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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_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 "oct-sym.h" |
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41 #include "str-vec.h" |
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42 |
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43 class Octave_map; |
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44 class octave_stream; |
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45 class octave_value_list; |
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46 |
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47 // Constants. |
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48 |
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49 // This just provides a way to avoid infinite recursion when building |
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50 // octave_value objects. |
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51 |
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52 class |
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53 octave_xvalue |
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54 { |
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55 public: |
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56 |
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57 octave_xvalue (void) { } |
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58 }; |
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59 |
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60 class octave_value; |
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61 |
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62 // XXX FIXME XXX -- these should probably really be inside the scope |
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63 // of the octave_value class, but the cygwin32 beta16 version of g++ |
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64 // can't handlt that. |
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65 |
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66 typedef octave_value (*binary_op_fcn) |
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67 (const octave_value&, const octave_value&); |
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68 |
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69 typedef octave_value (*assign_op_fcn) |
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70 (octave_value&, const octave_value_list&, const octave_value&); |
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71 |
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72 typedef octave_value * (*type_conv_fcn) (const octave_value&); |
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73 |
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74 class |
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75 octave_value : public octave_symbol |
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76 { |
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77 public: |
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78 |
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79 enum binary_op |
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80 { |
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81 add, |
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82 sub, |
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83 mul, |
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84 div, |
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85 pow, |
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86 ldiv, |
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87 lshift, |
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88 rshift, |
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89 lt, |
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90 le, |
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91 eq, |
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92 ge, |
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93 gt, |
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94 ne, |
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95 el_mul, |
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96 el_div, |
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97 el_pow, |
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98 el_ldiv, |
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99 el_and, |
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100 el_or, |
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101 struct_ref, |
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102 num_binary_ops, |
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103 unknown_binary_op |
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104 }; |
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105 |
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106 enum assign_op |
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107 { |
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108 asn_eq, |
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109 add_eq, |
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110 sub_eq, |
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111 mul_eq, |
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112 div_eq, |
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113 lshift_eq, |
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114 rshift_eq, |
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115 el_mul_eq, |
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116 el_div_eq, |
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117 el_and_eq, |
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118 el_or_eq, |
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119 num_assign_ops, |
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120 unknown_assign_op |
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121 }; |
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122 |
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123 static string binary_op_as_string (binary_op); |
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124 |
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125 static string assign_op_as_string (assign_op); |
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126 |
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127 enum magic_colon { magic_colon_t }; |
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128 enum all_va_args { all_va_args_t }; |
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129 |
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130 octave_value (void); |
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131 octave_value (double d); |
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132 octave_value (const Matrix& m); |
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133 octave_value (const DiagMatrix& d); |
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134 octave_value (const RowVector& v, int pcv = -1); |
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135 octave_value (const ColumnVector& v, int pcv = -1); |
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136 octave_value (const Complex& C); |
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137 octave_value (const ComplexMatrix& m); |
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138 octave_value (const ComplexDiagMatrix& d); |
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139 octave_value (const ComplexRowVector& v, int pcv = -1); |
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140 octave_value (const ComplexColumnVector& v, int pcv = -1); |
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141 octave_value (bool b); |
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142 octave_value (const boolMatrix& bm); |
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143 octave_value (const char *s); |
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144 octave_value (const string& s); |
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145 octave_value (const string_vector& s); |
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146 octave_value (const charMatrix& chm, bool is_string = false); |
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147 octave_value (double base, double limit, double inc); |
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148 octave_value (const Range& r); |
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149 octave_value (const Octave_map& m); |
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150 octave_value (octave_stream *s, int n); |
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151 octave_value (const octave_value_list& m); |
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152 octave_value (octave_value::magic_colon); |
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153 octave_value (octave_value::all_va_args); |
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154 |
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155 octave_value (octave_value *new_rep); |
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156 |
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157 // Copy constructor. |
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158 |
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159 octave_value (const octave_value& a) |
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160 { |
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161 rep = a.rep; |
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162 rep->count++; |
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163 } |
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164 |
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165 // Delete the representation of this constant if the count drops to |
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166 // zero. |
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167 |
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168 virtual ~octave_value (void); |
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169 |
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170 // This should only be called for derived types. |
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171 |
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172 virtual octave_value *clone (void); |
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173 |
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174 void make_unique (void) |
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175 { |
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176 if (rep->count > 1) |
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177 { |
