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setdate.prg
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1991-08-15
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102 lines
/*
* File......: SETDATE.PRG
* Author....: Glenn Scott
* CIS ID....: 71620,1521
* Date......: $Date: 15 Aug 1991 23:04:36 $
* Revision..: $Revision: 1.3 $
* Log file..: $Logfile: E:/nanfor/src/setdate.prv $
*
* This is an original work by Glenn Scott and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log: E:/nanfor/src/setdate.prv $
*
* Rev 1.3 15 Aug 1991 23:04:36 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.2 14 Jun 1991 19:52:58 GLENN
* Minor edit to file header
*
* Rev 1.1 12 Jun 1991 02:32:28 GLENN
* Documentation mod and change documented return value from "n" to "l"
* reflecting Ted's update of ft_int86().
*
* Rev 1.0 01 Apr 1991 01:02:16 GLENN
* Nanforum Toolkit
*
*/
/* $DOC$
* $FUNCNAME$
* FT_SETDATE()
* $CATEGORY$
* DOS/BIOS
* $ONELINER$
* Set the DOS system date
* $SYNTAX$
* FT_SETDATE( <dDate> ) -> <lResult>
* $ARGUMENTS$
* <dDate> is a Clipper date variable that you want to set the current
* DOS system date to.
*
* It is up to you to send in a valid date. The
* year must be within the range 1980 through 2099. If DOS
* thinks the date is not valid, it won't change the date.
*
* $RETURNS$
* <lResult> is simply the result of FT_INT86(), passed back
* to your program.
*
* $DESCRIPTION$
* FT_SETDATE() uses NANFOR.LIB's FT_INT86() function to invoke
* the DOS Set Date service (Interrupt 33, service 43).
*
* $EXAMPLES$
*
* The following program takes a date from the command line and sets
* the DOS system date:
*
* FUNCTION main( cDate )
*
* cDate := iif( cDate == nil, dtoc( date() ), cDate )
* QOut( "Setting date to: " + cDate + "... " )
* FT_SETDATE( ctod( cDate ) )
* Qout( "Today is now: " + dtoc( date() ) )
*
* RETURN ( nil )
*
* $END$
*/
#include "FTINT86.CH"
#define DOS 33
#define SETDATE 43
#ifdef FT_TEST
FUNCTION MAIN( cDate )
cDate := iif( cDate == nil, dtoc( date() ), cDate )
QOut( "Setting date to: " + cDate + "... " )
FT_SETDATE( ctod( cDate ) )
Qout( "Today is now: " + dtoc( date() ) )
return ( nil )
#endif
function FT_SETDATE( dDate )
local aRegs[ INT86_MAX_REGS ]
dDate := iif( valtype(dDate) != "D", date(), dDate )
aRegs[ AX ] = SETDATE * ( 2 ^ 8 )
aregs[ CX ] = year( dDate )
aregs[ DX ] = ( month( dDate ) * ( 2 ^ 8 ) ) + day( dDate )
return( FT_INT86( DOS, aRegs ) )