Commit | Line | Data |
---|---|---|
078e7b4a | 1 | /* Lisp parsing and input streams. |
df6c90d8 | 2 | Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99, 2000, 2001 |
33046fc9 | 3 | 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 | 29 | #include "lisp.h" |
95384e1e | 30 | #include "intervals.h" |
078e7b4a | 31 | #include "buffer.h" |
fe0e03f3 | 32 | #include "charset.h" |
57bda87a | 33 | #include <epaths.h> |
078e7b4a | 34 | #include "commands.h" |
e37c0805 | 35 | #include "keyboard.h" |
7bd279cd | 36 | #include "termhooks.h" |
eb191db2 | 37 | #include "coding.h" |
078e7b4a JB |
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 | ||
c1a2f60a AS |
50 | #ifdef HAVE_UNISTD_H |
51 | #include <unistd.h> | |
52 | #endif | |
53 | ||
078e7b4a JB |
54 | #ifndef X_OK |
55 | #define X_OK 01 | |
56 | #endif | |
57 | ||
078e7b4a | 58 | #include <math.h> |
078e7b4a | 59 | |
c011e9a5 RS |
60 | #ifdef HAVE_SETLOCALE |
61 | #include <locale.h> | |
62 | #endif /* HAVE_SETLOCALE */ | |
63 | ||
f7d279f0 RS |
64 | #ifndef O_RDONLY |
65 | #define O_RDONLY 0 | |
66 | #endif | |
67 | ||
79cf851c | 68 | #ifdef HAVE_FSEEKO |
68c45bf0 PE |
69 | #define file_offset off_t |
70 | #define file_tell ftello | |
71 | #else | |
72 | #define file_offset long | |
73 | #define file_tell ftell | |
74 | #endif | |
75 | ||
03695ace | 76 | #ifndef USE_CRT_DLL |
2c1b5dbe | 77 | extern int errno; |
03695ace | 78 | #endif |
2c1b5dbe | 79 | |
8a1f1537 | 80 | Lisp_Object Qread_char, Qget_file_char, Qstandard_input, Qcurrent_load_list; |
078e7b4a | 81 | Lisp_Object Qvariable_documentation, Vvalues, Vstandard_input, Vafter_load_alist; |
20ea2964 | 82 | Lisp_Object Qascii_character, Qload, Qload_file_name; |
2b6cae0c | 83 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction; |
74549846 | 84 | Lisp_Object Qinhibit_file_name_operation; |
7bd279cd RS |
85 | |
86 | extern Lisp_Object Qevent_symbol_element_mask; | |
74549846 | 87 | extern Lisp_Object Qfile_exists_p; |
078e7b4a JB |
88 | |
89 | /* non-zero if inside `load' */ | |
90 | int load_in_progress; | |
91 | ||
1521a8fa RS |
92 | /* Directory in which the sources were found. */ |
93 | Lisp_Object Vsource_directory; | |
94 | ||
e61b9b87 SM |
95 | /* Search path and suffixes for files to be loaded. */ |
96 | Lisp_Object Vload_path, Vload_suffixes, default_suffixes; | |
078e7b4a | 97 | |
4116ab9f KH |
98 | /* File name of user's init file. */ |
99 | Lisp_Object Vuser_init_file; | |
100 | ||
ae321d28 RS |
101 | /* This is the user-visible association list that maps features to |
102 | lists of defs in their load files. */ | |
103 | Lisp_Object Vload_history; | |
104 | ||
20ea2964 | 105 | /* This is used to build the load history. */ |
ae321d28 RS |
106 | Lisp_Object Vcurrent_load_list; |
107 | ||
4b104c41 RS |
108 | /* List of files that were preloaded. */ |
109 | Lisp_Object Vpreloaded_file_list; | |
110 | ||
20ea2964 RS |
111 | /* Name of file actually being read by `load'. */ |
112 | Lisp_Object Vload_file_name; | |
113 | ||
84a15045 RS |
114 | /* Function to use for reading, in `load' and friends. */ |
115 | Lisp_Object Vload_read_function; | |
116 | ||
4ad679f9 EN |
117 | /* The association list of objects read with the #n=object form. |
118 | Each member of the list has the form (n . object), and is used to | |
119 | look up the object for the corresponding #n# construct. | |
120 | It must be set to nil before all top-level calls to read0. */ | |
121 | Lisp_Object read_objects; | |
122 | ||
b2a30870 RS |
123 | /* Nonzero means load should forcibly load all dynamic doc strings. */ |
124 | static int load_force_doc_strings; | |
125 | ||
94e554db RS |
126 | /* Nonzero means read should convert strings to unibyte. */ |
127 | static int load_convert_to_unibyte; | |
128 | ||
fe0e03f3 KH |
129 | /* Function to use for loading an Emacs lisp source file (not |
130 | compiled) instead of readevalloop. */ | |
131 | Lisp_Object Vload_source_file_function; | |
132 | ||
1ffcc3b1 DL |
133 | /* List of all DEFVAR_BOOL variables. Used by the byte optimizer. */ |
134 | Lisp_Object Vbyte_boolean_vars; | |
135 | ||
d2c6be7f RS |
136 | /* List of descriptors now open for Fload. */ |
137 | static Lisp_Object load_descriptor_list; | |
138 | ||
b2a30870 | 139 | /* File for get_file_char to read from. Use by load. */ |
078e7b4a JB |
140 | static FILE *instream; |
141 | ||
142 | /* When nonzero, read conses in pure space */ | |
143 | static int read_pure; | |
144 | ||
b2a30870 | 145 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
078e7b4a | 146 | static int read_from_string_index; |
bed23cb2 | 147 | static int read_from_string_index_byte; |
078e7b4a | 148 | static int read_from_string_limit; |
17634846 | 149 | |
6f7f43d5 RS |
150 | /* Number of bytes left to read in the buffer character |
151 | that `readchar' has already advanced over. */ | |
152 | static int readchar_backlog; | |
153 | ||
c15cfd1f | 154 | /* This contains the last string skipped with #@. */ |
b2a30870 RS |
155 | static char *saved_doc_string; |
156 | /* Length of buffer allocated in saved_doc_string. */ | |
157 | static int saved_doc_string_size; | |
158 | /* Length of actual data in saved_doc_string. */ | |
159 | static int saved_doc_string_length; | |
160 | /* This is the file position that string came from. */ | |
68c45bf0 | 161 | static file_offset saved_doc_string_position; |
b2a30870 | 162 | |
c15cfd1f RS |
163 | /* This contains the previous string skipped with #@. |
164 | We copy it from saved_doc_string when a new string | |
165 | is put in saved_doc_string. */ | |
166 | static char *prev_saved_doc_string; | |
167 | /* Length of buffer allocated in prev_saved_doc_string. */ | |
168 | static int prev_saved_doc_string_size; | |
169 | /* Length of actual data in prev_saved_doc_string. */ | |
170 | static int prev_saved_doc_string_length; | |
171 | /* This is the file position that string came from. */ | |
68c45bf0 | 172 | static file_offset prev_saved_doc_string_position; |
c15cfd1f | 173 | |
17634846 RS |
174 | /* Nonzero means inside a new-style backquote |
175 | with no surrounding parentheses. | |
176 | Fread initializes this to zero, so we need not specbind it | |
177 | or worry about what happens to it when there is an error. */ | |
178 | static int new_backquote_flag; | |
7ee3bd7b GM |
179 | |
180 | /* A list of file names for files being loaded in Fload. Used to | |
181 | check for recursive loads. */ | |
182 | ||
183 | static Lisp_Object Vloads_in_progress; | |
184 | ||
550a625e GM |
185 | /* Non-zero means load dangerous compiled Lisp files. */ |
186 | ||
187 | int load_dangerous_libraries; | |
188 | ||
189 | /* A regular expression used to detect files compiled with Emacs. */ | |
190 | ||
191 | static Lisp_Object Vbytecomp_version_regexp; | |
192 | ||
a742d646 | 193 | static void to_multibyte P_ ((char **, char **, int *)); |
550a625e GM |
194 | static void readevalloop P_ ((Lisp_Object, FILE*, Lisp_Object, |
195 | Lisp_Object (*) (), int, | |
196 | Lisp_Object, Lisp_Object)); | |
197 | static Lisp_Object load_unwind P_ ((Lisp_Object)); | |
198 | static Lisp_Object load_descriptor_unwind P_ ((Lisp_Object)); | |
199 | ||
078e7b4a JB |
200 | \f |
201 | /* Handle unreading and rereading of characters. | |
202 | Write READCHAR to read a character, | |
fe0e03f3 KH |
203 | UNREAD(c) to unread c to be read again. |
204 | ||
205 | These macros actually read/unread a byte code, multibyte characters | |
206 | are not handled here. The caller should manage them if necessary. | |
207 | */ | |
078e7b4a JB |
208 | |
209 | #define READCHAR readchar (readcharfun) | |
210 | #define UNREAD(c) unreadchar (readcharfun, c) | |
211 | ||
212 | static int | |
213 | readchar (readcharfun) | |
214 | Lisp_Object readcharfun; | |
215 | { | |
216 | Lisp_Object tem; | |
95384e1e | 217 | register int c; |
078e7b4a | 218 | |
cfff016d | 219 | if (BUFFERP (readcharfun)) |
078e7b4a | 220 | { |
bed23cb2 | 221 | register struct buffer *inbuffer = XBUFFER (readcharfun); |
078e7b4a | 222 | |
bed23cb2 RS |
223 | int pt_byte = BUF_PT_BYTE (inbuffer); |
224 | int orig_pt_byte = pt_byte; | |
6f7f43d5 | 225 | |
00a9a935 RS |
226 | if (readchar_backlog > 0) |
227 | /* We get the address of the byte just passed, | |
228 | which is the last byte of the character. | |
229 | The other bytes in this character are consecutive with it, | |
230 | because the gap can't be in the middle of a character. */ | |
231 | return *(BUF_BYTE_ADDRESS (inbuffer, BUF_PT_BYTE (inbuffer) - 1) | |
232 | - --readchar_backlog); | |
233 | ||
bed23cb2 RS |
234 | if (pt_byte >= BUF_ZV_BYTE (inbuffer)) |
235 | return -1; | |
078e7b4a | 236 | |
00a9a935 RS |
237 | readchar_backlog = -1; |
238 | ||
bed23cb2 RS |
239 | if (! NILP (inbuffer->enable_multibyte_characters)) |
240 | { | |
00a9a935 | 241 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
242 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, pt_byte); |
243 | BUF_INC_POS (inbuffer, pt_byte); | |
244 | c = STRING_CHAR (p, pt_byte - orig_pt_byte); | |
245 | } | |
246 | else | |
247 | { | |
248 | c = BUF_FETCH_BYTE (inbuffer, pt_byte); | |
249 | pt_byte++; | |
6f7f43d5 | 250 | } |
bed23cb2 | 251 | SET_BUF_PT_BOTH (inbuffer, BUF_PT (inbuffer) + 1, pt_byte); |
6f7f43d5 | 252 | |
bed23cb2 | 253 | return c; |
078e7b4a | 254 | } |
cfff016d | 255 | if (MARKERP (readcharfun)) |
078e7b4a | 256 | { |
bed23cb2 | 257 | register struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
078e7b4a | 258 | |
bed23cb2 RS |
259 | int bytepos = marker_byte_position (readcharfun); |
260 | int orig_bytepos = bytepos; | |
6f7f43d5 | 261 | |
00a9a935 RS |
262 | if (readchar_backlog > 0) |
263 | /* We get the address of the byte just passed, | |
264 | which is the last byte of the character. | |
265 | The other bytes in this character are consecutive with it, | |
266 | because the gap can't be in the middle of a character. */ | |
267 | return *(BUF_BYTE_ADDRESS (inbuffer, XMARKER (readcharfun)->bytepos - 1) | |
268 | - --readchar_backlog); | |
269 | ||
bed23cb2 RS |
270 | if (bytepos >= BUF_ZV_BYTE (inbuffer)) |
271 | return -1; | |
6f7f43d5 | 272 | |
00a9a935 RS |
273 | readchar_backlog = -1; |
274 | ||
bed23cb2 RS |
275 | if (! NILP (inbuffer->enable_multibyte_characters)) |
276 | { | |
00a9a935 | 277 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
278 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, bytepos); |
279 | BUF_INC_POS (inbuffer, bytepos); | |
280 | c = STRING_CHAR (p, bytepos - orig_bytepos); | |
281 | } | |
282 | else | |
283 | { | |
284 | c = BUF_FETCH_BYTE (inbuffer, bytepos); | |
285 | bytepos++; | |
6f7f43d5 RS |
286 | } |
287 | ||
bed23cb2 RS |
288 | XMARKER (readcharfun)->bytepos = bytepos; |
289 | XMARKER (readcharfun)->charpos++; | |
290 | ||
291 | return c; | |
078e7b4a | 292 | } |
ad0153e4 RS |
293 | |
294 | if (EQ (readcharfun, Qlambda)) | |
295 | return read_bytecode_char (0); | |
296 | ||
078e7b4a | 297 | if (EQ (readcharfun, Qget_file_char)) |
2c1b5dbe KH |
298 | { |
299 | c = getc (instream); | |
300 | #ifdef EINTR | |
301 | /* Interrupted reads have been observed while reading over the network */ | |
302 | while (c == EOF && ferror (instream) && errno == EINTR) | |
303 | { | |
304 | clearerr (instream); | |
305 | c = getc (instream); | |
306 | } | |
307 | #endif | |
308 | return c; | |
309 | } | |
078e7b4a | 310 | |
cfff016d | 311 | if (STRINGP (readcharfun)) |
078e7b4a | 312 | { |
bed23cb2 | 313 | if (read_from_string_index >= read_from_string_limit) |
078e7b4a | 314 | c = -1; |
f0354c03 | 315 | else |
bed23cb2 RS |
316 | FETCH_STRING_CHAR_ADVANCE (c, readcharfun, |
317 | read_from_string_index, | |
318 | read_from_string_index_byte); | |
6f7f43d5 | 319 | |
078e7b4a JB |
320 | return c; |
321 | } | |
322 | ||
323 | tem = call0 (readcharfun); | |
324 | ||
265a9e55 | 325 | if (NILP (tem)) |
078e7b4a JB |
326 | return -1; |
327 | return XINT (tem); | |
328 | } | |
329 | ||
330 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
331 | If the stream is a user function, call it with the char as argument. */ | |
332 | ||
333 | static void | |
334 | unreadchar (readcharfun, c) | |
335 | Lisp_Object readcharfun; | |
336 | int c; | |
337 | { | |
92fddec9 KH |
338 | if (c == -1) |
339 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
340 | since readchar didn't advance it when we read it. */ | |
341 | ; | |
cfff016d | 342 | else if (BUFFERP (readcharfun)) |
d7760ca9 | 343 | { |
bed23cb2 RS |
344 | struct buffer *b = XBUFFER (readcharfun); |
345 | int bytepos = BUF_PT_BYTE (b); | |
d7760ca9 | 346 | |
00a9a935 RS |
347 | if (readchar_backlog >= 0) |
348 | readchar_backlog++; | |
bed23cb2 | 349 | else |
00a9a935 RS |
350 | { |
351 | BUF_PT (b)--; | |
352 | if (! NILP (b->enable_multibyte_characters)) | |
353 | BUF_DEC_POS (b, bytepos); | |
354 | else | |
355 | bytepos--; | |
d7760ca9 | 356 | |
00a9a935 RS |
357 | BUF_PT_BYTE (b) = bytepos; |
358 | } | |
d7760ca9 | 359 | } |
cfff016d | 360 | else if (MARKERP (readcharfun)) |
d7760ca9 | 361 | { |
bed23cb2 RS |
362 | struct buffer *b = XMARKER (readcharfun)->buffer; |
363 | int bytepos = XMARKER (readcharfun)->bytepos; | |
d7760ca9 | 364 | |
00a9a935 RS |
365 | if (readchar_backlog >= 0) |
366 | readchar_backlog++; | |
bed23cb2 | 367 | else |
00a9a935 RS |
368 | { |
369 | XMARKER (readcharfun)->charpos--; | |
370 | if (! NILP (b->enable_multibyte_characters)) | |
371 | BUF_DEC_POS (b, bytepos); | |
372 | else | |
373 | bytepos--; | |
d7760ca9 | 374 | |
00a9a935 RS |
375 | XMARKER (readcharfun)->bytepos = bytepos; |
376 | } | |
d7760ca9 | 377 | } |
cfff016d | 378 | else if (STRINGP (readcharfun)) |
bed23cb2 RS |
379 | { |
380 | read_from_string_index--; | |
381 | read_from_string_index_byte | |
382 | = string_char_to_byte (readcharfun, read_from_string_index); | |
383 | } | |
ad0153e4 RS |
384 | else if (EQ (readcharfun, Qlambda)) |
385 | read_bytecode_char (1); | |
078e7b4a JB |
386 | else if (EQ (readcharfun, Qget_file_char)) |
387 | ungetc (c, instream); | |
388 | else | |
389 | call1 (readcharfun, make_number (c)); | |
390 | } | |
391 | ||
392 | static Lisp_Object read0 (), read1 (), read_list (), read_vector (); | |
6f7f43d5 | 393 | static int read_multibyte (); |
9e062b6c RS |
394 | static Lisp_Object substitute_object_recurse (); |
395 | static void substitute_object_in_subtree (), substitute_in_interval (); | |
396 | ||
078e7b4a | 397 | \f |
bed23cb2 | 398 | /* Get a character from the tty. */ |
078e7b4a | 399 | |
3d9b22be JB |
400 | extern Lisp_Object read_char (); |
401 | ||
f42be754 JB |
402 | /* Read input events until we get one that's acceptable for our purposes. |
403 | ||
404 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
405 | until we get a character we like, and then stuffed into | |
406 | unread_switch_frame. | |
407 | ||
408 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
409 | if the unmodified version of the symbol has a Qascii_character | |
410 | property, and use that character, if present. | |
411 | ||
412 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
413 | get isn't an ASCII character with modifiers. If it's zero but | |
414 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
bb49a192 RS |
415 | character. |
416 | ||
417 | If INPUT_METHOD is nonzero, we invoke the current input method | |
418 | if the character warrants that. */ | |
cc39bc38 | 419 | |
f42be754 | 420 | Lisp_Object |
bb49a192 RS |
421 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii, |
422 | input_method) | |
423 | int no_switch_frame, ascii_required, error_nonascii, input_method; | |
f42be754 | 424 | { |
153a17b7 KH |
425 | register Lisp_Object val, delayed_switch_frame; |
426 | ||
5dbf89bc | 427 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
428 | if (display_hourglass_p) |
429 | cancel_hourglass (); | |
5dbf89bc GM |
430 | #endif |
431 | ||
153a17b7 | 432 | delayed_switch_frame = Qnil; |
f42be754 JB |
433 | |
434 | /* Read until we get an acceptable event. */ | |
435 | retry: | |
bb49a192 RS |
436 | val = read_char (0, 0, 0, |
437 | (input_method ? Qnil : Qt), | |
438 | 0); | |
f42be754 | 439 | |
cfff016d | 440 | if (BUFFERP (val)) |
6c82d689 KH |
441 | goto retry; |
442 | ||
f42be754 | 443 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 444 | character. This is better than signaling an error just because |
f42be754 JB |
445 | the last characters were typed to a separate minibuffer frame, |
446 | for example. Eventually, some code which can deal with | |
447 | switch-frame events will read it and process it. */ | |
448 | if (no_switch_frame | |
449 | && EVENT_HAS_PARAMETERS (val) | |
450 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
451 | { | |
452 | delayed_switch_frame = val; | |
453 | goto retry; | |
454 | } | |
455 | ||
456 | if (ascii_required) | |
457 | { | |
458 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 459 | if (SYMBOLP (val)) |
f42be754 | 460 | { |
95384e1e | 461 | Lisp_Object tem, tem1; |
f42be754 JB |
462 | tem = Fget (val, Qevent_symbol_element_mask); |
463 | if (!NILP (tem)) | |
464 | { | |
465 | tem1 = Fget (Fcar (tem), Qascii_character); | |
466 | /* Merge this symbol's modifier bits | |
467 | with the ASCII equivalent of its basic code. */ | |
468 | if (!NILP (tem1)) | |
baf69866 | 469 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
470 | } |
471 | } | |
472 | ||
473 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 474 | if (!INTEGERP (val)) |
f42be754 JB |
475 | { |
476 | if (error_nonascii) | |
477 | { | |
1ec84625 | 478 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
479 | error ("Non-character input-event"); |
480 | } | |
481 | else | |
482 | goto retry; | |
483 | } | |
484 | } | |
485 | ||
486 | if (! NILP (delayed_switch_frame)) | |
487 | unread_switch_frame = delayed_switch_frame; | |
488 | ||
67868d27 PJ |
489 | #if 0 |
490 | ||
5dbf89bc | 491 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
492 | if (display_hourglass_p) |
