initial import

1 files changed, 84 insertions, 0 deletions

diff --git a/time/localtime.c b/time/localtime.c
new file mode 100644
index 0000000000..3377b80197
--- /dev/null
+++ b/time/localtime.c
@@ -0,0 +1,84 @@
+/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <localeinfo.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+
+#ifndef	HAVE_GNU_LD
+#define	__tzname	tzname
+#define	__daylight	daylight
+#define	__timezone	timezone
+#endif
+
+/* Return the `struct tm' representation of *TIMER in the local timezone.  */
+struct tm *
+DEFUN(localtime, (timer), CONST time_t *timer)
+{
+  extern int __use_tzfile;
+  extern int EXFUN(__tz_compute, (time_t timer, struct tm *tp));
+  extern int EXFUN(__tzfile_compute, (time_t timer,
+				      long int *leap_correct, int *leap_hit));
+  register struct tm *tp;
+  long int leap_correction;
+  int leap_extra_secs;
+
+  if (timer == NULL)
+    {
+      errno = EINVAL;
+      return NULL;
+    }
+
+  {
+    /* Make sure the database is initialized.  */
+    extern int __tzset_run;
+    if (! __tzset_run)
+      __tzset ();
+  }
+
+  if (__use_tzfile)
+    {
+      if (! __tzfile_compute (*timer, &leap_correction, &leap_extra_secs))
+	return NULL;
+    }
+  else
+    {
+      tp = gmtime (timer);
+      if (tp == NULL)
+	return NULL;
+
+      if (! __tz_compute (*timer, tp))
+	return NULL;
+
+      leap_correction = 0L;
+      leap_extra_secs = 0;
+    }
+
+  tp = __offtime (timer, __timezone - leap_correction);
+  tp->tm_sec += leap_extra_secs;
+  tp->tm_isdst = __daylight;
+  tp->tm_gmtoff = __timezone;
+  tp->tm_zone = __tzname[__daylight];
+  return tp;
+}