1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985,86,87,89,93,94,95 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 #include <sys/types.h>
33 #include "intervals.h"
39 #define min(a, b) ((a) < (b) ? (a) : (b))
40 #define max(a, b) ((a) > (b) ? (a) : (b))
42 extern char **environ
;
43 extern Lisp_Object
make_time ();
44 extern void insert_from_buffer ();
45 static int tm_diff ();
46 static void update_buffer_properties ();
47 void set_time_zone_rule ();
49 Lisp_Object Vbuffer_access_fontify_functions
;
50 Lisp_Object Qbuffer_access_fontify_functions
;
51 Lisp_Object Vbuffer_access_fontified_property
;
53 /* Some static data, and a function to initialize it for each run */
55 Lisp_Object Vsystem_name
;
56 Lisp_Object Vuser_real_login_name
; /* login name of current user ID */
57 Lisp_Object Vuser_full_name
; /* full name of current user */
58 Lisp_Object Vuser_login_name
; /* user name from LOGNAME or USER */
64 register unsigned char *p
, *q
, *r
;
65 struct passwd
*pw
; /* password entry for the current user */
68 /* Set up system_name even when dumping. */
72 /* Don't bother with this on initial start when just dumping out */
75 #endif /* not CANNOT_DUMP */
77 pw
= (struct passwd
*) getpwuid (getuid ());
79 /* We let the real user name default to "root" because that's quite
80 accurate on MSDOG and because it lets Emacs find the init file.
81 (The DVX libraries override the Djgpp libraries here.) */
82 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "root");
84 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "unknown");
87 /* Get the effective user name, by consulting environment variables,
88 or the effective uid if those are unset. */
89 user_name
= (char *) getenv ("LOGNAME");
92 user_name
= (char *) getenv ("USERNAME"); /* it's USERNAME on NT */
94 user_name
= (char *) getenv ("USER");
95 #endif /* WINDOWSNT */
98 pw
= (struct passwd
*) getpwuid (geteuid ());
99 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
101 Vuser_login_name
= build_string (user_name
);
103 /* If the user name claimed in the environment vars differs from
104 the real uid, use the claimed name to find the full name. */
105 tem
= Fstring_equal (Vuser_login_name
, Vuser_real_login_name
);
106 Vuser_full_name
= Fuser_full_name (NILP (tem
)? make_number (geteuid())
109 p
= (unsigned char *) getenv ("NAME");
111 Vuser_full_name
= build_string (p
);
114 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
115 "Convert arg CHARACTER to a one-character string containing that character.")
117 Lisp_Object character
;
120 CHECK_NUMBER (character
, 0);
122 c
= XINT (character
);
123 return make_string (&c
, 1);
126 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
127 "Convert arg STRING to a character, the first character of that string.")
129 register Lisp_Object string
;
131 register Lisp_Object val
;
132 register struct Lisp_String
*p
;
133 CHECK_STRING (string
, 0);
135 p
= XSTRING (string
);
137 XSETFASTINT (val
, ((unsigned char *) p
->data
)[0]);
139 XSETFASTINT (val
, 0);
147 register Lisp_Object mark
;
148 mark
= Fmake_marker ();
149 Fset_marker (mark
, make_number (val
), Qnil
);
153 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
154 "Return value of point, as an integer.\n\
155 Beginning of buffer is position (point-min)")
159 XSETFASTINT (temp
, PT
);
163 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
164 "Return value of point, as a marker object.")
167 return buildmark (PT
);
171 clip_to_bounds (lower
, num
, upper
)
172 int lower
, num
, upper
;
176 else if (num
> upper
)
182 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
183 "Set point to POSITION, a number or marker.\n\
184 Beginning of buffer is position (point-min), end is (point-max).")
186 register Lisp_Object position
;
188 CHECK_NUMBER_COERCE_MARKER (position
, 0);
190 SET_PT (clip_to_bounds (BEGV
, XINT (position
), ZV
));
195 region_limit (beginningp
)
198 extern Lisp_Object Vmark_even_if_inactive
; /* Defined in callint.c. */
199 register Lisp_Object m
;
200 if (!NILP (Vtransient_mark_mode
) && NILP (Vmark_even_if_inactive
)
201 && NILP (current_buffer
->mark_active
))
202 Fsignal (Qmark_inactive
, Qnil
);
203 m
= Fmarker_position (current_buffer
->mark
);
204 if (NILP (m
)) error ("There is no region now");
205 if ((PT
< XFASTINT (m
)) == beginningp
)
206 return (make_number (PT
));
211 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
212 "Return position of beginning of region, as an integer.")
215 return (region_limit (1));
218 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
219 "Return position of end of region, as an integer.")
222 return (region_limit (0));
225 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
226 "Return this buffer's mark, as a marker object.\n\
227 Watch out! Moving this marker changes the mark position.\n\
228 If you set the marker not to point anywhere, the buffer will have no mark.")
231 return current_buffer
->mark
;
234 DEFUN ("line-beginning-position", Fline_beginning_position
, Sline_beginning_position
,
236 "Return the character position of the first character on the current line.\n\
237 With argument N not nil or 1, move forward N - 1 lines first.\n\
238 If scan reaches end of buffer, return that position.\n\
239 This function does not move point.")
243 register int orig
, end
;
251 Fforward_line (make_number (XINT (n
) - 1));
255 return make_number (end
);
258 DEFUN ("line-end-position", Fline_end_position
, Sline_end_position
,
260 "Return the character position of the last character on the current line.\n\
261 With argument N not nil or 1, move forward N - 1 lines first.\n\
262 If scan reaches end of buffer, return that position.\n\
263 This function does not move point.")
272 return make_number (find_before_next_newline
273 (PT
, 0, XINT (n
) - (XINT (n
) <= 0)));
277 save_excursion_save ()
279 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
282 return Fcons (Fpoint_marker (),
283 Fcons (Fcopy_marker (current_buffer
->mark
, Qnil
),
284 Fcons (visible
? Qt
: Qnil
,
285 current_buffer
->mark_active
)));
289 save_excursion_restore (info
)
292 Lisp_Object tem
, tem1
, omark
, nmark
;
293 struct gcpro gcpro1
, gcpro2
, gcpro3
;
295 tem
= Fmarker_buffer (Fcar (info
));
296 /* If buffer being returned to is now deleted, avoid error */
297 /* Otherwise could get error here while unwinding to top level
299 /* In that case, Fmarker_buffer returns nil now. */
303 omark
= nmark
= Qnil
;
304 GCPRO3 (info
, omark
, nmark
);
309 unchain_marker (tem
);
310 tem
= Fcar (Fcdr (info
));
311 omark
= Fmarker_position (current_buffer
->mark
);
312 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
313 nmark
= Fmarker_position (tem
);
314 unchain_marker (tem
);
315 tem
= Fcdr (Fcdr (info
));
316 #if 0 /* We used to make the current buffer visible in the selected window
317 if that was true previously. That avoids some anomalies.
318 But it creates others, and it wasn't documented, and it is simpler
319 and cleaner never to alter the window/buffer connections. */
322 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
323 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
326 tem1
= current_buffer
->mark_active
;
327 current_buffer
->mark_active
= Fcdr (tem
);
328 if (!NILP (Vrun_hooks
))
330 /* If mark is active now, and either was not active
331 or was at a different place, run the activate hook. */
332 if (! NILP (current_buffer
->mark_active
))
334 if (! EQ (omark
, nmark
))
335 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
337 /* If mark has ceased to be active, run deactivate hook. */
338 else if (! NILP (tem1
))
339 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
345 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
346 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
347 Executes BODY just like `progn'.\n\
348 The values of point, mark and the current buffer are restored\n\
349 even in case of abnormal exit (throw or error).\n\
350 The state of activation of the mark is also restored.")
354 register Lisp_Object val
;
355 int count
= specpdl_ptr
- specpdl
;
357 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
360 return unbind_to (count
, val
);
363 DEFUN ("save-current-buffer", Fsave_current_buffer
, Ssave_current_buffer
, 0, UNEVALLED
, 0,
364 "Save the current buffer; execute BODY; restore the current buffer.\n\
365 Executes BODY just like `progn'.")
369 register Lisp_Object val
;
370 int count
= specpdl_ptr
- specpdl
;
372 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
375 return unbind_to (count
, val
);
378 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 0, 0,
379 "Return the number of characters in the current buffer.")
383 XSETFASTINT (temp
, Z
- BEG
);
387 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
388 "Return the minimum permissible value of point in the current buffer.\n\
389 This is 1, unless narrowing (a buffer restriction) is in effect.")
393 XSETFASTINT (temp
, BEGV
);
397 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
398 "Return a marker to the minimum permissible value of point in this buffer.\n\
399 This is the beginning, unless narrowing (a buffer restriction) is in effect.")
402 return buildmark (BEGV
);
405 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
406 "Return the maximum permissible value of point in the current buffer.\n\
407 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
408 is in effect, in which case it is less.")
412 XSETFASTINT (temp
, ZV
);
416 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
417 "Return a marker to the maximum permissible value of point in this buffer.\n\
418 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
419 is in effect, in which case it is less.")
