| /* |
| * Copyright (C) 2007 The Android Open Source 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 com.android.ddmlib.utils; |
| |
| /** |
| * Utility class providing array to int/long conversion for data received from devices through adb. |
| */ |
| public final class ArrayHelper { |
| |
| /** |
| * Swaps an unsigned value around, and puts the result in an array that can be sent to a device. |
| * @param value The value to swap. |
| * @param dest the destination array |
| * @param offset the offset in the array where to put the swapped value. |
| * Array length must be at least offset + 4 |
| */ |
| public static void swap32bitsToArray(int value, byte[] dest, int offset) { |
| dest[offset] = (byte)(value & 0x000000FF); |
| dest[offset + 1] = (byte)((value & 0x0000FF00) >> 8); |
| dest[offset + 2] = (byte)((value & 0x00FF0000) >> 16); |
| dest[offset + 3] = (byte)((value & 0xFF000000) >> 24); |
| } |
| |
| /** |
| * Reads a signed 32 bit integer from an array coming from a device. |
| * @param value the array containing the int |
| * @param offset the offset in the array at which the int starts |
| * @return the integer read from the array |
| */ |
| public static int swap32bitFromArray(byte[] value, int offset) { |
| int v = 0; |
| v |= ((int)value[offset]) & 0x000000FF; |
| v |= (((int)value[offset + 1]) & 0x000000FF) << 8; |
| v |= (((int)value[offset + 2]) & 0x000000FF) << 16; |
| v |= (((int)value[offset + 3]) & 0x000000FF) << 24; |
| |
| return v; |
| } |
| |
| /** |
| * Reads an unsigned 16 bit integer from an array coming from a device, |
| * and returns it as an 'int' |
| * @param value the array containing the 16 bit int (2 byte). |
| * @param offset the offset in the array at which the int starts |
| * Array length must be at least offset + 2 |
| * @return the integer read from the array. |
| */ |
| public static int swapU16bitFromArray(byte[] value, int offset) { |
| int v = 0; |
| v |= ((int)value[offset]) & 0x000000FF; |
| v |= (((int)value[offset + 1]) & 0x000000FF) << 8; |
| |
| return v; |
| } |
| |
| /** |
| * Reads a signed 64 bit integer from an array coming from a device. |
| * @param value the array containing the int |
| * @param offset the offset in the array at which the int starts |
| * Array length must be at least offset + 8 |
| * @return the integer read from the array |
| */ |
| public static long swap64bitFromArray(byte[] value, int offset) { |
| long v = 0; |
| v |= ((long)value[offset]) & 0x00000000000000FFL; |
| v |= (((long)value[offset + 1]) & 0x00000000000000FFL) << 8; |
| v |= (((long)value[offset + 2]) & 0x00000000000000FFL) << 16; |
| v |= (((long)value[offset + 3]) & 0x00000000000000FFL) << 24; |
| v |= (((long)value[offset + 4]) & 0x00000000000000FFL) << 32; |
| v |= (((long)value[offset + 5]) & 0x00000000000000FFL) << 40; |
| v |= (((long)value[offset + 6]) & 0x00000000000000FFL) << 48; |
| v |= (((long)value[offset + 7]) & 0x00000000000000FFL) << 56; |
| |
| return v; |
| } |
| } |