javaextensions/satsa/pki/src.s60/arrayutils.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 13 Oct 2010 14:23:59 +0300
branchRCL_3
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Revision: v2.2.17 Kit: 201041
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/*
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* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  ?Description
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*
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*/
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#include <e32def.h>
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#include <e32cmn.h>
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#include <e32std.h>
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#include "jutils.h"
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#include "jni.h"
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enum TJavaArrayPanic
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{
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    EBadOffsetIntoJavaArray,
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    EWritingOverEndOfJavaArray,
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    EBadOffsetIntoJavaArrayForRead,
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    EReadingOverEndOfJavaArray,
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};
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/**
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* Accesses the Java array and copies its data into the native descriptor.
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* @param aJni The JNI environment.
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* @param aJavaBuffer The Java buffer to copy data from.
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* @param aOffset Start of data in Java buffer to copy. This is assumed to be valid.
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* @param aLength Amount of data to copy. This is assumed to be valid.
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* @param aNativeBuffer Target for data. This is assumed to be long enough.
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* @returns An error code.
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*/
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OS_EXPORT  TInt ArrayUtils::CopyToNative(JNIEnv& aJni, jbyteArray aJavaBuffer,
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        TInt aOffset, TInt aLength, TDes8& aNativeBuffer)
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{
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    aNativeBuffer.SetLength(aLength);
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    TUint8* nativeBufferPtr = const_cast<TUint8*>(aNativeBuffer.Ptr());
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    jbyte* jNativeBufferPtr = reinterpret_cast<jbyte*>(nativeBufferPtr);
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    aJni.GetByteArrayRegion(aJavaBuffer, aOffset, aLength, jNativeBufferPtr);
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    return KErrNone;
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}
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/**
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* Copies data from the native to the Java array.
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* @return The number of bytes copied.
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*/
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OS_EXPORT  TInt ArrayUtils::CopyToJava(JNIEnv& aJni, const TDesC8& aNativeBuffer,
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                                       jbyteArray aJavaBuffer, TInt aOffset, TInt aLength)
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{
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    TInt nativeBufferLength = aNativeBuffer.Length();
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    TInt length = (nativeBufferLength < aLength) ? nativeBufferLength : aLength;
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    TUint8* nativeBufferPtr = const_cast<TUint8*>(aNativeBuffer.Ptr());
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    jbyte* jNativeBufferPtr = reinterpret_cast<jbyte*>(nativeBufferPtr);
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    aJni.SetByteArrayRegion(aJavaBuffer, aOffset, length, jNativeBufferPtr);
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    return length;
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}
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