422 return buildmark (ZV
);
425 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
426 "Return the character following point, as a number.\n\
427 At the end of the buffer or accessible region, return 0.")
432 XSETFASTINT (temp
, 0);
434 XSETFASTINT (temp
, FETCH_CHAR (PT
));
438 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
439 "Return the character preceding point, as a number.\n\
440 At the beginning of the buffer or accessible region, return 0.")
445 XSETFASTINT (temp
, 0);
447 XSETFASTINT (temp
, FETCH_CHAR (PT
- 1));
451 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
452 "Return T if point is at the beginning of the buffer.\n\
453 If the buffer is narrowed, this means the beginning of the narrowed part.")
461 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
462 "Return T if point is at the end of the buffer.\n\
463 If the buffer is narrowed, this means the end of the narrowed part.")
471 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
472 "Return T if point is at the beginning of a line.")
475 if (PT
== BEGV
|| FETCH_CHAR (PT
- 1) == '\n')
480 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
481 "Return T if point is at the end of a line.\n\
482 `End of a line' includes point being at the end of the buffer.")
485 if (PT
== ZV
|| FETCH_CHAR (PT
) == '\n')
490 DEFUN ("char-after", Fchar_after
, Schar_after
, 1, 1, 0,
491 "Return character in current buffer at position POS.\n\
492 POS is an integer or a buffer pointer.\n\
493 If POS is out of range, the value is nil.")
497 register Lisp_Object val
;
500 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
503 if (n
< BEGV
|| n
>= ZV
) return Qnil
;
505 XSETFASTINT (val
, FETCH_CHAR (n
));
509 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 1, 0,
510 "Return the name under which the user logged in, as a string.\n\
511 This is based on the effective uid, not the real uid.\n\
512 Also, if the environment variable LOGNAME or USER is set,\n\
513 that determines the value of this function.\n\n\
514 If optional argument UID is an integer, return the login name of the user\n\
515 with that uid, or nil if there is no such user.")
521 /* Set up the user name info if we didn't do it before.
522 (That can happen if Emacs is dumpable
523 but you decide to run `temacs -l loadup' and not dump. */
524 if (INTEGERP (Vuser_login_name
))
528 return Vuser_login_name
;
530 CHECK_NUMBER (uid
, 0);
531 pw
= (struct passwd
*) getpwuid (XINT (uid
));
532 return (pw
? build_string (pw
->pw_name
) : Qnil
);
535 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
537 "Return the name of the user's real uid, as a string.\n\
538 This ignores the environment variables LOGNAME and USER, so it differs from\n\
539 `user-login-name' when running under `su'.")
542 /* Set up the user name info if we didn't do it before.
543 (That can happen if Emacs is dumpable
544 but you decide to run `temacs -l loadup' and not dump. */
545 if (INTEGERP (Vuser_login_name
))
547 return Vuser_real_login_name
;
550 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
551 "Return the effective uid of Emacs, as an integer.")
554 return make_number (geteuid ());
557 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
558 "Return the real uid of Emacs, as an integer.")
561 return make_number (getuid ());
564 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 1, 0,
565 "Return the full name of the user logged in, as a string.\n\
566 If optional argument UID is an integer, return the full name of the user\n\
567 with that uid, or \"unknown\" if there is no such user.
568 If UID is a string, return the full name of the user with that login\n\
569 name, or \"unknown\" if no such user could be found.")
574 register char *p
, *q
;
575 extern char *index ();
579 return Vuser_full_name
;
580 else if (NUMBERP (uid
))
581 pw
= (struct passwd
*) getpwuid (XINT (uid
));
582 else if (STRINGP (uid
))
583 pw
= (struct passwd
*) getpwnam (XSTRING (uid
)->data
);
585 error ("Invalid UID specification");
588 return make_string ("unknown");
590 p
= (unsigned char *) USER_FULL_NAME
;
591 /* Chop off everything after the first comma. */
592 q
= (unsigned char *) index (p
, ',');
593 full
= make_string (p
, q
? q
- p
: strlen (p
));
595 #ifdef AMPERSAND_FULL_NAME
596 p
= XSTRING (full
)->data
;
597 q
= (unsigned char *) index (p
, '&');
598 /* Substitute the login name for the &, upcasing the first character. */
604 login
= Fuser_login_name (make_number (pw
->pw_uid
));
605 r
= (unsigned char *) alloca (strlen (p
) + XSTRING (login
)->size
+ 1);
608 strcat (r
, XSTRING (login
)->data
);
609 r
[q
- p
] = UPCASE (r
[q
- p
]);
611 full
= build_string (r
);
613 #endif /* AMPERSAND_FULL_NAME */
618 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
619 "Return the name of the machine you are running on, as a string.")
625 /* For the benefit of callers who don't want to include lisp.h */
629 return (char *) XSTRING (Vsystem_name
)->data
;
632 DEFUN ("emacs-pid", Femacs_pid
, Semacs_pid
, 0, 0, 0,
633 "Return the process ID of Emacs, as an integer.")
636 return make_number (getpid ());
639 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
640 "Return the current time, as the number of seconds since 1970-01-01 00:00:00.\n\
641 The time is returned as a list of three integers. The first has the\n\
642 most significant 16 bits of the seconds, while the second has the\n\
643 least significant 16 bits. The third integer gives the microsecond\n\
646 The microsecond count is zero on systems that do not provide\n\
647 resolution finer than a second.")
651 Lisp_Object result
[3];
654 XSETINT (result
[0], (EMACS_SECS (t
) >> 16) & 0xffff);
655 XSETINT (result
[1], (EMACS_SECS (t
) >> 0) & 0xffff);
656 XSETINT (result
[2], EMACS_USECS (t
));
658 return Flist (3, result
);
663 lisp_time_argument (specified_time
, result
)
664 Lisp_Object specified_time
;
667 if (NILP (specified_time
))
668 return time (result
) != -1;
671 Lisp_Object high
, low
;
672 high
= Fcar (specified_time
);
673 CHECK_NUMBER (high
, 0);
674 low
= Fcdr (specified_time
);
677 CHECK_NUMBER (low
, 0);
678 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
679 return *result
>> 16 == XINT (high
);
683 DEFUN ("format-time-string", Fformat_time_string
, Sformat_time_string
, 1, 2, 0,
684 "Use FORMAT-STRING to format the time TIME.\n\
685 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as from\n\
686 `current-time' and `file-attributes'.\n\
687 FORMAT-STRING may contain %-sequences to substitute parts of the time.\n\
688 %a is replaced by the abbreviated name of the day of week.\n\
689 %A is replaced by the full name of the day of week.\n\
690 %b is replaced by the abbreviated name of the month.\n\
691 %B is replaced by the full name of the month.\n\
692 %c stands for the preferred date/time format of the C locale.\n\
693 %d is replaced by the day of month, zero-padded.\n\
694 %D is a synonym for \"%m/%d/%y\".\n\
695 %e is replaced by the day of month, blank-padded.\n\
696 %h is a synonym for \"%b\".\n\
697 %H is replaced by the hour (00-23).\n\
698 %I is replaced by the hour (00-12).\n\
699 %j is replaced by the day of the year (001-366).\n\
700 %k is replaced by the hour (0-23), blank padded.\n\
701 %l is replaced by the hour (1-12), blank padded.\n\
702 %m is replaced by the month (01-12).\n\
703 %M is replaced by the minute (00-59).\n\
704 %n is a synonym for \"\\n\".\n\
705 %p is replaced by AM or PM, as appropriate.\n\
706 %r is a synonym for \"%I:%M:%S %p\".\n\
707 %R is a synonym for \"%H:%M\".\n\
708 %S is replaced by the second (00-60).\n\
709 %t is a synonym for \"\\t\".\n\
710 %T is a synonym for \"%H:%M:%S\".\n\
711 %U is replaced by the week of the year (00-53), first day of week is Sunday.\n\
712 %w is replaced by the day of week (0-6), Sunday is day 0.\n\
713 %W is replaced by the week of the year (00-53), first day of week is Monday.\n\
714 %x is a locale-specific synonym, which defaults to \"%D\" in the C locale.\n\
715 %X is a locale-specific synonym, which defaults to \"%T\" in the C locale.\n\
716 %y is replaced by the year without century (00-99).\n\
717 %Y is replaced by the year with century.\n\
718 %Z is replaced by the time zone abbreviation.\n\
720 The number of options reflects the `strftime' function.")
721 (format_string
, time
)
722 Lisp_Object format_string
, time
;
727 CHECK_STRING (format_string
, 1);
729 if (! lisp_time_argument (time
, &value
))
730 error ("Invalid time specification");
732 /* This is probably enough. */
733 size
= XSTRING (format_string
)->size
* 6 + 50;
737 char *buf
= (char *) alloca (size
);
739 if (emacs_strftime (buf
, size
, XSTRING (format_string
)->data
,
742 return build_string (buf
);
743 /* If buffer was too small, make it bigger. */
748 DEFUN ("decode-time", Fdecode_time
, Sdecode_time
, 0, 1, 0,
749 "Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE).\n\
750 The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED)\n\
751 or (HIGH . LOW), as from `current-time' and `file-attributes', or `nil'\n\
752 to use the current time. The list has the following nine members:\n\
753 SEC is an integer between 0 and 60; SEC is 60 for a leap second, which\n\
754 only some operating systems support. MINUTE is an integer between 0 and 59.\n\
755 HOUR is an integer between 0 and 23. DAY is an integer between 1 and 31.\n\
756 MONTH is an integer between 1 and 12. YEAR is an integer indicating the\n\
757 four-digit year. DOW is the day of week, an integer between 0 and 6, where\n\
758 0 is Sunday. DST is t if daylight savings time is effect, otherwise nil.\n\
759 ZONE is an integer indicating the number of seconds east of Greenwich.\n\
760 \(Note that Common Lisp has different meanings for DOW and ZONE.)")
