1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985, 1986, 1987, 1989, 1992 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
30 #include "intervals.h"
36 #define min(a, b) ((a) < (b) ? (a) : (b))
37 #define max(a, b) ((a) > (b) ? (a) : (b))
39 /* Some static data, and a function to initialize it for each run */
41 Lisp_Object Vsystem_name
;
42 Lisp_Object Vuser_real_name
; /* login name of current user ID */
43 Lisp_Object Vuser_full_name
; /* full name of current user */
44 Lisp_Object Vuser_name
; /* user name from USER or LOGNAME. */
50 register unsigned char *p
, *q
, *r
;
51 struct passwd
*pw
; /* password entry for the current user */
52 extern char *index ();
55 /* Set up system_name even when dumping. */
57 Vsystem_name
= build_string (get_system_name ());
58 p
= XSTRING (Vsystem_name
)->data
;
61 if (*p
== ' ' || *p
== '\t')
67 /* Don't bother with this on initial start when just dumping out */
70 #endif /* not CANNOT_DUMP */
72 pw
= (struct passwd
*) getpwuid (getuid ());
73 Vuser_real_name
= build_string (pw
? pw
->pw_name
: "unknown");
75 /* Get the effective user name, by consulting environment variables,
76 or the effective uid if those are unset. */
77 user_name
= (char *) getenv ("USER");
79 user_name
= (char *) getenv ("LOGNAME");
82 pw
= (struct passwd
*) getpwuid (geteuid ());
83 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
85 Vuser_name
= build_string (user_name
);
87 /* If the user name claimed in the environment vars differs from
88 the real uid, use the claimed name to find the full name. */
89 tem
= Fstring_equal (Vuser_name
, Vuser_real_name
);
91 pw
= (struct passwd
*) getpwnam (XSTRING (Vuser_name
)->data
);
93 p
= (unsigned char *) (pw
? USER_FULL_NAME
: "unknown");
94 q
= (unsigned char *) index (p
, ',');
95 Vuser_full_name
= make_string (p
, q
? q
- p
: strlen (p
));
97 #ifdef AMPERSAND_FULL_NAME
98 p
= XSTRING (Vuser_full_name
)->data
;
99 q
= (char *) index (p
, '&');
100 /* Substitute the login name for the &, upcasing the first character. */
103 r
= (char *) alloca (strlen (p
) + XSTRING (Vuser_name
)->size
+ 1);
106 strcat (r
, XSTRING (Vuser_name
)->data
);
107 r
[q
- p
] = UPCASE (r
[q
- p
]);
109 Vuser_full_name
= build_string (r
);
111 #endif /* AMPERSAND_FULL_NAME */
114 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
115 "Convert arg CHAR to a one-character string containing that character.")
123 return make_string (&c
, 1);
126 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
127 "Convert arg STRING to a character, the first character of that string.")
129 register Lisp_Object str
;
131 register Lisp_Object val
;
132 register struct Lisp_String
*p
;
133 CHECK_STRING (str
, 0);
137 XFASTINT (val
) = ((unsigned char *) p
->data
)[0];
147 register Lisp_Object mark
;
148 mark
= Fmake_marker ();
149 Fset_marker (mark
, make_number (val
), Qnil
);
153 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
154 "Return value of point, as an integer.\n\
155 Beginning of buffer is position (point-min)")
159 XFASTINT (temp
) = point
;
163 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
164 "Return value of point, as a marker object.")
167 return buildmark (point
);
171 clip_to_bounds (lower
, num
, upper
)
172 int lower
, num
, upper
;
176 else if (num
> upper
)
182 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
183 "Set point to POSITION, a number or marker.\n\
184 Beginning of buffer is position (point-min), end is (point-max).")
186 register Lisp_Object n
;
188 CHECK_NUMBER_COERCE_MARKER (n
, 0);
190 SET_PT (clip_to_bounds (BEGV
, XINT (n
), ZV
));
195 region_limit (beginningp
)
198 register Lisp_Object m
;
199 m
= Fmarker_position (current_buffer
->mark
);
200 if (NILP (m
)) error ("There is no region now");
201 if ((point
< XFASTINT (m
)) == beginningp
)
202 return (make_number (point
));
207 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
208 "Return position of beginning of region, as an integer.")
