1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985, 1986, 1987, 1989, 1993 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. */
21 #include <sys/types.h>
32 #include "intervals.h"
38 #define min(a, b) ((a) < (b) ? (a) : (b))
39 #define max(a, b) ((a) > (b) ? (a) : (b))
41 /* Some static data, and a function to initialize it for each run */
43 Lisp_Object Vsystem_name
;
44 Lisp_Object Vuser_real_name
; /* login name of current user ID */
45 Lisp_Object Vuser_full_name
; /* full name of current user */
46 Lisp_Object Vuser_name
; /* user name from USER or LOGNAME. */
52 register unsigned char *p
, *q
, *r
;
53 struct passwd
*pw
; /* password entry for the current user */
54 extern char *index ();
57 /* Set up system_name even when dumping. */
59 Vsystem_name
= build_string (get_system_name ());
60 p
= XSTRING (Vsystem_name
)->data
;
63 if (*p
== ' ' || *p
== '\t')
69 /* Don't bother with this on initial start when just dumping out */
72 #endif /* not CANNOT_DUMP */
74 pw
= (struct passwd
*) getpwuid (getuid ());
75 Vuser_real_name
= build_string (pw
? pw
->pw_name
: "unknown");
77 /* Get the effective user name, by consulting environment variables,
78 or the effective uid if those are unset. */
79 user_name
= (char *) getenv ("USER");
81 user_name
= (char *) getenv ("LOGNAME");
84 pw
= (struct passwd
*) getpwuid (geteuid ());
85 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
87 Vuser_name
= build_string (user_name
);
89 /* If the user name claimed in the environment vars differs from
90 the real uid, use the claimed name to find the full name. */
91 tem
= Fstring_equal (Vuser_name
, Vuser_real_name
);
93 pw
= (struct passwd
*) getpwnam (XSTRING (Vuser_name
)->data
);
95 p
= (unsigned char *) (pw
? USER_FULL_NAME
: "unknown");
96 q
= (unsigned char *) index (p
, ',');
97 Vuser_full_name
= make_string (p
, q
? q
- p
: strlen (p
));
99 #ifdef AMPERSAND_FULL_NAME
100 p
= XSTRING (Vuser_full_name
)->data
;
101 q
= (char *) index (p
, '&');
102 /* Substitute the login name for the &, upcasing the first character. */
105 r
= (char *) alloca (strlen (p
) + XSTRING (Vuser_name
)->size
+ 1);
108 strcat (r
, XSTRING (Vuser_name
)->data
);
109 r
[q
- p
] = UPCASE (r
[q
- p
]);
111 Vuser_full_name
= build_string (r
);
113 #endif /* AMPERSAND_FULL_NAME */
116 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
117 "Convert arg CHAR to a one-character string containing that character.")
125 return make_string (&c
, 1);
128 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
129 "Convert arg STRING to a character, the first character of that string.")
131 register Lisp_Object str
;
133 register Lisp_Object val
;
134 register struct Lisp_String
*p
;
135 CHECK_STRING (str
, 0);
139 XFASTINT (val
) = ((unsigned char *) p
->data
)[0];
149 register Lisp_Object mark
;
150 mark
= Fmake_marker ();
151 Fset_marker (mark
, make_number (val
), Qnil
);
155 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
156 "Return value of point, as an integer.\n\
157 Beginning of buffer is position (point-min)")
161 XFASTINT (temp
) = point
;
165 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
166 "Return value of point, as a marker object.")
169 return buildmark (point
);
173 clip_to_bounds (lower
, num
, upper
)
174 int lower
, num
, upper
;
178 else if (num
> upper
)
184 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
185 "Set point to POSITION, a number or marker.\n\
186 Beginning of buffer is position (point-min), end is (point-max).")
188 register Lisp_Object n
;
190 CHECK_NUMBER_COERCE_MARKER (n
, 0);
192 SET_PT (clip_to_bounds (BEGV
, XINT (n
), ZV
));
197 region_limit (beginningp
)
200 extern Lisp_Object Vmark_even_if_inactive
; /* Defined in callint.c. */
201 register Lisp_Object m
;
202 if (!NILP (Vtransient_mark_mode
) && NILP (Vmark_even_if_inactive
)
203 && NILP (current_buffer
->mark_active
))
204 Fsignal (Qmark_inactive
, Qnil
);
205 m
= Fmarker_position (current_buffer
->mark
);
206 if (NILP (m
)) error ("There is no region now");
207 if ((point
< XFASTINT (m
)) == beginningp
)
208 return (make_number (point
));
213 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
214 "Return position of beginning of region, as an integer.")
217 return (region_limit (1));
220 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
221 "Return position of end of region, as an integer.")
