campo-sirio/gfm/muldfd.c

59 lines
1.2 KiB
C
Raw Normal View History

/* DEC *MultiplyDecimalByDouble(pDst,pSrc1,l)
*
* ARGUMENT
* pDst is a pointer to the destination DEC structure.
* pSrc1 is a ptr to the source1 DEC structure.
* l is the double to be multiplied by pSrc1
*
* DESCRIPTION
* Multiplies the value 'l' by pSrc1 and puts the result
* in dest DEC structure.
*
* SIDE EFFECTS
* On overflow, the dest value is destroyed.
*
* RETURNS
* Returns a pointer to the dest structure unless overflow,
* when it returns a GM_NULL. On error, the error
* is in wGMError, unless an error was already there.
*
* POSSIBLE ERROR CODES
*
* GM_NULLPOINTER
* GM_OVERFLOW
* GM_UNDERFLOW
* GM_CNVRE
*
* AUTHOR
* Andy Anderson 08-JUL-1987 1500
* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
*
* MODIFICATIONS
*
*/
#include <stdio.h>
#include "gm.h"
#include "gmsystem.h"
DEC *MultiplyDecimalByDouble(pDst,pSrc1,l)
DEC *pDst,*pSrc1;
double l;
{
DEC decS2, *pSrc2=&decS2, *pd;
_MacStart(GM_MULDFD);
/* Convert the double to a DEC */
pSrc2=ConvDoubleToDecimal(pSrc2,l);
if (!pSrc2) {
if (pDst)
_MacDZero(pDst);
_MacRet(GM_NULL);
}
pd = MultiplyDecimal(pDst,pSrc1,pSrc2);
_MacRet(pd);
}