check_container_size.hpp

00001 //
00002 // MessagePack for C++ static resolution routine
00003 //
00004 // Copyright (C) 2015 KONDO Takatoshi
00005 //
00006 //    Distributed under the Boost Software License, Version 1.0.
00007 //    (See accompanying file LICENSE_1_0.txt or copy at
00008 //    http://www.boost.org/LICENSE_1_0.txt)
00009 //
00010 #ifndef MSGPACK_CHECK_CONTAINER_SIZE_HPP
00011 #define MSGPACK_CHECK_CONTAINER_SIZE_HPP
00012 
00013 #include "msgpack/versioning.hpp"
00014 #include <stdexcept>
00015 
00016 namespace msgpack {
00017 
00018 /// @cond
00019 MSGPACK_API_VERSION_NAMESPACE(v1) {
00020 /// @endcond
00021 
00022 struct container_size_overflow : public std::runtime_error {
00023     explicit container_size_overflow(const std::string& msg)
00024         :std::runtime_error(msg) {}
00025 #if !defined(MSGPACK_USE_CPP03)
00026     explicit container_size_overflow(const char* msg):
00027         std::runtime_error(msg) {}
00028 #endif // !defined(MSGPACK_USE_CPP03)
00029 };
00030 
00031 namespace detail {
00032 
00033 template <std::size_t N>
00034 inline void check_container_size(std::size_t size) {
00035     if (size > 0xffffffff) throw container_size_overflow("container size overflow");
00036 }
00037 
00038 template <>
00039 inline void check_container_size<4>(std::size_t /*size*/) {
00040 }
00041 
00042 template <std::size_t N>
00043 inline void check_container_size_for_ext(std::size_t size) {
00044     if (size > 0xffffffff) throw container_size_overflow("container size overflow");
00045 }
00046 
00047 template <>
00048 inline void check_container_size_for_ext<4>(std::size_t size) {
00049 //    if (size > 0xfffffffe) throw container_size_overflow("container size overflow");
00050 }
00051 
00052 } // namespace detail
00053 
00054 template <typename T>
00055 inline uint32_t checked_get_container_size(T size) {
00056     detail::check_container_size<sizeof(T)>(size);
00057     return static_cast<uint32_t>(size);
00058 }
00059 
00060 
00061 /// @cond
00062 }  // MSGPACK_API_VERSION_NAMESPACE(v1)
00063 /// @endcond
00064 
00065 }  // namespace msgpack
00066 
00067 #endif // MSGPACK_CHECK_CONTAINER_SIZE_HPP