Commit | Line | Data |
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078e7b4a | 1 | /* Lisp parsing and input streams. |
039c6cc3 | 2 | |
73b0cd50 | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
078e7b4a JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
078e7b4a | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
078e7b4a JB |
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 | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
078e7b4a JB |
19 | |
20 | ||
98280b76 | 21 | #include <config.h> |
078e7b4a JB |
22 | #include <stdio.h> |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/file.h> | |
2c1b5dbe | 26 | #include <errno.h> |
c51453d9 | 27 | #include <limits.h> /* for CHAR_BIT */ |
b3e6f69c | 28 | #include <setjmp.h> |
078e7b4a | 29 | #include "lisp.h" |
95384e1e | 30 | #include "intervals.h" |
078e7b4a | 31 | #include "buffer.h" |
1571601b | 32 | #include "character.h" |
fe0e03f3 | 33 | #include "charset.h" |
8792be66 | 34 | #include "coding.h" |
57bda87a | 35 | #include <epaths.h> |
078e7b4a | 36 | #include "commands.h" |
e37c0805 | 37 | #include "keyboard.h" |
428a555e | 38 | #include "frame.h" |
7bd279cd | 39 | #include "termhooks.h" |
eb191db2 | 40 | #include "coding.h" |
66cd0949 | 41 | #include "blockinput.h" |
078e7b4a | 42 | |
79051982 | 43 | #ifdef MSDOS |
79051982 RS |
44 | #include "msdos.h" |
45 | #endif | |
46 | ||
c1a2f60a | 47 | #include <unistd.h> |
078e7b4a | 48 | #include <math.h> |
078e7b4a | 49 | |
c011e9a5 RS |
50 | #ifdef HAVE_SETLOCALE |
51 | #include <locale.h> | |
52 | #endif /* HAVE_SETLOCALE */ | |
53 | ||
bcdec28b | 54 | #include <fcntl.h> |
f7d279f0 | 55 | |
79cf851c | 56 | #ifdef HAVE_FSEEKO |
68c45bf0 PE |
57 | #define file_offset off_t |
58 | #define file_tell ftello | |
59 | #else | |
60 | #define file_offset long | |
61 | #define file_tell ftell | |
62 | #endif | |
63 | ||
f19a0f5b | 64 | /* hash table read constants */ |
955cbe7b PE |
65 | static Lisp_Object Qhash_table, Qdata; |
66 | static Lisp_Object Qtest, Qsize; | |
67 | static Lisp_Object Qweakness; | |
68 | static Lisp_Object Qrehash_size; | |
69 | static Lisp_Object Qrehash_threshold; | |
70 | ||
71 | static Lisp_Object Qread_char, Qget_file_char, Qcurrent_load_list; | |
72 | Lisp_Object Qstandard_input; | |
29208e82 | 73 | Lisp_Object Qvariable_documentation; |
955cbe7b | 74 | static Lisp_Object Qascii_character, Qload, Qload_file_name; |
2b6cae0c | 75 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction; |
955cbe7b PE |
76 | static Lisp_Object Qinhibit_file_name_operation; |
77 | static Lisp_Object Qeval_buffer_list; | |
78 | static Lisp_Object Qlexical_binding; | |
79 | static Lisp_Object Qfile_truename, Qdo_after_load_evaluation; /* ACM 2006/5/16 */ | |
7bd279cd | 80 | |
8792be66 KH |
81 | /* Used instead of Qget_file_char while loading *.elc files compiled |
82 | by Emacs 21 or older. */ | |
83 | static Lisp_Object Qget_emacs_mule_file_char; | |
84 | ||
85 | static Lisp_Object Qload_force_doc_strings; | |
86 | ||
b9598260 | 87 | extern Lisp_Object Qinternal_interpreter_environment; |
078e7b4a | 88 | |
2baf5e76 | 89 | static Lisp_Object Qload_in_progress; |
ece435a5 | 90 | |
4ad679f9 EN |
91 | /* The association list of objects read with the #n=object form. |
92 | Each member of the list has the form (n . object), and is used to | |
93 | look up the object for the corresponding #n# construct. | |
94 | It must be set to nil before all top-level calls to read0. */ | |
1e3890d1 | 95 | static Lisp_Object read_objects; |
4ad679f9 | 96 | |
8792be66 KH |
97 | /* Nonzero means READCHAR should read bytes one by one (not character) |
98 | when READCHARFUN is Qget_file_char or Qget_emacs_mule_file_char. | |
99 | This is set to 1 by read1 temporarily while handling #@NUMBER. */ | |
100 | static int load_each_byte; | |
101 | ||
d2c6be7f RS |
102 | /* List of descriptors now open for Fload. */ |
103 | static Lisp_Object load_descriptor_list; | |
104 | ||
b2a30870 | 105 | /* File for get_file_char to read from. Use by load. */ |
078e7b4a JB |
106 | static FILE *instream; |
107 | ||
108 | /* When nonzero, read conses in pure space */ | |
109 | static int read_pure; | |
110 | ||
b2a30870 | 111 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
d311d28c PE |
112 | static ptrdiff_t read_from_string_index; |
113 | static ptrdiff_t read_from_string_index_byte; | |
114 | static ptrdiff_t read_from_string_limit; | |
17634846 | 115 | |
abb13b09 CW |
116 | /* Number of characters read in the current call to Fread or |
117 | Fread_from_string. */ | |
da43f021 | 118 | static EMACS_INT readchar_count; |
6f7f43d5 | 119 | |
c15cfd1f | 120 | /* This contains the last string skipped with #@. */ |
b2a30870 RS |
121 | static char *saved_doc_string; |
122 | /* Length of buffer allocated in saved_doc_string. */ | |
bfbbd7e7 | 123 | static ptrdiff_t saved_doc_string_size; |
b2a30870 | 124 | /* Length of actual data in saved_doc_string. */ |
bfbbd7e7 | 125 | static ptrdiff_t saved_doc_string_length; |
b2a30870 | 126 | /* This is the file position that string came from. */ |
68c45bf0 | 127 | static file_offset saved_doc_string_position; |
b2a30870 | 128 | |
c15cfd1f RS |
129 | /* This contains the previous string skipped with #@. |
130 | We copy it from saved_doc_string when a new string | |
131 | is put in saved_doc_string. */ | |
132 | static char *prev_saved_doc_string; | |
133 | /* Length of buffer allocated in prev_saved_doc_string. */ | |
bfbbd7e7 | 134 | static ptrdiff_t prev_saved_doc_string_size; |
c15cfd1f | 135 | /* Length of actual data in prev_saved_doc_string. */ |
bfbbd7e7 | 136 | static ptrdiff_t prev_saved_doc_string_length; |
c15cfd1f | 137 | /* This is the file position that string came from. */ |
68c45bf0 | 138 | static file_offset prev_saved_doc_string_position; |
c15cfd1f | 139 | |
17634846 RS |
140 | /* Nonzero means inside a new-style backquote |
141 | with no surrounding parentheses. | |
142 | Fread initializes this to zero, so we need not specbind it | |
143 | or worry about what happens to it when there is an error. */ | |
144 | static int new_backquote_flag; | |
29208e82 | 145 | static Lisp_Object Qold_style_backquotes; |
7ee3bd7b GM |
146 | |
147 | /* A list of file names for files being loaded in Fload. Used to | |
148 | check for recursive loads. */ | |
149 | ||
9942fa0c | 150 | static Lisp_Object Vloads_in_progress; |
7ee3bd7b | 151 | |
f57e2426 J |
152 | static int read_emacs_mule_char (int, int (*) (int, Lisp_Object), |
153 | Lisp_Object); | |
8792be66 | 154 | |
defb1411 | 155 | static void readevalloop (Lisp_Object, FILE*, Lisp_Object, int, |
f57e2426 J |
156 | Lisp_Object, Lisp_Object, |
157 | Lisp_Object, Lisp_Object); | |
158 | static Lisp_Object load_unwind (Lisp_Object); | |
159 | static Lisp_Object load_descriptor_unwind (Lisp_Object); | |
550a625e | 160 | |
e4d29b33 | 161 | static void invalid_syntax (const char *) NO_RETURN; |
971de7fb | 162 | static void end_of_file_error (void) NO_RETURN; |
336d4a9c | 163 | |
078e7b4a | 164 | \f |
8792be66 KH |
165 | /* Functions that read one byte from the current source READCHARFUN |
166 | or unreads one byte. If the integer argument C is -1, it returns | |
167 | one read byte, or -1 when there's no more byte in the source. If C | |
168 | is 0 or positive, it unreads C, and the return value is not | |
169 | interesting. */ | |
170 | ||
f57e2426 J |
171 | static int readbyte_for_lambda (int, Lisp_Object); |
172 | static int readbyte_from_file (int, Lisp_Object); | |
173 | static int readbyte_from_string (int, Lisp_Object); | |
8792be66 | 174 | |
078e7b4a JB |
175 | /* Handle unreading and rereading of characters. |
176 | Write READCHAR to read a character, | |
fe0e03f3 KH |
177 | UNREAD(c) to unread c to be read again. |
178 | ||
8792be66 | 179 | These macros correctly read/unread multibyte characters. */ |
078e7b4a | 180 | |
1202434b | 181 | #define READCHAR readchar (readcharfun, NULL) |
078e7b4a JB |
182 | #define UNREAD(c) unreadchar (readcharfun, c) |
183 | ||
1202434b KH |
184 | /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */ |
185 | #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte) | |
186 | ||
8792be66 | 187 | /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char, |
8f924df7 KH |
188 | Qlambda, or a cons, we use this to keep an unread character because |
189 | a file stream can't handle multibyte-char unreading. The value -1 | |
8792be66 KH |
190 | means that there's no unread character. */ |
191 | static int unread_char; | |
192 | ||
078e7b4a | 193 | static int |
971de7fb | 194 | readchar (Lisp_Object readcharfun, int *multibyte) |
078e7b4a JB |
195 | { |
196 | Lisp_Object tem; | |
95384e1e | 197 | register int c; |
f57e2426 | 198 | int (*readbyte) (int, Lisp_Object); |
8792be66 KH |
199 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; |
200 | int i, len; | |
201 | int emacs_mule_encoding = 0; | |
078e7b4a | 202 | |
1202434b KH |
203 | if (multibyte) |
204 | *multibyte = 0; | |
205 | ||
abb13b09 | 206 | readchar_count++; |
177c0ea7 | 207 | |
cfff016d | 208 | if (BUFFERP (readcharfun)) |
078e7b4a | 209 | { |
bed23cb2 | 210 | register struct buffer *inbuffer = XBUFFER (readcharfun); |
078e7b4a | 211 | |
d311d28c | 212 | ptrdiff_t pt_byte = BUF_PT_BYTE (inbuffer); |
00a9a935 | 213 | |
bed23cb2 RS |
214 | if (pt_byte >= BUF_ZV_BYTE (inbuffer)) |
215 | return -1; | |
078e7b4a | 216 | |
4b4deea2 | 217 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 218 | { |
00a9a935 | 219 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
220 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, pt_byte); |
221 | BUF_INC_POS (inbuffer, pt_byte); | |
62a6e103 | 222 | c = STRING_CHAR (p); |
1202434b KH |
223 | if (multibyte) |
224 | *multibyte = 1; | |
bed23cb2 RS |
225 | } |
226 | else | |
227 | { | |
228 | c = BUF_FETCH_BYTE (inbuffer, pt_byte); | |
8792be66 KH |
229 | if (! ASCII_BYTE_P (c)) |
230 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 231 | pt_byte++; |
6f7f43d5 | 232 | } |
bed23cb2 | 233 | SET_BUF_PT_BOTH (inbuffer, BUF_PT (inbuffer) + 1, pt_byte); |
6f7f43d5 | 234 | |
bed23cb2 | 235 | return c; |
078e7b4a | 236 | } |
cfff016d | 237 | if (MARKERP (readcharfun)) |
078e7b4a | 238 | { |
bed23cb2 | 239 | register struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
078e7b4a | 240 | |
d311d28c | 241 | ptrdiff_t bytepos = marker_byte_position (readcharfun); |
00a9a935 | 242 | |
bed23cb2 RS |
243 | if (bytepos >= BUF_ZV_BYTE (inbuffer)) |
244 | return -1; | |
6f7f43d5 | 245 | |
4b4deea2 | 246 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 247 | { |
00a9a935 | 248 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
249 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, bytepos); |
250 | BUF_INC_POS (inbuffer, bytepos); | |
62a6e103 | 251 | c = STRING_CHAR (p); |
1202434b KH |
252 | if (multibyte) |
253 | *multibyte = 1; | |
bed23cb2 RS |
254 | } |
255 | else | |
256 | { | |
257 | c = BUF_FETCH_BYTE (inbuffer, bytepos); | |
8792be66 KH |
258 | if (! ASCII_BYTE_P (c)) |
259 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 260 | bytepos++; |
6f7f43d5 RS |
261 | } |
262 | ||
bed23cb2 RS |
263 | XMARKER (readcharfun)->bytepos = bytepos; |
264 | XMARKER (readcharfun)->charpos++; | |
265 | ||
266 | return c; | |
078e7b4a | 267 | } |
ad0153e4 RS |
268 | |
269 | if (EQ (readcharfun, Qlambda)) | |
8792be66 KH |
270 | { |
271 | readbyte = readbyte_for_lambda; | |
272 | goto read_multibyte; | |
273 | } | |
ad0153e4 | 274 | |
078e7b4a | 275 | if (EQ (readcharfun, Qget_file_char)) |
2c1b5dbe | 276 | { |
8792be66 KH |
277 | readbyte = readbyte_from_file; |
278 | goto read_multibyte; | |
2c1b5dbe | 279 | } |
078e7b4a | 280 | |
cfff016d | 281 | if (STRINGP (readcharfun)) |
078e7b4a | 282 | { |
bed23cb2 | 283 | if (read_from_string_index >= read_from_string_limit) |
078e7b4a | 284 | c = -1; |
1202434b KH |
285 | else if (STRING_MULTIBYTE (readcharfun)) |
286 | { | |
287 | if (multibyte) | |
288 | *multibyte = 1; | |
289 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, readcharfun, | |
290 | read_from_string_index, | |
291 | read_from_string_index_byte); | |
292 | } | |
f0354c03 | 293 | else |
1202434b KH |
294 | { |
295 | c = SREF (readcharfun, read_from_string_index_byte); | |
296 | read_from_string_index++; | |
297 | read_from_string_index_byte++; | |
298 | } | |
078e7b4a JB |
299 | return c; |
300 | } | |
301 | ||
8792be66 KH |
302 | if (CONSP (readcharfun)) |
303 | { | |
304 | /* This is the case that read_vector is reading from a unibyte | |
305 | string that contains a byte sequence previously skipped | |
306 | because of #@NUMBER. The car part of readcharfun is that | |
307 | string, and the cdr part is a value of readcharfun given to | |
308 | read_vector. */ | |
309 | readbyte = readbyte_from_string; | |
310 | if (EQ (XCDR (readcharfun), Qget_emacs_mule_file_char)) | |
311 | emacs_mule_encoding = 1; | |
312 | goto read_multibyte; | |
313 | } | |
8f924df7 | 314 | |
8792be66 KH |
315 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) |
316 | { | |
317 | readbyte = readbyte_from_file; | |
318 | emacs_mule_encoding = 1; | |
319 | goto read_multibyte; | |
320 | } | |
078e7b4a JB |
321 | |
322 | tem = call0 (readcharfun); | |
323 | ||
265a9e55 | 324 | if (NILP (tem)) |
078e7b4a JB |
325 | return -1; |
326 | return XINT (tem); | |
8792be66 KH |
327 | |
328 | read_multibyte: | |
329 | if (unread_char >= 0) | |
330 | { | |
331 | c = unread_char; | |
332 | unread_char = -1; | |
333 | return c; | |
334 | } | |
335 | c = (*readbyte) (-1, readcharfun); | |
1202434b KH |
336 | if (c < 0 || load_each_byte) |
337 | return c; | |
338 | if (multibyte) | |
339 | *multibyte = 1; | |
340 | if (ASCII_BYTE_P (c)) | |
8792be66 KH |
341 | return c; |
342 | if (emacs_mule_encoding) | |
343 | return read_emacs_mule_char (c, readbyte, readcharfun); | |
344 | i = 0; | |
345 | buf[i++] = c; | |
346 | len = BYTES_BY_CHAR_HEAD (c); | |
347 | while (i < len) | |
348 | { | |
349 | c = (*readbyte) (-1, readcharfun); | |
350 | if (c < 0 || ! TRAILING_CODE_P (c)) | |
351 | { | |
352 | while (--i > 1) | |
353 | (*readbyte) (buf[i], readcharfun); | |
354 | return BYTE8_TO_CHAR (buf[0]); | |
355 | } | |
356 | buf[i++] = c; | |
357 | } | |
62a6e103 | 358 | return STRING_CHAR (buf); |
078e7b4a JB |
359 | } |
360 | ||
361 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
362 | If the stream is a user function, call it with the char as argument. */ | |
363 | ||
364 | static void | |
971de7fb | 365 | unreadchar (Lisp_Object readcharfun, int c) |
078e7b4a | 366 | { |
abb13b09 | 367 | readchar_count--; |
92fddec9 KH |
368 | if (c == -1) |
369 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
370 | since readchar didn't advance it when we read it. */ | |
371 | ; | |
cfff016d | 372 | else if (BUFFERP (readcharfun)) |
d7760ca9 | 373 | { |
bed23cb2 | 374 | struct buffer *b = XBUFFER (readcharfun); |
d311d28c PE |
375 | ptrdiff_t charpos = BUF_PT (b); |
376 | ptrdiff_t bytepos = BUF_PT_BYTE (b); | |
d7760ca9 | 377 | |
4b4deea2 | 378 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 379 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 380 | else |
8792be66 | 381 | bytepos--; |
d7760ca9 | 382 | |
cffc6f3b | 383 | SET_BUF_PT_BOTH (b, charpos - 1, bytepos); |
d7760ca9 | 384 | } |
cfff016d | 385 | else if (MARKERP (readcharfun)) |
d7760ca9 | 386 | { |
bed23cb2 | 387 | struct buffer *b = XMARKER (readcharfun)->buffer; |
d311d28c | 388 | ptrdiff_t bytepos = XMARKER (readcharfun)->bytepos; |
d7760ca9 | 389 | |
8792be66 | 390 | XMARKER (readcharfun)->charpos--; |
4b4deea2 | 391 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 392 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 393 | else |
8792be66 | 394 | bytepos--; |
d7760ca9 | 395 | |
8792be66 | 396 | XMARKER (readcharfun)->bytepos = bytepos; |
d7760ca9 | 397 | } |
cfff016d | 398 | else if (STRINGP (readcharfun)) |
bed23cb2 RS |
399 | { |
400 | read_from_string_index--; | |
401 | read_from_string_index_byte | |
402 | = string_char_to_byte (readcharfun, read_from_string_index); | |
403 | } | |
8792be66 KH |
404 | else if (CONSP (readcharfun)) |
405 | { | |
406 | unread_char = c; | |
407 | } | |
ad0153e4 | 408 | else if (EQ (readcharfun, Qlambda)) |
8792be66 KH |
409 | { |
410 | unread_char = c; | |
411 | } | |
412 | else if (EQ (readcharfun, Qget_file_char) | |
413 | || EQ (readcharfun, Qget_emacs_mule_file_char)) | |
414 | { | |
415 | if (load_each_byte) | |
d85d3839 MB |
416 | { |
417 | BLOCK_INPUT; | |
418 | ungetc (c, instream); | |
419 | UNBLOCK_INPUT; | |
420 | } | |
8792be66 KH |
421 | else |
422 | unread_char = c; | |
423 | } | |
078e7b4a JB |
424 | else |
425 | call1 (readcharfun, make_number (c)); | |
426 | } | |
427 | ||
8792be66 | 428 | static int |
971de7fb | 429 | readbyte_for_lambda (int c, Lisp_Object readcharfun) |
8792be66 KH |
430 | { |
431 | return read_bytecode_char (c >= 0); | |
432 | } | |
433 | ||
434 | ||
435 | static int | |
971de7fb | 436 | readbyte_from_file (int c, Lisp_Object readcharfun) |
8792be66 KH |
437 | { |
438 | if (c >= 0) | |
439 | { | |
66cd0949 | 440 | BLOCK_INPUT; |
8792be66 | 441 | ungetc (c, instream); |
66cd0949 | 442 | UNBLOCK_INPUT; |
8792be66 KH |
443 | return 0; |
444 | } | |
445 | ||
d85d3839 | 446 | BLOCK_INPUT; |
8792be66 | 447 | c = getc (instream); |
d85d3839 | 448 | |
8792be66 | 449 | #ifdef EINTR |
d85d3839 MB |
450 | /* Interrupted reads have been observed while reading over the network */ |
451 | while (c == EOF && ferror (instream) && errno == EINTR) | |
452 | { | |
57cb2e6f | 453 | UNBLOCK_INPUT; |
d85d3839 | 454 | QUIT; |
d85d3839 | 455 | BLOCK_INPUT; |
57cb2e6f | 456 | clearerr (instream); |
d85d3839 | 457 | c = getc (instream); |
66cd0949 | 458 | } |
8792be66 | 459 | #endif |
d85d3839 | 460 | |
57cb2e6f MB |
461 | UNBLOCK_INPUT; |
462 | ||
8792be66 KH |
463 | return (c == EOF ? -1 : c); |
464 | } | |
465 | ||
466 | static int | |
971de7fb | 467 | readbyte_from_string (int c, Lisp_Object readcharfun) |
8792be66 KH |
468 | { |
469 | Lisp_Object string = XCAR (readcharfun); | |
470 | ||
471 | if (c >= 0) | |
472 | { | |
473 | read_from_string_index--; | |
474 | read_from_string_index_byte | |
475 | = string_char_to_byte (string, read_from_string_index); | |
476 | } | |
8f924df7 | 477 | |
8792be66 KH |
478 | if (read_from_string_index >= read_from_string_limit) |
479 | c = -1; | |
480 | else | |
481 | FETCH_STRING_CHAR_ADVANCE (c, string, | |
482 | read_from_string_index, | |
483 | read_from_string_index_byte); | |
484 | return c; | |
485 | } | |
486 | ||
487 | ||
488 | /* Read one non-ASCII character from INSTREAM. The character is | |
489 | encoded in `emacs-mule' and the first byte is already read in | |
490 | C. */ | |
491 | ||
8792be66 | 492 | static int |
971de7fb | 493 | read_emacs_mule_char (int c, int (*readbyte) (int, Lisp_Object), Lisp_Object readcharfun) |
8792be66 KH |
494 | { |
495 | /* Emacs-mule coding uses at most 4-byte for one character. */ | |
496 | unsigned char buf[4]; | |
497 | int len = emacs_mule_bytes[c]; | |
498 | struct charset *charset; | |
499 | int i; | |
500 | unsigned code; | |
501 | ||
502 | if (len == 1) | |
503 | /* C is not a valid leading-code of `emacs-mule'. */ | |
504 | return BYTE8_TO_CHAR (c); | |
505 | ||
506 | i = 0; | |
507 | buf[i++] = c; | |
508 | while (i < len) | |
509 | { | |
510 | c = (*readbyte) (-1, readcharfun); | |
511 | if (c < 0xA0) | |
512 | { | |
513 | while (--i > 1) | |
514 | (*readbyte) (buf[i], readcharfun); | |
515 | return BYTE8_TO_CHAR (buf[0]); | |
516 | } | |
517 | buf[i++] = c; | |
518 | } | |
519 | ||
520 | if (len == 2) | |
521 | { | |
b84ae584 | 522 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
523 | code = buf[1] & 0x7F; |
524 | } | |
525 | else if (len == 3) | |
526 | { | |
527 | if (buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11 | |
528 | || buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
529 | { | |
b84ae584 | 530 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8792be66 KH |
531 | code = buf[2] & 0x7F; |
532 | } | |
533 | else | |
534 | { | |
b84ae584 | 535 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
536 | code = ((buf[1] << 8) | buf[2]) & 0x7F7F; |
537 | } | |
538 | } | |
539 | else | |
540 | { | |
b84ae584 | 541 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8f924df7 | 542 | code = ((buf[2] << 8) | buf[3]) & 0x7F7F; |
8792be66 KH |
543 | } |
544 | c = DECODE_CHAR (charset, code); | |
545 | if (c < 0) | |
546 | Fsignal (Qinvalid_read_syntax, | |
547 | Fcons (build_string ("invalid multibyte form"), Qnil)); | |
548 | return c; | |
549 | } | |
550 | ||
551 | ||
f57e2426 J |
552 | static Lisp_Object read_internal_start (Lisp_Object, Lisp_Object, |
553 | Lisp_Object); | |
554 | static Lisp_Object read0 (Lisp_Object); | |
555 | static Lisp_Object read1 (Lisp_Object, int *, int); | |
abb13b09 | 556 | |
f57e2426 J |
557 | static Lisp_Object read_list (int, Lisp_Object); |
558 | static Lisp_Object read_vector (Lisp_Object, int); | |
abb13b09 | 559 | |
f57e2426 J |
560 | static Lisp_Object substitute_object_recurse (Lisp_Object, Lisp_Object, |
561 | Lisp_Object); | |
562 | static void substitute_object_in_subtree (Lisp_Object, | |
563 | Lisp_Object); | |
564 | static void substitute_in_interval (INTERVAL, Lisp_Object); | |
9e062b6c | 565 | |
078e7b4a | 566 | \f |
bed23cb2 | 567 | /* Get a character from the tty. */ |
078e7b4a | 568 | |
f42be754 JB |
569 | /* Read input events until we get one that's acceptable for our purposes. |
570 | ||
571 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
572 | until we get a character we like, and then stuffed into | |
573 | unread_switch_frame. | |
574 | ||
575 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
576 | if the unmodified version of the symbol has a Qascii_character | |
577 | property, and use that character, if present. | |
578 | ||
579 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
580 | get isn't an ASCII character with modifiers. If it's zero but | |
581 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
bb49a192 RS |
582 | character. |
583 | ||
584 | If INPUT_METHOD is nonzero, we invoke the current input method | |
50e48299 CY |
585 | if the character warrants that. |
586 | ||
587 | If SECONDS is a number, we wait that many seconds for input, and | |
588 | return Qnil if no input arrives within that time. */ | |
cc39bc38 | 589 | |
2f7c71a1 | 590 | static Lisp_Object |
d5a3eaaf AS |
591 | read_filtered_event (int no_switch_frame, int ascii_required, |
592 | int error_nonascii, int input_method, Lisp_Object seconds) | |
f42be754 | 593 | { |
4332cf50 | 594 | Lisp_Object val, delayed_switch_frame; |
50e48299 | 595 | EMACS_TIME end_time; |
153a17b7 | 596 | |
5dbf89bc | 597 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
598 | if (display_hourglass_p) |
599 | cancel_hourglass (); | |
5dbf89bc | 600 | #endif |
177c0ea7 | 601 | |
153a17b7 | 602 | delayed_switch_frame = Qnil; |
f42be754 | 603 | |
50e48299 CY |
604 | /* Compute timeout. */ |
605 | if (NUMBERP (seconds)) | |
606 | { | |
607 | EMACS_TIME wait_time; | |
608 | int sec, usec; | |
