//画面領域単位のデータ構造
struct OneMap{
	unsigned char *buf;	//マップチップデータ
	unsigned char *hit;	//当たり判定チップデータ
	int id;				//1から数える通し番号
	unsigned long pos;	//マップのx座標(下位word)とy座標(上位word)
	OneMap* left;		//左隣の画面領域のポインタ
	OneMap* right;		//右隣の画面領域のポインタ
	OneMap* up;			//上隣の画面領域のポインタ
	OneMap* down;		//下隣の画面領域のポインタ
	OneMap* next;		//リスト構造の次の要素へのポインタ
};


//画面領域の追加
OneMap* Map::new_OneMap(int mapsz_w, int mapsz_h, unsigned long pos){
	OneMap* a = new OneMap;
	OneMap* b;

	a->buf = new unsigned char[mapsz_w * mapsz_h];
	memset(a->buf, 0, mapsz_w * mapsz_h);
	a->hit = new unsigned char[mapsz_w * mapsz_h];
	memset(a->hit, 0, mapsz_w * mapsz_h);
	a->pos = pos;
	a->left = NULL;
	a->right = NULL;
	a->up = NULL;
	a->down = NULL;
	a->next = NULL;
	
	unsigned long pos_r = (pos & 0xFFFF0000) | ((pos + 1) & 0xFFFF);
	unsigned long pos_l = (pos & 0xFFFF0000) | ((pos - 1) & 0xFFFF);
	unsigned long pos_u = pos - 0x10000;
	unsigned long pos_d = pos + 0x10000;
	
//既存のマップとの関連付け
	if(m_fstOneMap){
		b = m_fstOneMap;
		
		while(1){
			
			if(b->pos == pos_r){
				b->left = a;
				a->right = b;
			}else if(b->pos == pos_l){
				b->right = a;
				a->left = b;
			}else if(b->pos == pos_d){
				b->up = a;
				a->down = b;
			}else if(b->pos == pos_u){
				b->down = a;
				a->up = b;
			}

			if(b->next == NULL){ break;}
			b = b->next;
		}
		a->id = b->id + 1;
		b->next = a;
	}else{
		m_fstOneMap = a;
		a->pos = 0;
		a->id = 1;
	}
	return a;
}

//マップファイルの読み込み
void Map::Load(const TCHAR* filename){

	OneMap* om;
	int ires;
	int id;
	unsigned long pos;
	char header[17];
	FILE *fp = _tfopen(filename, _T("rb"));
	if(fp==NULL){ return;}

	if(m_fstOneMap){
		clear_OneMap();
	}

//version
	fread(header, 16, 1, fp);
	header[16]='\0';
	if(strcmp(header, "ROCKMAP_20081102") != 0){ return;}

//mapsz
	fread(&m_mapsz_w, 4, 1, fp);
	fread(&m_mapsz_h, 4, 1, fp);
		

	while(fread(&id, 4, 1, fp) == 1){		//id;
		fread(&pos, 4, 1, fp);

		om = new_OneMap(m_mapsz_w, m_mapsz_h, pos);
		if(om->id != id){
			fclose(fp);
			TRACE(_T("error: id_difference, %d, %d\n"),om->id,id);
			return;
		}

		fread(&ires, 4, 1, fp);		//id of left OneMap
		fread(&ires, 4, 1, fp);		//id of right OneMap
		fread(&ires, 4, 1, fp);		//id of up OneMap
		fread(&ires, 4, 1, fp);		//id of down OneMap
		//順番どおりならnew_OneMapを使えばposによる関連付けで一致するはず
		
		fread(om->buf, m_mapsz_w * m_mapsz_h, 1, fp);
		fread(om->hit, m_mapsz_w * m_mapsz_h, 1, fp);

	}
	fclose(fp);

}