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#include "fracture.h"
void factor_update(cholmod_factor *factor, uint_t v1, uint_t v2, cholmod_common *c) {
uint_t n = factor->n;
cholmod_sparse *update_mat =
CHOL_F(allocate_sparse)(n, n, 2, true, true, 0, CHOLMOD_REAL, c);
uint_t s1, s2;
s1 = v1 < v2 ? v1 : v2;
s2 = v1 > v2 ? v1 : v2;
int_t *pp = (int_t *)update_mat->p;
int_t *ii = (int_t *)update_mat->i;
double *xx = (double *)update_mat->x;
for (uint_t i = 0; i <= s1; i++) {
pp[i] = 0;
}
for (uint_t i = s1 + 1; i <= n; i++) {
pp[i] = 2;
}
ii[0] = s1;
ii[1] = s2;
xx[0] = 1;
xx[1] = -1;
cholmod_sparse *perm_update_mat = CHOL_F(submatrix)(
update_mat, factor->Perm, factor->n, NULL, -1, true, true, c);
CHOL_F(updown)(false, perm_update_mat, factor, c);
CHOL_F(free_sparse)(&perm_update_mat, c);
CHOL_F(free_sparse)(&update_mat, c);
}
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