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/*
* Copyright (c) 1998,2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
/*
* 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
#ifdef __STDC__
static int lookup(char *);
static time_t emitl(struct tm *);
#else
static int lookup();
static time_t emitl();
#endif
time_t
unctime(str)
char *str;
{
struct tm then;
char dbuf[30];
/* Definition of ctime(3) is 24 characters + newline + NUL */
(void) strncpy(dbuf, str, 24);
dbuf[24] = '\0';
dbuf[E_MONTH+3] = '\0';
then.tm_mon = lookup(&dbuf[E_MONTH]);
if (then.tm_mon < 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;
{
char *cp, *cp2;
for (cp = months, cp2 = str; *cp != 0; cp += 3)
if (strncmp(cp, cp2, 3) == 0)
/* LINTED ptr arith will give < INT_MAX result */
return (((int)(cp-months)) / 3);
return (-1);
}
/*
* Routine to convert a localtime(3) format date back into
* a system format date.
*/
static time_t
emitl(dp)
struct tm *dp;
{
dp->tm_isdst = -1;
return (mktime(dp));
}
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