src/org/xwt/translators/MSPack.java

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