1 /* Lisp functions pertaining to editing.
2 Copyright (C) 1985,86,87,89,93,94 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 extern void insert_from_buffer ();
42 static long difftm ();
44 /* Some static data, and a function to initialize it for each run */
46 Lisp_Object Vsystem_name
;
47 Lisp_Object Vuser_real_name
; /* login name of current user ID */
48 Lisp_Object Vuser_full_name
; /* full name of current user */
49 Lisp_Object Vuser_name
; /* user name from LOGNAME or USER */
55 register unsigned char *p
, *q
, *r
;
56 struct passwd
*pw
; /* password entry for the current user */
57 extern char *index ();
60 /* Set up system_name even when dumping. */
64 /* Don't bother with this on initial start when just dumping out */
67 #endif /* not CANNOT_DUMP */
69 pw
= (struct passwd
*) getpwuid (getuid ());
71 /* We let the real user name default to "root" because that's quite
72 accurate on MSDOG and because it lets Emacs find the init file.
73 (The DVX libraries override the Djgpp libraries here.) */
74 Vuser_real_name
= build_string (pw
? pw
->pw_name
: "root");
76 Vuser_real_name
= build_string (pw
? pw
->pw_name
: "unknown");
79 /* Get the effective user name, by consulting environment variables,
80 or the effective uid if those are unset. */
81 user_name
= (char *) getenv ("LOGNAME");
84 user_name
= (char *) getenv ("USERNAME"); /* it's USERNAME on NT */
86 user_name
= (char *) getenv ("USER");
87 #endif /* WINDOWSNT */
90 pw
= (struct passwd
*) getpwuid (geteuid ());
91 user_name
= (char *) (pw
? pw
->pw_name
: "unknown");
93 Vuser_name
= build_string (user_name
);
95 /* If the user name claimed in the environment vars differs from
96 the real uid, use the claimed name to find the full name. */
97 tem
= Fstring_equal (Vuser_name
, Vuser_real_name
);
99 pw
= (struct passwd
*) getpwnam (XSTRING (Vuser_name
)->data
);
101 p
= (unsigned char *) (pw
? USER_FULL_NAME
: "unknown");
102 q
= (unsigned char *) index (p
, ',');
103 Vuser_full_name
= make_string (p
, q
? q
- p
: strlen (p
));
105 #ifdef AMPERSAND_FULL_NAME
106 p
= XSTRING (Vuser_full_name
)->data
;
107 q
= (char *) index (p
, '&');
108 /* Substitute the login name for the &, upcasing the first character. */
111 r
= (char *) alloca (strlen (p
) + XSTRING (Vuser_name
)->size
+ 1);
114 strcat (r
, XSTRING (Vuser_name
)->data
);
115 r
[q
- p
] = UPCASE (r
[q
- p
]);
117 Vuser_full_name
= build_string (r
);
119 #endif /* AMPERSAND_FULL_NAME */
122 DEFUN ("char-to-string", Fchar_to_string
, Schar_to_string
, 1, 1, 0,
123 "Convert arg CHAR to a one-character string containing that character.")
131 return make_string (&c
, 1);
134 DEFUN ("string-to-char", Fstring_to_char
, Sstring_to_char
, 1, 1, 0,
135 "Convert arg STRING to a character, the first character of that string.")
137 register Lisp_Object str
;
139 register Lisp_Object val
;
140 register struct Lisp_String
*p
;
141 CHECK_STRING (str
, 0);
145 XSETFASTINT (val
, ((unsigned char *) p
->data
)[0]);
147 XSETFASTINT (val
, 0);
155 register Lisp_Object mark
;
156 mark
= Fmake_marker ();
157 Fset_marker (mark
, make_number (val
), Qnil
);
161 DEFUN ("point", Fpoint
, Spoint
, 0, 0, 0,
162 "Return value of point, as an integer.\n\
163 Beginning of buffer is position (point-min)")
167 XSETFASTINT (temp
, point
);
171 DEFUN ("point-marker", Fpoint_marker
, Spoint_marker
, 0, 0, 0,
172 "Return value of point, as a marker object.")
175 return buildmark (point
);
179 clip_to_bounds (lower
, num
, upper
)
180 int lower
, num
, upper
;
184 else if (num
> upper
)
190 DEFUN ("goto-char", Fgoto_char
, Sgoto_char
, 1, 1, "NGoto char: ",
191 "Set point to POSITION, a number or marker.\n\
192 Beginning of buffer is position (point-min), end is (point-max).")
194 register Lisp_Object n
;
196 CHECK_NUMBER_COERCE_MARKER (n
, 0);
198 SET_PT (clip_to_bounds (BEGV
, XINT (n
), ZV
));
203 region_limit (beginningp
)
206 extern Lisp_Object Vmark_even_if_inactive
; /* Defined in callint.c. */
207 register Lisp_Object m
;
208 if (!NILP (Vtransient_mark_mode
) && NILP (Vmark_even_if_inactive
)
209 && NILP (current_buffer
->mark_active
))
210 Fsignal (Qmark_inactive
, Qnil
);
211 m
= Fmarker_position (current_buffer
->mark
);
212 if (NILP (m
)) error ("There is no region now");
213 if ((point
< XFASTINT (m
)) == beginningp
)
214 return (make_number (point
));
219 DEFUN ("region-beginning", Fregion_beginning
, Sregion_beginning
, 0, 0, 0,
220 "Return position of beginning of region, as an integer.")
223 return (region_limit (1));
226 DEFUN ("region-end", Fregion_end
, Sregion_end
, 0, 0, 0,
227 "Return position of end of region, as an integer.")
230 return (region_limit (0));
233 #if 0 /* now in lisp code */
234 DEFUN ("mark", Fmark
, Smark
, 0, 0, 0,
235 "Return this buffer's mark value as integer, or nil if no mark.\n\
236 If you are using this in an editing command, you are most likely making\n\
237 a mistake; see the documentation of `set-mark'.")
240 return Fmarker_position (current_buffer
->mark
);
242 #endif /* commented out code */
244 DEFUN ("mark-marker", Fmark_marker
, Smark_marker
, 0, 0, 0,
245 "Return this buffer's mark, as a marker object.\n\
246 Watch out! Moving this marker changes the mark position.\n\
247 If you set the marker not to point anywhere, the buffer will have no mark.")
250 return current_buffer
->mark
;
253 #if 0 /* this is now in lisp code */
254 DEFUN ("set-mark", Fset_mark
, Sset_mark
, 1, 1, 0,
255 "Set this buffer's mark to POS. Don't use this function!\n\
256 That is to say, don't use this function unless you want\n\
257 the user to see that the mark has moved, and you want the previous\n\
258 mark position to be lost.\n\
260 Normally, when a new mark is set, the old one should go on the stack.\n\
261 This is why most applications should use push-mark, not set-mark.\n\
263 Novice programmers often try to use the mark for the wrong purposes.\n\
264 The mark saves a location for the user's convenience.\n\
265 Most editing commands should not alter the mark.\n\
266 To remember a location for internal use in the Lisp program,\n\
267 store it in a Lisp variable. Example:\n\
269 (let ((beg (point))) (forward-line 1) (delete-region beg (point))).")
275 current_buffer
->mark
= Qnil
;
278 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
280 if (NILP (current_buffer
->mark
))
281 current_buffer
->mark
= Fmake_marker ();
283 Fset_marker (current_buffer
->mark
, pos
, Qnil
);
286 #endif /* commented-out code */
289 save_excursion_save ()
291 register int visible
= (XBUFFER (XWINDOW (selected_window
)->buffer
)
294 return Fcons (Fpoint_marker (),
295 Fcons (Fcopy_marker (current_buffer
->mark
),
296 Fcons (visible
? Qt
: Qnil
,
297 current_buffer
->mark_active
)));
301 save_excursion_restore (info
)
302 register Lisp_Object info
;
304 register Lisp_Object tem
, tem1
, omark
, nmark
;
306 tem
= Fmarker_buffer (Fcar (info
));
307 /* If buffer being returned to is now deleted, avoid error */
308 /* Otherwise could get error here while unwinding to top level
310 /* In that case, Fmarker_buffer returns nil now. */
316 unchain_marker (tem
);
317 tem
= Fcar (Fcdr (info
));
318 omark
= Fmarker_position (current_buffer
->mark
);
319 Fset_marker (current_buffer
->mark
, tem
, Fcurrent_buffer ());
320 nmark
= Fmarker_position (tem
);
321 unchain_marker (tem
);
322 tem
= Fcdr (Fcdr (info
));
323 #if 0 /* We used to make the current buffer visible in the selected window
324 if that was true previously. That avoids some anomalies.
