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
, Qfunction
;
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
);
1189 tmp
= read_vector (readcharfun
);
1190 if (XVECTOR (tmp
)->size
< CHAR_TABLE_STANDARD_SLOTS
1191 || XVECTOR (tmp
)->size
> CHAR_TABLE_STANDARD_SLOTS
+ 10)
1192 error ("Invalid size char-table");
1193 XSETCHAR_TABLE (tmp
, XCHAR_TABLE (tmp
));
1196 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#^", 2), Qnil
));
1201 length
= read1 (readcharfun
, pch
, first_in_list
);
1205 Lisp_Object tmp
, val
;
1206 int bits_per_char
= INTBITS
/ sizeof (int);
1207 int size_in_chars
= ((XFASTINT (length
) + bits_per_char
)
1211 tmp
= read1 (readcharfun
, pch
, first_in_list
);
1212 if (size_in_chars
!= XSTRING (tmp
)->size
)
1213 Fsignal (Qinvalid_read_syntax
,
1214 Fcons (make_string ("#&", 2), Qnil
));
1216 val
= Fmake_bool_vector (length
, Qnil
);
1217 bcopy (XSTRING (tmp
)->data
, XBOOL_VECTOR (val
)->data
,
1221 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#&", 2), Qnil
));
1225 /* Accept compiled functions at read-time so that we don't have to
1226 build them using function calls. */
1228 tmp
= read_vector (readcharfun
);
1229 return Fmake_byte_code (XVECTOR (tmp
)->size
,
1230 XVECTOR (tmp
)->contents
);
1232 #ifdef USE_TEXT_PROPERTIES
1236 struct gcpro gcpro1
;
1239 /* Read the string itself. */
1240 tmp
= read1 (readcharfun
, &ch
, 0);
1241 if (ch
!= 0 || !STRINGP (tmp
))
1242 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1244 /* Read the intervals and their properties. */
1247 Lisp_Object beg
, end
, plist
;
1249 beg
= read1 (readcharfun
, &ch
, 0);
1253 end
= read1 (readcharfun
, &ch
, 0);
1255 plist
= read1 (readcharfun
, &ch
, 0);
1257 Fsignal (Qinvalid_read_syntax
,
1258 Fcons (build_string ("invalid string property list"),
1260 Fset_text_properties (beg
, end
, plist
, tmp
);
1266 /* #@NUMBER is used to skip NUMBER following characters.
1267 That's used in .elc files to skip over doc strings
1268 and function definitions. */
1273 /* Read a decimal integer. */
1274 while ((c
= READCHAR
) >= 0
1275 && c
>= '0' && c
<= '9')
1283 #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */
1284 if (load_force_doc_strings
&& EQ (readcharfun
, Qget_file_char
))
1286 /* If we are supposed to force doc strings into core right now,
1287 record the last string that we skipped,
1288 and record where in the file it comes from. */
1289 if (saved_doc_string_size
== 0)
1291 saved_doc_string_size
= nskip
+ 100;
1292 saved_doc_string
= (char *) malloc (saved_doc_string_size
);
1294 if (nskip
> saved_doc_string_size
)
1296 saved_doc_string_size
= nskip
+ 100;
1297 saved_doc_string
= (char *) realloc (saved_doc_string
,
1298 saved_doc_string_size
);
1301 saved_doc_string_position
= ftell (instream
);
1303 /* Copy that many characters into saved_doc_string. */
1304 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1305 saved_doc_string
[i
] = c
= READCHAR
;
1307 saved_doc_string_length
= i
;
1310 #endif /* not DOS_NT */
1312 /* Skip that many characters. */
1313 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1319 return Vload_file_name
;
1321 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
1325 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1328 while ((c
= READCHAR
) >= 0 && c
!= '\n');
1333 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
1343 new_backquote_flag
= 1;
1344 value
= read0 (readcharfun
);
1345 new_backquote_flag
= 0;
1347 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
1351 if (new_backquote_flag
)
1353 Lisp_Object comma_type
= Qnil
;
1358 comma_type
= Qcomma_at
;
1360 comma_type
= Qcomma_dot
;
1363 if (ch
>= 0) UNREAD (ch
);
1364 comma_type
= Qcomma
;
1367 new_backquote_flag
= 0;
1368 value
= read0 (readcharfun
);
1369 new_backquote_flag
= 1;
1370 return Fcons (comma_type
, Fcons (value
, Qnil
));
1377 register Lisp_Object val
;
1380 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1383 XSETINT (val
, read_escape (readcharfun
));
1392 register char *p
= read_buffer
;
1393 register char *end
= read_buffer
+ read_buffer_size
;
1397 while ((c
= READCHAR
) >= 0
1402 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1403 p
+= new - read_buffer
;
1404 read_buffer
+= new - read_buffer
;
1405 end
= read_buffer
+ read_buffer_size
;
1408 c
= read_escape (readcharfun
);
1409 /* c is -1 if \ newline has just been seen */
1412 if (p
== read_buffer
)
1417 /* Allow `\C- ' and `\C-?'. */
1418 if (c
== (CHAR_CTL
| ' '))
1420 else if (c
== (CHAR_CTL
| '?'))
