 | (string, start, end) | |
912 | Lisp_Object string, start, end; | |
913 | { | |
914 | int startval, endval; | |
915 | Lisp_Object tem; | |
916 | ||
917 | CHECK_STRING (string,0); | |
918 | ||
265a9e55 | 919 | if (NILP (end)) |
078e7b4a JB |
920 | endval = XSTRING (string)->size; |
921 | else | |
922 | { CHECK_NUMBER (end,2); | |
923 | endval = XINT (end); | |
924 | if (endval < 0 || endval > XSTRING (string)->size) | |
925 | args_out_of_range (string, end); | |
926 | } | |
927 | ||
265a9e55 | 928 | if (NILP (start)) |
078e7b4a JB |
929 | startval = 0; |
930 | else | |
931 | { CHECK_NUMBER (start,1); | |
932 | startval = XINT (start); | |
933 | if (startval < 0 || startval > endval) | |
934 | args_out_of_range (string, start); | |
935 | } | |
936 | ||
937 | read_from_string_index = startval; | |
938 | read_from_string_limit = endval; | |
939 | ||
940 | tem = read0 (string); | |
941 | return Fcons (tem, make_number (read_from_string_index)); | |
942 | } | |
943 | \f | |
6428369f KH |
944 | /* Use this for recursive reads, in contexts where internal tokens |
945 | are not allowed. */ | |
078e7b4a JB |
946 | static Lisp_Object |
947 | read0 (readcharfun) | |
948 | Lisp_Object readcharfun; | |
949 | { | |
950 | register Lisp_Object val; | |
951 | char c; | |
952 | ||
6428369f KH |
953 | val = read1 (readcharfun, &c); |
954 | if (c) | |
955 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); | |
078e7b4a JB |
956 | |
957 | return val; | |
958 | } | |
959 | \f | |
960 | static int read_buffer_size; | |
961 | static char *read_buffer; | |
962 | ||
963 | static int | |
964 | read_escape (readcharfun) | |
965 | Lisp_Object readcharfun; | |
966 | { | |
967 | register int c = READCHAR; | |
968 | switch (c) | |
969 | { | |
970 | case 'a': | |
265a9e55 | 971 | return '\007'; |
078e7b4a JB |
972 | case 'b': |
973 | return '\b'; | |
f405a585 RS |
974 | case 'd': |
975 | return 0177; | |
078e7b4a JB |
976 | case 'e': |
977 | return 033; | |
978 | case 'f': | |
979 | return '\f'; | |
980 | case 'n': | |
981 | return '\n'; | |
982 | case 'r': | |
983 | return '\r'; | |
984 | case 't': | |
985 | return '\t'; | |
986 | case 'v': | |
987 | return '\v'; | |
988 | case '\n': | |
989 | return -1; | |
990 | ||
991 | case 'M': | |
992 | c = READCHAR; | |
993 | if (c != '-') | |
994 | error ("Invalid escape character syntax"); | |
995 | c = READCHAR; | |
996 | if (c == '\\') | |
997 | c = read_escape (readcharfun); | |
7bd279cd | 998 | return c | meta_modifier; |
f405a585 RS |
999 | |
1000 | case 'S': | |
1001 | c = READCHAR; | |
1002 | if (c != '-') | |
1003 | error ("Invalid escape character syntax"); | |
1004 | c = READCHAR; | |
1005 | if (c == '\\') | |
1006 | c = read_escape (readcharfun); | |
e6e332b9 RS |
1007 | if ((c & 0xff) >= 'a' && (c & 0xff) <= 'z') |
1008 | return c - ('a' - 'A'); | |
7bd279cd RS |
1009 | return c | shift_modifier; |
1010 | ||
1011 | case 'H': | |
1012 | c = READCHAR; | |
1013 | if (c != '-') | |
1014 | error ("Invalid escape character syntax"); | |
1015 | c = READCHAR; | |
1016 | if (c == '\\') | |
1017 | c = read_escape (readcharfun); | |
1018 | return c | hyper_modifier; | |
1019 | ||
1020 | case 'A': | |
1021 | c = READCHAR; | |
1022 | if (c != '-') | |
1023 | error ("Invalid escape character syntax"); | |
1024 | c = READCHAR; | |
1025 | if (c == '\\') | |
1026 | c = read_escape (readcharfun); | |
1027 | return c | alt_modifier; | |
1028 | ||
1029 | case 's': | |
1030 | c = READCHAR; | |
1031 | if (c != '-') | |
1032 | error ("Invalid escape character syntax"); | |
1033 | c = READCHAR; | |
1034 | if (c == '\\') | |
1035 | c = read_escape (readcharfun); | |
1036 | return c | super_modifier; | |
078e7b4a JB |
1037 | |
1038 | case 'C': | |
1039 | c = READCHAR; | |
1040 | if (c != '-') | |
1041 | error ("Invalid escape character syntax"); | |
1042 | case '^': | |
1043 | c = READCHAR; | |
1044 | if (c == '\\') | |
1045 | c = read_escape (readcharfun); | |
f405a585 RS |
1046 | if ((c & 0177) == '?') |
1047 | return 0177 | c; | |
1048 | /* ASCII control chars are made from letters (both cases), | |
1049 | as well as the non-letters within 0100...0137. */ | |
1050 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1051 | return (c & (037 | ~0177)); | |
1052 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1053 | return (c & (037 | ~0177)); | |
078e7b4a | 1054 | else |
7bd279cd | 1055 | return c | ctrl_modifier; |
078e7b4a JB |
1056 | |
1057 | case '0': | |
1058 | case '1': | |
1059 | case '2': | |
1060 | case '3': | |
1061 | case '4': | |
1062 | case '5': | |
1063 | case '6': | |
1064 | case '7': | |
1065 | /* An octal escape, as in ANSI C. */ | |
1066 | { | |
1067 | register int i = c - '0'; | |
1068 | register int count = 0; | |
1069 | while (++count < 3) | |
1070 | { | |
1071 | if ((c = READCHAR) >= '0' && c <= '7') | |
1072 | { | |
1073 | i *= 8; | |
1074 | i += c - '0'; | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | UNREAD (c); | |
1079 | break; | |
1080 | } | |
1081 | } | |
1082 | return i; | |
1083 | } | |
1084 | ||
1085 | case 'x': | |
1086 | /* A hex escape, as in ANSI C. */ | |
1087 | { | |
1088 | int i = 0; | |
1089 | while (1) | |
1090 | { | |
1091 | c = READCHAR; | |
1092 | if (c >= '0' && c <= '9') | |
1093 | { | |
1094 | i *= 16; | |
1095 | i += c - '0'; | |
1096 | } | |
1097 | else if ((c >= 'a' && c <= 'f') | |
1098 | || (c >= 'A' && c <= 'F')) | |
1099 | { | |
1100 | i *= 16; | |
1101 | if (c >= 'a' && c <= 'f') | |
1102 | i += c - 'a' + 10; | |
1103 | else | |
