xref: /AOO41X/main/dtrans/source/win32/dtobj/TxtCnvtHlp.cxx (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
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 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_dtrans.hxx"

//------------------------------------------------------------------------
// includes
//------------------------------------------------------------------------
#include <osl/diagnose.h>
#include "TxtCnvtHlp.hxx"
#include "DTransHelper.hxx"
#include "..\misc\ImplHelper.hxx"

using namespace ::com::sun::star::datatransfer;
using namespace ::com::sun::star::uno;

//------------------------------------------------------------------
// assuming a '\0' terminated string if no length specified
//------------------------------------------------------------------

int CalcBuffSizeForTextConversion( UINT code_page, LPCSTR lpMultiByteString, int nLen = -1 )
{
	return ( MultiByteToWideChar( code_page,
								0,
								lpMultiByteString,
								nLen,
								NULL,
								0 ) * sizeof( sal_Unicode ) );
}

//------------------------------------------------------------------
// assuming a '\0' terminated string if no length specified
//------------------------------------------------------------------

int CalcBuffSizeForTextConversion( UINT code_page, LPCWSTR lpWideCharString, int nLen = -1 )
{
	return WideCharToMultiByte( code_page,
								0,
								lpWideCharString,
								nLen,
								NULL,
								0,
								NULL,
								NULL );
}

//------------------------------------------------------------------
// converts text in one code page into unicode text
// automatically calculates the necessary buffer size and allocates
// the buffer
//------------------------------------------------------------------

int MultiByteToWideCharEx( UINT cp_src,
						   LPCSTR lpMultiByteString,
						   sal_uInt32 lenStr,
						   CStgTransferHelper& refDTransHelper,
						   BOOL bEnsureTrailingZero )
{
	OSL_ASSERT( IsValidCodePage( cp_src ) );
	OSL_ASSERT( NULL != lpMultiByteString );

	// calculate the required buff size
	int reqSize = CalcBuffSizeForTextConversion( cp_src, lpMultiByteString, lenStr );

	if ( bEnsureTrailingZero )
		reqSize += sizeof( sal_Unicode );

	// initialize the data-transfer helper
	refDTransHelper.init( reqSize );

	// setup a global memory pointer
	CRawHGlobalPtr ptrHGlob( refDTransHelper );

	// do the converssion an return
	return MultiByteToWideChar( cp_src,
								0,
								lpMultiByteString,
								lenStr,
								static_cast< LPWSTR >( ptrHGlob.GetMemPtr( ) ),
								ptrHGlob.MemSize( ) );
}

//------------------------------------------------------------------
// converts unicode text into text of the specified code page
// automatically calculates the necessary buffer size and allocates
// the buffer
//------------------------------------------------------------------

int WideCharToMultiByteEx( UINT cp_dest,
						   LPCWSTR lpWideCharString,
						   sal_uInt32 lenStr,
						   CStgTransferHelper& refDTransHelper,
						   BOOL bEnsureTrailingZero )
{
	OSL_ASSERT( IsValidCodePage( cp_dest ) );
	OSL_ASSERT( NULL != lpWideCharString );

	// calculate the required buff size
	int reqSize = CalcBuffSizeForTextConversion( cp_dest, lpWideCharString, lenStr );

	if ( bEnsureTrailingZero )
		reqSize += sizeof( sal_Int8 );

	// initialize the data-transfer helper
	refDTransHelper.init( reqSize );

	// setup a global memory pointer
	CRawHGlobalPtr ptrHGlob( refDTransHelper );

	// do the converssion an return
	return WideCharToMultiByte( cp_dest,
								0,
								lpWideCharString,
								lenStr,
								static_cast< LPSTR >( ptrHGlob.GetMemPtr( ) ),
								ptrHGlob.MemSize( ),
								NULL,
								NULL );
}