Method decodeEscaped

ij/src/main/java/ij/util/Tools.java:449–468

Decodes backslash-escaped characters from the String until the character 'delim' is found. With 'delim'=-1, does not search for a delimiter, with 'delim'=(char)-2, (unescaped) whitespace, commas and semicolons are interpreted as delimiters. Also decodes unicode backslash-u???? characters

(String str, char delim)

	 *  whitespace, commas and semicolons are interpreted as delimiters.
	 *  Also decodes unicode backslash-u???? characters */
	public static String decodeEscaped(String str, char delim) {
		StringBuilder sb = new StringBuilder();
		for (int i=0; i<str.length(); i++) {
			char c = str.charAt(i);
			if ((delim == (char)-2 && isDelimiter(c)) || c == delim) break;
			if (c == '\\' && i+1 < str.length()) {    //escaped by backslash
				i++;
				c = str.charAt(i);
				if (c == 'u' && i+4 < str.length())
					try {
						c = (char)Integer.parseInt(str.substring(i+1, i+5), 16);
						i += 4;
					} catch (NumberFormatException e) {}
				else
					c = withBackslash(c);           // decodes backslash-t for tab etc.
			}
			sb.append(c);
		}
		return sb.toString();
	}

	private static boolean isDelimiter(char c) {
		return Character.isWhitespace(c) || c==',' || c==';';