1 files changed, 54 insertions, 0 deletions
diff --git a/rtrlib/lib/utils.c b/rtrlib/lib/utils.c
new file mode 100644
index 0000000..ca708e9
--- /dev/null
+++ b/rtrlib/lib/utils.c
@@ -0,0 +1,54 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website: http://rtrlib.realmv6.org/
+ */
+
+#include "utils_private.h"
+
+#include <assert.h>
+#include <stdint.h>
+#include <time.h>
+
+#ifdef __MACH__
+#include <mach/mach_time.h>
+static double timeconvert = 0.0;
+#endif
+
+int lrtr_get_monotonic_time(time_t *seconds)
+{
+#ifdef __MACH__
+	if (timeconvert == 0.0) {
+		mach_timebase_info_data_t time_base;
+		(void)mach_timebase_info(&time_base);
+		timeconvert = (double)time_base.numer / (double)time_base.denom / 1000000000.0;
+	}
+	*seconds = (time_t)mach_absolute_time() * timeconvert;
+#else
+	struct timespec time;
+
+	if (clock_gettime(CLOCK_MONOTONIC, &time) == -1)
+		return -1;
+	*seconds = time.tv_sec;
+	if ((time.tv_nsec * 1000000000) >= 5)
+		*seconds += 1;
+#endif
+	return 0;
+}
+
+uint32_t lrtr_get_bits(const uint32_t val, const uint8_t from, const uint8_t number)
+{
+	assert(number < 33);
+	assert(number > 0);
+
+	uint32_t mask = ~0;
+
+	if (number != 32)
+		mask = ~(mask >> number);
+
+	mask >>= from;
+	return (mask & val);
+}