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Diffstat (limited to 'testing/cffi0/backend_tests.py')
| -rw-r--r-- | testing/cffi0/backend_tests.py | 1990 |
1 files changed, 1990 insertions, 0 deletions
diff --git a/testing/cffi0/backend_tests.py b/testing/cffi0/backend_tests.py new file mode 100644 index 0000000..13a4c78 --- /dev/null +++ b/testing/cffi0/backend_tests.py @@ -0,0 +1,1990 @@ +import py +import platform +import sys, ctypes +from cffi import FFI, CDefError, FFIError, VerificationMissing +from testing.support import * + +SIZE_OF_INT = ctypes.sizeof(ctypes.c_int) +SIZE_OF_LONG = ctypes.sizeof(ctypes.c_long) +SIZE_OF_SHORT = ctypes.sizeof(ctypes.c_short) +SIZE_OF_PTR = ctypes.sizeof(ctypes.c_void_p) +SIZE_OF_WCHAR = ctypes.sizeof(ctypes.c_wchar) + +def needs_dlopen_none(): + if sys.platform == 'win32' and sys.version_info >= (3,): + py.test.skip("dlopen(None) cannot work on Windows for Python 3") + + +class BackendTests: + + def test_integer_ranges(self): + ffi = FFI(backend=self.Backend()) + for (c_type, size) in [('char', 1), + ('short', 2), + ('short int', 2), + ('', 4), + ('int', 4), + ('long', SIZE_OF_LONG), + ('long int', SIZE_OF_LONG), + ('long long', 8), + ('long long int', 8), + ]: + for unsigned in [None, False, True]: + c_decl = {None: '', + False: 'signed ', + True: 'unsigned '}[unsigned] + c_type + if c_decl == 'char' or c_decl == '': + continue + self._test_int_type(ffi, c_decl, size, unsigned) + + def test_fixedsize_int(self): + ffi = FFI(backend=self.Backend()) + for size in [1, 2, 4, 8]: + self._test_int_type(ffi, 'int%d_t' % (8*size), size, False) + self._test_int_type(ffi, 'uint%d_t' % (8*size), size, True) + self._test_int_type(ffi, 'intptr_t', SIZE_OF_PTR, False) + self._test_int_type(ffi, 'uintptr_t', SIZE_OF_PTR, True) + self._test_int_type(ffi, 'ptrdiff_t', SIZE_OF_PTR, False) + self._test_int_type(ffi, 'size_t', SIZE_OF_PTR, True) + self._test_int_type(ffi, 'ssize_t', SIZE_OF_PTR, False) + + def _test_int_type(self, ffi, c_decl, size, unsigned): + if unsigned: + min = 0 + max = (1 << (8*size)) - 1 + else: + min = -(1 << (8*size-1)) + max = (1 << (8*size-1)) - 1 + min = int(min) + max = int(max) + p = ffi.cast(c_decl, min) + assert p == min + assert hash(p) == hash(min) + assert bool(p) is bool(min) + assert int(p) == min + p = ffi.cast(c_decl, max) + assert int(p) == max + p = ffi.cast(c_decl, long(max)) + assert int(p) == max + q = ffi.cast(c_decl, min - 1) + assert ffi.typeof(q) is ffi.typeof(p) and int(q) == max + q = ffi.cast(c_decl, long(min - 1)) + assert ffi.typeof(q) is ffi.typeof(p) and int(q) == max + assert q == p + assert int(q) == int(p) + assert hash(q) == hash(p) + c_decl_ptr = '%s *' % c_decl + py.test.raises(OverflowError, ffi.new, c_decl_ptr, min - 1) + py.test.raises(OverflowError, ffi.new, c_decl_ptr, max + 1) + py.test.raises(OverflowError, ffi.new, c_decl_ptr, long(min - 1)) + py.test.raises(OverflowError, ffi.new, c_decl_ptr, long(max + 1)) + assert ffi.new(c_decl_ptr, min)[0] == min + assert ffi.new(c_decl_ptr, max)[0] == max + assert ffi.new(c_decl_ptr, long(min))[0] == min + assert ffi.new(c_decl_ptr, long(max))[0] == max + + def test_new_unsupported_type(self): + ffi = FFI(backend=self.Backend()) + e = py.test.raises(TypeError, ffi.new, "int") + assert str(e.value) == "expected a pointer or array ctype, got 'int'" + + def test_new_single_integer(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *") # similar to ffi.new("int[1]") + assert p[0] == 0 + p[0] = -123 + assert p[0] == -123 + p = ffi.new("int *", -42) + assert p[0] == -42 + assert repr(p) == "<cdata 'int *' owning %d bytes>" % SIZE_OF_INT + + def test_new_array_no_arg(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[10]") + # the object was zero-initialized: + for i in range(10): + assert p[i] == 0 + + def test_array_indexing(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[10]") + p[0] = 42 + p[9] = 43 + assert p[0] == 42 + assert p[9] == 43 + py.test.raises(IndexError, "p[10]") + py.test.raises(IndexError, "p[10] = 44") + py.test.raises(IndexError, "p[-1]") + py.test.raises(IndexError, "p[-1] = 44") + + def test_new_array_args(self): + ffi = FFI(backend=self.Backend()) + # this tries to be closer to C: where we say "int x[5] = {10, 20, ..}" + # then here we must enclose the items in a list + p = ffi.new("int[5]", [10, 20, 30, 40, 50]) + assert p[0] == 10 + assert p[1] == 20 + assert p[2] == 30 + assert p[3] == 40 + assert p[4] == 50 + p = ffi.new("int[4]", [25]) + assert p[0] == 25 + assert p[1] == 0 # follow C convention rather than LuaJIT's + assert p[2] == 0 + assert p[3] == 0 + p = ffi.new("int[4]", [ffi.cast("int", -5)]) + assert p[0] == -5 + assert repr(p) == "<cdata 'int[4]' owning %d bytes>" % (4*SIZE_OF_INT) + + def test_new_array_varsize(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[]", 10) # a single integer is the length + assert p[9] == 0 + py.test.raises(IndexError, "p[10]") + # + py.test.raises(TypeError, ffi.new, "int[]") + # + p = ffi.new("int[]", [-6, -7]) # a list is all the items, like C + assert p[0] == -6 + assert p[1] == -7 + py.test.raises(IndexError, "p[2]") + assert repr(p) == "<cdata 'int[]' owning %d bytes>" % (2*SIZE_OF_INT) + # + p = ffi.new("int[]", 0) + py.test.raises(IndexError, "p[0]") + py.test.raises(ValueError, ffi.new, "int[]", -1) + assert repr(p) == "<cdata 'int[]' owning 0 bytes>" + + def test_pointer_init(self): + ffi = FFI(backend=self.Backend()) + n = ffi.new("int *", 24) + a = ffi.new("int *[10]", [ffi.NULL, ffi.NULL, n, n, ffi.NULL]) + for i in range(10): + if i not in (2, 3): + assert a[i] == ffi.NULL + assert a[2] == a[3] == n + + def test_cannot_cast(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short int[10]") + e = py.test.raises(TypeError, ffi.new, "long int **", a) + msg = str(e.value) + assert "'short[10]'" in msg and "'long *'" in msg + + def test_new_pointer_to_array(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("int[4]", [100, 102, 104, 106]) + p = ffi.new("int **", a) + assert p[0] == ffi.cast("int *", a) + assert p[0][2] == 104 + p = ffi.cast("int *", a) + assert p[0] == 100 + assert p[1] == 102 + assert p[2] == 104 + assert p[3] == 106 + # keepalive: a + + def test_pointer_direct(self): + ffi = FFI(backend=self.Backend()) + p = ffi.cast("int*", 0) + assert p is not None + assert bool(p) is False + assert p == ffi.cast("int*", 0) + assert p != None + assert repr(p) == "<cdata 'int *' NULL>" + a = ffi.new("int[]", [123, 456]) + p = ffi.cast("int*", a) + assert bool(p) is True + assert p == ffi.cast("int*", a) + assert p != ffi.cast("int*", 0) + assert p[0] == 123 + assert p[1] == 456 + + def test_repr(self): + typerepr = self.TypeRepr + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { short a, b, c; };") + p = ffi.cast("short unsigned int", 0) + assert repr(p) == "<cdata 'unsigned short' 0>" + assert repr(ffi.typeof(p)) == typerepr % "unsigned short" + p = ffi.cast("unsigned short int", 0) + assert repr(p) == "<cdata 'unsigned short' 0>" + assert repr(ffi.typeof(p)) == typerepr % "unsigned short" + p = ffi.cast("int*", 0) + assert repr(p) == "<cdata 'int *' NULL>" + assert repr(ffi.typeof(p)) == typerepr % "int *" + # + p = ffi.new("int*") + assert repr(p) == "<cdata 'int *' owning %d bytes>" % SIZE_OF_INT + assert repr(ffi.typeof(p)) == typerepr % "int *" + p = ffi.new("int**") + assert repr(p) == "<cdata 'int * *' owning %d bytes>" % SIZE_OF_PTR + assert repr(ffi.typeof(p)) == typerepr % "int * *" + p = ffi.new("int [2]") + assert repr(p) == "<cdata 'int[2]' owning %d bytes>" % (2*SIZE_OF_INT) + assert repr(ffi.typeof(p)) == typerepr % "int[2]" + p = ffi.new("int*[2][3]") + assert