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 (PT
- 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
, 0, 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
;
580 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
583 if (n
< BEGV
|| n
>= ZV
)
587 XSETFASTINT (val
, FETCH_CHAR (n
));
591 DEFUN ("char-before", Fchar_before
, Schar_before
, 0, 1, 0,
592 "Return character in current buffer preceding position POS.\n\
593 POS is an integer or a buffer pointer.\n\
594 If POS is out of range, the value is nil.\n\
595 If `enable-multibyte-characters' is nil or POS is not at character boundary,\n\
596 multi-byte form is ignored, and only one byte preceding POS\n\
597 is returned as a character.")
601 register Lisp_Object val
;
608 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
611 if (n
< BEGV
|| n
>= ZV
)
615 if (!NILP (current_buffer
->enable_multibyte_characters
))
618 XSETFASTINT (val
, FETCH_CHAR (pos
));
623 XSETFASTINT (val
, FETCH_BYTE (pos
));
628 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 1, 0,
629 "Return the name under which the user logged in, as a string.\n\
630 This is based on the effective uid, not the real uid.\n\
631 Also, if the environment variable LOGNAME or USER is set,\n\
632 that determines the value of this function.\n\n\
633 If optional argument UID is an integer, return the login name of the user\n\
634 with that uid, or nil if there is no such user.")
640 /* Set up the user name info if we didn't do it before.
641 (That can happen if Emacs is dumpable
642 but you decide to run `temacs -l loadup' and not dump. */
643 if (INTEGERP (Vuser_login_name
))
647 return Vuser_login_name
;
649 CHECK_NUMBER (uid
, 0);
650 pw
= (struct passwd
*) getpwuid (XINT (uid
));
651 return (pw
? build_string (pw
->pw_name
) : Qnil
);
654 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
656 "Return the name of the user's real uid, as a string.\n\
657 This ignores the environment variables LOGNAME and USER, so it differs from\n\
658 `user-login-name' when running under `su'.")
661 /* Set up the user name info if we didn't do it before.
662 (That can happen if Emacs is dumpable
663 but you decide to run `temacs -l loadup' and not dump. */
664 if (INTEGERP (Vuser_login_name
))
666 return Vuser_real_login_name
;
669 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
670 "Return the effective uid of Emacs, as an integer.")
673 return make_number (geteuid ());
676 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
677 "Return the real uid of Emacs, as an integer.")
680 return make_number (getuid ());
683 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 1, 0,
684 "Return the full name of the user logged in, as a string.\n\
685 If optional argument UID is an integer, return the full name of the user\n\
686 with that uid, or \"unknown\" if there is no such user.\n\
687 If UID is a string, return the full name of the user with that login\n\
688 name, or \"unknown\" if no such user could be found.")
693 register char *p
, *q
;
694 extern char *index ();
698 return Vuser_full_name
;
699 else if (NUMBERP (uid
))
700 pw
= (struct passwd
*) getpwuid (XINT (uid
));
701 else if (STRINGP (uid
))
702 pw
= (struct passwd
*) getpwnam (XSTRING (uid
)->data
);
704 error ("Invalid UID specification");
709 p
= (unsigned char *) USER_FULL_NAME
;
710 /* Chop off everything after the first comma. */
711 q
= (unsigned char *) index (p
, ',');
712 full
= make_string (p
, q
? q
- p
: strlen (p
));
714 #ifdef AMPERSAND_FULL_NAME
715 p
= XSTRING (full
)->data
;
716 q
= (unsigned char *) index (p
, '&');
717 /* Substitute the login name for the &, upcasing the first character. */
723 login
= Fuser_login_name (make_number (pw
->pw_uid
));
724 r
= (unsigned char *) alloca (strlen (p
) + XSTRING (login
)->size
+ 1);
727 strcat (r
, XSTRING (login
)->data
);
728 r
[q
- p
] = UPCASE (r
[q
- p
]);
730 full
= build_string (r
);
732 #endif /* AMPERSAND_FULL_NAME */
737 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
738 "Return the name of the machine you are running on, as a string.")
744 /* For the benefit of callers who don't want to include lisp.h */
748 return (char *) XSTRING (Vsystem_name
)->data
;
751 DEFUN ("emacs-pid", Femacs_pid
, Semacs_pid
, 0, 0, 0,
752 "Return the process ID of Emacs, as an integer.")
755 return make_number (getpid ());
758 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
759 "Return the current time, as the number of seconds since 1970-01-01 00:00:00.\n\
760 The time is returned as a list of three integers. The first has the\n\
761 most significant 16 bits of the seconds, while the second has the\n\
762 least significant 16 bits. The third integer gives the microsecond\n\
765 The microsecond count is zero on systems that do not provide\n\
766 resolution finer than a second.")
770 Lisp_Object result
[3];
773 XSETINT (result
[0], (EMACS_SECS (t
) >> 16) & 0xffff);
774 XSETINT (result
[1], (EMACS_SECS (t
) >> 0) & 0xffff);
775 XSETINT (result
[2], EMACS_USECS (t
));
777 return Flist (3, result
);
782 lisp_time_argument (specified_time
, result
)
783 Lisp_Object specified_time
;
786 if (NILP (specified_time
))
787 return time (result
) != -1;
790 Lisp_Object high
, low
;
791 high
= Fcar (specified_time
);
792 CHECK_NUMBER (high
, 0);
793 low
= Fcdr (specified_time
);
796 CHECK_NUMBER (low
, 0);
797 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
798 return *result
>> 16 == XINT (high
);
802 DEFUN ("format-time-string", Fformat_time_string
, Sformat_time_string
, 1, 3, 0,
803 "Use FORMAT-STRING to format the time TIME, or now if omitted.\n\
804 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as returned by\n\
805 `current-time' or `file-attributes'.\n\
806 The third, optional, argument UNIVERSAL, if non-nil, means describe TIME\n\
807 as Universal Time; nil means describe TIME in the local time zone.\n\
808 The value is a copy of FORMAT-STRING, but with certain constructs replaced\n\
809 by text that describes the specified date and time in TIME:\n\
811 %Y is the year, %y within the century, %C the century.\n\
812 %G is the year corresponding to the ISO week, %g within the century.\n\
813 %m is the numeric month, %b and %h the abbreviated name, %B the full name.\n\
814 %d is the day of the month, zero-padded, %e is blank-padded.\n\
815 %u is the numeric day of week from 1 (Monday) to 7, %w from 0 (Sunday) to 6.\n\
816 %a is the abbreviated name of the day of week, %A the full name.\n\
817 %U is the week number starting on Sunday, %W starting on Monday,\n\
818 %V according to ISO 8601.\n\
819 %j is the day of the year.\n\
821 %H is the hour on a 24-hour clock, %I is on a 12-hour clock, %k is like %H\n\
822 only blank-padded, %l is like %I blank-padded.\n\
826 %Z is the time zone name, %z is the numeric form.\n\
827 %s is the number of seconds since 1970-01-01 00:00:00 +0000.\n\
829 %c is the locale's date and time format.\n\
830 %x is the locale's \"preferred\" date format.\n\
831 %D is like \"%m/%d/%y\".\n\
833 %R is like \"%H:%M\", %T is like \"%H:%M:%S\", %r is like \"%I:%M:%S %p\".\n\
