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!!) */ |
da43f021 EZ |
112 | static EMACS_INT read_from_string_index; |
113 | static EMACS_INT read_from_string_index_byte; | |
114 | static EMACS_INT 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 | |
da43f021 | 212 | EMACS_INT 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 | |
da43f021 | 241 | EMACS_INT 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); |
cffc6f3b | 375 | EMACS_INT charpos = BUF_PT (b); |
da43f021 | 376 | EMACS_INT 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; |
da43f021 | 388 | EMACS_INT 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 CY |
610 | |
611 | sec = (int) duration; | |
612 | usec = (duration - sec) * 1000000; | |
613 | EMACS_GET_TIME (end_time); | |
614 | EMACS_SET_SECS_USECS (wait_time, sec, usec); | |
615 | EMACS_ADD_TIME (end_time, end_time, wait_time); | |
616 | } | |
617 | ||
251bc578 | 618 | /* Read until we get an acceptable event. */ |
f42be754 | 619 | retry: |
88852d45 | 620 | do |
251bc578 KL |
621 | val = read_char (0, 0, 0, (input_method ? Qnil : Qt), 0, |
622 | NUMBERP (seconds) ? &end_time : NULL); | |
9688ff53 | 623 | while (INTEGERP (val) && XINT (val) == -2); /* wrong_kboard_jmpbuf */ |
f42be754 | 624 | |
cfff016d | 625 | if (BUFFERP (val)) |
6c82d689 KH |
626 | goto retry; |
627 | ||
f42be754 | 628 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 629 | character. This is better than signaling an error just because |
f42be754 JB |
630 | the last characters were typed to a separate minibuffer frame, |
631 | for example. Eventually, some code which can deal with | |
632 | switch-frame events will read it and process it. */ | |
633 | if (no_switch_frame | |
634 | && EVENT_HAS_PARAMETERS (val) | |
ca77ee45 | 635 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val)), Qswitch_frame)) |
f42be754 JB |
636 | { |
637 | delayed_switch_frame = val; | |
638 | goto retry; | |
639 | } | |
640 | ||
50e48299 | 641 | if (ascii_required && !(NUMBERP (seconds) && NILP (val))) |
f42be754 JB |
642 | { |
643 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 644 | if (SYMBOLP (val)) |
f42be754 | 645 | { |
95384e1e | 646 | Lisp_Object tem, tem1; |
f42be754 JB |
647 | tem = Fget (val, Qevent_symbol_element_mask); |
648 | if (!NILP (tem)) | |
649 | { | |
650 | tem1 = Fget (Fcar (tem), Qascii_character); | |
651 | /* Merge this symbol's modifier bits | |
652 | with the ASCII equivalent of its basic code. */ | |
653 | if (!NILP (tem1)) | |
baf69866 | 654 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
655 | } |
656 | } | |
177c0ea7 | 657 | |
f42be754 | 658 | /* If we don't have a character now, deal with it appropriately. */ |
cfff016d | 659 | if (!INTEGERP (val)) |
f42be754 JB |
660 | { |
661 | if (error_nonascii) | |
662 | { | |
1ec84625 | 663 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
664 | error ("Non-character input-event"); |
665 | } | |
666 | else | |
667 | goto retry; | |
668 | } | |
669 | } | |
670 | ||
671 | if (! NILP (delayed_switch_frame)) | |
672 | unread_switch_frame = delayed_switch_frame; | |
673 | ||
67868d27 PJ |
674 | #if 0 |
675 | ||
5dbf89bc | 676 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
677 | if (display_hourglass_p) |
678 | start_hourglass (); | |
5dbf89bc | 679 | #endif |
67868d27 PJ |
680 | |
681 | #endif | |
682 | ||
f42be754 | 683 | return val; |
f42be754 JB |
684 | } |
685 | ||
a7ca3326 | 686 | DEFUN ("read-char", Fread_char, Sread_char, 0, 3, 0, |
5de38842 PJ |
687 | doc: /* Read a character from the command input (keyboard or macro). |
688 | It is returned as a number. | |
fb26c2af KH |
689 | If the character has modifiers, they are resolved and reflected to the |
690 | character code if possible (e.g. C-SPC -> 0). | |
691 | ||
5de38842 PJ |
692 | If the user generates an event which is not a character (i.e. a mouse |
693 | click or function key event), `read-char' signals an error. As an | |
fb26c2af KH |
694 | exception, switch-frame events are put off until non-character events |
695 | can be read. | |
5de38842 PJ |
696 | If you want to read non-character events, or ignore them, call |
697 | `read-event' or `read-char-exclusive' instead. | |
698 | ||
699 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
700 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
701 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
702 | is used for reading a character. |
703 | If the optional argument SECONDS is non-nil, it should be a number | |
704 | specifying the maximum number of seconds to wait for input. If no | |
705 | input arrives in that time, return nil. SECONDS may be a | |
706 | floating-point value. */) | |
5842a27b | 707 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 708 | { |
fb26c2af | 709 | Lisp_Object val; |
fb26c2af | 710 | |
bb49a192 RS |
711 | if (! NILP (prompt)) |
712 | message_with_string ("%s", prompt, 0); | |
fb26c2af | 713 | val = read_filtered_event (1, 1, 1, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
714 | |
715 | return (NILP (val) ? Qnil | |
716 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a JB |
717 | } |
718 | ||
a7ca3326 | 719 | DEFUN ("read-event", Fread_event, Sread_event, 0, 3, 0, |
5de38842 PJ |
720 | doc: /* Read an event object from the input stream. |
721 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
722 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
723 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
724 | is used for reading a character. |
725 | If the optional argument SECONDS is non-nil, it should be a number | |
726 | specifying the maximum number of seconds to wait for input. If no | |
727 | input arrives in that time, return nil. SECONDS may be a | |
728 | floating-point value. */) | |
5842a27b | 729 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 730 | { |
bb49a192 RS |
731 | if (! NILP (prompt)) |
732 | message_with_string ("%s", prompt, 0); | |
50e48299 | 733 | return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method), seconds); |
078e7b4a JB |
734 | } |
735 | ||
50e48299 | 736 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 3, 0, |
5de38842 PJ |
737 | doc: /* Read a character from the command input (keyboard or macro). |
738 | It is returned as a number. Non-character events are ignored. | |
fb26c2af KH |
739 | If the character has modifiers, they are resolved and reflected to the |
740 | character code if possible (e.g. C-SPC -> 0). | |
5de38842 PJ |
741 | |
742 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
743 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
744 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
745 | is used for reading a character. |
746 | If the optional argument SECONDS is non-nil, it should be a number | |
747 | specifying the maximum number of seconds to wait for input. If no | |
748 | input arrives in that time, return nil. SECONDS may be a | |
749 | floating-point value. */) | |
5842a27b | 750 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 751 | { |
fb26c2af | 752 | Lisp_Object val; |
fb26c2af | 753 | |
bb49a192 RS |
754 | if (! NILP (prompt)) |
755 | message_with_string ("%s", prompt, 0); | |
66c410ce | 756 | |
fb26c2af | 757 | val = read_filtered_event (1, 1, 0, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
758 | |
759 | return (NILP (val) ? Qnil | |
760 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a | 761 | } |
078e7b4a JB |
762 | |
763 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
5de38842 | 764 | doc: /* Don't use this yourself. */) |
5842a27b | 765 | (void) |
078e7b4a JB |
766 | { |
767 | register Lisp_Object val; | |
66cd0949 | 768 | BLOCK_INPUT; |
1805de4f | 769 | XSETINT (val, getc (instream)); |
66cd0949 | 770 | UNBLOCK_INPUT; |
078e7b4a JB |
771 | return val; |
772 | } | |
da84f340 GM |
773 | |
774 | ||
550a625e | 775 | \f |
b9598260 SM |
776 | |
777 | /* Return true if the lisp code read using READCHARFUN defines a non-nil | |
778 | `lexical-binding' file variable. After returning, the stream is | |
779 | positioned following the first line, if it is a comment, otherwise | |
780 | nothing is read. */ | |
781 | ||
782 | static int | |
c566235d | 783 | lisp_file_lexically_bound_p (Lisp_Object readcharfun) |
b9598260 SM |
784 | { |
785 | int ch = READCHAR; | |
786 | if (ch != ';') | |
787 | /* The first line isn't a comment, just give up. */ | |
788 | { | |
789 | UNREAD (ch); | |
790 | return 0; | |
791 | } | |
792 | else | |
793 | /* Look for an appropriate file-variable in the first line. */ | |
794 | { | |
795 | int rv = 0; | |
796 | enum { | |
797 | NOMINAL, AFTER_FIRST_DASH, AFTER_ASTERIX, | |
798 | } beg_end_state = NOMINAL; | |
799 | int in_file_vars = 0; | |
800 | ||
7200d79c SM |
801 | #define UPDATE_BEG_END_STATE(ch) \ |
802 | if (beg_end_state == NOMINAL) \ | |
803 | beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \ | |
804 | else if (beg_end_state == AFTER_FIRST_DASH) \ | |
805 | beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \ | |
806 | else if (beg_end_state == AFTER_ASTERIX) \ | |
807 | { \ | |
808 | if (ch == '-') \ | |
809 | in_file_vars = !in_file_vars; \ | |
810 | beg_end_state = NOMINAL; \ | |
b9598260 SM |
811 | } |
812 | ||
813 | /* Skip until we get to the file vars, if any. */ | |
814 | do | |
815 | { | |
816 | ch = READCHAR; | |
817 | UPDATE_BEG_END_STATE (ch); | |
818 | } | |
819 | while (!in_file_vars && ch != '\n' && ch != EOF); | |
820 | ||
821 | while (in_file_vars) | |
822 | { | |
06a0259a | 823 | char var[100], val[100]; |
3c346cc3 | 824 | unsigned i; |
b9598260 SM |
825 | |
826 | ch = READCHAR; | |
827 | ||
828 | /* Read a variable name. */ | |
829 | while (ch == ' ' || ch == '\t') | |
830 | ch = READCHAR; | |
831 | ||
06a0259a | 832 | i = 0; |
db7a0b4f | 833 | while (ch != ':' && ch != '\n' && ch != EOF && in_file_vars) |
b9598260 | 834 | { |
06a0259a PE |
835 | if (i < sizeof var - 1) |
836 | var[i++] = ch; | |
b9598260 SM |
837 | UPDATE_BEG_END_STATE (ch); |
838 | ch = READCHAR; | |
839 | } | |
7200d79c | 840 | |
db7a0b4f AS |
841 | /* Stop scanning if no colon was found before end marker. */ |
842 | if (!in_file_vars) | |
843 | break; | |
844 | ||
06a0259a PE |
845 | while (i > 0 && (var[i - 1] == ' ' || var[i - 1] == '\t')) |
846 | i--; | |
847 | var[i] = '\0'; | |
b9598260 SM |
848 | |
849 | if (ch == ':') | |
850 | { | |
851 | /* Read a variable value. */ | |
852 | ch = READCHAR; | |
853 | ||
854 | while (ch == ' ' || ch == '\t') | |
855 | ch = READCHAR; | |
856 | ||
06a0259a | 857 | i = 0; |
b9598260 SM |
858 | while (ch != ';' && ch != '\n' && ch != EOF && in_file_vars) |
859 | { | |
06a0259a PE |
860 | if (i < sizeof val - 1) |
861 | val[i++] = ch; | |
b9598260 SM |
862 | UPDATE_BEG_END_STATE (ch); |
863 | ch = READCHAR; | |
864 | } | |
865 | if (! in_file_vars) | |
866 | /* The value was terminated by an end-marker, which | |
867 | remove. */ | |
06a0259a PE |
868 | i -= 3; |
869 | while (i > 0 && (val[i - 1] == ' ' || val[i - 1] == '\t')) | |
870 | i--; | |
871 | val[i] = '\0'; | |
b9598260 SM |
872 | |
873 | if (strcmp (var, "lexical-binding") == 0) | |
874 | /* This is it... */ | |
875 | { | |
876 | rv = (strcmp (val, "nil") != 0); | |
877 | break; | |
878 | } | |
879 | } | |
880 | } | |
881 | ||
882 | while (ch != '\n' && ch != EOF) | |
883 | ch = READCHAR; | |
884 | ||
885 | return rv; | |
886 | } | |
887 | } | |
b9598260 | 888 | \f |
8792be66 | 889 | /* Value is a version number of byte compiled code if the file |
c73bd236 | 890 | associated with file descriptor FD is a compiled Lisp file that's |
8792be66 KH |
891 | safe to load. Only files compiled with Emacs are safe to load. |
892 | Files compiled with XEmacs can lead to a crash in Fbyte_code | |
893 | because of an incompatible change in the byte compiler. */ | |
da84f340 GM |
894 | |
895 | static int | |
971de7fb | 896 | safe_to_load_p (int fd) |
da84f340 GM |
897 | { |
898 | char buf[512]; | |
899 | int nbytes, i; | |
900 | int safe_p = 1; | |
8f924df7 | 901 | int version = 1; |
da84f340 GM |
902 | |
903 | /* Read the first few bytes from the file, and look for a line | |
904 | specifying the byte compiler version used. */ | |
905 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
906 | if (nbytes > 0) | |
907 | { | |
908 | buf[nbytes] = '\0'; | |
909 | ||
910 | /* Skip to the next newline, skipping over the initial `ELC' | |
1da3b9e4 | 911 | with NUL bytes following it, but note the version. */ |
da84f340 | 912 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) |
1da3b9e4 | 913 | if (i == 4) |
8792be66 | 914 | version = buf[i]; |
da84f340 | 915 | |
e6eb4e9e | 916 | if (i >= nbytes |
927f12da | 917 | || fast_c_string_match_ignore_case (Vbytecomp_version_regexp, |
da84f340 GM |
918 | buf + i) < 0) |
919 | safe_p = 0; | |
920 | } | |
1da3b9e4 DL |
921 | if (safe_p) |
922 | safe_p = version; | |
da84f340 GM |
923 | |
924 | lseek (fd, 0, SEEK_SET); | |
925 | return safe_p; | |
926 | } | |
927 | ||
928 | ||
7ee3bd7b GM |
929 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
930 | after loading a file successfully. */ | |
931 | ||
932 | static Lisp_Object | |
971de7fb | 933 | record_load_unwind (Lisp_Object old) |
7ee3bd7b GM |
934 | { |
935 | return Vloads_in_progress = old; | |
936 | } | |
937 | ||
164c8bfe RS |
938 | /* This handler function is used via internal_condition_case_1. */ |
939 | ||
940 | static Lisp_Object | |
971de7fb | 941 | load_error_handler (Lisp_Object data) |
164c8bfe RS |
942 | { |
943 | return Qnil; | |
944 | } | |
7ee3bd7b | 945 | |
1d064697 | 946 | static Lisp_Object |
971de7fb | 947 | load_warn_old_style_backquotes (Lisp_Object file) |
1d064697 SM |
948 | { |
949 | if (!NILP (Vold_style_backquotes)) | |
950 | { | |
b636b4c1 | 951 | Lisp_Object args[2]; |
18a4a65e | 952 | args[0] = build_string ("Loading `%s': old-style backquotes detected!"); |
1d064697 SM |
953 | args[1] = file; |
954 | Fmessage (2, args); | |
955 | } | |
956 | return Qnil; | |
957 | } | |
958 | ||
a7ca3326 | 959 | DEFUN ("get-load-suffixes", Fget_load_suffixes, Sget_load_suffixes, 0, 0, 0, |
971a4293 LT |
960 | doc: /* Return the suffixes that `load' should try if a suffix is \ |
961 | required. | |
962 | This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */) | |
5842a27b | 963 | (void) |
971a4293 LT |
964 | { |
965 | Lisp_Object lst = Qnil, suffixes = Vload_suffixes, suffix, ext; | |
966 | while (CONSP (suffixes)) | |
967 | { | |
968 | Lisp_Object exts = Vload_file_rep_suffixes; | |
969 | suffix = XCAR (suffixes); | |
970 | suffixes = XCDR (suffixes); | |
971 | while (CONSP (exts)) | |
972 | { | |
973 | ext = XCAR (exts); | |
974 | exts = XCDR (exts); | |
975 | lst = Fcons (concat2 (suffix, ext), lst); | |
976 | } | |
977 | } | |
978 | return Fnreverse (lst); | |
979 | } | |
980 | ||
a7ca3326 | 981 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
982 | doc: /* Execute a file of Lisp code named FILE. |
983 | First try FILE with `.elc' appended, then try with `.el', | |
971a4293 | 984 | then try FILE unmodified (the exact suffixes in the exact order are |
88852d45 | 985 | determined by `load-suffixes'). Environment variable references in |
971a4293 | 986 | FILE are replaced with their values by calling `substitute-in-file-name'. |
5de38842 | 987 | This function searches the directories in `load-path'. |
971a4293 | 988 | |
5de38842 | 989 | If optional second arg NOERROR is non-nil, |
971a4293 | 990 | report no error if FILE doesn't exist. |
5de38842 | 991 | Print messages at start and end of loading unless |
beb0b7f9 EZ |
992 | optional third arg NOMESSAGE is non-nil (but `force-load-messages' |
993 | overrides that). | |
5de38842 | 994 | If optional fourth arg NOSUFFIX is non-nil, don't try adding |
971a4293 | 995 | suffixes `.elc' or `.el' to the specified name FILE. |
5de38842 | 996 | If optional fifth arg MUST-SUFFIX is non-nil, insist on |
971a4293 LT |
997 | the suffix `.elc' or `.el'; don't accept just FILE unless |
998 | it ends in one of those suffixes or includes a directory name. | |
999 | ||
1000 | If this function fails to find a file, it may look for different | |
1001 | representations of that file before trying another file. | |
1002 | It does so by adding the non-empty suffixes in `load-file-rep-suffixes' | |
1003 | to the file name. Emacs uses this feature mainly to find compressed | |
1004 | versions of files when Auto Compression mode is enabled. | |
1005 | ||
1006 | The exact suffixes that this function tries out, in the exact order, | |
1007 | are given by the value of the variable `load-file-rep-suffixes' if | |
1008 | NOSUFFIX is non-nil and by the return value of the function | |
1009 | `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and | |
1010 | MUST-SUFFIX are nil, this function first tries out the latter suffixes | |
1011 | and then the former. | |
0fc213e9 RS |
1012 | |
1013 | Loading a file records its definitions, and its `provide' and | |
1014 | `require' calls, in an element of `load-history' whose | |
1015 | car is the file name loaded. See `load-history'. | |
1016 | ||
c7926fe2 EZ |
1017 | While the file is in the process of being loaded, the variable |
1018 | `load-in-progress' is non-nil and the variable `load-file-name' | |
1019 | is bound to the file's name. | |
1020 | ||
971a4293 | 1021 | Return t if the file exists and loads successfully. */) |
5842a27b | 1022 | (Lisp_Object file, Lisp_Object noerror, Lisp_Object nomessage, Lisp_Object nosuffix, Lisp_Object must_suffix) |
078e7b4a JB |
1023 | { |
1024 | register FILE *stream; | |
1025 | register int fd = -1; | |
aed13378 | 1026 | int count = SPECPDL_INDEX (); |
6bb6da3e AM |
1027 | struct gcpro gcpro1, gcpro2, gcpro3; |
1028 | Lisp_Object found, efound, hist_file_name; | |
04fc68e7 RS |
1029 | /* 1 means we printed the ".el is newer" message. */ |
1030 | int newer = 0; | |
1031 | /* 1 means we are loading a compiled file. */ | |
1032 | int compiled = 0; | |
c2225d00 | 1033 | Lisp_Object handler; |
456c67a4 | 1034 | int safe_p = 1; |
8ea90aa3 | 1035 | const char *fmode = "r"; |
6bb6da3e | 1036 | Lisp_Object tmp[2]; |
8792be66 KH |
1037 | int version; |
1038 | ||
317073d5 | 1039 | #ifdef DOS_NT |
229ba775 | 1040 | fmode = "rt"; |
317073d5 | 1041 | #endif /* DOS_NT */ |
078e7b4a | 1042 | |
b7826503 | 1043 | CHECK_STRING (file); |
078e7b4a | 1044 | |
c2225d00 | 1045 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
1046 | /* This shouldn't be necessary any more now that `openp' handles it right. |
1047 | handler = Ffind_file_name_handler (file, Qload); | |
1048 | if (!NILP (handler)) | |
1049 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 1050 | |
07a0bda3 RS |
1051 | /* Do this after the handler to avoid |
1052 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
1053 | (Below here, we care only whether they are nil or not.) |
1054 | The presence of this call is the result of a historical accident: | |
6bb6da3e | 1055 | it used to be in every file-operation and when it got removed |
e61b9b87 SM |
1056 | everywhere, it accidentally stayed here. Since then, enough people |
1057 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
1058 | that it seemed risky to remove. */ | |
164c8bfe RS |
1059 | if (! NILP (noerror)) |
1060 | { | |
1061 | file = internal_condition_case_1 (Fsubstitute_in_file_name, file, | |
1062 | Qt, load_error_handler); | |
1063 | if (NILP (file)) | |
1064 | return Qnil; | |
1065 | } | |
1066 | else | |
1067 | file = Fsubstitute_in_file_name (file); | |
177c0ea7 | 1068 | |
07a0bda3 | 1069 | |
078e7b4a JB |
1070 | /* Avoid weird lossage with null string as arg, |
1071 | since it would try to load a directory as a Lisp file */ | |
82cb60d3 | 1072 | if (SBYTES (file) > 0) |
078e7b4a | 1073 | { |
82cb60d3 | 1074 | ptrdiff_t size = SBYTES (file); |
211f7dcd | 1075 | |
0fc213e9 RS |
1076 | found = Qnil; |
1077 | GCPRO2 (file, found); | |
211f7dcd RS |
1078 | |
1079 | if (! NILP (must_suffix)) | |
1080 | { | |
1081 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
1082 | if (size > 3 | |
42a5b22f | 1083 | && !strcmp (SSDATA (file) + size - 3, ".el")) |
211f7dcd RS |
1084 | must_suffix = Qnil; |
1085 | else if (size > 4 | |
42a5b22f | 1086 | && !strcmp (SSDATA (file) + size - 4, ".elc")) |
211f7dcd RS |
1087 | must_suffix = Qnil; |
1088 | /* Don't insist on adding a suffix | |
