hxxmlprs.cpp

linux下的一款播放器

				strlen(pAttr->value)+1);
			    pValues->SetPropertyCString(
				pAttr->name, pBuf);
			    pBuf->Release();
			}
		    }
		    rc = m_pResponse->HandleStartElement(pName, pValues,
                                                         m_pParser->GetTagStartLineNumber(),
                                                         m_pParser->GetTagStartColumnNumber());
		    HX_RELEASE(pValues);

		    if(!pTag->m_need_close && SUCCEEDED(rc))
		    {
			rc = m_pResponse->HandleEndElement(pName,0,0);
		    }
		}
		else
		{
		    rc = m_pResponse->HandleEndElement(pName,0,0);
		}
	    }
	    break;

	    default:
	    {
		bDone = TRUE;
	    }
	    break;
	}
    }

exit:
    HX_DELETE(pTag);

    return rc;
}


/* 
 * HXStrictXMLParser methods
 */

HXStrictXMLParser::HXStrictXMLParser():
    m_pParser(NULL),
    m_pByteQueue(NULL)
    , m_pErrorNotifier(NULL)
{
}

HXStrictXMLParser::~HXStrictXMLParser()
{
    HX_DELETE(m_pParser);
    HX_DELETE(m_pByteQueue);
}

HX_RESULT
HXStrictXMLParser::Init(IHXXMLParserResponse* pResponse,
		       const char* pEncoding)
{
    m_pResponse = pResponse;

    m_pResponse = pResponse;
    m_pParser = new XMLParser(TRUE, pEncoding);
    if (m_pErrorNotifier)
    {
	m_pParser->StoreErrors();
    }
    m_pByteQueue = new CBigByteQueue(BUFSIZE);

    return HXR_OK;
}

HX_RESULT
HXStrictXMLParser::InitErrorNotifier(ErrorNotifier* /*OUT*/ pNotifier)
{
    m_pErrorNotifier = pNotifier; 
    if (m_pParser)
    {
	m_pParser->StoreErrors();
    }
    return HXR_OK; 
}

HX_RESULT
HXStrictXMLParser::Parse(IHXBuffer* pBuffer,
			BOOL bIsFinal)
{
    HX_RESULT rc = HXR_OK;

    // See if we have any encoding info
    CheckEncoding(m_pParser, pBuffer);

    UINT32 ulBufLen = pBuffer->GetSize();
    if(m_pByteQueue->GetAvailableElements() < ulBufLen)
    {
	m_pByteQueue->Grow(ulBufLen);
    }
    m_pByteQueue->EnQueue(pBuffer->GetBuffer(), ulBufLen);
    rc = DoParse(bIsFinal);

    return rc;
}

HX_RESULT
HXStrictXMLParser::HandleErrors(CHXPtrArray* pErrs)
{
    if (m_pErrorNotifier && pErrs)
    {
	int size = pErrs->GetSize();

	for(int i=0;i<size;++i)
	{
	    XMLError* pError = (XMLError*) (*pErrs)[i];
	    HX_RESULT code = ConvertToHX_RESULT(pError->m_errorTag);
	    m_pErrorNotifier->ErrorInLastTag(code, pError->m_pErrorString, 
		pError->m_pFrameString,  pError->m_lLineNumber, 
		pError->m_lLinePosition);
	}
    }
    return HXR_OK;
}