834 %X is the locale's \"preferred\" time format.\n\
836 Finally, %n is like \n, %t is like \t, %% is a literal %.\n\
838 Certain flags and modifiers are available with some format controls.
839 The flags are `_' and `-'. For certain characters X, %_X is like %X,\n\
840 but padded with blanks; %-X is like %X, but without padding.\n\
841 %NX (where N stands for an integer) is like %X,\n\
842 but takes up at least N (a number) positions.\n\
843 The modifiers are `E' and `O'. For certain characters X,\n\
844 %EX is a locale's alternative version of %X;\n\
845 %OX is like %X, but uses the locale's number symbols.\n\
847 For example, to produce full ISO 8601 format, use \"%Y-%m-%dT%T%z\".")
848 (format_string
, time
, universal
)
849 Lisp_Object format_string
, time
, universal
;
854 CHECK_STRING (format_string
, 1);
856 if (! lisp_time_argument (time
, &value
))
857 error ("Invalid time specification");
859 /* This is probably enough. */
860 size
= XSTRING (format_string
)->size
* 6 + 50;
864 char *buf
= (char *) alloca (size
+ 1);
867 result
= emacs_strftime (buf
, size
, XSTRING (format_string
)->data
,
868 (NILP (universal
) ? localtime (&value
)
870 if (result
> 0 && result
< size
)
871 return build_string (buf
);
873 error ("Invalid time format specification");
875 /* If buffer was too small, make it bigger and try again. */
876 result
= emacs_strftime (buf
, 0, XSTRING (format_string
)->data
,
877 (NILP (universal
) ? localtime (&value
)
883 DEFUN ("decode-time", Fdecode_time
, Sdecode_time
, 0, 1, 0,
884 "Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE).\n\
885 The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED)\n\
886 or (HIGH . LOW), as from `current-time' and `file-attributes', or `nil'\n\
887 to use the current time. The list has the following nine members:\n\
888 SEC is an integer between 0 and 60; SEC is 60 for a leap second, which\n\
889 only some operating systems support. MINUTE is an integer between 0 and 59.\n\
890 HOUR is an integer between 0 and 23. DAY is an integer between 1 and 31.\n\
891 MONTH is an integer between 1 and 12. YEAR is an integer indicating the\n\
892 four-digit year. DOW is the day of week, an integer between 0 and 6, where\n\
893 0 is Sunday. DST is t if daylight savings time is effect, otherwise nil.\n\
894 ZONE is an integer indicating the number of seconds east of Greenwich.\n\
895 \(Note that Common Lisp has different meanings for DOW and ZONE.)")
897 Lisp_Object specified_time
;
901 struct tm
*decoded_time
;
902 Lisp_Object list_args
[9];
904 if (! lisp_time_argument (specified_time
, &time_spec
))
905 error ("Invalid time specification");
907 decoded_time
= localtime (&time_spec
);
908 XSETFASTINT (list_args
[0], decoded_time
->tm_sec
);
909 XSETFASTINT (list_args
[1], decoded_time
->tm_min
);
910 XSETFASTINT (list_args
[2], decoded_time
->tm_hour
);
911 XSETFASTINT (list_args
[3], decoded_time
->tm_mday
);
912 XSETFASTINT (list_args
[4], decoded_time
->tm_mon
+ 1);
913 XSETINT (list_args
[5], decoded_time
->tm_year
+ 1900);
914 XSETFASTINT (list_args
[6], decoded_time
->tm_wday
);
915 list_args
[7] = (decoded_time
->tm_isdst
)? Qt
: Qnil
;
917 /* Make a copy, in case gmtime modifies the struct. */
918 save_tm
= *decoded_time
;
919 decoded_time
= gmtime (&time_spec
);
920 if (decoded_time
== 0)
923 XSETINT (list_args
[8], tm_diff (&save_tm
, decoded_time
));
924 return Flist (9, list_args
);
927 DEFUN ("encode-time", Fencode_time
, Sencode_time
, 6, MANY
, 0,
928 "Convert SECOND, MINUTE, HOUR, DAY, MONTH, YEAR and ZONE to internal time.\n\
929 This is the reverse operation of `decode-time', which see.\n\
930 ZONE defaults to the current time zone rule. This can\n\
931 be a string or t (as from `set-time-zone-rule'), or it can be a list\n\
932 \(as from `current-time-zone') or an integer (as from `decode-time')\n\
933 applied without consideration for daylight savings time.\n\
935 You can pass more than 7 arguments; then the first six arguments\n\
936 are used as SECOND through YEAR, and the *last* argument is used as ZONE.\n\
937 The intervening arguments are ignored.\n\
938 This feature lets (apply 'encode-time (decode-time ...)) work.\n\
940 Out-of-range values for SEC, MINUTE, HOUR, DAY, or MONTH are allowed;\n\
941 for example, a DAY of 0 means the day preceding the given month.\n\
942 Year numbers less than 100 are treated just like other year numbers.\n\
943 If you want them to stand for years in this century, you must do that yourself.")
946 register Lisp_Object
*args
;
950 Lisp_Object zone
= (nargs
> 6 ? args
[nargs
- 1] : Qnil
);
952 CHECK_NUMBER (args
[0], 0); /* second */
953 CHECK_NUMBER (args
[1], 1); /* minute */
954 CHECK_NUMBER (args
[2], 2); /* hour */
955 CHECK_NUMBER (args
[3], 3); /* day */
956 CHECK_NUMBER (args
[4], 4); /* month */
957 CHECK_NUMBER (args
[5], 5); /* year */
959 tm
.tm_sec
= XINT (args
[0]);
960 tm
.tm_min
= XINT (args
[1]);
961 tm
.tm_hour
= XINT (args
[2]);
962 tm
.tm_mday
= XINT (args
[3]);
963 tm
.tm_mon
= XINT (args
[4]) - 1;
964 tm
.tm_year
= XINT (args
[5]) - 1900;
975 char **oldenv
= environ
, **newenv
;
979 else if (STRINGP (zone
))
980 tzstring
= (char *) XSTRING (zone
)->data
;
981 else if (INTEGERP (zone
))
983 int abszone
= abs (XINT (zone
));
984 sprintf (tzbuf
, "XXX%s%d:%02d:%02d", "-" + (XINT (zone
) < 0),
985 abszone
/ (60*60), (abszone
/60) % 60, abszone
% 60);
989 error ("Invalid time zone specification");
991 /* Set TZ before calling mktime; merely adjusting mktime's returned
992 value doesn't suffice, since that would mishandle leap seconds. */
993 set_time_zone_rule (tzstring
);
997 /* Restore TZ to previous value. */
1001 #ifdef LOCALTIME_CACHE
1006 if (time
== (time_t) -1)
1007 error ("Specified time is not representable");
1009 return make_time (time
);
1012 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
1013 "Return the current time, as a human-readable string.\n\
1014 Programs can use this function to decode a time,\n\
1015 since the number of columns in each field is fixed.\n\
1016 The format is `Sun Sep 16 01:03:52 1973'.\n\
1017 However, see also the functions `decode-time' and `format-time-string'\n\
1018 which provide a much more powerful and general facility.\n\
1020 If an argument is given, it specifies a time to format\n\
1021 instead of the current time. The argument should have the form:\n\
1024 (HIGH LOW . IGNORED).\n\
1025 Thus, you can use times obtained from `current-time'\n\
1026 and from `file-attributes'.")
1028 Lisp_Object specified_time
;
1034 if (! lisp_time_argument (specified_time
, &value
))
1036 tem
= (char *) ctime (&value
);
1038 strncpy (buf
, tem
, 24);
1041 return build_string (buf
);
1044 #define TM_YEAR_BASE 1900
1046 /* Yield A - B, measured in seconds.
1047 This function is copied from the GNU C Library. */
1052 /* Compute intervening leap days correctly even if year is negative.
1053 Take care to avoid int overflow in leap day calculations,
1054 but it's OK to assume that A and B are close to each other. */
1055 int a4
= (a
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (a
->tm_year
& 3);
1056 int b4
= (b
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (b
->tm_year
& 3);
1057 int a100
= a4
/ 25 - (a4
% 25 < 0);
1058 int b100
= b4
/ 25 - (b4
% 25 < 0);
1059 int a400
= a100
>> 2;
1060 int b400
= b100
>> 2;
1061 int intervening_leap_days
= (a4
- b4
) - (a100
- b100
) + (a400
- b400
);
1062 int years
= a
->tm_year
- b
->tm_year
;
1063 int days
= (365 * years
+ intervening_leap_days
1064 + (a
->tm_yday
- b
->tm_yday
));
1065 return (60 * (60 * (24 * days
+ (a
->tm_hour
- b
->tm_hour
))
1066 + (a
->tm_min
- b
->tm_min
))
1067 + (a
->tm_sec
- b
->tm_sec
));
1070 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
1071 "Return the offset and name for the local time zone.\n\
1072 This returns a list of the form (OFFSET NAME).\n\
1073 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
1074 A negative value means west of Greenwich.\n\
1075 NAME is a string giving the name of the time zone.\n\
1076 If an argument is given, it specifies when the time zone offset is determined\n\
1077 instead of using the current time. The argument should have the form:\n\
1080 (HIGH LOW . IGNORED).\n\
1081 Thus, you can use times obtained from `current-time'\n\
1082 and from `file-attributes'.\n\
1084 Some operating systems cannot provide all this information to Emacs;\n\
1085 in this case, `current-time-zone' returns a list containing nil for\n\
1086 the data it can't find.")
