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 | ||
abb13b09 CW |
136 | /* Whether or not to add a `read-positions' property to symbols |
137 | read. */ | |
138 | Lisp_Object Vread_with_symbol_positions; | |
139 | ||
140 | /* List of (SYMBOL . POSITION) accumulated so far. */ | |
141 | Lisp_Object Vread_symbol_positions_list; | |
142 | ||
d2c6be7f RS |
143 | /* List of descriptors now open for Fload. */ |
144 | static Lisp_Object load_descriptor_list; | |
145 | ||
b2a30870 | 146 | /* File for get_file_char to read from. Use by load. */ |
078e7b4a JB |
147 | static FILE *instream; |
148 | ||
149 | /* When nonzero, read conses in pure space */ | |
150 | static int read_pure; | |
151 | ||
b2a30870 | 152 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
078e7b4a | 153 | static int read_from_string_index; |
bed23cb2 | 154 | static int read_from_string_index_byte; |
078e7b4a | 155 | static int read_from_string_limit; |
17634846 | 156 | |
6f7f43d5 RS |
157 | /* Number of bytes left to read in the buffer character |
158 | that `readchar' has already advanced over. */ | |
159 | static int readchar_backlog; | |
abb13b09 CW |
160 | /* Number of characters read in the current call to Fread or |
161 | Fread_from_string. */ | |
162 | static int readchar_count; | |
6f7f43d5 | 163 | |
c15cfd1f | 164 | /* This contains the last string skipped with #@. */ |
b2a30870 RS |
165 | static char *saved_doc_string; |
166 | /* Length of buffer allocated in saved_doc_string. */ | |
167 | static int saved_doc_string_size; | |
168 | /* Length of actual data in saved_doc_string. */ | |
169 | static int saved_doc_string_length; | |
170 | /* This is the file position that string came from. */ | |
68c45bf0 | 171 | static file_offset saved_doc_string_position; |
b2a30870 | 172 | |
c15cfd1f RS |
173 | /* This contains the previous string skipped with #@. |
174 | We copy it from saved_doc_string when a new string | |
175 | is put in saved_doc_string. */ | |
176 | static char *prev_saved_doc_string; | |
177 | /* Length of buffer allocated in prev_saved_doc_string. */ | |
178 | static int prev_saved_doc_string_size; | |
179 | /* Length of actual data in prev_saved_doc_string. */ | |
180 | static int prev_saved_doc_string_length; | |
181 | /* This is the file position that string came from. */ | |
68c45bf0 | 182 | static file_offset prev_saved_doc_string_position; |
c15cfd1f | 183 | |
17634846 RS |
184 | /* Nonzero means inside a new-style backquote |
185 | with no surrounding parentheses. | |
186 | Fread initializes this to zero, so we need not specbind it | |
187 | or worry about what happens to it when there is an error. */ | |
188 | static int new_backquote_flag; | |
7ee3bd7b GM |
189 | |
190 | /* A list of file names for files being loaded in Fload. Used to | |
191 | check for recursive loads. */ | |
192 | ||
193 | static Lisp_Object Vloads_in_progress; | |
194 | ||
550a625e GM |
195 | /* Non-zero means load dangerous compiled Lisp files. */ |
196 | ||
197 | int load_dangerous_libraries; | |
198 | ||
199 | /* A regular expression used to detect files compiled with Emacs. */ | |
200 | ||
201 | static Lisp_Object Vbytecomp_version_regexp; | |
202 | ||
a742d646 | 203 | static void to_multibyte P_ ((char **, char **, int *)); |
11d89e5d | 204 | static void readevalloop P_ ((Lisp_Object, FILE*, Lisp_Object, |
550a625e GM |
205 | Lisp_Object (*) (), int, |
206 | Lisp_Object, Lisp_Object)); | |
207 | static Lisp_Object load_unwind P_ ((Lisp_Object)); | |
208 | static Lisp_Object load_descriptor_unwind P_ ((Lisp_Object)); | |
209 | ||
078e7b4a JB |
210 | \f |
211 | /* Handle unreading and rereading of characters. | |
212 | Write READCHAR to read a character, | |
fe0e03f3 KH |
213 | UNREAD(c) to unread c to be read again. |
214 | ||
abb13b09 CW |
215 | The READCHAR and UNREAD macros are meant for reading/unreading a |
216 | byte code; they do not handle multibyte characters. The caller | |
217 | should manage them if necessary. | |
218 | ||
219 | [ Actually that seems to be a lie; READCHAR will definitely read | |
220 | multibyte characters from buffer sources, at least. Is the | |
221 | comment just out of date? | |
222 | -- Colin Walters <walters@gnu.org>, 22 May 2002 16:36:50 -0400 ] | |
fe0e03f3 | 223 | */ |
078e7b4a JB |
224 | |
225 | #define READCHAR readchar (readcharfun) | |
226 | #define UNREAD(c) unreadchar (readcharfun, c) | |
227 | ||
228 | static int | |
229 | readchar (readcharfun) | |
230 | Lisp_Object readcharfun; | |
231 | { | |
232 | Lisp_Object tem; | |
95384e1e | 233 | register int c; |
078e7b4a | 234 | |
abb13b09 CW |
235 | readchar_count++; |
236 | ||
cfff016d | 237 | if (BUFFERP (readcharfun)) |
078e7b4a | 238 | { |
bed23cb2 | 239 | register struct buffer *inbuffer = XBUFFER (readcharfun); |
078e7b4a | 240 | |
bed23cb2 RS |
241 | int pt_byte = BUF_PT_BYTE (inbuffer); |
242 | int orig_pt_byte = pt_byte; | |
6f7f43d5 | 243 | |
00a9a935 RS |
244 | if (readchar_backlog > 0) |
245 | /* We get the address of the byte just passed, | |
246 | which is the last byte of the character. | |
247 | The other bytes in this character are consecutive with it, | |
248 | because the gap can't be in the middle of a character. */ | |
249 | return *(BUF_BYTE_ADDRESS (inbuffer, BUF_PT_BYTE (inbuffer) - 1) | |
250 | - --readchar_backlog); | |
251 | ||
bed23cb2 RS |
252 | if (pt_byte >= BUF_ZV_BYTE (inbuffer)) |
253 | return -1; | |
078e7b4a | 254 | |
00a9a935 RS |
255 | readchar_backlog = -1; |
256 | ||
bed23cb2 RS |
257 | if (! NILP (inbuffer->enable_multibyte_characters)) |
258 | { | |
00a9a935 | 259 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
260 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, pt_byte); |
261 | BUF_INC_POS (inbuffer, pt_byte); | |
262 | c = STRING_CHAR (p, pt_byte - orig_pt_byte); | |
263 | } | |
264 | else | |
265 | { | |
266 | c = BUF_FETCH_BYTE (inbuffer, pt_byte); | |
267 | pt_byte++; | |
6f7f43d5 | 268 | } |
bed23cb2 | 269 | SET_BUF_PT_BOTH (inbuffer, BUF_PT (inbuffer) + 1, pt_byte); |
6f7f43d5 | 270 | |
bed23cb2 | 271 | return c; |
078e7b4a | 272 | } |
cfff016d | 273 | if (MARKERP (readcharfun)) |
078e7b4a | 274 | { |
bed23cb2 | 275 | register struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
078e7b4a | 276 | |
bed23cb2 RS |
277 | int bytepos = marker_byte_position (readcharfun); |
278 | int orig_bytepos = bytepos; | |
6f7f43d5 | 279 | |
00a9a935 RS |
280 | if (readchar_backlog > 0) |
281 | /* We get the address of the byte just passed, | |
282 | which is the last byte of the character. | |
283 | The other bytes in this character are consecutive with it, | |
284 | because the gap can't be in the middle of a character. */ | |
285 | return *(BUF_BYTE_ADDRESS (inbuffer, XMARKER (readcharfun)->bytepos - 1) | |
286 | - --readchar_backlog); | |
287 | ||
bed23cb2 RS |
288 | if (bytepos >= BUF_ZV_BYTE (inbuffer)) |
289 | return -1; | |
6f7f43d5 | 290 | |
00a9a935 RS |
291 | readchar_backlog = -1; |
292 | ||
bed23cb2 RS |
293 | if (! NILP (inbuffer->enable_multibyte_characters)) |
294 | { | |
00a9a935 | 295 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
296 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, bytepos); |
297 | BUF_INC_POS (inbuffer, bytepos); | |
298 | c = STRING_CHAR (p, bytepos - orig_bytepos); | |
299 | } | |
300 | else | |
301 | { | |
302 | c = BUF_FETCH_BYTE (inbuffer, bytepos); | |
303 | bytepos++; | |
6f7f43d5 RS |
304 | } |
305 | ||
bed23cb2 RS |
306 | XMARKER (readcharfun)->bytepos = bytepos; |
307 | XMARKER (readcharfun)->charpos++; | |
308 | ||
309 | return c; | |
078e7b4a | 310 | } |
ad0153e4 RS |
311 | |
312 | if (EQ (readcharfun, Qlambda)) | |
313 | return read_bytecode_char (0); | |
314 | ||
078e7b4a | 315 | if (EQ (readcharfun, Qget_file_char)) |
2c1b5dbe KH |
316 | { |
317 | c = getc (instream); | |
318 | #ifdef EINTR | |
319 | /* Interrupted reads have been observed while reading over the network */ | |
320 | while (c == EOF && ferror (instream) && errno == EINTR) | |
321 | { | |
322 | clearerr (instream); | |
323 | c = getc (instream); | |
324 | } | |
325 | #endif | |
326 | return c; | |
327 | } | |
078e7b4a | 328 | |
cfff016d | 329 | if (STRINGP (readcharfun)) |
078e7b4a | 330 | { |
bed23cb2 | 331 | if (read_from_string_index >= read_from_string_limit) |
078e7b4a | 332 | c = -1; |
f0354c03 | 333 | else |
bed23cb2 RS |
334 | FETCH_STRING_CHAR_ADVANCE (c, readcharfun, |
335 | read_from_string_index, | |
336 | read_from_string_index_byte); | |
6f7f43d5 | 337 | |
078e7b4a JB |
338 | return c; |
339 | } | |
340 | ||
341 | tem = call0 (readcharfun); | |
342 | ||
265a9e55 | 343 | if (NILP (tem)) |
078e7b4a JB |
344 | return -1; |
345 | return XINT (tem); | |
346 | } | |
347 | ||
348 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
349 | If the stream is a user function, call it with the char as argument. */ | |
350 | ||
351 | static void | |
352 | unreadchar (readcharfun, c) | |
353 | Lisp_Object readcharfun; | |
354 | int c; | |
355 | { | |
abb13b09 | 356 | readchar_count--; |
92fddec9 KH |
357 | if (c == -1) |
358 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
359 | since readchar didn't advance it when we read it. */ | |
360 | ; | |
cfff016d | 361 | else if (BUFFERP (readcharfun)) |
d7760ca9 | 362 | { |
bed23cb2 RS |
363 | struct buffer *b = XBUFFER (readcharfun); |
364 | int bytepos = BUF_PT_BYTE (b); | |
d7760ca9 | 365 | |
00a9a935 RS |
366 | if (readchar_backlog >= 0) |
367 | readchar_backlog++; | |
bed23cb2 | 368 | else |
00a9a935 RS |
369 | { |
370 | BUF_PT (b)--; | |
371 | if (! NILP (b->enable_multibyte_characters)) | |
372 | BUF_DEC_POS (b, bytepos); | |
373 | else | |
374 | bytepos--; | |
d7760ca9 | 375 | |
00a9a935 RS |
376 | BUF_PT_BYTE (b) = bytepos; |
377 | } | |
d7760ca9 | 378 | } |
cfff016d | 379 | else if (MARKERP (readcharfun)) |
d7760ca9 | 380 | { |
bed23cb2 RS |
381 | struct buffer *b = XMARKER (readcharfun)->buffer; |
382 | int bytepos = XMARKER (readcharfun)->bytepos; | |
d7760ca9 | 383 | |
00a9a935 RS |
384 | if (readchar_backlog >= 0) |
385 | readchar_backlog++; | |
bed23cb2 | 386 | else |
00a9a935 RS |
387 | { |
388 | XMARKER (readcharfun)->charpos--; | |
389 | if (! NILP (b->enable_multibyte_characters)) | |
390 | BUF_DEC_POS (b, bytepos); | |
391 | else | |
392 | bytepos--; | |
d7760ca9 | 393 | |
00a9a935 RS |
394 | XMARKER (readcharfun)->bytepos = bytepos; |
395 | } | |
d7760ca9 | 396 | } |
cfff016d | 397 | else if (STRINGP (readcharfun)) |
bed23cb2 RS |
398 | { |
399 | read_from_string_index--; | |
400 | read_from_string_index_byte | |
401 | = string_char_to_byte (readcharfun, read_from_string_index); | |
402 | } | |
ad0153e4 RS |
403 | else if (EQ (readcharfun, Qlambda)) |
404 | read_bytecode_char (1); | |
078e7b4a JB |
405 | else if (EQ (readcharfun, Qget_file_char)) |
406 | ungetc (c, instream); | |
407 | else | |
408 | call1 (readcharfun, make_number (c)); | |
409 | } | |
410 | ||
abb13b09 CW |
411 | static Lisp_Object read_internal_start P_ ((Lisp_Object, Lisp_Object, |
412 | Lisp_Object)); | |
413 | static Lisp_Object read0 P_ ((Lisp_Object)); | |
414 | static Lisp_Object read1 P_ ((Lisp_Object, int *, int)); | |
415 | ||
416 | static Lisp_Object read_list P_ ((int, Lisp_Object)); | |
417 | static Lisp_Object read_vector P_ ((Lisp_Object, int)); | |
418 | static int read_multibyte P_ ((int, Lisp_Object)); | |
419 | ||
420 | static Lisp_Object substitute_object_recurse P_ ((Lisp_Object, Lisp_Object, | |
421 | Lisp_Object)); | |
422 | static void substitute_object_in_subtree P_ ((Lisp_Object, | |
423 | Lisp_Object)); | |
424 | static void substitute_in_interval P_ ((INTERVAL, Lisp_Object)); | |
9e062b6c | 425 | |
078e7b4a | 426 | \f |
bed23cb2 | 427 | /* Get a character from the tty. */ |
078e7b4a | 428 | |
3d9b22be JB |
429 | extern Lisp_Object read_char (); |
430 | ||
f42be754 JB |
431 | /* Read input events until we get one that's acceptable for our purposes. |
432 | ||
433 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
434 | until we get a character we like, and then stuffed into | |
435 | unread_switch_frame. | |
436 | ||
437 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
438 | if the unmodified version of the symbol has a Qascii_character | |
439 | property, and use that character, if present. | |
440 | ||
441 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
442 | get isn't an ASCII character with modifiers. If it's zero but | |
443 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
bb49a192 RS |
444 | character. |
445 | ||
446 | If INPUT_METHOD is nonzero, we invoke the current input method | |
447 | if the character warrants that. */ | |
cc39bc38 | 448 | |
f42be754 | 449 | Lisp_Object |
bb49a192 RS |
450 | read_filtered_event (no_switch_frame, ascii_required, error_nonascii, |
451 | input_method) | |
452 | int no_switch_frame, ascii_required, error_nonascii, input_method; | |
f42be754 | 453 | { |
153a17b7 KH |
454 | register Lisp_Object val, delayed_switch_frame; |
455 | ||
5dbf89bc | 456 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
457 | if (display_hourglass_p) |
458 | cancel_hourglass (); | |
5dbf89bc GM |
459 | #endif |
460 | ||
153a17b7 | 461 | delayed_switch_frame = Qnil; |
f42be754 JB |
462 | |
463 | /* Read until we get an acceptable event. */ | |
464 | retry: | |
bb49a192 RS |
465 | val = read_char (0, 0, 0, |
466 | (input_method ? Qnil : Qt), | |
467 | 0); | |
f42be754 | 468 | |
cfff016d | 469 | if (BUFFERP (val)) |
6c82d689 KH |
470 | goto retry; |
471 | ||
f42be754 | 472 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 473 | character. This is better than signaling an error just because |
f42be754 JB |
474 | the last characters were typed to a separate minibuffer frame, |
475 | for example. Eventually, some code which can deal with | |
476 | switch-frame events will read it and process it. */ | |
477 | if (no_switch_frame | |
478 | && EVENT_HAS_PARAMETERS (val) | |
479 | && EQ (EVENT_HEAD (val), Qswitch_frame)) | |
480 | { | |
481 | delayed_switch_frame = val; | |
482 | goto retry; | |
483 | } | |
484 | ||
485 | if (ascii_required) | |
486 | { | |
487 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 488 | if (SYMBOLP (val)) |
f42be754 | 489 | { |
95384e1e | 490 | Lisp_Object tem, tem1; |
f42be754 JB |
491 | tem = Fget (val, Qevent_symbol_element_mask); |
492 | if (!NILP (tem)) | |
493 | { | |
494 | tem1 = Fget (Fcar (tem), Qascii_character); | |
495 | /* Merge this symbol's modifier bits | |
496 | with the ASCII equivalent of its basic code. */ | |
497 | if (!NILP (tem1)) | |
baf69866 | 498 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
499 | } |
500 | } | |
501 | ||
502 | /* If we don't have a character now, deal with it appropriately. */ | |
cfff016d | 503 | if (!INTEGERP (val)) |
f42be754 JB |
504 | { |
505 | if (error_nonascii) | |
506 | { | |
1ec84625 | 507 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
508 | error ("Non-character input-event"); |
509 | } | |
510 | else | |
511 | goto retry; | |
512 | } | |
513 | } | |
514 | ||
515 | if (! NILP (delayed_switch_frame)) | |
516 | unread_switch_frame = delayed_switch_frame; | |
517 | ||
67868d27 PJ |
518 | #if 0 |
519 | ||
5dbf89bc | 520 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
521 | if (display_hourglass_p) |
522 | start_hourglass (); | |
5dbf89bc | 523 | #endif |
67868d27 PJ |
524 | |
525 | #endif | |
526 | ||
f42be754 | 527 | return val; |
f42be754 JB |
528 | } |
529 | ||
bb49a192 | 530 | DEFUN ("read-char", Fread_char, Sread_char, 0, 2, 0, |
5de38842 PJ |
531 | doc: /* Read a character from the command input (keyboard or macro). |
532 | It is returned as a number. | |
533 | If the user generates an event which is not a character (i.e. a mouse | |
534 | click or function key event), `read-char' signals an error. As an | |
535 | exception, switch-frame events are put off until non-ASCII events can | |
536 | be read. | |
537 | If you want to read non-character events, or ignore them, call | |
538 | `read-event' or `read-char-exclusive' instead. | |
539 | ||
540 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
541 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
542 | input method is turned on in the current buffer, that input method | |
543 | is used for reading a character. */) | |
544 | (prompt, inherit_input_method) | |
fc351d2f | 545 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 546 | { |
bb49a192 RS |
547 | if (! NILP (prompt)) |
548 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 549 | return read_filtered_event (1, 1, 1, ! NILP (inherit_input_method)); |
078e7b4a JB |
550 | } |
551 | ||
bb49a192 | 552 | DEFUN ("read-event", Fread_event, Sread_event, 0, 2, 0, |
5de38842 PJ |
553 | doc: /* Read an event object from the input stream. |
554 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
555 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
556 | input method is turned on in the current buffer, that input method | |
557 | is used for reading a character. */) | |
558 | (prompt, inherit_input_method) | |
fc351d2f | 559 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 560 | { |
bb49a192 RS |
561 | if (! NILP (prompt)) |
562 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 563 | return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method)); |
078e7b4a JB |
564 | } |
565 | ||
bb49a192 | 566 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 2, 0, |
5de38842 PJ |
567 | doc: /* Read a character from the command input (keyboard or macro). |
568 | It is returned as a number. Non-character events are ignored. | |
569 | ||
570 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
571 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
572 | input method is turned on in the current buffer, that input method | |
573 | is used for reading a character. */) | |
574 | (prompt, inherit_input_method) | |
fc351d2f | 575 | Lisp_Object prompt, inherit_input_method; |
078e7b4a | 576 | { |
bb49a192 RS |
577 | if (! NILP (prompt)) |
578 | message_with_string ("%s", prompt, 0); | |
fc351d2f | 579 | return read_filtered_event (1, 1, 0, ! NILP (inherit_input_method)); |
078e7b4a | 580 | } |
078e7b4a JB |
