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>
47 #ifdef LISP_FLOAT_TYPE
57 #endif /* LISP_FLOAT_TYPE */
65 Lisp_Object Qread_char
, Qget_file_char
, Qstandard_input
, Qcurrent_load_list
;
66 Lisp_Object Qvariable_documentation
, Vvalues
, Vstandard_input
, Vafter_load_alist
;
67 Lisp_Object Qascii_character
, Qload
, Qload_file_name
;
68 Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
70 extern Lisp_Object Qevent_symbol_element_mask
;
72 /* non-zero if inside `load' */
75 /* Directory in which the sources were found. */
76 Lisp_Object Vsource_directory
;
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 signaling 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 buffer
, printflag
;
810 int count
= specpdl_ptr
- specpdl
;
811 Lisp_Object tem
, buf
;
814 buf
= Fcurrent_buffer ();
816 buf
= Fget_buffer (buffer
);
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.")
871 (start
, end
, printflag
)
872 Lisp_Object start
, end
, 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 start and checks its type. */
891 Fnarrow_to_region (make_number (BEGV
), end
);
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 size_in_chars
= ((XFASTINT (length
) + BITS_PER_CHAR
)
1210 tmp
= read1 (readcharfun
, pch
, first_in_list
);
1211 if (size_in_chars
!= XSTRING (tmp
)->size
)
1212 Fsignal (Qinvalid_read_syntax
,
1213 Fcons (make_string ("#&", 2), Qnil
));
1215 val
= Fmake_bool_vector (length
, Qnil
);
1216 bcopy (XSTRING (tmp
)->data
, XBOOL_VECTOR (val
)->data
,
1220 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#&", 2), Qnil
));
1224 /* Accept compiled functions at read-time so that we don't have to
1225 build them using function calls. */
1227 tmp
= read_vector (readcharfun
);
1228 return Fmake_byte_code (XVECTOR (tmp
)->size
,
1229 XVECTOR (tmp
)->contents
);
1231 #ifdef USE_TEXT_PROPERTIES
1235 struct gcpro gcpro1
;
1238 /* Read the string itself. */
1239 tmp
= read1 (readcharfun
, &ch
, 0);
1240 if (ch
!= 0 || !STRINGP (tmp
))
1241 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1243 /* Read the intervals and their properties. */
1246 Lisp_Object beg
, end
, plist
;
1248 beg
= read1 (readcharfun
, &ch
, 0);
1252 end
= read1 (readcharfun
, &ch
, 0);
1254 plist
= read1 (readcharfun
, &ch
, 0);
1256 Fsignal (Qinvalid_read_syntax
,
1257 Fcons (build_string ("invalid string property list"),
1259 Fset_text_properties (beg
, end
, plist
, tmp
);
1265 /* #@NUMBER is used to skip NUMBER following characters.
1266 That's used in .elc files to skip over doc strings
1267 and function definitions. */
1272 /* Read a decimal integer. */
1273 while ((c
= READCHAR
) >= 0
1274 && c
>= '0' && c
<= '9')
1282 #ifndef DOS_NT /* I don't know if filepos works right on MSDOS and Windoze. */
1283 if (load_force_doc_strings
&& EQ (readcharfun
, Qget_file_char
))
1285 /* If we are supposed to force doc strings into core right now,
1286 record the last string that we skipped,
1287 and record where in the file it comes from. */
1288 if (saved_doc_string_size
== 0)
1290 saved_doc_string_size
= nskip
+ 100;
1291 saved_doc_string
= (char *) xmalloc (saved_doc_string_size
);
1293 if (nskip
> saved_doc_string_size
)
1295 saved_doc_string_size
= nskip
+ 100;
1296 saved_doc_string
= (char *) xrealloc (saved_doc_string
,
1297 saved_doc_string_size
);
1300 saved_doc_string_position
= ftell (instream
);
1302 /* Copy that many characters into saved_doc_string. */
1303 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1304 saved_doc_string
[i
] = c
= READCHAR
;
1306 saved_doc_string_length
= i
;
1309 #endif /* not DOS_NT */
1311 /* Skip that many characters. */
1312 for (i
= 0; i
< nskip
&& c
>= 0; i
++)
1318 return Vload_file_name
;
1320 return Fcons (Qfunction
, Fcons (read0 (readcharfun
), Qnil
));
1324 Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("#", 1), Qnil
));
1327 while ((c
= READCHAR
) >= 0 && c
!= '\n');
1332 return Fcons (Qquote
, Fcons (read0 (readcharfun
), Qnil
));
1342 new_backquote_flag
= 1;
1343 value
= read0 (readcharfun
);
1344 new_backquote_flag
= 0;
1346 return Fcons (Qbackquote
, Fcons (value
, Qnil
));
1350 if (new_backquote_flag
)
1352 Lisp_Object comma_type
= Qnil
;
1357 comma_type
= Qcomma_at
;
1359 comma_type
= Qcomma_dot
;
1362 if (ch
>= 0) UNREAD (ch
);
1363 comma_type
= Qcomma
;
1366 new_backquote_flag
= 0;
1367 value
= read0 (readcharfun
);
1368 new_backquote_flag
= 1;
1369 return Fcons (comma_type
, Fcons (value
, Qnil
));
1376 register Lisp_Object val
;
1379 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1382 XSETINT (val
, read_escape (readcharfun
));
1391 register char *p
= read_buffer
;
1392 register char *end
= read_buffer
+ read_buffer_size
;
1396 while ((c
= READCHAR
) >= 0
1401 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1402 p
+= new - read_buffer
;
1403 read_buffer
+= new - read_buffer
;
1404 end
= read_buffer
+ read_buffer_size
;
1407 c
= read_escape (readcharfun
);
1408 /* c is -1 if \ newline has just been seen */
1411 if (p
== read_buffer
)
1416 /* Allow `\C- ' and `\C-?'. */
1417 if (c
== (CHAR_CTL
| ' '))
1419 else if (c
== (CHAR_CTL
| '?'))