1088 Lisp_Object specified_time
;
1093 if (lisp_time_argument (specified_time
, &value
)
1094 && (t
= gmtime (&value
)) != 0)
1100 gmt
= *t
; /* Make a copy, in case localtime modifies *t. */
1101 t
= localtime (&value
);
1102 offset
= tm_diff (t
, &gmt
);
1106 s
= (char *)t
->tm_zone
;
1107 #else /* not HAVE_TM_ZONE */
1109 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
1110 s
= tzname
[t
->tm_isdst
];
1112 #endif /* not HAVE_TM_ZONE */
1115 /* No local time zone name is available; use "+-NNNN" instead. */
1116 int am
= (offset
< 0 ? -offset
: offset
) / 60;
1117 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
1120 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
1123 return Fmake_list (2, Qnil
);
1126 /* This holds the value of `environ' produced by the previous
1127 call to Fset_time_zone_rule, or 0 if Fset_time_zone_rule
1128 has never been called. */
1129 static char **environbuf
;
1131 DEFUN ("set-time-zone-rule", Fset_time_zone_rule
, Sset_time_zone_rule
, 1, 1, 0,
1132 "Set the local time zone using TZ, a string specifying a time zone rule.\n\
1133 If TZ is nil, use implementation-defined default time zone information.\n\
1134 If TZ is t, use Universal Time.")
1146 CHECK_STRING (tz
, 0);
1147 tzstring
= (char *) XSTRING (tz
)->data
;
1150 set_time_zone_rule (tzstring
);
1153 environbuf
= environ
;
1158 #ifdef LOCALTIME_CACHE
1160 /* These two values are known to load tz files in buggy implementations,
1161 i.e. Solaris 1 executables running under either Solaris 1 or Solaris 2.
1162 Their values shouldn't matter in non-buggy implementations.
1163 We don't use string literals for these strings,
1164 since if a string in the environment is in readonly
1165 storage, it runs afoul of bugs in SVR4 and Solaris 2.3.
1166 See Sun bugs 1113095 and 1114114, ``Timezone routines
1167 improperly modify environment''. */
1169 static char set_time_zone_rule_tz1
[] = "TZ=GMT+0";
1170 static char set_time_zone_rule_tz2
[] = "TZ=GMT+1";
1174 /* Set the local time zone rule to TZSTRING.
1175 This allocates memory into `environ', which it is the caller's
1176 responsibility to free. */
1178 set_time_zone_rule (tzstring
)
1182 char **from
, **to
, **newenv
;
1184 /* Make the ENVIRON vector longer with room for TZSTRING. */
1185 for (from
= environ
; *from
; from
++)
1187 envptrs
= from
- environ
+ 2;
1188 newenv
= to
= (char **) xmalloc (envptrs
* sizeof (char *)
1189 + (tzstring
? strlen (tzstring
) + 4 : 0));
1191 /* Add TZSTRING to the end of environ, as a value for TZ. */
1194 char *t
= (char *) (to
+ envptrs
);
1196 strcat (t
, tzstring
);
1200 /* Copy the old environ vector elements into NEWENV,
1201 but don't copy the TZ variable.
1202 So we have only one definition of TZ, which came from TZSTRING. */
1203 for (from
= environ
; *from
; from
++)
1204 if (strncmp (*from
, "TZ=", 3) != 0)
1210 /* If we do have a TZSTRING, NEWENV points to the vector slot where
1211 the TZ variable is stored. If we do not have a TZSTRING,
1212 TO points to the vector slot which has the terminating null. */
1214 #ifdef LOCALTIME_CACHE
1216 /* In SunOS 4.1.3_U1 and 4.1.4, if TZ has a value like
1217 "US/Pacific" that loads a tz file, then changes to a value like
1218 "XXX0" that does not load a tz file, and then changes back to
1219 its original value, the last change is (incorrectly) ignored.
1220 Also, if TZ changes twice in succession to values that do
1221 not load a tz file, tzset can dump core (see Sun bug#1225179).
1222 The following code works around these bugs. */
1226 /* Temporarily set TZ to a value that loads a tz file
1227 and that differs from tzstring. */
1229 *newenv
= (strcmp (tzstring
, set_time_zone_rule_tz1
+ 3) == 0
1230 ? set_time_zone_rule_tz2
: set_time_zone_rule_tz1
);
1236 /* The implied tzstring is unknown, so temporarily set TZ to
1237 two different values that each load a tz file. */
1238 *to
= set_time_zone_rule_tz1
;
1241 *to
= set_time_zone_rule_tz2
;
1246 /* Now TZ has the desired value, and tzset can be invoked safely. */
1253 /* Insert NARGS Lisp objects in the array ARGS by calling INSERT_FUNC
1254 (if a type of object is Lisp_Int) or INSERT_FROM_STRING_FUNC (if a
1255 type of object is Lisp_String). INHERIT is passed to
1256 INSERT_FROM_STRING_FUNC as the last argument. */
1258 general_insert_function (insert_func
, insert_from_string_func
,
1259 inherit
, nargs
, args
)
1260 int (*insert_func
)(), (*insert_from_string_func
)();
1262 register Lisp_Object
*args
;
1264 register int argnum
;
1265 register Lisp_Object val
;
1267 for (argnum
= 0; argnum
< nargs
; argnum
++)
1273 char workbuf
[4], *str
;
1276 if (!NILP (current_buffer
->enable_multibyte_characters
))
1277 len
= CHAR_STRING (XFASTINT (val
), workbuf
, str
);
1279 workbuf
[0] = XINT (val
), str
= workbuf
, len
= 1;
1280 (*insert_func
) (str
, len
);
1282 else if (STRINGP (val
))
1284 (*insert_from_string_func
) (val
, 0, XSTRING (val
)->size
, inherit
);
1288 val
= wrong_type_argument (Qchar_or_string_p
, val
);
1302 /* Callers passing one argument to Finsert need not gcpro the
1303 argument "array", since the only element of the array will
1304 not be used after calling insert or insert_from_string, so
1305 we don't care if it gets trashed. */
1307 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
1308 "Insert the arguments, either strings or characters, at point.\n\
1309 Point and before-insertion-markers move forward so that it ends up\n\
1310 after the inserted text.\n\
1311 Any other markers at the point of insertion remain before the text.")
1314 register Lisp_Object
*args
;
1316 general_insert_function (insert
, insert_from_string
, 0, nargs
, args
);
1320 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
1322 "Insert the arguments at point, inheriting properties from adjoining text.\n\
1323 Point and before-insertion-markers move forward so that it ends up\n\
1324 after the inserted text.\n\
1325 Any other markers at the point of insertion remain before the text.")
1328 register Lisp_Object
*args
;
1330 general_insert_function (insert_and_inherit
, insert_from_string
, 1,
1335 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
1336 "Insert strings or characters at point, relocating markers after the text.\n\
1337 Point and before-insertion-markers move forward so that it ends up\n\
1338 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
,
1345 insert_from_string_before_markers
, 0,
1350 DEFUN ("insert-before-markers-and-inherit", Finsert_and_inherit_before_markers
,
1351 Sinsert_and_inherit_before_markers
, 0, MANY
, 0,
1352 "Insert text at point, relocating markers and inheriting properties.\n\
1353 Point moves forward so that it ends up after the inserted text.\n\
1354 Any other markers at the point of insertion also end up after the text.")
1357 register Lisp_Object
*args
;
1359 general_insert_function (insert_before_markers_and_inherit
,
1360 insert_from_string_before_markers
, 1,
1365 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 3, 0,
1366 "Insert COUNT (second arg) copies of CHARACTER (first arg).\n\
1367 Point and before-insertion-markers are affected as in the function `insert'.\n\
1368 Both arguments are required.\n\
1369 The optional third arg INHERIT, if non-nil, says to inherit text properties\n\
1370 from adjoining text, if those properties are sticky.")
