/* Lisp functions pertaining to editing.
- Copyright (C) 1985, 1986, 1987, 1989 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1987, 1989, 1993 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include "config.h"
#ifdef VMS
-#include "pwd.h"
+#include "vms-pwd.h"
#else
#include <pwd.h>
#endif
#include "lisp.h"
+#include "intervals.h"
#include "buffer.h"
#include "window.h"
-#ifdef NEED_TIME_H
-#include <time.h>
-#else /* not NEED_TIME_H */
-#ifdef HAVE_TIMEVAL
-#include <sys/time.h>
-#endif /* HAVE_TIMEVAL */
-#endif /* not NEED_TIME_H */
+#include "systime.h"
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
/* If the user name claimed in the environment vars differs from
the real uid, use the claimed name to find the full name. */
tem = Fstring_equal (Vuser_name, Vuser_real_name);
- if (NULL (tem))
+ if (NILP (tem))
pw = (struct passwd *) getpwnam (XSTRING (Vuser_name)->data);
p = (unsigned char *) (pw ? USER_FULL_NAME : "unknown");
int beginningp;
{
register Lisp_Object m;
+ if (!NILP (Vtransient_mark_mode) && NILP (current_buffer->mark_active))
+ error ("There is no region now");
m = Fmarker_position (current_buffer->mark);
- if (NULL (m)) error ("There is no region now");
+ if (NILP (m)) error ("There is no region now");
if ((point < XFASTINT (m)) == beginningp)
return (make_number (point));
else
(pos)
Lisp_Object pos;
{
- if (NULL (pos))
+ if (NILP (pos))
{
current_buffer->mark = Qnil;
return Qnil;
}
CHECK_NUMBER_COERCE_MARKER (pos, 0);
- if (NULL (current_buffer->mark))
+ if (NILP (current_buffer->mark))
current_buffer->mark = Fmake_marker ();
Fset_marker (current_buffer->mark, pos, Qnil);
Lisp_Object
save_excursion_save ()
{
- register int visible = XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer;
+ register int visible = (XBUFFER (XWINDOW (selected_window)->buffer)
+ == current_buffer);
return Fcons (Fpoint_marker (),
- Fcons (Fcopy_marker (current_buffer->mark), visible ? Qt : Qnil));
+ Fcons (Fcopy_marker (current_buffer->mark),
+ Fcons (visible ? Qt : Qnil,
+ current_buffer->mark_active)));
}
Lisp_Object
save_excursion_restore (info)
register Lisp_Object info;
{
- register Lisp_Object tem;
+ register Lisp_Object tem, tem1;
tem = Fmarker_buffer (Fcar (info));
/* If buffer being returned to is now deleted, avoid error */
/* Otherwise could get error here while unwinding to top level
and crash */
/* In that case, Fmarker_buffer returns nil now. */
- if (NULL (tem))
+ if (NILP (tem))
return Qnil;
Fset_buffer (tem);
tem = Fcar (info);
Fset_marker (current_buffer->mark, tem, Fcurrent_buffer ());
unchain_marker (tem);
tem = Fcdr (Fcdr (info));
- if (!NULL (tem) && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer))
+ tem1 = Fcar (tem);
+ if (!NILP (tem1)
+ && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer))
Fswitch_to_buffer (Fcurrent_buffer (), Qnil);
+
+ tem1 = current_buffer->mark_active;
+ current_buffer->mark_active = Fcdr (tem);
+ if (! NILP (current_buffer->mark_active))
+ call1 (Vrun_hooks, intern ("activate-mark-hook"));
+ else if (! NILP (tem1))
+ call1 (Vrun_hooks, intern ("deactivate-mark-hook"));
return Qnil;
}
"Save point, mark, and current buffer; execute BODY; restore those things.\n\
Executes BODY just like `progn'.\n\
The values of point, mark and the current buffer are restored\n\
-even in case of abnormal exit (throw or error).")
+even in case of abnormal exit (throw or error).\n\
+The state of activation of the mark is also restored.")
