void
AccpmLALinSolve(const RealMatrix &A, bool cholesky, RealMatrix &X, const RealMatrix &B)
{
if (!cholesky) {
AccpmLALinearSolve(A, X, B);
return;
}
char uplo = 'L';
long int n = A.size(0);
long int lda = A.inc(0) * A.gdim(0);
long int nrhs = B.size(1);
long int ldb = B.inc(0) * B.gdim(0);
long int info;
RealMatrix L(A);
X.inject(B);
//double alpha = 1;
//F77NAME(dtrsm)("L","U","T","N",&n,&nrhs,&alpha,&A(0,0),&n,&X(0,0),&n);
//F77NAME(dtrsm)("L","U","N","N",&n,&nrhs,&alpha,&A(0,0),&n,&X(0,0),&n);
//F77NAME(dpotrs)(&uplo, &n, &nrhs, (doublereal *)&L(0,0), &lda, &X(0,0), &ldb, &info);
F77NAME(dpotrs)(&uplo, &n, &nrhs, &L(0,0), &lda, &X(0,0), &ldb, &info);
if (info < 0) {
std::cerr << "AccpmLALinSolve: argument " << -info << " is invalid"
<< std::endl;
}
}
int
AccpmLASymmLinSolve(SymmetricMatrix &A, RealMatrix &X, const RealMatrix &B)
{
LaLowerTriangMatDouble L(A);
char uplo = 'L';
long int n = A.size(0);
long int lda = A.inc(0) * A.gdim(0);
long int nrhs = B.size(1);
long int ldb = B.inc(0) * B.gdim(0);
long int info;
X.inject(B);
F77NAME(dposv) (&uplo, &n, &nrhs, &L(0,0), &lda, &X(0,0), &ldb, &info);
if (info > 0) {
std::cerr << "AccpmLASymmLinSolve: Symmetric Matrix is not positive-definite."
<< std::endl;
} else if (info < 0) {
std::cerr << "AccpmLASymmLinSolve: argument " << -info << " is invalid"
<< std::endl;
}
return info;
}
