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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 "Cell.h" |
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33 #include "defun.h" |
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34 #include "error.h" |
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35 #include "gripes.h" |
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36 #include "ov.h" |
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37 #include "oct-obj.h" |
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38 #include "unwind-prot.h" |
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39 #include "utils.h" |
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40 |
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41 DEFUN (char, args, , |
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42 "-*- texinfo -*-\n\ |
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43 @deftypefn {Built-in Function} {} char (@var{x})\n\ |
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44 @deftypefnx {Built-in Function} {} char (@var{cell_array})\n\ |
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45 @deftypefnx {Built-in Function} {} char (@var{s1}, @var{s2}, @dots{})\n\ |
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46 Create a string array from a numeric matrix, cell array, or list of\n\ |
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47 \n\ |
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48 If the argument is a numeric matrix, each element of the matrix is\n\ |
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49 converted to the corresponding ASCII character. For example,\n\ |
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50 \n\ |
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51 @example\n\ |
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52 @group\n\ |
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53 char ([97, 98, 99])\n\ |
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54 @result{} \"abc\"\n\ |
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55 @end group\n\ |
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56 @end example\n\ |
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57 \n\ |
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58 If the argument is a cell array of strings, the result is a string array\n\ |
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59 with each element corresponding to one element of the cell array.\n\ |
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60 \n\ |
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61 For multiple string arguments, the result is a string array with each\n\ |
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62 element corresponding to the arguments.\n\ |
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63 \n\ |
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64 The returned values are padded with blanks as needed to make each row\n\ |
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65 of the string array have the same length.\n\ |
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66 @end deftypefn") |
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67 { |
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68 octave_value retval; |
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69 |
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70 int nargin = args.length (); |
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71 |
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72 if (nargin == 1) |
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73 retval = args(0).convert_to_str (true, true, |
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74 args(0).is_dq_string () ? '"' : '\''); |
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75 else if (nargin > 1) |
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76 { |
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77 int n_elts = 0; |
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78 |
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79 int max_len = 0; |
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80 |
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81 for (int i = 0; i < nargin; i++) |
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82 { |
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83 string_vector s = args(i).all_strings (false, true); |
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84 |
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85 if (error_state) |
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86 { |
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87 error ("char: unable to convert some args to strings"); |
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88 return retval; |
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89 } |
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90 |
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91 n_elts += s.length (); |
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92 |
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93 int s_max_len = s.max_length (); |
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94 |
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95 if (s_max_len > max_len) |
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96 max_len = s_max_len; |
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97 } |
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98 |
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99 string_vector result (n_elts); |
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100 |
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101 int k = 0; |
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102 |
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103 for (int i = 0; i < nargin; i++) |
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104 { |
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105 string_vector s = args(i).all_strings (false, true); |
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106 |
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107 int n = s.length (); |
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108 |
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109 for (int j = 0; j < n; j++) |
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110 { |
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111 std::string t = s[j]; |
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112 int t_len = t.length (); |
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113 |
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114 if (max_len > t_len) |
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115 t += std::string (max_len - t_len, ' '); |
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116 |
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117 result[k++] = t; |
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118 } |
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119 } |
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120 |
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121 retval = octave_value (result, '\''); |
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122 } |
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123 else |
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124 print_usage ("char"); |
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125 |
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126 return retval; |
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127 } |
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128 |
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129 DEFUN (ischar, args, , |
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130 "-*- texinfo -*-\n\ |
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131 @deftypefn {Built-in Function} {} ischar (@var{a})\n\ |
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132 Return 1 if @var{a} is a string. Otherwise, return 0.\n\ |
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133 @end deftypefn") |
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134 { |
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135 octave_value retval; |
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136 |
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137 int nargin = args.length (); |
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138 |
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139 if (nargin == 1 && args(0).is_defined ()) |
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140 retval = args(0).is_string (); |
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141 else |
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142 print_usage ("ischar"); |
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143 |
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144 return retval; |
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145 } |
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146 |
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147 DEFUN (strcmp, args, , |
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148 "-*- texinfo -*-\n\ |
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149 @deftypefn {Function File} {} strcmp (@var{s1}, @var{s2})\n\ |
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150 Return 1 if the character strings @var{s1} and @var{s2} are the same,\n\ |
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151 and 0 otherwise.\n\ |
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152 @strong{Caution:} For compatibility with @sc{Matlab}, Octave's strcmp\n\ |
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153 function returns 1 if the strings are equal, and 0 otherwise. This is\n\ |
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154 just the opposite of the corresponding C library function.\n\ |
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155 @end deftypefn") |
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156 { |
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157 octave_value retval; |
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158 |
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159 if (args.length () == 2) |
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160 { |
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161 bool s1_string = args(0).is_string (); |
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162 bool s1_cell = args(0).is_cell (); |
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163 bool s2_string = args(1).is_string (); |
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164 bool s2_cell = args(1).is_cell (); |
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165 |
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166 if (s1_string && s2_string) |
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167 { |
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168 // Must match exactly in all dimensions. |
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169 |
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170 const dim_vector dv1 = args(0).dims (); |
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171 const dim_vector dv2 = args(1).dims (); |
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172 |
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173 if (dv1.length () == dv2.length ()) |
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174 { |
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175 for (int i = 0; i < dv1.length (); i++) |
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176 { |
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177 if (dv1(i) != dv2(i)) |
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178 { |
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179 retval = false; |
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180 return retval; |
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181 } |
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182 } |
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183 |
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184 if (dv1(0) == 0) |
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185 retval = true; |
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186 else |
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187 { |
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188 charNDArray s1 = args(0).char_array_value (); |
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189 charNDArray s2 = args(1).char_array_value (); |
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190 |
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191 for (int i = 0; i < dv1.numel (); i++) |
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192 { |
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193 if (s1(i) != s2(i)) |
