1 /* Lisp parsing and input streams.
2 Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99, 2000, 2001
3 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 2, or (at your option)
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; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include <sys/types.h>
30 #include "intervals.h"
36 #include "termhooks.h"
40 #include <sys/inode.h>
45 #include <unistd.h> /* to get X_OK */
62 #endif /* HAVE_SETLOCALE */
69 #define file_offset off_t
70 #define file_tell ftello
72 #define file_offset long
73 #define file_tell ftell
80 Lisp_Object Qread_char
, Qget_file_char
, Qstandard_input
, Qcurrent_load_list
;
81 Lisp_Object Qvariable_documentation
, Vvalues
, Vstandard_input
, Vafter_load_alist
;
82 Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
83 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
84 Lisp_Object Qinhibit_file_name_operation
;
86 extern Lisp_Object Qevent_symbol_element_mask
;
87 extern Lisp_Object Qfile_exists_p
;
89 /* non-zero if inside `load' */
92 /* Directory in which the sources were found. */
93 Lisp_Object Vsource_directory
;
95 /* Search path and suffixes for files to be loaded. */
96 Lisp_Object Vload_path
, Vload_suffixes
, default_suffixes
;
98 /* File name of user's init file. */
99 Lisp_Object Vuser_init_file
;
101 /* This is the user-visible association list that maps features to
102 lists of defs in their load files. */
103 Lisp_Object Vload_history
;
105 /* This is used to build the load history. */
106 Lisp_Object Vcurrent_load_list
;
108 /* List of files that were preloaded. */
109 Lisp_Object Vpreloaded_file_list
;
111 /* Name of file actually being read by `load'. */
112 Lisp_Object Vload_file_name
;
114 /* Function to use for reading, in `load' and friends. */
115 Lisp_Object Vload_read_function
;
117 /* The association list of objects read with the #n=object form.
118 Each member of the list has the form (n . object), and is used to
119 look up the object for the corresponding #n# construct.
120 It must be set to nil before all top-level calls to read0. */
121 Lisp_Object read_objects
;
123 /* Nonzero means load should forcibly load all dynamic doc strings. */
124 static int load_force_doc_strings
;
126 /* Nonzero means read should convert strings to unibyte. */
127 static int load_convert_to_unibyte
;
129 /* Function to use for loading an Emacs lisp source file (not
130 compiled) instead of readevalloop. */
131 Lisp_Object Vload_source_file_function
;
133 /* List of all DEFVAR_BOOL variables. Used by the byte optimizer. */
134 Lisp_Object Vbyte_boolean_vars
;
136 /* Whether or not to add a `read-positions' property to symbols
138 Lisp_Object Vread_with_symbol_positions
;
140 /* List of (SYMBOL . POSITION) accumulated so far. */
141 Lisp_Object Vread_symbol_positions_list
;
143 /* List of descriptors now open for Fload. */
144 static Lisp_Object load_descriptor_list
;
146 /* File for get_file_char to read from. Use by load. */
147 static FILE *instream
;
149 /* When nonzero, read conses in pure space */
150 static int read_pure
;
152 /* For use within read-from-string (this reader is non-reentrant!!) */
153 static int read_from_string_index
;
154 static int read_from_string_index_byte
;
155 static int read_from_string_limit
;
157 /* Number of bytes left to read in the buffer character
158 that `readchar' has already advanced over. */
159 static int readchar_backlog
;
160 /* Number of characters read in the current call to Fread or
161 Fread_from_string. */
162 static int readchar_count
;
164 /* This contains the last string skipped with #@. */
165 static char *saved_doc_string
;
166 /* Length of buffer allocated in saved_doc_string. */
167 static int saved_doc_string_size
;
168 /* Length of actual data in saved_doc_string. */
169 static int saved_doc_string_length
;
170 /* This is the file position that string came from. */
171 static file_offset saved_doc_string_position
;
173 /* This contains the previous string skipped with #@.
174 We copy it from saved_doc_string when a new string
175 is put in saved_doc_string. */
176 static char *prev_saved_doc_string
;
177 /* Length of buffer allocated in prev_saved_doc_string. */
178 static int prev_saved_doc_string_size
;
179 /* Length of actual data in prev_saved_doc_string. */
180 static int prev_saved_doc_string_length
;
181 /* This is the file position that string came from. */
182 static file_offset prev_saved_doc_string_position
;
184 /* Nonzero means inside a new-style backquote
185 with no surrounding parentheses.
186 Fread initializes this to zero, so we need not specbind it
187 or worry about what happens to it when there is an error. */
188 static int new_backquote_flag
;
190 /* A list of file names for files being loaded in Fload. Used to
191 check for recursive loads. */
193 static Lisp_Object Vloads_in_progress
;
195 /* Non-zero means load dangerous compiled Lisp files. */
197 int load_dangerous_libraries
;
199 /* A regular expression used to detect files compiled with Emacs. */
201 static Lisp_Object Vbytecomp_version_regexp
;
203 static void to_multibyte
P_ ((char **, char **, int *));
204 static void readevalloop
P_ ((Lisp_Object
, FILE*, Lisp_Object
,
205 Lisp_Object (*) (), int,
206 Lisp_Object
, Lisp_Object
));
207 static Lisp_Object load_unwind
P_ ((Lisp_Object
));
208 static Lisp_Object load_descriptor_unwind
P_ ((Lisp_Object
));
211 /* Handle unreading and rereading of characters.
212 Write READCHAR to read a character,
213 UNREAD(c) to unread c to be read again.
215 The READCHAR and UNREAD macros are meant for reading/unreading a
216 byte code; they do not handle multibyte characters. The caller
217 should manage them if necessary.
219 [ Actually that seems to be a lie; READCHAR will definitely read
220 multibyte characters from buffer sources, at least. Is the
221 comment just out of date?
222 -- Colin Walters <walters@gnu.org>, 22 May 2002 16:36:50 -0400 ]
225 #define READCHAR readchar (readcharfun)
226 #define UNREAD(c) unreadchar (readcharfun, c)
229 readchar (readcharfun
)
230 Lisp_Object readcharfun
;
237 if (BUFFERP (readcharfun
))
239 register struct buffer
*inbuffer
= XBUFFER (readcharfun
);
241 int pt_byte
= BUF_PT_BYTE (inbuffer
);
242 int orig_pt_byte
= pt_byte
;
244 if (readchar_backlog
> 0)
245 /* We get the address of the byte just passed,
246 which is the last byte of the character.
247 The other bytes in this character are consecutive with it,
248 because the gap can't be in the middle of a character. */
249 return *(BUF_BYTE_ADDRESS (inbuffer
, BUF_PT_BYTE (inbuffer
) - 1)
250 - --readchar_backlog
);
252 if (pt_byte
>= BUF_ZV_BYTE (inbuffer
))
255 readchar_backlog
= -1;
257 if (! NILP (inbuffer
->enable_multibyte_characters
))
259 /* Fetch the character code from the buffer. */
260 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, pt_byte
);
261 BUF_INC_POS (inbuffer
, pt_byte
);
262 c
= STRING_CHAR (p
, pt_byte
- orig_pt_byte
);
266 c
= BUF_FETCH_BYTE (inbuffer
, pt_byte
);
269 SET_BUF_PT_BOTH (inbuffer
, BUF_PT (inbuffer
) + 1, pt_byte
);
273 if (MARKERP (readcharfun
))
275 register struct buffer
*inbuffer
= XMARKER (readcharfun
)->buffer
;
277 int bytepos
= marker_byte_position (readcharfun
);
278 int orig_bytepos
= bytepos
;
280 if (readchar_backlog
> 0)
281 /* We get the address of the byte just passed,
282 which is the last byte of the character.
283 The other bytes in this character are consecutive with it,
284 because the gap can't be in the middle of a character. */
285 return *(BUF_BYTE_ADDRESS (inbuffer
, XMARKER (readcharfun
)->bytepos
- 1)
286 - --readchar_backlog
);
288 if (bytepos
>= BUF_ZV_BYTE (inbuffer
))
291 readchar_backlog
= -1;
293 if (! NILP (inbuffer
->enable_multibyte_characters
))
295 /* Fetch the character code from the buffer. */
296 unsigned char *p
= BUF_BYTE_ADDRESS (inbuffer
, bytepos
);
297 BUF_INC_POS (inbuffer
, bytepos
);
298 c
= STRING_CHAR (p
, bytepos
- orig_bytepos
);
302 c
= BUF_FETCH_BYTE (inbuffer
, bytepos
);
306 XMARKER (readcharfun
)->bytepos
= bytepos
;
307 XMARKER (readcharfun
)->charpos
++;
312 if (EQ (readcharfun
, Qlambda
))
313 return read_bytecode_char (0);
315 if (EQ (readcharfun
, Qget_file_char
))
319 /* Interrupted reads have been observed while reading over the network */
320 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
329 if (STRINGP (readcharfun
))
331 if (read_from_string_index
>= read_from_string_limit
)
334 FETCH_STRING_CHAR_ADVANCE (c
, readcharfun
,
335 read_from_string_index
,
336 read_from_string_index_byte
);
341 tem
= call0 (readcharfun
);
348 /* Unread the character C in the way appropriate for the stream READCHARFUN.
349 If the stream is a user function, call it with the char as argument. */
352 unreadchar (readcharfun
, c
)
353 Lisp_Object readcharfun
;
358 /* Don't back up the pointer if we're unreading the end-of-input mark,
359 since readchar didn't advance it when we read it. */
361 else if (BUFFERP (readcharfun
))
363 struct buffer
*b
= XBUFFER (readcharfun
);
364 int bytepos
= BUF_PT_BYTE (b
);
366 if (readchar_backlog
>= 0)
371 if (! NILP (b
->enable_multibyte_characters
))
372 BUF_DEC_POS (b
, bytepos
);
376 BUF_PT_BYTE (b
) = bytepos
;
379 else if (MARKERP (readcharfun
))
381 struct buffer
*b
= XMARKER (readcharfun
)->buffer
;
382 int bytepos
= XMARKER (readcharfun
)->bytepos
;
384 if (readchar_backlog
>= 0)
388 XMARKER (readcharfun
)->charpos
--;
389 if (! NILP (b
->enable_multibyte_characters
))
390 BUF_DEC_POS (b
, bytepos
);
394 XMARKER (readcharfun
)->bytepos
= bytepos
;
397 else if (STRINGP (readcharfun
))
399 read_from_string_index
--;
400 read_from_string_index_byte
401 = string_char_to_byte (readcharfun
, read_from_string_index
);
403 else if (EQ (readcharfun
, Qlambda
))
404 read_bytecode_char (1);
405 else if (EQ (readcharfun
, Qget_file_char
))
406 ungetc (c
, instream
);
408 call1 (readcharfun
, make_number (c
));
411 static Lisp_Object read_internal_start
P_ ((Lisp_Object
, Lisp_Object
,
413 static Lisp_Object read0
P_ ((Lisp_Object
));
414 static Lisp_Object read1
P_ ((Lisp_Object
, int *, int));
416 static Lisp_Object read_list
P_ ((int, Lisp_Object
));
417 static Lisp_Object read_vector
P_ ((Lisp_Object
, int));
418 static int read_multibyte
P_ ((int, Lisp_Object
));
420 static Lisp_Object substitute_object_recurse
P_ ((Lisp_Object
, Lisp_Object
,
422 static void substitute_object_in_subtree
P_ ((Lisp_Object
,
424 static void substitute_in_interval
P_ ((INTERVAL
, Lisp_Object
));
427 /* Get a character from the tty. */
429 extern Lisp_Object
read_char ();
431 /* Read input events until we get one that's acceptable for our purposes.
433 If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed
434 until we get a character we like, and then stuffed into
437 If ASCII_REQUIRED is non-zero, we check function key events to see
438 if the unmodified version of the symbol has a Qascii_character
439 property, and use that character, if present.
441 If ERROR_NONASCII is non-zero, we signal an error if the input we
442 get isn't an ASCII character with modifiers. If it's zero but
443 ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII
446 If INPUT_METHOD is nonzero, we invoke the current input method
447 if the character warrants that. */
450 read_filtered_event (no_switch_frame
, ascii_required
, error_nonascii
,
452 int no_switch_frame
, ascii_required
, error_nonascii
, input_method
;
454 register Lisp_Object val
, delayed_switch_frame
;
456 #ifdef HAVE_WINDOW_SYSTEM
457 if (display_hourglass_p
)
461 delayed_switch_frame
= Qnil
;
463 /* Read until we get an acceptable event. */
465 val
= read_char (0, 0, 0,
466 (input_method
? Qnil
: Qt
),
472 /* switch-frame events are put off until after the next ASCII
473 character. This is better than signaling an error just because
474 the last characters were typed to a separate minibuffer frame,
475 for example. Eventually, some code which can deal with
476 switch-frame events will read it and process it. */
478 && EVENT_HAS_PARAMETERS (val
)
479 && EQ (EVENT_HEAD (val
), Qswitch_frame
))
481 delayed_switch_frame
= val
;
487 /* Convert certain symbols to their ASCII equivalents. */
490 Lisp_Object tem
, tem1
;
491 tem
= Fget (val
, Qevent_symbol_element_mask
);
494 tem1
= Fget (Fcar (tem
), Qascii_character
);
495 /* Merge this symbol's modifier bits
496 with the ASCII equivalent of its basic code. */
498 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
502 /* If we don't have a character now, deal with it appropriately. */
507 Vunread_command_events
= Fcons (val
, Qnil
);
508 error ("Non-character input-event");
515 if (! NILP (delayed_switch_frame
))
516 unread_switch_frame
= delayed_switch_frame
;
520 #ifdef HAVE_WINDOW_SYSTEM
521 if (display_hourglass_p
)
530 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 2, 0,
531 doc
: /* Read a character from the command input (keyboard or macro).
