com.opengamma.maths.lowlevelapi.functions.utilities.Abs.java Source code

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Here is the source code for com.opengamma.maths.lowlevelapi.functions.utilities.Abs.java

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/**
 * Copyright (C) 2011 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.maths.lowlevelapi.functions.utilities;

import org.apache.commons.lang.Validate;

/**
 * Absolutes a vector V returning |V|. 
 */
public class Abs {
    // stateless
    public static int[] stateless(int[] v) {
        Validate.notNull(v);
        final int n = v.length;
        int[] tmp = new int[n];
        for (int i = 0; i < n; i++) {
            tmp[i] = Math.abs(v[i]);
        }
        return tmp;
    }

    public static long[] stateless(long[] v) {
        Validate.notNull(v);
        final int n = v.length;
        long[] tmp = new long[n];
        for (int i = 0; i < n; i++) {
            tmp[i] = Math.abs(v[i]);
        }
        return tmp;
    }

    public static float[] stateless(float[] v) {
        Validate.notNull(v);
        final int n = v.length;
        float[] tmp = new float[n];
        for (int i = 0; i < n; i++) {
            tmp[i] = Math.abs(v[i]);
        }
        return tmp;
    }

    public static double[] stateless(double[] v) {
        Validate.notNull(v);
        final int n = v.length;
        double[] tmp = new double[n];
        for (int i = 0; i < n; i++) {
            tmp[i] = Math.abs(v[i]);
        }
        return tmp;
    }

    // inplace, these mangle memory
    public static void inPlace(int[] v) {
        Validate.notNull(v);
        final int n = v.length;
        for (int i = 0; i < n; i++) {
            v[i] = Math.abs(v[i]);
        }
    }

    public static void inPlace(long[] v) {
        Validate.notNull(v);
        final int n = v.length;
        for (int i = 0; i < n; i++) {
            v[i] = Math.abs(v[i]);
        }
    }

    public static void inPlace(float[] v) {
        Validate.notNull(v);
        final int n = v.length;
        for (int i = 0; i < n; i++) {
            v[i] = Math.abs(v[i]);
        }
    }

    public static void inPlace(double[] v) {
        Validate.notNull(v);
        final int n = v.length;
        for (int i = 0; i < n; i++) {
            v[i] = Math.abs(v[i]);
        }
    }

}