public static JsonObject Deserialize(string JSON, int pos)
{
JsonObject RootItem = new JsonObject();
RootItem.Deserialize(JSON, ref pos);
if (RootItem.Childs.Count == 1) //if rootitem has a single child, return this!
return RootItem.Childs.ElementAt(0);
return RootItem; //more than 1 root element? then return them as a collection
}
private void Deserialize(string JSON, ref int pos)
{
JsonObject NewChild = null;
DeserializeMode Mode = DeserializeMode.ReadName;
while (pos < JSON.Length)
{
char c = JSON[pos++];
switch (c)
{
case '[':
case '{': //starting new array or element
if (NewChild == null)
{
NewChild = new JsonObject();
NewChild.Name = Guid.NewGuid().ToString(); //create unique name
}
NewChild.Value = c == '[' ? "JsonArray" : "JsonObject"; //no real value here
NewChild.Deserialize(JSON, ref pos);
_Childs.Add(NewChild.Name, NewChild);
NewChild = null; //done with child
Mode = DeserializeMode.None;
break;
case ',': //about to have name
Mode = DeserializeMode.ReadName;
break;
case ':': //about to have the value
Mode = DeserializeMode.ReadValue;
break;
case '\r':
case '\n':
case ' ': // eat up these characters (spaces, enter, linefeeds, etc)
break;
case '}':
case ']':
return; // we're done with this array or item
default:
//read value, then store it in either the name or value
bool bHadQuote = false;
string ReadString = string.Empty;
pos--; //take 1 step back, start at the beginning
while (pos < JSON.Length)
{
char ch = JSON[pos++];
if (ch == ' ' && ReadString.Length == 0)
{
//eat up leading spaces (do nothing with this)
}
else if (ch == '\"')
{
bHadQuote = !bHadQuote;
if (!bHadQuote)
break; //we're done (just closed quoted string)
}
else if (ch == '\\') //escape character?
{
if (char.TryParse("\\" + JSON[pos++], out ch))
ReadString += ch;
}
else if (!bHadQuote && !char.IsLetterOrDigit(ch))
{
pos--; //take one step back
break; //we're done with this, since this appeared to be something without quotes
}
else
ReadString += ch;
}
//now we have the name/value string, store in whatever we're reading (mode)
switch(Mode)
{
case DeserializeMode.ReadName:
if (ReadString.Length > 0)
{
NewChild = new JsonObject();
NewChild.Name = ReadString;
}
break;
case DeserializeMode.ReadValue:
if (NewChild != null)
{
NewChild.Value = ReadString;
_Childs.Add(NewChild.Name, NewChild);
NewChild = null; //done with current child
}
break;
}
Mode = DeserializeMode.None; // done with current mode, switch back to none
break;
}
}
}
