src/org/ibex/graphics/MSPack.java

   1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
   2 // Licensed under the GNU General Public License version 2 ("the License").
   3 // You may not use this file except in compliance with the License.
   4
   5 package org.ibex.graphics;
   6
   7 import org.ibex.util.*;
   8 import java.io.*;
   9 import org.ibex.nestedvm.*;
  10 import org.ibex.nestedvm.Runtime;
  11
  12 public class MSPack {
  13     private static byte[] image;
  14
  15     private String[] fileNames;
  16     private int[] lengths;
  17     private byte[][] data;
  18
  19     public static class MSPackException extends IOException { public MSPackException(String s) { super(s); } }
  20
  21     public MSPack(InputStream cabIS) throws IOException {
  22         try {
  23             Runtime vm = (Runtime)Class.forName("org.ibex.util.MIPSApps").newInstance();
  24             byte[] cab = InputStreamToByteArray.convert(cabIS);
  25             int cabAddr = vm.sbrk(cab.length);
  26             if(cabAddr < 0) throw new MSPackException("sbrk failed");
  27
  28             vm.copyout(cab,cabAddr,cab.length);
  29
  30             vm.setUserInfo(0,cabAddr);
  31             vm.setUserInfo(1,cab.length);
  32
  33             int status = vm.run(new String[]{ "mspack"} );
  34             if(status != 0) throw new MSPackException("mspack.mips failed (" + status + ")");
  35
  36             /*static struct {
  37                 char *filename;
  38                 char *data;
  39                 int length;
  40             } output_table[MAX_MEMBERS+1]; */
  41
  42             int filesTable = vm.getUserInfo(2);
  43             int count=0;
  44             while(vm.memRead(filesTable+count*12) != 0) count++;
  45
  46             fileNames = new String[count];
  47             data = new byte[count][];
  48             lengths = new int[count];
  49
  50             for(int i=0,addr=filesTable;i<count;i++,addr+=12) {
  51                 int length = vm.memRead(addr+8);
  52                 data[i] = new byte[length];
  53                 lengths[i] = length;
  54                 fileNames[i] = vm.cstring(vm.memRead(addr));
  55                 System.out.println("" + fileNames[i]);
  56                 vm.copyin(vm.memRead(addr+4),data[i],length);
  57             }
  58         } catch(Runtime.ExecutionException e) {
  59             e.printStackTrace();
  60             throw new MSPackException("mspack.mips crashed");
  61         } catch(Exception e) {
  62             throw new MSPackException(e.toString());
  63         }
  64     }
  65
  66     public String[] getFileNames() { return fileNames; }
  67     public int[] getLengths() { return lengths; }
  68     public InputStream getInputStream(int index) {
  69         return new KnownLength.KnownLengthInputStream(new ByteArrayInputStream(data[index]), data[index].length);
  70     }
  71     public InputStream getInputStream(String fileName) {
  72         for(int i=0;i<fileNames.length;i++) {
  73             if(fileName.equalsIgnoreCase(fileNames[i])) return getInputStream(i);
  74         }
  75         return null;
  76     }
  77
  78     public static void main(String[] args) throws IOException {
  79         MSPack pack = new MSPack(new FileInputStream(args[0]));
  80         String[] files = pack.getFileNames();
  81         for(int i=0;i<files.length;i++)
  82             System.out.println(i + ": " + files[i] + ": " + pack.getLengths()[i]);
  83         System.out.println("Writing " + files[files.length-1]);
  84         InputStream is = pack.getInputStream(files.length-1);
  85         OutputStream os = new FileOutputStream(files[files.length-1]);
  86         int n;
  87         byte[] buf = new byte[4096];
  88         while((n = is.read(buf)) != -1) os.write(buf,0,n);
  89         os.close();
  90         is.close();
  91     }
  92 }
  93