| /* |
| * 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. |
| */ |
|
|
| #ifndef MEMORYINPUTSTREAM_H_INCLUDED
|
| #define MEMORYINPUTSTREAM_H_INCLUDED
|
|
|
| #include "InputStream.h"
|
|
|
| namespace rocketmq {
|
| //==============================================================================
|
| /**
|
| Allows a block of data to be accessed as a stream.
|
|
|
| This can either be used to refer to a shared block of memory, or can make
|
| its
|
| own internal copy of the data when the MemoryInputStream is created.
|
| */
|
| class ROCKETMQCLIENT_API MemoryInputStream : public InputStream {
|
| public:
|
| //==============================================================================
|
| /** Creates a MemoryInputStream.
|
|
|
| @param sourceData the block of data to use as the stream's
|
| source
|
| @param sourceDataSize the number of bytes in the source data
|
| block
|
| @param keepInternalCopyOfData if false, the stream will just keep a
|
| pointer to
|
| the source data, so this data shouldn't be
|
| changed
|
| for the lifetime of the stream; if this
|
| parameter is
|
| true, the stream will make its own copy of
|
| the
|
| data and use that.
|
| */
|
| MemoryInputStream(const void* sourceData, size_t sourceDataSize,
|
| bool keepInternalCopyOfData);
|
|
|
| /** Creates a MemoryInputStream.
|
|
|
| @param data a block of data to use as the stream's
|
| source
|
| @param keepInternalCopyOfData if false, the stream will just keep a
|
| reference to
|
| the source data, so this data shouldn't be
|
| changed
|
| for the lifetime of the stream; if this
|
| parameter is
|
| true, the stream will make its own copy of
|
| the
|
| data and use that.
|
| */
|
| MemoryInputStream(const MemoryBlock& data, bool keepInternalCopyOfData);
|
|
|
| /** Destructor. */
|
| ~MemoryInputStream();
|
|
|
| /** Returns a pointer to the source data block from which this stream is
|
| * reading. */
|
| const void* getData() const { return data; }
|
|
|
| /** Returns the number of bytes of source data in the block from which this
|
| * stream is reading. */
|
| size_t getDataSize() const { return dataSize; }
|
|
|
| //==============================================================================
|
| int64 getPosition();
|
| bool setPosition(int64 pos);
|
| int64 getTotalLength();
|
| bool isExhausted();
|
| int read(void* destBuffer, int maxBytesToRead);
|
|
|
| private:
|
| //==============================================================================
|
| const void* data;
|
| size_t dataSize, position;
|
| char* internalCopy;
|
|
|
| void createInternalCopy();
|
| };
|
| }
|
| #endif
|