493 | start_hourglass (); | |
5dbf89bc | 494 | #endif |
67868d27 PJ |
495 | |
496 | #endif | |
497 | ||
f42be754 | 498 | return val; |
f42be754 JB |
499 | } |
500 | ||
bb49a192 | 501 | DEFUN ("read-char", Fread_char, Sread_char, 0, 2, 0, |
5de38842 PJ |
502 | doc: /* Read a character from the command input (keyboard or macro). |
503 | It is returned as a number. | |
504 | If the user generates an event which is not a character (i.e. a mouse | |
505 | click or function key event), `read-char' signals an error. As an | |
506 | exception, switch-frame events are put off until non-ASCII events can | |
507 | be read. | |
508 | If you want to read non-character events, or ignore them, call | |
509 | `read-event' or `read-char-exclusive' instead. | |
510 | ||
511 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
512 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
513 | input method is turned on in the current buffer, that input method | |
514 | is used for reading a character. */) | |
515 | (prompt, inherit_input_method) | |
fc351d2f | 516 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 517 | { |
bb49a192 RS |
518 | if (! NILP (prompt)) |
519 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 520 | return read_filtered_event (1, 1, 1, ! NILP (inherit_input_method)); |
078e7b4a JB |
521 | } |
522 | ||
bb49a192 | 523 | DEFUN ("read-event", Fread_event, Sread_event, 0, 2, 0, |
5de38842 PJ |
524 | doc: /* Read an event object from the input stream. |
525 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
526 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
527 | input method is turned on in the current buffer, that input method | |
528 | is used for reading a character. */) | |
529 | (prompt, inherit_input_method) | |
fc351d2f | 530 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 531 | { |
bb49a192 RS |
532 | if (! NILP (prompt)) |
533 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 534 | return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method)); |
078e7b4a JB |
535 | } |
536 | ||
bb49a192 | 537 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 2, 0, |
5de38842 PJ |
538 | doc: /* Read a character from the command input (keyboard or macro). |
539 | It is returned as a number. Non-character events are ignored. | |
540 | ||
541 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
542 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
543 | input method is turned on in the current buffer, that input method | |
544 | is used for reading a character. */) | |
545 | (prompt, inherit_input_method) | |
fc351d2f | 546 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 547 | { |
bb49a192 RS |
548 | if (! NILP (prompt)) |
549 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 550 | return read_filtered_event (1, 1, 0, ! NILP (inherit_input_method)); |
078e7b4a | 551 | } |
078e7b4a JB |
552 | |
553 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
5de38842 PJ |
554 | doc: /* Don't use this yourself. */) |
555 | () | |
078e7b4a JB |
556 | { |
557 | register Lisp_Object val; | |
1805de4f | 558 | XSETINT (val, getc (instream)); |
078e7b4a JB |
559 | return val; |
560 | } | |
da84f340 GM |
561 | |
562 | ||
550a625e | 563 | \f |
da84f340 GM |
564 | /* Value is non-zero if the file asswociated with file descriptor FD |
565 | is a compiled Lisp file that's safe to load. Only files compiled | |
566 | with Emacs are safe to load. Files compiled with XEmacs can lead | |
567 | to a crash in Fbyte_code because of an incompatible change in the | |
568 | byte compiler. */ | |
569 | ||
570 | static int | |
571 | safe_to_load_p (fd) | |
572 | int fd; | |
573 | { | |
574 | char buf[512]; | |
575 | int nbytes, i; | |
576 | int safe_p = 1; | |
577 | ||
578 | /* Read the first few bytes from the file, and look for a line | |
579 | specifying the byte compiler version used. */ | |
580 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
581 | if (nbytes > 0) | |
582 | { | |
583 | buf[nbytes] = '\0'; | |
584 | ||
585 | /* Skip to the next newline, skipping over the initial `ELC' | |
586 | with NUL bytes following it. */ | |
587 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) | |
588 | ; | |
589 | ||
590 | if (i < nbytes | |
591 | && fast_c_string_match_ignore_case (Vbytecomp_version_regexp, | |
592 | buf + i) < 0) | |
593 | safe_p = 0; | |
594 | } | |
595 | ||
596 | lseek (fd, 0, SEEK_SET); | |
597 | return safe_p; | |
598 | } | |
599 | ||
600 | ||
7ee3bd7b GM |
601 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
602 | after loading a file successfully. */ | |
603 | ||
604 | static Lisp_Object | |
605 | record_load_unwind (old) | |
606 | Lisp_Object old; | |
607 | { | |
608 | return Vloads_in_progress = old; | |
609 | } | |
610 | ||
611 | ||
f0a50954 | 612 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
613 | doc: /* Execute a file of Lisp code named FILE. |
614 | First try FILE with `.elc' appended, then try with `.el', | |
615 | then try FILE unmodified. Environment variable references in FILE | |
616 | are replaced with their values by calling `substitute-in-file-name'. | |
617 | This function searches the directories in `load-path'. | |
618 | If optional second arg NOERROR is non-nil, | |
619 | report no error if FILE doesn't exist. | |
620 | Print messages at start and end of loading unless | |
621 | optional third arg NOMESSAGE is non-nil. | |
622 | If optional fourth arg NOSUFFIX is non-nil, don't try adding | |
623 | suffixes `.elc' or `.el' to the specified name FILE. | |
624 | If optional fifth arg MUST-SUFFIX is non-nil, insist on | |
625 | the suffix `.elc' or `.el'; don't accept just FILE unless | |
626 | it ends in one of those suffixes or includes a directory name. | |
627 | Return t if file exists. */) | |
628 | (file, noerror, nomessage, nosuffix, must_suffix) | |
f0a50954 | 629 | Lisp_Object file, noerror, nomessage, nosuffix, must_suffix; |
078e7b4a JB |
630 | { |
631 | register FILE *stream; | |
632 | register int fd = -1; | |
633 | register Lisp_Object lispstream; | |
078e7b4a JB |
634 | int count = specpdl_ptr - specpdl; |
635 | Lisp_Object temp; | |
636 | struct gcpro gcpro1; | |
eb191db2 | 637 | Lisp_Object found, efound; |
04fc68e7 RS |
638 | /* 1 means we printed the ".el is newer" message. */ |
639 | int newer = 0; | |
640 | /* 1 means we are loading a compiled file. */ | |
641 | int compiled = 0; | |
c2225d00 | 642 | Lisp_Object handler; |
456c67a4 | 643 | int safe_p = 1; |
229ba775 | 644 | char *fmode = "r"; |
317073d5 | 645 | #ifdef DOS_NT |
229ba775 | 646 | fmode = "rt"; |
317073d5 | 647 | #endif /* DOS_NT */ |
078e7b4a | 648 | |
b7826503 | 649 | CHECK_STRING (file); |
078e7b4a | 650 | |
c2225d00 | 651 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
652 | /* This shouldn't be necessary any more now that `openp' handles it right. |
653 | handler = Ffind_file_name_handler (file, Qload); | |
654 | if (!NILP (handler)) | |
655 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 656 | |
07a0bda3 RS |
657 | /* Do this after the handler to avoid |
658 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
659 | (Below here, we care only whether they are nil or not.) |
660 | The presence of this call is the result of a historical accident: | |
661 | it used to be in every file-operations and when it got removed | |
662 | everywhere, it accidentally stayed here. Since then, enough people | |
663 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
664 | that it seemed risky to remove. */ | |
0745dce9 | 665 | file = Fsubstitute_in_file_name (file); |
07a0bda3 | 666 | |
078e7b4a JB |
667 | /* Avoid weird lossage with null string as arg, |
668 | since it would try to load a directory as a Lisp file */ | |
0745dce9 | 669 | if (XSTRING (file)->size > 0) |
078e7b4a | 670 | { |
471aa4a0 | 671 | int size = STRING_BYTES (XSTRING (file)); |
e61b9b87 | 672 | Lisp_Object tmp[2]; |
211f7dcd | 673 | |
0745dce9 | 674 | GCPRO1 (file); |
211f7dcd RS |
675 | |
676 | if (! NILP (must_suffix)) | |
677 | { | |
678 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
679 | if (size > 3 | |
680 | && !strcmp (XSTRING (file)->data + size - 3, ".el")) | |
681 | must_suffix = Qnil; | |
682 | else if (size > 4 | |
683 | && !strcmp (XSTRING (file)->data + size - 4, ".elc")) | |
684 | must_suffix = Qnil; | |
685 | /* Don't insist on adding a suffix | |
686 | if the argument includes a directory name. */ | |
687 | else if (! NILP (Ffile_name_directory (file))) | |
688 | must_suffix = Qnil; | |
689 | } | |
690 | ||
f0a50954 | 691 | fd = openp (Vload_path, file, |
e61b9b87 SM |
692 | (!NILP (nosuffix) ? Qnil |
693 | : !NILP (must_suffix) ? Vload_suffixes | |
694 | : Fappend (2, (tmp[0] = Vload_suffixes, | |
695 | tmp[1] = default_suffixes, | |
696 | tmp))), | |
86d00812 | 697 | &found, Qnil); |
5a6e5452 | 698 | UNGCPRO; |
078e7b4a JB |
699 | } |
700 | ||
96dc0f4e | 701 | if (fd == -1) |
078e7b4a | 702 | { |
265a9e55 | 703 | if (NILP (noerror)) |
078e7b4a JB |
704 | while (1) |
705 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
0745dce9 | 706 | Fcons (file, Qnil))); |
078e7b4a JB |
707 | else |
708 | return Qnil; | |
709 | } | |
710 | ||
ba0d1195 | 711 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
712 | if (EQ (Qt, Vuser_init_file)) |
713 | Vuser_init_file = found; | |
714 | ||
96dc0f4e MB |
715 | /* If FD is -2, that means openp found a magic file. */ |
716 | if (fd == -2) | |
74549846 | 717 | { |
5e24a1f7 KH |
718 | if (NILP (Fequal (found, file))) |
719 | /* If FOUND is a different file name from FILE, | |
720 | find its handler even if we have already inhibited | |
721 | the `load' operation on FILE. */ | |
722 | handler = Ffind_file_name_handler (found, Qt); | |
723 | else | |
724 | handler = Ffind_file_name_handler (found, Qload); | |
725 | if (! NILP (handler)) | |
726 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
74549846 RS |
727 | } |
728 | ||
550a625e GM |
729 | /* Check if we're stuck in a recursive load cycle. |
730 | ||
731 | 2000-09-21: It's not possible to just check for the file loaded | |
732 | being a member of Vloads_in_progress. This fails because of the | |
733 | way the byte compiler currently works; `provide's are not | |
734 | evaluted, see font-lock.el/jit-lock.el as an example. This | |
735 | leads to a certain amount of ``normal'' recursion. | |
736 | ||
737 | Also, just loading a file recursively is not always an error in | |
738 | the general case; the second load may do something different. */ | |
3ba6fd9a RS |
739 | { |
740 | int count = 0; | |
741 | Lisp_Object tem; | |
742 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
743 | if (!NILP (Fequal (found, XCAR (tem)))) | |
744 | count++; | |
745 | if (count > 3) | |
746 | Fsignal (Qerror, Fcons (build_string ("Recursive load"), | |
747 | Fcons (found, Vloads_in_progress))); | |
748 | record_unwind_protect (record_load_unwind, Vloads_in_progress); | |
749 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
750 | } | |
7ee3bd7b | 751 | |
471aa4a0 | 752 | if (!bcmp (&(XSTRING (found)->data[STRING_BYTES (XSTRING (found)) - 4]), |
96dc0f4e MB |
753 | ".elc", 4)) |
754 | /* Load .elc files directly, but not when they are | |
755 | remote and have no handler! */ | |
078e7b4a | 756 | { |
96dc0f4e | 757 | if (fd != -2) |
da84f340 | 758 | { |
96dc0f4e MB |
759 | struct stat s1, s2; |
760 | int result; | |
da84f340 | 761 | |
96dc0f4e MB |
762 | if (!safe_to_load_p (fd)) |
763 | { | |
764 | safe_p = 0; | |
765 | if (!load_dangerous_libraries) | |
766 | error ("File `%s' was not compiled in Emacs", | |
767 | XSTRING (found)->data); | |
768 | else if (!NILP (nomessage)) | |
769 | message_with_string ("File `%s' not compiled in Emacs", found, 1); | |
770 | } | |
04fc68e7 | 771 | |
96dc0f4e MB |
772 | compiled = 1; |
773 | ||
eb191db2 EZ |
774 | GCPRO1 (efound); |
775 | efound = ENCODE_FILE (found); | |
776 | ||
26fbf20b | 777 | #ifdef DOS_NT |
96dc0f4e | 778 | fmode = "rb"; |
26fbf20b | 779 | #endif /* DOS_NT */ |
eb191db2 EZ |
780 | stat ((char *)XSTRING (efound)->data, &s1); |
781 | XSTRING (efound)->data[STRING_BYTES (XSTRING (efound)) - 1] = 0; | |
782 | result = stat ((char *)XSTRING (efound)->data, &s2); | |
783 | XSTRING (efound)->data[STRING_BYTES (XSTRING (efound)) - 1] = 'c'; | |
784 | UNGCPRO; | |
785 | ||
96dc0f4e MB |
786 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
787 | { | |
788 | /* Make the progress messages mention that source is newer. */ | |
789 | newer = 1; | |
04fc68e7 | 790 | |
96dc0f4e | 791 | /* If we won't print another message, mention this anyway. */ |
714d8c39 GM |
792 | if (!NILP (nomessage)) |
793 | { | |
794 | Lisp_Object file; | |
795 | file = Fsubstring (found, make_number (0), make_number (-1)); | |
796 | message_with_string ("Source file `%s' newer than byte-compiled file", | |
797 | file, SMBP (file)); | |
798 | } | |
96dc0f4e | 799 | } |
51ac6f83 | 800 | } |
078e7b4a | 801 | } |
fe0e03f3 KH |
802 | else |
803 | { | |
804 | /* We are loading a source file (*.el). */ | |
805 | if (!NILP (Vload_source_file_function)) | |
806 | { | |
7ee3bd7b | 807 | Lisp_Object val; |
96dc0f4e MB |
808 | |
809 | if (fd >= 0) | |
68c45bf0 | 810 | emacs_close (fd); |
7ee3bd7b GM |
811 | val = call4 (Vload_source_file_function, found, file, |
812 | NILP (noerror) ? Qnil : Qt, | |
813 | NILP (nomessage) ? Qnil : Qt); | |
814 | return unbind_to (count, val); | |
fe0e03f3 KH |
815 | } |
816 | } | |
078e7b4a | 817 | |
229ba775 | 818 | #ifdef WINDOWSNT |
68c45bf0 | 819 | emacs_close (fd); |
eb191db2 EZ |
820 | GCPRO1 (efound); |
821 | efound = ENCODE_FILE (found); | |
822 | stream = fopen ((char *) XSTRING (efound)->data, fmode); | |
823 | UNGCPRO; | |
229ba775 EZ |
824 | #else /* not WINDOWSNT */ |
825 | stream = fdopen (fd, fmode); | |
826 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
827 | if (stream == 0) |
828 | { | |
68c45bf0 | 829 | emacs_close (fd); |
0745dce9 | 830 | error ("Failure to create stdio stream for %s", XSTRING (file)->data); |
078e7b4a JB |
831 | } |
832 | ||
4b104c41 RS |
833 | if (! NILP (Vpurify_flag)) |
834 | Vpreloaded_file_list = Fcons (file, Vpreloaded_file_list); | |
835 | ||
04fc68e7 RS |
836 | if (NILP (nomessage)) |
837 | { | |
da84f340 GM |
838 | if (!safe_p) |
839 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
840 | file, 1); | |
841 | else if (!compiled) | |
e28552a4 | 842 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 843 | else if (newer) |
e28552a4 RS |
844 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
845 | file, 1); | |
db5cae4b | 846 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 847 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 848 | } |
078e7b4a | 849 | |
0745dce9 | 850 | GCPRO1 (file); |
838abf56 | 851 | lispstream = Fcons (Qnil, Qnil); |
f5df591a KR |
852 | XSETCARFASTINT (lispstream, (EMACS_UINT)stream >> 16); |
853 | XSETCDRFASTINT (lispstream, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 854 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f | 855 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 856 | specbind (Qload_file_name, found); |
74549846 | 857 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
858 | load_descriptor_list |
859 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 860 | load_in_progress++; |
976350af | 861 | readevalloop (Qget_file_char, stream, file, Feval, 0, Qnil, Qnil); |
078e7b4a JB |
862 | unbind_to (count, Qnil); |
863 | ||
864 | /* Run any load-hooks for this file. */ | |
0745dce9 | 865 | temp = Fassoc (file, Vafter_load_alist); |
265a9e55 | 866 | if (!NILP (temp)) |
078e7b4a JB |
867 | Fprogn (Fcdr (temp)); |
868 | UNGCPRO; | |
869 | ||
b2a30870 RS |
870 | if (saved_doc_string) |
871 | free (saved_doc_string); | |
872 | saved_doc_string = 0; | |
873 | saved_doc_string_size = 0; | |
874 | ||
c15cfd1f | 875 | if (prev_saved_doc_string) |
3cb65b0e | 876 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
877 | prev_saved_doc_string = 0; |
878 | prev_saved_doc_string_size = 0; | |
879 | ||
265a9e55 | 880 | if (!noninteractive && NILP (nomessage)) |
04fc68e7 | 881 | { |
da84f340 GM |
882 | if (!safe_p) |
883 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
884 | file, 1); | |
885 | else if (!compiled) | |
e28552a4 | 886 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 887 | else if (newer) |
e28552a4 RS |
888 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
889 | file, 1); | |
db5cae4b | 890 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 891 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 892 | } |
7ee3bd7b | 893 | |
078e7b4a JB |
894 | return Qt; |
895 | } | |
896 | ||
897 | static Lisp_Object | |
898 | load_unwind (stream) /* used as unwind-protect function in load */ | |
899 | Lisp_Object stream; | |
900 | { | |
c1d497be KR |
901 | fclose ((FILE *) (XFASTINT (XCAR (stream)) << 16 |
902 | | XFASTINT (XCDR (stream)))); | |
078e7b4a JB |
903 | if (--load_in_progress < 0) load_in_progress = 0; |
904 | return Qnil; | |
905 | } | |
906 | ||
d2c6be7f RS |
907 | static Lisp_Object |
908 | load_descriptor_unwind (oldlist) | |
909 | Lisp_Object oldlist; | |
910 | { | |
911 | load_descriptor_list = oldlist; | |
838abf56 | 912 | return Qnil; |
d2c6be7f RS |
913 | } |
914 | ||
915 | /* Close all descriptors in use for Floads. | |
916 | This is used when starting a subprocess. */ | |
917 | ||
918 | void | |
919 | close_load_descs () | |
920 | { | |
f3849f25 | 921 | #ifndef WINDOWSNT |
d2c6be7f | 922 | Lisp_Object tail; |
c1d497be | 923 | for (tail = load_descriptor_list; !NILP (tail); tail = XCDR (tail)) |
68c45bf0 | 924 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 925 | #endif |
d2c6be7f | 926 | } |
078e7b4a JB |
927 | \f |
928 | static int | |
929 | complete_filename_p (pathname) | |
930 | Lisp_Object pathname; | |
931 | { | |
932 | register unsigned char *s = XSTRING (pathname)->data; | |
317073d5 RS |
