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bd8757b313
2000-12-08 Alexandre Petit-Bianco <apbianco@cygnus.com>
* fastjar: Imported.
From-SVN: r38145
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/*
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dostime.c - routines for converting UNIX time to MS-DOS time.
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Borrowed from Info-zip's unzip
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Copyright (C) 1999 Bryan Burns
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* $Id: dostime.c,v 1.1.1.1 1999/12/06 03:09:12 toast Exp $
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$Log: dostime.c,v $
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Revision 1.1.1.1 1999/12/06 03:09:12 toast
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initial checkin..
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Revision 1.6 1999/05/10 08:32:26 burnsbr
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added dos2unixtime
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Revision 1.5 1999/04/27 10:03:50 burnsbr
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configure support
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Revision 1.4 1999/04/26 21:55:19 burnsbr
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switched from sys/time.h to time.h for better portability
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Revision 1.3 1999/04/20 08:54:30 burnsbr
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added GPL comment
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Revision 1.2 1999/04/20 05:10:53 burnsbr
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added RCS tags
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*/
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#include "config.h"
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#ifdef TM_IN_SYS_TIME
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#include <sys/time.h>
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#else
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#include <time.h>
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#endif
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#include "dostime.h"
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static char rcsid[] = "$Id: dostime.c,v 1.1.1.1 1999/12/06 03:09:12 toast Exp $";
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/*
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Copyright (C) 1990-1997 Mark Adler, Richard B. Wales, Jean-loup Gailly,
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Kai Uwe Rommel, Onno van der Linden and Igor Mandrichenko.
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Permission is granted to any individual or institution to use, copy, or
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redistribute this software so long as all of the original files are included,
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that it is not sold for profit, and that this copyright notice is retained.
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*/
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time_t dos2unixtime(dostime)
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unsigned long dostime; /* DOS time to convert */
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/* Return the Unix time_t value (GMT/UTC time) for the DOS format (local)
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* time dostime, where dostime is a four byte value (date in most
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* significant word, time in least significant word), see dostime()
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* function.
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*/
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{
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struct tm *t; /* argument for mktime() */
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time_t clock = time(NULL);
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t = localtime(&clock);
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t->tm_isdst = -1; /* let mktime() determine if DST is in effect */
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/* Convert DOS time to UNIX time_t format */
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t->tm_sec = (((int)dostime) << 1) & 0x3e;
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t->tm_min = (((int)dostime) >> 5) & 0x3f;
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t->tm_hour = (((int)dostime) >> 11) & 0x1f;
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t->tm_mday = (int)(dostime >> 16) & 0x1f;
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t->tm_mon = ((int)(dostime >> 21) & 0x0f) - 1;
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t->tm_year = ((int)(dostime >> 25) & 0x7f) + 80;
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return mktime(t);
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}
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unsigned long dostime(y, n, d, h, m, s)
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int y; /* year */
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int n; /* month */
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int d; /* day */
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int h; /* hour */
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int m; /* minute */
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int s; /* second */
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/* Convert the date y/n/d and time h:m:s to a four byte DOS date and
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time (date in high two bytes, time in low two bytes allowing magnitude
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comparison). */
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{
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return y < 1980 ? dostime(1980, 1, 1, 0, 0, 0) :
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(((unsigned long)y - 1980) << 25) | ((unsigned long)n << 21) |
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((unsigned long)d << 16) | ((unsigned long)h << 11) |
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((unsigned long)m << 5) | ((unsigned long)s >> 1);
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}
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unsigned long unix2dostime(t)
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time_t *t; /* unix time to convert */
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/* Return the Unix time t in DOS format, rounded up to the next two
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second boundary. */
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{
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time_t t_even;
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struct tm *s; /* result of localtime() */
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t_even = (*t + 1) & (~1); /* Round up to even seconds. */
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s = localtime(&t_even); /* Use local time since MSDOS does. */
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return dostime(s->tm_year + 1900, s->tm_mon + 1, s->tm_mday,
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s->tm_hour, s->tm_min, s->tm_sec);
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}
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