1104 | i += c - 'A' + 10; | |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | UNREAD (c); | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | return i; | |
1113 | } | |
1114 | ||
1115 | default: | |
1116 | return c; | |
1117 | } | |
1118 | } | |
1119 | ||
6428369f KH |
1120 | /* If the next token is ')' or ']' or '.', we store that character |
1121 | in *PCH and the return value is not interesting. Else, we store | |
1122 | zero in *PCH and we read and return one lisp object. */ | |
078e7b4a | 1123 | static Lisp_Object |
6428369f | 1124 | read1 (readcharfun, pch) |
078e7b4a | 1125 | register Lisp_Object readcharfun; |
6428369f | 1126 | char *pch; |
078e7b4a JB |
1127 | { |
1128 | register int c; | |
6428369f | 1129 | *pch = 0; |
078e7b4a JB |
1130 | |
1131 | retry: | |
1132 | ||
1133 | c = READCHAR; | |
1134 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1135 | ||
1136 | switch (c) | |
1137 | { | |
1138 | case '(': | |
1139 | return read_list (0, readcharfun); | |
1140 | ||
1141 | case '[': | |
1142 | return read_vector (readcharfun); | |
1143 | ||
1144 | case ')': | |
1145 | case ']': | |
078e7b4a | 1146 | { |
6428369f KH |
1147 | *pch = c; |
1148 | return Qnil; | |
078e7b4a JB |
1149 | } |
1150 | ||
1151 | case '#': | |
200f684e RS |
1152 | c = READCHAR; |
1153 | if (c == '[') | |
1154 | { | |
1155 | /* Accept compiled functions at read-time so that we don't have to | |
1156 | build them using function calls. */ | |
748ef62f RS |
1157 | Lisp_Object tmp; |
1158 | tmp = read_vector (readcharfun); | |
1159 | return Fmake_byte_code (XVECTOR (tmp)->size, | |
1160 | XVECTOR (tmp)->contents); | |
200f684e | 1161 | } |
748ef62f RS |
1162 | #ifdef USE_TEXT_PROPERTIES |
1163 | if (c == '(') | |
1164 | { | |
1165 | Lisp_Object tmp; | |
1166 | struct gcpro gcpro1; | |
6428369f | 1167 | char ch; |
748ef62f RS |
1168 | |
1169 | /* Read the string itself. */ | |
6428369f KH |
1170 | tmp = read1 (readcharfun, &ch); |
1171 | if (ch != 0 || !STRINGP (tmp)) | |
748ef62f RS |
1172 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
1173 | GCPRO1 (tmp); | |
1174 | /* Read the intervals and their properties. */ | |
1175 | while (1) | |
1176 | { | |
1177 | Lisp_Object beg, end, plist; | |
1178 | ||
6428369f KH |
1179 | beg = read1 (readcharfun, &ch); |
1180 | if (ch == ')') | |
1181 | break; | |
1182 | if (ch == 0) | |
1183 | end = read1 (readcharfun, &ch); | |
1184 | if (ch == 0) | |
1185 | plist = read1 (readcharfun, &ch); | |
1186 | if (ch) | |
748ef62f | 1187 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
1188 | Fcons (build_string ("invalid string property list"), |
1189 | Qnil)); | |
748ef62f RS |
1190 | Fset_text_properties (beg, end, plist, tmp); |
1191 | } | |
1192 | UNGCPRO; | |
1193 | return tmp; | |
1194 | } | |
1195 | #endif | |
20ea2964 RS |
1196 | /* #@NUMBER is used to skip NUMBER following characters. |
1197 | That's used in .elc files to skip over doc strings | |
1198 | and function definitions. */ | |
1199 | if (c == '@') | |
1200 | { | |
1201 | int i, nskip = 0; | |
1202 | ||
1203 | /* Read a decimal integer. */ | |
1204 | while ((c = READCHAR) >= 0 | |
1205 | && c >= '0' && c <= '9') | |
1206 | { | |
1207 | nskip *= 10; | |
1208 | nskip += c - '0'; | |
1209 | } | |
1210 | if (c >= 0) | |
1211 | UNREAD (c); | |
1212 | ||
1213 | /* Skip that many characters. */ | |
1214 | for (i = 0; i < nskip && c >= 0; i++) | |
1215 | c = READCHAR; | |
1216 | goto retry; | |
1217 | } | |
1218 | if (c == '$') | |
1219 | return Vload_file_name; | |
1220 | ||
200f684e | 1221 | UNREAD (c); |
748ef62f | 1222 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
1223 | |
1224 | case ';': | |
1225 | while ((c = READCHAR) >= 0 && c != '\n'); | |
1226 | goto retry; | |
1227 | ||
1228 | case '\'': | |
1229 | { | |
1230 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
1231 | } | |
1232 | ||
1233 | case '?': | |
1234 | { | |
1235 | register Lisp_Object val; | |
1236 | ||
1237 | c = READCHAR; | |
1238 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1239 | ||
1240 | if (c == '\\') | |
1805de4f | 1241 | XSETINT (val, read_escape (readcharfun)); |
078e7b4a | 1242 | else |
1805de4f | 1243 | XSETINT (val, c); |
078e7b4a JB |
1244 | |
1245 | return val; | |
1246 | } | |
1247 | ||
1248 | case '\"': | |
1249 | { | |
1250 | register char *p = read_buffer; | |
1251 | register char *end = read_buffer + read_buffer_size; | |
1252 | register int c; | |
1253 | int cancel = 0; | |
1254 | ||
1255 | while ((c = READCHAR) >= 0 | |
1256 | && c != '\"') | |
1257 | { | |
1258 | if (p == end) | |
1259 | { | |
1260 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1261 | p += new - read_buffer; | |
1262 | read_buffer += new - read_buffer; | |
1263 | end = read_buffer + read_buffer_size; | |
1264 | } | |
1265 | if (c == '\\') | |
1266 | c = read_escape (readcharfun); | |
1267 | /* c is -1 if \ newline has just been seen */ | |
f405a585 | 1268 | if (c == -1) |
078e7b4a JB |
1269 | { |
1270 | if (p == read_buffer) | |
1271 | cancel = 1; | |
1272 | } | |
1273 | else | |
f943104a | 1274 | { |
988c2f83 RS |
1275 | /* Allow `\C- ' and `\C-?'. */ |
1276 | if (c == (CHAR_CTL | ' ')) | |
1277 | c = 0; | |
1278 | else if (c == (CHAR_CTL | '?')) | |
1279 | c = 127; | |
1280 | ||
f943104a KH |
1281 | if (c & CHAR_META) |
1282 | /* Move the meta bit to the right place for a string. */ | |
1283 | c = (c & ~CHAR_META) | 0x80; | |
1284 | if (c & ~0xff) | |
1285 | error ("Invalid modifier in string"); | |
1286 | *p++ = c; | |
1287 | } | |
078e7b4a JB |
1288 | } |
1289 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1290 | ||
