1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985,86,87,89,93,94,95,96,97 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"
40 #define min(a, b) ((a) < (b) ? (a) : (b))
41 #define max(a, b) ((a) > (b) ? (a) : (b))
43 extern char **environ
;
44 extern Lisp_Object
make_time ();
45 extern void insert_from_buffer ();
46 static int tm_diff ();
47 static void update_buffer_properties ();
48 void set_time_zone_rule ();
50 Lisp_Object Vbuffer_access_fontify_functions
;
51 Lisp_Object Qbuffer_access_fontify_functions
;
52 Lisp_Object Vbuffer_access_fontified_property
;
54 Lisp_Object
Fuser_full_name ();
56 /* Some static data, and a function to initialize it for each run */
58 Lisp_Object Vsystem_name
;
59 Lisp_Object Vuser_real_login_name
; /* login name of current user ID */
60 Lisp_Object Vuser_full_name
; /* full name of current user */
61 Lisp_Object Vuser_login_name
; /* user name from LOGNAME or USER */
67 register unsigned char *p
, *q
, *r
;
68 struct passwd
*pw
; /* password entry for the current user */
71 /* Set up system_name even when dumping. */
75 /* Don't bother with this on initial start when just dumping out */
78 #endif /* not CANNOT_DUMP */
80 pw
= (struct passwd
*) getpwuid (getuid ());
82 /* We let the real user name default to "root" because that's quite
83 accurate on MSDOG and because it lets Emacs find the init file.
84 (The DVX libraries override the Djgpp libraries here.) */
85 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "root");
87 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "unknown");
90 /* Get the effective user name, by consulting environment variables,
91 or the effective uid if those are unset. */
92 user_name
= (char *) getenv ("LOGNAME");
95 user_name
= (char *) getenv ("USERNAME"); /* it's USERNAME on NT */
97 user_name
= (char *) getenv ("USER");
98 #endif /* WINDOWSNT */
101 pw
= (struct passwd
*) getpwuid (geteuid ());
102 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
104 Vuser_login_name
= build_string (user_name
);
106 /* If the user name claimed in the environment vars differs from
107 the real uid, use the claimed name to find the full name. */
108 tem
= Fstring_equal (Vuser_login_name
, Vuser_real_login_name
);
109 Vuser_full_name
= Fuser_full_name (NILP (tem
)? make_number (geteuid())
112 p
= (unsigned char *) getenv ("NAME");
114 Vuser_full_name
= build_string (p
);
115 else if (NILP (Vuser_full_name
))
116 Vuser_full_name
= build_string ("unknown");
119 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
120 "Convert arg CHAR to a string containing multi-byte form of that character.")
122 Lisp_Object character
;
125 char workbuf
[4], *str
;
127 CHECK_NUMBER (character
, 0);
129 len
= CHAR_STRING (XFASTINT (character
), workbuf
, str
);
130 return make_string (str
, len
);
133 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
134 "Convert arg STRING to a character, the first character of that string.\n\
135 A multibyte character is handled correctly.")
137 register Lisp_Object string
;
139 register Lisp_Object val
;
140 register struct Lisp_String
*p
;
141 CHECK_STRING (string
, 0);
142 p
= XSTRING (string
);
144 XSETFASTINT (val
, STRING_CHAR (p
->data
, p
->size
));
146 XSETFASTINT (val
, 0);
150 DEFUN ("sref", Fsref
, Ssref
, 2, 2, 0,
151 "Return the character in STRING at INDEX. INDEX starts at 0.\n\
152 A multibyte character is handled correctly.\n\
153 INDEX not pointing at character boundary is an error.")
155 Lisp_Object str
, idx
;
157 register int idxval
, len
;
158 register unsigned char *p
;
159 register Lisp_Object val
;
161 CHECK_STRING (str
, 0);
162 CHECK_NUMBER (idx
, 1);
164 if (idxval
< 0 || idxval
>= (len
= XVECTOR (str
)->size
))
165 args_out_of_range (str
, idx
);
166 p
= XSTRING (str
)->data
+ idxval
;
167 if (!CHAR_HEAD_P (p
))
168 error ("Not character boundary");
170 len
= XSTRING (str
)->size
- idxval
;
171 XSETFASTINT (val
, STRING_CHAR (p
, len
));
180 register Lisp_Object mark
;
181 mark
= Fmake_marker ();
182 Fset_marker (mark
, make_number (val
), Qnil
);
186 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
187 "Return value of point, as an integer.\n\
188 Beginning of buffer is position (point-min)")
192 XSETFASTINT (temp
, PT
);
196 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
197 "Return value of point, as a marker object.")
200 return buildmark (PT
);
204 clip_to_bounds (lower
, num
, upper
)
205 int lower
, num
, upper
;
209 else if (num
> upper
)
215 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
216 "Set point to POSITION, a number or marker.\n\
217 Beginning of buffer is position (point-min), end is (point-max).\n\
218 If the position is in the middle of a multibyte form,\n\
219 the actual point is set at the head of the multibyte form\n\
220 except in the case that `enable-multibyte-characters' is nil.")
222 register Lisp_Object position
;
227 CHECK_NUMBER_COERCE_MARKER (position
, 0);
229 pos
= clip_to_bounds (BEGV
, XINT (position
), ZV
);
230 /* If POS is in a middle of multi-byte form (i.e. *P >= 0xA0), we
231 must decrement POS until it points the head of the multi-byte
233 if (!NILP (current_buffer
->enable_multibyte_characters
)
234 && *(p
= POS_ADDR (pos
)) >= 0xA0
237 /* Since a multi-byte form does not contain the gap, POS should
238 not stride over the gap while it is being decreased. So, we
239 set the limit as below. */
240 unsigned char *p_min
= pos
< GPT
? BEG_ADDR
: GAP_END_ADDR
;
241 unsigned int saved_pos
= pos
;
245 } while (p
> p_min
&& *p
>= 0xA0);
247 /* This was an invalid multi-byte form. */
249 XSETFASTINT (position
, pos
);
256 region_limit (beginningp
)
259 extern Lisp_Object Vmark_even_if_inactive
; /* Defined in callint.c. */
260 register Lisp_Object m
;
261 if (!NILP (Vtransient_mark_mode
) && NILP (Vmark_even_if_inactive
)
262 && NILP (current_buffer
->mark_active
))
263 Fsignal (Qmark_inactive
, Qnil
);
264 m
= Fmarker_position (current_buffer
->mark
);
265 if (NILP (m
)) error ("There is no region now");
266 if ((PT
< XFASTINT (m
)) == beginningp
)
267 return (make_number (PT
));
272 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
273 "Return position of beginning of region, as an integer.")
276 return (region_limit (1));
279 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
280 "Return position of end of region, as an integer.")
283 return (region_limit (0));
286 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
287 "Return this buffer's mark, as a marker object.\n\
288 Watch out! Moving this marker changes the mark position.\n\
289 If you set the marker not to point anywhere, the buffer will have no mark.")
292 return current_buffer
->mark
;
295 DEFUN ("line-beginning-position", Fline_beginning_position
, Sline_beginning_position
,
297 "Return the character position of the first character on the current line.\n\
298 With argument N not nil or 1, move forward N - 1 lines first.\n\
299 If scan reaches end of buffer, return that position.\n\
300 This function does not move point.")
304 register int orig
, end
;
312 Fforward_line (make_number (XINT (n
) - 1));
316 return make_number (end
);
319 DEFUN ("line-end-position", Fline_end_position
, Sline_end_position
,
321 "Return the character position of the last character on the current line.\n\
322 With argument N not nil or 1, move forward N - 1 lines first.\n\
323 If scan reaches end of buffer, return that position.\n\
324 This function does not move point.")
333 return make_number (find_before_next_newline
334 (PT
, 0, XINT (n
) - (XINT (n
) <= 0)));
338 save_excursion_save ()
340 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
343 return Fcons (Fpoint_marker (),
344 Fcons (Fcopy_marker (current_buffer
->mark
, Qnil
),
345 Fcons (visible
? Qt
: Qnil
,
346 current_buffer
->mark_active
)));
350 save_excursion_restore (info
)
353 Lisp_Object tem
, tem1
, omark
, nmark
;
354 struct gcpro gcpro1
, gcpro2
, gcpro3
;
356 tem
= Fmarker_buffer (Fcar (info
));
357 /* If buffer being returned to is now deleted, avoid error */
358 /* Otherwise could get error here while unwinding to top level
360 /* In that case, Fmarker_buffer returns nil now. */
364 omark
= nmark
= Qnil
;
365 GCPRO3 (info
, omark
, nmark
);
370 unchain_marker (tem
);
371 tem
= Fcar (Fcdr (info
));
372 omark
= Fmarker_position (current_buffer
->mark
);
373 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
374 nmark
= Fmarker_position (tem
);
375 unchain_marker (tem
);
376 tem
= Fcdr (Fcdr (info
));
377 #if 0 /* We used to make the current buffer visible in the selected window
378 if that was true previously. That avoids some anomalies.
379 But it creates others, and it wasn't documented, and it is simpler
380 and cleaner never to alter the window/buffer connections. */
383 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
384 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
387 tem1
= current_buffer
->mark_active
;
388 current_buffer
->mark_active
= Fcdr (tem
);
389 if (!NILP (Vrun_hooks
))
391 /* If mark is active now, and either was not active
392 or was at a different place, run the activate hook. */
393 if (! NILP (current_buffer
->mark_active
))
395 if (! EQ (omark
, nmark
))
396 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
398 /* If mark has ceased to be active, run deactivate hook. */
399 else if (! NILP (tem1
))
400 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
406 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
407 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
408 Executes BODY just like `progn'.\n\
409 The values of point, mark and the current buffer are restored\n\
410 even in case of abnormal exit (throw or error).\n\
411 The state of activation of the mark is also restored.")
415 register Lisp_Object val
;
416 int count
= specpdl_ptr
- specpdl
;
418 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
421 return unbind_to (count
, val
);
424 DEFUN ("save-current-buffer", Fsave_current_buffer
, Ssave_current_buffer
, 0, UNEVALLED
, 0,
425 "Save the current buffer; execute BODY; restore the current buffer.\n\
426 Executes BODY just like `progn'.")
430 register Lisp_Object val
;
431 int count
= specpdl_ptr
- specpdl
;
433 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
436 return unbind_to (count
, val
);
439 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 0, 0,
440 "Return the number of characters in the current buffer.")