211 return (region_limit (1));
214 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
215 "Return position of end of region, as an integer.")
218 return (region_limit (0));
221 #if 0 /* now in lisp code */
222 DEFUN ("mark", Fmark
, Smark
, 0, 0, 0,
223 "Return this buffer's mark value as integer, or nil if no mark.\n\
224 If you are using this in an editing command, you are most likely making\n\
225 a mistake; see the documentation of `set-mark'.")
228 return Fmarker_position (current_buffer
->mark
);
230 #endif /* commented out code */
232 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
233 "Return this buffer's mark, as a marker object.\n\
234 Watch out! Moving this marker changes the mark position.\n\
235 If you set the marker not to point anywhere, the buffer will have no mark.")
238 return current_buffer
->mark
;
241 #if 0 /* this is now in lisp code */
242 DEFUN ("set-mark", Fset_mark
, Sset_mark
, 1, 1, 0,
243 "Set this buffer's mark to POS. Don't use this function!\n\
244 That is to say, don't use this function unless you want\n\
245 the user to see that the mark has moved, and you want the previous\n\
246 mark position to be lost.\n\
248 Normally, when a new mark is set, the old one should go on the stack.\n\
249 This is why most applications should use push-mark, not set-mark.\n\
251 Novice programmers often try to use the mark for the wrong purposes.\n\
252 The mark saves a location for the user's convenience.\n\
253 Most editing commands should not alter the mark.\n\
254 To remember a location for internal use in the Lisp program,\n\
255 store it in a Lisp variable. Example:\n\
257 (let ((beg (point))) (forward-line 1) (delete-region beg (point))).")
263 current_buffer
->mark
= Qnil
;
266 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
268 if (NILP (current_buffer
->mark
))
269 current_buffer
->mark
= Fmake_marker ();
271 Fset_marker (current_buffer
->mark
, pos
, Qnil
);
274 #endif /* commented-out code */
277 save_excursion_save ()
279 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
282 return Fcons (Fpoint_marker (),
283 Fcons (Fcopy_marker (current_buffer
->mark
),
284 visible
? Qt
: Qnil
));
288 save_excursion_restore (info
)
289 register Lisp_Object info
;
291 register Lisp_Object tem
;
293 tem
= Fmarker_buffer (Fcar (info
));
294 /* If buffer being returned to is now deleted, avoid error */
295 /* Otherwise could get error here while unwinding to top level
297 /* In that case, Fmarker_buffer returns nil now. */
303 unchain_marker (tem
);
304 tem
= Fcar (Fcdr (info
));
305 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
306 unchain_marker (tem
);
307 tem
= Fcdr (Fcdr (info
));
309 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
310 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
314 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
315 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
316 Executes BODY just like `progn'.\n\
317 The values of point, mark and the current buffer are restored\n\
318 even in case of abnormal exit (throw or error).")
322 register Lisp_Object val
;
323 int count
= specpdl_ptr
- specpdl
;
325 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
328 return unbind_to (count
, val
);
331 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 0, 0,
332 "Return the number of characters in the current buffer.")
336 XFASTINT (temp
) = Z
- BEG
;
340 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
341 "Return the minimum permissible value of point in the current buffer.\n\
342 This is 1, unless a clipping restriction is in effect.")
346 XFASTINT (temp
) = BEGV
;
350 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
351 "Return a marker to the minimum permissible value of point in this buffer.\n\
352 This is the beginning, unless a clipping restriction is in effect.")
355 return buildmark (BEGV
);
358 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
359 "Return the maximum permissible value of point in the current buffer.\n\
360 This is (1+ (buffer-size)), unless a clipping restriction is in effect,\n\
361 in which case it is less.")
