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/*
* Copyright (C) 2013 RoboVM AB
*
* 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 com.bugvm.rt.bro;
import java.lang.reflect.Field;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.CharBuffer;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;
import com.bugvm.rt.VM;
import com.bugvm.rt.bro.annotation.MarshalsArray;
import com.bugvm.rt.bro.annotation.MarshalsPointer;
/**
* Contains marshalers for {@link Buffer} subclasses.
*/
public class BufferMarshalers {
/**
* Marshals to/from {@link ByteBuffer}, {@link ShortBuffer},
* {@link CharBuffer}, {@link IntBuffer}, {@link LongBuffer},
* {@link FloatBuffer} and {@link DoubleBuffer}.
*/
public static class BufferMarshaler {
private static final int EFFECTIVE_DIRECT_ADDRESS_OFFSET;
private static final int _ELEMENT_SIZE_SHIFT_OFFSET;
static {
try {
Field f1 = Buffer.class.getDeclaredField("effectiveDirectAddress");
if (f1.getType() != long.class) {
throw new Error("java.nio.Buffer.effectiveDirectAddress should be a long");
}
EFFECTIVE_DIRECT_ADDRESS_OFFSET = VM.getInstanceFieldOffset(VM.getFieldAddress(f1));
Field f2 = Buffer.class.getDeclaredField("_elementSizeShift");
_ELEMENT_SIZE_SHIFT_OFFSET = VM.getInstanceFieldOffset(VM.getFieldAddress(f2));
} catch (NoSuchFieldException e) {
throw new Error(e);
}
}
@MarshalsPointer(supportedCallTypes = MarshalerFlags.CALL_TYPE_BRIDGE)
public static long toNative(Buffer buffer, long flags) {
if (buffer == null) {
return 0L;
}
if (!buffer.isDirect() && !buffer.hasArray()) {
// Non-direct buffers must be backed by an array to be supported.
// We could have made a copy of the buffer contents and returned
// a pointer to that but then changes made to the contents by
// native code wouldn't be visible in the original buffer and
// the semantics would be different depending on the type of
// the buffer.
throw new IllegalArgumentException("Only direct and array-backed "
+ "java.nio.Buffers can be marshaled to pointers.");
}
if (buffer.isDirect()) {
return VM.getLong(VM.getObjectAddress(buffer) + EFFECTIVE_DIRECT_ADDRESS_OFFSET);
} else {
Object array = buffer.array();
int offset = buffer.arrayOffset();
int shift = VM.getInt(VM.getObjectAddress(buffer) + _ELEMENT_SIZE_SHIFT_OFFSET);
return VM.getArrayValuesAddress(array) + (offset << shift);
}
}
private static void copyBuffer(Buffer buffer, long handle, long flags, int d1) {
if (d1 != buffer.capacity()) {
Class cls = null;
if (buffer instanceof ByteBuffer) {
cls = ByteBuffer.class;
} else if (buffer instanceof ShortBuffer) {
cls = ShortBuffer.class;
} else if (buffer instanceof CharBuffer) {
cls = CharBuffer.class;
} else if (buffer instanceof IntBuffer) {
cls = IntBuffer.class;
} else if (buffer instanceof LongBuffer) {
cls = LongBuffer.class;
} else if (buffer instanceof FloatBuffer) {
cls = FloatBuffer.class;
} else if (buffer instanceof DoubleBuffer) {
cls = DoubleBuffer.class;
}
throw new IllegalArgumentException("Expected " +
cls.getName() + " of capacity " + d1
+ ". Got " + cls.getName() + " of capacity "
+ buffer.capacity());
}
long src = 0L;
Object array = null;
int offset = 0;
int shift = VM.getInt(VM.getObjectAddress(buffer) + _ELEMENT_SIZE_SHIFT_OFFSET);
if (buffer.isDirect()) {
src = VM.getLong(VM.getObjectAddress(buffer) + EFFECTIVE_DIRECT_ADDRESS_OFFSET);
} else {
if (buffer.hasArray()) {
array = buffer.array();
offset = buffer.arrayOffset();
} else {
int pos = buffer.position();
int limit = buffer.limit();
buffer.position(0);
buffer.limit(buffer.capacity());
if (buffer instanceof ByteBuffer) {
array = new byte[d1];
((ByteBuffer) buffer).get((byte[]) array);
} else if (buffer instanceof ShortBuffer) {
array = new short[d1];
((ShortBuffer) buffer).get((short[]) array);
} else if (buffer instanceof CharBuffer) {
array = new char[d1];
((CharBuffer) buffer).get((char[]) array);
} else if (buffer instanceof IntBuffer) {
array = new int[d1];
((IntBuffer) buffer).get((int[]) array);
} else if (buffer instanceof LongBuffer) {
array = new long[d1];
((LongBuffer) buffer).get((long[]) array);
} else if (buffer instanceof FloatBuffer) {
array = new float[d1];
((FloatBuffer) buffer).get((float[]) array);
} else if (buffer instanceof DoubleBuffer) {
array = new double[d1];
((DoubleBuffer) buffer).get((double[]) array);
}
buffer.position(pos);
buffer.limit(limit);
}
src = VM.getArrayValuesAddress(array);
}
VM.memcpy(handle, src + (offset << shift), d1 << shift);
}
@MarshalsArray
public static ByteBuffer toByteBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1);
}
@MarshalsArray
