1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985,86,87,89,93,94,95,96,97,98, 1999 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. */
23 #include <sys/types.h>
36 #include "intervals.h"
44 #define min(a, b) ((a) < (b) ? (a) : (b))
45 #define max(a, b) ((a) > (b) ? (a) : (b))
51 extern char **environ
;
52 extern Lisp_Object
make_time ();
53 extern void insert_from_buffer ();
54 static int tm_diff ();
55 static void update_buffer_properties ();
56 size_t emacs_strftimeu ();
57 void set_time_zone_rule ();
59 Lisp_Object Vbuffer_access_fontify_functions
;
60 Lisp_Object Qbuffer_access_fontify_functions
;
61 Lisp_Object Vbuffer_access_fontified_property
;
63 Lisp_Object
Fuser_full_name ();
65 /* Some static data, and a function to initialize it for each run */
67 Lisp_Object Vsystem_name
;
68 Lisp_Object Vuser_real_login_name
; /* login name of current user ID */
69 Lisp_Object Vuser_full_name
; /* full name of current user */
70 Lisp_Object Vuser_login_name
; /* user name from LOGNAME or USER */
76 register unsigned char *p
;
77 struct passwd
*pw
; /* password entry for the current user */
80 /* Set up system_name even when dumping. */
84 /* Don't bother with this on initial start when just dumping out */
87 #endif /* not CANNOT_DUMP */
89 pw
= (struct passwd
*) getpwuid (getuid ());
91 /* We let the real user name default to "root" because that's quite
92 accurate on MSDOG and because it lets Emacs find the init file.
93 (The DVX libraries override the Djgpp libraries here.) */
94 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "root");
96 Vuser_real_login_name
= build_string (pw
? pw
->pw_name
: "unknown");
99 /* Get the effective user name, by consulting environment variables,
100 or the effective uid if those are unset. */
101 user_name
= (char *) getenv ("LOGNAME");
104 user_name
= (char *) getenv ("USERNAME"); /* it's USERNAME on NT */
105 #else /* WINDOWSNT */
106 user_name
= (char *) getenv ("USER");
107 #endif /* WINDOWSNT */
110 pw
= (struct passwd
*) getpwuid (geteuid ());
111 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
113 Vuser_login_name
= build_string (user_name
);
115 /* If the user name claimed in the environment vars differs from
116 the real uid, use the claimed name to find the full name. */
117 tem
= Fstring_equal (Vuser_login_name
, Vuser_real_login_name
);
118 Vuser_full_name
= Fuser_full_name (NILP (tem
)? make_number (geteuid())
121 p
= (unsigned char *) getenv ("NAME");
123 Vuser_full_name
= build_string (p
);
124 else if (NILP (Vuser_full_name
))
125 Vuser_full_name
= build_string ("unknown");
128 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
129 "Convert arg CHAR to a string containing that character.")
131 Lisp_Object character
;
134 unsigned char workbuf
[4], *str
;
136 CHECK_NUMBER (character
, 0);
138 len
= CHAR_STRING (XFASTINT (character
), workbuf
, str
);
139 return make_string_from_bytes (str
, 1, len
);
142 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
143 "Convert arg STRING to a character, the first character of that string.\n\
144 A multibyte character is handled correctly.")
146 register Lisp_Object string
;
148 register Lisp_Object val
;
149 register struct Lisp_String
*p
;
150 CHECK_STRING (string
, 0);
151 p
= XSTRING (string
);
154 if (STRING_MULTIBYTE (string
))
155 XSETFASTINT (val
, STRING_CHAR (p
->data
, STRING_BYTES (p
)));
157 XSETFASTINT (val
, p
->data
[0]);
160 XSETFASTINT (val
, 0);
165 buildmark (charpos
, bytepos
)
166 int charpos
, bytepos
;
168 register Lisp_Object mark
;
169 mark
= Fmake_marker ();
170 set_marker_both (mark
, Qnil
, charpos
, bytepos
);
174 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
175 "Return value of point, as an integer.\n\
176 Beginning of buffer is position (point-min)")
180 XSETFASTINT (temp
, PT
);
184 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
185 "Return value of point, as a marker object.")
188 return buildmark (PT
, PT_BYTE
);
192 clip_to_bounds (lower
, num
, upper
)
193 int lower
, num
, upper
;
197 else if (num
> upper
)
203 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
204 "Set point to POSITION, a number or marker.\n\
205 Beginning of buffer is position (point-min), end is (point-max).\n\
206 If the position is in the middle of a multibyte form,\n\
207 the actual point is set at the head of the multibyte form\n\
208 except in the case that `enable-multibyte-characters' is nil.")
210 register Lisp_Object position
;
214 if (MARKERP (position
)
215 && current_buffer
== XMARKER (position
)->buffer
)
217 pos
= marker_position (position
);
219 SET_PT_BOTH (BEGV
, BEGV_BYTE
);
221 SET_PT_BOTH (ZV
, ZV_BYTE
);
223 SET_PT_BOTH (pos
, marker_byte_position (position
));
228 CHECK_NUMBER_COERCE_MARKER (position
, 0);
230 pos
= clip_to_bounds (BEGV
, XINT (position
), ZV
);
236 region_limit (beginningp
)
239 extern Lisp_Object Vmark_even_if_inactive
; /* Defined in callint.c. */
240 register Lisp_Object m
;
241 if (!NILP (Vtransient_mark_mode
) && NILP (Vmark_even_if_inactive
)
242 && NILP (current_buffer
->mark_active
))
243 Fsignal (Qmark_inactive
, Qnil
);
244 m
= Fmarker_position (current_buffer
->mark
);
245 if (NILP (m
)) error ("There is no region now");
246 if ((PT
< XFASTINT (m
)) == beginningp
)
247 return (make_number (PT
));
252 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
253 "Return position of beginning of region, as an integer.")
256 return (region_limit (1));
259 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
260 "Return position of end of region, as an integer.")
263 return (region_limit (0));
266 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
267 "Return this buffer's mark, as a marker object.\n\
268 Watch out! Moving this marker changes the mark position.\n\
269 If you set the marker not to point anywhere, the buffer will have no mark.")
272 return current_buffer
->mark
;
275 /* Returns the position before POS in the current buffer. POS must not
276 be at the beginning of the buffer. */
278 preceding_pos (int pos
)
280 int pos_byte
= CHAR_TO_BYTE (pos
);
282 /* Decrement POS_BYTE (is all this cruft really necessary?). */
283 if (NILP (current_buffer
->enable_multibyte_characters
))
288 return make_number (BYTE_TO_CHAR (pos_byte
));
291 /* Returns true if POS1 and POS2 have the same value for text property PROP. */
293 text_property_eq (prop
, pos1
, pos2
)
295 Lisp_Object pos1
, pos2
;
297 Lisp_Object pval1
, pval2
;
299 pval1
= Fget_text_property (pos1
, prop
, Qnil
);
300 pval2
= Fget_text_property (pos2
, prop
, Qnil
);
302 return EQ (pval1
, pval2
);
305 /* Returns the direction that the text-property PROP would be inherited
306 by any new text inserted at POS: 1 if it would be inherited from POS,
307 -1 if it would be inherited from POS-1, and 0 if from neither. */
309 text_property_stickiness (prop
, pos
)
313 Lisp_Object front_sticky
;
316 /* Consider previous position. */
318 Lisp_Object prev_pos
, rear_non_sticky
;
320 prev_pos
= preceding_pos (pos
);
321 rear_non_sticky
= Fget_text_property (prev_pos
, Qrear_nonsticky
, Qnil
);
323 if (EQ (rear_non_sticky
, Qnil
)
324 || (CONSP (rear_non_sticky
)
325 && !Fmemq (prop
, rear_non_sticky
)))
326 /* PROP is not rear-non-sticky, and since this takes precedence over
327 any front-stickiness, that must be the answer. */
331 /* Consider current position. */
332 front_sticky
= Fget_text_property (pos
, Qfront_sticky
, Qnil
);
334 if (EQ (front_sticky
, Qt
)
335 || (CONSP (front_sticky
)
336 && Fmemq (prop
, front_sticky
)))
337 /* PROP is front-sticky. */
340 /* PROP is not sticky at all. */
344 /* Name for the text property we use to distinguish fields. */
347 /* Returns the field surrounding POS in *BEG and *END; an
348 `field' is a region of text with the same `field' property.
349 If POS is nil, the position of the current buffer's point is used.
350 If MERGE_AT_BOUNDARY is true, then if POS is at the very first
351 position of a field, then the beginning of the previous field
352 is returned instead of the beginning of POS's field (since the end of
353 a field is actually also the beginning of the next input
354 field, this behavior is sometimes useful). BEG or END may be 0, in
355 which case the corresponding value is not returned. */
357 find_field (pos
, merge_at_boundary
, beg
, end
)
359 Lisp_Object merge_at_boundary
;
362 /* If POS is at the edge of a field, then -1 or 1 depending on
363 whether it should be considered as the beginning of the following
364 field, or the end of the previous field, respectively. If POS is
365 not at a field-boundary, then STICKINESS is 0. */
369 XSETFASTINT (pos
, PT
);
371 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
373 if (NILP (merge_at_boundary
) && XFASTINT (pos
) > BEGV
)
374 /* See if we need to handle the case where POS is at beginning of a
375 field, which can also be interpreted as the end of the previous
376 field. We decide which one by seeing which field the `field'
377 property sticks to. The case where if MERGE_AT_BOUNDARY is
378 non-nil (see function comment) is actually the more natural one;
379 then we avoid treating the beginning of a field specially. */
381 /* First see if POS is actually *at* a boundary. */
382 Lisp_Object after_field
, before_field
;
384 after_field
= Fget_text_property (pos
, Qfield
, Qnil
);
385 before_field
= Fget_text_property (preceding_pos (pos
), Qfield
, Qnil
);
387 if (! EQ (after_field
, before_field
))
388 /* We are at a boundary, see which direction is inclusive. */
390 stickiness
= text_property_stickiness (Qfield
, pos
);
393 /* STICKINESS == 0 means that any inserted text will get a
394 `field' text-property of nil, so check to see if that
395 matches either of the adjacent characters (this being a
396 kind of `stickiness by default'). */
398 if (NILP (before_field
))
399 stickiness
= -1; /* Sticks to the left. */
400 else if (NILP (after_field
))
401 stickiness
= 1; /* Sticks to the right. */
409 /* POS is at the edge of a field, and we should consider it as
410 the beginning of the following field. */
411 *beg
= XFASTINT (pos
);
413 /* Find the previous field boundary. */
416 prev
= Fprevious_single_property_change (pos
, Qfield
, Qnil
, Qnil
);
417 *beg
= NILP(prev
) ? BEGV
: XFASTINT (prev
);
424 /* POS is at the edge of a field, and we should consider it as
425 the end of the previous field. */
426 *end
= XFASTINT (pos
);
428 /* Find the next field boundary. */
431 next
= Fnext_single_property_change (pos
, Qfield
, Qnil
, Qnil
);
432 *end
= NILP(next
) ? ZV
: XFASTINT (next
);
437 DEFUN ("delete-field", Fdelete_field
, Sdelete_field
, 0, 1, "d",
438 "Delete the field surrounding POS.\n\
439 A field is a region of text with the same `field' property.\n\
440 If POS is nil, the position of the current buffer's point is used.")
445 find_field (pos
, Qnil
, &beg
, &end
);
447 del_range (beg
, end
);
450 DEFUN ("field-string", Ffield_string
, Sfield_string
, 0, 1, 0,
451 "Return the contents of the field surrounding POS as a string.\n\
452 A field is a region of text with the same `field' property.\n\
453 If POS is nil, the position of the current buffer's point is used.")
458 find_field (pos
, Qnil
, &beg
, &end
);
459 return make_buffer_string (beg
, end
, 1);
462 DEFUN ("field-string-no-properties", Ffield_string_no_properties
, Sfield_string_no_properties
, 0, 1, 0,
463 "Return the contents of the field around POS, without text-properties.\n\
464 A field is a region of text with the same `field' property.\n\
465 If POS is nil, the position of the current buffer's point is used.")
470 find_field (pos
, Qnil
, &beg
, &end
);
471 return make_buffer_string (beg
, end
, 0);
474 DEFUN ("field-beginning", Ffield_beginning
, Sfield_beginning
, 0, 2, 0,
475 "Return the beginning of the field surrounding POS.\n\
476 A field is a region of text with the same `field' property.\n\
477 If POS is nil, the position of the current buffer's point is used.\n\
478 If ESCAPE-FROM-EDGE is non-nil and POS is already at beginning of an\n\
479 field, then the beginning of the *previous* field is returned.")
480 (pos
, escape_from_edge
)
481 Lisp_Object pos
, escape_from_edge
;
484 find_field (pos
, escape_from_edge
, &beg
, 0);
485 return make_number (beg
);
488 DEFUN ("field-end", Ffield_end
, Sfield_end
, 0, 2, 0,
489 "Return the end of the field surrounding POS.\n\
490 A field is a region of text with the same `field' property.\n\
491 If POS is nil, the position of the current buffer's point is used.\n\
492 If ESCAPE-FROM-EDGE is non-nil and POS is already at end of a field,\n\
493 then the end of the *following* field is returned.")
494 (pos
, escape_from_edge
)
495 Lisp_Object pos
, escape_from_edge
;
498 find_field (pos
, escape_from_edge
, 0, &end
);
499 return make_number (end
);
502 DEFUN ("constrain-to-field", Fconstrain_to_field
, Sconstrain_to_field
, 2, 4, 0,
503 "Return the position closest to NEW-POS that is in the same field as OLD-POS.\n\
504 A field is a region of text with the same `field' property.\n\
505 If NEW-POS is nil, then the current point is used instead, and set to the\n\
506 constrained position if that is is different.\n\
508 If OLD-POS is at the boundary of two fields, then the allowable\n\
509 positions for NEW-POS depends on the value of the optional argument\n\
510 ESCAPE-FROM-EDGE: If ESCAPE-FROM-EDGE is nil, then NEW-POS is\n\
511 constrained to the field that has the same `field' text-property\n\
512 as any new characters inserted at OLD-POS, whereas if ESCAPE-FROM-EDGE\n\
513 is non-nil, NEW-POS is constrained to the union of the two adjacent\n\
516 If the optional argument ONLY-IN-LINE is non-nil and constraining\n\
517 NEW-POS would move it to a different line, NEW-POS is returned\n\
518 unconstrained. This useful for commands that move by line, like\n\
519 \\[next-line] or \\[beginning-of-line], which should generally respect field boundaries\n\
520 only in the case where they can still move to the right line.")
