org.jruby.ext.ffi.IOModule Maven / Gradle / Ivy
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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.BadDescriptorException;
import org.jruby.util.io.ChannelStream;
import org.jruby.util.io.InvalidValueException;
import org.jruby.util.io.OpenFile;
import org.jruby.util.io.PipeException;
/**
* 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.getRuntime().newTypeError("wrong argument (expected IO)");
}
if (!(dst instanceof AbstractMemory)) {
throw context.getRuntime().newTypeError("wrong argument (expected FFI memory)");
}
Ruby runtime = context.getRuntime();
try {
OpenFile openFile = ((RubyIO) src).getOpenFile();
openFile.checkClosed(runtime);
openFile.checkReadable(runtime);
ChannelStream stream = (ChannelStream) openFile.getMainStreamSafe();
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);
}
return runtime.newFixnum(stream.read(buffer));
} catch (InvalidValueException ex) {
throw runtime.newErrnoEINVALError();
} catch (EOFException e) {
return runtime.newFixnum(-1);
} catch (BadDescriptorException e) {
throw runtime.newErrnoEBADFError();
} catch (IOException e) {
throw runtime.newIOErrorFromException(e);
}
}
}