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. */ |
39adff0d | 28 | #include <stat-time.h> |
078e7b4a | 29 | #include "lisp.h" |
95384e1e | 30 | #include "intervals.h" |
1571601b | 31 | #include "character.h" |
e5560ff7 | 32 | #include "buffer.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 | ||
9e059e3f GM |
47 | #ifdef HAVE_NS |
48 | #include "nsterm.h" | |
49 | #endif | |
50 | ||
c1a2f60a | 51 | #include <unistd.h> |
078e7b4a | 52 | |
c011e9a5 RS |
53 | #ifdef HAVE_SETLOCALE |
54 | #include <locale.h> | |
55 | #endif /* HAVE_SETLOCALE */ | |
56 | ||
bcdec28b | 57 | #include <fcntl.h> |
f7d279f0 | 58 | |
79cf851c | 59 | #ifdef HAVE_FSEEKO |
68c45bf0 PE |
60 | #define file_offset off_t |
61 | #define file_tell ftello | |
62 | #else | |
63 | #define file_offset long | |
64 | #define file_tell ftell | |
65 | #endif | |
66 | ||
48def666 | 67 | /* Hash table read constants. */ |
955cbe7b PE |
68 | static Lisp_Object Qhash_table, Qdata; |
69 | static Lisp_Object Qtest, Qsize; | |
70 | static Lisp_Object Qweakness; | |
71 | static Lisp_Object Qrehash_size; | |
72 | static Lisp_Object Qrehash_threshold; | |
73 | ||
74 | static Lisp_Object Qread_char, Qget_file_char, Qcurrent_load_list; | |
75 | Lisp_Object Qstandard_input; | |
29208e82 | 76 | Lisp_Object Qvariable_documentation; |
955cbe7b | 77 | static Lisp_Object Qascii_character, Qload, Qload_file_name; |
2b6cae0c | 78 | Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction; |
955cbe7b PE |
79 | static Lisp_Object Qinhibit_file_name_operation; |
80 | static Lisp_Object Qeval_buffer_list; | |
8be3a09c | 81 | Lisp_Object Qlexical_binding; |
955cbe7b | 82 | static Lisp_Object Qfile_truename, Qdo_after_load_evaluation; /* ACM 2006/5/16 */ |
7bd279cd | 83 | |
8792be66 KH |
84 | /* Used instead of Qget_file_char while loading *.elc files compiled |
85 | by Emacs 21 or older. */ | |
86 | static Lisp_Object Qget_emacs_mule_file_char; | |
87 | ||
88 | static Lisp_Object Qload_force_doc_strings; | |
89 | ||
2baf5e76 | 90 | static Lisp_Object Qload_in_progress; |
ece435a5 | 91 | |
4ad679f9 EN |
92 | /* The association list of objects read with the #n=object form. |
93 | Each member of the list has the form (n . object), and is used to | |
94 | look up the object for the corresponding #n# construct. | |
95 | It must be set to nil before all top-level calls to read0. */ | |
1e3890d1 | 96 | static Lisp_Object read_objects; |
4ad679f9 | 97 | |
8792be66 KH |
98 | /* Nonzero means READCHAR should read bytes one by one (not character) |
99 | when READCHARFUN is Qget_file_char or Qget_emacs_mule_file_char. | |
100 | This is set to 1 by read1 temporarily while handling #@NUMBER. */ | |
101 | static int load_each_byte; | |
102 | ||
d2c6be7f RS |
103 | /* List of descriptors now open for Fload. */ |
104 | static Lisp_Object load_descriptor_list; | |
105 | ||
b2a30870 | 106 | /* File for get_file_char to read from. Use by load. */ |
078e7b4a JB |
107 | static FILE *instream; |
108 | ||
b2a30870 | 109 | /* For use within read-from-string (this reader is non-reentrant!!) */ |
d311d28c PE |
110 | static ptrdiff_t read_from_string_index; |
111 | static ptrdiff_t read_from_string_index_byte; | |
112 | static ptrdiff_t read_from_string_limit; | |
17634846 | 113 | |
abb13b09 | 114 | /* Number of characters read in the current call to Fread or |
48def666 | 115 | Fread_from_string. */ |
da43f021 | 116 | static EMACS_INT readchar_count; |
6f7f43d5 | 117 | |
c15cfd1f | 118 | /* This contains the last string skipped with #@. */ |
b2a30870 RS |
119 | static char *saved_doc_string; |
120 | /* Length of buffer allocated in saved_doc_string. */ | |
bfbbd7e7 | 121 | static ptrdiff_t saved_doc_string_size; |
b2a30870 | 122 | /* Length of actual data in saved_doc_string. */ |
bfbbd7e7 | 123 | static ptrdiff_t saved_doc_string_length; |
b2a30870 | 124 | /* This is the file position that string came from. */ |
68c45bf0 | 125 | static file_offset saved_doc_string_position; |
b2a30870 | 126 | |
c15cfd1f RS |
127 | /* This contains the previous string skipped with #@. |
128 | We copy it from saved_doc_string when a new string | |
129 | is put in saved_doc_string. */ | |
130 | static char *prev_saved_doc_string; | |
131 | /* Length of buffer allocated in prev_saved_doc_string. */ | |
bfbbd7e7 | 132 | static ptrdiff_t prev_saved_doc_string_size; |
c15cfd1f | 133 | /* Length of actual data in prev_saved_doc_string. */ |
bfbbd7e7 | 134 | static ptrdiff_t prev_saved_doc_string_length; |
c15cfd1f | 135 | /* This is the file position that string came from. */ |
68c45bf0 | 136 | static file_offset prev_saved_doc_string_position; |
c15cfd1f | 137 | |
17634846 RS |
138 | /* Nonzero means inside a new-style backquote |
139 | with no surrounding parentheses. | |
140 | Fread initializes this to zero, so we need not specbind it | |
141 | or worry about what happens to it when there is an error. */ | |
142 | static int new_backquote_flag; | |
29208e82 | 143 | static Lisp_Object Qold_style_backquotes; |
7ee3bd7b GM |
144 | |
145 | /* A list of file names for files being loaded in Fload. Used to | |
146 | check for recursive loads. */ | |
147 | ||
9942fa0c | 148 | static Lisp_Object Vloads_in_progress; |
7ee3bd7b | 149 | |
f57e2426 J |
150 | static int read_emacs_mule_char (int, int (*) (int, Lisp_Object), |
151 | Lisp_Object); | |
8792be66 | 152 | |
defb1411 | 153 | static void readevalloop (Lisp_Object, FILE*, Lisp_Object, int, |
f57e2426 J |
154 | Lisp_Object, Lisp_Object, |
155 | Lisp_Object, Lisp_Object); | |
156 | static Lisp_Object load_unwind (Lisp_Object); | |
157 | static Lisp_Object load_descriptor_unwind (Lisp_Object); | |
078e7b4a | 158 | \f |
8792be66 KH |
159 | /* Functions that read one byte from the current source READCHARFUN |
160 | or unreads one byte. If the integer argument C is -1, it returns | |
161 | one read byte, or -1 when there's no more byte in the source. If C | |
162 | is 0 or positive, it unreads C, and the return value is not | |
163 | interesting. */ | |
164 | ||
f57e2426 J |
165 | static int readbyte_for_lambda (int, Lisp_Object); |
166 | static int readbyte_from_file (int, Lisp_Object); | |
167 | static int readbyte_from_string (int, Lisp_Object); | |
8792be66 | 168 | |
078e7b4a JB |
169 | /* Handle unreading and rereading of characters. |
170 | Write READCHAR to read a character, | |
fe0e03f3 KH |
171 | UNREAD(c) to unread c to be read again. |
172 | ||
8792be66 | 173 | These macros correctly read/unread multibyte characters. */ |
078e7b4a | 174 | |
1202434b | 175 | #define READCHAR readchar (readcharfun, NULL) |
078e7b4a JB |
176 | #define UNREAD(c) unreadchar (readcharfun, c) |
177 | ||
1202434b KH |
178 | /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */ |
179 | #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte) | |
180 | ||
8792be66 | 181 | /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char, |
8f924df7 KH |
182 | Qlambda, or a cons, we use this to keep an unread character because |
183 | a file stream can't handle multibyte-char unreading. The value -1 | |
48def666 | 184 | means that there's no unread character. */ |
8792be66 KH |
185 | static int unread_char; |
186 | ||
078e7b4a | 187 | static int |
fce31d69 | 188 | readchar (Lisp_Object readcharfun, bool *multibyte) |
078e7b4a JB |
189 | { |
190 | Lisp_Object tem; | |
95384e1e | 191 | register int c; |
f57e2426 | 192 | int (*readbyte) (int, Lisp_Object); |
8792be66 KH |
193 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; |
194 | int i, len; | |
195 | int emacs_mule_encoding = 0; | |
078e7b4a | 196 | |
1202434b KH |
197 | if (multibyte) |
198 | *multibyte = 0; | |
199 | ||
abb13b09 | 200 | readchar_count++; |
177c0ea7 | 201 | |
cfff016d | 202 | if (BUFFERP (readcharfun)) |
078e7b4a | 203 | { |
bed23cb2 | 204 | register struct buffer *inbuffer = XBUFFER (readcharfun); |
078e7b4a | 205 | |
d311d28c | 206 | ptrdiff_t pt_byte = BUF_PT_BYTE (inbuffer); |
00a9a935 | 207 | |
bed23cb2 RS |
208 | if (pt_byte >= BUF_ZV_BYTE (inbuffer)) |
209 | return -1; | |
078e7b4a | 210 | |
4b4deea2 | 211 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 212 | { |
00a9a935 | 213 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
214 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, pt_byte); |
215 | BUF_INC_POS (inbuffer, pt_byte); | |
62a6e103 | 216 | c = STRING_CHAR (p); |
1202434b KH |
217 | if (multibyte) |
218 | *multibyte = 1; | |
bed23cb2 RS |
219 | } |
220 | else | |
221 | { | |
222 | c = BUF_FETCH_BYTE (inbuffer, pt_byte); | |
8792be66 KH |
223 | if (! ASCII_BYTE_P (c)) |
224 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 225 | pt_byte++; |
6f7f43d5 | 226 | } |
bed23cb2 | 227 | SET_BUF_PT_BOTH (inbuffer, BUF_PT (inbuffer) + 1, pt_byte); |
6f7f43d5 | 228 | |
bed23cb2 | 229 | return c; |
078e7b4a | 230 | } |
cfff016d | 231 | if (MARKERP (readcharfun)) |
078e7b4a | 232 | { |
bed23cb2 | 233 | register struct buffer *inbuffer = XMARKER (readcharfun)->buffer; |
078e7b4a | 234 | |
d311d28c | 235 | ptrdiff_t bytepos = marker_byte_position (readcharfun); |
00a9a935 | 236 | |
bed23cb2 RS |
237 | if (bytepos >= BUF_ZV_BYTE (inbuffer)) |
238 | return -1; | |
6f7f43d5 | 239 | |
4b4deea2 | 240 | if (! NILP (BVAR (inbuffer, enable_multibyte_characters))) |
bed23cb2 | 241 | { |
00a9a935 | 242 | /* Fetch the character code from the buffer. */ |
bed23cb2 RS |
243 | unsigned char *p = BUF_BYTE_ADDRESS (inbuffer, bytepos); |
244 | BUF_INC_POS (inbuffer, bytepos); | |
62a6e103 | 245 | c = STRING_CHAR (p); |
1202434b KH |
246 | if (multibyte) |
247 | *multibyte = 1; | |
bed23cb2 RS |
248 | } |
249 | else | |
250 | { | |
251 | c = BUF_FETCH_BYTE (inbuffer, bytepos); | |
8792be66 KH |
252 | if (! ASCII_BYTE_P (c)) |
253 | c = BYTE8_TO_CHAR (c); | |
bed23cb2 | 254 | bytepos++; |
6f7f43d5 RS |
255 | } |
256 | ||
bed23cb2 RS |
257 | XMARKER (readcharfun)->bytepos = bytepos; |
258 | XMARKER (readcharfun)->charpos++; | |
259 | ||
260 | return c; | |
078e7b4a | 261 | } |
ad0153e4 RS |
262 | |
263 | if (EQ (readcharfun, Qlambda)) | |
8792be66 KH |
264 | { |
265 | readbyte = readbyte_for_lambda; | |
266 | goto read_multibyte; | |
267 | } | |
ad0153e4 | 268 | |
078e7b4a | 269 | if (EQ (readcharfun, Qget_file_char)) |
2c1b5dbe | 270 | { |
8792be66 KH |
271 | readbyte = readbyte_from_file; |
272 | goto read_multibyte; | |
2c1b5dbe | 273 | } |
078e7b4a | 274 | |
cfff016d | 275 | if (STRINGP (readcharfun)) |
078e7b4a | 276 | { |
bed23cb2 | 277 | if (read_from_string_index >= read_from_string_limit) |
078e7b4a | 278 | c = -1; |
1202434b KH |
279 | else if (STRING_MULTIBYTE (readcharfun)) |
280 | { | |
281 | if (multibyte) | |
282 | *multibyte = 1; | |
283 | FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c, readcharfun, | |
284 | read_from_string_index, | |
285 | read_from_string_index_byte); | |
286 | } | |
f0354c03 | 287 | else |
1202434b KH |
288 | { |
289 | c = SREF (readcharfun, read_from_string_index_byte); | |
290 | read_from_string_index++; | |
291 | read_from_string_index_byte++; | |
292 | } | |
078e7b4a JB |
293 | return c; |
294 | } | |
295 | ||
8792be66 KH |
296 | if (CONSP (readcharfun)) |
297 | { | |
298 | /* This is the case that read_vector is reading from a unibyte | |
299 | string that contains a byte sequence previously skipped | |
300 | because of #@NUMBER. The car part of readcharfun is that | |
301 | string, and the cdr part is a value of readcharfun given to | |
302 | read_vector. */ | |
303 | readbyte = readbyte_from_string; | |
304 | if (EQ (XCDR (readcharfun), Qget_emacs_mule_file_char)) | |
305 | emacs_mule_encoding = 1; | |
306 | goto read_multibyte; | |
307 | } | |
8f924df7 | 308 | |
8792be66 KH |
309 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) |
310 | { | |
311 | readbyte = readbyte_from_file; | |
312 | emacs_mule_encoding = 1; | |
313 | goto read_multibyte; | |
314 | } | |
078e7b4a JB |
315 | |
316 | tem = call0 (readcharfun); | |
317 | ||
265a9e55 | 318 | if (NILP (tem)) |
078e7b4a JB |
319 | return -1; |
320 | return XINT (tem); | |
8792be66 KH |
321 | |
322 | read_multibyte: | |
323 | if (unread_char >= 0) | |
324 | { | |
325 | c = unread_char; | |
326 | unread_char = -1; | |
327 | return c; | |
328 | } | |
329 | c = (*readbyte) (-1, readcharfun); | |
1202434b KH |
330 | if (c < 0 || load_each_byte) |
331 | return c; | |
332 | if (multibyte) | |
333 | *multibyte = 1; | |
334 | if (ASCII_BYTE_P (c)) | |
8792be66 KH |
335 | return c; |
336 | if (emacs_mule_encoding) | |
337 | return read_emacs_mule_char (c, readbyte, readcharfun); | |
338 | i = 0; | |
339 | buf[i++] = c; | |
340 | len = BYTES_BY_CHAR_HEAD (c); | |
341 | while (i < len) | |
342 | { | |
343 | c = (*readbyte) (-1, readcharfun); | |
344 | if (c < 0 || ! TRAILING_CODE_P (c)) | |
345 | { | |
346 | while (--i > 1) | |
347 | (*readbyte) (buf[i], readcharfun); | |
348 | return BYTE8_TO_CHAR (buf[0]); | |
349 | } | |
350 | buf[i++] = c; | |
351 | } | |
62a6e103 | 352 | return STRING_CHAR (buf); |
078e7b4a JB |
353 | } |
354 | ||
355 | /* Unread the character C in the way appropriate for the stream READCHARFUN. | |
356 | If the stream is a user function, call it with the char as argument. */ | |
357 | ||
358 | static void | |
971de7fb | 359 | unreadchar (Lisp_Object readcharfun, int c) |
078e7b4a | 360 | { |
abb13b09 | 361 | readchar_count--; |
92fddec9 KH |
362 | if (c == -1) |
363 | /* Don't back up the pointer if we're unreading the end-of-input mark, | |
364 | since readchar didn't advance it when we read it. */ | |
365 | ; | |
cfff016d | 366 | else if (BUFFERP (readcharfun)) |
d7760ca9 | 367 | { |
bed23cb2 | 368 | struct buffer *b = XBUFFER (readcharfun); |
d311d28c PE |
369 | ptrdiff_t charpos = BUF_PT (b); |
370 | ptrdiff_t bytepos = BUF_PT_BYTE (b); | |
d7760ca9 | 371 | |
4b4deea2 | 372 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 373 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 374 | else |
8792be66 | 375 | bytepos--; |
d7760ca9 | 376 | |
cffc6f3b | 377 | SET_BUF_PT_BOTH (b, charpos - 1, bytepos); |
d7760ca9 | 378 | } |
cfff016d | 379 | else if (MARKERP (readcharfun)) |
d7760ca9 | 380 | { |
bed23cb2 | 381 | struct buffer *b = XMARKER (readcharfun)->buffer; |
d311d28c | 382 | ptrdiff_t bytepos = XMARKER (readcharfun)->bytepos; |
d7760ca9 | 383 | |
8792be66 | 384 | XMARKER (readcharfun)->charpos--; |
4b4deea2 | 385 | if (! NILP (BVAR (b, enable_multibyte_characters))) |
8792be66 | 386 | BUF_DEC_POS (b, bytepos); |
bed23cb2 | 387 | else |
8792be66 | 388 | bytepos--; |
d7760ca9 | 389 | |
8792be66 | 390 | XMARKER (readcharfun)->bytepos = bytepos; |
d7760ca9 | 391 | } |
cfff016d | 392 | else if (STRINGP (readcharfun)) |
bed23cb2 RS |
393 | { |
394 | read_from_string_index--; | |
395 | read_from_string_index_byte | |
396 | = string_char_to_byte (readcharfun, read_from_string_index); | |
397 | } | |
8792be66 KH |
398 | else if (CONSP (readcharfun)) |
399 | { | |
400 | unread_char = c; | |
401 | } | |
ad0153e4 | 402 | else if (EQ (readcharfun, Qlambda)) |
8792be66 KH |
403 | { |
404 | unread_char = c; | |
405 | } | |
406 | else if (EQ (readcharfun, Qget_file_char) | |
407 | || EQ (readcharfun, Qget_emacs_mule_file_char)) | |
408 | { | |
409 | if (load_each_byte) | |
d85d3839 | 410 | { |
4d7e6e51 | 411 | block_input (); |
d85d3839 | 412 | ungetc (c, instream); |
4d7e6e51 | 413 | unblock_input (); |
d85d3839 | 414 | } |
8792be66 KH |
415 | else |
416 | unread_char = c; | |
417 | } | |
078e7b4a JB |
418 | else |
419 | call1 (readcharfun, make_number (c)); | |
420 | } | |
421 | ||
8792be66 | 422 | static int |
971de7fb | 423 | readbyte_for_lambda (int c, Lisp_Object readcharfun) |
8792be66 KH |
424 | { |
425 | return read_bytecode_char (c >= 0); | |
426 | } | |
427 | ||
428 | ||
429 | static int | |
971de7fb | 430 | readbyte_from_file (int c, Lisp_Object readcharfun) |
8792be66 KH |
431 | { |
432 | if (c >= 0) | |
433 | { | |
4d7e6e51 | 434 | block_input (); |
8792be66 | 435 | ungetc (c, instream); |
4d7e6e51 | 436 | unblock_input (); |
8792be66 KH |
437 | return 0; |
438 | } | |
439 | ||
4d7e6e51 | 440 | block_input (); |
8792be66 | 441 | c = getc (instream); |
d85d3839 | 442 | |
8792be66 | 443 | #ifdef EINTR |
48def666 | 444 | /* Interrupted reads have been observed while reading over the network. */ |
d85d3839 MB |
445 | while (c == EOF && ferror (instream) && errno == EINTR) |
446 | { | |
4d7e6e51 | 447 | unblock_input (); |
d85d3839 | 448 | QUIT; |
4d7e6e51 | 449 | block_input (); |
57cb2e6f | 450 | clearerr (instream); |
d85d3839 | 451 | c = getc (instream); |
66cd0949 | 452 | } |
8792be66 | 453 | #endif |
d85d3839 | 454 | |
4d7e6e51 | 455 | unblock_input (); |
57cb2e6f | 456 | |
8792be66 KH |
457 | return (c == EOF ? -1 : c); |
458 | } | |
459 | ||
460 | static int | |
971de7fb | 461 | readbyte_from_string (int c, Lisp_Object readcharfun) |
8792be66 KH |
462 | { |
463 | Lisp_Object string = XCAR (readcharfun); | |
464 | ||
465 | if (c >= 0) | |
466 | { | |
467 | read_from_string_index--; | |
468 | read_from_string_index_byte | |
469 | = string_char_to_byte (string, read_from_string_index); | |
470 | } | |
8f924df7 | 471 | |
8792be66 KH |
472 | if (read_from_string_index >= read_from_string_limit) |
473 | c = -1; | |
474 | else | |
475 | FETCH_STRING_CHAR_ADVANCE (c, string, | |
476 | read_from_string_index, | |
477 | read_from_string_index_byte); | |
478 | return c; | |
479 | } | |
480 | ||
481 | ||
482 | /* Read one non-ASCII character from INSTREAM. The character is | |
483 | encoded in `emacs-mule' and the first byte is already read in | |
484 | C. */ | |
485 | ||
8792be66 | 486 | static int |
971de7fb | 487 | read_emacs_mule_char (int c, int (*readbyte) (int, Lisp_Object), Lisp_Object readcharfun) |
8792be66 KH |
488 | { |
489 | /* Emacs-mule coding uses at most 4-byte for one character. */ | |
490 | unsigned char buf[4]; | |
491 | int len = emacs_mule_bytes[c]; | |
492 | struct charset *charset; | |
493 | int i; | |
494 | unsigned code; | |
495 | ||
496 | if (len == 1) | |
497 | /* C is not a valid leading-code of `emacs-mule'. */ | |
498 | return BYTE8_TO_CHAR (c); | |
499 | ||
500 | i = 0; | |
501 | buf[i++] = c; | |
502 | while (i < len) | |
503 | { | |
504 | c = (*readbyte) (-1, readcharfun); | |
505 | if (c < 0xA0) | |
506 | { | |
507 | while (--i > 1) | |
508 | (*readbyte) (buf[i], readcharfun); | |
509 | return BYTE8_TO_CHAR (buf[0]); | |
510 | } | |
511 | buf[i++] = c; | |
512 | } | |
513 | ||
514 | if (len == 2) | |
515 | { | |
b84ae584 | 516 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
517 | code = buf[1] & 0x7F; |
518 | } | |
519 | else if (len == 3) | |
520 | { | |
521 | if (buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11 | |
522 | || buf[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
523 | { | |
b84ae584 | 524 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8792be66 KH |
525 | code = buf[2] & 0x7F; |
526 | } | |
527 | else | |
528 | { | |
b84ae584 | 529 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[0]]); |
8792be66 KH |
530 | code = ((buf[1] << 8) | buf[2]) & 0x7F7F; |
531 | } | |
532 | } | |
533 | else | |
534 | { | |
b84ae584 | 535 | charset = CHARSET_FROM_ID (emacs_mule_charset[buf[1]]); |
8f924df7 | 536 | code = ((buf[2] << 8) | buf[3]) & 0x7F7F; |
8792be66 KH |
537 | } |
538 | c = DECODE_CHAR (charset, code); | |
539 | if (c < 0) | |
540 | Fsignal (Qinvalid_read_syntax, | |
541 | Fcons (build_string ("invalid multibyte form"), Qnil)); | |
542 | return c; | |
543 | } | |
544 | ||
545 | ||
f57e2426 J |
546 | static Lisp_Object read_internal_start (Lisp_Object, Lisp_Object, |
547 | Lisp_Object); | |
548 | static Lisp_Object read0 (Lisp_Object); | |
549 | static Lisp_Object read1 (Lisp_Object, int *, int); | |
abb13b09 | 550 | |
f57e2426 J |
551 | static Lisp_Object read_list (int, Lisp_Object); |
552 | static Lisp_Object read_vector (Lisp_Object, int); | |
abb13b09 | 553 | |
f57e2426 J |
554 | static Lisp_Object substitute_object_recurse (Lisp_Object, Lisp_Object, |
555 | Lisp_Object); | |
556 | static void substitute_object_in_subtree (Lisp_Object, | |
557 | Lisp_Object); | |
558 | static void substitute_in_interval (INTERVAL, Lisp_Object); | |
9e062b6c | 559 | |
078e7b4a | 560 | \f |
bed23cb2 | 561 | /* Get a character from the tty. */ |
078e7b4a | 562 | |
f42be754 JB |
563 | /* Read input events until we get one that's acceptable for our purposes. |
564 | ||
565 | If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed | |
566 | until we get a character we like, and then stuffed into | |
567 | unread_switch_frame. | |
568 | ||
569 | If ASCII_REQUIRED is non-zero, we check function key events to see | |
570 | if the unmodified version of the symbol has a Qascii_character | |
571 | property, and use that character, if present. | |
572 | ||
573 | If ERROR_NONASCII is non-zero, we signal an error if the input we | |
574 | get isn't an ASCII character with modifiers. If it's zero but | |
575 | ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII | |
bb49a192 RS |
576 | character. |
577 | ||
578 | If INPUT_METHOD is nonzero, we invoke the current input method | |
50e48299 CY |
579 | if the character warrants that. |
580 | ||
581 | If SECONDS is a number, we wait that many seconds for input, and | |
582 | return Qnil if no input arrives within that time. */ | |
cc39bc38 | 583 | |
2f7c71a1 | 584 | static Lisp_Object |
d5a3eaaf AS |
585 | read_filtered_event (int no_switch_frame, int ascii_required, |
586 | int error_nonascii, int input_method, Lisp_Object seconds) | |
f42be754 | 587 | { |
4332cf50 | 588 | Lisp_Object val, delayed_switch_frame; |
50e48299 | 589 | EMACS_TIME end_time; |
153a17b7 | 590 | |
5dbf89bc | 591 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
592 | if (display_hourglass_p) |
593 | cancel_hourglass (); | |
5dbf89bc | 594 | #endif |
177c0ea7 | 595 | |
153a17b7 | 596 | delayed_switch_frame = Qnil; |
f42be754 | 597 | |
50e48299 CY |
598 | /* Compute timeout. */ |
599 | if (NUMBERP (seconds)) | |
600 | { | |
51d8b30e | 601 | double duration = extract_float (seconds); |
d35af63c | 602 | EMACS_TIME wait_time = EMACS_TIME_FROM_DOUBLE (duration); |
e9a9ae03 | 603 | end_time = add_emacs_time (current_emacs_time (), wait_time); |
50e48299 CY |
604 | } |
605 | ||
251bc578 | 606 | /* Read until we get an acceptable event. */ |
f42be754 | 607 | retry: |
88852d45 | 608 | do |
251bc578 KL |
609 | val = read_char (0, 0, 0, (input_method ? Qnil : Qt), 0, |
610 | NUMBERP (seconds) ? &end_time : NULL); | |
9688ff53 | 611 | while (INTEGERP (val) && XINT (val) == -2); /* wrong_kboard_jmpbuf */ |
f42be754 | 612 | |
cfff016d | 613 | if (BUFFERP (val)) |
6c82d689 KH |
614 | goto retry; |
615 | ||
f42be754 | 616 | /* switch-frame events are put off until after the next ASCII |
8e6208c5 | 617 | character. This is better than signaling an error just because |
f42be754 JB |
618 | the last characters were typed to a separate minibuffer frame, |
619 | for example. Eventually, some code which can deal with | |
620 | switch-frame events will read it and process it. */ | |
621 | if (no_switch_frame | |
622 | && EVENT_HAS_PARAMETERS (val) | |
ca77ee45 | 623 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val)), Qswitch_frame)) |
f42be754 JB |
624 | { |
625 | delayed_switch_frame = val; | |
626 | goto retry; | |
627 | } | |
628 | ||
50e48299 | 629 | if (ascii_required && !(NUMBERP (seconds) && NILP (val))) |
f42be754 JB |
630 | { |
631 | /* Convert certain symbols to their ASCII equivalents. */ | |
cfff016d | 632 | if (SYMBOLP (val)) |
f42be754 | 633 | { |
95384e1e | 634 | Lisp_Object tem, tem1; |
f42be754 JB |
635 | tem = Fget (val, Qevent_symbol_element_mask); |
636 | if (!NILP (tem)) | |
637 | { | |
