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tests/utils_tests.h: add utils_init_random

--- a/tests/utils_tests.h

+++ b/tests/utils_tests.h

@@ -1,7 +1,18 @@

+#include <time.h>

 #include <stdlib.h>

 #include <stdio.h>

+#include <math.h>

+#include <assert.h>

-#define PRINT_ERR(format, args...)   fprintf(stderr, "AUBIO ERROR: " format , ##args)

+#define PRINT_ERR(format, args...)   fprintf(stderr, "AUBIO-TESTS ERROR: " format , ##args)

 #define PRINT_MSG(format, args...)   fprintf(stdout, format , ##args)

 #define PRINT_DBG(format, args...)   fprintf(stderr, format , ##args)

-#define PRINT_WRN(...)               fprintf(stderr, "AUBIO WARNING: " format, ##args)

+#define PRINT_WRN(format, args...)   fprintf(stderr, "AUBIO-TESTS WARNING: " format, ##args)

+

+void utils_init_random () {

+  time_t now = time(0);

+  struct tm *tm_struct = localtime(&now);

+  int seed = tm_struct->tm_sec;

+  //PRINT_WRN("current seed: %d\n", seed);

+  srandom (seed);

+}