365 XFASTINT (temp
) = ZV
;
369 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
370 "Return a marker to the maximum permissible value of point in this buffer.\n\
371 This is (1+ (buffer-size)), unless a clipping restriction is in effect,\n\
372 in which case it is less.")
375 return buildmark (ZV
);
378 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
379 "Return the character following point, as a number.\n\
380 At the end of the buffer or accessible region, return 0.")
387 XFASTINT (temp
) = FETCH_CHAR (point
);
391 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
392 "Return the character preceding point, as a number.\n\
393 At the beginning of the buffer or accessible region, return 0.")
400 XFASTINT (temp
) = FETCH_CHAR (point
- 1);
404 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
405 "Return T if point is at the beginning of the buffer.\n\
406 If the buffer is narrowed, this means the beginning of the narrowed part.")
414 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
415 "Return T if point is at the end of the buffer.\n\
416 If the buffer is narrowed, this means the end of the narrowed part.")
424 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
425 "Return T if point is at the beginning of a line.")
428 if (point
== BEGV
|| FETCH_CHAR (point
- 1) == '\n')
433 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
434 "Return T if point is at the end of a line.\n\
435 `End of a line' includes point being at the end of the buffer.")
438 if (point
== ZV
|| FETCH_CHAR (point
) == '\n')
443 DEFUN ("char-after", Fchar_after
, Schar_after
, 1, 1, 0,
444 "Return character in current buffer at position POS.\n\
445 POS is an integer or a buffer pointer.\n\
446 If POS is out of range, the value is nil.")
450 register Lisp_Object val
;
453 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
456 if (n
< BEGV
|| n
>= ZV
) return Qnil
;
458 XFASTINT (val
) = FETCH_CHAR (n
);
462 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 0, 0,
463 "Return the name under which the user logged in, as a string.\n\
464 This is based on the effective uid, not the real uid.\n\
465 Also, if the environment variable USER or LOGNAME is set,\n\
466 that determines the value of this function.")
472 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
474 "Return the name of the user's real uid, as a string.\n\
475 Differs from `user-login-name' when running under `su'.")
478 return Vuser_real_name
;
481 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
482 "Return the effective uid of Emacs, as an integer.")
485 return make_number (geteuid ());
488 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
489 "Return the real uid of Emacs, as an integer.")
492 return make_number (getuid ());
495 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 0, 0,
496 "Return the full name of the user logged in, as a string.")
499 return Vuser_full_name
;
502 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
503 "Return the name of the machine you are running on, as a string.")
509 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
510 "Return the current time, as the number of seconds since 12:00 AM January 1970.\n\
511 The time is returned as a list of three integers. The first has the\n\
512 most significant 16 bits of the seconds, while the second has the\n\
513 least significant 16 bits. The third integer gives the microsecond\n\
516 The microsecond count is zero on systems that do not provide\n\
517 resolution finer than a second.")
521 Lisp_Object result
[3];
524 XSET (result
[0], Lisp_Int
, (EMACS_SECS (t
) >> 16) & 0xffff);
525 XSET (result
[1], Lisp_Int
, (EMACS_SECS (t
) >> 0) & 0xffff);
526 XSET (result
[2], Lisp_Int
, EMACS_USECS (t
));
528 return Flist (3, result
);
