def test_functionptr_simple(self):
ffi = FFI(backend=self.Backend())
py.test.raises(TypeError, ffi.callback, "int(*)(int)")
py.test.raises(TypeError, ffi.callback, "int(*)(int)", 0)
def cb(n):
return n + 1
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) == "<cdata 'int(*)(int)'>"
res = q(45)
assert res == 46
def test_function_has_a_c_type(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
""")
fptr = ffi.C.puts
assert ffi.typeof(fptr) == ffi.typeof("int(*)(const char*)")
if self.Backend is CTypesBackend:
assert repr(fptr) == "<cdata 'int puts(char *)'>"
def test_function_has_a_c_type(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
""")
fptr = ffi.C.puts
assert ffi.typeof(fptr) == ffi.typeof("int(*)(const char*)")
if self.Backend is CTypesBackend:
assert repr(fptr) == "<cdata 'int puts(char *)'>"
def test_typedef_more_complex():
ffi = FFI(backend=FakeBackend())
ffi.cdef("""
typedef struct { int a, b; } foo_t, *foo_p;
int foo(foo_p[]);
""")
assert str(ffi.typeof("foo_t")) == '<int>a, <int>b'
assert ffi.typeof("foo_p") == '<pointer to <int>a, <int>b>'
assert ffi.C.foo.BType == ('<func (<pointer to <pointer to '
'<int>a, <int>b>>), <int>, False>')
def test_typedef_more_complex():
ffi = FFI(backend=FakeBackend())
ffi.cdef("""
typedef struct { int a, b; } foo_t, *foo_p;
int foo(foo_p[]);
""")
assert str(ffi.typeof("foo_t")) == '<int>a, <int>b'
assert ffi.typeof("foo_p") == '<pointer to <int>a, <int>b>'
assert ffi.C.foo.BType == ('<func (<pointer to <pointer to '
'<int>a, <int>b>>), <int>, False>')
def test_char_cast(self):
ffi = FFI(backend=self.Backend())
p = ffi.cast("int", '\x01')
assert ffi.typeof(p) is ffi.typeof("int")
assert int(p) == 1
p = ffi.cast("int", ffi.cast("char", "a"))
assert int(p) == ord("a")
p = ffi.cast("int", ffi.cast("char", "\x80"))
assert int(p) == 0x80 # "char" is considered unsigned in this case
p = ffi.cast("int", "\x81")
assert int(p) == 0x81
def test_char_cast(self):
ffi = FFI(backend=self.Backend())
p = ffi.cast("int", '\x01')
assert ffi.typeof(p) is ffi.typeof("int")
assert int(p) == 1
p = ffi.cast("int", ffi.cast("char", "a"))
assert int(p) == ord("a")
p = ffi.cast("int", ffi.cast("char", "\x80"))
assert int(p) == 0x80 # "char" is considered unsigned in this case
p = ffi.cast("int", "\x81")
assert int(p) == 0x81
def test_typedef():
ffi = FFI(backend=FakeBackend())
ffi.cdef("""
typedef unsigned int UInt;
typedef UInt UIntReally;
UInt foo(void);
""")
assert ffi.typeof("UIntReally") == '<unsigned int>'
assert ffi.C.foo.BType == '<func (), <unsigned int>, False>'
def test_typedef():
ffi = FFI(backend=FakeBackend())
ffi.cdef("""
typedef unsigned int UInt;
typedef UInt UIntReally;
UInt foo(void);
""")
assert ffi.typeof("UIntReally") == '<unsigned int>'
assert ffi.C.foo.BType == '<func (), <unsigned int>, False>'
def test_functionptr_simple(self):
ffi = FFI(backend=self.Backend())
py.test.raises(TypeError, ffi.callback, "int(*)(int)")
py.test.raises(TypeError, ffi.callback, "int(*)(int)", 0)
def cb(n):
return n + 1
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) == "<cdata 'int(*)(int)'>"
res = q(45)
assert res == 46
def test_typeof():
ffi = FFI(backend=FakeBackend())
clong = ffi.typeof("signed long int")
assert isinstance(clong, FakePrimitiveType)
assert clong.cdecl == 'long'
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_repr(self):
typerepr = self.TypeRepr
ffi = FFI(backend=self.Backend())
ffi.cdef("struct foo { short a, b, c; };")
p = ffi.cast("unsigned short int", 0)
assert repr(p) == "<cdata 'unsigned short'>"
assert repr(ffi.typeof(p)) == typerepr % "unsigned short"
p = ffi.cast("int*", 0)
assert repr(p) == "<cdata 'int *'>"
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'>"
assert repr(ffi.typeof(q)) == typerepr % "short"
p = ffi.new("int")
q = ffi.cast("short*", p)
assert repr(q) == "<cdata 'short *'>"
assert repr(ffi.typeof(q)) == typerepr % "short *"
p = ffi.new("int [2]")
q = ffi.cast("int*", p)
assert repr(q) == "<cdata 'int *'>"
assert repr(ffi.typeof(q)) == typerepr % "int *"
p = ffi.new("struct foo")
q = ffi.cast("struct foo *", p)
assert repr(q) == "<cdata 'struct foo *'>"
assert repr(ffi.typeof(q)) == typerepr % "struct foo *"
q = q[0]
assert repr(q) == "<cdata 'struct foo'>"
assert repr(ffi.typeof(q)) == typerepr % "struct foo"
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_repr(self):
typerepr = self.TypeRepr
ffi = FFI(backend=self.Backend())
ffi.cdef("struct foo { short a, b, c; };")
p = ffi.cast("unsigned short int", 0)
assert repr(p) == "<cdata 'unsigned short'>"
assert repr(ffi.typeof(p)) == typerepr % "unsigned short"
p = ffi.cast("int*", 0)
assert repr(p) == "<cdata 'int *'>"
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'>"
assert repr(ffi.typeof(q)) == typerepr % "short"
p = ffi.new("int")
q = ffi.cast("short*", p)
assert repr(q) == "<cdata 'short *'>"
assert repr(ffi.typeof(q)) == typerepr % "short *"
p = ffi.new("int [2]")
q = ffi.cast("int*", p)
assert repr(q) == "<cdata 'int *'>"
assert repr(ffi.typeof(q)) == typerepr % "int *"
p = ffi.new("struct foo")
q = ffi.cast("struct foo *", p)
assert repr(q) == "<cdata 'struct foo *'>"
assert repr(ffi.typeof(q)) == typerepr % "struct foo *"
q = q[0]
assert repr(q) == "<cdata 'struct foo'>"
assert repr(ffi.typeof(q)) == typerepr % "struct foo"
def test_typeof():
ffi = FFI(backend=FakeBackend())
clong = ffi.typeof("signed long int")
assert isinstance(clong, FakePrimitiveType)
assert clong.cdecl == 'long'