444 XSETFASTINT (temp
, Z
- BEG
);
448 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
449 "Return the minimum permissible value of point in the current buffer.\n\
450 This is 1, unless narrowing (a buffer restriction) is in effect.")
454 XSETFASTINT (temp
, BEGV
);
458 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
459 "Return a marker to the minimum permissible value of point in this buffer.\n\
460 This is the beginning, unless narrowing (a buffer restriction) is in effect.")
463 return buildmark (BEGV
);
466 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
467 "Return the maximum permissible value of point in the current buffer.\n\
468 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
469 is in effect, in which case it is less.")
473 XSETFASTINT (temp
, ZV
);
477 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
478 "Return a marker to the maximum permissible value of point in this buffer.\n\
479 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
480 is in effect, in which case it is less.")
483 return buildmark (ZV
);
486 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
487 "Return the character following point, as a number.\n\
488 At the end of the buffer or accessible region, return 0.\n\
489 If `enable-multibyte-characters' is nil or point is not\n\
490 at character boundary, multibyte form is ignored,\n\
491 and only one byte following point is returned as a character.")
496 XSETFASTINT (temp
, 0);
498 XSETFASTINT (temp
, FETCH_CHAR (PT
));
502 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
503 "Return the character preceding point, as a number.\n\
504 At the beginning of the buffer or accessible region, return 0.\n\
505 If `enable-multibyte-characters' is nil or point is not\n\
506 at character boundary, multi-byte form is ignored,\n\
507 and only one byte preceding point is returned as a character.")
512 XSETFASTINT (temp
, 0);
513 else if (!NILP (current_buffer
->enable_multibyte_characters
))
517 XSETFASTINT (temp
, FETCH_CHAR (pos
));
520 XSETFASTINT (temp
, FETCH_BYTE (point
- 1));
524 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
525 "Return T if point is at the beginning of the buffer.\n\
526 If the buffer is narrowed, this means the beginning of the narrowed part.")
534 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
535 "Return T if point is at the end of the buffer.\n\
536 If the buffer is narrowed, this means the end of the narrowed part.")
544 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
545 "Return T if point is at the beginning of a line.")
548 if (PT
== BEGV
|| FETCH_BYTE (PT
- 1) == '\n')
553 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
554 "Return T if point is at the end of a line.\n\
555 `End of a line' includes point being at the end of the buffer.")
558 if (PT
== ZV
|| FETCH_BYTE (PT
) == '\n')
563 DEFUN ("char-after", Fchar_after
, Schar_after
, 1, 1, 0,
564 "Return character in current buffer at position POS.\n\
565 POS is an integer or a buffer pointer.\n\
566 If POS is out of range, the value is nil.\n\
567 If `enable-multibyte-characters' is nil or POS is not at character boundary,\n\
568 multi-byte form is ignored, and only one byte at POS\n\
569 is returned as a character.")
573 register Lisp_Object val
;
576 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
579 if (n
< BEGV
|| n
>= ZV
) return Qnil
;
581 XSETFASTINT (val
, FETCH_CHAR (n
));
585 DEFUN ("char-before", Fchar_before
, Schar_before
, 1, 1, 0,
586 "Return character in current buffer preceding position POS.\n\
587 POS is an integer or a buffer pointer.\n\
588 If POS is out of range, the value is nil.\n\
589 If `enable-multibyte-characters' is nil or POS is not at character boundary,\n\
590 multi-byte form is ignored, and only one byte preceding POS\n\
591 is returned as a character.")
595 register Lisp_Object val
;
598 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
601 if (n
<= BEGV
|| n
> ZV
) return Qnil
;
603 if (!NILP (current_buffer
->enable_multibyte_characters
))
606 XSETFASTINT (val
, FETCH_CHAR (pos
));
611 XSETFASTINT (val
, FETCH_BYTE (pos
));
616 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 1, 0,
617 "Return the name under which the user logged in, as a string.\n\
618 This is based on the effective uid, not the real uid.\n\
619 Also, if the environment variable LOGNAME or USER is set,\n\
620 that determines the value of this function.\n\n\
621 If optional argument UID is an integer, return the login name of the user\n\
622 with that uid, or nil if there is no such user.")
628 /* Set up the user name info if we didn't do it before.
629 (That can happen if Emacs is dumpable
630 but you decide to run `temacs -l loadup' and not dump. */
631 if (INTEGERP (Vuser_login_name
))
635 return Vuser_login_name
;
637 CHECK_NUMBER (uid
, 0);
638 pw
= (struct passwd
*) getpwuid (XINT (uid
));
639 return (pw
? build_string (pw
->pw_name
) : Qnil
);
642 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
644 "Return the name of the user's real uid, as a string.\n\
645 This ignores the environment variables LOGNAME and USER, so it differs from\n\
646 `user-login-name' when running under `su'.")
649 /* Set up the user name info if we didn't do it before.
650 (That can happen if Emacs is dumpable
651 but you decide to run `temacs -l loadup' and not dump. */
652 if (INTEGERP (Vuser_login_name
))
654 return Vuser_real_login_name
;
657 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
658 "Return the effective uid of Emacs, as an integer.")
661 return make_number (geteuid ());
664 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
665 "Return the real uid of Emacs, as an integer.")
668 return make_number (getuid ());
671 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 1, 0,
672 "Return the full name of the user logged in, as a string.\n\
673 If optional argument UID is an integer, return the full name of the user\n\
674 with that uid, or \"unknown\" if there is no such user.\n\
675 If UID is a string, return the full name of the user with that login\n\
676 name, or \"unknown\" if no such user could be found.")
681 register char *p
, *q
;
682 extern char *index ();
686 return Vuser_full_name
;
687 else if (NUMBERP (uid
))
688 pw
= (struct passwd
*) getpwuid (XINT (uid
));
689 else if (STRINGP (uid
))
690 pw
= (struct passwd
*) getpwnam (XSTRING (uid
)->data
);
692 error ("Invalid UID specification");
697 p
= (unsigned char *) USER_FULL_NAME
;
698 /* Chop off everything after the first comma. */
699 q
= (unsigned char *) index (p
, ',');
700 full
= make_string (p
, q
? q
- p
: strlen (p
));
702 #ifdef AMPERSAND_FULL_NAME
703 p
= XSTRING (full
)->data
;
704 q
= (unsigned char *) index (p
, '&');
705 /* Substitute the login name for the &, upcasing the first character. */
711 login
= Fuser_login_name (make_number (pw
->pw_uid
));
712 r
= (unsigned char *) alloca (strlen (p
) + XSTRING (login
)->size
+ 1);
715 strcat (r
, XSTRING (login
)->data
);
716 r
[q
- p
] = UPCASE (r
[q
- p
]);
718 full
= build_string (r
);
720 #endif /* AMPERSAND_FULL_NAME */
725 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
726 "Return the name of the machine you are running on, as a string.")
732 /* For the benefit of callers who don't want to include lisp.h */
736 return (char *) XSTRING (Vsystem_name
)->data
;
739 DEFUN ("emacs-pid", Femacs_pid
, Semacs_pid
, 0, 0, 0,
740 "Return the process ID of Emacs, as an integer.")
743 return make_number (getpid ());
746 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
747 "Return the current time, as the number of seconds since 1970-01-01 00:00:00.\n\
748 The time is returned as a list of three integers. The first has the\n\
749 most significant 16 bits of the seconds, while the second has the\n\
750 least significant 16 bits. The third integer gives the microsecond\n\
753 The microsecond count is zero on systems that do not provide\n\
754 resolution finer than a second.")
758 Lisp_Object result
[3];
761 XSETINT (result
[0], (EMACS_SECS (t
) >> 16) & 0xffff);
762 XSETINT (result
[1], (EMACS_SECS (t
) >> 0) & 0xffff);
763 XSETINT (result
[2], EMACS_USECS (t
));
765 return Flist (3, result
);
770 lisp_time_argument (specified_time
, result
)
771 Lisp_Object specified_time
;
774 if (NILP (specified_time
))
775 return time (result
) != -1;
778 Lisp_Object high
, low
;
779 high
= Fcar (specified_time
);
780 CHECK_NUMBER (high
, 0);
781 low
= Fcdr (specified_time
);
784 CHECK_NUMBER (low
, 0);
785 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
786 return *result
>> 16 == XINT (high
);
790 DEFUN ("format-time-string", Fformat_time_string
, Sformat_time_string
, 1, 3, 0,
791 "Use FORMAT-STRING to format the time TIME, or now if omitted.\n\
792 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as returned by\n\
793 `current-time' or `file-attributes'.\n\
794 The third, optional, argument UNIVERSAL, if non-nil, means describe TIME\n\
795 as Universal Time; nil means describe TIME in the local time zone.\n\
796 The value is a copy of FORMAT-STRING, but with certain constructs replaced\n\
797 by text that describes the specified date and time in TIME:\n\
799 %Y is the year, %y within the century, %C the century.\n\
800 %G is the year corresponding to the ISO week, %g within the century.\n\
801 %m is the numeric month, %b and %h the abbreviated name, %B the full name.\n\
802 %d is the day of the month, zero-padded, %e is blank-padded.\n\
803 %u is the numeric day of week from 1 (Monday) to 7, %w from 0 (Sunday) to 6.\n\
804 %a is the abbreviated name of the day of week, %A the full name.\n\
805 %U is the week number starting on Sunday, %W starting on Monday,\n\
806 %V according to ISO 8601.\n\
807 %j is the day of the year.\n\
809 %H is the hour on a 24-hour clock, %I is on a 12-hour clock, %k is like %H\n\
810 only blank-padded, %l is like %I blank-padded.\n\
814 %Z is the time zone name, %z is the numeric form.\n\
815 %s is the number of seconds since 1970-01-01 00:00:00 +0000.\n\
817 %c is the locale's date and time format.\n\
818 %x is the locale's \"preferred\" date format.\n\
819 %D is like \"%m/%d/%y\".\n\
821 %R is like \"%H:%M\", %T is like \"%H:%M:%S\", %r is like \"%I:%M:%S %p\".\n\
