/*
* Copyright (C) 2012 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.converters;
import jnr.ffi.*;
import jnr.ffi.mapper.ToNativeContext;
import jnr.ffi.mapper.ToNativeConverter;
import jnr.ffi.provider.MemoryManager;
import jnr.ffi.provider.ParameterFlags;
/**
* Converts a Pointer[] array to a int[] array parameter
*/
@ToNativeConverter.NoContext
@ToNativeConverter.Cacheable
public class Pointer32ArrayParameterConverter implements ToNativeConverter<Pointer[], int[]> {
protected final jnr.ffi.Runtime runtime;
protected final int parameterFlags;
public static ToNativeConverter<Pointer[], int[]> getInstance(ToNativeContext toNativeContext) {
int parameterFlags = ParameterFlags.parse(toNativeContext.getAnnotations());
return !ParameterFlags.isOut(parameterFlags)
? new Pointer32ArrayParameterConverter(toNativeContext.getRuntime(), parameterFlags)
: new Pointer32ArrayParameterConverter.Out(toNativeContext.getRuntime(), parameterFlags);
}
Pointer32ArrayParameterConverter(jnr.ffi.Runtime runtime, int parameterFlags) {
this.runtime = runtime;
this.parameterFlags = parameterFlags;
}
@Override
public Class<int[]> nativeType() {
return int[].class;
}
@Override
public int[] toNative(Pointer[] pointers, ToNativeContext context) {
if (pointers == null) {
return null;
}
int[] primitive = new int[pointers.length];
if (ParameterFlags.isIn(parameterFlags)) {
for (int i = 0; i < pointers.length; i++) {
if (pointers[i] != null && !pointers[i].isDirect()) {
throw new IllegalArgumentException("invalid pointer in array at index " + i);
}
primitive[i] = pointers[i] != null ? (int) pointers[i].address() : 0;
}
}
return primitive;
}
public static final class Out extends Pointer32ArrayParameterConverter implements ToNativeConverter.PostInvocation<Pointer[], int[]> {
public Out(jnr.ffi.Runtime runtime, int parameterFlags) {
super(runtime, parameterFlags);
}
@Override
public void postInvoke(Pointer[] pointers, int[] primitive, ToNativeContext context) {
if (pointers != null && primitive != null && ParameterFlags.isOut(parameterFlags)) {
MemoryManager mm = runtime.getMemoryManager();
for (int i = 0; i < pointers.length; i++) {
pointers[i] = mm.newPointer(primitive[i]);
}
}
}
}
}