cpu_endian.h

// The core library - copyright GarageGames.  The core library is released under the MIT Open Source software license.  See /license.txt in this distribution for specific license terms.

inline void endian_swap(uint16 &value)
{
	value = (value << 8) | (value >> 8);
}

inline void endian_swap(uint32 &value)
{
	value = ((value << 24) & 0xFF000000) | ((value << 8) & 0xFF0000) | ((value >> 8) & 0xFF00) | ((value >> 24) & 0xFF);
}

inline void endian_swap(uint64 &value)
{
	uint32 *src_ptr = (uint32 *) &value;
	endian_swap(src_ptr[0]);
	endian_swap(src_ptr[1]);
	uint32 temp = src_ptr[0];
	src_ptr[0] = src_ptr[1];
	src_ptr[1] = temp;
}

inline void endian_swap(char8) {}
inline void endian_swap(int8) {}
inline void endian_swap(uint8) {}
inline void endian_swap(bool) {}

inline void endian_swap(int16 &value) { endian_swap(reinterpret_cast<uint16&>(value)); }
inline void endian_swap(int32 &value) { endian_swap(reinterpret_cast<uint32&>(value)); }
inline void endian_swap(float32 &value) { endian_swap(reinterpret_cast<uint32&>(value)); }
inline void endian_swap(int64 &value) { endian_swap(reinterpret_cast<uint64&>(value)); }
inline void endian_swap(float64 &value) { endian_swap(reinterpret_cast<uint64&>(value)); }

#ifdef LITTLE_ENDIAN
template<class type> inline void host_to_little_endian(type& /*value*/) { }
template<class type> inline void host_to_big_endian(type& value) { endian_swap(value); }
template<class type> inline void little_endian_to_host(type& /*value*/) { }
template<class type> inline void big_endian_to_host(type& value) { endian_swap(value); }
#else
template<class type> inline void host_to_little_endian(type& value) { endian_swap(value); }
template<class type> inline void host_to_big_endian(type& /*value*/) { }
template<class type> inline void little_endian_to_host(type& value) { endian_swap(value); }
template<class type> inline void big_endian_to_host(type& /*value*/) { }
#endif

inline uint32 buffer_to_uint32(uint8 buffer[4])
{
	return (uint32(buffer[0]) << 24) | (uint32(buffer[1]) << 16) | (uint32(buffer[2]) << 8) | buffer[3];
}