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annotate liboctave/Array-b.cc @ 14026:3781981be535 ss-3-5-90

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snapshot 3.5.90 * configure.ac (AC_INIT): Version is now 3.5.90. (OCTAVE_API_VERSION_NUMBER): Now 46. (OCTAVE_RELEASE_DATE): Now 2011-12-11.
author John W. Eaton <jwe@octave.org>
date Sun, 11 Dec 2011 23:18:31 -0500
parents 12df7854fa7c
children 72c96de7a403
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1 /*
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2
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3 Copyright (C) 1996-2011 John W. Eaton
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4
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5 This file is part of Octave.
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6
8ed4362aa0d6 [project @ 1996-11-11 02:35:04 by jwe]
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 // Instantiate Arrays of bool values.
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28
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29 #include "Array.h"
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30 #include "Array.cc"
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31 #define INLINE_ASCENDING_SORT
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32 #define INLINE_DESCENDING_SORT
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33 #include "oct-sort.cc"
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34
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35 // Specialize bool sorting (aka stable partitioning).
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36
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37 template<bool desc>
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38 static void do_bool_partition (bool *data, octave_idx_type nel)
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39 {
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40 octave_idx_type k = 0;
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41 for (octave_idx_type i = 0; i < nel; i++)
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42 if (data[i] == desc)
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43 data[k++] = desc;
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44 for (octave_idx_type i = k; i < nel; i++)
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45 data[i] = ! desc;
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46 }
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47
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48 template<bool desc>
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49 static void do_bool_partition (bool *data, octave_idx_type *idx,
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50 octave_idx_type nel)
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51 {
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52 // FIXME: This is essentially a simple bucket sort.
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53 // Can it be efficiently done by std::partition?
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54 OCTAVE_LOCAL_BUFFER (octave_idx_type, jdx, nel);
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55 octave_idx_type k = 0, l = 0;
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56 for (octave_idx_type i = 0; i < nel; i++)
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57 {
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58 if (data[i] == desc)
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59 {
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60 data[k] = desc;
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61 idx[k++] = idx[i];
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62 }
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63 else
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64 jdx[l++] = idx[i];
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65 }
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66
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67 for (octave_idx_type i = k; i < nel; i++)
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68 {
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69 data[i] = ! desc;
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70 idx[i] = jdx[i-k];
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71 }
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72 }
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73
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74 template <> template <>
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75 void
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76 octave_sort<bool>::sort (bool *data, octave_idx_type nel,
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77 std::less<bool>)
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78 {
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79 do_bool_partition<false> (data, nel);
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80 }
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81
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82 template <> template <>
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83 void
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84 octave_sort<bool>::sort (bool *data, octave_idx_type nel,
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85 std::greater<bool>)
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86 {
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87 do_bool_partition<true> (data, nel);
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88 }
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89
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90 template <> template <>
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91 void
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92 octave_sort<bool>::sort (bool *data, octave_idx_type *idx, octave_idx_type nel,
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93 std::less<bool>)
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94 {
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95 do_bool_partition<false> (data, idx, nel);
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96 }
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97
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98 template <> template <>
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99 void
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100 octave_sort<bool>::sort (bool *data, octave_idx_type *idx, octave_idx_type nel,
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101 std::greater<bool>)
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102 {
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103 do_bool_partition<true> (data, idx, nel);
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104 }
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105
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106 INSTANTIATE_ARRAY_SORT (bool);
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107
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108 INSTANTIATE_ARRAY (bool, OCTAVE_API);
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109
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110 template OCTAVE_API std::ostream& operator << (std::ostream&, const Array<bool>&);
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111
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112 #include "DiagArray2.h"
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113 #include "DiagArray2.cc"
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114
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115 template class OCTAVE_API DiagArray2<bool>;