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 bytepos
= BUF_PT_BYTE (b
);
376 if (! NILP (BVAR (b
, enable_multibyte_characters
)))
377 BUF_DEC_POS (b
, bytepos
);
381 BUF_PT_BYTE (b
) = 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
))) && (++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
*b
= XBUFFER (readcharfun
);
1791 if (BUF_PT (b
) == BUF_ZV (b
))
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 int count
= SPECPDL_INDEX ();
1893 Lisp_Object tem
, cbuf
;
1895 cbuf
= Fcurrent_buffer ();
1897 if (NILP (printflag
))
1901 specbind (Qstandard_output
, tem
);
1902 specbind (Qeval_buffer_list
, Fcons (cbuf
, Veval_buffer_list
));
1904 /* readevalloop calls functions which check the type of start and end. */
1905 readevalloop (cbuf
, 0, BVAR (XBUFFER (cbuf
), filename
),
1906 !NILP (printflag
), Qnil
, read_function
,
1909 return unbind_to (count
, Qnil
);
1913 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
1914 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
1915 If STREAM is nil, use the value of `standard-input' (which see).
1916 STREAM or the value of `standard-input' may be:
1917 a buffer (read from point and advance it)
1918 a marker (read from where it points and advance it)
1919 a function (call it with no arguments for each character,
1920 call it with a char as argument to push a char back)
1921 a string (takes text from string, starting at the beginning)
1922 t (read text line using minibuffer and use it, or read from
1923 standard input in batch mode). */)
1924 (Lisp_Object stream
)
1927 stream
= Vstandard_input
;
1928 if (EQ (stream
, Qt
))
1929 stream
= Qread_char
;
1930 if (EQ (stream
, Qread_char
))
1931 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
1933 return read_internal_start (stream
, Qnil
, Qnil
);
1936 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
1937 doc
: /* Read one Lisp expression which is represented as text by STRING.
1938 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1939 START and END optionally delimit a substring of STRING from which to read;
1940 they default to 0 and (length STRING) respectively. */)
1941 (Lisp_Object string
, Lisp_Object start
, Lisp_Object end
)
1944 CHECK_STRING (string
);
1945 /* read_internal_start sets read_from_string_index. */
1946 ret
= read_internal_start (string
, start
, end
);
1947 return Fcons (ret
, make_number (read_from_string_index
));
1950 /* Function to set up the global context we need in toplevel read
1953 read_internal_start (Lisp_Object stream
, Lisp_Object start
, Lisp_Object end
)
1954 /* start, end only used when stream is a string. */
1959 new_backquote_flag
= 0;
1960 read_objects
= Qnil
;
1961 if (EQ (Vread_with_symbol_positions
, Qt
)
1962 || EQ (Vread_with_symbol_positions
, stream
))
1963 Vread_symbol_positions_list
= Qnil
;
1965 if (STRINGP (stream
)
1966 || ((CONSP (stream
) && STRINGP (XCAR (stream
)))))
1968 EMACS_INT startval
, endval
;
1971 if (STRINGP (stream
))
1974 string
= XCAR (stream
);
1977 endval
= SCHARS (string
);
1981 endval
= XINT (end
);
1982 if (endval
< 0 || endval
> SCHARS (string
))
1983 args_out_of_range (string
, end
);
1990 CHECK_NUMBER (start
);
1991 startval
= XINT (start
);
1992 if (startval
< 0 || startval
> endval
)
1993 args_out_of_range (string
, start
);
1995 read_from_string_index
= startval
;
1996 read_from_string_index_byte
= string_char_to_byte (string
, startval
);
1997 read_from_string_limit
= endval
;
2000 retval
= read0 (stream
);
2001 if (EQ (Vread_with_symbol_positions
, Qt
)
2002 || EQ (Vread_with_symbol_positions
, stream
))
2003 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
2008 /* Signal Qinvalid_read_syntax error.
2009 S is error string of length N (if > 0) */
2012 invalid_syntax (const char *s
, int n
)
2016 xsignal1 (Qinvalid_read_syntax
, make_string (s
, n
));
2020 /* Use this for recursive reads, in contexts where internal tokens
2024 read0 (Lisp_Object readcharfun
)
2026 register Lisp_Object val
;
2029 val
= read1 (readcharfun
, &c
, 0);
2033 xsignal1 (Qinvalid_read_syntax
,
2034 Fmake_string (make_number (1), make_number (c
)));
2037 static int read_buffer_size
;
2038 static char *read_buffer
;
2040 /* Read a \-escape sequence, assuming we already read the `\'.
2041 If the escape sequence forces unibyte, return eight-bit char. */
2044 read_escape (Lisp_Object readcharfun
, int stringp
)
2046 register int c
= READCHAR
;
2047 /* \u allows up to four hex digits, \U up to eight. Default to the
2048 behavior for \u, and change this value in the case that \U is seen. */
2049 int unicode_hex_count
= 4;
2054 end_of_file_error ();
2084 error ("Invalid escape character syntax");
2087 c
= read_escape (readcharfun
, 0);
2088 return c
| meta_modifier
;
2093 error ("Invalid escape character syntax");
2096 c
= read_escape (readcharfun
, 0);
2097 return c
| shift_modifier
;
2102 error ("Invalid escape character syntax");
2105 c
= read_escape (readcharfun
, 0);
2106 return c
| hyper_modifier
;
2111 error ("Invalid escape character syntax");
2114 c
= read_escape (readcharfun
, 0);
2115 return c
| alt_modifier
;
2119 if (stringp
|| c
!= '-')
2126 c
= read_escape (readcharfun
, 0);
2127 return c
| super_modifier
;
2132 error ("Invalid escape character syntax");
2136 c
= read_escape (readcharfun
, 0);
2137 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
2138 return 0177 | (c
& CHAR_MODIFIER_MASK
);
2139 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
2140 return c
| ctrl_modifier
;
2141 /* ASCII control chars are made from letters (both cases),
2142 as well as the non-letters within 0100...0137. */
2143 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
2144 return (c
& (037 | ~0177));
2145 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
2146 return (c
& (037 | ~0177));
2148 return c
| ctrl_modifier
;
2158 /* An octal escape, as in ANSI C. */
2160 register int i
= c
- '0';
2161 register int count
= 0;
2164 if ((c
= READCHAR
) >= '0' && c
<= '7')
2176 if (i
>= 0x80 && i
< 0x100)
2177 i
= BYTE8_TO_CHAR (i
);
2182 /* A hex escape, as in ANSI C. */
2189 if (c
>= '0' && c
<= '9')
2194 else if ((c
>= 'a' && c
<= 'f')
2195 || (c
>= 'A' && c
<= 'F'))
2198 if (c
>= 'a' && c
<= 'f')
2211 if (count
< 3 && i
>= 0x80)
2212 return BYTE8_TO_CHAR (i
);
2217 /* Post-Unicode-2.0: Up to eight hex chars. */
2218 unicode_hex_count
= 8;
2221 /* A Unicode escape. We only permit them in strings and characters,
2222 not arbitrarily in the source code, as in some other languages. */
2227 while (++count
<= unicode_hex_count
)
2230 /* isdigit and isalpha may be locale-specific, which we don't
2232 if (c
>= '0' && c
<= '9') i
= (i
<< 4) + (c
- '0');
2233 else if (c
>= 'a' && c
<= 'f') i
= (i
<< 4) + (c
- 'a') + 10;
2234 else if (c
>= 'A' && c
<= 'F') i
= (i
<< 4) + (c
- 'A') + 10;
2237 error ("Non-hex digit used for Unicode escape");
2242 error ("Non-Unicode character: 0x%x", i
);
2251 /* Read an integer in radix RADIX using READCHARFUN to read
2252 characters. RADIX must be in the interval [2..36]; if it isn't, a
2253 read error is signaled . Value is the integer read. Signals an
2254 error if encountering invalid read syntax or if RADIX is out of
2258 read_integer (Lisp_Object readcharfun
, int radix
)
2260 int ndigits
= 0, invalid_p
, c
, sign
= 0;
2261 /* We use a floating point number because */
2264 if (radix
< 2 || radix
> 36)
2268 number
= ndigits
= invalid_p
= 0;
2284 if (c
>= '0' && c
<= '9')
2286 else if (c
>= 'a' && c
<= 'z')
2287 digit
= c
- 'a' + 10;
2288 else if (c
>= 'A' && c
<= 'Z')
2289 digit
= c
- 'A' + 10;
2296 if (digit
< 0 || digit
>= radix
)
2299 number
= radix
* number
+ digit
;
2305 if (ndigits
== 0 || invalid_p
)
2308 sprintf (buf
, "integer, radix %d", radix
);
2309 invalid_syntax (buf
, 0);
2312 return make_fixnum_or_float (sign
* number
);
2316 /* If the next token is ')' or ']' or '.', we store that character
2317 in *PCH and the return value is not interesting. Else, we store
2318 zero in *PCH and we read and return one lisp object.
