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>
29 #include "intervals.h"
31 #include "character.h"
38 #include "termhooks.h"
40 #include "blockinput.h"
51 #endif /* HAVE_SETLOCALE */
56 #define file_offset off_t
57 #define file_tell ftello
59 #define file_offset long
60 #define file_tell ftell
63 /* hash table read constants */
64 Lisp_Object Qhash_table
, Qdata
;
65 Lisp_Object Qtest
, Qsize
;
66 Lisp_Object Qweakness
;
67 Lisp_Object Qrehash_size
;
68 Lisp_Object Qrehash_threshold
;
70 Lisp_Object Qread_char
, Qget_file_char
, Qstandard_input
, Qcurrent_load_list
;
71 Lisp_Object Qvariable_documentation
;
72 Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
73 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
74 Lisp_Object Qinhibit_file_name_operation
;
75 Lisp_Object Qeval_buffer_list
;
76 Lisp_Object Qlexical_binding
;
77 Lisp_Object Qfile_truename
, Qdo_after_load_evaluation
; /* ACM 2006/5/16 */
79 /* Used instead of Qget_file_char while loading *.elc files compiled
80 by Emacs 21 or older. */
81 static Lisp_Object Qget_emacs_mule_file_char
;
83 static Lisp_Object Qload_force_doc_strings
;
85 extern Lisp_Object Qinternal_interpreter_environment
;
87 static Lisp_Object Qload_in_progress
;
89 /* The association list of objects read with the #n=object form.
90 Each member of the list has the form (n . object), and is used to
91 look up the object for the corresponding #n# construct.
92 It must be set to nil before all top-level calls to read0. */
93 Lisp_Object read_objects
;
95 /* Nonzero means READCHAR should read bytes one by one (not character)
96 when READCHARFUN is Qget_file_char or Qget_emacs_mule_file_char.
97 This is set to 1 by read1 temporarily while handling #@NUMBER. */
98 static int load_each_byte
;
100 /* List of descriptors now open for Fload. */
101 static Lisp_Object load_descriptor_list
;
103 /* File for get_file_char to read from. Use by load. */
104 static FILE *instream
;
106 /* When nonzero, read conses in pure space */
107 static int read_pure
;
109 /* For use within read-from-string (this reader is non-reentrant!!) */
110 static EMACS_INT read_from_string_index
;
111 static EMACS_INT read_from_string_index_byte
;
112 static EMACS_INT read_from_string_limit
;
114 /* Number of characters read in the current call to Fread or
115 Fread_from_string. */
116 static EMACS_INT readchar_count
;
118 /* This contains the last string skipped with #@. */
119 static char *saved_doc_string
;
120 /* Length of buffer allocated in saved_doc_string. */
121 static int saved_doc_string_size
;
122 /* Length of actual data in saved_doc_string. */
123 static int saved_doc_string_length
;
124 /* This is the file position that string came from. */
125 static file_offset saved_doc_string_position
;
127 /* This contains the previous string skipped with #@.
128 We copy it from saved_doc_string when a new string
129 is put in saved_doc_string. */
130 static char *prev_saved_doc_string
;
131 /* Length of buffer allocated in prev_saved_doc_string. */
132 static int prev_saved_doc_string_size
;
133 /* Length of actual data in prev_saved_doc_string. */
134 static int prev_saved_doc_string_length
;
135 /* This is the file position that string came from. */
136 static file_offset prev_saved_doc_string_position
;
138 /* Nonzero means inside a new-style backquote
139 with no surrounding parentheses.
140 Fread initializes this to zero, so we need not specbind it
141 or worry about what happens to it when there is an error. */
142 static int new_backquote_flag
;
143 static Lisp_Object Qold_style_backquotes
;
145 /* A list of file names for files being loaded in Fload. Used to
146 check for recursive loads. */
148 static Lisp_Object Vloads_in_progress
;
150 static int read_emacs_mule_char (int, int (*) (int, Lisp_Object
),
153 static void readevalloop (Lisp_Object
, FILE*, Lisp_Object
, int,
154 Lisp_Object
, Lisp_Object
,
155 Lisp_Object
, Lisp_Object
);
156 static Lisp_Object
load_unwind (Lisp_Object
);
157 static Lisp_Object
load_descriptor_unwind (Lisp_Object
);
159 static void invalid_syntax (const char *, int) NO_RETURN
;
160 static void end_of_file_error (void) NO_RETURN
;
163 /* Functions that read one byte from the current source READCHARFUN
164 or unreads one byte. If the integer argument C is -1, it returns
165 one read byte, or -1 when there's no more byte in the source. If C
166 is 0 or positive, it unreads C, and the return value is not
169 static int readbyte_for_lambda (int, Lisp_Object
);
170 static int readbyte_from_file (int, Lisp_Object
);
171 static int readbyte_from_string (int, Lisp_Object
);
173 /* Handle unreading and rereading of characters.
174 Write READCHAR to read a character,
175 UNREAD(c) to unread c to be read again.
177 These macros correctly read/unread multibyte characters. */
179 #define READCHAR readchar (readcharfun, NULL)
180 #define UNREAD(c) unreadchar (readcharfun, c)
182 /* Same as READCHAR but set *MULTIBYTE to the multibyteness of the source. */
183 #define READCHAR_REPORT_MULTIBYTE(multibyte) readchar (readcharfun, multibyte)
185 /* When READCHARFUN is Qget_file_char, Qget_emacs_mule_file_char,
186 Qlambda, or a cons, we use this to keep an unread character because
187 a file stream can't handle multibyte-char unreading. The value -1
188 means that there's no unread character. */
189 static int unread_char
;
192 readchar (Lisp_Object readcharfun
, int *multibyte
)
196 int (*readbyte
) (int, Lisp_Object
);
197 unsigned char buf
[MAX_MULTIBYTE_LENGTH
];
199 int emacs_mule_encoding
= 0;
206 if (BUFFERP (readcharfun
))
208 register struct buffer
*inbuffer
= XBUFFER (readcharfun
);
210 EMACS_INT pt_byte
= BUF_PT_BYTE (inbuffer
);
212 if (pt_byte
>= BUF_ZV_BYTE (inbuffer
))
215 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
217 /* Fetch the character code from the buffer. */
218 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, pt_byte
);
219 BUF_INC_POS (inbuffer
, pt_byte
);
226 c
= BUF_FETCH_BYTE (inbuffer
, pt_byte
);
227 if (! ASCII_BYTE_P (c
))
228 c
= BYTE8_TO_CHAR (c
);
231 SET_BUF_PT_BOTH (inbuffer
, BUF_PT (inbuffer
) + 1, pt_byte
);
235 if (MARKERP (readcharfun
))
237 register struct buffer
*inbuffer
= XMARKER (readcharfun
)->buffer
;
239 EMACS_INT bytepos
= marker_byte_position (readcharfun
);
241 if (bytepos
>= BUF_ZV_BYTE (inbuffer
))
244 if (! NILP (BVAR (inbuffer
, enable_multibyte_characters
)))
246 /* Fetch the character code from the buffer. */
247 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, bytepos
);
248 BUF_INC_POS (inbuffer
, bytepos
);
255 c
= BUF_FETCH_BYTE (inbuffer
, bytepos
);
256 if (! ASCII_BYTE_P (c
))
257 c
= BYTE8_TO_CHAR (c
);
261 XMARKER (readcharfun
)->bytepos
= bytepos
;
262 XMARKER (readcharfun
)->charpos
++;
267 if (EQ (readcharfun
, Qlambda
))
269 readbyte
= readbyte_for_lambda
;
273 if (EQ (readcharfun
, Qget_file_char
))
275 readbyte
= readbyte_from_file
;
279 if (STRINGP (readcharfun
))
281 if (read_from_string_index
>= read_from_string_limit
)
283 else if (STRING_MULTIBYTE (readcharfun
))
287 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c
, readcharfun
,
288 read_from_string_index
,
289 read_from_string_index_byte
);
293 c
= SREF (readcharfun
, read_from_string_index_byte
);
294 read_from_string_index
++;
295 read_from_string_index_byte
++;
300 if (CONSP (readcharfun
))
302 /* This is the case that read_vector is reading from a unibyte
303 string that contains a byte sequence previously skipped
304 because of #@NUMBER. The car part of readcharfun is that
305 string, and the cdr part is a value of readcharfun given to
307 readbyte
= readbyte_from_string
;
308 if (EQ (XCDR (readcharfun
), Qget_emacs_mule_file_char
))
309 emacs_mule_encoding
= 1;
313 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
315 readbyte
= readbyte_from_file
;
316 emacs_mule_encoding
= 1;
320 tem
= call0 (readcharfun
);
327 if (unread_char
>= 0)
333 c
= (*readbyte
) (-1, readcharfun
);
334 if (c
< 0 || load_each_byte
)
338 if (ASCII_BYTE_P (c
))
340 if (emacs_mule_encoding
)
341 return read_emacs_mule_char (c
, readbyte
, readcharfun
);
344 len
= BYTES_BY_CHAR_HEAD (c
);
347 c
= (*readbyte
) (-1, readcharfun
);
348 if (c
< 0 || ! TRAILING_CODE_P (c
))
351 (*readbyte
) (buf
[i
], readcharfun
);
352 return BYTE8_TO_CHAR (buf
[0]);
356 return STRING_CHAR (buf
);
359 /* Unread the character C in the way appropriate for the stream READCHARFUN.
360 If the stream is a user function, call it with the char as argument. */
363 unreadchar (Lisp_Object readcharfun
, int c
)
367 /* Don't back up the pointer if we're unreading the end-of-input mark,
368 since readchar didn't advance it when we read it. */
370 else if (BUFFERP (readcharfun
))
372 struct buffer
*b
= XBUFFER (readcharfun
);
373 EMACS_INT charpos
= BUF_PT (b
);
374 EMACS_INT bytepos
= BUF_PT_BYTE (b
);
376 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
377 BUF_DEC_POS (b
, bytepos
);
381 SET_BUF_PT_BOTH (b
, charpos
- 1, bytepos
);
383 else if (MARKERP (readcharfun
))
385 struct buffer
*b
= XMARKER (readcharfun
)->buffer
;
386 EMACS_INT bytepos
= XMARKER (readcharfun
)->bytepos
;
388 XMARKER (readcharfun
)->charpos
--;
389 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
390 BUF_DEC_POS (b
, bytepos
);
394 XMARKER (readcharfun
)->bytepos
= bytepos
;
396 else if (STRINGP (readcharfun
))
398 read_from_string_index
--;
399 read_from_string_index_byte
400 = string_char_to_byte (readcharfun
, read_from_string_index
);
402 else if (CONSP (readcharfun
))
406 else if (EQ (readcharfun
, Qlambda
))
410 else if (EQ (readcharfun
, Qget_file_char
)
411 || EQ (readcharfun
, Qget_emacs_mule_file_char
))
416 ungetc (c
, instream
);
423 call1 (readcharfun
, make_number (c
));
427 readbyte_for_lambda (int c
, Lisp_Object readcharfun
)
429 return read_bytecode_char (c
>= 0);
434 readbyte_from_file (int c
, Lisp_Object readcharfun
)
439 ungetc (c
, instream
);
448 /* Interrupted reads have been observed while reading over the network */
449 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
461 return (c
== EOF
? -1 : c
);
465 readbyte_from_string (int c
, Lisp_Object readcharfun
)
467 Lisp_Object string
= XCAR (readcharfun
);
471 read_from_string_index
--;
472 read_from_string_index_byte
473 = string_char_to_byte (string
, read_from_string_index
);
476 if (read_from_string_index
>= read_from_string_limit
)
479 FETCH_STRING_CHAR_ADVANCE (c
, string
,
480 read_from_string_index
,
481 read_from_string_index_byte
);
486 /* Read one non-ASCII character from INSTREAM. The character is
487 encoded in `emacs-mule' and the first byte is already read in
491 read_emacs_mule_char (int c
, int (*readbyte
) (int, Lisp_Object
), Lisp_Object readcharfun
)
493 /* Emacs-mule coding uses at most 4-byte for one character. */
494 unsigned char buf
[4];
495 int len
= emacs_mule_bytes
[c
];
496 struct charset
*charset
;
501 /* C is not a valid leading-code of `emacs-mule'. */
502 return BYTE8_TO_CHAR (c
);
508 c
= (*readbyte
) (-1, readcharfun
);
512 (*readbyte
) (buf
[i
], readcharfun
);
513 return BYTE8_TO_CHAR (buf
[0]);
520 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
521 code
= buf
[1] & 0x7F;
525 if (buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_11
526 || buf
[0] == EMACS_MULE_LEADING_CODE_PRIVATE_12
)
528 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
529 code
= buf
[2] & 0x7F;
533 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[0]]);
534 code
= ((buf
[1] << 8) | buf
[2]) & 0x7F7F;
539 charset
= CHARSET_FROM_ID (emacs_mule_charset
[buf
[1]]);
540 code
= ((buf
[2] << 8) | buf
[3]) & 0x7F7F;
542 c
= DECODE_CHAR (charset
, code
);
544 Fsignal (Qinvalid_read_syntax
,
545 Fcons (build_string ("invalid multibyte form"), Qnil
));
550 static Lisp_Object
read_internal_start (Lisp_Object
, Lisp_Object
,
552 static Lisp_Object
read0 (Lisp_Object
);
553 static Lisp_Object
read1 (Lisp_Object
, int *, int);
555 static Lisp_Object
read_list (int, Lisp_Object
);
556 static Lisp_Object
read_vector (Lisp_Object
, int);
558 static Lisp_Object
substitute_object_recurse (Lisp_Object
, Lisp_Object
,
560 static void substitute_object_in_subtree (Lisp_Object
,
562 static void substitute_in_interval (INTERVAL
, Lisp_Object
);
565 /* Get a character from the tty. */
567 /* Read input events until we get one that's acceptable for our purposes.
569 If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed
570 until we get a character we like, and then stuffed into
573 If ASCII_REQUIRED is non-zero, we check function key events to see
574 if the unmodified version of the symbol has a Qascii_character
575 property, and use that character, if present.
577 If ERROR_NONASCII is non-zero, we signal an error if the input we
578 get isn't an ASCII character with modifiers. If it's zero but
579 ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII
582 If INPUT_METHOD is nonzero, we invoke the current input method
583 if the character warrants that.
