mirror of https://github.com/oxen-io/oxen-core.git
132 lines
4.9 KiB
C++
132 lines
4.9 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include <iomanip>
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#include <regex>
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#include <type_traits>
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#include <charconv>
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#include "../misc_language.h"
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#include "portable_storage_base.h"
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#include "parserse_base_utils.h"
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#include "../warnings.h"
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namespace epee
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{
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namespace serialization
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{
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#define ASSERT_AND_THROW_WRONG_CONVERSION() ASSERT_MES_AND_THROW("WRONG DATA CONVERSION @ " << __FILE__ << ":" << __LINE__ << ": " << typeid(from).name() << " to " << typeid(to).name())
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template<typename From, typename To, typename SFINAE = void>
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struct converter
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{
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void operator()(const From& from, To& to)
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{
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ASSERT_AND_THROW_WRONG_CONVERSION();
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}
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};
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template<typename From, typename To>
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struct converter<From, To, std::enable_if_t<
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!std::is_same_v<To, From> && std::is_integral_v<To> && std::is_integral_v<From> &&
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!std::is_same_v<From, bool> && !std::is_same_v<To, bool>>>
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{
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void operator()(const From& from, To& to)
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{
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PUSH_WARNINGS
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DISABLE_VS_WARNINGS(4018)
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DISABLE_CLANG_WARNING(tautological-constant-out-of-range-compare)
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DISABLE_GCC_AND_CLANG_WARNING(sign-compare)
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bool in_range;
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if constexpr (std::is_signed_v<From> == std::is_signed_v<To>) // signed -> signed or unsigned -> unsigned
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in_range = from >= std::numeric_limits<To>::min() && from <= std::numeric_limits<To>::max();
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else if constexpr (std::is_signed_v<To>) // unsigned -> signed
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in_range = from <= std::numeric_limits<To>::max();
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else // signed -> unsigned
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in_range = from >= 0 && from <= std::numeric_limits<To>::max();
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CHECK_AND_ASSERT_THROW_MES(in_range,
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"int value overflow: cannot convert value " << +from << " to integer type with range ["
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<< +std::numeric_limits<To>::min() << "," << +std::numeric_limits<To>::max() << "]");
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to = static_cast<To>(from);
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POP_WARNINGS
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}
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};
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// For MyMonero/OpenMonero backend compatibility
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// MyMonero backend sends amount, fees and timestamp values as strings.
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// Until MM backend is updated, this is needed for compatibility between OpenMonero and MyMonero.
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template<>
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struct converter<std::string, uint64_t>
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{
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// MyMonero ISO 8061 timestamp (2017-05-06T16:27:06Z)
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inline static std::regex mymonero_iso8061_timestamp{R"(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\dZ)"};
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void operator()(const std::string& from, uint64_t& to)
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{
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MTRACE("Converting std::string to uint64_t. Source: " << from);
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const auto* strend = from.data() + from.size();
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if (auto [p, ec] = std::from_chars(from.data(), strend, to); ec == std::errc{} && p == strend)
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return; // Good: successfully consumed the whole string.
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if (std::regex_match(from, mymonero_iso8061_timestamp))
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{
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// Convert to unix timestamp
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std::tm tm{};
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std::istringstream ss{from};
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if (ss >> std::get_time(&tm, "%Y-%m-%dT%H:%M:%S"))
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{
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to = std::mktime(&tm);
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return;
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}
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}
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ASSERT_AND_THROW_WRONG_CONVERSION();
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}
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};
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template<typename From, typename To>
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struct converter<From, To, std::enable_if_t<std::is_same<To, From>::value>>
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{
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void operator()(const From& from, To& to)
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{
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to = from;
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}
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};
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template<class From, class To>
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void convert_t(const From& from, To& to)
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{
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converter<From, To>{}(from, to);
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}
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}
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}
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