1371 (character
, count
, inherit
)
1372 Lisp_Object character
, count
, inherit
;
1374 register unsigned char *string
;
1375 register int strlen
;
1378 unsigned char workbuf
[4], *str
;
1380 CHECK_NUMBER (character
, 0);
1381 CHECK_NUMBER (count
, 1);
1383 if (!NILP (current_buffer
->enable_multibyte_characters
))
1384 len
= CHAR_STRING (XFASTINT (character
), workbuf
, str
);
1386 workbuf
[0] = XFASTINT (character
), str
= workbuf
, len
= 1;
1387 n
= XINT (count
) * len
;
1390 strlen
= min (n
, 256 * len
);
1391 string
= (unsigned char *) alloca (strlen
);
1392 for (i
= 0; i
< strlen
; i
++)
1393 string
[i
] = str
[i
% len
];
1397 if (!NILP (inherit
))
1398 insert_and_inherit (string
, strlen
);
1400 insert (string
, strlen
);
1405 if (!NILP (inherit
))
1406 insert_and_inherit (string
, n
);
1414 /* Making strings from buffer contents. */
1416 /* Return a Lisp_String containing the text of the current buffer from
1417 START to END. If text properties are in use and the current buffer
1418 has properties in the range specified, the resulting string will also
1419 have them, if PROPS is nonzero.
1421 We don't want to use plain old make_string here, because it calls
1422 make_uninit_string, which can cause the buffer arena to be
1423 compacted. make_string has no way of knowing that the data has
1424 been moved, and thus copies the wrong data into the string. This
1425 doesn't effect most of the other users of make_string, so it should
1426 be left as is. But we should use this function when conjuring
1427 buffer substrings. */
1430 make_buffer_string (start
, end
, props
)
1434 Lisp_Object result
, tem
, tem1
;
1436 if (start
< GPT
&& GPT
< end
)
1439 result
= make_uninit_string (end
- start
);
1440 bcopy (POS_ADDR (start
), XSTRING (result
)->data
, end
- start
);
1442 /* If desired, update and copy the text properties. */
1443 #ifdef USE_TEXT_PROPERTIES
1446 update_buffer_properties (start
, end
);
1448 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
1449 tem1
= Ftext_properties_at (make_number (start
), Qnil
);
1451 if (XINT (tem
) != end
|| !NILP (tem1
))
1452 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
1459 /* Call Vbuffer_access_fontify_functions for the range START ... END
1460 in the current buffer, if necessary. */
1463 update_buffer_properties (start
, end
)
1466 #ifdef USE_TEXT_PROPERTIES
1467 /* If this buffer has some access functions,
1468 call them, specifying the range of the buffer being accessed. */
1469 if (!NILP (Vbuffer_access_fontify_functions
))
1471 Lisp_Object args
[3];
1474 args
[0] = Qbuffer_access_fontify_functions
;
1475 XSETINT (args
[1], start
);
1476 XSETINT (args
[2], end
);
1478 /* But don't call them if we can tell that the work
1479 has already been done. */
1480 if (!NILP (Vbuffer_access_fontified_property
))
1482 tem
= Ftext_property_any (args
[1], args
[2],
1483 Vbuffer_access_fontified_property
,
1486 Frun_hook_with_args (3, args
);
1489 Frun_hook_with_args (3, args
);
1494 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
1495 "Return the contents of part of the current buffer as a string.\n\
1496 The two arguments START and END are character positions;\n\
1497 they can be in either order.")
1499 Lisp_Object start
, end
;
1503 validate_region (&start
, &end
);
1507 return make_buffer_string (b
, e
, 1);
1510 DEFUN ("buffer-substring-no-properties", Fbuffer_substring_no_properties
,
1511 Sbuffer_substring_no_properties
, 2, 2, 0,
1512 "Return the characters of part of the buffer, without the text properties.\n\
1513 The two arguments START and END are character positions;\n\
1514 they can be in either order.")
1516 Lisp_Object start
, end
;
1520 validate_region (&start
, &end
);
1524 return make_buffer_string (b
, e
, 0);
1527 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
1528 "Return the contents of the current buffer as a string.\n\
1529 If narrowing is in effect, this function returns only the visible part\n\
1533 return make_buffer_string (BEGV
, ZV
, 1);
1536 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
1538 "Insert before point a substring of the contents of buffer BUFFER.\n\
1539 BUFFER may be a buffer or a buffer name.\n\
1540 Arguments START and END are character numbers specifying the substring.\n\
1541 They default to the beginning and the end of BUFFER.")
1543 Lisp_Object buf
, start
, end
;
1545 register int b
, e
, temp
;
1546 register struct buffer
*bp
, *obuf
;
1549 buffer
= Fget_buffer (buf
);
1552 bp
= XBUFFER (buffer
);
1553 if (NILP (bp
->name
))
1554 error ("Selecting deleted buffer");
1560 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1567 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1572 temp
= b
, b
= e
, e
= temp
;
1574 if (!(BUF_BEGV (bp
) <= b
&& e
<= BUF_ZV (bp
)))
1575 args_out_of_range (start
, end
);
1577 obuf
= current_buffer
;
1578 set_buffer_internal_1 (bp
);
1579 update_buffer_properties (b
, e
);
1580 set_buffer_internal_1 (obuf
);
1582 insert_from_buffer (bp
, b
, e
- b
, 0);
1586 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
1588 "Compare two substrings of two buffers; return result as number.\n\
1589 the value is -N if first string is less after N-1 chars,\n\
1590 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
1591 Each substring is represented as three arguments: BUFFER, START and END.\n\
1592 That makes six args in all, three for each substring.\n\n\
1593 The value of `case-fold-search' in the current buffer\n\
1594 determines whether case is significant or ignored.")
1595 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
1596 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
1598 register int begp1
, endp1
, begp2
, endp2
, temp
, len1
, len2
, length
, i
;
1599 register struct buffer
*bp1
, *bp2
;
1600 register Lisp_Object
*trt
1601 = (!NILP (current_buffer
->case_fold_search
)
1602 ? XCHAR_TABLE (current_buffer
->case_canon_table
)->contents
: 0);
1604 /* Find the first buffer and its substring. */
1607 bp1
= current_buffer
;
1611 buf1
= Fget_buffer (buffer1
);
1614 bp1
= XBUFFER (buf1
);
1615 if (NILP (bp1
->name
))
1616 error ("Selecting deleted buffer");
1620 begp1
= BUF_BEGV (bp1
);
1623 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
1624 begp1
= XINT (start1
);
1627 endp1
= BUF_ZV (bp1
);
1630 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
1631 endp1
= XINT (end1
);
1635 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
1637 if (!(BUF_BEGV (bp1
) <= begp1
1639 && endp1
<= BUF_ZV (bp1
)))
1640 args_out_of_range (start1
, end1
);
1642 /* Likewise for second substring. */
1645 bp2
= current_buffer
;
1649 buf2
= Fget_buffer (buffer2
);
1652 bp2
= XBUFFER (buf2
);
1653 if (NILP (bp2
->name
))
1654 error ("Selecting deleted buffer");
1658 begp2
= BUF_BEGV (bp2
);
1661 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
1662 begp2
= XINT (start2
);
1665 endp2
= BUF_ZV (bp2
);
1668 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
1669 endp2
= XINT (end2
);
1673 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
1675 if (!(BUF_BEGV (bp2
) <= begp2
1677 && endp2
<= BUF_ZV (bp2
)))
1678 args_out_of_range (start2
, end2
);
1680 len1
= endp1
- begp1
;
1681 len2
= endp2
- begp2
;
1686 for (i
= 0; i
< length
; i
++)
1688 int c1
= *BUF_CHAR_ADDRESS (bp1
, begp1
+ i
);
1689 int c2
= *BUF_CHAR_ADDRESS (bp2
, begp2
+ i
);
1692 c1
= XINT (trt
[c1
]);
1693 c2
= XINT (trt
[c2
]);
1696 return make_number (- 1 - i
);
1698 return make_number (i
+ 1);
1701 /* The strings match as far as they go.
