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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
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 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"
#include <connectivity/dbcharset.hxx>
#include "diagnose_ex.h"
#include <osl/diagnose.h>
#include <rtl/tencinfo.h>

//.........................................................................
namespace dbtools
{
//.........................................................................

	//=========================================================================
	//= OCharsetMap
	//=========================================================================
	//-------------------------------------------------------------------------
	OCharsetMap::OCharsetMap()
	{
	}

	//-------------------------------------------------------------------------
	void OCharsetMap::lateConstruct()
	{
		const rtl_TextEncoding eFirstEncoding = RTL_TEXTENCODING_DONTKNOW;
		const rtl_TextEncoding eLastEncoding = 100;		// TODO: a define in rtl/textenc.h would be fine here ...
		OSL_ENSURE( 0 == eFirstEncoding, "OCharsetMap::OCharsetMap: somebody changed the numbers!" );

		rtl_TextEncodingInfo aInfo; aInfo.StructSize = sizeof( rtl_TextEncodingInfo );
		for ( rtl_TextEncoding eEncoding = eFirstEncoding; eEncoding < eLastEncoding; ++eEncoding )
		{
			if	(	( RTL_TEXTENCODING_DONTKNOW == eEncoding )	// this is always allowed - it has the special meaning "system encoding"
				||	(	rtl_getTextEncodingInfo( eEncoding, &aInfo )
					&&	approveEncoding( eEncoding, aInfo )
					)
				)
			{
				m_aEncodings.insert( eEncoding );
			}
		}

		OSL_ENSURE( find( RTL_TEXTENCODING_MS_1252 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding ANSI!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_APPLE_ROMAN ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding macintosh!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_437 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM437!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_850) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM850!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_860 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM860!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_861 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM861!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_863 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM863!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_865 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM865!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_IBM_866 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding IBM866!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_DONTKNOW ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding SYSTEM!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_UTF8 ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding UTF-8!" );
		OSL_ENSURE( find( RTL_TEXTENCODING_BIG5_HKSCS ) != end(), "OCharsetMap::lateConstruct: missing compatibility encoding Big5-HKSCS!" );
	}

	//-------------------------------------------------------------------------
	sal_Bool OCharsetMap::approveEncoding( const rtl_TextEncoding _eEncoding, const rtl_TextEncodingInfo& _rInfo ) const
	{
		sal_Bool bIsMimeEncoding = 0 != ( _rInfo.Flags & RTL_TEXTENCODING_INFO_MIME );
		OSL_ENSURE( !bIsMimeEncoding || rtl_getMimeCharsetFromTextEncoding( _eEncoding ),
				"OCharsetMap::OCharsetMap: inconsistence in rtl!" );
        OSL_UNUSED( _eEncoding );
		return bIsMimeEncoding;
	}

	//-------------------------------------------------------------------------
	OCharsetMap::~OCharsetMap()
	{
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator OCharsetMap::begin() const
	{
		ensureConstructed( );
		return CharsetIterator(this, m_aEncodings.begin() );
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator	OCharsetMap::find(const rtl_TextEncoding _eEncoding) const
	{
		ensureConstructed( );
		return CharsetIterator( this, m_aEncodings.find( _eEncoding ) );
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator	OCharsetMap::find(const ::rtl::OUString& _rIanaName, const IANA&) const
	{
		ensureConstructed( );

		rtl_TextEncoding eEncoding = RTL_TEXTENCODING_DONTKNOW;
		if ( _rIanaName.getLength() )
		{
			// byte string conversion
			::rtl::OString sMimeByteString( _rIanaName.getStr(), _rIanaName.getLength(), RTL_TEXTENCODING_ASCII_US );
			// look up
			eEncoding = rtl_getTextEncodingFromMimeCharset( sMimeByteString.getStr() );

			if ( RTL_TEXTENCODING_DONTKNOW == eEncoding )
			{	// if we're here, the name is not empty, but unknown -> this is an invalid name
				return end();
			}
		}

		return find( eEncoding );
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator OCharsetMap::end() const
	{
		ensureConstructed( );

		return CharsetIterator( this, m_aEncodings.end() );
	}

	//=========================================================================
	//= CharsetIteratorDerefHelper
	//=========================================================================
	//-------------------------------------------------------------------------
	CharsetIteratorDerefHelper::CharsetIteratorDerefHelper( const CharsetIteratorDerefHelper& _rSource )
		:m_eEncoding( _rSource.m_eEncoding )
		,m_aIanaName( _rSource.m_aIanaName )
	{
	}

	//-------------------------------------------------------------------------
	CharsetIteratorDerefHelper:: CharsetIteratorDerefHelper(const rtl_TextEncoding _eEncoding, const ::rtl::OUString& _rIanaName )
		:m_eEncoding( _eEncoding )
		,m_aIanaName( _rIanaName )
	{
	}

	//-------------------------------------------------------------------------
	CharsetIteratorDerefHelper::CharsetIteratorDerefHelper()
		:m_eEncoding(RTL_TEXTENCODING_DONTKNOW)
	{
	}

	//=========================================================================
	//= OCharsetMap::CharsetIterator
	//=========================================================================
	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator::CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator _aPos )
		:m_pContainer( _pContainer )
		,m_aPos( _aPos )
	{
		OSL_ENSURE( m_pContainer, "OCharsetMap::CharsetIterator::CharsetIterator : invalid container!" );
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator::CharsetIterator(const CharsetIterator& _rSource)
		:m_pContainer( _rSource.m_pContainer )
		,m_aPos( _rSource.m_aPos )
	{
	}

	//-------------------------------------------------------------------------
	OCharsetMap::CharsetIterator::~CharsetIterator()
	{
	}

	//-------------------------------------------------------------------------
	CharsetIteratorDerefHelper OCharsetMap::CharsetIterator::operator*() const
	{
		OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator*: invalid position!");

		rtl_TextEncoding eEncoding = *m_aPos;
		::rtl::OUString sIanaName;

		if ( RTL_TEXTENCODING_DONTKNOW != eEncoding )
		{	// it's not the virtual "system charset"
			const char* pIanaName = rtl_getMimeCharsetFromTextEncoding( eEncoding );
			OSL_ENSURE( pIanaName, "OCharsetMap::CharsetIterator: invalid mime name!" );
			if ( pIanaName )
				sIanaName = ::rtl::OUString::createFromAscii( pIanaName );
		}
		return CharsetIteratorDerefHelper( eEncoding, sIanaName );
	}

	//-------------------------------------------------------------------------
	const OCharsetMap::CharsetIterator&	OCharsetMap::CharsetIterator::operator++()
	{
		OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.end(), "OCharsetMap::CharsetIterator::operator++ : invalid position!" );
		if ( m_aPos != m_pContainer->m_aEncodings.end())
			++m_aPos;
		return *this;
	}

	//-------------------------------------------------------------------------
	const OCharsetMap::CharsetIterator&	OCharsetMap::CharsetIterator::operator--()
	{
		OSL_ENSURE( m_aPos != m_pContainer->m_aEncodings.begin(), "OCharsetMap::CharsetIterator::operator-- : invalid position!" );
		if ( m_aPos != m_pContainer->m_aEncodings.begin() )
			--m_aPos;
		return *this;
	}

	//-------------------------------------------------------------------------
	bool operator==(const OCharsetMap::CharsetIterator& lhs, const OCharsetMap::CharsetIterator& rhs)
	{
		return ( lhs.m_pContainer == rhs.m_pContainer ) && ( lhs.m_aPos == rhs.m_aPos );
	}

//.........................................................................
}	// namespace dbtools
//.........................................................................