Function allocate_dynamic

mysys/array.c:231–263

*/

my_bool allocate_dynamic(DYNAMIC_ARRAY *array, ulong max_elements)
{
  if (max_elements >= array->max_element)
  {
    ulong size;
    uchar *new_ptr;
    size= (max_elements + array->alloc_increment)/array->alloc_increment;
    size*= array->alloc_increment;
    if (array->buffer == (uchar *)(array + 1))
    {
       /*
         In this senerio, the buffer is statically preallocated,
         so we have to create an all-new malloc since we overflowed
       */
       if (!(new_ptr= (uchar *) my_malloc(size *
                                         array->size_of_element,
                                         MYF(MY_WME))))
         return 0;
       memcpy(new_ptr, array->buffer, 
              array->elements * array->size_of_element);
     }
     else


    if (!(new_ptr= (uchar*) my_realloc(array->buffer,size*
                                       array->size_of_element,
                                       MYF(MY_WME | MY_ALLOW_ZERO_PTR))))
      return TRUE;
    array->buffer= new_ptr;
    array->max_element= size;
  }
  return FALSE;
}


/*