1702 If one is shorter, that one is less. */
1704 return make_number (length
+ 1);
1705 else if (length
< len2
)
1706 return make_number (- length
- 1);
1708 /* Same length too => they are equal. */
1709 return make_number (0);
1713 subst_char_in_region_unwind (arg
)
1716 return current_buffer
->undo_list
= arg
;
1720 subst_char_in_region_unwind_1 (arg
)
1723 return current_buffer
->filename
= arg
;
1726 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
1727 Ssubst_char_in_region
, 4, 5, 0,
1728 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
1729 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
1730 and don't mark the buffer as really changed.\n\
1731 Both characters must have the same length of multi-byte form.")
1732 (start
, end
, fromchar
, tochar
, noundo
)
1733 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
1735 register int pos
, stop
, i
, len
;
1737 unsigned char fromwork
[4], *fromstr
, towork
[4], *tostr
, *p
;
1738 int count
= specpdl_ptr
- specpdl
;
1740 validate_region (&start
, &end
);
1741 CHECK_NUMBER (fromchar
, 2);
1742 CHECK_NUMBER (tochar
, 3);
1744 if (! NILP (current_buffer
->enable_multibyte_characters
))
1746 len
= CHAR_STRING (XFASTINT (fromchar
), fromwork
, fromstr
);
1747 if (CHAR_STRING (XFASTINT (tochar
), towork
, tostr
) != len
)
1748 error ("Characters in subst-char-in-region have different byte-lengths");
1753 fromwork
[0] = XFASTINT (fromchar
), fromstr
= fromwork
;
1754 towork
[0] = XFASTINT (tochar
), tostr
= towork
;
1760 /* If we don't want undo, turn off putting stuff on the list.
1761 That's faster than getting rid of things,
1762 and it prevents even the entry for a first change.
1763 Also inhibit locking the file. */
1766 record_unwind_protect (subst_char_in_region_unwind
,
1767 current_buffer
->undo_list
);
1768 current_buffer
->undo_list
= Qt
;
1769 /* Don't do file-locking. */
1770 record_unwind_protect (subst_char_in_region_unwind_1
,
1771 current_buffer
->filename
);
1772 current_buffer
->filename
= Qnil
;
1776 stop
= min(stop
, GPT
);
1782 if (pos
>= XINT (end
)) break;
1786 if (p
[0] == fromstr
[0]
1788 || (p
[1] == fromstr
[1]
1789 && (len
== 2 || (p
[2] == fromstr
[2]
1790 && (len
== 3 || p
[3] == fromstr
[3]))))))
1794 modify_region (current_buffer
, XINT (start
), XINT (end
));
1796 if (! NILP (noundo
))
1798 if (MODIFF
- 1 == SAVE_MODIFF
)
1800 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
1801 current_buffer
->auto_save_modified
++;
1808 record_change (pos
, len
);
1809 for (i
= 0; i
< len
; i
++) *p
++ = tostr
[i
];
1817 signal_after_change (XINT (start
),
1818 stop
- XINT (start
), stop
- XINT (start
));
1820 unbind_to (count
, Qnil
);
1824 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
1825 "From START to END, translate characters according to TABLE.\n\
1826 TABLE is a string; the Nth character in it is the mapping\n\
1827 for the character with code N. Returns the number of characters changed.")
1831 register Lisp_Object table
;
1833 register int pos
, stop
; /* Limits of the region. */
1834 register unsigned char *tt
; /* Trans table. */
1835 register int oc
; /* Old character. */
1836 register int nc
; /* New character. */
1837 int cnt
; /* Number of changes made. */
1838 Lisp_Object z
; /* Return. */
1839 int size
; /* Size of translate table. */
1841 validate_region (&start
, &end
);
1842 CHECK_STRING (table
, 2);
1844 size
= XSTRING (table
)->size
;
1845 tt
= XSTRING (table
)->data
;
1849 modify_region (current_buffer
, pos
, stop
);
1852 for (; pos
< stop
; ++pos
)
1854 oc
= FETCH_BYTE (pos
);
1860 record_change (pos
, 1);
1861 *(POS_ADDR (pos
)) = nc
;
1862 signal_after_change (pos
, 1, 1);
1868 XSETFASTINT (z
, cnt
);
1872 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
1873 "Delete the text between point and mark.\n\
1874 When called from a program, expects two arguments,\n\
1875 positions (integers or markers) specifying the stretch to be deleted.")
1877 Lisp_Object start
, end
;
1879 validate_region (&start
, &end
);
1880 del_range (XINT (start
), XINT (end
));
1884 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
1885 "Remove restrictions (narrowing) from current buffer.\n\
1886 This allows the buffer's full text to be seen and edited.")
1890 SET_BUF_ZV (current_buffer
, Z
);
1891 current_buffer
->clip_changed
= 1;
1892 /* Changing the buffer bounds invalidates any recorded current column. */
1893 invalidate_current_column ();
1897 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
1898 "Restrict editing in this buffer to the current region.\n\
1899 The rest of the text becomes temporarily invisible and untouchable\n\
1900 but is not deleted; if you save the buffer in a file, the invisible\n\
1901 text is included in the file. \\[widen] makes all visible again.\n\
1902 See also `save-restriction'.\n\
1904 When calling from a program, pass two arguments; positions (integers\n\
1905 or markers) bounding the text that should remain visible.")
1907 register Lisp_Object start
, end
;
1909 CHECK_NUMBER_COERCE_MARKER (start
, 0);
1910 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1912 if (XINT (start
) > XINT (end
))
1915 tem
= start
; start
= end
; end
= tem
;
1918 if (!(BEG
<= XINT (start
) && XINT (start
) <= XINT (end
) && XINT (end
) <= Z
))
1919 args_out_of_range (start
, end
);
1921 BEGV
= XFASTINT (start
);
1922 SET_BUF_ZV (current_buffer
, XFASTINT (end
));
1923 if (PT
< XFASTINT (start
))
1924 SET_PT (XFASTINT (start
));
1925 if (PT
> XFASTINT (end
))
1926 SET_PT (XFASTINT (end
));
1927 current_buffer
->clip_changed
= 1;
1928 /* Changing the buffer bounds invalidates any recorded current column. */
1929 invalidate_current_column ();
1934 save_restriction_save ()
1936 register Lisp_Object bottom
, top
;
1937 /* Note: I tried using markers here, but it does not win
1938 because insertion at the end of the saved region
1939 does not advance mh and is considered "outside" the saved region. */
1940 XSETFASTINT (bottom
, BEGV
- BEG
);
1941 XSETFASTINT (top
, Z
- ZV
);
1943 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
1947 save_restriction_restore (data
)
1950 register struct buffer
*buf
;
1951 register int newhead
, newtail
;
1952 register Lisp_Object tem
;
1954 buf
= XBUFFER (XCONS (data
)->car
);
1956 data
= XCONS (data
)->cdr
;
1958 tem
= XCONS (data
)->car
;
1959 newhead
= XINT (tem
);
1960 tem
= XCONS (data
)->cdr
;
1961 newtail
= XINT (tem
);
1962 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1967 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1968 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1969 current_buffer
->clip_changed
= 1;
1971 /* If point is outside the new visible range, move it inside. */
1973 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1978 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1979 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1980 The buffer's restrictions make parts of the beginning and end invisible.\n\
1981 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1982 This special form, `save-restriction', saves the current buffer's restrictions\n\
1983 when it is entered, and restores them when it is exited.\n\
1984 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1985 The old restrictions settings are restored\n\
1986 even in case of abnormal exit (throw or error).\n\
1988 The value returned is the value of the last form in BODY.\n\
1990 `save-restriction' can get confused if, within the BODY, you widen\n\
1991 and then make changes outside the area within the saved restrictions.\n\
1993 Note: if you are using both `save-excursion' and `save-restriction',\n\
1994 use `save-excursion' outermost:\n\
1995 (save-excursion (save-restriction ...))")
1999 register Lisp_Object val
;
2000 int count
= specpdl_ptr
- specpdl
;
2002 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
2003 val
= Fprogn (body
);
2004 return unbind_to (count
, val
);
2007 /* Buffer for the most recent text displayed by Fmessage. */
2008 static char *message_text
;
2010 /* Allocated length of that buffer. */
2011 static int message_length
;
2013 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
2014 "Print a one-line message at the bottom of the screen.\n\
2015 The first argument is a format control string, and the rest are data\n\
2016 to be formatted under control of the string. See `format' for details.\n\
2018 If the first argument is nil, clear any existing message; let the\n\
2019 minibuffer contents show.")