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178 --rep->count; |
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179 rep = rep->clone (); |
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180 rep->count = 1; |
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181 } |
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182 } |
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183 |
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184 void *operator new (size_t size) |
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185 { return allocator.alloc (size); } |
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186 |
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187 void operator delete (void *p, size_t size) |
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188 { allocator.free (p, size); } |
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189 |
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190 // Simple assignment. |
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191 |
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192 octave_value& operator = (const octave_value& a) |
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193 { |
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194 if (rep != a.rep) |
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195 { |
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196 if (--rep->count == 0) |
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197 delete rep; |
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198 |
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199 rep = a.rep; |
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200 rep->count++; |
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201 } |
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202 |
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203 return *this; |
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204 } |
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205 |
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206 virtual type_conv_fcn numeric_conversion_function (void) const |
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207 { return rep->numeric_conversion_function (); } |
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208 |
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209 void maybe_mutate (void); |
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210 |
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211 virtual octave_value *try_narrowing_conversion (void) |
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212 { return rep->try_narrowing_conversion (); } |
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213 |
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214 virtual octave_value index (const octave_value_list& idx) const |
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215 { return rep->index (idx); } |
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216 |
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217 octave_value& assign (assign_op, const octave_value& rhs); |
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218 |
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219 octave_value& assign (assign_op, const octave_value_list& idx, |
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220 const octave_value& rhs); |
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221 |
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222 virtual idx_vector index_vector (void) const |
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223 { return rep->index_vector (); } |
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224 |
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225 virtual octave_value |
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226 struct_elt_val (const string& nm, bool silent = false) const |
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227 { return rep->struct_elt_val (nm, silent); } |
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228 |
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229 virtual octave_value& struct_elt_ref (const string& nm) |
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230 { return rep->struct_elt_ref (nm); } |
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231 |
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232 // Size. |
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233 |
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234 virtual int rows (void) const |
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235 { return rep->rows (); } |
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236 |
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237 virtual int columns (void) const |
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238 { return rep->columns (); } |
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239 |
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240 // Does this constant have a type? Both of these are provided since |
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241 // it is sometimes more natural to write is_undefined() instead of |
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242 // ! is_defined(). |
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243 |
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244 virtual bool is_defined (void) const |
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245 { return rep->is_defined (); } |
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246 |
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247 bool is_undefined (void) const |
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248 { return ! is_defined (); } |
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249 |
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250 virtual bool is_real_scalar (void) const |
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251 { return rep->is_real_scalar (); } |
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252 |
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253 virtual bool is_real_matrix (void) const |
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254 { return rep->is_real_matrix (); } |
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255 |
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256 virtual bool is_complex_scalar (void) const |
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257 { return rep->is_complex_scalar (); } |
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258 |
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259 virtual bool is_complex_matrix (void) const |
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260 { return rep->is_complex_matrix (); } |
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261 |
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262 virtual bool is_char_matrix (void) const |
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263 { return rep->is_char_matrix (); } |
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264 |
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265 virtual bool is_string (void) const |
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266 { return rep->is_string (); } |
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267 |
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268 virtual bool is_range (void) const |
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269 { return rep->is_range (); } |
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270 |
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271 virtual bool is_map (void) const |
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272 { return rep->is_map (); } |
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273 |
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274 virtual bool is_list (void) const |
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275 { return rep->is_list (); } |
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276 |
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277 virtual bool is_magic_colon (void) const |
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278 { return rep->is_magic_colon (); } |
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279 |
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280 virtual bool is_all_va_args (void) const |
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281 { return rep->is_all_va_args (); } |
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282 |
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283 // Are any or all of the elements in this constant nonzero? |
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284 |
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285 virtual octave_value all (void) const |
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286 { return rep->all (); } |
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287 |
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288 virtual octave_value any (void) const |
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289 { return rep->any (); } |
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290 |
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291 // Other type stuff. |
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292 |
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293 virtual bool is_real_type (void) const |
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294 { return rep->is_real_type (); } |
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295 |
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296 virtual bool is_complex_type (void) const |
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297 { return rep->is_complex_type (); } |
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298 |
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299 virtual bool is_scalar_type (void) const |
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300 { return rep->is_scalar_type (); } |
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301 |
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302 virtual bool is_matrix_type (void) const |
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303 { return rep->is_matrix_type (); } |
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304 |
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305 virtual bool is_numeric_type (void) const |
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306 { return rep->is_numeric_type (); } |
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307 |
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308 virtual bool valid_as_scalar_index (void) const |
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309 { return rep->valid_as_scalar_index (); } |