762 Lisp_Object specified_time
;
766 struct tm
*decoded_time
;
767 Lisp_Object list_args
[9];
769 if (! lisp_time_argument (specified_time
, &time_spec
))
770 error ("Invalid time specification");
772 decoded_time
= localtime (&time_spec
);
773 XSETFASTINT (list_args
[0], decoded_time
->tm_sec
);
774 XSETFASTINT (list_args
[1], decoded_time
->tm_min
);
775 XSETFASTINT (list_args
[2], decoded_time
->tm_hour
);
776 XSETFASTINT (list_args
[3], decoded_time
->tm_mday
);
777 XSETFASTINT (list_args
[4], decoded_time
->tm_mon
+ 1);
778 XSETINT (list_args
[5], decoded_time
->tm_year
+ 1900);
779 XSETFASTINT (list_args
[6], decoded_time
->tm_wday
);
780 list_args
[7] = (decoded_time
->tm_isdst
)? Qt
: Qnil
;
782 /* Make a copy, in case gmtime modifies the struct. */
783 save_tm
= *decoded_time
;
784 decoded_time
= gmtime (&time_spec
);
785 if (decoded_time
== 0)
788 XSETINT (list_args
[8], tm_diff (&save_tm
, decoded_time
));
789 return Flist (9, list_args
);
792 DEFUN ("encode-time", Fencode_time
, Sencode_time
, 6, MANY
, 0,
793 "Convert SECOND, MINUTE, HOUR, DAY, MONTH, YEAR and ZONE to internal time.\n\
794 This is the reverse operation of `decode-time', which see.\n\
795 ZONE defaults to the current time zone rule. This can\n\
796 be a string or t (as from `set-time-zone-rule'), or it can be a list\n\
797 \(as from `current-time-zone') or an integer (as from `decode-time')\n\
798 applied without consideration for daylight savings time.\n\
800 You can pass more than 7 arguments; then the first six arguments\n\
801 are used as SECOND through YEAR, and the *last* argument is used as ZONE.\n\
802 The intervening arguments are ignored.\n\
803 This feature lets (apply 'encode-time (decode-time ...)) work.\n\
805 Out-of-range values for SEC, MINUTE, HOUR, DAY, or MONTH are allowed;\n\
806 for example, a DAY of 0 means the day preceding the given month.\n\
807 Year numbers less than 100 are treated just like other year numbers.\n\
808 If you want them to stand for years in this century, you must do that yourself.")
811 register Lisp_Object
*args
;
815 Lisp_Object zone
= (nargs
> 6)? args
[nargs
- 1] : Qnil
;
817 CHECK_NUMBER (args
[0], 0); /* second */
818 CHECK_NUMBER (args
[1], 1); /* minute */
819 CHECK_NUMBER (args
[2], 2); /* hour */
820 CHECK_NUMBER (args
[3], 3); /* day */
821 CHECK_NUMBER (args
[4], 4); /* month */
822 CHECK_NUMBER (args
[5], 5); /* year */
824 tm
.tm_sec
= XINT (args
[0]);
825 tm
.tm_min
= XINT (args
[1]);
826 tm
.tm_hour
= XINT (args
[2]);
827 tm
.tm_mday
= XINT (args
[3]);
828 tm
.tm_mon
= XINT (args
[4]) - 1;
829 tm
.tm_year
= XINT (args
[5]) - 1900;
840 char **oldenv
= environ
, **newenv
;
844 else if (STRINGP (zone
))
845 tzstring
= (char *) XSTRING (zone
)->data
;
846 else if (INTEGERP (zone
))
848 int abszone
= abs (XINT (zone
));
849 sprintf (tzbuf
, "XXX%s%d:%02d:%02d", "-" + (XINT (zone
) < 0),
850 abszone
/ (60*60), (abszone
/60) % 60, abszone
% 60);
854 error ("Invalid time zone specification");
856 /* Set TZ before calling mktime; merely adjusting mktime's returned
857 value doesn't suffice, since that would mishandle leap seconds. */
858 set_time_zone_rule (tzstring
);
862 /* Restore TZ to previous value. */
866 #ifdef LOCALTIME_CACHE
871 if (time
== (time_t) -1)
872 error ("Specified time is not representable");
874 return make_time (time
);
877 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
878 "Return the current time, as a human-readable string.\n\
879 Programs can use this function to decode a time,\n\
880 since the number of columns in each field is fixed.\n\
881 The format is `Sun Sep 16 01:03:52 1973'.\n\
882 If an argument is given, it specifies a time to format\n\
883 instead of the current time. The argument should have the form:\n\
886 (HIGH LOW . IGNORED).\n\
887 Thus, you can use times obtained from `current-time'\n\
888 and from `file-attributes'.")
890 Lisp_Object specified_time
;
896 if (! lisp_time_argument (specified_time
, &value
))
898 tem
= (char *) ctime (&value
);
900 strncpy (buf
, tem
, 24);
903 return build_string (buf
);
906 #define TM_YEAR_BASE 1900
908 /* Yield A - B, measured in seconds.
909 This function is copied from the GNU C Library. */
914 /* Compute intervening leap days correctly even if year is negative.
915 Take care to avoid int overflow in leap day calculations,
916 but it's OK to assume that A and B are close to each other. */
917 int a4
= (a
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (a
->tm_year
& 3);
918 int b4
= (b
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (b
->tm_year
& 3);
919 int a100
= a4
/ 25 - (a4
% 25 < 0);
920 int b100
= b4
/ 25 - (b4
% 25 < 0);
921 int a400
= a100
>> 2;
922 int b400
= b100
>> 2;
923 int intervening_leap_days
= (a4
- b4
) - (a100
- b100
) + (a400
- b400
);
924 int years
= a
->tm_year
- b
->tm_year
;
925 int days
= (365 * years
+ intervening_leap_days
926 + (a
->tm_yday
- b
->tm_yday
));
927 return (60 * (60 * (24 * days
+ (a
->tm_hour
- b
->tm_hour
))
928 + (a
->tm_min
- b
->tm_min
))
929 + (a
->tm_sec
- b
->tm_sec
));
932 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
933 "Return the offset and name for the local time zone.\n\
934 This returns a list of the form (OFFSET NAME).\n\
935 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
936 A negative value means west of Greenwich.\n\
937 NAME is a string giving the name of the time zone.\n\
938 If an argument is given, it specifies when the time zone offset is determined\n\
939 instead of using the current time. The argument should have the form:\n\
942 (HIGH LOW . IGNORED).\n\
943 Thus, you can use times obtained from `current-time'\n\
944 and from `file-attributes'.\n\
946 Some operating systems cannot provide all this information to Emacs;\n\
947 in this case, `current-time-zone' returns a list containing nil for\n\
948 the data it can't find.")
950 Lisp_Object specified_time
;
955 if (lisp_time_argument (specified_time
, &value
)
956 && (t
= gmtime (&value
)) != 0)
962 gmt
= *t
; /* Make a copy, in case localtime modifies *t. */
963 t
= localtime (&value
);
964 offset
= tm_diff (t
, &gmt
);
968 s
= (char *)t
->tm_zone
;
969 #else /* not HAVE_TM_ZONE */
971 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
972 s
= tzname
[t
->tm_isdst
];
974 #endif /* not HAVE_TM_ZONE */
977 /* No local time zone name is available; use "+-NNNN" instead. */
978 int am
= (offset
< 0 ? -offset
: offset
) / 60;
979 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
982 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
985 return Fmake_list (2, Qnil
);
988 /* This holds the value of `environ' produced by the previous
989 call to Fset_time_zone_rule, or 0 if Fset_time_zone_rule
990 has never been called. */
991 static char **environbuf
;
993 DEFUN ("set-time-zone-rule", Fset_time_zone_rule
, Sset_time_zone_rule
, 1, 1, 0,
994 "Set the local time zone using TZ, a string specifying a time zone rule.\n\
995 If TZ is nil, use implementation-defined default time zone information.\n\
996 If TZ is t, use Universal Time.")
1008 CHECK_STRING (tz
, 0);
1009 tzstring
= (char *) XSTRING (tz
)->data
;
1012 set_time_zone_rule (tzstring
);
1015 environbuf
= environ
;
1020 /* These two values are known to load tz files in buggy implementations.