51d8b30e | 609 | double duration = extract_float (seconds); |
50e48299 | 610 | |
1ab7b8ac PE |
611 | if (0 < duration) |
612 | duration_to_sec_usec (duration, &sec, &usec); | |
613 | else | |
614 | sec = usec = 0; | |
615 | ||
50e48299 CY |
616 | EMACS_GET_TIME (end_time); |
617 | EMACS_SET_SECS_USECS (wait_time, sec, usec); | |
618 | EMACS_ADD_TIME (end_time, end_time, wait_time); | |
619 | } | |
620 | ||
251bc578 | 621 | /* Read until we get an acceptable event. */ |
f42be754 | 622 | retry: |
88852d45 | 623 | do |
251bc578 KL |
624 | val = read_char (0, 0, 0, (input_method ? Qnil : Qt), 0, |
625 | NUMBERP (seconds) ? &end_time : NULL); | |
9688ff53 | 626 | while (INTEGERP (val) && XINT (val) == -2); /* wrong_kboard_jmpbuf */ |
f42be754 | 627 | |
cfff016d | 628 | if (BUFFERP (val)) |
6c82d689 KH |
629 | goto retry; |
630 | ||
f42be754 | 631 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 632 | character. This is better than signaling an error just because |
f42be754 JB |
633 | the last characters were typed to a separate minibuffer frame, |
634 | for example. Eventually, some code which can deal with | |
635 | switch-frame events will read it and process it. */ | |
636 | if (no_switch_frame | |
637 | && EVENT_HAS_PARAMETERS (val) | |
ca77ee45 | 638 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val)), Qswitch_frame)) |
f42be754 JB |
639 | { |
640 | delayed_switch_frame = val; | |
641 | goto retry; | |
642 | } | |
643 | ||
50e48299 | 644 | if (ascii_required && !(NUMBERP (seconds) && NILP (val))) |
f42be754 JB |
645 | { |
646 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 647 | if (SYMBOLP (val)) |
f42be754 | 648 | { |
95384e1e | 649 | Lisp_Object tem, tem1; |
f42be754 JB |
650 | tem = Fget (val, Qevent_symbol_element_mask); |
651 | if (!NILP (tem)) | |
652 | { | |
653 | tem1 = Fget (Fcar (tem), Qascii_character); | |
654 | /* Merge this symbol's modifier bits | |
655 | with the ASCII equivalent of its basic code. */ | |
656 | if (!NILP (tem1)) | |
baf69866 | 657 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
658 | } |
659 | } | |
177c0ea7 | 660 | |
f42be754 | 661 | /* If we don't have a character now, deal with it appropriately. */ |
cfff016d | 662 | if (!INTEGERP (val)) |
f42be754 JB |
663 | { |
664 | if (error_nonascii) | |
665 | { | |
1ec84625 | 666 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
667 | error ("Non-character input-event"); |
668 | } | |
669 | else | |
670 | goto retry; | |
671 | } | |
672 | } | |
673 | ||
674 | if (! NILP (delayed_switch_frame)) | |
675 | unread_switch_frame = delayed_switch_frame; | |
676 | ||
67868d27 PJ |
677 | #if 0 |
678 | ||
5dbf89bc | 679 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
680 | if (display_hourglass_p) |
681 | start_hourglass (); | |
5dbf89bc | 682 | #endif |
67868d27 PJ |
683 | |
684 | #endif | |
685 | ||
f42be754 | 686 | return val; |
f42be754 JB |
687 | } |
688 | ||
a7ca3326 | 689 | DEFUN ("read-char", Fread_char, Sread_char, 0, 3, 0, |
5de38842 PJ |
690 | doc: /* Read a character from the command input (keyboard or macro). |
691 | It is returned as a number. | |
fb26c2af KH |
692 | If the character has modifiers, they are resolved and reflected to the |
693 | character code if possible (e.g. C-SPC -> 0). | |
694 | ||
5de38842 PJ |
695 | If the user generates an event which is not a character (i.e. a mouse |
696 | click or function key event), `read-char' signals an error. As an | |
fb26c2af KH |
697 | exception, switch-frame events are put off until non-character events |
698 | can be read. | |
5de38842 PJ |
699 | If you want to read non-character events, or ignore them, call |
700 | `read-event' or `read-char-exclusive' instead. | |
701 | ||
702 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
703 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
704 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
705 | is used for reading a character. |
706 | If the optional argument SECONDS is non-nil, it should be a number | |
707 | specifying the maximum number of seconds to wait for input. If no | |
708 | input arrives in that time, return nil. SECONDS may be a | |
709 | floating-point value. */) | |
5842a27b | 710 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 711 | { |
fb26c2af | 712 | Lisp_Object val; |
fb26c2af | 713 | |
bb49a192 RS |
714 | if (! NILP (prompt)) |
715 | message_with_string ("%s", prompt, 0); | |
fb26c2af | 716 | val = read_filtered_event (1, 1, 1, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
717 | |
718 | return (NILP (val) ? Qnil | |
719 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a JB |
720 | } |
721 | ||
a7ca3326 | 722 | DEFUN ("read-event", Fread_event, Sread_event, 0, 3, 0, |
5de38842 PJ |
723 | doc: /* Read an event object from the input stream. |
724 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
725 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
726 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
727 | is used for reading a character. |
728 | If the optional argument SECONDS is non-nil, it should be a number | |
729 | specifying the maximum number of seconds to wait for input. If no | |
730 | input arrives in that time, return nil. SECONDS may be a | |
731 | floating-point value. */) | |
5842a27b | 732 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 733 | { |
bb49a192 RS |
734 | if (! NILP (prompt)) |
735 | message_with_string ("%s", prompt, 0); | |
50e48299 | 736 | return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method), seconds); |
078e7b4a JB |
737 | } |
738 | ||
50e48299 | 739 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 3, 0, |
5de38842 PJ |
740 | doc: /* Read a character from the command input (keyboard or macro). |
741 | It is returned as a number. Non-character events are ignored. | |
fb26c2af KH |
742 | If the character has modifiers, they are resolved and reflected to the |
743 | character code if possible (e.g. C-SPC -> 0). | |
5de38842 PJ |
744 | |
745 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
746 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
747 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
748 | is used for reading a character. |
749 | If the optional argument SECONDS is non-nil, it should be a number | |
750 | specifying the maximum number of seconds to wait for input. If no | |
751 | input arrives in that time, return nil. SECONDS may be a | |
752 | floating-point value. */) | |
5842a27b | 753 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 754 | { |
fb26c2af | 755 | Lisp_Object val; |
fb26c2af | 756 | |
bb49a192 RS |
757 | if (! NILP (prompt)) |
758 | message_with_string ("%s", prompt, 0); | |
66c410ce | 759 | |
fb26c2af | 760 | val = read_filtered_event (1, 1, 0, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
761 | |
762 | return (NILP (val) ? Qnil | |
763 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a | 764 | } |
078e7b4a JB |
765 | |
766 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
5de38842 | 767 | doc: /* Don't use this yourself. */) |
5842a27b | 768 | (void) |
078e7b4a JB |
769 | { |
770 | register Lisp_Object val; | |
66cd0949 | 771 | BLOCK_INPUT; |
1805de4f | 772 | XSETINT (val, getc (instream)); |
66cd0949 | 773 | UNBLOCK_INPUT; |
078e7b4a JB |
774 | return val; |
775 | } | |
da84f340 GM |
776 | |
777 | ||
550a625e | 778 | \f |
b9598260 SM |
779 | |
780 | /* Return true if the lisp code read using READCHARFUN defines a non-nil | |
781 | `lexical-binding' file variable. After returning, the stream is | |
782 | positioned following the first line, if it is a comment, otherwise | |
783 | nothing is read. */ | |
784 | ||
785 | static int | |
c566235d | 786 | lisp_file_lexically_bound_p (Lisp_Object readcharfun) |
b9598260 SM |
787 | { |
788 | int ch = READCHAR; | |
789 | if (ch != ';') | |
790 | /* The first line isn't a comment, just give up. */ | |
791 | { | |
792 | UNREAD (ch); | |
793 | return 0; | |
794 | } | |
795 | else | |
796 | /* Look for an appropriate file-variable in the first line. */ | |
797 | { | |
798 | int rv = 0; | |
799 | enum { | |
800 | NOMINAL, AFTER_FIRST_DASH, AFTER_ASTERIX, | |
801 | } beg_end_state = NOMINAL; | |
802 | int in_file_vars = 0; | |
803 | ||
7200d79c SM |
804 | #define UPDATE_BEG_END_STATE(ch) \ |
805 | if (beg_end_state == NOMINAL) \ | |
806 | beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \ | |
807 | else if (beg_end_state == AFTER_FIRST_DASH) \ | |
808 | beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \ | |
809 | else if (beg_end_state == AFTER_ASTERIX) \ | |
810 | { \ | |
811 | if (ch == '-') \ | |
812 | in_file_vars = !in_file_vars; \ | |
813 | beg_end_state = NOMINAL; \ | |
b9598260 SM |
814 | } |
815 | ||
816 | /* Skip until we get to the file vars, if any. */ | |
817 | do | |
818 | { | |
819 | ch = READCHAR; | |
820 | UPDATE_BEG_END_STATE (ch); | |
821 | } | |
822 | while (!in_file_vars && ch != '\n' && ch != EOF); | |
823 | ||
824 | while (in_file_vars) | |
825 | { | |
06a0259a | 826 | char var[100], val[100]; |
3c346cc3 | 827 | unsigned i; |
b9598260 SM |
828 | |
829 | ch = READCHAR; | |
830 | ||
831 | /* Read a variable name. */ | |
832 | while (ch == ' ' || ch == '\t') | |
833 | ch = READCHAR; | |
834 | ||
06a0259a | 835 | i = 0; |
db7a0b4f | 836 | while (ch != ':' && ch != '\n' && ch != EOF && in_file_vars) |
b9598260 | 837 | { |
06a0259a PE |
838 | if (i < sizeof var - 1) |
839 | var[i++] = ch; | |
b9598260 SM |
840 | UPDATE_BEG_END_STATE (ch); |
841 | ch = READCHAR; | |
842 | } | |
7200d79c | 843 | |
db7a0b4f AS |
844 | /* Stop scanning if no colon was found before end marker. */ |
845 | if (!in_file_vars) | |
846 | break; | |
847 | ||
06a0259a PE |
848 | while (i > 0 && (var[i - 1] == ' ' || var[i - 1] == '\t')) |
849 | i--; | |
850 | var[i] = '\0'; | |
b9598260 SM |
851 | |
852 | if (ch == ':') | |
853 | { | |
854 | /* Read a variable value. */ | |
855 | ch = READCHAR; | |
856 | ||
857 | while (ch == ' ' || ch == '\t') | |
858 | ch = READCHAR; | |
859 | ||
06a0259a | 860 | i = 0; |
b9598260 SM |
861 | while (ch != ';' && ch != '\n' && ch != EOF && in_file_vars) |
862 | { | |
06a0259a PE |
863 | if (i < sizeof val - 1) |
864 | val[i++] = ch; | |
b9598260 SM |
865 | UPDATE_BEG_END_STATE (ch); |
866 | ch = READCHAR; | |
867 | } | |
868 | if (! in_file_vars) | |
869 | /* The value was terminated by an end-marker, which | |
870 | remove. */ | |
06a0259a PE |
871 | i -= 3; |
872 | while (i > 0 && (val[i - 1] == ' ' || val[i - 1] == '\t')) | |
873 | i--; | |
874 | val[i] = '\0'; | |
b9598260 SM |
875 | |
876 | if (strcmp (var, "lexical-binding") == 0) | |
877 | /* This is it... */ | |
878 | { | |
879 | rv = (strcmp (val, "nil") != 0); | |
880 | break; | |
881 | } | |
882 | } | |
883 | } | |
884 | ||
885 | while (ch != '\n' && ch != EOF) | |
886 | ch = READCHAR; | |
887 | ||
888 | return rv; | |
889 | } | |
890 | } | |
b9598260 | 891 | \f |
8792be66 | 892 | /* Value is a version number of byte compiled code if the file |
c73bd236 | 893 | associated with file descriptor FD is a compiled Lisp file that's |
8792be66 KH |
894 | safe to load. Only files compiled with Emacs are safe to load. |
895 | Files compiled with XEmacs can lead to a crash in Fbyte_code | |
896 | because of an incompatible change in the byte compiler. */ | |
da84f340 GM |
897 | |
898 | static int | |
971de7fb | 899 | safe_to_load_p (int fd) |
da84f340 GM |
900 | { |
901 | char buf[512]; | |
902 | int nbytes, i; | |
903 | int safe_p = 1; | |
8f924df7 | 904 | int version = 1; |
da84f340 GM |
905 | |
906 | /* Read the first few bytes from the file, and look for a line | |
907 | specifying the byte compiler version used. */ | |
908 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
909 | if (nbytes > 0) | |
910 | { | |
911 | buf[nbytes] = '\0'; | |
912 | ||
913 | /* Skip to the next newline, skipping over the initial `ELC' | |
1da3b9e4 | 914 | with NUL bytes following it, but note the version. */ |
da84f340 | 915 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) |
1da3b9e4 | 916 | if (i == 4) |
8792be66 | 917 | version = buf[i]; |
da84f340 | 918 | |
e6eb4e9e | 919 | if (i >= nbytes |
927f12da | 920 | || fast_c_string_match_ignore_case (Vbytecomp_version_regexp, |
da84f340 GM |
921 | buf + i) < 0) |
922 | safe_p = 0; | |
923 | } | |
1da3b9e4 DL |
924 | if (safe_p) |
925 | safe_p = version; | |
da84f340 GM |
926 | |
927 | lseek (fd, 0, SEEK_SET); | |
928 | return safe_p; | |
929 | } | |
930 | ||
931 | ||
7ee3bd7b GM |
932 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
933 | after loading a file successfully. */ | |
934 | ||
935 | static Lisp_Object | |
971de7fb | 936 | record_load_unwind (Lisp_Object old) |
7ee3bd7b GM |
937 | { |
938 | return Vloads_in_progress = old; | |
939 | } | |
940 | ||
164c8bfe RS |
941 | /* This handler function is used via internal_condition_case_1. */ |
942 | ||
943 | static Lisp_Object | |
971de7fb | 944 | load_error_handler (Lisp_Object data) |
164c8bfe RS |
945 | { |
946 | return Qnil; | |
947 | } | |
7ee3bd7b | 948 | |
1d064697 | 949 | static Lisp_Object |
971de7fb | 950 | load_warn_old_style_backquotes (Lisp_Object file) |
1d064697 SM |
951 | { |
952 | if (!NILP (Vold_style_backquotes)) | |
953 | { | |
b636b4c1 | 954 | Lisp_Object args[2]; |
18a4a65e | 955 | args[0] = build_string ("Loading `%s': old-style backquotes detected!"); |
1d064697 SM |
956 | args[1] = file; |
957 | Fmessage (2, args); | |
958 | } | |
959 | return Qnil; | |
960 | } | |
961 | ||
a7ca3326 | 962 | DEFUN ("get-load-suffixes", Fget_load_suffixes, Sget_load_suffixes, 0, 0, 0, |
971a4293 LT |
963 | doc: /* Return the suffixes that `load' should try if a suffix is \ |
964 | required. | |
965 | This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */) | |
5842a27b | 966 | (void) |
971a4293 LT |
967 | { |
968 | Lisp_Object lst = Qnil, suffixes = Vload_suffixes, suffix, ext; | |
969 | while (CONSP (suffixes)) | |
970 | { | |
971 | Lisp_Object exts = Vload_file_rep_suffixes; | |
972 | suffix = XCAR (suffixes); | |
973 | suffixes = XCDR (suffixes); | |
974 | while (CONSP (exts)) | |
975 | { | |
976 | ext = XCAR (exts); | |
977 | exts = XCDR (exts); | |
978 | lst = Fcons (concat2 (suffix, ext), lst); | |
979 | } | |
980 | } | |
981 | return Fnreverse (lst); | |
982 | } | |
983 | ||
a7ca3326 | 984 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
985 | doc: /* Execute a file of Lisp code named FILE. |
986 | First try FILE with `.elc' appended, then try with `.el', | |
971a4293 | 987 | then try FILE unmodified (the exact suffixes in the exact order are |
88852d45 | 988 | determined by `load-suffixes'). Environment variable references in |
971a4293 | 989 | FILE are replaced with their values by calling `substitute-in-file-name'. |
5de38842 | 990 | This function searches the directories in `load-path'. |
971a4293 | 991 | |
5de38842 | 992 | If optional second arg NOERROR is non-nil, |
971a4293 | 993 | report no error if FILE doesn't exist. |
5de38842 | 994 | Print messages at start and end of loading unless |
beb0b7f9 EZ |
995 | optional third arg NOMESSAGE is non-nil (but `force-load-messages' |
996 | overrides that). | |
5de38842 | 997 | If optional fourth arg NOSUFFIX is non-nil, don't try adding |
971a4293 | 998 | suffixes `.elc' or `.el' to the specified name FILE. |
5de38842 | 999 | If optional fifth arg MUST-SUFFIX is non-nil, insist on |
971a4293 LT |
1000 | the suffix `.elc' or `.el'; don't accept just FILE unless |
1001 | it ends in one of those suffixes or includes a directory name. | |
1002 | ||
1003 | If this function fails to find a file, it may look for different | |
1004 | representations of that file before trying another file. | |
1005 | It does so by adding the non-empty suffixes in `load-file-rep-suffixes' | |
1006 | to the file name. Emacs uses this feature mainly to find compressed | |
1007 | versions of files when Auto Compression mode is enabled. | |
1008 | ||
1009 | The exact suffixes that this function tries out, in the exact order, | |
1010 | are given by the value of the variable `load-file-rep-suffixes' if | |
1011 | NOSUFFIX is non-nil and by the return value of the function | |
1012 | `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and | |
1013 | MUST-SUFFIX are nil, this function first tries out the latter suffixes | |
1014 | and then the former. | |
0fc213e9 RS |
1015 | |
1016 | Loading a file records its definitions, and its `provide' and | |
1017 | `require' calls, in an element of `load-history' whose | |
1018 | car is the file name loaded. See `load-history'. | |
1019 | ||
c7926fe2 EZ |
1020 | While the file is in the process of being loaded, the variable |
1021 | `load-in-progress' is non-nil and the variable `load-file-name' | |
1022 | is bound to the file's name. | |
1023 | ||
971a4293 | 1024 | Return t if the file exists and loads successfully. */) |
5842a27b | 1025 | (Lisp_Object file, Lisp_Object noerror, Lisp_Object nomessage, Lisp_Object nosuffix, Lisp_Object must_suffix) |
078e7b4a JB |
1026 | { |
1027 | register FILE *stream; | |
1028 | register int fd = -1; | |
d311d28c | 1029 | ptrdiff_t count = SPECPDL_INDEX (); |
6bb6da3e AM |
1030 | struct gcpro gcpro1, gcpro2, gcpro3; |
1031 | Lisp_Object found, efound, hist_file_name; | |
04fc68e7 RS |
1032 | /* 1 means we printed the ".el is newer" message. */ |
1033 | int newer = 0; | |
1034 | /* 1 means we are loading a compiled file. */ | |
1035 | int compiled = 0; | |
c2225d00 | 1036 | Lisp_Object handler; |
456c67a4 | 1037 | int safe_p = 1; |
8ea90aa3 | 1038 | const char *fmode = "r"; |
6bb6da3e | 1039 | Lisp_Object tmp[2]; |
8792be66 KH |
1040 | int version; |
1041 | ||
317073d5 | 1042 | #ifdef DOS_NT |
229ba775 | 1043 | fmode = "rt"; |
317073d5 | 1044 | #endif /* DOS_NT */ |
078e7b4a | 1045 | |
b7826503 | 1046 | CHECK_STRING (file); |
078e7b4a | 1047 | |
c2225d00 | 1048 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
1049 | /* This shouldn't be necessary any more now that `openp' handles it right. |
1050 | handler = Ffind_file_name_handler (file, Qload); | |
1051 | if (!NILP (handler)) | |
1052 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 1053 | |
07a0bda3 RS |
1054 | /* Do this after the handler to avoid |
1055 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
1056 | (Below here, we care only whether they are nil or not.) |
1057 | The presence of this call is the result of a historical accident: | |
6bb6da3e | 1058 | it used to be in every file-operation and when it got removed |
e61b9b87 SM |
1059 | everywhere, it accidentally stayed here. Since then, enough people |
1060 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
1061 | that it seemed risky to remove. */ | |
164c8bfe RS |
1062 | if (! NILP (noerror)) |
1063 | { | |
1064 | file = internal_condition_case_1 (Fsubstitute_in_file_name, file, | |
1065 | Qt, load_error_handler); | |
1066 | if (NILP (file)) | |
1067 | return Qnil; | |
1068 | } | |
1069 | else | |
1070 | file = Fsubstitute_in_file_name (file); | |
177c0ea7 | 1071 | |
07a0bda3 | 1072 | |
078e7b4a JB |
1073 | /* Avoid weird lossage with null string as arg, |
1074 | since it would try to load a directory as a Lisp file */ | |
82cb60d3 | 1075 | if (SBYTES (file) > 0) |
078e7b4a | 1076 | { |
82cb60d3 | 1077 | ptrdiff_t size = SBYTES (file); |
211f7dcd | 1078 | |
0fc213e9 RS |
1079 | found = Qnil; |
1080 | GCPRO2 (file, found); | |
211f7dcd RS |
1081 | |
1082 | if (! NILP (must_suffix)) | |
1083 | { | |
1084 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
1085 | if (size > 3 | |
42a5b22f | 1086 | && !strcmp (SSDATA (file) + size - 3, ".el")) |
211f7dcd RS |
1087 | must_suffix = Qnil; |
1088 | else if (size > 4 | |
42a5b22f | 1089 | && !strcmp (SSDATA (file) + size - 4, ".elc")) |
211f7dcd RS |
1090 | must_suffix = Qnil; |
1091 | /* Don't insist on adding a suffix | |
1092 | if the argument includes a directory name. */ | |
1093 | else if (! NILP (Ffile_name_directory (file))) | |
1094 | must_suffix = Qnil; | |
1095 | } | |
1096 | ||
f0a50954 | 1097 | fd = openp (Vload_path, file, |
e61b9b87 | 1098 | (!NILP (nosuffix) ? Qnil |
971a4293 LT |
1099 | : !NILP (must_suffix) ? Fget_load_suffixes () |
1100 | : Fappend (2, (tmp[0] = Fget_load_suffixes (), | |
1101 | tmp[1] = Vload_file_rep_suffixes, | |
e61b9b87 | 1102 | tmp))), |
86d00812 | 1103 | &found, Qnil); |
5a6e5452 | 1104 | UNGCPRO; |
078e7b4a JB |
1105 | } |
1106 | ||
96dc0f4e | 1107 | if (fd == -1) |
078e7b4a | 1108 | { |
265a9e55 | 1109 | if (NILP (noerror)) |
336d4a9c KS |
1110 | xsignal2 (Qfile_error, build_string ("Cannot open load file"), file); |
1111 | return Qnil; | |
078e7b4a JB |
1112 | } |
1113 | ||
ba0d1195 | 1114 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
1115 | if (EQ (Qt, Vuser_init_file)) |
1116 | Vuser_init_file = found; | |
1117 | ||
96dc0f4e MB |
1118 | /* If FD is -2, that means openp found a magic file. */ |
1119 | if (fd == -2) | |
74549846 | 1120 | { |
5e24a1f7 KH |
1121 | if (NILP (Fequal (found, file))) |
1122 | /* If FOUND is a different file name from FILE, | |
1123 | find its handler even if we have already inhibited | |
1124 | the `load' operation on FILE. */ | |
1125 | handler = Ffind_file_name_handler (found, Qt); | |
1126 | else | |
1127 | handler = Ffind_file_name_handler (found, Qload); | |
1128 | if (! NILP (handler)) | |
1129 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
35774242 EZ |
1130 | #ifdef DOS_NT |
1131 | /* Tramp has to deal with semi-broken packages that prepend | |
1132 | drive letters to remote files. For that reason, Tramp | |
1133 | catches file operations that test for file existence, which | |
1134 | makes openp think X:/foo.elc files are remote. However, | |
1135 | Tramp does not catch `load' operations for such files, so we | |
1136 | end up with a nil as the `load' handler above. If we would | |
1137 | continue with fd = -2, we will behave wrongly, and in | |
1138 | particular try reading a .elc file in the "rt" mode instead | |
1139 | of "rb". See bug #9311 for the results. To work around | |
1140 | this, we try to open the file locally, and go with that if it | |
1141 | succeeds. */ | |
1142 | fd = emacs_open (SSDATA (ENCODE_FILE (found)), O_RDONLY, 0); | |
1143 | if (fd == -1) | |
1144 | fd = -2; | |
1145 | #endif | |
74549846 RS |
1146 | } |
1147 | ||
550a625e GM |
1148 | /* Check if we're stuck in a recursive load cycle. |
1149 | ||
1150 | 2000-09-21: It's not possible to just check for the file loaded | |
1151 | being a member of Vloads_in_progress. This fails because of the | |
1152 | way the byte compiler currently works; `provide's are not | |
9d438325 | 1153 | evaluated, see font-lock.el/jit-lock.el as an example. This |
550a625e GM |
1154 | leads to a certain amount of ``normal'' recursion. |
1155 | ||
1156 | Also, just loading a file recursively is not always an error in | |
1157 | the general case; the second load may do something different. */ | |
3ba6fd9a | 1158 | { |
0902fe45 | 1159 | int load_count = 0; |
3ba6fd9a RS |
1160 | Lisp_Object tem; |
1161 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
0902fe45 | 1162 | if (!NILP (Fequal (found, XCAR (tem))) && (++load_count > 3)) |
