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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cctype> |
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29 |
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30 #include "dMatrix.h" |
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31 |
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32 #include "defun.h" |
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33 #include "error.h" |
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34 #include "gripes.h" |
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35 #include "ov.h" |
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36 #include "oct-obj.h" |
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37 #include "unwind-prot.h" |
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38 #include "utils.h" |
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39 |
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40 DEFUN (char, args, , |
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41 "-*- texinfo -*-\n\ |
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42 @deftypefn {Built-in Function} {} char (@var{x})\n\ |
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43 @deftypefnx {Built-in Function} {} char (@var{cell_array})\n\ |
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44 @deftypefnx {Built-in Function} {} char (@var{s1}, @var{s2}, @dots{})\n\ |
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45 Create a string array from a numeric matrix, cell array, or list of\n\ |
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46 \n\ |
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47 If the argument is a numeric matrix, each element of the matrix is\n\ |
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48 converted to the corresponding ASCII character. For example,\n\ |
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49 \n\ |
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50 @example\n\ |
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51 @group\n\ |
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52 char ([97, 98, 99])\n\ |
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53 @result{} \"abc\"\n\ |
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54 @end group\n\ |
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55 @end example\n\ |
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56 \n\ |
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57 If the argument is a cell array of strings, the result is a string array\n\ |
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58 with each element corresponding to one element of the cell array.\n\ |
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59 \n\ |
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60 For multiple string arguments, the result is a string array with each\n\ |
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61 element corresponding to the arguments.\n\ |
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62 \n\ |
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63 The returned values are padded with blanks as needed to make each row\n\ |
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64 of the string array have the same length.\n\ |
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65 @end deftypefn") |
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66 { |
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67 octave_value retval; |
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68 |
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69 int nargin = args.length (); |
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70 |
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71 if (nargin == 1) |
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72 retval = args(0).convert_to_str (true, true, |
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73 args(0).is_dq_string () ? '"' : '\''); |
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74 else if (nargin > 1) |
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75 { |
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76 int n_elts = 0; |
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77 |
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78 int max_len = 0; |
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79 |
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80 for (int i = 0; i < nargin; i++) |
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81 { |
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82 string_vector s = args(i).all_strings (false, true); |
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83 |
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84 if (error_state) |
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85 { |
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86 error ("char: unable to convert some args to strings"); |
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87 return retval; |
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88 } |
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89 |
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90 n_elts += s.length (); |
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91 |
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92 int s_max_len = s.max_length (); |
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93 |
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94 if (s_max_len > max_len) |
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95 max_len = s_max_len; |
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96 } |
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97 |
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98 string_vector result (n_elts); |
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99 |
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100 int k = 0; |
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101 |
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102 for (int i = 0; i < nargin; i++) |
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103 { |
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104 string_vector s = args(i).all_strings (false, true); |
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105 |
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106 int n = s.length (); |
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107 |
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108 for (int j = 0; j < n; j++) |
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109 { |
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110 std::string t = s[j]; |
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111 int t_len = t.length (); |
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112 |
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113 if (max_len > t_len) |
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114 t += std::string (max_len - t_len, ' '); |
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115 |
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116 result[k++] = t; |
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117 } |
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118 } |
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119 |
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120 retval = octave_value (result, '\''); |
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121 } |
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122 else |
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123 print_usage ("char"); |
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124 |
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125 return retval; |
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126 } |
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127 |
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128 DEFUN (ischar, args, , |
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129 "-*- texinfo -*-\n\ |
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130 @deftypefn {Built-in Function} {} ischar (@var{a})\n\ |
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131 Return 1 if @var{a} is a string. Otherwise, return 0.\n\ |
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132 @end deftypefn") |
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133 { |
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134 octave_value retval; |
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135 |
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136 int nargin = args.length (); |
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137 |
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138 if (nargin == 1 && args(0).is_defined ()) |
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139 retval = args(0).is_string (); |
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140 else |
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141 print_usage ("ischar"); |
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142 |
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143 return retval; |
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144 } |
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145 |
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146 DEFUN (strcmp, args, , |
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147 "-*- texinfo -*-\n\ |
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148 @deftypefn {Function File} {} strcmp (@var{s1}, @var{s2})\n\ |
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149 Return 1 if the character strings @var{s1} and @var{s2} are the same,\n\ |
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150 and 0 otherwise.\n\ |
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151 @strong{Caution:} For compatibility with @sc{Matlab}, Octave's strcmp\n\ |
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152 function returns 1 if the strings are equal, and 0 otherwise. This is\n\ |
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153 just the opposite of the corresponding C library function.\n\ |
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154 @end deftypefn") |
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155 { |
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156 if (args.length () != 2) |
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157 { |
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158 usage ("strcmp (S, T)"); |
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159 return octave_value(); |
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160 } |
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161 |
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162 octave_value retval = false; |
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163 |
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164 bool s1_string = args(0).is_string (); |
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165 bool s1_cell = args(0).is_cell (); |
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166 bool s2_string = args(1).is_string (); |
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167 bool s2_cell = args(1).is_cell (); |
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168 |
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169 if (s1_string && s2_string) // must match exactly in all dimensions |
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170 { |
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171 const dim_vector dv1 = args(0).dims (); |
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172 const dim_vector dv2 = args(1).dims (); |
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173 |
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174 if (dv1.length () == dv2.length ()) |
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175 { |
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176 for (int i = 0; i < dv1.length (); i++) |
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177 if (dv1(i) != dv2(i)) |
