internal static string ParseString(StringReader reader)
{
string str = "";
Json.ReadWhitespace(reader);
if (reader.Read() != '\"')
{
return(null);
}
while (reader.Peek() != '\"')
{
int raw = reader.Read();
if (raw == -1)
{
return(null);
}
char c = (char)raw;
if (c == '\\')
{
if (reader.Peek() == -1)
{
return(null);
}
char special = (char)reader.Read();
if (special == '\'' || special == '\"' || special == '\\')
{
str += special;
}
else
{
str += c;
}
}
else
{
str += c;
}
if (reader.Peek() == -1)
{
return(null);
}
}
reader.Read(); //Discard last quote
return(str);
}
internal static JsonArray Parse(StringReader reader)
{
Json.ReadWhitespace(reader);
if (reader.Read() != '[')
{
return(null);
}
JsonArray array = new JsonArray();
Json.ReadWhitespace(reader);
while ((reader.Peek() != ']') && (reader.Peek() != -1))
{
JsonValue value = Json.ParseValue(reader);
if (value.isEmpty)
{
return(null);
}
array.Values.Add(value.Value);
Json.ReadWhitespace(reader);
if (reader.Peek() == ',')
{
reader.Read(); //Discard separator
Json.ReadWhitespace(reader);
if (reader.Peek() == ']' || reader.Peek() == -1)
{
return(null);
}
}
Json.ReadWhitespace(reader); //Prepare for next loop
}
Json.ReadWhitespace(reader);
if (reader.Read() != ']')
{
return(null);
}
else
{
return(array);
}
}
private static bool checkForNull(StringReader reader)
{
Json.ReadWhitespace(reader);
if (reader.Peek() == 'n' || reader.Peek() == 'N')
{
reader.Read();
if (reader.Peek() == 'u' || reader.Peek() == 'U')
{
reader.Read();
if (reader.Peek() == 'l' || reader.Peek() == 'L')
{
reader.Read();
if (reader.Peek() == 'l' || reader.Peek() == 'L')
{
reader.Read();
return(true);
}
}
}
}
return(false);
}
internal static JsonValue ParseValue(StringReader reader)
{
Json.ReadWhitespace(reader);
if (reader.Peek() == '{')
{
return(new JsonValue(false, JsonObject.Parse(reader)));
}
else if (reader.Peek() == '[')
{
return(new JsonValue(false, JsonArray.Parse(reader)));
}
else if (reader.Peek() == '\"')
{
string str = Json.ParseString(reader);
if (str == null)
{
return(new JsonValue(true));
}
else
{
return(new JsonValue(false, str));
}
}
else if (reader.Peek() == -1)
{
return(new JsonValue(true));
}
else
{
if ((reader.Peek() == 'n') || (reader.Peek() == 'N'))
{
if (checkForNull(reader))
{
return(new JsonValue(false, null));
}
else
{
return(new JsonValue(true));
}
}
else if ((reader.Peek() == 't') || (reader.Peek() == 'T') || (reader.Peek() == 'f') || (reader.Peek() == 'F'))
{
string str = "";
for (int i = 0; i < "true".Length; i++)
{
str += (char)reader.Read();
}
bool b;
if (bool.TryParse(str, out b))
{
return(new JsonValue(false, b));
}
str += (char)reader.Read();
if (bool.TryParse(str, out b))
{
return(new JsonValue(false, b));
}
else
{
return(new JsonValue(true));
}
}
string number = "";
while (reader.Peek() == '-' || reader.Peek() == '.' || char.IsDigit((char)reader.Peek()))
{
number += (char)reader.Read();
}
double d;
long lg;
if (long.TryParse(number, out lg))
{
return(new JsonValue(false, lg));
}
else if (double.TryParse(number, out d))
{
return(new JsonValue(false, d));
}
else
{
return(new JsonValue(true));
}
}
}