Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!unmvax!polyslo!ddurbin
From: ddurbin@polyslo.CalPoly.EDU (Daniel A. Durbin)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Date routines in turbo C 1.5.
Summary: fdate.c
Keywords: Consistency.
Message-ID: <11479@polyslo.CalPoly.EDU>
Date: 16 May 89 06:58:59 GMT
References: <1513@sdcc15.ucsd.edu>
Reply-To: ddurbin@polyslo.CalPoly.EDU (Daniel A. Durbin)
Distribution: usa
Organization: Cygnus Data Systems (805) 541-8505 (data)
Lines: 60

In article <1513@sdcc15.ucsd.edu> pa1343@sdcc15.ucsd.edu (John J. Marco) writes:
>I am trying to write an 'ls' program under DOS.  I am using Turbo C
>version 1.5 and I use findfirst() and findnext() to get the files.
>I am having a problem with file dates.  find... () returns a structure
>ffblk such that the time is split into (int ff_ftime, int ff_fdate);
>These functions use the DOS interrupt for finding the files.
>Does anybody know of any routines for converting these integers to 
>UNIX format?  If not, could somebody who knows please email me and tell
>me how exactly these integers tell the time.  Turbo C does not seem 
>to have any conversion routines and when I print out the integers
>I get meaningless numbers which do not look like dates.
>I appreciate any and all help.
>

I whipped this out real quick and it shows how to decode the fdate
and ftime returned by the DOS interrupt used by the TurboC findfirst()
and findnext() functions.  I tested it and it does the same thing as
a DOS dir command.

BEGIN -- cut here -- cut here
--------------------
/* fdate.c by Daniel Durbin  05/15/89 */
/* for TurboC v1.5 */

#include <stdio.h>
#include <dos.h>
#include <dir.h>

void main(int argc, char *argv[])
{
	char s1[9], s2[9];
	struct ffblk ffblk;
	int result;

	if (argc < 2) return;
	result = findfirst(argv[1], &ffblk, FA_ARCH);
	while (result != -1) {
		sprintf(s1, "%02d/%02d/%02d",
			(ffblk.ff_fdate & 0x01e0) / 32,
			(ffblk.ff_fdate & 0x001f),
			(ffblk.ff_fdate & 0xfe00) / 512 + 80
		);
		sprintf(s2, "%02d:%02d:%02d",
			(ffblk.ff_ftime & 0xfc00) / 2048,
			(ffblk.ff_ftime & 0x07e0) / 32,
			(ffblk.ff_ftime & 0x001f)
		);
		printf("%-12s  %6lu  %s  %s\n",
			ffblk.ff_name, ffblk.ff_fsize, s1, s2
		);
		result = findnext(&ffblk);
	}
}
--------------
END -- cut here -- cut here

	Daniel Durbin___________________________________________________
	SysOp: Cygnus X-1 BBS		| CIS: 73447,1744
	(805) 541-8505 (data)		| GEnie: D.DURBIN
	EL major at PolySlo		| ddurbin@polyslo.CalPoly.EDU