8fc45744 JB |
1163 | { |
1164 | if (fd >= 0) | |
1165 | emacs_close (fd); | |
1166 | signal_error ("Recursive load", Fcons (found, Vloads_in_progress)); | |
1167 | } | |
3ba6fd9a RS |
1168 | record_unwind_protect (record_load_unwind, Vloads_in_progress); |
1169 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
1170 | } | |
7ee3bd7b | 1171 | |
b9598260 SM |
1172 | /* All loads are by default dynamic, unless the file itself specifies |
1173 | otherwise using a file-variable in the first line. This is bound here | |
1174 | so that it takes effect whether or not we use | |
1175 | Vload_source_file_function. */ | |
1176 | specbind (Qlexical_binding, Qnil); | |
1177 | ||
6bb6da3e AM |
1178 | /* Get the name for load-history. */ |
1179 | hist_file_name = (! NILP (Vpurify_flag) | |
1180 | ? Fconcat (2, (tmp[0] = Ffile_name_directory (file), | |
1181 | tmp[1] = Ffile_name_nondirectory (found), | |
1182 | tmp)) | |
1183 | : found) ; | |
1184 | ||
8792be66 | 1185 | version = -1; |
1bb9a689 | 1186 | |
88852d45 | 1187 | /* Check for the presence of old-style quotes and warn about them. */ |
1d064697 SM |
1188 | specbind (Qold_style_backquotes, Qnil); |
1189 | record_unwind_protect (load_warn_old_style_backquotes, file); | |
1190 | ||
72af86bd | 1191 | if (!memcmp (SDATA (found) + SBYTES (found) - 4, ".elc", 4) |
74327f7a | 1192 | || (fd >= 0 && (version = safe_to_load_p (fd)) > 0)) |
96dc0f4e MB |
1193 | /* Load .elc files directly, but not when they are |
1194 | remote and have no handler! */ | |
078e7b4a | 1195 | { |
96dc0f4e | 1196 | if (fd != -2) |
da84f340 | 1197 | { |
96dc0f4e MB |
1198 | struct stat s1, s2; |
1199 | int result; | |
da84f340 | 1200 | |
6bb6da3e | 1201 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1202 | |
8792be66 KH |
1203 | if (version < 0 |
1204 | && ! (version = safe_to_load_p (fd))) | |
96dc0f4e MB |
1205 | { |
1206 | safe_p = 0; | |
1207 | if (!load_dangerous_libraries) | |
e63304b7 DL |
1208 | { |
1209 | if (fd >= 0) | |
1210 | emacs_close (fd); | |
1211 | error ("File `%s' was not compiled in Emacs", | |
1212 | SDATA (found)); | |
1213 | } | |
beb0b7f9 | 1214 | else if (!NILP (nomessage) && !force_load_messages) |
96dc0f4e MB |
1215 | message_with_string ("File `%s' not compiled in Emacs", found, 1); |
1216 | } | |
04fc68e7 | 1217 | |
96dc0f4e MB |
1218 | compiled = 1; |
1219 | ||
eb191db2 EZ |
1220 | efound = ENCODE_FILE (found); |
1221 | ||
26fbf20b | 1222 | #ifdef DOS_NT |
96dc0f4e | 1223 | fmode = "rb"; |
26fbf20b | 1224 | #endif /* DOS_NT */ |
e5533da6 PE |
1225 | result = stat (SSDATA (efound), &s1); |
1226 | if (result == 0) | |
1227 | { | |
1228 | SSET (efound, SBYTES (efound) - 1, 0); | |
1229 | result = stat (SSDATA (efound), &s2); | |
1230 | SSET (efound, SBYTES (efound) - 1, 'c'); | |
1231 | } | |
eb191db2 | 1232 | |
d37ca623 | 1233 | if (result == 0 && s1.st_mtime < s2.st_mtime) |
96dc0f4e MB |
1234 | { |
1235 | /* Make the progress messages mention that source is newer. */ | |
1236 | newer = 1; | |
04fc68e7 | 1237 | |
96dc0f4e | 1238 | /* If we won't print another message, mention this anyway. */ |
beb0b7f9 | 1239 | if (!NILP (nomessage) && !force_load_messages) |
714d8c39 | 1240 | { |
0fc213e9 RS |
1241 | Lisp_Object msg_file; |
1242 | msg_file = Fsubstring (found, make_number (0), make_number (-1)); | |
714d8c39 | 1243 | message_with_string ("Source file `%s' newer than byte-compiled file", |
0fc213e9 | 1244 | msg_file, 1); |
714d8c39 | 1245 | } |
96dc0f4e | 1246 | } |
0fc213e9 | 1247 | UNGCPRO; |
51ac6f83 | 1248 | } |
078e7b4a | 1249 | } |
fe0e03f3 KH |
1250 | else |
1251 | { | |
1252 | /* We are loading a source file (*.el). */ | |
1253 | if (!NILP (Vload_source_file_function)) | |
1254 | { | |
7ee3bd7b | 1255 | Lisp_Object val; |
96dc0f4e MB |
1256 | |
1257 | if (fd >= 0) | |
68c45bf0 | 1258 | emacs_close (fd); |
6bb6da3e | 1259 | val = call4 (Vload_source_file_function, found, hist_file_name, |
7ee3bd7b | 1260 | NILP (noerror) ? Qnil : Qt, |
beb0b7f9 | 1261 | (NILP (nomessage) || force_load_messages) ? Qnil : Qt); |
7ee3bd7b | 1262 | return unbind_to (count, val); |
fe0e03f3 KH |
1263 | } |
1264 | } | |
078e7b4a | 1265 | |
6bb6da3e | 1266 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1267 | |
229ba775 | 1268 | #ifdef WINDOWSNT |
eb191db2 | 1269 | efound = ENCODE_FILE (found); |
35774242 EZ |
1270 | /* If we somehow got here with fd == -2, meaning the file is deemed |
1271 | to be remote, don't even try to reopen the file locally; just | |
1272 | force a failure instead. */ | |
1273 | if (fd >= 0) | |
1274 | { | |
1275 | emacs_close (fd); | |
1276 | stream = fopen (SSDATA (efound), fmode); | |
1277 | } | |
1278 | else | |
1279 | stream = NULL; | |
229ba775 EZ |
1280 | #else /* not WINDOWSNT */ |
1281 | stream = fdopen (fd, fmode); | |
1282 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
1283 | if (stream == 0) |
1284 | { | |
68c45bf0 | 1285 | emacs_close (fd); |
d5db4077 | 1286 | error ("Failure to create stdio stream for %s", SDATA (file)); |
078e7b4a JB |
1287 | } |
1288 | ||
4b104c41 | 1289 | if (! NILP (Vpurify_flag)) |
5e617bc2 | 1290 | Vpreloaded_file_list = Fcons (Fpurecopy (file), Vpreloaded_file_list); |
4b104c41 | 1291 | |
beb0b7f9 | 1292 | if (NILP (nomessage) || force_load_messages) |
04fc68e7 | 1293 | { |
da84f340 GM |
1294 | if (!safe_p) |
1295 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
1296 | file, 1); | |
1297 | else if (!compiled) | |
e28552a4 | 1298 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 1299 | else if (newer) |
e28552a4 RS |
1300 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
1301 | file, 1); | |
db5cae4b | 1302 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1303 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 1304 | } |
078e7b4a | 1305 | |
c04d9e70 | 1306 | record_unwind_protect (load_unwind, make_save_value (stream, 0)); |
d2c6be7f | 1307 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 1308 | specbind (Qload_file_name, found); |
74549846 | 1309 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
1310 | load_descriptor_list |
1311 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
2baf5e76 | 1312 | specbind (Qload_in_progress, Qt); |
b9598260 SM |
1313 | |
1314 | instream = stream; | |
1315 | if (lisp_file_lexically_bound_p (Qget_file_char)) | |
1316 | Fset (Qlexical_binding, Qt); | |
1317 | ||
ab2a47e1 | 1318 | if (! version || version >= 22) |
b883cdb2 | 1319 | readevalloop (Qget_file_char, stream, hist_file_name, |
defb1411 | 1320 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 KH |
1321 | else |
1322 | { | |
1323 | /* We can't handle a file which was compiled with | |
1324 | byte-compile-dynamic by older version of Emacs. */ | |
1325 | specbind (Qload_force_doc_strings, Qt); | |
defb1411 | 1326 | readevalloop (Qget_emacs_mule_file_char, stream, hist_file_name, |
768d4533 | 1327 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 | 1328 | } |
078e7b4a JB |
1329 | unbind_to (count, Qnil); |
1330 | ||
6bb6da3e | 1331 | /* Run any eval-after-load forms for this file */ |
428b13d6 | 1332 | if (!NILP (Ffboundp (Qdo_after_load_evaluation))) |
6bb6da3e AM |
1333 | call1 (Qdo_after_load_evaluation, hist_file_name) ; |
1334 | ||
078e7b4a JB |
1335 | UNGCPRO; |
1336 | ||
97dead2d | 1337 | xfree (saved_doc_string); |
b2a30870 RS |
1338 | saved_doc_string = 0; |
1339 | saved_doc_string_size = 0; | |
1340 | ||
70fdbb46 | 1341 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
1342 | prev_saved_doc_string = 0; |
1343 | prev_saved_doc_string_size = 0; | |
1344 | ||
beb0b7f9 | 1345 | if (!noninteractive && (NILP (nomessage) || force_load_messages)) |
04fc68e7 | 1346 | { |
da84f340 GM |
1347 | if (!safe_p) |
1348 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
1349 | file, 1); | |
1350 | else if (!compiled) | |
e28552a4 | 1351 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 1352 | else if (newer) |
e28552a4 RS |
1353 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
1354 | file, 1); | |
db5cae4b | 1355 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1356 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 1357 | } |
7ee3bd7b | 1358 | |
078e7b4a JB |
1359 | return Qt; |
1360 | } | |
1361 | ||
1362 | static Lisp_Object | |
971de7fb | 1363 | load_unwind (Lisp_Object arg) /* used as unwind-protect function in load */ |
078e7b4a | 1364 | { |
ebfe97a2 KS |
1365 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
1366 | if (stream != NULL) | |
66cd0949 YM |
1367 | { |
1368 | BLOCK_INPUT; | |
1369 | fclose (stream); | |
1370 | UNBLOCK_INPUT; | |
1371 | } | |
078e7b4a JB |
1372 | return Qnil; |
1373 | } | |
1374 | ||
d2c6be7f | 1375 | static Lisp_Object |
971de7fb | 1376 | load_descriptor_unwind (Lisp_Object oldlist) |
d2c6be7f RS |
1377 | { |
1378 | load_descriptor_list = oldlist; | |
838abf56 | 1379 | return Qnil; |
d2c6be7f RS |
1380 | } |
1381 | ||
1382 | /* Close all descriptors in use for Floads. | |
1383 | This is used when starting a subprocess. */ | |
1384 | ||
1385 | void | |
971de7fb | 1386 | close_load_descs (void) |
d2c6be7f | 1387 | { |
f3849f25 | 1388 | #ifndef WINDOWSNT |
d2c6be7f | 1389 | Lisp_Object tail; |
9beb8baa | 1390 | for (tail = load_descriptor_list; CONSP (tail); tail = XCDR (tail)) |
68c45bf0 | 1391 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 1392 | #endif |
d2c6be7f | 1393 | } |
078e7b4a JB |
1394 | \f |
1395 | static int | |
971de7fb | 1396 | complete_filename_p (Lisp_Object pathname) |
078e7b4a | 1397 | { |
4b2dd274 | 1398 | register const unsigned char *s = SDATA (pathname); |
317073d5 | 1399 | return (IS_DIRECTORY_SEP (s[0]) |
d5db4077 | 1400 | || (SCHARS (pathname) > 2 |
7c2fb837 | 1401 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2]))); |
078e7b4a JB |
1402 | } |
1403 | ||
86d00812 SM |
1404 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
1405 | doc: /* Search for FILENAME through PATH. | |
57a131fb | 1406 | Returns the file's name in absolute form, or nil if not found. |
86d00812 SM |
1407 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
1408 | file name when searching. | |
1409 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
1410 | PREDICATE can also be an integer to pass to the access(2) function, | |
aa56f361 SM |
1411 | in which case file-name-handlers are ignored. |
1412 | This function will normally skip directories, so if you want it to find | |
1413 | directories, make sure the PREDICATE function returns `dir-ok' for them. */) | |
5842a27b | 1414 | (Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate) |
86d00812 SM |
1415 | { |
1416 | Lisp_Object file; | |
1417 | int fd = openp (path, filename, suffixes, &file, predicate); | |
1418 | if (NILP (predicate) && fd > 0) | |
1419 | close (fd); | |
1420 | return file; | |
1421 | } | |
1422 | ||
aa56f361 | 1423 | static Lisp_Object Qdir_ok; |
86d00812 | 1424 | |
078e7b4a JB |
1425 | /* Search for a file whose name is STR, looking in directories |
1426 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
1427 | On success, returns a file descriptor. On failure, returns -1. |
1428 | ||
e61b9b87 | 1429 | SUFFIXES is a list of strings containing possible suffixes. |
e0f24100 | 1430 | The empty suffix is automatically added if the list is empty. |
e61b9b87 | 1431 | |
86d00812 SM |
1432 | PREDICATE non-nil means don't open the files, |
1433 | just look for one that satisfies the predicate. In this case, | |
1434 | returns 1 on success. The predicate can be a lisp function or | |
1435 | an integer to pass to `access' (in which case file-name-handlers | |
1436 | are ignored). | |
078e7b4a JB |
1437 | |
1438 | If STOREPTR is nonzero, it points to a slot where the name of | |
1439 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
1440 | nil is stored there on failure. |
1441 | ||
96dc0f4e | 1442 | If the file we find is remote, return -2 |
86d00812 | 1443 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
1444 | |
1445 | int | |
971de7fb | 1446 | openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, Lisp_Object *storeptr, Lisp_Object predicate) |
078e7b4a JB |
1447 | { |
1448 | register int fd; | |
d311d28c | 1449 | ptrdiff_t fn_size = 100; |
078e7b4a JB |
1450 | char buf[100]; |
1451 | register char *fn = buf; | |
1452 | int absolute = 0; | |
d311d28c | 1453 | ptrdiff_t want_length; |
74549846 | 1454 | Lisp_Object filename; |
078e7b4a | 1455 | struct stat st; |
eb191db2 EZ |
1456 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
1457 | Lisp_Object string, tail, encoded_fn; | |
d311d28c | 1458 | ptrdiff_t max_suffix_len = 0; |
e61b9b87 | 1459 | |
6f8eafd1 SM |
1460 | CHECK_STRING (str); |
1461 | ||
e61b9b87 SM |
1462 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) |
1463 | { | |
f5df591a | 1464 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1465 | max_suffix_len = max (max_suffix_len, |
d5db4077 | 1466 | SBYTES (XCAR (tail))); |
e61b9b87 | 1467 | } |
078e7b4a | 1468 | |
8b9d426a | 1469 | string = filename = encoded_fn = Qnil; |
eb191db2 EZ |
1470 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1471 | ||
078e7b4a JB |
1472 | if (storeptr) |
1473 | *storeptr = Qnil; | |
1474 | ||
1475 | if (complete_filename_p (str)) | |
1476 | absolute = 1; | |
1477 | ||
e61b9b87 | 1478 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1479 | { |
e61b9b87 | 1480 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a JB |
1481 | if (!complete_filename_p (filename)) |
1482 | /* If there are non-absolute elts in PATH (eg ".") */ | |
1483 | /* Of course, this could conceivably lose if luser sets | |
1484 | default-directory to be something non-absolute... */ | |
1485 | { | |
4b4deea2 | 1486 | filename = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
078e7b4a JB |
1487 | if (!complete_filename_p (filename)) |
1488 | /* Give up on this path element! */ | |
1489 | continue; | |
1490 | } | |
1491 | ||
640ee02d | 1492 | /* Calculate maximum length of any filename made from |
078e7b4a | 1493 | this path element/specified file name and any possible suffix. */ |
640ee02d PE |
1494 | want_length = max_suffix_len + SBYTES (filename); |
1495 | if (fn_size <= want_length) | |
1496 | fn = (char *) alloca (fn_size = 100 + want_length); | |
078e7b4a | 1497 | |
078e7b4a | 1498 | /* Loop over suffixes. */ |
a74d1c97 | 1499 | for (tail = NILP (suffixes) ? Fcons (empty_unibyte_string, Qnil) : suffixes; |
e61b9b87 | 1500 | CONSP (tail); tail = XCDR (tail)) |
078e7b4a | 1501 | { |
82cb60d3 | 1502 | ptrdiff_t lsuffix = SBYTES (XCAR (tail)); |
74549846 | 1503 | Lisp_Object handler; |
eb191db2 | 1504 | int exists; |
078e7b4a | 1505 | |
c49afcd7 RS |
1506 | /* Concatenate path element/specified name with the suffix. |
1507 | If the directory starts with /:, remove that. */ | |
d5db4077 KR |
1508 | if (SCHARS (filename) > 2 |
1509 | && SREF (filename, 0) == '/' | |
1510 | && SREF (filename, 1) == ':') | |
c49afcd7 | 1511 | { |
42a5b22f | 1512 | strncpy (fn, SSDATA (filename) + 2, |
d5db4077 KR |
1513 | SBYTES (filename) - 2); |
1514 | fn[SBYTES (filename) - 2] = 0; | |
c49afcd7 RS |
1515 | } |
1516 | else | |
1517 | { | |
42a5b22f | 1518 | strncpy (fn, SSDATA (filename), |
d5db4077 KR |
1519 | SBYTES (filename)); |
1520 | fn[SBYTES (filename)] = 0; | |
c49afcd7 RS |
1521 | } |
1522 | ||
078e7b4a | 1523 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
42a5b22f | 1524 | strncat (fn, SSDATA (XCAR (tail)), lsuffix); |
eb191db2 | 1525 | |
74549846 | 1526 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1527 | /* We used to only check for handlers on non-absolute file names: |
1528 | if (absolute) | |
1529 | handler = Qnil; | |
1530 | else | |
1531 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1532 | It's not clear why that was the case and it breaks things like | |
1533 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
eb191db2 | 1534 | string = build_string (fn); |
4773b8ca | 1535 | handler = Ffind_file_name_handler (string, Qfile_exists_p); |
86d00812 SM |
1536 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1537 | { | |
1538 | if (NILP (predicate)) | |
1539 | exists = !NILP (Ffile_readable_p (string)); | |
1540 | else | |
aa56f361 SM |
1541 | { |
1542 | Lisp_Object tmp = call1 (predicate, string); | |
1543 | exists = !NILP (tmp) | |
1544 | && (EQ (tmp, Qdir_ok) | |
aa0f73d1 | 1545 | || NILP (Ffile_directory_p (string))); |
aa56f361 | 1546 | } |
74549846 RS |
1547 | |
1548 | if (exists) | |
078e7b4a JB |
1549 | { |
1550 | /* We succeeded; return this descriptor and filename. */ | |
1551 | if (storeptr) | |
eb191db2 | 1552 | *storeptr = string; |
5ef2a3c0 | 1553 | UNGCPRO; |
96dc0f4e | 1554 | return -2; |
74549846 RS |
1555 | } |
1556 | } | |
1557 | else | |
1558 | { | |
4b2dd274 | 1559 | const char *pfn; |
eb191db2 EZ |
1560 | |
1561 | encoded_fn = ENCODE_FILE (string); | |
42a5b22f | 1562 | pfn = SSDATA (encoded_fn); |
f68c809d | 1563 | exists = (stat (pfn, &st) == 0 && ! S_ISDIR (st.st_mode)); |
74549846 RS |
1564 | if (exists) |
1565 | { | |
1566 | /* Check that we can access or open it. */ | |
86d00812 | 1567 | if (NATNUMP (predicate)) |
d311d28c PE |
1568 | fd = (((XFASTINT (predicate) & ~INT_MAX) == 0 |
1569 | && access (pfn, XFASTINT (predicate)) == 0) | |
1570 | ? 1 : -1); | |
74549846 | 1571 | else |
eb191db2 | 1572 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1573 | |
1574 | if (fd >= 0) | |
1575 | { | |
1576 | /* We succeeded; return this descriptor and filename. */ | |
1577 | if (storeptr) | |
eb191db2 | 1578 | *storeptr = string; |
74549846 RS |
1579 | UNGCPRO; |
1580 | return fd; | |
1581 | } | |
078e7b4a JB |
1582 | } |
1583 | } | |
078e7b4a | 1584 | } |
5a6e5452 | 1585 | if (absolute) |
5ef2a3c0 | 1586 | break; |
078e7b4a JB |
1587 | } |
1588 | ||
5ef2a3c0 KH |
1589 | UNGCPRO; |
1590 | return -1; | |
078e7b4a JB |
1591 | } |
1592 | ||
1593 | \f | |
ae321d28 RS |
1594 | /* Merge the list we've accumulated of globals from the current input source |
1595 | into the load_history variable. The details depend on whether | |
b502a9a1 RS |
1596 | the source has an associated file name or not. |
1597 | ||
1598 | FILENAME is the file name that we are loading from. | |
1599 | ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */ | |
ae321d28 RS |
1600 | |
1601 | static void | |
971de7fb | 1602 | build_load_history (Lisp_Object filename, int entire) |
ae321d28 RS |
1603 | { |
1604 | register Lisp_Object tail, prev, newelt; | |
1605 | register Lisp_Object tem, tem2; | |
b502a9a1 | 1606 | register int foundit = 0; |
ae321d28 RS |
1607 | |
1608 | tail = Vload_history; | |
1609 | prev = Qnil; | |
b502a9a1 | 1610 | |
86d00812 | 1611 | while (CONSP (tail)) |
ae321d28 | 1612 | { |
86d00812 | 1613 | tem = XCAR (tail); |
ae321d28 RS |
1614 | |
1615 | /* Find the feature's previous assoc list... */ | |
b502a9a1 | 1616 | if (!NILP (Fequal (filename, Fcar (tem)))) |
ae321d28 RS |
1617 | { |
1618 | foundit = 1; | |
1619 | ||
b502a9a1 RS |
1620 | /* If we're loading the entire file, remove old data. */ |
1621 | if (entire) | |
86d00812 | 1622 | { |
ae321d28 | 1623 | if (NILP (prev)) |
86d00812 | 1624 | Vload_history = XCDR (tail); |
ae321d28 | 1625 | else |
86d00812 | 1626 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1627 | } |
1628 | ||
1629 | /* Otherwise, cons on new symbols that are not already members. */ | |
1630 | else | |
1631 | { | |
1632 | tem2 = Vcurrent_load_list; | |
1633 | ||
1634 | while (CONSP (tem2)) | |
1635 | { | |
86d00812 | 1636 | newelt = XCAR (tem2); |
ae321d28 | 1637 | |
d642e4f9 | 1638 | if (NILP (Fmember (newelt, tem))) |
86d00812 SM |
1639 | Fsetcar (tail, Fcons (XCAR (tem), |
1640 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1641 | |
86d00812 | 1642 | tem2 = XCDR (tem2); |
ae321d28 RS |
1643 | QUIT; |
1644 | } | |
1645 | } | |
1646 | } | |
1647 | else | |
1648 | prev = tail; | |
86d00812 | 1649 | tail = XCDR (tail); |
ae321d28 RS |
1650 | QUIT; |
1651 | } | |
1652 | ||
b502a9a1 RS |
1653 | /* If we're loading an entire file, cons the new assoc onto the |
1654 | front of load-history, the most-recently-loaded position. Also | |
1655 | do this if we didn't find an existing member for the file. */ | |
1656 | if (entire || !foundit) | |
8a1f1537 RS |
1657 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), |
1658 | Vload_history); | |
ae321d28 RS |
1659 | } |
1660 | ||
7d383292 | 1661 | static Lisp_Object |
971de7fb | 1662 | unreadpure (Lisp_Object junk) /* Used as unwind-protect function in readevalloop */ |
078e7b4a JB |
1663 | { |
1664 | read_pure = 0; | |
1665 | return Qnil; | |
1666 | } | |
1667 | ||
94e554db | 1668 | static Lisp_Object |
971de7fb | 1669 | readevalloop_1 (Lisp_Object old) |
94e554db RS |
1670 | { |
1671 | load_convert_to_unibyte = ! NILP (old); | |
1672 | return Qnil; | |
1673 | } | |
1674 | ||
9c97398c GM |
1675 | /* Signal an `end-of-file' error, if possible with file name |
1676 | information. */ | |
1677 | ||
1678 | static void | |
971de7fb | 1679 | end_of_file_error (void) |
9c97398c | 1680 | { |
9c97398c | 1681 | if (STRINGP (Vload_file_name)) |
336d4a9c | 1682 | xsignal1 (Qend_of_file, Vload_file_name); |
9c97398c | 1683 | |
336d4a9c | 1684 | xsignal0 (Qend_of_file); |
9c97398c GM |
1685 | } |
1686 | ||
94e554db | 1687 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af | 1688 | for this invocation. |
4c03c46d | 1689 | READFUN, if non-nil, is used instead of `read'. |
1ed7b9ae RS |
1690 | |
1691 | START, END specify region to read in current buffer (from eval-region). | |
1692 | If the input is not from a buffer, they must be nil. */ | |
94e554db | 1693 | |
078e7b4a | 1694 | static void |
dd4c5104 DN |
1695 | readevalloop (Lisp_Object readcharfun, |
1696 | FILE *stream, | |
1697 | Lisp_Object sourcename, | |
dd4c5104 DN |
1698 | int printflag, |
1699 | Lisp_Object unibyte, Lisp_Object readfun, | |
1700 | Lisp_Object start, Lisp_Object end) | |
078e7b4a JB |
1701 | { |
1702 | register int c; | |
1703 | register Lisp_Object val; | |
d311d28c | 1704 | ptrdiff_t count = SPECPDL_INDEX (); |
0a37f512 | 1705 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
49cf7ff4 | 1706 | struct buffer *b = 0; |
f38952fe | 1707 | int continue_reading_p; |
b9598260 | 1708 | Lisp_Object lex_bound; |
d11db2c8 RS |
1709 | /* Nonzero if reading an entire buffer. */ |
1710 | int whole_buffer = 0; | |
1711 | /* 1 on the first time around. */ | |
1712 | int first_sexp = 1; | |
1713 | ||
1714 | if (MARKERP (readcharfun)) | |
1715 | { | |
1716 | if (NILP (start)) | |
8878319c | 1717 | start = readcharfun; |
d11db2c8 | 1718 | } |
49cf7ff4 RS |
1719 | |
1720 | if (BUFFERP (readcharfun)) | |
1721 | b = XBUFFER (readcharfun); | |
1722 | else if (MARKERP (readcharfun)) | |
1723 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a | 1724 | |
1ed7b9ae RS |
1725 | /* We assume START is nil when input is not from a buffer. */ |
1726 | if (! NILP (start) && !b) | |
1727 | abort (); | |
1728 | ||
0a37f512 | 1729 | specbind (Qstandard_input, readcharfun); /* GCPROs readcharfun. */ |
8a1f1537 | 1730 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1731 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1732 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1733 | |
