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1 /* |
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2 |
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3 Copyright (C) 1996 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_value_h) |
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24 #define octave_value_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 "Range.h" |
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37 #include "idx-vector.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 "error.h" |
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43 #include "pt-exp.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 // Constants. |
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49 |
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50 // This just provides a way to avoid infinite recursion when building |
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51 // octave_value objects. |
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52 |
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53 class |
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54 octave_xvalue |
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55 { |
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56 public: |
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57 |
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58 octave_xvalue (void) { } |
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59 }; |
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60 |
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61 class octave_value; |
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62 |
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63 // XXX FIXME XXX -- these should probably really be inside the scope |
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64 // of the octave_value class, but the cygwin32 beta16 version of g++ |
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65 // can't handlt that. |
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66 |
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67 typedef octave_value (*binary_op_fcn) |
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68 (const octave_value&, const octave_value&); |
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69 |
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70 typedef octave_value (*assign_op_fcn) |
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71 (octave_value&, const octave_value_list&, const octave_value&); |
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72 |
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73 typedef octave_value * (*type_conv_fcn) (const octave_value&); |
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74 |
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75 class |
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76 octave_value |
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77 { |
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78 public: |
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79 |
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80 enum binary_op |
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81 { |
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82 add, |
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83 sub, |
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84 mul, |
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85 div, |
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86 pow, |
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87 ldiv, |
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88 lt, |
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89 le, |
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90 eq, |
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91 ge, |
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92 gt, |
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93 ne, |
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94 el_mul, |
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95 el_div, |
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96 el_pow, |
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97 el_ldiv, |
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98 el_and, |
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99 el_or, |
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100 struct_ref, |
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101 num_binary_ops, |
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102 unknown_binary_op |
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103 }; |
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104 |
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105 static string binary_op_as_string (binary_op); |
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106 |
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107 enum magic_colon { magic_colon_t }; |
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108 enum all_va_args { all_va_args_t }; |
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109 |
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110 octave_value (void); |
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111 octave_value (double d); |
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112 octave_value (const Matrix& m); |
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113 octave_value (const DiagMatrix& d); |
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114 octave_value (const RowVector& v, int pcv = -1); |
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115 octave_value (const ColumnVector& v, int pcv = -1); |
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116 octave_value (const Complex& C); |
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117 octave_value (const ComplexMatrix& m); |
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118 octave_value (const ComplexDiagMatrix& d); |
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119 octave_value (const ComplexRowVector& v, int pcv = -1); |
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120 octave_value (const ComplexColumnVector& v, int pcv = -1); |
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121 octave_value (bool b); |
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122 octave_value (const boolMatrix& bm); |
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123 octave_value (const char *s); |
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124 octave_value (const string& s); |
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125 octave_value (const string_vector& s); |
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126 octave_value (const charMatrix& chm, bool is_string = false); |
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127 octave_value (double base, double limit, double inc); |
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128 octave_value (const Range& r); |
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129 octave_value (const Octave_map& m); |
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130 octave_value (octave_value::magic_colon); |
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131 octave_value (octave_value::all_va_args); |
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132 |
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133 octave_value (octave_value *new_rep); |
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134 |
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135 // Copy constructor. |
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136 |
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137 octave_value (const octave_value& a) |
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138 { |
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139 rep = a.rep; |
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140 rep->count++; |
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141 } |
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142 |
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143 // Delete the representation of this constant if the count drops to |
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144 // zero. |
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145 |
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146 virtual ~octave_value (void); |
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147 |
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148 // This should only be called for derived types. |
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149 |
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150 virtual octave_value *clone (void) { panic_impossible (); } |
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151 |
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152 void make_unique (void) |
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153 { |
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154 if (rep->count > 1) |
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155 { |
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156 --rep->count; |
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157 rep = rep->clone (); |
