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Diffstat (limited to 'testing/cffi1/test_new_ffi_1.py')
-rw-r--r-- | testing/cffi1/test_new_ffi_1.py | 1831 |
1 files changed, 0 insertions, 1831 deletions
diff --git a/testing/cffi1/test_new_ffi_1.py b/testing/cffi1/test_new_ffi_1.py deleted file mode 100644 index 640830b..0000000 --- a/testing/cffi1/test_new_ffi_1.py +++ /dev/null @@ -1,1831 +0,0 @@ -import py -import pytest -import platform, imp -import sys, os, ctypes -import cffi -from testing.udir import udir -from testing.support import * -from cffi.recompiler import recompile -from cffi.cffi_opcode import PRIMITIVE_TO_INDEX - -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 setup_module(): - global ffi, construction_params - ffi1 = cffi.FFI() - DEFS = r""" - struct repr { short a, b, c; }; - struct simple { int a; short b, c; }; - struct array { int a[2]; char b[3]; }; - struct recursive { int value; struct recursive *next; }; - union simple_u { int a; short b, c; }; - union init_u { char a; int b; }; - struct four_s { int a; short b, c, d; }; - union four_u { int a; short b, c, d; }; - struct string { const char *name; }; - struct ustring { const wchar_t *name; }; - struct voidp { void *p; int *q; short *r; }; - struct ab { int a, b; }; - struct abc { int a, b, c; }; - - /* don't use A0, B0, CC0, D0 because termios.h might be included - and it has its own #defines for these names */ - enum foq { cffiA0, cffiB0, cffiCC0, cffiD0 }; - enum bar { A1, B1=-2, CC1, D1, E1 }; - enum baz { A2=0x1000, B2=0x2000 }; - enum foo2 { A3, B3, C3, D3 }; - struct bar_with_e { enum foo2 e; }; - enum noncont { A4, B4=42, C4 }; - enum etypes {A5='!', B5='\'', C5=0x10, D5=010, E5=- 0x10, F5=-010}; - typedef enum { Value0 = 0 } e_t, *pe_t; - enum e_noninj { AA3=0, BB3=0, CC3=0, DD3=0 }; - enum e_prev { AA4, BB4=2, CC4=4, DD4=BB4, EE4, FF4=CC4, GG4=FF4 }; - - struct nesting { struct abc d, e; }; - struct array2 { int a, b; int c[99]; }; - struct align { char a; short b; char c; }; - struct bitfield { int a:10, b:20, c:3; }; - typedef enum { AA2, BB2, CC2 } foo_e_t; - typedef struct { foo_e_t f:2; } bfenum_t; - typedef struct { int a; } anon_foo_t; - typedef struct { char b, c; } anon_bar_t; - typedef struct named_foo_s { int a; } named_foo_t, *named_foo_p; - typedef struct { int a; } unnamed_foo_t, *unnamed_foo_p; - struct nonpacked { char a; int b; }; - struct array0 { int len; short data[0]; }; - struct array_no_length { int x; int a[]; }; - - struct nested_anon { - struct { int a, b; }; - union { int c, d; }; - }; - struct nested_field_ofs_s { - struct { int a; char b; }; - union { char c; }; - }; - union nested_anon_u { - struct { int a, b; }; - union { int c, d; }; - }; - struct abc50 { int a, b; int c[50]; }; - struct ints_and_bitfield { int a,b,c,d,e; int x:1; }; - """ - DEFS_PACKED = """ - struct is_packed { char a; int b; } /*here*/; - """ - if sys.platform == "win32": - DEFS = DEFS.replace('data[0]', 'data[1]') # not supported - CCODE = (DEFS + "\n#pragma pack(push,1)\n" + DEFS_PACKED + - "\n#pragma pack(pop)\n") - else: - CCODE = (DEFS + - DEFS_PACKED.replace('/*here*/', '__attribute__((packed))')) - - ffi1.cdef(DEFS) - ffi1.cdef(DEFS_PACKED, packed=True) - ffi1.set_source("test_new_ffi_1", CCODE) - - outputfilename = recompile(ffi1, "test_new_ffi_1", CCODE, - tmpdir=str(udir)) - module = imp.load_dynamic("test_new_ffi_1", outputfilename) - ffi = module.ffi - construction_params = (ffi1, CCODE) - - -class TestNewFFI1: - - def test_integer_ranges(self): - 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): - 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 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): - 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): - 