521 (new_pos
, old_pos
, escape_from_edge
, only_in_line
)
522 Lisp_Object new_pos
, old_pos
, escape_from_edge
, only_in_line
;
524 /* If non-zero, then the original point, before re-positioning. */
528 /* Use the current point, and afterwards, set it. */
531 XSETFASTINT (new_pos
, PT
);
534 if (!EQ (new_pos
, old_pos
) && !text_property_eq (Qfield
, new_pos
, old_pos
))
535 /* NEW_POS is not within the same field as OLD_POS; try to
536 move NEW_POS so that it is. */
539 Lisp_Object field_bound
;
541 CHECK_NUMBER_COERCE_MARKER (new_pos
, 0);
542 CHECK_NUMBER_COERCE_MARKER (old_pos
, 0);
544 fwd
= (XFASTINT (new_pos
) > XFASTINT (old_pos
));
547 field_bound
= Ffield_end (old_pos
, escape_from_edge
);
549 field_bound
= Ffield_beginning (old_pos
, escape_from_edge
);
551 if (/* If ONLY_IN_LINE is non-nil, we only constrain NEW_POS if doing
552 so would remain within the same line. */
554 /* In that case, see if ESCAPE_FROM_EDGE caused FIELD_BOUND
555 to jump to the other side of NEW_POS, which would mean
556 that NEW_POS is already acceptable, and that we don't
557 have to do the line-check. */
558 || ((XFASTINT (field_bound
) < XFASTINT (new_pos
)) ? !fwd
: fwd
)
559 /* If not, see if there's no newline intervening between
560 NEW_POS and FIELD_BOUND. */
561 || (find_before_next_newline (XFASTINT (new_pos
),
562 XFASTINT (field_bound
),
564 == XFASTINT (field_bound
)))
565 /* Constrain NEW_POS to FIELD_BOUND. */
566 new_pos
= field_bound
;
568 if (orig_point
&& XFASTINT (new_pos
) != orig_point
)
569 /* The NEW_POS argument was originally nil, so automatically set PT. */
570 SET_PT (XFASTINT (new_pos
));
576 DEFUN ("line-beginning-position", Fline_beginning_position
, Sline_beginning_position
,
578 "Return the character position of the first character on the current line.\n\
579 With argument N not nil or 1, move forward N - 1 lines first.\n\
580 If scan reaches end of buffer, return that position.\n\
581 This function does not move point.\n\n\
582 In the minibuffer, if point is not within the prompt,\n\
583 the return value is never within the prompt either.")
588 register int orig
, orig_byte
, end
;
597 Fforward_line (make_number (XINT (n
) - 1));
600 SET_PT_BOTH (orig
, orig_byte
);
602 /* Return END constrained to the current input field. */
603 return Fconstrain_to_field (make_number (end
), make_number (orig
), Qnil
, Qt
);
606 DEFUN ("line-end-position", Fline_end_position
, Sline_end_position
,
608 "Return the character position of the last character on the current line.\n\
609 With argument N not nil or 1, move forward N - 1 lines first.\n\
610 If scan reaches end of buffer, return that position.\n\
611 This function does not move point.")
616 register int orig
= PT
;
623 end_pos
= find_before_next_newline (orig
, 0, XINT (n
) - (XINT (n
) <= 0));
625 /* Return END_POS constrained to the current input field. */
627 Fconstrain_to_field (make_number (end_pos
), make_number (orig
), Qnil
, Qt
);
631 save_excursion_save ()
633 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
636 return Fcons (Fpoint_marker (),
637 Fcons (Fcopy_marker (current_buffer
->mark
, Qnil
),
638 Fcons (visible
? Qt
: Qnil
,
639 current_buffer
->mark_active
)));
643 save_excursion_restore (info
)
646 Lisp_Object tem
, tem1
, omark
, nmark
;
647 struct gcpro gcpro1
, gcpro2
, gcpro3
;
649 tem
= Fmarker_buffer (Fcar (info
));
650 /* If buffer being returned to is now deleted, avoid error */
651 /* Otherwise could get error here while unwinding to top level
653 /* In that case, Fmarker_buffer returns nil now. */
657 omark
= nmark
= Qnil
;
658 GCPRO3 (info
, omark
, nmark
);
663 unchain_marker (tem
);
664 tem
= Fcar (Fcdr (info
));
665 omark
= Fmarker_position (current_buffer
->mark
);
666 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
667 nmark
= Fmarker_position (tem
);
668 unchain_marker (tem
);
669 tem
= Fcdr (Fcdr (info
));
670 #if 0 /* We used to make the current buffer visible in the selected window
671 if that was true previously. That avoids some anomalies.
672 But it creates others, and it wasn't documented, and it is simpler
673 and cleaner never to alter the window/buffer connections. */
676 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
677 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
680 tem1
= current_buffer
->mark_active
;
681 current_buffer
->mark_active
= Fcdr (tem
);
682 if (!NILP (Vrun_hooks
))
684 /* If mark is active now, and either was not active
685 or was at a different place, run the activate hook. */
686 if (! NILP (current_buffer
->mark_active
))
688 if (! EQ (omark
, nmark
))
689 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
691 /* If mark has ceased to be active, run deactivate hook. */
692 else if (! NILP (tem1
))
693 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
699 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
700 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
701 Executes BODY just like `progn'.\n\
702 The values of point, mark and the current buffer are restored\n\
703 even in case of abnormal exit (throw or error).\n\
704 The state of activation of the mark is also restored.\n\
706 This construct does not save `deactivate-mark', and therefore\n\
707 functions that change the buffer will still cause deactivation\n\
708 of the mark at the end of the command. To prevent that, bind\n\
709 `deactivate-mark' with `let'.")
713 register Lisp_Object val
;
714 int count
= specpdl_ptr
- specpdl
;
716 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
719 return unbind_to (count
, val
);
722 DEFUN ("save-current-buffer", Fsave_current_buffer
, Ssave_current_buffer
, 0, UNEVALLED
, 0,
723 "Save the current buffer; execute BODY; restore the current buffer.\n\
724 Executes BODY just like `progn'.")
728 register Lisp_Object val
;
729 int count
= specpdl_ptr
- specpdl
;
731 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
734 return unbind_to (count
, val
);
737 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 1, 0,
738 "Return the number of characters in the current buffer.\n\
739 If BUFFER, return the number of characters in that buffer instead.")
744 return make_number (Z
- BEG
);
747 CHECK_BUFFER (buffer
, 1);
748 return make_number (BUF_Z (XBUFFER (buffer
))
749 - BUF_BEG (XBUFFER (buffer
)));
753 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
754 "Return the minimum permissible value of point in the current buffer.\n\
755 This is 1, unless narrowing (a buffer restriction) is in effect.")
759 XSETFASTINT (temp
, BEGV
);
763 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
764 "Return a marker to the minimum permissible value of point in this buffer.\n\
765 This is the beginning, unless narrowing (a buffer restriction) is in effect.")
768 return buildmark (BEGV
, BEGV_BYTE
);
771 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
772 "Return the maximum permissible value of point in the current buffer.\n\
773 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
774 is in effect, in which case it is less.")
778 XSETFASTINT (temp
, ZV
);
782 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
783 "Return a marker to the maximum permissible value of point in this buffer.\n\
784 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
785 is in effect, in which case it is less.")
788 return buildmark (ZV
, ZV_BYTE
);
791 DEFUN ("gap-position", Fgap_position
, Sgap_position
, 0, 0, 0,
792 "Return the position of the gap, in the current buffer.\n\
793 See also `gap-size'.")
797 XSETFASTINT (temp
, GPT
);
801 DEFUN ("gap-size", Fgap_size
, Sgap_size
, 0, 0, 0,
802 "Return the size of the current buffer's gap.\n\
803 See also `gap-position'.")
807 XSETFASTINT (temp
, GAP_SIZE
);
811 DEFUN ("position-bytes", Fposition_bytes
, Sposition_bytes
, 1, 1, 0,
812 "Return the byte position for character position POSITION.\n\
813 If POSITION is out of range, the value is nil.")
815 Lisp_Object position
;
817 CHECK_NUMBER_COERCE_MARKER (position
, 1);
818 if (XINT (position
) < BEG
|| XINT (position
) > Z
)
820 return make_number (CHAR_TO_BYTE (XINT (position
)));
823 DEFUN ("byte-to-position", Fbyte_to_position
, Sbyte_to_position
, 1, 1, 0,
824 "Return the character position for byte position BYTEPOS.\n\
825 If BYTEPOS is out of range, the value is nil.")
829 CHECK_NUMBER (bytepos
, 1);
830 if (XINT (bytepos
) < BEG_BYTE
|| XINT (bytepos
) > Z_BYTE
)
832 return make_number (BYTE_TO_CHAR (XINT (bytepos
)));
835 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
836 "Return the character following point, as a number.\n\
837 At the end of the buffer or accessible region, return 0.\n\
838 If `enable-multibyte-characters' is nil or point is not\n\
839 at character boundary, multibyte form is ignored,\n\
840 and only one byte following point is returned as a character.")
845 XSETFASTINT (temp
, 0);
847 XSETFASTINT (temp
, FETCH_CHAR (PT_BYTE
));
851 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
852 "Return the character preceding point, as a number.\n\
853 At the beginning of the buffer or accessible region, return 0.\n\
854 If `enable-multibyte-characters' is nil or point is not\n\
855 at character boundary, multi-byte form is ignored,\n\
856 and only one byte preceding point is returned as a character.")
861 XSETFASTINT (temp
, 0);
862 else if (!NILP (current_buffer
->enable_multibyte_characters
))
866 XSETFASTINT (temp
, FETCH_CHAR (pos
));
869 XSETFASTINT (temp
, FETCH_BYTE (PT_BYTE
- 1));
873 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
874 "Return t if point is at the beginning of the buffer.\n\
875 If the buffer is narrowed, this means the beginning of the narrowed part.")
883 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
884 "Return t if point is at the end of the buffer.\n\
885 If the buffer is narrowed, this means the end of the narrowed part.")
893 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
894 "Return t if point is at the beginning of a line.")
897 if (PT
== BEGV
|| FETCH_BYTE (PT_BYTE
- 1) == '\n')
902 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
903 "Return t if point is at the end of a line.\n\
904 `End of a line' includes point being at the end of the buffer.")
907 if (PT
== ZV
|| FETCH_BYTE (PT_BYTE
) == '\n')
912 DEFUN ("char-after", Fchar_after
, Schar_after
, 0, 1, 0,
913 "Return character in current buffer at position POS.\n\
914 POS is an integer or a buffer pointer.\n\
915 If POS is out of range, the value is nil.")
919 register int pos_byte
;
924 XSETFASTINT (pos
, PT
);
929 pos_byte
= marker_byte_position (pos
);
930 if (pos_byte
< BEGV_BYTE
|| pos_byte
>= ZV_BYTE
)
935 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
936 if (XINT (pos
) < BEGV
|| XINT (pos
) >= ZV
)
939 pos_byte
= CHAR_TO_BYTE (XINT (pos
));
942 return make_number (FETCH_CHAR (pos_byte
));
945 DEFUN ("char-before", Fchar_before
, Schar_before
, 0, 1, 0,
946 "Return character in current buffer preceding position POS.\n\
947 POS is an integer or a buffer pointer.\n\
948 If POS is out of range, the value is nil.")
952 register Lisp_Object val
;
953 register int pos_byte
;
958 XSETFASTINT (pos
, PT
);
963 pos_byte
= marker_byte_position (pos
);
965 if (pos_byte
<= BEGV_BYTE
|| pos_byte
> ZV_BYTE
)
970 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
972 if (XINT (pos
) <= BEGV
|| XINT (pos
) > ZV
)
975 pos_byte
= CHAR_TO_BYTE (XINT (pos
));
978 if (!NILP (current_buffer
->enable_multibyte_characters
))
981 XSETFASTINT (val
, FETCH_CHAR (pos_byte
));
986 XSETFASTINT (val
, FETCH_BYTE (pos_byte
));
991 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 1, 0,
992 "Return the name under which the user logged in, as a string.\n\
993 This is based on the effective uid, not the real uid.\n\
994 Also, if the environment variable LOGNAME or USER is set,\n\
995 that determines the value of this function.\n\n\
996 If optional argument UID is an integer, return the login name of the user\n\
997 with that uid, or nil if there is no such user.")
1003 /* Set up the user name info if we didn't do it before.
1004 (That can happen if Emacs is dumpable
1005 but you decide to run `temacs -l loadup' and not dump. */
1006 if (INTEGERP (Vuser_login_name
))
1010 return Vuser_login_name
;
1012 CHECK_NUMBER (uid
, 0);
1013 pw
= (struct passwd
*) getpwuid (XINT (uid
));
1014 return (pw
? build_string (pw
->pw_name
) : Qnil
);
1017 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
1019 "Return the name of the user's real uid, as a string.\n\
1020 This ignores the environment variables LOGNAME and USER, so it differs from\n\
1021 `user-login-name' when running under `su'.")
1024 /* Set up the user name info if we didn't do it before.
1025 (That can happen if Emacs is dumpable
1026 but you decide to run `temacs -l loadup' and not dump. */
1027 if (INTEGERP (Vuser_login_name
))
1029 return Vuser_real_login_name
;
1032 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
1033 "Return the effective uid of Emacs, as an integer.")
1036 return make_number (geteuid ());
1039 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
1040 "Return the real uid of Emacs, as an integer.")
1043 return make_number (getuid ());
1046 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 1, 0,
1047 "Return the full name of the user logged in, as a string.\n\
1048 If the full name corresponding to Emacs's userid is not known,\n\
1049 return \"unknown\".\n\
1051 If optional argument UID is an integer, return the full name of the user\n\
1052 with that uid, or nil if there is no such user.\n\
1053 If UID is a string, return the full name of the user with that login\n\
1054 name, or nil if there is no such user.")
