merged code from 184d74ab, 4774a53b, f483ce5f to new file structure

[redis.git] / src / t_zset.c

diff --git a/src/t_zset.c b/src/t_zset.c
index de32a8eedf7667c4795de5446dce9aa11c359bcb..26a80e994f793e7cb64e92901895229380e0e15a 100644 (file)
--- a/src/t_zset.c
+++ b/src/t_zset.c
@@ -497,9 +497,9 @@ void zremrangebyrankCommand(redisClient *c) {
     if (start < 0) start = llen+start;
     if (end < 0) end = llen+end;
     if (start < 0) start = 0;
-    if (end < 0) end = 0;
 
-    /* indexes sanity checks */
+    /* Invariant: start >= 0, so this test will be true when end < 0.
+     * The range is empty when start > end or start >= length. */
     if (start > end || start >= llen) {
         addReply(c,shared.czero);
         return;
@@ -750,11 +750,10 @@ void zrangeGenericCommand(redisClient *c, int reverse) {
     if (start < 0) start = llen+start;
     if (end < 0) end = llen+end;
     if (start < 0) start = 0;
-    if (end < 0) end = 0;
 
-    /* indexes sanity checks */
+    /* Invariant: start >= 0, so this test will be true when end < 0.
+     * The range is empty when start > end or start >= length. */
     if (start > end || start >= llen) {
-        /* Out of range start or start > end result in empty list */
         addReply(c,shared.emptymultibulk);
         return;
     }