(args)
Lisp_Object args;
{
return buildmark (ZV);
}
-DEFUN ("following-char", Ffollchar, Sfollchar, 0, 0, 0,
- "Return the character following point, as a number.")
+DEFUN ("following-char", Ffollowing_char, Sfollowing_char, 0, 0, 0,
+ "Return the character following point, as a number.\n\
+At the end of the buffer or accessible region, return 0.")
()
{
Lisp_Object temp;
- XFASTINT (temp) = FETCH_CHAR (point);
+ if (point >= ZV)
+ XFASTINT (temp) = 0;
+ else
+ XFASTINT (temp) = FETCH_CHAR (point);
return temp;
}
-DEFUN ("preceding-char", Fprevchar, Sprevchar, 0, 0, 0,
- "Return the character preceding point, as a number.")
+DEFUN ("preceding-char", Fprevious_char, Sprevious_char, 0, 0, 0,
+ "Return the character preceding point, as a number.\n\
+At the beginning of the buffer or accessible region, return 0.")
()
{
Lisp_Object temp;
return Vsystem_name;
}
-DEFUN ("current-time-string", Fcurrent_time_string, Scurrent_time_string, 0, 0, 0,
+DEFUN ("current-time", Fcurrent_time, Scurrent_time, 0, 0, 0,
+ "Return the current time, as the number of seconds since 12:00 AM January 1970.\n\
+The time is returned as a list of three integers. The first has the\n\
+most significant 16 bits of the seconds, while the second has the\n\
+least significant 16 bits. The third integer gives the microsecond\n\
+count.\n\
+\n\
+The microsecond count is zero on systems that do not provide\n\
+resolution finer than a second.")
+ ()
+{
+ EMACS_TIME t;
+ Lisp_Object result[3];
+
+ EMACS_GET_TIME (t);
+ XSET (result[0], Lisp_Int, (EMACS_SECS (t) >> 16) & 0xffff);
+ XSET (result[1], Lisp_Int, (EMACS_SECS (t) >> 0) & 0xffff);
+ XSET (result[2], Lisp_Int, EMACS_USECS (t));
+
+ return Flist (3, result);
+}
+\f
+
+DEFUN ("current-time-string", Fcurrent_time_string, Scurrent_time_string, 0, 1, 0,
"Return the current time, as a human-readable string.\n\
-Programs can use it too, since the number of columns in each field is fixed.\n\
+Programs can use this function to decode a time,\n\
+since the number of columns in each field is fixed.\n\
The format is `Sun Sep 16 01:03:52 1973'.\n\
-In a future Emacs version, the time zone may be added at the end,\n\
-if we can figure out a reasonably easy way to get that information.")
- ()
+If an argument is given, it specifies a time to format\n\
+instead of the current time. The argument should have the form:\n\
+ (HIGH . LOW)\n\
+or the form:\n\
+ (HIGH LOW . IGNORED).\n\
+Thus, you can use times obtained from `current-time'\n\
+and from `file-attributes'.")
+ (specified_time)
+ Lisp_Object specified_time;
{
- long current_time = time ((long *) 0);
+ long value;
char buf[30];
- register char *tem = (char *) ctime (¤t_time);
+ register char *tem;
+
+ if (NILP (specified_time))
+ value = time ((long *) 0);
+ else
+ {
+ Lisp_Object high, low;
+ high = Fcar (specified_time);
+ CHECK_NUMBER (high, 0);
+ low = Fcdr (specified_time);
+ if (XTYPE (low) == Lisp_Cons)
+ low = Fcar (low);
+ CHECK_NUMBER (low, 0);
+ value = ((XINT (high) << 16) + (XINT (low) & 0xffff));
+ }
+
+ tem = (char *) ctime (&value);
strncpy (buf, tem, 24);
buf[24] = 0;
return build_string (buf);
}
-#ifdef unix
-
-DEFUN ("set-default-file-mode", Fset_default_file_mode, Sset_default_file_mode, 1, 1, "p",
- "Set Unix `umask' value to ARGUMENT, and return old value.\n\
-The `umask' value is the default protection mode for new files.")
