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import sys, os, imp, math, shutil
import py
from cffi import FFI, FFIError
from cffi.verifier import Verifier, _locate_engine_class, _get_so_suffixes
from cffi.ffiplatform import maybe_relative_path
from testing.udir import udir
class DistUtilsTest(object):
def setup_class(self):
self.lib_m = "m"
if sys.platform == 'win32':
#there is a small chance this fails on Mingw via environ $CC
import distutils.ccompiler
if distutils.ccompiler.get_default_compiler() == 'msvc':
self.lib_m = 'msvcrt'
def teardown_class(self):
if udir.isdir():
udir.remove()
def test_locate_engine_class(self):
cls = _locate_engine_class(FFI(), self.generic)
if self.generic:
# asked for the generic engine, which must not generate a
# CPython extension module
assert not cls._gen_python_module
else:
# asked for the CPython engine: check that we got it, unless
# we are running on top of PyPy, where the generic engine is
# always better
if '__pypy__' not in sys.builtin_module_names:
assert cls._gen_python_module
def test_write_source(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.write_source()
with open(v.sourcefilename, 'r') as f:
data = f.read()
assert csrc in data
def test_write_source_explicit_filename(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.sourcefilename = filename = str(udir.join('write_source.c'))
v.write_source()
assert filename == v.sourcefilename
with open(filename, 'r') as f:
data = f.read()
assert csrc in data
def test_write_source_to_file_obj(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
f = StringIO()
v.write_source(file=f)
assert csrc in f.getvalue()
def test_compile_module(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.compile_module()
assert v.get_module_name().startswith('_cffi_')
if v.generates_python_module():
mod = imp.load_dynamic(v.get_module_name(), v.modulefilename)
assert hasattr(mod, '_cffi_setup')
def test_compile_module_explicit_filename(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!2*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
basename = self.__class__.__name__ + 'test_compile_module'
v.modulefilename = filename = str(udir.join(basename + '.so'))
v.compile_module()
assert filename == v.modulefilename
assert v.get_module_name() == basename
if v.generates_python_module():
mod = imp.load_dynamic(v.get_module_name(), v.modulefilename)
assert hasattr(mod, '_cffi_setup')
def test_name_from_checksum_of_cdef(self):
names = []
for csrc in ['double', 'double', 'float']:
ffi = FFI()
ffi.cdef("%s sin(double x);" % csrc)
v = Verifier(ffi, "#include <math.h>",
force_generic_engine=self.generic,
libraries=[self.lib_m])
names.append(v.get_module_name())
assert names[0] == names[1] != names[2]
def test_name_from_checksum_of_csrc(self):
names = []
for csrc in ['123', '123', '1234']:
ffi = FFI()
ffi.cdef("double sin(double x);")
v = Verifier(ffi, csrc, force_generic_engine=self.generic)
names.append(v.get_module_name())
assert names[0] == names[1] != names[2]
def test_load_library(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!3*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
library = v.load_library()
assert library.sin(12.3) == math.sin(12.3)
def test_verifier_args(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!4*/#include "test_verifier_args.h"\n' % self
udir.join('test_verifier_args.h').write('#include <math.h>\n')
v = Verifier(ffi, csrc, include_dirs=[str(udir)],
force_generic_engine=self.generic,
libraries=[self.lib_m])
library = v.load_library()
assert library.sin(12.3) == math.sin(12.3)
def test_verifier_object_from_ffi(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = "/*6%s*/\n#include <math.h>" % self
lib = ffi.verify(csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
assert lib.sin(12.3) == math.sin(12.3)
assert isinstance(ffi.verifier, Verifier)
with open(ffi.verifier.sourcefilename, 'r') as f:
data = f.read()
assert csrc in data
def test_extension_object(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*7%s*/' % self + '''
#include <math.h>
#ifndef TEST_EXTENSION_OBJECT
# error "define_macros missing"
#endif
'''