HX_RESULT
HXStrictXMLParser::ConvertToHX_RESULT(UINT32 err)
{
    HX_RESULT ret = HXR_OK;
    switch (err)
    {
    case XMLUnknownError:
	ret = HXR_XML_GENERALERROR;
	break;
    case XMLErrorNoClose:
	ret = HXR_XML_NOCLOSE;
	break;
    case XMLErrorBadAttribute:
	ret = HXR_XML_BADATTRIBUTE;
	break;
    case XMLErrorNoValue:
	ret = HXR_XML_NOVALUE;
	break;
    case XMLErrorMissingQuote:
	ret = HXR_XML_MISSINGQUOTE;
	break;
    case XMLErrorBadEndTag:
	ret = HXR_XML_BADENDTAG;
	break;
    case XMLErrorNoTagType:
	ret = HXR_XML_NOTAGTYPE;
	break;
    case XMLErrorDupAttribute:
	ret = HXR_XML_DUPATTRIBUTE;
	break;
    case XMLErrorCommentBeforeProcInst:
	ret = HXR_XML_COMMENT_B4_PROCINST;
	break;
    case XMLErrorInvalidName:
	ret = HXR_XML_INVALID_NAME;
	break;
    case XMLErrorInvalidCharInDoc:
	ret = HXR_XML_INVALID_CHAR_IN_DOC;
	break;
    case XMLErrorTwoDashNotAllowed:
	ret = HXR_XML_TWO_DASHES_NOT_ALLOWED_IN_COMMENT;
	break;
    case XMLErrorInvalidDecl:
	ret = HXR_XML_INVALID_DECL;
	break;
    case XMLErrorInvalidPI:
	ret = HXR_XML_INVALID_PI;
	break;
    case XMLErrorInvalidPITarget:
	ret = HXR_XML_INVALID_PI_TARGET;
	break;
    case XMLErrorInvalidCDATA:
	ret = HXR_XML_INVALID_CDATA;
	break;
    case XMLErrorInvalidRef:
	ret = HXR_XML_INVALID_REF;
	break;
    case XMLErrorMissingEquals:
	ret = HXR_XML_MISSING_EQUALS;
	break;
    case XMLErrorMissingReqSpace:
	ret = HXR_XML_MISSING_REQ_SPACE;
	break;
    case XMLErrorLTnotAllowed:
	ret = HXR_XML_LT_NOT_ALLOWED;
	break;
    case XMLErrorInvalidGTafter2RSQB:
	ret = HXR_XML_INVALID_GT_AFFT_2_RSQB_IN_CONTENT;
	break;
    case XMLErrorInvalidComment:
	ret = HXR_XML_INVALID_COMMENT;
	break;
    }
    return ret;
}


HX_RESULT
HXStrictXMLParser::DoParse(BOOL bIsFinal)
{
    HX_RESULT rc = HXR_OK;

    XMLTag* pTag = NULL;

    BOOL bDone = FALSE;
    while(!bDone &&
	HXR_OK == rc)
    {
	UINT32 bytesUsed;
	UINT32 bytesAvail = m_pByteQueue->GetQueuedItemCount();
	if(bytesAvail <= 0)
	{
	    break;
	}

	BYTE* pBuf = new BYTE[bytesAvail];
	BYTE* p = pBuf;
	m_pByteQueue->DeQueue(pBuf, bytesAvail);
	bytesUsed = bytesAvail;

	if(pTag)
	{
	    delete pTag;
	    pTag = 0;
	}

	XMLParseResult pResult = 
	    m_pParser->Parse((const char*&)p, bytesAvail, pTag, bIsFinal);
	m_pByteQueue->EnQueue(p, (UINT32)(bytesAvail - (p - pBuf)));

	// pBuf is not used anymore, so delete
	HX_VECTOR_DELETE(pBuf);
	p = NULL;

	UINT32 ulTagStartLine = m_pParser->GetTagStartLineNumber();
	UINT32 ulTagStartCol = m_pParser->GetTagStartColumnNumber();

	switch(pResult)
	{
	    case XMLPNotDone:
	    {
		goto exit;
	    }

	    case XMLPNoClose:
	    {
		rc = HXR_XML_NOCLOSE;
		goto exit;
	    }

	    case XMLPBadAttribute:
	    {
		rc = HXR_XML_NOTAGTYPE;
		goto exit;
	    }

	    case XMLPBadEndTag:
	    {
		rc = HXR_XML_BADENDTAG;
		goto exit;
	    }
	    
	    case XMLPAttributeValueNotQuoted:
	    {
		rc = HXR_XML_MISSINGQUOTE;
		goto exit;
	    }

