check_24.c

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 /*
    check_24
    If the hour is reported as 24 (instead of 00 ), add in one second
    to change to next day,
   
 
                                                                        */
#define _POSIX_SOURCE
#include <time.h>                 
 
static int mdays[12] = { 0,31,59,90,120,151,181,212,243,273,304,334 } ;
 
long check_24(year, month, day, hour, minute, second)
short int *year, *month, *day, *hour, *minute, *second;
{
int ndays ;
long times ;
 
  time_t cal_time;
  struct tm *bd_time;
  
 
 
 
/*  COMPUTE TIME IN SECONDS SINCE JAN 1, 1980 00:00:00  */
 
    /* number of seconds for years */
 
    times = 31536000L * (long)(*year - 1970) ; 
 
    times += 86400L * (long)((*year - 1969)/4);    /* account for leap years */
 
    /* number of seconds for days in year */
    ndays = mdays[*month-1] + *day - 1 ;
    times += 86400L * (long)ndays ;
 
    /* take into account leap years */
    if ( *year % 4 == 0 && *year % 100 != 0 || *year % 400 == 0 ) 
            if (*month > 2)
                  times += 86400L ;
 
    /* now add hours, minutes and seconds */
    times += 3600L * *hour ;
    times += 60L * *minute ;
    times += *second ;
 
/* now add one second to kick past 24 hours */
   times++;
   bd_time = gmtime(&times);
 
 *year =   bd_time->tm_year + 1900; 
 *month  =   bd_time->tm_mon +1;
 *day  =   bd_time->tm_mday;
 *hour =   bd_time->tm_hour;
 *minute  =   bd_time->tm_min; 
 *second  =   bd_time->tm_sec; 
 *second  = 0;
 
 
 
 
 
 
   
/*  RETURN THE TIME IN SECONDS  */
    return(times) ;
}