59 lines
918 B
C
59 lines
918 B
C
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/* unsigned long dtoul(x)
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*
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* ARGUMENT
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* DEC *x;
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*
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* DESCRIPTION
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* Converts a DEC to an unsigned long.
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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 long if the conversion is successful, and the error code
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* otherwise.
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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_CNVRE
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* GM_CNVRW
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*
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* AUTHOR
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* Jared Levy Feb. 9, 1987
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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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unsigned long ConvDecimalToUnsLong(x)
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DEC *x;
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{
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DEC t;
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DEC *pt;
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unsigned long i;
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_MacStart(GM_DTOUL);
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_MacInVar(x, 0L);
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pt=&t;
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(void) _ScaleDec80Bit(pt, x, 0);
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/* 0 <= x < 2^32 */
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if (!_MacIsDecN(pt) && (pt->ls.lsl[1] == 0) && (pt->dc.msd == 0)) {
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if (CompareDecimal(pt,x)!=0)
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_MacErr(GM_CNVRW);
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i = pt->ls.lsl[0];
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_MacRet (i);
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}
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/* overflow */
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_MacErr(GM_CNVRE);
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_MacRet((unsigned) 0L);
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}
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