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, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include <sys/types.h>
36 #include "termhooks.h"
40 #include <sys/inode.h>
45 #include <unistd.h> /* to get X_OK */
54 #ifdef LISP_FLOAT_TYPE
60 #endif /* LISP_FLOAT_TYPE */
64 #endif /* HAVE_SETLOCALE */
72 Lisp_Object Qread_char
, Qget_file_char
, Qstandard_input
, Qcurrent_load_list
;
73 Lisp_Object Qvariable_documentation
, Vvalues
, Vstandard_input
, Vafter_load_alist
;
74 Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
75 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
77 extern Lisp_Object Qevent_symbol_element_mask
;
79 /* non-zero if inside `load' */
82 /* Directory in which the sources were found. */
83 Lisp_Object Vsource_directory
;
85 /* Search path for files to be loaded. */
86 Lisp_Object Vload_path
;
88 /* This is the user-visible association list that maps features to
89 lists of defs in their load files. */
90 Lisp_Object Vload_history
;
92 /* This is used to build the load history. */
93 Lisp_Object Vcurrent_load_list
;
95 /* Name of file actually being read by `load'. */
96 Lisp_Object Vload_file_name
;
98 /* Function to use for reading, in `load' and friends. */
99 Lisp_Object Vload_read_function
;
101 /* The association list of objects read with the #n=object form.
102 Each member of the list has the form (n . object), and is used to
103 look up the object for the corresponding #n# construct.
104 It must be set to nil before all top-level calls to read0. */
105 Lisp_Object read_objects
;
107 /* Nonzero means load should forcibly load all dynamic doc strings. */
108 static int load_force_doc_strings
;
110 /* List of descriptors now open for Fload. */
111 static Lisp_Object load_descriptor_list
;
113 /* File for get_file_char to read from. Use by load. */
114 static FILE *instream
;
116 /* When nonzero, read conses in pure space */
117 static int read_pure
;
119 /* For use within read-from-string (this reader is non-reentrant!!) */
120 static int read_from_string_index
;
121 static int read_from_string_limit
;
123 /* This contains the last string skipped with #@. */
124 static char *saved_doc_string
;
125 /* Length of buffer allocated in saved_doc_string. */
126 static int saved_doc_string_size
;
127 /* Length of actual data in saved_doc_string. */
128 static int saved_doc_string_length
;
129 /* This is the file position that string came from. */
130 static int saved_doc_string_position
;
132 /* Nonzero means inside a new-style backquote
133 with no surrounding parentheses.
134 Fread initializes this to zero, so we need not specbind it
135 or worry about what happens to it when there is an error. */
136 static int new_backquote_flag
;
138 /* Handle unreading and rereading of characters.
139 Write READCHAR to read a character,
140 UNREAD(c) to unread c to be read again. */
142 #define READCHAR readchar (readcharfun)
143 #define UNREAD(c) unreadchar (readcharfun, c)
146 readchar (readcharfun
)
147 Lisp_Object readcharfun
;
150 register struct buffer
*inbuffer
;
151 register int c
, mpos
;
153 if (BUFFERP (readcharfun
))
155 inbuffer
= XBUFFER (readcharfun
);
157 if (BUF_PT (inbuffer
) >= BUF_ZV (inbuffer
))
159 c
= *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer
, BUF_PT (inbuffer
));
160 SET_BUF_PT (inbuffer
, BUF_PT (inbuffer
) + 1);
164 if (MARKERP (readcharfun
))
166 inbuffer
= XMARKER (readcharfun
)->buffer
;
168 mpos
= marker_position (readcharfun
);
170 if (mpos
> BUF_ZV (inbuffer
) - 1)
172 c
= *(unsigned char *) BUF_CHAR_ADDRESS (inbuffer
, mpos
);
173 if (mpos
!= BUF_GPT (inbuffer
))
174 XMARKER (readcharfun
)->bufpos
++;
176 Fset_marker (readcharfun
, make_number (mpos
+ 1),
177 Fmarker_buffer (readcharfun
));
180 if (EQ (readcharfun
, Qget_file_char
))
184 /* Interrupted reads have been observed while reading over the network */
185 while (c
== EOF
&& ferror (instream
) && errno
== EINTR
)
194 if (STRINGP (readcharfun
))
197 /* This used to be return of a conditional expression,
198 but that truncated -1 to a char on VMS. */
199 if (read_from_string_index
< read_from_string_limit
)
200 c
= XSTRING (readcharfun
)->data
[read_from_string_index
++];
206 tem
= call0 (readcharfun
);
213 /* Unread the character C in the way appropriate for the stream READCHARFUN.
214 If the stream is a user function, call it with the char as argument. */
217 unreadchar (readcharfun
, c
)
218 Lisp_Object readcharfun
;
222 /* Don't back up the pointer if we're unreading the end-of-input mark,
223 since readchar didn't advance it when we read it. */
225 else if (BUFFERP (readcharfun
))
227 if (XBUFFER (readcharfun
) == current_buffer
)
230 SET_BUF_PT (XBUFFER (readcharfun
), BUF_PT (XBUFFER (readcharfun
)) - 1);
232 else if (MARKERP (readcharfun
))
233 XMARKER (readcharfun
)->bufpos
--;
234 else if (STRINGP (readcharfun
))
235 read_from_string_index
--;
236 else if (EQ (readcharfun
, Qget_file_char
))
237 ungetc (c
, instream
);
239 call1 (readcharfun
, make_number (c
));
242 static Lisp_Object
read0 (), read1 (), read_list (), read_vector ();
244 /* get a character from the tty */
246 extern Lisp_Object
read_char ();
248 /* Read input events until we get one that's acceptable for our purposes.
250 If NO_SWITCH_FRAME is non-zero, switch-frame events are stashed
251 until we get a character we like, and then stuffed into
254 If ASCII_REQUIRED is non-zero, we check function key events to see
255 if the unmodified version of the symbol has a Qascii_character
256 property, and use that character, if present.
258 If ERROR_NONASCII is non-zero, we signal an error if the input we
259 get isn't an ASCII character with modifiers. If it's zero but
260 ASCII_REQUIRED is non-zero, we just re-read until we get an ASCII
264 read_filtered_event (no_switch_frame
, ascii_required
, error_nonascii
)
265 int no_switch_frame
, ascii_required
, error_nonascii
;
268 return make_number (getchar ());
270 register Lisp_Object val
, delayed_switch_frame
;
272 delayed_switch_frame
= Qnil
;
274 /* Read until we get an acceptable event. */
276 val
= read_char (0, 0, 0, Qnil
, 0);
281 /* switch-frame events are put off until after the next ASCII
282 character. This is better than signaling an error just because
283 the last characters were typed to a separate minibuffer frame,
284 for example. Eventually, some code which can deal with
285 switch-frame events will read it and process it. */
287 && EVENT_HAS_PARAMETERS (val
)
288 && EQ (EVENT_HEAD (val
), Qswitch_frame
))
290 delayed_switch_frame
= val
;
296 /* Convert certain symbols to their ASCII equivalents. */
299 Lisp_Object tem
, tem1
, tem2
;
300 tem
= Fget (val
, Qevent_symbol_element_mask
);
303 tem1
= Fget (Fcar (tem
), Qascii_character
);
304 /* Merge this symbol's modifier bits
305 with the ASCII equivalent of its basic code. */
307 XSETFASTINT (val
, XINT (tem1
) | XINT (Fcar (Fcdr (tem
))));
311 /* If we don't have a character now, deal with it appropriately. */
316 Vunread_command_events
= Fcons (val
, Qnil
);
317 error ("Non-character input-event");
324 if (! NILP (delayed_switch_frame
))
325 unread_switch_frame
= delayed_switch_frame
;
331 DEFUN ("read-char", Fread_char
, Sread_char
, 0, 0, 0,
332 "Read a character from the command input (keyboard or macro).\n\
333 It is returned as a number.\n\
334 If the user generates an event which is not a character (i.e. a mouse\n\
335 click or function key event), `read-char' signals an error. As an\n\
336 exception, switch-frame events are put off until non-ASCII events can\n\
338 If you want to read non-character events, or ignore them, call\n\
339 `read-event' or `read-char-exclusive' instead.")