224 return (region_limit (0));
227 #if 0 /* now in lisp code */
228 DEFUN ("mark", Fmark
, Smark
, 0, 0, 0,
229 "Return this buffer's mark value as integer, or nil if no mark.\n\
230 If you are using this in an editing command, you are most likely making\n\
231 a mistake; see the documentation of `set-mark'.")
234 return Fmarker_position (current_buffer
->mark
);
236 #endif /* commented out code */
238 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
239 "Return this buffer's mark, as a marker object.\n\
240 Watch out! Moving this marker changes the mark position.\n\
241 If you set the marker not to point anywhere, the buffer will have no mark.")
244 return current_buffer
->mark
;
247 #if 0 /* this is now in lisp code */
248 DEFUN ("set-mark", Fset_mark
, Sset_mark
, 1, 1, 0,
249 "Set this buffer's mark to POS. Don't use this function!\n\
250 That is to say, don't use this function unless you want\n\
251 the user to see that the mark has moved, and you want the previous\n\
252 mark position to be lost.\n\
254 Normally, when a new mark is set, the old one should go on the stack.\n\
255 This is why most applications should use push-mark, not set-mark.\n\
257 Novice programmers often try to use the mark for the wrong purposes.\n\
258 The mark saves a location for the user's convenience.\n\
259 Most editing commands should not alter the mark.\n\
260 To remember a location for internal use in the Lisp program,\n\
261 store it in a Lisp variable. Example:\n\
263 (let ((beg (point))) (forward-line 1) (delete-region beg (point))).")
269 current_buffer
->mark
= Qnil
;
272 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
274 if (NILP (current_buffer
->mark
))
275 current_buffer
->mark
= Fmake_marker ();
277 Fset_marker (current_buffer
->mark
, pos
, Qnil
);
280 #endif /* commented-out code */
283 save_excursion_save ()
285 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
288 return Fcons (Fpoint_marker (),
289 Fcons (Fcopy_marker (current_buffer
->mark
),
290 Fcons (visible
? Qt
: Qnil
,
291 current_buffer
->mark_active
)));
295 save_excursion_restore (info
)
296 register Lisp_Object info
;
298 register Lisp_Object tem
, tem1
;
300 tem
= Fmarker_buffer (Fcar (info
));
301 /* If buffer being returned to is now deleted, avoid error */
302 /* Otherwise could get error here while unwinding to top level
304 /* In that case, Fmarker_buffer returns nil now. */
310 unchain_marker (tem
);
311 tem
= Fcar (Fcdr (info
));
312 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
313 unchain_marker (tem
);
314 tem
= Fcdr (Fcdr (info
));
315 #if 0 /* We used to make the current buffer visible in the selected window
316 if that was true previously. That avoids some anomalies.
317 But it creates others, and it wasn't documented, and it is simpler
318 and cleaner never to alter the window/buffer connections. */
321 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
322 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
325 tem1
= current_buffer
->mark_active
;
326 current_buffer
->mark_active
= Fcdr (tem
);
327 if (! NILP (current_buffer
->mark_active
))
328 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
329 else if (! NILP (tem1
))
330 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
334 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
335 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
336 Executes BODY just like `progn'.\n\
337 The values of point, mark and the current buffer are restored\n\
338 even in case of abnormal exit (throw or error).\n\
339 The state of activation of the mark is also restored.")
343 register Lisp_Object val
;
344 int count
= specpdl_ptr
- specpdl
;
346 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
349 return unbind_to (count
, val
);
352 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 0, 0,
353 "Return the number of characters in the current buffer.")
357 XFASTINT (temp
) = Z
- BEG
;
361 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
362 "Return the minimum permissible value of point in the current buffer.\n\
363 This is 1, unless narrowing (a buffer restriction) is in effect.")
367 XFASTINT (temp
) = BEGV
;
371 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
372 "Return a marker to the minimum permissible value of point in this buffer.\n\
373 This is the beginning, unless narrowing (a buffer restriction) is in effect.")
376 return buildmark (BEGV
);
379 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
380 "Return the maximum permissible value of point in the current buffer.\n\
381 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
382 is in effect, in which case it is less.")
386 XFASTINT (temp
) = ZV
;
390 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
391 "Return a marker to the maximum permissible value of point in this buffer.\n\
392 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
393 is in effect, in which case it is less.")
396 return buildmark (ZV
);
399 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
400 "Return the character following point, as a number.\n\
401 At the end of the buffer or accessible region, return 0.")
408 XFASTINT (temp
) = FETCH_CHAR (point
);
412 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
413 "Return the character preceding point, as a number.\n\
414 At the beginning of the buffer or accessible region, return 0.")
421 XFASTINT (temp
) = FETCH_CHAR (point
- 1);
425 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
426 "Return T if point is at the beginning of the buffer.\n\
427 If the buffer is narrowed, this means the beginning of the narrowed part.")
435 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
436 "Return T if point is at the end of the buffer.\n\
437 If the buffer is narrowed, this means the end of the narrowed part.")
445 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
446 "Return T if point is at the beginning of a line.")
