diff options
| -rw-r--r-- | t/helper/test-mergesort.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/t/helper/test-mergesort.c b/t/helper/test-mergesort.c index 43ec74e2d3..ebf68f7de8 100644 --- a/t/helper/test-mergesort.c +++ b/t/helper/test-mergesort.c @@ -2,6 +2,12 @@ #include "cache.h" #include "mergesort.h" +static uint32_t minstd_rand(uint32_t *state) +{ + *state = (uint64_t)*state * 48271 % 2147483647; + return *state; +} + struct line { char *text; struct line *next; @@ -60,8 +66,9 @@ static void dist_sawtooth(int *arr, int n, int m) static void dist_rand(int *arr, int n, int m) { int i; + uint32_t seed = 1; for (i = 0; i < n; i++) - arr[i] = rand() % m; + arr[i] = minstd_rand(&seed) % m; } static void dist_stagger(int *arr, int n, int m) @@ -81,8 +88,9 @@ static void dist_plateau(int *arr, int n, int m) static void dist_shuffle(int *arr, int n, int m) { int i, j, k; + uint32_t seed = 1; for (i = j = 0, k = 1; i < n; i++) - arr[i] = (rand() % m) ? (j += 2) : (k += 2); + arr[i] = minstd_rand(&seed) % m ? (j += 2) : (k += 2); } #define DIST(name) { #name, dist_##name } |