thanks Al, what if i know the time format is 24hr? my batch file won't
run so long, i can think it'll finish in the same day.
that's a pretty challenging goal given the computational limitations of
batch scripting, and the need to compensate for the different possible
time
formats (24 hr vs AM/PM, leading zero suppression 09:12:34 vs 9:12:34,
hh:mm:ss vs hh:mm:ss.cc), and the possibility of the script running
through
midnight. IMHO, there are .exe utilities available to do this kind of
thing.
If you want to roll your own, I'd recommend doing it in some language that
has built-in date calculations.
/Al
OK, here's a demo of a batch routine (":HMS2S") that converts HH:MM:SS.CC
values into seconds, and subtracts the before and after values to show the
duration in seconds. it can handle the troublesome "08" and "09" values,
durations close to a full day, and will return a negative duration if the
start time is greater than the end time. Feel free to adapt to your
purposes.
/Al
@echo off
call:HMS2S _A %time%
ping -n 7 localhost
call:HMS2S _B %time%
set/a _D = _B - _A
echo/start %_A%
echo/stop %_B%
echo/duration %_D%
call:HMS2S _A 08:08:08
call:HMS2S _B 09:09:09
set/a _D = _B - _A
echo/start %_A%
echo/stop %_B%
echo/duration %_D%
call:HMS2S _A 09:09:09
call:HMS2S _B 08:08:08
set/a _D = _B - _A
echo/start %_A%
echo/stop %_B%
echo/duration %_D%
call:HMS2S _A 01:00:00
call:HMS2S _B 23:59:59
set/a _D = _B - _A
echo/start %_A%
echo/stop %_B%
echo/duration %_D%
pause
GOTO:EOF
:HMS2S
echo/time: %2
(set _time=%2)
(set _time=%_time:~0,8%)
for /f "tokens=1,2,3 delims=:" %%A in ("%_time%") do (
set __HH=1%%A
set __MM=1%%B
set __SS=1%%C
)
rem ::: octal fix for 08 and 09
set/a __HH = __HH - 100
set/a __MM = __MM - 100
set/a __SS = __SS - 100
set/a %1 = __SS + 60 * ( __MM + 24 * ( __HH ) )
GOTO:EOF
