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 | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
078e7b4a JB |
21 | |
22 | ||
98280b76 | 23 | #include <config.h> |
078e7b4a JB |
24 | #include <stdio.h> |
25 | #include <sys/types.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/file.h> | |
2c1b5dbe | 28 | #include <errno.h> |
078e7b4a JB |
29 | #include "lisp.h" |
30 | ||
31 | #ifndef standalone | |
32 | #include "buffer.h" | |
2a6b3537 | 33 | #include <paths.h> |
078e7b4a | 34 | #include "commands.h" |
e37c0805 | 35 | #include "keyboard.h" |
7bd279cd | 36 | #include "termhooks.h" |
078e7b4a JB |
37 | #endif |
38 | ||
39 | #ifdef lint | |
40 | #include <sys/inode.h> | |
41 | #endif /* lint */ | |
42 | ||
79051982 RS |
43 | #ifdef MSDOS |
44 | #if __DJGPP__ < 2 | |
45 | #include <unistd.h> /* to get X_OK */ | |
46 | #endif | |
47 | #include "msdos.h" | |
48 | #endif | |
49 | ||
078e7b4a JB |
50 | #ifndef X_OK |
51 | #define X_OK 01 | |
52 | #endif | |
53 | ||
54 | #ifdef LISP_FLOAT_TYPE | |
93b91208 JB |
55 | #ifdef STDC_HEADERS |
56 | #include <stdlib.h> | |
57 | #endif | |
23a71bd6 | 58 | |
078e7b4a JB |
59 | #include <math.h> |
60 | #endif /* LISP_FLOAT_TYPE */ | |
61 | ||
c011e9a5 RS |
62 | #ifdef HAVE_SETLOCALE |
63 | #include <locale.h> | |
64 | #endif /* HAVE_SETLOCALE */ | |
65 | ||
f7d279f0 RS |
66 | #ifndef O_RDONLY |
67 | #define O_RDONLY 0 | |
68 | #endif | |
69 | ||
2c1b5dbe KH |
70 | extern int errno; |
71 | ||
8a1f1537 | 72 | Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list; |
078e7b4a | 73 | Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist; |
20ea2964 | 74 | Lisp_Object Qascii_character, Qload, Qload_file_name; |
2b6cae0c | 75 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction; |
7bd279cd RS |
76 | |
77 | extern Lisp_Object Qevent_symbol_element_mask; | |
078e7b4a JB |
78 | |
79 | /* non-zero if inside `load' */ | |
80 | int load_in_progress; | |
81 | ||
1521a8fa RS |
82 | /* Directory in which the sources were found. */ |
83 | Lisp_Object Vsource_directory; | |
84 | ||
078e7b4a JB |
85 | /* Search path for files to be loaded. */ |
86 | Lisp_Object Vload_path; | |
87 | ||
ae321d28 RS |
88 | /* This is the user-visible association list that maps features to |
89 | lists of defs in their load files. */ | |
90 | Lisp_Object Vload_history; | |
91 | ||
20ea2964 | 92 | /* This is used to build the load history. */ |
ae321d28 RS |
93 | Lisp_Object Vcurrent_load_list; |
94 | ||
20ea2964 RS |
95 | /* Name of file actually being read by `load'. */ |
96 | Lisp_Object Vload_file_name; | |
97 | ||
84a15045 RS |
98 | /* Function to use for reading, in `load' and friends. */ |
99 | Lisp_Object Vload_read_function; | |
100 | ||
b2a30870 RS |
101 | /* Nonzero means load should forcibly load all dynamic doc strings. */ |
102 | static int load_force_doc_strings; | |
103 | ||
d2c6be7f RS |
104 | /* List of descriptors now open for Fload. */ |
105 | static Lisp_Object load_descriptor_list; | |
106 | ||
b2a30870 | 107 | /* File for get_file_char to read from. Use by load. */ |
078e7b4a JB |
108 | static FILE *instream; |
109 | ||
110 | /* When nonzero, read conses in pure space */ | |
111 | static int read_pure; | |
112 | ||
b2a30870 | 113 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
078e7b4a JB |
114 | static int read_from_string_index; |
115 | static int read_from_string_limit; | |
17634846 | 116 | |
b2a30870 RS |
117 | /* This contains the last string skipped with #@. */ |
118 | static char *saved_doc_string; | |
119 | /* Length of buffer allocated in saved_doc_string. */ | |
120 | static int saved_doc_string_size; | |
121 | /* Length of actual data in saved_doc_string. */ | |
122 | static int saved_doc_string_length; | |
123 | /* This is the file position that string came from. */ | |
124 | static int saved_doc_string_position; | |
125 | ||
17634846 RS |
126 | /* Nonzero means inside a new-style backquote |
127 | with no surrounding parentheses. | |
128 | Fread initializes this to zero, so we need not specbind it | |
129 | or worry about what happens to it when there is an error. */ | |
130 | static int new_backquote_flag; | |
078e7b4a JB |
131 | \f |
132 | /* Handle unreading and rereading of characters. | |
133 | Write READCHAR to read a character, | |
134 | UNREAD(c) to unread c to be read again. */ | |
135 | ||
136 | #define READCHAR readchar (readcharfun) | |
137 | #define UNREAD(c) unreadchar (readcharfun, c) | |
138 | ||
139 | static int | |
140 | readchar (readcharfun) | |
141 | Lisp_Object readcharfun; | |
142 | { | |
143 | Lisp_Object tem; | |
144 | register struct buffer *inbuffer; | |
145 | register int c, mpos; | |
146 | ||
cfff016d | 147 | if (BUFFERP (readcharfun)) |
078e7b4a JB |
148 | { |
149 | inbuffer = XBUFFER (readcharfun); | |
150 | ||
151 | if (BUF_PT (inbuffer) >= BUF_ZV (inbuffer)) | |
152 | return -1; | |
153 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, BUF_PT (inbuffer)); | |
154 | SET_BUF_PT (inbuffer, BUF_PT (inbuffer) + 1); | |
155 | ||
156 | return c; | |
157 | } | |
cfff016d | 158 | if (MARKERP (readcharfun)) |
078e7b4a JB |
159 | { |
160 | inbuffer = XMARKER (readcharfun)->buffer; | |
161 | ||
162 | mpos = marker_position (readcharfun); | |
163 | ||
164 | if (mpos > BUF_ZV (inbuffer) - 1) | |
165 | return -1; | |
166 | c = *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer, mpos); | |
167 | if (mpos != BUF_GPT (inbuffer)) | |
168 | XMARKER (readcharfun)->bufpos++; | |
169 | else | |
170 | Fset_marker (readcharfun, make_number (mpos + 1), | |
171 | Fmarker_buffer (readcharfun)); | |
172 | return c; | |
173 | } | |
174 | if (EQ (readcharfun, Qget_file_char)) | |
2c1b5dbe KH |
175 | { |
176 | c = getc (instream); | |
177 | #ifdef EINTR | |
178 | /* Interrupted reads have been observed while reading over the network */ | |
179 | while (c == EOF && ferror (instream) && errno == EINTR) | |
180 | { | |
181 | clearerr (instream); | |
182 | c = getc (instream); | |
183 | } | |
184 | #endif | |
185 | return c; | |
186 | } | |
078e7b4a | 187 | |
cfff016d | 188 | if (STRINGP (readcharfun)) |
078e7b4a JB |
189 | { |
190 | register int c; | |
191 | /* This used to be return of a conditional expression, | |
192 | but that truncated -1 to a char on VMS. */ | |
193 | if (read_from_string_index < read_from_string_limit) | |
194 | c = XSTRING (readcharfun)->data[read_from_string_index++]; | |
195 | else | |
196 | c = -1; | |
197 | return c; | |
198 | } | |
199 | ||
200 | tem = call0 (readcharfun); | |
201 | ||
265a9e55 | 202 | if (NILP (tem)) |
078e7b4a JB |
203 | return -1; |
204 | return XINT (tem); | |
205 | } | |
206 | ||
207 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
208 | If the stream is a user function, call it with the char as argument. */ | |
209 | ||
210 | static void | |
211 | unreadchar (readcharfun, c) | |
212 | Lisp_Object readcharfun; | |
213 | int c; | |
214 | { | |
92fddec9 KH |
215 | if (c == -1) |
216 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
217 | since readchar didn't advance it when we read it. */ | |
218 | ; | |
cfff016d | 219 | else if (BUFFERP (readcharfun)) |
078e7b4a JB |
220 | { |
221 | if (XBUFFER (readcharfun) == current_buffer) | |
222 | SET_PT (point - 1); | |
223 | else | |
224 | SET_BUF_PT (XBUFFER (readcharfun), BUF_PT (XBUFFER (readcharfun)) - 1); | |
225 | } | |
cfff016d | 226 | else if (MARKERP (readcharfun)) |
078e7b4a | 227 | XMARKER (readcharfun)->bufpos--; |
cfff016d | 228 | else if (STRINGP (readcharfun)) |
078e7b4a JB |
229 | read_from_string_index--; |
230 | else if (EQ (readcharfun, Qget_file_char)) | |
231 | ungetc (c, instream); | |
232 | else | |
233 | call1 (readcharfun, make_number (c)); | |
234 | } | |
235 | ||
236 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
237 | \f | |
238 | /* get a character from the tty */ | |
239 | ||
3d9b22be JB |
240 | extern Lisp_Object read_char (); |
241 | ||
f42be754 JB |
242 | /* Read input events until we get one that's acceptable for our purposes. |
243 | ||
244 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
245 | until we get a character we like, and then stuffed into | |
246 | unread_switch_frame. | |
247 | ||
248 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
249 | if the unmodified version of the symbol has a Qascii_character | |
250 | property, and use that character, if present. | |
251 | ||
252 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
253 | get isn't an ASCII character with modifiers. If it's zero but | |
254 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
255 | character. */ | |
cc39bc38 | 256 | |
f42be754 JB |
257 | Lisp_Object |
258 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii) | |
259 | int no_switch_frame, ascii_required, error_nonascii; | |
260 | { | |
261 | #ifdef standalone | |
262 | return make_number (getchar ()); | |
263 | #else | |
153a17b7 KH |
264 | register Lisp_Object val, delayed_switch_frame; |
265 | ||
266 | delayed_switch_frame = Qnil; | |
f42be754 JB |
267 | |
268 | /* Read until we get an acceptable event. */ | |
269 | retry: | |
270 | val = read_char (0, 0, 0, Qnil, 0); | |
271 | ||
cfff016d | 272 | if (BUFFERP (val)) |
6c82d689 KH |
273 | goto retry; |
274 | ||
f42be754 | 275 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 276 | character. This is better than signaling an error just because |
f42be754 JB |
277 | the last characters were typed to a separate minibuffer frame, |
278 | for example. Eventually, some code which can deal with | |
279 | switch-frame events will read it and process it. */ | |
280 | if (no_switch_frame | |
281 | && EVENT_HAS_PARAMETERS (val) | |
282 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
283 | { | |
284 | delayed_switch_frame = val; | |
285 | goto retry; | |
286 | } | |
287 | ||
288 | if (ascii_required) | |
289 | { | |
290 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 291 | if (SYMBOLP (val)) |
f42be754 JB |
292 | { |
293 | Lisp_Object tem, tem1, tem2; | |
294 | tem = Fget (val, Qevent_symbol_element_mask); | |
295 | if (!NILP (tem)) | |
296 | { | |
297 | tem1 = Fget (Fcar (tem), Qascii_character); | |
298 | /* Merge this symbol's modifier bits | |
299 | with the ASCII equivalent of its basic code. */ | |
300 | if (!NILP (tem1)) | |
baf69866 | 301 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
302 | } |
303 | } | |
304 | ||
305 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 306 | if (!INTEGERP (val)) |
f42be754 JB |
307 | { |
308 | if (error_nonascii) | |
309 | { | |
1ec84625 | 310 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
311 | error ("Non-character input-event"); |
312 | } | |
313 | else | |
314 | goto retry; | |
315 | } | |
316 | } | |
317 | ||
318 | if (! NILP (delayed_switch_frame)) | |
319 | unread_switch_frame = delayed_switch_frame; | |
320 | ||
321 | return val; | |
322 | #endif | |
323 | } | |
324 | ||
078e7b4a JB |
325 | DEFUN ("read-char", Fread_char, Sread_char, 0, 0, 0, |
326 | "Read a character from the command input (keyboard or macro).\n\ | |
e51e47f7 JB |