933 | return (IS_DIRECTORY_SEP (s[0]) |
934 | || (XSTRING (pathname)->size > 2 | |
935 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) | |
078e7b4a JB |
936 | #ifdef ALTOS |
937 | || *s == '@' | |
938 | #endif | |
939 | #ifdef VMS | |
940 | || index (s, ':') | |
941 | #endif /* VMS */ | |
942 | ); | |
943 | } | |
944 | ||
86d00812 SM |
945 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
946 | doc: /* Search for FILENAME through PATH. | |
947 | If SUFFIXES is non-nil, it should be a list of suffixes to append to | |
948 | file name when searching. | |
949 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
950 | PREDICATE can also be an integer to pass to the access(2) function, | |
951 | in which case file-name-handlers are ignored. */) | |
952 | (filename, path, suffixes, predicate) | |
953 | Lisp_Object filename, path, suffixes, predicate; | |
954 | { | |
955 | Lisp_Object file; | |
956 | int fd = openp (path, filename, suffixes, &file, predicate); | |
957 | if (NILP (predicate) && fd > 0) | |
958 | close (fd); | |
959 | return file; | |
960 | } | |
961 | ||
962 | ||
078e7b4a JB |
963 | /* Search for a file whose name is STR, looking in directories |
964 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
965 | On success, returns a file descriptor. On failure, returns -1. |
966 | ||
e61b9b87 SM |
967 | SUFFIXES is a list of strings containing possible suffixes. |
968 | The empty suffix is automatically added iff the list is empty. | |
969 | ||
86d00812 SM |
970 | PREDICATE non-nil means don't open the files, |
971 | just look for one that satisfies the predicate. In this case, | |
972 | returns 1 on success. The predicate can be a lisp function or | |
973 | an integer to pass to `access' (in which case file-name-handlers | |
974 | are ignored). | |
078e7b4a JB |
975 | |
976 | If STOREPTR is nonzero, it points to a slot where the name of | |
977 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
978 | nil is stored there on failure. |
979 | ||
96dc0f4e | 980 | If the file we find is remote, return -2 |
86d00812 | 981 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
982 | |
983 | int | |
86d00812 | 984 | openp (path, str, suffixes, storeptr, predicate) |
078e7b4a | 985 | Lisp_Object path, str; |
e61b9b87 | 986 | Lisp_Object suffixes; |
078e7b4a | 987 | Lisp_Object *storeptr; |
86d00812 | 988 | Lisp_Object predicate; |
078e7b4a JB |
989 | { |
990 | register int fd; | |
991 | int fn_size = 100; | |
992 | char buf[100]; | |
993 | register char *fn = buf; | |
994 | int absolute = 0; | |
995 | int want_size; | |
74549846 | 996 | Lisp_Object filename; |
078e7b4a | 997 | struct stat st; |
eb191db2 EZ |
998 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
999 | Lisp_Object string, tail, encoded_fn; | |
e61b9b87 SM |
1000 | int max_suffix_len = 0; |
1001 | ||
1002 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) | |
1003 | { | |
f5df591a | 1004 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1005 | max_suffix_len = max (max_suffix_len, |
990ff03c | 1006 | STRING_BYTES (XSTRING (XCAR (tail)))); |
e61b9b87 | 1007 | } |
078e7b4a | 1008 | |
990ff03c | 1009 | string = filename = Qnil; |
eb191db2 EZ |
1010 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1011 | ||
078e7b4a JB |
1012 | if (storeptr) |
1013 | *storeptr = Qnil; | |
1014 | ||
1015 | if (complete_filename_p (str)) | |
1016 | absolute = 1; | |
1017 | ||
e61b9b87 | 1018 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1019 | { |
e61b9b87 | 1020 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a JB |
1021 | if (!complete_filename_p (filename)) |
1022 | /* If there are non-absolute elts in PATH (eg ".") */ | |
1023 | /* Of course, this could conceivably lose if luser sets | |
1024 | default-directory to be something non-absolute... */ | |
1025 | { | |
1026 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
1027 | if (!complete_filename_p (filename)) | |
1028 | /* Give up on this path element! */ | |
1029 | continue; | |
1030 | } | |
1031 | ||
1032 | /* Calculate maximum size of any filename made from | |
1033 | this path element/specified file name and any possible suffix. */ | |
e61b9b87 | 1034 | want_size = max_suffix_len + STRING_BYTES (XSTRING (filename)) + 1; |
078e7b4a JB |
1035 | if (fn_size < want_size) |
1036 | fn = (char *) alloca (fn_size = 100 + want_size); | |
1037 | ||
078e7b4a | 1038 | /* Loop over suffixes. */ |
e61b9b87 SM |
1039 | for (tail = NILP (suffixes) ? default_suffixes : suffixes; |
1040 | CONSP (tail); tail = XCDR (tail)) | |
078e7b4a | 1041 | { |
e61b9b87 | 1042 | int lsuffix = STRING_BYTES (XSTRING (XCAR (tail))); |
74549846 | 1043 | Lisp_Object handler; |
eb191db2 | 1044 | int exists; |
078e7b4a | 1045 | |
c49afcd7 RS |
1046 | /* Concatenate path element/specified name with the suffix. |
1047 | If the directory starts with /:, remove that. */ | |
1048 | if (XSTRING (filename)->size > 2 | |
1049 | && XSTRING (filename)->data[0] == '/' | |
1050 | && XSTRING (filename)->data[1] == ':') | |
1051 | { | |
1052 | strncpy (fn, XSTRING (filename)->data + 2, | |
471aa4a0 KH |
1053 | STRING_BYTES (XSTRING (filename)) - 2); |
1054 | fn[STRING_BYTES (XSTRING (filename)) - 2] = 0; | |
c49afcd7 RS |
1055 | } |
1056 | else | |
1057 | { | |
471aa4a0 KH |
1058 | strncpy (fn, XSTRING (filename)->data, |
1059 | STRING_BYTES (XSTRING (filename))); | |
1060 | fn[STRING_BYTES (XSTRING (filename))] = 0; | |
c49afcd7 RS |
1061 | } |
1062 | ||
078e7b4a | 1063 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
e61b9b87 | 1064 | strncat (fn, XSTRING (XCAR (tail))->data, lsuffix); |
eb191db2 | 1065 | |
74549846 | 1066 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1067 | /* We used to only check for handlers on non-absolute file names: |
1068 | if (absolute) | |
1069 | handler = Qnil; | |
1070 | else | |
1071 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1072 | It's not clear why that was the case and it breaks things like | |
1073 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
1074 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
eb191db2 | 1075 | string = build_string (fn); |
86d00812 SM |
1076 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1077 | { | |
1078 | if (NILP (predicate)) | |
1079 | exists = !NILP (Ffile_readable_p (string)); | |
1080 | else | |
1081 | exists = !NILP (call1 (predicate, string)); | |
eb191db2 | 1082 | if (exists && !NILP (Ffile_directory_p (string))) |
74549846 RS |
1083 | exists = 0; |
1084 | ||
1085 | if (exists) | |
078e7b4a JB |
1086 | { |
1087 | /* We succeeded; return this descriptor and filename. */ | |
1088 | if (storeptr) | |
eb191db2 | 1089 | *storeptr = string; |
5ef2a3c0 | 1090 | UNGCPRO; |
96dc0f4e | 1091 | return -2; |
74549846 RS |
1092 | } |
1093 | } | |
1094 | else | |
1095 | { | |
eb191db2 EZ |
1096 | char *pfn; |
1097 | ||
1098 | encoded_fn = ENCODE_FILE (string); | |
1099 | pfn = XSTRING (encoded_fn)->data; | |
1100 | exists = (stat (pfn, &st) >= 0 | |
1101 | && (st.st_mode & S_IFMT) != S_IFDIR); | |
74549846 RS |
1102 | if (exists) |
1103 | { | |
1104 | /* Check that we can access or open it. */ | |
86d00812 SM |
1105 | if (NATNUMP (predicate)) |
1106 | fd = (access (pfn, XFASTINT (predicate)) == 0) ? 1 : -1; | |
74549846 | 1107 | else |
eb191db2 | 1108 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1109 | |
1110 | if (fd >= 0) | |
1111 | { | |
1112 | /* We succeeded; return this descriptor and filename. */ | |
1113 | if (storeptr) | |
eb191db2 | 1114 | *storeptr = string; |
74549846 RS |
1115 | UNGCPRO; |
1116 | return fd; | |
1117 | } | |
078e7b4a JB |
1118 | } |
1119 | } | |
078e7b4a | 1120 | } |
5a6e5452 | 1121 | if (absolute) |
5ef2a3c0 | 1122 | break; |
078e7b4a JB |
1123 | } |
1124 | ||
5ef2a3c0 KH |
1125 | UNGCPRO; |
1126 | return -1; | |
078e7b4a JB |
1127 | } |
1128 | ||
1129 | \f | |
ae321d28 RS |
1130 | /* Merge the list we've accumulated of globals from the current input source |
1131 | into the load_history variable. The details depend on whether | |
1132 | the source has an associated file name or not. */ | |
1133 | ||
1134 | static void | |
1135 | build_load_history (stream, source) | |
1136 | FILE *stream; | |
1137 | Lisp_Object source; | |
1138 | { | |
1139 | register Lisp_Object tail, prev, newelt; | |
1140 | register Lisp_Object tem, tem2; | |
1141 | register int foundit, loading; | |
1142 | ||
1143 | loading = stream || !NARROWED; | |
1144 | ||
1145 | tail = Vload_history; | |
1146 | prev = Qnil; | |
1147 | foundit = 0; | |
86d00812 | 1148 | while (CONSP (tail)) |
ae321d28 | 1149 | { |
86d00812 | 1150 | tem = XCAR (tail); |
ae321d28 RS |
1151 | |
1152 | /* Find the feature's previous assoc list... */ | |
1153 | if (!NILP (Fequal (source, Fcar (tem)))) | |
1154 | { | |
1155 | foundit = 1; | |
1156 | ||
1157 | /* If we're loading, remove it. */ | |
1158 | if (loading) | |
86d00812 | 1159 | { |
ae321d28 | 1160 | if (NILP (prev)) |
86d00812 | 1161 | Vload_history = XCDR (tail); |
ae321d28 | 1162 | else |
86d00812 | 1163 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1164 | } |
1165 | ||
1166 | /* Otherwise, cons on new symbols that are not already members. */ | |
1167 | else | |
1168 | { | |
1169 | tem2 = Vcurrent_load_list; | |
1170 | ||
1171 | while (CONSP (tem2)) | |
1172 | { | |
86d00812 | 1173 | newelt = XCAR (tem2); |
ae321d28 RS |
1174 | |
1175 | if (NILP (Fmemq (newelt, tem))) | |
86d00812 SM |
1176 | Fsetcar (tail, Fcons (XCAR (tem), |
1177 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1178 | |
86d00812 | 1179 | tem2 = XCDR (tem2); |
ae321d28 RS |
1180 | QUIT; |
1181 | } | |
1182 | } | |
1183 | } | |
1184 | else | |
1185 | prev = tail; | |
86d00812 | 1186 | tail = XCDR (tail); |
ae321d28 RS |
1187 | QUIT; |
1188 | } | |
1189 | ||
8a1f1537 RS |
1190 | /* If we're loading, cons the new assoc onto the front of load-history, |
1191 | the most-recently-loaded position. Also do this if we didn't find | |
1192 | an existing member for the current source. */ | |
1193 | if (loading || !foundit) | |
1194 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
1195 | Vload_history); | |
ae321d28 RS |
1196 | } |
1197 | ||
078e7b4a | 1198 | Lisp_Object |
232ccf27 DL |
1199 | unreadpure (junk) /* Used as unwind-protect function in readevalloop */ |
1200 | Lisp_Object junk; | |
078e7b4a JB |
1201 | { |
1202 | read_pure = 0; | |
1203 | return Qnil; | |
1204 | } | |
1205 | ||
94e554db RS |
1206 | static Lisp_Object |
1207 | readevalloop_1 (old) | |
1208 | Lisp_Object old; | |
1209 | { | |
1210 | load_convert_to_unibyte = ! NILP (old); | |
1211 | return Qnil; | |
1212 | } | |
1213 | ||
9c97398c GM |
1214 | /* Signal an `end-of-file' error, if possible with file name |
1215 | information. */ | |
1216 | ||
1217 | static void | |
1218 | end_of_file_error () | |
1219 | { | |
1220 | Lisp_Object data; | |
1221 | ||
1222 | if (STRINGP (Vload_file_name)) | |
1223 | data = Fcons (Vload_file_name, Qnil); | |
1224 | else | |
1225 | data = Qnil; | |
1226 | ||
1227 | Fsignal (Qend_of_file, data); | |
1228 | } | |
1229 | ||
94e554db | 1230 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af RS |
1231 | for this invocation. |
1232 | READFUN, if non-nil, is used instead of `read'. */ | |
94e554db | 1233 | |
078e7b4a | 1234 | static void |
976350af | 1235 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag, unibyte, readfun) |
078e7b4a | 1236 | Lisp_Object readcharfun; |
ae321d28 RS |
1237 | FILE *stream; |
1238 | Lisp_Object sourcename; | |
078e7b4a JB |
1239 | Lisp_Object (*evalfun) (); |
1240 | int printflag; | |
976350af | 1241 | Lisp_Object unibyte, readfun; |
078e7b4a JB |
1242 | { |
1243 | register int c; | |
1244 | register Lisp_Object val; | |
1245 | int count = specpdl_ptr - specpdl; | |
8a1f1537 | 1246 | struct gcpro gcpro1; |
49cf7ff4 | 1247 | struct buffer *b = 0; |
f38952fe | 1248 | int continue_reading_p; |
49cf7ff4 RS |
1249 | |
1250 | if (BUFFERP (readcharfun)) | |
1251 | b = XBUFFER (readcharfun); | |
1252 | else if (MARKERP (readcharfun)) | |
1253 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
1254 | |
1255 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 1256 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1257 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1258 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1259 | |
00a9a935 | 1260 | readchar_backlog = -1; |
6f7f43d5 | 1261 | |
8a1f1537 | 1262 | GCPRO1 (sourcename); |
ae321d28 | 1263 | |
ae321d28 RS |
1264 | LOADHIST_ATTACH (sourcename); |
1265 | ||
f38952fe GM |
1266 | continue_reading_p = 1; |
1267 | while (continue_reading_p) | |
078e7b4a | 1268 | { |
49cf7ff4 RS |
1269 | if (b != 0 && NILP (b->name)) |
1270 | error ("Reading from killed buffer"); | |
1271 | ||
078e7b4a JB |
1272 | instream = stream; |
1273 | c = READCHAR; | |
1274 | if (c == ';') | |
1275 | { | |
1276 | while ((c = READCHAR) != '\n' && c != -1); | |
1277 | continue; | |
1278 | } | |
1279 | if (c < 0) break; | |
6069d957 RS |
1280 | |
1281 | /* Ignore whitespace here, so we can detect eof. */ | |
1282 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
1283 | continue; | |
078e7b4a | 1284 | |
265a9e55 | 1285 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 1286 | { |
0e326373 | 1287 | int count1 = specpdl_ptr - specpdl; |
078e7b4a JB |
1288 | record_unwind_protect (unreadpure, Qnil); |
1289 | val = read_list (-1, readcharfun); | |
0e326373 | 1290 | unbind_to (count1, Qnil); |
078e7b4a JB |
1291 | } |
1292 | else | |
1293 | { | |
1294 | UNREAD (c); | |
4ad679f9 | 1295 | read_objects = Qnil; |
f38952fe GM |
1296 | if (!NILP (readfun)) |
1297 | { | |
1298 | val = call1 (readfun, readcharfun); | |
1299 | ||
1300 | /* If READCHARFUN has set point to ZV, we should | |
1301 | stop reading, even if the form read sets point | |
1302 | to a different value when evaluated. */ | |
1303 | if (BUFFERP (readcharfun)) | |
1304 | { | |
1305 | struct buffer *b = XBUFFER (readcharfun); | |
1306 | if (BUF_PT (b) == BUF_ZV (b)) | |
1307 | continue_reading_p = 0; | |
1308 | } | |
1309 | } | |
976350af | 1310 | else if (! NILP (Vload_read_function)) |
84a15045 | 1311 | val = call1 (Vload_read_function, readcharfun); |
976350af RS |
1312 | else |
1313 | val = read0 (readcharfun); | |
078e7b4a JB |
1314 | } |
1315 | ||
1316 | val = (*evalfun) (val); | |
f38952fe | 1317 | |
078e7b4a JB |
1318 | if (printflag) |
1319 | { | |
1320 | Vvalues = Fcons (val, Vvalues); | |
1321 | if (EQ (Vstandard_output, Qt)) | |
1322 | Fprin1 (val, Qnil); | |
1323 | else | |
1324 | Fprint (val, Qnil); | |
1325 | } | |
1326 | } | |
1327 | ||
ae321d28 | 1328 | build_load_history (stream, sourcename); |
ae321d28 RS |
1329 | UNGCPRO; |
1330 | ||
078e7b4a JB |
1331 | unbind_to (count, Qnil); |
1332 | } | |
1333 | ||
1076254d | 1334 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 PJ |
1335 | doc: /* Execute the current buffer as Lisp code. |
1336 | Programs can pass two arguments, BUFFER and PRINTFLAG. | |
1337 | BUFFER is the buffer to evaluate (nil means use current buffer). | |
1338 | PRINTFLAG controls printing of output: | |
1339 | nil means discard it; anything else is stream for print. | |
1340 | ||
1341 | If the optional third argument FILENAME is non-nil, | |
1342 | it specifies the file name to use for `load-history'. | |
1343 | The optional fourth argument UNIBYTE specifies `load-convert-to-unibyte' | |
1344 | for this invocation. | |
1345 | ||
1346 | The optional fifth argument DO-ALLOW-PRINT, if not-nil, specifies that | |
1347 | `print' and related functions should work normally even if PRINTFLAG is nil. | |
1348 | ||
1349 | This function preserves the position of point. */) | |
1350 | (buffer, printflag, filename, unibyte, do_allow_print) | |
1076254d | 1351 | Lisp_Object buffer, printflag, filename, unibyte, do_allow_print; |
228d4b1c JA |
1352 | { |
1353 | int count = specpdl_ptr - specpdl; | |
1354 | Lisp_Object tem, buf; | |
1355 | ||
9391b698 | 1356 | if (NILP (buffer)) |
228d4b1c JA |
1357 | buf = Fcurrent_buffer (); |
1358 | else | |
9391b698 | 1359 | buf = Fget_buffer (buffer); |
dfdb645c | 1360 | if (NILP (buf)) |
13febd85 | 1361 | error ("No such buffer"); |
228d4b1c | 1362 | |
1076254d | 1363 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1364 | tem = Qsymbolp; |
1365 | else | |
1366 | tem = printflag; | |
13febd85 RS |
1367 | |
1368 | if (NILP (filename)) | |
1369 | filename = XBUFFER (buf)->filename; | |
1370 | ||
228d4b1c JA |
1371 | specbind (Qstandard_output, tem); |
1372 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1373 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
976350af | 1374 | readevalloop (buf, 0, filename, Feval, !NILP (printflag), unibyte, Qnil); |
cb09ab7a | 1375 | unbind_to (count, Qnil); |
228d4b1c JA |
1376 | |
1377 | return Qnil; | |
1378 | } | |
1379 | ||
976350af | 1380 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1381 | doc: /* Execute the region as Lisp code. |
1382 | When called from programs, expects two arguments, | |
1383 | giving starting and ending indices in the current buffer | |
1384 | of the text to be executed. | |
1385 | Programs can pass third argument PRINTFLAG which controls output: | |
1386 | nil means discard it; anything else is stream for printing it. | |
1387 | Also the fourth argument READ-FUNCTION, if non-nil, is used | |
1388 | instead of `read' to read each expression. It gets one argument | |
1389 | which is the input stream for reading characters. | |
1390 | ||
1391 | This function does not move point. */) | |
1392 | (start, end, printflag, read_function) | |
976350af | 1393 | Lisp_Object start, end, printflag, read_function; |
078e7b4a JB |
1394 | { |
1395 | int count = specpdl_ptr - specpdl; | |
ae321d28 RS |
1396 | Lisp_Object tem, cbuf; |
1397 | ||
1398 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1399 | |
265a9e55 | 1400 | if (NILP (printflag)) |
078e7b4a JB |
1401 | tem = Qsymbolp; |
1402 | else | |
1403 | tem = printflag; | |