449 if (point
== BEGV
|| FETCH_CHAR (point
- 1) == '\n')
454 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
455 "Return T if point is at the end of a line.\n\
456 `End of a line' includes point being at the end of the buffer.")
459 if (point
== ZV
|| FETCH_CHAR (point
) == '\n')
464 DEFUN ("char-after", Fchar_after
, Schar_after
, 1, 1, 0,
465 "Return character in current buffer at position POS.\n\
466 POS is an integer or a buffer pointer.\n\
467 If POS is out of range, the value is nil.")
471 register Lisp_Object val
;
474 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
477 if (n
< BEGV
|| n
>= ZV
) return Qnil
;
479 XFASTINT (val
) = FETCH_CHAR (n
);
483 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 0, 0,
484 "Return the name under which the user logged in, as a string.\n\
485 This is based on the effective uid, not the real uid.\n\
486 Also, if the environment variable USER or LOGNAME is set,\n\
487 that determines the value of this function.")
493 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
495 "Return the name of the user's real uid, as a string.\n\
496 Differs from `user-login-name' when running under `su'.")
499 return Vuser_real_name
;
502 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
503 "Return the effective uid of Emacs, as an integer.")
506 return make_number (geteuid ());
509 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
510 "Return the real uid of Emacs, as an integer.")
513 return make_number (getuid ());
516 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 0, 0,
517 "Return the full name of the user logged in, as a string.")
520 return Vuser_full_name
;
523 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
524 "Return the name of the machine you are running on, as a string.")
530 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
531 "Return the current time, as the number of seconds since 12:00 AM January 1970.\n\
532 The time is returned as a list of three integers. The first has the\n\
533 most significant 16 bits of the seconds, while the second has the\n\
534 least significant 16 bits. The third integer gives the microsecond\n\
537 The microsecond count is zero on systems that do not provide\n\
538 resolution finer than a second.")
542 Lisp_Object result
[3];
545 XSET (result
[0], Lisp_Int
, (EMACS_SECS (t
) >> 16) & 0xffff);
546 XSET (result
[1], Lisp_Int
, (EMACS_SECS (t
) >> 0) & 0xffff);
547 XSET (result
[2], Lisp_Int
, EMACS_USECS (t
));
549 return Flist (3, result
);
554 lisp_time_argument (specified_time
, result
)
555 Lisp_Object specified_time
;
558 if (NILP (specified_time
))
559 return time (result
) != -1;
562 Lisp_Object high
, low
;
563 high
= Fcar (specified_time
);
564 CHECK_NUMBER (high
, 0);
565 low
= Fcdr (specified_time
);
566 if (XTYPE (low
) == Lisp_Cons
)
568 CHECK_NUMBER (low
, 0);
569 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
570 return *result
>> 16 == XINT (high
);
574 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
575 "Return the current time, as a human-readable string.\n\
576 Programs can use this function to decode a time,\n\
577 since the number of columns in each field is fixed.\n\
578 The format is `Sun Sep 16 01:03:52 1973'.\n\
579 If an argument is given, it specifies a time to format\n\
580 instead of the current time. The argument should have the form:\n\
583 (HIGH LOW . IGNORED).\n\
584 Thus, you can use times obtained from `current-time'\n\
585 and from `file-attributes'.")
587 Lisp_Object specified_time
;
593 if (! lisp_time_argument (specified_time
, &value
))
595 tem
= (char *) ctime (&value
);
597 strncpy (buf
, tem
, 24);
600 return build_string (buf
);
603 #define TM_YEAR_ORIGIN 1900
605 /* Yield A - B, measured in seconds. */
610 int ay
= a
->tm_year
+ (TM_YEAR_ORIGIN
- 1);
611 int by
= b
->tm_year
+ (TM_YEAR_ORIGIN
- 1);
616 /* difference in day of year */
617 a
->tm_yday
- b
->tm_yday
618 /* + intervening leap days */
619 + ((ay
>> 2) - (by
>> 2))
621 + ((ay
/100 >> 2) - (by
/100 >> 2))
622 /* + difference in years * 365 */
623 + (long)(ay
-by
) * 365
624 )*24 + (a
->tm_hour
- b
->tm_hour
)
625 )*60 + (a
->tm_min
- b
->tm_min
)
626 )*60 + (a
->tm_sec
- b
->tm_sec
);
629 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
630 "Return the offset and name for the local time zone.\n\
631 This returns a list of the form (OFFSET NAME).\n\
632 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
633 A negative value means west of Greenwich.\n\
634 NAME is a string giving the name of the time zone.\n\
635 If an argument is given, it specifies when the time zone offset is determined\n\
636 instead of using the current time. The argument should have the form:\n\
639 (HIGH LOW . IGNORED).\n\
640 Thus, you can use times obtained from `current-time'\n\
641 and from `file-attributes'.\n\
643 Some operating systems cannot provide all this information to Emacs;\n\
644 in this case, `current-time-zone' returns a list containing nil for\n\
645 the data it can't find.")