585 If SECONDS is a number, we wait that many seconds for input, and
586 return Qnil if no input arrives within that time. */
589 read_filtered_event (int no_switch_frame
, int ascii_required
,
590 int error_nonascii
, int input_method
, Lisp_Object seconds
)
592 Lisp_Object val
, delayed_switch_frame
;
595 #ifdef HAVE_WINDOW_SYSTEM
596 if (display_hourglass_p
)
600 delayed_switch_frame
= Qnil
;
602 /* Compute timeout. */
603 if (NUMBERP (seconds
))
605 EMACS_TIME wait_time
;
607 double duration
= extract_float (seconds
);
609 sec
= (int) duration
;
610 usec
= (duration
- sec
) * 1000000;
611 EMACS_GET_TIME (end_time
);
612 EMACS_SET_SECS_USECS (wait_time
, sec
, usec
);
613 EMACS_ADD_TIME (end_time
, end_time
, wait_time
);
616 /* Read until we get an acceptable event. */
619 val
= read_char (0, 0, 0, (input_method
? Qnil
: Qt
), 0,
620 NUMBERP (seconds
) ? &end_time
: NULL
);
621 while (INTEGERP (val
) && XINT (val
) == -2); /* wrong_kboard_jmpbuf */
626 /* switch-frame events are put off until after the next ASCII
627 character. This is better than signaling an error just because
628 the last characters were typed to a separate minibuffer frame,
629 for example. Eventually, some code which can deal with
630 switch-frame events will read it and process it. */
632 && EVENT_HAS_PARAMETERS (val
)
633 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (val
)), Qswitch_frame
))
635 delayed_switch_frame
= val
;
639 if (ascii_required
&& !(NUMBERP (seconds
) && NILP (val
)))
641 /* Convert certain symbols to their ASCII equivalents. */
644 Lisp_Object tem
, tem1
;
645 tem
= Fget (val
, Qevent_symbol_element_mask
);
648 tem1
= Fget (Fcar (tem
), Qascii_character
);
649 /* Merge this symbol's modifier bits
650 with the ASCII equivalent of its basic code. */
652 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
656 /* If we don't have a character now, deal with it appropriately. */
661 Vunread_command_events
= Fcons (val
, Qnil
);
662 error ("Non-character input-event");
669 if (! NILP (delayed_switch_frame
))
670 unread_switch_frame
= delayed_switch_frame
;
674 #ifdef HAVE_WINDOW_SYSTEM
675 if (display_hourglass_p
)
684 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 3, 0,
685 doc
: /* Read a character from the command input (keyboard or macro).
686 It is returned as a number.
687 If the character has modifiers, they are resolved and reflected to the
688 character code if possible (e.g. C-SPC -> 0).
690 If the user generates an event which is not a character (i.e. a mouse
691 click or function key event), `read-char' signals an error. As an
692 exception, switch-frame events are put off until non-character events
694 If you want to read non-character events, or ignore them, call
695 `read-event' or `read-char-exclusive' instead.
697 If the optional argument PROMPT is non-nil, display that as a prompt.
698 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
699 input method is turned on in the current buffer, that input method
700 is used for reading a character.
701 If the optional argument SECONDS is non-nil, it should be a number
702 specifying the maximum number of seconds to wait for input. If no
703 input arrives in that time, return nil. SECONDS may be a
704 floating-point value. */)
705 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
710 message_with_string ("%s", prompt
, 0);
711 val
= read_filtered_event (1, 1, 1, ! NILP (inherit_input_method
), seconds
);
713 return (NILP (val
) ? Qnil
714 : make_number (char_resolve_modifier_mask (XINT (val
))));
717 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 3, 0,
718 doc
: /* Read an event object from the input stream.
719 If the optional argument PROMPT is non-nil, display that as a prompt.
720 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
721 input method is turned on in the current buffer, that input method
722 is used for reading a character.
723 If the optional argument SECONDS is non-nil, it should be a number
724 specifying the maximum number of seconds to wait for input. If no
725 input arrives in that time, return nil. SECONDS may be a
726 floating-point value. */)
727 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
730 message_with_string ("%s", prompt
, 0);
731 return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method
), seconds
);
734 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 3, 0,
735 doc
: /* Read a character from the command input (keyboard or macro).
736 It is returned as a number. Non-character events are ignored.
737 If the character has modifiers, they are resolved and reflected to the
738 character code if possible (e.g. C-SPC -> 0).
740 If the optional argument PROMPT is non-nil, display that as a prompt.
741 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
742 input method is turned on in the current buffer, that input method
743 is used for reading a character.
744 If the optional argument SECONDS is non-nil, it should be a number
745 specifying the maximum number of seconds to wait for input. If no
746 input arrives in that time, return nil. SECONDS may be a
747 floating-point value. */)
748 (Lisp_Object prompt
, Lisp_Object inherit_input_method
, Lisp_Object seconds
)
753 message_with_string ("%s", prompt
, 0);
755 val
= read_filtered_event (1, 1, 0, ! NILP (inherit_input_method
), seconds
);
757 return (NILP (val
) ? Qnil
758 : make_number (char_resolve_modifier_mask (XINT (val
))));
761 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
762 doc
: /* Don't use this yourself. */)
765 register Lisp_Object val
;
767 XSETINT (val
, getc (instream
));
775 /* Return true if the lisp code read using READCHARFUN defines a non-nil
776 `lexical-binding' file variable. After returning, the stream is
777 positioned following the first line, if it is a comment, otherwise
781 lisp_file_lexically_bound_p (Lisp_Object readcharfun
)
785 /* The first line isn't a comment, just give up. */
791 /* Look for an appropriate file-variable in the first line. */
795 NOMINAL
, AFTER_FIRST_DASH
, AFTER_ASTERIX
,
796 } beg_end_state
= NOMINAL
;
797 int in_file_vars
= 0;
799 #define UPDATE_BEG_END_STATE(ch) \
800 if (beg_end_state == NOMINAL) \
801 beg_end_state = (ch == '-' ? AFTER_FIRST_DASH : NOMINAL); \
802 else if (beg_end_state == AFTER_FIRST_DASH) \
803 beg_end_state = (ch == '*' ? AFTER_ASTERIX : NOMINAL); \
804 else if (beg_end_state == AFTER_ASTERIX) \
807 in_file_vars = !in_file_vars; \
808 beg_end_state = NOMINAL; \
811 /* Skip until we get to the file vars, if any. */
815 UPDATE_BEG_END_STATE (ch
);
817 while (!in_file_vars
&& ch
!= '\n' && ch
!= EOF
);
821 char var
[100], *var_end
, val
[100], *val_end
;
825 /* Read a variable name. */
826 while (ch
== ' ' || ch
== '\t')
830 while (ch
!= ':' && ch
!= '\n' && ch
!= EOF
)
832 if (var_end
< var
+ sizeof var
- 1)
834 UPDATE_BEG_END_STATE (ch
);
839 && (var_end
[-1] == ' ' || var_end
[-1] == '\t'))
845 /* Read a variable value. */
848 while (ch
== ' ' || ch
== '\t')
852 while (ch
!= ';' && ch
!= '\n' && ch
!= EOF
&& in_file_vars
)
854 if (val_end
< val
+ sizeof val
- 1)
856 UPDATE_BEG_END_STATE (ch
);
860 /* The value was terminated by an end-marker, which
864 && (val_end
[-1] == ' ' || val_end
[-1] == '\t'))
868 if (strcmp (var
, "lexical-binding") == 0)
871 rv
= (strcmp (val
, "nil") != 0);
877 while (ch
!= '\n' && ch
!= EOF
)
885 /* Value is a version number of byte compiled code if the file
886 associated with file descriptor FD is a compiled Lisp file that's
887 safe to load. Only files compiled with Emacs are safe to load.
888 Files compiled with XEmacs can lead to a crash in Fbyte_code
889 because of an incompatible change in the byte compiler. */
892 safe_to_load_p (int fd
)
899 /* Read the first few bytes from the file, and look for a line
900 specifying the byte compiler version used. */
901 nbytes
= emacs_read (fd
, buf
, sizeof buf
- 1);
906 /* Skip to the next newline, skipping over the initial `ELC'
907 with NUL bytes following it, but note the version. */
908 for (i
= 0; i
< nbytes
&& buf
[i
] != '\n'; ++i
)
913 || fast_c_string_match_ignore_case (Vbytecomp_version_regexp
,
920 lseek (fd
, 0, SEEK_SET
);
925 /* Callback for record_unwind_protect. Restore the old load list OLD,
926 after loading a file successfully. */
929 record_load_unwind (Lisp_Object old
)
931 return Vloads_in_progress
= old
;
934 /* This handler function is used via internal_condition_case_1. */
937 load_error_handler (Lisp_Object data
)
943 load_warn_old_style_backquotes (Lisp_Object file
)
945 if (!NILP (Vold_style_backquotes
))
948 args
[0] = build_string ("Loading `%s': old-style backquotes detected!");
955 DEFUN ("get-load-suffixes", Fget_load_suffixes
, Sget_load_suffixes
, 0, 0, 0,
956 doc
: /* Return the suffixes that `load' should try if a suffix is \
958 This uses the variables `load-suffixes' and `load-file-rep-suffixes'. */)
961 Lisp_Object lst
= Qnil
, suffixes
= Vload_suffixes
, suffix
, ext
;
962 while (CONSP (suffixes
))
964 Lisp_Object exts
= Vload_file_rep_suffixes
;
965 suffix
= XCAR (suffixes
);
966 suffixes
= XCDR (suffixes
);
971 lst
= Fcons (concat2 (suffix
, ext
), lst
);
974 return Fnreverse (lst
);
977 DEFUN ("load", Fload
, Sload
, 1, 5, 0,
978 doc
: /* Execute a file of Lisp code named FILE.
979 First try FILE with `.elc' appended, then try with `.el',
980 then try FILE unmodified (the exact suffixes in the exact order are
981 determined by `load-suffixes'). Environment variable references in
982 FILE are replaced with their values by calling `substitute-in-file-name'.
983 This function searches the directories in `load-path'.
985 If optional second arg NOERROR is non-nil,
986 report no error if FILE doesn't exist.
987 Print messages at start and end of loading unless
988 optional third arg NOMESSAGE is non-nil (but `force-load-messages'
990 If optional fourth arg NOSUFFIX is non-nil, don't try adding
991 suffixes `.elc' or `.el' to the specified name FILE.
992 If optional fifth arg MUST-SUFFIX is non-nil, insist on
993 the suffix `.elc' or `.el'; don't accept just FILE unless
994 it ends in one of those suffixes or includes a directory name.
996 If this function fails to find a file, it may look for different
997 representations of that file before trying another file.
998 It does so by adding the non-empty suffixes in `load-file-rep-suffixes'
999 to the file name. Emacs uses this feature mainly to find compressed
1000 versions of files when Auto Compression mode is enabled.
1002 The exact suffixes that this function tries out, in the exact order,
1003 are given by the value of the variable `load-file-rep-suffixes' if
1004 NOSUFFIX is non-nil and by the return value of the function
1005 `get-load-suffixes' if MUST-SUFFIX is non-nil. If both NOSUFFIX and
1006 MUST-SUFFIX are nil, this function first tries out the latter suffixes
1007 and then the former.
1009 Loading a file records its definitions, and its `provide' and
1010 `require' calls, in an element of `load-history' whose
1011 car is the file name loaded. See `load-history'.
1013 While the file is in the process of being loaded, the variable
1014 `load-in-progress' is non-nil and the variable `load-file-name'
1015 is bound to the file's name.
1017 Return t if the file exists and loads successfully. */)
1018 (Lisp_Object file
, Lisp_Object noerror
, Lisp_Object nomessage
, Lisp_Object nosuffix
, Lisp_Object must_suffix
)
1020 register FILE *stream
;
1021 register int fd
= -1;
1022 int count
= SPECPDL_INDEX ();
1023 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1024 Lisp_Object found
, efound
, hist_file_name
;
1025 /* 1 means we printed the ".el is newer" message. */
1027 /* 1 means we are loading a compiled file. */
1029 Lisp_Object handler
;
1031 const char *fmode
= "r";
1039 CHECK_STRING (file
);
1041 /* If file name is magic, call the handler. */
1042 /* This shouldn't be necessary any more now that `openp' handles it right.
1043 handler = Ffind_file_name_handler (file, Qload);
1044 if (!NILP (handler))
1045 return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */
1047 /* Do this after the handler to avoid
1048 the need to gcpro noerror, nomessage and nosuffix.
1049 (Below here, we care only whether they are nil or not.)
1050 The presence of this call is the result of a historical accident:
1051 it used to be in every file-operation and when it got removed
1052 everywhere, it accidentally stayed here. Since then, enough people
1053 supposedly have things like (load "$PROJECT/foo.el") in their .emacs
1054 that it seemed risky to remove. */
1055 if (! NILP (noerror
))
1057 file
= internal_condition_case_1 (Fsubstitute_in_file_name
, file
,
1058 Qt
, load_error_handler
);
1063 file
= Fsubstitute_in_file_name (file
);
1066 /* Avoid weird lossage with null string as arg,
1067 since it would try to load a directory as a Lisp file */
1068 if (SCHARS (file
) > 0)
1070 int size
= SBYTES (file
);
1073 GCPRO2 (file
, found
);
1075 if (! NILP (must_suffix
))
1077 /* Don't insist on adding a suffix if FILE already ends with one. */
1079 && !strcmp (SSDATA (file
) + size
- 3, ".el"))
1082 && !strcmp (SSDATA (file
) + size
- 4, ".elc"))
1084 /* Don't insist on adding a suffix
1085 if the argument includes a directory name. */
1086 else if (! NILP (Ffile_name_directory (file
)))
1090 fd
= openp (Vload_path
, file
,
1091 (!NILP (nosuffix
) ? Qnil
1092 : !NILP (must_suffix
) ? Fget_load_suffixes ()
1093 : Fappend (2, (tmp
[0] = Fget_load_suffixes (),
1094 tmp
[1] = Vload_file_rep_suffixes
,
1103 xsignal2 (Qfile_error
, build_string ("Cannot open load file"), file
);
1107 /* Tell startup.el whether or not we found the user's init file. */
1108 if (EQ (Qt
, Vuser_init_file
))
1109 Vuser_init_file
= found
;
1111 /* If FD is -2, that means openp found a magic file. */
1114 if (NILP (Fequal (found
, file
)))
1115 /* If FOUND is a different file name from FILE,
1116 find its handler even if we have already inhibited
1117 the `load' operation on FILE. */
1118 handler
= Ffind_file_name_handler (found
, Qt
);
1120 handler
= Ffind_file_name_handler (found
, Qload
);
1121 if (! NILP (handler
))
1122 return call5 (handler
, Qload
, found
, noerror
, nomessage
, Qt
);
1125 /* Check if we're stuck in a recursive load cycle.
1127 2000-09-21: It's not possible to just check for the file loaded
1128 being a member of Vloads_in_progress. This fails because of the
1129 way the byte compiler currently works; `provide's are not
1130 evaluated, see font-lock.el/jit-lock.el as an example. This
1131 leads to a certain amount of ``normal'' recursion.
