1 /* Lisp parsing and input streams.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989,
3 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include <sys/types.h>
35 #include "termhooks.h"
39 #include <sys/inode.h>
46 #ifdef LISP_FLOAT_TYPE
53 /* These are redefined (correctly, but differently) in values.h. */
60 #endif /* LISP_FLOAT_TYPE */
68 Lisp_Object Qread_char
, Qget_file_char
, Qstandard_input
, Qcurrent_load_list
;
69 Lisp_Object Qvariable_documentation
, Vvalues
, Vstandard_input
, Vafter_load_alist
;
70 Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
71 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
;
73 extern Lisp_Object Qevent_symbol_element_mask
;
75 /* non-zero if inside `load' */
78 /* Search path for files to be loaded. */
79 Lisp_Object Vload_path
;
81 /* This is the user-visible association list that maps features to
82 lists of defs in their load files. */
83 Lisp_Object Vload_history
;
85 /* This is used to build the load history. */
86 Lisp_Object Vcurrent_load_list
;
88 /* Name of file actually being read by `load'. */
89 Lisp_Object Vload_file_name
;
91 /* Function to use for reading, in `load' and friends. */
92 Lisp_Object Vload_read_function
;
94 /* Nonzero means load should forcibly load all dynamic doc strings. */
95 static int load_force_doc_strings
;
97 /* List of descriptors now open for Fload. */
98 static Lisp_Object load_descriptor_list
;
100 /* File for get_file_char to read from. Use by load. */
101 static FILE *instream
;
103 /* When nonzero, read conses in pure space */
104 static int read_pure
;
106 /* For use within read-from-string (this reader is non-reentrant!!) */
107 static int read_from_string_index
;
108 static int read_from_string_limit
;
110 /* This contains the last string skipped with #@. */
111 static char *saved_doc_string
;
112 /* Length of buffer allocated in saved_doc_string. */
113 static int saved_doc_string_size
;
114 /* Length of actual data in saved_doc_string. */
115 static int saved_doc_string_length
;
116 /* This is the file position that string came from. */
117 static int saved_doc_string_position
;
119 /* Nonzero means inside a new-style backquote
120 with no surrounding parentheses.
121 Fread initializes this to zero, so we need not specbind it
122 or worry about what happens to it when there is an error. */
123 static int new_backquote_flag
;
125 /* Handle unreading and rereading of characters.
126 Write READCHAR to read a character,
127 UNREAD(c) to unread c to be read again. */
129 #define READCHAR readchar (readcharfun)
130 #define UNREAD(c) unreadchar (readcharfun, c)
133 readchar (readcharfun
)
134 Lisp_Object readcharfun
;
137 register struct buffer
*inbuffer
;
138 register int c
, mpos
;
140 if (BUFFERP (readcharfun
))
142 inbuffer
= XBUFFER (readcharfun
);
144 if (BUF_PT (inbuffer
) >= BUF_ZV (inbuffer
))
146 c
= *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer
, BUF_PT (inbuffer
));
147 SET_BUF_PT (inbuffer
, BUF_PT (inbuffer
) + 1);
151 if (MARKERP (readcharfun
))
153 inbuffer
= XMARKER (readcharfun
)->buffer
;
155 mpos
= marker_position (readcharfun
);
157 if (mpos
> BUF_ZV (inbuffer
) - 1)
159 c
= *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer
, mpos
);
160 if (mpos
!= BUF_GPT (inbuffer
))
161 XMARKER (readcharfun
)->bufpos
++;
163 Fset_marker (readcharfun
, make_number (mpos
+ 1),
164 Fmarker_buffer (readcharfun
));
167 if (EQ (readcharfun
, Qget_file_char
))
171 /* Interrupted reads have been observed while reading over the network */
172 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
181 if (STRINGP (readcharfun
))
184 /* This used to be return of a conditional expression,
185 but that truncated -1 to a char on VMS. */
186 if (read_from_string_index
< read_from_string_limit
)
187 c
= XSTRING (readcharfun
)->data
[read_from_string_index
++];
193 tem
= call0 (readcharfun
);
200 /* Unread the character C in the way appropriate for the stream READCHARFUN.
201 If the stream is a user function, call it with the char as argument. */
204 unreadchar (readcharfun
, c
)
205 Lisp_Object readcharfun
;
209 /* Don't back up the pointer if we're unreading the end-of-input mark,
210 since readchar didn't advance it when we read it. */
212 else if (BUFFERP (readcharfun
))
214 if (XBUFFER (readcharfun
) == current_buffer
)
217 SET_BUF_PT (XBUFFER (readcharfun
), BUF_PT (XBUFFER (readcharfun
)) - 1);
219 else if (MARKERP (readcharfun
))
220 XMARKER (readcharfun
)->bufpos
--;
221 else if (STRINGP (readcharfun
))
222 read_from_string_index
--;
223 else if (EQ (readcharfun
, Qget_file_char
))
224 ungetc (c
, instream
);
226 call1 (readcharfun
, make_number (c
));
229 static Lisp_Object
read0 (), read1 (), read_list (), read_vector ();
231 /* get a character from the tty */
233 extern Lisp_Object
read_char ();
235 /* Read input events until we get one that's acceptable for our purposes.
237 If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed
238 until we get a character we like, and then stuffed into
241 If ASCII_REQUIRED is non-zero, we check function key events to see
242 if the unmodified version of the symbol has a Qascii_character
243 property, and use that character, if present.
245 If ERROR_NONASCII is non-zero, we signal an error if the input we
246 get isn't an ASCII character with modifiers. If it's zero but
247 ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII
250 read_filtered_event (no_switch_frame
, ascii_required
, error_nonascii
)
251 int no_switch_frame
, ascii_required
, error_nonascii
;
254 return make_number (getchar ());
256 register Lisp_Object val
, delayed_switch_frame
;
258 delayed_switch_frame
= Qnil
;
260 /* Read until we get an acceptable event. */
262 val
= read_char (0, 0, 0, Qnil
, 0);
267 /* switch-frame events are put off until after the next ASCII
268 character. This is better than signalling an error just because
269 the last characters were typed to a separate minibuffer frame,
270 for example. Eventually, some code which can deal with
271 switch-frame events will read it and process it. */
273 && EVENT_HAS_PARAMETERS (val
)
274 && EQ (EVENT_HEAD (val
), Qswitch_frame
))
276 delayed_switch_frame
= val
;
282 /* Convert certain symbols to their ASCII equivalents. */
285 Lisp_Object tem
, tem1
, tem2
;
286 tem
= Fget (val
, Qevent_symbol_element_mask
);
289 tem1
= Fget (Fcar (tem
), Qascii_character
);
290 /* Merge this symbol's modifier bits
291 with the ASCII equivalent of its basic code. */
293 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
297 /* If we don't have a character now, deal with it appropriately. */
302 Vunread_command_events
= Fcons (val
, Qnil
);
303 error ("Non-character input-event");
310 if (! NILP (delayed_switch_frame
))
311 unread_switch_frame
= delayed_switch_frame
;
317 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 0, 0,
318 "Read a character from the command input (keyboard or macro).\n\
319 It is returned as a number.\n\
320 If the user generates an event which is not a character (i.e. a mouse\n\
321 click or function key event), `read-char' signals an error. As an\n\
322 exception, switch-frame events are put off until non-ASCII events can\n\
324 If you want to read non-character events, or ignore them, call\n\
325 `read-event' or `read-char-exclusive' instead.")
