def test_struct_pack_uses_List(self):
# suppose we have a list of ints...
ints = struct.pack("=IIII", *range(4))
# Unpacker wants a cffi.cdata
cffi_ints = xcffib.ffi.new('char[]', ints)
l = xcffib.List(xcffib.CffiUnpacker(cffi_ints), "I", count=4)
ints2 = struct.pack("=IIII", *l)
# after packing and unpacking, we should still have those ints
assert ints == ints2
def test_union_pack(self):
data = struct.pack("=" + ("b" * 20), *range(20))
cffi_data = xcffib.ffi.new('char[]', data)
cm = xcffib.xproto.ClientMessageData(xcffib.CffiUnpacker(cffi_data))
for actual, expected in zip(range(20), cm.data8):
assert actual == expected, actual
assert cm.data32[0] == 0x03020100
assert cm.data32[1] == 0x07060504
assert cm.data32[2] == 0x0b0a0908
def test_union_pack(self):
data = struct.pack("=" + ("b" * 20), *range(20))
cffi_data = xcffib.ffi.new('char[]', data)
cm = xcffib.xproto.ClientMessageData(xcffib.CffiUnpacker(cffi_data))
for actual, expected in zip(range(20), cm.data8):
assert actual == expected, actual
if sys.byteorder == "little":
assert cm.data32[0] == 0x03020100
assert cm.data32[1] == 0x07060504
assert cm.data32[2] == 0x0b0a0908
elif sys.byteorder == "big":
assert cm.data32[0] == 0x00010203
assert cm.data32[1] == 0x04050607
assert cm.data32[2] == 0x08090a0b
else:
raise Exception("unknown byte order?")