1059 register unsigned char *p
, *q
;
1060 extern char *index ();
1064 return Vuser_full_name
;
1065 else if (NUMBERP (uid
))
1066 pw
= (struct passwd
*) getpwuid (XINT (uid
));
1067 else if (STRINGP (uid
))
1068 pw
= (struct passwd
*) getpwnam (XSTRING (uid
)->data
);
1070 error ("Invalid UID specification");
1075 p
= (unsigned char *) USER_FULL_NAME
;
1076 /* Chop off everything after the first comma. */
1077 q
= (unsigned char *) index (p
, ',');
1078 full
= make_string (p
, q
? q
- p
: strlen (p
));
1080 #ifdef AMPERSAND_FULL_NAME
1081 p
= XSTRING (full
)->data
;
1082 q
= (unsigned char *) index (p
, '&');
1083 /* Substitute the login name for the &, upcasing the first character. */
1086 register unsigned char *r
;
1089 login
= Fuser_login_name (make_number (pw
->pw_uid
));
1090 r
= (unsigned char *) alloca (strlen (p
) + XSTRING (login
)->size
+ 1);
1091 bcopy (p
, r
, q
- p
);
1093 strcat (r
, XSTRING (login
)->data
);
1094 r
[q
- p
] = UPCASE (r
[q
- p
]);
1096 full
= build_string (r
);
1098 #endif /* AMPERSAND_FULL_NAME */
1103 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
1104 "Return the name of the machine you are running on, as a string.")
1107 return Vsystem_name
;
1110 /* For the benefit of callers who don't want to include lisp.h */
1114 if (STRINGP (Vsystem_name
))
1115 return (char *) XSTRING (Vsystem_name
)->data
;
1120 DEFUN ("emacs-pid", Femacs_pid
, Semacs_pid
, 0, 0, 0,
1121 "Return the process ID of Emacs, as an integer.")
1124 return make_number (getpid ());
1127 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
1128 "Return the current time, as the number of seconds since 1970-01-01 00:00:00.\n\
1129 The time is returned as a list of three integers. The first has the\n\
1130 most significant 16 bits of the seconds, while the second has the\n\
1131 least significant 16 bits. The third integer gives the microsecond\n\
1134 The microsecond count is zero on systems that do not provide\n\
1135 resolution finer than a second.")
1139 Lisp_Object result
[3];
1142 XSETINT (result
[0], (EMACS_SECS (t
) >> 16) & 0xffff);
1143 XSETINT (result
[1], (EMACS_SECS (t
) >> 0) & 0xffff);
1144 XSETINT (result
[2], EMACS_USECS (t
));
1146 return Flist (3, result
);
1151 lisp_time_argument (specified_time
, result
)
1152 Lisp_Object specified_time
;
1155 if (NILP (specified_time
))
1156 return time (result
) != -1;
1159 Lisp_Object high
, low
;
1160 high
= Fcar (specified_time
);
1161 CHECK_NUMBER (high
, 0);
1162 low
= Fcdr (specified_time
);
1165 CHECK_NUMBER (low
, 0);
1166 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
1167 return *result
>> 16 == XINT (high
);
1171 /* Write information into buffer S of size MAXSIZE, according to the
1172 FORMAT of length FORMAT_LEN, using time information taken from *TP.
1173 Default to Universal Time if UT is nonzero, local time otherwise.
1174 Return the number of bytes written, not including the terminating
1175 '\0'. If S is NULL, nothing will be written anywhere; so to
1176 determine how many bytes would be written, use NULL for S and
1177 ((size_t) -1) for MAXSIZE.
1179 This function behaves like emacs_strftimeu, except it allows null
1182 emacs_memftimeu (s
, maxsize
, format
, format_len
, tp
, ut
)
1187 const struct tm
*tp
;
1192 /* Loop through all the null-terminated strings in the format
1193 argument. Normally there's just one null-terminated string, but
1194 there can be arbitrarily many, concatenated together, if the
1195 format contains '\0' bytes. emacs_strftimeu stops at the first
1196 '\0' byte so we must invoke it separately for each such string. */
1205 result
= emacs_strftimeu (s
, maxsize
, format
, tp
, ut
);
1209 if (result
== 0 && s
[0] != '\0')
1214 maxsize
-= result
+ 1;
1216 len
= strlen (format
);
1217 if (len
== format_len
)
1221 format_len
-= len
+ 1;
1226 DEFUN ("format-time-string", Fformat_time_string, Sformat_time_string, 1, 3, 0,
1227 "Use FORMAT-STRING to format the time TIME, or now if omitted.\n\
1228 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as returned by\n\
1229 `current-time' or `file-attributes'.\n\
1230 The third, optional, argument UNIVERSAL, if non-nil, means describe TIME\n\
1231 as Universal Time; nil means describe TIME in the local time zone.\n\
1232 The value is a copy of FORMAT-STRING, but with certain constructs replaced\n\
1233 by text that describes the specified date and time in TIME:\n\
1235 %Y is the year, %y within the century, %C the century.\n\
1236 %G is the year corresponding to the ISO week, %g within the century.\n\
1237 %m is the numeric month.\n\
1238 %b and %h are the locale's abbreviated month name, %B the full name.\n\
1239 %d is the day of the month, zero-padded, %e is blank-padded.\n\
1240 %u is the numeric day of week from 1 (Monday) to 7, %w from 0 (Sunday) to 6.\n\
1241 %a is the locale's abbreviated name of the day of week, %A the full name.\n\
1242 %U is the week number starting on Sunday, %W starting on Monday,\n\
1243 %V according to ISO 8601.\n\
1244 %j is the day of the year.\n\
1246 %H is the hour on a 24-hour clock, %I is on a 12-hour clock, %k is like %H\n\
1247 only blank-padded, %l is like %I blank-padded.\n\
1248 %p is the locale's equivalent of either AM or PM.\n\
1249 %M is the minute.\n\
1250 %S is the second.\n\
1251 %Z is the time zone name, %z is the numeric form.\n\
1252 %s is the number of seconds since 1970-01-01 00:00:00 +0000.\n\
1254 %c is the locale's date and time format.\n\
1255 %x is the locale's \"preferred\" date format.\n\
1256 %D is like \"%m/%d/%y\".\n\
1258 %R is like \"%H:%M\", %T is like \"%H:%M:%S\", %r is like \"%I:%M:%S %p\".\n\
1259 %X is the locale's \"preferred\" time format.\n\
1261 Finally, %n is a newline, %t is a tab, %% is a literal %.\n\
1263 Certain flags and modifiers are available with some format controls.\n\
1264 The flags are `_' and `-'. For certain characters X, %_X is like %X,\n\
1265 but padded with blanks; %-X is like %X, but without padding.\n\
1266 %NX (where N stands for an integer) is like %X,\n\
1267 but takes up at least N (a number) positions.\n\
1268 The modifiers are `E' and `O'. For certain characters X,\n\
1269 %EX is a locale's alternative version of %X;\n\
1270 %OX is like %X, but uses the locale's number symbols.\n\
1272 For example, to produce full ISO 8601 format, use \"%Y-%m-%dT%T%z\".")
1273 (format_string, time, universal)
1276 DEFUN ("format-time-string", Fformat_time_string
, Sformat_time_string
, 1, 3, 0,
1277 0 /* See immediately above */)
1278 (format_string
, time
, universal
)
1279 Lisp_Object format_string
, time
, universal
;
1284 int ut
= ! NILP (universal
);
1286 CHECK_STRING (format_string
, 1);
1288 if (! lisp_time_argument (time
, &value
))
1289 error ("Invalid time specification");
1291 format_string
= code_convert_string_norecord (format_string
,
1292 Vlocale_coding_system
, 1);
1294 /* This is probably enough. */
1295 size
= STRING_BYTES (XSTRING (format_string
)) * 6 + 50;
1297 tm
= ut
? gmtime (&value
) : localtime (&value
);
1299 error ("Specified time is not representable");
1301 synchronize_time_locale ();
1305 char *buf
= (char *) alloca (size
+ 1);
1309 result
= emacs_memftimeu (buf
, size
, XSTRING (format_string
)->data
,
1310 STRING_BYTES (XSTRING (format_string
)),
1312 if ((result
> 0 && result
< size
) || (result
== 0 && buf
[0] == '\0'))
1313 return code_convert_string_norecord (make_string (buf
, result
),
1314 Vlocale_coding_system
, 0);
1316 /* If buffer was too small, make it bigger and try again. */
1317 result
= emacs_memftimeu (NULL
, (size_t) -1,
1318 XSTRING (format_string
)->data
,
1319 STRING_BYTES (XSTRING (format_string
)),
1325 DEFUN ("decode-time", Fdecode_time
, Sdecode_time
, 0, 1, 0,
1326 "Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE).\n\
1327 The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED)\n\
1328 or (HIGH . LOW), as from `current-time' and `file-attributes', or `nil'\n\
1329 to use the current time. The list has the following nine members:\n\
1330 SEC is an integer between 0 and 60; SEC is 60 for a leap second, which\n\
1331 only some operating systems support. MINUTE is an integer between 0 and 59.\n\
1332 HOUR is an integer between 0 and 23. DAY is an integer between 1 and 31.\n\
1333 MONTH is an integer between 1 and 12. YEAR is an integer indicating the\n\
1334 four-digit year. DOW is the day of week, an integer between 0 and 6, where\n\
1335 0 is Sunday. DST is t if daylight savings time is effect, otherwise nil.\n\
1336 ZONE is an integer indicating the number of seconds east of Greenwich.\n\
1337 \(Note that Common Lisp has different meanings for DOW and ZONE.)")
1339 Lisp_Object specified_time
;
1343 struct tm
*decoded_time
;
1344 Lisp_Object list_args
[9];
1346 if (! lisp_time_argument (specified_time
, &time_spec
))
1347 error ("Invalid time specification");
1349 decoded_time
= localtime (&time_spec
);
1351 error ("Specified time is not representable");
1352 XSETFASTINT (list_args
[0], decoded_time
->tm_sec
);
1353 XSETFASTINT (list_args
[1], decoded_time
->tm_min
);
1354 XSETFASTINT (list_args
[2], decoded_time
->tm_hour
);
1355 XSETFASTINT (list_args
[3], decoded_time
->tm_mday
);
1356 XSETFASTINT (list_args
[4], decoded_time
->tm_mon
+ 1);
1357 XSETINT (list_args
[5], decoded_time
->tm_year
+ 1900);
1358 XSETFASTINT (list_args
[6], decoded_time
->tm_wday
);
1359 list_args
[7] = (decoded_time
->tm_isdst
)? Qt
: Qnil
;
1361 /* Make a copy, in case gmtime modifies the struct. */
1362 save_tm
= *decoded_time
;
1363 decoded_time
= gmtime (&time_spec
);
1364 if (decoded_time
== 0)
1365 list_args
[8] = Qnil
;
1367 XSETINT (list_args
[8], tm_diff (&save_tm
, decoded_time
));
1368 return Flist (9, list_args
);
1371 DEFUN ("encode-time", Fencode_time
, Sencode_time
, 6, MANY
, 0,
1372 "Convert SECOND, MINUTE, HOUR, DAY, MONTH, YEAR and ZONE to internal time.\n\
1373 This is the reverse operation of `decode-time', which see.\n\
1374 ZONE defaults to the current time zone rule. This can\n\
1375 be a string or t (as from `set-time-zone-rule'), or it can be a list\n\
1376 \(as from `current-time-zone') or an integer (as from `decode-time')\n\
1377 applied without consideration for daylight savings time.\n\
1379 You can pass more than 7 arguments; then the first six arguments\n\
1380 are used as SECOND through YEAR, and the *last* argument is used as ZONE.\n\
1381 The intervening arguments are ignored.\n\
1382 This feature lets (apply 'encode-time (decode-time ...)) work.\n\
1384 Out-of-range values for SEC, MINUTE, HOUR, DAY, or MONTH are allowed;\n\
1385 for example, a DAY of 0 means the day preceding the given month.\n\
1386 Year numbers less than 100 are treated just like other year numbers.\n\
1387 If you want them to stand for years in this century, you must do that yourself.")
1390 register Lisp_Object
*args
;
1394 Lisp_Object zone
= (nargs
> 6 ? args
[nargs
- 1] : Qnil
);
1396 CHECK_NUMBER (args
[0], 0); /* second */
1397 CHECK_NUMBER (args
[1], 1); /* minute */
1398 CHECK_NUMBER (args
[2], 2); /* hour */
1399 CHECK_NUMBER (args
[3], 3); /* day */
1400 CHECK_NUMBER (args
[4], 4); /* month */
1401 CHECK_NUMBER (args
[5], 5); /* year */
1403 tm
.tm_sec
= XINT (args
[0]);
1404 tm
.tm_min
= XINT (args
[1]);
1405 tm
.tm_hour
= XINT (args
[2]);
1406 tm
.tm_mday
= XINT (args
[3]);
1407 tm
.tm_mon
= XINT (args
[4]) - 1;
1408 tm
.tm_year
= XINT (args
[5]) - 1900;
1414 time
= mktime (&tm
);
1419 char **oldenv
= environ
, **newenv
;
1423 else if (STRINGP (zone
))
1424 tzstring
= (char *) XSTRING (zone
)->data
;
1425 else if (INTEGERP (zone
))
1427 int abszone
= abs (XINT (zone
));
1428 sprintf (tzbuf
, "XXX%s%d:%02d:%02d", "-" + (XINT (zone
) < 0),
1429 abszone
/ (60*60), (abszone
/60) % 60, abszone
% 60);
1433 error ("Invalid time zone specification");
1435 /* Set TZ before calling mktime; merely adjusting mktime's returned
1436 value doesn't suffice, since that would mishandle leap seconds. */
1437 set_time_zone_rule (tzstring
);
1439 time
= mktime (&tm
);
1441 /* Restore TZ to previous value. */
1445 #ifdef LOCALTIME_CACHE
1450 if (time
== (time_t) -1)
1451 error ("Specified time is not representable");
1453 return make_time (time
);
1456 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
1457 "Return the current time, as a human-readable string.\n\
1458 Programs can use this function to decode a time,\n\
1459 since the number of columns in each field is fixed.\n\
1460 The format is `Sun Sep 16 01:03:52 1973'.\n\
1461 However, see also the functions `decode-time' and `format-time-string'\n\
1462 which provide a much more powerful and general facility.\n\
1464 If an argument is given, it specifies a time to format\n\
1465 instead of the current time. The argument should have the form:\n\
1468 (HIGH LOW . IGNORED).\n\
1469 Thus, you can use times obtained from `current-time'\n\
1470 and from `file-attributes'.")
