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tcpkali_regex.h
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/*
* Copyright (c) 2016 Machine Zone, Inc.
*
* Original author: Lev Walkin <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef TCPKALI_REGEX_H
#define TCPKALI_REGEX_H
#include <pcg_basic.h>
typedef struct tregex tregex;
/* [a-z] = ('a', 'z') */
tregex *tregex_range(unsigned char from, unsigned char to);
/* [abcdef] = ("abcdef") */
tregex *tregex_range_from_string(const char *str, ssize_t);
/* "abc" = ("abc") */
tregex *tregex_string(const char *str, ssize_t len);
/* [a-zA-Z] = ([a-z], [A-Z]) */
tregex *tregex_union_ranges(tregex *, tregex *);
/* "abcde" = ("ab", "cde") */
tregex *tregex_join(tregex *, tregex *);
/* (ab|cde) = ("ab", "cde") */
tregex *tregex_alternative(tregex *rhs);
tregex *tregex_alternative_add(tregex *base, tregex *rhs);
/* "a?" = ("a", 0, 1) */
tregex *tregex_repeat(tregex *, unsigned from, unsigned to);
size_t tregex_min_size(tregex *);
size_t tregex_max_size(tregex *);
/*
* Returns -1 if the expression can't fit into the provided buffer in full.
* Returns the actual size of the data put into the buffer otherwise.
*/
ssize_t tregex_eval_rng(tregex *, char *buf, size_t size, pcg32_random_t *rng);
ssize_t tregex_eval(tregex *, char *buf, size_t size);
void tregex_free(tregex *);
#endif /* TCPKALI_REGEX_H */