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): - p = ffi.new("int[10]") - # the object was zero-initialized: - for i in range(10): - assert p[i] == 0 - - def test_array_indexing(self): - p = ffi.new("int[10]") - p[0] = 42 - p[9] = 43 - assert p[0] == 42 - assert p[9] == 43 - with pytest.raises(IndexError): - p[10] - with pytest.raises(IndexError): - p[10] = 44 - with pytest.raises(IndexError): - p[-1] - with pytest.raises(IndexError): - p[-1] = 44 - - def test_new_array_args(self): - # 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): - p = ffi.new("int[]", 10) # a single integer is the length - assert p[9] == 0 - with pytest.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 - with pytest.raises(IndexError): - p[2] - assert repr(p) == "<cdata 'int[]' owning %d bytes>" % (2*SIZE_OF_INT) - # - p = ffi.new("int[]", 0) - with pytest.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): - 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): - 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): - 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): - 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 = "<ctype '%s'>" - 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 repr *") - assert repr(p) == "<cdata 'struct repr *' owning %d bytes>" % ( - 3*SIZE_OF_SHORT) - assert repr(ffi.typeof(p)) == typerepr % "struct repr *" - # - 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 repr*") - q = ffi.cast("struct repr *", p) - assert repr(q).startswith("<cdata 'struct repr *' 0x") - assert repr(ffi.typeof(q)) == typerepr % "struct repr *" - prevrepr = repr(q) - q = q[0] - assert repr(q) == prevrepr.replace(' *', ' &') - assert repr(ffi.typeof(q)) == typerepr % "struct repr" - - def test_new_array_of_array(self): - p = ffi.new("int[3][4]") - p[0][0] = 10 - p[2][3] = 33 - assert p[0][0] == 10 - assert p[2][3] == 33 - with pytest.raises(IndexError): - p[1][-1] - - def test_constructor_array_of_array(self): - 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): - 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): - 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): - 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): - 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): - 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 - with pytest.raises(TypeError): - p[0] = None - p[0] = ffi.NULL - assert p[0] == ffi.NULL - - def test_float(self): - 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): - s = ffi.new("struct simple*") - assert s.a == s.b == s.c == 0 - s.b = -23 - assert s.b == -23 - with pytest.raises(OverflowError): - s.b = 32768 - # - s = ffi.new("struct simple*", [-2, -3]) - assert s.a == -2 - assert s.b == -3 - assert s.c == 0 - with pytest.raises((AttributeError, TypeError)): - del s.a - assert repr(s) == "<cdata 'struct simple *' owning %d bytes>" % ( - SIZE_OF_INT + 2 * SIZE_OF_SHORT) - # - py.test.raises(ValueError, ffi.new, "struct simple*", [1, 2, 3, 4]) - - def test_constructor_struct_from_dict(self): - s = ffi.new("struct simple*", {'b': 123, 'c': 456}) - assert s.a == 0 - assert s.b == 123 - assert s.c == 456 - py.test.raises(KeyError, ffi.new, "struct simple*", {'d': 456}) - - def test_struct_pointer(self): - s = ffi.new("struct simple*") - assert s[0].a == s[0].b == s[0].c == 0 - s[0].b = -23 - assert s[0].b == s.b == -23 - with pytest.raises(OverflowError): - s[0].b = -32769 - with pytest.raises(IndexError): - s[1] - - def test_struct_opaque(self): - py.test.raises(ffi.error, ffi.new, "struct baz*") - # should 'ffi.new("struct baz **") work? it used to, but it was - # not particularly useful... - py.test.raises(ffi.error, ffi.new, "struct baz**") - - def test_pointer_to_struct(self): - s = ffi.new("struct simple *") - s.a = -42 - assert s[0].a == -42 - p = ffi.new("struct simple **", 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): - s = ffi.new("struct array *", [[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): - s = ffi.new("struct recursive*") - t = ffi.new("struct recursive*") - s.value = 123 - s.next = t - t.value = 456 - assert s.value == 123 - assert s.next.value == 456 - - def test_union_simple(self): - u = ffi.new("union simple_u*") - assert u.a == u.b == u.c == 0 - u.b = -23 - assert u.b == -23 - assert u.a != 0 - with pytest.raises(OverflowError): - u.b = 32768 - # - u = ffi.new("union simple_u*", [-2]) - assert u.a == -2 - with pytest.raises((AttributeError, TypeError)): - del u.a - assert repr(u) == "<cdata 'union simple_u *' owning %d bytes>" % ( - SIZE_OF_INT,) - - def test_union_opaque(self): - py.test.raises(ffi.error, ffi.new, "union baz*") - # should 'ffi.new("union baz **") work? it used to, but it was - # not particularly useful... - py.test.raises(ffi.error, ffi.new, "union baz**") - - def test_union_initializer(self): - py.test.raises(TypeError, ffi.new, "union init_u*", b'A') - py.test.raises(TypeError, ffi.new, "union init_u*", 5) - py.test.raises(ValueError, ffi.new, "union init_u*", [b'A', 5]) - u = ffi.new("union init_u*", [b'A']) - assert u.a == b'A' - py.test.raises(TypeError, ffi.new, "union init_u*", [1005]) - u = ffi.new("union init_u*", {'b': 12345}) - assert u.b == 12345 - u = ffi.new("union init_u*", []) - assert u.a == b'\x00' - assert u.b == 0 - - def test_sizeof_type(self): - for c_type, expected_size in [ - ('char', 1), - ('unsigned int', 4), - ('char *', SIZE_OF_PTR), - ('int[5]', 20), - ('struct four_s', 12), - ('union four_u', 4), - ]: - size = ffi.sizeof(c_type) - assert size == expected_size, (size, expected_size, ctype) - - def test_sizeof_cdata(self): - 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): - 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): - 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): - 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" - with pytest.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): - 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" - with pytest.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, in the declaration of 'struct string' - t = ffi.new("const char[]", b"testing") - s = ffi.new("struct string*", [t]) - assert type(s.name) not in (bytes, str, unicode) - assert ffi.string(s.name) == b"testing" - with pytest.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 - self.check_wchar_t(ffi) - t = ffi.new("const wchar_t[]", u+"testing") - s = ffi.new("struct ustring*", [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): - 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] - with pytest.raises(TypeError): - vp[0] - py.test.raises(TypeError, ffi.new, "short **", a) - # - s = ffi.new("struct voidp *") - s.p = a # works - s.q = a # works - with pytest.raises(TypeError): - s.r = a # fails - b = ffi.cast("int *", a) - s.p = b # works - s.q = b # works - with pytest.raises(TypeError): - s.r = b # fails - - def test_functionptr_simple(self): - 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) - with pytest.