1 files changed, 39 insertions, 0 deletions
diff --git a/timevaltostr.c b/timevaltostr.c
new file mode 100644
index 0000000..d8610b3
--- /dev/null
+++ b/timevaltostr.c
@@ -0,0 +1,39 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+
+
+char *
+libsimple_timevaltostr(char *restrict buf, const struct timeval *restrict tv)
+{
+	time_t s = tv->tv_sec;
+	long int us = tv->tv_usec;
+	char sign[2] = "+";
+
+	if (!s) {
+		buf = malloc(INTSTRLEN(time_t) + sizeof("-.999999"));
+		if (!buf)
+			return NULL;
+	}
+
+	if (tv->tv_usec < 0 || tv->tv_usec >= 1000000L) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if (s == TIME_MIN && !us) {
+		sprintf(buf, "%lli.000000", (long long int)s);
+		return buf;
+	}
+
+	if (s < 0) {
+		s = -s;
+		*sign = '-';
+		if (us) {
+			s -= 1;
+			us = 1000000L - us;
+		}
+	}
+
+	sprintf(buf, "%s%lli.%06li", sign, (long long int)s, us);
+	return buf;
+}