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66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
/* $Id$ */
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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 */
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