1 /* Copyright (C) 2014, Felix Morgner <felix.morgner@gmail.com> 2 Copyright (C) 2009-2014, Martin Johansson <martin@fatbob.nu> 3 Copyright (C) 2005-2014, Thorvald Natvig <thorvald@natvig.com> 4 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions 9 are met: 10 11 - Redistributions of source code must retain the above copyright notice, 12 this list of conditions and the following disclaimer. 13 - Redistributions in binary form must reproduce the above copyright notice, 14 this list of conditions and the following disclaimer in the documentation 15 and/or other materials provided with the distribution. 16 - Neither the name of the Developers nor the names of its contributors may 17 be used to endorse or promote products derived from this software without 18 specific prior written permission. 19 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 24 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef BYTEORDER_H_ 34 #define BYTEORDER_H_ 35 36 #include <stdint.h> 37 38 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) 39 #include <machine/endian.h> 40 #if BYTE_ORDER == BIG_ENDIAN 41 #define BYTE_ORDER_BIG_ENDIAN 42 #endif // BYTE_ORDER == BIG_ENDIAN 43 #elif defined(LINUX) 44 #include <endian.h> 45 #if __BYTE_ORDER == __BIG_ENDIAN 46 #define BYTE_ORDER_BIG_ENDIAN 47 #endif // __BYTE_ORDER == __BIG_ENDIAN 48 #endif // defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) 49 50 #if defined(__LP64__) 51 #define BLOCKSIZE 2 52 #define SHIFTBITS 63 53 typedef uint64_t subblock; 54 #if defined(BYTE_ORDER_BIG_ENDIAN) 55 #define SWAPPED(x) (x) 56 #elif defined( __x86_64__) 57 #define SWAPPED(x) ({register uint64_t __out, __in = (x); __asm__("bswap %q0" : "=r"(__out) : "0"(__in)); __out;}) 58 #else 59 #if defined(__linux__) 60 #include <byteswap.h> 61 #elif defined(__FreeBSD__) 62 #include <sys/endian.h> 63 #endif // defined(__linux__) 64 #define SWAPPED(x) bswap64(x) 65 #endif // defined(BYTE_ORDER_BIG_ENDIAN) 66 #else 67 #define BLOCKSIZE 4 68 #define SHIFTBITS 31 69 typedef uint32_t subblock; 70 #define SWAPPED(x) htonl(x) 71 #endif // defined(__LP64__) 72 73 #define HIGHBIT (1<<SHIFTBITS); 74 75 #endif // BYTEORDER_H_ 76