Initial import of libucore

src/ucore_tval.c

@@ -0,0 +1,51 @@
+#include <sys/time.h>
+
+struct timeval *
+uc_tvadd(struct timeval *dst, const struct timeval *a, const struct timeval *b)
+{
+	dst->tv_sec = a->tv_sec + b->tv_sec;
+	dst->tv_usec = a->tv_usec + b->tv_usec;
+
+	if (dst->tv_usec >= 1000000)
+		dst->tv_sec++, dst->tv_usec -= 1000000;
+
+	return dst;
+}
+
+struct timeval *
+uc_tvsub(struct timeval *dst, const struct timeval *a, const struct timeval *b)
+{
+	dst->tv_sec = a->tv_sec - b->tv_sec;
+	dst->tv_usec = a->tv_usec - b->tv_usec;
+
+	if (dst->tv_usec < 0)
+		dst->tv_sec--, dst->tv_usec += 1000000;
+
+	return dst;
+}
+
+int 
+uc_tvcmp(const struct timeval *a, const struct timeval *b)
+{
+    if(a->tv_sec < b->tv_sec)
+        return -1;
+    else if(a->tv_sec > b->tv_sec)
+        return 1;
+
+	if (a->tv_usec < b->tv_usec)
+		return -1;
+	else if (a->tv_usec > b->tv_usec)
+        return 1;
+
+    return 0;
+}
+
+struct timeval *
+uc_to2tv(struct timeval *dst, unsigned long ms)
+{
+	dst->tv_sec = ms / 1000;
+	dst->tv_usec = ms % 1000 * 1000;
+
+	return dst;
+}
+