def test_dirent():
dirent = configure.getstruct("struct dirent",
"""
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""",
[("d_reclen", ctypes.c_ushort)])
assert issubclass(dirent, ctypes.Structure)
ssize = (ctypes.sizeof(ctypes.c_long) +
ctypes.sizeof(ctypes.c_int) +
ctypes.sizeof(ctypes.c_ushort) +
32)
extra_padding = (-ssize) % ctypes.alignment(ctypes.c_long)
assert dirent._fields_ == [('_alignment', ctypes.c_long),
('_pad0', ctypes.c_char),
('_pad1', ctypes.c_char),
('_pad2', ctypes.c_char),
('_pad3', ctypes.c_char),
('d_reclen', ctypes.c_ushort),
] + [
('_pad%d' % n, ctypes.c_char)
for n in range(4, 4+32+extra_padding)]
assert ctypes.sizeof(dirent) == ssize + extra_padding
assert ctypes.alignment(dirent) == ctypes.alignment(ctypes.c_long)
def test_dirent():
dirent = configure.getstruct(
"struct dirent", """
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""", [("d_reclen", ctypes.c_ushort)])
assert issubclass(dirent, ctypes.Structure)
ssize = (ctypes.sizeof(ctypes.c_long) + ctypes.sizeof(ctypes.c_int) +
ctypes.sizeof(ctypes.c_ushort) + 32)
extra_padding = (-ssize) % ctypes.alignment(ctypes.c_long)
assert dirent._fields_ == [
('_alignment', ctypes.c_long),
('_pad0', ctypes.c_char),
('_pad1', ctypes.c_char),
('_pad2', ctypes.c_char),
('_pad3', ctypes.c_char),
('d_reclen', ctypes.c_ushort),
] + [('_pad%d' % n, ctypes.c_char)
for n in range(4, 4 + 32 + extra_padding)]
assert ctypes.sizeof(dirent) == ssize + extra_padding
assert ctypes.alignment(dirent) == ctypes.alignment(ctypes.c_long)
def test_array():
dirent = configure.getstruct(
"struct dirent", """
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""", [("d_name", ctypes.c_char * 0)])
assert dirent.d_name.size == 32
def test_array():
dirent = configure.getstruct("struct dirent",
"""
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""",
[("d_name", ctypes.c_char * 0)])
assert dirent.d_name.size == 32
def test_fit_type():
S = configure.getstruct("struct S",
"""
struct S {
signed char c;
unsigned char uc;
short s;
unsigned short us;
int i;
unsigned int ui;
long l;
unsigned long ul;
long long ll;
unsigned long long ull;
float f;
double d;
};
""",
[("c", ctypes.c_int),
("uc", ctypes.c_int),
("s", ctypes.c_uint),
("us", ctypes.c_int),
("i", ctypes.c_int),
("ui", ctypes.c_int),
("l", ctypes.c_int),
("ul", ctypes.c_int),
("ll", ctypes.c_int),
("ull", ctypes.c_int),
("f", ctypes.c_double),
("d", ctypes.c_float)])
assert issubclass(S, ctypes.Structure)
fields = dict(S._fields_)
assert fields["c"] == ctypes.c_byte
assert fields["uc"] == ctypes.c_ubyte
assert fields["s"] == ctypes.c_short
assert fields["us"] == ctypes.c_ushort
assert fields["i"] == ctypes.c_int
assert fields["ui"] == ctypes.c_uint
assert fields["l"] == ctypes.c_long
assert fields["ul"] == ctypes.c_ulong
assert fields["ll"] == ctypes.c_longlong
assert fields["ull"] == ctypes.c_ulonglong
assert fields["f"] == ctypes.c_float
assert fields["d"] == ctypes.c_double
def test_fit_type():
S = configure.getstruct(
"struct S", """
struct S {
signed char c;
unsigned char uc;
short s;
unsigned short us;
int i;
unsigned int ui;
long l;
unsigned long ul;
long long ll;
unsigned long long ull;
float f;
double d;
};
""", [("c", ctypes.c_int),
("uc", ctypes.c_int),
("s", ctypes.c_uint),
("us", ctypes.c_int),
("i", ctypes.c_int),
("ui", ctypes.c_int),
("l", ctypes.c_int),
("ul", ctypes.c_int),
("ll", ctypes.c_int),
("ull", ctypes.c_int),
("f", ctypes.c_double),
("d", ctypes.c_float)])
assert issubclass(S, ctypes.Structure)
fields = dict(S._fields_)
assert fields["c"] == ctypes.c_byte
assert fields["uc"] == ctypes.c_ubyte
assert fields["s"] == ctypes.c_short
assert fields["us"] == ctypes.c_ushort
assert fields["i"] == ctypes.c_int
assert fields["ui"] == ctypes.c_uint
assert fields["l"] == ctypes.c_long
assert fields["ul"] == ctypes.c_ulong
assert fields["ll"] == ctypes.c_longlong
assert fields["ull"] == ctypes.c_ulonglong
assert fields["f"] == ctypes.c_float
assert fields["d"] == ctypes.c_double