EXTERNAL_HEADERS/stdint.h

   1 /*
   2  * Copyright (c) 2000,2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * We build on <machine/types.h> rather than <sys/types.h> in order to
   5  * minimize the global namespace pollution (i.e., we'd like to define
   6  * *only* those identifiers that the C standard mandates should be
   7  * defined by <stdint.h>).   Using <machine/types.h> means that (at
   8  * least as of January 2001) all of the extra macros that do get
   9  * #defined by #include'ing <stdint.h> are in the implementor's
  10  * namespace ("_[A-Z].*" or "__.*").
  11  *
  12  * The reason that we do #include the relevant ...types.h instead of
  13  * creating several "competing" typedefs is to make header collisions
  14  * less likely during the transition to C99.
  15  *
  16  * Caveat:  There are still five extra typedef's defined by doing it
  17  * this way:  "u_int{8,16,32,64}_t" and "register_t".  Might be
  18  * fixable via pre- and post- #defines, but probably not worth it.
  19  */
  20
  21 #ifndef _STDINT_H_
  22 #define _STDINT_H_
  23
  24 #include <machine/types.h>
  25
  26 /* from ISO/IEC 988:1999 spec */
  27
  28 /* 7.18.1.1 Exact-width integer types */
  29                                          /* int8_t is defined in <machine/types.h> */
  30                                          /* int16_t is defined in <machine/types.h> */
  31                                          /* int32_t is defined in <machine/types.h> */
  32                                          /* int64_t is defined in <machine/types.h> */
  33 typedef u_int8_t              uint8_t;   /* u_int8_t is defined in <machine/types.h> */
  34 typedef u_int16_t            uint16_t;   /* u_int16_t is defined in <machine/types.h> */
  35 typedef u_int32_t            uint32_t;   /* u_int32_t is defined in <machine/types.h> */
  36 typedef u_int64_t            uint64_t;   /* u_int64_t is defined in <machine/types.h> */
  37
  38
  39 /* 7.18.1.2 Minumun-width integer types */
  40 typedef int8_t           int_least8_t;
  41 typedef int16_t         int_least16_t;
  42 typedef int32_t         int_least32_t;
  43 typedef int64_t         int_least64_t;
  44 typedef uint8_t         uint_least8_t;
  45 typedef uint16_t       uint_least16_t;
  46 typedef uint32_t       uint_least32_t;
  47 typedef uint64_t       uint_least64_t;
  48
  49
  50 /* 7.18.1.3 Fastest-width integer types */
  51 typedef int8_t            int_fast8_t;
  52 typedef int16_t          int_fast16_t;
  53 typedef int32_t          int_fast32_t;
  54 typedef int64_t          int_fast64_t;
  55 typedef uint8_t          uint_fast8_t;
  56 typedef uint16_t        uint_fast16_t;
  57 typedef uint32_t        uint_fast32_t;
  58 typedef uint64_t        uint_fast64_t;
  59
  60
  61 /* 7.18.1.4 Integer types capable of hgolding object pointers */
  62                                         /* intptr_t is defined in <machine/types.h> */
  63                                         /* uintptr_t is defined in <machine/types.h> */
  64
  65
  66 /* 7.18.1.5 Greatest-width integer types */
  67 typedef long long                intmax_t;
  68 typedef unsigned long long      uintmax_t;
  69
  70
  71 /* "C++ implementations should define these macros only when
  72  *  __STDC_LIMIT_MACROS is defined before <stdint.h> is included."
  73  * In other words, if C++, then __STDC_LIMIT_MACROS enables the
  74  * macros below.  (Note that there also exists a different enabling
  75  * macro (__STDC_CONSTANT_MACROS) for the last few, below.)
  76  */
  77 #if (! defined(__cplusplus)) || defined(__STDC_LIMIT_MACROS)
  78
  79
  80 /* 7.18.2 Limits of specified-width integer types:
  81  *   These #defines specify the minimum and maximum limits
  82  *   of each of the types declared above.