1472 Lisp_Object specified_time
;
1478 if (! lisp_time_argument (specified_time
, &value
))
1480 tem
= (char *) ctime (&value
);
1482 strncpy (buf
, tem
, 24);
1485 return build_string (buf
);
1488 #define TM_YEAR_BASE 1900
1490 /* Yield A - B, measured in seconds.
1491 This function is copied from the GNU C Library. */
1496 /* Compute intervening leap days correctly even if year is negative.
1497 Take care to avoid int overflow in leap day calculations,
1498 but it's OK to assume that A and B are close to each other. */
1499 int a4
= (a
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (a
->tm_year
& 3);
1500 int b4
= (b
->tm_year
>> 2) + (TM_YEAR_BASE
>> 2) - ! (b
->tm_year
& 3);
1501 int a100
= a4
/ 25 - (a4
% 25 < 0);
1502 int b100
= b4
/ 25 - (b4
% 25 < 0);
1503 int a400
= a100
>> 2;
1504 int b400
= b100
>> 2;
1505 int intervening_leap_days
= (a4
- b4
) - (a100
- b100
) + (a400
- b400
);
1506 int years
= a
->tm_year
- b
->tm_year
;
1507 int days
= (365 * years
+ intervening_leap_days
1508 + (a
->tm_yday
- b
->tm_yday
));
1509 return (60 * (60 * (24 * days
+ (a
->tm_hour
- b
->tm_hour
))
1510 + (a
->tm_min
- b
->tm_min
))
1511 + (a
->tm_sec
- b
->tm_sec
));
1514 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
1515 "Return the offset and name for the local time zone.\n\
1516 This returns a list of the form (OFFSET NAME).\n\
1517 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
1518 A negative value means west of Greenwich.\n\
1519 NAME is a string giving the name of the time zone.\n\
1520 If an argument is given, it specifies when the time zone offset is determined\n\
1521 instead of using the current time. The argument should have the form:\n\
1524 (HIGH LOW . IGNORED).\n\
1525 Thus, you can use times obtained from `current-time'\n\
1526 and from `file-attributes'.\n\
1528 Some operating systems cannot provide all this information to Emacs;\n\
1529 in this case, `current-time-zone' returns a list containing nil for\n\
1530 the data it can't find.")
1532 Lisp_Object specified_time
;
1538 if (lisp_time_argument (specified_time
, &value
)
1539 && (t
= gmtime (&value
)) != 0
1540 && (gmt
= *t
, t
= localtime (&value
)) != 0)
1542 int offset
= tm_diff (t
, &gmt
);
1547 s
= (char *)t
->tm_zone
;
1548 #else /* not HAVE_TM_ZONE */
1550 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
1551 s
= tzname
[t
->tm_isdst
];
1553 #endif /* not HAVE_TM_ZONE */
1556 /* No local time zone name is available; use "+-NNNN" instead. */
1557 int am
= (offset
< 0 ? -offset
: offset
) / 60;
1558 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
1561 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
1564 return Fmake_list (make_number (2), Qnil
);
1567 /* This holds the value of `environ' produced by the previous
1568 call to Fset_time_zone_rule, or 0 if Fset_time_zone_rule
1569 has never been called. */
1570 static char **environbuf
;
1572 DEFUN ("set-time-zone-rule", Fset_time_zone_rule
, Sset_time_zone_rule
, 1, 1, 0,
1573 "Set the local time zone using TZ, a string specifying a time zone rule.\n\
1574 If TZ is nil, use implementation-defined default time zone information.\n\
1575 If TZ is t, use Universal Time.")
1583 else if (EQ (tz
, Qt
))
1587 CHECK_STRING (tz
, 0);
1588 tzstring
= (char *) XSTRING (tz
)->data
;
1591 set_time_zone_rule (tzstring
);
1594 environbuf
= environ
;
1599 #ifdef LOCALTIME_CACHE
1601 /* These two values are known to load tz files in buggy implementations,
1602 i.e. Solaris 1 executables running under either Solaris 1 or Solaris 2.
1603 Their values shouldn't matter in non-buggy implementations.
1604 We don't use string literals for these strings,
1605 since if a string in the environment is in readonly
1606 storage, it runs afoul of bugs in SVR4 and Solaris 2.3.
1607 See Sun bugs 1113095 and 1114114, ``Timezone routines
1608 improperly modify environment''. */
1610 static char set_time_zone_rule_tz1
[] = "TZ=GMT+0";
1611 static char set_time_zone_rule_tz2
[] = "TZ=GMT+1";
1615 /* Set the local time zone rule to TZSTRING.
1616 This allocates memory into `environ', which it is the caller's
1617 responsibility to free. */
1619 set_time_zone_rule (tzstring
)
1623 char **from
, **to
, **newenv
;
1625 /* Make the ENVIRON vector longer with room for TZSTRING. */
1626 for (from
= environ
; *from
; from
++)
1628 envptrs
= from
- environ
+ 2;
1629 newenv
= to
= (char **) xmalloc (envptrs
* sizeof (char *)
1630 + (tzstring
? strlen (tzstring
) + 4 : 0));
1632 /* Add TZSTRING to the end of environ, as a value for TZ. */
1635 char *t
= (char *) (to
+ envptrs
);
1637 strcat (t
, tzstring
);
1641 /* Copy the old environ vector elements into NEWENV,
1642 but don't copy the TZ variable.
1643 So we have only one definition of TZ, which came from TZSTRING. */
1644 for (from
= environ
; *from
; from
++)
1645 if (strncmp (*from
, "TZ=", 3) != 0)
1651 /* If we do have a TZSTRING, NEWENV points to the vector slot where
1652 the TZ variable is stored. If we do not have a TZSTRING,
1653 TO points to the vector slot which has the terminating null. */
1655 #ifdef LOCALTIME_CACHE
1657 /* In SunOS 4.1.3_U1 and 4.1.4, if TZ has a value like
1658 "US/Pacific" that loads a tz file, then changes to a value like
1659 "XXX0" that does not load a tz file, and then changes back to
1660 its original value, the last change is (incorrectly) ignored.
1661 Also, if TZ changes twice in succession to values that do
1662 not load a tz file, tzset can dump core (see Sun bug#1225179).
1663 The following code works around these bugs. */
1667 /* Temporarily set TZ to a value that loads a tz file
1668 and that differs from tzstring. */
1670 *newenv
= (strcmp (tzstring
, set_time_zone_rule_tz1
+ 3) == 0
1671 ? set_time_zone_rule_tz2
: set_time_zone_rule_tz1
);
1677 /* The implied tzstring is unknown, so temporarily set TZ to
1678 two different values that each load a tz file. */
1679 *to
= set_time_zone_rule_tz1
;
1682 *to
= set_time_zone_rule_tz2
;
1687 /* Now TZ has the desired value, and tzset can be invoked safely. */
1694 /* Insert NARGS Lisp objects in the array ARGS by calling INSERT_FUNC
1695 (if a type of object is Lisp_Int) or INSERT_FROM_STRING_FUNC (if a
1696 type of object is Lisp_String). INHERIT is passed to
1697 INSERT_FROM_STRING_FUNC as the last argument. */
1700 general_insert_function (insert_func
, insert_from_string_func
,
1701 inherit
, nargs
, args
)
1702 void (*insert_func
) P_ ((unsigned char *, int));
1703 void (*insert_from_string_func
) P_ ((Lisp_Object
, int, int, int, int, int));
1705 register Lisp_Object
*args
;
1707 register int argnum
;
1708 register Lisp_Object val
;
1710 for (argnum
= 0; argnum
< nargs
; argnum
++)
1716 unsigned char workbuf
[4], *str
;
1719 if (!NILP (current_buffer
->enable_multibyte_characters
))
1720 len
= CHAR_STRING (XFASTINT (val
), workbuf
, str
);
1723 workbuf
[0] = (SINGLE_BYTE_CHAR_P (XINT (val
))
1725 : multibyte_char_to_unibyte (XINT (val
), Qnil
));
1729 (*insert_func
) (str
, len
);
1731 else if (STRINGP (val
))
1733 (*insert_from_string_func
) (val
, 0, 0,
1734 XSTRING (val
)->size
,
1735 STRING_BYTES (XSTRING (val
)),
1740 val
= wrong_type_argument (Qchar_or_string_p
, val
);
1754 /* Callers passing one argument to Finsert need not gcpro the
1755 argument "array", since the only element of the array will
1756 not be used after calling insert or insert_from_string, so
1757 we don't care if it gets trashed. */
1759 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
1760 "Insert the arguments, either strings or characters, at point.\n\
1761 Point and before-insertion markers move forward to end up\n\
1762 after the inserted text.\n\
1763 Any other markers at the point of insertion remain before the text.\n\
1765 If the current buffer is multibyte, unibyte strings are converted\n\
1766 to multibyte for insertion (see `unibyte-char-to-multibyte').\n\
1767 If the current buffer is unibyte, multibyte strings are converted\n\
1768 to unibyte for insertion.")
1771 register Lisp_Object
*args
;
1773 general_insert_function (insert
, insert_from_string
, 0, nargs
, args
);
1777 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
1779 "Insert the arguments at point, inheriting properties from adjoining text.\n\
1780 Point and before-insertion markers move forward to end up\n\
1781 after the inserted text.\n\
1782 Any other markers at the point of insertion remain before the text.\n\
1784 If the current buffer is multibyte, unibyte strings are converted\n\
1785 to multibyte for insertion (see `unibyte-char-to-multibyte').\n\
1786 If the current buffer is unibyte, multibyte strings are converted\n\
1787 to unibyte for insertion.")
1790 register Lisp_Object
*args
;
1792 general_insert_function (insert_and_inherit
, insert_from_string
, 1,
1797 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
1798 "Insert strings or characters at point, relocating markers after the text.\n\
1799 Point and markers move forward to end up after the inserted text.\n\
1801 If the current buffer is multibyte, unibyte strings are converted\n\
1802 to multibyte for insertion (see `unibyte-char-to-multibyte').\n\
1803 If the current buffer is unibyte, multibyte strings are converted\n\
1804 to unibyte for insertion.")
1807 register Lisp_Object
*args
;
1809 general_insert_function (insert_before_markers
,
1810 insert_from_string_before_markers
, 0,
1815 DEFUN ("insert-before-markers-and-inherit", Finsert_and_inherit_before_markers
,
1816 Sinsert_and_inherit_before_markers
, 0, MANY
, 0,
1817 "Insert text at point, relocating markers and inheriting properties.\n\
1818 Point and markers move forward to end up after the inserted text.\n\
1820 If the current buffer is multibyte, unibyte strings are converted\n\
1821 to multibyte for insertion (see `unibyte-char-to-multibyte').\n\
1822 If the current buffer is unibyte, multibyte strings are converted\n\
1823 to unibyte for insertion.")
1826 register Lisp_Object
*args
;
1828 general_insert_function (insert_before_markers_and_inherit
,
1829 insert_from_string_before_markers
, 1,
1834 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 3, 0,
1835 "Insert COUNT (second arg) copies of CHARACTER (first arg).\n\
1836 Both arguments are required.\n\
1837 Point, and before-insertion markers, are relocated as in the function `insert'.\n\
1838 The optional third arg INHERIT, if non-nil, says to inherit text properties\n\
1839 from adjoining text, if those properties are sticky.")
1840 (character
, count
, inherit
)
1841 Lisp_Object character
, count
, inherit
;
1843 register unsigned char *string
;
1844 register int strlen
;
1847 unsigned char workbuf
[4], *str
;
1849 CHECK_NUMBER (character
, 0);
1850 CHECK_NUMBER (count
, 1);
1852 if (!NILP (current_buffer
->enable_multibyte_characters
))
1853 len
= CHAR_STRING (XFASTINT (character
), workbuf
, str
);
1855 workbuf
[0] = XFASTINT (character
), str
= workbuf
, len
= 1;
1856 n
= XINT (count
) * len
;
1859 strlen
= min (n
, 256 * len
);
1860 string
= (unsigned char *) alloca (strlen
);
1861 for (i
= 0; i
< strlen
; i
++)
1862 string
[i
] = str
[i
% len
];
1866 if (!NILP (inherit
))
1867 insert_and_inherit (string
, strlen
);
1869 insert (string
, strlen
);
1874 if (!NILP (inherit
))
1875 insert_and_inherit (string
, n
);
1883 /* Making strings from buffer contents. */
1885 /* Return a Lisp_String containing the text of the current buffer from
1886 START to END. If text properties are in use and the current buffer
1887 has properties in the range specified, the resulting string will also
1888 have them, if PROPS is nonzero.
1890 We don't want to use plain old make_string here, because it calls
1891 make_uninit_string, which can cause the buffer arena to be
1892 compacted. make_string has no way of knowing that the data has
1893 been moved, and thus copies the wrong data into the string. This
1894 doesn't effect most of the other users of make_string, so it should
1895 be left as is. But we should use this function when conjuring
1896 buffer substrings. */
1899 make_buffer_string (start
, end
, props
)
1903 int start_byte
= CHAR_TO_BYTE (start
);
1904 int end_byte
= CHAR_TO_BYTE (end
);
1906 return make_buffer_string_both (start
, start_byte
, end
, end_byte
, props
);
1909 /* Return a Lisp_String containing the text of the current buffer from
1910 START / START_BYTE to END / END_BYTE.
1912 If text properties are in use and the current buffer
1913 has properties in the range specified, the resulting string will also
1914 have them, if PROPS is nonzero.