public static void toNative(ByteBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static ByteBuffer toByteBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toByteBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(ByteBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static ByteBuffer toByteBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toByteBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(ByteBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static ShortBuffer toShortBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 1).order(ByteOrder.nativeOrder()).asShortBuffer();
}
@MarshalsArray
public static void toNative(ShortBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static ShortBuffer toShortBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toShortBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(ShortBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static ShortBuffer toShortBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toShortBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(ShortBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static CharBuffer toCharBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 1).order(ByteOrder.nativeOrder()).asCharBuffer();
}
@MarshalsArray
public static void toNative(CharBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static CharBuffer toCharBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toCharBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(CharBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static CharBuffer toCharBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toCharBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(CharBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static IntBuffer toIntBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 2).order(ByteOrder.nativeOrder()).asIntBuffer();
}
@MarshalsArray
public static void toNative(IntBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static IntBuffer toIntBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toIntBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(IntBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static IntBuffer toIntBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toIntBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(IntBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static LongBuffer toLongBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 3).order(ByteOrder.nativeOrder()).asLongBuffer();
}
@MarshalsArray
public static void toNative(LongBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static LongBuffer toLongBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toLongBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(LongBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static LongBuffer toLongBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toLongBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(LongBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static FloatBuffer toFloatBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 2).order(ByteOrder.nativeOrder()).asFloatBuffer();
}
@MarshalsArray
public static void toNative(FloatBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static FloatBuffer toFloatBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toFloatBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(FloatBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static FloatBuffer toFloatBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toFloatBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(FloatBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static DoubleBuffer toDoubleBuffer(Class cls, long handle, long flags, int d1) {
return VM.newDirectByteBuffer(handle, d1 << 3).order(ByteOrder.nativeOrder()).asDoubleBuffer();
}
@MarshalsArray
public static void toNative(DoubleBuffer buffer, long handle, long flags, int d1) {
copyBuffer(buffer, handle, flags, d1);
}
@MarshalsArray
public static DoubleBuffer toDoubleBuffer(Class cls, long handle, long flags, int d1, int d2) {
return toDoubleBuffer(cls, handle, flags, d1 * d2);
}
@MarshalsArray
public static void toNative(DoubleBuffer buffer, long handle, long flags, int d1, int d2) {
copyBuffer(buffer, handle, flags, d1 * d2);
}
@MarshalsArray
public static DoubleBuffer toDoubleBuffer(Class cls, long handle, long flags, int d1, int d2, int d3) {
return toDoubleBuffer(cls, handle, flags, d1 * d2 * d3);
}
@MarshalsArray
public static void toNative(DoubleBuffer buffer, long handle, long flags, int d1, int d2, int d3) {
copyBuffer(buffer, handle, flags, d1 * d2 * d3);
}
}
}