1424 /* Move the meta bit to the right place for a string. */
1425 c
= (c
& ~CHAR_META
) | 0x80;
1427 error ("Invalid modifier in string");
1431 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1433 /* If purifying, and string starts with \ newline,
1434 return zero instead. This is for doc strings
1435 that we are really going to find in etc/DOC.nn.nn */
1436 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
1437 return make_number (0);
1440 return make_pure_string (read_buffer
, p
- read_buffer
);
1442 return make_string (read_buffer
, p
- read_buffer
);
1447 #ifdef LISP_FLOAT_TYPE
1448 /* If a period is followed by a number, then we should read it
1449 as a floating point number. Otherwise, it denotes a dotted
1451 int next_char
= READCHAR
;
1454 if (! (next_char
>= '0' && next_char
<= '9'))
1461 /* Otherwise, we fall through! Note that the atom-reading loop
1462 below will now loop at least once, assuring that we will not
1463 try to UNREAD two characters in a row. */
1467 if (c
<= 040) goto retry
;
1469 register char *p
= read_buffer
;
1473 register char *end
= read_buffer
+ read_buffer_size
;
1476 !(c
== '\"' || c
== '\'' || c
== ';' || c
== '?'
1477 || c
== '(' || c
== ')'
1478 #ifndef LISP_FLOAT_TYPE
1479 /* If we have floating-point support, then we need
1480 to allow <digits><dot><digits>. */
1482 #endif /* not LISP_FLOAT_TYPE */
1483 || c
== '[' || c
== ']' || c
== '#'
1488 register char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1489 p
+= new - read_buffer
;
1490 read_buffer
+= new - read_buffer
;
1491 end
= read_buffer
+ read_buffer_size
;
1504 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1505 p
+= new - read_buffer
;
1506 read_buffer
+= new - read_buffer
;
1507 /* end = read_buffer + read_buffer_size; */
1517 register Lisp_Object val
;
1519 if (*p1
== '+' || *p1
== '-') p1
++;
1520 /* Is it an integer? */
1523 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
1524 #ifdef LISP_FLOAT_TYPE
1525 /* Integers can have trailing decimal points. */
1526 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
1529 /* It is an integer. */
1531 #ifdef LISP_FLOAT_TYPE
1535 if (sizeof (int) == sizeof (EMACS_INT
))
1536 XSETINT (val
, atoi (read_buffer
));
1537 else if (sizeof (long) == sizeof (EMACS_INT
))
1538 XSETINT (val
, atol (read_buffer
));
1544 #ifdef LISP_FLOAT_TYPE
1545 if (isfloat_string (read_buffer
))
1546 return make_float (atof (read_buffer
));
1550 return intern (read_buffer
);
1555 #ifdef LISP_FLOAT_TYPE
1570 if (*cp
== '+' || *cp
== '-')
1573 if (*cp
>= '0' && *cp
<= '9')
1576 while (*cp
>= '0' && *cp
<= '9')
1584 if (*cp
>= '0' && *cp
<= '9')
1587 while (*cp
>= '0' && *cp
<= '9')
1594 if (*cp
== '+' || *cp
== '-')
1598 if (*cp
>= '0' && *cp
<= '9')
1601 while (*cp
>= '0' && *cp
<= '9')
1604 return (((*cp
== 0) || (*cp
== ' ') || (*cp
== '\t') || (*cp
== '\n') || (*cp