1089 | if the argument includes a directory name. */ | |
1090 | else if (! NILP (Ffile_name_directory (file))) | |
1091 | must_suffix = Qnil; | |
1092 | } | |
1093 | ||
f0a50954 | 1094 | fd = openp (Vload_path, file, |
e61b9b87 | 1095 | (!NILP (nosuffix) ? Qnil |
971a4293 LT |
1096 | : !NILP (must_suffix) ? Fget_load_suffixes () |
1097 | : Fappend (2, (tmp[0] = Fget_load_suffixes (), | |
1098 | tmp[1] = Vload_file_rep_suffixes, | |
e61b9b87 | 1099 | tmp))), |
86d00812 | 1100 | &found, Qnil); |
5a6e5452 | 1101 | UNGCPRO; |
078e7b4a JB |
1102 | } |
1103 | ||
96dc0f4e | 1104 | if (fd == -1) |
078e7b4a | 1105 | { |
265a9e55 | 1106 | if (NILP (noerror)) |
336d4a9c KS |
1107 | xsignal2 (Qfile_error, build_string ("Cannot open load file"), file); |
1108 | return Qnil; | |
078e7b4a JB |
1109 | } |
1110 | ||
ba0d1195 | 1111 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
1112 | if (EQ (Qt, Vuser_init_file)) |
1113 | Vuser_init_file = found; | |
1114 | ||
96dc0f4e MB |
1115 | /* If FD is -2, that means openp found a magic file. */ |
1116 | if (fd == -2) | |
74549846 | 1117 | { |
5e24a1f7 KH |
1118 | if (NILP (Fequal (found, file))) |
1119 | /* If FOUND is a different file name from FILE, | |
1120 | find its handler even if we have already inhibited | |
1121 | the `load' operation on FILE. */ | |
1122 | handler = Ffind_file_name_handler (found, Qt); | |
1123 | else | |
1124 | handler = Ffind_file_name_handler (found, Qload); | |
1125 | if (! NILP (handler)) | |
1126 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
35774242 EZ |
1127 | #ifdef DOS_NT |
1128 | /* Tramp has to deal with semi-broken packages that prepend | |
1129 | drive letters to remote files. For that reason, Tramp | |
1130 | catches file operations that test for file existence, which | |
1131 | makes openp think X:/foo.elc files are remote. However, | |
1132 | Tramp does not catch `load' operations for such files, so we | |
1133 | end up with a nil as the `load' handler above. If we would | |
1134 | continue with fd = -2, we will behave wrongly, and in | |
1135 | particular try reading a .elc file in the "rt" mode instead | |
1136 | of "rb". See bug #9311 for the results. To work around | |
1137 | this, we try to open the file locally, and go with that if it | |
1138 | succeeds. */ | |
1139 | fd = emacs_open (SSDATA (ENCODE_FILE (found)), O_RDONLY, 0); | |
1140 | if (fd == -1) | |
1141 | fd = -2; | |
1142 | #endif | |
74549846 RS |
1143 | } |
1144 | ||
550a625e GM |
1145 | /* Check if we're stuck in a recursive load cycle. |
1146 | ||
1147 | 2000-09-21: It's not possible to just check for the file loaded | |
1148 | being a member of Vloads_in_progress. This fails because of the | |
1149 | way the byte compiler currently works; `provide's are not | |
9d438325 | 1150 | evaluated, see font-lock.el/jit-lock.el as an example. This |
550a625e GM |
1151 | leads to a certain amount of ``normal'' recursion. |
1152 | ||
1153 | Also, just loading a file recursively is not always an error in | |
1154 | the general case; the second load may do something different. */ | |
3ba6fd9a | 1155 | { |
0902fe45 | 1156 | int load_count = 0; |
3ba6fd9a RS |
1157 | Lisp_Object tem; |
1158 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
0902fe45 | 1159 | if (!NILP (Fequal (found, XCAR (tem))) && (++load_count > 3)) |
8fc45744 JB |
1160 | { |
1161 | if (fd >= 0) | |
1162 | emacs_close (fd); | |
1163 | signal_error ("Recursive load", Fcons (found, Vloads_in_progress)); | |
1164 | } | |
3ba6fd9a RS |
1165 | record_unwind_protect (record_load_unwind, Vloads_in_progress); |
1166 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
1167 | } | |
7ee3bd7b | 1168 | |
b9598260 SM |
1169 | /* All loads are by default dynamic, unless the file itself specifies |
1170 | otherwise using a file-variable in the first line. This is bound here | |
1171 | so that it takes effect whether or not we use | |
1172 | Vload_source_file_function. */ | |
1173 | specbind (Qlexical_binding, Qnil); | |
1174 | ||
6bb6da3e AM |
1175 | /* Get the name for load-history. */ |
1176 | hist_file_name = (! NILP (Vpurify_flag) | |
1177 | ? Fconcat (2, (tmp[0] = Ffile_name_directory (file), | |
1178 | tmp[1] = Ffile_name_nondirectory (found), | |
1179 | tmp)) | |
1180 | : found) ; | |
1181 | ||
8792be66 | 1182 | version = -1; |
1bb9a689 | 1183 | |
88852d45 | 1184 | /* Check for the presence of old-style quotes and warn about them. */ |
1d064697 SM |
1185 | specbind (Qold_style_backquotes, Qnil); |
1186 | record_unwind_protect (load_warn_old_style_backquotes, file); | |
1187 | ||
72af86bd | 1188 | if (!memcmp (SDATA (found) + SBYTES (found) - 4, ".elc", 4) |
74327f7a | 1189 | || (fd >= 0 && (version = safe_to_load_p (fd)) > 0)) |
96dc0f4e MB |
1190 | /* Load .elc files directly, but not when they are |
1191 | remote and have no handler! */ | |
078e7b4a | 1192 | { |
96dc0f4e | 1193 | if (fd != -2) |
da84f340 | 1194 | { |
96dc0f4e MB |
1195 | struct stat s1, s2; |
1196 | int result; | |
da84f340 | 1197 | |
6bb6da3e | 1198 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1199 | |
8792be66 KH |
1200 | if (version < 0 |
1201 | && ! (version = safe_to_load_p (fd))) | |
96dc0f4e MB |
1202 | { |
1203 | safe_p = 0; | |
1204 | if (!load_dangerous_libraries) | |
e63304b7 DL |
1205 | { |
1206 | if (fd >= 0) | |
1207 | emacs_close (fd); | |
1208 | error ("File `%s' was not compiled in Emacs", | |
1209 | SDATA (found)); | |
1210 | } | |
beb0b7f9 | 1211 | else if (!NILP (nomessage) && !force_load_messages) |
96dc0f4e MB |
1212 | message_with_string ("File `%s' not compiled in Emacs", found, 1); |
1213 | } | |
04fc68e7 | 1214 | |
96dc0f4e MB |
1215 | compiled = 1; |
1216 | ||
eb191db2 EZ |
1217 | efound = ENCODE_FILE (found); |
1218 | ||
26fbf20b | 1219 | #ifdef DOS_NT |
96dc0f4e | 1220 | fmode = "rb"; |
26fbf20b | 1221 | #endif /* DOS_NT */ |
e5533da6 PE |
1222 | result = stat (SSDATA (efound), &s1); |
1223 | if (result == 0) | |
1224 | { | |
1225 | SSET (efound, SBYTES (efound) - 1, 0); | |
1226 | result = stat (SSDATA (efound), &s2); | |
1227 | SSET (efound, SBYTES (efound) - 1, 'c'); | |
1228 | } | |
eb191db2 | 1229 | |
d37ca623 | 1230 | if (result == 0 && s1.st_mtime < s2.st_mtime) |
96dc0f4e MB |
1231 | { |
1232 | /* Make the progress messages mention that source is newer. */ | |
1233 | newer = 1; | |
04fc68e7 | 1234 | |
96dc0f4e | 1235 | /* If we won't print another message, mention this anyway. */ |
beb0b7f9 | 1236 | if (!NILP (nomessage) && !force_load_messages) |
714d8c39 | 1237 | { |
0fc213e9 RS |
1238 | Lisp_Object msg_file; |
1239 | msg_file = Fsubstring (found, make_number (0), make_number (-1)); | |
714d8c39 | 1240 | message_with_string ("Source file `%s' newer than byte-compiled file", |
0fc213e9 | 1241 | msg_file, 1); |
714d8c39 | 1242 | } |
96dc0f4e | 1243 | } |
0fc213e9 | 1244 | UNGCPRO; |
51ac6f83 | 1245 | } |
078e7b4a | 1246 | } |
fe0e03f3 KH |
1247 | else |
1248 | { | |
1249 | /* We are loading a source file (*.el). */ | |
1250 | if (!NILP (Vload_source_file_function)) | |
1251 | { | |
7ee3bd7b | 1252 | Lisp_Object val; |
96dc0f4e MB |
1253 | |
1254 | if (fd >= 0) | |
68c45bf0 | 1255 | emacs_close (fd); |
6bb6da3e | 1256 | val = call4 (Vload_source_file_function, found, hist_file_name, |
7ee3bd7b | 1257 | NILP (noerror) ? Qnil : Qt, |
beb0b7f9 | 1258 | (NILP (nomessage) || force_load_messages) ? Qnil : Qt); |
7ee3bd7b | 1259 | return unbind_to (count, val); |
fe0e03f3 KH |
1260 | } |
1261 | } | |
078e7b4a | 1262 | |
6bb6da3e | 1263 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1264 | |
229ba775 | 1265 | #ifdef WINDOWSNT |
eb191db2 | 1266 | efound = ENCODE_FILE (found); |
35774242 EZ |
1267 | /* If we somehow got here with fd == -2, meaning the file is deemed |
1268 | to be remote, don't even try to reopen the file locally; just | |
1269 | force a failure instead. */ | |
1270 | if (fd >= 0) | |
1271 | { | |
1272 | emacs_close (fd); | |
1273 | stream = fopen (SSDATA (efound), fmode); | |
1274 | } | |
1275 | else | |
1276 | stream = NULL; | |
229ba775 EZ |
1277 | #else /* not WINDOWSNT */ |
1278 | stream = fdopen (fd, fmode); | |
1279 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
1280 | if (stream == 0) |
1281 | { | |
68c45bf0 | 1282 | emacs_close (fd); |
d5db4077 | 1283 | error ("Failure to create stdio stream for %s", SDATA (file)); |
078e7b4a JB |
1284 | } |
1285 | ||
4b104c41 | 1286 | if (! NILP (Vpurify_flag)) |
5e617bc2 | 1287 | Vpreloaded_file_list = Fcons (Fpurecopy (file), Vpreloaded_file_list); |
4b104c41 | 1288 | |
beb0b7f9 | 1289 | if (NILP (nomessage) || force_load_messages) |
04fc68e7 | 1290 | { |
da84f340 GM |
1291 | if (!safe_p) |
1292 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
1293 | file, 1); | |
1294 | else if (!compiled) | |
e28552a4 | 1295 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 1296 | else if (newer) |
e28552a4 RS |
1297 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
1298 | file, 1); | |
db5cae4b | 1299 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1300 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 1301 | } |
078e7b4a | 1302 | |
c04d9e70 | 1303 | record_unwind_protect (load_unwind, make_save_value (stream, 0)); |
d2c6be7f | 1304 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 1305 | specbind (Qload_file_name, found); |
74549846 | 1306 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
1307 | load_descriptor_list |
1308 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
2baf5e76 | 1309 | specbind (Qload_in_progress, Qt); |
b9598260 SM |
1310 | |
1311 | instream = stream; | |
1312 | if (lisp_file_lexically_bound_p (Qget_file_char)) | |
1313 | Fset (Qlexical_binding, Qt); | |
1314 | ||
ab2a47e1 | 1315 | if (! version || version >= 22) |
b883cdb2 | 1316 | readevalloop (Qget_file_char, stream, hist_file_name, |
defb1411 | 1317 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 KH |
1318 | else |
1319 | { | |
1320 | /* We can't handle a file which was compiled with | |
1321 | byte-compile-dynamic by older version of Emacs. */ | |
1322 | specbind (Qload_force_doc_strings, Qt); | |
defb1411 | 1323 | readevalloop (Qget_emacs_mule_file_char, stream, hist_file_name, |
768d4533 | 1324 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 | 1325 | } |
078e7b4a JB |
1326 | unbind_to (count, Qnil); |
1327 | ||
6bb6da3e | 1328 | /* Run any eval-after-load forms for this file */ |
428b13d6 | 1329 | if (!NILP (Ffboundp (Qdo_after_load_evaluation))) |
6bb6da3e AM |
1330 | call1 (Qdo_after_load_evaluation, hist_file_name) ; |
1331 | ||
078e7b4a JB |
1332 | UNGCPRO; |
1333 | ||
97dead2d | 1334 | xfree (saved_doc_string); |
b2a30870 RS |
1335 | saved_doc_string = 0; |
1336 | saved_doc_string_size = 0; | |
1337 | ||
70fdbb46 | 1338 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
1339 | prev_saved_doc_string = 0; |
1340 | prev_saved_doc_string_size = 0; | |
1341 | ||
beb0b7f9 | 1342 | if (!noninteractive && (NILP (nomessage) || force_load_messages)) |
04fc68e7 | 1343 | { |
da84f340 GM |
1344 | if (!safe_p) |
1345 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
1346 | file, 1); | |
1347 | else if (!compiled) | |
e28552a4 | 1348 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 1349 | else if (newer) |
e28552a4 RS |
1350 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
1351 | file, 1); | |
db5cae4b | 1352 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1353 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 1354 | } |
7ee3bd7b | 1355 | |
078e7b4a JB |
1356 | return Qt; |
1357 | } | |
1358 | ||
1359 | static Lisp_Object | |
971de7fb | 1360 | load_unwind (Lisp_Object arg) /* used as unwind-protect function in load */ |
078e7b4a | 1361 | { |
ebfe97a2 KS |
1362 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
1363 | if (stream != NULL) | |
66cd0949 YM |
1364 | { |
1365 | BLOCK_INPUT; | |
1366 | fclose (stream); | |
1367 | UNBLOCK_INPUT; | |
1368 | } | |
078e7b4a JB |
1369 | return Qnil; |
1370 | } | |
1371 | ||
d2c6be7f | 1372 | static Lisp_Object |
971de7fb | 1373 | load_descriptor_unwind (Lisp_Object oldlist) |
d2c6be7f RS |
1374 | { |
1375 | load_descriptor_list = oldlist; | |
838abf56 | 1376 | return Qnil; |
d2c6be7f RS |
1377 | } |
1378 | ||
1379 | /* Close all descriptors in use for Floads. | |
1380 | This is used when starting a subprocess. */ | |
1381 | ||
1382 | void | |
971de7fb | 1383 | close_load_descs (void) |
d2c6be7f | 1384 | { |
f3849f25 | 1385 | #ifndef WINDOWSNT |
d2c6be7f | 1386 | Lisp_Object tail; |
9beb8baa | 1387 | for (tail = load_descriptor_list; CONSP (tail); tail = XCDR (tail)) |
68c45bf0 | 1388 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 1389 | #endif |
d2c6be7f | 1390 | } |
078e7b4a JB |
1391 | \f |
1392 | static int | |
971de7fb | 1393 | complete_filename_p (Lisp_Object pathname) |
078e7b4a | 1394 | { |
4b2dd274 | 1395 | register const unsigned char *s = SDATA (pathname); |
317073d5 | 1396 | return (IS_DIRECTORY_SEP (s[0]) |
d5db4077 | 1397 | || (SCHARS (pathname) > 2 |
7c2fb837 | 1398 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2]))); |
078e7b4a JB |
1399 | } |
1400 | ||
86d00812 SM |
1401 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
1402 | doc: /* Search for FILENAME through PATH. | |
57a131fb | 1403 | Returns the file's name in absolute form, or nil if not found. |
86d00812 SM |
1404 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
1405 | file name when searching. | |
1406 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
1407 | PREDICATE can also be an integer to pass to the access(2) function, | |
aa56f361 SM |
1408 | in which case file-name-handlers are ignored. |
1409 | This function will normally skip directories, so if you want it to find | |
1410 | directories, make sure the PREDICATE function returns `dir-ok' for them. */) | |
5842a27b | 1411 | (Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate) |
86d00812 SM |
1412 | { |
1413 | Lisp_Object file; | |
1414 | int fd = openp (path, filename, suffixes, &file, predicate); | |
1415 | if (NILP (predicate) && fd > 0) | |
1416 | close (fd); | |
1417 | return file; | |
1418 | } | |
1419 | ||
aa56f361 | 1420 | static Lisp_Object Qdir_ok; |
86d00812 | 1421 | |
078e7b4a JB |
1422 | /* Search for a file whose name is STR, looking in directories |
1423 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
1424 | On success, returns a file descriptor. On failure, returns -1. |
1425 | ||
e61b9b87 | 1426 | SUFFIXES is a list of strings containing possible suffixes. |
e0f24100 | 1427 | The empty suffix is automatically added if the list is empty. |
e61b9b87 | 1428 | |
86d00812 SM |
1429 | PREDICATE non-nil means don't open the files, |
1430 | just look for one that satisfies the predicate. In this case, | |
1431 | returns 1 on success. The predicate can be a lisp function or | |
1432 | an integer to pass to `access' (in which case file-name-handlers | |
1433 | are ignored). | |
078e7b4a JB |
1434 | |
1435 | If STOREPTR is nonzero, it points to a slot where the name of | |
1436 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
1437 | nil is stored there on failure. |
1438 | ||
96dc0f4e | 1439 | If the file we find is remote, return -2 |
86d00812 | 1440 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
1441 | |
1442 | int | |
971de7fb | 1443 | openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, Lisp_Object *storeptr, Lisp_Object predicate) |
078e7b4a JB |
1444 | { |
1445 | register int fd; | |
640ee02d | 1446 | EMACS_INT fn_size = 100; |
078e7b4a JB |
1447 | char buf[100]; |
1448 | register char *fn = buf; | |
1449 | int absolute = 0; | |
640ee02d | 1450 | EMACS_INT want_length; |
74549846 | 1451 | Lisp_Object filename; |
078e7b4a | 1452 | struct stat st; |
eb191db2 EZ |
1453 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
1454 | Lisp_Object string, tail, encoded_fn; | |
640ee02d | 1455 | EMACS_INT max_suffix_len = 0; |
e61b9b87 | 1456 | |
6f8eafd1 SM |
1457 | CHECK_STRING (str); |
1458 | ||
e61b9b87 SM |
1459 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) |
1460 | { | |
f5df591a | 1461 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1462 | max_suffix_len = max (max_suffix_len, |
d5db4077 | 1463 | SBYTES (XCAR (tail))); |
e61b9b87 | 1464 | } |
078e7b4a | 1465 | |
8b9d426a | 1466 | string = filename = encoded_fn = Qnil; |
eb191db2 EZ |
1467 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1468 | ||
078e7b4a JB |
1469 | if (storeptr) |
1470 | *storeptr = Qnil; | |
1471 | ||
1472 | if (complete_filename_p (str)) | |
1473 | absolute = 1; | |
1474 | ||
e61b9b87 | 1475 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1476 | { |
e61b9b87 | 1477 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a JB |
1478 | if (!complete_filename_p (filename)) |
1479 | /* If there are non-absolute elts in PATH (eg ".") */ | |
1480 | /* Of course, this could conceivably lose if luser sets | |
1481 | default-directory to be something non-absolute... */ | |
1482 | { | |
4b4deea2 | 1483 | filename = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
078e7b4a JB |
1484 | if (!complete_filename_p (filename)) |
1485 | /* Give up on this path element! */ | |
1486 | continue; | |
1487 | } | |
1488 | ||
640ee02d | 1489 | /* Calculate maximum length of any filename made from |
078e7b4a | 1490 | this path element/specified file name and any possible suffix. */ |
640ee02d PE |
1491 | want_length = max_suffix_len + SBYTES (filename); |
1492 | if (fn_size <= want_length) | |
1493 | fn = (char *) alloca (fn_size = 100 + want_length); | |
078e7b4a | 1494 | |
078e7b4a | 1495 | /* Loop over suffixes. */ |
a74d1c97 | 1496 | for (tail = NILP (suffixes) ? Fcons (empty_unibyte_string, Qnil) : suffixes; |
e61b9b87 | 1497 | CONSP (tail); tail = XCDR (tail)) |
078e7b4a | 1498 | { |
82cb60d3 | 1499 | ptrdiff_t lsuffix = SBYTES (XCAR (tail)); |
74549846 | 1500 | Lisp_Object handler; |
eb191db2 | 1501 | int exists; |
078e7b4a | 1502 | |
c49afcd7 RS |
1503 | /* Concatenate path element/specified name with the suffix. |
1504 | If the directory starts with /:, remove that. */ | |
d5db4077 KR |
1505 | if (SCHARS (filename) > 2 |
1506 | && SREF (filename, 0) == '/' | |
1507 | && SREF (filename, 1) == ':') | |
c49afcd7 | 1508 | { |
42a5b22f | 1509 | strncpy (fn, SSDATA (filename) + 2, |
d5db4077 KR |
1510 | SBYTES (filename) - 2); |
1511 | fn[SBYTES (filename) - 2] = 0; | |
c49afcd7 RS |
1512 | } |
1513 | else | |
1514 | { | |
42a5b22f | 1515 | strncpy (fn, SSDATA (filename), |
d5db4077 KR |
1516 | SBYTES (filename)); |
1517 | fn[SBYTES (filename)] = 0; | |
c49afcd7 RS |
1518 | } |
1519 | ||
078e7b4a | 1520 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
42a5b22f | 1521 | strncat (fn, SSDATA (XCAR (tail)), lsuffix); |
eb191db2 | 1522 | |
74549846 | 1523 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1524 | /* We used to only check for handlers on non-absolute file names: |
1525 | if (absolute) | |
1526 | handler = Qnil; | |
1527 | else | |
1528 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1529 | It's not clear why that was the case and it breaks things like | |
1530 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
eb191db2 | 1531 | string = build_string (fn); |
4773b8ca | 1532 | handler = Ffind_file_name_handler (string, Qfile_exists_p); |
86d00812 SM |
1533 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1534 | { | |
1535 | if (NILP (predicate)) | |
1536 | exists = !NILP (Ffile_readable_p (string)); | |
1537 | else | |
aa56f361 SM |
1538 | { |
1539 | Lisp_Object tmp = call1 (predicate, string); | |
1540 | exists = !NILP (tmp) | |
1541 | && (EQ (tmp, Qdir_ok) | |
aa0f73d1 | 1542 | || NILP (Ffile_directory_p (string))); |
aa56f361 | 1543 | } |
74549846 RS |
1544 | |
1545 | if (exists) | |
078e7b4a JB |
1546 | { |
1547 | /* We succeeded; return this descriptor and filename. */ | |
1548 | if (storeptr) | |
eb191db2 | 1549 | *storeptr = string; |
5ef2a3c0 | 1550 | UNGCPRO; |
96dc0f4e | 1551 | return -2; |
74549846 RS |
1552 | } |
1553 | } | |
1554 | else | |
1555 | { | |
4b2dd274 | 1556 | const char *pfn; |
eb191db2 EZ |
1557 | |
1558 | encoded_fn = ENCODE_FILE (string); | |
42a5b22f | 1559 | pfn = SSDATA (encoded_fn); |
f68c809d | 1560 | exists = (stat (pfn, &st) == 0 && ! S_ISDIR (st.st_mode)); |
74549846 RS |
1561 | if (exists) |
1562 | { | |
1563 | /* Check that we can access or open it. */ | |
