HP C/iX Library Reference Manual (30026-90004)

Chapter 5 261

HP C/iX Library Function Descriptions

mktime

By default, mktime adjusts the returned value to the Eastern Standard Time (EST) zone.

You may override this default behavior by using the MPE/iX command SETVAR TZ name.

Time zone names, and the format of TZTAB.LIB.SYS ﬁle containing time zone offsets from

GMT are listed in appendix A, "Time Zones."

Example

What day of the week is July 4, 2001?

#include <stdio.h>

$include <time.h>

static const char *const wday[] = {

"Sunday", "Monday", "Tuesday",

"Wednesday", "Thursday", "Friday",

"Saturday", "-unknown"

};

struct tm time_str;

time_str.tm_year = 2001 - 1900;

time_str.tm_mon =7-1;

time_str.tm_mday = 4;

time_str.tm_hour = 0;

time_str.tm_min = 0;

time_str.tm_sec = 1;

time_str.tm_isdst = -1;

if (mktime(time_str) == -1)

time_str.tm_wday = 7;

printf("%s\n", wday[time_str.tm_wday]);