src/lib/cc/torint.h

   1 /* Copyright (c) 2003, Roger Dingledine
   2  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   3  * Copyright (c) 2007-2021, The Tor Project, Inc. */
   4 /* See LICENSE for licensing information */
   5
   6 /**
   7  * \file torint.h
   8  *
   9  * \brief Integer definitions used throughout Tor.
  10  **/
  11
  12 #ifndef TOR_TORINT_H
  13 #define TOR_TORINT_H
  14
  15 #include "orconfig.h"
  16
  17 #include <stdint.h>
  18 #include <stdbool.h>
  19 #include <limits.h>
  20
  21 #ifdef HAVE_SYS_TYPES_H
  22 #include <sys/types.h>
  23 #endif
  24 #ifdef HAVE_SYS_LIMITS_H
  25 #include <sys/limits.h>
  26 #endif
  27
  28 #ifndef SIZE_MAX
  29 #if SIZEOF_SIZE_T == 8
  30 #define SIZE_MAX UINT64_MAX
  31 #elif  SIZEOF_SIZE_T == 4
  32 #define SIZE_MAX UINT32_MAX
  33 #else
  34 #error "Can't define SIZE_MAX"
  35 #endif /* SIZEOF_SIZE_T == 8 || ... */
  36 #endif /* !defined(SIZE_MAX) */
  37
  38 #ifndef HAVE_SSIZE_T
  39 #if SIZEOF_SIZE_T == 8
  40 typedef int64_t ssize_t;
  41 #elif SIZEOF_SIZE_T == 4
  42 typedef int32_t ssize_t;
  43 #else
  44 #error "Can't define ssize_t."
  45 #endif /* SIZEOF_SIZE_T == 8 || ... */
  46 #endif /* !defined(HAVE_SSIZE_T) */
  47
  48 /* This assumes a sane (2's-complement) representation.  But if you
  49  * aren't 2's complement, and you don't define LONG_MAX, then you're so
  50  * bizarre that I want nothing to do with you. */
  51 #ifndef USING_TWOS_COMPLEMENT
  52 #error "Your platform doesn't use 2's complement arithmetic."
  53 #endif
  54
  55 #ifndef TIME_MAX
  56
  57 #if (SIZEOF_TIME_T == SIZEOF_INT)
  58 #define TIME_MAX ((time_t)INT_MAX)
  59 #elif (SIZEOF_TIME_T == SIZEOF_LONG)
  60 #define TIME_MAX ((time_t)LONG_MAX)
  61 #elif (SIZEOF_TIME_T == 8)
  62 #define TIME_MAX ((time_t)INT64_MAX)
  63 #else
  64 #error "Can't define TIME_MAX"
  65 #endif /* (SIZEOF_TIME_T == SIZEOF_INT) || ... */
  66
  67 #endif /* !defined(TIME_MAX) */
  68
  69 #ifndef TIME_MIN
  70
  71 #if (SIZEOF_TIME_T == SIZEOF_INT)
  72 #define TIME_MIN ((time_t)INT_MIN)
  73 #elif (SIZEOF_TIME_T == SIZEOF_LONG)
  74 #define TIME_MIN ((time_t)LONG_MIN)
  75 #elif (SIZEOF_TIME_T == 8)
  76 #define TIME_MIN ((time_t)INT64_MIN)
  77 #else
  78 #error "Can't define TIME_MIN"
  79 #endif /* (SIZEOF_TIME_T == SIZEOF_INT) || ... */
  80
  81 #endif /* !defined(TIME_MIN) */
  82
  83 #ifndef SIZE_MAX
  84 #if (SIZEOF_SIZE_T == 4)
  85 #define SIZE_MAX UINT32_MAX
  86 #elif (SIZEOF_SIZE_T == 8)
  87 #define SIZE_MAX UINT64_MAX
  88 #else
  89 #error "Can't define SIZE_MAX"
  90 #endif /* (SIZEOF_SIZE_T == 4) || ... */
  91 #endif /* !defined(SIZE_MAX) */
  92
  93 #ifdef _WIN32
  94 #  ifdef _WIN64
  95 #    define TOR_PRIuSZ PRIu64
  96 #  else
  97 #    define TOR_PRIuSZ PRIu32
  98 #  endif
  99 #else /* !defined(_WIN32) */
 100 #  define TOR_PRIuSZ "zu"
 101 #endif /* defined(_WIN32) */
 102
 103 #ifdef _WIN32
 104 #  ifdef _WIN64
 105 #    define TOR_PRIdSZ PRId64
 106 #  else
 107 #    define TOR_PRIdSZ PRId32
 108 #  endif
 109 #else /* !defined(_WIN32) */
 110 #  define TOR_PRIdSZ "zd"
 111 #endif /* defined(_WIN32) */
 112
 113 #ifndef SSIZE_MAX
 114 #if (SIZEOF_SIZE_T == 4)
 115 #define SSIZE_MAX INT32_MAX
 116 #elif (SIZEOF_SIZE_T == 8)
 117 #define SSIZE_MAX INT64_MAX
 118 #else
 119 #error "Can't define SSIZE_MAX"
 120 #endif /* (SIZEOF_SIZE_T == 4) || ... */
 121 #endif /* !defined(SSIZE_MAX) */
 122
 123 /** Any ssize_t larger than this amount is likely to be an underflow. */
 124 #define SSIZE_T_CEILING ((ssize_t)(SSIZE_MAX-16))
 125 /** Any size_t larger than this amount is likely to be an underflow. */
 126 #define SIZE_T_CEILING  ((size_t)(SSIZE_MAX-16))
 127
 128 #if SIZEOF_INT > SIZEOF_VOID_P
 129 #error "sizeof(int) > sizeof(void *) - Can't build Tor here."
 130 #endif
 131
 132 #if SIZEOF_UNSIGNED_INT > SIZEOF_VOID_P
 133 #error "sizeof(unsigned int) > sizeof(void *) - Can't build Tor here."
 134 #endif
 135
 136 #endif /* !defined(TOR_TORINT_H) */