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; |
17634846 | 71 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot; |
7bd279cd RS |
72 | |
73 | extern Lisp_Object Qevent_symbol_element_mask; | |
078e7b4a JB |
74 | |
75 | /* non-zero if inside `load' */ | |
76 | int load_in_progress; | |
77 | ||
78 | /* Search path for files to be loaded. */ | |
79 | Lisp_Object Vload_path; | |
80 | ||
ae321d28 RS |
81 | /* This is the user-visible association list that maps features to |
82 | lists of defs in their load files. */ | |
83 | Lisp_Object Vload_history; | |
84 | ||
20ea2964 | 85 | /* This is used to build the load history. */ |
ae321d28 RS |
86 | Lisp_Object Vcurrent_load_list; |
87 | ||
20ea2964 RS |
88 | /* Name of file actually being read by `load'. */ |
89 | Lisp_Object Vload_file_name; | |
90 | ||
84a15045 RS |
91 | /* Function to use for reading, in `load' and friends. */ |
92 | Lisp_Object Vload_read_function; | |
93 | ||
d2c6be7f RS |
94 | /* List of descriptors now open for Fload. */ |
95 | static Lisp_Object load_descriptor_list; | |
96 | ||
078e7b4a JB |
97 | /* File for get_file_char to read from. Use by load */ |
98 | static FILE *instream; | |
99 | ||
100 | /* When nonzero, read conses in pure space */ | |
101 | static int read_pure; | |
102 | ||
103 | /* For use within read-from-string (this reader is non-reentrant!!) */ | |
104 | static int read_from_string_index; | |
105 | static int read_from_string_limit; | |
17634846 RS |
106 | |
107 | /* Nonzero means inside a new-style backquote | |
108 | with no surrounding parentheses. | |
109 | Fread initializes this to zero, so we need not specbind it | |
110 | or worry about what happens to it when there is an error. */ | |
111 | static int new_backquote_flag; | |
078e7b4a JB |
112 | \f |
113 | /* Handle unreading and rereading of characters. | |
114 | Write READCHAR to read a character, | |
115 | UNREAD(c) to unread c to be read again. */ | |
116 | ||
117 | #define READCHAR readchar (readcharfun) | |
118 | #define UNREAD(c) unreadchar (readcharfun, c) | |
119 | ||
120 | static int | |
121 | readchar (readcharfun) | |
122 | Lisp_Object readcharfun; | |
123 | { | |
124 | Lisp_Object tem; | |
125 | register struct buffer *inbuffer; | |
126 | register int c, mpos; | |
127 | ||
cfff016d | 128 | if (BUFFERP (readcharfun)) |
078e7b4a JB |
129 | { |
130 | inbuffer = XBUFFER (readcharfun); | |
131 | ||
132 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) | |
133 | return -1; | |
134 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); | |
135 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); | |
136 | ||
137 | return c; | |
138 | } | |
cfff016d | 139 | if (MARKERP (readcharfun)) |
078e7b4a JB |
140 | { |
141 | inbuffer = XMARKER (readcharfun)->buffer; | |
142 | ||
143 | mpos = marker_position (readcharfun); | |
144 | ||
145 | if (mpos > BUF_ZV (inbuffer) - 1) | |
146 | return -1; | |
147 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); | |
148 | if (mpos != BUF_GPT (inbuffer)) | |
149 | XMARKER (readcharfun)->bufpos++; | |
150 | else | |
151 | Fset_marker (readcharfun, make_number (mpos + 1), | |
152 | Fmarker_buffer (readcharfun)); | |
153 | return c; | |
154 | } | |
155 | if (EQ (readcharfun, Qget_file_char)) | |
2c1b5dbe KH |
156 | { |
157 | c = getc (instream); | |
158 | #ifdef EINTR | |
159 | /* Interrupted reads have been observed while reading over the network */ | |
160 | while (c == EOF && ferror (instream) && errno == EINTR) | |
161 | { | |
162 | clearerr (instream); | |
163 | c = getc (instream); | |
164 | } | |
165 | #endif | |
166 | return c; | |
167 | } | |
078e7b4a | 168 | |
cfff016d | 169 | if (STRINGP (readcharfun)) |
078e7b4a JB |
170 | { |
171 | register int c; | |
172 | /* This used to be return of a conditional expression, | |
173 | but that truncated -1 to a char on VMS. */ | |
174 | if (read_from_string_index < read_from_string_limit) | |
175 | c = XSTRING (readcharfun)->data[read_from_string_index++]; | |
176 | else | |
177 | c = -1; | |
178 | return c; | |
179 | } | |
180 | ||
181 | tem = call0 (readcharfun); | |
182 | ||
265a9e55 | 183 | if (NILP (tem)) |
078e7b4a JB |
184 | return -1; |
185 | return XINT (tem); | |
186 | } | |
187 | ||
188 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
189 | If the stream is a user function, call it with the char as argument. */ | |
190 | ||
191 | static void | |
192 | unreadchar (readcharfun, c) | |
193 | Lisp_Object readcharfun; | |
194 | int c; | |
195 | { | |
92fddec9 KH |
196 | if (c == -1) |
197 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
198 | since readchar didn't advance it when we read it. */ | |
199 | ; | |
cfff016d | 200 | else if (BUFFERP (readcharfun)) |
078e7b4a JB |
201 | { |
202 | if (XBUFFER (readcharfun) == current_buffer) | |
203 | SET_PT (point - 1); | |
204 | else | |
205 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
206 | } | |
cfff016d | 207 | else if (MARKERP (readcharfun)) |
078e7b4a | 208 | XMARKER (readcharfun)->bufpos--; |
cfff016d | 209 | else if (STRINGP (readcharfun)) |
078e7b4a JB |
210 | read_from_string_index--; |
211 | else if (EQ (readcharfun, Qget_file_char)) | |
212 | ungetc (c, instream); | |
213 | else | |
214 | call1 (readcharfun, make_number (c)); | |
215 | } | |
216 | ||
217 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
218 | \f | |
219 | /* get a character from the tty */ | |
220 | ||
3d9b22be JB |
221 | extern Lisp_Object read_char (); |
222 | ||
f42be754 JB |
223 | /* Read input events until we get one that's acceptable for our purposes. |
224 | ||
225 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
226 | until we get a character we like, and then stuffed into | |
227 | unread_switch_frame. | |
228 | ||
229 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
230 | if the unmodified version of the symbol has a Qascii_character | |
231 | property, and use that character, if present. | |
232 | ||
233 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
234 | get isn't an ASCII character with modifiers. If it's zero but | |
235 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
236 | character. */ | |
237 | Lisp_Object | |
238 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) | |
239 | int no_switch_frame, ascii_required, error_nonascii; | |
240 | { | |
241 | #ifdef standalone | |
242 | return make_number (getchar ()); | |
243 | #else | |
153a17b7 KH |
244 | register Lisp_Object val, delayed_switch_frame; |
245 | ||
246 | delayed_switch_frame = Qnil; | |
f42be754 JB |
247 | |
248 | /* Read until we get an acceptable event. */ | |
249 | retry: | |
250 | val = read_char (0, 0, 0, Qnil, 0); | |
251 | ||
cfff016d | 252 | if (BUFFERP (val)) |
6c82d689 KH |
253 | goto retry; |
254 | ||
f42be754 JB |
255 | /* switch-frame events are put off until after the next ASCII |
256 | character. This is better than signalling an error just because | |
257 | the last characters were typed to a separate minibuffer frame, | |
258 | for example. Eventually, some code which can deal with | |
259 | switch-frame events will read it and process it. */ | |
260 | if (no_switch_frame | |
261 | && EVENT_HAS_PARAMETERS (val) | |
262 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
263 | { | |
264 | delayed_switch_frame = val; | |
265 | goto retry; | |
266 | } | |
267 | ||
268 | if (ascii_required) | |
269 | { | |
270 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 271 | if (SYMBOLP (val)) |
f42be754 JB |
272 | { |
273 | Lisp_Object tem, tem1, tem2; | |
274 | tem = Fget (val, Qevent_symbol_element_mask); | |
275 | if (!NILP (tem)) | |
276 | { | |
277 | tem1 = Fget (Fcar (tem), Qascii_character); | |
278 | /* Merge this symbol's modifier bits | |
279 | with the ASCII equivalent of its basic code. */ | |
280 | if (!NILP (tem1)) | |
baf69866 | 281 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
282 | } |
283 | } | |
284 | ||
285 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 286 | if (!INTEGERP (val)) |
f42be754 JB |
287 | { |
288 | if (error_nonascii) | |
289 | { | |
1ec84625 | 290 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
291 | error ("Non-character input-event"); |
292 | } | |
293 | else | |
294 | goto retry; | |
295 | } | |
296 | } | |
297 | ||
298 | if (! NILP (delayed_switch_frame)) | |
299 | unread_switch_frame = delayed_switch_frame; | |
300 | ||
301 | return val; | |
302 | #endif | |
303 | } | |
304 | ||
078e7b4a JB |
305 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
306 | "Read a character from the command input (keyboard or macro).\n\ | |
e51e47f7 JB |
307 | It is returned as a number.\n\ |
308 | If the user generates an event which is not a character (i.e. a mouse\n\ | |
e37c0805 JB |
309 | click or function key event), `read-char' signals an error. As an\n\ |
310 | exception, switch-frame events are put off until non-ASCII events can\n\ | |
311 | be read.\n\ | |
312 | If you want to read non-character events, or ignore them, call\n\ | |
313 | `read-event' or `read-char-exclusive' instead.") | |
078e7b4a JB |
314 | () |
315 | { | |
f42be754 | 316 | return read_filtered_event (1, 1, 1); |
078e7b4a JB |
317 | } |
318 | ||
078e7b4a JB |
319 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
320 | "Read an event object from the input stream.") | |
321 | () | |
322 | { | |
f42be754 | 323 | return read_filtered_event (0, 0, 0); |
078e7b4a JB |
324 | } |
325 | ||
326 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, | |
327 | "Read a character from the command input (keyboard or macro).\n\ | |
328 | It is returned as a number. Non character events are ignored.") | |
329 | () | |
330 | { | |
f42be754 | 331 | return read_filtered_event (1, 1, 0); |
078e7b4a | 332 | } |