647 Lisp_Object specified_time
;
652 if (lisp_time_argument (specified_time
, &value
)
653 && (t
= gmtime (&value
)) != 0)
659 gmt
= *t
; /* Make a copy, in case localtime modifies *t. */
660 t
= localtime (&value
);
661 offset
= difftm (t
, &gmt
);
666 #else /* not HAVE_TM_ZONE */
668 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
669 s
= tzname
[t
->tm_isdst
];
671 #endif /* not HAVE_TM_ZONE */
674 /* No local time zone name is available; use "+-NNNN" instead. */
675 int am
= (offset
< 0 ? -offset
: offset
) / 60;
676 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
679 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
682 return Fmake_list (2, Qnil
);
694 /* Callers passing one argument to Finsert need not gcpro the
695 argument "array", since the only element of the array will
696 not be used after calling insert or insert_from_string, so
697 we don't care if it gets trashed. */
699 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
700 "Insert the arguments, either strings or characters, at point.\n\
701 Point moves forward so that it ends up after the inserted text.\n\
702 Any other markers at the point of insertion remain before the text.")
705 register Lisp_Object
*args
;
708 register Lisp_Object tem
;
711 for (argnum
= 0; argnum
< nargs
; argnum
++)
715 if (XTYPE (tem
) == Lisp_Int
)
720 else if (XTYPE (tem
) == Lisp_String
)
722 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 0);
726 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
734 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
736 "Insert the arguments at point, inheriting properties from adjoining text.\n\
737 Point moves forward so that it ends up after the inserted text.\n\
738 Any other markers at the point of insertion remain before the text.")
741 register Lisp_Object
*args
;
744 register Lisp_Object tem
;
747 for (argnum
= 0; argnum
< nargs
; argnum
++)
751 if (XTYPE (tem
) == Lisp_Int
)
756 else if (XTYPE (tem
) == Lisp_String
)
758 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 1);
762 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
770 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
771 "Insert strings or characters at point, relocating markers after the text.\n\
772 Point moves forward so that it ends up after the inserted text.\n\
773 Any other markers at the point of insertion also end up after the text.")
776 register Lisp_Object
*args
;
779 register Lisp_Object tem
;
782 for (argnum
= 0; argnum
< nargs
; argnum
++)
786 if (XTYPE (tem
) == Lisp_Int
)
789 insert_before_markers (str
, 1);
791 else if (XTYPE (tem
) == Lisp_String
)
793 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 0);
797 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
805 DEFUN ("insert-before-markers-and-inherit",
806 Finsert_and_inherit_before_markers
, Sinsert_and_inherit_before_markers
,
808 "Insert text at point, relocating markers and inheriting properties.\n\
809 Point moves forward so that it ends up after the inserted text.\n\
810 Any other markers at the point of insertion also end up after the text.")
813 register Lisp_Object
*args
;
816 register Lisp_Object tem
;
819 for (argnum
= 0; argnum
< nargs
; argnum
++)
823 if (XTYPE (tem
) == Lisp_Int
)
826 insert_before_markers (str
, 1);
828 else if (XTYPE (tem
) == Lisp_String
)
830 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 1);
834 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
842 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 2, 0,
843 "Insert COUNT (second arg) copies of CHAR (first arg).\n\
844 Point and all markers are affected as in the function `insert'.\n\
845 Both arguments are required.")
847 Lisp_Object chr
, count
;
849 register unsigned char *string
;
853 CHECK_NUMBER (chr
, 0);
854 CHECK_NUMBER (count
, 1);
859 strlen
= min (n
, 256);
860 string
= (unsigned char *) alloca (strlen
);
861 for (i
= 0; i
< strlen
; i
++)
862 string
[i
] = XFASTINT (chr
);
865 insert (string
, strlen
);
874 /* Making strings from buffer contents. */
876 /* Return a Lisp_String containing the text of the current buffer from
877 START to END. If text properties are in use and the current buffer
878 has properties in the range specified, the resulting string will also
881 We don't want to use plain old make_string here, because it calls
882 make_uninit_string, which can cause the buffer arena to be
883 compacted. make_string has no way of knowing that the data has
884 been moved, and thus copies the wrong data into the string. This
885 doesn't effect most of the other users of make_string, so it should
886 be left as is. But we should use this function when conjuring
887 buffer substrings. */
890 make_buffer_string (start
, end
)
893 Lisp_Object result
, tem
;
895 if (start
< GPT
&& GPT
< end
)
898 result
= make_uninit_string (end
- start
);
899 bcopy (&FETCH_CHAR (start
), XSTRING (result
)->data
, end
- start
);
901 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
903 #ifdef USE_TEXT_PROPERTIES
904 if (XINT (tem
) != end
)
905 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
911 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
912 "Return the contents of part of the current buffer as a string.\n\
913 The two arguments START and END are character positions;\n\
914 they can be in either order.")