532 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 0, 0,
533 "Return the current time, as a human-readable string.\n\
534 Programs can use it too, since the number of columns in each field is fixed.\n\
535 The format is `Sun Sep 16 01:03:52 1973'.\n\
536 In a future Emacs version, the time zone may be added at the end.")
539 long current_time
= time ((long *) 0);
541 register char *tem
= (char *) ctime (¤t_time
);
543 strncpy (buf
, tem
, 24);
546 return build_string (buf
);
549 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 0, 0,
550 "Return the offset, savings state, and names for the current time zone.\n\
551 This returns a list of the form (OFFSET SAVINGS-FLAG STANDARD SAVINGS).\n\
552 OFFSET is an integer specifying how many minutes east of Greenwich the\n\
553 current time zone is located. A negative value means west of\n\
554 Greenwich. Note that this describes the standard time; If daylight\n\
555 savings time is in effect, it does not affect this value.\n\
556 SAVINGS-FLAG is non-nil iff daylight savings time or some other sort\n\
557 of seasonal time adjustment is in effect.\n\
558 STANDARD is a string giving the name of the time zone when no seasonal\n\
559 time adjustment is in effect.\n\
560 SAVINGS is a string giving the name of the time zone when there is a\n\
561 seasonal time adjustment in effect.\n\
562 If the local area does not use a seasonal time adjustment,\n\
563 SAVINGS-FLAG will always be nil, and STANDARD and SAVINGS will be the\n\
567 #ifdef EMACS_CURRENT_TIME_ZONE
568 int offset
, savings_flag
;
572 EMACS_CURRENT_TIME_ZONE (&offset
, &savings_flag
, standard
, savings
);
574 return Fcons (make_number (offset
),
575 Fcons ((savings_flag
? Qt
: Qnil
),
576 Fcons (build_string (standard
),
577 Fcons (build_string (savings
),
581 ("current-time-zone has not been implemented on this operating system.");
594 /* Callers passing one argument to Finsert need not gcpro the
595 argument "array", since the only element of the array will
596 not be used after calling insert or insert_from_string, so
597 we don't care if it gets trashed. */
599 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
600 "Insert the arguments, either strings or characters, at point.\n\
601 Point moves forward so that it ends up after the inserted text.\n\
602 Any other markers at the point of insertion remain before the text.")
605 register Lisp_Object
*args
;
608 register Lisp_Object tem
;
611 for (argnum
= 0; argnum
< nargs
; argnum
++)
615 if (XTYPE (tem
) == Lisp_Int
)
620 else if (XTYPE (tem
) == Lisp_String
)
622 insert_from_string (tem
, 0, XSTRING (tem
)->size
);
626 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
634 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
635 "Insert strings or characters at point, relocating markers after the text.\n\
636 Point moves forward so that it ends up after the inserted text.\n\
637 Any other markers at the point of insertion also end up after the text.")
640 register Lisp_Object
*args
;
643 register Lisp_Object tem
;
646 for (argnum
= 0; argnum
< nargs
; argnum
++)
650 if (XTYPE (tem
) == Lisp_Int
)
653 insert_before_markers (str
, 1);
655 else if (XTYPE (tem
) == Lisp_String
)
657 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
);
661 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
669 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 2, 0,
670 "Insert COUNT (second arg) copies of CHAR (first arg).\n\
671 Point and all markers are affected as in the function `insert'.\n\
672 Both arguments are required.")
674 Lisp_Object chr
, count
;
676 register unsigned char *string
;
680 CHECK_NUMBER (chr
, 0);
681 CHECK_NUMBER (count
, 1);
686 strlen
= min (n
, 256);
687 string
= (unsigned char *) alloca (strlen
);
688 for (i
= 0; i
< strlen
; i
++)
689 string
[i
] = XFASTINT (chr
);
692 insert (string
, strlen
);
701 /* Making strings from buffer contents. */
703 /* Return a Lisp_String containing the text of the current buffer from
704 START to END. If text properties are in use and the current buffer
705 has properties in the range specifed, the resulting string will also
708 We don't want to use plain old make_string here, because it calls
709 make_uninit_string, which can cause the buffer arena to be
710 compacted. make_string has no way of knowing that the data has
711 been moved, and thus copies the wrong data into the string. This
712 doesn't effect most of the other users of make_string, so it should
713 be left as is. But we should use this function when conjuring
714 buffer substrings. */
717 make_buffer_string (start
, end
)
722 if (start
< GPT
&& GPT
< end
)
725 result
= make_uninit_string (end
- start
);
726 bcopy (&FETCH_CHAR (start
), XSTRING (result
)->data
, end
- start
);
728 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
729 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
734 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
735 "Return the contents of part of the current buffer as a string.\n\
736 The two arguments START and END are character positions;\n\
737 they can be in either order.")
