time.h

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// BSD 3-Clause License
// Copyright (c) 2021-2025, 🍀☀🌕🌥 🌊
// See the LICENSE file in the project root for full license information.
 
#pragma once
 
#include <ctime>
 
namespace kcenon::pacs::compat {
 
inline std::tm* localtime_safe(const std::time_t* time, std::tm* result) {
#if defined(_WIN32) || defined(_WIN64)
    // Windows: localtime_s returns errno_t (0 on success)
    // Parameter order: (tm*, time_t*)
    return localtime_s(result, time) == 0 ? result : nullptr;
#else
    // POSIX: localtime_r returns tm* (result on success, nullptr on failure)
    // Parameter order: (time_t*, tm*)
    return localtime_r(time, result);
#endif
}
 
inline std::tm* gmtime_safe(const std::time_t* time, std::tm* result) {
#if defined(_WIN32) || defined(_WIN64)
    // Windows: gmtime_s returns errno_t (0 on success)
    return gmtime_s(result, time) == 0 ? result : nullptr;
#else
    // POSIX: gmtime_r returns tm*
    return gmtime_r(time, result);
#endif
}
 
}  // namespace kcenon::pacs::compat