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Annotation of os2sdk/demos/examples/datetime/datetime.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Example of DOSGETDATETIME & DOSSETDATETIME usage
                      3:  *
                      4:  * These calls are used to set and get the current system time.
                      5:  * Also shows the structure of the information returned.
                      6:  *
                      7:  *     - on an IBM AT, DOSSETDATETIME changes the hardware real time clock
                      8:  *     - the system sets the 'timezone' value to -1 by default
                      9:  *
                     10:  * Compile as: cl -AL -G2 -Lp datetime.c
                     11:  *
                     12:  * Copyright (C) Microsoft Corp. 1986
                     13:  */
                     14: 
                     15: #include  <doscalls.h>
                     16: 
                     17: main()
                     18: {
                     19:     struct DateTime curdt, newdt, setdt;
                     20: 
                     21:     /* Read current date and time */
                     22:     DOSGETDATETIME(&curdt);
                     23: 
                     24:     /* Print date and time */
                     25:     printf("TIME: %d:%02d:%02d.%02d  DATE: %d/%d/%d  DAY OF WEEK: %d\n",
                     26:         curdt.hour,curdt.minutes,curdt.seconds,curdt.hundredths,
                     27:         curdt.month,curdt.day,curdt.year,curdt.day_of_week);
                     28:     /* NOTE: the system sets the 'timezone' value to -1 by default */
                     29:     printf("GMT = local_time %+d minutes\n",curdt.timezone);
                     30: 
                     31: 
                     32:     /* Set datetime struct to Thursday 12/25/86, 9:02:45.01pm PST */
                     33:     setdt.hour          =   21; /* Time is in 24 hour format */
                     34:     setdt.minutes       =    2;
                     35:     setdt.seconds       =   45;
                     36:     setdt.hundredths    =    1;
                     37:     setdt.day           =   25;
                     38:     setdt.month         =   12;
                     39:     setdt.year          = 1986; /* Year should include the century */
                     40:     setdt.timezone      =  480; /* PST is 8 hours after GMT (480 minutes) */
                     41: 
                     42:     /* Set system date and time */
                     43:     DOSSETDATETIME(&setdt);
                     44: 
                     45:     /* Read new date and time just set */
                     46:     DOSGETDATETIME(&newdt);
                     47: 
                     48:     /* Print date and time */
                     49:     printf("TIME: %d:%02d:%02d.%02d  DATE: %d/%d/%d  DAY OF WEEK: %d\n",
                     50:         newdt.hour,newdt.minutes,newdt.seconds,newdt.hundredths,
                     51:         newdt.month,newdt.day,newdt.year,newdt.day_of_week);
                     52:     printf("GMT = local_time %+d minutes\n",newdt.timezone);
                     53: 
                     54:     /* Reset date and time to whatever was read at the beginning */
                     55:     DOSSETDATETIME(&curdt);
                     56: }

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