86d00812 SM |
1564 | if (NATNUMP (predicate)) |
1565 | fd = (access (pfn, XFASTINT (predicate)) == 0) ? 1 : -1; | |
74549846 | 1566 | else |
eb191db2 | 1567 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1568 | |
1569 | if (fd >= 0) | |
1570 | { | |
1571 | /* We succeeded; return this descriptor and filename. */ | |
1572 | if (storeptr) | |
eb191db2 | 1573 | *storeptr = string; |
74549846 RS |
1574 | UNGCPRO; |
1575 | return fd; | |
1576 | } | |
078e7b4a JB |
1577 | } |
1578 | } | |
078e7b4a | 1579 | } |
5a6e5452 | 1580 | if (absolute) |
5ef2a3c0 | 1581 | break; |
078e7b4a JB |
1582 | } |
1583 | ||
5ef2a3c0 KH |
1584 | UNGCPRO; |
1585 | return -1; | |
078e7b4a JB |
1586 | } |
1587 | ||
1588 | \f | |
ae321d28 RS |
1589 | /* Merge the list we've accumulated of globals from the current input source |
1590 | into the load_history variable. The details depend on whether | |
b502a9a1 RS |
1591 | the source has an associated file name or not. |
1592 | ||
1593 | FILENAME is the file name that we are loading from. | |
1594 | ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */ | |
ae321d28 RS |
1595 | |
1596 | static void | |
971de7fb | 1597 | build_load_history (Lisp_Object filename, int entire) |
ae321d28 RS |
1598 | { |
1599 | register Lisp_Object tail, prev, newelt; | |
1600 | register Lisp_Object tem, tem2; | |
b502a9a1 | 1601 | register int foundit = 0; |
ae321d28 RS |
1602 | |
1603 | tail = Vload_history; | |
1604 | prev = Qnil; | |
b502a9a1 | 1605 | |
86d00812 | 1606 | while (CONSP (tail)) |
ae321d28 | 1607 | { |
86d00812 | 1608 | tem = XCAR (tail); |
ae321d28 RS |
1609 | |
1610 | /* Find the feature's previous assoc list... */ | |
b502a9a1 | 1611 | if (!NILP (Fequal (filename, Fcar (tem)))) |
ae321d28 RS |
1612 | { |
1613 | foundit = 1; | |
1614 | ||
b502a9a1 RS |
1615 | /* If we're loading the entire file, remove old data. */ |
1616 | if (entire) | |
86d00812 | 1617 | { |
ae321d28 | 1618 | if (NILP (prev)) |
86d00812 | 1619 | Vload_history = XCDR (tail); |
ae321d28 | 1620 | else |
86d00812 | 1621 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1622 | } |
1623 | ||
1624 | /* Otherwise, cons on new symbols that are not already members. */ | |
1625 | else | |
1626 | { | |
1627 | tem2 = Vcurrent_load_list; | |
1628 | ||
1629 | while (CONSP (tem2)) | |
1630 | { | |
86d00812 | 1631 | newelt = XCAR (tem2); |
ae321d28 | 1632 | |
d642e4f9 | 1633 | if (NILP (Fmember (newelt, tem))) |
86d00812 SM |
1634 | Fsetcar (tail, Fcons (XCAR (tem), |
1635 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1636 | |
86d00812 | 1637 | tem2 = XCDR (tem2); |
ae321d28 RS |
1638 | QUIT; |
1639 | } | |
1640 | } | |
1641 | } | |
1642 | else | |
1643 | prev = tail; | |
86d00812 | 1644 | tail = XCDR (tail); |
ae321d28 RS |
1645 | QUIT; |
1646 | } | |
1647 | ||
b502a9a1 RS |
1648 | /* If we're loading an entire file, cons the new assoc onto the |
1649 | front of load-history, the most-recently-loaded position. Also | |
1650 | do this if we didn't find an existing member for the file. */ | |
1651 | if (entire || !foundit) | |
8a1f1537 RS |
1652 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), |
1653 | Vload_history); | |
ae321d28 RS |
1654 | } |
1655 | ||
7d383292 | 1656 | static Lisp_Object |
971de7fb | 1657 | unreadpure (Lisp_Object junk) /* Used as unwind-protect function in readevalloop */ |
078e7b4a JB |
1658 | { |
1659 | read_pure = 0; | |
1660 | return Qnil; | |
1661 | } | |
1662 | ||
94e554db | 1663 | static Lisp_Object |
971de7fb | 1664 | readevalloop_1 (Lisp_Object old) |
94e554db RS |
1665 | { |
1666 | load_convert_to_unibyte = ! NILP (old); | |
1667 | return Qnil; | |
1668 | } | |
1669 | ||
9c97398c GM |
1670 | /* Signal an `end-of-file' error, if possible with file name |
1671 | information. */ | |
1672 | ||
1673 | static void | |
971de7fb | 1674 | end_of_file_error (void) |
9c97398c | 1675 | { |
9c97398c | 1676 | if (STRINGP (Vload_file_name)) |
336d4a9c | 1677 | xsignal1 (Qend_of_file, Vload_file_name); |
9c97398c | 1678 | |
336d4a9c | 1679 | xsignal0 (Qend_of_file); |
9c97398c GM |
1680 | } |
1681 | ||
94e554db | 1682 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af | 1683 | for this invocation. |
4c03c46d | 1684 | READFUN, if non-nil, is used instead of `read'. |
1ed7b9ae RS |
1685 | |
1686 | START, END specify region to read in current buffer (from eval-region). | |
1687 | If the input is not from a buffer, they must be nil. */ | |
94e554db | 1688 | |
078e7b4a | 1689 | static void |
dd4c5104 DN |
1690 | readevalloop (Lisp_Object readcharfun, |
1691 | FILE *stream, | |
1692 | Lisp_Object sourcename, | |
dd4c5104 DN |
1693 | int printflag, |
1694 | Lisp_Object unibyte, Lisp_Object readfun, | |
1695 | Lisp_Object start, Lisp_Object end) | |
078e7b4a JB |
1696 | { |
1697 | register int c; | |
1698 | register Lisp_Object val; | |
aed13378 | 1699 | int count = SPECPDL_INDEX (); |
0a37f512 | 1700 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
49cf7ff4 | 1701 | struct buffer *b = 0; |
f38952fe | 1702 | int continue_reading_p; |
b9598260 | 1703 | Lisp_Object lex_bound; |
d11db2c8 RS |
1704 | /* Nonzero if reading an entire buffer. */ |
1705 | int whole_buffer = 0; | |
1706 | /* 1 on the first time around. */ | |
1707 | int first_sexp = 1; | |
1708 | ||
1709 | if (MARKERP (readcharfun)) | |
1710 | { | |
1711 | if (NILP (start)) | |
8878319c | 1712 | start = readcharfun; |
d11db2c8 | 1713 | } |
49cf7ff4 RS |
1714 | |
1715 | if (BUFFERP (readcharfun)) | |
1716 | b = XBUFFER (readcharfun); | |
1717 | else if (MARKERP (readcharfun)) | |
1718 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a | 1719 | |
1ed7b9ae RS |
1720 | /* We assume START is nil when input is not from a buffer. */ |
1721 | if (! NILP (start) && !b) | |
1722 | abort (); | |
1723 | ||
0a37f512 | 1724 | specbind (Qstandard_input, readcharfun); /* GCPROs readcharfun. */ |
8a1f1537 | 1725 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1726 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1727 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1728 | |
b9598260 SM |
1729 | /* If lexical binding is active (either because it was specified in |
1730 | the file's header, or via a buffer-local variable), create an empty | |
1731 | lexical environment, otherwise, turn off lexical binding. */ | |
1732 | lex_bound = find_symbol_value (Qlexical_binding); | |
f07a954e SM |
1733 | specbind (Qinternal_interpreter_environment, |
1734 | NILP (lex_bound) || EQ (lex_bound, Qunbound) | |
1735 | ? Qnil : Fcons (Qt, Qnil)); | |
b9598260 | 1736 | |
0a37f512 | 1737 | GCPRO4 (sourcename, readfun, start, end); |
ae321d28 | 1738 | |
6bb6da3e AM |
1739 | /* Try to ensure sourcename is a truename, except whilst preloading. */ |
1740 | if (NILP (Vpurify_flag) | |
91fe9496 SM |
1741 | && !NILP (sourcename) && !NILP (Ffile_name_absolute_p (sourcename)) |
1742 | && !NILP (Ffboundp (Qfile_truename))) | |
6bb6da3e AM |
1743 | sourcename = call1 (Qfile_truename, sourcename) ; |
1744 | ||
ae321d28 RS |
1745 | LOADHIST_ATTACH (sourcename); |
1746 | ||
f38952fe GM |
1747 | continue_reading_p = 1; |
1748 | while (continue_reading_p) | |
078e7b4a | 1749 | { |
4c03c46d KS |
1750 | int count1 = SPECPDL_INDEX (); |
1751 | ||
4b4deea2 | 1752 | if (b != 0 && NILP (BVAR (b, name))) |
49cf7ff4 RS |
1753 | error ("Reading from killed buffer"); |
1754 | ||
4c03c46d KS |
1755 | if (!NILP (start)) |
1756 | { | |
721b7d9e | 1757 | /* Switch to the buffer we are reading from. */ |
4c03c46d | 1758 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e RS |
1759 | set_buffer_internal (b); |
1760 | ||
1761 | /* Save point in it. */ | |
4c03c46d | 1762 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e | 1763 | /* Save ZV in it. */ |
4c03c46d | 1764 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
721b7d9e RS |
1765 | /* Those get unbound after we read one expression. */ |
1766 | ||
1767 | /* Set point and ZV around stuff to be read. */ | |
4c03c46d | 1768 | Fgoto_char (start); |
d11db2c8 RS |
1769 | if (!NILP (end)) |
1770 | Fnarrow_to_region (make_number (BEGV), end); | |
1771 | ||
1772 | /* Just for cleanliness, convert END to a marker | |
1773 | if it is an integer. */ | |
1774 | if (INTEGERP (end)) | |
1775 | end = Fpoint_max_marker (); | |
4c03c46d KS |
1776 | } |
1777 | ||
d11db2c8 RS |
1778 | /* On the first cycle, we can easily test here |
1779 | whether we are reading the whole buffer. */ | |
1780 | if (b && first_sexp) | |
1781 | whole_buffer = (PT == BEG && ZV == Z); | |
1782 | ||
078e7b4a | 1783 | instream = stream; |
4c03c46d | 1784 | read_next: |
078e7b4a JB |
1785 | c = READCHAR; |
1786 | if (c == ';') | |
1787 | { | |
1788 | while ((c = READCHAR) != '\n' && c != -1); | |
4c03c46d KS |
1789 | goto read_next; |
1790 | } | |
1791 | if (c < 0) | |
1792 | { | |
1793 | unbind_to (count1, Qnil); | |
1794 | break; | |
078e7b4a | 1795 | } |
6069d957 RS |
1796 | |
1797 | /* Ignore whitespace here, so we can detect eof. */ | |
adef3de7 | 1798 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' |
ed497dd4 | 1799 | || c == 0xa0) /* NBSP */ |
4c03c46d | 1800 | goto read_next; |
078e7b4a | 1801 | |
265a9e55 | 1802 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a JB |
1803 | { |
1804 | record_unwind_protect (unreadpure, Qnil); | |
1805 | val = read_list (-1, readcharfun); | |
078e7b4a JB |
1806 | } |
1807 | else | |
1808 | { | |
1809 | UNREAD (c); | |
4ad679f9 | 1810 | read_objects = Qnil; |
f38952fe GM |
1811 | if (!NILP (readfun)) |
1812 | { | |
1813 | val = call1 (readfun, readcharfun); | |
1814 | ||
1815 | /* If READCHARFUN has set point to ZV, we should | |
1816 | stop reading, even if the form read sets point | |
1817 | to a different value when evaluated. */ | |
1818 | if (BUFFERP (readcharfun)) | |
1819 | { | |
0902fe45 PE |
1820 | struct buffer *buf = XBUFFER (readcharfun); |
1821 | if (BUF_PT (buf) == BUF_ZV (buf)) | |
f38952fe GM |
1822 | continue_reading_p = 0; |
1823 | } | |
1824 | } | |
976350af | 1825 | else if (! NILP (Vload_read_function)) |
84a15045 | 1826 | val = call1 (Vload_read_function, readcharfun); |
976350af | 1827 | else |
abb13b09 | 1828 | val = read_internal_start (readcharfun, Qnil, Qnil); |
078e7b4a JB |
1829 | } |
1830 | ||
4c03c46d KS |
1831 | if (!NILP (start) && continue_reading_p) |
1832 | start = Fpoint_marker (); | |
d11db2c8 RS |
1833 | |
1834 | /* Restore saved point and BEGV. */ | |
4c03c46d KS |
1835 | unbind_to (count1, Qnil); |
1836 | ||
d11db2c8 | 1837 | /* Now eval what we just read. */ |
defb1411 | 1838 | val = eval_sub (val); |
f38952fe | 1839 | |
078e7b4a JB |
1840 | if (printflag) |
1841 | { | |
1842 | Vvalues = Fcons (val, Vvalues); | |
1843 | if (EQ (Vstandard_output, Qt)) | |
1844 | Fprin1 (val, Qnil); | |
1845 | else | |
1846 | Fprint (val, Qnil); | |
1847 | } | |
d11db2c8 RS |
1848 | |
1849 | first_sexp = 0; | |
078e7b4a JB |
1850 | } |
1851 | ||
8878319c | 1852 | build_load_history (sourcename, |
d11db2c8 | 1853 | stream || whole_buffer); |
b502a9a1 | 1854 | |
ae321d28 RS |
1855 | UNGCPRO; |
1856 | ||
078e7b4a JB |
1857 | unbind_to (count, Qnil); |
1858 | } | |
1859 | ||
1076254d | 1860 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 | 1861 | doc: /* Execute the current buffer as Lisp code. |
72097cd9 CY |
1862 | When called from a Lisp program (i.e., not interactively), this |
1863 | function accepts up to five optional arguments: | |
5de38842 PJ |
1864 | BUFFER is the buffer to evaluate (nil means use current buffer). |
1865 | PRINTFLAG controls printing of output: | |
72097cd9 CY |
1866 | A value of nil means discard it; anything else is stream for print. |
1867 | FILENAME specifies the file name to use for `load-history'. | |
1868 | UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this | |
1869 | invocation. | |
1870 | DO-ALLOW-PRINT, if non-nil, specifies that `print' and related | |
1871 | functions should work normally even if PRINTFLAG is nil. | |
5de38842 PJ |
1872 | |
1873 | This function preserves the position of point. */) | |
5842a27b | 1874 | (Lisp_Object buffer, Lisp_Object printflag, Lisp_Object filename, Lisp_Object unibyte, Lisp_Object do_allow_print) |
228d4b1c | 1875 | { |
aed13378 | 1876 | int count = SPECPDL_INDEX (); |
228d4b1c JA |
1877 | Lisp_Object tem, buf; |
1878 | ||
9391b698 | 1879 | if (NILP (buffer)) |
228d4b1c JA |
1880 | buf = Fcurrent_buffer (); |
1881 | else | |
9391b698 | 1882 | buf = Fget_buffer (buffer); |
dfdb645c | 1883 | if (NILP (buf)) |
13febd85 | 1884 | error ("No such buffer"); |
228d4b1c | 1885 | |
1076254d | 1886 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1887 | tem = Qsymbolp; |
1888 | else | |
1889 | tem = printflag; | |
13febd85 RS |
1890 | |
1891 | if (NILP (filename)) | |
4b4deea2 | 1892 | filename = BVAR (XBUFFER (buf), filename); |
13febd85 | 1893 | |
3f39f996 | 1894 | specbind (Qeval_buffer_list, Fcons (buf, Veval_buffer_list)); |
228d4b1c JA |
1895 | specbind (Qstandard_output, tem); |
1896 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
bf1c0f27 | 1897 | BUF_TEMP_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); |
7200d79c | 1898 | specbind (Qlexical_binding, lisp_file_lexically_bound_p (buf) ? Qt : Qnil); |
defb1411 | 1899 | readevalloop (buf, 0, filename, |
4c03c46d | 1900 | !NILP (printflag), unibyte, Qnil, Qnil, Qnil); |
cb09ab7a | 1901 | unbind_to (count, Qnil); |
228d4b1c JA |
1902 | |
1903 | return Qnil; | |
1904 | } | |
1905 | ||
976350af | 1906 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1907 | doc: /* Execute the region as Lisp code. |
1908 | When called from programs, expects two arguments, | |
1909 | giving starting and ending indices in the current buffer | |
1910 | of the text to be executed. | |
1911 | Programs can pass third argument PRINTFLAG which controls output: | |
51d8b30e | 1912 | A value of nil means discard it; anything else is stream for printing it. |
5de38842 PJ |
1913 | Also the fourth argument READ-FUNCTION, if non-nil, is used |
1914 | instead of `read' to read each expression. It gets one argument | |
1915 | which is the input stream for reading characters. | |
1916 | ||
1917 | This function does not move point. */) | |
5842a27b | 1918 | (Lisp_Object start, Lisp_Object end, Lisp_Object printflag, Lisp_Object read_function) |
078e7b4a | 1919 | { |
e4769531 | 1920 | /* FIXME: Do the eval-sexp-add-defvars dance! */ |
aed13378 | 1921 | int count = SPECPDL_INDEX (); |
ae321d28 RS |
1922 | Lisp_Object tem, cbuf; |
1923 | ||
1924 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1925 | |
265a9e55 | 1926 | if (NILP (printflag)) |
078e7b4a JB |
1927 | tem = Qsymbolp; |
1928 | else | |
1929 | tem = printflag; | |
1930 | specbind (Qstandard_output, tem); | |
3f39f996 | 1931 | specbind (Qeval_buffer_list, Fcons (cbuf, Veval_buffer_list)); |
078e7b4a | 1932 | |
4c03c46d | 1933 | /* readevalloop calls functions which check the type of start and end. */ |
f619ad4c | 1934 | readevalloop (cbuf, 0, BVAR (XBUFFER (cbuf), filename), |
4c03c46d KS |
1935 | !NILP (printflag), Qnil, read_function, |
1936 | start, end); | |
078e7b4a JB |
1937 | |
1938 | return unbind_to (count, Qnil); | |
1939 | } | |
1940 | ||
078e7b4a | 1941 | \f |
a7ca3326 | 1942 | DEFUN ("read", Fread, Sread, 0, 1, 0, |
5de38842 PJ |
1943 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1944 | If STREAM is nil, use the value of `standard-input' (which see). | |
1945 | STREAM or the value of `standard-input' may be: | |
1946 | a buffer (read from point and advance it) | |
1947 | a marker (read from where it points and advance it) | |
1948 | a function (call it with no arguments for each character, | |
1949 | call it with a char as argument to push a char back) | |
1950 | a string (takes text from string, starting at the beginning) | |
1951 | t (read text line using minibuffer and use it, or read from | |
1952 | standard input in batch mode). */) | |
5842a27b | 1953 | (Lisp_Object stream) |
078e7b4a | 1954 | { |
5be02dff KH |
1955 | if (NILP (stream)) |
1956 | stream = Vstandard_input; | |
1957 | if (EQ (stream, Qt)) | |
1958 | stream = Qread_char; | |
5be02dff | 1959 | if (EQ (stream, Qread_char)) |
078e7b4a | 1960 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1961 | |
abb13b09 | 1962 | return read_internal_start (stream, Qnil, Qnil); |
078e7b4a JB |
1963 | } |
1964 | ||
a7ca3326 | 1965 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, |
5de38842 PJ |
1966 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1967 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
a4824228 | 1968 | FINAL-STRING-INDEX is an integer giving the position of the next |
a239d4e9 | 1969 | remaining character in STRING. |
5de38842 PJ |
1970 | START and END optionally delimit a substring of STRING from which to read; |
1971 | they default to 0 and (length STRING) respectively. */) | |
5842a27b | 1972 | (Lisp_Object string, Lisp_Object start, Lisp_Object end) |
078e7b4a | 1973 | { |
2530ceaf | 1974 | Lisp_Object ret; |
b7826503 | 1975 | CHECK_STRING (string); |
2530ceaf CW |
1976 | /* read_internal_start sets read_from_string_index. */ |
1977 | ret = read_internal_start (string, start, end); | |
5135ab39 | 1978 | return Fcons (ret, make_number (read_from_string_index)); |
abb13b09 | 1979 | } |
078e7b4a | 1980 | |
abb13b09 CW |
1981 | /* Function to set up the global context we need in toplevel read |
1982 | calls. */ | |
1983 | static Lisp_Object | |
971de7fb | 1984 | read_internal_start (Lisp_Object stream, Lisp_Object start, Lisp_Object end) |
b8ce688b | 1985 | /* start, end only used when stream is a string. */ |
abb13b09 CW |
1986 | { |
1987 | Lisp_Object retval; | |
078e7b4a | 1988 | |
abb13b09 | 1989 | readchar_count = 0; |
17634846 | 1990 | new_backquote_flag = 0; |
4ad679f9 | 1991 | read_objects = Qnil; |
abb13b09 CW |
1992 | if (EQ (Vread_with_symbol_positions, Qt) |
1993 | || EQ (Vread_with_symbol_positions, stream)) | |
1994 | Vread_symbol_positions_list = Qnil; | |
1995 | ||
8f924df7 KH |
1996 | if (STRINGP (stream) |
1997 | || ((CONSP (stream) && STRINGP (XCAR (stream))))) | |
abb13b09 | 1998 | { |
da43f021 | 1999 | EMACS_INT startval, endval; |
8f924df7 | 2000 | Lisp_Object string; |
078e7b4a | 2001 | |
8f924df7 KH |
2002 | if (STRINGP (stream)) |
2003 | string = stream; | |
2004 | else | |
2005 | string = XCAR (stream); | |
078e7b4a | 2006 | |
abb13b09 | 2007 | if (NILP (end)) |
8f924df7 | 2008 | endval = SCHARS (string); |
abb13b09 CW |
2009 | else |
2010 | { | |
2011 | CHECK_NUMBER (end); | |
2012 | endval = XINT (end); | |
8f924df7 KH |
2013 | if (endval < 0 || endval > SCHARS (string)) |
2014 | args_out_of_range (string, end); | |
abb13b09 | 2015 | } |
17634846 | 2016 | |
abb13b09 CW |
2017 | if (NILP (start)) |
2018 | startval = 0; | |
2019 | else | |
2020 | { | |
2021 | CHECK_NUMBER (start); | |
2022 | startval = XINT (start); | |
2023 | if (startval < 0 || startval > endval) | |
8f924df7 | 2024 | args_out_of_range (string, start); |
abb13b09 CW |
2025 | } |
2026 | read_from_string_index = startval; | |
8f924df7 | 2027 | read_from_string_index_byte = string_char_to_byte (string, startval); |
abb13b09 CW |
2028 | read_from_string_limit = endval; |
2029 | } | |
177c0ea7 | 2030 | |
abb13b09 CW |
2031 | retval = read0 (stream); |
2032 | if (EQ (Vread_with_symbol_positions, Qt) | |
2033 | || EQ (Vread_with_symbol_positions, stream)) | |
2034 | Vread_symbol_positions_list = Fnreverse (Vread_symbol_positions_list); | |
2035 | return retval; | |
078e7b4a JB |
2036 | } |
2037 | \f | |
336d4a9c KS |
2038 | |
2039 | /* Signal Qinvalid_read_syntax error. | |
2040 | S is error string of length N (if > 0) */ | |
2041 | ||
2042 | static void | |
e4d29b33 | 2043 | invalid_syntax (const char *s) |
336d4a9c | 2044 | { |
e4d29b33 | 2045 | xsignal1 (Qinvalid_read_syntax, build_string (s)); |
336d4a9c KS |
2046 | } |
2047 | ||
2048 | ||
6428369f KH |
2049 | /* Use this for recursive reads, in contexts where internal tokens |
2050 | are not allowed. */ | |
e28552a4 | 2051 | |
078e7b4a | 2052 | static Lisp_Object |
971de7fb | 2053 | read0 (Lisp_Object readcharfun) |
078e7b4a JB |
2054 | { |
2055 | register Lisp_Object val; | |
e28552a4 | 2056 | int c; |
078e7b4a | 2057 | |
17634846 | 2058 | val = read1 (readcharfun, &c, 0); |
336d4a9c KS |
2059 | if (!c) |
2060 | return val; | |
078e7b4a | 2061 | |
336d4a9c KS |