581 | |
582 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
5de38842 PJ |
583 | doc: /* Don't use this yourself. */) |
584 | () | |
078e7b4a JB |
585 | { |
586 | register Lisp_Object val; | |
1805de4f | 587 | XSETINT (val, getc (instream)); |
078e7b4a JB |
588 | return val; |
589 | } | |
da84f340 GM |
590 | |
591 | ||
550a625e | 592 | \f |
da84f340 GM |
593 | /* Value is non-zero if the file asswociated with file descriptor FD |
594 | is a compiled Lisp file that's safe to load. Only files compiled | |
595 | with Emacs are safe to load. Files compiled with XEmacs can lead | |
596 | to a crash in Fbyte_code because of an incompatible change in the | |
597 | byte compiler. */ | |
598 | ||
599 | static int | |
600 | safe_to_load_p (fd) | |
601 | int fd; | |
602 | { | |
603 | char buf[512]; | |
604 | int nbytes, i; | |
605 | int safe_p = 1; | |
606 | ||
607 | /* Read the first few bytes from the file, and look for a line | |
608 | specifying the byte compiler version used. */ | |
609 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
610 | if (nbytes > 0) | |
611 | { | |
612 | buf[nbytes] = '\0'; | |
613 | ||
614 | /* Skip to the next newline, skipping over the initial `ELC' | |
615 | with NUL bytes following it. */ | |
616 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) | |
617 | ; | |
618 | ||
619 | if (i < nbytes | |
620 | && fast_c_string_match_ignore_case (Vbytecomp_version_regexp, | |
621 | buf + i) < 0) | |
622 | safe_p = 0; | |
623 | } | |
624 | ||
625 | lseek (fd, 0, SEEK_SET); | |
626 | return safe_p; | |
627 | } | |
628 | ||
629 | ||
7ee3bd7b GM |
630 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
631 | after loading a file successfully. */ | |
632 | ||
633 | static Lisp_Object | |
634 | record_load_unwind (old) | |
635 | Lisp_Object old; | |
636 | { | |
637 | return Vloads_in_progress = old; | |
638 | } | |
639 | ||
640 | ||
f0a50954 | 641 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
642 | doc: /* Execute a file of Lisp code named FILE. |
643 | First try FILE with `.elc' appended, then try with `.el', | |
d77b70e5 MR |
644 | then try FILE unmodified (the exact suffixes are determined by |
645 | `load-suffixes'). Environment variable references in FILE | |
5de38842 PJ |
646 | are replaced with their values by calling `substitute-in-file-name'. |
647 | This function searches the directories in `load-path'. | |
648 | If optional second arg NOERROR is non-nil, | |
649 | report no error if FILE doesn't exist. | |
650 | Print messages at start and end of loading unless | |
651 | optional third arg NOMESSAGE is non-nil. | |
652 | If optional fourth arg NOSUFFIX is non-nil, don't try adding | |
653 | suffixes `.elc' or `.el' to the specified name FILE. | |
654 | If optional fifth arg MUST-SUFFIX is non-nil, insist on | |
655 | the suffix `.elc' or `.el'; don't accept just FILE unless | |
656 | it ends in one of those suffixes or includes a directory name. | |
657 | Return t if file exists. */) | |
658 | (file, noerror, nomessage, nosuffix, must_suffix) | |
f0a50954 | 659 | Lisp_Object file, noerror, nomessage, nosuffix, must_suffix; |
078e7b4a JB |
660 | { |
661 | register FILE *stream; | |
662 | register int fd = -1; | |
663 | register Lisp_Object lispstream; | |
aed13378 | 664 | int count = SPECPDL_INDEX (); |
078e7b4a JB |
665 | Lisp_Object temp; |
666 | struct gcpro gcpro1; | |
eb191db2 | 667 | Lisp_Object found, efound; |
04fc68e7 RS |
668 | /* 1 means we printed the ".el is newer" message. */ |
669 | int newer = 0; | |
670 | /* 1 means we are loading a compiled file. */ | |
671 | int compiled = 0; | |
c2225d00 | 672 | Lisp_Object handler; |
456c67a4 | 673 | int safe_p = 1; |
229ba775 | 674 | char *fmode = "r"; |
317073d5 | 675 | #ifdef DOS_NT |
229ba775 | 676 | fmode = "rt"; |
317073d5 | 677 | #endif /* DOS_NT */ |
078e7b4a | 678 | |
b7826503 | 679 | CHECK_STRING (file); |
078e7b4a | 680 | |
c2225d00 | 681 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
682 | /* This shouldn't be necessary any more now that `openp' handles it right. |
683 | handler = Ffind_file_name_handler (file, Qload); | |
684 | if (!NILP (handler)) | |
685 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 686 | |
07a0bda3 RS |
687 | /* Do this after the handler to avoid |
688 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
689 | (Below here, we care only whether they are nil or not.) |
690 | The presence of this call is the result of a historical accident: | |
691 | it used to be in every file-operations and when it got removed | |
692 | everywhere, it accidentally stayed here. Since then, enough people | |
693 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
694 | that it seemed risky to remove. */ | |
0745dce9 | 695 | file = Fsubstitute_in_file_name (file); |
07a0bda3 | 696 | |
078e7b4a JB |
697 | /* Avoid weird lossage with null string as arg, |
698 | since it would try to load a directory as a Lisp file */ | |
d5db4077 | 699 | if (SCHARS (file) > 0) |
078e7b4a | 700 | { |
d5db4077 | 701 | int size = SBYTES (file); |
e61b9b87 | 702 | Lisp_Object tmp[2]; |
211f7dcd | 703 | |
0745dce9 | 704 | GCPRO1 (file); |
211f7dcd RS |
705 | |
706 | if (! NILP (must_suffix)) | |
707 | { | |
708 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
709 | if (size > 3 | |
d5db4077 | 710 | && !strcmp (SDATA (file) + size - 3, ".el")) |
211f7dcd RS |
711 | must_suffix = Qnil; |
712 | else if (size > 4 | |
d5db4077 | 713 | && !strcmp (SDATA (file) + size - 4, ".elc")) |
211f7dcd RS |
714 | must_suffix = Qnil; |
715 | /* Don't insist on adding a suffix | |
716 | if the argument includes a directory name. */ | |
717 | else if (! NILP (Ffile_name_directory (file))) | |
718 | must_suffix = Qnil; | |
719 | } | |
720 | ||
f0a50954 | 721 | fd = openp (Vload_path, file, |
e61b9b87 SM |
722 | (!NILP (nosuffix) ? Qnil |
723 | : !NILP (must_suffix) ? Vload_suffixes | |
724 | : Fappend (2, (tmp[0] = Vload_suffixes, | |
725 | tmp[1] = default_suffixes, | |
726 | tmp))), | |
86d00812 | 727 | &found, Qnil); |
5a6e5452 | 728 | UNGCPRO; |
078e7b4a JB |
729 | } |
730 | ||
96dc0f4e | 731 | if (fd == -1) |
078e7b4a | 732 | { |
265a9e55 | 733 | if (NILP (noerror)) |
078e7b4a JB |
734 | while (1) |
735 | Fsignal (Qfile_error, Fcons (build_string ("Cannot open load file"), | |
0745dce9 | 736 | Fcons (file, Qnil))); |
078e7b4a JB |
737 | else |
738 | return Qnil; | |
739 | } | |
740 | ||
ba0d1195 | 741 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
742 | if (EQ (Qt, Vuser_init_file)) |
743 | Vuser_init_file = found; | |
744 | ||
96dc0f4e MB |
745 | /* If FD is -2, that means openp found a magic file. */ |
746 | if (fd == -2) | |
74549846 | 747 | { |
5e24a1f7 KH |
748 | if (NILP (Fequal (found, file))) |
749 | /* If FOUND is a different file name from FILE, | |
750 | find its handler even if we have already inhibited | |
751 | the `load' operation on FILE. */ | |
752 | handler = Ffind_file_name_handler (found, Qt); | |
753 | else | |
754 | handler = Ffind_file_name_handler (found, Qload); | |
755 | if (! NILP (handler)) | |
756 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
74549846 RS |
757 | } |
758 | ||
550a625e GM |
759 | /* Check if we're stuck in a recursive load cycle. |
760 | ||
761 | 2000-09-21: It's not possible to just check for the file loaded | |
762 | being a member of Vloads_in_progress. This fails because of the | |
763 | way the byte compiler currently works; `provide's are not | |
764 | evaluted, see font-lock.el/jit-lock.el as an example. This | |
765 | leads to a certain amount of ``normal'' recursion. | |
766 | ||
767 | Also, just loading a file recursively is not always an error in | |
768 | the general case; the second load may do something different. */ | |
3ba6fd9a RS |
769 | { |
770 | int count = 0; | |
771 | Lisp_Object tem; | |
772 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
773 | if (!NILP (Fequal (found, XCAR (tem)))) | |
774 | count++; | |
775 | if (count > 3) | |
776 | Fsignal (Qerror, Fcons (build_string ("Recursive load"), | |
777 | Fcons (found, Vloads_in_progress))); | |
778 | record_unwind_protect (record_load_unwind, Vloads_in_progress); | |
779 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
780 | } | |
7ee3bd7b | 781 | |
a1c89c0a | 782 | if (!bcmp (SDATA (found) + SBYTES (found) - 4, |
96dc0f4e MB |
783 | ".elc", 4)) |
784 | /* Load .elc files directly, but not when they are | |
785 | remote and have no handler! */ | |
078e7b4a | 786 | { |
96dc0f4e | 787 | if (fd != -2) |
da84f340 | 788 | { |
96dc0f4e MB |
789 | struct stat s1, s2; |
790 | int result; | |
da84f340 | 791 | |
96dc0f4e MB |
792 | if (!safe_to_load_p (fd)) |
793 | { | |
794 | safe_p = 0; | |
795 | if (!load_dangerous_libraries) | |
e63304b7 DL |
796 | { |
797 | if (fd >= 0) | |
798 | emacs_close (fd); | |
799 | error ("File `%s' was not compiled in Emacs", | |
800 | SDATA (found)); | |
801 | } | |
96dc0f4e MB |
802 | else if (!NILP (nomessage)) |
803 | message_with_string ("File `%s' not compiled in Emacs", found, 1); | |
804 | } | |
04fc68e7 | 805 | |
96dc0f4e MB |
806 | compiled = 1; |
807 | ||
eb191db2 EZ |
808 | GCPRO1 (efound); |
809 | efound = ENCODE_FILE (found); | |
810 | ||
26fbf20b | 811 | #ifdef DOS_NT |
96dc0f4e | 812 | fmode = "rb"; |
26fbf20b | 813 | #endif /* DOS_NT */ |
d5db4077 | 814 | stat ((char *)SDATA (efound), &s1); |
a1c89c0a | 815 | SSET (efound, SBYTES (efound) - 1, 0); |
d5db4077 | 816 | result = stat ((char *)SDATA (efound), &s2); |
a1c89c0a | 817 | SSET (efound, SBYTES (efound) - 1, 'c'); |
eb191db2 EZ |
818 | UNGCPRO; |
819 | ||
96dc0f4e MB |
820 | if (result >= 0 && (unsigned) s1.st_mtime < (unsigned) s2.st_mtime) |
821 | { | |
822 | /* Make the progress messages mention that source is newer. */ | |
823 | newer = 1; | |
04fc68e7 | 824 | |
96dc0f4e | 825 | /* If we won't print another message, mention this anyway. */ |
714d8c39 GM |
826 | if (!NILP (nomessage)) |
827 | { | |
828 | Lisp_Object file; | |
829 | file = Fsubstring (found, make_number (0), make_number (-1)); | |
830 | message_with_string ("Source file `%s' newer than byte-compiled file", | |
d5db4077 | 831 | file, STRING_MULTIBYTE (file)); |
714d8c39 | 832 | } |
96dc0f4e | 833 | } |
51ac6f83 | 834 | } |
078e7b4a | 835 | } |
fe0e03f3 KH |
836 | else |
837 | { | |
838 | /* We are loading a source file (*.el). */ | |
839 | if (!NILP (Vload_source_file_function)) | |
840 | { | |
7ee3bd7b | 841 | Lisp_Object val; |
96dc0f4e MB |
842 | |
843 | if (fd >= 0) | |
68c45bf0 | 844 | emacs_close (fd); |
7ee3bd7b GM |
845 | val = call4 (Vload_source_file_function, found, file, |
846 | NILP (noerror) ? Qnil : Qt, | |
847 | NILP (nomessage) ? Qnil : Qt); | |
848 | return unbind_to (count, val); | |
fe0e03f3 KH |
849 | } |
850 | } | |
078e7b4a | 851 | |
229ba775 | 852 | #ifdef WINDOWSNT |
68c45bf0 | 853 | emacs_close (fd); |
eb191db2 EZ |
854 | GCPRO1 (efound); |
855 | efound = ENCODE_FILE (found); | |
d5db4077 | 856 | stream = fopen ((char *) SDATA (efound), fmode); |
eb191db2 | 857 | UNGCPRO; |
229ba775 EZ |
858 | #else /* not WINDOWSNT */ |
859 | stream = fdopen (fd, fmode); | |
860 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
861 | if (stream == 0) |
862 | { | |
68c45bf0 | 863 | emacs_close (fd); |
d5db4077 | 864 | error ("Failure to create stdio stream for %s", SDATA (file)); |
078e7b4a JB |
865 | } |
866 | ||
4b104c41 RS |
867 | if (! NILP (Vpurify_flag)) |
868 | Vpreloaded_file_list = Fcons (file, Vpreloaded_file_list); | |
869 | ||
04fc68e7 RS |
870 | if (NILP (nomessage)) |
871 | { | |
da84f340 GM |
872 | if (!safe_p) |
873 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
874 | file, 1); | |
875 | else if (!compiled) | |
e28552a4 | 876 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 877 | else if (newer) |
e28552a4 RS |
878 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
879 | file, 1); | |
db5cae4b | 880 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 881 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 882 | } |
078e7b4a | 883 | |
0745dce9 | 884 | GCPRO1 (file); |
838abf56 | 885 | lispstream = Fcons (Qnil, Qnil); |
f5df591a KR |
886 | XSETCARFASTINT (lispstream, (EMACS_UINT)stream >> 16); |
887 | XSETCDRFASTINT (lispstream, (EMACS_UINT)stream & 0xffff); | |
078e7b4a | 888 | record_unwind_protect (load_unwind, lispstream); |
d2c6be7f | 889 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 890 | specbind (Qload_file_name, found); |
74549846 | 891 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
892 | load_descriptor_list |
893 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
078e7b4a | 894 | load_in_progress++; |
976350af | 895 | readevalloop (Qget_file_char, stream, file, Feval, 0, Qnil, Qnil); |
078e7b4a JB |
896 | unbind_to (count, Qnil); |
897 | ||
898 | /* Run any load-hooks for this file. */ | |
0745dce9 | 899 | temp = Fassoc (file, Vafter_load_alist); |
265a9e55 | 900 | if (!NILP (temp)) |
078e7b4a JB |
901 | Fprogn (Fcdr (temp)); |
902 | UNGCPRO; | |
903 | ||
b2a30870 RS |
904 | if (saved_doc_string) |
905 | free (saved_doc_string); | |
906 | saved_doc_string = 0; | |
907 | saved_doc_string_size = 0; | |
908 | ||
c15cfd1f | 909 | if (prev_saved_doc_string) |
3cb65b0e | 910 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
911 | prev_saved_doc_string = 0; |
912 | prev_saved_doc_string_size = 0; | |
913 | ||
265a9e55 | 914 | if (!noninteractive && NILP (nomessage)) |
04fc68e7 | 915 | { |
da84f340 GM |
916 | if (!safe_p) |
917 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
918 | file, 1); | |
919 | else if (!compiled) | |
e28552a4 | 920 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 921 | else if (newer) |
e28552a4 RS |
922 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
923 | file, 1); | |
db5cae4b | 924 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 925 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 926 | } |
7ee3bd7b | 927 | |
078e7b4a JB |
928 | return Qt; |
929 | } | |
930 | ||
931 | static Lisp_Object | |
932 | load_unwind (stream) /* used as unwind-protect function in load */ | |
933 | Lisp_Object stream; | |
934 | { | |
c1d497be KR |
935 | fclose ((FILE *) (XFASTINT (XCAR (stream)) << 16 |
936 | | XFASTINT (XCDR (stream)))); | |
078e7b4a JB |
937 | if (--load_in_progress < 0) load_in_progress = 0; |
938 | return Qnil; | |
939 | } | |
940 | ||
d2c6be7f RS |
941 | static Lisp_Object |
942 | load_descriptor_unwind (oldlist) | |
943 | Lisp_Object oldlist; | |
944 | { | |
945 | load_descriptor_list = oldlist; | |
838abf56 | 946 | return Qnil; |
d2c6be7f RS |
947 | } |
948 | ||
949 | /* Close all descriptors in use for Floads. | |
950 | This is used when starting a subprocess. */ | |
951 | ||
952 | void | |
953 | close_load_descs () | |
954 | { | |
f3849f25 | 955 | #ifndef WINDOWSNT |
d2c6be7f | 956 | Lisp_Object tail; |
c1d497be | 957 | for (tail = load_descriptor_list; !NILP (tail); tail = XCDR (tail)) |
68c45bf0 | 958 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 959 | #endif |
d2c6be7f | 960 | } |
078e7b4a JB |
961 | \f |
962 | static int | |
963 | complete_filename_p (pathname) | |
964 | Lisp_Object pathname; | |
965 | { | |
4b2dd274 | 966 | register const unsigned char *s = SDATA (pathname); |
317073d5 | 967 | return (IS_DIRECTORY_SEP (s[0]) |
d5db4077 | 968 | || (SCHARS (pathname) > 2 |
317073d5 | 969 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2])) |
078e7b4a JB |
970 | #ifdef ALTOS |
971 | || *s == '@' | |
972 | #endif | |
973 | #ifdef VMS | |
974 | || index (s, ':') | |
975 | #endif /* VMS */ | |
976 | ); | |
977 | } | |
978 | ||
86d00812 SM |
979 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
980 | doc: /* Search for FILENAME through PATH. | |
981 | If SUFFIXES is non-nil, it should be a list of suffixes to append to | |
982 | file name when searching. | |
983 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
984 | PREDICATE can also be an integer to pass to the access(2) function, | |
985 | in which case file-name-handlers are ignored. */) | |
986 | (filename, path, suffixes, predicate) | |
987 | Lisp_Object filename, path, suffixes, predicate; | |
988 | { | |
989 | Lisp_Object file; | |
990 | int fd = openp (path, filename, suffixes, &file, predicate); | |
991 | if (NILP (predicate) && fd > 0) | |
992 | close (fd); | |
993 | return file; | |
994 | } | |
995 | ||
996 | ||
078e7b4a JB |
997 | /* Search for a file whose name is STR, looking in directories |
998 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
999 | On success, returns a file descriptor. On failure, returns -1. |
1000 | ||
e61b9b87 SM |
1001 | SUFFIXES is a list of strings containing possible suffixes. |
1002 | The empty suffix is automatically added iff the list is empty. | |
1003 | ||
86d00812 SM |
1004 | PREDICATE non-nil means don't open the files, |
1005 | just look for one that satisfies the predicate. In this case, | |
1006 | returns 1 on success. The predicate can be a lisp function or | |
1007 | an integer to pass to `access' (in which case file-name-handlers | |
1008 | are ignored). | |
078e7b4a JB |
1009 | |
1010 | If STOREPTR is nonzero, it points to a slot where the name of | |
1011 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
1012 | nil is stored there on failure. |
1013 | ||
96dc0f4e | 1014 | If the file we find is remote, return -2 |
86d00812 | 1015 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
1016 | |
1017 | int | |
86d00812 | 1018 | openp (path, str, suffixes, storeptr, predicate) |
078e7b4a | 1019 | Lisp_Object path, str; |
e61b9b87 | 1020 | Lisp_Object suffixes; |
078e7b4a | 1021 | Lisp_Object *storeptr; |
86d00812 | 1022 | Lisp_Object predicate; |
078e7b4a JB |
1023 | { |
1024 | register int fd; | |
1025 | int fn_size = 100; | |
1026 | char buf[100]; | |
1027 | register char *fn = buf; | |
1028 | int absolute = 0; | |
1029 | int want_size; | |
74549846 | 1030 | Lisp_Object filename; |
078e7b4a | 1031 | struct stat st; |
eb191db2 EZ |
1032 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
1033 | Lisp_Object string, tail, encoded_fn; | |
e61b9b87 SM |
1034 | int max_suffix_len = 0; |
1035 | ||
1036 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) | |
