package net.minecraft.src;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import net.minecraft.src.CodecMus;

class MusInputStream extends InputStream {

   private int hash;
   private InputStream inputStream;
   byte[] buffer;
   // $FF: synthetic field
   final CodecMus codec;


   public MusInputStream(CodecMus var1, URL var2, InputStream var3) {
      this.codec = var1;
      this.buffer = new byte[1];
      this.inputStream = var3;
      String var4 = var2.getPath();
      var4 = var4.substring(var4.lastIndexOf("/") + 1);
      this.hash = var4.hashCode();
   }

   public int read() {
      int var1 = this.read(this.buffer, 0, 1);
      return var1 < 0?var1:this.buffer[0];
   }

   public int read(byte[] var1, int var2, int var3) {
      try {
         var3 = this.inputStream.read(var1, var2, var3);
      } catch (IOException e) {
         return 0;
      }

      for(int var4 = 0; var4 < var3; ++var4) {
         byte var5 = var1[var2 + var4] = (byte)(var1[var2 + var4] ^ this.hash >> 8);
         this.hash = this.hash * 498729871 + 85731 * var5;
      }

      return var3;
   }
}