connectivity/source/commontools/dbcharset.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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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 "diagnose_ex.h"
  22 #include <osl/diagnose.h>
  23 #include <rtl/tencinfo.h>
  24
  25
  26 namespace dbtools
  27 {
  28
  29     OCharsetMap::OCharsetMap()
  30     {
  31     }
  32
  33
  34     void OCharsetMap::lateConstruct()
  35     {
  36         const rtl_TextEncoding eFirstEncoding = RTL_TEXTENCODING_DONTKNOW;
  37         const rtl_TextEncoding eLastEncoding = 100;     // TODO: a define in rtl/textenc.h would be fine here ...
  38         OSL_ENSURE( 0 == eFirstEncoding, "OCharsetMap::OCharsetMap: somebody changed the numbers!" );
  39
  40         rtl_TextEncodingInfo aInfo; aInfo.StructSize = sizeof( rtl_TextEncodingInfo );
  41         for ( rtl_TextEncoding eEncoding = eFirstEncoding; eEncoding < eLastEncoding; ++eEncoding )
  42         {
  43             if  (   ( RTL_TEXTENCODING_DONTKNOW == eEncoding )  // this is always allowed - it has the special meaning "system encoding"
  44                 ||  (   rtl_getTextEncodingInfo( eEncoding, &aInfo )
  45                     &&  approveEncoding( eEncoding, aInfo )
  46                     )
  47                 )
  48             {
  49                 m_aEncodings.insert( eEncoding );
  50             }
  51         }
  52
  53         OSL_ENSURE( find( RTL_TEXTENCODING_MS_1252 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding ANSI!" );
  54         OSL_ENSURE( find( RTL_TEXTENCODING_APPLE_ROMAN ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding macintosh!" );
  55         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_437 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM437!" );
  56         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_850) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM850!" );
  57         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_860 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM860!" );
  58         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_861 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM861!" );
  59         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_863 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM863!" );
  60         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_865 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM865!" );
  61         OSL_ENSURE( find( RTL_TEXTENCODING_IBM_866 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM866!" );
  62         OSL_ENSURE( find( RTL_TEXTENCODING_DONTKNOW ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding SYSTEM!" );
  63         OSL_ENSURE( find( RTL_TEXTENCODING_UTF8 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding UTF-8!" );
  64         OSL_ENSURE( find( RTL_TEXTENCODING_BIG5_HKSCS ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding Big5-HKSCS!" );
  65     }
  66
  67
  68     bool OCharsetMap::approveEncoding( const rtl_TextEncoding _eEncoding, const rtl_TextEncodingInfo& _rInfo ) const
  69     {
  70         bool bIsMimeEncoding = 0 != ( _rInfo.Flags & RTL_TEXTENCODING_INFO_MIME );
  71         OSL_ENSURE( !bIsMimeEncoding || rtl_getMimeCharsetFromTextEncoding( _eEncoding ),
  72                 "OCharsetMap::OCharsetMap: inconsistence in rtl!" );
  73         OSL_UNUSED( _eEncoding );
  74         return bIsMimeEncoding;
  75     }
  76
  77
  78     OCharsetMap::~OCharsetMap()
  79     {
  80     }
  81
  82
  83     OCharsetMap::CharsetIterator OCharsetMap::begin() const
  84     {
  85         ensureConstructed( );
  86         return CharsetIterator(this, m_aEncodings.begin() );
  87     }
  88
  89
  90     OCharsetMap::CharsetIterator    OCharsetMap::find(const rtl_TextEncoding _eEncoding) const
  91     {
  92         ensureConstructed( );
  93         return CharsetIterator( this, m_aEncodings.find( _eEncoding ) );
  94     }
