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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 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cctype> |
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28 |
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29 #include "dMatrix.h" |
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30 |
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31 #include "defun.h" |
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32 #include "error.h" |
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33 #include "gripes.h" |
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34 #include "ov.h" |
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35 #include "oct-obj.h" |
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36 #include "unwind-prot.h" |
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37 #include "utils.h" |
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38 |
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39 DEFUN (char, args, , |
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40 "-*- texinfo -*-\n\ |
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41 @deftypefn {Built-in Function} {} char (@var{x})\n\ |
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42 @deftypefnx {Built-in Function} {} char (@var{cell_array})\n\ |
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43 @deftypefnx {Built-in Function} {} char (@var{s1}, @var{s2}, @dots{})\n\ |
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44 Create a string array from a numeric matrix, cell array, or list of\n\ |
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45 \n\ |
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46 If the argument is a numeric matrix, each element of the matrix is\n\ |
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47 converted to the corresponding ASCII character. For example,\n\ |
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48 \n\ |
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49 @example\n\ |
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50 @group\n\ |
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51 char ([97, 98, 99])\n\ |
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52 @result{} \"abc\"\n\ |
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53 @end group\n\ |
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54 @end example\n\ |
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55 \n\ |
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56 If the argument is a cell array of strings, the result is a string array\n\ |
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57 with each element corresponding to one element of the cell array.\n\ |
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58 \n\ |
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59 For multiple string arguments, the result is a string array with each\n\ |
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60 element corresponding to the arguments.\n\ |
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61 \n\ |
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62 The returned values are padded with blanks as needed to make each row\n\ |
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63 of the string array have the same length.\n\ |
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64 @end deftypefn") |
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65 { |
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66 octave_value retval; |
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67 |
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68 int nargin = args.length (); |
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69 |
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70 if (nargin == 1) |
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71 retval = args(0).convert_to_str (true, true, |
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72 args(0).is_dq_string () ? '"' : '\''); |
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73 else if (nargin > 1) |
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74 { |
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75 int n_elts = 0; |
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76 |
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77 int max_len = 0; |
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78 |
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79 for (int i = 0; i < nargin; i++) |
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80 { |
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81 string_vector s = args(i).all_strings (false, true); |
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82 |
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83 if (error_state) |
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84 { |
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85 error ("char: unable to convert some args to strings"); |
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86 return retval; |
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87 } |
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88 |
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89 n_elts += s.length (); |
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90 |
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91 int s_max_len = s.max_length (); |
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92 |
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93 if (s_max_len > max_len) |
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94 max_len = s_max_len; |
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95 } |
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96 |
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97 string_vector result (n_elts); |
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98 |
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99 int k = 0; |
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100 |
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101 for (int i = 0; i < nargin; i++) |
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102 { |
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103 string_vector s = args(i).all_strings (false, true); |
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104 |
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105 int n = s.length (); |
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106 |
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107 for (int j = 0; j < n; j++) |
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108 { |
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109 std::string t = s[j]; |
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110 int t_len = t.length (); |
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111 |
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112 if (max_len > t_len) |
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113 t += std::string (max_len - t_len, ' '); |
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114 |
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115 result[k++] = t; |
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116 } |
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117 } |
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118 |
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119 retval = octave_value (result, '\''); |
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120 } |
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121 else |
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122 print_usage ("char"); |
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123 |
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124 return retval; |
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125 } |
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126 |
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127 DEFUN (ischar, args, , |
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128 "-*- texinfo -*-\n\ |
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129 @deftypefn {Built-in Function} {} ischar (@var{a})\n\ |
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130 Return 1 if @var{a} is a string. Otherwise, return 0.\n\ |
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131 @end deftypefn") |
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132 { |
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133 octave_value retval; |
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134 |
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135 int nargin = args.length (); |
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136 |
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137 if (nargin == 1 && args(0).is_defined ()) |
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138 retval = args(0).is_string (); |
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139 else |
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140 print_usage ("ischar"); |
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141 |
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142 return retval; |
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143 } |
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144 |
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145 /* |
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146 ;;; Local Variables: *** |
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147 ;;; mode: C++ *** |
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148 ;;; End: *** |
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149 */ |
