mirror of https://github.com/sm64pc/sm64pc.git
118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/*
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Audio File Library
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Copyright (C) 1998-1999, 2010-2011, Michael Pruett <michael@68k.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA
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*/
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#ifndef BYTEORDER_H
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#define BYTEORDER_H
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#include "config.h"
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#include <stdint.h>
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#if WORDS_BIGENDIAN
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#define _AF_BYTEORDER_NATIVE (AF_BYTEORDER_BIGENDIAN)
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#else
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#define _AF_BYTEORDER_NATIVE (AF_BYTEORDER_LITTLEENDIAN)
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#endif
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inline uint16_t _af_byteswap_int16 (uint16_t x)
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{
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return (x >> 8) | (x << 8);
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}
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inline uint32_t _af_byteswap_int32 (uint32_t x)
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{
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return ((x & 0x000000ffU) << 24) |
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((x & 0x0000ff00U) << 8) |
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((x & 0x00ff0000U) >> 8) |
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((x & 0xff000000U) >> 24);
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}
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inline uint64_t _af_byteswap_int64 (uint64_t x)
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{
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return ((x & 0x00000000000000ffULL) << 56) |
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((x & 0x000000000000ff00ULL) << 40) |
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((x & 0x0000000000ff0000ULL) << 24) |
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((x & 0x00000000ff000000ULL) << 8) |
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((x & 0x000000ff00000000ULL) >> 8) |
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((x & 0x0000ff0000000000ULL) >> 24) |
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((x & 0x00ff000000000000ULL) >> 40) |
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((x & 0xff00000000000000ULL) >> 56);
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}
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inline float _af_byteswap_float32 (float x)
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{
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union
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{
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uint32_t i;
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float f;
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} u;
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u.f = x;
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u.i = _af_byteswap_int32(u.i);
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return u.f;
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}
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inline double _af_byteswap_float64 (double x)
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{
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union
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{
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uint64_t i;
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double f;
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} u;
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u.f = x;
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u.i = _af_byteswap_int64(u.i);
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return u.f;
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}
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inline uint64_t byteswap(uint64_t value) { return _af_byteswap_int64(value); }
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inline int64_t byteswap(int64_t value) { return _af_byteswap_int64(value); }
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inline uint32_t byteswap(uint32_t value) { return _af_byteswap_int32(value); }
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inline int32_t byteswap(int32_t value) { return _af_byteswap_int32(value); }
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inline uint16_t byteswap(uint16_t value) { return _af_byteswap_int16(value); }
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inline int16_t byteswap(int16_t value) { return _af_byteswap_int16(value); }
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inline double byteswap(double value) { return _af_byteswap_float64(value); }
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inline float byteswap(float value) { return _af_byteswap_float32(value); }
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template <typename T>
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T bigToHost(T value)
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{
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return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_BIGENDIAN ? value : byteswap(value);
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}
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template <typename T>
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T littleToHost(T value)
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{
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return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_LITTLEENDIAN ? value : byteswap(value);
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}
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template <typename T>
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T hostToBig(T value)
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{
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return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_BIGENDIAN ? value : byteswap(value);
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}
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template <typename T>
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T hostToLittle(T value)
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{
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return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_LITTLEENDIAN ? value : byteswap(value);
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}
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#endif
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