private int DetermineFormat(TokenizerStream stream)
{
if (stream.GetNextToken() == Tokenizer.bra)
{
if (stream.GetNextToken() == Tokenizer.quest)
{
_t.GetTokens(stream, -1, true);
stream.GoToPosition(2);
bool sawEquals = false;
bool sawEncoding = false;
short i;
for (i = stream.GetNextToken(); i != -1 && i != Tokenizer.ket; i = stream.GetNextToken())
{
switch (i)
{
case Tokenizer.cstr:
if (sawEquals && sawEncoding)
{
_t.ChangeFormat(System.Text.Encoding.GetEncoding(stream.GetNextString()));
return(0);
}
else if (!sawEquals)
{
if (String.Compare(stream.GetNextString(), "encoding", StringComparison.Ordinal) == 0)
{
sawEncoding = true;
}
}
else
{
sawEquals = false;
sawEncoding = false;
stream.ThrowAwayNextString();
}
break;
case Tokenizer.equals:
sawEquals = true;
break;
default:
throw new XmlSyntaxException("XMLSyntax_UnexpectedEndOfFile");
}
}
return(0);
}
}
return(2);
}
private void ParseContents()
{
short i;
TokenizerStream stream = new TokenizerStream();
_t.GetTokens(stream, 2, false);
stream.Reset();
int gotoPosition = DetermineFormat(stream);
stream.GoToPosition(gotoPosition);
_t.GetTokens(stream, -1, false);
stream.Reset();
int neededIndex = 0;
GetRequiredSizes(stream, ref neededIndex);
_doc = new SecurityDocument(neededIndex);
int position = 0;
stream.Reset();
for (i = stream.GetNextFullToken(); i != -1; i = stream.GetNextFullToken())
{
if ((i & c_flag) != c_flag)
{
continue;
}
else
{
switch ((short)(i & 0xFF00))
{
case c_elementtag:
_doc.AddToken(SecurityDocument.c_element, ref position);
_doc.AddString(stream.GetNextString(), ref position);
break;
case c_attributetag:
_doc.AddToken(SecurityDocument.c_attribute, ref position);
_doc.AddString(stream.GetNextString(), ref position);
_doc.AddString(stream.GetNextString(), ref position);
break;
case c_texttag:
_doc.AddToken(SecurityDocument.c_text, ref position);
_doc.AddString(stream.GetNextString(), ref position);
break;
case c_additionaltexttag:
_doc.AppendString(" ", ref position);
_doc.AppendString(stream.GetNextString(), ref position);
break;
case c_childrentag:
_doc.AddToken(SecurityDocument.c_children, ref position);
break;
case c_wastedstringtag:
stream.ThrowAwayNextString();
break;
default:
throw new XmlSyntaxException("error");
}
}
}
}
private void GetRequiredSizes(TokenizerStream stream, ref int index)
{
bool needToBreak = false;
bool needToPop = false;
bool createdNode = false;
bool intag = false;
int stackDepth = 1;
SecurityElementType type = SecurityElementType.Regular;
String strValue = null;
bool sawEquals = false;
bool sawText = false;
int status = 0;
short i;
do
{
for (i = stream.GetNextToken(); i != -1; i = stream.GetNextToken())
{
switch (i & 0x00FF)
{
case Tokenizer.cstr:
{
if (intag)
{
if (type == SecurityElementType.Comment)
{
// Ignore data in comments but still get the data
// to keep the stream in the right place.
stream.ThrowAwayNextString();
stream.TagLastToken(c_wastedstringtag);
}
else
{
// We're in a regular tag, so we've found an attribute/value pair.
if (strValue == null)
{
// Found attribute name, save it for later.
strValue = stream.GetNextString();
}
else
{
// Found attribute text, add the pair to the current element.
if (!sawEquals)
{
throw new XmlSyntaxException(_t.LineNo);
}
stream.TagLastToken(c_attributetag);
index += SecurityDocument.EncodedStringSize(strValue) +
SecurityDocument.EncodedStringSize(stream.GetNextString()) +
1;
strValue = null;
sawEquals = false;
}
}
}
else
{
// We're not in a tag, so we've found text between tags.
