System.Json.JsonReader.ReadStringLiteral C# (CSharp) Method

		string ReadStringLiteral ()
		{
			if (PeekChar () != '"')
				throw JsonError ("Invalid JSON string literal format");

			ReadChar ();
			vb.Length = 0;
			while (true) {
				int c = ReadChar ();
				if (c < 0)
					throw JsonError ("JSON string is not closed");
				if (c == '"')
					return vb.ToString ();
				else if (c != '\\') {
					vb.Append ((char) c);
					continue;
				}

				// escaped expression
				c = ReadChar ();
				if (c < 0)
					throw JsonError ("Invalid JSON string literal; incomplete escape sequence");
				switch (c) {
				case '"':
				case '\\':
				case '/':
					vb.Append ((char) c);
					break;
				case 'b':
					vb.Append ('\x8');
					break;
				case 'f':
					vb.Append ('\f');
					break;
				case 'n':
					vb.Append ('\n');
					break;
				case 'r':
					vb.Append ('\r');
					break;
				case 't':
					vb.Append ('\t');
					break;
				case 'u':
					ushort cp = 0;
					for (int i = 0; i < 4; i++) {
						cp <<= 4;
						if ((c = ReadChar ()) < 0)
							throw JsonError ("Incomplete unicode character escape literal");
						if ('0' <= c && c <= '9')
							cp += (ushort) (c - '0');
						if ('A' <= c && c <= 'F')
							cp += (ushort) (c - 'A' + 10);
						if ('a' <= c && c <= 'f')
							cp += (ushort) (c - 'a' + 10);
					}
					vb.Append ((char) cp);
					break;
				default:
					throw JsonError ("Invalid JSON string literal; unexpected escape character");
				}
			}
		}