packedvalues.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:7k
- /* ***** 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 "hxtypes.h"
- #include "hxcom.h"
- #include "hxresult.h"
- #include "hxstrutl.h"
- #include "hxstring.h"
- #include "hxbuffer.h"
- #include "hxccf.h"
- #include "hxassert.h"
- #include "packedvalues.h"
- inline UINT32
- PackedValues::size(IHXValues* pValues)
- {
- if (!pValues)
- {
- return 0;
- }
- const char* pPropName;
- ULONG32 uPropValue;
- IHXBuffer* pBuffer;
- HX_RESULT retVal;
- UINT32 ulSize = sizeof(PackedValuesHeader) + 4; //header, nitems
- //ULONG32
- retVal = pValues->GetFirstPropertyULONG32(pPropName, uPropValue);
- while (retVal == HXR_OK)
- {
- ulSize += 1 + 1 + (strlen(pPropName)+1) + 2 + 4;
- retVal = pValues->GetNextPropertyULONG32(pPropName, uPropValue);
- }
- //CString
- retVal = pValues->GetFirstPropertyCString(pPropName, pBuffer);
- while (retVal == HXR_OK)
- {
- ulSize += 1 + 1 + (strlen(pPropName)+1) + 2 + pBuffer->GetSize();
- pBuffer->Release();
- retVal = pValues->GetNextPropertyCString(pPropName, pBuffer);
- }
- //Buffer
- retVal = pValues->GetFirstPropertyBuffer(pPropName, pBuffer);
- while (retVal == HXR_OK)
- {
- ulSize += 1 + 1 + (strlen(pPropName)+1) + 2 + pBuffer->GetSize();
- pBuffer->Release();
- retVal = pValues->GetNextPropertyBuffer(pPropName, pBuffer);
- }
- return ulSize;
- }
- UINT32 PackedValues::packone(UINT8* buf, UINT8 type, UINT8 name_length, UINT8* name, UINT16 value_length, UINT8* value_data)
- {
- UINT8* off = buf;
- *off++ = type;
- *off++ = name_length;
- {memcpy(off, name, name_length); off += name_length; }
- {*off++ = (UINT8) (value_length>>8); *off++ = (UINT8) (value_length);}
- {memcpy(off, value_data, value_length); off += value_length; }
- return off-buf;
- }
- HX_RESULT PackedValues::pack(UINT8* buf, UINT32 &len, IHXValues* pValues, UINT8 fourCC[4])
- {
- HX_ASSERT(len >= size(pValues));
- if (!pValues)
- {
- len = 0;
- return HXR_FAIL;
- }
- PackedValuesHeader* pHeader = (PackedValuesHeader*)buf;
- memcpy(pHeader->fourCC, fourCC, 4);
- buf += sizeof(PackedValuesHeader);
- UINT8* off = buf + 4; //header, nitems
- const char* pPropName;
- ULONG32 uPropValue;
- IHXBuffer* pBuffer;
- HX_RESULT retVal;
- UINT32 uTotal = 0;
- //pack ULONG32
- retVal = pValues->GetFirstPropertyULONG32(pPropName, uPropValue);
- while (retVal == HXR_OK)
- {
- uTotal++;
- UINT8 pULONGBuffer[4];
- pULONGBuffer[0] = (UINT8)(uPropValue >> 24);pULONGBuffer[1] = (UINT8)(uPropValue >> 16);
- pULONGBuffer[2] = (UINT8)(uPropValue >> 8); pULONGBuffer[3] = (UINT8)(uPropValue);
- off += packone(off, PROP_TYPE_ULONG32, strlen(pPropName)+1, (UINT8*)pPropName, 4, pULONGBuffer);
- retVal = pValues->GetNextPropertyULONG32(pPropName, uPropValue);
- }
- //pack CString
- retVal = pValues->GetFirstPropertyCString(pPropName, pBuffer);
- while (retVal == HXR_OK)
- {
- uTotal++;
- off += packone(off, PROP_TYPE_CSTRING, strlen(pPropName)+1, (UINT8*)pPropName, (UINT16)(pBuffer->GetSize()), pBuffer->GetBuffer());
- pBuffer->Release();
- retVal = pValues->GetNextPropertyCString(pPropName, pBuffer);
- }
- //pack Buffer
- retVal = pValues->GetFirstPropertyBuffer(pPropName, pBuffer);
- while (retVal == HXR_OK)
- {
- uTotal++;
- off += packone(off, PROP_TYPE_BUFFER, strlen(pPropName)+1, (UINT8*)pPropName, (UINT16)(pBuffer->GetSize()), pBuffer->GetBuffer());
- pBuffer->Release();
- retVal = pValues->GetNextPropertyBuffer(pPropName, pBuffer);
- }
- //the total number of items
- buf[0] = (UINT8)(uTotal >> 24); buf[1] = (UINT8)(uTotal >> 16);
- buf[2] = (UINT8)(uTotal >> 8 ); buf[3] = (UINT8)(uTotal);
- //header
- UINT32 datasize = off - buf;
- pHeader->size = datasize;
- pHeader->pack();
- len = off - buf + sizeof(PackedValuesHeader);
- return HXR_OK;
- }
- HX_RESULT PackedValues::unpack(UINT8* buf, UINT32 len, IHXValues* pValues, IHXCommonClassFactory* pCCF)
- {
- HX_ASSERT(buf && len > 0); HX_ASSERT(pValues);
- PackedValuesHeader* pHeader = (PackedValuesHeader*)buf;
- memcpy(m_fourCC, pHeader->fourCC, 4);
-
- buf += sizeof(PackedValuesHeader);
- UINT8 type;
- UINT8 name_length;
- UINT8* name;
- UINT16 value_length;
- UINT8* value_data;
- UINT8* off = buf + 4; //nitems
- UINT32 uTotal = (buf[0]<<24) + (buf[1]<<16) + (buf[2]<<8) + buf[3];
- HX_RESULT retVal = HXR_OK;
- for (UINT32 i=0; i < uTotal && retVal == HXR_OK; i++)
- {
- type = *off++;
- name_length = *off++;
- name = off; off += name_length;
- value_length = (off[0] << 8) + off[1]; off+=2;
- value_data = off; off += value_length;
- IHXBuffer* pBuffer = NULL;
- switch(type)
- {
- case PROP_TYPE_ULONG32:
- pValues->SetPropertyULONG32((char*)name, (value_data[0]<<24) + (value_data[1]<<16)
- + (value_data[2]<<8) + value_data[3]);
- break;
- case PROP_TYPE_CSTRING:
- if (pCCF)
- {
- retVal = pCCF->CreateInstance(CLSID_IHXBuffer, (void**)&pBuffer);
- if (retVal == HXR_OK)
- {
- pBuffer->Set(value_data, value_length);
- pValues->SetPropertyCString((char*)name, pBuffer);
- pBuffer->Release();
- }
- }
- break;
- case PROP_TYPE_BUFFER:
- if (pCCF)
- {
- retVal = pCCF->CreateInstance(CLSID_IHXBuffer, (void**)&pBuffer);
- if (retVal == HXR_OK)
- {
- pBuffer->Set(value_data, value_length);
- pValues->SetPropertyCString((char*)name, pBuffer);
- pBuffer->Release();
- }
- }
- break;
- }
- }
-
- return retVal;
- }