construct/ircd/exception.cc

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.

#include <boost/system/system_error.hpp>

[[noreturn]] static void
ircd_terminate_handler()
noexcept
{
	std::abort();
}

void
ircd::aborting()
noexcept
{
	std::set_terminate(&ircd_terminate_handler);
}

std::string
ircd::string(const boost::system::system_error &e)
{
	return string(e.code());
}

std::string
ircd::string(const boost::system::error_code &ec)
{
	return ircd::string(128, [&ec]
	(const mutable_buffer &buf)
	{
		return string(buf, ec);
	});
}

ircd::string_view
ircd::string(const mutable_buffer &buf,
             const boost::system::system_error &e)
{
	return string(buf, e.code());
}

ircd::string_view
ircd::string(const mutable_buffer &buf,
             const boost::system::error_code &ec)
{
	const auto len
	{
		fmt::sprintf
		{
			buf, "%s: %s", ec.category().name(), ec.message()
		}
	};

	return { data(buf), size_t(len) };
}

std::exception_ptr
ircd::make_eptr(const boost::system::error_code &ec)
{
	return bool(ec)?
		std::make_exception_ptr(boost::system::system_error(ec)):
		std::exception_ptr{};
}

void
ircd::throw_system_error(const int &code)
{
	throw std::system_error(code, std::system_category());
}

std::exception_ptr
ircd::make_system_error(const int &code)
{
	return std::make_exception_ptr(std::system_error(code, std::system_category()));
}

ssize_t
ircd::exception::generate(const char *const &fmt,
                          const va_rtti &ap)
noexcept
{
	return fmt::vsnprintf(buf, sizeof(buf), fmt, ap);
}

ssize_t
ircd::exception::generate(const char *const &name,
                          const char *const &fmt,
                          const va_rtti &ap)
noexcept
{
	size_t size(0);
	const bool empty(!fmt || !fmt[0] || fmt[0] == ' ');
	size = strlcat(buf, name, sizeof(buf));
	size = strlcat(buf, empty? "." : ": ", sizeof(buf));
	if(size < sizeof(buf))
		size += fmt::vsnprintf(buf + size, sizeof(buf) - size, fmt, ap);

	return size;
}

void
ircd::assertion()
noexcept(RB_DEBUG_LEVEL)
{
	if(std::uncaught_exceptions())
	{
		assertion(std::current_exception());
	} else {
		log::critical("IRCd Assertion without active exception.");
		assert(0);
		throw assertive{};
	}
}

void
ircd::assertion(std::exception_ptr eptr)
noexcept(RB_DEBUG_LEVEL) try
{
	std::rethrow_exception(eptr);
}
catch(const std::exception &e)
{
	assertion(e);
}

void
ircd::assertion(const std::exception &e)
noexcept(RB_DEBUG_LEVEL)
{
	#ifdef RB_DEBUG
		terminate(e);
	#else
		log::critical("IRCd Assertion %s", e.what());
		throw e;
	#endif
}

void
ircd::terminate()
noexcept
{
	terminate(std::current_exception());
}

void
ircd::terminate(std::exception_ptr eptr)
noexcept
{
	if(eptr) try
	{
		std::rethrow_exception(eptr);
	}
	catch(const std::exception &e)
	{
		terminate(e);
	}

	log::critical("IRCd Terminate without exception");
	std::terminate();
}

void
ircd::terminate(const std::exception &e)
noexcept
{
	log::critical("IRCd Terminated: %s", e.what());
	throw e;
}