327 | It is returned as a number.\n\ |
328 | If the user generates an event which is not a character (i.e. a mouse\n\ | |
e37c0805 JB |
329 | click or function key event), `read-char' signals an error. As an\n\ |
330 | exception, switch-frame events are put off until non-ASCII events can\n\ | |
331 | be read.\n\ | |
332 | If you want to read non-character events, or ignore them, call\n\ | |
333 | `read-event' or `read-char-exclusive' instead.") | |
078e7b4a JB |
334 | () |
335 | { | |
f42be754 | 336 | return read_filtered_event (1, 1, 1); |
078e7b4a JB |
337 | } |
338 | ||
078e7b4a JB |
339 | DEFUN ("read-event", Fread_event, Sread_event, 0, 0, 0, |
340 | "Read an event object from the input stream.") | |
341 | () | |
342 | { | |
f42be754 | 343 | return read_filtered_event (0, 0, 0); |
078e7b4a JB |
344 | } |
345 | ||
346 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 0, 0, | |
347 | "Read a character from the command input (keyboard or macro).\n\ | |
cc39bc38 | 348 | It is returned as a number. Non-character events are ignored.") |
078e7b4a JB |
349 | () |
350 | { | |
f42be754 | 351 | return read_filtered_event (1, 1, 0); |
078e7b4a | 352 | } |
078e7b4a JB |
353 | |
354 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
355 | "Don't use this yourself.") | |
356 | () | |
357 | { | |
358 | register Lisp_Object val; | |
1805de4f | 359 | XSETINT (val, getc (instream)); |
078e7b4a JB |
360 | return val; |
361 | } | |
362 | \f | |
363 | static void readevalloop (); | |
364 | static Lisp_Object load_unwind (); | |
d2c6be7f | 365 | static Lisp_Object load_descriptor_unwind (); |
078e7b4a JB |
366 | |
367 | DEFUN ("load", Fload, Sload, 1, 4, 0, | |
368 | "Execute a file of Lisp code named FILE.\n\ | |
369 | First try FILE with `.elc' appended, then try with `.el',\n\ | |
370 | then try FILE unmodified.\n\ | |
371 | This function searches the directories in `load-path'.\n\ | |
372 | If optional second arg NOERROR is non-nil,\n\ | |
373 | report no error if FILE doesn't exist.\n\ | |
374 | Print messages at start and end of loading unless\n\ | |
375 | optional third arg NOMESSAGE is non-nil.\n\ | |
376 | If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\ | |
377 | suffixes `.elc' or `.el' to the specified name FILE.\n\ | |
378 | Return t if file exists.") | |
0745dce9 RS |
379 | (file, noerror, nomessage, nosuffix) |
380 | Lisp_Object file, noerror, nomessage, nosuffix; | |
078e7b4a JB |
381 | { |
382 | register FILE *stream; | |
383 | register int fd = -1; | |
384 | register Lisp_Object lispstream; | |
078e7b4a JB |
385 | int count = specpdl_ptr - specpdl; |
386 | Lisp_Object temp; | |
387 | struct gcpro gcpro1; | |
388 | Lisp_Object found; | |
51ac6f83 RS |
389 | /* 1 means inhibit the message at the beginning. */ |
390 | int nomessage1 = 0; | |
c2225d00 | 391 | Lisp_Object handler; |
317073d5 | 392 | #ifdef DOS_NT |
23a71bd6 | 393 | char *dosmode = "rt"; |
317073d5 | 394 | #endif /* DOS_NT */ |
078e7b4a | 395 | |
0745dce9 | 396 | CHECK_STRING (file, 0); |
078e7b4a | 397 | |
c2225d00 | 398 | /* If file name is magic, call the handler. */ |
0745dce9 | 399 | handler = Ffind_file_name_handler (file, Qload); |
c2225d00 | 400 | if (!NILP (handler)) |
0745dce9 | 401 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); |
c2225d00 | 402 | |
07a0bda3 RS |
403 | /* Do this after the handler to avoid |
404 | the need to gcpro noerror, nomessage and nosuffix. | |
405 | (Below here, we care only whether they are nil or not.) */ | |
0745dce9 | 406 | file = Fsubstitute_in_file_name (file); |
07a0bda3 | 407 | |
078e7b4a JB |
408 | /* Avoid weird lossage with null string as arg, |
409 | since it would try to load a directory as a Lisp file */ | |
0745dce9 | 410 | if (XSTRING (file)->size > 0) |
078e7b4a | 411 | { |
0745dce9 RS |
412 | GCPRO1 (file); |
413 | fd = openp (Vload_path, file, !NILP (nosuffix) ? "" : ".elc:.el:", | |
078e7b4a | 414 | &found, 0); |
5a6e5452 | 415 | UNGCPRO; |
078e7b4a JB |
416 | } |
417 | ||
418 | if (fd < 0) | |
419 | { | |
265a9e55 | 420 | if (NILP (noerror)) |
078e7b4a JB |
421 | while (1) |
422 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
0745dce9 | 423 | Fcons (file, Qnil))); |
078e7b4a JB |
424 | else |
425 | return Qnil; | |
426 | } | |
427 | ||
428 | if (!bcmp (&(XSTRING (found)->data[XSTRING (found)->size - 4]), | |
429 | ".elc", 4)) | |
430 | { | |
431 | struct stat s1, s2; | |
432 | int result; | |
433 | ||
317073d5 | 434 | #ifdef DOS_NT |
23a71bd6 | 435 | dosmode = "rb"; |
317073d5 | 436 | #endif /* DOS_NT */ |
4ff37b08 | 437 | stat ((char *)XSTRING (found)->data, &s1); |
078e7b4a | 438 | XSTRING (found)->data[XSTRING (found)->size - 1] = 0; |
4ff37b08 | 439 | result = stat ((char *)XSTRING (found)->data, &s2); |
078e7b4a | 440 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
51ac6f83 RS |
441 | { |
442 | message ("Source file `%s' newer than byte-compiled file", | |
443 | XSTRING (found)->data); | |
444 | /* Don't immediately overwrite this message. */ | |
445 | if (!noninteractive) | |
446 | nomessage1 = 1; | |
447 | } | |
078e7b4a JB |
448 | XSTRING (found)->data[XSTRING (found)->size - 1] = 'c'; |
449 | } | |
450 | ||
317073d5 | 451 | #ifdef DOS_NT |
23a71bd6 RS |
452 | close (fd); |
453 | stream = fopen ((char *) XSTRING (found)->data, dosmode); | |
317073d5 | 454 | #else /* not DOS_NT */ |
078e7b4a | 455 | stream = fdopen (fd, "r"); |
317073d5 | 456 | #endif /* not DOS_NT */ |
078e7b4a JB |
457 | if (stream == 0) |
458 | { | |
459 | close (fd); | |
0745dce9 | 460 | error ("Failure to create stdio stream for %s", XSTRING (file)->data); |
078e7b4a JB |
461 | } |
462 | ||
51ac6f83 | 463 | if (NILP (nomessage) && !nomessage1) |
0745dce9 | 464 | message ("Loading %s...", XSTRING (file)->data); |
078e7b4a | 465 | |
0745dce9 | 466 | GCPRO1 (file); |
838abf56 KH |
467 | lispstream = Fcons (Qnil, Qnil); |
468 | XSETFASTINT (XCONS (lispstream)->car, (EMACS_UINT)stream >> 16); | |
469 | XSETFASTINT (XCONS (lispstream)->cdr, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 470 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f | 471 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 472 | specbind (Qload_file_name, found); |
d2c6be7f RS |
473 | load_descriptor_list |
474 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 475 | load_in_progress++; |
0745dce9 | 476 | readevalloop (Qget_file_char, stream, file, Feval, 0); |
078e7b4a JB |
477 | unbind_to (count, Qnil); |
478 | ||
479 | /* Run any load-hooks for this file. */ | |
0745dce9 | 480 | temp = Fassoc (file, Vafter_load_alist); |
265a9e55 | 481 | if (!NILP (temp)) |
078e7b4a JB |
482 | Fprogn (Fcdr (temp)); |
483 | UNGCPRO; | |
484 | ||
b2a30870 RS |
485 | if (saved_doc_string) |
486 | free (saved_doc_string); | |
487 | saved_doc_string = 0; | |
488 | saved_doc_string_size = 0; | |
489 | ||
265a9e55 | 490 | if (!noninteractive && NILP (nomessage)) |
0745dce9 | 491 | message ("Loading %s...done", XSTRING (file)->data); |
078e7b4a JB |
492 | return Qt; |
493 | } | |
494 | ||
495 | static Lisp_Object | |
496 | load_unwind (stream) /* used as unwind-protect function in load */ | |
497 | Lisp_Object stream; | |
498 | { | |
c8bdaa8c RS |
499 | fclose ((FILE *) (XFASTINT (XCONS (stream)->car) << 16 |
500 | | XFASTINT (XCONS (stream)->cdr))); | |
078e7b4a JB |
501 | if (--load_in_progress < 0) load_in_progress = 0; |
502 | return Qnil; | |
503 | } | |
504 | ||
d2c6be7f RS |
505 | static Lisp_Object |
506 | load_descriptor_unwind (oldlist) | |
507 | Lisp_Object oldlist; | |
508 | { | |
509 | load_descriptor_list = oldlist; | |
838abf56 | 510 | return Qnil; |
d2c6be7f RS |
511 | } |
512 | ||
513 | /* Close all descriptors in use for Floads. | |
514 | This is used when starting a subprocess. */ | |
515 | ||
516 | void | |
517 | close_load_descs () | |
518 | { | |
519 | Lisp_Object tail; | |
520 | for (tail = load_descriptor_list; !NILP (tail); tail = XCONS (tail)->cdr) | |
521 | close (XFASTINT (XCONS (tail)->car)); | |
522 | } | |
078e7b4a JB |
523 | \f |
524 | static int | |
525 | complete_filename_p (pathname) | |
526 | Lisp_Object pathname; | |
527 | { | |
528 | register unsigned char *s = XSTRING (pathname)->data; | |
317073d5 RS |
529 | return (IS_DIRECTORY_SEP (s[0]) |
530 | || (XSTRING (pathname)->size > 2 | |
531 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) | |
078e7b4a JB |
532 | #ifdef ALTOS |
533 | || *s == '@' | |
534 | #endif | |
535 | #ifdef VMS | |
536 | || index (s, ':') | |
537 | #endif /* VMS */ | |
538 | ); | |
539 | } | |
540 | ||
541 | /* Search for a file whose name is STR, looking in directories | |
542 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
543 | SUFFIX is a string containing possible suffixes separated by colons. | |
544 | On success, returns a file descriptor. On failure, returns -1. | |
545 | ||
546 | EXEC_ONLY nonzero means don't open the files, | |
547 | just look for one that is executable. In this case, | |
548 | returns 1 on success. | |
549 | ||
550 | If STOREPTR is nonzero, it points to a slot where the name of | |
551 | the file actually found should be stored as a Lisp string. | |
552 | Nil is stored there on failure. */ | |
553 | ||
554 | int | |
555 | openp (path, str, suffix, storeptr, exec_only) | |
556 | Lisp_Object path, str; | |
557 | char *suffix; | |
558 | Lisp_Object *storeptr; | |
559 | int exec_only; | |
560 | { | |
561 | register int fd; | |
562 | int fn_size = 100; | |
563 | char buf[100]; | |
564 | register char *fn = buf; | |
565 | int absolute = 0; | |
566 | int want_size; | |
567 | register Lisp_Object filename; | |
568 | struct stat st; | |
5a6e5452 | 569 | struct gcpro gcpro1; |
078e7b4a | 570 | |
5a6e5452 | 571 | GCPRO1 (str); |
078e7b4a JB |
572 | if (storeptr) |
573 | *storeptr = Qnil; | |
574 | ||
575 | if (complete_filename_p (str)) | |
576 | absolute = 1; | |
577 | ||
265a9e55 | 578 | for (; !NILP (path); path = Fcdr (path)) |
078e7b4a JB |
579 | { |
580 | char *nsuffix; | |
581 | ||
582 | filename = Fexpand_file_name (str, Fcar (path)); | |
583 | if (!complete_filename_p (filename)) | |
584 | /* If there are non-absolute elts in PATH (eg ".") */ | |
585 | /* Of course, this could conceivably lose if luser sets | |
586 | default-directory to be something non-absolute... */ | |
587 | { | |
588 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
589 | if (!complete_filename_p (filename)) | |
590 | /* Give up on this path element! */ | |
591 | continue; | |
592 | } | |
593 | ||
594 | /* Calculate maximum size of any filename made from | |
595 | this path element/specified file name and any possible suffix. */ | |
596 | want_size = strlen (suffix) + XSTRING (filename)->size + 1; | |
597 | if (fn_size < want_size) | |
598 | fn = (char *) alloca (fn_size = 100 + want_size); | |
599 | ||
600 | nsuffix = suffix; | |
601 | ||
602 | /* Loop over suffixes. */ | |
603 | while (1) | |
604 | { | |
605 | char *esuffix = (char *) index (nsuffix, ':'); | |
606 | int lsuffix = esuffix ? esuffix - nsuffix : strlen (nsuffix); | |
607 | ||