325 But it creates others, and it wasn't documented, and it is simpler
326 and cleaner never to alter the window/buffer connections. */
329 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
330 Fswitch_to_buffer (Fcurrent_buffer (), Qnil
);
333 tem1
= current_buffer
->mark_active
;
334 current_buffer
->mark_active
= Fcdr (tem
);
335 if (!NILP (Vrun_hooks
))
337 /* If mark is active now, and either was not active
338 or was at a different place, run the activate hook. */
339 if (! NILP (current_buffer
->mark_active
))
341 if (! EQ (omark
, nmark
))
342 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
344 /* If mark has ceased to be active, run deactivate hook. */
345 else if (! NILP (tem1
))
346 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
351 DEFUN ("save-excursion", Fsave_excursion
, Ssave_excursion
, 0, UNEVALLED
, 0,
352 "Save point, mark, and current buffer; execute BODY; restore those things.\n\
353 Executes BODY just like `progn'.\n\
354 The values of point, mark and the current buffer are restored\n\
355 even in case of abnormal exit (throw or error).\n\
356 The state of activation of the mark is also restored.")
360 register Lisp_Object val
;
361 int count
= specpdl_ptr
- specpdl
;
363 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
366 return unbind_to (count
, val
);
369 DEFUN ("buffer-size", Fbufsize
, Sbufsize
, 0, 0, 0,
370 "Return the number of characters in the current buffer.")
374 XSETFASTINT (temp
, Z
- BEG
);
378 DEFUN ("point-min", Fpoint_min
, Spoint_min
, 0, 0, 0,
379 "Return the minimum permissible value of point in the current buffer.\n\
380 This is 1, unless narrowing (a buffer restriction) is in effect.")
384 XSETFASTINT (temp
, BEGV
);
388 DEFUN ("point-min-marker", Fpoint_min_marker
, Spoint_min_marker
, 0, 0, 0,
389 "Return a marker to the minimum permissible value of point in this buffer.\n\
390 This is the beginning, unless narrowing (a buffer restriction) is in effect.")
393 return buildmark (BEGV
);
396 DEFUN ("point-max", Fpoint_max
, Spoint_max
, 0, 0, 0,
397 "Return the maximum permissible value of point in the current buffer.\n\
398 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
399 is in effect, in which case it is less.")
403 XSETFASTINT (temp
, ZV
);
407 DEFUN ("point-max-marker", Fpoint_max_marker
, Spoint_max_marker
, 0, 0, 0,
408 "Return a marker to the maximum permissible value of point in this buffer.\n\
409 This is (1+ (buffer-size)), unless narrowing (a buffer restriction)\n\
410 is in effect, in which case it is less.")
413 return buildmark (ZV
);
416 DEFUN ("following-char", Ffollowing_char
, Sfollowing_char
, 0, 0, 0,
417 "Return the character following point, as a number.\n\
418 At the end of the buffer or accessible region, return 0.")
423 XSETFASTINT (temp
, 0);
425 XSETFASTINT (temp
, FETCH_CHAR (point
));
429 DEFUN ("preceding-char", Fprevious_char
, Sprevious_char
, 0, 0, 0,
430 "Return the character preceding point, as a number.\n\
431 At the beginning of the buffer or accessible region, return 0.")
436 XSETFASTINT (temp
, 0);
438 XSETFASTINT (temp
, FETCH_CHAR (point
- 1));
442 DEFUN ("bobp", Fbobp
, Sbobp
, 0, 0, 0,
443 "Return T if point is at the beginning of the buffer.\n\
444 If the buffer is narrowed, this means the beginning of the narrowed part.")
452 DEFUN ("eobp", Feobp
, Seobp
, 0, 0, 0,
453 "Return T if point is at the end of the buffer.\n\
454 If the buffer is narrowed, this means the end of the narrowed part.")
462 DEFUN ("bolp", Fbolp
, Sbolp
, 0, 0, 0,
463 "Return T if point is at the beginning of a line.")
466 if (point
== BEGV
|| FETCH_CHAR (point
- 1) == '\n')
471 DEFUN ("eolp", Feolp
, Seolp
, 0, 0, 0,
472 "Return T if point is at the end of a line.\n\
473 `End of a line' includes point being at the end of the buffer.")
476 if (point
== ZV
|| FETCH_CHAR (point
) == '\n')
481 DEFUN ("char-after", Fchar_after
, Schar_after
, 1, 1, 0,
482 "Return character in current buffer at position POS.\n\
483 POS is an integer or a buffer pointer.\n\
484 If POS is out of range, the value is nil.")
488 register Lisp_Object val
;
491 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
494 if (n
< BEGV
|| n
>= ZV
) return Qnil
;
496 XSETFASTINT (val
, FETCH_CHAR (n
));
500 DEFUN ("user-login-name", Fuser_login_name
, Suser_login_name
, 0, 1, 0,
501 "Return the name under which the user logged in, as a string.\n\
502 This is based on the effective uid, not the real uid.\n\
503 Also, if the environment variable LOGNAME or USER is set,\n\
504 that determines the value of this function.\n\n\
505 If optional argument UID is an integer, return the login name of the user\n\
506 with that uid, or nil if there is no such user.")
512 /* Set up the user name info if we didn't do it before.
513 (That can happen if Emacs is dumpable
514 but you decide to run `temacs -l loadup' and not dump. */
515 if (INTEGERP (Vuser_name
))
521 CHECK_NUMBER (uid
, 0);
522 pw
= (struct passwd
*) getpwuid (XINT (uid
));
523 return (pw
? build_string (pw
->pw_name
) : Qnil
);
526 DEFUN ("user-real-login-name", Fuser_real_login_name
, Suser_real_login_name
,
528 "Return the name of the user's real uid, as a string.\n\
529 This ignores the environment variables LOGNAME and USER, so it differs from\n\
530 `user-login-name' when running under `su'.")
533 /* Set up the user name info if we didn't do it before.
534 (That can happen if Emacs is dumpable
535 but you decide to run `temacs -l loadup' and not dump. */
536 if (INTEGERP (Vuser_name
))
538 return Vuser_real_name
;
541 DEFUN ("user-uid", Fuser_uid
, Suser_uid
, 0, 0, 0,
542 "Return the effective uid of Emacs, as an integer.")
545 return make_number (geteuid ());
548 DEFUN ("user-real-uid", Fuser_real_uid
, Suser_real_uid
, 0, 0, 0,
549 "Return the real uid of Emacs, as an integer.")
552 return make_number (getuid ());
555 DEFUN ("user-full-name", Fuser_full_name
, Suser_full_name
, 0, 0, 0,
556 "Return the full name of the user logged in, as a string.")
559 return Vuser_full_name
;
562 DEFUN ("system-name", Fsystem_name
, Ssystem_name
, 0, 0, 0,
563 "Return the name of the machine you are running on, as a string.")
569 /* For the benefit of callers who don't want to include lisp.h */
573 return (char *) XSTRING (Vsystem_name
)->data
;
576 DEFUN ("emacs-pid", Femacs_pid
, Semacs_pid
, 0, 0, 0,
577 "Return the process ID of Emacs, as an integer.")
580 return make_number (getpid ());
583 DEFUN ("current-time", Fcurrent_time
, Scurrent_time
, 0, 0, 0,
584 "Return the current time, as the number of seconds since 12:00 AM January 1970.\n\
585 The time is returned as a list of three integers. The first has the\n\
586 most significant 16 bits of the seconds, while the second has the\n\
587 least significant 16 bits. The third integer gives the microsecond\n\
590 The microsecond count is zero on systems that do not provide\n\
591 resolution finer than a second.")