repr(p) == "<cdata 'int *[2][3]' owning %d bytes>" % ( + 6*SIZE_OF_PTR) + assert repr(ffi.typeof(p)) == typerepr % "int *[2][3]" + p = ffi.new("struct foo *") + assert repr(p) == "<cdata 'struct foo *' owning %d bytes>" % ( + 3*SIZE_OF_SHORT) + assert repr(ffi.typeof(p)) == typerepr % "struct foo *" + # + q = ffi.cast("short", -123) + assert repr(q) == "<cdata 'short' -123>" + assert repr(ffi.typeof(q)) == typerepr % "short" + p = ffi.new("int*") + q = ffi.cast("short*", p) + assert repr(q).startswith("<cdata 'short *' 0x") + assert repr(ffi.typeof(q)) == typerepr % "short *" + p = ffi.new("int [2]") + q = ffi.cast("int*", p) + assert repr(q).startswith("<cdata 'int *' 0x") + assert repr(ffi.typeof(q)) == typerepr % "int *" + p = ffi.new("struct foo*") + q = ffi.cast("struct foo *", p) + assert repr(q).startswith("<cdata 'struct foo *' 0x") + assert repr(ffi.typeof(q)) == typerepr % "struct foo *" + prevrepr = repr(q) + q = q[0] + assert repr(q) == prevrepr.replace(' *', ' &') + assert repr(ffi.typeof(q)) == typerepr % "struct foo" + + def test_new_array_of_array(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[3][4]") + p[0][0] = 10 + p[2][3] = 33 + assert p[0][0] == 10 + assert p[2][3] == 33 + py.test.raises(IndexError, "p[1][-1]") + + def test_constructor_array_of_array(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[3][2]", [[10, 11], [12, 13], [14, 15]]) + assert p[2][1] == 15 + + def test_new_array_of_pointer_1(self): + ffi = FFI(backend=self.Backend()) + n = ffi.new("int*", 99) + p = ffi.new("int*[4]") + p[3] = n + a = p[3] + assert repr(a).startswith("<cdata 'int *' 0x") + assert a[0] == 99 + + def test_new_array_of_pointer_2(self): + ffi = FFI(backend=self.Backend()) + n = ffi.new("int[1]", [99]) + p = ffi.new("int*[4]") + p[3] = n + a = p[3] + assert repr(a).startswith("<cdata 'int *' 0x") + assert a[0] == 99 + + def test_char(self): + ffi = FFI(backend=self.Backend()) + assert ffi.new("char*", b"\xff")[0] == b'\xff' + assert ffi.new("char*")[0] == b'\x00' + assert int(ffi.cast("char", 300)) == 300 - 256 + assert not bool(ffi.cast("char", 0)) + assert bool(ffi.cast("char", 1)) + assert bool(ffi.cast("char", 255)) + py.test.raises(TypeError, ffi.new, "char*", 32) + py.test.raises(TypeError, ffi.new, "char*", u+"x") + py.test.raises(TypeError, ffi.new, "char*", b"foo") + # + p = ffi.new("char[]", [b'a', b'b', b'\x9c']) + assert len(p) == 3 + assert p[0] == b'a' + assert p[1] == b'b' + assert p[2] == b'\x9c' + p[0] = b'\xff' + assert p[0] == b'\xff' + p = ffi.new("char[]", b"abcd") + assert len(p) == 5 + assert p[4] == b'\x00' # like in C, with: char[] p = "abcd"; + # + p = ffi.new("char[4]", b"ab") + assert len(p) == 4 + assert [p[i] for i in range(4)] == [b'a', b'b', b'\x00', b'\x00'] + p = ffi.new("char[2]", b"ab") + assert len(p) == 2 + assert [p[i] for i in range(2)] == [b'a', b'b'] + py.test.raises(IndexError, ffi.new, "char[2]", b"abc") + + def check_wchar_t(self, ffi): + try: + ffi.cast("wchar_t", 0) + except NotImplementedError: + py.test.skip("NotImplementedError: wchar_t") + + def test_wchar_t(self): + ffi = FFI(backend=self.Backend()) + self.check_wchar_t(ffi) + assert ffi.new("wchar_t*", u+'x')[0] == u+'x' + assert ffi.new("wchar_t*", u+'\u1234')[0] == u+'\u1234' + if SIZE_OF_WCHAR > 2: + assert ffi.new("wchar_t*", u+'\U00012345')[0] == u+'\U00012345' + else: + py.test.raises(TypeError, ffi.new, "wchar_t*", u+'\U00012345') + assert ffi.new("wchar_t*")[0] == u+'\x00' + assert int(ffi.cast("wchar_t", 300)) == 300 + assert not bool(ffi.cast("wchar_t", 0)) + assert bool(ffi.cast("wchar_t", 1)) + assert bool(ffi.cast("wchar_t", 65535)) + if SIZE_OF_WCHAR > 2: + assert bool(ffi.cast("wchar_t", 65536)) + py.test.raises(TypeError, ffi.new, "wchar_t*", 32) + py.test.raises(TypeError, ffi.new, "wchar_t*", "foo") + # + p = ffi.new("wchar_t[]", [u+'a', u+'b', u+'\u1234']) + assert len(p) == 3 + assert p[0] == u+'a' + assert p[1] == u+'b' and type(p[1]) is unicode + assert p[2] == u+'\u1234' + p[0] = u+'x' + assert p[0] == u+'x' and type(p[0]) is unicode + p[1] = u+'\u1357' + assert p[1] == u+'\u1357' + p = ffi.new("wchar_t[]", u+"abcd") + assert len(p) == 5 + assert p[4] == u+'\x00' + p = ffi.new("wchar_t[]", u+"a\u1234b") + assert len(p) == 4 + assert p[1] == u+'\u1234' + # + p = ffi.new("wchar_t[]", u+'\U00023456') + if SIZE_OF_WCHAR == 2: + assert len(p) == 3 + assert p[0] == u+'\ud84d' + assert p[1] == u+'\udc56' + assert p[2] == u+'\x00' + else: + assert len(p) == 2 + assert p[0] == u+'\U00023456' + assert p[1] == u+'\x00' + # + p = ffi.new("wchar_t[4]", u+"ab") + assert len(p) == 4 + assert [p[i] for i in range(4)] == [u+'a', u+'b', u+'\x00', u+'\x00'] + p = ffi.new("wchar_t[2]", u+"ab") + assert len(p) == 2 + assert [p[i] for i in range(2)] == [u+'a', u+'b'] + py.test.raises(IndexError, ffi.new, "wchar_t[2]", u+"abc") + + def test_none_as_null_doesnt_work(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int*[1]") + assert p[0] is not None + assert p[0] != None + assert p[0] == ffi.NULL + assert repr(p[0]) == "<cdata 'int *' NULL>" + # + n = ffi.new("int*", 99) + p = ffi.new("int*[]", [n]) + assert p[0][0] == 99 + py.test.raises(TypeError, "p[0] = None") + p[0] = ffi.NULL + assert p[0] == ffi.NULL + + def test_float(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("float[]", [-2, -2.5]) + assert p[0] == -2.0 + assert p[1] == -2.5 + p[1] += 17.75 + assert p[1] == 15.25 + # + p = ffi.new("float*", 15.75) + assert p[0] == 15.75 + py.test.raises(TypeError, int, p) + py.test.raises(TypeError, float, p) + p[0] = 0.0 + assert bool(p) is True + # + p = ffi.new("float*", 1.1) + f = p[0] + assert f != 1.1 # because of rounding effect + assert abs(f - 1.1) < 1E-7 + # + INF = 1E200 * 1E200 + assert 1E200 != INF + p[0] = 1E200 + assert p[0] == INF # infinite, not enough precision + + def test_struct_simple(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a; short b, c; };") + s = ffi.new("struct foo*") + assert s.a == s.b == s.c == 0 + s.b = -23 + assert s.b == -23 + py.test.raises(OverflowError, "s.b = 32768") + # + s = ffi.new("struct foo*", [-2, -3]) + assert s.a == -2 + assert s.b == -3 + assert s.c == 0 + py.test.raises((AttributeError, TypeError), "del s.a") + assert repr(s) == "<cdata 'struct foo *' owning %d bytes>" % ( + SIZE_OF_INT + 2 * SIZE_OF_SHORT) + # + py.test.raises(ValueError, ffi.new, "struct foo*", [1, 2, 3, 4]) + + def test_constructor_struct_from_dict(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a; short b, c; };") + s = ffi.new("struct foo*", {'b': 123, 'c': 456}) + assert s.a == 0 + assert s.b == 123 + assert s.c == 456 + py.test.raises(KeyError, ffi.new, "struct foo*", {'d': 456}) + + def test_struct_pointer(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a; short b, c; };") + s = ffi.new("struct foo*") + assert s[0].a == s[0].b == s[0].c == 0 + s[0].b = -23 + assert s[0].b == s.b == -23 + py.test.raises(OverflowError, "s[0].b = -32769") + py.test.raises(IndexError, "s[1]") + + def test_struct_opaque(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(TypeError, ffi.new, "struct baz*") + p = ffi.new("struct baz **") # this works + assert p[0] == ffi.NULL + + def test_pointer_to_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a; short b, c; };") + s = ffi.new("struct foo *") + s.a = -42 + assert s[0].a == -42 + p = ffi.new("struct foo **", s) + assert p[0].a == -42 + assert p[0][0].a == -42 + p[0].a = -43 + assert s.a == -43 + assert s[0].a == -43 + p[0][0].a = -44 + assert s.a == -44 + assert s[0].a == -44 + s.a = -45 + assert p[0].a == -45 + assert p[0][0].a == -45 + s[0].a = -46 + assert p[0].a == -46 + assert