608 | /* Concatenate path element/specified name with the suffix. */ | |
609 | strncpy (fn, XSTRING (filename)->data, XSTRING (filename)->size); | |
610 | fn[XSTRING (filename)->size] = 0; | |
611 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ | |
612 | strncat (fn, nsuffix, lsuffix); | |
613 | ||
614 | /* Ignore file if it's a directory. */ | |
615 | if (stat (fn, &st) >= 0 | |
616 | && (st.st_mode & S_IFMT) != S_IFDIR) | |
617 | { | |
618 | /* Check that we can access or open it. */ | |
619 | if (exec_only) | |
620 | fd = (access (fn, X_OK) == 0) ? 1 : -1; | |
621 | else | |
f7d279f0 | 622 | fd = open (fn, O_RDONLY, 0); |
078e7b4a JB |
623 | |
624 | if (fd >= 0) | |
625 | { | |
626 | /* We succeeded; return this descriptor and filename. */ | |
627 | if (storeptr) | |
628 | *storeptr = build_string (fn); | |
5ef2a3c0 KH |
629 | UNGCPRO; |
630 | return fd; | |
078e7b4a JB |
631 | } |
632 | } | |
633 | ||
634 | /* Advance to next suffix. */ | |
635 | if (esuffix == 0) | |
636 | break; | |
637 | nsuffix += lsuffix + 1; | |
638 | } | |
5a6e5452 | 639 | if (absolute) |
5ef2a3c0 | 640 | break; |
078e7b4a JB |
641 | } |
642 | ||
5ef2a3c0 KH |
643 | UNGCPRO; |
644 | return -1; | |
078e7b4a JB |
645 | } |
646 | ||
647 | \f | |
ae321d28 RS |
648 | /* Merge the list we've accumulated of globals from the current input source |
649 | into the load_history variable. The details depend on whether | |
650 | the source has an associated file name or not. */ | |
651 | ||
652 | static void | |
653 | build_load_history (stream, source) | |
654 | FILE *stream; | |
655 | Lisp_Object source; | |
656 | { | |
657 | register Lisp_Object tail, prev, newelt; | |
658 | register Lisp_Object tem, tem2; | |
659 | register int foundit, loading; | |
660 | ||
8a1f1537 RS |
661 | /* Don't bother recording anything for preloaded files. */ |
662 | if (!NILP (Vpurify_flag)) | |
663 | return; | |
664 | ||
ae321d28 RS |
665 | loading = stream || !NARROWED; |
666 | ||
667 | tail = Vload_history; | |
668 | prev = Qnil; | |
669 | foundit = 0; | |
670 | while (!NILP (tail)) | |
671 | { | |
672 | tem = Fcar (tail); | |
673 | ||
674 | /* Find the feature's previous assoc list... */ | |
675 | if (!NILP (Fequal (source, Fcar (tem)))) | |
676 | { | |
677 | foundit = 1; | |
678 | ||
679 | /* If we're loading, remove it. */ | |
680 | if (loading) | |
681 | { | |
682 | if (NILP (prev)) | |
683 | Vload_history = Fcdr (tail); | |
684 | else | |
685 | Fsetcdr (prev, Fcdr (tail)); | |
686 | } | |
687 | ||
688 | /* Otherwise, cons on new symbols that are not already members. */ | |
689 | else | |
690 | { | |
691 | tem2 = Vcurrent_load_list; | |
692 | ||
693 | while (CONSP (tem2)) | |
694 | { | |
695 | newelt = Fcar (tem2); | |
696 | ||
697 | if (NILP (Fmemq (newelt, tem))) | |
698 | Fsetcar (tail, Fcons (Fcar (tem), | |
699 | Fcons (newelt, Fcdr (tem)))); | |
700 | ||
701 | tem2 = Fcdr (tem2); | |
702 | QUIT; | |
703 | } | |
704 | } | |
705 | } | |
706 | else | |
707 | prev = tail; | |
708 | tail = Fcdr (tail); | |
709 | QUIT; | |
710 | } | |
711 | ||
8a1f1537 RS |
712 | /* If we're loading, cons the new assoc onto the front of load-history, |
713 | the most-recently-loaded position. Also do this if we didn't find | |
714 | an existing member for the current source. */ | |
715 | if (loading || !foundit) | |
716 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
717 | Vload_history); | |
ae321d28 RS |
718 | } |
719 | ||
078e7b4a JB |
720 | Lisp_Object |
721 | unreadpure () /* Used as unwind-protect function in readevalloop */ | |
722 | { | |
723 | read_pure = 0; | |
724 | return Qnil; | |
725 | } | |
726 | ||
727 | static void | |
ae321d28 | 728 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag) |
078e7b4a | 729 | Lisp_Object readcharfun; |
ae321d28 RS |
730 | FILE *stream; |
731 | Lisp_Object sourcename; | |
078e7b4a JB |
732 | Lisp_Object (*evalfun) (); |
733 | int printflag; | |
734 | { | |
735 | register int c; | |
736 | register Lisp_Object val; | |
737 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 738 | struct gcpro gcpro1; |
49cf7ff4 RS |
739 | struct buffer *b = 0; |
740 | ||
741 | if (BUFFERP (readcharfun)) | |
742 | b = XBUFFER (readcharfun); | |
743 | else if (MARKERP (readcharfun)) | |
744 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
745 | |
746 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 747 | specbind (Qcurrent_load_list, Qnil); |
078e7b4a | 748 | |
8a1f1537 | 749 | GCPRO1 (sourcename); |
ae321d28 | 750 | |
ae321d28 RS |
751 | LOADHIST_ATTACH (sourcename); |
752 | ||
078e7b4a JB |
753 | while (1) |
754 | { | |
49cf7ff4 RS |
755 | if (b != 0 && NILP (b->name)) |
756 | error ("Reading from killed buffer"); | |
757 | ||
078e7b4a JB |
758 | instream = stream; |
759 | c = READCHAR; | |
760 | if (c == ';') | |
761 | { | |
762 | while ((c = READCHAR) != '\n' && c != -1); | |
763 | continue; | |
764 | } | |
765 | if (c < 0) break; | |
6069d957 RS |
766 | |
767 | /* Ignore whitespace here, so we can detect eof. */ | |
768 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
769 | continue; | |
078e7b4a | 770 | |
265a9e55 | 771 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 772 | { |
0e326373 | 773 | int count1 = specpdl_ptr - specpdl; |
078e7b4a JB |
774 | record_unwind_protect (unreadpure, Qnil); |
775 | val = read_list (-1, readcharfun); | |
0e326373 | 776 | unbind_to (count1, Qnil); |
078e7b4a JB |
777 | } |
778 | else | |
779 | { | |
780 | UNREAD (c); | |
84a15045 RS |
781 | if (NILP (Vload_read_function)) |
782 | val = read0 (readcharfun); | |
783 | else | |
784 | val = call1 (Vload_read_function, readcharfun); | |
078e7b4a JB |
785 | } |
786 | ||
787 | val = (*evalfun) (val); | |
788 | if (printflag) | |
789 | { | |
790 | Vvalues = Fcons (val, Vvalues); | |
791 | if (EQ (Vstandard_output, Qt)) | |
792 | Fprin1 (val, Qnil); | |
793 | else | |
794 | Fprint (val, Qnil); | |
795 | } | |
796 | } | |
797 | ||
ae321d28 | 798 | build_load_history (stream, sourcename); |
ae321d28 RS |
799 | UNGCPRO; |
800 | ||
078e7b4a JB |
801 | unbind_to (count, Qnil); |
802 | } | |
803 | ||
804 | #ifndef standalone | |
805 | ||
e5d77022 | 806 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 2, "", |
94b304d7 RS |
807 | "Execute the current buffer as Lisp code.\n\ |
808 | Programs can pass two arguments, BUFFER and PRINTFLAG.\n\ | |
809 | BUFFER is the buffer to evaluate (nil means use current buffer).\n\ | |
810 | PRINTFLAG controls printing of output:\n\ | |
228d4b1c JA |
811 | nil means discard it; anything else is stream for print.\n\ |
812 | \n\ | |
813 | If there is no error, point does not move. If there is an error,\n\ | |
814 | point remains at the end of the last character read from the buffer.") | |
9391b698 EN |
815 | (buffer, printflag) |
816 | Lisp_Object buffer, printflag; | |
228d4b1c JA |
817 | { |
818 | int count = specpdl_ptr - specpdl; | |
819 | Lisp_Object tem, buf; | |
820 | ||
9391b698 | 821 | if (NILP (buffer)) |
228d4b1c JA |
822 | buf = Fcurrent_buffer (); |
823 | else | |
9391b698 | 824 | buf = Fget_buffer (buffer); |
dfdb645c | 825 | if (NILP (buf)) |
228d4b1c JA |
826 | error ("No such buffer."); |
827 | ||
dfdb645c | 828 | if (NILP (printflag)) |
228d4b1c JA |
829 | tem = Qsymbolp; |
830 | else | |
831 | tem = printflag; | |
832 | specbind (Qstandard_output, tem); | |
833 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
834 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
ae321d28 | 835 | readevalloop (buf, 0, XBUFFER (buf)->filename, Feval, !NILP (printflag)); |
cb09ab7a | 836 | unbind_to (count, Qnil); |
228d4b1c JA |
837 | |
838 | return Qnil; | |
839 | } | |
840 | ||
841 | #if 0 | |
078e7b4a JB |
842 | DEFUN ("eval-current-buffer", Feval_current_buffer, Seval_current_buffer, 0, 1, "", |
843 | "Execute the current buffer as Lisp code.\n\ | |
844 | Programs can pass argument PRINTFLAG which controls printing of output:\n\ | |
845 | nil means discard it; anything else is stream for print.\n\ | |
846 | \n\ | |
847 | If there is no error, point does not move. If there is an error,\n\ | |
848 | point remains at the end of the last character read from the buffer.") | |
849 | (printflag) | |
850 | Lisp_Object printflag; | |
851 | { | |
852 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
853 | Lisp_Object tem, cbuf; |
854 | ||
855 | cbuf = Fcurrent_buffer () | |
078e7b4a | 856 | |
265a9e55 | 857 | if (NILP (printflag)) |
078e7b4a JB |
858 | tem = Qsymbolp; |
859 | else | |
860 | tem = printflag; | |
861 | specbind (Qstandard_output, tem); | |
862 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
863 | SET_PT (BEGV); | |
ae321d28 | 864 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
865 | return unbind_to (count, Qnil); |
866 | } | |
228d4b1c | 867 | #endif |
078e7b4a JB |
868 | |
869 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 3, "r", | |
870 | "Execute the region as Lisp code.\n\ | |
871 | When called from programs, expects two arguments,\n\ | |
872 | giving starting and ending indices in the current buffer\n\ | |
873 | of the text to be executed.\n\ | |
874 | Programs can pass third argument PRINTFLAG which controls output:\n\ | |
875 | nil means discard it; anything else is stream for printing it.\n\ | |
876 | \n\ | |
877 | If there is no error, point does not move. If there is an error,\n\ | |
878 | point remains at the end of the last character read from the buffer.") | |
9391b698 EN |
879 | (start, end, printflag) |
880 | Lisp_Object start, end, printflag; | |
078e7b4a JB |
881 | { |
882 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
883 | Lisp_Object tem, cbuf; |
884 | ||
885 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 886 | |
265a9e55 | 887 | if (NILP (printflag)) |
078e7b4a JB |
888 | tem = Qsymbolp; |
889 | else | |
890 | tem = printflag; | |
891 | specbind (Qstandard_output, tem); | |
892 | ||
265a9e55 | 893 | if (NILP (printflag)) |
078e7b4a JB |
894 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
895 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
896 | ||
9391b698 EN |
897 | /* This both uses start and checks its type. */ |
898 | Fgoto_char (start); | |
899 | Fnarrow_to_region (make_number (BEGV), end); | |
ae321d28 | 900 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, !NILP (printflag)); |
078e7b4a JB |
901 | |
902 | return unbind_to (count, Qnil); | |
903 | } | |
904 | ||
905 | #endif /* standalone */ | |
906 | \f | |
907 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
908 | "Read one Lisp expression as text from STREAM, return as Lisp object.\n\ | |
909 | If STREAM is nil, use the value of `standard-input' (which see).\n\ | |
910 | STREAM or the value of `standard-input' may be:\n\ | |
911 | a buffer (read from point and advance it)\n\ | |
912 | a marker (read from where it points and advance it)\n\ | |
913 | a function (call it with no arguments for each character,\n\ | |
914 | call it with a char as argument to push a char back)\n\ | |
915 | a string (takes text from string, starting at the beginning)\n\ | |
