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annotate liboctave/array/PermMatrix.h @ 29654:d13d090cb03a stable

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use std::size_t and std::ptrdiff_t in C++ code (bug #60471) Files affected: make_int.cc, file-editor-tab.cc, octave-qscintilla.cc, Cell.cc, Cell.h, call-stack.cc, call-stack.h, cellfun.cc, data.cc, debug.cc, dlmread.cc, error.cc, event-queue.h, fcn-info.cc, fcn-info.h, file-io.cc, ft-text-renderer.cc, gl2ps-print.cc, graphics.cc, graphics.in.h, help.cc, hex2num.cc, input.cc, latex-text-renderer.cc, load-path.cc, load-save.cc, load-save.h, ls-hdf5.cc, ls-mat-ascii.cc, ls-mat5.cc, ls-oct-text.cc, mex.cc, mexproto.h, mxarray.h, oct-map.cc, oct-stream.cc, oct-stream.h, pager.cc, pager.h, pr-output.cc, regexp.cc, settings.h, stack-frame.cc, stack-frame.h, strfns.cc, syminfo.cc, symrec.h, symscope.cc, symscope.h, symtab.cc, sysdep.cc, toplev.cc, utils.cc, utils.h, variables.cc, __fltk_uigetfile__.cc, __init_fltk__.cc, audioread.cc, gzip.cc, cdef-class.cc, cdef-manager.cc, cdef-method.cc, cdef-object.cc, cdef-object.h, ov-base-diag.cc, ov-base-diag.h, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-scalar.h, ov-base-sparse.h, ov-base.cc, ov-base.h, ov-cell.cc, ov-cell.h, ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc, ov-fcn-handle.cc, ov-java.cc, ov-lazy-idx.h, ov-perm.cc, ov-perm.h, ov-range.h, ov-str-mat.cc, ov-struct.cc, ov-struct.h, ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, ov.h, ovl.cc, octave.cc, bp-table.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.h, lex.h, lex.ll, oct-lvalue.cc, oct-parse.yy, parse.h, profiler.h, pt-eval.cc, pt-eval.h, pt-jit.cc, pt-jit.h, pt-pr-code.cc, pt-tm-const.cc, pt-tm-const.h, Array.h, CMatrix.cc, DiagArray2.h, PermMatrix.h, Sparse.h, dMatrix.cc, fCMatrix.cc, fMatrix.cc, bsxfun-defs.cc, oct-fftw.cc, oct-fftw.h, randpoisson.cc, sparse-chol.cc, mx-inlines.cc, file-ops.cc, lo-sysdep.cc, oct-env.cc, oct-time.cc, action-container.cc, action-container.h, base-list.h, caseless-str.h, cmd-edit.cc, cmd-hist.cc, data-conv.cc, data-conv.h, f77-fcn.h, file-info.cc, file-info.h, kpse.cc, kpse.h, lo-cutils.h, lo-hash.h, lo-regexp.cc, oct-base64.cc, oct-base64.h, oct-binmap.h, oct-glob.cc, oct-shlib.cc, oct-shlib.h, oct-sort.cc, oct-sparse.h, oct-string.cc, quit.cc, unwind-prot.h, url-transfer.cc, main.in.cc, mkoctfile.in.cc, and shared-fcns.h. (grafted from aef11bb4e6d1f303ad9de5688fcb7244ef48867e)
author John W. Eaton <jwe@octave.org>
date Wed, 28 Apr 2021 22:57:42 -0400
parents 0a5b15007766
children 32f4357ac8d9
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2008-2021 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_PermMatrix_h)
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27 #define octave_PermMatrix_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include "Array.h"
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32 #include "mx-defs.h"
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33
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34 // Array<T> is inherited privately so that some methods, like index, don't
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35 // produce unexpected results.
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36
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37 class OCTAVE_API PermMatrix : protected Array<octave_idx_type>
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38 {
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39 public:
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40
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41 PermMatrix (void) = default;
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42
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43 PermMatrix (const PermMatrix& m) = default;
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44
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45 PermMatrix& operator = (const PermMatrix& m) = default;
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46
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47 ~PermMatrix (void) = default;
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48
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49 PermMatrix (octave_idx_type n);
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50
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51 PermMatrix (const Array<octave_idx_type>& p, bool colp, bool check = true);
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52
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53 PermMatrix (const idx_vector& idx, bool colp, octave_idx_type n = 0);
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54
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55 octave_idx_type dim1 (void) const
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56 { return Array<octave_idx_type>::numel (); }
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57 octave_idx_type dim2 (void) const
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58 { return Array<octave_idx_type>::numel (); }
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59
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60 octave_idx_type rows (void) const { return dim1 (); }
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61 octave_idx_type cols (void) const { return dim2 (); }
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62 octave_idx_type columns (void) const { return dim2 (); }
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63
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64 octave_idx_type perm_length (void) const
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65 { return Array<octave_idx_type>::numel (); }
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66 // FIXME: a dangerous ambiguity?
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67 octave_idx_type length (void) const
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68 { return perm_length (); }
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69
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70 octave_idx_type numel (void) const { return dim1 () * dim2 (); }
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72 std::size_t byte_size (void) const
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73 { return Array<octave_idx_type>::byte_size (); }
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75 dim_vector dims (void) const { return dim_vector (dim1 (), dim2 ()); }
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76
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77 bool isempty (void) const { return numel () == 0; }
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78
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79 int ndims (void) const { return 2; }
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80
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81 const Array<octave_idx_type>& col_perm_vec (void) const
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82 { return *this; }
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83
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84 octave_idx_type
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85 elem (octave_idx_type i, octave_idx_type j) const
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86 {
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87 return (Array<octave_idx_type>::elem (j) == i) ? 1 : 0;
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88 }
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89
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90 octave_idx_type
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91 checkelem (octave_idx_type i, octave_idx_type j) const;
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92
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93 octave_idx_type
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94 operator () (octave_idx_type i, octave_idx_type j) const
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95 {
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96 return elem (i, j);
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97 }
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98
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99 // These are, in fact, super-fast.
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100 PermMatrix transpose (void) const;
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101 PermMatrix inverse (void) const;
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102
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103 // Determinant, i.e., the sign of permutation.
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104 octave_idx_type determinant (void) const;
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105
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106 // Efficient integer power of a permutation.
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107 PermMatrix power (octave_idx_type n) const;
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108
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109 bool is_col_perm (void) const { return true; }
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110 bool is_row_perm (void) const { return false; }
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111
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112 void print_info (std::ostream& os, const std::string& prefix) const
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113 { Array<octave_idx_type>::print_info (os, prefix); }
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114
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115 static PermMatrix eye (octave_idx_type n);
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116
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117 private:
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118
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119 PermMatrix pos_power (octave_idx_type m) const;
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120
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121 void setup (const Array<octave_idx_type>& p, bool colp, bool check);
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122
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123 void setup (const idx_vector& idx, bool colp, octave_idx_type n);
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124 };
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125
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126 // Multiplying permutations together.
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127 PermMatrix
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128 OCTAVE_API
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129 operator * (const PermMatrix& a, const PermMatrix& b);
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130
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131 #endif