1 /* Lisp parsing and input streams.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
23 #include <sys/types.h>
27 #include <limits.h> /* for CHAR_BIT */
30 #include "intervals.h"
32 #include "character.h"
39 #include "termhooks.h"
41 #include "blockinput.h"
52 #endif /* HAVE_SETLOCALE */
57 #define file_offset off_t
58 #define file_tell ftello
60 #define file_offset long
61 #define file_tell ftell
64 /* hash table read constants */
65 static Lisp_Object Qhash_table
, Qdata
;
66 static Lisp_Object Qtest
, Qsize
;
67 static Lisp_Object Qweakness
;
68 static Lisp_Object Qrehash_size
;
69 static Lisp_Object Qrehash_threshold
;
71 static Lisp_Object Qread_char
, Qget_file_char
, Qcurrent_load_list
;
72 Lisp_Object Qstandard_input
;
73 Lisp_Object Qvariable_documentation
;
74 static Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
75 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
76 static Lisp_Object Qinhibit_file_name_operation
;
77 static Lisp_Object Qeval_buffer_list
;
78 static Lisp_Object Qlexical_binding
;
79 static Lisp_Object Qfile_truename
, Qdo_after_load_evaluation
; /* ACM 2006/5/16 */
81 /* Used instead of Qget_file_char while loading *.elc files compiled
82 by Emacs 21 or older. */
83 static Lisp_Object Qget_emacs_mule_file_char
;
85 static Lisp_Object Qload_force_doc_strings
;
87 extern Lisp_Object Qinternal_interpreter_environment
;
89 static Lisp_Object Qload_in_progress
;
91 /* The association list of objects read with the #n=object form.
92 Each member of the list has the form (n . object), and is used to
93 look up the object for the corresponding #n# construct.
94 It must be set to nil before all top-level calls to read0. */
95 static Lisp_Object read_objects
;
97 /* Nonzero means READCHAR should read bytes one by one (not character)
98 when READCHARFUN is Qget_file_char or Qget_emacs_mule_file_char.
99 This is set to 1 by read1 temporarily while handling #@NUMBER. */
100 static int load_each_byte
;
102 /* List of descriptors now open for Fload. */
103 static Lisp_Object load_descriptor_list
;
105 /* File for get_file_char to read from. Use by load. */
106 static FILE *instream
;
108 /* When nonzero, read conses in pure space */
109 static int read_pure
;
111 /* For use within read-from-string (this reader is non-reentrant!!) */
112 static EMACS_INT read_from_string_index
;
113 static EMACS_INT read_from_string_index_byte
;
114 static EMACS_INT read_from_string_limit
;
116 /* Number of characters read in the current call to Fread or
117 Fread_from_string. */
118 static EMACS_INT readchar_count
;
120 /* This contains the last string skipped with #@. */
121 static char *saved_doc_string
;
122 /* Length of buffer allocated in saved_doc_string. */
123 static ptrdiff_t saved_doc_string_size
;
124 /* Length of actual data in saved_doc_string. */
125 static ptrdiff_t saved_doc_string_length
;
126 /* This is the file position that string came from. */
127 static file_offset saved_doc_string_position
;
129 /* This contains the previous string skipped with #@.
130 We copy it from saved_doc_string when a new string
131 is put in saved_doc_string. */
132 static char *prev_saved_doc_string
;
133 /* Length of buffer allocated in prev_saved_doc_string. */
134 static ptrdiff_t prev_saved_doc_string_size
;
135 /* Length of actual data in prev_saved_doc_string. */
136 static ptrdiff_t prev_saved_doc_string_length
;
137 /* This is the file position that string came from. */
138 static file_offset prev_saved_doc_string_position
;
140 /* Nonzero means inside a new-style backquote
141 with no surrounding parentheses.
142 Fread initializes this to zero, so we need not specbind it
143 or worry about what happens to it when there is an error. */
144 static int new_backquote_flag
;
145 static Lisp_Object Qold_style_backquotes
;
147 /* A list of file names for files being loaded in Fload. Used to
148 check for recursive loads. */
150 static Lisp_Object Vloads_in_progress
;
152 static int read_emacs_mule_char (int, int (*) (int, Lisp_Object
),
155 static void readevalloop (Lisp_Object
, FILE*, Lisp_Object
, int,
156 Lisp_Object
, Lisp_Object
,
157 Lisp_Object
, Lisp_Object
);
158 static Lisp_Object
load_unwind (Lisp_Object
);
159 static Lisp_Object
load_descriptor_unwind (Lisp_Object
);
161 static void invalid_syntax (const char *) NO_RETURN
;
162 static void end_of_file_error (void) NO_RETURN
;
165 /* Functions that read one byte from the current source READCHARFUN
166 or unreads one byte. If the integer argument C is -1, it returns
167 one read byte, or -1 when there's no more byte in the source. If C
168 is 0 or positive, it unreads C, and the return value is not
171 static int readbyte_for_lambda (int, Lisp_Object
);
172 static int readbyte_from_file (int, Lisp_Object
);
173 static int readbyte_from_string (int, Lisp_Object
);
175 /* Handle unreading and rereading of characters.
176 Write READCHAR to read a character,
177 UNREAD(c) to unread c to be read again.
179 These macros correctly read/unread multibyte characters. */
181 #define READCHAR readchar (readcharfun, NULL)
182 #define UNREAD(c) unreadchar (readcharfun, c)
184 /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */
185 #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte)
187 /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char,
188 Qlambda, or a cons, we use this to keep an unread character because
189 a file stream can't handle multibyte-char unreading. The value -1
190 means that there's no unread character. */
191 static int unread_char
;
194 readchar (Lisp_Object readcharfun
, int *multibyte
)
198 int (*readbyte
) (int, Lisp_Object
);
199 unsigned char buf
[MAX_MULTIBYTE_LENGTH
];
201 int emacs_mule_encoding
= 0;
208 if (BUFFERP (readcharfun
))
210 register struct buffer
*inbuffer
= XBUFFER (readcharfun
);
212 EMACS_INT pt_byte
= BUF_PT_BYTE (inbuffer
);
214 if (pt_byte
>= BUF_ZV_BYTE (inbuffer
))
217 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
219 /* Fetch the character code from the buffer. */
220 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, pt_byte
);
221 BUF_INC_POS (inbuffer
, pt_byte
);
228 c
= BUF_FETCH_BYTE (inbuffer
, pt_byte
);
229 if (! ASCII_BYTE_P (c
))
230 c
= BYTE8_TO_CHAR (c
);
233 SET_BUF_PT_BOTH (inbuffer
, BUF_PT (inbuffer
) + 1, pt_byte
);
237 if (MARKERP (readcharfun
))
239 register struct buffer
*inbuffer
= XMARKER (readcharfun
)->buffer
;
241 EMACS_INT bytepos
= marker_byte_position (readcharfun
);
243 if (bytepos
>= BUF_ZV_BYTE (inbuffer
))
246 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
248 /* Fetch the character code from the buffer. */
249 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, bytepos
);
250 BUF_INC_POS (inbuffer
, bytepos
);
257 c
= BUF_FETCH_BYTE (inbuffer
, bytepos
);
258 if (! ASCII_BYTE_P (c
))
259 c
= BYTE8_TO_CHAR (c
);
263 XMARKER (readcharfun
)->bytepos
= bytepos
;
264 XMARKER (readcharfun
)->charpos
++;
269 if (EQ (readcharfun
, Qlambda
))
271 readbyte
= readbyte_for_lambda
;
275 if (EQ (readcharfun
, Qget_file_char
))
277 readbyte
= readbyte_from_file
;
281 if (STRINGP (readcharfun
))
283 if (read_from_string_index
>= read_from_string_limit
)
285 else if (STRING_MULTIBYTE (readcharfun
))
289 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c
, readcharfun
,
290 read_from_string_index
,
291 read_from_string_index_byte
);
295 c
= SREF (readcharfun
, read_from_string_index_byte
);
296 read_from_string_index
++;
297 read_from_string_index_byte
++;
302 if (CONSP (readcharfun
))
304 /* This is the case that read_vector is reading from a unibyte
305 string that contains a byte sequence previously skipped
306 because of #@NUMBER. The car part of readcharfun is that
307 string, and the cdr part is a value of readcharfun given to
309 readbyte
= readbyte_from_string
;
310 if (EQ (XCDR (readcharfun
), Qget_emacs_mule_file_char
))
311 emacs_mule_encoding
= 1;
315 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
317 readbyte
= readbyte_from_file
;
318 emacs_mule_encoding
= 1;
322 tem
= call0 (readcharfun
);
329 if (unread_char
>= 0)
335 c
= (*readbyte
) (-1, readcharfun
);
336 if (c
< 0 || load_each_byte
)
340 if (ASCII_BYTE_P (c
))
342 if (emacs_mule_encoding
)
343 return read_emacs_mule_char (c
, readbyte
, readcharfun
);
346 len
= BYTES_BY_CHAR_HEAD (c
);
349 c
= (*readbyte
) (-1, readcharfun
);
350 if (c
< 0 || ! TRAILING_CODE_P (c
))
353 (*readbyte
) (buf
[i
], readcharfun
);
354 return BYTE8_TO_CHAR (buf
[0]);
358 return STRING_CHAR (buf
);
361 /* Unread the character C in the way appropriate for the stream READCHARFUN.
362 If the stream is a user function, call it with the char as argument. */
365 unreadchar (Lisp_Object readcharfun
, int c
)
369 /* Don't back up the pointer if we're unreading the end-of-input mark,
370 since readchar didn't advance it when we read it. */
372 else if (BUFFERP (readcharfun
))
374 struct buffer
*b
= XBUFFER (readcharfun
);
375 EMACS_INT charpos
= BUF_PT (b
);
376 EMACS_INT bytepos
= BUF_PT_BYTE (b
);
378 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
379 BUF_DEC_POS (b
, bytepos
);
383 SET_BUF_PT_BOTH (b
, charpos
- 1, bytepos
);
385 else if (MARKERP (readcharfun
))
387 struct buffer
*b
= XMARKER (readcharfun
)->buffer
;
388 EMACS_INT bytepos
= XMARKER (readcharfun
)->bytepos
;
390 XMARKER (readcharfun
)->charpos
--;
391 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
392 BUF_DEC_POS (b
, bytepos
);
396 XMARKER (readcharfun
)->bytepos
= bytepos
;
398 else if (STRINGP (readcharfun
))
400 read_from_string_index
--;
401 read_from_string_index_byte
402 = string_char_to_byte (readcharfun
, read_from_string_index
);
404 else if (CONSP (readcharfun
))
408 else if (EQ (readcharfun
, Qlambda
))
412 else if (EQ (readcharfun
, Qget_file_char
)
413 || EQ (readcharfun
, Qget_emacs_mule_file_char
))
418 ungetc (c
, instream
);
425 call1 (readcharfun
, make_number (c
));
429 readbyte_for_lambda (int c
, Lisp_Object readcharfun
)
431 return read_bytecode_char (c
>= 0);
436 readbyte_from_file (int c
, Lisp_Object readcharfun
)
441 ungetc (c
, instream
);
450 /* Interrupted reads have been observed while reading over the network */
451 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
463 return (c
== EOF
? -1 : c
);
467 readbyte_from_string (int c
, Lisp_Object readcharfun
)
469 Lisp_Object string
= XCAR (readcharfun
);
473 read_from_string_index
--;
474 read_from_string_index_byte
475 = string_char_to_byte (string
, read_from_string_index
);
478 if (read_from_string_index
>= read_from_string_limit
)
481 FETCH_STRING_CHAR_ADVANCE (c
, string
,
482 read_from_string_index
,
483 read_from_string_index_byte
);
488 /* Read one non-ASCII character from INSTREAM. The character is
489 encoded in `emacs-mule' and the first byte is already read in
493 read_emacs_mule_char (int c
, int (*readbyte
) (int, Lisp_Object
), Lisp_Object readcharfun
)
495 /* Emacs-mule coding uses at most 4-byte for one character. */
496 unsigned char buf
[4];
497 int len
= emacs_mule_bytes
[c
];
498 struct charset
*charset
;
503 /* C is not a valid leading-code of `emacs-mule'. */
504 return BYTE8_TO_CHAR (c
);
510 c
= (*readbyte
) (-1, readcharfun
);
514 (*readbyte
) (buf
[i
], readcharfun
);
515 return BYTE8_TO_CHAR (buf
[0]);
522 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
523 code
= buf
[1] & 0x7F;
527 if (buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11
528 || buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12
)
530 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
531 code
= buf
[2] & 0x7F;
535 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
536 code
= ((buf
[1] << 8) | buf
[2]) & 0x7F7F;
541 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
542 code
= ((buf
[2] << 8) | buf
[3]) & 0x7F7F;
544 c
= DECODE_CHAR (charset
, code
);
546 Fsignal (Qinvalid_read_syntax
,
547 Fcons (build_string ("invalid multibyte form"), Qnil
));
552 static Lisp_Object
read_internal_start (Lisp_Object
, Lisp_Object
,
554 static Lisp_Object
read0 (Lisp_Object
);
555 static Lisp_Object
read1 (Lisp_Object
, int *, int);
557 static Lisp_Object
read_list (int, Lisp_Object
);
558 static Lisp_Object
read_vector (Lisp_Object
, int);
560 static Lisp_Object
substitute_object_recurse (Lisp_Object
, Lisp_Object
,
562 static void substitute_object_in_subtree (Lisp_Object
,
564 static void substitute_in_interval (INTERVAL
, Lisp_Object
);
567 /* Get a character from the tty. */
569 /* Read input events until we get one that's acceptable for our purposes.
571 If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed
572 until we get a character we like, and then stuffed into
575 If ASCII_REQUIRED is non-zero, we check function key events to see
576 if the unmodified version of the symbol has a Qascii_character
577 property, and use that character, if present.
579 If ERROR_NONASCII is non-zero, we signal an error if the input we
580 get isn't an ASCII character with modifiers. If it's zero but
581 ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII
584 If INPUT_METHOD is nonzero, we invoke the current input method
585 if the character warrants that.
587 If SECONDS is a number, we wait that many seconds for input, and
588 return Qnil if no input arrives within that time. */
591 read_filtered_event (int no_switch_frame
, int ascii_required
,
592 int error_nonascii
, int input_method
, Lisp_Object seconds
)
594 Lisp_Object val
, delayed_switch_frame
;
597 #ifdef HAVE_WINDOW_SYSTEM
598 if (display_hourglass_p
)
602 delayed_switch_frame
= Qnil
;
604 /* Compute timeout. */
605 if (NUMBERP (seconds
))
607 EMACS_TIME wait_time
;
609 double duration
= extract_float (seconds
);
611 sec
= (int) duration
;
612 usec
= (duration
- sec
) * 1000000;
613 EMACS_GET_TIME (end_time
);
614 EMACS_SET_SECS_USECS (wait_time
, sec
, usec
);
615 EMACS_ADD_TIME (end_time
, end_time
, wait_time
);
618 /* Read until we get an acceptable event. */
621 val
= read_char (0, 0, 0, (input_method
? Qnil
: Qt
), 0,
622 NUMBERP (seconds
) ? &end_time
: NULL
);
623 while (INTEGERP (val
) && XINT (val
) == -2); /* wrong_kboard_jmpbuf */
628 /* switch-frame events are put off until after the next ASCII
629 character. This is better than signaling an error just because
630 the last characters were typed to a separate minibuffer frame,
631 for example. Eventually, some code which can deal with
632 switch-frame events will read it and process it. */
634 && EVENT_HAS_PARAMETERS (val
)
635 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val
)), Qswitch_frame
))
637 delayed_switch_frame
= val
;
641 if (ascii_required
&& !(NUMBERP (seconds
) && NILP (val
)))
643 /* Convert certain symbols to their ASCII equivalents. */
646 Lisp_Object tem
, tem1
;
647 tem
= Fget (val
, Qevent_symbol_element_mask
);
650 tem1
= Fget (Fcar (tem
), Qascii_character
);
651 /* Merge this symbol's modifier bits
652 with the ASCII equivalent of its basic code. */
654 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
658 /* If we don't have a character now, deal with it appropriately. */
663 Vunread_command_events
= Fcons (val
, Qnil
);
664 error ("Non-character input-event");
671 if (! NILP (delayed_switch_frame
))
672 unread_switch_frame
= delayed_switch_frame
;
676 #ifdef HAVE_WINDOW_SYSTEM
677 if (display_hourglass_p
)
686 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 3, 0,
687 doc
: /* Read a character from the command input (keyboard or macro).