2062 | xsignal1 (Qinvalid_read_syntax, |
2063 | Fmake_string (make_number (1), make_number (c))); | |
078e7b4a JB |
2064 | } |
2065 | \f | |
82cb60d3 | 2066 | static ptrdiff_t read_buffer_size; |
078e7b4a JB |
2067 | static char *read_buffer; |
2068 | ||
f6f79b37 | 2069 | /* Read a \-escape sequence, assuming we already read the `\'. |
8f924df7 | 2070 | If the escape sequence forces unibyte, return eight-bit char. */ |
6f7f43d5 | 2071 | |
078e7b4a | 2072 | static int |
971de7fb | 2073 | read_escape (Lisp_Object readcharfun, int stringp) |
078e7b4a JB |
2074 | { |
2075 | register int c = READCHAR; | |
9735b9ce | 2076 | /* \u allows up to four hex digits, \U up to eight. Default to the |
fffa137c | 2077 | behavior for \u, and change this value in the case that \U is seen. */ |
71b169b8 | 2078 | int unicode_hex_count = 4; |
f6f79b37 | 2079 | |
078e7b4a JB |
2080 | switch (c) |
2081 | { | |
f3849f25 | 2082 | case -1: |
da3b886d | 2083 | end_of_file_error (); |
f3849f25 | 2084 | |
078e7b4a | 2085 | case 'a': |
265a9e55 | 2086 | return '\007'; |
078e7b4a JB |
2087 | case 'b': |
2088 | return '\b'; | |
f405a585 RS |
2089 | case 'd': |
2090 | return 0177; | |
078e7b4a JB |
2091 | case 'e': |
2092 | return 033; | |
2093 | case 'f': | |
2094 | return '\f'; | |
2095 | case 'n': | |
2096 | return '\n'; | |
2097 | case 'r': | |
2098 | return '\r'; | |
2099 | case 't': | |
2100 | return '\t'; | |
2101 | case 'v': | |
2102 | return '\v'; | |
2103 | case '\n': | |
2104 | return -1; | |
e28552a4 | 2105 | case ' ': |
e7fc914b KH |
2106 | if (stringp) |
2107 | return -1; | |
2108 | return ' '; | |
078e7b4a JB |
2109 | |
2110 | case 'M': | |
2111 | c = READCHAR; | |
2112 | if (c != '-') | |
2113 | error ("Invalid escape character syntax"); | |
2114 | c = READCHAR; | |
2115 | if (c == '\\') | |
8792be66 | 2116 | c = read_escape (readcharfun, 0); |
7bd279cd | 2117 | return c | meta_modifier; |
f405a585 RS |
2118 | |
2119 | case 'S': | |
2120 | c = READCHAR; | |
2121 | if (c != '-') | |
2122 | error ("Invalid escape character syntax"); | |
2123 | c = READCHAR; | |
2124 | if (c == '\\') | |
8792be66 | 2125 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2126 | return c | shift_modifier; |
2127 | ||
2128 | case 'H': | |
2129 | c = READCHAR; | |
2130 | if (c != '-') | |
2131 | error ("Invalid escape character syntax"); | |
2132 | c = READCHAR; | |
2133 | if (c == '\\') | |
8792be66 | 2134 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2135 | return c | hyper_modifier; |
2136 | ||
2137 | case 'A': | |
2138 | c = READCHAR; | |
2139 | if (c != '-') | |
2140 | error ("Invalid escape character syntax"); | |
2141 | c = READCHAR; | |
2142 | if (c == '\\') | |
8792be66 | 2143 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2144 | return c | alt_modifier; |
2145 | ||
2146 | case 's': | |
2147 | c = READCHAR; | |
4d7528d0 | 2148 | if (stringp || c != '-') |
010b7eac RS |
2149 | { |
2150 | UNREAD (c); | |
2151 | return ' '; | |
2152 | } | |
7bd279cd RS |
2153 | c = READCHAR; |
2154 | if (c == '\\') | |
8792be66 | 2155 | c = read_escape (readcharfun, 0); |
7bd279cd | 2156 | return c | super_modifier; |
078e7b4a JB |
2157 | |
2158 | case 'C': | |
2159 | c = READCHAR; | |
2160 | if (c != '-') | |
2161 | error ("Invalid escape character syntax"); | |
2162 | case '^': | |
2163 | c = READCHAR; | |
2164 | if (c == '\\') | |
8792be66 | 2165 | c = read_escape (readcharfun, 0); |
164d590d KH |
2166 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
2167 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
2168 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
2169 | return c | ctrl_modifier; | |
f405a585 RS |
2170 | /* ASCII control chars are made from letters (both cases), |
2171 | as well as the non-letters within 0100...0137. */ | |
2172 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
2173 | return (c & (037 | ~0177)); | |
2174 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
2175 | return (c & (037 | ~0177)); | |
078e7b4a | 2176 | else |
7bd279cd | 2177 | return c | ctrl_modifier; |
078e7b4a JB |
2178 | |
2179 | case '0': | |
2180 | case '1': | |
2181 | case '2': | |
2182 | case '3': | |
2183 | case '4': | |
2184 | case '5': | |
2185 | case '6': | |
2186 | case '7': | |
2187 | /* An octal escape, as in ANSI C. */ | |
2188 | { | |
2189 | register int i = c - '0'; | |
2190 | register int count = 0; | |
2191 | while (++count < 3) | |
2192 | { | |
2193 | if ((c = READCHAR) >= '0' && c <= '7') | |
2194 | { | |
2195 | i *= 8; | |
2196 | i += c - '0'; | |
2197 | } | |
2198 | else | |
2199 | { | |
2200 | UNREAD (c); | |
2201 | break; | |
2202 | } | |
2203 | } | |
177c0ea7 | 2204 | |
8f924df7 | 2205 | if (i >= 0x80 && i < 0x100) |
8792be66 | 2206 | i = BYTE8_TO_CHAR (i); |
078e7b4a JB |
2207 | return i; |
2208 | } | |
2209 | ||
2210 | case 'x': | |
2211 | /* A hex escape, as in ANSI C. */ | |
2212 | { | |
0324f3af | 2213 | unsigned int i = 0; |
1571601b | 2214 | int count = 0; |
078e7b4a JB |
2215 | while (1) |
2216 | { | |
2217 | c = READCHAR; | |
2218 | if (c >= '0' && c <= '9') | |
2219 | { | |
2220 | i *= 16; | |
2221 | i += c - '0'; | |
2222 | } | |
2223 | else if ((c >= 'a' && c <= 'f') | |
2224 | || (c >= 'A' && c <= 'F')) | |
2225 | { | |
2226 | i *= 16; | |
2227 | if (c >= 'a' && c <= 'f') | |
2228 | i += c - 'a' + 10; | |
2229 | else | |
2230 | i += c - 'A' + 10; | |
2231 | } | |
2232 | else | |
2233 | { | |
2234 | UNREAD (c); | |
2235 | break; | |
2236 | } | |
0324f3af PE |
2237 | /* Allow hex escapes as large as ?\xfffffff, because some |
2238 | packages use them to denote characters with modifiers. */ | |
2239 | if ((CHAR_META | (CHAR_META - 1)) < i) | |
39019e54 | 2240 | error ("Hex character out of range: \\x%x...", i); |
82cb60d3 | 2241 | count += count < 3; |
078e7b4a | 2242 | } |
f6f79b37 | 2243 | |
1571601b | 2244 | if (count < 3 && i >= 0x80) |
8792be66 | 2245 | return BYTE8_TO_CHAR (i); |
078e7b4a JB |
2246 | return i; |
2247 | } | |
2248 | ||
71b169b8 EZ |
2249 | case 'U': |
2250 | /* Post-Unicode-2.0: Up to eight hex chars. */ | |
2251 | unicode_hex_count = 8; | |
2252 | case 'u': | |
2253 | ||
9735b9ce | 2254 | /* A Unicode escape. We only permit them in strings and characters, |
71b169b8 EZ |
2255 | not arbitrarily in the source code, as in some other languages. */ |
2256 | { | |
a808f22d | 2257 | unsigned int i = 0; |
71b169b8 | 2258 | int count = 0; |
71b169b8 EZ |
2259 | |
2260 | while (++count <= unicode_hex_count) | |
2261 | { | |
2262 | c = READCHAR; | |
a3ac22e4 | 2263 | /* isdigit and isalpha may be locale-specific, which we don't |
71b169b8 EZ |
2264 | want. */ |
2265 | if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); | |
2266 | else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
2267 | else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
2268 | else | |
39019e54 | 2269 | error ("Non-hex digit used for Unicode escape"); |
71b169b8 | 2270 | } |
a808f22d KH |
2271 | if (i > 0x10FFFF) |
2272 | error ("Non-Unicode character: 0x%x", i); | |
7ea7f636 | 2273 | return i; |
71b169b8 EZ |
2274 | } |
2275 | ||
078e7b4a JB |
2276 | default: |
2277 | return c; | |
2278 | } | |
2279 | } | |
2280 | ||
a108c10b PE |
2281 | /* Return the digit that CHARACTER stands for in the given BASE. |
2282 | Return -1 if CHARACTER is out of range for BASE, | |
2283 | and -2 if CHARACTER is not valid for any supported BASE. */ | |
2284 | static inline int | |
2285 | digit_to_number (int character, int base) | |
2286 | { | |
2287 | int digit; | |
2288 | ||
2289 | if ('0' <= character && character <= '9') | |
2290 | digit = character - '0'; | |
2291 | else if ('a' <= character && character <= 'z') | |
2292 | digit = character - 'a' + 10; | |
2293 | else if ('A' <= character && character <= 'Z') | |
2294 | digit = character - 'A' + 10; | |
2295 | else | |
2296 | return -2; | |
2297 | ||
2298 | return digit < base ? digit : -1; | |
2299 | } | |
2300 | ||
bf5d1a17 GM |
2301 | /* Read an integer in radix RADIX using READCHARFUN to read |
2302 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
2303 | read error is signaled . Value is the integer read. Signals an | |
2304 | error if encountering invalid read syntax or if RADIX is out of | |
2305 | range. */ | |
2306 | ||
2307 | static Lisp_Object | |
8b9ac8b4 | 2308 | read_integer (Lisp_Object readcharfun, EMACS_INT radix) |
bf5d1a17 | 2309 | { |
8b9ac8b4 PE |
2310 | /* Room for sign, leading 0, other digits, trailing null byte. |
2311 | Also, room for invalid syntax diagnostic. */ | |
2312 | char buf[max (1 + 1 + sizeof (uintmax_t) * CHAR_BIT + 1, | |
2313 | sizeof "integer, radix " + INT_STRLEN_BOUND (EMACS_INT))]; | |
a108c10b PE |
2314 | |
2315 | int valid = -1; /* 1 if valid, 0 if not, -1 if incomplete. */ | |
bf5d1a17 GM |
2316 | |
2317 | if (radix < 2 || radix > 36) | |
a108c10b | 2318 | valid = 0; |
bf5d1a17 GM |
2319 | else |
2320 | { | |
a108c10b PE |
2321 | char *p = buf; |
2322 | int c, digit; | |
bf5d1a17 GM |
2323 | |
2324 | c = READCHAR; | |
a108c10b | 2325 | if (c == '-' || c == '+') |
bf5d1a17 | 2326 | { |
a108c10b | 2327 | *p++ = c; |
bf5d1a17 | 2328 | c = READCHAR; |
bf5d1a17 | 2329 | } |
177c0ea7 | 2330 | |
a108c10b | 2331 | if (c == '0') |
bf5d1a17 | 2332 | { |
a108c10b PE |
2333 | *p++ = c; |
2334 | valid = 1; | |
bf5d1a17 | 2335 | |
a108c10b PE |
2336 | /* Ignore redundant leading zeros, so the buffer doesn't |
2337 | fill up with them. */ | |
2338 | do | |
2339 | c = READCHAR; | |
2340 | while (c == '0'); | |
2341 | } | |
2342 | ||
2343 | while (-1 <= (digit = digit_to_number (c, radix))) | |
2344 | { | |
2345 | if (digit == -1) | |
2346 | valid = 0; | |
2347 | if (valid < 0) | |
2348 | valid = 1; | |
2349 | ||
2350 | if (p < buf + sizeof buf - 1) | |
2351 | *p++ = c; | |
2352 | else | |
2353 | valid = 0; | |
bf5d1a17 | 2354 | |
bf5d1a17 GM |
2355 | c = READCHAR; |
2356 | } | |
a108c10b | 2357 | |
0a6a104b | 2358 | UNREAD (c); |
a108c10b | 2359 | *p = '\0'; |
bf5d1a17 GM |
2360 | } |
2361 | ||
a108c10b | 2362 | if (! valid) |
bf5d1a17 | 2363 | { |
8b9ac8b4 | 2364 | sprintf (buf, "integer, radix %"pI"d", radix); |
e4d29b33 | 2365 | invalid_syntax (buf); |
bf5d1a17 GM |
2366 | } |
2367 | ||
a108c10b | 2368 | return string_to_number (buf, radix, 0); |
bf5d1a17 GM |
2369 | } |
2370 | ||
2371 | ||
6428369f KH |
2372 | /* If the next token is ')' or ']' or '.', we store that character |
2373 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
2374 | zero in *PCH and we read and return one lisp object. |
2375 | ||
2376 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
2377 | ||
078e7b4a | 2378 | static Lisp_Object |
971de7fb | 2379 | read1 (register Lisp_Object readcharfun, int *pch, int first_in_list) |
078e7b4a JB |
2380 | { |
2381 | register int c; | |
3c346cc3 | 2382 | unsigned uninterned_symbol = 0; |
1202434b | 2383 | int multibyte; |
4ad679f9 | 2384 | |
6428369f | 2385 | *pch = 0; |
8792be66 | 2386 | load_each_byte = 0; |
078e7b4a JB |
2387 | |
2388 | retry: | |
2389 | ||
1202434b | 2390 | c = READCHAR_REPORT_MULTIBYTE (&multibyte); |
9c97398c GM |
2391 | if (c < 0) |
2392 | end_of_file_error (); | |
078e7b4a JB |
2393 | |
2394 | switch (c) | |
2395 | { | |
2396 | case '(': | |
2397 | return read_list (0, readcharfun); | |
2398 | ||
2399 | case '[': | |
c15cfd1f | 2400 | return read_vector (readcharfun, 0); |
078e7b4a JB |
2401 | |
2402 | case ')': | |
2403 | case ']': | |
078e7b4a | 2404 | { |
6428369f KH |
2405 | *pch = c; |
2406 | return Qnil; | |
078e7b4a JB |
2407 | } |
2408 | ||
2409 | case '#': | |
200f684e | 2410 | c = READCHAR; |
f19a0f5b TZ |
2411 | if (c == 's') |
2412 | { | |
2413 | c = READCHAR; | |
2414 | if (c == '(') | |
2415 | { | |
2416 | /* Accept extended format for hashtables (extensible to | |
2417 | other types), e.g. | |
2418 | #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */ | |
2419 | Lisp_Object tmp = read_list (0, readcharfun); | |
2420 | Lisp_Object head = CAR_SAFE (tmp); | |
2421 | Lisp_Object data = Qnil; | |
2422 | Lisp_Object val = Qnil; | |
2423 | /* The size is 2 * number of allowed keywords to | |
2424 | make-hash-table. */ | |
9735b9ce | 2425 | Lisp_Object params[10]; |
f19a0f5b TZ |
2426 | Lisp_Object ht; |
2427 | Lisp_Object key = Qnil; | |
2428 | int param_count = 0; | |
9735b9ce | 2429 | |
f19a0f5b TZ |
2430 | if (!EQ (head, Qhash_table)) |
2431 | error ("Invalid extended read marker at head of #s list " | |
2432 | "(only hash-table allowed)"); | |
9735b9ce | 2433 | |
f19a0f5b TZ |
2434 | tmp = CDR_SAFE (tmp); |
2435 | ||
2436 | /* This is repetitive but fast and simple. */ | |
2437 | params[param_count] = QCsize; | |
2438 | params[param_count+1] = Fplist_get (tmp, Qsize); | |
5721b4ed AS |
2439 | if (!NILP (params[param_count + 1])) |
2440 | param_count += 2; | |
f19a0f5b TZ |
2441 | |
2442 | params[param_count] = QCtest; | |
2443 | params[param_count+1] = Fplist_get (tmp, Qtest); | |
5721b4ed AS |
2444 | if (!NILP (params[param_count + 1])) |
2445 | param_count += 2; | |
f19a0f5b TZ |
2446 | |
2447 | params[param_count] = QCweakness; | |
2448 | params[param_count+1] = Fplist_get (tmp, Qweakness); | |
5721b4ed AS |
2449 | if (!NILP (params[param_count + 1])) |
2450 | param_count += 2; | |
f19a0f5b TZ |
2451 | |
2452 | params[param_count] = QCrehash_size; | |
2453 | params[param_count+1] = Fplist_get (tmp, Qrehash_size); | |
5721b4ed AS |
2454 | if (!NILP (params[param_count + 1])) |
2455 | param_count += 2; | |
f19a0f5b TZ |
2456 | |
2457 | params[param_count] = QCrehash_threshold; | |
2458 | params[param_count+1] = Fplist_get (tmp, Qrehash_threshold); | |
5721b4ed AS |
2459 | if (!NILP (params[param_count + 1])) |
2460 | param_count += 2; | |
f19a0f5b TZ |
2461 | |
2462 | /* This is the hashtable data. */ | |
2463 | data = Fplist_get (tmp, Qdata); | |
2464 | ||
2465 | /* Now use params to make a new hashtable and fill it. */ | |
2466 | ht = Fmake_hash_table (param_count, params); | |
9735b9ce | 2467 | |
f19a0f5b TZ |
2468 | while (CONSP (data)) |
2469 | { | |
2470 | key = XCAR (data); | |
2471 | data = XCDR (data); | |
2472 | if (!CONSP (data)) | |
2473 | error ("Odd number of elements in hashtable data"); | |
2474 | val = XCAR (data); | |
2475 | data = XCDR (data); | |
2476 | Fputhash (key, val, ht); | |
2477 | } | |
9735b9ce | 2478 | |
f19a0f5b TZ |
2479 | return ht; |
2480 | } | |
5721b4ed | 2481 | UNREAD (c); |
e4d29b33 | 2482 | invalid_syntax ("#"); |
f19a0f5b | 2483 | } |
c2390933 RS |
2484 | if (c == '^') |
2485 | { | |
2486 | c = READCHAR; | |
2487 | if (c == '[') | |
2488 | { | |
2489 | Lisp_Object tmp; | |
c15cfd1f | 2490 | tmp = read_vector (readcharfun, 0); |
77b37c05 | 2491 | if (ASIZE (tmp) < CHAR_TABLE_STANDARD_SLOTS) |
c2390933 | 2492 | error ("Invalid size char-table"); |
985773c9 | 2493 | XSETPVECTYPE (XVECTOR (tmp), PVEC_CHAR_TABLE); |
c2390933 RS |
2494 | return tmp; |
2495 | } | |
3701b5de KH |
2496 | else if (c == '^') |
2497 | { | |
2498 | c = READCHAR; | |
2499 | if (c == '[') | |
2500 | { | |
2501 | Lisp_Object tmp; | |
82cb60d3 | 2502 | EMACS_INT depth, size; |
8f924df7 | 2503 | |
c15cfd1f | 2504 | tmp = read_vector (readcharfun, 0); |
1571601b KH |
2505 | if (!INTEGERP (AREF (tmp, 0))) |
2506 | error ("Invalid depth in char-table"); | |
2507 | depth = XINT (AREF (tmp, 0)); | |
2508 | if (depth < 1 || depth > 3) | |
2509 | error ("Invalid depth in char-table"); | |
77b37c05 | 2510 | size = ASIZE (tmp) - 2; |
1571601b | 2511 | if (chartab_size [depth] != size) |
3701b5de | 2512 | error ("Invalid size char-table"); |
985773c9 | 2513 | XSETPVECTYPE (XVECTOR (tmp), PVEC_SUB_CHAR_TABLE); |
3701b5de KH |
2514 | return tmp; |
2515 | } | |
e4d29b33 | 2516 | invalid_syntax ("#^^"); |
3701b5de | 2517 | } |
e4d29b33 | 2518 | invalid_syntax ("#^"); |
c2390933 RS |
2519 | } |
2520 | if (c == '&') | |
2521 | { | |
2522 | Lisp_Object length; | |
2523 | length = read1 (readcharfun, pch, first_in_list); | |
2524 | c = READCHAR; | |
2525 | if (c == '"') | |
2526 | { | |
2527 | Lisp_Object tmp, val; | |
82cb60d3 | 2528 | EMACS_INT size_in_chars |
d1ca81d9 AS |
2529 | = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2530 | / BOOL_VECTOR_BITS_PER_CHAR); | |
c2390933 RS |
2531 | |
2532 | UNREAD (c); | |
2533 | tmp = read1 (readcharfun, pch, first_in_list); | |
8792be66 | 2534 | if (STRING_MULTIBYTE (tmp) |
8f924df7 | 2535 | || (size_in_chars != SCHARS (tmp) |
8792be66 KH |
2536 | /* We used to print 1 char too many |
2537 | when the number of bits was a multiple of 8. | |
2538 | Accept such input in case it came from an old | |
2539 | version. */ | |
2540 | && ! (XFASTINT (length) | |
327719ee | 2541 | == (SCHARS (tmp) - 1) * BOOL_VECTOR_BITS_PER_CHAR))) |
e4d29b33 | 2542 | invalid_syntax ("#&..."); |
177c0ea7 | 2543 | |
c2390933 | 2544 | val = Fmake_bool_vector (length, Qnil); |
72af86bd | 2545 | memcpy (XBOOL_VECTOR (val)->data, SDATA (tmp), size_in_chars); |
67d3b149 | 2546 | /* Clear the extraneous bits in the last byte. */ |
d1ca81d9 | 2547 | if (XINT (length) != size_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
67d3b149 | 2548 | XBOOL_VECTOR (val)->data[size_in_chars - 1] |
d1ca81d9 | 2549 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
c2390933 RS |
2550 | return val; |
2551 | } | |
e4d29b33 | 2552 | invalid_syntax ("#&..."); |
c2390933 | 2553 | } |
200f684e | 2554 | if (c == '[') |
876c194c SM |
2555 | { |
2556 | /* Accept compiled functions at read-time so that we don't have to | |
2557 | build them using function calls. */ | |
2558 | Lisp_Object tmp; | |
2559 | tmp = read_vector (readcharfun, 1); | |
77b37c05 | 2560 | return Fmake_byte_code (ASIZE (tmp), |
876c194c SM |
2561 | XVECTOR (tmp)->contents); |
2562 | } | |
748ef62f RS |
2563 | if (c == '(') |
2564 | { | |
2565 | Lisp_Object tmp; | |
2566 | struct gcpro gcpro1; | |
e28552a4 | 2567 | int ch; |
748ef62f RS |
2568 | |
2569 | /* Read the string itself. */ | |
17634846 | 2570 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 2571 | if (ch != 0 || !STRINGP (tmp)) |
e4d29b33 | 2572 | invalid_syntax ("#"); |
748ef62f RS |
2573 | GCPRO1 (tmp); |
2574 | /* Read the intervals and their properties. */ | |
2575 | while (1) | |
2576 | { | |
2577 | Lisp_Object beg, end, plist; | |
2578 | ||
17634846 | 2579 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 2580 | end = plist = Qnil; |
6428369f KH |
2581 | if (ch == ')') |
2582 | break; | |
2583 | if (ch == 0) | |
17634846 | 2584 | end = read1 (readcharfun, &ch, 0); |
6428369f | 2585 | if (ch == 0) |
17634846 | 2586 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 2587 | if (ch) |
e4d29b33 | 2588 | invalid_syntax ("Invalid string property list"); |
748ef62f RS |
2589 | Fset_text_properties (beg, end, plist, tmp); |
2590 | } | |
2591 | UNGCPRO; | |
2592 | return tmp; | |
2593 | } | |
177c0ea7 | 2594 | |
20ea2964 RS |
2595 | /* #@NUMBER is used to skip NUMBER following characters. |
2596 | That's used in .elc files to skip over doc strings | |
2597 | and function definitions. */ | |
2598 | if (c == '@') | |
2599 | { | |
bfbbd7e7 PE |
2600 | enum { extra = 100 }; |
2601 | ptrdiff_t i, nskip = 0; | |
20ea2964 | 2602 | |
8792be66 | 2603 | load_each_byte = 1; |
20ea2964 RS |
2604 | /* Read a decimal integer. */ |
2605 | while ((c = READCHAR) >= 0 | |
2606 | && c >= '0' && c <= '9') | |
2607 | { | |
bfbbd7e7 PE |
2608 | if ((STRING_BYTES_BOUND - extra) / 10 <= nskip) |
2609 | string_overflow (); | |
20ea2964 RS |
2610 | nskip *= 10; |
2611 | nskip += c - '0'; | |
2612 | } | |
0a6a104b | 2613 | UNREAD (c); |
177c0ea7 | 2614 | |
8792be66 KH |
2615 | if (load_force_doc_strings |
2616 | && (EQ (readcharfun, Qget_file_char) | |
2617 | || EQ (readcharfun, Qget_emacs_mule_file_char))) | |
b2a30870 RS |
2618 | { |
2619 | /* If we are supposed to force doc strings into core right now, | |
2620 | record the last string that we skipped, | |
2621 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2622 | |
2623 | /* But first exchange saved_doc_string | |
2624 | with prev_saved_doc_string, so we save two strings. */ | |
2625 | { | |
2626 | char *temp = saved_doc_string; | |
bfbbd7e7 | 2627 | ptrdiff_t temp_size = saved_doc_string_size; |
68c45bf0 | 2628 | file_offset temp_pos = saved_doc_string_position; |
bfbbd7e7 | 2629 | ptrdiff_t temp_len = saved_doc_string_length; |
c15cfd1f RS |
2630 | |
2631 | saved_doc_string = prev_saved_doc_string; | |