822 %X is the locale's \"preferred\" time format.\n\
824 Finally, %n is like \n, %t is like \t, %% is a literal %.\n\
826 Certain flags and modifiers are available with some format controls.
827 The flags are `_' and `-'. For certain characters X, %_X is like %X,\n\
828 but padded with blanks; %-X is like %X, but without padding.\n\
829 %NX (where N stands for an integer) is like %X,\n\
830 but takes up at least N (a number) positions.\n\
831 The modifiers are `E' and `O'. For certain characters X,\n\
832 %EX is a locale's alternative version of %X;\n\
833 %OX is like %X, but uses the locale's number symbols.\n\
835 For example, to produce full ISO 8601 format, use \"%Y-%m-%dT%T%z\".")
836 (format_string
, time
, universal
)
837 Lisp_Object format_string
, time
, universal
;
842 CHECK_STRING (format_string
, 1);
844 if (! lisp_time_argument (time
, &value
))
845 error ("Invalid time specification");
847 /* This is probably enough. */
848 size
= XSTRING (format_string
)->size
* 6 + 50;
852 char *buf
= (char *) alloca (size
+ 1);
855 result
= emacs_strftime (buf
, size
, XSTRING (format_string
)->data
,
856 (NILP (universal
) ? localtime (&value
)
858 if (result
> 0 && result
< size
)
859 return build_string (buf
);
861 error ("Invalid time format specification");
863 /* If buffer was too small, make it bigger and try again. */
864 result
= emacs_strftime (buf
, 0, XSTRING (format_string
)->data
,
865 (NILP (universal
) ? localtime (&value
)
871 DEFUN ("decode-time", Fdecode_time
, Sdecode_time
, 0, 1, 0,
872 "Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE).\n\
873 The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED)\n\
874 or (HIGH . LOW), as from `current-time' and `file-attributes', or `nil'\n\
875 to use the current time. The list has the following nine members:\n\
876 SEC is an integer between 0 and 60; SEC is 60 for a leap second, which\n\
877 only some operating systems support. MINUTE is an integer between 0 and 59.\n\
878 HOUR is an integer between 0 and 23. DAY is an integer between 1 and 31.\n\
879 MONTH is an integer between 1 and 12. YEAR is an integer indicating the\n\
880 four-digit year. DOW is the day of week, an integer between 0 and 6, where\n\
881 0 is Sunday. DST is t if daylight savings time is effect, otherwise nil.\n\
882 ZONE is an integer indicating the number of seconds east of Greenwich.\n\
883 \(Note that Common Lisp has different meanings for DOW and ZONE.)")
885 Lisp_Object specified_time
;
889 struct tm
*decoded_time
;
890 Lisp_Object list_args
[9];
892 if (! lisp_time_argument (specified_time
, &time_spec
))
893 error ("Invalid time specification");
895 decoded_time
= localtime (&time_spec
);
896 XSETFASTINT (list_args
[0], decoded_time
->tm_sec
);
897 XSETFASTINT (list_args
[1], decoded_time
->tm_min
);
898 XSETFASTINT (list_args
[2], decoded_time
->tm_hour
);
899 XSETFASTINT (list_args
[3], decoded_time
->tm_mday
);
900 XSETFASTINT (list_args
[4], decoded_time
->tm_mon
+ 1);
901 XSETINT (list_args
[5], decoded_time
->tm_year
+ 1900);
902 XSETFASTINT (list_args
[6], decoded_time
->tm_wday
);
903 list_args
[7] = (decoded_time
->tm_isdst
)? Qt
: Qnil
;
905 /* Make a copy, in case gmtime modifies the struct. */
906 save_tm
= *decoded_time
;
907 decoded_time
= gmtime (&time_spec
);
908 if (decoded_time
== 0)
911 XSETINT (list_args
[8], tm_diff (&save_tm
, decoded_time
));
912 return Flist (9, list_args
);
915 DEFUN ("encode-time", Fencode_time
, Sencode_time
, 6, MANY
, 0,
916 "Convert SECOND, MINUTE, HOUR, DAY, MONTH, YEAR and ZONE to internal time.\n\
917 This is the reverse operation of `decode-time', which see.\n\
918 ZONE defaults to the current time zone rule. This can\n\
919 be a string or t (as from `set-time-zone-rule'), or it can be a list\n\
920 \(as from `current-time-zone') or an integer (as from `decode-time')\n\
921 applied without consideration for daylight savings time.\n\
923 You can pass more than 7 arguments; then the first six arguments\n\
924 are used as SECOND through YEAR, and the *last* argument is used as ZONE.\n\
925 The intervening arguments are ignored.\n\
926 This feature lets (apply 'encode-time (decode-time ...)) work.\n\
928 Out-of-range values for SEC, MINUTE, HOUR, DAY, or MONTH are allowed;\n\
929 for example, a DAY of 0 means the day preceding the given month.\n\
930 Year numbers less than 100 are treated just like other year numbers.\n\
931 If you want them to stand for years in this century, you must do that yourself.")
934 register Lisp_Object
*args
;
938 Lisp_Object zone
= (nargs
> 6 ? args
[nargs
- 1] : Qnil
);
940 CHECK_NUMBER (args
[0], 0); /* second */
941 CHECK_NUMBER (args
[1], 1); /* minute */
942 CHECK_NUMBER (args
[2], 2); /* hour */
943 CHECK_NUMBER (args
[3], 3); /* day */
944 CHECK_NUMBER (args
[4], 4); /* month */
945 CHECK_NUMBER (args
[5], 5); /* year */
947 tm
.tm_sec
= XINT (args
[0]);
948 tm
.tm_min
= XINT (args
[1]);
949 tm
.tm_hour
= XINT (args
[2]);
950 tm
.tm_mday
= XINT (args
[3]);
951 tm
.tm_mon
= XINT (args
[4]) - 1;
952 tm
.tm_year
= XINT (args
[5]) - 1900;
963 char **oldenv
= environ
, **newenv
;
967 else if (STRINGP (zone
))
968 tzstring
= (char *) XSTRING (zone
)->data
;
969 else if (INTEGERP (zone
))
971 int abszone
= abs (XINT (zone
));
972 sprintf (tzbuf
, "XXX%s%d:%02d:%02d", "-" + (XINT (zone
) < 0),
973 abszone
/ (60*60), (abszone
/60) % 60, abszone
% 60);
977 error ("Invalid time zone specification");
979 /* Set TZ before calling mktime; merely adjusting mktime's returned
980 value doesn't suffice, since that would mishandle leap seconds. */
981 set_time_zone_rule (tzstring
);
985 /* Restore TZ to previous value. */
989 #ifdef LOCALTIME_CACHE
994 if (time
== (time_t) -1)
995 error ("Specified time is not representable");
997 return make_time (time
);
1000 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
1001 "Return the current time, as a human-readable string.\n\
1002 Programs can use this function to decode a time,\n\
1003 since the number of columns in each field is fixed.\n\
1004 The format is `Sun Sep 16 01:03:52 1973'.\n\
1005 If an argument is given, it specifies a time to format\n\
1006 instead of the current time. The argument should have the form:\n\
1009 (HIGH LOW . IGNORED).\n\
1010 Thus, you can use times obtained from `current-time'\n\
1011 and from `file-attributes'.")
1013 Lisp_Object specified_time
;
1019 if (! lisp_time_argument (specified_time
, &value
))
1021 tem
= (char *) ctime (&value
);
1023 strncpy (buf
, tem
, 24);
1026 return build_string (buf
);
1029 #define TM_YEAR_BASE 1900
1031 /* Yield A - B, measured in seconds.
1032 This function is copied from the GNU C Library. */
1037 /* Compute intervening leap days correctly even if year is negative.
1038 Take care to avoid int overflow in leap day calculations,
1039 but it's OK to assume that A and B are close to each other. */
1040 int a4
= (a
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (a
->tm_year
& 3);
1041 int b4
= (b
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (b
->tm_year
& 3);
1042 int a100
= a4
/ 25 - (a4
% 25 < 0);
1043 int b100
= b4
/ 25 - (b4
% 25 < 0);
1044 int a400
= a100
>> 2;
1045 int b400
= b100
>> 2;
1046 int intervening_leap_days
= (a4
- b4
) - (a100
- b100
) + (a400
- b400
);
1047 int years
= a
->tm_year
- b
->tm_year
;
1048 int days
= (365 * years
+ intervening_leap_days
1049 + (a
->tm_yday
- b
->tm_yday
));
1050 return (60 * (60 * (24 * days
+ (a
->tm_hour
- b
->tm_hour
))
1051 + (a
->tm_min
- b
->tm_min
))
1052 + (a
->tm_sec
- b
->tm_sec
));
1055 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
1056 "Return the offset and name for the local time zone.\n\
1057 This returns a list of the form (OFFSET NAME).\n\
1058 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
1059 A negative value means west of Greenwich.\n\
1060 NAME is a string giving the name of the time zone.\n\
1061 If an argument is given, it specifies when the time zone offset is determined\n\
1062 instead of using the current time. The argument should have the form:\n\
1065 (HIGH LOW . IGNORED).\n\
1066 Thus, you can use times obtained from `current-time'\n\
1067 and from `file-attributes'.\n\
1069 Some operating systems cannot provide all this information to Emacs;\n\
1070 in this case, `current-time-zone' returns a list containing nil for\n\
1071 the data it can't find.")