595 Lisp_Object result
[3];
598 XSETINT (result
[0], (EMACS_SECS (t
) >> 16) & 0xffff);
599 XSETINT (result
[1], (EMACS_SECS (t
) >> 0) & 0xffff);
600 XSETINT (result
[2], EMACS_USECS (t
));
602 return Flist (3, result
);
607 lisp_time_argument (specified_time
, result
)
608 Lisp_Object specified_time
;
611 if (NILP (specified_time
))
612 return time (result
) != -1;
615 Lisp_Object high
, low
;
616 high
= Fcar (specified_time
);
617 CHECK_NUMBER (high
, 0);
618 low
= Fcdr (specified_time
);
621 CHECK_NUMBER (low
, 0);
622 *result
= (XINT (high
) << 16) + (XINT (low
) & 0xffff);
623 return *result
>> 16 == XINT (high
);
627 DEFUN ("format-time-string", Fformat_time_string
, Sformat_time_string
, 2, 2, 0,
628 "Use FORMAT-STRING to format the time TIME.\n\
629 TIME is specified as (HIGH LOW . IGNORED) or (HIGH . LOW), as from\n\
630 `current-time' and `file-attributes'.\n\
631 FORMAT-STRING may contain %-sequences to substitute parts of the time.\n\
632 %a is replaced by the abbreviated name of the day of week.\n\
633 %A is replaced by the full name of the day of week.\n\
634 %b is replaced by the abbreviated name of the month.\n\
635 %B is replaced by the full name of the month.\n\
636 %c is a synonym for \"%x %X\".\n\
637 %C is a locale-specific synonym, which defaults to \"%A, %B %e, %Y\" in the C locale.\n\
638 %d is replaced by the day of month, zero-padded.\n\
639 %D is a synonym for \"%m/%d/%y\".\n\
640 %e is replaced by the day of month, blank-padded.\n\
641 %h is a synonym for \"%b\".\n\
642 %H is replaced by the hour (00-23).\n\
643 %I is replaced by the hour (00-12).\n\
644 %j is replaced by the day of the year (001-366).\n\
645 %k is replaced by the hour (0-23), blank padded.\n\
646 %l is replaced by the hour (1-12), blank padded.\n\
647 %m is replaced by the month (01-12).\n\
648 %M is replaced by the minut (00-59).\n\
649 %n is a synonym for \"\\n\".\n\
650 %p is replaced by AM or PM, as appropriate.\n\
651 %r is a synonym for \"%I:%M:%S %p\".\n\
652 %R is a synonym for \"%H:%M\".\n\
653 %S is replaced by the seconds (00-60).\n\
654 %t is a synonym for \"\\t\".\n\
655 %T is a synonym for \"%H:%M:%S\".\n\
656 %U is replaced by the week of the year (01-52), first day of week is Sunday.\n\
657 %w is replaced by the day of week (0-6), Sunday is day 0.\n\
658 %W is replaced by the week of the year (01-52), first day of week is Monday.\n\
659 %x is a locale-specific synonym, which defaults to \"%D\" in the C locale.\n\
660 %X is a locale-specific synonym, which defaults to \"%T\" in the C locale.\n\
661 %y is replaced by the year without century (00-99).\n\
662 %Y is replaced by the year with century.\n\
663 %Z is replaced by the time zone abbreviation.\n\
665 The number of options reflects the strftime(3) function.")
666 (format_string
, time
)
667 Lisp_Object format_string
, time
;
672 CHECK_STRING (format_string
, 1);
674 if (! lisp_time_argument (time
, &value
))
675 error ("Invalid time specification");
677 /* This is probably enough. */
678 size
= XSTRING (format_string
)->size
* 6 + 50;
682 char *buf
= (char *) alloca (size
);
683 if (strftime (buf
, size
, XSTRING (format_string
)->data
,
685 return build_string (buf
);
686 /* If buffer was too small, make it bigger. */
691 DEFUN ("decode-time", Fdecode_time
, Sdecode_time
, 0, 1, 0,
692 "Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE).\n\
693 The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED)\n\
694 or (HIGH . LOW), as from `current-time' and `file-attributes', or `nil'\n\
695 to use the current time. The list has the following nine members:\n\
696 SEC is an integer between 0 and 59. MINUTE is an integer between 0 and 59.\n\
697 HOUR is an integer between 0 and 23. DAY is an integer between 1 and 31.\n\
698 MONTH is an integer between 1 and 12. YEAR is an integer indicating the\n\
699 four-digit year. DOW is the day of week, an integer between 0 and 6, where\n\
700 0 is Sunday. DST is t if daylight savings time is effect, otherwise nil.\n\
701 ZONE is an integer indicating the number of seconds east of Greenwich.\n\
702 (Note that Common Lisp has different meanings for DOW and ZONE.)")
704 Lisp_Object specified_time
;
708 struct tm
*decoded_time
;
709 Lisp_Object list_args
[9];
711 if (! lisp_time_argument (specified_time
, &time_spec
))
712 error ("Invalid time specification");
714 decoded_time
= localtime (&time_spec
);
715 XSETFASTINT (list_args
[0], decoded_time
->tm_sec
);
716 XSETFASTINT (list_args
[1], decoded_time
->tm_min
);
717 XSETFASTINT (list_args
[2], decoded_time
->tm_hour
);
718 XSETFASTINT (list_args
[3], decoded_time
->tm_mday
);
719 XSETFASTINT (list_args
[4], decoded_time
->tm_mon
+ 1);
720 XSETFASTINT (list_args
[5], decoded_time
->tm_year
+ 1900);
721 XSETFASTINT (list_args
[6], decoded_time
->tm_wday
);
722 list_args
[7] = (decoded_time
->tm_isdst
)? Qt
: Qnil
;
724 /* Make a copy, in case gmtime modifies the struct. */
725 save_tm
= *decoded_time
;
726 decoded_time
= gmtime (&time_spec
);
727 if (decoded_time
== 0)
730 XSETINT (list_args
[8], difftm (&save_tm
, decoded_time
));
731 return Flist (9, list_args
);
734 DEFUN ("current-time-string", Fcurrent_time_string
, Scurrent_time_string
, 0, 1, 0,
735 "Return the current time, as a human-readable string.\n\
736 Programs can use this function to decode a time,\n\
737 since the number of columns in each field is fixed.\n\
738 The format is `Sun Sep 16 01:03:52 1973'.\n\
739 If an argument is given, it specifies a time to format\n\
740 instead of the current time. The argument should have the form:\n\
743 (HIGH LOW . IGNORED).\n\
744 Thus, you can use times obtained from `current-time'\n\
745 and from `file-attributes'.")
747 Lisp_Object specified_time
;
753 if (! lisp_time_argument (specified_time
, &value
))
755 tem
= (char *) ctime (&value
);
757 strncpy (buf
, tem
, 24);
760 return build_string (buf
);
763 #define TM_YEAR_ORIGIN 1900
765 /* Yield A - B, measured in seconds. */
770 int ay
= a
->tm_year
+ (TM_YEAR_ORIGIN
- 1);
771 int by
= b
->tm_year
+ (TM_YEAR_ORIGIN
- 1);
772 /* Some compilers can't handle this as a single return statement. */
774 /* difference in day of year */
775 a
->tm_yday
- b
->tm_yday
776 /* + intervening leap days */
777 + ((ay
>> 2) - (by
>> 2))
779 + ((ay
/100 >> 2) - (by
/100 >> 2))
780 /* + difference in years * 365 */
781 + (long)(ay
-by
) * 365
783 return (60*(60*(24*days
+ (a
->tm_hour
- b
->tm_hour
))
784 + (a
->tm_min
- b
->tm_min
))
785 + (a
->tm_sec
- b
->tm_sec
));
788 DEFUN ("current-time-zone", Fcurrent_time_zone
, Scurrent_time_zone
, 0, 1, 0,
789 "Return the offset and name for the local time zone.\n\
790 This returns a list of the form (OFFSET NAME).\n\
791 OFFSET is an integer number of seconds ahead of UTC (east of Greenwich).\n\
792 A negative value means west of Greenwich.\n\
793 NAME is a string giving the name of the time zone.\n\
794 If an argument is given, it specifies when the time zone offset is determined\n\
795 instead of using the current time. The argument should have the form:\n\
798 (HIGH LOW . IGNORED).\n\
799 Thus, you can use times obtained from `current-time'\n\
800 and from `file-attributes'.\n\
802 Some operating systems cannot provide all this information to Emacs;\n\
803 in this case, `current-time-zone' returns a list containing nil for\n\
804 the data it can't find.")
