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Annotation of src/usr.bin/rcs/rcstime.c, Revision 1.1

1.1     ! joris       1: /*     $OpenBSD: rcstime.c,v 1.5 2006/04/17 06:33:22 ray 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 "includes.h"
        !            28:
        !            29: #include "rcs.h"
        !            30:
        !            31: void
        !            32: rcs_set_tz(char *tz, struct rcs_delta *rdp, struct tm *tb)
        !            33: {
        !            34:        int tzone;
        !            35:        int pos;
        !            36:        char *h, *m;
        !            37:        struct tm *ltb;
        !            38:        time_t now;
        !            39:
        !            40:        if (!strcmp(tz, "LT")) {
        !            41:                now = mktime(&rdp->rd_date);
        !            42:                ltb = localtime(&now);
        !            43:                ltb->tm_hour += ((int)ltb->tm_gmtoff/3600);
        !            44:                memcpy(tb, ltb, sizeof(struct tm));
        !            45:        } else {
        !            46:                pos = 0;
        !            47:                switch (*tz) {
        !            48:                case '-':
        !            49:                        break;
        !            50:                case '+':
        !            51:                        pos = 1;
        !            52:                        break;
        !            53:                default:
        !            54:                        errx(1, "%s: not a known time zone", tz);
        !            55:                }
        !            56:
        !            57:                h = (tz + 1);
        !            58:                if ((m = strrchr(tz, ':')) != NULL)
        !            59:                        *(m++) = '\0';
        !            60:
        !            61:                memcpy(tb, &rdp->rd_date, sizeof(struct tm));
        !            62:
        !            63:                tzone = atoi(h);
        !            64:                if ((tzone >= 24) && (tzone <= -24))
        !            65:                        errx(1, "%s: not a known time zone", tz);
        !            66:
        !            67:                if (pos) {
        !            68:                        tb->tm_hour += tzone;
        !            69:                        tb->tm_gmtoff += (tzone * 3600);
        !            70:                } else {
        !            71:                        tb->tm_hour -= tzone;
        !            72:                        tb->tm_gmtoff -= (tzone * 3600);
        !            73:                }
        !            74:
        !            75:                if ((tb->tm_hour >= 24) || (tb->tm_hour <= -24))
        !            76:                        tb->tm_hour = 0;
        !            77:
        !            78:                if (m != NULL) {
        !            79:                        tzone = atoi(m);
        !            80:                        if (tzone >= 60)
        !            81:                                errx(1, "%s: not a known time zone", tz);
        !            82:
        !            83:                        if ((tb->tm_min + tzone) >= 60) {
        !            84:                                tb->tm_hour++;
        !            85:                                tb->tm_min -= (60 - tzone);
        !            86:                        } else
        !            87:                                tb->tm_min += tzone;
        !            88:
        !            89:                        tb->tm_gmtoff += (tzone*60);
        !            90:                }
        !            91:        }
        !            92: }