- (nmask)
- Lisp_Object nmask;
-{
- CHECK_NUMBER (nmask, 0);
- return make_number (umask (XINT (nmask)));
-}
-
-DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "",
- "Tell Unix to finish all pending disk updates.")
+DEFUN ("current-time-zone", Fcurrent_time_zone, Scurrent_time_zone, 0, 0, 0,
+ "Return the offset, savings state, and names for the current time zone.\n\
+This returns a list of the form (OFFSET SAVINGS-FLAG STANDARD SAVINGS).\n\
+OFFSET is an integer specifying how many minutes east of Greenwich the\n\
+ current time zone is located. A negative value means west of\n\
+ Greenwich. Note that this describes the standard time; if daylight\n\
+ savings time is in effect, it does not affect this value.\n\
+SAVINGS-FLAG is non-nil iff daylight savings time or some other sort\n\
+ of seasonal time adjustment is in effect.\n\
+STANDARD is a string giving the name of the time zone when no seasonal\n\
+ time adjustment is in effect.\n\
+SAVINGS is a string giving the name of the time zone when there is a\n\
+ seasonal time adjustment in effect.\n\
+If the local area does not use a seasonal time adjustment,\n\
+SAVINGS-FLAG is always nil, and STANDARD and SAVINGS are equal.\n\
+\n\
+Some operating systems cannot provide all this information to Emacs;\n\
+in this case, current-time-zone will return a list containing nil for\n\
+the data it can't find.")
()
{
- sync ();
- return Qnil;
+#ifdef EMACS_CURRENT_TIME_ZONE
+ int offset, savings_flag;
+ char standard[11];
+ char savings[11];
+
+ EMACS_CURRENT_TIME_ZONE (&offset, &savings_flag, standard, savings);
+
+ return Fcons (make_number (offset),
+ Fcons ((savings_flag ? Qt : Qnil),
+ Fcons (build_string (standard),
+ Fcons (build_string (savings),
+ Qnil))));
+#else
+ return Fmake_list (4, Qnil);
+#endif
}
-#endif /* unix */
\f
void
insert1 (arg)
}
\f
-/* Return a string with the contents of the current region */
+/* Making strings from buffer contents. */
+
+/* Return a Lisp_String containing the text of the current buffer from
+ START to END. If text properties are in use and the current buffer
+ has properties in the range specifed, the resulting string will also
+ have them.
+
+ We don't want to use plain old make_string here, because it calls
+ make_uninit_string, which can cause the buffer arena to be
+ compacted. make_string has no way of knowing that the data has
+ been moved, and thus copies the wrong data into the string. This
+ doesn't effect most of the other users of make_string, so it should
+ be left as is. But we should use this function when conjuring
+ buffer substrings. */
+
+Lisp_Object
+make_buffer_string (start, end)
+ int start, end;
+{
+ Lisp_Object result;
+
+ if (start < GPT && GPT < end)
+ move_gap (start);
+
+ result = make_uninit_string (end - start);
+ bcopy (&FETCH_CHAR (start), XSTRING (result)->data, end - start);
+
+ /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
+ copy_intervals_to_string (result, current_buffer, start, end - start);
+
+ return result;
+}
DEFUN ("buffer-substring", Fbuffer_substring, Sbuffer_substring, 2, 2, 0,
"Return the contents of part of the current buffer as a string.\n\
Lisp_Object b, e;
{
register int beg, end;
- Lisp_Object result;
validate_region (&b, &e);
beg = XINT (b);
end = XINT (e);
- if (beg < GPT && end > GPT)
- move_gap (beg);
-
- /* Plain old make_string calls make_uninit_string, which can cause
- the buffer arena to be compacted. make_string has no way of
- knowing that the data has been moved, and thus copies the wrong
- data into the string. This doesn't effect most of the other
- users of make_string, so it should be left as is. */
- result = make_uninit_string (end - beg);
- bcopy (&FETCH_CHAR (beg), XSTRING (result)->data, end - beg);
-
- return result;
+ return make_buffer_string (beg, end);
}
DEFUN ("buffer-string", Fbuffer_string, Sbuffer_string, 0, 0, 0,
"Return the contents of the current buffer as a string.")
