From 5483f79998c5a9705d453a713d11fb7591329ed4 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Wed, 25 Feb 2009 03:32:10 -0500 Subject: refactor find_ref_by_name() to accept const list Since it doesn't actually touch its argument, this makes sense. However, we still want to return a non-const version (which requires a cast) so that this: struct ref *a, *b; a = find_ref_by_name(b); works. Unfortunately, you can also silently strip the const from a variable: struct ref *a; const struct ref *b; a = find_ref_by_name(b); This is a classic C const problem because there is no way to say "return the type with the same constness that was passed to us"; we provide the same semantics as standard library functions like strchr. Signed-off-by: Jeff King Signed-off-by: Jay Soffian Signed-off-by: Junio C Hamano --- refs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'refs.c') diff --git a/refs.c b/refs.c index 6eb5f53846..b2a37e1185 100644 --- a/refs.c +++ b/refs.c @@ -1628,10 +1628,10 @@ int update_ref(const char *action, const char *refname, return 0; } -struct ref *find_ref_by_name(struct ref *list, const char *name) +struct ref *find_ref_by_name(const struct ref *list, const char *name) { for ( ; list; list = list->next) if (!strcmp(list->name, name)) - return list; + return (struct ref *)list; return NULL; } -- cgit v1.2.3