mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
3c18e6e25b
Fix "Under source code control" date for new version.h file. Sorted the order of symbols printed by "make env". Test if <stdbool.h> exists and set HAVE_STDBOOL_H accordingly in have_stdbool.h. Added HAVE_STDBOOL_H to allow one to force this value. Added "bool.h" include file to support use of boolean symbols, true and false for pre-c99 C compilers. The "bool.h" include file defines TRUE as true, FALSE as false, and BOOL as bool: for backward compatibility. The sign in a ZVALUE is now of type SIGN, whcih is either SB32 when CALC2_COMPAT is defined, or a bool. Replaced in C source, TRUE with true, FALSE with false, and BOOL with bool.
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
|
|
* bool - calc standard truth :-)
|
|
*
|
|
* Copyright (C) 2023 David I. Bell and Landon Curt Noll
|
|
*
|
|
* Primary author: David I. Bell
|
|
*
|
|
* 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: 2023/07/19 17:58:42
|
|
* File existed as early as: 1990
|
|
*
|
|
* chongo <was here> /\oo/\ http://www.isthe.com/chongo/
|
|
* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|
|
*/
|
|
|
|
|
|
#if !defined(INCLUDE_BOOL_H)
|
|
#define INCLUDE_BOOL_H
|
|
|
|
|
|
#if defined(HAVE_STDBOOL_H)
|
|
#include <stdbool.h>
|
|
#endif /* HAVE_STDBOOL_H */
|
|
|
|
|
|
/*
|
|
* standard truth :-)
|
|
*/
|
|
#if !defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
|
|
|
|
/* have a C99 compiler - we should have <stdbool.h>, true, false */
|
|
|
|
#elif !defined(__cplusplus)
|
|
|
|
/* do not have a C99 compiler - fake a <stdbool.h> header file */
|
|
typedef unsigned char bool;
|
|
#undef true
|
|
#define true ((bool)(1))
|
|
#undef false
|
|
#define false ((bool)(0))
|
|
|
|
#endif /* standard truth :-) */
|
|
|
|
|
|
/*
|
|
* calc historic booleans
|
|
*/
|
|
#undef TRUE
|
|
#define TRUE ((bool) true)
|
|
#undef FALSE
|
|
#define FALSE ((bool) false)
|
|
#undef BOOL
|
|
#define BOOL bool
|
|
|
|
|
|
/*
|
|
* booltostr - convert a boolean to a string
|
|
*/
|
|
#if !defined(booltostr)
|
|
#define booltostr(x) ((x) ? "true" : "false")
|
|
#endif
|
|
|
|
|
|
/*
|
|
* strtobool - convert a string to a boolean
|
|
*/
|
|
#if !defined(strtobool)
|
|
#define strtobool(x) ((bool) ((x) != NULL && !strcmp((x), "true")))
|
|
#endif
|
|
|
|
|
|
#endif /* !INCLUDE_BOOL_H*/
|