comparison: src/tree.c
src/tree.c
- changeset 909
- f4e00bb3f3b2
- parent 908
- f49f8a7060aa
- child 910
- 5c2af036103f
equal
deleted
inserted
replaced
| 908:f49f8a7060aa | 909:f4e00bb3f3b2 |
|---|---|
| 898 cxIteratorNext(visitor); | 898 cxIteratorNext(visitor); |
| 899 } | 899 } |
| 900 return visitor.depth; | 900 return visitor.depth; |
| 901 } | 901 } |
| 902 | 902 |
| 903 int cxTreeRemove(CxTree *tree, void *node) { | 903 int cxTreeRemove( |
| 904 CxTree *tree, | |
| 905 void *node, | |
| 906 cx_tree_relink_func relink_func | |
| 907 ) { | |
| 904 if (node == tree->root) return 1; | 908 if (node == tree->root) return 1; |
| 905 | 909 |
| 906 | 910 // determine the new parent |
| 911 ptrdiff_t loc_parent = tree->loc_parent; | |
| 912 void *new_parent = tree_parent(node); | |
| 913 | |
| 914 // first, unlink from the parent | |
| 915 cx_tree_unlink(node, cx_tree_node_layout(tree)); | |
| 916 | |
| 917 // then relink each child | |
| 918 ptrdiff_t loc_children = tree->loc_children; | |
| 919 ptrdiff_t loc_next = tree->loc_next; | |
| 920 void *child = tree_children(node); | |
| 921 while (child != NULL) { | |
| 922 // forcibly set the parent to NULL - we do not use the unlink function | |
| 923 // because that would unnecessarily modify the children linked list | |
| 924 tree_parent(child) = NULL; | |
| 925 | |
| 926 // update contents, if required | |
| 927 if (relink_func != NULL) { | |
| 928 relink_func(child, node, new_parent); | |
| 929 } | |
| 930 | |
| 931 // link to new parent | |
| 932 cx_tree_link(new_parent, child, cx_tree_node_layout(tree)); | |
| 933 | |
| 934 // proceed to next child | |
| 935 child = tree_next(child); | |
| 936 } | |
| 937 | |
| 938 // clear the linked list of the removed node | |
| 939 tree_children(node) = NULL; | |
| 940 ptrdiff_t loc_last_child = tree->loc_last_child; | |
| 941 if (loc_last_child >= 0) tree_last_child(node) = NULL; | |
| 942 | |
| 943 // the tree now has one member less | |
| 944 tree->size--; | |
| 907 | 945 |
| 908 return 0; | 946 return 0; |
| 909 } | 947 } |
| 910 | 948 |
| 911 void cxTreeRemoveSubtree(CxTree *tree, void *node) { | 949 void cxTreeRemoveSubtree(CxTree *tree, void *node) { |