1021 Their values shouldn't matter in non-buggy implementations.
1022 We don't use string literals for these strings,
1023 since if a string in the environment is in readonly
1024 storage, it runs afoul of bugs in SVR4 and Solaris 2.3.
1025 See Sun bugs 1113095 and 1114114, ``Timezone routines
1026 improperly modify environment''. */
1028 static char set_time_zone_rule_tz1
[] = "TZ=GMT0";
1029 static char set_time_zone_rule_tz2
[] = "TZ=GMT1";
1031 /* Set the local time zone rule to TZSTRING.
1032 This allocates memory into `environ', which it is the caller's
1033 responsibility to free. */
1035 set_time_zone_rule (tzstring
)
1039 char **from
, **to
, **newenv
;
1041 /* Make the ENVIRON vector longer with room for TZSTRING. */
1042 for (from
= environ
; *from
; from
++)
1044 envptrs
= from
- environ
+ 2;
1045 newenv
= to
= (char **) xmalloc (envptrs
* sizeof (char *)
1046 + (tzstring
? strlen (tzstring
) + 4 : 0));
1048 /* Add TZSTRING to the end of environ, as a value for TZ. */
1051 char *t
= (char *) (to
+ envptrs
);
1053 strcat (t
, tzstring
);
1057 /* Copy the old environ vector elements into NEWENV,
1058 but don't copy the TZ variable.
1059 So we have only one definition of TZ, which came from TZSTRING. */
1060 for (from
= environ
; *from
; from
++)
1061 if (strncmp (*from
, "TZ=", 3) != 0)
1067 /* If we do have a TZSTRING, NEWENV points to the vector slot where
1068 the TZ variable is stored. If we do not have a TZSTRING,
1069 TO points to the vector slot which has the terminating null. */
1071 #ifdef LOCALTIME_CACHE
1073 /* In SunOS 4.1.3_U1 and 4.1.4, if TZ has a value like
1074 "US/Pacific" that loads a tz file, then changes to a value like
1075 "XXX0" that does not load a tz file, and then changes back to
1076 its original value, the last change is (incorrectly) ignored.
1077 Also, if TZ changes twice in succession to values that do
1078 not load a tz file, tzset can dump core (see Sun bug#1225179).
1079 The following code works around these bugs. */
1083 /* Temporarily set TZ to a value that loads a tz file
1084 and that differs from tzstring. */
1086 *newenv
= (strcmp (tzstring
, set_time_zone_rule_tz1
+ 3) == 0
1087 ? set_time_zone_rule_tz2
: set_time_zone_rule_tz1
);
1093 /* The implied tzstring is unknown, so temporarily set TZ to
1094 two different values that each load a tz file. */
1095 *to
= set_time_zone_rule_tz1
;
1098 *to
= set_time_zone_rule_tz2
;
1103 /* Now TZ has the desired value, and tzset can be invoked safely. */
1118 /* Callers passing one argument to Finsert need not gcpro the
1119 argument "array", since the only element of the array will
1120 not be used after calling insert or insert_from_string, so
1121 we don't care if it gets trashed. */
1123 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
1124 "Insert the arguments, either strings or characters, at point.\n\
1125 Point moves forward so that it ends up after the inserted text.\n\
1126 Any other markers at the point of insertion remain before the text.")
1129 register Lisp_Object
*args
;
1131 register int argnum
;
1132 register Lisp_Object tem
;
1135 for (argnum
= 0; argnum
< nargs
; argnum
++)
1141 str
[0] = XINT (tem
);
1144 else if (STRINGP (tem
))
1146 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 0);
1150 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
1158 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
1160 "Insert the arguments at point, inheriting properties from adjoining text.\n\
1161 Point moves forward so that it ends up after the inserted text.\n\
1162 Any other markers at the point of insertion remain before the text.")
1165 register Lisp_Object
*args
;
1167 register int argnum
;
1168 register Lisp_Object tem
;
1171 for (argnum
= 0; argnum
< nargs
; argnum
++)
1177 str
[0] = XINT (tem
);
1178 insert_and_inherit (str
, 1);
1180 else if (STRINGP (tem
))
1182 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 1);
1186 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
1194 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
1195 "Insert strings or characters at point, relocating markers after the text.\n\
1196 Point moves forward so that it ends up after the inserted text.\n\
1197 Any other markers at the point of insertion also end up after the text.")
1200 register Lisp_Object
*args
;
1202 register int argnum
;
1203 register Lisp_Object tem
;
1206 for (argnum
= 0; argnum
< nargs
; argnum
++)
1212 str
[0] = XINT (tem
);
1213 insert_before_markers (str
, 1);
1215 else if (STRINGP (tem
))
1217 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 0);
1221 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
1229 DEFUN ("insert-before-markers-and-inherit", Finsert_and_inherit_before_markers
,
1230 Sinsert_and_inherit_before_markers
, 0, MANY
, 0,
1231 "Insert text at point, relocating markers and inheriting properties.\n\
1232 Point moves forward so that it ends up after the inserted text.\n\
1233 Any other markers at the point of insertion also end up after the text.")
1236 register Lisp_Object
*args
;
1238 register int argnum
;
1239 register Lisp_Object tem
;
1242 for (argnum
= 0; argnum
< nargs
; argnum
++)
1248 str
[0] = XINT (tem
);
1249 insert_before_markers_and_inherit (str
, 1);
1251 else if (STRINGP (tem
))
1253 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 1);
1257 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
1265 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 3, 0,
1266 "Insert COUNT (second arg) copies of CHARACTER (first arg).\n\
1267 Point and all markers are affected as in the function `insert'.\n\
1268 Both arguments are required.\n\
1269 The optional third arg INHERIT, if non-nil, says to inherit text properties\n\
1270 from adjoining text, if those properties are sticky.")
1271 (character
, count
, inherit
)
1272 Lisp_Object character
, count
, inherit
;
1274 register unsigned char *string
;
1275 register int strlen
;
1278 CHECK_NUMBER (character
, 0);
1279 CHECK_NUMBER (count
, 1);
1284 strlen
= min (n
, 256);
1285 string
= (unsigned char *) alloca (strlen
);
1286 for (i
= 0; i
< strlen
; i
++)
1287 string
[i
] = XFASTINT (character
);
1290 if (!NILP (inherit
))
1291 insert_and_inherit (string
, strlen
);
1293 insert (string
, strlen
);
1298 if (!NILP (inherit
))
1299 insert_and_inherit (string
, n
);
1307 /* Making strings from buffer contents. */
1309 /* Return a Lisp_String containing the text of the current buffer from
1310 START to END. If text properties are in use and the current buffer
1311 has properties in the range specified, the resulting string will also
1312 have them, if PROPS is nonzero.
1314 We don't want to use plain old make_string here, because it calls
1315 make_uninit_string, which can cause the buffer arena to be
1316 compacted. make_string has no way of knowing that the data has
1317 been moved, and thus copies the wrong data into the string. This
1318 doesn't effect most of the other users of make_string, so it should
1319 be left as is. But we should use this function when conjuring
1320 buffer substrings. */
1323 make_buffer_string (start
, end
, props
)
1327 Lisp_Object result
, tem
, tem1
;
1329 if (start
< GPT
&& GPT
< end
)
1332 result
= make_uninit_string (end
- start
);
1333 bcopy (&FETCH_CHAR (start
), XSTRING (result
)->data
, end
- start
);
1335 /* If desired, update and copy the text properties. */
1336 #ifdef USE_TEXT_PROPERTIES
1339 update_buffer_properties (start
, end
);
1341 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
1342 tem1
= Ftext_properties_at (make_number (start
), Qnil
);
1344 if (XINT (tem
) != end
|| !NILP (tem1
))
1345 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
1352 /* Call Vbuffer_access_fontify_functions for the range START ... END
1353 in the current buffer, if necessary. */
1356 update_buffer_properties (start
, end
)
1359 #ifdef USE_TEXT_PROPERTIES
1360 /* If this buffer has some access functions,
1361 call them, specifying the range of the buffer being accessed. */
1362 if (!NILP (Vbuffer_access_fontify_functions
))
1364 Lisp_Object args
[3];
1367 args
[0] = Qbuffer_access_fontify_functions
;
1368 XSETINT (args
[1], start
);
1369 XSETINT (args
[2], end
);
1371 /* But don't call them if we can tell that the work
1372 has already been done. */
1373 if (!NILP (Vbuffer_access_fontified_property
))
1375 tem
= Ftext_property_any (args
[1], args
[2],
1376 Vbuffer_access_fontified_property
,
1379 Frun_hook_with_args (3, args
);
1382 Frun_hook_with_args (3, args
);
1387 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
1388 "Return the contents of part of the current buffer as a string.\n\
1389 The two arguments START and END are character positions;\n\
1390 they can be in either order.")
1392 Lisp_Object start
, end
;
1396 validate_region (&start
, &end
);
1400 return make_buffer_string (b
, e
, 1);
1403 DEFUN ("buffer-substring-no-properties", Fbuffer_substring_no_properties
,
1404 Sbuffer_substring_no_properties
, 2, 2, 0,
1405 "Return the characters of part of the buffer, without the text properties.\n\
1406 The two arguments START and END are character positions;\n\
1407 they can be in either order.")
