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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 (__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 "lo-ieee.h" |
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32 #include "lo-utils.h" |
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33 |
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34 #include "gripes.h" |
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35 #include "ops.h" |
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36 #include "ov-range.h" |
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37 #include "ov-re-mat.h" |
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38 #include "ov-scalar.h" |
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39 #include "pr-output.h" |
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40 |
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41 int octave_range::t_id = -1; |
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42 |
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43 const string octave_range::t_name ("range"); |
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44 |
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45 static octave_value * |
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46 default_numeric_conversion_function (const octave_value& a) |
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47 { |
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48 CAST_CONV_ARG (const octave_range&); |
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49 |
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50 return new octave_matrix (v.matrix_value ()); |
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51 } |
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52 |
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53 type_conv_fcn |
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54 octave_range::numeric_conversion_function (void) const |
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55 { |
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56 return default_numeric_conversion_function; |
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57 } |
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58 |
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59 octave_value * |
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60 octave_range::try_narrowing_conversion (void) |
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61 { |
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62 octave_value *retval = 0; |
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63 |
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64 switch (range.nelem ()) |
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65 { |
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66 case 1: |
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67 retval = new octave_scalar (range.base ()); |
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68 break; |
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69 |
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70 case 0: |
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71 retval = new octave_matrix (Matrix ()); |
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72 break; |
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73 |
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74 default: |
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75 break; |
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76 } |
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77 |
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78 return retval; |
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79 } |
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80 |
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81 octave_value |
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82 octave_range::index (const octave_value_list& idx) const |
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83 { |
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84 // XXX FIXME XXX -- this doesn't solve the problem of |
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85 // |
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86 // a = 1:5; a(1, 1, 1) |
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87 // |
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88 // and similar constructions. Hmm... |
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89 |
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90 // XXX FIXME XXX -- using this constructor avoids possibly narrowing |
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91 // the range to a scalar value. Need a better solution to this |
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92 // problem. |
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93 |
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94 octave_value tmp (new octave_matrix (range.matrix_value ())); |
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95 |
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96 return tmp.index (idx); |
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97 } |
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98 |
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99 double |
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100 octave_range::double_value (bool) const |
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101 { |
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102 double retval = octave_NaN; |
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103 |
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104 int nel = range.nelem (); |
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105 |
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106 if (nel == 1 || (nel > 1 && Vdo_fortran_indexing)) |
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107 retval = range.base (); |
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108 else |
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109 gripe_invalid_conversion ("range", "real scalar"); |
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110 |
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111 return retval; |
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112 } |
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113 |
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114 octave_value |
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115 octave_range::all (void) const |
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116 { |
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117 // XXX FIXME XXX -- this is a potential waste of memory. |
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118 |
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119 Matrix m = range.matrix_value (); |
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120 |
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121 return m.all (); |
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122 } |
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123 |
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124 octave_value |
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125 octave_range::any (void) const |
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126 { |
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127 return (double) (range.base () != 0.0 || range.nelem () > 1); |
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128 } |
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129 |
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130 bool |
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131 octave_range::is_true (void) const |
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132 { |
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133 bool retval = false; |
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134 |
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135 if (range.nelem () == 0) |
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136 { |
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137 int flag = Vpropagate_empty_matrices; |
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138 |
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139 if (flag < 0) |
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140 warning ("empty range used in conditional expression"); |
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141 else if (flag == 0) |
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142 error ("empty range used in conditional expression"); |
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143 } |
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144 else |
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145 { |
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146 // XXX FIXME XXX -- this is a potential waste of memory. |
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147 |
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148 Matrix m ((range.matrix_value () . all ()) . all ()); |
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149 |
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150 retval = (m.rows () == 1 && m.columns () == 1 && m (0, 0) != 0.0); |
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151 } |
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152 |
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153 return retval; |
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154 } |
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155 |
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156 Complex |
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157 octave_range::complex_value (bool) const |
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158 { |
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159 Complex retval (octave_NaN, octave_NaN); |
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160 |
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161 int nel = range.nelem (); |
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162 |
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163 if (nel == 1 || (nel > 1 && Vdo_fortran_indexing)) |
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164 retval = range.base (); |
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165 else |
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166 gripe_invalid_conversion ("range", "complex scalar"); |
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167 |
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168 return retval; |
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169 } |
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170 |
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171 octave_value |
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172 octave_range::transpose (void) const |
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173 { |
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174 Matrix tmp (range.matrix_value ()); |
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175 return tmp.transpose (); |
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176 } |
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177 |
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178 octave_value |
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179 octave_range::hermitian (void) const |
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180 { |
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181 Matrix tmp (range.matrix_value ()); |
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182 return tmp.transpose (); |
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183 } |
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184 |
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185 octave_value |
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186 octave_range::convert_to_str (void) const |
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187 { |
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188 octave_value tmp (range.matrix_value ()); |
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189 return tmp.convert_to_str (); |
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190 } |
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191 |
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192 void |
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193 octave_range::print (ostream& os) |
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194 { |
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195 octave_print_internal (os, range, false, struct_indent); |
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196 } |
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197 |
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198 /* |
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199 ;;; Local Variables: *** |
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200 ;;; mode: C++ *** |
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201 ;;; End: *** |
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202 */ |
