17c478bd9Sstevel@tonic-gate /*
2*9525b14bSRao Shoaib  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
37c478bd9Sstevel@tonic-gate  * Copyright (c) 1999 by Internet Software Consortium.
47c478bd9Sstevel@tonic-gate  *
57c478bd9Sstevel@tonic-gate  * Permission to use, copy, modify, and distribute this software for any
67c478bd9Sstevel@tonic-gate  * purpose with or without fee is hereby granted, provided that the above
77c478bd9Sstevel@tonic-gate  * copyright notice and this permission notice appear in all copies.
87c478bd9Sstevel@tonic-gate  *
9*9525b14bSRao Shoaib  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10*9525b14bSRao Shoaib  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11*9525b14bSRao Shoaib  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
12*9525b14bSRao Shoaib  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13*9525b14bSRao Shoaib  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14*9525b14bSRao Shoaib  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15*9525b14bSRao Shoaib  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
167c478bd9Sstevel@tonic-gate  */
177c478bd9Sstevel@tonic-gate 
187c478bd9Sstevel@tonic-gate #include "port_before.h"
197c478bd9Sstevel@tonic-gate 
207c478bd9Sstevel@tonic-gate #include <arpa/nameser.h>
217c478bd9Sstevel@tonic-gate 
227c478bd9Sstevel@tonic-gate #include <ctype.h>
237c478bd9Sstevel@tonic-gate #include <errno.h>
247c478bd9Sstevel@tonic-gate #include <stdio.h>
257c478bd9Sstevel@tonic-gate #include <string.h>
267c478bd9Sstevel@tonic-gate #include <time.h>
277c478bd9Sstevel@tonic-gate 
287c478bd9Sstevel@tonic-gate #include "port_after.h"
297c478bd9Sstevel@tonic-gate 
307c478bd9Sstevel@tonic-gate #ifdef SPRINTF_CHAR
317c478bd9Sstevel@tonic-gate # define SPRINTF(x) strlen(sprintf/**/x)
327c478bd9Sstevel@tonic-gate #else
337c478bd9Sstevel@tonic-gate # define SPRINTF(x) ((size_t)sprintf x)
347c478bd9Sstevel@tonic-gate #endif
357c478bd9Sstevel@tonic-gate 
367c478bd9Sstevel@tonic-gate /* Forward. */
377c478bd9Sstevel@tonic-gate 
387c478bd9Sstevel@tonic-gate static int	datepart(const char *, int, int, int, int *);
397c478bd9Sstevel@tonic-gate 
407c478bd9Sstevel@tonic-gate /* Public. */
417c478bd9Sstevel@tonic-gate 
42*9525b14bSRao Shoaib /*%
43*9525b14bSRao Shoaib  * Convert a date in ASCII into the number of seconds since
44*9525b14bSRao Shoaib  * 1 January 1970 (GMT assumed).  Format is yyyymmddhhmmss, all
45*9525b14bSRao Shoaib  * digits required, no spaces allowed.
46*9525b14bSRao Shoaib  */
477c478bd9Sstevel@tonic-gate 
487c478bd9Sstevel@tonic-gate u_int32_t
ns_datetosecs(const char * cp,int * errp)497c478bd9Sstevel@tonic-gate ns_datetosecs(const char *cp, int *errp) {
507c478bd9Sstevel@tonic-gate 	struct tm time;
517c478bd9Sstevel@tonic-gate 	u_int32_t result;
527c478bd9Sstevel@tonic-gate 	int mdays, i;
537c478bd9Sstevel@tonic-gate 	static const int days_per_month[12] =
547c478bd9Sstevel@tonic-gate 		{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
557c478bd9Sstevel@tonic-gate 
56*9525b14bSRao Shoaib 	if (strlen(cp) != 14U) {
577c478bd9Sstevel@tonic-gate 		*errp = 1;
587c478bd9Sstevel@tonic-gate 		return (0);
597c478bd9Sstevel@tonic-gate 	}
607c478bd9Sstevel@tonic-gate 	*errp = 0;
617c478bd9Sstevel@tonic-gate 
627c478bd9Sstevel@tonic-gate 	memset(&time, 0, sizeof time);
637c478bd9Sstevel@tonic-gate 	time.tm_year  = datepart(cp +  0, 4, 1990, 9999, errp) - 1900;
647c478bd9Sstevel@tonic-gate 	time.tm_mon   = datepart(cp +  4, 2,   01,   12, errp) - 1;
657c478bd9Sstevel@tonic-gate 	time.tm_mday  = datepart(cp +  6, 2,   01,   31, errp);
667c478bd9Sstevel@tonic-gate 	time.tm_hour  = datepart(cp +  8, 2,   00,   23, errp);
677c478bd9Sstevel@tonic-gate 	time.tm_min   = datepart(cp + 10, 2,   00,   59, errp);
687c478bd9Sstevel@tonic-gate 	time.tm_sec   = datepart(cp + 12, 2,   00,   59, errp);
69*9525b14bSRao Shoaib 	if (*errp)		/*%< Any parse errors? */
707c478bd9Sstevel@tonic-gate 		return (0);
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate 	/*
737c478bd9Sstevel@tonic-gate 	 * OK, now because timegm() is not available in all environments,
747c478bd9Sstevel@tonic-gate 	 * we will do it by hand.  Roll up sleeves, curse the gods, begin!
