/***** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2009 JRuby project
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.ext.ffi;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.jruby.Ruby;
import org.jruby.RubyIO;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.io.OpenFile;
/**
* FFI specific I/O routines
*/
public class IOModule {
public static void createIOModule(Ruby runtime, RubyModule ffi) {
RubyModule module = ffi.defineModuleUnder("IO");
module.defineAnnotatedMethods(IOModule.class);
}
@JRubyMethod(name = "native_read", module = true)
public static final IRubyObject native_read(ThreadContext context, IRubyObject self,
IRubyObject src, IRubyObject dst, IRubyObject rbLength) {
if (!(src instanceof RubyIO)) {
throw context.runtime.newTypeError("wrong argument (expected IO)");
}
if (!(dst instanceof AbstractMemory)) {
throw context.runtime.newTypeError("wrong argument (expected FFI memory)");
}
Ruby runtime = context.runtime;
try {
OpenFile openFile = ((RubyIO) src).getOpenFile();
openFile.checkClosed();
openFile.checkReadable(context);
ByteBuffer buffer = ((AbstractMemory) dst).getMemoryIO().asByteBuffer();
int count = RubyNumeric.num2int(rbLength);
if (count > buffer.remaining()) {
throw runtime.newIndexError("read count too big for output buffer");
}
if (count < buffer.remaining()) {
buffer = buffer.duplicate();
buffer.limit(count);
}
// TODO: This used to use ChannelStream and honor its buffers; it does not honor OpenFile buffers now
return runtime.newFixnum(openFile.readChannel().read(buffer));
} catch (EOFException e) {
return runtime.newFixnum(-1);
} catch (IOException e) {
throw runtime.newIOErrorFromException(e);
}
}
}