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 (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 (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 (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 (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 (Lisp_Object filename
, Lisp_Object path
, Lisp_Object suffixes
, Lisp_Object predicate
)
1382 int fd
= openp (path
, filename
, suffixes
, &file
, predicate
);
1383 if (NILP (predicate
) && fd
> 0)
1389 /* Search for a file whose name is STR, looking in directories
1390 in the Lisp list PATH, and trying suffixes from SUFFIX.
1391 On success, returns a file descriptor. On failure, returns -1.
1393 SUFFIXES is a list of strings containing possible suffixes.
1394 The empty suffix is automatically added if the list is empty.
1396 PREDICATE non-nil means don't open the files,
1397 just look for one that satisfies the predicate. In this case,
1398 returns 1 on success. The predicate can be a lisp function or
1399 an integer to pass to `access' (in which case file-name-handlers
1402 If STOREPTR is nonzero, it points to a slot where the name of
1403 the file actually found should be stored as a Lisp string.
1404 nil is stored there on failure.
1406 If the file we find is remote, return -2
1407 but store the found remote file name in *STOREPTR. */
1410 openp (Lisp_Object path
, Lisp_Object str
, Lisp_Object suffixes
, Lisp_Object
*storeptr
, Lisp_Object predicate
)
1415 register char *fn
= buf
;
1418 Lisp_Object filename
;
1420 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
, gcpro6
;
1421 Lisp_Object string
, tail
, encoded_fn
;
1422 int max_suffix_len
= 0;
1426 for (tail
= suffixes
; CONSP (tail
); tail
= XCDR (tail
))
1428 CHECK_STRING_CAR (tail
);
1429 max_suffix_len
= max (max_suffix_len
,
1430 SBYTES (XCAR (tail
)));
1433 string
= filename
= encoded_fn
= Qnil
;
1434 GCPRO6 (str
, string
, filename
, path
, suffixes
, encoded_fn
);
1439 if (complete_filename_p (str
))
1442 for (; CONSP (path
); path
= XCDR (path
))
1444 filename
= Fexpand_file_name (str
, XCAR (path
));
1445 if (!complete_filename_p (filename
))
1446 /* If there are non-absolute elts in PATH (eg ".") */
1447 /* Of course, this could conceivably lose if luser sets
1448 default-directory to be something non-absolute... */
1450 filename
= Fexpand_file_name (filename
, current_buffer
->directory
);
1451 if (!complete_filename_p (filename
))
1452 /* Give up on this path element! */
1456 /* Calculate maximum size of any filename made from
1457 this path element/specified file name and any possible suffix. */
1458 want_size
= max_suffix_len
+ SBYTES (filename
) + 1;
1459 if (fn_size
< want_size
)
1460 fn
= (char *) alloca (fn_size
= 100 + want_size
);
1462 /* Loop over suffixes. */
1463 for (tail
= NILP (suffixes
) ? Fcons (empty_unibyte_string
, Qnil
) : suffixes
;
1464 CONSP (tail
); tail
= XCDR (tail
))
1466 int lsuffix
= SBYTES (XCAR (tail
));
1467 Lisp_Object handler
;
1470 /* Concatenate path element/specified name with the suffix.
1471 If the directory starts with /:, remove that. */
1472 if (SCHARS (filename
) > 2
1473 && SREF (filename
, 0) == '/'
1474 && SREF (filename
, 1) == ':')
1476 strncpy (fn
, SSDATA (filename
) + 2,
1477 SBYTES (filename
) - 2);
1478 fn
[SBYTES (filename
) - 2] = 0;
1482 strncpy (fn
, SSDATA (filename
),
1484 fn
[SBYTES (filename
)] = 0;
1487 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
1488 strncat (fn
, SSDATA (XCAR (tail
)), lsuffix
);
1490 /* Check that the file exists and is not a directory. */
1491 /* We used to only check for handlers on non-absolute file names:
1495 handler = Ffind_file_name_handler (filename, Qfile_exists_p);
1496 It's not clear why that was the case and it breaks things like
1497 (load "/bar.el") where the file is actually "/bar.el.gz". */
1498 string
= build_string (fn
);
1499 handler
= Ffind_file_name_handler (string
, Qfile_exists_p
);
1500 if ((!NILP (handler
) || !NILP (predicate
)) && !NATNUMP (predicate
))
1502 if (NILP (predicate
))
1503 exists
= !NILP (Ffile_readable_p (string
));
1505 exists
= !NILP (call1 (predicate
, string
));
1506 if (exists
&& !NILP (Ffile_directory_p (string
)))
1511 /* We succeeded; return this descriptor and filename. */
1522 encoded_fn
= ENCODE_FILE (string
);
1523 pfn
= SSDATA (encoded_fn
);
1524 exists
= (stat (pfn
, &st
) >= 0
1525 && (st
.st_mode
& S_IFMT
) != S_IFDIR
);
1528 /* Check that we can access or open it. */
1529 if (NATNUMP (predicate
))
1530 fd
= (access (pfn
, XFASTINT (predicate
)) == 0) ? 1 : -1;
1532 fd
= emacs_open (pfn
, O_RDONLY
, 0);
1536 /* We succeeded; return this descriptor and filename. */
1554 /* Merge the list we've accumulated of globals from the current input source
1555 into the load_history variable. The details depend on whether
1556 the source has an associated file name or not.
1558 FILENAME is the file name that we are loading from.
1559 ENTIRE is 1 if loading that entire file, 0 if evaluating part of it. */
1562 build_load_history (Lisp_Object filename
, int entire
)
1564 register Lisp_Object tail
, prev
, newelt
;
1565 register Lisp_Object tem
, tem2
;
1566 register int foundit
= 0;
1568 tail
= Vload_history
;
1571 while (CONSP (tail
))
1575 /* Find the feature's previous assoc list... */
1576 if (!NILP (Fequal (filename
, Fcar (tem
))))
1580 /* If we're loading the entire file, remove old data. */
1584 Vload_history
= XCDR (tail
);
1586 Fsetcdr (prev
, XCDR (tail
));
1589 /* Otherwise, cons on new symbols that are not already members. */
1592 tem2
= Vcurrent_load_list
;
1594 while (CONSP (tem2
))
1596 newelt
= XCAR (tem2
);
1598 if (NILP (Fmember (newelt
, tem
)))
1599 Fsetcar (tail
, Fcons (XCAR (tem
),
1600 Fcons (newelt
, XCDR (tem
))));
1613 /* If we're loading an entire file, cons the new assoc onto the
1614 front of load-history, the most-recently-loaded position. Also
1615 do this if we didn't find an existing member for the file. */
1616 if (entire
|| !foundit
)
1617 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
1622 unreadpure (Lisp_Object junk
) /* Used as unwind-protect function in readevalloop */
1629 readevalloop_1 (Lisp_Object old
)
1631 load_convert_to_unibyte
= ! NILP (old
);
1635 /* Signal an `end-of-file' error, if possible with file name
1639 end_of_file_error (void)
1641 if (STRINGP (Vload_file_name
))
1642 xsignal1 (Qend_of_file
, Vload_file_name
);
1644 xsignal0 (Qend_of_file
);
1647 /* UNIBYTE specifies how to set load_convert_to_unibyte
1648 for this invocation.
1649 READFUN, if non-nil, is used instead of `read'.
1651 START, END specify region to read in current buffer (from eval-region).
1652 If the input is not from a buffer, they must be nil. */
1655 readevalloop (Lisp_Object readcharfun
,
1657 Lisp_Object sourcename
,
1659 Lisp_Object unibyte
, Lisp_Object readfun
,
1660 Lisp_Object start
, Lisp_Object end
)
1663 register Lisp_Object val
;
1664 int count
= SPECPDL_INDEX ();
1665 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1666 struct buffer
*b
= 0;
1667 int continue_reading_p
;
1668 Lisp_Object lex_bound
;
1669 /* Nonzero if reading an entire buffer. */
1670 int whole_buffer
= 0;
1671 /* 1 on the first time around. */
1674 if (MARKERP (readcharfun
))
1677 start
= readcharfun
;
1680 if (BUFFERP (readcharfun
))
1681 b
= XBUFFER (readcharfun
);
1682 else if (MARKERP (readcharfun
))
1683 b
= XMARKER (readcharfun
)->buffer
;
1685 /* We assume START is nil when input is not from a buffer. */
1686 if (! NILP (start
) && !b
)
1689 specbind (Qstandard_input
, readcharfun
); /* GCPROs readcharfun. */
1690 specbind (Qcurrent_load_list
, Qnil
);
1691 record_unwind_protect (readevalloop_1
, load_convert_to_unibyte
? Qt
: Qnil
);
1692 load_convert_to_unibyte
= !NILP (unibyte
);
1694 /* If lexical binding is active (either because it was specified in
1695 the file's header, or via a buffer-local variable), create an empty
1696 lexical environment, otherwise, turn off lexical binding. */
1697 lex_bound
= find_symbol_value (Qlexical_binding
);
1698 specbind (Qinternal_interpreter_environment
,
1699 NILP (lex_bound
) || EQ (lex_bound
, Qunbound
)
1700 ? Qnil
: Fcons (Qt
, Qnil
));
1702 GCPRO4 (sourcename
, readfun
, start
, end
);
1704 /* Try to ensure sourcename is a truename, except whilst preloading. */
1705 if (NILP (Vpurify_flag
)
1706 && !NILP (sourcename
) && !NILP (Ffile_name_absolute_p (sourcename
))
1707 && !NILP (Ffboundp (Qfile_truename
)))
1708 sourcename
= call1 (Qfile_truename
, sourcename
) ;
1710 LOADHIST_ATTACH (sourcename
);
1712 continue_reading_p
= 1;
1713 while (continue_reading_p
)
1715 int count1
= SPECPDL_INDEX ();
1717 if (b
!= 0 && NILP (b
->name
))
1718 error ("Reading from killed buffer");
1722 /* Switch to the buffer we are reading from. */
1723 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1724 set_buffer_internal (b
);
1726 /* Save point in it. */
1727 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1728 /* Save ZV in it. */
1729 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1730 /* Those get unbound after we read one expression. */
1732 /* Set point and ZV around stuff to be read. */
1735 Fnarrow_to_region (make_number (BEGV
), end
);
1737 /* Just for cleanliness, convert END to a marker
1738 if it is an integer. */
1740 end
= Fpoint_max_marker ();
1743 /* On the first cycle, we can easily test here
1744 whether we are reading the whole buffer. */
1745 if (b
&& first_sexp
)
1746 whole_buffer
= (PT
== BEG
&& ZV
== Z
);
1753 while ((c
= READCHAR
) != '\n' && c
!= -1);
1758 unbind_to (count1
, Qnil
);
1762 /* Ignore whitespace here, so we can detect eof. */
1763 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r'
1764 || c
== 0x8a0) /* NBSP */
1767 if (!NILP (Vpurify_flag
) && c
== '(')
1769 record_unwind_protect (unreadpure
, Qnil
);
1770 val
= read_list (-1, readcharfun
);
1775 read_objects
= Qnil
;
1776 if (!NILP (readfun
))
1778 val
= call1 (readfun
, readcharfun
);
1780 /* If READCHARFUN has set point to ZV, we should
1781 stop reading, even if the form read sets point
1782 to a different value when evaluated. */
1783 if (BUFFERP (readcharfun
))
1785 struct buffer
*b
= XBUFFER (readcharfun
);
1786 if (BUF_PT (b
) == BUF_ZV (b
))
1787 continue_reading_p
= 0;
1790 else if (! NILP (Vload_read_function
))
1791 val
= call1 (Vload_read_function
, readcharfun
);
1793 val
= read_internal_start (readcharfun
, Qnil
, Qnil
);
1796 if (!NILP (start
) && continue_reading_p
)
1797 start
= Fpoint_marker ();
1799 /* Restore saved point and BEGV. */
1800 unbind_to (count1
, Qnil
);
1802 /* Now eval what we just read. */
1803 val
= eval_sub (val
);
1807 Vvalues
= Fcons (val
, Vvalues
);
1808 if (EQ (Vstandard_output
, Qt
))
1817 build_load_history (sourcename
,
1818 stream
|| whole_buffer
);
1822 unbind_to (count
, Qnil
);
1825 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 5, "",
1826 doc
: /* Execute the current buffer as Lisp code.