688 It is returned as a number.
689 If the character has modifiers, they are resolved and reflected to the
690 character code if possible (e.g. C-SPC -> 0).
692 If the user generates an event which is not a character (i.e. a mouse
693 click or function key event), `read-char' signals an error. As an
694 exception, switch-frame events are put off until non-character events
696 If you want to read non-character events, or ignore them, call
697 `read-event' or `read-char-exclusive' instead.
699 If the optional argument PROMPT is non-nil, display that as a prompt.
700 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
701 input method is turned on in the current buffer, that input method
702 is used for reading a character.
703 If the optional argument SECONDS is non-nil, it should be a number
704 specifying the maximum number of seconds to wait for input. If no
705 input arrives in that time, return nil. SECONDS may be a
706 floating-point value. */)
707 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
712 message_with_string ("%s", prompt
, 0);
713 val
= read_filtered_event (1, 1, 1, ! NILP (inherit_input_method
), seconds
);
715 return (NILP (val
) ? Qnil
716 : make_number (char_resolve_modifier_mask (XINT (val
))));
719 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 3, 0,
720 doc
: /* Read an event object from the input stream.
721 If the optional argument PROMPT is non-nil, display that as a prompt.
722 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
723 input method is turned on in the current buffer, that input method
724 is used for reading a character.
725 If the optional argument SECONDS is non-nil, it should be a number
726 specifying the maximum number of seconds to wait for input. If no
727 input arrives in that time, return nil. SECONDS may be a
728 floating-point value. */)
729 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
732 message_with_string ("%s", prompt
, 0);
733 return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method
), seconds
);
736 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 3, 0,
737 doc
: /* Read a character from the command input (keyboard or macro).
738 It is returned as a number. Non-character events are ignored.
739 If the character has modifiers, they are resolved and reflected to the
740 character code if possible (e.g. C-SPC -> 0).
742 If the optional argument PROMPT is non-nil, display that as a prompt.
743 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
744 input method is turned on in the current buffer, that input method
745 is used for reading a character.
746 If the optional argument SECONDS is non-nil, it should be a number
747 specifying the maximum number of seconds to wait for input. If no
748 input arrives in that time, return nil. SECONDS may be a
749 floating-point value. */)
750 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
755 message_with_string ("%s", prompt
, 0);
757 val
= read_filtered_event (1, 1, 0, ! NILP (inherit_input_method
), seconds
);
759 return (NILP (val
) ? Qnil
760 : make_number (char_resolve_modifier_mask (XINT (val
))));
763 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
764 doc
: /* Don't use this yourself. */)
767 register Lisp_Object val
;
769 XSETINT (val
, getc (instream
));
777 /* Return true if the lisp code read using READCHARFUN defines a non-nil
778 `lexical-binding' file variable. After returning, the stream is
779 positioned following the first line, if it is a comment, otherwise
783 lisp_file_lexically_bound_p (Lisp_Object readcharfun
)
787 /* The first line isn't a comment, just give up. */
793 /* Look for an appropriate file-variable in the first line. */
797 NOMINAL
, AFTER_FIRST_DASH
, AFTER_ASTERIX
,
798 } beg_end_state
= NOMINAL
;
799 int in_file_vars
= 0;
801 #define UPDATE_BEG_END_STATE(ch) \
802 if (beg_end_state == NOMINAL) \
803 beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \
804 else if (beg_end_state == AFTER_FIRST_DASH) \
805 beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \
806 else if (beg_end_state == AFTER_ASTERIX) \
809 in_file_vars = !in_file_vars; \
810 beg_end_state = NOMINAL; \
813 /* Skip until we get to the file vars, if any. */
817 UPDATE_BEG_END_STATE (ch
);
819 while (!in_file_vars
&& ch
!= '\n' && ch
!= EOF
);
823 char var
[100], val
[100];
828 /* Read a variable name. */
829 while (ch
== ' ' || ch
== '\t')
833 while (ch
!= ':' && ch
!= '\n' && ch
!= EOF
&& in_file_vars
)
835 if (i
< sizeof var
- 1)
837 UPDATE_BEG_END_STATE (ch
);
841 /* Stop scanning if no colon was found before end marker. */
845 while (i
> 0 && (var
[i
- 1] == ' ' || var
[i
- 1] == '\t'))
851 /* Read a variable value. */
854 while (ch
== ' ' || ch
== '\t')
858 while (ch
!= ';' && ch
!= '\n' && ch
!= EOF
&& in_file_vars
)
860 if (i
< sizeof val
- 1)
862 UPDATE_BEG_END_STATE (ch
);
866 /* The value was terminated by an end-marker, which
869 while (i
> 0 && (val
[i
- 1] == ' ' || val
[i
- 1] == '\t'))
873 if (strcmp (var
, "lexical-binding") == 0)
876 rv
= (strcmp (val
, "nil") != 0);
882 while (ch
!= '\n' && ch
!= EOF
)
889 /* Value is a version number of byte compiled code if the file
890 associated with file descriptor FD is a compiled Lisp file that's
891 safe to load. Only files compiled with Emacs are safe to load.
892 Files compiled with XEmacs can lead to a crash in Fbyte_code
893 because of an incompatible change in the byte compiler. */
896 safe_to_load_p (int fd
)
903 /* Read the first few bytes from the file, and look for a line
904 specifying the byte compiler version used. */
905 nbytes
= emacs_read (fd
, buf
, sizeof buf
- 1);
910 /* Skip to the next newline, skipping over the initial `ELC'
911 with NUL bytes following it, but note the version. */
912 for (i
= 0; i
< nbytes
&& buf
[i
] != '\n'; ++i
)
917 || fast_c_string_match_ignore_case (Vbytecomp_version_regexp
,
924 lseek (fd
, 0, SEEK_SET
);
929 /* Callback for record_unwind_protect. Restore the old load list OLD,
930 after loading a file successfully. */
933 record_load_unwind (Lisp_Object old
)
935 return Vloads_in_progress
= old
;
938 /* This handler function is used via internal_condition_case_1. */
941 load_error_handler (Lisp_Object data
)
947 load_warn_old_style_backquotes (Lisp_Object file
)
949 if (!NILP (Vold_style_backquotes
))
952 args
[0] = build_string ("Loading `%s': old-style backquotes detected!");
959 DEFUN ("get-load-suffixes", Fget_load_suffixes
, Sget_load_suffixes
, 0, 0, 0,
960 doc
: /* Return the suffixes that `load' should try if a suffix is \
962 This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */)
965 Lisp_Object lst
= Qnil
, suffixes
= Vload_suffixes
, suffix
, ext
;
966 while (CONSP (suffixes
))
968 Lisp_Object exts
= Vload_file_rep_suffixes
;
969 suffix
= XCAR (suffixes
);
970 suffixes
= XCDR (suffixes
);
975 lst
= Fcons (concat2 (suffix
, ext
), lst
);
978 return Fnreverse (lst
);
981 DEFUN ("load", Fload
, Sload
, 1, 5, 0,
982 doc
: /* Execute a file of Lisp code named FILE.
983 First try FILE with `.elc' appended, then try with `.el',
984 then try FILE unmodified (the exact suffixes in the exact order are
985 determined by `load-suffixes'). Environment variable references in
986 FILE are replaced with their values by calling `substitute-in-file-name'.
987 This function searches the directories in `load-path'.
989 If optional second arg NOERROR is non-nil,
990 report no error if FILE doesn't exist.
991 Print messages at start and end of loading unless
992 optional third arg NOMESSAGE is non-nil (but `force-load-messages'
994 If optional fourth arg NOSUFFIX is non-nil, don't try adding
995 suffixes `.elc' or `.el' to the specified name FILE.
996 If optional fifth arg MUST-SUFFIX is non-nil, insist on
997 the suffix `.elc' or `.el'; don't accept just FILE unless
998 it ends in one of those suffixes or includes a directory name.
1000 If this function fails to find a file, it may look for different
1001 representations of that file before trying another file.
1002 It does so by adding the non-empty suffixes in `load-file-rep-suffixes'
1003 to the file name. Emacs uses this feature mainly to find compressed
1004 versions of files when Auto Compression mode is enabled.
1006 The exact suffixes that this function tries out, in the exact order,
1007 are given by the value of the variable `load-file-rep-suffixes' if
1008 NOSUFFIX is non-nil and by the return value of the function
1009 `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and
1010 MUST-SUFFIX are nil, this function first tries out the latter suffixes
1011 and then the former.
1013 Loading a file records its definitions, and its `provide' and
1014 `require' calls, in an element of `load-history' whose
1015 car is the file name loaded. See `load-history'.
1017 While the file is in the process of being loaded, the variable
1018 `load-in-progress' is non-nil and the variable `load-file-name'
1019 is bound to the file's name.
1021 Return t if the file exists and loads successfully. */)
1022 (Lisp_Object file
, Lisp_Object noerror
, Lisp_Object nomessage
, Lisp_Object nosuffix
, Lisp_Object must_suffix
)
1024 register FILE *stream
;
1025 register int fd
= -1;
1026 int count
= SPECPDL_INDEX ();
1027 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1028 Lisp_Object found
, efound
, hist_file_name
;
1029 /* 1 means we printed the ".el is newer" message. */
1031 /* 1 means we are loading a compiled file. */
1033 Lisp_Object handler
;
1035 const char *fmode
= "r";
1043 CHECK_STRING (file
);
1045 /* If file name is magic, call the handler. */
1046 /* This shouldn't be necessary any more now that `openp' handles it right.
1047 handler = Ffind_file_name_handler (file, Qload);
1048 if (!NILP (handler))
1049 return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */
1051 /* Do this after the handler to avoid
1052 the need to gcpro noerror, nomessage and nosuffix.
1053 (Below here, we care only whether they are nil or not.)
1054 The presence of this call is the result of a historical accident:
1055 it used to be in every file-operation and when it got removed
1056 everywhere, it accidentally stayed here. Since then, enough people
1057 supposedly have things like (load "$PROJECT/foo.el") in their .emacs
1058 that it seemed risky to remove. */
1059 if (! NILP (noerror
))
1061 file
= internal_condition_case_1 (Fsubstitute_in_file_name
, file
,
1062 Qt
, load_error_handler
);
1067 file
= Fsubstitute_in_file_name (file
);
1070 /* Avoid weird lossage with null string as arg,
1071 since it would try to load a directory as a Lisp file */
1072 if (SCHARS (file
) > 0)
1074 int size
= SBYTES (file
);
1077 GCPRO2 (file
, found
);
1079 if (! NILP (must_suffix
))
1081 /* Don't insist on adding a suffix if FILE already ends with one. */
1083 && !strcmp (SSDATA (file
) + size
- 3, ".el"))
1086 && !strcmp (SSDATA (file
) + size
- 4, ".elc"))
1088 /* Don't insist on adding a suffix
1089 if the argument includes a directory name. */
1090 else if (! NILP (Ffile_name_directory (file
)))
1094 fd
= openp (Vload_path
, file
,
1095 (!NILP (nosuffix
) ? Qnil
1096 : !NILP (must_suffix
) ? Fget_load_suffixes ()
1097 : Fappend (2, (tmp
[0] = Fget_load_suffixes (),
1098 tmp
[1] = Vload_file_rep_suffixes
,
1107 xsignal2 (Qfile_error
, build_string ("Cannot open load file"), file
);
1111 /* Tell startup.el whether or not we found the user's init file. */
1112 if (EQ (Qt
, Vuser_init_file
))
1113 Vuser_init_file
= found
;
1115 /* If FD is -2, that means openp found a magic file. */
1118 if (NILP (Fequal (found
, file
)))
1119 /* If FOUND is a different file name from FILE,
1120 find its handler even if we have already inhibited
1121 the `load' operation on FILE. */
1122 handler
= Ffind_file_name_handler (found
, Qt
);
1124 handler
= Ffind_file_name_handler (found
, Qload
);
1125 if (! NILP (handler
))
1126 return call5 (handler
, Qload
, found
, noerror
, nomessage
, Qt
);
1129 /* Check if we're stuck in a recursive load cycle.
1131 2000-09-21: It's not possible to just check for the file loaded
1132 being a member of Vloads_in_progress. This fails because of the
1133 way the byte compiler currently works; `provide's are not
1134 evaluated, see font-lock.el/jit-lock.el as an example. This
1135 leads to a certain amount of ``normal'' recursion.