1133 Also, just loading a file recursively is not always an error in
1134 the general case; the second load may do something different. */
1138 for (tem
= Vloads_in_progress
; CONSP (tem
); tem
= XCDR (tem
))
1139 if (!NILP (Fequal (found
, XCAR (tem
))) && (++load_count
> 3))
1143 signal_error ("Recursive load", Fcons (found
, Vloads_in_progress
));
1145 record_unwind_protect (record_load_unwind
, Vloads_in_progress
);
1146 Vloads_in_progress
= Fcons (found
, Vloads_in_progress
);
1149 /* All loads are by default dynamic, unless the file itself specifies
1150 otherwise using a file-variable in the first line. This is bound here
1151 so that it takes effect whether or not we use
1152 Vload_source_file_function. */
1153 specbind (Qlexical_binding
, Qnil
);
1155 /* Get the name for load-history. */
1156 hist_file_name
= (! NILP (Vpurify_flag
)
1157 ? Fconcat (2, (tmp
[0] = Ffile_name_directory (file
),
1158 tmp
[1] = Ffile_name_nondirectory (found
),
1164 /* Check for the presence of old-style quotes and warn about them. */
1165 specbind (Qold_style_backquotes
, Qnil
);
1166 record_unwind_protect (load_warn_old_style_backquotes
, file
);
1168 if (!memcmp (SDATA (found
) + SBYTES (found
) - 4, ".elc", 4)
1169 || (fd
>= 0 && (version
= safe_to_load_p (fd
)) > 0))
1170 /* Load .elc files directly, but not when they are
1171 remote and have no handler! */
1178 GCPRO3 (file
, found
, hist_file_name
);
1181 && ! (version
= safe_to_load_p (fd
)))
1184 if (!load_dangerous_libraries
)
1188 error ("File `%s' was not compiled in Emacs",
1191 else if (!NILP (nomessage
) && !force_load_messages
)
1192 message_with_string ("File `%s' not compiled in Emacs", found
, 1);
1197 efound
= ENCODE_FILE (found
);
1202 stat (SSDATA (efound
), &s1
);
1203 SSET (efound
, SBYTES (efound
) - 1, 0);
1204 result
= stat (SSDATA (efound
), &s2
);
1205 SSET (efound
, SBYTES (efound
) - 1, 'c');
1207 if (result
>= 0 && (unsigned) s1
.st_mtime
< (unsigned) s2
.st_mtime
)
1209 /* Make the progress messages mention that source is newer. */
1212 /* If we won't print another message, mention this anyway. */
1213 if (!NILP (nomessage
) && !force_load_messages
)
1215 Lisp_Object msg_file
;
1216 msg_file
= Fsubstring (found
, make_number (0), make_number (-1));
1217 message_with_string ("Source file `%s' newer than byte-compiled file",
1226 /* We are loading a source file (*.el). */
1227 if (!NILP (Vload_source_file_function
))
1233 val
= call4 (Vload_source_file_function
, found
, hist_file_name
,
1234 NILP (noerror
) ? Qnil
: Qt
,
1235 (NILP (nomessage
) || force_load_messages
) ? Qnil
: Qt
);
1236 return unbind_to (count
, val
);
1240 GCPRO3 (file
, found
, hist_file_name
);
1244 efound
= ENCODE_FILE (found
);
1245 stream
= fopen (SSDATA (efound
), fmode
);
1246 #else /* not WINDOWSNT */
1247 stream
= fdopen (fd
, fmode
);
1248 #endif /* not WINDOWSNT */
1252 error ("Failure to create stdio stream for %s", SDATA (file
));
1255 if (! NILP (Vpurify_flag
))
1256 Vpreloaded_file_list
= Fcons (Fpurecopy(file
), Vpreloaded_file_list
);
1258 if (NILP (nomessage
) || force_load_messages
)
1261 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...",
1264 message_with_string ("Loading %s (source)...", file
, 1);
1266 message_with_string ("Loading %s (compiled; note, source file is newer)...",
1268 else /* The typical case; compiled file newer than source file. */
1269 message_with_string ("Loading %s...", file
, 1);
1272 record_unwind_protect (load_unwind
, make_save_value (stream
, 0));
1273 record_unwind_protect (load_descriptor_unwind
, load_descriptor_list
);
1274 specbind (Qload_file_name
, found
);
1275 specbind (Qinhibit_file_name_operation
, Qnil
);
1276 load_descriptor_list
1277 = Fcons (make_number (fileno (stream
)), load_descriptor_list
);
1279 specbind (Qload_in_progress
, Qt
);
1282 if (lisp_file_lexically_bound_p (Qget_file_char
))
1283 Fset (Qlexical_binding
, Qt
);
1285 if (! version
|| version
>= 22)
1286 readevalloop (Qget_file_char
, stream
, hist_file_name
,
1287 0, Qnil
, Qnil
, Qnil
, Qnil
);
1290 /* We can't handle a file which was compiled with
1291 byte-compile-dynamic by older version of Emacs. */
1292 specbind (Qload_force_doc_strings
, Qt
);
1293 readevalloop (Qget_emacs_mule_file_char
, stream
, hist_file_name
,
1294 0, Qnil
, Qnil
, Qnil
, Qnil
);
1296 unbind_to (count
, Qnil
);
1298 /* Run any eval-after-load forms for this file */
1299 if (!NILP (Ffboundp (Qdo_after_load_evaluation
)))
1300 call1 (Qdo_after_load_evaluation
, hist_file_name
) ;
1304 xfree (saved_doc_string
);
1305 saved_doc_string
= 0;
1306 saved_doc_string_size
= 0;
1308 xfree (prev_saved_doc_string
);
1309 prev_saved_doc_string
= 0;
1310 prev_saved_doc_string_size
= 0;
1312 if (!noninteractive
&& (NILP (nomessage
) || force_load_messages
))
1315 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done",
1318 message_with_string ("Loading %s (source)...done", file
, 1);
1320 message_with_string ("Loading %s (compiled; note, source file is newer)...done",
1322 else /* The typical case; compiled file newer than source file. */
1323 message_with_string ("Loading %s...done", file
, 1);
1330 load_unwind (Lisp_Object arg
) /* used as unwind-protect function in load */
1332 FILE *stream
= (FILE *) XSAVE_VALUE (arg
)->pointer
;
1343 load_descriptor_unwind (Lisp_Object oldlist
)
1345 load_descriptor_list
= oldlist
;
1349 /* Close all descriptors in use for Floads.
1350 This is used when starting a subprocess. */
1353 close_load_descs (void)
1357 for (tail
= load_descriptor_list
; CONSP (tail
); tail
= XCDR (tail
))
1358 emacs_close (XFASTINT (XCAR (tail
)));
1363 complete_filename_p (Lisp_Object pathname
)
1365 register const unsigned char *s
= SDATA (pathname
);
1366 return (IS_DIRECTORY_SEP (s
[0])
1367 || (SCHARS (pathname
) > 2
1368 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2])));
1371 DEFUN ("locate-file-internal", Flocate_file_internal
, Slocate_file_internal
, 2, 4, 0,
1372 doc
: /* Search for FILENAME through PATH.
1373 Returns the file's name in absolute form, or nil if not found.
1374 If SUFFIXES is non-nil, it should be a list of suffixes to append to
1375 file name when searching.
1376 If non-nil, PREDICATE is used instead of `file-readable-p'.
1377 PREDICATE can also be an integer to pass to the access(2) function,
1378 in which case file-name-handlers are ignored.
1379 This function will normally skip directories, so if you want it to find
1380 directories, make sure the PREDICATE function returns `dir-ok' for them. */)
1381 (Lisp_Object filename
, Lisp_Object path
, Lisp_Object suffixes
, Lisp_Object predicate
)
1384 int fd
= openp (path
, filename
, suffixes
, &file
, predicate
);
1385 if (NILP (predicate
) && fd
> 0)
1390 static Lisp_Object Qdir_ok
;
1392 /* Search for a file whose name is STR, looking in directories
1393 in the Lisp list PATH, and trying suffixes from SUFFIX.
1394 On success, returns a file descriptor. On failure, returns -1.
1396 SUFFIXES is a list of strings containing possible suffixes.
1397 The empty suffix is automatically added if the list is empty.
1399 PREDICATE non-nil means don't open the files,
1400 just look for one that satisfies the predicate. In this case,
1401 returns 1 on success. The predicate can be a lisp function or
1402 an integer to pass to `access' (in which case file-name-handlers
1405 If STOREPTR is nonzero, it points to a slot where the name of
1406 the file actually found should be stored as a Lisp string.
1407 nil is stored there on failure.
1409 If the file we find is remote, return -2
1410 but store the found remote file name in *STOREPTR. */
1413 openp (Lisp_Object path
, Lisp_Object str
, Lisp_Object suffixes
, Lisp_Object
*storeptr
, Lisp_Object predicate
)
1418 register char *fn
= buf
;
1421 Lisp_Object filename
;
1423 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
, gcpro6
;
1424 Lisp_Object string
, tail
, encoded_fn
;
1425 int max_suffix_len
= 0;
1429 for (tail
= suffixes
; CONSP (tail
); tail
= XCDR (tail
))
1431 CHECK_STRING_CAR (tail
);
1432 max_suffix_len
= max (max_suffix_len
,
1433 SBYTES (XCAR (tail
)));
1436 string
= filename
= encoded_fn
= Qnil
;
1437 GCPRO6 (str
, string
, filename
, path
, suffixes
, encoded_fn
);
1442 if (complete_filename_p (str
))
1445 for (; CONSP (path
); path
= XCDR (path
))
1447 filename
= Fexpand_file_name (str
, XCAR (path
));
1448 if (!complete_filename_p (filename
))
1449 /* If there are non-absolute elts in PATH (eg ".") */
1450 /* Of course, this could conceivably lose if luser sets
1451 default-directory to be something non-absolute... */
1453 filename
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
1454 if (!complete_filename_p (filename
))
1455 /* Give up on this path element! */
1459 /* Calculate maximum size of any filename made from
1460 this path element/specified file name and any possible suffix. */
1461 want_size
= max_suffix_len
+ SBYTES (filename
) + 1;
1462 if (fn_size
< want_size
)
1463 fn
= (char *) alloca (fn_size
= 100 + want_size
);
1465 /* Loop over suffixes. */
1466 for (tail
= NILP (suffixes
) ? Fcons (empty_unibyte_string
, Qnil
) : suffixes
;
1467 CONSP (tail
); tail
= XCDR (tail
))
1469 int lsuffix
= SBYTES (XCAR (tail
));
1470 Lisp_Object handler
;
1473 /* Concatenate path element/specified name with the suffix.
1474 If the directory starts with /:, remove that. */
1475 if (SCHARS (filename
) > 2
1476 && SREF (filename
, 0) == '/'
1477 && SREF (filename
, 1) == ':')
1479 strncpy (fn
, SSDATA (filename
) + 2,
1480 SBYTES (filename
) - 2);
1481 fn
[SBYTES (filename
) - 2] = 0;
1485 strncpy (fn
, SSDATA (filename
),
1487 fn
[SBYTES (filename
)] = 0;
1490 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
1491 strncat (fn
, SSDATA (XCAR (tail
)), lsuffix
);
1493 /* Check that the file exists and is not a directory. */
1494 /* We used to only check for handlers on non-absolute file names:
1498 handler = Ffind_file_name_handler (filename, Qfile_exists_p);
1499 It's not clear why that was the case and it breaks things like
1500 (load "/bar.el") where the file is actually "/bar.el.gz". */
1501 string
= build_string (fn
);
1502 handler
= Ffind_file_name_handler (string
, Qfile_exists_p
);
1503 if ((!NILP (handler
) || !NILP (predicate
)) && !NATNUMP (predicate
))
1505 if (NILP (predicate
))
1506 exists
= !NILP (Ffile_readable_p (string
));
1509 Lisp_Object tmp
= call1 (predicate
, string
);
1510 exists
= !NILP (tmp
)
1511 && (EQ (tmp
, Qdir_ok
)
1512 || NILP (Ffile_directory_p (string
)));
1517 /* We succeeded; return this descriptor and filename. */
1528 encoded_fn
= ENCODE_FILE (string
);
1529 pfn
= SSDATA (encoded_fn
);
1530 exists
= (stat (pfn
, &st
) == 0 && ! S_ISDIR (st
.st_mode
));
1533 /* Check that we can access or open it. */
1534 if (NATNUMP (predicate
))
1535 fd
= (access (pfn
, XFASTINT (predicate
)) == 0) ? 1 : -1;
1537 fd
= emacs_open (pfn
, O_RDONLY
, 0);
1541 /* We succeeded; return this descriptor and filename. */
1559 /* Merge the list we've accumulated of globals from the current input source
1560 into the load_history variable. The details depend on whether
1561 the source has an associated file name or not.
1563 FILENAME is the file name that we are loading from.
1564 ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */
1567 build_load_history (Lisp_Object filename
, int entire
)
1569 register Lisp_Object tail
, prev
, newelt
;
1570 register Lisp_Object tem
, tem2
;
1571 register int foundit
= 0;
1573 tail
= Vload_history
;
1576 while (CONSP (tail
))
1580 /* Find the feature's previous assoc list... */
1581 if (!NILP (Fequal (filename
, Fcar (tem
))))
1585 /* If we're loading the entire file, remove old data. */
1589 Vload_history
= XCDR (tail
);
1591 Fsetcdr (prev
, XCDR (tail
));
1594 /* Otherwise, cons on new symbols that are not already members. */
1597 tem2
= Vcurrent_load_list
;
1599 while (CONSP (tem2
))
1601 newelt
= XCAR (tem2
);
1603 if (NILP (Fmember (newelt
, tem
)))
1604 Fsetcar (tail
, Fcons (XCAR (tem
),
1605 Fcons (newelt
, XCDR (tem
))));
1618 /* If we're loading an entire file, cons the new assoc onto the
1619 front of load-history, the most-recently-loaded position. Also
1620 do this if we didn't find an existing member for the file. */
1621 if (entire
|| !foundit
)
1622 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
1627 unreadpure (Lisp_Object junk
) /* Used as unwind-protect function in readevalloop */
1634 readevalloop_1 (Lisp_Object old
)
1636 load_convert_to_unibyte
= ! NILP (old
);
1640 /* Signal an `end-of-file' error, if possible with file name
1644 end_of_file_error (void)
1646 if (STRINGP (Vload_file_name
))
1647 xsignal1 (Qend_of_file
, Vload_file_name
);
1649 xsignal0 (Qend_of_file
);
1652 /* UNIBYTE specifies how to set load_convert_to_unibyte
1653 for this invocation.