b9598260 SM |
1734 | /* If lexical binding is active (either because it was specified in |
1735 | the file's header, or via a buffer-local variable), create an empty | |
1736 | lexical environment, otherwise, turn off lexical binding. */ | |
1737 | lex_bound = find_symbol_value (Qlexical_binding); | |
f07a954e SM |
1738 | specbind (Qinternal_interpreter_environment, |
1739 | NILP (lex_bound) || EQ (lex_bound, Qunbound) | |
1740 | ? Qnil : Fcons (Qt, Qnil)); | |
b9598260 | 1741 | |
0a37f512 | 1742 | GCPRO4 (sourcename, readfun, start, end); |
ae321d28 | 1743 | |
6bb6da3e AM |
1744 | /* Try to ensure sourcename is a truename, except whilst preloading. */ |
1745 | if (NILP (Vpurify_flag) | |
91fe9496 SM |
1746 | && !NILP (sourcename) && !NILP (Ffile_name_absolute_p (sourcename)) |
1747 | && !NILP (Ffboundp (Qfile_truename))) | |
6bb6da3e AM |
1748 | sourcename = call1 (Qfile_truename, sourcename) ; |
1749 | ||
ae321d28 RS |
1750 | LOADHIST_ATTACH (sourcename); |
1751 | ||
f38952fe GM |
1752 | continue_reading_p = 1; |
1753 | while (continue_reading_p) | |
078e7b4a | 1754 | { |
d311d28c | 1755 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4c03c46d | 1756 | |
4b4deea2 | 1757 | if (b != 0 && NILP (BVAR (b, name))) |
49cf7ff4 RS |
1758 | error ("Reading from killed buffer"); |
1759 | ||
4c03c46d KS |
1760 | if (!NILP (start)) |
1761 | { | |
721b7d9e | 1762 | /* Switch to the buffer we are reading from. */ |
4c03c46d | 1763 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e RS |
1764 | set_buffer_internal (b); |
1765 | ||
1766 | /* Save point in it. */ | |
4c03c46d | 1767 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e | 1768 | /* Save ZV in it. */ |
4c03c46d | 1769 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
721b7d9e RS |
1770 | /* Those get unbound after we read one expression. */ |
1771 | ||
1772 | /* Set point and ZV around stuff to be read. */ | |
4c03c46d | 1773 | Fgoto_char (start); |
d11db2c8 RS |
1774 | if (!NILP (end)) |
1775 | Fnarrow_to_region (make_number (BEGV), end); | |
1776 | ||
1777 | /* Just for cleanliness, convert END to a marker | |
1778 | if it is an integer. */ | |
1779 | if (INTEGERP (end)) | |
1780 | end = Fpoint_max_marker (); | |
4c03c46d KS |
1781 | } |
1782 | ||
d11db2c8 RS |
1783 | /* On the first cycle, we can easily test here |
1784 | whether we are reading the whole buffer. */ | |
1785 | if (b && first_sexp) | |
1786 | whole_buffer = (PT == BEG && ZV == Z); | |
1787 | ||
078e7b4a | 1788 | instream = stream; |
4c03c46d | 1789 | read_next: |
078e7b4a JB |
1790 | c = READCHAR; |
1791 | if (c == ';') | |
1792 | { | |
1793 | while ((c = READCHAR) != '\n' && c != -1); | |
4c03c46d KS |
1794 | goto read_next; |
1795 | } | |
1796 | if (c < 0) | |
1797 | { | |
1798 | unbind_to (count1, Qnil); | |
1799 | break; | |
078e7b4a | 1800 | } |
6069d957 RS |
1801 | |
1802 | /* Ignore whitespace here, so we can detect eof. */ | |
adef3de7 RS |
1803 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' |
1804 | || c == 0x8a0) /* NBSP */ | |
4c03c46d | 1805 | goto read_next; |
078e7b4a | 1806 | |
265a9e55 | 1807 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a JB |
1808 | { |
1809 | record_unwind_protect (unreadpure, Qnil); | |
1810 | val = read_list (-1, readcharfun); | |
078e7b4a JB |
1811 | } |
1812 | else | |
1813 | { | |
1814 | UNREAD (c); | |
4ad679f9 | 1815 | read_objects = Qnil; |
f38952fe GM |
1816 | if (!NILP (readfun)) |
1817 | { | |
1818 | val = call1 (readfun, readcharfun); | |
1819 | ||
1820 | /* If READCHARFUN has set point to ZV, we should | |
1821 | stop reading, even if the form read sets point | |
1822 | to a different value when evaluated. */ | |
1823 | if (BUFFERP (readcharfun)) | |
1824 | { | |
0902fe45 PE |
1825 | struct buffer *buf = XBUFFER (readcharfun); |
1826 | if (BUF_PT (buf) == BUF_ZV (buf)) | |
f38952fe GM |
1827 | continue_reading_p = 0; |
1828 | } | |
1829 | } | |
976350af | 1830 | else if (! NILP (Vload_read_function)) |
84a15045 | 1831 | val = call1 (Vload_read_function, readcharfun); |
976350af | 1832 | else |
abb13b09 | 1833 | val = read_internal_start (readcharfun, Qnil, Qnil); |
078e7b4a JB |
1834 | } |
1835 | ||
4c03c46d KS |
1836 | if (!NILP (start) && continue_reading_p) |
1837 | start = Fpoint_marker (); | |
d11db2c8 RS |
1838 | |
1839 | /* Restore saved point and BEGV. */ | |
4c03c46d KS |
1840 | unbind_to (count1, Qnil); |
1841 | ||
d11db2c8 | 1842 | /* Now eval what we just read. */ |
defb1411 | 1843 | val = eval_sub (val); |
f38952fe | 1844 | |
078e7b4a JB |
1845 | if (printflag) |
1846 | { | |
1847 | Vvalues = Fcons (val, Vvalues); | |
1848 | if (EQ (Vstandard_output, Qt)) | |
1849 | Fprin1 (val, Qnil); | |
1850 | else | |
1851 | Fprint (val, Qnil); | |
1852 | } | |
d11db2c8 RS |
1853 | |
1854 | first_sexp = 0; | |
078e7b4a JB |
1855 | } |
1856 | ||
8878319c | 1857 | build_load_history (sourcename, |
d11db2c8 | 1858 | stream || whole_buffer); |
b502a9a1 | 1859 | |
ae321d28 RS |
1860 | UNGCPRO; |
1861 | ||
078e7b4a JB |
1862 | unbind_to (count, Qnil); |
1863 | } | |
1864 | ||
1076254d | 1865 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 | 1866 | doc: /* Execute the current buffer as Lisp code. |
72097cd9 CY |
1867 | When called from a Lisp program (i.e., not interactively), this |
1868 | function accepts up to five optional arguments: | |
5de38842 PJ |
1869 | BUFFER is the buffer to evaluate (nil means use current buffer). |
1870 | PRINTFLAG controls printing of output: | |
72097cd9 CY |
1871 | A value of nil means discard it; anything else is stream for print. |
1872 | FILENAME specifies the file name to use for `load-history'. | |
1873 | UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this | |
1874 | invocation. | |
1875 | DO-ALLOW-PRINT, if non-nil, specifies that `print' and related | |
1876 | functions should work normally even if PRINTFLAG is nil. | |
5de38842 PJ |
1877 | |
1878 | This function preserves the position of point. */) | |
5842a27b | 1879 | (Lisp_Object buffer, Lisp_Object printflag, Lisp_Object filename, Lisp_Object unibyte, Lisp_Object do_allow_print) |
228d4b1c | 1880 | { |
d311d28c | 1881 | ptrdiff_t count = SPECPDL_INDEX (); |
228d4b1c JA |
1882 | Lisp_Object tem, buf; |
1883 | ||
9391b698 | 1884 | if (NILP (buffer)) |
228d4b1c JA |
1885 | buf = Fcurrent_buffer (); |
1886 | else | |
9391b698 | 1887 | buf = Fget_buffer (buffer); |
dfdb645c | 1888 | if (NILP (buf)) |
13febd85 | 1889 | error ("No such buffer"); |
228d4b1c | 1890 | |
1076254d | 1891 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1892 | tem = Qsymbolp; |
1893 | else | |
1894 | tem = printflag; | |
13febd85 RS |
1895 | |
1896 | if (NILP (filename)) | |
4b4deea2 | 1897 | filename = BVAR (XBUFFER (buf), filename); |
13febd85 | 1898 | |
3f39f996 | 1899 | specbind (Qeval_buffer_list, Fcons (buf, Veval_buffer_list)); |
228d4b1c JA |
1900 | specbind (Qstandard_output, tem); |
1901 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
bf1c0f27 | 1902 | BUF_TEMP_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); |
7200d79c | 1903 | specbind (Qlexical_binding, lisp_file_lexically_bound_p (buf) ? Qt : Qnil); |
defb1411 | 1904 | readevalloop (buf, 0, filename, |
4c03c46d | 1905 | !NILP (printflag), unibyte, Qnil, Qnil, Qnil); |
cb09ab7a | 1906 | unbind_to (count, Qnil); |
228d4b1c JA |
1907 | |
1908 | return Qnil; | |
1909 | } | |
1910 | ||
976350af | 1911 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1912 | doc: /* Execute the region as Lisp code. |
1913 | When called from programs, expects two arguments, | |
1914 | giving starting and ending indices in the current buffer | |
1915 | of the text to be executed. | |
1916 | Programs can pass third argument PRINTFLAG which controls output: | |
51d8b30e | 1917 | A value of nil means discard it; anything else is stream for printing it. |
5de38842 PJ |
1918 | Also the fourth argument READ-FUNCTION, if non-nil, is used |
1919 | instead of `read' to read each expression. It gets one argument | |
1920 | which is the input stream for reading characters. | |
1921 | ||
1922 | This function does not move point. */) | |
5842a27b | 1923 | (Lisp_Object start, Lisp_Object end, Lisp_Object printflag, Lisp_Object read_function) |
078e7b4a | 1924 | { |
f488fb65 | 1925 | /* FIXME: Do the eval-sexp-add-defvars danse! */ |
d311d28c | 1926 | ptrdiff_t count = SPECPDL_INDEX (); |
ae321d28 RS |
1927 | Lisp_Object tem, cbuf; |
1928 | ||
1929 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1930 | |
265a9e55 | 1931 | if (NILP (printflag)) |
078e7b4a JB |
1932 | tem = Qsymbolp; |
1933 | else | |
1934 | tem = printflag; | |
1935 | specbind (Qstandard_output, tem); | |
3f39f996 | 1936 | specbind (Qeval_buffer_list, Fcons (cbuf, Veval_buffer_list)); |
078e7b4a | 1937 | |
4c03c46d | 1938 | /* readevalloop calls functions which check the type of start and end. */ |
f619ad4c | 1939 | readevalloop (cbuf, 0, BVAR (XBUFFER (cbuf), filename), |
4c03c46d KS |
1940 | !NILP (printflag), Qnil, read_function, |
1941 | start, end); | |
078e7b4a JB |
1942 | |
1943 | return unbind_to (count, Qnil); | |
1944 | } | |
1945 | ||
078e7b4a | 1946 | \f |
a7ca3326 | 1947 | DEFUN ("read", Fread, Sread, 0, 1, 0, |
5de38842 PJ |
1948 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1949 | If STREAM is nil, use the value of `standard-input' (which see). | |
1950 | STREAM or the value of `standard-input' may be: | |
1951 | a buffer (read from point and advance it) | |
1952 | a marker (read from where it points and advance it) | |
1953 | a function (call it with no arguments for each character, | |
1954 | call it with a char as argument to push a char back) | |
1955 | a string (takes text from string, starting at the beginning) | |
1956 | t (read text line using minibuffer and use it, or read from | |
1957 | standard input in batch mode). */) | |
5842a27b | 1958 | (Lisp_Object stream) |
078e7b4a | 1959 | { |
5be02dff KH |
1960 | if (NILP (stream)) |
1961 | stream = Vstandard_input; | |
1962 | if (EQ (stream, Qt)) | |
1963 | stream = Qread_char; | |
5be02dff | 1964 | if (EQ (stream, Qread_char)) |
078e7b4a | 1965 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1966 | |
abb13b09 | 1967 | return read_internal_start (stream, Qnil, Qnil); |
078e7b4a JB |
1968 | } |
1969 | ||
a7ca3326 | 1970 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, |
5de38842 PJ |
1971 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1972 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
a4824228 LMI |
1973 | FINAL-STRING-INDEX is an integer giving the position of the next |
1974 | remaining chararacter in STRING. | |
5de38842 PJ |
1975 | START and END optionally delimit a substring of STRING from which to read; |
1976 | they default to 0 and (length STRING) respectively. */) | |
5842a27b | 1977 | (Lisp_Object string, Lisp_Object start, Lisp_Object end) |
078e7b4a | 1978 | { |
2530ceaf | 1979 | Lisp_Object ret; |
b7826503 | 1980 | CHECK_STRING (string); |
2530ceaf CW |
1981 | /* read_internal_start sets read_from_string_index. */ |
1982 | ret = read_internal_start (string, start, end); | |
5135ab39 | 1983 | return Fcons (ret, make_number (read_from_string_index)); |
abb13b09 | 1984 | } |
078e7b4a | 1985 | |
abb13b09 CW |
1986 | /* Function to set up the global context we need in toplevel read |
1987 | calls. */ | |
1988 | static Lisp_Object | |
971de7fb | 1989 | read_internal_start (Lisp_Object stream, Lisp_Object start, Lisp_Object end) |
b8ce688b | 1990 | /* start, end only used when stream is a string. */ |
abb13b09 CW |
1991 | { |
1992 | Lisp_Object retval; | |
078e7b4a | 1993 | |
abb13b09 | 1994 | readchar_count = 0; |
17634846 | 1995 | new_backquote_flag = 0; |
4ad679f9 | 1996 | read_objects = Qnil; |
abb13b09 CW |
1997 | if (EQ (Vread_with_symbol_positions, Qt) |
1998 | || EQ (Vread_with_symbol_positions, stream)) | |
1999 | Vread_symbol_positions_list = Qnil; | |
2000 | ||
8f924df7 KH |
2001 | if (STRINGP (stream) |
2002 | || ((CONSP (stream) && STRINGP (XCAR (stream))))) | |
abb13b09 | 2003 | { |
d311d28c | 2004 | ptrdiff_t startval, endval; |
8f924df7 | 2005 | Lisp_Object string; |
078e7b4a | 2006 | |
8f924df7 KH |
2007 | if (STRINGP (stream)) |
2008 | string = stream; | |
2009 | else | |
2010 | string = XCAR (stream); | |
078e7b4a | 2011 | |
abb13b09 | 2012 | if (NILP (end)) |
8f924df7 | 2013 | endval = SCHARS (string); |
abb13b09 CW |
2014 | else |
2015 | { | |
2016 | CHECK_NUMBER (end); | |
d311d28c | 2017 | if (! (0 <= XINT (end) && XINT (end) <= SCHARS (string))) |
8f924df7 | 2018 | args_out_of_range (string, end); |
d311d28c | 2019 | endval = XINT (end); |
abb13b09 | 2020 | } |
17634846 | 2021 | |
abb13b09 CW |
2022 | if (NILP (start)) |
2023 | startval = 0; | |
2024 | else | |
2025 | { | |
2026 | CHECK_NUMBER (start); | |
d311d28c | 2027 | if (! (0 <= XINT (start) && XINT (start) <= endval)) |
8f924df7 | 2028 | args_out_of_range (string, start); |
d311d28c | 2029 | startval = XINT (start); |
abb13b09 CW |
2030 | } |
2031 | read_from_string_index = startval; | |
8f924df7 | 2032 | read_from_string_index_byte = string_char_to_byte (string, startval); |
abb13b09 CW |
2033 | read_from_string_limit = endval; |
2034 | } | |
177c0ea7 | 2035 | |
abb13b09 CW |
2036 | retval = read0 (stream); |
2037 | if (EQ (Vread_with_symbol_positions, Qt) | |
2038 | || EQ (Vread_with_symbol_positions, stream)) | |
2039 | Vread_symbol_positions_list = Fnreverse (Vread_symbol_positions_list); | |
2040 | return retval; | |
078e7b4a JB |
2041 | } |
2042 | \f | |
336d4a9c KS |
2043 | |
2044 | /* Signal Qinvalid_read_syntax error. | |
2045 | S is error string of length N (if > 0) */ | |
2046 | ||
2047 | static void | |
e4d29b33 | 2048 | invalid_syntax (const char *s) |
336d4a9c | 2049 | { |
e4d29b33 | 2050 | xsignal1 (Qinvalid_read_syntax, build_string (s)); |
336d4a9c KS |
2051 | } |
2052 | ||
2053 | ||
6428369f KH |
2054 | /* Use this for recursive reads, in contexts where internal tokens |
2055 | are not allowed. */ | |
e28552a4 | 2056 | |
078e7b4a | 2057 | static Lisp_Object |
971de7fb | 2058 | read0 (Lisp_Object readcharfun) |
078e7b4a JB |
2059 | { |
2060 | register Lisp_Object val; | |
e28552a4 | 2061 | int c; |
078e7b4a | 2062 | |
17634846 | 2063 | val = read1 (readcharfun, &c, 0); |
336d4a9c KS |
2064 | if (!c) |
2065 | return val; | |
078e7b4a | 2066 | |
336d4a9c KS |
2067 | xsignal1 (Qinvalid_read_syntax, |
2068 | Fmake_string (make_number (1), make_number (c))); | |
078e7b4a JB |
2069 | } |
2070 | \f | |
82cb60d3 | 2071 | static ptrdiff_t read_buffer_size; |
078e7b4a JB |
2072 | static char *read_buffer; |
2073 | ||
f6f79b37 | 2074 | /* Read a \-escape sequence, assuming we already read the `\'. |
8f924df7 | 2075 | If the escape sequence forces unibyte, return eight-bit char. */ |
6f7f43d5 | 2076 | |
078e7b4a | 2077 | static int |
971de7fb | 2078 | read_escape (Lisp_Object readcharfun, int stringp) |
078e7b4a JB |
2079 | { |
2080 | register int c = READCHAR; | |
9735b9ce | 2081 | /* \u allows up to four hex digits, \U up to eight. Default to the |
fffa137c | 2082 | behavior for \u, and change this value in the case that \U is seen. */ |
71b169b8 | 2083 | int unicode_hex_count = 4; |
f6f79b37 | 2084 | |
078e7b4a JB |
2085 | switch (c) |
2086 | { | |
f3849f25 | 2087 | case -1: |
da3b886d | 2088 | end_of_file_error (); |
f3849f25 | 2089 | |
078e7b4a | 2090 | case 'a': |
265a9e55 | 2091 | return '\007'; |
078e7b4a JB |
2092 | case 'b': |
2093 | return '\b'; | |
f405a585 RS |
2094 | case 'd': |
2095 | return 0177; | |
078e7b4a JB |
2096 | case 'e': |
2097 | return 033; | |
2098 | case 'f': | |
2099 | return '\f'; | |
2100 | case 'n': | |
2101 | return '\n'; | |
2102 | case 'r': | |
2103 | return '\r'; | |
2104 | case 't': | |
2105 | return '\t'; | |
2106 | case 'v': | |
2107 | return '\v'; | |
2108 | case '\n': | |
2109 | return -1; | |
e28552a4 | 2110 | case ' ': |
e7fc914b KH |
2111 | if (stringp) |
2112 | return -1; | |
2113 | return ' '; | |
078e7b4a JB |
2114 | |
2115 | case 'M': | |
2116 | c = READCHAR; | |
2117 | if (c != '-') | |
2118 | error ("Invalid escape character syntax"); | |
2119 | c = READCHAR; | |
2120 | if (c == '\\') | |
8792be66 | 2121 | c = read_escape (readcharfun, 0); |
7bd279cd | 2122 | return c | meta_modifier; |
f405a585 RS |
2123 | |
2124 | case 'S': | |
2125 | c = READCHAR; | |
2126 | if (c != '-') | |
2127 | error ("Invalid escape character syntax"); | |
2128 | c = READCHAR; | |
2129 | if (c == '\\') | |
8792be66 | 2130 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2131 | return c | shift_modifier; |
2132 | ||
2133 | case 'H': | |
2134 | c = READCHAR; | |
2135 | if (c != '-') | |
2136 | error ("Invalid escape character syntax"); | |
2137 | c = READCHAR; | |
2138 | if (c == '\\') | |
8792be66 | 2139 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2140 | return c | hyper_modifier; |
2141 | ||
2142 | case 'A': | |
2143 | c = READCHAR; | |
2144 | if (c != '-') | |
2145 | error ("Invalid escape character syntax"); | |
2146 | c = READCHAR; | |
2147 | if (c == '\\') | |
8792be66 | 2148 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2149 | return c | alt_modifier; |
2150 | ||
2151 | case 's': | |
2152 | c = READCHAR; | |
4d7528d0 | 2153 | if (stringp || c != '-') |
010b7eac RS |
2154 | { |
2155 | UNREAD (c); | |
2156 | return ' '; | |
2157 | } | |
7bd279cd RS |
2158 | c = READCHAR; |
2159 | if (c == '\\') | |
8792be66 | 2160 | c = read_escape (readcharfun, 0); |
7bd279cd | 2161 | return c | super_modifier; |
078e7b4a JB |
2162 | |
2163 | case 'C': | |
2164 | c = READCHAR; | |
2165 | if (c != '-') | |
2166 | error ("Invalid escape character syntax"); | |
2167 | case '^': | |
2168 | c = READCHAR; | |
2169 | if (c == '\\') | |
8792be66 | 2170 | c = read_escape (readcharfun, 0); |
164d590d KH |
2171 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
2172 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
2173 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
2174 | return c | ctrl_modifier; | |
f405a585 RS |
2175 | /* ASCII control chars are made from letters (both cases), |
2176 | as well as the non-letters within 0100...0137. */ | |
2177 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
2178 | return (c & (037 | ~0177)); | |
2179 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
2180 | return (c & (037 | ~0177)); | |
078e7b4a | 2181 | else |
7bd279cd | 2182 | return c | ctrl_modifier; |
078e7b4a JB |
2183 | |
2184 | case '0': | |
2185 | case '1': | |
2186 | case '2': | |
2187 | case '3': | |
2188 | case '4': | |
2189 | case '5': | |
2190 | case '6': | |
2191 | case '7': | |
2192 | /* An octal escape, as in ANSI C. */ | |
2193 | { | |
2194 | register int i = c - '0'; | |
2195 | register int count = 0; | |
2196 | while (++count < 3) | |
2197 | { | |
2198 | if ((c = READCHAR) >= '0' && c <= '7') | |
2199 | { | |
2200 | i *= 8; | |
2201 | i += c - '0'; | |
2202 | } | |
2203 | else | |
2204 | { | |
2205 | UNREAD (c); | |
2206 | break; | |
2207 | } | |
2208 | } | |
177c0ea7 | 2209 | |
8f924df7 | 2210 | if (i >= 0x80 && i < 0x100) |
8792be66 | 2211 | i = BYTE8_TO_CHAR (i); |
078e7b4a JB |
2212 | return i; |
2213 | } | |
2214 | ||
2215 | case 'x': | |
2216 | /* A hex escape, as in ANSI C. */ | |
2217 | { | |
2218 | int i = 0; | |
1571601b | 2219 | int count = 0; |
078e7b4a JB |
2220 | while (1) |
2221 | { | |
2222 | c = READCHAR; | |
2223 | if (c >= '0' && c <= '9') | |
2224 | { | |
2225 | i *= 16; | |
2226 | i += c - '0'; | |
2227 | } | |
2228 | else if ((c >= 'a' && c <= 'f') | |
2229 | || (c >= 'A' && c <= 'F')) | |
2230 | { | |
2231 | i *= 16; | |
2232 | if (c >= 'a' && c <= 'f') | |
2233 | i += c - 'a' + 10; | |
2234 | else | |
2235 | i += c - 'A' + 10; | |
2236 | } | |
2237 | else | |
2238 | { | |
2239 | UNREAD (c); | |
2240 | break; | |
2241 | } | |
39019e54 PE |
2242 | if (MAX_CHAR < i) |
2243 | error ("Hex character out of range: \\x%x...", i); | |
82cb60d3 | 2244 | count += count < 3; |
078e7b4a | 2245 | } |
f6f79b37 | 2246 | |
1571601b | 2247 | if (count < 3 && i >= 0x80) |
8792be66 | 2248 | return BYTE8_TO_CHAR (i); |
078e7b4a JB |
2249 | return i; |
2250 | } | |
2251 | ||
71b169b8 EZ |
2252 | case 'U': |
2253 | /* Post-Unicode-2.0: Up to eight hex chars. */ | |
2254 | unicode_hex_count = 8; | |
2255 | case 'u': | |
2256 | ||
9735b9ce | 2257 | /* A Unicode escape. We only permit them in strings and characters, |
71b169b8 EZ |
2258 | not arbitrarily in the source code, as in some other languages. */ |
2259 | { | |
a808f22d | 2260 | unsigned int i = 0; |
71b169b8 | 2261 | int count = 0; |
71b169b8 EZ |
2262 | |
2263 | while (++count <= unicode_hex_count) | |
2264 | { | |
2265 | c = READCHAR; | |
a3ac22e4 | 2266 | /* isdigit and isalpha may be locale-specific, which we don't |
71b169b8 EZ |
2267 | want. */ |
2268 | if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); | |
2269 | else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
2270 | else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
2271 | else | |
39019e54 | 2272 | error ("Non-hex digit used for Unicode escape"); |
71b169b8 | 2273 | } |
a808f22d KH |
2274 | if (i > 0x10FFFF) |
2275 | error ("Non-Unicode character: 0x%x", i); | |
7ea7f636 | 2276 | return i; |
71b169b8 EZ |
2277 | } |
2278 | ||
078e7b4a JB |
2279 | default: |
2280 | return c; | |
2281 | } | |
2282 | } | |
2283 | ||
a108c10b PE |
2284 | /* Return the digit that CHARACTER stands for in the given BASE. |
2285 | Return -1 if CHARACTER is out of range for BASE, | |
2286 | and -2 if CHARACTER is not valid for any supported BASE. */ | |
2287 | static inline int | |
2288 | digit_to_number (int character, int base) | |
2289 | { | |
2290 | int digit; | |
2291 | ||
2292 | if ('0' <= character && character <= '9') | |
2293 | digit = character - '0'; | |
2294 | else if ('a' <= character && character <= 'z') | |
2295 | digit = character - 'a' + 10; | |
2296 | else if ('A' <= character && character <= 'Z') | |
2297 | digit = character - 'A' + 10; | |
2298 | else | |
2299 | return -2; | |
2300 | ||
2301 | return digit < base ? digit : -1; | |
2302 | } | |
2303 | ||
bf5d1a17 GM |
2304 | /* Read an integer in radix RADIX using READCHARFUN to read |
2305 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
2306 | read error is signaled . Value is the integer read. Signals an | |
2307 | error if encountering invalid read syntax or if RADIX is out of | |
2308 | range. */ | |
2309 | ||
2310 | static Lisp_Object | |
8b9ac8b4 | 2311 | read_integer (Lisp_Object readcharfun, EMACS_INT radix) |
bf5d1a17 | 2312 | { |
8b9ac8b4 PE |
2313 | /* Room for sign, leading 0, other digits, trailing null byte. |
2314 | Also, room for invalid syntax diagnostic. */ | |
2315 | char buf[max (1 + 1 + sizeof (uintmax_t) * CHAR_BIT + 1, | |
2316 | sizeof "integer, radix " + INT_STRLEN_BOUND (EMACS_INT))]; | |
a108c10b PE |
2317 | |
2318 | int valid = -1; /* 1 if valid, 0 if not, -1 if incomplete. */ | |
bf5d1a17 GM |
2319 | |
2320 | if (radix < 2 || radix > 36) | |
a108c10b | 2321 | valid = 0; |
bf5d1a17 GM |
2322 | else |
2323 | { | |
a108c10b PE |
