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Copy pathinteger.h
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653 lines (605 loc) · 21.6 KB
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/*
* @file integer.h
* @brief Fixed-width integer types for C (portable across platforms).
* @author ByteBard
* @copyright MIT
*
* This header provides fixed-width integer types (e.g., int32_t, uint64_t)
* for C89, C99, and MSVC environments.
*
* For pre-C99 compilers, run get_sizeof_data_type.c first to generate
* _sizeof_data_type.h with platform-specific size definitions.
*
* Design goals:
* - Prefer the native implementation when <stdint.h> is available.
* - Provide a practical C89/MSVC fallback for exact-width integer types.
* - Define min/max macros for the integer types that are actually available.
* - Define intmax_t / uintmax_t.
* - Define intptr_t / uintptr_t only when a suitable integer type exists.
* - Define SIZE_MAX if it is missing.
*
* Notes:
* - Exact-width types are only defined if the implementation actually
* provides a matching width.
* - On unusual architectures, some exact-width types may be unavailable.
*/
#ifndef INTEGER_H
#define INTEGER_H
#include <limits.h>
#include <stddef.h>
/* ------------------------------------------------------------------------- */
/* Native C99+ path */
/* ------------------------------------------------------------------------- */
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
#include <stdint.h>
#ifdef INT8_MAX
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#endif
#ifdef INT16_MAX
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#endif
#ifdef INT32_MAX
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#endif
#ifdef INT64_MAX
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#endif
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
/* ------------------------------------------------------------------------- */
/* Microsoft Visual C++ path */
/* ------------------------------------------------------------------------- */
#elif defined(_MSC_VER)
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef signed __int64 int64_t;
typedef unsigned __int64 uint64_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#ifndef INT8_MIN
#define INT8_MIN SCHAR_MIN
#endif
#ifndef INT8_MAX
#define INT8_MAX SCHAR_MAX
#endif
#ifndef UINT8_MAX
#define UINT8_MAX UCHAR_MAX
#endif
#ifndef INT16_MIN
#define INT16_MIN SHRT_MIN
#endif
#ifndef INT16_MAX
#define INT16_MAX SHRT_MAX
#endif
#ifndef UINT16_MAX
#define UINT16_MAX USHRT_MAX
#endif
#ifndef INT32_MIN
#define INT32_MIN INT_MIN
#endif
#ifndef INT32_MAX
#define INT32_MAX INT_MAX
#endif
#ifndef UINT32_MAX
#define UINT32_MAX UINT_MAX
#endif
#ifndef INT64_MIN
#define INT64_MIN (-9223372036854775807i64 - 1)
#endif
#ifndef INT64_MAX
#define INT64_MAX 9223372036854775807i64
#endif
#ifndef UINT64_MAX
#define UINT64_MAX 18446744073709551615ui64
#endif
typedef int64_t intmax_t;
typedef uint64_t uintmax_t;
#ifndef INTMAX_MIN
#define INTMAX_MIN INT64_MIN
#endif
#ifndef INTMAX_MAX
#define INTMAX_MAX INT64_MAX
#endif
#ifndef UINTMAX_MAX
#define UINTMAX_MAX UINT64_MAX
#endif
#if defined(_WIN64)
typedef signed __int64 intptr_t;
typedef unsigned __int64 uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT64_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT64_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT64_MAX
#endif
#else
typedef signed int intptr_t;
typedef unsigned int uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT32_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT32_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT32_MAX
#endif
#endif
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
/* ------------------------------------------------------------------------- */
/* Fallback C89 path */
/* ------------------------------------------------------------------------- */
#else
#include "_sizeof_data_type.h"
