test_c.py 文件源码

def test_memmove():
    Short = new_primitive_type("short")
    ShortA = new_array_type(new_pointer_type(Short), None)
    Char = new_primitive_type("char")
    CharA = new_array_type(new_pointer_type(Char), None)
    p = newp(ShortA, [-1234, -2345, -3456, -4567, -5678])
    memmove(p, p + 1, 4)
    assert list(p) == [-2345, -3456, -3456, -4567, -5678]
    p[2] = 999
    memmove(p + 2, p, 6)
    assert list(p) == [-2345, -3456, -2345, -3456, 999]
    memmove(p + 4, newp(CharA, b"\x71\x72"), 2)
    if sys.byteorder == 'little':
        assert list(p) == [-2345, -3456, -2345, -3456, 0x7271]
    else:
        assert list(p) == [-2345, -3456, -2345, -3456, 0x7172]