532 It is returned as a number.
533 If the user generates an event which is not a character (i.e. a mouse
534 click or function key event), `read-char' signals an error. As an
535 exception, switch-frame events are put off until non-ASCII events can
537 If you want to read non-character events, or ignore them, call
538 `read-event' or `read-char-exclusive' instead.
540 If the optional argument PROMPT is non-nil, display that as a prompt.
541 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
542 input method is turned on in the current buffer, that input method
543 is used for reading a character. */)
544 (prompt
, inherit_input_method
)
545 Lisp_Object prompt
, inherit_input_method
;
548 message_with_string ("%s", prompt
, 0);
549 return read_filtered_event (1, 1, 1, ! NILP (inherit_input_method
));
552 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 2, 0,
553 doc
: /* Read an event object from the input stream.
554 If the optional argument PROMPT is non-nil, display that as a prompt.
555 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
556 input method is turned on in the current buffer, that input method
557 is used for reading a character. */)
558 (prompt
, inherit_input_method
)
559 Lisp_Object prompt
, inherit_input_method
;
562 message_with_string ("%s", prompt
, 0);
563 return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method
));
566 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 2, 0,
567 doc
: /* Read a character from the command input (keyboard or macro).
568 It is returned as a number. Non-character events are ignored.
570 If the optional argument PROMPT is non-nil, display that as a prompt.
571 If the optional argument INHERIT-INPUT-METHOD is non-nil and some
572 input method is turned on in the current buffer, that input method
573 is used for reading a character. */)
574 (prompt
, inherit_input_method
)
575 Lisp_Object prompt
, inherit_input_method
;
578 message_with_string ("%s", prompt
, 0);
579 return read_filtered_event (1, 1, 0, ! NILP (inherit_input_method
));
582 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
583 doc
: /* Don't use this yourself. */)
586 register Lisp_Object val
;
587 XSETINT (val
, getc (instream
));
593 /* Value is non-zero if the file asswociated with file descriptor FD
594 is a compiled Lisp file that's safe to load. Only files compiled
595 with Emacs are safe to load. Files compiled with XEmacs can lead
596 to a crash in Fbyte_code because of an incompatible change in the
607 /* Read the first few bytes from the file, and look for a line
608 specifying the byte compiler version used. */
609 nbytes
= emacs_read (fd
, buf
, sizeof buf
- 1);
614 /* Skip to the next newline, skipping over the initial `ELC'
615 with NUL bytes following it. */
616 for (i
= 0; i
< nbytes
&& buf
[i
] != '\n'; ++i
)
620 && fast_c_string_match_ignore_case (Vbytecomp_version_regexp
,
625 lseek (fd
, 0, SEEK_SET
);
630 /* Callback for record_unwind_protect. Restore the old load list OLD,
631 after loading a file successfully. */
634 record_load_unwind (old
)
637 return Vloads_in_progress
= old
;
640 /* This handler function is used via internal_condition_case_1. */
643 load_error_handler (data
)
649 DEFUN ("load", Fload
, Sload
, 1, 5, 0,
650 doc
: /* Execute a file of Lisp code named FILE.
651 First try FILE with `.elc' appended, then try with `.el',
652 then try FILE unmodified (the exact suffixes are determined by
653 `load-suffixes'). Environment variable references in FILE
654 are replaced with their values by calling `substitute-in-file-name'.
655 This function searches the directories in `load-path'.
656 If optional second arg NOERROR is non-nil,
657 report no error if FILE doesn't exist.
658 Print messages at start and end of loading unless
659 optional third arg NOMESSAGE is non-nil.
660 If optional fourth arg NOSUFFIX is non-nil, don't try adding
661 suffixes `.elc' or `.el' to the specified name FILE.
662 If optional fifth arg MUST-SUFFIX is non-nil, insist on
663 the suffix `.elc' or `.el'; don't accept just FILE unless
664 it ends in one of those suffixes or includes a directory name.
665 Return t if file exists. */)
666 (file
, noerror
, nomessage
, nosuffix
, must_suffix
)
667 Lisp_Object file
, noerror
, nomessage
, nosuffix
, must_suffix
;
669 register FILE *stream
;
670 register int fd
= -1;
671 register Lisp_Object lispstream
;
672 int count
= SPECPDL_INDEX ();
675 Lisp_Object found
, efound
;
676 /* 1 means we printed the ".el is newer" message. */
678 /* 1 means we are loading a compiled file. */
689 /* If file name is magic, call the handler. */
690 /* This shouldn't be necessary any more now that `openp' handles it right.
691 handler = Ffind_file_name_handler (file, Qload);
693 return call5 (handler, Qload, file, noerror, nomessage, nosuffix); */
695 /* Do this after the handler to avoid
696 the need to gcpro noerror, nomessage and nosuffix.
697 (Below here, we care only whether they are nil or not.)
698 The presence of this call is the result of a historical accident:
699 it used to be in every file-operations and when it got removed
700 everywhere, it accidentally stayed here. Since then, enough people
701 supposedly have things like (load "$PROJECT/foo.el") in their .emacs
702 that it seemed risky to remove. */
703 if (! NILP (noerror
))
705 file
= internal_condition_case_1 (Fsubstitute_in_file_name
, file
,
706 Qt
, load_error_handler
);
711 file
= Fsubstitute_in_file_name (file
);
714 /* Avoid weird lossage with null string as arg,
715 since it would try to load a directory as a Lisp file */
716 if (SCHARS (file
) > 0)
718 int size
= SBYTES (file
);
723 if (! NILP (must_suffix
))
725 /* Don't insist on adding a suffix if FILE already ends with one. */
727 && !strcmp (SDATA (file
) + size
- 3, ".el"))
730 && !strcmp (SDATA (file
) + size
- 4, ".elc"))
732 /* Don't insist on adding a suffix
733 if the argument includes a directory name. */
734 else if (! NILP (Ffile_name_directory (file
)))
738 fd
= openp (Vload_path
, file
,
739 (!NILP (nosuffix
) ? Qnil
740 : !NILP (must_suffix
) ? Vload_suffixes
741 : Fappend (2, (tmp
[0] = Vload_suffixes
,
742 tmp
[1] = default_suffixes
,
751 Fsignal (Qfile_error
, Fcons (build_string ("Cannot open load file"),
752 Fcons (file
, Qnil
)));
757 /* Tell startup.el whether or not we found the user's init file. */
758 if (EQ (Qt
, Vuser_init_file
))
759 Vuser_init_file
= found
;
761 /* If FD is -2, that means openp found a magic file. */
764 if (NILP (Fequal (found
, file
)))
765 /* If FOUND is a different file name from FILE,
766 find its handler even if we have already inhibited
767 the `load' operation on FILE. */
768 handler
= Ffind_file_name_handler (found
, Qt
);
770 handler
= Ffind_file_name_handler (found
, Qload
);
771 if (! NILP (handler
))
772 return call5 (handler
, Qload
, found
, noerror
, nomessage
, Qt
);
775 /* Check if we're stuck in a recursive load cycle.
777 2000-09-21: It's not possible to just check for the file loaded
778 being a member of Vloads_in_progress. This fails because of the
779 way the byte compiler currently works; `provide's are not
780 evaluted, see font-lock.el/jit-lock.el as an example. This
781 leads to a certain amount of ``normal'' recursion.
783 Also, just loading a file recursively is not always an error in
784 the general case; the second load may do something different. */
788 for (tem
= Vloads_in_progress
; CONSP (tem
); tem
= XCDR (tem
))
789 if (!NILP (Fequal (found
, XCAR (tem
))))
792 Fsignal (Qerror
, Fcons (build_string ("Recursive load"),
793 Fcons (found
, Vloads_in_progress
)));
794 record_unwind_protect (record_load_unwind
, Vloads_in_progress
);
795 Vloads_in_progress
= Fcons (found
, Vloads_in_progress
);
798 if (!bcmp (SDATA (found
) + SBYTES (found
) - 4,
800 /* Load .elc files directly, but not when they are
801 remote and have no handler! */
808 if (!safe_to_load_p (fd
))
811 if (!load_dangerous_libraries
)
815 error ("File `%s' was not compiled in Emacs",
818 else if (!NILP (nomessage
))
819 message_with_string ("File `%s' not compiled in Emacs", found
, 1);
825 efound
= ENCODE_FILE (found
);
830 stat ((char *)SDATA (efound
), &s1
);
831 SSET (efound
, SBYTES (efound
) - 1, 0);
832 result
= stat ((char *)SDATA (efound
), &s2
);
833 SSET (efound
, SBYTES (efound
) - 1, 'c');
836 if (result
>= 0 && (unsigned) s1
.st_mtime
< (unsigned) s2
.st_mtime
)
838 /* Make the progress messages mention that source is newer. */
841 /* If we won't print another message, mention this anyway. */
842 if (!NILP (nomessage
))
845 file
= Fsubstring (found
, make_number (0), make_number (-1));
846 message_with_string ("Source file `%s' newer than byte-compiled file",
847 file
, STRING_MULTIBYTE (file
));
854 /* We are loading a source file (*.el). */
855 if (!NILP (Vload_source_file_function
))
861 val
= call4 (Vload_source_file_function
, found
, file
,
862 NILP (noerror
) ? Qnil
: Qt
,
863 NILP (nomessage
) ? Qnil
: Qt
);
864 return unbind_to (count
, val
);
871 efound
= ENCODE_FILE (found
);
872 stream
= fopen ((char *) SDATA (efound
), fmode
);
874 #else /* not WINDOWSNT */
875 stream
= fdopen (fd
, fmode
);
876 #endif /* not WINDOWSNT */
880 error ("Failure to create stdio stream for %s", SDATA (file
));
883 if (! NILP (Vpurify_flag
))
884 Vpreloaded_file_list
= Fcons (file
, Vpreloaded_file_list
);
886 if (NILP (nomessage
))
889 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...",
892 message_with_string ("Loading %s (source)...", file
, 1);
894 message_with_string ("Loading %s (compiled; note, source file is newer)...",
896 else /* The typical case; compiled file newer than source file. */
897 message_with_string ("Loading %s...", file
, 1);
901 lispstream
= Fcons (Qnil
, Qnil
);
902 XSETCARFASTINT (lispstream
, (EMACS_UINT
)stream
>> 16);
903 XSETCDRFASTINT (lispstream
, (EMACS_UINT
)stream
& 0xffff);
904 record_unwind_protect (load_unwind
, lispstream
);
905 record_unwind_protect (load_descriptor_unwind
, load_descriptor_list
);
906 specbind (Qload_file_name
, found
);
907 specbind (Qinhibit_file_name_operation
, Qnil
);
909 = Fcons (make_number (fileno (stream
)), load_descriptor_list
);
911 readevalloop (Qget_file_char
, stream
, file
, Feval
, 0, Qnil
, Qnil
);
912 unbind_to (count
, Qnil
);
914 /* Run any load-hooks for this file. */
915 temp
= Fassoc (file
, Vafter_load_alist
);
917 Fprogn (Fcdr (temp
));
920 if (saved_doc_string
)
921 free (saved_doc_string
);
922 saved_doc_string
= 0;
923 saved_doc_string_size
= 0;
925 if (prev_saved_doc_string
)
926 xfree (prev_saved_doc_string
);
927 prev_saved_doc_string
= 0;
928 prev_saved_doc_string_size
= 0;
930 if (!noninteractive
&& NILP (nomessage
))
933 message_with_string ("Loading %s (compiled; note unsafe, not compiled in Emacs)...done",
936 message_with_string ("Loading %s (source)...done", file
, 1);
938 message_with_string ("Loading %s (compiled; note, source file is newer)...done",
940 else /* The typical case; compiled file newer than source file. */
941 message_with_string ("Loading %s...done", file
, 1);
948 load_unwind (stream
) /* used as unwind-protect function in load */
951 fclose ((FILE *) (XFASTINT (XCAR (stream
)) << 16
952 | XFASTINT (XCDR (stream
))));
953 if (--load_in_progress
< 0) load_in_progress
= 0;
958 load_descriptor_unwind (oldlist
)
961 load_descriptor_list
= oldlist
;
965 /* Close all descriptors in use for Floads.