/* --------------------------------------------------------------------- */
/* Exact-width integer typedef discovery */
/* --------------------------------------------------------------------- */
/* Use char */
#if _SIZEOF_CHAR == 8
typedef signed char int8_t;
typedef unsigned char uint8_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INTEGER_INT8_BASE_SCHAR
#define INTEGER_UINT8_BASE_UCHAR
#elif _SIZEOF_CHAR == 16
typedef signed char int16_t;
typedef unsigned char uint16_t;
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INTEGER_INT16_BASE_SCHAR
#define INTEGER_UINT16_BASE_UCHAR
#elif _SIZEOF_CHAR == 32
typedef signed char int32_t;
typedef unsigned char uint32_t;
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INTEGER_INT32_BASE_SCHAR
#define INTEGER_UINT32_BASE_UCHAR
#elif _SIZEOF_CHAR == 64
typedef signed char int64_t;
typedef unsigned char uint64_t;
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#define INTEGER_INT64_BASE_SCHAR
#define INTEGER_UINT64_BASE_UCHAR
#endif
/* Use short */
#if _SIZEOF_SHORT == 8
#ifndef INT8_IS_DEFINED
typedef signed short int8_t;
typedef unsigned short uint8_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INTEGER_INT8_BASE_SHORT
#define INTEGER_UINT8_BASE_USHORT
#endif
#elif _SIZEOF_SHORT == 16
#ifndef INT16_IS_DEFINED
typedef signed short int16_t;
typedef unsigned short uint16_t;
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INTEGER_INT16_BASE_SHORT
#define INTEGER_UINT16_BASE_USHORT
#endif
#elif _SIZEOF_SHORT == 32
#ifndef INT32_IS_DEFINED
typedef signed short int32_t;
typedef unsigned short uint32_t;
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INTEGER_INT32_BASE_SHORT
#define INTEGER_UINT32_BASE_USHORT
#endif
#elif _SIZEOF_SHORT == 64
#ifndef INT64_IS_DEFINED
typedef signed short int64_t;
typedef unsigned short uint64_t;
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#define INTEGER_INT64_BASE_SHORT
#define INTEGER_UINT64_BASE_USHORT
#endif
#endif
/* Use int */
#if _SIZEOF_INT == 8
#ifndef INT8_IS_DEFINED
typedef signed int int8_t;
typedef unsigned int uint8_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INTEGER_INT8_BASE_INT
#define INTEGER_UINT8_BASE_UINT
#endif
#elif _SIZEOF_INT == 16
#ifndef INT16_IS_DEFINED
typedef signed int int16_t;
typedef unsigned int uint16_t;
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INTEGER_INT16_BASE_INT
#define INTEGER_UINT16_BASE_UINT
#endif
#elif _SIZEOF_INT == 32
#ifndef INT32_IS_DEFINED
typedef signed int int32_t;
typedef unsigned int uint32_t;
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INTEGER_INT32_BASE_INT
#define INTEGER_UINT32_BASE_UINT
#endif
#elif _SIZEOF_INT == 64
#ifndef INT64_IS_DEFINED
typedef signed int int64_t;
typedef unsigned int uint64_t;
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#define INTEGER_INT64_BASE_INT
#define INTEGER_UINT64_BASE_UINT
#endif
#endif
/* Use long */
#if _SIZEOF_LONG == 8
#ifndef INT8_IS_DEFINED
typedef signed long int8_t;
typedef unsigned long uint8_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INTEGER_INT8_BASE_LONG
#define INTEGER_UINT8_BASE_ULONG
#endif
#elif _SIZEOF_LONG == 16
#ifndef INT16_IS_DEFINED
typedef signed long int16_t;
typedef unsigned long uint16_t;
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INTEGER_INT16_BASE_LONG
#define INTEGER_UINT16_BASE_ULONG
#endif
#elif _SIZEOF_LONG == 32
#ifndef INT32_IS_DEFINED
typedef signed long int32_t;
typedef unsigned long uint32_t;
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INTEGER_INT32_BASE_LONG
#define INTEGER_UINT32_BASE_ULONG
#endif
#elif _SIZEOF_LONG == 64
#ifndef INT64_IS_DEFINED
typedef signed long int64_t;
typedef unsigned long uint64_t;
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#define INTEGER_INT64_BASE_LONG
#define INTEGER_UINT64_BASE_ULONG
#endif
#endif
/* Use long long if supported */
#if defined(__GNUC__) || defined(__clang__)