1404 | specbind (Qstandard_output, tem); | |
1405 | ||
265a9e55 | 1406 | if (NILP (printflag)) |
078e7b4a JB |
1407 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
1408 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
1409 | ||
9391b698 EN |
1410 | /* This both uses start and checks its type. */ |
1411 | Fgoto_char (start); | |
1412 | Fnarrow_to_region (make_number (BEGV), end); | |
94e554db | 1413 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, |
976350af | 1414 | !NILP (printflag), Qnil, read_function); |
078e7b4a JB |
1415 | |
1416 | return unbind_to (count, Qnil); | |
1417 | } | |
1418 | ||
078e7b4a JB |
1419 | \f |
1420 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
5de38842 PJ |
1421 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1422 | If STREAM is nil, use the value of `standard-input' (which see). | |
1423 | STREAM or the value of `standard-input' may be: | |
1424 | a buffer (read from point and advance it) | |
1425 | a marker (read from where it points and advance it) | |
1426 | a function (call it with no arguments for each character, | |
1427 | call it with a char as argument to push a char back) | |
1428 | a string (takes text from string, starting at the beginning) | |
1429 | t (read text line using minibuffer and use it, or read from | |
1430 | standard input in batch mode). */) | |
1431 | (stream) | |
5be02dff | 1432 | Lisp_Object stream; |
078e7b4a JB |
1433 | { |
1434 | extern Lisp_Object Fread_minibuffer (); | |
1435 | ||
5be02dff KH |
1436 | if (NILP (stream)) |
1437 | stream = Vstandard_input; | |
1438 | if (EQ (stream, Qt)) | |
1439 | stream = Qread_char; | |
078e7b4a | 1440 | |
00a9a935 | 1441 | readchar_backlog = -1; |
17634846 | 1442 | new_backquote_flag = 0; |
4ad679f9 | 1443 | read_objects = Qnil; |
17634846 | 1444 | |
5be02dff | 1445 | if (EQ (stream, Qread_char)) |
078e7b4a | 1446 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1447 | |
5be02dff KH |
1448 | if (STRINGP (stream)) |
1449 | return Fcar (Fread_from_string (stream, Qnil, Qnil)); | |
078e7b4a | 1450 | |
5be02dff | 1451 | return read0 (stream); |
078e7b4a JB |
1452 | } |
1453 | ||
1454 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
5de38842 PJ |
1455 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1456 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
1457 | START and END optionally delimit a substring of STRING from which to read; | |
1458 | they default to 0 and (length STRING) respectively. */) | |
1459 | (string, start, end) | |
078e7b4a JB |
1460 | Lisp_Object string, start, end; |
1461 | { | |
1462 | int startval, endval; | |
1463 | Lisp_Object tem; | |
1464 | ||
b7826503 | 1465 | CHECK_STRING (string); |
078e7b4a | 1466 | |
265a9e55 | 1467 | if (NILP (end)) |
bed23cb2 | 1468 | endval = XSTRING (string)->size; |
078e7b4a | 1469 | else |
e28552a4 | 1470 | { |
b7826503 | 1471 | CHECK_NUMBER (end); |
8028e0ed | 1472 | endval = XINT (end); |
bed23cb2 | 1473 | if (endval < 0 || endval > XSTRING (string)->size) |
078e7b4a JB |
1474 | args_out_of_range (string, end); |
1475 | } | |
1476 | ||
265a9e55 | 1477 | if (NILP (start)) |
078e7b4a JB |
1478 | startval = 0; |
1479 | else | |
e28552a4 | 1480 | { |
b7826503 | 1481 | CHECK_NUMBER (start); |
8028e0ed | 1482 | startval = XINT (start); |
078e7b4a JB |
1483 | if (startval < 0 || startval > endval) |
1484 | args_out_of_range (string, start); | |
1485 | } | |
1486 | ||
1487 | read_from_string_index = startval; | |
bed23cb2 | 1488 | read_from_string_index_byte = string_char_to_byte (string, startval); |
078e7b4a JB |
1489 | read_from_string_limit = endval; |
1490 | ||
17634846 | 1491 | new_backquote_flag = 0; |
4ad679f9 | 1492 | read_objects = Qnil; |
17634846 | 1493 | |
078e7b4a | 1494 | tem = read0 (string); |
bed23cb2 | 1495 | return Fcons (tem, make_number (read_from_string_index)); |
078e7b4a JB |
1496 | } |
1497 | \f | |
6428369f KH |
1498 | /* Use this for recursive reads, in contexts where internal tokens |
1499 | are not allowed. */ | |
e28552a4 | 1500 | |
078e7b4a JB |
1501 | static Lisp_Object |
1502 | read0 (readcharfun) | |
1503 | Lisp_Object readcharfun; | |
1504 | { | |
1505 | register Lisp_Object val; | |
e28552a4 | 1506 | int c; |
078e7b4a | 1507 | |
17634846 | 1508 | val = read1 (readcharfun, &c, 0); |
6428369f | 1509 | if (c) |
93d75e4c RS |
1510 | Fsignal (Qinvalid_read_syntax, Fcons (Fmake_string (make_number (1), |
1511 | make_number (c)), | |
e28552a4 | 1512 | Qnil)); |
078e7b4a JB |
1513 | |
1514 | return val; | |
1515 | } | |
1516 | \f | |
1517 | static int read_buffer_size; | |
1518 | static char *read_buffer; | |
1519 | ||
fe0e03f3 KH |
1520 | /* Read multibyte form and return it as a character. C is a first |
1521 | byte of multibyte form, and rest of them are read from | |
1522 | READCHARFUN. */ | |
6f7f43d5 | 1523 | |
fe0e03f3 KH |
1524 | static int |
1525 | read_multibyte (c, readcharfun) | |
1526 | register int c; | |
1527 | Lisp_Object readcharfun; | |
1528 | { | |
1529 | /* We need the actual character code of this multibyte | |
1530 | characters. */ | |
449fea39 | 1531 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
fe0e03f3 | 1532 | int len = 0; |
0d5e5843 | 1533 | int bytes; |
fe0e03f3 KH |
1534 | |
1535 | str[len++] = c; | |
1536 | while ((c = READCHAR) >= 0xA0 | |
449fea39 | 1537 | && len < MAX_MULTIBYTE_LENGTH) |
fe0e03f3 KH |
1538 | str[len++] = c; |
1539 | UNREAD (c); | |
0d5e5843 KH |
1540 | if (UNIBYTE_STR_AS_MULTIBYTE_P (str, len, bytes)) |
1541 | return STRING_CHAR (str, len); | |
1542 | /* The byte sequence is not valid as multibyte. Unread all bytes | |
1543 | but the first one, and return the first byte. */ | |
1544 | while (--len > 0) | |
1545 | UNREAD (str[len]); | |
1546 | return str[0]; | |
fe0e03f3 KH |
1547 | } |
1548 | ||
f6f79b37 RS |
1549 | /* Read a \-escape sequence, assuming we already read the `\'. |
1550 | If the escape sequence forces unibyte, store 1 into *BYTEREP. | |
1551 | If the escape sequence forces multibyte, store 2 into *BYTEREP. | |
1552 | Otherwise store 0 into *BYTEREP. */ | |
6f7f43d5 | 1553 | |
078e7b4a | 1554 | static int |
f6f79b37 | 1555 | read_escape (readcharfun, stringp, byterep) |
078e7b4a | 1556 | Lisp_Object readcharfun; |
e7fc914b | 1557 | int stringp; |
f6f79b37 | 1558 | int *byterep; |
078e7b4a JB |
1559 | { |
1560 | register int c = READCHAR; | |
f6f79b37 RS |
1561 | |
1562 | *byterep = 0; | |
1563 | ||
078e7b4a JB |
1564 | switch (c) |
1565 | { | |
f3849f25 | 1566 | case -1: |
da3b886d | 1567 | end_of_file_error (); |
f3849f25 | 1568 | |
078e7b4a | 1569 | case 'a': |
265a9e55 | 1570 | return '\007'; |
078e7b4a JB |
1571 | case 'b': |
1572 | return '\b'; | |
f405a585 RS |
1573 | case 'd': |
1574 | return 0177; | |
078e7b4a JB |
1575 | case 'e': |
1576 | return 033; | |
1577 | case 'f': | |
1578 | return '\f'; | |
1579 | case 'n': | |
1580 | return '\n'; | |
1581 | case 'r': | |
1582 | return '\r'; | |
1583 | case 't': | |
1584 | return '\t'; | |
1585 | case 'v': | |
1586 | return '\v'; | |
1587 | case '\n': | |
1588 | return -1; | |
e28552a4 | 1589 | case ' ': |
e7fc914b KH |
1590 | if (stringp) |
1591 | return -1; | |
1592 | return ' '; | |
078e7b4a JB |
1593 | |
1594 | case 'M': | |
1595 | c = READCHAR; | |
1596 | if (c != '-') | |
1597 | error ("Invalid escape character syntax"); | |
1598 | c = READCHAR; | |
1599 | if (c == '\\') | |
f6f79b37 | 1600 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd | 1601 | return c | meta_modifier; |
f405a585 RS |
1602 | |
1603 | case 'S': | |
1604 | c = READCHAR; | |
1605 | if (c != '-') | |
1606 | error ("Invalid escape character syntax"); | |
1607 | c = READCHAR; | |
1608 | if (c == '\\') | |
f6f79b37 | 1609 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1610 | return c | shift_modifier; |
1611 | ||
1612 | case 'H': | |
1613 | c = READCHAR; | |
1614 | if (c != '-') | |
1615 | error ("Invalid escape character syntax"); | |
1616 | c = READCHAR; | |
1617 | if (c == '\\') | |
f6f79b37 | 1618 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1619 | return c | hyper_modifier; |
1620 | ||
1621 | case 'A': | |
1622 | c = READCHAR; | |
1623 | if (c != '-') | |
1624 | error ("Invalid escape character syntax"); | |
1625 | c = READCHAR; | |
1626 | if (c == '\\') | |
f6f79b37 | 1627 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1628 | return c | alt_modifier; |
1629 | ||
1630 | case 's': | |
1631 | c = READCHAR; | |
1632 | if (c != '-') | |
1633 | error ("Invalid escape character syntax"); | |
1634 | c = READCHAR; | |
1635 | if (c == '\\') | |
f6f79b37 | 1636 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd | 1637 | return c | super_modifier; |
078e7b4a JB |
1638 | |
1639 | case 'C': | |
1640 | c = READCHAR; | |
1641 | if (c != '-') | |
1642 | error ("Invalid escape character syntax"); | |
1643 | case '^': | |
1644 | c = READCHAR; | |
1645 | if (c == '\\') | |
f6f79b37 | 1646 | c = read_escape (readcharfun, 0, byterep); |
164d590d KH |
1647 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
1648 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
1649 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
1650 | return c | ctrl_modifier; | |
f405a585 RS |
1651 | /* ASCII control chars are made from letters (both cases), |
1652 | as well as the non-letters within 0100...0137. */ | |
1653 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1654 | return (c & (037 | ~0177)); | |
1655 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1656 | return (c & (037 | ~0177)); | |
078e7b4a | 1657 | else |
7bd279cd | 1658 | return c | ctrl_modifier; |
078e7b4a JB |
1659 | |
1660 | case '0': | |
1661 | case '1': | |
1662 | case '2': | |
1663 | case '3': | |
1664 | case '4': | |
1665 | case '5': | |
1666 | case '6': | |
1667 | case '7': | |
1668 | /* An octal escape, as in ANSI C. */ | |
1669 | { | |
1670 | register int i = c - '0'; | |
1671 | register int count = 0; | |
1672 | while (++count < 3) | |
1673 | { | |
1674 | if ((c = READCHAR) >= '0' && c <= '7') | |
1675 | { | |
1676 | i *= 8; | |
1677 | i += c - '0'; | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | UNREAD (c); | |
1682 | break; | |
1683 | } | |
1684 | } | |
f6f79b37 RS |
1685 | |
1686 | *byterep = 1; | |
078e7b4a JB |
1687 | return i; |
1688 | } | |
1689 | ||
1690 | case 'x': | |
1691 | /* A hex escape, as in ANSI C. */ | |
1692 | { | |
1693 | int i = 0; | |
1694 | while (1) | |
1695 | { | |
1696 | c = READCHAR; | |
1697 | if (c >= '0' && c <= '9') | |
1698 | { | |
1699 | i *= 16; | |
1700 | i += c - '0'; | |
1701 | } | |
1702 | else if ((c >= 'a' && c <= 'f') | |
1703 | || (c >= 'A' && c <= 'F')) | |
1704 | { | |
1705 | i *= 16; | |
1706 | if (c >= 'a' && c <= 'f') | |
1707 | i += c - 'a' + 10; | |
1708 | else | |
1709 | i += c - 'A' + 10; | |
1710 | } | |
1711 | else | |
1712 | { | |
1713 | UNREAD (c); | |
1714 | break; | |
1715 | } | |
1716 | } | |
f6f79b37 RS |
1717 | |
1718 | *byterep = 2; | |
078e7b4a JB |
1719 | return i; |
1720 | } | |
1721 | ||
1722 | default: | |
fe0e03f3 KH |
1723 | if (BASE_LEADING_CODE_P (c)) |
1724 | c = read_multibyte (c, readcharfun); | |
078e7b4a JB |
1725 | return c; |
1726 | } | |
1727 | } | |
1728 | ||
bf5d1a17 GM |
1729 | |
1730 | /* Read an integer in radix RADIX using READCHARFUN to read | |
1731 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
1732 | read error is signaled . Value is the integer read. Signals an | |
1733 | error if encountering invalid read syntax or if RADIX is out of | |
1734 | range. */ | |
1735 | ||
1736 | static Lisp_Object | |
1737 | read_integer (readcharfun, radix) | |
1738 | Lisp_Object readcharfun; | |
1739 | int radix; | |
1740 | { | |
5e37dc22 GM |
1741 | int ndigits = 0, invalid_p, c, sign = 0; |
1742 | EMACS_INT number = 0; | |
bf5d1a17 GM |
1743 | |
1744 | if (radix < 2 || radix > 36) | |
1745 | invalid_p = 1; | |
1746 | else | |
1747 | { | |
1748 | number = ndigits = invalid_p = 0; | |
1749 | sign = 1; | |
1750 | ||
1751 | c = READCHAR; | |
1752 | if (c == '-') | |
1753 | { | |
1754 | c = READCHAR; | |
1755 | sign = -1; | |
1756 | } | |
1757 | else if (c == '+') | |
1758 | c = READCHAR; | |
1759 | ||
1760 | while (c >= 0) | |
1761 | { | |
1762 | int digit; | |
1763 | ||
1764 | if (c >= '0' && c <= '9') | |
1765 | digit = c - '0'; | |
1766 | else if (c >= 'a' && c <= 'z') | |
1767 | digit = c - 'a' + 10; | |
1768 | else if (c >= 'A' && c <= 'Z') | |
1769 | digit = c - 'A' + 10; | |
1770 | else | |
b632fa48 GM |
1771 | { |
1772 | UNREAD (c); | |
1773 | break; | |
1774 | } | |
bf5d1a17 GM |
1775 | |
1776 | if (digit < 0 || digit >= radix) | |
1777 | invalid_p = 1; | |
1778 | ||
1779 | number = radix * number + digit; | |
1780 | ++ndigits; | |
1781 | c = READCHAR; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | if (ndigits == 0 || invalid_p) | |
1786 | { | |
1787 | char buf[50]; | |
1788 | sprintf (buf, "integer, radix %d", radix); | |
1789 | Fsignal (Qinvalid_read_syntax, Fcons (build_string (buf), Qnil)); | |
1790 | } | |
1791 | ||
1792 | return make_number (sign * number); | |
1793 | } | |
1794 | ||
1795 | ||
a742d646 GM |
1796 | /* Convert unibyte text in read_buffer to multibyte. |
1797 | ||
1798 | Initially, *P is a pointer after the end of the unibyte text, and | |
1799 | the pointer *END points after the end of read_buffer. | |
1800 | ||
1801 | If read_buffer doesn't have enough room to hold the result | |
1802 | of the conversion, reallocate it and adjust *P and *END. | |
1803 | ||
1804 | At the end, make *P point after the result of the conversion, and | |
1805 | return in *NCHARS the number of characters in the converted | |
1806 | text. */ | |
1807 | ||
1808 | static void | |
1809 | to_multibyte (p, end, nchars) | |
1810 | char **p, **end; | |
1811 | int *nchars; | |
1812 | { | |
1813 | int nbytes; | |
1814 | ||
1815 | parse_str_as_multibyte (read_buffer, *p - read_buffer, &nbytes, nchars); | |
b4a3be43 | 1816 | if (read_buffer_size < 2 * nbytes) |
a742d646 GM |
1817 | { |
1818 | int offset = *p - read_buffer; | |
fe957e65 | 1819 | read_buffer_size = 2 * max (read_buffer_size, nbytes); |
a742d646 GM |
1820 | read_buffer = (char *) xrealloc (read_buffer, read_buffer_size); |
1821 | *p = read_buffer + offset; | |
1822 | *end = read_buffer + read_buffer_size; | |
1823 | } | |
1824 | ||
1825 | if (nbytes != *nchars) | |
1826 | nbytes = str_as_multibyte (read_buffer, read_buffer_size, | |
1827 | *p - read_buffer, nchars); | |
1828 | ||
1829 | *p = read_buffer + nbytes; | |
1830 | } | |
1831 | ||
1832 | ||
6428369f KH |
1833 | /* If the next token is ')' or ']' or '.', we store that character |
1834 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
1835 | zero in *PCH and we read and return one lisp object. |
1836 | ||
1837 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
1838 | ||
078e7b4a | 1839 | static Lisp_Object |
17634846 | 1840 | read1 (readcharfun, pch, first_in_list) |
078e7b4a | 1841 | register Lisp_Object readcharfun; |
e28552a4 | 1842 | int *pch; |
17634846 | 1843 | int first_in_list; |
078e7b4a JB |
1844 | { |
1845 | register int c; | |
4ad679f9 EN |
1846 | int uninterned_symbol = 0; |
1847 | ||
6428369f | 1848 | *pch = 0; |
078e7b4a JB |
1849 | |
1850 | retry: | |
1851 | ||
1852 | c = READCHAR; | |
9c97398c GM |
1853 | if (c < 0) |
1854 | end_of_file_error (); | |
078e7b4a JB |
1855 | |
1856 | switch (c) | |
1857 | { | |
1858 | case '(': | |
1859 | return read_list (0, readcharfun); | |
1860 | ||
1861 | case '[': | |
c15cfd1f | 1862 | return read_vector (readcharfun, 0); |
078e7b4a JB |
1863 | |
1864 | case ')': | |
1865 | case ']': | |
078e7b4a | 1866 | { |
6428369f KH |
1867 | *pch = c; |
1868 | return Qnil; | |
078e7b4a JB |
1869 | } |
1870 | ||
1871 | case '#': | |
200f684e | 1872 | c = READCHAR; |
c2390933 RS |
1873 | if (c == '^') |
1874 | { | |
1875 | c = READCHAR; | |
1876 | if (c == '[') | |
1877 | { | |
1878 | Lisp_Object tmp; | |
c15cfd1f | 1879 | tmp = read_vector (readcharfun, 0); |
c2390933 RS |
1880 | if (XVECTOR (tmp)->size < CHAR_TABLE_STANDARD_SLOTS |
1881 | || XVECTOR (tmp)->size > CHAR_TABLE_STANDARD_SLOTS + 10) | |
1882 | error ("Invalid size char-table"); | |
1883 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); | |
3701b5de | 1884 | XCHAR_TABLE (tmp)->top = Qt; |
c2390933 RS |
1885 | return tmp; |
1886 | } | |
3701b5de KH |
1887 | else if (c == '^') |
1888 | { | |
1889 | c = READCHAR; | |
1890 | if (c == '[') | |
1891 | { | |
1892 | Lisp_Object tmp; | |
c15cfd1f | 1893 | tmp = read_vector (readcharfun, 0); |
3701b5de KH |
1894 | if (XVECTOR (tmp)->size != SUB_CHAR_TABLE_STANDARD_SLOTS) |
1895 | error ("Invalid size char-table"); | |
1896 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); | |
1897 | XCHAR_TABLE (tmp)->top = Qnil; | |
1898 | return tmp; | |
1899 | } | |
1900 | Fsignal (Qinvalid_read_syntax, | |
1901 | Fcons (make_string ("#^^", 3), Qnil)); | |
1902 | } | |
c2390933 RS |
1903 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#^", 2), Qnil)); |
1904 | } | |
1905 | if (c == '&') | |
1906 | { | |
1907 | Lisp_Object length; | |
1908 | length = read1 (readcharfun, pch, first_in_list); | |
1909 | c = READCHAR; | |
1910 | if (c == '"') | |
1911 | { | |
1912 | Lisp_Object tmp, val; | |
90ed3ec5 | 1913 | int size_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) |
68be917d | 1914 | / BITS_PER_CHAR); |
c2390933 RS |
1915 | |
1916 | UNREAD (c); | |
1917 | tmp = read1 (readcharfun, pch, first_in_list); | |
90ed3ec5 RS |
1918 | if (size_in_chars != XSTRING (tmp)->size |
1919 | /* We used to print 1 char too many | |
1920 | when the number of bits was a multiple of 8. | |
1921 | Accept such input in case it came from an old version. */ | |
1922 | && ! (XFASTINT (length) | |
1923 | == (XSTRING (tmp)->size - 1) * BITS_PER_CHAR)) | |
c2390933 | 1924 | Fsignal (Qinvalid_read_syntax, |
ec3bbd7d | 1925 | Fcons (make_string ("#&...", 5), Qnil)); |
c2390933 RS |
1926 | |
1927 | val = Fmake_bool_vector (length, Qnil); | |