638 | tem1 = Fget (Fcar (tem), Qascii_character); | |
639 | /* Merge this symbol's modifier bits | |
640 | with the ASCII equivalent of its basic code. */ | |
641 | if (!NILP (tem1)) | |
baf69866 | 642 | XSETFASTINT (val, XINT (tem1) | XINT (Fcar (Fcdr (tem)))); |
f42be754 JB |
643 | } |
644 | } | |
177c0ea7 | 645 | |
f42be754 | 646 | /* If we don't have a character now, deal with it appropriately. */ |
cfff016d | 647 | if (!INTEGERP (val)) |
f42be754 JB |
648 | { |
649 | if (error_nonascii) | |
650 | { | |
1ec84625 | 651 | Vunread_command_events = Fcons (val, Qnil); |
f42be754 JB |
652 | error ("Non-character input-event"); |
653 | } | |
654 | else | |
655 | goto retry; | |
656 | } | |
657 | } | |
658 | ||
659 | if (! NILP (delayed_switch_frame)) | |
660 | unread_switch_frame = delayed_switch_frame; | |
661 | ||
67868d27 PJ |
662 | #if 0 |
663 | ||
5dbf89bc | 664 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
665 | if (display_hourglass_p) |
666 | start_hourglass (); | |
5dbf89bc | 667 | #endif |
67868d27 PJ |
668 | |
669 | #endif | |
670 | ||
f42be754 | 671 | return val; |
f42be754 JB |
672 | } |
673 | ||
a7ca3326 | 674 | DEFUN ("read-char", Fread_char, Sread_char, 0, 3, 0, |
5de38842 PJ |
675 | doc: /* Read a character from the command input (keyboard or macro). |
676 | It is returned as a number. | |
fb26c2af KH |
677 | If the character has modifiers, they are resolved and reflected to the |
678 | character code if possible (e.g. C-SPC -> 0). | |
679 | ||
5de38842 PJ |
680 | If the user generates an event which is not a character (i.e. a mouse |
681 | click or function key event), `read-char' signals an error. As an | |
fb26c2af KH |
682 | exception, switch-frame events are put off until non-character events |
683 | can be read. | |
5de38842 PJ |
684 | If you want to read non-character events, or ignore them, call |
685 | `read-event' or `read-char-exclusive' instead. | |
686 | ||
687 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
688 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
689 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
690 | is used for reading a character. |
691 | If the optional argument SECONDS is non-nil, it should be a number | |
692 | specifying the maximum number of seconds to wait for input. If no | |
693 | input arrives in that time, return nil. SECONDS may be a | |
694 | floating-point value. */) | |
5842a27b | 695 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 696 | { |
fb26c2af | 697 | Lisp_Object val; |
fb26c2af | 698 | |
bb49a192 RS |
699 | if (! NILP (prompt)) |
700 | message_with_string ("%s", prompt, 0); | |
fb26c2af | 701 | val = read_filtered_event (1, 1, 1, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
702 | |
703 | return (NILP (val) ? Qnil | |
704 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a JB |
705 | } |
706 | ||
a7ca3326 | 707 | DEFUN ("read-event", Fread_event, Sread_event, 0, 3, 0, |
5de38842 PJ |
708 | doc: /* Read an event object from the input stream. |
709 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
710 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
711 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
712 | is used for reading a character. |
713 | If the optional argument SECONDS is non-nil, it should be a number | |
714 | specifying the maximum number of seconds to wait for input. If no | |
715 | input arrives in that time, return nil. SECONDS may be a | |
716 | floating-point value. */) | |
5842a27b | 717 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 718 | { |
bb49a192 RS |
719 | if (! NILP (prompt)) |
720 | message_with_string ("%s", prompt, 0); | |
50e48299 | 721 | return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method), seconds); |
078e7b4a JB |
722 | } |
723 | ||
50e48299 | 724 | DEFUN ("read-char-exclusive", Fread_char_exclusive, Sread_char_exclusive, 0, 3, 0, |
5de38842 PJ |
725 | doc: /* Read a character from the command input (keyboard or macro). |
726 | It is returned as a number. Non-character events are ignored. | |
fb26c2af KH |
727 | If the character has modifiers, they are resolved and reflected to the |
728 | character code if possible (e.g. C-SPC -> 0). | |
5de38842 PJ |
729 | |
730 | If the optional argument PROMPT is non-nil, display that as a prompt. | |
731 | If the optional argument INHERIT-INPUT-METHOD is non-nil and some | |
732 | input method is turned on in the current buffer, that input method | |
50e48299 CY |
733 | is used for reading a character. |
734 | If the optional argument SECONDS is non-nil, it should be a number | |
735 | specifying the maximum number of seconds to wait for input. If no | |
736 | input arrives in that time, return nil. SECONDS may be a | |
737 | floating-point value. */) | |
5842a27b | 738 | (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds) |
078e7b4a | 739 | { |
fb26c2af | 740 | Lisp_Object val; |
fb26c2af | 741 | |
bb49a192 RS |
742 | if (! NILP (prompt)) |
743 | message_with_string ("%s", prompt, 0); | |
66c410ce | 744 | |
fb26c2af | 745 | val = read_filtered_event (1, 1, 0, ! NILP (inherit_input_method), seconds); |
66c410ce CY |
746 | |
747 | return (NILP (val) ? Qnil | |
748 | : make_number (char_resolve_modifier_mask (XINT (val)))); | |
078e7b4a | 749 | } |
078e7b4a JB |
750 | |
751 | DEFUN ("get-file-char", Fget_file_char, Sget_file_char, 0, 0, 0, | |
5de38842 | 752 | doc: /* Don't use this yourself. */) |
5842a27b | 753 | (void) |
078e7b4a JB |
754 | { |
755 | register Lisp_Object val; | |
4d7e6e51 | 756 | block_input (); |
1805de4f | 757 | XSETINT (val, getc (instream)); |
4d7e6e51 | 758 | unblock_input (); |
078e7b4a JB |
759 | return val; |
760 | } | |
da84f340 GM |
761 | |
762 | ||
550a625e | 763 | \f |
b9598260 SM |
764 | |
765 | /* Return true if the lisp code read using READCHARFUN defines a non-nil | |
766 | `lexical-binding' file variable. After returning, the stream is | |
757140ff GM |
767 | positioned following the first line, if it is a comment or #! line, |
768 | otherwise nothing is read. */ | |
b9598260 SM |
769 | |
770 | static int | |
c566235d | 771 | lisp_file_lexically_bound_p (Lisp_Object readcharfun) |
b9598260 SM |
772 | { |
773 | int ch = READCHAR; | |
757140ff GM |
774 | |
775 | if (ch == '#') | |
776 | { | |
777 | ch = READCHAR; | |
778 | if (ch != '!') | |
779 | { | |
780 | UNREAD (ch); | |
781 | UNREAD ('#'); | |
782 | return 0; | |
783 | } | |
784 | while (ch != '\n' && ch != EOF) | |
785 | ch = READCHAR; | |
786 | if (ch == '\n') ch = READCHAR; | |
d2dd3694 GM |
787 | /* It is OK to leave the position after a #! line, since |
788 | that is what read1 does. */ | |
757140ff GM |
789 | } |
790 | ||
b9598260 SM |
791 | if (ch != ';') |
792 | /* The first line isn't a comment, just give up. */ | |
793 | { | |
794 | UNREAD (ch); | |
795 | return 0; | |
796 | } | |
797 | else | |
798 | /* Look for an appropriate file-variable in the first line. */ | |
799 | { | |
800 | int rv = 0; | |
801 | enum { | |
802 | NOMINAL, AFTER_FIRST_DASH, AFTER_ASTERIX, | |
803 | } beg_end_state = NOMINAL; | |
804 | int in_file_vars = 0; | |
805 | ||
7200d79c SM |
806 | #define UPDATE_BEG_END_STATE(ch) \ |
807 | if (beg_end_state == NOMINAL) \ | |
808 | beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \ | |
809 | else if (beg_end_state == AFTER_FIRST_DASH) \ | |
810 | beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \ | |
811 | else if (beg_end_state == AFTER_ASTERIX) \ | |
812 | { \ | |
813 | if (ch == '-') \ | |
814 | in_file_vars = !in_file_vars; \ | |
815 | beg_end_state = NOMINAL; \ | |
b9598260 SM |
816 | } |
817 | ||
818 | /* Skip until we get to the file vars, if any. */ | |
819 | do | |
820 | { | |
821 | ch = READCHAR; | |
822 | UPDATE_BEG_END_STATE (ch); | |
823 | } | |
824 | while (!in_file_vars && ch != '\n' && ch != EOF); | |
825 | ||
826 | while (in_file_vars) | |
827 | { | |
06a0259a | 828 | char var[100], val[100]; |
3c346cc3 | 829 | unsigned i; |
b9598260 SM |
830 | |
831 | ch = READCHAR; | |
832 | ||
833 | /* Read a variable name. */ | |
834 | while (ch == ' ' || ch == '\t') | |
835 | ch = READCHAR; | |
836 | ||
06a0259a | 837 | i = 0; |
db7a0b4f | 838 | while (ch != ':' && ch != '\n' && ch != EOF && in_file_vars) |
b9598260 | 839 | { |
06a0259a PE |
840 | if (i < sizeof var - 1) |
841 | var[i++] = ch; | |
b9598260 SM |
842 | UPDATE_BEG_END_STATE (ch); |
843 | ch = READCHAR; | |
844 | } | |
7200d79c | 845 | |
db7a0b4f | 846 | /* Stop scanning if no colon was found before end marker. */ |
ad3a2b41 | 847 | if (!in_file_vars || ch == '\n' || ch == EOF) |
db7a0b4f AS |
848 | break; |
849 | ||
06a0259a PE |
850 | while (i > 0 && (var[i - 1] == ' ' || var[i - 1] == '\t')) |
851 | i--; | |
852 | var[i] = '\0'; | |
b9598260 SM |
853 | |
854 | if (ch == ':') | |
855 | { | |
856 | /* Read a variable value. */ | |
857 | ch = READCHAR; | |
858 | ||
859 | while (ch == ' ' || ch == '\t') | |
860 | ch = READCHAR; | |
861 | ||
06a0259a | 862 | i = 0; |
b9598260 SM |
863 | while (ch != ';' && ch != '\n' && ch != EOF && in_file_vars) |
864 | { | |
06a0259a PE |
865 | if (i < sizeof val - 1) |
866 | val[i++] = ch; | |
b9598260 SM |
867 | UPDATE_BEG_END_STATE (ch); |
868 | ch = READCHAR; | |
869 | } | |
870 | if (! in_file_vars) | |
ad3a2b41 | 871 | /* The value was terminated by an end-marker, which remove. */ |
06a0259a PE |
872 | i -= 3; |
873 | while (i > 0 && (val[i - 1] == ' ' || val[i - 1] == '\t')) | |
874 | i--; | |
875 | val[i] = '\0'; | |
b9598260 SM |
876 | |
877 | if (strcmp (var, "lexical-binding") == 0) | |
878 | /* This is it... */ | |
879 | { | |
880 | rv = (strcmp (val, "nil") != 0); | |
881 | break; | |
882 | } | |
883 | } | |
884 | } | |
885 | ||
886 | while (ch != '\n' && ch != EOF) | |
887 | ch = READCHAR; | |
888 | ||
889 | return rv; | |
890 | } | |
891 | } | |
b9598260 | 892 | \f |
8792be66 | 893 | /* Value is a version number of byte compiled code if the file |
c73bd236 | 894 | associated with file descriptor FD is a compiled Lisp file that's |
8792be66 KH |
895 | safe to load. Only files compiled with Emacs are safe to load. |
896 | Files compiled with XEmacs can lead to a crash in Fbyte_code | |
897 | because of an incompatible change in the byte compiler. */ | |
da84f340 GM |
898 | |
899 | static int | |
971de7fb | 900 | safe_to_load_p (int fd) |
da84f340 GM |
901 | { |
902 | char buf[512]; | |
903 | int nbytes, i; | |
904 | int safe_p = 1; | |
8f924df7 | 905 | int version = 1; |
da84f340 GM |
906 | |
907 | /* Read the first few bytes from the file, and look for a line | |
908 | specifying the byte compiler version used. */ | |
909 | nbytes = emacs_read (fd, buf, sizeof buf - 1); | |
910 | if (nbytes > 0) | |
911 | { | |
912 | buf[nbytes] = '\0'; | |
913 | ||
914 | /* Skip to the next newline, skipping over the initial `ELC' | |
1da3b9e4 | 915 | with NUL bytes following it, but note the version. */ |
da84f340 | 916 | for (i = 0; i < nbytes && buf[i] != '\n'; ++i) |
1da3b9e4 | 917 | if (i == 4) |
8792be66 | 918 | version = buf[i]; |
da84f340 | 919 | |
e6eb4e9e | 920 | if (i >= nbytes |
927f12da | 921 | || fast_c_string_match_ignore_case (Vbytecomp_version_regexp, |
d923b542 | 922 | buf + i, nbytes - i) < 0) |
da84f340 GM |
923 | safe_p = 0; |
924 | } | |
1da3b9e4 DL |
925 | if (safe_p) |
926 | safe_p = version; | |
da84f340 GM |
927 | |
928 | lseek (fd, 0, SEEK_SET); | |
929 | return safe_p; | |
930 | } | |
931 | ||
932 | ||
7ee3bd7b GM |
933 | /* Callback for record_unwind_protect. Restore the old load list OLD, |
934 | after loading a file successfully. */ | |
935 | ||
936 | static Lisp_Object | |
971de7fb | 937 | record_load_unwind (Lisp_Object old) |
7ee3bd7b GM |
938 | { |
939 | return Vloads_in_progress = old; | |
940 | } | |
941 | ||
164c8bfe RS |
942 | /* This handler function is used via internal_condition_case_1. */ |
943 | ||
944 | static Lisp_Object | |
971de7fb | 945 | load_error_handler (Lisp_Object data) |
164c8bfe RS |
946 | { |
947 | return Qnil; | |
948 | } | |
7ee3bd7b | 949 | |
1d064697 | 950 | static Lisp_Object |
971de7fb | 951 | load_warn_old_style_backquotes (Lisp_Object file) |
1d064697 SM |
952 | { |
953 | if (!NILP (Vold_style_backquotes)) | |
954 | { | |
b636b4c1 | 955 | Lisp_Object args[2]; |
18a4a65e | 956 | args[0] = build_string ("Loading `%s': old-style backquotes detected!"); |
1d064697 SM |
957 | args[1] = file; |
958 | Fmessage (2, args); | |
959 | } | |
960 | return Qnil; | |
961 | } | |
962 | ||
a7ca3326 | 963 | DEFUN ("get-load-suffixes", Fget_load_suffixes, Sget_load_suffixes, 0, 0, 0, |
971a4293 LT |
964 | doc: /* Return the suffixes that `load' should try if a suffix is \ |
965 | required. | |
966 | This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */) | |
5842a27b | 967 | (void) |
971a4293 LT |
968 | { |
969 | Lisp_Object lst = Qnil, suffixes = Vload_suffixes, suffix, ext; | |
970 | while (CONSP (suffixes)) | |
971 | { | |
972 | Lisp_Object exts = Vload_file_rep_suffixes; | |
973 | suffix = XCAR (suffixes); | |
974 | suffixes = XCDR (suffixes); | |
975 | while (CONSP (exts)) | |
976 | { | |
977 | ext = XCAR (exts); | |
978 | exts = XCDR (exts); | |
979 | lst = Fcons (concat2 (suffix, ext), lst); | |
980 | } | |
981 | } | |
982 | return Fnreverse (lst); | |
983 | } | |
984 | ||
a7ca3326 | 985 | DEFUN ("load", Fload, Sload, 1, 5, 0, |
5de38842 PJ |
986 | doc: /* Execute a file of Lisp code named FILE. |
987 | First try FILE with `.elc' appended, then try with `.el', | |
971a4293 | 988 | then try FILE unmodified (the exact suffixes in the exact order are |
88852d45 | 989 | determined by `load-suffixes'). Environment variable references in |
971a4293 | 990 | FILE are replaced with their values by calling `substitute-in-file-name'. |
5de38842 | 991 | This function searches the directories in `load-path'. |
971a4293 | 992 | |
5de38842 | 993 | If optional second arg NOERROR is non-nil, |
971a4293 | 994 | report no error if FILE doesn't exist. |
5de38842 | 995 | Print messages at start and end of loading unless |
beb0b7f9 EZ |
996 | optional third arg NOMESSAGE is non-nil (but `force-load-messages' |
997 | overrides that). | |
5de38842 | 998 | If optional fourth arg NOSUFFIX is non-nil, don't try adding |
971a4293 | 999 | suffixes `.elc' or `.el' to the specified name FILE. |
5de38842 | 1000 | If optional fifth arg MUST-SUFFIX is non-nil, insist on |
971a4293 LT |
1001 | the suffix `.elc' or `.el'; don't accept just FILE unless |
1002 | it ends in one of those suffixes or includes a directory name. | |
1003 | ||
1004 | If this function fails to find a file, it may look for different | |
1005 | representations of that file before trying another file. | |
1006 | It does so by adding the non-empty suffixes in `load-file-rep-suffixes' | |
1007 | to the file name. Emacs uses this feature mainly to find compressed | |
1008 | versions of files when Auto Compression mode is enabled. | |
1009 | ||
1010 | The exact suffixes that this function tries out, in the exact order, | |
1011 | are given by the value of the variable `load-file-rep-suffixes' if | |
1012 | NOSUFFIX is non-nil and by the return value of the function | |
1013 | `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and | |
1014 | MUST-SUFFIX are nil, this function first tries out the latter suffixes | |
1015 | and then the former. | |
0fc213e9 RS |
1016 | |
1017 | Loading a file records its definitions, and its `provide' and | |
1018 | `require' calls, in an element of `load-history' whose | |
1019 | car is the file name loaded. See `load-history'. | |
1020 | ||
c7926fe2 EZ |
1021 | While the file is in the process of being loaded, the variable |
1022 | `load-in-progress' is non-nil and the variable `load-file-name' | |
1023 | is bound to the file's name. | |
1024 | ||
971a4293 | 1025 | Return t if the file exists and loads successfully. */) |
5842a27b | 1026 | (Lisp_Object file, Lisp_Object noerror, Lisp_Object nomessage, Lisp_Object nosuffix, Lisp_Object must_suffix) |
078e7b4a JB |
1027 | { |
1028 | register FILE *stream; | |
1029 | register int fd = -1; | |
d311d28c | 1030 | ptrdiff_t count = SPECPDL_INDEX (); |
6bb6da3e AM |
1031 | struct gcpro gcpro1, gcpro2, gcpro3; |
1032 | Lisp_Object found, efound, hist_file_name; | |
04fc68e7 RS |
1033 | /* 1 means we printed the ".el is newer" message. */ |
1034 | int newer = 0; | |
1035 | /* 1 means we are loading a compiled file. */ | |
1036 | int compiled = 0; | |
c2225d00 | 1037 | Lisp_Object handler; |
456c67a4 | 1038 | int safe_p = 1; |
8ea90aa3 | 1039 | const char *fmode = "r"; |
6bb6da3e | 1040 | Lisp_Object tmp[2]; |
8792be66 KH |
1041 | int version; |
1042 | ||
317073d5 | 1043 | #ifdef DOS_NT |
229ba775 | 1044 | fmode = "rt"; |
317073d5 | 1045 | #endif /* DOS_NT */ |
078e7b4a | 1046 | |
b7826503 | 1047 | CHECK_STRING (file); |
078e7b4a | 1048 | |
c2225d00 | 1049 | /* If file name is magic, call the handler. */ |
e61b9b87 SM |
1050 | /* This shouldn't be necessary any more now that `openp' handles it right. |
1051 | handler = Ffind_file_name_handler (file, Qload); | |
1052 | if (!NILP (handler)) | |
1053 | return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */ | |
c2225d00 | 1054 | |
07a0bda3 RS |
1055 | /* Do this after the handler to avoid |
1056 | the need to gcpro noerror, nomessage and nosuffix. | |
e61b9b87 SM |
1057 | (Below here, we care only whether they are nil or not.) |
1058 | The presence of this call is the result of a historical accident: | |
6bb6da3e | 1059 | it used to be in every file-operation and when it got removed |
e61b9b87 SM |
1060 | everywhere, it accidentally stayed here. Since then, enough people |
1061 | supposedly have things like (load "$PROJECT/foo.el") in their .emacs | |
1062 | that it seemed risky to remove. */ | |
164c8bfe RS |
1063 | if (! NILP (noerror)) |
1064 | { | |
1065 | file = internal_condition_case_1 (Fsubstitute_in_file_name, file, | |
1066 | Qt, load_error_handler); | |
1067 | if (NILP (file)) | |
1068 | return Qnil; | |
1069 | } | |
1070 | else | |
1071 | file = Fsubstitute_in_file_name (file); | |
177c0ea7 | 1072 | |
07a0bda3 | 1073 | |
078e7b4a | 1074 | /* Avoid weird lossage with null string as arg, |
48def666 | 1075 | since it would try to load a directory as a Lisp file. */ |
82cb60d3 | 1076 | if (SBYTES (file) > 0) |
078e7b4a | 1077 | { |
82cb60d3 | 1078 | ptrdiff_t size = SBYTES (file); |
211f7dcd | 1079 | |
0fc213e9 RS |
1080 | found = Qnil; |
1081 | GCPRO2 (file, found); | |
211f7dcd RS |
1082 | |
1083 | if (! NILP (must_suffix)) | |
1084 | { | |
1085 | /* Don't insist on adding a suffix if FILE already ends with one. */ | |
1086 | if (size > 3 | |
42a5b22f | 1087 | && !strcmp (SSDATA (file) + size - 3, ".el")) |
211f7dcd RS |
1088 | must_suffix = Qnil; |
1089 | else if (size > 4 | |
42a5b22f | 1090 | && !strcmp (SSDATA (file) + size - 4, ".elc")) |
211f7dcd RS |
1091 | must_suffix = Qnil; |
1092 | /* Don't insist on adding a suffix | |
1093 | if the argument includes a directory name. */ | |
1094 | else if (! NILP (Ffile_name_directory (file))) | |
1095 | must_suffix = Qnil; | |
1096 | } | |
1097 | ||
f0a50954 | 1098 | fd = openp (Vload_path, file, |
e61b9b87 | 1099 | (!NILP (nosuffix) ? Qnil |
971a4293 LT |
1100 | : !NILP (must_suffix) ? Fget_load_suffixes () |
1101 | : Fappend (2, (tmp[0] = Fget_load_suffixes (), | |
1102 | tmp[1] = Vload_file_rep_suffixes, | |
e61b9b87 | 1103 | tmp))), |
86d00812 | 1104 | &found, Qnil); |
5a6e5452 | 1105 | UNGCPRO; |
078e7b4a JB |
1106 | } |
1107 | ||
96dc0f4e | 1108 | if (fd == -1) |
078e7b4a | 1109 | { |
265a9e55 | 1110 | if (NILP (noerror)) |
336d4a9c KS |
1111 | xsignal2 (Qfile_error, build_string ("Cannot open load file"), file); |
1112 | return Qnil; | |
078e7b4a JB |
1113 | } |
1114 | ||
ba0d1195 | 1115 | /* Tell startup.el whether or not we found the user's init file. */ |
4116ab9f KH |
1116 | if (EQ (Qt, Vuser_init_file)) |
1117 | Vuser_init_file = found; | |
1118 | ||
96dc0f4e MB |
1119 | /* If FD is -2, that means openp found a magic file. */ |
1120 | if (fd == -2) | |
74549846 | 1121 | { |
5e24a1f7 KH |
1122 | if (NILP (Fequal (found, file))) |
1123 | /* If FOUND is a different file name from FILE, | |
1124 | find its handler even if we have already inhibited | |
1125 | the `load' operation on FILE. */ | |
1126 | handler = Ffind_file_name_handler (found, Qt); | |
1127 | else | |
1128 | handler = Ffind_file_name_handler (found, Qload); | |
1129 | if (! NILP (handler)) | |
1130 | return call5 (handler, Qload, found, noerror, nomessage, Qt); | |
35774242 EZ |
1131 | #ifdef DOS_NT |
1132 | /* Tramp has to deal with semi-broken packages that prepend | |
1133 | drive letters to remote files. For that reason, Tramp | |
1134 | catches file operations that test for file existence, which | |
1135 | makes openp think X:/foo.elc files are remote. However, | |
1136 | Tramp does not catch `load' operations for such files, so we | |
1137 | end up with a nil as the `load' handler above. If we would | |
1138 | continue with fd = -2, we will behave wrongly, and in | |
1139 | particular try reading a .elc file in the "rt" mode instead | |
1140 | of "rb". See bug #9311 for the results. To work around | |
1141 | this, we try to open the file locally, and go with that if it | |
1142 | succeeds. */ | |
1143 | fd = emacs_open (SSDATA (ENCODE_FILE (found)), O_RDONLY, 0); | |
1144 | if (fd == -1) | |
1145 | fd = -2; | |
1146 | #endif | |
74549846 RS |
1147 | } |
1148 | ||
550a625e GM |
1149 | /* Check if we're stuck in a recursive load cycle. |
1150 | ||
1151 | 2000-09-21: It's not possible to just check for the file loaded | |
1152 | being a member of Vloads_in_progress. This fails because of the | |
1153 | way the byte compiler currently works; `provide's are not | |
9d438325 | 1154 | evaluated, see font-lock.el/jit-lock.el as an example. This |
550a625e GM |
1155 | leads to a certain amount of ``normal'' recursion. |
1156 | ||
1157 | Also, just loading a file recursively is not always an error in | |
1158 | the general case; the second load may do something different. */ | |
3ba6fd9a | 1159 | { |
0902fe45 | 1160 | int load_count = 0; |
3ba6fd9a RS |
1161 | Lisp_Object tem; |
1162 | for (tem = Vloads_in_progress; CONSP (tem); tem = XCDR (tem)) | |
0902fe45 | 1163 | if (!NILP (Fequal (found, XCAR (tem))) && (++load_count > 3)) |
8fc45744 JB |
1164 | { |
1165 | if (fd >= 0) | |
1166 | emacs_close (fd); | |
1167 | signal_error ("Recursive load", Fcons (found, Vloads_in_progress)); | |
1168 | } | |
3ba6fd9a RS |
1169 | record_unwind_protect (record_load_unwind, Vloads_in_progress); |
1170 | Vloads_in_progress = Fcons (found, Vloads_in_progress); | |
1171 | } | |
7ee3bd7b | 1172 | |
b9598260 SM |
1173 | /* All loads are by default dynamic, unless the file itself specifies |
1174 | otherwise using a file-variable in the first line. This is bound here | |
1175 | so that it takes effect whether or not we use | |
1176 | Vload_source_file_function. */ | |
1177 | specbind (Qlexical_binding, Qnil); | |
1178 | ||
48def666 | 1179 | /* Get the name for load-history. */ |
6bb6da3e AM |
1180 | hist_file_name = (! NILP (Vpurify_flag) |
1181 | ? Fconcat (2, (tmp[0] = Ffile_name_directory (file), | |
1182 | tmp[1] = Ffile_name_nondirectory (found), | |
1183 | tmp)) | |
1184 | : found) ; | |
1185 | ||
8792be66 | 1186 | version = -1; |
1bb9a689 | 1187 | |
88852d45 | 1188 | /* Check for the presence of old-style quotes and warn about them. */ |
1d064697 SM |
1189 | specbind (Qold_style_backquotes, Qnil); |
1190 | record_unwind_protect (load_warn_old_style_backquotes, file); | |
1191 | ||
72af86bd | 1192 | if (!memcmp (SDATA (found) + SBYTES (found) - 4, ".elc", 4) |