#ifdef _SIZEOF_LONG_LONG
#if _SIZEOF_LONG_LONG == 8
#ifndef INT8_IS_DEFINED
typedef signed long long int8_t;
typedef unsigned long long uint8_t;
#define INT8_IS_DEFINED
#define UINT8_IS_DEFINED
#define INTEGER_INT8_BASE_LLONG
#define INTEGER_UINT8_BASE_ULLONG
#endif
#elif _SIZEOF_LONG_LONG == 16
#ifndef INT16_IS_DEFINED
typedef signed long long int16_t;
typedef unsigned long long uint16_t;
#define INT16_IS_DEFINED
#define UINT16_IS_DEFINED
#define INTEGER_INT16_BASE_LLONG
#define INTEGER_UINT16_BASE_ULLONG
#endif
#elif _SIZEOF_LONG_LONG == 32
#ifndef INT32_IS_DEFINED
typedef signed long long int32_t;
typedef unsigned long long uint32_t;
#define INT32_IS_DEFINED
#define UINT32_IS_DEFINED
#define INTEGER_INT32_BASE_LLONG
#define INTEGER_UINT32_BASE_ULLONG
#endif
#elif _SIZEOF_LONG_LONG == 64
#ifndef INT64_IS_DEFINED
typedef signed long long int64_t;
typedef unsigned long long uint64_t;
#define INT64_IS_DEFINED
#define UINT64_IS_DEFINED
#define INTEGER_INT64_BASE_LLONG
#define INTEGER_UINT64_BASE_ULLONG
#endif
#endif
#endif
#endif
/* --------------------------------------------------------------------- */
/* Exact-width limits */
/* --------------------------------------------------------------------- */
#ifdef INT8_IS_DEFINED
#ifndef INT8_MIN
#if defined(INTEGER_INT8_BASE_SCHAR)
#define INT8_MIN SCHAR_MIN
#define INT8_MAX SCHAR_MAX
#elif defined(INTEGER_INT8_BASE_SHORT)
#define INT8_MIN SHRT_MIN
#define INT8_MAX SHRT_MAX
#elif defined(INTEGER_INT8_BASE_INT)
#define INT8_MIN INT_MIN
#define INT8_MAX INT_MAX
#elif defined(INTEGER_INT8_BASE_LONG)
#define INT8_MIN LONG_MIN
#define INT8_MAX LONG_MAX
#elif defined(INTEGER_INT8_BASE_LLONG)
#define INT8_MIN (-127LL - 1LL)
#define INT8_MAX 127LL
#endif
#endif
#endif
#ifdef UINT8_IS_DEFINED
#ifndef UINT8_MAX
#if defined(INTEGER_UINT8_BASE_UCHAR)
#define UINT8_MAX UCHAR_MAX
#elif defined(INTEGER_UINT8_BASE_USHORT)
#define UINT8_MAX USHRT_MAX
#elif defined(INTEGER_UINT8_BASE_UINT)
#define UINT8_MAX UINT_MAX
#elif defined(INTEGER_UINT8_BASE_ULONG)
#define UINT8_MAX ULONG_MAX
#elif defined(INTEGER_UINT8_BASE_ULLONG)
#define UINT8_MAX 255ULL
#endif
#endif
#endif
#ifdef INT16_IS_DEFINED
#ifndef INT16_MIN
#if defined(INTEGER_INT16_BASE_SCHAR)
#define INT16_MIN SCHAR_MIN
#define INT16_MAX SCHAR_MAX
#elif defined(INTEGER_INT16_BASE_SHORT)
#define INT16_MIN SHRT_MIN
#define INT16_MAX SHRT_MAX
#elif defined(INTEGER_INT16_BASE_INT)
#define INT16_MIN INT_MIN
#define INT16_MAX INT_MAX
#elif defined(INTEGER_INT16_BASE_LONG)
#define INT16_MIN LONG_MIN
#define INT16_MAX LONG_MAX
#elif defined(INTEGER_INT16_BASE_LLONG)
#define INT16_MIN (-32767LL - 1LL)
#define INT16_MAX 32767LL
#endif
#endif
#endif
#ifdef UINT16_IS_DEFINED
#ifndef UINT16_MAX
#if defined(INTEGER_UINT16_BASE_UCHAR)
#define UINT16_MAX UCHAR_MAX
#elif defined(INTEGER_UINT16_BASE_USHORT)
#define UINT16_MAX USHRT_MAX
#elif defined(INTEGER_UINT16_BASE_UINT)
#define UINT16_MAX UINT_MAX
#elif defined(INTEGER_UINT16_BASE_ULONG)
#define UINT16_MAX ULONG_MAX
#elif defined(INTEGER_UINT16_BASE_ULLONG)
#define UINT16_MAX 65535ULL
#endif
#endif
#endif
#ifdef INT32_IS_DEFINED
#ifndef INT32_MIN
#if defined(INTEGER_INT32_BASE_SCHAR)
#define INT32_MIN SCHAR_MIN
#define INT32_MAX SCHAR_MAX
#elif defined(INTEGER_INT32_BASE_SHORT)
#define INT32_MIN SHRT_MIN
#define INT32_MAX SHRT_MAX
#elif defined(INTEGER_INT32_BASE_INT)
#define INT32_MIN INT_MIN
#define INT32_MAX INT_MAX
#elif defined(INTEGER_INT32_BASE_LONG)
#define INT32_MIN LONG_MIN
#define INT32_MAX LONG_MAX
#elif defined(INTEGER_INT32_BASE_LLONG)
#define INT32_MIN (-2147483647LL - 1LL)
#define INT32_MAX 2147483647LL
#endif
#endif
#endif
#ifdef UINT32_IS_DEFINED
#ifndef UINT32_MAX
#if defined(INTEGER_UINT32_BASE_UCHAR)
#define UINT32_MAX UCHAR_MAX
#elif defined(INTEGER_UINT32_BASE_USHORT)
#define UINT32_MAX USHRT_MAX
#elif defined(INTEGER_UINT32_BASE_UINT)
#define UINT32_MAX UINT_MAX
#elif defined(INTEGER_UINT32_BASE_ULONG)