342 return read_filtered_event (1, 1, 1);
345 DEFUN ("read-event", Fread_event
, Sread_event
, 0, 0, 0,
346 "Read an event object from the input stream.")
349 return read_filtered_event (0, 0, 0);
352 DEFUN ("read-char-exclusive", Fread_char_exclusive
, Sread_char_exclusive
, 0, 0, 0,
353 "Read a character from the command input (keyboard or macro).\n\
354 It is returned as a number. Non-character events are ignored.")
357 return read_filtered_event (1, 1, 0);
360 DEFUN ("get-file-char", Fget_file_char
, Sget_file_char
, 0, 0, 0,
361 "Don't use this yourself.")
364 register Lisp_Object val
;
365 XSETINT (val
, getc (instream
));
369 static void readevalloop ();
370 static Lisp_Object
load_unwind ();
371 static Lisp_Object
load_descriptor_unwind ();
373 DEFUN ("load", Fload
, Sload
, 1, 4, 0,
374 "Execute a file of Lisp code named FILE.\n\
375 First try FILE with `.elc' appended, then try with `.el',\n\
376 then try FILE unmodified.\n\
377 This function searches the directories in `load-path'.\n\
378 If optional second arg NOERROR is non-nil,\n\
379 report no error if FILE doesn't exist.\n\
380 Print messages at start and end of loading unless\n\
381 optional third arg NOMESSAGE is non-nil.\n\
382 If optional fourth arg NOSUFFIX is non-nil, don't try adding\n\
383 suffixes `.elc' or `.el' to the specified name FILE.\n\
384 Return t if file exists.")
385 (file
, noerror
, nomessage
, nosuffix
)
386 Lisp_Object file
, noerror
, nomessage
, nosuffix
;
388 register FILE *stream
;
389 register int fd
= -1;
390 register Lisp_Object lispstream
;
391 int count
= specpdl_ptr
- specpdl
;
395 /* 1 means we printed the ".el is newer" message. */
397 /* 1 means we are loading a compiled file. */
401 char *dosmode
= "rt";
404 CHECK_STRING (file
, 0);
406 /* If file name is magic, call the handler. */
407 handler
= Ffind_file_name_handler (file
, Qload
);
409 return call5 (handler
, Qload
, file
, noerror
, nomessage
, nosuffix
);
411 /* Do this after the handler to avoid
412 the need to gcpro noerror, nomessage and nosuffix.
413 (Below here, we care only whether they are nil or not.) */
414 file
= Fsubstitute_in_file_name (file
);
416 /* Avoid weird lossage with null string as arg,
417 since it would try to load a directory as a Lisp file */
418 if (XSTRING (file
)->size
> 0)
421 fd
= openp (Vload_path
, file
, !NILP (nosuffix
) ? "" : ".elc:.el:",
430 Fsignal (Qfile_error
, Fcons (build_string ("Cannot open load file"),
431 Fcons (file
, Qnil
)));
436 if (!bcmp (&(XSTRING (found
)->data
[XSTRING (found
)->size
- 4]),
447 stat ((char *)XSTRING (found
)->data
, &s1
);
448 XSTRING (found
)->data
[XSTRING (found
)->size
- 1] = 0;
449 result
= stat ((char *)XSTRING (found
)->data
, &s2
);
450 if (result
>= 0 && (unsigned) s1
.st_mtime
< (unsigned) s2
.st_mtime
)
452 /* Make the progress messages mention that source is newer. */
455 /* If we won't print another message, mention this anyway. */
456 if (! NILP (nomessage
))
457 message ("Source file `%s' newer than byte-compiled file",
458 XSTRING (found
)->data
);
460 XSTRING (found
)->data
[XSTRING (found
)->size
- 1] = 'c';
465 stream
= fopen ((char *) XSTRING (found
)->data
, dosmode
);
466 #else /* not DOS_NT */
467 stream
= fdopen (fd
, "r");
468 #endif /* not DOS_NT */
472 error ("Failure to create stdio stream for %s", XSTRING (file
)->data
);
475 if (NILP (nomessage
))
478 message ("Loading %s (compiled; note, source file is newer)...",
479 XSTRING (file
)->data
);
481 message ("Loading %s (compiled)...", XSTRING (file
)->data
);
483 message ("Loading %s...", XSTRING (file
)->data
);
487 lispstream
= Fcons (Qnil
, Qnil
);
488 XSETFASTINT (XCONS (lispstream
)->car
, (EMACS_UINT
)stream
>> 16);
489 XSETFASTINT (XCONS (lispstream
)->cdr
, (EMACS_UINT
)stream
& 0xffff);
490 record_unwind_protect (load_unwind
, lispstream
);
491 record_unwind_protect (load_descriptor_unwind
, load_descriptor_list
);
492 specbind (Qload_file_name
, found
);
494 = Fcons (make_number (fileno (stream
)), load_descriptor_list
);
496 readevalloop (Qget_file_char
, stream
, file
, Feval
, 0);
497 unbind_to (count
, Qnil
);
499 /* Run any load-hooks for this file. */
500 temp
= Fassoc (file
, Vafter_load_alist
);
502 Fprogn (Fcdr (temp
));
505 if (saved_doc_string
)
506 free (saved_doc_string
);
507 saved_doc_string
= 0;
508 saved_doc_string_size
= 0;
510 if (!noninteractive
&& NILP (nomessage
))
513 message ("Loading %s (compiled; note, source file is newer)...done",
514 XSTRING (file
)->data
);
516 message ("Loading %s (compiled)...done", XSTRING (file
)->data
);
518 message ("Loading %s...done", XSTRING (file
)->data
);
524 load_unwind (stream
) /* used as unwind-protect function in load */
527 fclose ((FILE *) (XFASTINT (XCONS (stream
)->car
) << 16
528 | XFASTINT (XCONS (stream
)->cdr
)));
529 if (--load_in_progress
< 0) load_in_progress
= 0;
534 load_descriptor_unwind (oldlist
)
537 load_descriptor_list
= oldlist
;
541 /* Close all descriptors in use for Floads.
542 This is used when starting a subprocess. */
549 for (tail
= load_descriptor_list
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
550 close (XFASTINT (XCONS (tail
)->car
));
555 complete_filename_p (pathname
)
556 Lisp_Object pathname
;
558 register unsigned char *s
= XSTRING (pathname
)->data
;
559 return (IS_DIRECTORY_SEP (s
[0])
560 || (XSTRING (pathname
)->size
> 2
561 && IS_DEVICE_SEP (s
[1]) && IS_DIRECTORY_SEP (s
[2]))
571 /* Search for a file whose name is STR, looking in directories
572 in the Lisp list PATH, and trying suffixes from SUFFIX.
573 SUFFIX is a string containing possible suffixes separated by colons.
574 On success, returns a file descriptor. On failure, returns -1.
576 EXEC_ONLY nonzero means don't open the files,
577 just look for one that is executable. In this case,
578 returns 1 on success.
580 If STOREPTR is nonzero, it points to a slot where the name of
581 the file actually found should be stored as a Lisp string.
