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/*************************************************************************
*
* 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.
*
************************************************************************/
#include "oox/helper/textinputstream.hxx"
#include <rtl/strbuf.hxx>
#include <rtl/ustrbuf.hxx>
#include "oox/helper/binaryinputstream.hxx"
using ::rtl::OStringBuffer;
using ::rtl::OStringToOUString;
using ::rtl::OUString;
using ::rtl::OUStringBuffer;
namespace oox {
// ============================================================================
namespace {
/** Reads a text line from stream. First, tries to skip the second character of
a two-character line end sequence. Returns the new line-end character. */
template< typename BufferType, typename CharType, typename StreamDataType >
sal_Unicode lclReadLine( BufferType& orBuffer, BinaryInputStream& rInStrm, sal_Unicode cLastEolChar )
{
// try to skip LF following CR, or CR following LF
if( !rInStrm.isEof() && (cLastEolChar != 0) )
{
CharType cChar = static_cast< CharType >( rInStrm.readValue< StreamDataType >() );
// return on EOF after line-end
if( rInStrm.isEof() )
return 0;
// return on sequence of equal line-end characters
bool bIsEolChar = (cChar == 10) || (cChar == 13);
if( bIsEolChar && (cChar == cLastEolChar) )
return cChar;
// append the character, if it is not the other line-end charcter
if( !bIsEolChar )
orBuffer.append( cChar );
}
// read chars until EOF or line end character (LF or CR)
while( true )
{
CharType cChar = static_cast< CharType >( rInStrm.readValue< StreamDataType >() );
if( rInStrm.isEof() )
return 0;
if( (cChar == 10) || (cChar == 13) )
return cChar;
orBuffer.append( cChar );
}
}
} // namespace
// ============================================================================
TextInputStream::TextInputStream( BinaryInputStream& rInStrm, rtl_TextEncoding eTextEnc ) :
mrInStrm( rInStrm ),
meTextEnc( eTextEnc ),
mcLastEolChar( 0 )
{
}
bool TextInputStream::isEof() const
{
// do not return EOF, if last text line missed line-end character (see below)
return mrInStrm.isEof() && (mcLastEolChar == 0);
}
OUString TextInputStream::readLine()
{
if( mrInStrm.isEof() )
{
mcLastEolChar = 0;
return OUString();
}
OUString aLine;
if( meTextEnc == RTL_TEXTENCODING_UCS2 )
{
// read 16-bit characters for UCS2 encoding
OUStringBuffer aBuffer;
mcLastEolChar = lclReadLine< OUStringBuffer, sal_Unicode, sal_uInt16 >( aBuffer, mrInStrm, mcLastEolChar );
aLine = aBuffer.makeStringAndClear();
}
else
{
// otherwise, read 8-bit characters and convert according to text encoding
OStringBuffer aBuffer;
mcLastEolChar = lclReadLine< OStringBuffer, sal_Char, sal_uInt8 >( aBuffer, mrInStrm, mcLastEolChar );
aLine = OStringToOUString( aBuffer.makeStringAndClear(), meTextEnc );
}
// if last line is not empty but line-end character is missing, do not return EOF
if( mrInStrm.isEof() && (aLine.getLength() > 0) )
mcLastEolChar = 10;
return aLine;
}
// ============================================================================
} // namespace oox
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