2324 | char *p = buf; |
2325 | int c, digit; | |
bf5d1a17 GM |
2326 | |
2327 | c = READCHAR; | |
a108c10b | 2328 | if (c == '-' || c == '+') |
bf5d1a17 | 2329 | { |
a108c10b | 2330 | *p++ = c; |
bf5d1a17 | 2331 | c = READCHAR; |
bf5d1a17 | 2332 | } |
177c0ea7 | 2333 | |
a108c10b | 2334 | if (c == '0') |
bf5d1a17 | 2335 | { |
a108c10b PE |
2336 | *p++ = c; |
2337 | valid = 1; | |
bf5d1a17 | 2338 | |
a108c10b PE |
2339 | /* Ignore redundant leading zeros, so the buffer doesn't |
2340 | fill up with them. */ | |
2341 | do | |
2342 | c = READCHAR; | |
2343 | while (c == '0'); | |
2344 | } | |
2345 | ||
2346 | while (-1 <= (digit = digit_to_number (c, radix))) | |
2347 | { | |
2348 | if (digit == -1) | |
2349 | valid = 0; | |
2350 | if (valid < 0) | |
2351 | valid = 1; | |
2352 | ||
2353 | if (p < buf + sizeof buf - 1) | |
2354 | *p++ = c; | |
2355 | else | |
2356 | valid = 0; | |
bf5d1a17 | 2357 | |
bf5d1a17 GM |
2358 | c = READCHAR; |
2359 | } | |
a108c10b | 2360 | |
0a6a104b | 2361 | UNREAD (c); |
a108c10b | 2362 | *p = '\0'; |
bf5d1a17 GM |
2363 | } |
2364 | ||
a108c10b | 2365 | if (! valid) |
bf5d1a17 | 2366 | { |
8b9ac8b4 | 2367 | sprintf (buf, "integer, radix %"pI"d", radix); |
e4d29b33 | 2368 | invalid_syntax (buf); |
bf5d1a17 GM |
2369 | } |
2370 | ||
a108c10b | 2371 | return string_to_number (buf, radix, 0); |
bf5d1a17 GM |
2372 | } |
2373 | ||
2374 | ||
6428369f KH |
2375 | /* If the next token is ')' or ']' or '.', we store that character |
2376 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
2377 | zero in *PCH and we read and return one lisp object. |
2378 | ||
2379 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
2380 | ||
078e7b4a | 2381 | static Lisp_Object |
971de7fb | 2382 | read1 (register Lisp_Object readcharfun, int *pch, int first_in_list) |
078e7b4a JB |
2383 | { |
2384 | register int c; | |
3c346cc3 | 2385 | unsigned uninterned_symbol = 0; |
1202434b | 2386 | int multibyte; |
4ad679f9 | 2387 | |
6428369f | 2388 | *pch = 0; |
8792be66 | 2389 | load_each_byte = 0; |
078e7b4a JB |
2390 | |
2391 | retry: | |
2392 | ||
1202434b | 2393 | c = READCHAR_REPORT_MULTIBYTE (&multibyte); |
9c97398c GM |
2394 | if (c < 0) |
2395 | end_of_file_error (); | |
078e7b4a JB |
2396 | |
2397 | switch (c) | |
2398 | { | |
2399 | case '(': | |
2400 | return read_list (0, readcharfun); | |
2401 | ||
2402 | case '[': | |
c15cfd1f | 2403 | return read_vector (readcharfun, 0); |
078e7b4a JB |
2404 | |
2405 | case ')': | |
2406 | case ']': | |
078e7b4a | 2407 | { |
6428369f KH |
2408 | *pch = c; |
2409 | return Qnil; | |
078e7b4a JB |
2410 | } |
2411 | ||
2412 | case '#': | |
200f684e | 2413 | c = READCHAR; |
f19a0f5b TZ |
2414 | if (c == 's') |
2415 | { | |
2416 | c = READCHAR; | |
2417 | if (c == '(') | |
2418 | { | |
2419 | /* Accept extended format for hashtables (extensible to | |
2420 | other types), e.g. | |
2421 | #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */ | |
2422 | Lisp_Object tmp = read_list (0, readcharfun); | |
2423 | Lisp_Object head = CAR_SAFE (tmp); | |
2424 | Lisp_Object data = Qnil; | |
2425 | Lisp_Object val = Qnil; | |
2426 | /* The size is 2 * number of allowed keywords to | |
2427 | make-hash-table. */ | |
9735b9ce | 2428 | Lisp_Object params[10]; |
f19a0f5b TZ |
2429 | Lisp_Object ht; |
2430 | Lisp_Object key = Qnil; | |
2431 | int param_count = 0; | |
9735b9ce | 2432 | |
f19a0f5b TZ |
2433 | if (!EQ (head, Qhash_table)) |
2434 | error ("Invalid extended read marker at head of #s list " | |
2435 | "(only hash-table allowed)"); | |
9735b9ce | 2436 | |
f19a0f5b TZ |
2437 | tmp = CDR_SAFE (tmp); |
2438 | ||
2439 | /* This is repetitive but fast and simple. */ | |
2440 | params[param_count] = QCsize; | |
2441 | params[param_count+1] = Fplist_get (tmp, Qsize); | |
5721b4ed AS |
2442 | if (!NILP (params[param_count + 1])) |
2443 | param_count += 2; | |
f19a0f5b TZ |
2444 | |
2445 | params[param_count] = QCtest; | |
2446 | params[param_count+1] = Fplist_get (tmp, Qtest); | |
5721b4ed AS |
2447 | if (!NILP (params[param_count + 1])) |
2448 | param_count += 2; | |
f19a0f5b TZ |
2449 | |
2450 | params[param_count] = QCweakness; | |
2451 | params[param_count+1] = Fplist_get (tmp, Qweakness); | |
5721b4ed AS |
2452 | if (!NILP (params[param_count + 1])) |
2453 | param_count += 2; | |
f19a0f5b TZ |
2454 | |
2455 | params[param_count] = QCrehash_size; | |
2456 | params[param_count+1] = Fplist_get (tmp, Qrehash_size); | |
5721b4ed AS |
2457 | if (!NILP (params[param_count + 1])) |
2458 | param_count += 2; | |
f19a0f5b TZ |
2459 | |
2460 | params[param_count] = QCrehash_threshold; | |
2461 | params[param_count+1] = Fplist_get (tmp, Qrehash_threshold); | |
5721b4ed AS |
2462 | if (!NILP (params[param_count + 1])) |
2463 | param_count += 2; | |
f19a0f5b TZ |
2464 | |
2465 | /* This is the hashtable data. */ | |
2466 | data = Fplist_get (tmp, Qdata); | |
2467 | ||
2468 | /* Now use params to make a new hashtable and fill it. */ | |
2469 | ht = Fmake_hash_table (param_count, params); | |
9735b9ce | 2470 | |
f19a0f5b TZ |
2471 | while (CONSP (data)) |
2472 | { | |
2473 | key = XCAR (data); | |
2474 | data = XCDR (data); | |
2475 | if (!CONSP (data)) | |
2476 | error ("Odd number of elements in hashtable data"); | |
2477 | val = XCAR (data); | |
2478 | data = XCDR (data); | |
2479 | Fputhash (key, val, ht); | |
2480 | } | |
9735b9ce | 2481 | |
f19a0f5b TZ |
2482 | return ht; |
2483 | } | |
5721b4ed | 2484 | UNREAD (c); |
e4d29b33 | 2485 | invalid_syntax ("#"); |
f19a0f5b | 2486 | } |
c2390933 RS |
2487 | if (c == '^') |
2488 | { | |
2489 | c = READCHAR; | |
2490 | if (c == '[') | |
2491 | { | |
2492 | Lisp_Object tmp; | |
c15cfd1f | 2493 | tmp = read_vector (readcharfun, 0); |
77b37c05 | 2494 | if (ASIZE (tmp) < CHAR_TABLE_STANDARD_SLOTS) |
c2390933 | 2495 | error ("Invalid size char-table"); |
985773c9 | 2496 | XSETPVECTYPE (XVECTOR (tmp), PVEC_CHAR_TABLE); |
c2390933 RS |
2497 | return tmp; |
2498 | } | |
3701b5de KH |
2499 | else if (c == '^') |
2500 | { | |
2501 | c = READCHAR; | |
2502 | if (c == '[') | |
2503 | { | |
2504 | Lisp_Object tmp; | |
d311d28c PE |
2505 | int depth; |
2506 | ptrdiff_t size; | |
8f924df7 | 2507 | |
c15cfd1f | 2508 | tmp = read_vector (readcharfun, 0); |
d311d28c | 2509 | if (! RANGED_INTEGERP (1, AREF (tmp, 0), 3)) |
1571601b KH |
2510 | error ("Invalid depth in char-table"); |
2511 | depth = XINT (AREF (tmp, 0)); | |
77b37c05 | 2512 | size = ASIZE (tmp) - 2; |
1571601b | 2513 | if (chartab_size [depth] != size) |
3701b5de | 2514 | error ("Invalid size char-table"); |
985773c9 | 2515 | XSETPVECTYPE (XVECTOR (tmp), PVEC_SUB_CHAR_TABLE); |
3701b5de KH |
2516 | return tmp; |
2517 | } | |
e4d29b33 | 2518 | invalid_syntax ("#^^"); |
3701b5de | 2519 | } |
e4d29b33 | 2520 | invalid_syntax ("#^"); |
c2390933 RS |
2521 | } |
2522 | if (c == '&') | |
2523 | { | |
2524 | Lisp_Object length; | |
2525 | length = read1 (readcharfun, pch, first_in_list); | |
2526 | c = READCHAR; | |
2527 | if (c == '"') | |
2528 | { | |
2529 | Lisp_Object tmp, val; | |
82cb60d3 | 2530 | EMACS_INT size_in_chars |
d1ca81d9 AS |
2531 | = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2532 | / BOOL_VECTOR_BITS_PER_CHAR); | |
c2390933 RS |
2533 | |
2534 | UNREAD (c); | |
2535 | tmp = read1 (readcharfun, pch, first_in_list); | |
8792be66 | 2536 | if (STRING_MULTIBYTE (tmp) |
8f924df7 | 2537 | || (size_in_chars != SCHARS (tmp) |
8792be66 KH |
2538 | /* We used to print 1 char too many |
2539 | when the number of bits was a multiple of 8. | |
2540 | Accept such input in case it came from an old | |
2541 | version. */ | |
2542 | && ! (XFASTINT (length) | |
327719ee | 2543 | == (SCHARS (tmp) - 1) * BOOL_VECTOR_BITS_PER_CHAR))) |
e4d29b33 | 2544 | invalid_syntax ("#&..."); |
177c0ea7 | 2545 | |
c2390933 | 2546 | val = Fmake_bool_vector (length, Qnil); |
72af86bd | 2547 | memcpy (XBOOL_VECTOR (val)->data, SDATA (tmp), size_in_chars); |
67d3b149 | 2548 | /* Clear the extraneous bits in the last byte. */ |
d1ca81d9 | 2549 | if (XINT (length) != size_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
67d3b149 | 2550 | XBOOL_VECTOR (val)->data[size_in_chars - 1] |
d1ca81d9 | 2551 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
c2390933 RS |
2552 | return val; |
2553 | } | |
e4d29b33 | 2554 | invalid_syntax ("#&..."); |
c2390933 | 2555 | } |
200f684e | 2556 | if (c == '[') |
876c194c SM |
2557 | { |
2558 | /* Accept compiled functions at read-time so that we don't have to | |
2559 | build them using function calls. */ | |
2560 | Lisp_Object tmp; | |
2561 | tmp = read_vector (readcharfun, 1); | |
77b37c05 | 2562 | return Fmake_byte_code (ASIZE (tmp), |
876c194c SM |
2563 | XVECTOR (tmp)->contents); |
2564 | } | |
748ef62f RS |
2565 | if (c == '(') |
2566 | { | |
2567 | Lisp_Object tmp; | |
2568 | struct gcpro gcpro1; | |
e28552a4 | 2569 | int ch; |
748ef62f RS |
2570 | |
2571 | /* Read the string itself. */ | |
17634846 | 2572 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 2573 | if (ch != 0 || !STRINGP (tmp)) |
e4d29b33 | 2574 | invalid_syntax ("#"); |
748ef62f RS |
2575 | GCPRO1 (tmp); |
2576 | /* Read the intervals and their properties. */ | |
2577 | while (1) | |
2578 | { | |
2579 | Lisp_Object beg, end, plist; | |
2580 | ||
17634846 | 2581 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 2582 | end = plist = Qnil; |
6428369f KH |
2583 | if (ch == ')') |
2584 | break; | |
2585 | if (ch == 0) | |
17634846 | 2586 | end = read1 (readcharfun, &ch, 0); |
6428369f | 2587 | if (ch == 0) |
17634846 | 2588 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 2589 | if (ch) |
e4d29b33 | 2590 | invalid_syntax ("Invalid string property list"); |
748ef62f RS |
2591 | Fset_text_properties (beg, end, plist, tmp); |
2592 | } | |
2593 | UNGCPRO; | |
2594 | return tmp; | |
2595 | } | |
177c0ea7 | 2596 | |
20ea2964 RS |
2597 | /* #@NUMBER is used to skip NUMBER following characters. |
2598 | That's used in .elc files to skip over doc strings | |
2599 | and function definitions. */ | |
2600 | if (c == '@') | |
2601 | { | |
bfbbd7e7 PE |
2602 | enum { extra = 100 }; |
2603 | ptrdiff_t i, nskip = 0; | |
20ea2964 | 2604 | |
8792be66 | 2605 | load_each_byte = 1; |
20ea2964 RS |
2606 | /* Read a decimal integer. */ |
2607 | while ((c = READCHAR) >= 0 | |
2608 | && c >= '0' && c <= '9') | |
2609 | { | |
bfbbd7e7 PE |
2610 | if ((STRING_BYTES_BOUND - extra) / 10 <= nskip) |
2611 | string_overflow (); | |
20ea2964 RS |
2612 | nskip *= 10; |
2613 | nskip += c - '0'; | |
2614 | } | |
0a6a104b | 2615 | UNREAD (c); |
177c0ea7 | 2616 | |
8792be66 KH |
2617 | if (load_force_doc_strings |
2618 | && (EQ (readcharfun, Qget_file_char) | |
2619 | || EQ (readcharfun, Qget_emacs_mule_file_char))) | |
b2a30870 RS |
2620 | { |
2621 | /* If we are supposed to force doc strings into core right now, | |
2622 | record the last string that we skipped, | |
2623 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2624 | |
2625 | /* But first exchange saved_doc_string | |
2626 | with prev_saved_doc_string, so we save two strings. */ | |
2627 | { | |
2628 | char *temp = saved_doc_string; | |
bfbbd7e7 | 2629 | ptrdiff_t temp_size = saved_doc_string_size; |
68c45bf0 | 2630 | file_offset temp_pos = saved_doc_string_position; |
bfbbd7e7 | 2631 | ptrdiff_t temp_len = saved_doc_string_length; |
c15cfd1f RS |
2632 | |
2633 | saved_doc_string = prev_saved_doc_string; | |
2634 | saved_doc_string_size = prev_saved_doc_string_size; | |
2635 | saved_doc_string_position = prev_saved_doc_string_position; | |
2636 | saved_doc_string_length = prev_saved_doc_string_length; | |
2637 | ||
2638 | prev_saved_doc_string = temp; | |
2639 | prev_saved_doc_string_size = temp_size; | |
2640 | prev_saved_doc_string_position = temp_pos; | |
2641 | prev_saved_doc_string_length = temp_len; | |
2642 | } | |
2643 | ||
b2a30870 RS |
2644 | if (saved_doc_string_size == 0) |
2645 | { | |
37d0112b | 2646 | saved_doc_string = (char *) xmalloc (nskip + extra); |
bfbbd7e7 | 2647 | saved_doc_string_size = nskip + extra; |
b2a30870 RS |
2648 | } |
2649 | if (nskip > saved_doc_string_size) | |
2650 | { | |
11938f10 | 2651 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
37d0112b PE |
2652 | nskip + extra); |
2653 | saved_doc_string_size = nskip + extra; | |
b2a30870 RS |
2654 | } |
2655 | ||
68c45bf0 | 2656 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2657 | |
2658 | /* Copy that many characters into saved_doc_string. */ | |
2659 | for (i = 0; i < nskip && c >= 0; i++) | |
2660 | saved_doc_string[i] = c = READCHAR; | |
2661 | ||
2662 | saved_doc_string_length = i; | |
2663 | } | |
2664 | else | |
b2a30870 RS |
2665 | { |
2666 | /* Skip that many characters. */ | |
2667 | for (i = 0; i < nskip && c >= 0; i++) | |
2668 | c = READCHAR; | |
2669 | } | |
d49f0c1a | 2670 | |
8792be66 | 2671 | load_each_byte = 0; |
20ea2964 RS |
2672 | goto retry; |
2673 | } | |
e2518d02 RS |
2674 | if (c == '!') |
2675 | { | |
2676 | /* #! appears at the beginning of an executable file. | |
2677 | Skip the first line. */ | |
225c7a07 | 2678 | while (c != '\n' && c >= 0) |
e2518d02 RS |
2679 | c = READCHAR; |
2680 | goto retry; | |
2681 | } | |
20ea2964 RS |
2682 | if (c == '$') |
2683 | return Vload_file_name; | |
2b6cae0c RS |
2684 | if (c == '\'') |
2685 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2686 | /* #:foo is the uninterned symbol named foo. */ |
2687 | if (c == ':') | |
2688 | { | |
2689 | uninterned_symbol = 1; | |
2690 | c = READCHAR; | |
52968808 AS |
2691 | if (!(c > 040 |
2692 | && c != 0x8a0 | |
2693 | && (c >= 0200 | |
0a6a104b | 2694 | || strchr ("\"';()[]#`,", c) == NULL))) |
52968808 AS |
2695 | { |
2696 | /* No symbol character follows, this is the empty | |
2697 | symbol. */ | |
0a6a104b | 2698 | UNREAD (c); |
52968808 AS |
2699 | return Fmake_symbol (build_string ("")); |
2700 | } | |
2701 | goto read_symbol; | |
4ad679f9 | 2702 | } |
9a79b20c AS |
2703 | /* ## is the empty symbol. */ |
2704 | if (c == '#') | |
2705 | return Fintern (build_string (""), Qnil); | |
4ad679f9 EN |
2706 | /* Reader forms that can reuse previously read objects. */ |
2707 | if (c >= '0' && c <= '9') | |
2708 | { | |
8b9ac8b4 | 2709 | EMACS_INT n = 0; |
4ad679f9 | 2710 | Lisp_Object tem; |
2b6cae0c | 2711 | |
4ad679f9 EN |
2712 | /* Read a non-negative integer. */ |
2713 | while (c >= '0' && c <= '9') | |
2714 | { | |
8b9ac8b4 PE |
2715 | if (MOST_POSITIVE_FIXNUM / 10 < n |
2716 | || MOST_POSITIVE_FIXNUM < n * 10 + c - '0') | |
2717 | n = MOST_POSITIVE_FIXNUM + 1; | |
2718 | else | |
2719 | n = n * 10 + c - '0'; | |
4ad679f9 EN |
2720 | c = READCHAR; |
2721 | } | |
8b9ac8b4 PE |
2722 | |
2723 | if (n <= MOST_POSITIVE_FIXNUM) | |
4ad679f9 | 2724 | { |
8b9ac8b4 PE |
2725 | if (c == 'r' || c == 'R') |
2726 | return read_integer (readcharfun, n); | |
9e062b6c | 2727 | |
8b9ac8b4 PE |
2728 | if (! NILP (Vread_circle)) |
2729 | { | |
2730 | /* #n=object returns object, but associates it with | |
2731 | n for #n#. */ | |
2732 | if (c == '=') | |
2733 | { | |
2734 | /* Make a placeholder for #n# to use temporarily */ | |
2735 | Lisp_Object placeholder; | |
2736 | Lisp_Object cell; | |
9e062b6c | 2737 | |
8b9ac8b4 PE |
2738 | placeholder = Fcons (Qnil, Qnil); |
2739 | cell = Fcons (make_number (n), placeholder); | |
2740 | read_objects = Fcons (cell, read_objects); | |
9e062b6c | 2741 | |
8b9ac8b4 PE |
2742 | /* Read the object itself. */ |
2743 | tem = read0 (readcharfun); | |
9e062b6c | 2744 | |
8b9ac8b4 PE |
2745 | /* Now put it everywhere the placeholder was... */ |
2746 | substitute_object_in_subtree (tem, placeholder); | |
177c0ea7 | 2747 | |
8b9ac8b4 PE |
2748 | /* ...and #n# will use the real value from now on. */ |
2749 | Fsetcdr (cell, tem); | |
177c0ea7 | 2750 | |
8b9ac8b4 PE |
2751 | return tem; |
2752 | } | |
2753 | ||
2754 | /* #n# returns a previously read object. */ | |
2755 | if (c == '#') | |
2756 | { | |
2757 | tem = Fassq (make_number (n), read_objects); | |
2758 | if (CONSP (tem)) | |
2759 | return XCDR (tem); | |
2760 | } | |
2761 | } | |
2762 | } | |
4ad679f9 EN |
2763 | /* Fall through to error message. */ |
2764 | } | |
bf5d1a17 GM |
2765 | else if (c == 'x' || c == 'X') |
2766 | return read_integer (readcharfun, 16); | |
2767 | else if (c == 'o' || c == 'O') | |
2768 | return read_integer (readcharfun, 8); | |
2769 | else if (c == 'b' || c == 'B') | |
2770 | return read_integer (readcharfun, 2); | |
20ea2964 | 2771 | |
200f684e | 2772 | UNREAD (c); |
e4d29b33 | 2773 | invalid_syntax ("#"); |
078e7b4a JB |
2774 | |
2775 | case ';': | |
2776 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2777 | goto retry; | |
2778 | ||
2779 | case '\'': | |
2780 | { | |
2781 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2782 | } | |
2783 | ||
17634846 | 2784 | case '`': |
9a39b306 TO |
2785 | { |
2786 | int next_char = READCHAR; | |
2787 | UNREAD (next_char); | |
2788 | /* Transition from old-style to new-style: | |
2789 | If we see "(`" it used to mean old-style, which usually works | |
2790 | fine because ` should almost never appear in such a position | |
2791 | for new-style. But occasionally we need "(`" to mean new | |
2792 | style, so we try to distinguish the two by the fact that we | |
2793 | can either write "( `foo" or "(` foo", where the first | |
2794 | intends to use new-style whereas the second intends to use | |
2795 | old-style. For Emacs-25, we should completely remove this | |
2796 | first_in_list exception (old-style can still be obtained via | |
2797 | "(\`" anyway). */ | |
bba3e508 | 2798 | if (!new_backquote_flag && first_in_list && next_char == ' ') |
9a39b306 TO |
2799 | { |
2800 | Vold_style_backquotes = Qt; | |
2801 | goto default_label; | |
2802 | } | |
2803 | else | |
2804 | { | |
2805 | Lisp_Object value; | |
17634846 | 2806 | |
9a39b306 TO |
2807 | new_backquote_flag++; |
2808 | value = read0 (readcharfun); | |
2809 | new_backquote_flag--; | |
17634846 | 2810 | |
9a39b306 TO |
2811 | return Fcons (Qbackquote, Fcons (value, Qnil)); |
2812 | } | |
2813 | } | |
17634846 | 2814 | case ',': |
bba3e508 SM |
2815 | { |
2816 | int next_char = READCHAR; | |
2817 | UNREAD (next_char); | |
2818 | /* Transition from old-style to new-style: | |
2819 | It used to be impossible to have a new-style , other than within | |
2820 | a new-style `. This is sufficient when ` and , are used in the | |
2821 | normal way, but ` and , can also appear in args to macros that | |
2822 | will not interpret them in the usual way, in which case , may be | |
2823 | used without any ` anywhere near. | |
2824 | So we now use the same heuristic as for backquote: old-style | |
2825 | unquotes are only recognized when first on a list, and when | |
2826 | followed by a space. | |
2827 | Because it's more difficult to peak 2 chars ahead, a new-style | |
2828 | ,@ can still not be used outside of a `, unless it's in the middle | |
2829 | of a list. */ | |
2830 | if (new_backquote_flag | |
2831 | || !first_in_list | |
2832 | || (next_char != ' ' && next_char != '@')) | |
2833 | { | |
2834 | Lisp_Object comma_type = Qnil; | |
2835 | Lisp_Object value; | |
2836 | int ch = READCHAR; | |
17634846 | 2837 | |
bba3e508 SM |
2838 | if (ch == '@') |
2839 | comma_type = Qcomma_at; | |
2840 | else if (ch == '.') | |
2841 | comma_type = Qcomma_dot; | |
2842 | else | |
2843 | { | |
2844 | if (ch >= 0) UNREAD (ch); | |
2845 | comma_type = Qcomma; | |
2846 | } | |
17634846 | 2847 | |
bba3e508 SM |
2848 | value = read0 (readcharfun); |
2849 | return Fcons (comma_type, Fcons (value, Qnil)); | |
2850 | } | |
2851 | else | |
2852 | { | |
2853 | Vold_style_backquotes = Qt; | |
2854 | goto default_label; | |
2855 | } | |
2856 | } | |
078e7b4a JB |
2857 | case '?': |
2858 | { | |
8792be66 | 2859 | int modifiers; |
df9c2be7 KS |
2860 | int next_char; |
2861 | int ok; | |
f6f79b37 | 2862 | |
078e7b4a | 2863 | c = READCHAR; |
9c97398c GM |
2864 | if (c < 0) |
2865 | end_of_file_error (); | |
078e7b4a | 2866 | |
b9284371 KS |
2867 | /* Accept `single space' syntax like (list ? x) where the |
2868 | whitespace character is SPC or TAB. | |
2869 | Other literal whitespace like NL, CR, and FF are not accepted, | |
2870 | as there are well-established escape sequences for these. */ | |
2871 | if (c == ' ' || c == '\t') | |
2872 | return make_number (c); | |
2873 | ||
078e7b4a | 2874 | if (c == '\\') |
8792be66 KH |
2875 | c = read_escape (readcharfun, 0); |
2876 | modifiers = c & CHAR_MODIFIER_MASK; | |
2877 | c &= ~CHAR_MODIFIER_MASK; | |
2878 | if (CHAR_BYTE8_P (c)) | |
2879 | c = CHAR_TO_BYTE8 (c); | |
2880 | c |= modifiers; | |
078e7b4a | 2881 | |
df9c2be7 | 2882 | next_char = READCHAR; |
bba3e508 SM |
2883 | ok = (next_char <= 040 |
2884 | || (next_char < 0200 | |
0a6a104b | 2885 | && strchr ("\"';()[]#?`,.", next_char) != NULL)); |
df9c2be7 | 2886 | UNREAD (next_char); |
336d4a9c KS |
2887 | if (ok) |
2888 | return make_number (c); | |
37cd4238 | 2889 | |
e4d29b33 | 2890 | invalid_syntax ("?"); |
078e7b4a JB |
2891 | } |
2892 | ||
00a9a935 | 2893 | case '"': |
078e7b4a | 2894 | { |
a742d646 GM |
2895 | char *p = read_buffer; |
2896 | char *end = read_buffer + read_buffer_size; | |
0902fe45 | 2897 | register int ch; |
1571601b KH |
2898 | /* Nonzero if we saw an escape sequence specifying |
2899 | a multibyte character. */ | |
e7fc914b | 2900 | int force_multibyte = 0; |
1571601b | 2901 | /* Nonzero if we saw an escape sequence specifying |
e7fc914b KH |
2902 | a single-byte character. */ |
2903 | int force_singlebyte = 0; | |
078e7b4a | 2904 | int cancel = 0; |
82cb60d3 | 2905 | ptrdiff_t nchars = 0; |
078e7b4a | 2906 | |
0902fe45 PE |
2907 | while ((ch = READCHAR) >= 0 |
2908 | && ch != '\"') | |
078e7b4a | 2909 | { |
449fea39 | 2910 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2911 | { |
82cb60d3 | 2912 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
2913 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
2914 | memory_full (SIZE_MAX); | |
5d65df0d | 2915 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
2916 | read_buffer_size * 2); |
2917 | read_buffer_size *= 2; | |
5d65df0d | 2918 | p = read_buffer + offset; |
078e7b4a JB |
2919 | end = read_buffer + read_buffer_size; |
2920 | } | |
bed23cb2 | 2921 | |
0902fe45 | 2922 | if (ch == '\\') |
03e88613 | 2923 | { |
1571601b | 2924 | int modifiers; |
f6f79b37 | 2925 | |
0902fe45 | 2926 | ch = read_escape (readcharfun, 1); |
bed23cb2 | 2927 | |
0902fe45 PE |
2928 | /* CH is -1 if \ newline has just been seen */ |
2929 | if (ch == -1) | |
03e88613 | 2930 | { |
bed23cb2 RS |
2931 | if (p == read_buffer) |
2932 | cancel = 1; | |
03e88613 RS |
2933 | continue; |
2934 | } | |
bed23cb2 | 2935 | |
0902fe45 PE |
2936 | modifiers = ch & CHAR_MODIFIER_MASK; |
2937 | ch = ch & ~CHAR_MODIFIER_MASK; | |
1571601b | 2938 | |
0902fe45 | 2939 | if (CHAR_BYTE8_P (ch)) |
e7fc914b | 2940 | force_singlebyte = 1; |
0902fe45 | 2941 | else if (! ASCII_CHAR_P (ch)) |
f6f79b37 | 2942 | force_multibyte = 1; |
0902fe45 | 2943 | else /* i.e. ASCII_CHAR_P (ch) */ |
1571601b KH |
2944 | { |
2945 | /* Allow `\C- ' and `\C-?'. */ | |
2946 | if (modifiers == CHAR_CTL) | |
2947 | { | |
0902fe45 PE |