1654 READFUN, if non-nil, is used instead of `read'.
1656 START, END specify region to read in current buffer (from eval-region).
1657 If the input is not from a buffer, they must be nil. */
1660 readevalloop (Lisp_Object readcharfun
,
1662 Lisp_Object sourcename
,
1664 Lisp_Object unibyte
, Lisp_Object readfun
,
1665 Lisp_Object start
, Lisp_Object end
)
1668 register Lisp_Object val
;
1669 int count
= SPECPDL_INDEX ();
1670 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1671 struct buffer
*b
= 0;
1672 int continue_reading_p
;
1673 Lisp_Object lex_bound
;
1674 /* Nonzero if reading an entire buffer. */
1675 int whole_buffer
= 0;
1676 /* 1 on the first time around. */
1679 if (MARKERP (readcharfun
))
1682 start
= readcharfun
;
1685 if (BUFFERP (readcharfun
))
1686 b
= XBUFFER (readcharfun
);
1687 else if (MARKERP (readcharfun
))
1688 b
= XMARKER (readcharfun
)->buffer
;
1690 /* We assume START is nil when input is not from a buffer. */
1691 if (! NILP (start
) && !b
)
1694 specbind (Qstandard_input
, readcharfun
); /* GCPROs readcharfun. */
1695 specbind (Qcurrent_load_list
, Qnil
);
1696 record_unwind_protect (readevalloop_1
, load_convert_to_unibyte
? Qt
: Qnil
);
1697 load_convert_to_unibyte
= !NILP (unibyte
);
1699 /* If lexical binding is active (either because it was specified in
1700 the file's header, or via a buffer-local variable), create an empty
1701 lexical environment, otherwise, turn off lexical binding. */
1702 lex_bound
= find_symbol_value (Qlexical_binding
);
1703 specbind (Qinternal_interpreter_environment
,
1704 NILP (lex_bound
) || EQ (lex_bound
, Qunbound
)
1705 ? Qnil
: Fcons (Qt
, Qnil
));
1707 GCPRO4 (sourcename
, readfun
, start
, end
);
1709 /* Try to ensure sourcename is a truename, except whilst preloading. */
1710 if (NILP (Vpurify_flag
)
1711 && !NILP (sourcename
) && !NILP (Ffile_name_absolute_p (sourcename
))
1712 && !NILP (Ffboundp (Qfile_truename
)))
1713 sourcename
= call1 (Qfile_truename
, sourcename
) ;
1715 LOADHIST_ATTACH (sourcename
);
1717 continue_reading_p
= 1;
1718 while (continue_reading_p
)
1720 int count1
= SPECPDL_INDEX ();
1722 if (b
!= 0 && NILP (BVAR (b
, name
)))
1723 error ("Reading from killed buffer");
1727 /* Switch to the buffer we are reading from. */
1728 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1729 set_buffer_internal (b
);
1731 /* Save point in it. */
1732 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1733 /* Save ZV in it. */
1734 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1735 /* Those get unbound after we read one expression. */
1737 /* Set point and ZV around stuff to be read. */
1740 Fnarrow_to_region (make_number (BEGV
), end
);
1742 /* Just for cleanliness, convert END to a marker
1743 if it is an integer. */
1745 end
= Fpoint_max_marker ();
1748 /* On the first cycle, we can easily test here
1749 whether we are reading the whole buffer. */
1750 if (b
&& first_sexp
)
1751 whole_buffer
= (PT
== BEG
&& ZV
== Z
);
1758 while ((c
= READCHAR
) != '\n' && c
!= -1);
1763 unbind_to (count1
, Qnil
);
1767 /* Ignore whitespace here, so we can detect eof. */
1768 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r'
1769 || c
== 0x8a0) /* NBSP */
1772 if (!NILP (Vpurify_flag
) && c
== '(')
1774 record_unwind_protect (unreadpure
, Qnil
);
1775 val
= read_list (-1, readcharfun
);
1780 read_objects
= Qnil
;
1781 if (!NILP (readfun
))
1783 val
= call1 (readfun
, readcharfun
);
1785 /* If READCHARFUN has set point to ZV, we should
1786 stop reading, even if the form read sets point
1787 to a different value when evaluated. */
1788 if (BUFFERP (readcharfun
))
1790 struct buffer
*buf
= XBUFFER (readcharfun
);
1791 if (BUF_PT (buf
) == BUF_ZV (buf
))
1792 continue_reading_p
= 0;
1795 else if (! NILP (Vload_read_function
))
1796 val
= call1 (Vload_read_function
, readcharfun
);
1798 val
= read_internal_start (readcharfun
, Qnil
, Qnil
);
1801 if (!NILP (start
) && continue_reading_p
)
1802 start
= Fpoint_marker ();
1804 /* Restore saved point and BEGV. */
1805 unbind_to (count1
, Qnil
);
1807 /* Now eval what we just read. */
1808 val
= eval_sub (val
);
1812 Vvalues
= Fcons (val
, Vvalues
);
1813 if (EQ (Vstandard_output
, Qt
))
1822 build_load_history (sourcename
,
1823 stream
|| whole_buffer
);
1827 unbind_to (count
, Qnil
);
1830 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 5, "",
1831 doc
: /* Execute the current buffer as Lisp code.
1832 When called from a Lisp program (i.e., not interactively), this
1833 function accepts up to five optional arguments:
1834 BUFFER is the buffer to evaluate (nil means use current buffer).
1835 PRINTFLAG controls printing of output:
1836 A value of nil means discard it; anything else is stream for print.
1837 FILENAME specifies the file name to use for `load-history'.
1838 UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this
1840 DO-ALLOW-PRINT, if non-nil, specifies that `print' and related
1841 functions should work normally even if PRINTFLAG is nil.
1843 This function preserves the position of point. */)
1844 (Lisp_Object buffer
, Lisp_Object printflag
, Lisp_Object filename
, Lisp_Object unibyte
, Lisp_Object do_allow_print
)
1846 int count
= SPECPDL_INDEX ();
1847 Lisp_Object tem
, buf
;
1850 buf
= Fcurrent_buffer ();
1852 buf
= Fget_buffer (buffer
);
1854 error ("No such buffer");
1856 if (NILP (printflag
) && NILP (do_allow_print
))
1861 if (NILP (filename
))
1862 filename
= BVAR (XBUFFER (buf
), filename
);
1864 specbind (Qeval_buffer_list
, Fcons (buf
, Veval_buffer_list
));
1865 specbind (Qstandard_output
, tem
);
1866 specbind (Qlexical_binding
, Qnil
);
1867 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1868 BUF_TEMP_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
1869 if (lisp_file_lexically_bound_p (buf
))
1870 Fset (Qlexical_binding
, Qt
);
1871 readevalloop (buf
, 0, filename
,
1872 !NILP (printflag
), unibyte
, Qnil
, Qnil
, Qnil
);
1873 unbind_to (count
, Qnil
);
1878 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 4, "r",
1879 doc
: /* Execute the region as Lisp code.
1880 When called from programs, expects two arguments,
1881 giving starting and ending indices in the current buffer
1882 of the text to be executed.
1883 Programs can pass third argument PRINTFLAG which controls output:
1884 A value of nil means discard it; anything else is stream for printing it.
1885 Also the fourth argument READ-FUNCTION, if non-nil, is used
1886 instead of `read' to read each expression. It gets one argument
1887 which is the input stream for reading characters.
1889 This function does not move point. */)
1890 (Lisp_Object start
, Lisp_Object end
, Lisp_Object printflag
, Lisp_Object read_function
)
1892 /* FIXME: Do the eval-sexp-add-defvars danse! */
1893 int count
= SPECPDL_INDEX ();
1894 Lisp_Object tem
, cbuf
;
1896 cbuf
= Fcurrent_buffer ();
1898 if (NILP (printflag
))
1902 specbind (Qstandard_output
, tem
);
1903 specbind (Qeval_buffer_list
, Fcons (cbuf
, Veval_buffer_list
));
1905 /* readevalloop calls functions which check the type of start and end. */
1906 readevalloop (cbuf
, 0, BVAR (XBUFFER (cbuf
), filename
),
1907 !NILP (printflag
), Qnil
, read_function
,
1910 return unbind_to (count
, Qnil
);
1914 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
1915 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
1916 If STREAM is nil, use the value of `standard-input' (which see).
1917 STREAM or the value of `standard-input' may be:
1918 a buffer (read from point and advance it)
1919 a marker (read from where it points and advance it)
1920 a function (call it with no arguments for each character,
1921 call it with a char as argument to push a char back)
1922 a string (takes text from string, starting at the beginning)
1923 t (read text line using minibuffer and use it, or read from
1924 standard input in batch mode). */)
1925 (Lisp_Object stream
)
1928 stream
= Vstandard_input
;
1929 if (EQ (stream
, Qt
))
1930 stream
= Qread_char
;
1931 if (EQ (stream
, Qread_char
))
1932 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
1934 return read_internal_start (stream
, Qnil
, Qnil
);
1937 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
1938 doc
: /* Read one Lisp expression which is represented as text by STRING.
1939 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1940 START and END optionally delimit a substring of STRING from which to read;
1941 they default to 0 and (length STRING) respectively. */)
1942 (Lisp_Object string
, Lisp_Object start
, Lisp_Object end
)
1945 CHECK_STRING (string
);
1946 /* read_internal_start sets read_from_string_index. */
1947 ret
= read_internal_start (string
, start
, end
);
1948 return Fcons (ret
, make_number (read_from_string_index
));
1951 /* Function to set up the global context we need in toplevel read
1954 read_internal_start (Lisp_Object stream
, Lisp_Object start
, Lisp_Object end
)
1955 /* start, end only used when stream is a string. */
1960 new_backquote_flag
= 0;
1961 read_objects
= Qnil
;
1962 if (EQ (Vread_with_symbol_positions
, Qt
)
1963 || EQ (Vread_with_symbol_positions
, stream
))
1964 Vread_symbol_positions_list
= Qnil
;
1966 if (STRINGP (stream
)
1967 || ((CONSP (stream
) && STRINGP (XCAR (stream
)))))
1969 EMACS_INT startval
, endval
;
1972 if (STRINGP (stream
))
1975 string
= XCAR (stream
);
1978 endval
= SCHARS (string
);
1982 endval
= XINT (end
);
1983 if (endval
< 0 || endval
> SCHARS (string
))
1984 args_out_of_range (string
, end
);
1991 CHECK_NUMBER (start
);
1992 startval
= XINT (start
);
1993 if (startval
< 0 || startval
> endval
)
1994 args_out_of_range (string
, start
);
1996 read_from_string_index
= startval
;
1997 read_from_string_index_byte
= string_char_to_byte (string
, startval
);
1998 read_from_string_limit
= endval
;
2001 retval
= read0 (stream
);
2002 if (EQ (Vread_with_symbol_positions
, Qt
)
2003 || EQ (Vread_with_symbol_positions
, stream
))
2004 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
2009 /* Signal Qinvalid_read_syntax error.
2010 S is error string of length N (if > 0) */
2013 invalid_syntax (const char *s
, int n
)
2017 xsignal1 (Qinvalid_read_syntax
, make_string (s
, n
));
2021 /* Use this for recursive reads, in contexts where internal tokens
2025 read0 (Lisp_Object readcharfun
)
2027 register Lisp_Object val
;
2030 val
= read1 (readcharfun
, &c
, 0);
2034 xsignal1 (Qinvalid_read_syntax
,
2035 Fmake_string (make_number (1), make_number (c
)));
2038 static int read_buffer_size
;
2039 static char *read_buffer
;
2041 /* Read a \-escape sequence, assuming we already read the `\'.
2042 If the escape sequence forces unibyte, return eight-bit char. */
2045 read_escape (Lisp_Object readcharfun
, int stringp
)
2047 register int c
= READCHAR
;
2048 /* \u allows up to four hex digits, \U up to eight. Default to the
2049 behavior for \u, and change this value in the case that \U is seen. */
2050 int unicode_hex_count
= 4;
2055 end_of_file_error ();
2085 error ("Invalid escape character syntax");
2088 c
= read_escape (readcharfun
, 0);
2089 return c
| meta_modifier
;
2094 error ("Invalid escape character syntax");
2097 c
= read_escape (readcharfun
, 0);
2098 return c
| shift_modifier
;
2103 error ("Invalid escape character syntax");
2106 c
= read_escape (readcharfun
, 0);
2107 return c
| hyper_modifier
;
2112 error ("Invalid escape character syntax");
2115 c
= read_escape (readcharfun
, 0);
2116 return c
| alt_modifier
;
2120 if (stringp
|| c
!= '-')
2127 c
= read_escape (readcharfun
, 0);
2128 return c
| super_modifier
;
2133 error ("Invalid escape character syntax");
2137 c
= read_escape (readcharfun
, 0);
2138 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
2139 return 0177 | (c
& CHAR_MODIFIER_MASK
);
2140 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
2141 return c
| ctrl_modifier
;
2142 /* ASCII control chars are made from letters (both cases),
2143 as well as the non-letters within 0100...0137. */
2144 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
2145 return (c
& (037 | ~0177));
2146 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
2147 return (c
& (037 | ~0177));
2149 return c
| ctrl_modifier
;
2159 /* An octal escape, as in ANSI C. */
2161 register int i
= c
- '0';
2162 register int count
= 0;
2165 if ((c
= READCHAR
) >= '0' && c
<= '7')
2177 if (i
>= 0x80 && i
< 0x100)
2178 i
= BYTE8_TO_CHAR (i
);
2183 /* A hex escape, as in ANSI C. */
2190 if (c
>= '0' && c
<= '9')
2195 else if ((c
>= 'a' && c
<= 'f')
2196 || (c
>= 'A' && c
<= 'F'))
2199 if (c
>= 'a' && c
<= 'f')
2212 if (count
< 3 && i
>= 0x80)
2213 return BYTE8_TO_CHAR (i
);
2218 /* Post-Unicode-2.0: Up to eight hex chars. */
2219 unicode_hex_count
= 8;
2222 /* A Unicode escape. We only permit them in strings and characters,
2223 not arbitrarily in the source code, as in some other languages. */
2228 while (++count
<= unicode_hex_count
)
2231 /* isdigit and isalpha may be locale-specific, which we don't
2233 if (c
>= '0' && c
<= '9') i
= (i
<< 4) + (c
- '0');
2234 else if (c
>= 'a' && c
<= 'f') i
= (i
<< 4) + (c
- 'a') + 10;
2235 else if (c
>= 'A' && c
<= 'F') i
= (i
<< 4) + (c
- 'A') + 10;
2238 error ("Non-hex digit used for Unicode escape");
2243 error ("Non-Unicode character: 0x%x", i
);
2252 /* Read an integer in radix RADIX using READCHARFUN to read
2253 characters. RADIX must be in the interval [2..36]; if it isn't, a
2254 read error is signaled . Value is the integer read. Signals an
2255 error if encountering invalid read syntax or if RADIX is out of
2259 read_integer (Lisp_Object readcharfun
, int radix
)
2261 int ndigits
= 0, invalid_p
, c
, sign
= 0;
2262 /* We use a floating point number because */
2265 if (radix
< 2 || radix
> 36)
2269 number
= ndigits
= invalid_p
= 0;
2285 if (c
>= '0' && c
<= '9')
2287 else if (c
>= 'a' && c
<= 'z')
2288 digit
= c
- 'a' + 10;
2289 else if (c
>= 'A' && c
<= 'Z')
2290 digit
= c
- 'A' + 10;
2297 if (digit
< 0 || digit
>= radix
)
2300 number
= radix
* number
+ digit
;
2306 if (ndigits
== 0 || invalid_p
)
2309 sprintf (buf
, "integer, radix %d", radix
);
2310 invalid_syntax (buf
, 0);
2313 return make_fixnum_or_float (sign
* number
);
2317 /* If the next token is ')' or ']' or '.', we store that character
2318 in *PCH and the return value is not interesting. Else, we store
2319 zero in *PCH and we read and return one lisp object.
2321 FIRST_IN_LIST is nonzero if this is the first element of a list. */
2324 read1 (register Lisp_Object readcharfun
, int *pch
, int first_in_list
)
2327 int uninterned_symbol
= 0;
2335 c
= READCHAR_REPORT_MULTIBYTE (&multibyte
);
2337 end_of_file_error ();
2342 return read_list (0, readcharfun
);
2345 return read_vector (readcharfun
, 0);
2361 /* Accept extended format for hashtables (extensible to
2363 #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */
2364 Lisp_Object tmp
= read_list (0, readcharfun
);
2365 Lisp_Object head
= CAR_SAFE (tmp
);
2366 Lisp_Object data
= Qnil
;
2367 Lisp_Object val
= Qnil
;
2368 /* The size is 2 * number of allowed keywords to
2370 Lisp_Object params
[10];
2372 Lisp_Object key
= Qnil
;
2373 int param_count
= 0;
2375 if (!EQ (head
, Qhash_table
))
2376 error ("Invalid extended read marker at head of #s list "
2377 "(only hash-table allowed)");
2379 tmp
= CDR_SAFE (tmp
);
2381 /* This is repetitive but fast and simple. */
2382 params
[param_count
] = QCsize
;
2383 params
[param_count
+1] = Fplist_get (tmp
, Qsize
);
2384 if (!NILP (params
[param_count
+ 1]))
2387 params
[param_count
] = QCtest
;
2388 params
[param_count
+1] = Fplist_get (tmp
, Qtest
);
2389 if (!NILP (params
[param_count
+ 1]))
2392 params
[param_count
] = QCweakness
;
2393 params
[param_count
+1] = Fplist_get (tmp
, Qweakness
);
2394 if (!NILP (params
[param_count
+ 1]))
2397 params
[param_count
] = QCrehash_size
;
2398 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_size
);
2399 if (!NILP (params
[param_count
+ 1]))
2402 params
[param_count
] = QCrehash_threshold
;
2403 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_threshold
);
2404 if (!NILP (params
[param_count
+ 1]))
2407 /* This is the hashtable data. */
2408 data
= Fplist_get (tmp
, Qdata
);
2410 /* Now use params to make a new hashtable and fill it. */
2411 ht
= Fmake_hash_table (param_count
, params
);
2413 while (CONSP (data
))
2418 error ("Odd number of elements in hashtable data");
2421 Fputhash (key
, val
, ht
);
2427 invalid_syntax ("#", 1);
2435 tmp
= read_vector (readcharfun
, 0);
2436 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
)
2437 error ("Invalid size char-table");
2438 XSETPVECTYPE (XVECTOR (tmp
), PVEC_CHAR_TABLE
);
2449 tmp
= read_vector (readcharfun
, 0);
2450 if (!INTEGERP (AREF (tmp
, 0)))
2451 error ("Invalid depth in char-table");
2452 depth
= XINT (AREF (tmp
, 0));
2453 if (depth
< 1 || depth
> 3)
2454 error ("Invalid depth in char-table");
2455 size
= XVECTOR (tmp
)->size
- 2;
2456 if (chartab_size
[depth
] != size
)
2457 error ("Invalid size char-table");
2458 XSETPVECTYPE (XVECTOR (tmp
), PVEC_SUB_CHAR_TABLE
);
2461 invalid_syntax ("#^^", 3);
2463 invalid_syntax ("#^", 2);
2468 length
= read1 (readcharfun
, pch
, first_in_list
);
2472 Lisp_Object tmp
, val
;
2474 = ((XFASTINT (length
) + BOOL_VECTOR_BITS_PER_CHAR
- 1)
2475 / BOOL_VECTOR_BITS_PER_CHAR
);
2478 tmp
= read1 (readcharfun
, pch
, first_in_list
);
2479 if (STRING_MULTIBYTE (tmp
)
2480 || (size_in_chars
!= SCHARS (tmp
)
2481 /* We used to print 1 char too many
2482 when the number of bits was a multiple of 8.
