Add the timegm Gnulib module

1 files changed, 41 insertions, 0 deletions

diff --git a/gl/timegm.c b/gl/timegm.c
new file mode 100644
index 00000000..057f6459
--- /dev/null
+++ b/gl/timegm.c
@@ -0,0 +1,41 @@
+/* Convert UTC calendar time to simple time.  Like mktime but assumes UTC.
+
+   Copyright (C) 1994, 1997, 2003, 2004, 2006, 2007 Free Software
+   Foundation, Inc.  This file is part of the GNU C Library.
+
+   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
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   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.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include <time.h>
+
+#ifndef _LIBC
+# undef __gmtime_r
+# define __gmtime_r gmtime_r
+# define __mktime_internal mktime_internal
+time_t __mktime_internal (struct tm *,
+			  struct tm * (*) (time_t const *, struct tm *),
+			  time_t *);
+#endif
+
+time_t
+timegm (struct tm *tmp)
+{
+  static time_t gmtime_offset;
+  tmp->tm_isdst = 0;
+  return __mktime_internal (tmp, __gmtime_r, &gmtime_offset);
+}