078e7b4a JB |
333 | |
334 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
335 | "Don't use this yourself.") | |
336 | () | |
337 | { | |
338 | register Lisp_Object val; | |
1805de4f | 339 | XSETINT (val, getc (instream)); |
078e7b4a JB |
340 | return val; |
341 | } | |
342 | \f | |
343 | static void readevalloop (); | |
344 | static Lisp_Object load_unwind (); | |
d2c6be7f | 345 | static Lisp_Object load_descriptor_unwind (); |
078e7b4a JB |
346 | |
347 | DEFUN ("load", Fload, Sload, 1, 4, 0, | |
348 | "Execute a file of Lisp code named FILE.\n\ | |
349 | First try FILE with `.elc' appended, then try with `.el',\n\ | |
350 | then try FILE unmodified.\n\ | |
351 | This function searches the directories in `load-path'.\n\ | |
352 | If optional second arg NOERROR is non-nil,\n\ | |
353 | report no error if FILE doesn't exist.\n\ | |
354 | Print messages at start and end of loading unless\n\ | |
355 | optional third arg NOMESSAGE is non-nil.\n\ | |
356 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ | |
357 | suffixes `.elc' or `.el' to the specified name FILE.\n\ | |
358 | Return t if file exists.") | |
359 | (str, noerror, nomessage, nosuffix) | |
360 | Lisp_Object str, noerror, nomessage, nosuffix; | |
361 | { | |
362 | register FILE *stream; | |
363 | register int fd = -1; | |
364 | register Lisp_Object lispstream; | |
078e7b4a JB |
365 | int count = specpdl_ptr - specpdl; |
366 | Lisp_Object temp; | |
367 | struct gcpro gcpro1; | |
368 | Lisp_Object found; | |
51ac6f83 RS |
369 | /* 1 means inhibit the message at the beginning. */ |
370 | int nomessage1 = 0; | |
c2225d00 | 371 | Lisp_Object handler; |
317073d5 | 372 | #ifdef DOS_NT |
23a71bd6 | 373 | char *dosmode = "rt"; |
317073d5 | 374 | #endif /* DOS_NT */ |
078e7b4a JB |
375 | |
376 | CHECK_STRING (str, 0); | |
078e7b4a | 377 | |
c2225d00 | 378 | /* If file name is magic, call the handler. */ |
a617e913 | 379 | handler = Ffind_file_name_handler (str, Qload); |
c2225d00 | 380 | if (!NILP (handler)) |
8a2c760a | 381 | return call5 (handler, Qload, str, noerror, nomessage, nosuffix); |
c2225d00 | 382 | |
07a0bda3 RS |
383 | /* Do this after the handler to avoid |
384 | the need to gcpro noerror, nomessage and nosuffix. | |
385 | (Below here, we care only whether they are nil or not.) */ | |
386 | str = Fsubstitute_in_file_name (str); | |
387 | ||
078e7b4a JB |
388 | /* Avoid weird lossage with null string as arg, |
389 | since it would try to load a directory as a Lisp file */ | |
390 | if (XSTRING (str)->size > 0) | |
391 | { | |
5a6e5452 | 392 | GCPRO1 (str); |
265a9e55 | 393 | fd = openp (Vload_path, str, !NILP (nosuffix) ? "" : ".elc:.el:", |
078e7b4a | 394 | &found, 0); |
5a6e5452 | 395 | UNGCPRO; |
078e7b4a JB |
396 | } |
397 | ||
398 | if (fd < 0) | |
399 | { | |
265a9e55 | 400 | if (NILP (noerror)) |
078e7b4a JB |
401 | while (1) |
402 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
403 | Fcons (str, Qnil))); | |
404 | else | |
405 | return Qnil; | |
406 | } | |
407 | ||
408 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), | |
409 | ".elc", 4)) | |
410 | { | |
411 | struct stat s1, s2; | |
412 | int result; | |
413 | ||
317073d5 | 414 | #ifdef DOS_NT |
23a71bd6 | 415 | dosmode = "rb"; |
317073d5 | 416 | #endif /* DOS_NT */ |
4ff37b08 | 417 | stat ((char *)XSTRING (found)->data, &s1); |
078e7b4a | 418 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
4ff37b08 | 419 | result = stat ((char *)XSTRING (found)->data, &s2); |
078e7b4a | 420 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
51ac6f83 RS |
421 | { |
422 | message ("Source file `%s' newer than byte-compiled file", | |
423 | XSTRING (found)->data); | |
424 | /* Don't immediately overwrite this message. */ | |
425 | if (!noninteractive) | |
426 | nomessage1 = 1; | |
427 | } | |
078e7b4a JB |
428 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
429 | } | |
430 | ||
317073d5 | 431 | #ifdef DOS_NT |
23a71bd6 RS |
432 | close (fd); |
433 | stream = fopen ((char *) XSTRING (found)->data, dosmode); | |
317073d5 | 434 | #else /* not DOS_NT */ |
078e7b4a | 435 | stream = fdopen (fd, "r"); |
317073d5 | 436 | #endif /* not DOS_NT */ |
078e7b4a JB |
437 | if (stream == 0) |
438 | { | |
439 | close (fd); | |
440 | error ("Failure to create stdio stream for %s", XSTRING (str)->data); | |
441 | } | |
442 | ||
51ac6f83 | 443 | if (NILP (nomessage) && !nomessage1) |
078e7b4a JB |
444 | message ("Loading %s...", XSTRING (str)->data); |
445 | ||
446 | GCPRO1 (str); | |
838abf56 KH |
447 | lispstream = Fcons (Qnil, Qnil); |
448 | XSETFASTINT (XCONS (lispstream)->car, (EMACS_UINT)stream >> 16); | |
449 | XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 450 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f | 451 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 452 | specbind (Qload_file_name, found); |
d2c6be7f RS |
453 | load_descriptor_list |
454 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 455 | load_in_progress++; |
ae321d28 | 456 | readevalloop (Qget_file_char, stream, str, Feval, 0); |
078e7b4a JB |
457 | unbind_to (count, Qnil); |
458 | ||
459 | /* Run any load-hooks for this file. */ | |
460 | temp = Fassoc (str, Vafter_load_alist); | |
265a9e55 | 461 | if (!NILP (temp)) |
078e7b4a JB |
462 | Fprogn (Fcdr (temp)); |
463 | UNGCPRO; | |
464 | ||
265a9e55 | 465 | if (!noninteractive && NILP (nomessage)) |
078e7b4a JB |
466 | message ("Loading %s...done", XSTRING (str)->data); |
467 | return Qt; | |
468 | } | |
469 | ||
470 | static Lisp_Object | |
471 | load_unwind (stream) /* used as unwind-protect function in load */ | |
472 | Lisp_Object stream; | |
473 | { | |
c8bdaa8c RS |
474 | fclose ((FILE *) (XFASTINT (XCONS (stream)->car) << 16 |
475 | | XFASTINT (XCONS (stream)->cdr))); | |
078e7b4a JB |
476 | if (--load_in_progress < 0) load_in_progress = 0; |
477 | return Qnil; | |
478 | } | |
479 | ||
d2c6be7f RS |
480 | static Lisp_Object |
481 | load_descriptor_unwind (oldlist) | |
482 | Lisp_Object oldlist; | |
483 | { | |
484 | load_descriptor_list = oldlist; | |
838abf56 | 485 | return Qnil; |
d2c6be7f RS |
486 | } |
487 | ||
488 | /* Close all descriptors in use for Floads. | |
489 | This is used when starting a subprocess. */ | |
490 | ||
491 | void | |
492 | close_load_descs () | |
493 | { | |
494 | Lisp_Object tail; | |
495 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) | |
496 | close (XFASTINT (XCONS (tail)->car)); | |
497 | } | |
078e7b4a JB |
498 | \f |
499 | static int | |
500 | complete_filename_p (pathname) | |
501 | Lisp_Object pathname; | |
502 | { | |
503 | register unsigned char *s = XSTRING (pathname)->data; | |
317073d5 RS |
504 | return (IS_DIRECTORY_SEP (s[0]) |
505 | || (XSTRING (pathname)->size > 2 | |
506 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) | |
078e7b4a JB |
507 | #ifdef ALTOS |
508 | || *s == '@' | |
509 | #endif | |
510 | #ifdef VMS | |
511 | || index (s, ':') | |
512 | #endif /* VMS */ | |
513 | ); | |
514 | } | |
515 | ||
516 | /* Search for a file whose name is STR, looking in directories | |
517 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
518 | SUFFIX is a string containing possible suffixes separated by colons. | |
519 | On success, returns a file descriptor. On failure, returns -1. | |
520 | ||
521 | EXEC_ONLY nonzero means don't open the files, | |
522 | just look for one that is executable. In this case, | |
523 | returns 1 on success. | |
524 | ||
525 | If STOREPTR is nonzero, it points to a slot where the name of | |
526 | the file actually found should be stored as a Lisp string. | |
527 | Nil is stored there on failure. */ | |
528 | ||
529 | int | |
530 | openp (path, str, suffix, storeptr, exec_only) | |
531 | Lisp_Object path, str; | |
532 | char *suffix; | |
533 | Lisp_Object *storeptr; | |
534 | int exec_only; | |
535 | { | |
536 | register int fd; | |
537 | int fn_size = 100; | |
538 | char buf[100]; | |
539 | register char *fn = buf; | |
540 | int absolute = 0; | |
541 | int want_size; | |
542 | register Lisp_Object filename; | |
543 | struct stat st; | |
5a6e5452 | 544 | struct gcpro gcpro1; |
078e7b4a | 545 | |
5a6e5452 | 546 | GCPRO1 (str); |
078e7b4a JB |
547 | if (storeptr) |
548 | *storeptr = Qnil; | |
549 | ||
550 | if (complete_filename_p (str)) | |
551 | absolute = 1; | |
552 | ||
265a9e55 | 553 | for (; !NILP (path); path = Fcdr (path)) |
078e7b4a JB |
554 | { |
555 | char *nsuffix; | |
556 | ||
557 | filename = Fexpand_file_name (str, Fcar (path)); | |
558 | if (!complete_filename_p (filename)) | |
559 | /* If there are non-absolute elts in PATH (eg ".") */ | |
560 | /* Of course, this could conceivably lose if luser sets | |
561 | default-directory to be something non-absolute... */ | |
562 | { | |
563 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
564 | if (!complete_filename_p (filename)) | |
565 | /* Give up on this path element! */ | |
566 | continue; | |
567 | } | |
568 | ||
569 | /* Calculate maximum size of any filename made from | |
570 | this path element/specified file name and any possible suffix. */ | |
571 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; | |
572 | if (fn_size < want_size) | |
573 | fn = (char *) alloca (fn_size = 100 + want_size); | |
574 | ||
575 | nsuffix = suffix; | |
576 | ||
577 | /* Loop over suffixes. */ | |
578 | while (1) | |
579 | { | |
580 | char *esuffix = (char *) index (nsuffix, ':'); | |
581 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); | |
582 | ||
583 | /* Concatenate path element/specified name with the suffix. */ | |
584 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); | |
585 | fn[XSTRING (filename)->size] = 0; | |
586 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ | |
587 | strncat (fn, nsuffix, lsuffix); | |
588 | ||
589 | /* Ignore file if it's a directory. */ | |
590 | if (stat (fn, &st) >= 0 | |
591 | && (st.st_mode & S_IFMT) != S_IFDIR) | |
592 | { | |
593 | /* Check that we can access or open it. */ | |
594 | if (exec_only) | |
595 | fd = (access (fn, X_OK) == 0) ? 1 : -1; | |
596 | else | |
f7d279f0 | 597 | fd = open (fn, O_RDONLY, 0); |
078e7b4a JB |
598 | |
599 | if (fd >= 0) | |
600 | { | |
601 | /* We succeeded; return this descriptor and filename. */ | |
602 | if (storeptr) | |
603 | *storeptr = build_string (fn); | |
5ef2a3c0 KH |
604 | UNGCPRO; |
605 | return fd; | |
078e7b4a JB |
606 | } |
607 | } | |
608 | ||
609 | /* Advance to next suffix. */ | |
610 | if (esuffix == 0) | |
611 | break; | |
612 | nsuffix += lsuffix + 1; | |
613 | } | |
5a6e5452 | 614 | if (absolute) |
5ef2a3c0 | 615 | break; |
078e7b4a JB |
616 | } |
617 | ||
5ef2a3c0 KH |
618 | UNGCPRO; |
619 | return -1; | |
078e7b4a JB |
620 | } |
621 | ||
622 | \f | |
ae321d28 RS |
623 | /* Merge the list we've accumulated of globals from the current input source |
624 | into the load_history variable. The details depend on whether | |
625 | the source has an associated file name or not. */ | |
626 | ||
627 | static void | |
628 | build_load_history (stream, source) | |
629 | FILE *stream; | |
630 | Lisp_Object source; | |
631 | { | |
632 | register Lisp_Object tail, prev, newelt; | |
633 | register Lisp_Object tem, tem2; | |
634 | register int foundit, loading; | |
635 | ||
8a1f1537 RS |
636 | /* Don't bother recording anything for preloaded files. */ |
637 | if (!NILP (Vpurify_flag)) | |
638 | return; | |
639 | ||
ae321d28 RS |
640 | loading = stream || !NARROWED; |
641 | ||
642 | tail = Vload_history; | |
643 | prev = Qnil; | |
644 | foundit = 0; | |
645 | while (!NILP (tail)) | |
646 | { | |
647 | tem = Fcar (tail); | |
648 | ||
649 | /* Find the feature's previous assoc list... */ | |
650 | if (!NILP (Fequal (source, Fcar (tem)))) | |
651 | { | |
652 | foundit = 1; | |
653 | ||
654 | /* If we're loading, remove it. */ | |
655 | if (loading) | |
656 | { | |
657 | if (NILP (prev)) | |
658 | Vload_history = Fcdr (tail); | |
659 | else | |
660 | Fsetcdr (prev, Fcdr (tail)); | |
661 | } | |
662 | ||
663 | /* Otherwise, cons on new symbols that are not already members. */ | |
664 | else | |
665 | { | |
666 | tem2 = Vcurrent_load_list; | |
667 | ||
668 | while (CONSP (tem2)) | |
669 | { | |
670 | newelt = Fcar (tem2); | |
671 | ||
672 | if (NILP (Fmemq (newelt, tem))) | |
673 | Fsetcar (tail, Fcons (Fcar (tem), | |
674 | Fcons (newelt, Fcdr (tem)))); | |
675 | ||
676 | tem2 = Fcdr (tem2); | |
677 | QUIT; | |
678 | } | |
679 | } | |
680 | } | |
681 | else | |
682 | prev = tail; | |
683 | tail = Fcdr (tail); | |
684 | QUIT; | |
685 | } | |
686 | ||
8a1f1537 RS |
687 | /* If we're loading, cons the new assoc onto the front of load-history, |
688 | the most-recently-loaded position. Also do this if we didn't find | |
689 | an existing member for the current source. */ | |
690 | if (loading || !foundit) | |
691 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
692 | Vload_history); | |
ae321d28 RS |
693 | } |
694 | ||
078e7b4a JB |
695 | Lisp_Object |
696 | unreadpure () /* Used as unwind-protect function in readevalloop */ | |
697 | { | |
698 | read_pure = 0; | |
699 | return Qnil; | |
700 | } | |
701 | ||
702 | static void | |
ae321d28 | 703 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
078e7b4a | 704 | Lisp_Object readcharfun; |
ae321d28 RS |
705 | FILE *stream; |
706 | Lisp_Object sourcename; | |
078e7b4a JB |
707 | Lisp_Object (*evalfun) (); |
708 | int printflag; | |
709 | { | |
710 | register int c; | |
711 | register Lisp_Object val; | |
712 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 713 | struct gcpro gcpro1; |
49cf7ff4 RS |
714 | struct buffer *b = 0; |
715 | ||
716 | if (BUFFERP (readcharfun)) | |
717 | b = XBUFFER (readcharfun); | |
718 | else if (MARKERP (readcharfun)) | |
719 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
720 | |
721 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 722 | specbind (Qcurrent_load_list, Qnil); |
078e7b4a | 723 | |
8a1f1537 | 724 | GCPRO1 (sourcename); |
ae321d28 | 725 | |
ae321d28 RS |
726 | LOADHIST_ATTACH (sourcename); |
727 | ||
078e7b4a JB |
728 | while (1) |
729 | { | |
49cf7ff4 RS |
730 | if (b != 0 && NILP (b->name)) |
731 | error ("Reading from killed buffer"); | |
732 | ||
078e7b4a JB |
733 | instream = stream; |
734 | c = READCHAR; | |
735 | if (c == ';') | |
736 | { | |
737 | while ((c = READCHAR) != '\n' && c != -1); | |
738 | continue; | |
739 | } | |
740 | if (c < 0) break; | |
6069d957 RS |
741 | |
742 | /* Ignore whitespace here, so we can detect eof. */ | |
743 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
744 | continue; | |
078e7b4a | 745 | |
265a9e55 | 746 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 747 | { |
0e326373 | 748 | int count1 = specpdl_ptr - specpdl; |
078e7b4a JB |
749 | record_unwind_protect (unreadpure, Qnil); |
750 | val = read_list (-1, readcharfun); | |
0e326373 | 751 | unbind_to (count1, Qnil); |
078e7b4a JB |
752 | } |
753 | else | |
754 | { | |
755 | UNREAD (c); | |
84a15045 RS |
756 | if (NILP (Vload_read_function)) |
757 | val = read0 (readcharfun); | |
758 | else | |
759 | val = call1 (Vload_read_function, readcharfun); | |
078e7b4a JB |
760 | } |
761 | ||
762 | val = (*evalfun) (val); | |
763 | if (printflag) | |
764 | { | |
765 | Vvalues = Fcons (val, Vvalues); | |
766 | if (EQ (Vstandard_output, Qt)) | |
767 | Fprin1 (val, Qnil); | |
768 | else | |
769 | Fprint (val, Qnil); | |
770 | } | |
771 | } | |
772 | ||
ae321d28 | 773 | build_load_history (stream, sourcename); |
ae321d28 RS |
774 | UNGCPRO; |
775 | ||
078e7b4a JB |
776 | unbind_to (count, Qnil); |
777 | } | |
778 | ||
779 | #ifndef standalone | |
780 | ||
e5d77022 | 781 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
94b304d7 RS |
782 | "Execute the current buffer as Lisp code.\n\ |
783 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ | |
784 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ | |
785 | PRINTFLAG controls printing of output:\n\ | |
228d4b1c JA |
786 | nil means discard it; anything else is stream for print.\n\ |
787 | \n\ | |
788 | If there is no error, point does not move. If there is an error,\n\ | |
789 | point remains at the end of the last character read from the buffer.") | |
790 | (bufname, printflag) | |
791 | Lisp_Object bufname, printflag; | |
792 | { | |
793 | int count = specpdl_ptr - specpdl; | |
794 | Lisp_Object tem, buf; | |
795 | ||
dfdb645c | 796 | if (NILP (bufname)) |
228d4b1c JA |
797 | buf = Fcurrent_buffer (); |
798 | else | |
799 | buf = Fget_buffer (bufname); | |
dfdb645c | 800 | if (NILP (buf)) |
228d4b1c JA |
801 | error ("No such buffer."); |
802 | ||
dfdb645c | 803 | if (NILP (printflag)) |
228d4b1c JA |
804 | tem = Qsymbolp; |
805 | else | |
806 | tem = printflag; | |
807 | specbind (Qstandard_output, tem); | |
808 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
809 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
ae321d28 | 810 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
cb09ab7a | 811 | unbind_to (count, Qnil); |
228d4b1c JA |
812 | |
813 | return Qnil; | |
814 | } | |
815 | ||
816 | #if 0 | |
078e7b4a JB |
817 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
818 | "Execute the current buffer as Lisp code.\n\ | |
819 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ | |
820 | nil means discard it; anything else is stream for print.\n\ | |
821 | \n\ | |
822 | If there is no error, point does not move. If there is an error,\n\ | |
823 | point remains at the end of the last character read from the buffer.") | |
824 | (printflag) | |
825 | Lisp_Object printflag; | |
826 | { | |
827 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
828 | Lisp_Object tem, cbuf; |
829 | ||
830 | cbuf = Fcurrent_buffer () | |
078e7b4a | 831 | |
265a9e55 | 832 | if (NILP (printflag)) |
078e7b4a JB |
833 | tem = Qsymbolp; |
834 | else | |
835 | tem = printflag; | |
836 | specbind (Qstandard_output, tem); | |
837 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
838 | SET_PT (BEGV); | |
ae321d28 | 839 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
840 | return unbind_to (count, Qnil); |
841 | } | |
228d4b1c | 842 | #endif |
078e7b4a JB |
843 | |
844 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", | |
845 | "Execute the region as Lisp code.\n\ | |
846 | When called from programs, expects two arguments,\n\ | |
847 | giving starting and ending indices in the current buffer\n\ | |
848 | of the text to be executed.\n\ | |
849 | Programs can pass third argument PRINTFLAG which controls output:\n\ | |
850 | nil means discard it; anything else is stream for printing it.\n\ | |
851 | \n\ | |
852 | If there is no error, point does not move. If there is an error,\n\ | |
853 | point remains at the end of the last character read from the buffer.") | |
854 | (b, e, printflag) | |
855 | Lisp_Object b, e, printflag; | |
856 | { | |
857 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
858 | Lisp_Object tem, cbuf; |
859 | ||
860 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 861 | |
265a9e55 | 862 | if (NILP (printflag)) |
078e7b4a JB |
863 | tem = Qsymbolp; |
864 | else | |
865 | tem = printflag; | |
866 | specbind (Qstandard_output, tem); | |
867 | ||
265a9e55 | 868 | if (NILP (printflag)) |
078e7b4a JB |
869 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
870 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
871 | ||
872 | /* This both uses b and checks its type. */ | |
873 | Fgoto_char (b); | |
874 | Fnarrow_to_region (make_number (BEGV), e); | |
