bool LoadNextSprite(int load_index, byte file_slot, uint file_sprite_id)

{

	SpriteCache *sc;

	uint32 file_pos = FioGetPos();

	if (!ReadSpriteHeaderSkipData()) return false;

	if (load_index >= MAX_SPRITES) {

		error("Tried to load too many sprites (#%d; max %d)", load_index, MAX_SPRITES);

	}

	sc = AllocateSpriteCache(load_index);

	sc->file_slot = file_slot;

	sc->file_pos = file_pos;

	sc->ptr = NULL;

	sc->lru = 0;

	sc->id = file_sprite_id;

	return true;

}

void DupSprite(SpriteID old_spr, SpriteID new_spr)

{

	SpriteCache *scold = GetSpriteCache(old_spr);

	scnew->file_slot = scold->file_slot;

	scnew->file_pos = scold->file_pos;

	scnew->ptr = NULL;

	scnew->id = scold->id;

}

#define S_FREE_MASK 1

static inline MemBlock* NextBlock(MemBlock* block)

{

	return (MemBlock*)((byte*)block + (block->size & ~S_FREE_MASK));

}

static uint32 GetSpriteCacheUsage()

{

	uint32 tot_size = 0;

	MemBlock* s;

	for (s = _spritecache_ptr; s->size != 0; s = NextBlock(s))

		if (!(s->size & S_FREE_MASK)) tot_size += s->size;

	return tot_size;