FreeBSD/Linux Kernel Cross Reference
sys/EXTERNAL_HEADERS/stdint.h

     /*
      * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
      *
      * We build on <machine/types.h> rather than <sys/types.h> in order to
      * minimize the global namespace pollution (i.e., we'd like to define
      * *only* those identifiers that the C standard mandates should be
      * defined by <stdint.h>).   Using <machine/types.h> means that (at
      * least as of January 2001) all of the extra macros that do get
      * #defined by #include'ing <stdint.h> are in the implementor's
     * namespace ("_[A-Z].*" or "__.*").
     *
     * The reason that we do #include the relevant ...types.h instead of
     * creating several "competing" typedefs is to make header collisions
     * less likely during the transition to C99.
     *
     * Caveat:  There are still five extra typedef's defined by doing it
     * this way:  "u_int{8,16,32,64}_t" and "register_t".  Might be
     * fixable via pre- and post- #defines, but probably not worth it.
     */
    
    #ifndef _STDINT_H_
    #define _STDINT_H_
    
    #include <machine/types.h>
    
    /* from ISO/IEC 988:1999 spec */
    
    /* 7.18.1.1 Exact-width integer types */
                                             /* int8_t is defined in <machine/types.h> */
                                             /* int16_t is defined in <machine/types.h> */
                                             /* int32_t is defined in <machine/types.h> */
                                             /* int64_t is defined in <machine/types.h> */
    typedef u_int8_t              uint8_t;   /* u_int8_t is defined in <machine/types.h> */
    typedef u_int16_t            uint16_t;   /* u_int16_t is defined in <machine/types.h> */
    typedef u_int32_t            uint32_t;   /* u_int32_t is defined in <machine/types.h> */
    typedef u_int64_t            uint64_t;   /* u_int64_t is defined in <machine/types.h> */
    
    
    /* 7.18.1.2 Minumun-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-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 hgolding object pointers */
                                            /* intptr_t is defined in <machine/types.h> */
                                            /* uintptr_t is defined in <machine/types.h> */
    
    
    /* 7.18.1.5 Greatest-width integer types */
    typedef long long                intmax_t;
    typedef unsigned long long      uintmax_t;
    
    
    /* "C++ implementations should define these macros only when
     *  __STDC_LIMIT_MACROS is defined before <stdint.h> is included."
     * In other words, if C++, then __STDC_LIMIT_MACROS enables the
     * macros below.  (Note that there also exists a different enabling
     * macro (__STDC_CONSTANT_MACROS) for the last few, below.)
     */
    #if (! defined(__cplusplus)) || defined(__STDC_LIMIT_MACROS)
    
    
    /* 7.18.2 Limits of specified-width integer types:
     *   These #defines specify the minimum and maximum limits
     *   of each of the types declared above.
     */
    
    
    /* 7.18.2.1 Limits of exact-width integer types */
    #define INT8_MIN         (-127-1)
    #define INT16_MIN        (-32767-1)
    #define INT32_MIN        (-2147483647-1)
    #define INT64_MIN        (-9223372036854775807LL-1LL)
    
    #define INT8_MAX         +127
    #define INT16_MAX        +32767
    #define INT32_MAX        +2147483647
    #define INT64_MAX        +9223372036854775807LL
    
    #define UINT8_MAX         255
    #define UINT16_MAX        65535
    #define UINT32_MAX        4294967295U
   #define UINT64_MAX        18446744073709551615ULL
   
   /* 7.18.2.2 Limits of minimum-width integer types */
   #define INT_LEAST8_MIN    INT8_MIN
   #define INT_LEAST16_MIN   INT16_MIN
   #define INT_LEAST32_MIN   INT32_MIN
   #define INT_LEAST64_MIN   INT64_MIN
   
   #define INT_LEAST8_MAX    INT8_MAX
   #define INT_LEAST16_MAX   INT16_MAX
   #define INT_LEAST32_MAX   INT32_MAX
   #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_FAST16_MIN    INT16_MIN
   #define INT_FAST32_MIN    INT32_MIN
   #define INT_FAST64_MIN    INT64_MIN
   
   #define INT_FAST8_MAX     INT8_MAX
   #define INT_FAST16_MAX    INT16_MAX
   #define INT_FAST32_MAX    INT32_MAX
   #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 */
   #if defined(__LP64__)
   #define INTPTR_MIN        INT64_MIN
   #define INTPTR_MAX        INT64_MAX
   #define UINTPTR_MAX       UINT64_MAX
   #else
   #define INTPTR_MIN        INT32_MIN
   #define INTPTR_MAX        INT32_MAX
   #define UINTPTR_MAX       UINT32_MAX
   #endif
   
   /* 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 "Other" */
   #if defined(__LP64__)
   #define PTRDIFF_MIN       INT64_MIN
   #define PTRDIFF_MAX       INT64_MAX
   #else
   #define PTRDIFF_MIN       INT32_MIN
   #define PTRDIFF_MAX       INT32_MAX
   #endif
   /* We have no sig_atomic_t yet, so no SIG_ATOMIC_{MIN,MAX}.
      Should end up being {-127,127} or {0,255} ... or bigger.
      My bet would be on one of {U}INT32_{MIN,MAX}. */
   
   #define SIZE_MAX          UINT32_MAX
   
   #define WCHAR_MAX         INT32_MAX
   
   /* We have no wint_t yet, so no WINT_{MIN,MAX}.
      Should end up being {U}INT32_{MIN,MAX}, depending.  */
   
   
   #endif /* if C++, then __STDC_LIMIT_MACROS enables the above macros */
   
   /* "C++ implementations should define these macros only when
    *  __STDC_CONSTANT_MACROS is defined before <stdint.h> is included."
    */ 
   #if (! defined(__cplusplus)) || defined(__STDC_CONSTANT_MACROS)
   
   /* 7.18.4 Macros for integer constants */
   #define INT8_C(v)    ((int8_t)v)
   #define INT16_C(v)   ((int16_t)v)
   #define INT32_C(v)   (v ## L)
   #define INT64_C(v)   (v ## LL)
   
   #define UINT8_C(v)   ((uint8_t)v)
   #define UINT16_C(v)  ((uint16_t)v)
   #define UINT32_C(v)  (v ## UL)
   #define UINT64_C(v)  (v ## ULL)
   
   #define INTMAX_C(v)  (v ## LL)
   #define UINTMAX_C(v) (v ## ULL)
   
   #endif /* if C++, then __STDC_CONSTANT_MACROS enables the above macros */
   
   #endif /* _STDINT_H_ */

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