mirror of https://github.com/FreeCol/freecol.git
79 lines
2.0 KiB
Java
79 lines
2.0 KiB
Java
/**
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* Copyright (C) 2002-2021 The FreeCol Team
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*
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* This file is part of FreeCol.
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*
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* FreeCol is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* FreeCol is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with FreeCol. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.sf.freecol.common;
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import java.security.SecureRandom;
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/**
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* A wrapper for the pseudo-random number generator seed.
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*/
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public class FreeColSeed {
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public static final long DEFAULT_SEED = 0L;
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/** The seed to use for pseudo-random number generators. */
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private static long freeColSeed = DEFAULT_SEED;
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/** Has a seed been set? */
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private static boolean seeded = false;
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/**
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* Gets the seed for the PRNG.
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*
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* @return The seed.
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*/
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public static long getFreeColSeed() {
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return FreeColSeed.freeColSeed;
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}
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/**
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* Has the game been seeded?
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*
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* @return True if a seed has been set.
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*/
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public static boolean hasFreeColSeed() {
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return FreeColSeed.seeded;
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}
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/**
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* Generate a new seed.
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*/
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public static void generateFreeColSeed() {
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FreeColSeed.freeColSeed = new SecureRandom().nextLong();
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}
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/**
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* Sets the seed for the PRNG.
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*
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* @param arg A string defining the seed.
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* @return True if the seed was set successfully.
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*/
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public static boolean setFreeColSeed(String arg) {
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try {
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FreeColSeed.freeColSeed = Long.parseLong(arg);
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FreeColSeed.seeded = true;
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return true;
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} catch (NumberFormatException nfe) {}
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return false;
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}
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}
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