archive/iterators/base64_exception.hpp

0001 #ifndef BOOST_ARCHIVE_ITERATORS_BASE64_EXCEPTION_HPP
0002 #define BOOST_ARCHIVE_ITERATORS_BASE64_EXCEPTION_HPP
0003
0004 // MS compatible compilers support #pragma once
0005 #if defined(_MSC_VER)
0006 # pragma once
0007 #endif
0008
0009 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
0010 // base64_exception.hpp:
0011
0012 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
0013 // Use, modification and distribution is subject to the Boost Software
0014 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0015 // http://www.boost.org/LICENSE_1_0.txt)
0016
0017 //  See http://www.boost.org for updates, documentation, and revision history.
0018
0019 #include <boost/config.hpp>
0020 #ifndef BOOST_NO_EXCEPTIONS
0021 #include <exception>
0022
0023 #include <boost/assert.hpp>
0024
0025 namespace boost {
0026 namespace archive {
0027 namespace iterators {
0028
0029 //////////////////////////////////////////////////////////////////////
0030 // exceptions thrown by base64s
0031 //
0032 class base64_exception : public std::exception
0033 {
0034 public:
0035     typedef enum {
0036         invalid_code,       // attempt to encode a value > 6 bits
0037         invalid_character,  // decode a value not in base64 char set
0038         other_exception
0039     } exception_code;
0040     exception_code code;
0041
0042     base64_exception(exception_code c = other_exception) : code(c)
0043     {}
0044
0045     virtual const char *what( ) const BOOST_NOEXCEPT_OR_NOTHROW
0046     {
0047         const char *msg = "unknown exception code";
0048         switch(code){
0049         case invalid_code:
0050             msg = "attempt to encode a value > 6 bits";
0051             break;
0052         case invalid_character:
0053             msg = "attempt to decode a value not in base64 char set";
0054             break;
0055         default:
0056             BOOST_ASSERT(false);
0057             break;
0058         }
0059         return msg;
0060     }
0061 };
0062
0063 } // namespace iterators
0064 } // namespace archive
0065 } // namespace boost
0066
0067 #endif //BOOST_NO_EXCEPTIONS
0068 #endif //BOOST_ARCHIVE_ITERATORS_ARCHIVE_EXCEPTION_HPP