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Add Murmur3 validation
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Abdelrahman Said
2026-08-30 23:56:50 +01:00
parent 850f709a10
commit bca2e720ad
1 changed files with 11 additions and 4 deletions
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src/base/hash/hasher/murmur3.c
+11 -4
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@@ -2,14 +2,17 @@
#include "murmur3.h" #include "murmur3.h"
#include "../../../common/aliases/aliases.h" #include "../../../common/aliases/aliases.h"
#include "../../../common/assert/assert.h"
#include "../../../common/misc/misc_utils.h" #include "../../../common/misc/misc_utils.h"
#define _bigConstant(x) (x##LLU) #define _bigConstant(x) (x##LLU)
wp_intern inline u64 fmix64(u64 k); wp_intern inline void _validateIO(const WpMur3HasherIO *io);
wp_intern inline u64 _fmix64(u64 k);
void wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io) { void wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io) {
WpMur3HasherIO *io = (WpMur3HasherIO *)hasher_io; WpMur3HasherIO *io = (WpMur3HasherIO *)hasher_io;
_validateIO(io);
const i32 nblocks = (bytes->count * bytes->item_size) / 16; const i32 nblocks = (bytes->count * bytes->item_size) / 16;
@@ -84,8 +87,8 @@ void wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io) {
h1 += h2; h1 += h2;
h2 += h1; h2 += h1;
h1 = fmix64(h1); h1 = _fmix64(h1);
h2 = fmix64(h2); h2 = _fmix64(h2);
h1 += h2; h1 += h2;
h2 += h1; h2 += h1;
@@ -94,7 +97,11 @@ void wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io) {
io->hash[1] = h2; io->hash[1] = h2;
} }
wp_intern inline u64 fmix64(u64 k) { wp_intern inline void _validateIO(const WpMur3HasherIO *io) {
wpRuntimeAssert(io->magic == WP_MUR3_HASHER_MAGIC, "Invalid Murmur3 hash IO");
}
wp_intern inline u64 _fmix64(u64 k) {
k ^= k >> 33; k ^= k >> 33;
k *= _bigConstant(0xff51afd7ed558ccd); k *= _bigConstant(0xff51afd7ed558ccd);
k ^= k >> 33; k ^= k >> 33;