582 Nil is stored there on failure. */
585 openp (path
, str
, suffix
, storeptr
, exec_only
)
586 Lisp_Object path
, str
;
588 Lisp_Object
*storeptr
;
594 register char *fn
= buf
;
597 register Lisp_Object filename
;
605 if (complete_filename_p (str
))
608 for (; !NILP (path
); path
= Fcdr (path
))
612 filename
= Fexpand_file_name (str
, Fcar (path
));
613 if (!complete_filename_p (filename
))
614 /* If there are non-absolute elts in PATH (eg ".") */
615 /* Of course, this could conceivably lose if luser sets
616 default-directory to be something non-absolute... */
618 filename
= Fexpand_file_name (filename
, current_buffer
->directory
);
619 if (!complete_filename_p (filename
))
620 /* Give up on this path element! */
624 /* Calculate maximum size of any filename made from
625 this path element/specified file name and any possible suffix. */
626 want_size
= strlen (suffix
) + XSTRING (filename
)->size
+ 1;
627 if (fn_size
< want_size
)
628 fn
= (char *) alloca (fn_size
= 100 + want_size
);
632 /* Loop over suffixes. */
635 char *esuffix
= (char *) index (nsuffix
, ':');
636 int lsuffix
= esuffix
? esuffix
- nsuffix
: strlen (nsuffix
);
638 /* Concatenate path element/specified name with the suffix. */
639 strncpy (fn
, XSTRING (filename
)->data
, XSTRING (filename
)->size
);
640 fn
[XSTRING (filename
)->size
] = 0;
641 if (lsuffix
!= 0) /* Bug happens on CCI if lsuffix is 0. */
642 strncat (fn
, nsuffix
, lsuffix
);
644 /* Ignore file if it's a directory. */
645 if (stat (fn
, &st
) >= 0
646 && (st
.st_mode
& S_IFMT
) != S_IFDIR
)
648 /* Check that we can access or open it. */
650 fd
= (access (fn
, X_OK
) == 0) ? 1 : -1;
652 fd
= open (fn
, O_RDONLY
, 0);
656 /* We succeeded; return this descriptor and filename. */
658 *storeptr
= build_string (fn
);
664 /* Advance to next suffix. */
667 nsuffix
+= lsuffix
+ 1;
678 /* Merge the list we've accumulated of globals from the current input source
679 into the load_history variable. The details depend on whether
680 the source has an associated file name or not. */
683 build_load_history (stream
, source
)
687 register Lisp_Object tail
, prev
, newelt
;
688 register Lisp_Object tem
, tem2
;
689 register int foundit
, loading
;
691 /* Don't bother recording anything for preloaded files. */
692 if (!NILP (Vpurify_flag
))
695 loading
= stream
|| !NARROWED
;
697 tail
= Vload_history
;
704 /* Find the feature's previous assoc list... */
705 if (!NILP (Fequal (source
, Fcar (tem
))))
709 /* If we're loading, remove it. */
713 Vload_history
= Fcdr (tail
);
715 Fsetcdr (prev
, Fcdr (tail
));
718 /* Otherwise, cons on new symbols that are not already members. */
721 tem2
= Vcurrent_load_list
;
725 newelt
= Fcar (tem2
);
727 if (NILP (Fmemq (newelt
, tem
)))
728 Fsetcar (tail
, Fcons (Fcar (tem
),
729 Fcons (newelt
, Fcdr (tem
))));
742 /* If we're loading, cons the new assoc onto the front of load-history,
743 the most-recently-loaded position. Also do this if we didn't find
744 an existing member for the current source. */
745 if (loading
|| !foundit
)
746 Vload_history
= Fcons (Fnreverse (Vcurrent_load_list
),
751 unreadpure () /* Used as unwind-protect function in readevalloop */
758 readevalloop (readcharfun
, stream
, sourcename
, evalfun
, printflag
)
759 Lisp_Object readcharfun
;
761 Lisp_Object sourcename
;
762 Lisp_Object (*evalfun
) ();
766 register Lisp_Object val
;
767 int count
= specpdl_ptr
- specpdl
;
769 struct buffer
*b
= 0;
771 if (BUFFERP (readcharfun
))
772 b
= XBUFFER (readcharfun
);
773 else if (MARKERP (readcharfun
))
774 b
= XMARKER (readcharfun
)->buffer
;
776 specbind (Qstandard_input
, readcharfun
);
777 specbind (Qcurrent_load_list
, Qnil
);
781 LOADHIST_ATTACH (sourcename
);
785 if (b
!= 0 && NILP (b
->name
))
786 error ("Reading from killed buffer");
792 while ((c
= READCHAR
) != '\n' && c
!= -1);
797 /* Ignore whitespace here, so we can detect eof. */
798 if (c
== ' ' || c
== '\t' || c
== '\n' || c
== '\f' || c
== '\r')
801 if (!NILP (Vpurify_flag
) && c
== '(')
803 int count1
= specpdl_ptr
- specpdl
;
804 record_unwind_protect (unreadpure
, Qnil
);
805 val
= read_list (-1, readcharfun
);
806 unbind_to (count1
, Qnil
);
812 if (NILP (Vload_read_function
))
813 val
= read0 (readcharfun
);
815 val
= call1 (Vload_read_function
, readcharfun
);
818 val
= (*evalfun
) (val
);
821 Vvalues
= Fcons (val
, Vvalues
);
822 if (EQ (Vstandard_output
, Qt
))
829 build_load_history (stream
, sourcename
);
832 unbind_to (count
, Qnil
);
837 DEFUN ("eval-buffer", Feval_buffer
, Seval_buffer
, 0, 2, "",
838 "Execute the current buffer as Lisp code.\n\
839 Programs can pass two arguments, BUFFER and PRINTFLAG.\n\
840 BUFFER is the buffer to evaluate (nil means use current buffer).\n\
841 PRINTFLAG controls printing of output:\n\
842 nil means discard it; anything else is stream for print.\n\
844 If there is no error, point does not move. If there is an error,\n\
845 point remains at the end of the last character read from the buffer.")
847 Lisp_Object buffer
, printflag
;
849 int count
= specpdl_ptr
- specpdl
;
850 Lisp_Object tem
, buf
;
853 buf
= Fcurrent_buffer ();
855 buf
= Fget_buffer (buffer
);
857 error ("No such buffer.");
859 if (NILP (printflag
))
863 specbind (Qstandard_output
, tem
);
864 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
865 BUF_SET_PT (XBUFFER (buf
), BUF_BEGV (XBUFFER (buf
)));
866 readevalloop (buf
, 0, XBUFFER (buf
)->filename
, Feval
, !NILP (printflag
));
867 unbind_to (count
, Qnil
);
873 DEFUN ("eval-current-buffer", Feval_current_buffer
, Seval_current_buffer
, 0, 1, "",
874 "Execute the current buffer as Lisp code.\n\
875 Programs can pass argument PRINTFLAG which controls printing of output:\n\
876 nil means discard it; anything else is stream for print.\n\
878 If there is no error, point does not move. If there is an error,\n\
879 point remains at the end of the last character read from the buffer.")
881 Lisp_Object printflag
;
883 int count
= specpdl_ptr
- specpdl
;
884 Lisp_Object tem
, cbuf
;
886 cbuf
= Fcurrent_buffer ()
888 if (NILP (printflag
))
892 specbind (Qstandard_output
, tem
);
893 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
895 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
, Feval
, !NILP (printflag
));
896 return unbind_to (count
, Qnil
);
900 DEFUN ("eval-region", Feval_region
, Seval_region
, 2, 3, "r",
901 "Execute the region as Lisp code.\n\
902 When called from programs, expects two arguments,\n\
903 giving starting and ending indices in the current buffer\n\
904 of the text to be executed.\n\
905 Programs can pass third argument PRINTFLAG which controls output:\n\
906 nil means discard it; anything else is stream for printing it.\n\
908 If there is no error, point does not move. If there is an error,\n\
909 point remains at the end of the last character read from the buffer.")
