/usr/include/cxxtools/regex.h is in libcxxtools-dev 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2005-2008 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef CXXTOOLS_REGEX_H
#define CXXTOOLS_REGEX_H
#include <string>
#include <sys/types.h>
#include <regex.h>
#include <cxxtools/smartptr.h>
namespace cxxtools
{
class RegexSMatch;
template <typename objectType>
class RegexDestroyPolicy;
template <>
class RegexDestroyPolicy<regex_t>
{
protected:
void destroy(regex_t* expr)
{
::regfree(expr);
delete expr;
}
};
/// regex(3)-wrapper.
class Regex
{
SmartPtr<regex_t, ExternalRefCounted, RegexDestroyPolicy> expr;
void checkerr(int ret) const;
public:
Regex()
{ }
explicit Regex(const char* ex, int cflags = REG_EXTENDED)
: expr(0)
{
if (ex && ex[0])
{
expr = new regex_t();
checkerr(::regcomp(expr.getPointer(), ex, cflags));
}
}
explicit Regex(const std::string& ex, int cflags = REG_EXTENDED)
: expr(0)
{
if (!ex.empty())
{
expr = new regex_t();
checkerr(::regcomp(expr.getPointer(), ex.c_str(), cflags));
}
}
bool match(const std::string& str_, RegexSMatch& smatch, int eflags = 0) const;
bool match(const std::string& str_, int eflags = 0) const;
void free() { expr = 0; }
bool empty() const { return expr.getPointer() == 0; }
};
/// collects matches in a regex
class RegexSMatch
{
friend class Regex;
std::string str;
regmatch_t matchbuf[10];
public:
RegexSMatch()
{
matchbuf[0].rm_so = 0;
}
/// returns the number of expressions, which were found
unsigned size() const;
/// returns the start position of the n-th expression
regoff_t offsetBegin(unsigned n) const { return matchbuf[n].rm_so; }
/// returns the end position of the n-th expression
regoff_t offsetEnd(unsigned n) const { return matchbuf[n].rm_eo; }
/// returns true if the n-th element is set.
bool has(unsigned n) const
{ return matchbuf[n].rm_so >= 0; }
/// returns the n-th element. No range checking is done.
std::string get(unsigned n) const;
/// replace each occurence of "$n" with the n-th element (n: 0..9).
std::string format(const std::string& s) const;
/// returns the n-th element. No range checking is done.
std::string operator[] (unsigned n) const
{ return get(n); }
};
}
#endif // CXXTOOLS_REGEX_H
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