23 lines
674 B
C++
23 lines
674 B
C++
#include <limits>
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#include "nr.h"
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using namespace std;
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void NR::arcmak(Vec_I_ULNG &nfreq, unsigned long nchh, unsigned long nradd,
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arithcode &acode)
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{
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const unsigned long MAXULNG=numeric_limits<unsigned long>::max();
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unsigned long j;
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unsigned long MC=acode.ncumfq.size()-2;
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if (nchh > MC) nrerror("input radix may not exceed MC in arcmak.");
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if (nradd > 256) nrerror("output radix may not exceed 256 in arcmak.");
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acode.minint=MAXULNG/nradd;
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acode.nch=nchh;
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acode.nrad=nradd;
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acode.ncumfq[0]=0;
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for (j=1;j<=acode.nch;j++)
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acode.ncumfq[j]=acode.ncumfq[j-1]+MAX(nfreq[j-1],(unsigned long) 1);
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acode.ncum=acode.ncumfq[acode.nch+1]=acode.ncumfq[acode.nch]+1;
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}
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