time.c revision dafcb997e390efa4423883dafd100c975c4095d6
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews/*
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
4c713bf9401c2e55660bdcbba8d71032f482a330Tinderbox User * Copyright (C) 1998-2003 Internet Software Consortium.
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews *
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * Permission to use, copy, modify, and distribute this software for any
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * purpose with or without fee is hereby granted, provided that the above
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * copyright notice and this permission notice appear in all copies.
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews *
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * PERFORMANCE OF THIS SOFTWARE.
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews */
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews/* $Id: time.c,v 1.25 2004/03/05 05:09:25 marka Exp $ */
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <config.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <stdio.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <isc/string.h> /* Required for HP/UX (and others?) */
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <time.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <isc/region.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <isc/stdtime.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <isc/util.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <dns/result.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#include <dns/time.h>
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsstatic int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsisc_result_t
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsdns_time64_totext(isc_int64_t t, isc_buffer_t *target) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews struct tm tm;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews char buf[sizeof("YYYYMMDDHHMMSS")];
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews int secs;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews unsigned int l;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_region_t region;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews REQUIRE(t >= 0);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#define is_leap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#define year_secs(y) ((is_leap(y) ? 366 : 365 ) * 86400)
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#define month_secs(m,y) ((days[m] + ((m == 1 && is_leap(y)) ? 1 : 0 )) * 86400)
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_year = 70;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while ((secs = year_secs(tm.tm_year + 1900)) <= t) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews t -= secs;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_year++;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews if (tm.tm_year + 1900 > 9999)
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews return (ISC_R_RANGE);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_mon = 0;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while ((secs = month_secs(tm.tm_mon, tm.tm_year + 1900)) <= t) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews t -= secs;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_mon++;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_mday = 1;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while (86400 <= t) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews t -= 86400;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_mday++;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_hour = 0;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while (3600 <= t) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews t -= 3600;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_hour++;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_min = 0;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while (60 <= t) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews t -= 60;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_min++;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_sec = (int)t;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews /* yyyy mm dd HH MM SS */
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews snprintf(buf, sizeof(buf), "%04d%02d%02d%02d%02d%02d",
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews tm.tm_hour, tm.tm_min, tm.tm_sec);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_buffer_availableregion(target, &region);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews l = strlen(buf);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews if (l > region.length)
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews return (ISC_R_NOSPACE);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews memcpy(region.base, buf, l);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_buffer_add(target, l);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews return (ISC_R_SUCCESS);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews}
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsisc_result_t
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsdns_time32_totext(isc_uint32_t value, isc_buffer_t *target) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_stdtime_t now;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_int64_t start;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_int64_t base;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_int64_t t;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews /*
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * Adjust the time to the closest epoch. This should be changed
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * to use a 64-bit counterpart to isc_stdtime_get() if one ever
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * is defined, but even the current code is good until the year
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews * 2106.
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews */
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_stdtime_get(&now);
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews start = (isc_int64_t) now;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews start -= 0x7fffffff;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews base = 0;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews while ((t = (base + value)) < start) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews base += 0x80000000;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews base += 0x80000000;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews }
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews return (dns_time64_totext(t, target));
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews}
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsisc_result_t
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrewsdns_time64_fromtext(const char *source, isc_int64_t *target) {
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews int year, month, day, hour, minute, second;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews isc_int64_t value;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews int secs;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews int i;
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews#define RANGE(min, max, value) \
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews do { \
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews if (value < (min) || value > (max)) \
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews return (ISC_R_RANGE); \
91827e6fd3851a5fe129ef5409ff45833ca01a0eMark Andrews } while (0)
if (strlen(source) != 14U)
return (DNS_R_SYNTAX);
if (sscanf(source, "%4d%2d%2d%2d%2d%2d",
&year, &month, &day, &hour, &minute, &second) != 6)
return (DNS_R_SYNTAX);
RANGE(1970, 9999, year);
RANGE(1, 12, month);
RANGE(1, days[month - 1] +
((month == 2 && is_leap(year)) ? 1 : 0), day);
RANGE(0, 23, hour);
RANGE(0, 59, minute);
RANGE(0, 60, second); /* 60 == leap second. */
/*
* Calulate seconds since epoch.
*/
value = second + (60 * minute) + (3600 * hour) + ((day - 1) * 86400);
for (i = 0; i < (month - 1); i++)
value += days[i] * 86400;
if (is_leap(year) && month > 2)
value += 86400;
for (i = 1970; i < year; i++) {
secs = (is_leap(i) ? 366 : 365) * 86400;
value += secs;
}
*target = value;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_time32_fromtext(const char *source, isc_uint32_t *target) {
isc_int64_t value64;
isc_result_t result;
result = dns_time64_fromtext(source, &value64);
if (result != ISC_R_SUCCESS)
return (result);
*target = value64;
return (ISC_R_SUCCESS);
}