nestbuff.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:6k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- // include
- #include "hxtypes.h"
- #include "hxcom.h"
- #include "ihxpckts.h"
- // pnmisc
- #include "baseobj.h"
- // pxcomlib
- #include "nestbuff.h"
- // pndebug
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- CHXNestedBuffer::CHXNestedBuffer()
- {
- m_lRefCount = 0;
- m_pBuffer = NULL;
- m_ulOffset = 0;
- m_ulSize = 0;
- }
- CHXNestedBuffer::~CHXNestedBuffer()
- {
- HX_RELEASE(m_pBuffer);
- }
- STDMETHODIMP CHXNestedBuffer::QueryInterface(REFIID riid, void** ppvObj)
- {
- QInterfaceList qiList[] =
- {
- { GET_IIDHANDLE(IID_IUnknown), this },
- { GET_IIDHANDLE(IID_IHXBuffer), (IHXBuffer*) this },
- };
- return QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
- }
- STDMETHODIMP_(UINT32) CHXNestedBuffer::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- STDMETHODIMP_(UINT32) CHXNestedBuffer::Release()
- {
-
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- STDMETHODIMP CHXNestedBuffer::Get(REF(UCHAR*) pData, REF(ULONG32) ulLength)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (m_pBuffer)
- {
- pData = m_pBuffer->GetBuffer() + m_ulOffset;
- ulLength = m_ulSize;
- retVal = HXR_OK;
- }
- return retVal;
- }
- STDMETHODIMP CHXNestedBuffer::Set(const UCHAR* pData, ULONG32 ulLength)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (m_pBuffer && pData && ulLength &&
- m_ulOffset + ulLength <= m_pBuffer->GetSize())
- {
- // Copy the data
- memcpy(m_pBuffer->GetBuffer() + m_ulOffset, /* Flawfinder: ignore */
- pData,
- ulLength);
- // Set the size
- m_ulSize = ulLength;
- // Clear the return value
- retVal = HXR_OK;
- }
- return retVal;
- }
- STDMETHODIMP CHXNestedBuffer::SetSize(ULONG32 ulLength)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (m_pBuffer && ulLength &&
- m_ulOffset + ulLength <= m_pBuffer->GetSize())
- {
- m_ulSize = ulLength;
- retVal = HXR_OK;
- }
- return retVal;
- }
- STDMETHODIMP_(ULONG32) CHXNestedBuffer::GetSize()
- {
- return m_ulSize;
- }
- STDMETHODIMP_(UCHAR*) CHXNestedBuffer::GetBuffer()
- {
- UCHAR* pRet = NULL;
- if (m_pBuffer)
- {
- pRet = m_pBuffer->GetBuffer() + m_ulOffset;
- }
- return pRet;
- }
- STDMETHODIMP CHXNestedBuffer::Init(IHXBuffer* pBuffer, UINT32 ulOffset, UINT32 ulSize)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (pBuffer && ulSize)
- {
- if (ulOffset + ulSize <= pBuffer->GetSize())
- {
- // Init the members
- HX_RELEASE(m_pBuffer);
- m_pBuffer = pBuffer;
- m_pBuffer->AddRef();
- m_ulOffset = ulOffset;
- m_ulSize = ulSize;
- // Clear the return value
- retVal = HXR_OK;
- }
- }
- return retVal;
- }
- HX_RESULT CHXNestedBuffer::CreateObject(CHXNestedBuffer** ppObj)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (ppObj)
- {
- CHXNestedBuffer* pObj = new CHXNestedBuffer();
- if (pObj)
- {
- *ppObj = pObj;
- retVal = HXR_OK;
- }
- }
- return retVal;
- }
- HX_RESULT CHXNestedBuffer::CreateNestedBuffer(IHXBuffer* pBuffer, UINT32 ulOffset,
- UINT32 ulSize, REF(IHXBuffer*) rpNestedBuffer)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (pBuffer && ulSize && ulOffset + ulSize <= pBuffer->GetSize())
- {
- CHXNestedBuffer* pNest = new CHXNestedBuffer();
- if (pNest)
- {
- // AddRef the object
- pNest->AddRef();
- // Init the object
- retVal = pNest->Init(pBuffer, ulOffset, ulSize);
- if (SUCCEEDED(retVal))
- {
- HX_RELEASE(rpNestedBuffer);
- retVal = pNest->QueryInterface(IID_IHXBuffer, (void**) &rpNestedBuffer);
- }
- }
- HX_RELEASE(pNest);
- }
- return retVal;
- }