328 return read_filtered_event (1, 1, 1);
331 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 0, 0,
332 "Read an event object from the input stream.")
335 return read_filtered_event (0, 0, 0);
338 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 0, 0,
339 "Read a character from the command input (keyboard or macro).\n\
340 It is returned as a number. Non character events are ignored.")
343 return read_filtered_event (1, 1, 0);
346 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
347 "Don't use this yourself.")
350 register Lisp_Object val
;
351 XSETINT (val
, getc (instream
));
355 static void readevalloop ();
356 static Lisp_Object
load_unwind ();
357 static Lisp_Object
load_descriptor_unwind ();
359 DEFUN ("load", Fload
, Sload
, 1, 4, 0,
360 "Execute a file of Lisp code named FILE.\n\
361 First try FILE with `.elc' appended, then try with `.el',\n\
362 then try FILE unmodified.\n\
363 This function searches the directories in `load-path'.\n\
364 If optional second arg NOERROR is non-nil,\n\
365 report no error if FILE doesn't exist.\n\
366 Print messages at start and end of loading unless\n\
367 optional third arg NOMESSAGE is non-nil.\n\
368 If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\
369 suffixes `.elc' or `.el' to the specified name FILE.\n\
370 Return t if file exists.")
371 (file
, noerror
, nomessage
, nosuffix
)
372 Lisp_Object file
, noerror
, nomessage
, nosuffix
;
374 register FILE *stream
;
375 register int fd
= -1;
376 register Lisp_Object lispstream
;
377 int count
= specpdl_ptr
- specpdl
;
381 /* 1 means inhibit the message at the beginning. */
385 char *dosmode
= "rt";
388 CHECK_STRING (file
, 0);
390 /* If file name is magic, call the handler. */
391 handler
= Ffind_file_name_handler (file
, Qload
);
393 return call5 (handler
, Qload
, file
, noerror
, nomessage
, nosuffix
);
395 /* Do this after the handler to avoid
396 the need to gcpro noerror, nomessage and nosuffix.
397 (Below here, we care only whether they are nil or not.) */
398 file
= Fsubstitute_in_file_name (file
);
400 /* Avoid weird lossage with null string as arg,
401 since it would try to load a directory as a Lisp file */
402 if (XSTRING (file
)->size
> 0)
405 fd
= openp (Vload_path
, file
, !NILP (nosuffix
) ? "" : ".elc:.el:",
414 Fsignal (Qfile_error
, Fcons (build_string ("Cannot open load file"),
415 Fcons (file
, Qnil
)));
420 if (!bcmp (&(XSTRING (found
)->data
[XSTRING (found
)->size
- 4]),
429 stat ((char *)XSTRING (found
)->data
, &s1
);
430 XSTRING (found
)->data
[XSTRING (found
)->size
- 1] = 0;
431 result
= stat ((char *)XSTRING (found
)->data
, &s2
);
432 if (result
>= 0 && (unsigned) s1
.st_mtime
< (unsigned) s2
.st_mtime
)
434 message ("Source file `%s' newer than byte-compiled file",
435 XSTRING (found
)->data
);
436 /* Don't immediately overwrite this message. */
440 XSTRING (found
)->data
[XSTRING (found
)->size
- 1] = 'c';
445 stream
= fopen ((char *) XSTRING (found
)->data
, dosmode
);
446 #else /* not DOS_NT */
447 stream
= fdopen (fd
, "r");
448 #endif /* not DOS_NT */
452 error ("Failure to create stdio stream for %s", XSTRING (file
)->data
);
455 if (NILP (nomessage
) && !nomessage1
)
456 message ("Loading %s...", XSTRING (file
)->data
);
459 lispstream
= Fcons (Qnil
, Qnil
);
460 XSETFASTINT (XCONS (lispstream
)->car
, (EMACS_UINT
)stream
>> 16);
461 XSETFASTINT (XCONS (lispstream
)->cdr
, (EMACS_UINT
)stream
& 0xffff);
462 record_unwind_protect (load_unwind
, lispstream
);
463 record_unwind_protect (load_descriptor_unwind
, load_descriptor_list
);
464 specbind (Qload_file_name
, found
);
466 = Fcons (make_number (fileno (stream
)), load_descriptor_list
);
468 readevalloop (Qget_file_char
, stream
, file
, Feval
, 0);
469 unbind_to (count
, Qnil
);
471 /* Run any load-hooks for this file. */
472 temp
= Fassoc (file
, Vafter_load_alist
);
474 Fprogn (Fcdr (temp
));
477 if (saved_doc_string
)
478 free (saved_doc_string
);
479 saved_doc_string
= 0;
480 saved_doc_string_size
= 0;
482 if (!noninteractive
&& NILP (nomessage
))
483 message ("Loading %s...done", XSTRING (file
)->data
);
488 load_unwind (stream
) /* used as unwind-protect function in load */
491 fclose ((FILE *) (XFASTINT (XCONS (stream
)->car
) << 16
492 | XFASTINT (XCONS (stream
)->cdr
)));
493 if (--load_in_progress
< 0) load_in_progress
= 0;
498 load_descriptor_unwind (oldlist
)
501 load_descriptor_list
= oldlist
;
505 /* Close all descriptors in use for Floads.
506 This is used when starting a subprocess. */
512 for (tail
= load_descriptor_list
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
513 close (XFASTINT (XCONS (tail
)->car
));
517 complete_filename_p (pathname
)
518 Lisp_Object pathname
;
520 register unsigned char *s
= XSTRING (pathname
)->data
;
521 return (IS_DIRECTORY_SEP (s
[0])
522 || (XSTRING (pathname
)->size
> 2
523 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2]))
533 /* Search for a file whose name is STR, looking in directories
534 in the Lisp list PATH, and trying suffixes from SUFFIX.
535 SUFFIX is a string containing possible suffixes separated by colons.
536 On success, returns a file descriptor. On failure, returns -1.
538 EXEC_ONLY nonzero means don't open the files,
539 just look for one that is executable. In this case,
540 returns 1 on success.
542 If STOREPTR is nonzero, it points to a slot where the name of
543 the file actually found should be stored as a Lisp string.
