/* * Revision Control Information * * $Source$ * $Author$ * $Revision$ * $Date$ * */ #include "mincov_int.h" ABC_NAMESPACE_IMPL_START static int visit_col(); static void copy_row(A, prow) register sm_matrix *A; register sm_row *prow; { register sm_element *p; for(p = prow->first_col; p != 0; p = p->next_col) { (void) sm_insert(A, p->row_num, p->col_num); } } static int visit_row(A, prow, rows_visited, cols_visited) sm_matrix *A; sm_row *prow; int *rows_visited; int *cols_visited; { sm_element *p; sm_col *pcol; if (! prow->flag) { prow->flag = 1; (*rows_visited)++; if (*rows_visited == A->nrows) { return 1; } for(p = prow->first_col; p != 0; p = p->next_col) { pcol = sm_get_col(A, p->col_num); if (! pcol->flag) { if (visit_col(A, pcol, rows_visited, cols_visited)) { return 1; } } } } return 0; } static int visit_col(A, pcol, rows_visited, cols_visited) sm_matrix *A; sm_col *pcol; int *rows_visited; int *cols_visited; { sm_element *p; sm_row *prow; if (! pcol->flag) { pcol->flag = 1; (*cols_visited)++; if (*cols_visited == A->ncols) { return 1; } for(p = pcol->first_row; p != 0; p = p->next_row) { prow = sm_get_row(A, p->row_num); if (! prow->flag) { if (visit_row(A, prow, rows_visited, cols_visited)) { return 1; } } } } return 0; } int sm_block_partition(A, L, R) sm_matrix *A; sm_matrix **L, **R; { int cols_visited, rows_visited; register sm_row *prow; register sm_col *pcol; /* Avoid the trivial case */ if (A->nrows == 0) { return 0; } /* Reset the visited flags for each row and column */ for(prow = A->first_row; prow != 0; prow = prow->next_row) { prow->flag = 0; } for(pcol = A->first_col; pcol != 0; pcol = pcol->next_col) { pcol->flag = 0; } cols_visited = rows_visited = 0; if (visit_row(A, A->first_row, &rows_visited, &cols_visited)) { /* we found all of the rows */ return 0; } else { *L = sm_alloc(); *R = sm_alloc(); for(prow = A->first_row; prow != 0; prow = prow->next_row) { if (prow->flag) { copy_row(*L, prow); } else { copy_row(*R, prow); } } return 1; } } ABC_NAMESPACE_IMPL_END le>
path: root/demos/3rdparty/doom/d_event.h
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