Commit | Line | Data |
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078e7b4a | 1 | /* Lisp parsing and input streams. |
039c6cc3 | 2 | |
acaf905b | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2012 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> |
9660f5fc | 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 | ||
48def666 | 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 | ||
b2a30870 | 108 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
d311d28c PE |
109 | static ptrdiff_t read_from_string_index; |
110 | static ptrdiff_t read_from_string_index_byte; | |
111 | static ptrdiff_t read_from_string_limit; | |
17634846 | 112 | |
abb13b09 | 113 | /* Number of characters read in the current call to Fread or |
48def666 | 114 | Fread_from_string. */ |
da43f021 | 115 | static EMACS_INT readchar_count; |
6f7f43d5 | 116 | |
c15cfd1f | 117 | /* This contains the last string skipped with #@. */ |
b2a30870 RS |
118 | static char *saved_doc_string; |
119 | /* Length of buffer allocated in saved_doc_string. */ | |
bfbbd7e7 | 120 | static ptrdiff_t saved_doc_string_size; |
b2a30870 | 121 | /* Length of actual data in saved_doc_string. */ |
bfbbd7e7 | 122 | static ptrdiff_t saved_doc_string_length; |
b2a30870 | 123 | /* This is the file position that string came from. */ |
68c45bf0 | 124 | static file_offset saved_doc_string_position; |
b2a30870 | 125 | |
c15cfd1f RS |
126 | /* This contains the previous string skipped with #@. |
127 | We copy it from saved_doc_string when a new string | |
128 | is put in saved_doc_string. */ | |
129 | static char *prev_saved_doc_string; | |
130 | /* Length of buffer allocated in prev_saved_doc_string. */ | |
bfbbd7e7 | 131 | static ptrdiff_t prev_saved_doc_string_size; |
c15cfd1f | 132 | /* Length of actual data in prev_saved_doc_string. */ |
bfbbd7e7 | 133 | static ptrdiff_t prev_saved_doc_string_length; |
c15cfd1f | 134 | /* This is the file position that string came from. */ |
68c45bf0 | 135 | static file_offset prev_saved_doc_string_position; |
c15cfd1f | 136 | |
17634846 RS |
137 | /* Nonzero means inside a new-style backquote |
138 | with no surrounding parentheses. | |
139 | Fread initializes this to zero, so we need not specbind it | |
140 | or worry about what happens to it when there is an error. */ | |
141 | static int new_backquote_flag; | |
29208e82 | 142 | static Lisp_Object Qold_style_backquotes; |
7ee3bd7b GM |
143 | |
144 | /* A list of file names for files being loaded in Fload. Used to | |
145 | check for recursive loads. */ | |
146 | ||
9942fa0c | 147 | static Lisp_Object Vloads_in_progress; |
7ee3bd7b | 148 | |
f57e2426 J |
149 | static int read_emacs_mule_char (int, int (*) (int, Lisp_Object), |
150 | Lisp_Object); | |
8792be66 | 151 | |
defb1411 | 152 | static void readevalloop (Lisp_Object, FILE*, Lisp_Object, int, |
f57e2426 J |
153 | Lisp_Object, Lisp_Object, |
154 | Lisp_Object, Lisp_Object); | |
155 | static Lisp_Object load_unwind (Lisp_Object); | |
156 | static Lisp_Object load_descriptor_unwind (Lisp_Object); | |
550a625e | 157 | |
e4d29b33 | 158 | static void invalid_syntax (const char *) NO_RETURN; |
971de7fb | 159 | static void end_of_file_error (void) NO_RETURN; |
336d4a9c | 160 | |
078e7b4a | 161 | \f |
8792be66 KH |
162 | /* Functions that read one byte from the current source READCHARFUN |
163 | or unreads one byte. If the integer argument C is -1, it returns | |
164 | one read byte, or -1 when there's no more byte in the source. If C | |
165 | is 0 or positive, it unreads C, and the return value is not | |
166 | interesting. */ | |
167 | ||
f57e2426 J |
168 | static int readbyte_for_lambda (int, Lisp_Object); |
169 | static int readbyte_from_file (int, Lisp_Object); | |
170 | static int readbyte_from_string (int, Lisp_Object); | |
8792be66 | 171 | |
078e7b4a JB |
172 | /* Handle unreading and rereading of characters. |
173 | Write READCHAR to read a character, | |
fe0e03f3 KH |
174 | UNREAD(c) to unread c to be read again. |
175 | ||
8792be66 | 176 | These macros correctly read/unread multibyte characters. */ |
078e7b4a | 177 | |
1202434b | 178 | #define READCHAR readchar (readcharfun, NULL) |
078e7b4a JB |
179 | #define UNREAD(c) unreadchar (readcharfun, c) |
180 | ||
1202434b KH |
181 | /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */ |
182 | #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte) | |
183 | ||
8792be66 | 184 | /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char, |
8f924df7 KH |
185 | Qlambda, or a cons, we use this to keep an unread character because |
186 | a file stream can't handle multibyte-char unreading. The value -1 | |
48def666 | 187 | means that there's no unread character. */ |
8792be66 KH |
188 | static int unread_char; |
189 | ||
078e7b4a | 190 | static int |
971de7fb | 191 | readchar (Lisp_Object readcharfun, int *multibyte) |
078e7b4a JB |
192 | { |
193 | Lisp_Object tem; | |
95384e1e | 194 | register int c; |
f57e2426 | 195 | int (*readbyte) (int, Lisp_Object); |
8792be66 KH |
196 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; |
197 | int i, len; | |
198 | int emacs_mule_encoding = 0; | |
078e7b4a | 199 | |
1202434b KH |
200 | if (multibyte) |
201 | *multibyte = 0; | |
202 | ||
abb13b09 | 203 | readchar_count++; |
177c0ea7 | 204 | |
cfff016d | 205 | if (BUFFERP (readcharfun)) |
078e7b4a | 206 | { |
bed23cb2 | 207 | register struct buffer *inbuffer = XBUFFER (readcharfun); |
078e7b4a | 208 | |
d311d28c | 209 | ptrdiff_t pt_byte = BUF_PT_BYTE (inbuffer); |
00a9a935 | 210 | |
bed23cb2 RS |
211 | if (pt_byte >= BUF_ZV_BYTE (inbuffer)) |
212 | return -1; | |
078e7b4a | 213 | |
4b4deea2 | 214 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 215 | { |
00a9a935 | 216 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
217 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, pt_byte); |
218 | BUF_INC_POS (inbuffer, pt_byte); | |
62a6e103 | 219 | c = STRING_CHAR (p); |
1202434b KH |
220 | if (multibyte) |
221 | *multibyte = 1; | |
bed23cb2 RS |
222 | } |
223 | else | |
224 | { | |
225 | c = BUF_FETCH_BYTE (inbuffer, pt_byte); | |
8792be66 KH |
226 | if (! ASCII_BYTE_P (c)) |
227 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 228 | pt_byte++; |
6f7f43d5 | 229 | } |
bed23cb2 | 230 | SET_BUF_PT_BOTH (inbuffer, BUF_PT (inbuffer) + 1, pt_byte); |
6f7f43d5 | 231 | |
bed23cb2 | 232 | return c; |
078e7b4a | 233 | } |
cfff016d | 234 | if (MARKERP (readcharfun)) |
078e7b4a | 235 | { |
bed23cb2 | 236 | register struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
078e7b4a | 237 | |
d311d28c | 238 | ptrdiff_t bytepos = marker_byte_position (readcharfun); |
00a9a935 | 239 | |
bed23cb2 RS |
240 | if (bytepos >= BUF_ZV_BYTE (inbuffer)) |
241 | return -1; | |
6f7f43d5 | 242 | |
4b4deea2 | 243 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 244 | { |
00a9a935 | 245 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
246 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, bytepos); |
247 | BUF_INC_POS (inbuffer, bytepos); | |
62a6e103 | 248 | c = STRING_CHAR (p); |
1202434b KH |
249 | if (multibyte) |
250 | *multibyte = 1; | |
bed23cb2 RS |
251 | } |
252 | else | |
253 | { | |
254 | c = BUF_FETCH_BYTE (inbuffer, bytepos); | |
8792be66 KH |
255 | if (! ASCII_BYTE_P (c)) |
256 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 257 | bytepos++; |
6f7f43d5 RS |
258 | } |
259 | ||
bed23cb2 RS |
260 | XMARKER (readcharfun)->bytepos = bytepos; |
261 | XMARKER (readcharfun)->charpos++; | |
262 | ||
263 | return c; | |
078e7b4a | 264 | } |
ad0153e4 RS |
265 | |
266 | if (EQ (readcharfun, Qlambda)) | |
8792be66 KH |
267 | { |
268 | readbyte = readbyte_for_lambda; | |
269 | goto read_multibyte; | |
270 | } | |
ad0153e4 | 271 | |
078e7b4a | 272 | if (EQ (readcharfun, Qget_file_char)) |
2c1b5dbe | 273 | { |
8792be66 KH |
274 | readbyte = readbyte_from_file; |
275 | goto read_multibyte; | |
2c1b5dbe | 276 | } |
078e7b4a | 277 | |
cfff016d | 278 | if (STRINGP (readcharfun)) |
078e7b4a | 279 | { |
bed23cb2 | 280 | if (read_from_string_index >= read_from_string_limit) |
078e7b4a | 281 | c = -1; |
1202434b KH |
282 | else if (STRING_MULTIBYTE (readcharfun)) |
283 | { | |
284 | if (multibyte) | |
285 | *multibyte = 1; | |
286 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, readcharfun, | |
287 | read_from_string_index, | |
288 | read_from_string_index_byte); | |
289 | } | |
f0354c03 | 290 | else |
1202434b KH |
291 | { |
292 | c = SREF (readcharfun, read_from_string_index_byte); | |
293 | read_from_string_index++; | |
294 | read_from_string_index_byte++; | |
295 | } | |
078e7b4a JB |
296 | return c; |
297 | } | |
298 | ||
8792be66 KH |
299 | if (CONSP (readcharfun)) |
300 | { | |
301 | /* This is the case that read_vector is reading from a unibyte | |
302 | string that contains a byte sequence previously skipped | |
303 | because of #@NUMBER. The car part of readcharfun is that | |
304 | string, and the cdr part is a value of readcharfun given to | |
305 | read_vector. */ | |
306 | readbyte = readbyte_from_string; | |
307 | if (EQ (XCDR (readcharfun), Qget_emacs_mule_file_char)) | |
308 | emacs_mule_encoding = 1; | |
309 | goto read_multibyte; | |
310 | } | |
8f924df7 | 311 | |
8792be66 KH |
312 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) |
313 | { | |
314 | readbyte = readbyte_from_file; | |
315 | emacs_mule_encoding = 1; | |
316 | goto read_multibyte; | |
317 | } | |
078e7b4a JB |
318 | |
319 | tem = call0 (readcharfun); | |
320 | ||
265a9e55 | 321 | if (NILP (tem)) |
078e7b4a JB |
322 | return -1; |
323 | return XINT (tem); | |
8792be66 KH |
324 | |
325 | read_multibyte: | |
326 | if (unread_char >= 0) | |
327 | { | |
328 | c = unread_char; | |
329 | unread_char = -1; | |
330 | return c; | |
331 | } | |
332 | c = (*readbyte) (-1, readcharfun); | |
1202434b KH |
333 | if (c < 0 || load_each_byte) |
334 | return c; | |
335 | if (multibyte) | |
336 | *multibyte = 1; | |
337 | if (ASCII_BYTE_P (c)) | |
8792be66 KH |
338 | return c; |
339 | if (emacs_mule_encoding) | |
340 | return read_emacs_mule_char (c, readbyte, readcharfun); | |
341 | i = 0; | |
342 | buf[i++] = c; | |
343 | len = BYTES_BY_CHAR_HEAD (c); | |
344 | while (i < len) | |
345 | { | |
346 | c = (*readbyte) (-1, readcharfun); | |
347 | if (c < 0 || ! TRAILING_CODE_P (c)) | |
348 | { | |
349 | while (--i > 1) | |
350 | (*readbyte) (buf[i], readcharfun); | |
351 | return BYTE8_TO_CHAR (buf[0]); | |
352 | } | |
353 | buf[i++] = c; | |
354 | } | |
62a6e103 | 355 | return STRING_CHAR (buf); |
078e7b4a JB |
356 | } |
357 | ||
358 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
359 | If the stream is a user function, call it with the char as argument. */ | |
360 | ||
361 | static void | |
971de7fb | 362 | unreadchar (Lisp_Object readcharfun, int c) |
078e7b4a | 363 | { |
abb13b09 | 364 | readchar_count--; |
92fddec9 KH |
365 | if (c == -1) |
366 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
367 | since readchar didn't advance it when we read it. */ | |
368 | ; | |
cfff016d | 369 | else if (BUFFERP (readcharfun)) |
d7760ca9 | 370 | { |
bed23cb2 | 371 | struct buffer *b = XBUFFER (readcharfun); |
d311d28c PE |
372 | ptrdiff_t charpos = BUF_PT (b); |
373 | ptrdiff_t bytepos = BUF_PT_BYTE (b); | |
d7760ca9 | 374 | |
4b4deea2 | 375 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 376 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 377 | else |
8792be66 | 378 | bytepos--; |
d7760ca9 | 379 | |
cffc6f3b | 380 | SET_BUF_PT_BOTH (b, charpos - 1, bytepos); |
d7760ca9 | 381 | } |
cfff016d | 382 | else if (MARKERP (readcharfun)) |
d7760ca9 | 383 | { |
bed23cb2 | 384 | struct buffer *b = XMARKER (readcharfun)->buffer; |
d311d28c | 385 | ptrdiff_t bytepos = XMARKER (readcharfun)->bytepos; |
d7760ca9 | 386 | |
8792be66 | 387 | XMARKER (readcharfun)->charpos--; |
4b4deea2 | 388 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 389 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 390 | else |
8792be66 | 391 | bytepos--; |
d7760ca9 | 392 | |
8792be66 | 393 | XMARKER (readcharfun)->bytepos = bytepos; |
d7760ca9 | 394 | } |
cfff016d | 395 | else if (STRINGP (readcharfun)) |
bed23cb2 RS |
396 | { |
397 | read_from_string_index--; | |
398 | read_from_string_index_byte | |
399 | = string_char_to_byte (readcharfun, read_from_string_index); | |
400 | } | |
8792be66 KH |
401 | else if (CONSP (readcharfun)) |
402 | { | |
403 | unread_char = c; | |
404 | } | |
ad0153e4 | 405 | else if (EQ (readcharfun, Qlambda)) |
8792be66 KH |
406 | { |
407 | unread_char = c; | |
408 | } | |
409 | else if (EQ (readcharfun, Qget_file_char) | |
410 | || EQ (readcharfun, Qget_emacs_mule_file_char)) | |
411 | { | |
412 | if (load_each_byte) | |
d85d3839 MB |
413 | { |
414 | BLOCK_INPUT; | |
415 | ungetc (c, instream); | |
416 | UNBLOCK_INPUT; | |
417 | } | |
8792be66 KH |
418 | else |
419 | unread_char = c; | |
420 | } | |
078e7b4a JB |
421 | else |
422 | call1 (readcharfun, make_number (c)); | |
423 | } | |
424 | ||
8792be66 | 425 | static int |
971de7fb | 426 | readbyte_for_lambda (int c, Lisp_Object readcharfun) |
8792be66 KH |
427 | { |
428 | return read_bytecode_char (c >= 0); | |
429 | } | |
430 | ||
431 | ||
432 | static int | |
971de7fb | 433 | readbyte_from_file (int c, Lisp_Object readcharfun) |
8792be66 KH |
434 | { |
435 | if (c >= 0) | |
436 | { | |
66cd0949 | 437 | BLOCK_INPUT; |
8792be66 | 438 | ungetc (c, instream); |
66cd0949 | 439 | UNBLOCK_INPUT; |
8792be66 KH |
440 | return 0; |
441 | } | |
442 | ||
d85d3839 | 443 | BLOCK_INPUT; |
8792be66 | 444 | c = getc (instream); |
d85d3839 | 445 | |
8792be66 | 446 | #ifdef EINTR |
48def666 | 447 | /* Interrupted reads have been observed while reading over the network. */ |
d85d3839 MB |
448 | while (c == EOF && ferror (instream) && errno == EINTR) |
449 | { | |
57cb2e6f | 450 | UNBLOCK_INPUT; |
d85d3839 | 451 | QUIT; |
d85d3839 | 452 | BLOCK_INPUT; |
57cb2e6f | 453 | clearerr (instream); |
d85d3839 | 454 | c = getc (instream); |
66cd0949 | 455 | } |
8792be66 | 456 | #endif |
d85d3839 | 457 | |
57cb2e6f MB |
458 | UNBLOCK_INPUT; |
459 | ||
8792be66 KH |
460 | return (c == EOF ? -1 : c); |
461 | } | |
462 | ||
463 | static int | |
971de7fb | 464 | readbyte_from_string (int c, Lisp_Object readcharfun) |
8792be66 KH |
465 | { |
466 | Lisp_Object string = XCAR (readcharfun); | |
467 | ||
468 | if (c >= 0) | |
469 | { | |
470 | read_from_string_index--; | |
471 | read_from_string_index_byte | |
472 | = string_char_to_byte (string, read_from_string_index); | |
473 | } | |
8f924df7 | 474 | |
8792be66 KH |
475 | if (read_from_string_index >= read_from_string_limit) |
476 | c = -1; | |
477 | else | |
478 | FETCH_STRING_CHAR_ADVANCE (c, string, | |
479 | read_from_string_index, | |
480 | read_from_string_index_byte); | |
481 | return c; | |
482 | } | |
483 | ||
484 | ||
485 | /* Read one non-ASCII character from INSTREAM. The character is | |
486 | encoded in `emacs-mule' and the first byte is already read in | |
487 | C. */ | |
488 | ||
8792be66 | 489 | static int |
971de7fb | 490 | read_emacs_mule_char (int c, int (*readbyte) (int, Lisp_Object), Lisp_Object readcharfun) |
8792be66 KH |
491 | { |
492 | /* Emacs-mule coding uses at most 4-byte for one character. */ | |
493 | unsigned char buf[4]; | |
494 | int len = emacs_mule_bytes[c]; | |
495 | struct charset *charset; | |
496 | int i; | |
497 | unsigned code; | |
498 | ||
499 | if (len == 1) | |
500 | /* C is not a valid leading-code of `emacs-mule'. */ | |
501 | return BYTE8_TO_CHAR (c); | |
502 | ||
503 | i = 0; | |
504 | buf[i++] = c; | |
505 | while (i < len) | |
506 | { | |
507 | c = (*readbyte) (-1, readcharfun); | |
508 | if (c < 0xA0) | |
509 | { | |
510 | while (--i > 1) | |
511 | (*readbyte) (buf[i], readcharfun); | |
512 | return BYTE8_TO_CHAR (buf[0]); | |
513 | } | |
514 | buf[i++] = c; | |
515 | } | |
516 | ||
517 | if (len == 2) | |
518 | { | |
b84ae584 | 519 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
520 | code = buf[1] & 0x7F; |
521 | } | |
522 | else if (len == 3) | |
523 | { | |
524 | if (buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11 | |
525 | || buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
526 | { | |
b84ae584 | 527 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8792be66 KH |
528 | code = buf[2] & 0x7F; |
529 | } | |
530 | else | |
531 | { | |
b84ae584 | 532 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
533 | code = ((buf[1] << 8) | buf[2]) & 0x7F7F; |
534 | } | |
535 | } | |
536 | else | |
537 | { | |
b84ae584 | 538 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8f924df7 | 539 | code = ((buf[2] << 8) | buf[3]) & 0x7F7F; |
8792be66 KH |
540 | } |
541 | c = DECODE_CHAR (charset, code); | |
542 | if (c < 0) | |
543 | Fsignal (Qinvalid_read_syntax, | |
544 | Fcons (build_string ("invalid multibyte form"), Qnil)); | |
545 | return c; | |
546 | } | |
547 | ||
548 | ||
f57e2426 J |
549 | static Lisp_Object read_internal_start (Lisp_Object, Lisp_Object, |
550 | Lisp_Object); | |
551 | static Lisp_Object read0 (Lisp_Object); | |
552 | static Lisp_Object read1 (Lisp_Object, int *, int); | |
abb13b09 | 553 | |
f57e2426 J |
554 | static Lisp_Object read_list (int, Lisp_Object); |
555 | static Lisp_Object read_vector (Lisp_Object, int); | |
abb13b09 | 556 | |
f57e2426 J |
557 | static Lisp_Object substitute_object_recurse (Lisp_Object, Lisp_Object, |
558 | Lisp_Object); | |
559 | static void substitute_object_in_subtree (Lisp_Object, | |
560 | Lisp_Object); | |
561 | static void substitute_in_interval (INTERVAL, Lisp_Object); | |
9e062b6c | 562 | |
078e7b4a | 563 | \f |
bed23cb2 | 564 | /* Get a character from the tty. */ |
078e7b4a | 565 | |
f42be754 JB |
566 | /* Read input events until we get one that's acceptable for our purposes. |
567 | ||
568 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
569 | until we get a character we like, and then stuffed into | |
570 | unread_switch_frame. | |
571 | ||
572 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
573 | if the unmodified version of the symbol has a Qascii_character | |
574 | property, and use that character, if present. | |
575 | ||
576 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
577 | get isn't an ASCII character with modifiers. If it's zero but | |
578 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
bb49a192 RS |
579 | character. |
580 | ||
581 | If INPUT_METHOD is nonzero, we invoke the current input method | |
50e48299 CY |
582 | if the character warrants that. |
583 | ||
584 | If SECONDS is a number, we wait that many seconds for input, and | |
585 | return Qnil if no input arrives within that time. */ | |
cc39bc38 | 586 | |
2f7c71a1 | 587 | static Lisp_Object |
d5a3eaaf AS |
588 | read_filtered_event (int no_switch_frame, int ascii_required, |
589 | int error_nonascii, int input_method, Lisp_Object seconds) | |
f42be754 | 590 | { |
4332cf50 | 591 | Lisp_Object val, delayed_switch_frame; |
50e48299 | 592 | EMACS_TIME end_time; |
153a17b7 | 593 | |
5dbf89bc | 594 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
595 | if (display_hourglass_p) |
596 | cancel_hourglass (); | |
5dbf89bc | 597 | #endif |
177c0ea7 | 598 | |
153a17b7 | 599 | delayed_switch_frame = Qnil; |
f42be754 | 600 | |
50e48299 CY |
601 | /* Compute timeout. */ |
602 | if (NUMBERP (seconds)) | |
603 | { | |
604 | EMACS_TIME wait_time; | |
605 | int sec, usec; | |
51d8b30e | 606 | double duration = extract_float (seconds); |
50e48299 | 607 | |
1ab7b8ac PE |
608 | if (0 < duration) |
609 | duration_to_sec_usec (duration, &sec, &usec); | |
610 | else | |
611 | sec = usec = 0; | |
612 | ||
50e48299 CY |
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 | 841 | /* Stop scanning if no colon was found before end marker. */ |
ad3a2b41 | 842 | if (!in_file_vars || ch == '\n' || ch == EOF) |
db7a0b4f AS |
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) | |
ad3a2b41 | 866 | /* The value was terminated by an end-marker, which remove. */ |
06a0259a PE |
867 | i -= 3; |
868 | while (i > 0 && (val[i - 1] == ' ' || val[i - 1] == '\t')) | |
869 | i--; | |
870 | val[i] = '\0'; | |
b9598260 SM |
871 | |
872 | if (strcmp (var, "lexical-binding") == 0) | |
873 | /* This is it... */ | |
874 | { | |
875 | rv = (strcmp (val, "nil") != 0); | |
876 | break; | |
877 | } | |
878 | } | |
879 | } | |
880 | ||
881 | while (ch != '\n' && ch != EOF) | |
882 | ch = READCHAR; | |
883 | ||
884 | return rv; | |
885 | } | |
886 | } | |
b9598260 | 887 | \f |
8792be66 | 888 | /* Value is a version number of byte compiled code if the file |
c73bd236 | 889 | associated with file descriptor FD is a compiled Lisp file that's |
8792be66 KH |
890 | safe to load. Only files compiled with Emacs are safe to load. |
891 | Files compiled with XEmacs can lead to a crash in Fbyte_code | |
892 | because of an incompatible change in the byte compiler. */ | |
da84f340 GM |
893 | |
894 | static int | |
971de7fb | 895 | safe_to_load_p (int fd) |
da84f340 GM |
896 | { |
897 | char buf[512]; | |
898 | int nbytes, i; | |
899 | int safe_p = 1; | |
8f924df7 | 900 | int version = 1; |
da84f340 GM |
901 | |
902 | /* Read the first few bytes from the file, and look for a line | |
903 | specifying the byte compiler version used. */ | |
904 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
905 | if (nbytes > 0) | |
906 | { | |
907 | buf[nbytes] = '\0'; | |
908 | ||
909 | /* Skip to the next newline, skipping over the initial `ELC' | |
1da3b9e4 | 910 | with NUL bytes following it, but note the version. */ |
da84f340 | 911 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) |
1da3b9e4 | 912 | if (i == 4) |
8792be66 | 913 | version = buf[i]; |
da84f340 | 914 | |
e6eb4e9e | 915 | if (i >= nbytes |
927f12da | 916 | || fast_c_string_match_ignore_case (Vbytecomp_version_regexp, |
da84f340 GM |
917 | buf + i) < 0) |
918 | safe_p = 0; | |
919 | } | |
1da3b9e4 DL |
920 | if (safe_p) |
