public object ParseSubtree()
{
IList <object> l = null;
IDictionary <string, object> d = null;
string rv;
object result = null;
switch (_state)
{
case -2:
return(null);
case -1:
if (!Read())
{
_pc.Expecting();
}
return(ParseSubtree());
case 0:
result = Value;
break;
case 1: // key
rv = Value as string;
if (!Read())
{
_pc.Expecting();
}
result = new KeyValuePair <string, object>(rv, ParseSubtree());
break;
case 2: // begin array
l = new JsonArray();
while (Read() && 3 != _state)
{
l.Add(ParseSubtree());
}
result = l;
break;
case 3: // end array
result = null;
break;
case 4: // begin object
d = new JsonObject();
while (Read() && 5 != _state) // not end object
{
KeyValuePair <string, object> kvp = (KeyValuePair <string, object>)ParseSubtree();
d.Add(kvp.Key, kvp.Value);
}
result = d;
break;
case 5:
result = null;
break;
default:
throw new InvalidProgramException("Unhandled state");
}
return(result);
}
private static object ParseValue(StringReader stringReader)
{
while (stringReader.Peek() == ' ' || stringReader.Peek() == '\r' || stringReader.Peek() == '\n')
{
stringReader.Read();
}
if (stringReader.Peek() == '\"')
{
stringReader.Read();
StringBuilder stringBuilder = new StringBuilder();
while (stringReader.Peek() != -1)
{
if (stringReader.Peek() == '\\')
{
stringBuilder.Append((char)stringReader.Read());
stringBuilder.Append((char)stringReader.Read());
}
else if (stringReader.Peek() == '\"')
{
string value = stringBuilder.ToString();
while (stringReader.Peek() != ',' && stringReader.Peek() != '}' && stringReader.Peek() != ']')
{
stringReader.Read();
}
if (stringReader.Peek() == ',')
{
stringReader.Read();
}
return(value);
}
else
{
stringBuilder.Append((char)stringReader.Read());
}
}
return(stringBuilder.ToString());
}
else if (stringReader.Peek() == '{')
{
JsonObject jsonObject = ParseObject(stringReader);
while (stringReader.Peek() != -1 && stringReader.Read() != ',')
{
;
}
return(jsonObject);
}
else if (stringReader.Peek() == '[')
{
JsonArray jsonArray = ParseArray(stringReader);
while (stringReader.Peek() != -1 && stringReader.Read() != ',')
{
;
}
return(jsonArray);
}
else
{
StringBuilder stringBuilder = new StringBuilder();
while (stringReader.Peek() != -1)
{
if (stringReader.Peek() == '\\')
{
stringBuilder.Append((char)stringReader.Read());
stringBuilder.Append((char)stringReader.Read());
}
else if (stringReader.Peek() == ',')
{
string value = stringBuilder.ToString();
stringReader.Read();
return(ToValue(value));
}
else if (stringReader.Peek() == '}' || stringReader.Peek() == ']')
{
return(ToValue(stringBuilder.ToString()));
}
else
{
stringBuilder.Append((char)stringReader.Read());
}
}
return(stringBuilder.ToString());
}
}