2632 | saved_doc_string_size = prev_saved_doc_string_size; | |
2633 | saved_doc_string_position = prev_saved_doc_string_position; | |
2634 | saved_doc_string_length = prev_saved_doc_string_length; | |
2635 | ||
2636 | prev_saved_doc_string = temp; | |
2637 | prev_saved_doc_string_size = temp_size; | |
2638 | prev_saved_doc_string_position = temp_pos; | |
2639 | prev_saved_doc_string_length = temp_len; | |
2640 | } | |
2641 | ||
b2a30870 RS |
2642 | if (saved_doc_string_size == 0) |
2643 | { | |
37d0112b | 2644 | saved_doc_string = (char *) xmalloc (nskip + extra); |
bfbbd7e7 | 2645 | saved_doc_string_size = nskip + extra; |
b2a30870 RS |
2646 | } |
2647 | if (nskip > saved_doc_string_size) | |
2648 | { | |
11938f10 | 2649 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
37d0112b PE |
2650 | nskip + extra); |
2651 | saved_doc_string_size = nskip + extra; | |
b2a30870 RS |
2652 | } |
2653 | ||
68c45bf0 | 2654 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2655 | |
2656 | /* Copy that many characters into saved_doc_string. */ | |
2657 | for (i = 0; i < nskip && c >= 0; i++) | |
2658 | saved_doc_string[i] = c = READCHAR; | |
2659 | ||
2660 | saved_doc_string_length = i; | |
2661 | } | |
2662 | else | |
b2a30870 RS |
2663 | { |
2664 | /* Skip that many characters. */ | |
2665 | for (i = 0; i < nskip && c >= 0; i++) | |
2666 | c = READCHAR; | |
2667 | } | |
d49f0c1a | 2668 | |
8792be66 | 2669 | load_each_byte = 0; |
20ea2964 RS |
2670 | goto retry; |
2671 | } | |
e2518d02 RS |
2672 | if (c == '!') |
2673 | { | |
2674 | /* #! appears at the beginning of an executable file. | |
2675 | Skip the first line. */ | |
225c7a07 | 2676 | while (c != '\n' && c >= 0) |
e2518d02 RS |
2677 | c = READCHAR; |
2678 | goto retry; | |
2679 | } | |
20ea2964 RS |
2680 | if (c == '$') |
2681 | return Vload_file_name; | |
2b6cae0c RS |
2682 | if (c == '\'') |
2683 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2684 | /* #:foo is the uninterned symbol named foo. */ |
2685 | if (c == ':') | |
2686 | { | |
2687 | uninterned_symbol = 1; | |
2688 | c = READCHAR; | |
52968808 | 2689 | if (!(c > 040 |
ed497dd4 | 2690 | && c != 0xa0 /* NBSP */ |
52968808 | 2691 | && (c >= 0200 |
0a6a104b | 2692 | || strchr ("\"';()[]#`,", c) == NULL))) |
52968808 AS |
2693 | { |
2694 | /* No symbol character follows, this is the empty | |
2695 | symbol. */ | |
0a6a104b | 2696 | UNREAD (c); |
52968808 AS |
2697 | return Fmake_symbol (build_string ("")); |
2698 | } | |
2699 | goto read_symbol; | |
4ad679f9 | 2700 | } |
9a79b20c AS |
2701 | /* ## is the empty symbol. */ |
2702 | if (c == '#') | |
2703 | return Fintern (build_string (""), Qnil); | |
4ad679f9 EN |
2704 | /* Reader forms that can reuse previously read objects. */ |
2705 | if (c >= '0' && c <= '9') | |
2706 | { | |
8b9ac8b4 | 2707 | EMACS_INT n = 0; |
4ad679f9 | 2708 | Lisp_Object tem; |
2b6cae0c | 2709 | |
4ad679f9 EN |
2710 | /* Read a non-negative integer. */ |
2711 | while (c >= '0' && c <= '9') | |
2712 | { | |
8b9ac8b4 PE |
2713 | if (MOST_POSITIVE_FIXNUM / 10 < n |
2714 | || MOST_POSITIVE_FIXNUM < n * 10 + c - '0') | |
2715 | n = MOST_POSITIVE_FIXNUM + 1; | |
2716 | else | |
2717 | n = n * 10 + c - '0'; | |
4ad679f9 EN |
2718 | c = READCHAR; |
2719 | } | |
8b9ac8b4 PE |
2720 | |
2721 | if (n <= MOST_POSITIVE_FIXNUM) | |
4ad679f9 | 2722 | { |
8b9ac8b4 PE |
2723 | if (c == 'r' || c == 'R') |
2724 | return read_integer (readcharfun, n); | |
9e062b6c | 2725 | |
8b9ac8b4 PE |
2726 | if (! NILP (Vread_circle)) |
2727 | { | |
2728 | /* #n=object returns object, but associates it with | |
2729 | n for #n#. */ | |
2730 | if (c == '=') | |
2731 | { | |
2732 | /* Make a placeholder for #n# to use temporarily */ | |
2733 | Lisp_Object placeholder; | |
2734 | Lisp_Object cell; | |
9e062b6c | 2735 | |
8b9ac8b4 PE |
2736 | placeholder = Fcons (Qnil, Qnil); |
2737 | cell = Fcons (make_number (n), placeholder); | |
2738 | read_objects = Fcons (cell, read_objects); | |
9e062b6c | 2739 | |
8b9ac8b4 PE |
2740 | /* Read the object itself. */ |
2741 | tem = read0 (readcharfun); | |
9e062b6c | 2742 | |
8b9ac8b4 PE |
2743 | /* Now put it everywhere the placeholder was... */ |
2744 | substitute_object_in_subtree (tem, placeholder); | |
177c0ea7 | 2745 | |
8b9ac8b4 PE |
2746 | /* ...and #n# will use the real value from now on. */ |
2747 | Fsetcdr (cell, tem); | |
177c0ea7 | 2748 | |
8b9ac8b4 PE |
2749 | return tem; |
2750 | } | |
2751 | ||
2752 | /* #n# returns a previously read object. */ | |
2753 | if (c == '#') | |
2754 | { | |
2755 | tem = Fassq (make_number (n), read_objects); | |
2756 | if (CONSP (tem)) | |
2757 | return XCDR (tem); | |
2758 | } | |
2759 | } | |
2760 | } | |
4ad679f9 EN |
2761 | /* Fall through to error message. */ |
2762 | } | |
bf5d1a17 GM |
2763 | else if (c == 'x' || c == 'X') |
2764 | return read_integer (readcharfun, 16); | |
2765 | else if (c == 'o' || c == 'O') | |
2766 | return read_integer (readcharfun, 8); | |
2767 | else if (c == 'b' || c == 'B') | |
2768 | return read_integer (readcharfun, 2); | |
20ea2964 | 2769 | |
200f684e | 2770 | UNREAD (c); |
e4d29b33 | 2771 | invalid_syntax ("#"); |
078e7b4a JB |
2772 | |
2773 | case ';': | |
2774 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2775 | goto retry; | |
2776 | ||
2777 | case '\'': | |
2778 | { | |
2779 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2780 | } | |
2781 | ||
17634846 | 2782 | case '`': |
9a39b306 TO |
2783 | { |
2784 | int next_char = READCHAR; | |
2785 | UNREAD (next_char); | |
2786 | /* Transition from old-style to new-style: | |
2787 | If we see "(`" it used to mean old-style, which usually works | |
2788 | fine because ` should almost never appear in such a position | |
2789 | for new-style. But occasionally we need "(`" to mean new | |
2790 | style, so we try to distinguish the two by the fact that we | |
2791 | can either write "( `foo" or "(` foo", where the first | |
2792 | intends to use new-style whereas the second intends to use | |
2793 | old-style. For Emacs-25, we should completely remove this | |
2794 | first_in_list exception (old-style can still be obtained via | |
2795 | "(\`" anyway). */ | |
bba3e508 | 2796 | if (!new_backquote_flag && first_in_list && next_char == ' ') |
9a39b306 TO |
2797 | { |
2798 | Vold_style_backquotes = Qt; | |
2799 | goto default_label; | |
2800 | } | |
2801 | else | |
2802 | { | |
2803 | Lisp_Object value; | |
17634846 | 2804 | |
9a39b306 TO |
2805 | new_backquote_flag++; |
2806 | value = read0 (readcharfun); | |
2807 | new_backquote_flag--; | |
17634846 | 2808 | |
9a39b306 TO |
2809 | return Fcons (Qbackquote, Fcons (value, Qnil)); |
2810 | } | |
2811 | } | |
17634846 | 2812 | case ',': |
bba3e508 SM |
2813 | { |
2814 | int next_char = READCHAR; | |
2815 | UNREAD (next_char); | |
2816 | /* Transition from old-style to new-style: | |
2817 | It used to be impossible to have a new-style , other than within | |
2818 | a new-style `. This is sufficient when ` and , are used in the | |
2819 | normal way, but ` and , can also appear in args to macros that | |
2820 | will not interpret them in the usual way, in which case , may be | |
2821 | used without any ` anywhere near. | |
2822 | So we now use the same heuristic as for backquote: old-style | |
2823 | unquotes are only recognized when first on a list, and when | |
2824 | followed by a space. | |
2825 | Because it's more difficult to peak 2 chars ahead, a new-style | |
2826 | ,@ can still not be used outside of a `, unless it's in the middle | |
2827 | of a list. */ | |
2828 | if (new_backquote_flag | |
2829 | || !first_in_list | |
2830 | || (next_char != ' ' && next_char != '@')) | |
2831 | { | |
2832 | Lisp_Object comma_type = Qnil; | |
2833 | Lisp_Object value; | |
2834 | int ch = READCHAR; | |
17634846 | 2835 | |
bba3e508 SM |
2836 | if (ch == '@') |
2837 | comma_type = Qcomma_at; | |
2838 | else if (ch == '.') | |
2839 | comma_type = Qcomma_dot; | |
2840 | else | |
2841 | { | |
2842 | if (ch >= 0) UNREAD (ch); | |
2843 | comma_type = Qcomma; | |
2844 | } | |
17634846 | 2845 | |
bba3e508 SM |
2846 | value = read0 (readcharfun); |
2847 | return Fcons (comma_type, Fcons (value, Qnil)); | |
2848 | } | |
2849 | else | |
2850 | { | |
2851 | Vold_style_backquotes = Qt; | |
2852 | goto default_label; | |
2853 | } | |
2854 | } | |
078e7b4a JB |
2855 | case '?': |
2856 | { | |
8792be66 | 2857 | int modifiers; |
df9c2be7 KS |
2858 | int next_char; |
2859 | int ok; | |
f6f79b37 | 2860 | |
078e7b4a | 2861 | c = READCHAR; |
9c97398c GM |
2862 | if (c < 0) |
2863 | end_of_file_error (); | |
078e7b4a | 2864 | |
b9284371 KS |
2865 | /* Accept `single space' syntax like (list ? x) where the |
2866 | whitespace character is SPC or TAB. | |
2867 | Other literal whitespace like NL, CR, and FF are not accepted, | |
2868 | as there are well-established escape sequences for these. */ | |
2869 | if (c == ' ' || c == '\t') | |
2870 | return make_number (c); | |
2871 | ||
078e7b4a | 2872 | if (c == '\\') |
8792be66 KH |
2873 | c = read_escape (readcharfun, 0); |
2874 | modifiers = c & CHAR_MODIFIER_MASK; | |
2875 | c &= ~CHAR_MODIFIER_MASK; | |
2876 | if (CHAR_BYTE8_P (c)) | |
2877 | c = CHAR_TO_BYTE8 (c); | |
2878 | c |= modifiers; | |
078e7b4a | 2879 | |
df9c2be7 | 2880 | next_char = READCHAR; |
bba3e508 SM |
2881 | ok = (next_char <= 040 |
2882 | || (next_char < 0200 | |
0a6a104b | 2883 | && strchr ("\"';()[]#?`,.", next_char) != NULL)); |
df9c2be7 | 2884 | UNREAD (next_char); |
336d4a9c KS |
2885 | if (ok) |
2886 | return make_number (c); | |
37cd4238 | 2887 | |
e4d29b33 | 2888 | invalid_syntax ("?"); |
078e7b4a JB |
2889 | } |
2890 | ||
00a9a935 | 2891 | case '"': |
078e7b4a | 2892 | { |
a742d646 GM |
2893 | char *p = read_buffer; |
2894 | char *end = read_buffer + read_buffer_size; | |
0902fe45 | 2895 | register int ch; |
1571601b KH |
2896 | /* Nonzero if we saw an escape sequence specifying |
2897 | a multibyte character. */ | |
e7fc914b | 2898 | int force_multibyte = 0; |
1571601b | 2899 | /* Nonzero if we saw an escape sequence specifying |
e7fc914b KH |
2900 | a single-byte character. */ |
2901 | int force_singlebyte = 0; | |
078e7b4a | 2902 | int cancel = 0; |
82cb60d3 | 2903 | ptrdiff_t nchars = 0; |
078e7b4a | 2904 | |
0902fe45 PE |
2905 | while ((ch = READCHAR) >= 0 |
2906 | && ch != '\"') | |
078e7b4a | 2907 | { |
449fea39 | 2908 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2909 | { |
82cb60d3 | 2910 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
2911 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
2912 | memory_full (SIZE_MAX); | |
5d65df0d | 2913 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
2914 | read_buffer_size * 2); |
2915 | read_buffer_size *= 2; | |
5d65df0d | 2916 | p = read_buffer + offset; |
078e7b4a JB |
2917 | end = read_buffer + read_buffer_size; |
2918 | } | |
bed23cb2 | 2919 | |
0902fe45 | 2920 | if (ch == '\\') |
03e88613 | 2921 | { |
1571601b | 2922 | int modifiers; |
f6f79b37 | 2923 | |
0902fe45 | 2924 | ch = read_escape (readcharfun, 1); |
bed23cb2 | 2925 | |
0902fe45 PE |
2926 | /* CH is -1 if \ newline has just been seen */ |
2927 | if (ch == -1) | |
03e88613 | 2928 | { |
bed23cb2 RS |
2929 | if (p == read_buffer) |
2930 | cancel = 1; | |
03e88613 RS |
2931 | continue; |
2932 | } | |
bed23cb2 | 2933 | |
0902fe45 PE |
2934 | modifiers = ch & CHAR_MODIFIER_MASK; |
2935 | ch = ch & ~CHAR_MODIFIER_MASK; | |
1571601b | 2936 | |
0902fe45 | 2937 | if (CHAR_BYTE8_P (ch)) |
e7fc914b | 2938 | force_singlebyte = 1; |
0902fe45 | 2939 | else if (! ASCII_CHAR_P (ch)) |
f6f79b37 | 2940 | force_multibyte = 1; |
0902fe45 | 2941 | else /* i.e. ASCII_CHAR_P (ch) */ |
1571601b KH |
2942 | { |
2943 | /* Allow `\C- ' and `\C-?'. */ | |
2944 | if (modifiers == CHAR_CTL) | |
2945 | { | |
0902fe45 PE |
2946 | if (ch == ' ') |
2947 | ch = 0, modifiers = 0; | |
2948 | else if (ch == '?') | |
2949 | ch = 127, modifiers = 0; | |
1571601b KH |
2950 | } |
2951 | if (modifiers & CHAR_SHIFT) | |
2952 | { | |
2953 | /* Shift modifier is valid only with [A-Za-z]. */ | |
0902fe45 | 2954 | if (ch >= 'A' && ch <= 'Z') |
1571601b | 2955 | modifiers &= ~CHAR_SHIFT; |
0902fe45 PE |
2956 | else if (ch >= 'a' && ch <= 'z') |
2957 | ch -= ('a' - 'A'), modifiers &= ~CHAR_SHIFT; | |
1571601b KH |
2958 | } |
2959 | ||
2960 | if (modifiers & CHAR_META) | |
2961 | { | |
2962 | /* Move the meta bit to the right place for a | |
2963 | string. */ | |
2964 | modifiers &= ~CHAR_META; | |
0902fe45 | 2965 | ch = BYTE8_TO_CHAR (ch | 0x80); |
1571601b KH |
2966 | force_singlebyte = 1; |
2967 | } | |
2968 | } | |
5150eeec | 2969 | |
1571601b KH |
2970 | /* Any modifiers remaining are invalid. */ |
2971 | if (modifiers) | |
2972 | error ("Invalid modifier in string"); | |
0902fe45 | 2973 | p += CHAR_STRING (ch, (unsigned char *) p); |
078e7b4a | 2974 | } |
8792be66 | 2975 | else |
5150eeec | 2976 | { |
0902fe45 PE |
2977 | p += CHAR_STRING (ch, (unsigned char *) p); |
2978 | if (CHAR_BYTE8_P (ch)) | |
988f7a0c | 2979 | force_singlebyte = 1; |
0902fe45 | 2980 | else if (! ASCII_CHAR_P (ch)) |
988f7a0c | 2981 | force_multibyte = 1; |
f943104a | 2982 | } |
5150eeec | 2983 | nchars++; |
078e7b4a | 2984 | } |
5150eeec | 2985 | |
0902fe45 | 2986 | if (ch < 0) |
9c97398c | 2987 | end_of_file_error (); |
078e7b4a JB |
2988 | |
2989 | /* If purifying, and string starts with \ newline, | |
2990 | return zero instead. This is for doc strings | |
08564963 | 2991 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 2992 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2993 | return make_number (0); |
2994 | ||
1571601b KH |
2995 | if (force_multibyte) |
2996 | /* READ_BUFFER already contains valid multibyte forms. */ | |
5150eeec | 2997 | ; |
1571601b | 2998 | else if (force_singlebyte) |
a742d646 | 2999 | { |
4a25e32a PE |
3000 | nchars = str_as_unibyte ((unsigned char *) read_buffer, |
3001 | p - read_buffer); | |
1571601b | 3002 | p = read_buffer + nchars; |
a742d646 | 3003 | } |
e28552a4 | 3004 | else |
cef2010d PE |
3005 | { |
3006 | /* Otherwise, READ_BUFFER contains only ASCII. */ | |
3007 | } | |
e7fc914b KH |
3008 | |
3009 | if (read_pure) | |
491f16a2 | 3010 | return make_pure_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3011 | (force_multibyte |
3012 | || (p - read_buffer != nchars))); | |
491f16a2 | 3013 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3014 | (force_multibyte |
3015 | || (p - read_buffer != nchars))); | |
078e7b4a JB |
3016 | } |
3017 | ||
109d300c JB |
3018 | case '.': |
3019 | { | |
109d300c JB |
3020 | int next_char = READCHAR; |
3021 | UNREAD (next_char); | |
3022 | ||
035eec48 | 3023 | if (next_char <= 040 |
e613ea97 | 3024 | || (next_char < 0200 |
0a6a104b | 3025 | && strchr ("\"';([#?`,", next_char) != NULL)) |
109d300c | 3026 | { |
6428369f KH |
3027 | *pch = c; |
3028 | return Qnil; | |
109d300c JB |
3029 | } |
3030 | ||
3031 | /* Otherwise, we fall through! Note that the atom-reading loop | |
3032 | below will now loop at least once, assuring that we will not | |
3033 | try to UNREAD two characters in a row. */ | |
3034 | } | |
078e7b4a | 3035 | default: |
17634846 | 3036 | default_label: |
88852d45 | 3037 | if (c <= 040) goto retry; |
ed497dd4 | 3038 | if (c == 0xa0) /* NBSP */ |
adef3de7 | 3039 | goto retry; |
52968808 AS |
3040 | |
3041 | read_symbol: | |
078e7b4a | 3042 | { |
38404229 | 3043 | char *p = read_buffer; |
481c6336 | 3044 | int quoted = 0; |
46cfea45 | 3045 | EMACS_INT start_position = readchar_count - 1; |
078e7b4a JB |
3046 | |
3047 | { | |
38404229 | 3048 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 3049 | |
ef1b0ba7 | 3050 | do |
078e7b4a | 3051 | { |
449fea39 | 3052 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 3053 | { |
82cb60d3 | 3054 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3055 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3056 | memory_full (SIZE_MAX); | |
5d65df0d | 3057 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3058 | read_buffer_size * 2); |
3059 | read_buffer_size *= 2; | |
5d65df0d | 3060 | p = read_buffer + offset; |
078e7b4a JB |
3061 | end = read_buffer + read_buffer_size; |
3062 | } | |
177c0ea7 | 3063 | |
078e7b4a | 3064 | if (c == '\\') |
481c6336 RS |
3065 | { |
3066 | c = READCHAR; | |
4ab11c09 GM |
3067 | if (c == -1) |
3068 | end_of_file_error (); | |
481c6336 RS |
3069 | quoted = 1; |
3070 | } | |
6f7f43d5 | 3071 | |
1202434b | 3072 | if (multibyte) |
4a25e32a | 3073 | p += CHAR_STRING (c, (unsigned char *) p); |
1202434b KH |
3074 | else |
3075 | *p++ = c; | |
078e7b4a | 3076 | c = READCHAR; |
0a6a104b AS |
3077 | } |
3078 | while (c > 040 | |
ed497dd4 | 3079 | && c != 0xa0 /* NBSP */ |
0a6a104b AS |
3080 | && (c >= 0200 |
3081 | || strchr ("\"';()[]#`,", c) == NULL)); | |
078e7b4a JB |
3082 | |
3083 | if (p == end) | |
3084 | { | |
82cb60d3 | 3085 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3086 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3087 | memory_full (SIZE_MAX); | |
5d65df0d | 3088 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3089 | read_buffer_size * 2); |
3090 | read_buffer_size *= 2; | |
5d65df0d GM |
3091 | p = read_buffer + offset; |
3092 | end = read_buffer + read_buffer_size; | |
078e7b4a JB |
3093 | } |
3094 | *p = 0; | |
0a6a104b | 3095 | UNREAD (c); |
078e7b4a JB |
3096 | } |
3097 | ||
4ad679f9 | 3098 | if (!quoted && !uninterned_symbol) |
481c6336 | 3099 | { |
452f4150 PE |
3100 | Lisp_Object result = string_to_number (read_buffer, 10, 0); |
3101 | if (! NILP (result)) | |
8b9587d7 | 3102 | return result; |
481c6336 | 3103 | } |
abb13b09 | 3104 | { |
e93abe3d KH |
3105 | Lisp_Object name, result; |
3106 | EMACS_INT nbytes = p - read_buffer; | |
3107 | EMACS_INT nchars | |
4a25e32a PE |
3108 | = (multibyte |
3109 | ? multibyte_chars_in_text ((unsigned char *) read_buffer, | |
3110 | nbytes) | |
e93abe3d KH |
3111 | : nbytes); |
3112 | ||
3113 | if (uninterned_symbol && ! NILP (Vpurify_flag)) | |
3114 | name = make_pure_string (read_buffer, nchars, nbytes, multibyte); | |
3115 | else | |
3116 | name = make_specified_string (read_buffer, nchars, nbytes,multibyte); | |
3117 | result = (uninterned_symbol ? Fmake_symbol (name) | |
3118 | : Fintern (name, Qnil)); | |
1202434b | 3119 | |
abb13b09 CW |
3120 | if (EQ (Vread_with_symbol_positions, Qt) |
3121 | || EQ (Vread_with_symbol_positions, readcharfun)) | |
177c0ea7 | 3122 | Vread_symbol_positions_list = |
0a6a104b | 3123 | Fcons (Fcons (result, make_number (start_position)), |
abb13b09 CW |
3124 | Vread_symbol_positions_list); |
3125 | return result; | |
3126 | } | |
078e7b4a JB |
3127 | } |
3128 | } | |
3129 | } | |
3130 | \f | |
9e062b6c RS |
3131 | |
3132 | /* List of nodes we've seen during substitute_object_in_subtree. */ | |
3133 | static Lisp_Object seen_list; | |
3134 | ||
3135 | static void | |
971de7fb | 3136 | substitute_object_in_subtree (Lisp_Object object, Lisp_Object placeholder) |
9e062b6c RS |
3137 | { |
3138 | Lisp_Object check_object; | |
3139 | ||
3140 | /* We haven't seen any objects when we start. */ | |
3141 | seen_list = Qnil; | |
3142 | ||
3143 | /* Make all the substitutions. */ | |
3144 | check_object | |
3145 | = substitute_object_recurse (object, placeholder, object); | |
177c0ea7 | 3146 | |
9e062b6c RS |
3147 | /* Clear seen_list because we're done with it. */ |
3148 | seen_list = Qnil; | |
3149 | ||
3150 | /* The returned object here is expected to always eq the | |
3151 | original. */ | |
3152 | if (!EQ (check_object, object)) | |
3153 | error ("Unexpected mutation error in reader"); | |
3154 | } | |
3155 | ||
3156 | /* Feval doesn't get called from here, so no gc protection is needed. */ | |
7a3d90dc SM |
3157 | #define SUBSTITUTE(get_val, set_val) \ |
3158 | do { \ | |
3159 | Lisp_Object old_value = get_val; \ | |
3160 | Lisp_Object true_value \ | |
3161 | = substitute_object_recurse (object, placeholder, \ | |
3162 | old_value); \ | |
3163 | \ | |
3164 | if (!EQ (old_value, true_value)) \ | |
3165 | { \ | |
3166 | set_val; \ | |
3167 | } \ | |
3168 | } while (0) | |
9e062b6c RS |
3169 | |
3170 | static Lisp_Object | |
971de7fb | 3171 | substitute_object_recurse (Lisp_Object object, Lisp_Object placeholder, Lisp_Object subtree) |
9e062b6c RS |
3172 | { |
3173 | /* If we find the placeholder, return the target object. */ | |
3174 | if (EQ (placeholder, subtree)) | |
