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/****************************************************************************
* bfs *
* Copyright (C) 2022 Tavian Barnes <tavianator@tavianator.com> and bfs *
* contributors *
* *
* 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. *
****************************************************************************/
#ifndef BFS_REGEX_H
#define BFS_REGEX_H
#if BFS_WITH_ONIGURUMA
# include <onigposix.h>
#else
# include <regex.h>
#endif
/**
* Regex syntax flavors.
*/
enum bfs_regex_type {
BFS_REGEX_POSIX_BASIC,
BFS_REGEX_POSIX_EXTENDED,
BFS_REGEX_EMACS,
BFS_REGEX_GREP,
};
/**
* Wrapper for regcomp() that supports additional regex types.
*
* @param preg
* The compiled regex.
* @param regex
* The regular expression to compile.
* @param cflags
* Regex compilation flags.
* @param type
* The regular expression syntax to use.
* @return
* 0 on success, or an error code on failure.
*/
int bfs_regcomp(regex_t *preg, const char *regex, int cflags, enum bfs_regex_type type);
/**
* Dynamically allocate a regex error message.
*
* @param err
* The error code to stringify.
* @param regex
* The compiled regex, or NULL if compilation failed.
* @return
* A human-readable description of the error, allocated with malloc().
*/
char *bfs_regerror(int err, const regex_t *regex);
#endif // BFS_REGEX_H
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