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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1994-2025 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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 3 of the License, or
// (at your option) any later version.
//
// Octave 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.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING. If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////
#if defined (HAVE_CONFIG_H)
# include "config.h"
#endif
// Instantiate Arrays of float values.
#include "lo-mappers.h"
#include "Array.h"
// Prevent implicit instantiations on some systems (Windows, others?)
// that can lead to duplicate definitions of static data members.
extern template class OCTAVE_EXTERN_TEMPLATE_API Array<octave::idx_vector>;
extern template class Array<octave_idx_type>;
#include "Array-base.cc"
#include "oct-locbuf.h"
#define INLINE_ASCENDING_SORT 1
#define INLINE_DESCENDING_SORT 1
#include "oct-sort.cc"
template <>
inline bool
sort_isnan<float> (float x)
{
return octave::math::isnan (x);
}
static bool
nan_ascending_compare (float x, float y)
{
return octave::math::isnan (y) ? ! octave::math::isnan (x) : x < y;
}
static bool
nan_descending_compare (float x, float y)
{
return octave::math::isnan (x) ? ! octave::math::isnan (y) : x > y;
}
Array<float>::compare_fcn_type
safe_comparator (sortmode mode, const Array<float>& a, bool allow_chk)
{
Array<float>::compare_fcn_type result = nullptr;
if (allow_chk)
{
octave_idx_type k = 0;
for (; k < a.numel () && ! octave::math::isnan (a(k)); k++) ;
if (k == a.numel ())
{
if (mode == ASCENDING)
result = octave_sort<float>::ascending_compare;
else if (mode == DESCENDING)
result = octave_sort<float>::descending_compare;
}
}
if (! result)
{
if (mode == ASCENDING)
result = nan_ascending_compare;
else if (mode == DESCENDING)
result = nan_descending_compare;
}
return result;
}
// The default solution using NaN-safe comparator is OK, but almost twice as
// slow than this code.
template <>
OCTAVE_API
sortmode
Array<float>::issorted (sortmode mode) const
{
octave_idx_type n = numel ();
const float *el = data ();
if (n <= 1)
return (mode == UNSORTED) ? ASCENDING : mode;
if (mode == UNSORTED)
{
// Auto-detect mode.
if (el[n-1] < el[0] || octave::math::isnan (el[0]))
mode = DESCENDING;
else
mode = ASCENDING;
}
if (mode == DESCENDING)
{
octave_idx_type j = 0;
float r;
// Sort out NaNs.
do
r = el[j++];
while (octave::math::isnan (r) && j < n);
// Orient the test so that NaN will not pass through.
for (; j < n; j++)
{
if (r >= el[j])
r = el[j];
else
{
mode = UNSORTED;
break;
}
}
}
else // mode == ASCENDING
{
// Sort out NaNs.
while (n > 0 && octave::math::isnan (el[n-1]))
n--;
if (n > 0)
{
// Orient the test so that NaN will not pass through.
float r = el[0];
for (octave_idx_type j = 1; j < n; j++)
{
if (r <= el[j])
r = el[j];
else
{
mode = UNSORTED;
break;
}
}
}
}
return mode;
}
template class octave_sort<float>;
INSTANTIATE_ARRAY (float, OCTAVE_CLASS_TEMPLATE_INSTANTIATION_API);
template OCTAVE_API std::ostream& operator << (std::ostream&,
const Array<float>&);
#include "DiagArray2.h"
#include "DiagArray2.cc"
template class DiagArray2<float>;
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