First

2024-07-02 18:06:33 +02:00
commit 8297b0b45f
157 changed files with 24865 additions and 0 deletions
@@ -0,0 +1,60 @@
+#pragma once
+
+#include "tl/detail/prologue.h"
+#include "EASTL/functional.h"
+
+namespace tl
+{
+
+using namespace eastl;
+
+template <class T>
+constexpr inline void hash_and_combine(uint32_t& seed, const T& v) noexcept
+{
+	//the result of the hasher is size_t so - if used in arithmetic - it might produce different results in 32 and 64 bit platforms
+	//therefore we cast it here to 32 bit.
+	tl::hash<T> hasher;
+	seed ^= static_cast<uint32_t>(hasher(v)) + static_cast<uint32_t>(0x9e3779b9) + (seed << 6) + (seed >> 2);
+}
+
+template <class T>
+constexpr inline void hash_and_combine(uint64_t& seed, const T& v) noexcept
+{
+	//the result of the hasher is size_t so - if used in arithmetic - it might produce different results in 32 and 64 bit platforms
+	//therefore we cast it here to 32 bit.
+	tl::hash<T> hasher;
+	seed ^= static_cast<uint32_t>(hasher(v)) + 0xA6E9377DAF75BDFEULL + (seed << 6) + (seed >> 2);
+}
+
+#if defined(TL_PLATFORM_OSX_FAMILY)
+template <class T>
+constexpr inline void hash_and_combine(size_t& seed, const T& v) noexcept
+{
+	tl::hash<T> hasher;
+	seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+}
+#endif
+
+
+constexpr inline void hash_combine(uint32_t& seed, const uint32_t v) noexcept
+{
+	//the result of the hasher is size_t so - if used in arithmetic - it might produce different results in 32 and 64 bit platforms
+	//therefore we cast it here to 32 bit.
+	seed ^= v + static_cast<uint32_t>(0x9e3779b9u) + (seed << 6) + (seed >> 2);
+}
+
+constexpr inline void hash_combine(uint64_t& seed, const uint64_t v) noexcept
+{
+	//the result of the hasher is size_t so - if used in arithmetic - it might produce different results in 32 and 64 bit platforms
+	//therefore we cast it here to 32 bit.	
+	seed ^= static_cast<uint32_t>(v) + 0xA6E9377DAF75BDFEULL + (seed << 6) + (seed >> 2);
+}
+
+#if defined(TL_PLATFORM_OSX_FAMILY)
+constexpr inline void hash_combine(size_t& seed, const size_t v) noexcept
+{
+	seed ^= v + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+}
+#endif
+
+}