1409 Lisp_Object start
, end
;
1413 validate_region (&start
, &end
);
1417 return make_buffer_string (b
, e
, 0);
1420 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
1421 "Return the contents of the current buffer as a string.\n\
1422 If narrowing is in effect, this function returns only the visible part\n\
1426 return make_buffer_string (BEGV
, ZV
, 1);
1429 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
1431 "Insert before point a substring of the contents of buffer BUFFER.\n\
1432 BUFFER may be a buffer or a buffer name.\n\
1433 Arguments START and END are character numbers specifying the substring.\n\
1434 They default to the beginning and the end of BUFFER.")
1436 Lisp_Object buf
, start
, end
;
1438 register int b
, e
, temp
;
1439 register struct buffer
*bp
, *obuf
;
1442 buffer
= Fget_buffer (buf
);
1445 bp
= XBUFFER (buffer
);
1446 if (NILP (bp
->name
))
1447 error ("Selecting deleted buffer");
1453 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1460 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1465 temp
= b
, b
= e
, e
= temp
;
1467 if (!(BUF_BEGV (bp
) <= b
&& e
<= BUF_ZV (bp
)))
1468 args_out_of_range (start
, end
);
1470 obuf
= current_buffer
;
1471 set_buffer_internal_1 (bp
);
1472 update_buffer_properties (b
, e
);
1473 set_buffer_internal_1 (obuf
);
1475 insert_from_buffer (bp
, b
, e
- b
, 0);
1479 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
1481 "Compare two substrings of two buffers; return result as number.\n\
1482 the value is -N if first string is less after N-1 chars,\n\
1483 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
1484 Each substring is represented as three arguments: BUFFER, START and END.\n\
1485 That makes six args in all, three for each substring.\n\n\
1486 The value of `case-fold-search' in the current buffer\n\
1487 determines whether case is significant or ignored.")
1488 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
1489 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
1491 register int begp1
, endp1
, begp2
, endp2
, temp
, len1
, len2
, length
, i
;
1492 register struct buffer
*bp1
, *bp2
;
1493 register Lisp_Object
*trt
1494 = (!NILP (current_buffer
->case_fold_search
)
1495 ? XCHAR_TABLE (current_buffer
->case_canon_table
)->contents
: 0);
1497 /* Find the first buffer and its substring. */
1500 bp1
= current_buffer
;
1504 buf1
= Fget_buffer (buffer1
);
1507 bp1
= XBUFFER (buf1
);
1508 if (NILP (bp1
->name
))
1509 error ("Selecting deleted buffer");
1513 begp1
= BUF_BEGV (bp1
);
1516 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
1517 begp1
= XINT (start1
);
1520 endp1
= BUF_ZV (bp1
);
1523 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
1524 endp1
= XINT (end1
);
1528 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
1530 if (!(BUF_BEGV (bp1
) <= begp1
1532 && endp1
<= BUF_ZV (bp1
)))
1533 args_out_of_range (start1
, end1
);
1535 /* Likewise for second substring. */
1538 bp2
= current_buffer
;
1542 buf2
= Fget_buffer (buffer2
);
1545 bp2
= XBUFFER (buf2
);
1546 if (NILP (bp2
->name
))
1547 error ("Selecting deleted buffer");
1551 begp2
= BUF_BEGV (bp2
);
1554 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
1555 begp2
= XINT (start2
);
1558 endp2
= BUF_ZV (bp2
);
1561 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
1562 endp2
= XINT (end2
);
1566 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
1568 if (!(BUF_BEGV (bp2
) <= begp2
1570 && endp2
<= BUF_ZV (bp2
)))
1571 args_out_of_range (start2
, end2
);
1573 len1
= endp1
- begp1
;
1574 len2
= endp2
- begp2
;
1579 for (i
= 0; i
< length
; i
++)
1581 int c1
= *BUF_CHAR_ADDRESS (bp1
, begp1
+ i
);
1582 int c2
= *BUF_CHAR_ADDRESS (bp2
, begp2
+ i
);
1589 return make_number (- 1 - i
);
1591 return make_number (i
+ 1);
1594 /* The strings match as far as they go.
1595 If one is shorter, that one is less. */
1597 return make_number (length
+ 1);
1598 else if (length
< len2
)
1599 return make_number (- length
- 1);
1601 /* Same length too => they are equal. */
1602 return make_number (0);
1606 subst_char_in_region_unwind (arg
)
1609 return current_buffer
->undo_list
= arg
;
1613 subst_char_in_region_unwind_1 (arg
)
1616 return current_buffer
->filename
= arg
;
1619 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
1620 Ssubst_char_in_region
, 4, 5, 0,
1621 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
1622 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
1623 and don't mark the buffer as really changed.")
1624 (start
, end
, fromchar
, tochar
, noundo
)
1625 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
1627 register int pos
, stop
, look
;
1629 int count
= specpdl_ptr
- specpdl
;
1631 validate_region (&start
, &end
);
1632 CHECK_NUMBER (fromchar
, 2);
1633 CHECK_NUMBER (tochar
, 3);
1637 look
= XINT (fromchar
);
1639 /* If we don't want undo, turn off putting stuff on the list.
1640 That's faster than getting rid of things,
1641 and it prevents even the entry for a first change.
1642 Also inhibit locking the file. */
1645 record_unwind_protect (subst_char_in_region_unwind
,
1646 current_buffer
->undo_list
);
1647 current_buffer
->undo_list
= Qt
;
1648 /* Don't do file-locking. */
1649 record_unwind_protect (subst_char_in_region_unwind_1
,
1650 current_buffer
->filename
);
1651 current_buffer
->filename
= Qnil
;
1656 if (FETCH_CHAR (pos
) == look
)
1660 modify_region (current_buffer
, XINT (start
), stop
);
1662 if (! NILP (noundo
))
1664 if (MODIFF
- 1 == SAVE_MODIFF
)
1666 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
1667 current_buffer
->auto_save_modified
++;
1674 record_change (pos
, 1);
1675 FETCH_CHAR (pos
) = XINT (tochar
);
1681 signal_after_change (XINT (start
),
1682 stop
- XINT (start
), stop
- XINT (start
));
1684 unbind_to (count
, Qnil
);
1688 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
1689 "From START to END, translate characters according to TABLE.\n\
1690 TABLE is a string; the Nth character in it is the mapping\n\
1691 for the character with code N. Returns the number of characters changed.")
1695 register Lisp_Object table
;
1697 register int pos
, stop
; /* Limits of the region. */
1698 register unsigned char *tt
; /* Trans table. */
1699 register int oc
; /* Old character. */
1700 register int nc
; /* New character. */
1701 int cnt
; /* Number of changes made. */
1702 Lisp_Object z
; /* Return. */
1703 int size
; /* Size of translate table. */
1705 validate_region (&start
, &end
);
1706 CHECK_STRING (table
, 2);
1708 size
= XSTRING (table
)->size
;
1709 tt
= XSTRING (table
)->data
;
1713 modify_region (current_buffer
, pos
, stop
);
1716 for (; pos
< stop
; ++pos
)
1718 oc
= FETCH_CHAR (pos
);
1724 record_change (pos
, 1);
1725 FETCH_CHAR (pos
) = nc
;
1726 signal_after_change (pos
, 1, 1);
1732 XSETFASTINT (z
, cnt
);
1736 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
1737 "Delete the text between point and mark.\n\
1738 When called from a program, expects two arguments,\n\
1739 positions (integers or markers) specifying the stretch to be deleted.")
1741 Lisp_Object start
, end
;
1743 validate_region (&start
, &end
);
1744 del_range (XINT (start
), XINT (end
));
1748 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
1749 "Remove restrictions (narrowing) from current buffer.\n\
1750 This allows the buffer's full text to be seen and edited.")
1754 SET_BUF_ZV (current_buffer
, Z
);
1755 current_buffer
->clip_changed
= 1;
1756 /* Changing the buffer bounds invalidates any recorded current column. */
1757 invalidate_current_column ();
1761 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
1762 "Restrict editing in this buffer to the current region.\n\
1763 The rest of the text becomes temporarily invisible and untouchable\n\
1764 but is not deleted; if you save the buffer in a file, the invisible\n\
1765 text is included in the file. \\[widen] makes all visible again.\n\
1766 See also `save-restriction'.\n\
1768 When calling from a program, pass two arguments; positions (integers\n\
1769 or markers) bounding the text that should remain visible.")