74327f7a | 1193 | || (fd >= 0 && (version = safe_to_load_p (fd)) > 0)) |
96dc0f4e MB |
1194 | /* Load .elc files directly, but not when they are |
1195 | remote and have no handler! */ | |
078e7b4a | 1196 | { |
96dc0f4e | 1197 | if (fd != -2) |
da84f340 | 1198 | { |
96dc0f4e MB |
1199 | struct stat s1, s2; |
1200 | int result; | |
da84f340 | 1201 | |
6bb6da3e | 1202 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1203 | |
8792be66 KH |
1204 | if (version < 0 |
1205 | && ! (version = safe_to_load_p (fd))) | |
96dc0f4e MB |
1206 | { |
1207 | safe_p = 0; | |
1208 | if (!load_dangerous_libraries) | |
e63304b7 DL |
1209 | { |
1210 | if (fd >= 0) | |
1211 | emacs_close (fd); | |
1212 | error ("File `%s' was not compiled in Emacs", | |
1213 | SDATA (found)); | |
1214 | } | |
beb0b7f9 | 1215 | else if (!NILP (nomessage) && !force_load_messages) |
96dc0f4e MB |
1216 | message_with_string ("File `%s' not compiled in Emacs", found, 1); |
1217 | } | |
04fc68e7 | 1218 | |
96dc0f4e MB |
1219 | compiled = 1; |
1220 | ||
eb191db2 EZ |
1221 | efound = ENCODE_FILE (found); |
1222 | ||
26fbf20b | 1223 | #ifdef DOS_NT |
96dc0f4e | 1224 | fmode = "rb"; |
26fbf20b | 1225 | #endif /* DOS_NT */ |
e5533da6 PE |
1226 | result = stat (SSDATA (efound), &s1); |
1227 | if (result == 0) | |
1228 | { | |
1229 | SSET (efound, SBYTES (efound) - 1, 0); | |
1230 | result = stat (SSDATA (efound), &s2); | |
1231 | SSET (efound, SBYTES (efound) - 1, 'c'); | |
1232 | } | |
eb191db2 | 1233 | |
39adff0d PE |
1234 | if (result == 0 |
1235 | && EMACS_TIME_LT (get_stat_mtime (&s1), get_stat_mtime (&s2))) | |
96dc0f4e MB |
1236 | { |
1237 | /* Make the progress messages mention that source is newer. */ | |
1238 | newer = 1; | |
04fc68e7 | 1239 | |
96dc0f4e | 1240 | /* If we won't print another message, mention this anyway. */ |
beb0b7f9 | 1241 | if (!NILP (nomessage) && !force_load_messages) |
714d8c39 | 1242 | { |
0fc213e9 RS |
1243 | Lisp_Object msg_file; |
1244 | msg_file = Fsubstring (found, make_number (0), make_number (-1)); | |
714d8c39 | 1245 | message_with_string ("Source file `%s' newer than byte-compiled file", |
0fc213e9 | 1246 | msg_file, 1); |
714d8c39 | 1247 | } |
96dc0f4e | 1248 | } |
0fc213e9 | 1249 | UNGCPRO; |
51ac6f83 | 1250 | } |
078e7b4a | 1251 | } |
fe0e03f3 KH |
1252 | else |
1253 | { | |
1254 | /* We are loading a source file (*.el). */ | |
1255 | if (!NILP (Vload_source_file_function)) | |
1256 | { | |
7ee3bd7b | 1257 | Lisp_Object val; |
96dc0f4e MB |
1258 | |
1259 | if (fd >= 0) | |
68c45bf0 | 1260 | emacs_close (fd); |
6bb6da3e | 1261 | val = call4 (Vload_source_file_function, found, hist_file_name, |
7ee3bd7b | 1262 | NILP (noerror) ? Qnil : Qt, |
beb0b7f9 | 1263 | (NILP (nomessage) || force_load_messages) ? Qnil : Qt); |
7ee3bd7b | 1264 | return unbind_to (count, val); |
fe0e03f3 KH |
1265 | } |
1266 | } | |
078e7b4a | 1267 | |
6bb6da3e | 1268 | GCPRO3 (file, found, hist_file_name); |
0fc213e9 | 1269 | |
229ba775 | 1270 | #ifdef WINDOWSNT |
eb191db2 | 1271 | efound = ENCODE_FILE (found); |
35774242 EZ |
1272 | /* If we somehow got here with fd == -2, meaning the file is deemed |
1273 | to be remote, don't even try to reopen the file locally; just | |
1274 | force a failure instead. */ | |
1275 | if (fd >= 0) | |
1276 | { | |
1277 | emacs_close (fd); | |
1278 | stream = fopen (SSDATA (efound), fmode); | |
1279 | } | |
1280 | else | |
1281 | stream = NULL; | |
229ba775 EZ |
1282 | #else /* not WINDOWSNT */ |
1283 | stream = fdopen (fd, fmode); | |
1284 | #endif /* not WINDOWSNT */ | |
078e7b4a JB |
1285 | if (stream == 0) |
1286 | { | |
68c45bf0 | 1287 | emacs_close (fd); |
d5db4077 | 1288 | error ("Failure to create stdio stream for %s", SDATA (file)); |
078e7b4a JB |
1289 | } |
1290 | ||
4b104c41 | 1291 | if (! NILP (Vpurify_flag)) |
5e617bc2 | 1292 | Vpreloaded_file_list = Fcons (Fpurecopy (file), Vpreloaded_file_list); |
4b104c41 | 1293 | |
beb0b7f9 | 1294 | if (NILP (nomessage) || force_load_messages) |
04fc68e7 | 1295 | { |
da84f340 GM |
1296 | if (!safe_p) |
1297 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...", | |
1298 | file, 1); | |
1299 | else if (!compiled) | |
e28552a4 | 1300 | message_with_string ("Loading %s (source)...", file, 1); |
db5cae4b | 1301 | else if (newer) |
e28552a4 RS |
1302 | message_with_string ("Loading %s (compiled; note, source file is newer)...", |
1303 | file, 1); | |
db5cae4b | 1304 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1305 | message_with_string ("Loading %s...", file, 1); |
04fc68e7 | 1306 | } |
078e7b4a | 1307 | |
c04d9e70 | 1308 | record_unwind_protect (load_unwind, make_save_value (stream, 0)); |
d2c6be7f | 1309 | record_unwind_protect (load_descriptor_unwind, load_descriptor_list); |
20ea2964 | 1310 | specbind (Qload_file_name, found); |
74549846 | 1311 | specbind (Qinhibit_file_name_operation, Qnil); |
d2c6be7f RS |
1312 | load_descriptor_list |
1313 | = Fcons (make_number (fileno (stream)), load_descriptor_list); | |
2baf5e76 | 1314 | specbind (Qload_in_progress, Qt); |
b9598260 SM |
1315 | |
1316 | instream = stream; | |
1317 | if (lisp_file_lexically_bound_p (Qget_file_char)) | |
1318 | Fset (Qlexical_binding, Qt); | |
1319 | ||
ab2a47e1 | 1320 | if (! version || version >= 22) |
b883cdb2 | 1321 | readevalloop (Qget_file_char, stream, hist_file_name, |
defb1411 | 1322 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 KH |
1323 | else |
1324 | { | |
1325 | /* We can't handle a file which was compiled with | |
1326 | byte-compile-dynamic by older version of Emacs. */ | |
1327 | specbind (Qload_force_doc_strings, Qt); | |
defb1411 | 1328 | readevalloop (Qget_emacs_mule_file_char, stream, hist_file_name, |
768d4533 | 1329 | 0, Qnil, Qnil, Qnil, Qnil); |
8792be66 | 1330 | } |
078e7b4a JB |
1331 | unbind_to (count, Qnil); |
1332 | ||
48def666 | 1333 | /* Run any eval-after-load forms for this file. */ |
428b13d6 | 1334 | if (!NILP (Ffboundp (Qdo_after_load_evaluation))) |
6bb6da3e AM |
1335 | call1 (Qdo_after_load_evaluation, hist_file_name) ; |
1336 | ||
078e7b4a JB |
1337 | UNGCPRO; |
1338 | ||
97dead2d | 1339 | xfree (saved_doc_string); |
b2a30870 RS |
1340 | saved_doc_string = 0; |
1341 | saved_doc_string_size = 0; | |
1342 | ||
70fdbb46 | 1343 | xfree (prev_saved_doc_string); |
c15cfd1f RS |
1344 | prev_saved_doc_string = 0; |
1345 | prev_saved_doc_string_size = 0; | |
1346 | ||
beb0b7f9 | 1347 | if (!noninteractive && (NILP (nomessage) || force_load_messages)) |
04fc68e7 | 1348 | { |
da84f340 GM |
1349 | if (!safe_p) |
1350 | message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done", | |
1351 | file, 1); | |
1352 | else if (!compiled) | |
e28552a4 | 1353 | message_with_string ("Loading %s (source)...done", file, 1); |
db5cae4b | 1354 | else if (newer) |
e28552a4 RS |
1355 | message_with_string ("Loading %s (compiled; note, source file is newer)...done", |
1356 | file, 1); | |
db5cae4b | 1357 | else /* The typical case; compiled file newer than source file. */ |
e28552a4 | 1358 | message_with_string ("Loading %s...done", file, 1); |
04fc68e7 | 1359 | } |
7ee3bd7b | 1360 | |
078e7b4a JB |
1361 | return Qt; |
1362 | } | |
1363 | ||
1364 | static Lisp_Object | |
48def666 | 1365 | load_unwind (Lisp_Object arg) /* Used as unwind-protect function in load. */ |
078e7b4a | 1366 | { |
ebfe97a2 KS |
1367 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
1368 | if (stream != NULL) | |
66cd0949 | 1369 | { |
4d7e6e51 | 1370 | block_input (); |
66cd0949 | 1371 | fclose (stream); |
4d7e6e51 | 1372 | unblock_input (); |
66cd0949 | 1373 | } |
078e7b4a JB |
1374 | return Qnil; |
1375 | } | |
1376 | ||
d2c6be7f | 1377 | static Lisp_Object |
971de7fb | 1378 | load_descriptor_unwind (Lisp_Object oldlist) |
d2c6be7f RS |
1379 | { |
1380 | load_descriptor_list = oldlist; | |
838abf56 | 1381 | return Qnil; |
d2c6be7f RS |
1382 | } |
1383 | ||
1384 | /* Close all descriptors in use for Floads. | |
1385 | This is used when starting a subprocess. */ | |
1386 | ||
1387 | void | |
971de7fb | 1388 | close_load_descs (void) |
d2c6be7f | 1389 | { |
f3849f25 | 1390 | #ifndef WINDOWSNT |
d2c6be7f | 1391 | Lisp_Object tail; |
9beb8baa | 1392 | for (tail = load_descriptor_list; CONSP (tail); tail = XCDR (tail)) |
68c45bf0 | 1393 | emacs_close (XFASTINT (XCAR (tail))); |
f3849f25 | 1394 | #endif |
d2c6be7f | 1395 | } |
078e7b4a JB |
1396 | \f |
1397 | static int | |
971de7fb | 1398 | complete_filename_p (Lisp_Object pathname) |
078e7b4a | 1399 | { |
4b2dd274 | 1400 | register const unsigned char *s = SDATA (pathname); |
317073d5 | 1401 | return (IS_DIRECTORY_SEP (s[0]) |
d5db4077 | 1402 | || (SCHARS (pathname) > 2 |
7c2fb837 | 1403 | && IS_DEVICE_SEP (s[1]) && IS_DIRECTORY_SEP (s[2]))); |
078e7b4a JB |
1404 | } |
1405 | ||
86d00812 SM |
1406 | DEFUN ("locate-file-internal", Flocate_file_internal, Slocate_file_internal, 2, 4, 0, |
1407 | doc: /* Search for FILENAME through PATH. | |
57a131fb | 1408 | Returns the file's name in absolute form, or nil if not found. |
86d00812 SM |
1409 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
1410 | file name when searching. | |
1411 | If non-nil, PREDICATE is used instead of `file-readable-p'. | |
1412 | PREDICATE can also be an integer to pass to the access(2) function, | |
aa56f361 SM |
1413 | in which case file-name-handlers are ignored. |
1414 | This function will normally skip directories, so if you want it to find | |
1415 | directories, make sure the PREDICATE function returns `dir-ok' for them. */) | |
5842a27b | 1416 | (Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate) |
86d00812 SM |
1417 | { |
1418 | Lisp_Object file; | |
1419 | int fd = openp (path, filename, suffixes, &file, predicate); | |
1420 | if (NILP (predicate) && fd > 0) | |
1421 | close (fd); | |
1422 | return file; | |
1423 | } | |
1424 | ||
aa56f361 | 1425 | static Lisp_Object Qdir_ok; |
86d00812 | 1426 | |
078e7b4a JB |
1427 | /* Search for a file whose name is STR, looking in directories |
1428 | in the Lisp list PATH, and trying suffixes from SUFFIX. | |
078e7b4a JB |
1429 | On success, returns a file descriptor. On failure, returns -1. |
1430 | ||
e61b9b87 | 1431 | SUFFIXES is a list of strings containing possible suffixes. |
e0f24100 | 1432 | The empty suffix is automatically added if the list is empty. |
e61b9b87 | 1433 | |
86d00812 SM |
1434 | PREDICATE non-nil means don't open the files, |
1435 | just look for one that satisfies the predicate. In this case, | |
1436 | returns 1 on success. The predicate can be a lisp function or | |
1437 | an integer to pass to `access' (in which case file-name-handlers | |
1438 | are ignored). | |
078e7b4a JB |
1439 | |
1440 | If STOREPTR is nonzero, it points to a slot where the name of | |
1441 | the file actually found should be stored as a Lisp string. | |
74549846 RS |
1442 | nil is stored there on failure. |
1443 | ||
96dc0f4e | 1444 | If the file we find is remote, return -2 |
86d00812 | 1445 | but store the found remote file name in *STOREPTR. */ |
078e7b4a JB |
1446 | |
1447 | int | |
971de7fb | 1448 | openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes, Lisp_Object *storeptr, Lisp_Object predicate) |
078e7b4a JB |
1449 | { |
1450 | register int fd; | |
d311d28c | 1451 | ptrdiff_t fn_size = 100; |
078e7b4a JB |
1452 | char buf[100]; |
1453 | register char *fn = buf; | |
1454 | int absolute = 0; | |
d311d28c | 1455 | ptrdiff_t want_length; |
74549846 | 1456 | Lisp_Object filename; |
078e7b4a | 1457 | struct stat st; |
eb191db2 EZ |
1458 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6; |
1459 | Lisp_Object string, tail, encoded_fn; | |
d311d28c | 1460 | ptrdiff_t max_suffix_len = 0; |
e61b9b87 | 1461 | |
6f8eafd1 SM |
1462 | CHECK_STRING (str); |
1463 | ||
e61b9b87 SM |
1464 | for (tail = suffixes; CONSP (tail); tail = XCDR (tail)) |
1465 | { | |
f5df591a | 1466 | CHECK_STRING_CAR (tail); |
e61b9b87 | 1467 | max_suffix_len = max (max_suffix_len, |
d5db4077 | 1468 | SBYTES (XCAR (tail))); |
e61b9b87 | 1469 | } |
078e7b4a | 1470 | |
8b9d426a | 1471 | string = filename = encoded_fn = Qnil; |
eb191db2 EZ |
1472 | GCPRO6 (str, string, filename, path, suffixes, encoded_fn); |
1473 | ||
078e7b4a JB |
1474 | if (storeptr) |
1475 | *storeptr = Qnil; | |
1476 | ||
1477 | if (complete_filename_p (str)) | |
1478 | absolute = 1; | |
1479 | ||
e61b9b87 | 1480 | for (; CONSP (path); path = XCDR (path)) |
078e7b4a | 1481 | { |
e61b9b87 | 1482 | filename = Fexpand_file_name (str, XCAR (path)); |
078e7b4a | 1483 | if (!complete_filename_p (filename)) |
48def666 | 1484 | /* If there are non-absolute elts in PATH (eg "."). */ |
078e7b4a | 1485 | /* Of course, this could conceivably lose if luser sets |
48def666 | 1486 | default-directory to be something non-absolute... */ |
078e7b4a | 1487 | { |
4b4deea2 | 1488 | filename = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
078e7b4a | 1489 | if (!complete_filename_p (filename)) |
48def666 | 1490 | /* Give up on this path element! */ |
078e7b4a JB |
1491 | continue; |
1492 | } | |
1493 | ||
640ee02d | 1494 | /* Calculate maximum length of any filename made from |
078e7b4a | 1495 | this path element/specified file name and any possible suffix. */ |
640ee02d PE |
1496 | want_length = max_suffix_len + SBYTES (filename); |
1497 | if (fn_size <= want_length) | |
38182d90 | 1498 | fn = alloca (fn_size = 100 + want_length); |
078e7b4a | 1499 | |
078e7b4a | 1500 | /* Loop over suffixes. */ |
a74d1c97 | 1501 | for (tail = NILP (suffixes) ? Fcons (empty_unibyte_string, Qnil) : suffixes; |
e61b9b87 | 1502 | CONSP (tail); tail = XCDR (tail)) |
078e7b4a | 1503 | { |
cb1caeaf | 1504 | ptrdiff_t fnlen, lsuffix = SBYTES (XCAR (tail)); |
74549846 | 1505 | Lisp_Object handler; |
eb191db2 | 1506 | int exists; |
078e7b4a | 1507 | |
c49afcd7 RS |
1508 | /* Concatenate path element/specified name with the suffix. |
1509 | If the directory starts with /:, remove that. */ | |
e99a530f PE |
1510 | int prefixlen = ((SCHARS (filename) > 2 |
1511 | && SREF (filename, 0) == '/' | |
1512 | && SREF (filename, 1) == ':') | |
1513 | ? 2 : 0); | |
1514 | fnlen = SBYTES (filename) - prefixlen; | |
1515 | memcpy (fn, SDATA (filename) + prefixlen, fnlen); | |
1516 | memcpy (fn + fnlen, SDATA (XCAR (tail)), lsuffix + 1); | |
1517 | fnlen += lsuffix; | |
74549846 | 1518 | /* Check that the file exists and is not a directory. */ |
e61b9b87 SM |
1519 | /* We used to only check for handlers on non-absolute file names: |
1520 | if (absolute) | |
1521 | handler = Qnil; | |
1522 | else | |
1523 | handler = Ffind_file_name_handler (filename, Qfile_exists_p); | |
1524 | It's not clear why that was the case and it breaks things like | |
1525 | (load "/bar.el") where the file is actually "/bar.el.gz". */ | |
cb1caeaf | 1526 | string = make_string (fn, fnlen); |
4773b8ca | 1527 | handler = Ffind_file_name_handler (string, Qfile_exists_p); |
86d00812 SM |
1528 | if ((!NILP (handler) || !NILP (predicate)) && !NATNUMP (predicate)) |
1529 | { | |
1530 | if (NILP (predicate)) | |
1531 | exists = !NILP (Ffile_readable_p (string)); | |
1532 | else | |
aa56f361 SM |
1533 | { |
1534 | Lisp_Object tmp = call1 (predicate, string); | |
1535 | exists = !NILP (tmp) | |
1536 | && (EQ (tmp, Qdir_ok) | |
aa0f73d1 | 1537 | || NILP (Ffile_directory_p (string))); |
aa56f361 | 1538 | } |
74549846 RS |
1539 | |
1540 | if (exists) | |
078e7b4a JB |
1541 | { |
1542 | /* We succeeded; return this descriptor and filename. */ | |
1543 | if (storeptr) | |
eb191db2 | 1544 | *storeptr = string; |
5ef2a3c0 | 1545 | UNGCPRO; |
96dc0f4e | 1546 | return -2; |
74549846 RS |
1547 | } |
1548 | } | |
1549 | else | |
1550 | { | |
4b2dd274 | 1551 | const char *pfn; |
eb191db2 EZ |
1552 | |
1553 | encoded_fn = ENCODE_FILE (string); | |
42a5b22f | 1554 | pfn = SSDATA (encoded_fn); |
f68c809d | 1555 | exists = (stat (pfn, &st) == 0 && ! S_ISDIR (st.st_mode)); |
74549846 RS |
1556 | if (exists) |
1557 | { | |
1558 | /* Check that we can access or open it. */ | |
86d00812 | 1559 | if (NATNUMP (predicate)) |
d311d28c PE |
1560 | fd = (((XFASTINT (predicate) & ~INT_MAX) == 0 |
1561 | && access (pfn, XFASTINT (predicate)) == 0) | |
1562 | ? 1 : -1); | |
74549846 | 1563 | else |
eb191db2 | 1564 | fd = emacs_open (pfn, O_RDONLY, 0); |
74549846 RS |
1565 | |
1566 | if (fd >= 0) | |
1567 | { | |
1568 | /* We succeeded; return this descriptor and filename. */ | |
1569 | if (storeptr) | |
eb191db2 | 1570 | *storeptr = string; |
74549846 RS |
1571 | UNGCPRO; |
1572 | return fd; | |
1573 | } | |
078e7b4a JB |
1574 | } |
1575 | } | |
078e7b4a | 1576 | } |
5a6e5452 | 1577 | if (absolute) |
5ef2a3c0 | 1578 | break; |
078e7b4a JB |
1579 | } |
1580 | ||
5ef2a3c0 KH |
1581 | UNGCPRO; |
1582 | return -1; | |
078e7b4a JB |
1583 | } |
1584 | ||
1585 | \f | |
ae321d28 RS |
1586 | /* Merge the list we've accumulated of globals from the current input source |
1587 | into the load_history variable. The details depend on whether | |
b502a9a1 RS |
1588 | the source has an associated file name or not. |
1589 | ||
1590 | FILENAME is the file name that we are loading from. | |
1591 | ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */ | |
ae321d28 RS |
1592 | |
1593 | static void | |
971de7fb | 1594 | build_load_history (Lisp_Object filename, int entire) |
ae321d28 RS |
1595 | { |
1596 | register Lisp_Object tail, prev, newelt; | |
1597 | register Lisp_Object tem, tem2; | |
b502a9a1 | 1598 | register int foundit = 0; |
ae321d28 RS |
1599 | |
1600 | tail = Vload_history; | |
1601 | prev = Qnil; | |
b502a9a1 | 1602 | |
86d00812 | 1603 | while (CONSP (tail)) |
ae321d28 | 1604 | { |
86d00812 | 1605 | tem = XCAR (tail); |
ae321d28 | 1606 | |
48def666 | 1607 | /* Find the feature's previous assoc list... */ |
b502a9a1 | 1608 | if (!NILP (Fequal (filename, Fcar (tem)))) |
ae321d28 RS |
1609 | { |
1610 | foundit = 1; | |
1611 | ||
48def666 | 1612 | /* If we're loading the entire file, remove old data. */ |
b502a9a1 | 1613 | if (entire) |
86d00812 | 1614 | { |
ae321d28 | 1615 | if (NILP (prev)) |
86d00812 | 1616 | Vload_history = XCDR (tail); |
ae321d28 | 1617 | else |
86d00812 | 1618 | Fsetcdr (prev, XCDR (tail)); |
ae321d28 RS |
1619 | } |
1620 | ||
1621 | /* Otherwise, cons on new symbols that are not already members. */ | |
1622 | else | |
1623 | { | |
1624 | tem2 = Vcurrent_load_list; | |
1625 | ||
1626 | while (CONSP (tem2)) | |
1627 | { | |
86d00812 | 1628 | newelt = XCAR (tem2); |
ae321d28 | 1629 | |
d642e4f9 | 1630 | if (NILP (Fmember (newelt, tem))) |
86d00812 SM |
1631 | Fsetcar (tail, Fcons (XCAR (tem), |
1632 | Fcons (newelt, XCDR (tem)))); | |
ae321d28 | 1633 | |
86d00812 | 1634 | tem2 = XCDR (tem2); |
ae321d28 RS |
1635 | QUIT; |
1636 | } | |
1637 | } | |
1638 | } | |
1639 | else | |
1640 | prev = tail; | |
86d00812 | 1641 | tail = XCDR (tail); |
ae321d28 RS |
1642 | QUIT; |
1643 | } | |
1644 | ||
b502a9a1 RS |
1645 | /* If we're loading an entire file, cons the new assoc onto the |
1646 | front of load-history, the most-recently-loaded position. Also | |
1647 | do this if we didn't find an existing member for the file. */ | |
1648 | if (entire || !foundit) | |
8a1f1537 RS |
1649 | Vload_history = Fcons (Fnreverse (Vcurrent_load_list), |
1650 | Vload_history); | |
ae321d28 RS |
1651 | } |
1652 | ||
94e554db | 1653 | static Lisp_Object |
971de7fb | 1654 | readevalloop_1 (Lisp_Object old) |
94e554db RS |
1655 | { |
1656 | load_convert_to_unibyte = ! NILP (old); | |
1657 | return Qnil; | |
1658 | } | |
1659 | ||
9c97398c GM |
1660 | /* Signal an `end-of-file' error, if possible with file name |
1661 | information. */ | |
1662 | ||
845ca893 | 1663 | static _Noreturn void |
971de7fb | 1664 | end_of_file_error (void) |
9c97398c | 1665 | { |
9c97398c | 1666 | if (STRINGP (Vload_file_name)) |
336d4a9c | 1667 | xsignal1 (Qend_of_file, Vload_file_name); |
9c97398c | 1668 | |
336d4a9c | 1669 | xsignal0 (Qend_of_file); |
9c97398c GM |
1670 | } |
1671 | ||
94e554db | 1672 | /* UNIBYTE specifies how to set load_convert_to_unibyte |
976350af | 1673 | for this invocation. |
4c03c46d | 1674 | READFUN, if non-nil, is used instead of `read'. |
1ed7b9ae RS |
1675 | |
1676 | START, END specify region to read in current buffer (from eval-region). | |
1677 | If the input is not from a buffer, they must be nil. */ | |
94e554db | 1678 | |
078e7b4a | 1679 | static void |
dd4c5104 DN |
1680 | readevalloop (Lisp_Object readcharfun, |
1681 | FILE *stream, | |
1682 | Lisp_Object sourcename, | |
dd4c5104 DN |
1683 | int printflag, |
1684 | Lisp_Object unibyte, Lisp_Object readfun, | |
1685 | Lisp_Object start, Lisp_Object end) | |
078e7b4a JB |
1686 | { |
1687 | register int c; | |
1688 | register Lisp_Object val; | |
d311d28c | 1689 | ptrdiff_t count = SPECPDL_INDEX (); |
0a37f512 | 1690 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
49cf7ff4 | 1691 | struct buffer *b = 0; |
f38952fe | 1692 | int continue_reading_p; |
b9598260 | 1693 | Lisp_Object lex_bound; |
d11db2c8 RS |
1694 | /* Nonzero if reading an entire buffer. */ |
1695 | int whole_buffer = 0; | |
1696 | /* 1 on the first time around. */ | |
1697 | int first_sexp = 1; | |
972debf2 SM |
1698 | Lisp_Object macroexpand = intern ("internal-macroexpand-for-load"); |
1699 | ||
1700 | if (NILP (Ffboundp (macroexpand)) | |
1701 | /* Don't macroexpand in .elc files, since it should have been done | |
1702 | already. We actually don't know whether we're in a .elc file or not, | |
735135f9 | 1703 | so we use circumstantial evidence: .el files normally go through |
972debf2 SM |
1704 | Vload_source_file_function -> load-with-code-conversion |
1705 | -> eval-buffer. */ | |
1706 | || EQ (readcharfun, Qget_file_char) | |
1707 | || EQ (readcharfun, Qget_emacs_mule_file_char)) | |
1708 | macroexpand = Qnil; | |
d11db2c8 RS |
1709 | |
1710 | if (MARKERP (readcharfun)) | |
1711 | { | |
1712 | if (NILP (start)) | |
8878319c | 1713 | start = readcharfun; |
d11db2c8 | 1714 | } |
49cf7ff4 RS |
1715 | |
1716 | if (BUFFERP (readcharfun)) | |
1717 | b = XBUFFER (readcharfun); | |
1718 | else if (MARKERP (readcharfun)) | |
1719 | b = XMARKER (readcharfun)->buffer; | |
078e7b4a | 1720 | |
1ed7b9ae RS |
1721 | /* We assume START is nil when input is not from a buffer. */ |
1722 | if (! NILP (start) && !b) | |
1088b922 | 1723 | emacs_abort (); |
1ed7b9ae | 1724 | |
0a37f512 | 1725 | specbind (Qstandard_input, readcharfun); /* GCPROs readcharfun. */ |
8a1f1537 | 1726 | specbind (Qcurrent_load_list, Qnil); |
94e554db RS |
1727 | record_unwind_protect (readevalloop_1, load_convert_to_unibyte ? Qt : Qnil); |
1728 | load_convert_to_unibyte = !NILP (unibyte); | |
078e7b4a | 1729 | |
b9598260 SM |
1730 | /* If lexical binding is active (either because it was specified in |
1731 | the file's header, or via a buffer-local variable), create an empty | |
1732 | lexical environment, otherwise, turn off lexical binding. */ | |
1733 | lex_bound = find_symbol_value (Qlexical_binding); | |
f07a954e SM |
1734 | specbind (Qinternal_interpreter_environment, |
1735 | NILP (lex_bound) || EQ (lex_bound, Qunbound) | |
1736 | ? Qnil : Fcons (Qt, Qnil)); | |
b9598260 | 1737 | |
0a37f512 | 1738 | GCPRO4 (sourcename, readfun, start, end); |
ae321d28 | 1739 | |
48def666 | 1740 | /* Try to ensure sourcename is a truename, except whilst preloading. */ |
6bb6da3e | 1741 | if (NILP (Vpurify_flag) |
91fe9496 SM |
1742 | && !NILP (sourcename) && !NILP (Ffile_name_absolute_p (sourcename)) |
1743 | && !NILP (Ffboundp (Qfile_truename))) | |
6bb6da3e AM |
1744 | sourcename = call1 (Qfile_truename, sourcename) ; |
1745 | ||
ae321d28 RS |
1746 | LOADHIST_ATTACH (sourcename); |
1747 | ||
f38952fe GM |
1748 | continue_reading_p = 1; |
1749 | while (continue_reading_p) | |
078e7b4a | 1750 | { |
