80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/**
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This file is a part of the rcw project
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Copyright (C) 2021 rexy712
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef RCW_READ_WRITE_CBACK_HPP
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#define RCW_READ_WRITE_CBACK_HPP
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#include <cstdlib> //size_t
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#include <tuple>
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#include <utility> //forward
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#include <rexy/meta.hpp> //sequence_tuple
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#include "string.hpp"
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namespace rcw{
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namespace detail{
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template<class Func, class... Args>
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struct curl_cback_invoker_helper{
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Func&& func;
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std::tuple<Args...> args;
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template<class... Ts, int... Indices>
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size_t operator()(rexy::sequence_tuple<Indices...>, Ts&&... ts){
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return std::forward<Func>(func)(std::forward<Ts>(ts)..., std::get<Indices>(args)...);
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}
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};
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struct curl_cback_invoker{
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virtual ~curl_cback_invoker(void) = default;
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virtual size_t operator()(char* data, size_t size, size_t nmemb) = 0;
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};
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template<class Func, class... Args>
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struct curl_cback_invoker_impl : public curl_cback_invoker{
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curl_cback_invoker_helper<Func, Args...> helper;
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curl_cback_invoker_impl(const curl_cback_invoker_impl&) = default;
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template<class Fn, class... Ts>
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curl_cback_invoker_impl(Fn&& f, Ts&&... ts):
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helper{std::forward<Fn>(f), {std::forward<Ts>(ts)...}}{}
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size_t operator()(char* data, size_t size, size_t nmemb)override{
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return helper(rexy::sequence_gen_t<sizeof...(Args)>{}, data, size, nmemb);
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}
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};
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template<class Func, class... Args>
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curl_cback_invoker_impl(Func&&, Args&&...) -> curl_cback_invoker_impl<Func&&, Args&&...>;
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}
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size_t curl_write_callback(char* data, size_t size, size_t nmemb, void* userdata);
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size_t curl_read_callback(char* data, size_t size, size_t nmemb, void* userdata);
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struct default_curl_write_callback{
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string data;
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size_t operator()(char* d, size_t size, size_t nmemb);
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};
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struct default_curl_read_callback{
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const char* data;
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size_t length;
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size_t offset = 0;
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size_t operator()(char* d, size_t size, size_t nmemb);
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};
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}
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#endif
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