== '\r') || (*cp
== '\f'))
1605 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
1606 || state
== (DOT_CHAR
|TRAIL_INT
)
1607 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
1608 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
1609 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
1611 #endif /* LISP_FLOAT_TYPE */
1614 read_vector (readcharfun
)
1615 Lisp_Object readcharfun
;
1619 register Lisp_Object
*ptr
;
1620 register Lisp_Object tem
, vector
;
1621 register struct Lisp_Cons
*otem
;
1624 tem
= read_list (1, readcharfun
);
1625 len
= Flength (tem
);
1626 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
1629 size
= XVECTOR (vector
)->size
;
1630 ptr
= XVECTOR (vector
)->contents
;
1631 for (i
= 0; i
< size
; i
++)
1633 ptr
[i
] = read_pure
? Fpurecopy (Fcar (tem
)) : Fcar (tem
);
1641 /* flag = 1 means check for ] to terminate rather than ) and .
1642 flag = -1 means check for starting with defun
1643 and make structure pure. */
1646 read_list (flag
, readcharfun
)
1648 register Lisp_Object readcharfun
;
1650 /* -1 means check next element for defun,
1651 0 means don't check,
1652 1 means already checked and found defun. */
1653 int defunflag
= flag
< 0 ? -1 : 0;
1654 Lisp_Object val
, tail
;
1655 register Lisp_Object elt
, tem
;
1656 struct gcpro gcpro1
, gcpro2
;
1657 /* 0 is the normal case.
1658 1 means this list is a doc reference; replace it with the number 0.
1659 2 means this list is a doc reference; replace it with the doc string. */
1660 int doc_reference
= 0;
1662 /* Initialize this to 1 if we are reading a list. */
1663 int first_in_list
= flag
<= 0;
1672 elt
= read1 (readcharfun
, &ch
, first_in_list
);
1677 /* While building, if the list starts with #$, treat it specially. */
1678 if (EQ (elt
, Vload_file_name
)
1679 && !NILP (Vpurify_flag
))
1681 if (NILP (Vdoc_file_name
))
1682 /* We have not yet called Snarf-documentation, so assume
1683 this file is described in the DOC-MM.NN file
1684 and Snarf-documentation will fill in the right value later.
1685 For now, replace the whole list with 0. */
1688 /* We have already called Snarf-documentation, so make a relative
1689 file name for this file, so it can be found properly
1690 in the installed Lisp directory.
1691 We don't use Fexpand_file_name because that would make
1692 the directory absolute now. */
1693 elt
= concat2 (build_string ("../lisp/"),
1694 Ffile_name_nondirectory (elt
));
1696 else if (EQ (elt
, Vload_file_name
)
1697 && load_force_doc_strings
)
1706 Fsignal (Qinvalid_read_syntax
,
1707 Fcons (make_string (") or . in a vector", 18), Qnil
));
1715 XCONS (tail
)->cdr
= read0 (readcharfun
);
1717 val
= read0 (readcharfun
);
1718 read1 (readcharfun
, &ch
, 0);
1722 if (doc_reference
== 1)
1723 return make_number (0);
1724 if (doc_reference
== 2)
1726 /* Get a doc string from the file we are loading.