806 Lisp_Object specified_time
;
811 if (lisp_time_argument (specified_time
, &value
)
812 && (t
= gmtime (&value
)) != 0)
818 gmt
= *t
; /* Make a copy, in case localtime modifies *t. */
819 t
= localtime (&value
);
820 offset
= difftm (t
, &gmt
);
824 s
= (char *)t
->tm_zone
;
825 #else /* not HAVE_TM_ZONE */
827 if (t
->tm_isdst
== 0 || t
->tm_isdst
== 1)
828 s
= tzname
[t
->tm_isdst
];
830 #endif /* not HAVE_TM_ZONE */
833 /* No local time zone name is available; use "+-NNNN" instead. */
834 int am
= (offset
< 0 ? -offset
: offset
) / 60;
835 sprintf (buf
, "%c%02d%02d", (offset
< 0 ? '-' : '+'), am
/60, am
%60);
838 return Fcons (make_number (offset
), Fcons (build_string (s
), Qnil
));
841 return Fmake_list (2, Qnil
);
853 /* Callers passing one argument to Finsert need not gcpro the
854 argument "array", since the only element of the array will
855 not be used after calling insert or insert_from_string, so
856 we don't care if it gets trashed. */
858 DEFUN ("insert", Finsert
, Sinsert
, 0, MANY
, 0,
859 "Insert the arguments, either strings or characters, at point.\n\
860 Point moves forward so that it ends up after the inserted text.\n\
861 Any other markers at the point of insertion remain before the text.")
864 register Lisp_Object
*args
;
867 register Lisp_Object tem
;
870 for (argnum
= 0; argnum
< nargs
; argnum
++)
879 else if (STRINGP (tem
))
881 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 0);
885 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
893 DEFUN ("insert-and-inherit", Finsert_and_inherit
, Sinsert_and_inherit
,
895 "Insert the arguments at point, inheriting properties from adjoining text.\n\
896 Point moves forward so that it ends up after the inserted text.\n\
897 Any other markers at the point of insertion remain before the text.")
900 register Lisp_Object
*args
;
903 register Lisp_Object tem
;
906 for (argnum
= 0; argnum
< nargs
; argnum
++)
913 insert_and_inherit (str
, 1);
915 else if (STRINGP (tem
))
917 insert_from_string (tem
, 0, XSTRING (tem
)->size
, 1);
921 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
929 DEFUN ("insert-before-markers", Finsert_before_markers
, Sinsert_before_markers
, 0, MANY
, 0,
930 "Insert strings or characters at point, relocating markers after the text.\n\
931 Point moves forward so that it ends up after the inserted text.\n\
932 Any other markers at the point of insertion also end up after the text.")
935 register Lisp_Object
*args
;
938 register Lisp_Object tem
;
941 for (argnum
= 0; argnum
< nargs
; argnum
++)
948 insert_before_markers (str
, 1);
950 else if (STRINGP (tem
))
952 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 0);
956 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
964 DEFUN ("insert-before-markers-and-inherit",
965 Finsert_and_inherit_before_markers
, Sinsert_and_inherit_before_markers
,
967 "Insert text at point, relocating markers and inheriting properties.\n\
968 Point moves forward so that it ends up after the inserted text.\n\
969 Any other markers at the point of insertion also end up after the text.")
972 register Lisp_Object
*args
;
975 register Lisp_Object tem
;
978 for (argnum
= 0; argnum
< nargs
; argnum
++)
985 insert_before_markers_and_inherit (str
, 1);
987 else if (STRINGP (tem
))
989 insert_from_string_before_markers (tem
, 0, XSTRING (tem
)->size
, 1);
993 tem
= wrong_type_argument (Qchar_or_string_p
, tem
);
1001 DEFUN ("insert-char", Finsert_char
, Sinsert_char
, 2, 3, 0,
1002 "Insert COUNT (second arg) copies of CHAR (first arg).\n\
1003 Point and all markers are affected as in the function `insert'.\n\
1004 Both arguments are required.\n\
1005 The optional third arg INHERIT, if non-nil, says to inherit text properties\n\
1006 from adjoining text, if those properties are sticky.")
1007 (chr
, count
, inherit
)
1008 Lisp_Object chr
, count
, inherit
;
1010 register unsigned char *string
;
1011 register int strlen
;
1014 CHECK_NUMBER (chr
, 0);
1015 CHECK_NUMBER (count
, 1);
1020 strlen
= min (n
, 256);
1021 string
= (unsigned char *) alloca (strlen
);
1022 for (i
= 0; i
< strlen
; i
++)
1023 string
[i
] = XFASTINT (chr
);
1026 if (!NILP (inherit
))
1027 insert_and_inherit (string
, strlen
);
1029 insert (string
, strlen
);
1038 /* Making strings from buffer contents. */
1040 /* Return a Lisp_String containing the text of the current buffer from
1041 START to END. If text properties are in use and the current buffer
1042 has properties in the range specified, the resulting string will also
1045 We don't want to use plain old make_string here, because it calls
1046 make_uninit_string, which can cause the buffer arena to be
1047 compacted. make_string has no way of knowing that the data has
1048 been moved, and thus copies the wrong data into the string. This
1049 doesn't effect most of the other users of make_string, so it should
1050 be left as is. But we should use this function when conjuring
1051 buffer substrings. */
1054 make_buffer_string (start
, end
)
1057 Lisp_Object result
, tem
, tem1
;
1059 if (start
< GPT
&& GPT
< end
)
1062 result
= make_uninit_string (end
- start
);
1063 bcopy (&FETCH_CHAR (start
), XSTRING (result
)->data
, end
- start
);
1065 tem
= Fnext_property_change (make_number (start
), Qnil
, make_number (end
));
1066 tem1
= Ftext_properties_at (make_number (start
), Qnil
);
1068 #ifdef USE_TEXT_PROPERTIES
1069 if (XINT (tem
) != end
|| !NILP (tem1
))
1070 copy_intervals_to_string (result
, current_buffer
, start
, end
- start
);
1076 DEFUN ("buffer-substring", Fbuffer_substring
, Sbuffer_substring
, 2, 2, 0,
1077 "Return the contents of part of the current buffer as a string.\n\
1078 The two arguments START and END are character positions;\n\
1079 they can be in either order.")
1083 register int beg
, end
;
1085 validate_region (&b
, &e
);
1089 return make_buffer_string (beg
, end
);
1092 DEFUN ("buffer-string", Fbuffer_string
, Sbuffer_string
, 0, 0, 0,
1093 "Return the contents of the current buffer as a string.")
1096 return make_buffer_string (BEGV
, ZV
);
1099 DEFUN ("insert-buffer-substring", Finsert_buffer_substring
, Sinsert_buffer_substring
,
1101 "Insert before point a substring of the contents of buffer BUFFER.\n\
1102 BUFFER may be a buffer or a buffer name.\n\
1103 Arguments START and END are character numbers specifying the substring.\n\
1104 They default to the beginning and the end of BUFFER.")
1106 Lisp_Object buf
, b
, e
;
1108 register int beg
, end
, temp
;
1109 register struct buffer
*bp
;
1112 buffer
= Fget_buffer (buf
);
1115 bp
= XBUFFER (buffer
);
1118 beg
= BUF_BEGV (bp
);
1121 CHECK_NUMBER_COERCE_MARKER (b
, 0);
1128 CHECK_NUMBER_COERCE_MARKER (e
, 1);
1133 temp
= beg
, beg
= end
, end
= temp
;
1135 if (!(BUF_BEGV (bp
) <= beg
&& end
<= BUF_ZV (bp
)))
1136 args_out_of_range (b
, e
);
1138 insert_from_buffer (bp
, beg
, end
- beg
, 0);
1142 DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings
, Scompare_buffer_substrings
,
1144 "Compare two substrings of two buffers; return result as number.\n\
1145 the value is -N if first string is less after N-1 chars,\n\
1146 +N if first string is greater after N-1 chars, or 0 if strings match.\n\
1147 Each substring is represented as three arguments: BUFFER, START and END.\n\
1148 That makes six args in all, three for each substring.\n\n\
1149 The value of `case-fold-search' in the current buffer\n\
1150 determines whether case is significant or ignored.")