1827 When called from a Lisp program (i.e., not interactively), this
1828 function accepts up to five optional arguments:
1829 BUFFER is the buffer to evaluate (nil means use current buffer).
1830 PRINTFLAG controls printing of output:
1831 A value of nil means discard it; anything else is stream for print.
1832 FILENAME specifies the file name to use for `load-history'.
1833 UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this
1835 DO-ALLOW-PRINT, if non-nil, specifies that `print' and related
1836 functions should work normally even if PRINTFLAG is nil.
1838 This function preserves the position of point. */)
1839 (Lisp_Object buffer
, Lisp_Object printflag
, Lisp_Object filename
, Lisp_Object unibyte
, Lisp_Object do_allow_print
)
1841 int count
= SPECPDL_INDEX ();
1842 Lisp_Object tem
, buf
;
1845 buf
= Fcurrent_buffer ();
1847 buf
= Fget_buffer (buffer
);
1849 error ("No such buffer");
1851 if (NILP (printflag
) && NILP (do_allow_print
))
1856 if (NILP (filename
))
1857 filename
= XBUFFER (buf
)->filename
;
1859 specbind (Qeval_buffer_list
, Fcons (buf
, Veval_buffer_list
));
1860 specbind (Qstandard_output
, tem
);
1861 specbind (Qlexical_binding
, Qnil
);
1862 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1863 BUF_TEMP_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
1864 if (lisp_file_lexically_bound_p (buf
))
1865 Fset (Qlexical_binding
, Qt
);
1866 readevalloop (buf
, 0, filename
,
1867 !NILP (printflag
), unibyte
, Qnil
, Qnil
, Qnil
);
1868 unbind_to (count
, Qnil
);
1873 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 4, "r",
1874 doc
: /* Execute the region as Lisp code.
1875 When called from programs, expects two arguments,
1876 giving starting and ending indices in the current buffer
1877 of the text to be executed.
1878 Programs can pass third argument PRINTFLAG which controls output:
1879 A value of nil means discard it; anything else is stream for printing it.
1880 Also the fourth argument READ-FUNCTION, if non-nil, is used
1881 instead of `read' to read each expression. It gets one argument
1882 which is the input stream for reading characters.
1884 This function does not move point. */)
1885 (Lisp_Object start
, Lisp_Object end
, Lisp_Object printflag
, Lisp_Object read_function
)
1887 int count
= SPECPDL_INDEX ();
1888 Lisp_Object tem
, cbuf
;
1890 cbuf
= Fcurrent_buffer ();
1892 if (NILP (printflag
))
1896 specbind (Qstandard_output
, tem
);
1897 specbind (Qeval_buffer_list
, Fcons (cbuf
, Veval_buffer_list
));
1899 /* readevalloop calls functions which check the type of start and end. */
1900 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
,
1901 !NILP (printflag
), Qnil
, read_function
,
1904 return unbind_to (count
, Qnil
);
1908 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
1909 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
1910 If STREAM is nil, use the value of `standard-input' (which see).
1911 STREAM or the value of `standard-input' may be:
1912 a buffer (read from point and advance it)
1913 a marker (read from where it points and advance it)
1914 a function (call it with no arguments for each character,
1915 call it with a char as argument to push a char back)
1916 a string (takes text from string, starting at the beginning)
1917 t (read text line using minibuffer and use it, or read from
1918 standard input in batch mode). */)
1919 (Lisp_Object stream
)
1922 stream
= Vstandard_input
;
1923 if (EQ (stream
, Qt
))
1924 stream
= Qread_char
;
1925 if (EQ (stream
, Qread_char
))
1926 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
1928 return read_internal_start (stream
, Qnil
, Qnil
);
1931 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
1932 doc
: /* Read one Lisp expression which is represented as text by STRING.
1933 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1934 START and END optionally delimit a substring of STRING from which to read;
1935 they default to 0 and (length STRING) respectively. */)
1936 (Lisp_Object string
, Lisp_Object start
, Lisp_Object end
)
1939 CHECK_STRING (string
);
1940 /* read_internal_start sets read_from_string_index. */
1941 ret
= read_internal_start (string
, start
, end
);
1942 return Fcons (ret
, make_number (read_from_string_index
));
1945 /* Function to set up the global context we need in toplevel read
1948 read_internal_start (Lisp_Object stream
, Lisp_Object start
, Lisp_Object end
)
1949 /* start, end only used when stream is a string. */
1954 new_backquote_flag
= 0;
1955 read_objects
= Qnil
;
1956 if (EQ (Vread_with_symbol_positions
, Qt
)
1957 || EQ (Vread_with_symbol_positions
, stream
))
1958 Vread_symbol_positions_list
= Qnil
;
1960 if (STRINGP (stream
)
1961 || ((CONSP (stream
) && STRINGP (XCAR (stream
)))))
1963 EMACS_INT startval
, endval
;
1966 if (STRINGP (stream
))
1969 string
= XCAR (stream
);
1972 endval
= SCHARS (string
);
1976 endval
= XINT (end
);
1977 if (endval
< 0 || endval
> SCHARS (string
))
1978 args_out_of_range (string
, end
);
1985 CHECK_NUMBER (start
);
1986 startval
= XINT (start
);
1987 if (startval
< 0 || startval
> endval
)
1988 args_out_of_range (string
, start
);
1990 read_from_string_index
= startval
;
1991 read_from_string_index_byte
= string_char_to_byte (string
, startval
);
1992 read_from_string_limit
= endval
;
1995 retval
= read0 (stream
);
1996 if (EQ (Vread_with_symbol_positions
, Qt
)
1997 || EQ (Vread_with_symbol_positions
, stream
))
1998 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
2003 /* Signal Qinvalid_read_syntax error.
2004 S is error string of length N (if > 0) */
2007 invalid_syntax (const char *s
, int n
)
2011 xsignal1 (Qinvalid_read_syntax
, make_string (s
, n
));
2015 /* Use this for recursive reads, in contexts where internal tokens
2019 read0 (Lisp_Object readcharfun
)
2021 register Lisp_Object val
;
2024 val
= read1 (readcharfun
, &c
, 0);
2028 xsignal1 (Qinvalid_read_syntax
,
2029 Fmake_string (make_number (1), make_number (c
)));
2032 static int read_buffer_size
;
2033 static char *read_buffer
;
2035 /* Read a \-escape sequence, assuming we already read the `\'.
2036 If the escape sequence forces unibyte, return eight-bit char. */
2039 read_escape (Lisp_Object readcharfun
, int stringp
)
2041 register int c
= READCHAR
;
2042 /* \u allows up to four hex digits, \U up to eight. Default to the
2043 behavior for \u, and change this value in the case that \U is seen. */
2044 int unicode_hex_count
= 4;
2049 end_of_file_error ();
2079 error ("Invalid escape character syntax");
2082 c
= read_escape (readcharfun
, 0);
2083 return c
| meta_modifier
;
2088 error ("Invalid escape character syntax");
2091 c
= read_escape (readcharfun
, 0);
2092 return c
| shift_modifier
;
2097 error ("Invalid escape character syntax");
2100 c
= read_escape (readcharfun
, 0);
2101 return c
| hyper_modifier
;
2106 error ("Invalid escape character syntax");
2109 c
= read_escape (readcharfun
, 0);
2110 return c
| alt_modifier
;
2114 if (stringp
|| c
!= '-')
2121 c
= read_escape (readcharfun
, 0);
2122 return c
| super_modifier
;
2127 error ("Invalid escape character syntax");
2131 c
= read_escape (readcharfun
, 0);
2132 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
2133 return 0177 | (c
& CHAR_MODIFIER_MASK
);
2134 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
2135 return c
| ctrl_modifier
;
2136 /* ASCII control chars are made from letters (both cases),
2137 as well as the non-letters within 0100...0137. */
2138 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
2139 return (c
& (037 | ~0177));
2140 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
2141 return (c
& (037 | ~0177));
2143 return c
| ctrl_modifier
;
2153 /* An octal escape, as in ANSI C. */
2155 register int i
= c
- '0';
2156 register int count
= 0;
2159 if ((c
= READCHAR
) >= '0' && c
<= '7')
2171 if (i
>= 0x80 && i
< 0x100)
2172 i
= BYTE8_TO_CHAR (i
);
2177 /* A hex escape, as in ANSI C. */
2184 if (c
>= '0' && c
<= '9')
2189 else if ((c
>= 'a' && c
<= 'f')
2190 || (c
>= 'A' && c
<= 'F'))
2193 if (c
>= 'a' && c
<= 'f')
2206 if (count
< 3 && i
>= 0x80)
2207 return BYTE8_TO_CHAR (i
);
2212 /* Post-Unicode-2.0: Up to eight hex chars. */
2213 unicode_hex_count
= 8;
2216 /* A Unicode escape. We only permit them in strings and characters,
2217 not arbitrarily in the source code, as in some other languages. */
2222 while (++count
<= unicode_hex_count
)
2225 /* isdigit and isalpha may be locale-specific, which we don't
2227 if (c
>= '0' && c
<= '9') i
= (i
<< 4) + (c
- '0');
2228 else if (c
>= 'a' && c
<= 'f') i
= (i
<< 4) + (c
- 'a') + 10;
2229 else if (c
>= 'A' && c
<= 'F') i
= (i
<< 4) + (c
- 'A') + 10;
2232 error ("Non-hex digit used for Unicode escape");
2237 error ("Non-Unicode character: 0x%x", i
);
2246 /* Read an integer in radix RADIX using READCHARFUN to read
2247 characters. RADIX must be in the interval [2..36]; if it isn't, a
2248 read error is signaled . Value is the integer read. Signals an
2249 error if encountering invalid read syntax or if RADIX is out of
2253 read_integer (Lisp_Object readcharfun
, int radix
)
2255 int ndigits
= 0, invalid_p
, c
, sign
= 0;
2256 /* We use a floating point number because */
2259 if (radix
< 2 || radix
> 36)
2263 number
= ndigits
= invalid_p
= 0;
2279 if (c
>= '0' && c
<= '9')
2281 else if (c
>= 'a' && c
<= 'z')
2282 digit
= c
- 'a' + 10;
2283 else if (c
>= 'A' && c
<= 'Z')
2284 digit
= c
- 'A' + 10;
2291 if (digit
< 0 || digit
>= radix
)
2294 number
= radix
* number
+ digit
;
2300 if (ndigits
== 0 || invalid_p
)
2303 sprintf (buf
, "integer, radix %d", radix
);
2304 invalid_syntax (buf
, 0);
2307 return make_fixnum_or_float (sign
* number
);
2311 /* If the next token is ')' or ']' or '.', we store that character
2312 in *PCH and the return value is not interesting. Else, we store
2313 zero in *PCH and we read and return one lisp object.
