add benchmark (issue #12)

1 files changed, 39 insertions, 0 deletions

diff --git a/bench/util.c b/bench/util.c
new file mode 100644
index 0000000..6130af5
--- /dev/null
+++ b/bench/util.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "util.h"
+
+/* read file named FILENAME into an array of *len bytes,
+   returning NULL on error */
+uint8_t *readfile(const char *filename, size_t *len)
+{
+	 *len = 0;
+	 struct stat st;
+	 if (0 != stat(filename, &st)) return NULL;
+	 *len = st.st_size;
+	 FILE *f = fopen(filename, "r");
+	 if (!f) return NULL;
+	 uint8_t *s = (uint8_t *) malloc(sizeof(uint8_t) * *len);
+	 if (!s) return NULL;
+	 if (fread(s, 1, *len, f) != *len) {
+		  free(s);
+		  s = NULL;
+	 }
+	 fclose(f);
+	 return s;
+}
+
+mytime gettime(void) {
+	 mytime t;
+	 gettimeofday(&t, NULL);
+	 return t;
+}
+
+/* time difference in seconds */
+double elapsed(mytime t1, mytime t0)
+{
+     return (double)(t1.tv_sec - t0.tv_sec) +
+          (double)(t1.tv_usec - t0.tv_usec) * 1.0E-6;
+}
+