// parse tag
private int ParseTag() {
int LineNum = _Scanner.LineNum;
int LinePos = _Scanner.LinePos;
int token = _Scanner.ScanMarkup();
switch (token) {
case XmlToken.TAG:
_NextFunction = _ParseElementIndex;
_CantHaveXmlDecl = true;
_ContinueParsing = true;
break;
case XmlToken.EOF:
return XmlToken.EOF;
case XmlToken.PI:
{
LinePos += 2; //To Skip markup <?
if (_Scanner.IsToken("xml")) {
//
// if xml is declared, there should not be any token before this
// if it is from ResolveEntity(), xml decl is allowed and should
// not be returned
//
if (_CantHaveXmlDecl)
throw new XmlException(Res.Xml_XmlDeclNotFirst, LineNum, LinePos);
if (_PIToken == null)
_PIToken = new XmlNameValueTokenInfo(_Scanner, _NsMgr, XmlNodeType.XmlDeclaration, -1, _Normalization);
_PIToken.LineNum = LineNum;
_PIToken.LinePos = LinePos;
ParseXmlDecl();
if (_IsExternal) {
_ContinueParsing = true;
}
else {
_PIToken.Name = _NameTable.Add("xml");
_PIToken.SetValue(_StringBuilder);
_PIToken.Depth = _ElementDepth + 1 + _EntityDepthOffset;
_CurrentToken = _PIToken;
}
}
else {
bool hasBody = _Scanner.ScanPIName();
String name = _Scanner.GetTextAtom();
if (String.Compare(name, "xml", true, CultureInfo.InvariantCulture) == 0)
throw new XmlException(Res.Xml_InvalidPIName, name, LineNum, LinePos);
if (_CheckNamespaces && _Scanner.Colon() != -1)
throw new XmlException(Res.Xml_InvalidPIName, name, LineNum, LinePos);
if (_PIToken == null)
_PIToken = new XmlNameValueTokenInfo(_Scanner, _NsMgr, XmlNodeType.ProcessingInstruction,
-1, _Normalization);
_CantHaveXmlDecl = true;
_PIToken.Name = name;
_PIToken.NodeType = XmlNodeType.ProcessingInstruction;
if (hasBody) {
_Scanner.ScanPI();
_PIToken.SetValue(_Scanner, null, _Scanner.StartPos, _Scanner.TextLength);
}
else {
_PIToken.Value = String.Empty;
}
_PIToken.Depth = _ElementDepth + 1 + _EntityDepthOffset;
_CurrentToken = _PIToken;
_Scanner.Advance(2);
}
}
break;
case XmlToken.COMMENT:
LinePos += 4; //To Skip markup <!--
if (_CommentToken == null)
_CommentToken = new XmlValueTokenInfo(_Scanner, _NsMgr, XmlNodeType.Comment, -1, _Normalization);
_CantHaveXmlDecl = true;
_CommentToken.SetValue(_Scanner, null, _Scanner.StartPos, _Scanner.TextLength);
_CommentToken.Depth = _ElementDepth + 1 + _EntityDepthOffset;
_CurrentToken = _CommentToken;
_Scanner.Advance(3);
break;
case XmlToken.CDATA:
_CantHaveXmlDecl = true;
LinePos += 9; //To skip the Markup <![CDATA[
if ((XmlNodeType.Document == _PartialContentNodeType || XmlNodeType.None == _PartialContentNodeType)
&& (_ElementStack.Length < 1 || _RootCount < 1))
throw new XmlException(Res.Xml_InvalidRootData, LineNum, LinePos);
if (_CDATAToken == null)
_CDATAToken = new XmlValueTokenInfo(_Scanner, _NsMgr, XmlNodeType.CDATA, -1, _Normalization);
_CDATAToken.SetValue(_Scanner, null, _Scanner.StartPos, _Scanner.TextLength);
_CDATAToken.Depth = _ElementDepth + 1 + _EntityDepthOffset;
_CurrentToken = _CDATAToken;
_Scanner.Advance(3);
break;
case XmlToken.DECL:
{
if (_DtdParser != null) {
//A document cant have multiple doctyp
throw new XmlException(Res.Xml_MultipleDTDsProvided, LineNum, LinePos);
}
if (_RootCount > 0) {
throw new XmlException(Res.Xml_BadDTDLocation, LineNum, LinePos);
}
int startPos = _Scanner.CurrentPos-2;
_Scanner.ReadBufferConsistency = _Scanner.StartPos;
if (_DocTypeToken == null)
_DocTypeToken = new XmlDtdTokenInfo(_Scanner, _NsMgr, XmlNodeType.DocumentType, -1, _Normalization);
_CantHaveXmlDecl = true;
_Used = -1;
_DocTypeToken.Name = ParseDtd( _Scanner );
if (_DtdParser != null) {
LinePos = _DtdParser.DTDNameStartPosition;
LineNum = _DtdParser.DTDNameStartLine;
}
if (!_BufferConsistency)
_Scanner.ReadBufferConsistency = -1;
_DocTypeToken._DtdParser = _DtdParser;
_DocTypeToken.Depth = _ElementDepth + 1 + _EntityDepthOffset;
_CurrentToken = _DocTypeToken;
}
break;
case XmlToken.ENDTAG:
{
LinePos += 2; //to skip the markup </
_Scanner.ScanNameWOCharChecking();
if (_LastElementInfo == null) {
throw new XmlException(Res.Xml_UnexpectedEndTag, LineNum, LinePos);
}
int count = _Scanner.TextLength;
char[] scannerbuff = _Scanner.InternalBuffer;
if(_LastElementInfo._NameWPrefix.Length != count) {
// The length of the start tag and end tag should be the same.
