static int RTreeInsertNode (node_t n, int level, rect_t r, void *data, node_t *new_node) { int i; node_t n2; branch_t b; assert(n && new_node); assert(level >= 0 && level <= n->level); if (n->level > level) { i = RTreePickBranch(r,n); if (!RTreeInsertNode((node_t) n->branch[i].child, level, r, data,&n2)) /* not split */ { n->branch[i].mbr = RectCombine(r,n->branch[i].mbr); return FALSE; } else /* node split */ { n->branch[i].mbr = RTreeNodeCover(n->branch[i].child); b.child = n2; b.mbr = RTreeNodeCover(n2); return RTreeAddBranch(n, b, new_node); } } else /*insert level*/ { b.mbr = r; b.child = data; return RTreeAddBranch(n, b, new_node); } }
/* * Inserts a new data rectangle into the index structure. * Recursively descends tree, propagates splits back up. * Returns 0 if node was not split. Old node updated. * If node was split, returns 1 and sets the pointer pointed to by * new_node to point to the new node. Old node updated to become one of two. * The level argument specifies the number of steps up from the leaf * level to insert; e.g. a data rectangle goes in at level = 0. */ static int RTreeInsertRect2(struct Rect *r, long tid, struct Node *n, struct Node **new_node, int level) { /* register struct Rect *r = R; register long tid = Tid; register struct Node *n = N, **new_node = New_node; register int level = Level; */ register int i; struct Branch b; struct Node *n2; assert(r && n && new_node); assert(level >= 0 && level <= n->level); /* Still above level for insertion, go down tree recursively */ if (n->level > level) { i = RTreePickBranch(r, n); if (!RTreeInsertRect2(r, tid, n->branch[i].child, &n2, level)) { /* child was not split */ n->branch[i].rect = RTreeCombineRect(r,&(n->branch[i].rect)); return 0; } else /* child was split */ { n->branch[i].rect = RTreeNodeCover(n->branch[i].child); b.child = n2; b.rect = RTreeNodeCover(n2); return RTreeAddBranch(&b, n, new_node); } } /* Have reached level for insertion. Add rect, split if necessary */ else if (n->level == level) { b.rect = *r; b.child = (struct Node *) (tid); /* child field of leaves contains tid of data record */ return RTreeAddBranch(&b, n, new_node); } else { /* Not supposed to happen */ assert (FALSE); return 0; } }
/* * Inserts a new data rectangle into the index structure. * Non-recursively descends tree, propagates splits back up. * Returns 0 if node was not split. Old node updated. * If node was split, returns 1 and sets the pointer pointed to by * new_node to point to the new node. Old node updated to become one of two. * The level argument specifies the number of steps up from the leaf * level to insert; e.g. a data rectangle goes in at level = 0. */ static int RTreeInsertRect2F(struct RTree_Rect *r, union RTree_Child child, int level, struct RTree_Node *newnode, off_t *newnode_pos, struct RTree *t, struct RTree_ListBranch **ee, char *overflow) { int i, currlevel; struct RTree_Node *n, *n2; struct RTree_Rect *cover; int top = 0, down = 0; int result; struct RTree_Branch *b = &(t->tmpb2); struct nstack *s = t->ns; struct RTree_Rect *nr = &(t->orect); n2 = newnode; /* add root node position to stack */ currlevel = t->rootlevel; s[top].pos = t->rootpos; s[top].sn = RTreeGetNode(s[top].pos, currlevel, t); /* go down to level of insertion */ while (s[top].sn->level > level) { n = s[top].sn; currlevel = s[top].sn->level - 1; i = RTreePickBranch(r, n, t); s[top++].branch_id = i; /* add next node to stack */ s[top].pos = n->branch[i].child.pos; s[top].sn = RTreeGetNode(s[top].pos, currlevel, t); } /* Have reached level for insertion. Add rect, split if necessary */ RTreeCopyRect(&(b->rect), r, t); /* child field of leaves contains tid of data record */ b->child = child; /* add branch, may split node or remove branches */ cover = NULL; if (top) cover = &(s[top - 1].sn->branch[s[top - 1].branch_id].rect); result = RTreeAddBranch(b, s[top].sn, &n2, ee, cover, overflow, t); /* update node */ RTreeNodeChanged(s[top].sn, s[top].pos, t); /* write out new node if node was split */ if (result == 1) { *newnode_pos = RTreeGetNodePos(t); RTreeWriteNode(n2, t); t->n_nodes++; } /* go back up */ while (top) { down = top--; i = s[top].branch_id; if (result == 0) { /* branch was added */ if (RTreeExpandRect(&(s[top].sn->branch[i].rect), r, t)) { RTreeNodeChanged(s[top].sn, s[top].pos, t); } } else if (result == 2) { /* branches were removed */ /* get node cover of previous node */ RTreeNodeCover(s[down].sn, nr, t); /* rewrite rect */ if (!RTreeCompareRect(nr, &(s[top].sn->branch[i].rect), t)) { RTreeCopyRect(&(s[top].sn->branch[i].rect), nr, t); RTreeNodeChanged(s[top].sn, s[top].pos, t); } } else if (result == 1) { /* node was split */ /* get node cover of previous node */ RTreeNodeCover(s[down].sn, &(s[top].sn->branch[i].rect), t); /* add new branch for new node previously added by RTreeAddBranch() */ b->child.pos = *newnode_pos; RTreeNodeCover(n2, &(b->rect), t); /* add branch, may split node or remove branches */ cover = NULL; if (top) cover = &(s[top - 1].sn->branch[s[top - 1].branch_id].rect); result = RTreeAddBranch(b, s[top].sn, &n2, ee, cover, overflow, t); /* update node */ RTreeNodeChanged(s[top].sn, s[top].pos, t); /* write out new node if node was split */ if (result == 1) { *newnode_pos = RTreeGetNodePos(t); RTreeWriteNode(n2, t); t->n_nodes++; } } } return result; }