921 | safe_p = version; | |
da84f340 GM |
922 | |
923 | lseek (fd, 0, SEEK_SET); | |
924 | return safe_p; | |
925 | } | |
926 | ||
927 | ||
7ee3bd7b GM |
928 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
929 | after loading a file successfully. */ | |
930 | ||
931 | static Lisp_Object | |
971de7fb | 932 | record_load_unwind (Lisp_Object old) |
7ee3bd7b GM |
933 | { |
934 | return Vloads_in_progress = old; | |
935 | } | |
936 | ||
164c8bfe RS |
937 | /* This handler function is used via internal_condition_case_1. */ |
938 | ||
939 | static Lisp_Object | |
971de7fb | 940 | load_error_handler (Lisp_Object data) |
164c8bfe RS |
941 | { |
942 | return Qnil; | |
943 | } | |
7ee3bd7b | 944 | |
1d064697 | 945 | static Lisp_Object |
971de7fb | 946 | load_warn_old_style_backquotes (Lisp_Object file) |
1d064697 SM |
947 | { |
948 | if (!NILP (Vold_style_backquotes)) | |
949 | { | |
b636b4c1 | 950 | Lisp_Object args[2]; |
18a4a65e | 951 | args[0] = build_string ("Loading `%s': old-style backquotes detected!"); |
1d064697 SM |
952 | args[1] = file; |
953 | Fmessage (2, args); | |
954 | } | |
955 | return Qnil; | |
956 | } | |
957 | ||
a7ca3326 | 958 | DEFUN ("get-load-suffixes", Fget_load_suffixes, Sget_load_suffixes, 0, 0, 0, |
971a4293 LT |
959 | doc: /* Return the suffixes that `load' should try if a suffix is \ |
960 | required. | |
961 | This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */) | |
5842a27b | 962 | (void) |
971a4293 LT |
963 | { |
964 | Lisp_Object lst = Qnil, suffixes = Vload_suffixes, suffix, ext; | |
965 | while (CONSP (suffixes)) | |
966 | { | |
967 | Lisp_Object exts = Vload_file_rep_suffixes; | |
968 | suffix = XCAR (suffixes); | |
969 | suffixes = XCDR (suffixes); | |
970 | while (CONSP (exts)) | |
971 | { | |
972 | ext = XCAR (exts); | |
973 | exts = XCDR (exts); | |
974 | lst = Fcons (concat2 (suffix, ext), lst); | |
975 | } | |
976 | } | |
977 | return Fnreverse (lst); | |
978 | } | |
979 | ||
a7ca3326 | 980 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
981 | doc: /* Execute a file of Lisp code named FILE. |
982 | First try FILE with `.elc' appended, then try with `.el', | |
971a4293 | 983 | then try FILE unmodified (the exact suffixes in the exact order are |
88852d45 | 984 | determined by `load-suffixes'). Environment variable references in |
971a4293 | 985 | FILE are replaced with their values by calling `substitute-in-file-name'. |
5de38842 | 986 | This function searches the directories in `load-path'. |
971a4293 | 987 | |
5de38842 | 988 | If optional second arg NOERROR is non-nil, |
971a4293 | 989 | report no error if FILE doesn't exist. |
5de38842 | 990 | Print messages at start and end of loading unless |
beb0b7f9 EZ |
991 | optional third arg NOMESSAGE is non-nil (but `force-load-messages' |
992 | overrides that). | |
5de38842 | 993 | If optional fourth arg NOSUFFIX is non-nil, don't try adding |
971a4293 | 994 | suffixes `.elc' or `.el' to the specified name FILE. |
5de38842 | 995 | If optional fifth arg MUST-SUFFIX is non-nil, insist on |
971a4293 LT |
996 | the suffix `.elc' or `.el'; don't accept just FILE unless |
997 | it ends in one of those suffixes or includes a directory name. | |
998 | ||
999 | If this function fails to find a file, it may look for different | |
1000 | representations of that file before trying another file. | |
1001 | It does so by adding the non-empty suffixes in `load-file-rep-suffixes' | |
1002 | to the file name. Emacs uses this feature mainly to find compressed | |
1003 | versions of files when Auto Compression mode is enabled. | |
1004 | ||
1005 | The exact suffixes that this function tries out, in the exact order, | |
1006 | are given by the value of the variable `load-file-rep-suffixes' if | |
1007 | NOSUFFIX is non-nil and by the return value of the function | |
1008 | `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and | |
1009 | MUST-SUFFIX are nil, this function first tries out the latter suffixes | |
1010 | and then the former. | |
0fc213e9 RS |
1011 | |
1012 | Loading a file records its definitions, and its `provide' and | |
1013 | `require' calls, in an element of `load-history' whose | |
1014 | car is the file name loaded. See `load-history'. | |
1015 | ||
c7926fe2 EZ |
1016 | While the file is in the process of being loaded, the variable |
1017 | `load-in-progress' is non-nil and the variable `load-file-name' | |
1018 | is bound to the file's name. | |
1019 | ||
971a4293 | 1020 | Return t if the file exists and loads successfully. */) |
5842a27b | 1021 | (Lisp_Object file, Lisp_Object noerror, Lisp_Object nomessage, Lisp_Object nosuffix, Lisp_Object must_suffix) |
078e7b4a JB |
1022 | { |
1023 | register FILE *stream; | |
1024 | register int fd = -1; | |
d311d28c | 1025 | ptrdiff_t count = SPECPDL_INDEX (); |
6bb6da3e AM |
1026 | struct gcpro gcpro1, gcpro2, gcpro3; |
1027 | Lisp_Object found, efound, hist_file_name; | |
04fc68e7 RS |
1028 | /* 1 means we printed the ".el is newer" message. */ |
1029 | int newer = 0; | |
1030 | /* 1 means we are loading a compiled file. */ | |
1031 | int compiled = 0; | |
c2225d00 | 1032 | Lisp_Object handler; |
456c67a4 | 1033 | int safe_p = 1; |
8ea90aa3 | 1034 | const char *fmode = "r"; |
6bb6da3e | 1035 | Lisp_Object tmp[2]; |
8792be66 KH |
1036 | int version; |
1037 | ||
317073d5 | 1038 | #ifdef DOS_NT |
229ba775 | 1039 | fmode = "rt"; |
317073d5 | 1040 | #endif /* DOS_NT */ |
078e7b4a | 1041 | |
b7826503 | 1042 | CHECK_STRING (file); |
078e7b4a | 1043 | |
c2225d00 | 1044 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
1045 | /* This shouldn't be necessary any more now that `openp' handles it right. |
1046 | handler = Ffind_file_name_handler (file, Qload); | |
1047 | if (!NILP (handler)) | |
1048 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 1049 | |
07a0bda3 RS |
1050 | /* Do this after the handler to avoid |
1051 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
1052 | (Below here, we care only whether they are nil or not.) |
1053 | The presence of this call is the result of a historical accident: | |
6bb6da3e | 1054 | it used to be in every file-operation and when it got removed |
e61b9b87 SM |
1055 | everywhere, it accidentally stayed here. Since then, enough people |
1056 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
1057 | that it seemed risky to remove. */ | |
164c8bfe RS |
1058 | if (! NILP (noerror)) |
1059 | { | |
1060 | file = internal_condition_case_1 (Fsubstitute_in_file_name, file, | |
1061 | Qt, load_error_handler); | |
1062 | if (NILP (file)) | |
1063 | return Qnil; | |
1064 | } | |
1065 | else | |
1066 | file = Fsubstitute_in_file_name (file); | |
177c0ea7 | 1067 | |
07a0bda3 | 1068 | |
078e7b4a | 1069 | /* Avoid weird lossage with null string as arg, |
48def666 | 1070 | since it would try to load a directory as a Lisp file. */ |
82cb60d3 | 1071 | if (SBYTES (file) > 0) |
078e7b4a | 1072 | { |
82cb60d3 | 1073 | ptrdiff_t size = SBYTES (file); |
211f7dcd | 1074 | |
0fc213e9 RS |
1075 | found = Qnil; |
1076 | GCPRO2 (file, found); | |
211f7dcd RS |
1077 | |
1078 | if (! NILP (must_suffix)) | |
1079 | { | |
1080 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
1081 | if (size > 3 | |
42a5b22f | 1082 | && !strcmp (SSDATA (file) + size - 3, ".el")) |
211f7dcd RS |
1083 | must_suffix = Qnil; |
1084 | else if (size > 4 | |
42a5b22f | 1085 | && !strcmp (SSDATA (file) + size - 4, ".elc")) |
211f7dcd RS |
1086 | must_suffix = Qnil; |
1087 | /* Don't insist on adding a suffix | |
1088 | if the argument includes a directory name. */ | |
1089 | else if (! NILP (Ffile_name_directory (file))) | |
1090 | must_suffix = Qnil; | |
1091 | } | |
1092 | ||
f0a50954 | 1093 | fd = openp (Vload_path, file, |
e61b9b87 | 1094 | (!NILP (nosuffix) ? Qnil |
971a4293 LT |
1095 | : !NILP (must_suffix) ? Fget_load_suffixes () |
1096 | : Fappend (2, (tmp[0] = Fget_load_suffixes (), | |
1097 | tmp[1] = Vload_file_rep_suffixes, | |
e61b9b87 | 1098 | tmp))), |
86d00812 | 1099 | &found, Qnil); |
5a6e5452 | 1100 | UNGCPRO; |
078e7b4a JB |
1101 | } |
1102 | ||
96dc0f4e | 1103 | if (fd == -1) |
078e7b4a | 1104 | { |
265a9e55 | 1105 | if (NILP (noerror)) |
336d4a9c KS |
1106 | xsignal2 (Qfile_error, build_string ("Cannot open load file"), file); |
1107 | return Qnil; | |
078e7b4a JB |
1108 | } |
1109 | ||
ba0d1195 | 1110 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
1111 | if (EQ (Qt, Vuser_init_file)) |
1112 | Vuser_init_file = found; | |
1113 | ||
96dc0f4e MB |
1114 | /* If FD is -2, that means openp found a magic file. */ |
1115 | if (fd == -2) | |
74549846 | 1116 | { |
5e24a1f7 KH |
1117 | if (NILP (Fequal (found, file))) |
1118 | /* If FOUND is a different file name from FILE, | |
1119 | find its handler even if we have already inhibited | |
1120 | the `load' operation on FILE. */ | |
1121 | handler = Ffind_file_name_handler (found, Qt); | |
1122 | else | |
1123 | handler = Ffind_file_name_handler (found, Qload); | |
1124 | if (! NILP (handler)) | |
1125 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
35774242 EZ |
1126 | #ifdef DOS_NT |
1127 | /* Tramp has to deal with semi-broken packages that prepend | |
1128 | drive letters to remote files. For that reason, Tramp | |
1129 | catches file operations that test for file existence, which | |
1130 | makes openp think X:/foo.elc files are remote. However, | |
1131 | Tramp does not catch `load' operations for such files, so we | |
1132 | end up with a nil as the `load' handler above. If we would | |
1133 | continue with fd = -2, we will behave wrongly, and in | |
1134 | particular try reading a .elc file in the "rt" mode instead | |
1135 | of "rb". See bug #9311 for the results. To work around | |
1136 | this, we try to open the file locally, and go with that if it | |
1137 | succeeds. */ | |
1138 | fd = emacs_open (SSDATA (ENCODE_FILE (found)), O_RDONLY, 0); | |
1139 | if (fd == -1) | |
1140 | fd = -2; | |
1141 | #endif | |
74549846 RS |
1142 | } |
1143 | ||
550a625e GM |
1144 | /* Check if we're stuck in a recursive load cycle. |
1145 | ||
1146 | 2000-09-21: It's not possible to just check for the file loaded | |
1147 | being a member of Vloads_in_progress. This fails because of the | |
1148 | way the byte compiler currently works; `provide's are not | |
9d438325 | 1149 | evaluated, see font-lock.el/jit-lock.el as an example. This |
550a625e GM |
1150 | leads to a certain amount of ``normal'' recursion. |
1151 | ||
1152 | Also, just loading a file recursively is not always an error in | |
1153 | the general case; the second load may do something different. */ | |
3ba6fd9a | 1154 | { |
0902fe45 | 1155 | int load_count = 0; |
3ba6fd9a RS |
1156 | Lisp_Object tem; |
1157 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
0902fe45 | 1158 | if (!NILP (Fequal (found, XCAR (tem))) && (++load_count > 3)) |
8fc45744 JB |
1159 | { |
1160 | if (fd >= 0) | |
1161 | emacs_close (fd); | |
1162 | signal_error ("Recursive load", Fcons (found, Vloads_in_progress)); | |
1163 | } | |
3ba6fd9a RS |
1164 | record_unwind_protect (record_load_unwind, Vloads_in_progress); |
1165 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
1166 | } | |
7ee3bd7b | 1167 | |
b9598260 SM |
1168 | /* All loads are by default dynamic, unless the file itself specifies |
1169 | otherwise using a file-variable in the first line. This is bound here | |
1170 | so that it takes effect whether or not we use | |
1171 | Vload_source_file_function. */ | |
1172 | specbind (Qlexical_binding, Qnil); | |
1173 | ||
48def666 | 1174 | /* Get the name for load-history. */ |
6bb6da3e AM |
1175 | hist_file_name = (! NILP (Vpurify_flag) |
1176 | ? Fconcat (2, (tmp[0] = Ffile_name_directory (file), | |
1177 | tmp[1] = Ffile_name_nondirectory (found), | |
1178 | tmp)) | |
1179 | : found) ; | |
1180 | ||
8792be66 | 1181 | version = -1; |
1bb9a689 | 1182 | |
88852d45 | 1183 | /* Check for the presence of old-style quotes and warn about them. */ |
1d064697 SM |
1184 | specbind (Qold_style_backquotes, Qnil); |
1185 | record_unwind_protect (load_warn_old_style_backquotes, file); | |
1186 | ||
72af86bd | 1187 | if (!memcmp (SDATA (found) + SBYTES (found) - 4, ".elc", 4) |
74327f7a | 1188 | || (fd >= 0 && (version = safe_to_load_p (fd)) > 0)) |
96dc0f4e MB |
1189 | /* Load .elc files directly, but not when they are |
1190 | remote and have no handler! */ | |
078e7b4a | 1191 | { |
96dc0f4e | 1192 | if (fd != -2) |
da84f340 | 1193 | { |
96dc0f4e MB |
1194 | struct stat s1, s2; |
1195 | int result; | |
da84f340 | 1196 | |
6bb6da3e | 1197 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1198 | |
8792be66 KH |
1199 | if (version < 0 |
1200 | && ! (version = safe_to_load_p (fd))) | |
96dc0f4e MB |
1201 | { |
1202 | safe_p = 0; | |
1203 | if (!load_dangerous_libraries) | |
e63304b7 DL |
1204 | { |
1205 | if (fd >= 0) | |
1206 | emacs_close (fd); | |
1207 | error ("File `%s' was not compiled in Emacs", | |
1208 | SDATA (found)); | |
1209 | } | |
beb0b7f9 | 1210 | else if (!NILP (nomessage) && !force_load_messages) |
96dc0f4e MB |
1211 | message_with_string ("File `%s' not compiled in Emacs", found, 1); |
1212 | } | |
04fc68e7 | 1213 | |
96dc0f4e MB |
1214 | compiled = 1; |
1215 | ||
eb191db2 EZ |
1216 | efound = ENCODE_FILE (found); |
1217 | ||
26fbf20b | 1218 | #ifdef DOS_NT |
96dc0f4e | 1219 | fmode = "rb"; |
26fbf20b | 1220 | #endif /* DOS_NT */ |
e5533da6 PE |
1221 | result = stat (SSDATA (efound), &s1); |
1222 | if (result == 0) | |
1223 | { | |
1224 | SSET (efound, SBYTES (efound) - 1, 0); | |
1225 | result = stat (SSDATA (efound), &s2); | |
1226 | SSET (efound, SBYTES (efound) - 1, 'c'); | |
1227 | } | |
eb191db2 | 1228 | |
d37ca623 | 1229 | if (result == 0 && s1.st_mtime < s2.st_mtime) |
96dc0f4e MB |
1230 | { |
1231 | /* Make the progress messages mention that source is newer. */ | |
1232 | newer = 1; | |
04fc68e7 | 1233 | |
96dc0f4e | 1234 | /* If we won't print another message, mention this anyway. */ |
beb0b7f9 | 1235 | if (!NILP (nomessage) && !force_load_messages) |
714d8c39 | 1236 | { |
0fc213e9 RS |
1237 | Lisp_Object msg_file; |
1238 | msg_file = Fsubstring (found, make_number (0), make_number (-1)); | |
714d8c39 | 1239 | message_with_string ("Source file `%s' newer than byte-compiled file", |
0fc213e9 | 1240 | msg_file, 1); |
714d8c39 | 1241 | } |
96dc0f4e | 1242 | } |
0fc213e9 | 1243 | UNGCPRO; |
51ac6f83 | 1244 | } |
078e7b4a | 1245 | } |
fe0e03f3 KH |
1246 | else |
1247 | { | |
1248 | /* We are loading a source file (*.el). */ | |
1249 | if (!NILP (Vload_source_file_function)) | |
1250 | { | |
7ee3bd7b | 1251 | Lisp_Object val; |
96dc0f4e MB |
1252 | |
1253 | if (fd >= 0) | |
68c45bf0 | 1254 | emacs_close (fd); |
6bb6da3e | 1255 | val = call4 (Vload_source_file_function, found, hist_file_name, |
7ee3bd7b | 1256 | NILP (noerror) ? Qnil : Qt, |
beb0b7f9 | 1257 | (NILP (nomessage) || force_load_messages) ? Qnil : Qt); |
7ee3bd7b | 1258 | return unbind_to (count, val); |
fe0e03f3 KH |
1259 | } |
1260 | } | |
078e7b4a | 1261 | |
6bb6da3e | 1262 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1263 | |
229ba775 | 1264 | #ifdef WINDOWSNT |
eb191db2 | 1265 | efound = ENCODE_FILE (found); |
35774242 EZ |
1266 | /* If we somehow got here with fd == -2, meaning the file is deemed |
1267 | to be remote, don't even try to reopen the file locally; just | |
1268 | force a failure instead. */ | |
1269 | if (fd >= 0) | |
1270 | { | |
1271 | emacs_close (fd); | |
1272 | stream = fopen (SSDATA (efound), fmode); | |
1273 | } | |
1274 | else | |
1275 | stream = NULL; | |
229ba775 EZ |
1276 | #else /* not WINDOWSNT */ |
1277 | stream = fdopen (fd, fmode); | |
1278 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
1279 | if (stream == 0) |
1280 | { | |
68c45bf0 | 1281 | emacs_close (fd); |
d5db4077 | 1282 | error ("Failure to create stdio stream for %s", SDATA (file)); |
078e7b4a JB |
1283 | } |
1284 | ||
4b104c41 | 1285 | if (! NILP (Vpurify_flag)) |
5e617bc2 | 1286 | Vpreloaded_file_list = Fcons (Fpurecopy (file), Vpreloaded_file_list); |
4b104c41 | 1287 | |
beb0b7f9 | 1288 | if (NILP (nomessage) || force_load_messages) |
04fc68e7 | 1289 | { |
da84f340 GM |
1290 | if (!safe_p) |
1291 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
1292 | file, 1); | |
1293 | else if (!compiled) | |
e28552a4 | 1294 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 1295 | else if (newer) |
e28552a4 RS |
1296 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
1297 | file, 1); | |
db5cae4b | 1298 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1299 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 1300 | } |
078e7b4a | 1301 | |
c04d9e70 | 1302 | record_unwind_protect (load_unwind, make_save_value (stream, 0)); |
d2c6be7f | 1303 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 1304 | specbind (Qload_file_name, found); |
74549846 | 1305 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
1306 | load_descriptor_list |
1307 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
2baf5e76 | 1308 | specbind (Qload_in_progress, Qt); |
b9598260 SM |
1309 | |
1310 | instream = stream; | |
1311 | if (lisp_file_lexically_bound_p (Qget_file_char)) | |
1312 | Fset (Qlexical_binding, Qt); | |
1313 | ||
ab2a47e1 | 1314 | if (! version || version >= 22) |
b883cdb2 | 1315 | readevalloop (Qget_file_char, stream, hist_file_name, |
defb1411 | 1316 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 KH |
1317 | else |
1318 | { | |
1319 | /* We can't handle a file which was compiled with | |
1320 | byte-compile-dynamic by older version of Emacs. */ | |
1321 | specbind (Qload_force_doc_strings, Qt); | |
defb1411 | 1322 | readevalloop (Qget_emacs_mule_file_char, stream, hist_file_name, |
768d4533 | 1323 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 | 1324 | } |
078e7b4a JB |
1325 | unbind_to (count, Qnil); |
1326 | ||
48def666 | 1327 | /* Run any eval-after-load forms for this file. */ |
428b13d6 | 1328 | if (!NILP (Ffboundp (Qdo_after_load_evaluation))) |
6bb6da3e AM |
1329 | call1 (Qdo_after_load_evaluation, hist_file_name) ; |
1330 | ||
078e7b4a JB |
1331 | UNGCPRO; |
1332 | ||
97dead2d | 1333 | xfree (saved_doc_string); |
b2a30870 RS |
1334 | saved_doc_string = 0; |
1335 | saved_doc_string_size = 0; | |
1336 | ||
70fdbb46 | 1337 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
1338 | prev_saved_doc_string = 0; |
1339 | prev_saved_doc_string_size = 0; | |
1340 | ||
beb0b7f9 | 1341 | if (!noninteractive && (NILP (nomessage) || force_load_messages)) |
04fc68e7 | 1342 | { |
da84f340 GM |
1343 | if (!safe_p) |
1344 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
1345 | file, 1); | |
1346 | else if (!compiled) | |
e28552a4 | 1347 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 1348 | else if (newer) |
e28552a4 RS |
1349 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
1350 | file, 1); | |
db5cae4b | 1351 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1352 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 1353 | } |
7ee3bd7b | 1354 | |
078e7b4a JB |
1355 | return Qt; |
1356 | } | |
1357 | ||
1358 | static Lisp_Object | |
48def666 | 1359 | load_unwind (Lisp_Object arg) /* Used as unwind-protect function in load. */ |
078e7b4a | 1360 | { |
ebfe97a2 KS |
1361 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
1362 | if (stream != NULL) | |
66cd0949 YM |
1363 | { |
1364 | BLOCK_INPUT; | |
1365 | fclose (stream); | |
1366 | UNBLOCK_INPUT; | |
1367 | } | |
078e7b4a JB |
1368 | return Qnil; |
1369 | } | |
1370 | ||
d2c6be7f | 1371 | static Lisp_Object |
971de7fb | 1372 | load_descriptor_unwind (Lisp_Object oldlist) |
d2c6be7f RS |
1373 | { |
1374 | load_descriptor_list = oldlist; | |
838abf56 | 1375 | return Qnil; |
d2c6be7f RS |
1376 | } |
1377 | ||
1378 | /* Close all descriptors in use for Floads. | |
1379 | This is used when starting a subprocess. */ | |
1380 | ||
1381 | void | |
971de7fb | 1382 | close_load_descs (void) |
d2c6be7f | 1383 | { |
f3849f25 | 1384 | #ifndef WINDOWSNT |
d2c6be7f | 1385 | Lisp_Object tail; |
9beb8baa | 1386 | for (tail = load_descriptor_list; CONSP (tail); tail = XCDR (tail)) |
68c45bf0 | 1387 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 1388 | #endif |
d2c6be7f | 1389 | } |
078e7b4a JB |
1390 | \f |
1391 | static int | |
971de7fb | 1392 | complete_filename_p (Lisp_Object pathname) |
078e7b4a | 1393 | { |
4b2dd274 | 1394 | register const unsigned char *s = SDATA (pathname); |
317073d5 | 1395 | return (IS_DIRECTORY_SEP (s[0]) |
d5db4077 | 1396 | || (SCHARS (pathname) > 2 |
7c2fb837 | 1397 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2]))); |
078e7b4a JB |
1398 | } |
1399 | ||
86d00812 SM |
1400 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
1401 | doc: /* Search for FILENAME through PATH. | |
57a131fb | 1402 | Returns the file's name in absolute form, or nil if not found. |
86d00812 SM |
1403 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
1404 | file name when searching. | |
1405 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
1406 | PREDICATE can also be an integer to pass to the access(2) function, | |
aa56f361 SM |
1407 | in which case file-name-handlers are ignored. |
1408 | This function will normally skip directories, so if you want it to find | |
1409 | directories, make sure the PREDICATE function returns `dir-ok' for them. */) | |
5842a27b | 1410 | (Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate) |
86d00812 SM |
1411 | { |
1412 | Lisp_Object file; | |
1413 | int fd = openp (path, filename, suffixes, &file, predicate); | |
1414 | if (NILP (predicate) && fd > 0) | |
1415 | close (fd); | |
1416 | return file; | |
1417 | } | |
1418 | ||
aa56f361 | 1419 | static Lisp_Object Qdir_ok; |
86d00812 | 1420 | |
078e7b4a JB |
1421 | /* Search for a file whose name is STR, looking in directories |
1422 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
1423 | On success, returns a file descriptor. On failure, returns -1. |
