ruby - 如何将 FILETIME 转换为 Ruby 时间，反之亦然

Question

MSDN 将 FILETIME 定义为

64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 (UTC).

如何在 FILETIME 和 Ruby Time 之间转换？

Answer 1

class Time
  # Convert the time to the FILETIME format, a 64-bit value representing the
  # number of 100-nanosecond intervals since January 1, 1601 (UTC).
  def wtime
    self.to_i * 10000000 + (self.tv_nsec/100.0).round + 116444736000000000
  end

  # Create a time object from the FILETIME format, a 64-bit value representing
  # the number of 100-nanosecond intervals since January 1, 1601 (UTC).
  def self.from_wtime(wtime)
    Time.at((wtime - 116444736000000000) / 10000000,
            ((wtime - 116444736000000000) % 10000000)/10.0)
  end
end

来源:Christopher Sexton ，我修复了纳秒/100 精度。

用法:

wtime = 131172192735329876
#=> 131172192735329876

t = Time.from_wtime(wtime)
#=> 2016-09-01 12:01:13 -0400

t.wtime
#=> 131172192735329876

t.wtime == wtime
#=> true

Time.now.wtime
#=> 131520319622603520