2483 Accept such input in case it came from an old
2485 && ! (XFASTINT (length
)
2486 == (SCHARS (tmp
) - 1) * BOOL_VECTOR_BITS_PER_CHAR
)))
2487 invalid_syntax ("#&...", 5);
2489 val
= Fmake_bool_vector (length
, Qnil
);
2490 memcpy (XBOOL_VECTOR (val
)->data
, SDATA (tmp
), size_in_chars
);
2491 /* Clear the extraneous bits in the last byte. */
2492 if (XINT (length
) != size_in_chars
* BOOL_VECTOR_BITS_PER_CHAR
)
2493 XBOOL_VECTOR (val
)->data
[size_in_chars
- 1]
2494 &= (1 << (XINT (length
) % BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2497 invalid_syntax ("#&...", 5);
2501 /* Accept compiled functions at read-time so that we don't have to
2502 build them using function calls. */
2504 tmp
= read_vector (readcharfun
, 1);
2505 return Fmake_byte_code (XVECTOR (tmp
)->size
,
2506 XVECTOR (tmp
)->contents
);
2511 struct gcpro gcpro1
;
2514 /* Read the string itself. */
2515 tmp
= read1 (readcharfun
, &ch
, 0);
2516 if (ch
!= 0 || !STRINGP (tmp
))
2517 invalid_syntax ("#", 1);
2519 /* Read the intervals and their properties. */
2522 Lisp_Object beg
, end
, plist
;
2524 beg
= read1 (readcharfun
, &ch
, 0);
2529 end
= read1 (readcharfun
, &ch
, 0);
2531 plist
= read1 (readcharfun
, &ch
, 0);
2533 invalid_syntax ("Invalid string property list", 0);
2534 Fset_text_properties (beg
, end
, plist
, tmp
);
2540 /* #@NUMBER is used to skip NUMBER following characters.
2541 That's used in .elc files to skip over doc strings
2542 and function definitions. */
2548 /* Read a decimal integer. */
2549 while ((c
= READCHAR
) >= 0
2550 && c
>= '0' && c
<= '9')
2558 if (load_force_doc_strings
2559 && (EQ (readcharfun
, Qget_file_char
)
2560 || EQ (readcharfun
, Qget_emacs_mule_file_char
)))
2562 /* If we are supposed to force doc strings into core right now,
2563 record the last string that we skipped,
2564 and record where in the file it comes from. */
2566 /* But first exchange saved_doc_string
2567 with prev_saved_doc_string, so we save two strings. */
2569 char *temp
= saved_doc_string
;
2570 int temp_size
= saved_doc_string_size
;
2571 file_offset temp_pos
= saved_doc_string_position
;
2572 int temp_len
= saved_doc_string_length
;
2574 saved_doc_string
= prev_saved_doc_string
;
2575 saved_doc_string_size
= prev_saved_doc_string_size
;
2576 saved_doc_string_position
= prev_saved_doc_string_position
;
2577 saved_doc_string_length
= prev_saved_doc_string_length
;
2579 prev_saved_doc_string
= temp
;
2580 prev_saved_doc_string_size
= temp_size
;
2581 prev_saved_doc_string_position
= temp_pos
;
2582 prev_saved_doc_string_length
= temp_len
;
2585 if (saved_doc_string_size
== 0)
2587 saved_doc_string_size
= nskip
+ 100;
2588 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
2590 if (nskip
> saved_doc_string_size
)
2592 saved_doc_string_size
= nskip
+ 100;
2593 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
2594 saved_doc_string_size
);
2597 saved_doc_string_position
= file_tell (instream
);
2599 /* Copy that many characters into saved_doc_string. */
2600 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2601 saved_doc_string
[i
] = c
= READCHAR
;
2603 saved_doc_string_length
= i
;
2607 /* Skip that many characters. */
2608 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2617 /* #! appears at the beginning of an executable file.
2618 Skip the first line. */
2619 while (c
!= '\n' && c
>= 0)
2624 return Vload_file_name
;
2626 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
2627 /* #:foo is the uninterned symbol named foo. */
2630 uninterned_symbol
= 1;
2634 /* Reader forms that can reuse previously read objects. */
2635 if (c
>= '0' && c
<= '9')
2640 /* Read a non-negative integer. */
2641 while (c
>= '0' && c
<= '9')
2647 /* #n=object returns object, but associates it with n for #n#. */
2648 if (c
== '=' && !NILP (Vread_circle
))
2650 /* Make a placeholder for #n# to use temporarily */
2651 Lisp_Object placeholder
;
2654 placeholder
= Fcons (Qnil
, Qnil
);
2655 cell
= Fcons (make_number (n
), placeholder
);
2656 read_objects
= Fcons (cell
, read_objects
);
2658 /* Read the object itself. */
2659 tem
= read0 (readcharfun
);
2661 /* Now put it everywhere the placeholder was... */
2662 substitute_object_in_subtree (tem
, placeholder
);
2664 /* ...and #n# will use the real value from now on. */
2665 Fsetcdr (cell
, tem
);
2669 /* #n# returns a previously read object. */
2670 if (c
== '#' && !NILP (Vread_circle
))
2672 tem
= Fassq (make_number (n
), read_objects
);
2675 /* Fall through to error message. */
2677 else if (c
== 'r' || c
== 'R')
2678 return read_integer (readcharfun
, n
);
2680 /* Fall through to error message. */
2682 else if (c
== 'x' || c
== 'X')
2683 return read_integer (readcharfun
, 16);
2684 else if (c
== 'o' || c
== 'O')
2685 return read_integer (readcharfun
, 8);
2686 else if (c
== 'b' || c
== 'B')
2687 return read_integer (readcharfun
, 2);
2690 invalid_syntax ("#", 1);
2693 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2698 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
2703 int next_char
= READCHAR
;
2705 /* Transition from old-style to new-style:
2706 If we see "(`" it used to mean old-style, which usually works
2707 fine because ` should almost never appear in such a position
2708 for new-style. But occasionally we need "(`" to mean new
2709 style, so we try to distinguish the two by the fact that we
2710 can either write "( `foo" or "(` foo", where the first
2711 intends to use new-style whereas the second intends to use
2712 old-style. For Emacs-25, we should completely remove this
2713 first_in_list exception (old-style can still be obtained via
2715 if (!new_backquote_flag
&& first_in_list
&& next_char
== ' ')
2717 Vold_style_backquotes
= Qt
;
2724 new_backquote_flag
++;
2725 value
= read0 (readcharfun
);
2726 new_backquote_flag
--;
2728 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
2733 int next_char
= READCHAR
;
2735 /* Transition from old-style to new-style:
2736 It used to be impossible to have a new-style , other than within
2737 a new-style `. This is sufficient when ` and , are used in the
2738 normal way, but ` and , can also appear in args to macros that
2739 will not interpret them in the usual way, in which case , may be
2740 used without any ` anywhere near.
2741 So we now use the same heuristic as for backquote: old-style
2742 unquotes are only recognized when first on a list, and when
2743 followed by a space.
2744 Because it's more difficult to peak 2 chars ahead, a new-style
2745 ,@ can still not be used outside of a `, unless it's in the middle
2747 if (new_backquote_flag
2749 || (next_char
!= ' ' && next_char
!= '@'))
2751 Lisp_Object comma_type
= Qnil
;
2756 comma_type
= Qcomma_at
;
2758 comma_type
= Qcomma_dot
;
2761 if (ch
>= 0) UNREAD (ch
);
2762 comma_type
= Qcomma
;
2765 value
= read0 (readcharfun
);
2766 return Fcons (comma_type
, Fcons (value
, Qnil
));
2770 Vold_style_backquotes
= Qt
;
2782 end_of_file_error ();
2784 /* Accept `single space' syntax like (list ? x) where the
2785 whitespace character is SPC or TAB.
2786 Other literal whitespace like NL, CR, and FF are not accepted,
2787 as there are well-established escape sequences for these. */
2788 if (c
== ' ' || c
== '\t')
2789 return make_number (c
);
2792 c
= read_escape (readcharfun
, 0);
2793 modifiers
= c
& CHAR_MODIFIER_MASK
;
2794 c
&= ~CHAR_MODIFIER_MASK
;
2795 if (CHAR_BYTE8_P (c
))
2796 c
= CHAR_TO_BYTE8 (c
);
2799 next_char
= READCHAR
;
2800 ok
= (next_char
<= 040
2801 || (next_char
< 0200
2802 && (strchr ("\"';()[]#?`,.", next_char
))));
2805 return make_number (c
);
2807 invalid_syntax ("?", 1);
2812 char *p
= read_buffer
;
2813 char *end
= read_buffer
+ read_buffer_size
;
2815 /* Nonzero if we saw an escape sequence specifying
2816 a multibyte character. */
2817 int force_multibyte
= 0;
2818 /* Nonzero if we saw an escape sequence specifying
2819 a single-byte character. */
2820 int force_singlebyte
= 0;
2824 while ((ch
= READCHAR
) >= 0
2827 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2829 int offset
= p
- read_buffer
;
2830 read_buffer
= (char *) xrealloc (read_buffer
,
2831 read_buffer_size
*= 2);
2832 p
= read_buffer
+ offset
;
2833 end
= read_buffer
+ read_buffer_size
;
2840 ch
= read_escape (readcharfun
, 1);
2842 /* CH is -1 if \ newline has just been seen */
2845 if (p
== read_buffer
)
2850 modifiers
= ch
& CHAR_MODIFIER_MASK
;
2851 ch
= ch
& ~CHAR_MODIFIER_MASK
;
2853 if (CHAR_BYTE8_P (ch
))
2854 force_singlebyte
= 1;
2855 else if (! ASCII_CHAR_P (ch
))
2856 force_multibyte
= 1;
2857 else /* i.e. ASCII_CHAR_P (ch) */
2859 /* Allow `\C- ' and `\C-?'. */
2860 if (modifiers
== CHAR_CTL
)
2863 ch
= 0, modifiers
= 0;
2865 ch
= 127, modifiers
= 0;
2867 if (modifiers
& CHAR_SHIFT
)
2869 /* Shift modifier is valid only with [A-Za-z]. */
2870 if (ch
>= 'A' && ch
<= 'Z')
2871 modifiers
&= ~CHAR_SHIFT
;
2872 else if (ch
>= 'a' && ch
<= 'z')
2873 ch
-= ('a' - 'A'), modifiers
&= ~CHAR_SHIFT
;
2876 if (modifiers
& CHAR_META
)
2878 /* Move the meta bit to the right place for a
2880 modifiers
&= ~CHAR_META
;
2881 ch
= BYTE8_TO_CHAR (ch
| 0x80);
2882 force_singlebyte
= 1;
2886 /* Any modifiers remaining are invalid. */
2888 error ("Invalid modifier in string");
2889 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
2893 p
+= CHAR_STRING (ch
, (unsigned char *) p
);
2894 if (CHAR_BYTE8_P (ch
))
2895 force_singlebyte
= 1;
2896 else if (! ASCII_CHAR_P (ch
))
2897 force_multibyte
= 1;
2903 end_of_file_error ();
2905 /* If purifying, and string starts with \ newline,
2906 return zero instead. This is for doc strings
2907 that we are really going to find in etc/DOC.nn.nn */
2908 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
2909 return make_number (0);
2911 if (force_multibyte
)
2912 /* READ_BUFFER already contains valid multibyte forms. */
2914 else if (force_singlebyte
)
2916 nchars
= str_as_unibyte ((unsigned char *) read_buffer
,
2918 p
= read_buffer
+ nchars
;
2922 /* Otherwise, READ_BUFFER contains only ASCII. */
2925 /* We want readchar_count to be the number of characters, not
2926 bytes. Hence we adjust for multibyte characters in the
2927 string. ... But it doesn't seem to be necessary, because
2928 READCHAR *does* read multibyte characters from buffers. */
2929 /* readchar_count -= (p - read_buffer) - nchars; */
2931 return make_pure_string (read_buffer
, nchars
, p
- read_buffer
,
2933 || (p
- read_buffer
!= nchars
)));
2934 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
2936 || (p
- read_buffer
!= nchars
)));
2941 int next_char
= READCHAR
;
2944 if (next_char
<= 040
2945 || (next_char
< 0200
2946 && (strchr ("\"';([#?`,", next_char
))))
2952 /* Otherwise, we fall through! Note that the atom-reading loop
2953 below will now loop at least once, assuring that we will not
2954 try to UNREAD two characters in a row. */
2958 if (c
<= 040) goto retry
;
2959 if (c
== 0x8a0) /* NBSP */
2962 char *p
= read_buffer
;
2966 char *end
= read_buffer
+ read_buffer_size
;
2970 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2972 int offset
= p
- read_buffer
;
2973 read_buffer
= (char *) xrealloc (read_buffer
,
2974 read_buffer_size
*= 2);
2975 p
= read_buffer
+ offset
;
2976 end
= read_buffer
+ read_buffer_size
;
2983 end_of_file_error ();
2988 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2993 && c
!= 0x8a0 /* NBSP */
2995 || !(strchr ("\"';()[]#`,", c
))));
2999 int offset
= p
- read_buffer
;
3000 read_buffer
= (char *) xrealloc (read_buffer
,
3001 read_buffer_size
*= 2);
3002 p
= read_buffer
+ offset
;
3003 end
= read_buffer
+ read_buffer_size
;
3010 if (!quoted
&& !uninterned_symbol
)
3014 if (*p1
== '+' || *p1
== '-') p1
++;
3015 /* Is it an integer? */
3018 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
3019 /* Integers can have trailing decimal points. */
3020 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
3022 /* It is an integer. */
3027 /* EMACS_INT n = atol (read_buffer); */
3028 char *endptr
= NULL
;
3029 EMACS_INT n
= (errno
= 0,
3030 strtol (read_buffer
, &endptr
, 10));
3031 if (errno
== ERANGE
&& endptr
)
3034 = Fcons (make_string (read_buffer
,
3035 endptr
- read_buffer
),
3037 xsignal (Qoverflow_error
, args
);
3039 return make_fixnum_or_float (n
);
3043 if (isfloat_string (read_buffer
, 0))
3045 /* Compute NaN and infinities using 0.0 in a variable,
3046 to cope with compilers that think they are smarter
3052 /* Negate the value ourselves. This treats 0, NaNs,
3053 and infinity properly on IEEE floating point hosts,
3054 and works around a common bug where atof ("-0.0")
3056 int negative
= read_buffer
[0] == '-';
3058 /* The only way p[-1] can be 'F' or 'N', after isfloat_string
3059 returns 1, is if the input ends in e+INF or e+NaN. */
3066 value
= zero
/ zero
;
3068 /* If that made a "negative" NaN, negate it. */
3072 union { double d
; char c
[sizeof (double)]; } u_data
, u_minus_zero
;
3075 u_minus_zero
.d
= - 0.0;
3076 for (i
= 0; i
< sizeof (double); i
++)
3077 if (u_data
.c
[i
] & u_minus_zero
.c
[i
])
3083 /* Now VALUE is a positive NaN. */
3086 value
= atof (read_buffer
+ negative
);
3090 return make_float (negative
? - value
: value
);
3094 Lisp_Object name
, result
;
3095 EMACS_INT nbytes
= p
- read_buffer
;
3098 ? multibyte_chars_in_text ((unsigned char *) read_buffer
,
3102 if (uninterned_symbol
&& ! NILP (Vpurify_flag
))
3103 name
= make_pure_string (read_buffer
, nchars
, nbytes
, multibyte
);
3105 name
= make_specified_string (read_buffer
, nchars
, nbytes
,multibyte
);
3106 result
= (uninterned_symbol
? Fmake_symbol (name
)
3107 : Fintern (name
, Qnil
));
3109 if (EQ (Vread_with_symbol_positions
, Qt
)
3110 || EQ (Vread_with_symbol_positions
, readcharfun
))
3111 Vread_symbol_positions_list
=
3112 /* Kind of a hack; this will probably fail if characters
3113 in the symbol name were escaped. Not really a big
3115 Fcons (Fcons (result
,
3116 make_number (readchar_count
3117 - XFASTINT (Flength (Fsymbol_name (result
))))),
3118 Vread_symbol_positions_list
);
3126 /* List of nodes we've seen during substitute_object_in_subtree. */
3127 static Lisp_Object seen_list
;
3130 substitute_object_in_subtree (Lisp_Object object
, Lisp_Object placeholder
)
3132 Lisp_Object check_object
;
3134 /* We haven't seen any objects when we start. */
3137 /* Make all the substitutions. */
3139 = substitute_object_recurse (object
, placeholder
, object
);
3141 /* Clear seen_list because we're done with it. */
3144 /* The returned object here is expected to always eq the
3146 if (!EQ (check_object
, object
))
3147 error ("Unexpected mutation error in reader");
3150 /* Feval doesn't get called from here, so no gc protection is needed. */
3151 #define SUBSTITUTE(get_val, set_val) \
3153 Lisp_Object old_value = get_val; \
3154 Lisp_Object true_value \
3155 = substitute_object_recurse (object, placeholder, \
3158 if (!EQ (old_value, true_value)) \
3165 substitute_object_recurse (Lisp_Object object
, Lisp_Object placeholder
, Lisp_Object subtree
)
3167 /* If we find the placeholder, return the target object. */
3168 if (EQ (placeholder
, subtree
))
3171 /* If we've been to this node before, don't explore it again. */
3172 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
3175 /* If this node can be the entry point to a cycle, remember that
3176 we've seen it. It can only be such an entry point if it was made
3177 by #n=, which means that we can find it as a value in
3179 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
3180 seen_list
= Fcons (subtree
, seen_list
);
3182 /* Recurse according to subtree's type.
