Instantaneous ops/sec figure in INFO output.

[redis.git] / src / t_hash.c

diff --git a/src/t_hash.c b/src/t_hash.c
index 8ee5485c1ad86f877d6f24e6bce98ca461f7f172..f97fc9926a8078d9830268f8098b4ab925403bc9 100644 (file)
--- a/src/t_hash.c
+++ b/src/t_hash.c
@@ -320,7 +320,7 @@ void hmsetCommand(redisClient *c) {
 }
 
 void hincrbyCommand(redisClient *c) {
-    long long value, incr;
+    long long value, incr, oldvalue;
     robj *o, *current, *new;
 
     if (getLongLongFromObjectOrReply(c,c->argv[3],&incr,NULL) != REDIS_OK) return;
@@ -336,6 +336,12 @@ void hincrbyCommand(redisClient *c) {
         value = 0;
     }
 
+    oldvalue = value;
+    if ((incr < 0 && oldvalue < 0 && incr < (LLONG_MIN-oldvalue)) ||
+        (incr > 0 && oldvalue > 0 && incr > (LLONG_MAX-oldvalue))) {
+        addReplyError(c,"increment or decrement would overflow");
+        return;
+    }
     value += incr;
     new = createStringObjectFromLongLong(value);
     hashTypeTryObjectEncoding(o,&c->argv[2],NULL);