internal static JsonObject Parse(string str, ref int position)
{
JsonString.EatSpaces(str, ref position);
if (position >= str.Length)
{
return(null);
}
if (str[position] != '{')
{
throw new JsonParseException(str, position);
}
JsonObject jsonObject = new JsonObject();
// Read all the pairs
bool continueReading = true;
// Read starting '{'
position++;
while (continueReading == true)
{
JsonString.EatSpaces(str, ref position);
if (str[position] != '}')
{
// Read string
JsonString jsonString = JsonString.Parse(str, ref position);
string key = jsonString.Value;
// Read seperator ':'
JsonString.EatSpaces(str, ref position);
if (str[position] != ':')
{
throw new JsonParseException(str, position);
}
position++;
// Read value
JsonValue value = ParseValue(str, ref position);
jsonObject.Add(key, value);
}
JsonString.EatSpaces(str, ref position);
if (str[position] == '}')
{
continueReading = false;
}
else if (str[position] != ',')
{
throw new JsonParseException(str, position);
}
// Skip "," between pair of items
position++;
}
return(jsonObject);
}
/// <summary>
/// Parses the JSON value into the JsonValue object
/// </summary>
/// <param name="str">The string to parse</param>
/// <param name="position">The current position</param>
/// <returns>The JsonValue if parsed, null otherwise.</returns>
protected static JsonValue ParseValue(string str, ref int position)
{
JsonString.EatSpaces(str, ref position);
char ch = str[position];
// JsonString
if (ch == '\"')
{
return(JsonString.Parse(str, ref position));
}
// JsonObject
else if (ch == '{')
{
return(JsonObject.Parse(str, ref position));
}
// JsonArray
else if (ch == '[')
{
return(JsonArray.Parse(str, ref position));
}
// JsonNumber
else if (JsonNumber.IsNumberPart(ch))
{
return(JsonNumber.Parse(str, ref position));
}
// 'null'
else if ((str.Length > position + 4) &&
(str.Substring(position, 4).Equals("null", StringComparison.InvariantCultureIgnoreCase)))
{
position += 4;
return(null);
}
// 'true'
else if ((str.Length > position + 4) &&
(str.Substring(position, 4).Equals("true", StringComparison.InvariantCultureIgnoreCase)))
{
position += 4;
return(new JsonBoolean(true));
}
// 'false'
else if ((str.Length > position + 5) &&
(str.Substring(position, 5).Equals("false", StringComparison.InvariantCultureIgnoreCase)))
{
position += 5;
return(new JsonBoolean(false));
}
else
{
throw new JsonParseException(str, position);
}
}
internal static JsonNumber Parse(string str, ref int position)
{
double value;
JsonString.EatSpaces(str, ref position);
int startPos = position;
while (IsNumberPart(str[position]))
{
position++;
}
value = double.Parse(str.Substring(startPos, position - startPos));
return(new JsonNumber(value));
}