private PListValue ReadValue()
{
while (token != null)
{
if (token.Type == LexemType.Delimiter)
{
switch (token.Value)
{
case ("{"):
return(ParseDict());
case ("["):
return(ParseIndexedDict());
case ("("):
return(ParseTuple());
default:
throw new Exception(String.Format("Unexpected token {0}", token));
}
}
else if (token.Type == LexemType.String)
{
PListString str = new PListString(token.Value);
Next();
return(str);
}
Next();
}
throw new Exception("error");
}
private PListNode ReadNode()
{
if (token.Type != LexemType.String)
{
throw new Exception("Node key expected");
}
PListString key = (PListString)ReadValue();
List <PListAttribute> Attrs = null;
if (token.Value == "{")
{
Attrs = ReadAttributes();
}
if (token.Value != "=")
{
throw new Exception("'=' expected");
}
Next();
PListValue val = null;
if (token.Value != ";")
{
val = ReadValue();
if (token.Value != ";")
{
throw new Exception("';' expected");
}
Next();
}
return(new PListNode(key, val)
{
Attributes = Attrs
});
}
private PListValue ParseTuple()
{
PListTuple tuple = new PListTuple();
Next();
while (token != null)
{
if (token.Value == ")")
{
Next();
break;
}
PListString strVal = (PListString)ReadValue();
tuple.Items.Add(strVal);
if (token.Value == ",")
{
Next();
}
}
return(tuple);
}
private PListAttribute ReadAttribute()
{
if (token.Type != LexemType.String)
{
throw new Exception("Attribute key expected");
}
PListString key = (PListString)ReadValue();
if (token.Value != "=")
{
throw new Exception("'=' expected");
}
Next();
PListValue val = ReadValue();
if (val is PListString)
{
return(new PListAttribute(key, val as PListString));
}
else
{
throw new Exception("invalid attribute value");
}
}
public PListAttribute(PListString key, PListString value)
{
this.Key = key;
this.Value = value;
}
public PListNode(PListString key, PListValue val)
{
Key = key;
Value = val;
}