544 Nil is stored there on failure. */
547 openp (path
, str
, suffix
, storeptr
, exec_only
)
548 Lisp_Object path
, str
;
550 Lisp_Object
*storeptr
;
556 register char *fn
= buf
;
559 register Lisp_Object filename
;
567 if (complete_filename_p (str
))
570 for (; !NILP (path
); path
= Fcdr (path
))
574 filename
= Fexpand_file_name (str
, Fcar (path
));
575 if (!complete_filename_p (filename
))
576 /* If there are non-absolute elts in PATH (eg ".") */
577 /* Of course, this could conceivably lose if luser sets
578 default-directory to be something non-absolute... */
580 filename
= Fexpand_file_name (filename
, current_buffer
->directory
);
581 if (!complete_filename_p (filename
))
582 /* Give up on this path element! */
586 /* Calculate maximum size of any filename made from
587 this path element/specified file name and any possible suffix. */
588 want_size
= strlen (suffix
) + XSTRING (filename
)->size
+ 1;
589 if (fn_size
< want_size
)
590 fn
= (char *) alloca (fn_size
= 100 + want_size
);
594 /* Loop over suffixes. */
597 char *esuffix
= (char *) index (nsuffix
, ':');
598 int lsuffix
= esuffix
? esuffix
- nsuffix
: strlen (nsuffix
);
600 /* Concatenate path element/specified name with the suffix. */
601 strncpy (fn
, XSTRING (filename
)->data
, XSTRING (filename
)->size
);
602 fn
[XSTRING (filename
)->size
] = 0;
603 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
604 strncat (fn
, nsuffix
, lsuffix
);
606 /* Ignore file if it's a directory. */
607 if (stat (fn
, &st
) >= 0
608 && (st
.st_mode
& S_IFMT
) != S_IFDIR
)
610 /* Check that we can access or open it. */
612 fd
= (access (fn
, X_OK
) == 0) ? 1 : -1;
614 fd
= open (fn
, O_RDONLY
, 0);
618 /* We succeeded; return this descriptor and filename. */
620 *storeptr
= build_string (fn
);
626 /* Advance to next suffix. */
629 nsuffix
+= lsuffix
+ 1;
640 /* Merge the list we've accumulated of globals from the current input source
641 into the load_history variable. The details depend on whether
642 the source has an associated file name or not. */
645 build_load_history (stream
, source
)
649 register Lisp_Object tail
, prev
, newelt
;
650 register Lisp_Object tem
, tem2
;
651 register int foundit
, loading
;
653 /* Don't bother recording anything for preloaded files. */
654 if (!NILP (Vpurify_flag
))
657 loading
= stream
|| !NARROWED
;
659 tail
= Vload_history
;
666 /* Find the feature's previous assoc list... */
667 if (!NILP (Fequal (source
, Fcar (tem
))))
671 /* If we're loading, remove it. */
675 Vload_history
= Fcdr (tail
);
677 Fsetcdr (prev
, Fcdr (tail
));
680 /* Otherwise, cons on new symbols that are not already members. */
683 tem2
= Vcurrent_load_list
;
687 newelt
= Fcar (tem2
);
689 if (NILP (Fmemq (newelt
, tem
)))
690 Fsetcar (tail
, Fcons (Fcar (tem
),
691 Fcons (newelt
, Fcdr (tem
))));
704 /* If we're loading, cons the new assoc onto the front of load-history,
705 the most-recently-loaded position. Also do this if we didn't find
706 an existing member for the current source. */
707 if (loading
|| !foundit
)
708 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
713 unreadpure () /* Used as unwind-protect function in readevalloop */
720 readevalloop (readcharfun
, stream
, sourcename
, evalfun
, printflag
)
721 Lisp_Object readcharfun
;
723 Lisp_Object sourcename
;
724 Lisp_Object (*evalfun
) ();
728 register Lisp_Object val
;
729 int count
= specpdl_ptr
- specpdl
;
731 struct buffer
*b
= 0;
733 if (BUFFERP (readcharfun
))
734 b
= XBUFFER (readcharfun
);
735 else if (MARKERP (readcharfun
))
736 b
= XMARKER (readcharfun
)->buffer
;
738 specbind (Qstandard_input
, readcharfun
);
739 specbind (Qcurrent_load_list
, Qnil
);
743 LOADHIST_ATTACH (sourcename
);
747 if (b
!= 0 && NILP (b
->name
))
748 error ("Reading from killed buffer");
754 while ((c
= READCHAR
) != '\n' && c
!= -1);
759 /* Ignore whitespace here, so we can detect eof. */
760 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r')
763 if (!NILP (Vpurify_flag
) && c
== '(')
765 int count1
= specpdl_ptr
- specpdl
;
766 record_unwind_protect (unreadpure
, Qnil
);
767 val
= read_list (-1, readcharfun
);
768 unbind_to (count1
, Qnil
);
773 if (NILP (Vload_read_function
))
774 val
= read0 (readcharfun
);
776 val
= call1 (Vload_read_function
, readcharfun
);
779 val
= (*evalfun
) (val
);
782 Vvalues
= Fcons (val
, Vvalues
);
783 if (EQ (Vstandard_output
, Qt
))
790 build_load_history (stream
, sourcename
);
793 unbind_to (count
, Qnil
);
798 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 2, "",
799 "Execute the current buffer as Lisp code.\n\
800 Programs can pass two arguments, BUFFER and PRINTFLAG.\n\
801 BUFFER is the buffer to evaluate (nil means use current buffer).\n\
802 PRINTFLAG controls printing of output:\n\
803 nil means discard it; anything else is stream for print.\n\
805 If there is no error, point does not move. If there is an error,\n\
806 point remains at the end of the last character read from the buffer.")
808 Lisp_Object bufname
, printflag
;
810 int count
= specpdl_ptr
- specpdl
;
811 Lisp_Object tem
, buf
;
814 buf
= Fcurrent_buffer ();
816 buf
= Fget_buffer (bufname
);
818 error ("No such buffer.");
820 if (NILP (printflag
))
824 specbind (Qstandard_output
, tem
);
825 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
826 BUF_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
827 readevalloop (buf
, 0, XBUFFER (buf
)->filename
, Feval
, !NILP (printflag
));
828 unbind_to (count
, Qnil
);
834 DEFUN ("eval-current-buffer", Feval_current_buffer
, Seval_current_buffer
, 0, 1, "",
835 "Execute the current buffer as Lisp code.\n\
836 Programs can pass argument PRINTFLAG which controls printing of output:\n\
837 nil means discard it; anything else is stream for print.\n\
839 If there is no error, point does not move. If there is an error,\n\
840 point remains at the end of the last character read from the buffer.")
842 Lisp_Object printflag
;
844 int count
= specpdl_ptr
- specpdl
;
845 Lisp_Object tem
, cbuf
;
847 cbuf
= Fcurrent_buffer ()
849 if (NILP (printflag
))
853 specbind (Qstandard_output
, tem
);
854 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
856 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
, Feval
, !NILP (printflag
));
857 return unbind_to (count
, Qnil
);
861 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 3, "r",
862 "Execute the region as Lisp code.\n\
863 When called from programs, expects two arguments,\n\
864 giving starting and ending indices in the current buffer\n\
865 of the text to be executed.\n\
866 Programs can pass third argument PRINTFLAG which controls output:\n\
867 nil means discard it; anything else is stream for printing it.\n\
869 If there is no error, point does not move. If there is an error,\n\
870 point remains at the end of the last character read from the buffer.")
