X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fmktime.c;h=a42c771542023520f20b6a984e35d49f17dafc83;hb=ce8d6d06c84df409ebb0d71478a122f48cff3dc6;hp=e5f25d984e25420ace7a6daf61850ba45f7fed61;hpb=bf982dc2f9119b5d655e3266b70bd716cc92cf95;p=gnulib.git

diff --git a/lib/mktime.c b/lib/mktime.c
index e5f25d984..a42c77154 100644
--- a/lib/mktime.c
+++ b/lib/mktime.c
@@ -1,8 +1,7 @@
 /* Convert a `struct tm' to a time_t value.
-   Copyright (C) 1993-1999, 2002-2004, 2005 Free Software Foundation, Inc.
-   Inc.
+   Copyright (C) 1993-1999, 2002-2007, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Paul Eggert (eggert@twinsun.com).
+   Contributed by Paul Eggert <eggert@twinsun.com>.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -16,13 +15,13 @@
 
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
 
 /* Define this to have a standalone program to test this implementation of
    mktime.  */
 /* #define DEBUG 1 */
 
-#ifdef HAVE_CONFIG_H
+#ifndef _LIBC
 # include <config.h>
 #endif
 
@@ -33,7 +32,6 @@
 # define LEAP_SECONDS_POSSIBLE 1
 #endif
 
-#include <sys/types.h>		/* Some systems define `time_t' here.  */
 #include <time.h>
 
 #include <limits.h>
@@ -142,11 +140,10 @@ const unsigned short int __mon_yday[2][13] =
 
 
 #ifndef _LIBC
-/* Portable standalone applications should supply a "time_r.h" that
+/* Portable standalone applications should supply a <time.h> that
    declares a POSIX-compliant localtime_r, for the benefit of older
    implementations that lack localtime_r or have a nonstandard one.
    See the gnulib time_r module for one way to implement this.  */
-# include "time_r.h"
 # undef __localtime_r
 # define __localtime_r localtime_r
 # define __mktime_internal mktime_internal
@@ -168,8 +165,11 @@ ydhms_diff (long int year1, long int yday1, int hour1, int min1, int sec1,
 	    int year0, int yday0, int hour0, int min0, int sec0)
 {
   verify (C99_integer_division, -1 / 2 == 0);
+#if 0 /* This assertion fails on 32-bit systems with 64-bit time_t, such as
+         NetBSD 5 on i386.  */
   verify (long_int_year_and_yday_are_wide_enough,
 	  INT_MAX <= LONG_MAX / 2 || TIME_T_MAX <= UINT_MAX);
+#endif
 
   /* Compute intervening leap days correctly even if year is negative.
      Take care to avoid integer overflow here.  */
@@ -216,10 +216,11 @@ guess_time_tm (long int year, long int yday, int hour, int min, int sec,
   /* Overflow occurred one way or another.  Return the nearest result
      that is actually in range, except don't report a zero difference
      if the actual difference is nonzero, as that would cause a false
-     match.  */
+     match; and don't oscillate between two values, as that would
+     confuse the spring-forward gap detector.  */
   return (*t < TIME_T_MIDPOINT
-	  ? TIME_T_MIN + (*t == TIME_T_MIN)
-	  : TIME_T_MAX - (*t == TIME_T_MAX));
+	  ? (*t <= TIME_T_MIN + 1 ? *t + 1 : TIME_T_MIN)
+	  : (TIME_T_MAX - 1 <= *t ? *t - 1 : TIME_T_MAX));
 }
 
 /* Use CONVERT to convert *T to a broken down time in *TP.
@@ -292,7 +293,9 @@ __mktime_internal (struct tm *tp,
   int mday = tp->tm_mday;
   int mon = tp->tm_mon;
   int year_requested = tp->tm_year;
-  int isdst = tp->tm_isdst;
+  /* Normalize the value.  */
+  int isdst = ((tp->tm_isdst >> (8 * sizeof (tp->tm_isdst) - 1))
+	       | (tp->tm_isdst != 0));
 
   /* 1 if the previous probe was DST.  */
   int dst2;