1423 /* Move the meta bit to the right place for a string. */
1424 c
= (c
& ~CHAR_META
) | 0x80;
1426 error ("Invalid modifier in string");
1430 if (c
< 0) return Fsignal (Qend_of_file
, Qnil
);
1432 /* If purifying, and string starts with \ newline,
1433 return zero instead. This is for doc strings
1434 that we are really going to find in etc/DOC.nn.nn */
1435 if (!NILP (Vpurify_flag
) && NILP (Vdoc_file_name
) && cancel
)
1436 return make_number (0);
1439 return make_pure_string (read_buffer
, p
- read_buffer
);
1441 return make_string (read_buffer
, p
- read_buffer
);
1446 #ifdef LISP_FLOAT_TYPE
1447 /* If a period is followed by a number, then we should read it
1448 as a floating point number. Otherwise, it denotes a dotted
1450 int next_char
= READCHAR
;
1453 if (! (next_char
>= '0' && next_char
<= '9'))
1460 /* Otherwise, we fall through! Note that the atom-reading loop
1461 below will now loop at least once, assuring that we will not
1462 try to UNREAD two characters in a row. */
1466 if (c
<= 040) goto retry
;
1468 register char *p
= read_buffer
;
1472 register char *end
= read_buffer
+ read_buffer_size
;
1475 !(c
== '\"' || c
== '\'' || c
== ';' || c
== '?'
1476 || c
== '(' || c
== ')'
1477 #ifndef LISP_FLOAT_TYPE
1478 /* If we have floating-point support, then we need
1479 to allow <digits><dot><digits>. */
1481 #endif /* not LISP_FLOAT_TYPE */
1482 || c
== '[' || c
== ']' || c
== '#'
1487 register char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1488 p
+= new - read_buffer
;
1489 read_buffer
+= new - read_buffer
;
1490 end
= read_buffer
+ read_buffer_size
;
1503 char *new = (char *) xrealloc (read_buffer
, read_buffer_size
*= 2);
1504 p
+= new - read_buffer
;
1505 read_buffer
+= new - read_buffer
;
1506 /* end = read_buffer + read_buffer_size; */
1516 register Lisp_Object val
;
1518 if (*p1
== '+' || *p1
== '-') p1
++;
1519 /* Is it an integer? */
1522 while (p1
!= p
&& (c
= *p1
) >= '0' && c
<= '9') p1
++;
1523 #ifdef LISP_FLOAT_TYPE
1524 /* Integers can have trailing decimal points. */
1525 if (p1
> read_buffer
&& p1
< p
&& *p1
== '.') p1
++;
1528 /* It is an integer. */
1530 #ifdef LISP_FLOAT_TYPE
1534 if (sizeof (int) == sizeof (EMACS_INT
))
1535 XSETINT (val
, atoi (read_buffer
));
1536 else if (sizeof (long) == sizeof (EMACS_INT
))
1537 XSETINT (val
, atol (read_buffer
));
1543 #ifdef LISP_FLOAT_TYPE
1544 if (isfloat_string (read_buffer
))
1545 return make_float (atof (read_buffer
));
1549 return intern (read_buffer
);
1554 #ifdef LISP_FLOAT_TYPE
1569 if (*cp
== '+' || *cp
== '-')
1572 if (*cp
>= '0' && *cp
<= '9')
1575 while (*cp
>= '0' && *cp
<= '9')
1583 if (*cp
>= '0' && *cp
<= '9')
1586 while (*cp
>= '0' && *cp
<= '9')
1593 if (*cp
== '+' || *cp
== '-')
1597 if (*cp
>= '0' && *cp
<= '9')
1600 while (*cp
>= '0' && *cp
<= '9')
1603 return (((*cp
== 0) || (*cp
== ' ') || (*cp
== '\t') || (*cp
== '\n') || (*cp
== '\r') || (*cp
