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Annotation of xinu/h/date.h, revision 1.1

1.1     ! root        1: /* date.h - net2xt, xt2net, isleap, ut2ltim */
        !             2: 
        !             3: /* Xinu stores time as seconds past Jan 1, 1970 (UNIX format), with    */
        !             4: /* 1 being 1 second into Jan. 1, 1970, GMT (universal time).  The      */
        !             5: /* Internet uses seconds past Jan 1, 1900 (also GMT or universal time) */
        !             6: 
        !             7: #define        net2xt(x)       ((x)-2208988800L)  /* convert net-to-xinu time  */
        !             8: #define        xt2net(x)       ((x)+2208988800L)  /* convert xinu-to-net time  */
        !             9: 
        !            10: /* Days in months and month names used to format a date */
        !            11: 
        !            12: struct datinfo {
        !            13:        int     dt_msize[12];
        !            14:        char    *dt_mnam[12];
        !            15: };
        !            16: 
        !            17: extern struct  datinfo Dat;
        !            18: 
        !            19: /* Constants for converting time to month/day/year/hour/minute/second  */
        !            20: 
        !            21: #define        isleap(x)       ((x)%4==0)      /* leap year? (1970-1999)       */
        !            22: #define        SECPERDY        (60L*60L*24L)   /* one day in seconds           */
        !            23: #define        SECPERHR        (60L*60L)       /* one hour in seconds          */
        !            24: #define        SECPERMN        (60L)           /* one minute in seconds        */
        !            25: 
        !            26: /* date doesn't understand daylight savings time (it was built in      */
        !            27: /*     Indiana where we're smart enough to realize that renumbering    */
        !            28: /*     doesn't save anything). However, the local time zone can be     */
        !            29: /*     set to EST, CST, MST,or PST.                                    */
        !            30: 
        !            31: #define        ZONE_EST        5               /* Eastern Standard time is 5   */
        !            32: #define        ZONE_CST        6               /*  hours west of England       */
        !            33: #define        ZONE_MST        7
        !            34: #define        ZONE_PST        8
        !            35: #define        TIMEZONE        ZONE_EST        /* timezone for this system     */
        !            36: 
        !            37: /* In-line procedure that converts universal time to local time                */
        !            38: 
        !            39: #define        ut2ltim(x)      ((x)-TIMEZONE*SECPERHR)
        !            40: #ifndef        TSERVER
        !            41: #define        TSERVER         "128.10.2.3:37"
        !            42: #endif

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