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util: Implement ParseISO8601DateTime based on C++20

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This commit is contained in:
MarcoFalke
2024-11-28 13:08:10 +01:00
parent 144f98db85
commit 2222aecd5f
5 changed files with 101 additions and 8 deletions
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29
src/util/time.cpp
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@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Copyright (c) 2009-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -8,10 +8,13 @@
#include <compat/compat.h>
#include <tinyformat.h>
#include <util/check.h>
#include <util/strencodings.h>
#include <atomic>
#include <chrono>
#include <optional>
#include <string>
#include <string_view>
#include <thread>
void UninterruptibleSleep(const std::chrono::microseconds& n) { std::this_thread::sleep_for(n); }
@@ -60,6 +63,30 @@ std::string FormatISO8601Date(int64_t nTime)
return strprintf("%04i-%02u-%02u", signed{ymd.year()}, unsigned{ymd.month()}, unsigned{ymd.day()});
}
std::optional<int64_t> ParseISO8601DateTime(std::string_view str)
{
constexpr auto FMT_SIZE{std::string_view{"2000-01-01T01:01:01Z"}.size()};
if (str.size() != FMT_SIZE || str[4] != '-' || str[7] != '-' || str[10] != 'T' || str[13] != ':' || str[16] != ':' || str[19] != 'Z') {
return {};
}
const auto year{ToIntegral<uint16_t>(str.substr(0, 4))};
const auto month{ToIntegral<uint8_t>(str.substr(5, 2))};
const auto day{ToIntegral<uint8_t>(str.substr(8, 2))};
const auto hour{ToIntegral<uint8_t>(str.substr(11, 2))};
const auto min{ToIntegral<uint8_t>(str.substr(14, 2))};
const auto sec{ToIntegral<uint8_t>(str.substr(17, 2))};
if (!year || !month || !day || !hour || !min || !sec) {
return {};
}
const std::chrono::year_month_day ymd{std::chrono::year{*year}, std::chrono::month{*month}, std::chrono::day{*day}};
if (!ymd.ok()) {
return {};
}
const auto time{std::chrono::hours{*hour} + std::chrono::minutes{*min} + std::chrono::seconds{*sec}};
const auto tp{std::chrono::sys_days{ymd} + time};
return int64_t{TicksSinceEpoch<std::chrono::seconds>(tp)};
}
struct timeval MillisToTimeval(int64_t nTimeout)
{
struct timeval timeout;