1771 register Lisp_Object start
, end
;
1773 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1774 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1776 if (XINT (start
) > XINT (end
))
1779 tem
= start
; start
= end
; end
= tem
;
1782 if (!(BEG
<= XINT (start
) && XINT (start
) <= XINT (end
) && XINT (end
) <= Z
))
1783 args_out_of_range (start
, end
);
1785 BEGV
= XFASTINT (start
);
1786 SET_BUF_ZV (current_buffer
, XFASTINT (end
));
1787 if (PT
< XFASTINT (start
))
1788 SET_PT (XFASTINT (start
));
1789 if (PT
> XFASTINT (end
))
1790 SET_PT (XFASTINT (end
));
1791 current_buffer
->clip_changed
= 1;
1792 /* Changing the buffer bounds invalidates any recorded current column. */
1793 invalidate_current_column ();
1798 save_restriction_save ()
1800 register Lisp_Object bottom
, top
;
1801 /* Note: I tried using markers here, but it does not win
1802 because insertion at the end of the saved region
1803 does not advance mh and is considered "outside" the saved region. */
1804 XSETFASTINT (bottom
, BEGV
- BEG
);
1805 XSETFASTINT (top
, Z
- ZV
);
1807 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
1811 save_restriction_restore (data
)
1814 register struct buffer
*buf
;
1815 register int newhead
, newtail
;
1816 register Lisp_Object tem
;
1818 buf
= XBUFFER (XCONS (data
)->car
);
1820 data
= XCONS (data
)->cdr
;
1822 tem
= XCONS (data
)->car
;
1823 newhead
= XINT (tem
);
1824 tem
= XCONS (data
)->cdr
;
1825 newtail
= XINT (tem
);
1826 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1831 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1832 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1833 current_buffer
->clip_changed
= 1;
1835 /* If point is outside the new visible range, move it inside. */
1837 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1842 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1843 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1844 The buffer's restrictions make parts of the beginning and end invisible.\n\
1845 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1846 This special form, `save-restriction', saves the current buffer's restrictions\n\
1847 when it is entered, and restores them when it is exited.\n\
1848 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1849 The old restrictions settings are restored\n\
1850 even in case of abnormal exit (throw or error).\n\
1852 The value returned is the value of the last form in BODY.\n\
1854 `save-restriction' can get confused if, within the BODY, you widen\n\
1855 and then make changes outside the area within the saved restrictions.\n\
1857 Note: if you are using both `save-excursion' and `save-restriction',\n\
1858 use `save-excursion' outermost:\n\
1859 (save-excursion (save-restriction ...))")
1863 register Lisp_Object val
;
1864 int count
= specpdl_ptr
- specpdl
;
1866 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1867 val
= Fprogn (body
);
1868 return unbind_to (count
, val
);
1871 /* Buffer for the most recent text displayed by Fmessage. */
1872 static char *message_text
;
1874 /* Allocated length of that buffer. */
1875 static int message_length
;
1877 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
1878 "Print a one-line message at the bottom of the screen.\n\
1879 The first argument is a format control string, and the rest are data\n\
1880 to be formatted under control of the string. See `format' for details.\n\
1882 If the first argument is nil, clear any existing message; let the\n\
1883 minibuffer contents show.")
1895 register Lisp_Object val
;
1896 val
= Fformat (nargs
, args
);
1897 /* Copy the data so that it won't move when we GC. */
1900 message_text
= (char *)xmalloc (80);
1901 message_length
= 80;
1903 if (XSTRING (val
)->size
> message_length
)
1905 message_length
= XSTRING (val
)->size
;
1906 message_text
= (char *)xrealloc (message_text
, message_length
);
1908 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
1909 message2 (message_text
, XSTRING (val
)->size
);
1914 DEFUN ("message-box", Fmessage_box
, Smessage_box
, 1, MANY
, 0,
1915 "Display a message, in a dialog box if possible.\n\
1916 If a dialog box is not available, use the echo area.\n\
1917 The first argument is a format control string, and the rest are data\n\
1918 to be formatted under control of the string. See `format' for details.\n\
1920 If the first argument is nil, clear any existing message; let the\n\
1921 minibuffer contents show.")
1933 register Lisp_Object val
;
1934 val
= Fformat (nargs
, args
);
1937 Lisp_Object pane
, menu
, obj
;
1938 struct gcpro gcpro1
;
1939 pane
= Fcons (Fcons (build_string ("OK"), Qt
), Qnil
);
1941 menu
= Fcons (val
, pane
);
1942 obj
= Fx_popup_dialog (Qt
, menu
);
1946 #else /* not HAVE_MENUS */
1947 /* Copy the data so that it won't move when we GC. */
1950 message_text
= (char *)xmalloc (80);
1951 message_length
= 80;
1953 if (XSTRING (val
)->size
> message_length
)
1955 message_length
= XSTRING (val
)->size
;
1956 message_text
= (char *)xrealloc (message_text
, message_length
);
1958 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
1959 message2 (message_text
, XSTRING (val
)->size
);
1961 #endif /* not HAVE_MENUS */
1965 extern Lisp_Object last_nonmenu_event
;
1968 DEFUN ("message-or-box", Fmessage_or_box
, Smessage_or_box
, 1, MANY
, 0,
1969 "Display a message in a dialog box or in the echo area.\n\
1970 If this command was invoked with the mouse, use a dialog box.\n\
1971 Otherwise, use the echo area.\n\
1972 The first argument is a format control string, and the rest are data\n\
1973 to be formatted under control of the string. See `format' for details.\n\
1975 If the first argument is nil, clear any existing message; let the\n\
1976 minibuffer contents show.")
1982 if (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
1983 return Fmessage_box (nargs
, args
);
1985 return Fmessage (nargs
, args
);
1988 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
1989 "Format a string out of a control-string and arguments.\n\
1990 The first argument is a control string.\n\
1991 The other arguments are substituted into it to make the result, a string.\n\
1992 It may contain %-sequences meaning to substitute the next argument.\n\
1993 %s means print a string argument. Actually, prints any object, with `princ'.\n\
1994 %d means print as number in decimal (%o octal, %x hex).\n\
1995 %e means print a number in exponential notation.\n\
1996 %f means print a number in decimal-point notation.\n\
1997 %g means print a number in exponential notation\n\
1998 or decimal-point notation, whichever uses fewer characters.\n\
1999 %c means print a number as a single character.\n\
2000 %S means print any object as an s-expression (using prin1).\n\
2001 The argument used for %d, %o, %x, %e, %f, %g or %c must be a number.\n\
2002 Use %% to put a single % into the output.")
2005 register Lisp_Object
*args
;
2007 register int n
; /* The number of the next arg to substitute */
2008 register int total
= 5; /* An estimate of the final length */
2010 register unsigned char *format
, *end
;
2012 extern char *index ();
2013 /* It should not be necessary to GCPRO ARGS, because
2014 the caller in the interpreter should take care of that. */
2016 CHECK_STRING (args
[0], 0);
2017 format
= XSTRING (args
[0])->data
;
2018 end
= format
+ XSTRING (args
[0])->size
;
2021 while (format
!= end
)
2022 if (*format
++ == '%')
2026 /* Process a numeric arg and skip it. */
2027 minlen
= atoi (format
);
2031 while ((*format
>= '0' && *format
<= '9')
2032 || *format
== '-' || *format
== ' ' || *format
== '.')
2037 else if (++n
>= nargs
)
2038 error ("Not enough arguments for format string");
2039 else if (*format
== 'S')
2041 /* For `S', prin1 the argument and then treat like a string. */
2042 register Lisp_Object tem
;
2043 tem
= Fprin1_to_string (args
[n
], Qnil
);
2047 else if (SYMBOLP (args
[n
]))
2049 XSETSTRING (args
[n
], XSYMBOL (args
[n
])->name
);
2052 else if (STRINGP (args
[n
]))
2055 if (*format
!= 's' && *format
!= 'S')
2056 error ("format specifier doesn't match argument type");
2057 total
+= XSTRING (args
[n
])->size
;
2058 /* We have to put an arbitrary limit on minlen
2059 since otherwise it could make alloca fail. */
2060 if (minlen
< XSTRING (args
[n
])->size
+ 1000)
2063 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
2064 else if (INTEGERP (args
[n
]) && *format
!= 's')
2066 #ifdef LISP_FLOAT_TYPE
2067 /* The following loop assumes the Lisp type indicates
2068 the proper way to pass the argument.