3175 | return object; | |
3176 | ||
3177 | /* If we've been to this node before, don't explore it again. */ | |
3178 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) | |
3179 | return subtree; | |
3180 | ||
3181 | /* If this node can be the entry point to a cycle, remember that | |
3182 | we've seen it. It can only be such an entry point if it was made | |
3183 | by #n=, which means that we can find it as a value in | |
3184 | read_objects. */ | |
3185 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
3186 | seen_list = Fcons (subtree, seen_list); | |
177c0ea7 | 3187 | |
9e062b6c RS |
3188 | /* Recurse according to subtree's type. |
3189 | Every branch must return a Lisp_Object. */ | |
3190 | switch (XTYPE (subtree)) | |
3191 | { | |
3192 | case Lisp_Vectorlike: | |
3193 | { | |
82cb60d3 | 3194 | ptrdiff_t i, length = 0; |
7a3d90dc SM |
3195 | if (BOOL_VECTOR_P (subtree)) |
3196 | return subtree; /* No sub-objects anyway. */ | |
3197 | else if (CHAR_TABLE_P (subtree) || SUB_CHAR_TABLE_P (subtree) | |
3198 | || COMPILEDP (subtree)) | |
3199 | length = ASIZE (subtree) & PSEUDOVECTOR_SIZE_MASK; | |
3200 | else if (VECTORP (subtree)) | |
3201 | length = ASIZE (subtree); | |
3202 | else | |
3203 | /* An unknown pseudovector may contain non-Lisp fields, so we | |
3204 | can't just blindly traverse all its fields. We used to call | |
04bf5b65 | 3205 | `Flength' which signaled `sequencep', so I just preserved this |
7a3d90dc SM |
3206 | behavior. */ |
3207 | wrong_type_argument (Qsequencep, subtree); | |
3208 | ||
9e062b6c | 3209 | for (i = 0; i < length; i++) |
7a3d90dc SM |
3210 | SUBSTITUTE (AREF (subtree, i), |
3211 | ASET (subtree, i, true_value)); | |
9e062b6c RS |
3212 | return subtree; |
3213 | } | |
3214 | ||
3215 | case Lisp_Cons: | |
3216 | { | |
7a3d90dc SM |
3217 | SUBSTITUTE (XCAR (subtree), |
3218 | XSETCAR (subtree, true_value)); | |
3219 | SUBSTITUTE (XCDR (subtree), | |
3220 | XSETCDR (subtree, true_value)); | |
9e062b6c RS |
3221 | return subtree; |
3222 | } | |
3223 | ||
9e062b6c RS |
3224 | case Lisp_String: |
3225 | { | |
3226 | /* Check for text properties in each interval. | |
e61b9b87 | 3227 | substitute_in_interval contains part of the logic. */ |
9e062b6c | 3228 | |
d5db4077 | 3229 | INTERVAL root_interval = STRING_INTERVALS (subtree); |
9e062b6c | 3230 | Lisp_Object arg = Fcons (object, placeholder); |
177c0ea7 | 3231 | |
0d74b006 SM |
3232 | traverse_intervals_noorder (root_interval, |
3233 | &substitute_in_interval, arg); | |
9e062b6c RS |
3234 | |
3235 | return subtree; | |
3236 | } | |
9e062b6c RS |
3237 | |
3238 | /* Other types don't recurse any further. */ | |
3239 | default: | |
3240 | return subtree; | |
3241 | } | |
3242 | } | |
3243 | ||
3244 | /* Helper function for substitute_object_recurse. */ | |
3245 | static void | |
971de7fb | 3246 | substitute_in_interval (INTERVAL interval, Lisp_Object arg) |
9e062b6c RS |
3247 | { |
3248 | Lisp_Object object = Fcar (arg); | |
3249 | Lisp_Object placeholder = Fcdr (arg); | |
3250 | ||
9735b9ce | 3251 | SUBSTITUTE (interval->plist, interval->plist = true_value); |
9e062b6c RS |
3252 | } |
3253 | ||
3254 | \f | |
078e7b4a JB |
3255 | #define LEAD_INT 1 |
3256 | #define DOT_CHAR 2 | |
3257 | #define TRAIL_INT 4 | |
452f4150 | 3258 | #define E_EXP 16 |
078e7b4a | 3259 | |
8b9587d7 | 3260 | |
452f4150 PE |
3261 | /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has |
3262 | integer syntax and fits in a fixnum, else return the nearest float if CP has | |
3263 | either floating point or integer syntax and BASE is 10, else return nil. If | |
3264 | IGNORE_TRAILING is nonzero, consider just the longest prefix of CP that has | |
3265 | valid floating point syntax. Signal an overflow if BASE is not 10 and the | |
3266 | number has integer syntax but does not fit. */ | |
8b9587d7 PE |
3267 | |
3268 | Lisp_Object | |
452f4150 | 3269 | string_to_number (char const *string, int base, int ignore_trailing) |
078e7b4a | 3270 | { |
a8fe7202 | 3271 | int state; |
452f4150 PE |
3272 | char const *cp = string; |
3273 | int leading_digit; | |
3274 | int float_syntax = 0; | |
3275 | double value = 0; | |
d8578e58 | 3276 | |
8b9587d7 PE |
3277 | /* Compute NaN and infinities using a variable, to cope with compilers that |
3278 | think they are smarter than we are. */ | |
3279 | double zero = 0; | |
3280 | ||
3281 | /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on | |
3282 | IEEE floating point hosts, and works around a formerly-common bug where | |
3283 | atof ("-0.0") drops the sign. */ | |
3284 | int negative = *cp == '-'; | |
3285 | ||
452f4150 PE |
3286 | int signedp = negative || *cp == '+'; |
3287 | cp += signedp; | |
8b9587d7 | 3288 | |
078e7b4a | 3289 | state = 0; |
078e7b4a | 3290 | |
452f4150 PE |
3291 | leading_digit = digit_to_number (*cp, base); |
3292 | if (0 <= leading_digit) | |
078e7b4a JB |
3293 | { |
3294 | state |= LEAD_INT; | |
452f4150 PE |
3295 | do |
3296 | ++cp; | |
3297 | while (0 <= digit_to_number (*cp, base)); | |
078e7b4a JB |
3298 | } |
3299 | if (*cp == '.') | |
3300 | { | |
3301 | state |= DOT_CHAR; | |
3302 | cp++; | |
3303 | } | |
078e7b4a | 3304 | |
452f4150 | 3305 | if (base == 10) |
eb659c41 | 3306 | { |
452f4150 PE |
3307 | if ('0' <= *cp && *cp <= '9') |
3308 | { | |
3309 | state |= TRAIL_INT; | |
3310 | do | |
3311 | cp++; | |
3312 | while ('0' <= *cp && *cp <= '9'); | |
3313 | } | |
3314 | if (*cp == 'e' || *cp == 'E') | |
3315 | { | |
3316 | char const *ecp = cp; | |
3317 | cp++; | |
3318 | if (*cp == '+' || *cp == '-') | |
3319 | cp++; | |
3320 | if ('0' <= *cp && *cp <= '9') | |
3321 | { | |
3322 | state |= E_EXP; | |
3323 | do | |
3324 | cp++; | |
3325 | while ('0' <= *cp && *cp <= '9'); | |
3326 | } | |
3327 | else if (cp[-1] == '+' | |
3328 | && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') | |
3329 | { | |
3330 | state |= E_EXP; | |
3331 | cp += 3; | |
3332 | value = 1.0 / zero; | |
3333 | } | |
3334 | else if (cp[-1] == '+' | |
3335 | && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
3336 | { | |
3337 | state |= E_EXP; | |
3338 | cp += 3; | |
3339 | value = zero / zero; | |
3340 | ||
3341 | /* If that made a "negative" NaN, negate it. */ | |
3342 | { | |
3343 | int i; | |
3344 | union { double d; char c[sizeof (double)]; } | |
3345 | u_data, u_minus_zero; | |
3346 | u_data.d = value; | |
3347 | u_minus_zero.d = -0.0; | |
3348 | for (i = 0; i < sizeof (double); i++) | |
3349 | if (u_data.c[i] & u_minus_zero.c[i]) | |
3350 | { | |
3351 | value = -value; | |
3352 | break; | |
3353 | } | |
3354 | } | |
3355 | /* Now VALUE is a positive NaN. */ | |
3356 | } | |
3357 | else | |
3358 | cp = ecp; | |
3359 | } | |
3360 | ||
3361 | float_syntax = ((state & (DOT_CHAR|TRAIL_INT)) == (DOT_CHAR|TRAIL_INT) | |
3362 | || state == (LEAD_INT|E_EXP)); | |
eb659c41 | 3363 | } |
8b9587d7 | 3364 | |
452f4150 PE |
3365 | /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept |
3366 | any prefix that matches. Otherwise, the entire string must match. */ | |
3367 | if (! (ignore_trailing | |
3368 | ? ((state & LEAD_INT) != 0 || float_syntax) | |
3369 | : (!*cp && ((state & ~DOT_CHAR) == LEAD_INT || float_syntax)))) | |
3370 | return Qnil; | |
8b9587d7 | 3371 | |
d78050d6 PE |
3372 | /* If the number uses integer and not float syntax, and is in C-language |
3373 | range, use its value, preferably as a fixnum. */ | |
452f4150 PE |
3374 | if (0 <= leading_digit && ! float_syntax) |
3375 | { | |
d78050d6 PE |
3376 | uintmax_t n; |
3377 | ||
3378 | /* Fast special case for single-digit integers. This also avoids a | |
3379 | glitch when BASE is 16 and IGNORE_TRAILING is nonzero, because in that | |
3380 | case some versions of strtoumax accept numbers like "0x1" that Emacs | |
3381 | does not allow. */ | |
3382 | if (digit_to_number (string[signedp + 1], base) < 0) | |
3383 | return make_number (negative ? -leading_digit : leading_digit); | |
3384 | ||
3385 | errno = 0; | |
3386 | n = strtoumax (string + signedp, NULL, base); | |
3387 | if (errno == ERANGE) | |
452f4150 | 3388 | { |
d78050d6 PE |
3389 | /* Unfortunately there's no simple and accurate way to convert |
3390 | non-base-10 numbers that are out of C-language range. */ | |
3391 | if (base != 10) | |
f14ed477 | 3392 | xsignal1 (Qoverflow_error, build_string (string)); |
452f4150 | 3393 | } |
d78050d6 PE |
3394 | else if (n <= (negative ? -MOST_NEGATIVE_FIXNUM : MOST_POSITIVE_FIXNUM)) |
3395 | { | |
3396 | EMACS_INT signed_n = n; | |
3397 | return make_number (negative ? -signed_n : signed_n); | |
3398 | } | |
3399 | else | |
3400 | value = n; | |
452f4150 | 3401 | } |
8b9587d7 | 3402 | |
452f4150 PE |
3403 | /* Either the number uses float syntax, or it does not fit into a fixnum. |
3404 | Convert it from string to floating point, unless the value is already | |
d78050d6 PE |
3405 | known because it is an infinity, a NAN, or its absolute value fits in |
3406 | uintmax_t. */ | |
8b9587d7 | 3407 | if (! value) |
452f4150 PE |
3408 | value = atof (string + signedp); |
3409 | ||
d78050d6 | 3410 | return make_float (negative ? -value : value); |
078e7b4a | 3411 | } |
cc94f3b2 | 3412 | |
078e7b4a JB |
3413 | \f |
3414 | static Lisp_Object | |
876c194c | 3415 | read_vector (Lisp_Object readcharfun, int bytecodeflag) |
078e7b4a | 3416 | { |
82cb60d3 | 3417 | ptrdiff_t i, size; |
078e7b4a | 3418 | register Lisp_Object *ptr; |
c15cfd1f | 3419 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
3420 | register struct Lisp_Cons *otem; |
3421 | Lisp_Object len; | |
3422 | ||
3423 | tem = read_list (1, readcharfun); | |
3424 | len = Flength (tem); | |
3425 | vector = (read_pure ? make_pure_vector (XINT (len)) : Fmake_vector (len, Qnil)); | |
3426 | ||
77b37c05 | 3427 | size = ASIZE (vector); |
078e7b4a JB |
3428 | ptr = XVECTOR (vector)->contents; |
3429 | for (i = 0; i < size; i++) | |
3430 | { | |
c15cfd1f RS |
3431 | item = Fcar (tem); |
3432 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
3433 | bytecode object, the docstring containing the bytecode and | |
3434 | constants values must be treated as unibyte and passed to | |
3435 | Fread, to get the actual bytecode string and constants vector. */ | |
876c194c | 3436 | if (bytecodeflag && load_force_doc_strings) |
c15cfd1f RS |
3437 | { |
3438 | if (i == COMPILED_BYTECODE) | |
3439 | { | |
3440 | if (!STRINGP (item)) | |
6fa2b890 | 3441 | error ("Invalid byte code"); |
c15cfd1f RS |
3442 | |
3443 | /* Delay handling the bytecode slot until we know whether | |
3444 | it is lazily-loaded (we can tell by whether the | |
3445 | constants slot is nil). */ | |
3446 | ptr[COMPILED_CONSTANTS] = item; | |
3447 | item = Qnil; | |
3448 | } | |
3449 | else if (i == COMPILED_CONSTANTS) | |
3450 | { | |
3451 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
3452 | ||
3453 | if (NILP (item)) | |
3454 | { | |
3455 | /* Coerce string to unibyte (like string-as-unibyte, | |
3456 | but without generating extra garbage and | |
3457 | guaranteeing no change in the contents). */ | |
bee91904 | 3458 | STRING_SET_CHARS (bytestr, SBYTES (bytestr)); |
d5db4077 | 3459 | STRING_SET_UNIBYTE (bytestr); |
c15cfd1f | 3460 | |
8792be66 | 3461 | item = Fread (Fcons (bytestr, readcharfun)); |
c15cfd1f | 3462 | if (!CONSP (item)) |
6fa2b890 | 3463 | error ("Invalid byte code"); |
c15cfd1f RS |
3464 | |
3465 | otem = XCONS (item); | |
c1d497be KR |
3466 | bytestr = XCAR (item); |
3467 | item = XCDR (item); | |
c15cfd1f RS |
3468 | free_cons (otem); |
3469 | } | |
3470 | ||
3471 | /* Now handle the bytecode slot. */ | |
3472 | ptr[COMPILED_BYTECODE] = read_pure ? Fpurecopy (bytestr) : bytestr; | |
3473 | } | |
8792be66 KH |
3474 | else if (i == COMPILED_DOC_STRING |
3475 | && STRINGP (item) | |
3476 | && ! STRING_MULTIBYTE (item)) | |
3477 | { | |
3478 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) | |
3479 | item = Fdecode_coding_string (item, Qemacs_mule, Qnil, Qnil); | |
3480 | else | |
3481 | item = Fstring_as_multibyte (item); | |
3482 | } | |
c15cfd1f RS |
3483 | } |
3484 | ptr[i] = read_pure ? Fpurecopy (item) : item; | |
078e7b4a JB |
3485 | otem = XCONS (tem); |
3486 | tem = Fcdr (tem); | |
3487 | free_cons (otem); | |
3488 | } | |
3489 | return vector; | |
3490 | } | |
177c0ea7 | 3491 | |
6f7f43d5 RS |
3492 | /* FLAG = 1 means check for ] to terminate rather than ) and . |
3493 | FLAG = -1 means check for starting with defun | |
078e7b4a JB |
3494 | and make structure pure. */ |
3495 | ||
3496 | static Lisp_Object | |
971de7fb | 3497 | read_list (int flag, register Lisp_Object readcharfun) |
078e7b4a JB |
3498 | { |
3499 | /* -1 means check next element for defun, | |
3500 | 0 means don't check, | |
3501 | 1 means already checked and found defun. */ | |
3502 | int defunflag = flag < 0 ? -1 : 0; | |
3503 | Lisp_Object val, tail; | |
3504 | register Lisp_Object elt, tem; | |
3505 | struct gcpro gcpro1, gcpro2; | |
821d417e | 3506 | /* 0 is the normal case. |
b2a30870 | 3507 | 1 means this list is a doc reference; replace it with the number 0. |
177c0ea7 | 3508 | 2 means this list is a doc reference; replace it with the doc string. */ |
821d417e | 3509 | int doc_reference = 0; |
078e7b4a | 3510 | |
17634846 RS |
3511 | /* Initialize this to 1 if we are reading a list. */ |
3512 | int first_in_list = flag <= 0; | |
3513 | ||
078e7b4a JB |
3514 | val = Qnil; |
3515 | tail = Qnil; | |
3516 | ||
3517 | while (1) | |
3518 | { | |
e28552a4 | 3519 | int ch; |
078e7b4a | 3520 | GCPRO2 (val, tail); |
17634846 | 3521 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 3522 | UNGCPRO; |
20ea2964 | 3523 | |
17634846 RS |
3524 | first_in_list = 0; |
3525 | ||
821d417e | 3526 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 3527 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 3528 | && ! NILP (elt) |
821d417e RS |
3529 | && !NILP (Vpurify_flag)) |
3530 | { | |
3531 | if (NILP (Vdoc_file_name)) | |
3532 | /* We have not yet called Snarf-documentation, so assume | |
3533 | this file is described in the DOC-MM.NN file | |
3534 | and Snarf-documentation will fill in the right value later. | |
3535 | For now, replace the whole list with 0. */ | |
3536 | doc_reference = 1; | |
3537 | else | |
3538 | /* We have already called Snarf-documentation, so make a relative | |
3539 | file name for this file, so it can be found properly | |
3540 | in the installed Lisp directory. | |
3541 | We don't use Fexpand_file_name because that would make | |
3542 | the directory absolute now. */ | |
3543 | elt = concat2 (build_string ("../lisp/"), | |
3544 | Ffile_name_nondirectory (elt)); | |
3545 | } | |
b2a30870 | 3546 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 3547 | && ! NILP (elt) |
b2a30870 RS |
3548 | && load_force_doc_strings) |
3549 | doc_reference = 2; | |
20ea2964 | 3550 | |
6428369f | 3551 | if (ch) |
078e7b4a JB |
3552 | { |
3553 | if (flag > 0) | |
3554 | { | |
6428369f | 3555 | if (ch == ']') |
078e7b4a | 3556 | return val; |
e4d29b33 | 3557 | invalid_syntax (") or . in a vector"); |
078e7b4a | 3558 | } |
6428369f | 3559 | if (ch == ')') |
078e7b4a | 3560 | return val; |
6428369f | 3561 | if (ch == '.') |
078e7b4a JB |
3562 | { |
3563 | GCPRO2 (val, tail); | |
265a9e55 | 3564 | if (!NILP (tail)) |
f5df591a | 3565 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
3566 | else |
3567 | val = read0 (readcharfun); | |
17634846 | 3568 | read1 (readcharfun, &ch, 0); |
078e7b4a | 3569 | UNGCPRO; |
6428369f | 3570 | if (ch == ')') |
821d417e RS |
3571 | { |
3572 | if (doc_reference == 1) | |
3573 | return make_number (0); | |
b2a30870 RS |
3574 | if (doc_reference == 2) |
3575 | { | |
3576 | /* Get a doc string from the file we are loading. | |
8792be66 KH |
3577 | If it's in saved_doc_string, get it from there. |
3578 | ||
3579 | Here, we don't know if the string is a | |
3580 | bytecode string or a doc string. As a | |
3581 | bytecode string must be unibyte, we always | |
3582 | return a unibyte string. If it is actually a | |
3583 | doc string, caller must make it | |
3584 | multibyte. */ | |
8f924df7 | 3585 | |
bfbbd7e7 | 3586 | EMACS_INT pos = XINT (XCDR (val)); |
c15cfd1f RS |
3587 | /* Position is negative for user variables. */ |
3588 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
3589 | if (pos >= saved_doc_string_position |
3590 | && pos < (saved_doc_string_position | |
3591 | + saved_doc_string_length)) | |
3592 | { | |
82cb60d3 PE |
3593 | ptrdiff_t start = pos - saved_doc_string_position; |
3594 | ptrdiff_t from, to; | |
b2a30870 RS |
3595 | |
3596 | /* Process quoting with ^A, | |
3597 | and find the end of the string, | |
3598 | which is marked with ^_ (037). */ | |
3599 | for (from = start, to = start; | |
3600 | saved_doc_string[from] != 037;) | |
3601 | { | |
3602 | int c = saved_doc_string[from++]; | |
3603 | if (c == 1) | |
3604 | { | |
3605 | c = saved_doc_string[from++]; | |
3606 | if (c == 1) | |
3607 | saved_doc_string[to++] = c; | |
3608 | else if (c == '0') | |
3609 | saved_doc_string[to++] = 0; | |
3610 | else if (c == '_') | |
3611 | saved_doc_string[to++] = 037; | |
3612 | } | |
3613 | else | |
3614 | saved_doc_string[to++] = c; | |
3615 | } | |
3616 | ||
8792be66 KH |
3617 | return make_unibyte_string (saved_doc_string + start, |
3618 | to - start); | |
b2a30870 | 3619 | } |
c15cfd1f RS |
3620 | /* Look in prev_saved_doc_string the same way. */ |
3621 | else if (pos >= prev_saved_doc_string_position | |
3622 | && pos < (prev_saved_doc_string_position | |
3623 | + prev_saved_doc_string_length)) | |
3624 | { | |
82cb60d3 PE |
3625 | ptrdiff_t start = |
3626 | pos - prev_saved_doc_string_position; | |
3627 | ptrdiff_t from, to; | |
c15cfd1f RS |
3628 | |
3629 | /* Process quoting with ^A, | |
3630 | and find the end of the string, | |
3631 | which is marked with ^_ (037). */ | |
3632 | for (from = start, to = start; | |
3633 | prev_saved_doc_string[from] != 037;) | |
3634 | { | |
3635 | int c = prev_saved_doc_string[from++]; | |
3636 | if (c == 1) | |
3637 | { | |
3638 | c = prev_saved_doc_string[from++]; | |
3639 | if (c == 1) | |
3640 | prev_saved_doc_string[to++] = c; | |
3641 | else if (c == '0') | |
3642 | prev_saved_doc_string[to++] = 0; | |
3643 | else if (c == '_') | |
3644 | prev_saved_doc_string[to++] = 037; | |
3645 | } | |
3646 | else | |
3647 | prev_saved_doc_string[to++] = c; | |
3648 | } | |
3649 | ||
8792be66 KH |
3650 | return make_unibyte_string (prev_saved_doc_string |
3651 | + start, | |
3652 | to - start); | |
c15cfd1f | 3653 | } |
b2a30870 | 3654 | else |
8792be66 | 3655 | return get_doc_string (val, 1, 0); |
b2a30870 RS |
3656 | } |
3657 | ||
821d417e RS |
3658 | return val; |
3659 | } | |
e4d29b33 | 3660 | invalid_syntax (". in wrong context"); |
078e7b4a | 3661 | } |
e4d29b33 | 3662 | invalid_syntax ("] in a list"); |
078e7b4a JB |
3663 | } |
3664 | tem = (read_pure && flag <= 0 | |
3665 | ? pure_cons (elt, Qnil) | |
3666 | : Fcons (elt, Qnil)); | |
265a9e55 | 3667 | if (!NILP (tail)) |
f5df591a | 3668 | XSETCDR (tail, tem); |
078e7b4a JB |
3669 | else |
3670 | val = tem; | |
3671 | tail = tem; | |
3672 | if (defunflag < 0) | |
3673 | defunflag = EQ (elt, Qdefun); | |
3674 | else if (defunflag > 0) | |
3675 | read_pure = 1; | |
3676 | } | |
3677 | } | |
3678 | \f | |
1e3890d1 | 3679 | static Lisp_Object initial_obarray; |
078e7b4a | 3680 | |
d007f5c8 RS |
3681 | /* oblookup stores the bucket number here, for the sake of Funintern. */ |
3682 | ||
2f30ecd0 | 3683 | static size_t oblookup_last_bucket_number; |
d007f5c8 | 3684 | |
d007f5c8 RS |
3685 | /* Get an error if OBARRAY is not an obarray. |
3686 | If it is one, return it. */ | |
3687 | ||
078e7b4a | 3688 | Lisp_Object |
971de7fb | 3689 | check_obarray (Lisp_Object obarray) |
078e7b4a | 3690 | { |
77b37c05 | 3691 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a JB |
3692 | { |
3693 | /* If Vobarray is now invalid, force it to be valid. */ | |
3694 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
8878319c | 3695 | wrong_type_argument (Qvectorp, obarray); |
078e7b4a JB |
3696 | } |
3697 | return obarray; | |
3698 | } | |
3699 | ||
d007f5c8 RS |
3700 | /* Intern the C string STR: return a symbol with that name, |
3701 | interned in the current obarray. */ | |
078e7b4a JB |
3702 | |
3703 | Lisp_Object | |
971de7fb | 3704 | intern (const char *str) |
078e7b4a JB |
3705 | { |