966 This is used when starting a subprocess. */
973 for (tail
= load_descriptor_list
; !NILP (tail
); tail
= XCDR (tail
))
974 emacs_close (XFASTINT (XCAR (tail
)));
979 complete_filename_p (pathname
)
980 Lisp_Object pathname
;
982 register const unsigned char *s
= SDATA (pathname
);
983 return (IS_DIRECTORY_SEP (s
[0])
984 || (SCHARS (pathname
) > 2
985 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2]))
995 DEFUN ("locate-file-internal", Flocate_file_internal
, Slocate_file_internal
, 2, 4, 0,
996 doc
: /* Search for FILENAME through PATH.
997 If SUFFIXES is non-nil, it should be a list of suffixes to append to
998 file name when searching.
999 If non-nil, PREDICATE is used instead of `file-readable-p'.
1000 PREDICATE can also be an integer to pass to the access(2) function,
1001 in which case file-name-handlers are ignored. */)
1002 (filename
, path
, suffixes
, predicate
)
1003 Lisp_Object filename
, path
, suffixes
, predicate
;
1006 int fd
= openp (path
, filename
, suffixes
, &file
, predicate
);
1007 if (NILP (predicate
) && fd
> 0)
1013 /* Search for a file whose name is STR, looking in directories
1014 in the Lisp list PATH, and trying suffixes from SUFFIX.
1015 On success, returns a file descriptor. On failure, returns -1.
1017 SUFFIXES is a list of strings containing possible suffixes.
1018 The empty suffix is automatically added iff the list is empty.
1020 PREDICATE non-nil means don't open the files,
1021 just look for one that satisfies the predicate. In this case,
1022 returns 1 on success. The predicate can be a lisp function or
1023 an integer to pass to `access' (in which case file-name-handlers
1026 If STOREPTR is nonzero, it points to a slot where the name of
1027 the file actually found should be stored as a Lisp string.
1028 nil is stored there on failure.
1030 If the file we find is remote, return -2
1031 but store the found remote file name in *STOREPTR. */
1034 openp (path
, str
, suffixes
, storeptr
, predicate
)
1035 Lisp_Object path
, str
;
1036 Lisp_Object suffixes
;
1037 Lisp_Object
*storeptr
;
1038 Lisp_Object predicate
;
1043 register char *fn
= buf
;
1046 Lisp_Object filename
;
1048 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
, gcpro6
;
1049 Lisp_Object string
, tail
, encoded_fn
;
1050 int max_suffix_len
= 0;
1052 for (tail
= suffixes
; CONSP (tail
); tail
= XCDR (tail
))
1054 CHECK_STRING_CAR (tail
);
1055 max_suffix_len
= max (max_suffix_len
,
1056 SBYTES (XCAR (tail
)));
1059 string
= filename
= Qnil
;
1060 GCPRO6 (str
, string
, filename
, path
, suffixes
, encoded_fn
);
1065 if (complete_filename_p (str
))
1068 for (; CONSP (path
); path
= XCDR (path
))
1070 filename
= Fexpand_file_name (str
, XCAR (path
));
1071 if (!complete_filename_p (filename
))
1072 /* If there are non-absolute elts in PATH (eg ".") */
1073 /* Of course, this could conceivably lose if luser sets
1074 default-directory to be something non-absolute... */
1076 filename
= Fexpand_file_name (filename
, current_buffer
->directory
);
1077 if (!complete_filename_p (filename
))
1078 /* Give up on this path element! */
1082 /* Calculate maximum size of any filename made from
1083 this path element/specified file name and any possible suffix. */
1084 want_size
= max_suffix_len
+ SBYTES (filename
) + 1;
1085 if (fn_size
< want_size
)
1086 fn
= (char *) alloca (fn_size
= 100 + want_size
);
1088 /* Loop over suffixes. */
1089 for (tail
= NILP (suffixes
) ? default_suffixes
: suffixes
;
1090 CONSP (tail
); tail
= XCDR (tail
))
1092 int lsuffix
= SBYTES (XCAR (tail
));
1093 Lisp_Object handler
;
1096 /* Concatenate path element/specified name with the suffix.
1097 If the directory starts with /:, remove that. */
1098 if (SCHARS (filename
) > 2
1099 && SREF (filename
, 0) == '/'
1100 && SREF (filename
, 1) == ':')
1102 strncpy (fn
, SDATA (filename
) + 2,
1103 SBYTES (filename
) - 2);
1104 fn
[SBYTES (filename
) - 2] = 0;
1108 strncpy (fn
, SDATA (filename
),
1110 fn
[SBYTES (filename
)] = 0;
1113 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
1114 strncat (fn
, SDATA (XCAR (tail
)), lsuffix
);
1116 /* Check that the file exists and is not a directory. */
1117 /* We used to only check for handlers on non-absolute file names:
1121 handler = Ffind_file_name_handler (filename, Qfile_exists_p);
1122 It's not clear why that was the case and it breaks things like
1123 (load "/bar.el") where the file is actually "/bar.el.gz". */
1124 handler
= Ffind_file_name_handler (filename
, Qfile_exists_p
);
1125 string
= build_string (fn
);
1126 if ((!NILP (handler
) || !NILP (predicate
)) && !NATNUMP (predicate
))
1128 if (NILP (predicate
))
1129 exists
= !NILP (Ffile_readable_p (string
));
1131 exists
= !NILP (call1 (predicate
, string
));
1132 if (exists
&& !NILP (Ffile_directory_p (string
)))
1137 /* We succeeded; return this descriptor and filename. */
1148 encoded_fn
= ENCODE_FILE (string
);
1149 pfn
= SDATA (encoded_fn
);
1150 exists
= (stat (pfn
, &st
) >= 0
1151 && (st
.st_mode
& S_IFMT
) != S_IFDIR
);
1154 /* Check that we can access or open it. */
1155 if (NATNUMP (predicate
))
1156 fd
= (access (pfn
, XFASTINT (predicate
)) == 0) ? 1 : -1;
1158 fd
= emacs_open (pfn
, O_RDONLY
, 0);
1162 /* We succeeded; return this descriptor and filename. */
1180 /* Merge the list we've accumulated of globals from the current input source
1181 into the load_history variable. The details depend on whether
1182 the source has an associated file name or not. */
1185 build_load_history (stream
, source
)
1189 register Lisp_Object tail
, prev
, newelt
;
1190 register Lisp_Object tem
, tem2
;
1191 register int foundit
, loading
;
1193 loading
= stream
|| !NARROWED
;
1195 tail
= Vload_history
;
1198 while (CONSP (tail
))
1202 /* Find the feature's previous assoc list... */
1203 if (!NILP (Fequal (source
, Fcar (tem
))))
1207 /* If we're loading, remove it. */
1211 Vload_history
= XCDR (tail
);
1213 Fsetcdr (prev
, XCDR (tail
));
1216 /* Otherwise, cons on new symbols that are not already members. */
1219 tem2
= Vcurrent_load_list
;
1221 while (CONSP (tem2
))
1223 newelt
= XCAR (tem2
);
1225 if (NILP (Fmember (newelt
, tem
)))
1226 Fsetcar (tail
, Fcons (XCAR (tem
),
1227 Fcons (newelt
, XCDR (tem
))));
1240 /* If we're loading, cons the new assoc onto the front of load-history,
1241 the most-recently-loaded position. Also do this if we didn't find
1242 an existing member for the current source. */
1243 if (loading
|| !foundit
)
1244 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
1249 unreadpure (junk
) /* Used as unwind-protect function in readevalloop */
1257 readevalloop_1 (old
)
1260 load_convert_to_unibyte
= ! NILP (old
);
1264 /* Signal an `end-of-file' error, if possible with file name
1268 end_of_file_error ()
1272 if (STRINGP (Vload_file_name
))
1273 data
= Fcons (Vload_file_name
, Qnil
);
1277 Fsignal (Qend_of_file
, data
);
1280 /* UNIBYTE specifies how to set load_convert_to_unibyte
1281 for this invocation.
1282 READFUN, if non-nil, is used instead of `read'. */
1285 readevalloop (readcharfun
, stream
, sourcename
, evalfun
, printflag
, unibyte
, readfun
)
1286 Lisp_Object readcharfun
;
1288 Lisp_Object sourcename
;
1289 Lisp_Object (*evalfun
) ();
1291 Lisp_Object unibyte
, readfun
;
1294 register Lisp_Object val
;
1295 int count
= SPECPDL_INDEX ();
1296 struct gcpro gcpro1
;
1297 struct buffer
*b
= 0;
1298 int continue_reading_p
;
1300 if (BUFFERP (readcharfun
))
1301 b
= XBUFFER (readcharfun
);
1302 else if (MARKERP (readcharfun
))
1303 b
= XMARKER (readcharfun
)->buffer
;
1305 specbind (Qstandard_input
, readcharfun
);
1306 specbind (Qcurrent_load_list
, Qnil
);
1307 record_unwind_protect (readevalloop_1
, load_convert_to_unibyte
? Qt
: Qnil
);
1308 load_convert_to_unibyte
= !NILP (unibyte
);
1310 readchar_backlog
= -1;
1312 GCPRO1 (sourcename
);
1314 LOADHIST_ATTACH (sourcename
);
1316 continue_reading_p
= 1;
1317 while (continue_reading_p
)
1319 if (b
!= 0 && NILP (b
->name
))
1320 error ("Reading from killed buffer");
1326 while ((c
= READCHAR
) != '\n' && c
!= -1);
1331 /* Ignore whitespace here, so we can detect eof. */
1332 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r')
1335 if (!NILP (Vpurify_flag
) && c
== '(')
1337 int count1
= SPECPDL_INDEX ();
1338 record_unwind_protect (unreadpure
, Qnil
);
1339 val
= read_list (-1, readcharfun
);
1340 unbind_to (count1
, Qnil
);
1345 read_objects
= Qnil
;
1346 if (!NILP (readfun
))
1348 val
= call1 (readfun
, readcharfun
);
1350 /* If READCHARFUN has set point to ZV, we should
1351 stop reading, even if the form read sets point
1352 to a different value when evaluated. */
1353 if (BUFFERP (readcharfun
))
1355 struct buffer
*b
= XBUFFER (readcharfun
);
1356 if (BUF_PT (b
) == BUF_ZV (b
))
1357 continue_reading_p
= 0;
1360 else if (! NILP (Vload_read_function
))
1361 val
= call1 (Vload_read_function
, readcharfun
);
1363 val
= read_internal_start (readcharfun
, Qnil
, Qnil
);
1366 val
= (*evalfun
) (val
);
1370 Vvalues
= Fcons (val
, Vvalues
);
1371 if (EQ (Vstandard_output
, Qt
))
1378 build_load_history (stream
, sourcename
);
1381 unbind_to (count
, Qnil
);
1384 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 5, "",
1385 doc
: /* Execute the current buffer as Lisp code.
1386 Programs can pass two arguments, BUFFER and PRINTFLAG.
1387 BUFFER is the buffer to evaluate (nil means use current buffer).
1388 PRINTFLAG controls printing of output:
1389 nil means discard it; anything else is stream for print.
1391 If the optional third argument FILENAME is non-nil,
1392 it specifies the file name to use for `load-history'.
1393 The optional fourth argument UNIBYTE specifies `load-convert-to-unibyte'
1394 for this invocation.
1396 The optional fifth argument DO-ALLOW-PRINT, if non-nil, specifies that
1397 `print' and related functions should work normally even if PRINTFLAG is nil.
1399 This function preserves the position of point. */)
1400 (buffer
, printflag
, filename
, unibyte
, do_allow_print
)
1401 Lisp_Object buffer
, printflag
, filename
, unibyte
, do_allow_print
;
1403 int count
= SPECPDL_INDEX ();
1404 Lisp_Object tem
, buf
;
1407 buf
= Fcurrent_buffer ();
1409 buf
= Fget_buffer (buffer
);
1411 error ("No such buffer");
1413 if (NILP (printflag
) && NILP (do_allow_print
))
1418 if (NILP (filename
))
1419 filename
= XBUFFER (buf
)->filename
;
1421 specbind (Qstandard_output
, tem
);
1422 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1423 BUF_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
1424 readevalloop (buf
, 0, filename
, Feval
, !NILP (printflag
), unibyte
, Qnil
);
1425 unbind_to (count
, Qnil
);
1430 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 4, "r",
1431 doc
: /* Execute the region as Lisp code.
1432 When called from programs, expects two arguments,
1433 giving starting and ending indices in the current buffer
1434 of the text to be executed.
1435 Programs can pass third argument PRINTFLAG which controls output:
1436 nil means discard it; anything else is stream for printing it.
1437 Also the fourth argument READ-FUNCTION, if non-nil, is used
1438 instead of `read' to read each expression. It gets one argument
1439 which is the input stream for reading characters.
1441 This function does not move point. */)
1442 (start
, end
, printflag
, read_function
)
1443 Lisp_Object start
, end
, printflag
, read_function
;
1445 int count
= SPECPDL_INDEX ();
1446 Lisp_Object tem
, cbuf
;
1448 cbuf
= Fcurrent_buffer ();
1450 if (NILP (printflag
))
1454 specbind (Qstandard_output
, tem
);
1456 if (NILP (printflag
))
1457 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1458 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1460 /* This both uses start and checks its type. */
1462 Fnarrow_to_region (make_number (BEGV
), end
);
1463 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
, Feval
,
1464 !NILP (printflag
), Qnil
, read_function
);
1466 return unbind_to (count
, Qnil
);
1470 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
1471 doc
: /* Read one Lisp expression as text from STREAM, return as Lisp object.