910 (start
, end
, printflag
)
911 Lisp_Object start
, end
, printflag
;
913 int count
= specpdl_ptr
- specpdl
;
914 Lisp_Object tem
, cbuf
;
916 cbuf
= Fcurrent_buffer ();
918 if (NILP (printflag
))
922 specbind (Qstandard_output
, tem
);
924 if (NILP (printflag
))
925 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
926 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
928 /* This both uses start and checks its type. */
930 Fnarrow_to_region (make_number (BEGV
), end
);
931 readevalloop (cbuf
, 0, XBUFFER (cbuf
)->filename
, Feval
, !NILP (printflag
));
933 return unbind_to (count
, Qnil
);
936 #endif /* standalone */
938 DEFUN ("read", Fread
, Sread
, 0, 1, 0,
939 "Read one Lisp expression as text from STREAM, return as Lisp object.\n\
940 If STREAM is nil, use the value of `standard-input' (which see).\n\
941 STREAM or the value of `standard-input' may be:\n\
942 a buffer (read from point and advance it)\n\
943 a marker (read from where it points and advance it)\n\
944 a function (call it with no arguments for each character,\n\
945 call it with a char as argument to push a char back)\n\
946 a string (takes text from string, starting at the beginning)\n\
947 t (read text line using minibuffer and use it).")
951 extern Lisp_Object
Fread_minibuffer ();
954 stream
= Vstandard_input
;
958 new_backquote_flag
= 0;
962 if (EQ (stream
, Qread_char
))
963 return Fread_minibuffer (build_string ("Lisp expression: "), Qnil
);
966 if (STRINGP (stream
))
967 return Fcar (Fread_from_string (stream
, Qnil
, Qnil
));
969 return read0 (stream
);
972 DEFUN ("read-from-string", Fread_from_string
, Sread_from_string
, 1, 3, 0,
973 "Read one Lisp expression which is represented as text by STRING.\n\
974 Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).\n\
975 START and END optionally delimit a substring of STRING from which to read;\n\
976 they default to 0 and (length STRING) respectively.")
978 Lisp_Object string
, start
, end
;
980 int startval
, endval
;
983 CHECK_STRING (string
,0);
986 endval
= XSTRING (string
)->size
;
988 { CHECK_NUMBER (end
,2);
990 if (endval
< 0 || endval
> XSTRING (string
)->size
)
991 args_out_of_range (string
, end
);
997 { CHECK_NUMBER (start
,1);
998 startval
= XINT (start
);
999 if (startval
< 0 || startval
> endval
)
1000 args_out_of_range (string
, start
);
1003 read_from_string_index
= startval
;
1004 read_from_string_limit
= endval
;
1006 new_backquote_flag
= 0;
1007 read_objects
= Qnil
;
1009 tem
= read0 (string
);
1010 return Fcons (tem
, make_number (read_from_string_index
));
1013 /* Use this for recursive reads, in contexts where internal tokens
1017 Lisp_Object readcharfun
;
1019 register Lisp_Object val
;
1022 val
= read1 (readcharfun
, &c
, 0);
1024 Fsignal (Qinvalid_read_syntax
, Fcons (make_string (&c
, 1), Qnil
));
1029 static int read_buffer_size
;
1030 static char *read_buffer
;
1033 read_escape (readcharfun
)
1034 Lisp_Object readcharfun
;
1036 register int c
= READCHAR
;
1040 error ("End of file");
1066 error ("Invalid escape character syntax");
1069 c
= read_escape (readcharfun
);
1070 return c
| meta_modifier
;
1075 error ("Invalid escape character syntax");
1078 c
= read_escape (readcharfun
);
1079 return c
| shift_modifier
;
1084 error ("Invalid escape character syntax");
1087 c
= read_escape (readcharfun
);
1088 return c
| hyper_modifier
;
1093 error ("Invalid escape character syntax");
1096 c
= read_escape (readcharfun
);
1097 return c
| alt_modifier
;
1102 error ("Invalid escape character syntax");
1105 c
= read_escape (readcharfun
);
1106 return c
| super_modifier
;
1111 error ("Invalid escape character syntax");
1115 c
= read_escape (readcharfun
);
1116 if ((c
& 0177) == '?')
1118 /* ASCII control chars are made from letters (both cases),
1119 as well as the non-letters within 0100...0137. */
1120 else if ((c
& 0137) >= 0101 && (c
& 0137) <= 0132)
1121 return (c
& (037 | ~0177));
1122 else if ((c
& 0177) >= 0100 && (c
& 0177) <= 0137)
1123 return (c
& (037 | ~0177));
1125 return c
| ctrl_modifier
;
1135 /* An octal escape, as in ANSI C. */
1137 register int i
= c
- '0';
1138 register int count
= 0;
1141 if ((c
= READCHAR
) >= '0' && c
<= '7')
1156 /* A hex escape, as in ANSI C. */
1162 if (c
>= '0' && c
<= '9')
1167 else if ((c
>= 'a' && c
<= 'f')
1168 || (c
>= 'A' && c
<= 'F'))
1171 if (c
>= 'a' && c
<= 'f')
1190 /* If the next token is ')' or ']' or '.', we store that character
1191 in *PCH and the return value is not interesting. Else, we store
1192 zero in *PCH and we read and return one lisp object.
1194 FIRST_IN_LIST is nonzero if this is the first element of a list. */
1197 read1 (readcharfun
, pch
, first_in_list
)
1198 register Lisp_Object readcharfun
;
1203 int uninterned_symbol
= 0;
1210 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1215 return read_list (0, readcharfun
);
1218 return read_vector (readcharfun
);
1235 tmp
= read_vector (readcharfun
);
1236 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
1237 || XVECTOR (tmp
)->size
> CHAR_TABLE_STANDARD_SLOTS
+ 10)
1238 error ("Invalid size char-table");
1239 XSETCHAR_TABLE (tmp
, XCHAR_TABLE (tmp
));
1242 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#^", 2), Qnil
));
1247 length
= read1 (readcharfun
, pch
, first_in_list
);
1251 Lisp_Object tmp
, val
;
1252 int size_in_chars
= ((XFASTINT (length
) + BITS_PER_CHAR
)
1256 tmp
= read1 (readcharfun
, pch
, first_in_list
);
1257 if (size_in_chars
!= XSTRING (tmp
)->size
)
1258 Fsignal (Qinvalid_read_syntax
,
1259 Fcons (make_string ("#&", 2), Qnil
));
1261 val
= Fmake_bool_vector (length
, Qnil
);
1262 bcopy (XSTRING (tmp
)->data
, XBOOL_VECTOR (val
)->data
,
1266 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#&", 2), Qnil
));
1270 /* Accept compiled functions at read-time so that we don't have to
1271 build them using function calls. */
1273 tmp
= read_vector (readcharfun
);
1274 return Fmake_byte_code (XVECTOR (tmp
)->size
,
1275 XVECTOR (tmp
)->contents
);
1277 #ifdef USE_TEXT_PROPERTIES
1281 struct gcpro gcpro1
;
1284 /* Read the string itself. */
1285 tmp
= read1 (readcharfun
, &ch
, 0);
1286 if (ch
!= 0 || !STRINGP (tmp
))
1287 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1289 /* Read the intervals and their properties. */
1292 Lisp_Object beg
, end
, plist
;
1294 beg
= read1 (readcharfun
, &ch
, 0);
1298 end
= read1 (readcharfun
, &ch
, 0);
1300 plist
= read1 (readcharfun
, &ch
, 0);
1302 Fsignal (Qinvalid_read_syntax
,
1303 Fcons (build_string ("invalid string property list"),
1305 Fset_text_properties (beg
, end
, plist
, tmp
);
1311 /* #@NUMBER is used to skip NUMBER following characters.