916 | t (read text line using minibuffer and use it).") | |
5be02dff KH |
917 | (stream) |
918 | Lisp_Object stream; | |
078e7b4a JB |
919 | { |
920 | extern Lisp_Object Fread_minibuffer (); | |
921 | ||
5be02dff KH |
922 | if (NILP (stream)) |
923 | stream = Vstandard_input; | |
924 | if (EQ (stream, Qt)) | |
925 | stream = Qread_char; | |
078e7b4a | 926 | |
17634846 RS |
927 | new_backquote_flag = 0; |
928 | ||
078e7b4a | 929 | #ifndef standalone |
5be02dff | 930 | if (EQ (stream, Qread_char)) |
078e7b4a JB |
931 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
932 | #endif | |
933 | ||
5be02dff KH |
934 | if (STRINGP (stream)) |
935 | return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
078e7b4a | 936 | |
5be02dff | 937 | return read0 (stream); |
078e7b4a JB |
938 | } |
939 | ||
940 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
941 | "Read one Lisp expression which is represented as text by STRING.\n\ | |
942 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\ | |
943 | START and END optionally delimit a substring of STRING from which to read;\n\ | |
944 | they default to 0 and (length STRING) respectively.") | |
945 | (string, start, end) | |
946 | Lisp_Object string, start, end; | |
947 | { | |
948 | int startval, endval; | |
949 | Lisp_Object tem; | |
950 | ||
951 | CHECK_STRING (string,0); | |
952 | ||
265a9e55 | 953 | if (NILP (end)) |
078e7b4a JB |
954 | endval = XSTRING (string)->size; |
955 | else | |
956 | { CHECK_NUMBER (end,2); | |
957 | endval = XINT (end); | |
958 | if (endval < 0 || endval > XSTRING (string)->size) | |
959 | args_out_of_range (string, end); | |
960 | } | |
961 | ||
265a9e55 | 962 | if (NILP (start)) |
078e7b4a JB |
963 | startval = 0; |
964 | else | |
965 | { CHECK_NUMBER (start,1); | |
966 | startval = XINT (start); | |
967 | if (startval < 0 || startval > endval) | |
968 | args_out_of_range (string, start); | |
969 | } | |
970 | ||
971 | read_from_string_index = startval; | |
972 | read_from_string_limit = endval; | |
973 | ||
17634846 RS |
974 | new_backquote_flag = 0; |
975 | ||
078e7b4a JB |
976 | tem = read0 (string); |
977 | return Fcons (tem, make_number (read_from_string_index)); | |
978 | } | |
979 | \f | |
6428369f KH |
980 | /* Use this for recursive reads, in contexts where internal tokens |
981 | are not allowed. */ | |
078e7b4a JB |
982 | static Lisp_Object |
983 | read0 (readcharfun) | |
984 | Lisp_Object readcharfun; | |
985 | { | |
986 | register Lisp_Object val; | |
987 | char c; | |
988 | ||
17634846 | 989 | val = read1 (readcharfun, &c, 0); |
6428369f KH |
990 | if (c) |
991 | Fsignal (Qinvalid_read_syntax, Fcons (make_string (&c, 1), Qnil)); | |
078e7b4a JB |
992 | |
993 | return val; | |
994 | } | |
995 | \f | |
996 | static int read_buffer_size; | |
997 | static char *read_buffer; | |
998 | ||
999 | static int | |
1000 | read_escape (readcharfun) | |
1001 | Lisp_Object readcharfun; | |
1002 | { | |
1003 | register int c = READCHAR; | |
1004 | switch (c) | |
1005 | { | |
1006 | case 'a': | |
265a9e55 | 1007 | return '\007'; |
078e7b4a JB |
1008 | case 'b': |
1009 | return '\b'; | |
f405a585 RS |
1010 | case 'd': |
1011 | return 0177; | |
078e7b4a JB |
1012 | case 'e': |
1013 | return 033; | |
1014 | case 'f': | |
1015 | return '\f'; | |
1016 | case 'n': | |
1017 | return '\n'; | |
1018 | case 'r': | |
1019 | return '\r'; | |
1020 | case 't': | |
1021 | return '\t'; | |
1022 | case 'v': | |
1023 | return '\v'; | |
1024 | case '\n': | |
1025 | return -1; | |
1026 | ||
1027 | case 'M': | |
1028 | c = READCHAR; | |
1029 | if (c != '-') | |
1030 | error ("Invalid escape character syntax"); | |
1031 | c = READCHAR; | |
1032 | if (c == '\\') | |
1033 | c = read_escape (readcharfun); | |
7bd279cd | 1034 | return c | meta_modifier; |
f405a585 RS |
1035 | |
1036 | case 'S': | |
1037 | c = READCHAR; | |
1038 | if (c != '-') | |
1039 | error ("Invalid escape character syntax"); | |
1040 | c = READCHAR; | |
1041 | if (c == '\\') | |
1042 | c = read_escape (readcharfun); | |
7bd279cd RS |
1043 | return c | shift_modifier; |
1044 | ||
1045 | case 'H': | |
1046 | c = READCHAR; | |
1047 | if (c != '-') | |
1048 | error ("Invalid escape character syntax"); | |
1049 | c = READCHAR; | |
1050 | if (c == '\\') | |
1051 | c = read_escape (readcharfun); | |
1052 | return c | hyper_modifier; | |
1053 | ||
1054 | case 'A': | |
1055 | c = READCHAR; | |
1056 | if (c != '-') | |
1057 | error ("Invalid escape character syntax"); | |
1058 | c = READCHAR; | |
1059 | if (c == '\\') | |
1060 | c = read_escape (readcharfun); | |
1061 | return c | alt_modifier; | |
1062 | ||
1063 | case 's': | |
1064 | c = READCHAR; | |
1065 | if (c != '-') | |
1066 | error ("Invalid escape character syntax"); | |
1067 | c = READCHAR; | |
1068 | if (c == '\\') | |
1069 | c = read_escape (readcharfun); | |
1070 | return c | super_modifier; | |
078e7b4a JB |
1071 | |
1072 | case 'C': | |
1073 | c = READCHAR; | |
1074 | if (c != '-') | |
1075 | error ("Invalid escape character syntax"); | |
1076 | case '^': | |
1077 | c = READCHAR; | |
1078 | if (c == '\\') | |
1079 | c = read_escape (readcharfun); | |
f405a585 RS |
1080 | if ((c & 0177) == '?') |
1081 | return 0177 | c; | |
1082 | /* ASCII control chars are made from letters (both cases), | |
1083 | as well as the non-letters within 0100...0137. */ | |
1084 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1085 | return (c & (037 | ~0177)); | |
1086 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1087 | return (c & (037 | ~0177)); | |
078e7b4a | 1088 | else |
7bd279cd | 1089 | return c | ctrl_modifier; |
078e7b4a JB |
1090 | |
1091 | case '0': | |
1092 | case '1': | |
1093 | case '2': | |
1094 | case '3': | |
1095 | case '4': | |
1096 | case '5': | |
1097 | case '6': | |
1098 | case '7': | |
1099 | /* An octal escape, as in ANSI C. */ | |
1100 | { | |
1101 | register int i = c - '0'; | |
1102 | register int count = 0; | |
1103 | while (++count < 3) | |
1104 | { | |
1105 | if ((c = READCHAR) >= '0' && c <= '7') | |
1106 | { | |
1107 | i *= 8; | |
1108 | i += c - '0'; | |
1109 | } | |
1110 | else | |
1111 | { | |
1112 | UNREAD (c); | |
1113 | break; | |
1114 | } | |
1115 | } | |
1116 | return i; | |
1117 | } | |
1118 | ||
1119 | case 'x': | |
1120 | /* A hex escape, as in ANSI C. */ | |
1121 | { | |
1122 | int i = 0; | |
1123 | while (1) | |
1124 | { | |
1125 | c = READCHAR; | |
1126 | if (c >= '0' && c <= '9') | |
1127 | { | |
1128 | i *= 16; | |
1129 | i += c - '0'; | |
1130 | } | |
1131 | else if ((c >= 'a' && c <= 'f') | |
1132 | || (c >= 'A' && c <= 'F')) | |
1133 | { | |
1134 | i *= 16; | |
1135 | if (c >= 'a' && c <= 'f') | |
1136 | i += c - 'a' + 10; | |
1137 | else | |
1138 | i += c - 'A' + 10; | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | UNREAD (c); | |
1143 | break; | |
1144 | } | |
1145 | } | |
1146 | return i; | |
1147 | } | |
1148 | ||
1149 | default: | |
1150 | return c; | |
1151 | } | |
1152 | } | |
1153 | ||
6428369f KH |
1154 | /* If the next token is ')' or ']' or '.', we store that character |
1155 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
1156 | zero in *PCH and we read and return one lisp object. |
1157 | ||
1158 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
1159 | ||
078e7b4a | 1160 | static Lisp_Object |
17634846 | 1161 | read1 (readcharfun, pch, first_in_list) |
078e7b4a | 1162 | register Lisp_Object readcharfun; |
6428369f | 1163 | char *pch; |
17634846 | 1164 | int first_in_list; |
078e7b4a JB |
1165 | { |
1166 | register int c; | |
6428369f | 1167 | *pch = 0; |
078e7b4a JB |
1168 | |
1169 | retry: | |
1170 | ||
1171 | c = READCHAR; | |
1172 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1173 | ||
1174 | switch (c) | |
1175 | { | |
1176 | case '(': | |
1177 | return read_list (0, readcharfun); | |
1178 | ||
1179 | case '[': | |
1180 | return read_vector (readcharfun); | |
1181 | ||
1182 | case ')': | |
1183 | case ']': | |
078e7b4a | 1184 | { |
6428369f KH |
1185 | *pch = c; |
1186 | return Qnil; | |
078e7b4a JB |
1187 | } |
1188 | ||
1189 | case '#': | |
200f684e | 1190 | c = READCHAR; |
c2390933 RS |
1191 | if (c == '^') |
1192 | { | |
1193 | c = READCHAR; | |
1194 | if (c == '[') | |
1195 | { | |
1196 | Lisp_Object tmp; | |
1197 | tmp = read_vector (readcharfun); | |
1198 | if (XVECTOR (tmp)->size < CHAR_TABLE_STANDARD_SLOTS | |
1199 | || XVECTOR (tmp)->size > CHAR_TABLE_STANDARD_SLOTS + 10) | |
1200 | error ("Invalid size char-table"); | |
1201 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); | |
1202 | return tmp; | |
1203 | } | |
1204 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#^", 2), Qnil)); | |
1205 | } | |
1206 | if (c == '&') | |
1207 | { | |
1208 | Lisp_Object length; | |
1209 | length = read1 (readcharfun, pch, first_in_list); | |
1210 | c = READCHAR; | |
1211 | if (c == '"') | |
1212 | { | |
1213 | Lisp_Object tmp, val; | |
68be917d KH |
1214 | int size_in_chars = ((XFASTINT (length) + BITS_PER_CHAR) |
1215 | / BITS_PER_CHAR); | |
c2390933 RS |
1216 | |
1217 | UNREAD (c); | |
1218 | tmp = read1 (readcharfun, pch, first_in_list); | |
1219 | if (size_in_chars != XSTRING (tmp)->size) | |
1220 | Fsignal (Qinvalid_read_syntax, | |
1221 | Fcons (make_string ("#&", 2), Qnil)); | |
1222 | ||
1223 | val = Fmake_bool_vector (length, Qnil); | |
1224 | bcopy (XSTRING (tmp)->data, XBOOL_VECTOR (val)->data, | |
1225 | size_in_chars); | |
1226 | return val; | |
1227 | } | |
1228 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#&", 2), Qnil)); | |
1229 | } | |
200f684e RS |
1230 | if (c == '[') |
1231 | { | |
1232 | /* Accept compiled functions at read-time so that we don't have to | |
1233 | build them using function calls. */ | |
748ef62f RS |
1234 | Lisp_Object tmp; |
1235 | tmp = read_vector (readcharfun); | |
1236 | return Fmake_byte_code (XVECTOR (tmp)->size, | |
1237 | XVECTOR (tmp)->contents); | |
200f684e | 1238 | } |
748ef62f RS |
1239 | #ifdef USE_TEXT_PROPERTIES |
1240 | if (c == '(') | |
1241 | { | |
1242 | Lisp_Object tmp; | |
1243 | struct gcpro gcpro1; | |
6428369f | 1244 | char ch; |
748ef62f RS |
1245 | |
1246 | /* Read the string itself. */ | |
17634846 | 1247 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 1248 | if (ch != 0 || !STRINGP (tmp)) |
748ef62f RS |
1249 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
1250 | GCPRO1 (tmp); | |
1251 | /* Read the intervals and their properties. */ | |
1252 | while (1) | |
1253 | { | |
1254 | Lisp_Object beg, end, plist; | |
1255 | ||
17634846 | 1256 | beg = read1 (readcharfun, &ch, 0); |
6428369f KH |
1257 | if (ch == ')') |
1258 | break; | |
1259 | if (ch == 0) | |
17634846 | 1260 | end = read1 (readcharfun, &ch, 0); |
6428369f | 1261 | if (ch == 0) |
17634846 | 1262 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 1263 | if (ch) |
748ef62f | 1264 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
1265 | Fcons (build_string ("invalid string property list"), |
1266 | Qnil)); | |
748ef62f RS |
1267 | Fset_text_properties (beg, end, plist, tmp); |
1268 | } | |
1269 | UNGCPRO; | |