2315 FIRST_IN_LIST is nonzero if this is the first element of a list. */
2318 read1 (register Lisp_Object readcharfun
, int *pch
, int first_in_list
)
2321 int uninterned_symbol
= 0;
2329 c
= READCHAR_REPORT_MULTIBYTE (&multibyte
);
2331 end_of_file_error ();
2336 return read_list (0, readcharfun
);
2339 return read_vector (readcharfun
, 0);
2355 /* Accept extended format for hashtables (extensible to
2357 #s(hash-table size 2 test equal data (k1 v1 k2 v2)) */
2358 Lisp_Object tmp
= read_list (0, readcharfun
);
2359 Lisp_Object head
= CAR_SAFE (tmp
);
2360 Lisp_Object data
= Qnil
;
2361 Lisp_Object val
= Qnil
;
2362 /* The size is 2 * number of allowed keywords to
2364 Lisp_Object params
[10];
2366 Lisp_Object key
= Qnil
;
2367 int param_count
= 0;
2369 if (!EQ (head
, Qhash_table
))
2370 error ("Invalid extended read marker at head of #s list "
2371 "(only hash-table allowed)");
2373 tmp
= CDR_SAFE (tmp
);
2375 /* This is repetitive but fast and simple. */
2376 params
[param_count
] = QCsize
;
2377 params
[param_count
+1] = Fplist_get (tmp
, Qsize
);
2378 if (!NILP (params
[param_count
+ 1]))
2381 params
[param_count
] = QCtest
;
2382 params
[param_count
+1] = Fplist_get (tmp
, Qtest
);
2383 if (!NILP (params
[param_count
+ 1]))
2386 params
[param_count
] = QCweakness
;
2387 params
[param_count
+1] = Fplist_get (tmp
, Qweakness
);
2388 if (!NILP (params
[param_count
+ 1]))
2391 params
[param_count
] = QCrehash_size
;
2392 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_size
);
2393 if (!NILP (params
[param_count
+ 1]))
2396 params
[param_count
] = QCrehash_threshold
;
2397 params
[param_count
+1] = Fplist_get (tmp
, Qrehash_threshold
);
2398 if (!NILP (params
[param_count
+ 1]))
2401 /* This is the hashtable data. */
2402 data
= Fplist_get (tmp
, Qdata
);
2404 /* Now use params to make a new hashtable and fill it. */
2405 ht
= Fmake_hash_table (param_count
, params
);
2407 while (CONSP (data
))
2412 error ("Odd number of elements in hashtable data");
2415 Fputhash (key
, val
, ht
);
2421 invalid_syntax ("#", 1);
2429 tmp
= read_vector (readcharfun
, 0);
2430 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
)
2431 error ("Invalid size char-table");
2432 XSETPVECTYPE (XVECTOR (tmp
), PVEC_CHAR_TABLE
);
2443 tmp
= read_vector (readcharfun
, 0);
2444 if (!INTEGERP (AREF (tmp
, 0)))
2445 error ("Invalid depth in char-table");
2446 depth
= XINT (AREF (tmp
, 0));
2447 if (depth
< 1 || depth
> 3)
2448 error ("Invalid depth in char-table");
2449 size
= XVECTOR (tmp
)->size
- 2;
2450 if (chartab_size
[depth
] != size
)
2451 error ("Invalid size char-table");
2452 XSETPVECTYPE (XVECTOR (tmp
), PVEC_SUB_CHAR_TABLE
);
2455 invalid_syntax ("#^^", 3);
2457 invalid_syntax ("#^", 2);
2462 length
= read1 (readcharfun
, pch
, first_in_list
);
2466 Lisp_Object tmp
, val
;
2468 = ((XFASTINT (length
) + BOOL_VECTOR_BITS_PER_CHAR
- 1)
2469 / BOOL_VECTOR_BITS_PER_CHAR
);
2472 tmp
= read1 (readcharfun
, pch
, first_in_list
);
2473 if (STRING_MULTIBYTE (tmp
)
2474 || (size_in_chars
!= SCHARS (tmp
)
2475 /* We used to print 1 char too many
2476 when the number of bits was a multiple of 8.
2477 Accept such input in case it came from an old
2479 && ! (XFASTINT (length
)
2480 == (SCHARS (tmp
) - 1) * BOOL_VECTOR_BITS_PER_CHAR
)))
2481 invalid_syntax ("#&...", 5);
2483 val
= Fmake_bool_vector (length
, Qnil
);
2484 memcpy (XBOOL_VECTOR (val
)->data
, SDATA (tmp
), size_in_chars
);
2485 /* Clear the extraneous bits in the last byte. */
2486 if (XINT (length
) != size_in_chars
* BOOL_VECTOR_BITS_PER_CHAR
)
2487 XBOOL_VECTOR (val
)->data
[size_in_chars
- 1]
2488 &= (1 << (XINT (length
) % BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2491 invalid_syntax ("#&...", 5);
2494 /* `function vector' objects, including byte-compiled functions. */
2495 return read_vector (readcharfun
, 1);
2499 struct gcpro gcpro1
;
2502 /* Read the string itself. */
2503 tmp
= read1 (readcharfun
, &ch
, 0);
2504 if (ch
!= 0 || !STRINGP (tmp
))
2505 invalid_syntax ("#", 1);
2507 /* Read the intervals and their properties. */
2510 Lisp_Object beg
, end
, plist
;
2512 beg
= read1 (readcharfun
, &ch
, 0);
2517 end
= read1 (readcharfun
, &ch
, 0);
2519 plist
= read1 (readcharfun
, &ch
, 0);
2521 invalid_syntax ("Invalid string property list", 0);
2522 Fset_text_properties (beg
, end
, plist
, tmp
);
2528 /* #@NUMBER is used to skip NUMBER following characters.
2529 That's used in .elc files to skip over doc strings
2530 and function definitions. */
2536 /* Read a decimal integer. */
2537 while ((c
= READCHAR
) >= 0
2538 && c
>= '0' && c
<= '9')
2546 if (load_force_doc_strings
2547 && (EQ (readcharfun
, Qget_file_char
)
2548 || EQ (readcharfun
, Qget_emacs_mule_file_char
)))
2550 /* If we are supposed to force doc strings into core right now,
2551 record the last string that we skipped,
2552 and record where in the file it comes from. */
2554 /* But first exchange saved_doc_string
2555 with prev_saved_doc_string, so we save two strings. */
2557 char *temp
= saved_doc_string
;
2558 int temp_size
= saved_doc_string_size
;
2559 file_offset temp_pos
= saved_doc_string_position
;
2560 int temp_len
= saved_doc_string_length
;
2562 saved_doc_string
= prev_saved_doc_string
;
2563 saved_doc_string_size
= prev_saved_doc_string_size
;
2564 saved_doc_string_position
= prev_saved_doc_string_position
;
2565 saved_doc_string_length
= prev_saved_doc_string_length
;
2567 prev_saved_doc_string
= temp
;
2568 prev_saved_doc_string_size
= temp_size
;
2569 prev_saved_doc_string_position
= temp_pos
;
2570 prev_saved_doc_string_length
= temp_len
;
2573 if (saved_doc_string_size
== 0)
2575 saved_doc_string_size
= nskip
+ 100;
2576 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
2578 if (nskip
> saved_doc_string_size
)
2580 saved_doc_string_size
= nskip
+ 100;
2581 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
2582 saved_doc_string_size
);
2585 saved_doc_string_position
= file_tell (instream
);
2587 /* Copy that many characters into saved_doc_string. */
2588 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2589 saved_doc_string
[i
] = c
= READCHAR
;
2591 saved_doc_string_length
= i
;
2595 /* Skip that many characters. */
2596 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2605 /* #! appears at the beginning of an executable file.
2606 Skip the first line. */
2607 while (c
!= '\n' && c
>= 0)
2612 return Vload_file_name
;
2614 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
2615 /* #:foo is the uninterned symbol named foo. */
2618 uninterned_symbol
= 1;
2622 /* Reader forms that can reuse previously read objects. */
2623 if (c
>= '0' && c
<= '9')
2628 /* Read a non-negative integer. */
2629 while (c
>= '0' && c
<= '9')
2635 /* #n=object returns object, but associates it with n for #n#. */
2636 if (c
== '=' && !NILP (Vread_circle
))
2638 /* Make a placeholder for #n# to use temporarily */
2639 Lisp_Object placeholder
;
2642 placeholder
= Fcons (Qnil
, Qnil
);
2643 cell
= Fcons (make_number (n
), placeholder
);
2644 read_objects
= Fcons (cell
, read_objects
);
2646 /* Read the object itself. */
2647 tem
= read0 (readcharfun
);
2649 /* Now put it everywhere the placeholder was... */
2650 substitute_object_in_subtree (tem
, placeholder
);
2652 /* ...and #n# will use the real value from now on. */
2653 Fsetcdr (cell
, tem
);
2657 /* #n# returns a previously read object. */
2658 if (c
== '#' && !NILP (Vread_circle
))
2660 tem
= Fassq (make_number (n
), read_objects
);
2663 /* Fall through to error message. */
2665 else if (c
== 'r' || c
== 'R')
2666 return read_integer (readcharfun
, n
);
2668 /* Fall through to error message. */
2670 else if (c
== 'x' || c
== 'X')
2671 return read_integer (readcharfun
, 16);
2672 else if (c
== 'o' || c
== 'O')
2673 return read_integer (readcharfun
, 8);
2674 else if (c
== 'b' || c
== 'B')
2675 return read_integer (readcharfun
, 2);
2678 invalid_syntax ("#", 1);
2681 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2686 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
2691 int next_char
= READCHAR
;
2693 /* Transition from old-style to new-style:
2694 If we see "(`" it used to mean old-style, which usually works
2695 fine because ` should almost never appear in such a position
2696 for new-style. But occasionally we need "(`" to mean new
2697 style, so we try to distinguish the two by the fact that we
2698 can either write "( `foo" or "(` foo", where the first
2699 intends to use new-style whereas the second intends to use
2700 old-style. For Emacs-25, we should completely remove this
2701 first_in_list exception (old-style can still be obtained via
2703 if (!new_backquote_flag
&& first_in_list
&& next_char
== ' ')
2705 Vold_style_backquotes
= Qt
;
2712 new_backquote_flag
++;
2713 value
= read0 (readcharfun
);
2714 new_backquote_flag
--;
2716 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
2721 int next_char
= READCHAR
;
2723 /* Transition from old-style to new-style:
2724 It used to be impossible to have a new-style , other than within
2725 a new-style `. This is sufficient when ` and , are used in the
2726 normal way, but ` and , can also appear in args to macros that
2727 will not interpret them in the usual way, in which case , may be
2728 used without any ` anywhere near.
