mirror of https://github.com/JAJames/Jupiter.git
Jessica James
8 years ago
2 changed files with 125 additions and 0 deletions
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/**
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* Copyright (C) 2015 Jessica James. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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* |
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* Written by Jessica James <jessica.aj@outlook.com> |
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*/ |
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#include "Hash.h" |
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#include <openssl/sha.h> |
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const uint32_t JUPITER_FNV_1_32_OFFSET_BASIS = 2166136261UL; |
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const uint64_t JUPITER_FNV_1_64_OFFSET_BASIS = 14695981039346656037ULL; |
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const uint32_t JUPITER_FNV_1_32_PRIME = 16777619UL; |
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const uint64_t JUPITER_FNV_1_64_PRIME = 1099511628211ULL; |
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uint64_t Jupiter_fnv1(void *data, size_t length) |
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{ |
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uint8_t *ptr = (uint8_t *)data; |
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uint64_t hash = JUPITER_FNV_1_64_OFFSET_BASIS; |
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while (length-- != 0) |
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{ |
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hash = hash * JUPITER_FNV_1_64_PRIME; |
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hash = hash ^ *ptr++; |
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} |
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return hash; |
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} |
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uint64_t Jupiter_fnv1a(void *data, size_t length) |
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{ |
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uint8_t *ptr = (uint8_t *)data; |
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uint64_t hash = JUPITER_FNV_1_64_OFFSET_BASIS; |
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while (length-- != 0) |
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{ |
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hash = hash ^ *ptr++; |
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hash = hash * JUPITER_FNV_1_64_PRIME; |
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} |
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return hash; |
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} |
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/**
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* Copyright (C) 2015 Jessica James. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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* |
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* Written by Jessica James <jessica.aj@outlook.com> |
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*/ |
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#if !defined _HASH_H_HEADER |
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#define _HASH_H_HEADER |
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/**
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* @file Hash.h |
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* @brief Defines some hashing algorithms. |
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*/ |
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#include "Jupiter.h" |
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#if defined __cplusplus |
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#include <cstdint> |
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namespace Jupiter |
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{ |
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/** Fowler-Noll-Vo hash algorithms */ |
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template<typename T = char> inline uint64_t fnv1(const T *str, size_t length); |
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template<typename T = char> inline uint64_t fnv1(const Jupiter::Readable_String<T> &str); |
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template<typename T = char> inline uint64_t fnv1a(const T *str, size_t length); |
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template<typename T = char> inline uint64_t fnv1a(const Jupiter::Readable_String<T> &str); |
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} |
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extern "C" |
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{ |
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#else |
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#include <stdint.h> |
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#endif // __cplusplus
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JUPITER_API uint64_t Jupiter_fnv1(void *data, size_t length); |
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JUPITER_API uint64_t Jupiter_fnv1a(void *data, size_t length); |
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#if defined __cplusplus |
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} |
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/** fnv1 implementation */ |
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template<typename T> inline uint64_t Jupiter::fnv1(const T *data, size_t length) |
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{ |
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return Jupiter_fnv1(data, length * sizeof(T)); |
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} |
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template<typename T> inline uint64_t Jupiter::fnv1(const Jupiter::Readable_String<T> &data) |
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{ |
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return Jupiter_fnv1(data.ptr(), data.size() * sizeof(T)); |
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} |
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template<typename T> inline uint64_t Jupiter::fnv1a(const T *data, size_t length) |
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{ |
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return Jupiter_fnv1a(data, length * sizeof(T)); |
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} |
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template<typename T> inline uint64_t Jupiter::fnv1a(const Jupiter::Readable_String<T> &data) |
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{ |
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return Jupiter_fnv1a(data.ptr(), data.size() * sizeof(T)); |
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} |
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#endif // __cplusplus
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#endif // _HASH_H_HEADER
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