1424 | ||
e61b9b87 | 1425 | SUFFIXES is a list of strings containing possible suffixes. |
e0f24100 | 1426 | The empty suffix is automatically added if the list is empty. |
e61b9b87 | 1427 | |
86d00812 SM |
1428 | PREDICATE non-nil means don't open the files, |
1429 | just look for one that satisfies the predicate. In this case, | |
1430 | returns 1 on success. The predicate can be a lisp function or | |
1431 | an integer to pass to `access' (in which case file-name-handlers | |
1432 | are ignored). | |
078e7b4a JB |
1433 | |
1434 | If STOREPTR is nonzero, it points to a slot where the name of | |
1435 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
1436 | nil is stored there on failure. |
1437 | ||
96dc0f4e | 1438 | If the file we find is remote, return -2 |
86d00812 | 1439 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
1440 | |
1441 | int | |
971de7fb | 1442 | openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, Lisp_Object *storeptr, Lisp_Object predicate) |
078e7b4a JB |
1443 | { |
1444 | register int fd; | |
d311d28c | 1445 | ptrdiff_t fn_size = 100; |
078e7b4a JB |
1446 | char buf[100]; |
1447 | register char *fn = buf; | |
1448 | int absolute = 0; | |
d311d28c | 1449 | ptrdiff_t want_length; |
74549846 | 1450 | Lisp_Object filename; |
078e7b4a | 1451 | struct stat st; |
eb191db2 EZ |
1452 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
1453 | Lisp_Object string, tail, encoded_fn; | |
d311d28c | 1454 | ptrdiff_t max_suffix_len = 0; |
e61b9b87 | 1455 | |
6f8eafd1 SM |
1456 | CHECK_STRING (str); |
1457 | ||
e61b9b87 SM |
1458 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) |
1459 | { | |
f5df591a | 1460 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1461 | max_suffix_len = max (max_suffix_len, |
d5db4077 | 1462 | SBYTES (XCAR (tail))); |
e61b9b87 | 1463 | } |
078e7b4a | 1464 | |
8b9d426a | 1465 | string = filename = encoded_fn = Qnil; |
eb191db2 EZ |
1466 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1467 | ||
078e7b4a JB |
1468 | if (storeptr) |
1469 | *storeptr = Qnil; | |
1470 | ||
1471 | if (complete_filename_p (str)) | |
1472 | absolute = 1; | |
1473 | ||
e61b9b87 | 1474 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1475 | { |
e61b9b87 | 1476 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a | 1477 | if (!complete_filename_p (filename)) |
48def666 | 1478 | /* If there are non-absolute elts in PATH (eg "."). */ |
078e7b4a | 1479 | /* Of course, this could conceivably lose if luser sets |
48def666 | 1480 | default-directory to be something non-absolute... */ |
078e7b4a | 1481 | { |
4b4deea2 | 1482 | filename = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
078e7b4a | 1483 | if (!complete_filename_p (filename)) |
48def666 | 1484 | /* Give up on this path element! */ |
078e7b4a JB |
1485 | continue; |
1486 | } | |
1487 | ||
640ee02d | 1488 | /* Calculate maximum length of any filename made from |
078e7b4a | 1489 | this path element/specified file name and any possible suffix. */ |
640ee02d PE |
1490 | want_length = max_suffix_len + SBYTES (filename); |
1491 | if (fn_size <= want_length) | |
1492 | fn = (char *) alloca (fn_size = 100 + want_length); | |
078e7b4a | 1493 | |
078e7b4a | 1494 | /* Loop over suffixes. */ |
a74d1c97 | 1495 | for (tail = NILP (suffixes) ? Fcons (empty_unibyte_string, Qnil) : suffixes; |
e61b9b87 | 1496 | CONSP (tail); tail = XCDR (tail)) |
078e7b4a | 1497 | { |
82cb60d3 | 1498 | ptrdiff_t lsuffix = SBYTES (XCAR (tail)); |
74549846 | 1499 | Lisp_Object handler; |
eb191db2 | 1500 | int exists; |
078e7b4a | 1501 | |
c49afcd7 RS |
1502 | /* Concatenate path element/specified name with the suffix. |
1503 | If the directory starts with /:, remove that. */ | |
d5db4077 KR |
1504 | if (SCHARS (filename) > 2 |
1505 | && SREF (filename, 0) == '/' | |
1506 | && SREF (filename, 1) == ':') | |
c49afcd7 | 1507 | { |
42a5b22f | 1508 | strncpy (fn, SSDATA (filename) + 2, |
d5db4077 KR |
1509 | SBYTES (filename) - 2); |
1510 | fn[SBYTES (filename) - 2] = 0; | |
c49afcd7 RS |
1511 | } |
1512 | else | |
1513 | { | |
42a5b22f | 1514 | strncpy (fn, SSDATA (filename), |
d5db4077 KR |
1515 | SBYTES (filename)); |
1516 | fn[SBYTES (filename)] = 0; | |
c49afcd7 RS |
1517 | } |
1518 | ||
078e7b4a | 1519 | if (lsuffix != 0) /* Bug happens on CCI if lsuffix is 0. */ |
42a5b22f | 1520 | strncat (fn, SSDATA (XCAR (tail)), lsuffix); |
eb191db2 | 1521 | |
74549846 | 1522 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1523 | /* We used to only check for handlers on non-absolute file names: |
1524 | if (absolute) | |
1525 | handler = Qnil; | |
1526 | else | |
1527 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1528 | It's not clear why that was the case and it breaks things like | |
1529 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
eb191db2 | 1530 | string = build_string (fn); |
4773b8ca | 1531 | handler = Ffind_file_name_handler (string, Qfile_exists_p); |
86d00812 SM |
1532 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1533 | { | |
1534 | if (NILP (predicate)) | |
1535 | exists = !NILP (Ffile_readable_p (string)); | |
1536 | else | |
aa56f361 SM |
1537 | { |
1538 | Lisp_Object tmp = call1 (predicate, string); | |
1539 | exists = !NILP (tmp) | |
1540 | && (EQ (tmp, Qdir_ok) | |
aa0f73d1 | 1541 | || NILP (Ffile_directory_p (string))); |
aa56f361 | 1542 | } |
74549846 RS |
1543 | |
1544 | if (exists) | |
078e7b4a JB |
1545 | { |
1546 | /* We succeeded; return this descriptor and filename. */ | |
1547 | if (storeptr) | |
eb191db2 | 1548 | *storeptr = string; |
5ef2a3c0 | 1549 | UNGCPRO; |
96dc0f4e | 1550 | return -2; |
74549846 RS |
1551 | } |
1552 | } | |
1553 | else | |
1554 | { | |
4b2dd274 | 1555 | const char *pfn; |
eb191db2 EZ |
1556 | |
1557 | encoded_fn = ENCODE_FILE (string); | |
42a5b22f | 1558 | pfn = SSDATA (encoded_fn); |
f68c809d | 1559 | exists = (stat (pfn, &st) == 0 && ! S_ISDIR (st.st_mode)); |
74549846 RS |
1560 | if (exists) |
1561 | { | |
1562 | /* Check that we can access or open it. */ | |
86d00812 | 1563 | if (NATNUMP (predicate)) |
d311d28c PE |
1564 | fd = (((XFASTINT (predicate) & ~INT_MAX) == 0 |
1565 | && access (pfn, XFASTINT (predicate)) == 0) | |
1566 | ? 1 : -1); | |
74549846 | 1567 | else |
eb191db2 | 1568 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1569 | |
1570 | if (fd >= 0) | |
1571 | { | |
1572 | /* We succeeded; return this descriptor and filename. */ | |
1573 | if (storeptr) | |
eb191db2 | 1574 | *storeptr = string; |
74549846 RS |
1575 | UNGCPRO; |
1576 | return fd; | |
1577 | } | |
078e7b4a JB |
1578 | } |
1579 | } | |
078e7b4a | 1580 | } |
5a6e5452 | 1581 | if (absolute) |
5ef2a3c0 | 1582 | break; |
078e7b4a JB |
1583 | } |
1584 | ||
5ef2a3c0 KH |
1585 | UNGCPRO; |
1586 | return -1; | |
078e7b4a JB |
1587 | } |
1588 | ||
1589 | \f | |
ae321d28 RS |
1590 | /* Merge the list we've accumulated of globals from the current input source |
1591 | into the load_history variable. The details depend on whether | |
b502a9a1 RS |
1592 | the source has an associated file name or not. |
1593 | ||
1594 | FILENAME is the file name that we are loading from. | |
1595 | ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */ | |
ae321d28 RS |
1596 | |
1597 | static void | |
971de7fb | 1598 | build_load_history (Lisp_Object filename, int entire) |
ae321d28 RS |
1599 | { |
1600 | register Lisp_Object tail, prev, newelt; | |
1601 | register Lisp_Object tem, tem2; | |
b502a9a1 | 1602 | register int foundit = 0; |
ae321d28 RS |
1603 | |
1604 | tail = Vload_history; | |
1605 | prev = Qnil; | |
b502a9a1 | 1606 | |
86d00812 | 1607 | while (CONSP (tail)) |
ae321d28 | 1608 | { |
86d00812 | 1609 | tem = XCAR (tail); |
ae321d28 | 1610 | |
48def666 | 1611 | /* Find the feature's previous assoc list... */ |
b502a9a1 | 1612 | if (!NILP (Fequal (filename, Fcar (tem)))) |
ae321d28 RS |
1613 | { |
1614 | foundit = 1; | |
1615 | ||
48def666 | 1616 | /* If we're loading the entire file, remove old data. */ |
b502a9a1 | 1617 | if (entire) |
86d00812 | 1618 | { |
ae321d28 | 1619 | if (NILP (prev)) |
86d00812 | 1620 | Vload_history = XCDR (tail); |
ae321d28 | 1621 | else |
86d00812 | 1622 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1623 | } |
1624 | ||
1625 | /* Otherwise, cons on new symbols that are not already members. */ | |
1626 | else | |
1627 | { | |
1628 | tem2 = Vcurrent_load_list; | |
1629 | ||
1630 | while (CONSP (tem2)) | |
1631 | { | |
86d00812 | 1632 | newelt = XCAR (tem2); |
ae321d28 | 1633 | |
d642e4f9 | 1634 | if (NILP (Fmember (newelt, tem))) |
86d00812 SM |
1635 | Fsetcar (tail, Fcons (XCAR (tem), |
1636 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1637 | |
86d00812 | 1638 | tem2 = XCDR (tem2); |
ae321d28 RS |
1639 | QUIT; |
1640 | } | |
1641 | } | |
1642 | } | |
1643 | else | |
1644 | prev = tail; | |
86d00812 | 1645 | tail = XCDR (tail); |
ae321d28 RS |
1646 | QUIT; |
1647 | } | |
1648 | ||
b502a9a1 RS |
1649 | /* If we're loading an entire file, cons the new assoc onto the |
1650 | front of load-history, the most-recently-loaded position. Also | |
1651 | do this if we didn't find an existing member for the file. */ | |
1652 | if (entire || !foundit) | |
8a1f1537 RS |
1653 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), |
1654 | Vload_history); | |
ae321d28 RS |
1655 | } |
1656 | ||
94e554db | 1657 | static Lisp_Object |
971de7fb | 1658 | readevalloop_1 (Lisp_Object old) |
94e554db RS |
1659 | { |
1660 | load_convert_to_unibyte = ! NILP (old); | |
1661 | return Qnil; | |
1662 | } | |
1663 | ||
9c97398c GM |
1664 | /* Signal an `end-of-file' error, if possible with file name |
1665 | information. */ | |
1666 | ||
1667 | static void | |
971de7fb | 1668 | end_of_file_error (void) |
9c97398c | 1669 | { |
9c97398c | 1670 | if (STRINGP (Vload_file_name)) |
336d4a9c | 1671 | xsignal1 (Qend_of_file, Vload_file_name); |
9c97398c | 1672 | |
336d4a9c | 1673 | xsignal0 (Qend_of_file); |
9c97398c GM |
1674 | } |
1675 | ||
94e554db | 1676 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af | 1677 | for this invocation. |
4c03c46d | 1678 | READFUN, if non-nil, is used instead of `read'. |
1ed7b9ae RS |
1679 | |
1680 | START, END specify region to read in current buffer (from eval-region). | |
1681 | If the input is not from a buffer, they must be nil. */ | |
94e554db | 1682 | |
078e7b4a | 1683 | static void |
dd4c5104 DN |
1684 | readevalloop (Lisp_Object readcharfun, |
1685 | FILE *stream, | |
1686 | Lisp_Object sourcename, | |
dd4c5104 DN |
1687 | int printflag, |
1688 | Lisp_Object unibyte, Lisp_Object readfun, | |
1689 | Lisp_Object start, Lisp_Object end) | |
078e7b4a JB |
1690 | { |
1691 | register int c; | |
1692 | register Lisp_Object val; | |
d311d28c | 1693 | ptrdiff_t count = SPECPDL_INDEX (); |
0a37f512 | 1694 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
49cf7ff4 | 1695 | struct buffer *b = 0; |
f38952fe | 1696 | int continue_reading_p; |
b9598260 | 1697 | Lisp_Object lex_bound; |
d11db2c8 RS |
1698 | /* Nonzero if reading an entire buffer. */ |
1699 | int whole_buffer = 0; | |
1700 | /* 1 on the first time around. */ | |
1701 | int first_sexp = 1; | |
1702 | ||
1703 | if (MARKERP (readcharfun)) | |
1704 | { | |
1705 | if (NILP (start)) | |
8878319c | 1706 | start = readcharfun; |
d11db2c8 | 1707 | } |
49cf7ff4 RS |
1708 | |
1709 | if (BUFFERP (readcharfun)) | |
1710 | b = XBUFFER (readcharfun); | |
1711 | else if (MARKERP (readcharfun)) | |
1712 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a | 1713 | |
1ed7b9ae RS |
1714 | /* We assume START is nil when input is not from a buffer. */ |
1715 | if (! NILP (start) && !b) | |
1716 | abort (); | |
1717 | ||
0a37f512 | 1718 | specbind (Qstandard_input, readcharfun); /* GCPROs readcharfun. */ |
8a1f1537 | 1719 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1720 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1721 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1722 | |
b9598260 SM |
1723 | /* If lexical binding is active (either because it was specified in |
1724 | the file's header, or via a buffer-local variable), create an empty | |
1725 | lexical environment, otherwise, turn off lexical binding. */ | |
1726 | lex_bound = find_symbol_value (Qlexical_binding); | |
f07a954e SM |
1727 | specbind (Qinternal_interpreter_environment, |
1728 | NILP (lex_bound) || EQ (lex_bound, Qunbound) | |
1729 | ? Qnil : Fcons (Qt, Qnil)); | |
b9598260 | 1730 | |
0a37f512 | 1731 | GCPRO4 (sourcename, readfun, start, end); |
ae321d28 | 1732 | |
48def666 | 1733 | /* Try to ensure sourcename is a truename, except whilst preloading. */ |
6bb6da3e | 1734 | if (NILP (Vpurify_flag) |
91fe9496 SM |
1735 | && !NILP (sourcename) && !NILP (Ffile_name_absolute_p (sourcename)) |
1736 | && !NILP (Ffboundp (Qfile_truename))) | |
6bb6da3e AM |
1737 | sourcename = call1 (Qfile_truename, sourcename) ; |
1738 | ||
ae321d28 RS |
1739 | LOADHIST_ATTACH (sourcename); |
1740 | ||
f38952fe GM |
1741 | continue_reading_p = 1; |
1742 | while (continue_reading_p) | |
078e7b4a | 1743 | { |
d311d28c | 1744 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4c03c46d | 1745 | |
4b4deea2 | 1746 | if (b != 0 && NILP (BVAR (b, name))) |
49cf7ff4 RS |
1747 | error ("Reading from killed buffer"); |
1748 | ||
4c03c46d KS |
1749 | if (!NILP (start)) |
1750 | { | |
721b7d9e | 1751 | /* Switch to the buffer we are reading from. */ |
4c03c46d | 1752 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e RS |
1753 | set_buffer_internal (b); |
1754 | ||
1755 | /* Save point in it. */ | |
4c03c46d | 1756 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e | 1757 | /* Save ZV in it. */ |
4c03c46d | 1758 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
721b7d9e RS |
1759 | /* Those get unbound after we read one expression. */ |
1760 | ||
1761 | /* Set point and ZV around stuff to be read. */ | |
4c03c46d | 1762 | Fgoto_char (start); |
d11db2c8 RS |
1763 | if (!NILP (end)) |
1764 | Fnarrow_to_region (make_number (BEGV), end); | |
1765 | ||
1766 | /* Just for cleanliness, convert END to a marker | |
1767 | if it is an integer. */ | |
1768 | if (INTEGERP (end)) | |
1769 | end = Fpoint_max_marker (); | |
4c03c46d KS |
1770 | } |
1771 | ||
d11db2c8 RS |
1772 | /* On the first cycle, we can easily test here |
1773 | whether we are reading the whole buffer. */ | |
1774 | if (b && first_sexp) | |
1775 | whole_buffer = (PT == BEG && ZV == Z); | |
1776 | ||
078e7b4a | 1777 | instream = stream; |
4c03c46d | 1778 | read_next: |
078e7b4a JB |
1779 | c = READCHAR; |
1780 | if (c == ';') | |
1781 | { | |
1782 | while ((c = READCHAR) != '\n' && c != -1); | |
4c03c46d KS |
1783 | goto read_next; |
1784 | } | |
1785 | if (c < 0) | |
1786 | { | |
1787 | unbind_to (count1, Qnil); | |
1788 | break; | |
078e7b4a | 1789 | } |
6069d957 RS |
1790 | |
1791 | /* Ignore whitespace here, so we can detect eof. */ | |
adef3de7 | 1792 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' |
ed497dd4 | 1793 | || c == 0xa0) /* NBSP */ |
4c03c46d | 1794 | goto read_next; |
078e7b4a | 1795 | |
265a9e55 | 1796 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 1797 | { |
48def666 | 1798 | val = read_list (0, readcharfun); |
078e7b4a JB |
1799 | } |
1800 | else | |
1801 | { | |
1802 | UNREAD (c); | |
4ad679f9 | 1803 | read_objects = Qnil; |
f38952fe GM |
1804 | if (!NILP (readfun)) |
1805 | { | |
1806 | val = call1 (readfun, readcharfun); | |
1807 | ||
1808 | /* If READCHARFUN has set point to ZV, we should | |
1809 | stop reading, even if the form read sets point | |
1810 | to a different value when evaluated. */ | |
1811 | if (BUFFERP (readcharfun)) | |
1812 | { | |
0902fe45 PE |
1813 | struct buffer *buf = XBUFFER (readcharfun); |
1814 | if (BUF_PT (buf) == BUF_ZV (buf)) | |
f38952fe GM |
1815 | continue_reading_p = 0; |
1816 | } | |
1817 | } | |
976350af | 1818 | else if (! NILP (Vload_read_function)) |
84a15045 | 1819 | val = call1 (Vload_read_function, readcharfun); |
976350af | 1820 | else |
abb13b09 | 1821 | val = read_internal_start (readcharfun, Qnil, Qnil); |
078e7b4a JB |
1822 | } |
1823 | ||
4c03c46d KS |
1824 | if (!NILP (start) && continue_reading_p) |
1825 | start = Fpoint_marker (); | |
d11db2c8 RS |
1826 | |
1827 | /* Restore saved point and BEGV. */ | |
4c03c46d KS |
1828 | unbind_to (count1, Qnil); |
1829 | ||
d11db2c8 | 1830 | /* Now eval what we just read. */ |
defb1411 | 1831 | val = eval_sub (val); |
f38952fe | 1832 | |
078e7b4a JB |
1833 | if (printflag) |
1834 | { | |
1835 | Vvalues = Fcons (val, Vvalues); | |
1836 | if (EQ (Vstandard_output, Qt)) | |
1837 | Fprin1 (val, Qnil); | |
1838 | else | |
1839 | Fprint (val, Qnil); | |
1840 | } | |
d11db2c8 RS |
1841 | |
1842 | first_sexp = 0; | |
078e7b4a JB |
1843 | } |
1844 | ||
8878319c | 1845 | build_load_history (sourcename, |
d11db2c8 | 1846 | stream || whole_buffer); |
b502a9a1 | 1847 | |
ae321d28 RS |
1848 | UNGCPRO; |
1849 | ||
078e7b4a JB |
1850 | unbind_to (count, Qnil); |
1851 | } | |
1852 | ||
1076254d | 1853 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 | 1854 | doc: /* Execute the current buffer as Lisp code. |
72097cd9 CY |
1855 | When called from a Lisp program (i.e., not interactively), this |
1856 | function accepts up to five optional arguments: | |
5de38842 PJ |
1857 | BUFFER is the buffer to evaluate (nil means use current buffer). |
1858 | PRINTFLAG controls printing of output: | |
72097cd9 CY |
1859 | A value of nil means discard it; anything else is stream for print. |
1860 | FILENAME specifies the file name to use for `load-history'. | |
1861 | UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this | |
1862 | invocation. | |
1863 | DO-ALLOW-PRINT, if non-nil, specifies that `print' and related | |
1864 | functions should work normally even if PRINTFLAG is nil. | |
5de38842 PJ |
1865 | |
1866 | This function preserves the position of point. */) | |
5842a27b | 1867 | (Lisp_Object buffer, Lisp_Object printflag, Lisp_Object filename, Lisp_Object unibyte, Lisp_Object do_allow_print) |
228d4b1c | 1868 | { |
d311d28c | 1869 | ptrdiff_t count = SPECPDL_INDEX (); |
228d4b1c JA |
1870 | Lisp_Object tem, buf; |
1871 | ||
9391b698 | 1872 | if (NILP (buffer)) |
228d4b1c JA |
1873 | buf = Fcurrent_buffer (); |
1874 | else | |
9391b698 | 1875 | buf = Fget_buffer (buffer); |
dfdb645c | 1876 | if (NILP (buf)) |
13febd85 | 1877 | error ("No such buffer"); |
228d4b1c | 1878 | |
1076254d | 1879 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1880 | tem = Qsymbolp; |
1881 | else | |
1882 | tem = printflag; | |
13febd85 RS |
1883 | |
1884 | if (NILP (filename)) | |
4b4deea2 | 1885 | filename = BVAR (XBUFFER (buf), filename); |
13febd85 | 1886 | |
3f39f996 | 1887 | specbind (Qeval_buffer_list, Fcons (buf, Veval_buffer_list)); |
228d4b1c JA |
1888 | specbind (Qstandard_output, tem); |
1889 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
bf1c0f27 | 1890 | BUF_TEMP_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); |
7200d79c | 1891 | specbind (Qlexical_binding, lisp_file_lexically_bound_p (buf) ? Qt : Qnil); |
defb1411 | 1892 | readevalloop (buf, 0, filename, |
4c03c46d | 1893 | !NILP (printflag), unibyte, Qnil, Qnil, Qnil); |
cb09ab7a | 1894 | unbind_to (count, Qnil); |
228d4b1c JA |
1895 | |
1896 | return Qnil; | |
1897 | } | |
1898 | ||
976350af | 1899 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1900 | doc: /* Execute the region as Lisp code. |
1901 | When called from programs, expects two arguments, | |
1902 | giving starting and ending indices in the current buffer | |
1903 | of the text to be executed. | |
1904 | Programs can pass third argument PRINTFLAG which controls output: | |
51d8b30e | 1905 | A value of nil means discard it; anything else is stream for printing it. |
5de38842 PJ |
1906 | Also the fourth argument READ-FUNCTION, if non-nil, is used |
1907 | instead of `read' to read each expression. It gets one argument | |
1908 | which is the input stream for reading characters. | |
1909 | ||
1910 | This function does not move point. */) | |
5842a27b | 1911 | (Lisp_Object start, Lisp_Object end, Lisp_Object printflag, Lisp_Object read_function) |
078e7b4a | 1912 | { |
e4769531 | 1913 | /* FIXME: Do the eval-sexp-add-defvars dance! */ |
d311d28c | 1914 | ptrdiff_t count = SPECPDL_INDEX (); |
ae321d28 RS |
1915 | Lisp_Object tem, cbuf; |
1916 | ||
1917 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1918 | |
265a9e55 | 1919 | if (NILP (printflag)) |
078e7b4a JB |
1920 | tem = Qsymbolp; |
1921 | else | |
1922 | tem = printflag; | |
1923 | specbind (Qstandard_output, tem); | |
3f39f996 | 1924 | specbind (Qeval_buffer_list, Fcons (cbuf, Veval_buffer_list)); |
078e7b4a | 1925 | |
48def666 | 1926 | /* `readevalloop' calls functions which check the type of start and end. */ |
f619ad4c | 1927 | readevalloop (cbuf, 0, BVAR (XBUFFER (cbuf), filename), |
4c03c46d KS |
1928 | !NILP (printflag), Qnil, read_function, |
1929 | start, end); | |
078e7b4a JB |
1930 | |
1931 | return unbind_to (count, Qnil); | |
1932 | } | |
1933 | ||
078e7b4a | 1934 | \f |
a7ca3326 | 1935 | DEFUN ("read", Fread, Sread, 0, 1, 0, |
5de38842 PJ |
1936 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1937 | If STREAM is nil, use the value of `standard-input' (which see). | |
1938 | STREAM or the value of `standard-input' may be: | |
1939 | a buffer (read from point and advance it) | |
1940 | a marker (read from where it points and advance it) | |
1941 | a function (call it with no arguments for each character, | |
1942 | call it with a char as argument to push a char back) | |
1943 | a string (takes text from string, starting at the beginning) | |
1944 | t (read text line using minibuffer and use it, or read from | |
1945 | standard input in batch mode). */) | |
5842a27b | 1946 | (Lisp_Object stream) |
078e7b4a | 1947 | { |
5be02dff KH |
1948 | if (NILP (stream)) |
1949 | stream = Vstandard_input; | |
