connectivity/source/commontools/dbcharset.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <connectivity/dbcharset.hxx>
  21 #include <osl/diagnose.h>
  22 #include <rtl/tencinfo.h>
  23
  24
  25 namespace dbtools
  26 {
  27
  28     OCharsetMap::OCharsetMap()
  29     {
  30     }
  31
  32
  33     void OCharsetMap::lateConstruct()
  34     {
  35         const rtl_TextEncoding eFirstEncoding = RTL_TEXTENCODING_DONTKNOW;
  36         const rtl_TextEncoding eLastEncoding = 100;     // TODO: a define in rtl/textenc.h would be fine here ...
  37         OSL_ENSURE( 0 == eFirstEncoding, "OCharsetMap::OCharsetMap: somebody changed the numbers!" );
  38
  39         rtl_TextEncodingInfo aInfo; aInfo.StructSize = sizeof( rtl_TextEncodingInfo );
  40         for ( rtl_TextEncoding eEncoding = eFirstEncoding; eEncoding < eLastEncoding; ++eEncoding )
  41         {
  42             if  (   ( RTL_TEXTENCODING_DONTKNOW == eEncoding )  // this is always allowed - it has the special meaning "system encoding"
  43                 ||  (   rtl_getTextEncodingInfo( eEncoding, &aInfo )
  44                     &&  approveEncoding( eEncoding, aInfo )
  45                     )
  46                 )
  47             {
  48                 m_aEncodings.insert( eEncoding );
  49             }
  50         }
  51
  52         OSL_ENSURE( find( RTL_TEXTENCODING_MS_1252 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding ANSI!" );
  53         OSL_ENSURE( find( RTL_TEXTENCODING_APPLE_ROMAN ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding macintosh!" );
  54         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_437 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM437!" );
  55         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_850) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM850!" );
  56         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_860 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM860!" );
  57         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_861 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM861!" );
  58         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_863 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM863!" );
  59         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_865 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM865!" );
  60         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_866 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM866!" );
  61         OSL_ENSURE( find( RTL_TEXTENCODING_DONTKNOW ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding SYSTEM!" );
  62         OSL_ENSURE( find( RTL_TEXTENCODING_UTF8 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding UTF-8!" );
  63         OSL_ENSURE( find( RTL_TEXTENCODING_BIG5_HKSCS ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding Big5-HKSCS!" );
  64     }
  65
  66
  67     bool OCharsetMap::approveEncoding( const rtl_TextEncoding _eEncoding, const rtl_TextEncodingInfo& _rInfo ) const
  68     {
  69         bool bIsMimeEncoding = 0 != ( _rInfo.Flags & RTL_TEXTENCODING_INFO_MIME );
  70         OSL_ENSURE( !bIsMimeEncoding || rtl_getMimeCharsetFromTextEncoding( _eEncoding ),
  71                 "OCharsetMap::OCharsetMap: inconsistence in rtl!" );
  72         return bIsMimeEncoding;
  73     }
  74
  75
  76     OCharsetMap::~OCharsetMap()
  77     {
  78     }
  79
  80
  81     OCharsetMap::CharsetIterator OCharsetMap::begin() const
  82     {
  83         ensureConstructed( );
  84         return CharsetIterator(this, m_aEncodings.begin() );
  85     }
  86
  87
  88     OCharsetMap::CharsetIterator    OCharsetMap::find(const rtl_TextEncoding _eEncoding) const
  89     {
  90         ensureConstructed( );
  91         return CharsetIterator( this, m_aEncodings.find( _eEncoding ) );
  92     }
  93
  94
  95     OCharsetMap::CharsetIterator    OCharsetMap::findIanaName(const OUString& _rIanaName) const
  96     {
  97         ensureConstructed( );
  98
  99         rtl_TextEncoding eEncoding = RTL_TEXTENCODING_DONTKNOW;
 100         if ( !_rIanaName.isEmpty() )
 101         {
 102             // byte string conversion
 103             OString sMimeByteString( _rIanaName.getStr(), _rIanaName.getLength(), RTL_TEXTENCODING_ASCII_US );
 104             // look up
 105             eEncoding = rtl_getTextEncodingFromMimeCharset( sMimeByteString.getStr() );
 106
 107             if ( RTL_TEXTENCODING_DONTKNOW == eEncoding )
 108             {   // if we're here, the name is not empty, but unknown -> this is an invalid name
 109                 return end();
 110             }
 111         }
 112
 113         return find( eEncoding );
 114     }
 115
 116
 117     OCharsetMap::CharsetIterator OCharsetMap::end() const
 118     {
 119         ensureConstructed( );
 120
 121         return CharsetIterator( this, m_aEncodings.end() );
 122     }
 123
 124
 125     CharsetIteratorDerefHelper::CharsetIteratorDerefHelper( const CharsetIteratorDerefHelper& _rSource )
 126         :m_eEncoding( _rSource.m_eEncoding )
 127         ,m_aIanaName( _rSource.m_aIanaName )
 128     {
 129     }
 130
 131
 132     CharsetIteratorDerefHelper:: CharsetIteratorDerefHelper(const rtl_TextEncoding _eEncoding, const OUString& _rIanaName )
 133         :m_eEncoding( _eEncoding )
 134         ,m_aIanaName( _rIanaName )
 135     {
 136     }
 137
 138     OCharsetMap::CharsetIterator::CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator const & _aPos )
 139         :m_pContainer( _pContainer )
 140         ,m_aPos( _aPos )
 141     {
 142         OSL_ENSURE( m_pContainer, "OCharsetMap::CharsetIterator::CharsetIterator : invalid container!" );
 143     }
 144
 145     CharsetIteratorDerefHelper OCharsetMap::CharsetIterator::operator*() const
 146     {
 147         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator*: invalid position!");
 148
 149         rtl_TextEncoding eEncoding = *m_aPos;
 150         OUString sIanaName;
 151
 152         if ( RTL_TEXTENCODING_DONTKNOW != eEncoding )
 153         {   // it's not the virtual "system charset"
 154             const char* pIanaName = rtl_getMimeCharsetFromTextEncoding( eEncoding );
 155             OSL_ENSURE( pIanaName, "OCharsetMap::CharsetIterator: invalid mime name!" );
 156             if ( pIanaName )
 157                 sIanaName = OUString::createFromAscii( pIanaName );
 158         }
 159         return CharsetIteratorDerefHelper( eEncoding, sIanaName );
 160     }
 161
 162
 163     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator++()
 164     {
 165         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator++ : invalid position!" );
 166         if ( m_aPos != m_pContainer->m_aEncodings.end())
 167             ++m_aPos;
 168         return *this;
 169     }
 170
 171
 172     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator--()
 173     {
 174         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.begin(), "OCharsetMap::CharsetIterator::operator-- : invalid position!" );
 175         if ( m_aPos != m_pContainer->m_aEncodings.begin() )
 176             --m_aPos;
 177         return *this;
 178     }
 179
 180
 181     bool operator==(const OCharsetMap::CharsetIterator& lhs, const OCharsetMap::CharsetIterator& rhs)
 182     {
 183         return ( lhs.m_pContainer == rhs.m_pContainer ) && ( lhs.m_aPos == rhs.m_aPos );
 184     }
 185
 186
 187 }   // namespace dbtools
 188
 189
 190 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */