数据类型变换uint8_t uint16_t等等

#include <limits.h>#ifdef WIN32#include <windows.h>#endif /* WIN32 */#ifdef _MSC_VER /* WIN32 *//* from http://code.google.com/p/msinttypes/ */#if _MSC_VER > 1000#pragma once#endif#if (_MSC_VER < 1300)   typedef signed char       int8_t;   typedef signed short      int16_t;   typedef signed int        int32_t;   typedef unsigned char     uint8_t;   typedef unsigned short    uint16_t;   typedef unsigned int      uint32_t;#else   typedef signed __int8     int8_t;   typedef signed __int16    int16_t;   typedef signed __int32    int32_t;   typedef unsigned __int8   uint8_t;   typedef unsigned __int16  uint16_t;   typedef unsigned __int32  uint32_t;#endiftypedef signed __int64       int64_t;typedef unsigned __int64     uint64_t;/********************************/#else /* *nix *//* C99 compiler has this head file */#include <stdint.h>/* do not nee this */#if 0/* part of stdint.h from GNU C Library *//* __WORDSIZE defined in <bits/wordsize.h> */#ifndef __int8_t_defined# define __int8_t_definedtypedef signed char        int8_t;typedef short int        int16_t;typedef int            int32_t;# if __WORDSIZE == 64typedef long int        int64_t;# else__extension__typedef long long int        int64_t;# endif#endiftypedef unsigned char        uint8_t;typedef unsigned short int    uint16_t;#ifndef __uint32_t_definedtypedef unsigned int        uint32_t;# define __uint32_t_defined#endif#if __WORDSIZE == 64typedef unsigned long int    uint64_t;#else__extension__typedef unsigned long long int    uint64_t;#endif#endif  /* #if 0 */#endif /* _MSC_VER *//********************************/typedef int8_t      int8;typedef int8_t      INT8;typedef uint8_t     uint8;typedef uint8_t     u8;typedef uint8_t     UINT8;typedef int16_t     int16;typedef int16_t     INT16;typedef uint16_t    uint16;typedef uint16_t    u16;typedef uint16_t    UINT16;typedef uint16_t    WORD16;typedef int32_t     int32;typedef int32_t     INT32;typedef uint32_t    uint32;typedef uint32_t    u32;typedef uint32_t    UINT32;typedef uint32_t    WORD32;typedef int64_t     int64;typedef int64_t     INT64;typedef uint64_t    uint64;typedef uint64_t    u64;typedef uint64_t    UINT64;typedef uint64_t    ULONG64;typedef uint64_t    WORD64;typedef uint64_t    DWORD64;