1291 | /* If purifying, and string starts with \ newline, | |
1292 | return zero instead. This is for doc strings | |
08564963 | 1293 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 1294 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
1295 | return make_number (0); |
1296 | ||
1297 | if (read_pure) | |
1298 | return make_pure_string (read_buffer, p - read_buffer); | |
1299 | else | |
1300 | return make_string (read_buffer, p - read_buffer); | |
1301 | } | |
1302 | ||
109d300c JB |
1303 | case '.': |
1304 | { | |
1305 | #ifdef LISP_FLOAT_TYPE | |
1306 | /* If a period is followed by a number, then we should read it | |
1307 | as a floating point number. Otherwise, it denotes a dotted | |
1308 | pair. */ | |
1309 | int next_char = READCHAR; | |
1310 | UNREAD (next_char); | |
1311 | ||
075027b1 | 1312 | if (! (next_char >= '0' && next_char <= '9')) |
109d300c JB |
1313 | #endif |
1314 | { | |
6428369f KH |
1315 | *pch = c; |
1316 | return Qnil; | |
109d300c JB |
1317 | } |
1318 | ||
1319 | /* Otherwise, we fall through! Note that the atom-reading loop | |
1320 | below will now loop at least once, assuring that we will not | |
1321 | try to UNREAD two characters in a row. */ | |
1322 | } | |
078e7b4a JB |
1323 | default: |
1324 | if (c <= 040) goto retry; | |
1325 | { | |
1326 | register char *p = read_buffer; | |
481c6336 | 1327 | int quoted = 0; |
078e7b4a JB |
1328 | |
1329 | { | |
1330 | register char *end = read_buffer + read_buffer_size; | |
1331 | ||
1332 | while (c > 040 && | |
1333 | !(c == '\"' || c == '\'' || c == ';' || c == '?' | |
1334 | || c == '(' || c == ')' | |
109d300c JB |
1335 | #ifndef LISP_FLOAT_TYPE |
1336 | /* If we have floating-point support, then we need | |
1337 | to allow <digits><dot><digits>. */ | |
078e7b4a JB |
1338 | || c =='.' |
1339 | #endif /* not LISP_FLOAT_TYPE */ | |
1340 | || c == '[' || c == ']' || c == '#' | |
1341 | )) | |
1342 | { | |
1343 | if (p == end) | |
1344 | { | |
1345 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1346 | p += new - read_buffer; | |
1347 | read_buffer += new - read_buffer; | |
1348 | end = read_buffer + read_buffer_size; | |
1349 | } | |
1350 | if (c == '\\') | |
481c6336 RS |
1351 | { |
1352 | c = READCHAR; | |
1353 | quoted = 1; | |
1354 | } | |
078e7b4a JB |
1355 | *p++ = c; |
1356 | c = READCHAR; | |
1357 | } | |
1358 | ||
1359 | if (p == end) | |
1360 | { | |
1361 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1362 | p += new - read_buffer; | |
1363 | read_buffer += new - read_buffer; | |
1364 | /* end = read_buffer + read_buffer_size; */ | |
1365 | } | |
1366 | *p = 0; | |
1367 | if (c >= 0) | |
1368 | UNREAD (c); | |
1369 | } | |
1370 | ||
481c6336 RS |
1371 | if (!quoted) |
1372 | { | |
1373 | register char *p1; | |
1374 | register Lisp_Object val; | |
1375 | p1 = read_buffer; | |
1376 | if (*p1 == '+' || *p1 == '-') p1++; | |
1377 | /* Is it an integer? */ | |
1378 | if (p1 != p) | |
1379 | { | |
1380 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
dbc4e1c1 | 1381 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1382 | /* Integers can have trailing decimal points. */ |
1383 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
dbc4e1c1 | 1384 | #endif |
481c6336 RS |
1385 | if (p1 == p) |
1386 | /* It is an integer. */ | |
1387 | { | |
dbc4e1c1 | 1388 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1389 | if (p1[-1] == '.') |
1390 | p1[-1] = '\0'; | |
dbc4e1c1 | 1391 | #endif |
1805de4f | 1392 | XSETINT (val, atoi (read_buffer)); |
481c6336 RS |
1393 | return val; |
1394 | } | |
1395 | } | |
078e7b4a | 1396 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1397 | if (isfloat_string (read_buffer)) |
1398 | return make_float (atof (read_buffer)); | |
078e7b4a | 1399 | #endif |
481c6336 | 1400 | } |
078e7b4a JB |
1401 | |
1402 | return intern (read_buffer); | |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | \f | |
1407 | #ifdef LISP_FLOAT_TYPE | |
1408 | ||
078e7b4a JB |
1409 | #define LEAD_INT 1 |
1410 | #define DOT_CHAR 2 | |
1411 | #define TRAIL_INT 4 | |
1412 | #define E_CHAR 8 | |
1413 | #define EXP_INT 16 | |
1414 | ||
1415 | int | |
1416 | isfloat_string (cp) | |
1417 | register char *cp; | |
1418 | { | |
1419 | register state; | |
1420 | ||
1421 | state = 0; | |
1422 | if (*cp == '+' || *cp == '-') | |
1423 | cp++; | |
1424 | ||
075027b1 | 1425 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1426 | { |
1427 | state |= LEAD_INT; | |
075027b1 RS |
1428 | while (*cp >= '0' && *cp <= '9') |
1429 | cp++; | |
078e7b4a JB |
1430 | } |
1431 | if (*cp == '.') | |
1432 | { | |
1433 | state |= DOT_CHAR; | |
1434 | cp++; | |
1435 | } | |
075027b1 | 1436 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1437 | { |
1438 | state |= TRAIL_INT; | |
075027b1 | 1439 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1440 | cp++; |
1441 | } | |
1442 | if (*cp == 'e') | |
1443 | { | |
1444 | state |= E_CHAR; | |
1445 | cp++; | |
1446 | } | |
1447 | if ((*cp == '+') || (*cp == '-')) | |
1448 | cp++; | |
1449 | ||
075027b1 | 1450 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1451 | { |
1452 | state |= EXP_INT; | |
075027b1 | 1453 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1454 | cp++; |
1455 | } | |
37579d7c | 1456 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
078e7b4a | 1457 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
151bdc83 | 1458 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 1459 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
1460 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