1950 | if (EQ (stream, Qt)) | |
1951 | stream = Qread_char; | |
5be02dff | 1952 | if (EQ (stream, Qread_char)) |
078e7b4a | 1953 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1954 | |
abb13b09 | 1955 | return read_internal_start (stream, Qnil, Qnil); |
078e7b4a JB |
1956 | } |
1957 | ||
a7ca3326 | 1958 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, |
5de38842 PJ |
1959 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1960 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
a4824228 | 1961 | FINAL-STRING-INDEX is an integer giving the position of the next |
a239d4e9 | 1962 | remaining character in STRING. |
5de38842 PJ |
1963 | START and END optionally delimit a substring of STRING from which to read; |
1964 | they default to 0 and (length STRING) respectively. */) | |
5842a27b | 1965 | (Lisp_Object string, Lisp_Object start, Lisp_Object end) |
078e7b4a | 1966 | { |
2530ceaf | 1967 | Lisp_Object ret; |
b7826503 | 1968 | CHECK_STRING (string); |
48def666 | 1969 | /* `read_internal_start' sets `read_from_string_index'. */ |
2530ceaf | 1970 | ret = read_internal_start (string, start, end); |
5135ab39 | 1971 | return Fcons (ret, make_number (read_from_string_index)); |
abb13b09 | 1972 | } |
078e7b4a | 1973 | |
abb13b09 | 1974 | /* Function to set up the global context we need in toplevel read |
48def666 | 1975 | calls. */ |
abb13b09 | 1976 | static Lisp_Object |
971de7fb | 1977 | read_internal_start (Lisp_Object stream, Lisp_Object start, Lisp_Object end) |
48def666 | 1978 | /* `start', `end' only used when stream is a string. */ |
abb13b09 CW |
1979 | { |
1980 | Lisp_Object retval; | |
078e7b4a | 1981 | |
abb13b09 | 1982 | readchar_count = 0; |
17634846 | 1983 | new_backquote_flag = 0; |
4ad679f9 | 1984 | read_objects = Qnil; |
abb13b09 CW |
1985 | if (EQ (Vread_with_symbol_positions, Qt) |
1986 | || EQ (Vread_with_symbol_positions, stream)) | |
1987 | Vread_symbol_positions_list = Qnil; | |
1988 | ||
8f924df7 KH |
1989 | if (STRINGP (stream) |
1990 | || ((CONSP (stream) && STRINGP (XCAR (stream))))) | |
abb13b09 | 1991 | { |
d311d28c | 1992 | ptrdiff_t startval, endval; |
8f924df7 | 1993 | Lisp_Object string; |
078e7b4a | 1994 | |
8f924df7 KH |
1995 | if (STRINGP (stream)) |
1996 | string = stream; | |
1997 | else | |
1998 | string = XCAR (stream); | |
078e7b4a | 1999 | |
abb13b09 | 2000 | if (NILP (end)) |
8f924df7 | 2001 | endval = SCHARS (string); |
abb13b09 CW |
2002 | else |
2003 | { | |
2004 | CHECK_NUMBER (end); | |
d311d28c | 2005 | if (! (0 <= XINT (end) && XINT (end) <= SCHARS (string))) |
8f924df7 | 2006 | args_out_of_range (string, end); |
d311d28c | 2007 | endval = XINT (end); |
abb13b09 | 2008 | } |
17634846 | 2009 | |
abb13b09 CW |
2010 | if (NILP (start)) |
2011 | startval = 0; | |
2012 | else | |
2013 | { | |
2014 | CHECK_NUMBER (start); | |
d311d28c | 2015 | if (! (0 <= XINT (start) && XINT (start) <= endval)) |
8f924df7 | 2016 | args_out_of_range (string, start); |
d311d28c | 2017 | startval = XINT (start); |
abb13b09 CW |
2018 | } |
2019 | read_from_string_index = startval; | |
8f924df7 | 2020 | read_from_string_index_byte = string_char_to_byte (string, startval); |
abb13b09 CW |
2021 | read_from_string_limit = endval; |
2022 | } | |
177c0ea7 | 2023 | |
abb13b09 CW |
2024 | retval = read0 (stream); |
2025 | if (EQ (Vread_with_symbol_positions, Qt) | |
2026 | || EQ (Vread_with_symbol_positions, stream)) | |
2027 | Vread_symbol_positions_list = Fnreverse (Vread_symbol_positions_list); | |
2028 | return retval; | |
078e7b4a JB |
2029 | } |
2030 | \f | |
336d4a9c KS |
2031 | |
2032 | /* Signal Qinvalid_read_syntax error. | |
2033 | S is error string of length N (if > 0) */ | |
2034 | ||
2035 | static void | |
e4d29b33 | 2036 | invalid_syntax (const char *s) |
336d4a9c | 2037 | { |
e4d29b33 | 2038 | xsignal1 (Qinvalid_read_syntax, build_string (s)); |
336d4a9c KS |
2039 | } |
2040 | ||
2041 | ||
6428369f | 2042 | /* Use this for recursive reads, in contexts where internal tokens |
48def666 | 2043 | are not allowed. */ |
e28552a4 | 2044 | |
078e7b4a | 2045 | static Lisp_Object |
971de7fb | 2046 | read0 (Lisp_Object readcharfun) |
078e7b4a JB |
2047 | { |
2048 | register Lisp_Object val; | |
e28552a4 | 2049 | int c; |
078e7b4a | 2050 | |
17634846 | 2051 | val = read1 (readcharfun, &c, 0); |
336d4a9c KS |
2052 | if (!c) |
2053 | return val; | |
078e7b4a | 2054 | |
336d4a9c KS |
2055 | xsignal1 (Qinvalid_read_syntax, |
2056 | Fmake_string (make_number (1), make_number (c))); | |
078e7b4a JB |
2057 | } |
2058 | \f | |
82cb60d3 | 2059 | static ptrdiff_t read_buffer_size; |
078e7b4a JB |
2060 | static char *read_buffer; |
2061 | ||
f6f79b37 | 2062 | /* Read a \-escape sequence, assuming we already read the `\'. |
8f924df7 | 2063 | If the escape sequence forces unibyte, return eight-bit char. */ |
6f7f43d5 | 2064 | |
078e7b4a | 2065 | static int |
971de7fb | 2066 | read_escape (Lisp_Object readcharfun, int stringp) |
078e7b4a JB |
2067 | { |
2068 | register int c = READCHAR; | |
9735b9ce | 2069 | /* \u allows up to four hex digits, \U up to eight. Default to the |
48def666 | 2070 | behavior for \u, and change this value in the case that \U is seen. */ |
71b169b8 | 2071 | int unicode_hex_count = 4; |
f6f79b37 | 2072 | |
078e7b4a JB |
2073 | switch (c) |
2074 | { | |
f3849f25 | 2075 | case -1: |
da3b886d | 2076 | end_of_file_error (); |
f3849f25 | 2077 | |
078e7b4a | 2078 | case 'a': |
265a9e55 | 2079 | return '\007'; |
078e7b4a JB |
2080 | case 'b': |
2081 | return '\b'; | |
f405a585 RS |
2082 | case 'd': |
2083 | return 0177; | |
078e7b4a JB |
2084 | case 'e': |
2085 | return 033; | |
2086 | case 'f': | |
2087 | return '\f'; | |
2088 | case 'n': | |
2089 | return '\n'; | |
2090 | case 'r': | |
2091 | return '\r'; | |
2092 | case 't': | |
2093 | return '\t'; | |
2094 | case 'v': | |
2095 | return '\v'; | |
2096 | case '\n': | |
2097 | return -1; | |
e28552a4 | 2098 | case ' ': |
e7fc914b KH |
2099 | if (stringp) |
2100 | return -1; | |
2101 | return ' '; | |
078e7b4a JB |
2102 | |
2103 | case 'M': | |
2104 | c = READCHAR; | |
2105 | if (c != '-') | |
2106 | error ("Invalid escape character syntax"); | |
2107 | c = READCHAR; | |
2108 | if (c == '\\') | |
8792be66 | 2109 | c = read_escape (readcharfun, 0); |
7bd279cd | 2110 | return c | meta_modifier; |
f405a585 RS |
2111 | |
2112 | case 'S': | |
2113 | c = READCHAR; | |
2114 | if (c != '-') | |
2115 | error ("Invalid escape character syntax"); | |
2116 | c = READCHAR; | |
2117 | if (c == '\\') | |
8792be66 | 2118 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2119 | return c | shift_modifier; |
2120 | ||
2121 | case 'H': | |
2122 | c = READCHAR; | |
2123 | if (c != '-') | |
2124 | error ("Invalid escape character syntax"); | |
2125 | c = READCHAR; | |
2126 | if (c == '\\') | |
8792be66 | 2127 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2128 | return c | hyper_modifier; |
2129 | ||
2130 | case 'A': | |
2131 | c = READCHAR; | |
2132 | if (c != '-') | |
2133 | error ("Invalid escape character syntax"); | |
2134 | c = READCHAR; | |
2135 | if (c == '\\') | |
8792be66 | 2136 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2137 | return c | alt_modifier; |
2138 | ||
2139 | case 's': | |
2140 | c = READCHAR; | |
4d7528d0 | 2141 | if (stringp || c != '-') |
010b7eac RS |
2142 | { |
2143 | UNREAD (c); | |
2144 | return ' '; | |
2145 | } | |
7bd279cd RS |
2146 | c = READCHAR; |
2147 | if (c == '\\') | |
8792be66 | 2148 | c = read_escape (readcharfun, 0); |
7bd279cd | 2149 | return c | super_modifier; |
078e7b4a JB |
2150 | |
2151 | case 'C': | |
2152 | c = READCHAR; | |
2153 | if (c != '-') | |
2154 | error ("Invalid escape character syntax"); | |
2155 | case '^': | |
2156 | c = READCHAR; | |
2157 | if (c == '\\') | |
8792be66 | 2158 | c = read_escape (readcharfun, 0); |
164d590d KH |
2159 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
2160 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
2161 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
2162 | return c | ctrl_modifier; | |
f405a585 RS |
2163 | /* ASCII control chars are made from letters (both cases), |
2164 | as well as the non-letters within 0100...0137. */ | |
2165 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
2166 | return (c & (037 | ~0177)); | |
2167 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
2168 | return (c & (037 | ~0177)); | |
078e7b4a | 2169 | else |
7bd279cd | 2170 | return c | ctrl_modifier; |
078e7b4a JB |
2171 | |
2172 | case '0': | |
2173 | case '1': | |
2174 | case '2': | |
2175 | case '3': | |
2176 | case '4': | |
2177 | case '5': | |
2178 | case '6': | |
2179 | case '7': | |
2180 | /* An octal escape, as in ANSI C. */ | |
2181 | { | |
2182 | register int i = c - '0'; | |
2183 | register int count = 0; | |
2184 | while (++count < 3) | |
2185 | { | |
2186 | if ((c = READCHAR) >= '0' && c <= '7') | |
2187 | { | |
2188 | i *= 8; | |
2189 | i += c - '0'; | |
2190 | } | |
2191 | else | |
2192 | { | |
2193 | UNREAD (c); | |
2194 | break; | |
2195 | } | |
2196 | } | |
177c0ea7 | 2197 | |
8f924df7 | 2198 | if (i >= 0x80 && i < 0x100) |
8792be66 | 2199 | i = BYTE8_TO_CHAR (i); |
078e7b4a JB |
2200 | return i; |
2201 | } | |
2202 | ||
2203 | case 'x': | |
2204 | /* A hex escape, as in ANSI C. */ | |
2205 | { | |
0324f3af | 2206 | unsigned int i = 0; |
1571601b | 2207 | int count = 0; |
078e7b4a JB |
2208 | while (1) |
2209 | { | |
2210 | c = READCHAR; | |
2211 | if (c >= '0' && c <= '9') | |
2212 | { | |
2213 | i *= 16; | |
2214 | i += c - '0'; | |
2215 | } | |
2216 | else if ((c >= 'a' && c <= 'f') | |
2217 | || (c >= 'A' && c <= 'F')) | |
2218 | { | |
2219 | i *= 16; | |
2220 | if (c >= 'a' && c <= 'f') | |
2221 | i += c - 'a' + 10; | |
2222 | else | |
2223 | i += c - 'A' + 10; | |
2224 | } | |
2225 | else | |
2226 | { | |
2227 | UNREAD (c); | |
2228 | break; | |
2229 | } | |
0324f3af PE |
2230 | /* Allow hex escapes as large as ?\xfffffff, because some |
2231 | packages use them to denote characters with modifiers. */ | |
2232 | if ((CHAR_META | (CHAR_META - 1)) < i) | |
39019e54 | 2233 | error ("Hex character out of range: \\x%x...", i); |
82cb60d3 | 2234 | count += count < 3; |
078e7b4a | 2235 | } |
f6f79b37 | 2236 | |
1571601b | 2237 | if (count < 3 && i >= 0x80) |
8792be66 | 2238 | return BYTE8_TO_CHAR (i); |
078e7b4a JB |
2239 | return i; |
2240 | } | |
2241 | ||
71b169b8 EZ |
2242 | case 'U': |
2243 | /* Post-Unicode-2.0: Up to eight hex chars. */ | |
2244 | unicode_hex_count = 8; | |
2245 | case 'u': | |
2246 | ||
9735b9ce | 2247 | /* A Unicode escape. We only permit them in strings and characters, |
71b169b8 EZ |
2248 | not arbitrarily in the source code, as in some other languages. */ |
2249 | { | |
a808f22d | 2250 | unsigned int i = 0; |
71b169b8 | 2251 | int count = 0; |
71b169b8 EZ |
2252 | |
2253 | while (++count <= unicode_hex_count) | |
2254 | { | |
2255 | c = READCHAR; | |
48def666 SM |
2256 | /* `isdigit' and `isalpha' may be locale-specific, which we don't |
2257 | want. */ | |
71b169b8 EZ |
2258 | if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
2259 | else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
2260 | else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
2261 | else | |
39019e54 | 2262 | error ("Non-hex digit used for Unicode escape"); |
71b169b8 | 2263 | } |
a808f22d KH |
2264 | if (i > 0x10FFFF) |
2265 | error ("Non-Unicode character: 0x%x", i); | |
7ea7f636 | 2266 | return i; |
71b169b8 EZ |
2267 | } |
2268 | ||
078e7b4a JB |
2269 | default: |
2270 | return c; | |
2271 | } | |
2272 | } | |
2273 | ||
a108c10b PE |
2274 | /* Return the digit that CHARACTER stands for in the given BASE. |
2275 | Return -1 if CHARACTER is out of range for BASE, | |
2276 | and -2 if CHARACTER is not valid for any supported BASE. */ | |
2277 | static inline int | |
2278 | digit_to_number (int character, int base) | |
2279 | { | |
2280 | int digit; | |
2281 | ||
2282 | if ('0' <= character && character <= '9') | |
2283 | digit = character - '0'; | |
2284 | else if ('a' <= character && character <= 'z') | |
2285 | digit = character - 'a' + 10; | |
2286 | else if ('A' <= character && character <= 'Z') | |
2287 | digit = character - 'A' + 10; | |
2288 | else | |
2289 | return -2; | |
2290 | ||
2291 | return digit < base ? digit : -1; | |
2292 | } | |
2293 | ||
bf5d1a17 GM |
2294 | /* Read an integer in radix RADIX using READCHARFUN to read |
2295 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
2296 | read error is signaled . Value is the integer read. Signals an | |
2297 | error if encountering invalid read syntax or if RADIX is out of | |
2298 | range. */ | |
2299 | ||
2300 | static Lisp_Object | |
8b9ac8b4 | 2301 | read_integer (Lisp_Object readcharfun, EMACS_INT radix) |
bf5d1a17 | 2302 | { |
8b9ac8b4 PE |
2303 | /* Room for sign, leading 0, other digits, trailing null byte. |
2304 | Also, room for invalid syntax diagnostic. */ | |
2305 | char buf[max (1 + 1 + sizeof (uintmax_t) * CHAR_BIT + 1, | |
2306 | sizeof "integer, radix " + INT_STRLEN_BOUND (EMACS_INT))]; | |
a108c10b PE |
2307 | |
2308 | int valid = -1; /* 1 if valid, 0 if not, -1 if incomplete. */ | |
bf5d1a17 GM |
2309 | |
2310 | if (radix < 2 || radix > 36) | |
a108c10b | 2311 | valid = 0; |
bf5d1a17 GM |
2312 | else |
2313 | { | |
a108c10b PE |
2314 | char *p = buf; |
2315 | int c, digit; | |
bf5d1a17 GM |
2316 | |
2317 | c = READCHAR; | |
a108c10b | 2318 | if (c == '-' || c == '+') |
bf5d1a17 | 2319 | { |
a108c10b | 2320 | *p++ = c; |
bf5d1a17 | 2321 | c = READCHAR; |
bf5d1a17 | 2322 | } |
177c0ea7 | 2323 | |
a108c10b | 2324 | if (c == '0') |
bf5d1a17 | 2325 | { |
a108c10b PE |
2326 | *p++ = c; |
2327 | valid = 1; | |
bf5d1a17 | 2328 | |
a108c10b PE |
2329 | /* Ignore redundant leading zeros, so the buffer doesn't |
2330 | fill up with them. */ | |
2331 | do | |
2332 | c = READCHAR; | |
2333 | while (c == '0'); | |
2334 | } | |
2335 | ||
2336 | while (-1 <= (digit = digit_to_number (c, radix))) | |
2337 | { | |
2338 | if (digit == -1) | |
2339 | valid = 0; | |
2340 | if (valid < 0) | |
2341 | valid = 1; | |
2342 | ||
2343 | if (p < buf + sizeof buf - 1) | |
2344 | *p++ = c; | |
2345 | else | |
2346 | valid = 0; | |
bf5d1a17 | 2347 | |
bf5d1a17 GM |
2348 | c = READCHAR; |
2349 | } | |
a108c10b | 2350 | |
0a6a104b | 2351 | UNREAD (c); |
a108c10b | 2352 | *p = '\0'; |
bf5d1a17 GM |
2353 | } |
2354 | ||
a108c10b | 2355 | if (! valid) |
bf5d1a17 | 2356 | { |
8b9ac8b4 | 2357 | sprintf (buf, "integer, radix %"pI"d", radix); |
e4d29b33 | 2358 | invalid_syntax (buf); |
bf5d1a17 GM |
2359 | } |
2360 | ||
a108c10b | 2361 | return string_to_number (buf, radix, 0); |
bf5d1a17 GM |
2362 | } |
2363 | ||
2364 | ||
6428369f KH |
2365 | /* If the next token is ')' or ']' or '.', we store that character |
2366 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
2367 | zero in *PCH and we read and return one lisp object. |
2368 | ||
2369 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
2370 | ||
078e7b4a | 2371 | static Lisp_Object |
971de7fb | 2372 | read1 (register Lisp_Object readcharfun, int *pch, int first_in_list) |
078e7b4a JB |
2373 | { |
2374 | register int c; | |
3c346cc3 | 2375 | unsigned uninterned_symbol = 0; |
1202434b | 2376 | int multibyte; |
4ad679f9 | 2377 | |
6428369f | 2378 | *pch = 0; |
8792be66 | 2379 | load_each_byte = 0; |
078e7b4a JB |
2380 | |
2381 | retry: | |
2382 | ||
1202434b | 2383 | c = READCHAR_REPORT_MULTIBYTE (&multibyte); |
9c97398c GM |
2384 | if (c < 0) |
2385 | end_of_file_error (); | |
078e7b4a JB |
2386 | |
2387 | switch (c) | |
2388 | { | |
2389 | case '(': | |
2390 | return read_list (0, readcharfun); | |
2391 | ||
2392 | case '[': | |
c15cfd1f | 2393 | return read_vector (readcharfun, 0); |
078e7b4a JB |
2394 | |
2395 | case ')': | |
2396 | case ']': | |
078e7b4a | 2397 | { |
6428369f KH |
2398 | *pch = c; |
2399 | return Qnil; | |
078e7b4a JB |
2400 | } |
2401 | ||
2402 | case '#': | |
200f684e | 2403 | c = READCHAR; |
f19a0f5b TZ |
2404 | if (c == 's') |
2405 | { | |
2406 | c = READCHAR; | |
2407 | if (c == '(') | |
2408 | { | |
2409 | /* Accept extended format for hashtables (extensible to | |
2410 | other types), e.g. | |
48def666 | 2411 | #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */ |
f19a0f5b TZ |
2412 | Lisp_Object tmp = read_list (0, readcharfun); |
2413 | Lisp_Object head = CAR_SAFE (tmp); | |
2414 | Lisp_Object data = Qnil; | |
2415 | Lisp_Object val = Qnil; | |
2416 | /* The size is 2 * number of allowed keywords to | |
48def666 | 2417 | make-hash-table. */ |
9735b9ce | 2418 | Lisp_Object params[10]; |
f19a0f5b TZ |
2419 | Lisp_Object ht; |
2420 | Lisp_Object key = Qnil; | |
2421 | int param_count = 0; | |
9735b9ce | 2422 | |
f19a0f5b TZ |
2423 | if (!EQ (head, Qhash_table)) |
2424 | error ("Invalid extended read marker at head of #s list " | |
2425 | "(only hash-table allowed)"); | |
9735b9ce | 2426 | |
f19a0f5b TZ |
2427 | tmp = CDR_SAFE (tmp); |
2428 | ||
48def666 | 2429 | /* This is repetitive but fast and simple. */ |
f19a0f5b | 2430 | params[param_count] = QCsize; |
48def666 | 2431 | params[param_count + 1] = Fplist_get (tmp, Qsize); |
5721b4ed AS |
2432 | if (!NILP (params[param_count + 1])) |
2433 | param_count += 2; | |
f19a0f5b TZ |
2434 | |
2435 | params[param_count] = QCtest; | |
48def666 | 2436 | params[param_count + 1] = Fplist_get (tmp, Qtest); |
5721b4ed AS |
2437 | if (!NILP (params[param_count + 1])) |
2438 | param_count += 2; | |
f19a0f5b TZ |
2439 | |
2440 | params[param_count] = QCweakness; | |
48def666 | 2441 | params[param_count + 1] = Fplist_get (tmp, Qweakness); |
5721b4ed AS |
2442 | if (!NILP (params[param_count + 1])) |
2443 | param_count += 2; | |
f19a0f5b TZ |
2444 | |
2445 | params[param_count] = QCrehash_size; | |
48def666 | 2446 | params[param_count + 1] = Fplist_get (tmp, Qrehash_size); |
5721b4ed AS |
2447 | if (!NILP (params[param_count + 1])) |
2448 | param_count += 2; | |
f19a0f5b TZ |
2449 | |
2450 | params[param_count] = QCrehash_threshold; | |
48def666 | 2451 | params[param_count + 1] = Fplist_get (tmp, Qrehash_threshold); |
5721b4ed AS |
2452 | if (!NILP (params[param_count + 1])) |
2453 | param_count += 2; | |
f19a0f5b | 2454 | |
48def666 | 2455 | /* This is the hashtable data. */ |
f19a0f5b TZ |
2456 | data = Fplist_get (tmp, Qdata); |
2457 | ||
48def666 | 2458 | /* Now use params to make a new hashtable and fill it. */ |
f19a0f5b | 2459 | ht = Fmake_hash_table (param_count, params); |
9735b9ce | 2460 | |
f19a0f5b TZ |
2461 | while (CONSP (data)) |
2462 | { | |
2463 | key = XCAR (data); | |
2464 | data = XCDR (data); | |
2465 | if (!CONSP (data)) | |
2466 | error ("Odd number of elements in hashtable data"); | |
2467 | val = XCAR (data); | |
2468 | data = XCDR (data); | |
2469 | Fputhash (key, val, ht); | |
2470 | } | |
9735b9ce | 2471 | |
f19a0f5b TZ |
2472 | return ht; |
2473 | } | |
5721b4ed | 2474 | UNREAD (c); |
e4d29b33 | 2475 | invalid_syntax ("#"); |
f19a0f5b | 2476 | } |
c2390933 RS |
2477 | if (c == '^') |
2478 | { | |
2479 | c = READCHAR; | |
2480 | if (c == '[') | |
2481 | { | |
2482 | Lisp_Object tmp; | |
c15cfd1f | 2483 | tmp = read_vector (readcharfun, 0); |
77b37c05 | 2484 | if (ASIZE (tmp) < CHAR_TABLE_STANDARD_SLOTS) |
c2390933 | 2485 | error ("Invalid size char-table"); |
985773c9 | 2486 | XSETPVECTYPE (XVECTOR (tmp), PVEC_CHAR_TABLE); |
c2390933 RS |
2487 | return tmp; |
2488 | } | |
3701b5de KH |
2489 | else if (c == '^') |
2490 | { | |
2491 | c = READCHAR; | |
2492 | if (c == '[') | |
2493 | { | |
2494 | Lisp_Object tmp; | |
d311d28c PE |
2495 | int depth; |
2496 | ptrdiff_t size; | |
8f924df7 | 2497 | |
c15cfd1f | 2498 | tmp = read_vector (readcharfun, 0); |
6efdadfd PE |
2499 | size = ASIZE (tmp); |
2500 | if (size == 0) | |
2501 | error ("Invalid size char-table"); | |
d311d28c | 2502 | if (! RANGED_INTEGERP (1, AREF (tmp, 0), 3)) |
1571601b KH |
2503 | error ("Invalid depth in char-table"); |
2504 | depth = XINT (AREF (tmp, 0)); | |
6efdadfd | 2505 | if (chartab_size[depth] != size - 2) |
3701b5de | 2506 | error ("Invalid size char-table"); |
985773c9 | 2507 | XSETPVECTYPE (XVECTOR (tmp), PVEC_SUB_CHAR_TABLE); |
3701b5de KH |
2508 | return tmp; |
2509 | } | |
e4d29b33 | 2510 | invalid_syntax ("#^^"); |
3701b5de | 2511 | } |
e4d29b33 | 2512 | invalid_syntax ("#^"); |
c2390933 RS |
2513 | } |
2514 | if (c == '&') | |
2515 | { | |
2516 | Lisp_Object length; | |
2517 | length = read1 (readcharfun, pch, first_in_list); | |
2518 | c = READCHAR; | |
2519 | if (c == '"') | |
2520 | { | |
2521 | Lisp_Object tmp, val; | |
82cb60d3 | 2522 | EMACS_INT size_in_chars |
d1ca81d9 AS |
2523 | = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2524 | / BOOL_VECTOR_BITS_PER_CHAR); | |
c2390933 RS |
2525 | |
2526 | UNREAD (c); | |
2527 | tmp = read1 (readcharfun, pch, first_in_list); | |
8792be66 | 2528 | if (STRING_MULTIBYTE (tmp) |
8f924df7 | 2529 | || (size_in_chars != SCHARS (tmp) |
8792be66 KH |
2530 | /* We used to print 1 char too many |
2531 | when the number of bits was a multiple of 8. | |
2532 | Accept such input in case it came from an old | |
2533 | version. */ | |
2534 | && ! (XFASTINT (length) | |
327719ee | 2535 | == (SCHARS (tmp) - 1) * BOOL_VECTOR_BITS_PER_CHAR))) |
e4d29b33 | 2536 | invalid_syntax ("#&..."); |
177c0ea7 | 2537 | |
c2390933 | 2538 | val = Fmake_bool_vector (length, Qnil); |
72af86bd | 2539 | memcpy (XBOOL_VECTOR (val)->data, SDATA (tmp), size_in_chars); |
67d3b149 | 2540 | /* Clear the extraneous bits in the last byte. */ |
d1ca81d9 | 2541 | if (XINT (length) != size_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
67d3b149 | 2542 | XBOOL_VECTOR (val)->data[size_in_chars - 1] |
d1ca81d9 | 2543 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
c2390933 RS |
2544 | return val; |
2545 | } | |
e4d29b33 | 2546 | invalid_syntax ("#&..."); |
c2390933 | 2547 | } |
200f684e | 2548 | if (c == '[') |
876c194c SM |