872 Lisp_Object b
, e
, printflag
;
874 int count
= specpdl_ptr
- specpdl
;
875 Lisp_Object tem
, cbuf
;
877 cbuf
= Fcurrent_buffer ();
879 if (NILP (printflag
))
883 specbind (Qstandard_output
, tem
);
885 if (NILP (printflag
))
886 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
887 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
889 /* This both uses b and checks its type. */
891 Fnarrow_to_region (make_number (BEGV
), e
);
892 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
, Feval
, !NILP (printflag
));
894 return unbind_to (count
, Qnil
);
897 #endif /* standalone */
899 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
900 "Read one Lisp expression as text from STREAM, return as Lisp object.\n\
901 If STREAM is nil, use the value of `standard-input' (which see).\n\
902 STREAM or the value of `standard-input' may be:\n\
903 a buffer (read from point and advance it)\n\
904 a marker (read from where it points and advance it)\n\
905 a function (call it with no arguments for each character,\n\
906 call it with a char as argument to push a char back)\n\
907 a string (takes text from string, starting at the beginning)\n\
908 t (read text line using minibuffer and use it).")
912 extern Lisp_Object
Fread_minibuffer ();
915 stream
= Vstandard_input
;
919 new_backquote_flag
= 0;
922 if (EQ (stream
, Qread_char
))
923 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
926 if (STRINGP (stream
))
927 return Fcar (Fread_from_string (stream
, Qnil
, Qnil
));
929 return read0 (stream
);
932 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
933 "Read one Lisp expression which is represented as text by STRING.\n\
934 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\
935 START and END optionally delimit a substring of STRING from which to read;\n\
936 they default to 0 and (length STRING) respectively.")
938 Lisp_Object string
, start
, end
;
940 int startval
, endval
;
943 CHECK_STRING (string
,0);
946 endval
= XSTRING (string
)->size
;
948 { CHECK_NUMBER (end
,2);
950 if (endval
< 0 || endval
> XSTRING (string
)->size
)
951 args_out_of_range (string
, end
);
957 { CHECK_NUMBER (start
,1);
958 startval
= XINT (start
);
959 if (startval
< 0 || startval
> endval
)
960 args_out_of_range (string
, start
);
963 read_from_string_index
= startval
;
964 read_from_string_limit
= endval
;
966 new_backquote_flag
= 0;
968 tem
= read0 (string
);
969 return Fcons (tem
, make_number (read_from_string_index
));
972 /* Use this for recursive reads, in contexts where internal tokens
976 Lisp_Object readcharfun
;
978 register Lisp_Object val
;
981 val
= read1 (readcharfun
, &c
, 0);
983 Fsignal (Qinvalid_read_syntax
, Fcons (make_string (&c
, 1), Qnil
));
988 static int read_buffer_size
;
989 static char *read_buffer
;
992 read_escape (readcharfun
)
993 Lisp_Object readcharfun
;
995 register int c
= READCHAR
;
1022 error ("Invalid escape character syntax");
1025 c
= read_escape (readcharfun
);
1026 return c
| meta_modifier
;
1031 error ("Invalid escape character syntax");
1034 c
= read_escape (readcharfun
);
1035 return c
| shift_modifier
;
1040 error ("Invalid escape character syntax");
1043 c
= read_escape (readcharfun
);
1044 return c
| hyper_modifier
;
1049 error ("Invalid escape character syntax");
1052 c
= read_escape (readcharfun
);
1053 return c
| alt_modifier
;
1058 error ("Invalid escape character syntax");
1061 c
= read_escape (readcharfun
);
1062 return c
| super_modifier
;
1067 error ("Invalid escape character syntax");
1071 c
= read_escape (readcharfun
);
1072 if ((c
& 0177) == '?')
1074 /* ASCII control chars are made from letters (both cases),
1075 as well as the non-letters within 0100...0137. */
1076 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
1077 return (c
& (037 | ~0177));
1078 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
1079 return (c
& (037 | ~0177));
1081 return c
| ctrl_modifier
;
1091 /* An octal escape, as in ANSI C. */
1093 register int i
= c
- '0';
1094 register int count
= 0;
1097 if ((c
= READCHAR
) >= '0' && c
<= '7')
1112 /* A hex escape, as in ANSI C. */
1118 if (c
>= '0' && c
<= '9')
1123 else if ((c
>= 'a' && c
<= 'f')
1124 || (c
>= 'A' && c
<= 'F'))
1127 if (c
>= 'a' && c
<= 'f')
1146 /* If the next token is ')' or ']' or '.', we store that character
1147 in *PCH and the return value is not interesting. Else, we store
1148 zero in *PCH and we read and return one lisp object.
1150 FIRST_IN_LIST is nonzero if this is the first element of a list. */
1153 read1 (readcharfun
, pch
, first_in_list
)
1154 register Lisp_Object readcharfun
;
1164 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1169 return read_list (0, readcharfun
);
1172 return read_vector (readcharfun
);
1185 /* Accept compiled functions at read-time so that we don't have to
1186 build them using function calls. */
1188 tmp
= read_vector (readcharfun
);
1189 return Fmake_byte_code (XVECTOR (tmp
)->size
,
1190 XVECTOR (tmp
)->contents
);
1192 #ifdef USE_TEXT_PROPERTIES
1196 struct gcpro gcpro1
;
1199 /* Read the string itself. */
1200 tmp
= read1 (readcharfun
, &ch
, 0);
1201 if (ch
!= 0 || !STRINGP (tmp
))
1202 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1204 /* Read the intervals and their properties. */
1207 Lisp_Object beg
, end
, plist
;
1209 beg
= read1 (readcharfun
, &ch
, 0);
1213 end
= read1 (readcharfun
, &ch
, 0);
1215 plist
= read1 (readcharfun
, &ch
, 0);
1217 Fsignal (Qinvalid_read_syntax
,
1218 Fcons (build_string ("invalid string property list"),
1220 Fset_text_properties (beg
, end
, plist
, tmp
);
1226 /* #@NUMBER is used to skip NUMBER following characters.