1461 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a JB |
1462 | } |
1463 | #endif /* LISP_FLOAT_TYPE */ | |
1464 | \f | |
1465 | static Lisp_Object | |
1466 | read_vector (readcharfun) | |
1467 | Lisp_Object readcharfun; | |
1468 | { | |
1469 | register int i; | |
1470 | register int size; | |
1471 | register Lisp_Object *ptr; | |
1472 | register Lisp_Object tem, vector; | |
1473 | register struct Lisp_Cons *otem; | |
1474 | Lisp_Object len; | |
1475 | ||
1476 | tem = read_list (1, readcharfun); | |
1477 | len = Flength (tem); | |
1478 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
1479 | ||
1480 | ||
1481 | size = XVECTOR (vector)->size; | |
1482 | ptr = XVECTOR (vector)->contents; | |
1483 | for (i = 0; i < size; i++) | |
1484 | { | |
1485 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); | |
1486 | otem = XCONS (tem); | |
1487 | tem = Fcdr (tem); | |
1488 | free_cons (otem); | |
1489 | } | |
1490 | return vector; | |
1491 | } | |
1492 | ||
1493 | /* flag = 1 means check for ] to terminate rather than ) and . | |
1494 | flag = -1 means check for starting with defun | |
1495 | and make structure pure. */ | |
1496 | ||
1497 | static Lisp_Object | |
1498 | read_list (flag, readcharfun) | |
1499 | int flag; | |
1500 | register Lisp_Object readcharfun; | |
1501 | { | |
1502 | /* -1 means check next element for defun, | |
1503 | 0 means don't check, | |
1504 | 1 means already checked and found defun. */ | |
1505 | int defunflag = flag < 0 ? -1 : 0; | |
1506 | Lisp_Object val, tail; | |
1507 | register Lisp_Object elt, tem; | |
1508 | struct gcpro gcpro1, gcpro2; | |
20ea2964 | 1509 | int cancel = 0; |
078e7b4a JB |
1510 | |
1511 | val = Qnil; | |
1512 | tail = Qnil; | |
1513 | ||
1514 | while (1) | |
1515 | { | |
6428369f | 1516 | char ch; |
078e7b4a | 1517 | GCPRO2 (val, tail); |
6428369f | 1518 | elt = read1 (readcharfun, &ch); |
078e7b4a | 1519 | UNGCPRO; |
20ea2964 RS |
1520 | |
1521 | /* If purifying, and the list starts with #$, | |
1522 | return 0 instead. This is a doc string reference | |
1523 | and it will be replaced anyway by Snarf-documentation, | |
1524 | so don't waste pure space with it. */ | |
1525 | if (EQ (elt, Vload_file_name) | |
1526 | && !NILP (Vpurify_flag) && NILP (Vdoc_file_name)) | |
1527 | cancel = 1; | |
1528 | ||
6428369f | 1529 | if (ch) |
078e7b4a JB |
1530 | { |
1531 | if (flag > 0) | |
1532 | { | |
6428369f | 1533 | if (ch == ']') |
078e7b4a | 1534 | return val; |
6428369f | 1535 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (") or . in a vector", 18), Qnil)); |
078e7b4a | 1536 | } |
6428369f | 1537 | if (ch == ')') |
078e7b4a | 1538 | return val; |
6428369f | 1539 | if (ch == '.') |
078e7b4a JB |
1540 | { |
1541 | GCPRO2 (val, tail); | |
265a9e55 | 1542 | if (!NILP (tail)) |
078e7b4a JB |
1543 | XCONS (tail)->cdr = read0 (readcharfun); |
1544 | else | |
1545 | val = read0 (readcharfun); | |
6428369f | 1546 | read1 (readcharfun, &ch); |
078e7b4a | 1547 | UNGCPRO; |
6428369f | 1548 | if (ch == ')') |
20ea2964 | 1549 | return (cancel ? make_number (0) : val); |
078e7b4a JB |
1550 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
1551 | } | |
1552 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
1553 | } | |
1554 | tem = (read_pure && flag <= 0 | |
1555 | ? pure_cons (elt, Qnil) | |
1556 | : Fcons (elt, Qnil)); | |
265a9e55 | 1557 | if (!NILP (tail)) |
078e7b4a JB |
1558 | XCONS (tail)->cdr = tem; |
1559 | else | |
1560 | val = tem; | |
1561 | tail = tem; | |
1562 | if (defunflag < 0) | |
1563 | defunflag = EQ (elt, Qdefun); | |
1564 | else if (defunflag > 0) | |
1565 | read_pure = 1; | |
1566 | } | |
1567 | } | |
1568 | \f | |
1569 | Lisp_Object Vobarray; | |
1570 | Lisp_Object initial_obarray; | |
1571 | ||
d007f5c8 RS |
1572 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
1573 | ||
1574 | int oblookup_last_bucket_number; | |
1575 | ||
1576 | static int hash_string (); | |
1577 | Lisp_Object oblookup (); | |
1578 | ||
1579 | /* Get an error if OBARRAY is not an obarray. | |
1580 | If it is one, return it. */ | |
1581 | ||
078e7b4a JB |
1582 | Lisp_Object |
1583 | check_obarray (obarray) | |
1584 | Lisp_Object obarray; | |
1585 | { | |
cfff016d | 1586 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1587 | { |
1588 | /* If Vobarray is now invalid, force it to be valid. */ | |
1589 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
1590 | ||
1591 | obarray = wrong_type_argument (Qvectorp, obarray); | |
1592 | } | |
1593 | return obarray; | |
1594 | } | |
1595 | ||
d007f5c8 RS |
1596 | /* Intern the C string STR: return a symbol with that name, |
1597 | interned in the current obarray. */ | |
078e7b4a JB |
1598 | |
1599 | Lisp_Object | |
1600 | intern (str) | |
1601 | char *str; | |
1602 | { | |
1603 | Lisp_Object tem; | |
1604 | int len = strlen (str); | |
153a17b7 | 1605 | Lisp_Object obarray; |
078e7b4a | 1606 | |
153a17b7 | 1607 | obarray = Vobarray; |
cfff016d | 1608 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1609 | obarray = check_obarray (obarray); |
1610 | tem = oblookup (obarray, str, len); | |
cfff016d | 1611 | if (SYMBOLP (tem)) |
078e7b4a | 1612 | return tem; |
265a9e55 | 1613 | return Fintern ((!NILP (Vpurify_flag) |
078e7b4a JB |
1614 | ? make_pure_string (str, len) |
1615 | : make_string (str, len)), | |
1616 | obarray); | |
1617 | } | |
d007f5c8 | 1618 | \f |
078e7b4a JB |
1619 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
1620 | "Return the canonical symbol whose name is STRING.\n\ | |
1621 | If there is none, one is created by this function and returned.\n\ | |
