118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/*
|
|
Audio File Library
|
|
Copyright (C) 1998-1999, 2010-2011, Michael Pruett <michael@68k.org>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library 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. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef BYTEORDER_H
|
|
#define BYTEORDER_H
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#if WORDS_BIGENDIAN
|
|
#define _AF_BYTEORDER_NATIVE (AF_BYTEORDER_BIGENDIAN)
|
|
#else
|
|
#define _AF_BYTEORDER_NATIVE (AF_BYTEORDER_LITTLEENDIAN)
|
|
#endif
|
|
|
|
inline uint16_t _af_byteswap_int16 (uint16_t x)
|
|
{
|
|
return (x >> 8) | (x << 8);
|
|
}
|
|
|
|
inline uint32_t _af_byteswap_int32 (uint32_t x)
|
|
{
|
|
return ((x & 0x000000ffU) << 24) |
|
|
((x & 0x0000ff00U) << 8) |
|
|
((x & 0x00ff0000U) >> 8) |
|
|
((x & 0xff000000U) >> 24);
|
|
}
|
|
|
|
inline uint64_t _af_byteswap_int64 (uint64_t x)
|
|
{
|
|
return ((x & 0x00000000000000ffULL) << 56) |
|
|
((x & 0x000000000000ff00ULL) << 40) |
|
|
((x & 0x0000000000ff0000ULL) << 24) |
|
|
((x & 0x00000000ff000000ULL) << 8) |
|
|
((x & 0x000000ff00000000ULL) >> 8) |
|
|
((x & 0x0000ff0000000000ULL) >> 24) |
|
|
((x & 0x00ff000000000000ULL) >> 40) |
|
|
((x & 0xff00000000000000ULL) >> 56);
|
|
}
|
|
|
|
inline float _af_byteswap_float32 (float x)
|
|
{
|
|
union
|
|
{
|
|
uint32_t i;
|
|
float f;
|
|
} u;
|
|
u.f = x;
|
|
u.i = _af_byteswap_int32(u.i);
|
|
return u.f;
|
|
}
|
|
|
|
inline double _af_byteswap_float64 (double x)
|
|
{
|
|
union
|
|
{
|
|
uint64_t i;
|
|
double f;
|
|
} u;
|
|
u.f = x;
|
|
u.i = _af_byteswap_int64(u.i);
|
|
return u.f;
|
|
}
|
|
|
|
inline uint64_t byteswap(uint64_t value) { return _af_byteswap_int64(value); }
|
|
inline int64_t byteswap(int64_t value) { return _af_byteswap_int64(value); }
|
|
inline uint32_t byteswap(uint32_t value) { return _af_byteswap_int32(value); }
|
|
inline int32_t byteswap(int32_t value) { return _af_byteswap_int32(value); }
|
|
inline uint16_t byteswap(uint16_t value) { return _af_byteswap_int16(value); }
|
|
inline int16_t byteswap(int16_t value) { return _af_byteswap_int16(value); }
|
|
|
|
inline double byteswap(double value) { return _af_byteswap_float64(value); }
|
|
inline float byteswap(float value) { return _af_byteswap_float32(value); }
|
|
|
|
template <typename T>
|
|
T bigToHost(T value)
|
|
{
|
|
return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_BIGENDIAN ? value : byteswap(value);
|
|
}
|
|
|
|
template <typename T>
|
|
T littleToHost(T value)
|
|
{
|
|
return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_LITTLEENDIAN ? value : byteswap(value);
|
|
}
|
|
|
|
template <typename T>
|
|
T hostToBig(T value)
|
|
{
|
|
return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_BIGENDIAN ? value : byteswap(value);
|
|
}
|
|
|
|
template <typename T>
|
|
T hostToLittle(T value)
|
|
{
|
|
return _AF_BYTEORDER_NATIVE == AF_BYTEORDER_LITTLEENDIAN ? value : byteswap(value);
|
|
}
|
|
|
|
#endif
|