1227 That's used in .elc files to skip over doc strings
1228 and function definitions. */
1233 /* Read a decimal integer. */
1234 while ((c
= READCHAR
) >= 0
1235 && c
>= '0' && c
<= '9')
1243 #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */
1244 if (load_force_doc_strings
&& EQ (readcharfun
, Qget_file_char
))
1246 /* If we are supposed to force doc strings into core right now,
1247 record the last string that we skipped,
1248 and record where in the file it comes from. */
1249 if (saved_doc_string_size
== 0)
1251 saved_doc_string_size
= nskip
+ 100;
1252 saved_doc_string
= (char *) malloc (saved_doc_string_size
);
1254 if (nskip
> saved_doc_string_size
)
1256 saved_doc_string_size
= nskip
+ 100;
1257 saved_doc_string
= (char *) realloc (saved_doc_string
,
1258 saved_doc_string_size
);
1261 saved_doc_string_position
= ftell (instream
);
1263 /* Copy that many characters into saved_doc_string. */
1264 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1265 saved_doc_string
[i
] = c
= READCHAR
;
1267 saved_doc_string_length
= i
;
1270 #endif /* not DOS_NT */
1272 /* Skip that many characters. */
1273 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1279 return Vload_file_name
;
1282 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1285 while ((c
= READCHAR
) >= 0 && c
!= '\n');
1290 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
1300 new_backquote_flag
= 1;
1301 value
= read0 (readcharfun
);
1302 new_backquote_flag
= 0;
1304 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
1308 if (new_backquote_flag
)
1310 Lisp_Object comma_type
= Qnil
;
1315 comma_type
= Qcomma_at
;
1317 comma_type
= Qcomma_dot
;
1320 if (ch
>= 0) UNREAD (ch
);
1321 comma_type
= Qcomma
;
1324 new_backquote_flag
= 0;
1325 value
= read0 (readcharfun
);
1326 new_backquote_flag
= 1;
1327 return Fcons (comma_type
, Fcons (value
, Qnil
));
1334 register Lisp_Object val
;
1337 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1340 XSETINT (val
, read_escape (readcharfun
));
1349 register char *p
= read_buffer
;
1350 register char *end
= read_buffer
+ read_buffer_size
;
1354 while ((c
= READCHAR
) >= 0
1359 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1360 p
+= new - read_buffer
;
1361 read_buffer
+= new - read_buffer
;
1362 end
= read_buffer
+ read_buffer_size
;
1365 c
= read_escape (readcharfun
);
1366 /* c is -1 if \ newline has just been seen */
1369 if (p
== read_buffer
)
1374 /* Allow `\C- ' and `\C-?'. */
1375 if (c
== (CHAR_CTL
| ' '))
1377 else if (c
== (CHAR_CTL
| '?'))
1381 /* Move the meta bit to the right place for a string. */
1382 c
= (c
& ~CHAR_META
) | 0x80;
1384 error ("Invalid modifier in string");
1388 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1390 /* If purifying, and string starts with \ newline,
1391 return zero instead. This is for doc strings
1392 that we are really going to find in etc/DOC.nn.nn */
1393 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
1394 return make_number (0);
1397 return make_pure_string (read_buffer
, p
- read_buffer
);
1399 return make_string (read_buffer
, p
- read_buffer
);
1404 #ifdef LISP_FLOAT_TYPE
1405 /* If a period is followed by a number, then we should read it
1406 as a floating point number. Otherwise, it denotes a dotted
1408 int next_char
= READCHAR
;
1411 if (! (next_char
>= '0' && next_char
<= '9'))
1418 /* Otherwise, we fall through! Note that the atom-reading loop
1419 below will now loop at least once, assuring that we will not
1420 try to UNREAD two characters in a row. */
1424 if (c
<= 040) goto retry
;
1426 register char *p
= read_buffer
;
1430 register char *end
= read_buffer
+ read_buffer_size
;
1433 !(c
== '\"' || c
== '\'' || c
== ';' || c
== '?'
1434 || c
== '(' || c
== ')'
1435 #ifndef LISP_FLOAT_TYPE
1436 /* If we have floating-point support, then we need
1437 to allow <digits><dot><digits>. */
1439 #endif /* not LISP_FLOAT_TYPE */
1440 || c
== '[' || c
== ']' || c
== '#'
1445 register char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1446 p
+= new - read_buffer
;
1447 read_buffer
+= new - read_buffer
;
1448 end
= read_buffer
+ read_buffer_size
;
1461 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1462 p
+= new - read_buffer
;
1463 read_buffer
+= new - read_buffer
;
1464 /* end = read_buffer + read_buffer_size; */
1474 register Lisp_Object val
;
1476 if (*p1
== '+' || *p1
== '-') p1
++;
1477 /* Is it an integer? */
1480 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
1481 #ifdef LISP_FLOAT_TYPE
1482 /* Integers can have trailing decimal points. */
1483 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
1486 /* It is an integer. */
1488 #ifdef LISP_FLOAT_TYPE
1492 if (sizeof (int) == sizeof (EMACS_INT
))
1493 XSETINT (val
, atoi (read_buffer
));
1494 else if (sizeof (long) == sizeof (EMACS_INT
))
1495 XSETINT (val
, atol (read_buffer
));
1501 #ifdef LISP_FLOAT_TYPE
1502 if (isfloat_string (read_buffer
))
1503 return make_float (atof (read_buffer
));
1507 return intern (read_buffer
);
1512 #ifdef LISP_FLOAT_TYPE
1527 if (*cp
== '+' || *cp
== '-')
1530 if (*cp
>= '0' && *cp
<= '9')
1533 while (*cp
>= '0' && *cp
<= '9')
1541 if (*cp
>= '0' && *cp
<= '9')
1544 while (*cp
>= '0' && *cp
<= '9')
1551 if (*cp
== '+' || *cp
== '-')
1555 if (*cp
>= '0' && *cp
<= '9')
1558 while (*cp
>= '0' && *cp
<= '9')
1561 return (((*cp
== 0) || (*cp
== ' ') || (*cp
== '\t') || (*cp
== '\n') || (*cp
== '\r') || (*cp
== '\f'))
1562 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
1563 || state
== (DOT_CHAR
|TRAIL_INT
)
1564 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
1565 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
1566 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
1568 #endif /* LISP_FLOAT_TYPE */
1571 read_vector (readcharfun
)
1572 Lisp_Object readcharfun
;
1576 register Lisp_Object
*ptr
;
1577 register Lisp_Object tem
, vector
;
1578 register struct Lisp_Cons
*otem
;
1581 tem
= read_list (1, readcharfun
);
1582 len
= Flength (tem
);
1583 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
1586 size
= XVECTOR (vector
)->size
;
1587 ptr
= XVECTOR (vector
)->contents
;
1588 for (i
= 0; i
< size
; i
++)
1590 ptr
[i
] = read_pure
? Fpurecopy (Fcar (tem
)) : Fcar (tem
);
1598 /* flag = 1 means check for ] to terminate rather than ) and .
1599 flag = -1 means check for starting with defun
1600 and make structure pure. */
1603 read_list (flag
, readcharfun
)
1605 register Lisp_Object readcharfun
;
1607 /* -1 means check next element for defun,
1608 0 means don't check,
1609 1 means already checked and found defun. */
1610 int defunflag
= flag
< 0 ? -1 : 0;
1611 Lisp_Object val
, tail
;
1612 register Lisp_Object elt
, tem
;
1613 struct gcpro gcpro1
, gcpro2
;
1614 /* 0 is the normal case.
1615 1 means this list is a doc reference; replace it with the number 0.
1616 2 means this list is a doc reference; replace it with the doc string. */
1617 int doc_reference
= 0;
1619 /* Initialize this to 1 if we are reading a list. */
1620 int first_in_list
= flag
<= 0;
1629 elt
= read1 (readcharfun
, &ch
, first_in_list
);
1634 /* While building, if the list starts with #$, treat it specially. */
1635 if (EQ (elt
, Vload_file_name
)
1636 && !NILP (Vpurify_flag
))
1638 if (NILP (Vdoc_file_name
))
1639 /* We have not yet called Snarf-documentation, so assume
1640 this file is described in the DOC-MM.NN file
1641 and Snarf-documentation will fill in the right value later.
1642 For now, replace the whole list with 0. */
1645 /* We have already called Snarf-documentation, so make a relative
1646 file name for this file, so it can be found properly
1647 in the installed Lisp directory.