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): - t = ffi.typeof("int(*(*)(int))(int)") - assert repr(t) == "<ctype '%s'>" % "int(*(*)(int))(int)" - - def test_functionptr_voidptr_return(self): - 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): - 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): - def foo(): - pass - foo_cb = ffi.callback("void foo()", foo) - result = foo_cb() - assert result is None - - def test_char_cast(self): - 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): - 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): - 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): - 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): - 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): - 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): - 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): - def cb(p): - return p[0].a * 1000 + p[0].b * 100 + p[1].a * 10 + p[1].b - a = ffi.callback("int(*)(struct ab[])", 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): - 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): - 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): - # enum foq { A0, B0, CC0, D0 }; - assert ffi.string(ffi.cast("enum foq", 0)) == "cffiA0" - assert ffi.string(ffi.cast("enum foq", 2)) == "cffiCC0" - assert ffi.string(ffi.cast("enum foq", 3)) == "cffiD0" - assert ffi.string(ffi.cast("enum foq", 4)) == "4" - # 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 foq", 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 foq", -1)) == ( # enums are unsigned, if - "<cdata 'enum foq' 4294967295>") or ( # they contain no neg value - sys.platform == "win32") # (but not on msvc) - # 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): - # enum foo2 { A3, B3, C3, D3 }; - # struct bar_with_e { enum foo2 e; }; - s = ffi.new("struct bar_with_e *") - 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 foo2", -1) - assert s.e in (4294967295, -1) # two choices - assert s[0].e in (4294967295, -1) - s.e = s.e - with pytest.raises(TypeError): - s.e = 'B3' - with pytest.raises(TypeError): - s.e = '2' - with pytest.raises(TypeError): - s.e = '#2' - with pytest.raises(TypeError): - s.e = '#7' - - def test_enum_non_contiguous(self): - # enum noncont { A4, B4=42, C4 }; - assert ffi.string(ffi.cast("enum noncont", 0)) == "A4" - assert ffi.string(ffi.cast("enum noncont", 42)) == "B4" - assert ffi.string(ffi.cast("enum noncont", 43)) == "C4" - invalid_value = ffi.cast("enum noncont", 2) - assert int(invalid_value) == 2 - assert ffi.string(invalid_value) == "2" - - def test_enum_char_hex_oct(self): - # enum etypes {A5='!', B5='\'', C5=0x10, D5=010, E5=- 0x10, F5=-010}; - assert ffi.string(ffi.cast("enum etypes", ord('!'))) == "A5" - assert ffi.string(ffi.cast("enum etypes", ord("'"))) == "B5" - assert ffi.string(ffi.cast("enum etypes", 16)) == "C5" - assert ffi.string(ffi.cast("enum etypes", 8)) == "D5" - assert ffi.string(ffi.cast("enum etypes", -16)) == "E5" - assert ffi.string(ffi.cast("enum etypes", -8)) == "F5" - - def test_array_of_struct(self): - s = ffi.new("struct ab[1]") - with pytest.raises(AttributeError): - s.b - with pytest.raises(AttributeError): - s.b = 412 - s[0].b = 412 - assert s[0].b == 412 - with pytest.raises(IndexError): - s[1] - - def test_pointer_to_array(self): - p = ffi.new("int(**)[5]") - assert repr(p) == "<cdata 'int(* *)[5]' owning %d bytes>" % SIZE_OF_PTR - - def test_iterate_array(self): - 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): - # struct abc { int a, b, c; }; - assert ffi.offsetof("struct abc", "a") == 0 - assert ffi.offsetof("struct abc", "b") == 4 - assert ffi.offsetof("struct abc", "c") == 8 - - def test_offsetof_nested(self): - # struct nesting { struct abc d, e; }; - assert ffi.offsetof("struct nesting", "e") == 12 - py.test.raises(KeyError, ffi.offsetof, "struct nesting", "e.a") - assert ffi.offsetof("struct nesting", "e", "a") == 12 - assert ffi.offsetof("struct nesting", "e", "b") == 16 - assert ffi.offsetof("struct nesting", "e", "c") == 20 - - def test_offsetof_array(self): - assert ffi.offsetof("int[]", 51) == 51 * ffi.sizeof("int") - assert ffi.offsetof("int *", 51) == 51 * ffi.sizeof("int") - # struct array2 { int a, b; int c[99]; }; - assert