| /* |
| * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") |
| * Copyright (c) 1999 by Internet Software Consortium. |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* Import. */ |
| |
| #include <arpa/nameser.h> |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <time.h> |
| |
| #define SPRINTF(x) ((size_t)sprintf x) |
| |
| /* Forward. */ |
| |
| static int datepart(const char *, int, int, int, int *); |
| |
| /* Public. */ |
| |
| /*% |
| * Convert a date in ASCII into the number of seconds since |
| * 1 January 1970 (GMT assumed). Format is yyyymmddhhmmss, all |
| * digits required, no spaces allowed. |
| */ |
| |
| uint32_t |
| ns_datetosecs(const char *cp, int *errp) { |
| struct tm time; |
| uint32_t result; |
| int mdays, i; |
| static const int days_per_month[12] = |
| {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; |
| |
| if (strlen(cp) != 14U) { |
| *errp = 1; |
| return (0); |
| } |
| *errp = 0; |
| |
| memset(&time, 0, sizeof time); |
| time.tm_year = datepart(cp + 0, 4, 1990, 9999, errp) - 1900; |
| time.tm_mon = datepart(cp + 4, 2, 01, 12, errp) - 1; |
| time.tm_mday = datepart(cp + 6, 2, 01, 31, errp); |
| time.tm_hour = datepart(cp + 8, 2, 00, 23, errp); |
| time.tm_min = datepart(cp + 10, 2, 00, 59, errp); |
| time.tm_sec = datepart(cp + 12, 2, 00, 59, errp); |
| if (*errp) /*%< Any parse errors? */ |
| return (0); |
| |
| /* |
| * OK, now because timegm() is not available in all environments, |
| * we will do it by hand. Roll up sleeves, curse the gods, begin! |
| */ |
| |
| #define SECS_PER_DAY ((uint32_t)24*60*60) |
| #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) |
| |
| result = time.tm_sec; /*%< Seconds */ |
| result += time.tm_min * 60; /*%< Minutes */ |
| result += time.tm_hour * (60*60); /*%< Hours */ |
| result += (time.tm_mday - 1) * SECS_PER_DAY; /*%< Days */ |
| /* Months are trickier. Look without leaping, then leap */ |
| mdays = 0; |
| for (i = 0; i < time.tm_mon; i++) |
| mdays += days_per_month[i]; |
| result += mdays * SECS_PER_DAY; /*%< Months */ |
| if (time.tm_mon > 1 && isleap(1900+time.tm_year)) |
| result += SECS_PER_DAY; /*%< Add leapday for this year */ |
| /* First figure years without leapdays, then add them in. */ |
| /* The loop is slow, FIXME, but simple and accurate. */ |
| result += (time.tm_year - 70) * (SECS_PER_DAY*365); /*%< Years */ |
| for (i = 70; i < time.tm_year; i++) |
| if (isleap(1900+i)) |
| result += SECS_PER_DAY; /*%< Add leapday for prev year */ |
| return (result); |
| } |
| |
| /* Private. */ |
| |
| /*% |
| * Parse part of a date. Set error flag if any error. |
| * Don't reset the flag if there is no error. |
| */ |
| static int |
| datepart(const char *buf, int size, int min, int max, int *errp) { |
| int result = 0; |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| if (!isdigit((unsigned char)(buf[i]))) |
| *errp = 1; |
| result = (result * 10) + buf[i] - '0'; |
| } |
| if (result < min) |
| *errp = 1; |
| if (result > max) |
| *errp = 1; |
| return (result); |
| } |
| |
| /*! \file */ |
