/usr/include/seqan/random/random_shuffle.h is in seqan-dev 1.3-1ubuntu2.
This file is owned by root:root, with mode 0o644.
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// SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2010, Knut Reinert, FU Berlin
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Knut Reinert or the FU Berlin 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 KNUT REINERT OR THE FU BERLIN 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
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// DAMAGE.
//
// ==========================================================================
// Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
// ==========================================================================
// Shuffling.
// ==========================================================================
#ifndef SEQAN_RANDOM_RANDOM_SHUFFLE_H_
#define SEQAN_RANDOM_RANDOM_SHUFFLE_H_
namespace seqan {
// ===========================================================================
// Forwards, Tags.
// ===========================================================================
// ===========================================================================
// Classes
// ===========================================================================
// ===========================================================================
// Metafunctions
// ===========================================================================
// ===========================================================================
// Functions
// ===========================================================================
/**
.Function.shuffle
..summary:Shuffle the given container.
..cat:Random
..include:seqan/random.h
..signature:shuffle(container, rng)
..param.container:Container to shuffle elements of.
..param.rng:Random number generator to use.
...type:Class.Rng
*/
template <typename TContainer, typename TRNG>
void shuffle(TContainer & container, TRNG & rng)
{
SEQAN_CHECKPOINT;
typedef typename Position<TContainer>::Type TPosition;
typedef typename Value<TContainer>::Type TValue;
TValue tmp;
for (TPosition i = 0, iend = length(container); i < iend; ++i) {
Pdf<Uniform<TPosition> > uniformDist(i, iend - 1);
TPosition j = pickRandomNumber(rng, uniformDist);
// swap
move(tmp, container[i]);
move(container[i], container[j]);
move(container[j], tmp);
}
}
} // namespace seqan
#endif // SEQAN_RANDOM_RANDOM_SHUFFLE_H_
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