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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_scalar_h) |
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24 #define octave_scalar_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cstdlib> |
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31 |
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32 #include <string> |
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33 |
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34 class ostream; |
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35 |
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36 #include "lo-mappers.h" |
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37 #include "lo-utils.h" |
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38 #include "mx-base.h" |
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39 #include "oct-alloc.h" |
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40 #include "str-vec.h" |
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41 |
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42 #include "ov-base.h" |
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43 #include "ov-typeinfo.h" |
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44 |
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45 class Octave_map; |
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46 class octave_value_list; |
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47 |
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48 class tree_walker; |
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49 |
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50 // Real scalar values. |
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51 |
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52 class |
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53 octave_scalar : public octave_base_value |
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54 { |
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55 public: |
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56 |
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57 octave_scalar (void) |
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58 : octave_base_value (), scalar (0.0) { } |
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59 |
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60 octave_scalar (double d) |
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61 : octave_base_value (), scalar (d) { } |
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62 |
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63 octave_scalar (const octave_scalar& s) |
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64 : octave_base_value (), scalar (s.scalar) { } |
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65 |
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66 ~octave_scalar (void) { } |
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67 |
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68 octave_value *clone (void) { return new octave_scalar (*this); } |
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69 |
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70 void *operator new (size_t size) |
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71 { return allocator.alloc (size); } |
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72 |
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73 void operator delete (void *p, size_t size) |
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74 { allocator.free (p, size); } |
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75 |
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76 octave_value index (const octave_value_list& idx) const; |
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77 |
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78 idx_vector index_vector (void) const { return idx_vector (scalar); } |
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79 |
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80 int rows (void) const { return 1; } |
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81 int columns (void) const { return 1; } |
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82 |
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83 bool is_defined (void) const { return true; } |
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84 bool is_real_scalar (void) const { return true; } |
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85 |
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86 octave_value all (void) const { return (scalar != 0.0); } |
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87 octave_value any (void) const { return (scalar != 0.0); } |
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88 |
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89 bool is_real_type (void) const { return true; } |
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90 bool is_scalar_type (void) const { return true; } |
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91 bool is_numeric_type (void) const { return true; } |
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92 |
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93 bool valid_as_scalar_index (void) const |
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94 { return (! xisnan (scalar) && NINT (scalar) == 1); } |
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95 |
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96 bool valid_as_zero_index (void) const |
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97 { return (! xisnan (scalar) && NINT (scalar) == 0); } |
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98 |
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99 bool is_true (void) const { return (scalar != 0.0); } |
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100 |
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101 double double_value (bool = false) const { return scalar; } |
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102 |
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103 double scalar_value (bool = false) const { return scalar; } |
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104 |
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105 Matrix matrix_value (bool = false) const { return Matrix (1, 1, scalar); } |
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106 |
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107 Complex complex_value (bool = false) const { return scalar; } |
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108 |
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109 ComplexMatrix complex_matrix_value (bool = false) const |
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110 { return ComplexMatrix (1, 1, Complex (scalar)); } |
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111 |
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112 octave_value not (void) const { return octave_value (! scalar); } |
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113 |
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114 octave_value uminus (void) const { return octave_value (- scalar); } |
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115 |
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116 octave_value transpose (void) const { return octave_value (scalar); } |
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117 |
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118 octave_value hermitian (void) const { return octave_value (scalar); } |
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119 |
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120 void increment (void) { ++scalar; } |
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121 |
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122 void decrement (void) { --scalar; } |
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123 |
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124 octave_value convert_to_str (void) const; |
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125 |
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126 void print (ostream& os, bool pr_as_read_syntax = false) const; |
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127 |
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128 void print_raw (ostream& os, bool pr_as_read_syntax = false) const; |
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129 |
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130 bool print_name_tag (ostream& os, const string& name) const; |
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131 |
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132 int type_id (void) const { return t_id; } |
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133 |
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134 string type_name (void) const { return t_name; } |
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135 |
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136 static int static_type_id (void) { return t_id; } |
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137 |
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138 static void register_type (void) |
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139 { t_id = octave_value_typeinfo::register_type (t_name); } |
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140 |
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141 private: |
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142 |
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143 // The value of this scalar. |
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144 double scalar; |
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145 |
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146 // For custom memory management. |
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147 static octave_allocator allocator; |
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148 |
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149 // Type id of scalar objects, set by register_type(). |
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150 static int t_id; |
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151 |
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152 // Type name of scalar objects, defined in ov-scalar.cc. |
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153 static const string t_name; |
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154 }; |
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155 |
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156 #endif |
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157 |
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158 /* |
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159 ;;; Local Variables: *** |
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160 ;;; mode: C++ *** |
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161 ;;; End: *** |
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162 */ |