1137 Also, just loading a file recursively is not always an error in
1138 the general case; the second load may do something different. */
1142 for (tem
= Vloads_in_progress
; CONSP (tem
); tem
= XCDR (tem
))
1143 if (!NILP (Fequal (found
, XCAR (tem
))) && (++load_count
> 3))
1147 signal_error ("Recursive load", Fcons (found
, Vloads_in_progress
));
1149 record_unwind_protect (record_load_unwind
, Vloads_in_progress
);
1150 Vloads_in_progress
= Fcons (found
, Vloads_in_progress
);
1153 /* All loads are by default dynamic, unless the file itself specifies
1154 otherwise using a file-variable in the first line. This is bound here
1155 so that it takes effect whether or not we use
1156 Vload_source_file_function. */
1157 specbind (Qlexical_binding
, Qnil
);
1159 /* Get the name for load-history. */
1160 hist_file_name
= (! NILP (Vpurify_flag
)
1161 ? Fconcat (2, (tmp
[0] = Ffile_name_directory (file
),
1162 tmp
[1] = Ffile_name_nondirectory (found
),
1168 /* Check for the presence of old-style quotes and warn about them. */
1169 specbind (Qold_style_backquotes
, Qnil
);
1170 record_unwind_protect (load_warn_old_style_backquotes
, file
);
1172 if (!memcmp (SDATA (found
) + SBYTES (found
) - 4, ".elc", 4)
1173 || (fd
>= 0 && (version
= safe_to_load_p (fd
)) > 0))
1174 /* Load .elc files directly, but not when they are
1175 remote and have no handler! */
1182 GCPRO3 (file
, found
, hist_file_name
);
1185 && ! (version
= safe_to_load_p (fd
)))
1188 if (!load_dangerous_libraries
)
1192 error ("File `%s' was not compiled in Emacs",
1195 else if (!NILP (nomessage
) && !force_load_messages
)
1196 message_with_string ("File `%s' not compiled in Emacs", found
, 1);
1201 efound
= ENCODE_FILE (found
);
1206 result
= stat (SSDATA (efound
), &s1
);
1209 SSET (efound
, SBYTES (efound
) - 1, 0);
1210 result
= stat (SSDATA (efound
), &s2
);
1211 SSET (efound
, SBYTES (efound
) - 1, 'c');
1214 if (result
== 0 && s1
.st_mtime
< s2
.st_mtime
)
1216 /* Make the progress messages mention that source is newer. */
1219 /* If we won't print another message, mention this anyway. */
1220 if (!NILP (nomessage
) && !force_load_messages
)
1222 Lisp_Object msg_file
;
1223 msg_file
= Fsubstring (found
, make_number (0), make_number (-1));
1224 message_with_string ("Source file `%s' newer than byte-compiled file",
1233 /* We are loading a source file (*.el). */
1234 if (!NILP (Vload_source_file_function
))
1240 val
= call4 (Vload_source_file_function
, found
, hist_file_name
,
1241 NILP (noerror
) ? Qnil
: Qt
,
1242 (NILP (nomessage
) || force_load_messages
) ? Qnil
: Qt
);
1243 return unbind_to (count
, val
);
1247 GCPRO3 (file
, found
, hist_file_name
);
1251 efound
= ENCODE_FILE (found
);
1252 stream
= fopen (SSDATA (efound
), fmode
);
1253 #else /* not WINDOWSNT */
1254 stream
= fdopen (fd
, fmode
);
1255 #endif /* not WINDOWSNT */
1259 error ("Failure to create stdio stream for %s", SDATA (file
));
1262 if (! NILP (Vpurify_flag
))
1263 Vpreloaded_file_list
= Fcons (Fpurecopy(file
), Vpreloaded_file_list
);
1265 if (NILP (nomessage
) || force_load_messages
)
1268 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...",
1271 message_with_string ("Loading %s (source)...", file
, 1);
1273 message_with_string ("Loading %s (compiled; note, source file is newer)...",
1275 else /* The typical case; compiled file newer than source file. */
1276 message_with_string ("Loading %s...", file
, 1);
1279 record_unwind_protect (load_unwind
, make_save_value (stream
, 0));
1280 record_unwind_protect (load_descriptor_unwind
, load_descriptor_list
);
1281 specbind (Qload_file_name
, found
);
1282 specbind (Qinhibit_file_name_operation
, Qnil
);
1283 load_descriptor_list
1284 = Fcons (make_number (fileno (stream
)), load_descriptor_list
);
1285 specbind (Qload_in_progress
, Qt
);
1288 if (lisp_file_lexically_bound_p (Qget_file_char
))
1289 Fset (Qlexical_binding
, Qt
);
1291 if (! version
|| version
>= 22)
1292 readevalloop (Qget_file_char
, stream
, hist_file_name
,
1293 0, Qnil
, Qnil
, Qnil
, Qnil
);
1296 /* We can't handle a file which was compiled with
1297 byte-compile-dynamic by older version of Emacs. */
1298 specbind (Qload_force_doc_strings
, Qt
);
1299 readevalloop (Qget_emacs_mule_file_char
, stream
, hist_file_name
,
1300 0, Qnil
, Qnil
, Qnil
, Qnil
);
1302 unbind_to (count
, Qnil
);
1304 /* Run any eval-after-load forms for this file */
1305 if (!NILP (Ffboundp (Qdo_after_load_evaluation
)))
1306 call1 (Qdo_after_load_evaluation
, hist_file_name
) ;
1310 xfree (saved_doc_string
);
1311 saved_doc_string
= 0;
1312 saved_doc_string_size
= 0;
1314 xfree (prev_saved_doc_string
);
1315 prev_saved_doc_string
= 0;
1316 prev_saved_doc_string_size
= 0;
1318 if (!noninteractive
&& (NILP (nomessage
) || force_load_messages
))
1321 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done",
1324 message_with_string ("Loading %s (source)...done", file
, 1);
1326 message_with_string ("Loading %s (compiled; note, source file is newer)...done",
1328 else /* The typical case; compiled file newer than source file. */
1329 message_with_string ("Loading %s...done", file
, 1);
1336 load_unwind (Lisp_Object arg
) /* used as unwind-protect function in load */
1338 FILE *stream
= (FILE *) XSAVE_VALUE (arg
)->pointer
;
1349 load_descriptor_unwind (Lisp_Object oldlist
)
1351 load_descriptor_list
= oldlist
;
1355 /* Close all descriptors in use for Floads.
1356 This is used when starting a subprocess. */
1359 close_load_descs (void)
1363 for (tail
= load_descriptor_list
; CONSP (tail
); tail
= XCDR (tail
))
1364 emacs_close (XFASTINT (XCAR (tail
)));
1369 complete_filename_p (Lisp_Object pathname
)
1371 register const unsigned char *s
= SDATA (pathname
);
1372 return (IS_DIRECTORY_SEP (s
[0])
1373 || (SCHARS (pathname
) > 2
1374 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2])));
1377 DEFUN ("locate-file-internal", Flocate_file_internal
, Slocate_file_internal
, 2, 4, 0,
1378 doc
: /* Search for FILENAME through PATH.
1379 Returns the file's name in absolute form, or nil if not found.
1380 If SUFFIXES is non-nil, it should be a list of suffixes to append to
1381 file name when searching.
1382 If non-nil, PREDICATE is used instead of `file-readable-p'.
1383 PREDICATE can also be an integer to pass to the access(2) function,
1384 in which case file-name-handlers are ignored.
1385 This function will normally skip directories, so if you want it to find
1386 directories, make sure the PREDICATE function returns `dir-ok' for them. */)
1387 (Lisp_Object filename
, Lisp_Object path
, Lisp_Object suffixes
, Lisp_Object predicate
)
1390 int fd
= openp (path
, filename
, suffixes
, &file
, predicate
);
1391 if (NILP (predicate
) && fd
> 0)
1396 static Lisp_Object Qdir_ok
;
1398 /* Search for a file whose name is STR, looking in directories
1399 in the Lisp list PATH, and trying suffixes from SUFFIX.
1400 On success, returns a file descriptor. On failure, returns -1.
1402 SUFFIXES is a list of strings containing possible suffixes.
1403 The empty suffix is automatically added if the list is empty.
1405 PREDICATE non-nil means don't open the files,
1406 just look for one that satisfies the predicate. In this case,
1407 returns 1 on success. The predicate can be a lisp function or
1408 an integer to pass to `access' (in which case file-name-handlers
1411 If STOREPTR is nonzero, it points to a slot where the name of
1412 the file actually found should be stored as a Lisp string.
1413 nil is stored there on failure.
1415 If the file we find is remote, return -2
1416 but store the found remote file name in *STOREPTR. */
1419 openp (Lisp_Object path
, Lisp_Object str
, Lisp_Object suffixes
, Lisp_Object
*storeptr
, Lisp_Object predicate
)
1422 EMACS_INT fn_size
= 100;
1424 register char *fn
= buf
;
1426 EMACS_INT want_length
;
1427 Lisp_Object filename
;
1429 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
, gcpro6
;
1430 Lisp_Object string
, tail
, encoded_fn
;
1431 EMACS_INT max_suffix_len
= 0;
1435 for (tail
= suffixes
; CONSP (tail
); tail
= XCDR (tail
))
1437 CHECK_STRING_CAR (tail
);
1438 max_suffix_len
= max (max_suffix_len
,
1439 SBYTES (XCAR (tail
)));
1442 string
= filename
= encoded_fn
= Qnil
;
1443 GCPRO6 (str
, string
, filename
, path
, suffixes
, encoded_fn
);
1448 if (complete_filename_p (str
))
1451 for (; CONSP (path
); path
= XCDR (path
))
1453 filename
= Fexpand_file_name (str
, XCAR (path
));
1454 if (!complete_filename_p (filename
))
1455 /* If there are non-absolute elts in PATH (eg ".") */
1456 /* Of course, this could conceivably lose if luser sets
1457 default-directory to be something non-absolute... */
1459 filename
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
1460 if (!complete_filename_p (filename
))
1461 /* Give up on this path element! */
1465 /* Calculate maximum length of any filename made from
1466 this path element/specified file name and any possible suffix. */
1467 want_length
= max_suffix_len
+ SBYTES (filename
);
1468 if (fn_size
<= want_length
)
1469 fn
= (char *) alloca (fn_size
= 100 + want_length
);
1471 /* Loop over suffixes. */
1472 for (tail
= NILP (suffixes
) ? Fcons (empty_unibyte_string
, Qnil
) : suffixes
;
1473 CONSP (tail
); tail
= XCDR (tail
))
1475 int lsuffix
= SBYTES (XCAR (tail
));
1476 Lisp_Object handler
;
1479 /* Concatenate path element/specified name with the suffix.
1480 If the directory starts with /:, remove that. */
1481 if (SCHARS (filename
) > 2
1482 && SREF (filename
, 0) == '/'
1483 && SREF (filename
, 1) == ':')
1485 strncpy (fn
, SSDATA (filename
) + 2,
1486 SBYTES (filename
) - 2);
1487 fn
[SBYTES (filename
) - 2] = 0;
1491 strncpy (fn
, SSDATA (filename
),
1493 fn
[SBYTES (filename
)] = 0;
1496 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
1497 strncat (fn
, SSDATA (XCAR (tail
)), lsuffix
);
1499 /* Check that the file exists and is not a directory. */
1500 /* We used to only check for handlers on non-absolute file names:
1504 handler = Ffind_file_name_handler (filename, Qfile_exists_p);
1505 It's not clear why that was the case and it breaks things like
1506 (load "/bar.el") where the file is actually "/bar.el.gz". */
1507 string
= build_string (fn
);
1508 handler
= Ffind_file_name_handler (string
, Qfile_exists_p
);
1509 if ((!NILP (handler
) || !NILP (predicate
)) && !NATNUMP (predicate
))
1511 if (NILP (predicate
))
1512 exists
= !NILP (Ffile_readable_p (string
));
1515 Lisp_Object tmp
= call1 (predicate
, string
);
1516 exists
= !NILP (tmp
)
1517 && (EQ (tmp
, Qdir_ok
)
1518 || NILP (Ffile_directory_p (string
)));
1523 /* We succeeded; return this descriptor and filename. */
1534 encoded_fn
= ENCODE_FILE (string
);
1535 pfn
= SSDATA (encoded_fn
);
1536 exists
= (stat (pfn
, &st
) == 0 && ! S_ISDIR (st
.st_mode
));
1539 /* Check that we can access or open it. */
1540 if (NATNUMP (predicate
))
1541 fd
= (access (pfn
, XFASTINT (predicate
)) == 0) ? 1 : -1;
1543 fd
= emacs_open (pfn
, O_RDONLY
, 0);
1547 /* We succeeded; return this descriptor and filename. */
1565 /* Merge the list we've accumulated of globals from the current input source
1566 into the load_history variable. The details depend on whether
1567 the source has an associated file name or not.
1569 FILENAME is the file name that we are loading from.
1570 ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */
1573 build_load_history (Lisp_Object filename
, int entire
)
1575 register Lisp_Object tail
, prev
, newelt
;
1576 register Lisp_Object tem
, tem2
;
1577 register int foundit
= 0;
1579 tail
= Vload_history
;
1582 while (CONSP (tail
))
1586 /* Find the feature's previous assoc list... */
1587 if (!NILP (Fequal (filename
, Fcar (tem
))))
1591 /* If we're loading the entire file, remove old data. */
1595 Vload_history
= XCDR (tail
);
1597 Fsetcdr (prev
, XCDR (tail
));
1600 /* Otherwise, cons on new symbols that are not already members. */
1603 tem2
= Vcurrent_load_list
;
1605 while (CONSP (tem2
))
1607 newelt
= XCAR (tem2
);
1609 if (NILP (Fmember (newelt
, tem
)))
1610 Fsetcar (tail
, Fcons (XCAR (tem
),
1611 Fcons (newelt
, XCDR (tem
))));
1624 /* If we're loading an entire file, cons the new assoc onto the
1625 front of load-history, the most-recently-loaded position. Also
1626 do this if we didn't find an existing member for the file. */
1627 if (entire
|| !foundit
)
1628 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
1633 unreadpure (Lisp_Object junk
) /* Used as unwind-protect function in readevalloop */
1640 readevalloop_1 (Lisp_Object old
)
1642 load_convert_to_unibyte
= ! NILP (old
);
1646 /* Signal an `end-of-file' error, if possible with file name
1650 end_of_file_error (void)
1652 if (STRINGP (Vload_file_name
))
1653 xsignal1 (Qend_of_file
, Vload_file_name
);
1655 xsignal0 (Qend_of_file
);
1658 /* UNIBYTE specifies how to set load_convert_to_unibyte
1659 for this invocation.
1660 READFUN, if non-nil, is used instead of `read'.
1662 START, END specify region to read in current buffer (from eval-region).
1663 If the input is not from a buffer, they must be nil. */
1666 readevalloop (Lisp_Object readcharfun
,
1668 Lisp_Object sourcename
,
1670 Lisp_Object unibyte
, Lisp_Object readfun
,
1671 Lisp_Object start
, Lisp_Object end
)
1674 register Lisp_Object val
;
1675 int count
= SPECPDL_INDEX ();
1676 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1677 struct buffer
*b
= 0;
1678 int continue_reading_p
;
1679 Lisp_Object lex_bound
;
1680 /* Nonzero if reading an entire buffer. */
1681 int whole_buffer
= 0;
1682 /* 1 on the first time around. */
1685 if (MARKERP (readcharfun
))
1688 start
= readcharfun
;
1691 if (BUFFERP (readcharfun
))
1692 b
= XBUFFER (readcharfun
);
1693 else if (MARKERP (readcharfun
))
1694 b
= XMARKER (readcharfun
)->buffer
;
1696 /* We assume START is nil when input is not from a buffer. */
1697 if (! NILP (start
) && !b
)
1700 specbind (Qstandard_input
, readcharfun
); /* GCPROs readcharfun. */
1701 specbind (Qcurrent_load_list
, Qnil
);
1702 record_unwind_protect (readevalloop_1
, load_convert_to_unibyte
? Qt
: Qnil
);
1703 load_convert_to_unibyte
= !NILP (unibyte
);
1705 /* If lexical binding is active (either because it was specified in
1706 the file's header, or via a buffer-local variable), create an empty
1707 lexical environment, otherwise, turn off lexical binding. */
1708 lex_bound
= find_symbol_value (Qlexical_binding
);
1709 specbind (Qinternal_interpreter_environment
,
1710 NILP (lex_bound
) || EQ (lex_bound
, Qunbound
)
1711 ? Qnil
: Fcons (Qt
, Qnil
));
1713 GCPRO4 (sourcename
, readfun
, start
, end
);
1715 /* Try to ensure sourcename is a truename, except whilst preloading. */
1716 if (NILP (Vpurify_flag
)
1717 && !NILP (sourcename
) && !NILP (Ffile_name_absolute_p (sourcename
))
1718 && !NILP (Ffboundp (Qfile_truename
)))
1719 sourcename
= call1 (Qfile_truename
, sourcename
) ;
1721 LOADHIST_ATTACH (sourcename
);
1723 continue_reading_p
= 1;
1724 while (continue_reading_p
)
1726 int count1
= SPECPDL_INDEX ();
1728 if (b
!= 0 && NILP (BVAR (b
, name
)))
1729 error ("Reading from killed buffer");
1733 /* Switch to the buffer we are reading from. */
1734 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1735 set_buffer_internal (b
);
1737 /* Save point in it. */
1738 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1739 /* Save ZV in it. */
1740 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1741 /* Those get unbound after we read one expression. */
1743 /* Set point and ZV around stuff to be read. */
1746 Fnarrow_to_region (make_number (BEGV
), end
);
1748 /* Just for cleanliness, convert END to a marker
1749 if it is an integer. */
1751 end
= Fpoint_max_marker ();
1754 /* On the first cycle, we can easily test here
1755 whether we are reading the whole buffer. */
1756 if (b
&& first_sexp
)
1757 whole_buffer
= (PT
== BEG
&& ZV
== Z
);
1764 while ((c
= READCHAR
) != '\n' && c
!= -1);
1769 unbind_to (count1
, Qnil
);
1773 /* Ignore whitespace here, so we can detect eof. */
1774 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r'
1775 || c
== 0x8a0) /* NBSP */
1778 if (!NILP (Vpurify_flag
) && c
== '(')
1780 record_unwind_protect (unreadpure
, Qnil
);
1781 val
= read_list (-1, readcharfun
);
1786 read_objects
= Qnil
;
1787 if (!NILP (readfun
))
1789 val
= call1 (readfun
, readcharfun
);
1791 /* If READCHARFUN has set point to ZV, we should
1792 stop reading, even if the form read sets point
1793 to a different value when evaluated. */
1794 if (BUFFERP (readcharfun
))
1796 struct buffer
*buf
= XBUFFER (readcharfun
);
1797 if (BUF_PT (buf
) == BUF_ZV (buf
))
1798 continue_reading_p
= 0;
1801 else if (! NILP (Vload_read_function
))
1802 val
= call1 (Vload_read_function
, readcharfun
);
1804 val
= read_internal_start (readcharfun
, Qnil
, Qnil
);
1807 if (!NILP (start
) && continue_reading_p
)
1808 start
= Fpoint_marker ();
1810 /* Restore saved point and BEGV. */
1811 unbind_to (count1
, Qnil
);
1813 /* Now eval what we just read. */
1814 val
= eval_sub (val
);
1818 Vvalues
= Fcons (val
, Vvalues
);
1819 if (EQ (Vstandard_output
, Qt
))
1828 build_load_history (sourcename
,
1829 stream
|| whole_buffer
);
1833 unbind_to (count
, Qnil
);
1836 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 5, "",
1837 doc
: /* Execute the current buffer as Lisp code.
