KmlDssSymGet?IL

Obtain handle-related long integer values.

Interface Definition

C interfaces:

int KmlDssSymGetSIL(KmlSolverTask **pHandle, enum KmlSolverParam param, int64_t *value, int nvalue);

int KmlDssSymGetDIL(KmlSolverTask **pHandle, enum KmlSolverParam param, int64_t *value, int nvalue);

int KmlDssSymGetCIL(KmlSolverTask **pHandle, enum KmlSolverParam param, int64_t *value, int nvalue);

int KmlDssSymGetZIL(KmlSolverTask **pHandle, enum KmlSolverParam param, int64_t *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_FILL_IN is supported, indicating the number of fill-in elements.	Input
value	int64_t *	Array containing parameters related to direct solution methods.	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.
KMLSS_INTERNAL_ERROR	int	Failed to obtain KMLSS_FILL_IN because the pHandle status is abnormal.
KMLSS_BAD_SELECTOR	int	The input value of KML_SOLVER_PARAM is not supported currently or does not exist during the solving process.

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

int64_t nnz;
ierr = KmlDssSymGetDIL(&handle, KMLSS_FILL_IN, &nnz, 1);
if (ierr != 0) {
        printf("\nERROR in KmlDssSymGetDIL: %d", ierr);
}
printf("NNZ = %d\n", nnz);

Output:

NNZ = 32

Parent topic: LDLT (DEPRECATED)