/vqdr/trunk

/*

 * The contests of this file is in the Public Domain.

 *

 * Created by Gustav Hartivgsson.

 */

namespace Vee {

  /**

   * At the moment this just wraps the GLib Rand things.

   * 

   * This also provides a static version of the methods.

   */

  public class Random {

    private static GLib.Once<Vee.Random> _instance;

    private GLib.Rand rand;

    private Random () {

      this.rand = new GLib.Rand ();

    }

    public static Random get_instance () {

      return _instance.once (() => {

        return new Random ();

      });

    }

    /* **** Instance versions *** */

    public double get_double () {

      return rand.next_double ();

    }

    public double get_double_range (double begin, double end) {

      return rand.double_range (begin, end);

    }

    public int32 get_int () {

      return (int32) rand.next_int ();

    }

    public int32 get_int_range (int32 begin, int32 end) {

      return rand.int_range ((int32) begin, (int32) end);

    }

    public void seed (int32 seed) {

      rand.set_seed (seed.abs());

    }

    /* **** Static versions *** */

    public static int32 get_static_int () {

      Random r = Random.get_instance ();

      return r.get_int ();

    }

    public static double get_static_double () {

      Random r = Random.get_instance ();

      return r.get_double ();

    }

    public static int32 get_static_int_range (int32 begin, int32 end) {

      Random r = Random.get_instance ();

      return r.get_int_range (begin, end);

    }

    public static double get_static_double_range (double begin, double end) {

      Random r = Random.get_instance ();

      return r.get_double_range (begin, end);

    }

  }

}