1838 When called from a Lisp program (i.e., not interactively), this
1839 function accepts up to five optional arguments:
1840 BUFFER is the buffer to evaluate (nil means use current buffer).
1841 PRINTFLAG controls printing of output:
1842 A value of nil means discard it; anything else is stream for print.
1843 FILENAME specifies the file name to use for `load-history'.
1844 UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this
1846 DO-ALLOW-PRINT, if non-nil, specifies that `print' and related
1847 functions should work normally even if PRINTFLAG is nil.
1849 This function preserves the position of point. */)
1850 (Lisp_Object buffer
, Lisp_Object printflag
, Lisp_Object filename
, Lisp_Object unibyte
, Lisp_Object do_allow_print
)
1852 int count
= SPECPDL_INDEX ();
1853 Lisp_Object tem
, buf
;
1856 buf
= Fcurrent_buffer ();
1858 buf
= Fget_buffer (buffer
);
1860 error ("No such buffer");
1862 if (NILP (printflag
) && NILP (do_allow_print
))
1867 if (NILP (filename
))
1868 filename
= BVAR (XBUFFER (buf
), filename
);
1870 specbind (Qeval_buffer_list
, Fcons (buf
, Veval_buffer_list
));
1871 specbind (Qstandard_output
, tem
);
1872 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1873 BUF_TEMP_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
1874 specbind (Qlexical_binding
, lisp_file_lexically_bound_p (buf
) ? Qt
: Qnil
);
1875 readevalloop (buf
, 0, filename
,
1876 !NILP (printflag
), unibyte
, Qnil
, Qnil
, Qnil
);
1877 unbind_to (count
, Qnil
);
1882 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 4, "r",
1883 doc
: /* Execute the region as Lisp code.
1884 When called from programs, expects two arguments,
1885 giving starting and ending indices in the current buffer
1886 of the text to be executed.
1887 Programs can pass third argument PRINTFLAG which controls output:
1888 A value of nil means discard it; anything else is stream for printing it.
1889 Also the fourth argument READ-FUNCTION, if non-nil, is used
1890 instead of `read' to read each expression. It gets one argument
1891 which is the input stream for reading characters.
1893 This function does not move point. */)
1894 (Lisp_Object start
, Lisp_Object end
, Lisp_Object printflag
, Lisp_Object read_function
)
1896 /* FIXME: Do the eval-sexp-add-defvars danse! */
1897 int count
= SPECPDL_INDEX ();
1898 Lisp_Object tem
, cbuf
;
1900 cbuf
= Fcurrent_buffer ();
1902 if (NILP (printflag
))
1906 specbind (Qstandard_output
, tem
);
1907 specbind (Qeval_buffer_list
, Fcons (cbuf
, Veval_buffer_list
));
1909 /* readevalloop calls functions which check the type of start and end. */
1910 readevalloop (cbuf
, 0, BVAR (XBUFFER (cbuf
), filename
),
1911 !NILP (printflag
), Qnil
, read_function
,
1914 return unbind_to (count
, Qnil
);
1918 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
1919 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
1920 If STREAM is nil, use the value of `standard-input' (which see).
1921 STREAM or the value of `standard-input' may be:
1922 a buffer (read from point and advance it)
1923 a marker (read from where it points and advance it)
1924 a function (call it with no arguments for each character,
1925 call it with a char as argument to push a char back)
1926 a string (takes text from string, starting at the beginning)
1927 t (read text line using minibuffer and use it, or read from
1928 standard input in batch mode). */)
1929 (Lisp_Object stream
)
1932 stream
= Vstandard_input
;
1933 if (EQ (stream
, Qt
))
1934 stream
= Qread_char
;
1935 if (EQ (stream
, Qread_char
))
1936 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
1938 return read_internal_start (stream
, Qnil
, Qnil
);
1941 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
1942 doc
: /* Read one Lisp expression which is represented as text by STRING.
1943 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1944 START and END optionally delimit a substring of STRING from which to read;
1945 they default to 0 and (length STRING) respectively. */)
1946 (Lisp_Object string
, Lisp_Object start
, Lisp_Object end
)
1949 CHECK_STRING (string
);
1950 /* read_internal_start sets read_from_string_index. */
1951 ret
= read_internal_start (string
, start
, end
);
1952 return Fcons (ret
, make_number (read_from_string_index
));
1955 /* Function to set up the global context we need in toplevel read
1958 read_internal_start (Lisp_Object stream
, Lisp_Object start
, Lisp_Object end
)
1959 /* start, end only used when stream is a string. */
1964 new_backquote_flag
= 0;
1965 read_objects
= Qnil
;
1966 if (EQ (Vread_with_symbol_positions
, Qt
)
1967 || EQ (Vread_with_symbol_positions
, stream
))
1968 Vread_symbol_positions_list
= Qnil
;
1970 if (STRINGP (stream
)
1971 || ((CONSP (stream
) && STRINGP (XCAR (stream
)))))
1973 EMACS_INT startval
, endval
;
1976 if (STRINGP (stream
))
1979 string
= XCAR (stream
);
1982 endval
= SCHARS (string
);
1986 endval
= XINT (end
);
1987 if (endval
< 0 || endval
> SCHARS (string
))
1988 args_out_of_range (string
, end
);
1995 CHECK_NUMBER (start
);
1996 startval
= XINT (start
);
1997 if (startval
< 0 || startval
> endval
)
1998 args_out_of_range (string
, start
);
2000 read_from_string_index
= startval
;
2001 read_from_string_index_byte
= string_char_to_byte (string
, startval
);
2002 read_from_string_limit
= endval
;
2005 retval
= read0 (stream
);
2006 if (EQ (Vread_with_symbol_positions
, Qt
)
2007 || EQ (Vread_with_symbol_positions
, stream
))
2008 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
2013 /* Signal Qinvalid_read_syntax error.
2014 S is error string of length N (if > 0) */
2017 invalid_syntax (const char *s
)
2019 xsignal1 (Qinvalid_read_syntax
, build_string (s
));
2023 /* Use this for recursive reads, in contexts where internal tokens
2027 read0 (Lisp_Object readcharfun
)
2029 register Lisp_Object val
;
2032 val
= read1 (readcharfun
, &c
, 0);
2036 xsignal1 (Qinvalid_read_syntax
,
2037 Fmake_string (make_number (1), make_number (c
)));
2040 static int read_buffer_size
;
2041 static char *read_buffer
;
2043 /* Read a \-escape sequence, assuming we already read the `\'.
2044 If the escape sequence forces unibyte, return eight-bit char. */
2047 read_escape (Lisp_Object readcharfun
, int stringp
)
2049 register int c
= READCHAR
;
2050 /* \u allows up to four hex digits, \U up to eight. Default to the
2051 behavior for \u, and change this value in the case that \U is seen. */
2052 int unicode_hex_count
= 4;
2057 end_of_file_error ();
2087 error ("Invalid escape character syntax");
2090 c
= read_escape (readcharfun
, 0);
2091 return c
| meta_modifier
;
2096 error ("Invalid escape character syntax");
2099 c
= read_escape (readcharfun
, 0);
2100 return c
| shift_modifier
;
2105 error ("Invalid escape character syntax");
2108 c
= read_escape (readcharfun
, 0);
2109 return c
| hyper_modifier
;
2114 error ("Invalid escape character syntax");
2117 c
= read_escape (readcharfun
, 0);
2118 return c
| alt_modifier
;
2122 if (stringp
|| c
!= '-')
2129 c
= read_escape (readcharfun
, 0);
2130 return c
| super_modifier
;
2135 error ("Invalid escape character syntax");
2139 c
= read_escape (readcharfun
, 0);
2140 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
2141 return 0177 | (c
& CHAR_MODIFIER_MASK
);
2142 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
2143 return c
| ctrl_modifier
;
2144 /* ASCII control chars are made from letters (both cases),
2145 as well as the non-letters within 0100...0137. */
2146 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
2147 return (c
& (037 | ~0177));
2148 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
2149 return (c
& (037 | ~0177));
2151 return c
| ctrl_modifier
;
2161 /* An octal escape, as in ANSI C. */
2163 register int i
= c
- '0';
2164 register int count
= 0;
2167 if ((c
= READCHAR
) >= '0' && c
<= '7')
2179 if (i
>= 0x80 && i
< 0x100)
2180 i
= BYTE8_TO_CHAR (i
);
2185 /* A hex escape, as in ANSI C. */
2192 if (c
>= '0' && c
<= '9')
2197 else if ((c
>= 'a' && c
<= 'f')
2198 || (c
>= 'A' && c
<= 'F'))
2201 if (c
>= 'a' && c
<= 'f')
2212 error ("Hex character out of range: \\x%x...", i
);
2216 if (count
< 3 && i
>= 0x80)
2217 return BYTE8_TO_CHAR (i
);
2222 /* Post-Unicode-2.0: Up to eight hex chars. */
2223 unicode_hex_count
= 8;
2226 /* A Unicode escape. We only permit them in strings and characters,
2227 not arbitrarily in the source code, as in some other languages. */
2232 while (++count
<= unicode_hex_count
)
2235 /* isdigit and isalpha may be locale-specific, which we don't
2237 if (c
>= '0' && c
<= '9') i
= (i
<< 4) + (c
- '0');
2238 else if (c
>= 'a' && c
<= 'f') i
= (i
<< 4) + (c
- 'a') + 10;
2239 else if (c
>= 'A' && c
<= 'F') i
= (i
<< 4) + (c
- 'A') + 10;
2241 error ("Non-hex digit used for Unicode escape");
2244 error ("Non-Unicode character: 0x%x", i
);
2253 /* Return the digit that CHARACTER stands for in the given BASE.
2254 Return -1 if CHARACTER is out of range for BASE,
2255 and -2 if CHARACTER is not valid for any supported BASE. */
2257 digit_to_number (int character
, int base
)
2261 if ('0' <= character
&& character
<= '9')
2262 digit
= character
- '0';
2263 else if ('a' <= character
&& character
<= 'z')
2264 digit
= character
- 'a' + 10;
2265 else if ('A' <= character
&& character
<= 'Z')
2266 digit
= character
- 'A' + 10;
2270 return digit
< base
? digit
: -1;
2273 /* Read an integer in radix RADIX using READCHARFUN to read
2274 characters. RADIX must be in the interval [2..36]; if it isn't, a
2275 read error is signaled . Value is the integer read. Signals an
2276 error if encountering invalid read syntax or if RADIX is out of
2280 read_integer (Lisp_Object readcharfun
, int radix
)
2282 /* Room for sign, leading 0, other digits, trailing null byte. */
2283 char buf
[1 + 1 + sizeof (uintmax_t) * CHAR_BIT
+ 1];
2285 int valid
= -1; /* 1 if valid, 0 if not, -1 if incomplete. */
2287 if (radix
< 2 || radix
> 36)
2295 if (c
== '-' || c
== '+')
2306 /* Ignore redundant leading zeros, so the buffer doesn't
2307 fill up with them. */
2313 while (-1 <= (digit
= digit_to_number (c
, radix
)))
2320 if (p
< buf
+ sizeof buf
- 1)
2335 sprintf (buf
, "integer, radix %d", radix
);
2336 invalid_syntax (buf
);
2339 return string_to_number (buf
, radix
, 0);
2343 /* If the next token is ')' or ']' or '.', we store that character
2344 in *PCH and the return value is not interesting. Else, we store
2345 zero in *PCH and we read and return one lisp object.
2347 FIRST_IN_LIST is nonzero if this is the first element of a list. */
2350 read1 (register Lisp_Object readcharfun
, int *pch
, int first_in_list
)
2353 unsigned uninterned_symbol
= 0;
2361 c
= READCHAR_REPORT_MULTIBYTE (&multibyte
);
2363 end_of_file_error ();
2368 return read_list (0, readcharfun
);
2371 return read_vector (readcharfun
, 0);
2387 /* Accept extended format for hashtables (extensible to
2389 #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */
2390 Lisp_Object tmp
= read_list (0, readcharfun
);
2391 Lisp_Object head
= CAR_SAFE (tmp
);
2392 Lisp_Object data
= Qnil
;
2393 Lisp_Object val
= Qnil
;
2394 /* The size is 2 * number of allowed keywords to
2396 Lisp_Object params
[10];
2398 Lisp_Object key
= Qnil
;
2399 int param_count
= 0;
2401 if (!EQ (head
, Qhash_table
))
2402 error ("Invalid extended read marker at head of #s list "
2403 "(only hash-table allowed)");
2405 tmp
= CDR_SAFE (tmp
);
2407 /* This is repetitive but fast and simple. */
2408 params
[param_count
] = QCsize
;
2409 params
[param_count
+1] = Fplist_get (tmp
, Qsize
);
2410 if (!NILP (params
[param_count
+ 1]))
2413 params
[param_count
] = QCtest
;
2414 params
[param_count
+1] = Fplist_get (tmp
, Qtest
);
2415 if (!NILP (params
[param_count
+ 1]))
2418 params
[param_count
] = QCweakness
;
2419 params
[param_count
+1] = Fplist_get (tmp
, Qweakness
);
2420 if (!NILP (params
[param_count
+ 1]))
2423 params
[param_count
] = QCrehash_size
;
2424 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_size
);
2425 if (!NILP (params
[param_count
+ 1]))
2428 params
[param_count
] = QCrehash_threshold
;
2429 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_threshold
);
2430 if (!NILP (params
[param_count
+ 1]))
2433 /* This is the hashtable data. */
2434 data
= Fplist_get (tmp
, Qdata
);
2436 /* Now use params to make a new hashtable and fill it. */
2437 ht
= Fmake_hash_table (param_count
, params
);
2439 while (CONSP (data
))
2444 error ("Odd number of elements in hashtable data");
2447 Fputhash (key
, val
, ht
);
2453 invalid_syntax ("#");
2461 tmp
= read_vector (readcharfun
, 0);
2462 if (ASIZE (tmp
) < CHAR_TABLE_STANDARD_SLOTS
)
2463 error ("Invalid size char-table");
2464 XSETPVECTYPE (XVECTOR (tmp
), PVEC_CHAR_TABLE
);
2475 tmp
= read_vector (readcharfun
, 0);
2476 if (!INTEGERP (AREF (tmp
, 0)))
2477 error ("Invalid depth in char-table");
2478 depth
= XINT (AREF (tmp
, 0));
2479 if (depth
< 1 || depth
> 3)
2480 error ("Invalid depth in char-table");
2481 size
= ASIZE (tmp
) - 2;
2482 if (chartab_size
[depth
] != size
)
2483 error ("Invalid size char-table");
2484 XSETPVECTYPE (XVECTOR (tmp
), PVEC_SUB_CHAR_TABLE
);
2487 invalid_syntax ("#^^");
2489 invalid_syntax ("#^");
2494 length
= read1 (readcharfun
, pch
, first_in_list
);
2498 Lisp_Object tmp
, val
;
2500 = ((XFASTINT (length
) + BOOL_VECTOR_BITS_PER_CHAR
- 1)
2501 / BOOL_VECTOR_BITS_PER_CHAR
);
2504 tmp
= read1 (readcharfun
, pch
, first_in_list
);
2505 if (STRING_MULTIBYTE (tmp
)
2506 || (size_in_chars
!= SCHARS (tmp
)
2507 /* We used to print 1 char too many
2508 when the number of bits was a multiple of 8.