1151 (buffer1
, start1
, end1
, buffer2
, start2
, end2
)
1152 Lisp_Object buffer1
, start1
, end1
, buffer2
, start2
, end2
;
1154 register int begp1
, endp1
, begp2
, endp2
, temp
, len1
, len2
, length
, i
;
1155 register struct buffer
*bp1
, *bp2
;
1156 register unsigned char *trt
1157 = (!NILP (current_buffer
->case_fold_search
)
1158 ? XSTRING (current_buffer
->case_canon_table
)->data
: 0);
1160 /* Find the first buffer and its substring. */
1163 bp1
= current_buffer
;
1167 buf1
= Fget_buffer (buffer1
);
1170 bp1
= XBUFFER (buf1
);
1174 begp1
= BUF_BEGV (bp1
);
1177 CHECK_NUMBER_COERCE_MARKER (start1
, 1);
1178 begp1
= XINT (start1
);
1181 endp1
= BUF_ZV (bp1
);
1184 CHECK_NUMBER_COERCE_MARKER (end1
, 2);
1185 endp1
= XINT (end1
);
1189 temp
= begp1
, begp1
= endp1
, endp1
= temp
;
1191 if (!(BUF_BEGV (bp1
) <= begp1
1193 && endp1
<= BUF_ZV (bp1
)))
1194 args_out_of_range (start1
, end1
);
1196 /* Likewise for second substring. */
1199 bp2
= current_buffer
;
1203 buf2
= Fget_buffer (buffer2
);
1206 bp2
= XBUFFER (buffer2
);
1210 begp2
= BUF_BEGV (bp2
);
1213 CHECK_NUMBER_COERCE_MARKER (start2
, 4);
1214 begp2
= XINT (start2
);
1217 endp2
= BUF_ZV (bp2
);
1220 CHECK_NUMBER_COERCE_MARKER (end2
, 5);
1221 endp2
= XINT (end2
);
1225 temp
= begp2
, begp2
= endp2
, endp2
= temp
;
1227 if (!(BUF_BEGV (bp2
) <= begp2
1229 && endp2
<= BUF_ZV (bp2
)))
1230 args_out_of_range (start2
, end2
);
1232 len1
= endp1
- begp1
;
1233 len2
= endp2
- begp2
;
1238 for (i
= 0; i
< length
; i
++)
1240 int c1
= *BUF_CHAR_ADDRESS (bp1
, begp1
+ i
);
1241 int c2
= *BUF_CHAR_ADDRESS (bp2
, begp2
+ i
);
1248 return make_number (- 1 - i
);
1250 return make_number (i
+ 1);
1253 /* The strings match as far as they go.
1254 If one is shorter, that one is less. */
1256 return make_number (length
+ 1);
1257 else if (length
< len2
)
1258 return make_number (- length
- 1);
1260 /* Same length too => they are equal. */
1261 return make_number (0);
1264 DEFUN ("subst-char-in-region", Fsubst_char_in_region
,
1265 Ssubst_char_in_region
, 4, 5, 0,
1266 "From START to END, replace FROMCHAR with TOCHAR each time it occurs.\n\
1267 If optional arg NOUNDO is non-nil, don't record this change for undo\n\
1268 and don't mark the buffer as really changed.")
1269 (start
, end
, fromchar
, tochar
, noundo
)
1270 Lisp_Object start
, end
, fromchar
, tochar
, noundo
;
1272 register int pos
, stop
, look
;
1275 validate_region (&start
, &end
);
1276 CHECK_NUMBER (fromchar
, 2);
1277 CHECK_NUMBER (tochar
, 3);
1281 look
= XINT (fromchar
);
1285 if (FETCH_CHAR (pos
) == look
)
1289 modify_region (current_buffer
, XINT (start
), stop
);
1291 if (! NILP (noundo
))
1293 if (MODIFF
- 1 == SAVE_MODIFF
)
1295 if (MODIFF
- 1 == current_buffer
->auto_save_modified
)
1296 current_buffer
->auto_save_modified
++;
1303 record_change (pos
, 1);
1304 FETCH_CHAR (pos
) = XINT (tochar
);
1310 signal_after_change (XINT (start
),
1311 stop
- XINT (start
), stop
- XINT (start
));
1316 DEFUN ("translate-region", Ftranslate_region
, Stranslate_region
, 3, 3, 0,
1317 "From START to END, translate characters according to TABLE.\n\
1318 TABLE is a string; the Nth character in it is the mapping\n\
1319 for the character with code N. Returns the number of characters changed.")
1323 register Lisp_Object table
;
1325 register int pos
, stop
; /* Limits of the region. */
1326 register unsigned char *tt
; /* Trans table. */
1327 register int oc
; /* Old character. */
1328 register int nc
; /* New character. */
1329 int cnt
; /* Number of changes made. */
1330 Lisp_Object z
; /* Return. */
1331 int size
; /* Size of translate table. */
1333 validate_region (&start
, &end
);
1334 CHECK_STRING (table
, 2);
1336 size
= XSTRING (table
)->size
;
1337 tt
= XSTRING (table
)->data
;
1341 modify_region (current_buffer
, pos
, stop
);
1344 for (; pos
< stop
; ++pos
)
1346 oc
= FETCH_CHAR (pos
);
1352 record_change (pos
, 1);
1353 FETCH_CHAR (pos
) = nc
;
1354 signal_after_change (pos
, 1, 1);
1360 XSETFASTINT (z
, cnt
);
1364 DEFUN ("delete-region", Fdelete_region
, Sdelete_region
, 2, 2, "r",
1365 "Delete the text between point and mark.\n\
1366 When called from a program, expects two arguments,\n\
1367 positions (integers or markers) specifying the stretch to be deleted.")
1371 validate_region (&b
, &e
);
1372 del_range (XINT (b
), XINT (e
));
1376 DEFUN ("widen", Fwiden
, Swiden
, 0, 0, "",
1377 "Remove restrictions (narrowing) from current buffer.\n\
1378 This allows the buffer's full text to be seen and edited.")
1382 SET_BUF_ZV (current_buffer
, Z
);
1384 /* Changing the buffer bounds invalidates any recorded current column. */
1385 invalidate_current_column ();
1389 DEFUN ("narrow-to-region", Fnarrow_to_region
, Snarrow_to_region
, 2, 2, "r",
1390 "Restrict editing in this buffer to the current region.\n\
1391 The rest of the text becomes temporarily invisible and untouchable\n\
1392 but is not deleted; if you save the buffer in a file, the invisible\n\
1393 text is included in the file. \\[widen] makes all visible again.\n\
1394 See also `save-restriction'.\n\
1396 When calling from a program, pass two arguments; positions (integers\n\
1397 or markers) bounding the text that should remain visible.")
1399 register Lisp_Object b
, e
;
1401 register EMACS_INT i
;
1403 CHECK_NUMBER_COERCE_MARKER (b
, 0);
1404 CHECK_NUMBER_COERCE_MARKER (e
, 1);
1406 if (XINT (b
) > XINT (e
))
1413 if (!(BEG
<= XINT (b
) && XINT (b
) <= XINT (e
) && XINT (e
) <= Z
))
1414 args_out_of_range (b
, e
);
1416 BEGV
= XFASTINT (b
);
1417 SET_BUF_ZV (current_buffer
, XFASTINT (e
));
1418 if (point
< XFASTINT (b
))
1419 SET_PT (XFASTINT (b
));
1420 if (point
> XFASTINT (e
))
1421 SET_PT (XFASTINT (e
));
1423 /* Changing the buffer bounds invalidates any recorded current column. */
1424 invalidate_current_column ();
1429 save_restriction_save ()
1431 register Lisp_Object bottom
, top
;
1432 /* Note: I tried using markers here, but it does not win
1433 because insertion at the end of the saved region
1434 does not advance mh and is considered "outside" the saved region. */
1435 XSETFASTINT (bottom
, BEGV
- BEG
);
1436 XSETFASTINT (top
, Z
- ZV
);
1438 return Fcons (Fcurrent_buffer (), Fcons (bottom
, top
));
1442 save_restriction_restore (data
)
1445 register struct buffer
*buf
;
1446 register int newhead
, newtail
;
1447 register Lisp_Object tem
;
1449 buf
= XBUFFER (XCONS (data
)->car
);
1451 data
= XCONS (data
)->cdr
;
1453 tem
= XCONS (data
)->car
;
1454 newhead
= XINT (tem
);
1455 tem
= XCONS (data
)->cdr
;
1456 newtail
= XINT (tem
);
1457 if (newhead
+ newtail
> BUF_Z (buf
) - BUF_BEG (buf
))
1462 BUF_BEGV (buf
) = BUF_BEG (buf
) + newhead
;
1463 SET_BUF_ZV (buf
, BUF_Z (buf
) - newtail
);
1466 /* If point is outside the new visible range, move it inside. */
1468 clip_to_bounds (BUF_BEGV (buf
), BUF_PT (buf
), BUF_ZV (buf
)));
1473 DEFUN ("save-restriction", Fsave_restriction
, Ssave_restriction
, 0, UNEVALLED
, 0,
1474 "Execute BODY, saving and restoring current buffer's restrictions.\n\
1475 The buffer's restrictions make parts of the beginning and end invisible.\n\
1476 \(They are set up with `narrow-to-region' and eliminated with `widen'.)\n\
1477 This special form, `save-restriction', saves the current buffer's restrictions\n\
1478 when it is entered, and restores them when it is exited.\n\
1479 So any `narrow-to-region' within BODY lasts only until the end of the form.\n\
1480 The old restrictions settings are restored\n\
1481 even in case of abnormal exit (throw or error).\n\
1483 The value returned is the value of the last form in BODY.\n\
1485 `save-restriction' can get confused if, within the BODY, you widen\n\
1486 and then make changes outside the area within the saved restrictions.\n\
1488 Note: if you are using both `save-excursion' and `save-restriction',\n\
1489 use `save-excursion' outermost:\n\
1490 (save-excursion (save-restriction ...))")
