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/* regextype.h -- Decode the name of a regular expression syntax.
Copyright (C) 2005-2021 Free Software Foundation, Inc.
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Written by James Youngman <jay@gnu.org>.
*/
#ifndef REGEXTPE_H
# define REGEXTPE_H
/* Translate a regular expression type name into an option mask.
* This could convert "grep" into RE_SYNTAX_GREP, for example.
* Return -1 if there is no match.
*/
int get_regex_type(const char *s);
enum {
CONTEXT_FINDUTILS = 1u,
CONTEXT_GENERIC = 2u,
CONTEXT_ALL = CONTEXT_GENERIC|CONTEXT_FINDUTILS,
};
/* Returns the regex type name corresponding to index IX.
* Indexes start at 0. Returns NULL if IX is too large.
*/
const char * get_regex_type_name(unsigned int ix);
/* Returns the option mask name corresponding to regular expresion
* type index IX. Indexes start at 0. Behaviour is undefined if IX
* has a value which would cause get_regex_type_name to return NULL.
*/
int get_regex_type_flags(unsigned int ix);
/* If regular expression type IX (which is a regular expression type
* index) has one or more synonyms which is interesting in context
* CONTEXT, return the index of one of them. Otherwise, return -1.
*/
int get_regex_type_synonym(unsigned int ix, unsigned int context);
/* Returns one of CONTEXT_FINDUTILS, CONTEXT_GENERIC or CONTEXT_ALL.
* This identifies whether this regular expression type index is relevant for,
* respectively, findutils, general callers, or all callers.
*/
unsigned int get_regex_type_context(unsigned int ix);
#endif
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