ffi.offsetof("struct array2", "c") == 2 * ffi.sizeof("int") - assert ffi.offsetof("struct array2", "c", 0) == 2 * ffi.sizeof("int") - assert ffi.offsetof("struct array2", "c", 51) == 53 * ffi.sizeof("int") - - def test_alignof(self): - # struct align { char a; short b; char c; }; - assert ffi.alignof("int") == 4 - assert ffi.alignof("double") in (4, 8) - assert ffi.alignof("struct align") == 2 - - def test_bitfield(self): - # struct bitfield { int a:10, b:20, c:3; }; - assert ffi.sizeof("struct bitfield") == 8 - s = ffi.new("struct bitfield *") - s.a = 511 - with pytest.raises(OverflowError): - s.a = 512 - with pytest.raises(OverflowError): - s[0].a = 512 - assert s.a == 511 - s.a = -512 - with pytest.raises(OverflowError): - s.a = -513 - with pytest.raises(OverflowError): - s[0].a = -513 - assert s.a == -512 - s.c = 3 - assert s.c == 3 - with pytest.raises(OverflowError): - s.c = 4 - with pytest.raises(OverflowError): - s[0].c = 4 - s.c = -4 - assert s.c == -4 - - def test_bitfield_enum(self): - # typedef enum { AA1, BB1, CC1 } foo_e_t; - # typedef struct { foo_e_t f:2; } bfenum_t; - if sys.platform == "win32": - py.test.skip("enums are not unsigned") - s = ffi.new("bfenum_t *") - s.f = 2 - assert s.f == 2 - - def test_anonymous_struct(self): - # typedef struct { int a; } anon_foo_t; - # typedef struct { char b, c; } anon_bar_t; - f = ffi.new("anon_foo_t *", [12345]) - b = ffi.new("anon_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 'anon_bar_t *'") - - def test_struct_with_two_usages(self): - # typedef struct named_foo_s { int a; } named_foo_t, *named_foo_p; - # typedef struct { int a; } unnamed_foo_t, *unnamed_foo_p; - f = ffi.new("named_foo_t *", [12345]) - ps = ffi.new("named_foo_p[]", [f]) - f = ffi.new("unnamed_foo_t *", [12345]) - ps = ffi.new("unnamed_foo_p[]", [f]) - - def test_pointer_arithmetic(self): - 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): - 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): - 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): - a = ffi.new("short *", 100) - try: - b = ffi.buffer(a) - except NotImplementedError as e: - py.test.skip(str(e)) - 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): - 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): - 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): - 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): - 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() == arraytostring(array.array('i', range(1000))) - 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): - 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() == arraytostring(array.array('i', range(1000))) - 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_array_in_struct(self): - # struct array { int a[2]; char b[3]; }; - p = ffi.new("struct array *") - p.a[1] = 5 - assert p.a[1] == 5 - assert repr(p.a).startswith("<cdata 'int[2]' 0x") - - def test_struct_containing_array_varsize_workaround(self): - if sys.platform == "win32": - py.test.skip("array of length 0 not supported") - # struct array0 { int len; short data[0]; }; - p = ffi.new("char[]", ffi.sizeof("struct array0") + 7 * SIZE_OF_SHORT) - q = ffi.cast("struct array0 *", 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.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 - with pytest.raises(IndexError): - p.data[10] - - def test_ffi_typeof_getcname(self): - 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): - f = ffi.cast("int(*)(int)", 42) - assert f != ffi.NULL - py.test.raises(ffi.error, ffi.cast, "int(int)", 42) - py.test.raises(ffi.error, 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. - 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 '...'") - 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.