looseprs.cpp

linux下的一款播放器

		    {
			if(end - pos < 8)
			{
			    buf = pos;
			    return;
			}
			pos = (const char*)xmlStr.GetNextChar(uLen);
			if(strncasecmp(pos, "include", 7) == 0)
			{
			    pos += 7;
			    m_comment_get_arg = 1;
			    m_comment_pos = 0;
			    strcpy(m_comment_command, "include");
			}
		    }
		}
		break;
	    case 2:
		if(*pos == '-')
		    m_comment_state = 3;
		else
		    m_comment_state = 1;
		break;
	    case 3:
		if(*pos == '>')
		{
		    nCommentDepth--;
		    if (nCommentDepth == 0)
		    {
			m_comment_state = 0;
			buf = (const char*)xmlStr.GetNextChar(uLen);
		    }
		    else
			m_comment_state = 1;
		}
		else
		    m_comment_state = 1;
		break;
	    case 4:
		// Ignore nested comments while looking for our end tag
		if (*pos == '!')
		    m_comment_state = 5;
		else
		    m_comment_state = 1;
		break;
	    case 5:
		if (*pos == '-')
		    m_comment_state = 6;
		else
		    m_comment_state = 1;
		break;
	    case 6:
		if (*pos == '-')
		{
		    nCommentDepth++;
		}
		m_comment_state = 1;
		break;
	}
	if(m_comment_state > 0)
	{
	    switch(m_comment_get_arg)
	    {
		case 1:
		    if(*pos != '"' && !isspace(*pos))
			m_comment_get_arg = 0;
		    else if(*pos == '"')
			m_comment_get_arg = 2;
		    break;
		case 2:
		    if(*pos != '"')
			if (m_comment_pos < 1023) m_comment_arg[m_comment_pos++] = *pos;
		    else
		    {
			if (m_comment_pos < 1024) m_comment_arg[m_comment_pos] = 0;
			m_comment_get_arg = 3;
		    }
		    break;
		default:
		    break;
	    }
	}
	pos = (const char*)xmlStr.GetNextChar(uLen);
    }
}

XMLParseResult
XMLParser::Parse(const char*& buf, UINT32 len, XMLTag*& tag, BOOL bIsFinal)
{
    const char* open;
    const char* close;
    const char* cur;
    const char* afterclose;
    
    tag = NULL;

    if(m_comment_state > 0)
    {
	FindCommentClose(buf, buf, buf+len);
	if(m_comment_state != 0)
	{
	    SetError(m_pLastError, XMLErrorNoClose, 0, 0, buf, len, 0);
	    return XMLPNoClose;
	}
	else if(m_comment_get_arg != 3)
	{
	    tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);
	    tag->new_attribute()->value = new_string("");   // dummy tag
	    return XMLPComment;
	}
	// Got a comment command
	tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);
	tag->new_attribute()->value = new_string(m_comment_arg);
	tag->m_cur_attribute->name = new_string(m_comment_command);
	return XMLPComment;
    }

    if(*buf != '<')
    {
	// If there isn't a tag right away, tell the user there's just plain
	// text here.
	UINT32 ulLine = 0;
	UINT32 ulCol = 0;
	const char* errPos = NULL;
	UINT32 errLen = 0;
	
	cur = buf;
	while(((UINT32)(cur - buf) < len) && (*cur != '<'))
	{
	    if(*cur == '\n')
	    {
		m_ulCurrentLine++;
		m_ulCurrentCol = 1;
	    }
	    else
	    {
		m_ulCurrentCol++;
	    }