p[0][0].a == -46 + + def test_constructor_struct_of_array(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a[2]; char b[3]; };") + s = ffi.new("struct foo *", [[10, 11], [b'a', b'b', b'c']]) + assert s.a[1] == 11 + assert s.b[2] == b'c' + s.b[1] = b'X' + assert s.b[0] == b'a' + assert s.b[1] == b'X' + assert s.b[2] == b'c' + + def test_recursive_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int value; struct foo *next; };") + s = ffi.new("struct foo*") + t = ffi.new("struct foo*") + s.value = 123 + s.next = t + t.value = 456 + assert s.value == 123 + assert s.next.value == 456 + + def test_union_simple(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("union foo { int a; short b, c; };") + u = ffi.new("union foo*") + assert u.a == u.b == u.c == 0 + u.b = -23 + assert u.b == -23 + assert u.a != 0 + py.test.raises(OverflowError, "u.b = 32768") + # + u = ffi.new("union foo*", [-2]) + assert u.a == -2 + py.test.raises((AttributeError, TypeError), "del u.a") + assert repr(u) == "<cdata 'union foo *' owning %d bytes>" % SIZE_OF_INT + + def test_union_opaque(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(TypeError, ffi.new, "union baz *") + u = ffi.new("union baz **") # this works + assert u[0] == ffi.NULL + + def test_union_initializer(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("union foo { char a; int b; };") + py.test.raises(TypeError, ffi.new, "union foo*", b'A') + py.test.raises(TypeError, ffi.new, "union foo*", 5) + py.test.raises(ValueError, ffi.new, "union foo*", [b'A', 5]) + u = ffi.new("union foo*", [b'A']) + assert u.a == b'A' + py.test.raises(TypeError, ffi.new, "union foo*", [1005]) + u = ffi.new("union foo*", {'b': 12345}) + assert u.b == 12345 + u = ffi.new("union foo*", []) + assert u.a == b'\x00' + assert u.b == 0 + + def test_sizeof_type(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct foo { int a; short b, c, d; }; + union foo { int a; short b, c, d; }; + """) + for c_type, expected_size in [ + ('char', 1), + ('unsigned int', 4), + ('char *', SIZE_OF_PTR), + ('int[5]', 20), + ('struct foo', 12), + ('union foo', 4), + ]: + size = ffi.sizeof(c_type) + assert size == expected_size, (size, expected_size, ctype) + + def test_sizeof_cdata(self): + ffi = FFI(backend=self.Backend()) + assert ffi.sizeof(ffi.new("short*")) == SIZE_OF_PTR + assert ffi.sizeof(ffi.cast("short", 123)) == SIZE_OF_SHORT + # + a = ffi.new("int[]", [10, 11, 12, 13, 14]) + assert len(a) == 5 + assert ffi.sizeof(a) == 5 * SIZE_OF_INT + + def test_string_from_char_pointer(self): + ffi = FFI(backend=self.Backend()) + x = ffi.new("char*", b"x") + assert str(x) == repr(x) + assert ffi.string(x) == b"x" + assert ffi.string(ffi.new("char*", b"\x00")) == b"" + py.test.raises(TypeError, ffi.new, "char*", unicode("foo")) + + def test_unicode_from_wchar_pointer(self): + ffi = FFI(backend=self.Backend()) + self.check_wchar_t(ffi) + x = ffi.new("wchar_t*", u+"x") + assert unicode(x) == unicode(repr(x)) + assert ffi.string(x) == u+"x" + assert ffi.string(ffi.new("wchar_t*", u+"\x00")) == u+"" + + def test_string_from_char_array(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("char[]", b"hello.") + p[5] = b'!' + assert ffi.string(p) == b"hello!" + p[6] = b'?' + assert ffi.string(p) == b"hello!?" + p[3] = b'\x00' + assert ffi.string(p) == b"hel" + assert ffi.string(p, 2) == b"he" + py.test.raises(IndexError, "p[7] = b'X'") + # + a = ffi.new("char[]", b"hello\x00world") + assert len(a) == 12 + p = ffi.cast("char *", a) + assert ffi.string(p) == b'hello' + + def test_string_from_wchar_array(self): + ffi = FFI(backend=self.Backend()) + self.check_wchar_t(ffi) + assert ffi.string(ffi.cast("wchar_t", "x")) == u+"x" + assert ffi.string(ffi.cast("wchar_t", u+"x")) == u+"x" + x = ffi.cast("wchar_t", "x") + assert str(x) == repr(x) + assert ffi.string(x) == u+"x" + # + p = ffi.new("wchar_t[]", u+"hello.") + p[5] = u+'!' + assert ffi.string(p) == u+"hello!" + p[6] = u+'\u04d2' + assert ffi.string(p) == u+"hello!\u04d2" + p[3] = u+'\x00' + assert ffi.string(p) == u+"hel" + assert ffi.string(p, 123) == u+"hel" + py.test.raises(IndexError, "p[7] = u+'X'") + # + a = ffi.new("wchar_t[]", u+"hello\x00world") + assert len(a) == 12 + p = ffi.cast("wchar_t *", a) + assert ffi.string(p) == u+'hello' + assert ffi.string(p, 123) == u+'hello' + assert ffi.string(p, 5) == u+'hello' + assert ffi.string(p, 2) == u+'he' + + def test_fetch_const_char_p_field(self): + # 'const' is ignored so far + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { const char *name; };") + t = ffi.new("const char[]", b"testing") + s = ffi.new("struct foo*", [t]) + assert type(s.name) not in (bytes, str, unicode) + assert ffi.string(s.name) == b"testing" + py.test.raises(TypeError, "s.name = None") + s.name = ffi.NULL + assert s.name == ffi.NULL + + def test_fetch_const_wchar_p_field(self): + # 'const' is ignored so far + ffi = FFI(backend=self.Backend()) + self.check_wchar_t(ffi) + ffi.cdef("struct foo { const wchar_t *name; };") + t = ffi.new("const wchar_t[]", u+"testing") + s = ffi.new("struct foo*", [t]) + assert type(s.name) not in (bytes, str, unicode) + assert ffi.string(s.name) == u+"testing" + s.name = ffi.NULL + assert s.name == ffi.NULL + + def test_voidp(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(TypeError, ffi.new, "void*") + p = ffi.new("void **") + assert p[0] == ffi.NULL + a = ffi.new("int[]", [10, 11, 12]) + p = ffi.new("void **", a) + vp = p[0] + py.test.raises(TypeError, "vp[0]") + py.test.raises(TypeError, ffi.new, "short **", a) + # + ffi.cdef("struct foo { void *p; int *q; short *r; };") + s = ffi.new("struct foo *") + s.p = a # works + s.q = a # works + py.test.raises(TypeError, "s.r = a") # fails + b = ffi.cast("int *", a) + s.p = b # works + s.q = b # works + py.test.raises(TypeError, "s.r = b") # fails + + def test_functionptr_simple(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(TypeError, ffi.callback, "int(*)(int)", 0) + def cb(n): + return n + 1 + cb.__qualname__ = 'cb' + p = ffi.callback("int(*)(int)", cb) + res = p(41) # calling an 'int(*)(int)', i.e. a function pointer + assert res == 42 and type(res) is int + res = p(ffi.cast("int", -41)) + assert res == -40 and type(res) is int + assert repr(p).startswith( + "<cdata 'int(*)(int)' calling <function cb at 0x") + assert ffi.typeof(p) is ffi.typeof("int(*)(int)") + q = ffi.new("int(**)(int)", p) + assert repr(q) == "<cdata 'int(* *)(int)' owning %d bytes>" % ( + SIZE_OF_PTR) + py.test.raises(TypeError, "q(43)") + res = q[0](43) + assert res == 44 + q = ffi.cast("int(*)(int)", p) + assert repr(q).startswith("<cdata 'int(*)(int)' 0x") + res = q(45) + assert res == 46 + + def test_functionptr_advanced(self): + ffi = FFI(backend=self.Backend()) + t = ffi.typeof("int(*(*)(int))(int)") + assert repr(t) == self.TypeRepr % "int(*(*)(int))(int)" + + def test_functionptr_voidptr_return(self): + ffi = FFI(backend=self.Backend()) + def cb(): + return ffi.NULL + p = ffi.callback("void*(*)()", cb) + res = p() + assert res is not None + assert res == ffi.NULL + int_ptr = ffi.new('int*') + void_ptr = ffi.cast('void*', int_ptr) + def cb(): + return void_ptr + p = ffi.callback("void*(*)()", cb) + res = p() + assert res == void_ptr + + def test_functionptr_intptr_return(self): + ffi = FFI(backend=self.Backend()) + def cb(): + return ffi.NULL + p = ffi.callback("int*(*)()", cb) + res = p() + assert res == ffi.NULL + int_ptr = ffi.new('int*') + def cb(): + return int_ptr + p = ffi.callback("int*(*)()", cb) + res = p() + assert repr(res).startswith("<cdata 'int *' 0x") + assert res == int_ptr + int_array_ptr = ffi.new('int[1]') + def cb(): + return