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Annotation of src/usr.bin/rcs/rcstime.c, Revision 1.6

1.6     ! guenther    1: /*     $OpenBSD: rcstime.c,v 1.5 2014/09/30 11:01:20 otto Exp $        */
1.1       joris       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:
1.3       xsa        27: #include <err.h>
                     28: #include <stdlib.h>
                     29: #include <string.h>
1.6     ! guenther   30: #include <time.h>
1.1       joris      31:
                     32: #include "rcs.h"
                     33:
                     34: void
                     35: rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb)
                     36: {
                     37:        int tzone;
                     38:        int pos;
                     39:        char *h, *m;
1.5       otto       40:        const char *errstr;
1.1       joris      41:        struct tm *ltb;
                     42:        time_t now;
                     43:
                     44:        if (!strcmp(tz, "LT")) {
                     45:                now = mktime(&rdp->rd_date);
                     46:                ltb = localtime(&now);
                     47:                ltb->tm_hour += ((int)ltb->tm_gmtoff/3600);
1.2       niallo     48:                memcpy(tb, ltb, sizeof(*tb));
1.1       joris      49:        } else {
                     50:                pos = 0;
                     51:                switch (*tz) {
                     52:                case '-':
                     53:                        break;
                     54:                case '+':
                     55:                        pos = 1;
                     56:                        break;
                     57:                default:
                     58:                        errx(1, "%s: not a known time zone", tz);
                     59:                }
                     60:
                     61:                h = (tz + 1);
                     62:                if ((m = strrchr(tz, ':')) != NULL)
                     63:                        *(m++) = '\0';
                     64:
1.2       niallo     65:                memcpy(tb, &rdp->rd_date, sizeof(*tb));
1.1       joris      66:
1.5       otto       67:                tzone = strtonum(h, -23, 23, &errstr);
                     68:                if (errstr)
1.1       joris      69:                        errx(1, "%s: not a known time zone", tz);
                     70:
                     71:                if (pos) {
                     72:                        tb->tm_hour += tzone;
                     73:                        tb->tm_gmtoff += (tzone * 3600);
                     74:                } else {
                     75:                        tb->tm_hour -= tzone;
                     76:                        tb->tm_gmtoff -= (tzone * 3600);
                     77:                }
                     78:
                     79:                if ((tb->tm_hour >= 24) || (tb->tm_hour <= -24))
                     80:                        tb->tm_hour = 0;
                     81:
                     82:                if (m != NULL) {
1.5       otto       83:                        tzone = strtonum(m, 0, 59, &errstr);
                     84:                        if (errstr)
                     85:                                errx(1, "%s: not a known minute", m);
1.1       joris      86:
                     87:                        if ((tb->tm_min + tzone) >= 60) {
                     88:                                tb->tm_hour++;
                     89:                                tb->tm_min -= (60 - tzone);
                     90:                        } else
                     91:                                tb->tm_min += tzone;
                     92:
                     93:                        tb->tm_gmtoff += (tzone*60);
                     94:                }
                     95:        }
                     96: }