2320 FIRST_IN_LIST is nonzero if this is the first element of a list. */
2323 read1 (register Lisp_Object readcharfun
, int *pch
, int first_in_list
)
2326 int uninterned_symbol
= 0;
2334 c
= READCHAR_REPORT_MULTIBYTE (&multibyte
);
2336 end_of_file_error ();
2341 return read_list (0, readcharfun
);
2344 return read_vector (readcharfun
, 0);
2360 /* Accept extended format for hashtables (extensible to
2362 #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */
2363 Lisp_Object tmp
= read_list (0, readcharfun
);
2364 Lisp_Object head
= CAR_SAFE (tmp
);
2365 Lisp_Object data
= Qnil
;
2366 Lisp_Object val
= Qnil
;
2367 /* The size is 2 * number of allowed keywords to
2369 Lisp_Object params
[10];
2371 Lisp_Object key
= Qnil
;
2372 int param_count
= 0;
2374 if (!EQ (head
, Qhash_table
))
2375 error ("Invalid extended read marker at head of #s list "
2376 "(only hash-table allowed)");
2378 tmp
= CDR_SAFE (tmp
);
2380 /* This is repetitive but fast and simple. */
2381 params
[param_count
] = QCsize
;
2382 params
[param_count
+1] = Fplist_get (tmp
, Qsize
);
2383 if (!NILP (params
[param_count
+ 1]))
2386 params
[param_count
] = QCtest
;
2387 params
[param_count
+1] = Fplist_get (tmp
, Qtest
);
2388 if (!NILP (params
[param_count
+ 1]))
2391 params
[param_count
] = QCweakness
;
2392 params
[param_count
+1] = Fplist_get (tmp
, Qweakness
);
2393 if (!NILP (params
[param_count
+ 1]))
2396 params
[param_count
] = QCrehash_size
;
2397 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_size
);
2398 if (!NILP (params
[param_count
+ 1]))
2401 params
[param_count
] = QCrehash_threshold
;
2402 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_threshold
);
2403 if (!NILP (params
[param_count
+ 1]))
2406 /* This is the hashtable data. */
2407 data
= Fplist_get (tmp
, Qdata
);
2409 /* Now use params to make a new hashtable and fill it. */
2410 ht
= Fmake_hash_table (param_count
, params
);
2412 while (CONSP (data
))
2417 error ("Odd number of elements in hashtable data");
2420 Fputhash (key
, val
, ht
);
2426 invalid_syntax ("#", 1);
2434 tmp
= read_vector (readcharfun
, 0);
2435 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
)
2436 error ("Invalid size char-table");
2437 XSETPVECTYPE (XVECTOR (tmp
), PVEC_CHAR_TABLE
);
2448 tmp
= read_vector (readcharfun
, 0);
2449 if (!INTEGERP (AREF (tmp
, 0)))
2450 error ("Invalid depth in char-table");
2451 depth
= XINT (AREF (tmp
, 0));
2452 if (depth
< 1 || depth
> 3)
2453 error ("Invalid depth in char-table");
2454 size
= XVECTOR (tmp
)->size
- 2;
2455 if (chartab_size
[depth
] != size
)
2456 error ("Invalid size char-table");
2457 XSETPVECTYPE (XVECTOR (tmp
), PVEC_SUB_CHAR_TABLE
);
2460 invalid_syntax ("#^^", 3);
2462 invalid_syntax ("#^", 2);
2467 length
= read1 (readcharfun
, pch
, first_in_list
);
2471 Lisp_Object tmp
, val
;
2473 = ((XFASTINT (length
) + BOOL_VECTOR_BITS_PER_CHAR
- 1)
2474 / BOOL_VECTOR_BITS_PER_CHAR
);
2477 tmp
= read1 (readcharfun
, pch
, first_in_list
);
2478 if (STRING_MULTIBYTE (tmp
)
2479 || (size_in_chars
!= SCHARS (tmp
)
2480 /* We used to print 1 char too many
2481 when the number of bits was a multiple of 8.
2482 Accept such input in case it came from an old
2484 && ! (XFASTINT (length
)
2485 == (SCHARS (tmp
) - 1) * BOOL_VECTOR_BITS_PER_CHAR
)))
2486 invalid_syntax ("#&...", 5);
2488 val
= Fmake_bool_vector (length
, Qnil
);
2489 memcpy (XBOOL_VECTOR (val
)->data
, SDATA (tmp
), size_in_chars
);
2490 /* Clear the extraneous bits in the last byte. */
2491 if (XINT (length
) != size_in_chars
* BOOL_VECTOR_BITS_PER_CHAR
)
2492 XBOOL_VECTOR (val
)->data
[size_in_chars
- 1]
2493 &= (1 << (XINT (length
) % BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2496 invalid_syntax ("#&...", 5);
2500 /* Accept compiled functions at read-time so that we don't have to
2501 build them using function calls. */
2503 tmp
= read_vector (readcharfun
, 1);
2504 return Fmake_byte_code (XVECTOR (tmp
)->size
,
2505 XVECTOR (tmp
)->contents
);
2510 struct gcpro gcpro1
;
2513 /* Read the string itself. */
2514 tmp
= read1 (readcharfun
, &ch
, 0);
2515 if (ch
!= 0 || !STRINGP (tmp
))
2516 invalid_syntax ("#", 1);
2518 /* Read the intervals and their properties. */
2521 Lisp_Object beg
, end
, plist
;
2523 beg
= read1 (readcharfun
, &ch
, 0);
2528 end
= read1 (readcharfun
, &ch
, 0);
2530 plist
= read1 (readcharfun
, &ch
, 0);
2532 invalid_syntax ("Invalid string property list", 0);
2533 Fset_text_properties (beg
, end
, plist
, tmp
);
2539 /* #@NUMBER is used to skip NUMBER following characters.
2540 That's used in .elc files to skip over doc strings
2541 and function definitions. */
2547 /* Read a decimal integer. */
2548 while ((c
= READCHAR
) >= 0
2549 && c
>= '0' && c
<= '9')
2557 if (load_force_doc_strings
2558 && (EQ (readcharfun
, Qget_file_char
)
2559 || EQ (readcharfun
, Qget_emacs_mule_file_char
)))
2561 /* If we are supposed to force doc strings into core right now,
2562 record the last string that we skipped,
2563 and record where in the file it comes from. */
2565 /* But first exchange saved_doc_string
2566 with prev_saved_doc_string, so we save two strings. */
2568 char *temp
= saved_doc_string
;
2569 int temp_size
= saved_doc_string_size
;
2570 file_offset temp_pos
= saved_doc_string_position
;
2571 int temp_len
= saved_doc_string_length
;
2573 saved_doc_string
= prev_saved_doc_string
;
2574 saved_doc_string_size
= prev_saved_doc_string_size
;
2575 saved_doc_string_position
= prev_saved_doc_string_position
;
2576 saved_doc_string_length
= prev_saved_doc_string_length
;
2578 prev_saved_doc_string
= temp
;
2579 prev_saved_doc_string_size
= temp_size
;
2580 prev_saved_doc_string_position
= temp_pos
;
2581 prev_saved_doc_string_length
= temp_len
;
2584 if (saved_doc_string_size
== 0)
2586 saved_doc_string_size
= nskip
+ 100;
2587 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
2589 if (nskip
> saved_doc_string_size
)
2591 saved_doc_string_size
= nskip
+ 100;
2592 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
2593 saved_doc_string_size
);
2596 saved_doc_string_position
= file_tell (instream
);
2598 /* Copy that many characters into saved_doc_string. */
2599 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2600 saved_doc_string
[i
] = c
= READCHAR
;
2602 saved_doc_string_length
= i
;
2606 /* Skip that many characters. */
2607 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2616 /* #! appears at the beginning of an executable file.
2617 Skip the first line. */
2618 while (c
!= '\n' && c
>= 0)
2623 return Vload_file_name
;
2625 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
2626 /* #:foo is the uninterned symbol named foo. */
2629 uninterned_symbol
= 1;
2633 /* Reader forms that can reuse previously read objects. */
2634 if (c
>= '0' && c
<= '9')
2639 /* Read a non-negative integer. */
2640 while (c
>= '0' && c
<= '9')
2646 /* #n=object returns object, but associates it with n for #n#. */
2647 if (c
== '=' && !NILP (Vread_circle
))
2649 /* Make a placeholder for #n# to use temporarily */
2650 Lisp_Object placeholder
;
2653 placeholder
= Fcons (Qnil
, Qnil
);
2654 cell
= Fcons (make_number (n
), placeholder
);
2655 read_objects
= Fcons (cell
, read_objects
);
2657 /* Read the object itself. */
2658 tem
= read0 (readcharfun
);
2660 /* Now put it everywhere the placeholder was... */
2661 substitute_object_in_subtree (tem
, placeholder
);
2663 /* ...and #n# will use the real value from now on. */
2664 Fsetcdr (cell
, tem
);
2668 /* #n# returns a previously read object. */
2669 if (c
== '#' && !NILP (Vread_circle
))
2671 tem
= Fassq (make_number (n
), read_objects
);
2674 /* Fall through to error message. */
2676 else if (c
== 'r' || c
== 'R')
2677 return read_integer (readcharfun
, n
);
2679 /* Fall through to error message. */
2681 else if (c
== 'x' || c
== 'X')
2682 return read_integer (readcharfun
, 16);
2683 else if (c
== 'o' || c
== 'O')
2684 return read_integer (readcharfun
, 8);
2685 else if (c
== 'b' || c
== 'B')
2686 return read_integer (readcharfun
, 2);
2689 invalid_syntax ("#", 1);
2692 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2697 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
2702 int next_char
= READCHAR
;
2704 /* Transition from old-style to new-style:
2705 If we see "(`" it used to mean old-style, which usually works
2706 fine because ` should almost never appear in such a position
2707 for new-style. But occasionally we need "(`" to mean new
2708 style, so we try to distinguish the two by the fact that we
2709 can either write "( `foo" or "(` foo", where the first
2710 intends to use new-style whereas the second intends to use
2711 old-style. For Emacs-25, we should completely remove this
2712 first_in_list exception (old-style can still be obtained via
2714 if (!new_backquote_flag
&& first_in_list
&& next_char
== ' ')
2716 Vold_style_backquotes
= Qt
;
2723 new_backquote_flag
++;
2724 value
= read0 (readcharfun
);
2725 new_backquote_flag
--;
2727 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
2732 int next_char
= READCHAR
;
2734 /* Transition from old-style to new-style:
2735 It used to be impossible to have a new-style , other than within
2736 a new-style `. This is sufficient when ` and , are used in the
2737 normal way, but ` and , can also appear in args to macros that
2738 will not interpret them in the usual way, in which case , may be
2739 used without any ` anywhere near.