1494 register Lisp_Object val
;
1495 int count
= specpdl_ptr
- specpdl
;
1497 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
1498 val
= Fprogn (body
);
1499 return unbind_to (count
, val
);
1502 /* Buffer for the most recent text displayed by Fmessage. */
1503 static char *message_text
;
1505 /* Allocated length of that buffer. */
1506 static int message_length
;
1508 DEFUN ("message", Fmessage
, Smessage
, 1, MANY
, 0,
1509 "Print a one-line message at the bottom of the screen.\n\
1510 The first argument is a control string.\n\
1511 It may contain %s or %d or %c to print successive following arguments.\n\
1512 %s means print an argument as a string, %d means print as number in decimal,\n\
1513 %c means print a number as a single character.\n\
1514 The argument used by %s must be a string or a symbol;\n\
1515 the argument used by %d or %c must be a number.\n\
1516 If the first argument is nil, clear any existing message; let the\n\
1517 minibuffer contents show.")
1529 register Lisp_Object val
;
1530 val
= Fformat (nargs
, args
);
1531 /* Copy the data so that it won't move when we GC. */
1534 message_text
= (char *)xmalloc (80);
1535 message_length
= 80;
1537 if (XSTRING (val
)->size
> message_length
)
1539 message_length
= XSTRING (val
)->size
;
1540 message_text
= (char *)xrealloc (message_text
, message_length
);
1542 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
1543 message2 (message_text
, XSTRING (val
)->size
);
1548 DEFUN ("message-box", Fmessage_box
, Smessage_box
, 1, MANY
, 0,
1549 "Display a message, in a dialog box if possible.\n\
1550 If a dialog box is not available, use the echo area.\n\
1551 The first argument is a control string.\n\
1552 It may contain %s or %d or %c to print successive following arguments.\n\
1553 %s means print an argument as a string, %d means print as number in decimal,\n\
1554 %c means print a number as a single character.\n\
1555 The argument used by %s must be a string or a symbol;\n\
1556 the argument used by %d or %c must be a number.\n\
1557 If the first argument is nil, clear any existing message; let the\n\
1558 minibuffer contents show.")
1570 register Lisp_Object val
;
1571 val
= Fformat (nargs
, args
);
1574 Lisp_Object pane
, menu
, obj
;
1575 struct gcpro gcpro1
;
1576 pane
= Fcons (Fcons (build_string ("OK"), Qt
), Qnil
);
1578 menu
= Fcons (val
, pane
);
1579 obj
= Fx_popup_dialog (Qt
, menu
);
1584 /* Copy the data so that it won't move when we GC. */
1587 message_text
= (char *)xmalloc (80);
1588 message_length
= 80;
1590 if (XSTRING (val
)->size
> message_length
)
1592 message_length
= XSTRING (val
)->size
;
1593 message_text
= (char *)xrealloc (message_text
, message_length
);
1595 bcopy (XSTRING (val
)->data
, message_text
, XSTRING (val
)->size
);
1596 message2 (message_text
, XSTRING (val
)->size
);
1602 extern Lisp_Object last_nonmenu_event
;
1604 DEFUN ("message-or-box", Fmessage_or_box
, Smessage_or_box
, 1, MANY
, 0,
1605 "Display a message in a dialog box or in the echo area.\n\
1606 If this command was invoked with the mouse, use a dialog box.\n\
1607 Otherwise, use the echo area.\n\
1609 The first argument is a control string.\n\
1610 It may contain %s or %d or %c to print successive following arguments.\n\
1611 %s means print an argument as a string, %d means print as number in decimal,\n\
1612 %c means print a number as a single character.\n\
1613 The argument used by %s must be a string or a symbol;\n\
1614 the argument used by %d or %c must be a number.\n\
1615 If the first argument is nil, clear any existing message; let the\n\
1616 minibuffer contents show.")
1622 if (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
1623 return Fmessage_box (nargs
, args
);
1625 return Fmessage (nargs
, args
);
1628 DEFUN ("format", Fformat
, Sformat
, 1, MANY
, 0,
1629 "Format a string out of a control-string and arguments.\n\
1630 The first argument is a control string.\n\
1631 The other arguments are substituted into it to make the result, a string.\n\
1632 It may contain %-sequences meaning to substitute the next argument.\n\
1633 %s means print a string argument. Actually, prints any object, with `princ'.\n\
1634 %d means print as number in decimal (%o octal, %x hex).\n\
1635 %c means print a number as a single character.\n\
1636 %S means print any object as an s-expression (using prin1).\n\
1637 The argument used for %d, %o, %x or %c must be a number.\n\
1638 Use %% to put a single % into the output.")
1641 register Lisp_Object
*args
;
1643 register int n
; /* The number of the next arg to substitute */
1644 register int total
= 5; /* An estimate of the final length */
1646 register unsigned char *format
, *end
;
1648 extern char *index ();
1649 /* It should not be necessary to GCPRO ARGS, because
1650 the caller in the interpreter should take care of that. */
1652 CHECK_STRING (args
[0], 0);
1653 format
= XSTRING (args
[0])->data
;
1654 end
= format
+ XSTRING (args
[0])->size
;
1657 while (format
!= end
)
1658 if (*format
++ == '%')
1662 /* Process a numeric arg and skip it. */
1663 minlen
= atoi (format
);
1668 while ((*format
>= '0' && *format
<= '9')
1669 || *format
== '-' || *format
== ' ' || *format
== '.')
1674 else if (++n
>= nargs
)
1675 error ("not enough arguments for format string");
1676 else if (*format
== 'S')
1678 /* For `S', prin1 the argument and then treat like a string. */
1679 register Lisp_Object tem
;
1680 tem
= Fprin1_to_string (args
[n
], Qnil
);
1684 else if (SYMBOLP (args
[n
]))
1686 XSETSTRING (args
[n
], XSYMBOL (args
[n
])->name
);
1689 else if (STRINGP (args
[n
]))
1692 if (*format
!= 's' && *format
!= 'S')
1693 error ("format specifier doesn't match argument type");
1694 total
+= XSTRING (args
[n
])->size
;
1696 /* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
1697 else if (INTEGERP (args
[n
]) && *format
!= 's')
1699 #ifdef LISP_FLOAT_TYPE
1700 /* The following loop assumes the Lisp type indicates
1701 the proper way to pass the argument.
1702 So make sure we have a flonum if the argument should
1704 if (*format
== 'e' || *format
== 'f' || *format
== 'g')
1705 args
[n
] = Ffloat (args
[n
]);
1709 #ifdef LISP_FLOAT_TYPE
1710 else if (FLOATP (args
[n
]) && *format
!= 's')
1712 if (! (*format
== 'e' || *format
== 'f' || *format
== 'g'))
1713 args
[n
] = Ftruncate (args
[n
]);
1719 /* Anything but a string, convert to a string using princ. */
1720 register Lisp_Object tem
;
1721 tem
= Fprin1_to_string (args
[n
], Qt
);
1728 register int nstrings
= n
+ 1;
1730 /* Allocate twice as many strings as we have %-escapes; floats occupy
1731 two slots, and we're not sure how many of those we have. */
1732 register unsigned char **strings
1733 = (unsigned char **) alloca (2 * nstrings
* sizeof (unsigned char *));
1737 for (n
= 0; n
< nstrings
; n
++)
1740 strings
[i
++] = (unsigned char *) "";
1741 else if (INTEGERP (args
[n
]))
1742 /* We checked above that the corresponding format effector
1743 isn't %s, which would cause MPV. */
1744 strings
[i
++] = (unsigned char *) XINT (args
[n
]);
1745 #ifdef LISP_FLOAT_TYPE
1746 else if (FLOATP (args
[n
]))
1748 union { double d
; int half
[2]; } u
;
1750 u
.d
= XFLOAT (args
[n
])->data
;
1751 strings
[i
++] = (unsigned char *) u
.half
[0];
1752 strings
[i
++] = (unsigned char *) u
.half
[1];
1756 strings
[i
++] = XSTRING (args
[n
])->data
;
1759 /* Format it in bigger and bigger buf's until it all fits. */
1762 buf
= (char *) alloca (total
+ 1);
1765 length
= doprnt (buf
, total
+ 1, strings
[0], end
, i
-1, strings
+ 1);
1766 if (buf
[total
- 1] == 0)
1774 return make_string (buf
, length
);
1780 format1 (string1
, arg0
, arg1
, arg2
, arg3
, arg4
)
1781 EMACS_INT arg0
, arg1
, arg2
, arg3
, arg4
;
1795 doprnt (buf
, sizeof buf
, string1
, 0, 5, args
);
1797 doprnt (buf
, sizeof buf
, string1
, 0, 5, &string1
+ 1);
1799 return build_string (buf
);