1622 | A second optional argument specifies the obarray to use;\n\ | |
1623 | it defaults to the value of `obarray'.") | |
1624 | (str, obarray) | |
1625 | Lisp_Object str, obarray; | |
1626 | { | |
1627 | register Lisp_Object tem, sym, *ptr; | |
1628 | ||
265a9e55 | 1629 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1630 | obarray = check_obarray (obarray); |
1631 | ||
1632 | CHECK_STRING (str, 0); | |
1633 | ||
1634 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1635 | if (!INTEGERP (tem)) |
078e7b4a JB |
1636 | return tem; |
1637 | ||
265a9e55 | 1638 | if (!NILP (Vpurify_flag)) |
078e7b4a JB |
1639 | str = Fpurecopy (str); |
1640 | sym = Fmake_symbol (str); | |
1641 | ||
1642 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; | |
cfff016d | 1643 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
1644 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
1645 | else | |
1646 | XSYMBOL (sym)->next = 0; | |
1647 | *ptr = sym; | |
1648 | return sym; | |
1649 | } | |
1650 | ||
1651 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
1652 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ | |
1653 | A second optional argument specifies the obarray to use;\n\ | |
1654 | it defaults to the value of `obarray'.") | |
1655 | (str, obarray) | |
1656 | Lisp_Object str, obarray; | |
1657 | { | |
1658 | register Lisp_Object tem; | |
1659 | ||
265a9e55 | 1660 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1661 | obarray = check_obarray (obarray); |
1662 | ||
1663 | CHECK_STRING (str, 0); | |
1664 | ||
1665 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1666 | if (!INTEGERP (tem)) |
078e7b4a JB |
1667 | return tem; |
1668 | return Qnil; | |
1669 | } | |
d007f5c8 RS |
1670 | \f |
1671 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, | |
1672 | "Delete the symbol named NAME, if any, from OBARRAY.\n\ | |
1673 | The value is t if a symbol was found and deleted, nil otherwise.\n\ | |
1674 | NAME may be a string or a symbol. If it is a symbol, that symbol\n\ | |
1675 | is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\ | |
1676 | OBARRAY defaults to the value of the variable `obarray'.") | |
1677 | (name, obarray) | |
1678 | Lisp_Object name, obarray; | |
1679 | { | |
1680 | register Lisp_Object string, tem; | |
1681 | int hash; | |
1682 | ||
1683 | if (NILP (obarray)) obarray = Vobarray; | |
1684 | obarray = check_obarray (obarray); | |
1685 | ||
1686 | if (SYMBOLP (name)) | |
1687 | XSETSTRING (string, XSYMBOL (name)->name); | |
1688 | else | |
1689 | { | |
1690 | CHECK_STRING (name, 0); | |
1691 | string = name; | |
1692 | } | |
1693 | ||
1694 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); | |
1695 | if (INTEGERP (tem)) | |
1696 | return Qnil; | |
1697 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
1698 | if (SYMBOLP (name) && !EQ (name, tem)) | |
1699 | return Qnil; | |
1700 | ||
1701 | hash = oblookup_last_bucket_number; | |
1702 | ||
1703 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
1704 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
1705 | else | |
1706 | { | |
1707 | Lisp_Object tail, following; | |
1708 | ||
1709 | for (tail = XVECTOR (obarray)->contents[hash]; | |
1710 | XSYMBOL (tail)->next; | |
1711 | tail = following) | |
1712 | { | |
1713 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
1714 | if (EQ (following, tem)) | |
1715 | { | |
1716 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
1717 | break; | |
1718 | } | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | return Qt; | |
1723 | } | |
1724 | \f | |
1725 | /* Return the symbol in OBARRAY whose names matches the string | |
1726 | of SIZE characters at PTR. If there is no such symbol in OBARRAY, | |
1727 | return nil. | |
1728 | ||
1729 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
1730 | |
1731 | Lisp_Object | |
d007f5c8 | 1732 | oblookup (obarray, ptr, size, hashp) |
078e7b4a JB |
1733 | Lisp_Object obarray; |
1734 | register char *ptr; | |
1735 | register int size; | |
d007f5c8 | 1736 | int *hashp; |
078e7b4a | 1737 | { |
7a70b397 RS |
1738 | int hash; |
1739 | int obsize; | |
078e7b4a JB |
1740 | register Lisp_Object tail; |
1741 | Lisp_Object bucket, tem; | |
1742 | ||
cfff016d | 1743 | if (!VECTORP (obarray) |
7c79a684 | 1744 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
1745 | { |
1746 | obarray = check_obarray (obarray); | |
1747 | obsize = XVECTOR (obarray)->size; | |
1748 | } | |
1749 | /* Combining next two lines breaks VMS C 2.3. */ | |
1750 | hash = hash_string (ptr, size); | |
1751 | hash %= obsize; | |
1752 | bucket = XVECTOR (obarray)->contents[hash]; | |
d007f5c8 | 1753 | oblookup_last_bucket_number = hash; |
078e7b4a JB |
1754 | if (XFASTINT (bucket) == 0) |
1755 | ; | |
cfff016d | 1756 | else if (!SYMBOLP (bucket)) |
078e7b4a | 1757 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
1758 | else |
1759 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 1760 | { |
d007f5c8 RS |
1761 | if (XSYMBOL (tail)->name->size == size |
1762 | && !bcmp (XSYMBOL (tail)->name->data, ptr, size)) | |
078e7b4a JB |
1763 | return tail; |
1764 | else if (XSYMBOL (tail)->next == 0) | |
1765 | break; | |
1766 | } | |
1805de4f | 1767 | XSETINT (tem, hash); |
078e7b4a JB |
1768 | return tem; |
1769 | } | |
1770 | ||
1771 | static int | |
1772 | hash_string (ptr, len) | |
1773 | unsigned char *ptr; | |
1774 | int len; | |
1775 | { | |
1776 | register unsigned char *p = ptr; | |
1777 | register unsigned char *end = p + len; | |
1778 | register unsigned char c; | |
