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Annotation of src/usr.bin/cvs/rcstime.c, Revision 1.2

1.2     ! joris       1: /*     $OpenBSD: rcstime.c,v 1.1 2006/03/09 10:56:33 xsa Exp $ */
1.1       xsa         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 "includes.h"
                     28:
                     29: #include "log.h"
                     30: #include "rcs.h"
                     31:
                     32:
                     33: struct tm *
                     34: rcs_set_tz(char *tz, struct rcs_delta *rdp)
                     35: {
                     36:        int tzone;
                     37:        char *h, *m;
                     38:        struct tm *tb, ltb;
                     39:        time_t now;
                     40:
                     41:        tb = &rdp->rd_date;
                     42:
                     43:        if (!strcmp(tz, "LT")) {
                     44:                now = mktime(&rdp->rd_date);
                     45:                tb = localtime(&now);
                     46:                tb->tm_hour += ((int)tb->tm_gmtoff/3600);
                     47:        } else {
                     48:                switch (*tz) {
                     49:                case '-':
                     50:                case '+':
                     51:                        break;
                     52:                default:
                     53:                        fatal("%s: not a known time zone", tz);
                     54:                }
                     55:
                     56:                h = tz;
                     57:                if ((m = strrchr(tz, ':')) != NULL)
                     58:                        *(m++) = '\0';
                     59:
                     60:                ltb = rdp->rd_date;
                     61:                tb = &ltb;
                     62:
                     63:                tzone = atoi(h);
                     64:                if ((tzone >= 24) && (tzone <= -24))
                     65:                        fatal("%s: not a known time zone", tz);
                     66:
                     67:                tb->tm_hour += tzone;
                     68:                if ((tb->tm_hour >= 24) && (tb->tm_hour <= -24))
                     69:                        tb->tm_hour = 0;
                     70:
                     71:                tb->tm_gmtoff += (tzone*3600);
                     72:
                     73:                if (m != NULL) {
                     74:                        tzone = atoi(m);
                     75:                        if (tzone >= 60)
                     76:                                fatal("%s: not a known time zone", tz);
                     77:
                     78:                        if ((tb->tm_min + tzone) >= 60) {
                     79:                                tb->tm_hour++;
1.2     ! joris      80:                                tb->tm_min -= tzone;
1.1       xsa        81:                        } else
                     82:                                tb->tm_min += tzone;
                     83:
                     84:                        tb->tm_gmtoff += (tzone*60);
                     85:                }
                     86:        }
                     87:
                     88:        return (tb);
                     89: }