2729 So we now use the same heuristic as for backquote: old-style
2730 unquotes are only recognized when first on a list, and when
2731 followed by a space.
2732 Because it's more difficult to peak 2 chars ahead, a new-style
2733 ,@ can still not be used outside of a `, unless it's in the middle
2735 if (new_backquote_flag
2737 || (next_char
!= ' ' && next_char
!= '@'))
2739 Lisp_Object comma_type
= Qnil
;
2744 comma_type
= Qcomma_at
;
2746 comma_type
= Qcomma_dot
;
2749 if (ch
>= 0) UNREAD (ch
);
2750 comma_type
= Qcomma
;
2753 value
= read0 (readcharfun
);
2754 return Fcons (comma_type
, Fcons (value
, Qnil
));
2758 Vold_style_backquotes
= Qt
;
2770 end_of_file_error ();
2772 /* Accept `single space' syntax like (list ? x) where the
2773 whitespace character is SPC or TAB.
2774 Other literal whitespace like NL, CR, and FF are not accepted,
2775 as there are well-established escape sequences for these. */
2776 if (c
== ' ' || c
== '\t')
2777 return make_number (c
);
2780 c
= read_escape (readcharfun
, 0);
2781 modifiers
= c
& CHAR_MODIFIER_MASK
;
2782 c
&= ~CHAR_MODIFIER_MASK
;
2783 if (CHAR_BYTE8_P (c
))
2784 c
= CHAR_TO_BYTE8 (c
);
2787 next_char
= READCHAR
;
2788 ok
= (next_char
<= 040
2789 || (next_char
< 0200
2790 && (strchr ("\"';()[]#?`,.", next_char
))));
2793 return make_number (c
);
2795 invalid_syntax ("?", 1);
2800 char *p
= read_buffer
;
2801 char *end
= read_buffer
+ read_buffer_size
;
2803 /* Nonzero if we saw an escape sequence specifying
2804 a multibyte character. */
2805 int force_multibyte
= 0;
2806 /* Nonzero if we saw an escape sequence specifying
2807 a single-byte character. */
2808 int force_singlebyte
= 0;
2812 while ((c
= READCHAR
) >= 0
2815 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2817 int offset
= p
- read_buffer
;
2818 read_buffer
= (char *) xrealloc (read_buffer
,
2819 read_buffer_size
*= 2);
2820 p
= read_buffer
+ offset
;
2821 end
= read_buffer
+ read_buffer_size
;
2828 c
= read_escape (readcharfun
, 1);
2830 /* C is -1 if \ newline has just been seen */
2833 if (p
== read_buffer
)
2838 modifiers
= c
& CHAR_MODIFIER_MASK
;
2839 c
= c
& ~CHAR_MODIFIER_MASK
;
2841 if (CHAR_BYTE8_P (c
))
2842 force_singlebyte
= 1;
2843 else if (! ASCII_CHAR_P (c
))
2844 force_multibyte
= 1;
2845 else /* i.e. ASCII_CHAR_P (c) */
2847 /* Allow `\C- ' and `\C-?'. */
2848 if (modifiers
== CHAR_CTL
)
2851 c
= 0, modifiers
= 0;
2853 c
= 127, modifiers
= 0;
2855 if (modifiers
& CHAR_SHIFT
)
2857 /* Shift modifier is valid only with [A-Za-z]. */
2858 if (c
>= 'A' && c
<= 'Z')
2859 modifiers
&= ~CHAR_SHIFT
;
2860 else if (c
>= 'a' && c
<= 'z')
2861 c
-= ('a' - 'A'), modifiers
&= ~CHAR_SHIFT
;
2864 if (modifiers
& CHAR_META
)
2866 /* Move the meta bit to the right place for a
2868 modifiers
&= ~CHAR_META
;
2869 c
= BYTE8_TO_CHAR (c
| 0x80);
2870 force_singlebyte
= 1;
2874 /* Any modifiers remaining are invalid. */
2876 error ("Invalid modifier in string");
2877 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2881 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2882 if (CHAR_BYTE8_P (c
))
2883 force_singlebyte
= 1;
2884 else if (! ASCII_CHAR_P (c
))
2885 force_multibyte
= 1;
2891 end_of_file_error ();
2893 /* If purifying, and string starts with \ newline,
2894 return zero instead. This is for doc strings
2895 that we are really going to find in etc/DOC.nn.nn */
2896 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
2897 return make_number (0);
2899 if (force_multibyte
)
2900 /* READ_BUFFER already contains valid multibyte forms. */
2902 else if (force_singlebyte
)
2904 nchars
= str_as_unibyte ((unsigned char *) read_buffer
,
2906 p
= read_buffer
+ nchars
;
2909 /* Otherwise, READ_BUFFER contains only ASCII. */
2912 /* We want readchar_count to be the number of characters, not
2913 bytes. Hence we adjust for multibyte characters in the
2914 string. ... But it doesn't seem to be necessary, because
2915 READCHAR *does* read multibyte characters from buffers. */
2916 /* readchar_count -= (p - read_buffer) - nchars; */
2918 return make_pure_string (read_buffer
, nchars
, p
- read_buffer
,
2920 || (p
- read_buffer
!= nchars
)));
2921 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
2923 || (p
- read_buffer
!= nchars
)));
2928 int next_char
= READCHAR
;
2931 if (next_char
<= 040
2932 || (next_char
< 0200
2933 && (strchr ("\"';([#?`,", next_char
))))
2939 /* Otherwise, we fall through! Note that the atom-reading loop
2940 below will now loop at least once, assuring that we will not
2941 try to UNREAD two characters in a row. */
2945 if (c
<= 040) goto retry
;
2946 if (c
== 0x8a0) /* NBSP */
2949 char *p
= read_buffer
;
2953 char *end
= read_buffer
+ read_buffer_size
;
2957 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2959 int offset
= p
- read_buffer
;
2960 read_buffer
= (char *) xrealloc (read_buffer
,
2961 read_buffer_size
*= 2);
2962 p
= read_buffer
+ offset
;
2963 end
= read_buffer
+ read_buffer_size
;
2970 end_of_file_error ();
2975 p
+= CHAR_STRING (c
, (unsigned char *) p
);
2980 && c
!= 0x8a0 /* NBSP */
2982 || !(strchr ("\"';()[]#`,", c
))));
2986 int offset
= p
- read_buffer
;
2987 read_buffer
= (char *) xrealloc (read_buffer
,
2988 read_buffer_size
*= 2);
2989 p
= read_buffer
+ offset
;
2990 end
= read_buffer
+ read_buffer_size
;
2997 if (!quoted
&& !uninterned_symbol
)
3001 if (*p1
== '+' || *p1
== '-') p1
++;
3002 /* Is it an integer? */
3005 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
3006 /* Integers can have trailing decimal points. */
3007 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
3009 /* It is an integer. */
3014 /* EMACS_INT n = atol (read_buffer); */
3015 char *endptr
= NULL
;
3016 EMACS_INT n
= (errno
= 0,
3017 strtol (read_buffer
, &endptr
, 10));
3018 if (errno
== ERANGE
&& endptr
)
3021 = Fcons (make_string (read_buffer
,
3022 endptr
- read_buffer
),
3024 xsignal (Qoverflow_error
, args
);
3026 return make_fixnum_or_float (n
);
3030 if (isfloat_string (read_buffer
, 0))
3032 /* Compute NaN and infinities using 0.0 in a variable,
3033 to cope with compilers that think they are smarter
3039 /* Negate the value ourselves. This treats 0, NaNs,
3040 and infinity properly on IEEE floating point hosts,
3041 and works around a common bug where atof ("-0.0")
3043 int negative
= read_buffer
[0] == '-';
3045 /* The only way p[-1] can be 'F' or 'N', after isfloat_string
3046 returns 1, is if the input ends in e+INF or e+NaN. */
3053 value
= zero
/ zero
;
3055 /* If that made a "negative" NaN, negate it. */
3059 union { double d
; char c
[sizeof (double)]; } u_data
, u_minus_zero
;
3062 u_minus_zero
.d
= - 0.0;
3063 for (i
= 0; i
< sizeof (double); i
++)
3064 if (u_data
.c
[i
] & u_minus_zero
.c
[i
])
3070 /* Now VALUE is a positive NaN. */
3073 value
= atof (read_buffer
+ negative
);
3077 return make_float (negative
? - value
: value
);
3081 Lisp_Object name
, result
;
3082 EMACS_INT nbytes
= p
- read_buffer
;
3085 ? multibyte_chars_in_text ((unsigned char *) read_buffer
,
3089 if (uninterned_symbol
&& ! NILP (Vpurify_flag
))
3090 name
= make_pure_string (read_buffer
, nchars
, nbytes
, multibyte
);
3092 name
= make_specified_string (read_buffer
, nchars
, nbytes
,multibyte
);
3093 result
= (uninterned_symbol
? Fmake_symbol (name
)
3094 : Fintern (name
, Qnil
));
3096 if (EQ (Vread_with_symbol_positions
, Qt
)
3097 || EQ (Vread_with_symbol_positions
, readcharfun
))
3098 Vread_symbol_positions_list
=
3099 /* Kind of a hack; this will probably fail if characters
3100 in the symbol name were escaped. Not really a big
3102 Fcons (Fcons (result
,
3103 make_number (readchar_count
3104 - XFASTINT (Flength (Fsymbol_name (result
))))),
3105 Vread_symbol_positions_list
);
3113 /* List of nodes we've seen during substitute_object_in_subtree. */
3114 static Lisp_Object seen_list
;
3117 substitute_object_in_subtree (Lisp_Object object
, Lisp_Object placeholder
)
3119 Lisp_Object check_object
;
3121 /* We haven't seen any objects when we start. */
3124 /* Make all the substitutions. */
3126 = substitute_object_recurse (object
, placeholder
, object
);
3128 /* Clear seen_list because we're done with it. */
3131 /* The returned object here is expected to always eq the
3133 if (!EQ (check_object
, object
))
3134 error ("Unexpected mutation error in reader");
3137 /* Feval doesn't get called from here, so no gc protection is needed. */
3138 #define SUBSTITUTE(get_val, set_val) \
3140 Lisp_Object old_value = get_val; \
3141 Lisp_Object true_value \
3142 = substitute_object_recurse (object, placeholder, \
3145 if (!EQ (old_value, true_value)) \
3152 substitute_object_recurse (Lisp_Object object
, Lisp_Object placeholder
, Lisp_Object subtree
)
3154 /* If we find the placeholder, return the target object. */
3155 if (EQ (placeholder
, subtree
))
3158 /* If we've been to this node before, don't explore it again. */
3159 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
3162 /* If this node can be the entry point to a cycle, remember that
3163 we've seen it. It can only be such an entry point if it was made
3164 by #n=, which means that we can find it as a value in
3166 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
3167 seen_list
= Fcons (subtree
, seen_list
);
3169 /* Recurse according to subtree's type.
