/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  ?Description

*

*/

#include <e32def.h>

#include <e32cmn.h>

#include <e32std.h>

#include "jutils.h"

#include "jni.h"

enum TJavaArrayPanic

{

    EBadOffsetIntoJavaArray,

    EWritingOverEndOfJavaArray,

    EBadOffsetIntoJavaArrayForRead,

    EReadingOverEndOfJavaArray,

};

/**

* Accesses the Java array and copies its data into the native descriptor.

* @param aJni The JNI environment.

* @param aJavaBuffer The Java buffer to copy data from.

* @param aOffset Start of data in Java buffer to copy. This is assumed to be valid.

* @param aLength Amount of data to copy. This is assumed to be valid.

* @param aNativeBuffer Target for data. This is assumed to be long enough.

* @returns An error code.

*/

OS_EXPORT  TInt ArrayUtils::CopyToNative(JNIEnv& aJni, jbyteArray aJavaBuffer,

        TInt aOffset, TInt aLength, TDes8& aNativeBuffer)

{

    aNativeBuffer.SetLength(aLength);

    TUint8* nativeBufferPtr = const_cast<TUint8*>(aNativeBuffer.Ptr());

    jbyte* jNativeBufferPtr = reinterpret_cast<jbyte*>(nativeBufferPtr);

    aJni.GetByteArrayRegion(aJavaBuffer, aOffset, aLength, jNativeBufferPtr);

    return KErrNone;

}

/**

* Copies data from the native to the Java array.

* @return The number of bytes copied.

*/

OS_EXPORT  TInt ArrayUtils::CopyToJava(JNIEnv& aJni, const TDesC8& aNativeBuffer,

                                       jbyteArray aJavaBuffer, TInt aOffset, TInt aLength)

{

    TInt nativeBufferLength = aNativeBuffer.Length();

    TInt length = (nativeBufferLength < aLength) ? nativeBufferLength : aLength;

    TUint8* nativeBufferPtr = const_cast<TUint8*>(aNativeBuffer.Ptr());

    jbyte* jNativeBufferPtr = reinterpret_cast<jbyte*>(nativeBufferPtr);

    aJni.SetByteArrayRegion(aJavaBuffer, aOffset, length, jNativeBufferPtr);

    return length;

}