1802 DEFUN ("char-equal", Fchar_equal
, Schar_equal
, 2, 2, 0,
1803 "Return t if two characters match, optionally ignoring case.\n\
1804 Both arguments must be characters (i.e. integers).\n\
1805 Case is ignored if `case-fold-search' is non-nil in the current buffer.")
1807 register Lisp_Object c1
, c2
;
1809 unsigned char *downcase
= DOWNCASE_TABLE
;
1810 CHECK_NUMBER (c1
, 0);
1811 CHECK_NUMBER (c2
, 1);
1813 if (!NILP (current_buffer
->case_fold_search
)
1814 ? (downcase
[0xff & XFASTINT (c1
)] == downcase
[0xff & XFASTINT (c2
)]
1815 && (XFASTINT (c1
) & ~0xff) == (XFASTINT (c2
) & ~0xff))
1816 : XINT (c1
) == XINT (c2
))
1821 /* Transpose the markers in two regions of the current buffer, and
1822 adjust the ones between them if necessary (i.e.: if the regions
1825 Traverses the entire marker list of the buffer to do so, adding an
1826 appropriate amount to some, subtracting from some, and leaving the
1827 rest untouched. Most of this is copied from adjust_markers in insdel.c.
1829 It's the caller's job to see that (start1 <= end1 <= start2 <= end2). */
1832 transpose_markers (start1
, end1
, start2
, end2
)
1833 register int start1
, end1
, start2
, end2
;
1835 register int amt1
, amt2
, diff
, mpos
;
1836 register Lisp_Object marker
;
1838 /* Update point as if it were a marker. */
1842 TEMP_SET_PT (PT
+ (end2
- end1
));
1843 else if (PT
< start2
)
1844 TEMP_SET_PT (PT
+ (end2
- start2
) - (end1
- start1
));
1846 TEMP_SET_PT (PT
- (start2
- start1
));
1848 /* We used to adjust the endpoints here to account for the gap, but that
1849 isn't good enough. Even if we assume the caller has tried to move the
1850 gap out of our way, it might still be at start1 exactly, for example;
1851 and that places it `inside' the interval, for our purposes. The amount
1852 of adjustment is nontrivial if there's a `denormalized' marker whose
1853 position is between GPT and GPT + GAP_SIZE, so it's simpler to leave
1854 the dirty work to Fmarker_position, below. */
1856 /* The difference between the region's lengths */
1857 diff
= (end2
- start2
) - (end1
- start1
);
1859 /* For shifting each marker in a region by the length of the other
1860 * region plus the distance between the regions.
1862 amt1
= (end2
- start2
) + (start2
- end1
);
1863 amt2
= (end1
- start1
) + (start2
- end1
);
1865 for (marker
= BUF_MARKERS (current_buffer
); !NILP (marker
);
1866 marker
= XMARKER (marker
)->chain
)
1868 mpos
= Fmarker_position (marker
);
1869 if (mpos
>= start1
&& mpos
< end2
)
1873 else if (mpos
< start2
)
1877 if (mpos
> GPT
) mpos
+= GAP_SIZE
;
1878 XMARKER (marker
)->bufpos
= mpos
;
1883 DEFUN ("transpose-regions", Ftranspose_regions
, Stranspose_regions
, 4, 5, 0,
1884 "Transpose region START1 to END1 with START2 to END2.\n\
1885 The regions may not be overlapping, because the size of the buffer is\n\
1886 never changed in a transposition.\n\
1888 Optional fifth arg LEAVE_MARKERS, if non-nil, means don't transpose\n\
1889 any markers that happen to be located in the regions.\n\
1891 Transposing beyond buffer boundaries is an error.")
1892 (startr1
, endr1
, startr2
, endr2
, leave_markers
)
1893 Lisp_Object startr1
, endr1
, startr2
, endr2
, leave_markers
;
1895 register int start1
, end1
, start2
, end2
,
1896 gap
, len1
, len_mid
, len2
;
1897 unsigned char *start1_addr
, *start2_addr
, *temp
;
1899 #ifdef USE_TEXT_PROPERTIES
1900 INTERVAL cur_intv
, tmp_interval1
, tmp_interval_mid
, tmp_interval2
;
1901 cur_intv
= BUF_INTERVALS (current_buffer
);
1902 #endif /* USE_TEXT_PROPERTIES */
1904 validate_region (&startr1
, &endr1
);
1905 validate_region (&startr2
, &endr2
);
1907 start1
= XFASTINT (startr1
);
1908 end1
= XFASTINT (endr1
);
1909 start2
= XFASTINT (startr2
);
1910 end2
= XFASTINT (endr2
);
1913 /* Swap the regions if they're reversed. */
1916 register int glumph
= start1
;
1924 len1
= end1
- start1
;
1925 len2
= end2
- start2
;
1928 error ("transposed regions not properly ordered");
1929 else if (start1
== end1
|| start2
== end2
)
1930 error ("transposed region may not be of length 0");
1932 /* The possibilities are:
1933 1. Adjacent (contiguous) regions, or separate but equal regions
1934 (no, really equal, in this case!), or
1935 2. Separate regions of unequal size.