int_array_ptr + p = ffi.callback("int*(*)()", cb) + res = p() + assert repr(res).startswith("<cdata 'int *' 0x") + assert res == int_array_ptr + + def test_functionptr_void_return(self): + ffi = FFI(backend=self.Backend()) + def foo(): + pass + foo_cb = ffi.callback("void foo()", foo) + result = foo_cb() + assert result is None + + def test_char_cast(self): + ffi = FFI(backend=self.Backend()) + p = ffi.cast("int", b'\x01') + assert ffi.typeof(p) is ffi.typeof("int") + assert int(p) == 1 + p = ffi.cast("int", ffi.cast("char", b"a")) + assert int(p) == ord("a") + p = ffi.cast("int", ffi.cast("char", b"\x80")) + assert int(p) == 0x80 # "char" is considered unsigned in this case + p = ffi.cast("int", b"\x81") + assert int(p) == 0x81 + + def test_wchar_cast(self): + ffi = FFI(backend=self.Backend()) + self.check_wchar_t(ffi) + p = ffi.cast("int", ffi.cast("wchar_t", u+'\u1234')) + assert int(p) == 0x1234 + p = ffi.cast("long long", ffi.cast("wchar_t", -1)) + if SIZE_OF_WCHAR == 2: # 2 bytes, unsigned + assert int(p) == 0xffff + elif (sys.platform.startswith('linux') and + platform.machine().startswith('x86')): # known to be signed + assert int(p) == -1 + else: # in general, it can be either signed or not + assert int(p) in [-1, 0xffffffff] # e.g. on arm, both cases occur + p = ffi.cast("int", u+'\u1234') + assert int(p) == 0x1234 + + def test_cast_array_to_charp(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short int[]", [0x1234, 0x5678]) + p = ffi.cast("char*", a) + data = b''.join([p[i] for i in range(4)]) + if sys.byteorder == 'little': + assert data == b'\x34\x12\x78\x56' + else: + assert data == b'\x12\x34\x56\x78' + + def test_cast_between_pointers(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short int[]", [0x1234, 0x5678]) + p = ffi.cast("short*", a) + p2 = ffi.cast("int*", p) + q = ffi.cast("char*", p2) + data = b''.join([q[i] for i in range(4)]) + if sys.byteorder == 'little': + assert data == b'\x34\x12\x78\x56' + else: + assert data == b'\x12\x34\x56\x78' + + def test_cast_pointer_and_int(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short int[]", [0x1234, 0x5678]) + l1 = ffi.cast("intptr_t", a) + p = ffi.cast("short*", a) + l2 = ffi.cast("intptr_t", p) + assert int(l1) == int(l2) != 0 + q = ffi.cast("short*", l1) + assert q == ffi.cast("short*", int(l1)) + assert q[0] == 0x1234 + assert int(ffi.cast("intptr_t", ffi.NULL)) == 0 + + def test_cast_functionptr_and_int(self): + ffi = FFI(backend=self.Backend()) + def cb(n): + return n + 1 + a = ffi.callback("int(*)(int)", cb) + p = ffi.cast("void *", a) + assert p + b = ffi.cast("int(*)(int)", p) + assert b(41) == 42 + assert a == b + assert hash(a) == hash(b) + + def test_callback_crash(self): + ffi = FFI(backend=self.Backend()) + def cb(n): + raise Exception + a = ffi.callback("int(*)(int)", cb, error=42) + res = a(1) # and the error reported to stderr + assert res == 42 + + def test_structptr_argument(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int a, b; };") + def cb(p): + return p[0].a * 1000 + p[0].b * 100 + p[1].a * 10 + p[1].b + a = ffi.callback("int(*)(struct foo_s[])", cb) + res = a([[5, 6], {'a': 7, 'b': 8}]) + assert res == 5678 + res = a([[5], {'b': 8}]) + assert res == 5008 + + def test_array_argument_as_list(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int a, b; };") + seen = [] + def cb(argv): + seen.append(ffi.string(argv[0])) + seen.append(ffi.string(argv[1])) + a = ffi.callback("void(*)(char *[])", cb) + a([ffi.new("char[]", b"foobar"), ffi.new("char[]", b"baz")]) + assert seen == [b"foobar", b"baz"] + + def test_cast_float(self): + ffi = FFI(backend=self.Backend()) + a = ffi.cast("float", 12) + assert float(a) == 12.0 + a = ffi.cast("float", 12.5) + assert float(a) == 12.5 + a = ffi.cast("float", b"A") + assert float(a) == ord("A") + a = ffi.cast("int", 12.9) + assert int(a) == 12 + a = ffi.cast("char", 66.9 + 256) + assert ffi.string(a) == b"B" + # + a = ffi.cast("float", ffi.cast("int", 12)) + assert float(a) == 12.0 + a = ffi.cast("float", ffi.cast("double", 12.5)) + assert float(a) == 12.5 + a = ffi.cast("float", ffi.cast("char", b"A")) + assert float(a) == ord("A") + a = ffi.cast("int", ffi.cast("double", 12.9)) + assert int(a) == 12 + a = ffi.cast("char", ffi.cast("double", 66.9 + 256)) + assert ffi.string(a) == b"B" + + def test_enum(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum foo { A0, B0, CC0, D0 };") + assert ffi.string(ffi.cast("enum foo", 0)) == "A0" + assert ffi.string(ffi.cast("enum foo", 2)) == "CC0" + assert ffi.string(ffi.cast("enum foo", 3)) == "D0" + assert ffi.string(ffi.cast("enum foo", 4)) == "4" + ffi.cdef("enum bar { A1, B1=-2, CC1, D1, E1 };") + assert ffi.string(ffi.cast("enum bar", 0)) == "A1" + assert ffi.string(ffi.cast("enum bar", -2)) == "B1" + assert ffi.string(ffi.cast("enum bar", -1)) == "CC1" + assert ffi.string(ffi.cast("enum bar", 1)) == "E1" + assert ffi.cast("enum bar", -2) == ffi.cast("enum bar", -2) + assert ffi.cast("enum foo", 0) == ffi.cast("enum bar", 0) + assert ffi.cast("enum bar", 0) == ffi.cast("int", 0) + assert repr(ffi.cast("enum bar", -1)) == "<cdata 'enum bar' -1: CC1>" + assert repr(ffi.cast("enum foo", -1)) == ( # enums are unsigned, if + "<cdata 'enum foo' 4294967295>") # they contain no neg value + ffi.cdef("enum baz { A2=0x1000, B2=0x2000 };") + assert ffi.string(ffi.cast("enum baz", 0x1000)) == "A2" + assert ffi.string(ffi.cast("enum baz", 0x2000)) == "B2" + + def test_enum_in_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum foo { A, B, C, D }; struct bar { enum foo e; };") + s = ffi.new("struct bar *") + s.e = 0 + assert s.e == 0 + s.e = 3 + assert s.e == 3 + assert s[0].e == 3 + s[0].e = 2 + assert s.e == 2 + assert s[0].e == 2 + s.e = ffi.cast("enum foo", -1) + assert s.e == 4294967295 + assert s[0].e == 4294967295 + s.e = s.e + py.test.raises(TypeError, "s.e = 'B'") + py.test.raises(TypeError, "s.e = '2'") + py.test.raises(TypeError, "s.e = '#2'") + py.test.raises(TypeError, "s.e = '#7'") + + def test_enum_non_contiguous(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum foo { A, B=42, C };") + assert ffi.string(ffi.cast("enum foo", 0)) == "A" + assert ffi.string(ffi.cast("enum foo", 42)) == "B" + assert ffi.string(ffi.cast("enum foo", 43)) == "C" + invalid_value = ffi.cast("enum foo", 2) + assert int(invalid_value) == 2 + assert ffi.string(invalid_value) == "2" + + def test_enum_char_hex_oct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(r"enum foo{A='!', B='\'', C=0x10, D=010, E=- 0x10, F=-010};") + assert ffi.string(ffi.cast("enum foo", ord('!'))) == "A" + assert ffi.string(ffi.cast("enum foo", ord("'"))) == "B" + assert ffi.string(ffi.cast("enum foo", 16)) == "C" + assert ffi.string(ffi.cast("enum foo", 8)) == "D" + assert ffi.string(ffi.cast("enum foo", -16)) == "E" + assert ffi.string(ffi.cast("enum foo", -8)) == "F" + + def test_enum_partial(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(r"enum foo {A, ...