1037 | { | |
f5df591a | 1038 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1039 | max_suffix_len = max (max_suffix_len, |
d5db4077 | 1040 | SBYTES (XCAR (tail))); |
e61b9b87 | 1041 | } |
078e7b4a | 1042 | |
990ff03c | 1043 | string = filename = Qnil; |
eb191db2 EZ |
1044 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1045 | ||
078e7b4a JB |
1046 | if (storeptr) |
1047 | *storeptr = Qnil; | |
1048 | ||
1049 | if (complete_filename_p (str)) | |
1050 | absolute = 1; | |
1051 | ||
e61b9b87 | 1052 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1053 | { |
e61b9b87 | 1054 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a JB |
1055 | if (!complete_filename_p (filename)) |
1056 | /* If there are non-absolute elts in PATH (eg ".") */ | |
1057 | /* Of course, this could conceivably lose if luser sets | |
1058 | default-directory to be something non-absolute... */ | |
1059 | { | |
1060 | filename = Fexpand_file_name (filename, current_buffer->directory); | |
1061 | if (!complete_filename_p (filename)) | |
1062 | /* Give up on this path element! */ | |
1063 | continue; | |
1064 | } | |
1065 | ||
1066 | /* Calculate maximum size of any filename made from | |
1067 | this path element/specified file name and any possible suffix. */ | |
d5db4077 | 1068 | want_size = max_suffix_len + SBYTES (filename) + 1; |
078e7b4a JB |
1069 | if (fn_size < want_size) |
1070 | fn = (char *) alloca (fn_size = 100 + want_size); | |
1071 | ||
078e7b4a | 1072 | /* Loop over suffixes. */ |
e61b9b87 SM |
1073 | for (tail = NILP (suffixes) ? default_suffixes : suffixes; |
1074 | CONSP (tail); tail = XCDR (tail)) | |
078e7b4a | 1075 | { |
d5db4077 | 1076 | int lsuffix = SBYTES (XCAR (tail)); |
74549846 | 1077 | Lisp_Object handler; |
eb191db2 | 1078 | int exists; |
078e7b4a | 1079 | |
c49afcd7 RS |
1080 | /* Concatenate path element/specified name with the suffix. |
1081 | If the directory starts with /:, remove that. */ | |
d5db4077 KR |
1082 | if (SCHARS (filename) > 2 |
1083 | && SREF (filename, 0) == '/' | |
1084 | && SREF (filename, 1) == ':') | |
c49afcd7 | 1085 | { |
d5db4077 KR |
1086 | strncpy (fn, SDATA (filename) + 2, |
1087 | SBYTES (filename) - 2); | |
1088 | fn[SBYTES (filename) - 2] = 0; | |
c49afcd7 RS |
1089 | } |
1090 | else | |
1091 | { | |
d5db4077 KR |
1092 | strncpy (fn, SDATA (filename), |
1093 | SBYTES (filename)); | |
1094 | fn[SBYTES (filename)] = 0; | |
c49afcd7 RS |
1095 | } |
1096 | ||
078e7b4a | 1097 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
d5db4077 | 1098 | strncat (fn, SDATA (XCAR (tail)), lsuffix); |
eb191db2 | 1099 | |
74549846 | 1100 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1101 | /* We used to only check for handlers on non-absolute file names: |
1102 | if (absolute) | |
1103 | handler = Qnil; | |
1104 | else | |
1105 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1106 | It's not clear why that was the case and it breaks things like | |
1107 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
1108 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
eb191db2 | 1109 | string = build_string (fn); |
86d00812 SM |
1110 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1111 | { | |
1112 | if (NILP (predicate)) | |
1113 | exists = !NILP (Ffile_readable_p (string)); | |
1114 | else | |
1115 | exists = !NILP (call1 (predicate, string)); | |
eb191db2 | 1116 | if (exists && !NILP (Ffile_directory_p (string))) |
74549846 RS |
1117 | exists = 0; |
1118 | ||
1119 | if (exists) | |
078e7b4a JB |
1120 | { |
1121 | /* We succeeded; return this descriptor and filename. */ | |
1122 | if (storeptr) | |
eb191db2 | 1123 | *storeptr = string; |
5ef2a3c0 | 1124 | UNGCPRO; |
96dc0f4e | 1125 | return -2; |
74549846 RS |
1126 | } |
1127 | } | |
1128 | else | |
1129 | { | |
4b2dd274 | 1130 | const char *pfn; |
eb191db2 EZ |
1131 | |
1132 | encoded_fn = ENCODE_FILE (string); | |
d5db4077 | 1133 | pfn = SDATA (encoded_fn); |
eb191db2 EZ |
1134 | exists = (stat (pfn, &st) >= 0 |
1135 | && (st.st_mode & S_IFMT) != S_IFDIR); | |
74549846 RS |
1136 | if (exists) |
1137 | { | |
1138 | /* Check that we can access or open it. */ | |
86d00812 SM |
1139 | if (NATNUMP (predicate)) |
1140 | fd = (access (pfn, XFASTINT (predicate)) == 0) ? 1 : -1; | |
74549846 | 1141 | else |
eb191db2 | 1142 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1143 | |
1144 | if (fd >= 0) | |
1145 | { | |
1146 | /* We succeeded; return this descriptor and filename. */ | |
1147 | if (storeptr) | |
eb191db2 | 1148 | *storeptr = string; |
74549846 RS |
1149 | UNGCPRO; |
1150 | return fd; | |
1151 | } | |
078e7b4a JB |
1152 | } |
1153 | } | |
078e7b4a | 1154 | } |
5a6e5452 | 1155 | if (absolute) |
5ef2a3c0 | 1156 | break; |
078e7b4a JB |
1157 | } |
1158 | ||
5ef2a3c0 KH |
1159 | UNGCPRO; |
1160 | return -1; | |
078e7b4a JB |
1161 | } |
1162 | ||
1163 | \f | |
ae321d28 RS |
1164 | /* Merge the list we've accumulated of globals from the current input source |
1165 | into the load_history variable. The details depend on whether | |
1166 | the source has an associated file name or not. */ | |
1167 | ||
1168 | static void | |
1169 | build_load_history (stream, source) | |
1170 | FILE *stream; | |
1171 | Lisp_Object source; | |
1172 | { | |
1173 | register Lisp_Object tail, prev, newelt; | |
1174 | register Lisp_Object tem, tem2; | |
1175 | register int foundit, loading; | |
1176 | ||
1177 | loading = stream || !NARROWED; | |
1178 | ||
1179 | tail = Vload_history; | |
1180 | prev = Qnil; | |
1181 | foundit = 0; | |
86d00812 | 1182 | while (CONSP (tail)) |
ae321d28 | 1183 | { |
86d00812 | 1184 | tem = XCAR (tail); |
ae321d28 RS |
1185 | |
1186 | /* Find the feature's previous assoc list... */ | |
1187 | if (!NILP (Fequal (source, Fcar (tem)))) | |
1188 | { | |
1189 | foundit = 1; | |
1190 | ||
1191 | /* If we're loading, remove it. */ | |
1192 | if (loading) | |
86d00812 | 1193 | { |
ae321d28 | 1194 | if (NILP (prev)) |
86d00812 | 1195 | Vload_history = XCDR (tail); |
ae321d28 | 1196 | else |
86d00812 | 1197 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1198 | } |
1199 | ||
1200 | /* Otherwise, cons on new symbols that are not already members. */ | |
1201 | else | |
1202 | { | |
1203 | tem2 = Vcurrent_load_list; | |
1204 | ||
1205 | while (CONSP (tem2)) | |
1206 | { | |
86d00812 | 1207 | newelt = XCAR (tem2); |
ae321d28 | 1208 | |
d642e4f9 | 1209 | if (NILP (Fmember (newelt, tem))) |
86d00812 SM |
1210 | Fsetcar (tail, Fcons (XCAR (tem), |
1211 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1212 | |
86d00812 | 1213 | tem2 = XCDR (tem2); |
ae321d28 RS |
1214 | QUIT; |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | else | |
1219 | prev = tail; | |
86d00812 | 1220 | tail = XCDR (tail); |
ae321d28 RS |
1221 | QUIT; |
1222 | } | |
1223 | ||
8a1f1537 RS |
1224 | /* If we're loading, cons the new assoc onto the front of load-history, |
1225 | the most-recently-loaded position. Also do this if we didn't find | |
1226 | an existing member for the current source. */ | |
1227 | if (loading || !foundit) | |
1228 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), | |
1229 | Vload_history); | |
ae321d28 RS |
1230 | } |
1231 | ||
078e7b4a | 1232 | Lisp_Object |
232ccf27 DL |
1233 | unreadpure (junk) /* Used as unwind-protect function in readevalloop */ |
1234 | Lisp_Object junk; | |
078e7b4a JB |
1235 | { |
1236 | read_pure = 0; | |
1237 | return Qnil; | |
1238 | } | |
1239 | ||
94e554db RS |
1240 | static Lisp_Object |
1241 | readevalloop_1 (old) | |
1242 | Lisp_Object old; | |
1243 | { | |
1244 | load_convert_to_unibyte = ! NILP (old); | |
1245 | return Qnil; | |
1246 | } | |
1247 | ||
9c97398c GM |
1248 | /* Signal an `end-of-file' error, if possible with file name |
1249 | information. */ | |
1250 | ||
1251 | static void | |
1252 | end_of_file_error () | |
1253 | { | |
1254 | Lisp_Object data; | |
1255 | ||
1256 | if (STRINGP (Vload_file_name)) | |
1257 | data = Fcons (Vload_file_name, Qnil); | |
1258 | else | |
1259 | data = Qnil; | |
1260 | ||
1261 | Fsignal (Qend_of_file, data); | |
1262 | } | |
1263 | ||
94e554db | 1264 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af RS |
1265 | for this invocation. |
1266 | READFUN, if non-nil, is used instead of `read'. */ | |
94e554db | 1267 | |
078e7b4a | 1268 | static void |
976350af | 1269 | readevalloop (readcharfun, stream, sourcename, evalfun, printflag, unibyte, readfun) |
078e7b4a | 1270 | Lisp_Object readcharfun; |
ae321d28 RS |
1271 | FILE *stream; |
1272 | Lisp_Object sourcename; | |
078e7b4a JB |
1273 | Lisp_Object (*evalfun) (); |
1274 | int printflag; | |
976350af | 1275 | Lisp_Object unibyte, readfun; |
078e7b4a JB |
1276 | { |
1277 | register int c; | |
1278 | register Lisp_Object val; | |
aed13378 | 1279 | int count = SPECPDL_INDEX (); |
8a1f1537 | 1280 | struct gcpro gcpro1; |
49cf7ff4 | 1281 | struct buffer *b = 0; |
f38952fe | 1282 | int continue_reading_p; |
49cf7ff4 RS |
1283 | |
1284 | if (BUFFERP (readcharfun)) | |
1285 | b = XBUFFER (readcharfun); | |
1286 | else if (MARKERP (readcharfun)) | |
1287 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a JB |
1288 | |
1289 | specbind (Qstandard_input, readcharfun); | |
8a1f1537 | 1290 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1291 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1292 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1293 | |
00a9a935 | 1294 | readchar_backlog = -1; |
6f7f43d5 | 1295 | |
8a1f1537 | 1296 | GCPRO1 (sourcename); |
ae321d28 | 1297 | |
ae321d28 RS |
1298 | LOADHIST_ATTACH (sourcename); |
1299 | ||
f38952fe GM |
1300 | continue_reading_p = 1; |
1301 | while (continue_reading_p) | |
078e7b4a | 1302 | { |
49cf7ff4 RS |
1303 | if (b != 0 && NILP (b->name)) |
1304 | error ("Reading from killed buffer"); | |
1305 | ||
078e7b4a JB |
1306 | instream = stream; |
1307 | c = READCHAR; | |
1308 | if (c == ';') | |
1309 | { | |
1310 | while ((c = READCHAR) != '\n' && c != -1); | |
1311 | continue; | |
1312 | } | |
1313 | if (c < 0) break; | |
6069d957 RS |
1314 | |
1315 | /* Ignore whitespace here, so we can detect eof. */ | |
1316 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r') | |
1317 | continue; | |
078e7b4a | 1318 | |
265a9e55 | 1319 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 1320 | { |
aed13378 | 1321 | int count1 = SPECPDL_INDEX (); |
078e7b4a JB |
1322 | record_unwind_protect (unreadpure, Qnil); |
1323 | val = read_list (-1, readcharfun); | |
0e326373 | 1324 | unbind_to (count1, Qnil); |
078e7b4a JB |
1325 | } |
1326 | else | |
1327 | { | |
1328 | UNREAD (c); | |
4ad679f9 | 1329 | read_objects = Qnil; |
f38952fe GM |
1330 | if (!NILP (readfun)) |
1331 | { | |
1332 | val = call1 (readfun, readcharfun); | |
1333 | ||
1334 | /* If READCHARFUN has set point to ZV, we should | |
1335 | stop reading, even if the form read sets point | |
1336 | to a different value when evaluated. */ | |
1337 | if (BUFFERP (readcharfun)) | |
1338 | { | |
1339 | struct buffer *b = XBUFFER (readcharfun); | |
1340 | if (BUF_PT (b) == BUF_ZV (b)) | |
1341 | continue_reading_p = 0; | |
1342 | } | |
1343 | } | |
976350af | 1344 | else if (! NILP (Vload_read_function)) |
84a15045 | 1345 | val = call1 (Vload_read_function, readcharfun); |
976350af | 1346 | else |
abb13b09 | 1347 | val = read_internal_start (readcharfun, Qnil, Qnil); |
078e7b4a JB |
1348 | } |
1349 | ||
1350 | val = (*evalfun) (val); | |
f38952fe | 1351 | |
078e7b4a JB |
1352 | if (printflag) |
1353 | { | |
1354 | Vvalues = Fcons (val, Vvalues); | |
1355 | if (EQ (Vstandard_output, Qt)) | |
1356 | Fprin1 (val, Qnil); | |
1357 | else | |
1358 | Fprint (val, Qnil); | |
1359 | } | |
1360 | } | |
1361 | ||
ae321d28 | 1362 | build_load_history (stream, sourcename); |
ae321d28 RS |
1363 | UNGCPRO; |
1364 | ||
078e7b4a JB |
1365 | unbind_to (count, Qnil); |
1366 | } | |
1367 | ||
1076254d | 1368 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 PJ |
1369 | doc: /* Execute the current buffer as Lisp code. |
1370 | Programs can pass two arguments, BUFFER and PRINTFLAG. | |
1371 | BUFFER is the buffer to evaluate (nil means use current buffer). | |
1372 | PRINTFLAG controls printing of output: | |
1373 | nil means discard it; anything else is stream for print. | |
1374 | ||
1375 | If the optional third argument FILENAME is non-nil, | |
1376 | it specifies the file name to use for `load-history'. | |
1377 | The optional fourth argument UNIBYTE specifies `load-convert-to-unibyte' | |
1378 | for this invocation. | |
1379 | ||
3f9ab804 | 1380 | The optional fifth argument DO-ALLOW-PRINT, if non-nil, specifies that |
5de38842 PJ |
1381 | `print' and related functions should work normally even if PRINTFLAG is nil. |
1382 | ||
1383 | This function preserves the position of point. */) | |
1384 | (buffer, printflag, filename, unibyte, do_allow_print) | |
1076254d | 1385 | Lisp_Object buffer, printflag, filename, unibyte, do_allow_print; |
228d4b1c | 1386 | { |
aed13378 | 1387 | int count = SPECPDL_INDEX (); |
228d4b1c JA |
1388 | Lisp_Object tem, buf; |
1389 | ||
9391b698 | 1390 | if (NILP (buffer)) |
228d4b1c JA |
1391 | buf = Fcurrent_buffer (); |
1392 | else | |
9391b698 | 1393 | buf = Fget_buffer (buffer); |
dfdb645c | 1394 | if (NILP (buf)) |
13febd85 | 1395 | error ("No such buffer"); |
228d4b1c | 1396 | |
1076254d | 1397 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1398 | tem = Qsymbolp; |
1399 | else | |
1400 | tem = printflag; | |
13febd85 RS |
1401 | |
1402 | if (NILP (filename)) | |
1403 | filename = XBUFFER (buf)->filename; | |
1404 | ||
228d4b1c JA |
1405 | specbind (Qstandard_output, tem); |
1406 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1407 | BUF_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); | |
976350af | 1408 | readevalloop (buf, 0, filename, Feval, !NILP (printflag), unibyte, Qnil); |
cb09ab7a | 1409 | unbind_to (count, Qnil); |
228d4b1c JA |
1410 | |
1411 | return Qnil; | |
1412 | } | |
1413 | ||
976350af | 1414 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1415 | doc: /* Execute the region as Lisp code. |
1416 | When called from programs, expects two arguments, | |
1417 | giving starting and ending indices in the current buffer | |
1418 | of the text to be executed. | |
1419 | Programs can pass third argument PRINTFLAG which controls output: | |
1420 | nil means discard it; anything else is stream for printing it. | |
1421 | Also the fourth argument READ-FUNCTION, if non-nil, is used | |
1422 | instead of `read' to read each expression. It gets one argument | |
1423 | which is the input stream for reading characters. | |
1424 | ||
1425 | This function does not move point. */) | |
1426 | (start, end, printflag, read_function) | |
976350af | 1427 | Lisp_Object start, end, printflag, read_function; |
078e7b4a | 1428 | { |
aed13378 | 1429 | int count = SPECPDL_INDEX (); |
ae321d28 RS |
1430 | Lisp_Object tem, cbuf; |
1431 | ||
1432 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1433 | |
265a9e55 | 1434 | if (NILP (printflag)) |
078e7b4a JB |
1435 | tem = Qsymbolp; |
1436 | else | |
1437 | tem = printflag; | |
1438 | specbind (Qstandard_output, tem); | |
1439 | ||
265a9e55 | 1440 | if (NILP (printflag)) |
078e7b4a JB |
1441 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
1442 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); | |
1443 | ||
9391b698 EN |
1444 | /* This both uses start and checks its type. */ |
1445 | Fgoto_char (start); | |
1446 | Fnarrow_to_region (make_number (BEGV), end); | |
94e554db | 1447 | readevalloop (cbuf, 0, XBUFFER (cbuf)->filename, Feval, |
976350af | 1448 | !NILP (printflag), Qnil, read_function); |
078e7b4a JB |
1449 | |
1450 | return unbind_to (count, Qnil); | |
1451 | } | |
1452 | ||
078e7b4a JB |
1453 | \f |
1454 | DEFUN ("read", Fread, Sread, 0, 1, 0, | |
5de38842 PJ |
1455 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1456 | If STREAM is nil, use the value of `standard-input' (which see). | |
1457 | STREAM or the value of `standard-input' may be: | |
1458 | a buffer (read from point and advance it) | |
1459 | a marker (read from where it points and advance it) | |
1460 | a function (call it with no arguments for each character, | |
1461 | call it with a char as argument to push a char back) | |
1462 | a string (takes text from string, starting at the beginning) | |
1463 | t (read text line using minibuffer and use it, or read from | |
1464 | standard input in batch mode). */) | |
1465 | (stream) | |
5be02dff | 1466 | Lisp_Object stream; |
078e7b4a | 1467 | { |
5be02dff KH |
1468 | if (NILP (stream)) |
1469 | stream = Vstandard_input; | |
1470 | if (EQ (stream, Qt)) | |
1471 | stream = Qread_char; | |
5be02dff | 1472 | if (EQ (stream, Qread_char)) |
078e7b4a | 1473 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1474 | |
abb13b09 | 1475 | return read_internal_start (stream, Qnil, Qnil); |
078e7b4a JB |
1476 | } |
1477 | ||
1478 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, | |
5de38842 PJ |
1479 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1480 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
1481 | START and END optionally delimit a substring of STRING from which to read; | |
1482 | they default to 0 and (length STRING) respectively. */) | |
1483 | (string, start, end) | |
078e7b4a JB |
1484 | Lisp_Object string, start, end; |
1485 | { | |
2530ceaf | 1486 | Lisp_Object ret; |
b7826503 | 1487 | CHECK_STRING (string); |
2530ceaf CW |
1488 | /* read_internal_start sets read_from_string_index. */ |
1489 | ret = read_internal_start (string, start, end); | |
5135ab39 | 1490 | return Fcons (ret, make_number (read_from_string_index)); |
abb13b09 | 1491 | } |
078e7b4a | 1492 | |
abb13b09 CW |
1493 | /* Function to set up the global context we need in toplevel read |
1494 | calls. */ | |
1495 | static Lisp_Object | |
1496 | read_internal_start (stream, start, end) | |
1497 | Lisp_Object stream; | |
1498 | Lisp_Object start; /* Only used when stream is a string. */ | |
1499 | Lisp_Object end; /* Only used when stream is a string. */ | |
1500 | { | |
1501 | Lisp_Object retval; | |
078e7b4a | 1502 | |
abb13b09 CW |