1312 That's used in .elc files to skip over doc strings
1313 and function definitions. */
1318 /* Read a decimal integer. */
1319 while ((c
= READCHAR
) >= 0
1320 && c
>= '0' && c
<= '9')
1328 #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */
1329 if (load_force_doc_strings
&& EQ (readcharfun
, Qget_file_char
))
1331 /* If we are supposed to force doc strings into core right now,
1332 record the last string that we skipped,
1333 and record where in the file it comes from. */
1334 if (saved_doc_string_size
== 0)
1336 saved_doc_string_size
= nskip
+ 100;
1337 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
1339 if (nskip
> saved_doc_string_size
)
1341 saved_doc_string_size
= nskip
+ 100;
1342 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
1343 saved_doc_string_size
);
1346 saved_doc_string_position
= ftell (instream
);
1348 /* Copy that many characters into saved_doc_string. */
1349 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1350 saved_doc_string
[i
] = c
= READCHAR
;
1352 saved_doc_string_length
= i
;
1355 #endif /* not DOS_NT */
1357 /* Skip that many characters. */
1358 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1364 return Vload_file_name
;
1366 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
1367 /* #:foo is the uninterned symbol named foo. */
1370 uninterned_symbol
= 1;
1374 /* Reader forms that can reuse previously read objects. */
1375 if (c
>= '0' && c
<= '9')
1380 /* Read a non-negative integer. */
1381 while (c
>= '0' && c
<= '9')
1387 /* #n=object returns object, but associates it with n for #n#. */
1390 tem
= read0 (readcharfun
);
1391 read_objects
= Fcons (Fcons (make_number (n
), tem
), read_objects
);
1394 /* #n# returns a previously read object. */
1397 tem
= Fassq (make_number (n
), read_objects
);
1400 /* Fall through to error message. */
1402 /* Fall through to error message. */
1406 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1409 while ((c
= READCHAR
) >= 0 && c
!= '\n');
1414 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
1424 new_backquote_flag
= 1;
1425 value
= read0 (readcharfun
);
1426 new_backquote_flag
= 0;
1428 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
1432 if (new_backquote_flag
)
1434 Lisp_Object comma_type
= Qnil
;
1439 comma_type
= Qcomma_at
;
1441 comma_type
= Qcomma_dot
;
1444 if (ch
>= 0) UNREAD (ch
);
1445 comma_type
= Qcomma
;
1448 new_backquote_flag
= 0;
1449 value
= read0 (readcharfun
);
1450 new_backquote_flag
= 1;
1451 return Fcons (comma_type
, Fcons (value
, Qnil
));
1458 register Lisp_Object val
;
1461 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1464 XSETINT (val
, read_escape (readcharfun
));
1473 register char *p
= read_buffer
;
1474 register char *end
= read_buffer
+ read_buffer_size
;
1478 while ((c
= READCHAR
) >= 0
1483 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1484 p
+= new - read_buffer
;
1485 read_buffer
+= new - read_buffer
;
1486 end
= read_buffer
+ read_buffer_size
;
1489 c
= read_escape (readcharfun
);
1490 /* c is -1 if \ newline has just been seen */
1493 if (p
== read_buffer
)
1498 /* Allow `\C- ' and `\C-?'. */
1499 if (c
== (CHAR_CTL
| ' '))
1501 else if (c
== (CHAR_CTL
| '?'))
1505 /* Move the meta bit to the right place for a string. */
1506 c
= (c
& ~CHAR_META
) | 0x80;
1508 error ("Invalid modifier in string");
1512 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1514 /* If purifying, and string starts with \ newline,
1515 return zero instead. This is for doc strings
1516 that we are really going to find in etc/DOC.nn.nn */
1517 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
1518 return make_number (0);
1521 return make_pure_string (read_buffer
, p
- read_buffer
);
1523 return make_string (read_buffer
, p
- read_buffer
);
1528 #ifdef LISP_FLOAT_TYPE
1529 /* If a period is followed by a number, then we should read it
1530 as a floating point number. Otherwise, it denotes a dotted
1532 int next_char
= READCHAR
;
1535 if (! (next_char
>= '0' && next_char
<= '9'))
1542 /* Otherwise, we fall through! Note that the atom-reading loop
1543 below will now loop at least once, assuring that we will not
1544 try to UNREAD two characters in a row. */
1548 if (c
<= 040) goto retry
;
1550 register char *p
= read_buffer
;
1554 register char *end
= read_buffer
+ read_buffer_size
;
1557 !(c
== '\"' || c
== '\'' || c
== ';' || c
== '?'
1558 || c
== '(' || c
== ')'
1559 #ifndef LISP_FLOAT_TYPE
1560 /* If we have floating-point support, then we need
1561 to allow <digits><dot><digits>. */
1563 #endif /* not LISP_FLOAT_TYPE */
1564 || c
== '[' || c
== ']' || c
== '#'
1569 register char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1570 p
+= new - read_buffer
;
1571 read_buffer
+= new - read_buffer
;
1572 end
= read_buffer
+ read_buffer_size
;
1585 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1586 p
+= new - read_buffer
;
1587 read_buffer
+= new - read_buffer
;
1588 /* end = read_buffer + read_buffer_size; */
1595 if (!quoted
&& !uninterned_symbol
)
1598 register Lisp_Object val
;
1600 if (*p1
== '+' || *p1
== '-') p1
++;
1601 /* Is it an integer? */
1604 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
1605 #ifdef LISP_FLOAT_TYPE
1606 /* Integers can have trailing decimal points. */
1607 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
1610 /* It is an integer. */
1612 #ifdef LISP_FLOAT_TYPE
1616 if (sizeof (int) == sizeof (EMACS_INT
))
1617 XSETINT (val
, atoi (read_buffer
));
1618 else if (sizeof (long) == sizeof (EMACS_INT
))
1619 XSETINT (val
, atol (read_buffer
));
1625 #ifdef LISP_FLOAT_TYPE
1626 if (isfloat_string (read_buffer
))
1627 return make_float (atof (read_buffer
));
1631 if (uninterned_symbol
)
1632 return make_symbol (read_buffer
);
1634 return intern (read_buffer
);
1639 #ifdef LISP_FLOAT_TYPE
1654 if (*cp
== '+' || *cp
== '-')
1657 if (*cp
>= '0' && *cp
<= '9')
1660 while (*cp
>= '0' && *cp
<= '9')
1668 if (*cp
>= '0' && *cp
<= '9')
1671 while (*cp
>= '0' && *cp
<= '9')
1678 if (*cp
== '+' || *cp
== '-')
1682 if (*cp
>= '0' && *cp
<= '9')
1685 while (*cp
>= '0' && *cp
<= '9')
1688 return (((*cp
== 0) || (*cp
== ' ') || (*cp
== '\t') || (*cp
== '\n') || (*cp
== '\r') || (*cp
== '\f'))
1689 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
1690 || state
== (DOT_CHAR
|TRAIL_INT
)
1691 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
1692 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
1693 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
1695 #endif /* LISP_FLOAT_TYPE */
1698 read_vector (readcharfun
)
1699 Lisp_Object readcharfun
;
1703 register Lisp_Object
*ptr
;
1704 register Lisp_Object tem
, vector
;
1705 register struct Lisp_Cons
*otem
;
1708 tem
= read_list (1, readcharfun
);
1709 len
= Flength (tem
);
1710 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
1713 size
= XVECTOR (vector
)->size
;
1714 ptr
= XVECTOR (vector
)->contents
;
1715 for (i
= 0; i
< size
; i
++)
1717 ptr
[i
] = read_pure
? Fpurecopy (Fcar (tem
)) : Fcar (tem
);
1725 /* flag = 1 means check for ] to terminate rather than ) and .
1726 flag = -1 means check for starting with defun
1727 and make structure pure. */
1730 read_list (flag
, readcharfun
)
1732 register Lisp_Object readcharfun
;
1734 /* -1 means check next element for defun,
1735 0 means don't check,
1736 1 means already checked and found defun. */
1737 int defunflag
= flag
< 0 ? -1 : 0;
1738 Lisp_Object val
, tail
;
1739 register Lisp_Object elt
, tem
;
1740 struct gcpro gcpro1
, gcpro2
;
1741 /* 0 is the normal case.