3170 Every branch must return a Lisp_Object. */
3171 switch (XTYPE (subtree
))
3173 case Lisp_Vectorlike
:
3176 if (BOOL_VECTOR_P (subtree
))
3177 return subtree
; /* No sub-objects anyway. */
3178 else if (CHAR_TABLE_P (subtree
) || SUB_CHAR_TABLE_P (subtree
)
3179 || COMPILEDP (subtree
))
3180 length
= ASIZE (subtree
) & PSEUDOVECTOR_SIZE_MASK
;
3181 else if (VECTORP (subtree
))
3182 length
= ASIZE (subtree
);
3184 /* An unknown pseudovector may contain non-Lisp fields, so we
3185 can't just blindly traverse all its fields. We used to call
3186 `Flength' which signaled `sequencep', so I just preserved this
3188 wrong_type_argument (Qsequencep
, subtree
);
3190 for (i
= 0; i
< length
; i
++)
3191 SUBSTITUTE (AREF (subtree
, i
),
3192 ASET (subtree
, i
, true_value
));
3198 SUBSTITUTE (XCAR (subtree
),
3199 XSETCAR (subtree
, true_value
));
3200 SUBSTITUTE (XCDR (subtree
),
3201 XSETCDR (subtree
, true_value
));
3207 /* Check for text properties in each interval.
3208 substitute_in_interval contains part of the logic. */
3210 INTERVAL root_interval
= STRING_INTERVALS (subtree
);
3211 Lisp_Object arg
= Fcons (object
, placeholder
);
3213 traverse_intervals_noorder (root_interval
,
3214 &substitute_in_interval
, arg
);
3219 /* Other types don't recurse any further. */
3225 /* Helper function for substitute_object_recurse. */
3227 substitute_in_interval (INTERVAL interval
, Lisp_Object arg
)
3229 Lisp_Object object
= Fcar (arg
);
3230 Lisp_Object placeholder
= Fcdr (arg
);
3232 SUBSTITUTE (interval
->plist
, interval
->plist
= true_value
);
3243 isfloat_string (const char *cp
, int ignore_trailing
)
3246 const char *start
= cp
;
3249 if (*cp
== '+' || *cp
== '-')
3252 if (*cp
>= '0' && *cp
<= '9')
3255 while (*cp
>= '0' && *cp
<= '9')
3263 if (*cp
>= '0' && *cp
<= '9')
3266 while (*cp
>= '0' && *cp
<= '9')
3269 if (*cp
== 'e' || *cp
== 'E')
3273 if (*cp
== '+' || *cp
== '-')
3277 if (*cp
>= '0' && *cp
<= '9')
3280 while (*cp
>= '0' && *cp
<= '9')
3283 else if (cp
== start
)
3285 else if (cp
[-1] == '+' && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
3290 else if (cp
[-1] == '+' && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
3296 return ((ignore_trailing
3297 || *cp
== 0 || *cp
== ' ' || *cp
== '\t' || *cp
== '\n'
3298 || *cp
== '\r' || *cp
== '\f')
3299 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
3300 || state
== (DOT_CHAR
|TRAIL_INT
)
3301 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
3302 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
3303 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
3308 read_vector (Lisp_Object readcharfun
, int read_funvec
)
3312 register Lisp_Object
*ptr
;
3313 register Lisp_Object tem
, item
, vector
;
3314 register struct Lisp_Cons
*otem
;
3316 /* If we're reading a funvec object we start out assuming it's also a
3317 byte-code object (a subset of funvecs), so we can do any special
3318 processing needed. If it's just an ordinary funvec object, we'll
3319 realize that as soon as we've read the first element. */
3320 int read_bytecode
= read_funvec
;
3322 tem
= read_list (1, readcharfun
);
3323 len
= Flength (tem
);
3324 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
3326 size
= XVECTOR (vector
)->size
;
3327 ptr
= XVECTOR (vector
)->contents
;
3328 for (i
= 0; i
< size
; i
++)
3332 /* If READ_BYTECODE is set, check whether this is really a byte-code
3333 object, or just an ordinary `funvec' object -- non-byte-code
3334 funvec objects use the same reader syntax. We can tell from the
3335 first element which one it is. */
3336 if (read_bytecode
&& i
== 0 && ! FUNVEC_COMPILED_TAG_P (item
))
3337 read_bytecode
= 0; /* Nope. */
3339 /* If `load-force-doc-strings' is t when reading a lazily-loaded
3340 bytecode object, the docstring containing the bytecode and
3341 constants values must be treated as unibyte and passed to
3342 Fread, to get the actual bytecode string and constants vector. */
3343 if (read_bytecode
&& load_force_doc_strings
)
3345 if (i
== COMPILED_BYTECODE
)
3347 if (!STRINGP (item
))
3348 error ("Invalid byte code");
3350 /* Delay handling the bytecode slot until we know whether
3351 it is lazily-loaded (we can tell by whether the
3352 constants slot is nil). */
3353 ptr
[COMPILED_CONSTANTS
] = item
;
3356 else if (i
== COMPILED_CONSTANTS
)
3358 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
3362 /* Coerce string to unibyte (like string-as-unibyte,
3363 but without generating extra garbage and
3364 guaranteeing no change in the contents). */
3365 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
3366 STRING_SET_UNIBYTE (bytestr
);
3368 item
= Fread (Fcons (bytestr
, readcharfun
));
3370 error ("Invalid byte code");
3372 otem
= XCONS (item
);
3373 bytestr
= XCAR (item
);
3378 /* Now handle the bytecode slot. */
3379 ptr
[COMPILED_BYTECODE
] = read_pure
? Fpurecopy (bytestr
) : bytestr
;
3381 else if (i
== COMPILED_DOC_STRING
3383 && ! STRING_MULTIBYTE (item
))
3385 if (EQ (readcharfun
, Qget_emacs_mule_file_char
))
3386 item
= Fdecode_coding_string (item
, Qemacs_mule
, Qnil
, Qnil
);
3388 item
= Fstring_as_multibyte (item
);
3391 ptr
[i
] = read_pure
? Fpurecopy (item
) : item
;
3397 if (read_bytecode
&& size
>= 4)
3398 /* Convert this vector to a bytecode object. */
3399 vector
= Fmake_byte_code (size
, XVECTOR (vector
)->contents
);
3400 else if (read_funvec
&& size
>= 1)
3401 /* Convert this vector to an ordinary funvec object. */
3402 XSETFUNVEC (vector
, XVECTOR (vector
));
3407 /* FLAG = 1 means check for ] to terminate rather than ) and .
3408 FLAG = -1 means check for starting with defun
3409 and make structure pure. */
3412 read_list (int flag
, register Lisp_Object readcharfun
)
3414 /* -1 means check next element for defun,
3415 0 means don't check,
3416 1 means already checked and found defun. */
3417 int defunflag
= flag
< 0 ? -1 : 0;
3418 Lisp_Object val
, tail
;
3419 register Lisp_Object elt
, tem
;
3420 struct gcpro gcpro1
, gcpro2
;
3421 /* 0 is the normal case.
3422 1 means this list is a doc reference; replace it with the number 0.
3423 2 means this list is a doc reference; replace it with the doc string. */
3424 int doc_reference
= 0;
3426 /* Initialize this to 1 if we are reading a list. */
3427 int first_in_list
= flag
<= 0;
3436 elt
= read1 (readcharfun
, &ch
, first_in_list
);
3441 /* While building, if the list starts with #$, treat it specially. */
3442 if (EQ (elt
, Vload_file_name
)
3444 && !NILP (Vpurify_flag
))
3446 if (NILP (Vdoc_file_name
))
3447 /* We have not yet called Snarf-documentation, so assume
3448 this file is described in the DOC-MM.NN file
3449 and Snarf-documentation will fill in the right value later.
3450 For now, replace the whole list with 0. */
3453 /* We have already called Snarf-documentation, so make a relative
3454 file name for this file, so it can be found properly
3455 in the installed Lisp directory.
3456 We don't use Fexpand_file_name because that would make
3457 the directory absolute now. */
3458 elt
= concat2 (build_string ("../lisp/"),
3459 Ffile_name_nondirectory (elt
));
3461 else if (EQ (elt
, Vload_file_name
)
3463 && load_force_doc_strings
)
3472 invalid_syntax (") or . in a vector", 18);
3480 XSETCDR (tail
, read0 (readcharfun
));
3482 val
= read0 (readcharfun
);
3483 read1 (readcharfun
, &ch
, 0);
3487 if (doc_reference
== 1)
3488 return make_number (0);
3489 if (doc_reference
== 2)
3491 /* Get a doc string from the file we are loading.
3492 If it's in saved_doc_string, get it from there.
3494 Here, we don't know if the string is a
3495 bytecode string or a doc string. As a
3496 bytecode string must be unibyte, we always
3497 return a unibyte string. If it is actually a
3498 doc string, caller must make it
3501 int pos
= XINT (XCDR (val
));
3502 /* Position is negative for user variables. */
3503 if (pos
< 0) pos
= -pos
;
3504 if (pos
>= saved_doc_string_position
3505 && pos
< (saved_doc_string_position
3506 + saved_doc_string_length
))
3508 int start
= pos
- saved_doc_string_position
;
3511 /* Process quoting with ^A,
3512 and find the end of the string,
3513 which is marked with ^_ (037). */
3514 for (from
= start
, to
= start
;
3515 saved_doc_string
[from
] != 037;)
3517 int c
= saved_doc_string
[from
++];
3520 c
= saved_doc_string
[from
++];
3522 saved_doc_string
[to
++] = c
;
3524 saved_doc_string
[to
++] = 0;
3526 saved_doc_string
[to
++] = 037;
3529 saved_doc_string
[to
++] = c
;
3532 return make_unibyte_string (saved_doc_string
+ start
,
3535 /* Look in prev_saved_doc_string the same way. */
3536 else if (pos
>= prev_saved_doc_string_position
3537 && pos
< (prev_saved_doc_string_position
3538 + prev_saved_doc_string_length
))
3540 int start
= pos
- prev_saved_doc_string_position
;
3543 /* Process quoting with ^A,
3544 and find the end of the string,
3545 which is marked with ^_ (037). */
3546 for (from
= start
, to
= start
;
3547 prev_saved_doc_string
[from
] != 037;)
3549 int c
= prev_saved_doc_string
[from
++];
3552 c
= prev_saved_doc_string
[from
++];
3554 prev_saved_doc_string
[to
++] = c
;
3556 prev_saved_doc_string
[to
++] = 0;
3558 prev_saved_doc_string
[to
++] = 037;
3561 prev_saved_doc_string
[to
++] = c
;
3564 return make_unibyte_string (prev_saved_doc_string
3569 return get_doc_string (val
, 1, 0);
3574 invalid_syntax (". in wrong context", 18);
3576 invalid_syntax ("] in a list", 11);
3578 tem
= (read_pure
&& flag
<= 0
3579 ? pure_cons (elt
, Qnil
)
3580 : Fcons (elt
, Qnil
));
3582 XSETCDR (tail
, tem
);
3587 defunflag
= EQ (elt
, Qdefun
);
3588 else if (defunflag
> 0)
3593 Lisp_Object initial_obarray
;
3595 /* oblookup stores the bucket number here, for the sake of Funintern. */
3597 int oblookup_last_bucket_number
;
3599 static int hash_string (const char *ptr
, int len
);
3601 /* Get an error if OBARRAY is not an obarray.