1472 If STREAM is nil, use the value of `standard-input' (which see).
1473 STREAM or the value of `standard-input' may be:
1474 a buffer (read from point and advance it)
1475 a marker (read from where it points and advance it)
1476 a function (call it with no arguments for each character,
1477 call it with a char as argument to push a char back)
1478 a string (takes text from string, starting at the beginning)
1479 t (read text line using minibuffer and use it, or read from
1480 standard input in batch mode). */)
1485 stream
= Vstandard_input
;
1486 if (EQ (stream
, Qt
))
1487 stream
= Qread_char
;
1488 if (EQ (stream
, Qread_char
))
1489 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
1491 return read_internal_start (stream
, Qnil
, Qnil
);
1494 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
1495 doc
: /* Read one Lisp expression which is represented as text by STRING.
1496 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
1497 START and END optionally delimit a substring of STRING from which to read;
1498 they default to 0 and (length STRING) respectively. */)
1499 (string
, start
, end
)
1500 Lisp_Object string
, start
, end
;
1503 CHECK_STRING (string
);
1504 /* read_internal_start sets read_from_string_index. */
1505 ret
= read_internal_start (string
, start
, end
);
1506 return Fcons (ret
, make_number (read_from_string_index
));
1509 /* Function to set up the global context we need in toplevel read
1512 read_internal_start (stream
, start
, end
)
1514 Lisp_Object start
; /* Only used when stream is a string. */
1515 Lisp_Object end
; /* Only used when stream is a string. */
1519 readchar_backlog
= -1;
1521 new_backquote_flag
= 0;
1522 read_objects
= Qnil
;
1523 if (EQ (Vread_with_symbol_positions
, Qt
)
1524 || EQ (Vread_with_symbol_positions
, stream
))
1525 Vread_symbol_positions_list
= Qnil
;
1527 if (STRINGP (stream
))
1529 int startval
, endval
;
1531 endval
= SCHARS (stream
);
1535 endval
= XINT (end
);
1536 if (endval
< 0 || endval
> SCHARS (stream
))
1537 args_out_of_range (stream
, end
);
1544 CHECK_NUMBER (start
);
1545 startval
= XINT (start
);
1546 if (startval
< 0 || startval
> endval
)
1547 args_out_of_range (stream
, start
);
1549 read_from_string_index
= startval
;
1550 read_from_string_index_byte
= string_char_to_byte (stream
, startval
);
1551 read_from_string_limit
= endval
;
1554 retval
= read0 (stream
);
1555 if (EQ (Vread_with_symbol_positions
, Qt
)
1556 || EQ (Vread_with_symbol_positions
, stream
))
1557 Vread_symbol_positions_list
= Fnreverse (Vread_symbol_positions_list
);
1561 /* Use this for recursive reads, in contexts where internal tokens
1566 Lisp_Object readcharfun
;
1568 register Lisp_Object val
;
1571 val
= read1 (readcharfun
, &c
, 0);
1573 Fsignal (Qinvalid_read_syntax
, Fcons (Fmake_string (make_number (1),
1580 static int read_buffer_size
;
1581 static char *read_buffer
;
1583 /* Read multibyte form and return it as a character. C is a first
1584 byte of multibyte form, and rest of them are read from
1588 read_multibyte (c
, readcharfun
)
1590 Lisp_Object readcharfun
;
1592 /* We need the actual character code of this multibyte
1594 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
1602 while ((c
= READCHAR
) >= 0xA0
1603 && len
< MAX_MULTIBYTE_LENGTH
)
1609 if (UNIBYTE_STR_AS_MULTIBYTE_P (str
, len
, bytes
))
1610 return STRING_CHAR (str
, len
);
1611 /* The byte sequence is not valid as multibyte. Unread all bytes
1612 but the first one, and return the first byte. */
1618 /* Read a \-escape sequence, assuming we already read the `\'.
1619 If the escape sequence forces unibyte, store 1 into *BYTEREP.
1620 If the escape sequence forces multibyte, store 2 into *BYTEREP.
1621 Otherwise store 0 into *BYTEREP. */
1624 read_escape (readcharfun
, stringp
, byterep
)
1625 Lisp_Object readcharfun
;
1629 register int c
= READCHAR
;
1636 end_of_file_error ();
1666 error ("Invalid escape character syntax");
1669 c
= read_escape (readcharfun
, 0, byterep
);
1670 return c
| meta_modifier
;
1675 error ("Invalid escape character syntax");
1678 c
= read_escape (readcharfun
, 0, byterep
);
1679 return c
| shift_modifier
;
1684 error ("Invalid escape character syntax");
1687 c
= read_escape (readcharfun
, 0, byterep
);
1688 return c
| hyper_modifier
;
1693 error ("Invalid escape character syntax");
1696 c
= read_escape (readcharfun
, 0, byterep
);
1697 return c
| alt_modifier
;
1702 error ("Invalid escape character syntax");
1705 c
= read_escape (readcharfun
, 0, byterep
);
1706 return c
| super_modifier
;
1711 error ("Invalid escape character syntax");
1715 c
= read_escape (readcharfun
, 0, byterep
);
1716 if ((c
& ~CHAR_MODIFIER_MASK
) == '?')
1717 return 0177 | (c
& CHAR_MODIFIER_MASK
);
1718 else if (! SINGLE_BYTE_CHAR_P ((c
& ~CHAR_MODIFIER_MASK
)))
1719 return c
| ctrl_modifier
;
1720 /* ASCII control chars are made from letters (both cases),
1721 as well as the non-letters within 0100...0137. */
1722 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
1723 return (c
& (037 | ~0177));
1724 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
1725 return (c
& (037 | ~0177));
1727 return c
| ctrl_modifier
;
1737 /* An octal escape, as in ANSI C. */
1739 register int i
= c
- '0';
1740 register int count
= 0;
1743 if ((c
= READCHAR
) >= '0' && c
<= '7')
1760 /* A hex escape, as in ANSI C. */
1766 if (c
>= '0' && c
<= '9')
1771 else if ((c
>= 'a' && c
<= 'f')
1772 || (c
>= 'A' && c
<= 'F'))
1775 if (c
>= 'a' && c
<= 'f')
1792 if (BASE_LEADING_CODE_P (c
))
1793 c
= read_multibyte (c
, readcharfun
);
1799 /* Read an integer in radix RADIX using READCHARFUN to read
1800 characters. RADIX must be in the interval [2..36]; if it isn't, a
1801 read error is signaled . Value is the integer read. Signals an
1802 error if encountering invalid read syntax or if RADIX is out of
1806 read_integer (readcharfun
, radix
)
1807 Lisp_Object readcharfun
;
1810 int ndigits
= 0, invalid_p
, c
, sign
= 0;
1811 EMACS_INT number
= 0;
1813 if (radix
< 2 || radix
> 36)
1817 number
= ndigits
= invalid_p
= 0;
1833 if (c
>= '0' && c
<= '9')
1835 else if (c
>= 'a' && c
<= 'z')
1836 digit
= c
- 'a' + 10;
1837 else if (c
>= 'A' && c
<= 'Z')
1838 digit
= c
- 'A' + 10;
1845 if (digit
< 0 || digit
>= radix
)
1848 number
= radix
* number
+ digit
;
1854 if (ndigits
== 0 || invalid_p
)
1857 sprintf (buf
, "integer, radix %d", radix
);
1858 Fsignal (Qinvalid_read_syntax
, Fcons (build_string (buf
), Qnil
));
1861 return make_number (sign
* number
);
1865 /* Convert unibyte text in read_buffer to multibyte.
1867 Initially, *P is a pointer after the end of the unibyte text, and
1868 the pointer *END points after the end of read_buffer.
1870 If read_buffer doesn't have enough room to hold the result
1871 of the conversion, reallocate it and adjust *P and *END.
1873 At the end, make *P point after the result of the conversion, and
1874 return in *NCHARS the number of characters in the converted
1878 to_multibyte (p
, end
, nchars
)
1884 parse_str_as_multibyte (read_buffer
, *p
- read_buffer
, &nbytes
, nchars
);
1885 if (read_buffer_size
< 2 * nbytes
)
1887 int offset
= *p
- read_buffer
;
1888 read_buffer_size
= 2 * max (read_buffer_size
, nbytes
);
1889 read_buffer
= (char *) xrealloc (read_buffer
, read_buffer_size
);
1890 *p
= read_buffer
+ offset
;
1891 *end
= read_buffer
+ read_buffer_size
;
1894 if (nbytes
!= *nchars
)
1895 nbytes
= str_as_multibyte (read_buffer
, read_buffer_size
,
1896 *p
- read_buffer
, nchars
);
1898 *p
= read_buffer
+ nbytes
;
1902 /* If the next token is ')' or ']' or '.', we store that character
1903 in *PCH and the return value is not interesting. Else, we store
1904 zero in *PCH and we read and return one lisp object.
1906 FIRST_IN_LIST is nonzero if this is the first element of a list. */
1909 read1 (readcharfun
, pch
, first_in_list
)
1910 register Lisp_Object readcharfun
;
1915 int uninterned_symbol
= 0;
1923 end_of_file_error ();
1928 return read_list (0, readcharfun
);
1931 return read_vector (readcharfun
, 0);
1948 tmp
= read_vector (readcharfun
, 0);
1949 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
1950 || XVECTOR (tmp
)->size
> CHAR_TABLE_STANDARD_SLOTS
+ 10)
1951 error ("Invalid size char-table");
1952 XSETCHAR_TABLE (tmp
, XCHAR_TABLE (tmp
));
1953 XCHAR_TABLE (tmp
)->top
= Qt
;
1962 tmp
= read_vector (readcharfun
, 0);
1963 if (XVECTOR (tmp
)->size
!= SUB_CHAR_TABLE_STANDARD_SLOTS
)
1964 error ("Invalid size char-table");
1965 XSETCHAR_TABLE (tmp
, XCHAR_TABLE (tmp
));
1966 XCHAR_TABLE (tmp
)->top
= Qnil
;
1969 Fsignal (Qinvalid_read_syntax
,
1970 Fcons (make_string ("#^^", 3), Qnil
));
1972 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#^", 2), Qnil
));
1977 length
= read1 (readcharfun
, pch
, first_in_list
);
1981 Lisp_Object tmp
, val
;
1982 int size_in_chars
= ((XFASTINT (length
) + BITS_PER_CHAR
- 1)
1986 tmp
= read1 (readcharfun
, pch
, first_in_list
);
1987 if (size_in_chars
!= SCHARS (tmp
)
1988 /* We used to print 1 char too many
1989 when the number of bits was a multiple of 8.
1990 Accept such input in case it came from an old version. */
1991 && ! (XFASTINT (length
)
1992 == (SCHARS (tmp
) - 1) * BITS_PER_CHAR
))
1993 Fsignal (Qinvalid_read_syntax
,
1994 Fcons (make_string ("#&...", 5), Qnil
));
1996 val
= Fmake_bool_vector (length
, Qnil
);
1997 bcopy (SDATA (tmp
), XBOOL_VECTOR (val
)->data
,
1999 /* Clear the extraneous bits in the last byte. */
2000 if (XINT (length
) != size_in_chars
* BITS_PER_CHAR
)
2001 XBOOL_VECTOR (val
)->data
[size_in_chars
- 1]
2002 &= (1 << (XINT (length
) % BITS_PER_CHAR
)) - 1;
2005 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#&...", 5),
2010 /* Accept compiled functions at read-time so that we don't have to
2011 build them using function calls. */
2013 tmp
= read_vector (readcharfun
, 1);
2014 return Fmake_byte_code (XVECTOR (tmp
)->size
,
2015 XVECTOR (tmp
)->contents
);
2020 struct gcpro gcpro1
;
2023 /* Read the string itself. */
2024 tmp
= read1 (readcharfun
, &ch
, 0);
2025 if (ch
!= 0 || !STRINGP (tmp
))
2026 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
2028 /* Read the intervals and their properties. */
2031 Lisp_Object beg
, end
, plist
;
2033 beg
= read1 (readcharfun
, &ch
, 0);
2038 end
= read1 (readcharfun
, &ch
, 0);
2040 plist
= read1 (readcharfun
, &ch
, 0);
2042 Fsignal (Qinvalid_read_syntax
,
2043 Fcons (build_string ("invalid string property list"),
2045 Fset_text_properties (beg
, end
, plist
, tmp
);
2051 /* #@NUMBER is used to skip NUMBER following characters.
