1 /* $OpenBSD: rcstime.c,v 1.3 2007/02/27 07:59:13 xsa Exp $ */ 2 /* 3 * Copyright (c) 2006 Joris Vink <joris@openbsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 16 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 17 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 18 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <err.h> 28 #include <stdlib.h> 29 #include <string.h> 30 31 #include "rcs.h" 32 33 void 34 rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb) 35 { 36 int tzone; 37 int pos; 38 char *h, *m; 39 struct tm *ltb; 40 time_t now; 41 42 if (!strcmp(tz, "LT")) { 43 now = mktime(&rdp->rd_date); 44 ltb = localtime(&now); 45 ltb->tm_hour += ((int)ltb->tm_gmtoff/3600); 46 memcpy(tb, ltb, sizeof(*tb)); 47 } else { 48 pos = 0; 49 switch (*tz) { 50 case '-': 51 break; 52 case '+': 53 pos = 1; 54 break; 55 default: 56 errx(1, "%s: not a known time zone", tz); 57 } 58 59 h = (tz + 1); 60 if ((m = strrchr(tz, ':')) != NULL) 61 *(m++) = '\0'; 62 63 memcpy(tb, &rdp->rd_date, sizeof(*tb)); 64 65 tzone = atoi(h); 66 if ((tzone >= 24) && (tzone <= -24)) 67 errx(1, "%s: not a known time zone", tz); 68 69 if (pos) { 70 tb->tm_hour += tzone; 71 tb->tm_gmtoff += (tzone * 3600); 72 } else { 73 tb->tm_hour -= tzone; 74 tb->tm_gmtoff -= (tzone * 3600); 75 } 76 77 if ((tb->tm_hour >= 24) || (tb->tm_hour <= -24)) 78 tb->tm_hour = 0; 79 80 if (m != NULL) { 81 tzone = atoi(m); 82 if (tzone >= 60) 83 errx(1, "%s: not a known time zone", tz); 84 85 if ((tb->tm_min + tzone) >= 60) { 86 tb->tm_hour++; 87 tb->tm_min -= (60 - tzone); 88 } else 89 tb->tm_min += tzone; 90 91 tb->tm_gmtoff += (tzone*60); 92 } 93 } 94 } 95