core/src/ru/deadsoftware/cavecraft/game/WorldSaver.java

   1 package ru.deadsoftware.cavecraft.game;
   2
   3 import com.badlogic.gdx.Gdx;
   4 import com.badlogic.gdx.files.FileHandle;
   5 import ru.deadsoftware.cavecraft.CaveGame;
   6
   7 import java.nio.ByteBuffer;
   8
   9 public class WorldSaver {
  10
  11     private static final int VERSION = 0;
  12
  13     private static int[][] fMap, bMap;
  14     private static int readIndex;
  15
  16     private static int bytesInt(byte[] bytes) {
  17         ByteBuffer wrapped = ByteBuffer.wrap(bytes);
  18         int res = wrapped.getInt(readIndex);
  19         readIndex+=4;
  20         return res;
  21     }
  22
  23     private static void writeInt(FileHandle file, int i, boolean append) {
  24         byte[] bytes = ByteBuffer.allocate(4).putInt(i).array();
  25         file.writeBytes(bytes, append);
  26     }
  27
  28     private static void saveMap(FileHandle file, int[][] map) {
  29         int width = map.length;
  30         int height = map[0].length;
  31         writeInt(file, VERSION, false);
  32         writeInt(file, width, true);
  33         writeInt(file, height, true);
  34         for (int y=0; y<map[0].length; y++) {
  35             int bl = map[0][y];
  36             int rl = 1;
  37             for (int x=0; x<map.length; x++) {
  38                 if (map[x][y]!=bl || x==map.length-1) {
  39                     writeInt(file, rl, true);
  40                     writeInt(file, bl, true);
  41                     rl=1;
  42                     bl=map[x][y];
  43                 } else {
  44                     rl++;
  45                 }
  46             }
  47         }
  48     }
  49
  50     private static int[][] loadMap(FileHandle file) {
  51         int[][] map = null;
  52         int ver, width, height;
  53         int rl,bl;
  54         byte[] data = file.readBytes();
  55         readIndex = 0;
  56         ver = bytesInt(data);
  57         if (VERSION <= ver) {
  58             width = bytesInt(data);
  59             height = bytesInt(data);
  60             map = new int[width][height];
  61             for (int y=0; y<height; y++) {
  62                 for (int x=0; x<width; x+=rl) {
  63                     rl = bytesInt(data);
  64                     bl = bytesInt(data);
  65                     for (int i=x; i<x+rl; i++) map[i][y] = bl;
  66                 }
  67             }
  68         }
  69         return map;
  70     }
  71
  72     public static int[][] getLoadedForeMap() {
  73         return fMap;
  74     }
  75
  76     public static int[][] getLoadedBackMap() {
  77         return bMap;
  78     }
  79
  80     public static void load() {
  81         fMap = loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/foremap.sav"));
  82         bMap = loadMap(Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/backmap.sav"));
  83     }
  84
  85     public static void save(int[][] foreMap, int[][] backMap) {
  86         Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/").mkdirs();
  87         saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/foremap.sav"), foreMap);
  88         saveMap(Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/backmap.sav"), backMap);
  89     }
  90
  91     public static boolean exists() {
  92         return (Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/foremap.sav").exists() &&
  93                 Gdx.files.absolute(CaveGame.GAME_FOLDER+"/saves/backmap.sav").exists());
  94     }
  95
  96 }