741 register int beg
, end
;
743 validate_region (&b
, &e
);
747 return make_buffer_string (beg
, end
);
750 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
751 "Return the contents of the current buffer as a string.")
754 return make_buffer_string (BEGV
, ZV
);
757 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
759 "Insert before point a substring of the contents buffer BUFFER.\n\
760 BUFFER may be a buffer or a buffer name.\n\
761 Arguments START and END are character numbers specifying the substring.\n\
762 They default to the beginning and the end of BUFFER.")
764 Lisp_Object buf
, b
, e
;
766 register int beg
, end
, temp
, len
, opoint
, start
;
767 register struct buffer
*bp
;
769 buf
= Fget_buffer (buf
);
776 CHECK_NUMBER_COERCE_MARKER (b
, 0);
783 CHECK_NUMBER_COERCE_MARKER (e
, 1);
788 temp
= beg
, beg
= end
, end
= temp
;
790 /* Move the gap or create enough gap in the current buffer. */
794 if (GAP_SIZE
< end
- beg
)
795 make_gap (end
- beg
- GAP_SIZE
);
801 if (!(BUF_BEGV (bp
) <= beg
803 && end
<= BUF_ZV (bp
)))
804 args_out_of_range (b
, e
);
806 /* Now the actual insertion will not do any gap motion,
807 so it matters not if BUF is the current buffer. */
808 if (beg
< BUF_GPT (bp
))
810 insert (BUF_CHAR_ADDRESS (bp
, beg
), min (end
, BUF_GPT (bp
)) - beg
);
811 beg
= min (end
, BUF_GPT (bp
));
814 insert (BUF_CHAR_ADDRESS (bp
, beg
), end
- beg
);
816 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
817 graft_intervals_into_buffer (copy_intervals (bp
->intervals
, start
, len
),
823 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
824 Ssubst_char_in_region
, 4, 5, 0,
825 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
826 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
827 and don't mark the buffer as really changed.")
828 (start
, end
, fromchar
, tochar
, noundo
)
829 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
831 register int pos
, stop
, look
;
833 validate_region (&start
, &end
);
834 CHECK_NUMBER (fromchar
, 2);
835 CHECK_NUMBER (tochar
, 3);
839 look
= XINT (fromchar
);
841 modify_region (pos
, stop
);
844 if (MODIFF
- 1 == current_buffer
->save_modified
)
845 current_buffer
->save_modified
++;
846 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
847 current_buffer
->auto_save_modified
++;
852 if (FETCH_CHAR (pos
) == look
)
855 record_change (pos
, 1);
856 FETCH_CHAR (pos
) = XINT (tochar
);
858 signal_after_change (pos
, 1, 1);
866 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
867 "From START to END, translate characters according to TABLE.\n\
868 TABLE is a string; the Nth character in it is the mapping\n\
869 for the character with code N. Returns the number of characters changed.")
873 register Lisp_Object table
;
875 register int pos
, stop
; /* Limits of the region. */
876 register unsigned char *tt
; /* Trans table. */
877 register int oc
; /* Old character. */
878 register int nc
; /* New character. */
879 int cnt
; /* Number of changes made. */
880 Lisp_Object z
; /* Return. */
881 int size
; /* Size of translate table. */
883 validate_region (&start
, &end
);
884 CHECK_STRING (table
, 2);
886 size
= XSTRING (table
)->size
;
887 tt
= XSTRING (table
)->data
;
891 modify_region (pos
, stop
);
894 for (; pos
< stop
; ++pos
)
896 oc
= FETCH_CHAR (pos
);
902 record_change (pos
, 1);
903 FETCH_CHAR (pos
) = nc
;
904 signal_after_change (pos
, 1, 1);
914 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
915 "Delete the text between point and mark.\n\
916 When called from a program, expects two arguments,\n\
917 positions (integers or markers) specifying the stretch to be deleted.")
