With -Wsign-compare, compilers warn about a mismatching signedness
in comparisons in the function get_node_by_path().
Taking the difference between two pointers results in a signed ptrdiff_t
type, which mismatches the unsigned type returned by strlen().
Since "p" has been returned by a call to strchr() with "path" as its
argument, we know for sure that it's bigger than "path", so the
difference must be positive. So a cast to an unsigned type is valid.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
livetree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/livetree.c b/livetree.c
index cf2f63d..ef141a0 100644
--- a/livetree.c
+++ b/livetree.c
@@ -526,7 +526,7 @@ struct node *get_node_by_path(struct node *tree, const char *path)
p = strchr(path, '/');
for_each_child(tree, child) {
- if (p && strprefixeq(path, p - path, child->name))
+ if (p && strprefixeq(path, (size_t)(p - path), child->name))
return get_node_by_path(child, p+1);
else if (!p && streq(path, child->name))
return child;
--
2.17.5
