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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 /* |
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24 |
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25 The function string_vector::list_in_columns was adapted from a similar |
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26 function distributed in the GNU file utilities, copyright (C) 85, 88, |
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27 90, 91, 95, 1996 Free Software Foundation, Inc. |
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28 |
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29 */ |
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30 |
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31 #ifdef HAVE_CONFIG_H |
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32 #include <config.h> |
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33 #endif |
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34 |
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35 #include <iostream> |
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36 #include <string> |
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37 |
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38 #include "cmd-edit.h" |
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39 #include "lo-utils.h" |
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40 #include "str-vec.h" |
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41 |
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42 // Create a string vector from a NULL terminated list of C strings. |
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43 |
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44 string_vector::string_vector (const char * const *s) |
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45 : Array<std::string> () |
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46 { |
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47 int n = 0; |
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48 |
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49 const char * const *t = s; |
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50 |
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51 while (*t++) |
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52 n++; |
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53 |
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54 resize (n); |
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55 |
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56 for (int i = 0; i < n; i++) |
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57 elem (i) = s[i]; |
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58 } |
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59 |
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60 // Create a string vector from up to N C strings. Assumes that N is |
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61 // nonnegative. |
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62 |
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63 string_vector::string_vector (const char * const *s, int n) |
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64 : Array<std::string> (n) |
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65 { |
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66 for (int i = 0; i < n; i++) |
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67 elem (i) = s[i]; |
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68 } |
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69 |
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70 int |
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71 string_vector::compare (const void *a_arg, const void *b_arg) |
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72 { |
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73 const std::string *a = (const std::string *) a_arg; |
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74 const std::string *b = (const std::string *) b_arg; |
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75 |
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76 return a->compare (*b); |
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77 } |
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78 |
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79 string_vector& |
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80 string_vector::uniq (void) |
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81 { |
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82 int len = length (); |
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83 |
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84 if (len > 0) |
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85 { |
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86 int k = 0; |
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87 |
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88 for (int i = 1; i < len; i++) |
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89 if (elem(i) != elem(k)) |
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90 if (++k != i) |
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91 elem(k) = elem(i); |
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92 |
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93 if (len != ++k) |
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94 resize (k); |
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95 } |
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96 |
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97 return *this; |
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98 } |
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99 |
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100 char ** |
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101 string_vector::c_str_vec (void) const |
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102 { |
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103 int len = length (); |
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104 |
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105 char **retval = new char * [len + 1]; |
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106 |
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107 retval [len] = 0; |
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108 |
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109 for (int i = 0; i < len; i++) |
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110 retval[i] = strsave (elem(i).c_str ()); |
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111 |
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112 return retval; |
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113 } |
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114 |
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115 void |
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116 string_vector::delete_c_str_vec (const char * const *v) |
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117 { |
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118 while (*v) |
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119 delete [] *v; |
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120 |
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121 delete [] v; |
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122 } |
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123 |
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124 // Format a list in neat columns. |
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125 |
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126 std::ostream& |
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127 string_vector::list_in_columns (std::ostream& os) const |
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128 { |
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129 // Compute the maximum name length. |
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130 |
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131 int max_name_length = 0; |
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132 int total_names = length (); |
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133 |
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134 for (int i = 0; i < total_names; i++) |
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135 { |
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136 int name_length = elem (i).length (); |
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137 if (name_length > max_name_length) |
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138 max_name_length = name_length; |
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139 } |
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140 |
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141 // Allow at least two spaces between names. |
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142 |
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143 max_name_length += 2; |
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144 |
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145 // Calculate the maximum number of columns that will fit. |
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146 |
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147 int line_length = command_editor::terminal_cols (); |
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148 int cols = line_length / max_name_length; |
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149 if (cols == 0) |
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150 cols = 1; |
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151 |
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152 // Calculate the number of rows that will be in each column except |
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153 // possibly for a short column on the right. |
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154 |
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155 int rows = total_names / cols + (total_names % cols != 0); |
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156 |
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157 // Recalculate columns based on rows. |
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158 |
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159 cols = total_names / rows + (total_names % rows != 0); |
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160 |
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161 int count; |
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162 for (int row = 0; row < rows; row++) |
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163 { |
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164 count = row; |
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165 int pos = 0; |
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166 |
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167 // Print the next row. |
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168 |
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169 while (1) |
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170 { |
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171 std::string nm = elem (count); |
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172 |
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173 os << nm; |
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174 int name_length = nm.length (); |
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175 |
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176 count += rows; |
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177 if (count >= total_names) |
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178 break; |
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179 |
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180 int spaces_to_pad = max_name_length - name_length; |
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181 for (int i = 0; i < spaces_to_pad; i++) |
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182 os << " "; |
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183 pos += max_name_length; |
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184 } |
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185 os << "\n"; |
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186 } |
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187 |
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188 return os; |
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189 } |
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190 |
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191 /* |
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192 ;;; Local Variables: *** |
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193 ;;; mode: C++ *** |
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194 ;;; End: *** |
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195 */ |