2052 That's used in .elc files to skip over doc strings
2053 and function definitions. */
2058 /* Read a decimal integer. */
2059 while ((c
= READCHAR
) >= 0
2060 && c
>= '0' && c
<= '9')
2068 if (load_force_doc_strings
&& EQ (readcharfun
, Qget_file_char
))
2070 /* If we are supposed to force doc strings into core right now,
2071 record the last string that we skipped,
2072 and record where in the file it comes from. */
2074 /* But first exchange saved_doc_string
2075 with prev_saved_doc_string, so we save two strings. */
2077 char *temp
= saved_doc_string
;
2078 int temp_size
= saved_doc_string_size
;
2079 file_offset temp_pos
= saved_doc_string_position
;
2080 int temp_len
= saved_doc_string_length
;
2082 saved_doc_string
= prev_saved_doc_string
;
2083 saved_doc_string_size
= prev_saved_doc_string_size
;
2084 saved_doc_string_position
= prev_saved_doc_string_position
;
2085 saved_doc_string_length
= prev_saved_doc_string_length
;
2087 prev_saved_doc_string
= temp
;
2088 prev_saved_doc_string_size
= temp_size
;
2089 prev_saved_doc_string_position
= temp_pos
;
2090 prev_saved_doc_string_length
= temp_len
;
2093 if (saved_doc_string_size
== 0)
2095 saved_doc_string_size
= nskip
+ 100;
2096 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
2098 if (nskip
> saved_doc_string_size
)
2100 saved_doc_string_size
= nskip
+ 100;
2101 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
2102 saved_doc_string_size
);
2105 saved_doc_string_position
= file_tell (instream
);
2107 /* Copy that many characters into saved_doc_string. */
2108 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2109 saved_doc_string
[i
] = c
= READCHAR
;
2111 saved_doc_string_length
= i
;
2115 /* Skip that many characters. */
2116 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
2124 /* #! appears at the beginning of an executable file.
2125 Skip the first line. */
2131 return Vload_file_name
;
2133 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
2134 /* #:foo is the uninterned symbol named foo. */
2137 uninterned_symbol
= 1;
2141 /* Reader forms that can reuse previously read objects. */
2142 if (c
>= '0' && c
<= '9')
2147 /* Read a non-negative integer. */
2148 while (c
>= '0' && c
<= '9')
2154 /* #n=object returns object, but associates it with n for #n#. */
2157 /* Make a placeholder for #n# to use temporarily */
2158 Lisp_Object placeholder
;
2161 placeholder
= Fcons(Qnil
, Qnil
);
2162 cell
= Fcons (make_number (n
), placeholder
);
2163 read_objects
= Fcons (cell
, read_objects
);
2165 /* Read the object itself. */
2166 tem
= read0 (readcharfun
);
2168 /* Now put it everywhere the placeholder was... */
2169 substitute_object_in_subtree (tem
, placeholder
);
2171 /* ...and #n# will use the real value from now on. */
2172 Fsetcdr (cell
, tem
);
2176 /* #n# returns a previously read object. */
2179 tem
= Fassq (make_number (n
), read_objects
);
2182 /* Fall through to error message. */
2184 else if (c
== 'r' || c
== 'R')
2185 return read_integer (readcharfun
, n
);
2187 /* Fall through to error message. */
2189 else if (c
== 'x' || c
== 'X')
2190 return read_integer (readcharfun
, 16);
2191 else if (c
== 'o' || c
== 'O')
2192 return read_integer (readcharfun
, 8);
2193 else if (c
== 'b' || c
== 'B')
2194 return read_integer (readcharfun
, 2);
2197 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
2200 while ((c
= READCHAR
) >= 0 && c
!= '\n');
2205 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
2215 new_backquote_flag
++;
2216 value
= read0 (readcharfun
);
2217 new_backquote_flag
--;
2219 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
2223 if (new_backquote_flag
)
2225 Lisp_Object comma_type
= Qnil
;
2230 comma_type
= Qcomma_at
;
2232 comma_type
= Qcomma_dot
;
2235 if (ch
>= 0) UNREAD (ch
);
2236 comma_type
= Qcomma
;
2239 new_backquote_flag
--;
2240 value
= read0 (readcharfun
);
2241 new_backquote_flag
++;
2242 return Fcons (comma_type
, Fcons (value
, Qnil
));
2253 end_of_file_error ();
2256 c
= read_escape (readcharfun
, 0, &discard
);
2257 else if (BASE_LEADING_CODE_P (c
))
2258 c
= read_multibyte (c
, readcharfun
);
2260 return make_number (c
);
2265 char *p
= read_buffer
;
2266 char *end
= read_buffer
+ read_buffer_size
;
2268 /* 1 if we saw an escape sequence specifying
2269 a multibyte character, or a multibyte character. */
2270 int force_multibyte
= 0;
2271 /* 1 if we saw an escape sequence specifying
2272 a single-byte character. */
2273 int force_singlebyte
= 0;
2274 /* 1 if read_buffer contains multibyte text now. */
2275 int is_multibyte
= 0;
2279 while ((c
= READCHAR
) >= 0
2282 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2284 int offset
= p
- read_buffer
;
2285 read_buffer
= (char *) xrealloc (read_buffer
,
2286 read_buffer_size
*= 2);
2287 p
= read_buffer
+ offset
;
2288 end
= read_buffer
+ read_buffer_size
;
2295 c
= read_escape (readcharfun
, 1, &byterep
);
2297 /* C is -1 if \ newline has just been seen */
2300 if (p
== read_buffer
)
2306 force_singlebyte
= 1;
2307 else if (byterep
== 2)
2308 force_multibyte
= 1;
2311 /* A character that must be multibyte forces multibyte. */
2312 if (! SINGLE_BYTE_CHAR_P (c
& ~CHAR_MODIFIER_MASK
))
2313 force_multibyte
= 1;
2315 /* If we just discovered the need to be multibyte,
2316 convert the text accumulated thus far. */
2317 if (force_multibyte
&& ! is_multibyte
)
2320 to_multibyte (&p
, &end
, &nchars
);
2323 /* Allow `\C- ' and `\C-?'. */
2324 if (c
== (CHAR_CTL
| ' '))
2326 else if (c
== (CHAR_CTL
| '?'))
2331 /* Shift modifier is valid only with [A-Za-z]. */
2332 if ((c
& 0377) >= 'A' && (c
& 0377) <= 'Z')
2334 else if ((c
& 0377) >= 'a' && (c
& 0377) <= 'z')
2335 c
= (c
& ~CHAR_SHIFT
) - ('a' - 'A');
2339 /* Move the meta bit to the right place for a string. */
2340 c
= (c
& ~CHAR_META
) | 0x80;
2341 if (c
& CHAR_MODIFIER_MASK
)
2342 error ("Invalid modifier in string");
2345 p
+= CHAR_STRING (c
, p
);
2353 end_of_file_error ();
2355 /* If purifying, and string starts with \ newline,
2356 return zero instead. This is for doc strings
2357 that we are really going to find in etc/DOC.nn.nn */
2358 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
2359 return make_number (0);
2361 if (is_multibyte
|| force_singlebyte
)
2363 else if (load_convert_to_unibyte
)
2366 to_multibyte (&p
, &end
, &nchars
);
2367 if (p
- read_buffer
!= nchars
)
2369 string
= make_multibyte_string (read_buffer
, nchars
,
2371 return Fstring_make_unibyte (string
);
2373 /* We can make a unibyte string directly. */
2376 else if (EQ (readcharfun
, Qget_file_char
)
2377 || EQ (readcharfun
, Qlambda
))
2379 /* Nowadays, reading directly from a file is used only for
2380 compiled Emacs Lisp files, and those always use the
2381 Emacs internal encoding. Meanwhile, Qlambda is used
2382 for reading dynamic byte code (compiled with
2383 byte-compile-dynamic = t). So make the string multibyte
2384 if the string contains any multibyte sequences.
2385 (to_multibyte is a no-op if not.) */
2386 to_multibyte (&p
, &end
, &nchars
);
2387 is_multibyte
= (p
- read_buffer
) != nchars
;
2390 /* In all other cases, if we read these bytes as
2391 separate characters, treat them as separate characters now. */
2394 /* We want readchar_count to be the number of characters, not
2395 bytes. Hence we adjust for multibyte characters in the
2396 string. ... But it doesn't seem to be necessary, because
2397 READCHAR *does* read multibyte characters from buffers. */
2398 /* readchar_count -= (p - read_buffer) - nchars; */
2400 return make_pure_string (read_buffer
, nchars
, p
- read_buffer
,
2402 return make_specified_string (read_buffer
, nchars
, p
- read_buffer
,
2408 int next_char
= READCHAR
;
2411 if (next_char
<= 040
2412 || index ("\"'`,(", next_char
))
2418 /* Otherwise, we fall through! Note that the atom-reading loop
2419 below will now loop at least once, assuring that we will not
2420 try to UNREAD two characters in a row. */
2424 if (c
<= 040) goto retry
;
2426 char *p
= read_buffer
;
2430 char *end
= read_buffer
+ read_buffer_size
;
2433 && !(c
== '\"' || c
== '\'' || c
== ';'
2434 || c
== '(' || c
== ')'
2435 || c
== '[' || c
== ']' || c
== '#'))
2437 if (end
- p
< MAX_MULTIBYTE_LENGTH
)
2439 int offset
= p
- read_buffer
;
2440 read_buffer
= (char *) xrealloc (read_buffer
,
2441 read_buffer_size
*= 2);
2442 p
= read_buffer
+ offset
;
2443 end
= read_buffer
+ read_buffer_size
;
2450 end_of_file_error ();
2454 if (! SINGLE_BYTE_CHAR_P (c
))
2455 p
+= CHAR_STRING (c
, p
);
2464 int offset
= p
- read_buffer
;
2465 read_buffer
= (char *) xrealloc (read_buffer
,
2466 read_buffer_size
*= 2);
2467 p
= read_buffer
+ offset
;
2468 end
= read_buffer
+ read_buffer_size
;
2475 if (!quoted
&& !uninterned_symbol
)
2478 register Lisp_Object val
;
2480 if (*p1
== '+' || *p1
== '-') p1
++;
2481 /* Is it an integer? */
2484 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
2485 /* Integers can have trailing decimal points. */
2486 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
2488 /* It is an integer. */
2492 if (sizeof (int) == sizeof (EMACS_INT
))
2493 XSETINT (val
, atoi (read_buffer
));
2494 else if (sizeof (long) == sizeof (EMACS_INT
))
2495 XSETINT (val
, atol (read_buffer
));
2501 if (isfloat_string (read_buffer
))
2503 /* Compute NaN and infinities using 0.0 in a variable,
2504 to cope with compilers that think they are smarter
2510 /* Negate the value ourselves. This treats 0, NaNs,
2511 and infinity properly on IEEE floating point hosts,
2512 and works around a common bug where atof ("-0.0")
2514 int negative
= read_buffer
[0] == '-';
2516 /* The only way p[-1] can be 'F' or 'N', after isfloat_string
2517 returns 1, is if the input ends in e+INF or e+NaN. */
2524 value
= zero
/ zero
;
2527 value
= atof (read_buffer
+ negative
);
2531 return make_float (negative
? - value
: value
);
2535 Lisp_Object result
= uninterned_symbol
? make_symbol (read_buffer
)
2536 : intern (read_buffer
);
2537 if (EQ (Vread_with_symbol_positions
, Qt
)
2538 || EQ (Vread_with_symbol_positions
, readcharfun
))
2539 Vread_symbol_positions_list
=
2540 /* Kind of a hack; this will probably fail if characters
2541 in the symbol name were escaped. Not really a big
2543 Fcons (Fcons (result
,
2544 make_number (readchar_count
2545 - XFASTINT (Flength (Fsymbol_name (result
))))),
2546 Vread_symbol_positions_list
);
2554 /* List of nodes we've seen during substitute_object_in_subtree. */
2555 static Lisp_Object seen_list
;
2558 substitute_object_in_subtree (object
, placeholder
)
2560 Lisp_Object placeholder
;
2562 Lisp_Object check_object
;
2564 /* We haven't seen any objects when we start. */
2567 /* Make all the substitutions. */
2569 = substitute_object_recurse (object
, placeholder
, object
);
2571 /* Clear seen_list because we're done with it. */
2574 /* The returned object here is expected to always eq the
2576 if (!EQ (check_object
, object
))
2577 error ("Unexpected mutation error in reader");
2580 /* Feval doesn't get called from here, so no gc protection is needed. */
2581 #define SUBSTITUTE(get_val, set_val) \
2583 Lisp_Object old_value = get_val; \
2584 Lisp_Object true_value \
2585 = substitute_object_recurse (object, placeholder,\
2588 if (!EQ (old_value, true_value)) \
2595 substitute_object_recurse (object
, placeholder
, subtree
)
2597 Lisp_Object placeholder
;
2598 Lisp_Object subtree
;
2600 /* If we find the placeholder, return the target object. */
2601 if (EQ (placeholder
, subtree
))
2604 /* If we've been to this node before, don't explore it again. */
2605 if (!EQ (Qnil
, Fmemq (subtree
, seen_list
)))
2608 /* If this node can be the entry point to a cycle, remember that
2609 we've seen it. It can only be such an entry point if it was made
2610 by #n=, which means that we can find it as a value in
2612 if (!EQ (Qnil
, Frassq (subtree
, read_objects
)))
2613 seen_list
= Fcons (subtree
, seen_list
);
2615 /* Recurse according to subtree's type.
