CVS update by aidan xemacs/src ...
xemacs-cvs at xemacs.org
xemacs-cvs at xemacs.org
Tue Oct 2 15:31:34 EDT 2007
User: aidan
Date: 07/10/02 21:31:34
Modified: xemacs/src ChangeLog editfns.c strftime.c
Log:
Synch up format-time-string % specifiers with Emacs 21.3.1, from Shyamal Prasad.
Revision Changes Path
1.1099 +13 -0 XEmacs/xemacs/src/ChangeLog
Index: ChangeLog
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/src/ChangeLog,v
retrieving revision 1.1098
retrieving revision 1.1099
diff -u -p -r1.1098 -r1.1099
--- ChangeLog 2007/10/01 08:07:51 1.1098
+++ ChangeLog 2007/10/02 19:31:30 1.1099
@@ -1,3 +1,16 @@
+2004-12-08 Shyamal Prasad <shyamal at member.fsf.org>
+
+ * editfns.c:
+ * editfns.c (Fformat_time_string):
+ Added documentation for %z, %g, %G and %V specifiers. This synchs
+ up the set of % specifiers for format-time-string with Emacs
+ 21.3.1. Make copy of static buffer returned by localtime().
+
+ * strftime.c:
+ * strftime.c (strftime):
+ Implemented %z, %g, %G and %V in a style similar to existing
+ implementation of other specifiers.
+
2007-09-30 Stephen J. Turnbull <stephen at xemacs.org>
* search.c (Freplace_match): Improve range-checking on STRBUFFER.
1.54 +8 -2 XEmacs/xemacs/src/editfns.c
Index: editfns.c
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/src/editfns.c,v
retrieving revision 1.53
retrieving revision 1.54
diff -u -p -r1.53 -r1.54
--- editfns.c 2005/07/17 20:08:47 1.53
+++ editfns.c 2007/10/02 19:31:31 1.54
@@ -1015,6 +1015,8 @@ FORMAT-STRING may contain %-sequences to
%d is replaced by the day of month, zero-padded.
%D is a synonym for "%m/%d/%y".
%e is replaced by the day of month, blank-padded.
+%G is replaced by the year containing the ISO 8601 week
+%g is replaced by the year of the ISO 8601 week within the century (00-99)
%h is a synonym for "%b".
%H is replaced by the hour (00-23).
%I is replaced by the hour (00-12).
@@ -1033,12 +1035,14 @@ FORMAT-STRING may contain %-sequences to
%t is a synonym for "\\t".
%T is a synonym for "%H:%M:%S".
%U is replaced by the week of the year (00-53), first day of week is Sunday.
+%V is replaced by the ISO 8601 week number
%w is replaced by the day of week (0-6), Sunday is day 0.
%W is replaced by the week of the year (00-53), first day of week is Monday.
%x is a locale-specific synonym, which defaults to "%D" in the C locale.
%X is a locale-specific synonym, which defaults to "%T" in the C locale.
%y is replaced by the year without century (00-99).
%Y is replaced by the year with century.
+%z is replaced by the time zone as a numeric offset (e.g +0530, -0800 etc.)
%Z is replaced by the time zone abbreviation.
The number of options reflects the `strftime' function.
@@ -1063,13 +1067,15 @@ characters appearing in the day and mont
{
Extbyte *buf = alloca_extbytes (size);
Extbyte *formext;
+ /* make a copy of the static buffer returned by localtime() */
+ struct tm tm = * localtime(&value);
+
*buf = 1;
/* !!#### this use of external here is not totally safe, and
potentially data lossy. */
LISP_STRING_TO_EXTERNAL (format_string, formext, Qnative);
- if (emacs_strftime (buf, size, formext,
- localtime (&value))
+ if (emacs_strftime (buf, size, formext, &tm)
|| !*buf)
return build_ext_string (buf, Qnative);
/* If buffer was too small, make it bigger. */
1.8 +143 -0 XEmacs/xemacs/src/strftime.c
Index: strftime.c
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/src/strftime.c,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -p -r1.7 -r1.8
--- strftime.c 2005/01/24 23:34:10 1.7
+++ strftime.c 2007/10/02 19:31:31 1.8
@@ -58,6 +58,7 @@
%S second (00..61)
%T time, 24-hour (hh:mm:ss)
%X locale's time representation (%H:%M:%S)
+ %z time zone offset (e.g. +0530, -0800 etc)
%Z time zone (EDT), or nothing if no time zone is determinable
Date fields:
@@ -70,10 +71,13 @@
%d day of month (01..31)
%e day of month ( 1..31)
%D date (mm/dd/yy)
+ %G year corresponding to the ISO 8601 week
+ %g Year of the ISO 8601 week within century (00 - 99)
%h same as %b
%j day of year (001..366)
%m month (01..12)
%U week number of year with Sunday as first day of week (00..53)
+ %V ISO 8601 week number (first week is the earliest one with Thu)
