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import math
import sys
from cffi import FFIBuilder
from cffi.verifier import _get_so_suffix
def _clean_modules(tmpdir, module_name):
sys.path.remove(str(tmpdir))
for name in list(sys.modules.keys()):
if name and name.endswith(module_name):
sys.modules.pop(name)
def test_ffibuilder_makelib(tmpdir):
builder = FFIBuilder("foo_ffi", str(tmpdir))
builder.cdef("""
double sin(double x);
""")
builder.makelib('foo', '#include <math.h>')
builder.write_ffi_module()
assert builder.list_built_files() == [
'foo_ffi_foo' + _get_so_suffix(),
'foo_ffi.py',
]
sys.path.append(str(tmpdir))
try:
import foo_ffi
finally:
_clean_modules(tmpdir, 'foo_ffi')
lib = foo_ffi.load_foo()
assert lib.sin(12.3) == math.sin(12.3)
def test_ffibuilder_dlopen(tmpdir):
builder = FFIBuilder("foo_ffi", str(tmpdir))
builder.cdef("""
double sin(double x);
""")
builder.add_dlopen('foo', "m")
builder.write_ffi_module()
assert builder.list_built_files() == [
'foo_ffi.py',
]
sys.path.append(str(tmpdir))
try:
import foo_ffi
finally:
_clean_modules(tmpdir, 'foo_ffi')
lib = foo_ffi.load_foo()
assert lib.sin(12.3) == math.sin(12.3)
def test_ffibuilder_makelib_and_dlopen(tmpdir):
builder = FFIBuilder("foo_ffi", str(tmpdir))
builder.cdef("""
double sin(double x);
""")
builder.makelib('foo', '#include <math.h>')
builder.add_dlopen('bar', "m")
builder.write_ffi_module()
assert builder.list_built_files() == [
'foo_ffi_foo' + _get_so_suffix(),
'foo_ffi.py',
]
sys.path.append(str(tmpdir))
try:
import foo_ffi
finally:
_clean_modules(tmpdir, 'foo_ffi')
lib_foo = foo_ffi.load_foo()
assert lib_foo.sin(12.3) == math.sin(12.3)
lib_bar = foo_ffi.load_bar()
assert lib_bar.sin(12.3) == math.sin(12.3)
def test_ffi_module_functions(tmpdir):
builder = FFIBuilder("foo_ffi", str(tmpdir))
builder.cdef("""
double sin(double x);
""")
builder.makelib('foo', '#include <math.h>')
builder.write_ffi_module()
sys.path.append(str(tmpdir))
try:
import foo_ffi
finally:
_clean_modules(tmpdir, 'foo_ffi')
assert foo_ffi.typeof == foo_ffi._ffi.typeof
assert foo_ffi.sizeof == foo_ffi._ffi.sizeof
assert foo_ffi.alignof == foo_ffi._ffi.alignof
assert foo_ffi.offsetof == foo_ffi._ffi.offsetof
assert foo_ffi.new == foo_ffi._ffi.new
assert foo_ffi.cast == foo_ffi._ffi.cast
assert foo_ffi.string == foo_ffi._ffi.string
assert foo_ffi.buffer == foo_ffi._ffi.buffer
assert foo_ffi.callback == foo_ffi._ffi.callback
assert foo_ffi.getctype == foo_ffi._ffi.getctype
assert foo_ffi.gc == foo_ffi._ffi.gc
foo_ffi.set_errno(7)
assert foo_ffi.get_errno() == 7
assert foo_ffi.addressof == foo_ffi._ffi.addressof
assert foo_ffi.new_handle == foo_ffi._ffi.new_handle
assert foo_ffi.from_handle == foo_ffi._ffi.from_handle
def test_ffi_do_some_stuff(tmpdir):
builder = FFIBuilder("foo_ffi", str(tmpdir))
builder.cdef("""
enum ee { EE1, EE2, EE3, ... };
struct foo_s { int x; int y; };
int grid_distance(struct foo_s offset);
""")
builder.makelib('foo', """
enum ee { EE1=10, EE2, EE3=-10, EE4 };
struct foo_s { int x; int y; };
int grid_distance(struct foo_s offset) {
return offset.x + offset.y;
}
""")
builder.write_ffi_module()
sys.path.append(str(tmpdir))
try:
import foo_ffi
finally:
_clean_modules(tmpdir, 'foo_ffi')
my_struct = foo_ffi.new('struct foo_s *', {'x': 1, 'y': 2})
assert foo_ffi.typeof(my_struct) == foo_ffi.typeof("struct foo_s *")
assert foo_ffi.sizeof('struct foo_s') == 2 * foo_ffi.sizeof('int')
assert foo_ffi.alignof('struct foo_s') == foo_ffi.sizeof('int')
assert foo_ffi.typeof(foo_ffi.cast('long', 42)) == foo_ffi.typeof('long')
assert foo_ffi.string(foo_ffi.new('char *', b"\x00")) == b""
assert foo_ffi.string(foo_ffi.cast('enum ee', 11)) == "EE2"
assert foo_ffi.string(foo_ffi.cast('enum ee', -10)) == "EE3"
def cb(n):
return n + 1
f = foo_ffi.callback("int(*)(int)", cb)
assert f(1) == 2
lib = foo_ffi.load_foo()
assert lib.grid_distance(my_struct[0]) == 3
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