1503 | readchar_backlog = -1; |
1504 | readchar_count = 0; | |
17634846 | 1505 | new_backquote_flag = 0; |
4ad679f9 | 1506 | read_objects = Qnil; |
abb13b09 CW |
1507 | if (EQ (Vread_with_symbol_positions, Qt) |
1508 | || EQ (Vread_with_symbol_positions, stream)) | |
1509 | Vread_symbol_positions_list = Qnil; | |
1510 | ||
1511 | if (STRINGP (stream)) | |
1512 | { | |
1513 | int startval, endval; | |
1514 | if (NILP (end)) | |
d5db4077 | 1515 | endval = SCHARS (stream); |
abb13b09 CW |
1516 | else |
1517 | { | |
1518 | CHECK_NUMBER (end); | |
1519 | endval = XINT (end); | |
d5db4077 | 1520 | if (endval < 0 || endval > SCHARS (stream)) |
abb13b09 CW |
1521 | args_out_of_range (stream, end); |
1522 | } | |
17634846 | 1523 | |
abb13b09 CW |
1524 | if (NILP (start)) |
1525 | startval = 0; | |
1526 | else | |
1527 | { | |
1528 | CHECK_NUMBER (start); | |
1529 | startval = XINT (start); | |
1530 | if (startval < 0 || startval > endval) | |
1531 | args_out_of_range (stream, start); | |
1532 | } | |
1533 | read_from_string_index = startval; | |
1534 | read_from_string_index_byte = string_char_to_byte (stream, startval); | |
1535 | read_from_string_limit = endval; | |
1536 | } | |
1537 | ||
1538 | retval = read0 (stream); | |
1539 | if (EQ (Vread_with_symbol_positions, Qt) | |
1540 | || EQ (Vread_with_symbol_positions, stream)) | |
1541 | Vread_symbol_positions_list = Fnreverse (Vread_symbol_positions_list); | |
1542 | return retval; | |
078e7b4a JB |
1543 | } |
1544 | \f | |
6428369f KH |
1545 | /* Use this for recursive reads, in contexts where internal tokens |
1546 | are not allowed. */ | |
e28552a4 | 1547 | |
078e7b4a JB |
1548 | static Lisp_Object |
1549 | read0 (readcharfun) | |
1550 | Lisp_Object readcharfun; | |
1551 | { | |
1552 | register Lisp_Object val; | |
e28552a4 | 1553 | int c; |
078e7b4a | 1554 | |
17634846 | 1555 | val = read1 (readcharfun, &c, 0); |
6428369f | 1556 | if (c) |
93d75e4c RS |
1557 | Fsignal (Qinvalid_read_syntax, Fcons (Fmake_string (make_number (1), |
1558 | make_number (c)), | |
e28552a4 | 1559 | Qnil)); |
078e7b4a JB |
1560 | |
1561 | return val; | |
1562 | } | |
1563 | \f | |
1564 | static int read_buffer_size; | |
1565 | static char *read_buffer; | |
1566 | ||
fe0e03f3 KH |
1567 | /* Read multibyte form and return it as a character. C is a first |
1568 | byte of multibyte form, and rest of them are read from | |
1569 | READCHARFUN. */ | |
6f7f43d5 | 1570 | |
fe0e03f3 KH |
1571 | static int |
1572 | read_multibyte (c, readcharfun) | |
1573 | register int c; | |
1574 | Lisp_Object readcharfun; | |
1575 | { | |
1576 | /* We need the actual character code of this multibyte | |
1577 | characters. */ | |
449fea39 | 1578 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
fe0e03f3 | 1579 | int len = 0; |
0d5e5843 | 1580 | int bytes; |
fe0e03f3 | 1581 | |
abb13b09 CW |
1582 | if (c < 0) |
1583 | return c; | |
1584 | ||
fe0e03f3 KH |
1585 | str[len++] = c; |
1586 | while ((c = READCHAR) >= 0xA0 | |
449fea39 | 1587 | && len < MAX_MULTIBYTE_LENGTH) |
abb13b09 CW |
1588 | { |
1589 | str[len++] = c; | |
1590 | readchar_count--; | |
1591 | } | |
fe0e03f3 | 1592 | UNREAD (c); |
0d5e5843 KH |
1593 | if (UNIBYTE_STR_AS_MULTIBYTE_P (str, len, bytes)) |
1594 | return STRING_CHAR (str, len); | |
1595 | /* The byte sequence is not valid as multibyte. Unread all bytes | |
1596 | but the first one, and return the first byte. */ | |
1597 | while (--len > 0) | |
1598 | UNREAD (str[len]); | |
1599 | return str[0]; | |
fe0e03f3 KH |
1600 | } |
1601 | ||
f6f79b37 RS |
1602 | /* Read a \-escape sequence, assuming we already read the `\'. |
1603 | If the escape sequence forces unibyte, store 1 into *BYTEREP. | |
1604 | If the escape sequence forces multibyte, store 2 into *BYTEREP. | |
1605 | Otherwise store 0 into *BYTEREP. */ | |
6f7f43d5 | 1606 | |
078e7b4a | 1607 | static int |
f6f79b37 | 1608 | read_escape (readcharfun, stringp, byterep) |
078e7b4a | 1609 | Lisp_Object readcharfun; |
e7fc914b | 1610 | int stringp; |
f6f79b37 | 1611 | int *byterep; |
078e7b4a JB |
1612 | { |
1613 | register int c = READCHAR; | |
f6f79b37 RS |
1614 | |
1615 | *byterep = 0; | |
1616 | ||
078e7b4a JB |
1617 | switch (c) |
1618 | { | |
f3849f25 | 1619 | case -1: |
da3b886d | 1620 | end_of_file_error (); |
f3849f25 | 1621 | |
078e7b4a | 1622 | case 'a': |
265a9e55 | 1623 | return '\007'; |
078e7b4a JB |
1624 | case 'b': |
1625 | return '\b'; | |
f405a585 RS |
1626 | case 'd': |
1627 | return 0177; | |
078e7b4a JB |
1628 | case 'e': |
1629 | return 033; | |
1630 | case 'f': | |
1631 | return '\f'; | |
1632 | case 'n': | |
1633 | return '\n'; | |
1634 | case 'r': | |
1635 | return '\r'; | |
1636 | case 't': | |
1637 | return '\t'; | |
1638 | case 'v': | |
1639 | return '\v'; | |
1640 | case '\n': | |
1641 | return -1; | |
e28552a4 | 1642 | case ' ': |
e7fc914b KH |
1643 | if (stringp) |
1644 | return -1; | |
1645 | return ' '; | |
078e7b4a JB |
1646 | |
1647 | case 'M': | |
1648 | c = READCHAR; | |
1649 | if (c != '-') | |
1650 | error ("Invalid escape character syntax"); | |
1651 | c = READCHAR; | |
1652 | if (c == '\\') | |
f6f79b37 | 1653 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd | 1654 | return c | meta_modifier; |
f405a585 RS |
1655 | |
1656 | case 'S': | |
1657 | c = READCHAR; | |
1658 | if (c != '-') | |
1659 | error ("Invalid escape character syntax"); | |
1660 | c = READCHAR; | |
1661 | if (c == '\\') | |
f6f79b37 | 1662 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1663 | return c | shift_modifier; |
1664 | ||
1665 | case 'H': | |
1666 | c = READCHAR; | |
1667 | if (c != '-') | |
1668 | error ("Invalid escape character syntax"); | |
1669 | c = READCHAR; | |
1670 | if (c == '\\') | |
f6f79b37 | 1671 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1672 | return c | hyper_modifier; |
1673 | ||
1674 | case 'A': | |
1675 | c = READCHAR; | |
1676 | if (c != '-') | |
1677 | error ("Invalid escape character syntax"); | |
1678 | c = READCHAR; | |
1679 | if (c == '\\') | |
f6f79b37 | 1680 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd RS |
1681 | return c | alt_modifier; |
1682 | ||
1683 | case 's': | |
1684 | c = READCHAR; | |
1685 | if (c != '-') | |
1686 | error ("Invalid escape character syntax"); | |
1687 | c = READCHAR; | |
1688 | if (c == '\\') | |
f6f79b37 | 1689 | c = read_escape (readcharfun, 0, byterep); |
7bd279cd | 1690 | return c | super_modifier; |
078e7b4a JB |
1691 | |
1692 | case 'C': | |
1693 | c = READCHAR; | |
1694 | if (c != '-') | |
1695 | error ("Invalid escape character syntax"); | |
1696 | case '^': | |
1697 | c = READCHAR; | |
1698 | if (c == '\\') | |
f6f79b37 | 1699 | c = read_escape (readcharfun, 0, byterep); |
164d590d KH |
1700 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
1701 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
1702 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
1703 | return c | ctrl_modifier; | |
f405a585 RS |
1704 | /* ASCII control chars are made from letters (both cases), |
1705 | as well as the non-letters within 0100...0137. */ | |
1706 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
1707 | return (c & (037 | ~0177)); | |
1708 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
1709 | return (c & (037 | ~0177)); | |
078e7b4a | 1710 | else |
7bd279cd | 1711 | return c | ctrl_modifier; |
078e7b4a JB |
1712 | |
1713 | case '0': | |
1714 | case '1': | |
1715 | case '2': | |
1716 | case '3': | |
1717 | case '4': | |
1718 | case '5': | |
1719 | case '6': | |
1720 | case '7': | |
1721 | /* An octal escape, as in ANSI C. */ | |
1722 | { | |
1723 | register int i = c - '0'; | |
1724 | register int count = 0; | |
1725 | while (++count < 3) | |
1726 | { | |
1727 | if ((c = READCHAR) >= '0' && c <= '7') | |
1728 | { | |
1729 | i *= 8; | |
1730 | i += c - '0'; | |
1731 | } | |
1732 | else | |
1733 | { | |
1734 | UNREAD (c); | |
1735 | break; | |
1736 | } | |
1737 | } | |
f6f79b37 RS |
1738 | |
1739 | *byterep = 1; | |
078e7b4a JB |
1740 | return i; |
1741 | } | |
1742 | ||
1743 | case 'x': | |
1744 | /* A hex escape, as in ANSI C. */ | |
1745 | { | |
1746 | int i = 0; | |
1747 | while (1) | |
1748 | { | |
1749 | c = READCHAR; | |
1750 | if (c >= '0' && c <= '9') | |
1751 | { | |
1752 | i *= 16; | |
1753 | i += c - '0'; | |
1754 | } | |
1755 | else if ((c >= 'a' && c <= 'f') | |
1756 | || (c >= 'A' && c <= 'F')) | |
1757 | { | |
1758 | i *= 16; | |
1759 | if (c >= 'a' && c <= 'f') | |
1760 | i += c - 'a' + 10; | |
1761 | else | |
1762 | i += c - 'A' + 10; | |
1763 | } | |
1764 | else | |
1765 | { | |
1766 | UNREAD (c); | |
1767 | break; | |
1768 | } | |
1769 | } | |
f6f79b37 RS |
1770 | |
1771 | *byterep = 2; | |
078e7b4a JB |
1772 | return i; |
1773 | } | |
1774 | ||
1775 | default: | |
fe0e03f3 KH |
1776 | if (BASE_LEADING_CODE_P (c)) |
1777 | c = read_multibyte (c, readcharfun); | |
078e7b4a JB |
1778 | return c; |
1779 | } | |
1780 | } | |
1781 | ||
bf5d1a17 GM |
1782 | |
1783 | /* Read an integer in radix RADIX using READCHARFUN to read | |
1784 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
1785 | read error is signaled . Value is the integer read. Signals an | |
1786 | error if encountering invalid read syntax or if RADIX is out of | |
1787 | range. */ | |
1788 | ||
1789 | static Lisp_Object | |
1790 | read_integer (readcharfun, radix) | |
1791 | Lisp_Object readcharfun; | |
1792 | int radix; | |
1793 | { | |
5e37dc22 GM |
1794 | int ndigits = 0, invalid_p, c, sign = 0; |
1795 | EMACS_INT number = 0; | |
bf5d1a17 GM |
1796 | |
1797 | if (radix < 2 || radix > 36) | |
1798 | invalid_p = 1; | |
1799 | else | |
1800 | { | |
1801 | number = ndigits = invalid_p = 0; | |
1802 | sign = 1; | |
1803 | ||
1804 | c = READCHAR; | |
1805 | if (c == '-') | |
1806 | { | |
1807 | c = READCHAR; | |
1808 | sign = -1; | |
1809 | } | |
1810 | else if (c == '+') | |
1811 | c = READCHAR; | |
1812 | ||
1813 | while (c >= 0) | |
1814 | { | |
1815 | int digit; | |
1816 | ||
1817 | if (c >= '0' && c <= '9') | |
1818 | digit = c - '0'; | |
1819 | else if (c >= 'a' && c <= 'z') | |
1820 | digit = c - 'a' + 10; | |
1821 | else if (c >= 'A' && c <= 'Z') | |
1822 | digit = c - 'A' + 10; | |
1823 | else | |
b632fa48 GM |
1824 | { |
1825 | UNREAD (c); | |
1826 | break; | |
1827 | } | |
bf5d1a17 GM |
1828 | |
1829 | if (digit < 0 || digit >= radix) | |
1830 | invalid_p = 1; | |
1831 | ||
1832 | number = radix * number + digit; | |
1833 | ++ndigits; | |
1834 | c = READCHAR; | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | if (ndigits == 0 || invalid_p) | |
1839 | { | |
1840 | char buf[50]; | |
1841 | sprintf (buf, "integer, radix %d", radix); | |
1842 | Fsignal (Qinvalid_read_syntax, Fcons (build_string (buf), Qnil)); | |
1843 | } | |
1844 | ||
1845 | return make_number (sign * number); | |
1846 | } | |
1847 | ||
1848 | ||
a742d646 GM |
1849 | /* Convert unibyte text in read_buffer to multibyte. |
1850 | ||
1851 | Initially, *P is a pointer after the end of the unibyte text, and | |
1852 | the pointer *END points after the end of read_buffer. | |
1853 | ||
1854 | If read_buffer doesn't have enough room to hold the result | |
1855 | of the conversion, reallocate it and adjust *P and *END. | |
1856 | ||
1857 | At the end, make *P point after the result of the conversion, and | |
1858 | return in *NCHARS the number of characters in the converted | |
1859 | text. */ | |
1860 | ||
1861 | static void | |
1862 | to_multibyte (p, end, nchars) | |
1863 | char **p, **end; | |
1864 | int *nchars; | |
1865 | { | |
1866 | int nbytes; | |
1867 | ||
1868 | parse_str_as_multibyte (read_buffer, *p - read_buffer, &nbytes, nchars); | |
b4a3be43 | 1869 | if (read_buffer_size < 2 * nbytes) |
a742d646 GM |
1870 | { |
1871 | int offset = *p - read_buffer; | |
fe957e65 | 1872 | read_buffer_size = 2 * max (read_buffer_size, nbytes); |
a742d646 GM |
1873 | read_buffer = (char *) xrealloc (read_buffer, read_buffer_size); |
1874 | *p = read_buffer + offset; | |
1875 | *end = read_buffer + read_buffer_size; | |
1876 | } | |
1877 | ||
1878 | if (nbytes != *nchars) | |
1879 | nbytes = str_as_multibyte (read_buffer, read_buffer_size, | |
1880 | *p - read_buffer, nchars); | |
1881 | ||
1882 | *p = read_buffer + nbytes; | |
1883 | } | |
1884 | ||
1885 | ||
6428369f KH |
1886 | /* If the next token is ')' or ']' or '.', we store that character |
1887 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
1888 | zero in *PCH and we read and return one lisp object. |
1889 | ||
1890 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
1891 | ||
078e7b4a | 1892 | static Lisp_Object |
17634846 | 1893 | read1 (readcharfun, pch, first_in_list) |
078e7b4a | 1894 | register Lisp_Object readcharfun; |
e28552a4 | 1895 | int *pch; |
17634846 | 1896 | int first_in_list; |
078e7b4a JB |
1897 | { |
1898 | register int c; | |
4ad679f9 EN |
1899 | int uninterned_symbol = 0; |
1900 | ||
6428369f | 1901 | *pch = 0; |
078e7b4a JB |
1902 | |
1903 | retry: | |
1904 | ||
1905 | c = READCHAR; | |
9c97398c GM |
1906 | if (c < 0) |
1907 | end_of_file_error (); | |
078e7b4a JB |
1908 | |
1909 | switch (c) | |
1910 | { | |
1911 | case '(': | |
1912 | return read_list (0, readcharfun); | |
1913 | ||
1914 | case '[': | |
c15cfd1f | 1915 | return read_vector (readcharfun, 0); |
078e7b4a JB |
1916 | |
1917 | case ')': | |
1918 | case ']': | |
078e7b4a | 1919 | { |
6428369f KH |
1920 | *pch = c; |
1921 | return Qnil; | |
078e7b4a JB |
1922 | } |
1923 | ||
1924 | case '#': | |
200f684e | 1925 | c = READCHAR; |
c2390933 RS |
1926 | if (c == '^') |
1927 | { | |
1928 | c = READCHAR; | |
1929 | if (c == '[') | |
1930 | { | |
1931 | Lisp_Object tmp; | |
c15cfd1f | 1932 | tmp = read_vector (readcharfun, 0); |
c2390933 RS |
1933 | if (XVECTOR (tmp)->size < CHAR_TABLE_STANDARD_SLOTS |
1934 | || XVECTOR (tmp)->size > CHAR_TABLE_STANDARD_SLOTS + 10) | |
1935 | error ("Invalid size char-table"); | |
1936 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); | |
3701b5de | 1937 | XCHAR_TABLE (tmp)->top = Qt; |
c2390933 RS |
1938 | return tmp; |
1939 | } | |
3701b5de KH |
1940 | else if (c == '^') |
1941 | { | |
1942 | c = READCHAR; | |
1943 | if (c == '[') | |
1944 | { | |
1945 | Lisp_Object tmp; | |
c15cfd1f | 1946 | tmp = read_vector (readcharfun, 0); |
3701b5de KH |
1947 | if (XVECTOR (tmp)->size != SUB_CHAR_TABLE_STANDARD_SLOTS) |
1948 | error ("Invalid size char-table"); | |
1949 | XSETCHAR_TABLE (tmp, XCHAR_TABLE (tmp)); | |
1950 | XCHAR_TABLE (tmp)->top = Qnil; | |
1951 | return tmp; | |
1952 | } | |
1953 | Fsignal (Qinvalid_read_syntax, | |
1954 | Fcons (make_string ("#^^", 3), Qnil)); | |
1955 | } | |
c2390933 RS |
1956 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#^", 2), Qnil)); |
1957 | } | |
1958 | if (c == '&') | |
1959 | { | |
1960 | Lisp_Object length; | |
1961 | length = read1 (readcharfun, pch, first_in_list); | |
1962 | c = READCHAR; | |
1963 | if (c == '"') | |
1964 | { | |
1965 | Lisp_Object tmp, val; | |
90ed3ec5 | 1966 | int size_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) |
68be917d | 1967 | / BITS_PER_CHAR); |
c2390933 RS |
1968 | |
1969 | UNREAD (c); | |
1970 | tmp = read1 (readcharfun, pch, first_in_list); | |
d5db4077 | 1971 | if (size_in_chars != SCHARS (tmp) |
90ed3ec5 RS |
1972 | /* We used to print 1 char too many |
1973 | when the number of bits was a multiple of 8. | |
1974 | Accept such input in case it came from an old version. */ | |
1975 | && ! (XFASTINT (length) | |
d5db4077 | 1976 | == (SCHARS (tmp) - 1) * BITS_PER_CHAR)) |
c2390933 | 1977 | Fsignal (Qinvalid_read_syntax, |
ec3bbd7d | 1978 | Fcons (make_string ("#&...", 5), Qnil)); |
c2390933 RS |
1979 | |
1980 | val = Fmake_bool_vector (length, Qnil); | |
d5db4077 | 1981 | bcopy (SDATA (tmp), XBOOL_VECTOR (val)->data, |
c2390933 | 1982 | size_in_chars); |
67d3b149 EZ |
1983 | /* Clear the extraneous bits in the last byte. */ |
1984 | if (XINT (length) != size_in_chars * BITS_PER_CHAR) | |
1985 | XBOOL_VECTOR (val)->data[size_in_chars - 1] | |
1986 | &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1; | |
c2390933 RS |
1987 | return val; |
1988 | } | |
ec3bbd7d | 1989 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#&...", 5), |
039dc30b | 1990 | Qnil)); |
c2390933 | 1991 | } |
200f684e RS |
1992 | if (c == '[') |
1993 | { | |
1994 | /* Accept compiled functions at read-time so that we don't have to | |
1995 | build them using function calls. */ | |
748ef62f | 1996 | Lisp_Object tmp; |
c15cfd1f | 1997 | tmp = read_vector (readcharfun, 1); |
748ef62f RS |
1998 | return Fmake_byte_code (XVECTOR (tmp)->size, |
1999 | XVECTOR (tmp)->contents); | |
200f684e | 2000 | } |
748ef62f RS |
2001 | if (c == '(') |
2002 | { | |
2003 | Lisp_Object tmp; | |
2004 | struct gcpro gcpro1; | |
e28552a4 | 2005 | int ch; |
748ef62f RS |
2006 | |
2007 | /* Read the string itself. */ | |
17634846 | 2008 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 2009 | if (ch != 0 || !STRINGP (tmp)) |
748ef62f RS |
2010 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
2011 | GCPRO1 (tmp); | |
2012 | /* Read the intervals and their properties. */ | |
2013 | while (1) | |
2014 | { | |
2015 | Lisp_Object beg, end, plist; | |
2016 | ||
17634846 | 2017 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 2018 | end = plist = Qnil; |
6428369f KH |
2019 | if (ch == ')') |
2020 | break; | |
2021 | if (ch == 0) | |
17634846 | 2022 | end = read1 (readcharfun, &ch, 0); |
6428369f | 2023 | if (ch == 0) |
17634846 | 2024 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 2025 | if (ch) |
748ef62f | 2026 | Fsignal (Qinvalid_read_syntax, |
6428369f KH |
2027 | Fcons (build_string ("invalid string property list"), |
2028 | Qnil)); | |
748ef62f RS |
2029 | Fset_text_properties (beg, end, plist, tmp); |
2030 | } | |
2031 | UNGCPRO; | |
2032 | return tmp; | |
2033 | } | |
339ee979 | 2034 | |
20ea2964 RS |
2035 | /* #@NUMBER is used to skip NUMBER following characters. |
2036 | That's used in .elc files to skip over doc strings | |
2037 | and function definitions. */ | |
2038 | if (c == '@') | |
2039 | { | |
2040 | int i, nskip = 0; | |
2041 | ||
2042 | /* Read a decimal integer. */ | |