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_anonymous_enum(self): - # typedef enum { Value0 = 0 } e_t, *pe_t; - assert ffi.getctype("e_t*") == 'e_t *' - assert ffi.getctype("pe_t") == 'e_t *' - assert ffi.getctype("foo_e_t*") == 'foo_e_t *' - - def test_new_ctype(self): - 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): - # enum e_noninj { AA3=0, BB3=0, CC3=0, DD3=0 }; - e = ffi.cast("enum e_noninj", 0) - assert ffi.string(e) == "AA3" # pick the first one arbitrarily - - def test_enum_refer_previous_enum_value(self): - # enum e_prev { AA4, BB4=2, CC4=4, DD4=BB4, EE4, FF4=CC4, GG4=FF4 }; - assert ffi.string(ffi.cast("enum e_prev", 2)) == "BB4" - assert ffi.string(ffi.cast("enum e_prev", 3)) == "EE4" - assert ffi.sizeof("char[DD4]") == 2 - assert ffi.sizeof("char[EE4]") == 3 - assert ffi.sizeof("char[FF4]") == 4 - assert ffi.sizeof("char[GG4]") == 4 - - def test_nested_anonymous_struct(self): - # struct nested_anon { - # struct { int a, b; }; - # union { int c, d; }; - # }; - assert ffi.sizeof("struct nested_anon") == 3 * SIZE_OF_INT - p = ffi.new("struct nested_anon *", [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 nested_anon *", {'b': 12, 'd': 14}) - assert p.a == 0 - assert p.b == 12 - assert p.c == 14 - assert p.d == 14 - - def test_nested_field_offset_align(self): - # struct nested_field_ofs_s { - # struct { int a; char b; }; - # union { char c; }; - # }; - assert ffi.offsetof("struct nested_field_ofs_s", "c") == 2 * SIZE_OF_INT - assert ffi.sizeof("struct nested_field_ofs_s") == 3 * SIZE_OF_INT - - def test_nested_anonymous_union(self): - # union nested_anon_u { - # struct { int a, b; }; - # union { int c, d; }; - # }; - assert ffi.sizeof("union nested_anon_u") == 2 * SIZE_OF_INT - p = ffi.new("union nested_anon_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 nested_anon_u *", {'d': 14}) - assert p.a == 14 - assert p.b == 0 - assert p.c == 14 - assert p.d == 14 - p = ffi.new("union nested_anon_u *", {'b': 12}) - assert p.a == 0 - assert p.b == 12 - assert p.c == 0 - assert p.d == 0 - # we cannot specify several items in the dict, even though - # in theory in this particular case it would make sense - # to give both 'a' and 'b' - - def test_cast_to_array_type(self): - 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): - 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=destructor) - import gc; gc.collect() - assert seen == [] - del q - import gc; gc.collect(); gc.collect(); gc.collect() - assert seen == [1] - - def test_gc_2(self): - 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): - 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): - 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_release(self): - p = ffi.new("int[]", 123) - ffi.release(p) - # here, reading p[0] might give garbage or segfault... - ffi.release(p) # no effect - - def test_release_new_allocator(self): - seen = [] - def myalloc(size): - seen.append(size) - return ffi.new("char[]", b"X" * size) - def myfree(raw): - seen.append(raw) - alloc2 = ffi.new_allocator(alloc=myalloc, free=myfree) - p = alloc2("int[]", 15) - assert seen == [15 * 4] - ffi.release(p) - assert seen == [15 * 4, p] - ffi.release(p) # no effect - assert seen == [15 * 4, p] - # - del seen[:] - p = alloc2("struct ab *") - assert seen == [2 * 4] - ffi.release(p) - assert seen == [2 * 4, p] - ffi.release(p) # no effect - assert seen == [2 * 4, p] - - def test_CData_CType(self): - 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): - assert isinstance(ffi.typeof("int"), ffi.CType) - - def test_bool(self): - 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_addressof(self): - p = ffi.new("struct ab *") - a = ffi.addressof(p[0]) - assert repr(a).startswith("<cdata 'struct