2616 Every branch must return a Lisp_Object. */
2617 switch (XTYPE (subtree
))
2619 case Lisp_Vectorlike
:
2622 int length
= XINT (Flength(subtree
));
2623 for (i
= 0; i
< length
; i
++)
2625 Lisp_Object idx
= make_number (i
);
2626 SUBSTITUTE (Faref (subtree
, idx
),
2627 Faset (subtree
, idx
, true_value
));
2634 SUBSTITUTE (Fcar_safe (subtree
),
2635 Fsetcar (subtree
, true_value
));
2636 SUBSTITUTE (Fcdr_safe (subtree
),
2637 Fsetcdr (subtree
, true_value
));
2643 /* Check for text properties in each interval.
2644 substitute_in_interval contains part of the logic. */
2646 INTERVAL root_interval
= STRING_INTERVALS (subtree
);
2647 Lisp_Object arg
= Fcons (object
, placeholder
);
2649 traverse_intervals_noorder (root_interval
,
2650 &substitute_in_interval
, arg
);
2655 /* Other types don't recurse any further. */
2661 /* Helper function for substitute_object_recurse. */
2663 substitute_in_interval (interval
, arg
)
2667 Lisp_Object object
= Fcar (arg
);
2668 Lisp_Object placeholder
= Fcdr (arg
);
2670 SUBSTITUTE(interval
->plist
, interval
->plist
= true_value
);
2689 if (*cp
== '+' || *cp
== '-')
2692 if (*cp
>= '0' && *cp
<= '9')
2695 while (*cp
>= '0' && *cp
<= '9')
2703 if (*cp
>= '0' && *cp
<= '9')
2706 while (*cp
>= '0' && *cp
<= '9')
2709 if (*cp
== 'e' || *cp
== 'E')
2713 if (*cp
== '+' || *cp
== '-')
2717 if (*cp
>= '0' && *cp
<= '9')
2720 while (*cp
>= '0' && *cp
<= '9')
2723 else if (cp
== start
)
2725 else if (cp
[-1] == '+' && cp
[0] == 'I' && cp
[1] == 'N' && cp
[2] == 'F')
2730 else if (cp
[-1] == '+' && cp
[0] == 'N' && cp
[1] == 'a' && cp
[2] == 'N')
2736 return (((*cp
== 0) || (*cp
== ' ') || (*cp
== '\t') || (*cp
== '\n') || (*cp
== '\r') || (*cp
== '\f'))
2737 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
2738 || state
== (DOT_CHAR
|TRAIL_INT
)
2739 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
2740 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
2741 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
2746 read_vector (readcharfun
, bytecodeflag
)
2747 Lisp_Object readcharfun
;
2752 register Lisp_Object
*ptr
;
2753 register Lisp_Object tem
, item
, vector
;
2754 register struct Lisp_Cons
*otem
;
2757 tem
= read_list (1, readcharfun
);
2758 len
= Flength (tem
);
2759 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
2761 size
= XVECTOR (vector
)->size
;
2762 ptr
= XVECTOR (vector
)->contents
;
2763 for (i
= 0; i
< size
; i
++)
2766 /* If `load-force-doc-strings' is t when reading a lazily-loaded
2767 bytecode object, the docstring containing the bytecode and
2768 constants values must be treated as unibyte and passed to
2769 Fread, to get the actual bytecode string and constants vector. */
2770 if (bytecodeflag
&& load_force_doc_strings
)
2772 if (i
== COMPILED_BYTECODE
)
2774 if (!STRINGP (item
))
2775 error ("invalid byte code");
2777 /* Delay handling the bytecode slot until we know whether
2778 it is lazily-loaded (we can tell by whether the
2779 constants slot is nil). */
2780 ptr
[COMPILED_CONSTANTS
] = item
;
2783 else if (i
== COMPILED_CONSTANTS
)
2785 Lisp_Object bytestr
= ptr
[COMPILED_CONSTANTS
];
2789 /* Coerce string to unibyte (like string-as-unibyte,
2790 but without generating extra garbage and
2791 guaranteeing no change in the contents). */
2792 STRING_SET_CHARS (bytestr
, SBYTES (bytestr
));
2793 STRING_SET_UNIBYTE (bytestr
);
2795 item
= Fread (bytestr
);
2797 error ("invalid byte code");
2799 otem
= XCONS (item
);
2800 bytestr
= XCAR (item
);
2805 /* Now handle the bytecode slot. */
2806 ptr
[COMPILED_BYTECODE
] = read_pure
? Fpurecopy (bytestr
) : bytestr
;
2809 ptr
[i
] = read_pure
? Fpurecopy (item
) : item
;
2817 /* FLAG = 1 means check for ] to terminate rather than ) and .
2818 FLAG = -1 means check for starting with defun
2819 and make structure pure. */
2822 read_list (flag
, readcharfun
)
2824 register Lisp_Object readcharfun
;
2826 /* -1 means check next element for defun,
2827 0 means don't check,
2828 1 means already checked and found defun. */
2829 int defunflag
= flag
< 0 ? -1 : 0;
2830 Lisp_Object val
, tail
;
2831 register Lisp_Object elt
, tem
;
2832 struct gcpro gcpro1
, gcpro2
;
2833 /* 0 is the normal case.
2834 1 means this list is a doc reference; replace it with the number 0.
2835 2 means this list is a doc reference; replace it with the doc string. */
2836 int doc_reference
= 0;
2838 /* Initialize this to 1 if we are reading a list. */
2839 int first_in_list
= flag
<= 0;
2848 elt
= read1 (readcharfun
, &ch
, first_in_list
);
2853 /* While building, if the list starts with #$, treat it specially. */
2854 if (EQ (elt
, Vload_file_name
)
2856 && !NILP (Vpurify_flag
))
2858 if (NILP (Vdoc_file_name
))
2859 /* We have not yet called Snarf-documentation, so assume
2860 this file is described in the DOC-MM.NN file
2861 and Snarf-documentation will fill in the right value later.
2862 For now, replace the whole list with 0. */
2865 /* We have already called Snarf-documentation, so make a relative
2866 file name for this file, so it can be found properly
2867 in the installed Lisp directory.
2868 We don't use Fexpand_file_name because that would make
2869 the directory absolute now. */
2870 elt
= concat2 (build_string ("../lisp/"),
2871 Ffile_name_nondirectory (elt
));
2873 else if (EQ (elt
, Vload_file_name
)
2875 && load_force_doc_strings
)
2884 Fsignal (Qinvalid_read_syntax
,
2885 Fcons (make_string (") or . in a vector", 18), Qnil
));
2893 XSETCDR (tail
, read0 (readcharfun
));
2895 val
= read0 (readcharfun
);
2896 read1 (readcharfun
, &ch
, 0);
2900 if (doc_reference
== 1)
2901 return make_number (0);
2902 if (doc_reference
== 2)
2904 /* Get a doc string from the file we are loading.
2905 If it's in saved_doc_string, get it from there. */
2906 int pos
= XINT (XCDR (val
));
2907 /* Position is negative for user variables. */
2908 if (pos
< 0) pos
= -pos
;
2909 if (pos
>= saved_doc_string_position
2910 && pos
< (saved_doc_string_position
2911 + saved_doc_string_length
))
2913 int start
= pos
- saved_doc_string_position
;
2916 /* Process quoting with ^A,
2917 and find the end of the string,
2918 which is marked with ^_ (037). */
2919 for (from
= start
, to
= start
;
2920 saved_doc_string
[from
] != 037;)
2922 int c
= saved_doc_string
[from
++];
2925 c
= saved_doc_string
[from
++];
2927 saved_doc_string
[to
++] = c
;
2929 saved_doc_string
[to
++] = 0;
2931 saved_doc_string
[to
++] = 037;
2934 saved_doc_string
[to
++] = c
;
2937 return make_string (saved_doc_string
+ start
,
2940 /* Look in prev_saved_doc_string the same way. */
2941 else if (pos
>= prev_saved_doc_string_position
2942 && pos
< (prev_saved_doc_string_position
2943 + prev_saved_doc_string_length
))
2945 int start
= pos
- prev_saved_doc_string_position
;
2948 /* Process quoting with ^A,
2949 and find the end of the string,
2950 which is marked with ^_ (037). */
2951 for (from
= start
, to
= start
;
2952 prev_saved_doc_string
[from
] != 037;)
2954 int c
= prev_saved_doc_string
[from
++];
2957 c
= prev_saved_doc_string
[from
++];
2959 prev_saved_doc_string
[to
++] = c
;
2961 prev_saved_doc_string
[to
++] = 0;
2963 prev_saved_doc_string
[to
++] = 037;
2966 prev_saved_doc_string
[to
++] = c
;
2969 return make_string (prev_saved_doc_string
+ start
,
2973 return get_doc_string (val
, 0, 0);
2978 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string (". in wrong context", 18), Qnil
));
2980 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("] in a list", 11), Qnil
));
2982 tem
= (read_pure
&& flag
<= 0
2983 ? pure_cons (elt
, Qnil
)
2984 : Fcons (elt
, Qnil
));
2986 XSETCDR (tail
, tem
);
2991 defunflag
= EQ (elt
, Qdefun
);
2992 else if (defunflag
> 0)
2997 Lisp_Object Vobarray
;
2998 Lisp_Object initial_obarray
;
3000 /* oblookup stores the bucket number here, for the sake of Funintern. */
3002 int oblookup_last_bucket_number
;
3004 static int hash_string ();
3006 /* Get an error if OBARRAY is not an obarray.
3007 If it is one, return it. */
3010 check_obarray (obarray
)
3011 Lisp_Object obarray
;
3013 while (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3015 /* If Vobarray is now invalid, force it to be valid. */
3016 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
3018 obarray
= wrong_type_argument (Qvectorp
, obarray
);
3023 /* Intern the C string STR: return a symbol with that name,
3024 interned in the current obarray. */
3031 int len
= strlen (str
);
3032 Lisp_Object obarray
;
3035 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
3036 obarray
= check_obarray (obarray
);
3037 tem
= oblookup (obarray
, str
, len
, len
);
3040 return Fintern (make_string (str
, len
), obarray
);
3043 /* Create an uninterned symbol with name STR. */
3049 int len
= strlen (str
);
3051 return Fmake_symbol ((!NILP (Vpurify_flag
)
3052 ? make_pure_string (str
, len
, len
, 0)
3053 : make_string (str
, len
)));
3056 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
3057 doc
: /* Return the canonical symbol whose name is STRING.
3058 If there is none, one is created by this function and returned.
3059 A second optional argument specifies the obarray to use;
3060 it defaults to the value of `obarray'. */)
3062 Lisp_Object string
, obarray
;
3064 register Lisp_Object tem
, sym
, *ptr
;
3066 if (NILP (obarray
)) obarray
= Vobarray
;
3067 obarray
= check_obarray (obarray
);
3069 CHECK_STRING (string
);
3071 tem
= oblookup (obarray
, SDATA (string
),
3074 if (!INTEGERP (tem
))
3077 if (!NILP (Vpurify_flag
))
3078 string
= Fpurecopy (string
);
3079 sym
= Fmake_symbol (string
);
3081 if (EQ (obarray
, initial_obarray
))
3082 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3084 XSYMBOL (sym
)->interned
= SYMBOL_INTERNED
;
3086 if ((SREF (string
, 0) == ':')
3087 && EQ (obarray
, initial_obarray
))
3089 XSYMBOL (sym
)->constant
= 1;
3090 XSYMBOL (sym
)->value
= sym
;
3093 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
3095 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
3097 XSYMBOL (sym
)->next
= 0;
3102 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
3103 doc
: /* Return the canonical symbol named NAME, or nil if none exists.
3104 NAME may be a string or a symbol. If it is a symbol, that exact
3105 symbol is searched for.
3106 A second optional argument specifies the obarray to use;
3107 it defaults to the value of `obarray'. */)
3109 Lisp_Object name
, obarray
;
3111 register Lisp_Object tem
, string
;
3113 if (NILP (obarray
)) obarray
= Vobarray
;
3114 obarray
= check_obarray (obarray
);
3116 if (!SYMBOLP (name
))
3118 CHECK_STRING (name
);
3122 string
= SYMBOL_NAME (name
);
3124 tem
= oblookup (obarray
, SDATA (string
), SCHARS (string
), SBYTES (string
));
3125 if (INTEGERP (tem
) || (SYMBOLP (name
) && !EQ (name
, tem
)))
3131 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
3132 doc
: /* Delete the symbol named NAME, if any, from OBARRAY.