2740 So we now use the same heuristic as for backquote: old-style
2741 unquotes are only recognized when first on a list, and when
2742 followed by a space.
2743 Because it's more difficult to peak 2 chars ahead, a new-style
2744 ,@ can still not be used outside of a `, unless it's in the middle
2746 if (new_backquote_flag
2748 || (next_char
!= ' ' && next_char
!= '@'))
2750 Lisp_Object comma_type
= Qnil
;
2755 comma_type
= Qcomma_at
;
2757 comma_type
= Qcomma_dot
;
2760 if (ch
>= 0) UNREAD (ch
);
2761 comma_type
= Qcomma
;
2764 value
= read0 (readcharfun
);
2765 return Fcons (comma_type
, Fcons (value
, Qnil
));
2769 Vold_style_backquotes
= Qt
;
2781 end_of_file_error ();
2783 /* Accept `single space' syntax like (list ? x) where the
2784 whitespace character is SPC or TAB.
2785 Other literal whitespace like NL, CR, and FF are not accepted,
2786 as there are well-established escape sequences for these. */
2787 if (c
== ' ' || c
== '\t')
2788 return make_number (c
);
2791 c
= read_escape (readcharfun
, 0);
2792 modifiers
= c
& CHAR_MODIFIER_MASK
;
2793 c
&= ~CHAR_MODIFIER_MASK
;
2794 if (CHAR_BYTE8_P (c
))
2795 c
= CHAR_TO_BYTE8 (c
);
2798 next_char
= READCHAR
;
2799 ok
= (next_char
<= 040
2800 || (next_char
< 0200
2801 && (strchr ("\"';()[]#?`,.", next_char
))));
2804 return make_number (c
);
2806 invalid_syntax ("?", 1);
2811 char *p
= read_buffer
;
2812 char *end
= read_buffer
+ read_buffer_size
;
2814 /* Nonzero if we saw an escape sequence specifying
2815 a multibyte character. */
2816 int force_multibyte
= 0;
2817 /* Nonzero if we saw an escape sequence specifying
2818 a single-byte character. */
2819 int force_singlebyte
= 0;
2823 while ((c
= READCHAR
) >= 0
2826 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2828 int offset
= p
- read_buffer
;
2829 read_buffer
= (char *) xrealloc (read_buffer
,
2830 read_buffer_size
*= 2);
2831 p
= read_buffer
+ offset
;
2832 end
= read_buffer
+ read_buffer_size
;
2839 c
= read_escape (readcharfun
, 1);
2841 /* C is -1 if \ newline has just been seen */
2844 if (p
== read_buffer
)
2849 modifiers
= c
& CHAR_MODIFIER_MASK
;
2850 c
= c
& ~CHAR_MODIFIER_MASK
;
2852 if (CHAR_BYTE8_P (c
))
2853 force_singlebyte
= 1;
2854 else if (! ASCII_CHAR_P (c
))
2855 force_multibyte
= 1;
2856 else /* i.e. ASCII_CHAR_P (c) */
2858 /* Allow `\C- ' and `\C-?'. */
2859 if (modifiers
== CHAR_CTL
)
2862 c
= 0, modifiers
= 0;
2864 c
= 127, modifiers
= 0;
2866 if (modifiers
& CHAR_SHIFT
)
2868 /* Shift modifier is valid only with [A-Za-z]. */
2869 if (c
>= 'A' && c
<= 'Z')
2870 modifiers
&= ~CHAR_SHIFT
;
2871 else if (c
>= 'a' && c
<= 'z')
2872 c
-= ('a' - 'A'), modifiers
&= ~CHAR_SHIFT
;
2875 if (modifiers
& CHAR_META
)
2877 /* Move the meta bit to the right place for a
2879 modifiers
&= ~CHAR_META
;
2880 c
= BYTE8_TO_CHAR (c
| 0x80);
2881 force_singlebyte
= 1;
2885 /* Any modifiers remaining are invalid. */
2887 error ("Invalid modifier in string");
2888 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2892 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2893 if (CHAR_BYTE8_P (c
))
2894 force_singlebyte
= 1;
2895 else if (! ASCII_CHAR_P (c
))
2896 force_multibyte
= 1;
2902 end_of_file_error ();
2904 /* If purifying, and string starts with \ newline,
2905 return zero instead. This is for doc strings
2906 that we are really going to find in etc/DOC.nn.nn */
2907 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
2908 return make_number (0);
2910 if (force_multibyte
)
2911 /* READ_BUFFER already contains valid multibyte forms. */
2913 else if (force_singlebyte
)
2915 nchars
= str_as_unibyte ((unsigned char *) read_buffer
,
2917 p
= read_buffer
+ nchars
;
2920 /* Otherwise, READ_BUFFER contains only ASCII. */
2923 /* We want readchar_count to be the number of characters, not
2924 bytes. Hence we adjust for multibyte characters in the
2925 string. ... But it doesn't seem to be necessary, because
2926 READCHAR *does* read multibyte characters from buffers. */
2927 /* readchar_count -= (p - read_buffer) - nchars; */
2929 return make_pure_string (read_buffer
, nchars
, p
- read_buffer
,
2931 || (p
- read_buffer
!= nchars
)));
2932 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
2934 || (p
- read_buffer
!= nchars
)));
2939 int next_char
= READCHAR
;
2942 if (next_char
<= 040
2943 || (next_char
< 0200
2944 && (strchr ("\"';([#?`,", next_char
))))
2950 /* Otherwise, we fall through! Note that the atom-reading loop
2951 below will now loop at least once, assuring that we will not
2952 try to UNREAD two characters in a row. */
2956 if (c
<= 040) goto retry
;
2957 if (c
== 0x8a0) /* NBSP */
2960 char *p
= read_buffer
;
2964 char *end
= read_buffer
+ read_buffer_size
;
2968 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2970 int offset
= p
- read_buffer
;
2971 read_buffer
= (char *) xrealloc (read_buffer
,
2972 read_buffer_size
*= 2);
2973 p
= read_buffer
+ offset
;
2974 end
= read_buffer
+ read_buffer_size
;
2981 end_of_file_error ();
2986 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2991 && c
!= 0x8a0 /* NBSP */
2993 || !(strchr ("\"';()[]#`,", c
))));
2997 int offset
= p
- read_buffer
;
2998 read_buffer
= (char *) xrealloc (read_buffer
,
2999 read_buffer_size
*= 2);
3000 p
= read_buffer
+ offset
;
3001 end
= read_buffer
+ read_buffer_size
;
3008 if (!quoted
&& !uninterned_symbol
)
3012 if (*p1
== '+' || *p1
== '-') p1
++;
3013 /* Is it an integer? */
3016 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
3017 /* Integers can have trailing decimal points. */
3018 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
3020 /* It is an integer. */
3025 /* EMACS_INT n = atol (read_buffer); */
3026 char *endptr
= NULL
;
3027 EMACS_INT n
= (errno
= 0,
3028 strtol (read_buffer
, &endptr
, 10));
3029 if (errno
== ERANGE
&& endptr
)
3032 = Fcons (make_string (read_buffer
,
3033 endptr
- read_buffer
),
3035 xsignal (Qoverflow_error
, args
);
3037 return make_fixnum_or_float (n
);
3041 if (isfloat_string (read_buffer
, 0))
3043 /* Compute NaN and infinities using 0.0 in a variable,
3044 to cope with compilers that think they are smarter
3050 /* Negate the value ourselves. This treats 0, NaNs,
3051 and infinity properly on IEEE floating point hosts,
3052 and works around a common bug where atof ("-0.0")
3054 int negative
= read_buffer
[0] == '-';
3056 /* The only way p[-1] can be 'F' or 'N', after isfloat_string
3057 returns 1, is if the input ends in e+INF or e+NaN. */
3064 value
= zero
/ zero
;
3066 /* If that made a "negative" NaN, negate it. */
3070 union { double d
; char c
[sizeof (double)]; } u_data
, u_minus_zero
;
3073 u_minus_zero
.d
= - 0.0;
3074 for (i
= 0; i
< sizeof (double); i
++)
3075 if (u_data
.c
[i
] & u_minus_zero
.c
[i
])
3081 /* Now VALUE is a positive NaN. */
3084 value
= atof (read_buffer
+ negative
);
3088 return make_float (negative
? - value
: value
);
3092 Lisp_Object name
, result
;
3093 EMACS_INT nbytes
= p
- read_buffer
;
3096 ? multibyte_chars_in_text ((unsigned char *) read_buffer
,
3100 if (uninterned_symbol
&& ! NILP (Vpurify_flag
))
3101 name
= make_pure_string (read_buffer
, nchars
, nbytes
, multibyte
);
3103 name
= make_specified_string (read_buffer
, nchars
