Add implementation for the murmur3 x64_128 hash

2026-08-30 22:03:28 +01:00
parent d5578f009a
commit 55ff77c4ea
15 changed files with 980 additions and 0 deletions
@@ -0,0 +1,40 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+/**
+ * An implementation of the x64 128-bit variant of the MurmurHash3 algorithm
+ * based on https://github.com/aappleby/smhasher/blob/master/src/MurmurHash3.cpp
+ */
+
+#ifndef MURMUR3_H
+#define MURMUR3_H
+
+#include "../../stream/stream.h"
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/platform/platform.h"
+
+#ifdef WP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+#define WP_MUR3_HASHER_MAGIC ((u64)0x57504d4841534833)
+
+typedef struct {
+	u64 magic;
+	u64 out_hash1;
+	u64 out_hash2;
+	u32 seed;
+} WpMur3HasherIO;
+
+#ifdef WP_PLATFORM_CPP
+#define wpMur3HasherIO(SEED) (WpMur3HasherIO{WP_MUR3_HASHER_MAGIC, 0, 0, SEED})
+#else
+#define wpMur3HasherIO(SEED) ((WpMur3HasherIO){ .magic = WP_MUR3_HASHER_MAGIC, .seed = SEED })
+#endif
+
+void wpX64Mur3Hasher128(WpU8Stream *bytes, void *hasher_io);
+
+#ifdef WP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+#endif // !MURMUR3_H