3133 The value is t if a symbol was found and deleted, nil otherwise.
3134 NAME may be a string or a symbol. If it is a symbol, that symbol
3135 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
3136 OBARRAY defaults to the value of the variable `obarray'. */)
3138 Lisp_Object name
, obarray
;
3140 register Lisp_Object string
, tem
;
3143 if (NILP (obarray
)) obarray
= Vobarray
;
3144 obarray
= check_obarray (obarray
);
3147 string
= SYMBOL_NAME (name
);
3150 CHECK_STRING (name
);
3154 tem
= oblookup (obarray
, SDATA (string
),
3159 /* If arg was a symbol, don't delete anything but that symbol itself. */
3160 if (SYMBOLP (name
) && !EQ (name
, tem
))
3163 XSYMBOL (tem
)->interned
= SYMBOL_UNINTERNED
;
3164 XSYMBOL (tem
)->constant
= 0;
3165 XSYMBOL (tem
)->indirect_variable
= 0;
3167 hash
= oblookup_last_bucket_number
;
3169 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
3171 if (XSYMBOL (tem
)->next
)
3172 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
3174 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
3178 Lisp_Object tail
, following
;
3180 for (tail
= XVECTOR (obarray
)->contents
[hash
];
3181 XSYMBOL (tail
)->next
;
3184 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
3185 if (EQ (following
, tem
))
3187 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
3196 /* Return the symbol in OBARRAY whose names matches the string
3197 of SIZE characters (SIZE_BYTE bytes) at PTR.
3198 If there is no such symbol in OBARRAY, return nil.
3200 Also store the bucket number in oblookup_last_bucket_number. */
3203 oblookup (obarray
, ptr
, size
, size_byte
)
3204 Lisp_Object obarray
;
3205 register const char *ptr
;
3206 int size
, size_byte
;
3210 register Lisp_Object tail
;
3211 Lisp_Object bucket
, tem
;
3213 if (!VECTORP (obarray
)
3214 || (obsize
= XVECTOR (obarray
)->size
) == 0)
3216 obarray
= check_obarray (obarray
);
3217 obsize
= XVECTOR (obarray
)->size
;
3219 /* This is sometimes needed in the middle of GC. */
3220 obsize
&= ~ARRAY_MARK_FLAG
;
3221 /* Combining next two lines breaks VMS C 2.3. */
3222 hash
= hash_string (ptr
, size_byte
);
3224 bucket
= XVECTOR (obarray
)->contents
[hash
];
3225 oblookup_last_bucket_number
= hash
;
3226 if (XFASTINT (bucket
) == 0)
3228 else if (!SYMBOLP (bucket
))
3229 error ("Bad data in guts of obarray"); /* Like CADR error message */
3231 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
3233 if (SBYTES (SYMBOL_NAME (tail
)) == size_byte
3234 && SCHARS (SYMBOL_NAME (tail
)) == size
3235 && !bcmp (SDATA (SYMBOL_NAME (tail
)), ptr
, size_byte
))
3237 else if (XSYMBOL (tail
)->next
== 0)
3240 XSETINT (tem
, hash
);
3245 hash_string (ptr
, len
)
3246 const unsigned char *ptr
;
3249 register const unsigned char *p
= ptr
;
3250 register const unsigned char *end
= p
+ len
;
3251 register unsigned char c
;
3252 register int hash
= 0;
3257 if (c
>= 0140) c
-= 40;
3258 hash
= ((hash
<<3) + (hash
>>28) + c
);
3260 return hash
& 07777777777;
3264 map_obarray (obarray
, fn
, arg
)
3265 Lisp_Object obarray
;
3266 void (*fn
) P_ ((Lisp_Object
, Lisp_Object
));
3270 register Lisp_Object tail
;
3271 CHECK_VECTOR (obarray
);
3272 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
3274 tail
= XVECTOR (obarray
)->contents
[i
];
3279 if (XSYMBOL (tail
)->next
== 0)
3281 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
3287 mapatoms_1 (sym
, function
)
3288 Lisp_Object sym
, function
;
3290 call1 (function
, sym
);
3293 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
3294 doc
: /* Call FUNCTION on every symbol in OBARRAY.
3295 OBARRAY defaults to the value of `obarray'. */)
3297 Lisp_Object function
, obarray
;
3299 if (NILP (obarray
)) obarray
= Vobarray
;
3300 obarray
= check_obarray (obarray
);
3302 map_obarray (obarray
, mapatoms_1
, function
);
3306 #define OBARRAY_SIZE 1511
3311 Lisp_Object oblength
;
3315 XSETFASTINT (oblength
, OBARRAY_SIZE
);
3317 Qnil
= Fmake_symbol (make_pure_string ("nil", 3, 3, 0));
3318 Vobarray
= Fmake_vector (oblength
, make_number (0));
3319 initial_obarray
= Vobarray
;
3320 staticpro (&initial_obarray
);
3321 /* Intern nil in the obarray */
3322 XSYMBOL (Qnil
)->interned
= SYMBOL_INTERNED_IN_INITIAL_OBARRAY
;
3323 XSYMBOL (Qnil
)->constant
= 1;
3325 /* These locals are to kludge around a pyramid compiler bug. */
3326 hash
= hash_string ("nil", 3);
3327 /* Separate statement here to avoid VAXC bug. */
3328 hash
%= OBARRAY_SIZE
;
3329 tem
= &XVECTOR (Vobarray
)->contents
[hash
];
3332 Qunbound
= Fmake_symbol (make_pure_string ("unbound", 7, 7, 0));
3333 XSYMBOL (Qnil
)->function
= Qunbound
;
3334 XSYMBOL (Qunbound
)->value
= Qunbound
;
3335 XSYMBOL (Qunbound
)->function
= Qunbound
;
3338 XSYMBOL (Qnil
)->value
= Qnil
;
3339 XSYMBOL (Qnil
)->plist
= Qnil
;
3340 XSYMBOL (Qt
)->value
= Qt
;
3341 XSYMBOL (Qt
)->constant
= 1;
3343 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
3346 Qvariable_documentation
= intern ("variable-documentation");
3347 staticpro (&Qvariable_documentation
);
3349 read_buffer_size
= 100 + MAX_MULTIBYTE_LENGTH
;
3350 read_buffer
= (char *) xmalloc (read_buffer_size
);
3355 struct Lisp_Subr
*sname
;
3358 sym
= intern (sname
->symbol_name
);
3359 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3362 #ifdef NOTDEF /* use fset in subr.el now */
3364 defalias (sname
, string
)
3365 struct Lisp_Subr
*sname
;
3369 sym
= intern (string
);
3370 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
3374 /* Define an "integer variable"; a symbol whose value is forwarded
3375 to a C variable of type int. Sample call: */
3376 /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */
3378 defvar_int (namestring
, address
)
3382 Lisp_Object sym
, val
;
3383 sym
= intern (namestring
);
3384 val
= allocate_misc ();
3385 XMISCTYPE (val
) = Lisp_Misc_Intfwd
;
3386 XINTFWD (val
)->intvar
= address
;
3387 SET_SYMBOL_VALUE (sym
, val
);
3390 /* Similar but define a variable whose value is t if address contains 1,
3391 nil if address contains 0 */
3393 defvar_bool (namestring
, address
)
3397 Lisp_Object sym
, val
;
3398 sym
= intern (namestring
);
3399 val
= allocate_misc ();
3400 XMISCTYPE (val
) = Lisp_Misc_Boolfwd
;
3401 XBOOLFWD (val
)->boolvar
= address
;
3402 SET_SYMBOL_VALUE (sym
, val
);
3403 Vbyte_boolean_vars
= Fcons (sym
, Vbyte_boolean_vars
);
3406 /* Similar but define a variable whose value is the Lisp Object stored
3407 at address. Two versions: with and without gc-marking of the C
3408 variable. The nopro version is used when that variable will be
3409 gc-marked for some other reason, since marking the same slot twice
3410 can cause trouble with strings. */
3412 defvar_lisp_nopro (namestring
, address
)
3414 Lisp_Object
*address
;
3416 Lisp_Object sym
, val
;
3417 sym
= intern (namestring
);
3418 val
= allocate_misc ();
3419 XMISCTYPE (val
) = Lisp_Misc_Objfwd
;
3420 XOBJFWD (val
)->objvar
= address
;
3421 SET_SYMBOL_VALUE (sym
, val
);
3425 defvar_lisp (namestring
, address
)
3427 Lisp_Object
*address
;
3429 defvar_lisp_nopro (namestring
, address
);
3430 staticpro (address
);
3433 /* Similar but define a variable whose value is the Lisp Object stored in
3434 the current buffer. address is the address of the slot in the buffer
3435 that is current now. */
3438 defvar_per_buffer (namestring
, address
, type
, doc
)
3440 Lisp_Object
*address
;
3444 Lisp_Object sym
, val
;
3446 extern struct buffer buffer_local_symbols
;
3448 sym
= intern (namestring
);
3449 val
= allocate_misc ();
3450 offset
= (char *)address
- (char *)current_buffer
;
3452 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
3453 XBUFFER_OBJFWD (val
)->offset
= offset
;
3454 SET_SYMBOL_VALUE (sym
, val
);
3455 PER_BUFFER_SYMBOL (offset
) = sym
;
3456 PER_BUFFER_TYPE (offset
) = type
;
3458 if (PER_BUFFER_IDX (offset
) == 0)
3459 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
3460 slot of buffer_local_flags */
3465 /* Similar but define a variable whose value is the Lisp Object stored
3466 at a particular offset in the current kboard object. */
3469 defvar_kboard (namestring
, offset
)
3473 Lisp_Object sym
, val
;
3474 sym
= intern (namestring
);
3475 val
= allocate_misc ();
3476 XMISCTYPE (val
) = Lisp_Misc_Kboard_Objfwd
;
3477 XKBOARD_OBJFWD (val
)->offset
= offset
;
3478 SET_SYMBOL_VALUE (sym
, val
);
3481 /* Record the value of load-path used at the start of dumping
3482 so we can see if the site changed it later during dumping. */
3483 static Lisp_Object dump_path
;
3489 int turn_off_warning
= 0;
3491 /* Compute the default load-path. */
3493 normal
= PATH_LOADSEARCH
;
3494 Vload_path
= decode_env_path (0, normal
);
3496 if (NILP (Vpurify_flag
))
3497 normal
= PATH_LOADSEARCH
;
3499 normal
= PATH_DUMPLOADSEARCH
;
3501 /* In a dumped Emacs, we normally have to reset the value of
3502 Vload_path from PATH_LOADSEARCH, since the value that was dumped
3503 uses ../lisp, instead of the path of the installed elisp
3504 libraries. However, if it appears that Vload_path was changed
3505 from the default before dumping, don't override that value. */
3508 if (! NILP (Fequal (dump_path
, Vload_path
)))
3510 Vload_path
= decode_env_path (0, normal
);
3511 if (!NILP (Vinstallation_directory
))
3513 Lisp_Object tem
, tem1
, sitelisp
;
3515 /* Remove site-lisp dirs from path temporarily and store
3516 them in sitelisp, then conc them on at the end so
3517 they're always first in path. */
3521 tem
= Fcar (Vload_path
);
3522 tem1
= Fstring_match (build_string ("site-lisp"),
3526 Vload_path
= Fcdr (Vload_path
);
3527 sitelisp
= Fcons (tem
, sitelisp
);
3533 /* Add to the path the lisp subdir of the
3534 installation dir, if it exists. */
3535 tem
= Fexpand_file_name (build_string ("lisp"),
3536 Vinstallation_directory
);
3537 tem1
= Ffile_exists_p (tem
);
3540 if (NILP (Fmember (tem
, Vload_path
)))
3542 turn_off_warning
= 1;
3543 Vload_path
= Fcons (tem
, Vload_path
);
3547 /* That dir doesn't exist, so add the build-time
3548 Lisp dirs instead. */
3549 Vload_path
= nconc2 (Vload_path
, dump_path
);
3551 /* Add leim under the installation dir, if it exists. */
3552 tem
= Fexpand_file_name (build_string ("leim"),
3553 Vinstallation_directory
);
3554 tem1
= Ffile_exists_p (tem
);
3557 if (NILP (Fmember (tem
, Vload_path
)))
3558 Vload_path
= Fcons (tem
, Vload_path
);
3561 /* Add site-list under the installation dir, if it exists. */
3562 tem
= Fexpand_file_name (build_string ("site-lisp"),
3563 Vinstallation_directory
);
3564 tem1
= Ffile_exists_p (tem
);
3567 if (NILP (Fmember (tem
, Vload_path
)))
3568 Vload_path
= Fcons (tem
, Vload_path
);
3571 /* If Emacs was not built in the source directory,
3572 and it is run from where it was built, add to load-path
3573 the lisp, leim and site-lisp dirs under that directory. */
3575 if (NILP (Fequal (Vinstallation_directory
, Vsource_directory
)))
3579 tem
= Fexpand_file_name (build_string ("src/Makefile"),
3580 Vinstallation_directory
);
3581 tem1
= Ffile_exists_p (tem
);
3583 /* Don't be fooled if they moved the entire source tree
3584 AFTER dumping Emacs. If the build directory is indeed
3585 different from the source dir, src/Makefile.in and
3586 src/Makefile will not be found together. */
3587 tem
= Fexpand_file_name (build_string ("src/Makefile.in"),
3588 Vinstallation_directory
);
3589 tem2
= Ffile_exists_p (tem
);
3590 if (!NILP (tem1
) && NILP (tem2
))
3592 tem
= Fexpand_file_name (build_string ("lisp"),
3595 if (NILP (Fmember (tem
, Vload_path
)))
3596 Vload_path
= Fcons (tem
, Vload_path
);
3598 tem
= Fexpand_file_name (build_string ("leim"),
3601 if (NILP (Fmember (tem
, Vload_path
)))
3602 Vload_path
= Fcons (tem
, Vload_path
);
3604 tem
= Fexpand_file_name (build_string ("site-lisp"),
3607 if (NILP (Fmember (tem
, Vload_path
)))
3608 Vload_path
= Fcons (tem
, Vload_path
);
3611 if (!NILP (sitelisp
))
3612 Vload_path
= nconc2 (Fnreverse (sitelisp
), Vload_path
);
3618 /* NORMAL refers to the lisp dir in the source directory. */
3619 /* We used to add ../lisp at the front here, but
3620 that caused trouble because it was copied from dump_path
3621 into Vload_path, aboe, when Vinstallation_directory was non-nil.
