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1 // user-prefs.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef __GNUG__ |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #include <string.h> |
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29 |
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30 #include "user-prefs.h" |
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31 #include "error.h" |
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32 #include "variables.h" |
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33 #include "utils.h" |
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34 |
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35 // The list of user preferences. Values change when global variables |
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36 // change, so we don\'t have to do a variable look up every time we |
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37 // need to check a preference. |
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38 user_preferences user_pref; |
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39 |
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40 /* |
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41 * Check the value of a string variable to see if it it\'s ok to do |
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42 * something. |
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43 * |
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44 * return of -1 => ok, but give me warning (default). |
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45 * return of 0 => always ok. |
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46 * return of 1 => never ok. |
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47 */ |
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48 static int |
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49 check_str_pref (char *var) |
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50 { |
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51 char *val = octave_string_variable (var); |
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52 int pref = -1; |
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53 if (val != (char *) NULL) |
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54 { |
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55 if (strncmp (val, "yes", 3) == 0 |
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56 || strncmp (val, "true", 4) == 0) |
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57 pref = 1; |
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58 else if (strncmp (val, "never", 5) == 0 |
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59 || strncmp (val, "no", 2) == 0 |
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60 || strncmp (val, "false", 5) == 0) |
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61 pref = 0; |
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62 } |
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63 return pref; |
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64 } |
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65 |
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66 /* |
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67 * Should we allow assignments like: |
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68 * |
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69 * octave> A(1) = 3; A(2) = 5 |
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70 * |
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71 * for A already defined and a matrix type? |
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72 */ |
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73 int |
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74 do_fortran_indexing (void) |
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75 { |
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76 user_pref.do_fortran_indexing = |
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77 check_str_pref ("do_fortran_indexing"); |
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78 |
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79 return 0; |
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80 } |
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81 |
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82 /* |
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83 * Should ignore empty elements in a matrix list (i.e., is an |
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84 * expression like `[[], 1]' ok? |
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85 */ |
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86 int |
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87 empty_list_elements_ok (void) |
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88 { |
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89 user_pref.empty_list_elements_ok = |
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90 check_str_pref ("empty_list_elements_ok"); |
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91 |
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92 return 0; |
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93 } |
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94 |
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95 /* |
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96 * Should we allow things like: |
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97 * |
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98 * octave> 'abc' + 0 |
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99 * 97 98 99 |
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100 * |
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101 * to happen? |
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102 */ |
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103 int |
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104 implicit_str_to_num_ok (void) |
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105 { |
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106 user_pref.implicit_str_to_num_ok = |
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107 check_str_pref ("implicit_str_to_num_ok"); |
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108 |
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109 return 0; |
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110 } |
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111 |
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112 /* |
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113 * Should we allow silent conversion of complex to real when a real |
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114 * type is what we\'re really looking for? |
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115 */ |
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116 int |
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117 ok_to_lose_imaginary_part (void) |
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118 { |
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119 user_pref.ok_to_lose_imaginary_part = |
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120 check_str_pref ("ok_to_lose_imaginary_part"); |
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121 |
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122 return 0; |
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123 } |
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124 |
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125 /* |
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126 * When doing assignments like: |
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127 * |
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128 * octave> A(1) = 3; A(2) = 5 |
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129 * |
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130 * (for A undefined) should we build column vectors? Returning true |
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131 * only matters when resize_on_range_error is also true. |
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132 */ |
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133 int |
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134 prefer_column_vectors (void) |
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135 { |
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136 user_pref.prefer_column_vectors = |
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137 check_str_pref ("prefer_column_vectors"); |
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138 |
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139 return 0; |
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140 } |
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141 |
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142 /* |
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143 * For things like |
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144 * |
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145 * a = [2,3]; a([1,1]) |
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146 * |
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147 * return [2 3] instead of [2 2]. |
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148 */ |
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149 int |
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150 prefer_zero_one_indexing (void) |
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151 { |
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152 user_pref.prefer_zero_one_indexing = |
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153 check_str_pref ("prefer_zero_one_indexing"); |
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154 |
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155 return 0; |
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156 } |
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157 |
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158 /* |
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159 * Should we print things like |
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160 * |
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161 * octave> a = [1,2;3,4] |
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162 * a = |
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163 * |
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164 * 1 2 |
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165 * 3 4 |
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166 */ |
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167 int |
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168 print_answer_id_name (void) |
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169 { |
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170 user_pref.print_answer_id_name = |
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171 check_str_pref ("print_answer_id_name"); |
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172 |
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173 return 0; |
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174 } |
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175 |
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176 /* |
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177 * Should operations on empty matrices return empty matrices or an |
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178 * error? |
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179 */ |
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180 int |
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181 propagate_empty_matrices (void) |
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182 { |