1779 | register int hash = 0; | |
1780 | ||
1781 | while (p != end) | |
1782 | { | |
1783 | c = *p++; | |
1784 | if (c >= 0140) c -= 40; | |
1785 | hash = ((hash<<3) + (hash>>28) + c); | |
1786 | } | |
1787 | return hash & 07777777777; | |
1788 | } | |
d007f5c8 | 1789 | \f |
078e7b4a JB |
1790 | void |
1791 | map_obarray (obarray, fn, arg) | |
1792 | Lisp_Object obarray; | |
1793 | int (*fn) (); | |
1794 | Lisp_Object arg; | |
1795 | { | |
1796 | register int i; | |
1797 | register Lisp_Object tail; | |
1798 | CHECK_VECTOR (obarray, 1); | |
1799 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) | |
1800 | { | |
1801 | tail = XVECTOR (obarray)->contents[i]; | |
1802 | if (XFASTINT (tail) != 0) | |
1803 | while (1) | |
1804 | { | |
1805 | (*fn) (tail, arg); | |
1806 | if (XSYMBOL (tail)->next == 0) | |
1807 | break; | |
1805de4f | 1808 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
1809 | } |
1810 | } | |
1811 | } | |
1812 | ||
1813 | mapatoms_1 (sym, function) | |
1814 | Lisp_Object sym, function; | |
1815 | { | |
1816 | call1 (function, sym); | |
1817 | } | |
1818 | ||
1819 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
1820 | "Call FUNCTION on every symbol in OBARRAY.\n\ | |
1821 | OBARRAY defaults to the value of `obarray'.") | |
1822 | (function, obarray) | |
1823 | Lisp_Object function, obarray; | |
1824 | { | |
1825 | Lisp_Object tem; | |
1826 | ||
265a9e55 | 1827 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1828 | obarray = check_obarray (obarray); |
1829 | ||
1830 | map_obarray (obarray, mapatoms_1, function); | |
1831 | return Qnil; | |
1832 | } | |
1833 | ||
5e88a39e | 1834 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
1835 | |
1836 | void | |
1837 | init_obarray () | |
1838 | { | |
1839 | Lisp_Object oblength; | |
1840 | int hash; | |
1841 | Lisp_Object *tem; | |
1842 | ||
baf69866 | 1843 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a JB |
1844 | |
1845 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); | |
1846 | Vobarray = Fmake_vector (oblength, make_number (0)); | |
1847 | initial_obarray = Vobarray; | |
1848 | staticpro (&initial_obarray); | |
1849 | /* Intern nil in the obarray */ | |
1850 | /* These locals are to kludge around a pyramid compiler bug. */ | |
1851 | hash = hash_string ("nil", 3); | |
1852 | /* Separate statement here to avoid VAXC bug. */ | |
1853 | hash %= OBARRAY_SIZE; | |
1854 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
1855 | *tem = Qnil; | |
1856 | ||
1857 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); | |
1858 | XSYMBOL (Qnil)->function = Qunbound; | |
1859 | XSYMBOL (Qunbound)->value = Qunbound; | |
1860 | XSYMBOL (Qunbound)->function = Qunbound; | |
1861 | ||
1862 | Qt = intern ("t"); | |
1863 | XSYMBOL (Qnil)->value = Qnil; | |
1864 | XSYMBOL (Qnil)->plist = Qnil; | |
1865 | XSYMBOL (Qt)->value = Qt; | |
1866 | ||
1867 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
1868 | Vpurify_flag = Qt; | |
1869 | ||
1870 | Qvariable_documentation = intern ("variable-documentation"); | |
1871 | ||
1872 | read_buffer_size = 100; | |
1873 | read_buffer = (char *) malloc (read_buffer_size); | |
1874 | } | |
1875 | \f | |
1876 | void | |
1877 | defsubr (sname) | |
1878 | struct Lisp_Subr *sname; | |
1879 | { | |
1880 | Lisp_Object sym; | |
1881 | sym = intern (sname->symbol_name); | |
1805de4f | 1882 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1883 | } |
1884 | ||
1885 | #ifdef NOTDEF /* use fset in subr.el now */ | |
1886 | void | |
1887 | defalias (sname, string) | |
1888 | struct Lisp_Subr *sname; | |
1889 | char *string; | |
1890 | { | |
1891 | Lisp_Object sym; | |
1892 | sym = intern (string); | |
1805de4f | 1893 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1894 | } |
1895 | #endif /* NOTDEF */ | |
1896 | ||
078e7b4a | 1897 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 1898 | to a C variable of type int. Sample call: */ |
950c215d | 1899 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 1900 | void |
e9e00ff2 | 1901 | defvar_int (namestring, address) |
078e7b4a JB |
1902 | char *namestring; |
1903 | int *address; | |
078e7b4a | 1904 | { |
1a0f90f7 | 1905 | Lisp_Object sym, val; |
078e7b4a | 1906 | sym = intern (namestring); |
1a0f90f7 KH |
1907 | val = allocate_misc (); |
1908 | XMISC (val)->type = Lisp_Misc_Intfwd; | |
fc1e7df5 | 1909 | XINTFWD (val)->intvar = address; |
1a0f90f7 | 1910 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1911 | } |
1912 | ||
1913 | /* Similar but define a variable whose value is T if address contains 1, | |
1a0f90f7 | 1914 | NIL if address contains 0 */ |
078e7b4a | 1915 | void |
e9e00ff2 | 1916 | defvar_bool (namestring, address) |
078e7b4a JB |
1917 | char *namestring; |
1918 | int *address; | |
078e7b4a | 1919 | { |
1a0f90f7 | 1920 | Lisp_Object sym, val; |
078e7b4a | 1921 | sym = intern (namestring); |
1a0f90f7 KH |
1922 | val = allocate_misc (); |
1923 | XMISC (val)->type = Lisp_Misc_Boolfwd; | |
fc1e7df5 | 1924 | XBOOLFWD (val)->boolvar = address; |
1a0f90f7 | 1925 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1926 | } |
1927 | ||
1a0f90f7 KH |
1928 | /* Similar but define a variable whose value is the Lisp Object stored |
1929 | at address. Two versions: with and without gc-marking of the C | |
1930 | variable. The nopro version is used when that variable will be | |
1931 | gc-marked for some other reason, since marking the same slot twice | |
1932 | can cause trouble with strings. */ | |
078e7b4a | 1933 | void |
1a0f90f7 | 1934 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
