/**
	This file is a part of rexy's matrix client
	Copyright (C) 2019-2020 rexy712

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published by
	the Free Software Foundation, either version 3 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 Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef RAII_RJP_STRING_HPP
#define RAII_RJP_STRING_HPP

#include <rjp.h>
#include <rexy/string_base.hpp>
#include <utility> //exchange
#include <cstdlib> //memcpy

namespace raii{

	namespace detail{

		class rjp_allocator
		{
		public:
			static void free(void* data);
			static void* allocate(size_t size);
			static void* copy(const void* data, size_t len);
		};

	}

	//rjp allocated string
	struct rjp_string : public rexy::string_intermediary<detail::rjp_allocator>
	{
		rjp_string(const rjp_string&) = default;
		rjp_string(rjp_string&&) = default;
		rjp_string& operator=(const rjp_string&) = default;
		rjp_string& operator=(rjp_string&&) = default;

		using rexy::string_intermediary<detail::rjp_allocator>::string_intermediary;
		rjp_string(RJP_value* r):
			rexy::string_intermediary<detail::rjp_allocator>(r ? rjp_get_string(r)->value : nullptr,
			                                           r ? rjp_get_string(r)->length : 0,
			                                           r ? rjp_get_string(r)->length : 0)
		{
			if(r){
				RJP_string* str = rjp_get_string(r);
				str->value = nullptr;
				str->length = 0;
				rjp_set_null(r);
			}
		}
		using rexy::string_intermediary<detail::rjp_allocator>::operator=;
		rjp_string& operator=(RJP_value* r){
			if(!r)
				return *this;
			reset();
			RJP_string* str = rjp_get_string(r);
			m_data = std::exchange(str->value, nullptr);
			m_length = str->length;
			m_cap = str->length;
			str->length = 0;
			return *this;
		}
	};
}

#endif