diff options
Diffstat (limited to 'sc/source/filter/xml/xmlexprt.cxx')
| -rw-r--r-- | sc/source/filter/xml/xmlexprt.cxx | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/sc/source/filter/xml/xmlexprt.cxx b/sc/source/filter/xml/xmlexprt.cxx index 94613379a32d..c2fd53acb736 100644 --- a/sc/source/filter/xml/xmlexprt.cxx +++ b/sc/source/filter/xml/xmlexprt.cxx @@ -1575,6 +1575,26 @@ static bool lcl_CopyStreamElement( const uno::Reference< io::XInputStream >& xIn return true; // successful } +static void lcl_SkipBytesInBlocks( const uno::Reference< io::XInputStream >& xInput, sal_Int32 nBytesToSkip ) +{ + // skipBytes in zip stream is implemented as reading. + // For now, split into several calls to avoid allocating a large buffer. + // Later, skipBytes should be changed. + + const sal_Int32 nMaxSize = 32*1024; + + if ( nBytesToSkip > 0 ) + { + sal_Int32 nRemaining = nBytesToSkip; + while ( nRemaining > 0 ) + { + sal_Int32 nSkip = std::min( nRemaining, nMaxSize ); + xInput->skipBytes( nSkip ); + nRemaining -= nSkip; + } + } +} + void ScXMLExport::CopySourceStream( sal_Int32 nStartOffset, sal_Int32 nEndOffset, sal_Int32& rNewStart, sal_Int32& rNewEnd ) { uno::Reference<xml::sax::XDocumentHandler> xHandler = GetDocHandler(); @@ -1598,7 +1618,7 @@ void ScXMLExport::CopySourceStream( sal_Int32 nStartOffset, sal_Int32 nEndOffset rNewStart = (sal_Int32)xDestSeek->getPosition(); if ( nStartOffset > nSourceStreamPos ) - xSourceStream->skipBytes( nStartOffset - nSourceStreamPos ); + lcl_SkipBytesInBlocks( xSourceStream, nStartOffset - nSourceStreamPos ); if ( !lcl_CopyStreamElement( xSourceStream, xDestStream, nEndOffset - nStartOffset ) ) { |