1648 We don't use Fexpand_file_name because that would make
1649 the directory absolute now. */
1650 elt
= concat2 (build_string ("../lisp/"),
1651 Ffile_name_nondirectory (elt
));
1653 else if (EQ (elt
, Vload_file_name
)
1654 && load_force_doc_strings
)
1663 Fsignal (Qinvalid_read_syntax
,
1664 Fcons (make_string (") or . in a vector", 18), Qnil
));
1672 XCONS (tail
)->cdr
= read0 (readcharfun
);
1674 val
= read0 (readcharfun
);
1675 read1 (readcharfun
, &ch
, 0);
1679 if (doc_reference
== 1)
1680 return make_number (0);
1681 if (doc_reference
== 2)
1683 /* Get a doc string from the file we are loading.
1684 If it's in saved_doc_string, get it from there. */
1685 int pos
= XINT (XCONS (val
)->cdr
);
1686 if (pos
>= saved_doc_string_position
1687 && pos
< (saved_doc_string_position
1688 + saved_doc_string_length
))
1690 int start
= pos
- saved_doc_string_position
;
1693 /* Process quoting with ^A,
1694 and find the end of the string,
1695 which is marked with ^_ (037). */
1696 for (from
= start
, to
= start
;
1697 saved_doc_string
[from
] != 037;)
1699 int c
= saved_doc_string
[from
++];
1702 c
= saved_doc_string
[from
++];
1704 saved_doc_string
[to
++] = c
;
1706 saved_doc_string
[to
++] = 0;
1708 saved_doc_string
[to
++] = 037;
1711 saved_doc_string
[to
++] = c
;
1714 return make_string (saved_doc_string
+ start
,
1718 return read_doc_string (val
);
1723 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string (". in wrong context", 18), Qnil
));
1725 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("] in a list", 11), Qnil
));
1727 tem
= (read_pure
&& flag
<= 0
1728 ? pure_cons (elt
, Qnil
)
1729 : Fcons (elt
, Qnil
));
1731 XCONS (tail
)->cdr
= tem
;
1736 defunflag
= EQ (elt
, Qdefun
);
1737 else if (defunflag
> 0)
1742 Lisp_Object Vobarray
;
1743 Lisp_Object initial_obarray
;
1745 /* oblookup stores the bucket number here, for the sake of Funintern. */
1747 int oblookup_last_bucket_number
;
1749 static int hash_string ();
1750 Lisp_Object
oblookup ();
1752 /* Get an error if OBARRAY is not an obarray.
1753 If it is one, return it. */
1756 check_obarray (obarray
)
1757 Lisp_Object obarray
;
1759 while (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1761 /* If Vobarray is now invalid, force it to be valid. */
1762 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
1764 obarray
= wrong_type_argument (Qvectorp
, obarray
);
1769 /* Intern the C string STR: return a symbol with that name,
1770 interned in the current obarray. */
1777 int len
= strlen (str
);
1778 Lisp_Object obarray
;
1781 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1782 obarray
= check_obarray (obarray
);
1783 tem
= oblookup (obarray
, str
, len
);
1786 return Fintern ((!NILP (Vpurify_flag
)
1787 ? make_pure_string (str
, len
)
1788 : make_string (str
, len
)),
1792 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
1793 "Return the canonical symbol whose name is STRING.\n\
1794 If there is none, one is created by this function and returned.\n\
1795 A second optional argument specifies the obarray to use;\n\
1796 it defaults to the value of `obarray'.")
1798 Lisp_Object str
, obarray
;
1800 register Lisp_Object tem
, sym
, *ptr
;
1802 if (NILP (obarray
)) obarray
= Vobarray
;
1803 obarray
= check_obarray (obarray
);
1805 CHECK_STRING (str
, 0);
1807 tem
= oblookup (obarray
, XSTRING (str
)->data
, XSTRING (str
)->size
);
1808 if (!INTEGERP (tem
))
1811 if (!NILP (Vpurify_flag
))
1812 str
= Fpurecopy (str
);
1813 sym
= Fmake_symbol (str
);
1815 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
1817 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
1819 XSYMBOL (sym
)->next
= 0;
1824 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
1825 "Return the canonical symbol whose name is STRING, or nil if none exists.\n\
1826 A second optional argument specifies the obarray to use;\n\
1827 it defaults to the value of `obarray'.")
1829 Lisp_Object str
, obarray
;
1831 register Lisp_Object tem
;
1833 if (NILP (obarray
)) obarray
= Vobarray
;
1834 obarray
= check_obarray (obarray
);
1836 CHECK_STRING (str
, 0);
1838 tem
= oblookup (obarray
, XSTRING (str
)->data
, XSTRING (str
)->size
);
1839 if (!INTEGERP (tem
))
1844 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
1845 "Delete the symbol named NAME, if any, from OBARRAY.\n\
1846 The value is t if a symbol was found and deleted, nil otherwise.\n\
1847 NAME may be a string or a symbol. If it is a symbol, that symbol\n\
1848 is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\
1849 OBARRAY defaults to the value of the variable `obarray'.")
1851 Lisp_Object name
, obarray
;
1853 register Lisp_Object string
, tem
;
1856 if (NILP (obarray
)) obarray
= Vobarray
;
1857 obarray
= check_obarray (obarray
);
1860 XSETSTRING (string
, XSYMBOL (name
)->name
);
1863 CHECK_STRING (name
, 0);
1867 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1870 /* If arg was a symbol, don't delete anything but that symbol itself. */
1871 if (SYMBOLP (name
) && !EQ (name
, tem
))
1874 hash
= oblookup_last_bucket_number
;
1876 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
1878 if (XSYMBOL (tem
)->next
)
1879 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
1881 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
1885 Lisp_Object tail
, following
;
1887 for (tail
= XVECTOR (obarray
)->contents
[hash
];
1888 XSYMBOL (tail
)->next
;
1891 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
1892 if (EQ (following
, tem
))
1894 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
1903 /* Return the symbol in OBARRAY whose names matches the string
1904 of SIZE characters at PTR. If there is no such symbol in OBARRAY,
1907 Also store the bucket number in oblookup_last_bucket_number. */
1910 oblookup (obarray
, ptr
, size
)
1911 Lisp_Object obarray
;
1917 register Lisp_Object tail
;
1918 Lisp_Object bucket
, tem
;
1920 if (!VECTORP (obarray
)
1921 || (obsize
= XVECTOR (obarray
)->size
) == 0)
1923 obarray
= check_obarray (obarray
);
1924 obsize
= XVECTOR (obarray
)->size
;
1926 /* Combining next two lines breaks VMS C 2.3. */
1927 hash
= hash_string (ptr
, size
);
1929 bucket
= XVECTOR (obarray
)->contents
[hash
];
1930 oblookup_last_bucket_number
= hash
;
1931 if (XFASTINT (bucket
) == 0)
1933 else if (!SYMBOLP (bucket
))
1934 error ("Bad data in guts of obarray"); /* Like CADR error message */
1936 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
1938 if (XSYMBOL (tail
)->name
->size
== size
1939 && !bcmp (XSYMBOL (tail
)->name
->data
, ptr
, size
))
1941 else if (XSYMBOL (tail
)->next
== 0)
1944 XSETINT (tem
, hash
);
1949 hash_string (ptr
, len
)
1953 register unsigned char *p
= ptr
;
1954 register unsigned char *end
= p
+ len
;
1955 register unsigned char c
;
1956 register int hash
= 0;
1961 if (c
>= 0140) c
-= 40;
1962 hash
= ((hash
<<3) + (hash
>>28) + c
);
1964 return hash
& 07777777777;
1968 map_obarray (obarray
, fn
, arg
)
1969 Lisp_Object obarray
;
1974 register Lisp_Object tail
;
1975 CHECK_VECTOR (obarray
, 1);
1976 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
1978 tail
= XVECTOR (obarray
)->contents
[i
];
1979 if (XFASTINT (tail
) != 0)
1983 if (XSYMBOL (tail
)->next
== 0)
1985 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
1990 mapatoms_1 (sym
, function
)
1991 Lisp_Object sym
, function
;
1993 call1 (function
, sym
);
