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Annotation of 43BSDReno/contrib/isode-beta/psap/gtime.c, revision 1.1

1.1     ! root        1: /* gtime.c - inverse gmtime */
        !             2: 
        !             3: #ifndef        lint
        !             4: static char *rcsid = "$Header: /f/osi/psap/RCS/gtime.c,v 7.0 89/11/23 22:12:37 mrose Rel $";
        !             5: #endif
        !             6: 
        !             7: /* 
        !             8:  * $Header: /f/osi/psap/RCS/gtime.c,v 7.0 89/11/23 22:12:37 mrose Rel $
        !             9:  *
        !            10:  *
        !            11:  * $Log:       gtime.c,v $
        !            12:  * Revision 7.0  89/11/23  22:12:37  mrose
        !            13:  * Release 6.0
        !            14:  * 
        !            15:  */
        !            16: 
        !            17: /*
        !            18:  *                               NOTICE
        !            19:  *
        !            20:  *    Acquisition, use, and distribution of this module and related
        !            21:  *    materials are subject to the restrictions of a license agreement.
        !            22:  *    Consult the Preface in the User's Manual for the full terms of
        !            23:  *    this agreement.
        !            24:  *
        !            25:  */
        !            26: 
        !            27: 
        !            28: /* LINTLIBRARY */
        !            29: 
        !            30: #include <stdio.h>
        !            31: #include "psap.h"
        !            32: #ifdef OSX
        !            33: #include <sys/time.h>
        !            34: #endif
        !            35: #ifdef notdef
        !            36: #include <sys/timeb.h>
        !            37: #endif
        !            38: 
        !            39: /*    DATA */
        !            40: 
        !            41: /* gtime(): the inverse of localtime().
        !            42:        This routine was supplied by Mike Accetta at CMU many years ago.
        !            43:  */
        !            44: 
        !            45: int    dmsize[] = {
        !            46:     31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
        !            47: };
        !            48: 
        !            49: #define        dysize(y)       \
        !            50:        (((y) % 4) ? 365 : (((y) % 100) ? 366 : (((y) % 400) ? 365 : 366)))
        !            51: 
        !            52: #define        YEAR(y)         ((y) >= 100 ? (y) : (y) + 1900)
        !            53: 
        !            54: /*  */
        !            55: 
        !            56: long   gtime (tm)
        !            57: register struct tm *tm;
        !            58: {
        !            59:     register int    i,
        !            60:                     sec,
        !            61:                     mins,
        !            62:                     hour,
        !            63:                     mday,
        !            64:                     mon,
        !            65:                     year;
        !            66:     register long   result;
        !            67: #ifdef notdef
        !            68:     long    local;
        !            69:     struct timeb    tb;
        !            70: #endif
        !            71: 
        !            72:     if ((sec = tm -> tm_sec) < 0 || sec > 59
        !            73:            || (mins = tm -> tm_min) < 0 || mins > 59
        !            74:            || (hour = tm -> tm_hour) < 0 || hour > 24
        !            75:            || (mday = tm -> tm_mday) < 1 || mday > 31
        !            76:            || (mon = tm -> tm_mon + 1) < 1 || mon > 12)
        !            77:        return ((long) NOTOK);
        !            78:     if (hour == 24) {
        !            79:        hour = 0;
        !            80:        mday++;
        !            81:     }
        !            82:     year = YEAR (tm -> tm_year);
        !            83: 
        !            84:     result = 0L;
        !            85:     for (i = 1970; i < year; i++)
        !            86:        result += dysize (i);
        !            87:     if (dysize (year) == 366 && mon >= 3)
        !            88:        result++;
        !            89:     while (--mon)
        !            90:        result += dmsize[mon - 1];
        !            91:     result += mday - 1;
        !            92:     result = 24 * result + hour;
        !            93:     result = 60 * result + mins;
        !            94:     result = 60 * result + sec;
        !            95: 
        !            96: #ifdef notdef
        !            97:     (void) ftime (&tb);
        !            98:     result += 60 * tb.timezone;
        !            99:     local = result;
        !           100:     if ((tm = localtime (&local)) && tm -> tm_isdst)
        !           101:        result -= 60 * 60;
        !           102: #endif
        !           103: 
        !           104:     return result;
        !           105: }

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