2043 | while ((c = READCHAR) >= 0 | |
2044 | && c >= '0' && c <= '9') | |
2045 | { | |
2046 | nskip *= 10; | |
2047 | nskip += c - '0'; | |
2048 | } | |
2049 | if (c >= 0) | |
2050 | UNREAD (c); | |
2051 | ||
b2a30870 RS |
2052 | if (load_force_doc_strings && EQ (readcharfun, Qget_file_char)) |
2053 | { | |
2054 | /* If we are supposed to force doc strings into core right now, | |
2055 | record the last string that we skipped, | |
2056 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2057 | |
2058 | /* But first exchange saved_doc_string | |
2059 | with prev_saved_doc_string, so we save two strings. */ | |
2060 | { | |
2061 | char *temp = saved_doc_string; | |
2062 | int temp_size = saved_doc_string_size; | |
68c45bf0 | 2063 | file_offset temp_pos = saved_doc_string_position; |
c15cfd1f RS |
2064 | int temp_len = saved_doc_string_length; |
2065 | ||
2066 | saved_doc_string = prev_saved_doc_string; | |
2067 | saved_doc_string_size = prev_saved_doc_string_size; | |
2068 | saved_doc_string_position = prev_saved_doc_string_position; | |
2069 | saved_doc_string_length = prev_saved_doc_string_length; | |
2070 | ||
2071 | prev_saved_doc_string = temp; | |
2072 | prev_saved_doc_string_size = temp_size; | |
2073 | prev_saved_doc_string_position = temp_pos; | |
2074 | prev_saved_doc_string_length = temp_len; | |
2075 | } | |
2076 | ||
b2a30870 RS |
2077 | if (saved_doc_string_size == 0) |
2078 | { | |
2079 | saved_doc_string_size = nskip + 100; | |
11938f10 | 2080 | saved_doc_string = (char *) xmalloc (saved_doc_string_size); |
b2a30870 RS |
2081 | } |
2082 | if (nskip > saved_doc_string_size) | |
2083 | { | |
2084 | saved_doc_string_size = nskip + 100; | |
11938f10 KH |
2085 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
2086 | saved_doc_string_size); | |
b2a30870 RS |
2087 | } |
2088 | ||
68c45bf0 | 2089 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2090 | |
2091 | /* Copy that many characters into saved_doc_string. */ | |
2092 | for (i = 0; i < nskip && c >= 0; i++) | |
2093 | saved_doc_string[i] = c = READCHAR; | |
2094 | ||
2095 | saved_doc_string_length = i; | |
2096 | } | |
2097 | else | |
b2a30870 RS |
2098 | { |
2099 | /* Skip that many characters. */ | |
2100 | for (i = 0; i < nskip && c >= 0; i++) | |
2101 | c = READCHAR; | |
2102 | } | |
d49f0c1a | 2103 | |
20ea2964 RS |
2104 | goto retry; |
2105 | } | |
e2518d02 RS |
2106 | if (c == '!') |
2107 | { | |
2108 | /* #! appears at the beginning of an executable file. | |
2109 | Skip the first line. */ | |
2110 | while (c != '\n') | |
2111 | c = READCHAR; | |
2112 | goto retry; | |
2113 | } | |
20ea2964 RS |
2114 | if (c == '$') |
2115 | return Vload_file_name; | |
2b6cae0c RS |
2116 | if (c == '\'') |
2117 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2118 | /* #:foo is the uninterned symbol named foo. */ |
2119 | if (c == ':') | |
2120 | { | |
2121 | uninterned_symbol = 1; | |
2122 | c = READCHAR; | |
2123 | goto default_label; | |
2124 | } | |
2125 | /* Reader forms that can reuse previously read objects. */ | |
2126 | if (c >= '0' && c <= '9') | |
2127 | { | |
2128 | int n = 0; | |
2129 | Lisp_Object tem; | |
2b6cae0c | 2130 | |
4ad679f9 EN |
2131 | /* Read a non-negative integer. */ |
2132 | while (c >= '0' && c <= '9') | |
2133 | { | |
2134 | n *= 10; | |
2135 | n += c - '0'; | |
2136 | c = READCHAR; | |
2137 | } | |
2138 | /* #n=object returns object, but associates it with n for #n#. */ | |
2139 | if (c == '=') | |
2140 | { | |
9e062b6c RS |
2141 | /* Make a placeholder for #n# to use temporarily */ |
2142 | Lisp_Object placeholder; | |
2143 | Lisp_Object cell; | |
2144 | ||
2145 | placeholder = Fcons(Qnil, Qnil); | |
2146 | cell = Fcons (make_number (n), placeholder); | |
2147 | read_objects = Fcons (cell, read_objects); | |
2148 | ||
2149 | /* Read the object itself. */ | |
4ad679f9 | 2150 | tem = read0 (readcharfun); |
9e062b6c RS |
2151 | |
2152 | /* Now put it everywhere the placeholder was... */ | |
2153 | substitute_object_in_subtree (tem, placeholder); | |
2154 | ||
2155 | /* ...and #n# will use the real value from now on. */ | |
2156 | Fsetcdr (cell, tem); | |
2157 | ||
4ad679f9 EN |
2158 | return tem; |
2159 | } | |
2160 | /* #n# returns a previously read object. */ | |
2161 | if (c == '#') | |
2162 | { | |
2163 | tem = Fassq (make_number (n), read_objects); | |
2164 | if (CONSP (tem)) | |
2165 | return XCDR (tem); | |
2166 | /* Fall through to error message. */ | |
2167 | } | |
bf5d1a17 GM |
2168 | else if (c == 'r' || c == 'R') |
2169 | return read_integer (readcharfun, n); | |
2170 | ||
4ad679f9 EN |
2171 | /* Fall through to error message. */ |
2172 | } | |
bf5d1a17 GM |
2173 | else if (c == 'x' || c == 'X') |
2174 | return read_integer (readcharfun, 16); | |
2175 | else if (c == 'o' || c == 'O') | |
2176 | return read_integer (readcharfun, 8); | |
2177 | else if (c == 'b' || c == 'B') | |
2178 | return read_integer (readcharfun, 2); | |
20ea2964 | 2179 | |
200f684e | 2180 | UNREAD (c); |
748ef62f | 2181 | Fsignal (Qinvalid_read_syntax, Fcons (make_string ("#", 1), Qnil)); |
078e7b4a JB |
2182 | |
2183 | case ';': | |
2184 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2185 | goto retry; | |
2186 | ||
2187 | case '\'': | |
2188 | { | |
2189 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2190 | } | |
2191 | ||
17634846 RS |
2192 | case '`': |
2193 | if (first_in_list) | |
2194 | goto default_label; | |
2195 | else | |
2196 | { | |
2197 | Lisp_Object value; | |
2198 | ||
0ffbbdeb | 2199 | new_backquote_flag++; |
17634846 | 2200 | value = read0 (readcharfun); |
0ffbbdeb | 2201 | new_backquote_flag--; |
17634846 RS |
2202 | |
2203 | return Fcons (Qbackquote, Fcons (value, Qnil)); | |
2204 | } | |
2205 | ||
2206 | case ',': | |
2207 | if (new_backquote_flag) | |
2208 | { | |
2209 | Lisp_Object comma_type = Qnil; | |
2210 | Lisp_Object value; | |
2211 | int ch = READCHAR; | |
2212 | ||
2213 | if (ch == '@') | |
2214 | comma_type = Qcomma_at; | |
2215 | else if (ch == '.') | |
2216 | comma_type = Qcomma_dot; | |
2217 | else | |
2218 | { | |
2219 | if (ch >= 0) UNREAD (ch); | |
2220 | comma_type = Qcomma; | |
2221 | } | |
2222 | ||
0ffbbdeb | 2223 | new_backquote_flag--; |
17634846 | 2224 | value = read0 (readcharfun); |
0ffbbdeb | 2225 | new_backquote_flag++; |
17634846 RS |
2226 | return Fcons (comma_type, Fcons (value, Qnil)); |
2227 | } | |
2228 | else | |
2229 | goto default_label; | |
2230 | ||
078e7b4a JB |
2231 | case '?': |
2232 | { | |
f6f79b37 RS |
2233 | int discard; |
2234 | ||
078e7b4a | 2235 | c = READCHAR; |
9c97398c GM |
2236 | if (c < 0) |
2237 | end_of_file_error (); | |
078e7b4a JB |
2238 | |
2239 | if (c == '\\') | |
f6f79b37 | 2240 | c = read_escape (readcharfun, 0, &discard); |
fe0e03f3 KH |
2241 | else if (BASE_LEADING_CODE_P (c)) |
2242 | c = read_multibyte (c, readcharfun); | |
078e7b4a | 2243 | |
6f7f43d5 | 2244 | return make_number (c); |
078e7b4a JB |
2245 | } |
2246 | ||
00a9a935 | 2247 | case '"': |
078e7b4a | 2248 | { |
a742d646 GM |
2249 | char *p = read_buffer; |
2250 | char *end = read_buffer + read_buffer_size; | |
078e7b4a | 2251 | register int c; |
5150eeec RS |
2252 | /* 1 if we saw an escape sequence specifying |
2253 | a multibyte character, or a multibyte character. */ | |
e7fc914b | 2254 | int force_multibyte = 0; |
5150eeec | 2255 | /* 1 if we saw an escape sequence specifying |
e7fc914b KH |
2256 | a single-byte character. */ |
2257 | int force_singlebyte = 0; | |
5150eeec RS |
2258 | /* 1 if read_buffer contains multibyte text now. */ |
2259 | int is_multibyte = 0; | |
078e7b4a | 2260 | int cancel = 0; |
5150eeec | 2261 | int nchars = 0; |
078e7b4a JB |
2262 | |
2263 | while ((c = READCHAR) >= 0 | |
2264 | && c != '\"') | |
2265 | { | |
449fea39 | 2266 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2267 | { |
5d65df0d GM |
2268 | int offset = p - read_buffer; |
2269 | read_buffer = (char *) xrealloc (read_buffer, | |
2270 | read_buffer_size *= 2); | |
2271 | p = read_buffer + offset; | |
078e7b4a JB |
2272 | end = read_buffer + read_buffer_size; |
2273 | } | |
bed23cb2 | 2274 | |
078e7b4a | 2275 | if (c == '\\') |
03e88613 | 2276 | { |
f6f79b37 RS |
2277 | int byterep; |
2278 | ||
2279 | c = read_escape (readcharfun, 1, &byterep); | |
bed23cb2 RS |
2280 | |
2281 | /* C is -1 if \ newline has just been seen */ | |
2282 | if (c == -1) | |
03e88613 | 2283 | { |
bed23cb2 RS |
2284 | if (p == read_buffer) |
2285 | cancel = 1; | |
03e88613 RS |
2286 | continue; |
2287 | } | |
bed23cb2 | 2288 | |
f6f79b37 | 2289 | if (byterep == 1) |
e7fc914b | 2290 | force_singlebyte = 1; |
f6f79b37 RS |
2291 | else if (byterep == 2) |
2292 | force_multibyte = 1; | |
03e88613 | 2293 | } |
6f7f43d5 | 2294 | |
5150eeec RS |
2295 | /* A character that must be multibyte forces multibyte. */ |
2296 | if (! SINGLE_BYTE_CHAR_P (c & ~CHAR_MODIFIER_MASK)) | |
2297 | force_multibyte = 1; | |
2298 | ||
2299 | /* If we just discovered the need to be multibyte, | |
2300 | convert the text accumulated thus far. */ | |
2301 | if (force_multibyte && ! is_multibyte) | |
078e7b4a | 2302 | { |
5150eeec RS |
2303 | is_multibyte = 1; |
2304 | to_multibyte (&p, &end, &nchars); | |
078e7b4a | 2305 | } |
988c2f83 | 2306 | |
5150eeec RS |
2307 | /* Allow `\C- ' and `\C-?'. */ |
2308 | if (c == (CHAR_CTL | ' ')) | |
2309 | c = 0; | |
2310 | else if (c == (CHAR_CTL | '?')) | |
2311 | c = 127; | |
164d590d | 2312 | |
5150eeec RS |
2313 | if (c & CHAR_SHIFT) |
2314 | { | |
2315 | /* Shift modifier is valid only with [A-Za-z]. */ | |
2316 | if ((c & 0377) >= 'A' && (c & 0377) <= 'Z') | |
2317 | c &= ~CHAR_SHIFT; | |
2318 | else if ((c & 0377) >= 'a' && (c & 0377) <= 'z') | |
2319 | c = (c & ~CHAR_SHIFT) - ('a' - 'A'); | |
f943104a | 2320 | } |
5150eeec RS |
2321 | |
2322 | if (c & CHAR_META) | |
2323 | /* Move the meta bit to the right place for a string. */ | |
2324 | c = (c & ~CHAR_META) | 0x80; | |
2325 | if (c & CHAR_MODIFIER_MASK) | |
2326 | error ("Invalid modifier in string"); | |
2327 | ||
2328 | if (is_multibyte) | |
2329 | p += CHAR_STRING (c, p); | |
2330 | else | |
2331 | *p++ = c; | |
2332 | ||
2333 | nchars++; | |
078e7b4a | 2334 | } |
5150eeec | 2335 | |
6f7f43d5 | 2336 | if (c < 0) |
9c97398c | 2337 | end_of_file_error (); |
078e7b4a JB |
2338 | |
2339 | /* If purifying, and string starts with \ newline, | |
2340 | return zero instead. This is for doc strings | |
08564963 | 2341 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 2342 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2343 | return make_number (0); |
2344 | ||
5150eeec RS |
2345 | if (is_multibyte || force_singlebyte) |
2346 | ; | |
94e554db RS |
2347 | else if (load_convert_to_unibyte) |
2348 | { | |
2349 | Lisp_Object string; | |
a742d646 | 2350 | to_multibyte (&p, &end, &nchars); |
94e554db RS |
2351 | if (p - read_buffer != nchars) |
2352 | { | |
2353 | string = make_multibyte_string (read_buffer, nchars, | |
2354 | p - read_buffer); | |
2355 | return Fstring_make_unibyte (string); | |
2356 | } | |
5150eeec RS |
2357 | /* We can make a unibyte string directly. */ |
2358 | is_multibyte = 0; | |
94e554db | 2359 | } |
8db9dc66 RS |
2360 | else if (EQ (readcharfun, Qget_file_char) |
2361 | || EQ (readcharfun, Qlambda)) | |
a742d646 GM |
2362 | { |
2363 | /* Nowadays, reading directly from a file is used only for | |
2364 | compiled Emacs Lisp files, and those always use the | |
2365 | Emacs internal encoding. Meanwhile, Qlambda is used | |
2366 | for reading dynamic byte code (compiled with | |
81a268b4 RS |
2367 | byte-compile-dynamic = t). So make the string multibyte |
2368 | if the string contains any multibyte sequences. | |
2369 | (to_multibyte is a no-op if not.) */ | |
a742d646 | 2370 | to_multibyte (&p, &end, &nchars); |
81a268b4 | 2371 | is_multibyte = (p - read_buffer) != nchars; |
a742d646 | 2372 | } |
e28552a4 | 2373 | else |
bed23cb2 RS |
2374 | /* In all other cases, if we read these bytes as |
2375 | separate characters, treat them as separate characters now. */ | |
5150eeec | 2376 | ; |
e7fc914b | 2377 | |
abb13b09 CW |
2378 | /* We want readchar_count to be the number of characters, not |
2379 | bytes. Hence we adjust for multibyte characters in the | |
2380 | string. ... But it doesn't seem to be necessary, because | |
2381 | READCHAR *does* read multibyte characters from buffers. */ | |
2382 | /* readchar_count -= (p - read_buffer) - nchars; */ | |
e7fc914b | 2383 | if (read_pure) |
491f16a2 | 2384 | return make_pure_string (read_buffer, nchars, p - read_buffer, |
5150eeec | 2385 | is_multibyte); |
491f16a2 | 2386 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
5150eeec | 2387 | is_multibyte); |
078e7b4a JB |
2388 | } |
2389 | ||
109d300c JB |
2390 | case '.': |
2391 | { | |
109d300c JB |
2392 | int next_char = READCHAR; |
2393 | UNREAD (next_char); | |
2394 | ||
035eec48 GM |
2395 | if (next_char <= 040 |
2396 | || index ("\"'`,(", next_char)) | |
109d300c | 2397 | { |
6428369f KH |
2398 | *pch = c; |
2399 | return Qnil; | |
109d300c JB |
2400 | } |
2401 | ||
2402 | /* Otherwise, we fall through! Note that the atom-reading loop | |
2403 | below will now loop at least once, assuring that we will not | |
2404 | try to UNREAD two characters in a row. */ | |
2405 | } | |
078e7b4a | 2406 | default: |
17634846 | 2407 | default_label: |
078e7b4a JB |
2408 | if (c <= 040) goto retry; |
2409 | { | |
38404229 | 2410 | char *p = read_buffer; |
481c6336 | 2411 | int quoted = 0; |
078e7b4a JB |
2412 | |
2413 | { | |
38404229 | 2414 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 2415 | |
6f7f43d5 | 2416 | while (c > 040 |
38404229 | 2417 | && !(c == '\"' || c == '\'' || c == ';' |
6f7f43d5 | 2418 | || c == '(' || c == ')' |
38404229 | 2419 | || c == '[' || c == ']' || c == '#')) |
078e7b4a | 2420 | { |
449fea39 | 2421 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2422 | { |
5d65df0d GM |
2423 | int offset = p - read_buffer; |
2424 | read_buffer = (char *) xrealloc (read_buffer, | |
2425 | read_buffer_size *= 2); | |
2426 | p = read_buffer + offset; | |
078e7b4a JB |
2427 | end = read_buffer + read_buffer_size; |
2428 | } | |
38404229 | 2429 | |
078e7b4a | 2430 | if (c == '\\') |
481c6336 RS |
2431 | { |
2432 | c = READCHAR; | |
4ab11c09 GM |
2433 | if (c == -1) |
2434 | end_of_file_error (); | |
481c6336 RS |
2435 | quoted = 1; |
2436 | } | |
6f7f43d5 | 2437 | |
bed23cb2 | 2438 | if (! SINGLE_BYTE_CHAR_P (c)) |
449fea39 | 2439 | p += CHAR_STRING (c, p); |
bed23cb2 RS |
2440 | else |
2441 | *p++ = c; | |
6f7f43d5 | 2442 | |
078e7b4a JB |
2443 | c = READCHAR; |
2444 | } | |
2445 | ||
2446 | if (p == end) | |
2447 | { | |
5d65df0d GM |
2448 | int offset = p - read_buffer; |
2449 | read_buffer = (char *) xrealloc (read_buffer, | |
2450 | read_buffer_size *= 2); | |
2451 | p = read_buffer + offset; | |
2452 | end = read_buffer + read_buffer_size; | |
078e7b4a JB |
2453 | } |
2454 | *p = 0; | |
2455 | if (c >= 0) | |
2456 | UNREAD (c); | |
2457 | } | |
2458 | ||
4ad679f9 | 2459 | if (!quoted && !uninterned_symbol) |
481c6336 RS |
2460 | { |
2461 | register char *p1; | |
2462 | register Lisp_Object val; | |
2463 | p1 = read_buffer; | |
2464 | if (*p1 == '+' || *p1 == '-') p1++; | |
2465 | /* Is it an integer? */ | |
2466 | if (p1 != p) | |
2467 | { | |
2468 | while (p1 != p && (c = *p1) >= '0' && c <= '9') p1++; | |
481c6336 RS |
2469 | /* Integers can have trailing decimal points. */ |
2470 | if (p1 > read_buffer && p1 < p && *p1 == '.') p1++; | |
481c6336 RS |
2471 | if (p1 == p) |
2472 | /* It is an integer. */ | |
2473 | { | |
481c6336 RS |
2474 | if (p1[-1] == '.') |
2475 | p1[-1] = '\0'; | |
faca07fb RS |
2476 | if (sizeof (int) == sizeof (EMACS_INT)) |
2477 | XSETINT (val, atoi (read_buffer)); | |
2478 | else if (sizeof (long) == sizeof (EMACS_INT)) | |
2479 | XSETINT (val, atol (read_buffer)); | |
2480 | else | |
2481 | abort (); | |
481c6336 RS |
2482 | return val; |
2483 | } | |
2484 | } | |
481c6336 | 2485 | if (isfloat_string (read_buffer)) |
eb659c41 | 2486 | { |
a8972052 PE |
2487 | /* Compute NaN and infinities using 0.0 in a variable, |
2488 | to cope with compilers that think they are smarter | |
5e24a1f7 | 2489 | than we are. */ |
3c329963 | 2490 | double zero = 0.0; |
a8972052 PE |
2491 | |
2492 | double value; | |
2493 | ||
2494 | /* Negate the value ourselves. This treats 0, NaNs, | |
2495 | and infinity properly on IEEE floating point hosts, | |
2496 | and works around a common bug where atof ("-0.0") | |
2497 | drops the sign. */ | |
2498 | int negative = read_buffer[0] == '-'; | |
2499 | ||
2500 | /* The only way p[-1] can be 'F' or 'N', after isfloat_string | |
eb659c41 | 2501 | returns 1, is if the input ends in e+INF or e+NaN. */ |
a8972052 | 2502 | switch (p[-1]) |
eb659c41 | 2503 | { |
a8972052 PE |
2504 | case 'F': |
2505 | value = 1.0 / zero; | |
2506 | break; | |
2507 | case 'N': | |
2508 | value = zero / zero; | |
2509 | break; | |
2510 | default: | |
2511 | value = atof (read_buffer + negative); | |
2512 | break; | |
eb659c41 | 2513 | } |
a8972052 PE |
2514 | |
2515 | return make_float (negative ? - value : value); | |
eb659c41 | 2516 | } |
481c6336 | 2517 | } |
abb13b09 CW |
2518 | { |
2519 | Lisp_Object result = uninterned_symbol ? make_symbol (read_buffer) | |
2520 | : intern (read_buffer); | |
2521 | if (EQ (Vread_with_symbol_positions, Qt) | |
2522 | || EQ (Vread_with_symbol_positions, readcharfun)) | |
2523 | Vread_symbol_positions_list = | |
2524 | /* Kind of a hack; this will probably fail if characters | |
2525 | in the symbol name were escaped. Not really a big | |
2526 | deal, though. */ | |
f74db720 SM |
2527 | Fcons (Fcons (result, |
2528 | make_number (readchar_count | |
2529 | - XFASTINT (Flength (Fsymbol_name (result))))), | |
abb13b09 CW |
2530 | Vread_symbol_positions_list); |
2531 | return result; | |
2532 | } | |
078e7b4a JB |
2533 | } |
2534 | } | |
2535 | } | |
2536 | \f | |
9e062b6c RS |
2537 | |
2538 | /* List of nodes we've seen during substitute_object_in_subtree. */ | |
2539 | static Lisp_Object seen_list; | |
2540 | ||
2541 | static void | |
2542 | substitute_object_in_subtree (object, placeholder) | |
2543 | Lisp_Object object; | |
