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  using ::uintmax_t;     

} // namespace boost

#elif defined(__FreeBSD__) && (__FreeBSD__ <= 4) || defined(__osf__)
// FreeBSD and Tru64 have an <inttypes.h> that contains much of what we need.
# include <inttypes.h>

namespace boost {

  using ::int8_t;             
  typedef int8_t int_least8_t;       
  typedef int8_t int_fast8_t;        
  using ::uint8_t;            
  typedef uint8_t uint_least8_t;      
  typedef uint8_t uint_fast8_t;       
                     
  using ::int16_t;            
  typedef int16_t int_least16_t;      
  typedef int16_t int_fast16_t;       
  using ::uint16_t;           
  typedef uint16_t uint_least16_t;     
  typedef uint16_t uint_fast16_t;      
                     
  using ::int32_t;            
  typedef int32_t int_least32_t;      
  typedef int32_t int_fast32_t;       
  using ::uint32_t;           
  typedef uint32_t uint_least32_t;     
  typedef uint32_t uint_fast32_t;      
         
# ifndef BOOST_NO_INT64_T          

  using ::int64_t;            
  typedef int64_t int_least64_t;      
  typedef int64_t int_fast64_t;       
  using ::uint64_t;           
  typedef uint64_t uint_least64_t;     
  typedef uint64_t uint_fast64_t;      

  typedef int64_t intmax_t;
  typedef uint64_t uintmax_t;

# else

  typedef int32_t intmax_t;
  typedef uint32_t uintmax_t;

# endif

} // namespace boost

#else  // BOOST_HAS_STDINT_H

# include <boost/limits.hpp> // implementation artifact; not part of interface


namespace boost
{

//  These are fairly safe guesses for some 16-bit, and most 32-bit and 64-bit
//  platforms.  For other systems, they will have to be hand tailored.
//
//  Because the fast types are assumed to be the same as the undecorated types,
//  it may be possible to hand tailor a more efficient implementation.  Such
//  an optimization may be illusionary; on the Intel x86-family 386 on, for
//  example, byte arithmetic and load/stores are as fast as "int" sized ones.

//  8-bit types  ------------------------------------------------------------//

# if UCHAR_MAX == 0xff
     typedef signed char     int8_t;
     typedef signed char     int_least8_t;
     typedef signed char     int_fast8_t;
     typedef unsigned char   uint8_t;
     typedef unsigned char   uint_least8_t;
     typedef unsigned char   uint_fast8_t;
# else
#    error defaults not correct; you must hand modify boost/cstdint.hpp
# endif

//  16-bit types  -----------------------------------------------------------//

# if USHRT_MAX == 0xffff
#  if defined(__crayx1)
     // The Cray X1 has a 16-bit short, however it is not recommend
     // for use in performance critical code.
     typedef short           int16_t;
     typedef short           int_least16_t;
     typedef int             int_fast16_t;
     typedef unsigned short  uint16_t;
     typedef unsigned short  uint_least16_t;
     typedef unsigned int    uint_fast16_t;
#  else
     typedef short           int16_t;
     typedef short           int_least16_t;
     typedef short           int_fast16_t;
     typedef unsigned short  uint16_t;
     typedef unsigned short  uint_least16_t;
     typedef unsigned short  uint_fast16_t;
#  endif
# elif (USHRT_MAX == 0xffffffff) && defined(CRAY)
     // no 16-bit types on Cray:
     typedef short           int_least16_t;
     typedef short           int_fast16_t;
     typedef unsigned short  uint_least16_t;
     typedef unsigned short  uint_fast16_t;
# else
#    error defaults not correct; you must hand modify boost/cstdint.hpp
# endif

//  32-bit types  -----------------------------------------------------------//

# if ULONG_MAX == 0xffffffff
     typedef long            int32_t;
     typedef long            int_least32_t;
     typedef long            int_fast32_t;
     typedef unsigned long   uint32_t;
     typedef unsigned long   uint_least32_t;
     typedef unsigned long   uint_fast32_t;
# elif UINT_MAX == 0xffffffff