1 files changed, 151 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/amqp/MapSizeCalculator.cpp b/qpid/cpp/src/qpid/amqp/MapSizeCalculator.cpp
new file mode 100644
index 0000000000..2da152108f
--- /dev/null
+++ b/qpid/cpp/src/qpid/amqp/MapSizeCalculator.cpp
@@ -0,0 +1,151 @@
+/*
+ *
+ * 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 "MapSizeCalculator.h"
+#include "CharSequence.h"
+#include "Descriptor.h"
+
+namespace qpid {
+namespace amqp {
+
+MapSizeCalculator::MapSizeCalculator() : size(0), count(0) {}
+
+void MapSizeCalculator::handleKey(const CharSequence& key)
+{
+    ++count;
+    size += getEncodedSize(key);
+}
+
+size_t MapSizeCalculator::getEncodedSize(const CharSequence& s)
+{
+    return 1/*typecode*/ + (s.size < 256 ? 1 : 4)/*size field*/ + s.size;
+}
+
+void MapSizeCalculator::handleVoid(const CharSequence& key)
+{
+    handleKey(key);
+    size += 1;/*typecode*/;
+}
+
+void MapSizeCalculator::handleBool(const CharSequence& key, bool /*value*/)
+{
+    handleKey(key);
+    size += 1;/*typecode*/;
+}
+
+void MapSizeCalculator::handleUint8(const CharSequence& key, uint8_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 1/*value*/;
+}
+
+void MapSizeCalculator::handleUint16(const CharSequence& key, uint16_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 2/*value*/;
+}
+
+void MapSizeCalculator::handleUint32(const CharSequence& key, uint32_t value)
+{
+    handleKey(key);
+    size += 1;/*typecode*/;
+    if (value > 0) {
+        if (value < 256) size += 1/*UINT_SMALL*/;
+        else size += 4/*UINT*/;
+    }//else UINT_ZERO
+}
+
+void MapSizeCalculator::handleUint64(const CharSequence& key, uint64_t value)
+{
+    handleKey(key);
+    size += 1;/*typecode*/;
+    if (value > 0) {
+        if (value < 256) size += 1/*ULONG_SMALL*/;
+        else size += 8/*ULONG*/;
+    }//else ULONG_ZERO
+}
+
+void MapSizeCalculator::handleInt8(const CharSequence& key, int8_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 1/*value*/;
+}
+
+void MapSizeCalculator::handleInt16(const CharSequence& key, int16_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 2/*value*/;
+}
+
+void MapSizeCalculator::handleInt32(const CharSequence& key, int32_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 4/*value*/;
+}
+
+void MapSizeCalculator::handleInt64(const CharSequence& key, int64_t /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 8/*value*/;
+}
+
+void MapSizeCalculator::handleFloat(const CharSequence& key, float /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 4/*value*/;
+}
+
+void MapSizeCalculator::handleDouble(const CharSequence& key, double /*value*/)
+{
+    handleKey(key);
+    size += 1/*typecode*/ + 8/*value*/;
+}
+
+void MapSizeCalculator::handleString(const CharSequence& key, const CharSequence& value, const CharSequence& /*encoding*/)
+{
+    handleKey(key);
+    size += getEncodedSize(value);
+}
+
+size_t MapSizeCalculator::getSize() const
+{
+    return size;
+}
+
+size_t MapSizeCalculator::getCount() const
+{
+    return count;
+}
+
+size_t MapSizeCalculator::getTotalSizeRequired(const Descriptor* d) const
+{
+    size_t result(size);
+    if (d) result += d->getSize();
+    result += 1/*typecode*/;
+    if (count * 2 > 255 || size > 255) {
+        result += 4/*size*/ + 4/*count*/;
+    } else {
+        result += 1/*size*/ + 1/*count*/;
+    }
+    return result;
+}
+
+
+}} // namespace qpid::amqp