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183 user_pref.propagate_empty_matrices = |
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184 check_str_pref ("propagate_empty_matrices"); |
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185 |
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186 return 0; |
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187 } |
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188 |
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189 /* |
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190 * Should we also print the dimensions of empty matrices? |
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191 */ |
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192 int |
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193 print_empty_dimensions (void) |
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194 { |
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195 user_pref.print_empty_dimensions = |
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196 check_str_pref ("print_empty_dimensions"); |
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197 |
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198 return 0; |
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199 } |
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200 |
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201 /* |
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202 * When doing assignments, should we resize matrices if the indices |
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203 * are outside the current bounds? |
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204 */ |
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205 int |
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206 resize_on_range_error (void) |
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207 { |
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208 user_pref.resize_on_range_error = |
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209 check_str_pref ("resize_on_range_error"); |
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210 |
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211 return 0; |
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212 } |
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213 |
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214 /* |
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215 * If a function does not return any values explicitly, return the |
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216 * last computed value. |
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217 */ |
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218 int |
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219 return_last_computed_value (void) |
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220 { |
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221 user_pref.return_last_computed_value = |
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222 check_str_pref ("return_last_computed_value"); |
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223 |
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224 return 0; |
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225 } |
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226 |
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227 /* |
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228 * Suppress printing results in called functions. |
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229 */ |
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230 int |
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231 silent_functions (void) |
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232 { |
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233 user_pref.silent_functions = |
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234 check_str_pref ("silent_functions"); |
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235 |
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236 return 0; |
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237 } |
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238 |
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239 /* |
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240 * Should should big matrices be split into smaller slices for output? |
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241 */ |
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242 int |
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243 split_long_rows (void) |
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244 { |
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245 user_pref.split_long_rows = check_str_pref ("split_long_rows"); |
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246 |
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247 return 0; |
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248 } |
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249 |
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250 /* |
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251 * Should things like: |
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252 * |
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253 * octave> ones (-1, 5) |
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254 * |
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255 * result in an empty matrix or an error? |
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256 */ |
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257 int |
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258 treat_neg_dim_as_zero (void) |
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259 { |
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260 user_pref.treat_neg_dim_as_zero = |
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261 check_str_pref ("treat_neg_dim_as_zero"); |
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262 |
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263 return 0; |
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264 } |
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265 |
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266 /* |
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267 * Generate a warning for the comma in things like |
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268 * |
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269 * octave> global a, b = 2 |
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270 */ |
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271 int |
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272 warn_comma_in_global_decl (void) |
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273 { |
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274 user_pref.warn_comma_in_global_decl = |
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275 check_str_pref ("warn_comma_in_global_decl"); |
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276 |
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277 return 0; |
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278 } |
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279 |
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280 /* |
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281 * On IEEE machines, allow divide by zero errors to be suppressed. |
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282 */ |
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283 int |
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284 warn_divide_by_zero (void) |
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285 { |
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286 user_pref.warn_divide_by_zero = check_str_pref ("warn_divide_by_zero"); |
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287 |
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288 return 0; |
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289 } |
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290 |
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291 /* |
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292 * Generate a warning for the assignment in things like |
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293 * |
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294 * octave> if (a = 2 < n) |
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295 * |
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296 * but not |
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297 * |
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298 * octave> if ((a = 2) < n) |
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299 */ |
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300 int |
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301 warn_assign_as_truth_value (void) |
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302 { |
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303 user_pref.warn_assign_as_truth_value = |
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304 check_str_pref ("user_pref.warn_assign_as_truth_value"); |
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305 |
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306 return 0; |
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307 } |
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308 |
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309 /* |
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310 * If possible, send all output intended for the screen through the |
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311 * pager. |
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312 */ |
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313 int |
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314 page_screen_output (void) |
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315 { |
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316 user_pref.page_screen_output = check_str_pref ("page_screen_output"); |
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317 |
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318 return 0; |
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319 } |
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320 |
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321 int |
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322 set_output_max_field_width (void) |
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323 { |
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324 int status = 0; |
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325 |
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326 static int kludge = 0; |
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327 |
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328 double val; |
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329 if (octave_real_scalar_variable ("output_max_field_width", val) == 0) |
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330 { |
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331 int ival = NINT (val); |
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332 if (ival > 0 && (double) ival == val) |
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333 { |
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334 user_pref.output_max_field_width= ival; |
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335 return status; |
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336 } |
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337 } |
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338 |
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339 if (kludge == 0) |
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340 kludge++; |
