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-rw-r--r--compat/gmtime.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/compat/gmtime.c b/compat/gmtime.c
new file mode 100644
index 0000000000..e8362dd2b9
--- /dev/null
+++ b/compat/gmtime.c
@@ -0,0 +1,29 @@
+#include "../git-compat-util.h"
+#undef gmtime
+#undef gmtime_r
+
+struct tm *git_gmtime(const time_t *timep)
+{
+ static struct tm result;
+ return git_gmtime_r(timep, &result);
+}
+
+struct tm *git_gmtime_r(const time_t *timep, struct tm *result)
+{
+ struct tm *ret;
+
+ memset(result, 0, sizeof(*result));
+ ret = gmtime_r(timep, result);
+
+ /*
+ * Rather than NULL, FreeBSD gmtime simply leaves the "struct tm"
+ * untouched when it encounters overflow. Since "mday" cannot otherwise
+ * be zero, we can test this very quickly.
+ */
+ if (ret && !ret->tm_mday) {
+ ret = NULL;
+ errno = EOVERFLOW;
+ }
+
+ return ret;
+}