3602 If it is one, return it. */
3605 check_obarray (Lisp_Object obarray
)
3607 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3609 /* If Vobarray is now invalid, force it to be valid. */
3610 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3611 wrong_type_argument (Qvectorp
, obarray
);
3616 /* Intern the C string STR: return a symbol with that name,
3617 interned in the current obarray. */
3620 intern (const char *str
)
3623 int len
= strlen (str
);
3624 Lisp_Object obarray
;
3627 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3628 obarray
= check_obarray (obarray
);
3629 tem
= oblookup (obarray
, str
, len
, len
);
3632 return Fintern (make_string (str
, len
), obarray
);
3636 intern_c_string (const char *str
)
3639 int len
= strlen (str
);
3640 Lisp_Object obarray
;
3643 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3644 obarray
= check_obarray (obarray
);
3645 tem
= oblookup (obarray
, str
, len
, len
);
3649 if (NILP (Vpurify_flag
))
3650 /* Creating a non-pure string from a string literal not
3651 implemented yet. We could just use make_string here and live
3652 with the extra copy. */
3655 return Fintern (make_pure_c_string (str
), obarray
);
3658 /* Create an uninterned symbol with name STR. */
3661 make_symbol (const char *str
)
3663 int len
= strlen (str
);
3665 return Fmake_symbol (!NILP (Vpurify_flag
)
3666 ? make_pure_string (str
, len
, len
, 0)
3667 : make_string (str
, len
));
3670 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3671 doc
: /* Return the canonical symbol whose name is STRING.
3672 If there is none, one is created by this function and returned.
3673 A second optional argument specifies the obarray to use;
3674 it defaults to the value of `obarray'. */)
3675 (Lisp_Object string
, Lisp_Object obarray
)
3677 register Lisp_Object tem
, sym
, *ptr
;
3679 if (NILP (obarray
)) obarray
= Vobarray
;
3680 obarray
= check_obarray (obarray
);
3682 CHECK_STRING (string
);
3684 tem
= oblookup (obarray
, SSDATA (string
),
3687 if (!INTEGERP (tem
))
3690 if (!NILP (Vpurify_flag
))
3691 string
= Fpurecopy (string
);
3692 sym
= Fmake_symbol (string
);
3694 if (EQ (obarray
, initial_obarray
))
3695 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3697 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED
;
3699 if ((SREF (string
, 0) == ':')
3700 && EQ (obarray
, initial_obarray
))
3702 XSYMBOL (sym
)->constant
= 1;
3703 XSYMBOL (sym
)->redirect
= SYMBOL_PLAINVAL
;
3704 SET_SYMBOL_VAL (XSYMBOL (sym
), sym
);
3707 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
3709 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
3711 XSYMBOL (sym
)->next
= 0;
3716 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3717 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3718 NAME may be a string or a symbol. If it is a symbol, that exact
3719 symbol is searched for.
3720 A second optional argument specifies the obarray to use;
3721 it defaults to the value of `obarray'. */)
3722 (Lisp_Object name
, Lisp_Object obarray
)
3724 register Lisp_Object tem
, string
;
3726 if (NILP (obarray
)) obarray
= Vobarray
;
3727 obarray
= check_obarray (obarray
);
3729 if (!SYMBOLP (name
))
3731 CHECK_STRING (name
);
3735 string
= SYMBOL_NAME (name
);
3737 tem
= oblookup (obarray
, SSDATA (string
), SCHARS (string
), SBYTES (string
));
3738 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3744 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3745 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3746 The value is t if a symbol was found and deleted, nil otherwise.
3747 NAME may be a string or a symbol. If it is a symbol, that symbol
3748 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3749 OBARRAY defaults to the value of the variable `obarray'. */)
3750 (Lisp_Object name
, Lisp_Object obarray
)
3752 register Lisp_Object string
, tem
;
3755 if (NILP (obarray
)) obarray
= Vobarray
;
3756 obarray
= check_obarray (obarray
);
3759 string
= SYMBOL_NAME (name
);
3762 CHECK_STRING (name
);
3766 tem
= oblookup (obarray
, SSDATA (string
),
3771 /* If arg was a symbol, don't delete anything but that symbol itself. */
3772 if (SYMBOLP (name
) && !EQ (name
, tem
))
3775 /* There are plenty of other symbols which will screw up the Emacs
3776 session if we unintern them, as well as even more ways to use
3777 `setq' or `fset' or whatnot to make the Emacs session
3778 unusable. Let's not go down this silly road. --Stef */
3779 /* if (EQ (tem, Qnil) || EQ (tem, Qt))
3780 error ("Attempt to unintern t or nil"); */
3782 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3784 hash
= oblookup_last_bucket_number
;
3786 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
3788 if (XSYMBOL (tem
)->next
)
3789 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
3791 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
3795 Lisp_Object tail
, following
;
3797 for (tail
= XVECTOR (obarray
)->contents
[hash
];
3798 XSYMBOL (tail
)->next
;
3801 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
3802 if (EQ (following
, tem
))
3804 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
3813 /* Return the symbol in OBARRAY whose names matches the string
3814 of SIZE characters (SIZE_BYTE bytes) at PTR.
3815 If there is no such symbol in OBARRAY, return nil.
3817 Also store the bucket number in oblookup_last_bucket_number. */
3820 oblookup (Lisp_Object obarray
, register const char *ptr
, EMACS_INT size
, EMACS_INT size_byte
)
3824 register Lisp_Object tail
;
3825 Lisp_Object bucket
, tem
;
3827 if (!VECTORP (obarray
)
3828 || (obsize
= XVECTOR (obarray
)->size
) == 0)
3830 obarray
= check_obarray (obarray
);
3831 obsize
= XVECTOR (obarray
)->size
;
3833 /* This is sometimes needed in the middle of GC. */
3834 obsize
&= ~ARRAY_MARK_FLAG
;
3835 hash
= hash_string (ptr
, size_byte
) % obsize
;
3836 bucket
= XVECTOR (obarray
)->contents
[hash
];
3837 oblookup_last_bucket_number
= hash
;
3838 if (EQ (bucket
, make_number (0)))
3840 else if (!SYMBOLP (bucket
))
3841 error ("Bad data in guts of obarray"); /* Like CADR error message */
3843 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
3845 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
3846 && SCHARS (SYMBOL_NAME (tail
)) == size
3847 && !memcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
3849 else if (XSYMBOL (tail
)->next
== 0)
3852 XSETINT (tem
, hash
);
3857 hash_string (const char *ptr
, int len
)
3859 register const char *p
= ptr
;
3860 register const char *end
= p
+ len
;
3861 register unsigned char c
;
3862 register int hash
= 0;
3867 if (c
>= 0140) c
-= 40;
3868 hash
= ((hash
<<3) + (hash
>>28) + c
);
3870 return hash
& 07777777777;
3874 map_obarray (Lisp_Object obarray
, void (*fn
) (Lisp_Object
, Lisp_Object
), Lisp_Object arg
)
3877 register Lisp_Object tail
;
3878 CHECK_VECTOR (obarray
);
3879 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
3881 tail
= XVECTOR (obarray
)->contents
[i
];
3886 if (XSYMBOL (tail
)->next
== 0)
3888 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
3894 mapatoms_1 (Lisp_Object sym
, Lisp_Object function
)
3896 call1 (function
, sym
);
3899 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
3900 doc
: /* Call FUNCTION on every symbol in OBARRAY.
3901 OBARRAY defaults to the value of `obarray'. */)
3902 (Lisp_Object function
, Lisp_Object obarray
)
3904 if (NILP (obarray
)) obarray
= Vobarray
;
3905 obarray
= check_obarray (obarray
);
3907 map_obarray (obarray
, mapatoms_1
, function
);
3911 #define OBARRAY_SIZE 1511
3916 Lisp_Object oblength
;
3918 XSETFASTINT (oblength
, OBARRAY_SIZE
);
3920 Vobarray
= Fmake_vector (oblength
, make_number (0));
3921 initial_obarray
= Vobarray
;
3922 staticpro (&initial_obarray
);
3924 Qunbound
= Fmake_symbol (make_pure_c_string ("unbound"));
3925 /* Set temporary dummy values to Qnil and Vpurify_flag to satisfy the
3926 NILP (Vpurify_flag) check in intern_c_string. */
3927 Qnil
= make_number (-1); Vpurify_flag
= make_number (1);
3928 Qnil
= intern_c_string ("nil");
3930 /* Fmake_symbol inits fields of new symbols with Qunbound and Qnil,
3931 so those two need to be fixed manally. */
3932 SET_SYMBOL_VAL (XSYMBOL (Qunbound
), Qunbound
);
3933 XSYMBOL (Qunbound
)->function
= Qunbound
;
3934 XSYMBOL (Qunbound
)->plist
= Qnil
;
3935 /* XSYMBOL (Qnil)->function = Qunbound; */
3936 SET_SYMBOL_VAL (XSYMBOL (Qnil
), Qnil
);
3937 XSYMBOL (Qnil
)->constant
= 1;
3938 XSYMBOL (Qnil
)->plist
= Qnil
;
3940 Qt
= intern_c_string ("t");
3941 SET_SYMBOL_VAL (XSYMBOL (Qt
), Qt
);
3942 XSYMBOL (Qt
)->constant
= 1;
3944 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
3947 Qvariable_documentation
= intern_c_string ("variable-documentation");
3948 staticpro (&Qvariable_documentation
);
3950 read_buffer_size
= 100 + MAX_MULTIBYTE_LENGTH
;
3951 read_buffer
= (char *) xmalloc (read_buffer_size
);
3955 defsubr (struct Lisp_Subr
*sname
)
3958 sym
= intern_c_string (sname
->symbol_name
);
3959 XSETPVECTYPE (sname
, PVEC_SUBR
);
3960 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3963 #ifdef NOTDEF /* use fset in subr.el now */
3965 defalias (sname
, string
)
3966 struct Lisp_Subr
*sname
;
3970 sym
= intern (string
);
3971 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3975 /* Define an "integer variable"; a symbol whose value is forwarded to a
3976 C variable of type int. Sample call (munged w "xx" to fool make-docfile):
3977 DEFxxVAR_INT ("emacs-priority", &emacs_priority, "Documentation"); */
3979 defvar_int (struct Lisp_Intfwd
*i_fwd
,
3980 const char *namestring
, EMACS_INT
*address
)
3983 sym
= intern_c_string (namestring
);
3984 i_fwd
->type
= Lisp_Fwd_Int
;
3985 i_fwd
->intvar
= address
;
3986 XSYMBOL (sym
)->declared_special
= 1;
3987 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
3988 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)i_fwd
);
3991 /* Similar but define a variable whose value is t if address contains 1,
3992 nil if address contains 0. */
3994 defvar_bool (struct Lisp_Boolfwd
*b_fwd
,
3995 const char *namestring
, int *address
)
3998 sym
= intern_c_string (namestring
);
3999 b_fwd
->type
= Lisp_Fwd_Bool
;
4000 b_fwd
->boolvar
= address
;
4001 XSYMBOL (sym
)->declared_special
= 1;