921 validate_region (&b
, &e
);
922 del_range (XINT (b
), XINT (e
));
926 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
927 "Remove restrictions (narrowing) from current buffer.\n\
928 This allows the buffer's full text to be seen and edited.")
932 SET_BUF_ZV (current_buffer
, Z
);
934 /* Changing the buffer bounds invalidates any recorded current column. */
935 invalidate_current_column ();
939 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
940 "Restrict editing in this buffer to the current region.\n\
941 The rest of the text becomes temporarily invisible and untouchable\n\
942 but is not deleted; if you save the buffer in a file, the invisible\n\
943 text is included in the file. \\[widen] makes all visible again.\n\
944 See also `save-restriction'.\n\
946 When calling from a program, pass two arguments; positions (integers\n\
947 or markers) bounding the text that should remain visible.")
949 register Lisp_Object b
, e
;
953 CHECK_NUMBER_COERCE_MARKER (b
, 0);
954 CHECK_NUMBER_COERCE_MARKER (e
, 1);
956 if (XINT (b
) > XINT (e
))
963 if (!(BEG
<= XINT (b
) && XINT (b
) <= XINT (e
) && XINT (e
) <= Z
))
964 args_out_of_range (b
, e
);
967 SET_BUF_ZV (current_buffer
, XFASTINT (e
));
968 if (point
< XFASTINT (b
))
969 SET_PT (XFASTINT (b
));
970 if (point
> XFASTINT (e
))
971 SET_PT (XFASTINT (e
));
973 /* Changing the buffer bounds invalidates any recorded current column. */
974 invalidate_current_column ();
979 save_restriction_save ()
981 register Lisp_Object bottom
, top
;
982 /* Note: I tried using markers here, but it does not win
983 because insertion at the end of the saved region
984 does not advance mh and is considered "outside" the saved region. */
985 XFASTINT (bottom
) = BEGV
- BEG
;
986 XFASTINT (top
) = Z
- ZV
;
988 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
992 save_restriction_restore (data
)
995 register struct buffer
*buf
;
996 register int newhead
, newtail
;
997 register Lisp_Object tem
;
999 buf
= XBUFFER (XCONS (data
)->car
);
1001 data
= XCONS (data
)->cdr
;
1003 tem
= XCONS (data
)->car
;
1004 newhead
= XINT (tem
);
1005 tem
= XCONS (data
)->cdr
;
1006 newtail
= XINT (tem
);
1007 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1012 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1013 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1016 /* If point is outside the new visible range, move it inside. */
1018 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1023 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1024 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1025 The buffer's restrictions make parts of the beginning and end invisible.\n\
1026 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1027 This special form, `save-restriction', saves the current buffer's restrictions\n\
1028 when it is entered, and restores them when it is exited.\n\
1029 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1030 The old restrictions settings are restored\n\
1031 even in case of abnormal exit (throw or error).\n\
1033 The value returned is the value of the last form in BODY.\n\
1035 `save-restriction' can get confused if, within the BODY, you widen\n\
1036 and then make changes outside the area within the saved restrictions.\n\
1038 Note: if you are using both `save-excursion' and `save-restriction',\n\
1039 use `save-excursion' outermost:\n\
1040 (save-excursion (save-restriction ...))")
1044 register Lisp_Object val
;
1045 int count
= specpdl_ptr
- specpdl
;
1047 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1048 val
= Fprogn (body
);
1049 return unbind_to (count
, val
);
1052 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
1053 "Print a one-line message at the bottom of the screen.\n\
1054 The first argument is a control string.\n\
1055 It may contain %s or %d or %c to print successive following arguments.\n\
1056 %s means print an argument as a string, %d means print as number in decimal,\n\
1057 %c means print a number as a single character.\n\
1058 The argument used by %s must be a string or a symbol;\n\
1059 the argument used by %d or %c must be a number.\n\
1060 If the first argument is nil, clear any existing message; let the\n\
1061 minibuffer contents show.")
