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 #include "wtf/CPU.h" 35 #include "wtf/Platform.h" 36 37 #if OS(UNIX) 38 #include <arpa/inet.h> 39 #endif 40 41 #if OS(WINDOWS) 42 43 namespace WTF { 44 inline uint32_t wswap32(uint32_t x) { return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16); } 45 inline uint32_t bswap32(uint32_t x) { return ((x & 0xff000000) >> 24) | ((x & 0x00ff0000) >> 8) | ((x & 0x0000ff00) << 8) | ((x & 0x000000ff) << 24); } 46 inline uint16_t bswap16(uint16_t x) { return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8); } 47 } // namespace WTF 48 49 #if CPU(BIG_ENDIAN) 50 inline uint16_t ntohs(uint16_t x) { return x; } 51 inline uint16_t htons(uint16_t x) { return x; } 52 inline uint32_t ntohl(uint32_t x) { return x; } 53 inline uint32_t htonl(uint32_t x) { return x; } 54 #elif CPU(MIDDLE_ENDIAN) 55 inline uint16_t ntohs(uint16_t x) { return x; } 56 inline uint16_t htons(uint16_t x) { return x; } 57 inline uint32_t ntohl(uint32_t x) { return WTF::wswap32(x); } 58 inline uint32_t htonl(uint32_t x) { return WTF::wswap32(x); } 59 #else 60 inline uint16_t ntohs(uint16_t x) { return WTF::bswap16(x); } 61 inline uint16_t htons(uint16_t x) { return WTF::bswap16(x); } 62 inline uint32_t ntohl(uint32_t x) { return WTF::bswap32(x); } 63 inline uint32_t htonl(uint32_t x) { return WTF::bswap32(x); } 64 #endif 65 66 #endif // OS(WINDOWS) 67 68 #endif // WTF_ByteOrder_h 69