1073 Lisp_Object specified_time
;
1078 if (lisp_time_argument (specified_time
, &value
)
1079 && (t
= gmtime (&value
)) != 0)
1085 gmt
= *t
; /* Make a copy, in case localtime modifies *t. */
1086 t
= localtime (&value
);
1087 offset
= tm_diff (t
, &gmt
);
1091 s
= (char *)t
->tm_zone
;
1092 #else /* not HAVE_TM_ZONE */
1094 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
1095 s
= tzname
[t
->tm_isdst
];
1097 #endif /* not HAVE_TM_ZONE */
1100 /* No local time zone name is available; use "+-NNNN" instead. */
1101 int am
= (offset
< 0 ? -offset
: offset
) / 60;
1102 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
1105 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
1108 return Fmake_list (2, Qnil
);
1111 /* This holds the value of `environ' produced by the previous
1112 call to Fset_time_zone_rule, or 0 if Fset_time_zone_rule
1113 has never been called. */
1114 static char **environbuf
;
1116 DEFUN ("set-time-zone-rule", Fset_time_zone_rule
, Sset_time_zone_rule
, 1, 1, 0,
1117 "Set the local time zone using TZ, a string specifying a time zone rule.\n\
1118 If TZ is nil, use implementation-defined default time zone information.\n\
1119 If TZ is t, use Universal Time.")
1131 CHECK_STRING (tz
, 0);
1132 tzstring
= (char *) XSTRING (tz
)->data
;
1135 set_time_zone_rule (tzstring
);
1138 environbuf
= environ
;
1143 #ifdef LOCALTIME_CACHE
1145 /* These two values are known to load tz files in buggy implementations,
1146 i.e. Solaris 1 executables running under either Solaris 1 or Solaris 2.
1147 Their values shouldn't matter in non-buggy implementations.
1148 We don't use string literals for these strings,
1149 since if a string in the environment is in readonly
1150 storage, it runs afoul of bugs in SVR4 and Solaris 2.3.
1151 See Sun bugs 1113095 and 1114114, ``Timezone routines
1152 improperly modify environment''. */
1154 static char set_time_zone_rule_tz1
[] = "TZ=GMT+0";
1155 static char set_time_zone_rule_tz2
[] = "TZ=GMT+1";
1159 /* Set the local time zone rule to TZSTRING.
1160 This allocates memory into `environ', which it is the caller's
1161 responsibility to free. */
1163 set_time_zone_rule (tzstring
)
1167 char **from
, **to
, **newenv
;
1169 /* Make the ENVIRON vector longer with room for TZSTRING. */
1170 for (from
= environ
; *from
; from
++)
1172 envptrs
= from
- environ
+ 2;
1173 newenv
= to
= (char **) xmalloc (envptrs
* sizeof (char *)
1174 + (tzstring
? strlen (tzstring
) + 4 : 0));
1176 /* Add TZSTRING to the end of environ, as a value for TZ. */
1179 char *t
= (char *) (to
+ envptrs
);
1181 strcat (t
, tzstring
);
1185 /* Copy the old environ vector elements into NEWENV,
1186 but don't copy the TZ variable.
1187 So we have only one definition of TZ, which came from TZSTRING. */
1188 for (from
= environ
; *from
; from
++)
1189 if (strncmp (*from
, "TZ=", 3) != 0)
1195 /* If we do have a TZSTRING, NEWENV points to the vector slot where
1196 the TZ variable is stored. If we do not have a TZSTRING,
1197 TO points to the vector slot which has the terminating null. */
1199 #ifdef LOCALTIME_CACHE
1201 /* In SunOS 4.1.3_U1 and 4.1.4, if TZ has a value like
1202 "US/Pacific" that loads a tz file, then changes to a value like
1203 "XXX0" that does not load a tz file, and then changes back to
1204 its original value, the last change is (incorrectly) ignored.
1205 Also, if TZ changes twice in succession to values that do
1206 not load a tz file, tzset can dump core (see Sun bug#1225179).
1207 The following code works around these bugs. */
1211 /* Temporarily set TZ to a value that loads a tz file
1212 and that differs from tzstring. */
1214 *newenv
= (strcmp (tzstring
, set_time_zone_rule_tz1
+ 3) == 0
1215 ? set_time_zone_rule_tz2
: set_time_zone_rule_tz1
);
1221 /* The implied tzstring is unknown, so temporarily set TZ to
1222 two different values that each load a tz file. */
1223 *to
= set_time_zone_rule_tz1
;
1226 *to
= set_time_zone_rule_tz2
;
1231 /* Now TZ has the desired value, and tzset can be invoked safely. */
1238 /* Insert NARGS Lisp objects in the array ARGS by calling INSERT_FUNC
1239 (if a type of object is Lisp_Int) or INSERT_FROM_STRING_FUNC (if a
1240 type of object is Lisp_String). INHERIT is passed to
1241 INSERT_FROM_STRING_FUNC as the last argument. */
1243 general_insert_function (insert_func
, insert_from_string_func
,
1244 inherit
, nargs
, args
)
1245 int (*insert_func
)(), (*insert_from_string_func
)();
1247 register Lisp_Object
*args
;
1249 register int argnum
;
1250 register Lisp_Object val
;
1252 for (argnum
= 0; argnum
< nargs
; argnum
++)
1258 char workbuf
[4], *str
;
1261 if (!NILP (current_buffer
->enable_multibyte_characters
))
1262 len
= CHAR_STRING (XFASTINT (val
), workbuf
, str
);
1264 workbuf
[0] = XINT (val
), str
= workbuf
, len
= 1;
1265 (*insert_func
) (str
, len
);
1267 else if (STRINGP (val
))
1269 (*insert_from_string_func
) (val
, 0, XSTRING (val
)->size
, inherit
);
1273 val
= wrong_type_argument (Qchar_or_string_p
, val
);
1287 /* Callers passing one argument to Finsert need not gcpro the
1288 argument "array", since the only element of the array will
1289 not be used after calling insert or insert_from_string, so
1290 we don't care if it gets trashed. */
1292 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
1293 "Insert the arguments, either strings or characters, at point.\n\
1294 Point and before-insertion-markers move forward so that it ends up\n\
1295 after the inserted text.\n\
1296 Any other markers at the point of insertion remain before the text.")
1299 register Lisp_Object
*args
;
1301 general_insert_function (insert
, insert_from_string
, 0, nargs
, args
);
1305 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
1307 "Insert the arguments at point, inheriting properties from adjoining text.\n\
1308 Point and before-insertion-markers move forward so that it ends up\n\
1309 after the inserted text.\n\
1310 Any other markers at the point of insertion remain before the text.")
1313 register Lisp_Object
*args
;
1315 general_insert_function (insert_and_inherit
, insert_from_string
, 1,
1320 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
1321 "Insert strings or characters at point, relocating markers after the text.\n\
1322 Point and before-insertion-markers move forward so that it ends up\n\
1323 after the inserted text.\n\
1324 Any other markers at the point of insertion also end up after the text.")
1327 register Lisp_Object
*args
;
1329 general_insert_function (insert_before_markers
,
1330 insert_from_string_before_markers
, 0,
1335 DEFUN ("insert-before-markers-and-inherit", Finsert_and_inherit_before_markers
,
1336 Sinsert_and_inherit_before_markers
, 0, MANY
, 0,
1337 "Insert text at point, relocating markers and inheriting properties.\n\
1338 Point moves forward so that it ends up after the inserted text.\n\
1339 Any other markers at the point of insertion also end up after the text.")
1342 register Lisp_Object
*args
;
1344 general_insert_function (insert_before_markers_and_inherit
,
1345 insert_from_string_before_markers
, 1,
1350 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 3, 0,
1351 "Insert COUNT (second arg) copies of CHARACTER (first arg).\n\
1352 Point and before-insertion-markers are affected as in the function `insert'.\n\
1353 Both arguments are required.\n\
1354 The optional third arg INHERIT, if non-nil, says to inherit text properties\n\
1355 from adjoining text, if those properties are sticky.")
1356 (character
, count
, inherit
)
1357 Lisp_Object character
, count
, inherit
;
1359 register unsigned char *string
;
1360 register int strlen
;
1363 unsigned char workbuf
[4], *str
;
1365 CHECK_NUMBER (character
, 0);
1366 CHECK_NUMBER (count
, 1);
1368 if (!NILP (current_buffer
->enable_multibyte_characters
))
1369 len
= CHAR_STRING (XFASTINT (character
), workbuf
, str
);
1371 workbuf
[0] = XFASTINT (character
), str
= workbuf
, len
= 1;
1372 n
= XINT (count
) * len
;
1375 strlen
= min (n
, 256 * len
);
1376 string
= (unsigned char *) alloca (strlen
);
1377 for (i
= 0; i
< strlen
; i
++)
1378 string
[i
] = str
[i
% len
];
1381 if (!NILP (inherit
))
1382 insert_and_inherit (string
, strlen
);
1384 insert (string
, strlen
);
1389 if (!NILP (inherit
))
1390 insert_and_inherit (string
, n
);
1398 /* Making strings from buffer contents. */
1400 /* Return a Lisp_String containing the text of the current buffer from
1401 START to END. If text properties are in use and the current buffer
1402 has properties in the range specified, the resulting string will also
1403 have them, if PROPS is nonzero.