3706 | Lisp_Object tem; | |
6e5bb2dc | 3707 | ptrdiff_t len = strlen (str); |
153a17b7 | 3708 | Lisp_Object obarray; |
078e7b4a | 3709 | |
153a17b7 | 3710 | obarray = Vobarray; |
77b37c05 | 3711 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a | 3712 | obarray = check_obarray (obarray); |
e28552a4 | 3713 | tem = oblookup (obarray, str, len, len); |
cfff016d | 3714 | if (SYMBOLP (tem)) |
078e7b4a | 3715 | return tem; |
87631ef7 | 3716 | return Fintern (make_string (str, len), obarray); |
078e7b4a | 3717 | } |
4ad679f9 | 3718 | |
5e2327cf DN |
3719 | Lisp_Object |
3720 | intern_c_string (const char *str) | |
3721 | { | |
3722 | Lisp_Object tem; | |
6e5bb2dc | 3723 | ptrdiff_t len = strlen (str); |
5e2327cf DN |
3724 | Lisp_Object obarray; |
3725 | ||
3726 | obarray = Vobarray; | |
77b37c05 | 3727 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
5e2327cf DN |
3728 | obarray = check_obarray (obarray); |
3729 | tem = oblookup (obarray, str, len, len); | |
3730 | if (SYMBOLP (tem)) | |
3731 | return tem; | |
3732 | ||
3733 | if (NILP (Vpurify_flag)) | |
3734 | /* Creating a non-pure string from a string literal not | |
3735 | implemented yet. We could just use make_string here and live | |
3736 | with the extra copy. */ | |
3737 | abort (); | |
3738 | ||
3739 | return Fintern (make_pure_c_string (str), obarray); | |
3740 | } | |
d007f5c8 | 3741 | \f |
a7ca3326 | 3742 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
3743 | doc: /* Return the canonical symbol whose name is STRING. |
3744 | If there is none, one is created by this function and returned. | |
3745 | A second optional argument specifies the obarray to use; | |
3746 | it defaults to the value of `obarray'. */) | |
5842a27b | 3747 | (Lisp_Object string, Lisp_Object obarray) |
078e7b4a JB |
3748 | { |
3749 | register Lisp_Object tem, sym, *ptr; | |
3750 | ||
265a9e55 | 3751 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3752 | obarray = check_obarray (obarray); |
3753 | ||
b7826503 | 3754 | CHECK_STRING (string); |
078e7b4a | 3755 | |
42a5b22f | 3756 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3757 | SCHARS (string), |
3758 | SBYTES (string)); | |
cfff016d | 3759 | if (!INTEGERP (tem)) |
078e7b4a JB |
3760 | return tem; |
3761 | ||
265a9e55 | 3762 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
3763 | string = Fpurecopy (string); |
3764 | sym = Fmake_symbol (string); | |
44c6c019 GM |
3765 | |
3766 | if (EQ (obarray, initial_obarray)) | |
3767 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
3768 | else | |
3769 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 3770 | |
d5db4077 | 3771 | if ((SREF (string, 0) == ':') |
a458d45d | 3772 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
3773 | { |
3774 | XSYMBOL (sym)->constant = 1; | |
ce5b453a SM |
3775 | XSYMBOL (sym)->redirect = SYMBOL_PLAINVAL; |
3776 | SET_SYMBOL_VAL (XSYMBOL (sym), sym); | |
44c6c019 | 3777 | } |
a0549832 | 3778 | |
078e7b4a | 3779 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
cfff016d | 3780 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
3781 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
3782 | else | |
3783 | XSYMBOL (sym)->next = 0; | |
3784 | *ptr = sym; | |
3785 | return sym; | |
3786 | } | |
3787 | ||
a7ca3326 | 3788 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, |
5de38842 PJ |
3789 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3790 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3791 | symbol is searched for. | |
3792 | A second optional argument specifies the obarray to use; | |
3793 | it defaults to the value of `obarray'. */) | |
5842a27b | 3794 | (Lisp_Object name, Lisp_Object obarray) |
078e7b4a | 3795 | { |
c2d47f4b | 3796 | register Lisp_Object tem, string; |
078e7b4a | 3797 | |
265a9e55 | 3798 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3799 | obarray = check_obarray (obarray); |
3800 | ||
b55048d4 GM |
3801 | if (!SYMBOLP (name)) |
3802 | { | |
b7826503 | 3803 | CHECK_STRING (name); |
c2d47f4b | 3804 | string = name; |
b55048d4 GM |
3805 | } |
3806 | else | |
c2d47f4b | 3807 | string = SYMBOL_NAME (name); |
078e7b4a | 3808 | |
42a5b22f | 3809 | tem = oblookup (obarray, SSDATA (string), SCHARS (string), SBYTES (string)); |
b55048d4 GM |
3810 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
3811 | return Qnil; | |
3812 | else | |
078e7b4a | 3813 | return tem; |
078e7b4a | 3814 | } |
d007f5c8 | 3815 | \f |
a7ca3326 | 3816 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, |
5de38842 PJ |
3817 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3818 | The value is t if a symbol was found and deleted, nil otherwise. | |
3819 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3820 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3821 | OBARRAY defaults to the value of the variable `obarray'. */) | |
5842a27b | 3822 | (Lisp_Object name, Lisp_Object obarray) |
d007f5c8 RS |
3823 | { |
3824 | register Lisp_Object string, tem; | |
2f30ecd0 | 3825 | size_t hash; |
d007f5c8 RS |
3826 | |
3827 | if (NILP (obarray)) obarray = Vobarray; | |
3828 | obarray = check_obarray (obarray); | |
3829 | ||
3830 | if (SYMBOLP (name)) | |
d4c83cae | 3831 | string = SYMBOL_NAME (name); |
d007f5c8 RS |
3832 | else |
3833 | { | |
b7826503 | 3834 | CHECK_STRING (name); |
d007f5c8 RS |
3835 | string = name; |
3836 | } | |
3837 | ||
42a5b22f | 3838 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3839 | SCHARS (string), |
3840 | SBYTES (string)); | |
d007f5c8 RS |
3841 | if (INTEGERP (tem)) |
3842 | return Qnil; | |
3843 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3844 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3845 | return Qnil; | |
3846 | ||
8ab1650e SM |
3847 | /* There are plenty of other symbols which will screw up the Emacs |
3848 | session if we unintern them, as well as even more ways to use | |
3849 | `setq' or `fset' or whatnot to make the Emacs session | |
3850 | unusable. Let's not go down this silly road. --Stef */ | |
3851 | /* if (EQ (tem, Qnil) || EQ (tem, Qt)) | |
3852 | error ("Attempt to unintern t or nil"); */ | |
82c602f0 | 3853 | |
44c6c019 | 3854 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
ca69c42f | 3855 | |
d007f5c8 RS |
3856 | hash = oblookup_last_bucket_number; |
3857 | ||
3858 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
3859 | { |
3860 | if (XSYMBOL (tem)->next) | |
3861 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
3862 | else | |
3863 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
3864 | } | |
d007f5c8 RS |
3865 | else |
3866 | { | |
3867 | Lisp_Object tail, following; | |
3868 | ||
3869 | for (tail = XVECTOR (obarray)->contents[hash]; | |
3870 | XSYMBOL (tail)->next; | |
3871 | tail = following) | |
3872 | { | |
3873 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3874 | if (EQ (following, tem)) | |
3875 | { | |
3876 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
3877 | break; | |
3878 | } | |
3879 | } | |
3880 | } | |
3881 | ||
3882 | return Qt; | |
3883 | } | |
3884 | \f | |
3885 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3886 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3887 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3888 | |
3889 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3890 | |
3891 | Lisp_Object | |
40283062 | 3892 | oblookup (Lisp_Object obarray, register const char *ptr, EMACS_INT size, EMACS_INT size_byte) |
078e7b4a | 3893 | { |
2f30ecd0 PE |
3894 | size_t hash; |
3895 | size_t obsize; | |
078e7b4a JB |
3896 | register Lisp_Object tail; |
3897 | Lisp_Object bucket, tem; | |
3898 | ||
cfff016d | 3899 | if (!VECTORP (obarray) |
77b37c05 | 3900 | || (obsize = ASIZE (obarray)) == 0) |
078e7b4a JB |
3901 | { |
3902 | obarray = check_obarray (obarray); | |
77b37c05 | 3903 | obsize = ASIZE (obarray); |
078e7b4a | 3904 | } |
519418b3 RS |
3905 | /* This is sometimes needed in the middle of GC. */ |
3906 | obsize &= ~ARRAY_MARK_FLAG; | |
7c2fb837 | 3907 | hash = hash_string (ptr, size_byte) % obsize; |
078e7b4a | 3908 | bucket = XVECTOR (obarray)->contents[hash]; |
d007f5c8 | 3909 | oblookup_last_bucket_number = hash; |
8bc285a2 | 3910 | if (EQ (bucket, make_number (0))) |
078e7b4a | 3911 | ; |
cfff016d | 3912 | else if (!SYMBOLP (bucket)) |
078e7b4a | 3913 | error ("Bad data in guts of obarray"); /* Like CADR error message */ |
d007f5c8 RS |
3914 | else |
3915 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3916 | { |
d5db4077 KR |
3917 | if (SBYTES (SYMBOL_NAME (tail)) == size_byte |
3918 | && SCHARS (SYMBOL_NAME (tail)) == size | |
72af86bd | 3919 | && !memcmp (SDATA (SYMBOL_NAME (tail)), ptr, size_byte)) |
078e7b4a JB |
3920 | return tail; |
3921 | else if (XSYMBOL (tail)->next == 0) | |
3922 | break; | |
3923 | } | |
1805de4f | 3924 | XSETINT (tem, hash); |
078e7b4a JB |
3925 | return tem; |
3926 | } | |
d007f5c8 | 3927 | \f |
078e7b4a | 3928 | void |
971de7fb | 3929 | map_obarray (Lisp_Object obarray, void (*fn) (Lisp_Object, Lisp_Object), Lisp_Object arg) |
078e7b4a | 3930 | { |
82cb60d3 | 3931 | ptrdiff_t i; |
078e7b4a | 3932 | register Lisp_Object tail; |
b7826503 | 3933 | CHECK_VECTOR (obarray); |
77b37c05 | 3934 | for (i = ASIZE (obarray) - 1; i >= 0; i--) |
078e7b4a JB |
3935 | { |
3936 | tail = XVECTOR (obarray)->contents[i]; | |
4f5c4403 | 3937 | if (SYMBOLP (tail)) |
078e7b4a JB |
3938 | while (1) |
3939 | { | |
3940 | (*fn) (tail, arg); | |
3941 | if (XSYMBOL (tail)->next == 0) | |
3942 | break; | |
1805de4f | 3943 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3944 | } |
3945 | } | |
3946 | } | |
3947 | ||
7d383292 | 3948 | static void |
971de7fb | 3949 | mapatoms_1 (Lisp_Object sym, Lisp_Object function) |
078e7b4a JB |
3950 | { |
3951 | call1 (function, sym); | |
3952 | } | |
3953 | ||
3954 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3955 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3956 | OBARRAY defaults to the value of `obarray'. */) | |
5842a27b | 3957 | (Lisp_Object function, Lisp_Object obarray) |
078e7b4a | 3958 | { |
265a9e55 | 3959 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3960 | obarray = check_obarray (obarray); |
3961 | ||
3962 | map_obarray (obarray, mapatoms_1, function); | |
3963 | return Qnil; | |
3964 | } | |
3965 | ||
5e88a39e | 3966 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3967 | |
3968 | void | |
971de7fb | 3969 | init_obarray (void) |
078e7b4a JB |
3970 | { |
3971 | Lisp_Object oblength; | |
37d0112b | 3972 | ptrdiff_t size = 100 + MAX_MULTIBYTE_LENGTH; |
078e7b4a | 3973 | |
baf69866 | 3974 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3975 | |
078e7b4a JB |
3976 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3977 | initial_obarray = Vobarray; | |
3978 | staticpro (&initial_obarray); | |
078e7b4a | 3979 | |
d67b4f80 | 3980 | Qunbound = Fmake_symbol (make_pure_c_string ("unbound")); |
ce5b453a SM |
3981 | /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the |
3982 | NILP (Vpurify_flag) check in intern_c_string. */ | |
3983 | Qnil = make_number (-1); Vpurify_flag = make_number (1); | |
3984 | Qnil = intern_c_string ("nil"); | |
3985 | ||
3986 | /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil, | |
53964682 | 3987 | so those two need to be fixed manually. */ |
ce5b453a | 3988 | SET_SYMBOL_VAL (XSYMBOL (Qunbound), Qunbound); |
078e7b4a | 3989 | XSYMBOL (Qunbound)->function = Qunbound; |
ce5b453a SM |
3990 | XSYMBOL (Qunbound)->plist = Qnil; |
3991 | /* XSYMBOL (Qnil)->function = Qunbound; */ | |
3992 | SET_SYMBOL_VAL (XSYMBOL (Qnil), Qnil); | |
3993 | XSYMBOL (Qnil)->constant = 1; | |
3994 | XSYMBOL (Qnil)->plist = Qnil; | |
078e7b4a | 3995 | |
d67b4f80 | 3996 | Qt = intern_c_string ("t"); |
ce5b453a | 3997 | SET_SYMBOL_VAL (XSYMBOL (Qt), Qt); |
44c6c019 | 3998 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
3999 | |
4000 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
4001 | Vpurify_flag = Qt; | |
4002 | ||
cd3520a4 | 4003 | DEFSYM (Qvariable_documentation, "variable-documentation"); |
078e7b4a | 4004 | |
37d0112b PE |
4005 | read_buffer = (char *) xmalloc (size); |
4006 | read_buffer_size = size; | |
078e7b4a JB |
4007 | } |
4008 | \f | |
4009 | void | |
971de7fb | 4010 | defsubr (struct Lisp_Subr *sname) |
078e7b4a JB |
4011 | { |
4012 | Lisp_Object sym; | |
d67b4f80 | 4013 | sym = intern_c_string (sname->symbol_name); |
eab3844f | 4014 | XSETTYPED_PVECTYPE (sname, size, PVEC_SUBR); |
1805de4f | 4015 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
4016 | } |
4017 | ||
4018 | #ifdef NOTDEF /* use fset in subr.el now */ | |
4019 | void | |
1dae0f0a | 4020 | defalias (struct Lisp_Subr *sname, char *string) |
078e7b4a JB |
4021 | { |
4022 | Lisp_Object sym; | |
4023 | sym = intern (string); | |
1805de4f | 4024 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
4025 | } |
4026 | #endif /* NOTDEF */ | |
4027 | ||
039c6cc3 | 4028 | /* Define an "integer variable"; a symbol whose value is forwarded to a |
82cb60d3 | 4029 | C variable of type EMACS_INT. Sample call (with "xx" to fool make-docfile): |
039c6cc3 | 4030 | DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */ |
078e7b4a | 4031 | void |
ce5b453a SM |
4032 | defvar_int (struct Lisp_Intfwd *i_fwd, |
4033 | const char *namestring, EMACS_INT *address) | |
078e7b4a | 4034 | { |
ce5b453a | 4035 | Lisp_Object sym; |
5e2327cf | 4036 | sym = intern_c_string (namestring); |
ce5b453a SM |
4037 | i_fwd->type = Lisp_Fwd_Int; |
4038 | i_fwd->intvar = address; | |
b9598260 | 4039 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4040 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4041 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)i_fwd); | |
078e7b4a JB |
4042 | } |
4043 | ||
f0529b5b | 4044 | /* Similar but define a variable whose value is t if address contains 1, |
0f011df0 | 4045 | nil if address contains 0. */ |
078e7b4a | 4046 | void |
ce5b453a SM |
4047 | defvar_bool (struct Lisp_Boolfwd *b_fwd, |
4048 | const char *namestring, int *address) | |
078e7b4a | 4049 | { |
ce5b453a | 4050 | Lisp_Object sym; |
5e2327cf | 4051 | sym = intern_c_string (namestring); |
ce5b453a SM |
4052 | b_fwd->type = Lisp_Fwd_Bool; |
4053 | b_fwd->boolvar = address; | |
b9598260 | 4054 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4055 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4056 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)b_fwd); | |
1ffcc3b1 | 4057 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
4058 | } |
4059 | ||
1a0f90f7 KH |
4060 | /* Similar but define a variable whose value is the Lisp Object stored |
4061 | at address. Two versions: with and without gc-marking of the C | |
4062 | variable. The nopro version is used when that variable will be | |
4063 | gc-marked for some other reason, since marking the same slot twice | |
4064 | can cause trouble with strings. */ | |
078e7b4a | 4065 | void |
ce5b453a SM |
4066 | defvar_lisp_nopro (struct Lisp_Objfwd *o_fwd, |
4067 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4068 | { |
ce5b453a | 4069 | Lisp_Object sym; |
5e2327cf | 4070 | sym = intern_c_string (namestring); |
ce5b453a SM |
4071 | o_fwd->type = Lisp_Fwd_Obj; |
4072 | o_fwd->objvar = address; | |
b9598260 | 4073 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4074 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4075 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)o_fwd); | |
078e7b4a JB |
4076 | } |
4077 | ||
078e7b4a | 4078 | void |
ce5b453a SM |
4079 | defvar_lisp (struct Lisp_Objfwd *o_fwd, |
4080 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4081 | { |
ce5b453a | 4082 | defvar_lisp_nopro (o_fwd, namestring, address); |
1a0f90f7 | 4083 | staticpro (address); |
078e7b4a JB |
4084 | } |
4085 | ||
950c215d | 4086 | /* Similar but define a variable whose value is the Lisp Object stored |
4ac38690 | 4087 | at a particular offset in the current kboard object. */ |
950c215d KH |
4088 | |
4089 | void | |
ce5b453a SM |
4090 | defvar_kboard (struct Lisp_Kboard_Objfwd *ko_fwd, |
4091 | const char *namestring, int offset) | |
950c215d | 4092 | { |
ce5b453a | 4093 | Lisp_Object sym; |
5e2327cf | 4094 | sym = intern_c_string (namestring); |
ce5b453a SM |
4095 | ko_fwd->type = Lisp_Fwd_Kboard_Obj; |
4096 | ko_fwd->offset = offset; | |
b9598260 | 4097 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4098 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4099 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)ko_fwd); | |
950c215d | 4100 | } |
078e7b4a | 4101 | \f |
11938f10 KH |
4102 | /* Record the value of load-path used at the start of dumping |
4103 | so we can see if the site changed it later during dumping. */ | |
4104 | static Lisp_Object dump_path; | |
4105 | ||
d5b28a9d | 4106 | void |
971de7fb | 4107 | init_lread (void) |
078e7b4a | 4108 | { |
8ea90aa3 | 4109 | const char *normal; |
e73997a1 | 4110 | int turn_off_warning = 0; |
078e7b4a | 4111 | |
279499f0 | 4112 | /* Compute the default load-path. */ |
46947372 JB |
4113 | #ifdef CANNOT_DUMP |
4114 | normal = PATH_LOADSEARCH; | |
e065a56e | 4115 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
4116 | #else |
4117 | if (NILP (Vpurify_flag)) | |
4118 | normal = PATH_LOADSEARCH; | |
279499f0 | 4119 | else |
46947372 | 4120 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 4121 | |
46947372 JB |
4122 | /* In a dumped Emacs, we normally have to reset the value of |
4123 | Vload_path from PATH_LOADSEARCH, since the value that was dumped | |
4124 | uses ../lisp, instead of the path of the installed elisp | |
4125 | libraries. However, if it appears that Vload_path was changed | |
4126 | from the default before dumping, don't override that value. */ | |
4746118a JB |
4127 | if (initialized) |
4128 | { | |
4746118a | 4129 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
4130 | { |
4131 | Vload_path = decode_env_path (0, normal); | |
74180aa4 | 4132 | if (!NILP (Vinstallation_directory)) |
80667d53 | 4133 | { |
3ddff138 RS |
4134 | Lisp_Object tem, tem1, sitelisp; |
4135 | ||
4136 | /* Remove site-lisp dirs from path temporarily and store | |
4137 | them in sitelisp, then conc them on at the end so | |
4138 | they're always first in path. */ | |
4139 | sitelisp = Qnil; | |
4140 | while (1) | |
4141 | { | |
4142 | tem = Fcar (Vload_path); | |
4143 | tem1 = Fstring_match (build_string ("site-lisp"), | |
4144 | tem, Qnil); | |
4145 | if (!NILP (tem1)) | |
4146 | { | |
4147 | Vload_path = Fcdr (Vload_path); | |
4148 | sitelisp = Fcons (tem, sitelisp); | |
4149 | } | |
4150 | else | |
4151 | break; | |
4152 | } | |
4153 | ||
74180aa4 | 4154 | /* Add to the path the lisp subdir of the |
3a3056e5 | 4155 | installation dir, if it exists. */ |
74180aa4 RS |
4156 | tem = Fexpand_file_name (build_string ("lisp"), |
4157 | Vinstallation_directory); | |
3a3056e5 RS |
4158 | tem1 = Ffile_exists_p (tem); |
4159 | if (!NILP (tem1)) | |
4160 | { | |
4161 | if (NILP (Fmember (tem, Vload_path))) | |
e73997a1 RS |
4162 | { |
4163 | turn_off_warning = 1; | |
3ddff138 | 4164 | Vload_path = Fcons (tem, Vload_path); |
e73997a1 | 4165 | } |
3a3056e5 RS |
4166 | } |
4167 | else | |
4168 | /* That dir doesn't exist, so add the build-time | |
4169 | Lisp dirs instead. */ | |
4170 | Vload_path = nconc2 (Vload_path, dump_path); | |
c478f98c | 4171 | |
9fbc0116 RS |
4172 | /* Add leim under the installation dir, if it exists. */ |
4173 | tem = Fexpand_file_name (build_string ("leim"), | |
4174 | Vinstallation_directory); | |
4175 | tem1 = Ffile_exists_p (tem); | |
4176 | if (!NILP (tem1)) | |
4177 | { | |
4178 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4179 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 RS |
4180 | } |
4181 | ||
88852d45 | 4182 | /* Add site-lisp under the installation dir, if it exists. */ |
c478f98c RS |
4183 | tem = Fexpand_file_name (build_string ("site-lisp"), |
4184 | Vinstallation_directory); | |
4185 | tem1 = Ffile_exists_p (tem); | |
4186 | if (!NILP (tem1)) | |
4187 | { | |
4188 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4189 | Vload_path = Fcons (tem, Vload_path); |
c478f98c | 4190 | } |
0f337465 RS |
4191 | |
4192 | /* If Emacs was not built in the source directory, | |
9fbc0116 RS |
4193 | and it is run from where it was built, add to load-path |
4194 | the lisp, leim and site-lisp dirs under that directory. */ | |
