text: #ifndef _STDINT_H_ALL_
  #define _STDINT_H_ALL_
  
  // _STDINT_H_SYS_: 编译器是否提供了<stdint.h>
  #undef _STDINT_H_SYS_
  #if defined(__GNUC__)	// GCC.
  	#define _STDINT_H_SYS_
  #elif defined(_MSC_VER)	// MSVC. VC6至VC2005均没有, 似乎从VC2010才支持的.
  	#if _MSC_VER >=1600	// VC2010
  		#define _STDINT_H_SYS_
  	#endif	// #if _MSC_VER >=1600	// VC2010
  #elif defined(__BORLANDC__)	// BCB. BCB6是支持的.
  	#if __BORLANDC__ >=0x0560	// BCB6
  		#define _STDINT_H_SYS_
  	#endif	// #if __BORLANDC__ >=0x0560	// BCB6
  #else
  	#define _INTTYPES_H_SYS_	// 假设其他编译器支持C99.
  #endif	// _STDINT_H_SYS_
  
  
  #ifdef _STDINT_H_SYS_
  // 使用编译器提供的<stdint.h>
  #include <stdint.h>
  #else
  // 采用自定义的stdint.h. 参考了 msinttypes: http://code.google.com/p/msinttypes/
  #ifndef _MSC_STDINT_H_ // [
  #define _MSC_STDINT_H_
  
  #include <limits.h>
  
  // For Visual Studio 6 in C++ mode and for many Visual Studio versions when
  // compiling for ARM we should wrap <wchar.h> include with 'extern "C++" {}'
  // or compiler give many errors like this:
  //   error C2733: second C linkage of overloaded function 'wmemchr' not allowed
  //#ifdef __cplusplus
  //extern "C" {
  //#endif
  //#  include <wchar.h>
  //#ifdef __cplusplus
  //}
  //#endif
  // 在VC6下测试时, 发现上面的方法会报告很多C2733错误. 还是直接include算了.
  #include <wchar.h>
  
  // Define _W64 macros to mark types changing their size, like intptr_t.
  #ifndef _W64
  #  if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
  #     define _W64 __w64
  #  else
  #     define _W64
  #  endif
  #endif
  
  
  // 7.18.1 Integer types
  
  // 7.18.1.1 Exact-width integer types
  
  // Visual Studio 6 and Embedded Visual C++ 4 doesn't
  // realize that, e.g. char has the same size as __int8
  // so we give up on __intX for them.
  #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;
  #endif
  typedef signed __int64       int64_t;
  typedef unsigned __int64     uint64_t;
  
  
  // 7.18.1.2 Minimum-width integer types
  typedef int8_t    int_least8_t;
  typedef int16_t   int_least16_t;
  typedef int32_t   int_least32_t;
  typedef int64_t   int_least64_t;
  typedef uint8_t   uint_least8_t;
  typedef uint16_t  uint_least16_t;
  typedef uint32_t  uint_least32_t;
  typedef uint64_t  uint_least64_t;
  
  // 7.18.1.3 Fastest minimum-width integer types
  typedef int8_t    int_fast8_t;
  typedef int16_t   int_fast16_t;
  typedef int32_t   int_fast32_t;
  typedef int64_t   int_fast64_t;
  typedef uint8_t   uint_fast8_t;
  typedef uint16_t  uint_fast16_t;
  typedef uint32_t  uint_fast32_t;
  typedef uint64_t  uint_fast64_t;
  
  // 7.18.1.4 Integer types capable of holding object pointers
  #ifdef _WIN64 // [
     typedef signed __int64    intptr_t;
     typedef unsigned __int64  uintptr_t;
  #else // _WIN64 ][
     typedef _W64 signed int   intptr_t;
     typedef _W64 unsigned int uintptr_t;
  #endif // _WIN64 ]
  
  // 7.18.1.5 Greatest-width integer types
  typedef int64_t   intmax_t;
  typedef uint64_t  uintmax_t;
  
  
  // 7.18.2 Limits of specified-width integer types
  
  #if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [   See footnote 220 at page 257 and footnote 221 at page 259
  
  // 7.18.2.1 Limits of exact-width integer types
  #define INT8_MIN     ((int8_t)_I8_MIN)
  #define INT8_MAX     _I8_MAX
  #define INT16_MIN    ((int16_t)_I16_MIN)
  #define INT16_MAX    _I16_MAX
  #define INT32_MIN    ((int32_t)_I32_MIN)
  #define INT32_MAX    _I32_MAX
  #define INT64_MIN    ((int64_t)_I64_MIN)
  #define INT64_MAX    _I64_MAX
  #define UINT8_MAX    _UI8_MAX
  #define UINT16_MAX   _UI16_MAX
  #define UINT32_MAX   _UI32_MAX
  #define UINT64_MAX   _UI64_MAX
  