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341 else |
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342 { |
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343 warning ("invalid value specified for output_max_field_width"); |
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344 status = -1; |
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345 } |
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346 |
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347 return status; |
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348 } |
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349 |
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350 int |
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351 set_output_precision (void) |
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352 { |
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353 int status = 0; |
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354 |
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355 static int kludge = 0; |
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356 |
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357 double val; |
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358 if (octave_real_scalar_variable ("output_precision", val) == 0) |
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359 { |
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360 int ival = NINT (val); |
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361 if (ival >= 0 && (double) ival == val) |
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362 { |
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363 user_pref.output_precision = ival; |
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364 return status; |
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365 } |
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366 } |
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367 |
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368 if (kludge == 0) |
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369 kludge++; |
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370 else |
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371 { |
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372 warning ("invalid value specified for output_precision"); |
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373 status = -1; |
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374 } |
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375 |
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376 return status; |
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377 } |
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378 |
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379 int |
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380 sv_loadpath (void) |
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381 { |
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382 int status = 0; |
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383 |
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384 char *s = octave_string_variable ("LOADPATH"); |
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385 if (s != (char *) NULL) |
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386 { |
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387 delete [] user_pref.loadpath; |
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388 user_pref.loadpath = s; |
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389 } |
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390 else |
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391 { |
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392 warning ("invalid value specified for LOADPATH"); |
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393 status = -1; |
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394 } |
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395 |
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396 return status; |
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397 } |
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398 |
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399 int |
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400 sv_ps1 (void) |
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401 { |
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402 int status = 0; |
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403 |
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404 char *s = octave_string_variable ("PS1"); |
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405 if (s != (char *) NULL) |
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406 { |
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407 delete [] user_pref.ps1; |
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408 user_pref.ps1 = s; |
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409 } |
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410 else |
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411 { |
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412 warning ("invalid value specified for PS1"); |
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413 status = -1; |
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414 } |
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415 |
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416 return status; |
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417 } |
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418 |
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419 int |
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420 sv_ps2 (void) |
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421 { |
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422 int status = 0; |
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423 |
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424 char *s = octave_string_variable ("PS2"); |
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425 if (s != (char *) NULL) |
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426 { |
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427 delete [] user_pref.ps2; |
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428 user_pref.ps2 = s; |
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429 } |
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430 else |
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431 { |
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432 warning ("invalid value specified for PS2"); |
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433 status = -1; |
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434 } |
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435 |
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436 return status; |
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437 } |
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438 |
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439 int |
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440 sv_pwd (void) |
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441 { |
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442 int status = 0; |
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443 |
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444 char *s = octave_string_variable ("PWD"); |
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445 if (s != (char *) NULL) |
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446 { |
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447 delete [] user_pref.pwd; |
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448 user_pref.pwd = s; |
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449 } |
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450 else |
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451 { |
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452 warning ("invalid value specified for PWD"); |
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453 status = -1; |
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454 } |
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455 |
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456 return status; |
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457 } |
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458 |
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459 int |
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460 sv_gnuplot_binary (void) |
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461 { |
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462 int status = 0; |
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463 |
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464 char *s = octave_string_variable ("gnuplot_binary"); |
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465 if (s != (char *) NULL) |
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466 { |
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467 delete [] user_pref.gnuplot_binary; |
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468 user_pref.gnuplot_binary = s; |
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469 } |
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470 else |
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471 { |
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472 warning ("invalid value specified for gnuplot_binary"); |
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473 status = -1; |
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474 } |
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475 |
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476 return status; |
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477 } |
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478 |
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479 int |
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480 sv_pager_binary (void) |
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481 { |
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482 int status = 0; |
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483 |
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484 char *s = octave_string_variable ("PAGER"); |
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485 if (s != (char *) NULL) |
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486 { |
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487 delete [] user_pref.pager_binary; |
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488 user_pref.pager_binary = s; |
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489 } |
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490 else |
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491 { |
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492 warning ("invalid value specified for PAGER"); |
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493 status = -1; |
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494 } |
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495 |
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496 return status; |
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497 } |
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498 |
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499 /* |
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500 ;;; Local Variables: *** |
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501 ;;; mode: C++ *** |
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502 ;;; page-delimiter: "^/\\*" *** |
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503 ;;; End: *** |
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504 */ |
