libhttpserver/src/httpserver/binders.hpp at master · a-pavlov/libhttpserver · GitHub

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This file is part of libhttpserver

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.

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

#if !defined (_HTTPSERVER_HPP_INSIDE_) && !defined (HTTPSERVER_COMPILATION)

#error "Only <httpserver.hpp> or <httpserverpp> can be included directly."

#endif

#ifndef _BINDERS_HPP_

#define _BINDERS_HPP_

namespace httpserver {

namespace details

{

namespace binders

{

class generic_class;

const int MEMFUNC_SIZE = sizeof(void (generic_class::*)());

template<int N>

struct converter

{

template<typename X,

typename func_type,

typename generic_mem_func_type>

inline static generic_class* convert(

X* pmem,

func_type func,

generic_mem_func_type &bound

)

{

return 0;

}

};

template<>

struct converter<MEMFUNC_SIZE>

{

template<typename X,

typename func_type,

typename generic_mem_func_type>

inline static generic_class* convert(

X* pmem,

func_type func,

generic_mem_func_type &bound

)

{

bound = reinterpret_cast<generic_mem_func_type>(func);

return reinterpret_cast<generic_class*>(pmem);

}

};

template<typename generic_mem,

typename static_function,

typename void_static_function>

class binder

{

private:

typedef void (generic_class::*generic_mem_fun)();

typedef void (*generic_mem_ptr)();

generic_class *pmem;

generic_mem_fun _pfunc;

generic_mem_ptr _spfunc;

public:

binder()

{

}

binder(const binder& o):

pmem(o.pmem),

_pfunc(o._pfunc),

_spfunc(o._spfunc)

{

}

template<typename X, typename Y>

binder(X* pmem, Y fun):

pmem(converter<sizeof(fun)>::convert(pmem, fun, _pfunc)),

_spfunc(0)

{

}

template<class DC, class parent_invoker>

binder(DC* pp, parent_invoker invoker, static_function fun):

pmem(converter<sizeof(invoker)>::convert(pp, invoker, _pfunc)),

_spfunc(reinterpret_cast<generic_mem_ptr>(fun))

{

}

inline generic_class* exec() const

{

return pmem;

}

inline generic_mem get_mem_ptr() const

{

return reinterpret_cast<const generic_mem>(_pfunc);

}

inline void_static_function get_static_func() const

{

return reinterpret_cast<void_static_function>(_spfunc);

}

};

template<typename PAR1, typename RET_TYPE=void>

class functor_one

{

private:

typedef RET_TYPE (*static_function)(PAR1 p1);

typedef RET_TYPE (*void_static_function)(PAR1 p1);

typedef RET_TYPE (generic_class::*generic_mem)(PAR1 p1);

typedef binder<generic_mem,

static_function, void_static_function> binder_type;

binder_type _binder;

RET_TYPE exec_static(PAR1 p1) const

{

return (*(_binder.get_static_func()))(p1);

}

functor_one& operator=(const functor_one&)

{

return *this;

}

public:

typedef functor_one type;

functor_one() { }

template <typename X, typename Y>

functor_one(Y* pmem, RET_TYPE(X::*func)(PAR1 p1) ):

_binder(reinterpret_cast<X*>(pmem), func)

{

}

functor_one(RET_TYPE(*func)(PAR1 p1) ):

_binder(this, &functor_one::exec_static, func)

{

}

RET_TYPE operator() (PAR1 p1) const

{

return (_binder.exec()->*(_binder.get_mem_ptr()))(p1);

}

};

template<typename PAR1, typename PAR2, typename RET_TYPE=void>

class functor_two

{

private:

typedef RET_TYPE (*static_function)(PAR1 p1, PAR2 p2);

typedef RET_TYPE (*void_static_function)(PAR1 p1, PAR2 p2);

typedef RET_TYPE

(generic_class::*generic_mem)(PAR1 p1, PAR2 p2);

typedef binder<

generic_mem, static_function, void_static_function

> binder_type;

binder_type _binder;

RET_TYPE exec_static(PAR1 p1, PAR2 p2) const

{

return (*(_binder.get_static_func()))(p1, p2);

}

public:

typedef functor_two type;

functor_two() { }

functor_two(const functor_two& o):

_binder(o._binder)

{

}

template <typename X, typename Y>

functor_two(Y* pmem, RET_TYPE(X::*func)(PAR1 p1, PAR2 p2) ):

_binder(reinterpret_cast<X*>(pmem), func)

{

}

functor_two(RET_TYPE(*func)(PAR1 p1, PAR2 p2) ):

_binder(this, &functor_two::exec_static, func)

{

}

RET_TYPE operator() (PAR1 p1, PAR2 p2) const

{

return (_binder.exec()->*(_binder.get_mem_ptr()))(p1, p2);

}

};

}

}}

#endif

libhttpserver/src/httpserver/binders.hpp at master · a-pavlov/libhttpserver · GitHub

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