00850e3fa7
There seems to be some confusion here. available() is actually the number of bytes that can be read without blocking, but most implementations seems to be just returning the number of bytes remaining in the stream. Since we're doing that, let's do it properly. (*) some of them were just casting, instead of clamping, which will return wrong values sometimes. (*) FileStreamWrapper_Impl/OInputStreamWrapper/OTempFileService were doing unnecessary work, instead of just asking the underlying SvStream for it's remaining size Change-Id: I3ef26e0363e989ed3e00be0fdb993e1cdeb7819f Reviewed-on: https://gerrit.libreoffice.org/57264 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <ucbhelper/fd_inputstream.hxx>
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#include <com/sun/star/io/IOException.hpp>
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#include <rtl/alloc.h>
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#include <osl/diagnose.h>
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#include <sal/log.hxx>
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#include <algorithm>
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using namespace com::sun::star::uno;
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using namespace com::sun::star::lang;
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using namespace com::sun::star::io;
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namespace ucbhelper
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{
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FdInputStream::FdInputStream( oslFileHandle tmpfl )
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: m_tmpfl(tmpfl)
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, m_nLength( 0 )
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{
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if ( !m_tmpfl )
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osl_createTempFile( nullptr, &m_tmpfl, nullptr );
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OSL_ENSURE( m_tmpfl, "input stream without tempfile!" );
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if ( osl_setFilePos( m_tmpfl, osl_Pos_End, 0 ) == osl_File_E_None )
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{
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sal_uInt64 nFileSize = 0;
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if ( osl_getFilePos( m_tmpfl, &nFileSize ) == osl_File_E_None )
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m_nLength = nFileSize;
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oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Absolut, 0 );
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SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
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}
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}
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FdInputStream::~FdInputStream()
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{
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if ( nullptr != m_tmpfl)
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osl_closeFile(m_tmpfl);
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}
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sal_Int32 SAL_CALL FdInputStream::readBytes(Sequence< sal_Int8 >& aData,
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sal_Int32 nBytesToRead)
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{
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osl::MutexGuard aGuard(m_aMutex);
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sal_uInt64 nBeforePos( 0 );
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sal_uInt64 nBytesRequested( nBytesToRead );
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sal_uInt64 nBytesRead( 0 );
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osl_getFilePos( m_tmpfl, &nBeforePos );
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if ( 0 == ( nBytesRequested = std::min< sal_uInt64 >( m_nLength - nBeforePos, nBytesRequested ) ) )
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return 0;
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if ( 0 <= nBytesToRead && aData.getLength() < nBytesToRead )
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aData.realloc( nBytesToRead );
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if ( osl_readFile( m_tmpfl, aData.getArray(), nBytesRequested, &nBytesRead ) != osl_File_E_None )
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throw IOException();
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return sal_Int32( nBytesRead );
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}
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sal_Int32 SAL_CALL FdInputStream::readSomeBytes( Sequence< sal_Int8 >& aData,
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sal_Int32 nMaxBytesToRead )
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{
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return readBytes(aData,nMaxBytesToRead);
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}
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void SAL_CALL FdInputStream::skipBytes(sal_Int32 nBytesToSkip)
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{
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osl::MutexGuard aGuard(m_aMutex);
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if(!m_tmpfl)
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throw IOException();
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oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Current, nBytesToSkip );
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SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
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}
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sal_Int32 SAL_CALL FdInputStream::available()
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{
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return std::min<sal_Int64>(SAL_MAX_INT32, m_nLength - getPosition());
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}
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void SAL_CALL FdInputStream::closeInput()
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{
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osl::MutexGuard aGuard(m_aMutex);
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if(m_tmpfl)
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{
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osl_closeFile(m_tmpfl);
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m_tmpfl = nullptr;
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}
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}
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void SAL_CALL FdInputStream::seek(sal_Int64 location)
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{
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osl::MutexGuard aGuard(m_aMutex);
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if(!m_tmpfl)
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throw IOException();
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oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Absolut, location );
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SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
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}
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sal_Int64 SAL_CALL
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FdInputStream::getPosition()
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{
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osl::MutexGuard aGuard(m_aMutex);
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if(!m_tmpfl)
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throw IOException();
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sal_uInt64 nFilePos = 0;
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osl_getFilePos( m_tmpfl, &nFilePos );
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return nFilePos;
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}
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sal_Int64 SAL_CALL FdInputStream::getLength()
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{
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return m_nLength;
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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