1070 register Lisp_Object val
;
1071 val
= Fformat (nargs
, args
);
1072 message ("%s", XSTRING (val
)->data
);
1077 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
1078 "Format a string out of a control-string and arguments.\n\
1079 The first argument is a control string.\n\
1080 The other arguments are substituted into it to make the result, a string.\n\
1081 It may contain %-sequences meaning to substitute the next argument.\n\
1082 %s means print a string argument. Actually, prints any object, with `princ'.\n\
1083 %d means print as number in decimal (%o octal, %x hex).\n\
1084 %c means print a number as a single character.\n\
1085 %S means print any object as an s-expression (using prin1).\n\
1086 The argument used for %d, %o, %x or %c must be a number.\n\
1087 Use %% to put a single % into the output.")
1090 register Lisp_Object
*args
;
1092 register int n
; /* The number of the next arg to substitute */
1093 register int total
= 5; /* An estimate of the final length */
1095 register unsigned char *format
, *end
;
1097 extern char *index ();
1098 /* It should not be necessary to GCPRO ARGS, because
1099 the caller in the interpreter should take care of that. */
1101 CHECK_STRING (args
[0], 0);
1102 format
= XSTRING (args
[0])->data
;
1103 end
= format
+ XSTRING (args
[0])->size
;
1106 while (format
!= end
)
1107 if (*format
++ == '%')
1111 /* Process a numeric arg and skip it. */
1112 minlen
= atoi (format
);
1117 while ((*format
>= '0' && *format
<= '9')
1118 || *format
== '-' || *format
== ' ' || *format
== '.')
1123 else if (++n
>= nargs
)
1125 else if (*format
== 'S')
1127 /* For `S', prin1 the argument and then treat like a string. */
1128 register Lisp_Object tem
;
1129 tem
= Fprin1_to_string (args
[n
], Qnil
);
1133 else if (XTYPE (args
[n
]) == Lisp_Symbol
)
1135 XSET (args
[n
], Lisp_String
, XSYMBOL (args
[n
])->name
);
1138 else if (XTYPE (args
[n
]) == Lisp_String
)
1141 total
+= XSTRING (args
[n
])->size
;
1143 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
1144 else if (XTYPE (args
[n
]) == Lisp_Int
&& *format
!= 's')
1146 #ifdef LISP_FLOAT_TYPE
1147 /* The following loop issumes the Lisp type indicates
1148 the proper way to pass the argument.
1149 So make sure we have a flonum if the argument should
1151 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
1152 args
[n
] = Ffloat (args
[n
]);
1156 #ifdef LISP_FLOAT_TYPE
1157 else if (XTYPE (args
[n
]) == Lisp_Float
&& *format
!= 's')
1159 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
1160 args
[n
] = Ftruncate (args
[n
]);
1166 /* Anything but a string, convert to a string using princ. */
1167 register Lisp_Object tem
;
1168 tem
= Fprin1_to_string (args
[n
], Qt
);
1175 register int nstrings
= n
+ 1;
1176 register unsigned char **strings
1177 = (unsigned char **) alloca (nstrings
* sizeof (unsigned char *));
1179 for (n
= 0; n
< nstrings
; n
++)
1182 strings
[n
] = (unsigned char *) "";
1183 else if (XTYPE (args
[n
]) == Lisp_Int
)
1184 /* We checked above that the corresponding format effector
1185 isn't %s, which would cause MPV. */
1186 strings
[n