	    if (m_bStoreErrors)
	    {
		// check for ]]>
		// validate refferences.
		if (cur - buf > 3 && *cur == ']' && *(cur+1) == ']' &&
		    *(cur+2) == '>' && !errPos)
		{
		    ulLine = m_ulCurrentLine;
		    ulCol = m_ulCurrentCol;
		    errPos = buf;
		    errLen = len;
		}
	    }
	    cur++;
	}
	tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);
	char* pText = new char[cur - buf + 1];
	strncpy(pText, buf, cur - buf); /* Flawfinder: ignore */
	pText[cur - buf] = '\0';
	tag->new_attribute()->value = new_string(pText);
	if (errPos)
	{
	    XMLError* err = NULL;
	    SetError(err, XMLErrorInvalidGTafter2RSQB, 
		ulLine, ulCol, errPos, errLen, 0);
	    tag->m_errs->Add(err);
	}
	delete [] pText;
	buf = cur;
	return XMLPPlainText;
    }
    open = buf;
    CHXXMLEncode xmlStr(m_pEncoding, (BYTE*)open, len);
    UINT16 uLen = 0;

    m_ulTagStartLine = m_ulCurrentLine;
    m_ulTagStartCol = m_ulCurrentCol;

    BOOL   bInDoubleQuote = FALSE;
    BOOL   bInSingleQuote = FALSE;
    BOOL   bInComment	  = FALSE;
    BOOL   bInDeclaration = FALSE;
    UINT16 nCommentDepth  = 0;
    
    UINT32 ulLine = 0;
    UINT32 ulCol = 0;
    const char* errPos = NULL;
    UINT32 errLen = 0;

    if(*(open+1) && *(open+1) == '!' &&
       *(open+2) && *(open+2) == '-' && 
       *(open+3) && *(open+3) == '-')
    {
	// '<!--' starts a comment
	bInComment = TRUE;
    }
    for(close = (const char*)xmlStr.GetNextChar(uLen); close < buf+len; close = (const char*)xmlStr.GetNextChar(uLen))
    {
	if(*close == '\n')
	{
	    m_ulCurrentLine++;
	    m_ulCurrentCol = 1;
	}
	else
	{
	    m_ulCurrentCol++;
	}
	if(*close == '"' && !bInComment)
	{
	    if(!bInSingleQuote)
	    {
		if(bInDoubleQuote)
		{
		    bInDoubleQuote = FALSE;
		}
		else
		{
		    bInDoubleQuote = TRUE;
		}
	    }
	}
	else if(*close == '\'' && !bInComment)
	{
	    if(!bInDoubleQuote)
	    {
		if(bInSingleQuote)
		{
		    bInSingleQuote = FALSE;
		}
		else
		{
		    bInSingleQuote = TRUE;
		}
	    }
	}
	else if(*close == '[' && !bInDeclaration)
	{
	    bInDeclaration = TRUE;
	}
	else if(*close == ']' && bInDeclaration)
	{
	    bInDeclaration = FALSE;
	}
	// Increase the depth if we find a comment within a comment
	else if(*(close) == '<' && bInComment)
	{
	    if(*(close+1) && *(close+1) == '!' &&
	       *(close+2) && *(close+2) == '-' && 
	       *(close+3) && *(close+3) == '-')
	    {
		// '<!--' starts a comment
		nCommentDepth++;
	    }
	}
	else if(*close == '>')
	{
	    // If we are in a comment, we should only stop at a comment end
	    // (Comments must end with "-->")
	    if (bInComment)
	    {
		if ((!m_bAllowNonXMLComments &&
		     (close - open) > 5      && 
		     *(close-1) == '-'       && 
		     *(close-2) == '-')          ||
		    (m_bAllowNonXMLComments  &&
		     (close - open) > 3))
		{
		    nCommentDepth--;
		    if (!nCommentDepth)
		    {
			break;
		    }
		}
	    }
	    else
	    {
		if (!bInDoubleQuote && !bInSingleQuote && !bInDeclaration)
		{
		    break;
		}
	    }
	}

	if (m_bStoreErrors && bInComment && !errPos)
	{
	    if (*close == '-' && *(close+1) == '-' 
		&& *(close + 2) != '>' && (close - open > 4))
	    {
		ulLine = m_ulCurrentLine;
		ulCol = m_ulCurrentCol;
		errPos = buf;
		errLen = len;
	    }
	}
    }

    if( (close<=buf+len) && *close != '>')
    {
	if(!bIsFinal)
	{
	    return XMLPNotDone;
	}
	SetError(m_pLastError, XMLErrorNoClose, 0, 0, buf, len, 0);
	buf = open;
	return XMLPNoClose;
    }

