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int.h
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int.h
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/*
* int - integer types and integer macros used in calc
*
* For general information on C integers, see:
*
* https://en.cppreference.com/w/c/language/arithmetic_types
* https://en.cppreference.com/w/c/types/integer
*
* Copyright (C) 2023 Landon Curt Noll
*
* Primary author: Landon Curt Noll
*
* Calc is open software; you can redistribute it and/or modify it under
* the terms of the version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* Calc is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* A copy of version 2.1 of the GNU Lesser General Public License is
* distributed with calc under the filename COPYING-LGPL. You should have
* received a copy with calc; if not, write to Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Under source code control: 2023/08/22 21:14:25
* File existed as early as: 2023
*
* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
*/
#if !defined(INCLUDE_INT_H)
#define INCLUDE_INT_H
/*
* important include files that have an impact in integer types used in calc
*/
#include "have_stdint.h"
#if defined(HAVE_STDINT_H)
#include <stdint.h>
#endif /* HAVE_STDINT_H */
#include "have_inttypes.h"
#if defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#endif /* HAVE_INTTYPES_H */
#include "status.chk_c.h"
#include "bool.h"
#include "charbit.h"
#include "version.h"
/*
* case: C compiler and select include files appear to meet calc requirements
*/
#if defined(CHK_C)
/*
* bit width of various signed integers
*
* These are standard for c23 or later.
* Compute them for earlier compiler standards.
*/
#if !defined(INT8_WIDTH)
#define INT8_WIDTH (sizeof(int8_t) * CALC_CHARBIT)
#endif /* INT8_WIDTH */
#if !defined(INT16_WIDTH)
#define INT16_WIDTH (sizeof(int16_t) * CALC_CHARBIT)
#endif /* INT16_WIDTH */
#if !defined(INT32_WIDTH)
#define INT32_WIDTH (sizeof(int32_t) * CALC_CHARBIT)
#endif /* INT32_WIDTH */
#if !defined(INT64_WIDTH)
#define INT64_WIDTH (sizeof(int64_t) * CALC_CHARBIT)
#endif /* INT64_WIDTH */
#if !defined(INTPTR_WIDTH)
#define INTPTR_WIDTH (sizeof(intptr_t) * CALC_CHARBIT)
#endif /* INTPTR_WIDTH */
#if !defined(INTMAX_WIDTH)
#define INTMAX_WIDTH (sizeof(intmax_t) * CALC_CHARBIT)
#endif /* INTMAX_WIDTH */
/*
* bit width of various unsigned integers
*
* These are standard for c23 or later.
* Compute them for earlier compiler standards.
*/
#if !defined(UINT8_WIDTH)
#define UINT8_WIDTH (sizeof(uint8_t) * CALC_CHARBIT)
#endif /* UINT8_WIDTH */
#if !defined(UINT16_WIDTH)
#define UINT16_WIDTH (sizeof(uint16_t) * CALC_CHARBIT)
#endif /* UINT16_WIDTH */
#if !defined(UINT32_WIDTH)
#define UINT32_WIDTH (sizeof(uint32_t) * CALC_CHARBIT)
#endif /* UINT32_WIDTH */
#if !defined(UINT64_WIDTH)
#define UINT64_WIDTH (sizeof(uint64_t) * CALC_CHARBIT)
#endif /* UINT64_WIDTH */
#if !defined(UINTPTR_WIDTH)
#define UINTPTR_WIDTH (sizeof(uintptr_t) * CALC_CHARBIT)
#endif /* UINTPTR_WIDTH */
#if !defined(UINTMAX_WIDTH)
#define UINTMAX_WIDTH (sizeof(uintmax_t) * CALC_CHARBIT)
#endif /* UINTMAX_WIDTH */
/*
* case: C compiler and/or select include files do not meet calc requirements
*/
#else /* CHK_C */
/*
* calc v2 is the last version where one might be able to use an old C compiler
* and/or tolerate missing include files
*/
#if MAJOR_VER < 3
/*
* bit width of various signed integers
*
* These are standard for c23 or later.
* Compute them for earlier compiler standards.
*/
#if !defined(INT8_WIDTH)
#define INT8_WIDTH (8)
#endif /* INT8_WIDTH */
#if !defined(INT16_WIDTH)
#define INT16_WIDTH (16)
#endif /* INT16_WIDTH */
#if !defined(INT32_WIDTH)
#define INT32_WIDTH (32)
#endif /* INT32_WIDTH */
#if !defined(INT64_WIDTH)
#define INT64_WIDTH (64)
#endif /* INT64_WIDTH */
#if !defined(INTPTR_WIDTH)
#define INTPTR_WIDTH (64)
#endif /* INTPTR_WIDTH */
#if !defined(INTMAX_WIDTH)
#define INTMAX_WIDTH (64)
#endif /* INTMAX_WIDTH */
/*
* bit width of various unsigned integers
*
* These are standard for c23 or later.
* Compute them for earlier compiler standards.
*/
#if !defined(UINT8_WIDTH)
#define UINT8_WIDTH (8)
#endif /* UINT8_WIDTH */
#if !defined(UINT16_WIDTH)
#define UINT16_WIDTH (16)
#endif /* UINT16_WIDTH */
#if !defined(UINT32_WIDTH)
#define UINT32_WIDTH (32)
#endif /* UINT32_WIDTH */
#if !defined(UINT64_WIDTH)
#define UINT64_WIDTH (64)
#endif /* UINT64_WIDTH */
#if !defined(UINTPTR_WIDTH)
#define UINTPTR_WIDTH (64)
#endif /* UINTPTR_WIDTH */
#if !defined(UINTMAX_WIDTH)
#define UINTMAX_WIDTH (64)
#endif /* UINTMAX_WIDTH */
#else /* MAJOR_VER < 3 */
/*
* calc v3 or later and CHK_C is undefined
*/
#pragma GCC error "calc v3 and later require C compiler and include files that support CHK_C"
#endif /* MAJOR_VER < 3 */
#endif /* CHK_C */
#endif /* !INCLUDE_INT_H */