1405 We don't want to use plain old make_string here, because it calls
1406 make_uninit_string, which can cause the buffer arena to be
1407 compacted. make_string has no way of knowing that the data has
1408 been moved, and thus copies the wrong data into the string. This
1409 doesn't effect most of the other users of make_string, so it should
1410 be left as is. But we should use this function when conjuring
1411 buffer substrings. */
1414 make_buffer_string (start
, end
, props
)
1418 Lisp_Object result
, tem
, tem1
;
1420 if (start
< GPT
&& GPT
< end
)
1423 result
= make_uninit_string (end
- start
);
1424 bcopy (POS_ADDR (start
), XSTRING (result
)->data
, end
- start
);
1426 /* If desired, update and copy the text properties. */
1427 #ifdef USE_TEXT_PROPERTIES
1430 update_buffer_properties (start
, end
);
1432 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
1433 tem1
= Ftext_properties_at (make_number (start
), Qnil
);
1435 if (XINT (tem
) != end
|| !NILP (tem1
))
1436 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
1443 /* Call Vbuffer_access_fontify_functions for the range START ... END
1444 in the current buffer, if necessary. */
1447 update_buffer_properties (start
, end
)
1450 #ifdef USE_TEXT_PROPERTIES
1451 /* If this buffer has some access functions,
1452 call them, specifying the range of the buffer being accessed. */
1453 if (!NILP (Vbuffer_access_fontify_functions
))
1455 Lisp_Object args
[3];
1458 args
[0] = Qbuffer_access_fontify_functions
;
1459 XSETINT (args
[1], start
);
1460 XSETINT (args
[2], end
);
1462 /* But don't call them if we can tell that the work
1463 has already been done. */
1464 if (!NILP (Vbuffer_access_fontified_property
))
1466 tem
= Ftext_property_any (args
[1], args
[2],
1467 Vbuffer_access_fontified_property
,
1470 Frun_hook_with_args (3, args
);
1473 Frun_hook_with_args (3, args
);
1478 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
1479 "Return the contents of part of the current buffer as a string.\n\
1480 The two arguments START and END are character positions;\n\
1481 they can be in either order.")
1483 Lisp_Object start
, end
;
1487 validate_region (&start
, &end
);
1491 return make_buffer_string (b
, e
, 1);
1494 DEFUN ("buffer-substring-no-properties", Fbuffer_substring_no_properties
,
1495 Sbuffer_substring_no_properties
, 2, 2, 0,
1496 "Return the characters of part of the buffer, without the text properties.\n\
1497 The two arguments START and END are character positions;\n\
1498 they can be in either order.")
1500 Lisp_Object start
, end
;
1504 validate_region (&start
, &end
);
1508 return make_buffer_string (b
, e
, 0);
1511 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
1512 "Return the contents of the current buffer as a string.\n\
1513 If narrowing is in effect, this function returns only the visible part\n\
1517 return make_buffer_string (BEGV
, ZV
, 1);
1520 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
1522 "Insert before point a substring of the contents of buffer BUFFER.\n\
1523 BUFFER may be a buffer or a buffer name.\n\
1524 Arguments START and END are character numbers specifying the substring.\n\
1525 They default to the beginning and the end of BUFFER.")
1527 Lisp_Object buf
, start
, end
;
1529 register int b
, e
, temp
;
1530 register struct buffer
*bp
, *obuf
;
1533 buffer
= Fget_buffer (buf
);
1536 bp
= XBUFFER (buffer
);
1537 if (NILP (bp
->name
))
1538 error ("Selecting deleted buffer");
1544 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1551 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1556 temp
= b
, b
= e
, e
= temp
;
1558 if (!(BUF_BEGV (bp
) <= b
&& e
<= BUF_ZV (bp
)))
1559 args_out_of_range (start
, end
);
1561 obuf
= current_buffer
;
1562 set_buffer_internal_1 (bp
);
1563 update_buffer_properties (b
, e
);
1564 set_buffer_internal_1 (obuf
);
1566 insert_from_buffer (bp
, b
, e
- b
, 0);
1570 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
1572 "Compare two substrings of two buffers; return result as number.\n\
1573 the value is -N if first string is less after N-1 chars,\n\
1574 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
1575 Each substring is represented as three arguments: BUFFER, START and END.\n\
1576 That makes six args in all, three for each substring.\n\n\
1577 The value of `case-fold-search' in the current buffer\n\
1578 determines whether case is significant or ignored.")
1579 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
1580 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
1582 register int begp1
, endp1
, begp2
, endp2
, temp
, len1
, len2
, length
, i
;
1583 register struct buffer
*bp1
, *bp2
;
1584 register Lisp_Object
*trt
1585 = (!NILP (current_buffer
->case_fold_search
)
1586 ? XCHAR_TABLE (current_buffer
->case_canon_table
)->contents
: 0);
1588 /* Find the first buffer and its substring. */
1591 bp1
= current_buffer
;
1595 buf1
= Fget_buffer (buffer1
);
1598 bp1
= XBUFFER (buf1
);
1599 if (NILP (bp1
->name
))
1600 error ("Selecting deleted buffer");
1604 begp1
= BUF_BEGV (bp1
);
1607 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
1608 begp1
= XINT (start1
);
1611 endp1
= BUF_ZV (bp1
);
1614 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
1615 endp1
= XINT (end1
);
1619 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
1621 if (!(BUF_BEGV (bp1
) <= begp1
1623 && endp1
<= BUF_ZV (bp1
)))
1624 args_out_of_range (start1
, end1
);
1626 /* Likewise for second substring. */
1629 bp2
= current_buffer
;
1633 buf2
= Fget_buffer (buffer2
);
1636 bp2
= XBUFFER (buf2
);
1637 if (NILP (bp2
->name
))
1638 error ("Selecting deleted buffer");
1642 begp2
= BUF_BEGV (bp2
);
1645 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
1646 begp2
= XINT (start2
);
1649 endp2
= BUF_ZV (bp2
);
1652 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
1653 endp2
= XINT (end2
);
1657 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
1659 if (!(BUF_BEGV (bp2
) <= begp2
1661 && endp2
<= BUF_ZV (bp2
)))
1662 args_out_of_range (start2
, end2
);
1664 len1
= endp1
- begp1
;
1665 len2
= endp2
- begp2
;
1670 for (i
= 0; i
< length
; i
++)
1672 int c1
= *BUF_CHAR_ADDRESS (bp1
, begp1
+ i
);
1673 int c2
= *BUF_CHAR_ADDRESS (bp2
, begp2
+ i
);
1680 return make_number (- 1 - i
);
1682 return make_number (i
+ 1);
1685 /* The strings match as far as they go.
1686 If one is shorter, that one is less. */
1688 return make_number (length
+ 1);
1689 else if (length
< len2
)
1690 return make_number (- length
- 1);
1692 /* Same length too => they are equal. */
1693 return make_number (0);
1697 subst_char_in_region_unwind (arg
)
1700 return current_buffer
->undo_list
= arg
;
1704 subst_char_in_region_unwind_1 (arg
)
1707 return current_buffer
->filename
= arg
;
1710 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
1711 Ssubst_char_in_region
, 4, 5, 0,
1712 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
1713 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
1714 and don't mark the buffer as really changed.\n\
1715 Both characters must have the same length of multi-byte form.")
1716 (start
, end
, fromchar
, tochar
, noundo
)
1717 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
1719 register int pos
, stop
, i
, len
;
1721 unsigned char fromwork
[4], *fromstr
, towork
[4], *tostr
, *p
;
1722 int count
= specpdl_ptr
- specpdl
;
1724 validate_region (&start
, &end
);
1725 CHECK_NUMBER (fromchar
, 2);
1726 CHECK_NUMBER (tochar
, 3);
1728 if (! NILP (current_buffer
->enable_multibyte_characters
))
1730 len
= CHAR_STRING (XFASTINT (fromchar
), fromwork
, fromstr
);
1731 if (CHAR_STRING (XFASTINT (tochar
), towork
, tostr
) != len
)
1732 error ("Characters in subst-char-in-region have different byte-lengths");
1737 fromwork
[0] = XFASTINT (fromchar
), fromstr
= fromwork
;
1738 towork
[0] = XFASTINT (tochar
), tostr
= towork
;
1744 /* If we don't want undo, turn off putting stuff on the list.
1745 That's faster than getting rid of things,
1746 and it prevents even the entry for a first change.
1747 Also inhibit locking the file. */
1750 record_unwind_protect (subst_char_in_region_unwind
,
1751 current_buffer
->undo_list
);
1752 current_buffer
->undo_list
= Qt
;
1753 /* Don't do file-locking. */
1754 record_unwind_protect (subst_char_in_region_unwind_1
,
1755 current_buffer
->filename
);
1756 current_buffer
->filename
= Qnil
;
1760 stop
= min(stop
, GPT
);
1766 if (pos
>= XINT (end
)) break;
1770 if (p
[0] == fromstr
[0]
1772 || (p
[1] == fromstr
[1]
1773 && (len
== 2 || (p
[2] == fromstr
[2]
1774 && (len
== 3 || p
[3] == fromstr
[3]))))))
1778 modify_region (current_buffer
, XINT (start
), XINT (end
));
1780 if (! NILP (noundo
))
1782 if (MODIFF
- 1 == SAVE_MODIFF
)
1784 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
1785 current_buffer
->auto_save_modified
++;
1792 record_change (pos
, len
);
1793 for (i
= 0; i
< len
; i
++) *p
++ = tostr
[i
];
1801 signal_after_change (XINT (start
),
1802 stop
- XINT (start
), stop
- XINT (start
));
1804 unbind_to (count
, Qnil
);
1808 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
1809 "From START to END, translate characters according to TABLE.\n\
1810 TABLE is a string; the Nth character in it is the mapping\n\
1811 for the character with code N. Returns the number of characters changed.")
