---

sysdata.h

#ifndef SIZEDTYPES_H
#define SIZEDTYPES_H
/*
 * __xx is ok: it doesn't pollute the POSIX namespace. Use these in the
 * header files exported to user space
 */
#ifdef USE_AUTOTOOLS
#include "config.h"
#endif


typedef signed char __s8;
typedef unsigned char __u8;

typedef signed short __s16;
typedef unsigned short __u16;

typedef signed int __s32;
typedef unsigned int __u32;

#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
//typedef __signed__ long long __s64;
//typedef unsigned long long __u64;
#endif


#define __swap16(x) \
        ((__u16)( \
                (((__u16)(x) & (__u16)0x00ffU) << 8) | \
                (((__u16)(x) & (__u16)0xff00U) >> 8) ))

                
#define __swap32(x) \
        ((__u32)( \
                (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
                (((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
                (((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
                (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))

                
#define __swap64(x) \
        ((__u64)( \
                (__u64)(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \
                (__u64)(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \
                (__u64)(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \
                (__u64)(((__u64)(x) & (__u64)0x00000000ff000000ULL) <<  8) | \
                   (__u64)(((__u64)(x) & (__u64)0x000000ff00000000ULL) >>  8) | \
                (__u64)(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \
                (__u64)(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \
                (__u64)(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56) ))
                



#ifndef WORDS_BIGENDIAN

#define swordtoarch16(x) (x)
#define swordtoarch32(x) (x)
#define swordtoarch64(x) (x)
#define archtosword16(x) (x)
#define archtosword32(x) (x)
#define archtosword64(x) (x)

#else 

#define swordtoarch16(x) __swap16(x)
#define swordtoarch32(x) __swap32(x)
#define swordtoarch64(x) __swap64(x)
#define archtosword16(x) __swap16(x)
#define archtosword32(x) __swap32(x)
#define archtosword64(x) __swap64(x)


#endif


#endif

---