1996 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
1997 "Call FUNCTION on every symbol in OBARRAY.\n\
1998 OBARRAY defaults to the value of `obarray'.")
2000 Lisp_Object function
, obarray
;
2004 if (NILP (obarray
)) obarray
= Vobarray
;
2005 obarray
= check_obarray (obarray
);
2007 map_obarray (obarray
, mapatoms_1
, function
);
2011 #define OBARRAY_SIZE 1511
2016 Lisp_Object oblength
;
2020 XSETFASTINT (oblength
, OBARRAY_SIZE
);
2022 Qnil
= Fmake_symbol (make_pure_string ("nil", 3));
2023 Vobarray
= Fmake_vector (oblength
, make_number (0));
2024 initial_obarray
= Vobarray
;
2025 staticpro (&initial_obarray
);
2026 /* Intern nil in the obarray */
2027 /* These locals are to kludge around a pyramid compiler bug. */
2028 hash
= hash_string ("nil", 3);
2029 /* Separate statement here to avoid VAXC bug. */
2030 hash
%= OBARRAY_SIZE
;
2031 tem
= &XVECTOR (Vobarray
)->contents
[hash
];
2034 Qunbound
= Fmake_symbol (make_pure_string ("unbound", 7));
2035 XSYMBOL (Qnil
)->function
= Qunbound
;
2036 XSYMBOL (Qunbound
)->value
= Qunbound
;
2037 XSYMBOL (Qunbound
)->function
= Qunbound
;
2040 XSYMBOL (Qnil
)->value
= Qnil
;
2041 XSYMBOL (Qnil
)->plist
= Qnil
;
2042 XSYMBOL (Qt
)->value
= Qt
;
2044 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
2047 Qvariable_documentation
= intern ("variable-documentation");
2049 read_buffer_size
= 100;
2050 read_buffer
= (char *) malloc (read_buffer_size
);
2055 struct Lisp_Subr
*sname
;
2058 sym
= intern (sname
->symbol_name
);
2059 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2062 #ifdef NOTDEF /* use fset in subr.el now */
2064 defalias (sname
, string
)
2065 struct Lisp_Subr
*sname
;
2069 sym
= intern (string
);
2070 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2074 /* Define an "integer variable"; a symbol whose value is forwarded
2075 to a C variable of type int. Sample call: */
2076 /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */
2078 defvar_int (namestring
, address
)
2082 Lisp_Object sym
, val
;
2083 sym
= intern (namestring
);
2084 val
= allocate_misc ();
2085 XMISCTYPE (val
) = Lisp_Misc_Intfwd
;
2086 XINTFWD (val
)->intvar
= address
;
2087 XSYMBOL (sym
)->value
= val
;
2090 /* Similar but define a variable whose value is T if address contains 1,
2091 NIL if address contains 0 */
2093 defvar_bool (namestring
, address
)
2097 Lisp_Object sym
, val
;
2098 sym
= intern (namestring
);
2099 val
= allocate_misc ();
2100 XMISCTYPE (val
) = Lisp_Misc_Boolfwd
;
2101 XBOOLFWD (val
)->boolvar
= address
;
2102 XSYMBOL (sym
)->value
= val
;
2105 /* Similar but define a variable whose value is the Lisp Object stored
2106 at address. Two versions: with and without gc-marking of the C
2107 variable. The nopro version is used when that variable will be
2108 gc-marked for some other reason, since marking the same slot twice
2109 can cause trouble with strings. */
2111 defvar_lisp_nopro (namestring
, address
)
2113 Lisp_Object
*address
;
2115 Lisp_Object sym
, val
;
2116 sym
= intern (namestring
);
2117 val
= allocate_misc ();
2118 XMISCTYPE (val
) = Lisp_Misc_Objfwd
;
2119 XOBJFWD (val
)->objvar
= address
;
2120 XSYMBOL (sym
)->value
= val
;
2124 defvar_lisp (namestring
, address
)
2126 Lisp_Object
*address
;
2128 defvar_lisp_nopro (namestring
, address
);
2129 staticpro (address
);
2134 /* Similar but define a variable whose value is the Lisp Object stored in
2135 the current buffer. address is the address of the slot in the buffer
2136 that is current now. */
2139 defvar_per_buffer (namestring
, address
, type
, doc
)
2141 Lisp_Object
*address
;
2145 Lisp_Object sym
, val
;
2147 extern struct buffer buffer_local_symbols
;
2149 sym
= intern (namestring
);
2150 val
= allocate_misc ();
2151 offset
= (char *)address
- (char *)current_buffer
;
2153 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
2154 XBUFFER_OBJFWD (val
)->offset
= offset
;
2155 XSYMBOL (sym
)->value
= val
;
2156 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
) = sym
;
2157 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
) = type
;
2158 if (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
)) == 0)
2159 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
2160 slot of buffer_local_flags */
2164 #endif /* standalone */
2166 /* Similar but define a variable whose value is the Lisp Object stored
2167 at a particular offset in the current kboard object. */
2170 defvar_kboard (namestring
, offset
)
2174 Lisp_Object sym
, val
;
2175 sym
= intern (namestring
);
2176 val
= allocate_misc ();
2177 XMISCTYPE (val
) = Lisp_Misc_Kboard_Objfwd
;
2178 XKBOARD_OBJFWD (val
)->offset
= offset
;
2179 XSYMBOL (sym
)->value
= val
;
2185 int turn_off_warning
= 0;
2187 /* Compute the default load-path. */
2189 normal
= PATH_LOADSEARCH
;
2190 Vload_path
= decode_env_path (0, normal
);
2192 if (NILP (Vpurify_flag
))
2193 normal
= PATH_LOADSEARCH
;
2195 normal
= PATH_DUMPLOADSEARCH
;
2197 /* In a dumped Emacs, we normally have to reset the value of
2198 Vload_path from PATH_LOADSEARCH, since the value that was dumped
2199 uses ../lisp, instead of the path of the installed elisp
2200 libraries. However, if it appears that Vload_path was changed
2201 from the default before dumping, don't override that value. */
2204 Lisp_Object dump_path
;
2206 dump_path
= decode_env_path (0, PATH_DUMPLOADSEARCH
);
2207 if (! NILP (Fequal (dump_path
, Vload_path
)))
2209 Vload_path
= decode_env_path (0, normal
);
2210 if (!NILP (Vinstallation_directory
))
2212 /* Add to the path the lisp subdir of the
2213 installation dir, if it exists. */
2214 Lisp_Object tem
, tem1
;
2215 tem
= Fexpand_file_name (build_string ("lisp"),
2216 Vinstallation_directory
);
2217 tem1
= Ffile_exists_p (tem
);
2220 if (NILP (Fmember (tem
, Vload_path
)))
2222 turn_off_warning
= 1;
