62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
|
/* int _ScaleDec80Bit(pDst,pSrc1,wID)
|
||
|
|
*
|
||
|
|
* ARGUMENT
|
||
|
|
* pDst is a pointer to the destination DEC structure.
|
||
|
|
* pSrc1 is a ptr to the source1 DEC structure.
|
||
|
|
* wID is the integer specifying location of implied decimal
|
||
|
|
* for the conversion.
|
||
|
|
*
|
||
|
|
* DESCRIPTION
|
||
|
|
* Adjusts the number in pSrc1 (if necessary) while copying it to
|
||
|
|
* pDst adjusting pDst to wID number of decimal places. If pDst is null
|
||
|
|
* on entry, tries to first create a pDst, then the conversion.
|
||
|
|
*
|
||
|
|
* SIDE EFFECTS
|
||
|
|
* pSrc1 remains unchanged, pDst is undefined on error.
|
||
|
|
*
|
||
|
|
* RETURNS
|
||
|
|
* Returns GM_SUCCESS unless there is an error,
|
||
|
|
* in which case it returns the error code.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* AUTHOR
|
||
|
|
* Andy Anderson 27-JAN-1987 19:25
|
||
|
|
* Copyright (C) 1988-1990 Greenleaf Software Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* MODIFICATIONS
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "gm.h"
|
||
|
|
#include "gmsystem.h"
|
||
|
|
|
||
|
|
int _ScaleDec80Bit(pDst,pSrc1,wID)
|
||
|
|
DEC *pDst, *pSrc1;
|
||
|
|
int wID;
|
||
|
|
{
|
||
|
|
register int i;
|
||
|
|
|
||
|
|
_MacDCopy(pDst,pSrc1);
|
||
|
|
|
||
|
|
i = pSrc1->ls.lid - wID;
|
||
|
|
|
||
|
|
/* Make sure there's an adjustment to do */
|
||
|
|
if(i == 0) {
|
||
|
|
return(GM_SUCCESS);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set implied decimal */
|
||
|
|
pDst->ls.lid = wID;
|
||
|
|
if(i>0) {
|
||
|
|
_DivUnsArrByPwrOf10( pDst->dc.sl,5,i);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if((_MulUnsArrByPwrOf10( pDst->dc.sl, -i, 5)
|
||
|
|
!= GM_SUCCESS) || (pDst->dc.msd & 0x8000))
|
||
|
|
return(GM_OVERFLOW);
|
||
|
|
}
|
||
|
|
|
||
|
|
return(GM_SUCCESS);
|
||
|
|
}
|