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A library for invoking native functions from java
/*
* Copyright (C) 2008-2010 Wayne Meissner
*
* This file is part of the JNR project.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jnr.ffi.provider.jffi;
import jnr.ffi.Pointer;
import jnr.ffi.Runtime;
import jnr.ffi.provider.AbstractMemoryIO;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
class DirectMemoryIO extends AbstractMemoryIO {
static final com.kenai.jffi.MemoryIO IO = com.kenai.jffi.MemoryIO.getInstance();
DirectMemoryIO(Runtime runtime, long address) {
super(runtime, address, true);
}
DirectMemoryIO(Runtime runtime, int address) {
super(runtime, (long) address & 0xffffffffL, true);
}
public long size() {
return Long.MAX_VALUE;
}
@Override
public boolean hasArray() {
return false;
}
@Override
public Object array() {
throw new UnsupportedOperationException("no array");
}
@Override
public int arrayOffset() {
throw new UnsupportedOperationException("no array");
}
@Override
public int arrayLength() {
throw new UnsupportedOperationException("no array");
}
@Override
public int hashCode() {
return (int) ((address() << 32L) ^ address());
}
@Override
public boolean equals(Object obj) {
return obj instanceof Pointer && ((Pointer) obj).address() == address() && ((Pointer) obj).getRuntime().isCompatible(getRuntime());
}
public final byte getByte(long offset) {
return IO.getByte(address() + offset);
}
public final short getShort(long offset) {
return IO.getShort(address() + offset);
}
public final int getInt(long offset) {
return IO.getInt(address() + offset);
}
public final long getLongLong(long offset) {
return IO.getLong(address() + offset);
}
public final float getFloat(long offset) {
return IO.getFloat(address() + offset);
}
public final double getDouble(long offset) {
return IO.getDouble(address() + offset);
}
public final void putByte(long offset, byte value) {
IO.putByte(address() + offset, value);
}
public final void putShort(long offset, short value) {
IO.putShort(address() + offset, value);
}
public final void putInt(long offset, int value) {
IO.putInt(address() + offset, value);
}
public final void putLongLong(long offset, long value) {
IO.putLong(address() + offset, value);
}
public final void putFloat(long offset, float value) {
IO.putFloat(address() + offset, value);
}
public final void putDouble(long offset, double value) {
IO.putDouble(address() + offset, value);
}
public final void get(long offset, byte[] dst, int off, int len) {
IO.getByteArray(address() + offset, dst, off, len);
}
public final void put(long offset, byte[] src, int off, int len) {
IO.putByteArray(address() + offset, src, off, len);
}
public final void get(long offset, short[] dst, int off, int len) {
IO.getShortArray(address() + offset, dst, off, len);
}
public final void put(long offset, short[] src, int off, int len) {
IO.putShortArray(address() + offset, src, off, len);
}
public final void get(long offset, int[] dst, int off, int len) {
IO.getIntArray(address() + offset, dst, off, len);
}
public final void put(long offset, int[] src, int off, int len) {
IO.putIntArray(address() + offset, src, off, len);
}
public final void get(long offset, long[] dst, int off, int len) {
IO.getLongArray(address() + offset, dst, off, len);
}
public final void put(long offset, long[] src, int off, int len) {
IO.putLongArray(address() + offset, src, off, len);
}
public final void get(long offset, float[] dst, int off, int len) {
IO.getFloatArray(address() + offset, dst, off, len);
}
public final void put(long offset, float[] src, int off, int len) {
IO.putFloatArray(address() + offset, src, off, len);
}
public final void get(long offset, double[] dst, int off, int len) {
IO.getDoubleArray(address() + offset, dst, off, len);
}
public final void put(long offset, double[] src, int off, int len) {
IO.putDoubleArray(address() + offset, src, off, len);
}
public Pointer getPointer(long offset) {
return MemoryUtil.newPointer(getRuntime(), IO.getAddress(address() + offset));
}
public Pointer getPointer(long offset, long size) {
return MemoryUtil.newPointer(getRuntime(), IO.getAddress(this.address() + offset), size);
}
public void putPointer(long offset, Pointer value) {
IO.putAddress(address() + offset, value != null ? value.address() : 0L);
}
public String getString(long offset) {
return Charset.defaultCharset().decode(ByteBuffer.wrap(IO.getZeroTerminatedByteArray(address() + offset))).toString();
}
public String getString(long offset, int maxLength, Charset cs) {
final byte[] bytes = IO.getZeroTerminatedByteArray(address() + offset, maxLength);
return cs.decode(ByteBuffer.wrap(bytes)).toString();
}
public void putString(long offset, String string, int maxLength, Charset cs) {
ByteBuffer buf = cs.encode(string);
int len = Math.min(maxLength, buf.remaining());
IO.putZeroTerminatedByteArray(address() + offset, buf.array(), buf.arrayOffset() + buf.position(), len);
}
public void putZeroTerminatedByteArray(long offset, byte[] src, int off, int len) {
IO.putZeroTerminatedByteArray(address() + offset, src, off, len);
}
public int indexOf(long offset, byte value, int maxlen) {
return (int) IO.indexOf(address() + offset, value, maxlen);
}
public final void setMemory(long offset, long size, byte value) {
IO.setMemory(this.address() + offset, size, value);
}
}