2509 Accept such input in case it came from an old
2511 && ! (XFASTINT (length
)
2512 == (SCHARS (tmp
) - 1) * BOOL_VECTOR_BITS_PER_CHAR
)))
2513 invalid_syntax ("#&...");
2515 val
= Fmake_bool_vector (length
, Qnil
);
2516 memcpy (XBOOL_VECTOR (val
)->data
, SDATA (tmp
), size_in_chars
);
2517 /* Clear the extraneous bits in the last byte. */
2518 if (XINT (length
) != size_in_chars
* BOOL_VECTOR_BITS_PER_CHAR
)
2519 XBOOL_VECTOR (val
)->data
[size_in_chars
- 1]
2520 &= (1 << (XINT (length
) % BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2523 invalid_syntax ("#&...");
2527 /* Accept compiled functions at read-time so that we don't have to
2528 build them using function calls. */
2530 tmp
= read_vector (readcharfun
, 1);
2531 return Fmake_byte_code (ASIZE (tmp
),
2532 XVECTOR (tmp
)->contents
);
2537 struct gcpro gcpro1
;
2540 /* Read the string itself. */
2541 tmp
= read1 (readcharfun
, &ch
, 0);
2542 if (ch
!= 0 || !STRINGP (tmp
))
2543 invalid_syntax ("#");
2545 /* Read the intervals and their properties. */
2548 Lisp_Object beg
, end
, plist
;
2550 beg
= read1 (readcharfun
, &ch
, 0);
2555 end
= read1 (readcharfun
, &ch
, 0);
2557 plist
= read1 (readcharfun
, &ch
, 0);
2559 invalid_syntax ("Invalid string property list");
2560 Fset_text_properties (beg
, end
, plist
, tmp
);
2566 /* #@NUMBER is used to skip NUMBER following characters.
2567 That's used in .elc files to skip over doc strings
2568 and function definitions. */
2571 enum { extra
= 100 };
2572 ptrdiff_t i
, nskip
= 0;
2575 /* Read a decimal integer. */
2576 while ((c
= READCHAR
) >= 0
2577 && c
>= '0' && c
<= '9')
2579 if ((STRING_BYTES_BOUND
- extra
) / 10 <= nskip
)
2587 if (load_force_doc_strings
2588 && (EQ (readcharfun
, Qget_file_char
)
2589 || EQ (readcharfun
, Qget_emacs_mule_file_char
)))
2591 /* If we are supposed to force doc strings into core right now,
2592 record the last string that we skipped,
2593 and record where in the file it comes from. */
2595 /* But first exchange saved_doc_string
2596 with prev_saved_doc_string, so we save two strings. */
2598 char *temp
= saved_doc_string
;
2599 ptrdiff_t temp_size
= saved_doc_string_size
;
2600 file_offset temp_pos
= saved_doc_string_position
;
2601 ptrdiff_t temp_len
= saved_doc_string_length
;
2603 saved_doc_string
= prev_saved_doc_string
;
2604 saved_doc_string_size
= prev_saved_doc_string_size
;
2605 saved_doc_string_position
= prev_saved_doc_string_position
;
2606 saved_doc_string_length
= prev_saved_doc_string_length
;
2608 prev_saved_doc_string
= temp
;
2609 prev_saved_doc_string_size
= temp_size
;
2610 prev_saved_doc_string_position
= temp_pos
;
2611 prev_saved_doc_string_length
= temp_len
;
2614 if (saved_doc_string_size
== 0)
2616 saved_doc_string_size
= nskip
+ extra
;
2617 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
2619 if (nskip
> saved_doc_string_size
)
2621 saved_doc_string_size
= nskip
+ extra
;
2622 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
2623 saved_doc_string_size
);
2626 saved_doc_string_position
= file_tell (instream
);
2628 /* Copy that many characters into saved_doc_string. */
2629 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2630 saved_doc_string
[i
] = c
= READCHAR
;
2632 saved_doc_string_length
= i
;
2636 /* Skip that many characters. */
2637 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2646 /* #! appears at the beginning of an executable file.
2647 Skip the first line. */
2648 while (c
!= '\n' && c
>= 0)
2653 return Vload_file_name
;
2655 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
2656 /* #:foo is the uninterned symbol named foo. */
2659 uninterned_symbol
= 1;
2663 /* Reader forms that can reuse previously read objects. */
2664 if (c
>= '0' && c
<= '9')
2669 /* Read a non-negative integer. */
2670 while (c
>= '0' && c
<= '9')
2676 /* #n=object returns object, but associates it with n for #n#. */
2677 if (c
== '=' && !NILP (Vread_circle
))
2679 /* Make a placeholder for #n# to use temporarily */
2680 Lisp_Object placeholder
;
2683 placeholder
= Fcons (Qnil
, Qnil
);
2684 cell
= Fcons (make_number (n
), placeholder
);
2685 read_objects
= Fcons (cell
, read_objects
);
2687 /* Read the object itself. */
2688 tem
= read0 (readcharfun
);
2690 /* Now put it everywhere the placeholder was... */
2691 substitute_object_in_subtree (tem
, placeholder
);
2693 /* ...and #n# will use the real value from now on. */
2694 Fsetcdr (cell
, tem
);
2698 /* #n# returns a previously read object. */
2699 if (c
== '#' && !NILP (Vread_circle
))
2701 tem
= Fassq (make_number (n
), read_objects
);
2704 /* Fall through to error message. */
2706 else if (c
== 'r' || c
== 'R')
2707 return read_integer (readcharfun
, n
);
2709 /* Fall through to error message. */
2711 else if (c
== 'x' || c
== 'X')
2712 return read_integer (readcharfun
, 16);
2713 else if (c
== 'o' || c
== 'O')
2714 return read_integer (readcharfun
, 8);
2715 else if (c
== 'b' || c
== 'B')
2716 return read_integer (readcharfun
, 2);
2719 invalid_syntax ("#");
2722 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2727 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
2732 int next_char
= READCHAR
;
2734 /* Transition from old-style to new-style:
2735 If we see "(`" it used to mean old-style, which usually works
2736 fine because ` should almost never appear in such a position
2737 for new-style. But occasionally we need "(`" to mean new
2738 style, so we try to distinguish the two by the fact that we
2739 can either write "( `foo" or "(` foo", where the first
2740 intends to use new-style whereas the second intends to use
2741 old-style. For Emacs-25, we should completely remove this
2742 first_in_list exception (old-style can still be obtained via
2744 if (!new_backquote_flag
&& first_in_list
&& next_char
== ' ')
2746 Vold_style_backquotes
= Qt
;
2753 new_backquote_flag
++;
2754 value
= read0 (readcharfun
);
2755 new_backquote_flag
--;
2757 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
2762 int next_char
= READCHAR
;
2764 /* Transition from old-style to new-style:
2765 It used to be impossible to have a new-style , other than within
2766 a new-style `. This is sufficient when ` and , are used in the
2767 normal way, but ` and , can also appear in args to macros that
2768 will not interpret them in the usual way, in which case , may be
2769 used without any ` anywhere near.
2770 So we now use the same heuristic as for backquote: old-style
2771 unquotes are only recognized when first on a list, and when
2772 followed by a space.
2773 Because it's more difficult to peak 2 chars ahead, a new-style
2774 ,@ can still not be used outside of a `, unless it's in the middle
2776 if (new_backquote_flag
2778 || (next_char
!= ' ' && next_char
!= '@'))
2780 Lisp_Object comma_type
= Qnil
;
2785 comma_type
= Qcomma_at
;
2787 comma_type
= Qcomma_dot
;
2790 if (ch
>= 0) UNREAD (ch
);
2791 comma_type
= Qcomma
;
2794 value
= read0 (readcharfun
);
2795 return Fcons (comma_type
, Fcons (value
, Qnil
));
2799 Vold_style_backquotes
= Qt
;
2811 end_of_file_error ();
2813 /* Accept `single space' syntax like (list ? x) where the
2814 whitespace character is SPC or TAB.
2815 Other literal whitespace like NL, CR, and FF are not accepted,
2816 as there are well-established escape sequences for these. */
2817 if (c
== ' ' || c
== '\t')
2818 return make_number (c
);
2821 c
= read_escape (readcharfun
, 0);
2822 modifiers
= c
& CHAR_MODIFIER_MASK
;
2823 c
&= ~CHAR_MODIFIER_MASK
;
2824 if (CHAR_BYTE8_P (c
))
2825 c
= CHAR_TO_BYTE8 (c
);
2828 next_char
= READCHAR
;
2829 ok
= (next_char
<= 040
2830 || (next_char
< 0200
2831 && (strchr ("\"';()[]#?`,.", next_char
))));
2834 return make_number (c
);
2836 invalid_syntax ("?");
2841 char *p
= read_buffer
;
2842 char *end
= read_buffer
+ read_buffer_size
;
2844 /* Nonzero if we saw an escape sequence specifying
2845 a multibyte character. */
2846 int force_multibyte
= 0;
2847 /* Nonzero if we saw an escape sequence specifying
2848 a single-byte character. */
2849 int force_singlebyte
= 0;
2853 while ((ch
= READCHAR
) >= 0
2856 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2858 int offset
= p
- read_buffer
;
2859 read_buffer
= (char *) xrealloc (read_buffer
,
2860 read_buffer_size
*= 2);
2861 p
= read_buffer
+ offset
;
2862 end
= read_buffer
+ read_buffer_size
;
2869 ch
= read_escape (readcharfun
, 1);
2871 /* CH is -1 if \ newline has just been seen */
2874 if (p
== read_buffer
)
2879 modifiers
= ch
& CHAR_MODIFIER_MASK
;
2880 ch
= ch
& ~CHAR_MODIFIER_MASK
;
2882 if (CHAR_BYTE8_P (ch
))
2883 force_singlebyte
= 1;
2884 else if (! ASCII_CHAR_P (ch
))
2885 force_multibyte
= 1;
2886 else /* i.e. ASCII_CHAR_P (ch) */
2888 /* Allow `\C- ' and `\C-?'. */
2889 if (modifiers
== CHAR_CTL
)
2892 ch
= 0, modifiers
= 0;
2894 ch
= 127, modifiers
= 0;
2896 if (modifiers
& CHAR_SHIFT
)
2898 /* Shift modifier is valid only with [A-Za-z]. */
2899 if (ch
>= 'A' && ch
<= 'Z')
2900 modifiers
&= ~CHAR_SHIFT
;
2901 else if (ch
>= 'a' && ch
<= 'z')
2902 ch
-= ('a' - 'A'), modifiers
&= ~CHAR_SHIFT
;
2905 if (modifiers
& CHAR_META
)
2907 /* Move the meta bit to the right place for a
2909 modifiers
&= ~CHAR_META
;
2910 ch
= BYTE8_TO_CHAR (ch
| 0x80);
2911 force_singlebyte
= 1;
2915 /* Any modifiers remaining are invalid. */
2917 error ("Invalid modifier in string");
2918 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
2922 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
2923 if (CHAR_BYTE8_P (ch
))
2924 force_singlebyte
= 1;
2925 else if (! ASCII_CHAR_P (ch
))
2926 force_multibyte
= 1;
2932 end_of_file_error ();
2934 /* If purifying, and string starts with \ newline,
2935 return zero instead. This is for doc strings
2936 that we are really going to find in etc/DOC.nn.nn */
2937 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
2938 return make_number (0);
2940 if (force_multibyte
)
2941 /* READ_BUFFER already contains valid multibyte forms. */
2943 else if (force_singlebyte
)
2945 nchars
= str_as_unibyte ((unsigned char *) read_buffer
,
2947 p
= read_buffer
+ nchars
;
2951 /* Otherwise, READ_BUFFER contains only ASCII. */
2954 /* We want readchar_count to be the number of characters, not
2955 bytes. Hence we adjust for multibyte characters in the
2956 string. ... But it doesn't seem to be necessary, because
2957 READCHAR *does* read multibyte characters from buffers. */
2958 /* readchar_count -= (p - read_buffer) - nchars; */
2960 return make_pure_string (read_buffer
, nchars
, p
- read_buffer
,
2962 || (p
- read_buffer
!= nchars
)));
2963 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
2965 || (p
- read_buffer
!= nchars
)));
2970 int next_char
= READCHAR
;
2973 if (next_char
<= 040
2974 || (next_char
< 0200
2975 && (strchr ("\"';([#?`,", next_char
))))
2981 /* Otherwise, we fall through! Note that the atom-reading loop
2982 below will now loop at least once, assuring that we will not
2983 try to UNREAD two characters in a row. */
2987 if (c
<= 040) goto retry
;
2988 if (c
== 0x8a0) /* NBSP */
2991 char *p
= read_buffer
;
2995 char *end
= read_buffer
+ read_buffer_size
;
2999 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
3001 int offset
= p
- read_buffer
;
3002 read_buffer
= (char *) xrealloc (read_buffer
,
3003 read_buffer_size
*= 2);
3004 p
= read_buffer
+ offset
;
3005 end
= read_buffer
+ read_buffer_size
;
3012 end_of_file_error ();
3017 p
+= CHAR_STRING (c
, (unsigned char *) p
);
3022 && c
!= 0x8a0 /* NBSP */
3024 || !(strchr ("\"';()[]#`,", c
))));
3028 int offset
= p
- read_buffer
;
3029 read_buffer
= (char *) xrealloc (read_buffer
,
3030 read_buffer_size
*= 2);
3031 p
= read_buffer
+ offset
;
3032 end
= read_buffer
+ read_buffer_size
;
3039 if (!quoted
&& !uninterned_symbol
)
3041 Lisp_Object result
= string_to_number (read_buffer
, 10, 0);
3042 if (! NILP (result
))
3046 Lisp_Object name
, result
;
3047 EMACS_INT nbytes
= p
- read_buffer
;
3050 ? multibyte_chars_in_text ((unsigned char *) read_buffer
,
3054 if (uninterned_symbol
&& ! NILP (Vpurify_flag
))
3055 name
= make_pure_string (read_buffer
, nchars
, nbytes
, multibyte
);
3057 name
= make_specified_string (read_buffer
, nchars
, nbytes
,multibyte
);
3058 result
= (uninterned_symbol
? Fmake_symbol (name
)
3059 : Fintern (name
, Qnil
));
3061 if (EQ (Vread_with_symbol_positions
, Qt
)
3062 || EQ (Vread_with_symbol_positions
, readcharfun
))
3063 Vread_symbol_positions_list
=
3064 /* Kind of a hack; this will probably fail if characters
3065 in the symbol name were escaped. Not really a big
3067 Fcons (Fcons (result
,
3068 make_number (readchar_count
3069 - XFASTINT (Flength (Fsymbol_name (result
))))),
3070 Vread_symbol_positions_list
);
3078 /* List of nodes we've seen during substitute_object_in_subtree. */
3079 static Lisp_Object seen_list
;
3082 substitute_object_in_subtree (Lisp_Object object
, Lisp_Object placeholder
)
3084 Lisp_Object check_object
;
3086 /* We haven't seen any objects when we start. */
3089 /* Make all the substitutions. */
3091 = substitute_object_recurse (object
, placeholder
, object
);
3093 /* Clear seen_list because we're done with it. */
3096 /* The returned object here is expected to always eq the
3098 if (!EQ (check_object
, object
))
3099 error ("Unexpected mutation error in reader");
3102 /* Feval doesn't get called from here, so no gc protection is needed. */
3103 #define SUBSTITUTE(get_val, set_val) \
3105 Lisp_Object old_value = get_val; \
3106 Lisp_Object true_value \
3107 = substitute_object_recurse (object, placeholder, \
3110 if (!EQ (old_value, true_value)) \
3117 substitute_object_recurse (Lisp_Object object
, Lisp_Object placeholder
, Lisp_Object subtree
)
3119 /* If we find the placeholder, return the target object. */
3120 if (EQ (placeholder
, subtree
))
3123 /* If we've been to this node before, don't explore it again. */
3124 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
3127 /* If this node can be the entry point to a cycle, remember that
3128 we've seen it. It can only be such an entry point if it was made
3129 by #n=, which means that we can find it as a value in
3131 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
3132 seen_list
= Fcons (subtree
, seen_list
);
3134 /* Recurse according to subtree's type.