2031 register Lisp_Object val
;
2032 val
= Fformat (nargs
, args
);
2033 /* Copy the data so that it won't move when we GC. */
2036 message_text
= (char *)xmalloc (80);
2037 message_length
= 80;
2039 if (XSTRING (val
)->size
> message_length
)
2041 message_length
= XSTRING (val
)->size
;
2042 message_text
= (char *)xrealloc (message_text
, message_length
);
2044 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
2045 message2 (message_text
, XSTRING (val
)->size
);
2050 DEFUN ("message-box", Fmessage_box
, Smessage_box
, 1, MANY
, 0,
2051 "Display a message, in a dialog box if possible.\n\
2052 If a dialog box is not available, use the echo area.\n\
2053 The first argument is a format control string, and the rest are data\n\
2054 to be formatted under control of the string. See `format' for details.\n\
2056 If the first argument is nil, clear any existing message; let the\n\
2057 minibuffer contents show.")
2069 register Lisp_Object val
;
2070 val
= Fformat (nargs
, args
);
2073 Lisp_Object pane
, menu
, obj
;
2074 struct gcpro gcpro1
;
2075 pane
= Fcons (Fcons (build_string ("OK"), Qt
), Qnil
);
2077 menu
= Fcons (val
, pane
);
2078 obj
= Fx_popup_dialog (Qt
, menu
);
2082 #else /* not HAVE_MENUS */
2083 /* Copy the data so that it won't move when we GC. */
2086 message_text
= (char *)xmalloc (80);
2087 message_length
= 80;
2089 if (XSTRING (val
)->size
> message_length
)
2091 message_length
= XSTRING (val
)->size
;
2092 message_text
= (char *)xrealloc (message_text
, message_length
);
2094 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
2095 message2 (message_text
, XSTRING (val
)->size
);
2097 #endif /* not HAVE_MENUS */
2101 extern Lisp_Object last_nonmenu_event
;
2104 DEFUN ("message-or-box", Fmessage_or_box
, Smessage_or_box
, 1, MANY
, 0,
2105 "Display a message in a dialog box or in the echo area.\n\
2106 If this command was invoked with the mouse, use a dialog box.\n\
2107 Otherwise, use the echo area.\n\
2108 The first argument is a format control string, and the rest are data\n\
2109 to be formatted under control of the string. See `format' for details.\n\
2111 If the first argument is nil, clear any existing message; let the\n\
2112 minibuffer contents show.")
2118 if (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
2119 return Fmessage_box (nargs
, args
);
2121 return Fmessage (nargs
, args
);
2124 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
2125 "Format a string out of a control-string and arguments.\n\
2126 The first argument is a control string.\n\
2127 The other arguments are substituted into it to make the result, a string.\n\
2128 It may contain %-sequences meaning to substitute the next argument.\n\
2129 %s means print a string argument. Actually, prints any object, with `princ'.\n\
2130 %d means print as number in decimal (%o octal, %x hex).\n\
2131 %e means print a number in exponential notation.\n\
2132 %f means print a number in decimal-point notation.\n\
2133 %g means print a number in exponential notation\n\
2134 or decimal-point notation, whichever uses fewer characters.\n\
2135 %c means print a number as a single character.\n\
2136 %S means print any object as an s-expression (using prin1).\n\
2137 The argument used for %d, %o, %x, %e, %f, %g or %c must be a number.\n\
2138 Use %% to put a single % into the output.")
2141 register Lisp_Object
*args
;
2143 register int n
; /* The number of the next arg to substitute */
2144 register int total
= 5; /* An estimate of the final length */
2146 register unsigned char *format
, *end
;
2148 extern char *index ();
2149 /* It should not be necessary to GCPRO ARGS, because
2150 the caller in the interpreter should take care of that. */
2152 CHECK_STRING (args
[0], 0);
2153 format
= XSTRING (args
[0])->data
;
2154 end
= format
+ XSTRING (args
[0])->size
;
2157 while (format
!= end
)
2158 if (*format
++ == '%')
2162 /* Process a numeric arg and skip it. */
2163 minlen
= atoi (format
);
2167 while ((*format
>= '0' && *format
<= '9')
2168 || *format
== '-' || *format
== ' ' || *format
== '.')
2173 else if (++n
>= nargs
)
2174 error ("Not enough arguments for format string");
2175 else if (*format
== 'S')
2177 /* For `S', prin1 the argument and then treat like a string. */
2178 register Lisp_Object tem
;
2179 tem
= Fprin1_to_string (args
[n
], Qnil
);
2183 else if (SYMBOLP (args
[n
]))
2185 XSETSTRING (args
[n
], XSYMBOL (args
[n
])->name
);
2188 else if (STRINGP (args
[n
]))
2191 if (*format
!= 's' && *format
!= 'S')
2192 error ("format specifier doesn't match argument type");
2193 total
+= XSTRING (args
[n
])->size
;
2194 /* We have to put an arbitrary limit on minlen
2195 since otherwise it could make alloca fail. */
2196 if (minlen
< XSTRING (args
[n
])->size
+ 1000)
2199 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
2200 else if (INTEGERP (args
[n
]) && *format
!= 's')
2202 #ifdef LISP_FLOAT_TYPE
2203 /* The following loop assumes the Lisp type indicates
2204 the proper way to pass the argument.
2205 So make sure we have a flonum if the argument should
2207 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
2208 args
[n
] = Ffloat (args
[n
]);
2211 /* We have to put an arbitrary limit on minlen
2212 since otherwise it could make alloca fail. */
2216 #ifdef LISP_FLOAT_TYPE
2217 else if (FLOATP (args
[n
]) && *format
!= 's')
2219 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
2220 args
[n
] = Ftruncate (args
[n
]);
2222 /* We have to put an arbitrary limit on minlen
2223 since otherwise it could make alloca fail. */
2230 /* Anything but a string, convert to a string using princ. */
2231 register Lisp_Object tem
;
2232 tem
= Fprin1_to_string (args
[n
], Qt
);
2239 register int nstrings
= n
+ 1;
2241 /* Allocate twice as many strings as we have %-escapes; floats occupy
2242 two slots, and we're not sure how many of those we have. */
2243 register unsigned char **strings
2244 = (unsigned char **) alloca (2 * nstrings
* sizeof (unsigned char *));
2248 for (n
= 0; n
< nstrings
; n
++)
2251 strings
[i
++] = (unsigned char *) "";
2252 else if (INTEGERP (args
[n
]))
2253 /* We checked above that the corresponding format effector
2254 isn't %s, which would cause MPV. */
2255 strings
[i
++] = (unsigned char *) XINT (args
[n
]);
2256 #ifdef LISP_FLOAT_TYPE
2257 else if (FLOATP (args
[n
]))
2259 union { double d
; char *half
[2]; } u
;
2261 u
.d
= XFLOAT (args
[n
])->data
;
2262 strings
[i
++] = (unsigned char *) u
.half
[0];
2263 strings
[i
++] = (unsigned char *) u
.half
[1];
2267 /* The first string is treated differently
2268 because it is the format string. */
2269 strings
[i
++] = XSTRING (args
[n
])->data
;
2271 strings
[i
++] = (unsigned char *) XSTRING (args
[n
]);
2274 /* Make room in result for all the non-%-codes in the control string. */
2275 total
+= XSTRING (args
[0])->size
;
2277 /* Format it in bigger and bigger buf's until it all fits. */
2280 buf
= (char *) alloca (total
+ 1);
2283 length
= doprnt_lisp (buf
, total
+ 1, strings
[0],
2284 end
, i
-1, strings
+ 1);
2285 if (buf
[total
- 1] == 0)
2293 return make_string (buf
, length
);
2299 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
2300 EMACS_INT arg0
, arg1
, arg2
, arg3
, arg4
;
2314 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, args
);
2316 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, &string1
+ 1);
2318 return build_string (buf
);
2321 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
2322 "Return t if two characters match, optionally ignoring case.\n\
2323 Both arguments must be characters (i.e. integers).\n\
2324 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
2326 register Lisp_Object c1
, c2
;
2328 CHECK_NUMBER (c1
, 0);
2329 CHECK_NUMBER (c2
, 1);
2331 if (XINT (c1
) == XINT (c2
)
2332 && (NILP (current_buffer
->case_fold_search
)
2333 || DOWNCASE (XFASTINT (c1
)) == DOWNCASE (XFASTINT (c2
))))
2338 /* Transpose the markers in two regions of the current buffer, and
2339 adjust the ones between them if necessary (i.e.: if the regions
2342 Traverses the entire marker list of the buffer to do so, adding an
2343 appropriate amount to some, subtracting from some, and leaving the
2344 rest untouched. Most of this is copied from adjust_markers in insdel.c.