1742 1 means this list is a doc reference; replace it with the number 0.
1743 2 means this list is a doc reference; replace it with the doc string. */
1744 int doc_reference
= 0;
1746 /* Initialize this to 1 if we are reading a list. */
1747 int first_in_list
= flag
<= 0;
1756 elt
= read1 (readcharfun
, &ch
, first_in_list
);
1761 /* While building, if the list starts with #$, treat it specially. */
1762 if (EQ (elt
, Vload_file_name
)
1763 && !NILP (Vpurify_flag
))
1765 if (NILP (Vdoc_file_name
))
1766 /* We have not yet called Snarf-documentation, so assume
1767 this file is described in the DOC-MM.NN file
1768 and Snarf-documentation will fill in the right value later.
1769 For now, replace the whole list with 0. */
1772 /* We have already called Snarf-documentation, so make a relative
1773 file name for this file, so it can be found properly
1774 in the installed Lisp directory.
1775 We don't use Fexpand_file_name because that would make
1776 the directory absolute now. */
1777 elt
= concat2 (build_string ("../lisp/"),
1778 Ffile_name_nondirectory (elt
));
1780 else if (EQ (elt
, Vload_file_name
)
1781 && load_force_doc_strings
)
1790 Fsignal (Qinvalid_read_syntax
,
1791 Fcons (make_string (") or . in a vector", 18), Qnil
));
1799 XCONS (tail
)->cdr
= read0 (readcharfun
);
1801 val
= read0 (readcharfun
);
1802 read1 (readcharfun
, &ch
, 0);
1806 if (doc_reference
== 1)
1807 return make_number (0);
1808 if (doc_reference
== 2)
1810 /* Get a doc string from the file we are loading.
1811 If it's in saved_doc_string, get it from there. */
1812 int pos
= XINT (XCONS (val
)->cdr
);
1813 if (pos
>= saved_doc_string_position
1814 && pos
< (saved_doc_string_position
1815 + saved_doc_string_length
))
1817 int start
= pos
- saved_doc_string_position
;
1820 /* Process quoting with ^A,
1821 and find the end of the string,
1822 which is marked with ^_ (037). */
1823 for (from
= start
, to
= start
;
1824 saved_doc_string
[from
] != 037;)
1826 int c
= saved_doc_string
[from
++];
1829 c
= saved_doc_string
[from
++];
1831 saved_doc_string
[to
++] = c
;
1833 saved_doc_string
[to
++] = 0;
1835 saved_doc_string
[to
++] = 037;
1838 saved_doc_string
[to
++] = c
;
1841 return make_string (saved_doc_string
+ start
,
1845 return read_doc_string (val
);
1850 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string (". in wrong context", 18), Qnil
));
1852 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("] in a list", 11), Qnil
));
1854 tem
= (read_pure
&& flag
<= 0
1855 ? pure_cons (elt
, Qnil
)
1856 : Fcons (elt
, Qnil
));
1858 XCONS (tail
)->cdr
= tem
;
1863 defunflag
= EQ (elt
, Qdefun
);
1864 else if (defunflag
> 0)
1869 Lisp_Object Vobarray
;
1870 Lisp_Object initial_obarray
;
1872 /* oblookup stores the bucket number here, for the sake of Funintern. */
1874 int oblookup_last_bucket_number
;
1876 static int hash_string ();
1877 Lisp_Object
oblookup ();
1879 /* Get an error if OBARRAY is not an obarray.
1880 If it is one, return it. */
1883 check_obarray (obarray
)
1884 Lisp_Object obarray
;
1886 while (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1888 /* If Vobarray is now invalid, force it to be valid. */
1889 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
1891 obarray
= wrong_type_argument (Qvectorp
, obarray
);
1896 /* Intern the C string STR: return a symbol with that name,
1897 interned in the current obarray. */
1904 int len
= strlen (str
);
1905 Lisp_Object obarray
;
1908 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1909 obarray
= check_obarray (obarray
);
1910 tem
= oblookup (obarray
, str
, len
);
1913 return Fintern ((!NILP (Vpurify_flag
)
1914 ? make_pure_string (str
, len
)
1915 : make_string (str
, len
)),
1919 /* Create an uninterned symbol with name STR. */
1925 int len
= strlen (str
);
1927 return Fmake_symbol ((!NILP (Vpurify_flag
)
1928 ? make_pure_string (str
, len
)
1929 : make_string (str
, len
)));
1932 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
1933 "Return the canonical symbol whose name is STRING.\n\
1934 If there is none, one is created by this function and returned.\n\
1935 A second optional argument specifies the obarray to use;\n\
1936 it defaults to the value of `obarray'.")
1938 Lisp_Object string
, obarray
;
1940 register Lisp_Object tem
, sym
, *ptr
;
1942 if (NILP (obarray
)) obarray
= Vobarray
;
1943 obarray
= check_obarray (obarray
);
1945 CHECK_STRING (string
, 0);
1947 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1948 if (!INTEGERP (tem
))
1951 if (!NILP (Vpurify_flag
))
1952 string
= Fpurecopy (string
);
1953 sym
= Fmake_symbol (string
);
1954 XSYMBOL (sym
)->obarray
= obarray
;
1956 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
1958 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
1960 XSYMBOL (sym
)->next
= 0;
1965 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
1966 "Return the canonical symbol whose name is STRING, or nil if none exists.\n\
1967 A second optional argument specifies the obarray to use;\n\
1968 it defaults to the value of `obarray'.")
1970 Lisp_Object string
, obarray
;
1972 register Lisp_Object tem
;
1974 if (NILP (obarray
)) obarray
= Vobarray
;
1975 obarray
= check_obarray (obarray
);
1977 CHECK_STRING (string
, 0);
1979 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1980 if (!INTEGERP (tem
))
1985 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
1986 "Delete the symbol named NAME, if any, from OBARRAY.\n\
1987 The value is t if a symbol was found and deleted, nil otherwise.\n\
1988 NAME may be a string or a symbol. If it is a symbol, that symbol\n\
1989 is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\
1990 OBARRAY defaults to the value of the variable `obarray'.")
1992 Lisp_Object name
, obarray
;
1994 register Lisp_Object string
, tem
;
1997 if (NILP (obarray
)) obarray
= Vobarray
;
1998 obarray
= check_obarray (obarray
);
2001 XSETSTRING (string
, XSYMBOL (name
)->name
);
2004 CHECK_STRING (name
, 0);
2008 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
2011 /* If arg was a symbol, don't delete anything but that symbol itself. */
2012 if (SYMBOLP (name
) && !EQ (name
, tem
))
2015 hash
= oblookup_last_bucket_number
;
2017 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
2019 if (XSYMBOL (tem
)->next
)
2020 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
2022 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
2026 Lisp_Object tail
, following
;
2028 for (tail
= XVECTOR (obarray
)->contents
[hash
];
2029 XSYMBOL (tail
)->next
;
2032 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
2033 if (EQ (following
, tem
))
2035 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
2044 /* Return the symbol in OBARRAY whose names matches the string
2045 of SIZE characters at PTR. If there is no such symbol in OBARRAY,
2048 Also store the bucket number in oblookup_last_bucket_number. */
2051 oblookup (obarray
, ptr
, size
)
2052 Lisp_Object obarray
;
2058 register Lisp_Object tail
;
2059 Lisp_Object bucket
, tem
;
2061 if (!VECTORP (obarray
)
2062 || (obsize
= XVECTOR (obarray
)->size
) == 0)
2064 obarray
= check_obarray (obarray
);
2065 obsize
= XVECTOR (obarray
)->size
;
2067 /* This is sometimes needed in the middle of GC. */
2068 obsize
&= ~ARRAY_MARK_FLAG
;
2069 /* Combining next two lines breaks VMS C 2.3. */
2070 hash
= hash_string (ptr
, size
);
2072 bucket
= XVECTOR (obarray
)->contents
[hash
];
2073 oblookup_last_bucket_number
= hash
;
2074 if (XFASTINT (bucket
) == 0)
2076 else if (!SYMBOLP (bucket
))
2077 error ("Bad data in guts of obarray"); /* Like CADR error message */
2079 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
2081 if (XSYMBOL (tail
)->name
->size
== size
2082 && !bcmp (XSYMBOL (tail
)->name
->data
, ptr
, size
))
2084 else if (XSYMBOL (tail
)->next
== 0)
2087 XSETINT (tem
, hash
);
2092 hash_string (ptr
, len
)
2096 register unsigned char *p
= ptr
;
2097 register unsigned char *end
= p
+ len
;
2098 register unsigned char c
;
2099 register int hash
= 0;
2104 if (c
>= 0140) c
-= 40;
2105 hash
= ((hash
<<3) + (hash
>>28) + c
);
2107 return hash
& 07777777777;
2111 map_obarray (obarray
, fn
, arg
)
2112 Lisp_Object obarray
;
2117 register Lisp_Object tail
;
2118 CHECK_VECTOR (obarray
, 1);
2119 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
2121 tail
= XVECTOR (obarray
)->contents
[i
];
2122 if (XFASTINT (tail
) != 0)
2126 if (XSYMBOL (tail
)->next
== 0)
2128 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
2133 mapatoms_1 (sym
, function
)
2134 Lisp_Object sym
, function
;
2136 call1 (function
, sym
);
