text: //     Copyright 2022, Kay Hayen, mailto:kay.hayen@gmail.com
  //
  //     Part of "Nuitka", an optimizing Python compiler that is compatible and
  //     integrates with CPython, but also works on its own.
  //
  //     Licensed under the Apache License, Version 2.0 (the "License");
  //     you may not use this file except in compliance with the License.
  //     You may obtain a copy of the License at
  //
  //        http://www.apache.org/licenses/LICENSE-2.0
  //
  //     Unless required by applicable law or agreed to in writing, software
  //     distributed under the License is distributed on an "AS IS" BASIS,
  //     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  //     See the License for the specific language governing permissions and
  //     limitations under the License.
  //
  /** For making "yield" and "yield from" capable of persisting current C stack.
   *
   * These copy objects pointed to into an array foreseen for this task.
   *
   **/
  
  // This file is included from another C file, help IDEs to still parse it on
  // its own.
  #ifdef __IDE_ONLY__
  #include "nuitka/prelude.h"
  #endif
  
  void Nuitka_PreserveHeap(void *dest, ...) {
      va_list(ap);
      va_start(ap, dest);
  
      char *w = (char *)dest;
  
      for (;;) {
          void *source = va_arg(ap, void *);
          if (source == NULL) {
              break;
          }
  
          size_t size = va_arg(ap, size_t);
          memcpy(w, source, size);
          w += size;
      }
  }
  
  void Nuitka_RestoreHeap(void *source, ...) {
      va_list(ap);
      va_start(ap, source);
  
      char *w = (char *)source;
  
      for (;;) {
          void *dest = va_arg(ap, void *);
          if (dest == NULL) {
              break;
          }
  
          size_t size = va_arg(ap, size_t);
          memcpy(dest, w, size);
          w += size;
      }
  }
  