    afterclose = close+1;

    if(*(open+1) == '!')
    {
	if(*(open+2) == '-' && *(open+3) == '-')
	{
	    // '<!--' starts a comment
	    m_comment_state = 1;
	    m_comment_start = TRUE;
	    m_bCommentWasFound = TRUE;
	    FindCommentClose(buf, open+4, buf + len);
	    if(m_comment_state != 0)
	    {
		SetError(m_pLastError, XMLErrorNoClose, 0, 0, buf, len, 0);
		return XMLPNoClose;
	    }
	    else if(m_comment_get_arg != 3)
	    {
		tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);
		const char* pBeginComment = open + 4;
		int commentLen = buf - pBeginComment - 3;
		tag->new_attribute()->value = new_string(pBeginComment, commentLen);
		if (errPos)
		{
		    XMLError* err = NULL;
		    SetError(err, XMLErrorTwoDashNotAllowed, ulLine,
			ulCol, errPos, errLen, 0);
		    tag->m_errs->Add(err);
		}
		return XMLPComment;
	    }
	    // Got a comment command
	    tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);
	    tag->new_attribute()->value = new_string(m_comment_arg);
	    tag->m_cur_attribute->name = new_string(m_comment_command);
	    return XMLPComment;
	}
	XMLParseResult rc = ParseTag(open+1, close, XMLDirectiveTag, tag);
	if(XMLPTag == rc)
	{
	    // TODO - Scan Directive 
	    buf = afterclose;
	    return XMLPDirective;
	}
	else if(XMLPAttributeValueNotQuoted == rc)
	{
	    SetError(m_pLastError, XMLErrorMissingQuote, 0, 0, buf, len, 0);
	}
	else
	{
	    SetError(m_pLastError, XMLErrorNoClose, 0, 0, buf, len, 0);
	}
	buf = afterclose;
	return XMLPBadDirective;
    }
    
    if(*(open + 1) == '?')
    {
	// A Processing Instruction
	XMLParseResult rc = ParseTag(open+1, close, XMLProcInstTag, tag);
	if(XMLPTag == rc)
	{
	    buf = afterclose;
	    if (m_bStrictCompliance)
	    {
		//[SMIL 1.0 Compliance] Fixes PR 9862.  No comment can
		// precede a processor instruction (xml prolog):
		if (m_bCommentWasFound  &&  m_bXMLandSMIL10FullCompliance)
		{
		    SetError(m_pLastError, XMLErrorCommentBeforeProcInst,
			    0, 0, buf, len, 0);
		    return XMLPCommentBeforeProcInst;
		}
		
		if (m_bStoreErrors)
		{
		    XMLError* err = NULL;
		    SetError(err, XMLErrorCommentBeforeProcInst,
			    0, 0, buf, len, 0);
		    tag->m_errs->Add(err);
		}
	    }

	    if (m_bStoreErrors)
	    {
		ScanTag(open+1, close, tag);
	    }
	    
	    return XMLPProcInst;
	}
        SetError(m_pLastError, XMLErrorNoClose, 0, 0, buf, len, 0);
	return XMLPBadProcInst;
    }
    // just a plain old tag
    XMLParseResult rc = ParseTag(open, close, XMLPlainTag, tag);
    if(XMLPTag == rc)
    {
	buf = afterclose;
	if (m_bStoreErrors)
	{
	    ScanTag(open, close, tag);
	}
	return XMLPTag;
    }
    else if(XMLPBadEndTag == rc)
    {
	if(m_pCurrentFrame && m_pCurrentFrame->name)
	{
	    SetError(m_pLastError, XMLErrorBadEndTag, 0, 0, buf, len, m_pCurrentFrame->name);
	}
	else
	{
	    SetError(m_pLastError, XMLErrorBadEndTag, 0, 0, buf, len, 0);
	}
    }
    else if(XMLPBadAttribute == rc)
    {
	SetError(m_pLastError, XMLErrorBadAttribute, 0, 0, buf, len, 0);
    }
    else if(XMLPAttributeValueNotQuoted == rc)
    {
	SetError(m_pLastError, XMLErrorMissingQuote, 0, 0, buf, len, 0);
    }
    else if(XMLPDupAttribute == rc)
    {
	SetError(m_pLastError, XMLErrorDupAttribute, 0, 0, buf, len, 0);
    }
    else
    {
	SetError(m_pLastError, XMLUnknownError, 0, 0, buf, len, 0);
    }

