static_assert( __cplusplus > 2020'99 );

#pragma once

#include <Alepha/Alepha.h>

#include <unistd.h>

#include <streambuf>

namespace Alepha::Hydrogen::IOStreams  ::detail::  OutUnixFileBuf_m
{
	inline namespace exports
	{
		class OutUnixFileBuf;
	}

	class exports::OutUnixFileBuf
		: virtual public std::streambuf
	{
		private:
			int fd;

			int
			overflow( const int ch_ ) override
			{
				if( ch_ == EOF ) throw std::runtime_error{ "Unexpected EOF" };
				const char ch= ch_;
				xsputn( &ch, 1 );
				return ch_;
			}

			std::streamsize
			xsputn( const char *const data, const std::streamsize amt ) override
			{
				return ::write( fd, data, amt );
			}

		public:
			explicit OutUnixFileBuf( const int fd ) : fd( fd ) {}
	};
}

namespace Alepha::Hydrogen::IOStreams::inline exports::inline OutUnixFileBuf_m
{
	using namespace detail::OutUnixFileBuf_m::exports;
}