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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 (__GNUG__) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <iostream.h> |
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32 |
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33 #include "lo-ieee.h" |
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34 |
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35 #include "oct-obj.h" |
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36 #include "ops.h" |
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37 #include "ov-complex.h" |
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38 #include "ov-cx-mat.h" |
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39 #include "ov-scalar.h" |
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40 #include "gripes.h" |
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41 #include "pr-output.h" |
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42 |
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43 DEFINE_OCTAVE_ALLOCATOR (octave_complex); |
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44 |
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45 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_complex, "complex scalar"); |
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46 |
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47 octave_value * |
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48 octave_complex::try_narrowing_conversion (void) |
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49 { |
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50 octave_value *retval = 0; |
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51 |
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52 if (imag (scalar) == 0.0) |
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53 retval = new octave_scalar (::real (scalar)); |
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54 |
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55 return retval; |
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56 } |
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57 |
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58 static inline bool |
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59 valid_scalar_indices (const octave_value_list& args) |
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60 { |
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61 int nargin = args.length (); |
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62 |
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63 for (int i = 0; i < nargin; i++) |
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64 if (! args(i).valid_as_scalar_index ()) |
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65 return false; |
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66 |
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67 return true; |
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68 } |
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69 |
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70 octave_value |
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71 octave_complex::do_index_op (const octave_value_list& idx) |
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72 { |
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73 octave_value retval; |
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74 |
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75 if (valid_scalar_indices (idx)) |
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76 retval = scalar; |
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77 else |
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78 { |
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79 // XXX FIXME XXX -- this doesn't solve the problem of |
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80 // |
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81 // a = i; a([1,1], [1,1], [1,1]) |
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82 // |
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83 // and similar constructions. Hmm... |
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84 |
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85 // XXX FIXME XXX -- using this constructor avoids narrowing the |
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86 // 1x1 matrix back to a scalar value. Need a better solution |
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87 // to this problem. |
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88 |
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89 octave_value tmp (new octave_complex_matrix (complex_matrix_value ())); |
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90 |
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91 retval = tmp.do_index_op (idx); |
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92 } |
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93 |
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94 return retval; |
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95 } |
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96 |
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97 double |
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98 octave_complex::double_value (bool force_conversion) const |
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99 { |
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100 double retval = octave_NaN; |
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101 |
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102 int flag = force_conversion; |
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103 |
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104 if (! flag) |
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105 flag = Vok_to_lose_imaginary_part; |
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106 |
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107 if (flag < 0) |
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108 gripe_implicit_conversion ("complex scalar", "real scalar"); |
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109 |
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110 if (flag) |
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111 retval = ::real (scalar); |
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112 else |
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113 gripe_invalid_conversion ("complex scalar", "real scalar"); |
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114 |
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115 return retval; |
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116 } |
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117 |
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118 Matrix |
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119 octave_complex::matrix_value (bool force_conversion) const |
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120 { |
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121 Matrix retval; |
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122 |
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123 int flag = force_conversion; |
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124 |
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125 if (! flag) |
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126 flag = Vok_to_lose_imaginary_part; |
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127 |
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128 if (flag < 0) |
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129 gripe_implicit_conversion ("complex scalar", "real matrix"); |
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130 |
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131 if (flag) |
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132 retval = Matrix (1, 1, ::real (scalar)); |
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133 else |
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134 gripe_invalid_conversion ("complex scalar", "real matrix"); |
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135 |
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136 return retval; |
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137 } |
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138 |
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139 Complex |
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140 octave_complex::complex_value (bool) const |
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141 { |
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142 return scalar; |
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143 } |
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144 |
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145 |
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146 ComplexMatrix |
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147 octave_complex::complex_matrix_value (bool) const |
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148 { |
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149 return ComplexMatrix (1, 1, scalar); |
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150 } |
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151 |
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152 void |
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153 octave_complex::print (ostream& os, bool pr_as_read_syntax) const |
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154 { |
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155 print_raw (os, pr_as_read_syntax); |
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156 newline (os); |
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157 } |
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158 |
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159 void |
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160 octave_complex::print_raw (ostream& os, bool pr_as_read_syntax) const |
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161 { |
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162 indent (os); |
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163 octave_print_internal (os, scalar, pr_as_read_syntax); |
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164 } |
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165 |
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166 bool |
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167 octave_complex::print_name_tag (ostream& os, const string& name) const |
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168 { |
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169 indent (os); |
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170 os << name << " = "; |
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171 return false; |
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172 } |
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173 |
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174 /* |
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175 ;;; Local Variables: *** |
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176 ;;; mode: C++ *** |
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177 ;;; End: *** |
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178 */ |
