hxxmlprs.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxxmlprs.cpp,v 1.3.36.3 2004/07/09 01:44:10 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (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.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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 "hxresult.h"
#include "hxassert.h"
#include "hxheap.h"

#include "hxcom.h"
#include "hxcomm.h"
#include "hxfiles.h"
#include "ihxpckts.h"
#include "hxxml.h"
#include "xmlreslt.h"

#include "cbbqueue.h"
#include "hxbuffer.h"
#include "chxpckts.h"
#include "looseprs.h"

#include "hxxmlprs.h"

#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif

#ifndef _VXWORKS
static const UINT32 BUFSIZE = 1024;
#endif

HXXMLParser::HXXMLParser(BOOL bAllowNonXMLComments):
    m_lRefCount(0),
    m_pParser(NULL),
    m_pResponse(NULL),
    m_bAllowNonXMLComments(bAllowNonXMLComments)
{
}

HXXMLParser::~HXXMLParser()
{
    Close();
}


/*
 * IUnknown methods
 */

STDMETHODIMP 
HXXMLParser::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
	AddRef();
	*ppvObj = this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXXMLParser))
    {
	AddRef();
	*ppvObj = (IHXXMLParser*)this;
	return HXR_OK;
    }
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}

STDMETHODIMP_(ULONG32) 
HXXMLParser::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(ULONG32) 
HXXMLParser::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}


/*
 * IHXXMLParser methods
 */

STDMETHODIMP
HXXMLParser::Init(IHXXMLParserResponse* /*IN*/  pResponse,
		   const char*	    /*IN*/	pEncoding,
		   BOOL		    /*IN*/	bStrict)
{
    HX_RESULT rc = HXR_OK;

    m_pResponse = pResponse;
    m_pResponse->AddRef(); 

    if(bStrict)
    {
	m_pParser = new HXStrictXMLParser();
    }
    else
    {
	m_pParser = new HXLooseXMLParser(m_bAllowNonXMLComments);
    }

    rc = m_pParser->Init(pResponse, pEncoding);

    return rc;
}

STDMETHODIMP
HXXMLParser::Close()
{
    HX_RESULT rc = HXR_OK;

    HX_RELEASE(m_pResponse);
    HX_DELETE(m_pParser);

    return rc;
}


STDMETHODIMP
HXXMLParser::Parse(IHXBuffer*	/*IN*/	    pBuffer,
		  BOOL		/*IN*/	    bIsFinal)
{
    HX_RESULT rc = HXR_OK;

    rc = m_pParser->Parse(pBuffer, bIsFinal);    

    return rc;
}

STDMETHODIMP
HXXMLParser::GetCurrentLineNumber(REF(ULONG32) /*OUT*/ ulLineNumber)
{
    HX_RESULT rc = HXR_OK;

    rc = m_pParser->GetCurrentLineNumber(ulLineNumber);

    return rc;
}

STDMETHODIMP
HXXMLParser::GetCurrentColumnNumber(REF(ULONG32) /*OUT*/ ulColumnNumber)
{
    HX_RESULT rc = HXR_OK;

    rc = m_pParser->GetCurrentColumnNumber(ulColumnNumber);

    return rc;
}

STDMETHODIMP
HXXMLParser::GetCurrentByteIndex(REF(ULONG32) /*OUT*/ ulByteIndex)
{
    HX_RESULT rc = HXR_OK;

    rc = m_pParser->GetCurrentByteIndex(ulByteIndex);

    return rc;
}

STDMETHODIMP
HXXMLParser::GetCurrentErrorText(REF(IHXBuffer*) /*OUT*/ pBuffer)
{
    HX_RESULT rc = HXR_OK;

    rc = m_pParser->GetCurrentErrorText(pBuffer);

    return rc;
}

HX_RESULT
HXXMLParser::InitErrorNotifier(ErrorNotifier* /*OUT*/ pNotifier)
{
    return m_pParser->InitErrorNotifier(pNotifier);
}


/*
 * virtual base class methods
 */

HXActualXMLParser::HXActualXMLParser():
    m_pResponse(NULL)
{
}

HXActualXMLParser::~HXActualXMLParser()
{
}

void HXActualXMLParser::CheckEncoding(XMLParser* pParser, IHXBuffer* pBuffer)
{
    if (pParser && pBuffer)
    {
        // Check if this buffer has any prolog info
        char* pszVersion  = NULL;
        char* pszEncoding = NULL;
        HX_RESULT rv = pParser->GetPrologInfo((const char*) pBuffer->GetBuffer(),
                                              pBuffer->GetSize(),
                                              pszVersion,
                                              pszEncoding);
        if (SUCCEEDED(rv) && pszEncoding && strlen(pszEncoding) > 0)
        {
            // Get the encoding from the parser
            char* pszParserEncoding = NULL;
            HX_RESULT rv = pParser->GetEncoding(pszParserEncoding);
            if (SUCCEEDED(rv) &&
                strcmp(pszEncoding, pszParserEncoding) != 0)
            {
                pParser->SetEncoding(pszEncoding);
            }
            HX_VECTOR_DELETE(pszParserEncoding);
        }
        HX_VECTOR_DELETE(pszVersion);
        HX_VECTOR_DELETE(pszEncoding);
    }
}

/* 
 * HXLooseXMLParser methods
 */

HXLooseXMLParser::HXLooseXMLParser(BOOL bAllowNonXMLComments):
    m_pParser(NULL),
    m_pByteQueue(NULL),
    m_bAllowNonXMLComments(bAllowNonXMLComments)
{
}

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

HX_RESULT
HXLooseXMLParser::Init(IHXXMLParserResponse* pResponse,
		       const char* pEncoding)
{
    m_pResponse = pResponse;
    m_pParser = new XMLParser(FALSE, pEncoding, m_bAllowNonXMLComments);
    m_pByteQueue = new CBigByteQueue(BUFSIZE);

    return HXR_OK;
}

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

    // Check the encoding
    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
HXLooseXMLParser::GetCurrentLineNumber(REF(ULONG32) ulLineNumber)
{
    HX_RESULT rc = HXR_OK;

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

    return rc;
}

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

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

    return rc;
}

HX_RESULT
HXLooseXMLParser::GetCurrentByteIndex(REF(ULONG32) ulByteIndex)
{
    HX_RESULT rc = HXR_OK;

    return rc;
}

HX_RESULT
HXLooseXMLParser::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;
}

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

    XMLTag* pTag = NULL;

    BOOL bDone = FALSE;
    while(!bDone && SUCCEEDED(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 needed anymore, so delete
	HX_VECTOR_DELETE(pBuf);
	p = NULL;

	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 XMLPComment:
	    {
		const char* pValue = pTag->m_cur_attribute->value;
		rc = m_pResponse->HandleComment(pValue,0,0);
	    }
	    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,0,0);
		HX_RELEASE(pBuffer);
	    }
	    break;

	    case XMLPDirective:
	    {
		const char* pValue = pTag->m_name;
		if(strcmp(pValue, "DOCTYPE") == 0)
		{
		    // m_bExternalDoctype = TRUE;	
		}
	    }
	    break;

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

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

		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,0,0);
		HX_RELEASE(pValues);
	    }
	    break;

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

		    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,