byteorder.h (2545B)
1 /* <MIT License> 2 Copyright (c) 2013-2014 Marek Majkowski <marek@popcount.org> 3 4 Permission is hereby granted, free of charge, to any person obtaining a copy 5 of this software and associated documentation files (the "Software"), to deal 6 in the Software without restriction, including without limitation the rights 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 copies of the Software, and to permit persons to whom the Software is 9 furnished to do so, subject to the following conditions: 10 11 The above copyright notice and this permission notice shall be included in 12 all copies or substantial portions of the Software. 13 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 THE SOFTWARE. 21 </MIT License> 22 23 Original location: 24 https://github.com/majek/csiphash/ 25 26 Solution inspired by code from: 27 Samuel Neves (supercop/crypto_auth/siphash24/little) 28 djb (supercop/crypto_auth/siphash24/little2) 29 Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c) 30 */ 31 32 #ifdef HAVE_SYS_PARAM_H 33 #include <sys/param.h> 34 #endif 35 36 /* This code is extracted from csiphash.h */ 37 38 #if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \ 39 __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 40 # define _le64toh(x) ((uint64_t)(x)) 41 #elif defined(_WIN32) 42 /* Windows is always little endian, unless you're on xbox360 43 http://msdn.microsoft.com/en-us/library/b0084kay(v=vs.80).aspx */ 44 # define _le64toh(x) ((uint64_t)(x)) 45 #elif defined(__APPLE__) 46 # include <libkern/OSByteOrder.h> 47 # define _le64toh(x) OSSwapLittleToHostInt64(x) 48 #elif defined(sun) || defined(__sun) 49 # include <sys/byteorder.h> 50 # define _le64toh(x) LE_64(x) 51 52 #else 53 54 /* See: http://sourceforge.net/p/predef/wiki/Endianness/ */ 55 # if defined(__FreeBSD__) || defined(__NetBSD__) || defined(OpenBSD) 56 # include <sys/endian.h> 57 # else 58 # include <endian.h> 59 # endif 60 # if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \ 61 __BYTE_ORDER == __LITTLE_ENDIAN 62 # define _le64toh(x) ((uint64_t)(x)) 63 # else 64 # if defined(OpenBSD) 65 # define _le64toh(x) letoh64(x) 66 # else 67 # define _le64toh(x) le64toh(x) 68 # endif 69 # endif 70 71 #endif