3135 Every branch must return a Lisp_Object. */
3136 switch (XTYPE (subtree
))
3138 case Lisp_Vectorlike
:
3141 if (BOOL_VECTOR_P (subtree
))
3142 return subtree
; /* No sub-objects anyway. */
3143 else if (CHAR_TABLE_P (subtree
) || SUB_CHAR_TABLE_P (subtree
)
3144 || COMPILEDP (subtree
))
3145 length
= ASIZE (subtree
) & PSEUDOVECTOR_SIZE_MASK
;
3146 else if (VECTORP (subtree
))
3147 length
= ASIZE (subtree
);
3149 /* An unknown pseudovector may contain non-Lisp fields, so we
3150 can't just blindly traverse all its fields. We used to call
3151 `Flength' which signaled `sequencep', so I just preserved this
3153 wrong_type_argument (Qsequencep
, subtree
);
3155 for (i
= 0; i
< length
; i
++)
3156 SUBSTITUTE (AREF (subtree
, i
),
3157 ASET (subtree
, i
, true_value
));
3163 SUBSTITUTE (XCAR (subtree
),
3164 XSETCAR (subtree
, true_value
));
3165 SUBSTITUTE (XCDR (subtree
),
3166 XSETCDR (subtree
, true_value
));
3172 /* Check for text properties in each interval.
3173 substitute_in_interval contains part of the logic. */
3175 INTERVAL root_interval
= STRING_INTERVALS (subtree
);
3176 Lisp_Object arg
= Fcons (object
, placeholder
);
3178 traverse_intervals_noorder (root_interval
,
3179 &substitute_in_interval
, arg
);
3184 /* Other types don't recurse any further. */
3190 /* Helper function for substitute_object_recurse. */
3192 substitute_in_interval (INTERVAL interval
, Lisp_Object arg
)
3194 Lisp_Object object
= Fcar (arg
);
3195 Lisp_Object placeholder
= Fcdr (arg
);
3197 SUBSTITUTE (interval
->plist
, interval
->plist
= true_value
);
3207 /* Convert STRING to a number, assuming base BASE. Return a fixnum if CP has
3208 integer syntax and fits in a fixnum, else return the nearest float if CP has
3209 either floating point or integer syntax and BASE is 10, else return nil. If
3210 IGNORE_TRAILING is nonzero, consider just the longest prefix of CP that has
3211 valid floating point syntax. Signal an overflow if BASE is not 10 and the
3212 number has integer syntax but does not fit. */
3215 string_to_number (char const *string
, int base
, int ignore_trailing
)
3218 char const *cp
= string
;
3220 int float_syntax
= 0;
3223 /* Compute NaN and infinities using a variable, to cope with compilers that
3224 think they are smarter than we are. */
3227 /* Negate the value ourselves. This treats 0, NaNs, and infinity properly on
3228 IEEE floating point hosts, and works around a formerly-common bug where
3229 atof ("-0.0") drops the sign. */
3230 int negative
= *cp
== '-';
3232 int signedp
= negative
|| *cp
== '+';
3237 leading_digit
= digit_to_number (*cp
, base
);
3238 if (0 <= leading_digit
)
3243 while (0 <= digit_to_number (*cp
, base
));
3253 if ('0' <= *cp
&& *cp
<= '9')
3258 while ('0' <= *cp
&& *cp
<= '9');
3260 if (*cp
== 'e' || *cp
== 'E')
3262 char const *ecp
= cp
;
3264 if (*cp
== '+' || *cp
== '-')
3266 if ('0' <= *cp
&& *cp
<= '9')
3271 while ('0' <= *cp
&& *cp
<= '9');
3273 else if (cp
[-1] == '+'
3274 && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
3280 else if (cp
[-1] == '+'
3281 && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
3285 value
= zero
/ zero
;
3287 /* If that made a "negative" NaN, negate it. */
3290 union { double d
; char c
[sizeof (double)]; }
3291 u_data
, u_minus_zero
;
3293 u_minus_zero
.d
= -0.0;
3294 for (i
= 0; i
< sizeof (double); i
++)
3295 if (u_data
.c
[i
] & u_minus_zero
.c
[i
])
3301 /* Now VALUE is a positive NaN. */
3307 float_syntax
= ((state
& (DOT_CHAR
|TRAIL_INT
)) == (DOT_CHAR
|TRAIL_INT
)
3308 || state
== (LEAD_INT
|E_EXP
));
3311 /* Return nil if the number uses invalid syntax. If IGNORE_TRAILING, accept
3312 any prefix that matches. Otherwise, the entire string must match. */
3313 if (! (ignore_trailing
3314 ? ((state
& LEAD_INT
) != 0 || float_syntax
)
3315 : (!*cp
&& ((state
& ~DOT_CHAR
) == LEAD_INT
|| float_syntax
))))
3318 /* If the number uses integer and not float syntax, and is in C-language
3319 range, use its value, preferably as a fixnum. */
3320 if (0 <= leading_digit
&& ! float_syntax
)
3324 /* Fast special case for single-digit integers. This also avoids a
3325 glitch when BASE is 16 and IGNORE_TRAILING is nonzero, because in that
3326 case some versions of strtoumax accept numbers like "0x1" that Emacs
3328 if (digit_to_number (string
[signedp
+ 1], base
) < 0)
3329 return make_number (negative
? -leading_digit
: leading_digit
);
3332 n
= strtoumax (string
+ signedp
, NULL
, base
);
3333 if (errno
== ERANGE
)
3335 /* Unfortunately there's no simple and accurate way to convert
3336 non-base-10 numbers that are out of C-language range. */
3338 xsignal1 (Qoverflow_error
, build_string (string
));
3340 else if (n
<= (negative
? -MOST_NEGATIVE_FIXNUM
: MOST_POSITIVE_FIXNUM
))
3342 EMACS_INT signed_n
= n
;
3343 return make_number (negative
? -signed_n
: signed_n
);
3349 /* Either the number uses float syntax, or it does not fit into a fixnum.
3350 Convert it from string to floating point, unless the value is already
3351 known because it is an infinity, a NAN, or its absolute value fits in
3354 value
= atof (string
+ signedp
);
3356 return make_float (negative
? -value
: value
);
3361 read_vector (Lisp_Object readcharfun
, int bytecodeflag
)
3365 register Lisp_Object
*ptr
;
3366 register Lisp_Object tem
, item
, vector
;
3367 register struct Lisp_Cons
*otem
;
3370 tem
= read_list (1, readcharfun
);
3371 len
= Flength (tem
);
3372 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
3374 size
= ASIZE (vector
);
3375 ptr
= XVECTOR (vector
)->contents
;
3376 for (i
= 0; i
< size
; i
++)
3379 /* If `load-force-doc-strings' is t when reading a lazily-loaded
3380 bytecode object, the docstring containing the bytecode and
3381 constants values must be treated as unibyte and passed to
3382 Fread, to get the actual bytecode string and constants vector. */
3383 if (bytecodeflag
&& load_force_doc_strings
)
3385 if (i
== COMPILED_BYTECODE
)
3387 if (!STRINGP (item
))
3388 error ("Invalid byte code");
3390 /* Delay handling the bytecode slot until we know whether
3391 it is lazily-loaded (we can tell by whether the
3392 constants slot is nil). */
3393 ptr
[COMPILED_CONSTANTS
] = item
;
3396 else if (i
== COMPILED_CONSTANTS
)
3398 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
3402 /* Coerce string to unibyte (like string-as-unibyte,
3403 but without generating extra garbage and
3404 guaranteeing no change in the contents). */
3405 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
3406 STRING_SET_UNIBYTE (bytestr
);
3408 item
= Fread (Fcons (bytestr
, readcharfun
));
3410 error ("Invalid byte code");
3412 otem
= XCONS (item
);
3413 bytestr
= XCAR (item
);
3418 /* Now handle the bytecode slot. */
3419 ptr
[COMPILED_BYTECODE
] = read_pure
? Fpurecopy (bytestr
) : bytestr
;
3421 else if (i
== COMPILED_DOC_STRING
3423 && ! STRING_MULTIBYTE (item
))
3425 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
3426 item
= Fdecode_coding_string (item
, Qemacs_mule
, Qnil
, Qnil
);
3428 item
= Fstring_as_multibyte (item
);
3431 ptr
[i
] = read_pure
? Fpurecopy (item
) : item
;
3439 /* FLAG = 1 means check for ] to terminate rather than ) and .
3440 FLAG = -1 means check for starting with defun
3441 and make structure pure. */
3444 read_list (int flag
, register Lisp_Object readcharfun
)
3446 /* -1 means check next element for defun,
3447 0 means don't check,
3448 1 means already checked and found defun. */
3449 int defunflag
= flag
< 0 ? -1 : 0;
3450 Lisp_Object val
, tail
;
3451 register Lisp_Object elt
, tem
;
3452 struct gcpro gcpro1
, gcpro2
;
3453 /* 0 is the normal case.
3454 1 means this list is a doc reference; replace it with the number 0.
3455 2 means this list is a doc reference; replace it with the doc string. */
3456 int doc_reference
= 0;
3458 /* Initialize this to 1 if we are reading a list. */
3459 int first_in_list
= flag
<= 0;
3468 elt
= read1 (readcharfun
, &ch
, first_in_list
);
3473 /* While building, if the list starts with #$, treat it specially. */
3474 if (EQ (elt
, Vload_file_name
)
3476 && !NILP (Vpurify_flag
))
3478 if (NILP (Vdoc_file_name
))
3479 /* We have not yet called Snarf-documentation, so assume
3480 this file is described in the DOC-MM.NN file
3481 and Snarf-documentation will fill in the right value later.
3482 For now, replace the whole list with 0. */
3485 /* We have already called Snarf-documentation, so make a relative
3486 file name for this file, so it can be found properly
3487 in the installed Lisp directory.
3488 We don't use Fexpand_file_name because that would make
3489 the directory absolute now. */
3490 elt
= concat2 (build_string ("../lisp/"),
3491 Ffile_name_nondirectory (elt
));
3493 else if (EQ (elt
, Vload_file_name
)
3495 && load_force_doc_strings
)
3504 invalid_syntax (") or . in a vector");
3512 XSETCDR (tail
, read0 (readcharfun
));
3514 val
= read0 (readcharfun
);
3515 read1 (readcharfun
, &ch
, 0);
3519 if (doc_reference
== 1)
3520 return make_number (0);
3521 if (doc_reference
== 2)
3523 /* Get a doc string from the file we are loading.
3524 If it's in saved_doc_string, get it from there.
3526 Here, we don't know if the string is a
3527 bytecode string or a doc string. As a
3528 bytecode string must be unibyte, we always
3529 return a unibyte string. If it is actually a
3530 doc string, caller must make it
3533 EMACS_INT pos
= XINT (XCDR (val
));
3534 /* Position is negative for user variables. */
3535 if (pos
< 0) pos
= -pos
;
3536 if (pos
>= saved_doc_string_position
3537 && pos
< (saved_doc_string_position
3538 + saved_doc_string_length
))
3540 int start
= pos
- saved_doc_string_position
;
3543 /* Process quoting with ^A,
3544 and find the end of the string,
3545 which is marked with ^_ (037). */
3546 for (from
= start
, to
= start
;
3547 saved_doc_string
[from
] != 037;)
3549 int c
= saved_doc_string
[from
++];
3552 c
= saved_doc_string
[from
++];
3554 saved_doc_string
[to
++] = c
;
3556 saved_doc_string
[to
++] = 0;
3558 saved_doc_string
[to
++] = 037;
3561 saved_doc_string
[to
++] = c
;
3564 return make_unibyte_string (saved_doc_string
+ start
,
3567 /* Look in prev_saved_doc_string the same way. */
3568 else if (pos
>= prev_saved_doc_string_position
3569 && pos
< (prev_saved_doc_string_position
3570 + prev_saved_doc_string_length
))
3572 int start
= pos
- prev_saved_doc_string_position
;
3575 /* Process quoting with ^A,
3576 and find the end of the string,
3577 which is marked with ^_ (037). */
3578 for (from
= start
, to
= start
;
3579 prev_saved_doc_string
[from
] != 037;)
3581 int c
= prev_saved_doc_string
[from
++];
3584 c
= prev_saved_doc_string
[from
++];
3586 prev_saved_doc_string
[to
++] = c
;
3588 prev_saved_doc_string
[to
++] = 0;
3590 prev_saved_doc_string
[to
++] = 037;
3593 prev_saved_doc_string
[to
++] = c
;
3596 return make_unibyte_string (prev_saved_doc_string
3601 return get_doc_string (val
, 1, 0);
3606 invalid_syntax (". in wrong context");
3608 invalid_syntax ("] in a list");
3610 tem
= (read_pure
&& flag
<= 0
3611 ? pure_cons (elt
, Qnil
)
3612 : Fcons (elt
, Qnil
));
3614 XSETCDR (tail
, tem
);
3619 defunflag
= EQ (elt
, Qdefun
);
3620 else if (defunflag
> 0)
3625 static Lisp_Object initial_obarray
;
3627 /* oblookup stores the bucket number here, for the sake of Funintern. */
3629 static size_t oblookup_last_bucket_number
;
3631 static size_t hash_string (const char *ptr
, size_t len
);
3633 /* Get an error if OBARRAY is not an obarray.
3634 If it is one, return it. */
3637 check_obarray (Lisp_Object obarray
)
3639 if (!VECTORP (obarray
) || ASIZE (obarray
) == 0)
3641 /* If Vobarray is now invalid, force it to be valid. */
3642 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3643 wrong_type_argument (Qvectorp
, obarray
);
3648 /* Intern the C string STR: return a symbol with that name,
3649 interned in the current obarray. */
3652 intern (const char *str
)
3655 ptrdiff_t len
= strlen (str
);
3656 Lisp_Object obarray
;
3659 if (!VECTORP (obarray
) || ASIZE (obarray
) == 0)
3660 obarray
= check_obarray (obarray
);
3661 tem
= oblookup (obarray
, str
, len
, len
);
3664 return Fintern (make_string (str
, len
), obarray
);
3668 intern_c_string (const char *str
)
3671 ptrdiff_t len
= strlen (str
);
3672 Lisp_Object obarray
;
3675 if (!VECTORP (obarray
) || ASIZE (obarray
) == 0)
3676 obarray
= check_obarray (obarray
);
3677 tem
= oblookup (obarray
, str
, len
, len
);
3681 if (NILP (Vpurify_flag
))
3682 /* Creating a non-pure string from a string literal not
3683 implemented yet. We could just use make_string here and live
3684 with the extra copy. */
3687 return Fintern (make_pure_c_string (str
), obarray
);
3690 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3691 doc
: /* Return the canonical symbol whose name is STRING.