1928 | bcopy (XSTRING (tmp)->data, XBOOL_VECTOR (val)->data, | |
1929 | size_in_chars); | |
67d3b149 EZ |
1930 | /* Clear the extraneous bits in the last byte. */ |
1931 | if (XINT (length) != size_in_chars * BITS_PER_CHAR) | |
1932 | XBOOL_VECTOR (val)->data[size_in_chars - 1] | |
1933 | &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1; | |
c2390933 RS |
1934 | return val; |
1935 | } | |
ec3bbd7d | 1936 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#&...", 5), |
039dc30b | 1937 | Qnil)); |
c2390933 | 1938 | } |
200f684e RS |
1939 | if (c == '[') |
1940 | { | |
1941 | /* Accept compiled functions at read-time so that we don't have to | |
1942 | build them using function calls. */ | |
748ef62f | 1943 | Lisp_Object tmp; |
c15cfd1f | 1944 | tmp = read_vector (readcharfun, 1); |
748ef62f RS |
1945 | return Fmake_byte_code (XVECTOR (tmp)->size, |
1946 | XVECTOR (tmp)->contents); | |
200f684e | 1947 | } |
748ef62f RS |
1948 | if (c == '(') |
1949 | { | |
1950 | Lisp_Object tmp; | |
1951 | struct gcpro gcpro1; | |
e28552a4 | 1952 | int ch; |
748ef62f RS |
1953 | |
1954 | /* Read the string itself. */ | |
17634846 | 1955 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 1956 | if (ch != 0 || !STRINGP (tmp)) |
748ef62f RS |
1957 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
1958 | GCPRO1 (tmp); | |
1959 | /* Read the intervals and their properties. */ | |
1960 | while (1) | |
1961 | { | |
1962 | Lisp_Object beg, end, plist; | |
1963 | ||
17634846 | 1964 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 1965 | end = plist = Qnil; |
6428369f KH |
1966 | if (ch == ')') |
1967 | break; | |
1968 | if (ch == 0) | |
17634846 | 1969 | end = read1 (readcharfun, &ch, 0); |
6428369f | 1970 | if (ch == 0) |
17634846 | 1971 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 1972 | if (ch) |
748ef62f | 1973 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
1974 | Fcons (build_string ("invalid string property list"), |
1975 | Qnil)); | |
748ef62f RS |
1976 | Fset_text_properties (beg, end, plist, tmp); |
1977 | } | |
1978 | UNGCPRO; | |
1979 | return tmp; | |
1980 | } | |
339ee979 | 1981 | |
20ea2964 RS |
1982 | /* #@NUMBER is used to skip NUMBER following characters. |
1983 | That's used in .elc files to skip over doc strings | |
1984 | and function definitions. */ | |
1985 | if (c == '@') | |
1986 | { | |
1987 | int i, nskip = 0; | |
1988 | ||
1989 | /* Read a decimal integer. */ | |
1990 | while ((c = READCHAR) >= 0 | |
1991 | && c >= '0' && c <= '9') | |
1992 | { | |
1993 | nskip *= 10; | |
1994 | nskip += c - '0'; | |
1995 | } | |
1996 | if (c >= 0) | |
1997 | UNREAD (c); | |
1998 | ||
b2a30870 RS |
1999 | if (load_force_doc_strings && EQ (readcharfun, Qget_file_char)) |
2000 | { | |
2001 | /* If we are supposed to force doc strings into core right now, | |
2002 | record the last string that we skipped, | |
2003 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2004 | |
2005 | /* But first exchange saved_doc_string | |
2006 | with prev_saved_doc_string, so we save two strings. */ | |
2007 | { | |
2008 | char *temp = saved_doc_string; | |
2009 | int temp_size = saved_doc_string_size; | |
68c45bf0 | 2010 | file_offset temp_pos = saved_doc_string_position; |
c15cfd1f RS |
2011 | int temp_len = saved_doc_string_length; |
2012 | ||
2013 | saved_doc_string = prev_saved_doc_string; | |
2014 | saved_doc_string_size = prev_saved_doc_string_size; | |
2015 | saved_doc_string_position = prev_saved_doc_string_position; | |
2016 | saved_doc_string_length = prev_saved_doc_string_length; | |
2017 | ||
2018 | prev_saved_doc_string = temp; | |
2019 | prev_saved_doc_string_size = temp_size; | |
2020 | prev_saved_doc_string_position = temp_pos; | |
2021 | prev_saved_doc_string_length = temp_len; | |
2022 | } | |
2023 | ||
b2a30870 RS |
2024 | if (saved_doc_string_size == 0) |
2025 | { | |
2026 | saved_doc_string_size = nskip + 100; | |
11938f10 | 2027 | saved_doc_string = (char *) xmalloc (saved_doc_string_size); |
b2a30870 RS |
2028 | } |
2029 | if (nskip > saved_doc_string_size) | |
2030 | { | |
2031 | saved_doc_string_size = nskip + 100; | |
11938f10 KH |
2032 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
2033 | saved_doc_string_size); | |
b2a30870 RS |
2034 | } |
2035 | ||
68c45bf0 | 2036 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2037 | |
2038 | /* Copy that many characters into saved_doc_string. */ | |
2039 | for (i = 0; i < nskip && c >= 0; i++) | |
2040 | saved_doc_string[i] = c = READCHAR; | |
2041 | ||
2042 | saved_doc_string_length = i; | |
2043 | } | |
2044 | else | |
b2a30870 RS |
2045 | { |
2046 | /* Skip that many characters. */ | |
2047 | for (i = 0; i < nskip && c >= 0; i++) | |
2048 | c = READCHAR; | |
2049 | } | |
d49f0c1a | 2050 | |
20ea2964 RS |
2051 | goto retry; |
2052 | } | |
2053 | if (c == '$') | |
2054 | return Vload_file_name; | |
2b6cae0c RS |
2055 | if (c == '\'') |
2056 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2057 | /* #:foo is the uninterned symbol named foo. */ |
2058 | if (c == ':') | |
2059 | { | |
2060 | uninterned_symbol = 1; | |
2061 | c = READCHAR; | |
2062 | goto default_label; | |
2063 | } | |
2064 | /* Reader forms that can reuse previously read objects. */ | |
2065 | if (c >= '0' && c <= '9') | |
2066 | { | |
2067 | int n = 0; | |
2068 | Lisp_Object tem; | |
2b6cae0c | 2069 | |
4ad679f9 EN |
2070 | /* Read a non-negative integer. */ |
2071 | while (c >= '0' && c <= '9') | |
2072 | { | |
2073 | n *= 10; | |
2074 | n += c - '0'; | |
2075 | c = READCHAR; | |
2076 | } | |
2077 | /* #n=object returns object, but associates it with n for #n#. */ | |
2078 | if (c == '=') | |
2079 | { | |
9e062b6c RS |
2080 | /* Make a placeholder for #n# to use temporarily */ |
2081 | Lisp_Object placeholder; | |
2082 | Lisp_Object cell; | |
2083 | ||
2084 | placeholder = Fcons(Qnil, Qnil); | |
2085 | cell = Fcons (make_number (n), placeholder); | |
2086 | read_objects = Fcons (cell, read_objects); | |
2087 | ||
2088 | /* Read the object itself. */ | |
4ad679f9 | 2089 | tem = read0 (readcharfun); |
9e062b6c RS |
2090 | |
2091 | /* Now put it everywhere the placeholder was... */ | |
2092 | substitute_object_in_subtree (tem, placeholder); | |
2093 | ||
2094 | /* ...and #n# will use the real value from now on. */ | |
2095 | Fsetcdr (cell, tem); | |
2096 | ||
4ad679f9 EN |
2097 | return tem; |
2098 | } | |
2099 | /* #n# returns a previously read object. */ | |
2100 | if (c == '#') | |
2101 | { | |
2102 | tem = Fassq (make_number (n), read_objects); | |
2103 | if (CONSP (tem)) | |
2104 | return XCDR (tem); | |
2105 | /* Fall through to error message. */ | |
2106 | } | |
bf5d1a17 GM |
2107 | else if (c == 'r' || c == 'R') |
2108 | return read_integer (readcharfun, n); | |
2109 | ||
4ad679f9 EN |
2110 | /* Fall through to error message. */ |
2111 | } | |
bf5d1a17 GM |
2112 | else if (c == 'x' || c == 'X') |
2113 | return read_integer (readcharfun, 16); | |
2114 | else if (c == 'o' || c == 'O') | |
2115 | return read_integer (readcharfun, 8); | |
2116 | else if (c == 'b' || c == 'B') | |
2117 | return read_integer (readcharfun, 2); | |
20ea2964 | 2118 | |
200f684e | 2119 | UNREAD (c); |
748ef62f | 2120 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
2121 | |
2122 | case ';': | |
2123 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2124 | goto retry; | |
2125 | ||
2126 | case '\'': | |
2127 | { | |
2128 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2129 | } | |
2130 | ||
17634846 RS |
2131 | case '`': |
2132 | if (first_in_list) | |
2133 | goto default_label; | |
2134 | else | |
2135 | { | |
2136 | Lisp_Object value; | |
2137 | ||
0ffbbdeb | 2138 | new_backquote_flag++; |
17634846 | 2139 | value = read0 (readcharfun); |
0ffbbdeb | 2140 | new_backquote_flag--; |
17634846 RS |
2141 | |
2142 | return Fcons (Qbackquote, Fcons (value, Qnil)); | |
2143 | } | |
2144 | ||
2145 | case ',': | |
2146 | if (new_backquote_flag) | |
2147 | { | |
2148 | Lisp_Object comma_type = Qnil; | |
2149 | Lisp_Object value; | |
2150 | int ch = READCHAR; | |
2151 | ||
2152 | if (ch == '@') | |
2153 | comma_type = Qcomma_at; | |
2154 | else if (ch == '.') | |
2155 | comma_type = Qcomma_dot; | |
2156 | else | |
2157 | { | |
2158 | if (ch >= 0) UNREAD (ch); | |
2159 | comma_type = Qcomma; | |
2160 | } | |
2161 | ||
0ffbbdeb | 2162 | new_backquote_flag--; |
17634846 | 2163 | value = read0 (readcharfun); |
0ffbbdeb | 2164 | new_backquote_flag++; |
17634846 RS |
2165 | return Fcons (comma_type, Fcons (value, Qnil)); |
2166 | } | |
2167 | else | |
2168 | goto default_label; | |
2169 | ||
078e7b4a JB |
2170 | case '?': |
2171 | { | |
f6f79b37 RS |
2172 | int discard; |
2173 | ||
078e7b4a | 2174 | c = READCHAR; |
9c97398c GM |
2175 | if (c < 0) |
2176 | end_of_file_error (); | |
078e7b4a JB |
2177 | |
2178 | if (c == '\\') | |
f6f79b37 | 2179 | c = read_escape (readcharfun, 0, &discard); |
fe0e03f3 KH |
2180 | else if (BASE_LEADING_CODE_P (c)) |
2181 | c = read_multibyte (c, readcharfun); | |
078e7b4a | 2182 | |
6f7f43d5 | 2183 | return make_number (c); |
078e7b4a JB |
2184 | } |
2185 | ||
00a9a935 | 2186 | case '"': |
078e7b4a | 2187 | { |
a742d646 GM |
2188 | char *p = read_buffer; |
2189 | char *end = read_buffer + read_buffer_size; | |
078e7b4a | 2190 | register int c; |
5150eeec RS |
2191 | /* 1 if we saw an escape sequence specifying |
2192 | a multibyte character, or a multibyte character. */ | |
e7fc914b | 2193 | int force_multibyte = 0; |
5150eeec | 2194 | /* 1 if we saw an escape sequence specifying |
e7fc914b KH |
2195 | a single-byte character. */ |
2196 | int force_singlebyte = 0; | |
5150eeec RS |
2197 | /* 1 if read_buffer contains multibyte text now. */ |
2198 | int is_multibyte = 0; | |
078e7b4a | 2199 | int cancel = 0; |
5150eeec | 2200 | int nchars = 0; |
078e7b4a JB |
2201 | |
2202 | while ((c = READCHAR) >= 0 | |
2203 | && c != '\"') | |
2204 | { | |
449fea39 | 2205 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2206 | { |
5d65df0d GM |
2207 | int offset = p - read_buffer; |
2208 | read_buffer = (char *) xrealloc (read_buffer, | |
2209 | read_buffer_size *= 2); | |
2210 | p = read_buffer + offset; | |
078e7b4a JB |
2211 | end = read_buffer + read_buffer_size; |
2212 | } | |
bed23cb2 | 2213 | |
078e7b4a | 2214 | if (c == '\\') |
03e88613 | 2215 | { |
f6f79b37 RS |
2216 | int byterep; |
2217 | ||
2218 | c = read_escape (readcharfun, 1, &byterep); | |
bed23cb2 RS |
2219 | |
2220 | /* C is -1 if \ newline has just been seen */ | |
2221 | if (c == -1) | |
03e88613 | 2222 | { |
bed23cb2 RS |
2223 | if (p == read_buffer) |
2224 | cancel = 1; | |
03e88613 RS |
2225 | continue; |
2226 | } | |
bed23cb2 | 2227 | |
f6f79b37 | 2228 | if (byterep == 1) |
e7fc914b | 2229 | force_singlebyte = 1; |
f6f79b37 RS |
2230 | else if (byterep == 2) |
2231 | force_multibyte = 1; | |
03e88613 | 2232 | } |
6f7f43d5 | 2233 | |
5150eeec RS |
2234 | /* A character that must be multibyte forces multibyte. */ |
2235 | if (! SINGLE_BYTE_CHAR_P (c & ~CHAR_MODIFIER_MASK)) | |
2236 | force_multibyte = 1; | |
2237 | ||
2238 | /* If we just discovered the need to be multibyte, | |
2239 | convert the text accumulated thus far. */ | |
2240 | if (force_multibyte && ! is_multibyte) | |
078e7b4a | 2241 | { |
5150eeec RS |
2242 | is_multibyte = 1; |
2243 | to_multibyte (&p, &end, &nchars); | |
078e7b4a | 2244 | } |
988c2f83 | 2245 | |
5150eeec RS |
2246 | /* Allow `\C- ' and `\C-?'. */ |
2247 | if (c == (CHAR_CTL | ' ')) | |
2248 | c = 0; | |
2249 | else if (c == (CHAR_CTL | '?')) | |
2250 | c = 127; | |
164d590d | 2251 | |
5150eeec RS |
2252 | if (c & CHAR_SHIFT) |
2253 | { | |
2254 | /* Shift modifier is valid only with [A-Za-z]. */ | |
2255 | if ((c & 0377) >= 'A' && (c & 0377) <= 'Z') | |
2256 | c &= ~CHAR_SHIFT; | |
2257 | else if ((c & 0377) >= 'a' && (c & 0377) <= 'z') | |
2258 | c = (c & ~CHAR_SHIFT) - ('a' - 'A'); | |
f943104a | 2259 | } |
5150eeec RS |
2260 | |
2261 | if (c & CHAR_META) | |
2262 | /* Move the meta bit to the right place for a string. */ | |
2263 | c = (c & ~CHAR_META) | 0x80; | |
2264 | if (c & CHAR_MODIFIER_MASK) | |
2265 | error ("Invalid modifier in string"); | |
2266 | ||
2267 | if (is_multibyte) | |
2268 | p += CHAR_STRING (c, p); | |
2269 | else | |
2270 | *p++ = c; | |
2271 | ||
2272 | nchars++; | |
078e7b4a | 2273 | } |
5150eeec | 2274 | |
6f7f43d5 | 2275 | if (c < 0) |
9c97398c | 2276 | end_of_file_error (); |
078e7b4a JB |
2277 | |
2278 | /* If purifying, and string starts with \ newline, | |
2279 | return zero instead. This is for doc strings | |
08564963 | 2280 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 2281 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2282 | return make_number (0); |
2283 | ||
5150eeec RS |
2284 | if (is_multibyte || force_singlebyte) |
2285 | ; | |
94e554db RS |
2286 | else if (load_convert_to_unibyte) |
2287 | { | |
2288 | Lisp_Object string; | |
a742d646 | 2289 | to_multibyte (&p, &end, &nchars); |
94e554db RS |
2290 | if (p - read_buffer != nchars) |
2291 | { | |
2292 | string = make_multibyte_string (read_buffer, nchars, | |
2293 | p - read_buffer); | |
2294 | return Fstring_make_unibyte (string); | |
2295 | } | |
5150eeec RS |
2296 | /* We can make a unibyte string directly. */ |
2297 | is_multibyte = 0; | |
94e554db | 2298 | } |
8db9dc66 RS |
2299 | else if (EQ (readcharfun, Qget_file_char) |
2300 | || EQ (readcharfun, Qlambda)) | |
a742d646 GM |
2301 | { |
2302 | /* Nowadays, reading directly from a file is used only for | |
2303 | compiled Emacs Lisp files, and those always use the | |
2304 | Emacs internal encoding. Meanwhile, Qlambda is used | |
2305 | for reading dynamic byte code (compiled with | |
81a268b4 RS |
2306 | byte-compile-dynamic = t). So make the string multibyte |
2307 | if the string contains any multibyte sequences. | |
2308 | (to_multibyte is a no-op if not.) */ | |
a742d646 | 2309 | to_multibyte (&p, &end, &nchars); |
81a268b4 | 2310 | is_multibyte = (p - read_buffer) != nchars; |
a742d646 | 2311 | } |
e28552a4 | 2312 | else |
bed23cb2 RS |
2313 | /* In all other cases, if we read these bytes as |
2314 | separate characters, treat them as separate characters now. */ | |
5150eeec | 2315 | ; |
e7fc914b KH |
2316 | |
2317 | if (read_pure) | |
491f16a2 | 2318 | return make_pure_string (read_buffer, nchars, p - read_buffer, |
5150eeec | 2319 | is_multibyte); |
491f16a2 | 2320 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
5150eeec | 2321 | is_multibyte); |
078e7b4a JB |
2322 | } |
2323 | ||
109d300c JB |
2324 | case '.': |
2325 | { | |
109d300c JB |
2326 | int next_char = READCHAR; |
2327 | UNREAD (next_char); | |
2328 | ||
035eec48 GM |
2329 | if (next_char <= 040 |
2330 | || index ("\"'`,(", next_char)) | |
109d300c | 2331 | { |
6428369f KH |
2332 | *pch = c; |
2333 | return Qnil; | |
109d300c JB |
2334 | } |
2335 | ||
2336 | /* Otherwise, we fall through! Note that the atom-reading loop | |
2337 | below will now loop at least once, assuring that we will not | |
2338 | try to UNREAD two characters in a row. */ | |
2339 | } | |
078e7b4a | 2340 | default: |
17634846 | 2341 | default_label: |
078e7b4a JB |
2342 | if (c <= 040) goto retry; |
2343 | { | |
38404229 | 2344 | char *p = read_buffer; |
481c6336 | 2345 | int quoted = 0; |
078e7b4a JB |
2346 | |
2347 | { | |
38404229 | 2348 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 2349 | |
6f7f43d5 | 2350 | while (c > 040 |
38404229 | 2351 | && !(c == '\"' || c == '\'' || c == ';' |
6f7f43d5 | 2352 | || c == '(' || c == ')' |
38404229 | 2353 | || c == '[' || c == ']' || c == '#')) |
078e7b4a | 2354 | { |
449fea39 | 2355 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2356 | { |
5d65df0d GM |
2357 | int offset = p - read_buffer; |
2358 | read_buffer = (char *) xrealloc (read_buffer, | |
2359 | read_buffer_size *= 2); | |
2360 | p = read_buffer + offset; | |
078e7b4a JB |
2361 | end = read_buffer + read_buffer_size; |
2362 | } | |
38404229 | 2363 | |
078e7b4a | 2364 | if (c == '\\') |
481c6336 RS |
2365 | { |
2366 | c = READCHAR; | |
4ab11c09 GM |
2367 | if (c == -1) |
2368 | end_of_file_error (); | |
481c6336 RS |
2369 | quoted = 1; |
2370 | } | |
6f7f43d5 | 2371 | |
bed23cb2 | 2372 | if (! SINGLE_BYTE_CHAR_P (c)) |
449fea39 | 2373 | p += CHAR_STRING (c, p); |
bed23cb2 RS |
2374 | else |
2375 | *p++ = c; | |
6f7f43d5 | 2376 | |
078e7b4a JB |
2377 | c = READCHAR; |
2378 | } | |
2379 | ||
2380 | if (p == end) | |
2381 | { | |
5d65df0d GM |
2382 | int offset = p - read_buffer; |
2383 | read_buffer = (char *) xrealloc (read_buffer, | |
2384 | read_buffer_size *= 2); | |
2385 | p = read_buffer + offset; | |
2386 | end = read_buffer + read_buffer_size; | |
078e7b4a JB |
2387 | } |
2388 | *p = 0; | |
2389 | if (c >= 0) | |
2390 | UNREAD (c); | |
2391 | } | |
2392 | ||
4ad679f9 | 2393 | if (!quoted && !uninterned_symbol) |
481c6336 RS |
2394 | { |
2395 | register char *p1; | |
2396 | register Lisp_Object val; | |
2397 | p1 = read_buffer; | |
2398 | if (*p1 == '+' || *p1 == '-') p1++; | |
2399 | /* Is it an integer? */ | |
2400 | if (p1 != p) | |
2401 | { | |
2402 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
481c6336 RS |
2403 | /* Integers can have trailing decimal points. */ |
2404 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
481c6336 RS |
2405 | if (p1 == p) |
2406 | /* It is an integer. */ | |
2407 | { | |
481c6336 RS |
2408 | if (p1[-1] == '.') |
2409 | p1[-1] = '\0'; | |
faca07fb RS |
2410 | if (sizeof (int) == sizeof (EMACS_INT)) |
2411 | XSETINT (val, atoi (read_buffer)); | |
2412 | else if (sizeof (long) == sizeof (EMACS_INT)) | |
2413 | XSETINT (val, atol (read_buffer)); | |
2414 | else | |
2415 | abort (); | |
481c6336 RS |
2416 | return val; |
2417 | } | |
2418 | } | |
481c6336 | 2419 | if (isfloat_string (read_buffer)) |
eb659c41 | 2420 | { |
a8972052 PE |
2421 | /* Compute NaN and infinities using 0.0 in a variable, |
