1 /* 2 * Copyright (C) 2019 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * btstack_bool.h 40 * 41 * Provide bool type */ 42 43 #ifndef BTSTACK_BOOL_H 44 #define BTSTACK_BOOL_H 45 46 #if !defined(__cplusplus) 47 48 // 49 // Check for C99 50 // see: https://sourceforge.net/p/predef/wiki/Standards/ 51 // 52 #if defined(__STDC__) 53 # if defined(__STDC_VERSION__) 54 # if (__STDC_VERSION__ >= 199901L) 55 # define PREDEF_STANDARD_C_1999 56 # endif 57 # endif 58 #endif /* __STDC__ */ 59 60 // Detecting C99 in Visual Studio requires to disable Microsoft Extensions (/Za) which causes other issues 61 // Workaround: if MSC, assume stdbool.h exists, which is true for Visual Studio 2022 62 #ifdef _MSC_VER 63 #define PREDEF_STANDARD_C_1999 64 #endif 65 66 // define boolean type - required for MISRA-C 2012 Essential Type System 67 #ifdef PREDEF_STANDARD_C_1999 68 69 // use <stdbool.h> if C99 or higher 70 # include <stdbool.h> 71 72 #else /* PREDEF_STANDARD_C_1999 */ 73 74 // backport for pre-c99 compilers or incorrect detection 75 #ifndef bool 76 #define bool unsigned char 77 #endif 78 #ifndef false 79 #define false 0 80 #endif 81 #ifndef true 82 #define true 1 83 #endif 84 85 #endif /* PREDEF_STANDARD_C_1999 */ 86 87 #endif /* __cplusplus */ 88 89 #endif /* BTSTACK_BOOL_H */ 90