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Contents
module Zip
class DOSTime < Time #:nodoc:all
# MS-DOS File Date and Time format as used in Interrupt 21H Function 57H:
# Register CX, the Time:
# Bits 0-4 2 second increments (0-29)
# Bits 5-10 minutes (0-59)
# bits 11-15 hours (0-24)
# Register DX, the Date:
# Bits 0-4 day (1-31)
# bits 5-8 month (1-12)
# bits 9-15 year (four digit year minus 1980)
def to_binary_dos_time
(sec / 2) +
(min << 5) +
(hour << 11)
end
def to_binary_dos_date
day +
(month << 5) +
((year - 1980) << 9)
end
# Dos time is only stored with two seconds accuracy
def dos_equals(other)
to_i / 2 == other.to_i / 2
end
# Create a DOSTime instance from a vanilla Time instance.
def self.from_time(time)
local(time.year, time.month, time.day, time.hour, time.min, time.sec)
end
def self.parse_binary_dos_format(bin_dos_date, bin_dos_time)
second = 2 * (0b11111 & bin_dos_time)
minute = (0b11111100000 & bin_dos_time) >> 5
hour = (0b1111100000000000 & bin_dos_time) >> 11
day = (0b11111 & bin_dos_date)
month = (0b111100000 & bin_dos_date) >> 5
year = ((0b1111111000000000 & bin_dos_date) >> 9) + 1980
begin
local(year, month, day, hour, minute, second)
end
end
end
end
# Copyright (C) 2002, 2003 Thomas Sondergaard
# rubyzip is free software; you can redistribute it and/or
# modify it under the terms of the ruby license.
Version data entries
42 entries across 32 versions & 8 rubygems