2346 It's the caller's job to see that (start1 <= end1 <= start2 <= end2). */
2349 transpose_markers (start1
, end1
, start2
, end2
)
2350 register int start1
, end1
, start2
, end2
;
2352 register int amt1
, amt2
, diff
, mpos
;
2353 register Lisp_Object marker
;
2355 /* Update point as if it were a marker. */
2359 TEMP_SET_PT (PT
+ (end2
- end1
));
2360 else if (PT
< start2
)
2361 TEMP_SET_PT (PT
+ (end2
- start2
) - (end1
- start1
));
2363 TEMP_SET_PT (PT
- (start2
- start1
));
2365 /* We used to adjust the endpoints here to account for the gap, but that
2366 isn't good enough. Even if we assume the caller has tried to move the
2367 gap out of our way, it might still be at start1 exactly, for example;
2368 and that places it `inside' the interval, for our purposes. The amount
2369 of adjustment is nontrivial if there's a `denormalized' marker whose
2370 position is between GPT and GPT + GAP_SIZE, so it's simpler to leave
2371 the dirty work to Fmarker_position, below. */
2373 /* The difference between the region's lengths */
2374 diff
= (end2
- start2
) - (end1
- start1
);
2376 /* For shifting each marker in a region by the length of the other
2377 * region plus the distance between the regions.
2379 amt1
= (end2
- start2
) + (start2
- end1
);
2380 amt2
= (end1
- start1
) + (start2
- end1
);
2382 for (marker
= BUF_MARKERS (current_buffer
); !NILP (marker
);
2383 marker
= XMARKER (marker
)->chain
)
2385 mpos
= marker_position (marker
);
2386 if (mpos
>= start1
&& mpos
< end2
)
2390 else if (mpos
< start2
)
2394 if (mpos
> GPT
) mpos
+= GAP_SIZE
;
2395 XMARKER (marker
)->bufpos
= mpos
;
2400 DEFUN ("transpose-regions", Ftranspose_regions
, Stranspose_regions
, 4, 5, 0,
2401 "Transpose region START1 to END1 with START2 to END2.\n\
2402 The regions may not be overlapping, because the size of the buffer is\n\
2403 never changed in a transposition.\n\
2405 Optional fifth arg LEAVE_MARKERS, if non-nil, means don't transpose\n\
2406 any markers that happen to be located in the regions.\n\
2408 Transposing beyond buffer boundaries is an error.")
2409 (startr1
, endr1
, startr2
, endr2
, leave_markers
)
2410 Lisp_Object startr1
, endr1
, startr2
, endr2
, leave_markers
;
2412 register int start1
, end1
, start2
, end2
,
2413 gap
, len1
, len_mid
, len2
;
2414 unsigned char *start1_addr
, *start2_addr
, *temp
;
2416 #ifdef USE_TEXT_PROPERTIES
2417 INTERVAL cur_intv
, tmp_interval1
, tmp_interval_mid
, tmp_interval2
;
2418 cur_intv
= BUF_INTERVALS (current_buffer
);
2419 #endif /* USE_TEXT_PROPERTIES */
2421 validate_region (&startr1
, &endr1
);
2422 validate_region (&startr2
, &endr2
);
2424 start1
= XFASTINT (startr1
);
2425 end1
= XFASTINT (endr1
);
2426 start2
= XFASTINT (startr2
);
2427 end2
= XFASTINT (endr2
);
2430 /* Swap the regions if they're reversed. */
2433 register int glumph
= start1
;
2441 len1
= end1
- start1
;
2442 len2
= end2
- start2
;
2445 error ("transposed regions not properly ordered");
2446 else if (start1
== end1
|| start2
== end2
)
2447 error ("transposed region may not be of length 0");
2449 /* The possibilities are:
2450 1. Adjacent (contiguous) regions, or separate but equal regions
2451 (no, really equal, in this case!), or
2452 2. Separate regions of unequal size.
2454 The worst case is usually No. 2. It means that (aside from
2455 potential need for getting the gap out of the way), there also
2456 needs to be a shifting of the text between the two regions. So
2457 if they are spread far apart, we are that much slower... sigh. */
2459 /* It must be pointed out that the really studly thing to do would
2460 be not to move the gap at all, but to leave it in place and work
2461 around it if necessary. This would be extremely efficient,
2462 especially considering that people are likely to do
2463 transpositions near where they are working interactively, which
2464 is exactly where the gap would be found. However, such code
2465 would be much harder to write and to read. So, if you are
2466 reading this comment and are feeling squirrely, by all means have
2467 a go! I just didn't feel like doing it, so I will simply move
2468 the gap the minimum distance to get it out of the way, and then
2469 deal with an unbroken array. */
2471 /* Make sure the gap won't interfere, by moving it out of the text
2472 we will operate on. */
2473 if (start1
< gap
&& gap
< end2
)
2475 if (gap
- start1
< end2
- gap
)
2481 /* Hmmm... how about checking to see if the gap is large
2482 enough to use as the temporary storage? That would avoid an
2483 allocation... interesting. Later, don't fool with it now. */
2485 /* Working without memmove, for portability (sigh), so must be
2486 careful of overlapping subsections of the array... */
2488 if (end1
== start2
) /* adjacent regions */
2490 modify_region (current_buffer
, start1
, end2
);
2491 record_change (start1
, len1
+ len2
);
2493 #ifdef USE_TEXT_PROPERTIES
2494 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2495 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2496 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2497 #endif /* USE_TEXT_PROPERTIES */
2499 /* First region smaller than second. */
2502 /* We use alloca only if it is small,
2503 because we want to avoid stack overflow. */
2505 temp
= (unsigned char *) xmalloc (len2
);
2507 temp
= (unsigned char *) alloca (len2
);
2509 /* Don't precompute these addresses. We have to compute them
2510 at the last minute, because the relocating allocator might
2511 have moved the buffer around during the xmalloc. */
2512 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2513 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2515 bcopy (start2_addr
, temp
, len2
);
2516 bcopy (start1_addr
, start1_addr
+ len2
, len1
);
2517 bcopy (temp
, start1_addr
, len2
);
2522 /* First region not smaller than second. */
2525 temp
= (unsigned char *) xmalloc (len1
);
2527 temp
= (unsigned char *) alloca (len1
);
2528 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2529 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2530 bcopy (start1_addr
, temp
, len1
);
2531 bcopy (start2_addr
, start1_addr
, len2
);
2532 bcopy (temp
, start1_addr
+ len2
, len1
);
2536 #ifdef USE_TEXT_PROPERTIES
2537 graft_intervals_into_buffer (tmp_interval1
, start1
+ len2
,
2538 len1
, current_buffer
, 0);
2539 graft_intervals_into_buffer (tmp_interval2
, start1
,
2540 len2
, current_buffer
, 0);
2541 #endif /* USE_TEXT_PROPERTIES */
2543 /* Non-adjacent regions, because end1 != start2, bleagh... */
2547 /* Regions are same size, though, how nice. */
2549 modify_region (current_buffer
, start1
, end1
);
2550 modify_region (current_buffer
, start2
, end2
);
2551 record_change (start1
, len1
);
2552 record_change (start2
, len2
);
2553 #ifdef USE_TEXT_PROPERTIES
2554 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2555 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2556 Fset_text_properties (start1
, end1
, Qnil
, Qnil
);
2557 Fset_text_properties (start2
, end2
, Qnil
, Qnil
);
2558 #endif /* USE_TEXT_PROPERTIES */
2561 temp
= (unsigned char *) xmalloc (len1
);
2563 temp
= (unsigned char *) alloca (len1
);
2564 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2565 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2566 bcopy (start1_addr
