Restructure hasher implementation

src/base/hash/hasher/hasher.h

@@ -4,24 +4,49 @@
 #define HASHER_H
 
 #include "../../stream/stream.h"
+#include "../../../common/aliases/aliases.h"
 
 #ifdef WP_PLATFORM_CPP
 BEGIN_C_LINKAGE
 #endif // !WP_PLATFORM_CPP
 
-typedef struct WpU128Hash {
-	u64 hash[2];
-} WpU128Hash;
+typedef struct WpU128 {
+	u64 value[2];
+} WpU128;
 
-typedef WpU128Hash (*WpHashFunc)(WpU8Stream *stream, void *hasher_data);
+typedef enum WpHasherCtxType {
+	WP_HASHER_CTX_MURMUR3,
+	WP_HASHER_CTX_SIPHASH,
+	WP_HASHER_CTX_USER_DEFINED,
+
+	COUNT_HASHER_CTX,
+} WpHasherCtxType;
+
+typedef struct WpSiphashCtx {
+	WpU128 key;
+	u64    compression;
+	u64    finalisation;
+} WpSiphashCtx;
+
+typedef struct WpHasherCtx {
+	WpHasherCtxType type;
+	union {
+		WpSiphashCtx siphash;
+		void        *user;
+		u32          murmur3;
+	};
+} WpHasherCtx;
+
+typedef WpU128 (*WpHashFunc)(WpU8Stream *stream, WpHasherCtx ctx);
 
 typedef struct WpHasher {
-	WpHashFunc func;
-	void      *data;
+	WpHashFunc  func;
+	WpHasherCtx ctx;
 } WpHasher;
 
-WpU128Hash wpHasherGetHash128(const WpHasher *hasher, WpU8Stream *stream);
-u64        wpHasherGetHash64 (const WpHasher *hasher, WpU8Stream *stream);
+WpHasher wpCustomHasher(WpHashFunc func, void *ctx);
+WpU128   wpHasherGetHash128(const WpHasher *hasher, WpU8Stream *stream);
+u64      wpHasherGetHash64(const WpHasher *hasher, WpU8Stream *stream);
 
 #ifdef WP_PLATFORM_CPP
 END_C_LINKAGE