d311d28c | 1751 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4c03c46d | 1752 | |
e578f381 | 1753 | if (b != 0 && !BUFFER_LIVE_P (b)) |
49cf7ff4 RS |
1754 | error ("Reading from killed buffer"); |
1755 | ||
4c03c46d KS |
1756 | if (!NILP (start)) |
1757 | { | |
721b7d9e | 1758 | /* Switch to the buffer we are reading from. */ |
4c03c46d | 1759 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e RS |
1760 | set_buffer_internal (b); |
1761 | ||
1762 | /* Save point in it. */ | |
4c03c46d | 1763 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
721b7d9e | 1764 | /* Save ZV in it. */ |
4c03c46d | 1765 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
721b7d9e RS |
1766 | /* Those get unbound after we read one expression. */ |
1767 | ||
1768 | /* Set point and ZV around stuff to be read. */ | |
4c03c46d | 1769 | Fgoto_char (start); |
d11db2c8 RS |
1770 | if (!NILP (end)) |
1771 | Fnarrow_to_region (make_number (BEGV), end); | |
1772 | ||
1773 | /* Just for cleanliness, convert END to a marker | |
1774 | if it is an integer. */ | |
1775 | if (INTEGERP (end)) | |
1776 | end = Fpoint_max_marker (); | |
4c03c46d KS |
1777 | } |
1778 | ||
d11db2c8 RS |
1779 | /* On the first cycle, we can easily test here |
1780 | whether we are reading the whole buffer. */ | |
1781 | if (b && first_sexp) | |
1782 | whole_buffer = (PT == BEG && ZV == Z); | |
1783 | ||
078e7b4a | 1784 | instream = stream; |
4c03c46d | 1785 | read_next: |
078e7b4a JB |
1786 | c = READCHAR; |
1787 | if (c == ';') | |
1788 | { | |
1789 | while ((c = READCHAR) != '\n' && c != -1); | |
4c03c46d KS |
1790 | goto read_next; |
1791 | } | |
1792 | if (c < 0) | |
1793 | { | |
1794 | unbind_to (count1, Qnil); | |
1795 | break; | |
078e7b4a | 1796 | } |
6069d957 RS |
1797 | |
1798 | /* Ignore whitespace here, so we can detect eof. */ | |
adef3de7 | 1799 | if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' |
ed497dd4 | 1800 | || c == 0xa0) /* NBSP */ |
4c03c46d | 1801 | goto read_next; |
078e7b4a | 1802 | |
265a9e55 | 1803 | if (!NILP (Vpurify_flag) && c == '(') |
078e7b4a | 1804 | { |
48def666 | 1805 | val = read_list (0, readcharfun); |
078e7b4a JB |
1806 | } |
1807 | else | |
1808 | { | |
1809 | UNREAD (c); | |
4ad679f9 | 1810 | read_objects = Qnil; |
f38952fe GM |
1811 | if (!NILP (readfun)) |
1812 | { | |
1813 | val = call1 (readfun, readcharfun); | |
1814 | ||
1815 | /* If READCHARFUN has set point to ZV, we should | |
1816 | stop reading, even if the form read sets point | |
1817 | to a different value when evaluated. */ | |
1818 | if (BUFFERP (readcharfun)) | |
1819 | { | |
0902fe45 PE |
1820 | struct buffer *buf = XBUFFER (readcharfun); |
1821 | if (BUF_PT (buf) == BUF_ZV (buf)) | |
f38952fe GM |
1822 | continue_reading_p = 0; |
1823 | } | |
1824 | } | |
976350af | 1825 | else if (! NILP (Vload_read_function)) |
84a15045 | 1826 | val = call1 (Vload_read_function, readcharfun); |
976350af | 1827 | else |
abb13b09 | 1828 | val = read_internal_start (readcharfun, Qnil, Qnil); |
078e7b4a JB |
1829 | } |
1830 | ||
4c03c46d KS |
1831 | if (!NILP (start) && continue_reading_p) |
1832 | start = Fpoint_marker (); | |
d11db2c8 RS |
1833 | |
1834 | /* Restore saved point and BEGV. */ | |
4c03c46d KS |
1835 | unbind_to (count1, Qnil); |
1836 | ||
d11db2c8 | 1837 | /* Now eval what we just read. */ |
972debf2 SM |
1838 | if (!NILP (macroexpand)) |
1839 | val = call1 (macroexpand, val); | |
defb1411 | 1840 | val = eval_sub (val); |
f38952fe | 1841 | |
078e7b4a JB |
1842 | if (printflag) |
1843 | { | |
1844 | Vvalues = Fcons (val, Vvalues); | |
1845 | if (EQ (Vstandard_output, Qt)) | |
1846 | Fprin1 (val, Qnil); | |
1847 | else | |
1848 | Fprint (val, Qnil); | |
1849 | } | |
d11db2c8 RS |
1850 | |
1851 | first_sexp = 0; | |
078e7b4a JB |
1852 | } |
1853 | ||
8878319c | 1854 | build_load_history (sourcename, |
d11db2c8 | 1855 | stream || whole_buffer); |
b502a9a1 | 1856 | |
ae321d28 RS |
1857 | UNGCPRO; |
1858 | ||
078e7b4a JB |
1859 | unbind_to (count, Qnil); |
1860 | } | |
1861 | ||
1076254d | 1862 | DEFUN ("eval-buffer", Feval_buffer, Seval_buffer, 0, 5, "", |
5de38842 | 1863 | doc: /* Execute the current buffer as Lisp code. |
72097cd9 CY |
1864 | When called from a Lisp program (i.e., not interactively), this |
1865 | function accepts up to five optional arguments: | |
5de38842 PJ |
1866 | BUFFER is the buffer to evaluate (nil means use current buffer). |
1867 | PRINTFLAG controls printing of output: | |
72097cd9 CY |
1868 | A value of nil means discard it; anything else is stream for print. |
1869 | FILENAME specifies the file name to use for `load-history'. | |
1870 | UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this | |
1871 | invocation. | |
1872 | DO-ALLOW-PRINT, if non-nil, specifies that `print' and related | |
1873 | functions should work normally even if PRINTFLAG is nil. | |
5de38842 PJ |
1874 | |
1875 | This function preserves the position of point. */) | |
5842a27b | 1876 | (Lisp_Object buffer, Lisp_Object printflag, Lisp_Object filename, Lisp_Object unibyte, Lisp_Object do_allow_print) |
228d4b1c | 1877 | { |
d311d28c | 1878 | ptrdiff_t count = SPECPDL_INDEX (); |
228d4b1c JA |
1879 | Lisp_Object tem, buf; |
1880 | ||
9391b698 | 1881 | if (NILP (buffer)) |
228d4b1c JA |
1882 | buf = Fcurrent_buffer (); |
1883 | else | |
9391b698 | 1884 | buf = Fget_buffer (buffer); |
dfdb645c | 1885 | if (NILP (buf)) |
13febd85 | 1886 | error ("No such buffer"); |
228d4b1c | 1887 | |
1076254d | 1888 | if (NILP (printflag) && NILP (do_allow_print)) |
228d4b1c JA |
1889 | tem = Qsymbolp; |
1890 | else | |
1891 | tem = printflag; | |
13febd85 RS |
1892 | |
1893 | if (NILP (filename)) | |
4b4deea2 | 1894 | filename = BVAR (XBUFFER (buf), filename); |
13febd85 | 1895 | |
3f39f996 | 1896 | specbind (Qeval_buffer_list, Fcons (buf, Veval_buffer_list)); |
228d4b1c JA |
1897 | specbind (Qstandard_output, tem); |
1898 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
bf1c0f27 | 1899 | BUF_TEMP_SET_PT (XBUFFER (buf), BUF_BEGV (XBUFFER (buf))); |
7200d79c | 1900 | specbind (Qlexical_binding, lisp_file_lexically_bound_p (buf) ? Qt : Qnil); |
defb1411 | 1901 | readevalloop (buf, 0, filename, |
4c03c46d | 1902 | !NILP (printflag), unibyte, Qnil, Qnil, Qnil); |
cb09ab7a | 1903 | unbind_to (count, Qnil); |
228d4b1c JA |
1904 | |
1905 | return Qnil; | |
1906 | } | |
1907 | ||
976350af | 1908 | DEFUN ("eval-region", Feval_region, Seval_region, 2, 4, "r", |
5de38842 PJ |
1909 | doc: /* Execute the region as Lisp code. |
1910 | When called from programs, expects two arguments, | |
1911 | giving starting and ending indices in the current buffer | |
1912 | of the text to be executed. | |
1913 | Programs can pass third argument PRINTFLAG which controls output: | |
51d8b30e | 1914 | A value of nil means discard it; anything else is stream for printing it. |
5de38842 PJ |
1915 | Also the fourth argument READ-FUNCTION, if non-nil, is used |
1916 | instead of `read' to read each expression. It gets one argument | |
1917 | which is the input stream for reading characters. | |
1918 | ||
1919 | This function does not move point. */) | |
5842a27b | 1920 | (Lisp_Object start, Lisp_Object end, Lisp_Object printflag, Lisp_Object read_function) |
078e7b4a | 1921 | { |
e4769531 | 1922 | /* FIXME: Do the eval-sexp-add-defvars dance! */ |
d311d28c | 1923 | ptrdiff_t count = SPECPDL_INDEX (); |
ae321d28 RS |
1924 | Lisp_Object tem, cbuf; |
1925 | ||
1926 | cbuf = Fcurrent_buffer (); | |
078e7b4a | 1927 | |
265a9e55 | 1928 | if (NILP (printflag)) |
078e7b4a JB |
1929 | tem = Qsymbolp; |
1930 | else | |
1931 | tem = printflag; | |
1932 | specbind (Qstandard_output, tem); | |
3f39f996 | 1933 | specbind (Qeval_buffer_list, Fcons (cbuf, Veval_buffer_list)); |
078e7b4a | 1934 | |
48def666 | 1935 | /* `readevalloop' calls functions which check the type of start and end. */ |
f619ad4c | 1936 | readevalloop (cbuf, 0, BVAR (XBUFFER (cbuf), filename), |
4c03c46d KS |
1937 | !NILP (printflag), Qnil, read_function, |
1938 | start, end); | |
078e7b4a JB |
1939 | |
1940 | return unbind_to (count, Qnil); | |
1941 | } | |
1942 | ||
078e7b4a | 1943 | \f |
a7ca3326 | 1944 | DEFUN ("read", Fread, Sread, 0, 1, 0, |
5de38842 PJ |
1945 | doc: /* Read one Lisp expression as text from STREAM, return as Lisp object. |
1946 | If STREAM is nil, use the value of `standard-input' (which see). | |
1947 | STREAM or the value of `standard-input' may be: | |
1948 | a buffer (read from point and advance it) | |
1949 | a marker (read from where it points and advance it) | |
1950 | a function (call it with no arguments for each character, | |
1951 | call it with a char as argument to push a char back) | |
1952 | a string (takes text from string, starting at the beginning) | |
1953 | t (read text line using minibuffer and use it, or read from | |
1954 | standard input in batch mode). */) | |
5842a27b | 1955 | (Lisp_Object stream) |
078e7b4a | 1956 | { |
5be02dff KH |
1957 | if (NILP (stream)) |
1958 | stream = Vstandard_input; | |
1959 | if (EQ (stream, Qt)) | |
1960 | stream = Qread_char; | |
5be02dff | 1961 | if (EQ (stream, Qread_char)) |
078e7b4a | 1962 | return Fread_minibuffer (build_string ("Lisp expression: "), Qnil); |
078e7b4a | 1963 | |
abb13b09 | 1964 | return read_internal_start (stream, Qnil, Qnil); |
078e7b4a JB |
1965 | } |
1966 | ||
a7ca3326 | 1967 | DEFUN ("read-from-string", Fread_from_string, Sread_from_string, 1, 3, 0, |
5de38842 PJ |
1968 | doc: /* Read one Lisp expression which is represented as text by STRING. |
1969 | Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX). | |
a4824228 | 1970 | FINAL-STRING-INDEX is an integer giving the position of the next |
a239d4e9 | 1971 | remaining character in STRING. |
5de38842 PJ |
1972 | START and END optionally delimit a substring of STRING from which to read; |
1973 | they default to 0 and (length STRING) respectively. */) | |
5842a27b | 1974 | (Lisp_Object string, Lisp_Object start, Lisp_Object end) |
078e7b4a | 1975 | { |
2530ceaf | 1976 | Lisp_Object ret; |
b7826503 | 1977 | CHECK_STRING (string); |
48def666 | 1978 | /* `read_internal_start' sets `read_from_string_index'. */ |
2530ceaf | 1979 | ret = read_internal_start (string, start, end); |
5135ab39 | 1980 | return Fcons (ret, make_number (read_from_string_index)); |
abb13b09 | 1981 | } |
078e7b4a | 1982 | |
abb13b09 | 1983 | /* Function to set up the global context we need in toplevel read |
48def666 | 1984 | calls. */ |
abb13b09 | 1985 | static Lisp_Object |
971de7fb | 1986 | read_internal_start (Lisp_Object stream, Lisp_Object start, Lisp_Object end) |
48def666 | 1987 | /* `start', `end' only used when stream is a string. */ |
abb13b09 CW |
1988 | { |
1989 | Lisp_Object retval; | |
078e7b4a | 1990 | |
abb13b09 | 1991 | readchar_count = 0; |
17634846 | 1992 | new_backquote_flag = 0; |
4ad679f9 | 1993 | read_objects = Qnil; |
abb13b09 CW |
1994 | if (EQ (Vread_with_symbol_positions, Qt) |
1995 | || EQ (Vread_with_symbol_positions, stream)) | |
1996 | Vread_symbol_positions_list = Qnil; | |
1997 | ||
8f924df7 KH |
1998 | if (STRINGP (stream) |
1999 | || ((CONSP (stream) && STRINGP (XCAR (stream))))) | |
abb13b09 | 2000 | { |
d311d28c | 2001 | ptrdiff_t startval, endval; |
8f924df7 | 2002 | Lisp_Object string; |
078e7b4a | 2003 | |
8f924df7 KH |
2004 | if (STRINGP (stream)) |
2005 | string = stream; | |
2006 | else | |
2007 | string = XCAR (stream); | |
078e7b4a | 2008 | |
abb13b09 | 2009 | if (NILP (end)) |
8f924df7 | 2010 | endval = SCHARS (string); |
abb13b09 CW |
2011 | else |
2012 | { | |
2013 | CHECK_NUMBER (end); | |
d311d28c | 2014 | if (! (0 <= XINT (end) && XINT (end) <= SCHARS (string))) |
8f924df7 | 2015 | args_out_of_range (string, end); |
d311d28c | 2016 | endval = XINT (end); |
abb13b09 | 2017 | } |
17634846 | 2018 | |
abb13b09 CW |
2019 | if (NILP (start)) |
2020 | startval = 0; | |
2021 | else | |
2022 | { | |
2023 | CHECK_NUMBER (start); | |
d311d28c | 2024 | if (! (0 <= XINT (start) && XINT (start) <= endval)) |
8f924df7 | 2025 | args_out_of_range (string, start); |
d311d28c | 2026 | startval = XINT (start); |
abb13b09 CW |
2027 | } |
2028 | read_from_string_index = startval; | |
8f924df7 | 2029 | read_from_string_index_byte = string_char_to_byte (string, startval); |
abb13b09 CW |
2030 | read_from_string_limit = endval; |
2031 | } | |
177c0ea7 | 2032 | |
abb13b09 CW |
2033 | retval = read0 (stream); |
2034 | if (EQ (Vread_with_symbol_positions, Qt) | |
2035 | || EQ (Vread_with_symbol_positions, stream)) | |
2036 | Vread_symbol_positions_list = Fnreverse (Vread_symbol_positions_list); | |
2037 | return retval; | |
078e7b4a JB |
2038 | } |
2039 | \f | |
336d4a9c KS |
2040 | |
2041 | /* Signal Qinvalid_read_syntax error. | |
2042 | S is error string of length N (if > 0) */ | |
2043 | ||
845ca893 | 2044 | static _Noreturn void |
e4d29b33 | 2045 | invalid_syntax (const char *s) |
336d4a9c | 2046 | { |
e4d29b33 | 2047 | xsignal1 (Qinvalid_read_syntax, build_string (s)); |
336d4a9c KS |
2048 | } |
2049 | ||
2050 | ||
6428369f | 2051 | /* Use this for recursive reads, in contexts where internal tokens |
48def666 | 2052 | are not allowed. */ |
e28552a4 | 2053 | |
078e7b4a | 2054 | static Lisp_Object |
971de7fb | 2055 | read0 (Lisp_Object readcharfun) |
078e7b4a JB |
2056 | { |
2057 | register Lisp_Object val; | |
e28552a4 | 2058 | int c; |
078e7b4a | 2059 | |
17634846 | 2060 | val = read1 (readcharfun, &c, 0); |
336d4a9c KS |
2061 | if (!c) |
2062 | return val; | |
078e7b4a | 2063 | |
336d4a9c KS |
2064 | xsignal1 (Qinvalid_read_syntax, |
2065 | Fmake_string (make_number (1), make_number (c))); | |
078e7b4a JB |
2066 | } |
2067 | \f | |
82cb60d3 | 2068 | static ptrdiff_t read_buffer_size; |
078e7b4a JB |
2069 | static char *read_buffer; |
2070 | ||
f6f79b37 | 2071 | /* Read a \-escape sequence, assuming we already read the `\'. |
8f924df7 | 2072 | If the escape sequence forces unibyte, return eight-bit char. */ |
6f7f43d5 | 2073 | |
078e7b4a | 2074 | static int |
971de7fb | 2075 | read_escape (Lisp_Object readcharfun, int stringp) |
078e7b4a JB |
2076 | { |
2077 | register int c = READCHAR; | |
9735b9ce | 2078 | /* \u allows up to four hex digits, \U up to eight. Default to the |
48def666 | 2079 | behavior for \u, and change this value in the case that \U is seen. */ |
71b169b8 | 2080 | int unicode_hex_count = 4; |
f6f79b37 | 2081 | |
078e7b4a JB |
2082 | switch (c) |
2083 | { | |
f3849f25 | 2084 | case -1: |
da3b886d | 2085 | end_of_file_error (); |
f3849f25 | 2086 | |
078e7b4a | 2087 | case 'a': |
265a9e55 | 2088 | return '\007'; |
078e7b4a JB |
2089 | case 'b': |
2090 | return '\b'; | |
f405a585 RS |
2091 | case 'd': |
2092 | return 0177; | |
078e7b4a JB |
2093 | case 'e': |
2094 | return 033; | |
2095 | case 'f': | |
2096 | return '\f'; | |
2097 | case 'n': | |
2098 | return '\n'; | |
2099 | case 'r': | |
2100 | return '\r'; | |
2101 | case 't': | |
2102 | return '\t'; | |
2103 | case 'v': | |
2104 | return '\v'; | |
2105 | case '\n': | |
2106 | return -1; | |
e28552a4 | 2107 | case ' ': |
e7fc914b KH |
2108 | if (stringp) |
2109 | return -1; | |
2110 | return ' '; | |
078e7b4a JB |
2111 | |
2112 | case 'M': | |
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 | 2119 | return c | meta_modifier; |
f405a585 RS |
2120 | |
2121 | case 'S': | |
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 | shift_modifier; |
2129 | ||
2130 | case 'H': | |
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 | hyper_modifier; |
2138 | ||
2139 | case 'A': | |
2140 | c = READCHAR; | |
2141 | if (c != '-') | |
2142 | error ("Invalid escape character syntax"); | |
2143 | c = READCHAR; | |
2144 | if (c == '\\') | |
8792be66 | 2145 | c = read_escape (readcharfun, 0); |
7bd279cd RS |
2146 | return c | alt_modifier; |
2147 | ||
2148 | case 's': | |
2149 | c = READCHAR; | |
4d7528d0 | 2150 | if (stringp || c != '-') |
010b7eac RS |
2151 | { |
2152 | UNREAD (c); | |
2153 | return ' '; | |
2154 | } | |
7bd279cd RS |
2155 | c = READCHAR; |
2156 | if (c == '\\') | |
8792be66 | 2157 | c = read_escape (readcharfun, 0); |
7bd279cd | 2158 | return c | super_modifier; |
078e7b4a JB |
2159 | |
2160 | case 'C': | |
2161 | c = READCHAR; | |
2162 | if (c != '-') | |
2163 | error ("Invalid escape character syntax"); | |
2164 | case '^': | |
2165 | c = READCHAR; | |
2166 | if (c == '\\') | |
8792be66 | 2167 | c = read_escape (readcharfun, 0); |
164d590d KH |
2168 | if ((c & ~CHAR_MODIFIER_MASK) == '?') |
2169 | return 0177 | (c & CHAR_MODIFIER_MASK); | |
2170 | else if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) | |
2171 | return c | ctrl_modifier; | |
f405a585 RS |
2172 | /* ASCII control chars are made from letters (both cases), |
2173 | as well as the non-letters within 0100...0137. */ | |
2174 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
2175 | return (c & (037 | ~0177)); | |
2176 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
2177 | return (c & (037 | ~0177)); | |
078e7b4a | 2178 | else |
7bd279cd | 2179 | return c | ctrl_modifier; |
078e7b4a JB |
2180 | |
2181 | case '0': | |
2182 | case '1': | |
2183 | case '2': | |
2184 | case '3': | |
2185 | case '4': | |
2186 | case '5': | |
2187 | case '6': | |
2188 | case '7': | |
2189 | /* An octal escape, as in ANSI C. */ | |
2190 | { | |
2191 | register int i = c - '0'; | |
2192 | register int count = 0; | |
2193 | while (++count < 3) | |
2194 | { | |
2195 | if ((c = READCHAR) >= '0' && c <= '7') | |
2196 | { | |
2197 | i *= 8; | |
2198 | i += c - '0'; | |
2199 | } | |
2200 | else | |
2201 | { | |
2202 | UNREAD (c); | |
2203 | break; | |
2204 | } | |
2205 | } | |
177c0ea7 | 2206 | |
8f924df7 | 2207 | if (i >= 0x80 && i < 0x100) |
8792be66 | 2208 | i = BYTE8_TO_CHAR (i); |
078e7b4a JB |
2209 | return i; |
2210 | } | |
2211 | ||
2212 | case 'x': | |
2213 | /* A hex escape, as in ANSI C. */ | |
2214 | { | |
0324f3af | 2215 | unsigned int i = 0; |
1571601b | 2216 | int count = 0; |
078e7b4a JB |
2217 | while (1) |
2218 | { | |
2219 | c = READCHAR; | |
2220 | if (c >= '0' && c <= '9') | |
2221 | { | |
2222 | i *= 16; | |
2223 | i += c - '0'; | |
2224 | } | |
2225 | else if ((c >= 'a' && c <= 'f') | |
2226 | || (c >= 'A' && c <= 'F')) | |
2227 | { | |
2228 | i *= 16; | |
2229 | if (c >= 'a' && c <= 'f') | |
2230 | i += c - 'a' + 10; | |
2231 | else | |
2232 | i += c - 'A' + 10; | |
2233 | } | |
2234 | else | |
2235 | { | |
2236 | UNREAD (c); | |
2237 | break; | |
2238 | } | |
0324f3af PE |
2239 | /* Allow hex escapes as large as ?\xfffffff, because some |
2240 | packages use them to denote characters with modifiers. */ | |
2241 | if ((CHAR_META | (CHAR_META - 1)) < i) | |
39019e54 | 2242 | error ("Hex character out of range: \\x%x...", i); |
82cb60d3 | 2243 | count += count < 3; |
078e7b4a | 2244 | } |
f6f79b37 | 2245 | |
1571601b | 2246 | if (count < 3 && i >= 0x80) |
8792be66 | 2247 | return BYTE8_TO_CHAR (i); |
078e7b4a JB |
2248 | return i; |
2249 | } | |
2250 | ||
71b169b8 EZ |
2251 | case 'U': |
2252 | /* Post-Unicode-2.0: Up to eight hex chars. */ | |
2253 | unicode_hex_count = 8; | |
2254 | case 'u': | |
2255 | ||
9735b9ce | 2256 | /* A Unicode escape. We only permit them in strings and characters, |
71b169b8 EZ |
2257 | not arbitrarily in the source code, as in some other languages. */ |
2258 | { | |
a808f22d | 2259 | unsigned int i = 0; |
71b169b8 | 2260 | int count = 0; |
71b169b8 EZ |
2261 | |
2262 | while (++count <= unicode_hex_count) | |
2263 | { | |
2264 | c = READCHAR; | |
48def666 SM |
2265 | /* `isdigit' and `isalpha' may be locale-specific, which we don't |
2266 | want. */ | |
71b169b8 EZ |
2267 | if (c >= '0' && c <= '9') i = (i << 4) + (c - '0'); |
2268 | else if (c >= 'a' && c <= 'f') i = (i << 4) + (c - 'a') + 10; | |
2269 | else if (c >= 'A' && c <= 'F') i = (i << 4) + (c - 'A') + 10; | |
2270 | else | |
39019e54 | 2271 | error ("Non-hex digit used for Unicode escape"); |
71b169b8 | 2272 | } |
a808f22d KH |
2273 | if (i > 0x10FFFF) |
2274 | error ("Non-Unicode character: 0x%x", i); | |
7ea7f636 | 2275 | return i; |
71b169b8 EZ |
2276 | } |
2277 | ||
078e7b4a JB |
2278 | default: |
2279 | return c; | |
2280 | } | |
2281 | } | |
2282 | ||
a108c10b PE |
2283 | /* Return the digit that CHARACTER stands for in the given BASE. |
2284 | Return -1 if CHARACTER is out of range for BASE, | |
2285 | and -2 if CHARACTER is not valid for any supported BASE. */ | |
b0ab8123 | 2286 | static int |
a108c10b PE |
2287 | digit_to_number (int character, int base) |
2288 | { | |
2289 | int digit; | |
2290 | ||
2291 | if ('0' <= character && character <= '9') | |
2292 | digit = character - '0'; | |
2293 | else if ('a' <= character && character <= 'z') | |
2294 | digit = character - 'a' + 10; | |
2295 | else if ('A' <= character && character <= 'Z') | |
2296 | digit = character - 'A' + 10; | |
2297 | else | |
2298 | return -2; | |
2299 | ||
2300 | return digit < base ? digit : -1; | |
2301 | } | |
2302 | ||
bf5d1a17 GM |
2303 | /* Read an integer in radix RADIX using READCHARFUN to read |
2304 | characters. RADIX must be in the interval [2..36]; if it isn't, a | |
2305 | read error is signaled . Value is the integer read. Signals an | |
2306 | error if encountering invalid read syntax or if RADIX is out of | |
2307 | range. */ | |
2308 | ||
2309 | static Lisp_Object | |
8b9ac8b4 | 2310 | read_integer (Lisp_Object readcharfun, EMACS_INT radix) |
bf5d1a17 | 2311 | { |
8b9ac8b4 PE |
2312 | /* Room for sign, leading 0, other digits, trailing null byte. |
2313 | Also, room for invalid syntax diagnostic. */ | |
2314 | char buf[max (1 + 1 + sizeof (uintmax_t) * CHAR_BIT + 1, | |
2315 | sizeof "integer, radix " + INT_STRLEN_BOUND (EMACS_INT))]; | |
a108c10b PE |
2316 | |
2317 | int valid = -1; /* 1 if valid, 0 if not, -1 if incomplete. */ | |
bf5d1a17 GM |
2318 | |
2319 | if (radix < 2 || radix > 36) | |
a108c10b | 2320 | valid = 0; |
bf5d1a17 GM |
2321 | else |
2322 | { | |
a108c10b PE |
2323 | char *p = buf; |
2324 | int c, digit; | |
bf5d1a17 GM |
2325 | |
2326 | c = READCHAR; | |
a108c10b | 2327 | if (c == '-' || c == '+') |
bf5d1a17 | 2328 | { |
a108c10b | 2329 | *p++ = c; |
bf5d1a17 | 2330 | c = READCHAR; |
bf5d1a17 | 2331 | } |
177c0ea7 | 2332 | |
a108c10b | 2333 | if (c == '0') |
bf5d1a17 | 2334 | { |
a108c10b PE |
2335 | *p++ = c; |
2336 | valid = 1; | |
bf5d1a17 | 2337 | |
a108c10b PE |
2338 | /* Ignore redundant leading zeros, so the buffer doesn't |
2339 | fill up with them. */ | |
2340 | do | |
2341 | c = READCHAR; | |
2342 | while (c == '0'); | |
2343 | } | |
2344 | ||
2345 | while (-1 <= (digit = digit_to_number (c, radix))) | |
2346 | { | |
2347 | if (digit == -1) | |
2348 | valid = 0; | |
2349 | if (valid < 0) | |
2350 | valid = 1; | |
2351 | ||
2352 | if (p < buf + sizeof buf - 1) | |
2353 | *p++ = c; | |
2354 | else | |
2355 | valid = 0; | |
bf5d1a17 | 2356 | |
bf5d1a17 GM |
2357 | c = READCHAR; |
2358 | } | |
a108c10b | 2359 | |
0a6a104b | 2360 | UNREAD (c); |
a108c10b | 2361 | *p = '\0'; |
bf5d1a17 GM |
2362 | } |
2363 | ||
a108c10b | 2364 | if (! valid) |
bf5d1a17 | 2365 | { |
8b9ac8b4 | 2366 | sprintf (buf, "integer, radix %"pI"d", radix); |
e4d29b33 | 2367 | invalid_syntax (buf); |
bf5d1a17 GM |
2368 | } |
2369 | ||
a108c10b | 2370 | return string_to_number (buf, radix, 0); |
bf5d1a17 GM |
2371 | } |
2372 | ||
2373 | ||
6428369f KH |
2374 | /* If the next token is ')' or ']' or '.', we store that character |
2375 | in *PCH and the return value is not interesting. Else, we store | |
17634846 RS |
2376 | zero in *PCH and we read and return one lisp object. |
2377 | ||
2378 | FIRST_IN_LIST is nonzero if this is the first element of a list. */ | |
2379 | ||