, nbytes
,multibyte
);
3104 result
= (uninterned_symbol
? Fmake_symbol (name
)
3105 : Fintern (name
, Qnil
));
3107 if (EQ (Vread_with_symbol_positions
, Qt
)
3108 || EQ (Vread_with_symbol_positions
, readcharfun
))
3109 Vread_symbol_positions_list
=
3110 /* Kind of a hack; this will probably fail if characters
3111 in the symbol name were escaped. Not really a big
3113 Fcons (Fcons (result
,
3114 make_number (readchar_count
3115 - XFASTINT (Flength (Fsymbol_name (result
))))),
3116 Vread_symbol_positions_list
);
3124 /* List of nodes we've seen during substitute_object_in_subtree. */
3125 static Lisp_Object seen_list
;
3128 substitute_object_in_subtree (Lisp_Object object
, Lisp_Object placeholder
)
3130 Lisp_Object check_object
;
3132 /* We haven't seen any objects when we start. */
3135 /* Make all the substitutions. */
3137 = substitute_object_recurse (object
, placeholder
, object
);
3139 /* Clear seen_list because we're done with it. */
3142 /* The returned object here is expected to always eq the
3144 if (!EQ (check_object
, object
))
3145 error ("Unexpected mutation error in reader");
3148 /* Feval doesn't get called from here, so no gc protection is needed. */
3149 #define SUBSTITUTE(get_val, set_val) \
3151 Lisp_Object old_value = get_val; \
3152 Lisp_Object true_value \
3153 = substitute_object_recurse (object, placeholder, \
3156 if (!EQ (old_value, true_value)) \
3163 substitute_object_recurse (Lisp_Object object
, Lisp_Object placeholder
, Lisp_Object subtree
)
3165 /* If we find the placeholder, return the target object. */
3166 if (EQ (placeholder
, subtree
))
3169 /* If we've been to this node before, don't explore it again. */
3170 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
3173 /* If this node can be the entry point to a cycle, remember that
3174 we've seen it. It can only be such an entry point if it was made
3175 by #n=, which means that we can find it as a value in
3177 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
3178 seen_list
= Fcons (subtree
, seen_list
);
3180 /* Recurse according to subtree's type.
3181 Every branch must return a Lisp_Object. */
3182 switch (XTYPE (subtree
))
3184 case Lisp_Vectorlike
:
3187 if (BOOL_VECTOR_P (subtree
))
3188 return subtree
; /* No sub-objects anyway. */
3189 else if (CHAR_TABLE_P (subtree
) || SUB_CHAR_TABLE_P (subtree
)
3190 || COMPILEDP (subtree
))
3191 length
= ASIZE (subtree
) & PSEUDOVECTOR_SIZE_MASK
;
3192 else if (VECTORP (subtree
))
3193 length
= ASIZE (subtree
);
3195 /* An unknown pseudovector may contain non-Lisp fields, so we
3196 can't just blindly traverse all its fields. We used to call
3197 `Flength' which signaled `sequencep', so I just preserved this
3199 wrong_type_argument (Qsequencep
, subtree
);
3201 for (i
= 0; i
< length
; i
++)
3202 SUBSTITUTE (AREF (subtree
, i
),
3203 ASET (subtree
, i
, true_value
));
3209 SUBSTITUTE (XCAR (subtree
),
3210 XSETCAR (subtree
, true_value
));
3211 SUBSTITUTE (XCDR (subtree
),
3212 XSETCDR (subtree
, true_value
));
3218 /* Check for text properties in each interval.
3219 substitute_in_interval contains part of the logic. */
3221 INTERVAL root_interval
= STRING_INTERVALS (subtree
);
3222 Lisp_Object arg
= Fcons (object
, placeholder
);
3224 traverse_intervals_noorder (root_interval
,
3225 &substitute_in_interval
, arg
);
3230 /* Other types don't recurse any further. */
3236 /* Helper function for substitute_object_recurse. */
3238 substitute_in_interval (INTERVAL interval
, Lisp_Object arg
)
3240 Lisp_Object object
= Fcar (arg
);
3241 Lisp_Object placeholder
= Fcdr (arg
);
3243 SUBSTITUTE (interval
->plist
, interval
->plist
= true_value
);
3254 isfloat_string (const char *cp
, int ignore_trailing
)
3257 const char *start
= cp
;
3260 if (*cp
== '+' || *cp
== '-')
3263 if (*cp
>= '0' && *cp
<= '9')
3266 while (*cp
>= '0' && *cp
<= '9')
3274 if (*cp
>= '0' && *cp
<= '9')
3277 while (*cp
>= '0' && *cp
<= '9')
3280 if (*cp
== 'e' || *cp
== 'E')
3284 if (*cp
== '+' || *cp
== '-')
3288 if (*cp
>= '0' && *cp
<= '9')
3291 while (*cp
>= '0' && *cp
<= '9')
3294 else if (cp
== start
)
3296 else if (cp
[-1] == '+' && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
3301 else if (cp
[-1] == '+' && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
3307 return ((ignore_trailing
3308 || *cp
== 0 || *cp
== ' ' || *cp
== '\t' || *cp
== '\n'
3309 || *cp
== '\r' || *cp
== '\f')
3310 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
3311 || state
== (DOT_CHAR
|TRAIL_INT
)
3312 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
3313 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
3314 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
3319 read_vector (Lisp_Object readcharfun
, int bytecodeflag
)
3323 register Lisp_Object
*ptr
;
3324 register Lisp_Object tem
, item
, vector
;
3325 register struct Lisp_Cons
*otem
;
3328 tem
= read_list (1, readcharfun
);
3329 len
= Flength (tem
);
3330 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
3332 size
= XVECTOR (vector
)->size
;
3333 ptr
= XVECTOR (vector
)->contents
;
3334 for (i
= 0; i
< size
; i
++)
3338 /* If `load-force-doc-strings' is t when reading a lazily-loaded
3339 bytecode object, the docstring containing the bytecode and
3340 constants values must be treated as unibyte and passed to
3341 Fread, to get the actual bytecode string and constants vector. */
3342 if (bytecodeflag
&& load_force_doc_strings
)
3344 if (i
== COMPILED_BYTECODE
)
3346 if (!STRINGP (item
))
3347 error ("Invalid byte code");
3349 /* Delay handling the bytecode slot until we know whether
3350 it is lazily-loaded (we can tell by whether the
3351 constants slot is nil). */
3352 ptr
[COMPILED_CONSTANTS
] = item
;
3355 else if (i
== COMPILED_CONSTANTS
)
3357 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
3361 /* Coerce string to unibyte (like string-as-unibyte,
3362 but without generating extra garbage and
3363 guaranteeing no change in the contents). */
3364 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
3365 STRING_SET_UNIBYTE (bytestr
);
3367 item
= Fread (Fcons (bytestr
, readcharfun
));
3369 error ("Invalid byte code");
3371 otem
= XCONS (item
);
3372 bytestr
= XCAR (item
);
3377 /* Now handle the bytecode slot. */
3378 ptr
[COMPILED_BYTECODE
] = read_pure
? Fpurecopy (bytestr
) : bytestr
;
3380 else if (i
== COMPILED_DOC_STRING
3382 && ! STRING_MULTIBYTE (item
))
3384 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
3385 item
= Fdecode_coding_string (item
, Qemacs_mule
, Qnil
, Qnil
);
3387 item
= Fstring_as_multibyte (item
);
3390 ptr
[i
] = read_pure
? Fpurecopy (item
) : item
;
3399 /* FLAG = 1 means check for ] to terminate rather than ) and .
3400 FLAG = -1 means check for starting with defun
3401 and make structure pure. */
3404 read_list (int flag
, register Lisp_Object readcharfun
)
3406 /* -1 means check next element for defun,
3407 0 means don't check,
3408 1 means already checked and found defun. */
3409 int defunflag
= flag
< 0 ? -1 : 0;
3410 Lisp_Object val
, tail
;
3411 register Lisp_Object elt
, tem
;
3412 struct gcpro gcpro1
, gcpro2
;
3413 /* 0 is the normal case.
3414 1 means this list is a doc reference; replace it with the number 0.
