File: ensure_array_size.h

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#ifndef ENSURE_ARRAY_SIZE_H
#define ENSURE_ARRAY_SIZE_H

void realloc_array(void **array, size_t elem_size, size_t *curr_array_size, size_t requested_size);

#define ENSURE_ARRAY_SIZE(arrayp, curr_array_size, req_size)                      \
  do {                                                                            \
    if ((req_size) > (curr_array_size))                                           \
    {                                                                             \
      size_t casize = (curr_array_size);                                          \
                                                                                  \
      realloc_array((void **) &(arrayp), sizeof(*(arrayp)), &casize, (req_size)); \
      (curr_array_size) = casize;                                                 \
    }                                                                             \
  } while (0)

#endif