utils.java

/*
 * HalfNES by Andrew Hoffman
 * Licensed under the GNU GPL Version 3. See LICENSE file
 */
package com.grapeshot.halfnes;

import java.util.Locale;

public class utils {

    private utils() {}
    
    public final static int BIT0 = 1, BIT1 = 2, BIT2 = 4, BIT3 = 8, BIT4 = 16,
            BIT5 = 32, BIT6 = 64, BIT7 = 128, BIT8 = 256, BIT9 = 512,
            BIT10 = 1024, BIT11 = 2048, BIT12 = 4096, BIT13 = 8192,
            BIT14 = 16384, BIT15 = 32768;

    public static int setbit(final int num, final int bitnum, final boolean state) {
        return (state) ? (num | (1 << bitnum)) : (num & ~(1 << bitnum));
    }

    public static String hex(final int num) {
        String s = Integer.toHexString(num).toUpperCase(Locale.US);
        if ((s.length() & 1) == 1) {
            s = "0" + s;
        }
        return s;
    }

    public static String hex(final long num) {
        String s = Long.toHexString(num).toUpperCase(Locale.US);
        if ((s.length() & 1) == 1) {
            s = "0" + s;
        }
        return s;
    }

    public static int reverseByte(int nibble) {
        //reverses 8 bits packed into int.
        return (Integer.reverse(nibble) >> 24) & 0xff;
    }

    public static void printarray(final int[] a) {
        StringBuilder s = new StringBuilder();
        for (int i : a) {
            s.append(i);
            s.append(", ");
        }
        if (s.length() >= 1) {
            s.deleteCharAt(s.length() - 1);
        }
        s.append("\n");
        System.err.print(s.toString());
    }

    public static void printarray(final boolean[] a) {
        StringBuilder s = new StringBuilder();
        for (boolean i : a) {
            s.append(i);
            s.append(", ");
        }
        if (s.length() >= 1) {
            s.deleteCharAt(s.length() - 1);
        }
        s.append("\n");
        System.err.print(s.toString());
    }

    public static void printarray(final double[] a) {
        StringBuilder s = new StringBuilder();
        for (double i : a) {
            s.append(i);
            s.append(", ");
        }
        if (s.length() >= 1) {
            s.deleteCharAt(s.length() - 1);
        }
        s.append("\n");
        System.err.print(s.toString());
    }

    public static void printarray(final float[] a) {
        StringBuilder s = new StringBuilder();
        for (float i : a) {
            s.append(i);
            s.append(", ");
        }
        if (s.length() >= 1) {
            s.deleteCharAt(s.length() - 1);
        }
        s.append("\n");
        System.err.print(s.toString());
    }

    public static void printarray(final Object[] a) {
        StringBuilder s = new StringBuilder();
        for (Object i : a) {
            s.append(i.toString());
            s.append(", ");
        }
        if (s.length() >= 1) {
            s.deleteCharAt(s.length() - 1);
        }
        s.append("\n");
        System.err.print(s.toString());
    }

    public static int max(final int[] array) {
        int m = array[0];
        for (Integer i : array) {
            if (i > m) {
                m = i;
            }
        }
        return m;
    }
}