jeanlemotan
44 lines
2.3 KiB
C++
44 lines
2.3 KiB
C++
#pragma once
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#include "tl/detail/prologue.h"
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#include <cstdint>
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#include <cstddef>
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namespace tl
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{
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//case insensitive murmur hash. Used for case insensitive strings
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//uint32_t murmur32_ci(const void* buffer, size_t size, uint32_t seed);
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//uint32_t murmur32_ci(const char* c_str, uint32_t seed);
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TL_API uint32_t murmur32(const void* buffer, size_t size, uint32_t seed);
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TL_API uint64_t murmur64(const void* buffer, size_t size, uint32_t seed);
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TL_API uint64_t murmur64_seed64(const void* buffer, size_t size, uint64_t seed);
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TL_API uint32_t murmur32(const char* c_str, uint32_t seed);
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TL_API uint64_t murmur64(const char* c_str, uint32_t seed);
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TL_API uint32_t murmur_unaligned32(const char* c_str, uint32_t seed);
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TL_API uint64_t murmur_unaligned64(const char* c_str, uint32_t seed);
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TL_API uint32_t murmur_unaligned32(const void* i_buffer, size_t i_size, uint32_t i_seed);
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TL_API uint64_t murmur_unaligned64(const void* i_buffer, size_t i_size, uint64_t i_seed);
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//templated interface for metaprogramming
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//buffer + size hashing
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template<typename T> T murmur(const void* buffer, size_t size, uint32_t seed); //intentionally left without implementation to fail compilation for unsupported types
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template<> inline uint8_t murmur(const void* buffer, size_t size, uint32_t seed) { return murmur32(buffer, size, seed) & 0xff; }
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template<> inline uint16_t murmur(const void* buffer, size_t size, uint32_t seed) { return murmur32(buffer, size, seed) & 0xffff; }
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template<> inline uint32_t murmur(const void* buffer, size_t size, uint32_t seed) { return murmur32(buffer, size, seed); }
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template<> inline uint64_t murmur(const void* buffer, size_t size, uint32_t seed) { return murmur64(buffer, size, seed); }
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//c string hashing
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template<typename T> T murmur(const char* c_str, uint32_t seed); //intentionally left without implementation to fail compilation for unsupported types
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template<> inline uint8_t murmur(const char* c_str, uint32_t seed) { return murmur32(c_str, seed) & 0xF; }
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template<> inline uint16_t murmur(const char* c_str, uint32_t seed) { return murmur32(c_str, seed) & 0xFF; }
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template<> inline uint32_t murmur(const char* c_str, uint32_t seed) { return murmur32(c_str, seed); }
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template<> inline uint64_t murmur(const char* c_str, uint32_t seed) { return murmur64(c_str, seed); }
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}
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