================ @@ -0,0 +1,127 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// UNSUPPORTED: c++03, c++11, c++14, c++17 +// UNSUPPORTED: no-filesystem, no-localization, no-tzdb, has-no-zdump + +// XFAIL: libcpp-has-no-incomplete-tzdb +// XFAIL: availability-tzdb-missing + +// TODO TZDB Investigate +// XFAIL: target={{armv(7|8)l-linux-gnueabihf}} + +// This test compares the output of the zdump against the output based on the +// standard library implementation. It tests all available time zones and +// validates them. The specification of how to use the IANA database is limited +// and the real database contains quite a number of "interesting" cases. + +#include <chrono> +#include <format> +#include <fstream> +#include <cassert> + +#include "assert_macros.h" +#include "concat_macros.h" + +// The year range to validate. The dates used in practice are expected to be +// inside the tested range. +constexpr std::chrono::year first{1800}; +constexpr std::chrono::year last{2100}; + +// A custom sys_info class that also stores the name of the time zone. +// Its formatter matches the output of zdump. +struct sys_info : public std::chrono::sys_info { + sys_info(std::string_view name_, std::chrono::sys_info info) : std::chrono::sys_info{info}, name{name_} {} + + std::string name; +}; + +template <> +struct std::formatter<sys_info, char> { + template <class ParseContext> + constexpr typename ParseContext::iterator parse(ParseContext& ctx) { + return ctx.begin(); + } + + template <class FormatContext> + typename FormatContext::iterator format(const sys_info& info, FormatContext& ctx) const { + using namespace std::literals::chrono_literals; + + // Every "sys_info" entry of zdump consists of 2 lines. + // - 1 for first second of the range + // - 1 for last second of the range + // For example: + // Africa/Casablanca Sun Mar 25 02:00:00 2018 UT = Sun Mar 25 03:00:00 2018 +01 isdst=1 gmtoff=3600 + // Africa/Casablanca Sun May 13 01:59:59 2018 UT = Sun May 13 02:59:59 2018 +01 isdst=1 gmtoff=3600 + + if (info.begin != std::chrono::sys_seconds::min()) + ctx.advance_to(std::format_to( + ctx.out(), + "{} {:%a %b %e %H:%M:%S %Y} UT = {:%a %b %e %H:%M:%S %Y} {} isdst={:d} gmtoff={:%Q}\n", + info.name, + info.begin, + info.begin + info.offset, + info.abbrev, + info.save != 0s, + info.offset)); + + if (info.end != std::chrono::sys_seconds::max()) + ctx.advance_to(std::format_to( + ctx.out(), + "{} {:%a %b %e %H:%M:%S %Y} UT = {:%a %b %e %H:%M:%S %Y} {} isdst={:d} gmtoff={:%Q}\n", + info.name, + info.end - 1s, + info.end - 1s + info.offset, + info.abbrev, + info.save != 0s, + info.offset)); + + return ctx.out(); + } +}; + +void process(std::ostream& stream, const std::chrono::time_zone& zone) { + using namespace std::literals::chrono_literals; + + constexpr auto begin = std::chrono::time_point_cast<std::chrono::seconds>( + static_cast<std::chrono::sys_days>(std::chrono::year_month_day{first, std::chrono::January, 1d})); + constexpr auto end = std::chrono::time_point_cast<std::chrono::seconds>( + static_cast<std::chrono::sys_days>(std::chrono::year_month_day{last, std::chrono::January, 1d})); + + std::chrono::sys_seconds s = begin; + do { + sys_info info{zone.name(), zone.get_info(s)}; + + if (info.end >= end) + info.end = std::chrono::sys_seconds::max(); + + stream << std::format("{}", info); + s = info.end; + } while (s != std::chrono::sys_seconds::max()); +} + +int main(int, const char**) { + const std::chrono::tzdb& tzdb = std::chrono::get_tzdb(); + std::string file = std::tmpnam(nullptr); ---------------- ldionne wrote:
We have a facility for obtaining temporary files and making sure they get removed properly after. Let's use it! https://github.com/llvm/llvm-project/pull/85619 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