	    case XMLPBadDirective:
	    {
		rc = HXR_XML_GENERALERROR;
		goto exit;
	    }

	    case XMLPDupAttribute:
	    {
		rc = HXR_XML_DUPATTRIBUTE;
		goto exit;
	    }

	    case XMLPCommentBeforeProcInst:
	    {
		rc = HXR_XML_COMMENT_B4_PROCINST;
		goto exit;
	    }
	    
	    case XMLPComment:
	    {
		const char* pValue = pTag->m_cur_attribute->value;
		rc = m_pResponse->HandleComment(pValue,ulTagStartLine,ulTagStartCol);
		HandleErrors(pTag->m_errs);
	    }
	    break;

	    case XMLPPlainText:
	    {
		const char* pValue = pTag->m_cur_attribute->value;
		CHXBuffer* pBuffer = new CHXBuffer;
		pBuffer->AddRef();
		pBuffer->Set((const BYTE*)pValue, strlen(pValue)+1);
		rc = m_pResponse->HandleCharacterData(pBuffer,ulTagStartLine,ulTagStartCol);
		HandleErrors(pTag->m_errs);
		HX_RELEASE(pBuffer);
	    }
	    break;

	    case XMLPDirective:
	    {
		const char* pName = NULL;
		const char* pPublicID = NULL;
		const char* pSystemID = NULL;
		CHXBuffer* pBuffer = NULL;
		UINT32 ulNumAttributes = pTag->m_numAttributes; 
		if(strcmp(pTag->m_name, "DOCTYPE") == 0 &&
		    ulNumAttributes > 0)
		{
		    UINT32 ulCurAttribute = 0;

		    while(ulCurAttribute < ulNumAttributes)
		    {
			XMLAttribute* pAttr = NULL;
			if(ulCurAttribute == 0)
			{
			    pAttr = pTag->attribute(ulCurAttribute);
			    if(pAttr)
			    {
				pName = pAttr->value;
			    }
			}
			else
			{
			    pAttr = pTag->attribute(ulCurAttribute);
			    if(strcmp(pAttr->value, "SYSTEM") == 0)
			    {
				ulCurAttribute++;
				if(ulCurAttribute < ulNumAttributes)
				{
				    pAttr = pTag->attribute(ulCurAttribute);
				    if(pAttr)
				    {
					pSystemID = pAttr->value;
				    }
				}
			    }
			    else if(strcmp(pAttr->value, "PUBLIC") == 0)
			    {
				ulCurAttribute++;
				if(ulCurAttribute < ulNumAttributes)
				{
				    pAttr = pTag->attribute(ulCurAttribute);
				    if(pAttr)
				    {
					pPublicID = pAttr->value;
					ulCurAttribute++;
					if(ulCurAttribute < ulNumAttributes)
					{
					    pAttr = pTag->attribute(ulCurAttribute);
					    if(pAttr)
					    {
						pSystemID = pAttr->value;
					    }
					}
				    }
				}
			    }
			}
			ulCurAttribute++;
		    }

		    rc = m_pResponse->HandleUnparsedDoctypeDecl(pName, pSystemID,
						pPublicID, ulTagStartLine,ulTagStartCol);
		    HX_RELEASE(pBuffer);
		}
	    }
	    break;

	    case XMLPProcInst:
	    // handle processing instruction
	    {
		const char* pTarget = pTag->m_name;