lib = ffi.verify(csrc, define_macros=[('TEST_EXTENSION_OBJECT', '1')],
force_generic_engine=self.generic,
libraries=[self.lib_m])
assert lib.sin(12.3) == math.sin(12.3)
v = ffi.verifier
ext = v.get_extension()
assert 'distutils.extension.Extension' in str(ext.__class__)
assert ext.sources == [maybe_relative_path(v.sourcefilename)]
assert ext.name == v.get_module_name()
assert ext.define_macros == [('TEST_EXTENSION_OBJECT', '1')]
def test_extension_forces_write_source(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there9!%s*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
assert not os.path.exists(v.sourcefilename)
v.get_extension()
assert os.path.exists(v.sourcefilename)
def test_extension_object_extra_sources(self):
ffi = FFI()
ffi.cdef("double test1eoes(double x);")
extra_source = str(udir.join('extension_extra_sources.c'))
with open(extra_source, 'w') as f:
f.write('double test1eoes(double x) { return x * 6.0; }\n')
csrc = '/*9%s*/' % self + '''
double test1eoes(double x); /* or #include "extra_sources.h" */
'''
lib = ffi.verify(csrc, sources=[extra_source],
force_generic_engine=self.generic)
assert lib.test1eoes(7.0) == 42.0
v = ffi.verifier
ext = v.get_extension()
assert 'distutils.extension.Extension' in str(ext.__class__)
assert ext.sources == [maybe_relative_path(v.sourcefilename),
extra_source]
assert ext.name == v.get_module_name()
def test_install_and_reload_module(self, targetpackage='', ext_package=''):
KEY = repr(self)
if not hasattr(os, 'fork'):
py.test.skip("test requires os.fork()")
if targetpackage:
udir.ensure(targetpackage, dir=1).ensure('__init__.py')
sys.path.insert(0, str(udir))
def make_ffi(**verifier_args):
ffi = FFI()
ffi.cdef("/* %s, %s, %s */" % (KEY, targetpackage, ext_package))
ffi.cdef("double test1iarm(double x);")
csrc = "double test1iarm(double x) { return x * 42.0; }"
lib = ffi.verify(csrc, force_generic_engine=self.generic,
ext_package=ext_package,
**verifier_args)
return ffi, lib
childpid = os.fork()
if childpid == 0:
# in the child
ffi, lib = make_ffi()
assert lib.test1iarm(1.5) == 63.0
# "install" the module by moving it into udir (/targetpackage)
if targetpackage:
target = udir.join(targetpackage)
else:
target = udir
shutil.move(ffi.verifier.modulefilename, str(target))
os._exit(0)
# in the parent
_, status = os.waitpid(childpid, 0)
if not (os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0):
raise AssertionError # see error above in subprocess
from cffi import ffiplatform
prev_compile = ffiplatform.compile
try:
if targetpackage == ext_package:
ffiplatform.compile = lambda *args: dont_call_me_any_more
# won't find it in tmpdir, but should find it correctly
# installed in udir
ffi, lib = make_ffi()
assert lib.test1iarm(0.5) == 21.0
finally:
ffiplatform.compile = prev_compile
def test_install_and_reload_module_package(self):
self.test_install_and_reload_module(targetpackage='foo_iarmp',
ext_package='foo_iarmp')
def test_install_and_reload_module_ext_package_not_found(self):
self.test_install_and_reload_module(targetpackage='foo_epnf',
ext_package='not_found')
def test_tag(self):
ffi = FFI()
ffi.cdef("/* %s test_tag */ double test1tag(double x);" % self)
csrc = "double test1tag(double x) { return x - 42.0; }"
lib = ffi.verify(csrc, force_generic_engine=self.generic,
tag='xxtest_tagxx')
assert lib.test1tag(143) == 101.0
assert '_cffi_xxtest_tagxx_' in ffi.verifier.modulefilename
def test_modulename(self):
ffi = FFI()
ffi.cdef("/* %s test_modulename */ double test1foo(double x);" % self)
csrc = "double test1foo(double x) { return x - 63.0; }"
modname = 'xxtest_modulenamexx%d' % (self.generic,)
lib = ffi.verify(csrc, force_generic_engine=self.generic,
modulename=modname)
assert lib.test1foo(143) == 80.0
suffix = _get_so_suffixes()[0]
fn1 = os.path.join(ffi.verifier.tmpdir, modname + '.c')
fn2 = os.path.join(ffi.verifier.tmpdir, modname + suffix)
assert ffi.verifier.sourcefilename == fn1
assert ffi.verifier.modulefilename == fn2
class TestDistUtilsCPython(DistUtilsTest):
generic = False
class TestDistUtilsGeneric(DistUtilsTest):
generic = True
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