ab *' 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): - p = ffi.new("struct ab *") - b = ffi.addressof(p[0], 'b') - assert repr(b).startswith("<cdata 'int *' 0x") - assert int(ffi.cast("uintptr_t", b)) == ( - int(ffi.cast("uintptr_t", p)) + ffi.sizeof("int")) - assert b == ffi.addressof(p, 'b') - assert b != ffi.addressof(p, 'a') - - def test_addressof_field_nested(self): - # struct nesting { struct abc d, e; }; - p = ffi.new("struct nesting *") - py.test.raises(KeyError, ffi.addressof, p[0], 'e.b') - a = ffi.addressof(p[0], 'e', 'b') - assert int(ffi.cast("uintptr_t", a)) == ( - int(ffi.cast("uintptr_t", p)) + - ffi.sizeof("struct abc") + ffi.sizeof("int")) - - def test_addressof_anonymous_struct(self): - # typedef struct { int a; } anon_foo_t; - p = ffi.new("anon_foo_t *") - a = ffi.addressof(p[0]) - assert a == p - - def test_addressof_array(self): - 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): - 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) - # - array = ffi.new("struct ab[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): - # struct abc50 { int a, b; int c[50]; }; - p = ffi.new("struct abc50 *") - 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 abc50 *") - assert p2 == p + 1 - - def test_multiple_independent_structs(self): - CDEF2 = "struct ab { int x; };" - ffi2 = cffi.FFI(); ffi2.cdef(CDEF2) - outputfilename = recompile(ffi2, "test_multiple_independent_structs", - CDEF2, tmpdir=str(udir)) - module = imp.load_dynamic("test_multiple_independent_structs", - outputfilename) - ffi1 = module.ffi - foo1 = ffi1.new("struct ab *", [10]) - foo2 = ffi .new("struct ab *", [20, 30]) - assert foo1.x == 10 - assert foo2.a == 20 - assert foo2.b == 30 - - def test_include_struct_union_enum_typedef(self): - ffi1, CCODE = construction_params - ffi2 = cffi.FFI() - ffi2.include(ffi1) - outputfilename = recompile(ffi2, - "test_include_struct_union_enum_typedef", - CCODE, tmpdir=str(udir)) - module = imp.load_dynamic("test_include_struct_union_enum_typedef", - outputfilename) - ffi2 = module.ffi - # - p = ffi2.new("struct nonpacked *", [b'A', -43141]) - assert p.a == b'A' - assert p.b == -43141 - # - p = ffi.new("union simple_u *", [-52525]) - assert p.a == -52525 - # - p = ffi.cast("enum foq", 2) - assert ffi.string(p) == "cffiCC0" - assert ffi2.sizeof("char[cffiCC0]") == 2 - # - p = ffi.new("anon_foo_t *", [-52526]) - assert p.a == -52526 - p = ffi.new("named_foo_p", [-52527]) - assert p.a == -52527 - - def test_struct_packed(self): - # struct nonpacked { char a; int b; }; - # struct is_packed { char a; int b; } __attribute__((packed)); - assert ffi.sizeof("struct nonpacked") == 8 - assert ffi.sizeof("struct is_packed") == 5 - assert ffi.alignof("struct nonpacked") == 4 - assert ffi.alignof("struct is_packed") == 1 - s = ffi.new("struct is_packed[2]") - 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_not_supported_bitfield_in_result(self): - # struct ints_and_bitfield { int a,b,c,d,e; int x:1; }; - e = py.test.raises(NotImplementedError, ffi.callback, - "struct ints_and_bitfield foo(void)", lambda: 42) - assert str(e.value) == ("struct ints_and_bitfield(*)(): " - "callback with unsupported argument or return type or with '...'") - - def test_inspecttype(self): - assert ffi.typeof("long").kind == "primitive" - assert ffi.typeof("long(*)(long, long**, ...)").cname == ( - "long(*)(long, long * *, ...)") - assert ffi.typeof("long(*)(long, long**, ...)").ellipsis is True - - def test_new_handle(self): - o = [2, 3, 4] - p = ffi.new_handle(o) - assert ffi.typeof(p) == ffi.typeof("void *") - assert ffi.from_handle(p) is o - assert ffi.from_handle(ffi.cast("char *", p)) is o - py.test.raises(RuntimeError, ffi.from_handle, ffi.NULL) - - def