annotate liboctave/array/Range.h @ 27923:bd51beb6205e

update formatting of copyright notices * Use <https://octave.org/copyright/> instead of <https://octave.org/COPYRIGHT.html/>. * For consistency with other comments in the Octave sources, use C++-style comments for copyright blocks in C and C++ files. * Use delimiters above and below copyright blocks that are appropriate for the language used in the file. * Eliminate extra spacing inside copyright blocks. * lex.ll (looks_like_copyright): Also allow newlines and carriage returns before the word "Copyright". * scripts/mk-doc.pl (gethelp): Also skip empty comment lines. * bp-table.cc, type.m: Adjust tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Jan 2020 11:59:41 -0500
parents 1891570abac8
children 403df0b32204
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2020 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_Range_h)
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27 #define octave_Range_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 <iosfwd>
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32
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33 #include "dMatrix.h"
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34 #include "oct-sort.h"
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36 class
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37 OCTAVE_API
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38 Range
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39 {
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40 public:
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42 Range (void)
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43 : rng_base (0), rng_limit (0), rng_inc (0), rng_numel (0), cache (1, 0) { }
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44
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45 Range (const Range& r) = default;
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46
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47 Range& operator = (const Range& r) = default;
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48
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49 ~Range (void) = default;
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50
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51 Range (double b, double l)
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52 : rng_base (b), rng_limit (l), rng_inc (1),
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53 rng_numel (numel_internal ()), cache ()
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54 {
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55 rng_limit = limit_internal ();
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56 }
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57
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58 Range (double b, double l, double i)
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59 : rng_base (b), rng_limit (l), rng_inc (i),
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60 rng_numel (numel_internal ()), cache ()
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61 {
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62 rng_limit = limit_internal ();
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63 }
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64
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65 // For operators' usage (to preserve element count).
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66 Range (double b, double i, octave_idx_type n)
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67 : rng_base (b), rng_limit (b + (n-1) * i), rng_inc (i),
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68 rng_numel (n), cache ()
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69 {
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70 if (! octave::math::isfinite (b) || ! octave::math::isfinite (i)
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71 || ! octave::math::isfinite (rng_limit))
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72 rng_numel = -2;
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73 else
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74 {
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75 // Code below is only needed if the resulting range must be 100%
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76 // correctly constructed. If the Range object created is only
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77 // a temporary one used by operators this may be unnecessary.
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78 rng_limit = limit_internal ();
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79 }
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80 }
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81
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82 double base (void) const { return rng_base; }
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83 double limit (void) const { return rng_limit; }
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84 double inc (void) const { return rng_inc; }
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85
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86 octave_idx_type numel (void) const { return rng_numel; }
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87
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88 octave_idx_type rows (void) const { return 1; }
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89
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90 octave_idx_type cols (void) const { return numel (); }
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91 octave_idx_type columns (void) const { return numel (); }
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92
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93 bool isempty (void) const { return numel () == 0; }
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94
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95 bool all_elements_are_ints (void) const;
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96
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97 Matrix matrix_value (void) const;
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98
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99 double min (void) const;
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100 double max (void) const;
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101
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102 void sort_internal (bool ascending = true);
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103 void sort_internal (Array<octave_idx_type>& sidx, bool ascending = true);
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104
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105 Matrix diag (octave_idx_type k = 0) const;
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106
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107 Range sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const;
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108 Range sort (Array<octave_idx_type>& sidx, octave_idx_type dim = 0,
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109 sortmode mode = ASCENDING) const;
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111 sortmode issorted (sortmode mode = ASCENDING) const;
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112
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113 octave_idx_type nnz (void) const;
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114
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115 // Support for single-index subscripting, without generating matrix cache.
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116
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117 double checkelem (octave_idx_type i) const;
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118 double checkelem (octave_idx_type i, octave_idx_type j) const;
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119
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120 double elem (octave_idx_type i) const;
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121 double elem (octave_idx_type /* i */, octave_idx_type j) const
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122 { return elem (j); }
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123
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124 double operator () (octave_idx_type i) const { return elem (i); }
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125 double operator () (octave_idx_type i, octave_idx_type j) const
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126 { return elem (i, j); }
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127
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128 Array<double> index (const idx_vector& i) const;
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129
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130 void set_base (double b);
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131
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132 void set_limit (double l);
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133
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134 void set_inc (double i);
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135
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136 friend OCTAVE_API std::ostream& operator << (std::ostream& os,
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137 const Range& r);
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138 friend OCTAVE_API std::istream& operator >> (std::istream& is, Range& r);
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139
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140 friend OCTAVE_API Range operator - (const Range& r);
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141 friend OCTAVE_API Range operator + (double x, const Range& r);
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142 friend OCTAVE_API Range operator + (const Range& r, double x);
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143 friend OCTAVE_API Range operator - (double x, const Range& r);
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144 friend OCTAVE_API Range operator - (const Range& r, double x);
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145 friend OCTAVE_API Range operator * (double x, const Range& r);
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146 friend OCTAVE_API Range operator * (const Range& r, double x);
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147
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148 private:
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149
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150 double rng_base;
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151 double rng_limit;
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152 double rng_inc;
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153
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154 octave_idx_type rng_numel;
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155
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156 mutable Matrix cache;
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157
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158 octave_idx_type numel_internal (void) const;
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159
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160 double limit_internal (void) const;
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161
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162 void init (void);
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163
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164 void clear_cache (void) const { cache.resize (0, 0); }
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165
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166 protected:
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167
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168 // For operators' usage (to allow all values to be set directly).
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169 Range (double b, double l, double i, octave_idx_type n)
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170 : rng_base (b), rng_limit (l), rng_inc (i),
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171 rng_numel (n), cache ()
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172 {
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173 if (! octave::math::isfinite (b) || ! octave::math::isfinite (i)
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174 || ! octave::math::isfinite (l))
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175 rng_numel = -2;
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176 }
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177 };
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178
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179 extern OCTAVE_API Range operator - (const Range& r);
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180 extern OCTAVE_API Range operator + (double x, const Range& r);
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181 extern OCTAVE_API Range operator + (const Range& r, double x);
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182 extern OCTAVE_API Range operator - (double x, const Range& r);
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183 extern OCTAVE_API Range operator - (const Range& r, double x);
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184 extern OCTAVE_API Range operator * (double x, const Range& r);
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185 extern OCTAVE_API Range operator * (const Range& r, double x);
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186
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187 #endif