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194 { |
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195 retval = false; |
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196 return retval; |
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197 } |
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198 } |
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199 |
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200 retval = true; |
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201 } |
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202 } |
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203 } |
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204 else if ((s1_string && s2_cell) || (s1_cell && s2_string)) |
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205 { |
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206 string_vector str; |
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207 Cell cell; |
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208 int r; |
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209 |
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210 if (s1_string) |
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211 { |
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212 str = args(0).all_strings (); |
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213 r = args(0).rows (); |
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214 cell = args(1).cell_value (); |
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215 } |
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216 else |
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217 { |
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218 str = args(1).all_strings (); |
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219 r = args(1).rows (); |
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220 cell = args(0).cell_value (); |
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221 } |
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222 |
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223 if (r == 1) |
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224 { |
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225 // Broadcast the string. |
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226 |
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227 boolNDArray output (cell.dimensions); |
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228 |
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229 for (int i = 0; i < cell.length (); i++) |
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230 if (cell(i).is_string ()) |
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231 output(i) = (cell(i).string_value () == str[0]); |
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232 else |
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233 output(i) = false; |
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234 |
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235 retval = output; |
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236 } |
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237 else if (r > 1) |
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238 { |
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239 if (cell.length () == 1) |
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240 { |
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241 // Broadcast the cell. |
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242 |
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243 const dim_vector dv (r, 1); |
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244 boolNDArray output (dv); |
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245 |
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246 if (cell(0).is_string ()) |
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247 { |
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248 const std::string str2 = cell(0).string_value (); |
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249 |
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250 for (int i = 0; i < r; i++) |
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251 output(i) = (str[i] == str2); |
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252 } |
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253 else |
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254 { |
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255 for (int i = 0; i < r; i++) |
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256 output(i) = false; |
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257 } |
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258 |
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259 retval = output; |
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260 } |
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261 else |
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262 { |
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263 // Must match in all dimensions. |
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264 |
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265 boolNDArray output (cell.dimensions); |
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266 |
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267 if (cell.length () == r) |
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268 { |
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269 for (int i = 0; i < r; i++) |
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270 if (cell(i).is_string ()) |
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271 output(i) = (str[i] == cell(i).string_value ()); |
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272 else |
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273 output(i) = false; |
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274 |
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275 retval = output; |
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276 } |
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277 else |
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278 retval = false; |
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279 } |
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280 } |
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281 } |
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282 else if (s1_cell && s2_cell) |
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283 { |
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284 Cell cell1; |
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285 Cell cell2; |
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286 |
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287 int r1 = args(0).numel (); |
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288 int r2; |
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289 |
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290 if (r1 == 1) |
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291 { |
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292 // Make the singleton cell2. |
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293 |
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294 cell1 = args(1).cell_value (); |
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295 cell2 = args(0).cell_value (); |
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296 r1 = cell1.length (); |
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297 r2 = 1; |
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298 } |
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299 else |
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300 { |
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301 cell1 = args(0).cell_value (); |
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302 cell2 = args(1).cell_value (); |
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303 r2 = cell2.length (); |
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304 } |
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305 |
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306 const dim_vector size1 = cell1.dimensions; |
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307 const dim_vector size2 = cell2.dimensions; |
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308 |
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309 boolNDArray output (size1); |
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310 |
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311 if (r2 == 1) |
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312 { |
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313 // Broadcast cell2. |
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314 |
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315 if (! cell2(0).is_string ()) |
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316 { |
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317 for (int i = 0; i < r1; i++) |
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318 output(i) = false; |
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319 } |
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320 else |
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321 { |
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322 const std::string str2 = cell2(0).string_value (); |
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323 |
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324 for (int i = 0; i < r1; i++) |
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325 { |
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326 if (cell1(i).is_string ()) |
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327 { |
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328 const std::string str1 = cell1(i).string_value (); |
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329 output(i) = (str1 == str2); |
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330 } |
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331 else |
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332 output(i) = false; |
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333 } |
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334 } |
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335 } |
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336 else |
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337 { |
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338 if (size1 != size2) |
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339 { |
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340 error ("strcmp: nonconformant cell arrays"); |
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341 return retval; |
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342 } |
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343 |
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344 for (int i = 0; i < r1; i++) |
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345 { |
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346 if (cell1(i).is_string () && cell2(i).is_string ()) |
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347 { |
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348 const std::string str1 = cell1(i).string_value (); |
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349 const std::string str2 = cell2(i).string_value (); |
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350 output(i) = (str1 == str2); |
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351 } |
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352 else |
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353 output(i) = false; |
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354 } |
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355 } |
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356 |
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357 retval = output; |
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358 } |
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359 else |
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360 retval = false; |
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361 } |
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362 else |
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363 print_usage ("strcmp"); |
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364 |
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365 return retval; |
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366 } |
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367 |
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368 /* |
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369 ;;; Local Variables: *** |
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370 ;;; mode: C++ *** |
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371 ;;; End: *** |
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372 */ |
