diff options
Diffstat (limited to 'misc/examples/birthday.c')
| -rw-r--r-- | misc/examples/birthday.c | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/misc/examples/birthday.c b/misc/examples/birthday.c index cb627ef8..c301128a 100644 --- a/misc/examples/birthday.c +++ b/misc/examples/birthday.c @@ -1,7 +1,7 @@ #include <math.h> #include <stdio.h> #include <time.h> -#include <stc/crandom.h> +#include <stc/crand.h> #define i_tag ic #define i_key uint64_t @@ -17,17 +17,16 @@ static void test_repeats(void) const static uint64_t mask = (1ull << BITS) - 1; printf("birthday paradox: value range: 2^%d, testing repeats of 2^%d values\n", BITS, BITS_TEST); - stc64_t rng = stc64_new(seed); - c_auto (cmap_ic, m) - { - cmap_ic_reserve(&m, N); - c_forrange (i, N) { - uint64_t k = stc64_rand(&rng) & mask; - int v = cmap_ic_insert(&m, k, 0).ref->second += 1; - if (v > 1) printf("repeated value %" PRIu64 " (%d) at 2^%d\n", - k, v, (int) log2((double) i)); - } + crand_t rng = crand_init(seed); + + cmap_ic m = cmap_ic_with_capacity(N); + c_forrange (i, N) { + uint64_t k = crand_u64(&rng) & mask; + int v = cmap_ic_insert(&m, k, 0).ref->second += 1; + if (v > 1) printf("repeated value %" PRIu64 " (%d) at 2^%d\n", + k, v, (int)log2((double)i)); } + cmap_ic_drop(&m); } #define i_key uint32_t @@ -39,25 +38,26 @@ void test_distribution(void) { enum {BITS = 26}; printf("distribution test: 2^%d values\n", BITS); - stc64_t rng = stc64_new(seed); + crand_t rng = crand_init(seed); const size_t N = 1ull << BITS ; - c_auto (cmap_x, map) { - c_forrange (N) { - uint64_t k = stc64_rand(&rng); - cmap_x_insert(&map, k & 0xf, 0).ref->second += 1; - } + cmap_x map = {0}; + c_forrange (N) { + uint64_t k = crand_u64(&rng); + cmap_x_insert(&map, k & 0xf, 0).ref->second += 1; + } - uint64_t sum = 0; - c_foreach (i, cmap_x, map) sum += i.ref->second; - sum /= (uint64_t)map.size; + uint64_t sum = 0; + c_foreach (i, cmap_x, map) sum += i.ref->second; + sum /= (uint64_t)map.size; - c_foreach (i, cmap_x, map) { - printf("%4" PRIu32 ": %" PRIu64 " - %" PRIu64 ": %11.8f\n", - i.ref->first, i.ref->second, sum, - (1.0 - (double)i.ref->second / (double)sum)); - } + c_foreach (i, cmap_x, map) { + printf("%4" PRIu32 ": %" PRIu64 " - %" PRIu64 ": %11.8f\n", + i.ref->first, i.ref->second, sum, + (1.0 - (double)i.ref->second / (double)sum)); } + + cmap_x_drop(&map); } int main() |
