diff options
| -rw-r--r-- | sys/sys/tree.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sys/sys/tree.h b/sys/sys/tree.h index 44c0c99..1cce727 100644 --- a/sys/sys/tree.h +++ b/sys/sys/tree.h @@ -737,9 +737,14 @@ name##_RB_MINMAX(struct name *head, int val) \ (x) != NULL; \ (x) = name##_RB_NEXT(x)) +#define RB_FOREACH_FROM(x, name, y) \ + for ((x) = (y); \ + ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \ + (x) = (y)) + #define RB_FOREACH_SAFE(x, name, head, y) \ for ((x) = RB_MIN(name, head); \ - (x) != NULL && ((y) = name##_RB_NEXT(x)); \ + ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \ (x) = (y)) #define RB_FOREACH_REVERSE(x, name, head) \ @@ -747,4 +752,14 @@ name##_RB_MINMAX(struct name *head, int val) \ (x) != NULL; \ (x) = name##_RB_PREV(x)) +#define RB_FOREACH_REVERSE_FROM(x, name, y) \ + for ((x) = (y); \ + ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \ + (x) = (y)) + +#define RB_FOREACH_REVERSE_SAFE(x, name, head, y) \ + for ((x) = RB_MAX(name, head); \ + ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \ + (x) = (y)) + #endif /* _SYS_TREE_H_ */ |