1815 register Lisp_Object table
;
1817 register int pos
, stop
; /* Limits of the region. */
1818 register unsigned char *tt
; /* Trans table. */
1819 register int oc
; /* Old character. */
1820 register int nc
; /* New character. */
1821 int cnt
; /* Number of changes made. */
1822 Lisp_Object z
; /* Return. */
1823 int size
; /* Size of translate table. */
1825 validate_region (&start
, &end
);
1826 CHECK_STRING (table
, 2);
1828 size
= XSTRING (table
)->size
;
1829 tt
= XSTRING (table
)->data
;
1833 modify_region (current_buffer
, pos
, stop
);
1836 for (; pos
< stop
; ++pos
)
1838 oc
= FETCH_BYTE (pos
);
1844 record_change (pos
, 1);
1845 *(POS_ADDR (pos
)) = nc
;
1846 signal_after_change (pos
, 1, 1);
1852 XSETFASTINT (z
, cnt
);
1856 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
1857 "Delete the text between point and mark.\n\
1858 When called from a program, expects two arguments,\n\
1859 positions (integers or markers) specifying the stretch to be deleted.")
1861 Lisp_Object start
, end
;
1863 validate_region (&start
, &end
);
1864 del_range (XINT (start
), XINT (end
));
1868 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
1869 "Remove restrictions (narrowing) from current buffer.\n\
1870 This allows the buffer's full text to be seen and edited.")
1874 SET_BUF_ZV (current_buffer
, Z
);
1875 current_buffer
->clip_changed
= 1;
1876 /* Changing the buffer bounds invalidates any recorded current column. */
1877 invalidate_current_column ();
1881 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
1882 "Restrict editing in this buffer to the current region.\n\
1883 The rest of the text becomes temporarily invisible and untouchable\n\
1884 but is not deleted; if you save the buffer in a file, the invisible\n\
1885 text is included in the file. \\[widen] makes all visible again.\n\
1886 See also `save-restriction'.\n\
1888 When calling from a program, pass two arguments; positions (integers\n\
1889 or markers) bounding the text that should remain visible.")
1891 register Lisp_Object start
, end
;
1893 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1894 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1896 if (XINT (start
) > XINT (end
))
1899 tem
= start
; start
= end
; end
= tem
;
1902 if (!(BEG
<= XINT (start
) && XINT (start
) <= XINT (end
) && XINT (end
) <= Z
))
1903 args_out_of_range (start
, end
);
1905 BEGV
= XFASTINT (start
);
1906 SET_BUF_ZV (current_buffer
, XFASTINT (end
));
1907 if (PT
< XFASTINT (start
))
1908 SET_PT (XFASTINT (start
));
1909 if (PT
> XFASTINT (end
))
1910 SET_PT (XFASTINT (end
));
1911 current_buffer
->clip_changed
= 1;
1912 /* Changing the buffer bounds invalidates any recorded current column. */
1913 invalidate_current_column ();
1918 save_restriction_save ()
1920 register Lisp_Object bottom
, top
;
1921 /* Note: I tried using markers here, but it does not win
1922 because insertion at the end of the saved region
1923 does not advance mh and is considered "outside" the saved region. */
1924 XSETFASTINT (bottom
, BEGV
- BEG
);
1925 XSETFASTINT (top
, Z
- ZV
);
1927 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
1931 save_restriction_restore (data
)
1934 register struct buffer
*buf
;
1935 register int newhead
, newtail
;
1936 register Lisp_Object tem
;
1938 buf
= XBUFFER (XCONS (data
)->car
);
1940 data
= XCONS (data
)->cdr
;
1942 tem
= XCONS (data
)->car
;
1943 newhead
= XINT (tem
);
1944 tem
= XCONS (data
)->cdr
;
1945 newtail
= XINT (tem
);
1946 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1951 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1952 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1953 current_buffer
->clip_changed
= 1;
1955 /* If point is outside the new visible range, move it inside. */
1957 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1962 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1963 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1964 The buffer's restrictions make parts of the beginning and end invisible.\n\
1965 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1966 This special form, `save-restriction', saves the current buffer's restrictions\n\
1967 when it is entered, and restores them when it is exited.\n\
1968 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1969 The old restrictions settings are restored\n\
1970 even in case of abnormal exit (throw or error).\n\
1972 The value returned is the value of the last form in BODY.\n\
1974 `save-restriction' can get confused if, within the BODY, you widen\n\
1975 and then make changes outside the area within the saved restrictions.\n\
1977 Note: if you are using both `save-excursion' and `save-restriction',\n\
1978 use `save-excursion' outermost:\n\
1979 (save-excursion (save-restriction ...))")
1983 register Lisp_Object val
;
1984 int count
= specpdl_ptr
- specpdl
;
1986 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1987 val
= Fprogn (body
);
1988 return unbind_to (count
, val
);
1991 /* Buffer for the most recent text displayed by Fmessage. */
1992 static char *message_text
;
1994 /* Allocated length of that buffer. */
1995 static int message_length
;
1997 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
1998 "Print a one-line message at the bottom of the screen.\n\
1999 The first argument is a format control string, and the rest are data\n\
2000 to be formatted under control of the string. See `format' for details.\n\
2002 If the first argument is nil, clear any existing message; let the\n\
2003 minibuffer contents show.")
2015 register Lisp_Object val
;
2016 val
= Fformat (nargs
, args
);
2017 /* Copy the data so that it won't move when we GC. */
2020 message_text
= (char *)xmalloc (80);
2021 message_length
= 80;
2023 if (XSTRING (val
)->size
> message_length
)
2025 message_length
= XSTRING (val
)->size
;
2026 message_text
= (char *)xrealloc (message_text
, message_length
);
2028 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
2029 message2 (message_text
, XSTRING (val
)->size
);
2034 DEFUN ("message-box", Fmessage_box
, Smessage_box
, 1, MANY
, 0,
2035 "Display a message, in a dialog box if possible.\n\
2036 If a dialog box is not available, use the echo area.\n\
2037 The first argument is a format control string, and the rest are data\n\
2038 to be formatted under control of the string. See `format' for details.\n\
2040 If the first argument is nil, clear any existing message; let the\n\
2041 minibuffer contents show.")
2053 register Lisp_Object val
;
2054 val
= Fformat (nargs
, args
);
2057 Lisp_Object pane
, menu
, obj
;
2058 struct gcpro gcpro1
;
2059 pane
= Fcons (Fcons (build_string ("OK"), Qt
), Qnil
);
2061 menu
= Fcons (val
, pane
);
2062 obj
= Fx_popup_dialog (Qt
, menu
);
2066 #else /* not HAVE_MENUS */
2067 /* Copy the data so that it won't move when we GC. */
2070 message_text
= (char *)xmalloc (80);
2071 message_length
= 80;
2073 if (XSTRING (val
)->size
> message_length
)
2075 message_length
= XSTRING (val
)->size
;
2076 message_text
= (char *)xrealloc (message_text
, message_length
);
2078 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
2079 message2 (message_text
, XSTRING (val
)->size
);
2081 #endif /* not HAVE_MENUS */
2085 extern Lisp_Object last_nonmenu_event
;
2088 DEFUN ("message-or-box", Fmessage_or_box
, Smessage_or_box
, 1, MANY
, 0,
2089 "Display a message in a dialog box or in the echo area.\n\
2090 If this command was invoked with the mouse, use a dialog box.\n\
2091 Otherwise, use the echo area.\n\
2092 The first argument is a format control string, and the rest are data\n\
2093 to be formatted under control of the string. See `format' for details.\n\
2095 If the first argument is nil, clear any existing message; let the\n\
2096 minibuffer contents show.")
2102 if (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
2103 return Fmessage_box (nargs
, args
);
2105 return Fmessage (nargs
, args
);
2108 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
2109 "Format a string out of a control-string and arguments.\n\
2110 The first argument is a control string.\n\
2111 The other arguments are substituted into it to make the result, a string.\n\
2112 It may contain %-sequences meaning to substitute the next argument.\n\
2113 %s means print a string argument. Actually, prints any object, with `princ'.\n\
2114 %d means print as number in decimal (%o octal, %x hex).\n\
2115 %e means print a number in exponential notation.\n\
2116 %f means print a number in decimal-point notation.\n\
2117 %g means print a number in exponential notation\n\
2118 or decimal-point notation, whichever uses fewer characters.\n\
2119 %c means print a number as a single character.\n\
2120 %S means print any object as an s-expression (using prin1).\n\
2121 The argument used for %d, %o, %x, %e, %f, %g or %c must be a number.\n\
2122 Use %% to put a single % into the output.")
2125 register Lisp_Object
*args
;
2127 register int n
; /* The number of the next arg to substitute */
2128 register int total
= 5; /* An estimate of the final length */
2130 register unsigned char *format
, *end
;
2132 extern char *index ();
2133 /* It should not be necessary to GCPRO ARGS, because
2134 the caller in the interpreter should take care of that. */
2136 CHECK_STRING (args
[0], 0);
2137 format
= XSTRING (args
[0])->data
;
2138 end
= format
+ XSTRING (args
[0])->size
;
2141 while (format
!= end
)
2142 if (*format
++ == '%')
2146 /* Process a numeric arg and skip it. */
2147 minlen
= atoi (format
);
2151 while ((*format
>= '0' && *format
<= '9')
2152 || *format
== '-' || *format
== ' ' || *format
== '.')
