list.h

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#ifndef __LIST_H__
#define __LIST_H__
 
#define a_List_resize(list,num_items,alloc_step) \
   if (!list) { \
      list = dMalloc(alloc_step * sizeof(*list)); \
   } \
   if (num_items >= alloc_step){ \
      while ( num_items >= alloc_step ) \
         alloc_step <<= 1; \
      list = dRealloc(list, alloc_step * sizeof(*list)); \
   }
 
 
#define a_List_add(list,num_items,alloc_step) \
   a_List_resize(list,num_items,alloc_step)
 
 
#define a_List_remove(list, item, num_items) \
   if (list && item < num_items) { \
      list[item] = list[--num_items]; \
   }
 
 
#endif /* __LIST_H__ */