1 files changed, 47 insertions, 0 deletions
diff --git a/libpatch_parse_timestamp.c b/libpatch_parse_timestamp.c
new file mode 100644
index 0000000..aceb058
--- /dev/null
+++ b/libpatch_parse_timestamp.c
@@ -0,0 +1,47 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+const char *
+libpatch_parse_timestamp(const char *text, struct tm *time_out, const char **frac_out,
+                         int *has_zone_out, enum libpatch_style style)
+{
+	const char *fmt, *r;
+	struct tm zone;
+
+	if (style == LIBPATCH_STYLE_COPIED) {
+		fmt = "%a %b %e %T %Y";
+	} else if (style == LIBPATCH_STYLE_UNIFIED) {
+		fmt = "%Y-%m-%d %H:%M:%S";
+	} else {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	text = strptime(text, fmt, time_out);
+	if (!text)
+		return NULL;
+
+	if (text[0] == '.') {
+		*frac_out = ++text;
+		while (isdigit(*text))
+			text++;
+	} else {
+		*frac_out = NULL;
+	}
+
+	time_out->tm_isdst = -1;
+	time_out->tm_zone = NULL;
+
+	r = strptime(text, " %z", &zone);
+	if (r) {
+		text = r;
+		*has_zone_out = 1;
+		time_out->tm_gmtoff = zone.tm_gmtoff;
+	} else {
+		*has_zone_out = 0;
+		time_out->tm_gmtoff = 0;
+	}
+
+	return text;
+}