1916 We don't want to use plain old make_string here, because it calls
1917 make_uninit_string, which can cause the buffer arena to be
1918 compacted. make_string has no way of knowing that the data has
1919 been moved, and thus copies the wrong data into the string. This
1920 doesn't effect most of the other users of make_string, so it should
1921 be left as is. But we should use this function when conjuring
1922 buffer substrings. */
1925 make_buffer_string_both (start
, start_byte
, end
, end_byte
, props
)
1926 int start
, start_byte
, end
, end_byte
;
1929 Lisp_Object result
, tem
, tem1
;
1931 if (start
< GPT
&& GPT
< end
)
1934 if (! NILP (current_buffer
->enable_multibyte_characters
))
1935 result
= make_uninit_multibyte_string (end
- start
, end_byte
- start_byte
);
1937 result
= make_uninit_string (end
- start
);
1938 bcopy (BYTE_POS_ADDR (start_byte
), XSTRING (result
)->data
,
1939 end_byte
- start_byte
);
1941 /* If desired, update and copy the text properties. */
1944 update_buffer_properties (start
, end
);
1946 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
1947 tem1
= Ftext_properties_at (make_number (start
), Qnil
);
1949 if (XINT (tem
) != end
|| !NILP (tem1
))
1950 copy_intervals_to_string (result
, current_buffer
, start
,
1957 /* Call Vbuffer_access_fontify_functions for the range START ... END
1958 in the current buffer, if necessary. */
1961 update_buffer_properties (start
, end
)
1964 /* If this buffer has some access functions,
1965 call them, specifying the range of the buffer being accessed. */
1966 if (!NILP (Vbuffer_access_fontify_functions
))
1968 Lisp_Object args
[3];
1971 args
[0] = Qbuffer_access_fontify_functions
;
1972 XSETINT (args
[1], start
);
1973 XSETINT (args
[2], end
);
1975 /* But don't call them if we can tell that the work
1976 has already been done. */
1977 if (!NILP (Vbuffer_access_fontified_property
))
1979 tem
= Ftext_property_any (args
[1], args
[2],
1980 Vbuffer_access_fontified_property
,
1983 Frun_hook_with_args (3, args
);
1986 Frun_hook_with_args (3, args
);
1990 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
1991 "Return the contents of part of the current buffer as a string.\n\
1992 The two arguments START and END are character positions;\n\
1993 they can be in either order.\n\
1994 The string returned is multibyte if the buffer is multibyte.")
1996 Lisp_Object start
, end
;
2000 validate_region (&start
, &end
);
2004 return make_buffer_string (b
, e
, 1);
2007 DEFUN ("buffer-substring-no-properties", Fbuffer_substring_no_properties
,
2008 Sbuffer_substring_no_properties
, 2, 2, 0,
2009 "Return the characters of part of the buffer, without the text properties.\n\
2010 The two arguments START and END are character positions;\n\
2011 they can be in either order.")
2013 Lisp_Object start
, end
;
2017 validate_region (&start
, &end
);
2021 return make_buffer_string (b
, e
, 0);
2024 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
2025 "Return the contents of the current buffer as a string.\n\
2026 If narrowing is in effect, this function returns only the visible part\n\
2027 of the buffer. If in a mini-buffer, don't include the prompt in the\n\
2031 return make_buffer_string (BEGV
, ZV
, 1);
2034 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
2036 "Insert before point a substring of the contents of buffer BUFFER.\n\
2037 BUFFER may be a buffer or a buffer name.\n\
2038 Arguments START and END are character numbers specifying the substring.\n\
2039 They default to the beginning and the end of BUFFER.")
2041 Lisp_Object buf
, start
, end
;
2043 register int b
, e
, temp
;
2044 register struct buffer
*bp
, *obuf
;
2047 buffer
= Fget_buffer (buf
);
2050 bp
= XBUFFER (buffer
);
2051 if (NILP (bp
->name
))
2052 error ("Selecting deleted buffer");
2058 CHECK_NUMBER_COERCE_MARKER (start
, 0);
2065 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2070 temp
= b
, b
= e
, e
= temp
;
2072 if (!(BUF_BEGV (bp
) <= b
&& e
<= BUF_ZV (bp
)))
2073 args_out_of_range (start
, end
);
2075 obuf
= current_buffer
;
2076 set_buffer_internal_1 (bp
);
2077 update_buffer_properties (b
, e
);
2078 set_buffer_internal_1 (obuf
);
2080 insert_from_buffer (bp
, b
, e
- b
, 0);
2084 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
2086 "Compare two substrings of two buffers; return result as number.\n\
2087 the value is -N if first string is less after N-1 chars,\n\
2088 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
2089 Each substring is represented as three arguments: BUFFER, START and END.\n\
2090 That makes six args in all, three for each substring.\n\n\
2091 The value of `case-fold-search' in the current buffer\n\
2092 determines whether case is significant or ignored.")
2093 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
2094 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
2096 register int begp1
, endp1
, begp2
, endp2
, temp
;
2097 register struct buffer
*bp1
, *bp2
;
2098 register Lisp_Object
*trt
2099 = (!NILP (current_buffer
->case_fold_search
)
2100 ? XCHAR_TABLE (current_buffer
->case_canon_table
)->contents
: 0);
2102 int i1
, i2
, i1_byte
, i2_byte
;
2104 /* Find the first buffer and its substring. */
2107 bp1
= current_buffer
;
2111 buf1
= Fget_buffer (buffer1
);
2114 bp1
= XBUFFER (buf1
);
2115 if (NILP (bp1
->name
))
2116 error ("Selecting deleted buffer");
2120 begp1
= BUF_BEGV (bp1
);
2123 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
2124 begp1
= XINT (start1
);
2127 endp1
= BUF_ZV (bp1
);
2130 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
2131 endp1
= XINT (end1
);
2135 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
2137 if (!(BUF_BEGV (bp1
) <= begp1
2139 && endp1
<= BUF_ZV (bp1
)))
2140 args_out_of_range (start1
, end1
);
2142 /* Likewise for second substring. */
2145 bp2
= current_buffer
;
2149 buf2
= Fget_buffer (buffer2
);
2152 bp2
= XBUFFER (buf2
);
2153 if (NILP (bp2
->name
))
2154 error ("Selecting deleted buffer");
2158 begp2
= BUF_BEGV (bp2
);
2161 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
2162 begp2
= XINT (start2
);
2165 endp2
= BUF_ZV (bp2
);
2168 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
2169 endp2
= XINT (end2
);
2173 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
2175 if (!(BUF_BEGV (bp2
) <= begp2
2177 && endp2
<= BUF_ZV (bp2
)))
2178 args_out_of_range (start2
, end2
);
2182 i1_byte
= buf_charpos_to_bytepos (bp1
, i1
);
2183 i2_byte
= buf_charpos_to_bytepos (bp2
, i2
);
2185 while (i1
< endp1
&& i2
< endp2
)
2187 /* When we find a mismatch, we must compare the
2188 characters, not just the bytes. */
2191 if (! NILP (bp1
->enable_multibyte_characters
))
2193 c1
= BUF_FETCH_MULTIBYTE_CHAR (bp1
, i1_byte
);
2194 BUF_INC_POS (bp1
, i1_byte
);
2199 c1
= BUF_FETCH_BYTE (bp1
, i1
);
2200 c1
= unibyte_char_to_multibyte (c1
);
2204 if (! NILP (bp2
->enable_multibyte_characters
))
2206 c2
= BUF_FETCH_MULTIBYTE_CHAR (bp2
, i2_byte
);
2207 BUF_INC_POS (bp2
, i2_byte
);
2212 c2
= BUF_FETCH_BYTE (bp2
, i2
);
2213 c2
= unibyte_char_to_multibyte (c2
);
2219 c1
= XINT (trt
[c1
]);
2220 c2
= XINT (trt
[c2
]);
2223 return make_number (- 1 - chars
);
2225 return make_number (chars
+ 1);
2230 /* The strings match as far as they go.
2231 If one is shorter, that one is less. */
2232 if (chars
< endp1
- begp1
)
2233 return make_number (chars
+ 1);
2234 else if (chars
< endp2
- begp2
)
2235 return make_number (- chars
- 1);
2237 /* Same length too => they are equal. */
2238 return make_number (0);
2242 subst_char_in_region_unwind (arg
)
2245 return current_buffer
->undo_list
= arg
;
2249 subst_char_in_region_unwind_1 (arg
)
2252 return current_buffer
->filename
= arg
;
2255 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
2256 Ssubst_char_in_region
, 4, 5, 0,
2257 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
2258 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
2259 and don't mark the buffer as really changed.\n\
2260 Both characters must have the same length of multi-byte form.")
2261 (start
, end
, fromchar
, tochar
, noundo
)
2262 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
2264 register int pos
, pos_byte
, stop
, i
, len
, end_byte
;
2266 unsigned char fromwork
[4], *fromstr
, towork
[4], *tostr
, *p
;
2267 int count
= specpdl_ptr
- specpdl
;
2268 #define COMBINING_NO 0
2269 #define COMBINING_BEFORE 1
2270 #define COMBINING_AFTER 2
2271 #define COMBINING_BOTH (COMBINING_BEFORE | COMBINING_AFTER)
2272 int maybe_byte_combining
= COMBINING_NO
;
2274 validate_region (&start
, &end
);
2275 CHECK_NUMBER (fromchar
, 2);
2276 CHECK_NUMBER (tochar
, 3);
2278 if (! NILP (current_buffer
->enable_multibyte_characters
))
2280 len
= CHAR_STRING (XFASTINT (fromchar
), fromwork
, fromstr
);
2281 if (CHAR_STRING (XFASTINT (tochar
), towork
, tostr
) != len
)
2282 error ("Characters in subst-char-in-region have different byte-lengths");
2283 if (!ASCII_BYTE_P (*tostr
))
2285 /* If *TOSTR is in the range 0x80..0x9F and TOCHAR is not a
2286 complete multibyte character, it may be combined with the
2287 after bytes. If it is in the range 0xA0..0xFF, it may be
2288 combined with the before and after bytes. */
2289 if (!CHAR_HEAD_P (*tostr
))
2290 maybe_byte_combining
= COMBINING_BOTH
;
2291 else if (BYTES_BY_CHAR_HEAD (*tostr
) > len
)
2292 maybe_byte_combining
= COMBINING_AFTER
;
2298 fromwork
[0] = XFASTINT (fromchar
), fromstr
= fromwork
;
2299 towork
[0] = XFASTINT (tochar
), tostr
= towork
;
2303 pos_byte
= CHAR_TO_BYTE (pos
);
2304 stop
= CHAR_TO_BYTE (XINT (end
));
2307 /* If we don't want undo, turn off putting stuff on the list.
2308 That's faster than getting rid of things,
2309 and it prevents even the entry for a first change.
2310 Also inhibit locking the file. */
2313 record_unwind_protect (subst_char_in_region_unwind
,
2314 current_buffer
->undo_list
);
2315 current_buffer
->undo_list
= Qt
;
2316 /* Don't do file-locking. */
2317 record_unwind_protect (subst_char_in_region_unwind_1
,
2318 current_buffer
->filename
);
2319 current_buffer
->filename
= Qnil
;
2322 if (pos_byte
< GPT_BYTE
)
2323 stop
= min (stop
, GPT_BYTE
);
2326 int pos_byte_next
= pos_byte
;
2328 if (pos_byte
>= stop
)
2330 if (pos_byte
>= end_byte
) break;
2333 p
= BYTE_POS_ADDR (pos_byte
);
2334 INC_POS (pos_byte_next
);
2335 if (pos_byte_next
- pos_byte
== len
2336 && p
[0] == fromstr
[0]
2338 || (p
[1] == fromstr
[1]
2339 && (len
== 2 || (p
[2] == fromstr
[2]
2340 && (len
== 3 || p
[3] == fromstr
[3]))))))
2344 modify_region (current_buffer
, XINT (start
), XINT (end
));
2346 if (! NILP (noundo
))
2348 if (MODIFF
- 1 == SAVE_MODIFF
)
2350 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
2351 current_buffer
->auto_save_modified
++;
2357 /* Take care of the case where the new character
2358 combines with neighboring bytes. */
2359 if (maybe_byte_combining
2360 && (maybe_byte_combining
== COMBINING_AFTER
2361 ? (pos_byte_next
< Z_BYTE
2362 && ! CHAR_HEAD_P (FETCH_BYTE (pos_byte_next
)))
2363 : ((pos_byte_next
< Z_BYTE
2364 && ! CHAR_HEAD_P (FETCH_BYTE (pos_byte_next
)))
2365 || (pos_byte
> BEG_BYTE
2366 && ! ASCII_BYTE_P (FETCH_BYTE (pos_byte
- 1))))))
2368 Lisp_Object tem
, string
;
2370 struct gcpro gcpro1
;
2372 tem
= current_buffer
->undo_list
;
2375 /* Make a multibyte string containing this single character. */
2376 string
= make_multibyte_string (tostr
, 1, len
);
2377 /* replace_range is less efficient, because it moves the gap,
2378 but it handles combining correctly. */
2379 replace_range (pos
, pos
+ 1, string
,
2381 pos_byte_next
= CHAR_TO_BYTE (pos
);
2382 if (pos_byte_next
> pos_byte
)
2383 /* Before combining happened. We should not increment
2384 POS. So, to cancel the later increment of POS,
2388 INC_POS (pos_byte_next
);
2390 if (! NILP (noundo
))
2391 current_buffer
->undo_list
= tem
;
2398 record_change (pos
, 1);
2399 for (i
= 0; i
< len
; i
++) *p
++ = tostr
[i
];
2402 pos_byte
= pos_byte_next
;
2407 signal_after_change (XINT (start
),
2408 XINT (end
) - XINT (start
), XINT (end
) - XINT (start
));
2410 unbind_to (count
, Qnil
);
2414 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
2415 "From START to END, translate characters according to TABLE.\n\
2416 TABLE is a string; the Nth character in it is the mapping\n\
2417 for the character with code N.\n\
2418 This function does not alter multibyte characters.\n\
2419 It returns the number of characters changed.")
2423 register Lisp_Object table
;
2425 register int pos_byte
, stop
; /* Limits of the region. */
2426 register unsigned char *tt
; /* Trans table. */
2427 register int nc
; /* New character. */
2428 int cnt
; /* Number of changes made. */
2429 int size
; /* Size of translate table. */
2432 validate_region (&start
, &end
);
2433 CHECK_STRING (table
, 2);
2435 size
= STRING_BYTES (XSTRING (table
));
2436 tt
= XSTRING (table
)->data
;
2438 pos_byte
= CHAR_TO_BYTE (XINT (start
));
2439 stop
= CHAR_TO_BYTE (XINT (end
));
2440 modify_region (current_buffer
, XINT (start
), XINT (end
));
2444 for (; pos_byte
< stop
; )
2446 register unsigned char *p
= BYTE_POS_ADDR (pos_byte
);
2451 oc
= STRING_CHAR_AND_LENGTH (p
, stop
- pos_byte
, len
);
2452 pos_byte_next
= pos_byte
+ len
;
2453 if (oc
< size
&& len
== 1)
2458 /* Take care of the case where the new character
2459 combines with neighboring bytes. */
2460 if (!ASCII_BYTE_P (nc
)
2461 && (CHAR_HEAD_P (nc
)
2462 ? ! CHAR_HEAD_P (FETCH_BYTE (pos_byte
+ 1))
2463 : (pos_byte
> BEG_BYTE
2464 && ! ASCII_BYTE_P (FETCH_BYTE (pos_byte
- 1)))))
2468 string
= make_multibyte_string (tt
+ oc
, 1, 1);
2469 /* This is less efficient, because it moves the gap,
2470 but it handles combining correctly. */
2471 replace_range (pos
, pos
+ 1, string
,
2473 pos_byte_next
= CHAR_TO_BYTE (pos
);
2474 if (pos_byte_next
> pos_byte
)
2475 /* Before combining happened. We should not
2476 increment POS. So, to cancel the later
2477 increment of POS, we decrease it now. */
2480 INC_POS (pos_byte_next
);
2484 record_change (pos
, 1);
2486 signal_after_change (pos
, 1, 1);
2491 pos_byte
= pos_byte_next
;
2495 return make_number (cnt
);
2498 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
2499 "Delete the text between point and mark.\n\
2500 When called from a program, expects two arguments,\n\
2501 positions (integers or markers) specifying the stretch to be deleted.")