3622 It should be unnecessary. */
3623 Vload_path
= decode_env_path (0, normal
);
3624 dump_path
= Vload_path
;
3629 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
3630 almost never correct, thereby causing a warning to be printed out that
3631 confuses users. Since PATH_LOADSEARCH is always overridden by the
3632 EMACSLOADPATH environment variable below, disable the warning on NT. */
3634 /* Warn if dirs in the *standard* path don't exist. */
3635 if (!turn_off_warning
)
3637 Lisp_Object path_tail
;
3639 for (path_tail
= Vload_path
;
3641 path_tail
= XCDR (path_tail
))
3643 Lisp_Object dirfile
;
3644 dirfile
= Fcar (path_tail
);
3645 if (STRINGP (dirfile
))
3647 dirfile
= Fdirectory_file_name (dirfile
);
3648 if (access (SDATA (dirfile
), 0) < 0)
3649 dir_warning ("Warning: Lisp directory `%s' does not exist.\n",
3654 #endif /* WINDOWSNT */
3656 /* If the EMACSLOADPATH environment variable is set, use its value.
3657 This doesn't apply if we're dumping. */
3659 if (NILP (Vpurify_flag
)
3660 && egetenv ("EMACSLOADPATH"))
3662 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
3666 load_in_progress
= 0;
3667 Vload_file_name
= Qnil
;
3669 load_descriptor_list
= Qnil
;
3671 Vstandard_input
= Qt
;
3672 Vloads_in_progress
= Qnil
;
3675 /* Print a warning, using format string FORMAT, that directory DIRNAME
3676 does not exist. Print it on stderr and put it in *Message*. */
3679 dir_warning (format
, dirname
)
3681 Lisp_Object dirname
;
3684 = (char *) alloca (SCHARS (dirname
) + strlen (format
) + 5);
3686 fprintf (stderr
, format
, SDATA (dirname
));
3687 sprintf (buffer
, format
, SDATA (dirname
));
3688 /* Don't log the warning before we've initialized!! */
3690 message_dolog (buffer
, strlen (buffer
), 0, STRING_MULTIBYTE (dirname
));
3697 defsubr (&Sread_from_string
);
3699 defsubr (&Sintern_soft
);
3700 defsubr (&Sunintern
);
3702 defsubr (&Seval_buffer
);
3703 defsubr (&Seval_region
);
3704 defsubr (&Sread_char
);
3705 defsubr (&Sread_char_exclusive
);
3706 defsubr (&Sread_event
);
3707 defsubr (&Sget_file_char
);
3708 defsubr (&Smapatoms
);
3709 defsubr (&Slocate_file_internal
);
3711 DEFVAR_LISP ("obarray", &Vobarray
,
3712 doc
: /* Symbol table for use by `intern' and `read'.
3713 It is a vector whose length ought to be prime for best results.
3714 The vector's contents don't make sense if examined from Lisp programs;
3715 to find all the symbols in an obarray, use `mapatoms'. */);
3717 DEFVAR_LISP ("values", &Vvalues
,
3718 doc
: /* List of values of all expressions which were read, evaluated and printed.
3719 Order is reverse chronological. */);
3721 DEFVAR_LISP ("standard-input", &Vstandard_input
,
3722 doc
: /* Stream for read to get input from.
3723 See documentation of `read' for possible values. */);
3724 Vstandard_input
= Qt
;
3726 DEFVAR_LISP ("read-with-symbol-positions", &Vread_with_symbol_positions
,
3727 doc
: /* If non-nil, add position of read symbols to `read-symbol-positions-list'.
3729 If this variable is a buffer, then only forms read from that buffer
3730 will be added to `read-symbol-positions-list'.
3731 If this variable is t, then all read forms will be added.
3732 The effect of all other values other than nil are not currently
3733 defined, although they may be in the future.
3735 The positions are relative to the last call to `read' or
3736 `read-from-string'. It is probably a bad idea to set this variable at
3737 the toplevel; bind it instead. */);
3738 Vread_with_symbol_positions
= Qnil
;
3740 DEFVAR_LISP ("read-symbol-positions-list", &Vread_symbol_positions_list
,
3741 doc
: /* A list mapping read symbols to their positions.
3742 This variable is modified during calls to `read' or
3743 `read-from-string', but only when `read-with-symbol-positions' is
3746 Each element of the list looks like (SYMBOL . CHAR-POSITION), where
3747 CHAR-POSITION is an integer giving the offset of that occurrence of the
3748 symbol from the position where `read' or `read-from-string' started.
3750 Note that a symbol will appear multiple times in this list, if it was
3751 read multiple times. The list is in the same order as the symbols
3753 Vread_symbol_positions_list
= Qnil
;
3755 DEFVAR_LISP ("load-path", &Vload_path
,
3756 doc
: /* *List of directories to search for files to load.
3757 Each element is a string (directory name) or nil (try default directory).
3758 Initialized based on EMACSLOADPATH environment variable, if any,
3759 otherwise to default specified by file `epaths.h' when Emacs was built. */);
3761 DEFVAR_LISP ("load-suffixes", &Vload_suffixes
,
3762 doc
: /* *List of suffixes to try for files to load.
3763 This list should not include the empty string. */);
3764 Vload_suffixes
= Fcons (build_string (".elc"),
3765 Fcons (build_string (".el"), Qnil
));
3766 /* We don't use empty_string because it's not initialized yet. */
3767 default_suffixes
= Fcons (build_string (""), Qnil
);
3768 staticpro (&default_suffixes
);
3770 DEFVAR_BOOL ("load-in-progress", &load_in_progress
,
3771 doc
: /* Non-nil iff inside of `load'. */);
3773 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist
,
3774 doc
: /* An alist of expressions to be evalled when particular files are loaded.
3775 Each element looks like (FILENAME FORMS...).
3776 When `load' is run and the file-name argument is FILENAME,
3777 the FORMS in the corresponding element are executed at the end of loading.
3779 FILENAME must match exactly! Normally FILENAME is the name of a library,
3780 with no directory specified, since that is how `load' is normally called.
3781 An error in FORMS does not undo the load,
3782 but does prevent execution of the rest of the FORMS.
3783 FILENAME can also be a symbol (a feature) and FORMS are then executed
3784 when the corresponding call to `provide' is made. */);
3785 Vafter_load_alist
= Qnil
;
3787 DEFVAR_LISP ("load-history", &Vload_history
,
3788 doc
: /* Alist mapping source file names to symbols and features.
3789 Each alist element is a list that starts with a file name,
3790 except for one element (optional) that starts with nil and describes
3791 definitions evaluated from buffers not visiting files.
3792 The remaining elements of each list are symbols defined as functions,
3793 and cons cells of the form `(provide . FEATURE)', `(require . FEATURE)',
3794 `(defvar . VARIABLE), `(autoload . SYMBOL)', and `(t . SYMBOL)'.
3795 An element `(t . SYMBOL)' precedes an entry that is just SYMBOL,
3796 and means that SYMBOL was an autoload before this file redefined it
3798 Vload_history
= Qnil
;
3800 DEFVAR_LISP ("load-file-name", &Vload_file_name
,
3801 doc
: /* Full name of file being loaded by `load'. */);
3802 Vload_file_name
= Qnil
;
3804 DEFVAR_LISP ("user-init-file", &Vuser_init_file
,
3805 doc
: /* File name, including directory, of user's initialization file.
3806 If the file loaded had extension `.elc' and there was a corresponding `.el'
3807 file, this variable contains the name of the .el file, suitable for use
3808 by functions like `custom-save-all' which edit the init file. */);
3809 Vuser_init_file
= Qnil
;
3811 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list
,
3812 doc
: /* Used for internal purposes by `load'. */);
3813 Vcurrent_load_list
= Qnil
;
3815 DEFVAR_LISP ("load-read-function", &Vload_read_function
,
3816 doc
: /* Function used by `load' and `eval-region' for reading expressions.
3817 The default is nil, which means use the function `read'. */);
3818 Vload_read_function
= Qnil
;
3820 DEFVAR_LISP ("load-source-file-function", &Vload_source_file_function
,
3821 doc
: /* Function called in `load' for loading an Emacs lisp source file.
3822 This function is for doing code conversion before reading the source file.
3823 If nil, loading is done without any code conversion.
3824 Arguments are FULLNAME, FILE, NOERROR, NOMESSAGE, where
3825 FULLNAME is the full name of FILE.
3826 See `load' for the meaning of the remaining arguments. */);
3827 Vload_source_file_function
= Qnil
;
3829 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings
,
3830 doc
: /* Non-nil means `load' should force-load all dynamic doc strings.
3831 This is useful when the file being loaded is a temporary copy. */);
3832 load_force_doc_strings
= 0;
3834 DEFVAR_BOOL ("load-convert-to-unibyte", &load_convert_to_unibyte
,
3835 doc
: /* Non-nil means `read' converts strings to unibyte whenever possible.
3836 This is normally bound by `load' and `eval-buffer' to control `read',
3837 and is not meant for users to change. */);
3838 load_convert_to_unibyte
= 0;
3840 DEFVAR_LISP ("source-directory", &Vsource_directory
,
3841 doc
: /* Directory in which Emacs sources were found when Emacs was built.
3842 You cannot count on them to still be there! */);
3844 = Fexpand_file_name (build_string ("../"),
3845 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
3847 DEFVAR_LISP ("preloaded-file-list", &Vpreloaded_file_list
,
3848 doc
: /* List of files that were preloaded (when dumping Emacs). */);
3849 Vpreloaded_file_list
= Qnil
;
3851 DEFVAR_LISP ("byte-boolean-vars", &Vbyte_boolean_vars
,
3852 doc
: /* List of all DEFVAR_BOOL variables, used by the byte code optimizer. */);
3853 Vbyte_boolean_vars
= Qnil
;
3855 DEFVAR_BOOL ("load-dangerous-libraries", &load_dangerous_libraries
,
3856 doc
: /* Non-nil means load dangerous compiled Lisp files.
3857 Some versions of XEmacs use different byte codes than Emacs. These
3858 incompatible byte codes can make Emacs crash when it tries to execute
3860 load_dangerous_libraries
= 0;
3862 DEFVAR_LISP ("bytecomp-version-regexp", &Vbytecomp_version_regexp
,
3863 doc
: /* Regular expression matching safe to load compiled Lisp files.
3864 When Emacs loads a compiled Lisp file, it reads the first 512 bytes
3865 from the file, and matches them against this regular expression.
3866 When the regular expression matches, the file is considered to be safe
3867 to load. See also `load-dangerous-libraries'. */);
3868 Vbytecomp_version_regexp
3869 = build_string ("^;;;.\\(in Emacs version\\|bytecomp version FSF\\)");
3871 /* Vsource_directory was initialized in init_lread. */
3873 load_descriptor_list
= Qnil
;
3874 staticpro (&load_descriptor_list
);
3876 Qcurrent_load_list
= intern ("current-load-list");
3877 staticpro (&Qcurrent_load_list
);
3879 Qstandard_input
= intern ("standard-input");
3880 staticpro (&Qstandard_input
);
3882 Qread_char
= intern ("read-char");
3883 staticpro (&Qread_char
);
3885 Qget_file_char
= intern ("get-file-char");
3886 staticpro (&Qget_file_char
);
3888 Qbackquote
= intern ("`");
3889 staticpro (&Qbackquote
);
3890 Qcomma
= intern (",");
3891 staticpro (&Qcomma
);
3892 Qcomma_at
= intern (",@");
3893 staticpro (&Qcomma_at
);
3894 Qcomma_dot
= intern (",.");
3895 staticpro (&Qcomma_dot
);
3897 Qinhibit_file_name_operation
= intern ("inhibit-file-name-operation");
3898 staticpro (&Qinhibit_file_name_operation
);
3900 Qascii_character
= intern ("ascii-character");
3901 staticpro (&Qascii_character
);
3903 Qfunction
= intern ("function");
3904 staticpro (&Qfunction
);
3906 Qload
= intern ("load");
3909 Qload_file_name
= intern ("load-file-name");
3910 staticpro (&Qload_file_name
);
3912 staticpro (&dump_path
);
3914 staticpro (&read_objects
);
3915 read_objects
= Qnil
;
3916 staticpro (&seen_list
);
3918 Vloads_in_progress
= Qnil
;
3919 staticpro (&Vloads_in_progress
);