expatprs.cpp

linux下的一款播放器

		return HXR_XML_INVALID_COMMENT;
	    default:
		return HXR_XML_GENERALERROR;
	    }
	}
    }
    else
    {
	return HXR_NOT_INITIALIZED;
    }
    return HXR_OK;
}

STDMETHODIMP
HXExpatXMLParser::GetCurrentLineNumber(REF(ULONG32) /*OUT*/ ulLineNumber)
{
    if ( m_pParser )
    {
	ulLineNumber = XML_GetCurrentLineNumber(m_pParser);
	return HXR_OK;
    }
    else
    {
	return HXR_NOT_INITIALIZED;
    }
}

STDMETHODIMP
HXExpatXMLParser::GetCurrentColumnNumber(REF(ULONG32) /*OUT*/ ulColumnNumber)
{
    if ( m_pParser )
    {
	ulColumnNumber = XML_GetCurrentLineNumber(m_pParser);
	return HXR_OK;
    }
    else
    {
	return HXR_NOT_INITIALIZED;
    }
}

STDMETHODIMP
HXExpatXMLParser::GetCurrentByteIndex(REF(ULONG32) /*OUT*/ ulByteIndex)
{
    if ( m_pParser )
    {
	ulByteIndex = XML_GetCurrentByteIndex(m_pParser);
	return HXR_OK;
    }
    else
    {
	return HXR_NOT_INITIALIZED;
    }
}


STDMETHODIMP
HXExpatXMLParser::GetCurrentErrorText(REF(IHXBuffer*) /*OUT*/ pBuffer)
{
    XML_Error code = XML_GetErrorCode(m_pParser);
    /* Returns a string describing the error. */
    UINT32 ulByteIndex = XML_GetCurrentByteIndex(m_pParser);
    UINT32 ulColumnNumber = XML_GetCurrentLineNumber(m_pParser);

    
    const UCHAR* pPos = m_pCurrentBuffer->GetBuffer();
    if ( SUCCEEDED(m_pClassFactory->CreateInstance(CLSID_IHXBuffer, (void**)&pBuffer)) )
    {
	const char p[] = "No error context";
	if (m_pCurrentBuffer)
	{
	    if (ulByteIndex >= m_ulCurrentOffset && 
		ulByteIndex < m_ulCurrentOffset + m_pCurrentBuffer->GetSize())
	    {
		int i;
		int offset = ulByteIndex - m_ulCurrentOffset;
		int startPos = offset;
		// first we will back the startPos up to the begining of the 
		// line or 0
		for (; startPos > 0 && pPos[startPos-1] != '\n' &&
		    pPos[startPos-1] != '\r'; --startPos);

		// if the beginning of the line number is > 40 characters 
		// ahead, we want to jump ahead so the error text is not too long.
		if (offset - startPos >= 40)
		{
		    startPos = offset - 40;
		}

		// now we will find the end of the line.
		for (i=startPos;  pPos[i] && pPos[i] != '\n' && 
			pPos[i] != '\r'; ++i);

		if (SUCCEEDED(pBuffer->Set(&pPos[startPos], i-startPos+1)))
		{
		    pBuffer->GetBuffer()[i-startPos] = '\0';
		    return HXR_OK;
		}
		else
		{
		    return HXR_OUTOFMEMORY;
		}
	    }
	    else
	    {
		return pBuffer->Set((const UCHAR*)p, sizeof(p));
	    }
	}
	else
	{
	    return pBuffer->Set((const UCHAR*)p, sizeof(p));
	}
    }
    else
    {
	return HXR_FAIL;
    }
}


void HXExpatXMLParser::handleStartElement(const XML_Char *name, const XML_Char **atts)
{
    HX_LOG_BLOCK( "HXExpatXMLParser::handleStartElement" );
    	