  // 7.18.2.2 Limits of minimum-width integer types
  #define INT_LEAST8_MIN    INT8_MIN
  #define INT_LEAST8_MAX    INT8_MAX
  #define INT_LEAST16_MIN   INT16_MIN
  #define INT_LEAST16_MAX   INT16_MAX
  #define INT_LEAST32_MIN   INT32_MIN
  #define INT_LEAST32_MAX   INT32_MAX
  #define INT_LEAST64_MIN   INT64_MIN
  #define INT_LEAST64_MAX   INT64_MAX
  #define UINT_LEAST8_MAX   UINT8_MAX
  #define UINT_LEAST16_MAX  UINT16_MAX
  #define UINT_LEAST32_MAX  UINT32_MAX
  #define UINT_LEAST64_MAX  UINT64_MAX
  
  // 7.18.2.3 Limits of fastest minimum-width integer types
  #define INT_FAST8_MIN    INT8_MIN
  #define INT_FAST8_MAX    INT8_MAX
  #define INT_FAST16_MIN   INT16_MIN
  #define INT_FAST16_MAX   INT16_MAX
  #define INT_FAST32_MIN   INT32_MIN
  #define INT_FAST32_MAX   INT32_MAX
  #define INT_FAST64_MIN   INT64_MIN
  #define INT_FAST64_MAX   INT64_MAX
  #define UINT_FAST8_MAX   UINT8_MAX
  #define UINT_FAST16_MAX  UINT16_MAX
  #define UINT_FAST32_MAX  UINT32_MAX
  #define UINT_FAST64_MAX  UINT64_MAX
  
  // 7.18.2.4 Limits of integer types capable of holding object pointers
  #ifdef _WIN64 // [
  #  define INTPTR_MIN   INT64_MIN
  #  define INTPTR_MAX   INT64_MAX
  #  define UINTPTR_MAX  UINT64_MAX
  #else // _WIN64 ][
  #  define INTPTR_MIN   INT32_MIN
  #  define INTPTR_MAX   INT32_MAX
  #  define UINTPTR_MAX  UINT32_MAX
  #endif // _WIN64 ]
  
  // 7.18.2.5 Limits of greatest-width integer types
  #define INTMAX_MIN   INT64_MIN
  #define INTMAX_MAX   INT64_MAX
  #define UINTMAX_MAX  UINT64_MAX
  
  // 7.18.3 Limits of other integer types
  
  #ifdef _WIN64 // [
  #  define PTRDIFF_MIN  _I64_MIN
  #  define PTRDIFF_MAX  _I64_MAX
  #else  // _WIN64 ][
  #  define PTRDIFF_MIN  _I32_MIN
  #  define PTRDIFF_MAX  _I32_MAX
  #endif  // _WIN64 ]
  
  #define SIG_ATOMIC_MIN  INT_MIN
  #define SIG_ATOMIC_MAX  INT_MAX
  
  #ifndef SIZE_MAX // [
  #  ifdef _WIN64 // [
  #     define SIZE_MAX  _UI64_MAX
  #  else // _WIN64 ][
  #     define SIZE_MAX  _UI32_MAX
  #  endif // _WIN64 ]
  #endif // SIZE_MAX ]
  
  // WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
  #ifndef WCHAR_MIN // [
  #  define WCHAR_MIN  0
  #endif  // WCHAR_MIN ]
  #ifndef WCHAR_MAX // [
  #  define WCHAR_MAX  _UI16_MAX
  #endif  // WCHAR_MAX ]
  
  #define WINT_MIN  0
  #define WINT_MAX  _UI16_MAX
  
  #endif // __STDC_LIMIT_MACROS ]
  
  
  // 7.18.4 Limits of other integer types
  
  #if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [   See footnote 224 at page 260
  
  // 7.18.4.1 Macros for minimum-width integer constants
  
  #define INT8_C(val)  val##i8
  #define INT16_C(val) val##i16
  #define INT32_C(val) val##i32
  #define INT64_C(val) val##i64
  
  #define UINT8_C(val)  val##ui8
  #define UINT16_C(val) val##ui16
  #define UINT32_C(val) val##ui32
  #define UINT64_C(val) val##ui64
  
  // 7.18.4.2 Macros for greatest-width integer constants
  #define INTMAX_C   INT64_C
  #define UINTMAX_C  UINT64_C
  
  #endif // __STDC_CONSTANT_MACROS ]
  
  
  #endif // _MSC_STDINT_H_ ]
  
  #endif // #ifdef _STDINT_H_SYS_
  
  #endif // #ifndef _STDINT_H_ALL_
  