1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
# Authors: The scikit-learn developers
# SPDX-License-Identifier: BSD-3-Clause
from libc.math cimport isnan, isinf
from cython cimport floating
cpdef enum FiniteStatus:
all_finite = 0
has_nan = 1
has_infinite = 2
def cy_isfinite(floating[::1] a, bint allow_nan=False):
cdef FiniteStatus result
with nogil:
result = _isfinite(a, allow_nan)
return result
cdef inline FiniteStatus _isfinite(floating[::1] a, bint allow_nan) noexcept nogil:
cdef floating* a_ptr = &a[0]
cdef Py_ssize_t length = len(a)
if allow_nan:
return _isfinite_allow_nan(a_ptr, length)
else:
return _isfinite_disable_nan(a_ptr, length)
cdef inline FiniteStatus _isfinite_allow_nan(floating* a_ptr,
Py_ssize_t length) noexcept nogil:
cdef Py_ssize_t i
cdef floating v
for i in range(length):
v = a_ptr[i]
if isinf(v):
return FiniteStatus.has_infinite
return FiniteStatus.all_finite
cdef inline FiniteStatus _isfinite_disable_nan(floating* a_ptr,
Py_ssize_t length) noexcept nogil:
cdef Py_ssize_t i
cdef floating v
for i in range(length):
v = a_ptr[i]
if isnan(v):
return FiniteStatus.has_nan
elif isinf(v):
return FiniteStatus.has_infinite
return FiniteStatus.all_finite
|
