From 2d4d6787c4bc62042be4a58a4791074ab2c6a89e Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Fri, 4 Feb 2022 11:23:27 -0500 Subject: regex: Add support for emacs and grep types --- regex.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 regex.c (limited to 'regex.c') diff --git a/regex.c b/regex.c new file mode 100644 index 0000000..f8bd833 --- /dev/null +++ b/regex.c @@ -0,0 +1,62 @@ +/**************************************************************************** + * bfs * + * Copyright (C) 2022 Tavian Barnes * + * * + * Permission to use, copy, modify, and/or distribute this software for any * + * purpose with or without fee is hereby granted. * + * * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * + ****************************************************************************/ + +#include "regex.h" +#include + +int bfs_regcomp(regex_t *preg, const char *regex, int cflags, enum bfs_regex_type type) { +#if BFS_WITH_ONIGURUMA + // Oniguruma's POSIX wrapper uses the selected default syntax when REG_EXTENDED is set + cflags |= REG_EXTENDED; + + switch (type) { + case BFS_REGEX_POSIX_BASIC: + onig_set_default_syntax(ONIG_SYNTAX_POSIX_BASIC); + break; + case BFS_REGEX_POSIX_EXTENDED: + onig_set_default_syntax(ONIG_SYNTAX_POSIX_EXTENDED); + break; + case BFS_REGEX_EMACS: + onig_set_default_syntax(ONIG_SYNTAX_EMACS); + break; + case BFS_REGEX_GREP: + onig_set_default_syntax(ONIG_SYNTAX_GREP); + break; + } +#else + switch (type) { + case BFS_REGEX_POSIX_BASIC: + cflags &= ~REG_EXTENDED; + break; + case BFS_REGEX_POSIX_EXTENDED: + cflags |= REG_EXTENDED; + break; + default: + return REG_BADPAT; + } +#endif + + return regcomp(preg, regex, cflags); +} + +char *bfs_regerror(int err, const regex_t *regex) { + size_t len = regerror(err, regex, NULL, 0); + char *str = malloc(len); + if (str) { + regerror(err, regex, str, len); + } + return str; +} -- cgit v1.2.3