2422 | to cope with compilers that think they are smarter | |
5e24a1f7 | 2423 | than we are. */ |
3c329963 | 2424 | double zero = 0.0; |
a8972052 PE |
2425 | |
2426 | double value; | |
2427 | ||
2428 | /* Negate the value ourselves. This treats 0, NaNs, | |
2429 | and infinity properly on IEEE floating point hosts, | |
2430 | and works around a common bug where atof ("-0.0") | |
2431 | drops the sign. */ | |
2432 | int negative = read_buffer[0] == '-'; | |
2433 | ||
2434 | /* The only way p[-1] can be 'F' or 'N', after isfloat_string | |
eb659c41 | 2435 | returns 1, is if the input ends in e+INF or e+NaN. */ |
a8972052 | 2436 | switch (p[-1]) |
eb659c41 | 2437 | { |
a8972052 PE |
2438 | case 'F': |
2439 | value = 1.0 / zero; | |
2440 | break; | |
2441 | case 'N': | |
2442 | value = zero / zero; | |
2443 | break; | |
2444 | default: | |
2445 | value = atof (read_buffer + negative); | |
2446 | break; | |
eb659c41 | 2447 | } |
a8972052 PE |
2448 | |
2449 | return make_float (negative ? - value : value); | |
eb659c41 | 2450 | } |
481c6336 | 2451 | } |
078e7b4a | 2452 | |
4ad679f9 EN |
2453 | if (uninterned_symbol) |
2454 | return make_symbol (read_buffer); | |
2455 | else | |
2456 | return intern (read_buffer); | |
078e7b4a JB |
2457 | } |
2458 | } | |
2459 | } | |
2460 | \f | |
9e062b6c RS |
2461 | |
2462 | /* List of nodes we've seen during substitute_object_in_subtree. */ | |
2463 | static Lisp_Object seen_list; | |
2464 | ||
2465 | static void | |
2466 | substitute_object_in_subtree (object, placeholder) | |
2467 | Lisp_Object object; | |
2468 | Lisp_Object placeholder; | |
2469 | { | |
2470 | Lisp_Object check_object; | |
2471 | ||
2472 | /* We haven't seen any objects when we start. */ | |
2473 | seen_list = Qnil; | |
2474 | ||
2475 | /* Make all the substitutions. */ | |
2476 | check_object | |
2477 | = substitute_object_recurse (object, placeholder, object); | |
2478 | ||
2479 | /* Clear seen_list because we're done with it. */ | |
2480 | seen_list = Qnil; | |
2481 | ||
2482 | /* The returned object here is expected to always eq the | |
2483 | original. */ | |
2484 | if (!EQ (check_object, object)) | |
2485 | error ("Unexpected mutation error in reader"); | |
2486 | } | |
2487 | ||
2488 | /* Feval doesn't get called from here, so no gc protection is needed. */ | |
2489 | #define SUBSTITUTE(get_val, set_val) \ | |
2490 | { \ | |
2491 | Lisp_Object old_value = get_val; \ | |
2492 | Lisp_Object true_value \ | |
2493 | = substitute_object_recurse (object, placeholder,\ | |
2494 | old_value); \ | |
2495 | \ | |
2496 | if (!EQ (old_value, true_value)) \ | |
2497 | { \ | |
2498 | set_val; \ | |
2499 | } \ | |
2500 | } | |
2501 | ||
2502 | static Lisp_Object | |
2503 | substitute_object_recurse (object, placeholder, subtree) | |
2504 | Lisp_Object object; | |
2505 | Lisp_Object placeholder; | |
2506 | Lisp_Object subtree; | |
2507 | { | |
2508 | /* If we find the placeholder, return the target object. */ | |
2509 | if (EQ (placeholder, subtree)) | |
2510 | return object; | |
2511 | ||
2512 | /* If we've been to this node before, don't explore it again. */ | |
2513 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) | |
2514 | return subtree; | |
2515 | ||
2516 | /* If this node can be the entry point to a cycle, remember that | |
2517 | we've seen it. It can only be such an entry point if it was made | |
2518 | by #n=, which means that we can find it as a value in | |
2519 | read_objects. */ | |
2520 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
2521 | seen_list = Fcons (subtree, seen_list); | |
2522 | ||
2523 | /* Recurse according to subtree's type. | |
2524 | Every branch must return a Lisp_Object. */ | |
2525 | switch (XTYPE (subtree)) | |
2526 | { | |
2527 | case Lisp_Vectorlike: | |
2528 | { | |
2529 | int i; | |
7c752c80 | 2530 | int length = XINT (Flength(subtree)); |
9e062b6c RS |
2531 | for (i = 0; i < length; i++) |
2532 | { | |
2533 | Lisp_Object idx = make_number (i); | |
2534 | SUBSTITUTE (Faref (subtree, idx), | |
2535 | Faset (subtree, idx, true_value)); | |
2536 | } | |
2537 | return subtree; | |
2538 | } | |
2539 | ||
2540 | case Lisp_Cons: | |
2541 | { | |
2542 | SUBSTITUTE (Fcar_safe (subtree), | |
e61b9b87 | 2543 | Fsetcar (subtree, true_value)); |
9e062b6c | 2544 | SUBSTITUTE (Fcdr_safe (subtree), |
e61b9b87 | 2545 | Fsetcdr (subtree, true_value)); |
9e062b6c RS |
2546 | return subtree; |
2547 | } | |
2548 | ||
9e062b6c RS |
2549 | case Lisp_String: |
2550 | { | |
2551 | /* Check for text properties in each interval. | |
e61b9b87 | 2552 | substitute_in_interval contains part of the logic. */ |
9e062b6c RS |
2553 | |
2554 | INTERVAL root_interval = XSTRING (subtree)->intervals; | |
2555 | Lisp_Object arg = Fcons (object, placeholder); | |
2556 | ||
0d74b006 SM |
2557 | traverse_intervals_noorder (root_interval, |
2558 | &substitute_in_interval, arg); | |
9e062b6c RS |
2559 | |
2560 | return subtree; | |
2561 | } | |
9e062b6c RS |
2562 | |
2563 | /* Other types don't recurse any further. */ | |
2564 | default: | |
2565 | return subtree; | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | /* Helper function for substitute_object_recurse. */ | |
2570 | static void | |
2571 | substitute_in_interval (interval, arg) | |
2572 | INTERVAL interval; | |
2573 | Lisp_Object arg; | |
2574 | { | |
2575 | Lisp_Object object = Fcar (arg); | |
2576 | Lisp_Object placeholder = Fcdr (arg); | |
2577 | ||
2578 | SUBSTITUTE(interval->plist, interval->plist = true_value); | |
2579 | } | |
2580 | ||
2581 | \f | |
078e7b4a JB |
2582 | #define LEAD_INT 1 |
2583 | #define DOT_CHAR 2 | |
2584 | #define TRAIL_INT 4 | |
2585 | #define E_CHAR 8 | |
2586 | #define EXP_INT 16 | |
2587 | ||
2588 | int | |
2589 | isfloat_string (cp) | |
2590 | register char *cp; | |
2591 | { | |
c1a2f60a | 2592 | register int state; |
078e7b4a | 2593 | |
d8578e58 RS |
2594 | char *start = cp; |
2595 | ||
078e7b4a JB |
2596 | state = 0; |
2597 | if (*cp == '+' || *cp == '-') | |
2598 | cp++; | |
2599 | ||
075027b1 | 2600 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2601 | { |
2602 | state |= LEAD_INT; | |
075027b1 RS |
2603 | while (*cp >= '0' && *cp <= '9') |
2604 | cp++; | |
078e7b4a JB |
2605 | } |
2606 | if (*cp == '.') | |
2607 | { | |
2608 | state |= DOT_CHAR; | |
2609 | cp++; | |
2610 | } | |
075027b1 | 2611 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2612 | { |
2613 | state |= TRAIL_INT; | |
075027b1 | 2614 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2615 | cp++; |
2616 | } | |
a35f88bf | 2617 | if (*cp == 'e' || *cp == 'E') |
078e7b4a JB |
2618 | { |
2619 | state |= E_CHAR; | |
2620 | cp++; | |
e73997a1 RS |
2621 | if (*cp == '+' || *cp == '-') |
2622 | cp++; | |
078e7b4a | 2623 | } |
078e7b4a | 2624 | |
075027b1 | 2625 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2626 | { |
2627 | state |= EXP_INT; | |
075027b1 | 2628 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2629 | cp++; |
2630 | } | |
d8578e58 RS |
2631 | else if (cp == start) |
2632 | ; | |
eb659c41 RS |
2633 | else if (cp[-1] == '+' && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') |
2634 | { | |
2635 | state |= EXP_INT; | |
2636 | cp += 3; | |
2637 | } | |
2638 | else if (cp[-1] == '+' && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
2639 | { | |
2640 | state |= EXP_INT; | |
2641 | cp += 3; | |
2642 | } | |
2643 | ||
37579d7c | 2644 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
078e7b4a | 2645 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
151bdc83 | 2646 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 2647 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
2648 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
2649 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a | 2650 | } |
cc94f3b2 | 2651 | |
078e7b4a JB |
2652 | \f |
2653 | static Lisp_Object | |
c15cfd1f | 2654 | read_vector (readcharfun, bytecodeflag) |
078e7b4a | 2655 | Lisp_Object readcharfun; |
c15cfd1f | 2656 | int bytecodeflag; |
078e7b4a JB |
2657 | { |
2658 | register int i; | |
2659 | register int size; | |
2660 | register Lisp_Object *ptr; | |
c15cfd1f | 2661 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
2662 | register struct Lisp_Cons *otem; |
2663 | Lisp_Object len; | |
2664 | ||
2665 | tem = read_list (1, readcharfun); | |
2666 | len = Flength (tem); | |
2667 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
2668 | ||
078e7b4a JB |
2669 | size = XVECTOR (vector)->size; |
2670 | ptr = XVECTOR (vector)->contents; | |
2671 | for (i = 0; i < size; i++) | |
2672 | { | |
c15cfd1f RS |
2673 | item = Fcar (tem); |
2674 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
2675 | bytecode object, the docstring containing the bytecode and | |
2676 | constants values must be treated as unibyte and passed to | |
2677 | Fread, to get the actual bytecode string and constants vector. */ | |
2678 | if (bytecodeflag && load_force_doc_strings) | |
2679 | { | |
2680 | if (i == COMPILED_BYTECODE) | |
2681 | { | |
2682 | if (!STRINGP (item)) | |
2683 | error ("invalid byte code"); | |
2684 | ||
2685 | /* Delay handling the bytecode slot until we know whether | |
2686 | it is lazily-loaded (we can tell by whether the | |
2687 | constants slot is nil). */ | |
2688 | ptr[COMPILED_CONSTANTS] = item; | |
2689 | item = Qnil; | |
2690 | } | |
2691 | else if (i == COMPILED_CONSTANTS) | |
2692 | { | |
2693 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
2694 | ||
2695 | if (NILP (item)) | |
2696 | { | |
2697 | /* Coerce string to unibyte (like string-as-unibyte, | |
2698 | but without generating extra garbage and | |
2699 | guaranteeing no change in the contents). */ | |
2700 | XSTRING (bytestr)->size = STRING_BYTES (XSTRING (bytestr)); | |
2701 | SET_STRING_BYTES (XSTRING (bytestr), -1); | |
2702 | ||
2703 | item = Fread (bytestr); | |
2704 | if (!CONSP (item)) | |
2705 | error ("invalid byte code"); | |
2706 | ||
2707 | otem = XCONS (item); | |
c1d497be KR |
2708 | bytestr = XCAR (item); |
2709 | item = XCDR (item); | |
c15cfd1f RS |
2710 | free_cons (otem); |
2711 | } | |
2712 | ||
2713 | /* Now handle the bytecode slot. */ | |
2714 | ptr[COMPILED_BYTECODE] = read_pure ? Fpurecopy (bytestr) : bytestr; | |
2715 | } | |
2716 | } | |
2717 | ptr[i] = read_pure ? Fpurecopy (item) : item; | |
078e7b4a JB |
2718 | otem = XCONS (tem); |
2719 | tem = Fcdr (tem); | |
2720 | free_cons (otem); | |
2721 | } | |
2722 | return vector; | |
2723 | } | |
2724 | ||
6f7f43d5 RS |
2725 | /* FLAG = 1 means check for ] to terminate rather than ) and . |
2726 | FLAG = -1 means check for starting with defun | |
078e7b4a JB |
2727 | and make structure pure. */ |
2728 | ||
2729 | static Lisp_Object | |
2730 | read_list (flag, readcharfun) | |
2731 | int flag; | |
2732 | register Lisp_Object readcharfun; | |
2733 | { | |
2734 | /* -1 means check next element for defun, | |
2735 | 0 means don't check, | |
2736 | 1 means already checked and found defun. */ | |
2737 | int defunflag = flag < 0 ? -1 : 0; | |
2738 | Lisp_Object val, tail; | |
2739 | register Lisp_Object elt, tem; | |
2740 | struct gcpro gcpro1, gcpro2; | |
821d417e | 2741 | /* 0 is the normal case. |
b2a30870 RS |
2742 | 1 means this list is a doc reference; replace it with the number 0. |
2743 | 2 means this list is a doc reference; replace it with the doc string. */ | |
821d417e | 2744 | int doc_reference = 0; |
078e7b4a | 2745 | |
17634846 RS |
2746 | /* Initialize this to 1 if we are reading a list. */ |
2747 | int first_in_list = flag <= 0; | |
2748 | ||
078e7b4a JB |
2749 | val = Qnil; |
2750 | tail = Qnil; | |
2751 | ||
2752 | while (1) | |
2753 | { | |
e28552a4 | 2754 | int ch; |
078e7b4a | 2755 | GCPRO2 (val, tail); |
17634846 | 2756 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 2757 | UNGCPRO; |
20ea2964 | 2758 | |
17634846 RS |
2759 | first_in_list = 0; |
2760 | ||
821d417e | 2761 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 2762 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 2763 | && ! NILP (elt) |
821d417e RS |
2764 | && !NILP (Vpurify_flag)) |
2765 | { | |
2766 | if (NILP (Vdoc_file_name)) | |
2767 | /* We have not yet called Snarf-documentation, so assume | |
2768 | this file is described in the DOC-MM.NN file | |
2769 | and Snarf-documentation will fill in the right value later. | |
2770 | For now, replace the whole list with 0. */ | |
2771 | doc_reference = 1; | |
2772 | else | |
2773 | /* We have already called Snarf-documentation, so make a relative | |
2774 | file name for this file, so it can be found properly | |
2775 | in the installed Lisp directory. | |
2776 | We don't use Fexpand_file_name because that would make | |
2777 | the directory absolute now. */ | |
2778 | elt = concat2 (build_string ("../lisp/"), | |
2779 | Ffile_name_nondirectory (elt)); | |
2780 | } | |
b2a30870 | 2781 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 2782 | && ! NILP (elt) |
b2a30870 RS |
2783 | && load_force_doc_strings) |
2784 | doc_reference = 2; | |
20ea2964 | 2785 | |
6428369f | 2786 | if (ch) |
078e7b4a JB |
2787 | { |
2788 | if (flag > 0) | |
2789 | { | |
6428369f | 2790 | if (ch == ']') |
078e7b4a | 2791 | return val; |
821d417e RS |
2792 | Fsignal (Qinvalid_read_syntax, |
2793 | Fcons (make_string (") or . in a vector", 18), Qnil)); | |
078e7b4a | 2794 | } |
6428369f | 2795 | if (ch == ')') |
078e7b4a | 2796 | return val; |
6428369f | 2797 | if (ch == '.') |
078e7b4a JB |
2798 | { |
2799 | GCPRO2 (val, tail); | |
265a9e55 | 2800 | if (!NILP (tail)) |
f5df591a | 2801 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
2802 | else |
2803 | val = read0 (readcharfun); | |
17634846 | 2804 | read1 (readcharfun, &ch, 0); |
078e7b4a | 2805 | UNGCPRO; |
6428369f | 2806 | if (ch == ')') |
821d417e RS |
2807 | { |
2808 | if (doc_reference == 1) | |
2809 | return make_number (0); | |
b2a30870 RS |
2810 | if (doc_reference == 2) |
2811 | { | |
2812 | /* Get a doc string from the file we are loading. | |
2813 | If it's in saved_doc_string, get it from there. */ | |
c1d497be | 2814 | int pos = XINT (XCDR (val)); |
c15cfd1f RS |
2815 | /* Position is negative for user variables. */ |
2816 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
2817 | if (pos >= saved_doc_string_position |
2818 | && pos < (saved_doc_string_position | |
2819 | + saved_doc_string_length)) | |
2820 | { | |
2821 | int start = pos - saved_doc_string_position; | |
2822 | int from, to; | |
2823 | ||
2824 | /* Process quoting with ^A, | |
2825 | and find the end of the string, | |
2826 | which is marked with ^_ (037). */ | |
2827 | for (from = start, to = start; | |
2828 | saved_doc_string[from] != 037;) | |
2829 | { | |
2830 | int c = saved_doc_string[from++]; | |
2831 | if (c == 1) | |
2832 | { | |
2833 | c = saved_doc_string[from++]; | |
2834 | if (c == 1) | |
2835 | saved_doc_string[to++] = c; | |
2836 | else if (c == '0') | |
2837 | saved_doc_string[to++] = 0; | |
2838 | else if (c == '_') | |
2839 | saved_doc_string[to++] = 037; | |
2840 | } | |
2841 | else | |
2842 | saved_doc_string[to++] = c; | |
2843 | } | |
2844 | ||
2845 | return make_string (saved_doc_string + start, | |
2846 | to - start); | |
2847 | } | |
c15cfd1f RS |
2848 | /* Look in prev_saved_doc_string the same way. */ |
2849 | else if (pos >= prev_saved_doc_string_position | |
2850 | && pos < (prev_saved_doc_string_position | |
2851 | + prev_saved_doc_string_length)) | |
2852 | { | |
2853 | int start = pos - prev_saved_doc_string_position; | |
2854 | int from, to; | |
2855 | ||
2856 | /* Process quoting with ^A, | |
2857 | and find the end of the string, | |
2858 | which is marked with ^_ (037). */ | |
2859 | for (from = start, to = start; | |
2860 | prev_saved_doc_string[from] != 037;) | |
2861 | { | |
2862 | int c = prev_saved_doc_string[from++]; | |
2863 | if (c == 1) | |
2864 | { | |
2865 | c = prev_saved_doc_string[from++]; | |
2866 | if (c == 1) | |
2867 | prev_saved_doc_string[to++] = c; | |
2868 | else if (c == '0') | |
2869 | prev_saved_doc_string[to++] = 0; | |
2870 | else if (c == '_') | |
2871 | prev_saved_doc_string[to++] = 037; | |
2872 | } | |
2873 | else | |
2874 | prev_saved_doc_string[to++] = c; | |
2875 | } | |
2876 | ||
2877 | return make_string (prev_saved_doc_string + start, | |
2878 | to - start); | |
2879 | } | |
b2a30870 | 2880 | else |
6fe9cce5 | 2881 | return get_doc_string (val, 0, 0); |
b2a30870 RS |
2882 | } |
2883 | ||
821d417e RS |
2884 | return val; |
2885 | } | |
078e7b4a JB |
2886 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
2887 | } | |
2888 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
2889 | } | |
2890 | tem = (read_pure && flag <= 0 | |
2891 | ? pure_cons (elt, Qnil) | |
2892 | : Fcons (elt, Qnil)); | |
265a9e55 | 2893 | if (!NILP (tail)) |
f5df591a | 2894 | XSETCDR (tail, tem); |
078e7b4a JB |
2895 | else |
2896 | val = tem; | |
2897 | tail = tem; | |
2898 | if (defunflag < 0) | |
2899 | defunflag = EQ (elt, Qdefun); | |
2900 | else if (defunflag > 0) | |
2901 | read_pure = 1; | |
2902 | } | |
2903 | } | |
2904 | \f | |
2905 | Lisp_Object Vobarray; | |
2906 | Lisp_Object initial_obarray; | |
2907 | ||
d007f5c8 RS |
2908 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
2909 | ||
2910 | int oblookup_last_bucket_number; | |
2911 | ||
2912 | static int hash_string (); | |
2913 | Lisp_Object oblookup (); | |
2914 | ||
2915 | /* Get an error if OBARRAY is not an obarray. | |
2916 | If it is one, return it. */ | |
2917 | ||
078e7b4a JB |
2918 | Lisp_Object |
2919 | check_obarray (obarray) | |
2920 | Lisp_Object obarray; | |
2921 | { | |
cfff016d | 2922 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
2923 | { |
2924 | /* If Vobarray is now invalid, force it to be valid. */ | |
2925 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
2926 | ||
2927 | obarray = wrong_type_argument (Qvectorp, obarray); | |
2928 | } | |
2929 | return obarray; | |
2930 | } | |
2931 | ||
d007f5c8 RS |
