pythongh-95534: Convert ZlibDecompressor.__new__ to AC (python#137923)

Author: AA-Turner

Modules/clinic/zlibmodule.c.h

@@ -1369,9 +1369,9 @@ typedef struct {
 } ZlibDecompressor;
 
 /*[clinic input]
-class zlib.ZlibDecompressor "ZlibDecompressor *" "&ZlibDecompressorType"
+class zlib._ZlibDecompressor "ZlibDecompressor *" "&ZlibDecompressorType"
 [clinic start generated code]*/
-/*[clinic end generated code: output=da39a3ee5e6b4b0d input=0658178ab94645df]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=49151d1d703e6bcc]*/
 
 static void
 ZlibDecompressor_dealloc(PyObject *op)
@@ -1670,7 +1670,7 @@ decompress(ZlibDecompressor *self, uint8_t *data,
 
 /*[clinic input]
 @permit_long_docstring_body
-zlib.ZlibDecompressor.decompress
+zlib._ZlibDecompressor.decompress
 
     data: Py_buffer
     max_length: Py_ssize_t=-1
@@ -1692,9 +1692,10 @@ the unused_data attribute.
 [clinic start generated code]*/
 
 static PyObject *
-zlib_ZlibDecompressor_decompress_impl(ZlibDecompressor *self,
-                                      Py_buffer *data, Py_ssize_t max_length)
-/*[clinic end generated code: output=990d32787b775f85 input=fcf9f974de5d02b1]*/
+zlib__ZlibDecompressor_decompress_impl(ZlibDecompressor *self,
+                                       Py_buffer *data,
+                                       Py_ssize_t max_length)
+/*[clinic end generated code: output=ac00dcf73e843e99 input=c9278e791be1152b]*/
 
 {
     PyObject *result = NULL;
@@ -1710,38 +1711,28 @@ zlib_ZlibDecompressor_decompress_impl(ZlibDecompressor *self,
     return result;
 }
 
-PyDoc_STRVAR(ZlibDecompressor__new____doc__,
-"_ZlibDecompressor(wbits=15, zdict=b\'\')\n"
-"--\n"
-"\n"
-"Create a decompressor object for decompressing data incrementally.\n"
-"\n"
-"  wbits = 15\n"
-"  zdict\n"
-"     The predefined compression dictionary. This is a sequence of bytes\n"
-"     (such as a bytes object) containing subsequences that are expected\n"
-"     to occur frequently in the data that is to be compressed. Those\n"
-"     subsequences that are expected to be most common should come at the\n"
-"     end of the dictionary. This must be the same dictionary as used by the\n"
-"     compressor that produced the input data.\n"
-"\n");
+/*[clinic input]
+@classmethod
+zlib._ZlibDecompressor.__new__
+
+    wbits: int(c_default='MAX_WBITS') = MAX_WBITS
+    zdict: object(c_default='NULL') = b''
+        The predefined compression dictionary. This is a sequence of bytes
+        (such as a bytes object) containing subsequences that are expected
+        to occur frequently in the data that is to be compressed. Those
+        subsequences that are expected to be most common should come at the
+        end of the dictionary. This must be the same dictionary as used by the
+        compressor that produced the input data.
+
+Create a decompressor object for decompressing data incrementally.
+[clinic start generated code]*/
 
 static PyObject *
-ZlibDecompressor__new__(PyTypeObject *cls,
-                        PyObject *args,
-                        PyObject *kwargs)
+zlib__ZlibDecompressor_impl(PyTypeObject *type, int wbits, PyObject *zdict)
+/*[clinic end generated code: output=1065607df0d33baa input=9ebad0be6de226e2]*/
 {
-    static char *keywords[] = {"wbits", "zdict", NULL};
-    static const char * const format = "|iO:_ZlibDecompressor";
-    int wbits = MAX_WBITS;
-    PyObject *zdict = NULL;
-    zlibstate *state = PyType_GetModuleState(cls);
-
-    if (!PyArg_ParseTupleAndKeywords(
-            args, kwargs, format, keywords, &wbits, &zdict)) {
-        return NULL;
-    }
-    ZlibDecompressor *self = PyObject_New(ZlibDecompressor, cls);
+    zlibstate *state = PyType_GetModuleState(type);
+    ZlibDecompressor *self = PyObject_New(ZlibDecompressor, type);
     if (self == NULL) {
         return NULL;
     }
@@ -1817,7 +1808,7 @@ static PyMethodDef Decomp_methods[] =
 };
 
 static PyMethodDef ZlibDecompressor_methods[] = {
-    ZLIB_ZLIBDECOMPRESSOR_DECOMPRESS_METHODDEF
+    ZLIB__ZLIBDECOMPRESSOR_DECOMPRESS_METHODDEF
     {NULL}
 };
 
@@ -2052,8 +2043,8 @@ static PyType_Spec Decomptype_spec = {
 static PyType_Slot ZlibDecompressor_type_slots[] = {
     {Py_tp_dealloc, ZlibDecompressor_dealloc},
     {Py_tp_members, ZlibDecompressor_members},
-    {Py_tp_new, ZlibDecompressor__new__},
-    {Py_tp_doc, (char *)ZlibDecompressor__new____doc__},
+    {Py_tp_new, zlib__ZlibDecompressor},
+    {Py_tp_doc, (char *)zlib__ZlibDecompressor__doc__},
     {Py_tp_methods, ZlibDecompressor_methods},
     {0, 0},
 };