1727 If it's in saved_doc_string, get it from there. */
1728 int pos
= XINT (XCONS (val
)->cdr
);
1729 if (pos
>= saved_doc_string_position
1730 && pos
< (saved_doc_string_position
1731 + saved_doc_string_length
))
1733 int start
= pos
- saved_doc_string_position
;
1736 /* Process quoting with ^A,
1737 and find the end of the string,
1738 which is marked with ^_ (037). */
1739 for (from
= start
, to
= start
;
1740 saved_doc_string
[from
] != 037;)
1742 int c
= saved_doc_string
[from
++];
1745 c
= saved_doc_string
[from
++];
1747 saved_doc_string
[to
++] = c
;
1749 saved_doc_string
[to
++] = 0;
1751 saved_doc_string
[to
++] = 037;
1754 saved_doc_string
[to
++] = c
;
1757 return make_string (saved_doc_string
+ start
,
1761 return read_doc_string (val
);
1766 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string (". in wrong context", 18), Qnil
));
1768 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("] in a list", 11), Qnil
));
1770 tem
= (read_pure
&& flag
<= 0
1771 ? pure_cons (elt
, Qnil
)
1772 : Fcons (elt
, Qnil
));
1774 XCONS (tail
)->cdr
= tem
;
1779 defunflag
= EQ (elt
, Qdefun
);
1780 else if (defunflag
> 0)
1785 Lisp_Object Vobarray
;
1786 Lisp_Object initial_obarray
;
1788 /* oblookup stores the bucket number here, for the sake of Funintern. */
1790 int oblookup_last_bucket_number
;
1792 static int hash_string ();
1793 Lisp_Object
oblookup ();
1795 /* Get an error if OBARRAY is not an obarray.
1796 If it is one, return it. */
1799 check_obarray (obarray
)
1800 Lisp_Object obarray
;
1802 while (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1804 /* If Vobarray is now invalid, force it to be valid. */
1805 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
1807 obarray
= wrong_type_argument (Qvectorp
, obarray
);
1812 /* Intern the C string STR: return a symbol with that name,
1813 interned in the current obarray. */
1820 int len
= strlen (str
);
1821 Lisp_Object obarray
;
1824 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1825 obarray
= check_obarray (obarray
);
1826 tem
= oblookup (obarray
, str
, len
);
1829 return Fintern ((!NILP (Vpurify_flag
)
1830 ? make_pure_string (str
, len
)
1831 : make_string (str
, len
)),
1835 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
1836 "Return the canonical symbol whose name is STRING.\n\
1837 If there is none, one is created by this function and returned.\n\
1838 A second optional argument specifies the obarray to use;\n\
1839 it defaults to the value of `obarray'.")
1841 Lisp_Object str
, obarray
;
1843 register Lisp_Object tem
, sym
, *ptr
;
1845 if (NILP (obarray
)) obarray
= Vobarray
;
1846 obarray
= check_obarray (obarray
);
1848 CHECK_STRING (str
, 0);
1850 tem
= oblookup (obarray
, XSTRING (str
)->data
, XSTRING (str
)->size
);
1851 if (!INTEGERP (tem
))
1854 if (!NILP (Vpurify_flag
))
1855 str
= Fpurecopy (str
);
1856 sym
= Fmake_symbol (str
);
1858 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
1860 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
1862 XSYMBOL (sym
)->next
= 0;
1867 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
1868 "Return the canonical symbol whose name is STRING, or nil if none exists.\n\
1869 A second optional argument specifies the obarray to use;\n\
1870 it defaults to the value of `obarray'.")
1872 Lisp_Object str
, obarray
;
1874 register Lisp_Object tem
;
1876 if (NILP (obarray
)) obarray
= Vobarray
;
1877 obarray
= check_obarray (obarray
);
1879 CHECK_STRING (str
, 0);
1881 tem
= oblookup (obarray
, XSTRING (str
)->data
, XSTRING (str
)->size
);
1882 if (!INTEGERP (tem
))
