1 files changed, 21 insertions, 0 deletions
diff --git a/libpatch_create_timestamp_frac_string.c b/libpatch_create_timestamp_frac_string.c
new file mode 100644
index 0000000..18b8090
--- /dev/null
+++ b/libpatch_create_timestamp_frac_string.c
@@ -0,0 +1,21 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+size_t
+libpatch_create_timestamp_frac_string(char *buf, size_t bufsize, const struct tm *tm,
+                                      const char *frac, int zone, enum libpatch_style style)
+{
+	uintmax_t subseconds = 0, digit;
+	unsigned decimals = 0;
+	if (frac) {
+		for (;; frac++) {
+			digit = (uintmax_t)*frac - (uintmax_t)'0';
+			if (digit > 9 || subseconds > (UINTMAX_MAX - digit) / 10U)
+				break;
+			subseconds = subseconds * 10U + digit;
+			decimals += 1;
+		}
+	}
+	return libpatch_create_timestamp(buf, bufsize, tm, subseconds, decimals, decimals, zone, style);
+}