3415 2 means this list is a doc reference; replace it with the doc string. */
3416 int doc_reference
= 0;
3418 /* Initialize this to 1 if we are reading a list. */
3419 int first_in_list
= flag
<= 0;
3428 elt
= read1 (readcharfun
, &ch
, first_in_list
);
3433 /* While building, if the list starts with #$, treat it specially. */
3434 if (EQ (elt
, Vload_file_name
)
3436 && !NILP (Vpurify_flag
))
3438 if (NILP (Vdoc_file_name
))
3439 /* We have not yet called Snarf-documentation, so assume
3440 this file is described in the DOC-MM.NN file
3441 and Snarf-documentation will fill in the right value later.
3442 For now, replace the whole list with 0. */
3445 /* We have already called Snarf-documentation, so make a relative
3446 file name for this file, so it can be found properly
3447 in the installed Lisp directory.
3448 We don't use Fexpand_file_name because that would make
3449 the directory absolute now. */
3450 elt
= concat2 (build_string ("../lisp/"),
3451 Ffile_name_nondirectory (elt
));
3453 else if (EQ (elt
, Vload_file_name
)
3455 && load_force_doc_strings
)
3464 invalid_syntax (") or . in a vector", 18);
3472 XSETCDR (tail
, read0 (readcharfun
));
3474 val
= read0 (readcharfun
);
3475 read1 (readcharfun
, &ch
, 0);
3479 if (doc_reference
== 1)
3480 return make_number (0);
3481 if (doc_reference
== 2)
3483 /* Get a doc string from the file we are loading.
3484 If it's in saved_doc_string, get it from there.
3486 Here, we don't know if the string is a
3487 bytecode string or a doc string. As a
3488 bytecode string must be unibyte, we always
3489 return a unibyte string. If it is actually a
3490 doc string, caller must make it
3493 int pos
= XINT (XCDR (val
));
3494 /* Position is negative for user variables. */
3495 if (pos
< 0) pos
= -pos
;
3496 if (pos
>= saved_doc_string_position
3497 && pos
< (saved_doc_string_position
3498 + saved_doc_string_length
))
3500 int start
= pos
- saved_doc_string_position
;
3503 /* Process quoting with ^A,
3504 and find the end of the string,
3505 which is marked with ^_ (037). */
3506 for (from
= start
, to
= start
;
3507 saved_doc_string
[from
] != 037;)
3509 int c
= saved_doc_string
[from
++];
3512 c
= saved_doc_string
[from
++];
3514 saved_doc_string
[to
++] = c
;
3516 saved_doc_string
[to
++] = 0;
3518 saved_doc_string
[to
++] = 037;
3521 saved_doc_string
[to
++] = c
;
3524 return make_unibyte_string (saved_doc_string
+ start
,
3527 /* Look in prev_saved_doc_string the same way. */
3528 else if (pos
>= prev_saved_doc_string_position
3529 && pos
< (prev_saved_doc_string_position
3530 + prev_saved_doc_string_length
))
3532 int start
= pos
- prev_saved_doc_string_position
;
3535 /* Process quoting with ^A,
3536 and find the end of the string,
3537 which is marked with ^_ (037). */
3538 for (from
= start
, to
= start
;
3539 prev_saved_doc_string
[from
] != 037;)
3541 int c
= prev_saved_doc_string
[from
++];
3544 c
= prev_saved_doc_string
[from
++];
3546 prev_saved_doc_string
[to
++] = c
;
3548 prev_saved_doc_string
[to
++] = 0;
3550 prev_saved_doc_string
[to
++] = 037;
3553 prev_saved_doc_string
[to
++] = c
;
3556 return make_unibyte_string (prev_saved_doc_string
3561 return get_doc_string (val
, 1, 0);
3566 invalid_syntax (". in wrong context", 18);
3568 invalid_syntax ("] in a list", 11);
3570 tem
= (read_pure
&& flag
<= 0
3571 ? pure_cons (elt
, Qnil
)
3572 : Fcons (elt
, Qnil
));
3574 XSETCDR (tail
, tem
);
3579 defunflag
= EQ (elt
, Qdefun
);
3580 else if (defunflag
> 0)
3585 Lisp_Object initial_obarray
;
3587 /* oblookup stores the bucket number here, for the sake of Funintern. */
3589 int oblookup_last_bucket_number
;
3591 static int hash_string (const char *ptr
, int len
);
3593 /* Get an error if OBARRAY is not an obarray.
3594 If it is one, return it. */
3597 check_obarray (Lisp_Object obarray
)
3599 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3601 /* If Vobarray is now invalid, force it to be valid. */
3602 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3603 wrong_type_argument (Qvectorp
, obarray
);
3608 /* Intern the C string STR: return a symbol with that name,
3609 interned in the current obarray. */
3612 intern (const char *str
)
3615 int len
= strlen (str
);
3616 Lisp_Object obarray
;
3619 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3620 obarray
= check_obarray (obarray
);
3621 tem
= oblookup (obarray
, str
, len
, len
);
3624 return Fintern (make_string (str
, len
), obarray
);
3628 intern_c_string (const char *str
)
3631 int len
= strlen (str
);
3632 Lisp_Object obarray
;
3635 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3636 obarray
= check_obarray (obarray
);
3637 tem
= oblookup (obarray
, str
, len
, len
);
3641 if (NILP (Vpurify_flag
))
3642 /* Creating a non-pure string from a string literal not
3643 implemented yet. We could just use make_string here and live
3644 with the extra copy. */
3647 return Fintern (make_pure_c_string (str
), obarray
);
3650 /* Create an uninterned symbol with name STR. */
3653 make_symbol (const char *str
)
3655 int len
= strlen (str
);
3657 return Fmake_symbol (!NILP (Vpurify_flag
)
3658 ? make_pure_string (str
, len
, len
, 0)
3659 : make_string (str
, len
));
3662 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3663 doc
: /* Return the canonical symbol whose name is STRING.
3664 If there is none, one is created by this function and returned.
3665 A second optional argument specifies the obarray to use;
3666 it defaults to the value of `obarray'. */)
3667 (Lisp_Object string
, Lisp_Object obarray
)
3669 register Lisp_Object tem
, sym
, *ptr
;
3671 if (NILP (obarray
)) obarray
= Vobarray
;
3672 obarray
= check_obarray (obarray
);
3674 CHECK_STRING (string
);
3676 tem
= oblookup (obarray
, SSDATA (string
),
3679 if (!INTEGERP (tem
))
3682 if (!NILP (Vpurify_flag
))
3683 string
= Fpurecopy (string
);
3684 sym
= Fmake_symbol (string
);
3686 if (EQ (obarray
, initial_obarray
))
3687 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3689 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED
;
3691 if ((SREF (string
, 0) == ':')
3692 && EQ (obarray
, initial_obarray
))
3694 XSYMBOL (sym
)->constant
= 1;
3695 XSYMBOL (sym
)->redirect
= SYMBOL_PLAINVAL
;
3696 SET_SYMBOL_VAL (XSYMBOL (sym
), sym
);
3699 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
3701 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
3703 XSYMBOL (sym
)->next
= 0;
3708 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3709 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3710 NAME may be a string or a symbol. If it is a symbol, that exact
3711 symbol is searched for.
3712 A second optional argument specifies the obarray to use;
3713 it defaults to the value of `obarray'. */)
3714 (Lisp_Object name
, Lisp_Object obarray
)
3716 register Lisp_Object tem
, string
;
3718 if (NILP (obarray
)) obarray
= Vobarray
;
3719 obarray
= check_obarray (obarray
);
3721 if (!SYMBOLP (name
))
3723 CHECK_STRING (name
);
3727 string
= SYMBOL_NAME (name
);
3729 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3730 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3736 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3737 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3738 The value is t if a symbol was found and deleted, nil otherwise.
3739 NAME may be a string or a symbol. If it is a symbol, that symbol
3740 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3741 OBARRAY defaults to the value of the variable `obarray'. */)
3742 (Lisp_Object name
, Lisp_Object obarray
)
3744 register Lisp_Object string
, tem
;
3747 if (NILP (obarray
)) obarray
= Vobarray
;
3748 obarray
= check_obarray (obarray
);
3751 string
= SYMBOL_NAME (name
);
3754 CHECK_STRING (name
);
3758 tem
= oblookup (obarray
, SSDATA (string
),
3763 /* If arg was a symbol, don't delete anything but that symbol itself. */
3764 if (SYMBOLP (name
) && !EQ (name
, tem
))
3767 /* There are plenty of other symbols which will screw up the Emacs
3768 session if we unintern them, as well as even more ways to use
3769 `setq' or `fset' or whatnot to make the Emacs session
3770 unusable. Let's not go down this silly road. --Stef */
3771 /* if (EQ (tem, Qnil) || EQ (tem, Qt))
3772 error ("Attempt to unintern t or nil"); */
3774 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3776 hash
= oblookup_last_bucket_number
;
3778 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
3780 if (XSYMBOL (tem
)->next
)
3781 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
3783 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
3787 Lisp_Object tail
, following
;
3789 for (tail
= XVECTOR (obarray
)->contents
[hash
];
3790 XSYMBOL (tail
)->next
;
3793 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
3794 if (EQ (following
, tem
))
3796 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
3805 /* Return the symbol in OBARRAY whose names matches the string
3806 of SIZE characters (SIZE_BYTE bytes) at PTR.