%w day of week (0..6)
%W week number of year with Monday as first day of week (00..53)
%x locale's date representation (mm/dd/yy)
@@ -235,6 +239,30 @@ mon_week (const struct tm *tm)
return dl <= 0 ? 0 : dl / 7 + (dl % 7 != 0);
}
+#ifndef __isleap
+/* Nonzero if YEAR is a leap year (every 4 years,
+ except every 100th isn't, and every 400th is). */
+# define __isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+#endif
+
+/* The number of days from the first day of the first ISO week of this
+ year to the year day YDAY with week day WDAY. ISO weeks start on
+ Monday; the first ISO week has the year's first Thursday. YDAY may
+ be as small as YDAY_MINIMUM. */
+#define ISO_WEEK_START_WDAY 1 /* Monday */
+#define ISO_WEEK1_WDAY 4 /* Thursday */
+#define YDAY_MINIMUM (-366)
+static int
+iso_week_days (int yday, int wday)
+{
+ /* Add enough to the first operand of % to make it nonnegative. */
+ int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7;
+ return (yday
+ - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7
+ + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY);
+}
+
#if !defined(HAVE_TM_ZONE) && !defined(HAVE_TZNAME)
char *zone_name (const struct tm *tp);
char *
@@ -362,10 +390,125 @@ strftime (char *string, size_t max, cons
length +=
strftime (&string[length], max - length, "%H:%M:%S", tm);
break;
+
+ case 'V':
+ case 'g':
+ case 'G':
+ {
+ int year = tm->tm_year + 1900;
+ int days = iso_week_days (tm->tm_yday, tm->tm_wday);
+
+ if (days < 0)
+ {
+ /* This ISO week belongs to the previous year. */
+ year--;
+ days =
+ iso_week_days (tm->tm_yday + (365 + __isleap (year)),
+ tm->tm_wday);
+ }
+ else
+ {
+ int d =
+ iso_week_days (tm->tm_yday - (365 + __isleap (year)),
+ tm->tm_wday);
+ if (0 <= d)
+ {
+ /* This ISO week belongs to the next year. */
+ year++;
+ days = d;
+ }
+ }
+
+ switch (*format)
+ {
+ /*
+ #### FIXME
+ We really can't assume 1000 <= year <= 9999
+ once time_t gets beyond 32 bits, but it's true
+ of the rest of the code here so get with the
+ program
+ */
+ case 'g':
+ length +=
+ add_num2 (&string[length], year % 100,
+ max - length, pad);
+ break;
+
+ case 'G':
+ add_char (year / 1000 + '0');
+ length += add_num3 (&string[length], year % 1000,
+ max - length, zero);
+ break;
+
+ default:
+ length +=
+ add_num2 (&string[length], days / 7 + 1,
+ max - length, pad);
+ break;
+ }
+ }
+ break;
case 'X':
length +=
strftime (&string[length], max - length, "%H:%M:%S", tm);
break;
+ case 'z':
+ {
+ /*
+ #### FIXME: could use tm->tm_gmtoff if present. Since
+ the other code in xemacs does not do so we follow the
+ leaders (and don't add a autoconf macro to detect
+ its presence).
+ */
+ long int offset;
+ long int minutes;
+ struct tm lt, *ut;
+ time_t utc;
+
+ lt = *tm;
+ utc = mktime(<);
+ ut = gmtime(&utc);
+ /* assume that tm is valid so the others will be too! */
+ assert( utc != (time_t) -1 && ut != NULL );
+
+ /* tm diff code below is based on mktime.c, glibc 2.3.2 */
+ {
+ int lt4, ut4, lt100, ut100, lt400, ut400;
+ int intervening_leap_days, years, days;
+
+ lt4 = (lt.tm_year >> 2) + (1900 >> 2) -
+ ! (lt.tm_year & 3);
+ ut4 = (ut->tm_year >> 2) + (1900 >> 2) -
+ ! (ut->tm_year & 3);
+ lt100 = lt4 / 25 - (lt4 % 25 < 0);
+ ut100 = ut4 / 25 - (ut4 % 25 < 0);
+ lt400 = lt100 >> 2;
+ ut400 = ut100 >> 2;
+ intervening_leap_days =
+ (lt4 - ut4) - (lt100 - ut100) + (lt400 - ut400);
+ years = lt.tm_year - ut->tm_year;
+ days = (365 * years + intervening_leap_days
+ + (lt.tm_yday - ut->tm_yday));
+ offset = (60 * (60 * (24 * days + (lt.tm_hour - ut->tm_hour))
+ + (lt.tm_min - ut->tm_min))
+ + (lt.tm_sec - ut->tm_sec));
+ }
+
+ minutes = offset / ( offset < 0 ? -60 : 60 );
+
+ add_char ((offset < 0 ? '-' : '+'));
+
+ if ( minutes / 600 != 0 )
+ add_char (minutes / 600 + '0');
+ else if ( pad != none )
+ add_char ((pad == zero ? '0' : ' '));
+
+ length +=
+ add_num3 (&string[length],
+ ((minutes / 60 ) % 10) * 100 + (minutes % 60),
+ max - length, pad);
+ break;
+ }
case 'Z':
#ifdef HAVE_TM_ZONE
length += add_str (&string[length], tm->tm_zone, max - length);
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