1270 | return tmp; | |
1271 | } | |
1272 | #endif | |
20ea2964 RS |
1273 | /* #@NUMBER is used to skip NUMBER following characters. |
1274 | That's used in .elc files to skip over doc strings | |
1275 | and function definitions. */ | |
1276 | if (c == '@') | |
1277 | { | |
1278 | int i, nskip = 0; | |
1279 | ||
1280 | /* Read a decimal integer. */ | |
1281 | while ((c = READCHAR) >= 0 | |
1282 | && c >= '0' && c <= '9') | |
1283 | { | |
1284 | nskip *= 10; | |
1285 | nskip += c - '0'; | |
1286 | } | |
1287 | if (c >= 0) | |
1288 | UNREAD (c); | |
1289 | ||
b2a30870 RS |
1290 | #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */ |
1291 | if (load_force_doc_strings && EQ (readcharfun, Qget_file_char)) | |
1292 | { | |
1293 | /* If we are supposed to force doc strings into core right now, | |
1294 | record the last string that we skipped, | |
1295 | and record where in the file it comes from. */ | |
1296 | if (saved_doc_string_size == 0) | |
1297 | { | |
1298 | saved_doc_string_size = nskip + 100; | |
11938f10 | 1299 | saved_doc_string = (char *) xmalloc (saved_doc_string_size); |
b2a30870 RS |
1300 | } |
1301 | if (nskip > saved_doc_string_size) | |
1302 | { | |
1303 | saved_doc_string_size = nskip + 100; | |
11938f10 KH |
1304 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
1305 | saved_doc_string_size); | |
b2a30870 RS |
1306 | } |
1307 | ||
1308 | saved_doc_string_position = ftell (instream); | |
1309 | ||
1310 | /* Copy that many characters into saved_doc_string. */ | |
1311 | for (i = 0; i < nskip && c >= 0; i++) | |
1312 | saved_doc_string[i] = c = READCHAR; | |
1313 | ||
1314 | saved_doc_string_length = i; | |
1315 | } | |
1316 | else | |
1317 | #endif /* not DOS_NT */ | |
1318 | { | |
1319 | /* Skip that many characters. */ | |
1320 | for (i = 0; i < nskip && c >= 0; i++) | |
1321 | c = READCHAR; | |
1322 | } | |
20ea2964 RS |
1323 | goto retry; |
1324 | } | |
1325 | if (c == '$') | |
1326 | return Vload_file_name; | |
2b6cae0c RS |
1327 | if (c == '\'') |
1328 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
1329 | ||
20ea2964 | 1330 | |
200f684e | 1331 | UNREAD (c); |
748ef62f | 1332 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
1333 | |
1334 | case ';': | |
1335 | while ((c = READCHAR) >= 0 && c != '\n'); | |
1336 | goto retry; | |
1337 | ||
1338 | case '\'': | |
1339 | { | |
1340 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
1341 | } | |
1342 | ||
17634846 RS |
1343 | case '`': |
1344 | if (first_in_list) | |
1345 | goto default_label; | |
1346 | else | |
1347 | { | |
1348 | Lisp_Object value; | |
1349 | ||
1350 | new_backquote_flag = 1; | |
1351 | value = read0 (readcharfun); | |
1352 | new_backquote_flag = 0; | |
1353 | ||
1354 | return Fcons (Qbackquote, Fcons (value, Qnil)); | |
1355 | } | |
1356 | ||
1357 | case ',': | |
1358 | if (new_backquote_flag) | |
1359 | { | |
1360 | Lisp_Object comma_type = Qnil; | |
1361 | Lisp_Object value; | |
1362 | int ch = READCHAR; | |
1363 | ||
1364 | if (ch == '@') | |
1365 | comma_type = Qcomma_at; | |
1366 | else if (ch == '.') | |
1367 | comma_type = Qcomma_dot; | |
1368 | else | |
1369 | { | |
1370 | if (ch >= 0) UNREAD (ch); | |
1371 | comma_type = Qcomma; | |
1372 | } | |
1373 | ||
1374 | new_backquote_flag = 0; | |
1375 | value = read0 (readcharfun); | |
1376 | new_backquote_flag = 1; | |
1377 | return Fcons (comma_type, Fcons (value, Qnil)); | |
1378 | } | |
1379 | else | |
1380 | goto default_label; | |
1381 | ||
078e7b4a JB |
1382 | case '?': |
1383 | { | |
1384 | register Lisp_Object val; | |
1385 | ||
1386 | c = READCHAR; | |
1387 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1388 | ||
1389 | if (c == '\\') | |
1805de4f | 1390 | XSETINT (val, read_escape (readcharfun)); |
078e7b4a | 1391 | else |
1805de4f | 1392 | XSETINT (val, c); |
078e7b4a JB |
1393 | |
1394 | return val; | |
1395 | } | |
1396 | ||
1397 | case '\"': | |
1398 | { | |
1399 | register char *p = read_buffer; | |
1400 | register char *end = read_buffer + read_buffer_size; | |
1401 | register int c; | |
1402 | int cancel = 0; | |
1403 | ||
1404 | while ((c = READCHAR) >= 0 | |
1405 | && c != '\"') | |
1406 | { | |
1407 | if (p == end) | |
1408 | { | |
1409 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1410 | p += new - read_buffer; | |
1411 | read_buffer += new - read_buffer; | |
1412 | end = read_buffer + read_buffer_size; | |
1413 | } | |
1414 | if (c == '\\') | |
1415 | c = read_escape (readcharfun); | |
1416 | /* c is -1 if \ newline has just been seen */ | |
f405a585 | 1417 | if (c == -1) |
078e7b4a JB |
1418 | { |
1419 | if (p == read_buffer) | |
1420 | cancel = 1; | |
1421 | } | |
1422 | else | |
f943104a | 1423 | { |
988c2f83 RS |
1424 | /* Allow `\C- ' and `\C-?'. */ |
1425 | if (c == (CHAR_CTL | ' ')) | |
1426 | c = 0; | |
1427 | else if (c == (CHAR_CTL | '?')) | |
1428 | c = 127; | |
1429 | ||
f943104a KH |
1430 | if (c & CHAR_META) |
1431 | /* Move the meta bit to the right place for a string. */ | |
1432 | c = (c & ~CHAR_META) | 0x80; | |
1433 | if (c & ~0xff) | |
1434 | error ("Invalid modifier in string"); | |
1435 | *p++ = c; | |
1436 | } | |
078e7b4a JB |
1437 | } |
1438 | if (c < 0) return Fsignal (Qend_of_file, Qnil); | |
1439 | ||
1440 | /* If purifying, and string starts with \ newline, | |
1441 | return zero instead. This is for doc strings | |
08564963 | 1442 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 1443 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
1444 | return make_number (0); |
1445 | ||
1446 | if (read_pure) | |
1447 | return make_pure_string (read_buffer, p - read_buffer); | |
1448 | else | |
1449 | return make_string (read_buffer, p - read_buffer); | |
1450 | } | |
1451 | ||
109d300c JB |
1452 | case '.': |
1453 | { | |
1454 | #ifdef LISP_FLOAT_TYPE | |
1455 | /* If a period is followed by a number, then we should read it | |
1456 | as a floating point number. Otherwise, it denotes a dotted | |
1457 | pair. */ | |
1458 | int next_char = READCHAR; | |
1459 | UNREAD (next_char); | |
1460 | ||
075027b1 | 1461 | if (! (next_char >= '0' && next_char <= '9')) |
109d300c JB |
1462 | #endif |
1463 | { | |
6428369f KH |
1464 | *pch = c; |
1465 | return Qnil; | |
109d300c JB |
1466 | } |
1467 | ||
1468 | /* Otherwise, we fall through! Note that the atom-reading loop | |
1469 | below will now loop at least once, assuring that we will not | |
1470 | try to UNREAD two characters in a row. */ | |
1471 | } | |
078e7b4a | 1472 | default: |
17634846 | 1473 | default_label: |
078e7b4a JB |
1474 | if (c <= 040) goto retry; |
1475 | { | |
1476 | register char *p = read_buffer; | |
481c6336 | 1477 | int quoted = 0; |
078e7b4a JB |
1478 | |
1479 | { | |
1480 | register char *end = read_buffer + read_buffer_size; | |
1481 | ||
1482 | while (c > 040 && | |
1483 | !(c == '\"' || c == '\'' || c == ';' || c == '?' | |
1484 | || c == '(' || c == ')' | |
109d300c JB |
1485 | #ifndef LISP_FLOAT_TYPE |
1486 | /* If we have floating-point support, then we need | |
1487 | to allow <digits><dot><digits>. */ | |
078e7b4a JB |
1488 | || c =='.' |
1489 | #endif /* not LISP_FLOAT_TYPE */ | |
1490 | || c == '[' || c == ']' || c == '#' | |
1491 | )) | |
1492 | { | |
1493 | if (p == end) | |
1494 | { | |
1495 | register char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1496 | p += new - read_buffer; | |
1497 | read_buffer += new - read_buffer; | |
1498 | end = read_buffer + read_buffer_size; | |
1499 | } | |
1500 | if (c == '\\') | |
481c6336 RS |
1501 | { |
1502 | c = READCHAR; | |
1503 | quoted = 1; | |
1504 | } | |
078e7b4a JB |
1505 | *p++ = c; |
1506 | c = READCHAR; | |
1507 | } | |
1508 | ||
1509 | if (p == end) | |
1510 | { | |
1511 | char *new = (char *) xrealloc (read_buffer, read_buffer_size *= 2); | |
1512 | p += new - read_buffer; | |
1513 | read_buffer += new - read_buffer; | |
1514 | /* end = read_buffer + read_buffer_size; */ | |
1515 | } | |
1516 | *p = 0; | |
1517 | if (c >= 0) | |
1518 | UNREAD (c); | |
1519 | } | |
1520 | ||
481c6336 RS |
1521 | if (!quoted) |
1522 | { | |
1523 | register char *p1; | |
1524 | register Lisp_Object val; | |
1525 | p1 = read_buffer; | |
1526 | if (*p1 == '+' || *p1 == '-') p1++; | |
1527 | /* Is it an integer? */ | |
1528 | if (p1 != p) | |
1529 | { | |
1530 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
dbc4e1c1 | 1531 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1532 | /* Integers can have trailing decimal points. */ |
1533 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
dbc4e1c1 | 1534 | #endif |
481c6336 RS |
1535 | if (p1 == p) |
1536 | /* It is an integer. */ | |
1537 | { | |
dbc4e1c1 | 1538 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1539 | if (p1[-1] == '.') |
1540 | p1[-1] = '\0'; | |
dbc4e1c1 | 1541 | #endif |
faca07fb RS |
1542 | if (sizeof (int) == sizeof (EMACS_INT)) |
1543 | XSETINT (val, atoi (read_buffer)); | |
1544 | else if (sizeof (long) == sizeof (EMACS_INT)) | |
1545 | XSETINT (val, atol (read_buffer)); | |
1546 | else | |
1547 | abort (); | |
481c6336 RS |
1548 | return val; |
1549 | } | |
1550 | } | |
078e7b4a | 1551 | #ifdef LISP_FLOAT_TYPE |
481c6336 RS |
1552 | if (isfloat_string (read_buffer)) |
1553 | return make_float (atof (read_buffer)); | |
078e7b4a | 1554 | #endif |
481c6336 | 1555 | } |
078e7b4a JB |
1556 | |
1557 | return intern (read_buffer); | |
1558 | } | |
1559 | } | |
1560 | } | |
1561 | \f | |
1562 | #ifdef LISP_FLOAT_TYPE | |
1563 | ||
078e7b4a JB |
1564 | #define LEAD_INT 1 |
1565 | #define DOT_CHAR 2 | |
1566 | #define TRAIL_INT 4 | |
1567 | #define E_CHAR 8 | |
1568 | #define EXP_INT 16 | |
1569 | ||
1570 | int | |
1571 | isfloat_string (cp) | |
1572 | register char *cp; | |
1573 | { | |
1574 | register state; | |
1575 | ||
1576 | state = 0; | |
1577 | if (*cp == '+' || *cp == '-') | |
1578 | cp++; | |
1579 | ||
075027b1 | 1580 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1581 | { |
1582 | state |= LEAD_INT; | |
075027b1 RS |
1583 | while (*cp >= '0' && *cp <= '9') |
1584 | cp++; | |
078e7b4a JB |
1585 | } |
1586 | if (*cp == '.') | |
1587 | { | |
1588 | state |= DOT_CHAR; | |
1589 | cp++; | |
1590 | } | |
075027b1 | 1591 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1592 | { |
1593 | state |= TRAIL_INT; | |
075027b1 | 1594 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1595 | cp++; |
1596 | } | |
1597 | if (*cp == 'e') | |
1598 | { | |
1599 | state |= E_CHAR; | |
1600 | cp++; | |
e73997a1 RS |
1601 | if (*cp == '+' || *cp == '-') |
1602 | cp++; | |
078e7b4a | 1603 | } |
078e7b4a | 1604 | |
075027b1 | 1605 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1606 | { |
1607 | state |= EXP_INT; | |
075027b1 | 1608 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
1609 | cp++; |
1610 | } | |
37579d7c | 1611 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
078e7b4a | 1612 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
151bdc83 | 1613 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 1614 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
1615 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