2503 Lisp_Object start
, end
;
2505 validate_region (&start
, &end
);
2506 del_range (XINT (start
), XINT (end
));
2510 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
2511 "Remove restrictions (narrowing) from current buffer.\n\
2512 This allows the buffer's full text to be seen and edited.")
2515 if (BEG
!= BEGV
|| Z
!= ZV
)
2516 current_buffer
->clip_changed
= 1;
2518 BEGV_BYTE
= BEG_BYTE
;
2519 SET_BUF_ZV_BOTH (current_buffer
, Z
, Z_BYTE
);
2520 /* Changing the buffer bounds invalidates any recorded current column. */
2521 invalidate_current_column ();
2525 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
2526 "Restrict editing in this buffer to the current region.\n\
2527 The rest of the text becomes temporarily invisible and untouchable\n\
2528 but is not deleted; if you save the buffer in a file, the invisible\n\
2529 text is included in the file. \\[widen] makes all visible again.\n\
2530 See also `save-restriction'.\n\
2532 When calling from a program, pass two arguments; positions (integers\n\
2533 or markers) bounding the text that should remain visible.")
2535 register Lisp_Object start
, end
;
2537 CHECK_NUMBER_COERCE_MARKER (start
, 0);
2538 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2540 if (XINT (start
) > XINT (end
))
2543 tem
= start
; start
= end
; end
= tem
;
2546 if (!(BEG
<= XINT (start
) && XINT (start
) <= XINT (end
) && XINT (end
) <= Z
))
2547 args_out_of_range (start
, end
);
2549 if (BEGV
!= XFASTINT (start
) || ZV
!= XFASTINT (end
))
2550 current_buffer
->clip_changed
= 1;
2552 SET_BUF_BEGV (current_buffer
, XFASTINT (start
));
2553 SET_BUF_ZV (current_buffer
, XFASTINT (end
));
2554 if (PT
< XFASTINT (start
))
2555 SET_PT (XFASTINT (start
));
2556 if (PT
> XFASTINT (end
))
2557 SET_PT (XFASTINT (end
));
2558 /* Changing the buffer bounds invalidates any recorded current column. */
2559 invalidate_current_column ();
2564 save_restriction_save ()
2566 register Lisp_Object bottom
, top
;
2567 /* Note: I tried using markers here, but it does not win
2568 because insertion at the end of the saved region
2569 does not advance mh and is considered "outside" the saved region. */
2570 XSETFASTINT (bottom
, BEGV
- BEG
);
2571 XSETFASTINT (top
, Z
- ZV
);
2573 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
2577 save_restriction_restore (data
)
2580 register struct buffer
*buf
;
2581 register int newhead
, newtail
;
2582 register Lisp_Object tem
;
2585 buf
= XBUFFER (XCAR (data
));
2590 newhead
= XINT (tem
);
2592 newtail
= XINT (tem
);
2593 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
2599 obegv
= BUF_BEGV (buf
);
2602 SET_BUF_BEGV (buf
, BUF_BEG (buf
) + newhead
);
2603 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
2605 if (obegv
!= BUF_BEGV (buf
) || ozv
!= BUF_ZV (buf
))
2606 current_buffer
->clip_changed
= 1;
2608 /* If point is outside the new visible range, move it inside. */
2609 SET_BUF_PT_BOTH (buf
,
2610 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)),
2611 clip_to_bounds (BUF_BEGV_BYTE (buf
), BUF_PT_BYTE (buf
),
2612 BUF_ZV_BYTE (buf
)));
2617 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
2618 "Execute BODY, saving and restoring current buffer's restrictions.\n\
2619 The buffer's restrictions make parts of the beginning and end invisible.\n\
2620 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
2621 This special form, `save-restriction', saves the current buffer's restrictions\n\
2622 when it is entered, and restores them when it is exited.\n\
2623 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
2624 The old restrictions settings are restored\n\
2625 even in case of abnormal exit (throw or error).\n\
2627 The value returned is the value of the last form in BODY.\n\
2629 `save-restriction' can get confused if, within the BODY, you widen\n\
2630 and then make changes outside the area within the saved restrictions.\n\
2631 See Info node `(elisp)Narrowing' for details and an appropriate technique.\n\
2633 Note: if you are using both `save-excursion' and `save-restriction',\n\
2634 use `save-excursion' outermost:\n\
2635 (save-excursion (save-restriction ...))")
2639 register Lisp_Object val
;
2640 int count
= specpdl_ptr
- specpdl
;
2642 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
2643 val
= Fprogn (body
);
2644 return unbind_to (count
, val
);
2649 /* Buffer for the most recent text displayed by Fmessage. */
2650 static char *message_text
;
2652 /* Allocated length of that buffer. */
2653 static int message_length
;
2655 #endif /* not HAVE_MENUS */
2657 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
2658 "Print a one-line message at the bottom of the screen.\n\
2659 The first argument is a format control string, and the rest are data\n\
2660 to be formatted under control of the string. See `format' for details.\n\
2662 If the first argument is nil, clear any existing message; let the\n\
2663 minibuffer contents show.")
2675 register Lisp_Object val
;
2676 val
= Fformat (nargs
, args
);
2677 message3 (val
, STRING_BYTES (XSTRING (val
)), STRING_MULTIBYTE (val
));
2682 DEFUN ("message-box", Fmessage_box
, Smessage_box
, 1, MANY
, 0,
2683 "Display a message, in a dialog box if possible.\n\
2684 If a dialog box is not available, use the echo area.\n\
2685 The first argument is a format control string, and the rest are data\n\
2686 to be formatted under control of the string. See `format' for details.\n\
2688 If the first argument is nil, clear any existing message; let the\n\
2689 minibuffer contents show.")
2701 register Lisp_Object val
;
2702 val
= Fformat (nargs
, args
);
2705 Lisp_Object pane
, menu
, obj
;
2706 struct gcpro gcpro1
;
2707 pane
= Fcons (Fcons (build_string ("OK"), Qt
), Qnil
);
2709 menu
= Fcons (val
, pane
);
2710 obj
= Fx_popup_dialog (Qt
, menu
);
2714 #else /* not HAVE_MENUS */
2715 /* Copy the data so that it won't move when we GC. */
2718 message_text
= (char *)xmalloc (80);
2719 message_length
= 80;
2721 if (STRING_BYTES (XSTRING (val
)) > message_length
)
2723 message_length
= STRING_BYTES (XSTRING (val
));
2724 message_text
= (char *)xrealloc (message_text
, message_length
);
2726 bcopy (XSTRING (val
)->data
, message_text
, STRING_BYTES (XSTRING (val
)));
2727 message2 (message_text
, STRING_BYTES (XSTRING (val
)),
2728 STRING_MULTIBYTE (val
));
2730 #endif /* not HAVE_MENUS */
2734 extern Lisp_Object last_nonmenu_event
;
2737 DEFUN ("message-or-box", Fmessage_or_box
, Smessage_or_box
, 1, MANY
, 0,
2738 "Display a message in a dialog box or in the echo area.\n\
2739 If this command was invoked with the mouse, use a dialog box.\n\
2740 Otherwise, use the echo area.\n\
2741 The first argument is a format control string, and the rest are data\n\
2742 to be formatted under control of the string. See `format' for details.\n\
2744 If the first argument is nil, clear any existing message; let the\n\
2745 minibuffer contents show.")
2751 if (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
2752 return Fmessage_box (nargs
, args
);
2754 return Fmessage (nargs
, args
);
2757 DEFUN ("current-message", Fcurrent_message
, Scurrent_message
, 0, 0, 0,
2758 "Return the string currently displayed in the echo area, or nil if none.")
2761 return current_message ();
2765 DEFUN ("propertize", Fpropertize
, Spropertize
, 3, MANY
, 0,
2766 "Return a copy of STRING with text properties added.\n\
2767 First argument is the string to copy.\n\
2768 Remaining arguments are sequences of PROPERTY VALUE pairs for text\n\
2769 properties to add to the result ")
2774 Lisp_Object properties
, string
;
2775 struct gcpro gcpro1
, gcpro2
;
2778 /* Number of args must be odd. */
2779 if ((nargs
& 1) == 0 || nargs
< 3)
2780 error ("Wrong number of arguments");
2782 properties
= string
= Qnil
;
2783 GCPRO2 (properties
, string
);
2785 /* First argument must be a string. */
2786 CHECK_STRING (args
[0], 0);
2787 string
= Fcopy_sequence (args
[0]);
2789 for (i
= 1; i
< nargs
; i
+= 2)
2791 CHECK_SYMBOL (args
[i
], i
);
2792 properties
= Fcons (args
[i
], Fcons (args
[i
+ 1], properties
));
2795 Fadd_text_properties (make_number (0),
2796 make_number (XSTRING (string
)->size
),
2797 properties
, string
);
2798 RETURN_UNGCPRO (string
);
2802 /* Number of bytes that STRING will occupy when put into the result.
2803 MULTIBYTE is nonzero if the result should be multibyte. */
2805 #define CONVERTED_BYTE_SIZE(MULTIBYTE, STRING) \
2806 (((MULTIBYTE) && ! STRING_MULTIBYTE (STRING)) \
2807 ? count_size_as_multibyte (XSTRING (STRING)->data, \
2808 STRING_BYTES (XSTRING (STRING))) \
2809 : STRING_BYTES (XSTRING (STRING)))
2811 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
2812 "Format a string out of a control-string and arguments.\n\
2813 The first argument is a control string.\n\
2814 The other arguments are substituted into it to make the result, a string.\n\
2815 It may contain %-sequences meaning to substitute the next argument.\n\
2816 %s means print a string argument. Actually, prints any object, with `princ'.\n\
2817 %d means print as number in decimal (%o octal, %x hex).\n\
2818 %e means print a number in exponential notation.\n\
2819 %f means print a number in decimal-point notation.\n\
2820 %g means print a number in exponential notation\n\
2821 or decimal-point notation, whichever uses fewer characters.\n\
2822 %c means print a number as a single character.\n\
2823 %S means print any object as an s-expression (using `prin1').\n\
2824 The argument used for %d, %o, %x, %e, %f, %g or %c must be a number.\n\
2825 Use %% to put a single % into the output.")
2828 register Lisp_Object
*args
;
2830 register int n
; /* The number of the next arg to substitute */
2831 register int total
; /* An estimate of the final length */
2833 register unsigned char *format
, *end
;
2835 /* Nonzero if the output should be a multibyte string,
2836 which is true if any of the inputs is one. */
2838 /* When we make a multibyte string, we must pay attention to the
2839 byte combining problem, i.e., a byte may be combined with a
2840 multibyte charcter of the previous string. This flag tells if we
2841 must consider such a situation or not. */
2842 int maybe_combine_byte
;
2843 unsigned char *this_format
;
2851 extern char *index ();
2853 /* It should not be necessary to GCPRO ARGS, because
2854 the caller in the interpreter should take care of that. */
2856 /* Try to determine whether the result should be multibyte.
2857 This is not always right; sometimes the result needs to be multibyte
2858 because of an object that we will pass through prin1,
2859 and in that case, we won't know it here. */
2860 for (n
= 0; n
< nargs
; n
++)
2861 if (STRINGP (args
[n
]) && STRING_MULTIBYTE (args
[n
]))
2864 CHECK_STRING (args
[0], 0);
2866 /* If we start out planning a unibyte result,
2867 and later find it has to be multibyte, we jump back to retry. */
2870 format
= XSTRING (args
[0])->data
;
2871 end
= format
+ STRING_BYTES (XSTRING (args
[0]));
2874 /* Make room in result for all the non-%-codes in the control string. */
2875 total
= 5 + CONVERTED_BYTE_SIZE (multibyte
, args
[0]);
2877 /* Add to TOTAL enough space to hold the converted arguments. */
2880 while (format
!= end
)
2881 if (*format
++ == '%')
2883 int minlen
, thissize
= 0;
2884 unsigned char *this_format_start
= format
- 1;
2886 /* Process a numeric arg and skip it. */
2887 minlen
= atoi (format
);
2891 while ((*format
>= '0' && *format
<= '9')
2892 || *format
== '-' || *format
== ' ' || *format
== '.')
2895 if (format
- this_format_start
+ 1 > longest_format
)
2896 longest_format
= format
- this_format_start
+ 1;
2899 error ("Format string ends in middle of format specifier");
2902 else if (++n
>= nargs
)
2903 error ("Not enough arguments for format string");
2904 else if (*format
== 'S')
2906 /* For `S', prin1 the argument and then treat like a string. */
2907 register Lisp_Object tem
;
2908 tem
= Fprin1_to_string (args
[n
], Qnil
);
2909 if (STRING_MULTIBYTE (tem
) && ! multibyte
)
2917 else if (SYMBOLP (args
[n
]))
2919 XSETSTRING (args
[n
], XSYMBOL (args
[n
])->name
);
2920 if (STRING_MULTIBYTE (args
[n
]) && ! multibyte
)
2927 else if (STRINGP (args
[n
]))
2930 if (*format
!= 's' && *format
!= 'S')
2931 error ("Format specifier doesn't match argument type");
2932 thissize
= CONVERTED_BYTE_SIZE (multibyte
, args
[n
]);
2934 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
2935 else if (INTEGERP (args
[n
]) && *format
!= 's')
2937 #ifdef LISP_FLOAT_TYPE
2938 /* The following loop assumes the Lisp type indicates
2939 the proper way to pass the argument.
