int.h

/*
 * 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 */