private static boolean isGMTish()

in freemarker-core/src/main/java/freemarker/template/utility/DateUtil.java [155:196]

• 40 lines of code
• 25 McCabe index (conditional complexity)

    private static boolean isGMTish(String name) {
        if (name.length() < 3) {
            return false;
        }
        char c1 = name.charAt(0);
        char c2 = name.charAt(1);
        char c3 = name.charAt(2);
        if (
                !(
                       (c1 == 'G' || c1 == 'g')
                    && (c2 == 'M' || c2 == 'm')
                    && (c3 == 'T' || c3 == 't')
                )
                &&
                !(
                       (c1 == 'U' || c1 == 'u')
                    && (c2 == 'T' || c2 == 't')
                    && (c3 == 'C' || c3 == 'c')
                )
                &&
                !(
                       (c1 == 'U' || c1 == 'u')
                    && (c2 == 'T' || c2 == 't')
                    && (c3 == '1')
                )
                ) {
            return false;
        }
        
        if (name.length() == 3) {
            return true;
        }
        
        String offset = name.substring(3);
        if (offset.startsWith("+")) {
            return offset.equals("+0") || offset.equals("+00")
                    || offset.equals("+00:00");
        } else {
            return offset.equals("-0") || offset.equals("-00")
            || offset.equals("-00:00");
        }
    }