2948 | if (ch == ' ') |
2949 | ch = 0, modifiers = 0; | |
2950 | else if (ch == '?') | |
2951 | ch = 127, modifiers = 0; | |
1571601b KH |
2952 | } |
2953 | if (modifiers & CHAR_SHIFT) | |
2954 | { | |
2955 | /* Shift modifier is valid only with [A-Za-z]. */ | |
0902fe45 | 2956 | if (ch >= 'A' && ch <= 'Z') |
1571601b | 2957 | modifiers &= ~CHAR_SHIFT; |
0902fe45 PE |
2958 | else if (ch >= 'a' && ch <= 'z') |
2959 | ch -= ('a' - 'A'), modifiers &= ~CHAR_SHIFT; | |
1571601b KH |
2960 | } |
2961 | ||
2962 | if (modifiers & CHAR_META) | |
2963 | { | |
2964 | /* Move the meta bit to the right place for a | |
2965 | string. */ | |
2966 | modifiers &= ~CHAR_META; | |
0902fe45 | 2967 | ch = BYTE8_TO_CHAR (ch | 0x80); |
1571601b KH |
2968 | force_singlebyte = 1; |
2969 | } | |
2970 | } | |
5150eeec | 2971 | |
1571601b KH |
2972 | /* Any modifiers remaining are invalid. */ |
2973 | if (modifiers) | |
2974 | error ("Invalid modifier in string"); | |
0902fe45 | 2975 | p += CHAR_STRING (ch, (unsigned char *) p); |
078e7b4a | 2976 | } |
8792be66 | 2977 | else |
5150eeec | 2978 | { |
0902fe45 PE |
2979 | p += CHAR_STRING (ch, (unsigned char *) p); |
2980 | if (CHAR_BYTE8_P (ch)) | |
988f7a0c | 2981 | force_singlebyte = 1; |
0902fe45 | 2982 | else if (! ASCII_CHAR_P (ch)) |
988f7a0c | 2983 | force_multibyte = 1; |
f943104a | 2984 | } |
5150eeec | 2985 | nchars++; |
078e7b4a | 2986 | } |
5150eeec | 2987 | |
0902fe45 | 2988 | if (ch < 0) |
9c97398c | 2989 | end_of_file_error (); |
078e7b4a JB |
2990 | |
2991 | /* If purifying, and string starts with \ newline, | |
2992 | return zero instead. This is for doc strings | |
08564963 | 2993 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 2994 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2995 | return make_number (0); |
2996 | ||
1571601b KH |
2997 | if (force_multibyte) |
2998 | /* READ_BUFFER already contains valid multibyte forms. */ | |
5150eeec | 2999 | ; |
1571601b | 3000 | else if (force_singlebyte) |
a742d646 | 3001 | { |
4a25e32a PE |
3002 | nchars = str_as_unibyte ((unsigned char *) read_buffer, |
3003 | p - read_buffer); | |
1571601b | 3004 | p = read_buffer + nchars; |
a742d646 | 3005 | } |
e28552a4 | 3006 | else |
cef2010d PE |
3007 | { |
3008 | /* Otherwise, READ_BUFFER contains only ASCII. */ | |
3009 | } | |
e7fc914b KH |
3010 | |
3011 | if (read_pure) | |
491f16a2 | 3012 | return make_pure_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3013 | (force_multibyte |
3014 | || (p - read_buffer != nchars))); | |
491f16a2 | 3015 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3016 | (force_multibyte |
3017 | || (p - read_buffer != nchars))); | |
078e7b4a JB |
3018 | } |
3019 | ||
109d300c JB |
3020 | case '.': |
3021 | { | |
109d300c JB |
3022 | int next_char = READCHAR; |
3023 | UNREAD (next_char); | |
3024 | ||
035eec48 | 3025 | if (next_char <= 040 |
e613ea97 | 3026 | || (next_char < 0200 |
0a6a104b | 3027 | && strchr ("\"';([#?`,", next_char) != NULL)) |
109d300c | 3028 | { |
6428369f KH |
3029 | *pch = c; |
3030 | return Qnil; | |
109d300c JB |
3031 | } |
3032 | ||
3033 | /* Otherwise, we fall through! Note that the atom-reading loop | |
3034 | below will now loop at least once, assuring that we will not | |
3035 | try to UNREAD two characters in a row. */ | |
3036 | } | |
078e7b4a | 3037 | default: |
17634846 | 3038 | default_label: |
88852d45 | 3039 | if (c <= 040) goto retry; |
adef3de7 RS |
3040 | if (c == 0x8a0) /* NBSP */ |
3041 | goto retry; | |
52968808 AS |
3042 | |
3043 | read_symbol: | |
078e7b4a | 3044 | { |
38404229 | 3045 | char *p = read_buffer; |
481c6336 | 3046 | int quoted = 0; |
46cfea45 | 3047 | EMACS_INT start_position = readchar_count - 1; |
078e7b4a JB |
3048 | |
3049 | { | |
38404229 | 3050 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 3051 | |
ef1b0ba7 | 3052 | do |
078e7b4a | 3053 | { |
449fea39 | 3054 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 3055 | { |
82cb60d3 | 3056 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3057 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3058 | memory_full (SIZE_MAX); | |
5d65df0d | 3059 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3060 | read_buffer_size * 2); |
3061 | read_buffer_size *= 2; | |
5d65df0d | 3062 | p = read_buffer + offset; |
078e7b4a JB |
3063 | end = read_buffer + read_buffer_size; |
3064 | } | |
177c0ea7 | 3065 | |
078e7b4a | 3066 | if (c == '\\') |
481c6336 RS |
3067 | { |
3068 | c = READCHAR; | |
4ab11c09 GM |
3069 | if (c == -1) |
3070 | end_of_file_error (); | |
481c6336 RS |
3071 | quoted = 1; |
3072 | } | |
6f7f43d5 | 3073 | |
1202434b | 3074 | if (multibyte) |
4a25e32a | 3075 | p += CHAR_STRING (c, (unsigned char *) p); |
1202434b KH |
3076 | else |
3077 | *p++ = c; | |
078e7b4a | 3078 | c = READCHAR; |
0a6a104b AS |
3079 | } |
3080 | while (c > 040 | |
3081 | && c != 0x8a0 /* NBSP */ | |
3082 | && (c >= 0200 | |
3083 | || strchr ("\"';()[]#`,", c) == NULL)); | |
078e7b4a JB |
3084 | |
3085 | if (p == end) | |
3086 | { | |
82cb60d3 | 3087 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3088 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3089 | memory_full (SIZE_MAX); | |
5d65df0d | 3090 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3091 | read_buffer_size * 2); |
3092 | read_buffer_size *= 2; | |
5d65df0d GM |
3093 | p = read_buffer + offset; |
3094 | end = read_buffer + read_buffer_size; | |
078e7b4a JB |
3095 | } |
3096 | *p = 0; | |
0a6a104b | 3097 | UNREAD (c); |
078e7b4a JB |
3098 | } |
3099 | ||
4ad679f9 | 3100 | if (!quoted && !uninterned_symbol) |
481c6336 | 3101 | { |
452f4150 PE |
3102 | Lisp_Object result = string_to_number (read_buffer, 10, 0); |
3103 | if (! NILP (result)) | |
8b9587d7 | 3104 | return result; |
481c6336 | 3105 | } |
abb13b09 | 3106 | { |
e93abe3d | 3107 | Lisp_Object name, result; |
d311d28c PE |
3108 | ptrdiff_t nbytes = p - read_buffer; |
3109 | ptrdiff_t nchars | |
4a25e32a PE |
3110 | = (multibyte |
3111 | ? multibyte_chars_in_text ((unsigned char *) read_buffer, | |
3112 | nbytes) | |
e93abe3d KH |
3113 | : nbytes); |
3114 | ||
3115 | if (uninterned_symbol && ! NILP (Vpurify_flag)) | |
3116 | name = make_pure_string (read_buffer, nchars, nbytes, multibyte); | |
3117 | else | |
3118 | name = make_specified_string (read_buffer, nchars, nbytes,multibyte); | |
3119 | result = (uninterned_symbol ? Fmake_symbol (name) | |
3120 | : Fintern (name, Qnil)); | |
1202434b | 3121 | |
abb13b09 CW |
3122 | if (EQ (Vread_with_symbol_positions, Qt) |
3123 | || EQ (Vread_with_symbol_positions, readcharfun)) | |
177c0ea7 | 3124 | Vread_symbol_positions_list = |
0a6a104b | 3125 | Fcons (Fcons (result, make_number (start_position)), |
abb13b09 CW |
3126 | Vread_symbol_positions_list); |
3127 | return result; | |
3128 | } | |
078e7b4a JB |
3129 | } |
3130 | } | |
3131 | } | |
3132 | \f | |
9e062b6c RS |
3133 | |
3134 | /* List of nodes we've seen during substitute_object_in_subtree. */ | |
3135 | static Lisp_Object seen_list; | |
3136 | ||
3137 | static void | |
971de7fb | 3138 | substitute_object_in_subtree (Lisp_Object object, Lisp_Object placeholder) |
9e062b6c RS |
3139 | { |
3140 | Lisp_Object check_object; | |
3141 | ||
3142 | /* We haven't seen any objects when we start. */ | |
3143 | seen_list = Qnil; | |
3144 | ||
3145 | /* Make all the substitutions. */ | |
3146 | check_object | |
3147 | = substitute_object_recurse (object, placeholder, object); | |
177c0ea7 | 3148 | |
9e062b6c RS |
3149 | /* Clear seen_list because we're done with it. */ |
3150 | seen_list = Qnil; | |
3151 | ||
3152 | /* The returned object here is expected to always eq the | |
3153 | original. */ | |
3154 | if (!EQ (check_object, object)) | |
3155 | error ("Unexpected mutation error in reader"); | |
3156 | } | |
3157 | ||
3158 | /* Feval doesn't get called from here, so no gc protection is needed. */ | |
7a3d90dc SM |
3159 | #define SUBSTITUTE(get_val, set_val) \ |
3160 | do { \ | |
3161 | Lisp_Object old_value = get_val; \ | |
3162 | Lisp_Object true_value \ | |
3163 | = substitute_object_recurse (object, placeholder, \ | |
3164 | old_value); \ | |
3165 | \ | |
3166 | if (!EQ (old_value, true_value)) \ | |
3167 | { \ | |
3168 | set_val; \ | |
3169 | } \ | |
3170 | } while (0) | |
9e062b6c RS |
3171 | |
3172 | static Lisp_Object | |
971de7fb | 3173 | substitute_object_recurse (Lisp_Object object, Lisp_Object placeholder, Lisp_Object subtree) |
9e062b6c RS |
3174 | { |
3175 | /* If we find the placeholder, return the target object. */ | |
3176 | if (EQ (placeholder, subtree)) | |
3177 | return object; | |
3178 | ||
3179 | /* If we've been to this node before, don't explore it again. */ | |
3180 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) | |
3181 | return subtree; | |
3182 | ||
3183 | /* If this node can be the entry point to a cycle, remember that | |
3184 | we've seen it. It can only be such an entry point if it was made | |
3185 | by #n=, which means that we can find it as a value in | |
3186 | read_objects. */ | |
3187 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
3188 | seen_list = Fcons (subtree, seen_list); | |
177c0ea7 | 3189 | |
9e062b6c RS |
3190 | /* Recurse according to subtree's type. |
3191 | Every branch must return a Lisp_Object. */ | |
3192 | switch (XTYPE (subtree)) | |
3193 | { | |
3194 | case Lisp_Vectorlike: | |
3195 | { | |
82cb60d3 | 3196 | ptrdiff_t i, length = 0; |
7a3d90dc SM |
3197 | if (BOOL_VECTOR_P (subtree)) |
3198 | return subtree; /* No sub-objects anyway. */ | |
3199 | else if (CHAR_TABLE_P (subtree) || SUB_CHAR_TABLE_P (subtree) | |
3200 | || COMPILEDP (subtree)) | |
3201 | length = ASIZE (subtree) & PSEUDOVECTOR_SIZE_MASK; | |
3202 | else if (VECTORP (subtree)) | |
3203 | length = ASIZE (subtree); | |
3204 | else | |
3205 | /* An unknown pseudovector may contain non-Lisp fields, so we | |
3206 | can't just blindly traverse all its fields. We used to call | |
04bf5b65 | 3207 | `Flength' which signaled `sequencep', so I just preserved this |
7a3d90dc SM |
3208 | behavior. */ |
3209 | wrong_type_argument (Qsequencep, subtree); | |
3210 | ||
9e062b6c | 3211 | for (i = 0; i < length; i++) |
7a3d90dc SM |
3212 | SUBSTITUTE (AREF (subtree, i), |
3213 | ASET (subtree, i, true_value)); | |
9e062b6c RS |
3214 | return subtree; |
3215 | } | |
3216 | ||
3217 | case Lisp_Cons: | |
3218 | { | |
7a3d90dc SM |
3219 | SUBSTITUTE (XCAR (subtree), |
3220 | XSETCAR (subtree, true_value)); | |
3221 | SUBSTITUTE (XCDR (subtree), | |
3222 | XSETCDR (subtree, true_value)); | |
9e062b6c RS |
3223 | return subtree; |
3224 | } | |
3225 | ||
9e062b6c RS |
3226 | case Lisp_String: |
3227 | { | |
3228 | /* Check for text properties in each interval. | |
e61b9b87 | 3229 | substitute_in_interval contains part of the logic. */ |
9e062b6c | 3230 | |
d5db4077 | 3231 | INTERVAL root_interval = STRING_INTERVALS (subtree); |
9e062b6c | 3232 | Lisp_Object arg = Fcons (object, placeholder); |
177c0ea7 | 3233 | |
0d74b006 SM |
3234 | traverse_intervals_noorder (root_interval, |
3235 | &substitute_in_interval, arg); | |
9e062b6c RS |
3236 | |
3237 | return subtree; | |
3238 | } | |
9e062b6c RS |
3239 | |
3240 | /* Other types don't recurse any further. */ | |
3241 | default: | |
3242 | return subtree; | |
3243 | } | |
3244 | } | |
3245 | ||
3246 | /* Helper function for substitute_object_recurse. */ | |
3247 | static void | |
971de7fb | 3248 | substitute_in_interval (INTERVAL interval, Lisp_Object arg) |
9e062b6c RS |
3249 | { |
3250 | Lisp_Object object = Fcar (arg); | |
3251 | Lisp_Object placeholder = Fcdr (arg); | |
3252 | ||
9735b9ce | 3253 | SUBSTITUTE (interval->plist, interval->plist = true_value); |
9e062b6c RS |
3254 | } |
3255 | ||
3256 | \f | |
078e7b4a JB |
3257 | #define LEAD_INT 1 |
3258 | #define DOT_CHAR 2 | |
3259 | #define TRAIL_INT 4 | |
452f4150 | 3260 | #define E_EXP 16 |
078e7b4a | 3261 | |
8b9587d7 | 3262 | |
452f4150 PE |
3263 | /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has |
3264 | integer syntax and fits in a fixnum, else return the nearest float if CP has | |
3265 | either floating point or integer syntax and BASE is 10, else return nil. If | |
3266 | IGNORE_TRAILING is nonzero, consider just the longest prefix of CP that has | |
3267 | valid floating point syntax. Signal an overflow if BASE is not 10 and the | |
3268 | number has integer syntax but does not fit. */ | |
8b9587d7 PE |
3269 | |
3270 | Lisp_Object | |
452f4150 | 3271 | string_to_number (char const *string, int base, int ignore_trailing) |
078e7b4a | 3272 | { |
a8fe7202 | 3273 | int state; |
452f4150 PE |
3274 | char const *cp = string; |
3275 | int leading_digit; | |
3276 | int float_syntax = 0; | |
3277 | double value = 0; | |
d8578e58 | 3278 | |
8b9587d7 PE |
3279 | /* Compute NaN and infinities using a variable, to cope with compilers that |
3280 | think they are smarter than we are. */ | |
3281 | double zero = 0; | |
3282 | ||
3283 | /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on | |
3284 | IEEE floating point hosts, and works around a formerly-common bug where | |
3285 | atof ("-0.0") drops the sign. */ | |
3286 | int negative = *cp == '-'; | |
3287 | ||
452f4150 PE |
3288 | int signedp = negative || *cp == '+'; |
3289 | cp += signedp; | |
8b9587d7 | 3290 | |
078e7b4a | 3291 | state = 0; |
078e7b4a | 3292 | |
452f4150 PE |
3293 | leading_digit = digit_to_number (*cp, base); |
3294 | if (0 <= leading_digit) | |
078e7b4a JB |
3295 | { |
3296 | state |= LEAD_INT; | |
452f4150 PE |
3297 | do |
3298 | ++cp; | |
3299 | while (0 <= digit_to_number (*cp, base)); | |
078e7b4a JB |
3300 | } |
3301 | if (*cp == '.') | |
3302 | { | |
3303 | state |= DOT_CHAR; | |
3304 | cp++; | |
3305 | } | |
078e7b4a | 3306 | |
452f4150 | 3307 | if (base == 10) |
eb659c41 | 3308 | { |
452f4150 PE |
3309 | if ('0' <= *cp && *cp <= '9') |
3310 | { | |
3311 | state |= TRAIL_INT; | |
3312 | do | |
3313 | cp++; | |
3314 | while ('0' <= *cp && *cp <= '9'); | |
3315 | } | |
3316 | if (*cp == 'e' || *cp == 'E') | |
3317 | { | |
3318 | char const *ecp = cp; | |
3319 | cp++; | |
3320 | if (*cp == '+' || *cp == '-') | |
3321 | cp++; | |
3322 | if ('0' <= *cp && *cp <= '9') | |
3323 | { | |
3324 | state |= E_EXP; | |
3325 | do | |
3326 | cp++; | |
3327 | while ('0' <= *cp && *cp <= '9'); | |
3328 | } | |
3329 | else if (cp[-1] == '+' | |
3330 | && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') | |
3331 | { | |
3332 | state |= E_EXP; | |
3333 | cp += 3; | |
3334 | value = 1.0 / zero; | |
3335 | } | |
3336 | else if (cp[-1] == '+' | |
3337 | && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
3338 | { | |
3339 | state |= E_EXP; | |
3340 | cp += 3; | |
3341 | value = zero / zero; | |
3342 | ||
3343 | /* If that made a "negative" NaN, negate it. */ | |
3344 | { | |
3345 | int i; | |
3346 | union { double d; char c[sizeof (double)]; } | |
3347 | u_data, u_minus_zero; | |
3348 | u_data.d = value; | |
3349 | u_minus_zero.d = -0.0; | |
3350 | for (i = 0; i < sizeof (double); i++) | |
3351 | if (u_data.c[i] & u_minus_zero.c[i]) | |
3352 | { | |
3353 | value = -value; | |
3354 | break; | |
3355 | } | |
3356 | } | |
3357 | /* Now VALUE is a positive NaN. */ | |
3358 | } | |
3359 | else | |
3360 | cp = ecp; | |
3361 | } | |
3362 | ||
3363 | float_syntax = ((state & (DOT_CHAR|TRAIL_INT)) == (DOT_CHAR|TRAIL_INT) | |
3364 | || state == (LEAD_INT|E_EXP)); | |
eb659c41 | 3365 | } |
8b9587d7 | 3366 | |
452f4150 PE |
3367 | /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept |
3368 | any prefix that matches. Otherwise, the entire string must match. */ | |
3369 | if (! (ignore_trailing | |
3370 | ? ((state & LEAD_INT) != 0 || float_syntax) | |
3371 | : (!*cp && ((state & ~DOT_CHAR) == LEAD_INT || float_syntax)))) | |
3372 | return Qnil; | |
8b9587d7 | 3373 | |
d78050d6 PE |
3374 | /* If the number uses integer and not float syntax, and is in C-language |
3375 | range, use its value, preferably as a fixnum. */ | |
452f4150 PE |
3376 | if (0 <= leading_digit && ! float_syntax) |
3377 | { | |
d78050d6 PE |
3378 | uintmax_t n; |
3379 | ||
3380 | /* Fast special case for single-digit integers. This also avoids a | |
3381 | glitch when BASE is 16 and IGNORE_TRAILING is nonzero, because in that | |
3382 | case some versions of strtoumax accept numbers like "0x1" that Emacs | |
3383 | does not allow. */ | |
3384 | if (digit_to_number (string[signedp + 1], base) < 0) | |
3385 | return make_number (negative ? -leading_digit : leading_digit); | |
3386 | ||
3387 | errno = 0; | |
3388 | n = strtoumax (string + signedp, NULL, base); | |
3389 | if (errno == ERANGE) | |
452f4150 | 3390 | { |
d78050d6 PE |
3391 | /* Unfortunately there's no simple and accurate way to convert |
3392 | non-base-10 numbers that are out of C-language range. */ | |
3393 | if (base != 10) | |
f14ed477 | 3394 | xsignal1 (Qoverflow_error, build_string (string)); |
452f4150 | 3395 | } |
d78050d6 PE |
3396 | else if (n <= (negative ? -MOST_NEGATIVE_FIXNUM : MOST_POSITIVE_FIXNUM)) |
3397 | { | |
3398 | EMACS_INT signed_n = n; | |
3399 | return make_number (negative ? -signed_n : signed_n); | |
3400 | } | |
3401 | else | |
3402 | value = n; | |
452f4150 | 3403 | } |
8b9587d7 | 3404 | |
452f4150 PE |
3405 | /* Either the number uses float syntax, or it does not fit into a fixnum. |
3406 | Convert it from string to floating point, unless the value is already | |
d78050d6 PE |
3407 | known because it is an infinity, a NAN, or its absolute value fits in |
3408 | uintmax_t. */ | |
8b9587d7 | 3409 | if (! value) |
452f4150 PE |
3410 | value = atof (string + signedp); |
3411 | ||
d78050d6 | 3412 | return make_float (negative ? -value : value); |
078e7b4a | 3413 | } |
cc94f3b2 | 3414 | |
078e7b4a JB |
3415 | \f |
3416 | static Lisp_Object | |
876c194c | 3417 | read_vector (Lisp_Object readcharfun, int bytecodeflag) |
078e7b4a | 3418 | { |
82cb60d3 | 3419 | ptrdiff_t i, size; |
078e7b4a | 3420 | register Lisp_Object *ptr; |
c15cfd1f | 3421 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
3422 | register struct Lisp_Cons *otem; |
3423 | Lisp_Object len; | |
3424 | ||
3425 | tem = read_list (1, readcharfun); | |
3426 | len = Flength (tem); | |
3427 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
3428 | ||
77b37c05 | 3429 | size = ASIZE (vector); |
078e7b4a JB |
3430 | ptr = XVECTOR (vector)->contents; |
3431 | for (i = 0; i < size; i++) | |
3432 | { | |
c15cfd1f RS |
3433 | item = Fcar (tem); |
3434 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
3435 | bytecode object, the docstring containing the bytecode and | |
3436 | constants values must be treated as unibyte and passed to | |
3437 | Fread, to get the actual bytecode string and constants vector. */ | |
876c194c | 3438 | if (bytecodeflag && load_force_doc_strings) |
c15cfd1f RS |
3439 | { |
3440 | if (i == COMPILED_BYTECODE) | |
3441 | { | |
3442 | if (!STRINGP (item)) | |
6fa2b890 | 3443 | error ("Invalid byte code"); |
c15cfd1f RS |
3444 | |
3445 | /* Delay handling the bytecode slot until we know whether | |
3446 | it is lazily-loaded (we can tell by whether the | |
3447 | constants slot is nil). */ | |
3448 | ptr[COMPILED_CONSTANTS] = item; | |
3449 | item = Qnil; | |
3450 | } | |
3451 | else if (i == COMPILED_CONSTANTS) | |
3452 | { | |
3453 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
3454 | ||
3455 | if (NILP (item)) | |
3456 | { | |
3457 | /* Coerce string to unibyte (like string-as-unibyte, | |
3458 | but without generating extra garbage and | |
3459 | guaranteeing no change in the contents). */ | |
bee91904 | 3460 | STRING_SET_CHARS (bytestr, SBYTES (bytestr)); |
d5db4077 | 3461 | STRING_SET_UNIBYTE (bytestr); |
c15cfd1f | 3462 | |
8792be66 | 3463 | item = Fread (Fcons (bytestr, readcharfun)); |
c15cfd1f | 3464 | if (!CONSP (item)) |
6fa2b890 | 3465 | error ("Invalid byte code"); |
c15cfd1f RS |
3466 | |
3467 | otem = XCONS (item); | |
c1d497be KR |
3468 | bytestr = XCAR (item); |
3469 | item = XCDR (item); | |
c15cfd1f RS |
3470 | free_cons (otem); |
3471 | } | |
3472 | ||
3473 | /* Now handle the bytecode slot. */ | |
3474 | ptr[COMPILED_BYTECODE] = read_pure ? Fpurecopy (bytestr) : bytestr; | |
3475 | } | |
8792be66 KH |
3476 | else if (i == COMPILED_DOC_STRING |
3477 | && STRINGP (item) | |
3478 | && ! STRING_MULTIBYTE (item)) | |
3479 | { | |
3480 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) | |
3481 | item = Fdecode_coding_string (item, Qemacs_mule, Qnil, Qnil); | |
3482 | else | |
3483 | item = Fstring_as_multibyte (item); | |
3484 | } | |
c15cfd1f RS |
3485 | } |
3486 | ptr[i] = read_pure ? Fpurecopy (item) : item; | |
078e7b4a JB |
3487 | otem = XCONS (tem); |
3488 | tem = Fcdr (tem); | |
3489 | free_cons (otem); | |
3490 | } | |
3491 | return vector; | |
3492 | } | |
177c0ea7 | 3493 | |
6f7f43d5 RS |
3494 | /* FLAG = 1 means check for ] to terminate rather than ) and . |
3495 | FLAG = -1 means check for starting with defun | |
078e7b4a JB |
3496 | and make structure pure. */ |
3497 | ||
3498 | static Lisp_Object | |
971de7fb | 3499 | read_list (int flag, register Lisp_Object readcharfun) |
078e7b4a JB |
3500 | { |
3501 | /* -1 means check next element for defun, | |
3502 | 0 means don't check, | |
3503 | 1 means already checked and found defun. */ | |
3504 | int defunflag = flag < 0 ? -1 : 0; | |
3505 | Lisp_Object val, tail; | |
3506 | register Lisp_Object elt, tem; | |
3507 | struct gcpro gcpro1, gcpro2; | |
821d417e | 3508 | /* 0 is the normal case. |
b2a30870 | 3509 | 1 means this list is a doc reference; replace it with the number 0. |
177c0ea7 | 3510 | 2 means this list is a doc reference; replace it with the doc string. */ |
821d417e | 3511 | int doc_reference = 0; |
078e7b4a | 3512 | |
17634846 RS |
3513 | /* Initialize this to 1 if we are reading a list. */ |
3514 | int first_in_list = flag <= 0; | |
3515 | ||
078e7b4a JB |
3516 | val = Qnil; |
3517 | tail = Qnil; | |
3518 | ||
3519 | while (1) | |
3520 | { | |
e28552a4 | 3521 | int ch; |
078e7b4a | 3522 | GCPRO2 (val, tail); |
17634846 | 3523 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 3524 | UNGCPRO; |
20ea2964 | 3525 | |
17634846 RS |
3526 | first_in_list = 0; |
3527 | ||
821d417e | 3528 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 3529 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 3530 | && ! NILP (elt) |
821d417e RS |
3531 | && !NILP (Vpurify_flag)) |
3532 | { | |
3533 | if (NILP (Vdoc_file_name)) | |
3534 | /* We have not yet called Snarf-documentation, so assume | |
3535 | this file is described in the DOC-MM.NN file | |
3536 | and Snarf-documentation will fill in the right value later. | |
3537 | For now, replace the whole list with 0. */ | |
3538 | doc_reference = 1; | |
3539 | else | |
3540 | /* We have already called Snarf-documentation, so make a relative | |
3541 | file name for this file, so it can be found properly | |
3542 | in the installed Lisp directory. | |
3543 | We don't use Fexpand_file_name because that would make | |
3544 | the directory absolute now. */ | |
3545 | elt = concat2 (build_string ("../lisp/"), | |
3546 | Ffile_name_nondirectory (elt)); | |
3547 | } | |