2157 else if (++n
>= nargs
)
2158 error ("Not enough arguments for format string");
2159 else if (*format
== 'S')
2161 /* For `S', prin1 the argument and then treat like a string. */
2162 register Lisp_Object tem
;
2163 tem
= Fprin1_to_string (args
[n
], Qnil
);
2167 else if (SYMBOLP (args
[n
]))
2169 XSETSTRING (args
[n
], XSYMBOL (args
[n
])->name
);
2172 else if (STRINGP (args
[n
]))
2175 if (*format
!= 's' && *format
!= 'S')
2176 error ("format specifier doesn't match argument type");
2177 total
+= XSTRING (args
[n
])->size
;
2178 /* We have to put an arbitrary limit on minlen
2179 since otherwise it could make alloca fail. */
2180 if (minlen
< XSTRING (args
[n
])->size
+ 1000)
2183 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
2184 else if (INTEGERP (args
[n
]) && *format
!= 's')
2186 #ifdef LISP_FLOAT_TYPE
2187 /* The following loop assumes the Lisp type indicates
2188 the proper way to pass the argument.
2189 So make sure we have a flonum if the argument should
2191 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
2192 args
[n
] = Ffloat (args
[n
]);
2195 /* We have to put an arbitrary limit on minlen
2196 since otherwise it could make alloca fail. */
2200 #ifdef LISP_FLOAT_TYPE
2201 else if (FLOATP (args
[n
]) && *format
!= 's')
2203 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
2204 args
[n
] = Ftruncate (args
[n
]);
2206 /* We have to put an arbitrary limit on minlen
2207 since otherwise it could make alloca fail. */
2214 /* Anything but a string, convert to a string using princ. */
2215 register Lisp_Object tem
;
2216 tem
= Fprin1_to_string (args
[n
], Qt
);
2223 register int nstrings
= n
+ 1;
2225 /* Allocate twice as many strings as we have %-escapes; floats occupy
2226 two slots, and we're not sure how many of those we have. */
2227 register unsigned char **strings
2228 = (unsigned char **) alloca (2 * nstrings
* sizeof (unsigned char *));
2232 for (n
= 0; n
< nstrings
; n
++)
2235 strings
[i
++] = (unsigned char *) "";
2236 else if (INTEGERP (args
[n
]))
2237 /* We checked above that the corresponding format effector
2238 isn't %s, which would cause MPV. */
2239 strings
[i
++] = (unsigned char *) XINT (args
[n
]);
2240 #ifdef LISP_FLOAT_TYPE
2241 else if (FLOATP (args
[n
]))
2243 union { double d
; char *half
[2]; } u
;
2245 u
.d
= XFLOAT (args
[n
])->data
;
2246 strings
[i
++] = (unsigned char *) u
.half
[0];
2247 strings
[i
++] = (unsigned char *) u
.half
[1];
2251 /* The first string is treated differently
2252 because it is the format string. */
2253 strings
[i
++] = XSTRING (args
[n
])->data
;
2255 strings
[i
++] = (unsigned char *) XSTRING (args
[n
]);
2258 /* Make room in result for all the non-%-codes in the control string. */
2259 total
+= XSTRING (args
[0])->size
;
2261 /* Format it in bigger and bigger buf's until it all fits. */
2264 buf
= (char *) alloca (total
+ 1);
2267 length
= doprnt_lisp (buf
, total
+ 1, strings
[0],
2268 end
, i
-1, strings
+ 1);
2269 if (buf
[total
- 1] == 0)
2277 return make_string (buf
, length
);
2283 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
2284 EMACS_INT arg0
, arg1
, arg2
, arg3
, arg4
;
2298 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, args
);
2300 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, &string1
+ 1);
2302 return build_string (buf
);
2305 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
2306 "Return t if two characters match, optionally ignoring case.\n\
2307 Both arguments must be characters (i.e. integers).\n\
2308 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
2310 register Lisp_Object c1
, c2
;
2312 CHECK_NUMBER (c1
, 0);
2313 CHECK_NUMBER (c2
, 1);
2315 if (XINT (c1
) == XINT (c2
)
2316 && (NILP (current_buffer
->case_fold_search
)
2317 || DOWNCASE (XFASTINT (c1
)) == DOWNCASE (XFASTINT (c2
))))
2322 /* Transpose the markers in two regions of the current buffer, and
2323 adjust the ones between them if necessary (i.e.: if the regions
2326 Traverses the entire marker list of the buffer to do so, adding an
2327 appropriate amount to some, subtracting from some, and leaving the
2328 rest untouched. Most of this is copied from adjust_markers in insdel.c.
2330 It's the caller's job to see that (start1 <= end1 <= start2 <= end2). */
2333 transpose_markers (start1
, end1
, start2
, end2
)
2334 register int start1
, end1
, start2
, end2
;
2336 register int amt1
, amt2
, diff
, mpos
;
2337 register Lisp_Object marker
;
2339 /* Update point as if it were a marker. */
2343 TEMP_SET_PT (PT
+ (end2
- end1
));
2344 else if (PT
< start2
)
2345 TEMP_SET_PT (PT
+ (end2
- start2
) - (end1
- start1
));
2347 TEMP_SET_PT (PT
- (start2
- start1
));
2349 /* We used to adjust the endpoints here to account for the gap, but that
2350 isn't good enough. Even if we assume the caller has tried to move the
2351 gap out of our way, it might still be at start1 exactly, for example;
2352 and that places it `inside' the interval, for our purposes. The amount
2353 of adjustment is nontrivial if there's a `denormalized' marker whose
2354 position is between GPT and GPT + GAP_SIZE, so it's simpler to leave
2355 the dirty work to Fmarker_position, below. */
2357 /* The difference between the region's lengths */
2358 diff
= (end2
- start2
) - (end1
- start1
);
2360 /* For shifting each marker in a region by the length of the other
2361 * region plus the distance between the regions.
2363 amt1
= (end2
- start2
) + (start2
- end1
);
2364 amt2
= (end1
- start1
) + (start2
- end1
);
2366 for (marker
= BUF_MARKERS (current_buffer
); !NILP (marker
);
2367 marker
= XMARKER (marker
)->chain
)
2369 mpos
= Fmarker_position (marker
);
2370 if (mpos
>= start1
&& mpos
< end2
)
2374 else if (mpos
< start2
)
2378 if (mpos
> GPT
) mpos
+= GAP_SIZE
;
2379 XMARKER (marker
)->bufpos
= mpos
;
2384 DEFUN ("transpose-regions", Ftranspose_regions
, Stranspose_regions
, 4, 5, 0,
2385 "Transpose region START1 to END1 with START2 to END2.\n\
2386 The regions may not be overlapping, because the size of the buffer is\n\
2387 never changed in a transposition.\n\
2389 Optional fifth arg LEAVE_MARKERS, if non-nil, means don't transpose\n\
2390 any markers that happen to be located in the regions.\n\
2392 Transposing beyond buffer boundaries is an error.")
2393 (startr1
, endr1
, startr2
, endr2
, leave_markers
)
2394 Lisp_Object startr1
, endr1
, startr2
, endr2
, leave_markers
;
2396 register int start1
, end1
, start2
, end2
,
2397 gap
, len1
, len_mid
, len2
;
2398 unsigned char *start1_addr
, *start2_addr
, *temp
;
2400 #ifdef USE_TEXT_PROPERTIES
2401 INTERVAL cur_intv
, tmp_interval1
, tmp_interval_mid
, tmp_interval2
;
2402 cur_intv
= BUF_INTERVALS (current_buffer
);
2403 #endif /* USE_TEXT_PROPERTIES */
2405 validate_region (&startr1
, &endr1
);
2406 validate_region (&startr2
, &endr2
);
2408 start1
= XFASTINT (startr1
);
2409 end1
= XFASTINT (endr1
);
2410 start2
= XFASTINT (startr2
);
2411 end2
= XFASTINT (endr2
);
2414 /* Swap the regions if they're reversed. */
2417 register int glumph
= start1
;
2425 len1
= end1
- start1
;
2426 len2
= end2
- start2
;
2429 error ("transposed regions not properly ordered");
2430 else if (start1
== end1
|| start2
== end2
)
2431 error ("transposed region may not be of length 0");
2433 /* The possibilities are:
2434 1. Adjacent (contiguous) regions, or separate but equal regions
2435 (no, really equal, in this case!), or
2436 2. Separate regions of unequal size.
