mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-02 04:13:39 +00:00
158 lines
3.9 KiB
C
158 lines
3.9 KiB
C
/*-
|
|
* Copyright (c) 1980, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)unctime.c 8.1 (Berkeley) 6/5/93";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#ifdef __STDC__
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#ifndef __P
|
|
#include <sys/cdefs.h>
|
|
#endif
|
|
|
|
/*
|
|
* Convert a ctime(3) format string into a system format date.
|
|
* Return the date thus calculated.
|
|
*
|
|
* Return -1 if the string is not in ctime format.
|
|
*/
|
|
|
|
/*
|
|
* Offsets into the ctime string to various parts.
|
|
*/
|
|
|
|
#define E_MONTH 4
|
|
#define E_DAY 8
|
|
#define E_HOUR 11
|
|
#define E_MINUTE 14
|
|
#define E_SECOND 17
|
|
#define E_YEAR 20
|
|
|
|
static int dcmp __P((struct tm *, struct tm *));
|
|
static time_t emitl __P((struct tm *));
|
|
static int lookup __P((char *));
|
|
|
|
|
|
time_t
|
|
unctime(str)
|
|
char *str;
|
|
{
|
|
struct tm then;
|
|
char dbuf[26];
|
|
|
|
(void) strncpy(dbuf, str, sizeof(dbuf) - 1);
|
|
dbuf[sizeof(dbuf) - 1] = '\0';
|
|
dbuf[E_MONTH+3] = '\0';
|
|
if ((then.tm_mon = lookup(&dbuf[E_MONTH])) < 0)
|
|
return (-1);
|
|
then.tm_mday = atoi(&dbuf[E_DAY]);
|
|
then.tm_hour = atoi(&dbuf[E_HOUR]);
|
|
then.tm_min = atoi(&dbuf[E_MINUTE]);
|
|
then.tm_sec = atoi(&dbuf[E_SECOND]);
|
|
then.tm_year = atoi(&dbuf[E_YEAR]) - 1900;
|
|
return(emitl(&then));
|
|
}
|
|
|
|
static char months[] =
|
|
"JanFebMarAprMayJunJulAugSepOctNovDec";
|
|
|
|
static int
|
|
lookup(str)
|
|
char *str;
|
|
{
|
|
register char *cp, *cp2;
|
|
|
|
for (cp = months, cp2 = str; *cp != '\0'; cp += 3)
|
|
if (strncmp(cp, cp2, 3) == 0)
|
|
return((cp-months) / 3);
|
|
return(-1);
|
|
}
|
|
/*
|
|
* Routine to convert a localtime(3) format date back into
|
|
* a system format date.
|
|
*
|
|
* Use a binary search.
|
|
*/
|
|
|
|
static time_t
|
|
emitl(dp)
|
|
struct tm *dp;
|
|
{
|
|
time_t conv;
|
|
register int i, bit;
|
|
struct tm dcopy;
|
|
|
|
dcopy = *dp;
|
|
dp = &dcopy;
|
|
conv = 0;
|
|
for (i = 30; i >= 0; i--) {
|
|
bit = 1 << i;
|
|
conv |= bit;
|
|
if (dcmp(localtime(&conv), dp) > 0)
|
|
conv &= ~bit;
|
|
}
|
|
return(conv);
|
|
}
|
|
|
|
/*
|
|
* Compare two localtime dates, return result.
|
|
*/
|
|
|
|
#define DECIDE(a) \
|
|
if (dp->a > dp2->a) \
|
|
return(1); \
|
|
if (dp->a < dp2->a) \
|
|
return(-1)
|
|
|
|
static int
|
|
dcmp(dp, dp2)
|
|
register struct tm *dp, *dp2;
|
|
{
|
|
|
|
DECIDE(tm_year);
|
|
DECIDE(tm_mon);
|
|
DECIDE(tm_mday);
|
|
DECIDE(tm_hour);
|
|
DECIDE(tm_min);
|
|
DECIDE(tm_sec);
|
|
return(0);
|
|
}
|