private static string ParseString(char[] json, ref int index, ref bool success)
{
StringBuilder stringBuilder = GetStringBuilder(); //new StringBuilder(2000);
SimpleJsonTool.EatWhitespace(json, ref index);
char c = json[index++];
bool flag = false;
string result;
while (!flag)
{
if (index == json.Length)
{
break;
}
c = json[index++];
if (c == '"')
{
flag = true;
break;
}
if (c == '\\')
{
if (index == json.Length)
{
break;
}
c = json[index++];
if (c == '"')
{
stringBuilder.Append('"');
}
else if (c == '\\')
{
stringBuilder.Append('\\');
}
else if (c == '/')
{
stringBuilder.Append('/');
}
else if (c == 'b')
{
stringBuilder.Append('\b');
}
else if (c == 'f')
{
stringBuilder.Append('\f');
}
else if (c == 'n')
{
stringBuilder.Append('\n');
}
else if (c == 'r')
{
stringBuilder.Append('\r');
}
else if (c == 't')
{
stringBuilder.Append('\t');
}
else if (c == 'u')
{
int num = json.Length - index;
if (num >= 4)
{
uint num2;
if (!(success = uint.TryParse(new string(json, index, 4), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out num2)))
{
result = "";
}
else
{
if (55296u > num2 || num2 > 56319u)
{
stringBuilder.Append(SimpleJsonTool.ConvertFromUtf32((int)num2));
index += 4;
continue;
}
index += 4;
num = json.Length - index;
if (num >= 6)
{
uint num3;
if (new string(json, index, 2) == "\\u" && uint.TryParse(new string(json, index + 2, 4), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out num3))
{
if (56320u <= num3 && num3 <= 57343u)
{
stringBuilder.Append((char)num2);
stringBuilder.Append((char)num3);
index += 6;
continue;
}
}
}
success = false;
result = "";
}
return(result);
}
break;
}
}
else
{
stringBuilder.Append(c);
}
}
if (!flag)
{
success = false;
result = null;
return(result);
}
result = stringBuilder.ToString();
RecycleStringBuilder(stringBuilder);
return(result);
}