757c478bd9Sstevel@tonic-gate 	 */
767c478bd9Sstevel@tonic-gate 
777c478bd9Sstevel@tonic-gate #define SECS_PER_DAY    ((u_int32_t)24*60*60)
787c478bd9Sstevel@tonic-gate #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
797c478bd9Sstevel@tonic-gate 
80*9525b14bSRao Shoaib 	result  = time.tm_sec;				/*%< Seconds */
81*9525b14bSRao Shoaib 	result += time.tm_min * 60;			/*%< Minutes */
82*9525b14bSRao Shoaib 	result += time.tm_hour * (60*60);		/*%< Hours */
83*9525b14bSRao Shoaib 	result += (time.tm_mday - 1) * SECS_PER_DAY;	/*%< Days */
847c478bd9Sstevel@tonic-gate 	/* Months are trickier.  Look without leaping, then leap */
857c478bd9Sstevel@tonic-gate 	mdays = 0;
867c478bd9Sstevel@tonic-gate 	for (i = 0; i < time.tm_mon; i++)
877c478bd9Sstevel@tonic-gate 		mdays += days_per_month[i];
88*9525b14bSRao Shoaib 	result += mdays * SECS_PER_DAY;			/*%< Months */
897c478bd9Sstevel@tonic-gate 	if (time.tm_mon > 1 && isleap(1900+time.tm_year))
90*9525b14bSRao Shoaib 		result += SECS_PER_DAY;		/*%< Add leapday for this year */
917c478bd9Sstevel@tonic-gate 	/* First figure years without leapdays, then add them in.  */
927c478bd9Sstevel@tonic-gate 	/* The loop is slow, FIXME, but simple and accurate.  */
93*9525b14bSRao Shoaib 	result += (time.tm_year - 70) * (SECS_PER_DAY*365); /*%< Years */
947c478bd9Sstevel@tonic-gate 	for (i = 70; i < time.tm_year; i++)
957c478bd9Sstevel@tonic-gate 		if (isleap(1900+i))
96*9525b14bSRao Shoaib 			result += SECS_PER_DAY; /*%< Add leapday for prev year */
977c478bd9Sstevel@tonic-gate 	return (result);
987c478bd9Sstevel@tonic-gate }
997c478bd9Sstevel@tonic-gate 
1007c478bd9Sstevel@tonic-gate /* Private. */
1017c478bd9Sstevel@tonic-gate 
102*9525b14bSRao Shoaib /*%
1037c478bd9Sstevel@tonic-gate  * Parse part of a date.  Set error flag if any error.
1047c478bd9Sstevel@tonic-gate  * Don't reset the flag if there is no error.
1057c478bd9Sstevel@tonic-gate  */
1067c478bd9Sstevel@tonic-gate static int
datepart(const char * buf,int size,int min,int max,int * errp)1077c478bd9Sstevel@tonic-gate datepart(const char *buf, int size, int min, int max, int *errp) {
1087c478bd9Sstevel@tonic-gate 	int result = 0;
1097c478bd9Sstevel@tonic-gate 	int i;
1107c478bd9Sstevel@tonic-gate 
1117c478bd9Sstevel@tonic-gate 	for (i = 0; i < size; i++) {
1127c478bd9Sstevel@tonic-gate 		if (!isdigit((unsigned char)(buf[i])))
1137c478bd9Sstevel@tonic-gate 			*errp = 1;
1147c478bd9Sstevel@tonic-gate 		result = (result * 10) + buf[i] - '0';
1157c478bd9Sstevel@tonic-gate 	}
1167c478bd9Sstevel@tonic-gate 	if (result < min)
1177c478bd9Sstevel@tonic-gate 		*errp = 1;
1187c478bd9Sstevel@tonic-gate 	if (result > max)
1197c478bd9Sstevel@tonic-gate 		*errp = 1;
1207c478bd9Sstevel@tonic-gate 	return (result);
1217c478bd9Sstevel@tonic-gate }
122*9525b14bSRao Shoaib 
123*9525b14bSRao Shoaib /*! \file */
124