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package com.diozero.util;
/*
* #%L
* Organisation: mattjlewis
* Project: Device I/O Zero - Core
* Filename: IOUtil.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2017 mattjlewis
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class IOUtil {
public static final ByteOrder DEFAULT_BYTE_ORDER = ByteOrder.BIG_ENDIAN;
//public static final ByteOrder DEFAULT_BYTE_ORDER = ByteOrder.nativeOrder();
/**
* Get an unsigned int value from a signed byte
* @param b input value
* @return byte values from -127..128 convert 128..255
*/
public static int asInt(byte b) {
return b & 0xff;
}
public static short getShort(ByteBuffer buffer) {
return getShort(buffer, DEFAULT_BYTE_ORDER);
}
public static short getShort(ByteBuffer buffer, ByteOrder order) {
buffer.order(order);
return buffer.getShort();
}
public static int getUShort(ByteBuffer buffer) {
return getUShort(buffer, DEFAULT_BYTE_ORDER);
}
public static int getUShort(ByteBuffer buffer, ByteOrder order) {
buffer.order(order);
return buffer.getShort() & 0xffff;
}
public static long getUInt(ByteBuffer buffer) {
return getUInt(buffer, buffer.capacity(), DEFAULT_BYTE_ORDER);
}
public static long getUInt(ByteBuffer buffer, ByteOrder order) {
return getUInt(buffer, buffer.capacity(), order);
}
public static long getUInt(ByteBuffer buffer, int length) {
return getUInt(buffer, length, DEFAULT_BYTE_ORDER);
}
public static long getUInt(ByteBuffer buffer, int length, ByteOrder order) {
byte[] data = new byte[length];
buffer.get(data);
// Normal order:
// ((data[0] << 8) & 0xFF00) | (data[1] & 0xFF);
// Reverse order:
// ((data[1] << 8) & 0xFF00) | (data[0] & 0xFF);
long val = 0;
for (int i=0; i
