package org.ibex.nestedvm.util;
import java.io.*;
+import java.nio.channels.*;
import java.net.*;
import java.util.*;
abstract boolean _atomicCreateFile(File f) throws IOException;
public static boolean atomicCreateFile(File f) throws IOException { return p._atomicCreateFile(f); }
+
+ abstract Seekable.Lock _lockFile(Seekable s, RandomAccessFile raf, long pos, long size, boolean shared) throws IOException;
+ public static Seekable.Lock lockFile(Seekable s, RandomAccessFile raf, long pos, long size, boolean shared) throws IOException {
+ return p._lockFile(s, raf, pos, size, shared); }
abstract void _socketHalfClose(Socket s, boolean output) throws IOException;
public static void socketHalfClose(Socket s, boolean output) throws IOException { p._socketHalfClose(s,output); }
abstract String _timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l);
public static String timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l) { return p._timeZoneGetDisplayName(tz,dst,showlong,l); }
public static String timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong) { return timeZoneGetDisplayName(tz,dst,showlong,Locale.getDefault()); }
-
- abstract RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException;
- public static RandomAccessFile truncatedRandomAccessFile(File f, String mode) throws IOException { return p._truncatedRandomAccessFile(f,mode); }
+
+ abstract void _setFileLength(RandomAccessFile f, int length)
+ throws IOException;
+ public static void setFileLength(RandomAccessFile f, int length)
+ throws IOException { p._setFileLength(f, length); }
abstract File[] _listRoots();
public static File[] listRoots() { return p._listRoots(); }
new FileOutputStream(f).close();
return true;
}
+ Seekable.Lock _lockFile(Seekable s, RandomAccessFile raf, long p, long size, boolean shared) throws IOException {
+ throw new IOException("file locking requires jdk 1.4+");
+ }
void _socketHalfClose(Socket s, boolean output) throws IOException {
throw new IOException("half closing sockets not supported");
}
if(off > 0) sb.append(":").append(off);
return sb.toString();
}
-
+
+ void _setFileLength(RandomAccessFile f, int length) throws IOException{
+ InputStream in = new FileInputStream(f.getFD());
+ OutputStream out = new FileOutputStream(f.getFD());
+
+ byte[] buf = new byte[1024];
+ for (int len; length > 0; length -= len) {
+ len = in.read(buf, 0, Math.min(length, buf.length));
+ if (len == -1) break;
+ out.write(buf, 0, len);
+ }
+ if (length == 0) return;
+
+ // fill the rest of the space with zeros
+ for (int i=0; i < buf.length; i++) buf[i] = 0;
+ while (length > 0) {
+ out.write(buf, 0, Math.min(length, buf.length));
+ length -= buf.length;
+ }
+ }
+
RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException {
new FileOutputStream(f).close();
return new RandomAccessFile(f,mode);
String _timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l) {
return tz.getDisplayName(dst,showlong ? TimeZone.LONG : TimeZone.SHORT, l);
}
-
- RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException {
- RandomAccessFile raf = new RandomAccessFile(f,mode);
- raf.setLength(0);
- return raf;
+
+ void _setFileLength(RandomAccessFile f, int length) throws IOException {
+ f.setLength(length);
}
-
+
File[] _listRoots() { return File.listRoots(); }
}
static class Jdk14 extends Jdk13 {
InetAddress _inetAddressFromBytes(byte[] a) throws UnknownHostException { return InetAddress.getByAddress(a); }
+
+ Seekable.Lock _lockFile(Seekable s, RandomAccessFile r, long pos, long size, boolean shared) throws IOException {
+ FileLock flock;
+ try {
+ flock = pos == 0 && size == 0 ? r.getChannel().lock() :
+ r.getChannel().tryLock(pos, size, shared);
+ } catch (OverlappingFileLockException e) { flock = null; }
+ if (flock == null) return null; // region already locked
+ return new Jdk14FileLock(s, flock);
+ }
+ }
+
+ private static final class Jdk14FileLock extends Seekable.Lock {
+ private final Seekable s;
+ private final FileLock l;
+
+ Jdk14FileLock(Seekable sk, FileLock flock) { s = sk; l = flock; }
+ public Seekable seekable() { return s; }
+ public boolean isShared() { return l.isShared(); }
+ public boolean isValid() { return l.isValid(); }
+ public void release() throws IOException { l.release(); }
+ public long position() { return l.position(); }
+ public long size() { return l.size(); }
+ public String toString() { return l.toString(); }
}
}