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PowerAPI sensor providing power metrics from a PowerSpy outlet under a Linux platform. See also http://www.alciom.com/fr/produits/powerspy2.html

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/**
 * Copyright (C) 2012 Inria, University Lille 1.
 *
 * This file is part of PowerAPI.
 *
 * PowerAPI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * PowerAPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with PowerAPI. If not, see .
 *
 * Contact: [email protected].
 */
package fr.inria.powerapi.sensor.powerspy;

import java.nio.ByteOrder;

public class IEEE754Utils {
	public static Float fromString(String bits) throws NumberFormatException {
		if (ByteOrder.nativeOrder().equals(ByteOrder.LITTLE_ENDIAN)) {
			char[] bitsCharArray = bits.toCharArray();
			for (int i = 0; i < bitsCharArray.length / 2; i += 2) {
				char first = bitsCharArray[i];
				char second = bitsCharArray[i + 1];
				bitsCharArray[i] = bitsCharArray[bitsCharArray.length - i - 2];
				bitsCharArray[i + 1] = bitsCharArray[bitsCharArray.length - i
						- 1];
				bitsCharArray[bitsCharArray.length - i - 2] = first;
				bitsCharArray[bitsCharArray.length - i - 1] = second;
			}
			bits = String.valueOf(bitsCharArray);
		}
		return Float.intBitsToFloat(Integer.valueOf(bits, 16));
	}
}