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| | #ifndef EIGEN_SPARSELU_UTILS_H |
| | #define EIGEN_SPARSELU_UTILS_H |
| |
|
| | namespace Eigen { |
| | namespace internal { |
| |
|
| | |
| | |
| | |
| | template <typename Scalar, typename StorageIndex> |
| | void SparseLUImpl<Scalar,StorageIndex>::countnz(const Index n, Index& nnzL, Index& nnzU, GlobalLU_t& glu) |
| | { |
| | nnzL = 0; |
| | nnzU = (glu.xusub)(n); |
| | Index nsuper = (glu.supno)(n); |
| | Index jlen; |
| | Index i, j, fsupc; |
| | if (n <= 0 ) return; |
| | |
| | for (i = 0; i <= nsuper; i++) |
| | { |
| | fsupc = glu.xsup(i); |
| | jlen = glu.xlsub(fsupc+1) - glu.xlsub(fsupc); |
| | |
| | for (j = fsupc; j < glu.xsup(i+1); j++) |
| | { |
| | nnzL += jlen; |
| | nnzU += j - fsupc + 1; |
| | jlen--; |
| | } |
| | } |
| | } |
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| | |
| | template <typename Scalar, typename StorageIndex> |
| | void SparseLUImpl<Scalar,StorageIndex>::fixupL(const Index n, const IndexVector& perm_r, GlobalLU_t& glu) |
| | { |
| | Index fsupc, i, j, k, jstart; |
| | |
| | StorageIndex nextl = 0; |
| | Index nsuper = (glu.supno)(n); |
| | |
| | |
| | for (i = 0; i <= nsuper; i++) |
| | { |
| | fsupc = glu.xsup(i); |
| | jstart = glu.xlsub(fsupc); |
| | glu.xlsub(fsupc) = nextl; |
| | for (j = jstart; j < glu.xlsub(fsupc + 1); j++) |
| | { |
| | glu.lsub(nextl) = perm_r(glu.lsub(j)); |
| | nextl++; |
| | } |
| | for (k = fsupc+1; k < glu.xsup(i+1); k++) |
| | glu.xlsub(k) = nextl; |
| | } |
| | |
| | glu.xlsub(n) = nextl; |
| | } |
| |
|
| | } |
| |
|
| | } |
| | #endif |
| |
|