] = (unsigned char *) XINT (args
[n
]);
1187 #ifdef LISP_FLOAT_TYPE
1188 else if (XTYPE (args
[n
]) == Lisp_Float
)
1190 union { double d
; int half
[2]; } u
;
1192 u
.d
= XFLOAT (args
[n
])->data
;
1193 strings
[n
++] = (unsigned char *) u
.half
[0];
1194 strings
[n
] = (unsigned char *) u
.half
[1];
1198 strings
[n
] = XSTRING (args
[n
])->data
;
1201 /* Format it in bigger and bigger buf's until it all fits. */
1204 buf
= (char *) alloca (total
+ 1);
1207 length
= doprnt (buf
, total
+ 1, strings
[0], end
, nargs
, strings
+ 1);
1208 if (buf
[total
- 1] == 0)
1216 return make_string (buf
, length
);
1222 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
1223 int arg0
, arg1
, arg2
, arg3
, arg4
;
1237 doprnt (buf
, sizeof buf
, string1
, 0, 5, args
);
1239 doprnt (buf
, sizeof buf
, string1
, 0, 5, &string1
+ 1);
1241 return build_string (buf
);
1244 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
1245 "Return t if two characters match, optionally ignoring case.\n\
1246 Both arguments must be characters (i.e. integers).\n\
1247 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
1249 register Lisp_Object c1
, c2
;
1251 unsigned char *downcase
= DOWNCASE_TABLE
;
1252 CHECK_NUMBER (c1
, 0);
1253 CHECK_NUMBER (c2
, 1);
1255 if (!NILP (current_buffer
->case_fold_search
)
1256 ? downcase
[0xff & XFASTINT (c1
)] == downcase
[0xff & XFASTINT (c2
)]
1257 : XINT (c1
) == XINT (c2
))
1266 DEFVAR_LISP ("system-name", &Vsystem_name
,
1267 "The name of the machine Emacs is running on.");
1269 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
1270 "The full name of the user logged in.");
1272 DEFVAR_LISP ("user-name", &Vuser_name
,
1273 "The user's name, based on the effective uid.");
1275 DEFVAR_LISP ("user-real-name", &Vuser_real_name
,
1276 "The user's name, base upon the real uid.");
1278 defsubr (&Schar_equal
);
1279 defsubr (&Sgoto_char
);
1280 defsubr (&Sstring_to_char
);
1281 defsubr (&Schar_to_string
);
1282 defsubr (&Sbuffer_substring
);
1283 defsubr (&Sbuffer_string
);
1285 defsubr (&Spoint_marker
);
1286 defsubr (&Smark_marker
);
1288 defsubr (&Sregion_beginning
);
1289 defsubr (&Sregion_end
);
1290 /* defsubr (&Smark); */
1291 /* defsubr (&Sset_mark); */
1292 defsubr (&Ssave_excursion
);
1294 defsubr (&Sbufsize
);
1295 defsubr (&Spoint_max
);
1296 defsubr (&Spoint_min
);
1297 defsubr (&Spoint_min_marker
);
1298 defsubr (&Spoint_max_marker
);
1304 defsubr (&Sfollowing_char
);
1305 defsubr (&Sprevious_char
);
1306 defsubr (&Schar_after
);
1308 defsubr (&Sinsert_before_markers
);
1309 defsubr (&Sinsert_char
);
1311 defsubr (&Suser_login_name
);
1312 defsubr (&Suser_real_login_name
);
1313 defsubr (&Suser_uid
);
1314 defsubr (&Suser_real_uid
);
1315 defsubr (&Suser_full_name
);
1316 defsubr (&Scurrent_time
);
1317 defsubr (&Scurrent_time_string
);
1318 defsubr (&Scurrent_time_zone
);
1319 defsubr (&Ssystem_name
);
1320 defsubr (&Smessage
);
1323 defsubr (&Sinsert_buffer_substring
);
1324 defsubr (&Ssubst_char_in_region
);
1325 defsubr (&Stranslate_region
);
1326 defsubr (&Sdelete_region
);
1328 defsubr (&Snarrow_to_region
);
1329 defsubr (&Ssave_restriction
);