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158 rep->count = 1; |
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159 } |
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160 } |
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161 |
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162 void *operator new (size_t size) |
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163 { return allocator.alloc (size); } |
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164 |
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165 void operator delete (void *p, size_t size) |
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166 { allocator.free (p, size); } |
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167 |
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168 // Simple assignment. |
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169 |
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170 octave_value& operator = (const octave_value& a) |
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171 { |
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172 if (rep != a.rep) |
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173 { |
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174 if (--rep->count == 0) |
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175 delete rep; |
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176 |
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177 rep = a.rep; |
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178 rep->count++; |
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179 } |
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180 |
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181 return *this; |
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182 } |
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183 |
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184 virtual type_conv_fcn numeric_conversion_function (void) const |
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185 { return rep->numeric_conversion_function (); } |
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186 |
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187 void maybe_mutate (void); |
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188 |
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189 virtual octave_value *try_narrowing_conversion (void) |
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190 { return rep->try_narrowing_conversion (); } |
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191 |
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192 virtual octave_value index (const octave_value_list& idx) const |
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193 { return rep->index (idx); } |
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194 |
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195 octave_value& assign (const octave_value_list& idx, const octave_value& rhs); |
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196 |
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197 virtual idx_vector index_vector (void) const |
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198 { return rep->index_vector (); } |
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199 |
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200 virtual octave_value |
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201 struct_elt_val (const string& nm, bool silent = false) const |
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202 { return rep->struct_elt_val (nm, silent); } |
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203 |
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204 virtual octave_value& struct_elt_ref (const string& nm) |
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205 { return rep->struct_elt_ref (nm); } |
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206 |
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207 // Size. |
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208 |
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209 virtual int rows (void) const |
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210 { return rep->rows (); } |
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211 |
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212 virtual int columns (void) const |
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213 { return rep->columns (); } |
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214 |
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215 // Does this constant have a type? Both of these are provided since |
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216 // it is sometimes more natural to write is_undefined() instead of |
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217 // ! is_defined(). |
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218 |
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219 virtual bool is_defined (void) const |
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220 { return rep->is_defined (); } |
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221 |
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222 bool is_undefined (void) const |
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223 { return ! is_defined (); } |
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224 |
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225 virtual bool is_real_scalar (void) const |
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226 { return rep->is_real_scalar (); } |
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227 |
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228 virtual bool is_real_matrix (void) const |
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229 { return rep->is_real_matrix (); } |
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230 |
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231 virtual bool is_complex_scalar (void) const |
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232 { return rep->is_complex_scalar (); } |
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233 |
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234 virtual bool is_complex_matrix (void) const |
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235 { return rep->is_complex_matrix (); } |
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236 |
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237 virtual bool is_char_matrix (void) const |
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238 { return rep->is_char_matrix (); } |
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239 |
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240 virtual bool is_string (void) const |
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241 { return rep->is_string (); } |
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242 |
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243 virtual bool is_range (void) const |
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244 { return rep->is_range (); } |
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245 |
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246 virtual bool is_map (void) const |
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247 { return rep->is_map (); } |
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248 |
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249 virtual bool is_magic_colon (void) const |
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250 { return rep->is_magic_colon (); } |
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251 |
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252 virtual bool is_all_va_args (void) const |
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253 { return rep->is_all_va_args (); } |
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254 |
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255 // Are any or all of the elements in this constant nonzero? |
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256 |
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257 virtual octave_value all (void) const |
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258 { return rep->all (); } |
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259 |
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260 virtual octave_value any (void) const |
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261 { return rep->any (); } |
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262 |
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263 // Other type stuff. |
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264 |
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265 virtual bool is_real_type (void) const |
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266 { return rep->is_real_type (); } |
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267 |
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268 virtual bool is_complex_type (void) const |
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269 { return rep->is_complex_type (); } |
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270 |
