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

   1 //
   2 // Copyright (c) 2016-2019 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
  10 // This is a derivative work based on Zlib, copyright below:
  11 /*
  12     Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
  13
  14     This software is provided 'as-is', without any express or implied
  15     warranty.  In no event will the authors be held liable for any damages
  16     arising from the use of this software.
  17
  18     Permission is granted to anyone to use this software for any purpose,
  19     including commercial applications, and to alter it and redistribute it
  20     freely, subject to the following restrictions:
  21
  22     1. The origin of this software must not be misrepresented; you must not
  23        claim that you wrote the original software. If you use this software
  24        in a product, an acknowledgment in the product documentation would be
  25        appreciated but is not required.
  26     2. Altered source versions must be plainly marked as such, and must not be
  27        misrepresented as being the original software.
  28     3. This notice may not be removed or altered from any source distribution.
  29
  30     Jean-loup Gailly        Mark Adler
  31     jloup@gzip.org          madler@alumni.caltech.edu
  32
  33     The data format used by the zlib library is described by RFCs (Request for
  34     Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
  35     (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
  36 */
  37
  38 #ifndef BOOST_BEAST_ZLIB_IMPL_ERROR_IPP
  39 #define BOOST_BEAST_ZLIB_IMPL_ERROR_IPP
  40
  41 #include <boost/beast/zlib/error.hpp>
  42 #include <type_traits>
  43
  44 namespace boost {
  45 namespace beast {
  46 namespace zlib {
  47 namespace detail {
  48
  49 class error_codes : public error_category
  50 {
  51 public:
  52     const char*
  53     name() const noexcept override
  54     {
  55         return "boost.beast.zlib";
  56     }
  57
  58     std::string
  59     message(int ev) const override
  60     {
  61         switch(static_cast<error>(ev))
  62         {
  63         case error::need_buffers: return "need buffers";
  64         case error::end_of_stream: return "unexpected end of deflate stream";
  65         case error::need_dict: return "need dict";
  66         case error::stream_error: return "stream error";
  67
  68         case error::invalid_block_type: return "invalid block type";
  69         case error::invalid_stored_length: return "invalid stored block length";
  70         case error::too_many_symbols: return "too many symbols";
  71         case error::invalid_code_lengths: return "invalid code lengths";
  72         case error::invalid_bit_length_repeat: return "invalid bit length repeat";
  73         case error::missing_eob: return "missing end of block code";
  74         case error::invalid_literal_length: return "invalid literal/length code";
  75         case error::invalid_distance_code: return "invalid distance code";
  76         case error::invalid_distance: return "invalid distance";
  77
  78         case error::over_subscribed_length: return "over-subscribed length";
  79         case error::incomplete_length_set: return "incomplete length set";
  80
  81         case error::general:
  82         default:
  83             return "beast.zlib error";
  84         }
  85     }
  86
  87     error_condition
  88     default_error_condition(int ev) const noexcept override
  89     {
  90         return error_condition{ev, *this};
  91     }
  92
  93     bool
  94     equivalent(int ev,
  95         error_condition const& condition
  96             ) const noexcept override
  97     {
  98         return condition.value() == ev &&
  99             &condition.category() == this;
 100     }
 101
 102     bool
 103     equivalent(error_code const& error, int ev) const noexcept override
 104     {
 105         return error.value() == ev &&
 106             &error.category() == this;
 107     }
 108 };
 109
 110 } // detail
 111
 112 error_code
 113 make_error_code(error ev)
 114 {
 115     static detail::error_codes const cat{};
 116     return error_code{static_cast<
 117         std::underlying_type<error>::type>(ev), cat};
 118 }
 119
 120 } // zlib
 121 } // beast
 122 } // boost
 123
 124 #endif