1935 | char *namestring; |
1936 | Lisp_Object *address; | |
078e7b4a | 1937 | { |
1a0f90f7 | 1938 | Lisp_Object sym, val; |
078e7b4a | 1939 | sym = intern (namestring); |
1a0f90f7 KH |
1940 | val = allocate_misc (); |
1941 | XMISC (val)->type = Lisp_Misc_Objfwd; | |
fc1e7df5 | 1942 | XOBJFWD (val)->objvar = address; |
1a0f90f7 | 1943 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1944 | } |
1945 | ||
078e7b4a | 1946 | void |
1a0f90f7 | 1947 | defvar_lisp (namestring, address) |
078e7b4a JB |
1948 | char *namestring; |
1949 | Lisp_Object *address; | |
078e7b4a | 1950 | { |
1a0f90f7 KH |
1951 | defvar_lisp_nopro (namestring, address); |
1952 | staticpro (address); | |
078e7b4a JB |
1953 | } |
1954 | ||
1955 | #ifndef standalone | |
1956 | ||
1957 | /* Similar but define a variable whose value is the Lisp Object stored in | |
2836d9a4 KH |
1958 | the current buffer. address is the address of the slot in the buffer |
1959 | that is current now. */ | |
078e7b4a JB |
1960 | |
1961 | void | |
4360b0c6 | 1962 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
1963 | char *namestring; |
1964 | Lisp_Object *address; | |
4360b0c6 | 1965 | Lisp_Object type; |
078e7b4a JB |
1966 | char *doc; |
1967 | { | |
1a0f90f7 | 1968 | Lisp_Object sym, val; |
078e7b4a JB |
1969 | int offset; |
1970 | extern struct buffer buffer_local_symbols; | |
1971 | ||
1972 | sym = intern (namestring); | |
1a0f90f7 | 1973 | val = allocate_misc (); |
078e7b4a JB |
1974 | offset = (char *)address - (char *)current_buffer; |
1975 | ||
1a0f90f7 | 1976 | XMISC (val)->type = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 1977 | XBUFFER_OBJFWD (val)->offset = offset; |
1a0f90f7 | 1978 | XSYMBOL (sym)->value = val; |
078e7b4a | 1979 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; |
4360b0c6 | 1980 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
2836d9a4 | 1981 | if (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)) == 0) |
078e7b4a JB |
1982 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
1983 | slot of buffer_local_flags */ | |
1984 | abort (); | |
1985 | } | |
1986 | ||
1987 | #endif /* standalone */ | |
950c215d KH |
1988 | |
1989 | /* Similar but define a variable whose value is the Lisp Object stored | |
4ac38690 | 1990 | at a particular offset in the current kboard object. */ |
950c215d KH |
1991 | |
1992 | void | |
4ac38690 | 1993 | defvar_kboard (namestring, offset) |
950c215d KH |
1994 | char *namestring; |
1995 | int offset; | |
1996 | { | |
1997 | Lisp_Object sym, val; | |
1998 | sym = intern (namestring); | |
1999 | val = allocate_misc (); | |
4ac38690 KH |
2000 | XMISC (val)->type = Lisp_Misc_Kboard_Objfwd; |
2001 | XKBOARD_OBJFWD (val)->offset = offset; | |
950c215d KH |
2002 | XSYMBOL (sym)->value = val; |
2003 | } | |
078e7b4a | 2004 | \f |
279499f0 | 2005 | init_lread () |
078e7b4a | 2006 | { |
46947372 | 2007 | char *normal; |
078e7b4a | 2008 | |
279499f0 | 2009 | /* Compute the default load-path. */ |
46947372 JB |
2010 | #ifdef CANNOT_DUMP |
2011 | normal = PATH_LOADSEARCH; | |
e065a56e | 2012 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
2013 | #else |
2014 | if (NILP (Vpurify_flag)) | |
2015 | normal = PATH_LOADSEARCH; | |
279499f0 | 2016 | else |
46947372 | 2017 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 2018 | |
46947372 JB |
2019 | /* In a dumped Emacs, we normally have to reset the value of |
2020 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
2021 | uses ../lisp, instead of the path of the installed elisp | |
2022 | libraries. However, if it appears that Vload_path was changed | |
2023 | from the default before dumping, don't override that value. */ | |
4746118a JB |
2024 | if (initialized) |
2025 | { | |
2026 | Lisp_Object dump_path; | |
46947372 | 2027 | |
e065a56e | 2028 | dump_path = decode_env_path (0, PATH_DUMPLOADSEARCH); |
4746118a | 2029 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
2030 | { |
2031 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 2032 | if (!NILP (Vinstallation_directory)) |
80667d53 | 2033 | { |
74180aa4 | 2034 | /* Add to the path the lisp subdir of the |
3a3056e5 RS |
2035 | installation dir, if it exists. */ |
2036 | Lisp_Object tem, tem1; | |
74180aa4 RS |
2037 | tem = Fexpand_file_name (build_string ("lisp"), |
2038 | Vinstallation_directory); | |
3a3056e5 RS |
2039 | tem1 = Ffile_exists_p (tem); |
2040 | if (!NILP (tem1)) | |
2041 | { | |
2042 | if (NILP (Fmember (tem, Vload_path))) | |
2043 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
2044 | } | |
2045 | else | |
2046 | /* That dir doesn't exist, so add the build-time | |
2047 | Lisp dirs instead. */ | |
2048 | Vload_path = nconc2 (Vload_path, dump_path); | |
80667d53 RS |
2049 | } |
2050 | } | |
4746118a JB |
2051 | } |
2052 | else | |
e065a56e | 2053 | Vload_path = decode_env_path (0, normal); |
46947372 | 2054 | #endif |
279499f0 | 2055 | |
317073d5 RS |
2056 | #ifndef WINDOWSNT |
2057 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
2058 | almost never correct, thereby causing a warning to be printed out that | |
2059 | confuses users. Since PATH_LOADSEARCH is always overriden by the | |
2060 | EMACSLOADPATH environment variable below, disable the warning on NT. */ | |
2061 | ||
078e7b4a | 2062 | /* Warn if dirs in the *standard* path don't exist. */ |
46947372 JB |
2063 | { |
2064 | Lisp_Object path_tail; | |
078e7b4a | 2065 | |
46947372 JB |
2066 | for (path_tail = Vload_path; |
2067 | !NILP (path_tail); | |
2068 | path_tail = XCONS (path_tail)->cdr) | |
2069 | { | |
2070 | Lisp_Object dirfile; | |