1887 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
1888 "Delete the symbol named NAME, if any, from OBARRAY.\n\
1889 The value is t if a symbol was found and deleted, nil otherwise.\n\
1890 NAME may be a string or a symbol. If it is a symbol, that symbol\n\
1891 is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\
1892 OBARRAY defaults to the value of the variable `obarray'.")
1894 Lisp_Object name
, obarray
;
1896 register Lisp_Object string
, tem
;
1899 if (NILP (obarray
)) obarray
= Vobarray
;
1900 obarray
= check_obarray (obarray
);
1903 XSETSTRING (string
, XSYMBOL (name
)->name
);
1906 CHECK_STRING (name
, 0);
1910 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1913 /* If arg was a symbol, don't delete anything but that symbol itself. */
1914 if (SYMBOLP (name
) && !EQ (name
, tem
))
1917 hash
= oblookup_last_bucket_number
;
1919 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
1921 if (XSYMBOL (tem
)->next
)
1922 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
1924 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
1928 Lisp_Object tail
, following
;
1930 for (tail
= XVECTOR (obarray
)->contents
[hash
];
1931 XSYMBOL (tail
)->next
;
1934 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
1935 if (EQ (following
, tem
))
1937 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
1946 /* Return the symbol in OBARRAY whose names matches the string
1947 of SIZE characters at PTR. If there is no such symbol in OBARRAY,
1950 Also store the bucket number in oblookup_last_bucket_number. */
1953 oblookup (obarray
, ptr
, size
)
1954 Lisp_Object obarray
;
1960 register Lisp_Object tail
;
1961 Lisp_Object bucket
, tem
;
1963 if (!VECTORP (obarray
)
1964 || (obsize
= XVECTOR (obarray
)->size
) == 0)
1966 obarray
= check_obarray (obarray
);
1967 obsize
= XVECTOR (obarray
)->size
;
1969 /* Combining next two lines breaks VMS C 2.3. */
1970 hash
= hash_string (ptr
, size
);
1972 bucket
= XVECTOR (obarray
)->contents
[hash
];
1973 oblookup_last_bucket_number
= hash
;
1974 if (XFASTINT (bucket
) == 0)
1976 else if (!SYMBOLP (bucket
))
1977 error ("Bad data in guts of obarray"); /* Like CADR error message */
1979 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
1981 if (XSYMBOL (tail
)->name
->size
== size
1982 && !bcmp (XSYMBOL (tail
)->name
->data
, ptr
, size
))
1984 else if (XSYMBOL (tail
)->next
== 0)
1987 XSETINT (tem
, hash
);
1992 hash_string (ptr
, len
)
1996 register unsigned char *p
= ptr
;
1997 register unsigned char *end
= p
+ len
;
1998 register unsigned char c
;
1999 register int hash
= 0;
2004 if (c
>= 0140) c
-= 40;
2005 hash
= ((hash
<<3) + (hash
>>28) + c
);
2007 return hash
& 07777777777;
2011 map_obarray (obarray
, fn
, arg
)
2012 Lisp_Object obarray
;
2017 register Lisp_Object tail
;
2018 CHECK_VECTOR (obarray
, 1);
2019 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
2021 tail
= XVECTOR (obarray
)->contents
[i
];
2022 if (XFASTINT (tail
) != 0)
2026 if (XSYMBOL (tail
)->next
== 0)
2028 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
2033 mapatoms_1 (sym
, function
)
2034 Lisp_Object sym
, function
;
2036 call1 (function
, sym
);