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310 |
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311 virtual bool valid_as_zero_index (void) const |
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312 { return rep->valid_as_zero_index (); } |
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313 |
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314 // Does this constant correspond to a truth value? |
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315 |
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316 virtual bool is_true (void) const |
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317 { return rep->is_true (); } |
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318 |
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319 // Is at least one of the dimensions of this constant zero? |
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320 |
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321 virtual bool is_empty (void) const |
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322 { return rep->is_empty (); } |
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323 |
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324 // Are the dimensions of this constant zero by zero? |
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325 |
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326 virtual bool is_zero_by_zero (void) const |
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327 { return rep->is_zero_by_zero (); } |
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328 |
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329 bool is_constant (void) const |
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330 { return true; } |
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331 |
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332 // Values. |
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333 |
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334 octave_value eval (void) { return *this; } |
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335 |
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336 octave_value_list eval (int, const octave_value_list& idx); |
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337 |
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338 virtual double double_value (bool frc_str_conv = false) const |
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339 { return rep->double_value (frc_str_conv); } |
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340 |
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341 virtual double scalar_value (bool frc_str_conv = false) const |
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342 { return rep->scalar_value (frc_str_conv); } |
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343 |
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344 virtual Matrix matrix_value (bool frc_str_conv = false) const |
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345 { return rep->matrix_value (frc_str_conv); } |
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346 |
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347 virtual Complex complex_value (bool frc_str_conv = false) const |
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348 { return rep->complex_value (frc_str_conv); } |
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349 |
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350 virtual ComplexMatrix complex_matrix_value (bool frc_str_conv = false) const |
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351 { return rep->complex_matrix_value (frc_str_conv); } |
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352 |
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353 virtual charMatrix char_matrix_value (bool frc_str_conv = false) const |
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354 { return rep->char_matrix_value (frc_str_conv); } |
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355 |
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356 virtual string_vector all_strings (void) const |
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357 { return rep->all_strings (); } |
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358 |
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359 virtual string string_value (void) const |
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360 { return rep->string_value (); } |
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361 |
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362 virtual Range range_value (void) const |
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363 { return rep->range_value (); } |
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364 |
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365 virtual Octave_map map_value (void) const; |
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366 |
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367 virtual octave_stream *stream_value (void) const; |
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368 |
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369 virtual int stream_number (void) const; |
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370 |
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371 virtual octave_value_list list_value (void) const; |
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372 |
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373 virtual bool bool_value (void) const |
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374 { return rep->bool_value (); } |
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375 |
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376 virtual boolMatrix bool_matrix_value (void) const |
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377 { return rep->bool_matrix_value (); } |
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378 |
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379 // Unary ops. |
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380 |
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381 virtual octave_value not (void) const { return rep->not (); } |
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382 |
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383 virtual octave_value uminus (void) const { return rep->uminus (); } |
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384 |
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385 virtual octave_value transpose (void) const { return rep->transpose (); } |
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386 |
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387 virtual octave_value hermitian (void) const { return rep->hermitian (); } |
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388 |
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389 virtual void increment (void) |
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390 { |
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391 make_unique (); |
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392 rep->increment (); |
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393 } |
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394 |
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395 virtual void decrement (void) |
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396 { |
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397 make_unique (); |
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398 rep->decrement (); |
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399 } |
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400 |
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401 ColumnVector vector_value (bool frc_str_conv = false, |
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402 bool frc_vec_conv = false) const; |
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403 |
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404 ComplexColumnVector |
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405 complex_vector_value (bool frc_str_conv = false, |
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406 bool frc_vec_conv = false) const; |
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407 |
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408 // Conversions. These should probably be private. If a user of this |
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409 // class wants a certain kind of constant, he should simply ask for |
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410 // it, and we should convert it if possible. |
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411 |
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412 virtual octave_value convert_to_str (void) const |
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413 { return rep->convert_to_str (); } |
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414 |
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415 virtual void convert_to_row_or_column_vector (void) |
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416 { rep->convert_to_row_or_column_vector (); } |
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417 |
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418 virtual void print (ostream& os, bool pr_as_read_syntax = false) const |
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419 { rep->print (os, pr_as_read_syntax); } |
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420 |
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421 virtual void print_raw (ostream& os, bool pr_as_read_syntax = false) const |
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422 { rep->print_raw (os, pr_as_read_syntax); } |
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423 |
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424 virtual bool print_name_tag (ostream& os, const string& name) const |
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425 { return rep->print_name_tag (os, name); } |
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426 |
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427 void print_with_name (ostream& os, const string& name, |
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428 bool print_padding = true) const; |
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429 |
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430 virtual int type_id (void) const { return rep->type_id (); } |
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431 |
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432 virtual string type_name (void) const { return rep->type_name (); } |
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433 |
