gistfile1.c

#ifndef H_STACK_COLLECTION
#define H_STACK_COLLECTION

#define traverse_stack(stack) sprite_node *current = first; \
                              while(*current = *current->next)

#include "graphics.h"

typedef struct {
    sprite *sprite;
    sprite_node *previous;
    sprite_node *next;
} sprite_node;

sprite_node *first;
sprite_node *last;

#endif