3692 If there is none, one is created by this function and returned.
3693 A second optional argument specifies the obarray to use;
3694 it defaults to the value of `obarray'. */)
3695 (Lisp_Object string
, Lisp_Object obarray
)
3697 register Lisp_Object tem
, sym
, *ptr
;
3699 if (NILP (obarray
)) obarray
= Vobarray
;
3700 obarray
= check_obarray (obarray
);
3702 CHECK_STRING (string
);
3704 tem
= oblookup (obarray
, SSDATA (string
),
3707 if (!INTEGERP (tem
))
3710 if (!NILP (Vpurify_flag
))
3711 string
= Fpurecopy (string
);
3712 sym
= Fmake_symbol (string
);
3714 if (EQ (obarray
, initial_obarray
))
3715 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3717 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED
;
3719 if ((SREF (string
, 0) == ':')
3720 && EQ (obarray
, initial_obarray
))
3722 XSYMBOL (sym
)->constant
= 1;
3723 XSYMBOL (sym
)->redirect
= SYMBOL_PLAINVAL
;
3724 SET_SYMBOL_VAL (XSYMBOL (sym
), sym
);
3727 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
3729 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
3731 XSYMBOL (sym
)->next
= 0;
3736 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3737 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3738 NAME may be a string or a symbol. If it is a symbol, that exact
3739 symbol is searched for.
3740 A second optional argument specifies the obarray to use;
3741 it defaults to the value of `obarray'. */)
3742 (Lisp_Object name
, Lisp_Object obarray
)
3744 register Lisp_Object tem
, string
;
3746 if (NILP (obarray
)) obarray
= Vobarray
;
3747 obarray
= check_obarray (obarray
);
3749 if (!SYMBOLP (name
))
3751 CHECK_STRING (name
);
3755 string
= SYMBOL_NAME (name
);
3757 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3758 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3764 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3765 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3766 The value is t if a symbol was found and deleted, nil otherwise.
3767 NAME may be a string or a symbol. If it is a symbol, that symbol
3768 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3769 OBARRAY defaults to the value of the variable `obarray'. */)
3770 (Lisp_Object name
, Lisp_Object obarray
)
3772 register Lisp_Object string
, tem
;
3775 if (NILP (obarray
)) obarray
= Vobarray
;
3776 obarray
= check_obarray (obarray
);
3779 string
= SYMBOL_NAME (name
);
3782 CHECK_STRING (name
);
3786 tem
= oblookup (obarray
, SSDATA (string
),
3791 /* If arg was a symbol, don't delete anything but that symbol itself. */
3792 if (SYMBOLP (name
) && !EQ (name
, tem
))
3795 /* There are plenty of other symbols which will screw up the Emacs
3796 session if we unintern them, as well as even more ways to use
3797 `setq' or `fset' or whatnot to make the Emacs session
3798 unusable. Let's not go down this silly road. --Stef */
3799 /* if (EQ (tem, Qnil) || EQ (tem, Qt))
3800 error ("Attempt to unintern t or nil"); */
3802 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3804 hash
= oblookup_last_bucket_number
;
3806 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
3808 if (XSYMBOL (tem
)->next
)
3809 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
3811 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
3815 Lisp_Object tail
, following
;
3817 for (tail
= XVECTOR (obarray
)->contents
[hash
];
3818 XSYMBOL (tail
)->next
;
3821 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
3822 if (EQ (following
, tem
))
3824 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
3833 /* Return the symbol in OBARRAY whose names matches the string
3834 of SIZE characters (SIZE_BYTE bytes) at PTR.
3835 If there is no such symbol in OBARRAY, return nil.
3837 Also store the bucket number in oblookup_last_bucket_number. */
3840 oblookup (Lisp_Object obarray
, register const char *ptr
, EMACS_INT size
, EMACS_INT size_byte
)
3844 register Lisp_Object tail
;
3845 Lisp_Object bucket
, tem
;
3847 if (!VECTORP (obarray
)
3848 || (obsize
= ASIZE (obarray
)) == 0)
3850 obarray
= check_obarray (obarray
);
3851 obsize
= ASIZE (obarray
);
3853 /* This is sometimes needed in the middle of GC. */
3854 obsize
&= ~ARRAY_MARK_FLAG
;
3855 hash
= hash_string (ptr
, size_byte
) % obsize
;
3856 bucket
= XVECTOR (obarray
)->contents
[hash
];
3857 oblookup_last_bucket_number
= hash
;
3858 if (EQ (bucket
, make_number (0)))
3860 else if (!SYMBOLP (bucket
))
3861 error ("Bad data in guts of obarray"); /* Like CADR error message */
3863 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
3865 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
3866 && SCHARS (SYMBOL_NAME (tail
)) == size
3867 && !memcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
3869 else if (XSYMBOL (tail
)->next
== 0)
3872 XSETINT (tem
, hash
);
3877 hash_string (const char *ptr
, size_t len
)
3879 register const char *p
= ptr
;
3880 register const char *end
= p
+ len
;
3881 register unsigned char c
;
3882 register size_t hash
= 0;
3887 if (c
>= 0140) c
-= 40;
3888 hash
= (hash
<< 3) + (hash
>> (CHAR_BIT
* sizeof hash
- 4)) + c
;
3894 map_obarray (Lisp_Object obarray
, void (*fn
) (Lisp_Object
, Lisp_Object
), Lisp_Object arg
)
3897 register Lisp_Object tail
;
3898 CHECK_VECTOR (obarray
);
3899 for (i
= ASIZE (obarray
) - 1; i
>= 0; i
--)
3901 tail
= XVECTOR (obarray
)->contents
[i
];
3906 if (XSYMBOL (tail
)->next
== 0)
3908 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
3914 mapatoms_1 (Lisp_Object sym
, Lisp_Object function
)
3916 call1 (function
, sym
);
3919 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
3920 doc
: /* Call FUNCTION on every symbol in OBARRAY.
3921 OBARRAY defaults to the value of `obarray'. */)
3922 (Lisp_Object function
, Lisp_Object obarray
)
3924 if (NILP (obarray
)) obarray
= Vobarray
;
3925 obarray
= check_obarray (obarray
);
3927 map_obarray (obarray
, mapatoms_1
, function
);
3931 #define OBARRAY_SIZE 1511
3936 Lisp_Object oblength
;
3938 XSETFASTINT (oblength
, OBARRAY_SIZE
);
3940 Vobarray
= Fmake_vector (oblength
, make_number (0));
3941 initial_obarray
= Vobarray
;
3942 staticpro (&initial_obarray
);
3944 Qunbound
= Fmake_symbol (make_pure_c_string ("unbound"));
3945 /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the
3946 NILP (Vpurify_flag) check in intern_c_string. */
3947 Qnil
= make_number (-1); Vpurify_flag
= make_number (1);
3948 Qnil
= intern_c_string ("nil");
3950 /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil,
3951 so those two need to be fixed manally. */
3952 SET_SYMBOL_VAL (XSYMBOL (Qunbound
), Qunbound
);
3953 XSYMBOL (Qunbound
)->function
= Qunbound
;
3954 XSYMBOL (Qunbound
)->plist
= Qnil
;
3955 /* XSYMBOL (Qnil)->function = Qunbound; */
3956 SET_SYMBOL_VAL (XSYMBOL (Qnil
), Qnil
);
3957 XSYMBOL (Qnil
)->constant
= 1;
3958 XSYMBOL (Qnil
)->plist
= Qnil
;
3960 Qt
= intern_c_string ("t");
3961 SET_SYMBOL_VAL (XSYMBOL (Qt
), Qt
);
3962 XSYMBOL (Qt
)->constant
= 1;
3964 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
3967 Qvariable_documentation
= intern_c_string ("variable-documentation");
3968 staticpro (&Qvariable_documentation
);
3970 read_buffer_size
= 100 + MAX_MULTIBYTE_LENGTH
;
3971 read_buffer
= (char *) xmalloc (read_buffer_size
);
3975 defsubr (struct Lisp_Subr
*sname
)
3978 sym
= intern_c_string (sname
->symbol_name
);
3979 XSETTYPED_PVECTYPE (sname
, size
, PVEC_SUBR
);
3980 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3983 #ifdef NOTDEF /* use fset in subr.el now */
3985 defalias (sname
, string
)
3986 struct Lisp_Subr
*sname
;
3990 sym
= intern (string
);
3991 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3995 /* Define an "integer variable"; a symbol whose value is forwarded to a
3996 C variable of type int. Sample call (munged w "xx" to fool make-docfile):
3997 DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */
3999 defvar_int (struct Lisp_Intfwd
*i_fwd
,
4000 const char *namestring
, EMACS_INT
*address
)
4003 sym
= intern_c_string (namestring
);
4004 i_fwd
->type
= Lisp_Fwd_Int
;
4005 i_fwd
->intvar
= address
;
4006 XSYMBOL (sym
)->declared_special
= 1;
4007 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4008 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)i_fwd
);
4011 /* Similar but define a variable whose value is t if address contains 1,
4012 nil if address contains 0. */
4014 defvar_bool (struct Lisp_Boolfwd
*b_fwd
,
4015 const char *namestring
, int *address
)
4018 sym
= intern_c_string (namestring
);
4019 b_fwd
->type
= Lisp_Fwd_Bool
;
4020 b_fwd
->boolvar
= address
;
4021 XSYMBOL (sym
)->declared_special
= 1;
4022 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4023 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)b_fwd
);
4024 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
4027 /* Similar but define a variable whose value is the Lisp Object stored
4028 at address. Two versions: with and without gc-marking of the C
4029 variable. The nopro version is used when that variable will be
4030 gc-marked for some other reason, since marking the same slot twice
4031 can cause trouble with strings. */
4033 defvar_lisp_nopro (struct Lisp_Objfwd
*o_fwd
,
4034 const char *namestring
, Lisp_Object
*address
)
4037 sym
= intern_c_string (namestring
);
4038 o_fwd
->type
= Lisp_Fwd_Obj
;
4039 o_fwd
->objvar
= address
;
4040 XSYMBOL (sym
)->declared_special
= 1;
4041 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4042 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)o_fwd
);
4046 defvar_lisp (struct Lisp_Objfwd
*o_fwd
,
4047 const char *namestring
, Lisp_Object
*address
)
4049 defvar_lisp_nopro (o_fwd
, namestring
, address
);
4050 staticpro (address
);
4053 /* Similar but define a variable whose value is the Lisp Object stored
4054 at a particular offset in the current kboard object. */
4057 defvar_kboard (struct Lisp_Kboard_Objfwd
*ko_fwd
,
4058 const char *namestring
, int offset
)
4061 sym
= intern_c_string (namestring
);
4062 ko_fwd
->type
= Lisp_Fwd_Kboard_Obj
;
4063 ko_fwd
->offset
= offset
;
4064 XSYMBOL (sym
)->declared_special
= 1;
4065 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4066 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)ko_fwd
);
4069 /* Record the value of load-path used at the start of dumping
4070 so we can see if the site changed it later during dumping. */
4071 static Lisp_Object dump_path
;
4077 int turn_off_warning
= 0;
4079 /* Compute the default load-path. */
4081 normal
= PATH_LOADSEARCH
;
4082 Vload_path
= decode_env_path (0, normal
);
4084 if (NILP (Vpurify_flag
))
4085 normal
= PATH_LOADSEARCH
;
4087 normal
= PATH_DUMPLOADSEARCH
;
4089 /* In a dumped Emacs, we normally have to reset the value of
4090 Vload_path from PATH_LOADSEARCH, since the value that was dumped
4091 uses ../lisp, instead of the path of the installed elisp
4092 libraries. However, if it appears that Vload_path was changed
4093 from the default before dumping, don't override that value. */
4096 if (! NILP (Fequal (dump_path
, Vload_path
)))
4098 Vload_path
= decode_env_path (0, normal
);
4099 if (!NILP (Vinstallation_directory
))
4101 Lisp_Object tem
, tem1
, sitelisp
;
4103 /* Remove site-lisp dirs from path temporarily and store
4104 them in sitelisp, then conc them on at the end so
4105 they're always first in path. */
4109 tem
= Fcar (Vload_path
);
4110 tem1
= Fstring_match (build_string ("site-lisp"),
4114 Vload_path
= Fcdr (Vload_path
);
4115 sitelisp
= Fcons (tem
, sitelisp
);
4121 /* Add to the path the lisp subdir of the
4122 installation dir, if it exists. */
4123 tem
= Fexpand_file_name (build_string ("lisp"),
4124 Vinstallation_directory
);
4125 tem1
= Ffile_exists_p (tem
);
4128 if (NILP (Fmember (tem
, Vload_path
)))
4130 turn_off_warning
= 1;
4131 Vload_path
= Fcons (tem
, Vload_path
);
4135 /* That dir doesn't exist, so add the build-time
4136 Lisp dirs instead. */
4137 Vload_path
= nconc2 (Vload_path
, dump_path
);
4139 /* Add leim under the installation dir, if it exists. */
4140 tem
= Fexpand_file_name (build_string ("leim"),
4141 Vinstallation_directory
);
4142 tem1
= Ffile_exists_p (tem
);
4145 if (NILP (Fmember (tem
, Vload_path
)))
4146 Vload_path
= Fcons (tem
, Vload_path
);
4149 /* Add site-lisp under the installation dir, if it exists. */
4150 tem
= Fexpand_file_name (build_string ("site-lisp"),
4151 Vinstallation_directory
);
4152 tem1
= Ffile_exists_p (tem
);
4155 if (NILP (Fmember (tem
, Vload_path
)))
4156 Vload_path
= Fcons (tem
, Vload_path
);
4159 /* If Emacs was not built in the source directory,
4160 and it is run from where it was built, add to load-path
4161 the lisp, leim and site-lisp dirs under that directory. */
4163 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
4167 tem
= Fexpand_file_name (build_string ("src/Makefile"),
4168 Vinstallation_directory
);
4169 tem1
= Ffile_exists_p (tem
);
4171 /* Don't be fooled if they moved the entire source tree
4172 AFTER dumping Emacs. If the build directory is indeed
4173 different from the source dir, src/Makefile.in and
4174 src/Makefile will not be found together. */
4175 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
4176 Vinstallation_directory
);
4177 tem2
= Ffile_exists_p (tem
);
4178 if (!NILP (tem1
) && NILP (tem2
))
4180 tem
= Fexpand_file_name (build_string ("lisp"),
4183 if (NILP (Fmember (tem
, Vload_path
)))
4184 Vload_path
= Fcons (tem
, Vload_path
);
4186 tem
= Fexpand_file_name (build_string ("leim"),
4189 if (NILP (Fmember (tem
, Vload_path
)))
4190 Vload_path
= Fcons (tem
, Vload_path
);
4192 tem
= Fexpand_file_name (build_string ("site-lisp"),
4195 if (NILP (Fmember (tem
, Vload_path
)))
4196 Vload_path
= Fcons (tem
, Vload_path
);
4199 if (!NILP (sitelisp
) && !no_site_lisp
)
4200 Vload_path
= nconc2 (Fnreverse (sitelisp
), Vload_path
);
4206 /* NORMAL refers to the lisp dir in the source directory. */
4207 /* We used to add ../lisp at the front here, but
4208 that caused trouble because it was copied from dump_path
4209 into Vload_path, above, when Vinstallation_directory was non-nil.