()
{
- if (BEGV < GPT && ZV > GPT)
- move_gap (BEGV);
- return make_string (BEGV_ADDR, ZV - BEGV);
+ return make_buffer_string (BEGV, ZV);
}
DEFUN ("insert-buffer-substring", Finsert_buffer_substring, Sinsert_buffer_substring,
(buf, b, e)
Lisp_Object buf, b, e;
{
- register int beg, end, exch;
+ register int beg, end, temp, len, opoint, start;
register struct buffer *bp;
+ Lisp_Object buffer;
- buf = Fget_buffer (buf);
- bp = XBUFFER (buf);
+ buffer = Fget_buffer (buf);
+ if (NILP (buffer))
+ nsberror (buf);
+ bp = XBUFFER (buffer);
- if (NULL (b))
+ if (NILP (b))
beg = BUF_BEGV (bp);
else
{
CHECK_NUMBER_COERCE_MARKER (b, 0);
beg = XINT (b);
}
- if (NULL (e))
+ if (NILP (e))
end = BUF_ZV (bp);
else
{
}
if (beg > end)
- exch = beg, beg = end, end = exch;
+ temp = beg, beg = end, end = temp;
/* Move the gap or create enough gap in the current buffer. */
if (GAP_SIZE < end - beg)
make_gap (end - beg - GAP_SIZE);
+ len = end - beg;
+ start = beg;
+ opoint = point;
+
if (!(BUF_BEGV (bp) <= beg
&& beg <= end
&& end <= BUF_ZV (bp)))
if (beg < end)
insert (BUF_CHAR_ADDRESS (bp, beg), end - beg);
+ /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
+ graft_intervals_into_buffer (copy_intervals (bp->intervals, start, len),
+ opoint, bp);
+
return Qnil;
}
+
+DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings, Scompare_buffer_substrings,
+ 6, 6, 0,
+ "Compare two substrings of two buffers; return result as number.\n\
+the value is -N if first string is less after N-1 chars,\n\
++N if first string is greater after N-1 chars, or 0 if strings match.\n\
+Each substring is represented as three arguments: BUFFER, START and END.\n\
+That makes six args in all, three for each substring.\n\n\
+The value of `case-fold-search' in the current buffer\n\
+determines whether case is significant or ignored.")
+ (buffer1, start1, end1, buffer2, start2, end2)
+ Lisp_Object buffer1, start1, end1, buffer2, start2, end2;
+{
+ register int begp1, endp1, begp2, endp2, temp, len1, len2, length, i;
+ register struct buffer *bp1, *bp2;
+ register unsigned char *trt
+ = (!NILP (current_buffer->case_fold_search)
+ ? XSTRING (current_buffer->case_canon_table)->data : 0);
+
+ /* Find the first buffer and its substring. */
+
+ if (NILP (buffer1))
+ bp1 = current_buffer;
+ else
+ {
+ Lisp_Object buf1;
+ buf1 = Fget_buffer (buffer1);
+ if (NILP (buf1))
+ nsberror (buffer1);
+ bp1 = XBUFFER (buf1);
+ }
+
+ if (NILP (start1))
+ begp1 = BUF_BEGV (bp1);
+ else
+ {
+ CHECK_NUMBER_COERCE_MARKER (start1, 1);
+ begp1 = XINT (start1);
+ }
+ if (NILP (end1))
+ endp1 = BUF_ZV (bp1);
+ else
+ {
+ CHECK_NUMBER_COERCE_MARKER (end1, 2);
+ endp1 = XINT (end1);
+ }
+
+ if (begp1 > endp1)
+ temp = begp1, begp1 = endp1, endp1 = temp;
+
+ if (!(BUF_BEGV (bp1) <= begp1
+ && begp1 <= endp1
+ && endp1 <= BUF_ZV (bp1)))
+ args_out_of_range (start1, end1);
+
+ /* Likewise for second substring. */
+
+ if (NILP (buffer2))
+ bp2 = current_buffer;
+ else
+ {
+ Lisp_Object buf2;
+ buf2 = Fget_buffer (buffer2);
+ if (NILP (buf2))
+ nsberror (buffer2);
