private static bool FromJson(string s, bool canThrowException, out object result, out string remain)
{
try
{
s = s.TrimStart();
if (s == "")
{
throw new Exception("Empty value");
}
if (s[0] == '[')
{
s = s.Substring(1).TrimStart();
Json a = new Json();
a.InitAsArray();
for (;;)
{
if (s[0] == ']')
{
break;
}
object v;
FromJson(s, canThrowException, out v, out s);
a.Append(v);
s = s.TrimStart();
if (s[0] == ',')
{
s = s.Substring(1).TrimStart();
}
}
result = a;
remain = s.Substring(1).TrimStart();
return(true);
}
else if (s[0] == '{')
{
s = s.Substring(1).TrimStart();
Json a = new Json();
a.InitAsDictionary();
for (;;)
{
if (s[0] == '}')
{
break;
}
object k;
FromJson(s, canThrowException, out k, out s);
s = s.TrimStart();
if (s[0] == ':')
{
s = s.Substring(1).TrimStart();
object v;
FromJson(s, canThrowException, out v, out s);
a.SetKey(k as string, v);
s = s.TrimStart();
if (s[0] == ',')
{
s = s.Substring(1).TrimStart();
}
}
else
{
throw new Exception("Syntax error");
}
}
result = a;
remain = s.Substring(1).TrimStart();
return(true);
}
else
{
// Direct value
bool inQuote = false;
int i = 0;
for (i = 0; i < s.Length + 1; i++)
{
char ch = (char)0;
if (i < s.Length)
{
ch = s[i];
}
if (inQuote)
{
if ((ch == '\"') && ((i == 0) || (s[i - 1] != '\\')))
{
inQuote = false;
}
}
else
{
if ((ch == '\"') && ((i == 0) || (s[i - 1] != '\\')))
{
inQuote = true;
}
else if ((ch == (char)0) ||
(ch == ',') ||
(ch == ':') ||
(ch == '}') ||
(ch == ']'))
{
// Valore singolo
string value = s.Substring(0, i).Trim();
if ((value.StartsWith("\"")) && (value.EndsWith("\"")))
{
result = DecodeString(value.Substring(1, value.Length - 2));
remain = s.Substring(i);
return(true);
}
if (value == "null")
{
result = null;
remain = s.Substring(i);
return(true);
}
if (value == "true")
{
result = true;
remain = s.Substring(i);
return(true);
}
if (value == "false")
{
result = false;
remain = s.Substring(i);
return(true);
}
int dI = 0;
if (int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out dI))
{
result = dI;
remain = s.Substring(i);
return(true);
}
double dD = 0;
if (double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out dD))
{
result = dD;
remain = s.Substring(i);
return(true);
}
throw new Exception("Cannot detect type of value '" + value + "'");
}
}
}
throw new Exception("Syntax error");
}
}
catch (Exception e)
{
if (canThrowException)
{
throw new Exception("JsonParser:" + e.Message);
}
}
result = null;
remain = s;
return(false);
}
