cimport cython

from cython cimport typeof

from libc.string cimport const_char, const_uchar

@cython.test_assert_path_exists(

    "//NameNode[@name = 'st' and @type.is_string = True]",

    "//NameNode[@name = 'ust' and @type.is_string = True]",

    "//NameNode[@name = 'my_st' and @type.is_string = True]",

    "//NameNode[@name = 'my_ust' and @type.is_string = True]",

    )

def const_charptrs():

    """

    >>> const_charptrs()

    """

    cdef object obj

    cdef const_char*  st  = b'XYZ'

    cdef const_uchar* ust = <unsigned char*>b'XYZ' # needs cast to unsigned

    assert typeof(st) == "const_char *", typeof(st)

    my_st = st

    assert typeof(my_st) == "const_char *", typeof(my_st)

    obj = my_st

    assert obj == b'XYZ', obj

    assert typeof(ust) == "const_uchar *", typeof(ust)

    my_ust = ust

    assert typeof(my_ust) == "const_uchar *", typeof(my_ust)

    obj = my_ust

    assert obj == b'XYZ', obj

ctypedef char mychar

ctypedef unsigned char myuchar

def const_char_arrays():

    """

    >>> const_char_arrays()

    """

    cdef int i

    cdef object obj

    cdef mychar[4]  st

    cdef myuchar[4] ust

    cdef char ch

    i = 0

    for ch in b'XYZ\0':

        st[i] = ch

        ust[i] = <unsigned char>ch

        i += 1

    assert typeof(st) == "mychar [4]", typeof(st)

    obj = st

    assert obj == b'XYZ', obj

    assert typeof(ust) == "myuchar [4]", typeof(ust)

    obj = ust

    assert obj == b'XYZ', obj