2039 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
2040 "Call FUNCTION on every symbol in OBARRAY.\n\
2041 OBARRAY defaults to the value of `obarray'.")
2043 Lisp_Object function
, obarray
;
2047 if (NILP (obarray
)) obarray
= Vobarray
;
2048 obarray
= check_obarray (obarray
);
2050 map_obarray (obarray
, mapatoms_1
, function
);
2054 #define OBARRAY_SIZE 1511
2059 Lisp_Object oblength
;
2063 XSETFASTINT (oblength
, OBARRAY_SIZE
);
2065 Qnil
= Fmake_symbol (make_pure_string ("nil", 3));
2066 Vobarray
= Fmake_vector (oblength
, make_number (0));
2067 initial_obarray
= Vobarray
;
2068 staticpro (&initial_obarray
);
2069 /* Intern nil in the obarray */
2070 /* These locals are to kludge around a pyramid compiler bug. */
2071 hash
= hash_string ("nil", 3);
2072 /* Separate statement here to avoid VAXC bug. */
2073 hash
%= OBARRAY_SIZE
;
2074 tem
= &XVECTOR (Vobarray
)->contents
[hash
];
2077 Qunbound
= Fmake_symbol (make_pure_string ("unbound", 7));
2078 XSYMBOL (Qnil
)->function
= Qunbound
;
2079 XSYMBOL (Qunbound
)->value
= Qunbound
;
2080 XSYMBOL (Qunbound
)->function
= Qunbound
;
2083 XSYMBOL (Qnil
)->value
= Qnil
;
2084 XSYMBOL (Qnil
)->plist
= Qnil
;
2085 XSYMBOL (Qt
)->value
= Qt
;
2087 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
2090 Qvariable_documentation
= intern ("variable-documentation");
2092 read_buffer_size
= 100;
2093 read_buffer
= (char *) malloc (read_buffer_size
);
2098 struct Lisp_Subr
*sname
;
2101 sym
= intern (sname
->symbol_name
);
2102 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2105 #ifdef NOTDEF /* use fset in subr.el now */
2107 defalias (sname
, string
)
2108 struct Lisp_Subr
*sname
;
2112 sym
= intern (string
);
2113 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2117 /* Define an "integer variable"; a symbol whose value is forwarded
2118 to a C variable of type int. Sample call: */
2119 /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */
2121 defvar_int (namestring
, address
)
2125 Lisp_Object sym
, val
;
2126 sym
= intern (namestring
);
2127 val
= allocate_misc ();
2128 XMISCTYPE (val
) = Lisp_Misc_Intfwd
;
2129 XINTFWD (val
)->intvar
= address
;
2130 XSYMBOL (sym
)->value
= val
;
2133 /* Similar but define a variable whose value is T if address contains 1,
2134 NIL if address contains 0 */
2136 defvar_bool (namestring
, address
)
2140 Lisp_Object sym
, val
;
2141 sym
= intern (namestring
);
2142 val
= allocate_misc ();
2143 XMISCTYPE (val
) = Lisp_Misc_Boolfwd
;
2144 XBOOLFWD (val
)->boolvar
= address
;
2145 XSYMBOL (sym
)->value
= val
;
2148 /* Similar but define a variable whose value is the Lisp Object stored
2149 at address. Two versions: with and without gc-marking of the C
2150 variable. The nopro version is used when that variable will be
2151 gc-marked for some other reason, since marking the same slot twice
2152 can cause trouble with strings. */
2154 defvar_lisp_nopro (namestring
, address
)
2156 Lisp_Object
*address
;
2158 Lisp_Object sym
, val
;
2159 sym
= intern (namestring
);
2160 val
= allocate_misc ();
2161 XMISCTYPE (val
) = Lisp_Misc_Objfwd
;
2162 XOBJFWD (val
)->objvar
= address
;
2163 XSYMBOL (sym
)->value
= val
;
2167 defvar_lisp (namestring
, address
)
2169 Lisp_Object
*address
;
2171 defvar_lisp_nopro (namestring
, address
);
2172 staticpro (address
);
2177 /* Similar but define a variable whose value is the Lisp Object stored in
2178 the current buffer. address is the address of the slot in the buffer
2179 that is current now. */
2182 defvar_per_buffer (namestring
, address
, type
, doc
)
2184 Lisp_Object
*address
;
2188 Lisp_Object sym
