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Diffstat (limited to 'qpid/cpp/src/qpid/amqp/MapSizeCalculator.h')
-rw-r--r-- | qpid/cpp/src/qpid/amqp/MapSizeCalculator.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/amqp/MapSizeCalculator.h b/qpid/cpp/src/qpid/amqp/MapSizeCalculator.h new file mode 100644 index 0000000000..35c9ad732d --- /dev/null +++ b/qpid/cpp/src/qpid/amqp/MapSizeCalculator.h @@ -0,0 +1,73 @@ +#ifndef QPID_AMQP_MAPSIZECALCULATOR_H +#define QPID_AMQP_MAPSIZECALCULATOR_H + +/* + * + * 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 "MapHandler.h" +#include <cstring> + +namespace qpid { +namespace amqp { +struct Descriptor; + +/** + * Utility to calculate the encoded size for map data + */ +class MapSizeCalculator : public MapHandler +{ + public: + MapSizeCalculator(); + void handleVoid(const CharSequence& key); + void handleBool(const CharSequence& key, bool value); + void handleUint8(const CharSequence& key, uint8_t value); + void handleUint16(const CharSequence& key, uint16_t value); + void handleUint32(const CharSequence& key, uint32_t value); + void handleUint64(const CharSequence& key, uint64_t value); + void handleInt8(const CharSequence& key, int8_t value); + void handleInt16(const CharSequence& key, int16_t value); + void handleInt32(const CharSequence& key, int32_t value); + void handleInt64(const CharSequence& key, int64_t value); + void handleFloat(const CharSequence& key, float value); + void handleDouble(const CharSequence& key, double value); + void handleString(const CharSequence& key, const CharSequence& value, const CharSequence& encoding); + /** + * @returns the encoded size of the map entries (i.e. does not + * include the count field, typecode or any other metadata for the + * map as a whole) + */ + size_t getSize() const; + size_t getCount() const; + /** + * @returns the total encoded size for a map containing the + * handled values (i.e. including the metadata for the map as a + * whole) + */ + size_t getTotalSizeRequired(const Descriptor* d=0) const; + private: + size_t size; + size_t count; + + void handleKey(const CharSequence& key); + static size_t getEncodedSize(const CharSequence&); +}; +}} // namespace qpid::amqp + +#endif /*!QPID_AMQP_MAPSIZECALCULATOR_H*/ |