3807 If there is no such symbol in OBARRAY, return nil.
3809 Also store the bucket number in oblookup_last_bucket_number. */
3812 oblookup (Lisp_Object obarray
, register const char *ptr
, EMACS_INT size
, EMACS_INT size_byte
)
3816 register Lisp_Object tail
;
3817 Lisp_Object bucket
, tem
;
3819 if (!VECTORP (obarray
)
3820 || (obsize
= XVECTOR (obarray
)->size
) == 0)
3822 obarray
= check_obarray (obarray
);
3823 obsize
= XVECTOR (obarray
)->size
;
3825 /* This is sometimes needed in the middle of GC. */
3826 obsize
&= ~ARRAY_MARK_FLAG
;
3827 hash
= hash_string (ptr
, size_byte
) % obsize
;
3828 bucket
= XVECTOR (obarray
)->contents
[hash
];
3829 oblookup_last_bucket_number
= hash
;
3830 if (EQ (bucket
, make_number (0)))
3832 else if (!SYMBOLP (bucket
))
3833 error ("Bad data in guts of obarray"); /* Like CADR error message */
3835 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
3837 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
3838 && SCHARS (SYMBOL_NAME (tail
)) == size
3839 && !memcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
3841 else if (XSYMBOL (tail
)->next
== 0)
3844 XSETINT (tem
, hash
);
3849 hash_string (const char *ptr
, int len
)
3851 register const char *p
= ptr
;
3852 register const char *end
= p
+ len
;
3853 register unsigned char c
;
3854 register int hash
= 0;
3859 if (c
>= 0140) c
-= 40;
3860 hash
= ((hash
<<3) + (hash
>>28) + c
);
3862 return hash
& 07777777777;
3866 map_obarray (Lisp_Object obarray
, void (*fn
) (Lisp_Object
, Lisp_Object
), Lisp_Object arg
)
3869 register Lisp_Object tail
;
3870 CHECK_VECTOR (obarray
);
3871 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
3873 tail
= XVECTOR (obarray
)->contents
[i
];
3878 if (XSYMBOL (tail
)->next
== 0)
3880 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
3886 mapatoms_1 (Lisp_Object sym
, Lisp_Object function
)
3888 call1 (function
, sym
);
3891 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
3892 doc
: /* Call FUNCTION on every symbol in OBARRAY.
3893 OBARRAY defaults to the value of `obarray'. */)
3894 (Lisp_Object function
, Lisp_Object obarray
)
3896 if (NILP (obarray
)) obarray
= Vobarray
;
3897 obarray
= check_obarray (obarray
);
3899 map_obarray (obarray
, mapatoms_1
, function
);
3903 #define OBARRAY_SIZE 1511
3908 Lisp_Object oblength
;
3910 XSETFASTINT (oblength
, OBARRAY_SIZE
);
3912 Vobarray
= Fmake_vector (oblength
, make_number (0));
3913 initial_obarray
= Vobarray
;
3914 staticpro (&initial_obarray
);
3916 Qunbound
= Fmake_symbol (make_pure_c_string ("unbound"));
3917 /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the
3918 NILP (Vpurify_flag) check in intern_c_string. */
3919 Qnil
= make_number (-1); Vpurify_flag
= make_number (1);
3920 Qnil
= intern_c_string ("nil");
3922 /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil,
3923 so those two need to be fixed manally. */
3924 SET_SYMBOL_VAL (XSYMBOL (Qunbound
), Qunbound
);
3925 XSYMBOL (Qunbound
)->function
= Qunbound
;
3926 XSYMBOL (Qunbound
)->plist
= Qnil
;
3927 /* XSYMBOL (Qnil)->function = Qunbound; */
3928 SET_SYMBOL_VAL (XSYMBOL (Qnil
), Qnil
);
3929 XSYMBOL (Qnil
)->constant
= 1;
3930 XSYMBOL (Qnil
)->plist
= Qnil
;
3932 Qt
= intern_c_string ("t");
3933 SET_SYMBOL_VAL (XSYMBOL (Qt
), Qt
);
3934 XSYMBOL (Qt
)->constant
= 1;
3936 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
3939 Qvariable_documentation
= intern_c_string ("variable-documentation");
3940 staticpro (&Qvariable_documentation
);
3942 read_buffer_size
= 100 + MAX_MULTIBYTE_LENGTH
;
3943 read_buffer
= (char *) xmalloc (read_buffer_size
);
3947 defsubr (struct Lisp_Subr
*sname
)
3950 sym
= intern_c_string (sname
->symbol_name
);
3951 XSETPVECTYPE (sname
, PVEC_SUBR
);
3952 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3955 #ifdef NOTDEF /* use fset in subr.el now */
3957 defalias (sname
, string
)
3958 struct Lisp_Subr
*sname
;
3962 sym
= intern (string
);
3963 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3967 /* Define an "integer variable"; a symbol whose value is forwarded to a
3968 C variable of type int. Sample call (munged w "xx" to fool make-docfile):
3969 DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */
3971 defvar_int (struct Lisp_Intfwd
*i_fwd
,
3972 const char *namestring
, EMACS_INT
*address
)
3975 sym
= intern_c_string (namestring
);
3976 i_fwd
->type
= Lisp_Fwd_Int
;
3977 i_fwd
->intvar
= address
;
3978 XSYMBOL (sym
)->declared_special
= 1;
3979 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
3980 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)i_fwd
);
3983 /* Similar but define a variable whose value is t if address contains 1,
3984 nil if address contains 0. */
3986 defvar_bool (struct Lisp_Boolfwd
*b_fwd
,
3987 const char *namestring
, int *address
)
3990 sym
= intern_c_string (namestring
);
3991 b_fwd
->type
= Lisp_Fwd_Bool
;
3992 b_fwd
->boolvar
= address
;
3993 XSYMBOL (sym
)->declared_special
= 1;
3994 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
3995 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)b_fwd
);
3996 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
3999 /* Similar but define a variable whose value is the Lisp Object stored
4000 at address. Two versions: with and without gc-marking of the C
4001 variable. The nopro version is used when that variable will be
4002 gc-marked for some other reason, since marking the same slot twice
4003 can cause trouble with strings. */
4005 defvar_lisp_nopro (struct Lisp_Objfwd
*o_fwd
,
4006 const char *namestring
, Lisp_Object
*address
)
4009 sym
= intern_c_string (namestring
);
4010 o_fwd
->type
= Lisp_Fwd_Obj
;
4011 o_fwd
->objvar
= address
;
4012 XSYMBOL (sym
)->declared_special
= 1;
4013 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4014 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)o_fwd
);
4018 defvar_lisp (struct Lisp_Objfwd
*o_fwd
,
4019 const char *namestring
, Lisp_Object
*address
)
4021 defvar_lisp_nopro (o_fwd
, namestring
, address
);
4022 staticpro (address
);
4026 /* Similar but define a variable whose value is the Lisp Object stored
4027 at a particular offset in the current kboard object. */
4030 defvar_kboard (struct Lisp_Kboard_Objfwd
*ko_fwd
,
4031 const char *namestring
, int offset
)
4034 sym
= intern_c_string (namestring
);
4035 ko_fwd
->type
= Lisp_Fwd_Kboard_Obj
;
4036 ko_fwd
->offset
= offset
;
4037 XSYMBOL (sym
)->declared_special
= 1;
4038 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4039 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)ko_fwd
);
4042 /* Record the value of load-path used at the start of dumping
4043 so we can see if the site changed it later during dumping. */
4044 static Lisp_Object dump_path
;
4050 int turn_off_warning
= 0;
4052 /* Compute the default load-path. */
4054 normal
= PATH_LOADSEARCH
;
4055 Vload_path
= decode_env_path (0, normal
);
4057 if (NILP (Vpurify_flag
))
4058 normal
= PATH_LOADSEARCH
;
4060 normal
= PATH_DUMPLOADSEARCH
;
4062 /* In a dumped Emacs, we normally have to reset the value of
4063 Vload_path from PATH_LOADSEARCH, since the value that was dumped
4064 uses ../lisp, instead of the path of the installed elisp
4065 libraries. However, if it appears that Vload_path was changed
4066 from the default before dumping, don't override that value. */
4069 if (! NILP (Fequal (dump_path
, Vload_path
)))
4071 Vload_path
= decode_env_path (0, normal
);
4072 if (!NILP (Vinstallation_directory
))
4074 Lisp_Object tem
, tem1
, sitelisp
;
4076 /* Remove site-lisp dirs from path temporarily and store
4077 them in sitelisp, then conc them on at the end so
4078 they're always first in path. */
4082 tem
= Fcar (Vload_path
);
4083 tem1
= Fstring_match (build_string ("site-lisp"),
4087 Vload_path
= Fcdr (Vload_path
);
4088 sitelisp
= Fcons (tem
, sitelisp
);
4094 /* Add to the path the lisp subdir of the
4095 installation dir, if it exists. */
4096 tem
= Fexpand_file_name (build_string ("lisp"),
4097 Vinstallation_directory
);
4098 tem1
= Ffile_exists_p (tem
);
4101 if (NILP (Fmember (tem
, Vload_path
)))
4103 turn_off_warning
= 1;
4104 Vload_path
= Fcons (tem
, Vload_path
);
4108 /* That dir doesn't exist, so add the build-time
4109 Lisp dirs instead. */
4110 Vload_path
= nconc2 (Vload_path
, dump_path
);
4112 /* Add leim under the installation dir, if it exists. */
4113 tem
= Fexpand_file_name (build_string ("leim"),
4114 Vinstallation_directory
);
4115 tem1
= Ffile_exists_p (tem
);
4118 if (NILP (Fmember (tem
, Vload_path
)))
4119 Vload_path
= Fcons (tem
, Vload_path
);
4122 /* Add site-lisp under the installation dir, if it exists. */
4123 tem
= Fexpand_file_name (build_string ("site-lisp"),
4124 Vinstallation_directory
);
4125 tem1
= Ffile_exists_p (tem
);
4128 if (NILP (Fmember (tem
, Vload_path
)))
4129 Vload_path
= Fcons (tem
, Vload_path
);
4132 /* If Emacs was not built in the source directory,
4133 and it is run from where it was built, add to load-path
4134 the lisp, leim and site-lisp dirs under that directory. */
4136 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
4140 tem
= Fexpand_file_name (build_string ("src/Makefile"),
4141 Vinstallation_directory
);
4142 tem1
= Ffile_exists_p (tem
);
4144 /* Don't be fooled if they moved the entire source tree
4145 AFTER dumping Emacs. If the build directory is indeed
4146 different from the source dir, src/Makefile.in and
4147 src/Makefile will not be found together. */
4148 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
4149 Vinstallation_directory
);
4150 tem2
= Ffile_exists_p (tem
);
4151 if (!NILP (tem1
) && NILP (tem2
))
4153 tem
= Fexpand_file_name (build_string ("lisp"),
4156 if (NILP (Fmember (tem
, Vload_path
)))
4157 Vload_path
= Fcons (tem
, Vload_path
);
4159 tem
= Fexpand_file_name (build_string ("leim"),
4162 if (NILP (Fmember (tem
, Vload_path
)))
4163 Vload_path
= Fcons (tem
, Vload_path
);
4165 tem
= Fexpand_file_name (build_string ("site-lisp"),
4168 if (NILP (Fmember (tem
, Vload_path
)))
4169 Vload_path
= Fcons (tem
, Vload_path
);
4172 if (!NILP (sitelisp
) && !no_site_lisp
)
4173 Vload_path
= nconc2 (Fnreverse (sitelisp
), Vload_path
);
4179 /* NORMAL refers to the lisp dir in the source directory. */
4180 /* We used to add ../lisp at the front here, but
4181 that caused trouble because it was copied from dump_path
4182 into Vload_path, above, when Vinstallation_directory was non-nil.
