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#include "tools.h"
int Cnumroc2(N, I, nb, proc, srcproc, nproc)
int N;
int I;
int nb;
int proc;
int srcproc;
int nproc;
{
int nrocs=0, nblocks, extrablocks, dist;
/*
* If I is non-zero, handle possibly partial first block
*/
if (I)
{
srcproc = MCindxg2p(I, nb, srcproc, nproc);
nrocs = nb - (I % nb);
if (nrocs > N) nrocs = N;
if (nrocs)
{
N -= nrocs;
if (proc != srcproc) nrocs = 0;
srcproc = (srcproc + 1) % nproc;
}
}
/*
* Figure proc's distance from srcproc
*/
dist = (nproc + proc - srcproc) % nproc;
/*
* Figure number of blocks given to all processes
*/
nblocks = N / nb;
nrocs += (nblocks/nproc) * nb;
/*
* If we've got blocks that are not given to all processes
*/
extrablocks = nblocks % nproc;
if (dist < extrablocks) nrocs += nb;
else if (dist == extrablocks) nrocs += N % nb;
return(nrocs);
}
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