rexylib/include/rexy/binary.tpp

/**
	This file is a part of rexy's general purpose library
	Copyright (C) 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 REXY_BINARY_TPP
#define REXY_BINARY_TPP

#include <cstdlib> //size_t
#include <utility> //move
#include <cstring> //memcpy
#include <type_traits>
#include "cx/utility.hpp" //max
#include "detail/default_allocator.hpp"
#include "steal.hpp"

#define STOP_STRICT_ALIAS_WARNING(x) (x)

namespace rexy{

	constexpr binary_base::binary_base(char* data, size_t size)noexcept:
		m_data(data), m_cap(size){}
	constexpr binary_base::binary_base(char* data, size_t cap, size_t size)noexcept:
		m_data(data), m_size(size), m_cap(cap){}
	binary_base::binary_base(const binary_base& b)noexcept{}

	constexpr char* binary_base::release(void)noexcept{
		return cx::exchange(m_data, nullptr);
	}

	constexpr size_t binary_base::size(void)const{
		return m_size;
	}
	constexpr size_t binary_base::capacity(void)const{
		return m_cap;
	}
	constexpr char* binary_base::get(void){
		return m_data;
	}
	constexpr const char* binary_base::get(void)const{
		return m_data;
	}
	constexpr binary_base::operator bool(void)const{
		return m_data;
	}

	constexpr char& binary_base::operator[](size_t i)noexcept{
		return m_data[i];
	}
	constexpr const char& binary_base::operator[](size_t i)const noexcept{
		return m_data[i];
	}

	template<class Allocator>
	binary_data<Allocator>::binary_data(const char* data, size_t size)
		noexcept(noexcept(Allocator::copy(data, size))):
		binary_base(reinterpret_cast<char*>(Allocator::copy(data, size)), size){}
	template<class Allocator>
	constexpr binary_data<Allocator>::binary_data(rexy::steal<char*> data, size_t size)noexcept:
		binary_base(data.value(), size){}
	template<class Allocator>
	constexpr binary_data<Allocator>::binary_data(rexy::steal<char*> data, size_t cap, size_t size)noexcept:
		binary_base(data.value(), cap, size){}
	template<class Allocator>
	binary_data<Allocator>::binary_data(const char* data, size_t cap, size_t size)
		noexcept(noexcept(Allocator::copy(data, size))):
		binary_base(reinterpret_cast<char*>(Allocator::copy(data, size)), cap, size){}
	template<class Allocator>
	binary_data<Allocator>::binary_data(size_t size)
		noexcept(noexcept(Allocator::allocate(size))):
		binary_base(reinterpret_cast<char*>(Allocator::allocate(size)), size){}
	template<class Allocator>
	binary_data<Allocator>::binary_data(const binary_data& b)
		noexcept(noexcept(Allocator::copy(b.m_data, b.m_cap))):
		binary_base(b.m_data, b.m_cap, b.m_size)
	{
		m_data = Allocator::copy(b.m_data, b.m_cap);
	}
	template<class Allocator>
	constexpr binary_data<Allocator>::binary_data(binary_data&& b)noexcept:
		binary_base(cx::exchange(b.m_data, nullptr), b.m_cap, b.m_size){}
	template<class Allocator>
	binary_data<Allocator>::~binary_data(void)
		noexcept(noexcept(Allocator::free(m_data)))
	{
		Allocator::free(m_data);
	}
	template<class Allocator>
	binary_data<Allocator>& binary_data<Allocator>::operator=(const binary_data& b)
		noexcept(noexcept(Allocator::copy(b.m_data, b.m_size)))
	{
		binary_data<allocator_type> tmp(b);
		return (*this = std::move(tmp));
	}
	template<class Allocator>
	constexpr binary_data<Allocator>& binary_data<Allocator>::operator=(binary_data&& b)noexcept{
		m_size = b.m_size;
		m_cap = b.m_cap;
		cx::swap(m_data, b.m_data);
		return *this;
	}
	template<class Allocator>
	void binary_data<Allocator>::reset(void)
		noexcept(noexcept(Allocator::free(m_data)))
	{
		Allocator::free(m_data);
		m_data = nullptr;
		m_cap = m_size = 0;
	}
	template<class Allocator>
	void binary_data<Allocator>::reset(char* val, size_t cap, size_t size)
		noexcept(noexcept(Allocator::free(m_data)))
	{
		Allocator::free(m_data);
		m_data = val;
		m_cap = cap;
		m_size = size;
	}
	template<class Allocator>
	bool binary_data<Allocator>::resize(size_t newsize)
		noexcept(noexcept(Allocator::allocate(0)) &&
		         noexcept(Allocator::free(nullptr)))
	{
		if(newsize < m_cap)
			return false;
		binary_data<allocator_type> tmp(newsize);
		if(!tmp)
			return false;
		memcpy(STOP_STRICT_ALIAS_WARNING(tmp).m_data, m_data, m_size);
		cx::swap(m_data, STOP_STRICT_ALIAS_WARNING(tmp).m_data);
		m_cap = STOP_STRICT_ALIAS_WARNING(tmp).m_cap;
		return true;
	}
	template<class Allocator>
	void binary_data<Allocator>::append(const char* data, size_t len)
		noexcept(noexcept(Allocator::allocate(0)) &&
		         noexcept(Allocator::free(nullptr)))
	{
		if(m_size + len > m_cap)
			resize(cx::max(m_cap*2, m_size+len));
		memcpy(m_data+m_size, data, len);
		m_size += len;
	}

}

#undef STOP_STRICT_ALIAS_WARNING

#endif