918 register int beg
, end
;
920 validate_region (&b
, &e
);
924 return make_buffer_string (beg
, end
);
927 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
928 "Return the contents of the current buffer as a string.")
931 return make_buffer_string (BEGV
, ZV
);
934 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
936 "Insert before point a substring of the contents of buffer BUFFER.\n\
937 BUFFER may be a buffer or a buffer name.\n\
938 Arguments START and END are character numbers specifying the substring.\n\
939 They default to the beginning and the end of BUFFER.")
941 Lisp_Object buf
, b
, e
;
943 register int beg
, end
, temp
, len
, opoint
, start
;
944 register struct buffer
*bp
;
947 buffer
= Fget_buffer (buf
);
950 bp
= XBUFFER (buffer
);
956 CHECK_NUMBER_COERCE_MARKER (b
, 0);
963 CHECK_NUMBER_COERCE_MARKER (e
, 1);
968 temp
= beg
, beg
= end
, end
= temp
;
970 /* Move the gap or create enough gap in the current buffer. */
974 if (GAP_SIZE
< end
- beg
)
975 make_gap (end
- beg
- GAP_SIZE
);
981 if (!(BUF_BEGV (bp
) <= beg
983 && end
<= BUF_ZV (bp
)))
984 args_out_of_range (b
, e
);
986 /* Now the actual insertion will not do any gap motion,
987 so it matters not if BUF is the current buffer. */
988 if (beg
< BUF_GPT (bp
))
990 insert (BUF_CHAR_ADDRESS (bp
, beg
), min (end
, BUF_GPT (bp
)) - beg
);
991 beg
= min (end
, BUF_GPT (bp
));
994 insert (BUF_CHAR_ADDRESS (bp
, beg
), end
- beg
);
996 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
997 graft_intervals_into_buffer (copy_intervals (bp
->intervals
, start
, len
),
998 opoint
, len
, current_buffer
, 0);
1003 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
1005 "Compare two substrings of two buffers; return result as number.\n\
1006 the value is -N if first string is less after N-1 chars,\n\
1007 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
1008 Each substring is represented as three arguments: BUFFER, START and END.\n\
1009 That makes six args in all, three for each substring.\n\n\
1010 The value of `case-fold-search' in the current buffer\n\
1011 determines whether case is significant or ignored.")
1012 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
1013 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
1015 register int begp1
, endp1
, begp2
, endp2
, temp
, len1
, len2
, length
, i
;
1016 register struct buffer
*bp1
, *bp2
;
1017 register unsigned char *trt
1018 = (!NILP (current_buffer
->case_fold_search
)
1019 ? XSTRING (current_buffer
->case_canon_table
)->data
: 0);
1021 /* Find the first buffer and its substring. */
1024 bp1
= current_buffer
;
1028 buf1
= Fget_buffer (buffer1
);
1031 bp1
= XBUFFER (buf1
);
1035 begp1
= BUF_BEGV (bp1
);
1038 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
1039 begp1
= XINT (start1
);
1042 endp1
= BUF_ZV (bp1
);
1045 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
1046 endp1
= XINT (end1
);
1050 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
1052 if (!(BUF_BEGV (bp1
) <= begp1
1054 && endp1
<= BUF_ZV (bp1
)))
1055 args_out_of_range (start1
, end1
);
1057 /* Likewise for second substring. */
1060 bp2
= current_buffer
;
1064 buf2
= Fget_buffer (buffer2
);
1067 bp2
= XBUFFER (buffer2
);
1071 begp2
= BUF_BEGV (bp2
);
1074 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
1075 begp2
= XINT (start2
);
1078 endp2
= BUF_ZV (bp2
);
1081 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
1082 endp2
= XINT (end2
);
1086 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
1088 if (!(BUF_BEGV (bp2
) <= begp2
1090 && endp2
<= BUF_ZV (bp2
)))
1091 args_out_of_range (start2
, end2
);
1093 len1
= endp1
- begp1
;
1094 len2
= endp2
- begp2
;
1099 for (i
= 0; i
< length
; i
++)
1101 int c1
= *BUF_CHAR_ADDRESS (bp1
, begp1
+ i
);
1102 int c2
= *BUF_CHAR_ADDRESS (bp2
, begp2
+ i
);
1109 return make_number (- 1 - i
);
1111 return make_number (i
+ 1);
1114 /* The strings match as far as they go.