2438 The worst case is usually No. 2. It means that (aside from
2439 potential need for getting the gap out of the way), there also
2440 needs to be a shifting of the text between the two regions. So
2441 if they are spread far apart, we are that much slower... sigh. */
2443 /* It must be pointed out that the really studly thing to do would
2444 be not to move the gap at all, but to leave it in place and work
2445 around it if necessary. This would be extremely efficient,
2446 especially considering that people are likely to do
2447 transpositions near where they are working interactively, which
2448 is exactly where the gap would be found. However, such code
2449 would be much harder to write and to read. So, if you are
2450 reading this comment and are feeling squirrely, by all means have
2451 a go! I just didn't feel like doing it, so I will simply move
2452 the gap the minimum distance to get it out of the way, and then
2453 deal with an unbroken array. */
2455 /* Make sure the gap won't interfere, by moving it out of the text
2456 we will operate on. */
2457 if (start1
< gap
&& gap
< end2
)
2459 if (gap
- start1
< end2
- gap
)
2465 /* Hmmm... how about checking to see if the gap is large
2466 enough to use as the temporary storage? That would avoid an
2467 allocation... interesting. Later, don't fool with it now. */
2469 /* Working without memmove, for portability (sigh), so must be
2470 careful of overlapping subsections of the array... */
2472 if (end1
== start2
) /* adjacent regions */
2474 modify_region (current_buffer
, start1
, end2
);
2475 record_change (start1
, len1
+ len2
);
2477 #ifdef USE_TEXT_PROPERTIES
2478 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2479 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2480 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2481 #endif /* USE_TEXT_PROPERTIES */
2483 /* First region smaller than second. */
2486 /* We use alloca only if it is small,
2487 because we want to avoid stack overflow. */
2489 temp
= (unsigned char *) xmalloc (len2
);
2491 temp
= (unsigned char *) alloca (len2
);
2493 /* Don't precompute these addresses. We have to compute them
2494 at the last minute, because the relocating allocator might
2495 have moved the buffer around during the xmalloc. */
2496 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2497 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2499 bcopy (start2_addr
, temp
, len2
);
2500 bcopy (start1_addr
, start1_addr
+ len2
, len1
);
2501 bcopy (temp
, start1_addr
, len2
);
2506 /* First region not smaller than second. */
2509 temp
= (unsigned char *) xmalloc (len1
);
2511 temp
= (unsigned char *) alloca (len1
);
2512 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2513 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2514 bcopy (start1_addr
, temp
, len1
);
2515 bcopy (start2_addr
, start1_addr
, len2
);
2516 bcopy (temp
, start1_addr
+ len2
, len1
);
2520 #ifdef USE_TEXT_PROPERTIES
2521 graft_intervals_into_buffer (tmp_interval1
, start1
+ len2
,
2522 len1
, current_buffer
, 0);
2523 graft_intervals_into_buffer (tmp_interval2
, start1
,
2524 len2
, current_buffer
, 0);
2525 #endif /* USE_TEXT_PROPERTIES */
2527 /* Non-adjacent regions, because end1 != start2, bleagh... */
2531 /* Regions are same size, though, how nice. */
2533 modify_region (current_buffer
, start1
, end1
);
2534 modify_region (current_buffer
, start2
, end2
);
2535 record_change (start1
, len1
);
2536 record_change (start2
, len2
);
2537 #ifdef USE_TEXT_PROPERTIES
2538 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2539 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2540 Fset_text_properties (start1
, end1
, Qnil
, Qnil
);
2541 Fset_text_properties (start2
, end2
, Qnil
, Qnil
);
2542 #endif /* USE_TEXT_PROPERTIES */
2545 temp
= (unsigned char *) xmalloc (len1
);
2547 temp
= (unsigned char *) alloca (len1
);
2548 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2549 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2550 bcopy (start1_addr
, temp
, len1
);
2551 bcopy (start2_addr
, start1_addr
, len2
);
2552 bcopy (temp
, start2_addr
, len1
);
2555 #ifdef USE_TEXT_PROPERTIES
2556 graft_intervals_into_buffer (tmp_interval1
, start2
,
2557 len1
, current_buffer
, 0);
2558 graft_intervals_into_buffer (tmp_interval2
, start1
,
2559 len2
, current_buffer
, 0);
2560 #endif /* USE_TEXT_PROPERTIES */
2563 else if (len1
< len2
) /* Second region larger than first */
2564 /* Non-adjacent & unequal size, area between must also be shifted. */
2566 len_mid
= start2
- end1
;
2567 modify_region (current_buffer
, start1
, end2
);
2568 record_change (start1
, (end2
- start1
));
2569 #ifdef USE_TEXT_PROPERTIES
2570 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2571 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2572 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2573 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2574 #endif /* USE_TEXT_PROPERTIES */
2576 /* holds region 2 */
2578 temp
= (unsigned char *) xmalloc (len2
);
2580 temp
= (unsigned char *) alloca (len2
);
2581 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2582 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2583 bcopy (start2_addr
, temp
, len2
);
2584 bcopy (start1_addr
, start1_addr
+ len_mid
+ len2
, len1
);
2585 safe_bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2586 bcopy (temp
, start1_addr
, len2
);
2589 #ifdef USE_TEXT_PROPERTIES
2590 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2591 len1
, current_buffer
, 0);
2592 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2593 len_mid
, current_buffer
, 0);
2594 graft_intervals_into_buffer (tmp_interval2
, start1
,
2595 len2
, current_buffer
, 0);
2596 #endif /* USE_TEXT_PROPERTIES */
2599 /* Second region smaller than first. */
2601 len_mid
= start2
- end1
;
2602 record_change (start1
, (end2
- start1
));
2603 modify_region (current_buffer
, start1
, end2
);
2605 #ifdef USE_TEXT_PROPERTIES
2606 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2607 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2608 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2609 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2610 #endif /* USE_TEXT_PROPERTIES */
2612 /* holds region 1 */
2614 temp
= (unsigned char *) xmalloc (len1
);
2616 temp
= (unsigned char *) alloca (len1
);
2617 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2618 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2619 bcopy (start1_addr
, temp
, len1
);
2620 bcopy (start2_addr
, start1_addr
, len2
);
2621 bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2622 bcopy (temp
, start1_addr
+ len2
+ len_mid
, len1
);
2625 #ifdef USE_TEXT_PROPERTIES
2626 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2627 len1
, current_buffer
, 0);
2628 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2629 len_mid
, current_buffer
, 0);
2630 graft_intervals_into_buffer (tmp_interval2
, start1
,
2631 len2
, current_buffer
, 0);
2632 #endif /* USE_TEXT_PROPERTIES */
2636 /* todo: this will be slow, because for every transposition, we
2637 traverse the whole friggin marker list. Possible solutions:
2638 somehow get a list of *all* the markers across multiple
2639 transpositions and do it all in one swell phoop. Or maybe modify
2640 Emacs' marker code to keep an ordered list or tree. This might
2641 be nicer, and more beneficial in the long run, but would be a
2642 bunch of work. Plus the way they're arranged now is nice. */
2643 if (NILP (leave_markers
))
2645 transpose_markers (start1
, end1
, start2
, end2
);
2646 fix_overlays_in_range (start1
, end2
);
2658 Qbuffer_access_fontify_functions
2659 = intern ("buffer-access-fontify-functions");
2660 staticpro (&Qbuffer_access_fontify_functions
);
2662 DEFVAR_LISP ("buffer-access-fontify-functions",
2663 &Vbuffer_access_fontify_functions
,
2664 "List of functions called by `buffer-substring' to fontify if necessary.\n\
2665 Each function is called with two arguments which specify the range\n\
2666 of the buffer being accessed.");
2667 Vbuffer_access_fontify_functions
= Qnil
;
2671 extern Lisp_Object Vprin1_to_string_buffer
;
2672 obuf
= Fcurrent_buffer ();
2673 /* Do this here, because init_buffer_once is too early--it won't work. */
2674 Fset_buffer (Vprin1_to_string_buffer
);
2675 /* Make sure buffer-access-fontify-functions is nil in this buffer. */
2676 Fset (Fmake_local_variable (intern ("buffer-access-fontify-functions")),
2681 DEFVAR_LISP ("buffer-access-fontified-property",
2682 &Vbuffer_access_fontified_property
,
2683 "Property which (if non-nil) indicates text has been fontified.\n\
2684 `buffer-substring' need not call the `buffer-access-fontify-functions'\n\
2685 functions if all the text being accessed has this property.");
2686 Vbuffer_access_fontified_property
= Qnil
;
2688 DEFVAR_LISP ("system-name", &Vsystem_name
,
2689 "The name of the machine Emacs is running on.");
2691 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
2692 "The full name of the user logged in.");
2694 DEFVAR_LISP ("user-login-name", &Vuser_login_name
,
2695 "The user's name, taken from environment variables if possible.");
2697 DEFVAR_LISP ("user-real-login-name", &Vuser_real_login_name
,
2698 "The user's name, based upon the real uid only.");
2700 defsubr (&Schar_equal
);
2701 defsubr (&Sgoto_char
);
2702 defsubr (&Sstring_to_char
);
2703 defsubr (&Schar_to_string
);
2705 defsubr (&Sbuffer_substring
);
2706 defsubr (&Sbuffer_substring_no_properties
);
2707 defsubr (&Sbuffer_string
);
2709 defsubr (&Spoint_marker
);
2710 defsubr (&Smark_marker
);
2712 defsubr (&Sregion_beginning
);
2713 defsubr (&Sregion_end
);
2714 /* defsubr (&Smark); */
2715 /* defsubr (&Sset_mark); */
2716 defsubr (&Ssave_excursion
);
2717 defsubr (&Ssave_current_buffer
);
2719 defsubr (&Sbufsize
);
2720 defsubr (&Spoint_max
);
2721 defsubr (&Spoint_min
);
2722 defsubr (&Spoint_min_marker
);
2723 defsubr (&Spoint_max_marker
);
2725 defsubr (&Sline_beginning_position
);
2726 defsubr (&Sline_end_position
);
2732 defsubr (&Sfollowing_char
);
2733 defsubr (&Sprevious_char
);
2734 defsubr (&Schar_after
);
2735 defsubr (&Schar_before
);
2737 defsubr (&Sinsert_before_markers
);
2738 defsubr (&Sinsert_and_inherit
);
2739 defsubr (&Sinsert_and_inherit_before_markers
);
2740 defsubr (&Sinsert_char
);
2742 defsubr (&Suser_login_name
);
2743 defsubr (&Suser_real_login_name
);
2744 defsubr (&Suser_uid
);
2745 defsubr (&Suser_real_uid
);
2746 defsubr (&Suser_full_name
);
2747 defsubr (&Semacs_pid
);
2748 defsubr (&Scurrent_time
);
2749 defsubr (&Sformat_time_string
);
2750 defsubr (&Sdecode_time
);
2751 defsubr (&Sencode_time
);
2752 defsubr (&Scurrent_time_string
);
2753 defsubr (&Scurrent_time_zone
);
2754 defsubr (&Sset_time_zone_rule
);
2755 defsubr (&Ssystem_name
);
2756 defsubr (&Smessage
);
2757 defsubr (&Smessage_box
);
2758 defsubr (&Smessage_or_box
);
2761 defsubr (&Sinsert_buffer_substring
);
2762 defsubr (&Scompare_buffer_substrings
);
2763 defsubr (&Ssubst_char_in_region
);
2764 defsubr (&Stranslate_region
);
2765 defsubr (&Sdelete_region
);
2767 defsubr (&Snarrow_to_region
);
2768 defsubr (&Ssave_restriction
);
2769 defsubr (&Stranspose_regions
);