    if (m_pResponse)
    {
	IHXValues* pAtt = NULL;
	{
	    HX_LOG_BLOCK( "HXExpatXMLParser::handleStartElement::createIHXValues" );
	    IUnknown* pUnkAtt = NULL;
	    m_pClassFactory->CreateInstance(CLSID_IHXValues, (void**)&pUnkAtt);
	    pUnkAtt->QueryInterface(IID_IHXValues, (void**)&pAtt);
	    HX_RELEASE(pUnkAtt);
	}
	if (*atts && **atts) 
	{
	    HX_LOG_BLOCK( "HXExpatXMLParser::handleStartElement::createIHXBuffer" );

	    do
	    {
		IHXBuffer* pBuf = NULL;
		m_pClassFactory->CreateInstance(CLSID_IHXBuffer, (void**)&pBuf);
		pBuf->Set((const UCHAR*)atts[1], strlen(atts[1])+1);
		pAtt->SetPropertyCString(atts[0], pBuf);
		HX_RELEASE(pBuf);
	    }
	    while (*(atts+=2));
	}
	
	{
	    int ulLine;
	    int ulCol;
	    {
	        HX_LOG_BLOCK( "HXExpatXMLParser::handleStartElement::XML_GetCurrentLineNumber" );
		ulLine = XML_GetCurrentLineNumber(m_pParser);
	    }
	    {
	        HX_LOG_BLOCK( "HXExpatXMLParser::handleStartElement::XML_GetCurrentColumnNumber" );
		ulCol = XML_GetCurrentColumnNumber(m_pParser);
	    }
	    m_pResponse->HandleStartElement((const char*)name, pAtt, ulLine,ulCol);
	}
	HX_RELEASE(pAtt);
    }
}

void HXExpatXMLParser::handleEndElement(const XML_Char *name)
{
    HX_LOG_BLOCK( "HXExpatXMLParser::handleEndElement" );
    	
    if (m_pResponse)
    {
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleEndElement((const char*)name, ulLine,ulCol);
    }
}

void HXExpatXMLParser::handleCharacterData(const XML_Char *s, int len)
{
    if (m_pResponse)
    {
	IHXBuffer* pBuf = NULL;
	m_pClassFactory->CreateInstance(CLSID_IHXBuffer, (void**)&pBuf);
	pBuf->Set((UCHAR*)s, len);
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleCharacterData(pBuf, ulLine,ulCol);
	HX_RELEASE(pBuf);
    }
}

void HXExpatXMLParser::handleProcessingInstruction(
				const XML_Char *target, const XML_Char *data)
{
    if (m_pResponse)
    {
	IHXValues* pAtt = NULL;
	IUnknown* pUnkAtt = NULL;
	m_pClassFactory->CreateInstance(CLSID_IHXValues, (void**)&pUnkAtt);
	pUnkAtt->QueryInterface(IID_IHXValues, (void**)&pAtt);
	HX_RELEASE(pUnkAtt);
	const char* pos = data;
	
	const char* pStartName = NULL;
	const char* pEndName = NULL;
	const char* pStartAtt = NULL;
	char cQuote = '"';
	const char* pEndAtt = NULL;

	for (;;)
	{
	    // eat white space
	    for(;*pos && isspace(*pos); ++pos);

            // if we've reached the end, break out
            if (*pos == '\0') break;

	    // get attribute name
	    for(pStartName = pos; *pos && !isspace(*pos) && 
	    	*pos != '='; ++pos);
	    
	    // eat white space
	    for(pEndName = pos;*pos && isspace(*pos); ++pos);

	    // require equals sign
	    if (*pos++ != '=')
	    	break;

	    // eat white space
	    for(;*pos && isspace(*pos); ++pos);

	    // get attribute value
	    if (*pos == '\'' || *pos == '"')
	    {
	    	cQuote = *pos++;
	    }
	    else
	    {
		break;
	    }
	    
	    for(pStartAtt = pos; *pos && *pos != cQuote;++pos);
	    pEndAtt = pos;

            // Advance past the quote
            ++pos;
	    // require a single whitespace or termination...
	    if (*pos != '\0' && !isspace(*pos))
	    {
	    	break;
	    }

	    char* name = new char[pEndName-pStartName+1];
	    if (!name)
	    {
		break;
	    }

	    strncpy(name, pStartName, pEndName - pStartName); /* Flawfinder: ignore */
	    name[pEndName-pStartName] = '\0';