1937 The worst case is usually No. 2. It means that (aside from
1938 potential need for getting the gap out of the way), there also
1939 needs to be a shifting of the text between the two regions. So
1940 if they are spread far apart, we are that much slower... sigh. */
1942 /* It must be pointed out that the really studly thing to do would
1943 be not to move the gap at all, but to leave it in place and work
1944 around it if necessary. This would be extremely efficient,
1945 especially considering that people are likely to do
1946 transpositions near where they are working interactively, which
1947 is exactly where the gap would be found. However, such code
1948 would be much harder to write and to read. So, if you are
1949 reading this comment and are feeling squirrely, by all means have
1950 a go! I just didn't feel like doing it, so I will simply move
1951 the gap the minimum distance to get it out of the way, and then
1952 deal with an unbroken array. */
1954 /* Make sure the gap won't interfere, by moving it out of the text
1955 we will operate on. */
1956 if (start1
< gap
&& gap
< end2
)
1958 if (gap
- start1
< end2
- gap
)
1964 /* Hmmm... how about checking to see if the gap is large
1965 enough to use as the temporary storage? That would avoid an
1966 allocation... interesting. Later, don't fool with it now. */
1968 /* Working without memmove, for portability (sigh), so must be
1969 careful of overlapping subsections of the array... */
1971 if (end1
== start2
) /* adjacent regions */
1973 modify_region (current_buffer
, start1
, end2
);
1974 record_change (start1
, len1
+ len2
);
1976 #ifdef USE_TEXT_PROPERTIES
1977 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
1978 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
1979 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
1980 #endif /* USE_TEXT_PROPERTIES */
1982 /* First region smaller than second. */
1985 /* We use alloca only if it is small,
1986 because we want to avoid stack overflow. */
1988 temp
= (unsigned char *) xmalloc (len2
);
1990 temp
= (unsigned char *) alloca (len2
);
1992 /* Don't precompute these addresses. We have to compute them
1993 at the last minute, because the relocating allocator might
1994 have moved the buffer around during the xmalloc. */
1995 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
1996 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
1998 bcopy (start2_addr
, temp
, len2
);
1999 bcopy (start1_addr
, start1_addr
+ len2
, len1
);
2000 bcopy (temp
, start1_addr
, len2
);
2005 /* First region not smaller than second. */
2008 temp
= (unsigned char *) xmalloc (len1
);
2010 temp
= (unsigned char *) alloca (len1
);
2011 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2012 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2013 bcopy (start1_addr
, temp
, len1
);
2014 bcopy (start2_addr
, start1_addr
, len2
);
2015 bcopy (temp
, start1_addr
+ len2
, len1
);
2019 #ifdef USE_TEXT_PROPERTIES
2020 graft_intervals_into_buffer (tmp_interval1
, start1
+ len2
,
2021 len1
, current_buffer
, 0);
2022 graft_intervals_into_buffer (tmp_interval2
, start1
,
2023 len2
, current_buffer
, 0);
2024 #endif /* USE_TEXT_PROPERTIES */
2026 /* Non-adjacent regions, because end1 != start2, bleagh... */
2030 /* Regions are same size, though, how nice. */
2032 modify_region (current_buffer
, start1
, end1
);
2033 modify_region (current_buffer
, start2
, end2
);
2034 record_change (start1
, len1
);
2035 record_change (start2
, len2
);
2036 #ifdef USE_TEXT_PROPERTIES
2037 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2038 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2039 Fset_text_properties (start1
, end1
, Qnil
, Qnil
);
2040 Fset_text_properties (start2
, end2
, Qnil
, Qnil
);
2041 #endif /* USE_TEXT_PROPERTIES */
2044 temp
= (unsigned char *) xmalloc (len1
);
2046 temp
= (unsigned char *) alloca (len1
);
2047 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2048 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2049 bcopy (start1_addr
, temp
, len1
);
2050 bcopy (start2_addr
, start1_addr
, len2
);
2051 bcopy (temp
, start2_addr
, len1
);
2054 #ifdef USE_TEXT_PROPERTIES
2055 graft_intervals_into_buffer (tmp_interval1
, start2
,
2056 len1
, current_buffer
, 0);
2057 graft_intervals_into_buffer (tmp_interval2
, start1
,
2058 len2
, current_buffer
, 0);
2059 #endif /* USE_TEXT_PROPERTIES */
2062 else if (len1
< len2
) /* Second region larger than first */
2063 /* Non-adjacent & unequal size, area between must also be shifted. */
2065 len_mid
= start2
- end1
;
2066 modify_region (current_buffer
, start1
, end2
);
2067 record_change (start1
, (end2
- start1
));
2068 #ifdef USE_TEXT_PROPERTIES
2069 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2070 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2071 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2072 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2073 #endif /* USE_TEXT_PROPERTIES */
2075 /* holds region 2 */
2077 temp
= (unsigned char *) xmalloc (len2
);
2079 temp
= (unsigned char *) alloca (len2
);
2080 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2081 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2082 bcopy (start2_addr
, temp
, len2
);
2083 bcopy (start1_addr
, start1_addr
+ len_mid
+ len2
, len1
);
2084 safe_bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2085 bcopy (temp
, start1_addr
, len2
);
2088 #ifdef USE_TEXT_PROPERTIES
2089 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2090 len1
, current_buffer
, 0);
2091 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2092 len_mid
, current_buffer
, 0);
2093 graft_intervals_into_buffer (tmp_interval2
, start1
,
2094 len2
, current_buffer
, 0);
2095 #endif /* USE_TEXT_PROPERTIES */
2098 /* Second region smaller than first. */
2100 len_mid
= start2
- end1
;
2101 record_change (start1
, (end2
- start1
));
2102 modify_region (current_buffer
, start1
, end2
);
2104 #ifdef USE_TEXT_PROPERTIES
2105 tmp_interval1
= copy_intervals (cur_intv
, start1
, len1
);
2106 tmp_interval_mid
= copy_intervals (cur_intv
, end1
, len_mid
);
2107 tmp_interval2
= copy_intervals (cur_intv
, start2
, len2
);
2108 Fset_text_properties (start1
, end2
, Qnil
, Qnil
);
2109 #endif /* USE_TEXT_PROPERTIES */
2111 /* holds region 1 */
2113 temp
= (unsigned char *) xmalloc (len1
);
2115 temp
= (unsigned char *) alloca (len1
);
2116 start1_addr
= BUF_CHAR_ADDRESS (current_buffer
, start1
);
2117 start2_addr
= BUF_CHAR_ADDRESS (current_buffer
, start2
);
2118 bcopy (start1_addr
, temp
, len1
);
2119 bcopy (start2_addr
, start1_addr
, len2
);
2120 bcopy (start1_addr
+ len1
, start1_addr
+ len2
, len_mid
);
2121 bcopy (temp
, start1_addr
+ len2
+ len_mid
, len1
);
2124 #ifdef USE_TEXT_PROPERTIES
2125 graft_intervals_into_buffer (tmp_interval1
, end2
- len1
,
2126 len1
, current_buffer
, 0);
2127 graft_intervals_into_buffer (tmp_interval_mid
, start1
+ len2
,
2128 len_mid
, current_buffer
, 0);
2129 graft_intervals_into_buffer (tmp_interval2
, start1
,
2130 len2
, current_buffer
, 0);
2131 #endif /* USE_TEXT_PROPERTIES */
2135 /* todo: this will be slow, because for every transposition, we
2136 traverse the whole friggin marker list. Possible solutions:
2137 somehow get a list of *all* the markers across multiple
2138 transpositions and do it all in one swell phoop. Or maybe modify
2139 Emacs' marker code to keep an ordered list or tree. This might
2140 be nicer, and more beneficial in the long run, but would be a
2141 bunch of work. Plus the way they're arranged now is nice. */
2142 if (NILP (leave_markers
))
2144 transpose_markers (start1
, end1
, start2
, end2
);
2145 fix_overlays_in_range (start1
, end2
);
2155 DEFVAR_LISP ("system-name", &Vsystem_name
,
2156 "The name of the machine Emacs is running on.");
2158 DEFVAR_LISP ("user-full-name", &Vuser_full_name
,
2159 "The full name of the user logged in.");
2161 DEFVAR_LISP ("user-name", &Vuser_name
,
2162 "The user's name, taken from environment variables if possible.");
2164 DEFVAR_LISP ("user-real-name", &Vuser_real_name
,
2165 "The user's name, based upon the real uid only.");
2167 defsubr (&Schar_equal
);
2168 defsubr (&Sgoto_char
);
2169 defsubr (&Sstring_to_char
);
2170 defsubr (&Schar_to_string
);
2171 defsubr (&Sbuffer_substring
);
2172 defsubr (&Sbuffer_string
);
2174 defsubr (&Spoint_marker
);
2175 defsubr (&Smark_marker
);
2177 defsubr (&Sregion_beginning
);
2178 defsubr (&Sregion_end
);
2179 /* defsubr (&Smark); */
2180 /* defsubr (&Sset_mark); */
2181 defsubr (&Ssave_excursion
);
2183 defsubr (&Sbufsize
);
2184 defsubr (&Spoint_max
);
2185 defsubr (&Spoint_min
);
2186 defsubr (&Spoint_min_marker
);
2187 defsubr (&Spoint_max_marker
);
2193 defsubr (&Sfollowing_char
);
2194 defsubr (&Sprevious_char
);
2195 defsubr (&Schar_after
);
2197 defsubr (&Sinsert_before_markers
);
2198 defsubr (&Sinsert_and_inherit
);
2199 defsubr (&Sinsert_and_inherit_before_markers
);
2200 defsubr (&Sinsert_char
);
2202 defsubr (&Suser_login_name
);
2203 defsubr (&Suser_real_login_name
);
2204 defsubr (&Suser_uid
);
2205 defsubr (&Suser_real_uid
);
2206 defsubr (&Suser_full_name
);
2207 defsubr (&Semacs_pid
);
2208 defsubr (&Scurrent_time
);
2209 defsubr (&Sformat_time_string
);
2210 defsubr (&Sdecode_time
);
2211 defsubr (&Scurrent_time_string
);
2212 defsubr (&Scurrent_time_zone
);
2213 defsubr (&Ssystem_name
);
2214 defsubr (&Smessage
);
2215 defsubr (&Smessage_box
);
2216 defsubr (&Smessage_or_box
);
2219 defsubr (&Sinsert_buffer_substring
);
2220 defsubr (&Scompare_buffer_substrings
);
2221 defsubr (&Ssubst_char_in_region
);
2222 defsubr (&Stranslate_region
);
2223 defsubr (&Sdelete_region
);
2225 defsubr (&Snarrow_to_region
);
2226 defsubr (&Ssave_restriction
);
2227 defsubr (&Stranspose_regions
);