oversim_byteswap.h

Go to the documentation of this file.

#ifndef OVERSIM_BYTESWAP_H
#define OVERSIM_BYTESWAP_H

#if not defined _WIN32 && not defined __APPLE__

#include <byteswap.h>

#else

#if defined __APPLE__
#include <libkern/OSByteOrder.h>
#define bswap_16(x) OSSwapInt16(x)
#define bswap_32(x) OSSwapInt32(x)
#define bswap_64(x) OSSwapInt64(x)

#else

#define bswap_16(x) (((x) << 8) & 0xff00) | (((x) >> 8 ) & 0xff)
#define bswap_32(x) (((x) << 24) & 0xff000000)  \
                    | (((x) << 8) & 0xff0000)   \
                    | (((x) >> 8) & 0xff00)     \
                    | (((x) >> 24) & 0xff )
#define bswap_64(x) ((((x) & 0xff00000000000000ull) >> 56) \
                    | (((x) & 0x00ff000000000000ull) >> 40) \
                    | (((x) & 0x0000ff0000000000ull) >> 24) \
                    | (((x) & 0x000000ff00000000ull) >> 8) \
                    | (((x) & 0x00000000ff000000ull) << 8) \
                    | (((x) & 0x0000000000ff0000ull) << 24) \
                    | (((x) & 0x000000000000ff00ull) << 40) \
                    | (((x) & 0x00000000000000ffull) << 56))
#endif
#endif
#endif