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271 virtual bool is_scalar_type (void) const |
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272 { return rep->is_scalar_type (); } |
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273 |
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274 virtual bool is_matrix_type (void) const |
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275 { return rep->is_matrix_type (); } |
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276 |
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277 virtual bool is_numeric_type (void) const |
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278 { return rep->is_numeric_type (); } |
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279 |
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280 virtual bool valid_as_scalar_index (void) const |
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281 { return rep->valid_as_scalar_index (); } |
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282 |
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283 virtual bool valid_as_zero_index (void) const |
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284 { return rep->valid_as_zero_index (); } |
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285 |
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286 // Does this constant correspond to a truth value? |
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287 |
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288 virtual bool is_true (void) const |
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289 { return rep->is_true (); } |
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290 |
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291 // Is at least one of the dimensions of this constant zero? |
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292 |
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293 virtual bool is_empty (void) const |
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294 { return rep->is_empty (); } |
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295 |
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296 // Are the dimensions of this constant zero by zero? |
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297 |
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298 virtual bool is_zero_by_zero (void) const |
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299 { return rep->is_zero_by_zero (); } |
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300 |
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301 // Values. |
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302 |
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303 virtual double double_value (bool frc_str_conv = false) const |
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304 { return rep->double_value (frc_str_conv); } |
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305 |
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306 virtual Matrix matrix_value (bool frc_str_conv = false) const |
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307 { return rep->matrix_value (frc_str_conv); } |
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308 |
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309 virtual Complex complex_value (bool frc_str_conv = false) const |
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310 { return rep->complex_value (frc_str_conv); } |
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311 |
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312 virtual ComplexMatrix complex_matrix_value (bool frc_str_conv = false) const |
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313 { return rep->complex_matrix_value (frc_str_conv); } |
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314 |
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315 virtual charMatrix char_matrix_value (bool frc_str_conv = false) const |
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316 { return rep->char_matrix_value (frc_str_conv); } |
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317 |
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318 virtual string_vector all_strings (void) const |
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319 { return rep->all_strings (); } |
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320 |
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321 virtual string string_value (void) const |
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322 { return rep->string_value (); } |
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323 |
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324 virtual Range range_value (void) const |
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325 { return rep->range_value (); } |
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326 |
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327 virtual Octave_map map_value (void) const; |
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328 |
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329 virtual bool bool_value (void) const |
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330 { return rep->bool_value (); } |
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331 |
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332 virtual boolMatrix bool_matrix_value (void) const |
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333 { return rep->bool_matrix_value (); } |
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334 |
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335 // Unary ops. |
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336 |
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337 virtual octave_value not (void) const { return rep->not (); } |
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338 |
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339 virtual octave_value uminus (void) const { return rep->uminus (); } |
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340 |
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341 virtual octave_value transpose (void) const { return rep->transpose (); } |
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342 |
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343 virtual octave_value hermitian (void) const { return rep->hermitian (); } |
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344 |
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345 virtual void increment (void) |
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346 { |
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347 make_unique (); |
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348 rep->increment (); |
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349 } |
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350 |
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351 virtual void decrement (void) |
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352 { |
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353 make_unique (); |
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354 rep->decrement (); |
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355 } |
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356 |
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357 ColumnVector vector_value (bool frc_str_conv = false, |
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358 bool frc_vec_conv = false) const; |
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359 |
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360 ComplexColumnVector |
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361 complex_vector_value (bool frc_str_conv = false, |
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362 bool frc_vec_conv = false) const; |
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363 |
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364 // Conversions. These should probably be private. If a user of this |
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365 // class wants a certain kind of constant, he should simply ask for |
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366 // it, and we should convert it if possible. |
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367 |
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368 virtual octave_value convert_to_str (void) const |
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369 { return rep->convert_to_str (); } |
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370 |
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371 virtual void convert_to_row_or_column_vector (void) |
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372 { rep->convert_to_row_or_column_vector (); } |
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373 |
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374 void print (bool pr_as_read_syntax = false); |
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375 |
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376 virtual void print (ostream& os, bool pr_as_read_syntax = false) |
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377 { rep->print (os, pr_as_read_syntax); } |
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378 |
