unixtodos

From RAD Studio
Jump to: navigation, search

Go Up to dos.h Index

Header File

dos.h

Category

Time and Date Routines

Prototype

void unixtodos(long time, struct date *d, struct time *t);

Description

Converts date and time from UNIX to DOS format.

unixtodos converts the UNIX-format time given in time to DOS format and fills in the date and time structures pointed to by d and t.

time must not represent a calendar time earlier than Jan. 1, 1980 00:00:00.

Return Value

None.

Example

#include <stdio.h>
#include <dos.h>
char *month[] = {"---", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
#define SECONDS_PER_DAY 86400L  /* the number of seconds in one day */
struct date dt;
struct time tm;
int main(void)
{
   unsigned long val;
/* get today's date and time */
   getdate(&dt);
   gettime(&tm);
   printf("today is %d %s %d\n", dt.da_day, month[dt.da_mon], dt.da_year);
/*convert date and time to unix format (num of seconds since Jan 1, 1970*/
   val = dostounix(&dt, &tm);
/* subtract 42 days worth of seconds */
   val -= (SECONDS_PER_DAY * 42);
/* convert back to dos time and date */
   unixtodos(val, &dt, &tm);
   printf("42 days ago it was %d %s %d\n",
          dt.da_day, month[dt.da_mon], dt.da_year);
   return 0;
}

Portability

POSIX Win32 ANSI C ANSI C++

+