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178 return retval; |
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179 |
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180 if (dv1(0) == 0) |
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181 retval = true; |
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182 else |
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183 { |
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184 charNDArray s1 = args(0).char_array_value (); |
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185 charNDArray s2 = args(1).char_array_value (); |
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186 |
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187 for (int i = 0; i < dv1.numel (); i++) |
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188 if (s1(i) != s2(i)) |
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189 return retval; |
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190 |
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191 retval = true; |
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192 } |
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193 } |
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194 } |
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195 else if ((s1_string && s2_cell) || (s1_cell && s2_string)) |
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196 { |
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197 string_vector str; |
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198 Cell cell; |
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199 int r; |
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200 |
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201 if (s1_string) |
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202 { |
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203 str = args(0).all_strings (); |
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204 r = args(0).rows (); |
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205 cell = args(1).cell_value (); |
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206 } |
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207 else |
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208 { |
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209 str = args(1).all_strings (); |
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210 r = args(1).rows (); |
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211 cell = args(0).cell_value (); |
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212 } |
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213 |
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214 if (r == 1) // broadcast the string |
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215 { |
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216 boolNDArray output (cell.dimensions); |
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217 |
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218 for (int i = 0; i < cell.length (); i++) |
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219 if (cell(i).is_string ()) |
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220 output(i) = (cell(i).string_value () == str[0]); |
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221 else |
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222 output(i) = false; |
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223 |
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224 retval = octave_value (output); |
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225 } |
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226 else if (r > 1) |
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227 { |
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228 if (cell.length () == 1) // broadcast the cell |
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229 { |
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230 const dim_vector& dv = dim_vector (r, 1); |
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231 boolNDArray output (dv); |
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232 |
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233 if (cell(0).is_string ()) |
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234 { |
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235 const string str2 = cell(0).string_value (); |
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236 |
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237 for (int i = 0; i < r; i++) |
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238 output(i) = (str[i] == str2); |
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239 } |
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240 else |
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241 { |
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242 for (int i = 0; i < r; i++) |
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243 output(i) = false; |
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244 } |
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245 |
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246 retval = octave_value (output); |
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247 } |
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248 else // must match in all dimensions |
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249 { |
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250 boolNDArray output (cell.dimensions); |
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251 |
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252 if (cell.length () == r) |
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253 { |
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254 for (int i = 0; i < r; i++) |
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255 if (cell(i).is_string ()) |
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256 output(i) = (str[i] == cell(i).string_value ()); |
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257 else |
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258 output(i) = false; |
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259 retval = octave_value (output); |
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260 } |
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261 } |
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262 } |
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263 } |
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264 else if (s1_cell && s2_cell) |
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265 { |
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266 Cell cell1; |
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267 Cell cell2; |
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268 |
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269 int r1 = args(0).numel (); |
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270 int r2; |
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271 |
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272 if (r1 == 1) // make the singleton cell2 |
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273 { |
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274 cell1 = args(1).cell_value (); |
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275 cell2 = args(0).cell_value (); |
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276 r1 = cell1.length (); |
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277 r2 = 1; |
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278 } |
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279 else |
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280 { |
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281 cell1 = args(0).cell_value (); |
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282 cell2 = args(1).cell_value (); |
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283 r2 = cell2.length (); |
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284 } |
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285 |
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286 const dim_vector size1 = cell1.dimensions; |
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287 const dim_vector size2 = cell2.dimensions; |
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288 |
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289 boolNDArray output (size1); |
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290 |
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291 if (r2 == 1) // broadcast cell2 |
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292 if (! cell2(0).is_string ()) |
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293 for (int i = 0; i < r1; i++) |
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294 output(i) = false; |
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295 else |
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296 { |
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297 const string str2 = cell2(0).string_value (); |
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298 |
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299 for (int i = 0; i < r1; i++) |
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300 if (cell1(i).is_string ()) |
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301 { |
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302 const string str1 = cell1(i).string_value (); |
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303 output(i) = (str1 == str2); |
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304 } |
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305 else |
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306 output(i) = false; |
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307 } |
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308 else |
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309 { |
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310 if (size1 != size2) |
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311 { |
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312 error ("strcmp: nonconformant cell arrays"); |
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313 return octave_value (); |
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314 } |
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315 |
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316 for (int i = 0; i < r1; i++) |
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317 if (cell1(i).is_string () && cell2(i).is_string ()) |
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318 { |
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319 const string str1 = cell1(i).string_value (); |
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320 const string str2 = cell2(i).string_value (); |
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321 output(i) = (str1 == str2); |
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322 } |
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323 else |
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324 output(i) = false; |
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325 } |
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326 |
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327 retval = octave_value (output); |
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328 } |
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329 |
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330 return retval; |
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331 } |
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332 |
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333 /* |
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334 ;;; Local Variables: *** |
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335 ;;; mode: C++ *** |
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336 ;;; End: *** |
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337 */ |