2940 So make sure we have a flonum if the argument should
2942 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
2943 args
[n
] = Ffloat (args
[n
]);
2946 if (*format
!= 'd' && *format
!= 'o' && *format
!= 'x'
2947 && *format
!= 'i' && *format
!= 'X' && *format
!= 'c')
2948 error ("Invalid format operation %%%c", *format
);
2952 && (! SINGLE_BYTE_CHAR_P (XINT (args
[n
]))
2953 || XINT (args
[n
]) == 0))
2960 args
[n
] = Fchar_to_string (args
[n
]);
2961 thissize
= STRING_BYTES (XSTRING (args
[n
]));
2964 #ifdef LISP_FLOAT_TYPE
2965 else if (FLOATP (args
[n
]) && *format
!= 's')
2967 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
2968 args
[n
] = Ftruncate (args
[n
], Qnil
);
2974 /* Anything but a string, convert to a string using princ. */
2975 register Lisp_Object tem
;
2976 tem
= Fprin1_to_string (args
[n
], Qt
);
2977 if (STRING_MULTIBYTE (tem
) & ! multibyte
)
2986 if (thissize
< minlen
)
2989 total
+= thissize
+ 4;
2992 /* Now we can no longer jump to retry.
2993 TOTAL and LONGEST_FORMAT are known for certain. */
2995 this_format
= (unsigned char *) alloca (longest_format
+ 1);
2997 /* Allocate the space for the result.
2998 Note that TOTAL is an overestimate. */
3000 buf
= (char *) alloca (total
+ 1);
3002 buf
= (char *) xmalloc (total
+ 1);
3008 /* Scan the format and store result in BUF. */
3009 format
= XSTRING (args
[0])->data
;
3010 maybe_combine_byte
= 0;
3011 while (format
!= end
)
3017 unsigned char *this_format_start
= format
;
3021 /* Process a numeric arg and skip it. */
3022 minlen
= atoi (format
);
3024 minlen
= - minlen
, negative
= 1;
3026 while ((*format
>= '0' && *format
<= '9')
3027 || *format
== '-' || *format
== ' ' || *format
== '.')
3030 if (*format
++ == '%')
3039 if (STRINGP (args
[n
]))
3041 int padding
, nbytes
;
3042 int width
= strwidth (XSTRING (args
[n
])->data
,
3043 STRING_BYTES (XSTRING (args
[n
])));
3046 /* If spec requires it, pad on right with spaces. */
3047 padding
= minlen
- width
;
3049 while (padding
-- > 0)
3057 && !ASCII_BYTE_P (*((unsigned char *) p
- 1))
3058 && STRING_MULTIBYTE (args
[n
])
3059 && !CHAR_HEAD_P (XSTRING (args
[n
])->data
[0]))
3060 maybe_combine_byte
= 1;
3061 nbytes
= copy_text (XSTRING (args
[n
])->data
, p
,
3062 STRING_BYTES (XSTRING (args
[n
])),
3063 STRING_MULTIBYTE (args
[n
]), multibyte
);
3065 nchars
+= XSTRING (args
[n
])->size
;
3068 while (padding
-- > 0)
3074 /* If this argument has text properties, record where
3075 in the result string it appears. */
3076 if (XSTRING (args
[n
])->intervals
)
3080 int nbytes
= nargs
* sizeof *info
;
3081 info
= (struct info
*) alloca (nbytes
);
3082 bzero (info
, nbytes
);
3085 info
[n
].start
= start
;
3086 info
[n
].end
= nchars
;
3089 else if (INTEGERP (args
[n
]) || FLOATP (args
[n
]))
3093 bcopy (this_format_start
, this_format
,
3094 format
- this_format_start
);
3095 this_format
[format
- this_format_start
] = 0;
3097 if (INTEGERP (args
[n
]))
3098 sprintf (p
, this_format
, XINT (args
[n
]));
3100 sprintf (p
, this_format
, XFLOAT_DATA (args
[n
]));
3104 && !ASCII_BYTE_P (*((unsigned char *) p
- 1))
3105 && !CHAR_HEAD_P (*((unsigned char *) p
)))
3106 maybe_combine_byte
= 1;
3107 this_nchars
= strlen (p
);
3109 nchars
+= this_nchars
;
3112 else if (STRING_MULTIBYTE (args
[0]))
3114 /* Copy a whole multibyte character. */
3117 && !ASCII_BYTE_P (*((unsigned char *) p
- 1))
3118 && !CHAR_HEAD_P (*format
))
3119 maybe_combine_byte
= 1;
3121 while (! CHAR_HEAD_P (*format
)) *p
++ = *format
++;
3126 /* Convert a single-byte character to multibyte. */
3127 int len
= copy_text (format
, p
, 1, 0, 1);
3134 *p
++ = *format
++, nchars
++;
3137 if (maybe_combine_byte
)
3138 nchars
= multibyte_chars_in_text (buf
, p
- buf
);
3139 val
= make_specified_string (buf
, nchars
, p
- buf
, multibyte
);
3141 /* If we allocated BUF with malloc, free it too. */
3145 /* If the format string has text properties, or any of the string
3146 arguments has text properties, set up text properties of the
3149 if (XSTRING (args
[0])->intervals
|| info
)
3151 Lisp_Object len
, new_len
, props
;
3152 struct gcpro gcpro1
;
3154 /* Add text properties from the format string. */
3155 len
= make_number (XSTRING (args
[0])->size
);
3156 props
= text_property_list (args
[0], make_number (0), len
, Qnil
);
3161 new_len
= make_number (XSTRING (val
)->size
);
3162 extend_property_ranges (props
, len
, new_len
);
3163 add_text_properties_from_list (val
, props
, make_number (0));
3166 /* Add text properties from arguments. */
3168 for (n
= 1; n
< nargs
; ++n
)
3171 len
= make_number (XSTRING (args
[n
])->size
);
3172 new_len
= make_number (info
[n
].end
- info
[n
].start
);
3173 props
= text_property_list (args
[n
], make_number (0), len
, Qnil
);
3174 extend_property_ranges (props
, len
, new_len
);
3175 add_text_properties_from_list (val
, props
,
3176 make_number (info
[n
].start
));
3189 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
3190 EMACS_INT arg0
, arg1
, arg2
, arg3
, arg4
;
3204 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, (char **) args
);
3206 doprnt (buf
, sizeof buf
, string1
, (char *)0, 5, &string1
+ 1);
3208 return build_string (buf
);
3211 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
3212 "Return t if two characters match, optionally ignoring case.\n\
3213 Both arguments must be characters (i.e. integers).\n\
3214 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
3216 register Lisp_Object c1
, c2
;
3219 CHECK_NUMBER (c1
, 0);
3220 CHECK_NUMBER (c2
, 1);
3222 if (XINT (c1
) == XINT (c2
))
3224 if (NILP (current_buffer
->case_fold_search
))
3227 /* Do these in separate statements,
3228 then compare the variables.
3229 because of the way DOWNCASE uses temp variables. */
3230 i1
= DOWNCASE (XFASTINT (c1
));
3231 i2
= DOWNCASE (XFASTINT (c2
));
3232 return (i1
== i2
? Qt
: Qnil
);
3235 /* Transpose the markers in two regions of the current buffer, and
3236 adjust the ones between them if necessary (i.e.: if the regions
3239 START1, END1 are the character positions of the first region.
3240 START1_BYTE, END1_BYTE are the byte positions.
3241 START2, END2 are the character positions of the second region.
3242 START2_BYTE, END2_BYTE are the byte positions.
3244 Traverses the entire marker list of the buffer to do so, adding an
3245 appropriate amount to some, subtracting from some, and leaving the
3246 rest untouched. Most of this is copied from adjust_markers in insdel.c.
3248 It's the caller's job to ensure that START1 <= END1 <= START2 <= END2. */
3251 transpose_markers (start1
, end1
, start2
, end2
,
3252 start1_byte
, end1_byte
, start2_byte
, end2_byte
)
3253 register int start1
, end1
, start2
, end2
;
3254 register int start1_byte
, end1_byte
, start2_byte
, end2_byte
;
3256 register int amt1
, amt1_byte
, amt2
, amt2_byte
, diff
, diff_byte
, mpos
;
3257 register Lisp_Object marker
;
3259 /* Update point as if it were a marker. */
3263 TEMP_SET_PT_BOTH (PT
+ (end2
- end1
),
3264 PT_BYTE
+ (end2_byte
- end1_byte
));
3265 else if (PT
< start2
)
3266 TEMP_SET_PT_BOTH (PT
+ (end2
- start2
) - (end1
- start1
),
3267 (PT_BYTE
+ (end2_byte
- start2_byte
)
3268 - (end1_byte
- start1_byte
)));
3270 TEMP_SET_PT_BOTH (PT
- (start2
- start1
),
3271 PT_BYTE
- (start2_byte
- start1_byte
));
3273 /* We used to adjust the endpoints here to account for the gap, but that
3274 isn't good enough. Even if we assume the caller has tried to move the
3275 gap out of our way, it might still be at start1 exactly, for example;
3276 and that places it `inside' the interval, for our purposes. The amount
3277 of adjustment is nontrivial if there's a `denormalized' marker whose
3278 position is between GPT and GPT + GAP_SIZE, so it's simpler to leave
3279 the dirty work to Fmarker_position, below. */
3281 /* The difference between the region's lengths */
3282 diff
= (end2
- start2
) - (end1
- start1
);
3283 diff_byte
= (end2_byte
- start2_byte
) - (end1_byte
- start1_byte
);
3285 /* For shifting each marker in a region by the length of the other
3286 region plus the distance between the regions. */
3287 amt1
= (end2
- start2
) + (start2
- end1
);
3288 amt2
= (end1
- start1
) + (start2
- end1
);
3289 amt1_byte
= (end2_byte
- start2_byte
) + (start2_byte
- end1_byte
);
3290 amt2_byte
= (end1_byte
- start1_byte
) + (start2_byte
- end1_byte
);
3292 for (marker
= BUF_MARKERS (current_buffer
); !NILP (marker
);
3293 marker
= XMARKER (marker
)->chain
)
3295 mpos
= marker_byte_position (marker
);
3296 if (mpos
>= start1_byte
&& mpos
< end2_byte
)
3298 if (mpos
< end1_byte
)
3300 else if (mpos
< start2_byte
)
3304 XMARKER (marker
)->bytepos
= mpos
;
3306 mpos
= XMARKER (marker
)->charpos
;
3307 if (mpos
>= start1
&& mpos
< end2
)
3311 else if (mpos
< start2
)
3316 XMARKER (marker
)->charpos
= mpos
;
3320 DEFUN ("transpose-regions", Ftranspose_regions
, Stranspose_regions
, 4, 5, 0,
3321 "Transpose region START1 to END1 with START2 to END2.\n\
3322 The regions may not be overlapping, because the size of the buffer is\n\
3323 never changed in a transposition.\n\
3325 Optional fifth arg LEAVE_MARKERS, if non-nil, means don't update\n\
3326 any markers that happen to be located in the regions.\n\
3328 Transposing beyond buffer boundaries is an error.")
3329 (startr1
, endr1
, startr2
, endr2
, leave_markers
)
3330 Lisp_Object startr1
, endr1
, startr2
, endr2
, leave_markers
;
3332 register int start1
, end1
, start2
, end2
;
3333 int start1_byte
, start2_byte
, len1_byte
, len2_byte
;
3334 int gap
, len1
, len_mid
, len2
;
3335 unsigned char *start1_addr
, *start2_addr
, *temp
;
3336 int combined_before_bytes_1
, combined_after_bytes_1
;
3337 int combined_before_bytes_2
, combined_after_bytes_2
;
3338 struct gcpro gcpro1
, gcpro2
;
3340 INTERVAL cur_intv
, tmp_interval1
, tmp_interval_mid
, tmp_interval2
;
3341 cur_intv
= BUF_INTERVALS (current_buffer
);
3343 validate_region (&startr1
, &endr1
);
3344 validate_region (&startr2
, &endr2
);
3346 start1
= XFASTINT (startr1
);
3347 end1
= XFASTINT (endr1
);
3348 start2
= XFASTINT (startr2
);
3349 end2
= XFASTINT (endr2
);
3352 /* Swap the regions if they're reversed. */
3355 register int glumph
= start1
;
3363 len1
= end1
- start1
;
3364 len2
= end2
- start2
;
3367 error ("Transposed regions overlap");
3368 else if (start1
== end1
|| start2
== end2
)
3369 error ("Transposed region has length 0");
3371 /* The possibilities are:
3372 1. Adjacent (contiguous) regions, or separate but equal regions
3373 (no, really equal, in this case!), or
3374 2. Separate regions of unequal size.