3183 Every branch must return a Lisp_Object. */
3184 switch (XTYPE (subtree
))
3186 case Lisp_Vectorlike
:
3189 if (BOOL_VECTOR_P (subtree
))
3190 return subtree
; /* No sub-objects anyway. */
3191 else if (CHAR_TABLE_P (subtree
) || SUB_CHAR_TABLE_P (subtree
)
3192 || COMPILEDP (subtree
))
3193 length
= ASIZE (subtree
) & PSEUDOVECTOR_SIZE_MASK
;
3194 else if (VECTORP (subtree
))
3195 length
= ASIZE (subtree
);
3197 /* An unknown pseudovector may contain non-Lisp fields, so we
3198 can't just blindly traverse all its fields. We used to call
3199 `Flength' which signaled `sequencep', so I just preserved this
3201 wrong_type_argument (Qsequencep
, subtree
);
3203 for (i
= 0; i
< length
; i
++)
3204 SUBSTITUTE (AREF (subtree
, i
),
3205 ASET (subtree
, i
, true_value
));
3211 SUBSTITUTE (XCAR (subtree
),
3212 XSETCAR (subtree
, true_value
));
3213 SUBSTITUTE (XCDR (subtree
),
3214 XSETCDR (subtree
, true_value
));
3220 /* Check for text properties in each interval.
3221 substitute_in_interval contains part of the logic. */
3223 INTERVAL root_interval
= STRING_INTERVALS (subtree
);
3224 Lisp_Object arg
= Fcons (object
, placeholder
);
3226 traverse_intervals_noorder (root_interval
,
3227 &substitute_in_interval
, arg
);
3232 /* Other types don't recurse any further. */
3238 /* Helper function for substitute_object_recurse. */
3240 substitute_in_interval (INTERVAL interval
, Lisp_Object arg
)
3242 Lisp_Object object
= Fcar (arg
);
3243 Lisp_Object placeholder
= Fcdr (arg
);
3245 SUBSTITUTE (interval
->plist
, interval
->plist
= true_value
);
3256 isfloat_string (const char *cp
, int ignore_trailing
)
3259 const char *start
= cp
;
3262 if (*cp
== '+' || *cp
== '-')
3265 if (*cp
>= '0' && *cp
<= '9')
3268 while (*cp
>= '0' && *cp
<= '9')
3276 if (*cp
>= '0' && *cp
<= '9')
3279 while (*cp
>= '0' && *cp
<= '9')
3282 if (*cp
== 'e' || *cp
== 'E')
3286 if (*cp
== '+' || *cp
== '-')
3290 if (*cp
>= '0' && *cp
<= '9')
3293 while (*cp
>= '0' && *cp
<= '9')
3296 else if (cp
== start
)
3298 else if (cp
[-1] == '+' && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
3303 else if (cp
[-1] == '+' && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
3309 return ((ignore_trailing
3310 || *cp
== 0 || *cp
== ' ' || *cp
== '\t' || *cp
== '\n'
3311 || *cp
== '\r' || *cp
== '\f')
3312 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
3313 || state
== (DOT_CHAR
|TRAIL_INT
)
3314 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
3315 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
3316 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
3321 read_vector (Lisp_Object readcharfun
, int bytecodeflag
)
3325 register Lisp_Object
*ptr
;
3326 register Lisp_Object tem
, item
, vector
;
3327 register struct Lisp_Cons
*otem
;
3330 tem
= read_list (1, readcharfun
);
3331 len
= Flength (tem
);
3332 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
3334 size
= XVECTOR (vector
)->size
;
3335 ptr
= XVECTOR (vector
)->contents
;
3336 for (i
= 0; i
< size
; i
++)
3340 /* If `load-force-doc-strings' is t when reading a lazily-loaded
3341 bytecode object, the docstring containing the bytecode and
3342 constants values must be treated as unibyte and passed to
3343 Fread, to get the actual bytecode string and constants vector. */
3344 if (bytecodeflag
&& load_force_doc_strings
)
3346 if (i
== COMPILED_BYTECODE
)
3348 if (!STRINGP (item
))
3349 error ("Invalid byte code");
3351 /* Delay handling the bytecode slot until we know whether
3352 it is lazily-loaded (we can tell by whether the
3353 constants slot is nil). */
3354 ptr
[COMPILED_CONSTANTS
] = item
;
3357 else if (i
== COMPILED_CONSTANTS
)
3359 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
3363 /* Coerce string to unibyte (like string-as-unibyte,
3364 but without generating extra garbage and
3365 guaranteeing no change in the contents). */
3366 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
3367 STRING_SET_UNIBYTE (bytestr
);
3369 item
= Fread (Fcons (bytestr
, readcharfun
));
3371 error ("Invalid byte code");
3373 otem
= XCONS (item
);
3374 bytestr
= XCAR (item
);
3379 /* Now handle the bytecode slot. */
3380 ptr
[COMPILED_BYTECODE
] = read_pure
? Fpurecopy (bytestr
) : bytestr
;
3382 else if (i
== COMPILED_DOC_STRING
3384 && ! STRING_MULTIBYTE (item
))
3386 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
3387 item
= Fdecode_coding_string (item
, Qemacs_mule
, Qnil
, Qnil
);
3389 item
= Fstring_as_multibyte (item
);
3392 ptr
[i
] = read_pure
? Fpurecopy (item
) : item
;
3401 /* FLAG = 1 means check for ] to terminate rather than ) and .
3402 FLAG = -1 means check for starting with defun
3403 and make structure pure. */
3406 read_list (int flag
, register Lisp_Object readcharfun
)
3408 /* -1 means check next element for defun,
3409 0 means don't check,
3410 1 means already checked and found defun. */
3411 int defunflag
= flag
< 0 ? -1 : 0;
3412 Lisp_Object val
, tail
;
3413 register Lisp_Object elt
, tem
;
3414 struct gcpro gcpro1
, gcpro2
;
3415 /* 0 is the normal case.
3416 1 means this list is a doc reference; replace it with the number 0.
3417 2 means this list is a doc reference; replace it with the doc string. */
3418 int doc_reference
= 0;
3420 /* Initialize this to 1 if we are reading a list. */
3421 int first_in_list
= flag
<= 0;
3430 elt
= read1 (readcharfun
, &ch
, first_in_list
);
3435 /* While building, if the list starts with #$, treat it specially. */
3436 if (EQ (elt
, Vload_file_name
)
3438 && !NILP (Vpurify_flag
))
3440 if (NILP (Vdoc_file_name
))
3441 /* We have not yet called Snarf-documentation, so assume
3442 this file is described in the DOC-MM.NN file
3443 and Snarf-documentation will fill in the right value later.
3444 For now, replace the whole list with 0. */
3447 /* We have already called Snarf-documentation, so make a relative
3448 file name for this file, so it can be found properly
3449 in the installed Lisp directory.
3450 We don't use Fexpand_file_name because that would make
3451 the directory absolute now. */
3452 elt
= concat2 (build_string ("../lisp/"),
3453 Ffile_name_nondirectory (elt
));
3455 else if (EQ (elt
, Vload_file_name
)
3457 && load_force_doc_strings
)
3466 invalid_syntax (") or . in a vector", 18);
3474 XSETCDR (tail
, read0 (readcharfun
));
3476 val
= read0 (readcharfun
);
3477 read1 (readcharfun
, &ch
, 0);
3481 if (doc_reference
== 1)
3482 return make_number (0);
3483 if (doc_reference
== 2)
3485 /* Get a doc string from the file we are loading.
3486 If it's in saved_doc_string, get it from there.
3488 Here, we don't know if the string is a
3489 bytecode string or a doc string. As a
3490 bytecode string must be unibyte, we always
3491 return a unibyte string. If it is actually a
3492 doc string, caller must make it
3495 int pos
= XINT (XCDR (val
));
3496 /* Position is negative for user variables. */
3497 if (pos
< 0) pos
= -pos
;
3498 if (pos
>= saved_doc_string_position
3499 && pos
< (saved_doc_string_position
3500 + saved_doc_string_length
))
3502 int start
= pos
- saved_doc_string_position
;
3505 /* Process quoting with ^A,
3506 and find the end of the string,
3507 which is marked with ^_ (037). */
3508 for (from
= start
, to
= start
;
3509 saved_doc_string
[from
] != 037;)
3511 int c
= saved_doc_string
[from
++];
3514 c
= saved_doc_string
[from
++];
3516 saved_doc_string
[to
++] = c
;
3518 saved_doc_string
[to
++] = 0;
3520 saved_doc_string
[to
++] = 037;
3523 saved_doc_string
[to
++] = c
;
3526 return make_unibyte_string (saved_doc_string
+ start
,
3529 /* Look in prev_saved_doc_string the same way. */
3530 else if (pos
>= prev_saved_doc_string_position
3531 && pos
< (prev_saved_doc_string_position
3532 + prev_saved_doc_string_length
))
3534 int start
= pos
- prev_saved_doc_string_position
;
3537 /* Process quoting with ^A,
3538 and find the end of the string,
3539 which is marked with ^_ (037). */
3540 for (from
= start
, to
= start
;
3541 prev_saved_doc_string
[from
] != 037;)
3543 int c
= prev_saved_doc_string
[from
++];
3546 c
= prev_saved_doc_string
[from
++];
3548 prev_saved_doc_string
[to
++] = c
;
3550 prev_saved_doc_string
[to
++] = 0;
3552 prev_saved_doc_string
[to
++] = 037;
3555 prev_saved_doc_string
[to
++] = c
;
3558 return make_unibyte_string (prev_saved_doc_string
3563 return get_doc_string (val
, 1, 0);
3568 invalid_syntax (". in wrong context", 18);
3570 invalid_syntax ("] in a list", 11);
3572 tem
= (read_pure
&& flag
<= 0
3573 ? pure_cons (elt
, Qnil
)
3574 : Fcons (elt
, Qnil
));
3576 XSETCDR (tail
, tem
);
3581 defunflag
= EQ (elt
, Qdefun
);
3582 else if (defunflag
> 0)
3587 Lisp_Object initial_obarray
;
3589 /* oblookup stores the bucket number here, for the sake of Funintern. */
3591 int oblookup_last_bucket_number
;
3593 static int hash_string (const char *ptr
, int len
);
3595 /* Get an error if OBARRAY is not an obarray.
3596 If it is one, return it. */
3599 check_obarray (Lisp_Object obarray
)
3601 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3603 /* If Vobarray is now invalid, force it to be valid. */
3604 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3605 wrong_type_argument (Qvectorp
, obarray
);
3610 /* Intern the C string STR: return a symbol with that name,
3611 interned in the current obarray. */
3614 intern (const char *str
)
3617 int len
= strlen (str
);
3618 Lisp_Object obarray
;
3621 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3622 obarray
= check_obarray (obarray
);
3623 tem
= oblookup (obarray
, str
, len
, len
);
3626 return Fintern (make_string (str
, len
), obarray
);
3630 intern_c_string (const char *str
)
3633 int len
= strlen (str
);
3634 Lisp_Object obarray
;
3637 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3638 obarray
= check_obarray (obarray
);
3639 tem
= oblookup (obarray
, str
, len
, len
);
3643 if (NILP (Vpurify_flag
))
3644 /* Creating a non-pure string from a string literal not
3645 implemented yet. We could just use make_string here and live
3646 with the extra copy. */
3649 return Fintern (make_pure_c_string (str
), obarray
);
3652 /* Create an uninterned symbol with name STR. */
3655 make_symbol (const char *str
)
3657 int len
= strlen (str
);
3659 return Fmake_symbol (!NILP (Vpurify_flag
)
3660 ? make_pure_string (str
, len
, len
, 0)
3661 : make_string (str
, len
));
3664 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3665 doc
: /* Return the canonical symbol whose name is STRING.
