ceph/src/Beast/include/beast/websocket/detail/endian.hpp

   1 //
   2 // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7
   8 #ifndef BEAST_WEBSOCKET_DETAIL_ENDIAN_HPP
   9 #define BEAST_WEBSOCKET_DETAIL_ENDIAN_HPP
  10
  11 #include <cstdint>
  12
  13 namespace beast {
  14 namespace websocket {
  15 namespace detail {
  16
  17 inline
  18 std::uint16_t
  19 big_uint16_to_native(void const* buf)
  20 {
  21     auto const p = reinterpret_cast<
  22         std::uint8_t const*>(buf);
  23     return (p[0]<<8) + p[1];
  24 }
  25
  26 inline
  27 std::uint64_t
  28 big_uint64_to_native(void const* buf)
  29 {
  30     auto const p = reinterpret_cast<
  31         std::uint8_t const*>(buf);
  32     return
  33         (static_cast<std::uint64_t>(p[0])<<56) +
  34         (static_cast<std::uint64_t>(p[1])<<48) +
  35         (static_cast<std::uint64_t>(p[2])<<40) +
  36         (static_cast<std::uint64_t>(p[3])<<32) +
  37         (static_cast<std::uint64_t>(p[4])<<24) +
  38         (static_cast<std::uint64_t>(p[5])<<16) +
  39         (static_cast<std::uint64_t>(p[6])<< 8) +
  40                                     p[7];
  41 }
  42
  43 inline
  44 std::uint32_t
  45 little_uint32_to_native(void const* buf)
  46 {
  47     auto const p = reinterpret_cast<
  48         std::uint8_t const*>(buf);
  49     return
  50                                     p[0] +
  51         (static_cast<std::uint32_t>(p[1])<< 8) +
  52         (static_cast<std::uint32_t>(p[2])<<16) +
  53         (static_cast<std::uint32_t>(p[3])<<24);
  54 }
  55
  56 inline
  57 void
  58 native_to_little_uint32(std::uint32_t v, void* buf)
  59 {
  60     auto p = reinterpret_cast<std::uint8_t*>(buf);
  61     p[0] =  v        & 0xff;
  62     p[1] = (v >>  8) & 0xff;
  63     p[2] = (v >> 16) & 0xff;
  64     p[3] = (v >> 24) & 0xff;
  65 }
  66
  67 } // detail
  68 } // websocket
  69 } // beast
  70
  71 #endif