2549 | { |
2550 | /* Accept compiled functions at read-time so that we don't have to | |
2551 | build them using function calls. */ | |
2552 | Lisp_Object tmp; | |
2553 | tmp = read_vector (readcharfun, 1); | |
77b37c05 | 2554 | return Fmake_byte_code (ASIZE (tmp), |
876c194c SM |
2555 | XVECTOR (tmp)->contents); |
2556 | } | |
748ef62f RS |
2557 | if (c == '(') |
2558 | { | |
2559 | Lisp_Object tmp; | |
2560 | struct gcpro gcpro1; | |
e28552a4 | 2561 | int ch; |
748ef62f RS |
2562 | |
2563 | /* Read the string itself. */ | |
17634846 | 2564 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 2565 | if (ch != 0 || !STRINGP (tmp)) |
e4d29b33 | 2566 | invalid_syntax ("#"); |
748ef62f RS |
2567 | GCPRO1 (tmp); |
2568 | /* Read the intervals and their properties. */ | |
2569 | while (1) | |
2570 | { | |
2571 | Lisp_Object beg, end, plist; | |
2572 | ||
17634846 | 2573 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 2574 | end = plist = Qnil; |
6428369f KH |
2575 | if (ch == ')') |
2576 | break; | |
2577 | if (ch == 0) | |
17634846 | 2578 | end = read1 (readcharfun, &ch, 0); |
6428369f | 2579 | if (ch == 0) |
17634846 | 2580 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 2581 | if (ch) |
e4d29b33 | 2582 | invalid_syntax ("Invalid string property list"); |
748ef62f RS |
2583 | Fset_text_properties (beg, end, plist, tmp); |
2584 | } | |
2585 | UNGCPRO; | |
2586 | return tmp; | |
2587 | } | |
177c0ea7 | 2588 | |
20ea2964 RS |
2589 | /* #@NUMBER is used to skip NUMBER following characters. |
2590 | That's used in .elc files to skip over doc strings | |
2591 | and function definitions. */ | |
2592 | if (c == '@') | |
2593 | { | |
bfbbd7e7 PE |
2594 | enum { extra = 100 }; |
2595 | ptrdiff_t i, nskip = 0; | |
20ea2964 | 2596 | |
8792be66 | 2597 | load_each_byte = 1; |
20ea2964 RS |
2598 | /* Read a decimal integer. */ |
2599 | while ((c = READCHAR) >= 0 | |
2600 | && c >= '0' && c <= '9') | |
2601 | { | |
bfbbd7e7 PE |
2602 | if ((STRING_BYTES_BOUND - extra) / 10 <= nskip) |
2603 | string_overflow (); | |
20ea2964 RS |
2604 | nskip *= 10; |
2605 | nskip += c - '0'; | |
2606 | } | |
0a6a104b | 2607 | UNREAD (c); |
177c0ea7 | 2608 | |
8792be66 KH |
2609 | if (load_force_doc_strings |
2610 | && (EQ (readcharfun, Qget_file_char) | |
2611 | || EQ (readcharfun, Qget_emacs_mule_file_char))) | |
b2a30870 RS |
2612 | { |
2613 | /* If we are supposed to force doc strings into core right now, | |
2614 | record the last string that we skipped, | |
2615 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2616 | |
2617 | /* But first exchange saved_doc_string | |
2618 | with prev_saved_doc_string, so we save two strings. */ | |
2619 | { | |
2620 | char *temp = saved_doc_string; | |
bfbbd7e7 | 2621 | ptrdiff_t temp_size = saved_doc_string_size; |
68c45bf0 | 2622 | file_offset temp_pos = saved_doc_string_position; |
bfbbd7e7 | 2623 | ptrdiff_t temp_len = saved_doc_string_length; |
c15cfd1f RS |
2624 | |
2625 | saved_doc_string = prev_saved_doc_string; | |
2626 | saved_doc_string_size = prev_saved_doc_string_size; | |
2627 | saved_doc_string_position = prev_saved_doc_string_position; | |
2628 | saved_doc_string_length = prev_saved_doc_string_length; | |
2629 | ||
2630 | prev_saved_doc_string = temp; | |
2631 | prev_saved_doc_string_size = temp_size; | |
2632 | prev_saved_doc_string_position = temp_pos; | |
2633 | prev_saved_doc_string_length = temp_len; | |
2634 | } | |
2635 | ||
b2a30870 RS |
2636 | if (saved_doc_string_size == 0) |
2637 | { | |
37d0112b | 2638 | saved_doc_string = (char *) xmalloc (nskip + extra); |
bfbbd7e7 | 2639 | saved_doc_string_size = nskip + extra; |
b2a30870 RS |
2640 | } |
2641 | if (nskip > saved_doc_string_size) | |
2642 | { | |
11938f10 | 2643 | saved_doc_string = (char *) xrealloc (saved_doc_string, |
37d0112b PE |
2644 | nskip + extra); |
2645 | saved_doc_string_size = nskip + extra; | |
b2a30870 RS |
2646 | } |
2647 | ||
68c45bf0 | 2648 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2649 | |
2650 | /* Copy that many characters into saved_doc_string. */ | |
2651 | for (i = 0; i < nskip && c >= 0; i++) | |
2652 | saved_doc_string[i] = c = READCHAR; | |
2653 | ||
2654 | saved_doc_string_length = i; | |
2655 | } | |
2656 | else | |
b2a30870 RS |
2657 | { |
2658 | /* Skip that many characters. */ | |
2659 | for (i = 0; i < nskip && c >= 0; i++) | |
2660 | c = READCHAR; | |
2661 | } | |
d49f0c1a | 2662 | |
8792be66 | 2663 | load_each_byte = 0; |
20ea2964 RS |
2664 | goto retry; |
2665 | } | |
e2518d02 RS |
2666 | if (c == '!') |
2667 | { | |
2668 | /* #! appears at the beginning of an executable file. | |
2669 | Skip the first line. */ | |
225c7a07 | 2670 | while (c != '\n' && c >= 0) |
e2518d02 RS |
2671 | c = READCHAR; |
2672 | goto retry; | |
2673 | } | |
20ea2964 RS |
2674 | if (c == '$') |
2675 | return Vload_file_name; | |
2b6cae0c RS |
2676 | if (c == '\'') |
2677 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2678 | /* #:foo is the uninterned symbol named foo. */ |
2679 | if (c == ':') | |
2680 | { | |
2681 | uninterned_symbol = 1; | |
2682 | c = READCHAR; | |
52968808 | 2683 | if (!(c > 040 |
ed497dd4 | 2684 | && c != 0xa0 /* NBSP */ |
52968808 | 2685 | && (c >= 0200 |
0a6a104b | 2686 | || strchr ("\"';()[]#`,", c) == NULL))) |
52968808 AS |
2687 | { |
2688 | /* No symbol character follows, this is the empty | |
2689 | symbol. */ | |
0a6a104b | 2690 | UNREAD (c); |
52968808 AS |
2691 | return Fmake_symbol (build_string ("")); |
2692 | } | |
2693 | goto read_symbol; | |
4ad679f9 | 2694 | } |
9a79b20c AS |
2695 | /* ## is the empty symbol. */ |
2696 | if (c == '#') | |
2697 | return Fintern (build_string (""), Qnil); | |
4ad679f9 EN |
2698 | /* Reader forms that can reuse previously read objects. */ |
2699 | if (c >= '0' && c <= '9') | |
2700 | { | |
8b9ac8b4 | 2701 | EMACS_INT n = 0; |
4ad679f9 | 2702 | Lisp_Object tem; |
2b6cae0c | 2703 | |
4ad679f9 EN |
2704 | /* Read a non-negative integer. */ |
2705 | while (c >= '0' && c <= '9') | |
2706 | { | |
8b9ac8b4 PE |
2707 | if (MOST_POSITIVE_FIXNUM / 10 < n |
2708 | || MOST_POSITIVE_FIXNUM < n * 10 + c - '0') | |
2709 | n = MOST_POSITIVE_FIXNUM + 1; | |
2710 | else | |
2711 | n = n * 10 + c - '0'; | |
4ad679f9 EN |
2712 | c = READCHAR; |
2713 | } | |
8b9ac8b4 PE |
2714 | |
2715 | if (n <= MOST_POSITIVE_FIXNUM) | |
4ad679f9 | 2716 | { |
8b9ac8b4 PE |
2717 | if (c == 'r' || c == 'R') |
2718 | return read_integer (readcharfun, n); | |
9e062b6c | 2719 | |
8b9ac8b4 PE |
2720 | if (! NILP (Vread_circle)) |
2721 | { | |
2722 | /* #n=object returns object, but associates it with | |
2723 | n for #n#. */ | |
2724 | if (c == '=') | |
2725 | { | |
48def666 | 2726 | /* Make a placeholder for #n# to use temporarily. */ |
8b9ac8b4 PE |
2727 | Lisp_Object placeholder; |
2728 | Lisp_Object cell; | |
9e062b6c | 2729 | |
8b9ac8b4 PE |
2730 | placeholder = Fcons (Qnil, Qnil); |
2731 | cell = Fcons (make_number (n), placeholder); | |
2732 | read_objects = Fcons (cell, read_objects); | |
9e062b6c | 2733 | |
48def666 | 2734 | /* Read the object itself. */ |
8b9ac8b4 | 2735 | tem = read0 (readcharfun); |
9e062b6c | 2736 | |
48def666 | 2737 | /* Now put it everywhere the placeholder was... */ |
8b9ac8b4 | 2738 | substitute_object_in_subtree (tem, placeholder); |
177c0ea7 | 2739 | |
8b9ac8b4 PE |
2740 | /* ...and #n# will use the real value from now on. */ |
2741 | Fsetcdr (cell, tem); | |
177c0ea7 | 2742 | |
8b9ac8b4 PE |
2743 | return tem; |
2744 | } | |
2745 | ||
2746 | /* #n# returns a previously read object. */ | |
2747 | if (c == '#') | |
2748 | { | |
2749 | tem = Fassq (make_number (n), read_objects); | |
2750 | if (CONSP (tem)) | |
2751 | return XCDR (tem); | |
2752 | } | |
2753 | } | |
2754 | } | |
4ad679f9 EN |
2755 | /* Fall through to error message. */ |
2756 | } | |
bf5d1a17 GM |
2757 | else if (c == 'x' || c == 'X') |
2758 | return read_integer (readcharfun, 16); | |
2759 | else if (c == 'o' || c == 'O') | |
2760 | return read_integer (readcharfun, 8); | |
2761 | else if (c == 'b' || c == 'B') | |
2762 | return read_integer (readcharfun, 2); | |
20ea2964 | 2763 | |
200f684e | 2764 | UNREAD (c); |
e4d29b33 | 2765 | invalid_syntax ("#"); |
078e7b4a JB |
2766 | |
2767 | case ';': | |
2768 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2769 | goto retry; | |
2770 | ||
2771 | case '\'': | |
2772 | { | |
2773 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2774 | } | |
2775 | ||
17634846 | 2776 | case '`': |
9a39b306 TO |
2777 | { |
2778 | int next_char = READCHAR; | |
2779 | UNREAD (next_char); | |
2780 | /* Transition from old-style to new-style: | |
2781 | If we see "(`" it used to mean old-style, which usually works | |
2782 | fine because ` should almost never appear in such a position | |
2783 | for new-style. But occasionally we need "(`" to mean new | |
2784 | style, so we try to distinguish the two by the fact that we | |
2785 | can either write "( `foo" or "(` foo", where the first | |
2786 | intends to use new-style whereas the second intends to use | |
2787 | old-style. For Emacs-25, we should completely remove this | |
2788 | first_in_list exception (old-style can still be obtained via | |
2789 | "(\`" anyway). */ | |
bba3e508 | 2790 | if (!new_backquote_flag && first_in_list && next_char == ' ') |
9a39b306 TO |
2791 | { |
2792 | Vold_style_backquotes = Qt; | |
2793 | goto default_label; | |
2794 | } | |
2795 | else | |
2796 | { | |
2797 | Lisp_Object value; | |
17634846 | 2798 | |
9a39b306 TO |
2799 | new_backquote_flag++; |
2800 | value = read0 (readcharfun); | |
2801 | new_backquote_flag--; | |
17634846 | 2802 | |
9a39b306 TO |
2803 | return Fcons (Qbackquote, Fcons (value, Qnil)); |
2804 | } | |
2805 | } | |
17634846 | 2806 | case ',': |
bba3e508 SM |
2807 | { |
2808 | int next_char = READCHAR; | |
2809 | UNREAD (next_char); | |
2810 | /* Transition from old-style to new-style: | |
2811 | It used to be impossible to have a new-style , other than within | |
2812 | a new-style `. This is sufficient when ` and , are used in the | |
2813 | normal way, but ` and , can also appear in args to macros that | |
2814 | will not interpret them in the usual way, in which case , may be | |
2815 | used without any ` anywhere near. | |
2816 | So we now use the same heuristic as for backquote: old-style | |
2817 | unquotes are only recognized when first on a list, and when | |
2818 | followed by a space. | |
333f9019 | 2819 | Because it's more difficult to peek 2 chars ahead, a new-style |
bba3e508 SM |
2820 | ,@ can still not be used outside of a `, unless it's in the middle |
2821 | of a list. */ | |
2822 | if (new_backquote_flag | |
2823 | || !first_in_list | |
2824 | || (next_char != ' ' && next_char != '@')) | |
2825 | { | |
2826 | Lisp_Object comma_type = Qnil; | |
2827 | Lisp_Object value; | |
2828 | int ch = READCHAR; | |
17634846 | 2829 | |
bba3e508 SM |
2830 | if (ch == '@') |
2831 | comma_type = Qcomma_at; | |
2832 | else if (ch == '.') | |
2833 | comma_type = Qcomma_dot; | |
2834 | else | |
2835 | { | |
2836 | if (ch >= 0) UNREAD (ch); | |
2837 | comma_type = Qcomma; | |
2838 | } | |
17634846 | 2839 | |
bba3e508 SM |
2840 | value = read0 (readcharfun); |
2841 | return Fcons (comma_type, Fcons (value, Qnil)); | |
2842 | } | |
2843 | else | |
2844 | { | |
2845 | Vold_style_backquotes = Qt; | |
2846 | goto default_label; | |
2847 | } | |
2848 | } | |
078e7b4a JB |
2849 | case '?': |
2850 | { | |
8792be66 | 2851 | int modifiers; |
df9c2be7 KS |
2852 | int next_char; |
2853 | int ok; | |
f6f79b37 | 2854 | |
078e7b4a | 2855 | c = READCHAR; |
9c97398c GM |
2856 | if (c < 0) |
2857 | end_of_file_error (); | |
078e7b4a | 2858 | |
b9284371 KS |
2859 | /* Accept `single space' syntax like (list ? x) where the |
2860 | whitespace character is SPC or TAB. | |
2861 | Other literal whitespace like NL, CR, and FF are not accepted, | |
2862 | as there are well-established escape sequences for these. */ | |
2863 | if (c == ' ' || c == '\t') | |
2864 | return make_number (c); | |
2865 | ||
078e7b4a | 2866 | if (c == '\\') |
8792be66 KH |
2867 | c = read_escape (readcharfun, 0); |
2868 | modifiers = c & CHAR_MODIFIER_MASK; | |
2869 | c &= ~CHAR_MODIFIER_MASK; | |
2870 | if (CHAR_BYTE8_P (c)) | |
2871 | c = CHAR_TO_BYTE8 (c); | |
2872 | c |= modifiers; | |
078e7b4a | 2873 | |
df9c2be7 | 2874 | next_char = READCHAR; |
bba3e508 SM |
2875 | ok = (next_char <= 040 |
2876 | || (next_char < 0200 | |
0a6a104b | 2877 | && strchr ("\"';()[]#?`,.", next_char) != NULL)); |
df9c2be7 | 2878 | UNREAD (next_char); |
336d4a9c KS |
2879 | if (ok) |
2880 | return make_number (c); | |
37cd4238 | 2881 | |
e4d29b33 | 2882 | invalid_syntax ("?"); |
078e7b4a JB |
2883 | } |
2884 | ||
00a9a935 | 2885 | case '"': |
078e7b4a | 2886 | { |
a742d646 GM |
2887 | char *p = read_buffer; |
2888 | char *end = read_buffer + read_buffer_size; | |
0902fe45 | 2889 | register int ch; |
1571601b KH |
2890 | /* Nonzero if we saw an escape sequence specifying |
2891 | a multibyte character. */ | |
e7fc914b | 2892 | int force_multibyte = 0; |
1571601b | 2893 | /* Nonzero if we saw an escape sequence specifying |
e7fc914b KH |
2894 | a single-byte character. */ |
2895 | int force_singlebyte = 0; | |
078e7b4a | 2896 | int cancel = 0; |
82cb60d3 | 2897 | ptrdiff_t nchars = 0; |
078e7b4a | 2898 | |
0902fe45 PE |
2899 | while ((ch = READCHAR) >= 0 |
2900 | && ch != '\"') | |
078e7b4a | 2901 | { |
449fea39 | 2902 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2903 | { |
82cb60d3 | 2904 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
2905 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
2906 | memory_full (SIZE_MAX); | |
5d65df0d | 2907 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
2908 | read_buffer_size * 2); |
2909 | read_buffer_size *= 2; | |
5d65df0d | 2910 | p = read_buffer + offset; |
078e7b4a JB |
2911 | end = read_buffer + read_buffer_size; |
2912 | } | |
bed23cb2 | 2913 | |
0902fe45 | 2914 | if (ch == '\\') |
03e88613 | 2915 | { |
1571601b | 2916 | int modifiers; |
f6f79b37 | 2917 | |
0902fe45 | 2918 | ch = read_escape (readcharfun, 1); |
bed23cb2 | 2919 | |
48def666 | 2920 | /* CH is -1 if \ newline has just been seen. */ |
0902fe45 | 2921 | if (ch == -1) |
03e88613 | 2922 | { |
bed23cb2 RS |
2923 | if (p == read_buffer) |
2924 | cancel = 1; | |
03e88613 RS |
2925 | continue; |
2926 | } | |
bed23cb2 | 2927 | |
0902fe45 PE |
2928 | modifiers = ch & CHAR_MODIFIER_MASK; |
2929 | ch = ch & ~CHAR_MODIFIER_MASK; | |
1571601b | 2930 | |
0902fe45 | 2931 | if (CHAR_BYTE8_P (ch)) |
e7fc914b | 2932 | force_singlebyte = 1; |
0902fe45 | 2933 | else if (! ASCII_CHAR_P (ch)) |
f6f79b37 | 2934 | force_multibyte = 1; |
48def666 | 2935 | else /* I.e. ASCII_CHAR_P (ch). */ |
1571601b KH |
2936 | { |
2937 | /* Allow `\C- ' and `\C-?'. */ | |
2938 | if (modifiers == CHAR_CTL) | |
2939 | { | |
0902fe45 PE |
2940 | if (ch == ' ') |
2941 | ch = 0, modifiers = 0; | |
2942 | else if (ch == '?') | |
2943 | ch = 127, modifiers = 0; | |
1571601b KH |
2944 | } |
2945 | if (modifiers & CHAR_SHIFT) | |
2946 | { | |
2947 | /* Shift modifier is valid only with [A-Za-z]. */ | |
0902fe45 | 2948 | if (ch >= 'A' && ch <= 'Z') |
1571601b | 2949 | modifiers &= ~CHAR_SHIFT; |
0902fe45 PE |
2950 | else if (ch >= 'a' && ch <= 'z') |
2951 | ch -= ('a' - 'A'), modifiers &= ~CHAR_SHIFT; | |
1571601b KH |
2952 | } |
2953 | ||
2954 | if (modifiers & CHAR_META) | |
2955 | { | |
2956 | /* Move the meta bit to the right place for a | |
2957 | string. */ | |
2958 | modifiers &= ~CHAR_META; | |
0902fe45 | 2959 | ch = BYTE8_TO_CHAR (ch | 0x80); |
1571601b KH |
2960 | force_singlebyte = 1; |
2961 | } | |
2962 | } | |
5150eeec | 2963 | |
1571601b KH |
2964 | /* Any modifiers remaining are invalid. */ |
2965 | if (modifiers) | |
2966 | error ("Invalid modifier in string"); | |
0902fe45 | 2967 | p += CHAR_STRING (ch, (unsigned char *) p); |
078e7b4a | 2968 | } |
8792be66 | 2969 | else |
5150eeec | 2970 | { |
0902fe45 PE |
2971 | p += CHAR_STRING (ch, (unsigned char *) p); |
2972 | if (CHAR_BYTE8_P (ch)) | |
988f7a0c | 2973 | force_singlebyte = 1; |
0902fe45 | 2974 | else if (! ASCII_CHAR_P (ch)) |
988f7a0c | 2975 | force_multibyte = 1; |
f943104a | 2976 | } |
5150eeec | 2977 | nchars++; |
078e7b4a | 2978 | } |
5150eeec | 2979 | |
0902fe45 | 2980 | if (ch < 0) |
9c97398c | 2981 | end_of_file_error (); |
078e7b4a JB |
2982 | |
2983 | /* If purifying, and string starts with \ newline, | |
2984 | return zero instead. This is for doc strings | |
08564963 | 2985 | that we are really going to find in etc/DOC.nn.nn */ |
265a9e55 | 2986 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2987 | return make_number (0); |
2988 | ||
1571601b KH |
2989 | if (force_multibyte) |
2990 | /* READ_BUFFER already contains valid multibyte forms. */ | |
5150eeec | 2991 | ; |
1571601b | 2992 | else if (force_singlebyte) |
a742d646 | 2993 | { |
4a25e32a PE |
2994 | nchars = str_as_unibyte ((unsigned char *) read_buffer, |
2995 | p - read_buffer); | |
1571601b | 2996 | p = read_buffer + nchars; |
a742d646 | 2997 | } |
e28552a4 | 2998 | else |
cef2010d PE |
2999 | { |
3000 | /* Otherwise, READ_BUFFER contains only ASCII. */ | |
3001 | } | |
e7fc914b | 3002 | |
491f16a2 | 3003 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3004 | (force_multibyte |
3005 | || (p - read_buffer != nchars))); | |
078e7b4a JB |
3006 | } |
3007 | ||
109d300c JB |
3008 | case '.': |
3009 | { | |
109d300c JB |
3010 | int next_char = READCHAR; |
3011 | UNREAD (next_char); | |
3012 | ||
035eec48 | 3013 | if (next_char <= 040 |
e613ea97 | 3014 | || (next_char < 0200 |
0a6a104b | 3015 | && strchr ("\"';([#?`,", next_char) != NULL)) |
109d300c | 3016 | { |
6428369f KH |
3017 | *pch = c; |
3018 | return Qnil; | |
109d300c JB |
3019 | } |
3020 | ||
3021 | /* Otherwise, we fall through! Note that the atom-reading loop | |
3022 | below will now loop at least once, assuring that we will not | |
3023 | try to UNREAD two characters in a row. */ | |
3024 | } | |
078e7b4a | 3025 | default: |
17634846 | 3026 | default_label: |
88852d45 | 3027 | if (c <= 040) goto retry; |
ed497dd4 | 3028 | if (c == 0xa0) /* NBSP */ |
adef3de7 | 3029 | goto retry; |
52968808 AS |
3030 | |
3031 | read_symbol: | |
078e7b4a | 3032 | { |
38404229 | 3033 | char *p = read_buffer; |
481c6336 | 3034 | int quoted = 0; |
46cfea45 | 3035 | EMACS_INT start_position = readchar_count - 1; |
078e7b4a JB |
3036 | |
3037 | { | |
38404229 | 3038 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 3039 | |
ef1b0ba7 | 3040 | do |
078e7b4a | 3041 | { |
449fea39 | 3042 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 3043 | { |
82cb60d3 | 3044 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3045 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3046 | memory_full (SIZE_MAX); | |
5d65df0d | 3047 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3048 | read_buffer_size * 2); |
3049 | read_buffer_size *= 2; | |
5d65df0d | 3050 | p = read_buffer + offset; |
078e7b4a JB |
3051 | end = read_buffer + read_buffer_size; |
3052 | } | |
177c0ea7 | 3053 | |
078e7b4a | 3054 | if (c == '\\') |
481c6336 RS |
3055 | { |
3056 | c = READCHAR; | |
4ab11c09 GM |
3057 | if (c == -1) |
3058 | end_of_file_error (); | |
481c6336 RS |
3059 | quoted = 1; |
3060 | } | |
6f7f43d5 | 3061 | |
1202434b | 3062 | if (multibyte) |
4a25e32a | 3063 | p += CHAR_STRING (c, (unsigned char *) p); |
1202434b KH |
3064 | else |
3065 | *p++ = c; | |
078e7b4a | 3066 | c = READCHAR; |
0a6a104b AS |
3067 | } |
3068 | while (c > 040 | |
ed497dd4 | 3069 | && c != 0xa0 /* NBSP */ |
0a6a104b AS |
3070 | && (c >= 0200 |
3071 | || strchr ("\"';()[]#`,", c) == NULL)); | |
078e7b4a JB |
3072 | |
3073 | if (p == end) | |
3074 | { | |
82cb60d3 | 3075 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3076 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3077 | memory_full (SIZE_MAX); | |
5d65df0d | 3078 | read_buffer = (char *) xrealloc (read_buffer, |
37d0112b PE |
3079 | read_buffer_size * 2); |
3080 | read_buffer_size *= 2; | |
5d65df0d GM |
3081 | p = read_buffer + offset; |
3082 | end = read_buffer + read_buffer_size; | |
078e7b4a JB |
3083 | } |
3084 | *p = 0; | |
0a6a104b | 3085 | UNREAD (c); |
078e7b4a JB |
3086 | } |
3087 | ||
4ad679f9 | 3088 | if (!quoted && !uninterned_symbol) |
481c6336 | 3089 | { |
452f4150 PE |
3090 | Lisp_Object result = string_to_number (read_buffer, 10, 0); |
3091 | if (! NILP (result)) | |
8b9587d7 | 3092 | return result; |
481c6336 | 3093 | } |
abb13b09 | 3094 | { |
e93abe3d | 3095 | Lisp_Object name, result; |
d311d28c PE |
3096 | ptrdiff_t nbytes = p - read_buffer; |
3097 | ptrdiff_t nchars | |
4a25e32a PE |
3098 | = (multibyte |
3099 | ? multibyte_chars_in_text ((unsigned char *) read_buffer, | |
3100 | nbytes) | |
e93abe3d KH |
3101 | : nbytes); |
3102 | ||
3103 | if (uninterned_symbol && ! NILP (Vpurify_flag)) | |
3104 | name = make_pure_string (read_buffer, nchars, nbytes, multibyte); | |
3105 | else | |
b81d40f0 | 3106 | name = make_specified_string (read_buffer, nchars, nbytes, multibyte); |
e93abe3d KH |
3107 | result = (uninterned_symbol ? Fmake_symbol (name) |
3108 | : Fintern (name, Qnil)); | |
1202434b | 3109 | |
abb13b09 CW |
3110 | if (EQ (Vread_with_symbol_positions, Qt) |
3111 | || EQ (Vread_with_symbol_positions, readcharfun)) | |
177c0ea7 | 3112 | Vread_symbol_positions_list = |
0a6a104b | 3113 | Fcons (Fcons (result, make_number (start_position)), |
abb13b09 CW |
3114 | Vread_symbol_positions_list); |
3115 | return result; | |
3116 | } | |
078e7b4a JB |
3117 | } |
3118 | } | |
3119 | } | |
3120 | \f | |
9e062b6c | 3121 | |
48def666 | 3122 | /* List of nodes we've seen during substitute_object_in_subtree. */ |
9e062b6c RS |
3123 | static Lisp_Object seen_list; |
3124 | ||
3125 | static void | |
971de7fb | 3126 | substitute_object_in_subtree (Lisp_Object object, Lisp_Object placeholder) |
9e062b6c RS |
3127 | { |