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379 void print_with_name (const string& name, bool print_padding = true); |
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380 |
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381 void print_with_name (ostream& os, const string& name, |
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382 bool print_padding = true); |
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383 |
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384 virtual int type_id (void) const { return rep->type_id (); } |
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385 |
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386 virtual string type_name (void) const { return rep->type_name (); } |
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387 |
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388 // Binary and unary operations. |
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389 |
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390 friend octave_value do_binary_op (octave_value::binary_op, |
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391 const octave_value&, |
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392 const octave_value&); |
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393 |
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394 // Can we make these go away? |
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395 |
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396 bool print_as_scalar (void); |
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397 |
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398 protected: |
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399 |
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400 octave_value (const octave_xvalue&) : rep (0) { } |
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401 |
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402 private: |
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403 |
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404 static octave_allocator allocator; |
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405 |
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406 union |
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407 { |
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408 octave_value *rep; // The real representation. |
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409 int count; // A reference count. |
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410 }; |
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411 |
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412 bool convert_and_assign (const octave_value_list& idx, |
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413 const octave_value& rhs); |
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414 |
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415 bool try_assignment_with_conversion (const octave_value_list& idx, |
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416 const octave_value& rhs); |
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417 |
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418 bool try_assignment (const octave_value_list& idx, |
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419 const octave_value& rhs); |
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420 }; |
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421 |
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422 // If TRUE, allow assignments like |
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423 // |
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424 // octave> A(1) = 3; A(2) = 5 |
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425 // |
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426 // for A already defined and a matrix type. |
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427 extern bool Vdo_fortran_indexing; |
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428 |
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429 // Should we allow things like: |
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430 // |
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431 // octave> 'abc' + 0 |
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432 // 97 98 99 |
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433 // |
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434 // to happen? A positive value means yes. A negative value means |
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435 // yes, but print a warning message. Zero means it should be |
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436 // considered an error. |
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437 extern int Vimplicit_str_to_num_ok; |
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438 |
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439 // Should we allow silent conversion of complex to real when a real |
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440 // type is what we're really looking for? A positive value means yes. |
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441 // A negative value means yes, but print a warning message. Zero |
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442 // means it should be considered an error. |
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443 extern int Vok_to_lose_imaginary_part; |
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444 |
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445 // If TRUE, create column vectors when doing assignments like: |
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446 // |
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447 // octave> A(1) = 3; A(2) = 5 |
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448 // |
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449 // (for A undefined). Only matters when resize_on_range_error is also |
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450 // TRUE. |
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451 extern bool Vprefer_column_vectors; |
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452 |
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453 // If TRUE, print the name along with the value. |
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454 extern bool Vprint_answer_id_name; |
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455 |
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456 // Should operations on empty matrices return empty matrices or an |
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457 // error? A positive value means yes. A negative value means yes, |
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458 // but print a warning message. Zero means it should be considered an |
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459 // error. |
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460 extern int Vpropagate_empty_matrices; |
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461 |
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462 // If TRUE, resize matrices when performing and indexed assignment and |
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463 // the indices are outside the current bounds. |
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464 extern bool Vresize_on_range_error; |
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465 |
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466 // How many levels of structure elements should we print? |
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467 extern int Vstruct_levels_to_print; |
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468 |
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469 // Allow divide by zero errors to be suppressed. |
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470 extern bool Vwarn_divide_by_zero; |
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471 |
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472 // Indentation level for structures. |
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473 extern int struct_indent; |
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474 |
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475 extern void symbols_of_value (void); |
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476 |
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477 extern void increment_struct_indent (void); |
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478 extern void decrement_struct_indent (void); |
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479 |
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480 extern void install_types (void); |
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481 |
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482 #endif |
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483 |
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484 /* |
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485 ;; Local Variables: *** |
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486 ;; mode: C++ *** |
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487 ;; End: *** |
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488 */ |