3376 The worst case is usually No. 2. It means that (aside from
3377 potential need for getting the gap out of the way), there also
3378 needs to be a shifting of the text between the two regions. So
3379 if they are spread far apart, we are that much slower... sigh. */
3381 /* It must be pointed out that the really studly thing to do would
3382 be not to move the gap at all, but to leave it in place and work
3383 around it if necessary. This would be extremely efficient,
3384 especially considering that people are likely to do
3385 transpositions near where they are working interactively, which
3386 is exactly where the gap would be found. However, such code
3387 would be much harder to write and to read. So, if you are
3388 reading this comment and are feeling squirrely, by all means have
3389 a go! I just didn't feel like doing it, so I will simply move
3390 the gap the minimum distance to get it out of the way, and then
3391 deal with an unbroken array. */
3393 /* Make sure the gap won't interfere, by moving it out of the text
3394 we will operate on. */
3395 if (start1
< gap
&& gap
< end2
)
3397 if (gap
- start1
< end2
- gap
)
3403 start1_byte
= CHAR_TO_BYTE (start1
);
3404 start2_byte
= CHAR_TO_BYTE (start2
);
3405 len1_byte
= CHAR_TO_BYTE (end1
) - start1_byte
;
3406 len2_byte
= CHAR_TO_BYTE (end2
) - start2_byte
;
3410 combined_before_bytes_2
3411 = count_combining_before (BYTE_POS_ADDR (start2_byte
),
3412 len2_byte
, start1
, start1_byte
);
3413 combined_before_bytes_1
3414 = count_combining_before (BYTE_POS_ADDR (start1_byte
),
3415 len1_byte
, end2
, start2_byte
+ len2_byte
);
3416 combined_after_bytes_1
3417 = count_combining_after (BYTE_POS_ADDR (start1_byte
),
3418 len1_byte
, end2
, start2_byte
+ len2_byte
);
3419 combined_after_bytes_2
= 0;
3423 combined_before_bytes_2
3424 = count_combining_before (BYTE_POS_ADDR (start2_byte
),
3425 len2_byte
, start1
, start1_byte
);
3426 combined_before_bytes_1
3427 = count_combining_before (BYTE_POS_ADDR (start1_byte
),
3428 len1_byte
, start2
, start2_byte
);
3429 combined_after_bytes_2
3430 = count_combining_after (BYTE_POS_ADDR (start2_byte
),
3431 len2_byte
, end1
, start1_byte
+ len1_byte
);
3432 combined_after_bytes_1
3433 = count_combining_after (BYTE_POS_ADDR (start1_byte
),
3434 len1_byte
, end2
, start2_byte
+ len2_byte
);
3437 /* If any combining is going to happen, do this the stupid way,
3438 because replace handles combining properly. */
3439 if (combined_before_bytes_1
|| combined_before_bytes_2
3440 || combined_after_bytes_1
|| combined_after_bytes_2
)
3442 Lisp_Object text1
, text2
;
3444 text1
= text2
= Qnil
;
3445 GCPRO2 (text1
, text2
);
3447 text1
= make_buffer_string_both (start1
, start1_byte
,
3448 end1
, start1_byte
+ len1_byte
, 1);
3449 text2
= make_buffer_string_both (start2
, start2_byte
,
3450 end2
, start2_byte
+ len2_byte
, 1);
3452 transpose_markers (start1
, end1
, start2
, end2
,
3453 start1_byte
, start1_byte
+ len1_byte
,
3454 start2_byte
, start2_byte
+ len2_byte
);
3456 replace_range (start2
, end2
, text1
, 1, 0, 0);
3457 replace_range (start1
, end1
, text2
, 1, 0, 0);
3463 /* Hmmm... how about checking to see if the gap is large
3464 enough to use as the temporary storage? That would avoid an
3465 allocation... interesting. Later, don't fool with it now. */
3467 /* Working without memmove, for portability (sigh), so must be
3468 careful of overlapping subsections of the array... */
3470 if (end1
== start2
) /* adjacent regions */
3472 modify_region (current_buffer
, start1
, end2
);
3473 record_change (start1
, len1
+ len2
);
3475 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
3476 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
3477 Fset_text_properties (make_number (start1
), make_number (end2
),
3480 /* First region smaller than second. */
3481 if (len1_byte
< len2_byte
)
3483 /* We use alloca only if it is small,
3484 because we want to avoid stack overflow. */
3485 if (len2_byte
> 20000)
3486 temp
= (unsigned char *) xmalloc (len2_byte
);
3488 temp
= (unsigned char *) alloca (len2_byte
);
3490 /* Don't precompute these addresses. We have to compute them
3491 at the last minute, because the relocating allocator might
3492 have moved the buffer around during the xmalloc. */
3493 start1_addr
= BYTE_POS_ADDR (start1_byte
);
3494 start2_addr
= BYTE_POS_ADDR (start2_byte
);
3496 bcopy (start2_addr
, temp
, len2_byte
);
3497 bcopy (start1_addr
, start1_addr
+ len2_byte
, len1_byte
);
3498 bcopy (temp
, start1_addr
, len2_byte
);
3499 if (len2_byte
> 20000)
3503 /* First region not smaller than second. */
3505 if (len1_byte
> 20000)
3506 temp
= (unsigned char *) xmalloc (len1_byte
);
3508 temp
= (unsigned char *) alloca (len1_byte
);
3509 start1_addr
= BYTE_POS_ADDR (start1_byte
);
3510 start2_addr
= BYTE_POS_ADDR (start2_byte
);
3511 bcopy (start1_addr
, temp
, len1_byte
);
3512 bcopy (start2_addr
, start1_addr
, len2_byte
);
3513 bcopy (temp
, start1_addr
+ len2_byte
, len1_byte
);
3514 if (len1_byte
> 20000)
3517 graft_intervals_into_buffer (tmp_interval1
, start1
+ len2
,
3518 len1
, current_buffer
, 0);
3519 graft_intervals_into_buffer (tmp_interval2
, start1
,
3520 len2
, current_buffer
, 0);
3522 /* Non-adjacent regions, because end1 != start2, bleagh... */
3525 len_mid
= start2_byte
- (start1_byte
+ len1_byte
);
3527 if (len1_byte
== len2_byte
)
3528 /* Regions are same size, though, how nice. */
3530 modify_region (current_buffer
, start1
, end1
);
3531 modify_region (current_buffer
, start2
, end2
);
3532 record_change (start1
, len1
);
3533 record_change (start2
, len2
);
3534 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
3535 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
3536 Fset_text_properties (make_number (start1
), make_number (end1
),
3538 Fset_text_properties (make_number (start2
), make_number (end2
),
3541 if (len1_byte
> 20000)
3542 temp
= (unsigned char *) xmalloc (len1_byte
);
3544 temp
= (unsigned char *) alloca (len1_byte
);
3545 start1_addr
= BYTE_POS_ADDR (start1_byte
);
3546 start2_addr
= BYTE_POS_ADDR (start2_byte
);
3547 bcopy (start1_addr
, temp
, len1_byte
);
3548 bcopy (start2_addr
, start1_addr
, len2_byte
);
3549 bcopy (temp
, start2_addr
, len1_byte
);
3550 if (len1_byte
> 20000)
3552 graft_intervals_into_buffer (tmp_interval1
, start2
,
3553 len1
, current_buffer
, 0);
3554 graft_intervals_into_buffer (tmp_interval2
, start1
,
3555 len2
, current_buffer
, 0);
3558 else if (len1_byte
< len2_byte
) /* Second region larger than first */
3559 /* Non-adjacent & unequal size, area between must also be shifted. */
3561 modify_region (current_buffer
, start1
, end2
);
3562 record_change (start1
, (end2
- start1
));
3563 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
3564 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
3565 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
3566 Fset_text_properties (make_number (start1
), make_number (end2
),
3569 /* holds region 2 */
3570 if (len2_byte
> 20000)
3571 temp
= (unsigned char *) xmalloc (len2_byte
);
3573 temp
= (unsigned char *) alloca (len2_byte
);
3574 start1_addr
= BYTE_POS_ADDR (start1_byte
);
3575 start2_addr
= BYTE_POS_ADDR (start2_byte
);
3576 bcopy (start2_addr
, temp
, len2_byte
);
3577 bcopy (start1_addr
, start1_addr
+ len_mid
+ len2_byte
, len1_byte
);
3578 safe_bcopy (start1_addr
+ len1_byte
, start1_addr
+ len2_byte
, len_mid
);
3579 bcopy (temp
, start1_addr
, len2_byte
);
3580 if (len2_byte
> 20000)
3582 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
3583 len1
, current_buffer
, 0);
3584 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
3585 len_mid
, current_buffer
, 0);
3586 graft_intervals_into_buffer (tmp_interval2
, start1
,
3587 len2
, current_buffer
, 0);
3590 /* Second region smaller than first. */
3592 record_change (start1
, (end2
- start1
));
3593 modify_region (current_buffer
, start1
, end2
);
3595 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
3596 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
3597 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
3598 Fset_text_properties (make_number (start1
), make_number (end2
),
3601 /* holds region 1 */
3602 if (len1_byte
> 20000)
3603 temp
= (unsigned char *) xmalloc (len1_byte
);
3605 temp
= (unsigned char *) alloca (len1_byte
);
3606 start1_addr
= BYTE_POS_ADDR (start1_byte
);
3607 start2_addr
= BYTE_POS_ADDR (start2_byte
);
3608 bcopy (start1_addr
, temp
, len1_byte
);
3609 bcopy (start2_addr
, start1_addr
, len2_byte
);
3610 bcopy (start1_addr
+ len1_byte
, start1_addr
+ len2_byte
, len_mid
);
3611 bcopy (temp
, start1_addr
+ len2_byte
+ len_mid
, len1_byte
);
3612 if (len1_byte
> 20000)
3614 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
3615 len1
, current_buffer
, 0);
3616 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
3617 len_mid
, current_buffer
, 0);
3618 graft_intervals_into_buffer (tmp_interval2
, start1
,
3619 len2
, current_buffer
, 0);
3623 /* When doing multiple transpositions, it might be nice
3624 to optimize this. Perhaps the markers in any one buffer
3625 should be organized in some sorted data tree. */
3626 if (NILP (leave_markers
))
3628 transpose_markers (start1
, end1
, start2
, end2
,
3629 start1_byte
, start1_byte
+ len1_byte
,
3630 start2_byte
, start2_byte
+ len2_byte
);
3631 fix_overlays_in_range (start1
, end2
);
3643 Qbuffer_access_fontify_functions
3644 = intern ("buffer-access-fontify-functions");
3645 staticpro (&Qbuffer_access_fontify_functions
);
3647 DEFVAR_LISP ("buffer-access-fontify-functions",
3648 &Vbuffer_access_fontify_functions
,
3649 "List of functions called by `buffer-substring' to fontify if necessary.\n\
3650 Each function is called with two arguments which specify the range\n\
3651 of the buffer being accessed.");
3652 Vbuffer_access_fontify_functions
= Qnil
;
3656 extern Lisp_Object Vprin1_to_string_buffer
;
3657 obuf
= Fcurrent_buffer ();
3658 /* Do this here, because init_buffer_once is too early--it won't work. */
3659 Fset_buffer (Vprin1_to_string_buffer
);
3660 /* Make sure buffer-access-fontify-functions is nil in this buffer. */
3661 Fset (Fmake_local_variable (intern ("buffer-access-fontify-functions")),
3666 DEFVAR_LISP ("buffer-access-fontified-property",
3667 &Vbuffer_access_fontified_property
,
3668 "Property which (if non-nil) indicates text has been fontified.\n\
3669 `buffer-substring' need not call the `buffer-access-fontify-functions'\n\
3670 functions if all the text being accessed has this property.");
3671 Vbuffer_access_fontified_property
= Qnil
;
3673 DEFVAR_LISP ("system-name", &Vsystem_name
,
3674 "The name of the machine Emacs is running on.");
3676 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
3677 "The full name of the user logged in.");
3679 DEFVAR_LISP ("user-login-name", &Vuser_login_name
,
3680 "The user's name, taken from environment variables if possible.");
3682 DEFVAR_LISP ("user-real-login-name", &Vuser_real_login_name
,
3683 "The user's name, based upon the real uid only.");
3685 defsubr (&Spropertize
);
3686 defsubr (&Schar_equal
);
3687 defsubr (&Sgoto_char
);
3688 defsubr (&Sstring_to_char
);
3689 defsubr (&Schar_to_string
);
3690 defsubr (&Sbuffer_substring
);
3691 defsubr (&Sbuffer_substring_no_properties
);
3692 defsubr (&Sbuffer_string
);
3694 defsubr (&Spoint_marker
);
3695 defsubr (&Smark_marker
);
3697 defsubr (&Sregion_beginning
);
3698 defsubr (&Sregion_end
);
3700 staticpro (&Qfield
);
3701 Qfield
= intern ("field");
3702 defsubr (&Sfield_beginning
);
3703 defsubr (&Sfield_end
);
3704 defsubr (&Sfield_string
);
3705 defsubr (&Sfield_string_no_properties
);
3706 defsubr (&Sdelete_field
);
3707 defsubr (&Sconstrain_to_field
);
3709 defsubr (&Sline_beginning_position
);
3710 defsubr (&Sline_end_position
);
3712 /* defsubr (&Smark); */
3713 /* defsubr (&Sset_mark); */
3714 defsubr (&Ssave_excursion
);
3715 defsubr (&Ssave_current_buffer
);
3717 defsubr (&Sbufsize
);
3718 defsubr (&Spoint_max
);
3719 defsubr (&Spoint_min
);
3720 defsubr (&Spoint_min_marker
);
3721 defsubr (&Spoint_max_marker
);
3722 defsubr (&Sgap_position
);
3723 defsubr (&Sgap_size
);
3724 defsubr (&Sposition_bytes
);
3725 defsubr (&Sbyte_to_position
);
3731 defsubr (&Sfollowing_char
);
3732 defsubr (&Sprevious_char
);
3733 defsubr (&Schar_after
);
3734 defsubr (&Schar_before
);
3736 defsubr (&Sinsert_before_markers
);
3737 defsubr (&Sinsert_and_inherit
);
3738 defsubr (&Sinsert_and_inherit_before_markers
);
3739 defsubr (&Sinsert_char
);
3741 defsubr (&Suser_login_name
);
3742 defsubr (&Suser_real_login_name
);
3743 defsubr (&Suser_uid
);
3744 defsubr (&Suser_real_uid
);
3745 defsubr (&Suser_full_name
);
3746 defsubr (&Semacs_pid
);
3747 defsubr (&Scurrent_time
);
3748 defsubr (&Sformat_time_string
);
3749 defsubr (&Sdecode_time
);
3750 defsubr (&Sencode_time
);
3751 defsubr (&Scurrent_time_string
);
3752 defsubr (&Scurrent_time_zone
);
3753 defsubr (&Sset_time_zone_rule
);
3754 defsubr (&Ssystem_name
);
3755 defsubr (&Smessage
);
3756 defsubr (&Smessage_box
);
3757 defsubr (&Smessage_or_box
);
3758 defsubr (&Scurrent_message
);
3761 defsubr (&Sinsert_buffer_substring
);
3762 defsubr (&Scompare_buffer_substrings
);
3763 defsubr (&Ssubst_char_in_region
);
3764 defsubr (&Stranslate_region
);
3765 defsubr (&Sdelete_region
);
3767 defsubr (&Snarrow_to_region
);
3768 defsubr (&Ssave_restriction
);
3769 defsubr (&Stranspose_regions
);