== '\f'))
1604 && (state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
)
1605 || state
== (DOT_CHAR
|TRAIL_INT
)
1606 || state
== (LEAD_INT
|E_CHAR
|EXP_INT
)
1607 || state
== (LEAD_INT
|DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)
1608 || state
== (DOT_CHAR
|TRAIL_INT
|E_CHAR
|EXP_INT
)));
1610 #endif /* LISP_FLOAT_TYPE */
1613 read_vector (readcharfun
)
1614 Lisp_Object readcharfun
;
1618 register Lisp_Object
*ptr
;
1619 register Lisp_Object tem
, vector
;
1620 register struct Lisp_Cons
*otem
;
1623 tem
= read_list (1, readcharfun
);
1624 len
= Flength (tem
);
1625 vector
= (read_pure
? make_pure_vector (XINT (len
)) : Fmake_vector (len
, Qnil
));
1628 size
= XVECTOR (vector
)->size
;
1629 ptr
= XVECTOR (vector
)->contents
;
1630 for (i
= 0; i
< size
; i
++)
1632 ptr
[i
] = read_pure
? Fpurecopy (Fcar (tem
)) : Fcar (tem
);
1640 /* flag = 1 means check for ] to terminate rather than ) and .
1641 flag = -1 means check for starting with defun
1642 and make structure pure. */
1645 read_list (flag
, readcharfun
)
1647 register Lisp_Object readcharfun
;
1649 /* -1 means check next element for defun,
1650 0 means don't check,
1651 1 means already checked and found defun. */
1652 int defunflag
= flag
< 0 ? -1 : 0;
1653 Lisp_Object val
, tail
;
1654 register Lisp_Object elt
, tem
;
1655 struct gcpro gcpro1
, gcpro2
;
1656 /* 0 is the normal case.
1657 1 means this list is a doc reference; replace it with the number 0.
1658 2 means this list is a doc reference; replace it with the doc string. */
1659 int doc_reference
= 0;
1661 /* Initialize this to 1 if we are reading a list. */
1662 int first_in_list
= flag
<= 0;
1671 elt
= read1 (readcharfun
, &ch
, first_in_list
);
1676 /* While building, if the list starts with #$, treat it specially. */
1677 if (EQ (elt
, Vload_file_name
)
1678 && !NILP (Vpurify_flag
))
1680 if (NILP (Vdoc_file_name
))
1681 /* We have not yet called Snarf-documentation, so assume
1682 this file is described in the DOC-MM.NN file
1683 and Snarf-documentation will fill in the right value later.
1684 For now, replace the whole list with 0. */
1687 /* We have already called Snarf-documentation, so make a relative
1688 file name for this file, so it can be found properly
1689 in the installed Lisp directory.
1690 We don't use Fexpand_file_name because that would make
1691 the directory absolute now. */
1692 elt
= concat2 (build_string ("../lisp/"),
1693 Ffile_name_nondirectory (elt
));
1695 else if (EQ (elt
, Vload_file_name
)
1696 && load_force_doc_strings
)
1705 Fsignal (Qinvalid_read_syntax
,
1706 Fcons (make_string (") or . in a vector", 18), Qnil
));
1714 XCONS (tail
)->cdr
= read0 (readcharfun
);
1716 val
= read0 (readcharfun
);
1717 read1 (readcharfun
, &ch
, 0);
1721 if (doc_reference
== 1)
1722 return make_number (0);
1723 if (doc_reference
== 2)
1725 /* Get a doc string from the file we are loading.
