1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  ?Description

    15 *

    16 */

    17 

    18 

    19 #include <e32def.h>

    20 #include <e32cmn.h>

    21 #include <e32std.h>

    22 

    23 #include "jutils.h"

    24 #include "jni.h"

    25 

    26 

    27 

    28 

    29 enum TJavaArrayPanic

    30 {

    31     EBadOffsetIntoJavaArray,

    32     EWritingOverEndOfJavaArray,

    33     EBadOffsetIntoJavaArrayForRead,

    34     EReadingOverEndOfJavaArray,

    35 };

    36 

    37 

    38 

    39 /**

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

    41 * @param aJni The JNI environment.

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

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

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

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

    46 * @returns An error code.

    47 */

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

    49         TInt aOffset, TInt aLength, TDes8& aNativeBuffer)

    50 {

    51 

    52     aNativeBuffer.SetLength(aLength);

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

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

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

    56     return KErrNone;

    57 }

    58 

    59 

    60 

    61 /**

    62 * Copies data from the native to the Java array.

    63 * @return The number of bytes copied.

    64 */

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

    66                                        jbyteArray aJavaBuffer, TInt aOffset, TInt aLength)

    67 {

    68 

    69     TInt nativeBufferLength = aNativeBuffer.Length();

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

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

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

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

    74     return length;

    75 }

    76 

    77 

    78 

    79 

    80 

    81 

    82