4210 It should be unnecessary. */
4211 Vload_path
= decode_env_path (0, normal
);
4212 dump_path
= Vload_path
;
4216 #if (!(defined (WINDOWSNT) || (defined (HAVE_NS))))
4217 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
4218 almost never correct, thereby causing a warning to be printed out that
4219 confuses users. Since PATH_LOADSEARCH is always overridden by the
4220 EMACSLOADPATH environment variable below, disable the warning on NT. */
4222 /* Warn if dirs in the *standard* path don't exist. */
4223 if (!turn_off_warning
)
4225 Lisp_Object path_tail
;
4227 for (path_tail
= Vload_path
;
4229 path_tail
= XCDR (path_tail
))
4231 Lisp_Object dirfile
;
4232 dirfile
= Fcar (path_tail
);
4233 if (STRINGP (dirfile
))
4235 dirfile
= Fdirectory_file_name (dirfile
);
4236 if (access (SSDATA (dirfile
), 0) < 0)
4237 dir_warning ("Warning: Lisp directory `%s' does not exist.\n",
4242 #endif /* !(WINDOWSNT || HAVE_NS) */
4244 /* If the EMACSLOADPATH environment variable is set, use its value.
4245 This doesn't apply if we're dumping. */
4247 if (NILP (Vpurify_flag
)
4248 && egetenv ("EMACSLOADPATH"))
4250 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
4254 load_in_progress
= 0;
4255 Vload_file_name
= Qnil
;
4257 load_descriptor_list
= Qnil
;
4259 Vstandard_input
= Qt
;
4260 Vloads_in_progress
= Qnil
;
4263 /* Print a warning, using format string FORMAT, that directory DIRNAME
4264 does not exist. Print it on stderr and put it in *Messages*. */
4267 dir_warning (const char *format
, Lisp_Object dirname
)
4270 = (char *) alloca (SCHARS (dirname
) + strlen (format
) + 5);
4272 fprintf (stderr
, format
, SDATA (dirname
));
4273 sprintf (buffer
, format
, SDATA (dirname
));
4274 /* Don't log the warning before we've initialized!! */
4276 message_dolog (buffer
, strlen (buffer
), 0, STRING_MULTIBYTE (dirname
));
4280 syms_of_lread (void)
4283 defsubr (&Sread_from_string
);
4285 defsubr (&Sintern_soft
);
4286 defsubr (&Sunintern
);
4287 defsubr (&Sget_load_suffixes
);
4289 defsubr (&Seval_buffer
);
4290 defsubr (&Seval_region
);
4291 defsubr (&Sread_char
);
4292 defsubr (&Sread_char_exclusive
);
4293 defsubr (&Sread_event
);
4294 defsubr (&Sget_file_char
);
4295 defsubr (&Smapatoms
);
4296 defsubr (&Slocate_file_internal
);
4298 DEFVAR_LISP ("obarray", Vobarray
,
4299 doc
: /* Symbol table for use by `intern' and `read'.
4300 It is a vector whose length ought to be prime for best results.
4301 The vector's contents don't make sense if examined from Lisp programs;
4302 to find all the symbols in an obarray, use `mapatoms'. */);
4304 DEFVAR_LISP ("values", Vvalues
,
4305 doc
: /* List of values of all expressions which were read, evaluated and printed.
4306 Order is reverse chronological. */);
4308 DEFVAR_LISP ("standard-input", Vstandard_input
,
4309 doc
: /* Stream for read to get input from.
4310 See documentation of `read' for possible values. */);
4311 Vstandard_input
= Qt
;
4313 DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions
,
4314 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
4316 If this variable is a buffer, then only forms read from that buffer
4317 will be added to `read-symbol-positions-list'.
4318 If this variable is t, then all read forms will be added.
4319 The effect of all other values other than nil are not currently
4320 defined, although they may be in the future.
4322 The positions are relative to the last call to `read' or
4323 `read-from-string'. It is probably a bad idea to set this variable at
4324 the toplevel; bind it instead. */);
4325 Vread_with_symbol_positions
= Qnil
;
4327 DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list
,
4328 doc
: /* A list mapping read symbols to their positions.
4329 This variable is modified during calls to `read' or
4330 `read-from-string', but only when `read-with-symbol-positions' is
4333 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
4334 CHAR-POSITION is an integer giving the offset of that occurrence of the
4335 symbol from the position where `read' or `read-from-string' started.
4337 Note that a symbol will appear multiple times in this list, if it was
4338 read multiple times. The list is in the same order as the symbols
4340 Vread_symbol_positions_list
= Qnil
;
4342 DEFVAR_LISP ("read-circle", Vread_circle
,
4343 doc
: /* Non-nil means read recursive structures using #N= and #N# syntax. */);
4346 DEFVAR_LISP ("load-path", Vload_path
,
4347 doc
: /* *List of directories to search for files to load.
4348 Each element is a string (directory name) or nil (try default directory).
4349 Initialized based on EMACSLOADPATH environment variable, if any,
4350 otherwise to default specified by file `epaths.h' when Emacs was built. */);
4352 DEFVAR_LISP ("load-suffixes", Vload_suffixes
,
4353 doc
: /* List of suffixes for (compiled or source) Emacs Lisp files.
4354 This list should not include the empty string.
4355 `load' and related functions try to append these suffixes, in order,
4356 to the specified file name if a Lisp suffix is allowed or required. */);
4357 Vload_suffixes
= Fcons (make_pure_c_string (".elc"),
4358 Fcons (make_pure_c_string (".el"), Qnil
));
4359 DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes
,
4360 doc
: /* List of suffixes that indicate representations of \
4362 This list should normally start with the empty string.
4364 Enabling Auto Compression mode appends the suffixes in
4365 `jka-compr-load-suffixes' to this list and disabling Auto Compression
4366 mode removes them again. `load' and related functions use this list to
4367 determine whether they should look for compressed versions of a file
4368 and, if so, which suffixes they should try to append to the file name
4369 in order to do so. However, if you want to customize which suffixes
4370 the loading functions recognize as compression suffixes, you should
4371 customize `jka-compr-load-suffixes' rather than the present variable. */);
4372 Vload_file_rep_suffixes
= Fcons (empty_unibyte_string
, Qnil
);
4374 DEFVAR_BOOL ("load-in-progress", load_in_progress
,
4375 doc
: /* Non-nil if inside of `load'. */);
4376 Qload_in_progress
= intern_c_string ("load-in-progress");
4377 staticpro (&Qload_in_progress
);
4379 DEFVAR_LISP ("after-load-alist", Vafter_load_alist
,
4380 doc
: /* An alist of expressions to be evalled when particular files are loaded.
4381 Each element looks like (REGEXP-OR-FEATURE FORMS...).
4383 REGEXP-OR-FEATURE is either a regular expression to match file names, or
4384 a symbol \(a feature name).
4386 When `load' is run and the file-name argument matches an element's
4387 REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol
4388 REGEXP-OR-FEATURE, the FORMS in the element are executed.
4390 An error in FORMS does not undo the load, but does prevent execution of
4391 the rest of the FORMS. */);
4392 Vafter_load_alist
= Qnil
;
4394 DEFVAR_LISP ("load-history", Vload_history
,
4395 doc
: /* Alist mapping loaded file names to symbols and features.
4396 Each alist element should be a list (FILE-NAME ENTRIES...), where
4397 FILE-NAME is the name of a file that has been loaded into Emacs.
4398 The file name is absolute and true (i.e. it doesn't contain symlinks).
4399 As an exception, one of the alist elements may have FILE-NAME nil,
4400 for symbols and features not associated with any file.
4402 The remaining ENTRIES in the alist element describe the functions and
4403 variables defined in that file, the features provided, and the
4404 features required. Each entry has the form `(provide . FEATURE)',
4405 `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)',
4406 `(defface . SYMBOL)', or `(t . SYMBOL)'. In addition, an entry `(t
4407 . SYMBOL)' may precede an entry `(defun . FUNCTION)', and means that
4408 SYMBOL was an autoload before this file redefined it as a function.
4410 During preloading, the file name recorded is relative to the main Lisp
4411 directory. These file names are converted to absolute at startup. */);
4412 Vload_history
= Qnil
;
4414 DEFVAR_LISP ("load-file-name", Vload_file_name
,
4415 doc
: /* Full name of file being loaded by `load'. */);
4416 Vload_file_name
= Qnil
;
4418 DEFVAR_LISP ("user-init-file", Vuser_init_file
,
4419 doc
: /* File name, including directory, of user's initialization file.
4420 If the file loaded had extension `.elc', and the corresponding source file
4421 exists, this variable contains the name of source file, suitable for use
4422 by functions like `custom-save-all' which edit the init file.
4423 While Emacs loads and evaluates the init file, value is the real name
4424 of the file, regardless of whether or not it has the `.elc' extension. */);
4425 Vuser_init_file
= Qnil
;
4427 DEFVAR_LISP ("current-load-list", Vcurrent_load_list
,
4428 doc
: /* Used for internal purposes by `load'. */);
4429 Vcurrent_load_list
= Qnil
;
4431 DEFVAR_LISP ("load-read-function", Vload_read_function
,
4432 doc
: /* Function used by `load' and `eval-region' for reading expressions.
4433 The default is nil, which means use the function `read'. */);
4434 Vload_read_function
= Qnil
;
4436 DEFVAR_LISP ("load-source-file-function", Vload_source_file_function
,
4437 doc
: /* Function called in `load' for loading an Emacs Lisp source file.
4438 This function is for doing code conversion before reading the source file.
4439 If nil, loading is done without any code conversion.
4440 Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where
4441 FULLNAME is the full name of FILE.
4442 See `load' for the meaning of the remaining arguments. */);
4443 Vload_source_file_function
= Qnil
;
4445 DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings
,
4446 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
4447 This is useful when the file being loaded is a temporary copy. */);
4448 load_force_doc_strings
= 0;
4450 DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte
,
4451 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
4452 This is normally bound by `load' and `eval-buffer' to control `read',
4453 and is not meant for users to change. */);
4454 load_convert_to_unibyte
= 0;
4456 DEFVAR_LISP ("source-directory", Vsource_directory
,
4457 doc
: /* Directory in which Emacs sources were found when Emacs was built.
4458 You cannot count on them to still be there! */);
4460 = Fexpand_file_name (build_string ("../"),
4461 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
4463 DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list
,
4464 doc
: /* List of files that were preloaded (when dumping Emacs). */);
4465 Vpreloaded_file_list
= Qnil
;
4467 DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars
,
4468 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
4469 Vbyte_boolean_vars
= Qnil
;
4471 DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries
,
4472 doc
: /* Non-nil means load dangerous compiled Lisp files.
4473 Some versions of XEmacs use different byte codes than Emacs. These
4474 incompatible byte codes can make Emacs crash when it tries to execute
4476 load_dangerous_libraries
= 0;
4478 DEFVAR_BOOL ("force-load-messages", force_load_messages
,
4479 doc
: /* Non-nil means force printing messages when loading Lisp files.
4480 This overrides the value of the NOMESSAGE argument to `load'. */);
4481 force_load_messages
= 0;
4483 DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp
,
4484 doc
: /* Regular expression matching safe to load compiled Lisp files.
4485 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
4486 from the file, and matches them against this regular expression.
4487 When the regular expression matches, the file is considered to be safe
4488 to load. See also `load-dangerous-libraries'. */);
4489 Vbytecomp_version_regexp
4490 = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
4492 Qlexical_binding
= intern ("lexical-binding");
4493 staticpro (&Qlexical_binding
);
4494 DEFVAR_LISP ("lexical-binding", Vlexical_binding
,
4495 doc
: /* If non-nil, use lexical binding when evaluating code.
4496 This only applies to code evaluated by `eval-buffer' and `eval-region'.
4497 This variable is automatically set from the file variables of an interpreted
4498 Lisp file read using `load'. */);
4499 Fmake_variable_buffer_local (Qlexical_binding
);
4501 DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list
,
4502 doc
: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
4503 Veval_buffer_list
= Qnil
;
4505 DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes
,
4506 doc
: /* Set to non-nil when `read' encounters an old-style backquote. */);
4507 Vold_style_backquotes
= Qnil
;
4508 Qold_style_backquotes
= intern_c_string ("old-style-backquotes");
4509 staticpro (&Qold_style_backquotes
);
4511 /* Vsource_directory was initialized in init_lread. */
4513 load_descriptor_list
= Qnil
;
4514 staticpro (&load_descriptor_list
);
4516 Qcurrent_load_list
= intern_c_string ("current-load-list");
4517 staticpro (&Qcurrent_load_list
);
4519 Qstandard_input
= intern_c_string ("standard-input");
4520 staticpro (&Qstandard_input
);
4522 Qread_char
= intern_c_string ("read-char");
4523 staticpro (&Qread_char
);
4525 Qget_file_char
= intern_c_string ("get-file-char");
4526 staticpro (&Qget_file_char
);
4528 Qget_emacs_mule_file_char
= intern_c_string ("get-emacs-mule-file-char");
4529 staticpro (&Qget_emacs_mule_file_char
);
4531 Qload_force_doc_strings
= intern_c_string ("load-force-doc-strings");
4532 staticpro (&Qload_force_doc_strings
);
4534 Qbackquote
= intern_c_string ("`");
4535 staticpro (&Qbackquote
);
4536 Qcomma
= intern_c_string (",");
4537 staticpro (&Qcomma
);
4538 Qcomma_at
= intern_c_string (",@");
4539 staticpro (&Qcomma_at
);
4540 Qcomma_dot
= intern_c_string (",.");
4541 staticpro (&Qcomma_dot
);
4543 Qinhibit_file_name_operation
= intern_c_string ("inhibit-file-name-operation");
4544 staticpro (&Qinhibit_file_name_operation
);
4546 Qascii_character
= intern_c_string ("ascii-character");
4547 staticpro (&Qascii_character
);
4549 Qfunction
= intern_c_string ("function");
4550 staticpro (&Qfunction
);
4552 Qload
= intern_c_string ("load");
4555 Qload_file_name
= intern_c_string ("load-file-name");
4556 staticpro (&Qload_file_name
);
4558 Qeval_buffer_list
= intern_c_string ("eval-buffer-list");
4559 staticpro (&Qeval_buffer_list
);
4561 Qfile_truename
= intern_c_string ("file-truename");
4562 staticpro (&Qfile_truename
) ;
4564 Qdir_ok
= intern_c_string ("dir-ok");
4565 staticpro (&Qdir_ok
);
4567 Qdo_after_load_evaluation
= intern_c_string ("do-after-load-evaluation");
4568 staticpro (&Qdo_after_load_evaluation
) ;
4570 staticpro (&dump_path
);
4572 staticpro (&read_objects
);
4573 read_objects
= Qnil
;
4574 staticpro (&seen_list
);
4577 Vloads_in_progress
= Qnil
;
4578 staticpro (&Vloads_in_progress
);
4580 Qhash_table
= intern_c_string ("hash-table");
4581 staticpro (&Qhash_table
);
4582 Qdata
= intern_c_string ("data");
4584 Qtest
= intern_c_string ("test");
4586 Qsize
= intern_c_string ("size");
4588 Qweakness
= intern_c_string ("weakness");
4589 staticpro (&Qweakness
);
4590 Qrehash_size
= intern_c_string ("rehash-size");
4591 staticpro (&Qrehash_size
);
4592 Qrehash_threshold
= intern_c_string ("rehash-threshold");
4593 staticpro (&Qrehash_threshold
);