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rtest.icc

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/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2003
 *
 *  Last modified:
 *     $Date: 2006-06-08 14:20:28 +0200 (Thu, 08 Jun 2006) $ by $Author: schulte $
 *     $Revision: 3275 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  See the file "LICENSE" for information on usage and
 *  redistribution of this file, and for a
 *     DISCLAIMER OF ALL WARRANTIES.
 *
 */

namespace Gecode { namespace Int {

  /*
   * Testing equality
   *
   */

  template <class View>
  forceinline RelTest
  rtest_eq_bnd(View x, View y) {
    if ((x.min() > y.max()) || (x.max() < y.min())) return RT_FALSE;
    return (x.assigned() && y.assigned()) ? RT_TRUE : RT_MAYBE;
  }

  template <class View>
  RelTest
  rtest_eq_dom_check(View x, View y) {
    ViewRanges<View> rx(x), ry(y);
    while (rx() && ry()) {
      if (rx.max() < ry.min()) {
        ++rx;
      } else if (ry.max() < rx.min()) {
        ++ry;
      } else return RT_MAYBE;
    }
    return RT_FALSE;
  }

  template <class View>
  forceinline RelTest
  rtest_eq_dom(View x, View y) {
    RelTest rt = rtest_eq_bnd(x,y);
    if (rt != RT_MAYBE) return rt;
    return (x.range() && y.range()) ? RT_MAYBE : rtest_eq_dom_check(x,y);
  }


  template <class View>
  forceinline RelTest
  rtest_eq_bnd(View x, int n) {
    if ((n > x.max()) || (n < x.min())) return RT_FALSE;
    return x.assigned() ? RT_TRUE : RT_MAYBE;
  }

  template <class View>
  RelTest
  rtest_eq_dom_check(View x, int n) {
    ViewRanges<View> rx(x);
    while (n > rx.max()) ++rx;
    return (n >= rx.min()) ? RT_MAYBE : RT_FALSE;
  }

  template <class View>
  forceinline RelTest
  rtest_eq_dom(View x, int n) {
    RelTest rt = rtest_eq_bnd(x,n);
    if (rt != RT_MAYBE) return rt;
    return x.range() ? RT_MAYBE : rtest_eq_dom_check(x,n);
  }



  /*
   * Testing disequality
   *
   */

  template <class View>
  forceinline RelTest
  rtest_nq_bnd(View x, View y) {
    if ((x.min() > y.max()) || (x.max() < y.min())) return RT_TRUE;
    return (x.assigned() && y.assigned()) ? RT_FALSE : RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_nq_dom_check(View x, View y) {
    ViewRanges<View> rx(x), ry(y);
    while (rx() && ry()) {
      if (rx.max() < ry.min()) {
        ++rx;
      } else if (ry.max() < rx.min()) {
        ++ry;
      } else return RT_MAYBE;
    }
    return RT_TRUE;
  }

  template <class View>
  forceinline RelTest
  rtest_nq_dom(View x, View y) {
    RelTest rt = rtest_nq_bnd(x,y);
    if (rt != RT_MAYBE) return rt;
    return (x.range() && y.range()) ? RT_MAYBE : rtest_nq_dom_check(x,y);
  }


  template <class View>
  forceinline RelTest
  rtest_nq_bnd(View x, int n) {
    if ((n > x.max()) || (n < x.min())) return RT_TRUE;
    return (x.assigned()) ? RT_FALSE : RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_nq_dom_check(View x, int n) {
    ViewRanges<View> rx(x);
    while (n > rx.max()) ++rx;
    return (n >= rx.min()) ? RT_MAYBE : RT_TRUE;
  }

  template <class View>
  forceinline RelTest
  rtest_nq_dom(View x, int n) {
    RelTest rt = rtest_nq_bnd(x,n);
    if (rt != RT_MAYBE) return rt;
    return x.range() ? RT_MAYBE : rtest_nq_dom_check(x,n);
  }


  /*
   * Testing inequalities
   *
   */

  template <class View>
  forceinline RelTest
  rtest_lq(View x, int n) {
    if (x.max() <= n) return RT_TRUE;
    if (x.min() > n)  return RT_FALSE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_lq(View x, View y) {
    if (x.max() <= y.min()) return RT_TRUE;
    if (x.min() > y.max())  return RT_FALSE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_le(View x, int n) {
    if (x.max() <  n) return RT_TRUE;
    if (x.min() >= n) return RT_FALSE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_le(View x, View y) {
    if (x.max() <  y.min()) return RT_TRUE;
    if (x.min() >= y.max()) return RT_FALSE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_gq(View x, int n) {
    if (x.max() <  n) return RT_FALSE;
    if (x.min() >= n) return RT_TRUE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_gq(View x, View y) {
    if (x.max() <  y.min()) return RT_FALSE;
    if (x.min() >= y.max()) return RT_TRUE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_gr(View x, int n) {
    if (x.max() <= n) return RT_FALSE;
    if (x.min() >  n) return RT_TRUE;
    return RT_MAYBE;
  }

  template <class View>
  forceinline RelTest
  rtest_gr(View x, View y) {
    if (x.max() <= y.min()) return RT_FALSE;
    if (x.min() >  y.max()) return RT_TRUE;
    return RT_MAYBE;
  }

}}

// STATISTICS: int-var