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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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   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 <utility>
  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         return bIsMimeEncoding;
  74     }
  75
  76
  77     OCharsetMap::~OCharsetMap()
  78     {
  79     }
  80
  81
  82     OCharsetMap::CharsetIterator OCharsetMap::begin() const
  83     {
  84         ensureConstructed( );
  85         return CharsetIterator(this, m_aEncodings.begin() );
  86     }
  87
  88
  89     OCharsetMap::CharsetIterator    OCharsetMap::find(const rtl_TextEncoding _eEncoding) const
  90     {
  91         ensureConstructed( );
  92         return CharsetIterator( this, m_aEncodings.find( _eEncoding ) );
  93     }
  94
  95
  96     OCharsetMap::CharsetIterator    OCharsetMap::findIanaName(std::u16string_view _rIanaName) const
  97     {
  98         ensureConstructed( );
  99
 100         rtl_TextEncoding eEncoding = RTL_TEXTENCODING_DONTKNOW;
 101         if ( !_rIanaName.empty() )
 102         {
 103             // byte string conversion
 104             OString sMimeByteString = OUStringToOString( _rIanaName, RTL_TEXTENCODING_ASCII_US );
 105             // look up
 106             eEncoding = rtl_getTextEncodingFromMimeCharset( sMimeByteString.getStr() );
 107
 108             if ( RTL_TEXTENCODING_DONTKNOW == eEncoding )
 109             {   // if we're here, the name is not empty, but unknown -> this is an invalid name
 110                 return end();
 111             }
 112         }
 113
 114         return find( eEncoding );
 115     }
 116
 117
 118     OCharsetMap::CharsetIterator OCharsetMap::end() const
 119     {
 120         ensureConstructed( );
 121
 122         return CharsetIterator( this, m_aEncodings.end() );
 123     }
 124
 125
 126     CharsetIteratorDerefHelper::CharsetIteratorDerefHelper( const CharsetIteratorDerefHelper& _rSource )
 127         :m_eEncoding( _rSource.m_eEncoding )
 128         ,m_aIanaName( _rSource.m_aIanaName )
 129     {
 130     }
 131
 132
 133     CharsetIteratorDerefHelper:: CharsetIteratorDerefHelper(const rtl_TextEncoding _eEncoding, OUString _aIanaName )
 134         :m_eEncoding( _eEncoding )
 135         ,m_aIanaName(std::move( _aIanaName ))
 136     {
 137     }
 138
 139     OCharsetMap::CharsetIterator::CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator _aPos )
 140         :m_pContainer( _pContainer )
 141         ,m_aPos(std::move( _aPos ))
 142     {
 143         OSL_ENSURE( m_pContainer, "OCharsetMap::CharsetIterator::CharsetIterator : invalid container!" );
 144     }
 145
 146     CharsetIteratorDerefHelper OCharsetMap::CharsetIterator::operator*() const
 147     {
 148         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator*: invalid position!");
 149
 150         rtl_TextEncoding eEncoding = *m_aPos;
 151         OUString sIanaName;
 152
 153         if ( RTL_TEXTENCODING_DONTKNOW != eEncoding )
 154         {   // it's not the virtual "system charset"
 155             const char* pIanaName = rtl_getMimeCharsetFromTextEncoding( eEncoding );
 156             OSL_ENSURE( pIanaName, "OCharsetMap::CharsetIterator: invalid mime name!" );
 157             if ( pIanaName )
 158                 sIanaName = OUString::createFromAscii( pIanaName );
 159         }
 160         return CharsetIteratorDerefHelper( eEncoding, sIanaName );
 161     }
 162
 163
 164     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator++()
 165     {
 166         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator++ : invalid position!" );
 167         if ( m_aPos != m_pContainer->m_aEncodings.end())
 168             ++m_aPos;
 169         return *this;
 170     }
 171
 172
 173     const OCharsetMap::CharsetIterator& OCharsetMap::CharsetIterator::operator--()
 174     {
 175         OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.begin(), "OCharsetMap::CharsetIterator::operator-- : invalid position!" );
 176         if ( m_aPos != m_pContainer->m_aEncodings.begin() )
 177             --m_aPos;
 178         return *this;
 179     }
 180
 181
 182     bool operator==(const OCharsetMap::CharsetIterator& lhs, const OCharsetMap::CharsetIterator& rhs)
 183     {
 184         return ( lhs.m_pContainer == rhs.m_pContainer ) && ( lhs.m_aPos == rhs.m_aPos );
 185     }
 186
 187
 188 }   // namespace dbtools
 189
 190
 191 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */