test_match_positions
test_match_positions(buf, set, 128, 64);
test_match_positions(buf, set, 64, 64);
test_match_positions(buf, set, 32, 64);
test_match_positions(buf, set, 16, 64);
test_match_positions(buf, set, 8, 64);
test_match_positions(buf, set, 128, 32);
test_match_positions(buf, set, 64, 32);
test_match_positions(buf, set, 32, 32);
test_match_positions(buf, set, 16, 32);
test_match_positions(buf, set, 8, 32);
test_match_positions(buf, set, 128, 16);
test_match_positions(buf, set, 64, 16);
test_match_positions(buf, set, 32, 16);
test_match_positions(buf, set, 16, 16);
test_match_positions(buf, set, 8, 16);
test_match_positions(buf, set, 128, 8);
test_match_positions(buf, set, 64, 8);
test_match_positions(buf, set, 32, 8);
test_match_positions(buf, set, 16, 8);
test_match_positions(buf, set, 8, 8);