1 /* Construct a regular expression from a literal string.
2 Copyright (C) 1995, 2010 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2010.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* regex_quote converts a literal string to a regular expression that will
21 look for this literal string.
22 cflags can be 0 or REG_EXTENDED.
23 If it is 0, the result is a Basic Regular Expression (BRE)
24 <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03>.
25 If it is REG_EXTENDED, the result is an Extended Regular Expression (ERE)
26 <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04>.
27 The result is not anchored; if you want it to match only complete lines,
28 you need to add "^" at the beginning of the result and "$" at the end of the
32 /* Returns the number of bytes needed for the quoted string. */
33 extern size_t regex_quote_length (const char *string, int cflags);
35 /* Copies the quoted string to p and returns the incremented p.
36 There must be room for regex_quote_length (string, cflags) + 1 bytes at p.
38 extern char * regex_quote_copy (char *p, const char *string, int cflags);
40 /* Returns the freshly allocated quoted string. */
41 extern char * regex_quote (const char *string, int cflags);