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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef _D_A2_FUNCTIONAL_H_
#define _D_A2_FUNCTIONAL_H_
#include <functional>
#include "SharedHandle.h"
#include "A2STR.h"
#include <string>
namespace aria2 {
// mem_fun_t for SharedHandle
template <class ReturnType, typename ClassType>
class mem_fun_sh_t:public std::unary_function< SharedHandle<ClassType>, ReturnType>
{
private:
ReturnType (ClassType::*f)();
public:
mem_fun_sh_t(ReturnType (ClassType::*f)()):f(f) {}
ReturnType operator()(const SharedHandle<ClassType>& x) const
{
return (x.get()->*f)();
}
};
// const_mem_fun_t for SharedHandle
template <class ReturnType, typename ClassType>
class const_mem_fun_sh_t:public std::unary_function< SharedHandle<ClassType>, ReturnType>
{
private:
ReturnType (ClassType::*f)() const;
public:
const_mem_fun_sh_t(ReturnType (ClassType::*f)() const):f(f) {}
ReturnType operator()(const SharedHandle<ClassType>& x) const
{
return (x.get()->*f)();
}
};
template <class ReturnType, typename ClassType>
mem_fun_sh_t<ReturnType, ClassType>
mem_fun_sh(ReturnType (ClassType::*f)())
{
return mem_fun_sh_t<ReturnType, ClassType>(f);
};
template <class ReturnType, typename ClassType>
const_mem_fun_sh_t<ReturnType, ClassType>
mem_fun_sh(ReturnType (ClassType::*f)() const)
{
return const_mem_fun_sh_t<ReturnType, ClassType>(f);
};
template<class BinaryOp, class UnaryOp>
class adopt2nd_t:public std::binary_function<typename BinaryOp::first_argument_type,
typename UnaryOp::argument_type,
typename BinaryOp::result_type> {
private:
BinaryOp _binaryOp;
UnaryOp _unaryOp;
public:
adopt2nd_t(const BinaryOp& b, const UnaryOp& u):
_binaryOp(b), _unaryOp(u) {}
typename BinaryOp::result_type
operator()(const typename BinaryOp::first_argument_type& x,
const typename UnaryOp::argument_type& y)
{
return _binaryOp(x, _unaryOp(y));
}
};
template <class BinaryOp, class UnaryOp>
inline adopt2nd_t<BinaryOp, UnaryOp>
adopt2nd(const BinaryOp& binaryOp, const UnaryOp& unaryOp)
{
return adopt2nd_t<BinaryOp, UnaryOp>(binaryOp, unaryOp);
};
template<typename Pair>
class Ascend1st:public std::binary_function<Pair, Pair, bool>
{
public:
bool operator()(const Pair& p1, const Pair& p2) const
{
return p1.first < p2.first;
}
};
template<typename Pair>
class select2nd
{
public:
typename Pair::second_type operator()(const Pair& p) const
{
return p.second;
}
typename Pair::second_type operator()(Pair& p) const
{
return p.second;
}
};
class Concat {
private:
std::string _delim;
public:
Concat(const std::string& delim = A2STR::NIL):_delim(delim) {}
std::string operator()(const std::string& s1, const std::string& s2) const
{
return s1+_delim+s2;
}
};
class Deleter {
public:
template<class T>
void operator()(T* ptr) {
delete ptr;
}
};
template<typename T>
class Append {
private:
T& _to;
T _delim;
public:
template<typename S>
Append(T& to, const S& delim):_to(to), _delim(delim) {}
template<typename S>
void operator()(const S& s) {
_to += s+_delim;
}
};
typedef Append<std::string> StringAppend;
} // namespace aria2
#endif // _D_A2_FUNCTIONAL_H_
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