ceph/src/boost/boost/beast/zlib/impl/error.ipp

   1 //
   2 // Copyright (c) 2016-2017 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 // Official repository: https://github.com/boostorg/beast
   8 //
   9 // This is a derivative work based on Zlib, copyright below:
  10 /*
  11     Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
  12
  13     This software is provided 'as-is', without any express or implied
  14     warranty.  In no event will the authors be held liable for any damages
  15     arising from the use of this software.
  16
  17     Permission is granted to anyone to use this software for any purpose,
  18     including commercial applications, and to alter it and redistribute it
  19     freely, subject to the following restrictions:
  20
  21     1. The origin of this software must not be misrepresented; you must not
  22        claim that you wrote the original software. If you use this software
  23        in a product, an acknowledgment in the product documentation would be
  24        appreciated but is not required.
  25     2. Altered source versions must be plainly marked as such, and must not be
  26        misrepresented as being the original software.
  27     3. This notice may not be removed or altered from any source distribution.
  28
  29     Jean-loup Gailly        Mark Adler
  30     jloup@gzip.org          madler@alumni.caltech.edu
  31
  32     The data format used by the zlib library is described by RFCs (Request for
  33     Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
  34     (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
  35 */
  36
  37 #ifndef BOOST_BEAST_ZLIB_IMPL_ERROR_IPP
  38 #define BOOST_BEAST_ZLIB_IMPL_ERROR_IPP
  39
  40 #include <boost/beast/core/error.hpp>
  41 #include <type_traits>
  42
  43 namespace boost {
  44
  45 namespace system {
  46 template<>
  47 struct is_error_code_enum<beast::zlib::error>
  48 {
  49     static bool const value = true;
  50 };
  51 } // system
  52
  53 namespace beast {
  54 namespace zlib {
  55 namespace detail {
  56
  57 class zlib_error_category : public error_category
  58 {
  59 public:
  60     const char*
  61     name() const noexcept override
  62     {
  63         return "beast.zlib";
  64     }
  65
  66     std::string
  67     message(int ev) const override
  68     {
  69         switch(static_cast<error>(ev))
  70         {
  71         case error::need_buffers: return "need buffers";
  72         case error::end_of_stream: return "unexpected end of deflate stream";
  73         case error::stream_error: return "stream error";
  74
  75         case error::invalid_block_type: return "invalid block type";
  76         case error::invalid_stored_length: return "invalid stored block length";
  77         case error::too_many_symbols: return "too many symbols";
  78         case error::invalid_code_lenths: return "invalid code lengths";
  79         case error::invalid_bit_length_repeat: return "invalid bit length repeat";
  80         case error::missing_eob: return "missing end of block code";
  81         case error::invalid_literal_length: return "invalid literal/length code";
  82         case error::invalid_distance_code: return "invalid distance code";
  83         case error::invalid_distance: return "invalid distance";
  84
  85         case error::over_subscribed_length: return "over-subscribed length";
  86         case error::incomplete_length_set: return "incomplete length set";
  87
  88         case error::general:
  89         default:
  90             return "beast.zlib error";
  91         }
  92     }
  93
  94     error_condition
  95     default_error_condition(int ev) const noexcept override
  96     {
  97         return error_condition{ev, *this};
  98     }
  99
 100     bool
 101     equivalent(int ev,
 102         error_condition const& condition
 103             ) const noexcept override
 104     {
 105         return condition.value() == ev &&
 106             &condition.category() == this;
 107     }
 108
 109     bool
 110     equivalent(error_code const& error, int ev) const noexcept override
 111     {
 112         return error.value() == ev &&
 113             &error.category() == this;
 114     }
 115 };
 116
 117 inline
 118 error_category const&
 119 get_error_category()
 120 {
 121     static zlib_error_category const cat{};
 122     return cat;
 123 }
 124
 125 } // detail
 126
 127 inline
 128 error_code
 129 make_error_code(error ev)
 130 {
 131     return error_code{
 132         static_cast<std::underlying_type<error>::type>(ev),
 133             detail::get_error_category()};
 134 }
 135
 136 } // zlib
 137 } // beast
 138 } // boost
 139
 140 #endif