2932 | /* Intern the C string STR: return a symbol with that name, |
2933 | interned in the current obarray. */ | |
078e7b4a JB |
2934 | |
2935 | Lisp_Object | |
2936 | intern (str) | |
2937 | char *str; | |
2938 | { | |
2939 | Lisp_Object tem; | |
2940 | int len = strlen (str); | |
153a17b7 | 2941 | Lisp_Object obarray; |
078e7b4a | 2942 | |
153a17b7 | 2943 | obarray = Vobarray; |
cfff016d | 2944 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a | 2945 | obarray = check_obarray (obarray); |
e28552a4 | 2946 | tem = oblookup (obarray, str, len, len); |
cfff016d | 2947 | if (SYMBOLP (tem)) |
078e7b4a | 2948 | return tem; |
87631ef7 | 2949 | return Fintern (make_string (str, len), obarray); |
078e7b4a | 2950 | } |
4ad679f9 EN |
2951 | |
2952 | /* Create an uninterned symbol with name STR. */ | |
2953 | ||
2954 | Lisp_Object | |
2955 | make_symbol (str) | |
2956 | char *str; | |
2957 | { | |
2958 | int len = strlen (str); | |
2959 | ||
2960 | return Fmake_symbol ((!NILP (Vpurify_flag) | |
491f16a2 | 2961 | ? make_pure_string (str, len, len, 0) |
4ad679f9 EN |
2962 | : make_string (str, len))); |
2963 | } | |
d007f5c8 | 2964 | \f |
078e7b4a | 2965 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
2966 | doc: /* Return the canonical symbol whose name is STRING. |
2967 | If there is none, one is created by this function and returned. | |
2968 | A second optional argument specifies the obarray to use; | |
2969 | it defaults to the value of `obarray'. */) | |
2970 | (string, obarray) | |
9391b698 | 2971 | Lisp_Object string, obarray; |
078e7b4a JB |
2972 | { |
2973 | register Lisp_Object tem, sym, *ptr; | |
2974 | ||
265a9e55 | 2975 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
2976 | obarray = check_obarray (obarray); |
2977 | ||
b7826503 | 2978 | CHECK_STRING (string); |
078e7b4a | 2979 | |
e28552a4 RS |
2980 | tem = oblookup (obarray, XSTRING (string)->data, |
2981 | XSTRING (string)->size, | |
fc932ac6 | 2982 | STRING_BYTES (XSTRING (string))); |
cfff016d | 2983 | if (!INTEGERP (tem)) |
078e7b4a JB |
2984 | return tem; |
2985 | ||
265a9e55 | 2986 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
2987 | string = Fpurecopy (string); |
2988 | sym = Fmake_symbol (string); | |
44c6c019 GM |
2989 | |
2990 | if (EQ (obarray, initial_obarray)) | |
2991 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
2992 | else | |
2993 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 2994 | |
bdd47b1c | 2995 | if ((XSTRING (string)->data[0] == ':') |
a458d45d | 2996 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
2997 | { |
2998 | XSYMBOL (sym)->constant = 1; | |
2999 | XSYMBOL (sym)->value = sym; | |
3000 | } | |
a0549832 | 3001 | |
078e7b4a | 3002 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
cfff016d | 3003 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
3004 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
3005 | else | |
3006 | XSYMBOL (sym)->next = 0; | |
3007 | *ptr = sym; | |
3008 | return sym; | |
3009 | } | |
3010 | ||
3011 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
5de38842 PJ |
3012 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3013 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3014 | symbol is searched for. | |
3015 | A second optional argument specifies the obarray to use; | |
3016 | it defaults to the value of `obarray'. */) | |
3017 | (name, obarray) | |
b55048d4 | 3018 | Lisp_Object name, obarray; |
078e7b4a JB |
3019 | { |
3020 | register Lisp_Object tem; | |
b55048d4 | 3021 | struct Lisp_String *string; |
078e7b4a | 3022 | |
265a9e55 | 3023 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3024 | obarray = check_obarray (obarray); |
3025 | ||
b55048d4 GM |
3026 | if (!SYMBOLP (name)) |
3027 | { | |
b7826503 | 3028 | CHECK_STRING (name); |
b55048d4 GM |
3029 | string = XSTRING (name); |
3030 | } | |
3031 | else | |
3032 | string = XSYMBOL (name)->name; | |
078e7b4a | 3033 | |
b55048d4 GM |
3034 | tem = oblookup (obarray, string->data, string->size, STRING_BYTES (string)); |
3035 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) | |
3036 | return Qnil; | |
3037 | else | |
078e7b4a | 3038 | return tem; |
078e7b4a | 3039 | } |
d007f5c8 RS |
3040 | \f |
3041 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, | |
5de38842 PJ |
3042 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3043 | The value is t if a symbol was found and deleted, nil otherwise. | |
3044 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3045 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3046 | OBARRAY defaults to the value of the variable `obarray'. */) | |
3047 | (name, obarray) | |
d007f5c8 RS |
3048 | Lisp_Object name, obarray; |
3049 | { | |
3050 | register Lisp_Object string, tem; | |
3051 | int hash; | |
3052 | ||
3053 | if (NILP (obarray)) obarray = Vobarray; | |
3054 | obarray = check_obarray (obarray); | |
3055 | ||
3056 | if (SYMBOLP (name)) | |
3057 | XSETSTRING (string, XSYMBOL (name)->name); | |
3058 | else | |
3059 | { | |
b7826503 | 3060 | CHECK_STRING (name); |
d007f5c8 RS |
3061 | string = name; |
3062 | } | |
3063 | ||
e28552a4 RS |
3064 | tem = oblookup (obarray, XSTRING (string)->data, |
3065 | XSTRING (string)->size, | |
fc932ac6 | 3066 | STRING_BYTES (XSTRING (string))); |
d007f5c8 RS |
3067 | if (INTEGERP (tem)) |
3068 | return Qnil; | |
3069 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3070 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3071 | return Qnil; | |
3072 | ||
44c6c019 GM |
3073 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
3074 | XSYMBOL (tem)->constant = 0; | |
3075 | XSYMBOL (tem)->indirect_variable = 0; | |
ca69c42f | 3076 | |
d007f5c8 RS |
3077 | hash = oblookup_last_bucket_number; |
3078 | ||
3079 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
3080 | { |
3081 | if (XSYMBOL (tem)->next) | |
3082 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
3083 | else | |
3084 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
3085 | } | |
d007f5c8 RS |
3086 | else |
3087 | { | |
3088 | Lisp_Object tail, following; | |
3089 | ||
3090 | for (tail = XVECTOR (obarray)->contents[hash]; | |
3091 | XSYMBOL (tail)->next; | |
3092 | tail = following) | |
3093 | { | |
3094 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3095 | if (EQ (following, tem)) | |
3096 | { | |
3097 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
3098 | break; | |
3099 | } | |
3100 | } | |
3101 | } | |
3102 | ||
3103 | return Qt; | |
3104 | } | |
3105 | \f | |
3106 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3107 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3108 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3109 | |
3110 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3111 | |
3112 | Lisp_Object | |
e28552a4 | 3113 | oblookup (obarray, ptr, size, size_byte) |
078e7b4a JB |
3114 | Lisp_Object obarray; |
3115 | register char *ptr; | |
e28552a4 | 3116 | int size, size_byte; |
078e7b4a | 3117 | { |
7a70b397 RS |
3118 | int hash; |
3119 | int obsize; | |
078e7b4a JB |
3120 | register Lisp_Object tail; |
3121 | Lisp_Object bucket, tem; | |
3122 | ||
cfff016d | 3123 | if (!VECTORP (obarray) |
7c79a684 | 3124 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
3125 | { |
3126 | obarray = check_obarray (obarray); | |
3127 | obsize = XVECTOR (obarray)->size; | |
3128 | } | |
519418b3 RS |
3129 | /* This is sometimes needed in the middle of GC. */ |
3130 | obsize &= ~ARRAY_MARK_FLAG; | |
078e7b4a | 3131 | /* Combining next two lines breaks VMS C 2.3. */ |
e28552a4 | 3132 | hash = hash_string (ptr, size_byte); |
078e7b4a JB |
3133 | hash %= obsize; |
3134 | bucket = XVECTOR (obarray)->contents[hash]; | |
d007f5c8 | 3135 | oblookup_last_bucket_number = hash; |
078e7b4a JB |
3136 | if (XFASTINT (bucket) == 0) |
3137 | ; | |
cfff016d | 3138 | else if (!SYMBOLP (bucket)) |
078e7b4a | 3139 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
3140 | else |
3141 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3142 | { |
fc932ac6 | 3143 | if (STRING_BYTES (XSYMBOL (tail)->name) == size_byte |
e28552a4 RS |
3144 | && XSYMBOL (tail)->name->size == size |
3145 | && !bcmp (XSYMBOL (tail)->name->data, ptr, size_byte)) | |
078e7b4a JB |
3146 | return tail; |
3147 | else if (XSYMBOL (tail)->next == 0) | |
3148 | break; | |
3149 | } | |
1805de4f | 3150 | XSETINT (tem, hash); |
078e7b4a JB |
3151 | return tem; |
3152 | } | |
3153 | ||
3154 | static int | |
3155 | hash_string (ptr, len) | |
3156 | unsigned char *ptr; | |
3157 | int len; | |
3158 | { | |
3159 | register unsigned char *p = ptr; | |
3160 | register unsigned char *end = p + len; | |
3161 | register unsigned char c; | |
3162 | register int hash = 0; | |
3163 | ||
3164 | while (p != end) | |
3165 | { | |
3166 | c = *p++; | |
3167 | if (c >= 0140) c -= 40; | |
3168 | hash = ((hash<<3) + (hash>>28) + c); | |
3169 | } | |
3170 | return hash & 07777777777; | |
3171 | } | |
d007f5c8 | 3172 | \f |
078e7b4a JB |
3173 | void |
3174 | map_obarray (obarray, fn, arg) | |
3175 | Lisp_Object obarray; | |
d5b28a9d | 3176 | void (*fn) P_ ((Lisp_Object, Lisp_Object)); |
078e7b4a JB |
3177 | Lisp_Object arg; |
3178 | { | |
3179 | register int i; | |
3180 | register Lisp_Object tail; | |
b7826503 | 3181 | CHECK_VECTOR (obarray); |
078e7b4a JB |
3182 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) |
3183 | { | |
3184 | tail = XVECTOR (obarray)->contents[i]; | |
4f5c4403 | 3185 | if (SYMBOLP (tail)) |
078e7b4a JB |
3186 | while (1) |
3187 | { | |
3188 | (*fn) (tail, arg); | |
3189 | if (XSYMBOL (tail)->next == 0) | |
3190 | break; | |
1805de4f | 3191 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3192 | } |
3193 | } | |
3194 | } | |
3195 | ||
d5b28a9d | 3196 | void |
078e7b4a JB |
3197 | mapatoms_1 (sym, function) |
3198 | Lisp_Object sym, function; | |
3199 | { | |
3200 | call1 (function, sym); | |
3201 | } | |
3202 | ||
3203 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3204 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3205 | OBARRAY defaults to the value of `obarray'. */) | |
3206 | (function, obarray) | |
078e7b4a JB |
3207 | Lisp_Object function, obarray; |
3208 | { | |
265a9e55 | 3209 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3210 | obarray = check_obarray (obarray); |
3211 | ||
3212 | map_obarray (obarray, mapatoms_1, function); | |
3213 | return Qnil; | |
3214 | } | |
3215 | ||
5e88a39e | 3216 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3217 | |
3218 | void | |
3219 | init_obarray () | |
3220 | { | |
3221 | Lisp_Object oblength; | |
3222 | int hash; | |
3223 | Lisp_Object *tem; | |
3224 | ||
baf69866 | 3225 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3226 | |
491f16a2 | 3227 | Qnil = Fmake_symbol (make_pure_string ("nil", 3, 3, 0)); |
078e7b4a JB |
3228 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3229 | initial_obarray = Vobarray; | |
3230 | staticpro (&initial_obarray); | |
3231 | /* Intern nil in the obarray */ | |
44c6c019 GM |
3232 | XSYMBOL (Qnil)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; |
3233 | XSYMBOL (Qnil)->constant = 1; | |
3234 | ||
078e7b4a JB |
3235 | /* These locals are to kludge around a pyramid compiler bug. */ |
3236 | hash = hash_string ("nil", 3); | |
3237 | /* Separate statement here to avoid VAXC bug. */ | |
3238 | hash %= OBARRAY_SIZE; | |
3239 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
3240 | *tem = Qnil; | |
3241 | ||
491f16a2 | 3242 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7, 7, 0)); |
078e7b4a JB |
3243 | XSYMBOL (Qnil)->function = Qunbound; |
3244 | XSYMBOL (Qunbound)->value = Qunbound; | |
3245 | XSYMBOL (Qunbound)->function = Qunbound; | |
3246 | ||
3247 | Qt = intern ("t"); | |
3248 | XSYMBOL (Qnil)->value = Qnil; | |
3249 | XSYMBOL (Qnil)->plist = Qnil; | |
3250 | XSYMBOL (Qt)->value = Qt; | |
44c6c019 | 3251 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
3252 | |
3253 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
3254 | Vpurify_flag = Qt; | |
3255 | ||
3256 | Qvariable_documentation = intern ("variable-documentation"); | |
0f73bb1c | 3257 | staticpro (&Qvariable_documentation); |
078e7b4a | 3258 | |
449fea39 | 3259 | read_buffer_size = 100 + MAX_MULTIBYTE_LENGTH; |
3cb65b0e | 3260 | read_buffer = (char *) xmalloc (read_buffer_size); |
078e7b4a JB |
3261 | } |
3262 | \f | |
3263 | void | |
3264 | defsubr (sname) | |
3265 | struct Lisp_Subr *sname; | |
3266 | { | |
3267 | Lisp_Object sym; | |
3268 | sym = intern (sname->symbol_name); | |
1805de4f | 3269 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3270 | } |
3271 | ||
3272 | #ifdef NOTDEF /* use fset in subr.el now */ | |
3273 | void | |
3274 | defalias (sname, string) | |
3275 | struct Lisp_Subr *sname; | |
3276 | char *string; | |
3277 | { | |
3278 | Lisp_Object sym; | |
3279 | sym = intern (string); | |
1805de4f | 3280 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3281 | } |
3282 | #endif /* NOTDEF */ | |
3283 | ||
078e7b4a | 3284 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 3285 | to a C variable of type int. Sample call: */ |
5de38842 | 3286 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 3287 | void |
e9e00ff2 | 3288 | defvar_int (namestring, address) |
078e7b4a | 3289 | char *namestring; |
31ade731 | 3290 | EMACS_INT *address; |
078e7b4a | 3291 | { |
1a0f90f7 | 3292 | Lisp_Object sym, val; |
078e7b4a | 3293 | sym = intern (namestring); |
1a0f90f7 | 3294 | val = allocate_misc (); |
47e28b2c | 3295 | XMISCTYPE (val) = Lisp_Misc_Intfwd; |
fc1e7df5 | 3296 | XINTFWD (val)->intvar = address; |
44c6c019 | 3297 | SET_SYMBOL_VALUE (sym, val); |
078e7b4a JB |
3298 | } |
3299 | ||
f0529b5b PJ |
3300 | /* Similar but define a variable whose value is t if address contains 1, |
3301 | nil if address contains 0 */ | |
078e7b4a | 3302 | void |
e9e00ff2 | 3303 | defvar_bool (namestring, address) |
078e7b4a JB |
3304 | char *namestring; |
3305 | int *address; | |
078e7b4a | 3306 | { |
1a0f90f7 | 3307 | Lisp_Object sym, val; |
078e7b4a | 3308 | sym = intern (namestring); |
1a0f90f7 | 3309 | val = allocate_misc (); |
47e28b2c | 3310 | XMISCTYPE (val) = Lisp_Misc_Boolfwd; |
fc1e7df5 | 3311 | XBOOLFWD (val)->boolvar = address; |
44c6c019 | 3312 | SET_SYMBOL_VALUE (sym, val); |
1ffcc3b1 | 3313 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
3314 | } |
3315 | ||
1a0f90f7 KH |
3316 | /* Similar but define a variable whose value is the Lisp Object stored |
3317 | at address. Two versions: with and without gc-marking of the C | |
3318 | variable. The nopro version is used when that variable will be | |
3319 | gc-marked for some other reason, since marking the same slot twice | |
3320 | can cause trouble with strings. */ | |
078e7b4a | 3321 | void |
1a0f90f7 | 3322 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
3323 | char *namestring; |
3324 | Lisp_Object *address; | |
078e7b4a | 3325 | { |
1a0f90f7 | 3326 | Lisp_Object sym, val; |
078e7b4a | 3327 | sym = intern (namestring); |
1a0f90f7 | 3328 | val = allocate_misc (); |
47e28b2c | 3329 | XMISCTYPE (val) = Lisp_Misc_Objfwd; |
fc1e7df5 | 3330 | XOBJFWD (val)->objvar = address; |
44c6c019 | 3331 | SET_SYMBOL_VALUE (sym, val); |
078e7b4a JB |
3332 | } |
3333 | ||
078e7b4a | 3334 | void |
1a0f90f7 | 3335 | defvar_lisp (namestring, address) |
078e7b4a JB |
3336 | char *namestring; |
3337 | Lisp_Object *address; | |
078e7b4a | 3338 | { |
1a0f90f7 KH |
3339 | defvar_lisp_nopro (namestring, address); |
3340 | staticpro (address); | |
078e7b4a JB |
3341 | } |
3342 | ||
078e7b4a | 3343 | /* Similar but define a variable whose value is the Lisp Object stored in |
2836d9a4 KH |
3344 | the current buffer. address is the address of the slot in the buffer |
3345 | that is current now. */ | |
078e7b4a JB |
3346 | |
3347 | void | |
4360b0c6 | 3348 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
3349 | char *namestring; |
3350 | Lisp_Object *address; | |
4360b0c6 | 3351 | Lisp_Object type; |
078e7b4a JB |
3352 | char *doc; |
3353 | { | |
1a0f90f7 | 3354 | Lisp_Object sym, val; |
078e7b4a JB |
3355 | int offset; |
3356 | extern struct buffer buffer_local_symbols; | |
3357 | ||
3358 | sym = intern (namestring); | |
1a0f90f7 | 3359 | val = allocate_misc (); |
078e7b4a JB |
3360 | offset = (char *)address - (char *)current_buffer; |
3361 | ||
47e28b2c | 3362 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 3363 | XBUFFER_OBJFWD (val)->offset = offset; |
44c6c019 | 3364 | SET_SYMBOL_VALUE (sym, val); |
11fd416e GM |
3365 | PER_BUFFER_SYMBOL (offset) = sym; |
3366 | PER_BUFFER_TYPE (offset) = type; | |
cf611f01 | 3367 | |
11fd416e | 3368 | if (PER_BUFFER_IDX (offset) == 0) |
078e7b4a JB |
3369 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
3370 | slot of buffer_local_flags */ | |
3371 | abort (); | |
3372 | } | |
3373 | ||
950c215d KH |
3374 | |
3375 | /* Similar but define a variable whose value is the Lisp Object stored | |
4ac38690 | 3376 | at a particular offset in the current kboard object. */ |
950c215d KH |
3377 | |
3378 | void | |
4ac38690 | 3379 | defvar_kboard (namestring, offset) |
950c215d KH |
3380 | char *namestring; |
3381 | int offset; | |
3382 | { | |
3383 | Lisp_Object sym, val; | |
3384 | sym = intern (namestring); | |
3385 | val = allocate_misc (); | |
47e28b2c | 3386 | XMISCTYPE (val) = Lisp_Misc_Kboard_Objfwd; |
4ac38690 | 3387 | XKBOARD_OBJFWD (val)->offset = offset; |
44c6c019 | 3388 | SET_SYMBOL_VALUE (sym, val); |
950c215d | 3389 | } |
078e7b4a | 3390 | \f |
11938f10 KH |
3391 | /* Record the value of load-path used at the start of dumping |
3392 | so we can see if the site changed it later during dumping. */ | |
3393 | static Lisp_Object dump_path; | |
3394 | ||
d5b28a9d | 3395 | void |
279499f0 | 3396 | init_lread () |
078e7b4a | 3397 | { |
46947372 | 3398 | char *normal; |
e73997a1 | 3399 | int turn_off_warning = 0; |
078e7b4a | 3400 | |
279499f0 | 3401 | /* Compute the default load-path. */ |
46947372 JB |
3402 | #ifdef CANNOT_DUMP |
