From 23dee69f53cf5024ca79e0b707dcb03c63f33bef Mon Sep 17 00:00:00 2001 From: Eric Wong Date: Sun, 6 Oct 2019 23:30:41 +0000 Subject: OFFSETOF_VAR macro to simplify hashmap iterators While we cannot rely on a `__typeof__' operator being portable to use with `offsetof'; we can calculate the pointer offset using an existing pointer and the address of a member using pointer arithmetic for compilers without `__typeof__'. This allows us to simplify usage of hashmap iterator macros by not having to specify a type when a pointer of that type is already given. In the future, list iterator macros (e.g. list_for_each_entry) may also be implemented using OFFSETOF_VAR to save hackers the trouble of using container_of/list_entry macros and without relying on non-portable `__typeof__'. v3: use `__typeof__' to avoid clang warnings Signed-off-by: Eric Wong Reviewed-by: Derrick Stolee Signed-off-by: Junio C Hamano --- name-hash.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'name-hash.c') diff --git a/name-hash.c b/name-hash.c index c86fe0f1df..3cda22b657 100644 --- a/name-hash.c +++ b/name-hash.c @@ -714,8 +714,7 @@ struct cache_entry *index_file_exists(struct index_state *istate, const char *na ce = hashmap_get_entry_from_hash(&istate->name_hash, hash, NULL, struct cache_entry, ent); - hashmap_for_each_entry_from(&istate->name_hash, ce, - struct cache_entry, ent) { + hashmap_for_each_entry_from(&istate->name_hash, ce, ent) { if (same_name(ce, name, namelen, icase)) return ce; } -- cgit v1.2.3