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/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program 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 General Public License for more details.
--------------------------------------------------------------------------------
*/
#pragma once
#include "polymake/client.h"
#include "polymake/linalg.h"
#include "polymake/permutations.h"
namespace polymake { namespace polytope {
template <typename Iterator> inline
void canonicalize_oriented(Iterator&& it)
{
typedef typename pm::iterator_traits<Iterator>::value_type Scalar;
while (!it.at_end() && is_zero(*it))
++it;
if (!it.at_end() && !abs_equal(*it, one_value<Scalar>())) {
const Scalar leading=abs(*it);
auto&& tail=ensure_private_mutable(std::forward<Iterator>(it));
do *tail /= leading; while (!(++tail).at_end());
}
}
} }
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