cpython/Modules/_ctypes/stgdict.c

#ifndef Py_BUILD_CORE_BUILTIN
#define Py_BUILD_CORE_MODULE …
#endif

#include "Python.h"
// windows.h must be included before pycore internal headers
#ifdef MS_WIN32
#  include <windows.h>
#endif

#include "pycore_call.h"          // _PyObject_CallNoArgs()
#include "pycore_dict.h"          // _PyDict_SizeOf()
#include <ffi.h>
#ifdef MS_WIN32
#  include <malloc.h>
#endif
#include "ctypes.h"

/* This file relates to StgInfo -- type-specific information for ctypes.
 * See ctypes.h for details.
 */

int
PyCStgInfo_clone(StgInfo *dst_info, StgInfo *src_info)
{ … }

/* descr is the descriptor for a field marked as anonymous.  Get all the
 _fields_ descriptors from descr->proto, create new descriptors with offset
 and index adjusted, and stuff them into type.
 */
static int
MakeFields(PyObject *type, CFieldObject *descr,
           Py_ssize_t index, Py_ssize_t offset)
{ … }

/* Iterate over the names in the type's _anonymous_ attribute, if present,
 */
static int
MakeAnonFields(PyObject *type)
{ … }

/*
  Retrieve the (optional) _pack_ attribute from a type, the _fields_ attribute,
  and initialize StgInfo.  Used for Structure and Union subclasses.
*/
int
PyCStructUnionType_update_stginfo(PyObject *type, PyObject *fields, int isStruct)
{ … }