1726 If it's in saved_doc_string, get it from there. */
1727 int pos
= XINT (XCONS (val
)->cdr
);
1728 if (pos
>= saved_doc_string_position
1729 && pos
< (saved_doc_string_position
1730 + saved_doc_string_length
))
1732 int start
= pos
- saved_doc_string_position
;
1735 /* Process quoting with ^A,
1736 and find the end of the string,
1737 which is marked with ^_ (037). */
1738 for (from
= start
, to
= start
;
1739 saved_doc_string
[from
] != 037;)
1741 int c
= saved_doc_string
[from
++];
1744 c
= saved_doc_string
[from
++];
1746 saved_doc_string
[to
++] = c
;
1748 saved_doc_string
[to
++] = 0;
1750 saved_doc_string
[to
++] = 037;
1753 saved_doc_string
[to
++] = c
;
1756 return make_string (saved_doc_string
+ start
,
1760 return read_doc_string (val
);
1765 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string (". in wrong context", 18), Qnil
));
1767 return Fsignal (Qinvalid_read_syntax
, Fcons (make_string ("] in a list", 11), Qnil
));
1769 tem
= (read_pure
&& flag
<= 0
1770 ? pure_cons (elt
, Qnil
)
1771 : Fcons (elt
, Qnil
));
1773 XCONS (tail
)->cdr
= tem
;
1778 defunflag
= EQ (elt
, Qdefun
);
1779 else if (defunflag
> 0)
1784 Lisp_Object Vobarray
;
1785 Lisp_Object initial_obarray
;
1787 /* oblookup stores the bucket number here, for the sake of Funintern. */
1789 int oblookup_last_bucket_number
;
1791 static int hash_string ();
1792 Lisp_Object
oblookup ();
1794 /* Get an error if OBARRAY is not an obarray.
1795 If it is one, return it. */
1798 check_obarray (obarray
)
1799 Lisp_Object obarray
;
1801 while (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1803 /* If Vobarray is now invalid, force it to be valid. */
1804 if (EQ (Vobarray
, obarray
)) Vobarray
= initial_obarray
;
1806 obarray
= wrong_type_argument (Qvectorp
, obarray
);
1811 /* Intern the C string STR: return a symbol with that name,
1812 interned in the current obarray. */
1819 int len
= strlen (str
);
1820 Lisp_Object obarray
;
1823 if (!VECTORP (obarray
) || XVECTOR (obarray
)->size
== 0)
1824 obarray
= check_obarray (obarray
);
1825 tem
= oblookup (obarray
, str
, len
);
1828 return Fintern ((!NILP (Vpurify_flag
)
1829 ? make_pure_string (str
, len
)
1830 : make_string (str
, len
)),
1834 DEFUN ("intern", Fintern
, Sintern
, 1, 2, 0,
1835 "Return the canonical symbol whose name is STRING.\n\
1836 If there is none, one is created by this function and returned.\n\
1837 A second optional argument specifies the obarray to use;\n\
1838 it defaults to the value of `obarray'.")
1840 Lisp_Object string
, obarray
;
1842 register Lisp_Object tem
, sym
, *ptr
;
1844 if (NILP (obarray
)) obarray
= Vobarray
;
1845 obarray
= check_obarray (obarray
);
1847 CHECK_STRING (string
, 0);
1849 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1850 if (!INTEGERP (tem
))
1853 if (!NILP (Vpurify_flag
))
1854 string
= Fpurecopy (string
);
1855 sym
= Fmake_symbol (string
);
1857 ptr
= &XVECTOR (obarray
)->contents
[XINT (tem
)];
1859 XSYMBOL (sym
)->next
= XSYMBOL (*ptr
);
1861 XSYMBOL (sym
)->next
= 0;
1866 DEFUN ("intern-soft", Fintern_soft
, Sintern_soft
, 1, 2, 0,
1867 "Return the canonical symbol whose name is STRING, or nil if none exists.\n\
1868 A second optional argument specifies the obarray to use;\n\
1869 it defaults to the value of `obarray'.")
1871 Lisp_Object string
, obarray
;
1873 register Lisp_Object tem
;
1875 if (NILP (obarray
)) obarray
= Vobarray
;
1876 obarray
= check_obarray (obarray
);
1878 CHECK_STRING (string
, 0);
1880 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1881 if (!INTEGERP (tem
))