b2a30870 | 3548 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 3549 | && ! NILP (elt) |
b2a30870 RS |
3550 | && load_force_doc_strings) |
3551 | doc_reference = 2; | |
20ea2964 | 3552 | |
6428369f | 3553 | if (ch) |
078e7b4a JB |
3554 | { |
3555 | if (flag > 0) | |
3556 | { | |
6428369f | 3557 | if (ch == ']') |
078e7b4a | 3558 | return val; |
e4d29b33 | 3559 | invalid_syntax (") or . in a vector"); |
078e7b4a | 3560 | } |
6428369f | 3561 | if (ch == ')') |
078e7b4a | 3562 | return val; |
6428369f | 3563 | if (ch == '.') |
078e7b4a JB |
3564 | { |
3565 | GCPRO2 (val, tail); | |
265a9e55 | 3566 | if (!NILP (tail)) |
f5df591a | 3567 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
3568 | else |
3569 | val = read0 (readcharfun); | |
17634846 | 3570 | read1 (readcharfun, &ch, 0); |
078e7b4a | 3571 | UNGCPRO; |
6428369f | 3572 | if (ch == ')') |
821d417e RS |
3573 | { |
3574 | if (doc_reference == 1) | |
3575 | return make_number (0); | |
b2a30870 RS |
3576 | if (doc_reference == 2) |
3577 | { | |
3578 | /* Get a doc string from the file we are loading. | |
8792be66 KH |
3579 | If it's in saved_doc_string, get it from there. |
3580 | ||
3581 | Here, we don't know if the string is a | |
3582 | bytecode string or a doc string. As a | |
3583 | bytecode string must be unibyte, we always | |
3584 | return a unibyte string. If it is actually a | |
3585 | doc string, caller must make it | |
3586 | multibyte. */ | |
8f924df7 | 3587 | |
bfbbd7e7 | 3588 | EMACS_INT pos = XINT (XCDR (val)); |
c15cfd1f RS |
3589 | /* Position is negative for user variables. */ |
3590 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
3591 | if (pos >= saved_doc_string_position |
3592 | && pos < (saved_doc_string_position | |
3593 | + saved_doc_string_length)) | |
3594 | { | |
82cb60d3 PE |
3595 | ptrdiff_t start = pos - saved_doc_string_position; |
3596 | ptrdiff_t from, to; | |
b2a30870 RS |
3597 | |
3598 | /* Process quoting with ^A, | |
3599 | and find the end of the string, | |
3600 | which is marked with ^_ (037). */ | |
3601 | for (from = start, to = start; | |
3602 | saved_doc_string[from] != 037;) | |
3603 | { | |
3604 | int c = saved_doc_string[from++]; | |
3605 | if (c == 1) | |
3606 | { | |
3607 | c = saved_doc_string[from++]; | |
3608 | if (c == 1) | |
3609 | saved_doc_string[to++] = c; | |
3610 | else if (c == '0') | |
3611 | saved_doc_string[to++] = 0; | |
3612 | else if (c == '_') | |
3613 | saved_doc_string[to++] = 037; | |
3614 | } | |
3615 | else | |
3616 | saved_doc_string[to++] = c; | |
3617 | } | |
3618 | ||
8792be66 KH |
3619 | return make_unibyte_string (saved_doc_string + start, |
3620 | to - start); | |
b2a30870 | 3621 | } |
c15cfd1f RS |
3622 | /* Look in prev_saved_doc_string the same way. */ |
3623 | else if (pos >= prev_saved_doc_string_position | |
3624 | && pos < (prev_saved_doc_string_position | |
3625 | + prev_saved_doc_string_length)) | |
3626 | { | |
82cb60d3 PE |
3627 | ptrdiff_t start = |
3628 | pos - prev_saved_doc_string_position; | |
3629 | ptrdiff_t from, to; | |
c15cfd1f RS |
3630 | |
3631 | /* Process quoting with ^A, | |
3632 | and find the end of the string, | |
3633 | which is marked with ^_ (037). */ | |
3634 | for (from = start, to = start; | |
3635 | prev_saved_doc_string[from] != 037;) | |
3636 | { | |
3637 | int c = prev_saved_doc_string[from++]; | |
3638 | if (c == 1) | |
3639 | { | |
3640 | c = prev_saved_doc_string[from++]; | |
3641 | if (c == 1) | |
3642 | prev_saved_doc_string[to++] = c; | |
3643 | else if (c == '0') | |
3644 | prev_saved_doc_string[to++] = 0; | |
3645 | else if (c == '_') | |
3646 | prev_saved_doc_string[to++] = 037; | |
3647 | } | |
3648 | else | |
3649 | prev_saved_doc_string[to++] = c; | |
3650 | } | |
3651 | ||
8792be66 KH |
3652 | return make_unibyte_string (prev_saved_doc_string |
3653 | + start, | |
3654 | to - start); | |
c15cfd1f | 3655 | } |
b2a30870 | 3656 | else |
8792be66 | 3657 | return get_doc_string (val, 1, 0); |
b2a30870 RS |
3658 | } |
3659 | ||
821d417e RS |
3660 | return val; |
3661 | } | |
e4d29b33 | 3662 | invalid_syntax (". in wrong context"); |
078e7b4a | 3663 | } |
e4d29b33 | 3664 | invalid_syntax ("] in a list"); |
078e7b4a JB |
3665 | } |
3666 | tem = (read_pure && flag <= 0 | |
3667 | ? pure_cons (elt, Qnil) | |
3668 | : Fcons (elt, Qnil)); | |
265a9e55 | 3669 | if (!NILP (tail)) |
f5df591a | 3670 | XSETCDR (tail, tem); |
078e7b4a JB |
3671 | else |
3672 | val = tem; | |
3673 | tail = tem; | |
3674 | if (defunflag < 0) | |
3675 | defunflag = EQ (elt, Qdefun); | |
3676 | else if (defunflag > 0) | |
3677 | read_pure = 1; | |
3678 | } | |
3679 | } | |
3680 | \f | |
1e3890d1 | 3681 | static Lisp_Object initial_obarray; |
078e7b4a | 3682 | |
d007f5c8 RS |
3683 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
3684 | ||
2f30ecd0 | 3685 | static size_t oblookup_last_bucket_number; |
d007f5c8 | 3686 | |
d007f5c8 RS |
3687 | /* Get an error if OBARRAY is not an obarray. |
3688 | If it is one, return it. */ | |
3689 | ||
078e7b4a | 3690 | Lisp_Object |
971de7fb | 3691 | check_obarray (Lisp_Object obarray) |
078e7b4a | 3692 | { |
77b37c05 | 3693 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a JB |
3694 | { |
3695 | /* If Vobarray is now invalid, force it to be valid. */ | |
3696 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
8878319c | 3697 | wrong_type_argument (Qvectorp, obarray); |
078e7b4a JB |
3698 | } |
3699 | return obarray; | |
3700 | } | |
3701 | ||
d007f5c8 RS |
3702 | /* Intern the C string STR: return a symbol with that name, |
3703 | interned in the current obarray. */ | |
078e7b4a JB |
3704 | |
3705 | Lisp_Object | |
971de7fb | 3706 | intern (const char *str) |
078e7b4a JB |
3707 | { |
3708 | Lisp_Object tem; | |
6e5bb2dc | 3709 | ptrdiff_t len = strlen (str); |
153a17b7 | 3710 | Lisp_Object obarray; |
078e7b4a | 3711 | |
153a17b7 | 3712 | obarray = Vobarray; |
77b37c05 | 3713 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a | 3714 | obarray = check_obarray (obarray); |
e28552a4 | 3715 | tem = oblookup (obarray, str, len, len); |
cfff016d | 3716 | if (SYMBOLP (tem)) |
078e7b4a | 3717 | return tem; |
87631ef7 | 3718 | return Fintern (make_string (str, len), obarray); |
078e7b4a | 3719 | } |
4ad679f9 | 3720 | |
5e2327cf DN |
3721 | Lisp_Object |
3722 | intern_c_string (const char *str) | |
3723 | { | |
3724 | Lisp_Object tem; | |
6e5bb2dc | 3725 | ptrdiff_t len = strlen (str); |
5e2327cf DN |
3726 | Lisp_Object obarray; |
3727 | ||
3728 | obarray = Vobarray; | |
77b37c05 | 3729 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
5e2327cf DN |
3730 | obarray = check_obarray (obarray); |
3731 | tem = oblookup (obarray, str, len, len); | |
3732 | if (SYMBOLP (tem)) | |
3733 | return tem; | |
3734 | ||
3735 | if (NILP (Vpurify_flag)) | |
3736 | /* Creating a non-pure string from a string literal not | |
3737 | implemented yet. We could just use make_string here and live | |
3738 | with the extra copy. */ | |
3739 | abort (); | |
3740 | ||
3741 | return Fintern (make_pure_c_string (str), obarray); | |
3742 | } | |
d007f5c8 | 3743 | \f |
a7ca3326 | 3744 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
3745 | doc: /* Return the canonical symbol whose name is STRING. |
3746 | If there is none, one is created by this function and returned. | |
3747 | A second optional argument specifies the obarray to use; | |
3748 | it defaults to the value of `obarray'. */) | |
5842a27b | 3749 | (Lisp_Object string, Lisp_Object obarray) |
078e7b4a JB |
3750 | { |
3751 | register Lisp_Object tem, sym, *ptr; | |
3752 | ||
265a9e55 | 3753 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3754 | obarray = check_obarray (obarray); |
3755 | ||
b7826503 | 3756 | CHECK_STRING (string); |
078e7b4a | 3757 | |
42a5b22f | 3758 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3759 | SCHARS (string), |
3760 | SBYTES (string)); | |
cfff016d | 3761 | if (!INTEGERP (tem)) |
078e7b4a JB |
3762 | return tem; |
3763 | ||
265a9e55 | 3764 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
3765 | string = Fpurecopy (string); |
3766 | sym = Fmake_symbol (string); | |
44c6c019 GM |
3767 | |
3768 | if (EQ (obarray, initial_obarray)) | |
3769 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
3770 | else | |
3771 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 3772 | |
d5db4077 | 3773 | if ((SREF (string, 0) == ':') |
a458d45d | 3774 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
3775 | { |
3776 | XSYMBOL (sym)->constant = 1; | |
ce5b453a SM |
3777 | XSYMBOL (sym)->redirect = SYMBOL_PLAINVAL; |
3778 | SET_SYMBOL_VAL (XSYMBOL (sym), sym); | |
44c6c019 | 3779 | } |
a0549832 | 3780 | |
078e7b4a | 3781 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
cfff016d | 3782 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
3783 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
3784 | else | |
3785 | XSYMBOL (sym)->next = 0; | |
3786 | *ptr = sym; | |
3787 | return sym; | |
3788 | } | |
3789 | ||
a7ca3326 | 3790 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, |
5de38842 PJ |
3791 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3792 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3793 | symbol is searched for. | |
3794 | A second optional argument specifies the obarray to use; | |
3795 | it defaults to the value of `obarray'. */) | |
5842a27b | 3796 | (Lisp_Object name, Lisp_Object obarray) |
078e7b4a | 3797 | { |
c2d47f4b | 3798 | register Lisp_Object tem, string; |
078e7b4a | 3799 | |
265a9e55 | 3800 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3801 | obarray = check_obarray (obarray); |
3802 | ||
b55048d4 GM |
3803 | if (!SYMBOLP (name)) |
3804 | { | |
b7826503 | 3805 | CHECK_STRING (name); |
c2d47f4b | 3806 | string = name; |
b55048d4 GM |
3807 | } |
3808 | else | |
c2d47f4b | 3809 | string = SYMBOL_NAME (name); |
078e7b4a | 3810 | |
42a5b22f | 3811 | tem = oblookup (obarray, SSDATA (string), SCHARS (string), SBYTES (string)); |
b55048d4 GM |
3812 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
3813 | return Qnil; | |
3814 | else | |
078e7b4a | 3815 | return tem; |
078e7b4a | 3816 | } |
d007f5c8 | 3817 | \f |
a7ca3326 | 3818 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, |
5de38842 PJ |
3819 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3820 | The value is t if a symbol was found and deleted, nil otherwise. | |
3821 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3822 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3823 | OBARRAY defaults to the value of the variable `obarray'. */) | |
5842a27b | 3824 | (Lisp_Object name, Lisp_Object obarray) |
d007f5c8 RS |
3825 | { |
3826 | register Lisp_Object string, tem; | |
2f30ecd0 | 3827 | size_t hash; |
d007f5c8 RS |
3828 | |
3829 | if (NILP (obarray)) obarray = Vobarray; | |
3830 | obarray = check_obarray (obarray); | |
3831 | ||
3832 | if (SYMBOLP (name)) | |
d4c83cae | 3833 | string = SYMBOL_NAME (name); |
d007f5c8 RS |
3834 | else |
3835 | { | |
b7826503 | 3836 | CHECK_STRING (name); |
d007f5c8 RS |
3837 | string = name; |
3838 | } | |
3839 | ||
42a5b22f | 3840 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3841 | SCHARS (string), |
3842 | SBYTES (string)); | |
d007f5c8 RS |
3843 | if (INTEGERP (tem)) |
3844 | return Qnil; | |
3845 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3846 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3847 | return Qnil; | |
3848 | ||
8ab1650e SM |
3849 | /* There are plenty of other symbols which will screw up the Emacs |
3850 | session if we unintern them, as well as even more ways to use | |
3851 | `setq' or `fset' or whatnot to make the Emacs session | |
3852 | unusable. Let's not go down this silly road. --Stef */ | |
3853 | /* if (EQ (tem, Qnil) || EQ (tem, Qt)) | |
3854 | error ("Attempt to unintern t or nil"); */ | |
82c602f0 | 3855 | |
44c6c019 | 3856 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
ca69c42f | 3857 | |
d007f5c8 RS |
3858 | hash = oblookup_last_bucket_number; |
3859 | ||
3860 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
3861 | { |
3862 | if (XSYMBOL (tem)->next) | |
3863 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
3864 | else | |
3865 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
3866 | } | |
d007f5c8 RS |
3867 | else |
3868 | { | |
3869 | Lisp_Object tail, following; | |
3870 | ||
3871 | for (tail = XVECTOR (obarray)->contents[hash]; | |
3872 | XSYMBOL (tail)->next; | |
3873 | tail = following) | |
3874 | { | |
3875 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3876 | if (EQ (following, tem)) | |
3877 | { | |
3878 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
3879 | break; | |
3880 | } | |
3881 | } | |
3882 | } | |
3883 | ||
3884 | return Qt; | |
3885 | } | |
3886 | \f | |
3887 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3888 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3889 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3890 | |
3891 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3892 | |
3893 | Lisp_Object | |
d311d28c | 3894 | oblookup (Lisp_Object obarray, register const char *ptr, ptrdiff_t size, ptrdiff_t size_byte) |
078e7b4a | 3895 | { |
2f30ecd0 PE |
3896 | size_t hash; |
3897 | size_t obsize; | |
078e7b4a JB |
3898 | register Lisp_Object tail; |
3899 | Lisp_Object bucket, tem; | |
3900 | ||
cfff016d | 3901 | if (!VECTORP (obarray) |
77b37c05 | 3902 | || (obsize = ASIZE (obarray)) == 0) |
078e7b4a JB |
3903 | { |
3904 | obarray = check_obarray (obarray); | |
77b37c05 | 3905 | obsize = ASIZE (obarray); |
078e7b4a | 3906 | } |
519418b3 RS |
3907 | /* This is sometimes needed in the middle of GC. */ |
3908 | obsize &= ~ARRAY_MARK_FLAG; | |
7c2fb837 | 3909 | hash = hash_string (ptr, size_byte) % obsize; |
078e7b4a | 3910 | bucket = XVECTOR (obarray)->contents[hash]; |
d007f5c8 | 3911 | oblookup_last_bucket_number = hash; |
8bc285a2 | 3912 | if (EQ (bucket, make_number (0))) |
078e7b4a | 3913 | ; |
cfff016d | 3914 | else if (!SYMBOLP (bucket)) |
078e7b4a | 3915 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
3916 | else |
3917 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3918 | { |
d5db4077 KR |
3919 | if (SBYTES (SYMBOL_NAME (tail)) == size_byte |
3920 | && SCHARS (SYMBOL_NAME (tail)) == size | |
72af86bd | 3921 | && !memcmp (SDATA (SYMBOL_NAME (tail)), ptr, size_byte)) |
078e7b4a JB |
3922 | return tail; |
3923 | else if (XSYMBOL (tail)->next == 0) | |
3924 | break; | |
3925 | } | |
1805de4f | 3926 | XSETINT (tem, hash); |
078e7b4a JB |
3927 | return tem; |
3928 | } | |
d007f5c8 | 3929 | \f |
078e7b4a | 3930 | void |
971de7fb | 3931 | map_obarray (Lisp_Object obarray, void (*fn) (Lisp_Object, Lisp_Object), Lisp_Object arg) |
078e7b4a | 3932 | { |
82cb60d3 | 3933 | ptrdiff_t i; |
078e7b4a | 3934 | register Lisp_Object tail; |
b7826503 | 3935 | CHECK_VECTOR (obarray); |
77b37c05 | 3936 | for (i = ASIZE (obarray) - 1; i >= 0; i--) |
078e7b4a JB |
3937 | { |
3938 | tail = XVECTOR (obarray)->contents[i]; | |
4f5c4403 | 3939 | if (SYMBOLP (tail)) |
078e7b4a JB |
3940 | while (1) |
3941 | { | |
3942 | (*fn) (tail, arg); | |
3943 | if (XSYMBOL (tail)->next == 0) | |
3944 | break; | |
1805de4f | 3945 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3946 | } |
3947 | } | |
3948 | } | |
3949 | ||
7d383292 | 3950 | static void |
971de7fb | 3951 | mapatoms_1 (Lisp_Object sym, Lisp_Object function) |
078e7b4a JB |
3952 | { |
3953 | call1 (function, sym); | |
3954 | } | |
3955 | ||
3956 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3957 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3958 | OBARRAY defaults to the value of `obarray'. */) | |
5842a27b | 3959 | (Lisp_Object function, Lisp_Object obarray) |
078e7b4a | 3960 | { |
265a9e55 | 3961 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3962 | obarray = check_obarray (obarray); |
3963 | ||
3964 | map_obarray (obarray, mapatoms_1, function); | |
3965 | return Qnil; | |
3966 | } | |
3967 | ||
5e88a39e | 3968 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3969 | |
3970 | void | |
971de7fb | 3971 | init_obarray (void) |
078e7b4a JB |
3972 | { |
3973 | Lisp_Object oblength; | |
37d0112b | 3974 | ptrdiff_t size = 100 + MAX_MULTIBYTE_LENGTH; |
078e7b4a | 3975 | |
baf69866 | 3976 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3977 | |
078e7b4a JB |
3978 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3979 | initial_obarray = Vobarray; | |
3980 | staticpro (&initial_obarray); | |
078e7b4a | 3981 | |
d67b4f80 | 3982 | Qunbound = Fmake_symbol (make_pure_c_string ("unbound")); |
ce5b453a SM |
3983 | /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the |
3984 | NILP (Vpurify_flag) check in intern_c_string. */ | |
3985 | Qnil = make_number (-1); Vpurify_flag = make_number (1); | |
3986 | Qnil = intern_c_string ("nil"); | |
3987 | ||
3988 | /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil, | |
3989 | so those two need to be fixed manally. */ | |
3990 | SET_SYMBOL_VAL (XSYMBOL (Qunbound), Qunbound); | |
078e7b4a | 3991 | XSYMBOL (Qunbound)->function = Qunbound; |
ce5b453a SM |
3992 | XSYMBOL (Qunbound)->plist = Qnil; |
3993 | /* XSYMBOL (Qnil)->function = Qunbound; */ | |
3994 | SET_SYMBOL_VAL (XSYMBOL (Qnil), Qnil); | |
3995 | XSYMBOL (Qnil)->constant = 1; | |
3996 | XSYMBOL (Qnil)->plist = Qnil; | |
078e7b4a | 3997 | |
d67b4f80 | 3998 | Qt = intern_c_string ("t"); |
ce5b453a | 3999 | SET_SYMBOL_VAL (XSYMBOL (Qt), Qt); |
44c6c019 | 4000 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
4001 | |
4002 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
4003 | Vpurify_flag = Qt; | |
4004 | ||
cd3520a4 | 4005 | DEFSYM (Qvariable_documentation, "variable-documentation"); |
078e7b4a | 4006 | |
37d0112b PE |
4007 | read_buffer = (char *) xmalloc (size); |
4008 | read_buffer_size = size; | |
078e7b4a JB |
4009 | } |
4010 | \f | |
4011 | void | |
971de7fb | 4012 | defsubr (struct Lisp_Subr *sname) |
078e7b4a JB |
4013 | { |
4014 | Lisp_Object sym; | |
d67b4f80 | 4015 | sym = intern_c_string (sname->symbol_name); |
eab3844f | 4016 | XSETTYPED_PVECTYPE (sname, size, PVEC_SUBR); |
1805de4f | 4017 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
4018 | } |
4019 | ||
4020 | #ifdef NOTDEF /* use fset in subr.el now */ | |
4021 | void | |
1dae0f0a | 4022 | defalias (struct Lisp_Subr *sname, char *string) |
078e7b4a JB |
4023 | { |
4024 | Lisp_Object sym; | |
4025 | sym = intern (string); | |
1805de4f | 4026 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
4027 | } |
4028 | #endif /* NOTDEF */ | |
4029 | ||
039c6cc3 | 4030 | /* Define an "integer variable"; a symbol whose value is forwarded to a |
82cb60d3 | 4031 | C variable of type EMACS_INT. Sample call (with "xx" to fool make-docfile): |
039c6cc3 | 4032 | DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */ |
078e7b4a | 4033 | void |
ce5b453a SM |
4034 | defvar_int (struct Lisp_Intfwd *i_fwd, |
4035 | const char *namestring, EMACS_INT *address) | |
078e7b4a | 4036 | { |
ce5b453a | 4037 | Lisp_Object sym; |
5e2327cf | 4038 | sym = intern_c_string (namestring); |
ce5b453a SM |
4039 | i_fwd->type = Lisp_Fwd_Int; |
4040 | i_fwd->intvar = address; | |
b9598260 | 4041 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4042 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4043 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)i_fwd); | |
078e7b4a JB |
4044 | } |
4045 | ||
f0529b5b | 4046 | /* Similar but define a variable whose value is t if address contains 1, |
0f011df0 | 4047 | nil if address contains 0. */ |
078e7b4a | 4048 | void |
ce5b453a SM |
4049 | defvar_bool (struct Lisp_Boolfwd *b_fwd, |
4050 | const char *namestring, int *address) | |
078e7b4a | 4051 | { |
ce5b453a | 4052 | Lisp_Object sym; |
5e2327cf | 4053 | sym = intern_c_string (namestring); |
ce5b453a SM |
4054 | b_fwd->type = Lisp_Fwd_Bool; |
4055 | b_fwd->boolvar = address; | |
b9598260 | 4056 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4057 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4058 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)b_fwd); | |
1ffcc3b1 | 4059 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
4060 | } |
4061 | ||
1a0f90f7 KH |
4062 | /* Similar but define a variable whose value is the Lisp Object stored |
4063 | at address. Two versions: with and without gc-marking of the C | |
4064 | variable. The nopro version is used when that variable will be | |
4065 | gc-marked for some other reason, since marking the same slot twice | |
4066 | can cause trouble with strings. */ | |
078e7b4a | 4067 | void |
ce5b453a SM |
4068 | defvar_lisp_nopro (struct Lisp_Objfwd *o_fwd, |
4069 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4070 | { |
ce5b453a | 4071 | Lisp_Object sym; |
5e2327cf | 4072 | sym = intern_c_string (namestring); |
ce5b453a SM |
4073 | o_fwd->type = Lisp_Fwd_Obj; |
4074 | o_fwd->objvar = address; | |
b9598260 | 4075 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4076 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4077 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)o_fwd); | |
078e7b4a JB |
4078 | } |
4079 | ||
078e7b4a | 4080 | void |
ce5b453a SM |
4081 | defvar_lisp (struct Lisp_Objfwd *o_fwd, |
4082 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4083 | { |
ce5b453a | 4084 | defvar_lisp_nopro (o_fwd, namestring, address); |
1a0f90f7 | 4085 | staticpro (address); |
078e7b4a JB |
4086 | } |
4087 | ||
950c215d | 4088 | /* Similar but define a variable whose value is the Lisp Object stored |
4ac38690 | 4089 | at a particular offset in the current kboard object. */ |
950c215d KH |
4090 | |
4091 | void | |
ce5b453a SM |
4092 | defvar_kboard (struct Lisp_Kboard_Objfwd *ko_fwd, |
4093 | const char *namestring, int offset) | |
950c215d | 4094 | { |
ce5b453a | 4095 | Lisp_Object sym; |
5e2327cf | 4096 | sym = intern_c_string (namestring); |
ce5b453a SM |
4097 | ko_fwd->type = Lisp_Fwd_Kboard_Obj; |
4098 | ko_fwd->offset = offset; | |
b9598260 | 4099 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4100 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4101 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)ko_fwd); | |
950c215d | 4102 | } |
078e7b4a | 4103 | \f |
11938f10 KH |
4104 | /* Record the value of load-path used at the start of dumping |
4105 | so we can see if the site changed it later during dumping. */ | |
4106 | static Lisp_Object dump_path; | |
4107 | ||
d5b28a9d | 4108 | void |
971de7fb | 4109 | init_lread (void) |
078e7b4a | 4110 | { |
8ea90aa3 | 4111 | const char *normal; |
e73997a1 | 4112 | int turn_off_warning = 0; |
078e7b4a | 4113 | |
279499f0 | 4114 | /* Compute the default load-path. */ |
46947372 JB |
4115 | #ifdef CANNOT_DUMP |
4116 | normal = PATH_LOADSEARCH; | |
e065a56e | 4117 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
4118 | #else |
4119 | if (NILP (Vpurify_flag)) | |
4120 | normal = PATH_LOADSEARCH; | |
279499f0 | 4121 | else |
46947372 | 4122 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 4123 | |
46947372 JB |
4124 | /* In a dumped Emacs, we normally have to reset the value of |
4125 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
4126 | uses ../lisp, instead of the path of the installed elisp | |