3128 | Lisp_Object check_object; | |
3129 | ||
48def666 | 3130 | /* We haven't seen any objects when we start. */ |
9e062b6c RS |
3131 | seen_list = Qnil; |
3132 | ||
48def666 | 3133 | /* Make all the substitutions. */ |
9e062b6c RS |
3134 | check_object |
3135 | = substitute_object_recurse (object, placeholder, object); | |
177c0ea7 | 3136 | |
48def666 | 3137 | /* Clear seen_list because we're done with it. */ |
9e062b6c RS |
3138 | seen_list = Qnil; |
3139 | ||
3140 | /* The returned object here is expected to always eq the | |
48def666 | 3141 | original. */ |
9e062b6c RS |
3142 | if (!EQ (check_object, object)) |
3143 | error ("Unexpected mutation error in reader"); | |
3144 | } | |
3145 | ||
48def666 | 3146 | /* Feval doesn't get called from here, so no gc protection is needed. */ |
7a3d90dc SM |
3147 | #define SUBSTITUTE(get_val, set_val) \ |
3148 | do { \ | |
3149 | Lisp_Object old_value = get_val; \ | |
3150 | Lisp_Object true_value \ | |
3151 | = substitute_object_recurse (object, placeholder, \ | |
3152 | old_value); \ | |
3153 | \ | |
3154 | if (!EQ (old_value, true_value)) \ | |
3155 | { \ | |
3156 | set_val; \ | |
3157 | } \ | |
3158 | } while (0) | |
9e062b6c RS |
3159 | |
3160 | static Lisp_Object | |
971de7fb | 3161 | substitute_object_recurse (Lisp_Object object, Lisp_Object placeholder, Lisp_Object subtree) |
9e062b6c | 3162 | { |
48def666 | 3163 | /* If we find the placeholder, return the target object. */ |
9e062b6c RS |
3164 | if (EQ (placeholder, subtree)) |
3165 | return object; | |
3166 | ||
48def666 | 3167 | /* If we've been to this node before, don't explore it again. */ |
9e062b6c RS |
3168 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) |
3169 | return subtree; | |
3170 | ||
3171 | /* If this node can be the entry point to a cycle, remember that | |
3172 | we've seen it. It can only be such an entry point if it was made | |
3173 | by #n=, which means that we can find it as a value in | |
3174 | read_objects. */ | |
3175 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
3176 | seen_list = Fcons (subtree, seen_list); | |
177c0ea7 | 3177 | |
9e062b6c RS |
3178 | /* Recurse according to subtree's type. |
3179 | Every branch must return a Lisp_Object. */ | |
3180 | switch (XTYPE (subtree)) | |
3181 | { | |
3182 | case Lisp_Vectorlike: | |
3183 | { | |
82cb60d3 | 3184 | ptrdiff_t i, length = 0; |
7a3d90dc SM |
3185 | if (BOOL_VECTOR_P (subtree)) |
3186 | return subtree; /* No sub-objects anyway. */ | |
3187 | else if (CHAR_TABLE_P (subtree) || SUB_CHAR_TABLE_P (subtree) | |
3188 | || COMPILEDP (subtree)) | |
3189 | length = ASIZE (subtree) & PSEUDOVECTOR_SIZE_MASK; | |
3190 | else if (VECTORP (subtree)) | |
3191 | length = ASIZE (subtree); | |
3192 | else | |
3193 | /* An unknown pseudovector may contain non-Lisp fields, so we | |
3194 | can't just blindly traverse all its fields. We used to call | |
04bf5b65 | 3195 | `Flength' which signaled `sequencep', so I just preserved this |
7a3d90dc SM |
3196 | behavior. */ |
3197 | wrong_type_argument (Qsequencep, subtree); | |
3198 | ||
9e062b6c | 3199 | for (i = 0; i < length; i++) |
7a3d90dc SM |
3200 | SUBSTITUTE (AREF (subtree, i), |
3201 | ASET (subtree, i, true_value)); | |
9e062b6c RS |
3202 | return subtree; |
3203 | } | |
3204 | ||
3205 | case Lisp_Cons: | |
3206 | { | |
7a3d90dc SM |
3207 | SUBSTITUTE (XCAR (subtree), |
3208 | XSETCAR (subtree, true_value)); | |
3209 | SUBSTITUTE (XCDR (subtree), | |
3210 | XSETCDR (subtree, true_value)); | |
9e062b6c RS |
3211 | return subtree; |
3212 | } | |
3213 | ||
9e062b6c RS |
3214 | case Lisp_String: |
3215 | { | |
3216 | /* Check for text properties in each interval. | |
48def666 | 3217 | substitute_in_interval contains part of the logic. */ |
9e062b6c | 3218 | |
d5db4077 | 3219 | INTERVAL root_interval = STRING_INTERVALS (subtree); |
9e062b6c | 3220 | Lisp_Object arg = Fcons (object, placeholder); |
177c0ea7 | 3221 | |
0d74b006 SM |
3222 | traverse_intervals_noorder (root_interval, |
3223 | &substitute_in_interval, arg); | |
9e062b6c RS |
3224 | |
3225 | return subtree; | |
3226 | } | |
9e062b6c | 3227 | |
48def666 | 3228 | /* Other types don't recurse any further. */ |
9e062b6c RS |
3229 | default: |
3230 | return subtree; | |
3231 | } | |
3232 | } | |
3233 | ||
3234 | /* Helper function for substitute_object_recurse. */ | |
3235 | static void | |
971de7fb | 3236 | substitute_in_interval (INTERVAL interval, Lisp_Object arg) |
9e062b6c RS |
3237 | { |
3238 | Lisp_Object object = Fcar (arg); | |
3239 | Lisp_Object placeholder = Fcdr (arg); | |
3240 | ||
9735b9ce | 3241 | SUBSTITUTE (interval->plist, interval->plist = true_value); |
9e062b6c RS |
3242 | } |
3243 | ||
3244 | \f | |
078e7b4a JB |
3245 | #define LEAD_INT 1 |
3246 | #define DOT_CHAR 2 | |
3247 | #define TRAIL_INT 4 | |
452f4150 | 3248 | #define E_EXP 16 |
078e7b4a | 3249 | |
8b9587d7 | 3250 | |
452f4150 PE |
3251 | /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has |
3252 | integer syntax and fits in a fixnum, else return the nearest float if CP has | |
3253 | either floating point or integer syntax and BASE is 10, else return nil. If | |
3254 | IGNORE_TRAILING is nonzero, consider just the longest prefix of CP that has | |
3255 | valid floating point syntax. Signal an overflow if BASE is not 10 and the | |
3256 | number has integer syntax but does not fit. */ | |
8b9587d7 PE |
3257 | |
3258 | Lisp_Object | |
452f4150 | 3259 | string_to_number (char const *string, int base, int ignore_trailing) |
078e7b4a | 3260 | { |
a8fe7202 | 3261 | int state; |
452f4150 PE |
3262 | char const *cp = string; |
3263 | int leading_digit; | |
3264 | int float_syntax = 0; | |
3265 | double value = 0; | |
d8578e58 | 3266 | |
8b9587d7 PE |
3267 | /* Compute NaN and infinities using a variable, to cope with compilers that |
3268 | think they are smarter than we are. */ | |
3269 | double zero = 0; | |
3270 | ||
3271 | /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on | |
3272 | IEEE floating point hosts, and works around a formerly-common bug where | |
3273 | atof ("-0.0") drops the sign. */ | |
3274 | int negative = *cp == '-'; | |
3275 | ||
452f4150 PE |
3276 | int signedp = negative || *cp == '+'; |
3277 | cp += signedp; | |
8b9587d7 | 3278 | |
078e7b4a | 3279 | state = 0; |
078e7b4a | 3280 | |
452f4150 PE |
3281 | leading_digit = digit_to_number (*cp, base); |
3282 | if (0 <= leading_digit) | |
078e7b4a JB |
3283 | { |
3284 | state |= LEAD_INT; | |
452f4150 PE |
3285 | do |
3286 | ++cp; | |
3287 | while (0 <= digit_to_number (*cp, base)); | |
078e7b4a JB |
3288 | } |
3289 | if (*cp == '.') | |
3290 | { | |
3291 | state |= DOT_CHAR; | |
3292 | cp++; | |
3293 | } | |
078e7b4a | 3294 | |
452f4150 | 3295 | if (base == 10) |
eb659c41 | 3296 | { |
452f4150 PE |
3297 | if ('0' <= *cp && *cp <= '9') |
3298 | { | |
3299 | state |= TRAIL_INT; | |
3300 | do | |
3301 | cp++; | |
3302 | while ('0' <= *cp && *cp <= '9'); | |
3303 | } | |
3304 | if (*cp == 'e' || *cp == 'E') | |
3305 | { | |
3306 | char const *ecp = cp; | |
3307 | cp++; | |
3308 | if (*cp == '+' || *cp == '-') | |
3309 | cp++; | |
3310 | if ('0' <= *cp && *cp <= '9') | |
3311 | { | |
3312 | state |= E_EXP; | |
3313 | do | |
3314 | cp++; | |
3315 | while ('0' <= *cp && *cp <= '9'); | |
3316 | } | |
3317 | else if (cp[-1] == '+' | |
3318 | && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') | |
3319 | { | |
3320 | state |= E_EXP; | |
3321 | cp += 3; | |
3322 | value = 1.0 / zero; | |
3323 | } | |
3324 | else if (cp[-1] == '+' | |
3325 | && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
3326 | { | |
3327 | state |= E_EXP; | |
3328 | cp += 3; | |
3329 | value = zero / zero; | |
3330 | ||
3331 | /* If that made a "negative" NaN, negate it. */ | |
3332 | { | |
3333 | int i; | |
3334 | union { double d; char c[sizeof (double)]; } | |
3335 | u_data, u_minus_zero; | |
3336 | u_data.d = value; | |
3337 | u_minus_zero.d = -0.0; | |
3338 | for (i = 0; i < sizeof (double); i++) | |
3339 | if (u_data.c[i] & u_minus_zero.c[i]) | |
3340 | { | |
3341 | value = -value; | |
3342 | break; | |
3343 | } | |
3344 | } | |
3345 | /* Now VALUE is a positive NaN. */ | |
3346 | } | |
3347 | else | |
3348 | cp = ecp; | |
3349 | } | |
3350 | ||
3351 | float_syntax = ((state & (DOT_CHAR|TRAIL_INT)) == (DOT_CHAR|TRAIL_INT) | |
3352 | || state == (LEAD_INT|E_EXP)); | |
eb659c41 | 3353 | } |
8b9587d7 | 3354 | |
452f4150 PE |
3355 | /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept |
3356 | any prefix that matches. Otherwise, the entire string must match. */ | |
3357 | if (! (ignore_trailing | |
3358 | ? ((state & LEAD_INT) != 0 || float_syntax) | |
3359 | : (!*cp && ((state & ~DOT_CHAR) == LEAD_INT || float_syntax)))) | |
3360 | return Qnil; | |
8b9587d7 | 3361 | |
d78050d6 PE |
3362 | /* If the number uses integer and not float syntax, and is in C-language |
3363 | range, use its value, preferably as a fixnum. */ | |
452f4150 PE |
3364 | if (0 <= leading_digit && ! float_syntax) |
3365 | { | |
d78050d6 PE |
3366 | uintmax_t n; |
3367 | ||
3368 | /* Fast special case for single-digit integers. This also avoids a | |
3369 | glitch when BASE is 16 and IGNORE_TRAILING is nonzero, because in that | |
3370 | case some versions of strtoumax accept numbers like "0x1" that Emacs | |
3371 | does not allow. */ | |
3372 | if (digit_to_number (string[signedp + 1], base) < 0) | |
3373 | return make_number (negative ? -leading_digit : leading_digit); | |
3374 | ||
3375 | errno = 0; | |
3376 | n = strtoumax (string + signedp, NULL, base); | |
3377 | if (errno == ERANGE) | |
452f4150 | 3378 | { |
d78050d6 PE |
3379 | /* Unfortunately there's no simple and accurate way to convert |
3380 | non-base-10 numbers that are out of C-language range. */ | |
3381 | if (base != 10) | |
f14ed477 | 3382 | xsignal1 (Qoverflow_error, build_string (string)); |
452f4150 | 3383 | } |
d78050d6 PE |
3384 | else if (n <= (negative ? -MOST_NEGATIVE_FIXNUM : MOST_POSITIVE_FIXNUM)) |
3385 | { | |
3386 | EMACS_INT signed_n = n; | |
3387 | return make_number (negative ? -signed_n : signed_n); | |
3388 | } | |
3389 | else | |
3390 | value = n; | |
452f4150 | 3391 | } |
8b9587d7 | 3392 | |
452f4150 PE |
3393 | /* Either the number uses float syntax, or it does not fit into a fixnum. |
3394 | Convert it from string to floating point, unless the value is already | |
d78050d6 PE |
3395 | known because it is an infinity, a NAN, or its absolute value fits in |
3396 | uintmax_t. */ | |
8b9587d7 | 3397 | if (! value) |
452f4150 PE |
3398 | value = atof (string + signedp); |
3399 | ||
d78050d6 | 3400 | return make_float (negative ? -value : value); |
078e7b4a | 3401 | } |
cc94f3b2 | 3402 | |
078e7b4a JB |
3403 | \f |
3404 | static Lisp_Object | |
876c194c | 3405 | read_vector (Lisp_Object readcharfun, int bytecodeflag) |
078e7b4a | 3406 | { |
82cb60d3 | 3407 | ptrdiff_t i, size; |
078e7b4a | 3408 | register Lisp_Object *ptr; |
c15cfd1f | 3409 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
3410 | register struct Lisp_Cons *otem; |
3411 | Lisp_Object len; | |
3412 | ||
3413 | tem = read_list (1, readcharfun); | |
3414 | len = Flength (tem); | |
48def666 | 3415 | vector = Fmake_vector (len, Qnil); |
078e7b4a | 3416 | |
77b37c05 | 3417 | size = ASIZE (vector); |
078e7b4a JB |
3418 | ptr = XVECTOR (vector)->contents; |
3419 | for (i = 0; i < size; i++) | |
3420 | { | |
c15cfd1f RS |
3421 | item = Fcar (tem); |
3422 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
3423 | bytecode object, the docstring containing the bytecode and | |
3424 | constants values must be treated as unibyte and passed to | |
3425 | Fread, to get the actual bytecode string and constants vector. */ | |
876c194c | 3426 | if (bytecodeflag && load_force_doc_strings) |
c15cfd1f RS |
3427 | { |
3428 | if (i == COMPILED_BYTECODE) | |
3429 | { | |
3430 | if (!STRINGP (item)) | |
6fa2b890 | 3431 | error ("Invalid byte code"); |
c15cfd1f RS |
3432 | |
3433 | /* Delay handling the bytecode slot until we know whether | |
3434 | it is lazily-loaded (we can tell by whether the | |
3435 | constants slot is nil). */ | |
3436 | ptr[COMPILED_CONSTANTS] = item; | |
3437 | item = Qnil; | |
3438 | } | |
3439 | else if (i == COMPILED_CONSTANTS) | |
3440 | { | |
3441 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
3442 | ||
3443 | if (NILP (item)) | |
3444 | { | |
3445 | /* Coerce string to unibyte (like string-as-unibyte, | |
3446 | but without generating extra garbage and | |
3447 | guaranteeing no change in the contents). */ | |
bee91904 | 3448 | STRING_SET_CHARS (bytestr, SBYTES (bytestr)); |
d5db4077 | 3449 | STRING_SET_UNIBYTE (bytestr); |
c15cfd1f | 3450 | |
8792be66 | 3451 | item = Fread (Fcons (bytestr, readcharfun)); |
c15cfd1f | 3452 | if (!CONSP (item)) |
6fa2b890 | 3453 | error ("Invalid byte code"); |
c15cfd1f RS |
3454 | |
3455 | otem = XCONS (item); | |
c1d497be KR |
3456 | bytestr = XCAR (item); |
3457 | item = XCDR (item); | |
c15cfd1f RS |
3458 | free_cons (otem); |
3459 | } | |
3460 | ||
3461 | /* Now handle the bytecode slot. */ | |
48def666 | 3462 | ptr[COMPILED_BYTECODE] = bytestr; |
c15cfd1f | 3463 | } |
8792be66 KH |
3464 | else if (i == COMPILED_DOC_STRING |
3465 | && STRINGP (item) | |
3466 | && ! STRING_MULTIBYTE (item)) | |
3467 | { | |
3468 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) | |
3469 | item = Fdecode_coding_string (item, Qemacs_mule, Qnil, Qnil); | |
3470 | else | |
3471 | item = Fstring_as_multibyte (item); | |
3472 | } | |
c15cfd1f | 3473 | } |
48def666 | 3474 | ptr[i] = item; |
078e7b4a JB |
3475 | otem = XCONS (tem); |
3476 | tem = Fcdr (tem); | |
3477 | free_cons (otem); | |
3478 | } | |
3479 | return vector; | |
3480 | } | |
177c0ea7 | 3481 | |
48def666 | 3482 | /* FLAG = 1 means check for ] to terminate rather than ) and . */ |
078e7b4a JB |
3483 | |
3484 | static Lisp_Object | |
971de7fb | 3485 | read_list (int flag, register Lisp_Object readcharfun) |
078e7b4a | 3486 | { |
078e7b4a JB |
3487 | Lisp_Object val, tail; |
3488 | register Lisp_Object elt, tem; | |
3489 | struct gcpro gcpro1, gcpro2; | |
821d417e | 3490 | /* 0 is the normal case. |
b2a30870 | 3491 | 1 means this list is a doc reference; replace it with the number 0. |
177c0ea7 | 3492 | 2 means this list is a doc reference; replace it with the doc string. */ |
821d417e | 3493 | int doc_reference = 0; |
078e7b4a | 3494 | |
17634846 RS |
3495 | /* Initialize this to 1 if we are reading a list. */ |
3496 | int first_in_list = flag <= 0; | |
3497 | ||
078e7b4a JB |
3498 | val = Qnil; |
3499 | tail = Qnil; | |
3500 | ||
3501 | while (1) | |
3502 | { | |
e28552a4 | 3503 | int ch; |
078e7b4a | 3504 | GCPRO2 (val, tail); |
17634846 | 3505 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 3506 | UNGCPRO; |
20ea2964 | 3507 | |
17634846 RS |
3508 | first_in_list = 0; |
3509 | ||
821d417e | 3510 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 3511 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 3512 | && ! NILP (elt) |
821d417e RS |
3513 | && !NILP (Vpurify_flag)) |
3514 | { | |
3515 | if (NILP (Vdoc_file_name)) | |
3516 | /* We have not yet called Snarf-documentation, so assume | |
3517 | this file is described in the DOC-MM.NN file | |
3518 | and Snarf-documentation will fill in the right value later. | |
3519 | For now, replace the whole list with 0. */ | |
3520 | doc_reference = 1; | |
3521 | else | |
3522 | /* We have already called Snarf-documentation, so make a relative | |
3523 | file name for this file, so it can be found properly | |
3524 | in the installed Lisp directory. | |
3525 | We don't use Fexpand_file_name because that would make | |
3526 | the directory absolute now. */ | |
3527 | elt = concat2 (build_string ("../lisp/"), | |
3528 | Ffile_name_nondirectory (elt)); | |
3529 | } | |
b2a30870 | 3530 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 3531 | && ! NILP (elt) |
b2a30870 RS |
3532 | && load_force_doc_strings) |
3533 | doc_reference = 2; | |
20ea2964 | 3534 | |
6428369f | 3535 | if (ch) |
078e7b4a JB |
3536 | { |
3537 | if (flag > 0) | |
3538 | { | |
6428369f | 3539 | if (ch == ']') |
078e7b4a | 3540 | return val; |
e4d29b33 | 3541 | invalid_syntax (") or . in a vector"); |
078e7b4a | 3542 | } |
6428369f | 3543 | if (ch == ')') |
078e7b4a | 3544 | return val; |
6428369f | 3545 | if (ch == '.') |
078e7b4a JB |
3546 | { |
3547 | GCPRO2 (val, tail); | |
265a9e55 | 3548 | if (!NILP (tail)) |
f5df591a | 3549 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
3550 | else |
3551 | val = read0 (readcharfun); | |
17634846 | 3552 | read1 (readcharfun, &ch, 0); |
078e7b4a | 3553 | UNGCPRO; |
6428369f | 3554 | if (ch == ')') |
821d417e RS |
3555 | { |
3556 | if (doc_reference == 1) | |
3557 | return make_number (0); | |
b2a30870 RS |
3558 | if (doc_reference == 2) |
3559 | { | |
3560 | /* Get a doc string from the file we are loading. | |
8792be66 KH |
3561 | If it's in saved_doc_string, get it from there. |
3562 | ||
3563 | Here, we don't know if the string is a | |
3564 | bytecode string or a doc string. As a | |
3565 | bytecode string must be unibyte, we always | |
3566 | return a unibyte string. If it is actually a | |
3567 | doc string, caller must make it | |
3568 | multibyte. */ | |
8f924df7 | 3569 | |
bfbbd7e7 | 3570 | EMACS_INT pos = XINT (XCDR (val)); |
c15cfd1f RS |
3571 | /* Position is negative for user variables. */ |
3572 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
3573 | if (pos >= saved_doc_string_position |
3574 | && pos < (saved_doc_string_position | |
3575 | + saved_doc_string_length)) | |
3576 | { | |
82cb60d3 PE |
3577 | ptrdiff_t start = pos - saved_doc_string_position; |
3578 | ptrdiff_t from, to; | |
b2a30870 RS |
3579 | |
3580 | /* Process quoting with ^A, | |
3581 | and find the end of the string, | |
3582 | which is marked with ^_ (037). */ | |
3583 | for (from = start, to = start; | |
3584 | saved_doc_string[from] != 037;) | |
3585 | { | |
3586 | int c = saved_doc_string[from++]; | |
3587 | if (c == 1) | |
3588 | { | |
3589 | c = saved_doc_string[from++]; | |
3590 | if (c == 1) | |
3591 | saved_doc_string[to++] = c; | |
3592 | else if (c == '0') | |
3593 | saved_doc_string[to++] = 0; | |
3594 | else if (c == '_') | |
3595 | saved_doc_string[to++] = 037; | |
3596 | } | |
3597 | else | |
3598 | saved_doc_string[to++] = c; | |
3599 | } | |
3600 | ||
8792be66 KH |
3601 | return make_unibyte_string (saved_doc_string + start, |
3602 | to - start); | |
b2a30870 | 3603 | } |
c15cfd1f RS |
3604 | /* Look in prev_saved_doc_string the same way. */ |
3605 | else if (pos >= prev_saved_doc_string_position | |
3606 | && pos < (prev_saved_doc_string_position | |
3607 | + prev_saved_doc_string_length)) | |
3608 | { | |
82cb60d3 PE |
3609 | ptrdiff_t start = |
3610 | pos - prev_saved_doc_string_position; | |
3611 | ptrdiff_t from, to; | |
c15cfd1f RS |
3612 | |
3613 | /* Process quoting with ^A, | |
3614 | and find the end of the string, | |
3615 | which is marked with ^_ (037). */ | |
3616 | for (from = start, to = start; | |
3617 | prev_saved_doc_string[from] != 037;) | |
3618 | { | |
3619 | int c = prev_saved_doc_string[from++]; | |
3620 | if (c == 1) | |
3621 | { | |
3622 | c = prev_saved_doc_string[from++]; | |
3623 | if (c == 1) | |
3624 | prev_saved_doc_string[to++] = c; | |
3625 | else if (c == '0') | |
3626 | prev_saved_doc_string[to++] = 0; | |
3627 | else if (c == '_') | |
3628 | prev_saved_doc_string[to++] = 037; | |
3629 | } | |
3630 | else | |
3631 | prev_saved_doc_string[to++] = c; | |
3632 | } | |
3633 | ||
8792be66 KH |
3634 | return make_unibyte_string (prev_saved_doc_string |
3635 | + start, | |
3636 | to - start); | |
c15cfd1f | 3637 | } |
b2a30870 | 3638 | else |
8792be66 | 3639 | return get_doc_string (val, 1, 0); |
b2a30870 RS |
3640 | } |
3641 | ||
821d417e RS |
3642 | return val; |
3643 | } | |
e4d29b33 | 3644 | invalid_syntax (". in wrong context"); |
078e7b4a | 3645 | } |
e4d29b33 | 3646 | invalid_syntax ("] in a list"); |
078e7b4a | 3647 | } |
48def666 | 3648 | tem = Fcons (elt, Qnil); |
265a9e55 | 3649 | if (!NILP (tail)) |
f5df591a | 3650 | XSETCDR (tail, tem); |
078e7b4a JB |
3651 | else |
3652 | val = tem; | |
3653 | tail = tem; | |
078e7b4a JB |
3654 | } |
3655 | } | |
3656 | \f | |
1e3890d1 | 3657 | static Lisp_Object initial_obarray; |
078e7b4a | 3658 | |
48def666 | 3659 | /* `oblookup' stores the bucket number here, for the sake of Funintern. */ |
d007f5c8 | 3660 | |
2f30ecd0 | 3661 | static size_t oblookup_last_bucket_number; |
d007f5c8 | 3662 | |
d007f5c8 RS |
3663 | /* Get an error if OBARRAY is not an obarray. |
3664 | If it is one, return it. */ | |
3665 | ||
078e7b4a | 3666 | Lisp_Object |
971de7fb | 3667 | check_obarray (Lisp_Object obarray) |
078e7b4a | 3668 | { |
77b37c05 | 3669 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a JB |
3670 | { |
3671 | /* If Vobarray is now invalid, force it to be valid. */ | |
3672 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
8878319c | 3673 | wrong_type_argument (Qvectorp, obarray); |
078e7b4a JB |
3674 | } |
3675 | return obarray; | |
3676 | } | |
3677 | ||
d007f5c8 RS |
3678 | /* Intern the C string STR: return a symbol with that name, |
3679 | interned in the current obarray. */ | |
078e7b4a JB |
3680 | |
3681 | Lisp_Object | |
971de7fb | 3682 | intern (const char *str) |
078e7b4a JB |
3683 | { |
3684 | Lisp_Object tem; | |
6e5bb2dc | 3685 | ptrdiff_t len = strlen (str); |
153a17b7 | 3686 | Lisp_Object obarray; |
078e7b4a | 3687 | |
153a17b7 | 3688 | obarray = Vobarray; |
77b37c05 | 3689 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a | 3690 | obarray = check_obarray (obarray); |
e28552a4 | 3691 | tem = oblookup (obarray, str, len, len); |
cfff016d | 3692 | if (SYMBOLP (tem)) |
078e7b4a | 3693 | return tem; |
87631ef7 | 3694 | return Fintern (make_string (str, len), obarray); |
078e7b4a | 3695 | } |
4ad679f9 | 3696 | |
5e2327cf DN |
