ba237a9d91
Files correlati : Ricompilazione Demo : [ ] Commento : Aggiunti i sorgenti per Greenleaf Math Library (gfm.dll) git-svn-id: svn://10.65.10.50/trunk@10079 c028cbd2-c16b-5b4b-a496-9718f37d4682
73 lines
1.2 KiB
C
Executable File
73 lines
1.2 KiB
C
Executable File
/* int _DoubleUnsArr(a,n)
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*
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* ARGUMENT
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* unsigned *a;
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* int n;
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*
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* DESCRIPTION
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* Multiplies a by 2 and stores the result in a.
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*
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*
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* SIDE EFFECTS
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*
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*
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* RETURNS
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* SUCCESS if no overflow, otherwise FAILURE.
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*
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* AUTHOR
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* Brugnoli Giugno 1992
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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 <math.h>
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#include "gm.h"
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#include "gmsystem.h"
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extern double pow(double, double);
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void _DoubleUnsArr(a,n)
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unsigned SHORT a[];
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int n;
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{
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int i;
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unsigned long maxunsint,pdst;
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unsigned SHORT carry;
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carry=0;
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#ifdef SH_LIB
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maxunsint=1;
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for (i=1;i<=BITSPERUI;i++) maxunsint*=2;
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maxunsint--;
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#else
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maxunsint=(unsigned long)pow(2.,(float)BITSPERUI)-1;
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#endif
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if (n>0)
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{
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for (i=0;i<n;i++)
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{
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pdst=carry+(unsigned long)a[i]*2;
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if (pdst>maxunsint)
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{
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carry=(unsigned SHORT)(pdst>> BITSPERUI );
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a[i]=(unsigned SHORT)(pdst & maxunsint );
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}
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else
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{
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a[i]=(unsigned SHORT)pdst;
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carry=0;
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}
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}
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if ((a[n-1])>>(BITSPERUI-1))
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{
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return(FAILURE);
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}
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else
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{
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return(GM_SUCCESS);
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}
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}
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}
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