btstack/src/btstack_bool.h

78 lines
2.5 KiB
C

/*
* Copyright (C) 2019 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
/*
* btstack_bool.h
*
* Provide bool type */
#ifndef BTSTACK_BOOL_H
#define BTSTACK_BOOL_H
#if !defined(__cplusplus)
//
// Check for C99
// see: https://sourceforge.net/p/predef/wiki/Standards/
//
#if defined(__STDC__)
# if defined(__STDC_VERSION__)
# if (__STDC_VERSION__ >= 199901L)
# define PREDEF_STANDARD_C_1999
# endif
# endif
#endif /* __STDC__ */
// define boolean type - required for MISRA-C 2012 Essential Type System
#ifdef PREDEF_STANDARD_C_1999
// use <stdbool.h> if C99 or higher
# include <stdbool.h>
#else /* PREDEF_STANDARD_C_1999 */
// backport for pre-c99 compilers
#define bool unsigned char
#define false 0
#define true 1
#endif /* PREDEF_STANDARD_C_1999 */
#endif /* __cplusplus */
#endif /* BTSTACK_BOOL_H */