+ bp2 = XBUFFER (buffer2);
+ }
+
+ if (NILP (start2))
+ begp2 = BUF_BEGV (bp2);
+ else
+ {
+ CHECK_NUMBER_COERCE_MARKER (start2, 4);
+ begp2 = XINT (start2);
+ }
+ if (NILP (end2))
+ endp2 = BUF_ZV (bp2);
+ else
+ {
+ CHECK_NUMBER_COERCE_MARKER (end2, 5);
+ endp2 = XINT (end2);
+ }
+
+ if (begp2 > endp2)
+ temp = begp2, begp2 = endp2, endp2 = temp;
+
+ if (!(BUF_BEGV (bp2) <= begp2
+ && begp2 <= endp2
+ && endp2 <= BUF_ZV (bp2)))
+ args_out_of_range (start2, end2);
+
+ len1 = endp1 - begp1;
+ len2 = endp2 - begp2;
+ length = len1;
+ if (len2 < length)
+ length = len2;
+
+ for (i = 0; i < length; i++)
+ {
+ int c1 = *BUF_CHAR_ADDRESS (bp1, begp1 + i);
+ int c2 = *BUF_CHAR_ADDRESS (bp2, begp2 + i);
+ if (trt)
+ {
+ c1 = trt[c1];
+ c2 = trt[c2];
+ }
+ if (c1 < c2)
+ return make_number (- 1 - i);
+ if (c1 > c2)
+ return make_number (i + 1);
+ }
+
+ /* The strings match as far as they go.
+ If one is shorter, that one is less. */
+ if (length < len1)
+ return make_number (length + 1);
+ else if (length < len2)
+ return make_number (- length - 1);
+
+ /* Same length too => they are equal. */
+ return make_number (0);
+}
\f
DEFUN ("subst-char-in-region", Fsubst_char_in_region,
Ssubst_char_in_region, 4, 5, 0,
stop = XINT (end);
look = XINT (fromchar);
- modify_region (pos, stop);
- if (! NULL (noundo))
+ modify_region (current_buffer, pos, stop);
+ if (! NILP (noundo))
{
if (MODIFF - 1 == current_buffer->save_modified)
current_buffer->save_modified++;
{
if (FETCH_CHAR (pos) == look)
{
- if (NULL (noundo))
+ if (NILP (noundo))
record_change (pos, 1);
FETCH_CHAR (pos) = XINT (tochar);
- if (NULL (noundo))
+ if (NILP (noundo))
signal_after_change (pos, 1, 1);
}
pos++;
pos = XINT (start);
stop = XINT (end);
- modify_region (pos, stop);
+ modify_region (current_buffer, pos, stop);
cnt = 0;
for (; pos < stop; ++pos)
%s means print an argument as a string, %d means print as number in decimal,\n\
%c means print a number as a single character.\n\
The argument used by %s must be a string or a symbol;\n\
-the argument used by %d or %c must be a number.")
+the argument used by %d or %c must be a number.\n\
+If the first argument is nil, clear any existing message; let the\n\
+minibuffer contents show.")
(nargs, args)
int nargs;
Lisp_Object *args;
{
- register Lisp_Object val;
-
-#ifdef MULTI_SCREEN
- extern Lisp_Object Vglobal_minibuffer_screen;
-
- if (XTYPE (Vglobal_minibuffer_screen) == Lisp_Screen)
- Fmake_screen_visible (Vglobal_minibuffer_screen);
-#endif
-
- val = Fformat (nargs, args);
- message ("%s", XSTRING (val)->data);
- return val;
+ if (NILP (args[0]))
+ {
+ message (0);
+ return Qnil;
+ }
+ else
+ {
+ register Lisp_Object val;
+ val = Fformat (nargs, args);
+ message ("%s", XSTRING (val)->data);
+ return val;
+ }
}
DEFUN ("format", Fformat, Sformat, 1, MANY, 0,
/* Would get MPV otherwise, since Lisp_Int's `point' to low memory. */
else if (XTYPE (args[n]) == Lisp_Int && *format != 's')
{
+#ifdef LISP_FLOAT_TYPE
/* The following loop issumes the Lisp type indicates
the proper way to pass the argument.
