third_party/WebKit/Source/wtf/ByteOrder.h

   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(POSIX)
  35 #include <arpa/inet.h>
  36 #endif
  37
  38 #if OS(WIN)
  39
  40 #include "wtf/ByteSwap.h"
  41 #include "wtf/CPU.h"
  42
  43 #if CPU(BIG_ENDIAN)
  44 inline uint16_t ntohs(uint16_t x) { return x; }
  45 inline uint16_t htons(uint16_t x) { return x; }
  46 inline uint32_t ntohl(uint32_t x) { return x; }
  47 inline uint32_t htonl(uint32_t x) { return x; }
  48 #elif CPU(MIDDLE_ENDIAN)
  49 inline uint16_t ntohs(uint16_t x) { return x; }
  50 inline uint16_t htons(uint16_t x) { return x; }
  51 inline uint32_t ntohl(uint32_t x) { return WTF::wswap32(x); }
  52 inline uint32_t htonl(uint32_t x) { return WTF::wswap32(x); }
  53 #else
  54 inline uint16_t ntohs(uint16_t x) { return WTF::bswap16(x); }
  55 inline uint16_t htons(uint16_t x) { return WTF::bswap16(x); }
  56 inline uint32_t ntohl(uint32_t x) { return WTF::bswap32(x); }
  57 inline uint32_t htonl(uint32_t x) { return WTF::bswap32(x); }
  58 #endif
  59
  60 #endif // OS(WIN)
  61
  62 #endif // WTF_ByteOrder_h