2544 | Lisp_Object placeholder; | |
2545 | { | |
2546 | Lisp_Object check_object; | |
2547 | ||
2548 | /* We haven't seen any objects when we start. */ | |
2549 | seen_list = Qnil; | |
2550 | ||
2551 | /* Make all the substitutions. */ | |
2552 | check_object | |
2553 | = substitute_object_recurse (object, placeholder, object); | |
2554 | ||
2555 | /* Clear seen_list because we're done with it. */ | |
2556 | seen_list = Qnil; | |
2557 | ||
2558 | /* The returned object here is expected to always eq the | |
2559 | original. */ | |
2560 | if (!EQ (check_object, object)) | |
2561 | error ("Unexpected mutation error in reader"); | |
2562 | } | |
2563 | ||
2564 | /* Feval doesn't get called from here, so no gc protection is needed. */ | |
2565 | #define SUBSTITUTE(get_val, set_val) \ | |
2566 | { \ | |
2567 | Lisp_Object old_value = get_val; \ | |
2568 | Lisp_Object true_value \ | |
2569 | = substitute_object_recurse (object, placeholder,\ | |
2570 | old_value); \ | |
2571 | \ | |
2572 | if (!EQ (old_value, true_value)) \ | |
2573 | { \ | |
2574 | set_val; \ | |
2575 | } \ | |
2576 | } | |
2577 | ||
2578 | static Lisp_Object | |
2579 | substitute_object_recurse (object, placeholder, subtree) | |
2580 | Lisp_Object object; | |
2581 | Lisp_Object placeholder; | |
2582 | Lisp_Object subtree; | |
2583 | { | |
2584 | /* If we find the placeholder, return the target object. */ | |
2585 | if (EQ (placeholder, subtree)) | |
2586 | return object; | |
2587 | ||
2588 | /* If we've been to this node before, don't explore it again. */ | |
2589 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) | |
2590 | return subtree; | |
2591 | ||
2592 | /* If this node can be the entry point to a cycle, remember that | |
2593 | we've seen it. It can only be such an entry point if it was made | |
2594 | by #n=, which means that we can find it as a value in | |
2595 | read_objects. */ | |
2596 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
2597 | seen_list = Fcons (subtree, seen_list); | |
2598 | ||
2599 | /* Recurse according to subtree's type. | |
2600 | Every branch must return a Lisp_Object. */ | |
2601 | switch (XTYPE (subtree)) | |
2602 | { | |
2603 | case Lisp_Vectorlike: | |
2604 | { | |
2605 | int i; | |
7c752c80 | 2606 | int length = XINT (Flength(subtree)); |
9e062b6c RS |
2607 | for (i = 0; i < length; i++) |
2608 | { | |
2609 | Lisp_Object idx = make_number (i); | |
2610 | SUBSTITUTE (Faref (subtree, idx), | |
2611 | Faset (subtree, idx, true_value)); | |
2612 | } | |
2613 | return subtree; | |
2614 | } | |
2615 | ||
2616 | case Lisp_Cons: | |
2617 | { | |
2618 | SUBSTITUTE (Fcar_safe (subtree), | |
e61b9b87 | 2619 | Fsetcar (subtree, true_value)); |
9e062b6c | 2620 | SUBSTITUTE (Fcdr_safe (subtree), |
e61b9b87 | 2621 | Fsetcdr (subtree, true_value)); |
9e062b6c RS |
2622 | return subtree; |
2623 | } | |
2624 | ||
9e062b6c RS |
2625 | case Lisp_String: |
2626 | { | |
2627 | /* Check for text properties in each interval. | |
e61b9b87 | 2628 | substitute_in_interval contains part of the logic. */ |
9e062b6c | 2629 | |
d5db4077 | 2630 | INTERVAL root_interval = STRING_INTERVALS (subtree); |
9e062b6c RS |
2631 | Lisp_Object arg = Fcons (object, placeholder); |
2632 | ||
0d74b006 SM |
2633 | traverse_intervals_noorder (root_interval, |
2634 | &substitute_in_interval, arg); | |
9e062b6c RS |
2635 | |
2636 | return subtree; | |
2637 | } | |
9e062b6c RS |
2638 | |
2639 | /* Other types don't recurse any further. */ | |
2640 | default: | |
2641 | return subtree; | |
2642 | } | |
2643 | } | |
2644 | ||
2645 | /* Helper function for substitute_object_recurse. */ | |
2646 | static void | |
2647 | substitute_in_interval (interval, arg) | |
2648 | INTERVAL interval; | |
2649 | Lisp_Object arg; | |
2650 | { | |
2651 | Lisp_Object object = Fcar (arg); | |
2652 | Lisp_Object placeholder = Fcdr (arg); | |
2653 | ||
2654 | SUBSTITUTE(interval->plist, interval->plist = true_value); | |
2655 | } | |
2656 | ||
2657 | \f | |
078e7b4a JB |
2658 | #define LEAD_INT 1 |
2659 | #define DOT_CHAR 2 | |
2660 | #define TRAIL_INT 4 | |
2661 | #define E_CHAR 8 | |
2662 | #define EXP_INT 16 | |
2663 | ||
2664 | int | |
2665 | isfloat_string (cp) | |
2666 | register char *cp; | |
2667 | { | |
c1a2f60a | 2668 | register int state; |
078e7b4a | 2669 | |
d8578e58 RS |
2670 | char *start = cp; |
2671 | ||
078e7b4a JB |
2672 | state = 0; |
2673 | if (*cp == '+' || *cp == '-') | |
2674 | cp++; | |
2675 | ||
075027b1 | 2676 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2677 | { |
2678 | state |= LEAD_INT; | |
075027b1 RS |
2679 | while (*cp >= '0' && *cp <= '9') |
2680 | cp++; | |
078e7b4a JB |
2681 | } |
2682 | if (*cp == '.') | |
2683 | { | |
2684 | state |= DOT_CHAR; | |
2685 | cp++; | |
2686 | } | |
075027b1 | 2687 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2688 | { |
2689 | state |= TRAIL_INT; | |
075027b1 | 2690 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2691 | cp++; |
2692 | } | |
a35f88bf | 2693 | if (*cp == 'e' || *cp == 'E') |
078e7b4a JB |
2694 | { |
2695 | state |= E_CHAR; | |
2696 | cp++; | |
e73997a1 RS |
2697 | if (*cp == '+' || *cp == '-') |
2698 | cp++; | |
078e7b4a | 2699 | } |
078e7b4a | 2700 | |
075027b1 | 2701 | if (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2702 | { |
2703 | state |= EXP_INT; | |
075027b1 | 2704 | while (*cp >= '0' && *cp <= '9') |
078e7b4a JB |
2705 | cp++; |
2706 | } | |
d8578e58 RS |
2707 | else if (cp == start) |
2708 | ; | |
eb659c41 RS |
2709 | else if (cp[-1] == '+' && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') |
2710 | { | |
2711 | state |= EXP_INT; | |
2712 | cp += 3; | |
2713 | } | |
2714 | else if (cp[-1] == '+' && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
2715 | { | |
2716 | state |= EXP_INT; | |
2717 | cp += 3; | |
2718 | } | |
2719 | ||
37579d7c | 2720 | return (((*cp == 0) || (*cp == ' ') || (*cp == '\t') || (*cp == '\n') || (*cp == '\r') || (*cp == '\f')) |
078e7b4a | 2721 | && (state == (LEAD_INT|DOT_CHAR|TRAIL_INT) |
151bdc83 | 2722 | || state == (DOT_CHAR|TRAIL_INT) |
078e7b4a | 2723 | || state == (LEAD_INT|E_CHAR|EXP_INT) |
151bdc83 JB |
2724 | || state == (LEAD_INT|DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT) |
2725 | || state == (DOT_CHAR|TRAIL_INT|E_CHAR|EXP_INT))); | |
078e7b4a | 2726 | } |
cc94f3b2 | 2727 | |
078e7b4a JB |
2728 | \f |
2729 | static Lisp_Object | |
c15cfd1f | 2730 | read_vector (readcharfun, bytecodeflag) |
078e7b4a | 2731 | Lisp_Object readcharfun; |
c15cfd1f | 2732 | int bytecodeflag; |
078e7b4a JB |
2733 | { |
2734 | register int i; | |
2735 | register int size; | |
2736 | register Lisp_Object *ptr; | |
c15cfd1f | 2737 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
2738 | register struct Lisp_Cons *otem; |
2739 | Lisp_Object len; | |
2740 | ||
2741 | tem = read_list (1, readcharfun); | |
2742 | len = Flength (tem); | |
2743 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
2744 | ||
078e7b4a JB |
2745 | size = XVECTOR (vector)->size; |
2746 | ptr = XVECTOR (vector)->contents; | |
2747 | for (i = 0; i < size; i++) | |
2748 | { | |
c15cfd1f RS |
2749 | item = Fcar (tem); |
2750 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
2751 | bytecode object, the docstring containing the bytecode and | |
2752 | constants values must be treated as unibyte and passed to | |
2753 | Fread, to get the actual bytecode string and constants vector. */ | |
2754 | if (bytecodeflag && load_force_doc_strings) | |
2755 | { | |
2756 | if (i == COMPILED_BYTECODE) | |
2757 | { | |
2758 | if (!STRINGP (item)) | |
2759 | error ("invalid byte code"); | |
2760 | ||
2761 | /* Delay handling the bytecode slot until we know whether | |
2762 | it is lazily-loaded (we can tell by whether the | |
2763 | constants slot is nil). */ | |
2764 | ptr[COMPILED_CONSTANTS] = item; | |
2765 | item = Qnil; | |
2766 | } | |
2767 | else if (i == COMPILED_CONSTANTS) | |
2768 | { | |
2769 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
2770 | ||
2771 | if (NILP (item)) | |
2772 | { | |
2773 | /* Coerce string to unibyte (like string-as-unibyte, | |
2774 | but without generating extra garbage and | |
2775 | guaranteeing no change in the contents). */ | |
bee91904 | 2776 | STRING_SET_CHARS (bytestr, SBYTES (bytestr)); |
d5db4077 | 2777 | STRING_SET_UNIBYTE (bytestr); |
c15cfd1f RS |
2778 | |
2779 | item = Fread (bytestr); | |
2780 | if (!CONSP (item)) | |
2781 | error ("invalid byte code"); | |
2782 | ||
2783 | otem = XCONS (item); | |
c1d497be KR |
2784 | bytestr = XCAR (item); |
2785 | item = XCDR (item); | |
c15cfd1f RS |
2786 | free_cons (otem); |
2787 | } | |
2788 | ||
2789 | /* Now handle the bytecode slot. */ | |
2790 | ptr[COMPILED_BYTECODE] = read_pure ? Fpurecopy (bytestr) : bytestr; | |
2791 | } | |
2792 | } | |
2793 | ptr[i] = read_pure ? Fpurecopy (item) : item; | |
078e7b4a JB |
2794 | otem = XCONS (tem); |
2795 | tem = Fcdr (tem); | |
2796 | free_cons (otem); | |
2797 | } | |
2798 | return vector; | |
2799 | } | |
2800 | ||
6f7f43d5 RS |
2801 | /* FLAG = 1 means check for ] to terminate rather than ) and . |
2802 | FLAG = -1 means check for starting with defun | |
078e7b4a JB |
2803 | and make structure pure. */ |
2804 | ||
2805 | static Lisp_Object | |
2806 | read_list (flag, readcharfun) | |
2807 | int flag; | |
2808 | register Lisp_Object readcharfun; | |
2809 | { | |
2810 | /* -1 means check next element for defun, | |
2811 | 0 means don't check, | |
2812 | 1 means already checked and found defun. */ | |
2813 | int defunflag = flag < 0 ? -1 : 0; | |
2814 | Lisp_Object val, tail; | |
2815 | register Lisp_Object elt, tem; | |
2816 | struct gcpro gcpro1, gcpro2; | |
821d417e | 2817 | /* 0 is the normal case. |
b2a30870 RS |
2818 | 1 means this list is a doc reference; replace it with the number 0. |
2819 | 2 means this list is a doc reference; replace it with the doc string. */ | |
821d417e | 2820 | int doc_reference = 0; |
078e7b4a | 2821 | |
17634846 RS |
2822 | /* Initialize this to 1 if we are reading a list. */ |
2823 | int first_in_list = flag <= 0; | |
2824 | ||
078e7b4a JB |
2825 | val = Qnil; |
2826 | tail = Qnil; | |
2827 | ||
2828 | while (1) | |
2829 | { | |
e28552a4 | 2830 | int ch; |
078e7b4a | 2831 | GCPRO2 (val, tail); |
17634846 | 2832 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 2833 | UNGCPRO; |
20ea2964 | 2834 | |
17634846 RS |
2835 | first_in_list = 0; |
2836 | ||
821d417e | 2837 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 2838 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 2839 | && ! NILP (elt) |
821d417e RS |
2840 | && !NILP (Vpurify_flag)) |
2841 | { | |
2842 | if (NILP (Vdoc_file_name)) | |
2843 | /* We have not yet called Snarf-documentation, so assume | |
2844 | this file is described in the DOC-MM.NN file | |
2845 | and Snarf-documentation will fill in the right value later. | |
2846 | For now, replace the whole list with 0. */ | |
2847 | doc_reference = 1; | |
2848 | else | |
2849 | /* We have already called Snarf-documentation, so make a relative | |
2850 | file name for this file, so it can be found properly | |
2851 | in the installed Lisp directory. | |
2852 | We don't use Fexpand_file_name because that would make | |
2853 | the directory absolute now. */ | |
2854 | elt = concat2 (build_string ("../lisp/"), | |
2855 | Ffile_name_nondirectory (elt)); | |
2856 | } | |
b2a30870 | 2857 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 2858 | && ! NILP (elt) |
b2a30870 RS |
2859 | && load_force_doc_strings) |
2860 | doc_reference = 2; | |
20ea2964 | 2861 | |
6428369f | 2862 | if (ch) |
078e7b4a JB |
2863 | { |
2864 | if (flag > 0) | |
2865 | { | |
6428369f | 2866 | if (ch == ']') |
078e7b4a | 2867 | return val; |
821d417e RS |
2868 | Fsignal (Qinvalid_read_syntax, |
2869 | Fcons (make_string (") or . in a vector", 18), Qnil)); | |
078e7b4a | 2870 | } |
6428369f | 2871 | if (ch == ')') |
078e7b4a | 2872 | return val; |
6428369f | 2873 | if (ch == '.') |
078e7b4a JB |
2874 | { |
2875 | GCPRO2 (val, tail); | |
265a9e55 | 2876 | if (!NILP (tail)) |
f5df591a | 2877 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
2878 | else |
2879 | val = read0 (readcharfun); | |
17634846 | 2880 | read1 (readcharfun, &ch, 0); |
078e7b4a | 2881 | UNGCPRO; |
6428369f | 2882 | if (ch == ')') |
821d417e RS |
2883 | { |
2884 | if (doc_reference == 1) | |
2885 | return make_number (0); | |
b2a30870 RS |
2886 | if (doc_reference == 2) |
2887 | { | |
2888 | /* Get a doc string from the file we are loading. | |
2889 | If it's in saved_doc_string, get it from there. */ | |
c1d497be | 2890 | int pos = XINT (XCDR (val)); |
c15cfd1f RS |
2891 | /* Position is negative for user variables. */ |
2892 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
2893 | if (pos >= saved_doc_string_position |
2894 | && pos < (saved_doc_string_position | |
2895 | + saved_doc_string_length)) | |
2896 | { | |
2897 | int start = pos - saved_doc_string_position; | |
2898 | int from, to; | |
2899 | ||
2900 | /* Process quoting with ^A, | |
2901 | and find the end of the string, | |
2902 | which is marked with ^_ (037). */ | |
2903 | for (from = start, to = start; | |
2904 | saved_doc_string[from] != 037;) | |
2905 | { | |
2906 | int c = saved_doc_string[from++]; | |
2907 | if (c == 1) | |
2908 | { | |
2909 | c = saved_doc_string[from++]; | |
2910 | if (c == 1) | |
2911 | saved_doc_string[to++] = c; | |
2912 | else if (c == '0') | |
2913 | saved_doc_string[to++] = 0; | |
2914 | else if (c == '_') | |
2915 | saved_doc_string[to++] = 037; | |
2916 | } | |
2917 | else | |
2918 | saved_doc_string[to++] = c; | |
2919 | } | |
2920 | ||
2921 | return make_string (saved_doc_string + start, | |
2922 | to - start); | |
2923 | } | |
c15cfd1f RS |
2924 | /* Look in prev_saved_doc_string the same way. */ |
2925 | else if (pos >= prev_saved_doc_string_position | |
2926 | && pos < (prev_saved_doc_string_position | |
2927 | + prev_saved_doc_string_length)) | |
2928 | { | |
2929 | int start = pos - prev_saved_doc_string_position; | |
2930 | int from, to; | |
2931 | ||
2932 | /* Process quoting with ^A, | |
2933 | and find the end of the string, | |
2934 | which is marked with ^_ (037). */ | |
2935 | for (from = start, to = start; | |
2936 | prev_saved_doc_string[from] != 037;) | |
2937 | { | |
2938 | int c = prev_saved_doc_string[from++]; | |
2939 | if (c == 1) | |
2940 | { | |
2941 | c = prev_saved_doc_string[from++]; | |
2942 | if (c == 1) | |
2943 | prev_saved_doc_string[to++] = c; | |
2944 | else if (c == '0') | |
2945 | prev_saved_doc_string[to++] = 0; | |
2946 | else if (c == '_') | |
2947 | prev_saved_doc_string[to++] = 037; | |
2948 | } | |
2949 | else | |
2950 | prev_saved_doc_string[to++] = c; | |
2951 | } | |
2952 | ||
2953 | return make_string (prev_saved_doc_string + start, | |
2954 | to - start); | |
2955 | } | |
b2a30870 | 2956 | else |
6fe9cce5 | 2957 | return get_doc_string (val, 0, 0); |
b2a30870 RS |
2958 | } |
2959 | ||
821d417e RS |
2960 | return val; |
2961 | } | |
078e7b4a JB |
2962 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string (". in wrong context", 18), Qnil)); |
2963 | } | |
2964 | return Fsignal (Qinvalid_read_syntax, Fcons (make_string ("] in a list", 11), Qnil)); | |
2965 | } | |
2966 | tem = (read_pure && flag <= 0 | |
2967 | ? pure_cons (elt, Qnil) | |
2968 | : Fcons (elt, Qnil)); | |
265a9e55 | 2969 | if (!NILP (tail)) |
f5df591a | 2970 | XSETCDR (tail, tem); |
078e7b4a JB |
2971 | else |
2972 | val = tem; | |
2973 | tail = tem; | |
2974 | if (defunflag < 0) | |
2975 | defunflag = EQ (elt, Qdefun); | |
2976 | else if (defunflag > 0) | |
2977 | read_pure = 1; | |
2978 | } | |
2979 | } | |
2980 | \f | |
2981 | Lisp_Object Vobarray; | |
2982 | Lisp_Object initial_obarray; | |
2983 | ||
d007f5c8 RS |
2984 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
2985 | ||
2986 | int oblookup_last_bucket_number; | |
2987 | ||
2988 | static int hash_string (); | |
d007f5c8 RS |
2989 | |
2990 | /* Get an error if OBARRAY is not an obarray. | |
2991 | If it is one, return it. */ | |
2992 | ||
078e7b4a JB |
2993 | Lisp_Object |
2994 | check_obarray (obarray) | |
2995 | Lisp_Object obarray; | |
2996 | { | |
cfff016d | 2997 | while (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a JB |
2998 | { |
2999 | /* If Vobarray is now invalid, force it to be valid. */ | |
3000 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
3001 | ||
3002 | obarray = wrong_type_argument (Qvectorp, obarray); | |
3003 | } | |
3004 | return obarray; | |
3005 | } | |
3006 | ||
d007f5c8 RS |
3007 | /* Intern the C string STR: return a symbol with that name, |
3008 | interned in the current obarray. */ | |
078e7b4a JB |
3009 | |
3010 | Lisp_Object | |
3011 | intern (str) | |
4b2dd274 | 3012 | const char *str; |
078e7b4a JB |
3013 | { |
3014 | Lisp_Object tem; | |
3015 | int len = strlen (str); | |
153a17b7 | 3016 | Lisp_Object obarray; |
078e7b4a | 3017 | |
153a17b7 | 3018 | obarray = Vobarray; |
cfff016d | 3019 | if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0) |
078e7b4a | 3020 | obarray = check_obarray (obarray); |
e28552a4 | 3021 | tem = oblookup (obarray, str, len, len); |
cfff016d | 3022 | if (SYMBOLP (tem)) |
078e7b4a | 3023 | return tem; |
87631ef7 | 3024 | return Fintern (make_string (str, len), obarray); |
078e7b4a | 3025 | } |
4ad679f9 EN |
3026 | |
3027 | /* Create an uninterned symbol with name STR. */ | |
3028 | ||
3029 | Lisp_Object | |
3030 | make_symbol (str) | |
3031 | char *str; | |
3032 | { | |
3033 | int len = strlen (str); | |
3034 | ||
3035 | return Fmake_symbol ((!NILP (Vpurify_flag) | |
491f16a2 | 3036 | ? make_pure_string (str, len, len, 0) |
4ad679f9 EN |
3037 | : make_string (str, len))); |
3038 | } | |
d007f5c8 | 3039 | \f |
078e7b4a | 3040 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
3041 | doc: /* Return the canonical symbol whose name is STRING. |
3042 | If there is none, one is created by this function and returned. | |
3043 | A second optional argument specifies the obarray to use; | |
3044 | it defaults to the value of `obarray'. */) | |
3045 | (string, obarray) | |
9391b698 | 3046 | Lisp_Object string, obarray; |
