/* $Id: GuestFileImpl.cpp 42818 2012-08-15 09:45:06Z vboxsync $ */
/** @file
 * VirtualBox Main - XXX.
 */

/*
 * Copyright (C) 2012 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 */


/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include "GuestFileImpl.h"
#include "GuestSessionImpl.h"
#include "GuestCtrlImplPrivate.h"

#include "Global.h"
#include "AutoCaller.h"

#include <VBox/com/array.h>


// constructor / destructor
/////////////////////////////////////////////////////////////////////////////

DEFINE_EMPTY_CTOR_DTOR(GuestFile)

HRESULT GuestFile::FinalConstruct()
{
    LogFlowThisFunc(("\n"));
    return BaseFinalConstruct();
}

void GuestFile::FinalRelease(void)
{
    LogFlowThisFuncEnter();
    uninit();
    BaseFinalRelease();
    LogFlowThisFuncLeave();
}

// public initializer/uninitializer for internal purposes only
/////////////////////////////////////////////////////////////////////////////

int GuestFile::init(GuestSession *pSession, const Utf8Str &strPath,
                    const Utf8Str &strOpenMode, const Utf8Str &strDisposition, uint32_t uCreationMode,
                    int64_t iOffset)
{
    /* Enclose the state transition NotReady->InInit->Ready. */
    AutoInitSpan autoInitSpan(this);
    AssertReturn(autoInitSpan.isOk(), E_FAIL);

    mData.mSession = pSession;
    mData.mCreationMode = uCreationMode;
    mData.mDisposition = getDispositionFromString(strDisposition);
    mData.mFileName = strPath;
    mData.mInitialSize = 0;
    mData.mOpenMode = getOpenModeFromString(strOpenMode);
    mData.mOffset = iOffset;

    /** @todo Validate parameters! */

    /* Confirm a successful initialization when it's the case. */
    autoInitSpan.setSucceeded();

    return VINF_SUCCESS;
}

/**
 * Uninitializes the instance.
 * Called from FinalRelease().
 */
void GuestFile::uninit(void)
{
    LogFlowThisFunc(("\n"));

    /* Enclose the state transition Ready->InUninit->NotReady. */
    AutoUninitSpan autoUninitSpan(this);
    if (autoUninitSpan.uninitDone())
        return;

    mData.mSession->fileClose(this);
}

// implementation of public getters/setters for attributes
/////////////////////////////////////////////////////////////////////////////

STDMETHODIMP GuestFile::COMGETTER(CreationMode)(ULONG *aCreationMode)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aCreationMode);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    *aCreationMode = mData.mCreationMode;

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::COMGETTER(Disposition)(ULONG *aDisposition)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aDisposition);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    *aDisposition = mData.mDisposition;

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::COMGETTER(FileName)(BSTR *aFileName)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aFileName);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    mData.mFileName.cloneTo(aFileName);

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::COMGETTER(InitialSize)(LONG64 *aInitialSize)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aInitialSize);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    *aInitialSize = mData.mInitialSize;

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::COMGETTER(Offset)(LONG64 *aOffset)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aOffset);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    *aOffset = mData.mOffset;

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::COMGETTER(OpenMode)(ULONG *aOpenMode)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    CheckComArgOutPointerValid(aOpenMode);

    AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);

    *aOpenMode = mData.mOpenMode;

    return S_OK;
#endif /* VBOX_WITH_GUEST_CONTROL */
}

// private methods
/////////////////////////////////////////////////////////////////////////////

/* static */
uint32_t GuestFile::getDispositionFromString(const Utf8Str &strDisposition)
{
    return 0; /** @todo Implement me! */
}

/* static */
uint32_t GuestFile::getOpenModeFromString(const Utf8Str &strOpenMode)
{
    return 0; /** @todo Implement me! */
}

// implementation of public methods
/////////////////////////////////////////////////////////////////////////////

STDMETHODIMP GuestFile::Close(void)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::QueryInfo(IFsObjInfo **aInfo)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::Read(ULONG aToRead, ULONG aTimeoutMS, ComSafeArrayOut(BYTE, aData))
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::ReadAt(LONG64 aOffset, ULONG aToRead, ULONG aTimeoutMS, ComSafeArrayOut(BYTE, aData))
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::Seek(LONG64 aOffset, FileSeekType_T aType)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::SetACL(IN_BSTR aACL)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::Write(ComSafeArrayIn(BYTE, aData), ULONG aTimeoutMS, ULONG *aWritten)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}

STDMETHODIMP GuestFile::WriteAt(LONG64 aOffset, ComSafeArrayIn(BYTE, aData), ULONG aTimeoutMS, ULONG *aWritten)
{
#ifndef VBOX_WITH_GUEST_CONTROL
    ReturnComNotImplemented();
#else
    AutoCaller autoCaller(this);
    if (FAILED(autoCaller.rc())) return autoCaller.rc();

    ReturnComNotImplemented();
#endif /* VBOX_WITH_GUEST_CONTROL */
}