#include <psemek/io/file_stream.hpp>

namespace psemek::io
{

	std::size_t istream::read_all(char * p, std::size_t size)
	{
		auto left = size;
		while (left > 0)
		{
			auto s = read(p, left);
			if (s == 0)
				throw istream_end{};
			p += s;
			left -= s;
		}
		return size;
	}

	std::size_t ostream::write_all(char const * p, std::size_t size)
	{
		auto left = size;
		while (left > 0)
		{
			auto s = write(p, left);
			if (s == 0)
				throw ostream_end{};
			p += s;
			left -= s;
		}
		return size;
	}

	std::unique_ptr<istream> std_in()
	{
		return std::make_unique<file_istream>(stdin);
	}

	std::unique_ptr<ostream> std_out()
	{
		return std::make_unique<file_ostream>(stdout);
	}

	std::unique_ptr<ostream> std_err()
	{
		return std::make_unique<file_ostream>(stderr);
	}

}