2069 So make sure we have a flonum if the argument should
2071 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
2072 args
[n
] = Ffloat (args
[n
]);
2075 /* We have to put an arbitrary limit on minlen
2076 since otherwise it could make alloca fail. */
2080 #ifdef LISP_FLOAT_TYPE
2081 else if (FLOATP (args
[n
]) && *format
!= 's')
2083 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
2084 args
[n
] = Ftruncate (args
[n
]);
2086 /* We have to put an arbitrary limit on minlen
2087 since otherwise it could make alloca fail. */
2094 /* Anything but a string, convert to a string using princ. */
2095 register Lisp_Object tem
;
2096 tem
= Fprin1_to_string (args
[n
], Qt
);
2103 register int nstrings
= n
+ 1;
2105 /* Allocate twice as many strings as we have %-escapes; floats occupy
2106 two slots, and we're not sure how many of those we have. */
2107 register unsigned char **strings
2108 = (unsigned char **) alloca (2 * nstrings
* sizeof (unsigned char *));
2112 for (n
= 0; n
< nstrings
; n
++)
2115 strings
[i
++] = (unsigned char *) "";
2116 else if (INTEGERP (args
[n
]))
2117 /* We checked above that the corresponding format effector
2118 isn't %s, which would cause MPV. */
2119 strings
[i
++] = (unsigned char *) XINT (args
[n
]);
2120 #ifdef LISP_FLOAT_TYPE
2121 else if (FLOATP (args
[n
]))
2123 union { double d
; char *half
[2]; } u
;
2125 u
.d
= XFLOAT (args
[n
])->data
;
2126 strings
[i
++] = (unsigned char *) u
.half
[0];
2127 strings
[i
++] = (unsigned char *) u
.half
[1];
2131 /* The first string is treated differently
2132 because it is the format string. */
2133 strings
[i
++] = XSTRING (args
[n
])->data
;
2135 strings
[i
++] = (unsigned char *) XSTRING (args
[n
]);
2138 /* Make room in result for all the non-%-codes in the control string. */
2139 total
+= XSTRING (args
[0])->size
;
2141 /* Format it in bigger and bigger buf's until it all fits. */
2144 buf
= (char *) alloca (total
+ 1);
2147 length
= doprnt_lisp (buf
, total
+ 1, strings
[0],
2148 end
, i
-1, strings
+ 1);
2149 if (buf
[total
- 1] == 0)
2157 return make_string (buf
, length
);
2163 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
2164 EMACS_INT arg0
, arg1
, arg2
, arg3
, arg4
;
2178 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, args
);
2180 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, &string1
+ 1);
2182 return build_string (buf
);
2185 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
2186 "Return t if two characters match, optionally ignoring case.\n\
2187 Both arguments must be characters (i.e. integers).\n\
2188 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
2190 register Lisp_Object c1
, c2
;
2192 Lisp_Object
*downcase
= DOWNCASE_TABLE
;
2193 CHECK_NUMBER (c1
, 0);
2194 CHECK_NUMBER (c2
, 1);
2196 if (!NILP (current_buffer
->case_fold_search
)
2197 ? ((XINT (downcase
[0xff & XFASTINT (c1
)])
2198 == XINT (downcase
[0xff & XFASTINT (c2
)]))
2199 && (XFASTINT (c1
) & ~0xff) == (XFASTINT (c2
) & ~0xff))
2200 : XINT (c1
) == XINT (c2
))
2205 /* Transpose the markers in two regions of the current buffer, and
2206 adjust the ones between them if necessary (i.e.: if the regions
2209 Traverses the entire marker list of the buffer to do so, adding an
2210 appropriate amount to some, subtracting from some, and leaving the
2211 rest untouched. Most of this is copied from adjust_markers in insdel.c.
2213 It's the caller's job to see that (start1 <= end1 <= start2 <= end2). */
2216 transpose_markers (start1
, end1
, start2
, end2
)
2217 register int start1
, end1
, start2
, end2
;
2219 register int amt1
, amt2
, diff
, mpos
;
2220 register Lisp_Object marker
;
2222 /* Update point as if it were a marker. */
2226 TEMP_SET_PT (PT
+ (end2
- end1
));
2227 else if (PT
< start2
)
2228 TEMP_SET_PT (PT
+ (end2
- start2
) - (end1
- start1
));
2230 TEMP_SET_PT (PT
- (start2
- start1
));
2232 /* We used to adjust the endpoints here to account for the gap, but that
2233 isn't good enough. Even if we assume the caller has tried to move the
2234 gap out of our way, it might still be at start1 exactly, for example;
2235 and that places it `inside' the interval, for our purposes. The amount
2236 of adjustment is nontrivial if there's a `denormalized' marker whose
2237 position is between GPT and GPT + GAP_SIZE, so it's simpler to leave
2238 the dirty work to Fmarker_position, below. */
2240 /* The difference between the region's lengths */
2241 diff
= (end2
- start2
) - (end1
- start1
);
2243 /* For shifting each marker in a region by the length of the other
2244 * region plus the distance between the regions.
2246 amt1
= (end2
- start2
) + (start2
- end1
);
2247 amt2
= (end1
- start1
) + (start2
- end1
);
2249 for (marker
= BUF_MARKERS (current_buffer
); !NILP (marker
);
2250 marker
= XMARKER (marker
)->chain
)
2252 mpos
= Fmarker_position (marker
);
2253 if (mpos
>= start1
&& mpos
< end2
)
2257 else if (mpos
< start2
)
2261 if (mpos
> GPT
) mpos
+= GAP_SIZE
;
2262 XMARKER (marker
)->bufpos
= mpos
;
2267 DEFUN ("transpose-regions", Ftranspose_regions
, Stranspose_regions
, 4, 5, 0,
2268 "Transpose region START1 to END1 with START2 to END2.\n\
2269 The regions may not be overlapping, because the size of the buffer is\n\
2270 never changed in a transposition.\n\
2272 Optional fifth arg LEAVE_MARKERS, if non-nil, means don't transpose\n\
2273 any markers that happen to be located in the regions.\n\
2275 Transposing beyond buffer boundaries is an error.")
2276 (startr1
, endr1
, startr2
, endr2
, leave_markers
)
2277 Lisp_Object startr1
, endr1
, startr2
, endr2
, leave_markers
;
2279 register int start1
, end1
, start2
, end2
,
2280 gap
, len1
, len_mid
, len2
;
2281 unsigned char *start1_addr
, *start2_addr
, *temp
;
2283 #ifdef USE_TEXT_PROPERTIES
2284 INTERVAL cur_intv
, tmp_interval1
, tmp_interval_mid
, tmp_interval2
;
2285 cur_intv
= BUF_INTERVALS (current_buffer
);
2286 #endif /* USE_TEXT_PROPERTIES */
2288 validate_region (&startr1
, &endr1
);
2289 validate_region (&startr2
, &endr2
);
2291 start1
= XFASTINT (startr1
);
2292 end1
= XFASTINT (endr1
);
2293 start2
= XFASTINT (startr2
);
2294 end2
= XFASTINT (endr2
);
2297 /* Swap the regions if they're reversed. */
2300 register int glumph
= start1
;
2308 len1
= end1
- start1
;
2309 len2
= end2
- start2
;
2312 error ("transposed regions not properly ordered");
2313 else if (start1
== end1
|| start2
== end2
)
2314 error ("transposed region may not be of length 0");
2316 /* The possibilities are:
2317 1. Adjacent (contiguous) regions, or separate but equal regions
2318 (no, really equal, in this case!), or
2319 2. Separate regions of unequal size.