3403 | normal = PATH_LOADSEARCH; | |
e065a56e | 3404 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
3405 | #else |
3406 | if (NILP (Vpurify_flag)) | |
3407 | normal = PATH_LOADSEARCH; | |
279499f0 | 3408 | else |
46947372 | 3409 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 3410 | |
46947372 JB |
3411 | /* In a dumped Emacs, we normally have to reset the value of |
3412 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
3413 | uses ../lisp, instead of the path of the installed elisp | |
3414 | libraries. However, if it appears that Vload_path was changed | |
3415 | from the default before dumping, don't override that value. */ | |
4746118a JB |
3416 | if (initialized) |
3417 | { | |
4746118a | 3418 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
3419 | { |
3420 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 3421 | if (!NILP (Vinstallation_directory)) |
80667d53 | 3422 | { |
3ddff138 RS |
3423 | Lisp_Object tem, tem1, sitelisp; |
3424 | ||
3425 | /* Remove site-lisp dirs from path temporarily and store | |
3426 | them in sitelisp, then conc them on at the end so | |
3427 | they're always first in path. */ | |
3428 | sitelisp = Qnil; | |
3429 | while (1) | |
3430 | { | |
3431 | tem = Fcar (Vload_path); | |
3432 | tem1 = Fstring_match (build_string ("site-lisp"), | |
3433 | tem, Qnil); | |
3434 | if (!NILP (tem1)) | |
3435 | { | |
3436 | Vload_path = Fcdr (Vload_path); | |
3437 | sitelisp = Fcons (tem, sitelisp); | |
3438 | } | |
3439 | else | |
3440 | break; | |
3441 | } | |
3442 | ||
74180aa4 | 3443 | /* Add to the path the lisp subdir of the |
3a3056e5 | 3444 | installation dir, if it exists. */ |
74180aa4 RS |
3445 | tem = Fexpand_file_name (build_string ("lisp"), |
3446 | Vinstallation_directory); | |
3a3056e5 RS |
3447 | tem1 = Ffile_exists_p (tem); |
3448 | if (!NILP (tem1)) | |
3449 | { | |
3450 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
3451 | { |
3452 | turn_off_warning = 1; | |
3ddff138 | 3453 | Vload_path = Fcons (tem, Vload_path); |
e73997a1 | 3454 | } |
3a3056e5 RS |
3455 | } |
3456 | else | |
3457 | /* That dir doesn't exist, so add the build-time | |
3458 | Lisp dirs instead. */ | |
3459 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c | 3460 | |
9fbc0116 RS |
3461 | /* Add leim under the installation dir, if it exists. */ |
3462 | tem = Fexpand_file_name (build_string ("leim"), | |
3463 | Vinstallation_directory); | |
3464 | tem1 = Ffile_exists_p (tem); | |
3465 | if (!NILP (tem1)) | |
3466 | { | |
3467 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3468 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 RS |
3469 | } |
3470 | ||
c478f98c RS |
3471 | /* Add site-list under the installation dir, if it exists. */ |
3472 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
3473 | Vinstallation_directory); | |
3474 | tem1 = Ffile_exists_p (tem); | |
3475 | if (!NILP (tem1)) | |
3476 | { | |
3477 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3478 | Vload_path = Fcons (tem, Vload_path); |
c478f98c | 3479 | } |
0f337465 RS |
3480 | |
3481 | /* If Emacs was not built in the source directory, | |
9fbc0116 RS |
3482 | and it is run from where it was built, add to load-path |
3483 | the lisp, leim and site-lisp dirs under that directory. */ | |
0f337465 RS |
3484 | |
3485 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) | |
3486 | { | |
33046fc9 RS |
3487 | Lisp_Object tem2; |
3488 | ||
0f337465 RS |
3489 | tem = Fexpand_file_name (build_string ("src/Makefile"), |
3490 | Vinstallation_directory); | |
3491 | tem1 = Ffile_exists_p (tem); | |
33046fc9 RS |
3492 | |
3493 | /* Don't be fooled if they moved the entire source tree | |
3494 | AFTER dumping Emacs. If the build directory is indeed | |
3495 | different from the source dir, src/Makefile.in and | |
3496 | src/Makefile will not be found together. */ | |
3497 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
3498 | Vinstallation_directory); | |
3499 | tem2 = Ffile_exists_p (tem); | |
3500 | if (!NILP (tem1) && NILP (tem2)) | |
0f337465 RS |
3501 | { |
3502 | tem = Fexpand_file_name (build_string ("lisp"), | |
3503 | Vsource_directory); | |
3504 | ||
3505 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3506 | Vload_path = Fcons (tem, Vload_path); |
0f337465 | 3507 | |
9fbc0116 RS |
3508 | tem = Fexpand_file_name (build_string ("leim"), |
3509 | Vsource_directory); | |
3510 | ||
3511 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3512 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 | 3513 | |
0f337465 RS |
3514 | tem = Fexpand_file_name (build_string ("site-lisp"), |
3515 | Vsource_directory); | |
3516 | ||
3517 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3518 | Vload_path = Fcons (tem, Vload_path); |
0f337465 RS |
3519 | } |
3520 | } | |
3ddff138 RS |
3521 | if (!NILP (sitelisp)) |
3522 | Vload_path = nconc2 (Fnreverse (sitelisp), Vload_path); | |
80667d53 RS |
3523 | } |
3524 | } | |
4746118a JB |
3525 | } |
3526 | else | |
11938f10 | 3527 | { |
7b396c6c RS |
3528 | /* NORMAL refers to the lisp dir in the source directory. */ |
3529 | /* We used to add ../lisp at the front here, but | |
3530 | that caused trouble because it was copied from dump_path | |
3531 | into Vload_path, aboe, when Vinstallation_directory was non-nil. | |
3532 | It should be unnecessary. */ | |
3533 | Vload_path = decode_env_path (0, normal); | |
11938f10 KH |
3534 | dump_path = Vload_path; |
3535 | } | |
46947372 | 3536 | #endif |
279499f0 | 3537 | |
317073d5 RS |
3538 | #ifndef WINDOWSNT |
3539 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
3540 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 3541 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
317073d5 RS |
3542 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
3543 | ||
078e7b4a | 3544 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
3545 | if (!turn_off_warning) |
3546 | { | |
3547 | Lisp_Object path_tail; | |
078e7b4a | 3548 | |
e73997a1 RS |
3549 | for (path_tail = Vload_path; |
3550 | !NILP (path_tail); | |
c1d497be | 3551 | path_tail = XCDR (path_tail)) |
e73997a1 RS |
3552 | { |
3553 | Lisp_Object dirfile; | |
3554 | dirfile = Fcar (path_tail); | |
3555 | if (STRINGP (dirfile)) | |
3556 | { | |
3557 | dirfile = Fdirectory_file_name (dirfile); | |
3558 | if (access (XSTRING (dirfile)->data, 0) < 0) | |
85496b8c | 3559 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", |
c1d497be | 3560 | XCAR (path_tail)); |
e73997a1 RS |
3561 | } |
3562 | } | |
3563 | } | |
317073d5 | 3564 | #endif /* WINDOWSNT */ |
46947372 JB |
3565 | |
3566 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
3567 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 3568 | #ifndef CANNOT_DUMP |
46947372 JB |
3569 | if (NILP (Vpurify_flag) |
3570 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 3571 | #endif |
279499f0 | 3572 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
3573 | |
3574 | Vvalues = Qnil; | |
3575 | ||
078e7b4a | 3576 | load_in_progress = 0; |
4e53f562 | 3577 | Vload_file_name = Qnil; |
d2c6be7f RS |
3578 | |
3579 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
3580 | |
3581 | Vstandard_input = Qt; | |
f74b0705 | 3582 | Vloads_in_progress = Qnil; |
078e7b4a JB |
3583 | } |
3584 | ||
85496b8c RS |
3585 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
3586 | does not exist. Print it on stderr and put it in *Message*. */ | |
3587 | ||
d5b28a9d | 3588 | void |
85496b8c RS |
3589 | dir_warning (format, dirname) |
3590 | char *format; | |
3591 | Lisp_Object dirname; | |
3592 | { | |
3593 | char *buffer | |
3594 | = (char *) alloca (XSTRING (dirname)->size + strlen (format) + 5); | |
3595 | ||
3596 | fprintf (stderr, format, XSTRING (dirname)->data); | |
3597 | sprintf (buffer, format, XSTRING (dirname)->data); | |
9b69357e GV |
3598 | /* Don't log the warning before we've initialized!! */ |
3599 | if (initialized) | |
3600 | message_dolog (buffer, strlen (buffer), 0, STRING_MULTIBYTE (dirname)); | |
85496b8c RS |
3601 | } |
3602 | ||
078e7b4a | 3603 | void |
279499f0 | 3604 | syms_of_lread () |
078e7b4a JB |
3605 | { |
3606 | defsubr (&Sread); | |
3607 | defsubr (&Sread_from_string); | |
3608 | defsubr (&Sintern); | |
3609 | defsubr (&Sintern_soft); | |
d007f5c8 | 3610 | defsubr (&Sunintern); |
078e7b4a | 3611 | defsubr (&Sload); |
228d4b1c | 3612 | defsubr (&Seval_buffer); |
078e7b4a JB |
3613 | defsubr (&Seval_region); |
3614 | defsubr (&Sread_char); | |
3615 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 3616 | defsubr (&Sread_event); |
078e7b4a JB |
3617 | defsubr (&Sget_file_char); |
3618 | defsubr (&Smapatoms); | |
86d00812 | 3619 | defsubr (&Slocate_file_internal); |
078e7b4a JB |
3620 | |
3621 | DEFVAR_LISP ("obarray", &Vobarray, | |
5de38842 PJ |
3622 | doc: /* Symbol table for use by `intern' and `read'. |
3623 | It is a vector whose length ought to be prime for best results. | |
3624 | The vector's contents don't make sense if examined from Lisp programs; | |
3625 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a JB |
3626 | |
3627 | DEFVAR_LISP ("values", &Vvalues, | |
5de38842 PJ |
3628 | doc: /* List of values of all expressions which were read, evaluated and printed. |
3629 | Order is reverse chronological. */); | |
078e7b4a JB |
3630 | |
3631 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
5de38842 PJ |
3632 | doc: /* Stream for read to get input from. |
3633 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
3634 | Vstandard_input = Qt; |
3635 | ||
3636 | DEFVAR_LISP ("load-path", &Vload_path, | |
5de38842 PJ |
3637 | doc: /* *List of directories to search for files to load. |
3638 | Each element is a string (directory name) or nil (try default directory). | |
3639 | Initialized based on EMACSLOADPATH environment variable, if any, | |
3640 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 3641 | |
e61b9b87 | 3642 | DEFVAR_LISP ("load-suffixes", &Vload_suffixes, |
5de38842 PJ |
3643 | doc: /* *List of suffixes to try for files to load. |
3644 | This list should not include the empty string. */); | |
e61b9b87 SM |
3645 | Vload_suffixes = Fcons (build_string (".elc"), |
3646 | Fcons (build_string (".el"), Qnil)); | |
ddb716ef SM |
3647 | /* We don't use empty_string because it's not initialized yet. */ |
3648 | default_suffixes = Fcons (build_string (""), Qnil); | |
e61b9b87 SM |
3649 | staticpro (&default_suffixes); |
3650 | ||
078e7b4a | 3651 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, |
5de38842 | 3652 | doc: /* Non-nil iff inside of `load'. */); |
078e7b4a JB |
3653 | |
3654 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
5de38842 PJ |
3655 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
3656 | Each element looks like (FILENAME FORMS...). | |
3657 | When `load' is run and the file-name argument is FILENAME, | |
3658 | the FORMS in the corresponding element are executed at the end of loading. | |
3659 | ||
3660 | FILENAME must match exactly! Normally FILENAME is the name of a library, | |
3661 | with no directory specified, since that is how `load' is normally called. | |
3662 | An error in FORMS does not undo the load, | |
3663 | but does prevent execution of the rest of the FORMS. | |
3664 | FILENAME can also be a symbol (a feature) and FORMS are then executed | |
3665 | when the corresponding call to `provide' is made. */); | |
078e7b4a JB |
3666 | Vafter_load_alist = Qnil; |
3667 | ||
ae321d28 | 3668 | DEFVAR_LISP ("load-history", &Vload_history, |
5de38842 PJ |
3669 | doc: /* Alist mapping source file names to symbols and features. |
3670 | Each alist element is a list that starts with a file name, | |
3671 | except for one element (optional) that starts with nil and describes | |
3672 | definitions evaluated from buffers not visiting files. | |
3673 | The remaining elements of each list are symbols defined as functions | |
3674 | or variables, and cons cells `(provide . FEATURE)', `(require . FEATURE)', | |
3675 | and `(autoload . SYMBOL)'. */); | |
ae321d28 RS |
3676 | Vload_history = Qnil; |
3677 | ||
20ea2964 | 3678 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
5de38842 | 3679 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
3680 | Vload_file_name = Qnil; |
3681 | ||
4116ab9f | 3682 | DEFVAR_LISP ("user-init-file", &Vuser_init_file, |
5de38842 PJ |
3683 | doc: /* File name, including directory, of user's initialization file. |
3684 | If the file loaded had extension `.elc' and there was a corresponding `.el' | |
3685 | file, this variable contains the name of the .el file, suitable for use | |
3686 | by functions like `custom-save-all' which edit the init file. */); | |
4116ab9f KH |
3687 | Vuser_init_file = Qnil; |
3688 | ||
8a1f1537 | 3689 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
5de38842 | 3690 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
3691 | Vcurrent_load_list = Qnil; |
3692 | ||
84a15045 | 3693 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
5de38842 PJ |
3694 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
3695 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
3696 | Vload_read_function = Qnil; |
3697 | ||
fe0e03f3 | 3698 | DEFVAR_LISP ("load-source-file-function", &Vload_source_file_function, |
5de38842 PJ |
3699 | doc: /* Function called in `load' for loading an Emacs lisp source file. |
3700 | This function is for doing code conversion before reading the source file. | |
3701 | If nil, loading is done without any code conversion. | |
3702 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
3703 | FULLNAME is the full name of FILE. | |
3704 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
3705 | Vload_source_file_function = Qnil; |
3706 | ||
b2a30870 | 3707 | DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings, |
5de38842 PJ |
3708 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
3709 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
3710 | load_force_doc_strings = 0; |
3711 | ||
94e554db | 3712 | DEFVAR_BOOL ("load-convert-to-unibyte", &load_convert_to_unibyte, |
5de38842 PJ |
3713 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
3714 | This is normally bound by `load' and `eval-buffer' to control `read', | |
3715 | and is not meant for users to change. */); | |
94e554db RS |
3716 | load_convert_to_unibyte = 0; |
3717 | ||
1521a8fa | 3718 | DEFVAR_LISP ("source-directory", &Vsource_directory, |
5de38842 PJ |
3719 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
3720 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
3721 | Vsource_directory |
3722 | = Fexpand_file_name (build_string ("../"), | |
3723 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
3724 | ||
4b104c41 | 3725 | DEFVAR_LISP ("preloaded-file-list", &Vpreloaded_file_list, |
5de38842 | 3726 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
3727 | Vpreloaded_file_list = Qnil; |
3728 | ||
1ffcc3b1 | 3729 | DEFVAR_LISP ("byte-boolean-vars", &Vbyte_boolean_vars, |
5de38842 | 3730 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
3731 | Vbyte_boolean_vars = Qnil; |
3732 | ||
da84f340 | 3733 | DEFVAR_BOOL ("load-dangerous-libraries", &load_dangerous_libraries, |
5de38842 PJ |
3734 | doc: /* Non-nil means load dangerous compiled Lisp files. |
3735 | Some versions of XEmacs use different byte codes than Emacs. These | |
3736 | incompatible byte codes can make Emacs crash when it tries to execute | |
3737 | them. */); | |
da84f340 GM |
3738 | load_dangerous_libraries = 0; |
3739 | ||
bb970e67 | 3740 | DEFVAR_LISP ("bytecomp-version-regexp", &Vbytecomp_version_regexp, |
5de38842 PJ |
3741 | doc: /* Regular expression matching safe to load compiled Lisp files. |
3742 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
3743 | from the file, and matches them against this regular expression. | |
3744 | When the regular expression matches, the file is considered to be safe | |
3745 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 3746 | Vbytecomp_version_regexp |
f2e7d5eb | 3747 | = build_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 3748 | |
a90ba1e2 KH |
3749 | /* Vsource_directory was initialized in init_lread. */ |
3750 | ||
d2c6be7f RS |
3751 | load_descriptor_list = Qnil; |
3752 | staticpro (&load_descriptor_list); | |
3753 | ||
8a1f1537 RS |
3754 | Qcurrent_load_list = intern ("current-load-list"); |
3755 | staticpro (&Qcurrent_load_list); | |
3756 | ||
078e7b4a JB |
3757 | Qstandard_input = intern ("standard-input"); |
3758 | staticpro (&Qstandard_input); | |
3759 | ||
3760 | Qread_char = intern ("read-char"); | |
3761 | staticpro (&Qread_char); | |
3762 | ||
3763 | Qget_file_char = intern ("get-file-char"); | |
3764 | staticpro (&Qget_file_char); | |
7bd279cd | 3765 | |
17634846 RS |
3766 | Qbackquote = intern ("`"); |
3767 | staticpro (&Qbackquote); | |
3768 | Qcomma = intern (","); | |
3769 | staticpro (&Qcomma); | |
3770 | Qcomma_at = intern (",@"); | |
3771 | staticpro (&Qcomma_at); | |
3772 | Qcomma_dot = intern (",."); | |
3773 | staticpro (&Qcomma_dot); | |
3774 | ||
74549846 RS |
3775 | Qinhibit_file_name_operation = intern ("inhibit-file-name-operation"); |
3776 | staticpro (&Qinhibit_file_name_operation); | |
3777 | ||
7bd279cd RS |
3778 | Qascii_character = intern ("ascii-character"); |
3779 | staticpro (&Qascii_character); | |
c2225d00 | 3780 | |
2b6cae0c RS |
3781 | Qfunction = intern ("function"); |
3782 | staticpro (&Qfunction); | |
3783 | ||
c2225d00 RS |
3784 | Qload = intern ("load"); |
3785 | staticpro (&Qload); | |
20ea2964 RS |
3786 | |
3787 | Qload_file_name = intern ("load-file-name"); | |
3788 | staticpro (&Qload_file_name); | |
11938f10 KH |
3789 | |
3790 | staticpro (&dump_path); | |
4ad679f9 EN |
3791 | |
3792 | staticpro (&read_objects); | |
3793 | read_objects = Qnil; | |
9e062b6c RS |
3794 | staticpro (&seen_list); |
3795 | ||
7ee3bd7b GM |
3796 | Vloads_in_progress = Qnil; |
3797 | staticpro (&Vloads_in_progress); | |
078e7b4a | 3798 | } |