078e7b4a | 2380 | static Lisp_Object |
971de7fb | 2381 | read1 (register Lisp_Object readcharfun, int *pch, int first_in_list) |
078e7b4a | 2382 | { |
fce31d69 PE |
2383 | int c; |
2384 | bool uninterned_symbol = 0; | |
2385 | bool multibyte; | |
4ad679f9 | 2386 | |
6428369f | 2387 | *pch = 0; |
8792be66 | 2388 | load_each_byte = 0; |
078e7b4a JB |
2389 | |
2390 | retry: | |
2391 | ||
1202434b | 2392 | c = READCHAR_REPORT_MULTIBYTE (&multibyte); |
9c97398c GM |
2393 | if (c < 0) |
2394 | end_of_file_error (); | |
078e7b4a JB |
2395 | |
2396 | switch (c) | |
2397 | { | |
2398 | case '(': | |
2399 | return read_list (0, readcharfun); | |
2400 | ||
2401 | case '[': | |
c15cfd1f | 2402 | return read_vector (readcharfun, 0); |
078e7b4a JB |
2403 | |
2404 | case ')': | |
2405 | case ']': | |
078e7b4a | 2406 | { |
6428369f KH |
2407 | *pch = c; |
2408 | return Qnil; | |
078e7b4a JB |
2409 | } |
2410 | ||
2411 | case '#': | |
200f684e | 2412 | c = READCHAR; |
f19a0f5b TZ |
2413 | if (c == 's') |
2414 | { | |
2415 | c = READCHAR; | |
2416 | if (c == '(') | |
2417 | { | |
2418 | /* Accept extended format for hashtables (extensible to | |
2419 | other types), e.g. | |
48def666 | 2420 | #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */ |
f19a0f5b TZ |
2421 | Lisp_Object tmp = read_list (0, readcharfun); |
2422 | Lisp_Object head = CAR_SAFE (tmp); | |
2423 | Lisp_Object data = Qnil; | |
2424 | Lisp_Object val = Qnil; | |
2425 | /* The size is 2 * number of allowed keywords to | |
48def666 | 2426 | make-hash-table. */ |
9735b9ce | 2427 | Lisp_Object params[10]; |
f19a0f5b TZ |
2428 | Lisp_Object ht; |
2429 | Lisp_Object key = Qnil; | |
2430 | int param_count = 0; | |
9735b9ce | 2431 | |
f19a0f5b TZ |
2432 | if (!EQ (head, Qhash_table)) |
2433 | error ("Invalid extended read marker at head of #s list " | |
2434 | "(only hash-table allowed)"); | |
9735b9ce | 2435 | |
f19a0f5b TZ |
2436 | tmp = CDR_SAFE (tmp); |
2437 | ||
48def666 | 2438 | /* This is repetitive but fast and simple. */ |
f19a0f5b | 2439 | params[param_count] = QCsize; |
48def666 | 2440 | params[param_count + 1] = Fplist_get (tmp, Qsize); |
5721b4ed AS |
2441 | if (!NILP (params[param_count + 1])) |
2442 | param_count += 2; | |
f19a0f5b TZ |
2443 | |
2444 | params[param_count] = QCtest; | |
48def666 | 2445 | params[param_count + 1] = Fplist_get (tmp, Qtest); |
5721b4ed AS |
2446 | if (!NILP (params[param_count + 1])) |
2447 | param_count += 2; | |
f19a0f5b TZ |
2448 | |
2449 | params[param_count] = QCweakness; | |
48def666 | 2450 | params[param_count + 1] = Fplist_get (tmp, Qweakness); |
5721b4ed AS |
2451 | if (!NILP (params[param_count + 1])) |
2452 | param_count += 2; | |
f19a0f5b TZ |
2453 | |
2454 | params[param_count] = QCrehash_size; | |
48def666 | 2455 | params[param_count + 1] = Fplist_get (tmp, Qrehash_size); |
5721b4ed AS |
2456 | if (!NILP (params[param_count + 1])) |
2457 | param_count += 2; | |
f19a0f5b TZ |
2458 | |
2459 | params[param_count] = QCrehash_threshold; | |
48def666 | 2460 | params[param_count + 1] = Fplist_get (tmp, Qrehash_threshold); |
5721b4ed AS |
2461 | if (!NILP (params[param_count + 1])) |
2462 | param_count += 2; | |
f19a0f5b | 2463 | |
48def666 | 2464 | /* This is the hashtable data. */ |
f19a0f5b TZ |
2465 | data = Fplist_get (tmp, Qdata); |
2466 | ||
48def666 | 2467 | /* Now use params to make a new hashtable and fill it. */ |
f19a0f5b | 2468 | ht = Fmake_hash_table (param_count, params); |
9735b9ce | 2469 | |
f19a0f5b TZ |
2470 | while (CONSP (data)) |
2471 | { | |
2472 | key = XCAR (data); | |
2473 | data = XCDR (data); | |
2474 | if (!CONSP (data)) | |
2475 | error ("Odd number of elements in hashtable data"); | |
2476 | val = XCAR (data); | |
2477 | data = XCDR (data); | |
2478 | Fputhash (key, val, ht); | |
2479 | } | |
9735b9ce | 2480 | |
f19a0f5b TZ |
2481 | return ht; |
2482 | } | |
5721b4ed | 2483 | UNREAD (c); |
e4d29b33 | 2484 | invalid_syntax ("#"); |
f19a0f5b | 2485 | } |
c2390933 RS |
2486 | if (c == '^') |
2487 | { | |
2488 | c = READCHAR; | |
2489 | if (c == '[') | |
2490 | { | |
2491 | Lisp_Object tmp; | |
c15cfd1f | 2492 | tmp = read_vector (readcharfun, 0); |
77b37c05 | 2493 | if (ASIZE (tmp) < CHAR_TABLE_STANDARD_SLOTS) |
c2390933 | 2494 | error ("Invalid size char-table"); |
985773c9 | 2495 | XSETPVECTYPE (XVECTOR (tmp), PVEC_CHAR_TABLE); |
c2390933 RS |
2496 | return tmp; |
2497 | } | |
3701b5de KH |
2498 | else if (c == '^') |
2499 | { | |
2500 | c = READCHAR; | |
2501 | if (c == '[') | |
2502 | { | |
2503 | Lisp_Object tmp; | |
d311d28c PE |
2504 | int depth; |
2505 | ptrdiff_t size; | |
8f924df7 | 2506 | |
c15cfd1f | 2507 | tmp = read_vector (readcharfun, 0); |
6efdadfd PE |
2508 | size = ASIZE (tmp); |
2509 | if (size == 0) | |
2510 | error ("Invalid size char-table"); | |
d311d28c | 2511 | if (! RANGED_INTEGERP (1, AREF (tmp, 0), 3)) |
1571601b KH |
2512 | error ("Invalid depth in char-table"); |
2513 | depth = XINT (AREF (tmp, 0)); | |
6efdadfd | 2514 | if (chartab_size[depth] != size - 2) |
3701b5de | 2515 | error ("Invalid size char-table"); |
985773c9 | 2516 | XSETPVECTYPE (XVECTOR (tmp), PVEC_SUB_CHAR_TABLE); |
3701b5de KH |
2517 | return tmp; |
2518 | } | |
e4d29b33 | 2519 | invalid_syntax ("#^^"); |
3701b5de | 2520 | } |
e4d29b33 | 2521 | invalid_syntax ("#^"); |
c2390933 RS |
2522 | } |
2523 | if (c == '&') | |
2524 | { | |
2525 | Lisp_Object length; | |
2526 | length = read1 (readcharfun, pch, first_in_list); | |
2527 | c = READCHAR; | |
2528 | if (c == '"') | |
2529 | { | |
2530 | Lisp_Object tmp, val; | |
82cb60d3 | 2531 | EMACS_INT size_in_chars |
d1ca81d9 AS |
2532 | = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2533 | / BOOL_VECTOR_BITS_PER_CHAR); | |
c2390933 RS |
2534 | |
2535 | UNREAD (c); | |
2536 | tmp = read1 (readcharfun, pch, first_in_list); | |
8792be66 | 2537 | if (STRING_MULTIBYTE (tmp) |
8f924df7 | 2538 | || (size_in_chars != SCHARS (tmp) |
8792be66 KH |
2539 | /* We used to print 1 char too many |
2540 | when the number of bits was a multiple of 8. | |
2541 | Accept such input in case it came from an old | |
2542 | version. */ | |
2543 | && ! (XFASTINT (length) | |
327719ee | 2544 | == (SCHARS (tmp) - 1) * BOOL_VECTOR_BITS_PER_CHAR))) |
e4d29b33 | 2545 | invalid_syntax ("#&..."); |
177c0ea7 | 2546 | |
c2390933 | 2547 | val = Fmake_bool_vector (length, Qnil); |
72af86bd | 2548 | memcpy (XBOOL_VECTOR (val)->data, SDATA (tmp), size_in_chars); |
67d3b149 | 2549 | /* Clear the extraneous bits in the last byte. */ |
d1ca81d9 | 2550 | if (XINT (length) != size_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
67d3b149 | 2551 | XBOOL_VECTOR (val)->data[size_in_chars - 1] |
d1ca81d9 | 2552 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
c2390933 RS |
2553 | return val; |
2554 | } | |
e4d29b33 | 2555 | invalid_syntax ("#&..."); |
c2390933 | 2556 | } |
200f684e | 2557 | if (c == '[') |
876c194c SM |
2558 | { |
2559 | /* Accept compiled functions at read-time so that we don't have to | |
2560 | build them using function calls. */ | |
2561 | Lisp_Object tmp; | |
2562 | tmp = read_vector (readcharfun, 1); | |
3017f87f SM |
2563 | make_byte_code (XVECTOR (tmp)); |
2564 | return tmp; | |
876c194c | 2565 | } |
748ef62f RS |
2566 | if (c == '(') |
2567 | { | |
2568 | Lisp_Object tmp; | |
2569 | struct gcpro gcpro1; | |
e28552a4 | 2570 | int ch; |
748ef62f RS |
2571 | |
2572 | /* Read the string itself. */ | |
17634846 | 2573 | tmp = read1 (readcharfun, &ch, 0); |
6428369f | 2574 | if (ch != 0 || !STRINGP (tmp)) |
e4d29b33 | 2575 | invalid_syntax ("#"); |
748ef62f RS |
2576 | GCPRO1 (tmp); |
2577 | /* Read the intervals and their properties. */ | |
2578 | while (1) | |
2579 | { | |
2580 | Lisp_Object beg, end, plist; | |
2581 | ||
17634846 | 2582 | beg = read1 (readcharfun, &ch, 0); |
7ee3bd7b | 2583 | end = plist = Qnil; |
6428369f KH |
2584 | if (ch == ')') |
2585 | break; | |
2586 | if (ch == 0) | |
17634846 | 2587 | end = read1 (readcharfun, &ch, 0); |
6428369f | 2588 | if (ch == 0) |
17634846 | 2589 | plist = read1 (readcharfun, &ch, 0); |
6428369f | 2590 | if (ch) |
e4d29b33 | 2591 | invalid_syntax ("Invalid string property list"); |
748ef62f RS |
2592 | Fset_text_properties (beg, end, plist, tmp); |
2593 | } | |
2594 | UNGCPRO; | |
2595 | return tmp; | |
2596 | } | |
177c0ea7 | 2597 | |
20ea2964 RS |
2598 | /* #@NUMBER is used to skip NUMBER following characters. |
2599 | That's used in .elc files to skip over doc strings | |
2600 | and function definitions. */ | |
2601 | if (c == '@') | |
2602 | { | |
bfbbd7e7 PE |
2603 | enum { extra = 100 }; |
2604 | ptrdiff_t i, nskip = 0; | |
20ea2964 | 2605 | |
8792be66 | 2606 | load_each_byte = 1; |
20ea2964 RS |
2607 | /* Read a decimal integer. */ |
2608 | while ((c = READCHAR) >= 0 | |
2609 | && c >= '0' && c <= '9') | |
2610 | { | |
bfbbd7e7 PE |
2611 | if ((STRING_BYTES_BOUND - extra) / 10 <= nskip) |
2612 | string_overflow (); | |
20ea2964 RS |
2613 | nskip *= 10; |
2614 | nskip += c - '0'; | |
2615 | } | |
0a6a104b | 2616 | UNREAD (c); |
177c0ea7 | 2617 | |
8792be66 KH |
2618 | if (load_force_doc_strings |
2619 | && (EQ (readcharfun, Qget_file_char) | |
2620 | || EQ (readcharfun, Qget_emacs_mule_file_char))) | |
b2a30870 RS |
2621 | { |
2622 | /* If we are supposed to force doc strings into core right now, | |
2623 | record the last string that we skipped, | |
2624 | and record where in the file it comes from. */ | |
c15cfd1f RS |
2625 | |
2626 | /* But first exchange saved_doc_string | |
2627 | with prev_saved_doc_string, so we save two strings. */ | |
2628 | { | |
2629 | char *temp = saved_doc_string; | |
bfbbd7e7 | 2630 | ptrdiff_t temp_size = saved_doc_string_size; |
68c45bf0 | 2631 | file_offset temp_pos = saved_doc_string_position; |
bfbbd7e7 | 2632 | ptrdiff_t temp_len = saved_doc_string_length; |
c15cfd1f RS |
2633 | |
2634 | saved_doc_string = prev_saved_doc_string; | |
2635 | saved_doc_string_size = prev_saved_doc_string_size; | |
2636 | saved_doc_string_position = prev_saved_doc_string_position; | |
2637 | saved_doc_string_length = prev_saved_doc_string_length; | |
2638 | ||
2639 | prev_saved_doc_string = temp; | |
2640 | prev_saved_doc_string_size = temp_size; | |
2641 | prev_saved_doc_string_position = temp_pos; | |
2642 | prev_saved_doc_string_length = temp_len; | |
2643 | } | |
2644 | ||
b2a30870 RS |
2645 | if (saved_doc_string_size == 0) |
2646 | { | |
23f86fce | 2647 | saved_doc_string = xmalloc (nskip + extra); |
bfbbd7e7 | 2648 | saved_doc_string_size = nskip + extra; |
b2a30870 RS |
2649 | } |
2650 | if (nskip > saved_doc_string_size) | |
2651 | { | |
38182d90 | 2652 | saved_doc_string = xrealloc (saved_doc_string, nskip + extra); |
37d0112b | 2653 | saved_doc_string_size = nskip + extra; |
b2a30870 RS |
2654 | } |
2655 | ||
68c45bf0 | 2656 | saved_doc_string_position = file_tell (instream); |
b2a30870 RS |
2657 | |
2658 | /* Copy that many characters into saved_doc_string. */ | |
2659 | for (i = 0; i < nskip && c >= 0; i++) | |
2660 | saved_doc_string[i] = c = READCHAR; | |
2661 | ||
2662 | saved_doc_string_length = i; | |
2663 | } | |
2664 | else | |
b2a30870 RS |
2665 | { |
2666 | /* Skip that many characters. */ | |
2667 | for (i = 0; i < nskip && c >= 0; i++) | |
2668 | c = READCHAR; | |
2669 | } | |
d49f0c1a | 2670 | |
8792be66 | 2671 | load_each_byte = 0; |
20ea2964 RS |
2672 | goto retry; |
2673 | } | |
e2518d02 RS |
2674 | if (c == '!') |
2675 | { | |
2676 | /* #! appears at the beginning of an executable file. | |
2677 | Skip the first line. */ | |
225c7a07 | 2678 | while (c != '\n' && c >= 0) |
e2518d02 RS |
2679 | c = READCHAR; |
2680 | goto retry; | |
2681 | } | |
20ea2964 RS |
2682 | if (c == '$') |
2683 | return Vload_file_name; | |
2b6cae0c RS |
2684 | if (c == '\'') |
2685 | return Fcons (Qfunction, Fcons (read0 (readcharfun), Qnil)); | |
4ad679f9 EN |
2686 | /* #:foo is the uninterned symbol named foo. */ |
2687 | if (c == ':') | |
2688 | { | |
2689 | uninterned_symbol = 1; | |
2690 | c = READCHAR; | |
52968808 | 2691 | if (!(c > 040 |
ed497dd4 | 2692 | && c != 0xa0 /* NBSP */ |
52968808 | 2693 | && (c >= 0200 |
0a6a104b | 2694 | || strchr ("\"';()[]#`,", c) == NULL))) |
52968808 AS |
2695 | { |
2696 | /* No symbol character follows, this is the empty | |
2697 | symbol. */ | |
0a6a104b | 2698 | UNREAD (c); |
4a7edc24 | 2699 | return Fmake_symbol (empty_unibyte_string); |
52968808 AS |
2700 | } |
2701 | goto read_symbol; | |
4ad679f9 | 2702 | } |
9a79b20c AS |
2703 | /* ## is the empty symbol. */ |
2704 | if (c == '#') | |
4a7edc24 | 2705 | return Fintern (empty_unibyte_string, Qnil); |
4ad679f9 EN |
2706 | /* Reader forms that can reuse previously read objects. */ |
2707 | if (c >= '0' && c <= '9') | |
2708 | { | |
8b9ac8b4 | 2709 | EMACS_INT n = 0; |
4ad679f9 | 2710 | Lisp_Object tem; |
2b6cae0c | 2711 | |
4ad679f9 EN |
2712 | /* Read a non-negative integer. */ |
2713 | while (c >= '0' && c <= '9') | |
2714 | { | |
8b9ac8b4 PE |
2715 | if (MOST_POSITIVE_FIXNUM / 10 < n |
2716 | || MOST_POSITIVE_FIXNUM < n * 10 + c - '0') | |
2717 | n = MOST_POSITIVE_FIXNUM + 1; | |
2718 | else | |
2719 | n = n * 10 + c - '0'; | |
4ad679f9 EN |
2720 | c = READCHAR; |
2721 | } | |
8b9ac8b4 PE |
2722 | |
2723 | if (n <= MOST_POSITIVE_FIXNUM) | |
4ad679f9 | 2724 | { |
8b9ac8b4 PE |
2725 | if (c == 'r' || c == 'R') |
2726 | return read_integer (readcharfun, n); | |
9e062b6c | 2727 | |
8b9ac8b4 PE |
2728 | if (! NILP (Vread_circle)) |
2729 | { | |
2730 | /* #n=object returns object, but associates it with | |
2731 | n for #n#. */ | |
2732 | if (c == '=') | |
2733 | { | |
48def666 | 2734 | /* Make a placeholder for #n# to use temporarily. */ |
8b9ac8b4 PE |
2735 | Lisp_Object placeholder; |
2736 | Lisp_Object cell; | |
9e062b6c | 2737 | |
8b9ac8b4 PE |
2738 | placeholder = Fcons (Qnil, Qnil); |
2739 | cell = Fcons (make_number (n), placeholder); | |
2740 | read_objects = Fcons (cell, read_objects); | |
9e062b6c | 2741 | |
48def666 | 2742 | /* Read the object itself. */ |
8b9ac8b4 | 2743 | tem = read0 (readcharfun); |
9e062b6c | 2744 | |
48def666 | 2745 | /* Now put it everywhere the placeholder was... */ |
8b9ac8b4 | 2746 | substitute_object_in_subtree (tem, placeholder); |
177c0ea7 | 2747 | |
8b9ac8b4 PE |
2748 | /* ...and #n# will use the real value from now on. */ |
2749 | Fsetcdr (cell, tem); | |
177c0ea7 | 2750 | |
8b9ac8b4 PE |
2751 | return tem; |
2752 | } | |
2753 | ||
2754 | /* #n# returns a previously read object. */ | |
2755 | if (c == '#') | |
2756 | { | |
2757 | tem = Fassq (make_number (n), read_objects); | |
2758 | if (CONSP (tem)) | |
2759 | return XCDR (tem); | |
2760 | } | |
2761 | } | |
2762 | } | |
4ad679f9 EN |
2763 | /* Fall through to error message. */ |
2764 | } | |
bf5d1a17 GM |
2765 | else if (c == 'x' || c == 'X') |
2766 | return read_integer (readcharfun, 16); | |
2767 | else if (c == 'o' || c == 'O') | |
2768 | return read_integer (readcharfun, 8); | |
2769 | else if (c == 'b' || c == 'B') | |
2770 | return read_integer (readcharfun, 2); | |
20ea2964 | 2771 | |
200f684e | 2772 | UNREAD (c); |
e4d29b33 | 2773 | invalid_syntax ("#"); |
078e7b4a JB |
2774 | |
2775 | case ';': | |
2776 | while ((c = READCHAR) >= 0 && c != '\n'); | |
2777 | goto retry; | |
2778 | ||
2779 | case '\'': | |
2780 | { | |
2781 | return Fcons (Qquote, Fcons (read0 (readcharfun), Qnil)); | |
2782 | } | |
2783 | ||
17634846 | 2784 | case '`': |
9a39b306 TO |
2785 | { |
2786 | int next_char = READCHAR; | |
2787 | UNREAD (next_char); | |
2788 | /* Transition from old-style to new-style: | |
2789 | If we see "(`" it used to mean old-style, which usually works | |
2790 | fine because ` should almost never appear in such a position | |
2791 | for new-style. But occasionally we need "(`" to mean new | |
2792 | style, so we try to distinguish the two by the fact that we | |
2793 | can either write "( `foo" or "(` foo", where the first | |
2794 | intends to use new-style whereas the second intends to use | |
2795 | old-style. For Emacs-25, we should completely remove this | |
2796 | first_in_list exception (old-style can still be obtained via | |
2797 | "(\`" anyway). */ | |
bba3e508 | 2798 | if (!new_backquote_flag && first_in_list && next_char == ' ') |
9a39b306 TO |
2799 | { |
2800 | Vold_style_backquotes = Qt; | |
2801 | goto default_label; | |
2802 | } | |
2803 | else | |
2804 | { | |
2805 | Lisp_Object value; | |
17634846 | 2806 | |
9a39b306 TO |
2807 | new_backquote_flag++; |
2808 | value = read0 (readcharfun); | |
2809 | new_backquote_flag--; | |
17634846 | 2810 | |
9a39b306 TO |
2811 | return Fcons (Qbackquote, Fcons (value, Qnil)); |
2812 | } | |
2813 | } | |
17634846 | 2814 | case ',': |
bba3e508 SM |
2815 | { |
2816 | int next_char = READCHAR; | |
2817 | UNREAD (next_char); | |
2818 | /* Transition from old-style to new-style: | |
2819 | It used to be impossible to have a new-style , other than within | |
2820 | a new-style `. This is sufficient when ` and , are used in the | |
2821 | normal way, but ` and , can also appear in args to macros that | |
2822 | will not interpret them in the usual way, in which case , may be | |
2823 | used without any ` anywhere near. | |
2824 | So we now use the same heuristic as for backquote: old-style | |
2825 | unquotes are only recognized when first on a list, and when | |
2826 | followed by a space. | |
333f9019 | 2827 | Because it's more difficult to peek 2 chars ahead, a new-style |
bba3e508 SM |
2828 | ,@ can still not be used outside of a `, unless it's in the middle |
2829 | of a list. */ | |
2830 | if (new_backquote_flag | |
2831 | || !first_in_list | |
2832 | || (next_char != ' ' && next_char != '@')) | |
2833 | { | |
2834 | Lisp_Object comma_type = Qnil; | |
2835 | Lisp_Object value; | |
2836 | int ch = READCHAR; | |
17634846 | 2837 | |
bba3e508 SM |
2838 | if (ch == '@') |
2839 | comma_type = Qcomma_at; | |
2840 | else if (ch == '.') | |
2841 | comma_type = Qcomma_dot; | |
2842 | else | |
2843 | { | |
2844 | if (ch >= 0) UNREAD (ch); | |
2845 | comma_type = Qcomma; | |
2846 | } | |
17634846 | 2847 | |
bba3e508 SM |
2848 | value = read0 (readcharfun); |
2849 | return Fcons (comma_type, Fcons (value, Qnil)); | |
2850 | } | |
2851 | else | |
2852 | { | |
2853 | Vold_style_backquotes = Qt; | |
2854 | goto default_label; | |
2855 | } | |
2856 | } | |
078e7b4a JB |
2857 | case '?': |
2858 | { | |
8792be66 | 2859 | int modifiers; |
df9c2be7 KS |
2860 | int next_char; |
2861 | int ok; | |
f6f79b37 | 2862 | |
078e7b4a | 2863 | c = READCHAR; |
9c97398c GM |
2864 | if (c < 0) |
2865 | end_of_file_error (); | |
078e7b4a | 2866 | |
b9284371 KS |
2867 | /* Accept `single space' syntax like (list ? x) where the |
2868 | whitespace character is SPC or TAB. | |
2869 | Other literal whitespace like NL, CR, and FF are not accepted, | |
2870 | as there are well-established escape sequences for these. */ | |
2871 | if (c == ' ' || c == '\t') | |
2872 | return make_number (c); | |
2873 | ||
078e7b4a | 2874 | if (c == '\\') |
8792be66 KH |
2875 | c = read_escape (readcharfun, 0); |
2876 | modifiers = c & CHAR_MODIFIER_MASK; | |
2877 | c &= ~CHAR_MODIFIER_MASK; | |
2878 | if (CHAR_BYTE8_P (c)) | |
2879 | c = CHAR_TO_BYTE8 (c); | |
2880 | c |= modifiers; | |
078e7b4a | 2881 | |
df9c2be7 | 2882 | next_char = READCHAR; |
bba3e508 SM |
2883 | ok = (next_char <= 040 |
2884 | || (next_char < 0200 | |
0a6a104b | 2885 | && strchr ("\"';()[]#?`,.", next_char) != NULL)); |
df9c2be7 | 2886 | UNREAD (next_char); |
336d4a9c KS |
2887 | if (ok) |
2888 | return make_number (c); | |
37cd4238 | 2889 | |
e4d29b33 | 2890 | invalid_syntax ("?"); |
078e7b4a JB |
2891 | } |
2892 | ||
00a9a935 | 2893 | case '"': |
078e7b4a | 2894 | { |
a742d646 GM |
2895 | char *p = read_buffer; |
2896 | char *end = read_buffer + read_buffer_size; | |
0902fe45 | 2897 | register int ch; |
1571601b KH |
2898 | /* Nonzero if we saw an escape sequence specifying |
2899 | a multibyte character. */ | |
e7fc914b | 2900 | int force_multibyte = 0; |
1571601b | 2901 | /* Nonzero if we saw an escape sequence specifying |
e7fc914b KH |
2902 | a single-byte character. */ |
2903 | int force_singlebyte = 0; | |
078e7b4a | 2904 | int cancel = 0; |
82cb60d3 | 2905 | ptrdiff_t nchars = 0; |
078e7b4a | 2906 | |
0902fe45 PE |
2907 | while ((ch = READCHAR) >= 0 |
2908 | && ch != '\"') | |
078e7b4a | 2909 | { |
449fea39 | 2910 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 2911 | { |
82cb60d3 | 2912 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
2913 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
2914 | memory_full (SIZE_MAX); | |
38182d90 | 2915 | read_buffer = xrealloc (read_buffer, read_buffer_size * 2); |
37d0112b | 2916 | read_buffer_size *= 2; |
5d65df0d | 2917 | p = read_buffer + offset; |
078e7b4a JB |
2918 | end = read_buffer + read_buffer_size; |
2919 | } | |
bed23cb2 | 2920 | |
0902fe45 | 2921 | if (ch == '\\') |
03e88613 | 2922 | { |
1571601b | 2923 | int modifiers; |
f6f79b37 | 2924 | |
0902fe45 | 2925 | ch = read_escape (readcharfun, 1); |
bed23cb2 | 2926 | |
48def666 | 2927 | /* CH is -1 if \ newline has just been seen. */ |
0902fe45 | 2928 | if (ch == -1) |
03e88613 | 2929 | { |
bed23cb2 RS |
2930 | if (p == read_buffer) |
2931 | cancel = 1; | |
03e88613 RS |
2932 | continue; |
2933 | } | |
bed23cb2 | 2934 | |
0902fe45 PE |
2935 | modifiers = ch & CHAR_MODIFIER_MASK; |
2936 | ch = ch & ~CHAR_MODIFIER_MASK; | |
1571601b | 2937 | |
0902fe45 | 2938 | if (CHAR_BYTE8_P (ch)) |
e7fc914b | 2939 | force_singlebyte = 1; |
0902fe45 | 2940 | else if (! ASCII_CHAR_P (ch)) |
f6f79b37 | 2941 | force_multibyte = 1; |
48def666 | 2942 | else /* I.e. ASCII_CHAR_P (ch). */ |
1571601b KH |
2943 | { |
2944 | /* Allow `\C- ' and `\C-?'. */ | |
2945 | if (modifiers == CHAR_CTL) | |
2946 | { | |
0902fe45 PE |
2947 | if (ch == ' ') |
2948 | ch = 0, modifiers = 0; | |
2949 | else if (ch == '?') | |
2950 | ch = 127, modifiers = 0; | |
1571601b KH |
2951 | } |
2952 | if (modifiers & CHAR_SHIFT) | |
2953 | { | |
2954 | /* Shift modifier is valid only with [A-Za-z]. */ | |
0902fe45 | 2955 | if (ch >= 'A' && ch <= 'Z') |
1571601b | 2956 | modifiers &= ~CHAR_SHIFT; |
0902fe45 PE |
2957 | else if (ch >= 'a' && ch <= 'z') |
2958 | ch -= ('a' - 'A'), modifiers &= ~CHAR_SHIFT; | |
1571601b KH |
2959 | } |
2960 | ||
2961 | if (modifiers & CHAR_META) | |
2962 | { | |
2963 | /* Move the meta bit to the right place for a | |
2964 | string. */ | |
2965 | modifiers &= ~CHAR_META; | |
0902fe45 | 2966 | ch = BYTE8_TO_CHAR (ch | 0x80); |
1571601b KH |
2967 | force_singlebyte = 1; |
2968 | } | |
2969 | } | |
5150eeec | 2970 | |
1571601b KH |
2971 | /* Any modifiers remaining are invalid. */ |
2972 | if (modifiers) | |
2973 | error ("Invalid modifier in string"); | |
0902fe45 | 2974 | p += CHAR_STRING (ch, (unsigned char *) p); |
078e7b4a | 2975 | } |
8792be66 | 2976 | else |
5150eeec | 2977 | { |
0902fe45 PE |
2978 | p += CHAR_STRING (ch, (unsigned char *) p); |
2979 | if (CHAR_BYTE8_P (ch)) | |
988f7a0c | 2980 | force_singlebyte = 1; |
0902fe45 | 2981 | else if (! ASCII_CHAR_P (ch)) |
988f7a0c | 2982 | force_multibyte = 1; |
f943104a | 2983 | } |
5150eeec | 2984 | nchars++; |
078e7b4a | 2985 | } |
5150eeec | 2986 | |
0902fe45 | 2987 | if (ch < 0) |
9c97398c | 2988 | end_of_file_error (); |
078e7b4a JB |
2989 | |
2990 | /* If purifying, and string starts with \ newline, | |
2991 | return zero instead. This is for doc strings | |
61b108cc | 2992 | that we are really going to find in etc/DOC.nn.nn. */ |
265a9e55 | 2993 | if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel) |
078e7b4a JB |
2994 | return make_number (0); |
2995 | ||
4cfd81f6 | 2996 | if (! force_multibyte && force_singlebyte) |
a742d646 | 2997 | { |