ae321d28 | 875 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
876 | |
877 | return unbind_to (count, Qnil); | |
878 | } | |
879 | ||
880 | #endif /* standalone */ | |
881 | \f | |
882 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
883 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ | |
884 | If STREAM is nil, use the value of `standard-input' (which see).\n\ | |
885 | STREAM or the value of `standard-input' may be:\n\ | |
886 | a buffer (read from point and advance it)\n\ | |
887 | a marker (read from where it points and advance it)\n\ | |
888 | a function (call it with no arguments for each character,\n\ | |
889 | call it with a char as argument to push a char back)\n\ | |
890 | a string (takes text from string, starting at the beginning)\n\ | |
891 | t (read text line using minibuffer and use it).") | |
5be02dff KH |
892 | (stream) |
893 | Lisp_Object stream; | |
078e7b4a JB |
894 | { |
895 | extern Lisp_Object Fread_minibuffer (); | |
896 | ||
5be02dff KH |
897 | if (NILP (stream)) |
898 | stream = Vstandard_input; | |
899 | if (EQ (stream, Qt)) | |
900 | stream = Qread_char; | |
078e7b4a | 901 | |
17634846 RS |
902 | new_backquote_flag = 0; |
903 | ||
078e7b4a | 904 | #ifndef standalone |
5be02dff | 905 | if (EQ (stream, Qread_char)) |
078e7b4a JB |
906 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
907 | #endif | |
908 | ||
5be02dff KH |
909 | if (STRINGP (stream)) |
910 | return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
078e7b4a | 911 | |
5be02dff | 912 | return read0 (stream); |
078e7b4a JB |
913 | } |
914 | ||
915 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
916 | "Read one Lisp expression which is represented as text by STRING.\n\ | |
917 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ | |
918 | START and END optionally delimit a substring of STRING from which to read;\n\ | |
919 | they default to 0 and (length STRING) respectively.") | |
920 | (string, start, end) | |
921 | Lisp_Object string, start, end; | |
922 | { | |
923 | int startval, endval; | |
924 | Lisp_Object tem; | |
925 | ||
926 | CHECK_STRING (string,0); | |
927 | ||
265a9e55 | 928 | if (NILP (end)) |
078e7b4a JB |
929 | endval = XSTRING (string)->size; |
930 | else | |
931 | { CHECK_NUMBER (end,2); | |
932 | endval = XINT (end); | |
933 | if (endval < 0 || endval > XSTRING (string)->size) | |
934 | args_out_of_range (string, end); | |
935 | } | |
936 | ||
265a9e55 | 937 | if (NILP (start)) |
078e7b4a JB |
938 | startval = 0; |
939 | else | |
940 | { CHECK_NUMBER (start,1); | |
941 | startval = XINT (start); | |
942 | if (startval < 0 || startval > endval) | |
943 | args_out_of_range (string, start); | |
944 | } | |
945 | ||
946 | read_from_string_index = startval; | |
947 | read_from_string_limit = endval; | |
948 | ||
17634846 RS |
949 | new_backquote_flag = 0; |
950 | ||
078e7b4a JB |
951 | tem = read0 (string); |
952 | return Fcons (tem, make_number (read_from_string_index)); | |
953 | } | |
954 | \f | |
6428369f KH |
955 | /* Use this for recursive reads, in contexts where internal tokens |
956 | are not allowed. */ | |
078e7b4a JB |
957 | static Lisp_Object |
958 | read0 (readcharfun) | |
959 | Lisp_Object readcharfun; | |
960 | { | |
961 | register Lisp_Object val; | |
962 | char c; | |
963 | ||
17634846 | 964 | val = read1 (readcharfun, &c, 0); |
6428369f KH |
965 | if (c) |
966 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); | |
078e7b4a JB |
967 | |
968 | return val; | |
969 | } | |
970 | \f | |
971 | static int read_buffer_size; | |
972 | static char *read_buffer; | |
973 | ||
974 | static int | |
975 | read_escape (readcharfun) | |
976 | Lisp_Object readcharfun; | |
977 | { | |
978 | register int c = READCHAR; | |
979 | switch (c) | |
980 | { | |
981 | case 'a': | |
265a9e55 | 982 | return '\007'; |
078e7b4a JB |
983 | case 'b': |
984 | return '\b'; | |
f405a585 RS |
985 | case 'd': |
986 | return 0177; | |
078e7b4a JB |
987 | case 'e': |
988 | return 033; | |
989 | case 'f': | |
990 | return '\f'; | |
991 | case 'n': | |
992 | return '\n'; | |
993 | case 'r': | |
994 | return '\r'; | |
995 | case 't': | |
996 | return '\t'; | |
997 | case 'v': | |
998 | return '\v'; | |
999 | case '\n': | |
1000 | return -1; | |
1001 | ||
1002 | case 'M': | |
1003 | c = READCHAR; | |
1004 | if (c != '-') | |
1005 | error ("Invalid escape character syntax"); | |
1006 | c = READCHAR; | |
1007 | if (c == '\\') | |
1008 | c = read_escape (readcharfun); | |
7bd279cd | 1009 | return c | meta_modifier; |
f405a585 RS |
1010 | |
1011 | case 'S': | |
1012 | c = READCHAR; | |
1013 | if (c != '-') | |
1014 | error ("Invalid escape character syntax"); | |
1015 | c = READCHAR; | |
1016 | if (c == '\\') | |
1017 | c = read_escape (readcharfun); | |
7bd279cd RS |
1018 | return c | shift_modifier; |
1019 | ||
1020 | case 'H': | |
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 | hyper_modifier; | |
1028 | ||
1029 | case 'A': | |
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 | alt_modifier; | |
1037 | ||
1038 | case 's': | |
1039 | c = READCHAR; | |
1040 | if (c != '-') | |
1041 | error ("Invalid escape character syntax"); | |
1042 | c = READCHAR; | |
1043 | if (c == '\\') | |
1044 | c = read_escape (readcharfun); | |
1045 | return c | super_modifier; | |
078e7b4a JB |
1046 | |
1047 | case 'C': | |
1048 | c = READCHAR; | |
1049 | if (c != '-') | |
1050 | error ("Invalid escape character syntax"); | |
1051 | case '^': | |
1052 | c = READCHAR; | |
1053 | if (c == '\\') | |
1054 | c = read_escape (readcharfun); | |
f405a585 RS |
1055 | if ((c & 0177) == '?') |
1056 | return 0177 | c; | |
1057 | /* ASCII control chars are made from letters (both cases), | |
1058 | as well as the non-letters within 0100...0137. */ | |
1059 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1060 | return (c & (037 | ~0177)); | |
1061 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1062 | return (c & (037 | ~0177)); | |
078e7b4a | 1063 | else |
7bd279cd | 1064 | return c | ctrl_modifier; |
078e7b4a JB |
1065 | |
1066 | case '0': | |
1067 | case '1': | |
1068 | case '2': | |
1069 | case '3': | |
1070 | case '4': | |
1071 | case '5': | |
1072 | case '6': | |
1073 | case '7': | |
1074 | /* An octal escape, as in ANSI C. */ | |
1075 | { | |
1076 | register int i = c - '0'; | |
1077 | register int count = 0; | |
1078 | while (++count < 3) | |
1079 | { | |
1080 | if ((c = READCHAR) >= '0' && c <= '7') | |
1081 | { | |
1082 | i *= 8; | |
1083 | i += c - '0'; | |
1084 | } | |
1085 | else | |
1086 | { | |
1087 | UNREAD (c); | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | return i; | |
1092 | } | |
1093 | ||
1094 | case 'x': | |
1095 | /* A hex escape, as in ANSI C. */ | |
1096 | { | |
1097 | int i = 0; | |
1098 | while (1) | |
1099 | { | |
1100 | c = READCHAR; | |
1101 | if (c >= '0' && c <= '9') | |
1102 | { | |
1103 | i *= 16; | |
1104 | i += c - '0'; | |
1105 | } | |
1106 | else if ((c >= 'a' && c <= 'f') | |
1107 | || (c >= 'A' && c <= 'F')) | |
1108 | { | |
1109 | i *= 16; | |
1110 | if (c >= 'a' && c <= 'f') | |
1111 | i += c - 'a' + 10; | |
1112 | else | |
1113 | i += c - 'A' + 10; | |
1114 | } | |
1115 | else | |
1116 | { | |
1117 | UNREAD (c); | |
1118 | break; | |
1119 | } | |
1120 | } | |
1121 | return i; | |
1122 | } | |
1123 | ||
1124 | default: | |
1125 | return c; | |
1126 | } | |
1127 | } | |
1128 | ||
6428369f KH |
1129 | /* If the next token is ')' or ']' or '.', we store that character |
1130 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
1131 | zero in *PCH and we read and return one lisp object. |
1132 | ||
1133 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
1134 | ||
078e7b4a | 1135 | static Lisp_Object |
17634846 | 1136 | read1 (readcharfun, pch, first_in_list) |
078e7b4a | 1137 | register Lisp_Object readcharfun; |
6428369f | 1138 | char *pch; |
17634846 | 1139 | int first_in_list; |
078e7b4a JB |
1140 | { |
1141 | register int c; | |
6428369f | 1142 | *pch = 0; |
078e7b4a JB |
1143 | |
1144 | retry: | |
1145 | ||
1146 | c = READCHAR; | |
1147 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1148 | ||
1149 | switch (c) | |
1150 | { | |
1151 | case '(': | |
1152 | return read_list (0, readcharfun); | |
1153 | ||
1154 | case '[': | |
1155 | return read_vector (readcharfun); | |
1156 | ||
1157 | case ')': | |
1158 | case ']': | |
078e7b4a | 1159 | { |
6428369f KH |
1160 | *pch = c; |
1161 | return Qnil; | |
078e7b4a JB |
1162 | } |
1163 | ||
1164 | case '#': | |
200f684e RS |
1165 | c = READCHAR; |
1166 | if (c == '[') | |
1167 | { | |
1168 | /* Accept compiled functions at read-time so that we don't have to | |
1169 | build them using function calls. */ | |
748ef62f RS |
1170 | Lisp_Object tmp; |
1171 | tmp = read_vector (readcharfun); | |
1172 | return Fmake_byte_code (XVECTOR (tmp)->size, | |
1173 | XVECTOR (tmp)->contents); | |
200f684e | 1174 | } |
748ef62f RS |
1175 | #ifdef USE_TEXT_PROPERTIES |
1176 | if (c == '(') | |
1177 | { | |
1178 | Lisp_Object tmp; | |
1179 | struct gcpro gcpro1; | |
6428369f | 1180 | char ch; |
748ef62f RS |
1181 | |
1182 | /* Read the string itself. */ | |
17634846 | 1183 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 1184 | if (ch != 0 || !STRINGP (tmp)) |
748ef62f RS |
1185 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
1186 | GCPRO1 (tmp); | |
1187 | /* Read the intervals and their properties. */ | |
1188 | while (1) | |
1189 | { | |
1190 | Lisp_Object beg, end, plist; | |
1191 | ||
17634846 | 1192 | beg = read1 (readcharfun, &ch, 0); |
6428369f KH |
1193 | if (ch == ')') |
1194 | break; | |
1195 | if (ch == 0) | |
17634846 | 1196 | end = read1 (readcharfun, &ch, 0); |
6428369f | 1197 | if (ch == 0) |
