cartitv3.h
//
// cartitv3.h
//
// Copyright (C) 1996 Limit Point Systems, Inc.
//
// Author: Curtis Janssen <cljanss@limitpt.com>
// Maintainer: LPS
//
// This file is part of the SC Toolkit.
//
// The SC Toolkit is free software; you can redistribute it and/or modify
// it under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// The SC Toolkit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with the SC Toolkit; see the file COPYING.LIB. If not, write to
// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
//
// The U.S. Government is granted a limited license as per AL 91-7.
//
#ifndef _chemistry_qc_intv3_cartitv3_h
#define _chemistry_qc_intv3_cartitv3_h
#include <chemistry/qc/basis/cartiter.h>
namespace sc {
class CartesianIterV3 : public CartesianIter {
public:
CartesianIterV3(int l) : CartesianIter(l) {}
void start() {
bfn_=a_=c_=0;
b_=l_;
}
void next() {
if (c_<l_-a_)
c_++;
else {
c_=0;
a_++;
}
bfn_++;
b_ = l_-a_-c_;
}
operator int() {
return (a_ <= l_);
}
};
class RedundantCartesianIterV3 : public RedundantCartesianIter {
public:
RedundantCartesianIterV3(int l) : RedundantCartesianIter(l) {}
int bfn() {
int i = a();
int j = b();
int am = l();
return (((((((am)+1)<<1)-(i))*((i)+1))>>1)-(j)-1);
}
};
class RedundantCartesianSubIterV3 : public RedundantCartesianSubIter {
public:
RedundantCartesianSubIterV3(int l) : RedundantCartesianSubIter(l) {}
int bfn() {
int i = a();
int j = b();
int am = l();
return (((((((am)+1)<<1)-(i))*((i)+1))>>1)-(j)-1);
}
};
}
#endif
// Local Variables:
// mode: c++
// c-file-style: "CLJ"
// End: