cpp/openttd-patchpack/source Files · src/core/endian_func.hpp

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r8781:bd977c904a17 1.6 KiB text/x-c++hdr Show Annotation Show as Raw Download as Raw

bjarni

(svn r12482) -Fix: [build train] we don't need to have a depot in order to just check the price of a rail vehicle so don't check for compatible rails on the tile either
also wagons will only need tracks they can drive on in order to be build so there is no reason to check for power in the depot

/* $Id$ */

/** @file endian_func.hpp */

#ifndef ENDIAN_FUNC_H
#define ENDIAN_FUNC_H

#include "bitmath_func.hpp"

#if defined(ARM) || defined(__arm__) || defined(__alpha__)
	#define OTTD_ALIGNMENT
#endif

/* Windows has always LITTLE_ENDIAN */
#if defined(WIN32) || defined(__OS2__) || defined(WIN64)
	#define TTD_LITTLE_ENDIAN
#elif !defined(TESTING)
	/* Else include endian[target/host].h, which has the endian-type, autodetected by the Makefile */
	#if defined(STRGEN)
		#include "endian_host.h"
	#else
		#include "endian_target.h"
	#endif
#endif /* WIN32 || __OS2__ || WIN64 */

/* Setup alignment and conversion macros */
#if defined(TTD_BIG_ENDIAN)
	#define FROM_BE16(x) (x)
	#define FROM_BE32(x) (x)
	#define TO_BE16(x)   (x)
	#define TO_BE32(x)   (x)
	#define TO_BE32X(x)  (x)
	#define FROM_LE16(x) BSWAP16(x)
	#define FROM_LE32(x) BSWAP32(x)
	#define TO_LE16(x)   BSWAP16(x)
	#define TO_LE32(x)   BSWAP32(x)
	#define TO_LE32X(x)  BSWAP32(x)
#else
	#define FROM_BE16(x) BSWAP16(x)
	#define FROM_BE32(x) BSWAP32(x)
	#define TO_BE16(x)   BSWAP16(x)
	#define TO_BE32(x)   BSWAP32(x)
	#define TO_BE32X(x)  BSWAP32(x)
	#define FROM_LE16(x) (x)
	#define FROM_LE32(x) (x)
	#define TO_LE16(x)   (x)
	#define TO_LE32(x)   (x)
	#define TO_LE32X(x)  (x)
#endif /* TTD_BIG_ENDIAN */

static inline uint16 ReadLE16Aligned(const void *x)
{
	return FROM_LE16(*(const uint16*)x);
}

static inline uint16 ReadLE16Unaligned(const void *x)
{
#ifdef OTTD_ALIGNMENT
	return ((const byte*)x)[0] | ((const byte*)x)[1] << 8;
#else
	return FROM_LE16(*(const uint16*)x);
#endif
}

#endif /* ENDIAN_FUNC_HPP */