System.UriParseComponents.ParseScheme C# (CSharp) Méthode

		private static bool ParseScheme (ParserState state)
		{
			string part = state.remaining;
			
			StringBuilder sb = new StringBuilder ();
			sb.Append (part [0]);
			
			int index;
			for (index = 1; index < part.Length; index++ ) {
				char ch = part [index];
				if (ch != '.' && ch != '-' && ch != '+' && !IsAlpha (ch) && !Char.IsDigit (ch))
					break;
				
				sb.Append (ch);
			}
			
			if (index == 0 || index >= part.Length) {
				if (state.kind == UriKind.Absolute) {
					state.error = "Invalid URI: The format of the URI could not be determined.";
					return false;
				}

				state.elements.isAbsoluteUri = false;
				return state.remaining.Length > 0;
			}

			if (part [index] != ':') {
				if (state.kind == UriKind.Absolute) {
					state.error = "Invalid URI: The URI scheme is not valid.";
					return false;
				}

				state.elements.isAbsoluteUri = false;
				return state.remaining.Length > 0;
			}

			state.elements.scheme = sb.ToString ().ToLowerInvariant ();
			state.remaining = part.Substring (index);

			// Check scheme name characters as specified in RFC2396.
			// Note: different checks in 1.x and 2.0
			if (!Uri.CheckSchemeName (state.elements.scheme)) {
				if (state.kind == UriKind.Absolute) {
					state.error = "Invalid URI: The URI scheme is not valid.";
					return false;
				}

				state.elements.isAbsoluteUri = false;
				return state.remaining.Length > 0;
			}

			return ParseDelimiter (state);
		}