1 files changed, 142 insertions, 0 deletions
diff --git a/source/core/StarXXHash.hpp b/source/core/StarXXHash.hpp
new file mode 100644
index 0000000..28ef202
--- /dev/null
+++ b/source/core/StarXXHash.hpp
@@ -0,0 +1,142 @@
+#ifndef STAR_XXHASH_HPP
+#define STAR_XXHASH_HPP
+
+#include "StarString.hpp"
+#include "StarByteArray.hpp"
+
+#define XXH_STATIC_LINKING_ONLY
+#include "xxhash.h"
+
+namespace Star {
+
+class XXHash32 {
+public:
+  XXHash32(uint32_t seed = 0);
+
+  void push(char const* data, size_t length);
+  uint32_t digest();
+
+private:
+  XXH32_state_s state;
+};
+
+class XXHash64 {
+public:
+  XXHash64(uint64_t seed = 0);
+
+  void push(char const* data, size_t length);
+  uint64_t digest();
+
+private:
+  XXH64_state_s state;
+};
+
+uint32_t xxHash32(char const* source, size_t length);
+uint32_t xxHash32(ByteArray const& in);
+uint32_t xxHash32(String const& in);
+
+uint64_t xxHash64(char const* source, size_t length);
+uint64_t xxHash64(ByteArray const& in);
+uint64_t xxHash64(String const& in);
+
+#define XXHASH32_PRIMITIVE(TYPE, CAST_TYPE)                 \
+  inline void xxHash32Push(XXHash32& hash, TYPE const& v) { \
+    CAST_TYPE cv = v;                                       \
+    cv = toLittleEndian(cv);                                \
+    hash.push((char const*)(&cv), sizeof(cv));              \
+  }
+
+#define XXHASH64_PRIMITIVE(TYPE, CAST_TYPE)                 \
+  inline void xxHash64Push(XXHash64& hash, TYPE const& v) { \
+    CAST_TYPE cv = v;                                       \
+    cv = toLittleEndian(cv);                                \
+    hash.push((char const*)(&cv), sizeof(cv));              \
+  }
+
+XXHASH32_PRIMITIVE(bool, bool);
+XXHASH32_PRIMITIVE(int, int32_t);
+XXHASH32_PRIMITIVE(long, int64_t);
+XXHASH32_PRIMITIVE(long long, int64_t);
+XXHASH32_PRIMITIVE(unsigned int, uint32_t);
+XXHASH32_PRIMITIVE(unsigned long, uint64_t);
+XXHASH32_PRIMITIVE(unsigned long long, uint64_t);
+XXHASH32_PRIMITIVE(float, float);
+XXHASH32_PRIMITIVE(double, double);
+
+XXHASH64_PRIMITIVE(bool, bool);
+XXHASH64_PRIMITIVE(int, int32_t);
+XXHASH64_PRIMITIVE(long, int64_t);
+XXHASH64_PRIMITIVE(long long, int64_t);
+XXHASH64_PRIMITIVE(unsigned int, uint32_t);
+XXHASH64_PRIMITIVE(unsigned long, uint64_t);
+XXHASH64_PRIMITIVE(unsigned long long, uint64_t);
+XXHASH64_PRIMITIVE(float, float);
+XXHASH64_PRIMITIVE(double, double);
+
+inline void xxHash32Push(XXHash32& hash, char const* str) {
+  hash.push(str, strlen(str));
+}
+
+inline void xxHash32Push(XXHash32& hash, String const& str) {
+  hash.push(str.utf8Ptr(), str.size());
+}
+
+inline void xxHash64Push(XXHash64& hash, char const* str) {
+  hash.push(str, strlen(str));
+}
+
+inline void xxHash64Push(XXHash64& hash, String const& str) {
+  hash.push(str.utf8Ptr(), str.size());
+}
+
+inline XXHash32::XXHash32(uint32_t seed) {
+  XXH32_reset(&state, seed);
+}
+
+inline void XXHash32::push(char const* data, size_t length) {
+  XXH32_update(&state, data, length);
+}
+
+inline uint32_t XXHash32::digest() {
+  return XXH32_digest(&state);
+}
+
+inline XXHash64::XXHash64(uint64_t seed) {
+  XXH64_reset(&state, seed);
+}
+
+inline void XXHash64::push(char const* data, size_t length) {
+  XXH64_update(&state, data, length);
+}
+
+inline uint64_t XXHash64::digest() {
+  return XXH64_digest(&state);
+}
+
+inline uint32_t xxHash32(char const* source, size_t length) {
+  return XXH32(source, length, 0);
+}
+
+inline uint32_t xxHash32(ByteArray const& in) {
+  return xxHash32(in.ptr(), in.size());
+}
+
+inline uint32_t xxHash32(String const& in) {
+  return xxHash32(in.utf8Ptr(), in.utf8Size());
+}
+
+inline uint64_t xxHash64(char const* source, size_t length) {
+  return XXH64(source, length, 0);
+}
+
+inline uint64_t xxHash64(ByteArray const& in) {
+  return xxHash64(in.ptr(), in.size());
+}
+
+inline uint64_t xxHash64(String const& in) {
+  return xxHash64(in.utf8Ptr(), in.utf8Size());
+}
+
+}
+
+#endif