#define UINT32_MAX ULONG_MAX
#elif defined(INTEGER_UINT32_BASE_ULLONG)
#define UINT32_MAX 4294967295ULL
#endif
#endif
#endif
#ifdef INT64_IS_DEFINED
#ifndef INT64_MIN
#if defined(INTEGER_INT64_BASE_SCHAR)
#define INT64_MIN SCHAR_MIN
#define INT64_MAX SCHAR_MAX
#elif defined(INTEGER_INT64_BASE_SHORT)
#define INT64_MIN SHRT_MIN
#define INT64_MAX SHRT_MAX
#elif defined(INTEGER_INT64_BASE_INT)
#define INT64_MIN INT_MIN
#define INT64_MAX INT_MAX
#elif defined(INTEGER_INT64_BASE_LONG)
#define INT64_MIN LONG_MIN
#define INT64_MAX LONG_MAX
#elif defined(INTEGER_INT64_BASE_LLONG)
#define INT64_MIN (-9223372036854775807LL - 1LL)
#define INT64_MAX 9223372036854775807LL
#endif
#endif
#endif
#ifdef UINT64_IS_DEFINED
#ifndef UINT64_MAX
#if defined(INTEGER_UINT64_BASE_UCHAR)
#define UINT64_MAX UCHAR_MAX
#elif defined(INTEGER_UINT64_BASE_USHORT)
#define UINT64_MAX USHRT_MAX
#elif defined(INTEGER_UINT64_BASE_UINT)
#define UINT64_MAX UINT_MAX
#elif defined(INTEGER_UINT64_BASE_ULONG)
#define UINT64_MAX ULONG_MAX
#elif defined(INTEGER_UINT64_BASE_ULLONG)
#define UINT64_MAX 18446744073709551615ULL
#endif
#endif
#endif
/* --------------------------------------------------------------------- */
/* intmax_t / uintmax_t */
/* --------------------------------------------------------------------- */
#ifdef INT64_IS_DEFINED
typedef int64_t intmax_t;
typedef uint64_t uintmax_t;
#ifndef INTMAX_MIN
#define INTMAX_MIN INT64_MIN
#endif
#ifndef INTMAX_MAX
#define INTMAX_MAX INT64_MAX
#endif
#ifndef UINTMAX_MAX
#define UINTMAX_MAX UINT64_MAX
#endif
#elif defined(INT32_IS_DEFINED)
typedef int32_t intmax_t;
typedef uint32_t uintmax_t;
#ifndef INTMAX_MIN
#define INTMAX_MIN INT32_MIN
#endif
#ifndef INTMAX_MAX
#define INTMAX_MAX INT32_MAX
#endif
#ifndef UINTMAX_MAX
#define UINTMAX_MAX UINT32_MAX
#endif
#elif defined(INT16_IS_DEFINED)
typedef int16_t intmax_t;
typedef uint16_t uintmax_t;
#ifndef INTMAX_MIN
#define INTMAX_MIN INT16_MIN
#endif
#ifndef INTMAX_MAX
#define INTMAX_MAX INT16_MAX
#endif
#ifndef UINTMAX_MAX
#define UINTMAX_MAX UINT16_MAX
#endif
#elif defined(INT8_IS_DEFINED)
typedef int8_t intmax_t;
typedef uint8_t uintmax_t;
#ifndef INTMAX_MIN
#define INTMAX_MIN INT8_MIN
#endif
#ifndef INTMAX_MAX
#define INTMAX_MAX INT8_MAX
#endif
#ifndef UINTMAX_MAX
#define UINTMAX_MAX UINT8_MAX
#endif
#endif
/* --------------------------------------------------------------------- */
/* intptr_t / uintptr_t */
/* --------------------------------------------------------------------- */
#if _SIZEOF_VOID_P == 8
#ifdef INT8_IS_DEFINED
typedef int8_t intptr_t;
typedef uint8_t uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT8_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT8_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT8_MAX
#endif
#endif
#elif _SIZEOF_VOID_P == 16
#ifdef INT16_IS_DEFINED
typedef int16_t intptr_t;
typedef uint16_t uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT16_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT16_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT16_MAX
#endif
#endif
#elif _SIZEOF_VOID_P == 32
#ifdef INT32_IS_DEFINED
typedef int32_t intptr_t;
typedef uint32_t uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT32_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT32_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT32_MAX
#endif
#endif
#elif _SIZEOF_VOID_P == 64
#ifdef INT64_IS_DEFINED
typedef int64_t intptr_t;
typedef uint64_t uintptr_t;
#ifndef INTPTR_MIN
#define INTPTR_MIN INT64_MIN
#endif
#ifndef INTPTR_MAX
#define INTPTR_MAX INT64_MAX
#endif
#ifndef UINTPTR_MAX
#define UINTPTR_MAX UINT64_MAX
#endif
#endif
#endif
/* --------------------------------------------------------------------- */
/* size_t-related */
/* --------------------------------------------------------------------- */
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
#endif /* platform selection */
#endif /* INTEGER_H */