KmlDssSymGet?II

Interface Definition

C interface:

int KmlDssSymGetSII(KmlSolverTask **pHandle, enum KmlSolverParam param, int *value, int nvalue);

int KmlDssSymGetDII(KmlSolverTask **pHandle, enum KmlSolverParam param, int *value, int nvalue);

int KmlDssSymGetCII(KmlSolverTask **pHandle, enum KmlSolverParam param, int *value, int nvalue);

int KmlDssSymGetZII(KmlSolverTask **pHandle, enum KmlSolverParam param, int *value, int nvalue);

Parameters

Parameter	Type	Description	Input/Output
pHandle	KmlSolverTask **	Solver handle. pHandle cannot be a null pointer.	Input
param	enum KmlSolverParam	Currently, only KMLSS_REFINEMENT_STEPS is supported, indicating the number of iterative refinement times.	Input
value	int	Array containing parameters related to direct resolution	Output
nvalue	int	Number of elements in the value array. Currently, the number must be 1.	Input

Return Value

Return Value	Type	Description
KMLSS_NO_ERROR	int	The execution is successful.
KMLSS_NULL_ARGUMENT	int	The pHandle or data pointer is null.
KMLSS_BAD_HANDLE	int	The format of pHandle is incorrect.
KMLSS_BAD_DATA_SIZE	int	The user-defined length (nvalue) of the value array is improper. That is, nvalue is not 1.
KMLSS_BAD_SELECTOR	int	The input value of KML_SOLVER_PARAM is not supported currently or does not exist during the analysis.

Dependencies

#include "kml_dss.h" or #include "kml_solver.h"

Examples

C interface:

int n = 8;
int ia[9] = {0, 2, 4, 6, 7, 8, 9, 10, 11};
int ja[11] = {0, 7, 1, 6, 2, 5, 3, 4, 5, 6, 7};
double a[11] = {1.0, 2.0, -2.0, 3.0, 3.0, 4.0, -4.0, 5.0, -6.0, 7.0, 8.0};

double b[8] = {3.0, 1.0, 7.0, -4.0, 5.0, -2.0, 10.0, 10.0};
double x[8];
int nrhs = 1;
int ldx = n, ldb = n;

KmlSolverTask *handle;
int ierr = KmlDssSymInitDI(&handle, n, a, ja, ia);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymInitDI: %d", ierr);
}
ierr = KmlDssSymAnalyzeDI(&handle);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymAnalyzeDI: %d", ierr);
}
ierr = KmlDssSymFactorizeDI(&handle);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymFactorizeDI: %d", ierr);
}

double tolerance = 1.e-12;
ierr = KmlDssSymSetDID(&handle, KMLSS_REFINEMENT_TOLERANCE_LEVEL, &tolerance, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSetDID: %d", ierr);
}
int nsteps = 2;
ierr = KmlDssSymSetDII(&handle, KMLSS_REFINEMENT_MAX_STEPS, &nsteps, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSetDII: %d", ierr);
}

ierr = KmlDssSymSolveDI(&handle, nrhs, x, ldx, b, ldb);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymSolveDI: %d", ierr);
}

printf("\n");
int nstep;
ierr = KmlDssSymGetDII(&handle, KMLSS_REFINEMENT_STEPS, &nstep, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymGetDII: %d", ierr);
}
printf("REFINEMENT_STEP = %d\n", nstep);

Output:

REFINEMENT_STEP = 1

Parent topic: LDLT