Java Code Examples for com.sun.jna.Pointer#NULL

/**
 * Releases the native memory held by this event handle.
 *
 * @param clientLibrary The client library instance
 */
public synchronized void releaseMemory(FbClientLibrary clientLibrary) {
    if (size == -1) return;
    try {
        if (eventBuffer.getValue() != Pointer.NULL) {
            clientLibrary.isc_free(eventBuffer.getValue());
            eventBuffer.setValue(Pointer.NULL);
        }
        if (resultBuffer.getValue() != Pointer.NULL) {
            clientLibrary.isc_free(resultBuffer.getValue());
            resultBuffer.setValue(Pointer.NULL);
        }
    } finally {
        size = -1;
    }
}
 

/**
 * Protect the specified byte range
 *
 * @param data the data to protect
 * @return the the protected form the data
 */
public static byte[] protect(byte[] data) throws MasterPasswordUnavailableException {
  if(data.length == 0) {
    return data;
  }
  Memory input = new Memory(data.length);
  input.write(0, data, 0, data.length);
  Crypt32.DATA_BLOB in = new Crypt32.DATA_BLOB();
  in.cbData = new W32API.DWORD(data.length);
  in.pbData = input;
  Crypt32.DATA_BLOB out = new Crypt32.DATA_BLOB();
  out.pbData = Pointer.NULL;
  Crypt32 crypt = Crypt32.INSTANCE;
  Kernel32 kernel = Kernel32.INSTANCE;
  boolean rc = crypt.CryptProtectData(in, "Master Key", Pointer.NULL, Pointer.NULL, Pointer.NULL, new W32API.DWORD(0), out);
  if (!rc) {
    W32API.DWORD drc = kernel.GetLastError();
    throw new MasterPasswordUnavailableException("CryptProtectData failed: " + drc.intValue());
  }
  else {
    byte[] output = new byte[out.cbData.intValue()];
    out.pbData.read(0, output, 0, output.length);
    kernel.LocalFree(out.pbData);
    return output;
  }
}
 

/**
 * Unprotect the specified byte range
 *
 * @param data the data to protect
 * @return the the protected form the data
 */
public static byte[] unprotect(byte[] data) throws MasterPasswordUnavailableException {
  if(data.length == 0) {
    return data;
  }
  Memory input = new Memory(data.length);
  input.write(0, data, 0, data.length);
  Crypt32.DATA_BLOB in = new Crypt32.DATA_BLOB();
  in.cbData = new W32API.DWORD(data.length);
  in.pbData = input;
  Crypt32.DATA_BLOB out = new Crypt32.DATA_BLOB();
  out.pbData = Pointer.NULL;
  Crypt32 crypt = Crypt32.INSTANCE;
  Kernel32 kernel = Kernel32.INSTANCE;
  boolean rc = crypt.CryptUnprotectData(in, Pointer.NULL, Pointer.NULL, Pointer.NULL, Pointer.NULL, new W32API.DWORD(0), out);
  if (!rc) {
    W32API.DWORD drc = kernel.GetLastError();
    throw new MasterPasswordUnavailableException("CryptProtectData failed: " + drc.intValue());
  }
  else {
    byte[] output = new byte[out.cbData.intValue()];
    out.pbData.read(0, output, 0, output.length);
    kernel.LocalFree(out.pbData);
    return output;
  }
}
 

private Pointer[] createFSEventStream() throws IOException {
    final Pointer root = cf.CFStringCreateWithCString(Pointer.NULL,"/",ENC_MAC_ROMAN);  //NOI18N
    if (root == Pointer.NULL) {
        throw new IOException("Path creation failed.");     //NOI18N
    }
    final Pointer arr = cf.CFArrayCreateMutable(Pointer.NULL, new NativeLong(1), Pointer.NULL);
    if (arr == Pointer.NULL) {
        throw new IOException("Path list creation failed.");    //NOI18N
    }
    cf.CFArrayAppendValue(arr, root);

    final Pointer eventStream = cs.FSEventStreamCreate(Pointer.NULL, callback, Pointer.NULL, arr, kFSEventStreamEventIdSinceNow, LATENCY, kFSEventStreamCreateFlagNoDefer);
    if (eventStream == Pointer.NULL) {
        throw new IOException("Creation of FSEventStream failed."); //NOI18N
    }
    final Pointer loop = cf.CFRunLoopGetCurrent();
    if (eventStream == Pointer.NULL) {
        throw new IOException("Cannot find run loop for caller.");  //NOI18N
    }
    final Pointer kCFRunLoopDefaultMode = findDefaultMode(loop);
    if (kCFRunLoopDefaultMode == null) {
        throw new IOException("Caller has no defaul run loop mode.");   //NOI18N
    }
    cs.FSEventStreamScheduleWithRunLoop(eventStream, loop, kCFRunLoopDefaultMode);
    if (LOG.isLoggable(DEBUG_LOG_LEVEL)) {
        LOG.log(DEBUG_LOG_LEVEL, getStreamDescription(eventStream));
    }
    cs.FSEventStreamStart(eventStream);
    return new Pointer[] {eventStream, loop};
}
 

private Pointer findDefaultMode(final Pointer runLoop) {
    final Pointer modes = cf.CFRunLoopCopyAllModes(runLoop);
    if (modes != Pointer.NULL) {
        final int modesCount = cf.CFArrayGetCount(modes).intValue();
        for (int i=0; i< modesCount; i++) {
            final Pointer mode = cf.CFArrayGetValueAtIndex(modes, new NativeLong(i));
            if (mode != Pointer.NULL && DEFAULT_RUN_LOOP_MODE.equals(cf.CFStringGetCStringPtr(mode, ENC_MAC_ROMAN))) {
                return mode;
            }
        }
    }
    return null;
}
 

static void setOverlayIcon(IdeFrame frame, Object icon, boolean dispose) {
  if (!isEnabled()) {
    return;
  }

  if (icon == null) {
    icon = Pointer.NULL;
  }
  mySetOverlayIcon.invokeInt(new Object[]{myInterfacePointer, getHandle(frame), icon, Pointer.NULL});
  if (dispose) {
    User32.INSTANCE.DestroyIcon((WinDef.HICON)icon);
  }
}
 

public static byte[] contents(Vlen_t v) {
  if (v.p == Pointer.NULL)
    return null;
  return v.p.getByteArray(0, v.len);
}
 

private String getStreamDescription(final Pointer eventStream) {
    final Pointer desc = cs.FSEventStreamCopyDescription(eventStream);
    return desc == Pointer.NULL ? "" : cf.CFStringGetCStringPtr(desc, ENC_MAC_ROMAN);   //NOI18N
}