public static JSONNode Parse(string aJSON)
{
Stack <JSONNode> stack = new Stack <JSONNode>();
JSONNode ctx = null;
int i = 0;
var Token = new StringBuilder(32);
string TokenName = "";
bool QuoteMode = false;
while (i < aJSON.Length)
{
switch (aJSON[i])
{
case '{':
if (QuoteMode)
{
Token.Append(aJSON[i]);
break;
}
stack.Push(new JSONClass());
if (ctx != null)
{
TokenName = TokenName.Trim();
if (ctx is JSONArray)
{
ctx.Add(stack.Peek());
}
else if (TokenName != "")
{
ctx.Add(TokenName, stack.Peek());
}
}
TokenName = "";
Token.Length = 0;
ctx = stack.Peek();
break;
case '[':
if (QuoteMode)
{
Token.Append(aJSON[i]);
break;
}
stack.Push(new JSONArray());
if (ctx != null)
{
TokenName = TokenName.Trim();
if (ctx is JSONArray)
{
ctx.Add(stack.Peek());
}
else if (TokenName != "")
{
ctx.Add(TokenName, stack.Peek());
}
}
TokenName = "";
Token.Length = 0;
ctx = stack.Peek();
break;
case '}':
case ']':
if (QuoteMode)
{
Token.Append(aJSON[i]);
break;
}
if (stack.Count == 0)
{
throw new Exception("JSON Parse: Too many closing brackets");
}
stack.Pop();
if (Token.Length != 0)
{
TokenName = TokenName.Trim();
if (ctx is JSONArray)
{
ctx.Add(Token.ToString());
}
else if (TokenName != "")
{
ctx.Add(TokenName, Token.ToString());
}
}
TokenName = "";
Token.Length = 0;
if (stack.Count > 0)
{
ctx = stack.Peek();
}
break;
case ':':
if (QuoteMode)
{
Token.Append(aJSON[i]);
break;
}
TokenName = Token.ToString();
Token.Length = 0;
break;
case '"':
QuoteMode ^= true;
break;
case ',':
if (QuoteMode)
{
Token.Append(aJSON[i]);
break;
}
if (Token.Length != 0)
{
if (ctx is JSONArray)
{
ctx.Add(Token.ToString());
}
else if (TokenName != "")
{
ctx.Add(TokenName, Token.ToString());
}
}
TokenName = "";
Token.Length = 0;
break;
case '\r':
case '\n':
break;
case ' ':
case '\t':
if (QuoteMode)
{
Token.Append(aJSON[i]);
}
break;
case '\\':
++i;
if (QuoteMode)
{
char C = aJSON[i];
switch (C)
{
case 't': Token.Append('\t'); break;
case 'r': Token.Append('\r'); break;
case 'n': Token.Append('\n'); break;
case 'b': Token.Append('\b'); break;
case 'f': Token.Append('\f'); break;
case 'u':
{
string s = aJSON.Substring(i + 1, 4);
Token.Append((char)int.Parse(s, System.Globalization.NumberStyles.AllowHexSpecifier));
i += 4;
break;
}
default: Token.Append(C); break;
}
}
break;
default:
Token.Append(aJSON[i]);
break;
}
++i;
}
if (QuoteMode)
{
throw new Exception("JSON Parse: Quotation marks seems to be messed up.");
}
return(ctx);
}
