1 /***************************************************************************//** 2 * @file 3 * @brief Implementation of endianness detection & operations. 4 ******************************************************************************* 5 * # License 6 * <b>Copyright 2019 Silicon Laboratories Inc. www.silabs.com</b> 7 ******************************************************************************* 8 * 9 * SPDX-License-Identifier: Zlib 10 * 11 * The licensor of this software is Silicon Laboratories Inc. 12 * 13 * This software is provided 'as-is', without any express or implied 14 * warranty. In no event will the authors be held liable for any damages 15 * arising from the use of this software. 16 * 17 * Permission is granted to anyone to use this software for any purpose, 18 * including commercial applications, and to alter it and redistribute it 19 * freely, subject to the following restrictions: 20 * 21 * 1. The origin of this software must not be misrepresented; you must not 22 * claim that you wrote the original software. If you use this software 23 * in a product, an acknowledgment in the product documentation would be 24 * appreciated but is not required. 25 * 2. Altered source versions must be plainly marked as such, and must not be 26 * misrepresented as being the original software. 27 * 3. This notice may not be removed or altered from any source distribution. 28 * 29 ******************************************************************************/ 30 31 #ifndef SL_ENDIANNESS_H 32 #define SL_ENDIANNESS_H 33 34 #if (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || (__little_endian__ == 1) || WIN32 || (__BYTE_ORDER == __LITTLE_ENDIAN) 35 36 #define SL_IS_LITTLE_ENDIAN 1 37 #define SL_IS_BIG_ENDIAN 0 38 #define BIGENDIAN_CPU false // Should not be used anymore; this is only for backward compatibility(Zigbee) 39 40 #elif (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || (__big_endian__ == 1) || (__BYTE_ORDER == __BIG_ENDIAN) 41 42 #define SL_IS_LITTLE_ENDIAN 0 43 #define SL_IS_BIG_ENDIAN 1 44 #define BIGENDIAN_CPU true // Should not be used anymore; this is only for backward compatibility(Zigbee) 45 46 #else 47 // Endianness must be provided by the user 48 #if (defined(CPU_LITTLE_ENDIAN)) 49 50 #define SL_IS_LITTLE_ENDIAN 1 51 #define SL_IS_BIG_ENDIAN 0 52 #define BIGENDIAN_CPU false // Should not be used anymore; this is only for backward compatibility(Zigbee) 53 54 #elif (defined(CPU_BIG_ENDIAN)) 55 56 #define SL_IS_LITTLE_ENDIAN 0 57 #define SL_IS_BIG_ENDIAN 1 58 #define BIGENDIAN_CPU true // Should not be used anymore; this is only for backward compatibility(Zigbee) 59 60 #else 61 #error Endianess not defined 62 #endif 63 #endif 64 65 #endif 66
