public int read()

in kerby-common/kerby-util/src/main/java/org/apache/kerby/util/Base64InputStream.java [138:164]

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

    public int read(byte[] b, int offset, int len) throws IOException {
        if (b == null) {
            throw new NullPointerException();
        } else if (offset < 0 || len < 0) {
            throw new IndexOutOfBoundsException();
        } else if (offset > b.length || offset + len > b.length) {
            throw new IndexOutOfBoundsException();
        } else if (len == 0) {
            return 0;
        } else {
            if (!base64.hasData()) {
                byte[] buf = new byte[doEncode ? 4096 : 8192];
                int c = in.read(buf);
                // A little optimization to avoid System.arraycopy()
                // when possible.
                if (c > 0 && b.length == len) {
                    base64.setInitialBuffer(b, offset, len);
                }
                if (doEncode) {
                    base64.encode(buf, 0, c);
                } else {
                    base64.decode(buf, 0, c);
                }
            }
            return base64.readResults(b, offset, len);
        }
    }