1115 If one is shorter, that one is less. */
1117 return make_number (length
+ 1);
1118 else if (length
< len2
)
1119 return make_number (- length
- 1);
1121 /* Same length too => they are equal. */
1122 return make_number (0);
1125 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
1126 Ssubst_char_in_region
, 4, 5, 0,
1127 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
1128 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
1129 and don't mark the buffer as really changed.")
1130 (start
, end
, fromchar
, tochar
, noundo
)
1131 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
1133 register int pos
, stop
, look
;
1136 validate_region (&start
, &end
);
1137 CHECK_NUMBER (fromchar
, 2);
1138 CHECK_NUMBER (tochar
, 3);
1142 look
= XINT (fromchar
);
1144 if (! NILP (noundo
))
1146 if (MODIFF
- 1 == current_buffer
->save_modified
)
1147 current_buffer
->save_modified
++;
1148 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
1149 current_buffer
->auto_save_modified
++;
1154 if (FETCH_CHAR (pos
) == look
)
1158 modify_region (current_buffer
, XINT (start
), stop
);
1163 record_change (pos
, 1);
1164 FETCH_CHAR (pos
) = XINT (tochar
);
1170 signal_after_change (XINT (start
),
1171 stop
- XINT (start
), stop
- XINT (start
));
1176 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
1177 "From START to END, translate characters according to TABLE.\n\
1178 TABLE is a string; the Nth character in it is the mapping\n\
1179 for the character with code N. Returns the number of characters changed.")
1183 register Lisp_Object table
;
1185 register int pos
, stop
; /* Limits of the region. */
1186 register unsigned char *tt
; /* Trans table. */
1187 register int oc
; /* Old character. */
1188 register int nc
; /* New character. */
1189 int cnt
; /* Number of changes made. */
1190 Lisp_Object z
; /* Return. */
1191 int size
; /* Size of translate table. */
1193 validate_region (&start
, &end
);
1194 CHECK_STRING (table
, 2);
1196 size
= XSTRING (table
)->size
;
1197 tt
= XSTRING (table
)->data
;
1201 modify_region (current_buffer
, pos
, stop
);
1204 for (; pos
< stop
; ++pos
)
1206 oc
= FETCH_CHAR (pos
);
1212 record_change (pos
, 1);
1213 FETCH_CHAR (pos
) = nc
;
1214 signal_after_change (pos
, 1, 1);
1224 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
1225 "Delete the text between point and mark.\n\
1226 When called from a program, expects two arguments,\n\
1227 positions (integers or markers) specifying the stretch to be deleted.")
1231 validate_region (&b
, &e
);
1232 del_range (XINT (b
), XINT (e
));
1236 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
1237 "Remove restrictions (narrowing) from current buffer.\n\
1238 This allows the buffer's full text to be seen and edited.")
1242 SET_BUF_ZV (current_buffer
, Z
);
1244 /* Changing the buffer bounds invalidates any recorded current column. */
1245 invalidate_current_column ();
1249 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
1250 "Restrict editing in this buffer to the current region.\n\
1251 The rest of the text becomes temporarily invisible and untouchable\n\
1252 but is not deleted; if you save the buffer in a file, the invisible\n\
1253 text is included in the file. \\[widen] makes all visible again.\n\
1254 See also `save-restriction'.\n\
1256 When calling from a program, pass two arguments; positions (integers\n\
1257 or markers) bounding the text that should remain visible.")
1259 register Lisp_Object b
, e
;
1263 CHECK_NUMBER_COERCE_MARKER (b
, 0);
1264 CHECK_NUMBER_COERCE_MARKER (e
, 1);
1266 if (XINT (b
) > XINT (e
))
1273 if (!(BEG
<= XINT (b
) && XINT (b
) <= XINT (e
) && XINT (e
) <= Z
))
1274 args_out_of_range (b
, e
);
1276 BEGV
= XFASTINT (b
);
1277 SET_BUF_ZV (current_buffer
, XFASTINT (e
));
1278 if (point
< XFASTINT (b
))
1279 SET_PT (XFASTINT (b
));
1280 if (point
> XFASTINT (e
))
1281 SET_PT (XFASTINT (e
));
1283 /* Changing the buffer bounds invalidates any recorded current column. */
1284 invalidate_current_column ();
1289 save_restriction_save ()
1291 register Lisp_Object bottom
, top
;
1292 /* Note: I tried using markers here, but it does not win
1293 because insertion at the end of the saved region
1294 does not advance mh and is considered "outside" the saved region. */
1295 XFASTINT (bottom
) = BEGV
- BEG
;
1296 XFASTINT (top
) = Z
- ZV
;
1298 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
1302 save_restriction_restore (data
)
1305 register struct buffer
*buf
;
1306 register int newhead
, newtail
;
1307 register Lisp_Object tem
;
1309 buf
= XBUFFER (XCONS (data
)->car
);
1311 data
= XCONS (data
)->cdr
;
1313 tem
= XCONS (data
)->car
;
1314 newhead
= XINT (tem
);
1315 tem
= XCONS (data
)->cdr
;
1316 newtail
= XINT (tem
);
1317 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1322 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1323 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1326 /* If point is outside the new visible range, move it inside. */
1328 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1333 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1334 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1335 The buffer's restrictions make parts of the beginning and end invisible.\n\
1336 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1337 This special form, `save-restriction', saves the current buffer's restrictions\n\
1338 when it is entered, and restores them when it is exited.\n\
1339 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1340 The old restrictions settings are restored\n\
1341 even in case of abnormal exit (throw or error).\n\
1343 The value returned is the value of the last form in BODY.\n\
1345 `save-restriction' can get confused if, within the BODY, you widen\n\
1346 and then make changes outside the area within the saved restrictions.\n\
1348 Note: if you are using both `save-excursion' and `save-restriction',\n\
1349 use `save-excursion' outermost:\n\
1350 (save-excursion (save-restriction ...))")