2071 | dirfile = Fcar (path_tail); | |
cfff016d | 2072 | if (STRINGP (dirfile)) |
46947372 JB |
2073 | { |
2074 | dirfile = Fdirectory_file_name (dirfile); | |
2075 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
3a3056e5 RS |
2076 | fprintf (stderr, |
2077 | "Warning: Lisp directory `%s' does not exist.\n", | |
3917910a | 2078 | XSTRING (Fcar (path_tail))->data); |
46947372 JB |
2079 | } |
2080 | } | |
2081 | } | |
317073d5 | 2082 | #endif /* WINDOWSNT */ |
46947372 JB |
2083 | |
2084 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
2085 | This doesn't apply if we're dumping. */ | |
2086 | if (NILP (Vpurify_flag) | |
2087 | && egetenv ("EMACSLOADPATH")) | |
279499f0 | 2088 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
2089 | |
2090 | Vvalues = Qnil; | |
2091 | ||
078e7b4a | 2092 | load_in_progress = 0; |
d2c6be7f RS |
2093 | |
2094 | load_descriptor_list = Qnil; | |
078e7b4a JB |
2095 | } |
2096 | ||
2097 | void | |
279499f0 | 2098 | syms_of_lread () |
078e7b4a JB |
2099 | { |
2100 | defsubr (&Sread); | |
2101 | defsubr (&Sread_from_string); | |
2102 | defsubr (&Sintern); | |
2103 | defsubr (&Sintern_soft); | |
d007f5c8 | 2104 | defsubr (&Sunintern); |
078e7b4a | 2105 | defsubr (&Sload); |
228d4b1c | 2106 | defsubr (&Seval_buffer); |
078e7b4a JB |
2107 | defsubr (&Seval_region); |
2108 | defsubr (&Sread_char); | |
2109 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 2110 | defsubr (&Sread_event); |
078e7b4a JB |
2111 | defsubr (&Sget_file_char); |
2112 | defsubr (&Smapatoms); | |
2113 | ||
2114 | DEFVAR_LISP ("obarray", &Vobarray, | |
2115 | "Symbol table for use by `intern' and `read'.\n\ | |
2116 | It is a vector whose length ought to be prime for best results.\n\ | |
2117 | The vector's contents don't make sense if examined from Lisp programs;\n\ | |
2118 | to find all the symbols in an obarray, use `mapatoms'."); | |
2119 | ||
2120 | DEFVAR_LISP ("values", &Vvalues, | |
2121 | "List of values of all expressions which were read, evaluated and printed.\n\ | |
2122 | Order is reverse chronological."); | |
2123 | ||
2124 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
2125 | "Stream for read to get input from.\n\ | |
2126 | See documentation of `read' for possible values."); | |
2127 | Vstandard_input = Qt; | |
2128 | ||
2129 | DEFVAR_LISP ("load-path", &Vload_path, | |
2130 | "*List of directories to search for files to load.\n\ | |
2131 | Each element is a string (directory name) or nil (try default directory).\n\ | |
2132 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ | |
692f86ad | 2133 | otherwise to default specified by file `paths.h' when Emacs was built."); |
078e7b4a JB |
2134 | |
2135 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, | |
2136 | "Non-nil iff inside of `load'."); | |
2137 | ||
2138 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
2139 | "An alist of expressions to be evalled when particular files are loaded.\n\ | |
2140 | Each element looks like (FILENAME FORMS...).\n\ | |
2141 | When `load' is run and the file-name argument is FILENAME,\n\ | |
2142 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ | |
2143 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ | |
2144 | with no directory specified, since that is how `load' is normally called.\n\ | |
2145 | An error in FORMS does not undo the load,\n\ | |
2146 | but does prevent execution of the rest of the FORMS."); | |
2147 | Vafter_load_alist = Qnil; | |
2148 | ||
ae321d28 RS |
2149 | DEFVAR_LISP ("load-history", &Vload_history, |
2150 | "Alist mapping source file names to symbols and features.\n\ | |
2151 | Each alist element is a list that starts with a file name,\n\ | |
2152 | except for one element (optional) that starts with nil and describes\n\ | |
2153 | definitions evaluated from buffers not visiting files.\n\ | |
2154 | The remaining elements of each list are symbols defined as functions\n\ | |
2155 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); | |
2156 | Vload_history = Qnil; | |
2157 | ||
20ea2964 RS |
2158 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
2159 | "Full name of file being loaded by `load'."); | |
2160 | Vload_file_name = Qnil; | |
2161 | ||
8a1f1537 RS |
2162 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
2163 | "Used for internal purposes by `load'."); | |
ae321d28 RS |
2164 | Vcurrent_load_list = Qnil; |
2165 | ||
84a15045 RS |
2166 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
2167 | "Function used by `load' and `eval-region' for reading expressions.\n\ | |
2168 | The default is nil, which means use the function `read'."); | |
2169 | Vload_read_function = Qnil; | |
2170 | ||
d2c6be7f RS |
2171 | load_descriptor_list = Qnil; |
2172 | staticpro (&load_descriptor_list); | |
2173 | ||
8a1f1537 RS |
2174 | Qcurrent_load_list = intern ("current-load-list"); |
2175 | staticpro (&Qcurrent_load_list); | |
2176 | ||
078e7b4a JB |
2177 | Qstandard_input = intern ("standard-input"); |
2178 | staticpro (&Qstandard_input); | |
2179 | ||
2180 | Qread_char = intern ("read-char"); | |
2181 | staticpro (&Qread_char); | |
2182 | ||
2183 | Qget_file_char = intern ("get-file-char"); | |
2184 | staticpro (&Qget_file_char); | |
7bd279cd RS |
2185 | |
2186 | Qascii_character = intern ("ascii-character"); | |
2187 | staticpro (&Qascii_character); | |
c2225d00 RS |
2188 | |
2189 | Qload = intern ("load"); | |
2190 | staticpro (&Qload); | |
20ea2964 RS |
2191 | |
2192 | Qload_file_name = intern ("load-file-name"); | |
2193 | staticpro (&Qload_file_name); | |
078e7b4a | 2194 | } |