078e7b4a JB |
3047 | { |
3048 | register Lisp_Object tem, sym, *ptr; | |
3049 | ||
265a9e55 | 3050 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3051 | obarray = check_obarray (obarray); |
3052 | ||
b7826503 | 3053 | CHECK_STRING (string); |
078e7b4a | 3054 | |
d5db4077 KR |
3055 | tem = oblookup (obarray, SDATA (string), |
3056 | SCHARS (string), | |
3057 | SBYTES (string)); | |
cfff016d | 3058 | if (!INTEGERP (tem)) |
078e7b4a JB |
3059 | return tem; |
3060 | ||
265a9e55 | 3061 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
3062 | string = Fpurecopy (string); |
3063 | sym = Fmake_symbol (string); | |
44c6c019 GM |
3064 | |
3065 | if (EQ (obarray, initial_obarray)) | |
3066 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
3067 | else | |
3068 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 3069 | |
d5db4077 | 3070 | if ((SREF (string, 0) == ':') |
a458d45d | 3071 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
3072 | { |
3073 | XSYMBOL (sym)->constant = 1; | |
3074 | XSYMBOL (sym)->value = sym; | |
3075 | } | |
a0549832 | 3076 | |
078e7b4a | 3077 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
cfff016d | 3078 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
3079 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
3080 | else | |
3081 | XSYMBOL (sym)->next = 0; | |
3082 | *ptr = sym; | |
3083 | return sym; | |
3084 | } | |
3085 | ||
3086 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, | |
5de38842 PJ |
3087 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3088 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3089 | symbol is searched for. | |
3090 | A second optional argument specifies the obarray to use; | |
3091 | it defaults to the value of `obarray'. */) | |
3092 | (name, obarray) | |
b55048d4 | 3093 | Lisp_Object name, obarray; |
078e7b4a | 3094 | { |
c2d47f4b | 3095 | register Lisp_Object tem, string; |
078e7b4a | 3096 | |
265a9e55 | 3097 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3098 | obarray = check_obarray (obarray); |
3099 | ||
b55048d4 GM |
3100 | if (!SYMBOLP (name)) |
3101 | { | |
b7826503 | 3102 | CHECK_STRING (name); |
c2d47f4b | 3103 | string = name; |
b55048d4 GM |
3104 | } |
3105 | else | |
c2d47f4b | 3106 | string = SYMBOL_NAME (name); |
078e7b4a | 3107 | |
c2d47f4b | 3108 | tem = oblookup (obarray, SDATA (string), SCHARS (string), SBYTES (string)); |
b55048d4 GM |
3109 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
3110 | return Qnil; | |
3111 | else | |
078e7b4a | 3112 | return tem; |
078e7b4a | 3113 | } |
d007f5c8 RS |
3114 | \f |
3115 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, | |
5de38842 PJ |
3116 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3117 | The value is t if a symbol was found and deleted, nil otherwise. | |
3118 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3119 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3120 | OBARRAY defaults to the value of the variable `obarray'. */) | |
3121 | (name, obarray) | |
d007f5c8 RS |
3122 | Lisp_Object name, obarray; |
3123 | { | |
3124 | register Lisp_Object string, tem; | |
3125 | int hash; | |
3126 | ||
3127 | if (NILP (obarray)) obarray = Vobarray; | |
3128 | obarray = check_obarray (obarray); | |
3129 | ||
3130 | if (SYMBOLP (name)) | |
d4c83cae | 3131 | string = SYMBOL_NAME (name); |
d007f5c8 RS |
3132 | else |
3133 | { | |
b7826503 | 3134 | CHECK_STRING (name); |
d007f5c8 RS |
3135 | string = name; |
3136 | } | |
3137 | ||
d5db4077 KR |
3138 | tem = oblookup (obarray, SDATA (string), |
3139 | SCHARS (string), | |
3140 | SBYTES (string)); | |
d007f5c8 RS |
3141 | if (INTEGERP (tem)) |
3142 | return Qnil; | |
3143 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3144 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3145 | return Qnil; | |
3146 | ||
44c6c019 GM |
3147 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
3148 | XSYMBOL (tem)->constant = 0; | |
3149 | XSYMBOL (tem)->indirect_variable = 0; | |
ca69c42f | 3150 | |
d007f5c8 RS |
3151 | hash = oblookup_last_bucket_number; |
3152 | ||
3153 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
3154 | { |
3155 | if (XSYMBOL (tem)->next) | |
3156 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
3157 | else | |
3158 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
3159 | } | |
d007f5c8 RS |
3160 | else |
3161 | { | |
3162 | Lisp_Object tail, following; | |
3163 | ||
3164 | for (tail = XVECTOR (obarray)->contents[hash]; | |
3165 | XSYMBOL (tail)->next; | |
3166 | tail = following) | |
3167 | { | |
3168 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3169 | if (EQ (following, tem)) | |
3170 | { | |
3171 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
3172 | break; | |
3173 | } | |
3174 | } | |
3175 | } | |
3176 | ||
3177 | return Qt; | |
3178 | } | |
3179 | \f | |
3180 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3181 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3182 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3183 | |
3184 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3185 | |
3186 | Lisp_Object | |
e28552a4 | 3187 | oblookup (obarray, ptr, size, size_byte) |
078e7b4a | 3188 | Lisp_Object obarray; |
4b2dd274 | 3189 | register const char *ptr; |
e28552a4 | 3190 | int size, size_byte; |
078e7b4a | 3191 | { |
7a70b397 RS |
3192 | int hash; |
3193 | int obsize; | |
078e7b4a JB |
3194 | register Lisp_Object tail; |
3195 | Lisp_Object bucket, tem; | |
3196 | ||
cfff016d | 3197 | if (!VECTORP (obarray) |
7c79a684 | 3198 | || (obsize = XVECTOR (obarray)->size) == 0) |
078e7b4a JB |
3199 | { |
3200 | obarray = check_obarray (obarray); | |
3201 | obsize = XVECTOR (obarray)->size; | |
3202 | } | |
519418b3 RS |
3203 | /* This is sometimes needed in the middle of GC. */ |
3204 | obsize &= ~ARRAY_MARK_FLAG; | |
078e7b4a | 3205 | /* Combining next two lines breaks VMS C 2.3. */ |
e28552a4 | 3206 | hash = hash_string (ptr, size_byte); |
078e7b4a JB |
3207 | hash %= obsize; |
3208 | bucket = XVECTOR (obarray)->contents[hash]; | |
d007f5c8 | 3209 | oblookup_last_bucket_number = hash; |
078e7b4a JB |
3210 | if (XFASTINT (bucket) == 0) |
3211 | ; | |
cfff016d | 3212 | else if (!SYMBOLP (bucket)) |
078e7b4a | 3213 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
3214 | else |
3215 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3216 | { |
d5db4077 KR |
3217 | if (SBYTES (SYMBOL_NAME (tail)) == size_byte |
3218 | && SCHARS (SYMBOL_NAME (tail)) == size | |
3219 | && !bcmp (SDATA (SYMBOL_NAME (tail)), ptr, size_byte)) | |
078e7b4a JB |
3220 | return tail; |
3221 | else if (XSYMBOL (tail)->next == 0) | |
3222 | break; | |
3223 | } | |
1805de4f | 3224 | XSETINT (tem, hash); |
078e7b4a JB |
3225 | return tem; |
3226 | } | |
3227 | ||
3228 | static int | |
3229 | hash_string (ptr, len) | |
4b2dd274 | 3230 | const unsigned char *ptr; |
078e7b4a JB |
3231 | int len; |
3232 | { | |
4b2dd274 KR |
3233 | register const unsigned char *p = ptr; |
3234 | register const unsigned char *end = p + len; | |
078e7b4a JB |
3235 | register unsigned char c; |
3236 | register int hash = 0; | |
3237 | ||
3238 | while (p != end) | |
3239 | { | |
3240 | c = *p++; | |
3241 | if (c >= 0140) c -= 40; | |
3242 | hash = ((hash<<3) + (hash>>28) + c); | |
3243 | } | |
3244 | return hash & 07777777777; | |
3245 | } | |
d007f5c8 | 3246 | \f |
078e7b4a JB |
3247 | void |
3248 | map_obarray (obarray, fn, arg) | |
3249 | Lisp_Object obarray; | |
d5b28a9d | 3250 | void (*fn) P_ ((Lisp_Object, Lisp_Object)); |
078e7b4a JB |
3251 | Lisp_Object arg; |
3252 | { | |
3253 | register int i; | |
3254 | register Lisp_Object tail; | |
b7826503 | 3255 | CHECK_VECTOR (obarray); |
078e7b4a JB |
3256 | for (i = XVECTOR (obarray)->size - 1; i >= 0; i--) |
3257 | { | |
3258 | tail = XVECTOR (obarray)->contents[i]; | |
4f5c4403 | 3259 | if (SYMBOLP (tail)) |
078e7b4a JB |
3260 | while (1) |
3261 | { | |
3262 | (*fn) (tail, arg); | |
3263 | if (XSYMBOL (tail)->next == 0) | |
3264 | break; | |
1805de4f | 3265 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3266 | } |
3267 | } | |
3268 | } | |
3269 | ||
d5b28a9d | 3270 | void |
078e7b4a JB |
3271 | mapatoms_1 (sym, function) |
3272 | Lisp_Object sym, function; | |
3273 | { | |
3274 | call1 (function, sym); | |
3275 | } | |
3276 | ||
3277 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3278 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3279 | OBARRAY defaults to the value of `obarray'. */) | |
3280 | (function, obarray) | |
078e7b4a JB |
3281 | Lisp_Object function, obarray; |
3282 | { | |
265a9e55 | 3283 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3284 | obarray = check_obarray (obarray); |
3285 | ||
3286 | map_obarray (obarray, mapatoms_1, function); | |
3287 | return Qnil; | |
3288 | } | |
3289 | ||
5e88a39e | 3290 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3291 | |
3292 | void | |
3293 | init_obarray () | |
3294 | { | |
3295 | Lisp_Object oblength; | |
3296 | int hash; | |
3297 | Lisp_Object *tem; | |
3298 | ||
baf69866 | 3299 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3300 | |
491f16a2 | 3301 | Qnil = Fmake_symbol (make_pure_string ("nil", 3, 3, 0)); |
078e7b4a JB |
3302 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3303 | initial_obarray = Vobarray; | |
3304 | staticpro (&initial_obarray); | |
3305 | /* Intern nil in the obarray */ | |
44c6c019 GM |
3306 | XSYMBOL (Qnil)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; |
3307 | XSYMBOL (Qnil)->constant = 1; | |
3308 | ||
078e7b4a JB |
3309 | /* These locals are to kludge around a pyramid compiler bug. */ |
3310 | hash = hash_string ("nil", 3); | |
3311 | /* Separate statement here to avoid VAXC bug. */ | |
3312 | hash %= OBARRAY_SIZE; | |
3313 | tem = &XVECTOR (Vobarray)->contents[hash]; | |
3314 | *tem = Qnil; | |
3315 | ||
491f16a2 | 3316 | Qunbound = Fmake_symbol (make_pure_string ("unbound", 7, 7, 0)); |
078e7b4a JB |
3317 | XSYMBOL (Qnil)->function = Qunbound; |
3318 | XSYMBOL (Qunbound)->value = Qunbound; | |
3319 | XSYMBOL (Qunbound)->function = Qunbound; | |
3320 | ||
3321 | Qt = intern ("t"); | |
3322 | XSYMBOL (Qnil)->value = Qnil; | |
3323 | XSYMBOL (Qnil)->plist = Qnil; | |
3324 | XSYMBOL (Qt)->value = Qt; | |
44c6c019 | 3325 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
3326 | |
3327 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
3328 | Vpurify_flag = Qt; | |
3329 | ||
3330 | Qvariable_documentation = intern ("variable-documentation"); | |
0f73bb1c | 3331 | staticpro (&Qvariable_documentation); |
078e7b4a | 3332 | |
449fea39 | 3333 | read_buffer_size = 100 + MAX_MULTIBYTE_LENGTH; |
3cb65b0e | 3334 | read_buffer = (char *) xmalloc (read_buffer_size); |
078e7b4a JB |
3335 | } |
3336 | \f | |
3337 | void | |
3338 | defsubr (sname) | |
3339 | struct Lisp_Subr *sname; | |
3340 | { | |
3341 | Lisp_Object sym; | |
3342 | sym = intern (sname->symbol_name); | |
1805de4f | 3343 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3344 | } |
3345 | ||
3346 | #ifdef NOTDEF /* use fset in subr.el now */ | |
3347 | void | |
3348 | defalias (sname, string) | |
3349 | struct Lisp_Subr *sname; | |
3350 | char *string; | |
3351 | { | |
3352 | Lisp_Object sym; | |
3353 | sym = intern (string); | |
1805de4f | 3354 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3355 | } |
3356 | #endif /* NOTDEF */ | |
3357 | ||
078e7b4a | 3358 | /* Define an "integer variable"; a symbol whose value is forwarded |
1a0f90f7 | 3359 | to a C variable of type int. Sample call: */ |
5de38842 | 3360 | /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */ |
078e7b4a | 3361 | void |
e9e00ff2 | 3362 | defvar_int (namestring, address) |
078e7b4a | 3363 | char *namestring; |
31ade731 | 3364 | EMACS_INT *address; |
078e7b4a | 3365 | { |
1a0f90f7 | 3366 | Lisp_Object sym, val; |
078e7b4a | 3367 | sym = intern (namestring); |
1a0f90f7 | 3368 | val = allocate_misc (); |
47e28b2c | 3369 | XMISCTYPE (val) = Lisp_Misc_Intfwd; |
fc1e7df5 | 3370 | XINTFWD (val)->intvar = address; |
44c6c019 | 3371 | SET_SYMBOL_VALUE (sym, val); |
078e7b4a JB |
3372 | } |
3373 | ||
f0529b5b PJ |
3374 | /* Similar but define a variable whose value is t if address contains 1, |
3375 | nil if address contains 0 */ | |
078e7b4a | 3376 | void |
e9e00ff2 | 3377 | defvar_bool (namestring, address) |
078e7b4a JB |
3378 | char *namestring; |
3379 | int *address; | |
078e7b4a | 3380 | { |
1a0f90f7 | 3381 | Lisp_Object sym, val; |
078e7b4a | 3382 | sym = intern (namestring); |
1a0f90f7 | 3383 | val = allocate_misc (); |
47e28b2c | 3384 | XMISCTYPE (val) = Lisp_Misc_Boolfwd; |
fc1e7df5 | 3385 | XBOOLFWD (val)->boolvar = address; |
44c6c019 | 3386 | SET_SYMBOL_VALUE (sym, val); |
1ffcc3b1 | 3387 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
3388 | } |
3389 | ||
1a0f90f7 KH |
3390 | /* Similar but define a variable whose value is the Lisp Object stored |
3391 | at address. Two versions: with and without gc-marking of the C | |
3392 | variable. The nopro version is used when that variable will be | |
3393 | gc-marked for some other reason, since marking the same slot twice | |
3394 | can cause trouble with strings. */ | |
078e7b4a | 3395 | void |
1a0f90f7 | 3396 | defvar_lisp_nopro (namestring, address) |
078e7b4a JB |
3397 | char *namestring; |
3398 | Lisp_Object *address; | |
078e7b4a | 3399 | { |
1a0f90f7 | 3400 | Lisp_Object sym, val; |
078e7b4a | 3401 | sym = intern (namestring); |
1a0f90f7 | 3402 | val = allocate_misc (); |
47e28b2c | 3403 | XMISCTYPE (val) = Lisp_Misc_Objfwd; |
fc1e7df5 | 3404 | XOBJFWD (val)->objvar = address; |
44c6c019 | 3405 | SET_SYMBOL_VALUE (sym, val); |
078e7b4a JB |
3406 | } |
3407 | ||
078e7b4a | 3408 | void |
1a0f90f7 | 3409 | defvar_lisp (namestring, address) |
078e7b4a JB |
3410 | char *namestring; |
3411 | Lisp_Object *address; | |
078e7b4a | 3412 | { |
1a0f90f7 KH |
3413 | defvar_lisp_nopro (namestring, address); |
3414 | staticpro (address); | |
078e7b4a JB |
3415 | } |
3416 | ||
078e7b4a | 3417 | /* Similar but define a variable whose value is the Lisp Object stored in |
2836d9a4 KH |
3418 | the current buffer. address is the address of the slot in the buffer |
3419 | that is current now. */ | |
078e7b4a JB |
3420 | |
3421 | void | |
4360b0c6 | 3422 | defvar_per_buffer (namestring, address, type, doc) |
078e7b4a JB |
3423 | char *namestring; |
3424 | Lisp_Object *address; | |
4360b0c6 | 3425 | Lisp_Object type; |
078e7b4a JB |
3426 | char *doc; |
3427 | { | |
1a0f90f7 | 3428 | Lisp_Object sym, val; |
078e7b4a JB |
3429 | int offset; |
3430 | extern struct buffer buffer_local_symbols; | |
3431 | ||
3432 | sym = intern (namestring); | |
1a0f90f7 | 3433 | val = allocate_misc (); |
078e7b4a JB |
3434 | offset = (char *)address - (char *)current_buffer; |
3435 | ||
47e28b2c | 3436 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; |
fc1e7df5 | 3437 | XBUFFER_OBJFWD (val)->offset = offset; |
44c6c019 | 3438 | SET_SYMBOL_VALUE (sym, val); |
11fd416e GM |
3439 | PER_BUFFER_SYMBOL (offset) = sym; |
3440 | PER_BUFFER_TYPE (offset) = type; | |
cf611f01 | 3441 | |
11fd416e | 3442 | if (PER_BUFFER_IDX (offset) == 0) |
078e7b4a JB |
3443 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding |
3444 | slot of buffer_local_flags */ | |
3445 | abort (); | |
3446 | } | |
3447 | ||
950c215d KH |
3448 | |
3449 | /* Similar but define a variable whose value is the Lisp Object stored | |
4ac38690 | 3450 | at a particular offset in the current kboard object. */ |
950c215d KH |
3451 | |
3452 | void | |
4ac38690 | 3453 | defvar_kboard (namestring, offset) |
950c215d KH |
3454 | char *namestring; |
3455 | int offset; | |
3456 | { | |
3457 | Lisp_Object sym, val; | |
3458 | sym = intern (namestring); | |
3459 | val = allocate_misc (); | |
47e28b2c | 3460 | XMISCTYPE (val) = Lisp_Misc_Kboard_Objfwd; |
4ac38690 | 3461 | XKBOARD_OBJFWD (val)->offset = offset; |
44c6c019 | 3462 | SET_SYMBOL_VALUE (sym, val); |
950c215d | 3463 | } |
078e7b4a | 3464 | \f |
11938f10 KH |
3465 | /* Record the value of load-path used at the start of dumping |
3466 | so we can see if the site changed it later during dumping. */ | |
3467 | static Lisp_Object dump_path; | |
3468 | ||
d5b28a9d | 3469 | void |
279499f0 | 3470 | init_lread () |
078e7b4a | 3471 | { |
46947372 | 3472 | char *normal; |
e73997a1 | 3473 | int turn_off_warning = 0; |
078e7b4a | 3474 | |
279499f0 | 3475 | /* Compute the default load-path. */ |
46947372 JB |
3476 | #ifdef CANNOT_DUMP |
3477 | normal = PATH_LOADSEARCH; | |
e065a56e | 3478 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
3479 | #else |
3480 | if (NILP (Vpurify_flag)) | |
3481 | normal = PATH_LOADSEARCH; | |
279499f0 | 3482 | else |
46947372 | 3483 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 3484 | |
46947372 JB |
3485 | /* In a dumped Emacs, we normally have to reset the value of |
3486 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
3487 | uses ../lisp, instead of the path of the installed elisp | |
3488 | libraries. However, if it appears that Vload_path was changed | |
3489 | from the default before dumping, don't override that value. */ | |
4746118a JB |
3490 | if (initialized) |
3491 | { | |
4746118a | 3492 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
3493 | { |
3494 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 3495 | if (!NILP (Vinstallation_directory)) |
80667d53 | 3496 | { |
3ddff138 RS |
3497 | Lisp_Object tem, tem1, sitelisp; |
3498 | ||
3499 | /* Remove site-lisp dirs from path temporarily and store | |
3500 | them in sitelisp, then conc them on at the end so | |
3501 | they're always first in path. */ | |
3502 | sitelisp = Qnil; | |
3503 | while (1) | |
3504 | { | |
3505 | tem = Fcar (Vload_path); | |
3506 | tem1 = Fstring_match (build_string ("site-lisp"), | |
3507 | tem, Qnil); | |
3508 | if (!NILP (tem1)) | |
3509 | { | |
3510 | Vload_path = Fcdr (Vload_path); | |
3511 | sitelisp = Fcons (tem, sitelisp); | |
3512 | } | |
3513 | else | |
3514 | break; | |
3515 | } | |
3516 | ||
74180aa4 | 3517 | /* Add to the path the lisp subdir of the |
3a3056e5 | 3518 | installation dir, if it exists. */ |
74180aa4 RS |
3519 | tem = Fexpand_file_name (build_string ("lisp"), |
