From 783402f63a38ab02acbb9321ca54ef9bd2f43f22 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 12 Oct 2007 21:33:37 +0000
Subject:  r15731@catbus:  nickm | 2007-10-12 17:27:48 -0400  Move "sort a list
 of routerinfo_t" into its own function in routerlist.c

svn:r11903
---
 src/or/dirserv.c    | 19 +++++--------------
 src/or/routerlist.c | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+), 14 deletions(-)

(limited to 'src/or')

diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index d2e0d5e42..addb3f4fc 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -1695,17 +1695,6 @@ routerstatus_format_entry(char *buf, size_t buf_len,
   return 0;
 }
 
-/** Helper for sorting: compare two routerinfos by their identity
- * digest. */
-static int
-_compare_routerinfo_by_id_digest(const void **a, const void **b)
-{
-  routerinfo_t *first = *(routerinfo_t **)a, *second = *(routerinfo_t **)b;
-  return memcmp(first->cache_info.identity_digest,
-                second->cache_info.identity_digest,
-                DIGEST_LEN);
-}
-
 /** Helper for sorting: compares two routerinfos first by address, and then by
  * descending order of "usefulness".  (An authority is more useful than a
  * non-authority; a running router is more useful than a non-running router;
@@ -1754,7 +1743,9 @@ _compare_routerinfo_by_ip_and_bw(const void **a, const void **b)
 
   /* They're equal! Compare by identity digest, so there's a
    * deterministic order and we avoid flapping. */
-  return _compare_routerinfo_by_id_digest(a, b);
+  return memcmp(first->cache_info.identity_digest,
+                second->cache_info.identity_digest,
+                DIGEST_LEN);
 }
 
 /** Given a list of routerinfo_t in <b>routers</b>, return a new digestmap_t
@@ -1913,7 +1904,7 @@ generate_networkstatus_vote_obj(crypto_pk_env_t *private_key,
 
   routers = smartlist_create();
   smartlist_add_all(routers, rl->routers);
-  smartlist_sort(routers, _compare_routerinfo_by_id_digest);
+  routers_sort_by_identity(routers);
   omit_as_sybil = get_possible_sybil_list(routers);
 
   routerstatuses = smartlist_create();
@@ -2337,7 +2328,7 @@ generate_networkstatus_opinion(int v2)
 
   routers = smartlist_create();
   smartlist_add_all(routers, rl->routers);
-  smartlist_sort(routers, _compare_routerinfo_by_id_digest);
+  routers_sort_by_identity(routers);
 
   omit_as_sybil = get_possible_sybil_list(routers);
 
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index c974adb0f..d4e692cad 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -4403,3 +4403,21 @@ esc_router_info(routerinfo_t *router)
   return info;
 }
 
+/** Helper for sorting: compare two routerinfos by their identity
+ * digest. */
+static int
+_compare_routerinfo_by_id_digest(const void **a, const void **b)
+{
+  routerinfo_t *first = *(routerinfo_t **)a, *second = *(routerinfo_t **)b;
+  return memcmp(first->cache_info.identity_digest,
+                second->cache_info.identity_digest,
+                DIGEST_LEN);
+}
+
+/** Sort a list of routerinfo_t in ascending order of identity digest. */
+void
+routers_sort_by_identity(smartlist_t *routers)
+{
+  smartlist_sort(routers, _compare_routerinfo_by_id_digest);
+}
+
-- 
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