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/* tnt/regex.h
* Copyright (C) 2005 Tommi Maekitalo
*
* 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 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
* NON-INFRINGEMENT. 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef TNT_REGEX_H
#define TNT_REGEX_H
#include <string>
#include <sys/types.h>
#include <regex.h>
namespace tnt
{
/// collects matches in a regex
class regex_smatch
{
friend class regex;
std::string str;
regmatch_t matchbuf[10];
public:
unsigned size() const;
std::string get(unsigned n) const;
std::string format(const std::string& s) const;
};
/// regex(3)-wrapper.
/// Warning: incomplete, but sufficient for tntnet.
/// Regular expression is not automatically freed. Tntnet needs to
/// put regex into a stl-container, so it needs to be copyable.
/// For this class to be complete, the regex_t needs to be
/// reference-counted. This is unneeded for tntnet, because the regex is
/// never freed anyway.
class regex
{
regex_t expr;
void checkerr(int ret) const;
public:
explicit regex(const char* ex, int cflags = REG_EXTENDED)
{
checkerr(::regcomp(&expr, ex, cflags));
}
explicit regex(const std::string& ex, int cflags = REG_EXTENDED)
{
checkerr(::regcomp(&expr, ex.c_str(), cflags));
}
bool match(const std::string& str_, regex_smatch& smatch, int eflags = 0) const;
bool match(const std::string& str_, int eflags = 0) const;
void free();
private:
friend class value_type;
};
}
#endif // TNT_REGEX_H
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