public static XDoc Parse(string input)
{
var xmlParser = new XmlParser(input);
XElem root = null;
xmlParser.ReadElement(ref root);
return(new XDoc(root));
}
internal void AddChild(XElem node)
{
if (this.Children == null)
{
this.Children = new XElemList();
}
this.Children.Add(node);
}
public XDoc(XElem root)
{
this.rootElem = root;
}
public void ReadElement(ref XElem root)
{
int posSpace = 0;
int posNameEnd = 0;
XElem node;
while (currPos < this.inputString.Length)
{
switch (this.inputString[currPos])
{
case '<': // Start of Element or end of long Element
if (this.inputString[currPos + 1] == '/')
{
// Check for end of long Element
if (this.inputString.Substring(currPos, root.Name.Length + 3) == "</" + root.Name + ">")
{
// long tag form element close
currPos = currPos + (root.Name.Length + 3);
return;
}
throw new InvalidOperationException("Unmatched elements at " + currPos + ". Expected '" + root.Name + "', found '" + this.inputString.Substring(currPos, 10));
}
else
{
// Start of Element
if (this.inputString[currPos + 1] == '?')
{
// Skip Xml declaration
posNameEnd = this.inputString.IndexOf(">", currPos);
currPos = currPos + posNameEnd;
}
else
{
node = new XElem();
posNameEnd = this.inputString.IndexOf(">", currPos);
posSpace = this.inputString.IndexOf(" ", currPos);
// If there is a space between opening and the closing bracket...
if ((posSpace > 0) && (posSpace < posNameEnd))
{
// ... then attributes are present, so read them
int off = 0;
node.Name = this.inputString.Substring(currPos + 1, posSpace - currPos - 1);
currPos = posSpace + 1;
if (this.inputString[posNameEnd - 1] == '/')
{
// Account for short form
off = 1;
}
node.Attributes = ReadAttributes(this.inputString.Substring(currPos, posNameEnd - currPos - off));
currPos = posNameEnd + 1;
}
else
{
// .. otherwise no attributes are present
node.Name = this.inputString.Substring(currPos + 1, posNameEnd - currPos - 1);
currPos = posNameEnd + 1;
node.Attributes = null;
}
// Did we just read the root node?
if (root == null)
{
// Yes, so set.
root = node;
}
else
{
// No, so add as child to passed in node.
root.AddChild(node);
}
// If we are not a shortform, recurse down to read the next element.
if (this.inputString[posNameEnd - 1] != '/')
{
// Not a shortform tag
ReadElement(ref node);
}
}
}
break;
case '/':
// Single tag element closing
if (this.inputString[currPos + 1] == '>')
{
currPos = currPos + 2;
return;
}
else
{
currPos = currPos + 1;
}
break;
default:
currPos = currPos + 1;
break;
}
}
}
internal void Add(XElem node)
{
this.contents.Add(node);
}