0f337465 RS |
4195 | |
4196 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) | |
4197 | { | |
33046fc9 RS |
4198 | Lisp_Object tem2; |
4199 | ||
0f337465 RS |
4200 | tem = Fexpand_file_name (build_string ("src/Makefile"), |
4201 | Vinstallation_directory); | |
4202 | tem1 = Ffile_exists_p (tem); | |
33046fc9 RS |
4203 | |
4204 | /* Don't be fooled if they moved the entire source tree | |
4205 | AFTER dumping Emacs. If the build directory is indeed | |
4206 | different from the source dir, src/Makefile.in and | |
4207 | src/Makefile will not be found together. */ | |
4208 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
4209 | Vinstallation_directory); | |
4210 | tem2 = Ffile_exists_p (tem); | |
4211 | if (!NILP (tem1) && NILP (tem2)) | |
0f337465 RS |
4212 | { |
4213 | tem = Fexpand_file_name (build_string ("lisp"), | |
4214 | Vsource_directory); | |
4215 | ||
4216 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4217 | Vload_path = Fcons (tem, Vload_path); |
0f337465 | 4218 | |
9fbc0116 RS |
4219 | tem = Fexpand_file_name (build_string ("leim"), |
4220 | Vsource_directory); | |
4221 | ||
4222 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4223 | Vload_path = Fcons (tem, Vload_path); |
9fbc0116 | 4224 | |
0f337465 RS |
4225 | tem = Fexpand_file_name (build_string ("site-lisp"), |
4226 | Vsource_directory); | |
4227 | ||
4228 | if (NILP (Fmember (tem, Vload_path))) | |
3ddff138 | 4229 | Vload_path = Fcons (tem, Vload_path); |
0f337465 RS |
4230 | } |
4231 | } | |
66b7b0fe | 4232 | if (!NILP (sitelisp) && !no_site_lisp) |
3ddff138 | 4233 | Vload_path = nconc2 (Fnreverse (sitelisp), Vload_path); |
80667d53 RS |
4234 | } |
4235 | } | |
4746118a JB |
4236 | } |
4237 | else | |
11938f10 | 4238 | { |
7b396c6c RS |
4239 | /* NORMAL refers to the lisp dir in the source directory. */ |
4240 | /* We used to add ../lisp at the front here, but | |
4241 | that caused trouble because it was copied from dump_path | |
88852d45 | 4242 | into Vload_path, above, when Vinstallation_directory was non-nil. |
7b396c6c RS |
4243 | It should be unnecessary. */ |
4244 | Vload_path = decode_env_path (0, normal); | |
11938f10 KH |
4245 | dump_path = Vload_path; |
4246 | } | |
46947372 | 4247 | #endif |
279499f0 | 4248 | |
9735b9ce | 4249 | #if (!(defined (WINDOWSNT) || (defined (HAVE_NS)))) |
177c0ea7 JB |
4250 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is |
4251 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 4252 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
9e2a2647 | 4253 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
317073d5 | 4254 | |
078e7b4a | 4255 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
4256 | if (!turn_off_warning) |
4257 | { | |
4258 | Lisp_Object path_tail; | |
078e7b4a | 4259 | |
e73997a1 RS |
4260 | for (path_tail = Vload_path; |
4261 | !NILP (path_tail); | |
c1d497be | 4262 | path_tail = XCDR (path_tail)) |
e73997a1 RS |
4263 | { |
4264 | Lisp_Object dirfile; | |
4265 | dirfile = Fcar (path_tail); | |
4266 | if (STRINGP (dirfile)) | |
4267 | { | |
4268 | dirfile = Fdirectory_file_name (dirfile); | |
42a5b22f | 4269 | if (access (SSDATA (dirfile), 0) < 0) |
85496b8c | 4270 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", |
c1d497be | 4271 | XCAR (path_tail)); |
e73997a1 RS |
4272 | } |
4273 | } | |
4274 | } | |
9e2a2647 | 4275 | #endif /* !(WINDOWSNT || HAVE_NS) */ |
46947372 JB |
4276 | |
4277 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
4278 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 4279 | #ifndef CANNOT_DUMP |
46947372 JB |
4280 | if (NILP (Vpurify_flag) |
4281 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 4282 | #endif |
279499f0 | 4283 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
4284 | |
4285 | Vvalues = Qnil; | |
4286 | ||
078e7b4a | 4287 | load_in_progress = 0; |
4e53f562 | 4288 | Vload_file_name = Qnil; |
d2c6be7f RS |
4289 | |
4290 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
4291 | |
4292 | Vstandard_input = Qt; | |
f74b0705 | 4293 | Vloads_in_progress = Qnil; |
078e7b4a JB |
4294 | } |
4295 | ||
85496b8c | 4296 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
88852d45 | 4297 | does not exist. Print it on stderr and put it in *Messages*. */ |
85496b8c | 4298 | |
d5b28a9d | 4299 | void |
a8fe7202 | 4300 | dir_warning (const char *format, Lisp_Object dirname) |
85496b8c | 4301 | { |
d5db4077 | 4302 | fprintf (stderr, format, SDATA (dirname)); |
0df02bf3 | 4303 | |
9b69357e GV |
4304 | /* Don't log the warning before we've initialized!! */ |
4305 | if (initialized) | |
0df02bf3 PE |
4306 | { |
4307 | char *buffer; | |
4308 | ptrdiff_t message_len; | |
4309 | USE_SAFE_ALLOCA; | |
4310 | SAFE_ALLOCA (buffer, char *, | |
4311 | SBYTES (dirname) + strlen (format) - (sizeof "%s" - 1) + 1); | |
4312 | message_len = esprintf (buffer, format, SDATA (dirname)); | |
4313 | message_dolog (buffer, message_len, 0, STRING_MULTIBYTE (dirname)); | |
4314 | SAFE_FREE (); | |
4315 | } | |
85496b8c RS |
4316 | } |
4317 | ||
078e7b4a | 4318 | void |
971de7fb | 4319 | syms_of_lread (void) |
078e7b4a JB |
4320 | { |
4321 | defsubr (&Sread); | |
4322 | defsubr (&Sread_from_string); | |
4323 | defsubr (&Sintern); | |
4324 | defsubr (&Sintern_soft); | |
d007f5c8 | 4325 | defsubr (&Sunintern); |
971a4293 | 4326 | defsubr (&Sget_load_suffixes); |
078e7b4a | 4327 | defsubr (&Sload); |
228d4b1c | 4328 | defsubr (&Seval_buffer); |
078e7b4a JB |
4329 | defsubr (&Seval_region); |
4330 | defsubr (&Sread_char); | |
4331 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 4332 | defsubr (&Sread_event); |
078e7b4a JB |
4333 | defsubr (&Sget_file_char); |
4334 | defsubr (&Smapatoms); | |
86d00812 | 4335 | defsubr (&Slocate_file_internal); |
078e7b4a | 4336 | |
29208e82 | 4337 | DEFVAR_LISP ("obarray", Vobarray, |
5de38842 PJ |
4338 | doc: /* Symbol table for use by `intern' and `read'. |
4339 | It is a vector whose length ought to be prime for best results. | |
4340 | The vector's contents don't make sense if examined from Lisp programs; | |
4341 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a | 4342 | |
29208e82 | 4343 | DEFVAR_LISP ("values", Vvalues, |
5de38842 PJ |
4344 | doc: /* List of values of all expressions which were read, evaluated and printed. |
4345 | Order is reverse chronological. */); | |
078e7b4a | 4346 | |
29208e82 | 4347 | DEFVAR_LISP ("standard-input", Vstandard_input, |
5de38842 PJ |
4348 | doc: /* Stream for read to get input from. |
4349 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
4350 | Vstandard_input = Qt; |
4351 | ||
29208e82 | 4352 | DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions, |
abb13b09 CW |
4353 | doc: /* If non-nil, add position of read symbols to `read-symbol-positions-list'. |
4354 | ||
4355 | If this variable is a buffer, then only forms read from that buffer | |
4356 | will be added to `read-symbol-positions-list'. | |
4357 | If this variable is t, then all read forms will be added. | |
4358 | The effect of all other values other than nil are not currently | |
4359 | defined, although they may be in the future. | |
4360 | ||
4361 | The positions are relative to the last call to `read' or | |
4362 | `read-from-string'. It is probably a bad idea to set this variable at | |
4363 | the toplevel; bind it instead. */); | |
4364 | Vread_with_symbol_positions = Qnil; | |
4365 | ||
29208e82 | 4366 | DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list, |
d6567030 | 4367 | doc: /* A list mapping read symbols to their positions. |
abb13b09 CW |
4368 | This variable is modified during calls to `read' or |
4369 | `read-from-string', but only when `read-with-symbol-positions' is | |
4370 | non-nil. | |
4371 | ||
4372 | Each element of the list looks like (SYMBOL . CHAR-POSITION), where | |
d6567030 | 4373 | CHAR-POSITION is an integer giving the offset of that occurrence of the |
abb13b09 CW |
4374 | symbol from the position where `read' or `read-from-string' started. |
4375 | ||
4376 | Note that a symbol will appear multiple times in this list, if it was | |
4377 | read multiple times. The list is in the same order as the symbols | |
4378 | were read in. */); | |
177c0ea7 | 4379 | Vread_symbol_positions_list = Qnil; |
abb13b09 | 4380 | |
29208e82 | 4381 | DEFVAR_LISP ("read-circle", Vread_circle, |
91f68422 CY |
4382 | doc: /* Non-nil means read recursive structures using #N= and #N# syntax. */); |
4383 | Vread_circle = Qt; | |
4384 | ||
29208e82 | 4385 | DEFVAR_LISP ("load-path", Vload_path, |
5de38842 PJ |
4386 | doc: /* *List of directories to search for files to load. |
4387 | Each element is a string (directory name) or nil (try default directory). | |
4388 | Initialized based on EMACSLOADPATH environment variable, if any, | |
4389 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 4390 | |
29208e82 | 4391 | DEFVAR_LISP ("load-suffixes", Vload_suffixes, |
971a4293 LT |
4392 | doc: /* List of suffixes for (compiled or source) Emacs Lisp files. |
4393 | This list should not include the empty string. | |
4394 | `load' and related functions try to append these suffixes, in order, | |
4395 | to the specified file name if a Lisp suffix is allowed or required. */); | |
a4ada374 DN |
4396 | Vload_suffixes = Fcons (make_pure_c_string (".elc"), |
4397 | Fcons (make_pure_c_string (".el"), Qnil)); | |
29208e82 | 4398 | DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes, |
971a4293 LT |
4399 | doc: /* List of suffixes that indicate representations of \ |
4400 | the same file. | |
4401 | This list should normally start with the empty string. | |
4402 | ||
4403 | Enabling Auto Compression mode appends the suffixes in | |
4404 | `jka-compr-load-suffixes' to this list and disabling Auto Compression | |
4405 | mode removes them again. `load' and related functions use this list to | |
4406 | determine whether they should look for compressed versions of a file | |
4407 | and, if so, which suffixes they should try to append to the file name | |
4408 | in order to do so. However, if you want to customize which suffixes | |
4409 | the loading functions recognize as compression suffixes, you should | |
4410 | customize `jka-compr-load-suffixes' rather than the present variable. */); | |
a74d1c97 | 4411 | Vload_file_rep_suffixes = Fcons (empty_unibyte_string, Qnil); |
e61b9b87 | 4412 | |
29208e82 | 4413 | DEFVAR_BOOL ("load-in-progress", load_in_progress, |
e0f24100 | 4414 | doc: /* Non-nil if inside of `load'. */); |
cd3520a4 | 4415 | DEFSYM (Qload_in_progress, "load-in-progress"); |
078e7b4a | 4416 | |
29208e82 | 4417 | DEFVAR_LISP ("after-load-alist", Vafter_load_alist, |
5de38842 | 4418 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
6bb6da3e AM |
4419 | Each element looks like (REGEXP-OR-FEATURE FORMS...). |
4420 | ||
4421 | REGEXP-OR-FEATURE is either a regular expression to match file names, or | |
4422 | a symbol \(a feature name). | |
4423 | ||
4424 | When `load' is run and the file-name argument matches an element's | |
4425 | REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol | |
4426 | REGEXP-OR-FEATURE, the FORMS in the element are executed. | |
4427 | ||
4428 | An error in FORMS does not undo the load, but does prevent execution of | |
4429 | the rest of the FORMS. */); | |
078e7b4a JB |
4430 | Vafter_load_alist = Qnil; |
4431 | ||
29208e82 | 4432 | DEFVAR_LISP ("load-history", Vload_history, |
4801c5fa CY |
4433 | doc: /* Alist mapping loaded file names to symbols and features. |
4434 | Each alist element should be a list (FILE-NAME ENTRIES...), where | |
4435 | FILE-NAME is the name of a file that has been loaded into Emacs. | |
4436 | The file name is absolute and true (i.e. it doesn't contain symlinks). | |
4437 | As an exception, one of the alist elements may have FILE-NAME nil, | |
4438 | for symbols and features not associated with any file. | |
4439 | ||
4440 | The remaining ENTRIES in the alist element describe the functions and | |
4441 | variables defined in that file, the features provided, and the | |
4442 | features required. Each entry has the form `(provide . FEATURE)', | |
4443 | `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)', | |
69bb1ef7 LMI |
4444 | `(defface . SYMBOL)', or `(t . SYMBOL)'. Entries like `(t . SYMBOL)' |
4445 | may precede a `(defun . FUNCTION)' entry, and means that SYMBOL was an | |
4446 | autoload before this file redefined it as a function. In addition, | |
4447 | entries may also be single symbols, which means that SYMBOL was | |
4448 | defined by `defvar' or `defconst'. | |
0fc213e9 | 4449 | |
b502a9a1 RS |
4450 | During preloading, the file name recorded is relative to the main Lisp |
4451 | directory. These file names are converted to absolute at startup. */); | |
ae321d28 RS |
4452 | Vload_history = Qnil; |
4453 | ||
29208e82 | 4454 | DEFVAR_LISP ("load-file-name", Vload_file_name, |
5de38842 | 4455 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
4456 | Vload_file_name = Qnil; |
4457 | ||
29208e82 | 4458 | DEFVAR_LISP ("user-init-file", Vuser_init_file, |
5de38842 | 4459 | doc: /* File name, including directory, of user's initialization file. |
0a25a201 RS |
4460 | If the file loaded had extension `.elc', and the corresponding source file |
4461 | exists, this variable contains the name of source file, suitable for use | |
099de390 JB |
4462 | by functions like `custom-save-all' which edit the init file. |
4463 | While Emacs loads and evaluates the init file, value is the real name | |
4464 | of the file, regardless of whether or not it has the `.elc' extension. */); | |
4116ab9f KH |
4465 | Vuser_init_file = Qnil; |
4466 | ||
29208e82 | 4467 | DEFVAR_LISP ("current-load-list", Vcurrent_load_list, |
5de38842 | 4468 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
4469 | Vcurrent_load_list = Qnil; |
4470 | ||
29208e82 | 4471 | DEFVAR_LISP ("load-read-function", Vload_read_function, |
5de38842 PJ |
4472 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
4473 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
4474 | Vload_read_function = Qnil; |
4475 | ||
29208e82 | 4476 | DEFVAR_LISP ("load-source-file-function", Vload_source_file_function, |
9b33a603 | 4477 | doc: /* Function called in `load' for loading an Emacs Lisp source file. |
5de38842 PJ |
4478 | This function is for doing code conversion before reading the source file. |
4479 | If nil, loading is done without any code conversion. | |
4480 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
4481 | FULLNAME is the full name of FILE. | |
4482 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
4483 | Vload_source_file_function = Qnil; |
4484 | ||
29208e82 | 4485 | DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings, |
5de38842 PJ |
4486 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
4487 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
4488 | load_force_doc_strings = 0; |
4489 | ||
29208e82 | 4490 | DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte, |
5de38842 PJ |
4491 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
4492 | This is normally bound by `load' and `eval-buffer' to control `read', | |
4493 | and is not meant for users to change. */); | |
94e554db RS |
4494 | load_convert_to_unibyte = 0; |
4495 | ||
29208e82 | 4496 | DEFVAR_LISP ("source-directory", Vsource_directory, |
5de38842 PJ |
4497 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
4498 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
4499 | Vsource_directory |
4500 | = Fexpand_file_name (build_string ("../"), | |
4501 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
4502 | ||
29208e82 | 4503 | DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list, |
5de38842 | 4504 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
4505 | Vpreloaded_file_list = Qnil; |
4506 | ||
29208e82 | 4507 | DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars, |
5de38842 | 4508 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
4509 | Vbyte_boolean_vars = Qnil; |
4510 | ||
29208e82 | 4511 | DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries, |
5de38842 PJ |
4512 | doc: /* Non-nil means load dangerous compiled Lisp files. |
4513 | Some versions of XEmacs use different byte codes than Emacs. These | |
4514 | incompatible byte codes can make Emacs crash when it tries to execute | |
4515 | them. */); | |
da84f340 GM |
4516 | load_dangerous_libraries = 0; |
4517 | ||
29208e82 | 4518 | DEFVAR_BOOL ("force-load-messages", force_load_messages, |
beb0b7f9 EZ |
4519 | doc: /* Non-nil means force printing messages when loading Lisp files. |
4520 | This overrides the value of the NOMESSAGE argument to `load'. */); | |
4521 | force_load_messages = 0; | |
4522 | ||
29208e82 | 4523 | DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp, |
5de38842 PJ |
4524 | doc: /* Regular expression matching safe to load compiled Lisp files. |
4525 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
4526 | from the file, and matches them against this regular expression. | |
4527 | When the regular expression matches, the file is considered to be safe | |
4528 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 4529 | Vbytecomp_version_regexp |
d67b4f80 | 4530 | = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 4531 | |
b9598260 SM |
4532 | Qlexical_binding = intern ("lexical-binding"); |
4533 | staticpro (&Qlexical_binding); | |
8f1d2ef6 | 4534 | DEFVAR_LISP ("lexical-binding", Vlexical_binding, |
f41628b2 LMI |
4535 | doc: /* Whether to use lexical binding when evaluating code. |
4536 | Non-nil means that the code in the current buffer should be evaluated | |
4537 | with lexical binding. | |
1d698799 LMI |
4538 | This variable is automatically set from the file variables of an |
4539 | interpreted Lisp file read using `load'. */); | |
b9598260 SM |
4540 | Fmake_variable_buffer_local (Qlexical_binding); |
4541 | ||
29208e82 | 4542 | DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list, |
3f39f996 RS |
4543 | doc: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */); |
4544 | Veval_buffer_list = Qnil; | |
4545 | ||
29208e82 | 4546 | DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes, |
5aa273b0 SM |
4547 | doc: /* Set to non-nil when `read' encounters an old-style backquote. */); |
4548 | Vold_style_backquotes = Qnil; | |
cd3520a4 | 4549 | DEFSYM (Qold_style_backquotes, "old-style-backquotes"); |
5aa273b0 | 4550 | |
a90ba1e2 KH |
4551 | /* Vsource_directory was initialized in init_lread. */ |
4552 | ||
d2c6be7f RS |
4553 | load_descriptor_list = Qnil; |
4554 | staticpro (&load_descriptor_list); | |
4555 | ||
cd3520a4 JB |
4556 | DEFSYM (Qcurrent_load_list, "current-load-list"); |
4557 | DEFSYM (Qstandard_input, "standard-input"); | |
4558 | DEFSYM (Qread_char, "read-char"); | |
4559 | DEFSYM (Qget_file_char, "get-file-char"); | |
4560 | DEFSYM (Qget_emacs_mule_file_char, "get-emacs-mule-file-char"); | |
4561 | DEFSYM (Qload_force_doc_strings, "load-force-doc-strings"); | |
4562 | ||
4563 | DEFSYM (Qbackquote, "`"); | |
4564 | DEFSYM (Qcomma, ","); | |
4565 | DEFSYM (Qcomma_at, ",@"); | |
4566 | DEFSYM (Qcomma_dot, ",."); | |
4567 | ||
4568 | DEFSYM (Qinhibit_file_name_operation, "inhibit-file-name-operation"); | |
4569 | DEFSYM (Qascii_character, "ascii-character"); | |
4570 | DEFSYM (Qfunction, "function"); | |
4571 | DEFSYM (Qload, "load"); | |
4572 | DEFSYM (Qload_file_name, "load-file-name"); | |
4573 | DEFSYM (Qeval_buffer_list, "eval-buffer-list"); | |
4574 | DEFSYM (Qfile_truename, "file-truename"); | |
4575 | DEFSYM (Qdir_ok, "dir-ok"); | |
4576 | DEFSYM (Qdo_after_load_evaluation, "do-after-load-evaluation"); | |
6bb6da3e | 4577 | |
11938f10 | 4578 | staticpro (&dump_path); |
4ad679f9 EN |
4579 | |
4580 | staticpro (&read_objects); | |
4581 | read_objects = Qnil; | |
9e062b6c | 4582 | staticpro (&seen_list); |
f153db13 | 4583 | seen_list = Qnil; |
177c0ea7 | 4584 | |
7ee3bd7b GM |
4585 | Vloads_in_progress = Qnil; |
4586 | staticpro (&Vloads_in_progress); | |
f19a0f5b | 4587 | |
cd3520a4 JB |
4588 | DEFSYM (Qhash_table, "hash-table"); |
4589 | DEFSYM (Qdata, "data"); | |
4590 | DEFSYM (Qtest, "test"); | |
4591 | DEFSYM (Qsize, "size"); | |
4592 | DEFSYM (Qweakness, "weakness"); | |
4593 | DEFSYM (Qrehash_size, "rehash-size"); | |
4594 | DEFSYM (Qrehash_threshold, "rehash-threshold"); | |
078e7b4a | 4595 | } |