streamwrap.hxx

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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#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 <com/sun/star/lang/XUnoTunnel.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 > {};
 
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:
    void checkConnected() const;
    void checkError() const;
};
 
//= OSeekableInputStreamWrapper
 
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;
 
    void checkError() const;
 
    // TODO: thread safety!
    SvStream&       rStream;
};
 
//= OSeekableOutputStreamWrapper
 
typedef ::cppu::ImplHelper1 <   css::io::XSeekable
                            >   OSeekableOutputStreamWrapper_Base;
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
 
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