50 lines
846 B
C
50 lines
846 B
C
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/* int TestSignDecimal(pSrc1);
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*
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* ARGUMENT
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* DEC *pSrc1;
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*
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* DESCRIPTION
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* Decides whether pSrc1 is positive, negative, or zero.
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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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* Returns 1 if scr1 is positive.
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* 0 if pSrc1 is zero.
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* -1 if scr1 is negative.
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* Returns GM_NULLPOINTER if pSrc1 points to a null.
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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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*
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* AUTHOR
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* Andy Anderson 27-JAN-1987 19:00
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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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#include <stdio.h>
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#include "gm.h"
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#include "gmsystem.h"
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int TestSignDecimal(pSrc1)
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DEC *pSrc1;
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{
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_MacStart(GM_DSIGN);
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_MacInVarI(pSrc1);
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/* keep checks in this order */
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if(_MacIsDecP(pSrc1)) /* means positive AND non-zero */
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_MacRet(1);
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if(_MacIsDecN(pSrc1)) /* negative bit set */
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_MacRet(-1);
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_MacRet(0);
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}
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