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434 // Binary and unary operations. |
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435 |
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436 friend octave_value do_binary_op (octave_value::binary_op, |
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437 const octave_value&, |
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438 const octave_value&); |
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439 |
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440 protected: |
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441 |
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442 octave_value (const octave_xvalue&) : rep (0) { } |
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443 |
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444 void reset_indent_level (void) const |
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445 { curr_print_indent_level = 0; } |
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446 |
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447 void increment_indent_level (void) const |
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448 { curr_print_indent_level += 2; } |
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449 |
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450 void decrement_indent_level (void) const |
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451 { curr_print_indent_level -= 2; } |
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452 |
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453 int current_print_indent_level (void) const |
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454 { return curr_print_indent_level; } |
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455 |
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456 void newline (ostream& os) const; |
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457 |
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458 void indent (ostream& os) const; |
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459 |
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460 void reset (void) const; |
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461 |
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462 private: |
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463 |
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464 static octave_allocator allocator; |
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465 |
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466 union |
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467 { |
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468 octave_value *rep; // The real representation. |
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469 int count; // A reference count. |
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470 }; |
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471 |
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472 bool convert_and_assign (assign_op, const octave_value_list& idx, |
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473 const octave_value& rhs); |
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474 |
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2880
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475 bool try_assignment_with_conversion (assign_op, |
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476 const octave_value_list& idx, |
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2413
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477 const octave_value& rhs); |
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478 |
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2880
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479 bool try_assignment (assign_op, const octave_value_list& idx, |
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2413
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480 const octave_value& rhs); |
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2903
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481 |
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482 static int curr_print_indent_level; |
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483 static bool beginning_of_line; |
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2376
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484 }; |
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485 |
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486 // If TRUE, allow assignments like |
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487 // |
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488 // octave> A(1) = 3; A(2) = 5 |
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489 // |
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490 // for A already defined and a matrix type. |
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491 extern bool Vdo_fortran_indexing; |
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492 |
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493 // Should we allow things like: |
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494 // |
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495 // octave> 'abc' + 0 |
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496 // 97 98 99 |
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497 // |
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498 // to happen? A positive value means yes. A negative value means |
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499 // yes, but print a warning message. Zero means it should be |
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500 // considered an error. |
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501 extern int Vimplicit_str_to_num_ok; |
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502 |
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503 // Should we allow silent conversion of complex to real when a real |
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504 // type is what we're really looking for? A positive value means yes. |
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505 // A negative value means yes, but print a warning message. Zero |
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506 // means it should be considered an error. |
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507 extern int Vok_to_lose_imaginary_part; |
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508 |
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509 // If TRUE, create column vectors when doing assignments like: |
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510 // |
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511 // octave> A(1) = 3; A(2) = 5 |
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512 // |
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513 // (for A undefined). Only matters when resize_on_range_error is also |
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514 // TRUE. |
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515 extern bool Vprefer_column_vectors; |
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516 |
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517 // If TRUE, print the name along with the value. |
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518 extern bool Vprint_answer_id_name; |
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519 |
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520 // Should operations on empty matrices return empty matrices or an |
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521 // error? A positive value means yes. A negative value means yes, |
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522 // but print a warning message. Zero means it should be considered an |
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523 // error. |
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524 extern int Vpropagate_empty_matrices; |
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525 |
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526 // If TRUE, resize matrices when performing and indexed assignment and |
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527 // the indices are outside the current bounds. |
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528 extern bool Vresize_on_range_error; |
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529 |
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530 // How many levels of structure elements should we print? |
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531 extern int Vstruct_levels_to_print; |
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532 |
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533 // Allow divide by zero errors to be suppressed. |
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534 extern bool Vwarn_divide_by_zero; |
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535 |
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536 // Indentation level for structures. |
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537 extern int struct_indent; |
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538 |
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539 extern void increment_struct_indent (void); |
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540 extern void decrement_struct_indent (void); |
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541 |
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2880
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542 // Indentation level for lists. |
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543 extern int list_indent; |
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544 |
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545 extern void increment_list_indent (void); |
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546 extern void decrement_list_indent (void); |
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547 |
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2376
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548 extern void install_types (void); |
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549 |
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550 #endif |
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551 |
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552 /* |
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553 ;; Local Variables: *** |
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554 ;; mode: C++ *** |
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555 ;; End: *** |
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556 */ |
