Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sourceware.cygnus.com Delivered-To: mailing list cygwin@sourceware.cygnus.com Message-ID: <38AAEDC1.B23C48C@swi.com> Date: Wed, 16 Feb 2000 13:34:42 -0500 From: Paul Berrevoets Organization: Halcyon Inc. X-Mailer: Mozilla 4.7 [en] (WinNT; U) X-Accept-Language: en MIME-Version: 1.0 To: Songyu Lu CC: cygwin@sourceware.cygnus.com Subject: Re: Timing Functions on Cygwin References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit This has been fixed in the snapshots since around June of last year. -- Regards, Paul Songyu Lu wrote: > I have trouble with timing functions(time(), localtime(), > tzset(), mktime()) on Cygwin using gcc compiler. > > I wrote a simple program attached. > > It basicly converts the value from time()(call it A) to tm structure, then > converts this tm back to a value in seconds using tzset() and > mktime()(call it B). A and B are supposed to be equal. Cygwin gives me a > 6 hours difference(I am in Central Time Zone), while other systems(I tried > IRIX, Linux, Sun OS) work well. > > Hope you can give me a hint! > > Raymond > NCSA > > ------------------------------------------------------------------------ > /* test timing: > * get local time from time() and localtime(), > * convert to time in seconds by mktime(), > * supposed to get same values. > */ > #include > #include > #include > > main() > { > struct tm *tm; > time_t now, the_time; > > /*get current time in seconds.*/ > now = time(0); > /* convert to tm structure */ > tm = localtime(&now); > > /*adjust to local time zone and daylight saving time */ > tzset(); > /*convert tm structure to time in seconds. Cygwin returns Greenwich time > here while other systems return local time. */ > the_time = mktime(tm); > > fprintf(stderr, "tm->tm_isdst=%d\n", tm->tm_isdst); > fprintf(stderr, "now=%d,\nthe_time=%d,\nnow - the_time=%d\n", now, the_time, > (now-the_time)); > > return 0; > } > > ------------------------------------------------------------------------ > -- > Want to unsubscribe from this list? > Send a message to cygwin-unsubscribe@sourceware.cygnus.com -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com