// If it is not, no need to check char by char.
goto errorCase;
}
int scannerOffset = _Scanner.TextOffset;
for (int i = scannerOffset, j = 0; i < (scannerOffset + count) && j < count; i++, j++) {
if (_LastElementInfo._NameWPrefix[j] != scannerbuff[i]) {
goto errorCase;
}
}
//
// begin and end tag has to come from the same scanner
//
if (_LastElementInfo._Scanner != _Scanner) {
throw new XmlException(Res.Xml_TagNotInTheSameEntity, _LastElementInfo._NameWPrefix, LineNum, LinePos);
}
_EndElementToken.SetName(_LastElementInfo._NameWPrefix, _LastElementInfo._LocalName, _LastElementInfo._Prefix, _LastElementInfo._NS,
_ElementDepth + _EntityDepthOffset, _Scanner);
_CurrentEndElementStart = _Scanner.StartPos-2;
ReadEndElementToken();
_Scanner.ScanToken(XmlToken.TAGEND); // skip whitespace to the '>'
_CurrentEndElementEnd = _Scanner.CurrentPos;
_ElementDepth--;
}
break;
}
_CurrentToken.LineNum = LineNum;
_CurrentToken.LinePos = LinePos;
return token;
errorCase:
String[] args;
string exceptionCode;
if (String.Empty != _BaseURI) {
args = new String[4];
args[3] = _BaseURI;
exceptionCode = Res.Xml_TagMismatchFileName;
}
else {
args = new String[3];
exceptionCode = Res.Xml_TagMismatch;
}
args[0] = _LastElementInfo._NameWPrefix;
args[1] = _LastElementInfo._LineNumber.ToString();
args[2] = _Scanner.GetText();
throw new XmlException(exceptionCode, args, LineNum, LinePos);
}
// protected constructor, users should not be using this
/// <include file='doc\XmlTextReader.uex' path='docs/doc[@for="XmlTextReader.XmlTextReader1"]/*' />
/// <internalonly/>
/// <devdoc>
/// <para>Initializes a new instance of the XmlTextReader class with the specified XmlNameTable.</para>
/// </devdoc>
protected XmlTextReader( XmlNameTable nt ) {
//
// internal variables
//
_ElementDepth = -1;
_EntityDepthOffset = 0;
_ReadCount = -1;
//
// variables for properties
//
_ReadState = ReadState.Initial;
_NextState = 1;
//
// create interal components
//
_NameTable = nt;
_ElementStack = new HWStack(STACK_INCREMENT);
_ScannerStack = new HWStack(STACK_INCREMENT);
//
//create atom
//
_StringName = _NameTable.Add("String");
_MicrosoftSystemNamespace = _NameTable.Add("System");
_Decimal = _NameTable.Add("#decimal");
_Hex = _NameTable.Add("#hexidecimal");
_Amp = _NameTable.Add("amp");
_Lt = _NameTable.Add("lt");
_Gt = _NameTable.Add("gt");
_Quot = _NameTable.Add("quot");
_Apos = _NameTable.Add("apos");
_XmlNs = _NameTable.Add("xmlns");
_XmlSpaceAtom = _NameTable.Add("xml:space");
_XmlLangAtom = _NameTable.Add("xml:lang");
//
//fields collection
//
_Used = -1;
_MarkScannerCount = 10000;
//
_XmlSpace = XmlSpace.None;
_XmlLang = String.Empty;
_WhitespaceHandling = WhitespaceHandling.All;
_XmlResolver = new XmlUrlResolver();
_CheckNamespaces = true;
_TmpToken = new XmlNSElementTokenInfo(_Scanner, _NsMgr, XmlNodeType.None, String.Empty,-1, -1, -1, 0,false);
_CurrentToken = _TmpToken;
// PERF: these node types are not common therefore they
// will only be constructed when used
//
_CommentToken = null;
_CDATAToken = null;
_DocTypeToken = null;
_PIToken = null;
_EndEntityToken = null;
_NextFunction = _InitReader;
_StringBuilder = new StringBuilder(100);
}