Mercurial > octave
view scripts/strings/regexptranslate.m @ 31206:7ae0a0772e9d
maint: merge stable to default
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Sun, 28 Aug 2022 12:21:36 -0400 |
parents | 5d3faba0342e |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2008-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{str} =} regexptranslate (@var{op}, @var{s}) ## Translate a string for use in a regular expression. ## ## This may include either wildcard replacement or special character escaping. ## ## The behavior is controlled by @var{op} which can take the following ## values ## ## @table @asis ## @item @qcode{"wildcard"} ## The wildcard characters @code{.}, @code{*}, and @code{?} are replaced with ## wildcards that are appropriate for a regular expression. For example: ## ## @example ## @group ## regexptranslate ("wildcard", "*.m") ## @result{} '.*\.m' ## @end group ## @end example ## ## @item @qcode{"escape"} ## The characters @code{$.?[]}, that have special meaning for regular ## expressions are escaped so that they are treated literally. For example: ## ## @example ## @group ## regexptranslate ("escape", "12.5") ## @result{} '12\.5' ## @end group ## @end example ## ## @end table ## @seealso{regexp, regexpi, regexprep} ## @end deftypefn function str = regexptranslate (op, s) if (nargin != 2) print_usage (); endif if (! ischar (op)) error ("regexptranslate: operation OP must be a string"); endif op = tolower (op); if (strcmp ("wildcard", op)) str = strrep (strrep (strrep (s, '.', '\.'), '*', '.*'), '?', '.'); elseif (strcmp ("escape", op)) str = regexprep (s, '([][(){}.*+?^$|\\])', '\\$1'); else error ("regexptranslate: invalid operation OP"); endif endfunction %!assert (regexptranslate ("wildcard", "/a*b?c."), "/a.*b.c\\.") %!assert (regexptranslate ("escape", '^.?[abc]$'), '\^\.\?\[abc\]\$') ## Test input validation %!error <Invalid call to regexptranslate> regexptranslate () %!error <Invalid call to regexptranslate> regexptranslate ("wildcard") %!error <called with too many inputs> regexptranslate ("a", "b", "c") %!error <invalid operation> regexptranslate ("foo", "abc") %!error <operation OP must be a string> regexptranslate (10, "abc")