1354 register Lisp_Object val
;
1355 int count
= specpdl_ptr
- specpdl
;
1357 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1358 val
= Fprogn (body
);
1359 return unbind_to (count
, val
);
1362 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
1363 "Print a one-line message at the bottom of the screen.\n\
1364 The first argument is a control string.\n\
1365 It may contain %s or %d or %c to print successive following arguments.\n\
1366 %s means print an argument as a string, %d means print as number in decimal,\n\
1367 %c means print a number as a single character.\n\
1368 The argument used by %s must be a string or a symbol;\n\
1369 the argument used by %d or %c must be a number.\n\
1370 If the first argument is nil, clear any existing message; let the\n\
1371 minibuffer contents show.")
1383 register Lisp_Object val
;
1384 val
= Fformat (nargs
, args
);
1385 message ("%s", XSTRING (val
)->data
);
1390 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
1391 "Format a string out of a control-string and arguments.\n\
1392 The first argument is a control string.\n\
1393 The other arguments are substituted into it to make the result, a string.\n\
1394 It may contain %-sequences meaning to substitute the next argument.\n\
1395 %s means print a string argument. Actually, prints any object, with `princ'.\n\
1396 %d means print as number in decimal (%o octal, %x hex).\n\
1397 %c means print a number as a single character.\n\
1398 %S means print any object as an s-expression (using prin1).\n\
1399 The argument used for %d, %o, %x or %c must be a number.\n\
1400 Use %% to put a single % into the output.")
1403 register Lisp_Object
*args
;
1405 register int n
; /* The number of the next arg to substitute */
1406 register int total
= 5; /* An estimate of the final length */
1408 register unsigned char *format
, *end
;
1410 extern char *index ();
1411 /* It should not be necessary to GCPRO ARGS, because
1412 the caller in the interpreter should take care of that. */
1414 CHECK_STRING (args
[0], 0);
1415 format
= XSTRING (args
[0])->data
;
1416 end
= format
+ XSTRING (args
[0])->size
;
1419 while (format
!= end
)
1420 if (*format
++ == '%')
1424 /* Process a numeric arg and skip it. */
1425 minlen
= atoi (format
);
1430 while ((*format
>= '0' && *format
<= '9')
1431 || *format
== '-' || *format
== ' ' || *format
== '.')
1436 else if (++n
>= nargs
)
1438 else if (*format
== 'S')
1440 /* For `S', prin1 the argument and then treat like a string. */
1441 register Lisp_Object tem
;
1442 tem
= Fprin1_to_string (args
[n
], Qnil
);
1446 else if (XTYPE (args
[n
]) == Lisp_Symbol
)
1448 XSET (args
[n
], Lisp_String
, XSYMBOL (args
[n
])->name
);
1451 else if (XTYPE (args
[n
]) == Lisp_String
)
1454 total
+= XSTRING (args
[n
])->size
;
1456 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
1457 else if (XTYPE (args
[n
]) == Lisp_Int
&& *format
!= 's')
1459 #ifdef LISP_FLOAT_TYPE
1460 /* The following loop assumes the Lisp type indicates
1461 the proper way to pass the argument.
