98bee2b9ff
Files correlati : gfm.dll Ricompilazione Demo : [ ] Commento : Migliorato arrotondamento numeri reali git-svn-id: svn://10.65.10.50/trunk@11722 c028cbd2-c16b-5b4b-a496-9718f37d4682
87 lines
1.8 KiB
C
Executable File
87 lines
1.8 KiB
C
Executable File
/* DEC *RoundDecimal(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. When the
|
|
* number of decimal places decreases, the result is rounded off.
|
|
*
|
|
* SIDE EFFECTS
|
|
* pSrc1 remains unchanged and pDst is undefined on error.
|
|
*
|
|
* RETURNS
|
|
* Returns a pointer to the pDst structure unless error,
|
|
* in which case it returns a NULL(a C false). On error, the error
|
|
* is in wGMError, unless an error was already there.
|
|
*
|
|
* POSSIBLE ERROR CODES
|
|
*
|
|
* GM_NULLPOINTER
|
|
* GM_INVALIDID
|
|
* GM_OVERFLOW
|
|
* GM_UNDERFLOW
|
|
*
|
|
* AUTHOR
|
|
* Jared Levy 5/28/87
|
|
* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
|
|
*
|
|
* MODIFICATIONS
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "gm.h"
|
|
#include "gmsystem.h"
|
|
|
|
DEC *RoundDecimal(pDst,pSrc1,wID)
|
|
DEC *pDst, *pSrc1;
|
|
int wID;
|
|
{
|
|
int i;
|
|
|
|
_MacStart(GM_DROUND);
|
|
_MacInVarD(pSrc1);
|
|
_MacOutVarD(pDst);
|
|
|
|
if (wID<GM_MINID||wID>GM_MAXID) {
|
|
_MacErr(GM_INVALIDID);
|
|
_MacRet(GM_NULL);
|
|
}
|
|
|
|
/* Added by Guy */
|
|
if (wID >= pDst->dc.id)
|
|
{
|
|
if (pDst != pSrc1)
|
|
_MacDCopy(pDst,pSrc1);
|
|
_MacRet(pDst);
|
|
}
|
|
|
|
if(_MacIsDecZ(pSrc1)) {
|
|
_MacDZero(pDst);
|
|
pDst->dc.id = wID;
|
|
_MacRet(pDst);
|
|
}
|
|
|
|
i = _ScaleDec80Bit(pDst, pSrc1, wID);
|
|
|
|
/* check if number can fit into 64 bits (no shifting allowed) */
|
|
if (!((pDst->dc.msd == 0) && (pDst->dc.sl[3] < 32768L)))
|
|
i = GM_OVERFLOW;
|
|
|
|
if (i == GM_OVERFLOW) {
|
|
_MacErr(GM_OVERFLOW);
|
|
_MacRet(GM_NULL);
|
|
}
|
|
|
|
if (_MacIsDecZ(pDst))
|
|
_MacErr(GM_UNDERFLOW);
|
|
|
|
_MacRet(pDst);
|
|
}
|