4cfd81f6 PE |
2998 | /* READ_BUFFER contains raw 8-bit bytes and no multibyte |
2999 | forms. Convert it to unibyte. */ | |
4a25e32a PE |
3000 | nchars = str_as_unibyte ((unsigned char *) read_buffer, |
3001 | p - read_buffer); | |
1571601b | 3002 | p = read_buffer + nchars; |
a742d646 | 3003 | } |
e7fc914b | 3004 | |
491f16a2 | 3005 | return make_specified_string (read_buffer, nchars, p - read_buffer, |
1571601b KH |
3006 | (force_multibyte |
3007 | || (p - read_buffer != nchars))); | |
078e7b4a JB |
3008 | } |
3009 | ||
109d300c JB |
3010 | case '.': |
3011 | { | |
109d300c JB |
3012 | int next_char = READCHAR; |
3013 | UNREAD (next_char); | |
3014 | ||
035eec48 | 3015 | if (next_char <= 040 |
e613ea97 | 3016 | || (next_char < 0200 |
0a6a104b | 3017 | && strchr ("\"';([#?`,", next_char) != NULL)) |
109d300c | 3018 | { |
6428369f KH |
3019 | *pch = c; |
3020 | return Qnil; | |
109d300c JB |
3021 | } |
3022 | ||
3023 | /* Otherwise, we fall through! Note that the atom-reading loop | |
3024 | below will now loop at least once, assuring that we will not | |
3025 | try to UNREAD two characters in a row. */ | |
3026 | } | |
078e7b4a | 3027 | default: |
17634846 | 3028 | default_label: |
88852d45 | 3029 | if (c <= 040) goto retry; |
ed497dd4 | 3030 | if (c == 0xa0) /* NBSP */ |
adef3de7 | 3031 | goto retry; |
52968808 AS |
3032 | |
3033 | read_symbol: | |
078e7b4a | 3034 | { |
38404229 | 3035 | char *p = read_buffer; |
481c6336 | 3036 | int quoted = 0; |
46cfea45 | 3037 | EMACS_INT start_position = readchar_count - 1; |
078e7b4a JB |
3038 | |
3039 | { | |
38404229 | 3040 | char *end = read_buffer + read_buffer_size; |
078e7b4a | 3041 | |
ef1b0ba7 | 3042 | do |
078e7b4a | 3043 | { |
449fea39 | 3044 | if (end - p < MAX_MULTIBYTE_LENGTH) |
078e7b4a | 3045 | { |
82cb60d3 | 3046 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3047 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3048 | memory_full (SIZE_MAX); | |
38182d90 | 3049 | read_buffer = xrealloc (read_buffer, read_buffer_size * 2); |
37d0112b | 3050 | read_buffer_size *= 2; |
5d65df0d | 3051 | p = read_buffer + offset; |
078e7b4a JB |
3052 | end = read_buffer + read_buffer_size; |
3053 | } | |
177c0ea7 | 3054 | |
078e7b4a | 3055 | if (c == '\\') |
481c6336 RS |
3056 | { |
3057 | c = READCHAR; | |
4ab11c09 GM |
3058 | if (c == -1) |
3059 | end_of_file_error (); | |
481c6336 RS |
3060 | quoted = 1; |
3061 | } | |
6f7f43d5 | 3062 | |
1202434b | 3063 | if (multibyte) |
4a25e32a | 3064 | p += CHAR_STRING (c, (unsigned char *) p); |
1202434b KH |
3065 | else |
3066 | *p++ = c; | |
078e7b4a | 3067 | c = READCHAR; |
0a6a104b AS |
3068 | } |
3069 | while (c > 040 | |
ed497dd4 | 3070 | && c != 0xa0 /* NBSP */ |
0a6a104b AS |
3071 | && (c >= 0200 |
3072 | || strchr ("\"';()[]#`,", c) == NULL)); | |
078e7b4a JB |
3073 | |
3074 | if (p == end) | |
3075 | { | |
82cb60d3 | 3076 | ptrdiff_t offset = p - read_buffer; |
20270765 PE |
3077 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 < read_buffer_size) |
3078 | memory_full (SIZE_MAX); | |
38182d90 | 3079 | read_buffer = xrealloc (read_buffer, read_buffer_size * 2); |
37d0112b | 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 | ||
61b108cc SM |
3103 | name = ((uninterned_symbol && ! NILP (Vpurify_flag) |
3104 | ? make_pure_string : make_specified_string) | |
3105 | (read_buffer, nchars, nbytes, multibyte)); | |
e93abe3d KH |
3106 | result = (uninterned_symbol ? Fmake_symbol (name) |
3107 | : Fintern (name, Qnil)); | |
1202434b | 3108 | |
abb13b09 CW |
3109 | if (EQ (Vread_with_symbol_positions, Qt) |
3110 | || EQ (Vread_with_symbol_positions, readcharfun)) | |
61b108cc SM |
3111 | Vread_symbol_positions_list |
3112 | = Fcons (Fcons (result, make_number (start_position)), | |
3113 | Vread_symbol_positions_list); | |
abb13b09 CW |
3114 | return result; |
3115 | } | |
078e7b4a JB |
3116 | } |
3117 | } | |
3118 | } | |
3119 | \f | |
9e062b6c | 3120 | |
48def666 | 3121 | /* List of nodes we've seen during substitute_object_in_subtree. */ |
9e062b6c RS |
3122 | static Lisp_Object seen_list; |
3123 | ||
3124 | static void | |
971de7fb | 3125 | substitute_object_in_subtree (Lisp_Object object, Lisp_Object placeholder) |
9e062b6c RS |
3126 | { |
3127 | Lisp_Object check_object; | |
3128 | ||
48def666 | 3129 | /* We haven't seen any objects when we start. */ |
9e062b6c RS |
3130 | seen_list = Qnil; |
3131 | ||
48def666 | 3132 | /* Make all the substitutions. */ |
9e062b6c RS |
3133 | check_object |
3134 | = substitute_object_recurse (object, placeholder, object); | |
177c0ea7 | 3135 | |
48def666 | 3136 | /* Clear seen_list because we're done with it. */ |
9e062b6c RS |
3137 | seen_list = Qnil; |
3138 | ||
3139 | /* The returned object here is expected to always eq the | |
48def666 | 3140 | original. */ |
9e062b6c RS |
3141 | if (!EQ (check_object, object)) |
3142 | error ("Unexpected mutation error in reader"); | |
3143 | } | |
3144 | ||
48def666 | 3145 | /* Feval doesn't get called from here, so no gc protection is needed. */ |
7a3d90dc SM |
3146 | #define SUBSTITUTE(get_val, set_val) \ |
3147 | do { \ | |
3148 | Lisp_Object old_value = get_val; \ | |
3149 | Lisp_Object true_value \ | |
3150 | = substitute_object_recurse (object, placeholder, \ | |
3151 | old_value); \ | |
3152 | \ | |
3153 | if (!EQ (old_value, true_value)) \ | |
3154 | { \ | |
3155 | set_val; \ | |
3156 | } \ | |
3157 | } while (0) | |
9e062b6c RS |
3158 | |
3159 | static Lisp_Object | |
971de7fb | 3160 | substitute_object_recurse (Lisp_Object object, Lisp_Object placeholder, Lisp_Object subtree) |
9e062b6c | 3161 | { |
48def666 | 3162 | /* If we find the placeholder, return the target object. */ |
9e062b6c RS |
3163 | if (EQ (placeholder, subtree)) |
3164 | return object; | |
3165 | ||
48def666 | 3166 | /* If we've been to this node before, don't explore it again. */ |
9e062b6c RS |
3167 | if (!EQ (Qnil, Fmemq (subtree, seen_list))) |
3168 | return subtree; | |
3169 | ||
3170 | /* If this node can be the entry point to a cycle, remember that | |
3171 | we've seen it. It can only be such an entry point if it was made | |
3172 | by #n=, which means that we can find it as a value in | |
3173 | read_objects. */ | |
3174 | if (!EQ (Qnil, Frassq (subtree, read_objects))) | |
3175 | seen_list = Fcons (subtree, seen_list); | |
177c0ea7 | 3176 | |
9e062b6c RS |
3177 | /* Recurse according to subtree's type. |
3178 | Every branch must return a Lisp_Object. */ | |
3179 | switch (XTYPE (subtree)) | |
3180 | { | |
3181 | case Lisp_Vectorlike: | |
3182 | { | |
82cb60d3 | 3183 | ptrdiff_t i, length = 0; |
7a3d90dc SM |
3184 | if (BOOL_VECTOR_P (subtree)) |
3185 | return subtree; /* No sub-objects anyway. */ | |
3186 | else if (CHAR_TABLE_P (subtree) || SUB_CHAR_TABLE_P (subtree) | |
3187 | || COMPILEDP (subtree)) | |
3188 | length = ASIZE (subtree) & PSEUDOVECTOR_SIZE_MASK; | |
3189 | else if (VECTORP (subtree)) | |
3190 | length = ASIZE (subtree); | |
3191 | else | |
3192 | /* An unknown pseudovector may contain non-Lisp fields, so we | |
3193 | can't just blindly traverse all its fields. We used to call | |
04bf5b65 | 3194 | `Flength' which signaled `sequencep', so I just preserved this |
7a3d90dc SM |
3195 | behavior. */ |
3196 | wrong_type_argument (Qsequencep, subtree); | |
3197 | ||
9e062b6c | 3198 | for (i = 0; i < length; i++) |
7a3d90dc SM |
3199 | SUBSTITUTE (AREF (subtree, i), |
3200 | ASET (subtree, i, true_value)); | |
9e062b6c RS |
3201 | return subtree; |
3202 | } | |
3203 | ||
3204 | case Lisp_Cons: | |
3205 | { | |
7a3d90dc SM |
3206 | SUBSTITUTE (XCAR (subtree), |
3207 | XSETCAR (subtree, true_value)); | |
3208 | SUBSTITUTE (XCDR (subtree), | |
3209 | XSETCDR (subtree, true_value)); | |
9e062b6c RS |
3210 | return subtree; |
3211 | } | |
3212 | ||
9e062b6c RS |
3213 | case Lisp_String: |
3214 | { | |
3215 | /* Check for text properties in each interval. | |
48def666 | 3216 | substitute_in_interval contains part of the logic. */ |
9e062b6c | 3217 | |
0c94c8d6 PE |
3218 | INTERVAL root_interval = string_intervals (subtree); |
3219 | Lisp_Object arg = Fcons (object, placeholder); | |
177c0ea7 | 3220 | |
0d74b006 SM |
3221 | traverse_intervals_noorder (root_interval, |
3222 | &substitute_in_interval, arg); | |
9e062b6c RS |
3223 | |
3224 | return subtree; | |
3225 | } | |
9e062b6c | 3226 | |
48def666 | 3227 | /* Other types don't recurse any further. */ |
9e062b6c RS |
3228 | default: |
3229 | return subtree; | |
3230 | } | |
3231 | } | |
3232 | ||
3233 | /* Helper function for substitute_object_recurse. */ | |
3234 | static void | |
971de7fb | 3235 | substitute_in_interval (INTERVAL interval, Lisp_Object arg) |
9e062b6c RS |
3236 | { |
3237 | Lisp_Object object = Fcar (arg); | |
3238 | Lisp_Object placeholder = Fcdr (arg); | |
3239 | ||
0c94c8d6 | 3240 | SUBSTITUTE (interval->plist, set_interval_plist (interval, true_value)); |
9e062b6c RS |
3241 | } |
3242 | ||
3243 | \f | |
078e7b4a JB |
3244 | #define LEAD_INT 1 |
3245 | #define DOT_CHAR 2 | |
3246 | #define TRAIL_INT 4 | |
452f4150 | 3247 | #define E_EXP 16 |
078e7b4a | 3248 | |
8b9587d7 | 3249 | |
452f4150 PE |
3250 | /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has |
3251 | integer syntax and fits in a fixnum, else return the nearest float if CP has | |
3252 | either floating point or integer syntax and BASE is 10, else return nil. If | |
3253 | IGNORE_TRAILING is nonzero, consider just the longest prefix of CP that has | |
3254 | valid floating point syntax. Signal an overflow if BASE is not 10 and the | |
3255 | number has integer syntax but does not fit. */ | |
8b9587d7 PE |
3256 | |
3257 | Lisp_Object | |
452f4150 | 3258 | string_to_number (char const *string, int base, int ignore_trailing) |
078e7b4a | 3259 | { |
a8fe7202 | 3260 | int state; |
452f4150 PE |
3261 | char const *cp = string; |
3262 | int leading_digit; | |
3263 | int float_syntax = 0; | |
3264 | double value = 0; | |
d8578e58 | 3265 | |
8b9587d7 PE |
3266 | /* Compute NaN and infinities using a variable, to cope with compilers that |
3267 | think they are smarter than we are. */ | |
3268 | double zero = 0; | |
3269 | ||
3270 | /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on | |
3271 | IEEE floating point hosts, and works around a formerly-common bug where | |
3272 | atof ("-0.0") drops the sign. */ | |
3273 | int negative = *cp == '-'; | |
3274 | ||
452f4150 PE |
3275 | int signedp = negative || *cp == '+'; |
3276 | cp += signedp; | |
8b9587d7 | 3277 | |
078e7b4a | 3278 | state = 0; |
078e7b4a | 3279 | |
452f4150 PE |
3280 | leading_digit = digit_to_number (*cp, base); |
3281 | if (0 <= leading_digit) | |
078e7b4a JB |
3282 | { |
3283 | state |= LEAD_INT; | |
452f4150 PE |
3284 | do |
3285 | ++cp; | |
3286 | while (0 <= digit_to_number (*cp, base)); | |
078e7b4a JB |
3287 | } |
3288 | if (*cp == '.') | |
3289 | { | |
3290 | state |= DOT_CHAR; | |
3291 | cp++; | |
3292 | } | |
078e7b4a | 3293 | |
452f4150 | 3294 | if (base == 10) |
eb659c41 | 3295 | { |
452f4150 PE |
3296 | if ('0' <= *cp && *cp <= '9') |
3297 | { | |
3298 | state |= TRAIL_INT; | |
3299 | do | |
3300 | cp++; | |
3301 | while ('0' <= *cp && *cp <= '9'); | |
3302 | } | |
3303 | if (*cp == 'e' || *cp == 'E') | |
3304 | { | |
3305 | char const *ecp = cp; | |
3306 | cp++; | |
3307 | if (*cp == '+' || *cp == '-') | |
3308 | cp++; | |
3309 | if ('0' <= *cp && *cp <= '9') | |
3310 | { | |
3311 | state |= E_EXP; | |
3312 | do | |
3313 | cp++; | |
3314 | while ('0' <= *cp && *cp <= '9'); | |
3315 | } | |
3316 | else if (cp[-1] == '+' | |
3317 | && cp[0] == 'I' && cp[1] == 'N' && cp[2] == 'F') | |
3318 | { | |
3319 | state |= E_EXP; | |
3320 | cp += 3; | |
3321 | value = 1.0 / zero; | |
3322 | } | |
3323 | else if (cp[-1] == '+' | |
3324 | && cp[0] == 'N' && cp[1] == 'a' && cp[2] == 'N') | |
3325 | { | |
3326 | state |= E_EXP; | |
3327 | cp += 3; | |
3328 | value = zero / zero; | |
3329 | ||
3330 | /* If that made a "negative" NaN, negate it. */ | |
3331 | { | |
3332 | int i; | |
3333 | union { double d; char c[sizeof (double)]; } | |
3334 | u_data, u_minus_zero; | |
3335 | u_data.d = value; | |
3336 | u_minus_zero.d = -0.0; | |
3337 | for (i = 0; i < sizeof (double); i++) | |
3338 | if (u_data.c[i] & u_minus_zero.c[i]) | |
3339 | { | |
3340 | value = -value; | |
3341 | break; | |
3342 | } | |
3343 | } | |
3344 | /* Now VALUE is a positive NaN. */ | |
3345 | } | |
3346 | else | |
3347 | cp = ecp; | |
3348 | } | |
3349 | ||
3350 | float_syntax = ((state & (DOT_CHAR|TRAIL_INT)) == (DOT_CHAR|TRAIL_INT) | |
3351 | || state == (LEAD_INT|E_EXP)); | |
eb659c41 | 3352 | } |
8b9587d7 | 3353 | |
452f4150 PE |
3354 | /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept |
3355 | any prefix that matches. Otherwise, the entire string must match. */ | |
3356 | if (! (ignore_trailing | |
3357 | ? ((state & LEAD_INT) != 0 || float_syntax) | |
3358 | : (!*cp && ((state & ~DOT_CHAR) == LEAD_INT || float_syntax)))) | |
3359 | return Qnil; | |
8b9587d7 | 3360 | |
d78050d6 PE |
3361 | /* If the number uses integer and not float syntax, and is in C-language |
3362 | range, use its value, preferably as a fixnum. */ | |
452f4150 PE |
3363 | if (0 <= leading_digit && ! float_syntax) |
3364 | { | |
d78050d6 PE |
3365 | uintmax_t n; |
3366 | ||
3367 | /* Fast special case for single-digit integers. This also avoids a | |
3368 | glitch when BASE is 16 and IGNORE_TRAILING is nonzero, because in that | |
3369 | case some versions of strtoumax accept numbers like "0x1" that Emacs | |
3370 | does not allow. */ | |
3371 | if (digit_to_number (string[signedp + 1], base) < 0) | |
3372 | return make_number (negative ? -leading_digit : leading_digit); | |
3373 | ||
3374 | errno = 0; | |
3375 | n = strtoumax (string + signedp, NULL, base); | |
3376 | if (errno == ERANGE) | |
452f4150 | 3377 | { |
d78050d6 PE |
3378 | /* Unfortunately there's no simple and accurate way to convert |
3379 | non-base-10 numbers that are out of C-language range. */ | |
3380 | if (base != 10) | |
f14ed477 | 3381 | xsignal1 (Qoverflow_error, build_string (string)); |
452f4150 | 3382 | } |
d78050d6 PE |
3383 | else if (n <= (negative ? -MOST_NEGATIVE_FIXNUM : MOST_POSITIVE_FIXNUM)) |
3384 | { | |
3385 | EMACS_INT signed_n = n; | |
3386 | return make_number (negative ? -signed_n : signed_n); | |
3387 | } | |
3388 | else | |
3389 | value = n; | |
452f4150 | 3390 | } |
8b9587d7 | 3391 | |
452f4150 PE |
3392 | /* Either the number uses float syntax, or it does not fit into a fixnum. |
3393 | Convert it from string to floating point, unless the value is already | |
d78050d6 PE |
3394 | known because it is an infinity, a NAN, or its absolute value fits in |
3395 | uintmax_t. */ | |
8b9587d7 | 3396 | if (! value) |
452f4150 PE |
3397 | value = atof (string + signedp); |
3398 | ||
d78050d6 | 3399 | return make_float (negative ? -value : value); |
078e7b4a | 3400 | } |
cc94f3b2 | 3401 | |
078e7b4a JB |
3402 | \f |
3403 | static Lisp_Object | |
876c194c | 3404 | read_vector (Lisp_Object readcharfun, int bytecodeflag) |
078e7b4a | 3405 | { |
82cb60d3 | 3406 | ptrdiff_t i, size; |
078e7b4a | 3407 | register Lisp_Object *ptr; |
c15cfd1f | 3408 | register Lisp_Object tem, item, vector; |
078e7b4a JB |
3409 | register struct Lisp_Cons *otem; |
3410 | Lisp_Object len; | |
3411 | ||
3412 | tem = read_list (1, readcharfun); | |
3413 | len = Flength (tem); | |
48def666 | 3414 | vector = Fmake_vector (len, Qnil); |
078e7b4a | 3415 | |
77b37c05 | 3416 | size = ASIZE (vector); |
078e7b4a JB |
3417 | ptr = XVECTOR (vector)->contents; |
3418 | for (i = 0; i < size; i++) | |
3419 | { | |
c15cfd1f RS |
3420 | item = Fcar (tem); |
3421 | /* If `load-force-doc-strings' is t when reading a lazily-loaded | |
3422 | bytecode object, the docstring containing the bytecode and | |
3423 | constants values must be treated as unibyte and passed to | |
3424 | Fread, to get the actual bytecode string and constants vector. */ | |
876c194c | 3425 | if (bytecodeflag && load_force_doc_strings) |
c15cfd1f RS |
3426 | { |
3427 | if (i == COMPILED_BYTECODE) | |
3428 | { | |
3429 | if (!STRINGP (item)) | |
6fa2b890 | 3430 | error ("Invalid byte code"); |
c15cfd1f RS |
3431 | |
3432 | /* Delay handling the bytecode slot until we know whether | |
3433 | it is lazily-loaded (we can tell by whether the | |
3434 | constants slot is nil). */ | |
086ca913 | 3435 | ASET (vector, COMPILED_CONSTANTS, item); |
c15cfd1f RS |
3436 | item = Qnil; |
3437 | } | |
3438 | else if (i == COMPILED_CONSTANTS) | |
3439 | { | |
3440 | Lisp_Object bytestr = ptr[COMPILED_CONSTANTS]; | |
3441 | ||
3442 | if (NILP (item)) | |
3443 | { | |
3444 | /* Coerce string to unibyte (like string-as-unibyte, | |
3445 | but without generating extra garbage and | |
3446 | guaranteeing no change in the contents). */ | |
bee91904 | 3447 | STRING_SET_CHARS (bytestr, SBYTES (bytestr)); |
d5db4077 | 3448 | STRING_SET_UNIBYTE (bytestr); |
c15cfd1f | 3449 | |
8792be66 | 3450 | item = Fread (Fcons (bytestr, readcharfun)); |
c15cfd1f | 3451 | if (!CONSP (item)) |
6fa2b890 | 3452 | error ("Invalid byte code"); |
c15cfd1f RS |
3453 | |
3454 | otem = XCONS (item); | |
c1d497be KR |
3455 | bytestr = XCAR (item); |
3456 | item = XCDR (item); | |
c15cfd1f RS |
3457 | free_cons (otem); |
3458 | } | |
3459 | ||
3460 | /* Now handle the bytecode slot. */ | |
086ca913 | 3461 | ASET (vector, COMPILED_BYTECODE, bytestr); |
c15cfd1f | 3462 | } |
8792be66 KH |
3463 | else if (i == COMPILED_DOC_STRING |
3464 | && STRINGP (item) | |
3465 | && ! STRING_MULTIBYTE (item)) | |
3466 | { | |
3467 | if (EQ (readcharfun, Qget_emacs_mule_file_char)) | |
3468 | item = Fdecode_coding_string (item, Qemacs_mule, Qnil, Qnil); | |
3469 | else | |
3470 | item = Fstring_as_multibyte (item); | |
3471 | } | |
c15cfd1f | 3472 | } |
086ca913 | 3473 | ASET (vector, i, item); |
078e7b4a JB |
3474 | otem = XCONS (tem); |
3475 | tem = Fcdr (tem); | |
3476 | free_cons (otem); | |
3477 | } | |
3478 | return vector; | |
3479 | } | |
177c0ea7 | 3480 | |
48def666 | 3481 | /* FLAG = 1 means check for ] to terminate rather than ) and . */ |
078e7b4a JB |
3482 | |
3483 | static Lisp_Object | |
971de7fb | 3484 | read_list (int flag, register Lisp_Object readcharfun) |
078e7b4a | 3485 | { |
078e7b4a JB |
3486 | Lisp_Object val, tail; |
3487 | register Lisp_Object elt, tem; | |
3488 | struct gcpro gcpro1, gcpro2; | |
821d417e | 3489 | /* 0 is the normal case. |
b2a30870 | 3490 | 1 means this list is a doc reference; replace it with the number 0. |
177c0ea7 | 3491 | 2 means this list is a doc reference; replace it with the doc string. */ |
821d417e | 3492 | int doc_reference = 0; |
078e7b4a | 3493 | |
17634846 RS |
3494 | /* Initialize this to 1 if we are reading a list. */ |
3495 | int first_in_list = flag <= 0; | |
3496 | ||
078e7b4a JB |
3497 | val = Qnil; |
3498 | tail = Qnil; | |
3499 | ||
3500 | while (1) | |
3501 | { | |
e28552a4 | 3502 | int ch; |
078e7b4a | 3503 | GCPRO2 (val, tail); |
17634846 | 3504 | elt = read1 (readcharfun, &ch, first_in_list); |
078e7b4a | 3505 | UNGCPRO; |
20ea2964 | 3506 | |
17634846 RS |
3507 | first_in_list = 0; |
3508 | ||
821d417e | 3509 | /* While building, if the list starts with #$, treat it specially. */ |
20ea2964 | 3510 | if (EQ (elt, Vload_file_name) |
d49f0c1a | 3511 | && ! NILP (elt) |
821d417e RS |
3512 | && !NILP (Vpurify_flag)) |
3513 | { | |
3514 | if (NILP (Vdoc_file_name)) | |
3515 | /* We have not yet called Snarf-documentation, so assume | |
3516 | this file is described in the DOC-MM.NN file | |
3517 | and Snarf-documentation will fill in the right value later. | |
3518 | For now, replace the whole list with 0. */ | |
3519 | doc_reference = 1; | |
3520 | else | |
3521 | /* We have already called Snarf-documentation, so make a relative | |
3522 | file name for this file, so it can be found properly | |
3523 | in the installed Lisp directory. | |
3524 | We don't use Fexpand_file_name because that would make | |
3525 | the directory absolute now. */ | |
3526 | elt = concat2 (build_string ("../lisp/"), | |
61b108cc | 3527 | Ffile_name_nondirectory (elt)); |
821d417e | 3528 | } |
b2a30870 | 3529 | else if (EQ (elt, Vload_file_name) |
d49f0c1a | 3530 | && ! NILP (elt) |
b2a30870 RS |
3531 | && load_force_doc_strings) |
3532 | doc_reference = 2; | |
20ea2964 | 3533 | |
6428369f | 3534 | if (ch) |
078e7b4a JB |
3535 | { |
3536 | if (flag > 0) | |
3537 | { | |
6428369f | 3538 | if (ch == ']') |
078e7b4a | 3539 | return val; |
e4d29b33 | 3540 | invalid_syntax (") or . in a vector"); |
078e7b4a | 3541 | } |
6428369f | 3542 | if (ch == ')') |
078e7b4a | 3543 | return val; |
6428369f | 3544 | if (ch == '.') |
078e7b4a JB |
3545 | { |
3546 | GCPRO2 (val, tail); | |
265a9e55 | 3547 | if (!NILP (tail)) |
f5df591a | 3548 | XSETCDR (tail, read0 (readcharfun)); |
078e7b4a JB |
3549 | else |
3550 | val = read0 (readcharfun); | |
17634846 | 3551 | read1 (readcharfun, &ch, 0); |
078e7b4a | 3552 | UNGCPRO; |
6428369f | 3553 | if (ch == ')') |
821d417e RS |
3554 | { |
3555 | if (doc_reference == 1) | |
3556 | return make_number (0); | |
b2a30870 RS |
3557 | if (doc_reference == 2) |
3558 | { | |
3559 | /* Get a doc string from the file we are loading. | |
8792be66 KH |
3560 | If it's in saved_doc_string, get it from there. |
3561 | ||
3562 | Here, we don't know if the string is a | |
3563 | bytecode string or a doc string. As a | |
3564 | bytecode string must be unibyte, we always | |
3565 | return a unibyte string. If it is actually a | |
3566 | doc string, caller must make it | |
3567 | multibyte. */ | |
8f924df7 | 3568 | |
bfbbd7e7 | 3569 | EMACS_INT pos = XINT (XCDR (val)); |
c15cfd1f RS |
3570 | /* Position is negative for user variables. */ |
3571 | if (pos < 0) pos = -pos; | |
b2a30870 RS |
3572 | if (pos >= saved_doc_string_position |
3573 | && pos < (saved_doc_string_position | |
3574 | + saved_doc_string_length)) | |
3575 | { | |
82cb60d3 PE |
3576 | ptrdiff_t start = pos - saved_doc_string_position; |
3577 | ptrdiff_t from, to; | |
b2a30870 RS |
3578 | |
3579 | /* Process quoting with ^A, | |
3580 | and find the end of the string, | |
3581 | which is marked with ^_ (037). */ | |
3582 | for (from = start, to = start; | |
3583 | saved_doc_string[from] != 037;) | |
3584 | { | |
3585 | int c = saved_doc_string[from++]; | |
3586 | if (c == 1) | |
3587 | { | |
3588 | c = saved_doc_string[from++]; | |
3589 | if (c == 1) | |
3590 | saved_doc_string[to++] = c; | |
3591 | else if (c == '0') | |
3592 | saved_doc_string[to++] = 0; | |
3593 | else if (c == '_') | |
3594 | saved_doc_string[to++] = 037; | |
3595 | } | |
3596 | else | |
3597 | saved_doc_string[to++] = c; | |
3598 | } | |
3599 | ||
8792be66 KH |
3600 | return make_unibyte_string (saved_doc_string + start, |
3601 | to - start); | |
b2a30870 | 3602 | } |
c15cfd1f RS |
3603 | /* Look in prev_saved_doc_string the same way. */ |
3604 | else if (pos >= prev_saved_doc_string_position | |
3605 | && pos < (prev_saved_doc_string_position | |
3606 | + prev_saved_doc_string_length)) | |
3607 | { | |
82cb60d3 PE |
3608 | ptrdiff_t start = |
3609 | pos - prev_saved_doc_string_position; | |
3610 | ptrdiff_t from, to; | |
c15cfd1f RS |
3611 | |
3612 | /* Process quoting with ^A, | |
3613 | and find the end of the string, | |
3614 | which is marked with ^_ (037). */ | |
3615 | for (from = start, to = start; | |
3616 | prev_saved_doc_string[from] != 037;) | |
3617 | { | |
3618 | int c = prev_saved_doc_string[from++]; | |
3619 | if (c == 1) | |
3620 | { | |
3621 | c = prev_saved_doc_string[from++]; | |
3622 | if (c == 1) | |
3623 | prev_saved_doc_string[to++] = c; | |
3624 | else if (c == '0') | |
3625 | prev_saved_doc_string[to++] = 0; | |