2139 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
2140 "Call FUNCTION on every symbol in OBARRAY.\n\
2141 OBARRAY defaults to the value of `obarray'.")
2143 Lisp_Object function
, obarray
;
2147 if (NILP (obarray
)) obarray
= Vobarray
;
2148 obarray
= check_obarray (obarray
);
2150 map_obarray (obarray
, mapatoms_1
, function
);
2154 #define OBARRAY_SIZE 1511
2159 Lisp_Object oblength
;
2163 XSETFASTINT (oblength
, OBARRAY_SIZE
);
2165 Qnil
= Fmake_symbol (make_pure_string ("nil", 3));
2166 Vobarray
= Fmake_vector (oblength
, make_number (0));
2167 initial_obarray
= Vobarray
;
2168 staticpro (&initial_obarray
);
2169 /* Intern nil in the obarray */
2170 XSYMBOL (Qnil
)->obarray
= Vobarray
;
2171 /* These locals are to kludge around a pyramid compiler bug. */
2172 hash
= hash_string ("nil", 3);
2173 /* Separate statement here to avoid VAXC bug. */
2174 hash
%= OBARRAY_SIZE
;
2175 tem
= &XVECTOR (Vobarray
)->contents
[hash
];
2178 Qunbound
= Fmake_symbol (make_pure_string ("unbound", 7));
2179 XSYMBOL (Qnil
)->function
= Qunbound
;
2180 XSYMBOL (Qunbound
)->value
= Qunbound
;
2181 XSYMBOL (Qunbound
)->function
= Qunbound
;
2184 XSYMBOL (Qnil
)->value
= Qnil
;
2185 XSYMBOL (Qnil
)->plist
= Qnil
;
2186 XSYMBOL (Qt
)->value
= Qt
;
2188 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
2191 Qvariable_documentation
= intern ("variable-documentation");
2193 read_buffer_size
= 100;
2194 read_buffer
= (char *) malloc (read_buffer_size
);
2199 struct Lisp_Subr
*sname
;
2202 sym
= intern (sname
->symbol_name
);
2203 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2206 #ifdef NOTDEF /* use fset in subr.el now */
2208 defalias (sname
, string
)
2209 struct Lisp_Subr
*sname
;
2213 sym
= intern (string
);
2214 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2218 /* Define an "integer variable"; a symbol whose value is forwarded
2219 to a C variable of type int. Sample call: */
2220 /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */
2222 defvar_int (namestring
, address
)
2226 Lisp_Object sym
, val
;
2227 sym
= intern (namestring
);
2228 val
= allocate_misc ();
2229 XMISCTYPE (val
) = Lisp_Misc_Intfwd
;
2230 XINTFWD (val
)->intvar
= address
;
2231 XSYMBOL (sym
)->value
= val
;
2234 /* Similar but define a variable whose value is T if address contains 1,
2235 NIL if address contains 0 */
2237 defvar_bool (namestring
, address
)
2241 Lisp_Object sym
, val
;
2242 sym
= intern (namestring
);
2243 val
= allocate_misc ();
2244 XMISCTYPE (val
) = Lisp_Misc_Boolfwd
;
2245 XBOOLFWD (val
)->boolvar
= address
;
2246 XSYMBOL (sym
)->value
= val
;
2249 /* Similar but define a variable whose value is the Lisp Object stored
2250 at address. Two versions: with and without gc-marking of the C
2251 variable. The nopro version is used when that variable will be
2252 gc-marked for some other reason, since marking the same slot twice
2253 can cause trouble with strings. */
2255 defvar_lisp_nopro (namestring
, address
)
2257 Lisp_Object
*address
;
2259 Lisp_Object sym
, val
;
2260 sym
= intern (namestring
);
2261 val
= allocate_misc ();
2262 XMISCTYPE (val
) = Lisp_Misc_Objfwd
;
2263 XOBJFWD (val
)->objvar
= address
;
2264 XSYMBOL (sym
)->value
= val
;
2268 defvar_lisp (namestring
, address
)
2270 Lisp_Object
*address
;
2272 defvar_lisp_nopro (namestring
, address
);
2273 staticpro (address
);
2278 /* Similar but define a variable whose value is the Lisp Object stored in
2279 the current buffer. address is the address of the slot in the buffer
2280 that is current now. */
2283 defvar_per_buffer (namestring
, address
, type
, doc
)
2285 Lisp_Object
*address
;
2289 Lisp_Object sym
, val
;
2291 extern struct buffer buffer_local_symbols
;
2293 sym
= intern (namestring
);
2294 val
= allocate_misc ();
2295 offset
= (char *)address
- (char *)current_buffer
;
2297 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
2298 XBUFFER_OBJFWD (val
)->offset
= offset
;
2299 XSYMBOL (sym
)->value
= val
;
2300 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
) = sym
;
2301 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
) = type
;
2302 if (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
)) == 0)
2303 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
2304 slot of buffer_local_flags */
2308 #endif /* standalone */
2310 /* Similar but define a variable whose value is the Lisp Object stored
2311 at a particular offset in the current kboard object. */
2314 defvar_kboard (namestring
, offset
)
2318 Lisp_Object sym
, val
;
2319 sym
= intern (namestring
);
2320 val
= allocate_misc ();
2321 XMISCTYPE (val
) = Lisp_Misc_Kboard_Objfwd
;
2322 XKBOARD_OBJFWD (val
)->offset
= offset
;
2323 XSYMBOL (sym
)->value
= val
;
2326 /* Record the value of load-path used at the start of dumping
2327 so we can see if the site changed it later during dumping. */
2328 static Lisp_Object dump_path
;
2333 int turn_off_warning
= 0;
2335 #ifdef HAVE_SETLOCALE
2336 /* Make sure numbers are parsed as we expect. */
2337 setlocale (LC_NUMERIC
, "C");
2338 #endif /* HAVE_SETLOCALE */
2340 /* Compute the default load-path. */
2342 normal
= PATH_LOADSEARCH
;
2343 Vload_path
= decode_env_path (0, normal
);
2345 if (NILP (Vpurify_flag
))
2346 normal
= PATH_LOADSEARCH
;
2348 normal
= PATH_DUMPLOADSEARCH
;
2350 /* In a dumped Emacs, we normally have to reset the value of
2351 Vload_path from PATH_LOADSEARCH, since the value that was dumped
2352 uses ../lisp, instead of the path of the installed elisp
2353 libraries. However, if it appears that Vload_path was changed
2354 from the default before dumping, don't override that value. */
2357 if (! NILP (Fequal (dump_path
, Vload_path
)))
2359 Vload_path
= decode_env_path (0, normal
);
2360 if (!NILP (Vinstallation_directory
))
2362 /* Add to the path the lisp subdir of the
2363 installation dir, if it exists. */
2364 Lisp_Object tem
, tem1
;
2365 tem
= Fexpand_file_name (build_string ("lisp"),
2366 Vinstallation_directory
);
2367 tem1
= Ffile_exists_p (tem
);
2370 if (NILP (Fmember (tem
, Vload_path
)))
2372 turn_off_warning
= 1;
2373 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2377 /* That dir doesn't exist, so add the build-time
2378 Lisp dirs instead. */
2379 Vload_path
= nconc2 (Vload_path
, dump_path
);
2381 /* Add site-list under the installation dir, if it exists. */
2382 tem
= Fexpand_file_name (build_string ("site-lisp"),
2383 Vinstallation_directory
);
2384 tem1
= Ffile_exists_p (tem
);
2387 if (NILP (Fmember (tem
, Vload_path
)))
2388 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2395 /* ../lisp refers to the build directory.