}; enum bar { B, C };") + needs_dlopen_none() + lib = ffi.dlopen(None) + assert lib.B == 0 + py.test.raises(VerificationMissing, getattr, lib, "A") + assert lib.C == 1 + + def test_array_of_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a, b; };") + s = ffi.new("struct foo[1]") + py.test.raises(AttributeError, 's.b') + py.test.raises(AttributeError, 's.b = 412') + s[0].b = 412 + assert s[0].b == 412 + py.test.raises(IndexError, 's[1]') + + def test_pointer_to_array(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int(**)[5]") + assert repr(p) == "<cdata 'int(* *)[5]' owning %d bytes>" % SIZE_OF_PTR + + def test_iterate_array(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("char[]", b"hello") + assert list(a) == [b"h", b"e", b"l", b"l", b"o", b"\0"] + assert list(iter(a)) == [b"h", b"e", b"l", b"l", b"o", b"\0"] + # + py.test.raises(TypeError, iter, ffi.cast("char *", a)) + py.test.raises(TypeError, list, ffi.cast("char *", a)) + py.test.raises(TypeError, iter, ffi.new("int *")) + py.test.raises(TypeError, list, ffi.new("int *")) + + def test_offsetof(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a, b, c; };") + assert ffi.offsetof("struct foo", "a") == 0 + assert ffi.offsetof("struct foo", "b") == 4 + assert ffi.offsetof("struct foo", "c") == 8 + + def test_offsetof_nested(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a, b, c; };" + "struct bar { struct foo d, e; };") + assert ffi.offsetof("struct bar", "e") == 12 + py.test.raises(KeyError, ffi.offsetof, "struct bar", "e.a") + assert ffi.offsetof("struct bar", "e", "a") == 12 + assert ffi.offsetof("struct bar", "e", "b") == 16 + assert ffi.offsetof("struct bar", "e", "c") == 20 + + def test_offsetof_array(self): + ffi = FFI(backend=self.Backend()) + assert ffi.offsetof("int[]", 51) == 51 * ffi.sizeof("int") + assert ffi.offsetof("int *", 51) == 51 * ffi.sizeof("int") + ffi.cdef("struct bar { int a, b; int c[99]; };") + assert ffi.offsetof("struct bar", "c") == 2 * ffi.sizeof("int") + assert ffi.offsetof("struct bar", "c", 0) == 2 * ffi.sizeof("int") + assert ffi.offsetof("struct bar", "c", 51) == 53 * ffi.sizeof("int") + + def test_alignof(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { char a; short b; char c; };") + assert ffi.alignof("int") == 4 + assert ffi.alignof("double") in (4, 8) + assert ffi.alignof("struct foo") == 2 + + def test_bitfield(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo { int a:10, b:20, c:3; };") + assert ffi.sizeof("struct foo") == 8 + s = ffi.new("struct foo *") + s.a = 511 + py.test.raises(OverflowError, "s.a = 512") + py.test.raises(OverflowError, "s[0].a = 512") + assert s.a == 511 + s.a = -512 + py.test.raises(OverflowError, "s.a = -513") + py.test.raises(OverflowError, "s[0].a = -513") + assert s.a == -512 + s.c = 3 + assert s.c == 3 + py.test.raises(OverflowError, "s.c = 4") + py.test.raises(OverflowError, "s[0].c = 4") + s.c = -4 + assert s.c == -4 + + def test_bitfield_enum(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + typedef enum { AA, BB, CC } foo_e; + typedef struct { foo_e f:2; } foo_s; + """) + s = ffi.new("foo_s *") + s.f = 2 + assert s.f == 2 + + def test_anonymous_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("typedef struct { int a; } foo_t;") + ffi.cdef("typedef struct { char b, c; } bar_t;") + f = ffi.new("foo_t *", [12345]) + b = ffi.new("bar_t *", [b"B", b"C"]) + assert f.a == 12345 + assert b.b == b"B" + assert b.c == b"C" + assert repr(b).startswith("<cdata 'bar_t *'") + + def test_struct_with_two_usages(self): + for name in ['foo_s', '']: # anonymous or not + ffi = FFI(backend=self.Backend()) + ffi.cdef("typedef struct %s { int a; } foo_t, *foo_p;" % name) + f = ffi.new("foo_t *", [12345]) + ps = ffi.new("foo_p[]", [f]) + + def test_pointer_arithmetic(self): + ffi = FFI(backend=self.Backend()) + s = ffi.new("short[]", list(range(100, 110))) + p = ffi.cast("short *", s) + assert p[2] == 102 + assert p+1 == p+1 + assert p+1 != p+0 + assert p == p+0 == p-0 + assert (p+1)[0] == 101 + assert (p+19)[-10] == 109 + assert (p+5) - (p+1) == 4 + assert p == s+0 + assert p+1 == s+1 + + def test_pointer_comparison(self): + ffi = FFI(backend=self.Backend()) + s = ffi.new("short[]", list(range(100))) + p = ffi.cast("short *", s) + assert (p < s) is False + assert (p <= s) is True + assert (p == s) is True + assert (p != s) is False + assert (p > s) is False + assert (p >= s) is True + assert (s < p) is False + assert (s <= p) is True + assert (s == p) is True + assert (s != p) is False + assert (s > p) is False + assert (s >= p) is True + q = p + 1 + assert (q < s) is False + assert (q <= s) is False + assert (q == s) is False + assert (q != s) is True + assert (q > s) is True + assert (q >= s) is True + assert (s < q) is True + assert (s <= q) is True + assert (s == q) is False + assert (s != q) is True + assert (s > q) is False + assert (s >= q) is False + assert (q < p) is False + assert (q <= p) is False + assert (q == p) is False + assert (q != p) is True + assert (q > p) is True + assert (q >= p) is True + assert (p < q) is True + assert (p <= q) is True + assert (p == q) is False + assert (p != q) is True + assert (p > q) is False + assert (p >= q) is False + # + assert (None == s) is False + assert (None != s) is True + assert (s == None) is False + assert (s != None) is True + assert (None == q) is False + assert (None != q) is True + assert (q == None) is False + assert (q != None) is True + + def test_integer_comparison(self): + ffi = FFI(backend=self.Backend()) + x = ffi.cast("int", 123) + y = ffi.cast("int", 456) + assert x < y + # + z = ffi.cast("double", 78.9) + assert x > z + assert y > z + + def test_ffi_buffer_ptr(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short *", 100) + try: + b = ffi.buffer(a) + except NotImplementedError as e: + py.test.skip(str(e)) + assert type(b) is ffi.buffer + content = b[:] + assert len(content) == len(b) == 2 + if sys.byteorder == 'little': + assert content == b'\x64\x00' + assert b[0] == b'\x64' + b[0] = b'\x65' + else: + assert content == b'\x00\x64' + assert b[1] == b'\x64' + b[1] = b'\x65' + assert a[0] == 101 + + def test_ffi_buffer_array(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("int[]", list(range(100, 110))) + try: + b = ffi.buffer(a) + except NotImplementedError as e: + py.test.skip(str(e)) + content = b[:] + if sys.byteorder == 'little': + assert content.startswith(b'\x64\x00\x00\x00\x65\x00\x00\x00') + b[4] = b'\x45' + else: + assert content.startswith(b'\x00\x00\x00\x64\x00\x00\x00\x65') + b[7] = b'\x45' + assert len(content) == 4 * 10 + assert a[1] == 0x45 + + def test_ffi_buffer_ptr_size(self): + ffi = FFI(backend=self.Backend()) + a = ffi.new("short *", 0x4243) + try: + b = ffi.buffer(a, 1) + except NotImplementedError as e: + py.test.skip(str(e)) + content = b[:] + assert len(content) == 1 + if sys.byteorder == 'little': + assert content == b'\x43' + b[0] = b'\x62' + assert a[0] == 0x4262 + else: + assert content == b'\x42' + b[0] = b'\x63' + assert a[0] == 0x6343 + + def test_ffi_buffer_array_size(self): + ffi = FFI(backend=self.Backend()) + a1 = ffi.new("int[]", list(range(100, 110))) + a2 = ffi.new("int[]", list(range(100, 115))) + try: + ffi.buffer(a1) + except NotImplementedError as e: + py.test.skip(str(e)) + assert ffi.buffer(a1)[:] == ffi.buffer(a2, 4*10)[:] + + def test_ffi_buffer_with_file(self): + ffi = FFI(backend=self.Backend()) + import tempfile, os, array + fd, filename = tempfile.mkstemp() + f = os.fdopen(fd, 'r+b') + a = ffi.new("int[]", list(range(1005))) + try: + ffi.buffer(a, 512) + except NotImplementedError as e: + py.test.skip(str(e)) + f.write(ffi.buffer(a, 1000 * ffi.sizeof("int"))) + f.seek(0) + assert f.read() == array.array('i', range(1000)).tostring() + f.seek(0) + b = ffi.new("int[]", 1005) + f.readinto(ffi.buffer(b, 1000 * ffi.sizeof("int"))) + assert list(a)[:1000] + [0] * (len(a)-1000) == list(b) + f.close() + os.unlink(filename) + + def test_ffi_buffer_with_io(self): + ffi = FFI(backend=self.Backend()) + import io, array + f = io.BytesIO() + a = ffi.new("int[]", list(range(1005))) + try: + ffi.buffer(a, 512) + except NotImplementedError as e: + py.test.skip(str(e)) + f.write(ffi.buffer(a, 1000 * ffi.sizeof("int"))) + f.seek(0) + assert f.read() == array.array('i', range(1000)).tostring() + f.seek(0) + b = ffi.new("int[]", 1005) + f.readinto(ffi.buffer(b, 1000 * ffi.sizeof("int"))) + assert list(a)[:1000] + [0] * (len(a)-1000) == list(b) + f.close() + + def test_ffi_buffer_comparisons(self): + ffi = FFI(backend=self.Backend()) + ba = bytearray(range(100, 110)) + if sys.version_info >= (2, 7): + assert ba == memoryview(ba) # justification for the following + a = ffi.new("uint8_t[]", list(ba)) + c = ffi.new("uint8_t[]", [99] + list(ba)) + try: + b_full = ffi.buffer(a) + b_short = ffi.buffer(a, 3) + b_mid = ffi.buffer(a, 6) + b_other = ffi.buffer(c, 6) + except NotImplementedError as e: + py.test.skip(str(e)) + else: + content = b_full[:] + assert content == b_full == ba + assert b_other < b_short < b_mid < b_full + assert ba > b_mid > ba[0:2] + assert b_short != ba[1:4] + + def test_array_in_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int len; short data[5]; };") + p = ffi.new("struct foo_s *") + p.data[3] = 5 + assert p.data[3] == 5 + assert repr(p.data).startswith("<cdata 'short[5]' 0x") + + def test_struct_containing_array_varsize_workaround(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int len; short data[0]; };") + p = ffi.new("char[]", ffi.sizeof("struct foo_s") + 7 * SIZE_OF_SHORT) + q = ffi.cast("struct foo_s *", p) + assert q.len == 0 + # 'q.data' gets not a 'short[0]', but just a 'short *' instead + assert repr(q.data).startswith("<cdata 'short *' 0x") + assert q.data[6] == 0 + q.data[6] = 15 + assert q.data[6] == 15 + + def test_new_struct_containing_array_varsize(self): + py.test.skip("later?") + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int len; short data[]; };") + p = ffi.new("struct foo_s *", 10) # a single integer is the length + assert p.len == 0 + assert p.data[9] == 0 + py.test.raises(IndexError, "p.data[10]") + + def test_ffi_typeof_getcname(self): + ffi = FFI(backend=self.Backend()) + assert ffi.getctype("int") == "int" + assert ffi.getctype("int", 'x') == "int x" + assert ffi.getctype("int*") == "int *" + assert ffi.getctype("int*", '') == "int *" + assert ffi.getctype("int*", 'x') == "int * x" + assert ffi.getctype("int", '*') == "int *" + assert ffi.getctype("int", ' * x ') == "int * x" + assert ffi.getctype(ffi.typeof("int*"), '*') == "int * *" + assert ffi.getctype("int", '[5]') == "int[5]" + assert ffi.getctype("int[5]", '[6]') == "int[6][5]" + assert ffi.getctype("int[5]", '(*)') == "int(*)[5]" + # special-case for convenience: automatically put '()' around '*' + assert ffi.getctype("int[5]", '*') == "int(*)[5]" + assert ffi.getctype("int[5]", '*foo') == "int(*foo)[5]" + assert ffi.getctype("int[5]", ' ** foo ') == "int(** foo)[5]" + + def test_array_of_func_ptr(self): + ffi = FFI(backend=self.Backend()) + f = ffi.cast("int(*)(int)", 42) + assert f != ffi.NULL + py.test.raises(CDefError, ffi.cast, "int(int)", 42) + py.test.raises(CDefError, ffi.new, "int([5])(int)") + a = ffi.new("int(*[5])(int)", [f]) + assert ffi.getctype(ffi.typeof(a)) == "int(*[5])(int)" + assert len(a) == 5 + assert a[0] == f + assert a[1] == ffi.NULL + py.test.raises(TypeError, ffi.cast, "int(*)(int)[5]", 0) + # + def cb(n): + return n + 1 + f = ffi.callback("int(*)(int)", cb) + a = ffi.new("int(*[5])(int)", [f, f]) + assert a[1](42) == 43 + + def test_callback_as_function_argument(self): + # In C, function arguments can be declared with a function type, + # which is automatically replaced with the ptr-to-function type. + ffi = FFI(backend=self.Backend()) + def cb(a, b): + return chr(ord(a) + ord(b)).encode() + f = ffi.callback("char cb(char, char)", cb) + assert f(b'A', b'\x01') == b'B' + def g(callback): + return callback(b'A', b'\x01') + g = ffi.callback("char g(char cb(char, char))", g) + assert g(f) == b'B' + + def test_vararg_callback(self): + py.test.skip("callback with '...'") + ffi = FFI(backend=self.Backend()) + def cb(i, va_list): + j = ffi.va_arg(va_list, "int") + k = ffi.va_arg(va_list, "long long") + return i * 2 + j * 3 + k * 5 + f = ffi.callback("long long cb(long i, ...)", cb) + res = f(10, ffi.cast("int", 100), ffi.cast("long long", 1000)) + assert res == 20 + 300 + 5000 + + def test_callback_decorator(self): + ffi = FFI(backend=self.Backend()) + # + @ffi.callback("long(long, long)", error=42) + def cb(a, b): + return a - b + # + assert cb(-100, -10) == -90 + sz = ffi.sizeof("long") + assert cb((1 << (sz*8-1)) - 1, -10) == 42 + + def test_unique_types(self): + ffi1 = FFI(backend=self.Backend()) + ffi2 = FFI(backend=self.Backend()) + assert ffi1.typeof("char") is ffi2.typeof("char ") + assert ffi1.typeof("long") is ffi2.typeof("signed long int") + assert ffi1.typeof("double *") is ffi2.typeof("double*") + assert ffi1.typeof("int ***") is ffi2.typeof(" int * * *") + assert ffi1.typeof("int[]") is ffi2.typeof("signed int[]") + assert ffi1.typeof("signed int*[17]") is ffi2.typeof("int *[17]") + assert ffi1.typeof("void") is ffi2.typeof("void") + assert ffi1.typeof("int(*)(int,int)") is ffi2.typeof("int(*)(int,int)") + # + # these depend on user-defined data, so should not be shared + assert ffi1.typeof("struct foo") is not ffi2.typeof("struct foo") + assert ffi1.typeof("union foo *") is not ffi2.typeof("union foo*") + # the following test is an opaque enum, which we no longer support + #assert ffi1.typeof("enum foo") is not ffi2.typeof("enum foo") + # sanity check: twice 'ffi1' + assert ffi1.typeof("struct foo*") is ffi1.typeof("struct foo *") + + def test_anonymous_enum(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("typedef enum { Value0 = 0 } e, *pe;\n" + "typedef enum { Value1 = 1 } e1;") + assert ffi.getctype("e*") == 'e *' + assert ffi.getctype("pe") == 'e *' + assert ffi.getctype("e1*") == 'e1 *' + + def test_opaque_enum(self): + import warnings + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum foo;") + with warnings.catch_warnings(record=True) as log: + warnings.simplefilter("always") + n = ffi.cast("enum foo", -1) + assert int(n) == 0xffffffff + assert str(log[0].message) == ( + "'enum foo' has no values explicitly defined; " + "guessing that it is equivalent to 'unsigned int'") + + def test_new_ctype(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *") + py.test.raises(TypeError, ffi.new, p) + p = ffi.new(ffi.typeof("int *"), 42) + assert p[0] == 42 + + def test_enum_with_non_injective_mapping(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum e { AA=0, BB=0, CC=0, DD=0 };") + e = ffi.cast("enum e", 0) + assert ffi.string(e) == "AA" # pick the first one arbitrarily + + def test_enum_refer_previous_enum_value(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("enum e { AA, BB=2, CC=4, DD=BB, EE, FF=CC, GG=FF };") + assert ffi.string(ffi.cast("enum e", 2)) == "BB" + assert ffi.string(ffi.cast("enum e", 3)) == "EE" + assert ffi.sizeof("char[DD]") == 2 + assert ffi.sizeof("char[EE]") == 3 + assert ffi.sizeof("char[FF]") == 4 + assert ffi.sizeof("char[GG]") == 4 + + def test_nested_anonymous_struct(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct foo_s { + struct { int a, b; }; + union { int c, d; }; + }; + """) + assert ffi.sizeof("struct foo_s") == 3 * SIZE_OF_INT + p = ffi.new("struct foo_s *", [1, 2, 3]) + assert p.a == 1 + assert p.b == 2 + assert p.c == 3 + assert p.d == 3 + p.d = 17 + assert p.c == 17 + p.b = 19 + assert p.a == 1 + assert p.b == 19 + assert p.c == 17 + assert p.d == 17 + p = ffi.new("struct foo_s *", {'b': 12, 'd': 14}) + assert p.a == 0 + assert p.b == 12 + assert p.c == 14 + assert p.d == 14 + py.test.raises(ValueError, ffi.new, "struct foo_s *", [0, 0, 0, 0]) + + def test_nested_field_offset_align(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct foo_s { + struct { int a; char