3626 | else if (c == '_') | |
3627 | prev_saved_doc_string[to++] = 037; | |
3628 | } | |
3629 | else | |
3630 | prev_saved_doc_string[to++] = c; | |
3631 | } | |
3632 | ||
8792be66 KH |
3633 | return make_unibyte_string (prev_saved_doc_string |
3634 | + start, | |
3635 | to - start); | |
c15cfd1f | 3636 | } |
b2a30870 | 3637 | else |
8792be66 | 3638 | return get_doc_string (val, 1, 0); |
b2a30870 RS |
3639 | } |
3640 | ||
821d417e RS |
3641 | return val; |
3642 | } | |
e4d29b33 | 3643 | invalid_syntax (". in wrong context"); |
078e7b4a | 3644 | } |
e4d29b33 | 3645 | invalid_syntax ("] in a list"); |
078e7b4a | 3646 | } |
48def666 | 3647 | tem = Fcons (elt, Qnil); |
265a9e55 | 3648 | if (!NILP (tail)) |
f5df591a | 3649 | XSETCDR (tail, tem); |
078e7b4a JB |
3650 | else |
3651 | val = tem; | |
3652 | tail = tem; | |
078e7b4a JB |
3653 | } |
3654 | } | |
3655 | \f | |
1e3890d1 | 3656 | static Lisp_Object initial_obarray; |
078e7b4a | 3657 | |
48def666 | 3658 | /* `oblookup' stores the bucket number here, for the sake of Funintern. */ |
d007f5c8 | 3659 | |
2f30ecd0 | 3660 | static size_t oblookup_last_bucket_number; |
d007f5c8 | 3661 | |
d007f5c8 RS |
3662 | /* Get an error if OBARRAY is not an obarray. |
3663 | If it is one, return it. */ | |
3664 | ||
078e7b4a | 3665 | Lisp_Object |
971de7fb | 3666 | check_obarray (Lisp_Object obarray) |
078e7b4a | 3667 | { |
77b37c05 | 3668 | if (!VECTORP (obarray) || ASIZE (obarray) == 0) |
078e7b4a JB |
3669 | { |
3670 | /* If Vobarray is now invalid, force it to be valid. */ | |
3671 | if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
8878319c | 3672 | wrong_type_argument (Qvectorp, obarray); |
078e7b4a JB |
3673 | } |
3674 | return obarray; | |
3675 | } | |
3676 | ||
d007f5c8 RS |
3677 | /* Intern the C string STR: return a symbol with that name, |
3678 | interned in the current obarray. */ | |
078e7b4a JB |
3679 | |
3680 | Lisp_Object | |
e8df9267 | 3681 | intern_1 (const char *str, ptrdiff_t len) |
078e7b4a | 3682 | { |
e8df9267 DA |
3683 | Lisp_Object obarray = check_obarray (Vobarray); |
3684 | Lisp_Object tem = oblookup (obarray, str, len, len); | |
078e7b4a | 3685 | |
e8df9267 | 3686 | return SYMBOLP (tem) ? tem : Fintern (make_string (str, len), obarray); |
078e7b4a | 3687 | } |
4ad679f9 | 3688 | |
5e2327cf | 3689 | Lisp_Object |
e8df9267 | 3690 | intern_c_string_1 (const char *str, ptrdiff_t len) |
5e2327cf | 3691 | { |
e8df9267 DA |
3692 | Lisp_Object obarray = check_obarray (Vobarray); |
3693 | Lisp_Object tem = oblookup (obarray, str, len, len); | |
5e2327cf | 3694 | |
5e2327cf DN |
3695 | if (SYMBOLP (tem)) |
3696 | return tem; | |
3697 | ||
3698 | if (NILP (Vpurify_flag)) | |
3699 | /* Creating a non-pure string from a string literal not | |
3700 | implemented yet. We could just use make_string here and live | |
3701 | with the extra copy. */ | |
1088b922 | 3702 | emacs_abort (); |
5e2327cf | 3703 | |
2a0213a6 | 3704 | return Fintern (make_pure_c_string (str, len), obarray); |
5e2327cf | 3705 | } |
d007f5c8 | 3706 | \f |
a7ca3326 | 3707 | DEFUN ("intern", Fintern, Sintern, 1, 2, 0, |
5de38842 PJ |
3708 | doc: /* Return the canonical symbol whose name is STRING. |
3709 | If there is none, one is created by this function and returned. | |
3710 | A second optional argument specifies the obarray to use; | |
3711 | it defaults to the value of `obarray'. */) | |
5842a27b | 3712 | (Lisp_Object string, Lisp_Object obarray) |
078e7b4a JB |
3713 | { |
3714 | register Lisp_Object tem, sym, *ptr; | |
3715 | ||
265a9e55 | 3716 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3717 | obarray = check_obarray (obarray); |
3718 | ||
b7826503 | 3719 | CHECK_STRING (string); |
078e7b4a | 3720 | |
42a5b22f | 3721 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3722 | SCHARS (string), |
3723 | SBYTES (string)); | |
cfff016d | 3724 | if (!INTEGERP (tem)) |
078e7b4a JB |
3725 | return tem; |
3726 | ||
265a9e55 | 3727 | if (!NILP (Vpurify_flag)) |
9391b698 EN |
3728 | string = Fpurecopy (string); |
3729 | sym = Fmake_symbol (string); | |
44c6c019 GM |
3730 | |
3731 | if (EQ (obarray, initial_obarray)) | |
3732 | XSYMBOL (sym)->interned = SYMBOL_INTERNED_IN_INITIAL_OBARRAY; | |
3733 | else | |
3734 | XSYMBOL (sym)->interned = SYMBOL_INTERNED; | |
078e7b4a | 3735 | |
d5db4077 | 3736 | if ((SREF (string, 0) == ':') |
a458d45d | 3737 | && EQ (obarray, initial_obarray)) |
44c6c019 GM |
3738 | { |
3739 | XSYMBOL (sym)->constant = 1; | |
ce5b453a SM |
3740 | XSYMBOL (sym)->redirect = SYMBOL_PLAINVAL; |
3741 | SET_SYMBOL_VAL (XSYMBOL (sym), sym); | |
44c6c019 | 3742 | } |
a0549832 | 3743 | |
4939150c | 3744 | ptr = aref_addr (obarray, XINT(tem)); |
cfff016d | 3745 | if (SYMBOLP (*ptr)) |
c644523b | 3746 | set_symbol_next (sym, XSYMBOL (*ptr)); |
078e7b4a | 3747 | else |
c644523b | 3748 | set_symbol_next (sym, NULL); |
078e7b4a JB |
3749 | *ptr = sym; |
3750 | return sym; | |
3751 | } | |
3752 | ||
a7ca3326 | 3753 | DEFUN ("intern-soft", Fintern_soft, Sintern_soft, 1, 2, 0, |
5de38842 PJ |
3754 | doc: /* Return the canonical symbol named NAME, or nil if none exists. |
3755 | NAME may be a string or a symbol. If it is a symbol, that exact | |
3756 | symbol is searched for. | |
3757 | A second optional argument specifies the obarray to use; | |
3758 | it defaults to the value of `obarray'. */) | |
5842a27b | 3759 | (Lisp_Object name, Lisp_Object obarray) |
078e7b4a | 3760 | { |
c2d47f4b | 3761 | register Lisp_Object tem, string; |
078e7b4a | 3762 | |
265a9e55 | 3763 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3764 | obarray = check_obarray (obarray); |
3765 | ||
b55048d4 GM |
3766 | if (!SYMBOLP (name)) |
3767 | { | |
b7826503 | 3768 | CHECK_STRING (name); |
c2d47f4b | 3769 | string = name; |
b55048d4 GM |
3770 | } |
3771 | else | |
c2d47f4b | 3772 | string = SYMBOL_NAME (name); |
078e7b4a | 3773 | |
42a5b22f | 3774 | tem = oblookup (obarray, SSDATA (string), SCHARS (string), SBYTES (string)); |
b55048d4 GM |
3775 | if (INTEGERP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
3776 | return Qnil; | |
3777 | else | |
078e7b4a | 3778 | return tem; |
078e7b4a | 3779 | } |
d007f5c8 | 3780 | \f |
a7ca3326 | 3781 | DEFUN ("unintern", Funintern, Sunintern, 1, 2, 0, |
5de38842 PJ |
3782 | doc: /* Delete the symbol named NAME, if any, from OBARRAY. |
3783 | The value is t if a symbol was found and deleted, nil otherwise. | |
3784 | NAME may be a string or a symbol. If it is a symbol, that symbol | |
3785 | is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
3786 | OBARRAY defaults to the value of the variable `obarray'. */) | |
5842a27b | 3787 | (Lisp_Object name, Lisp_Object obarray) |
d007f5c8 RS |
3788 | { |
3789 | register Lisp_Object string, tem; | |
2f30ecd0 | 3790 | size_t hash; |
d007f5c8 RS |
3791 | |
3792 | if (NILP (obarray)) obarray = Vobarray; | |
3793 | obarray = check_obarray (obarray); | |
3794 | ||
3795 | if (SYMBOLP (name)) | |
d4c83cae | 3796 | string = SYMBOL_NAME (name); |
d007f5c8 RS |
3797 | else |
3798 | { | |
b7826503 | 3799 | CHECK_STRING (name); |
d007f5c8 RS |
3800 | string = name; |
3801 | } | |
3802 | ||
42a5b22f | 3803 | tem = oblookup (obarray, SSDATA (string), |
d5db4077 KR |
3804 | SCHARS (string), |
3805 | SBYTES (string)); | |
d007f5c8 RS |
3806 | if (INTEGERP (tem)) |
3807 | return Qnil; | |
3808 | /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
3809 | if (SYMBOLP (name) && !EQ (name, tem)) | |
3810 | return Qnil; | |
3811 | ||
8ab1650e SM |
3812 | /* There are plenty of other symbols which will screw up the Emacs |
3813 | session if we unintern them, as well as even more ways to use | |
3814 | `setq' or `fset' or whatnot to make the Emacs session | |
3815 | unusable. Let's not go down this silly road. --Stef */ | |
3816 | /* if (EQ (tem, Qnil) || EQ (tem, Qt)) | |
3817 | error ("Attempt to unintern t or nil"); */ | |
82c602f0 | 3818 | |
44c6c019 | 3819 | XSYMBOL (tem)->interned = SYMBOL_UNINTERNED; |
ca69c42f | 3820 | |
d007f5c8 RS |
3821 | hash = oblookup_last_bucket_number; |
3822 | ||
28be1ada | 3823 | if (EQ (AREF (obarray, hash), tem)) |
b2a30870 RS |
3824 | { |
3825 | if (XSYMBOL (tem)->next) | |
4939150c PE |
3826 | { |
3827 | Lisp_Object sym; | |
3828 | XSETSYMBOL (sym, XSYMBOL (tem)->next); | |
3829 | ASET (obarray, hash, sym); | |
3830 | } | |
b2a30870 | 3831 | else |
4939150c | 3832 | ASET (obarray, hash, make_number (0)); |
b2a30870 | 3833 | } |
d007f5c8 RS |
3834 | else |
3835 | { | |
3836 | Lisp_Object tail, following; | |
3837 | ||
28be1ada | 3838 | for (tail = AREF (obarray, hash); |
d007f5c8 RS |
3839 | XSYMBOL (tail)->next; |
3840 | tail = following) | |
3841 | { | |
3842 | XSETSYMBOL (following, XSYMBOL (tail)->next); | |
3843 | if (EQ (following, tem)) | |
3844 | { | |
c644523b | 3845 | set_symbol_next (tail, XSYMBOL (following)->next); |
d007f5c8 RS |
3846 | break; |
3847 | } | |
3848 | } | |
3849 | } | |
3850 | ||
3851 | return Qt; | |
3852 | } | |
3853 | \f | |
3854 | /* Return the symbol in OBARRAY whose names matches the string | |
e28552a4 RS |
3855 | of SIZE characters (SIZE_BYTE bytes) at PTR. |
3856 | If there is no such symbol in OBARRAY, return nil. | |
d007f5c8 RS |
3857 | |
3858 | Also store the bucket number in oblookup_last_bucket_number. */ | |
078e7b4a JB |
3859 | |
3860 | Lisp_Object | |
d311d28c | 3861 | oblookup (Lisp_Object obarray, register const char *ptr, ptrdiff_t size, ptrdiff_t size_byte) |
078e7b4a | 3862 | { |
2f30ecd0 PE |
3863 | size_t hash; |
3864 | size_t obsize; | |
078e7b4a JB |
3865 | register Lisp_Object tail; |
3866 | Lisp_Object bucket, tem; | |
3867 | ||
2bce5643 DA |
3868 | obarray = check_obarray (obarray); |
3869 | obsize = ASIZE (obarray); | |
3870 | ||
519418b3 RS |
3871 | /* This is sometimes needed in the middle of GC. */ |
3872 | obsize &= ~ARRAY_MARK_FLAG; | |
7c2fb837 | 3873 | hash = hash_string (ptr, size_byte) % obsize; |
28be1ada | 3874 | bucket = AREF (obarray, hash); |
d007f5c8 | 3875 | oblookup_last_bucket_number = hash; |
8bc285a2 | 3876 | if (EQ (bucket, make_number (0))) |
078e7b4a | 3877 | ; |
cfff016d | 3878 | else if (!SYMBOLP (bucket)) |
48def666 | 3879 | error ("Bad data in guts of obarray"); /* Like CADR error message. */ |
d007f5c8 RS |
3880 | else |
3881 | for (tail = bucket; ; XSETSYMBOL (tail, XSYMBOL (tail)->next)) | |
078e7b4a | 3882 | { |
d5db4077 KR |
3883 | if (SBYTES (SYMBOL_NAME (tail)) == size_byte |
3884 | && SCHARS (SYMBOL_NAME (tail)) == size | |
72af86bd | 3885 | && !memcmp (SDATA (SYMBOL_NAME (tail)), ptr, size_byte)) |
078e7b4a JB |
3886 | return tail; |
3887 | else if (XSYMBOL (tail)->next == 0) | |
3888 | break; | |
3889 | } | |
1805de4f | 3890 | XSETINT (tem, hash); |
078e7b4a JB |
3891 | return tem; |
3892 | } | |
d007f5c8 | 3893 | \f |
078e7b4a | 3894 | void |
971de7fb | 3895 | map_obarray (Lisp_Object obarray, void (*fn) (Lisp_Object, Lisp_Object), Lisp_Object arg) |
078e7b4a | 3896 | { |
82cb60d3 | 3897 | ptrdiff_t i; |
078e7b4a | 3898 | register Lisp_Object tail; |
b7826503 | 3899 | CHECK_VECTOR (obarray); |
77b37c05 | 3900 | for (i = ASIZE (obarray) - 1; i >= 0; i--) |
078e7b4a | 3901 | { |
28be1ada | 3902 | tail = AREF (obarray, i); |
4f5c4403 | 3903 | if (SYMBOLP (tail)) |
078e7b4a JB |
3904 | while (1) |
3905 | { | |
3906 | (*fn) (tail, arg); | |
3907 | if (XSYMBOL (tail)->next == 0) | |
3908 | break; | |
1805de4f | 3909 | XSETSYMBOL (tail, XSYMBOL (tail)->next); |
078e7b4a JB |
3910 | } |
3911 | } | |
3912 | } | |
3913 | ||
7d383292 | 3914 | static void |
971de7fb | 3915 | mapatoms_1 (Lisp_Object sym, Lisp_Object function) |
078e7b4a JB |
3916 | { |
3917 | call1 (function, sym); | |
3918 | } | |
3919 | ||
3920 | DEFUN ("mapatoms", Fmapatoms, Smapatoms, 1, 2, 0, | |
5de38842 PJ |
3921 | doc: /* Call FUNCTION on every symbol in OBARRAY. |
3922 | OBARRAY defaults to the value of `obarray'. */) | |
5842a27b | 3923 | (Lisp_Object function, Lisp_Object obarray) |
078e7b4a | 3924 | { |
265a9e55 | 3925 | if (NILP (obarray)) obarray = Vobarray; |
078e7b4a JB |
3926 | obarray = check_obarray (obarray); |
3927 | ||
3928 | map_obarray (obarray, mapatoms_1, function); | |
3929 | return Qnil; | |
3930 | } | |
3931 | ||
5e88a39e | 3932 | #define OBARRAY_SIZE 1511 |
078e7b4a JB |
3933 | |
3934 | void | |
971de7fb | 3935 | init_obarray (void) |
078e7b4a JB |
3936 | { |
3937 | Lisp_Object oblength; | |
37d0112b | 3938 | ptrdiff_t size = 100 + MAX_MULTIBYTE_LENGTH; |
078e7b4a | 3939 | |
baf69866 | 3940 | XSETFASTINT (oblength, OBARRAY_SIZE); |
078e7b4a | 3941 | |
078e7b4a JB |
3942 | Vobarray = Fmake_vector (oblength, make_number (0)); |
3943 | initial_obarray = Vobarray; | |
3944 | staticpro (&initial_obarray); | |
078e7b4a | 3945 | |
2a0213a6 | 3946 | Qunbound = Fmake_symbol (build_pure_c_string ("unbound")); |
ce5b453a SM |
3947 | /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the |
3948 | NILP (Vpurify_flag) check in intern_c_string. */ | |
3949 | Qnil = make_number (-1); Vpurify_flag = make_number (1); | |
3950 | Qnil = intern_c_string ("nil"); | |
3951 | ||
3952 | /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil, | |
53964682 | 3953 | so those two need to be fixed manually. */ |
ce5b453a | 3954 | SET_SYMBOL_VAL (XSYMBOL (Qunbound), Qunbound); |
c644523b DA |
3955 | set_symbol_function (Qunbound, Qunbound); |
3956 | set_symbol_plist (Qunbound, Qnil); | |
ce5b453a SM |
3957 | SET_SYMBOL_VAL (XSYMBOL (Qnil), Qnil); |
3958 | XSYMBOL (Qnil)->constant = 1; | |
9660f5fc | 3959 | XSYMBOL (Qnil)->declared_special = 1; |
c644523b | 3960 | set_symbol_plist (Qnil, Qnil); |
078e7b4a | 3961 | |
d67b4f80 | 3962 | Qt = intern_c_string ("t"); |
ce5b453a | 3963 | SET_SYMBOL_VAL (XSYMBOL (Qt), Qt); |
9660f5fc | 3964 | XSYMBOL (Qnil)->declared_special = 1; |
44c6c019 | 3965 | XSYMBOL (Qt)->constant = 1; |
078e7b4a JB |
3966 | |
3967 | /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */ | |
3968 | Vpurify_flag = Qt; | |
3969 | ||
cd3520a4 | 3970 | DEFSYM (Qvariable_documentation, "variable-documentation"); |
078e7b4a | 3971 | |
23f86fce | 3972 | read_buffer = xmalloc (size); |
37d0112b | 3973 | read_buffer_size = size; |
078e7b4a JB |
3974 | } |
3975 | \f | |
3976 | void | |
971de7fb | 3977 | defsubr (struct Lisp_Subr *sname) |
078e7b4a | 3978 | { |
c644523b | 3979 | Lisp_Object sym, tem; |
d67b4f80 | 3980 | sym = intern_c_string (sname->symbol_name); |
eab3844f | 3981 | XSETTYPED_PVECTYPE (sname, size, PVEC_SUBR); |
c644523b DA |
3982 | XSETSUBR (tem, sname); |
3983 | set_symbol_function (sym, tem); | |
078e7b4a JB |
3984 | } |
3985 | ||
48def666 | 3986 | #ifdef NOTDEF /* Use fset in subr.el now! */ |
078e7b4a | 3987 | void |
1dae0f0a | 3988 | defalias (struct Lisp_Subr *sname, char *string) |
078e7b4a JB |
3989 | { |
3990 | Lisp_Object sym; | |
3991 | sym = intern (string); | |
1805de4f | 3992 | XSETSUBR (XSYMBOL (sym)->function, sname); |
078e7b4a JB |
3993 | } |
3994 | #endif /* NOTDEF */ | |
3995 | ||
039c6cc3 | 3996 | /* Define an "integer variable"; a symbol whose value is forwarded to a |
82cb60d3 | 3997 | C variable of type EMACS_INT. Sample call (with "xx" to fool make-docfile): |
039c6cc3 | 3998 | DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */ |
078e7b4a | 3999 | void |
ce5b453a SM |
4000 | defvar_int (struct Lisp_Intfwd *i_fwd, |
4001 | const char *namestring, EMACS_INT *address) | |
078e7b4a | 4002 | { |
ce5b453a | 4003 | Lisp_Object sym; |
5e2327cf | 4004 | sym = intern_c_string (namestring); |
ce5b453a SM |
4005 | i_fwd->type = Lisp_Fwd_Int; |
4006 | i_fwd->intvar = address; | |
b9598260 | 4007 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4008 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4009 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)i_fwd); | |
078e7b4a JB |
4010 | } |
4011 | ||
f0529b5b | 4012 | /* Similar but define a variable whose value is t if address contains 1, |
0f011df0 | 4013 | nil if address contains 0. */ |
078e7b4a | 4014 | void |
ce5b453a | 4015 | defvar_bool (struct Lisp_Boolfwd *b_fwd, |
f5d9e83a | 4016 | const char *namestring, bool *address) |
078e7b4a | 4017 | { |
ce5b453a | 4018 | Lisp_Object sym; |
5e2327cf | 4019 | sym = intern_c_string (namestring); |
ce5b453a SM |
4020 | b_fwd->type = Lisp_Fwd_Bool; |
4021 | b_fwd->boolvar = address; | |
b9598260 | 4022 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4023 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4024 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)b_fwd); | |
1ffcc3b1 | 4025 | Vbyte_boolean_vars = Fcons (sym, Vbyte_boolean_vars); |
078e7b4a JB |
4026 | } |
4027 | ||
1a0f90f7 KH |
4028 | /* Similar but define a variable whose value is the Lisp Object stored |
4029 | at address. Two versions: with and without gc-marking of the C | |
4030 | variable. The nopro version is used when that variable will be | |
4031 | gc-marked for some other reason, since marking the same slot twice | |
4032 | can cause trouble with strings. */ | |
078e7b4a | 4033 | void |
ce5b453a SM |
4034 | defvar_lisp_nopro (struct Lisp_Objfwd *o_fwd, |
4035 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4036 | { |
ce5b453a | 4037 | Lisp_Object sym; |
5e2327cf | 4038 | sym = intern_c_string (namestring); |
ce5b453a SM |
4039 | o_fwd->type = Lisp_Fwd_Obj; |
4040 | o_fwd->objvar = address; | |
b9598260 | 4041 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4042 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4043 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)o_fwd); | |
078e7b4a JB |
4044 | } |
4045 | ||
078e7b4a | 4046 | void |
ce5b453a SM |
4047 | defvar_lisp (struct Lisp_Objfwd *o_fwd, |
4048 | const char *namestring, Lisp_Object *address) | |
078e7b4a | 4049 | { |
ce5b453a | 4050 | defvar_lisp_nopro (o_fwd, namestring, address); |
1a0f90f7 | 4051 | staticpro (address); |
078e7b4a JB |
4052 | } |
4053 | ||
950c215d | 4054 | /* Similar but define a variable whose value is the Lisp Object stored |
4ac38690 | 4055 | at a particular offset in the current kboard object. */ |
950c215d KH |
4056 | |
4057 | void | |
ce5b453a SM |
4058 | defvar_kboard (struct Lisp_Kboard_Objfwd *ko_fwd, |
4059 | const char *namestring, int offset) | |
950c215d | 4060 | { |
ce5b453a | 4061 | Lisp_Object sym; |
5e2327cf | 4062 | sym = intern_c_string (namestring); |
ce5b453a SM |
4063 | ko_fwd->type = Lisp_Fwd_Kboard_Obj; |
4064 | ko_fwd->offset = offset; | |
b9598260 | 4065 | XSYMBOL (sym)->declared_special = 1; |
ce5b453a SM |
4066 | XSYMBOL (sym)->redirect = SYMBOL_FORWARDED; |
4067 | SET_SYMBOL_FWD (XSYMBOL (sym), (union Lisp_Fwd *)ko_fwd); | |
950c215d | 4068 | } |
078e7b4a | 4069 | \f |
929e7845 GM |
4070 | /* Check that the elements of Vload_path exist. */ |
4071 | ||
b3350bf9 | 4072 | static void |
929e7845 GM |
4073 | load_path_check (void) |
4074 | { | |
4075 | Lisp_Object path_tail; | |
4076 | ||
4077 | /* The only elements that might not exist are those from | |
4078 | PATH_LOADSEARCH, EMACSLOADPATH. Anything else is only added if | |
4079 | it exists. */ | |
4080 | for (path_tail = Vload_path; !NILP (path_tail); path_tail = XCDR (path_tail)) | |
4081 | { | |
4082 | Lisp_Object dirfile; | |
4083 | dirfile = Fcar (path_tail); | |
4084 | if (STRINGP (dirfile)) | |
4085 | { | |
4086 | dirfile = Fdirectory_file_name (dirfile); | |
4087 | if (access (SSDATA (dirfile), 0) < 0) | |
4088 | dir_warning ("Warning: Lisp directory `%s' does not exist.\n", | |
4089 | XCAR (path_tail)); | |
4090 | } | |
4091 | } | |
4092 | } | |
4093 | ||
11938f10 KH |
4094 | /* Record the value of load-path used at the start of dumping |
4095 | so we can see if the site changed it later during dumping. */ | |
4096 | static Lisp_Object dump_path; | |
4097 | ||
929e7845 GM |
4098 | /* Compute the default Vload_path, with the following logic: |
4099 | If CANNOT_DUMP: | |
4100 | use EMACSLOADPATH env-var if set; otherwise use PATH_LOADSEARCH, | |
4101 | prepending PATH_SITELOADSEARCH unless --no-site-lisp. | |
4102 | The remainder is what happens when dumping works: | |
4103 | If purify-flag (ie dumping) just use PATH_DUMPLOADSEARCH. | |
4104 | Otherwise use EMACSLOADPATH if set, else PATH_LOADSEARCH. | |
4105 | ||
4106 | If !initialized, then just set both Vload_path and dump_path. | |
4107 | If initialized, then if Vload_path != dump_path, do nothing. | |
4108 | (Presumably the load-path has already been changed by something. | |
4109 | This can only be from a site-load file during dumping, | |
4110 | or because EMACSLOADPATH is set.) | |
4111 | If Vinstallation_directory is not nil (ie, running uninstalled): | |
4112 | If installation-dir/lisp exists and not already a member, | |
4113 | we must be running uninstalled. Reset the load-path | |
4114 | to just installation-dir/lisp. (The default PATH_LOADSEARCH | |
4115 | refers to the eventual installation directories. Since we | |
4116 | are not yet installed, we should not use them, even if they exist.) | |
4117 | If installation-dir/lisp does not exist, just add dump_path at the | |
4118 | end instead. | |
4119 | Add installation-dir/leim (if exists and not already a member) at the front. | |
4120 | Add installation-dir/site-lisp (if !no_site_lisp, and exists | |
4121 | and not already a member) at the front. | |
4122 | If installation-dir != source-dir (ie running an uninstalled, | |
4123 | out-of-tree build) AND install-dir/src/Makefile exists BUT | |
4124 | install-dir/src/Makefile.in does NOT exist (this is a sanity | |
4125 | check), then repeat the above steps for source-dir/lisp, | |
4126 | leim and site-lisp. | |
4127 | Finally, add the site-lisp directories at the front (if !no_site_lisp). | |
4128 | */ | |
4129 | ||
d5b28a9d | 4130 | void |
971de7fb | 4131 | init_lread (void) |
078e7b4a | 4132 | { |
8ea90aa3 | 4133 | const char *normal; |
ca26824c | 4134 | |
46947372 | 4135 | #ifdef CANNOT_DUMP |
9e059e3f GM |
4136 | #ifdef HAVE_NS |
4137 | const char *loadpath = ns_load_path (); | |
4138 | #endif | |
4139 | ||
46947372 | 4140 | normal = PATH_LOADSEARCH; |
9e059e3f GM |
4141 | #ifdef HAVE_NS |
4142 | Vload_path = decode_env_path ("EMACSLOADPATH", loadpath ? loadpath : normal); | |
4143 | #else | |
929e7845 | 4144 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); |
9e059e3f | 4145 | #endif |
929e7845 GM |
4146 | |
4147 | load_path_check (); | |
4148 | ||
4149 | /* FIXME CANNOT_DUMP platforms should get source-dir/lisp etc added | |
4150 | to their load-path too, AFAICS. I don't think we can tell the | |
4151 | difference between initialized and !initialized in this case, | |
4152 | so we'll have to do it unconditionally when Vinstallation_directory | |
4153 | is non-nil. */ | |
4154 | if (!no_site_lisp && !egetenv ("EMACSLOADPATH")) | |
ca26824c GM |
4155 | { |
4156 | Lisp_Object sitelisp; | |
4157 | sitelisp = decode_env_path (0, PATH_SITELOADSEARCH); | |
4158 | if (! NILP (sitelisp)) Vload_path = nconc2 (sitelisp, Vload_path); | |
4159 | } | |
76151e2c | 4160 | #else /* !CANNOT_DUMP */ |
46947372 | 4161 | if (NILP (Vpurify_flag)) |
929e7845 GM |
4162 | { |
4163 | normal = PATH_LOADSEARCH; | |
4164 | /* If the EMACSLOADPATH environment variable is set, use its value. | |
4165 | This doesn't apply if we're dumping. */ | |
4166 | if (egetenv ("EMACSLOADPATH")) | |
4167 | Vload_path = decode_env_path ("EMACSLOADPATH", normal); | |
4168 | } | |
279499f0 | 4169 | else |
46947372 | 4170 | normal = PATH_DUMPLOADSEARCH; |
279499f0 | 4171 | |
9d8d07e5 GM |
4172 | /* In a dumped Emacs, we normally reset the value of Vload_path using |
4173 | PATH_LOADSEARCH, since the value that was dumped uses lisp/ in | |
4174 | the source directory, instead of the path of the installed elisp | |
4175 | libraries. However, if it appears that Vload_path has already been | |