if (sawText)
{
stream.TagLastToken(c_additionaltexttag);
index += SecurityDocument.EncodedStringSize(stream.GetNextString()) +
SecurityDocument.EncodedStringSize(" ");
}
else
{
stream.TagLastToken(c_texttag);
index += SecurityDocument.EncodedStringSize(stream.GetNextString()) +
1;
sawText = true;
}
}
}
break;
case Tokenizer.bra:
intag = true;
sawText = false;
i = stream.GetNextToken();
if (i == Tokenizer.slash)
{
stream.TagLastToken(c_childrentag);
while (true)
{
// spin; don't care what's in here
i = stream.GetNextToken();
if (i == Tokenizer.cstr)
{
stream.ThrowAwayNextString();
stream.TagLastToken(c_wastedstringtag);
}
else if (i == -1)
{
throw new XmlSyntaxException("XMLSyntax_UnexpectedEndOfFile");
}
else
{
break;
}
}
if (i != Tokenizer.ket)
{
throw new XmlSyntaxException("XMLSyntax_ExpectedCloseBracket");
}
intag = false;
// Found the end of this element
index++;
sawText = false;
stackDepth--;
needToBreak = true;
}
else if (i == Tokenizer.cstr)
{
// Found a child
createdNode = true;
stream.TagLastToken(c_elementtag);
index += SecurityDocument.EncodedStringSize(stream.GetNextString()) +
1;
if (type != SecurityElementType.Regular)
{
throw new XmlSyntaxException(_t.LineNo);
}
needToBreak = true;
stackDepth++;
}
else if (i == Tokenizer.bang)
{
// Found a child that is a comment node. Next up better be a cstr.
status = 1;
do
{
i = stream.GetNextToken();
switch (i)
{
case Tokenizer.bra:
status++;
break;
case Tokenizer.ket:
status--;
break;
case Tokenizer.cstr:
stream.ThrowAwayNextString();
stream.TagLastToken(c_wastedstringtag);
break;
default:
break;
}
} while (status > 0);
intag = false;
sawText = false;
needToBreak = true;
}
else if (i == Tokenizer.quest)
{
// Found a child that is a format node. Next up better be a cstr.
i = stream.GetNextToken();
if (i != Tokenizer.cstr)
{
throw new XmlSyntaxException(_t.LineNo);
}
createdNode = true;
type = SecurityElementType.Format;
stream.TagLastToken(c_elementtag);
index += SecurityDocument.EncodedStringSize(stream.GetNextString()) +
1;
status = 1;
stackDepth++;
needToBreak = true;
}
else
{
throw new XmlSyntaxException("XMLSyntax_ExpectedSlashOrString");
}
break;
case Tokenizer.equals:
sawEquals = true;
break;
case Tokenizer.ket:
if (intag)
{
intag = false;
continue;
}
else
{
throw new XmlSyntaxException("XMLSyntax_UnexpectedCloseBracket");
}
// not reachable
case Tokenizer.slash:
i = stream.GetNextToken();
if (i == Tokenizer.ket)
{
// Found the end of this element
stream.TagLastToken(c_childrentag);
index++;
stackDepth--;
sawText = false;
needToBreak = true;
}
else
{
throw new XmlSyntaxException("XMLSyntax_ExpectedCloseBracket");
}
break;
case Tokenizer.quest:
if (intag && type == SecurityElementType.Format && status == 1)
{
i = stream.GetNextToken();
if (i == Tokenizer.ket)
{
stream.TagLastToken(c_childrentag);
index++;
stackDepth--;
sawText = false;
needToBreak = true;
}
else
{
throw new XmlSyntaxException("XMLSyntax_ExpectedCloseBracket");
}
}
else
{
throw new XmlSyntaxException(_t.LineNo);
}
break;
case Tokenizer.dash:
default:
throw new XmlSyntaxException(_t.LineNo);
}
if (needToBreak)
{
needToBreak = false;
needToPop = false;
break;
}
else
{
needToPop = true;
}
}
if (needToPop)
{
index++;
stackDepth--;
sawText = false;
}
else if (i == -1 && (stackDepth != 1 || !createdNode))
{
// This means that we still have items on the stack, but the end of our
// stream has been reached.
throw new XmlSyntaxException("XMLSyntax_UnexpectedEndOfFile");
}
}while (stackDepth > 1);
}
