From cc00e5ce6b50cf4197e137b87a33209568b1e662 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Tue, 28 Aug 2018 17:22:55 -0400 Subject: convert hashmap comparison functions to oideq() The comparison functions used for hashmaps don't care about strict ordering; they only want to compare entries for equality. Let's use the oideq() function instead, which can potentially be better optimized. Note that unlike the previous patches mass-converting calls like "!oidcmp()", this patch could actually provide an improvement even with the current implementation. Those comparison functions are passed around as function pointers, so at compile-time the compiler cannot realize that the caller (which is in another file completely) will treat the return value as a boolean. Note that this does change the return values in quite a subtle way (it's still an int, but now the sign bit is irrelevant for ordering). Because of their funny hashmap-specific signature, it's unlikely that any of these static functions would be reused for more generic ordering. But to be double-sure, let's stop using "cmp" in their names. Calling them "eq" doesn't quite work either, because the hashmap convention is actually _inverted_. "0" means "same", and non-zero means "different". So I've called them "neq" by convention here. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- patch-ids.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'patch-ids.c') diff --git a/patch-ids.c b/patch-ids.c index 8f7c25d5db..960ea24054 100644 --- a/patch-ids.c +++ b/patch-ids.c @@ -28,14 +28,14 @@ int commit_patch_id(struct commit *commit, struct diff_options *options, /* * When we cannot load the full patch-id for both commits for whatever * reason, the function returns -1 (i.e. return error(...)). Despite - * the "cmp" in the name of this function, the caller only cares about + * the "neq" in the name of this function, the caller only cares about * the return value being zero (a and b are equivalent) or non-zero (a * and b are different), and returning non-zero would keep both in the * result, even if they actually were equivalent, in order to err on * the side of safety. The actual value being negative does not have * any significance; only that it is non-zero matters. */ -static int patch_id_cmp(const void *cmpfn_data, +static int patch_id_neq(const void *cmpfn_data, const void *entry, const void *entry_or_key, const void *unused_keydata) @@ -53,7 +53,7 @@ static int patch_id_cmp(const void *cmpfn_data, commit_patch_id(b->commit, opt, &b->patch_id, 0)) return error("Could not get patch ID for %s", oid_to_hex(&b->commit->object.oid)); - return oidcmp(&a->patch_id, &b->patch_id); + return !oideq(&a->patch_id, &b->patch_id); } int init_patch_ids(struct patch_ids *ids) @@ -63,7 +63,7 @@ int init_patch_ids(struct patch_ids *ids) ids->diffopts.detect_rename = 0; ids->diffopts.flags.recursive = 1; diff_setup_done(&ids->diffopts); - hashmap_init(&ids->patches, patch_id_cmp, &ids->diffopts, 256); + hashmap_init(&ids->patches, patch_id_neq, &ids->diffopts, 256); return 0; } -- cgit v1.2.3