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Annotation of src/usr.bin/cvs/rcstime.c, Revision 1.3

1.3     ! joris       1: /*     $OpenBSD: rcstime.c,v 1.2 2006/03/09 16:53:56 joris 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:
1.3     ! joris      32: void
        !            33: rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb)
1.1       xsa        34: {
                     35:        int tzone;
1.3     ! joris      36:        int neg, pos;
1.1       xsa        37:        char *h, *m;
1.3     ! joris      38:        struct tm *ltb;
1.1       xsa        39:        time_t now;
                     40:
                     41:        if (!strcmp(tz, "LT")) {
                     42:                now = mktime(&rdp->rd_date);
1.3     ! joris      43:                ltb = localtime(&now);
        !            44:                ltb->tm_hour += ((int)ltb->tm_gmtoff/3600);
        !            45:                memcpy(tb, ltb, sizeof(struct tm));
1.1       xsa        46:        } else {
1.3     ! joris      47:                neg = pos = 0;
1.1       xsa        48:                switch (*tz) {
                     49:                case '-':
1.3     ! joris      50:                        neg = 1;
        !            51:                        break;
        !            52:                case '+':
        !            53:                        pos = 1;
1.1       xsa        54:                        break;
                     55:                default:
                     56:                        fatal("%s: not a known time zone", tz);
                     57:                }
                     58:
1.3     ! joris      59:                h = (tz + 1);
1.1       xsa        60:                if ((m = strrchr(tz, ':')) != NULL)
                     61:                        *(m++) = '\0';
                     62:
1.3     ! joris      63:                memcpy(tb, &rdp->rd_date, sizeof(struct tm));
1.1       xsa        64:
                     65:                tzone = atoi(h);
                     66:                if ((tzone >= 24) && (tzone <= -24))
                     67:                        fatal("%s: not a known time zone", tz);
                     68:
1.3     ! joris      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))
1.1       xsa        78:                        tb->tm_hour = 0;
                     79:
                     80:                if (m != NULL) {
                     81:                        tzone = atoi(m);
                     82:                        if (tzone >= 60)
                     83:                                fatal("%s: not a known time zone", tz);
                     84:
                     85:                        if ((tb->tm_min + tzone) >= 60) {
                     86:                                tb->tm_hour++;
1.3     ! joris      87:                                tb->tm_min -= (60 - tzone);
1.1       xsa        88:                        } else
                     89:                                tb->tm_min += tzone;
                     90:
                     91:                        tb->tm_gmtoff += (tzone*60);
                     92:                }
                     93:        }
                     94: }