3697 | Lisp_Object |
3698 | intern_c_string (const char *str) | |
3699 | { | |
3700 | Lisp_Object tem; | |
6e5bb2dc | 3701 | ptrdiff_t len = strlen (str); |
5e2327cf DN |
3702 | Lisp_Object obarray; |
3703 | ||
3704 | obarray = Vobarray; | |
77b37c05 | 3705 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
5e2327cf DN |
3706 | obarray = check_obarray (obarray); |
3707 | tem = oblookup (obarray, str, len, len); | |
3708 | if (SYMBOLP (tem)) | |
3709 | return tem; | |
3710 | ||
3711 | if (NILP (Vpurify_flag)) | |
3712 | /* Creating a non-pure string from a string literal not | |
3713 | implemented yet. We could just use make_string here and live | |
3714 | with the extra copy. */ | |
3715 | abort (); | |
3716 | ||
3717 | return Fintern (make_pure_c_string (str), obarray); | |
3718 | } | |
d007f5c8 | 3719 | \f |
a7ca3326 | 3720 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
3721 | doc: /* Return the canonical symbol whose name is STRING. |
3722 | If there is none, one is created by this function and returned. | |
3723 | A second optional argument specifies the obarray to use; | |
3724 | it defaults to the value of `obarray'. */) | |
5842a27b | 3725 | (Lisp_Object string, Lisp_Object obarray) |
078e7b4a JB |
3726 | { |
3727 | register Lisp_Object tem, sym, *ptr; | |
3728 | ||
265a9e55 | 3729 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3730 | obarray = check_obarray (obarray); |
3731 | ||
b7826503 | 3732 | CHECK_STRING (string); |
078e7b4a | 3733 | |
42a5b22f | 3734 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3735 | SCHARS (string), |
3736 | SBYTES (string)); | |
cfff016d | 3737 | if (!INTEGERP (tem)) |
078e7b4a JB |
3738 | return tem; |
3739 | ||
265a9e55 | 3740 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
3741 | string = Fpurecopy (string); |
3742 | sym = Fmake_symbol (string); | |
44c6c019 GM |
3743 | |
3744 | if (EQ (obarray, initial_obarray)) | |
3745 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
3746 | else | |
3747 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 3748 | |
d5db4077 | 3749 | if ((SREF (string, 0) == ':') |
a458d45d | 3750 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
3751 | { |
3752 | XSYMBOL (sym)->constant = 1; | |
ce5b453a SM |
3753 | XSYMBOL (sym)->redirect = SYMBOL_PLAINVAL; |
3754 | SET_SYMBOL_VAL (XSYMBOL (sym), sym); | |
44c6c019 | 3755 | } |
a0549832 | 3756 | |
078e7b4a | 3757 | ptr = &XVECTOR (obarray)->contents[XINT (tem)]; |
cfff016d | 3758 | if (SYMBOLP (*ptr)) |
078e7b4a JB |
3759 | XSYMBOL (sym)->next = XSYMBOL (*ptr); |
3760 | else | |
3761 | XSYMBOL (sym)->next = 0; | |
3762 | *ptr = sym; | |
3763 | return sym; | |
3764 | } | |
3765 | ||
a7ca3326 | 3766 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, |
5de38842 PJ |
3767 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3768 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3769 | symbol is searched for. | |
3770 | A second optional argument specifies the obarray to use; | |
3771 | it defaults to the value of `obarray'. */) | |
5842a27b | 3772 | (Lisp_Object name, Lisp_Object obarray) |
078e7b4a | 3773 | { |
c2d47f4b | 3774 | register Lisp_Object tem, string; |
078e7b4a | 3775 | |
265a9e55 | 3776 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3777 | obarray = check_obarray (obarray); |
3778 | ||
b55048d4 GM |
3779 | if (!SYMBOLP (name)) |
3780 | { | |
b7826503 | 3781 | CHECK_STRING (name); |
c2d47f4b | 3782 | string = name; |
b55048d4 GM |
3783 | } |
3784 | else | |
c2d47f4b | 3785 | string = SYMBOL_NAME (name); |
078e7b4a | 3786 | |
42a5b22f | 3787 | tem = oblookup (obarray, SSDATA (string), SCHARS (string), SBYTES (string)); |
b55048d4 GM |
3788 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
3789 | return Qnil; | |
3790 | else | |
078e7b4a | 3791 | return tem; |
078e7b4a | 3792 | } |
d007f5c8 | 3793 | \f |
a7ca3326 | 3794 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, |
5de38842 PJ |
3795 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3796 | The value is t if a symbol was found and deleted, nil otherwise. | |
3797 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3798 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3799 | OBARRAY defaults to the value of the variable `obarray'. */) | |
5842a27b | 3800 | (Lisp_Object name, Lisp_Object obarray) |
d007f5c8 RS |
3801 | { |
3802 | register Lisp_Object string, tem; | |
2f30ecd0 | 3803 | size_t hash; |
d007f5c8 RS |
3804 | |
3805 | if (NILP (obarray)) obarray = Vobarray; | |
3806 | obarray = check_obarray (obarray); | |
3807 | ||
3808 | if (SYMBOLP (name)) | |
d4c83cae | 3809 | string = SYMBOL_NAME (name); |
d007f5c8 RS |
3810 | else |
3811 | { | |
b7826503 | 3812 | CHECK_STRING (name); |
d007f5c8 RS |
3813 | string = name; |
3814 | } | |
3815 | ||
42a5b22f | 3816 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3817 | SCHARS (string), |
3818 | SBYTES (string)); | |
d007f5c8 RS |
3819 | if (INTEGERP (tem)) |
3820 | return Qnil; | |
3821 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3822 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3823 | return Qnil; | |
3824 | ||
8ab1650e SM |
3825 | /* There are plenty of other symbols which will screw up the Emacs |
3826 | session if we unintern them, as well as even more ways to use | |
3827 | `setq' or `fset' or whatnot to make the Emacs session | |
3828 | unusable. Let's not go down this silly road. --Stef */ | |
3829 | /* if (EQ (tem, Qnil) || EQ (tem, Qt)) | |
3830 | error ("Attempt to unintern t or nil"); */ | |
82c602f0 | 3831 | |
44c6c019 | 3832 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
ca69c42f | 3833 | |
d007f5c8 RS |
3834 | hash = oblookup_last_bucket_number; |
3835 | ||
3836 | if (EQ (XVECTOR (obarray)->contents[hash], tem)) | |
b2a30870 RS |
3837 | { |
3838 | if (XSYMBOL (tem)->next) | |
3839 | XSETSYMBOL (XVECTOR (obarray)->contents[hash], XSYMBOL (tem)->next); | |
3840 | else | |
3841 | XSETINT (XVECTOR (obarray)->contents[hash], 0); | |
3842 | } | |
d007f5c8 RS |
3843 | else |
3844 | { | |
3845 | Lisp_Object tail, following; | |
3846 | ||
3847 | for (tail = XVECTOR (obarray)->contents[hash]; | |
3848 | XSYMBOL (tail)->next; | |
3849 | tail = following) | |
3850 | { | |
3851 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3852 | if (EQ (following, tem)) | |
3853 | { | |
3854 | XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
3855 | break; | |
3856 | } | |
3857 | } | |
3858 | } | |
3859 | ||
3860 | return Qt; | |
3861 | } | |
3862 | \f | |
3863 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3864 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3865 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3866 | |
3867 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3868 | |
3869 | Lisp_Object | |
d311d28c | 3870 | oblookup (Lisp_Object obarray, register const char *ptr, ptrdiff_t size, ptrdiff_t size_byte) |
078e7b4a | 3871 | { |
2f30ecd0 PE |
3872 | size_t hash; |
3873 | size_t obsize; | |
078e7b4a JB |
3874 | register Lisp_Object tail; |
3875 | Lisp_Object bucket, tem; | |
3876 | ||
cfff016d | 3877 | if (!VECTORP (obarray) |
77b37c05 | 3878 | || (obsize = ASIZE (obarray)) == 0) |
078e7b4a JB |
3879 | { |
3880 | obarray = check_obarray (obarray); | |
77b37c05 | 3881 | obsize = ASIZE (obarray); |
078e7b4a | 3882 | } |
519418b3 RS |
3883 | /* This is sometimes needed in the middle of GC. */ |
3884 | obsize &= ~ARRAY_MARK_FLAG; | |
7c2fb837 | 3885 | hash = hash_string (ptr, size_byte) % obsize; |
078e7b4a | 3886 | bucket = XVECTOR (obarray)->contents[hash]; |
d007f5c8 | 3887 | oblookup_last_bucket_number = hash; |
8bc285a2 | 3888 | if (EQ (bucket, make_number (0))) |
078e7b4a | 3889 | ; |
cfff016d | 3890 | else if (!SYMBOLP (bucket)) |
48def666 | 3891 | error ("Bad data in guts of obarray"); /* Like CADR error message. */ |
d007f5c8 RS |
3892 | else |
3893 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3894 | { |
d5db4077 KR |
3895 | if (SBYTES (SYMBOL_NAME (tail)) == size_byte |
3896 | && SCHARS (SYMBOL_NAME (tail)) == size | |
72af86bd | 3897 | && !memcmp (SDATA (SYMBOL_NAME (tail)), ptr, size_byte)) |
078e7b4a JB |
3898 | return tail; |
3899 | else if (XSYMBOL (tail)->next == 0) | |
3900 | break; | |
3901 | } | |
1805de4f | 3902 | XSETINT (tem, hash); |
078e7b4a JB |
3903 | return tem; |
3904 | } | |
d007f5c8 | 3905 | \f |
078e7b4a | 3906 | void |
971de7fb | 3907 | map_obarray (Lisp_Object obarray, void (*fn) (Lisp_Object, Lisp_Object), Lisp_Object arg) |
078e7b4a | 3908 | { |
82cb60d3 | 3909 | ptrdiff_t i; |
078e7b4a | 3910 | register Lisp_Object tail; |
b7826503 | 3911 | CHECK_VECTOR (obarray); |
77b37c05 | 3912 | for (i = ASIZE (obarray) - 1; i >= 0; i--) |
078e7b4a JB |
3913 | { |
3914 | tail = XVECTOR (obarray)->contents[i]; | |
4f5c4403 | 3915 | if (SYMBOLP (tail)) |
078e7b4a JB |
3916 | while (1) |
3917 | { | |
3918 | (*fn) (tail, arg); | |
3919 | if (XSYMBOL (tail)->next == 0) | |
3920 | break; | |
1805de4f | 3921 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3922 | } |
3923 | } | |
3924 | } | |
3925 | ||
7d383292 | 3926 | static void |
971de7fb | 3927 | mapatoms_1 (Lisp_Object sym, Lisp_Object function) |
078e7b4a JB |
3928 | { |
3929 | call1 (function, sym); | |
3930 | } | |
3931 | ||
3932 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3933 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3934 | OBARRAY defaults to the value of `obarray'. */) | |
5842a27b | 3935 | (Lisp_Object function, Lisp_Object obarray) |
078e7b4a | 3936 | { |
265a9e55 | 3937 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3938 | obarray = check_obarray (obarray); |
3939 | ||
3940 | map_obarray (obarray, mapatoms_1, function); | |
3941 | return Qnil; | |
3942 | } | |
3943 | ||
5e88a39e | 3944 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3945 | |
3946 | void | |
971de7fb | 3947 | init_obarray (void) |
078e7b4a JB |
3948 | { |
3949 | Lisp_Object oblength; | |
37d0112b | 3950 | ptrdiff_t size = 100 + MAX_MULTIBYTE_LENGTH; |
078e7b4a | 3951 | |
baf69866 | 3952 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3953 | |
078e7b4a JB |
3954 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3955 | initial_obarray = Vobarray; | |
3956 | staticpro (&initial_obarray); | |
078e7b4a | 3957 | |
d67b4f80 | 3958 | Qunbound = Fmake_symbol (make_pure_c_string ("unbound")); |
ce5b453a SM |
3959 | /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the |
3960 | NILP (Vpurify_flag) check in intern_c_string. */ | |
3961 | Qnil = make_number (-1); Vpurify_flag = make_number (1); | |
3962 | Qnil = intern_c_string ("nil"); | |
3963 | ||
3964 | /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil, | |
53964682 | 3965 | so those two need to be fixed manually. */ |
ce5b453a | 3966 | SET_SYMBOL_VAL (XSYMBOL (Qunbound), Qunbound); |
078e7b4a | 3967 | XSYMBOL (Qunbound)->function = Qunbound; |
ce5b453a SM |
3968 | XSYMBOL (Qunbound)->plist = Qnil; |
3969 | /* XSYMBOL (Qnil)->function = Qunbound; */ | |
3970 | SET_SYMBOL_VAL (XSYMBOL (Qnil), Qnil); | |
3971 | XSYMBOL (Qnil)->constant = 1; | |
9660f5fc | 3972 | XSYMBOL (Qnil)->declared_special = 1; |
ce5b453a | 3973 | XSYMBOL (Qnil)->plist = Qnil; |
078e7b4a | 3974 | |
d67b4f80 | 3975 | Qt = intern_c_string ("t"); |
ce5b453a | 3976 | SET_SYMBOL_VAL (XSYMBOL (Qt), Qt); |
9660f5fc | 3977 | XSYMBOL (Qnil)->declared_special = 1; |
44c6c019 | 3978 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
3979 | |
3980 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
3981 | Vpurify_flag = Qt; | |
3982 | ||
cd3520a4 | 3983 | DEFSYM (Qvariable_documentation, "variable-documentation"); |
078e7b4a | 3984 | |
37d0112b PE |
3985 | read_buffer = (char *) xmalloc (size); |
3986 | read_buffer_size = size; | |
078e7b4a JB |
3987 | } |
3988 | \f | |
3989 | void | |
971de7fb | 3990 | defsubr (struct Lisp_Subr *sname) |
078e7b4a JB |
3991 | { |
3992 | Lisp_Object sym; | |
d67b4f80 | 3993 | sym = intern_c_string (sname->symbol_name); |
eab3844f | 3994 | XSETTYPED_PVECTYPE (sname, size, PVEC_SUBR); |
1805de4f | 3995 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3996 | } |
3997 | ||
48def666 | 3998 | #ifdef NOTDEF /* Use fset in subr.el now! */ |
078e7b4a | 3999 | void |
1dae0f0a | 4000 | defalias (struct Lisp_Subr *sname, char *string) |
078e7b4a JB |
4001 | { |
4002 | Lisp_Object sym; | |
4003 | sym = intern (string); | |
1805de4f | 4004 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
4005 | } |
4006 | #endif /* NOTDEF */ | |
4007 | ||
039c6cc3 | 4008 | /* Define an "integer variable"; a symbol whose value is forwarded to a |
82cb60d3 | 4009 | C variable of type EMACS_INT. Sample call (with "xx" to fool make-docfile): |
039c6cc3 | 4010 | DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */ |
078e7b4a | 4011 | void |
ce5b453a SM |
4012 | defvar_int (struct Lisp_Intfwd *i_fwd, |
4013 | const char *namestring, EMACS_INT *address) | |
078e7b4a | 4014 | { |
ce5b453a | 4015 | Lisp_Object sym; |
5e2327cf | 4016 | sym = intern_c_string (namestring); |
ce5b453a SM |
4017 | i_fwd->type = Lisp_Fwd_Int; |
4018 | i_fwd->intvar = address; | |
b9598260 | 4019 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4020 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4021 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)i_fwd); | |
078e7b4a JB |
4022 | } |
4023 | ||
f0529b5b | 4024 | /* Similar but define a variable whose value is t if address contains 1, |
0f011df0 | 4025 | nil if address contains 0. */ |
078e7b4a | 4026 | void |
ce5b453a SM |
4027 | defvar_bool (struct Lisp_Boolfwd *b_fwd, |
4028 | const char *namestring, int *address) | |
078e7b4a | 4029 | { |
ce5b453a | 4030 | Lisp_Object sym; |
5e2327cf | 4031 | sym = intern_c_string (namestring); |
ce5b453a SM |
4032 | b_fwd->type = Lisp_Fwd_Bool; |
4033 | b_fwd->boolvar = address; | |
b9598260 | 4034 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4035 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4036 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)b_fwd); | |
1ffcc3b1 | 4037 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
4038 | } |
4039 | ||
1a0f90f7 KH |
4040 | /* Similar but define a variable whose value is the Lisp Object stored |
4041 | at address. Two versions: with and without gc-marking of the C | |
4042 | variable. The nopro version is used when that variable will be | |
4043 | gc-marked for some other reason, since marking the same slot twice | |
4044 | can cause trouble with strings. */ | |
078e7b4a | 4045 | void |
ce5b453a SM |
4046 | defvar_lisp_nopro (struct Lisp_Objfwd *o_fwd, |
4047 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4048 | { |
ce5b453a | 4049 | Lisp_Object sym; |
5e2327cf | 4050 | sym = intern_c_string (namestring); |
ce5b453a SM |
4051 | o_fwd->type = Lisp_Fwd_Obj; |
4052 | o_fwd->objvar = address; | |
b9598260 | 4053 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4054 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4055 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)o_fwd); | |
078e7b4a JB |
4056 | } |
4057 | ||
078e7b4a | 4058 | void |
ce5b453a SM |
4059 | defvar_lisp (struct Lisp_Objfwd *o_fwd, |
4060 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4061 | { |
ce5b453a | 4062 | defvar_lisp_nopro (o_fwd, namestring, address); |
1a0f90f7 | 4063 | staticpro (address); |
078e7b4a JB |
4064 | } |
4065 | ||
950c215d | 4066 | /* Similar but define a variable whose value is the Lisp Object stored |
4ac38690 | 4067 | at a particular offset in the current kboard object. */ |
950c215d KH |
4068 | |
4069 | void | |
ce5b453a SM |
4070 | defvar_kboard (struct Lisp_Kboard_Objfwd *ko_fwd, |
4071 | const char *namestring, int offset) | |
950c215d | 4072 | { |
ce5b453a | 4073 | Lisp_Object sym; |
5e2327cf | 4074 | sym = intern_c_string (namestring); |
ce5b453a SM |
4075 | ko_fwd->type = Lisp_Fwd_Kboard_Obj; |
4076 | ko_fwd->offset = offset; | |
b9598260 | 4077 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4078 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4079 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)ko_fwd); | |
950c215d | 4080 | } |
078e7b4a | 4081 | \f |
11938f10 KH |
4082 | /* Record the value of load-path used at the start of dumping |
4083 | so we can see if the site changed it later during dumping. */ | |
4084 | static Lisp_Object dump_path; | |
4085 | ||
d5b28a9d | 4086 | void |
971de7fb | 4087 | init_lread (void) |
078e7b4a | 4088 | { |
8ea90aa3 | 4089 | const char *normal; |
e73997a1 | 4090 | int turn_off_warning = 0; |
078e7b4a | 4091 | |
9d8d07e5 GM |
4092 | /* Compute the default Vload-path, with the following logic: |
4093 | If CANNOT_DUMP just use PATH_LOADSEARCH. | |
4094 | Else if purify-flag (ie dumping) start from PATH_DUMPLOADSEARCH; | |
4095 | otherwise start from PATH_LOADSEARCH. | |
4096 | If !initialized, then just set both Vload_path and dump_path. | |
4097 | If initialized, then if Vload_path != dump_path, do nothing. | |
4098 | (Presumably the load-path has already been changed by something.) | |
4099 | Also do nothing if Vinstallation_directory is nil. | |
4100 | Otherwise: | |
4101 | Remove site-lisp directories from the front of load-path. | |
4102 | Add installation-dir/lisp (if exists and not already a member), | |
4103 | at the front, and turn off warnings about missing directories | |
4104 | (because we are presumably running uninstalled). | |
4105 | If it does not exist, add dump_path at the end instead. | |
4106 | Add installation-dir/leim (if exists and not already a member) | |
4107 | at the front. | |
4108 | Add installation-dir/site-lisp (if !no_site_lisp, and exists | |
4109 | and not already a member) at the front. | |
4110 | If installation-dir != source-dir (ie running an uninstalled, | |
4111 | out-of-tree build) AND install-dir/src/Makefile exists BUT | |
4112 | install-dir/src/Makefile.in does NOT exist (this is a sanity | |
4113 | check), then repeat the above steps for source-dir/lisp, | |
4114 | leim and site-lisp. | |
4115 | Finally, add the previously removed site-lisp directories back | |
4116 | at the front (if !no_site_lisp). | |
4117 | ||
4118 | We then warn about any of the load-path elements that do not | |
4119 | exist. The only ones that might not exist are those from | |
4120 | PATH_LOADSEARCH, and perhaps dump_path. | |
4121 | ||
4122 | Having done all this, we then throw it all away if purify-flag is | |
4123 | nil (ie, not dumping) and EMACSLOADPATH is set, and just | |
4124 | unconditionally use the latter value instead. | |
4125 | So AFAICS the only net results of all the previous steps will be | |
4126 | possibly to issue some irrelevant warnings. | |
4127 | ||
4128 | FIXME? There's a case for saying that if we are running | |
4129 | uninstalled, the eventual installation directories should not yet | |
4130 | be included in load-path. | |
4131 | */ | |
46947372 JB |
4132 | #ifdef CANNOT_DUMP |
4133 | normal = PATH_LOADSEARCH; | |
e065a56e | 4134 | Vload_path = decode_env_path (0, normal); |
46947372 JB |
4135 | #else |
4136 | if (NILP (Vpurify_flag)) | |
4137 | normal = PATH_LOADSEARCH; | |
279499f0 | 4138 | else |
46947372 | 4139 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 4140 | |
9d8d07e5 GM |
4141 | /* In a dumped Emacs, we normally reset the value of Vload_path using |
4142 | PATH_LOADSEARCH, since the value that was dumped uses lisp/ in | |
4143 | the source directory, instead of the path of the installed elisp | |
4144 | libraries. However, if it appears that Vload_path has already been | |
4145 | changed from the default that was saved before dumping, don't | |
4146 | change it further. */ | |
4746118a JB |
4147 | if (initialized) |
4148 | { | |
4746118a | 4149 | if (! NILP (Fequal (dump_path, Vload_path))) |
80667d53 RS |
4150 | { |
4151 | Vload_path = decode_env_path (0, normal); | |
ce316182 | 4152 | if (no_site_lisp || !NILP (Vinstallation_directory)) |
80667d53 | 4153 | { |
3ddff138 RS |
4154 | Lisp_Object tem, tem1, sitelisp; |
4155 | ||
9d8d07e5 GM |
4156 | /* Remove "site-lisp" dirs from front of path temporarily |
4157 | and store them in sitelisp, then conc them on at the | |
4158 | end so they're always first in path. | |
ce316182 GM |
4159 | Note that this won't work if you used a |
4160 | --enable-locallisppath element that does not happen | |
9d8d07e5 | 4161 | to contain "site-lisp" in its name. |
ce316182 | 4162 | */ |
3ddff138 RS |
4163 | sitelisp = Qnil; |
4164 | while (1) | |
4165 | { | |
4166 | tem = Fcar (Vload_path); | |
4167 | tem1 = Fstring_match (build_string ("site-lisp"), | |
4168 | tem, Qnil); | |
4169 | if (!NILP (tem1)) | |
4170 | { | |
4171 | Vload_path = Fcdr (Vload_path); | |
4172 | sitelisp = Fcons (tem, sitelisp); | |
4173 | } | |
4174 | else | |
4175 | break; | |
4176 | } | |
4177 | ||
ce316182 | 4178 | if (!NILP (Vinstallation_directory)) |
c478f98c | 4179 | { |
ce316182 GM |
4180 | /* Add to the path the lisp subdir of the |
4181 | installation dir, if it exists. */ | |
4182 | tem = Fexpand_file_name (build_string ("lisp"), | |
7efa6272 GM |
4183 | Vinstallation_directory); |
4184 | tem1 = Ffile_exists_p (tem); | |
4185 | if (!NILP (tem1)) | |
4186 | { | |
4187 | if (NILP (Fmember (tem, Vload_path))) | |
ce316182 GM |
4188 | { |
4189 | turn_off_warning = 1; | |
4190 | Vload_path = Fcons (tem, Vload_path); | |
4191 | } | |
7efa6272 | 4192 | } |
ce316182 GM |
4193 | else |
4194 | /* That dir doesn't exist, so add the build-time | |
4195 | Lisp dirs instead. */ | |
4196 | Vload_path = nconc2 (Vload_path, dump_path); | |
33046fc9 | 4197 | |
ce316182 GM |
4198 | /* Add leim under the installation dir, if it exists. */ |
4199 | tem = Fexpand_file_name (build_string ("leim"), | |
0f337465 RS |
4200 | Vinstallation_directory); |
4201 | tem1 = Ffile_exists_p (tem); | |
ce316182 | 4202 | if (!NILP (tem1)) |
0f337465 | 4203 | { |
0f337465 | 4204 | if (NILP (Fmember (tem, Vload_path))) |
