static int lastIndexOf()

in src/main/java/org/apache/commons/lang3/CharSequenceUtils.java [248:284]

34 lines of code
12 McCabe index (conditional complexity)


    static int lastIndexOf(final CharSequence cs, final int searchChar, int start) {
        if (cs instanceof String) {
            return ((String) cs).lastIndexOf(searchChar, start);
        }
        final int sz = cs.length();
        if (start < 0) {
            return NOT_FOUND;
        }
        if (start >= sz) {
            start = sz - 1;
        }
        if (searchChar < Character.MIN_SUPPLEMENTARY_CODE_POINT) {
            for (int i = start; i >= 0; --i) {
                if (cs.charAt(i) == searchChar) {
                    return i;
                }
            }
            return NOT_FOUND;
        }
        //supplementary characters (LANG1300)
        //NOTE - we must do a forward traversal for this to avoid duplicating code points
        if (searchChar <= Character.MAX_CODE_POINT) {
            final char[] chars = Character.toChars(searchChar);
            //make sure it's not the last index
            if (start == sz - 1) {
                return NOT_FOUND;
            }
            for (int i = start; i >= 0; i--) {
                final char high = cs.charAt(i);
                final char low = cs.charAt(i + 1);
                if (chars[0] == high && chars[1] == low) {
                    return i;
                }
            }
        }
        return NOT_FOUND;
    }