		CHXHeader* pValues = new CHXHeader;
		pValues->AddRef();
		pValues->PreserveCase(TRUE);

		for(UINT32 i=0;i<pTag->m_numAttributes;++i)
		{
		    XMLAttribute* pAttr = pTag->attribute(i);
		    // the XMLParser class supports what it calls attributes
		    // without names.  It's used to communicate processing
		    // instructions and things like that. We just ignore attributes
		    // without names here.
		    if (pAttr->name != NULL)
		    {
			CHXBuffer* pBuf = new CHXBuffer;
			pBuf->AddRef();
			pBuf->Set((const BYTE*)pAttr->value,
			    strlen(pAttr->value)+1);
			pValues->SetPropertyCString(
			    pAttr->name, pBuf);
			pBuf->Release();
		    }
		}
		rc = m_pResponse->HandleProcessingInstruction(pTarget,
							      pValues,ulTagStartLine,ulTagStartCol);

		HandleErrors(pTag->m_errs);

		HX_RELEASE(pValues);
	    }
	    break;

	    case XMLPTag:
	    {
		const char* pName = pTag->m_name;
		if(pTag->m_type != XMLEndTag)
		{
		    CHXHeader* pValues = new CHXHeader;
		    pValues->AddRef();
		    pValues->PreserveCase(TRUE);

		    for(UINT32 i=0;i<pTag->m_numAttributes;++i)
		    {
			XMLAttribute* pAttr = pTag->attribute(i);
			// the XMLParser class supports what it calls attributes
			// without names.  It's used to communicate processing
			// instructions and things like that. We just ignore attributes
			// without names here.
			if (pAttr->name != NULL)
			{
			    CHXBuffer* pBuf = new CHXBuffer;
			    pBuf->AddRef();
			    pBuf->Set((const BYTE*)pAttr->value,
				strlen(pAttr->value)+1);
			    pValues->SetPropertyCString(
				pAttr->name, pBuf);
			    pBuf->Release();
			}
		    }
		    if(HXR_OK == rc)
		    {
			rc = m_pResponse->HandleStartElement(pName, 
			    pValues,ulTagStartLine,ulTagStartCol);

			HandleErrors(pTag->m_errs);
		    }
		    HX_RELEASE(pValues);

		    if(HXR_OK == rc &&
			!pTag->m_need_close)
		    {
			rc = m_pResponse->HandleEndElement(pName,ulTagStartLine,ulTagStartCol);
		    }
		}
		else
		{
		    rc = m_pResponse->HandleEndElement(pName,ulTagStartLine,ulTagStartCol);
		    HandleErrors(pTag->m_errs);
		}
	    }
	    break;

	    default:
	    {
		bDone = TRUE;
	    }
	    break;
	}
    }

exit:
    HX_DELETE(pTag);

    return rc;
}

HX_RESULT
HXStrictXMLParser::GetCurrentLineNumber(REF(ULONG32) ulLineNumber)
{
    HX_RESULT rc = HXR_OK;

    ulLineNumber = (UINT32)m_pParser->GetCurrentLineNumber();

    return rc;
}

HX_RESULT
HXStrictXMLParser::GetCurrentColumnNumber(REF(ULONG32) ulColumnNumber)
{
    HX_RESULT rc = HXR_OK;

    ulColumnNumber = (UINT32)m_pParser->GetCurrentColumnNumber();

    return rc;
}

HX_RESULT
HXStrictXMLParser::GetCurrentByteIndex(REF(ULONG32) ulByteIndex)
{
    HX_RESULT rc = HXR_NOTIMPL;

    return rc;
}

HX_RESULT
HXStrictXMLParser::GetCurrentErrorText(REF(IHXBuffer*) pBuffer)
{
    HX_RESULT rc = HXR_FAIL;

    XMLError* pLastError = m_pParser->GetLastError();
    if(pLastError &&
	pLastError->m_pErrorString)
    {
	pBuffer = new CHXBuffer;
	pBuffer->AddRef();
	pBuffer->Set((BYTE*)pLastError->m_pErrorString,
			 strlen(pLastError->m_pErrorString) + 1);
	rc = HXR_OK;
    }

    return rc;
}