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/* $Header: /var/lib/cvs/dynare_cpp/sylv/cc/KronUtils.cpp,v 1.1.1.1 2004/06/04 13:00:31 kamenik Exp $ */
/* Tag $Name: $ */
#include "KronUtils.h"
void KronUtils::multAtLevel(int level, const QuasiTriangular& t,
KronVector& x)
{
if (0 < level && level < x.getDepth()) {
for (int i = 0; i < x.getM(); i++) {
KronVector xi(x, i);
multAtLevel(level, t, xi);
}
} else if (0 == level && 0 < x.getDepth()) {
GeneralMatrix tmp(x.base(), x.getN(), power(x.getM(),x.getDepth()));
t.multLeftOther(tmp);
} else if (0 == level && 0 == x.getDepth()) {
Vector b((const Vector&)x);
t.multVec(x,b);
} else { // 0 < level == depth
t.multKron(x);
}
}
void KronUtils::multAtLevelTrans(int level, const QuasiTriangular& t,
KronVector& x)
{
if (0 < level && level < x.getDepth()) {
for (int i = 0; i < x.getM(); i++) {
KronVector xi(x, i);
multAtLevelTrans(level, t, xi);
}
} else if (0 == level && 0 < x.getDepth()) {
GeneralMatrix tmp(x.base(), x.getN(), power(x.getM(),x.getDepth()));
t.multLeftOtherTrans(tmp);
} else if (level == 0 && 0 == x.getDepth()) {
Vector b((const Vector&)x);
t.multVecTrans(x,b);
} else { // 0 < level == depth
t.multKronTrans(x);
}
}
void KronUtils::multKron(const QuasiTriangular& f, const QuasiTriangular& k,
KronVector& x)
{
multAtLevel(0, k, x);
if (x.getDepth() > 0) {
for (int level = 1; level <= x.getDepth(); level++)
multAtLevelTrans(level, f, x);
}
}
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