1886 DEFUN ("unintern", Funintern
, Sunintern
, 1, 2, 0,
1887 "Delete the symbol named NAME, if any, from OBARRAY.\n\
1888 The value is t if a symbol was found and deleted, nil otherwise.\n\
1889 NAME may be a string or a symbol. If it is a symbol, that symbol\n\
1890 is deleted, if it belongs to OBARRAY--no other symbol is deleted.\n\
1891 OBARRAY defaults to the value of the variable `obarray'.")
1893 Lisp_Object name
, obarray
;
1895 register Lisp_Object string
, tem
;
1898 if (NILP (obarray
)) obarray
= Vobarray
;
1899 obarray
= check_obarray (obarray
);
1902 XSETSTRING (string
, XSYMBOL (name
)->name
);
1905 CHECK_STRING (name
, 0);
1909 tem
= oblookup (obarray
, XSTRING (string
)->data
, XSTRING (string
)->size
);
1912 /* If arg was a symbol, don't delete anything but that symbol itself. */
1913 if (SYMBOLP (name
) && !EQ (name
, tem
))
1916 hash
= oblookup_last_bucket_number
;
1918 if (EQ (XVECTOR (obarray
)->contents
[hash
], tem
))
1920 if (XSYMBOL (tem
)->next
)
1921 XSETSYMBOL (XVECTOR (obarray
)->contents
[hash
], XSYMBOL (tem
)->next
);
1923 XSETINT (XVECTOR (obarray
)->contents
[hash
], 0);
1927 Lisp_Object tail
, following
;
1929 for (tail
= XVECTOR (obarray
)->contents
[hash
];
1930 XSYMBOL (tail
)->next
;
1933 XSETSYMBOL (following
, XSYMBOL (tail
)->next
);
1934 if (EQ (following
, tem
))
1936 XSYMBOL (tail
)->next
= XSYMBOL (following
)->next
;
1945 /* Return the symbol in OBARRAY whose names matches the string
1946 of SIZE characters at PTR. If there is no such symbol in OBARRAY,
1949 Also store the bucket number in oblookup_last_bucket_number. */
1952 oblookup (obarray
, ptr
, size
)
1953 Lisp_Object obarray
;
1959 register Lisp_Object tail
;
1960 Lisp_Object bucket
, tem
;
1962 if (!VECTORP (obarray
)
1963 || (obsize
= XVECTOR (obarray
)->size
) == 0)
1965 obarray
= check_obarray (obarray
);
1966 obsize
= XVECTOR (obarray
)->size
;
1968 /* This is sometimes needed in the middle of GC. */
1969 obsize
&= ~ARRAY_MARK_FLAG
;
1970 /* Combining next two lines breaks VMS C 2.3. */
1971 hash
= hash_string (ptr
, size
);
1973 bucket
= XVECTOR (obarray
)->contents
[hash
];
1974 oblookup_last_bucket_number
= hash
;
1975 if (XFASTINT (bucket
) == 0)
1977 else if (!SYMBOLP (bucket
))
1978 error ("Bad data in guts of obarray"); /* Like CADR error message */
1980 for (tail
= bucket
; ; XSETSYMBOL (tail
, XSYMBOL (tail
)->next
))
1982 if (XSYMBOL (tail
)->name
->size
== size
1983 && !bcmp (XSYMBOL (tail
)->name
->data
, ptr
, size
))
1985 else if (XSYMBOL (tail
)->next
== 0)
1988 XSETINT (tem
, hash
);
1993 hash_string (ptr
, len
)
1997 register unsigned char *p
= ptr
;
1998 register unsigned char *end
= p
+ len
;
1999 register unsigned char c
;
2000 register int hash
= 0;
2005 if (c
>= 0140) c
-= 40;
2006 hash
= ((hash
<<3) + (hash
>>28) + c
);
2008 return hash
& 07777777777;
2012 map_obarray (obarray
, fn
, arg
)
2013 Lisp_Object obarray
;
2018 register Lisp_Object tail
;
2019 CHECK_VECTOR (obarray
, 1);
2020 for (i
= XVECTOR (obarray
)->size
- 1; i
>= 0; i
--)
2022 tail
= XVECTOR (obarray
)->contents
[i
];
2023 if (XFASTINT (tail
) != 0)
2027 if (XSYMBOL (tail
)->next
== 0)
2029 XSETSYMBOL (tail
, XSYMBOL (tail
)->next
);
2034 mapatoms_1 (sym
, function
)
2035 Lisp_Object sym
, function
;
2037 call1 (function
, sym
);