17634846 | 1198 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 1199 | if (ch) |
748ef62f | 1200 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
1201 | Fcons (build_string ("invalid string property list"), |
1202 | Qnil)); | |
748ef62f RS |
1203 | Fset_text_properties (beg, end, plist, tmp); |
1204 | } | |
1205 | UNGCPRO; | |
1206 | return tmp; | |
1207 | } | |
1208 | #endif | |
20ea2964 RS |
1209 | /* #@NUMBER is used to skip NUMBER following characters. |
1210 | That's used in .elc files to skip over doc strings | |
1211 | and function definitions. */ | |
1212 | if (c == '@') | |
1213 | { | |
1214 | int i, nskip = 0; | |
1215 | ||
1216 | /* Read a decimal integer. */ | |
1217 | while ((c = READCHAR) >= 0 | |
1218 | && c >= '0' && c <= '9') | |
1219 | { | |
1220 | nskip *= 10; | |
1221 | nskip += c - '0'; | |
1222 | } | |
1223 | if (c >= 0) | |
1224 | UNREAD (c); | |
1225 | ||
1226 | /* Skip that many characters. */ | |
1227 | for (i = 0; i < nskip && c >= 0; i++) | |
1228 | c = READCHAR; | |
1229 | goto retry; | |
1230 | } | |
1231 | if (c == '$') | |
1232 | return Vload_file_name; | |
1233 | ||
200f684e | 1234 | UNREAD (c); |
748ef62f | 1235 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
1236 | |
1237 | case ';': | |
1238 | while ((c = READCHAR) >= 0 && c != '\n'); | |
1239 | goto retry; | |
1240 | ||
1241 | case '\'': | |
1242 | { | |
1243 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
1244 | } | |
1245 | ||
17634846 RS |
1246 | case '`': |
1247 | if (first_in_list) | |
1248 | goto default_label; | |
1249 | else | |
1250 | { | |
1251 | Lisp_Object value; | |
1252 | ||
1253 | new_backquote_flag = 1; | |
1254 | value = read0 (readcharfun); | |
1255 | new_backquote_flag = 0; | |
1256 | ||
1257 | return Fcons (Qbackquote, Fcons (value, Qnil)); | |
1258 | } | |
1259 | ||
1260 | case ',': | |
1261 | if (new_backquote_flag) | |
1262 | { | |
1263 | Lisp_Object comma_type = Qnil; | |
1264 | Lisp_Object value; | |
1265 | int ch = READCHAR; | |
1266 | ||
1267 | if (ch == '@') | |
1268 | comma_type = Qcomma_at; | |
1269 | else if (ch == '.') | |
1270 | comma_type = Qcomma_dot; | |
1271 | else | |
1272 | { | |
1273 | if (ch >= 0) UNREAD (ch); | |
1274 | comma_type = Qcomma; | |
1275 | } | |
1276 | ||
1277 | new_backquote_flag = 0; | |
1278 | value = read0 (readcharfun); | |
1279 | new_backquote_flag = 1; | |
1280 | return Fcons (comma_type, Fcons (value, Qnil)); | |
1281 | } | |
1282 | else | |
1283 | goto default_label; | |
1284 | ||
078e7b4a JB |
1285 | case '?': |
1286 | { | |
1287 | register Lisp_Object val; | |
1288 | ||
1289 | c = READCHAR; | |
1290 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1291 | ||
1292 | if (c == '\\') | |
1805de4f | 1293 | XSETINT (val, read_escape (readcharfun)); |
078e7b4a | 1294 | else |
1805de4f | 1295 | XSETINT (val, c); |
078e7b4a JB |
1296 | |
1297 | return val; | |
1298 | } | |
1299 | ||
1300 | case '\"': | |
1301 | { | |
1302 | register char *p = read_buffer; | |
1303 | register char *end = read_buffer + read_buffer_size; | |
1304 | register int c; | |
1305 | int cancel = 0; | |
1306 | ||
1307 | while ((c = READCHAR) >= 0 | |
1308 | && c != '\"') | |
1309 | { | |
1310 | if (p == end) | |
1311 | { | |
1312 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1313 | p += new - read_buffer; | |
1314 | read_buffer += new - read_buffer; | |
1315 | end = read_buffer + read_buffer_size; | |
1316 | } | |
1317 | if (c == '\\') | |
1318 | c = read_escape (readcharfun); | |
1319 | /* c is -1 if \ newline has just been seen */ | |
f405a585 | 1320 | if (c == -1) |
078e7b4a JB |
1321 | { |
1322 | if (p == read_buffer) | |
1323 | cancel = 1; | |
1324 | } | |
1325 | else | |
f943104a | 1326 | { |
988c2f83 RS |
1327 | /* Allow `\C- ' and `\C-?'. */ |
1328 | if (c == (CHAR_CTL | ' ')) | |
1329 | c = 0; | |
1330 | else if (c == (CHAR_CTL | '?')) | |
1331 | c = 127; | |
1332 | ||
f943104a KH |
1333 | if (c & CHAR_META) |
1334 | /* Move the meta bit to the right place for a string. */ | |
1335 | c = (c & ~CHAR_META) | 0x80; | |
1336 | if (c & ~0xff) | |
1337 | error ("Invalid modifier in string"); | |
1338 | *p++ = c; | |
1339 | } | |
078e7b4a JB |
1340 | } |
1341 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1342 | ||
1343 | /* If purifying, and string starts with \ newline, | |
1344 | return zero instead. This is for doc strings | |
08564963 | 1345 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 1346 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
1347 | return make_number (0); |
1348 | ||
1349 | if (read_pure) | |
1350 | return make_pure_string (read_buffer, p - read_buffer); | |
1351 | else | |
1352 | return make_string (read_buffer, p - read_buffer); | |
1353 | } | |
1354 | ||
109d300c JB |
1355 | case '.': |
1356 | { | |
1357 | #ifdef LISP_FLOAT_TYPE | |
1358 | /* If a period is followed by a number, then we should read it | |
1359 | as a floating point number. Otherwise, it denotes a dotted | |
1360 | pair. */ | |
1361 | int next_char = READCHAR; | |
1362 | UNREAD (next_char); | |
1363 | ||
075027b1 | 1364 | if (! (next_char >= '0' && next_char <= '9')) |
109d300c JB |
1365 | #endif |
1366 | { | |
6428369f KH |
1367 | *pch = c; |
1368 | return Qnil; | |
109d300c JB |
1369 | } |
1370 | ||
1371 | /* Otherwise, we fall through! Note that the atom-reading loop | |
1372 | below will now loop at least once, assuring that we will not | |
1373 | try to UNREAD two characters in a row. */ | |
1374 | } | |
078e7b4a | 1375 | default: |
17634846 | 1376 | default_label: |
078e7b4a JB |
1377 | if (c <= 040) goto retry; |
1378 | { | |
1379 | register char *p = read_buffer; | |
481c6336 | 1380 | int quoted = 0; |
078e7b4a JB |
1381 | |
1382 | { | |
1383 | register char *end = read_buffer + read_buffer_size; | |
1384 | ||
1385 | while (c > 040 && | |
1386 | !(c == '\"' || c == '\'' || c == ';' || c == '?' | |
1387 | || c == '(' || c == ')' | |
109d300c JB |
1388 | #ifndef LISP_FLOAT_TYPE |
1389 | /* If we have floating-point support, then we need | |
1390 | to allow <digits><dot><digits>. */ | |
078e7b4a JB |
1391 | || c =='.' |
1392 | #endif /* not LISP_FLOAT_TYPE */ | |
1393 | || c == '[' || c == ']' || c == '#' | |
1394 | )) | |
1395 | { | |
1396 | if (p == end) | |
1397 | { | |
1398 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1399 | p += new - read_buffer; | |
1400 | read_buffer += new - read_buffer; | |
1401 | end = read_buffer + read_buffer_size; | |
1402 | } | |
1403 | if (c == '\\') | |
481c6336 RS |
1404 | { |
1405 | c = READCHAR; | |
1406 | quoted = 1; | |
1407 | } | |
078e7b4a JB |
1408 | *p++ = c; |
1409 | c = READCHAR; | |
1410 | } | |
1411 | ||
1412 | if (p == end) | |
1413 | { | |
1414 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1415 | p += new - read_buffer; | |
1416 | read_buffer += new - read_buffer; | |
1417 | /* end = read_buffer + read_buffer_size; */ | |
1418 | } | |
1419 | *p = 0; | |
1420 | if (c >= 0) | |
1421 | UNREAD (c); | |
1422 | } | |
1423 | ||
481c6336 RS |
1424 | if (!quoted) |
1425 | { | |
1426 | register char *p1; | |
1427 | register Lisp_Object val; | |
1428 | p1 = read_buffer; | |
1429 | if (*p1 == '+' || *p1 == '-') p1++; | |
1430 | /* Is it an integer? */ | |
1431 | if (p1 != p) | |
1432 | { | |
1433 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
dbc4e1c1 | 1434 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1435 | /* Integers can have trailing decimal points. */ |
1436 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
dbc4e1c1 | 1437 | #endif |
481c6336 RS |
1438 | if (p1 == p) |
1439 | /* It is an integer. */ | |
1440 | { | |
dbc4e1c1 | 1441 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1442 | if (p1[-1] == '.') |
1443 | p1[-1] = '\0'; | |
dbc4e1c1 | 1444 | #endif |
faca07fb RS |
1445 | if (sizeof (int) == sizeof (EMACS_INT)) |
1446 | XSETINT (val, atoi (read_buffer)); | |
1447 | else if (sizeof (long) == sizeof (EMACS_INT)) | |
1448 | XSETINT (val, atol (read_buffer)); | |
1449 | else | |
1450 | abort (); | |
481c6336 RS |
1451 | return val; |
1452 | } | |
1453 | } | |
078e7b4a | 1454 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1455 | if (isfloat_string (read_buffer)) |
1456 | return make_float (atof (read_buffer)); | |
078e7b4a | 1457 | #endif |
481c6336 | 1458 | } |
078e7b4a JB |
1459 | |
1460 | return intern (read_buffer); | |
1461 | } | |
1462 | } | |
1463 | } | |
1464 | \f | |
1465 | #ifdef LISP_FLOAT_TYPE | |
1466 | ||
078e7b4a JB |
1467 | #define LEAD_INT 1 |
1468 | #define DOT_CHAR 2 | |
1469 | #define TRAIL_INT 4 | |
1470 | #define E_CHAR 8 | |
1471 | #define EXP_INT 16 | |
1472 | ||
1473 | int | |
1474 | isfloat_string (cp) | |
1475 | register char *cp; | |
1476 | { | |
1477 | register state; | |
1478 | ||
1479 | state = 0; | |
1480 | if (*cp == '+' || *cp == '-') | |
1481 | cp++; | |
1482 | ||
075027b1 | 1483 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1484 | { |
1485 | state |= LEAD_INT; | |
075027b1 RS |
1486 | while (*cp >= '0' && *cp <= '9') |
1487 | cp++; | |
078e7b4a JB |
1488 | } |
1489 | if (*cp == '.') | |
1490 | { | |
1491 | state |= DOT_CHAR; | |
1492 | cp++; | |
1493 | } | |
075027b1 | 1494 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1495 | { |
1496 | state |= TRAIL_INT; | |
075027b1 | 1497 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1498 | cp++; |
1499 | } | |
1500 | if (*cp == 'e') | |
1501 | { | |
1502 | state |= E_CHAR; | |
1503 | cp++; | |
e73997a1 RS |
1504 | if (*cp == '+' || *cp == '-') |
1505 | cp++; | |
078e7b4a | 1506 | } |
078e7b4a | 1507 | |
075027b1 | 1508 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1509 | { |
1510 | state |= EXP_INT; | |
075027b1 | 1511 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1512 | cp++; |
