src/org/ibex/graphics/MSPack.java

   1 package org.ibex.util;
   2
   3 import org.ibex.core.Main;
   4 import org.ibex.util.*;
   5 import java.io.*;
   6 import org.ibex.nestedvm.*;
   7 import org.ibex.nestedvm.Runtime;
   8
   9 public class MSPack {
  10     private static byte[] image;
  11
  12     private String[] fileNames;
  13     private int[] lengths;
  14     private byte[][] data;
  15
  16     public static class MSPackException extends IOException { public MSPackException(String s) { super(s); } }
  17
  18     public MSPack(InputStream cabIS) throws IOException {
  19         try {
  20             Runtime vm = (Runtime)Class.forName("org.ibex.util.MIPSApps").newInstance();
  21             byte[] cab = InputStreamToByteArray.convert(cabIS);
  22             int cabAddr = vm.sbrk(cab.length);
  23             if(cabAddr < 0) throw new MSPackException("sbrk failed");
  24
  25             vm.copyout(cab,cabAddr,cab.length);
  26
  27             vm.setUserInfo(0,cabAddr);
  28             vm.setUserInfo(1,cab.length);
  29
  30             int status = vm.run(new String[]{ "mspack"} );
  31             if(status != 0) throw new MSPackException("mspack.mips failed (" + status + ")");
  32
  33             /*static struct {
  34                 char *filename;
  35                 char *data;
  36                 int length;
  37             } output_table[MAX_MEMBERS+1]; */
  38
  39             int filesTable = vm.getUserInfo(2);
  40             int count=0;
  41             while(vm.memRead(filesTable+count*12) != 0) count++;
  42
  43             fileNames = new String[count];
  44             data = new byte[count][];
  45             lengths = new int[count];
  46
  47             for(int i=0,addr=filesTable;i<count;i++,addr+=12) {
  48                 int length = vm.memRead(addr+8);
  49                 data[i] = new byte[length];
  50                 lengths[i] = length;
  51                 fileNames[i] = vm.cstring(vm.memRead(addr));
  52                 System.out.println("" + fileNames[i]);
  53                 vm.copyin(vm.memRead(addr+4),data[i],length);
  54             }
  55         } catch(Runtime.ExecutionException e) {
  56             e.printStackTrace();
  57             throw new MSPackException("mspack.mips crashed");
  58         } catch(Exception e) {
  59             throw new MSPackException(e.toString());
  60         }
  61     }
  62
  63     public String[] getFileNames() { return fileNames; }
  64     public int[] getLengths() { return lengths; }
  65     public InputStream getInputStream(int index) {
  66         return new KnownLength.KnownLengthInputStream(new ByteArrayInputStream(data[index]), data[index].length);
  67     }
  68     public InputStream getInputStream(String fileName) {
  69         for(int i=0;i<fileNames.length;i++) {
  70             if(fileName.equalsIgnoreCase(fileNames[i])) return getInputStream(i);
  71         }
  72         return null;
  73     }
  74
  75     public static void main(String[] args) throws IOException {
  76         MSPack pack = new MSPack(new FileInputStream(args[0]));
  77         String[] files = pack.getFileNames();
  78         for(int i=0;i<files.length;i++)
  79             System.out.println(i + ": " + files[i] + ": " + pack.getLengths()[i]);
  80         System.out.println("Writing " + files[files.length-1]);
  81         InputStream is = pack.getInputStream(files.length-1);
  82         OutputStream os = new FileOutputStream(files[files.length-1]);
  83         int n;
  84         byte[] buf = new byte[4096];
  85         while((n = is.read(buf)) != -1) os.write(buf,0,n);
  86         os.close();
  87         is.close();
  88     }
  89 }
  90