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Annotation of xinu/h/date.h, revision 1.1.1.1

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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