update packages

[CreaPhase.git] / octave_packages / m / strings / rindex.m

diff --git a/octave_packages/m/strings/rindex.m b/octave_packages/m/strings/rindex.m
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+## Copyright (C) 1996-2012 Kurt Hornik
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} rindex (@var{s}, @var{t})
+## Return the position of the last occurrence of the character string
+## @var{t} in the character string @var{s}, or 0 if no occurrence is
+## found.  @var{s} may also be a string array or cell array of strings.
+##
+## For example:
+##
+## @example
+## @group
+## rindex ("Teststring", "t")
+##      @result{} 6
+## @end group
+## @end example
+##
+## The @code{rindex} function is equivalent to @code{index} with
+## @var{direction} set to @samp{"last"}.
+##
+## @seealso{find, index}
+## @end deftypefn
+
+## Author: Kurt Hornik <Kurt.Hornik@wu-wien.ac.at>
+## Adapted-By: jwe
+## This is patterned after the AWK function of the same name.
+
+function n = rindex (s, t)
+
+  if (nargin != 2)
+    print_usage ();
+  endif
+
+  n = index (s, t, "last");
+
+endfunction
+
+
+%!assert(rindex ("foobarbaz", "b") == 7 && rindex ("foobarbaz", "o") == 3);
+
+%!test
+%! str = char ("Hello", "World", "Goodbye", "World");
+%! assert (rindex (str, "o"), [5; 2; 3; 2]);
+%! str = cellstr (str);
+%! assert (rindex (str, "o"), [5; 2; 3; 2]);
+
+%% Test input validation
+%!error rindex ()
+%!error rindex ("foo")
+%!error rindex ("foo", "bar", "last")
+