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64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file endian_func.hpp Function to handling different endian machines. */
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#ifndef ENDIAN_FUNC_HPP
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#define ENDIAN_FUNC_HPP
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#include "endian_type.hpp"
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#include "bitmath_func.hpp"
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/* Setup alignment and conversion macros */
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#if TTD_ENDIAN == 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 FROM_BE64(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 TO_BE64(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 FROM_LE64(x) BSWAP64(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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#define TO_LE64(x) BSWAP64(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 FROM_BE64(x) BSWAP64(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 TO_BE64(x) BSWAP64(x)
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#define FROM_LE16(x) (x)
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#define FROM_LE32(x) (x)
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#define FROM_LE64(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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#define TO_LE64(x) (x)
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#endif /* TTD_ENDIAN == TTD_BIG_ENDIAN */
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inline uint16_t 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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inline uint16_t ReadLE16Unaligned(const void *x)
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{
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#if OTTD_ALIGNMENT == 1
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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 /* OTTD_ALIGNMENT == 1 */
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}
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#endif /* ENDIAN_FUNC_HPP */
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