1513 | } | |
37579d7c | 1514 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
078e7b4a | 1515 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
151bdc83 | 1516 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 1517 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
1518 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
1519 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a JB |
1520 | } |
1521 | #endif /* LISP_FLOAT_TYPE */ | |
1522 | \f | |
1523 | static Lisp_Object | |
1524 | read_vector (readcharfun) | |
1525 | Lisp_Object readcharfun; | |
1526 | { | |
1527 | register int i; | |
1528 | register int size; | |
1529 | register Lisp_Object *ptr; | |
1530 | register Lisp_Object tem, vector; | |
1531 | register struct Lisp_Cons *otem; | |
1532 | Lisp_Object len; | |
1533 | ||
1534 | tem = read_list (1, readcharfun); | |
1535 | len = Flength (tem); | |
1536 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
1537 | ||
1538 | ||
1539 | size = XVECTOR (vector)->size; | |
1540 | ptr = XVECTOR (vector)->contents; | |
1541 | for (i = 0; i < size; i++) | |
1542 | { | |
1543 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); | |
1544 | otem = XCONS (tem); | |
1545 | tem = Fcdr (tem); | |
1546 | free_cons (otem); | |
1547 | } | |
1548 | return vector; | |
1549 | } | |
1550 | ||
1551 | /* flag = 1 means check for ] to terminate rather than ) and . | |
1552 | flag = -1 means check for starting with defun | |
1553 | and make structure pure. */ | |
1554 | ||
1555 | static Lisp_Object | |
1556 | read_list (flag, readcharfun) | |
1557 | int flag; | |
1558 | register Lisp_Object readcharfun; | |
1559 | { | |
1560 | /* -1 means check next element for defun, | |
1561 | 0 means don't check, | |
1562 | 1 means already checked and found defun. */ | |
1563 | int defunflag = flag < 0 ? -1 : 0; | |
1564 | Lisp_Object val, tail; | |
1565 | register Lisp_Object elt, tem; | |
1566 | struct gcpro gcpro1, gcpro2; | |
20ea2964 | 1567 | int cancel = 0; |
078e7b4a | 1568 | |
17634846 RS |
1569 | /* Initialize this to 1 if we are reading a list. */ |
1570 | int first_in_list = flag <= 0; | |
1571 | ||
078e7b4a JB |
1572 | val = Qnil; |
1573 | tail = Qnil; | |
1574 | ||
1575 | while (1) | |
1576 | { | |
6428369f | 1577 | char ch; |
078e7b4a | 1578 | GCPRO2 (val, tail); |
17634846 | 1579 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 1580 | UNGCPRO; |
20ea2964 | 1581 | |
17634846 RS |
1582 | first_in_list = 0; |
1583 | ||
20ea2964 RS |
1584 | /* If purifying, and the list starts with #$, |
1585 | return 0 instead. This is a doc string reference | |
1586 | and it will be replaced anyway by Snarf-documentation, | |
1587 | so don't waste pure space with it. */ | |
1588 | if (EQ (elt, Vload_file_name) | |
1589 | && !NILP (Vpurify_flag) && NILP (Vdoc_file_name)) | |
1590 | cancel = 1; | |
1591 | ||
6428369f | 1592 | if (ch) |
078e7b4a JB |
1593 | { |
1594 | if (flag > 0) | |
1595 | { | |
6428369f | 1596 | if (ch == ']') |
078e7b4a | 1597 | return val; |
6428369f | 1598 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (") or . in a vector", 18), Qnil)); |
078e7b4a | 1599 | } |
6428369f | 1600 | if (ch == ')') |
078e7b4a | 1601 | return val; |
6428369f | 1602 | if (ch == '.') |
078e7b4a JB |
1603 | { |
1604 | GCPRO2 (val, tail); | |
265a9e55 | 1605 | if (!NILP (tail)) |
078e7b4a JB |
1606 | XCONS (tail)->cdr = read0 (readcharfun); |
1607 | else | |
1608 | val = read0 (readcharfun); | |
17634846 | 1609 | read1 (readcharfun, &ch, 0); |
078e7b4a | 1610 | UNGCPRO; |
6428369f | 1611 | if (ch == ')') |
20ea2964 | 1612 | return (cancel ? make_number (0) : val); |
078e7b4a JB |
1613 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
1614 | } | |
1615 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
1616 | } | |
1617 | tem = (read_pure && flag <= 0 | |
1618 | ? pure_cons (elt, Qnil) | |
1619 | : Fcons (elt, Qnil)); | |
265a9e55 | 1620 | if (!NILP (tail)) |
078e7b4a JB |
1621 | XCONS (tail)->cdr = tem; |
1622 | else | |
1623 | val = tem; | |
1624 | tail = tem; | |
1625 | if (defunflag < 0) | |
1626 | defunflag = EQ (elt, Qdefun); | |
1627 | else if (defunflag > 0) | |
1628 | read_pure = 1; | |
1629 | } | |
1630 | } | |
1631 | \f | |
1632 | Lisp_Object Vobarray; | |
1633 | Lisp_Object initial_obarray; | |
1634 | ||
d007f5c8 RS |
1635 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
1636 | ||
1637 | int oblookup_last_bucket_number; | |
1638 | ||
1639 | static int hash_string (); | |
1640 | Lisp_Object oblookup (); | |
1641 | ||
1642 | /* Get an error if OBARRAY is not an obarray. | |
1643 | If it is one, return it. */ | |
1644 | ||
078e7b4a JB |
1645 | Lisp_Object |
1646 | check_obarray (obarray) | |
1647 | Lisp_Object obarray; | |
1648 | { | |
cfff016d | 1649 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1650 | { |
1651 | /* If Vobarray is now invalid, force it to be valid. */ | |
1652 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
1653 | ||
1654 | obarray = wrong_type_argument (Qvectorp, obarray); | |
1655 | } | |
1656 | return obarray; | |
1657 | } | |
1658 | ||
d007f5c8 RS |
1659 | /* Intern the C string STR: return a symbol with that name, |
1660 | interned in the current obarray. */ | |
078e7b4a JB |
1661 | |
1662 | Lisp_Object | |
1663 | intern (str) | |
1664 | char *str; | |
1665 | { | |
1666 | Lisp_Object tem; | |
1667 | int len = strlen (str); | |
153a17b7 | 1668 | Lisp_Object obarray; |
078e7b4a | 1669 | |
153a17b7 | 1670 | obarray = Vobarray; |
cfff016d | 1671 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1672 | obarray = check_obarray (obarray); |
1673 | tem = oblookup (obarray, str, len); | |
cfff016d | 1674 | if (SYMBOLP (tem)) |
078e7b4a | 1675 | return tem; |
265a9e55 | 1676 | return Fintern ((!NILP (Vpurify_flag) |
078e7b4a JB |
1677 | ? make_pure_string (str, len) |
1678 | : make_string (str, len)), | |
1679 | obarray); | |
1680 | } | |
d007f5c8 | 1681 | \f |
078e7b4a JB |
1682 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
1683 | "Return the canonical symbol whose name is STRING.\n\ | |
1684 | If there is none, one is created by this function and returned.\n\ | |
1685 | A second optional argument specifies the obarray to use;\n\ | |
1686 | it defaults to the value of `obarray'.") | |
1687 | (str, obarray) | |
1688 | Lisp_Object str, obarray; | |
1689 | { | |
1690 | register Lisp_Object tem, sym, *ptr; | |
1691 | ||
265a9e55 | 1692 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1693 | obarray = check_obarray (obarray); |
1694 | ||
1695 | CHECK_STRING (str, 0); | |
1696 | ||
1697 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1698 | if (!INTEGERP (tem)) |
078e7b4a JB |
1699 | return tem; |
1700 | ||
265a9e55 | 1701 | if (!NILP (Vpurify_flag)) |
078e7b4a JB |
1702 | str = Fpurecopy (str); |
1703 | sym = Fmake_symbol (str); | |
1704 | ||
1705 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; | |
cfff016d | 1706 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
1707 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
1708 | else | |
1709 | XSYMBOL (sym)->next = 0; | |
1710 | *ptr = sym; | |
1711 | return sym; | |
1712 | } | |
1713 | ||
1714 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
1715 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ | |
1716 | A second optional argument specifies the obarray to use;\n\ | |
1717 | it defaults to the value of `obarray'.") | |
1718 | (str, obarray) | |
1719 | Lisp_Object str, obarray; | |
1720 | { | |
1721 | register Lisp_Object tem; | |
1722 | ||
265a9e55 | 1723 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1724 | obarray = check_obarray (obarray); |
1725 | ||
1726 | CHECK_STRING (str, 0); | |
1727 | ||
1728 | tem = oblookup (obarray, XSTRING (str)->data, XSTRING (str)->size); | |
cfff016d | 1729 | if (!INTEGERP (tem)) |
078e7b4a JB |
1730 | return tem; |
1731 | return Qnil; | |
1732 | } | |
d007f5c8 RS |
1733 | \f |
1734 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, | |
1735 | "Delete the symbol named NAME, if any, from OBARRAY.\n\ | |
1736 | The value is t if a symbol was found and deleted, nil otherwise.\n\ | |
1737 | NAME may be a string or a symbol. If it is a symbol, that symbol\n\ | |
1738 | is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\ | |
1739 | OBARRAY defaults to the value of the variable `obarray'.") | |
1740 | (name, obarray) | |
1741 | Lisp_Object name, obarray; | |
1742 | { | |
1743 | register Lisp_Object string, tem; | |
1744 | int hash; | |
1745 | ||
1746 | if (NILP (obarray)) obarray = Vobarray; | |
1747 | obarray = check_obarray (obarray); | |
1748 | ||
1749 | if (SYMBOLP (name)) | |
1750 | XSETSTRING (string, XSYMBOL (name)->name); | |
1751 | else | |
1752 | { | |
1753 | CHECK_STRING (name, 0); | |
1754 | string = name; | |
1755 | } | |
1756 | ||
1757 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); | |
1758 | if (INTEGERP (tem)) | |
1759 | return Qnil; | |
1760 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
1761 | if (SYMBOLP (name) && !EQ (name, tem)) | |
1762 | return Qnil; | |
1763 | ||
1764 | hash = oblookup_last_bucket_number; | |
1765 | ||
1766 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
1767 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
1768 | else | |
1769 | { | |
1770 | Lisp_Object tail, following; | |
1771 | ||
1772 | for (tail = XVECTOR (obarray)->contents[hash]; | |
1773 | XSYMBOL (tail)->next; | |
1774 | tail = following) | |
1775 | { | |
1776 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
1777 | if (EQ (following, tem)) | |
1778 | { | |
1779 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | return Qt; | |
1786 | } | |
1787 | \f | |
1788 | /* Return the symbol in OBARRAY whose names matches the string | |
