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import pytest
from pypy.interpreter.error import OperationError
from pypy.module.cpyext.test.test_api import BaseApiTest
from pypy.module.cpyext.test.test_cpyext import AppTestCpythonExtensionBase
from rpython.rtyper.lltypesystem import rffi
from pypy.module.cpyext.floatobject import (
PyFloat_FromDouble, PyFloat_AsDouble, PyFloat_AS_DOUBLE, PyNumber_Float,
_PyFloat_Unpack4, _PyFloat_Unpack8)
class TestFloatObject(BaseApiTest):
def test_floatobject(self, space):
assert space.unwrap(PyFloat_FromDouble(space, 3.14)) == 3.14
assert PyFloat_AsDouble(space, space.wrap(23.45)) == 23.45
assert PyFloat_AS_DOUBLE(space, space.wrap(23.45)) == 23.45
with pytest.raises(OperationError):
PyFloat_AsDouble(space, space.w_None)
def test_coerce(self, space):
assert space.type(PyNumber_Float(space, space.wrap(3))) is space.w_float
assert space.type(PyNumber_Float(space, space.wrap("3"))) is space.w_float
w_obj = space.appexec([], """():
class Coerce(object):
def __float__(self):
return 42.5
return Coerce()""")
assert space.eq_w(PyNumber_Float(space, w_obj), space.wrap(42.5))
def test_unpack(self, space):
with rffi.scoped_str2charp("\x9a\x99\x99?") as ptr:
assert abs(_PyFloat_Unpack4(space, ptr, 1) - 1.2) < 1e-7
with rffi.scoped_str2charp("?\x99\x99\x9a") as ptr:
assert abs(_PyFloat_Unpack4(space, ptr, 0) - 1.2) < 1e-7
with rffi.scoped_str2charp("\x1f\x85\xebQ\xb8\x1e\t@") as ptr:
assert abs(_PyFloat_Unpack8(space, ptr, 1) - 3.14) < 1e-15
with rffi.scoped_str2charp("@\t\x1e\xb8Q\xeb\x85\x1f") as ptr:
assert abs(_PyFloat_Unpack8(space, ptr, 0) - 3.14) < 1e-15
class AppTestFloatObject(AppTestCpythonExtensionBase):
def test_fromstring(self):
module = self.import_extension('foo', [
("from_string", "METH_NOARGS",
"""
PyObject* str = PyUnicode_FromString("1234.56");
PyObject* res = PyFloat_FromString(str);
Py_DECREF(str);
return res;
"""),
])
assert module.from_string() == 1234.56
assert type(module.from_string()) is float
class AppTestFloatMacros(AppTestCpythonExtensionBase):
def test_return_nan(self):
import math
module = self.import_extension('foo', [
("return_nan", "METH_NOARGS",
"Py_RETURN_NAN;"),
])
assert math.isnan(module.return_nan())
def test_return_inf(self):
import math
module = self.import_extension('foo', [
("return_inf", "METH_NOARGS",
"Py_RETURN_INF(10);"),
])
inf = module.return_inf()
assert inf > 0
assert math.isinf(inf)
def test_return_inf_negative(self):
import math
module = self.import_extension('foo', [
("return_neginf", "METH_NOARGS",
"Py_RETURN_INF(-10);"),
])
neginf = module.return_neginf()
assert neginf < 0
assert math.isinf(neginf)
def test_macro_accepts_wrong_pointer_type(self):
module = self.import_extension('foo', [
("test_macros", "METH_NOARGS",
"""
PyObject* o = PyFloat_FromDouble(1.0);
// no PyFloatObject
char* dumb_pointer = (char*)o;
PyFloat_AS_DOUBLE(o);
PyFloat_AS_DOUBLE(dumb_pointer);
Py_RETURN_NONE;"""),
])
def test_PyFloat_Check(self):
module = self.import_extension('foo', [
("test", "METH_NOARGS",
"""
PyObject* pyobj = PyFloat_FromDouble(1.0);
PyFloatObject* pfo = (PyFloatObject*)pyobj;
int res = (PyFloat_Check(pyobj) +
PyFloat_CheckExact(pyobj) * 10 +
PyFloat_Check(pfo) * 100 +
PyFloat_CheckExact(pfo) * 1000);
Py_DecRef(pyobj);
return PyLong_FromLong(res);"""),
])
assert module.test() == 1111
def test_pymath_consts(self):
# test preprocessor constants in their string form to avoid
# floating-point conversion issues (and to avoid having to
# conditionalize on compiler support for long double)
for const_name, const_strval in [
('Py_MATH_PIl', b"3.1415926535897932384626433832795029L"),
('Py_MATH_PI', b"3.14159265358979323846"),
('Py_MATH_El', b"2.7182818284590452353602874713526625L"),
('Py_MATH_E', b"2.7182818284590452354"),
('Py_MATH_TAU', b"6.2831853071795864769252867665590057683943L"),
]:
module = self.import_extension('foo_%s' % const_name, [
("test", "METH_NOARGS",
"""
#define xstr(s) str(s)
#define str(s) #s
return PyBytes_FromString(xstr(%s));""" % const_name)
])
assert module.test() == const_strval
def test_Py_IS_NAN(self):
module = self.import_extension('foo', [
("test", "METH_O",
"""
double d = PyFloat_AsDouble(args);
return PyBool_FromLong(Py_IS_NAN(d));
"""),
])
assert not module.test(0)
assert not module.test(1)
assert not module.test(-1)
assert not module.test(float('inf'))
assert module.test(float('nan'))
def test_Py_IS_INFINITY(self):
module = self.import_extension('foo', [
("test", "METH_O",
"""
double d = PyFloat_AsDouble(args);
return PyBool_FromLong(Py_IS_INFINITY(d));
"""),
])
assert not module.test(0)
assert not module.test(1)
assert not module.test(-1)
assert not module.test(float('nan'))
assert module.test(float('inf'))
assert module.test(float('-inf'))
def test_Py_IS_FINITE(self):
module = self.import_extension('foo', [
("test", "METH_O",
"""
double d = PyFloat_AsDouble(args);
return PyBool_FromLong(Py_IS_FINITE(d));
"""),
])
assert module.test(0)
assert module.test(1)
assert module.test(-1)
assert not module.test(float('nan'))
assert not module.test(float('inf'))
assert not module.test(float('-inf'))
def test_Py_Float_AsDouble_err(self):
module = self.import_extension('foo', [
("test", "METH_O",
"""
double d = PyFloat_AsDouble(args);
if (PyErr_Occurred()) {
return NULL;
}
return PyFloat_FromDouble(d);
"""),
])
try:
module.test([])
except Exception as e:
print(str(e))
assert str(e) == 'must be real number, not list'
else:
assert False
def test_Py_HUGE_VAL(self):
module = self.import_extension('foo', [
("test", "METH_NOARGS",
"""
return PyFloat_FromDouble(Py_HUGE_VAL);
"""),
])
assert module.test() == float('inf')
def test_Py_NAN(self):
import sys
module = self.import_extension('foo', [
("test", "METH_NOARGS",
"""
return PyFloat_FromDouble(Py_NAN);
"""),
])
if sys.platform == 'win32':
# CPython does not enforce bit-compatibility between the NANs
import math
assert math.isnan(module.test())
else:
import struct
float_bits = struct.Struct('d').pack
assert float_bits(module.test()) == float_bits(float('nan'))
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