b; }; + union { char c; }; + }; + """) + assert ffi.offsetof("struct foo_s", "c") == 2 * SIZE_OF_INT + assert ffi.sizeof("struct foo_s") == 3 * SIZE_OF_INT + + def test_nested_anonymous_union(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + union foo_u { + struct { int a, b; }; + union { int c, d; }; + }; + """) + assert ffi.sizeof("union foo_u") == 2 * SIZE_OF_INT + p = ffi.new("union foo_u *", [5]) + assert p.a == 5 + assert p.b == 0 + assert p.c == 5 + assert p.d == 5 + p.d = 17 + assert p.c == 17 + assert p.a == 17 + p.b = 19 + assert p.a == 17 + assert p.b == 19 + assert p.c == 17 + assert p.d == 17 + p = ffi.new("union foo_u *", {'d': 14}) + assert p.a == 14 + assert p.b == 0 + assert p.c == 14 + assert p.d == 14 + p = ffi.new("union foo_u *", {'a': -63, 'b': 12}) + assert p.a == -63 + assert p.b == 12 + assert p.c == -63 + assert p.d == -63 + p = ffi.new("union foo_u *", [123, 456]) + assert p.a == 123 + assert p.b == 456 + assert p.c == 123 + assert p.d == 123 + py.test.raises(ValueError, ffi.new, "union foo_u *", [0, 0, 0]) + + def test_nested_anonymous_struct_2(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct foo_s { + int a; + union { int b; union { int c, d; }; }; + int e; + }; + """) + assert ffi.sizeof("struct foo_s") == 3 * SIZE_OF_INT + p = ffi.new("struct foo_s *", [11, 22, 33]) + assert p.a == 11 + assert p.b == p.c == p.d == 22 + assert p.e == 33 + py.test.raises(ValueError, ffi.new, "struct foo_s *", [11, 22, 33, 44]) + FOO = ffi.typeof("struct foo_s") + fields = [(name, fld.offset, fld.flags) for (name, fld) in FOO.fields] + assert fields == [ + ('a', 0 * SIZE_OF_INT, 0), + ('b', 1 * SIZE_OF_INT, 0), + ('c', 1 * SIZE_OF_INT, 1), + ('d', 1 * SIZE_OF_INT, 1), + ('e', 2 * SIZE_OF_INT, 0), + ] + + def test_cast_to_array_type(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[4]", [-5]) + q = ffi.cast("int[3]", p) + assert q[0] == -5 + assert repr(q).startswith("<cdata 'int[3]' 0x") + + def test_gc(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + seen = [] + def destructor(p1): + assert p1 is p + assert p1[0] == 123 + seen.append(1) + q = ffi.gc(p, destructor) + assert ffi.typeof(q) is ffi.typeof(p) + import gc; gc.collect() + assert seen == [] + del q + import gc; gc.collect(); gc.collect(); gc.collect() + assert seen == [1] + + def test_gc_2(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + seen = [] + q1 = ffi.gc(p, lambda p: seen.append(1)) + q2 = ffi.gc(q1, lambda p: seen.append(2)) + import gc; gc.collect() + assert seen == [] + del q1, q2 + import gc; gc.collect(); gc.collect(); gc.collect(); gc.collect() + assert seen == [2, 1] + + def test_gc_3(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + r = ffi.new("int *", 123) + seen = [] + seen_r = [] + q1 = ffi.gc(p, lambda p: seen.append(1)) + s1 = ffi.gc(r, lambda r: seen_r.append(4)) + q2 = ffi.gc(q1, lambda p: seen.append(2)) + s2 = ffi.gc(s1, lambda r: seen_r.append(5)) + q3 = ffi.gc(q2, lambda p: seen.append(3)) + import gc; gc.collect() + assert seen == [] + assert seen_r == [] + del q1, q2, q3, s2, s1 + import gc; gc.collect(); gc.collect(); gc.collect(); gc.collect() + assert seen == [3, 2, 1] + assert seen_r == [5, 4] + + def test_gc_4(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + seen = [] + q1 = ffi.gc(p, lambda p: seen.append(1)) + q2 = ffi.gc(q1, lambda p: seen.append(2)) + q3 = ffi.gc(q2, lambda p: seen.append(3)) + import gc; gc.collect() + assert seen == [] + del q1, q3 # q2 remains, and has a hard ref to q1 + import gc; gc.collect(); gc.collect(); gc.collect() + assert seen == [3] + + def test_gc_disable(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + py.test.raises(TypeError, ffi.gc, p, None) + seen = [] + q1 = ffi.gc(p, lambda p: seen.append(1)) + q2 = ffi.gc(q1, lambda p: seen.append(2)) + import gc; gc.collect() + assert seen == [] + assert ffi.gc(q1, None) is None + del q1, q2 + import gc; gc.collect(); gc.collect(); gc.collect() + assert seen == [2] + + def test_gc_finite_list(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int *", 123) + keepalive = [] + for i in range(10): + keepalive.append(ffi.gc(p, lambda p: None)) + del keepalive[:] + import gc; gc.collect(); gc.collect() + for i in range(10): + keepalive.append(ffi.gc(p, lambda p: None)) + + def test_CData_CType(self): + ffi = FFI(backend=self.Backend()) + assert isinstance(ffi.cast("int", 0), ffi.CData) + assert isinstance(ffi.new("int *"), ffi.CData) + assert not isinstance(ffi.typeof("int"), ffi.CData) + assert not isinstance(ffi.cast("int", 0), ffi.CType) + assert not isinstance(ffi.new("int *"), ffi.CType) + + def test_CData_CType_2(self): + ffi = FFI(backend=self.Backend()) + assert isinstance(ffi.typeof("int"), ffi.CType) + + def test_bool(self): + ffi = FFI(backend=self.Backend()) + assert int(ffi.cast("_Bool", 0.1)) == 1 + assert int(ffi.cast("_Bool", -0.0)) == 0 + assert int(ffi.cast("_Bool", b'\x02')) == 1 + assert int(ffi.cast("_Bool", b'\x00')) == 0 + assert int(ffi.cast("_Bool", b'\x80')) == 1 + assert ffi.new("_Bool *", False)[0] == 0 + assert ffi.new("_Bool *", 1)[0] == 1 + py.test.raises(OverflowError, ffi.new, "_Bool *", 2) + py.test.raises(TypeError, ffi.string, ffi.cast("_Bool", 2)) + + def test_use_own_bool(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("""typedef int bool;""") + + def test_ordering_bug1(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct foo_s { + struct bar_s *p; + }; + struct bar_s { + struct foo_s foo; + }; + """) + q = ffi.new("struct foo_s *") + bar = ffi.new("struct bar_s *") + q.p = bar + assert q.p.foo.p == ffi.NULL + + def test_ordering_bug2(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + struct bar_s; + + struct foo_s { + void (*foo)(struct bar_s[]); + }; + + struct bar_s { + struct foo_s foo; + }; + """) + q = ffi.new("struct foo_s *") + + def test_addressof(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int x, y; };") + p = ffi.new("struct foo_s *") + a = ffi.addressof(p[0]) + assert repr(a).startswith("<cdata 'struct foo_s *' 0x") + assert a == p + py.test.raises(TypeError, ffi.addressof, p) + py.test.raises((AttributeError, TypeError), ffi.addressof, 5) + py.test.raises(TypeError, ffi.addressof, ffi.cast("int", 5)) + + def test_addressof_field(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int x, y; };") + p = ffi.new("struct foo_s *") + a = ffi.addressof(p[0], 'y') + assert repr(a).startswith("<cdata 'int *' 0x") + assert int(ffi.cast("uintptr_t", a)) == ( + int(ffi.cast("uintptr_t", p)) + ffi.sizeof("int")) + assert a == ffi.addressof(p, 'y') + assert a != ffi.addressof(p, 'x') + + def test_addressof_field_nested(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int x, y; };" + "struct bar_s { struct foo_s a, b; };") + p = ffi.new("struct bar_s *") + py.test.raises(KeyError, ffi.addressof, p[0], 'b.y') + a = ffi.addressof(p[0], 'b', 'y') + assert int(ffi.cast("uintptr_t", a)) == ( + int(ffi.cast("uintptr_t", p)) + + ffi.sizeof("struct foo_s") + ffi.sizeof("int")) + + def test_addressof_anonymous_struct(self): + ffi = FFI() + ffi.cdef("typedef struct { int x; } foo_t;") + p = ffi.new("foo_t *") + a = ffi.addressof(p[0]) + assert a == p + + def test_addressof_array(self): + ffi = FFI() + p = ffi.new("int[52]") + p0 = ffi.addressof(p) + assert p0 == p + assert ffi.typeof(p0) is ffi.typeof("int(*)[52]") + py.test.raises(TypeError, ffi.addressof, p0) + # + p1 = ffi.addressof(p, 25) + assert ffi.typeof(p1) is ffi.typeof("int *") + assert (p1 - p) == 25 + assert ffi.addressof(p, 0) == p + + def test_addressof_pointer(self): + ffi = FFI() + array = ffi.new("int[50]") + p = ffi.cast("int *", array) + py.test.raises(TypeError, ffi.addressof, p) + assert