1789 | of SIZE characters at PTR. If there is no such symbol in OBARRAY, | |
1790 | return nil. | |
1791 | ||
1792 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
1793 | |
1794 | Lisp_Object | |
a142f21b | 1795 | oblookup (obarray, ptr, size) |
078e7b4a JB |
1796 | Lisp_Object obarray; |
1797 | register char *ptr; | |
1798 | register int size; | |
1799 | { | |
7a70b397 RS |
1800 | int hash; |
1801 | int obsize; | |
078e7b4a JB |
1802 | register Lisp_Object tail; |
1803 | Lisp_Object bucket, tem; | |
1804 | ||
cfff016d | 1805 | if (!VECTORP (obarray) |
7c79a684 | 1806 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
1807 | { |
1808 | obarray = check_obarray (obarray); | |
1809 | obsize = XVECTOR (obarray)->size; | |
1810 | } | |
1811 | /* Combining next two lines breaks VMS C 2.3. */ | |
1812 | hash = hash_string (ptr, size); | |
1813 | hash %= obsize; | |
1814 | bucket = XVECTOR (obarray)->contents[hash]; | |
d007f5c8 | 1815 | oblookup_last_bucket_number = hash; |
078e7b4a JB |
1816 | if (XFASTINT (bucket) == 0) |
1817 | ; | |
cfff016d | 1818 | else if (!SYMBOLP (bucket)) |
078e7b4a | 1819 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
1820 | else |
1821 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 1822 | { |
d007f5c8 RS |
1823 | if (XSYMBOL (tail)->name->size == size |
1824 | && !bcmp (XSYMBOL (tail)->name->data, ptr, size)) | |
078e7b4a JB |
1825 | return tail; |
1826 | else if (XSYMBOL (tail)->next == 0) | |
1827 | break; | |
1828 | } | |
1805de4f | 1829 | XSETINT (tem, hash); |
078e7b4a JB |
1830 | return tem; |
1831 | } | |
1832 | ||
1833 | static int | |
1834 | hash_string (ptr, len) | |
1835 | unsigned char *ptr; | |
1836 | int len; | |
1837 | { | |
1838 | register unsigned char *p = ptr; | |
1839 | register unsigned char *end = p + len; | |
1840 | register unsigned char c; | |
1841 | register int hash = 0; | |
1842 | ||
1843 | while (p != end) | |
1844 | { | |
1845 | c = *p++; | |
1846 | if (c >= 0140) c -= 40; | |
1847 | hash = ((hash<<3) + (hash>>28) + c); | |
1848 | } | |
1849 | return hash & 07777777777; | |
1850 | } | |
d007f5c8 | 1851 | \f |
078e7b4a JB |
1852 | void |
1853 | map_obarray (obarray, fn, arg) | |
1854 | Lisp_Object obarray; | |
1855 | int (*fn) (); | |
1856 | Lisp_Object arg; | |
1857 | { | |
1858 | register int i; | |
1859 | register Lisp_Object tail; | |
1860 | CHECK_VECTOR (obarray, 1); | |
1861 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) | |
1862 | { | |
1863 | tail = XVECTOR (obarray)->contents[i]; | |
1864 | if (XFASTINT (tail) != 0) | |
1865 | while (1) | |
1866 | { | |
1867 | (*fn) (tail, arg); | |
1868 | if (XSYMBOL (tail)->next == 0) | |
1869 | break; | |
1805de4f | 1870 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
1871 | } |
1872 | } | |
1873 | } | |
1874 | ||
1875 | mapatoms_1 (sym, function) | |
1876 | Lisp_Object sym, function; | |
1877 | { | |
1878 | call1 (function, sym); | |
1879 | } | |
1880 | ||
1881 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
1882 | "Call FUNCTION on every symbol in OBARRAY.\n\ | |
1883 | OBARRAY defaults to the value of `obarray'.") | |
1884 | (function, obarray) | |
1885 | Lisp_Object function, obarray; | |
1886 | { | |
1887 | Lisp_Object tem; | |
1888 | ||
265a9e55 | 1889 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1890 | obarray = check_obarray (obarray); |
1891 | ||
1892 | map_obarray (obarray, mapatoms_1, function); | |
1893 | return Qnil; | |
1894 | } | |
1895 | ||
5e88a39e | 1896 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
1897 | |
1898 | void | |
1899 | init_obarray () | |
1900 | { | |
1901 | Lisp_Object oblength; | |
1902 | int hash; | |
1903 | Lisp_Object *tem; | |
1904 | ||
baf69866 | 1905 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a JB |
1906 | |
1907 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); | |
1908 | Vobarray = Fmake_vector (oblength, make_number (0)); | |
1909 | initial_obarray = Vobarray; | |
1910 | staticpro (&initial_obarray); | |
1911 | /* Intern nil in the obarray */ | |
1912 | /* These locals are to kludge around a pyramid compiler bug. */ | |
1913 | hash = hash_string ("nil", 3); | |
1914 | /* Separate statement here to avoid VAXC bug. */ | |
1915 | hash %= OBARRAY_SIZE; | |
1916 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
1917 | *tem = Qnil; | |
1918 | ||
1919 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); | |
1920 | XSYMBOL (Qnil)->function = Qunbound; | |
1921 | XSYMBOL (Qunbound)->value = Qunbound; | |
1922 | XSYMBOL (Qunbound)->function = Qunbound; | |
1923 | ||
1924 | Qt = intern ("t"); | |
1925 | XSYMBOL (Qnil)->value = Qnil; | |
1926 | XSYMBOL (Qnil)->plist = Qnil; | |
1927 | XSYMBOL (Qt)->value = Qt; | |
1928 | ||
1929 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
1930 | Vpurify_flag = Qt; | |
1931 | ||
1932 | Qvariable_documentation = intern ("variable-documentation"); | |
1933 | ||
1934 | read_buffer_size = 100; | |
1935 | read_buffer = (char *) malloc (read_buffer_size); | |
1936 | } | |
1937 | \f | |
1938 | void | |
1939 | defsubr (sname) | |
1940 | struct Lisp_Subr *sname; | |
1941 | { | |
1942 | Lisp_Object sym; | |
1943 | sym = intern (sname->symbol_name); | |
1805de4f | 1944 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1945 | } |
1946 | ||
1947 | #ifdef NOTDEF /* use fset in subr.el now */ | |
1948 | void | |
1949 | defalias (sname, string) | |
1950 | struct Lisp_Subr *sname; | |
1951 | char *string; | |
1952 | { | |
1953 | Lisp_Object sym; | |
1954 | sym = intern (string); | |
1805de4f | 1955 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
1956 | } |
1957 | #endif /* NOTDEF */ | |
1958 | ||
078e7b4a | 1959 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 1960 | to a C variable of type int. Sample call: */ |
950c215d | 1961 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 1962 | void |
e9e00ff2 | 1963 | defvar_int (namestring, address) |
078e7b4a JB |
1964 | char *namestring; |
1965 | int *address; | |
078e7b4a | 1966 | { |
1a0f90f7 | 1967 | Lisp_Object sym, val; |
078e7b4a | 1968 | sym = intern (namestring); |
1a0f90f7 | 1969 | val = allocate_misc (); |
47e28b2c | 1970 | XMISCTYPE (val) = Lisp_Misc_Intfwd; |
fc1e7df5 | 1971 | XINTFWD (val)->intvar = address; |
1a0f90f7 | 1972 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1973 | } |
1974 | ||
1975 | /* Similar but define a variable whose value is T if address contains 1, | |
1a0f90f7 | 1976 | NIL if address contains 0 */ |
078e7b4a | 1977 | void |
e9e00ff2 | 1978 | defvar_bool (namestring, address) |
078e7b4a JB |
1979 | char *namestring; |
1980 | int *address; | |
078e7b4a | 1981 | { |
1a0f90f7 | 1982 | Lisp_Object sym, val; |
078e7b4a | 1983 | sym = intern (namestring); |
1a0f90f7 | 1984 | val = allocate_misc (); |
47e28b2c | 1985 | XMISCTYPE (val) = Lisp_Misc_Boolfwd; |
fc1e7df5 | 1986 | XBOOLFWD (val)->boolvar = address; |
1a0f90f7 | 1987 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
1988 | } |
1989 | ||
1a0f90f7 KH |
1990 | /* Similar but define a variable whose value is the Lisp Object stored |
1991 | at address. Two versions: with and without gc-marking of the C | |
1992 | variable. The nopro version is used when that variable will be | |
1993 | gc-marked for some other reason, since marking the same slot twice | |
1994 | can cause trouble with strings. */ | |
078e7b4a | 1995 | void |
1a0f90f7 | 1996 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
1997 | char *namestring; |
1998 | Lisp_Object *address; | |
078e7b4a | 1999 | { |
1a0f90f7 | 2000 | Lisp_Object sym, val; |
078e7b4a | 2001 | sym = intern (namestring); |
1a0f90f7 | 2002 | val = allocate_misc (); |
47e28b2c | 2003 | XMISCTYPE (val) = Lisp_Misc_Objfwd; |
fc1e7df5 | 2004 | XOBJFWD (val)->objvar = address; |
1a0f90f7 | 2005 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
2006 | } |
2007 | ||
078e7b4a | 2008 | void |
1a0f90f7 | 2009 | defvar_lisp (namestring, address) |
078e7b4a JB |
2010 | char *namestring; |
2011 | Lisp_Object *address; | |
078e7b4a | 2012 | { |
1a0f90f7 KH |
2013 | defvar_lisp_nopro (namestring, address); |
2014 | staticpro (address); | |
078e7b4a JB |
2015 | } |
2016 | ||
2017 | #ifndef standalone | |
2018 | ||
2019 | /* Similar but define a variable whose value is the Lisp Object stored in | |
2836d9a4 KH |
2020 | the current buffer. address is the address of the slot in the buffer |
2021 | that is current now. */ | |
078e7b4a JB |
2022 | |
2023 | void | |
4360b0c6 | 2024 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
2025 | char *namestring; |
2026 | Lisp_Object *address; | |
4360b0c6 | 2027 | Lisp_Object type; |
078e7b4a JB |
2028 | char *doc; |
2029 | { | |
1a0f90f7 | 2030 | Lisp_Object sym, val; |
078e7b4a JB |
2031 | int offset; |
2032 | extern struct buffer buffer_local_symbols; | |
2033 | ||
2034 | sym = intern (namestring); | |
1a0f90f7 | 2035 | val = allocate_misc (); |
078e7b4a JB |
2036 | offset = (char *)address - (char *)current_buffer; |
2037 | ||
47e28b2c | 2038 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 2039 | XBUFFER_OBJFWD (val)->offset = offset; |
1a0f90f7 | 2040 | XSYMBOL (sym)->value = val; |
078e7b4a | 2041 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; |
4360b0c6 | 2042 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
2836d9a4 | 2043 | if (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)) == 0) |
078e7b4a JB |
2044 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
2045 | slot of buffer_local_flags */ | |
2046 | abort (); | |
2047 | } | |
2048 | ||
2049 | #endif /* standalone */ | |
950c215d KH |
2050 | |
2051 | /* Similar but define a variable whose value is the Lisp Object stored | |
4ac38690 | 2052 | at a particular offset in the current kboard object. */ |
