This is deltime.c in view mode; [Download] [Up]
/* deltime.c - subtract date/times
ver date who remarks
--- ------- --- -------------------------------------------------------------
01B 15nov86 JP Modified to use twsubtract().
01A 08nov86 JP Written.
Copyright (C) 1986 by Jef Poskanzer. Permission to use, copy,
modify, and distribute this software and its documentation for any
purpose and without fee is hereby granted, provided that this copyright
notice appear in all copies and in all supporting documentation. No
representation is made about the suitability of this software for any
purpose. It is provided "as is" without express or implied warranty.
*/
static char copyright[] = "\nCopyright (C) 1986 by Jef Poskanzer.\n";
#include "tws.h"
#include <stdio.h>
#define SECSPERMINUTE 60
#define SECSPERHOUR (60 * SECSPERMINUTE)
#define SECSPERDAY (24 * SECSPERHOUR)
main( argc, argv )
int argc;
char *argv[];
{
struct tws tws1, tws2, *twp;
long delta, days, hours, minutes, secs;
char *illdt = "illegal date/time: %s\n";
if ( argc == 2 )
{
twp = dparsetime( argv[1] );
if ( twp == NULL || twp -> tw_flags & TW_JUNK )
{
fprintf( stderr, illdt, argv[1] );
exit( 1 );
}
twscopy( &tws1, twp );
twscopy( &tws2, dtwstime( ) );
}
else if ( argc == 3 )
{
twp = dparsetime( argv[1] );
if ( twp == NULL || twp -> tw_flags & TW_JUNK )
{
fprintf( stderr, illdt, argv[1] );
exit( 1 );
}
twscopy( &tws1, twp );
twp = dparsetime( argv[2] );
if ( twp == NULL || twp -> tw_flags & TW_JUNK )
{
fprintf( stderr, illdt, argv[2] );
exit( 1 );
}
twscopy( &tws2, twp );
}
else
{
fprintf( stderr, "usage: %s <time> [ <time2> ]\n", argv[0] );
exit( 1 );
}
delta = twsubtract( &tws2, &tws1 );
if ( delta < 0 )
{
printf( "-" );
delta = -delta;
}
days = delta / SECSPERDAY;
delta = delta - days * SECSPERDAY;
hours = delta / SECSPERHOUR;
delta = delta - hours * SECSPERHOUR;
minutes = delta / SECSPERMINUTE;
delta = delta - minutes * SECSPERMINUTE;
secs = delta;
printf( "%ld %2ld:%02ld:%02ld\n", days, hours, minutes, secs );
exit( 0 );
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.