3520 | Vinstallation_directory); | |
3a3056e5 RS |
3521 | tem1 = Ffile_exists_p (tem); |
3522 | if (!NILP (tem1)) | |
3523 | { | |
3524 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
3525 | { |
3526 | turn_off_warning = 1; | |
3ddff138 | 3527 | Vload_path = Fcons (tem, Vload_path); |
e73997a1 | 3528 | } |
3a3056e5 RS |
3529 | } |
3530 | else | |
3531 | /* That dir doesn't exist, so add the build-time | |
3532 | Lisp dirs instead. */ | |
3533 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c | 3534 | |
9fbc0116 RS |
3535 | /* Add leim under the installation dir, if it exists. */ |
3536 | tem = Fexpand_file_name (build_string ("leim"), | |
3537 | Vinstallation_directory); | |
3538 | tem1 = Ffile_exists_p (tem); | |
3539 | if (!NILP (tem1)) | |
3540 | { | |
3541 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3542 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 RS |
3543 | } |
3544 | ||
c478f98c RS |
3545 | /* Add site-list under the installation dir, if it exists. */ |
3546 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
3547 | Vinstallation_directory); | |
3548 | tem1 = Ffile_exists_p (tem); | |
3549 | if (!NILP (tem1)) | |
3550 | { | |
3551 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3552 | Vload_path = Fcons (tem, Vload_path); |
c478f98c | 3553 | } |
0f337465 RS |
3554 | |
3555 | /* If Emacs was not built in the source directory, | |
9fbc0116 RS |
3556 | and it is run from where it was built, add to load-path |
3557 | the lisp, leim and site-lisp dirs under that directory. */ | |
0f337465 RS |
3558 | |
3559 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) | |
3560 | { | |
33046fc9 RS |
3561 | Lisp_Object tem2; |
3562 | ||
0f337465 RS |
3563 | tem = Fexpand_file_name (build_string ("src/Makefile"), |
3564 | Vinstallation_directory); | |
3565 | tem1 = Ffile_exists_p (tem); | |
33046fc9 RS |
3566 | |
3567 | /* Don't be fooled if they moved the entire source tree | |
3568 | AFTER dumping Emacs. If the build directory is indeed | |
3569 | different from the source dir, src/Makefile.in and | |
3570 | src/Makefile will not be found together. */ | |
3571 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
3572 | Vinstallation_directory); | |
3573 | tem2 = Ffile_exists_p (tem); | |
3574 | if (!NILP (tem1) && NILP (tem2)) | |
0f337465 RS |
3575 | { |
3576 | tem = Fexpand_file_name (build_string ("lisp"), | |
3577 | Vsource_directory); | |
3578 | ||
3579 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3580 | Vload_path = Fcons (tem, Vload_path); |
0f337465 | 3581 | |
9fbc0116 RS |
3582 | tem = Fexpand_file_name (build_string ("leim"), |
3583 | Vsource_directory); | |
3584 | ||
3585 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3586 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 | 3587 | |
0f337465 RS |
3588 | tem = Fexpand_file_name (build_string ("site-lisp"), |
3589 | Vsource_directory); | |
3590 | ||
3591 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 3592 | Vload_path = Fcons (tem, Vload_path); |
0f337465 RS |
3593 | } |
3594 | } | |
3ddff138 RS |
3595 | if (!NILP (sitelisp)) |
3596 | Vload_path = nconc2 (Fnreverse (sitelisp), Vload_path); | |
80667d53 RS |
3597 | } |
3598 | } | |
4746118a JB |
3599 | } |
3600 | else | |
11938f10 | 3601 | { |
7b396c6c RS |
3602 | /* NORMAL refers to the lisp dir in the source directory. */ |
3603 | /* We used to add ../lisp at the front here, but | |
3604 | that caused trouble because it was copied from dump_path | |
3605 | into Vload_path, aboe, when Vinstallation_directory was non-nil. | |
3606 | It should be unnecessary. */ | |
3607 | Vload_path = decode_env_path (0, normal); | |
11938f10 KH |
3608 | dump_path = Vload_path; |
3609 | } | |
46947372 | 3610 | #endif |
279499f0 | 3611 | |
317073d5 RS |
3612 | #ifndef WINDOWSNT |
3613 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is | |
3614 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 3615 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
317073d5 RS |
3616 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
3617 | ||
078e7b4a | 3618 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
3619 | if (!turn_off_warning) |
3620 | { | |
3621 | Lisp_Object path_tail; | |
078e7b4a | 3622 | |
e73997a1 RS |
3623 | for (path_tail = Vload_path; |
3624 | !NILP (path_tail); | |
c1d497be | 3625 | path_tail = XCDR (path_tail)) |
e73997a1 RS |
3626 | { |
3627 | Lisp_Object dirfile; | |
3628 | dirfile = Fcar (path_tail); | |
3629 | if (STRINGP (dirfile)) | |
3630 | { | |
3631 | dirfile = Fdirectory_file_name (dirfile); | |
d5db4077 | 3632 | if (access (SDATA (dirfile), 0) < 0) |
85496b8c | 3633 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", |
c1d497be | 3634 | XCAR (path_tail)); |
e73997a1 RS |
3635 | } |
3636 | } | |
3637 | } | |
317073d5 | 3638 | #endif /* WINDOWSNT */ |
46947372 JB |
3639 | |
3640 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
3641 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 3642 | #ifndef CANNOT_DUMP |
46947372 JB |
3643 | if (NILP (Vpurify_flag) |
3644 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 3645 | #endif |
279499f0 | 3646 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
3647 | |
3648 | Vvalues = Qnil; | |
3649 | ||
078e7b4a | 3650 | load_in_progress = 0; |
4e53f562 | 3651 | Vload_file_name = Qnil; |
d2c6be7f RS |
3652 | |
3653 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
3654 | |
3655 | Vstandard_input = Qt; | |
f74b0705 | 3656 | Vloads_in_progress = Qnil; |
078e7b4a JB |
3657 | } |
3658 | ||
85496b8c RS |
3659 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
3660 | does not exist. Print it on stderr and put it in *Message*. */ | |
3661 | ||
d5b28a9d | 3662 | void |
85496b8c RS |
3663 | dir_warning (format, dirname) |
3664 | char *format; | |
3665 | Lisp_Object dirname; | |
3666 | { | |
3667 | char *buffer | |
d5db4077 | 3668 | = (char *) alloca (SCHARS (dirname) + strlen (format) + 5); |
85496b8c | 3669 | |
d5db4077 KR |
3670 | fprintf (stderr, format, SDATA (dirname)); |
3671 | sprintf (buffer, format, SDATA (dirname)); | |
9b69357e GV |
3672 | /* Don't log the warning before we've initialized!! */ |
3673 | if (initialized) | |
3674 | message_dolog (buffer, strlen (buffer), 0, STRING_MULTIBYTE (dirname)); | |
85496b8c RS |
3675 | } |
3676 | ||
078e7b4a | 3677 | void |
279499f0 | 3678 | syms_of_lread () |
078e7b4a JB |
3679 | { |
3680 | defsubr (&Sread); | |
3681 | defsubr (&Sread_from_string); | |
3682 | defsubr (&Sintern); | |
3683 | defsubr (&Sintern_soft); | |
d007f5c8 | 3684 | defsubr (&Sunintern); |
078e7b4a | 3685 | defsubr (&Sload); |
228d4b1c | 3686 | defsubr (&Seval_buffer); |
078e7b4a JB |
3687 | defsubr (&Seval_region); |
3688 | defsubr (&Sread_char); | |
3689 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 3690 | defsubr (&Sread_event); |
078e7b4a JB |
3691 | defsubr (&Sget_file_char); |
3692 | defsubr (&Smapatoms); | |
86d00812 | 3693 | defsubr (&Slocate_file_internal); |
078e7b4a JB |
3694 | |
3695 | DEFVAR_LISP ("obarray", &Vobarray, | |
5de38842 PJ |
3696 | doc: /* Symbol table for use by `intern' and `read'. |
3697 | It is a vector whose length ought to be prime for best results. | |
3698 | The vector's contents don't make sense if examined from Lisp programs; | |
3699 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a JB |
3700 | |
3701 | DEFVAR_LISP ("values", &Vvalues, | |
5de38842 PJ |
3702 | doc: /* List of values of all expressions which were read, evaluated and printed. |
3703 | Order is reverse chronological. */); | |
078e7b4a JB |
3704 | |
3705 | DEFVAR_LISP ("standard-input", &Vstandard_input, | |
5de38842 PJ |
3706 | doc: /* Stream for read to get input from. |
3707 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
3708 | Vstandard_input = Qt; |
3709 | ||
abb13b09 CW |
3710 | DEFVAR_LISP ("read-with-symbol-positions", &Vread_with_symbol_positions, |
3711 | doc: /* If non-nil, add position of read symbols to `read-symbol-positions-list'. | |
3712 | ||
3713 | If this variable is a buffer, then only forms read from that buffer | |
3714 | will be added to `read-symbol-positions-list'. | |
3715 | If this variable is t, then all read forms will be added. | |
3716 | The effect of all other values other than nil are not currently | |
3717 | defined, although they may be in the future. | |
3718 | ||
3719 | The positions are relative to the last call to `read' or | |
3720 | `read-from-string'. It is probably a bad idea to set this variable at | |
3721 | the toplevel; bind it instead. */); | |
3722 | Vread_with_symbol_positions = Qnil; | |
3723 | ||
3724 | DEFVAR_LISP ("read-symbol-positions-list", &Vread_symbol_positions_list, | |
d6567030 | 3725 | doc: /* A list mapping read symbols to their positions. |
abb13b09 CW |
3726 | This variable is modified during calls to `read' or |
3727 | `read-from-string', but only when `read-with-symbol-positions' is | |
3728 | non-nil. | |
3729 | ||
3730 | Each element of the list looks like (SYMBOL . CHAR-POSITION), where | |
d6567030 | 3731 | CHAR-POSITION is an integer giving the offset of that occurrence of the |
abb13b09 CW |
3732 | symbol from the position where `read' or `read-from-string' started. |
3733 | ||
3734 | Note that a symbol will appear multiple times in this list, if it was | |
3735 | read multiple times. The list is in the same order as the symbols | |
3736 | were read in. */); | |
3737 | Vread_symbol_positions_list = Qnil; | |
3738 | ||
078e7b4a | 3739 | DEFVAR_LISP ("load-path", &Vload_path, |
5de38842 PJ |
3740 | doc: /* *List of directories to search for files to load. |
3741 | Each element is a string (directory name) or nil (try default directory). | |
3742 | Initialized based on EMACSLOADPATH environment variable, if any, | |
3743 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 3744 | |
e61b9b87 | 3745 | DEFVAR_LISP ("load-suffixes", &Vload_suffixes, |
5de38842 PJ |
3746 | doc: /* *List of suffixes to try for files to load. |
3747 | This list should not include the empty string. */); | |
e61b9b87 SM |
3748 | Vload_suffixes = Fcons (build_string (".elc"), |
3749 | Fcons (build_string (".el"), Qnil)); | |
ddb716ef SM |
3750 | /* We don't use empty_string because it's not initialized yet. */ |
3751 | default_suffixes = Fcons (build_string (""), Qnil); | |
e61b9b87 SM |
3752 | staticpro (&default_suffixes); |
3753 | ||
078e7b4a | 3754 | DEFVAR_BOOL ("load-in-progress", &load_in_progress, |
5de38842 | 3755 | doc: /* Non-nil iff inside of `load'. */); |
078e7b4a JB |
3756 | |
3757 | DEFVAR_LISP ("after-load-alist", &Vafter_load_alist, | |
5de38842 PJ |
3758 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
3759 | Each element looks like (FILENAME FORMS...). | |
3760 | When `load' is run and the file-name argument is FILENAME, | |
3761 | the FORMS in the corresponding element are executed at the end of loading. | |
3762 | ||
3763 | FILENAME must match exactly! Normally FILENAME is the name of a library, | |
3764 | with no directory specified, since that is how `load' is normally called. | |
3765 | An error in FORMS does not undo the load, | |
3766 | but does prevent execution of the rest of the FORMS. | |
3767 | FILENAME can also be a symbol (a feature) and FORMS are then executed | |
3768 | when the corresponding call to `provide' is made. */); | |
078e7b4a JB |
3769 | Vafter_load_alist = Qnil; |
3770 | ||
ae321d28 | 3771 | DEFVAR_LISP ("load-history", &Vload_history, |
5de38842 PJ |
3772 | doc: /* Alist mapping source file names to symbols and features. |
3773 | Each alist element is a list that starts with a file name, | |
3774 | except for one element (optional) that starts with nil and describes | |
3775 | definitions evaluated from buffers not visiting files. | |
d642e4f9 RS |
3776 | The remaining elements of each list are symbols defined as functions, |
3777 | and cons cells of the form `(provide . FEATURE)', `(require . FEATURE)', | |
6042a06e RS |
3778 | `(defvar . VARIABLE), `(autoload . SYMBOL)', and `(t . SYMBOL)'. |
3779 | An element `(t . SYMBOL)' precedes an entry that is just SYMBOL, | |
3780 | and means that SYMBOL was an autoload before this file redefined it | |
3781 | as a function. */); | |
ae321d28 RS |
3782 | Vload_history = Qnil; |
3783 | ||
20ea2964 | 3784 | DEFVAR_LISP ("load-file-name", &Vload_file_name, |
5de38842 | 3785 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
3786 | Vload_file_name = Qnil; |
3787 | ||
4116ab9f | 3788 | DEFVAR_LISP ("user-init-file", &Vuser_init_file, |
5de38842 PJ |
3789 | doc: /* File name, including directory, of user's initialization file. |
3790 | If the file loaded had extension `.elc' and there was a corresponding `.el' | |
3791 | file, this variable contains the name of the .el file, suitable for use | |
3792 | by functions like `custom-save-all' which edit the init file. */); | |
4116ab9f KH |
3793 | Vuser_init_file = Qnil; |
3794 | ||
8a1f1537 | 3795 | DEFVAR_LISP ("current-load-list", &Vcurrent_load_list, |
5de38842 | 3796 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
3797 | Vcurrent_load_list = Qnil; |
3798 | ||
84a15045 | 3799 | DEFVAR_LISP ("load-read-function", &Vload_read_function, |
5de38842 PJ |
3800 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
3801 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
3802 | Vload_read_function = Qnil; |
3803 | ||
fe0e03f3 | 3804 | DEFVAR_LISP ("load-source-file-function", &Vload_source_file_function, |
5de38842 PJ |
3805 | doc: /* Function called in `load' for loading an Emacs lisp source file. |
3806 | This function is for doing code conversion before reading the source file. | |
3807 | If nil, loading is done without any code conversion. | |
3808 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
3809 | FULLNAME is the full name of FILE. | |
3810 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
3811 | Vload_source_file_function = Qnil; |
3812 | ||
b2a30870 | 3813 | DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings, |
5de38842 PJ |
3814 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
3815 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
3816 | load_force_doc_strings = 0; |
3817 | ||
94e554db | 3818 | DEFVAR_BOOL ("load-convert-to-unibyte", &load_convert_to_unibyte, |
5de38842 PJ |
3819 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
3820 | This is normally bound by `load' and `eval-buffer' to control `read', | |
3821 | and is not meant for users to change. */); | |
94e554db RS |
3822 | load_convert_to_unibyte = 0; |
3823 | ||
1521a8fa | 3824 | DEFVAR_LISP ("source-directory", &Vsource_directory, |
5de38842 PJ |
3825 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
3826 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
3827 | Vsource_directory |
3828 | = Fexpand_file_name (build_string ("../"), | |
3829 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
3830 | ||
4b104c41 | 3831 | DEFVAR_LISP ("preloaded-file-list", &Vpreloaded_file_list, |
5de38842 | 3832 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
3833 | Vpreloaded_file_list = Qnil; |
3834 | ||
1ffcc3b1 | 3835 | DEFVAR_LISP ("byte-boolean-vars", &Vbyte_boolean_vars, |
5de38842 | 3836 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
3837 | Vbyte_boolean_vars = Qnil; |
3838 | ||
da84f340 | 3839 | DEFVAR_BOOL ("load-dangerous-libraries", &load_dangerous_libraries, |
5de38842 PJ |
3840 | doc: /* Non-nil means load dangerous compiled Lisp files. |
3841 | Some versions of XEmacs use different byte codes than Emacs. These | |
3842 | incompatible byte codes can make Emacs crash when it tries to execute | |
3843 | them. */); | |
da84f340 GM |
3844 | load_dangerous_libraries = 0; |
3845 | ||
bb970e67 | 3846 | DEFVAR_LISP ("bytecomp-version-regexp", &Vbytecomp_version_regexp, |
5de38842 PJ |
3847 | doc: /* Regular expression matching safe to load compiled Lisp files. |
3848 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
3849 | from the file, and matches them against this regular expression. | |
3850 | When the regular expression matches, the file is considered to be safe | |
3851 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 3852 | Vbytecomp_version_regexp |
f2e7d5eb | 3853 | = build_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 3854 | |
a90ba1e2 KH |
3855 | /* Vsource_directory was initialized in init_lread. */ |
3856 | ||
d2c6be7f RS |
3857 | load_descriptor_list = Qnil; |
3858 | staticpro (&load_descriptor_list); | |
3859 | ||
8a1f1537 RS |
3860 | Qcurrent_load_list = intern ("current-load-list"); |
3861 | staticpro (&Qcurrent_load_list); | |
3862 | ||
078e7b4a JB |
3863 | Qstandard_input = intern ("standard-input"); |
3864 | staticpro (&Qstandard_input); | |
3865 | ||
3866 | Qread_char = intern ("read-char"); | |
3867 | staticpro (&Qread_char); | |
3868 | ||
3869 | Qget_file_char = intern ("get-file-char"); | |
3870 | staticpro (&Qget_file_char); | |
7bd279cd | 3871 | |
17634846 RS |
3872 | Qbackquote = intern ("`"); |
3873 | staticpro (&Qbackquote); | |
3874 | Qcomma = intern (","); | |
3875 | staticpro (&Qcomma); | |
3876 | Qcomma_at = intern (",@"); | |
3877 | staticpro (&Qcomma_at); | |
3878 | Qcomma_dot = intern (",."); | |
3879 | staticpro (&Qcomma_dot); | |
3880 | ||
74549846 RS |
3881 | Qinhibit_file_name_operation = intern ("inhibit-file-name-operation"); |
3882 | staticpro (&Qinhibit_file_name_operation); | |
3883 | ||
7bd279cd RS |
3884 | Qascii_character = intern ("ascii-character"); |
3885 | staticpro (&Qascii_character); | |
c2225d00 | 3886 | |
2b6cae0c RS |
3887 | Qfunction = intern ("function"); |
3888 | staticpro (&Qfunction); | |
3889 | ||
c2225d00 RS |
3890 | Qload = intern ("load"); |
3891 | staticpro (&Qload); | |
20ea2964 RS |
3892 | |
3893 | Qload_file_name = intern ("load-file-name"); | |
3894 | staticpro (&Qload_file_name); | |
11938f10 KH |
3895 | |
3896 | staticpro (&dump_path); | |
4ad679f9 EN |
3897 | |
3898 | staticpro (&read_objects); | |
3899 | read_objects = Qnil; | |
9e062b6c RS |
3900 | staticpro (&seen_list); |
3901 | ||
7ee3bd7b GM |
3902 | Vloads_in_progress = Qnil; |
3903 | staticpro (&Vloads_in_progress); | |
078e7b4a | 3904 | } |