4127 | libraries. However, if it appears that Vload_path was changed | |
4128 | from the default before dumping, don't override that value. */ | |
4746118a JB |
4129 | if (initialized) |
4130 | { | |
4746118a | 4131 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
4132 | { |
4133 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 4134 | if (!NILP (Vinstallation_directory)) |
80667d53 | 4135 | { |
3ddff138 RS |
4136 | Lisp_Object tem, tem1, sitelisp; |
4137 | ||
4138 | /* Remove site-lisp dirs from path temporarily and store | |
4139 | them in sitelisp, then conc them on at the end so | |
4140 | they're always first in path. */ | |
4141 | sitelisp = Qnil; | |
4142 | while (1) | |
4143 | { | |
4144 | tem = Fcar (Vload_path); | |
4145 | tem1 = Fstring_match (build_string ("site-lisp"), | |
4146 | tem, Qnil); | |
4147 | if (!NILP (tem1)) | |
4148 | { | |
4149 | Vload_path = Fcdr (Vload_path); | |
4150 | sitelisp = Fcons (tem, sitelisp); | |
4151 | } | |
4152 | else | |
4153 | break; | |
4154 | } | |
4155 | ||
74180aa4 | 4156 | /* Add to the path the lisp subdir of the |
3a3056e5 | 4157 | installation dir, if it exists. */ |
74180aa4 RS |
4158 | tem = Fexpand_file_name (build_string ("lisp"), |
4159 | Vinstallation_directory); | |
3a3056e5 RS |
4160 | tem1 = Ffile_exists_p (tem); |
4161 | if (!NILP (tem1)) | |
4162 | { | |
4163 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
4164 | { |
4165 | turn_off_warning = 1; | |
3ddff138 | 4166 | Vload_path = Fcons (tem, Vload_path); |
e73997a1 | 4167 | } |
3a3056e5 RS |
4168 | } |
4169 | else | |
4170 | /* That dir doesn't exist, so add the build-time | |
4171 | Lisp dirs instead. */ | |
4172 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c | 4173 | |
9fbc0116 RS |
4174 | /* Add leim under the installation dir, if it exists. */ |
4175 | tem = Fexpand_file_name (build_string ("leim"), | |
4176 | Vinstallation_directory); | |
4177 | tem1 = Ffile_exists_p (tem); | |
4178 | if (!NILP (tem1)) | |
4179 | { | |
4180 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4181 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 RS |
4182 | } |
4183 | ||
88852d45 | 4184 | /* Add site-lisp under the installation dir, if it exists. */ |
c478f98c RS |
4185 | tem = Fexpand_file_name (build_string ("site-lisp"), |
4186 | Vinstallation_directory); | |
4187 | tem1 = Ffile_exists_p (tem); | |
4188 | if (!NILP (tem1)) | |
4189 | { | |
4190 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4191 | Vload_path = Fcons (tem, Vload_path); |
c478f98c | 4192 | } |
0f337465 RS |
4193 | |
4194 | /* If Emacs was not built in the source directory, | |
9fbc0116 RS |
4195 | and it is run from where it was built, add to load-path |
4196 | the lisp, leim and site-lisp dirs under that directory. */ | |
0f337465 RS |
4197 | |
4198 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) | |
4199 | { | |
33046fc9 RS |
4200 | Lisp_Object tem2; |
4201 | ||
0f337465 RS |
4202 | tem = Fexpand_file_name (build_string ("src/Makefile"), |
4203 | Vinstallation_directory); | |
4204 | tem1 = Ffile_exists_p (tem); | |
33046fc9 RS |
4205 | |
4206 | /* Don't be fooled if they moved the entire source tree | |
4207 | AFTER dumping Emacs. If the build directory is indeed | |
4208 | different from the source dir, src/Makefile.in and | |
4209 | src/Makefile will not be found together. */ | |
4210 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
4211 | Vinstallation_directory); | |
4212 | tem2 = Ffile_exists_p (tem); | |
4213 | if (!NILP (tem1) && NILP (tem2)) | |
0f337465 RS |
4214 | { |
4215 | tem = Fexpand_file_name (build_string ("lisp"), | |
4216 | Vsource_directory); | |
4217 | ||
4218 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4219 | Vload_path = Fcons (tem, Vload_path); |
0f337465 | 4220 | |
9fbc0116 RS |
4221 | tem = Fexpand_file_name (build_string ("leim"), |
4222 | Vsource_directory); | |
4223 | ||
4224 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4225 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 | 4226 | |
0f337465 RS |
4227 | tem = Fexpand_file_name (build_string ("site-lisp"), |
4228 | Vsource_directory); | |
4229 | ||
4230 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4231 | Vload_path = Fcons (tem, Vload_path); |
0f337465 RS |
4232 | } |
4233 | } | |
66b7b0fe | 4234 | if (!NILP (sitelisp) && !no_site_lisp) |
3ddff138 | 4235 | Vload_path = nconc2 (Fnreverse (sitelisp), Vload_path); |
80667d53 RS |
4236 | } |
4237 | } | |
4746118a JB |
4238 | } |
4239 | else | |
11938f10 | 4240 | { |
7b396c6c RS |
4241 | /* NORMAL refers to the lisp dir in the source directory. */ |
4242 | /* We used to add ../lisp at the front here, but | |
4243 | that caused trouble because it was copied from dump_path | |
88852d45 | 4244 | into Vload_path, above, when Vinstallation_directory was non-nil. |
7b396c6c RS |
4245 | It should be unnecessary. */ |
4246 | Vload_path = decode_env_path (0, normal); | |
11938f10 KH |
4247 | dump_path = Vload_path; |
4248 | } | |
46947372 | 4249 | #endif |
279499f0 | 4250 | |
9735b9ce | 4251 | #if (!(defined (WINDOWSNT) || (defined (HAVE_NS)))) |
177c0ea7 JB |
4252 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is |
4253 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 4254 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
9e2a2647 | 4255 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
317073d5 | 4256 | |
078e7b4a | 4257 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
4258 | if (!turn_off_warning) |
4259 | { | |
4260 | Lisp_Object path_tail; | |
078e7b4a | 4261 | |
e73997a1 RS |
4262 | for (path_tail = Vload_path; |
4263 | !NILP (path_tail); | |
c1d497be | 4264 | path_tail = XCDR (path_tail)) |
e73997a1 RS |
4265 | { |
4266 | Lisp_Object dirfile; | |
4267 | dirfile = Fcar (path_tail); | |
4268 | if (STRINGP (dirfile)) | |
4269 | { | |
4270 | dirfile = Fdirectory_file_name (dirfile); | |
42a5b22f | 4271 | if (access (SSDATA (dirfile), 0) < 0) |
85496b8c | 4272 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", |
c1d497be | 4273 | XCAR (path_tail)); |
e73997a1 RS |
4274 | } |
4275 | } | |
4276 | } | |
9e2a2647 | 4277 | #endif /* !(WINDOWSNT || HAVE_NS) */ |
46947372 JB |
4278 | |
4279 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
4280 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 4281 | #ifndef CANNOT_DUMP |
46947372 JB |
4282 | if (NILP (Vpurify_flag) |
4283 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 4284 | #endif |
279499f0 | 4285 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
4286 | |
4287 | Vvalues = Qnil; | |
4288 | ||
078e7b4a | 4289 | load_in_progress = 0; |
4e53f562 | 4290 | Vload_file_name = Qnil; |
d2c6be7f RS |
4291 | |
4292 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
4293 | |
4294 | Vstandard_input = Qt; | |
f74b0705 | 4295 | Vloads_in_progress = Qnil; |
078e7b4a JB |
4296 | } |
4297 | ||
85496b8c | 4298 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
88852d45 | 4299 | does not exist. Print it on stderr and put it in *Messages*. */ |
85496b8c | 4300 | |
d5b28a9d | 4301 | void |
a8fe7202 | 4302 | dir_warning (const char *format, Lisp_Object dirname) |
85496b8c | 4303 | { |
d5db4077 | 4304 | fprintf (stderr, format, SDATA (dirname)); |
0df02bf3 | 4305 | |
9b69357e GV |
4306 | /* Don't log the warning before we've initialized!! */ |
4307 | if (initialized) | |
0df02bf3 PE |
4308 | { |
4309 | char *buffer; | |
4310 | ptrdiff_t message_len; | |
4311 | USE_SAFE_ALLOCA; | |
4312 | SAFE_ALLOCA (buffer, char *, | |
4313 | SBYTES (dirname) + strlen (format) - (sizeof "%s" - 1) + 1); | |
4314 | message_len = esprintf (buffer, format, SDATA (dirname)); | |
4315 | message_dolog (buffer, message_len, 0, STRING_MULTIBYTE (dirname)); | |
4316 | SAFE_FREE (); | |
4317 | } | |
85496b8c RS |
4318 | } |
4319 | ||
078e7b4a | 4320 | void |
971de7fb | 4321 | syms_of_lread (void) |
078e7b4a JB |
4322 | { |
4323 | defsubr (&Sread); | |
4324 | defsubr (&Sread_from_string); | |
4325 | defsubr (&Sintern); | |
4326 | defsubr (&Sintern_soft); | |
d007f5c8 | 4327 | defsubr (&Sunintern); |
971a4293 | 4328 | defsubr (&Sget_load_suffixes); |
078e7b4a | 4329 | defsubr (&Sload); |
228d4b1c | 4330 | defsubr (&Seval_buffer); |
078e7b4a JB |
4331 | defsubr (&Seval_region); |
4332 | defsubr (&Sread_char); | |
4333 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 4334 | defsubr (&Sread_event); |
078e7b4a JB |
4335 | defsubr (&Sget_file_char); |
4336 | defsubr (&Smapatoms); | |
86d00812 | 4337 | defsubr (&Slocate_file_internal); |
078e7b4a | 4338 | |
29208e82 | 4339 | DEFVAR_LISP ("obarray", Vobarray, |
5de38842 PJ |
4340 | doc: /* Symbol table for use by `intern' and `read'. |
4341 | It is a vector whose length ought to be prime for best results. | |
4342 | The vector's contents don't make sense if examined from Lisp programs; | |
4343 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a | 4344 | |
29208e82 | 4345 | DEFVAR_LISP ("values", Vvalues, |
5de38842 PJ |
4346 | doc: /* List of values of all expressions which were read, evaluated and printed. |
4347 | Order is reverse chronological. */); | |
078e7b4a | 4348 | |
29208e82 | 4349 | DEFVAR_LISP ("standard-input", Vstandard_input, |
5de38842 PJ |
4350 | doc: /* Stream for read to get input from. |
4351 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
4352 | Vstandard_input = Qt; |
4353 | ||
29208e82 | 4354 | DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions, |
abb13b09 CW |
4355 | doc: /* If non-nil, add position of read symbols to `read-symbol-positions-list'. |
4356 | ||
4357 | If this variable is a buffer, then only forms read from that buffer | |
4358 | will be added to `read-symbol-positions-list'. | |
4359 | If this variable is t, then all read forms will be added. | |
4360 | The effect of all other values other than nil are not currently | |
4361 | defined, although they may be in the future. | |
4362 | ||
4363 | The positions are relative to the last call to `read' or | |
4364 | `read-from-string'. It is probably a bad idea to set this variable at | |
4365 | the toplevel; bind it instead. */); | |
4366 | Vread_with_symbol_positions = Qnil; | |
4367 | ||
29208e82 | 4368 | DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list, |
d6567030 | 4369 | doc: /* A list mapping read symbols to their positions. |
abb13b09 CW |
4370 | This variable is modified during calls to `read' or |
4371 | `read-from-string', but only when `read-with-symbol-positions' is | |
4372 | non-nil. | |
4373 | ||
4374 | Each element of the list looks like (SYMBOL . CHAR-POSITION), where | |
d6567030 | 4375 | CHAR-POSITION is an integer giving the offset of that occurrence of the |
abb13b09 CW |
4376 | symbol from the position where `read' or `read-from-string' started. |
4377 | ||
4378 | Note that a symbol will appear multiple times in this list, if it was | |
4379 | read multiple times. The list is in the same order as the symbols | |
4380 | were read in. */); | |
177c0ea7 | 4381 | Vread_symbol_positions_list = Qnil; |
abb13b09 | 4382 | |
29208e82 | 4383 | DEFVAR_LISP ("read-circle", Vread_circle, |
91f68422 CY |
4384 | doc: /* Non-nil means read recursive structures using #N= and #N# syntax. */); |
4385 | Vread_circle = Qt; | |
4386 | ||
29208e82 | 4387 | DEFVAR_LISP ("load-path", Vload_path, |
5de38842 PJ |
4388 | doc: /* *List of directories to search for files to load. |
4389 | Each element is a string (directory name) or nil (try default directory). | |
4390 | Initialized based on EMACSLOADPATH environment variable, if any, | |
4391 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 4392 | |
29208e82 | 4393 | DEFVAR_LISP ("load-suffixes", Vload_suffixes, |
971a4293 LT |
4394 | doc: /* List of suffixes for (compiled or source) Emacs Lisp files. |
4395 | This list should not include the empty string. | |
4396 | `load' and related functions try to append these suffixes, in order, | |
4397 | to the specified file name if a Lisp suffix is allowed or required. */); | |
a4ada374 DN |
4398 | Vload_suffixes = Fcons (make_pure_c_string (".elc"), |
4399 | Fcons (make_pure_c_string (".el"), Qnil)); | |
29208e82 | 4400 | DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes, |
971a4293 LT |
4401 | doc: /* List of suffixes that indicate representations of \ |
4402 | the same file. | |
4403 | This list should normally start with the empty string. | |
4404 | ||
4405 | Enabling Auto Compression mode appends the suffixes in | |
4406 | `jka-compr-load-suffixes' to this list and disabling Auto Compression | |
4407 | mode removes them again. `load' and related functions use this list to | |
4408 | determine whether they should look for compressed versions of a file | |
4409 | and, if so, which suffixes they should try to append to the file name | |
4410 | in order to do so. However, if you want to customize which suffixes | |
4411 | the loading functions recognize as compression suffixes, you should | |
4412 | customize `jka-compr-load-suffixes' rather than the present variable. */); | |
a74d1c97 | 4413 | Vload_file_rep_suffixes = Fcons (empty_unibyte_string, Qnil); |
e61b9b87 | 4414 | |
29208e82 | 4415 | DEFVAR_BOOL ("load-in-progress", load_in_progress, |
e0f24100 | 4416 | doc: /* Non-nil if inside of `load'. */); |
cd3520a4 | 4417 | DEFSYM (Qload_in_progress, "load-in-progress"); |
078e7b4a | 4418 | |
29208e82 | 4419 | DEFVAR_LISP ("after-load-alist", Vafter_load_alist, |
5de38842 | 4420 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
6bb6da3e AM |
4421 | Each element looks like (REGEXP-OR-FEATURE FORMS...). |
4422 | ||
4423 | REGEXP-OR-FEATURE is either a regular expression to match file names, or | |
4424 | a symbol \(a feature name). | |
4425 | ||
4426 | When `load' is run and the file-name argument matches an element's | |
4427 | REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol | |
4428 | REGEXP-OR-FEATURE, the FORMS in the element are executed. | |
4429 | ||
4430 | An error in FORMS does not undo the load, but does prevent execution of | |
4431 | the rest of the FORMS. */); | |
078e7b4a JB |
4432 | Vafter_load_alist = Qnil; |
4433 | ||
29208e82 | 4434 | DEFVAR_LISP ("load-history", Vload_history, |
4801c5fa CY |
4435 | doc: /* Alist mapping loaded file names to symbols and features. |
4436 | Each alist element should be a list (FILE-NAME ENTRIES...), where | |
4437 | FILE-NAME is the name of a file that has been loaded into Emacs. | |
4438 | The file name is absolute and true (i.e. it doesn't contain symlinks). | |
4439 | As an exception, one of the alist elements may have FILE-NAME nil, | |
4440 | for symbols and features not associated with any file. | |
4441 | ||
4442 | The remaining ENTRIES in the alist element describe the functions and | |
4443 | variables defined in that file, the features provided, and the | |
4444 | features required. Each entry has the form `(provide . FEATURE)', | |
4445 | `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)', | |
69bb1ef7 LMI |
4446 | `(defface . SYMBOL)', or `(t . SYMBOL)'. Entries like `(t . SYMBOL)' |
4447 | may precede a `(defun . FUNCTION)' entry, and means that SYMBOL was an | |
4448 | autoload before this file redefined it as a function. In addition, | |
4449 | entries may also be single symbols, which means that SYMBOL was | |
4450 | defined by `defvar' or `defconst'. | |
0fc213e9 | 4451 | |
b502a9a1 RS |
4452 | During preloading, the file name recorded is relative to the main Lisp |
4453 | directory. These file names are converted to absolute at startup. */); | |
ae321d28 RS |
4454 | Vload_history = Qnil; |
4455 | ||
29208e82 | 4456 | DEFVAR_LISP ("load-file-name", Vload_file_name, |
5de38842 | 4457 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
4458 | Vload_file_name = Qnil; |
4459 | ||
29208e82 | 4460 | DEFVAR_LISP ("user-init-file", Vuser_init_file, |
5de38842 | 4461 | doc: /* File name, including directory, of user's initialization file. |
0a25a201 RS |
4462 | If the file loaded had extension `.elc', and the corresponding source file |
4463 | exists, this variable contains the name of source file, suitable for use | |
099de390 JB |
4464 | by functions like `custom-save-all' which edit the init file. |
4465 | While Emacs loads and evaluates the init file, value is the real name | |
4466 | of the file, regardless of whether or not it has the `.elc' extension. */); | |
4116ab9f KH |
4467 | Vuser_init_file = Qnil; |
4468 | ||
29208e82 | 4469 | DEFVAR_LISP ("current-load-list", Vcurrent_load_list, |
5de38842 | 4470 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
4471 | Vcurrent_load_list = Qnil; |
4472 | ||
29208e82 | 4473 | DEFVAR_LISP ("load-read-function", Vload_read_function, |
5de38842 PJ |
4474 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
4475 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
4476 | Vload_read_function = Qnil; |
4477 | ||
29208e82 | 4478 | DEFVAR_LISP ("load-source-file-function", Vload_source_file_function, |
9b33a603 | 4479 | doc: /* Function called in `load' for loading an Emacs Lisp source file. |
5de38842 PJ |
4480 | This function is for doing code conversion before reading the source file. |
4481 | If nil, loading is done without any code conversion. | |
4482 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
4483 | FULLNAME is the full name of FILE. | |
4484 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
4485 | Vload_source_file_function = Qnil; |
4486 | ||
29208e82 | 4487 | DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings, |
5de38842 PJ |
4488 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
4489 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
4490 | load_force_doc_strings = 0; |
4491 | ||
29208e82 | 4492 | DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte, |
5de38842 PJ |
4493 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
4494 | This is normally bound by `load' and `eval-buffer' to control `read', | |
4495 | and is not meant for users to change. */); | |
94e554db RS |
4496 | load_convert_to_unibyte = 0; |
4497 | ||
29208e82 | 4498 | DEFVAR_LISP ("source-directory", Vsource_directory, |
5de38842 PJ |
4499 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
4500 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
4501 | Vsource_directory |
4502 | = Fexpand_file_name (build_string ("../"), | |
4503 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
4504 | ||
29208e82 | 4505 | DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list, |
5de38842 | 4506 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
4507 | Vpreloaded_file_list = Qnil; |
4508 | ||
29208e82 | 4509 | DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars, |
5de38842 | 4510 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
4511 | Vbyte_boolean_vars = Qnil; |
4512 | ||
29208e82 | 4513 | DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries, |
5de38842 PJ |
4514 | doc: /* Non-nil means load dangerous compiled Lisp files. |
4515 | Some versions of XEmacs use different byte codes than Emacs. These | |
4516 | incompatible byte codes can make Emacs crash when it tries to execute | |
4517 | them. */); | |
da84f340 GM |
4518 | load_dangerous_libraries = 0; |
4519 | ||
29208e82 | 4520 | DEFVAR_BOOL ("force-load-messages", force_load_messages, |
beb0b7f9 EZ |
4521 | doc: /* Non-nil means force printing messages when loading Lisp files. |
4522 | This overrides the value of the NOMESSAGE argument to `load'. */); | |
4523 | force_load_messages = 0; | |
4524 | ||
29208e82 | 4525 | DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp, |
5de38842 PJ |
4526 | doc: /* Regular expression matching safe to load compiled Lisp files. |
4527 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
4528 | from the file, and matches them against this regular expression. | |
4529 | When the regular expression matches, the file is considered to be safe | |
4530 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 4531 | Vbytecomp_version_regexp |
d67b4f80 | 4532 | = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 4533 | |
b9598260 SM |
4534 | Qlexical_binding = intern ("lexical-binding"); |
4535 | staticpro (&Qlexical_binding); | |
8f1d2ef6 | 4536 | DEFVAR_LISP ("lexical-binding", Vlexical_binding, |
f41628b2 LMI |
4537 | doc: /* Whether to use lexical binding when evaluating code. |
4538 | Non-nil means that the code in the current buffer should be evaluated | |
4539 | with lexical binding. | |
1d698799 LMI |
4540 | This variable is automatically set from the file variables of an |
4541 | interpreted Lisp file read using `load'. */); | |
b9598260 SM |
4542 | Fmake_variable_buffer_local (Qlexical_binding); |
4543 | ||
29208e82 | 4544 | DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list, |
3f39f996 RS |
4545 | doc: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */); |
4546 | Veval_buffer_list = Qnil; | |
4547 | ||
29208e82 | 4548 | DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes, |
5aa273b0 SM |
4549 | doc: /* Set to non-nil when `read' encounters an old-style backquote. */); |
4550 | Vold_style_backquotes = Qnil; | |
cd3520a4 | 4551 | DEFSYM (Qold_style_backquotes, "old-style-backquotes"); |
5aa273b0 | 4552 | |
a90ba1e2 KH |
4553 | /* Vsource_directory was initialized in init_lread. */ |
4554 | ||
d2c6be7f RS |
4555 | load_descriptor_list = Qnil; |
4556 | staticpro (&load_descriptor_list); | |
4557 | ||
cd3520a4 JB |
4558 | DEFSYM (Qcurrent_load_list, "current-load-list"); |
4559 | DEFSYM (Qstandard_input, "standard-input"); | |
4560 | DEFSYM (Qread_char, "read-char"); | |
4561 | DEFSYM (Qget_file_char, "get-file-char"); | |
4562 | DEFSYM (Qget_emacs_mule_file_char, "get-emacs-mule-file-char"); | |
4563 | DEFSYM (Qload_force_doc_strings, "load-force-doc-strings"); | |
4564 | ||
4565 | DEFSYM (Qbackquote, "`"); | |
4566 | DEFSYM (Qcomma, ","); | |
4567 | DEFSYM (Qcomma_at, ",@"); | |
4568 | DEFSYM (Qcomma_dot, ",."); | |
4569 | ||
4570 | DEFSYM (Qinhibit_file_name_operation, "inhibit-file-name-operation"); | |
4571 | DEFSYM (Qascii_character, "ascii-character"); | |
4572 | DEFSYM (Qfunction, "function"); | |
4573 | DEFSYM (Qload, "load"); | |
4574 | DEFSYM (Qload_file_name, "load-file-name"); | |
4575 | DEFSYM (Qeval_buffer_list, "eval-buffer-list"); | |
4576 | DEFSYM (Qfile_truename, "file-truename"); | |
4577 | DEFSYM (Qdir_ok, "dir-ok"); | |
4578 | DEFSYM (Qdo_after_load_evaluation, "do-after-load-evaluation"); | |
6bb6da3e | 4579 | |
11938f10 | 4580 | staticpro (&dump_path); |
4ad679f9 EN |
4581 | |
4582 | staticpro (&read_objects); | |
4583 | read_objects = Qnil; | |
9e062b6c | 4584 | staticpro (&seen_list); |
f153db13 | 4585 | seen_list = Qnil; |
177c0ea7 | 4586 | |
7ee3bd7b GM |
4587 | Vloads_in_progress = Qnil; |
4588 | staticpro (&Vloads_in_progress); | |
f19a0f5b | 4589 | |
cd3520a4 JB |
4590 | DEFSYM (Qhash_table, "hash-table"); |
4591 | DEFSYM (Qdata, "data"); | |
4592 | DEFSYM (Qtest, "test"); | |
4593 | DEFSYM (Qsize, "size"); | |
4594 | DEFSYM (Qweakness, "weakness"); | |
4595 | DEFSYM (Qrehash_size, "rehash-size"); | |
4596 | DEFSYM (Qrehash_threshold, "rehash-threshold"); | |
078e7b4a | 4597 | } |