4002 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4003 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)b_fwd
);
4004 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
4007 /* Similar but define a variable whose value is the Lisp Object stored
4008 at address. Two versions: with and without gc-marking of the C
4009 variable. The nopro version is used when that variable will be
4010 gc-marked for some other reason, since marking the same slot twice
4011 can cause trouble with strings. */
4013 defvar_lisp_nopro (struct Lisp_Objfwd
*o_fwd
,
4014 const char *namestring
, Lisp_Object
*address
)
4017 sym
= intern_c_string (namestring
);
4018 o_fwd
->type
= Lisp_Fwd_Obj
;
4019 o_fwd
->objvar
= address
;
4020 XSYMBOL (sym
)->declared_special
= 1;
4021 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4022 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)o_fwd
);
4026 defvar_lisp (struct Lisp_Objfwd
*o_fwd
,
4027 const char *namestring
, Lisp_Object
*address
)
4029 defvar_lisp_nopro (o_fwd
, namestring
, address
);
4030 staticpro (address
);
4034 /* Similar but define a variable whose value is the Lisp Object stored
4035 at a particular offset in the current kboard object. */
4038 defvar_kboard (struct Lisp_Kboard_Objfwd
*ko_fwd
,
4039 const char *namestring
, int offset
)
4042 sym
= intern_c_string (namestring
);
4043 ko_fwd
->type
= Lisp_Fwd_Kboard_Obj
;
4044 ko_fwd
->offset
= offset
;
4045 XSYMBOL (sym
)->declared_special
= 1;
4046 XSYMBOL (sym
)->redirect
= SYMBOL_FORWARDED
;
4047 SET_SYMBOL_FWD (XSYMBOL (sym
), (union Lisp_Fwd
*)ko_fwd
);
4050 /* Record the value of load-path used at the start of dumping
4051 so we can see if the site changed it later during dumping. */
4052 static Lisp_Object dump_path
;
4058 int turn_off_warning
= 0;
4060 /* Compute the default load-path. */
4062 normal
= PATH_LOADSEARCH
;
4063 Vload_path
= decode_env_path (0, normal
);
4065 if (NILP (Vpurify_flag
))
4066 normal
= PATH_LOADSEARCH
;
4068 normal
= PATH_DUMPLOADSEARCH
;
4070 /* In a dumped Emacs, we normally have to reset the value of
4071 Vload_path from PATH_LOADSEARCH, since the value that was dumped
4072 uses ../lisp, instead of the path of the installed elisp
4073 libraries. However, if it appears that Vload_path was changed
4074 from the default before dumping, don't override that value. */
4077 if (! NILP (Fequal (dump_path
, Vload_path
)))
4079 Vload_path
= decode_env_path (0, normal
);
4080 if (!NILP (Vinstallation_directory
))
4082 Lisp_Object tem
, tem1
, sitelisp
;
4084 /* Remove site-lisp dirs from path temporarily and store
4085 them in sitelisp, then conc them on at the end so
4086 they're always first in path. */
4090 tem
= Fcar (Vload_path
);
4091 tem1
= Fstring_match (build_string ("site-lisp"),
4095 Vload_path
= Fcdr (Vload_path
);
4096 sitelisp
= Fcons (tem
, sitelisp
);
4102 /* Add to the path the lisp subdir of the
4103 installation dir, if it exists. */
4104 tem
= Fexpand_file_name (build_string ("lisp"),
4105 Vinstallation_directory
);
4106 tem1
= Ffile_exists_p (tem
);
4109 if (NILP (Fmember (tem
, Vload_path
)))
4111 turn_off_warning
= 1;
4112 Vload_path
= Fcons (tem
, Vload_path
);
4116 /* That dir doesn't exist, so add the build-time
4117 Lisp dirs instead. */
4118 Vload_path
= nconc2 (Vload_path
, dump_path
);
4120 /* Add leim under the installation dir, if it exists. */
4121 tem
= Fexpand_file_name (build_string ("leim"),
4122 Vinstallation_directory
);
4123 tem1
= Ffile_exists_p (tem
);
4126 if (NILP (Fmember (tem
, Vload_path
)))
4127 Vload_path
= Fcons (tem
, Vload_path
);
4130 /* Add site-lisp under the installation dir, if it exists. */
4131 tem
= Fexpand_file_name (build_string ("site-lisp"),
4132 Vinstallation_directory
);
4133 tem1
= Ffile_exists_p (tem
);
4136 if (NILP (Fmember (tem
, Vload_path
)))
4137 Vload_path
= Fcons (tem
, Vload_path
);
4140 /* If Emacs was not built in the source directory,
4141 and it is run from where it was built, add to load-path
4142 the lisp, leim and site-lisp dirs under that directory. */
4144 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
4148 tem
= Fexpand_file_name (build_string ("src/Makefile"),
4149 Vinstallation_directory
);
4150 tem1
= Ffile_exists_p (tem
);
4152 /* Don't be fooled if they moved the entire source tree
4153 AFTER dumping Emacs. If the build directory is indeed
4154 different from the source dir, src/Makefile.in and
4155 src/Makefile will not be found together. */
4156 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
4157 Vinstallation_directory
);
4158 tem2
= Ffile_exists_p (tem
);
4159 if (!NILP (tem1
) && NILP (tem2
))
4161 tem
= Fexpand_file_name (build_string ("lisp"),
4164 if (NILP (Fmember (tem
, Vload_path
)))
4165 Vload_path
= Fcons (tem
, Vload_path
);
4167 tem
= Fexpand_file_name (build_string ("leim"),
4170 if (NILP (Fmember (tem
, Vload_path
)))
4171 Vload_path
= Fcons (tem
, Vload_path
);
4173 tem
= Fexpand_file_name (build_string ("site-lisp"),
4176 if (NILP (Fmember (tem
, Vload_path
)))
4177 Vload_path
= Fcons (tem
, Vload_path
);
4180 if (!NILP (sitelisp
) && !no_site_lisp
)
4181 Vload_path
= nconc2 (Fnreverse (sitelisp
), Vload_path
);
4187 /* NORMAL refers to the lisp dir in the source directory. */
4188 /* We used to add ../lisp at the front here, but
4189 that caused trouble because it was copied from dump_path
4190 into Vload_path, above, when Vinstallation_directory was non-nil.
4191 It should be unnecessary. */
4192 Vload_path
= decode_env_path (0, normal
);
4193 dump_path
= Vload_path
;
4197 #if (!(defined (WINDOWSNT) || (defined (HAVE_NS))))
4198 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
4199 almost never correct, thereby causing a warning to be printed out that
4200 confuses users. Since PATH_LOADSEARCH is always overridden by the
4201 EMACSLOADPATH environment variable below, disable the warning on NT. */
4203 /* Warn if dirs in the *standard* path don't exist. */
4204 if (!turn_off_warning
)
4206 Lisp_Object path_tail
;
4208 for (path_tail
= Vload_path
;
4210 path_tail
= XCDR (path_tail
))
4212 Lisp_Object dirfile
;
4213 dirfile
= Fcar (path_tail
);
4214 if (STRINGP (dirfile
))
4216 dirfile
= Fdirectory_file_name (dirfile
);
4217 if (access (SSDATA (dirfile
), 0) < 0)
4218 dir_warning ("Warning: Lisp directory `%s' does not exist.\n",
4223 #endif /* !(WINDOWSNT || HAVE_NS) */
4225 /* If the EMACSLOADPATH environment variable is set, use its value.
4226 This doesn't apply if we're dumping. */
4228 if (NILP (Vpurify_flag
)
4229 && egetenv ("EMACSLOADPATH"))
4231 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
4235 load_in_progress
= 0;
4236 Vload_file_name
= Qnil
;
4238 load_descriptor_list
= Qnil
;
4240 Vstandard_input
= Qt
;
4241 Vloads_in_progress
= Qnil
;
4244 /* Print a warning, using format string FORMAT, that directory DIRNAME
4245 does not exist. Print it on stderr and put it in *Messages*. */
4248 dir_warning (const char *format
, Lisp_Object dirname
)
4251 = (char *) alloca (SCHARS (dirname
) + strlen (format
) + 5);
4253 fprintf (stderr
, format
, SDATA (dirname
));
4254 sprintf (buffer
, format
, SDATA (dirname
));
4255 /* Don't log the warning before we've initialized!! */
4257 message_dolog (buffer
, strlen (buffer
), 0, STRING_MULTIBYTE (dirname
));
4261 syms_of_lread (void)
4264 defsubr (&Sread_from_string
);
4266 defsubr (&Sintern_soft
);
4267 defsubr (&Sunintern
);
4268 defsubr (&Sget_load_suffixes
);
4270 defsubr (&Seval_buffer
);
4271 defsubr (&Seval_region
);
4272 defsubr (&Sread_char
);
4273 defsubr (&Sread_char_exclusive
);
4274 defsubr (&Sread_event
);
4275 defsubr (&Sget_file_char
);
4276 defsubr (&Smapatoms
);
4277 defsubr (&Slocate_file_internal
);
4279 DEFVAR_LISP ("obarray", Vobarray
,
4280 doc
: /* Symbol table for use by `intern' and `read'.
4281 It is a vector whose length ought to be prime for best results.
4282 The vector's contents don't make sense if examined from Lisp programs;
4283 to find all the symbols in an obarray, use `mapatoms'. */);
4285 DEFVAR_LISP ("values", Vvalues
,
4286 doc
: /* List of values of all expressions which were read, evaluated and printed.
4287 Order is reverse chronological. */);
4289 DEFVAR_LISP ("standard-input", Vstandard_input
,
4290 doc
: /* Stream for read to get input from.
4291 See documentation of `read' for possible values. */);
4292 Vstandard_input
= Qt
;
4294 DEFVAR_LISP ("read-with-symbol-positions", Vread_with_symbol_positions
,
4295 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
4297 If this variable is a buffer, then only forms read from that buffer
4298 will be added to `read-symbol-positions-list'.
4299 If this variable is t, then all read forms will be added.
4300 The effect of all other values other than nil are not currently
4301 defined, although they may be in the future.
4303 The positions are relative to the last call to `read' or
4304 `read-from-string'. It is probably a bad idea to set this variable at
4305 the toplevel; bind it instead. */);
4306 Vread_with_symbol_positions
= Qnil
;
4308 DEFVAR_LISP ("read-symbol-positions-list", Vread_symbol_positions_list
,
4309 doc
: /* A list mapping read symbols to their positions.
4310 This variable is modified during calls to `read' or
4311 `read-from-string', but only when `read-with-symbol-positions' is
4314 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
4315 CHAR-POSITION is an integer giving the offset of that occurrence of the
4316 symbol from the position where `read' or `read-from-string' started.
4318 Note that a symbol will appear multiple times in this list, if it was
4319 read multiple times. The list is in the same order as the symbols
4321 Vread_symbol_positions_list
= Qnil
;
4323 DEFVAR_LISP ("read-circle", Vread_circle
,
4324 doc
: /* Non-nil means read recursive structures using #N= and #N# syntax. */);
4327 DEFVAR_LISP ("load-path", Vload_path
,
4328 doc
: /* *List of directories to search for files to load.
4329 Each element is a string (directory name) or nil (try default directory).
4330 Initialized based on EMACSLOADPATH environment variable, if any,
4331 otherwise to default specified by file `epaths.h' when Emacs was built. */);
4333 DEFVAR_LISP ("load-suffixes", Vload_suffixes
,
4334 doc
: /* List of suffixes for (compiled or source) Emacs Lisp files.