2396 NORMAL refers to the lisp dir in the source directory. */
2397 Vload_path
= Fcons (build_string ("../lisp"),
2398 decode_env_path (0, normal
));
2399 dump_path
= Vload_path
;
2404 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
2405 almost never correct, thereby causing a warning to be printed out that
2406 confuses users. Since PATH_LOADSEARCH is always overridden by the
2407 EMACSLOADPATH environment variable below, disable the warning on NT. */
2409 /* Warn if dirs in the *standard* path don't exist. */
2410 if (!turn_off_warning
)
2412 Lisp_Object path_tail
;
2414 for (path_tail
= Vload_path
;
2416 path_tail
= XCONS (path_tail
)->cdr
)
2418 Lisp_Object dirfile
;
2419 dirfile
= Fcar (path_tail
);
2420 if (STRINGP (dirfile
))
2422 dirfile
= Fdirectory_file_name (dirfile
);
2423 if (access (XSTRING (dirfile
)->data
, 0) < 0)
2425 "Warning: Lisp directory `%s' does not exist.\n",
2426 XSTRING (Fcar (path_tail
))->data
);
2430 #endif /* WINDOWSNT */
2432 /* If the EMACSLOADPATH environment variable is set, use its value.
2433 This doesn't apply if we're dumping. */
2435 if (NILP (Vpurify_flag
)
2436 && egetenv ("EMACSLOADPATH"))
2438 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
2442 load_in_progress
= 0;
2443 Vload_file_name
= Qnil
;
2445 load_descriptor_list
= Qnil
;
2452 defsubr (&Sread_from_string
);
2454 defsubr (&Sintern_soft
);
2455 defsubr (&Sunintern
);
2457 defsubr (&Seval_buffer
);
2458 defsubr (&Seval_region
);
2459 defsubr (&Sread_char
);
2460 defsubr (&Sread_char_exclusive
);
2461 defsubr (&Sread_event
);
2462 defsubr (&Sget_file_char
);
2463 defsubr (&Smapatoms
);
2465 DEFVAR_LISP ("obarray", &Vobarray
,
2466 "Symbol table for use by `intern' and `read'.\n\
2467 It is a vector whose length ought to be prime for best results.\n\
2468 The vector's contents don't make sense if examined from Lisp programs;\n\
2469 to find all the symbols in an obarray, use `mapatoms'.");
2471 DEFVAR_LISP ("values", &Vvalues
,
2472 "List of values of all expressions which were read, evaluated and printed.\n\
2473 Order is reverse chronological.");
2475 DEFVAR_LISP ("standard-input", &Vstandard_input
,
2476 "Stream for read to get input from.\n\
2477 See documentation of `read' for possible values.");
2478 Vstandard_input
= Qt
;
2480 DEFVAR_LISP ("load-path", &Vload_path
,
2481 "*List of directories to search for files to load.\n\
2482 Each element is a string (directory name) or nil (try default directory).\n\
2483 Initialized based on EMACSLOADPATH environment variable, if any,\n\
2484 otherwise to default specified by file `paths.h' when Emacs was built.");
2486 DEFVAR_BOOL ("load-in-progress", &load_in_progress
,
2487 "Non-nil iff inside of `load'.");
2489 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist
,
2490 "An alist of expressions to be evalled when particular files are loaded.\n\
2491 Each element looks like (FILENAME FORMS...).\n\
2492 When `load' is run and the file-name argument is FILENAME,\n\
2493 the FORMS in the corresponding element are executed at the end of loading.\n\n\
2494 FILENAME must match exactly! Normally FILENAME is the name of a library,\n\
2495 with no directory specified, since that is how `load' is normally called.\n\
2496 An error in FORMS does not undo the load,\n\
2497 but does prevent execution of the rest of the FORMS.");
2498 Vafter_load_alist
= Qnil
;
2500 DEFVAR_LISP ("load-history", &Vload_history
,
2501 "Alist mapping source file names to symbols and features.\n\
2502 Each alist element is a list that starts with a file name,\n\
2503 except for one element (optional) that starts with nil and describes\n\
2504 definitions evaluated from buffers not visiting files.\n\
2505 The remaining elements of each list are symbols defined as functions\n\
2506 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
2507 Vload_history
= Qnil
;
2509 DEFVAR_LISP ("load-file-name", &Vload_file_name
,
2510 "Full name of file being loaded by `load'.");
2511 Vload_file_name
= Qnil
;
2513 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list
,
2514 "Used for internal purposes by `load'.");
2515 Vcurrent_load_list
= Qnil
;
2517 DEFVAR_LISP ("load-read-function", &Vload_read_function
,
2518 "Function used by `load' and `eval-region' for reading expressions.\n\
2519 The default is nil, which means use the function `read'.");
2520 Vload_read_function
= Qnil
;
2522 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings
,
2523 "Non-nil means `load' should force-load all dynamic doc strings.\n\
2524 This is useful when the file being loaded is a temporary copy.");
2525 load_force_doc_strings
= 0;
2527 DEFVAR_LISP ("source-directory", &Vsource_directory
,
2528 "Directory in which Emacs sources were found when Emacs was built.\n\
2529 You cannot count on them to still be there!");
2531 = Fexpand_file_name (build_string ("../"),
2532 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
2534 /* Vsource_directory was initialized in init_lread. */
2536 load_descriptor_list
= Qnil
;
2537 staticpro (&load_descriptor_list
);
2539 Qcurrent_load_list
= intern ("current-load-list");
2540 staticpro (&Qcurrent_load_list
);
2542 Qstandard_input
= intern ("standard-input");
2543 staticpro (&Qstandard_input
);
2545 Qread_char
= intern ("read-char");
2546 staticpro (&Qread_char
);
2548 Qget_file_char
= intern ("get-file-char");
2549 staticpro (&Qget_file_char
);
2551 Qbackquote
= intern ("`");
2552 staticpro (&Qbackquote
);
2553 Qcomma
= intern (",");
2554 staticpro (&Qcomma
);
2555 Qcomma_at
= intern (",@");
2556 staticpro (&Qcomma_at
);
2557 Qcomma_dot
= intern (",.");
2558 staticpro (&Qcomma_dot
);
2560 Qascii_character
= intern ("ascii-character");
2561 staticpro (&Qascii_character
);
2563 Qfunction
= intern ("function");
2564 staticpro (&Qfunction
);
2566 Qload
= intern ("load");
2569 Qload_file_name
= intern ("load-file-name");
2570 staticpro (&Qload_file_name
);
2572 staticpro (&dump_path
);
2574 staticpro (&read_objects
);
2575 read_objects
= Qnil
;