3666 If there is none, one is created by this function and returned.
3667 A second optional argument specifies the obarray to use;
3668 it defaults to the value of `obarray'. */)
3669 (Lisp_Object string
, Lisp_Object obarray
)
3671 register Lisp_Object tem
, sym
, *ptr
;
3673 if (NILP (obarray
)) obarray
= Vobarray
;
3674 obarray
= check_obarray (obarray
);
3676 CHECK_STRING (string
);
3678 tem
= oblookup (obarray
, SSDATA (string
),
3681 if (!INTEGERP (tem
))
3684 if (!NILP (Vpurify_flag
))
3685 string
= Fpurecopy (string
);
3686 sym
= Fmake_symbol (string
);
3688 if (EQ (obarray
, initial_obarray
))
3689 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3691 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED
;
3693 if ((SREF (string
, 0) == ':')
3694 && EQ (obarray
, initial_obarray
))
3696 XSYMBOL (sym
)->constant
= 1;
3697 XSYMBOL (sym
)->redirect
= SYMBOL_PLAINVAL
;
3698 SET_SYMBOL_VAL (XSYMBOL (sym
), sym
);
3701 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
3703 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
3705 XSYMBOL (sym
)->next
= 0;
3710 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3711 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3712 NAME may be a string or a symbol. If it is a symbol, that exact
3713 symbol is searched for.
3714 A second optional argument specifies the obarray to use;
3715 it defaults to the value of `obarray'. */)
3716 (Lisp_Object name
, Lisp_Object obarray
)
3718 register Lisp_Object tem
, string
;
3720 if (NILP (obarray
)) obarray
= Vobarray
;
3721 obarray
= check_obarray (obarray
);
3723 if (!SYMBOLP (name
))
3725 CHECK_STRING (name
);
3729 string
= SYMBOL_NAME (name
);
3731 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3732 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3738 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3739 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3740 The value is t if a symbol was found and deleted, nil otherwise.
3741 NAME may be a string or a symbol. If it is a symbol, that symbol
3742 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3743 OBARRAY defaults to the value of the variable `obarray'. */)
3744 (Lisp_Object name
, Lisp_Object obarray
)
3746 register Lisp_Object string
, tem
;
3749 if (NILP (obarray
)) obarray
= Vobarray
;
3750 obarray
= check_obarray (obarray
);
3753 string
= SYMBOL_NAME (name
);
3756 CHECK_STRING (name
);
3760 tem
= oblookup (obarray
, SSDATA (string
),
3765 /* If arg was a symbol, don't delete anything but that symbol itself. */
3766 if (SYMBOLP (name
) && !EQ (name
, tem
))
3769 /* There are plenty of other symbols which will screw up the Emacs
3770 session if we unintern them, as well as even more ways to use
3771 `setq' or `fset' or whatnot to make the Emacs session
3772 unusable. Let's not go down this silly road. --Stef */
3773 /* if (EQ (tem, Qnil) || EQ (tem, Qt))
3774 error ("Attempt to unintern t or nil"); */
3776 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3778 hash
= oblookup_last_bucket_number
;
3780 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
3782 if (XSYMBOL (tem
)->next
)
3783 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
3785 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
3789 Lisp_Object tail
, following
;
3791 for (tail
= XVECTOR (obarray
)->contents
[hash
];
3792 XSYMBOL (tail
)->next
;
3795 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
3796 if (EQ (following
, tem
))
3798 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
3807 /* Return the symbol in OBARRAY whose names matches the string
3808 of SIZE characters (SIZE_BYTE bytes) at PTR.
3809 If there is no such symbol in OBARRAY, return nil.
3811 Also store the bucket number in oblookup_last_bucket_number. */
3814 oblookup (Lisp_Object obarray
, register const char *ptr
, EMACS_INT size
, EMACS_INT size_byte
)
3818 register Lisp_Object tail
;
3819 Lisp_Object bucket
, tem
;
3821 if (!VECTORP (obarray
)
3822 || (obsize
= XVECTOR (obarray
)->size
) == 0)
3824 obarray
= check_obarray (obarray
);
3825 obsize
= XVECTOR (obarray
)->size
;
3827 /* This is sometimes needed in the middle of GC. */
3828 obsize
&= ~ARRAY_MARK_FLAG
;
3829 hash
= hash_string (ptr
, size_byte
) % obsize
;
3830 bucket
= XVECTOR (obarray
)->contents
[hash
];
3831 oblookup_last_bucket_number
= hash
;
3832 if (EQ (bucket
, make_number (0)))
3834 else if (!SYMBOLP (bucket
))
3835 error ("Bad data in guts of obarray"); /* Like CADR error message */
3837 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
3839 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
3840 && SCHARS (SYMBOL_NAME (tail
)) == size
3841 && !memcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
3843 else if (XSYMBOL (tail
)->next
== 0)
3846 XSETINT (tem
, hash
);
3851 hash_string (const char *ptr
, int len
)
3853 register const char *p
= ptr
;
3854 register const char *end
= p
+ len
;
3855 register unsigned char c
;
3856 register int hash
= 0;
3861 if (c
>= 0140) c
-= 40;
3862 hash
= ((hash
<<3) + (hash
>>28) + c
);
3864 return hash
& 07777777777;
3868 map_obarray (Lisp_Object obarray
, void (*fn
) (Lisp_Object
, Lisp_Object
), Lisp_Object arg
)
3871 register Lisp_Object tail
;
3872 CHECK_VECTOR (obarray
);
3873 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
3875 tail
= XVECTOR (obarray
)->contents
[i
];
3880 if (XSYMBOL (tail
)->next
== 0)
3882 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
3888 mapatoms_1 (Lisp_Object sym
, Lisp_Object function
)
3890 call1 (function
, sym
);
3893 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
3894 doc
: /* Call FUNCTION on every symbol in OBARRAY.
3895 OBARRAY defaults to the value of `obarray'. */)
3896 (Lisp_Object function
, Lisp_Object obarray
)
3898 if (NILP (obarray
)) obarray
= Vobarray
;
3899 obarray
= check_obarray (obarray
);
3901 map_obarray (obarray
, mapatoms_1
, function
);
3905 #define OBARRAY_SIZE 1511
3910 Lisp_Object oblength
;
3912 XSETFASTINT (oblength
, OBARRAY_SIZE
);
3914 Vobarray
= Fmake_vector (oblength
, make_number (0));
3915 initial_obarray
= Vobarray
;
3916 staticpro (&initial_obarray
);
3918 Qunbound
= Fmake_symbol (make_pure_c_string ("unbound"));
3919 /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the
3920 NILP (Vpurify_flag) check in intern_c_string. */
3921 Qnil
= make_number (-1); Vpurify_flag
= make_number (1);
3922 Qnil
= intern_c_string ("nil");
3924 /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil,
3925 so those two need to be fixed manally. */
3926 SET_SYMBOL_VAL (XSYMBOL (Qunbound
), Qunbound
);
3927 XSYMBOL (Qunbound
)->function
= Qunbound
;
3928 XSYMBOL (Qunbound
)->plist
= Qnil
;
3929 /* XSYMBOL (Qnil)->function = Qunbound; */
3930 SET_SYMBOL_VAL (XSYMBOL (Qnil
), Qnil
);
3931 XSYMBOL (Qnil
)->constant
= 1;
3932 XSYMBOL (Qnil
)->plist
= Qnil
;
3934 Qt
= intern_c_string ("t");
3935 SET_SYMBOL_VAL (XSYMBOL (Qt
), Qt
);
3936 XSYMBOL (Qt
)->constant
= 1;
3938 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
3941 Qvariable_documentation
= intern_c_string ("variable-documentation");
3942 staticpro (&Qvariable_documentation
);
3944 read_buffer_size
= 100 + MAX_MULTIBYTE_LENGTH
;
3945 read_buffer
= (char *) xmalloc (read_buffer_size
);
3949 defsubr (struct Lisp_Subr
*sname
)
3952 sym
= intern_c_string (sname
->symbol_name
);
3953 XSETPVECTYPE (sname
, PVEC_SUBR
);
3954 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3957 #ifdef NOTDEF /* use fset in subr.el now */
3959 defalias (sname
, string
)
3960 struct Lisp_Subr
*sname
;
3964 sym
= intern (string
);
3965 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3969 /* Define an "integer variable"; a symbol whose value is forwarded to a
3970 C variable of type int. Sample call (munged w "xx" to fool make-docfile):
3971 DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */
3973 defvar_int (struct Lisp_Intfwd
*i_fwd
,
3974 const char *namestring
, EMACS_INT
*address
)
3977 sym
= intern_c_string (namestring
);
3978 i_fwd
->type
= Lisp_Fwd_Int
;
3979 i_fwd
->intvar
= address
;
3980 XSYMBOL (sym
)->declared_special
= 1;
3981 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
3982 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)i_fwd
);
3985 /* Similar but define a variable whose value is t if address contains 1,
3986 nil if address contains 0. */
3988 defvar_bool (struct Lisp_Boolfwd
*b_fwd
,
3989 const char *namestring
, int *address
)
3992 sym
= intern_c_string (namestring
);
3993 b_fwd
->type
= Lisp_Fwd_Bool
;
3994 b_fwd
->boolvar
= address
;
3995 XSYMBOL (sym
)->declared_special
= 1;
3996 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
3997 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)b_fwd
);
3998 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
4001 /* Similar but define a variable whose value is the Lisp Object stored
4002 at address. Two versions: with and without gc-marking of the C
4003 variable. The nopro version is used when that variable will be
4004 gc-marked for some other reason, since marking the same slot twice
4005 can cause trouble with strings. */
4007 defvar_lisp_nopro (struct Lisp_Objfwd
*o_fwd
,
4008 const char *namestring
, Lisp_Object
*address
)
4011 sym
= intern_c_string (namestring
);
4012 o_fwd
->type
= Lisp_Fwd_Obj
;
4013 o_fwd
->objvar
= address
;
4014 XSYMBOL (sym
)->declared_special
= 1;
4015 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4016 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)o_fwd
);
4020 defvar_lisp (struct Lisp_Objfwd
*o_fwd
,
4021 const char *namestring
, Lisp_Object
*address
)
4023 defvar_lisp_nopro (o_fwd
, namestring
, address
);
4024 staticpro (address
);
4028 /* Similar but define a variable whose value is the Lisp Object stored
4029 at a particular offset in the current kboard object. */
4032 defvar_kboard (struct Lisp_Kboard_Objfwd
*ko_fwd
,
4033 const char *namestring
, int offset
)
4036 sym
= intern_c_string (namestring
);
4037 ko_fwd
->type
= Lisp_Fwd_Kboard_Obj
;
4038 ko_fwd
->offset
= offset
;
4039 XSYMBOL (sym
)->declared_special
= 1;
4040 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4041 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)ko_fwd
);
4044 /* Record the value of load-path used at the start of dumping
4045 so we can see if the site changed it later during dumping. */
4046 static Lisp_Object dump_path
;
4052 int turn_off_warning
= 0;
4054 /* Compute the default load-path. */
4056 normal
= PATH_LOADSEARCH
;
4057 Vload_path
= decode_env_path (0, normal
);
4059 if (NILP (Vpurify_flag
))
4060 normal
= PATH_LOADSEARCH
;
4062 normal
= PATH_DUMPLOADSEARCH
;
4064 /* In a dumped Emacs, we normally have to reset the value of
4065 Vload_path from PATH_LOADSEARCH, since the value that was dumped
4066 uses ../lisp, instead of the path of the installed elisp
4067 libraries. However, if it appears that Vload_path was changed
4068 from the default before dumping, don't override that value. */
4071 if (! NILP (Fequal (dump_path
, Vload_path
)))
4073 Vload_path
= decode_env_path (0, normal
);
4074 if (!NILP (Vinstallation_directory
))
4076 Lisp_Object tem
, tem1
, sitelisp
;
4078 /* Remove site-lisp dirs from path temporarily and store
4079 them in sitelisp, then conc them on at the end so
4080 they're always first in path. */
4084 tem
= Fcar (Vload_path
);
4085 tem1
= Fstring_match (build_string ("site-lisp"),
4089 Vload_path
= Fcdr (Vload_path
);
4090 sitelisp
= Fcons (tem
, sitelisp
);
4096 /* Add to the path the lisp subdir of the
4097 installation dir, if it exists. */
4098 tem
= Fexpand_file_name (build_string ("lisp"),
4099 Vinstallation_directory
);
4100 tem1
= Ffile_exists_p (tem
);
4103 if (NILP (Fmember (tem
, Vload_path
)))
4105 turn_off_warning
= 1;
4106 Vload_path
= Fcons (tem
, Vload_path
);
4110 /* That dir doesn't exist, so add the build-time
4111 Lisp dirs instead. */
4112 Vload_path
= nconc2 (Vload_path
, dump_path
);
4114 /* Add leim under the installation dir, if it exists. */
4115 tem
= Fexpand_file_name (build_string ("leim"),
4116 Vinstallation_directory
);
4117 tem1
= Ffile_exists_p (tem
);
4120 if (NILP (Fmember (tem
, Vload_path
)))
4121 Vload_path
= Fcons (tem
, Vload_path
);
4124 /* Add site-lisp under the installation dir, if it exists. */
4125 tem
= Fexpand_file_name (build_string ("site-lisp"),
4126 Vinstallation_directory
);
4127 tem1
= Ffile_exists_p (tem
);
4130 if (NILP (Fmember (tem
, Vload_path
)))
4131 Vload_path
= Fcons (tem
, Vload_path
);
4134 /* If Emacs was not built in the source directory,
4135 and it is run from where it was built, add to load-path
4136 the lisp, leim and site-lisp dirs under that directory. */
4138 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
4142 tem
= Fexpand_file_name (build_string ("src/Makefile"),
4143 Vinstallation_directory
);
4144 tem1
= Ffile_exists_p (tem
);
4146 /* Don't be fooled if they moved the entire source tree
4147 AFTER dumping Emacs. If the build directory is indeed
4148 different from the source dir, src/Makefile.in and
4149 src/Makefile will not be found together. */
4150 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
4151 Vinstallation_directory
);
4152 tem2
= Ffile_exists_p (tem
);
4153 if (!NILP (tem1
) && NILP (tem2
))
4155 tem
= Fexpand_file_name (build_string ("lisp"),
4158 if (NILP (Fmember (tem
, Vload_path
)))
4159 Vload_path
= Fcons (tem
, Vload_path
);
4161 tem
= Fexpand_file_name (build_string ("leim"),
4164 if (NILP (Fmember (tem
, Vload_path
)))
4165 Vload_path
= Fcons (tem
, Vload_path
);
4167 tem
= Fexpand_file_name (build_string ("site-lisp"),
4170 if (NILP (Fmember (tem
, Vload_path
)))
4171 Vload_path
= Fcons (tem
, Vload_path
);
4174 if (!NILP (sitelisp
) && !no_site_lisp
)
4175 Vload_path
= nconc2 (Fnreverse (sitelisp
), Vload_path
);
4181 /* NORMAL refers to the lisp dir in the source directory. */
4182 /* We used to add ../lisp at the front here, but
4183 that caused trouble because it was copied from dump_path
4184 into Vload_path, above, when Vinstallation_directory was non-nil.
