---
ptrlist.c | 32 ++++++++++++++++++++++++++++++++
ptrlist.h | 2 ++
2 files changed, 34 insertions(+)
diff --git a/ptrlist.c b/ptrlist.c
index 5798aec43..031c53262 100644
--- a/ptrlist.c
+++ b/ptrlist.c
@@ -273,3 +273,35 @@ int ptr_cur_beg(struct ptr_cur *cur, struct ptr_list *head)
cur->n = -1;
return 1;
}
+
+int ptr_cur_prev(struct ptr_cur *cur)
+{
+ do {
+ struct ptr_list *curl = cur->l;
+
+ if (--cur->n >= 0)
+ return 1;
+
+ if (curl == cur->h)
+ break;
+ curl = curl->prev;
+ cur->l = curl;
+ cur->n = curl->nr;
+ } while (1);
+
+ return 0;
+}
+
+int ptr_cur_end(struct ptr_cur *cur, struct ptr_list *head)
+{
+ struct ptr_list *prev;
+
+ if (!head)
+ return 0;
+
+ prev = head->prev;
+ cur->h = head;
+ cur->l = prev;
+ cur->n = prev->nr;
+ return 1;
+}
diff --git a/ptrlist.h b/ptrlist.h
index b46967c58..883cca952 100644
--- a/ptrlist.h
+++ b/ptrlist.h
@@ -53,6 +53,8 @@ extern int linearize_ptr_list(struct ptr_list *, void **, int);
int ptr_cur_beg(struct ptr_cur *cur, struct ptr_list *head);
int ptr_cur_next(struct ptr_cur *cur);
+int ptr_cur_end(struct ptr_cur *cur, struct ptr_list *head);
+int ptr_cur_prev(struct ptr_cur *cur);
/*
* Hey, who said that you can't do overloading in C?
--
2.13.0
--
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