  83  */
  84
  85
  86 /* 7.18.2.1 Limits of exact-width integer types */
  87 #define INT8_MIN         -128
  88 #define INT16_MIN        -32768
  89 #define INT32_MIN        -2147483648
  90 #define INT64_MIN        -9223372036854775808LL
  91
  92 #define INT8_MAX         +127
  93 #define INT16_MAX        +32767
  94 #define INT32_MAX        +2147483647
  95 #define INT64_MAX        +9223372036854775807LL
  96
  97 #define UINT8_MAX         255
  98 #define UINT16_MAX        65535
  99 #define UINT32_MAX        4294967295U
 100 #define UINT64_MAX        18446744073709551615ULL
 101
 102 /* 7.18.2.2 Limits of minimum-width integer types */
 103 #define INT_LEAST8_MIN    INT8_MIN
 104 #define INT_LEAST16_MIN   INT16_MIN
 105 #define INT_LEAST32_MIN   INT32_MIN
 106 #define INT_LEAST64_MIN   INT64_MIN
 107
 108 #define INT_LEAST8_MAX    INT8_MAX
 109 #define INT_LEAST16_MAX   INT16_MAX
 110 #define INT_LEAST32_MAX   INT32_MAX
 111 #define INT_LEAST64_MAX   INT64_MAX
 112
 113 #define UINT_LEAST8_MAX   UINT8_MAX
 114 #define UINT_LEAST16_MAX  UINT16_MAX
 115 #define UINT_LEAST32_MAX  UINT32_MAX
 116 #define UINT_LEAST64_MAX  UINT64_MAX
 117
 118 /* 7.18.2.3 Limits of fastest minimum-width integer types */
 119 #define INT_FAST8_MIN     INT8_MIN
 120 #define INT_FAST16_MIN    INT16_MIN
 121 #define INT_FAST32_MIN    INT32_MIN
 122 #define INT_FAST64_MIN    INT64_MIN
 123
 124 #define INT_FAST8_MAX     INT8_MAX
 125 #define INT_FAST16_MAX    INT16_MAX
 126 #define INT_FAST32_MAX    INT32_MAX
 127 #define INT_FAST64_MAX    INT64_MAX
 128
 129 #define UINT_FAST8_MAX    UINT8_MAX
 130 #define UINT_FAST16_MAX   UINT16_MAX
 131 #define UINT_FAST32_MAX   UINT32_MAX
 132 #define UINT_FAST64_MAX   UINT64_MAX
 133
 134 /* 7.18.2.4 Limits of integer types capable of holding object pointers */
 135
 136 #define INTPTR_MIN        INT32_MIN
 137 #define INTPTR_MAX        INT32_MAX
 138
 139 #define UINTPTR_MAX       UINT32_MAX
 140
 141 /* 7.18.2.5 Limits of greatest-width integer types */
 142 #define INTMAX_MIN        INT64_MIN
 143 #define INTMAX_MAX        INT64_MAX
 144
 145 #define UINTMAX_MAX       UINT64_MAX
 146
 147 /* 7.18.3 "Other" */
 148 #define PTRDIFF_MIN       INT32_MIN
 149 #define PTRDIFF_MAX       INT32_MAX
 150
 151 /* We have no sig_atomic_t yet, so no SIG_ATOMIC_{MIN,MAX}.
 152    Should end up being {-127,127} or {0,255} ... or bigger.
 153    My bet would be on one of {U}INT32_{MIN,MAX}. */
 154
 155 #define SIZE_MAX          UINT32_MAX
 156
 157 #define WCHAR_MAX         INT32_MAX
 158
 159 /* We have no wint_t yet, so no WINT_{MIN,MAX}.
 160    Should end up being {U}INT32_{MIN,MAX}, depending.  */
 161
 162
 163 #endif /* if C++, then __STDC_LIMIT_MACROS enables the above macros */
 164
 165 /* "C++ implementations should define these macros only when
 166  *  __STDC_CONSTANT_MACROS is defined before <stdint.h> is included."
 167  */
 168 #if (! defined(__cplusplus)) || defined(__STDC_CONSTANT_MACROS)
 169
 170 /* 7.18.4 Macros for integer constants */
 171 #define INT8_C(v)    ((int8_t)v)
 172 #define INT16_C(v)   ((int16_t)v)
 173 #define INT32_C(v)   (v ## L)
 174 #define INT64_C(v)   (v ## LL)
 175
 176 #define UINT8_C(v)   ((uint8_t)v)
 177 #define UINT16_C(v)  ((uint16_t)v)
 178 #define UINT32_C(v)  (v ## UL)
 179 #define UINT64_C(v)  (v ## ULL)
 180
 181 #define INTMAX_C(v)  (v ## LL)
 182 #define UINTMAX_C(v) (v ## ULL)
 183
 184 #endif /* if C++, then __STDC_CONSTANT_MACROS enables the above macros */
 185
 186 #endif /* _STDINT_H_ */