Fix PyArray_SearchSorted signature (GH-3606)

Cython/Includes/numpy/__init__.pxd

@@ -341,7 +341,6 @@ cdef extern from "numpy/arrayobject.h":
                 PyObject_Free(info.strides)
                 # info.shape was stored after info.strides in the same block
 
-
     ctypedef unsigned char      npy_bool
 
     ctypedef signed char      npy_byte
@@ -686,7 +685,7 @@ cdef extern from "numpy/arrayobject.h":
     object PyArray_Choose (ndarray, object, ndarray, NPY_CLIPMODE)
     int PyArray_Sort (ndarray, int, NPY_SORTKIND)
     object PyArray_ArgSort (ndarray, int, NPY_SORTKIND)
-    object PyArray_SearchSorted (ndarray, object, NPY_SEARCHSIDE)
+    object PyArray_SearchSorted (ndarray, object, NPY_SEARCHSIDE, PyObject*)
     object PyArray_ArgMax (ndarray, int, ndarray)
     object PyArray_ArgMin (ndarray, int, ndarray)
     object PyArray_Reshape (ndarray, object)

tests/run/numpy_test.pyx

@@ -7,6 +7,9 @@ cimport cython
 import re
 import sys
 
+# initialise NumPy C-API
+np.import_array()
+
 
 def little_endian():
     cdef int endian_detector = 1
@@ -947,4 +950,16 @@ def test_broadcast_comparison(np.ndarray[double, ndim=1] a):
     return a == 0, obj == 0, a == 1, obj == 1
 
 
-include "numpy_common.pxi"
+@testcase
+def test_c_api_searchsorted(np.ndarray arr, other):
+    """
+    >>> arr = np.random.randn(10)
+    >>> other = np.random.randn(5)
+    >>> result, expected = test_c_api_searchsorted(arr, other)
+    >>> (result == expected).all()
+    True
+    """
+    result = np.PyArray_SearchSorted(arr, other, np.NPY_SEARCHRIGHT, NULL)
+
+    expected = arr.searchsorted(other, side="right")
+    return result, expected