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| -rw-r--r-- | include/unotools/streamwrap.hxx | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/include/unotools/streamwrap.hxx b/include/unotools/streamwrap.hxx new file mode 100644 index 0000000000..e6a105bd0e --- /dev/null +++ b/include/unotools/streamwrap.hxx @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * 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 http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_UNOTOOLS_STREAMWRAP_HXX +#define INCLUDED_UNOTOOLS_STREAMWRAP_HXX + +#include <unotools/unotoolsdllapi.h> +#include <com/sun/star/io/XOutputStream.hpp> +#include <com/sun/star/io/XInputStream.hpp> +#include <com/sun/star/io/XSeekable.hpp> +#include <com/sun/star/io/XTruncate.hpp> +#include <com/sun/star/io/XStream.hpp> +#include <comphelper/bytereader.hxx> +#include <cppuhelper/implbase.hxx> +#include <cppuhelper/implbase1.hxx> +#include <memory> +#include <mutex> + +class SvStream; + +namespace utl +{ + +// workaround for incremental linking bugs in MSVC2015 +class SAL_DLLPUBLIC_TEMPLATE OInputStreamWrapper_Base : public cppu::WeakImplHelper< css::io::XInputStream > {}; + +/// helper class for wrapping an SvStream into a com.sun.star.io::XInputStream +class UNOTOOLS_DLLPUBLIC OInputStreamWrapper : public OInputStreamWrapper_Base, public comphelper::ByteReader +{ +protected: + std::mutex m_aMutex; + SvStream* m_pSvStream; + bool m_bSvStreamOwner : 1; + OInputStreamWrapper() + { m_pSvStream = nullptr; m_bSvStreamOwner = false; } + void SetStream(SvStream* _pStream, bool bOwner ) + { m_pSvStream = _pStream; m_bSvStreamOwner = bOwner; } + +public: + OInputStreamWrapper(SvStream& _rStream); + OInputStreamWrapper(SvStream* pStream, bool bOwner=false); + OInputStreamWrapper(std::unique_ptr<SvStream> pStream); + virtual ~OInputStreamWrapper() override; + +// css::io::XInputStream + virtual sal_Int32 SAL_CALL readBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead) override; + virtual sal_Int32 SAL_CALL readSomeBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead) override; + virtual void SAL_CALL skipBytes(sal_Int32 nBytesToSkip) override; + virtual sal_Int32 SAL_CALL available() override; + virtual void SAL_CALL closeInput() override; + +// utl::ByteReader + virtual sal_Int32 readSomeBytes( sal_Int8* aData, sal_Int32 nMaxBytesToRead ) final override; + +protected: + /// throws a NotConnectedException if the object is not connected anymore + void checkConnected() const; + /// throws an exception according to the error flag of m_pSvStream + void checkError() const; +}; + +//= OSeekableInputStreamWrapper + +/** helper class for wrapping an SvStream into a com.sun.star.io::XInputStream + which is seekable (i.e. supports the com.sun.star.io::XSeekable interface). +*/ +class UNOTOOLS_DLLPUBLIC OSeekableInputStreamWrapper + : public cppu::ImplInheritanceHelper< OInputStreamWrapper, css::io::XSeekable > +{ +protected: + OSeekableInputStreamWrapper() {} + ~OSeekableInputStreamWrapper() override; + +public: + OSeekableInputStreamWrapper(SvStream& _rStream); + OSeekableInputStreamWrapper(SvStream* _pStream, bool _bOwner = false); + + // XSeekable + virtual void SAL_CALL seek( sal_Int64 _nLocation ) override; + virtual sal_Int64 SAL_CALL getPosition( ) override; + virtual sal_Int64 SAL_CALL getLength( ) override; +}; + +//= OOutputStreamWrapper + +class OOutputStreamWrapper : public cppu::WeakImplHelper<css::io::XOutputStream> +{ +public: + UNOTOOLS_DLLPUBLIC OOutputStreamWrapper(SvStream& _rStream); + +protected: + virtual ~OOutputStreamWrapper() override; + +// css::io::XOutputStream + virtual void SAL_CALL writeBytes(const css::uno::Sequence< sal_Int8 >& aData) override; + virtual void SAL_CALL flush() override; + virtual void SAL_CALL closeOutput() override; + + /// throws an exception according to the error flag of m_pSvStream + void checkError() const; + + // TODO: thread safety! + SvStream& rStream; +}; + +//= OSeekableOutputStreamWrapper + +typedef ::cppu::ImplHelper1 < css::io::XSeekable + > OSeekableOutputStreamWrapper_Base; +/** helper class for wrapping an SvStream into a com.sun.star.io::XOutputStream + which is seekable (i.e. supports the com.sun.star.io::XSeekable interface). +*/ +class UNOTOOLS_DLLPUBLIC OSeekableOutputStreamWrapper final + :public OOutputStreamWrapper + ,public OSeekableOutputStreamWrapper_Base +{ +public: + OSeekableOutputStreamWrapper(SvStream& _rStream); + +private: + virtual ~OSeekableOutputStreamWrapper() override; + + // disambiguate XInterface + virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& _rType ) override; + virtual void SAL_CALL acquire( ) noexcept override + { OOutputStreamWrapper::acquire(); } + virtual void SAL_CALL release( ) noexcept override + { OOutputStreamWrapper::release(); } + + // XSeekable + virtual void SAL_CALL seek( sal_Int64 _nLocation ) override; + virtual sal_Int64 SAL_CALL getPosition( ) override; + virtual sal_Int64 SAL_CALL getLength( ) override; +}; + +class UNOTOOLS_DLLPUBLIC OStreamWrapper final + : public cppu::ImplInheritanceHelper<OSeekableInputStreamWrapper, + css::io::XStream, + css::io::XOutputStream, + css::io::XTruncate> +{ + ~OStreamWrapper() override; + +public: + OStreamWrapper(SvStream& _rStream); + OStreamWrapper(std::unique_ptr<SvStream> _rStream); + OStreamWrapper(SvStream* _pStream, bool _bOwner = false); + +// css::io::XStream + virtual css::uno::Reference< css::io::XInputStream > SAL_CALL getInputStream( ) override; + virtual css::uno::Reference< css::io::XOutputStream > SAL_CALL getOutputStream( ) override; + +// css::io::XOutputStream + virtual void SAL_CALL writeBytes(const css::uno::Sequence< sal_Int8 >& aData) override; + virtual void SAL_CALL flush() override; + virtual void SAL_CALL closeOutput() override; + virtual void SAL_CALL truncate() override; +}; + +} +// namespace utl + +#endif // INCLUDED_UNOTOOLS_STREAMWRAP_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |