diff options
Diffstat (limited to 'random.c')
-rw-r--r-- | random.c | 23 |
1 files changed, 23 insertions, 0 deletions
@@ -1259,7 +1259,15 @@ random_s_rand(int argc, VALUE *argv, VALUE obj) return random_rand(argc, argv, rb_Random_DEFAULT); } +#define SIP_HASH_STREAMING 0 +#define sip_hash24 ruby_sip_hash24 +#include "siphash.c" + static st_index_t hashseed; +static union { + uint8_t key[16]; + uint32_t u32[(16 * sizeof(uint8_t) - 1) / sizeof(uint32_t)]; +} sipseed; static VALUE init_randomseed(struct MT *mt, unsigned int initial[DEFAULT_SEED_CNT]) @@ -1279,6 +1287,7 @@ Init_RandomSeed(void) unsigned int initial[DEFAULT_SEED_CNT]; struct MT *mt = &r->mt; VALUE seed = init_randomseed(mt, initial); + int i; hashseed = genrand_int32(mt); #if SIZEOF_ST_INDEX_T*CHAR_BIT > 4*8 @@ -1294,6 +1303,9 @@ Init_RandomSeed(void) hashseed |= genrand_int32(mt); #endif + for (i = 0; i < numberof(sipseed.u32); ++i) + sipseed.u32[i] = genrand_int32(mt); + rb_global_variable(&r->seed); r->seed = seed; } @@ -1304,6 +1316,17 @@ rb_hash_start(st_index_t h) return st_hash_start(hashseed + h); } +st_index_t +rb_memhash(const void *ptr, long len) +{ + sip_uint64_t h = sip_hash24(sipseed.key, ptr, len); +#ifdef HAVE_UINT64_T + return (st_index_t)h; +#else + return (st_index_t)(h.u32[0] ^ h.u32[1]); +#endif +} + static void Init_RandomSeed2(void) { |