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from __future__ import division, absolute_import, print_function
import math
import textwrap
import sys
import pytest
import numpy as np
from numpy.testing import assert_, assert_equal
from . import util
class TestF77Callback(util.F2PyTest):
code = """
subroutine t(fun,a)
integer a
cf2py intent(out) a
external fun
call fun(a)
end
subroutine func(a)
cf2py intent(in,out) a
integer a
a = a + 11
end
subroutine func0(a)
cf2py intent(out) a
integer a
a = 11
end
subroutine t2(a)
cf2py intent(callback) fun
integer a
cf2py intent(out) a
external fun
call fun(a)
end
subroutine string_callback(callback, a)
external callback
double precision callback
double precision a
character*1 r
cf2py intent(out) a
r = 'r'
a = callback(r)
end
subroutine string_callback_array(callback, cu, lencu, a)
external callback
integer callback
integer lencu
character*8 cu(lencu)
integer a
cf2py intent(out) a
a = callback(cu, lencu)
end
"""
@pytest.mark.slow
@pytest.mark.parametrize('name', 't,t2'.split(','))
def test_all(self, name):
self.check_function(name)
@pytest.mark.slow
def test_docstring(self):
expected = """
a = t(fun,[fun_extra_args])
Wrapper for ``t``.
Parameters
----------
fun : call-back function
Other Parameters
----------------
fun_extra_args : input tuple, optional
Default: ()
Returns
-------
a : int
Notes
-----
Call-back functions::
def fun(): return a
Return objects:
a : int
"""
assert_equal(self.module.t.__doc__, textwrap.dedent(expected).lstrip())
def check_function(self, name):
t = getattr(self.module, name)
r = t(lambda: 4)
assert_(r == 4, repr(r))
r = t(lambda a: 5, fun_extra_args=(6,))
assert_(r == 5, repr(r))
r = t(lambda a: a, fun_extra_args=(6,))
assert_(r == 6, repr(r))
r = t(lambda a: 5 + a, fun_extra_args=(7,))
assert_(r == 12, repr(r))
r = t(lambda a: math.degrees(a), fun_extra_args=(math.pi,))
assert_(r == 180, repr(r))
r = t(math.degrees, fun_extra_args=(math.pi,))
assert_(r == 180, repr(r))
r = t(self.module.func, fun_extra_args=(6,))
assert_(r == 17, repr(r))
r = t(self.module.func0)
assert_(r == 11, repr(r))
r = t(self.module.func0._cpointer)
assert_(r == 11, repr(r))
class A(object):
def __call__(self):
return 7
def mth(self):
return 9
a = A()
r = t(a)
assert_(r == 7, repr(r))
r = t(a.mth)
assert_(r == 9, repr(r))
@pytest.mark.skipif(sys.platform=='win32',
reason='Fails with MinGW64 Gfortran (Issue #9673)')
def test_string_callback(self):
def callback(code):
if code == 'r':
return 0
else:
return 1
f = getattr(self.module, 'string_callback')
r = f(callback)
assert_(r == 0, repr(r))
@pytest.mark.skipif(sys.platform=='win32',
reason='Fails with MinGW64 Gfortran (Issue #9673)')
def test_string_callback_array(self):
# See gh-10027
cu = np.zeros((1, 8), 'S1')
def callback(cu, lencu):
if cu.shape != (lencu, 8):
return 1
if cu.dtype != 'S1':
return 2
if not np.all(cu == b''):
return 3
return 0
f = getattr(self.module, 'string_callback_array')
res = f(callback, cu, len(cu))
assert_(res == 0, repr(res))
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