hphp/util/htonll.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #ifndef incl_HPHP_HTONLL_H_
  18 #define incl_HPHP_HTONLL_H_
  19
  20 /*
  21  * Tries to find a suitable implementation of htonll/ntohll if it doesn't
  22  * already exist. This could go into portability.h, but seemed specific enough
  23  * to be worth pulling out.
  24  */
  25
  26 #include <folly/portability/Sockets.h>
  27 #if defined(__FreeBSD__)
  28 # include <sys/endian.h>
  29 #elif defined(__APPLE__)
  30 # include <machine/endian.h>
  31 # include <libkern/OSByteOrder.h>
  32 #elif defined(_MSC_VER)
  33 # include <stdlib.h>
  34 #else
  35 # include <byteswap.h>
  36 #endif
  37
  38 #if __BYTE_ORDER == __LITTLE_ENDIAN
  39 # define htolell(x) (x)
  40 # define letohll(x) (x)
  41 # if !defined(htonll) && !defined(ntohll)
  42 #  if defined(__FreeBSD__)
  43 #   define htonll(x) bswap64(x)
  44 #   define ntohll(x) bswap64(x)
  45 #  elif defined(__APPLE__)
  46 #   define htonll(x) OSSwapInt64(x)
  47 #   define ntohll(x) OSSwapInt64(x)
  48 #  elif defined(_MSC_VER)
  49 #   define htonll(x) _byteswap_uint64(x)
  50 #   define ntohll(x) _byteswap_uint64(x)
  51 #  else
  52 #   define htonll(x) bswap_64(x)
  53 #   define ntohll(x) bswap_64(x)
  54 #  endif
  55 # endif
  56 #else
  57 # if defined(__FreeBSD__)
  58 #  define htolell(x) bswap64(x)
  59 #  define letohll(x) bswap64(x)
  60 # elif defined(__APPLE__)
  61 #  define htolell(x) OSSwapInt64(x)
  62 #  define letohll(x) OSSwapInt64(x)
  63 # elif defined(_MSC_VER)
  64 #  define htolell(x) _byteswap_uint64(x)
  65 #  define letohll(x) _byteswap_uint64(x)
  66 # else
  67 #  define htolell(x) bswap_64(x)
  68 #  define letohll(x) bswap_64(x)
  69 # endif
  70 # if !defined(htonll) && !defined(ntohll)
  71 #  define htonll(x) (x)
  72 #  define ntohll(x) (x)
  73 # endif
  74 #endif
  75
  76 #endif