1 ## Copyright (C) 2008-2012 Bill Denney
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {@var{validstr} =} validatestring (@var{str}, @var{strarray})
21 ## @deftypefnx {Function File} {@var{validstr} =} validatestring (@var{str}, @var{strarray}, @var{funcname})
22 ## @deftypefnx {Function File} {@var{validstr} =} validatestring (@var{str}, @var{strarray}, @var{funcname}, @var{varname})
23 ## @deftypefnx {Function File} {@var{validstr} =} validatestring (@dots{}, @var{position})
24 ## Verify that @var{str} is an element, or substring of an element, in
27 ## When @var{str} is a character string to be tested, and @var{strarray} is a
28 ## cellstr of valid values, then @var{validstr} will be the validated form
29 ## of @var{str} where validation is defined as @var{str} being a member
30 ## or substring of @var{validstr}. This is useful for both verifying
31 ## and expanding short options, such as "r", to their longer forms, such as
32 ## "red". If @var{str} is a substring of @var{validstr}, and there are
33 ## multiple matches, the shortest match will be returned if all matches are
34 ## substrings of each other. Otherwise, an error will be raised because the
35 ## expansion of @var{str} is ambiguous. All comparisons are case insensitive.
37 ## The additional inputs @var{funcname}, @var{varname}, and @var{position}
38 ## are optional and will make any generated validation error message more
42 ## @c Set example in small font to prevent overfull line
46 ## validatestring ("r", @{"red", "green", "blue"@})
49 ## validatestring ("b", @{"red", "green", "blue", "black"@})
50 ## @result{} error: validatestring: multiple unique matches were found for 'b':
55 ## @seealso{strcmp, strcmpi}
58 ## Author: Bill Denney <bill@denney.ws>
60 function str = validatestring (str, strarray, varargin)
62 if (nargin < 2 || nargin > 5)
67 ## Process input arguments
68 if (! isempty (varargin) && isnumeric (varargin{end}))
69 position = varargin{end};
73 funcname = varname = "";
74 char_idx = cellfun ("isclass", varargin, "char");
75 n_chararg = sum (char_idx);
77 error ("validatestring: invalid number of character inputs (3)");
78 elseif (n_chararg == 2)
79 [funcname, varname] = deal (varargin{char_idx});
80 elseif (n_chararg == 1)
81 funcname = varargin{char_idx};
86 error ("validatestring: STR must be a character string");
87 elseif (! isrow (str))
88 error ("validatestring: STR must be a single row vector");
89 elseif (! iscellstr (strarray))
90 error ("validatestring: STRARRAY must be a cellstr");
91 elseif (! isempty (funcname) && ! isrow (funcname))
92 error ("validatestring: FUNCNAME must be a single row vector");
93 elseif (! isempty (varname) && ! isrow (varname))
94 error ("validatestring: VARNAME must be a single row vector");
96 error ("validatestring: POSITION must be >= 0");
99 ## Make static part of error string that uses funcname, varname, and position
101 if (! isempty (funcname))
102 errstr = sprintf ("Function: %s ", funcname);
104 if (! isempty (varname))
105 errstr = sprintf ("%sVariable: %s ", errstr, varname);
108 errstr = sprintf ("%sArgument position %d ", errstr, position);
110 if (! isempty (errstr))
111 errstr(end:end+1) = ":\n";
114 matches = strncmpi (str, strarray(:), numel (str));
115 nmatches = sum (matches);
117 error ("validatestring: %s'%s' does not match any of\n%s", errstr, str,
118 sprintf ("%s, ", strarray{:})(1:end-2));
119 elseif (nmatches == 1)
120 str = strarray{matches};
122 ## Are the matches substrings of each other?
123 ## If true, choose the shortest. If not, raise an error.
124 match_idx = find (matches);
125 match_len = cellfun ("length", strarray(match_idx));
126 [min_len, min_idx] = min (match_len);
127 short_str = strarray{match_idx(min_idx)};
128 submatch = strncmpi (short_str, strarray(match_idx), min_len);
132 error ("validatestring: %smultiple unique matches were found for '%s':\n%s",
133 errstr, str, sprintf ("%s, ", strarray{match_idx})(1:end-2));
141 %! strarray = {"octave" "Oct" "octopus" "octaves"};
142 %!assert (validatestring ("octave", strarray), "octave")
143 %!assert (validatestring ("oct", strarray), "Oct")
144 %!assert (validatestring ("octa", strarray), "octave")
145 %! strarray = {"abc1" "def" "abc2"};
146 %!assert (validatestring ("d", strarray), "def")
147 %!error <'xyz' does not match any> validatestring ("xyz", strarray)
148 %!error <Function: DUMMY_TEST> validatestring ("xyz", strarray, "DUMMY_TEST")
149 %!error <Function: DUMMY_TEST Variable: DUMMY_VAR:> validatestring ("xyz", strarray, "DUMMY_TEST", "DUMMY_VAR")
150 %!error <Function: DUMMY_TEST Variable: DUMMY_VAR Argument position 5> validatestring ("xyz", strarray, "DUMMY_TEST", "DUMMY_VAR", 5)
151 %!error <multiple unique matches were found for 'abc'> validatestring ("abc", strarray)
153 %% Test input validation
154 %!error validatestring ("xyz")
155 %!error validatestring ("xyz", {"xyz"}, "3", "4", 5, 6)
156 %!error <invalid number of character inputs> validatestring ("xyz", {"xyz"}, "3", "4", "5")
157 %!error <STR must be a character string> validatestring (1, {"xyz"}, "3", "4", 5)
158 %!error <STR must be a single row vector> validatestring ("xyz".', {"xyz"}, "3", "4", 5)
159 %!error <STRARRAY must be a cellstr> validatestring ("xyz", "xyz", "3", "4", 5)
160 %!error <FUNCNAME must be a single row vector> validatestring ("xyz", {"xyz"}, "33".', "4", 5)
161 %!error <VARNAME must be a single row vector> validatestring ("xyz", {"xyz"}, "3", "44".', 5)
162 %!error <POSITION must be> validatestring ("xyz", {"xyz"}, "3", "4", -5)