	    IHXBuffer* pBuf = NULL;
	    m_pClassFactory->CreateInstance(CLSID_IHXBuffer, 
	    	(void**)&pBuf);
	    
	    if (!pBuf)
	    {
	    	HX_VECTOR_DELETE(name);
		break;
	    }

	    if (FAILED(pBuf->Set((UCHAR*)pStartAtt,
	    	pEndAtt-pStartAtt+1)))
	    {
	    	HX_VECTOR_DELETE(name);
		HX_RELEASE(pBuf);
		break;
	    }
	    
	    pBuf->GetBuffer()[pEndAtt-pStartAtt] = '\0';
	    
	    if (FAILED(pAtt->SetPropertyCString(name, pBuf)))
	    {
	    	HX_VECTOR_DELETE(name);
		HX_RELEASE(pBuf);
		break;
	    }
	    HX_RELEASE(pBuf);
	    HX_VECTOR_DELETE(name);
	}

	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleProcessingInstruction(target, pAtt, ulLine,ulCol);
       	HX_RELEASE(pAtt);
    }
}

void HXExpatXMLParser::handleComment(const XML_Char *data)
{
    if (m_pResponse)
    {
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleComment((const char*) data, ulLine, ulCol);
    }
}

void HXExpatXMLParser::handleStartCDataSection()
{
}

void HXExpatXMLParser::handleEndCDataSection()
{
}


void HXExpatXMLParser::handleDefault(const XML_Char *s, int len)
{
    if (m_pResponse)
    {
	IHXBuffer* pBuf = NULL;
	m_pClassFactory->CreateInstance(CLSID_IHXBuffer, (void**)&pBuf);
	pBuf->Set((UCHAR*)s, len);
	
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleDefault(pBuf, ulLine, ulCol);
	HX_RELEASE (pBuf);
    }
}

void HXExpatXMLParser::handleUnparsedEntityDecl(
			    const XML_Char *entityName,
			    const XML_Char *base,
			    const XML_Char *systemId,
			    const XML_Char *publicId,
			    const XML_Char *notationName)
{
    if (m_pResponse)
    {
	// note ... call back interface missing *base
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleUnparsedEntityDecl(entityName,systemId, publicId,
			    notationName, ulLine, ulCol);
    }
}

void HXExpatXMLParser::handleNotationDecl(
		      const XML_Char *notationName,
		      const XML_Char *base,
		      const XML_Char *systemId,
		      const XML_Char *publicId)
{
    if (m_pResponse)
    {
	// note ... call back interface missing *base
	int ulLine = XML_GetCurrentLineNumber(m_pParser);
	int ulCol = XML_GetCurrentColumnNumber(m_pParser);
	m_pResponse->HandleNotationDecl(notationName, systemId, publicId,
			    ulLine, ulCol);
    }
}

void HXExpatXMLParser::handleStartNamespaceDecl(
			      const XML_Char *prefix,
			      const XML_Char *uri)
{
    if (m_pNSResp)
    {
	m_pNSResp->HandleStartNamespaceDecl(prefix, uri);
    }
}

void HXExpatXMLParser::handleEndNamespaceDecl(const XML_Char *prefix)
{
    if (m_pNSResp)
    {
	m_pNSResp->HandleEndNamespaceDecl(prefix);
    }
}


int HXExpatXMLParser::handleNotStandalone()
{
    /* This is called if the document is not standalone (it has an
     * external subset or a reference to a parameter entity, but does not
     * have standalone="yes"). If this handler returns 0, then processing
     * will not continue, and the parser will return a
     * XML_ERROR_NOT_STANDALONE error.
     */
    return 1;
}

void HXExpatXMLParser::handleStartDoctypeDecl(const XML_Char *doctypeName)
{
    // note... no DTD callbacks...
}

void HXExpatXMLParser::handleEndDoctypeDecl()
{
    // note... no DTD callbacks...
}