|
private GetRequiredSizes ( |
||
| stream | ||
| index | int | |
| return | void | |
private void GetRequiredSizes( TokenizerStream stream, ref int index )
{
//
// Iteratively collect stuff up until the next end-tag.
// We've already seen the open-tag.
//
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 (_t.LineNo, Environment.GetResourceString( "XMLSyntax_UnexpectedEndOfFile" ));
else
break;
}
if (i != Tokenizer.ket)
{
throw new XmlSyntaxException (_t.LineNo, Environment.GetResourceString( "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 (_t.LineNo, Environment.GetResourceString( "XMLSyntax_ExpectedSlashOrString" ));
}
break ;
case Tokenizer.equals:
sawEquals = true;
break;
case Tokenizer.ket:
if (intag)
{
intag = false;
continue;
}
else
{
throw new XmlSyntaxException (_t.LineNo, Environment.GetResourceString( "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 (_t.LineNo, Environment.GetResourceString( "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 (_t.LineNo, Environment.GetResourceString( "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( _t.LineNo, Environment.GetResourceString( "XMLSyntax_UnexpectedEndOfFile" ));
}
}
while (stackDepth > 1);
}
