commit 128582cc1f9fd363f3fb2a96b61fde1701a56970 Author: Nick Mathewson nickm@torproject.org Date: Sun Apr 3 19:13:36 2011 -0400

Simplify calls to routerset_equal

The routerset_equal function explicitly handles NULL inputs, so there's no need to check inputs for NULL before calling it.

Also fix a bug in routerset_equal where a non-NULL routerset with no entries didn't get counted as equal to a NULL routerset. This was untriggerable, I think, but potentially annoying down the road. --- src/or/config.c | 14 +++++--------- src/or/routerlist.c | 11 +++++++---- 2 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/src/or/config.c b/src/or/config.c index 404e648..44cde85 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -1260,15 +1260,11 @@ options_act(or_options_t *old_options) /* Check for transitions that need action. */ if (old_options) { if ((options->UseEntryGuards && !old_options->UseEntryGuards) || - (options->ExcludeNodes && - !routerset_equal(old_options->ExcludeNodes,options->ExcludeNodes)) || - (options->ExcludeExitNodes && - !routerset_equal(old_options->ExcludeExitNodes, - options->ExcludeExitNodes)) || - (options->EntryNodes && - !routerset_equal(old_options->EntryNodes, options->EntryNodes)) || - (options->ExitNodes && - !routerset_equal(old_options->ExitNodes, options->ExitNodes)) || + !routerset_equal(old_options->ExcludeNodes,options->ExcludeNodes) || + !routerset_equal(old_options->ExcludeExitNodes, + options->ExcludeExitNodes) || + !routerset_equal(old_options->EntryNodes, options->EntryNodes) || + !routerset_equal(old_options->ExitNodes, options->ExitNodes) || options->StrictNodes != old_options->StrictNodes) { log_info(LD_CIRC, "Changed to using entry guards, or changed preferred or " diff --git a/src/or/routerlist.c b/src/or/routerlist.c index a9a216b..d5e8a6b 100644 --- a/src/or/routerlist.c +++ b/src/or/routerlist.c @@ -5473,14 +5473,12 @@ routerset_needs_geoip(const routerset_t *set) return set && smartlist_len(set->country_names); }

-#if 0 /** Return true iff there are no entries in <b>set</b>. */ static int routerset_is_empty(const routerset_t *set) { return !set || smartlist_len(set->list) == 0; } -#endif

/** Helper. Return true iff <b>set</b> contains a router based on the other * provided fields. Return higher values for more specific subentries: a @@ -5659,10 +5657,15 @@ routerset_to_string(const routerset_t *set) int routerset_equal(const routerset_t *old, const routerset_t *new) { - if (old == NULL && new == NULL) + if (routerset_is_empty(old) && routerset_is_empty(new)) { + /* Two empty sets are equal */ return 1; - else if (old == NULL || new == NULL) + } else if (routerset_is_empty(old) || routerset_is_empty(new)) { + /* An empty set is equal to nothing else. */ return 0; + } + tor_assert(old != NULL); + tor_assert(new != NULL);

if (smartlist_len(old->list) != smartlist_len(new->list)) return 0;