1616 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a JB |
1617 | } |
1618 | #endif /* LISP_FLOAT_TYPE */ | |
1619 | \f | |
1620 | static Lisp_Object | |
1621 | read_vector (readcharfun) | |
1622 | Lisp_Object readcharfun; | |
1623 | { | |
1624 | register int i; | |
1625 | register int size; | |
1626 | register Lisp_Object *ptr; | |
1627 | register Lisp_Object tem, vector; | |
1628 | register struct Lisp_Cons *otem; | |
1629 | Lisp_Object len; | |
1630 | ||
1631 | tem = read_list (1, readcharfun); | |
1632 | len = Flength (tem); | |
1633 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
1634 | ||
1635 | ||
1636 | size = XVECTOR (vector)->size; | |
1637 | ptr = XVECTOR (vector)->contents; | |
1638 | for (i = 0; i < size; i++) | |
1639 | { | |
1640 | ptr[i] = read_pure ? Fpurecopy (Fcar (tem)) : Fcar (tem); | |
1641 | otem = XCONS (tem); | |
1642 | tem = Fcdr (tem); | |
1643 | free_cons (otem); | |
1644 | } | |
1645 | return vector; | |
1646 | } | |
1647 | ||
1648 | /* flag = 1 means check for ] to terminate rather than ) and . | |
1649 | flag = -1 means check for starting with defun | |
1650 | and make structure pure. */ | |
1651 | ||
1652 | static Lisp_Object | |
1653 | read_list (flag, readcharfun) | |
1654 | int flag; | |
1655 | register Lisp_Object readcharfun; | |
1656 | { | |
1657 | /* -1 means check next element for defun, | |
1658 | 0 means don't check, | |
1659 | 1 means already checked and found defun. */ | |
1660 | int defunflag = flag < 0 ? -1 : 0; | |
1661 | Lisp_Object val, tail; | |
1662 | register Lisp_Object elt, tem; | |
1663 | struct gcpro gcpro1, gcpro2; | |
821d417e | 1664 | /* 0 is the normal case. |
b2a30870 RS |
1665 | 1 means this list is a doc reference; replace it with the number 0. |
1666 | 2 means this list is a doc reference; replace it with the doc string. */ | |
821d417e | 1667 | int doc_reference = 0; |
078e7b4a | 1668 | |
17634846 RS |
1669 | /* Initialize this to 1 if we are reading a list. */ |
1670 | int first_in_list = flag <= 0; | |
1671 | ||
078e7b4a JB |
1672 | val = Qnil; |
1673 | tail = Qnil; | |
1674 | ||
1675 | while (1) | |
1676 | { | |
6428369f | 1677 | char ch; |
078e7b4a | 1678 | GCPRO2 (val, tail); |
17634846 | 1679 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 1680 | UNGCPRO; |
20ea2964 | 1681 | |
17634846 RS |
1682 | first_in_list = 0; |
1683 | ||
821d417e | 1684 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 1685 | if (EQ (elt, Vload_file_name) |
821d417e RS |
1686 | && !NILP (Vpurify_flag)) |
1687 | { | |
1688 | if (NILP (Vdoc_file_name)) | |
1689 | /* We have not yet called Snarf-documentation, so assume | |
1690 | this file is described in the DOC-MM.NN file | |
1691 | and Snarf-documentation will fill in the right value later. | |
1692 | For now, replace the whole list with 0. */ | |
1693 | doc_reference = 1; | |
1694 | else | |
1695 | /* We have already called Snarf-documentation, so make a relative | |
1696 | file name for this file, so it can be found properly | |
1697 | in the installed Lisp directory. | |
1698 | We don't use Fexpand_file_name because that would make | |
1699 | the directory absolute now. */ | |
1700 | elt = concat2 (build_string ("../lisp/"), | |
1701 | Ffile_name_nondirectory (elt)); | |
1702 | } | |
b2a30870 RS |
1703 | else if (EQ (elt, Vload_file_name) |
1704 | && load_force_doc_strings) | |
1705 | doc_reference = 2; | |
20ea2964 | 1706 | |
6428369f | 1707 | if (ch) |
078e7b4a JB |
1708 | { |
1709 | if (flag > 0) | |
1710 | { | |
6428369f | 1711 | if (ch == ']') |
078e7b4a | 1712 | return val; |
821d417e RS |
1713 | Fsignal (Qinvalid_read_syntax, |
1714 | Fcons (make_string (") or . in a vector", 18), Qnil)); | |
078e7b4a | 1715 | } |
6428369f | 1716 | if (ch == ')') |
078e7b4a | 1717 | return val; |
6428369f | 1718 | if (ch == '.') |
078e7b4a JB |
1719 | { |
1720 | GCPRO2 (val, tail); | |
265a9e55 | 1721 | if (!NILP (tail)) |
078e7b4a JB |
1722 | XCONS (tail)->cdr = read0 (readcharfun); |
1723 | else | |
1724 | val = read0 (readcharfun); | |
17634846 | 1725 | read1 (readcharfun, &ch, 0); |
078e7b4a | 1726 | UNGCPRO; |
6428369f | 1727 | if (ch == ')') |
821d417e RS |
1728 | { |
1729 | if (doc_reference == 1) | |
1730 | return make_number (0); | |
b2a30870 RS |
1731 | if (doc_reference == 2) |
1732 | { | |
1733 | /* Get a doc string from the file we are loading. | |
1734 | If it's in saved_doc_string, get it from there. */ | |
1735 | int pos = XINT (XCONS (val)->cdr); | |
1736 | if (pos >= saved_doc_string_position | |
1737 | && pos < (saved_doc_string_position | |
1738 | + saved_doc_string_length)) | |
1739 | { | |
1740 | int start = pos - saved_doc_string_position; | |
1741 | int from, to; | |
1742 | ||
1743 | /* Process quoting with ^A, | |
1744 | and find the end of the string, | |
1745 | which is marked with ^_ (037). */ | |
1746 | for (from = start, to = start; | |
1747 | saved_doc_string[from] != 037;) | |
1748 | { | |
1749 | int c = saved_doc_string[from++]; | |
1750 | if (c == 1) | |
1751 | { | |
1752 | c = saved_doc_string[from++]; | |
1753 | if (c == 1) | |
1754 | saved_doc_string[to++] = c; | |
1755 | else if (c == '0') | |
1756 | saved_doc_string[to++] = 0; | |
1757 | else if (c == '_') | |
1758 | saved_doc_string[to++] = 037; | |
1759 | } | |
1760 | else | |
1761 | saved_doc_string[to++] = c; | |
1762 | } | |
1763 | ||
1764 | return make_string (saved_doc_string + start, | |
1765 | to - start); | |
1766 | } | |
1767 | else | |
1768 | return read_doc_string (val); | |
1769 | } | |
1770 | ||
821d417e RS |
1771 | return val; |
1772 | } | |
078e7b4a JB |
1773 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
1774 | } | |
1775 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
1776 | } | |
1777 | tem = (read_pure && flag <= 0 | |
1778 | ? pure_cons (elt, Qnil) | |
1779 | : Fcons (elt, Qnil)); | |
265a9e55 | 1780 | if (!NILP (tail)) |
078e7b4a JB |
1781 | XCONS (tail)->cdr = tem; |
1782 | else | |
1783 | val = tem; | |
1784 | tail = tem; | |
1785 | if (defunflag < 0) | |
1786 | defunflag = EQ (elt, Qdefun); | |
1787 | else if (defunflag > 0) | |
1788 | read_pure = 1; | |
1789 | } | |
1790 | } | |
1791 | \f | |
1792 | Lisp_Object Vobarray; | |
1793 | Lisp_Object initial_obarray; | |
1794 | ||
d007f5c8 RS |
1795 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
1796 | ||
1797 | int oblookup_last_bucket_number; | |
1798 | ||
1799 | static int hash_string (); | |
1800 | Lisp_Object oblookup (); | |
1801 | ||
1802 | /* Get an error if OBARRAY is not an obarray. | |
1803 | If it is one, return it. */ | |
1804 | ||
078e7b4a JB |
1805 | Lisp_Object |
1806 | check_obarray (obarray) | |
1807 | Lisp_Object obarray; | |
1808 | { | |
cfff016d | 1809 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1810 | { |
1811 | /* If Vobarray is now invalid, force it to be valid. */ | |
1812 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
1813 | ||
1814 | obarray = wrong_type_argument (Qvectorp, obarray); | |
1815 | } | |
1816 | return obarray; | |
1817 | } | |
1818 | ||
d007f5c8 RS |
1819 | /* Intern the C string STR: return a symbol with that name, |
1820 | interned in the current obarray. */ | |
078e7b4a JB |
1821 | |
1822 | Lisp_Object | |
1823 | intern (str) | |
1824 | char *str; | |
1825 | { | |
1826 | Lisp_Object tem; | |
1827 | int len = strlen (str); | |
153a17b7 | 1828 | Lisp_Object obarray; |
078e7b4a | 1829 | |
153a17b7 | 1830 | obarray = Vobarray; |
cfff016d | 1831 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
1832 | obarray = check_obarray (obarray); |
1833 | tem = oblookup (obarray, str, len); | |
cfff016d | 1834 | if (SYMBOLP (tem)) |
078e7b4a | 1835 | return tem; |
265a9e55 | 1836 | return Fintern ((!NILP (Vpurify_flag) |
078e7b4a JB |
1837 | ? make_pure_string (str, len) |
1838 | : make_string (str, len)), | |
1839 | obarray); | |
1840 | } | |
d007f5c8 | 1841 | \f |
078e7b4a JB |
1842 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
1843 | "Return the canonical symbol whose name is STRING.\n\ | |
1844 | If there is none, one is created by this function and returned.\n\ | |
1845 | A second optional argument specifies the obarray to use;\n\ | |
1846 | it defaults to the value of `obarray'.") | |
9391b698 EN |
1847 | (string, obarray) |
1848 | Lisp_Object string, obarray; | |
078e7b4a JB |
1849 | { |
1850 | register Lisp_Object tem, sym, *ptr; | |
1851 | ||
265a9e55 | 1852 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1853 | obarray = check_obarray (obarray); |
1854 | ||
9391b698 | 1855 | CHECK_STRING (string, 0); |
078e7b4a | 1856 | |
9391b698 | 1857 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); |
cfff016d | 1858 | if (!INTEGERP (tem)) |
078e7b4a JB |
1859 | return tem; |
1860 | ||
265a9e55 | 1861 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
1862 | string = Fpurecopy (string); |
1863 | sym = Fmake_symbol (string); | |
078e7b4a JB |
1864 | |
1865 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; | |
cfff016d | 1866 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
1867 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
1868 | else | |
1869 | XSYMBOL (sym)->next = 0; | |
1870 | *ptr = sym; | |
1871 | return sym; | |
1872 | } | |
1873 | ||
1874 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
1875 | "Return the canonical symbol whose name is STRING, or nil if none exists.\n\ | |
1876 | A second optional argument specifies the obarray to use;\n\ | |
1877 | it defaults to the value of `obarray'.") | |
9391b698 EN |
1878 | (string, obarray) |
1879 | Lisp_Object string, obarray; | |
078e7b4a JB |
1880 | { |
1881 | register Lisp_Object tem; | |
1882 | ||
265a9e55 | 1883 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
1884 | obarray = check_obarray (obarray); |
1885 | ||
9391b698 | 1886 | CHECK_STRING (string, 0); |
078e7b4a | 1887 | |
9391b698 | 1888 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); |
cfff016d | 1889 | if (!INTEGERP (tem)) |
078e7b4a JB |
1890 | return tem; |
1891 | return Qnil; | |
1892 | } | |
d007f5c8 RS |
1893 | \f |
1894 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, | |
1895 | "Delete the symbol named NAME, if any, from OBARRAY.\n\ | |
1896 | The value is t if a symbol was found and deleted, nil otherwise.\n\ | |
1897 | NAME may be a string or a symbol. If it is a symbol, that symbol\n\ | |
1898 | is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\ | |
1899 | OBARRAY defaults to the value of the variable `obarray'.") | |
1900 | (name, obarray) | |
1901 | Lisp_Object name, obarray; | |
1902 | { | |
1903 | register Lisp_Object string, tem; | |
1904 | int hash; | |
1905 | ||
1906 | if (NILP (obarray)) obarray = Vobarray; | |
1907 | obarray = check_obarray (obarray); | |
1908 | ||
1909 | if (SYMBOLP (name)) | |
1910 | XSETSTRING (string, XSYMBOL (name)->name); | |
1911 | else | |
1912 | { | |
1913 | CHECK_STRING (name, 0); | |
1914 | string = name; | |
1915 | } | |
1916 | ||
1917 | tem = oblookup (obarray, XSTRING (string)->data, XSTRING (string)->size); | |
1918 | if (INTEGERP (tem)) | |
