summaryrefslogtreecommitdiffhomepage
path: root/misc/examples/birthday.c
diff options
context:
space:
mode:
Diffstat (limited to 'misc/examples/birthday.c')
-rw-r--r--misc/examples/birthday.c50
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()