Fri Sep 29 03:43:51 1995 Paul Eggert <eggert@twinsun.com>

	Rewrite mktime from scratch for performance, and for correctness
	in the presence of leap seconds.

	* time/mktime.c	(ydhms_tm_diff, not_equal_tm, print_tm, check_result):
	New functions.
	(LEAP_SECONDS_POSSIBLE, CHAR_BIT, INT_MIN, INT_MAX,
	TIME_T_MIN, TIME_T_MAX, TM_YEAR_BASE, EPOCH_YEAR): New macros.
	<limits.h>, <stdlib.h>: New #includes.
	(main): Support tests with given broken-down value; support benchmarks.
	(__mon_lengths, debugging_enabled, printtm, dist_tm, doit,
	do_normalization, normalize, BAD_STRUCT_TM, SKIP_VALUE,
	<ctype.h>): Remove.

	* time/time.h, time/mktime.c (__mktime_internal): New offset arg.
	* time/mktime.c (mktime), time/timegm.c (timegm): Use it.

	* time/mktime.c (__mon_yday): New variable; replaces `__mon_lengths'.
	time/offtime.c (__offtime), time/tzset.c (compute_change): Use it.
	
	* time/offtime.c (__offtime): Remove useless assignment
	`tp->tm_isdst = -1'.

	* manual/maint.texi: Update credits.

Fri Oct  6 00:28:53 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* sysdeps/unix/common/readv.S: Moved to sysdeps/unix/bsd.
	* sysdeps/unix/common/writev.S: Moved to sysdeps/unix/bsd.
	* sysdeps/unix/sysv/linux/readv.c: File removed.
	* sysdeps/unix/sysv/linux/writev.c: File removed.
	* sysdeps/unix/configure.in: Check for readv and writev syscalls.

	* sysdeps/unix/configure.in: If eval doesn't set $unix_srcname,
	set it to $unix_syscall instead of $unix_function.

1 files changed, 5 insertions, 5 deletions

diff --git a/time/offtime.c b/time/offtime.c
index e588c4c66b..4b8ddb170b 100644
--- a/time/offtime.c
+++ b/time/offtime.c
@@ -21,7 +21,7 @@ Cambridge, MA 02139, USA.  */
 
 
 /* Defined in mktime.c.  */
-extern CONST unsigned short int __mon_lengths[2][12];
+extern CONST unsigned short int __mon_yday[2][13];
 
 #define	SECS_PER_HOUR	(60 * 60)
 #define	SECS_PER_DAY	(SECS_PER_HOUR * 24)
@@ -71,10 +71,10 @@ DEFUN(__offtime, (t, offset, tp),
     }
   tp->tm_year = y - 1900;
   tp->tm_yday = days;
-  ip = __mon_lengths[__isleap(y)];
-  for (y = 0; days >= ip[y]; ++y)
-    days -= ip[y];
+  ip = __mon_yday[__isleap(y)];
+  for (y = 11; days < ip[y]; --y)
+    continue;
+  days -= ip[y];
   tp->tm_mon = y;
   tp->tm_mday = days + 1;
-  tp->tm_isdst = -1;
 }