70 lines
1.0 KiB
C
70 lines
1.0 KiB
C
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/* long DecimalMantissa(pSrc);
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*
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* ARGUMENT
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* DEC *pSrc;
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*
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* DESCRIPTION
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* Finds the mantissa of pSrc.
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*
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* SIDE EFFECTS
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* None.
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*
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* RETURNS
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* The mantissa, or an error code
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*
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* POSSIBLE ERROR CODES
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*
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* GM_NULLPOINTER
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* GM_OVERFLOW
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*
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* AUTHOR
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* Jared Levy
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* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
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*
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* MODIFICATIONS
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*
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*
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*/
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#include <stdio.h>
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#include "gm.h"
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#include "gmsystem.h"
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long DecimalMantissa(pSrc)
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DEC *pSrc;
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{
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long l;
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_MacStart(GM_DMANT);
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if (!pSrc) {
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_MacErr(GM_NULLPOINTER);
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_MacRet((long) GM_NULLPOINTER);
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}
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if (_MacBad(pSrc)) {
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_MacErr(GM_INIT);
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_MacRet((long) GM_INIT);
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}
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if (pSrc->ls.lsl[1] || pSrc->ls.lmsd) {
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_MacErr(GM_OVERFLOW);
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l = (long) GM_OVERFLOW;
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_MacRet(l);
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}
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if (pSrc->ls.lsl[0]&0x80000000L) {
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if ((pSrc->ls.lsl[0]!=0x80000000L) || !_MacIsDecN(pSrc)) {
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_MacErr(GM_OVERFLOW);
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_MacRet((long) GM_OVERFLOW);
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}
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else
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_MacRet((long) 0x80000000L);
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}
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l = pSrc->ls.lsl[0];
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if (_MacIsDecN(pSrc))
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{_MacRet(-l);}
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else
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{_MacRet(l);}
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}
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