So make sure we have a flonum if the argument should
be a double. */
if (*format == 'e' || *format == 'f' || *format == 'g')
args[n] = Ffloat (args[n]);
+#endif
total += 10;
}
+#ifdef LISP_FLOAT_TYPE
else if (XTYPE (args[n]) == Lisp_Float && *format != 's')
{
if (! (*format == 'e' || *format == 'f' || *format == 'g'))
args[n] = Ftruncate (args[n]);
total += 20;
}
+#endif
else
{
/* Anything but a string, convert to a string using princ. */
/* We checked above that the corresponding format effector
isn't %s, which would cause MPV. */
strings[n] = (unsigned char *) XINT (args[n]);
+#ifdef LISP_FLOAT_TYPE
else if (XTYPE (args[n]) == Lisp_Float)
{
union { double d; int half[2]; } u;
strings[n++] = (unsigned char *) u.half[0];
strings[n] = (unsigned char *) u.half[1];
}
+#endif
else
strings[n] = XSTRING (args[n])->data;
}
CHECK_NUMBER (c1, 0);
CHECK_NUMBER (c2, 1);
- if (!NULL (current_buffer->case_fold_search)
- ? downcase[0xff & XFASTINT (c1)] == downcase[0xff & XFASTINT (c2)]
+ if (!NILP (current_buffer->case_fold_search)
+ ? (downcase[0xff & XFASTINT (c1)] == downcase[0xff & XFASTINT (c2)]
+ && (XFASTINT (c1) & ~0xff) == (XFASTINT (c2) & ~0xff))
: XINT (c1) == XINT (c2))
return Qt;
return Qnil;
}
-#ifndef MAINTAIN_ENVIRONMENT /* it is done in environ.c in that case */
-DEFUN ("getenv", Fgetenv, Sgetenv, 1, 2, 0,
- "Return the value of environment variable VAR, as a string.\n\
-VAR should be a string. Value is nil if VAR is undefined in the environment.")
- (str)
- Lisp_Object str;
-{
- register char *val;
- CHECK_STRING (str, 0);
- val = (char *) egetenv (XSTRING (str)->data);
- if (!val)
- return Qnil;
- return build_string (val);
-}
-#endif /* MAINTAIN_ENVIRONMENT */
\f
void
syms_of_editfns ()
defsubr (&Seobp);
defsubr (&Sbolp);
defsubr (&Seolp);
- defsubr (&Sfollchar);
- defsubr (&Sprevchar);
+ defsubr (&Sfollowing_char);
+ defsubr (&Sprevious_char);
defsubr (&Schar_after);
defsubr (&Sinsert);
defsubr (&Sinsert_before_markers);
defsubr (&Suser_uid);
defsubr (&Suser_real_uid);
defsubr (&Suser_full_name);
+ defsubr (&Scurrent_time);
defsubr (&Scurrent_time_string);
+ defsubr (&Scurrent_time_zone);
defsubr (&Ssystem_name);
- defsubr (&Sset_default_file_mode);
- defsubr (&Sunix_sync);
defsubr (&Smessage);
defsubr (&Sformat);
-#ifndef MAINTAIN_ENVIRONMENT /* in environ.c */
- defsubr (&Sgetenv);
-#endif
defsubr (&Sinsert_buffer_substring);
+ defsubr (&Scompare_buffer_substrings);
defsubr (&Ssubst_char_in_region);
defsubr (&Stranslate_region);
defsubr (&Sdelete_region);