, val
;
2190 extern struct buffer buffer_local_symbols
;
2192 sym
= intern (namestring
);
2193 val
= allocate_misc ();
2194 offset
= (char *)address
- (char *)current_buffer
;
2196 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
2197 XBUFFER_OBJFWD (val
)->offset
= offset
;
2198 XSYMBOL (sym
)->value
= val
;
2199 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
) = sym
;
2200 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
) = type
;
2201 if (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
)) == 0)
2202 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
2203 slot of buffer_local_flags */
2207 #endif /* standalone */
2209 /* Similar but define a variable whose value is the Lisp Object stored
2210 at a particular offset in the current kboard object. */
2213 defvar_kboard (namestring
, offset
)
2217 Lisp_Object sym
, val
;
2218 sym
= intern (namestring
);
2219 val
= allocate_misc ();
2220 XMISCTYPE (val
) = Lisp_Misc_Kboard_Objfwd
;
2221 XKBOARD_OBJFWD (val
)->offset
= offset
;
2222 XSYMBOL (sym
)->value
= val
;
2228 int turn_off_warning
= 0;
2230 /* Compute the default load-path. */
2232 normal
= PATH_LOADSEARCH
;
2233 Vload_path
= decode_env_path (0, normal
);
2235 if (NILP (Vpurify_flag
))
2236 normal
= PATH_LOADSEARCH
;
2238 normal
= PATH_DUMPLOADSEARCH
;
2240 /* In a dumped Emacs, we normally have to reset the value of
2241 Vload_path from PATH_LOADSEARCH, since the value that was dumped
2242 uses ../lisp, instead of the path of the installed elisp
2243 libraries. However, if it appears that Vload_path was changed
2244 from the default before dumping, don't override that value. */
2247 Lisp_Object dump_path
;
2249 dump_path
= decode_env_path (0, PATH_DUMPLOADSEARCH
);
2250 if (! NILP (Fequal (dump_path
, Vload_path
)))
2252 Vload_path
= decode_env_path (0, normal
);
2253 if (!NILP (Vinstallation_directory
))
2255 /* Add to the path the lisp subdir of the
2256 installation dir, if it exists. */
2257 Lisp_Object tem
, tem1
;
2258 tem
= Fexpand_file_name (build_string ("lisp"),
2259 Vinstallation_directory
);
2260 tem1
= Ffile_exists_p (tem
);
2263 if (NILP (Fmember (tem
, Vload_path
)))
2265 turn_off_warning
= 1;
2266 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2270 /* That dir doesn't exist, so add the build-time
2271 Lisp dirs instead. */
2272 Vload_path
= nconc2 (Vload_path
, dump_path
);
2274 /* Add site-list under the installation dir, if it exists. */
2275 tem
= Fexpand_file_name (build_string ("site-lisp"),
2276 Vinstallation_directory
);
2277 tem1
= Ffile_exists_p (tem
);
2280 if (NILP (Fmember (tem
, Vload_path
)))
2281 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2287 Vload_path
= decode_env_path (0, normal
);
2291 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
2292 almost never correct, thereby causing a warning to be printed out that
2293 confuses users. Since PATH_LOADSEARCH is always overriden by the
2294 EMACSLOADPATH environment variable below, disable the warning on NT. */
2296 /* Warn if dirs in the *standard* path don't exist. */
2297 if (!turn_off_warning
)
2299 Lisp_Object path_tail
;
2301 for (path_tail
= Vload_path
;
2303 path_tail
= XCONS (path_tail
)->cdr
)
2305 Lisp_Object dirfile
;
2306 dirfile
= Fcar (path_tail
);
2307 if (STRINGP (dirfile
))
2309 dirfile
= Fdirectory_file_name (dirfile
);
2310 if (access (XSTRING (dirfile
)->data
, 0) < 0)
2312 "Warning: Lisp directory `%s' does not exist.\n",
2313 XSTRING (Fcar (path_tail
))->data
);
2317 #endif /* WINDOWSNT */
2319 /* If the EMACSLOADPATH environment variable is set, use its value.