, temp
, len1
);
2567 bcopy (start2_addr
, start1_addr
, len2
);
2568 bcopy (temp
, start2_addr
, len1
);
2571 #ifdef USE_TEXT_PROPERTIES
2572 graft_intervals_into_buffer (tmp_interval1
, start2
,
2573 len1
, current_buffer
, 0);
2574 graft_intervals_into_buffer (tmp_interval2
, start1
,
2575 len2
, current_buffer
, 0);
2576 #endif /* USE_TEXT_PROPERTIES */
2579 else if (len1
< len2
) /* Second region larger than first */
2580 /* Non-adjacent & unequal size, area between must also be shifted. */
2582 len_mid
= start2
- end1
;
2583 modify_region (current_buffer
, start1
, end2
);
2584 record_change (start1
, (end2
- start1
));
2585 #ifdef USE_TEXT_PROPERTIES
2586 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2587 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2588 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2589 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2590 #endif /* USE_TEXT_PROPERTIES */
2592 /* holds region 2 */
2594 temp
= (unsigned char *) xmalloc (len2
);
2596 temp
= (unsigned char *) alloca (len2
);
2597 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2598 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2599 bcopy (start2_addr
, temp
, len2
);
2600 bcopy (start1_addr
, start1_addr
+ len_mid
+ len2
, len1
);
2601 safe_bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2602 bcopy (temp
, start1_addr
, len2
);
2605 #ifdef USE_TEXT_PROPERTIES
2606 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2607 len1
, current_buffer
, 0);
2608 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2609 len_mid
, current_buffer
, 0);
2610 graft_intervals_into_buffer (tmp_interval2
, start1
,
2611 len2
, current_buffer
, 0);
2612 #endif /* USE_TEXT_PROPERTIES */
2615 /* Second region smaller than first. */
2617 len_mid
= start2
- end1
;
2618 record_change (start1
, (end2
- start1
));
2619 modify_region (current_buffer
, start1
, end2
);
2621 #ifdef USE_TEXT_PROPERTIES
2622 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2623 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2624 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2625 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2626 #endif /* USE_TEXT_PROPERTIES */
2628 /* holds region 1 */
2630 temp
= (unsigned char *) xmalloc (len1
);
2632 temp
= (unsigned char *) alloca (len1
);
2633 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2634 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2635 bcopy (start1_addr
, temp
, len1
);
2636 bcopy (start2_addr
, start1_addr
, len2
);
2637 bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2638 bcopy (temp
, start1_addr
+ len2
+ len_mid
, len1
);
2641 #ifdef USE_TEXT_PROPERTIES
2642 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2643 len1
, current_buffer
, 0);
2644 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2645 len_mid
, current_buffer
, 0);
2646 graft_intervals_into_buffer (tmp_interval2
, start1
,
2647 len2
, current_buffer
, 0);
2648 #endif /* USE_TEXT_PROPERTIES */
2652 /* todo: this will be slow, because for every transposition, we
2653 traverse the whole friggin marker list. Possible solutions:
2654 somehow get a list of *all* the markers across multiple
2655 transpositions and do it all in one swell phoop. Or maybe modify
2656 Emacs' marker code to keep an ordered list or tree. This might
2657 be nicer, and more beneficial in the long run, but would be a
2658 bunch of work. Plus the way they're arranged now is nice. */
2659 if (NILP (leave_markers
))
2661 transpose_markers (start1
, end1
, start2
, end2
);
2662 fix_overlays_in_range (start1
, end2
);
2674 Qbuffer_access_fontify_functions
2675 = intern ("buffer-access-fontify-functions");
2676 staticpro (&Qbuffer_access_fontify_functions
);
2678 DEFVAR_LISP ("buffer-access-fontify-functions",
2679 &Vbuffer_access_fontify_functions
,
2680 "List of functions called by `buffer-substring' to fontify if necessary.\n\
2681 Each function is called with two arguments which specify the range\n\
2682 of the buffer being accessed.");
2683 Vbuffer_access_fontify_functions
= Qnil
;
2687 extern Lisp_Object Vprin1_to_string_buffer
;
2688 obuf
= Fcurrent_buffer ();
2689 /* Do this here, because init_buffer_once is too early--it won't work. */
2690 Fset_buffer (Vprin1_to_string_buffer
);
2691 /* Make sure buffer-access-fontify-functions is nil in this buffer. */
2692 Fset (Fmake_local_variable (intern ("buffer-access-fontify-functions")),
2697 DEFVAR_LISP ("buffer-access-fontified-property",
2698 &Vbuffer_access_fontified_property
,
2699 "Property which (if non-nil) indicates text has been fontified.\n\
2700 `buffer-substring' need not call the `buffer-access-fontify-functions'\n\
2701 functions if all the text being accessed has this property.");
2702 Vbuffer_access_fontified_property
= Qnil
;
2704 DEFVAR_LISP ("system-name", &Vsystem_name
,
2705 "The name of the machine Emacs is running on.");
2707 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
2708 "The full name of the user logged in.");
2710 DEFVAR_LISP ("user-login-name", &Vuser_login_name
,
2711 "The user's name, taken from environment variables if possible.");
2713 DEFVAR_LISP ("user-real-login-name", &Vuser_real_login_name
,
2714 "The user's name, based upon the real uid only.");
2716 defsubr (&Schar_equal
);
2717 defsubr (&Sgoto_char
);
2718 defsubr (&Sstring_to_char
);
2719 defsubr (&Schar_to_string
);
2721 defsubr (&Sbuffer_substring
);
2722 defsubr (&Sbuffer_substring_no_properties
);
2723 defsubr (&Sbuffer_string
);
2725 defsubr (&Spoint_marker
);
2726 defsubr (&Smark_marker
);
2728 defsubr (&Sregion_beginning
);
2729 defsubr (&Sregion_end
);
2730 /* defsubr (&Smark); */
2731 /* defsubr (&Sset_mark); */
2732 defsubr (&Ssave_excursion
);
2733 defsubr (&Ssave_current_buffer
);
2735 defsubr (&Sbufsize
);
2736 defsubr (&Spoint_max
);
2737 defsubr (&Spoint_min
);
2738 defsubr (&Spoint_min_marker
);
2739 defsubr (&Spoint_max_marker
);
2741 defsubr (&Sline_beginning_position
);
2742 defsubr (&Sline_end_position
);
2748 defsubr (&Sfollowing_char
);
2749 defsubr (&Sprevious_char
);
2750 defsubr (&Schar_after
);
2751 defsubr (&Schar_before
);
2753 defsubr (&Sinsert_before_markers
);
2754 defsubr (&Sinsert_and_inherit
);
2755 defsubr (&Sinsert_and_inherit_before_markers
);
2756 defsubr (&Sinsert_char
);
2758 defsubr (&Suser_login_name
);
2759 defsubr (&Suser_real_login_name
);
2760 defsubr (&Suser_uid
);
2761 defsubr (&Suser_real_uid
);
2762 defsubr (&Suser_full_name
);
2763 defsubr (&Semacs_pid
);
2764 defsubr (&Scurrent_time
);
2765 defsubr (&Sformat_time_string
);
2766 defsubr (&Sdecode_time
);
2767 defsubr (&Sencode_time
);
2768 defsubr (&Scurrent_time_string
);
2769 defsubr (&Scurrent_time_zone
);
2770 defsubr (&Sset_time_zone_rule
);
2771 defsubr (&Ssystem_name
);
2772 defsubr (&Smessage
);
2773 defsubr (&Smessage_box
);
2774 defsubr (&Smessage_or_box
);
2777 defsubr (&Sinsert_buffer_substring
);
2778 defsubr (&Scompare_buffer_substrings
);
2779 defsubr (&Ssubst_char_in_region
);
2780 defsubr (&Stranslate_region
);
2781 defsubr (&Sdelete_region
);
2783 defsubr (&Snarrow_to_region
);
2784 defsubr (&Ssave_restriction
);
2785 defsubr (&Stranspose_regions
);