1919 | return Qnil; | |
1920 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
1921 | if (SYMBOLP (name) && !EQ (name, tem)) | |
1922 | return Qnil; | |
1923 | ||
1924 | hash = oblookup_last_bucket_number; | |
1925 | ||
1926 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
1927 | { |
1928 | if (XSYMBOL (tem)->next) | |
1929 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
1930 | else | |
1931 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
1932 | } | |
d007f5c8 RS |
1933 | else |
1934 | { | |
1935 | Lisp_Object tail, following; | |
1936 | ||
1937 | for (tail = XVECTOR (obarray)->contents[hash]; | |
1938 | XSYMBOL (tail)->next; | |
1939 | tail = following) | |
1940 | { | |
1941 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
1942 | if (EQ (following, tem)) | |
1943 | { | |
1944 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
1945 | break; | |
1946 | } | |
1947 | } | |
1948 | } | |
1949 | ||
1950 | return Qt; | |
1951 | } | |
1952 | \f | |
1953 | /* Return the symbol in OBARRAY whose names matches the string | |
1954 | of SIZE characters at PTR. If there is no such symbol in OBARRAY, | |
1955 | return nil. | |
1956 | ||
1957 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
1958 | |
1959 | Lisp_Object | |
a142f21b | 1960 | oblookup (obarray, ptr, size) |
078e7b4a JB |
1961 | Lisp_Object obarray; |
1962 | register char *ptr; | |
1963 | register int size; | |
1964 | { | |
7a70b397 RS |
1965 | int hash; |
1966 | int obsize; | |
078e7b4a JB |
1967 | register Lisp_Object tail; |
1968 | Lisp_Object bucket, tem; | |
1969 | ||
cfff016d | 1970 | if (!VECTORP (obarray) |
7c79a684 | 1971 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
1972 | { |
1973 | obarray = check_obarray (obarray); | |
1974 | obsize = XVECTOR (obarray)->size; | |
1975 | } | |
519418b3 RS |
1976 | /* This is sometimes needed in the middle of GC. */ |
1977 | obsize &= ~ARRAY_MARK_FLAG; | |
078e7b4a JB |
1978 | /* Combining next two lines breaks VMS C 2.3. */ |
1979 | hash = hash_string (ptr, size); | |
1980 | hash %= obsize; | |
1981 | bucket = XVECTOR (obarray)->contents[hash]; | |
d007f5c8 | 1982 | oblookup_last_bucket_number = hash; |
078e7b4a JB |
1983 | if (XFASTINT (bucket) == 0) |
1984 | ; | |
cfff016d | 1985 | else if (!SYMBOLP (bucket)) |
078e7b4a | 1986 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
1987 | else |
1988 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 1989 | { |
d007f5c8 RS |
1990 | if (XSYMBOL (tail)->name->size == size |
1991 | && !bcmp (XSYMBOL (tail)->name->data, ptr, size)) | |
078e7b4a JB |
1992 | return tail; |
1993 | else if (XSYMBOL (tail)->next == 0) | |
1994 | break; | |
1995 | } | |
1805de4f | 1996 | XSETINT (tem, hash); |
078e7b4a JB |
1997 | return tem; |
1998 | } | |
1999 | ||
2000 | static int | |
2001 | hash_string (ptr, len) | |
2002 | unsigned char *ptr; | |
2003 | int len; | |
2004 | { | |
2005 | register unsigned char *p = ptr; | |
2006 | register unsigned char *end = p + len; | |
2007 | register unsigned char c; | |
2008 | register int hash = 0; | |
2009 | ||
2010 | while (p != end) | |
2011 | { | |
2012 | c = *p++; | |
2013 | if (c >= 0140) c -= 40; | |
2014 | hash = ((hash<<3) + (hash>>28) + c); | |
2015 | } | |
2016 | return hash & 07777777777; | |
2017 | } | |
d007f5c8 | 2018 | \f |
078e7b4a JB |
2019 | void |
2020 | map_obarray (obarray, fn, arg) | |
2021 | Lisp_Object obarray; | |
2022 | int (*fn) (); | |
2023 | Lisp_Object arg; | |
2024 | { | |
2025 | register int i; | |
2026 | register Lisp_Object tail; | |
2027 | CHECK_VECTOR (obarray, 1); | |
2028 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) | |
2029 | { | |
2030 | tail = XVECTOR (obarray)->contents[i]; | |
2031 | if (XFASTINT (tail) != 0) | |
2032 | while (1) | |
2033 | { | |
2034 | (*fn) (tail, arg); | |
2035 | if (XSYMBOL (tail)->next == 0) | |
2036 | break; | |
1805de4f | 2037 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
2038 | } |
2039 | } | |
2040 | } | |
2041 | ||
2042 | mapatoms_1 (sym, function) | |
2043 | Lisp_Object sym, function; | |
2044 | { | |
2045 | call1 (function, sym); | |
2046 | } | |
2047 | ||
2048 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
2049 | "Call FUNCTION on every symbol in OBARRAY.\n\ | |
2050 | OBARRAY defaults to the value of `obarray'.") | |
2051 | (function, obarray) | |
2052 | Lisp_Object function, obarray; | |
2053 | { | |
2054 | Lisp_Object tem; | |
2055 | ||
265a9e55 | 2056 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
2057 | obarray = check_obarray (obarray); |
2058 | ||
2059 | map_obarray (obarray, mapatoms_1, function); | |
2060 | return Qnil; | |
2061 | } | |
2062 | ||
5e88a39e | 2063 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
2064 | |
2065 | void | |
2066 | init_obarray () | |
2067 | { | |
2068 | Lisp_Object oblength; | |
2069 | int hash; | |
2070 | Lisp_Object *tem; | |
2071 | ||
baf69866 | 2072 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a JB |
2073 | |
2074 | Qnil = Fmake_symbol (make_pure_string ("nil", 3)); | |
2075 | Vobarray = Fmake_vector (oblength, make_number (0)); | |
2076 | initial_obarray = Vobarray; | |
2077 | staticpro (&initial_obarray); | |
2078 | /* Intern nil in the obarray */ | |
2079 | /* These locals are to kludge around a pyramid compiler bug. */ | |
2080 | hash = hash_string ("nil", 3); | |
2081 | /* Separate statement here to avoid VAXC bug. */ | |
2082 | hash %= OBARRAY_SIZE; | |
2083 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
2084 | *tem = Qnil; | |
2085 | ||
2086 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7)); | |
2087 | XSYMBOL (Qnil)->function = Qunbound; | |
2088 | XSYMBOL (Qunbound)->value = Qunbound; | |
2089 | XSYMBOL (Qunbound)->function = Qunbound; | |
2090 | ||
2091 | Qt = intern ("t"); | |
2092 | XSYMBOL (Qnil)->value = Qnil; | |
2093 | XSYMBOL (Qnil)->plist = Qnil; | |
2094 | XSYMBOL (Qt)->value = Qt; | |
2095 | ||
2096 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
2097 | Vpurify_flag = Qt; | |
2098 | ||
2099 | Qvariable_documentation = intern ("variable-documentation"); | |
2100 | ||
2101 | read_buffer_size = 100; | |
2102 | read_buffer = (char *) malloc (read_buffer_size); | |
2103 | } | |
2104 | \f | |
2105 | void | |
2106 | defsubr (sname) | |
2107 | struct Lisp_Subr *sname; | |
2108 | { | |
2109 | Lisp_Object sym; | |
2110 | sym = intern (sname->symbol_name); | |
1805de4f | 2111 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
2112 | } |
2113 | ||
2114 | #ifdef NOTDEF /* use fset in subr.el now */ | |
2115 | void | |
2116 | defalias (sname, string) | |
2117 | struct Lisp_Subr *sname; | |
2118 | char *string; | |
2119 | { | |
2120 | Lisp_Object sym; | |
2121 | sym = intern (string); | |
1805de4f | 2122 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
2123 | } |
2124 | #endif /* NOTDEF */ | |
2125 | ||
078e7b4a | 2126 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 2127 | to a C variable of type int. Sample call: */ |
950c215d | 2128 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 2129 | void |
e9e00ff2 | 2130 | defvar_int (namestring, address) |
078e7b4a JB |
2131 | char *namestring; |
2132 | int *address; | |
078e7b4a | 2133 | { |
1a0f90f7 | 2134 | Lisp_Object sym, val; |
078e7b4a | 2135 | sym = intern (namestring); |
1a0f90f7 | 2136 | val = allocate_misc (); |
47e28b2c | 2137 | XMISCTYPE (val) = Lisp_Misc_Intfwd; |
fc1e7df5 | 2138 | XINTFWD (val)->intvar = address; |
1a0f90f7 | 2139 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
2140 | } |
2141 | ||
2142 | /* Similar but define a variable whose value is T if address contains 1, | |
1a0f90f7 | 2143 | NIL if address contains 0 */ |
078e7b4a | 2144 | void |
e9e00ff2 | 2145 | defvar_bool (namestring, address) |
078e7b4a JB |
2146 | char *namestring; |
2147 | int *address; | |
078e7b4a | 2148 | { |
1a0f90f7 | 2149 | Lisp_Object sym, val; |
078e7b4a | 2150 | sym = intern (namestring); |
1a0f90f7 | 2151 | val = allocate_misc (); |
47e28b2c | 2152 | XMISCTYPE (val) = Lisp_Misc_Boolfwd; |
fc1e7df5 | 2153 | XBOOLFWD (val)->boolvar = address; |
1a0f90f7 | 2154 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
2155 | } |
2156 | ||
1a0f90f7 KH |
2157 | /* Similar but define a variable whose value is the Lisp Object stored |
2158 | at address. Two versions: with and without gc-marking of the C | |
2159 | variable. The nopro version is used when that variable will be | |
2160 | gc-marked for some other reason, since marking the same slot twice | |
2161 | can cause trouble with strings. */ | |
078e7b4a | 2162 | void |
1a0f90f7 | 2163 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
2164 | char *namestring; |
2165 | Lisp_Object *address; | |
078e7b4a | 2166 | { |
1a0f90f7 | 2167 | Lisp_Object sym, val; |
078e7b4a | 2168 | sym = intern (namestring); |
1a0f90f7 | 2169 | val = allocate_misc (); |
47e28b2c | 2170 | XMISCTYPE (val) = Lisp_Misc_Objfwd; |
fc1e7df5 | 2171 | XOBJFWD (val)->objvar = address; |
1a0f90f7 | 2172 | XSYMBOL (sym)->value = val; |
078e7b4a JB |
2173 | } |
2174 | ||
078e7b4a | 2175 | void |
1a0f90f7 | 2176 | defvar_lisp (namestring, address) |
078e7b4a JB |
2177 | char *namestring; |
2178 | Lisp_Object *address; | |
078e7b4a | 2179 | { |
1a0f90f7 KH |
2180 | defvar_lisp_nopro (namestring, address); |
2181 | staticpro (address); | |
078e7b4a JB |
2182 | } |
2183 | ||
2184 | #ifndef standalone | |
2185 | ||
2186 | /* Similar but define a variable whose value is the Lisp Object stored in | |
2836d9a4 KH |
2187 | the current buffer. address is the address of the slot in the buffer |
2188 | that is current now. */ | |
078e7b4a JB |
2189 | |
2190 | void | |
4360b0c6 | 2191 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
2192 | char *namestring; |
2193 | Lisp_Object *address; | |
4360b0c6 | 2194 | Lisp_Object type; |
078e7b4a JB |
2195 | char *doc; |
2196 | { | |
1a0f90f7 | 2197 | Lisp_Object sym, val; |
078e7b4a JB |
2198 | int offset; |
2199 | extern struct buffer buffer_local_symbols; | |
2200 | ||
2201 | sym = intern (namestring); | |
1a0f90f7 | 2202 | val = allocate_misc (); |
078e7b4a JB |
2203 | offset = (char *)address - (char *)current_buffer; |
2204 | ||
47e28b2c | 2205 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 2206 | XBUFFER_OBJFWD (val)->offset = offset; |
1a0f90f7 | 2207 | XSYMBOL (sym)->value = val; |
078e7b4a | 2208 | *(Lisp_Object *)(offset + (char *)&buffer_local_symbols) = sym; |
4360b0c6 | 2209 | *(Lisp_Object *)(offset + (char *)&buffer_local_types) = type; |
2836d9a4 | 2210 | if (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)) == 0) |
078e7b4a JB |
2211 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
2212 | slot of buffer_local_flags */ | |
2213 | abort (); | |
2214 | } | |
2215 | ||
2216 | #endif /* standalone */ | |
950c215d KH |
2217 | |
2218 | /* Similar but define a variable whose value is the Lisp Object stored | |
4ac38690 | 2219 | at a particular offset in the current kboard object. */ |
950c215d KH |
2220 | |
2221 | void | |
4ac38690 | 2222 | defvar_kboard (namestring, offset) |