4176 | changed from the default that was saved before dumping, don't | |
929e7845 GM |
4177 | change it further. Changes can only be due to EMACSLOADPATH, or |
4178 | site-lisp files that were processed during dumping. */ | |
4746118a JB |
4179 | if (initialized) |
4180 | { | |
929e7845 GM |
4181 | if (NILP (Fequal (dump_path, Vload_path))) |
4182 | { | |
4183 | /* Do not make any changes, just check the elements exist. */ | |
4184 | /* Note: --no-site-lisp is ignored. | |
4185 | I don't know what to do about this. */ | |
4186 | load_path_check (); | |
4187 | } | |
4188 | else | |
80667d53 | 4189 | { |
9e059e3f GM |
4190 | #ifdef HAVE_NS |
4191 | const char *loadpath = ns_load_path (); | |
4192 | Vload_path = decode_env_path (0, loadpath ? loadpath : normal); | |
4193 | #else | |
80667d53 | 4194 | Vload_path = decode_env_path (0, normal); |
9e059e3f | 4195 | #endif |
ca26824c | 4196 | if (!NILP (Vinstallation_directory)) |
80667d53 | 4197 | { |
ca26824c GM |
4198 | Lisp_Object tem, tem1; |
4199 | ||
929e7845 GM |
4200 | /* Add to the path the lisp subdir of the installation |
4201 | dir, if it exists. Note: in out-of-tree builds, | |
4202 | this directory is empty save for Makefile. */ | |
ca26824c GM |
4203 | tem = Fexpand_file_name (build_string ("lisp"), |
4204 | Vinstallation_directory); | |
4205 | tem1 = Ffile_exists_p (tem); | |
4206 | if (!NILP (tem1)) | |
4207 | { | |
4208 | if (NILP (Fmember (tem, Vload_path))) | |
4209 | { | |
929e7845 GM |
4210 | /* We are running uninstalled. The default load-path |
4211 | points to the eventual installed lisp, leim | |
4212 | directories. We should not use those now, even | |
4213 | if they exist, so start over from a clean slate. */ | |
4214 | Vload_path = Fcons (tem, Qnil); | |
ca26824c GM |
4215 | } |
4216 | } | |
4217 | else | |
4218 | /* That dir doesn't exist, so add the build-time | |
4219 | Lisp dirs instead. */ | |
4220 | Vload_path = nconc2 (Vload_path, dump_path); | |
4221 | ||
4222 | /* Add leim under the installation dir, if it exists. */ | |
4223 | tem = Fexpand_file_name (build_string ("leim"), | |
4224 | Vinstallation_directory); | |
4225 | tem1 = Ffile_exists_p (tem); | |
4226 | if (!NILP (tem1)) | |
4227 | { | |
4228 | if (NILP (Fmember (tem, Vload_path))) | |
4229 | Vload_path = Fcons (tem, Vload_path); | |
4230 | } | |
4231 | ||
4232 | /* Add site-lisp under the installation dir, if it exists. */ | |
4233 | if (!no_site_lisp) | |
4234 | { | |
4235 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
4236 | Vinstallation_directory); | |
4237 | tem1 = Ffile_exists_p (tem); | |
4238 | if (!NILP (tem1)) | |
4239 | { | |
4240 | if (NILP (Fmember (tem, Vload_path))) | |
4241 | Vload_path = Fcons (tem, Vload_path); | |
4242 | } | |
4243 | } | |
4244 | ||
4245 | /* If Emacs was not built in the source directory, | |
4246 | and it is run from where it was built, add to load-path | |
4247 | the lisp, leim and site-lisp dirs under that directory. */ | |
4248 | ||
4249 | if (NILP (Fequal (Vinstallation_directory, Vsource_directory))) | |
4250 | { | |
4251 | Lisp_Object tem2; | |
4252 | ||
4253 | tem = Fexpand_file_name (build_string ("src/Makefile"), | |
4254 | Vinstallation_directory); | |
4255 | tem1 = Ffile_exists_p (tem); | |
4256 | ||
4257 | /* Don't be fooled if they moved the entire source tree | |
4258 | AFTER dumping Emacs. If the build directory is indeed | |
4259 | different from the source dir, src/Makefile.in and | |
4260 | src/Makefile will not be found together. */ | |
4261 | tem = Fexpand_file_name (build_string ("src/Makefile.in"), | |
4262 | Vinstallation_directory); | |
4263 | tem2 = Ffile_exists_p (tem); | |
4264 | if (!NILP (tem1) && NILP (tem2)) | |
4265 | { | |
4266 | tem = Fexpand_file_name (build_string ("lisp"), | |
4267 | Vsource_directory); | |
4268 | ||
4269 | if (NILP (Fmember (tem, Vload_path))) | |
4270 | Vload_path = Fcons (tem, Vload_path); | |
4271 | ||
4272 | tem = Fexpand_file_name (build_string ("leim"), | |
4273 | Vsource_directory); | |
4274 | ||
4275 | if (NILP (Fmember (tem, Vload_path))) | |
4276 | Vload_path = Fcons (tem, Vload_path); | |
4277 | ||
4278 | if (!no_site_lisp) | |
4279 | { | |
4280 | tem = Fexpand_file_name (build_string ("site-lisp"), | |
4281 | Vsource_directory); | |
31d02438 GM |
4282 | tem1 = Ffile_exists_p (tem); |
4283 | if (!NILP (tem1)) | |
4284 | { | |
4285 | if (NILP (Fmember (tem, Vload_path))) | |
4286 | Vload_path = Fcons (tem, Vload_path); | |
4287 | } | |
ca26824c GM |
4288 | } |
4289 | } | |
4290 | } /* Vinstallation_directory != Vsource_directory */ | |
4291 | ||
4292 | } /* if Vinstallation_directory */ | |
4293 | ||
929e7845 GM |
4294 | /* Check before adding the site-lisp directories. |
4295 | The install should have created them, but they are not | |
4296 | required, so no need to warn if they are absent. | |
4297 | Or we might be running before installation. */ | |
4298 | load_path_check (); | |
4299 | ||
ca26824c | 4300 | /* Add the site-lisp directories at the front. */ |
ca26824c GM |
4301 | if (!no_site_lisp) |
4302 | { | |
4303 | Lisp_Object sitelisp; | |
4304 | sitelisp = decode_env_path (0, PATH_SITELOADSEARCH); | |
4305 | if (! NILP (sitelisp)) Vload_path = nconc2 (sitelisp, Vload_path); | |
4306 | } | |
4307 | } /* if dump_path == Vload_path */ | |
4746118a | 4308 | } |
9d8d07e5 | 4309 | else /* !initialized */ |
11938f10 | 4310 | { |
929e7845 GM |
4311 | /* NORMAL refers to PATH_DUMPLOADSEARCH, ie the lisp dir in the |
4312 | source directory. We used to add ../lisp (ie the lisp dir in | |
4313 | the build directory) at the front here, but that caused trouble | |
4314 | because it was copied from dump_path into Vload_path, above, | |
4315 | when Vinstallation_directory was non-nil. It should not be | |
4316 | necessary, since in out of tree builds lisp/ is empty, save | |
4317 | for Makefile. */ | |
7b396c6c | 4318 | Vload_path = decode_env_path (0, normal); |
11938f10 | 4319 | dump_path = Vload_path; |
929e7845 GM |
4320 | /* No point calling load_path_check; load-path only contains essential |
4321 | elements from the source directory at this point. They cannot | |
4322 | be missing unless something went extremely (and improbably) | |
4323 | wrong, in which case the build will fail in obvious ways. */ | |
11938f10 | 4324 | } |
76151e2c | 4325 | #endif /* !CANNOT_DUMP */ |
279499f0 | 4326 | |
279499f0 JB |
4327 | Vvalues = Qnil; |
4328 | ||
078e7b4a | 4329 | load_in_progress = 0; |
4e53f562 | 4330 | Vload_file_name = Qnil; |
d2c6be7f RS |
4331 | |
4332 | load_descriptor_list = Qnil; | |
8f6b0411 RS |
4333 | |
4334 | Vstandard_input = Qt; | |
f74b0705 | 4335 | Vloads_in_progress = Qnil; |
078e7b4a JB |
4336 | } |
4337 | ||
85496b8c | 4338 | /* Print a warning, using format string FORMAT, that directory DIRNAME |
88852d45 | 4339 | does not exist. Print it on stderr and put it in *Messages*. */ |
85496b8c | 4340 | |
d5b28a9d | 4341 | void |
a8fe7202 | 4342 | dir_warning (const char *format, Lisp_Object dirname) |
85496b8c | 4343 | { |
d5db4077 | 4344 | fprintf (stderr, format, SDATA (dirname)); |
0df02bf3 | 4345 | |
48def666 | 4346 | /* Don't log the warning before we've initialized!! */ |
9b69357e | 4347 | if (initialized) |
0df02bf3 | 4348 | { |
0df02bf3 | 4349 | USE_SAFE_ALLOCA; |
98c6f1e3 PE |
4350 | char *buffer = SAFE_ALLOCA (SBYTES (dirname) |
4351 | + strlen (format) - (sizeof "%s" - 1) + 1); | |
4352 | ptrdiff_t message_len = esprintf (buffer, format, SDATA (dirname)); | |
0df02bf3 PE |
4353 | message_dolog (buffer, message_len, 0, STRING_MULTIBYTE (dirname)); |
4354 | SAFE_FREE (); | |
4355 | } | |
85496b8c RS |
4356 | } |
4357 | ||
078e7b4a | 4358 | void |
971de7fb | 4359 | syms_of_lread (void) |
078e7b4a JB |
4360 | { |
4361 | defsubr (&Sread); | |
4362 | defsubr (&Sread_from_string); | |
4363 | defsubr (&Sintern); | |
4364 | defsubr (&Sintern_soft); | |
d007f5c8 | 4365 | defsubr (&Sunintern); |
971a4293 | 4366 | defsubr (&Sget_load_suffixes); |
078e7b4a | 4367 | defsubr (&Sload); |
228d4b1c | 4368 | defsubr (&Seval_buffer); |
078e7b4a JB |
4369 | defsubr (&Seval_region); |
4370 | defsubr (&Sread_char); | |
4371 | defsubr (&Sread_char_exclusive); | |
078e7b4a | 4372 | defsubr (&Sread_event); |
078e7b4a JB |
4373 | defsubr (&Sget_file_char); |
4374 | defsubr (&Smapatoms); | |
86d00812 | 4375 | defsubr (&Slocate_file_internal); |
078e7b4a | 4376 | |
29208e82 | 4377 | DEFVAR_LISP ("obarray", Vobarray, |
5de38842 PJ |
4378 | doc: /* Symbol table for use by `intern' and `read'. |
4379 | It is a vector whose length ought to be prime for best results. | |
4380 | The vector's contents don't make sense if examined from Lisp programs; | |
4381 | to find all the symbols in an obarray, use `mapatoms'. */); | |
078e7b4a | 4382 | |
29208e82 | 4383 | DEFVAR_LISP ("values", Vvalues, |
5de38842 | 4384 | doc: /* List of values of all expressions which were read, evaluated and printed. |
513749ee SM |
4385 | Order is reverse chronological. */); |
4386 | XSYMBOL (intern ("values"))->declared_special = 0; | |
078e7b4a | 4387 | |
29208e82 | 4388 | DEFVAR_LISP ("standard-input", Vstandard_input, |
5de38842 PJ |
4389 | doc: /* Stream for read to get input from. |
4390 | See documentation of `read' for possible values. */); | |
078e7b4a JB |
4391 | Vstandard_input = Qt; |
4392 | ||
29208e82 | 4393 | DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions, |
abb13b09 CW |
4394 | doc: /* If non-nil, add position of read symbols to `read-symbol-positions-list'. |
4395 | ||
4396 | If this variable is a buffer, then only forms read from that buffer | |
4397 | will be added to `read-symbol-positions-list'. | |
4398 | If this variable is t, then all read forms will be added. | |
4399 | The effect of all other values other than nil are not currently | |
4400 | defined, although they may be in the future. | |
4401 | ||
4402 | The positions are relative to the last call to `read' or | |
4403 | `read-from-string'. It is probably a bad idea to set this variable at | |
513749ee | 4404 | the toplevel; bind it instead. */); |
abb13b09 CW |
4405 | Vread_with_symbol_positions = Qnil; |
4406 | ||
29208e82 | 4407 | DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list, |
d6567030 | 4408 | doc: /* A list mapping read symbols to their positions. |
abb13b09 CW |
4409 | This variable is modified during calls to `read' or |
4410 | `read-from-string', but only when `read-with-symbol-positions' is | |
4411 | non-nil. | |
4412 | ||
4413 | Each element of the list looks like (SYMBOL . CHAR-POSITION), where | |
d6567030 | 4414 | CHAR-POSITION is an integer giving the offset of that occurrence of the |
abb13b09 CW |
4415 | symbol from the position where `read' or `read-from-string' started. |
4416 | ||
4417 | Note that a symbol will appear multiple times in this list, if it was | |
4418 | read multiple times. The list is in the same order as the symbols | |
513749ee | 4419 | were read in. */); |
177c0ea7 | 4420 | Vread_symbol_positions_list = Qnil; |
abb13b09 | 4421 | |
29208e82 | 4422 | DEFVAR_LISP ("read-circle", Vread_circle, |
91f68422 CY |
4423 | doc: /* Non-nil means read recursive structures using #N= and #N# syntax. */); |
4424 | Vread_circle = Qt; | |
4425 | ||
29208e82 | 4426 | DEFVAR_LISP ("load-path", Vload_path, |
fb7ada5f | 4427 | doc: /* List of directories to search for files to load. |
5de38842 PJ |
4428 | Each element is a string (directory name) or nil (try default directory). |
4429 | Initialized based on EMACSLOADPATH environment variable, if any, | |
4430 | otherwise to default specified by file `epaths.h' when Emacs was built. */); | |
078e7b4a | 4431 | |
29208e82 | 4432 | DEFVAR_LISP ("load-suffixes", Vload_suffixes, |
971a4293 LT |
4433 | doc: /* List of suffixes for (compiled or source) Emacs Lisp files. |
4434 | This list should not include the empty string. | |
4435 | `load' and related functions try to append these suffixes, in order, | |
4436 | to the specified file name if a Lisp suffix is allowed or required. */); | |
2a0213a6 DA |
4437 | Vload_suffixes = Fcons (build_pure_c_string (".elc"), |
4438 | Fcons (build_pure_c_string (".el"), Qnil)); | |
29208e82 | 4439 | DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes, |
971a4293 LT |
4440 | doc: /* List of suffixes that indicate representations of \ |
4441 | the same file. | |
4442 | This list should normally start with the empty string. | |
4443 | ||
4444 | Enabling Auto Compression mode appends the suffixes in | |
4445 | `jka-compr-load-suffixes' to this list and disabling Auto Compression | |
4446 | mode removes them again. `load' and related functions use this list to | |
4447 | determine whether they should look for compressed versions of a file | |
4448 | and, if so, which suffixes they should try to append to the file name | |
4449 | in order to do so. However, if you want to customize which suffixes | |
4450 | the loading functions recognize as compression suffixes, you should | |
4451 | customize `jka-compr-load-suffixes' rather than the present variable. */); | |
a74d1c97 | 4452 | Vload_file_rep_suffixes = Fcons (empty_unibyte_string, Qnil); |
e61b9b87 | 4453 | |
29208e82 | 4454 | DEFVAR_BOOL ("load-in-progress", load_in_progress, |
e0f24100 | 4455 | doc: /* Non-nil if inside of `load'. */); |
cd3520a4 | 4456 | DEFSYM (Qload_in_progress, "load-in-progress"); |
078e7b4a | 4457 | |
29208e82 | 4458 | DEFVAR_LISP ("after-load-alist", Vafter_load_alist, |
5de38842 | 4459 | doc: /* An alist of expressions to be evalled when particular files are loaded. |
6bb6da3e AM |
4460 | Each element looks like (REGEXP-OR-FEATURE FORMS...). |
4461 | ||
4462 | REGEXP-OR-FEATURE is either a regular expression to match file names, or | |
4463 | a symbol \(a feature name). | |
4464 | ||
4465 | When `load' is run and the file-name argument matches an element's | |
4466 | REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol | |
4467 | REGEXP-OR-FEATURE, the FORMS in the element are executed. | |
4468 | ||
4469 | An error in FORMS does not undo the load, but does prevent execution of | |
4470 | the rest of the FORMS. */); | |
078e7b4a JB |
4471 | Vafter_load_alist = Qnil; |
4472 | ||
29208e82 | 4473 | DEFVAR_LISP ("load-history", Vload_history, |
4801c5fa CY |
4474 | doc: /* Alist mapping loaded file names to symbols and features. |
4475 | Each alist element should be a list (FILE-NAME ENTRIES...), where | |
4476 | FILE-NAME is the name of a file that has been loaded into Emacs. | |
4477 | The file name is absolute and true (i.e. it doesn't contain symlinks). | |
4478 | As an exception, one of the alist elements may have FILE-NAME nil, | |
4479 | for symbols and features not associated with any file. | |
4480 | ||
4481 | The remaining ENTRIES in the alist element describe the functions and | |
4482 | variables defined in that file, the features provided, and the | |
4483 | features required. Each entry has the form `(provide . FEATURE)', | |
4484 | `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)', | |
69bb1ef7 LMI |
4485 | `(defface . SYMBOL)', or `(t . SYMBOL)'. Entries like `(t . SYMBOL)' |
4486 | may precede a `(defun . FUNCTION)' entry, and means that SYMBOL was an | |
4487 | autoload before this file redefined it as a function. In addition, | |
4488 | entries may also be single symbols, which means that SYMBOL was | |
4489 | defined by `defvar' or `defconst'. | |
0fc213e9 | 4490 | |
b502a9a1 RS |
4491 | During preloading, the file name recorded is relative to the main Lisp |
4492 | directory. These file names are converted to absolute at startup. */); | |
ae321d28 RS |
4493 | Vload_history = Qnil; |
4494 | ||
29208e82 | 4495 | DEFVAR_LISP ("load-file-name", Vload_file_name, |
5de38842 | 4496 | doc: /* Full name of file being loaded by `load'. */); |
20ea2964 RS |
4497 | Vload_file_name = Qnil; |
4498 | ||
29208e82 | 4499 | DEFVAR_LISP ("user-init-file", Vuser_init_file, |
5de38842 | 4500 | doc: /* File name, including directory, of user's initialization file. |
0a25a201 RS |
4501 | If the file loaded had extension `.elc', and the corresponding source file |
4502 | exists, this variable contains the name of source file, suitable for use | |
099de390 JB |
4503 | by functions like `custom-save-all' which edit the init file. |
4504 | While Emacs loads and evaluates the init file, value is the real name | |
4505 | of the file, regardless of whether or not it has the `.elc' extension. */); | |
4116ab9f KH |
4506 | Vuser_init_file = Qnil; |
4507 | ||
29208e82 | 4508 | DEFVAR_LISP ("current-load-list", Vcurrent_load_list, |
5de38842 | 4509 | doc: /* Used for internal purposes by `load'. */); |
ae321d28 RS |
4510 | Vcurrent_load_list = Qnil; |
4511 | ||
29208e82 | 4512 | DEFVAR_LISP ("load-read-function", Vload_read_function, |
5de38842 PJ |
4513 | doc: /* Function used by `load' and `eval-region' for reading expressions. |
4514 | The default is nil, which means use the function `read'. */); | |
84a15045 RS |
4515 | Vload_read_function = Qnil; |
4516 | ||
29208e82 | 4517 | DEFVAR_LISP ("load-source-file-function", Vload_source_file_function, |
9b33a603 | 4518 | doc: /* Function called in `load' for loading an Emacs Lisp source file. |
5de38842 PJ |
4519 | This function is for doing code conversion before reading the source file. |
4520 | If nil, loading is done without any code conversion. | |
4521 | Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where | |
4522 | FULLNAME is the full name of FILE. | |
4523 | See `load' for the meaning of the remaining arguments. */); | |
fe0e03f3 KH |
4524 | Vload_source_file_function = Qnil; |
4525 | ||
29208e82 | 4526 | DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings, |
5de38842 PJ |
4527 | doc: /* Non-nil means `load' should force-load all dynamic doc strings. |
4528 | This is useful when the file being loaded is a temporary copy. */); | |
b2a30870 RS |
4529 | load_force_doc_strings = 0; |
4530 | ||
29208e82 | 4531 | DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte, |
5de38842 PJ |
4532 | doc: /* Non-nil means `read' converts strings to unibyte whenever possible. |
4533 | This is normally bound by `load' and `eval-buffer' to control `read', | |
4534 | and is not meant for users to change. */); | |
94e554db RS |
4535 | load_convert_to_unibyte = 0; |
4536 | ||
29208e82 | 4537 | DEFVAR_LISP ("source-directory", Vsource_directory, |
5de38842 PJ |
4538 | doc: /* Directory in which Emacs sources were found when Emacs was built. |
4539 | You cannot count on them to still be there! */); | |
a90ba1e2 KH |
4540 | Vsource_directory |
4541 | = Fexpand_file_name (build_string ("../"), | |
4542 | Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH))); | |
4543 | ||
29208e82 | 4544 | DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list, |
5de38842 | 4545 | doc: /* List of files that were preloaded (when dumping Emacs). */); |
4b104c41 RS |
4546 | Vpreloaded_file_list = Qnil; |
4547 | ||
29208e82 | 4548 | DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars, |
5de38842 | 4549 | doc: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */); |
1ffcc3b1 DL |
4550 | Vbyte_boolean_vars = Qnil; |
4551 | ||
29208e82 | 4552 | DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries, |
5de38842 PJ |
4553 | doc: /* Non-nil means load dangerous compiled Lisp files. |
4554 | Some versions of XEmacs use different byte codes than Emacs. These | |
4555 | incompatible byte codes can make Emacs crash when it tries to execute | |
4556 | them. */); | |
da84f340 GM |
4557 | load_dangerous_libraries = 0; |
4558 | ||
29208e82 | 4559 | DEFVAR_BOOL ("force-load-messages", force_load_messages, |
beb0b7f9 EZ |
4560 | doc: /* Non-nil means force printing messages when loading Lisp files. |
4561 | This overrides the value of the NOMESSAGE argument to `load'. */); | |
4562 | force_load_messages = 0; | |
4563 | ||
29208e82 | 4564 | DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp, |
5de38842 PJ |
4565 | doc: /* Regular expression matching safe to load compiled Lisp files. |
4566 | When Emacs loads a compiled Lisp file, it reads the first 512 bytes | |
4567 | from the file, and matches them against this regular expression. | |
4568 | When the regular expression matches, the file is considered to be safe | |
4569 | to load. See also `load-dangerous-libraries'. */); | |
bb970e67 | 4570 | Vbytecomp_version_regexp |
2a0213a6 | 4571 | = build_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)"); |
da84f340 | 4572 | |
14ae4239 | 4573 | DEFSYM (Qlexical_binding, "lexical-binding"); |
8f1d2ef6 | 4574 | DEFVAR_LISP ("lexical-binding", Vlexical_binding, |
f41628b2 LMI |
4575 | doc: /* Whether to use lexical binding when evaluating code. |
4576 | Non-nil means that the code in the current buffer should be evaluated | |
4577 | with lexical binding. | |
1d698799 | 4578 | This variable is automatically set from the file variables of an |
48da7392 GM |
4579 | interpreted Lisp file read using `load'. Unlike other file local |
4580 | variables, this must be set in the first line of a file. */); | |
14ae4239 | 4581 | Vlexical_binding = Qnil; |
b9598260 SM |
4582 | Fmake_variable_buffer_local (Qlexical_binding); |
4583 | ||
29208e82 | 4584 | DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list, |
3f39f996 RS |
4585 | doc: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */); |
4586 | Veval_buffer_list = Qnil; | |
4587 | ||
29208e82 | 4588 | DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes, |
5aa273b0 SM |
4589 | doc: /* Set to non-nil when `read' encounters an old-style backquote. */); |
4590 | Vold_style_backquotes = Qnil; | |
cd3520a4 | 4591 | DEFSYM (Qold_style_backquotes, "old-style-backquotes"); |
5aa273b0 | 4592 | |
a90ba1e2 KH |
4593 | /* Vsource_directory was initialized in init_lread. */ |
4594 | ||
d2c6be7f RS |
4595 | load_descriptor_list = Qnil; |
4596 | staticpro (&load_descriptor_list); | |
4597 | ||
cd3520a4 JB |
4598 | DEFSYM (Qcurrent_load_list, "current-load-list"); |
4599 | DEFSYM (Qstandard_input, "standard-input"); | |
4600 | DEFSYM (Qread_char, "read-char"); | |
4601 | DEFSYM (Qget_file_char, "get-file-char"); | |
4602 | DEFSYM (Qget_emacs_mule_file_char, "get-emacs-mule-file-char"); | |
4603 | DEFSYM (Qload_force_doc_strings, "load-force-doc-strings"); | |
4604 | ||
4605 | DEFSYM (Qbackquote, "`"); | |
4606 | DEFSYM (Qcomma, ","); | |
4607 | DEFSYM (Qcomma_at, ",@"); | |
4608 | DEFSYM (Qcomma_dot, ",."); | |
4609 | ||
4610 | DEFSYM (Qinhibit_file_name_operation, "inhibit-file-name-operation"); | |
4611 | DEFSYM (Qascii_character, "ascii-character"); | |
4612 | DEFSYM (Qfunction, "function"); | |
4613 | DEFSYM (Qload, "load"); | |
4614 | DEFSYM (Qload_file_name, "load-file-name"); | |
4615 | DEFSYM (Qeval_buffer_list, "eval-buffer-list"); | |
4616 | DEFSYM (Qfile_truename, "file-truename"); | |
4617 | DEFSYM (Qdir_ok, "dir-ok"); | |
4618 | DEFSYM (Qdo_after_load_evaluation, "do-after-load-evaluation"); | |
6bb6da3e | 4619 | |
11938f10 | 4620 | staticpro (&dump_path); |
4ad679f9 EN |
4621 | |
4622 | staticpro (&read_objects); | |
4623 | read_objects = Qnil; | |
9e062b6c | 4624 | staticpro (&seen_list); |
f153db13 | 4625 | seen_list = Qnil; |
177c0ea7 | 4626 | |
7ee3bd7b GM |
4627 | Vloads_in_progress = Qnil; |
4628 | staticpro (&Vloads_in_progress); | |
f19a0f5b | 4629 | |
cd3520a4 JB |
4630 | DEFSYM (Qhash_table, "hash-table"); |
4631 | DEFSYM (Qdata, "data"); | |
4632 | DEFSYM (Qtest, "test"); | |
4633 | DEFSYM (Qsize, "size"); | |
4634 | DEFSYM (Qweakness, "weakness"); | |
4635 | DEFSYM (Qrehash_size, "rehash-size"); | |
4636 | DEFSYM (Qrehash_threshold, "rehash-threshold"); | |
078e7b4a | 4637 | } |