    return rc;
}

XMLParseResult
XMLParser::ParseTag(const char* open, const char* close, XMLTagType tType, XMLTag*& tag)
{
    const char* cur = open+1;
    const char* afterclose = close+1;
    BOOL bHasAttributeNames = TRUE;
    BOOL bUseNonQuotedValues = FALSE;
    BOOL bHasDirectives = FALSE;

    tag = new XMLTag(m_bStrictCompliance, m_bStoreErrors);

    switch(tType)
    {
	case XMLPlainTag:
	{
	    if(*(close - 1) == '/')
	    {
		tag->m_need_close = FALSE;
		close--;
	    }
	}
	break;
	case XMLProcInstTag:
	{
	    tag->m_need_close = FALSE;
	    if(*(close - 1) == '?')
	    {
		close--;
	    }
	}
	break;
	case XMLDirectiveTag:
	{
	    bHasAttributeNames = FALSE;
	    bUseNonQuotedValues = TRUE;
	    bHasDirectives = TRUE;
	    tag->m_need_close = FALSE;
	}
	break;
	default:
	{
	    tag->m_need_close = FALSE;
	}
	break;
    }
    tag->m_type = tType;

    GetStringResult res = GetString(cur, close, tag->m_name, TagType);
    if(res == GSEndTag)
    {
	tag->m_type = XMLEndTag;
	tag->m_need_close = FALSE;
	if(!m_pCurrentFrame ||
	    !m_pCurrentFrame->name)
	{
	    return XMLPBadEndTag;
	}

	if(m_bStrictCompliance)
	{
	    if(strcmp(tag->m_name, m_pCurrentFrame->name) != 0)
	    {
		return XMLPBadEndTag;
	    }
	}
	else
	{
	    if(strcasecmp(tag->m_name, m_pCurrentFrame->name) != 0)
	    {
		return XMLPBadEndTag;
	    }
	}
	tag->elem = m_pCurrentFrame->elemcount;
	if(m_pCurrentFrame)
	    delete m_pCurrentFrame;
	m_pCurrentFrame = (XMLFrame*)m_pStack.Pop();
	return XMLPTag;
    }
    else if(res == GSMissingQuote)
    {
	delete tag;
	tag = NULL;
	return XMLPAttributeValueNotQuoted;
    }
    else if(tag->m_name && tag->m_need_close)
    {
	tag->elem = m_pCurrentFrame->elemcount++;

	XMLFrame* frame = new XMLFrame;
	frame->elemcount = 0;
	frame->name = new_string(tag->m_name);
	m_pStack.Push(m_pCurrentFrame);
	m_pCurrentFrame = frame;
    }
    else
    {
	tag->elem = m_pCurrentFrame->elemcount++;
    }

    if(GSFoundExpected != res)
    {
	delete tag;
	tag = NULL;
	return XMLPNoTagType;
    }
    else
    {
	while(cur < close)
	{
	    if(bHasAttributeNames)
	    {
		GetStringResult res = GetString(cur, close, 
						tag->new_attribute()->name,
						AttributeName);
		if(res == GSNoValue)
		{
		    delete tag->m_cur_attribute;
		    tag->m_numAttributes--;
		    break;
		}
		switch(res)
		{
		    case GSValueOnly:
			// The user of this parser will fill in the name of this
			// attribute
			tag->m_cur_attribute->value = tag->m_cur_attribute->name;
			tag->m_cur_attribute->name = NULL;
			continue;
		    case GSFoundExpected:
			break;
		    default:
			delete tag;