3ddff138 | 4205 | Vload_path = Fcons (tem, Vload_path); |
ce316182 | 4206 | } |
0f337465 | 4207 | |
ce316182 GM |
4208 | /* Add site-lisp under the installation dir, if it exists. */ |
4209 | if (!no_site_lisp) | |
4210 | { | |
4211 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
4212 | Vinstallation_directory); | |
4213 | tem1 = Ffile_exists_p (tem); | |
4214 | if (!NILP (tem1)) | |
4215 | { | |
4216 | if (NILP (Fmember (tem, Vload_path))) | |
4217 | Vload_path = Fcons (tem, Vload_path); | |
4218 | } | |
4219 | } | |
9fbc0116 | 4220 | |
ce316182 GM |
4221 | /* If Emacs was not built in the source directory, |
4222 | and it is run from where it was built, add to load-path | |
4223 | the lisp, leim and site-lisp dirs under that directory. */ | |
9fbc0116 | 4224 | |
ce316182 GM |
4225 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) |
4226 | { | |
4227 | Lisp_Object tem2; | |
4228 | ||
4229 | tem = Fexpand_file_name (build_string ("src/Makefile"), | |
4230 | Vinstallation_directory); | |
4231 | tem1 = Ffile_exists_p (tem); | |
4232 | ||
4233 | /* Don't be fooled if they moved the entire source tree | |
4234 | AFTER dumping Emacs. If the build directory is indeed | |
4235 | different from the source dir, src/Makefile.in and | |
4236 | src/Makefile will not be found together. */ | |
4237 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
4238 | Vinstallation_directory); | |
4239 | tem2 = Ffile_exists_p (tem); | |
4240 | if (!NILP (tem1) && NILP (tem2)) | |
7efa6272 | 4241 | { |
ce316182 | 4242 | tem = Fexpand_file_name (build_string ("lisp"), |
7efa6272 | 4243 | Vsource_directory); |
0f337465 | 4244 | |
7efa6272 GM |
4245 | if (NILP (Fmember (tem, Vload_path))) |
4246 | Vload_path = Fcons (tem, Vload_path); | |
ce316182 GM |
4247 | |
4248 | tem = Fexpand_file_name (build_string ("leim"), | |
7efa6272 | 4249 | Vsource_directory); |
0f337465 | 4250 | |
7efa6272 GM |
4251 | if (NILP (Fmember (tem, Vload_path))) |
4252 | Vload_path = Fcons (tem, Vload_path); | |
ce316182 GM |
4253 | |
4254 | if (!no_site_lisp) | |
4255 | { | |
4256 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
4257 | Vsource_directory); | |
4258 | ||
4259 | if (NILP (Fmember (tem, Vload_path))) | |
4260 | Vload_path = Fcons (tem, Vload_path); | |
4261 | } | |
7efa6272 | 4262 | } |
ce316182 GM |
4263 | } /* Vinstallation_directory != Vsource_directory */ |
4264 | } /* if Vinstallation_directory */ | |
66b7b0fe | 4265 | if (!NILP (sitelisp) && !no_site_lisp) |
3ddff138 | 4266 | Vload_path = nconc2 (Fnreverse (sitelisp), Vload_path); |
ce316182 | 4267 | } /* if Vinstallation_directory || no_site_lisp */ |
9d8d07e5 | 4268 | } /* if dump_path == Vload_path */ |
4746118a | 4269 | } |
9d8d07e5 | 4270 | else /* !initialized */ |
11938f10 | 4271 | { |
7b396c6c RS |
4272 | /* NORMAL refers to the lisp dir in the source directory. */ |
4273 | /* We used to add ../lisp at the front here, but | |
4274 | that caused trouble because it was copied from dump_path | |
88852d45 | 4275 | into Vload_path, above, when Vinstallation_directory was non-nil. |
7b396c6c RS |
4276 | It should be unnecessary. */ |
4277 | Vload_path = decode_env_path (0, normal); | |
11938f10 KH |
4278 | dump_path = Vload_path; |
4279 | } | |
9d8d07e5 | 4280 | #endif /* CANNOT_DUMP */ |
279499f0 | 4281 | |
9735b9ce | 4282 | #if (!(defined (WINDOWSNT) || (defined (HAVE_NS)))) |
177c0ea7 JB |
4283 | /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is |
4284 | almost never correct, thereby causing a warning to be printed out that | |
8e6208c5 | 4285 | confuses users. Since PATH_LOADSEARCH is always overridden by the |
9e2a2647 | 4286 | EMACSLOADPATH environment variable below, disable the warning on NT. */ |
317073d5 | 4287 | |
9d8d07e5 GM |
4288 | /* HAVE_NS also uses EMACSLOADPATH. */ |
4289 | ||
078e7b4a | 4290 | /* Warn if dirs in the *standard* path don't exist. */ |
e73997a1 RS |
4291 | if (!turn_off_warning) |
4292 | { | |
4293 | Lisp_Object path_tail; | |
078e7b4a | 4294 | |
e73997a1 RS |
4295 | for (path_tail = Vload_path; |
4296 | !NILP (path_tail); | |
c1d497be | 4297 | path_tail = XCDR (path_tail)) |
e73997a1 RS |
4298 | { |
4299 | Lisp_Object dirfile; | |
4300 | dirfile = Fcar (path_tail); | |
4301 | if (STRINGP (dirfile)) | |
4302 | { | |
4303 | dirfile = Fdirectory_file_name (dirfile); | |
9d8d07e5 GM |
4304 | /* Do we really need to warn about missing site-lisp dirs? |
4305 | It's true that the installation should have created | |
4306 | them and added subdirs.el, but it's harmless if they | |
4307 | are not there. */ | |
42a5b22f | 4308 | if (access (SSDATA (dirfile), 0) < 0) |
85496b8c | 4309 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", |
c1d497be | 4310 | XCAR (path_tail)); |
e73997a1 RS |
4311 | } |
4312 | } | |
4313 | } | |
9e2a2647 | 4314 | #endif /* !(WINDOWSNT || HAVE_NS) */ |
46947372 JB |
4315 | |
4316 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
4317 | This doesn't apply if we're dumping. */ | |
ffd9c2a1 | 4318 | #ifndef CANNOT_DUMP |
46947372 JB |
4319 | if (NILP (Vpurify_flag) |
4320 | && egetenv ("EMACSLOADPATH")) | |
ffd9c2a1 | 4321 | #endif |
279499f0 | 4322 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
279499f0 JB |
4323 | |
4324 | Vvalues = Qnil; | |
4325 | ||
078e7b4a | 4326 | load_in_progress = 0; |
4e53f562 | 4327 | Vload_file_name = Qnil; |
d2c6be7f RS |
4328 | |
4329 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
4330 | |
4331 | Vstandard_input = Qt; | |
f74b0705 | 4332 | Vloads_in_progress = Qnil; |
078e7b4a JB |
4333 | } |
4334 | ||
85496b8c | 4335 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
88852d45 | 4336 | does not exist. Print it on stderr and put it in *Messages*. */ |
85496b8c | 4337 | |
d5b28a9d | 4338 | void |
a8fe7202 | 4339 | dir_warning (const char *format, Lisp_Object dirname) |
85496b8c | 4340 | { |
d5db4077 | 4341 | fprintf (stderr, format, SDATA (dirname)); |
0df02bf3 | 4342 | |
48def666 | 4343 | /* Don't log the warning before we've initialized!! */ |
9b69357e | 4344 | if (initialized) |
0df02bf3 PE |
4345 | { |
4346 | char *buffer; | |
4347 | ptrdiff_t message_len; | |
4348 | USE_SAFE_ALLOCA; | |
4349 | SAFE_ALLOCA (buffer, char *, | |
4350 | SBYTES (dirname) + strlen (format) - (sizeof "%s" - 1) + 1); | |
4351 | message_len = esprintf (buffer, format, SDATA (dirname)); | |
4352 | message_dolog (buffer, message_len, 0, STRING_MULTIBYTE (dirname)); | |
4353 | SAFE_FREE (); | |
4354 | } | |
85496b8c RS |
4355 | } |
4356 | ||
078e7b4a | 4357 | void |
971de7fb | 4358 | syms_of_lread (void) |
078e7b4a JB |
4359 | { |
4360 | defsubr (&Sread); | |
4361 | defsubr (&Sread_from_string); | |
4362 | defsubr (&Sintern); | |
4363 | defsubr (&Sintern_soft); | |
d007f5c8 | 4364 | defsubr (&Sunintern); |
971a4293 | 4365 | defsubr (&Sget_load_suffixes); |
078e7b4a | 4366 | defsubr (&Sload); |
228d4b1c | 4367 | defsubr (&Seval_buffer); |
078e7b4a JB |
4368 | defsubr (&Seval_region); |
4369 | defsubr (&Sread_char); | |
4370 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 4371 | defsubr (&Sread_event); |
078e7b4a JB |
4372 | defsubr (&Sget_file_char); |
4373 | defsubr (&Smapatoms); | |
86d00812 | 4374 | defsubr (&Slocate_file_internal); |
078e7b4a | 4375 | |
29208e82 | 4376 | DEFVAR_LISP ("obarray", Vobarray, |
5de38842 PJ |
4377 | doc: /* Symbol table for use by `intern' and `read'. |
4378 | It is a vector whose length ought to be prime for best results. | |
4379 | The vector's contents don't make sense if examined from Lisp programs; | |
4380 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a | 4381 | |
29208e82 | 4382 | DEFVAR_LISP ("values", Vvalues, |
5de38842 PJ |
4383 | doc: /* List of values of all expressions which were read, evaluated and printed. |
4384 | Order is reverse chronological. */); | |
078e7b4a | 4385 | |
29208e82 | 4386 | DEFVAR_LISP ("standard-input", Vstandard_input, |
5de38842 PJ |
4387 | doc: /* Stream for read to get input from. |
4388 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
4389 | Vstandard_input = Qt; |
4390 | ||
29208e82 | 4391 | DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions, |
abb13b09 CW |
4392 | doc: /* If non-nil, add position of read symbols to `read-symbol-positions-list'. |
4393 | ||
4394 | If this variable is a buffer, then only forms read from that buffer | |
4395 | will be added to `read-symbol-positions-list'. | |
4396 | If this variable is t, then all read forms will be added. | |
4397 | The effect of all other values other than nil are not currently | |
4398 | defined, although they may be in the future. | |
4399 | ||
4400 | The positions are relative to the last call to `read' or | |
4401 | `read-from-string'. It is probably a bad idea to set this variable at | |
4402 | the toplevel; bind it instead. */); | |
4403 | Vread_with_symbol_positions = Qnil; | |
4404 | ||
29208e82 | 4405 | DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list, |
d6567030 | 4406 | doc: /* A list mapping read symbols to their positions. |
abb13b09 CW |
4407 | This variable is modified during calls to `read' or |
4408 | `read-from-string', but only when `read-with-symbol-positions' is | |
4409 | non-nil. | |
4410 | ||
4411 | Each element of the list looks like (SYMBOL . CHAR-POSITION), where | |
d6567030 | 4412 | CHAR-POSITION is an integer giving the offset of that occurrence of the |
abb13b09 CW |
4413 | symbol from the position where `read' or `read-from-string' started. |
4414 | ||
4415 | Note that a symbol will appear multiple times in this list, if it was | |
4416 | read multiple times. The list is in the same order as the symbols | |
4417 | were read in. */); | |
177c0ea7 | 4418 | Vread_symbol_positions_list = Qnil; |
abb13b09 | 4419 | |
29208e82 | 4420 | DEFVAR_LISP ("read-circle", Vread_circle, |
91f68422 CY |
4421 | doc: /* Non-nil means read recursive structures using #N= and #N# syntax. */); |
4422 | Vread_circle = Qt; | |
4423 | ||
29208e82 | 4424 | DEFVAR_LISP ("load-path", Vload_path, |
fb7ada5f | 4425 | doc: /* List of directories to search for files to load. |
5de38842 PJ |
4426 | Each element is a string (directory name) or nil (try default directory). |
4427 | Initialized based on EMACSLOADPATH environment variable, if any, | |
4428 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 4429 | |
29208e82 | 4430 | DEFVAR_LISP ("load-suffixes", Vload_suffixes, |
971a4293 LT |
4431 | doc: /* List of suffixes for (compiled or source) Emacs Lisp files. |
4432 | This list should not include the empty string. | |
4433 | `load' and related functions try to append these suffixes, in order, | |
4434 | to the specified file name if a Lisp suffix is allowed or required. */); | |
a4ada374 DN |
4435 | Vload_suffixes = Fcons (make_pure_c_string (".elc"), |
4436 | Fcons (make_pure_c_string (".el"), Qnil)); | |
29208e82 | 4437 | DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes, |
971a4293 LT |
4438 | doc: /* List of suffixes that indicate representations of \ |
4439 | the same file. | |
4440 | This list should normally start with the empty string. | |
4441 | ||
4442 | Enabling Auto Compression mode appends the suffixes in | |
4443 | `jka-compr-load-suffixes' to this list and disabling Auto Compression | |
4444 | mode removes them again. `load' and related functions use this list to | |
4445 | determine whether they should look for compressed versions of a file | |
4446 | and, if so, which suffixes they should try to append to the file name | |
4447 | in order to do so. However, if you want to customize which suffixes | |
4448 | the loading functions recognize as compression suffixes, you should | |
4449 | customize `jka-compr-load-suffixes' rather than the present variable. */); | |
a74d1c97 | 4450 | Vload_file_rep_suffixes = Fcons (empty_unibyte_string, Qnil); |
e61b9b87 | 4451 | |
29208e82 | 4452 | DEFVAR_BOOL ("load-in-progress", load_in_progress, |
e0f24100 | 4453 | doc: /* Non-nil if inside of `load'. */); |
cd3520a4 | 4454 | DEFSYM (Qload_in_progress, "load-in-progress"); |
078e7b4a | 4455 | |
29208e82 | 4456 | DEFVAR_LISP ("after-load-alist", Vafter_load_alist, |
5de38842 | 4457 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
6bb6da3e AM |
4458 | Each element looks like (REGEXP-OR-FEATURE FORMS...). |
4459 | ||
4460 | REGEXP-OR-FEATURE is either a regular expression to match file names, or | |
4461 | a symbol \(a feature name). | |
4462 | ||
4463 | When `load' is run and the file-name argument matches an element's | |
4464 | REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol | |
4465 | REGEXP-OR-FEATURE, the FORMS in the element are executed. | |
4466 | ||
4467 | An error in FORMS does not undo the load, but does prevent execution of | |
4468 | the rest of the FORMS. */); | |
078e7b4a JB |
4469 | Vafter_load_alist = Qnil; |
4470 | ||
29208e82 | 4471 | DEFVAR_LISP ("load-history", Vload_history, |
4801c5fa CY |
4472 | doc: /* Alist mapping loaded file names to symbols and features. |
4473 | Each alist element should be a list (FILE-NAME ENTRIES...), where | |
4474 | FILE-NAME is the name of a file that has been loaded into Emacs. | |
4475 | The file name is absolute and true (i.e. it doesn't contain symlinks). | |
4476 | As an exception, one of the alist elements may have FILE-NAME nil, | |
4477 | for symbols and features not associated with any file. | |
4478 | ||
4479 | The remaining ENTRIES in the alist element describe the functions and | |
4480 | variables defined in that file, the features provided, and the | |
4481 | features required. Each entry has the form `(provide . FEATURE)', | |
4482 | `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)', | |
69bb1ef7 LMI |
4483 | `(defface . SYMBOL)', or `(t . SYMBOL)'. Entries like `(t . SYMBOL)' |
4484 | may precede a `(defun . FUNCTION)' entry, and means that SYMBOL was an | |
4485 | autoload before this file redefined it as a function. In addition, | |
4486 | entries may also be single symbols, which means that SYMBOL was | |
4487 | defined by `defvar' or `defconst'. | |
0fc213e9 | 4488 | |
b502a9a1 RS |
4489 | During preloading, the file name recorded is relative to the main Lisp |
4490 | directory. These file names are converted to absolute at startup. */); | |
ae321d28 RS |
4491 | Vload_history = Qnil; |
4492 | ||
29208e82 | 4493 | DEFVAR_LISP ("load-file-name", Vload_file_name, |
5de38842 | 4494 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
4495 | Vload_file_name = Qnil; |
4496 | ||
29208e82 | 4497 | DEFVAR_LISP ("user-init-file", Vuser_init_file, |
5de38842 | 4498 | doc: /* File name, including directory, of user's initialization file. |
0a25a201 RS |
4499 | If the file loaded had extension `.elc', and the corresponding source file |
4500 | exists, this variable contains the name of source file, suitable for use | |
099de390 JB |
4501 | by functions like `custom-save-all' which edit the init file. |
4502 | While Emacs loads and evaluates the init file, value is the real name | |
4503 | of the file, regardless of whether or not it has the `.elc' extension. */); | |
4116ab9f KH |
4504 | Vuser_init_file = Qnil; |
4505 | ||
29208e82 | 4506 | DEFVAR_LISP ("current-load-list", Vcurrent_load_list, |
5de38842 | 4507 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
4508 | Vcurrent_load_list = Qnil; |
4509 | ||
29208e82 | 4510 | DEFVAR_LISP ("load-read-function", Vload_read_function, |
5de38842 PJ |
4511 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
4512 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
4513 | Vload_read_function = Qnil; |
4514 | ||
29208e82 | 4515 | DEFVAR_LISP ("load-source-file-function", Vload_source_file_function, |
9b33a603 | 4516 | doc: /* Function called in `load' for loading an Emacs Lisp source file. |
5de38842 PJ |
4517 | This function is for doing code conversion before reading the source file. |
4518 | If nil, loading is done without any code conversion. | |
4519 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
4520 | FULLNAME is the full name of FILE. | |
4521 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
4522 | Vload_source_file_function = Qnil; |
4523 | ||
29208e82 | 4524 | DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings, |
5de38842 PJ |
4525 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
4526 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
4527 | load_force_doc_strings = 0; |
4528 | ||
29208e82 | 4529 | DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte, |
5de38842 PJ |
4530 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
4531 | This is normally bound by `load' and `eval-buffer' to control `read', | |
4532 | and is not meant for users to change. */); | |
94e554db RS |
4533 | load_convert_to_unibyte = 0; |
4534 | ||
29208e82 | 4535 | DEFVAR_LISP ("source-directory", Vsource_directory, |
5de38842 PJ |
4536 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
4537 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
4538 | Vsource_directory |
4539 | = Fexpand_file_name (build_string ("../"), | |
4540 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
4541 | ||
29208e82 | 4542 | DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list, |
5de38842 | 4543 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
4544 | Vpreloaded_file_list = Qnil; |
4545 | ||
29208e82 | 4546 | DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars, |
5de38842 | 4547 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
4548 | Vbyte_boolean_vars = Qnil; |
4549 | ||
29208e82 | 4550 | DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries, |
5de38842 PJ |
4551 | doc: /* Non-nil means load dangerous compiled Lisp files. |
4552 | Some versions of XEmacs use different byte codes than Emacs. These | |
4553 | incompatible byte codes can make Emacs crash when it tries to execute | |
4554 | them. */); | |
da84f340 GM |
4555 | load_dangerous_libraries = 0; |
4556 | ||
29208e82 | 4557 | DEFVAR_BOOL ("force-load-messages", force_load_messages, |
beb0b7f9 EZ |
4558 | doc: /* Non-nil means force printing messages when loading Lisp files. |
4559 | This overrides the value of the NOMESSAGE argument to `load'. */); | |
4560 | force_load_messages = 0; | |
4561 | ||
29208e82 | 4562 | DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp, |
5de38842 PJ |
4563 | doc: /* Regular expression matching safe to load compiled Lisp files. |
4564 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
4565 | from the file, and matches them against this regular expression. | |
4566 | When the regular expression matches, the file is considered to be safe | |
4567 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 4568 | Vbytecomp_version_regexp |
d67b4f80 | 4569 | = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 4570 | |
b9598260 SM |
4571 | Qlexical_binding = intern ("lexical-binding"); |
4572 | staticpro (&Qlexical_binding); | |
8f1d2ef6 | 4573 | DEFVAR_LISP ("lexical-binding", Vlexical_binding, |
f41628b2 LMI |
4574 | doc: /* Whether to use lexical binding when evaluating code. |
4575 | Non-nil means that the code in the current buffer should be evaluated | |
4576 | with lexical binding. | |
1d698799 | 4577 | This variable is automatically set from the file variables of an |
48da7392 GM |
4578 | interpreted Lisp file read using `load'. Unlike other file local |
4579 | variables, this must be set in the first line of a file. */); | |
b9598260 SM |
4580 | Fmake_variable_buffer_local (Qlexical_binding); |
4581 | ||
29208e82 | 4582 | DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list, |
3f39f996 RS |
4583 | doc: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */); |
4584 | Veval_buffer_list = Qnil; | |
4585 | ||
29208e82 | 4586 | DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes, |
5aa273b0 SM |
4587 | doc: /* Set to non-nil when `read' encounters an old-style backquote. */); |
4588 | Vold_style_backquotes = Qnil; | |
cd3520a4 | 4589 | DEFSYM (Qold_style_backquotes, "old-style-backquotes"); |
5aa273b0 | 4590 | |
a90ba1e2 KH |
4591 | /* Vsource_directory was initialized in init_lread. */ |
4592 | ||
d2c6be7f RS |
4593 | load_descriptor_list = Qnil; |
4594 | staticpro (&load_descriptor_list); | |
4595 | ||
cd3520a4 JB |
4596 | DEFSYM (Qcurrent_load_list, "current-load-list"); |
4597 | DEFSYM (Qstandard_input, "standard-input"); | |
4598 | DEFSYM (Qread_char, "read-char"); | |
4599 | DEFSYM (Qget_file_char, "get-file-char"); | |
4600 | DEFSYM (Qget_emacs_mule_file_char, "get-emacs-mule-file-char"); | |
4601 | DEFSYM (Qload_force_doc_strings, "load-force-doc-strings"); | |
4602 | ||
4603 | DEFSYM (Qbackquote, "`"); | |
4604 | DEFSYM (Qcomma, ","); | |
4605 | DEFSYM (Qcomma_at, ",@"); | |
4606 | DEFSYM (Qcomma_dot, ",."); | |
4607 | ||
4608 | DEFSYM (Qinhibit_file_name_operation, "inhibit-file-name-operation"); | |
4609 | DEFSYM (Qascii_character, "ascii-character"); | |
4610 | DEFSYM (Qfunction, "function"); | |
4611 | DEFSYM (Qload, "load"); | |
4612 | DEFSYM (Qload_file_name, "load-file-name"); | |
4613 | DEFSYM (Qeval_buffer_list, "eval-buffer-list"); | |
4614 | DEFSYM (Qfile_truename, "file-truename"); | |
4615 | DEFSYM (Qdir_ok, "dir-ok"); | |
4616 | DEFSYM (Qdo_after_load_evaluation, "do-after-load-evaluation"); | |
6bb6da3e | 4617 | |
11938f10 | 4618 | staticpro (&dump_path); |
4ad679f9 EN |
4619 | |
4620 | staticpro (&read_objects); | |
4621 | read_objects = Qnil; | |
9e062b6c | 4622 | staticpro (&seen_list); |
f153db13 | 4623 | seen_list = Qnil; |
177c0ea7 | 4624 | |
7ee3bd7b GM |
4625 | Vloads_in_progress = Qnil; |
4626 | staticpro (&Vloads_in_progress); | |
f19a0f5b | 4627 | |
cd3520a4 JB |
4628 | DEFSYM (Qhash_table, "hash-table"); |
4629 | DEFSYM (Qdata, "data"); | |
4630 | DEFSYM (Qtest, "test"); | |
4631 | DEFSYM (Qsize, "size"); | |
4632 | DEFSYM (Qweakness, "weakness"); | |
4633 | DEFSYM (Qrehash_size, "rehash-size"); | |
4634 | DEFSYM (Qrehash_threshold, "rehash-threshold"); | |
078e7b4a | 4635 | } |