1 files changed, 57 insertions, 0 deletions
diff --git a/cpp/src/broker/AccumulatedAck.cpp b/cpp/src/broker/AccumulatedAck.cpp
new file mode 100644
index 0000000000..ff471b0287
--- /dev/null
+++ b/cpp/src/broker/AccumulatedAck.cpp
@@ -0,0 +1,57 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "AccumulatedAck.h"
+
+#include <assert.h>
+
+using std::less_equal;
+using std::bind2nd;
+using namespace qpid::broker;
+
+void AccumulatedAck::update(uint64_t firstTag, uint64_t lastTag){
+    assert(firstTag<=lastTag);
+    if (firstTag <= range + 1) {
+        if (lastTag > range) range = lastTag;
+    } else {
+    	for (uint64_t tag = firstTag; tag<=lastTag; tag++)
+            individual.push_back(tag);
+    }
+}
+
+void AccumulatedAck::consolidate(){
+    individual.sort();
+    //remove any individual tags that are covered by range
+    individual.remove_if(bind2nd(less_equal<uint64_t>(), range));
+    //update range if possible (using <= allows for duplicates from overlapping ranges)
+    while (individual.front() <= range + 1) {
+        range = individual.front();
+        individual.pop_front();
+    }
+}
+
+void AccumulatedAck::clear(){
+    range = 0;
+    individual.clear();
+}
+
+bool AccumulatedAck::covers(uint64_t tag) const{
+    return tag <= range || find(individual.begin(), individual.end(), tag) != individual.end();
+}