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#ifndef QPID_FRAMING_RESIZABLEBUFFER_H
#define QPID_FRAMING_RESIZABLEBUFFER_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 "qpid/framing/Buffer.h"
#include <vector>
namespace qpid {
namespace framing {
/**
* A buffer that maintains its own storage and can be resized,
* keeping any data already written to the buffer.
*/
class ResizableBuffer : public Buffer
{
public:
ResizableBuffer(size_t initialSize) : store(initialSize) {
static_cast<Buffer&>(*this) = Buffer(&store[0], store.size());
}
void resize(size_t newSize) {
size_t oldPos = getPosition();
store.resize(newSize);
static_cast<Buffer&>(*this) = Buffer(&store[0], store.size());
setPosition(oldPos);
}
/** Make sure at least n bytes are available */
void makeAvailable(size_t n) {
if (n > available())
resize(getSize() + n - available());
}
private:
std::vector<char> store;
};
}} // namespace qpid::framing
#endif /*!QPID_FRAMING_RESIZABLEBUFFER_H*/
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