  95
  96
  97     OCharsetMap::CharsetIterator    OCharsetMap::find(const OUString& _rIanaName, const IANA&) const
  98     {
  99         ensureConstructed( );
 100
 101         rtl_TextEncoding eEncoding = RTL_TEXTENCODING_DONTKNOW;
 102         if ( !_rIanaName.isEmpty() )
 103         {
 104             // byte string conversion
 105             OString sMimeByteString( _rIanaName.getStr(), _rIanaName.getLength(), RTL_TEXTENCODING_ASCII_US );
 106             // look up
 107             eEncoding = rtl_getTextEncodingFromMimeCharset( sMimeByteString.getStr() );
 108
 109             if ( RTL_TEXTENCODING_DONTKNOW == eEncoding )
 110             {   // if we're here, the name is not empty, but unknown -> this is an invalid name
 111                 return end();
 112             }
 113         }
 114
 115         return find( eEncoding );
 116     }
 117
 118
 119     OCharsetMap::CharsetIterator OCharsetMap::end() const
 120     {
 121         ensureConstructed( );
 122
 123         return CharsetIterator( this, m_aEncodings.end() );
 124     }
 125
 126
 127     CharsetIteratorDerefHelper::CharsetIteratorDerefHelper( const CharsetIteratorDerefHelper& _rSource )
 128         :m_eEncoding( _rSource.m_eEncoding )
 129         ,m_aIanaName( _rSource.m_aIanaName )
 130     {
 131     }
 132
 133
 134     CharsetIteratorDerefHelper:: CharsetIteratorDerefHelper(const rtl_TextEncoding _eEncoding, const OUString& _rIanaName )
 135         :m_eEncoding( _eEncoding )
 136         ,m_aIanaName( _rIanaName )
 137     {
 138     }
 139
 140     OCharsetMap::CharsetIterator::CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator _aPos )
 141         :m_pContainer( _pContainer )
 142         ,m_aPos( _aPos )
 143     {
 144         OSL_ENSURE( m_pContainer, "OCharsetMap::CharsetIterator::CharsetIterator : invalid container!" );
 145     }
 146
 147
 148     OCharsetMap::CharsetIterator::CharsetIterator(const CharsetIterator& _rSource)
 149         :m_pContainer( _rSource.m_pContainer )
 150         ,m_aPos( _rSource.m_aPos )
 151     {
 152     }
 153
 154
 155     OCharsetMap::CharsetIterator::~CharsetIterator()
 156     {
 157     }
 158
 159
 160     CharsetIteratorDerefHelper OCharsetMap::CharsetIterator::operator*() const
 161     {
 162         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator*: invalid position!");
 163
 164         rtl_TextEncoding eEncoding = *m_aPos;
 165         OUString sIanaName;
 166
 167         if ( RTL_TEXTENCODING_DONTKNOW != eEncoding )
 168         {   // it's not the virtual "system charset"
 169             const char* pIanaName = rtl_getMimeCharsetFromTextEncoding( eEncoding );
 170             OSL_ENSURE( pIanaName, "OCharsetMap::CharsetIterator: invalid mime name!" );
 171             if ( pIanaName )
 172                 sIanaName = OUString::createFromAscii( pIanaName );
 173         }
 174         return CharsetIteratorDerefHelper( eEncoding, sIanaName );
 175     }
 176
 177
 178     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator++()
 179     {
 180         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator++ : invalid position!" );
 181         if ( m_aPos != m_pContainer->m_aEncodings.end())
 182             ++m_aPos;
 183         return *this;
 184     }
 185
 186
 187     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator--()
 188     {
 189         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.begin(), "OCharsetMap::CharsetIterator::operator-- : invalid position!" );
 190         if ( m_aPos != m_pContainer->m_aEncodings.begin() )
 191             --m_aPos;
 192         return *this;
 193     }
 194
 195
 196     bool operator==(const OCharsetMap::CharsetIterator& lhs, const OCharsetMap::CharsetIterator& rhs)
 197     {
 198         return ( lhs.m_pContainer == rhs.m_pContainer ) && ( lhs.m_aPos == rhs.m_aPos );
 199     }
 200
 201
 202 }   // namespace dbtools
 203
 204
 205 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */