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/* $Id$ */

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/** @file endian_func.hpp Function to handling different endian machines. */

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#ifndef ENDIAN_FUNC_H

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#define ENDIAN_FUNC_H

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#include "bitmath_func.hpp"

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#if defined(ARM) || defined(__arm__) || defined(__alpha__)

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	#define OTTD_ALIGNMENT

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#endif

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/* Windows has always LITTLE_ENDIAN */

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#if defined(WIN32) || defined(__OS2__) || defined(WIN64)

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	#define TTD_LITTLE_ENDIAN

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#elif !defined(TESTING)

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	/* Else include endian[target/host].h, which has the endian-type, autodetected by the Makefile */

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	#if defined(STRGEN)

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		#include "endian_host.h"

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	#else

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		#include "endian_target.h"

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	#endif

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#endif /* WIN32 || __OS2__ || WIN64 */

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/* Setup alignment and conversion macros */

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#if defined(TTD_BIG_ENDIAN)

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	#define FROM_BE16(x) (x)

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	#define FROM_BE32(x) (x)

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	#define TO_BE16(x)   (x)

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	#define TO_BE32(x)   (x)

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	#define TO_BE32X(x)  (x)

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	#define FROM_LE16(x) BSWAP16(x)

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	#define FROM_LE32(x) BSWAP32(x)

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	#define TO_LE16(x)   BSWAP16(x)

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	#define TO_LE32(x)   BSWAP32(x)

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	#define TO_LE32X(x)  BSWAP32(x)

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#else

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	#define FROM_BE16(x) BSWAP16(x)

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	#define FROM_BE32(x) BSWAP32(x)

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	#define TO_BE16(x)   BSWAP16(x)

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	#define TO_BE32(x)   BSWAP32(x)

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	#define TO_BE32X(x)  BSWAP32(x)

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	#define FROM_LE16(x) (x)

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	#define FROM_LE32(x) (x)

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	#define TO_LE16(x)   (x)

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	#define TO_LE32(x)   (x)

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	#define TO_LE32X(x)  (x)

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#endif /* TTD_BIG_ENDIAN */

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static inline uint16 ReadLE16Aligned(const void *x)

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{

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	return FROM_LE16(*(const uint16*)x);

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}

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static inline uint16 ReadLE16Unaligned(const void *x)

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{

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#ifdef OTTD_ALIGNMENT

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	return ((const byte*)x)[0] | ((const byte*)x)[1] << 8;

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#else

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	return FROM_LE16(*(const uint16*)x);

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#endif

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}

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#endif /* ENDIAN_FUNC_HPP */