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import py, sys
import subprocess
from cffi import FFI
from cffi.backend_ctypes import CTypesBackend
SOURCE = """\
#include <errno.h>
int test_getting_errno(void) {
errno = 123;
return -1;
}
int test_setting_errno(void) {
return errno;
}
int my_array[7] = {0, 1, 2, 3, 4, 5, 6};
"""
class TestOwnLib(object):
Backend = CTypesBackend
def setup_class(cls):
if sys.platform == 'win32':
return
from testing.udir import udir
udir.join('testownlib.c').write(SOURCE)
subprocess.check_call(
'gcc testownlib.c -shared -fPIC -o testownlib.so',
cwd=str(udir), shell=True)
cls.module = str(udir.join('testownlib.so'))
def test_getting_errno(self):
if sys.platform == 'win32':
py.test.skip("fix the auto-generation of the tiny test lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int test_getting_errno(void);
""")
ownlib = ffi.dlopen(self.module)
res = ownlib.test_getting_errno()
assert res == -1
assert ffi.errno == 123
def test_setting_errno(self):
if sys.platform == 'win32':
py.test.skip("fix the auto-generation of the tiny test lib")
if self.Backend is CTypesBackend and '__pypy__' in sys.modules:
py.test.skip("XXX errno issue with ctypes on pypy?")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int test_setting_errno(void);
""")
ownlib = ffi.dlopen(self.module)
ffi.errno = 42
res = ownlib.test_setting_errno()
assert res == 42
assert ffi.errno == 42
def test_my_array_7(self):
if sys.platform == 'win32':
py.test.skip("fix the auto-generation of the tiny test lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int my_array[7];
""")
ownlib = ffi.dlopen(self.module)
for i in range(7):
assert ownlib.my_array[i] == i
assert len(ownlib.my_array) == 7
if self.Backend is CTypesBackend:
py.test.skip("not supported by the ctypes backend")
ownlib.my_array = list(range(10, 17))
for i in range(7):
assert ownlib.my_array[i] == 10 + i
ownlib.my_array = list(range(7))
for i in range(7):
assert ownlib.my_array[i] == i
def test_my_array_no_length(self):
if sys.platform == 'win32':
py.test.skip("fix the auto-generation of the tiny test lib")
if self.Backend is CTypesBackend:
py.test.skip("not supported by the ctypes backend")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int my_array[];
""")
ownlib = ffi.dlopen(self.module)
for i in range(7):
assert ownlib.my_array[i] == i
py.test.raises(TypeError, len, ownlib.my_array)
ownlib.my_array = list(range(10, 17))
for i in range(7):
assert ownlib.my_array[i] == 10 + i
ownlib.my_array = list(range(7))
for i in range(7):
assert ownlib.my_array[i] == i
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