39 lines
749 B
C
39 lines
749 B
C
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#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define FNV_1A_INIT 2166136261UL
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// FNV-1a hash, 32-bit
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uint32_t fnv1a_buffer_hash(const uint8_t* buffer, uint32_t length, uint32_t hash);
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#ifdef __cplusplus
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}
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#endif
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#ifdef __cplusplus
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// constexpr FNV-1a hash for strings, 32-bit
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inline constexpr uint32_t fnv1a_string_hash(const char* str) {
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uint32_t hash = FNV_1A_INIT;
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while(*str) {
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hash = (hash ^ *str) * 16777619ULL;
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str += 1;
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}
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return hash;
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}
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#else
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// FNV-1a hash for strings, 32-bit
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inline uint32_t fnv1a_string_hash(const char* str) {
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uint32_t hash = FNV_1A_INIT;
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while(*str) {
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hash = (hash ^ *str) * 16777619ULL;
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str += 1;
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}
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return hash;
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}
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#endif
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