950c215d KH |
2053 | |
2054 | void | |
4ac38690 | 2055 | defvar_kboard (namestring, offset) |
950c215d KH |
2056 | char *namestring; |
2057 | int offset; | |
2058 | { | |
2059 | Lisp_Object sym, val; | |
2060 | sym = intern (namestring); | |
2061 | val = allocate_misc (); | |
47e28b2c | 2062 | XMISCTYPE (val) = Lisp_Misc_Kboard_Objfwd; |
4ac38690 | 2063 | XKBOARD_OBJFWD (val)->offset = offset; |
950c215d KH |
2064 | XSYMBOL (sym)->value = val; |
2065 | } | |
078e7b4a | 2066 | \f |
279499f0 | 2067 | init_lread () |
078e7b4a | 2068 | { |
46947372 | 2069 | char *normal; |
e73997a1 | 2070 | int turn_off_warning = 0; |
078e7b4a | 2071 | |
279499f0 | 2072 | /* Compute the default load-path. */ |
46947372 JB |
2073 | #ifdef CANNOT_DUMP |
2074 | normal = PATH_LOADSEARCH; | |
e065a56e | 2075 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
2076 | #else |
2077 | if (NILP (Vpurify_flag)) | |
2078 | normal = PATH_LOADSEARCH; | |
279499f0 | 2079 | else |
46947372 | 2080 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 2081 | |
46947372 JB |
2082 | /* In a dumped Emacs, we normally have to reset the value of |
2083 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
2084 | uses ../lisp, instead of the path of the installed elisp | |
2085 | libraries. However, if it appears that Vload_path was changed | |
2086 | from the default before dumping, don't override that value. */ | |
4746118a JB |
2087 | if (initialized) |
2088 | { | |
2089 | Lisp_Object dump_path; | |
46947372 | 2090 | |
e065a56e | 2091 | dump_path = decode_env_path (0, PATH_DUMPLOADSEARCH); |
4746118a | 2092 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
2093 | { |
2094 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 2095 | if (!NILP (Vinstallation_directory)) |
80667d53 | 2096 | { |
74180aa4 | 2097 | /* Add to the path the lisp subdir of the |
3a3056e5 RS |
2098 | installation dir, if it exists. */ |
2099 | Lisp_Object tem, tem1; | |
74180aa4 RS |
2100 | tem = Fexpand_file_name (build_string ("lisp"), |
2101 | Vinstallation_directory); | |
3a3056e5 RS |
2102 | tem1 = Ffile_exists_p (tem); |
2103 | if (!NILP (tem1)) | |
2104 | { | |
2105 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
2106 | { |
2107 | turn_off_warning = 1; | |
2108 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
2109 | } | |
3a3056e5 RS |
2110 | } |
2111 | else | |
2112 | /* That dir doesn't exist, so add the build-time | |
2113 | Lisp dirs instead. */ | |
2114 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c RS |
2115 | |
2116 | /* Add site-list under the installation dir, if it exists. */ | |
2117 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
2118 | Vinstallation_directory); | |
2119 | tem1 = Ffile_exists_p (tem); | |
2120 | if (!NILP (tem1)) | |
2121 | { | |
2122 | if (NILP (Fmember (tem, Vload_path))) | |
2123 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
2124 | } | |
80667d53 RS |
2125 | } |
2126 | } | |
4746118a JB |
2127 | } |
2128 | else | |
e065a56e | 2129 | Vload_path = decode_env_path (0, normal); |
46947372 | 2130 | #endif |
279499f0 | 2131 | |
317073d5 RS |
2132 | #ifndef WINDOWSNT |
2133 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
2134 | almost never correct, thereby causing a warning to be printed out that | |
2135 | confuses users. Since PATH_LOADSEARCH is always overriden by the | |
2136 | EMACSLOADPATH environment variable below, disable the warning on NT. */ | |
2137 | ||
078e7b4a | 2138 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
2139 | if (!turn_off_warning) |
2140 | { | |
2141 | Lisp_Object path_tail; | |
078e7b4a | 2142 | |
e73997a1 RS |
2143 | for (path_tail = Vload_path; |
2144 | !NILP (path_tail); | |
2145 | path_tail = XCONS (path_tail)->cdr) | |
2146 | { | |
2147 | Lisp_Object dirfile; | |
2148 | dirfile = Fcar (path_tail); | |
2149 | if (STRINGP (dirfile)) | |
2150 | { | |
2151 | dirfile = Fdirectory_file_name (dirfile); | |
2152 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
2153 | fprintf (stderr, | |
2154 | "Warning: Lisp directory `%s' does not exist.\n", | |
2155 | XSTRING (Fcar (path_tail))->data); | |
2156 | } | |
2157 | } | |
2158 | } | |
317073d5 | 2159 | #endif /* WINDOWSNT */ |
46947372 JB |
2160 | |
2161 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
2162 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 2163 | #ifndef CANNOT_DUMP |
46947372 JB |
2164 | if (NILP (Vpurify_flag) |
2165 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 2166 | #endif |
279499f0 | 2167 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
2168 | |
2169 | Vvalues = Qnil; | |
2170 | ||
078e7b4a | 2171 | load_in_progress = 0; |
d2c6be7f RS |
2172 | |
2173 | load_descriptor_list = Qnil; | |
078e7b4a JB |
2174 | } |
2175 | ||
2176 | void | |
279499f0 | 2177 | syms_of_lread () |
078e7b4a JB |
2178 | { |
2179 | defsubr (&Sread); | |
2180 | defsubr (&Sread_from_string); | |
2181 | defsubr (&Sintern); | |
2182 | defsubr (&Sintern_soft); | |
d007f5c8 | 2183 | defsubr (&Sunintern); |
078e7b4a | 2184 | defsubr (&Sload); |
228d4b1c | 2185 | defsubr (&Seval_buffer); |
078e7b4a JB |
2186 | defsubr (&Seval_region); |
2187 | defsubr (&Sread_char); | |
2188 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 2189 | defsubr (&Sread_event); |
078e7b4a JB |
2190 | defsubr (&Sget_file_char); |
2191 | defsubr (&Smapatoms); | |
2192 | ||
2193 | DEFVAR_LISP ("obarray", &Vobarray, | |
2194 | "Symbol table for use by `intern' and `read'.\n\ | |
2195 | It is a vector whose length ought to be prime for best results.\n\ | |
2196 | The vector's contents don't make sense if examined from Lisp programs;\n\ | |
2197 | to find all the symbols in an obarray, use `mapatoms'."); | |
2198 | ||
2199 | DEFVAR_LISP ("values", &Vvalues, | |
2200 | "List of values of all expressions which were read, evaluated and printed.\n\ | |
2201 | Order is reverse chronological."); | |
2202 | ||
2203 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
2204 | "Stream for read to get input from.\n\ | |
2205 | See documentation of `read' for possible values."); | |
2206 | Vstandard_input = Qt; | |
2207 | ||
2208 | DEFVAR_LISP ("load-path", &Vload_path, | |
2209 | "*List of directories to search for files to load.\n\ | |
2210 | Each element is a string (directory name) or nil (try default directory).\n\ | |
2211 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ | |
692f86ad | 2212 | otherwise to default specified by file `paths.h' when Emacs was built."); |
078e7b4a JB |
2213 | |
2214 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, | |
2215 | "Non-nil iff inside of `load'."); | |
2216 | ||
2217 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
2218 | "An alist of expressions to be evalled when particular files are loaded.\n\ | |
2219 | Each element looks like (FILENAME FORMS...).\n\ | |
2220 | When `load' is run and the file-name argument is FILENAME,\n\ | |
2221 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ | |
2222 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ | |
2223 | with no directory specified, since that is how `load' is normally called.\n\ | |
2224 | An error in FORMS does not undo the load,\n\ | |
2225 | but does prevent execution of the rest of the FORMS."); | |
2226 | Vafter_load_alist = Qnil; | |
2227 | ||
ae321d28 RS |
2228 | DEFVAR_LISP ("load-history", &Vload_history, |
2229 | "Alist mapping source file names to symbols and features.\n\ | |
2230 | Each alist element is a list that starts with a file name,\n\ | |
2231 | except for one element (optional) that starts with nil and describes\n\ | |
2232 | definitions evaluated from buffers not visiting files.\n\ | |
2233 | The remaining elements of each list are symbols defined as functions\n\ | |
2234 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); | |
2235 | Vload_history = Qnil; | |
2236 | ||
20ea2964 RS |
2237 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
2238 | "Full name of file being loaded by `load'."); | |
2239 | Vload_file_name = Qnil; | |
2240 | ||
8a1f1537 RS |
2241 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
2242 | "Used for internal purposes by `load'."); | |
ae321d28 RS |
2243 | Vcurrent_load_list = Qnil; |
2244 | ||
84a15045 RS |
2245 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
2246 | "Function used by `load' and `eval-region' for reading expressions.\n\ | |
2247 | The default is nil, which means use the function `read'."); | |
2248 | Vload_read_function = Qnil; | |
2249 | ||
d2c6be7f RS |
2250 | load_descriptor_list = Qnil; |
2251 | staticpro (&load_descriptor_list); | |
2252 | ||
8a1f1537 RS |
2253 | Qcurrent_load_list = intern ("current-load-list"); |
2254 | staticpro (&Qcurrent_load_list); | |
2255 | ||
078e7b4a JB |
2256 | Qstandard_input = intern ("standard-input"); |
2257 | staticpro (&Qstandard_input); | |
2258 | ||
2259 | Qread_char = intern ("read-char"); | |
2260 | staticpro (&Qread_char); | |
2261 | ||
2262 | Qget_file_char = intern ("get-file-char"); | |
2263 | staticpro (&Qget_file_char); | |
7bd279cd | 2264 | |
17634846 RS |
2265 | Qbackquote = intern ("`"); |
2266 | staticpro (&Qbackquote); | |
2267 | Qcomma = intern (","); | |
2268 | staticpro (&Qcomma); | |
2269 | Qcomma_at = intern (",@"); | |
2270 | staticpro (&Qcomma_at); | |
2271 | Qcomma_dot = intern (",."); | |
2272 | staticpro (&Qcomma_dot); | |
2273 | ||
7bd279cd RS |
2274 | Qascii_character = intern ("ascii-character"); |
2275 | staticpro (&Qascii_character); | |
c2225d00 RS |
2276 | |
2277 | Qload = intern ("load"); | |
2278 | staticpro (&Qload); | |
20ea2964 RS |
2279 | |
2280 | Qload_file_name = intern ("load-file-name"); | |
2281 | staticpro (&Qload_file_name); | |
078e7b4a | 2282 | } |