System.UriParseComponents.ParseUser C# (CSharp) Méthode

		private static bool ParseUser (ParserState state)
		{
			string part = state.remaining;
			StringBuilder sb = null;

			int index;
			for (index = 0; index < part.Length; index++) {
				char ch = part [index];
				bool isEscapedChar = false;
				var oldIndex = index;

				if (ch == '%'){
					if (!Uri.IsHexEncoding (part, index))
						return false;
					ch = Uri.HexUnescape (part, ref index);
					index--;
					isEscapedChar = true;
				}

				if (!Char.IsLetterOrDigit (ch) && !IsUnreserved (ch) && !IsSubDelim (ch) && ch != ':'){
					if (!isEscapedChar)
						break;

					ch = '%';
					index = oldIndex;
				}

				if (sb == null)
					sb = new StringBuilder ();
				sb.Append (ch);
			}

			if (index + 1 <= part.Length && part [index] == '@') {
				if (state.elements.scheme == Uri.UriSchemeFile) {
					state.error = "Invalid URI: The hostname could not be parsed.";
					return false;
				}

				state.elements.user = sb == null ? "" : sb.ToString ();
				state.remaining = state.remaining.Substring (index + 1);
			}
				
			return state.remaining.Length > 0;
		}