4335 This list should not include the empty string.
4336 `load' and related functions try to append these suffixes, in order,
4337 to the specified file name if a Lisp suffix is allowed or required. */);
4338 Vload_suffixes
= Fcons (make_pure_c_string (".elc"),
4339 Fcons (make_pure_c_string (".el"), Qnil
));
4340 DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes
,
4341 doc
: /* List of suffixes that indicate representations of \
4343 This list should normally start with the empty string.
4345 Enabling Auto Compression mode appends the suffixes in
4346 `jka-compr-load-suffixes' to this list and disabling Auto Compression
4347 mode removes them again. `load' and related functions use this list to
4348 determine whether they should look for compressed versions of a file
4349 and, if so, which suffixes they should try to append to the file name
4350 in order to do so. However, if you want to customize which suffixes
4351 the loading functions recognize as compression suffixes, you should
4352 customize `jka-compr-load-suffixes' rather than the present variable. */);
4353 Vload_file_rep_suffixes
= Fcons (empty_unibyte_string
, Qnil
);
4355 DEFVAR_BOOL ("load-in-progress", load_in_progress
,
4356 doc
: /* Non-nil if inside of `load'. */);
4357 Qload_in_progress
= intern_c_string ("load-in-progress");
4358 staticpro (&Qload_in_progress
);
4360 DEFVAR_LISP ("after-load-alist", Vafter_load_alist
,
4361 doc
: /* An alist of expressions to be evalled when particular files are loaded.
4362 Each element looks like (REGEXP-OR-FEATURE FORMS...).
4364 REGEXP-OR-FEATURE is either a regular expression to match file names, or
4365 a symbol \(a feature name).
4367 When `load' is run and the file-name argument matches an element's
4368 REGEXP-OR-FEATURE, or when `provide' is run and provides the symbol
4369 REGEXP-OR-FEATURE, the FORMS in the element are executed.
4371 An error in FORMS does not undo the load, but does prevent execution of
4372 the rest of the FORMS. */);
4373 Vafter_load_alist
= Qnil
;
4375 DEFVAR_LISP ("load-history", Vload_history
,
4376 doc
: /* Alist mapping loaded file names to symbols and features.
4377 Each alist element should be a list (FILE-NAME ENTRIES...), where
4378 FILE-NAME is the name of a file that has been loaded into Emacs.
4379 The file name is absolute and true (i.e. it doesn't contain symlinks).
4380 As an exception, one of the alist elements may have FILE-NAME nil,
4381 for symbols and features not associated with any file.
4383 The remaining ENTRIES in the alist element describe the functions and
4384 variables defined in that file, the features provided, and the
4385 features required. Each entry has the form `(provide . FEATURE)',
4386 `(require . FEATURE)', `(defun . FUNCTION)', `(autoload . SYMBOL)',
4387 `(defface . SYMBOL)', or `(t . SYMBOL)'. In addition, an entry `(t
4388 . SYMBOL)' may precede an entry `(defun . FUNCTION)', and means that
4389 SYMBOL was an autoload before this file redefined it as a function.
4391 During preloading, the file name recorded is relative to the main Lisp
4392 directory. These file names are converted to absolute at startup. */);
4393 Vload_history
= Qnil
;
4395 DEFVAR_LISP ("load-file-name", Vload_file_name
,
4396 doc
: /* Full name of file being loaded by `load'. */);
4397 Vload_file_name
= Qnil
;
4399 DEFVAR_LISP ("user-init-file", Vuser_init_file
,
4400 doc
: /* File name, including directory, of user's initialization file.
4401 If the file loaded had extension `.elc', and the corresponding source file
4402 exists, this variable contains the name of source file, suitable for use
4403 by functions like `custom-save-all' which edit the init file.
4404 While Emacs loads and evaluates the init file, value is the real name
4405 of the file, regardless of whether or not it has the `.elc' extension. */);
4406 Vuser_init_file
= Qnil
;
4408 DEFVAR_LISP ("current-load-list", Vcurrent_load_list
,
4409 doc
: /* Used for internal purposes by `load'. */);
4410 Vcurrent_load_list
= Qnil
;
4412 DEFVAR_LISP ("load-read-function", Vload_read_function
,
4413 doc
: /* Function used by `load' and `eval-region' for reading expressions.
4414 The default is nil, which means use the function `read'. */);
4415 Vload_read_function
= Qnil
;
4417 DEFVAR_LISP ("load-source-file-function", Vload_source_file_function
,
4418 doc
: /* Function called in `load' for loading an Emacs Lisp source file.
4419 This function is for doing code conversion before reading the source file.
4420 If nil, loading is done without any code conversion.
4421 Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where
4422 FULLNAME is the full name of FILE.
4423 See `load' for the meaning of the remaining arguments. */);
4424 Vload_source_file_function
= Qnil
;
4426 DEFVAR_BOOL ("load-force-doc-strings", load_force_doc_strings
,
4427 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
4428 This is useful when the file being loaded is a temporary copy. */);
4429 load_force_doc_strings
= 0;
4431 DEFVAR_BOOL ("load-convert-to-unibyte", load_convert_to_unibyte
,
4432 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
4433 This is normally bound by `load' and `eval-buffer' to control `read',
4434 and is not meant for users to change. */);
4435 load_convert_to_unibyte
= 0;
4437 DEFVAR_LISP ("source-directory", Vsource_directory
,
4438 doc
: /* Directory in which Emacs sources were found when Emacs was built.
4439 You cannot count on them to still be there! */);
4441 = Fexpand_file_name (build_string ("../"),
4442 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
4444 DEFVAR_LISP ("preloaded-file-list", Vpreloaded_file_list
,
4445 doc
: /* List of files that were preloaded (when dumping Emacs). */);
4446 Vpreloaded_file_list
= Qnil
;
4448 DEFVAR_LISP ("byte-boolean-vars", Vbyte_boolean_vars
,
4449 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
4450 Vbyte_boolean_vars
= Qnil
;
4452 DEFVAR_BOOL ("load-dangerous-libraries", load_dangerous_libraries
,
4453 doc
: /* Non-nil means load dangerous compiled Lisp files.
4454 Some versions of XEmacs use different byte codes than Emacs. These
4455 incompatible byte codes can make Emacs crash when it tries to execute
4457 load_dangerous_libraries
= 0;
4459 DEFVAR_BOOL ("force-load-messages", force_load_messages
,
4460 doc
: /* Non-nil means force printing messages when loading Lisp files.
4461 This overrides the value of the NOMESSAGE argument to `load'. */);
4462 force_load_messages
= 0;
4464 DEFVAR_LISP ("bytecomp-version-regexp", Vbytecomp_version_regexp
,
4465 doc
: /* Regular expression matching safe to load compiled Lisp files.
4466 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
4467 from the file, and matches them against this regular expression.
4468 When the regular expression matches, the file is considered to be safe
4469 to load. See also `load-dangerous-libraries'. */);
4470 Vbytecomp_version_regexp
4471 = make_pure_c_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
4473 Qlexical_binding
= intern ("lexical-binding");
4474 staticpro (&Qlexical_binding
);
4475 DEFVAR_LISP ("lexical-binding", Vlexical_binding
,
4476 doc
: /* If non-nil, use lexical binding when evaluating code.
4477 This only applies to code evaluated by `eval-buffer' and `eval-region'.
4478 This variable is automatically set from the file variables of an interpreted
4479 lisp file read using `load'. */);
4480 Fmake_variable_buffer_local (Qlexical_binding
);
4482 DEFVAR_LISP ("eval-buffer-list", Veval_buffer_list
,
4483 doc
: /* List of buffers being read from by calls to `eval-buffer' and `eval-region'. */);
4484 Veval_buffer_list
= Qnil
;
4486 DEFVAR_LISP ("old-style-backquotes", Vold_style_backquotes
,
4487 doc
: /* Set to non-nil when `read' encounters an old-style backquote. */);
4488 Vold_style_backquotes
= Qnil
;
4489 Qold_style_backquotes
= intern_c_string ("old-style-backquotes");
4490 staticpro (&Qold_style_backquotes
);
4492 /* Vsource_directory was initialized in init_lread. */
4494 load_descriptor_list
= Qnil
;
4495 staticpro (&load_descriptor_list
);
4497 Qcurrent_load_list
= intern_c_string ("current-load-list");
4498 staticpro (&Qcurrent_load_list
);
4500 Qstandard_input
= intern_c_string ("standard-input");
4501 staticpro (&Qstandard_input
);
4503 Qread_char
= intern_c_string ("read-char");
4504 staticpro (&Qread_char
);
4506 Qget_file_char
= intern_c_string ("get-file-char");
4507 staticpro (&Qget_file_char
);
4509 Qget_emacs_mule_file_char
= intern_c_string ("get-emacs-mule-file-char");
4510 staticpro (&Qget_emacs_mule_file_char
);
4512 Qload_force_doc_strings
= intern_c_string ("load-force-doc-strings");
4513 staticpro (&Qload_force_doc_strings
);
4515 Qbackquote
= intern_c_string ("`");
4516 staticpro (&Qbackquote
);
4517 Qcomma
= intern_c_string (",");
4518 staticpro (&Qcomma
);
4519 Qcomma_at
= intern_c_string (",@");
4520 staticpro (&Qcomma_at
);
4521 Qcomma_dot
= intern_c_string (",.");
4522 staticpro (&Qcomma_dot
);
4524 Qinhibit_file_name_operation
= intern_c_string ("inhibit-file-name-operation");
4525 staticpro (&Qinhibit_file_name_operation
);
4527 Qascii_character
= intern_c_string ("ascii-character");
4528 staticpro (&Qascii_character
);
4530 Qfunction
= intern_c_string ("function");
4531 staticpro (&Qfunction
);
4533 Qload
= intern_c_string ("load");
4536 Qload_file_name
= intern_c_string ("load-file-name");
4537 staticpro (&Qload_file_name
);
4539 Qeval_buffer_list
= intern_c_string ("eval-buffer-list");
4540 staticpro (&Qeval_buffer_list
);
4542 Qfile_truename
= intern_c_string ("file-truename");
4543 staticpro (&Qfile_truename
) ;
4545 Qdo_after_load_evaluation
= intern_c_string ("do-after-load-evaluation");
4546 staticpro (&Qdo_after_load_evaluation
) ;
4548 staticpro (&dump_path
);
4550 staticpro (&read_objects
);
4551 read_objects
= Qnil
;
4552 staticpro (&seen_list
);
4555 Vloads_in_progress
= Qnil
;
4556 staticpro (&Vloads_in_progress
);
4558 Qhash_table
= intern_c_string ("hash-table");
4559 staticpro (&Qhash_table
);
4560 Qdata
= intern_c_string ("data");
4562 Qtest
= intern_c_string ("test");
4564 Qsize
= intern_c_string ("size");
4566 Qweakness
= intern_c_string ("weakness");
4567 staticpro (&Qweakness
);
4568 Qrehash_size
= intern_c_string ("rehash-size");
4569 staticpro (&Qrehash_size
);
4570 Qrehash_threshold
= intern_c_string ("rehash-threshold");
4571 staticpro (&Qrehash_threshold
);