i3/include/regex.h

/*
 * vim:ts=4:sw=4:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
 *
 * regex.c: Interface to libPCRE (perl compatible regular expressions).
 *
 */
#pragma once

/**
 * Creates a new 'regex' struct containing the given pattern and a PCRE
 * compiled regular expression. Also, calls pcre_study because this regex will
 * most likely be used often (like for every new window and on every relevant
 * property change of existing windows).
 *
 * Returns NULL if the pattern could not be compiled into a regular expression
 * (and ELOGs an appropriate error message).
 *
 */
struct regex *regex_new(const char *pattern);

/**
 * Frees the given regular expression. It must not be used afterwards!
 *
 */
void regex_free(struct regex *regex);

/**
 * Checks if the given regular expression matches the given input and returns
 * true if it does. In either case, it logs the outcome using LOG(), so it will
 * be visible without debug logging.
 *
 */
bool regex_matches(struct regex *regex, const char *input);