HtmlKit.HtmlTokenizer.ReadCharacterReferenceInAttributeValue C# (CSharp) Method

		HtmlToken ReadCharacterReferenceInAttributeValue ()
		{
			char additionalAllowedCharacter = quote == '\0' ? '>' : quote;
			int nc = Peek ();
			bool consume;
			char c;

			if (nc == -1) {
				TokenizerState = HtmlTokenizerState.EndOfFile;
				data.Append ('&');
				name.Length = 0;

				return EmitDataToken (false);
			}

			c = (char) nc;

			switch (c) {
			case '\t': case '\r': case '\n': case '\f': case ' ': case '<': case '&':
				// no character is consumed, emit '&'
				data.Append ('&');
				name.Append ('&');
				consume = false;
				break;
			default:
				if (c == additionalAllowedCharacter) {
					// this is not a character reference, nothing is consumed
					data.Append ('&');
					name.Append ('&');
					consume = false;
					break;
				}

				entity.Push ('&');

				while (entity.Push (c)) {
					Read ();

					if ((nc = Peek ()) == -1) {
						TokenizerState = HtmlTokenizerState.EndOfFile;
						data.Append (entity.GetPushedInput ());
						entity.Reset ();

						return EmitDataToken (false);
					}

					c = (char) nc;
				}

				var pushed = entity.GetPushedInput ();
				string value;

				if (c == '=' || IsAlphaNumeric (c))
					value = pushed;
				else
					value = entity.GetValue ();

				data.Append (pushed);
				name.Append (value);
				consume = c == ';';
				entity.Reset ();
				break;
			}

			if (quote == '\0')
				TokenizerState = HtmlTokenizerState.AttributeValueUnquoted;
			else
				TokenizerState = HtmlTokenizerState.AttributeValueQuoted;

			if (consume)
				Read ();

			return null;
		}