static boolean regionMatches()

in src/main/java/org/apache/commons/codec/binary/CharSequenceUtils.java [54:78]

• 24 lines of code
• 8 McCabe index (conditional complexity)

    static boolean regionMatches(final CharSequence cs, final boolean ignoreCase, final int thisStart,
            final CharSequence substring, final int start, final int length) {
        if (cs instanceof String && substring instanceof String) {
            return ((String) cs).regionMatches(ignoreCase, thisStart, (String) substring, start, length);
        }
        int index1 = thisStart;
        int index2 = start;
        int tmpLen = length;
        while (tmpLen-- > 0) {
            final char c1 = cs.charAt(index1++);
            final char c2 = substring.charAt(index2++);
            if (c1 == c2) {
                continue;
            }
            if (!ignoreCase) {
                return false;
            }
            // The same check as in String.regionMatches():
            if (Character.toUpperCase(c1) != Character.toUpperCase(c2) &&
                    Character.toLowerCase(c1) != Character.toLowerCase(c2)) {
                return false;
            }
        }
        return true;
    }