2040 DEFUN ("mapatoms", Fmapatoms
, Smapatoms
, 1, 2, 0,
2041 "Call FUNCTION on every symbol in OBARRAY.\n\
2042 OBARRAY defaults to the value of `obarray'.")
2044 Lisp_Object function
, obarray
;
2048 if (NILP (obarray
)) obarray
= Vobarray
;
2049 obarray
= check_obarray (obarray
);
2051 map_obarray (obarray
, mapatoms_1
, function
);
2055 #define OBARRAY_SIZE 1511
2060 Lisp_Object oblength
;
2064 XSETFASTINT (oblength
, OBARRAY_SIZE
);
2066 Qnil
= Fmake_symbol (make_pure_string ("nil", 3));
2067 Vobarray
= Fmake_vector (oblength
, make_number (0));
2068 initial_obarray
= Vobarray
;
2069 staticpro (&initial_obarray
);
2070 /* Intern nil in the obarray */
2071 /* These locals are to kludge around a pyramid compiler bug. */
2072 hash
= hash_string ("nil", 3);
2073 /* Separate statement here to avoid VAXC bug. */
2074 hash
%= OBARRAY_SIZE
;
2075 tem
= &XVECTOR (Vobarray
)->contents
[hash
];
2078 Qunbound
= Fmake_symbol (make_pure_string ("unbound", 7));
2079 XSYMBOL (Qnil
)->function
= Qunbound
;
2080 XSYMBOL (Qunbound
)->value
= Qunbound
;
2081 XSYMBOL (Qunbound
)->function
= Qunbound
;
2084 XSYMBOL (Qnil
)->value
= Qnil
;
2085 XSYMBOL (Qnil
)->plist
= Qnil
;
2086 XSYMBOL (Qt
)->value
= Qt
;
2088 /* Qt is correct even if CANNOT_DUMP. loadup.el will set to nil at end. */
2091 Qvariable_documentation
= intern ("variable-documentation");
2093 read_buffer_size
= 100;
2094 read_buffer
= (char *) malloc (read_buffer_size
);
2099 struct Lisp_Subr
*sname
;
2102 sym
= intern (sname
->symbol_name
);
2103 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2106 #ifdef NOTDEF /* use fset in subr.el now */
2108 defalias (sname
, string
)
2109 struct Lisp_Subr
*sname
;
2113 sym
= intern (string
);
2114 XSETSUBR (XSYMBOL (sym
)->function
, sname
);
2118 /* Define an "integer variable"; a symbol whose value is forwarded
2119 to a C variable of type int. Sample call: */
2120 /* DEFVAR_INT ("indent-tabs-mode", &indent_tabs_mode, "Documentation"); */
2122 defvar_int (namestring
, address
)
2126 Lisp_Object sym
, val
;
2127 sym
= intern (namestring
);
2128 val
= allocate_misc ();
2129 XMISCTYPE (val
) = Lisp_Misc_Intfwd
;
2130 XINTFWD (val
)->intvar
= address
;
2131 XSYMBOL (sym
)->value
= val
;
2134 /* Similar but define a variable whose value is T if address contains 1,
2135 NIL if address contains 0 */
2137 defvar_bool (namestring
, address
)
2141 Lisp_Object sym
, val
;
2142 sym
= intern (namestring
);
2143 val
= allocate_misc ();
2144 XMISCTYPE (val
) = Lisp_Misc_Boolfwd
;
2145 XBOOLFWD (val
)->boolvar
= address
;
2146 XSYMBOL (sym
)->value
= val
;
2149 /* Similar but define a variable whose value is the Lisp Object stored
2150 at address. Two versions: with and without gc-marking of the C
2151 variable. The nopro version is used when that variable will be
2152 gc-marked for some other reason, since marking the same slot twice
2153 can cause trouble with strings. */
2155 defvar_lisp_nopro (namestring
, address
)
2157 Lisp_Object
*address
;
2159 Lisp_Object sym
, val
;
2160 sym
= intern (namestring
);
2161 val
= allocate_misc ();
2162 XMISCTYPE (val
) = Lisp_Misc_Objfwd
;
2163 XOBJFWD (val
)->objvar
= address
;
2164 XSYMBOL (sym
)->value
= val
;
2168 defvar_lisp (namestring
, address
)
2170 Lisp_Object
*address
;
2172 defvar_lisp_nopro (namestring
, address
);
2173 staticpro (address
);
2178 /* Similar but define a variable whose value is the Lisp Object stored in
2179 the current buffer. address is the address of the slot in the buffer
2180 that is current now. */
2183 defvar_per_buffer (namestring
, address
, type
, doc
)
2185 Lisp_Object
*address
;
2189 Lisp_Object sym
, val
;
2191 extern struct buffer buffer_local_symbols
;
2193 sym
= intern (namestring
);
2194 val
= allocate_misc ();