4185 It should be unnecessary. */
4186 Vload_path
= decode_env_path (0, normal
);
4187 dump_path
= Vload_path
;
4191 #if (!(defined (WINDOWSNT) || (defined (HAVE_NS))))
4192 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
4193 almost never correct, thereby causing a warning to be printed out that
4194 confuses users. Since PATH_LOADSEARCH is always overridden by the
4195 EMACSLOADPATH environment variable below, disable the warning on NT. */
4197 /* Warn if dirs in the *standard* path don't exist. */
4198 if (!turn_off_warning
)
4200 Lisp_Object path_tail
;
4202 for (path_tail
= Vload_path
;
4204 path_tail
= XCDR (path_tail
))
4206 Lisp_Object dirfile
;
4207 dirfile
= Fcar (path_tail
);
4208 if (STRINGP (dirfile
))
4210 dirfile
= Fdirectory_file_name (dirfile
);
4211 if (access (SSDATA (dirfile
), 0) < 0)
4212 dir_warning ("Warning: Lisp directory `%s' does not exist.\n",
4217 #endif /* !(WINDOWSNT || HAVE_NS) */
4219 /* If the EMACSLOADPATH environment variable is set, use its value.
4220 This doesn't apply if we're dumping. */
4222 if (NILP (Vpurify_flag
)
4223 && egetenv ("EMACSLOADPATH"))
4225 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
4229 load_in_progress
= 0;
4230 Vload_file_name
= Qnil
;
4232 load_descriptor_list
= Qnil
;
4234 Vstandard_input
= Qt
;
4235 Vloads_in_progress
= Qnil
;
4238 /* Print a warning, using format string FORMAT, that directory DIRNAME
4239 does not exist. Print it on stderr and put it in *Messages*. */
4242 dir_warning (const char *format
, Lisp_Object dirname
)
4245 = (char *) alloca (SCHARS (dirname
) + strlen (format
) + 5);
4247 fprintf (stderr
, format
, SDATA (dirname
));
4248 sprintf (buffer
, format
, SDATA (dirname
));
4249 /* Don't log the warning before we've initialized!! */
4251 message_dolog (buffer
, strlen (buffer
), 0, STRING_MULTIBYTE (dirname
));
4255 syms_of_lread (void)
4258 defsubr (&Sread_from_string
);
4260 defsubr (&Sintern_soft
);
4261 defsubr (&Sunintern
);
4262 defsubr (&Sget_load_suffixes
);
4264 defsubr (&Seval_buffer
);
4265 defsubr (&Seval_region
);
4266 defsubr (&Sread_char
);
4267 defsubr (&Sread_char_exclusive
);
4268 defsubr (&Sread_event
);
4269 defsubr (&Sget_file_char
);
4270 defsubr (&Smapatoms
);
4271 defsubr (&Slocate_file_internal
);
4273 DEFVAR_LISP ("obarray", Vobarray
,
4274 doc
: /* Symbol table for use by `intern' and `read'.
4275 It is a vector whose length ought to be prime for best results.
4276 The vector's contents don't make sense if examined from Lisp programs;
4277 to find all the symbols in an obarray, use `mapatoms'. */);
4279 DEFVAR_LISP ("values", Vvalues
,
4280 doc
: /* List of values of all expressions which were read, evaluated and printed.
4281 Order is reverse chronological. */);
4283 DEFVAR_LISP ("standard-input", Vstandard_input
,
4284 doc
: /* Stream for read to get input from.
4285 See documentation of `read' for possible values. */);
4286 Vstandard_input
= Qt
;
4288 DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions
,
4289 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
4291 If this variable is a buffer, then only forms read from that buffer
4292 will be added to `read-symbol-positions-list'.
4293 If this variable is t, then all read forms will be added.
4294 The effect of all other values other than nil are not currently
4295 defined, although they may be in the future.
4297 The positions are relative to the last call to `read' or
4298 `read-from-string'. It is probably a bad idea to set this variable at
4299 the toplevel; bind it instead. */);
4300 Vread_with_symbol_positions
= Qnil
;
4302 DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list
,
4303 doc
: /* A list mapping read symbols to their positions.
4304 This variable is modified during calls to `read' or
4305 `read-from-string', but only when `read-with-symbol-positions' is
4308 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
4309 CHAR-POSITION is an integer giving the offset of that occurrence of the
4310 symbol from the position where `read' or `read-from-string' started.
4312 Note that a symbol will appear multiple times in this list, if it was
4313 read multiple times. The list is in the same order as the symbols
4315 Vread_symbol_positions_list
= Qnil
;
4317 DEFVAR_LISP ("read-circle", Vread_circle
,
4318 doc
: /* Non-nil means read recursive structures using #N= and #N# syntax. */);
4321 DEFVAR_LISP ("load-path", Vload_path
,
4322 doc
: /* *List of directories to search for files to load.
4323 Each element is a string (directory name) or nil (try default directory).
4324 Initialized based on EMACSLOADPATH environment variable, if any,
4325 otherwise to default specified by file `epaths.h' when Emacs was built. */);
4327 DEFVAR_LISP ("load-suffixes", Vload_suffixes
,
4328 doc
: /* List of suffixes for (compiled or source) Emacs Lisp files.
4329 This list should not include the empty string.
4330 `load' and related functions try to append these suffixes, in order,
4331 to the specified file name if a Lisp suffix is allowed or required. */);
4332 Vload_suffixes
= Fcons (make_pure_c_string (".elc"),
4333 Fcons (make_pure_c_string (".el"), Qnil
));
4334 DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes
,
4335 doc
: /* List of suffixes that indicate representations of \
4337 This list should normally start with the empty string.
4339 Enabling Auto Compression mode appends the suffixes in
4340 `jka-compr-load-suffixes' to this list and disabling Auto Compression
4341 mode removes them again. `load' and related functions use this list to
4342 determine whether they should look for compressed versions of a file
4343 and, if so, which suffixes they should try to append to the file name
4344 in order to do so. However, if you want to customize which suffixes
4345 the loading functions recognize as compression suffixes, you should
4346 customize `jka-compr-load-suffixes' rather than the present variable. */);
4347 Vload_file_rep_suffixes
= Fcons (empty_unibyte_string
, Qnil
);
4349 DEFVAR_BOOL ("load-in-progress", load_in_progress
,
4350 doc
: /* Non-nil if inside of `load'. */);
4351 Qload_in_progress
= intern_c_string ("load-in-progress");
4352 staticpro (&Qload_in_progress
);
4354 DEFVAR_LISP ("after-load-alist", Vafter_load_alist
,
4355 doc
: /* An alist of expressions to be evalled when particular files are loaded.
4356 Each element looks like (REGEXP-OR-FEATURE FORMS...).
4358 REGEXP-OR-FEATURE is either a regular expression to match file names, or
4359 a symbol \(a feature name).
4361 When `load' is run and the file-name argument matches an element's
4362 REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol
4363 REGEXP-OR-FEATURE, the FORMS in the element are executed.
4365 An error in FORMS does not undo the load, but does prevent execution of
4366 the rest of the FORMS. */);
4367 Vafter_load_alist
= Qnil
;
4369 DEFVAR_LISP ("load-history", Vload_history
,
4370 doc
: /* Alist mapping loaded file names to symbols and features.
4371 Each alist element should be a list (FILE-NAME ENTRIES...), where
4372 FILE-NAME is the name of a file that has been loaded into Emacs.
4373 The file name is absolute and true (i.e. it doesn't contain symlinks).
4374 As an exception, one of the alist elements may have FILE-NAME nil,
4375 for symbols and features not associated with any file.
4377 The remaining ENTRIES in the alist element describe the functions and
4378 variables defined in that file, the features provided, and the
4379 features required. Each entry has the form `(provide . FEATURE)',
4380 `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)',
4381 `(defface . SYMBOL)', or `(t . SYMBOL)'. In addition, an entry `(t
4382 . SYMBOL)' may precede an entry `(defun . FUNCTION)', and means that
4383 SYMBOL was an autoload before this file redefined it as a function.
4385 During preloading, the file name recorded is relative to the main Lisp
4386 directory. These file names are converted to absolute at startup. */);
4387 Vload_history
= Qnil
;
4389 DEFVAR_LISP ("load-file-name", Vload_file_name
,
4390 doc
: /* Full name of file being loaded by `load'. */);
4391 Vload_file_name
= Qnil
;
4393 DEFVAR_LISP ("user-init-file", Vuser_init_file
,
4394 doc
: /* File name, including directory, of user's initialization file.
4395 If the file loaded had extension `.elc', and the corresponding source file
4396 exists, this variable contains the name of source file, suitable for use
4397 by functions like `custom-save-all' which edit the init file.
4398 While Emacs loads and evaluates the init file, value is the real name
4399 of the file, regardless of whether or not it has the `.elc' extension. */);
4400 Vuser_init_file
= Qnil
;
4402 DEFVAR_LISP ("current-load-list", Vcurrent_load_list
,
4403 doc
: /* Used for internal purposes by `load'. */);
4404 Vcurrent_load_list
= Qnil
;
4406 DEFVAR_LISP ("load-read-function", Vload_read_function
,
4407 doc
: /* Function used by `load' and `eval-region' for reading expressions.
4408 The default is nil, which means use the function `read'. */);
4409 Vload_read_function
= Qnil
;
4411 DEFVAR_LISP ("load-source-file-function", Vload_source_file_function
,
4412 doc
: /* Function called in `load' for loading an Emacs Lisp source file.
4413 This function is for doing code conversion before reading the source file.
4414 If nil, loading is done without any code conversion.
4415 Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where
4416 FULLNAME is the full name of FILE.
4417 See `load' for the meaning of the remaining arguments. */);
4418 Vload_source_file_function
= Qnil
;
4420 DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings
,
4421 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
4422 This is useful when the file being loaded is a temporary copy. */);
4423 load_force_doc_strings
= 0;
4425 DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte
,
4426 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
4427 This is normally bound by `load' and `eval-buffer' to control `read',
4428 and is not meant for users to change. */);
4429 load_convert_to_unibyte
= 0;
4431 DEFVAR_LISP ("source-directory", Vsource_directory
,
4432 doc
: /* Directory in which Emacs sources were found when Emacs was built.
4433 You cannot count on them to still be there! */);
4435 = Fexpand_file_name (build_string ("../"),
4436 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
4438 DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list
,
4439 doc
: /* List of files that were preloaded (when dumping Emacs). */);
4440 Vpreloaded_file_list
= Qnil
;
4442 DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars
,
4443 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
4444 Vbyte_boolean_vars
= Qnil
;
4446 DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries
,
4447 doc
: /* Non-nil means load dangerous compiled Lisp files.
4448 Some versions of XEmacs use different byte codes than Emacs. These
4449 incompatible byte codes can make Emacs crash when it tries to execute
4451 load_dangerous_libraries
= 0;
4453 DEFVAR_BOOL ("force-load-messages", force_load_messages
,
4454 doc
: /* Non-nil means force printing messages when loading Lisp files.
4455 This overrides the value of the NOMESSAGE argument to `load'. */);
4456 force_load_messages
= 0;
4458 DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp
,
4459 doc
: /* Regular expression matching safe to load compiled Lisp files.
4460 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
4461 from the file, and matches them against this regular expression.
4462 When the regular expression matches, the file is considered to be safe
4463 to load. See also `load-dangerous-libraries'. */);
4464 Vbytecomp_version_regexp
4465 = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
4467 Qlexical_binding
= intern ("lexical-binding");
4468 staticpro (&Qlexical_binding
);
4469 DEFVAR_LISP ("lexical-binding", Vlexical_binding
,
4470 doc
: /* If non-nil, use lexical binding when evaluating code.
4471 This only applies to code evaluated by `eval-buffer' and `eval-region'.
4472 This variable is automatically set from the file variables of an interpreted
4473 lisp file read using `load'. */);
4474 Fmake_variable_buffer_local (Qlexical_binding
);
4476 DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list
,
4477 doc
: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
4478 Veval_buffer_list
= Qnil
;
4480 DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes
,
4481 doc
: /* Set to non-nil when `read' encounters an old-style backquote. */);
4482 Vold_style_backquotes
= Qnil
;
4483 Qold_style_backquotes
= intern_c_string ("old-style-backquotes");
4484 staticpro (&Qold_style_backquotes
);
4486 /* Vsource_directory was initialized in init_lread. */
4488 load_descriptor_list
= Qnil
;
4489 staticpro (&load_descriptor_list
);
4491 Qcurrent_load_list
= intern_c_string ("current-load-list");
4492 staticpro (&Qcurrent_load_list
);
4494 Qstandard_input
= intern_c_string ("standard-input");
4495 staticpro (&Qstandard_input
);
4497 Qread_char
= intern_c_string ("read-char");
4498 staticpro (&Qread_char
);
4500 Qget_file_char
= intern_c_string ("get-file-char");
4501 staticpro (&Qget_file_char
);
4503 Qget_emacs_mule_file_char
= intern_c_string ("get-emacs-mule-file-char");
4504 staticpro (&Qget_emacs_mule_file_char
);
4506 Qload_force_doc_strings
= intern_c_string ("load-force-doc-strings");
4507 staticpro (&Qload_force_doc_strings
);
4509 Qbackquote
= intern_c_string ("`");
4510 staticpro (&Qbackquote
);
4511 Qcomma
= intern_c_string (",");
4512 staticpro (&Qcomma
);
4513 Qcomma_at
= intern_c_string (",@");
4514 staticpro (&Qcomma_at
);
4515 Qcomma_dot
= intern_c_string (",.");
4516 staticpro (&Qcomma_dot
);
4518 Qinhibit_file_name_operation
= intern_c_string ("inhibit-file-name-operation");
4519 staticpro (&Qinhibit_file_name_operation
);
4521 Qascii_character
= intern_c_string ("ascii-character");
4522 staticpro (&Qascii_character
);
4524 Qfunction
= intern_c_string ("function");
4525 staticpro (&Qfunction
);
4527 Qload
= intern_c_string ("load");
4530 Qload_file_name
= intern_c_string ("load-file-name");
4531 staticpro (&Qload_file_name
);
4533 Qeval_buffer_list
= intern_c_string ("eval-buffer-list");
4534 staticpro (&Qeval_buffer_list
);
4536 Qfile_truename
= intern_c_string ("file-truename");
4537 staticpro (&Qfile_truename
) ;
4539 Qdir_ok
= intern_c_string ("dir-ok");
4540 staticpro (&Qdir_ok
);
4542 Qdo_after_load_evaluation
= intern_c_string ("do-after-load-evaluation");
4543 staticpro (&Qdo_after_load_evaluation
) ;
4545 staticpro (&dump_path
);
4547 staticpro (&read_objects
);
4548 read_objects
= Qnil
;
4549 staticpro (&seen_list
);
4552 Vloads_in_progress
= Qnil
;
4553 staticpro (&Vloads_in_progress
);
4555 Qhash_table
= intern_c_string ("hash-table");
4556 staticpro (&Qhash_table
);
4557 Qdata
= intern_c_string ("data");
4559 Qtest
= intern_c_string ("test");
4561 Qsize
= intern_c_string ("size");
4563 Qweakness
= intern_c_string ("weakness");
4564 staticpro (&Qweakness
);
4565 Qrehash_size
= intern_c_string ("rehash-size");
4566 staticpro (&Qrehash_size
);
4567 Qrehash_threshold
= intern_c_string ("rehash-threshold");
4568 staticpro (&Qrehash_threshold
);