2004-08-01 Simon Josefsson <jas@extundo.com>

[gnulib.git] / lib / mktime.c

diff --git a/lib/mktime.c b/lib/mktime.c
index 02acc52..ce3de58 100644 (file)
--- a/lib/mktime.c
+++ b/lib/mktime.c
@@ -1,5 +1,5 @@
 /* Convert a `struct tm' to a time_t value.
-   Copyright (C) 1993-1999, 2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1993-1999, 2002, 2003, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Eggert (eggert@twinsun.com).
 
@@ -25,10 +25,6 @@
 # include <config.h>
 #endif
 
-#ifdef _LIBC
-# define STDC_HEADERS 1
-#endif
-
 /* Assume that leap seconds are possible, unless told otherwise.
    If the host has a `zic' command with a `-L leapsecondfilename' option,
    then it supports leap seconds; otherwise it probably doesn't.  */
@@ -43,10 +39,8 @@
 
 #if DEBUG
 # include <stdio.h>
-# if STDC_HEADERS
-#  include <stdlib.h>
-#  include <string.h>
-# endif
+# include <stdlib.h>
+# include <string.h>
 /* Make it work even if the system's libc has its own mktime routine.  */
 # define mktime my_mktime
 #endif /* DEBUG */
@@ -106,22 +100,16 @@ const unsigned short int __mon_yday[2][13] =
   };
 
 
-#ifdef _LIBC
-# define my_mktime_localtime_r __localtime_r
-#else
-/* If we're a mktime substitute in a GNU program, then prefer
-   localtime to localtime_r, since many localtime_r implementations
-   are buggy.  */
-static struct tm *
-my_mktime_localtime_r (const time_t *t, struct tm *tp)
-{
-  struct tm *l = localtime (t);
-  if (! l)
-    return 0;
-  *tp = *l;
-  return tp;
-}
-#endif /* ! _LIBC */
+#ifndef _LIBC
+/* Portable standalone applications should supply a "time_r.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
+#endif
 
 /* Return an integer value measuring (YEAR1-YDAY1 HOUR1:MIN1:SEC1) -
    (YEAR0-YDAY0 HOUR0:MIN0:SEC0) in seconds, assuming that the clocks
@@ -243,10 +231,8 @@ ranged_convert (struct tm *(*convert) (const time_t *, struct tm *),
    the monotonic and mostly-unit-linear conversion function CONVERT.
    Use *OFFSET to keep track of a guess at the offset of the result,
    compared to what the result would be for UTC without leap seconds.
-   If *OFFSET's guess is correct, only one CONVERT call is needed.  */
-#ifndef _LIBC
-static
-#endif
+   If *OFFSET's guess is correct, only one CONVERT call is needed.
+   This function is external because it is used also by timegm.c.  */
 time_t
 __mktime_internal (struct tm *tp,
                   struct tm *(*convert) (const time_t *, struct tm *),
@@ -486,7 +472,7 @@ mktime (struct tm *tp)
   __tzset ();
 #endif
 
-  return __mktime_internal (tp, my_mktime_localtime_r, &localtime_offset);
+  return __mktime_internal (tp, __localtime_r, &localtime_offset);
 }
 
 #ifdef weak_alias
@@ -635,6 +621,6 @@ main (int argc, char **argv)
 \f
 /*
 Local Variables:
-compile-command: "gcc -DDEBUG -DSTDC_HEADERS -Wall -W -O -g mktime.c -o mktime"
+compile-command: "gcc -DDEBUG -Wall -W -O -g mktime.c -o mktime"
 End:
 */