* Original from Michael Stapleton at 3:711/934.33

Hi Paul,

On Dec 09 13:48, 1996, Michael Stapleton of 3:711/934.33 wrote:

PE>> Probably would have been more useful sending me mktime() itself,

MS> time_t mktime(struct tm *ptm)
MS> {
MS>     long day;
MS>     time_t sec;

MS>     day = 365 * (ptm->tm_year - 70) + ptm->tm_yday;

Ok, you can stop laughing now.  :) At the very least, I certainly
shouldn't be using tm_yday!  ATM I'm using the following code, but I
think I should take your advice & use the PDCLIB (?) routines.

/* M K T I M E */
#include 
#include 
#include 

static long isleap(long year)
{
    return (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0);
}

time_t mktime(struct tm *ptm)
{
    long year, mon, day;
    time_t sec;

    /* Let's make it easy & presume canonical form for starters :) */
    year = ptm->tm_year;
    day = ptm->tm_mday;
    day += 365 * (year - 70);
    day += (year - 69) / 4;    /* Leap days since 1-Jan-1970 */

    mon = ptm->tm_mon;
    day += ((3055 * (mon + 3)) / 100) - 92;
    if (mon > 1)
        day += isleap(year) - 2;

    sec = 86400 * day + 3600 * (ptm->tm_hour + !!daylight) +
        60 * ptm->tm_min + ptm->tm_sec + timezone;

    return sec;
}

/* * * * * * * * * * * * * * */

I've now got Ctrl-Alt keys working in MsgEd now (substituting for
Alt keys) and it's much easier to use.

Michael Stapleton of Graphic Bits
@EOT:

--- Msged/AM 4.00