1/* 2* Copyright (C) 2012 Google Inc. All rights reserved. 3* 4* Redistribution and use in source and binary forms, with or without 5* modification, are permitted provided that the following conditions are 6* met: 7* 8* * Redistributions of source code must retain the above copyright 9* notice, this list of conditions and the following disclaimer. 10* * Redistributions in binary form must reproduce the above 11* copyright notice, this list of conditions and the following disclaimer 12* in the documentation and/or other materials provided with the 13* distribution. 14* * Neither the name of Google Inc. nor the names of its 15* contributors may be used to endorse or promote products derived from 16* this software without specific prior written permission. 17* 18* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29*/ 30 31#ifndef WTF_ByteOrder_h 32#define WTF_ByteOrder_h 33 34#if OS(UNIX) 35#include <arpa/inet.h> 36#endif 37 38#if OS(WINDOWS) 39 40namespace WTF { 41inline uint32_t wswap32(uint32_t x) { return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16); } 42inline uint32_t bswap32(uint32_t x) { return ((x & 0xff000000) >> 24) | ((x & 0x00ff0000) >> 8) | ((x & 0x0000ff00) << 8) | ((x & 0x000000ff) << 24); } 43inline uint16_t bswap16(uint16_t x) { return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8); } 44} // namespace WTF 45 46#if CPU(BIG_ENDIAN) 47inline uint16_t ntohs(uint16_t x) { return x; } 48inline uint16_t htons(uint16_t x) { return x; } 49inline uint32_t ntohl(uint32_t x) { return x; } 50inline uint32_t htonl(uint32_t x) { return x; } 51#elif CPU(MIDDLE_ENDIAN) 52inline uint16_t ntohs(uint16_t x) { return x; } 53inline uint16_t htons(uint16_t x) { return x; } 54inline uint32_t ntohl(uint32_t x) { return WTF::wswap32(x); } 55inline uint32_t htonl(uint32_t x) { return WTF::wswap32(x); } 56#else 57inline uint16_t ntohs(uint16_t x) { return WTF::bswap16(x); } 58inline uint16_t htons(uint16_t x) { return WTF::bswap16(x); } 59inline uint32_t ntohl(uint32_t x) { return WTF::bswap32(x); } 60inline uint32_t htonl(uint32_t x) { return WTF::bswap32(x); } 61#endif 62 63#endif // OS(WINDOWS) 64 65#endif // WTF_ByteOrder_h 66