2320 This doesn't apply if we're dumping. */
2322 if (NILP (Vpurify_flag
)
2323 && egetenv ("EMACSLOADPATH"))
2325 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
2329 load_in_progress
= 0;
2331 load_descriptor_list
= Qnil
;
2338 defsubr (&Sread_from_string
);
2340 defsubr (&Sintern_soft
);
2341 defsubr (&Sunintern
);
2343 defsubr (&Seval_buffer
);
2344 defsubr (&Seval_region
);
2345 defsubr (&Sread_char
);
2346 defsubr (&Sread_char_exclusive
);
2347 defsubr (&Sread_event
);
2348 defsubr (&Sget_file_char
);
2349 defsubr (&Smapatoms
);
2351 DEFVAR_LISP ("obarray", &Vobarray
,
2352 "Symbol table for use by `intern' and `read'.\n\
2353 It is a vector whose length ought to be prime for best results.\n\
2354 The vector's contents don't make sense if examined from Lisp programs;\n\
2355 to find all the symbols in an obarray, use `mapatoms'.");
2357 DEFVAR_LISP ("values", &Vvalues
,
2358 "List of values of all expressions which were read, evaluated and printed.\n\
2359 Order is reverse chronological.");
2361 DEFVAR_LISP ("standard-input", &Vstandard_input
,
2362 "Stream for read to get input from.\n\
2363 See documentation of `read' for possible values.");
2364 Vstandard_input
= Qt
;
2366 DEFVAR_LISP ("load-path", &Vload_path
,
2367 "*List of directories to search for files to load.\n\
2368 Each element is a string (directory name) or nil (try default directory).\n\
2369 Initialized based on EMACSLOADPATH environment variable, if any,\n\
2370 otherwise to default specified by file `paths.h' when Emacs was built.");
2372 DEFVAR_BOOL ("load-in-progress", &load_in_progress
,
2373 "Non-nil iff inside of `load'.");
2375 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist
,
2376 "An alist of expressions to be evalled when particular files are loaded.\n\
2377 Each element looks like (FILENAME FORMS...).\n\
2378 When `load' is run and the file-name argument is FILENAME,\n\
2379 the FORMS in the corresponding element are executed at the end of loading.\n\n\
2380 FILENAME must match exactly! Normally FILENAME is the name of a library,\n\
2381 with no directory specified, since that is how `load' is normally called.\n\
2382 An error in FORMS does not undo the load,\n\
2383 but does prevent execution of the rest of the FORMS.");
2384 Vafter_load_alist
= Qnil
;
2386 DEFVAR_LISP ("load-history", &Vload_history
,
2387 "Alist mapping source file names to symbols and features.\n\
2388 Each alist element is a list that starts with a file name,\n\
2389 except for one element (optional) that starts with nil and describes\n\
2390 definitions evaluated from buffers not visiting files.\n\
2391 The remaining elements of each list are symbols defined as functions\n\
2392 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
2393 Vload_history
= Qnil
;
2395 DEFVAR_LISP ("load-file-name", &Vload_file_name
,
2396 "Full name of file being loaded by `load'.");
2397 Vload_file_name
= Qnil
;
2399 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list
,
2400 "Used for internal purposes by `load'.");
2401 Vcurrent_load_list
= Qnil
;
2403 DEFVAR_LISP ("load-read-function", &Vload_read_function
,
2404 "Function used by `load' and `eval-region' for reading expressions.\n\
2405 The default is nil, which means use the function `read'.");
2406 Vload_read_function
= Qnil
;
2408 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings
,
2409 "Non-nil means `load' should force-load all dynamic doc strings.\n\
2410 This is useful when the file being loaded is a temporary copy.");
2411 load_force_doc_strings
= 0;
2413 load_descriptor_list
= Qnil
;
2414 staticpro (&load_descriptor_list
);
2416 Qcurrent_load_list
= intern ("current-load-list");
2417 staticpro (&Qcurrent_load_list
);
2419 Qstandard_input
= intern ("standard-input");
2420 staticpro (&Qstandard_input
);
2422 Qread_char
= intern ("read-char");
2423 staticpro (&Qread_char
);
2425 Qget_file_char
= intern ("get-file-char");
2426 staticpro (&Qget_file_char
);
2428 Qbackquote
= intern ("`");
2429 staticpro (&Qbackquote
);
2430 Qcomma
= intern (",");
2431 staticpro (&Qcomma
);
2432 Qcomma_at
= intern (",@");
2433 staticpro (&Qcomma_at
);
2434 Qcomma_dot
= intern (",.");
2435 staticpro (&Qcomma_dot
);
2437 Qascii_character
= intern ("ascii-character");
2438 staticpro (&Qascii_character
);
2440 Qfunction
= intern ("function");
2441 staticpro (&Qfunction
);
2443 Qload
= intern ("load");
2446 Qload_file_name
= intern ("load-file-name");
2447 staticpro (&Qload_file_name
);