64 位 Unix 时间戳转换 [英] 64-bit Unix timestamp conversion

问题描述

是否有针对 32 位系统的 64 位 Unix 时间戳转换的 C++ 实现?我需要将 struct tm 转换为 64 位整数，反之亦然，包括闰年、时区、UTC.还需要它的便携性，至少对于 GNU/Linux 和 Windows.

Is there any C++ implementation of 64-bit Unix timestamp conversions for 32-bit systems? I need to convert struct tm to 64-bit integer and vice versa, including leap years, time zones, UTC. Also need it portable, at least for GNU/Linux and Windows.

推荐答案

您需要:

typedef long long time64_t; 
time64_t mktime64(struct tm *t); 
struct tm* localtime64_r(const time64_t* t, struct tm* p);

最初(2011 年)此答案包含指向 2038bug.com 的链接，可以在其中下载包含上述函数的小型 pivotal_gmtime_r 库.当时该库已从 2038bug.com 中删除，链接已损坏并被版主从答案中删除.似乎现在可以在此处找到 pivotal_gmtime_r 代码:

Originally (in 2011) this answer contained links to 2038bug.com where it was possible to download the small pivotal_gmtime_r library, containing the mentioned functions. The library has been removed from 2038bug.com back then, the links became broken and were removed from the answer by a moderator. Seems like that pivotal_gmtime_r code can now be found here:

https://github.com/franklin373/mortage/tree/master/time_pivotal

此外，我还发现了另一个更新的库，名为 y2038，它也实现了 mktime64 和 localtime64_r:

Also, I've found another, more recent library, called y2038, that also implements mktime64 and localtime64_r:

https://github.com/evalEmpire/y2038

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