1 // Copyright (c) 2014-2019 The Bitcoin Core developers 2 // Distributed under the MIT software license, see the accompanying 3 // file COPYING or http://www.opensource.org/licenses/mit-license.php. 4 5 #ifndef BITCOIN_COMPAT_BYTESWAP_H 6 #define BITCOIN_COMPAT_BYTESWAP_H 7 8 #if defined(HAVE_CONFIG_H) 9 #include <config/bitcoin-config.h> 10 #endif 11 12 #include <stdint.h> 13 14 #if defined(HAVE_BYTESWAP_H) 15 #include <byteswap.h> 16 #endif 17 18 #if defined(MAC_OSX) 19 20 #include <libkern/OSByteOrder.h> 21 #define bswap_16(x) OSSwapInt16(x) 22 #define bswap_32(x) OSSwapInt32(x) 23 #define bswap_64(x) OSSwapInt64(x) 24 25 #else 26 // Non-MacOS / non-Darwin 27 28 #if HAVE_DECL_BSWAP_16 == 0 bswap_16(uint16_t x)29inline uint16_t bswap_16(uint16_t x) 30 { 31 return (x >> 8) | (x << 8); 32 } 33 #endif // HAVE_DECL_BSWAP16 == 0 34 35 #if HAVE_DECL_BSWAP_32 == 0 bswap_32(uint32_t x)36inline uint32_t bswap_32(uint32_t x) 37 { 38 return (((x & 0xff000000U) >> 24) | ((x & 0x00ff0000U) >> 8) | 39 ((x & 0x0000ff00U) << 8) | ((x & 0x000000ffU) << 24)); 40 } 41 #endif // HAVE_DECL_BSWAP32 == 0 42 43 #if HAVE_DECL_BSWAP_64 == 0 bswap_64(uint64_t x)44inline uint64_t bswap_64(uint64_t x) 45 { 46 return (((x & 0xff00000000000000ull) >> 56) 47 | ((x & 0x00ff000000000000ull) >> 40) 48 | ((x & 0x0000ff0000000000ull) >> 24) 49 | ((x & 0x000000ff00000000ull) >> 8) 50 | ((x & 0x00000000ff000000ull) << 8) 51 | ((x & 0x0000000000ff0000ull) << 24) 52 | ((x & 0x000000000000ff00ull) << 40) 53 | ((x & 0x00000000000000ffull) << 56)); 54 } 55 #endif // HAVE_DECL_BSWAP64 == 0 56 57 #endif // defined(MAC_OSX) 58 59 #endif // BITCOIN_COMPAT_BYTESWAP_H 60