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-rw-r--r--lib/timegm.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/timegm.c b/lib/timegm.c
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+++ b/lib/timegm.c
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+/* Convert UTC calendar time to simple time. Like mktime but assumes UTC.
+
+ Copyright (C) 1994-2022 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _LIBC
+# include <libc-config.h>
+#endif
+
+#include <time.h>
+#include <errno.h>
+
+#include "mktime-internal.h"
+
+__time64_t
+__timegm64 (struct tm *tmp)
+{
+ static mktime_offset_t gmtime_offset;
+ tmp->tm_isdst = 0;
+ return __mktime_internal (tmp, __gmtime64_r, &gmtime_offset);
+}
+
+#if defined _LIBC && __TIMESIZE != 64
+
+libc_hidden_def (__timegm64)
+
+time_t
+timegm (struct tm *tmp)
+{
+ struct tm tm = *tmp;
+ __time64_t t = __timegm64 (&tm);
+ if (in_time_t_range (t))
+ {
+ *tmp = tm;
+ return t;
+ }
+ else
+ {
+ __set_errno (EOVERFLOW);
+ return -1;
+ }
+}
+
+#endif