public static boolean contentEquals()

in src/main/java/org/apache/commons/io/IOUtils.java [899:944]
41 lines of code
15 McCabe index (conditional complexity)

    public static boolean contentEquals(final InputStream input1, final InputStream input2) throws IOException {
        // Before making any changes, please test with
        // org.apache.commons.io.jmh.IOUtilsContentEqualsInputStreamsBenchmark
        if (input1 == input2) {
            return true;
        }
        if (input1 == null || input2 == null) {
            return false;
        }

        // reuse one
        final byte[] array1 = getScratchByteArray();
        // allocate another
        final byte[] array2 = byteArray();
        int pos1;
        int pos2;
        int count1;
        int count2;
        while (true) {
            pos1 = 0;
            pos2 = 0;
            for (int index = 0; index < DEFAULT_BUFFER_SIZE; index++) {
                if (pos1 == index) {
                    do {
                        count1 = input1.read(array1, pos1, DEFAULT_BUFFER_SIZE - pos1);
                    } while (count1 == 0);
                    if (count1 == EOF) {
                        return pos2 == index && input2.read() == EOF;
                    }
                    pos1 += count1;
                }
                if (pos2 == index) {
                    do {
                        count2 = input2.read(array2, pos2, DEFAULT_BUFFER_SIZE - pos2);
                    } while (count2 == 0);
                    if (count2 == EOF) {
                        return pos1 == index && input1.read() == EOF;
                    }
                    pos2 += count2;
                }
                if (array1[index] != array2[index]) {
                    return false;
                }
            }
        }
    }