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/* Copyright (c) 2003, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file torint.h
*
* \brief Integer definitions used throughout Tor.
**/
#ifndef TOR_TORINT_H
#define TOR_TORINT_H
#include "orconfig.h"
#include <stdint.h>
#include <stdbool.h>
#include <limits.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_LIMITS_H
#include <sys/limits.h>
#endif
#ifndef SIZE_MAX
#if SIZEOF_SIZE_T == 8
#define SIZE_MAX UINT64_MAX
#elif SIZEOF_SIZE_T == 4
#define SIZE_MAX UINT32_MAX
#else
#error "Can't define SIZE_MAX"
#endif /* SIZEOF_SIZE_T == 8 || ... */
#endif /* !defined(SIZE_MAX) */
#ifndef HAVE_SSIZE_T
#if SIZEOF_SIZE_T == 8
typedef int64_t ssize_t;
#elif SIZEOF_SIZE_T == 4
typedef int32_t ssize_t;
#else
#error "Can't define ssize_t."
#endif /* SIZEOF_SIZE_T == 8 || ... */
#endif /* !defined(HAVE_SSIZE_T) */
/* This assumes a sane (2's-complement) representation. But if you
* aren't 2's complement, and you don't define LONG_MAX, then you're so
* bizarre that I want nothing to do with you. */
#ifndef USING_TWOS_COMPLEMENT
#error "Your platform doesn't use 2's complement arithmetic."
#endif
#ifndef TIME_MAX
#if (SIZEOF_TIME_T == SIZEOF_INT)
#define TIME_MAX ((time_t)INT_MAX)
#elif (SIZEOF_TIME_T == SIZEOF_LONG)
#define TIME_MAX ((time_t)LONG_MAX)
#elif (SIZEOF_TIME_T == 8)
#define TIME_MAX ((time_t)INT64_MAX)
#else
#error "Can't define TIME_MAX"
#endif /* (SIZEOF_TIME_T == SIZEOF_INT) || ... */
#endif /* !defined(TIME_MAX) */
#ifndef TIME_MIN
#if (SIZEOF_TIME_T == SIZEOF_INT)
#define TIME_MIN ((time_t)INT_MIN)
#elif (SIZEOF_TIME_T == SIZEOF_LONG)
#define TIME_MIN ((time_t)LONG_MIN)
#elif (SIZEOF_TIME_T == 8)
#define TIME_MIN ((time_t)INT64_MIN)
#else
#error "Can't define TIME_MIN"
#endif /* (SIZEOF_TIME_T == SIZEOF_INT) || ... */
#endif /* !defined(TIME_MIN) */
#ifndef SIZE_MAX
#if (SIZEOF_SIZE_T == 4)
#define SIZE_MAX UINT32_MAX
#elif (SIZEOF_SIZE_T == 8)
#define SIZE_MAX UINT64_MAX
#else
#error "Can't define SIZE_MAX"
#endif /* (SIZEOF_SIZE_T == 4) || ... */
#endif /* !defined(SIZE_MAX) */
#ifdef _WIN32
# ifdef _WIN64
# define TOR_PRIuSZ PRIu64
# else
# define TOR_PRIuSZ PRIu32
# endif
#else /* !defined(_WIN32) */
# define TOR_PRIuSZ "zu"
#endif /* defined(_WIN32) */
#ifdef _WIN32
# ifdef _WIN64
# define TOR_PRIdSZ PRId64
# else
# define TOR_PRIdSZ PRId32
# endif
#else /* !defined(_WIN32) */
# define TOR_PRIdSZ "zd"
#endif /* defined(_WIN32) */
#ifndef SSIZE_MAX
#if (SIZEOF_SIZE_T == 4)
#define SSIZE_MAX INT32_MAX
#elif (SIZEOF_SIZE_T == 8)
#define SSIZE_MAX INT64_MAX
#else
#error "Can't define SSIZE_MAX"
#endif /* (SIZEOF_SIZE_T == 4) || ... */
#endif /* !defined(SSIZE_MAX) */
/** Any ssize_t larger than this amount is likely to be an underflow. */
#define SSIZE_T_CEILING ((ssize_t)(SSIZE_MAX-16))
/** Any size_t larger than this amount is likely to be an underflow. */
#define SIZE_T_CEILING ((size_t)(SSIZE_MAX-16))
#if SIZEOF_INT > SIZEOF_VOID_P
#error "sizeof(int) > sizeof(void *) - Can't build Tor here."
#endif
#if SIZEOF_UNSIGNED_INT > SIZEOF_VOID_P
#error "sizeof(unsigned int) > sizeof(void *) - Can't build Tor here."
#endif
#endif /* !defined(TOR_TORINT_H) */
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