1462 So make sure we have a flonum if the argument should
1464 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
1465 args
[n
] = Ffloat (args
[n
]);
1469 #ifdef LISP_FLOAT_TYPE
1470 else if (XTYPE (args
[n
]) == Lisp_Float
&& *format
!= 's')
1472 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
1473 args
[n
] = Ftruncate (args
[n
]);
1479 /* Anything but a string, convert to a string using princ. */
1480 register Lisp_Object tem
;
1481 tem
= Fprin1_to_string (args
[n
], Qt
);
1488 register int nstrings
= n
+ 1;
1490 /* Allocate twice as many strings as we have %-escapes; floats occupy
1491 two slots, and we're not sure how many of those we have. */
1492 register unsigned char **strings
1493 = (unsigned char **) alloca (2 * nstrings
* sizeof (unsigned char *));
1497 for (n
= 0; n
< nstrings
; n
++)
1500 strings
[i
++] = (unsigned char *) "";
1501 else if (XTYPE (args
[n
]) == Lisp_Int
)
1502 /* We checked above that the corresponding format effector
1503 isn't %s, which would cause MPV. */
1504 strings
[i
++] = (unsigned char *) XINT (args
[n
]);
1505 #ifdef LISP_FLOAT_TYPE
1506 else if (XTYPE (args
[n
]) == Lisp_Float
)
1508 union { double d
; int half
[2]; } u
;
1510 u
.d
= XFLOAT (args
[n
])->data
;
1511 strings
[i
++] = (unsigned char *) u
.half
[0];
1512 strings
[i
++] = (unsigned char *) u
.half
[1];
1516 strings
[i
++] = XSTRING (args
[n
])->data
;
1519 /* Format it in bigger and bigger buf's until it all fits. */
1522 buf
= (char *) alloca (total
+ 1);
1525 length
= doprnt (buf
, total
+ 1, strings
[0], end
, i
-1, strings
+ 1);
1526 if (buf
[total
- 1] == 0)
1534 return make_string (buf
, length
);
1540 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
1541 int arg0
, arg1
, arg2
, arg3
, arg4
;
1555 doprnt (buf
, sizeof buf
, string1
, 0, 5, args
);
1557 doprnt (buf
, sizeof buf
, string1
, 0, 5, &string1
+ 1);
1559 return build_string (buf
);
1562 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
1563 "Return t if two characters match, optionally ignoring case.\n\
1564 Both arguments must be characters (i.e. integers).\n\
1565 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
1567 register Lisp_Object c1
, c2
;
1569 unsigned char *downcase
= DOWNCASE_TABLE
;
1570 CHECK_NUMBER (c1
, 0);
1571 CHECK_NUMBER (c2
, 1);
1573 if (!NILP (current_buffer
->case_fold_search
)
1574 ? (downcase
[0xff & XFASTINT (c1
)] == downcase
[0xff & XFASTINT (c2
)]
1575 && (XFASTINT (c1
) & ~0xff) == (XFASTINT (c2
) & ~0xff))
1576 : XINT (c1
) == XINT (c2
))
1585 staticpro (&Vuser_name
);
1586 staticpro (&Vuser_full_name
);
1587 staticpro (&Vuser_real_name
);
1588 staticpro (&Vsystem_name
);
1590 defsubr (&Schar_equal
);
1591 defsubr (&Sgoto_char
);
1592 defsubr (&Sstring_to_char
);
1593 defsubr (&Schar_to_string
);
1594 defsubr (&Sbuffer_substring
);
1595 defsubr (&Sbuffer_string
);
1597 defsubr (&Spoint_marker
);
1598 defsubr (&Smark_marker
);
1600 defsubr (&Sregion_beginning
);
1601 defsubr (&Sregion_end
);
1602 /* defsubr (&Smark); */
1603 /* defsubr (&Sset_mark); */
1604 defsubr (&Ssave_excursion
);
1606 defsubr (&Sbufsize
);
1607 defsubr (&Spoint_max
);
1608 defsubr (&Spoint_min
);
1609 defsubr (&Spoint_min_marker
);
1610 defsubr (&Spoint_max_marker
);
1616 defsubr (&Sfollowing_char
);
1617 defsubr (&Sprevious_char
);
1618 defsubr (&Schar_after
);
1620 defsubr (&Sinsert_before_markers
);
1621 defsubr (&Sinsert_and_inherit
);
1622 defsubr (&Sinsert_and_inherit_before_markers
);
1623 defsubr (&Sinsert_char
);
1625 defsubr (&Suser_login_name
);
1626 defsubr (&Suser_real_login_name
);
1627 defsubr (&Suser_uid
);
1628 defsubr (&Suser_real_uid
);
1629 defsubr (&Suser_full_name
);
1630 defsubr (&Scurrent_time
);
1631 defsubr (&Scurrent_time_string
);
1632 defsubr (&Scurrent_time_zone
);
1633 defsubr (&Ssystem_name
);
1634 defsubr (&Smessage
);
1637 defsubr (&Sinsert_buffer_substring
);
1638 defsubr (&Scompare_buffer_substrings
);
1639 defsubr (&Ssubst_char_in_region
);
1640 defsubr (&Stranslate_region
);
1641 defsubr (&Sdelete_region
);
1643 defsubr (&Snarrow_to_region
);
1644 defsubr (&Ssave_restriction
);