4183 It should be unnecessary. */
4184 Vload_path
= decode_env_path (0, normal
);
4185 dump_path
= Vload_path
;
4189 #if (!(defined (WINDOWSNT) || (defined (HAVE_NS))))
4190 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
4191 almost never correct, thereby causing a warning to be printed out that
4192 confuses users. Since PATH_LOADSEARCH is always overridden by the
4193 EMACSLOADPATH environment variable below, disable the warning on NT. */
4195 /* Warn if dirs in the *standard* path don't exist. */
4196 if (!turn_off_warning
)
4198 Lisp_Object path_tail
;
4200 for (path_tail
= Vload_path
;
4202 path_tail
= XCDR (path_tail
))
4204 Lisp_Object dirfile
;
4205 dirfile
= Fcar (path_tail
);
4206 if (STRINGP (dirfile
))
4208 dirfile
= Fdirectory_file_name (dirfile
);
4209 if (access (SSDATA (dirfile
), 0) < 0)
4210 dir_warning ("Warning: Lisp directory `%s' does not exist.\n",
4215 #endif /* !(WINDOWSNT || HAVE_NS) */
4217 /* If the EMACSLOADPATH environment variable is set, use its value.
4218 This doesn't apply if we're dumping. */
4220 if (NILP (Vpurify_flag
)
4221 && egetenv ("EMACSLOADPATH"))
4223 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
4227 load_in_progress
= 0;
4228 Vload_file_name
= Qnil
;
4230 load_descriptor_list
= Qnil
;
4232 Vstandard_input
= Qt
;
4233 Vloads_in_progress
= Qnil
;
4236 /* Print a warning, using format string FORMAT, that directory DIRNAME
4237 does not exist. Print it on stderr and put it in *Messages*. */
4240 dir_warning (const char *format
, Lisp_Object dirname
)
4243 = (char *) alloca (SCHARS (dirname
) + strlen (format
) + 5);
4245 fprintf (stderr
, format
, SDATA (dirname
));
4246 sprintf (buffer
, format
, SDATA (dirname
));
4247 /* Don't log the warning before we've initialized!! */
4249 message_dolog (buffer
, strlen (buffer
), 0, STRING_MULTIBYTE (dirname
));
4253 syms_of_lread (void)
4256 defsubr (&Sread_from_string
);
4258 defsubr (&Sintern_soft
);
4259 defsubr (&Sunintern
);
4260 defsubr (&Sget_load_suffixes
);
4262 defsubr (&Seval_buffer
);
4263 defsubr (&Seval_region
);
4264 defsubr (&Sread_char
);
4265 defsubr (&Sread_char_exclusive
);
4266 defsubr (&Sread_event
);
4267 defsubr (&Sget_file_char
);
4268 defsubr (&Smapatoms
);
4269 defsubr (&Slocate_file_internal
);
4271 DEFVAR_LISP ("obarray", Vobarray
,
4272 doc
: /* Symbol table for use by `intern' and `read'.
4273 It is a vector whose length ought to be prime for best results.
4274 The vector's contents don't make sense if examined from Lisp programs;
4275 to find all the symbols in an obarray, use `mapatoms'. */);
4277 DEFVAR_LISP ("values", Vvalues
,
4278 doc
: /* List of values of all expressions which were read, evaluated and printed.
4279 Order is reverse chronological. */);
4281 DEFVAR_LISP ("standard-input", Vstandard_input
,
4282 doc
: /* Stream for read to get input from.
4283 See documentation of `read' for possible values. */);
4284 Vstandard_input
= Qt
;
4286 DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions
,
4287 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
4289 If this variable is a buffer, then only forms read from that buffer
4290 will be added to `read-symbol-positions-list'.
4291 If this variable is t, then all read forms will be added.
4292 The effect of all other values other than nil are not currently
4293 defined, although they may be in the future.
4295 The positions are relative to the last call to `read' or
4296 `read-from-string'. It is probably a bad idea to set this variable at
4297 the toplevel; bind it instead. */);
4298 Vread_with_symbol_positions
= Qnil
;
4300 DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list
,
4301 doc
: /* A list mapping read symbols to their positions.
4302 This variable is modified during calls to `read' or
4303 `read-from-string', but only when `read-with-symbol-positions' is
4306 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
4307 CHAR-POSITION is an integer giving the offset of that occurrence of the
4308 symbol from the position where `read' or `read-from-string' started.
4310 Note that a symbol will appear multiple times in this list, if it was
4311 read multiple times. The list is in the same order as the symbols
4313 Vread_symbol_positions_list
= Qnil
;
4315 DEFVAR_LISP ("read-circle", Vread_circle
,
4316 doc
: /* Non-nil means read recursive structures using #N= and #N# syntax. */);
4319 DEFVAR_LISP ("load-path", Vload_path
,
4320 doc
: /* *List of directories to search for files to load.
4321 Each element is a string (directory name) or nil (try default directory).
4322 Initialized based on EMACSLOADPATH environment variable, if any,
4323 otherwise to default specified by file `epaths.h' when Emacs was built. */);
4325 DEFVAR_LISP ("load-suffixes", Vload_suffixes
,
4326 doc
: /* List of suffixes for (compiled or source) Emacs Lisp files.
4327 This list should not include the empty string.
4328 `load' and related functions try to append these suffixes, in order,
4329 to the specified file name if a Lisp suffix is allowed or required. */);
4330 Vload_suffixes
= Fcons (make_pure_c_string (".elc"),
4331 Fcons (make_pure_c_string (".el"), Qnil
));
4332 DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes
,
4333 doc
: /* List of suffixes that indicate representations of \
4335 This list should normally start with the empty string.
4337 Enabling Auto Compression mode appends the suffixes in
4338 `jka-compr-load-suffixes' to this list and disabling Auto Compression
4339 mode removes them again. `load' and related functions use this list to
4340 determine whether they should look for compressed versions of a file
4341 and, if so, which suffixes they should try to append to the file name
4342 in order to do so. However, if you want to customize which suffixes
4343 the loading functions recognize as compression suffixes, you should
4344 customize `jka-compr-load-suffixes' rather than the present variable. */);
4345 Vload_file_rep_suffixes
= Fcons (empty_unibyte_string
, Qnil
);
4347 DEFVAR_BOOL ("load-in-progress", load_in_progress
,
4348 doc
: /* Non-nil if inside of `load'. */);
4349 Qload_in_progress
= intern_c_string ("load-in-progress");
4350 staticpro (&Qload_in_progress
);
4352 DEFVAR_LISP ("after-load-alist", Vafter_load_alist
,
4353 doc
: /* An alist of expressions to be evalled when particular files are loaded.