2321 The worst case is usually No. 2. It means that (aside from
2322 potential need for getting the gap out of the way), there also
2323 needs to be a shifting of the text between the two regions. So
2324 if they are spread far apart, we are that much slower... sigh. */
2326 /* It must be pointed out that the really studly thing to do would
2327 be not to move the gap at all, but to leave it in place and work
2328 around it if necessary. This would be extremely efficient,
2329 especially considering that people are likely to do
2330 transpositions near where they are working interactively, which
2331 is exactly where the gap would be found. However, such code
2332 would be much harder to write and to read. So, if you are
2333 reading this comment and are feeling squirrely, by all means have
2334 a go! I just didn't feel like doing it, so I will simply move
2335 the gap the minimum distance to get it out of the way, and then
2336 deal with an unbroken array. */
2338 /* Make sure the gap won't interfere, by moving it out of the text
2339 we will operate on. */
2340 if (start1
< gap
&& gap
< end2
)
2342 if (gap
- start1
< end2
- gap
)
2348 /* Hmmm... how about checking to see if the gap is large
2349 enough to use as the temporary storage? That would avoid an
2350 allocation... interesting. Later, don't fool with it now. */
2352 /* Working without memmove, for portability (sigh), so must be
2353 careful of overlapping subsections of the array... */
2355 if (end1
== start2
) /* adjacent regions */
2357 modify_region (current_buffer
, start1
, end2
);
2358 record_change (start1
, len1
+ len2
);
2360 #ifdef USE_TEXT_PROPERTIES
2361 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2362 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2363 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2364 #endif /* USE_TEXT_PROPERTIES */
2366 /* First region smaller than second. */
2369 /* We use alloca only if it is small,
2370 because we want to avoid stack overflow. */
2372 temp
= (unsigned char *) xmalloc (len2
);
2374 temp
= (unsigned char *) alloca (len2
);
2376 /* Don't precompute these addresses. We have to compute them
2377 at the last minute, because the relocating allocator might
2378 have moved the buffer around during the xmalloc. */
2379 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2380 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2382 bcopy (start2_addr
, temp
, len2
);
2383 bcopy (start1_addr
, start1_addr
+ len2
, len1
);
2384 bcopy (temp
, start1_addr
, len2
);
2389 /* First region not smaller than second. */
2392 temp
= (unsigned char *) xmalloc (len1
);
2394 temp
= (unsigned char *) alloca (len1
);
2395 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2396 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2397 bcopy (start1_addr
, temp
, len1
);
2398 bcopy (start2_addr
, start1_addr
, len2
);
2399 bcopy (temp
, start1_addr
+ len2
, len1
);
2403 #ifdef USE_TEXT_PROPERTIES
2404 graft_intervals_into_buffer (tmp_interval1
, start1
+ len2
,
2405 len1
, current_buffer
, 0);
2406 graft_intervals_into_buffer (tmp_interval2
, start1
,
2407 len2
, current_buffer
, 0);
2408 #endif /* USE_TEXT_PROPERTIES */
2410 /* Non-adjacent regions, because end1 != start2, bleagh... */
2414 /* Regions are same size, though, how nice. */
2416 modify_region (current_buffer
, start1
, end1
);
2417 modify_region (current_buffer
, start2
, end2
);
2418 record_change (start1
, len1
);
2419 record_change (start2
, len2
);
2420 #ifdef USE_TEXT_PROPERTIES
2421 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2422 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2423 Fset_text_properties (start1
, end1
, Qnil
, Qnil
);
2424 Fset_text_properties (start2
, end2
, Qnil
, Qnil
);
2425 #endif /* USE_TEXT_PROPERTIES */
2428 temp
= (unsigned char *) xmalloc (len1
);
2430 temp
= (unsigned char *) alloca (len1
);
2431 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2432 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2433 bcopy (start1_addr
, temp
, len1
);
2434 bcopy (start2_addr
, start1_addr
, len2
);
2435 bcopy (temp
, start2_addr
, len1
);
2438 #ifdef USE_TEXT_PROPERTIES
2439 graft_intervals_into_buffer (tmp_interval1
, start2
,
2440 len1
, current_buffer
, 0);
2441 graft_intervals_into_buffer (tmp_interval2
, start1
,
2442 len2
, current_buffer
, 0);
2443 #endif /* USE_TEXT_PROPERTIES */
2446 else if (len1
< len2
) /* Second region larger than first */
2447 /* Non-adjacent & unequal size, area between must also be shifted. */
2449 len_mid
= start2
- end1
;
2450 modify_region (current_buffer
, start1
, end2
);
2451 record_change (start1
, (end2
- start1
));
2452 #ifdef USE_TEXT_PROPERTIES
2453 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2454 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2455 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2456 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2457 #endif /* USE_TEXT_PROPERTIES */
2459 /* holds region 2 */
2461 temp
= (unsigned char *) xmalloc (len2
);
2463 temp
= (unsigned char *) alloca (len2
);
2464 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2465 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2466 bcopy (start2_addr
, temp
, len2
);
2467 bcopy (start1_addr
, start1_addr
+ len_mid
+ len2
, len1
);
2468 safe_bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2469 bcopy (temp
, start1_addr
, len2
);
2472 #ifdef USE_TEXT_PROPERTIES
2473 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2474 len1
, current_buffer
, 0);
2475 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2476 len_mid
, current_buffer
, 0);
2477 graft_intervals_into_buffer (tmp_interval2
, start1
,
2478 len2
, current_buffer
, 0);
2479 #endif /* USE_TEXT_PROPERTIES */
2482 /* Second region smaller than first. */
2484 len_mid
= start2
- end1
;
2485 record_change (start1
, (end2
- start1
));
2486 modify_region (current_buffer
, start1
, end2
);
2488 #ifdef USE_TEXT_PROPERTIES
2489 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2490 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2491 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2492 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2493 #endif /* USE_TEXT_PROPERTIES */
2495 /* holds region 1 */
2497 temp
= (unsigned char *) xmalloc (len1
);
2499 temp
= (unsigned char *) alloca (len1
);
2500 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2501 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2502 bcopy (start1_addr
, temp
, len1
);
2503 bcopy (start2_addr
, start1_addr
, len2
);
2504 bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2505 bcopy (temp
, start1_addr
+ len2
+ len_mid
, len1
);
2508 #ifdef USE_TEXT_PROPERTIES
2509 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2510 len1
, current_buffer
, 0);
2511 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2512 len_mid
, current_buffer
, 0);
2513 graft_intervals_into_buffer (tmp_interval2
, start1
,
2514 len2
, current_buffer
, 0);
2515 #endif /* USE_TEXT_PROPERTIES */
2519 /* todo: this will be slow, because for every transposition, we
2520 traverse the whole friggin marker list. Possible solutions:
2521 somehow get a list of *all* the markers across multiple
2522 transpositions and do it all in one swell phoop. Or maybe modify
2523 Emacs' marker code to keep an ordered list or tree. This might
2524 be nicer, and more beneficial in the long run, but would be a
2525 bunch of work. Plus the way they're arranged now is nice. */
2526 if (NILP (leave_markers
))
2528 transpose_markers (start1
, end1
, start2
, end2
);
2529 fix_overlays_in_range (start1
, end2
);
2541 Qbuffer_access_fontify_functions
2542 = intern ("buffer-access-fontify-functions");
2543 staticpro (&Qbuffer_access_fontify_functions
);
2545 DEFVAR_LISP ("buffer-access-fontify-functions",
2546 &Vbuffer_access_fontify_functions
,
2547 "List of functions called by `buffer-substring' to fontify if necessary.\n\
2548 Each function is called with two arguments which specify the range\n\
2549 of the buffer being accessed.");
2550 Vbuffer_access_fontify_functions
= Qnil
;
2554 extern Lisp_Object Vprin1_to_string_buffer
;
2555 obuf
= Fcurrent_buffer ();
2556 /* Do this here, because init_buffer_once is too early--it won't work. */
2557 Fset_buffer (Vprin1_to_string_buffer
);
2558 /* Make sure buffer-access-fontify-functions is nil in this buffer. */
2559 Fset (Fmake_local_variable (intern ("buffer-access-fontify-functions")),
2564 DEFVAR_LISP ("buffer-access-fontified-property",
2565 &Vbuffer_access_fontified_property
,
2566 "Property which (if non-nil) indicates text has been fontified.\n\
2567 `buffer-substring' need not call the `buffer-access-fontify-functions'\n\
2568 functions if all the text being accessed has this property.");
2569 Vbuffer_access_fontified_property
= Qnil
;
2571 DEFVAR_LISP ("system-name", &Vsystem_name
,
2572 "The name of the machine Emacs is running on.");
2574 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
2575 "The full name of the user logged in.");
2577 DEFVAR_LISP ("user-login-name", &Vuser_login_name
,
2578 "The user's name, taken from environment variables if possible.");
2580 DEFVAR_LISP ("user-real-login-name", &Vuser_real_login_name
,
2581 "The user's name, based upon the real uid only.");
2583 defsubr (&Schar_equal
);
2584 defsubr (&Sgoto_char
);
2585 defsubr (&Sstring_to_char
);
2586 defsubr (&Schar_to_string
);
2587 defsubr (&Sbuffer_substring
);
2588 defsubr (&Sbuffer_substring_no_properties
);
2589 defsubr (&Sbuffer_string
);
2591 defsubr (&Spoint_marker
);
2592 defsubr (&Smark_marker
);
2594 defsubr (&Sregion_beginning
);
2595 defsubr (&Sregion_end
);
2596 /* defsubr (&Smark); */
2597 /* defsubr (&Sset_mark); */
2598 defsubr (&Ssave_excursion
);
2599 defsubr (&Ssave_current_buffer
);
2601 defsubr (&Sbufsize
);
2602 defsubr (&Spoint_max
);
2603 defsubr (&Spoint_min
);
2604 defsubr (&Spoint_min_marker
);
2605 defsubr (&Spoint_max_marker
);
2607 defsubr (&Sline_beginning_position
);
2608 defsubr (&Sline_end_position
);
2614 defsubr (&Sfollowing_char
);
2615 defsubr (&Sprevious_char
);
2616 defsubr (&Schar_after
);
2618 defsubr (&Sinsert_before_markers
);
2619 defsubr (&Sinsert_and_inherit
);
2620 defsubr (&Sinsert_and_inherit_before_markers
);
2621 defsubr (&Sinsert_char
);
2623 defsubr (&Suser_login_name
);
2624 defsubr (&Suser_real_login_name
);
2625 defsubr (&Suser_uid
);
2626 defsubr (&Suser_real_uid
);
2627 defsubr (&Suser_full_name
);
2628 defsubr (&Semacs_pid
);
2629 defsubr (&Scurrent_time
);
2630 defsubr (&Sformat_time_string
);
2631 defsubr (&Sdecode_time
);
2632 defsubr (&Sencode_time
);
2633 defsubr (&Scurrent_time_string
);
2634 defsubr (&Scurrent_time_zone
);
2635 defsubr (&Sset_time_zone_rule
);
2636 defsubr (&Ssystem_name
);
2637 defsubr (&Smessage
);
2638 defsubr (&Smessage_box
);
2639 defsubr (&Smessage_or_box
);
2642 defsubr (&Sinsert_buffer_substring
);
2643 defsubr (&Scompare_buffer_substrings
);
2644 defsubr (&Ssubst_char_in_region
);
2645 defsubr (&Stranslate_region
);
2646 defsubr (&Sdelete_region
);
2648 defsubr (&Snarrow_to_region
);
2649 defsubr (&Ssave_restriction
);
2650 defsubr (&Stranspose_regions
);