2195 offset
= (char *)address
- (char *)current_buffer
;
2197 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
2198 XBUFFER_OBJFWD (val
)->offset
= offset
;
2199 XSYMBOL (sym
)->value
= val
;
2200 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
) = sym
;
2201 *(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
) = type
;
2202 if (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
)) == 0)
2203 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
2204 slot of buffer_local_flags */
2208 #endif /* standalone */
2210 /* Similar but define a variable whose value is the Lisp Object stored
2211 at a particular offset in the current kboard object. */
2214 defvar_kboard (namestring
, offset
)
2218 Lisp_Object sym
, val
;
2219 sym
= intern (namestring
);
2220 val
= allocate_misc ();
2221 XMISCTYPE (val
) = Lisp_Misc_Kboard_Objfwd
;
2222 XKBOARD_OBJFWD (val
)->offset
= offset
;
2223 XSYMBOL (sym
)->value
= val
;
2226 /* Record the value of load-path used at the start of dumping
2227 so we can see if the site changed it later during dumping. */
2228 static Lisp_Object dump_path
;
2233 int turn_off_warning
= 0;
2235 /* Compute the default load-path. */
2237 normal
= PATH_LOADSEARCH
;
2238 Vload_path
= decode_env_path (0, normal
);
2240 if (NILP (Vpurify_flag
))
2241 normal
= PATH_LOADSEARCH
;
2243 normal
= PATH_DUMPLOADSEARCH
;
2245 /* In a dumped Emacs, we normally have to reset the value of
2246 Vload_path from PATH_LOADSEARCH, since the value that was dumped
2247 uses ../lisp, instead of the path of the installed elisp
2248 libraries. However, if it appears that Vload_path was changed
2249 from the default before dumping, don't override that value. */
2252 if (! NILP (Fequal (dump_path
, Vload_path
)))
2254 Vload_path
= decode_env_path (0, normal
);
2255 if (!NILP (Vinstallation_directory
))
2257 /* Add to the path the lisp subdir of the
2258 installation dir, if it exists. */
2259 Lisp_Object tem
, tem1
;
2260 tem
= Fexpand_file_name (build_string ("lisp"),
2261 Vinstallation_directory
);
2262 tem1
= Ffile_exists_p (tem
);
2265 if (NILP (Fmember (tem
, Vload_path
)))
2267 turn_off_warning
= 1;
2268 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2272 /* That dir doesn't exist, so add the build-time
2273 Lisp dirs instead. */
2274 Vload_path
= nconc2 (Vload_path
, dump_path
);
2276 /* Add site-list under the installation dir, if it exists. */
2277 tem
= Fexpand_file_name (build_string ("site-lisp"),
2278 Vinstallation_directory
);
2279 tem1
= Ffile_exists_p (tem
);
2282 if (NILP (Fmember (tem
, Vload_path
)))
2283 Vload_path
= nconc2 (Vload_path
, Fcons (tem
, Qnil
));
2290 /* ../lisp refers to the build directory.
2291 NORMAL refers to the lisp dir in the source directory. */
2292 Vload_path
= Fcons (build_string ("../lisp"),
2293 decode_env_path (0, normal
));
2294 dump_path
= Vload_path
;
2299 /* When Emacs is invoked over network shares on NT, PATH_LOADSEARCH is
2300 almost never correct, thereby causing a warning to be printed out that
2301 confuses users. Since PATH_LOADSEARCH is always overridden by the
2302 EMACSLOADPATH environment variable below, disable the warning on NT. */
2304 /* Warn if dirs in the *standard* path don't exist. */
2305 if (!turn_off_warning
)
2307 Lisp_Object path_tail
;
2309 for (path_tail
= Vload_path
;
2311 path_tail
= XCONS (path_tail
)->cdr
)
2313 Lisp_Object dirfile
;
2314 dirfile
= Fcar (path_tail
);
2315 if (STRINGP (dirfile
))
2317 dirfile
= Fdirectory_file_name (dirfile
);
2318 if (access (XSTRING (dirfile
)->data
, 0) < 0)
2320 "Warning: Lisp directory `%s' does not exist.\n",
2321 XSTRING (Fcar (path_tail
))->data
);
2325 #endif /* WINDOWSNT */
2327 /* If the EMACSLOADPATH environment variable is set, use its value.