ffi.addressof(p, 0) == p + assert ffi.addressof(p, 25) == p + 25 + assert ffi.typeof(ffi.addressof(p, 25)) == ffi.typeof(p) + # + ffi.cdef("struct foo { int a, b; };") + array = ffi.new("struct foo[50]") + p = ffi.cast("int *", array) + py.test.raises(TypeError, ffi.addressof, p) + assert ffi.addressof(p, 0) == p + assert ffi.addressof(p, 25) == p + 25 + assert ffi.typeof(ffi.addressof(p, 25)) == ffi.typeof(p) + + def test_addressof_array_in_struct(self): + ffi = FFI() + ffi.cdef("struct foo { int a, b; int c[50]; };") + p = ffi.new("struct foo *") + p1 = ffi.addressof(p, "c", 25) + assert ffi.typeof(p1) is ffi.typeof("int *") + assert p1 == ffi.cast("int *", p) + 27 + assert ffi.addressof(p, "c") == ffi.cast("int *", p) + 2 + assert ffi.addressof(p, "c", 0) == ffi.cast("int *", p) + 2 + p2 = ffi.addressof(p, 1) + assert ffi.typeof(p2) is ffi.typeof("struct foo *") + assert p2 == p + 1 + + def test_multiple_independent_structs(self): + ffi1 = FFI(); ffi1.cdef("struct foo { int x; };") + ffi2 = FFI(); ffi2.cdef("struct foo { int y, z; };") + foo1 = ffi1.new("struct foo *", [10]) + foo2 = ffi2.new("struct foo *", [20, 30]) + assert foo1.x == 10 + assert foo2.y == 20 + assert foo2.z == 30 + + def test_missing_include(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("typedef signed char schar_t;") + py.test.raises(CDefError, ffi2.cast, "schar_t", 142) + + def test_include_typedef(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("typedef signed char schar_t;") + ffi2.include(ffi1) + p = ffi2.cast("schar_t", 142) + assert int(p) == 142 - 256 + + def test_include_struct(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("struct foo { int x; };") + ffi2.include(ffi1) + p = ffi2.new("struct foo *", [142]) + assert p.x == 142 + + def test_include_union(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("union foo { int x; };") + ffi2.include(ffi1) + p = ffi2.new("union foo *", [142]) + assert p.x == 142 + + def test_include_enum(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("enum foo { FA, FB, FC };") + ffi2.include(ffi1) + p = ffi2.cast("enum foo", 1) + assert ffi2.string(p) == "FB" + assert ffi2.sizeof("char[FC]") == 2 + + def test_include_typedef_2(self): + backend = self.Backend() + ffi1 = FFI(backend=backend) + ffi2 = FFI(backend=backend) + ffi1.cdef("typedef struct { int x; } *foo_p;") + ffi2.include(ffi1) + p = ffi2.new("foo_p", [142]) + assert p.x == 142 + + def test_ignore_multiple_declarations_of_constant(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("#define FOO 42") + ffi.cdef("#define FOO 42") + py.test.raises(FFIError, ffi.cdef, "#define FOO 43") + + def test_struct_packed(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct nonpacked { char a; int b; };") + ffi.cdef("struct is_packed { char a; int b; };", packed=True) + ffi.cdef("struct is_packed1 { char a; int b; };", pack=1) + ffi.cdef("struct is_packed2 { char a; int b; };", pack=2) + ffi.cdef("struct is_packed4 { char a; int b; };", pack=4) + ffi.cdef("struct is_packed8 { char a; int b; };", pack=8) + assert ffi.sizeof("struct nonpacked") == 8 + assert ffi.sizeof("struct is_packed") == 5 + assert ffi.sizeof("struct is_packed1") == 5 + assert ffi.sizeof("struct is_packed2") == 6 + assert ffi.sizeof("struct is_packed4") == 8 + assert ffi.sizeof("struct is_packed8") == 8 + assert ffi.alignof("struct nonpacked") == 4 + assert ffi.alignof("struct is_packed") == 1 + assert ffi.alignof("struct is_packed1") == 1 + assert ffi.alignof("struct is_packed2") == 2 + assert ffi.alignof("struct is_packed4") == 4 + assert ffi.alignof("struct is_packed8") == 4 + for name in ['is_packed', 'is_packed1', 'is_packed2', + 'is_packed4', 'is_packed8']: + s = ffi.new("struct %s[2]" % name) + s[0].b = 42623381 + s[0].a = b'X' + s[1].b = -4892220 + s[1].a = b'Y' + assert s[0].b == 42623381 + assert s[0].a == b'X' + assert s[1].b == -4892220 + assert s[1].a == b'Y' + + def test_pack_valueerror(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(ValueError, ffi.cdef, "", pack=3) + py.test.raises(ValueError, ffi.cdef, "", packed=2) + py.test.raises(ValueError, ffi.cdef, "", packed=True, pack=1) + + def test_define_integer_constant(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef(""" + #define DOT_0 0 + #define DOT 100 + #define DOT_OCT 0100l + #define DOT_HEX 0x100u + #define DOT_HEX2 0X10 + #define DOT_UL 1000UL + enum foo {AA, BB=DOT, CC}; + """) + needs_dlopen_none() + lib = ffi.dlopen(None) + assert ffi.string(ffi.cast("enum foo", 100)) == "BB" + assert lib.DOT_0 == 0 + assert lib.DOT == 100 + assert lib.DOT_OCT == 0o100 + assert lib.DOT_HEX == 0x100 + assert lib.DOT_HEX2 == 0x10 + assert lib.DOT_UL == 1000 + + def test_opaque_struct_becomes_nonopaque(self): + # Issue #193: if we use a struct between the first cdef() where it is + # declared and another cdef() where its fields are defined, then the + # definition was ignored. + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s;") + py.test.raises(TypeError, ffi.new, "struct foo_s *") + ffi.cdef("struct foo_s { int x; };") + ffi.new("struct foo_s *") + + def test_ffi_self_include(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(ValueError, ffi.include, ffi) + + def test_anonymous_enum_include(self): + ffi1 = FFI() + ffi1.cdef("enum { EE1 };") + ffi = FFI() + ffi.include(ffi1) + ffi.cdef("enum { EE2, EE3 };") + needs_dlopen_none() + lib = ffi.dlopen(None) + assert lib.EE1 == 0 + assert lib.EE2 == 0 + assert lib.EE3 == 1 + + def test_init_once(self): + def do_init(): + seen.append(1) + return 42 + ffi = FFI() + seen = [] + for i in range(3): + res = ffi.init_once(do_init, "tag1") + assert res == 42 + assert seen == [1] + for i in range(3): + res = ffi.init_once(do_init, "tag2") + assert res == 42 + assert seen == [1, 1] + + def test_init_once_multithread(self): + import sys, time + if sys.version_info < (3,): + import thread + else: + import _thread as thread + # + def do_init(): + seen.append('init!') + time.sleep(1) + seen.append('init done') + return 7 + ffi = FFI() + seen = [] + for i in range(6): + def f(): + res = ffi.init_once(do_init, "tag") + seen.append(res) + thread.start_new_thread(f, ()) + time.sleep(1.5) + assert seen == ['init!', 'init done'] + 6 * [7] + + def test_sizeof_struct_directly(self): + # only works with the Python FFI instances + ffi = FFI(backend=self.Backend()) + assert ffi.sizeof("struct{int a;}") == ffi.sizeof("int") + + def test_callback_large_struct(self): + ffi = FFI(backend=self.Backend()) + # more than 8 bytes + ffi.cdef("struct foo_s { unsigned long a, b, c; };") + # + @ffi.callback("void(struct foo_s)") + def cb(s): + seen.append(ffi.typeof(s)) + s.a += 1 + s.b += 2 + s.c += 3 + seen.append(s.a) + seen.append(s.b) + seen.append(s.c) + # + s1 = ffi.new("struct foo_s *", {'a': 100, 'b': 200, 'c': 300}) + seen = [] + cb(s1[0]) + assert len(seen) == 4 + assert s1.a == 100 # unmodified + assert s1.b == 200 + assert s1.c == 300 + assert seen[0] == ffi.typeof("struct foo_s") + assert seen[1] == 101 + assert seen[2] == 202 + assert seen[3] == 303 + + def test_ffi_array_as_init(self): + ffi = FFI(backend=self.Backend()) + p = ffi.new("int[4]", [10, 20, 30, 400]) + q = ffi.new("int[4]", p) + assert list(q) == [10, 20, 30, 400] + py.test.raises(TypeError, ffi.new, "int[3]", p) + py.test.raises(TypeError, ffi.new, "int[5]", p) + py.test.raises(TypeError, ffi.new, "int16_t[4]", p) + s = ffi.new("struct {int i[4];}*", {'i': p}) + assert list(s.i) == [10, 20, 30, 400] + + def test_too_many_initializers(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(IndexError, ffi.new, "int[4]", [10, 20, 30, 40, 50]) |