2223 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2227 /* That dir doesn't exist, so add the build-time
2228 Lisp dirs instead. */
2229 Vload_path
= nconc2 (Vload_path
, dump_path
);
2231 /* Add site-list under the installation dir, if it exists. */
2232 tem
= Fexpand_file_name (build_string ("site-lisp"),
2233 Vinstallation_directory
);
2234 tem1
= Ffile_exists_p (tem
);
2237 if (NILP (Fmember (tem
, Vload_path
)))
2238 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2244 Vload_path
= decode_env_path (0, normal
);
2248 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
2249 almost never correct, thereby causing a warning to be printed out that
2250 confuses users. Since PATH_LOADSEARCH is always overriden by the
2251 EMACSLOADPATH environment variable below, disable the warning on NT. */
2253 /* Warn if dirs in the *standard* path don't exist. */
2254 if (!turn_off_warning
)
2256 Lisp_Object path_tail
;
2258 for (path_tail
= Vload_path
;
2260 path_tail
= XCONS (path_tail
)->cdr
)
2262 Lisp_Object dirfile
;
2263 dirfile
= Fcar (path_tail
);
2264 if (STRINGP (dirfile
))
2266 dirfile
= Fdirectory_file_name (dirfile
);
2267 if (access (XSTRING (dirfile
)->data
, 0) < 0)
2269 "Warning: Lisp directory `%s' does not exist.\n",
2270 XSTRING (Fcar (path_tail
))->data
);
2274 #endif /* WINDOWSNT */
2276 /* If the EMACSLOADPATH environment variable is set, use its value.
2277 This doesn't apply if we're dumping. */
2279 if (NILP (Vpurify_flag
)
2280 && egetenv ("EMACSLOADPATH"))
2282 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
2286 load_in_progress
= 0;
2288 load_descriptor_list
= Qnil
;
2295 defsubr (&Sread_from_string
);
2297 defsubr (&Sintern_soft
);
2298 defsubr (&Sunintern
);
2300 defsubr (&Seval_buffer
);
2301 defsubr (&Seval_region
);
2302 defsubr (&Sread_char
);
2303 defsubr (&Sread_char_exclusive
);
2304 defsubr (&Sread_event
);
2305 defsubr (&Sget_file_char
);
2306 defsubr (&Smapatoms
);
2308 DEFVAR_LISP ("obarray", &Vobarray
,
2309 "Symbol table for use by `intern' and `read'.\n\
2310 It is a vector whose length ought to be prime for best results.\n\
2311 The vector's contents don't make sense if examined from Lisp programs;\n\
2312 to find all the symbols in an obarray, use `mapatoms'.");
2314 DEFVAR_LISP ("values", &Vvalues
,
2315 "List of values of all expressions which were read, evaluated and printed.\n\
2316 Order is reverse chronological.");
2318 DEFVAR_LISP ("standard-input", &Vstandard_input
,
2319 "Stream for read to get input from.\n\
2320 See documentation of `read' for possible values.");
2321 Vstandard_input
= Qt
;
2323 DEFVAR_LISP ("load-path", &Vload_path
,
2324 "*List of directories to search for files to load.\n\
2325 Each element is a string (directory name) or nil (try default directory).\n\
2326 Initialized based on EMACSLOADPATH environment variable, if any,\n\
2327 otherwise to default specified by file `paths.h' when Emacs was built.");
2329 DEFVAR_BOOL ("load-in-progress", &load_in_progress
,
2330 "Non-nil iff inside of `load'.");
2332 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist
,
2333 "An alist of expressions to be evalled when particular files are loaded.\n\
2334 Each element looks like (FILENAME FORMS...).\n\
2335 When `load' is run and the file-name argument is FILENAME,\n\
2336 the FORMS in the corresponding element are executed at the end of loading.\n\n\
2337 FILENAME must match exactly! Normally FILENAME is the name of a library,\n\
2338 with no directory specified, since that is how `load' is normally called.\n\
2339 An error in FORMS does not undo the load,\n\
2340 but does prevent execution of the rest of the FORMS.");
2341 Vafter_load_alist
= Qnil
;
2343 DEFVAR_LISP ("load-history", &Vload_history
,
2344 "Alist mapping source file names to symbols and features.\n\
2345 Each alist element is a list that starts with a file name,\n\
2346 except for one element (optional) that starts with nil and describes\n\
2347 definitions evaluated from buffers not visiting files.\n\
2348 The remaining elements of each list are symbols defined as functions\n\
2349 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
2350 Vload_history
= Qnil
;
2352 DEFVAR_LISP ("load-file-name", &Vload_file_name
,
2353 "Full name of file being loaded by `load'.");
2354 Vload_file_name
= Qnil
;
2356 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list
,
2357 "Used for internal purposes by `load'.");
2358 Vcurrent_load_list
= Qnil
;
2360 DEFVAR_LISP ("load-read-function", &Vload_read_function
,
2361 "Function used by `load' and `eval-region' for reading expressions.\n\
2362 The default is nil, which means use the function `read'.");
2363 Vload_read_function
= Qnil
;
2365 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings
,
2366 "Non-nil means `load' should force-load all dynamic doc strings.\n\
2367 This is useful when the file being loaded is a temporary copy.");
2368 load_force_doc_strings
= 0;
2370 load_descriptor_list
= Qnil
;
2371 staticpro (&load_descriptor_list
);
2373 Qcurrent_load_list
= intern ("current-load-list");
2374 staticpro (&Qcurrent_load_list
);
2376 Qstandard_input
= intern ("standard-input");
2377 staticpro (&Qstandard_input
);
2379 Qread_char
= intern ("read-char");
2380 staticpro (&Qread_char
);
2382 Qget_file_char
= intern ("get-file-char");
2383 staticpro (&Qget_file_char
);
2385 Qbackquote
= intern ("`");
2386 staticpro (&Qbackquote
);
2387 Qcomma
= intern (",");
2388 staticpro (&Qcomma
);
2389 Qcomma_at
= intern (",@");
2390 staticpro (&Qcomma_at
);
2391 Qcomma_dot
= intern (",.");
2392 staticpro (&Qcomma_dot
);
2394 Qascii_character
= intern ("ascii-character");
2395 staticpro (&Qascii_character
);
2397 Qload
= intern ("load");
2400 Qload_file_name
= intern ("load-file-name");
2401 staticpro (&Qload_file_name
);