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TempleWare-CS2/source/templeware/utils/fnv1a/fnv1a.h

@@ -0,0 +1,20 @@
+#pragma once
+#include <stdint.h>
+
+// FNV1a c++11 constexpr compile time hash functions, 32 and 64 bit
+// str should be a null terminated string literal, value should be left out 
+// e.g hash_32_fnv1a_const("example")
+// code license: public domain or equivalent
+// post: https://notes.underscorediscovery.com/constexpr-fnv1a/
+
+constexpr uint32_t val_32_const = 0x811c9dc5;
+constexpr uint32_t prime_32_const = 0x1000193;
+
+inline constexpr uint32_t hash_32_fnv1a_const(const char* const str, const uint32_t value = val_32_const) noexcept
+{
+	return (str[0] == '\0') ? value : hash_32_fnv1a_const(&str[1], (value ^ uint32_t(str[0])) * prime_32_const);
+}
+
+// life do be like that
+
+#define HASH hash_32_fnv1a_const