2328 This doesn't apply if we're dumping. */
2330 if (NILP (Vpurify_flag
)
2331 && egetenv ("EMACSLOADPATH"))
2333 Vload_path
= decode_env_path ("EMACSLOADPATH", normal
);
2337 load_in_progress
= 0;
2339 load_descriptor_list
= Qnil
;
2346 defsubr (&Sread_from_string
);
2348 defsubr (&Sintern_soft
);
2349 defsubr (&Sunintern
);
2351 defsubr (&Seval_buffer
);
2352 defsubr (&Seval_region
);
2353 defsubr (&Sread_char
);
2354 defsubr (&Sread_char_exclusive
);
2355 defsubr (&Sread_event
);
2356 defsubr (&Sget_file_char
);
2357 defsubr (&Smapatoms
);
2359 DEFVAR_LISP ("obarray", &Vobarray
,
2360 "Symbol table for use by `intern' and `read'.\n\
2361 It is a vector whose length ought to be prime for best results.\n\
2362 The vector's contents don't make sense if examined from Lisp programs;\n\
2363 to find all the symbols in an obarray, use `mapatoms'.");
2365 DEFVAR_LISP ("values", &Vvalues
,
2366 "List of values of all expressions which were read, evaluated and printed.\n\
2367 Order is reverse chronological.");
2369 DEFVAR_LISP ("standard-input", &Vstandard_input
,
2370 "Stream for read to get input from.\n\
2371 See documentation of `read' for possible values.");
2372 Vstandard_input
= Qt
;
2374 DEFVAR_LISP ("load-path", &Vload_path
,
2375 "*List of directories to search for files to load.\n\
2376 Each element is a string (directory name) or nil (try default directory).\n\
2377 Initialized based on EMACSLOADPATH environment variable, if any,\n\
2378 otherwise to default specified by file `paths.h' when Emacs was built.");
2380 DEFVAR_BOOL ("load-in-progress", &load_in_progress
,
2381 "Non-nil iff inside of `load'.");
2383 DEFVAR_LISP ("after-load-alist", &Vafter_load_alist
,
2384 "An alist of expressions to be evalled when particular files are loaded.\n\
2385 Each element looks like (FILENAME FORMS...).\n\
2386 When `load' is run and the file-name argument is FILENAME,\n\
2387 the FORMS in the corresponding element are executed at the end of loading.\n\n\
2388 FILENAME must match exactly! Normally FILENAME is the name of a library,\n\
2389 with no directory specified, since that is how `load' is normally called.\n\
2390 An error in FORMS does not undo the load,\n\
2391 but does prevent execution of the rest of the FORMS.");
2392 Vafter_load_alist
= Qnil
;
2394 DEFVAR_LISP ("load-history", &Vload_history
,
2395 "Alist mapping source file names to symbols and features.\n\
2396 Each alist element is a list that starts with a file name,\n\
2397 except for one element (optional) that starts with nil and describes\n\
2398 definitions evaluated from buffers not visiting files.\n\
2399 The remaining elements of each list are symbols defined as functions\n\
2400 or variables, and cons cells `(provide . FEATURE)' and `(require . FEATURE)'.");
2401 Vload_history
= Qnil
;
2403 DEFVAR_LISP ("load-file-name", &Vload_file_name
,
2404 "Full name of file being loaded by `load'.");
2405 Vload_file_name
= Qnil
;
2407 DEFVAR_LISP ("current-load-list", &Vcurrent_load_list
,
2408 "Used for internal purposes by `load'.");
2409 Vcurrent_load_list
= Qnil
;
2411 DEFVAR_LISP ("load-read-function", &Vload_read_function
,
2412 "Function used by `load' and `eval-region' for reading expressions.\n\
2413 The default is nil, which means use the function `read'.");
2414 Vload_read_function
= Qnil
;
2416 DEFVAR_BOOL ("load-force-doc-strings", &load_force_doc_strings
,
2417 "Non-nil means `load' should force-load all dynamic doc strings.\n\
2418 This is useful when the file being loaded is a temporary copy.");
2419 load_force_doc_strings
= 0;
2421 DEFVAR_LISP ("source-directory", &Vsource_directory
,
2422 "Directory in which Emacs sources were found when Emacs was built.\n\
2423 You cannot count on them to still be there!");
2425 = Fexpand_file_name (build_string ("../"),
2426 Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
)));
2428 /* Vsource_directory was initialized in init_lread. */
2430 load_descriptor_list
= Qnil
;
2431 staticpro (&load_descriptor_list
);
2433 Qcurrent_load_list
= intern ("current-load-list");
2434 staticpro (&Qcurrent_load_list
);
2436 Qstandard_input
= intern ("standard-input");
2437 staticpro (&Qstandard_input
);
2439 Qread_char
= intern ("read-char");
2440 staticpro (&Qread_char
);
2442 Qget_file_char
= intern ("get-file-char");
2443 staticpro (&Qget_file_char
);
2445 Qbackquote
= intern ("`");
2446 staticpro (&Qbackquote
);
2447 Qcomma
= intern (",");
2448 staticpro (&Qcomma
);
2449 Qcomma_at
= intern (",@");
2450 staticpro (&Qcomma_at
);
2451 Qcomma_dot
= intern (",.");
2452 staticpro (&Qcomma_dot
);
2454 Qascii_character
= intern ("ascii-character");
2455 staticpro (&Qascii_character
);
2457 Qfunction
= intern ("function");
2458 staticpro (&Qfunction
);
2460 Qload
= intern ("load");
2463 Qload_file_name
= intern ("load-file-name");
2464 staticpro (&Qload_file_name
);
2466 staticpro (&dump_path
);