Removed compat_helper.h (#29693)

Author: WillAyd

pandas/_libs/internals.pyx

@@ -1,21 +1,14 @@
 import cython
 from cython import Py_ssize_t
 
-from cpython.object cimport PyObject
+from cpython.slice cimport PySlice_GetIndicesEx
 
 cdef extern from "Python.h":
     Py_ssize_t PY_SSIZE_T_MAX
 
 import numpy as np
 from numpy cimport int64_t
 
-cdef extern from "compat_helper.h":
-    cdef int slice_get_indices(PyObject* s, Py_ssize_t length,
-                               Py_ssize_t *start, Py_ssize_t *stop,
-                               Py_ssize_t *step,
-                               Py_ssize_t *slicelength) except -1
-
-
 from pandas._libs.algos import ensure_int64
 
 
@@ -258,8 +251,8 @@ cpdef Py_ssize_t slice_len(
     if slc is None:
         raise TypeError("slc must be slice")
 
-    slice_get_indices(<PyObject *>slc, objlen,
-                      &start, &stop, &step, &length)
+    PySlice_GetIndicesEx(slc, objlen,
+                         &start, &stop, &step, &length)
 
     return length
 
@@ -278,8 +271,8 @@ cdef slice_get_indices_ex(slice slc, Py_ssize_t objlen=PY_SSIZE_T_MAX):
     if slc is None:
         raise TypeError("slc should be a slice")
 
-    slice_get_indices(<PyObject *>slc, objlen,
-                      &start, &stop, &step, &length)
+    PySlice_GetIndicesEx(slc, objlen,
+                         &start, &stop, &step, &length)
 
     return start, stop, step, length
 

pandas/_libs/src/compat_helper.h

@@ -83,10 +83,7 @@ def is_platform_mac():
 
 
 _pxi_dep_template = {
-    "algos": [
-        "_libs/algos_common_helper.pxi.in",
-        "_libs/algos_take_helper.pxi.in",
-    ],
+    "algos": ["_libs/algos_common_helper.pxi.in", "_libs/algos_take_helper.pxi.in"],
     "hashtable": [
         "_libs/hashtable_class_helper.pxi.in",
         "_libs/hashtable_func_helper.pxi.in",
@@ -544,7 +541,7 @@ def srcpath(name=None, suffix=".pyx", subdir="src"):
 ts_include = ["pandas/_libs/tslibs/src", "pandas/_libs/tslibs"]
 
 
-lib_depends = ["pandas/_libs/src/parse_helper.h", "pandas/_libs/src/compat_helper.h"]
+lib_depends = ["pandas/_libs/src/parse_helper.h"]
 
 np_datetime_headers = [
     "pandas/_libs/tslibs/src/datetime/np_datetime.h",
@@ -823,5 +820,5 @@ def srcpath(name=None, suffix=".pyx", subdir="src"):
     entry_points={
         "pandas_plotting_backends": ["matplotlib = pandas:plotting._matplotlib"]
     },
-    **setuptools_kwargs
+    **setuptools_kwargs,
 )