mirror of
https://codeberg.org/anoncontributorxmr/monero.git
synced 2024-11-27 05:13:25 +01:00
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
// Copyright (c) 2017-2019, The Monero Project
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other
|
|
// materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without specific
|
|
// prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// Most of this file is originally copyright (c) 2017 Raymond Chen, Microsoft
|
|
// This algorithm is adapted from Raymond Chen's code:
|
|
// https://blogs.msdn.microsoft.com/oldnewthing/20170109-00/?p=95145
|
|
|
|
#pragma once
|
|
|
|
#include <vector>
|
|
#include <functional>
|
|
#include "misc_log_ex.h"
|
|
|
|
namespace tools
|
|
{
|
|
|
|
template<typename F>
|
|
void apply_permutation(std::vector<size_t> permutation, const F &swap)
|
|
{
|
|
//sanity check
|
|
for (size_t n = 0; n < permutation.size(); ++n)
|
|
CHECK_AND_ASSERT_THROW_MES(std::find(permutation.begin(), permutation.end(), n) != permutation.end(), "Bad permutation");
|
|
|
|
for (size_t i = 0; i < permutation.size(); ++i)
|
|
{
|
|
size_t current = i;
|
|
while (i != permutation[current])
|
|
{
|
|
size_t next = permutation[current];
|
|
swap(current, next);
|
|
permutation[current] = current;
|
|
current = next;
|
|
}
|
|
permutation[current] = current;
|
|
}
|
|
}
|
|
|
|
template<typename T>
|
|
void apply_permutation(const std::vector<size_t> &permutation, std::vector<T> &v)
|
|
{
|
|
CHECK_AND_ASSERT_THROW_MES(permutation.size() == v.size(), "Mismatched vector sizes");
|
|
apply_permutation(permutation, [&v](size_t i0, size_t i1){ std::swap(v[i0], v[i1]); });
|
|
}
|
|
|
|
}
|