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/* $OpenBSD: rcstime.c,v 1.6 2016/08/26 09:02:54 guenther Exp $ */ |
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/* |
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* Copyright (c) 2006 Joris Vink <joris@openbsd.org> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <err.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include "rcs.h" |
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void |
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rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb) |
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{ |
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int tzone; |
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int pos; |
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char *h, *m; |
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const char *errstr; |
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struct tm *ltb; |
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time_t now; |
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if (!strcmp(tz, "LT")) { |
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now = mktime(&rdp->rd_date); |
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ltb = localtime(&now); |
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ltb->tm_hour += ((int)ltb->tm_gmtoff/3600); |
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memcpy(tb, ltb, sizeof(*tb)); |
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} else { |
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pos = 0; |
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switch (*tz) { |
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case '-': |
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break; |
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case '+': |
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pos = 1; |
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break; |
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default: |
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errx(1, "%s: not a known time zone", tz); |
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} |
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h = (tz + 1); |
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if ((m = strrchr(tz, ':')) != NULL) |
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*(m++) = '\0'; |
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memcpy(tb, &rdp->rd_date, sizeof(*tb)); |
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tzone = strtonum(h, -23, 23, &errstr); |
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if (errstr) |
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errx(1, "%s: not a known time zone", tz); |
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if (pos) { |
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tb->tm_hour += tzone; |
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tb->tm_gmtoff += (tzone * 3600); |
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} else { |
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tb->tm_hour -= tzone; |
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tb->tm_gmtoff -= (tzone * 3600); |
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} |
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if ((tb->tm_hour >= 24) || (tb->tm_hour <= -24)) |
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tb->tm_hour = 0; |
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if (m != NULL) { |
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tzone = strtonum(m, 0, 59, &errstr); |
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if (errstr) |
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errx(1, "%s: not a known minute", m); |
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if ((tb->tm_min + tzone) >= 60) { |
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tb->tm_hour++; |
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tb->tm_min -= (60 - tzone); |
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} else |
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tb->tm_min += tzone; |
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tb->tm_gmtoff += (tzone*60); |
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} |
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} |
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} |