test_struct_array_no_length(self): - # struct array_no_length { int x; int a[]; }; - p = ffi.new("struct array_no_length *", [100, [200, 300, 400]]) - assert p.x == 100 - assert ffi.typeof(p.a) is ffi.typeof("int[]") # length available - assert p.a[0] == 200 - assert p.a[1] == 300 - assert p.a[2] == 400 - assert len(p.a) == 3 - assert list(p.a) == [200, 300, 400] - q = ffi.cast("struct array_no_length *", p) - assert ffi.typeof(q.a) is ffi.typeof("int *") # no length available - assert q.a[0] == 200 - assert q.a[1] == 300 - assert q.a[2] == 400 - py.test.raises(TypeError, len, q.a) - py.test.raises(TypeError, list, q.a) - - def test_all_primitives(self): - assert set(PRIMITIVE_TO_INDEX) == set([ - "char", - "short", - "int", - "long", - "long long", - "signed char", - "unsigned char", - "unsigned short", - "unsigned int", - "unsigned long", - "unsigned long long", - "float", - "double", - "long double", - "wchar_t", - "char16_t", - "char32_t", - "_Bool", - "int8_t", - "uint8_t", - "int16_t", - "uint16_t", - "int32_t", - "uint32_t", - "int64_t", - "uint64_t", - "int_least8_t", - "uint_least8_t", - "int_least16_t", - "uint_least16_t", - "int_least32_t", - "uint_least32_t", - "int_least64_t", - "uint_least64_t", - "int_fast8_t", - "uint_fast8_t", - "int_fast16_t", - "uint_fast16_t", - "int_fast32_t", - "uint_fast32_t", - "int_fast64_t", - "uint_fast64_t", - "intptr_t", - "uintptr_t", - "intmax_t", - "uintmax_t", - "ptrdiff_t", - "size_t", - "ssize_t", - 'float _Complex', - 'double _Complex', - ]) - for name in PRIMITIVE_TO_INDEX: - x = ffi.sizeof(name) - assert 1 <= x <= 16 - - def test_emit_c_code(self): - ffi = cffi.FFI() - ffi.set_source("foobar", "??") - c_file = str(udir.join('test_emit_c_code')) - ffi.emit_c_code(c_file) - assert os.path.isfile(c_file) - - def test_import_from_lib(self): - ffi2 = cffi.FFI() - ffi2.cdef("int myfunc(int); extern int myvar;\n#define MYFOO ...\n") - outputfilename = recompile(ffi2, "_test_import_from_lib", - "int myfunc(int x) { return x + 1; }\n" - "int myvar = -5;\n" - "#define MYFOO 42", tmpdir=str(udir)) - imp.load_dynamic("_test_import_from_lib", outputfilename) - from _test_import_from_lib.lib import myfunc, myvar, MYFOO - assert MYFOO == 42 - assert myfunc(43) == 44 - assert myvar == -5 # but can't be changed, so not very useful - with pytest.raises(ImportError): - from _test_import_from_lib.lib import bar - d = {} - exec("from _test_import_from_lib.lib import *", d) - assert (set(key for key in d if not key.startswith('_')) == - set(['myfunc', 'MYFOO'])) - # - # also test "import *" on the module itself, which should be - # equivalent to "import ffi, lib" - d = {} - exec("from _test_import_from_lib import *", d) - assert (sorted([x for x in d.keys() if not x.startswith('__')]) == - ['ffi', 'lib']) - - def test_char16_t(self): - x = ffi.new("char16_t[]", 5) - assert len(x) == 5 and ffi.sizeof(x) == 10 - x[2] = u+'\u1324' - assert x[2] == u+'\u1324' - y = ffi.new("char16_t[]", u+'\u1234\u5678') - assert len(y) == 3 - assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00'] - assert ffi.string(y) == u+'\u1234\u5678' - z = ffi.new("char16_t[]", u+'\U00012345') - assert len(z) == 3 - assert list(z) == [u+'\ud808', u+'\udf45', u+'\x00'] - assert ffi.string(z) == u+'\U00012345' - - def test_char32_t(self): - x = ffi.new("char32_t[]", 5) - assert len(x) == 5 and ffi.sizeof(x) == 20 - x[3] = u+'\U00013245' - assert x[3] == u+'\U00013245' - y = ffi.new("char32_t[]", u+'\u1234\u5678') - assert len(y) == 3 - assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00'] - z = ffi.new("char32_t[]", u+'\U00012345') - assert len(z) == 2 - assert list(z) == [u+'\U00012345', u+'\x00'] # maybe a 2-unichars strin - assert ffi.string(z) == u+'\U00012345' |