4354 Each element looks like (REGEXP-OR-FEATURE FORMS...).
4356 REGEXP-OR-FEATURE is either a regular expression to match file names, or
4357 a symbol \(a feature name).
4359 When `load' is run and the file-name argument matches an element's
4360 REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol
4361 REGEXP-OR-FEATURE, the FORMS in the element are executed.
4363 An error in FORMS does not undo the load, but does prevent execution of
4364 the rest of the FORMS. */);
4365 Vafter_load_alist
= Qnil
;
4367 DEFVAR_LISP ("load-history", Vload_history
,
4368 doc
: /* Alist mapping loaded file names to symbols and features.
4369 Each alist element should be a list (FILE-NAME ENTRIES...), where
4370 FILE-NAME is the name of a file that has been loaded into Emacs.
4371 The file name is absolute and true (i.e. it doesn't contain symlinks).
4372 As an exception, one of the alist elements may have FILE-NAME nil,
4373 for symbols and features not associated with any file.
4375 The remaining ENTRIES in the alist element describe the functions and
4376 variables defined in that file, the features provided, and the
4377 features required. Each entry has the form `(provide . FEATURE)',
4378 `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)',
4379 `(defface . SYMBOL)', or `(t . SYMBOL)'. In addition, an entry `(t
4380 . SYMBOL)' may precede an entry `(defun . FUNCTION)', and means that
4381 SYMBOL was an autoload before this file redefined it as a function.
4383 During preloading, the file name recorded is relative to the main Lisp
4384 directory. These file names are converted to absolute at startup. */);
4385 Vload_history
= Qnil
;
4387 DEFVAR_LISP ("load-file-name", Vload_file_name
,
4388 doc
: /* Full name of file being loaded by `load'. */);
4389 Vload_file_name
= Qnil
;
4391 DEFVAR_LISP ("user-init-file", Vuser_init_file
,
4392 doc
: /* File name, including directory, of user's initialization file.
4393 If the file loaded had extension `.elc', and the corresponding source file
4394 exists, this variable contains the name of source file, suitable for use
4395 by functions like `custom-save-all' which edit the init file.
4396 While Emacs loads and evaluates the init file, value is the real name
4397 of the file, regardless of whether or not it has the `.elc' extension. */);
4398 Vuser_init_file
= Qnil
;
4400 DEFVAR_LISP ("current-load-list", Vcurrent_load_list
,
4401 doc
: /* Used for internal purposes by `load'. */);
4402 Vcurrent_load_list
= Qnil
;
4404 DEFVAR_LISP ("load-read-function", Vload_read_function
,
4405 doc
: /* Function used by `load' and `eval-region' for reading expressions.
4406 The default is nil, which means use the function `read'. */);
4407 Vload_read_function
= Qnil
;
4409 DEFVAR_LISP ("load-source-file-function", Vload_source_file_function
,
4410 doc
: /* Function called in `load' for loading an Emacs Lisp source file.
4411 This function is for doing code conversion before reading the source file.
4412 If nil, loading is done without any code conversion.
4413 Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where
4414 FULLNAME is the full name of FILE.
4415 See `load' for the meaning of the remaining arguments. */);
4416 Vload_source_file_function
= Qnil
;
4418 DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings
,
4419 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
4420 This is useful when the file being loaded is a temporary copy. */);
4421 load_force_doc_strings
= 0;
4423 DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte
,
4424 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
4425 This is normally bound by `load' and `eval-buffer' to control `read',
4426 and is not meant for users to change. */);
4427 load_convert_to_unibyte
= 0;
4429 DEFVAR_LISP ("source-directory", Vsource_directory
,
4430 doc
: /* Directory in which Emacs sources were found when Emacs was built.
4431 You cannot count on them to still be there! */);
4433 = Fexpand_file_name (build_string ("../"),
4434 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
4436 DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list
,
4437 doc
: /* List of files that were preloaded (when dumping Emacs). */);
4438 Vpreloaded_file_list
= Qnil
;
4440 DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars
,
4441 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
4442 Vbyte_boolean_vars
= Qnil
;
4444 DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries
,
4445 doc
: /* Non-nil means load dangerous compiled Lisp files.
4446 Some versions of XEmacs use different byte codes than Emacs. These
4447 incompatible byte codes can make Emacs crash when it tries to execute
4449 load_dangerous_libraries
= 0;
4451 DEFVAR_BOOL ("force-load-messages", force_load_messages
,
4452 doc
: /* Non-nil means force printing messages when loading Lisp files.
4453 This overrides the value of the NOMESSAGE argument to `load'. */);
4454 force_load_messages
= 0;
4456 DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp
,
4457 doc
: /* Regular expression matching safe to load compiled Lisp files.
4458 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
4459 from the file, and matches them against this regular expression.
4460 When the regular expression matches, the file is considered to be safe
4461 to load. See also `load-dangerous-libraries'. */);
4462 Vbytecomp_version_regexp
4463 = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
4465 Qlexical_binding
= intern ("lexical-binding");
4466 staticpro (&Qlexical_binding
);
4467 DEFVAR_LISP ("lexical-binding", Vlexical_binding
,
4468 doc
: /* If non-nil, use lexical binding when evaluating code.
4469 This only applies to code evaluated by `eval-buffer' and `eval-region'.
4470 This variable is automatically set from the file variables of an interpreted
4471 lisp file read using `load'. */);
4472 Fmake_variable_buffer_local (Qlexical_binding
);
4474 DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list
,
4475 doc
: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
4476 Veval_buffer_list
= Qnil
;
4478 DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes
,
4479 doc
: /* Set to non-nil when `read' encounters an old-style backquote. */);
4480 Vold_style_backquotes
= Qnil
;
4481 Qold_style_backquotes
= intern_c_string ("old-style-backquotes");
4482 staticpro (&Qold_style_backquotes
);
4484 /* Vsource_directory was initialized in init_lread. */
4486 load_descriptor_list
= Qnil
;
4487 staticpro (&load_descriptor_list
);
4489 Qcurrent_load_list
= intern_c_string ("current-load-list");
4490 staticpro (&Qcurrent_load_list
);
4492 Qstandard_input
= intern_c_string ("standard-input");
4493 staticpro (&Qstandard_input
);
4495 Qread_char
= intern_c_string ("read-char");
4496 staticpro (&Qread_char
);
4498 Qget_file_char
= intern_c_string ("get-file-char");
4499 staticpro (&Qget_file_char
);
4501 Qget_emacs_mule_file_char
= intern_c_string ("get-emacs-mule-file-char");
4502 staticpro (&Qget_emacs_mule_file_char
);
4504 Qload_force_doc_strings
= intern_c_string ("load-force-doc-strings");
4505 staticpro (&Qload_force_doc_strings
);
4507 Qbackquote
= intern_c_string ("`");
4508 staticpro (&Qbackquote
);
4509 Qcomma
= intern_c_string (",");
4510 staticpro (&Qcomma
);
4511 Qcomma_at
= intern_c_string (",@");
4512 staticpro (&Qcomma_at
);
4513 Qcomma_dot
= intern_c_string (",.");
4514 staticpro (&Qcomma_dot
);
4516 Qinhibit_file_name_operation
= intern_c_string ("inhibit-file-name-operation");
4517 staticpro (&Qinhibit_file_name_operation
);
4519 Qascii_character
= intern_c_string ("ascii-character");
4520 staticpro (&Qascii_character
);
4522 Qfunction
= intern_c_string ("function");
4523 staticpro (&Qfunction
);
4525 Qload
= intern_c_string ("load");
4528 Qload_file_name
= intern_c_string ("load-file-name");
4529 staticpro (&Qload_file_name
);
4531 Qeval_buffer_list
= intern_c_string ("eval-buffer-list");
4532 staticpro (&Qeval_buffer_list
);
4534 Qfile_truename
= intern_c_string ("file-truename");
4535 staticpro (&Qfile_truename
) ;
4537 Qdir_ok
= intern_c_string ("dir-ok");
4538 staticpro (&Qdir_ok
);
4540 Qdo_after_load_evaluation
= intern_c_string ("do-after-load-evaluation");
4541 staticpro (&Qdo_after_load_evaluation
) ;
4543 staticpro (&dump_path
);
4545 staticpro (&read_objects
);
4546 read_objects
= Qnil
;
4547 staticpro (&seen_list
);
4550 Vloads_in_progress
= Qnil
;
4551 staticpro (&Vloads_in_progress
);
4553 Qhash_table
= intern_c_string ("hash-table");
4554 staticpro (&Qhash_table
);
4555 Qdata
= intern_c_string ("data");
4557 Qtest
= intern_c_string ("test");
4559 Qsize
= intern_c_string ("size");
4561 Qweakness
= intern_c_string ("weakness");
4562 staticpro (&Qweakness
);
4563 Qrehash_size
= intern_c_string ("rehash-size");
4564 staticpro (&Qrehash_size
);
4565 Qrehash_threshold
= intern_c_string ("rehash-threshold");
4566 staticpro (&Qrehash_threshold
);