950c215d KH |
2223 | char *namestring; |
2224 | int offset; | |
2225 | { | |
2226 | Lisp_Object sym, val; | |
2227 | sym = intern (namestring); | |
2228 | val = allocate_misc (); | |
47e28b2c | 2229 | XMISCTYPE (val) = Lisp_Misc_Kboard_Objfwd; |
4ac38690 | 2230 | XKBOARD_OBJFWD (val)->offset = offset; |
950c215d KH |
2231 | XSYMBOL (sym)->value = val; |
2232 | } | |
078e7b4a | 2233 | \f |
11938f10 KH |
2234 | /* Record the value of load-path used at the start of dumping |
2235 | so we can see if the site changed it later during dumping. */ | |
2236 | static Lisp_Object dump_path; | |
2237 | ||
279499f0 | 2238 | init_lread () |
078e7b4a | 2239 | { |
46947372 | 2240 | char *normal; |
e73997a1 | 2241 | int turn_off_warning = 0; |
078e7b4a | 2242 | |
9dff7c53 RS |
2243 | #ifdef HAVE_SETLOCALE |
2244 | /* Make sure numbers are parsed as we expect. */ | |
2245 | setlocale (LC_NUMERIC, "C"); | |
2246 | #endif /* HAVE_SETLOCALE */ | |
2247 | ||
279499f0 | 2248 | /* Compute the default load-path. */ |
46947372 JB |
2249 | #ifdef CANNOT_DUMP |
2250 | normal = PATH_LOADSEARCH; | |
e065a56e | 2251 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
2252 | #else |
2253 | if (NILP (Vpurify_flag)) | |
2254 | normal = PATH_LOADSEARCH; | |
279499f0 | 2255 | else |
46947372 | 2256 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 2257 | |
46947372 JB |
2258 | /* In a dumped Emacs, we normally have to reset the value of |
2259 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
2260 | uses ../lisp, instead of the path of the installed elisp | |
2261 | libraries. However, if it appears that Vload_path was changed | |
2262 | from the default before dumping, don't override that value. */ | |
4746118a JB |
2263 | if (initialized) |
2264 | { | |
4746118a | 2265 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
2266 | { |
2267 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 2268 | if (!NILP (Vinstallation_directory)) |
80667d53 | 2269 | { |
74180aa4 | 2270 | /* Add to the path the lisp subdir of the |
3a3056e5 RS |
2271 | installation dir, if it exists. */ |
2272 | Lisp_Object tem, tem1; | |
74180aa4 RS |
2273 | tem = Fexpand_file_name (build_string ("lisp"), |
2274 | Vinstallation_directory); | |
3a3056e5 RS |
2275 | tem1 = Ffile_exists_p (tem); |
2276 | if (!NILP (tem1)) | |
2277 | { | |
2278 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
2279 | { |
2280 | turn_off_warning = 1; | |
2281 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
2282 | } | |
3a3056e5 RS |
2283 | } |
2284 | else | |
2285 | /* That dir doesn't exist, so add the build-time | |
2286 | Lisp dirs instead. */ | |
2287 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c RS |
2288 | |
2289 | /* Add site-list under the installation dir, if it exists. */ | |
2290 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
2291 | Vinstallation_directory); | |
2292 | tem1 = Ffile_exists_p (tem); | |
2293 | if (!NILP (tem1)) | |
2294 | { | |
2295 | if (NILP (Fmember (tem, Vload_path))) | |
2296 | Vload_path = nconc2 (Vload_path, Fcons (tem, Qnil)); | |
2297 | } | |
80667d53 RS |
2298 | } |
2299 | } | |
4746118a JB |
2300 | } |
2301 | else | |
11938f10 KH |
2302 | { |
2303 | /* ../lisp refers to the build directory. | |
2304 | NORMAL refers to the lisp dir in the source directory. */ | |
2305 | Vload_path = Fcons (build_string ("../lisp"), | |
2306 | decode_env_path (0, normal)); | |
2307 | dump_path = Vload_path; | |
2308 | } | |
46947372 | 2309 | #endif |
279499f0 | 2310 | |
317073d5 RS |
2311 | #ifndef WINDOWSNT |
2312 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
2313 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 2314 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
317073d5 RS |
2315 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
2316 | ||
078e7b4a | 2317 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
2318 | if (!turn_off_warning) |
2319 | { | |
2320 | Lisp_Object path_tail; | |
078e7b4a | 2321 | |
e73997a1 RS |
2322 | for (path_tail = Vload_path; |
2323 | !NILP (path_tail); | |
2324 | path_tail = XCONS (path_tail)->cdr) | |
2325 | { | |
2326 | Lisp_Object dirfile; | |
2327 | dirfile = Fcar (path_tail); | |
2328 | if (STRINGP (dirfile)) | |
2329 | { | |
2330 | dirfile = Fdirectory_file_name (dirfile); | |
2331 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
2332 | fprintf (stderr, | |
2333 | "Warning: Lisp directory `%s' does not exist.\n", | |
2334 | XSTRING (Fcar (path_tail))->data); | |
2335 | } | |
2336 | } | |
2337 | } | |
317073d5 | 2338 | #endif /* WINDOWSNT */ |
46947372 JB |
2339 | |
2340 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
2341 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 2342 | #ifndef CANNOT_DUMP |
46947372 JB |
2343 | if (NILP (Vpurify_flag) |
2344 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 2345 | #endif |
279499f0 | 2346 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
2347 | |
2348 | Vvalues = Qnil; | |
2349 | ||
078e7b4a | 2350 | load_in_progress = 0; |
d2c6be7f RS |
2351 | |
2352 | load_descriptor_list = Qnil; | |
078e7b4a JB |
2353 | } |
2354 | ||
2355 | void | |
279499f0 | 2356 | syms_of_lread () |
078e7b4a JB |
2357 | { |
2358 | defsubr (&Sread); | |
2359 | defsubr (&Sread_from_string); | |
2360 | defsubr (&Sintern); | |
2361 | defsubr (&Sintern_soft); | |
d007f5c8 | 2362 | defsubr (&Sunintern); |
078e7b4a | 2363 | defsubr (&Sload); |
228d4b1c | 2364 | defsubr (&Seval_buffer); |
078e7b4a JB |
2365 | defsubr (&Seval_region); |
2366 | defsubr (&Sread_char); | |
2367 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 2368 | defsubr (&Sread_event); |
078e7b4a JB |
2369 | defsubr (&Sget_file_char); |
2370 | defsubr (&Smapatoms); | |
2371 | ||
2372 | DEFVAR_LISP ("obarray", &Vobarray, | |
2373 | "Symbol table for use by `intern' and `read'.\n\ | |
2374 | It is a vector whose length ought to be prime for best results.\n\ | |
2375 | The vector's contents don't make sense if examined from Lisp programs;\n\ | |
2376 | to find all the symbols in an obarray, use `mapatoms'."); | |
2377 | ||
2378 | DEFVAR_LISP ("values", &Vvalues, | |
2379 | "List of values of all expressions which were read, evaluated and printed.\n\ | |
2380 | Order is reverse chronological."); | |
2381 | ||
2382 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
2383 | "Stream for read to get input from.\n\ | |
2384 | See documentation of `read' for possible values."); | |
2385 | Vstandard_input = Qt; | |
2386 | ||
2387 | DEFVAR_LISP ("load-path", &Vload_path, | |
2388 | "*List of directories to search for files to load.\n\ | |
2389 | Each element is a string (directory name) or nil (try default directory).\n\ | |
2390 | Initialized based on EMACSLOADPATH environment variable, if any,\n\ | |
692f86ad | 2391 | otherwise to default specified by file `paths.h' when Emacs was built."); |
078e7b4a JB |
2392 | |
2393 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, | |
2394 | "Non-nil iff inside of `load'."); | |
2395 | ||
2396 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
2397 | "An alist of expressions to be evalled when particular files are loaded.\n\ | |
2398 | Each element looks like (FILENAME FORMS...).\n\ | |
2399 | When `load' is run and the file-name argument is FILENAME,\n\ | |
2400 | the FORMS in the corresponding element are executed at the end of loading.\n\n\ | |
2401 | FILENAME must match exactly! Normally FILENAME is the name of a library,\n\ | |
2402 | with no directory specified, since that is how `load' is normally called.\n\ | |
2403 | An error in FORMS does not undo the load,\n\ | |
2404 | but does prevent execution of the rest of the FORMS."); | |
2405 | Vafter_load_alist = Qnil; | |
2406 | ||
ae321d28 RS |
2407 | DEFVAR_LISP ("load-history", &Vload_history, |
2408 | "Alist mapping source file names to symbols and features.\n\ | |
2409 | Each alist element is a list that starts with a file name,\n\ | |
2410 | except for one element (optional) that starts with nil and describes\n\ | |
2411 | definitions evaluated from buffers not visiting files.\n\ | |
2412 | The remaining elements of each list are symbols defined as functions\n\ | |
2413 | or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'."); | |
2414 | Vload_history = Qnil; | |
2415 | ||
20ea2964 RS |
2416 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
2417 | "Full name of file being loaded by `load'."); | |
2418 | Vload_file_name = Qnil; | |
2419 | ||
8a1f1537 RS |
2420 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
2421 | "Used for internal purposes by `load'."); | |
ae321d28 RS |
2422 | Vcurrent_load_list = Qnil; |
2423 | ||
84a15045 RS |
2424 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
2425 | "Function used by `load' and `eval-region' for reading expressions.\n\ | |
2426 | The default is nil, which means use the function `read'."); | |
2427 | Vload_read_function = Qnil; | |
2428 | ||
b2a30870 RS |
2429 | DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings, |
2430 | "Non-nil means `load' should force-load all dynamic doc strings.\n\ | |
2431 | This is useful when the file being loaded is a temporary copy."); | |
2432 | load_force_doc_strings = 0; | |
2433 | ||
1521a8fa RS |
2434 | DEFVAR_LISP ("source-directory", &Vsource_directory, |
2435 | "Directory in which Emacs sources were found when Emacs was built.\n\ | |
2436 | You cannot count on them to still be there!"); | |
a90ba1e2 KH |
2437 | Vsource_directory |
2438 | = Fexpand_file_name (build_string ("../"), | |
2439 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
2440 | ||
2441 | /* Vsource_directory was initialized in init_lread. */ | |
2442 | ||
d2c6be7f RS |
2443 | load_descriptor_list = Qnil; |
2444 | staticpro (&load_descriptor_list); | |
2445 | ||
8a1f1537 RS |
2446 | Qcurrent_load_list = intern ("current-load-list"); |
2447 | staticpro (&Qcurrent_load_list); | |
2448 | ||
078e7b4a JB |
2449 | Qstandard_input = intern ("standard-input"); |
2450 | staticpro (&Qstandard_input); | |
2451 | ||
2452 | Qread_char = intern ("read-char"); | |
2453 | staticpro (&Qread_char); | |
2454 | ||
2455 | Qget_file_char = intern ("get-file-char"); | |
2456 | staticpro (&Qget_file_char); | |
7bd279cd | 2457 | |
17634846 RS |
2458 | Qbackquote = intern ("`"); |
2459 | staticpro (&Qbackquote); | |
2460 | Qcomma = intern (","); | |
2461 | staticpro (&Qcomma); | |
2462 | Qcomma_at = intern (",@"); | |
2463 | staticpro (&Qcomma_at); | |
2464 | Qcomma_dot = intern (",."); | |
2465 | staticpro (&Qcomma_dot); | |
2466 | ||
7bd279cd RS |
2467 | Qascii_character = intern ("ascii-character"); |
2468 | staticpro (&Qascii_character); | |
c2225d00 | 2469 | |
2b6cae0c RS |
2470 | Qfunction = intern ("function"); |
2471 | staticpro (&Qfunction); | |
2472 | ||
c2225d00 RS |
2473 | Qload = intern ("load"); |
2474 | staticpro (&Qload); | |
20ea2964 RS |
2475 | |
2476 | Qload_file_name = intern ("load-file-name"); | |
2477 | staticpro (&Qload_file_name); | |
11938f10 KH |
2478 | |
2479 | staticpro (&dump_path); | |
078e7b4a | 2480 | } |