| /* |
| * 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 _DECAF_IO_BUFFEREDINPUTSTREAM_H_ |
| #define _DECAF_IO_BUFFEREDINPUTSTREAM_H_ |
| |
| #include <decaf/util/Config.h> |
| #include <decaf/io/FilterInputStream.h> |
| #include <decaf/lang/exceptions/IllegalArgumentException.h> |
| |
| namespace decaf{ |
| namespace io{ |
| |
| /** |
| * A wrapper around another input stream that performs |
| * a buffered read, where it reads more data than it needs |
| * in order to reduce the number of io operations on the |
| * input stream. |
| */ |
| class DECAF_API BufferedInputStream : public FilterInputStream { |
| private: |
| |
| int pos; |
| int count; |
| int markLimit; |
| int markPos; |
| int bufferSize; |
| unsigned char* buff; |
| |
| // Proxy to the actual buffer, when NULL it signals this stream is closed. |
| // the actual buffer is deleted in the destructor. |
| unsigned char* proxyBuffer; |
| |
| private: |
| |
| BufferedInputStream(const BufferedInputStream&); |
| BufferedInputStream& operator=(const BufferedInputStream&); |
| |
| public: |
| |
| /** |
| * Constructor |
| * |
| * @param stream |
| * The target input stream to buffer. |
| * @param own |
| * Indicates if we own the stream object, defaults to false. |
| */ |
| BufferedInputStream(InputStream* stream, bool own = false); |
| |
| /** |
| * Constructor |
| * |
| * @param stream |
| * The target input stream to buffer. |
| * @param bufferSize |
| * The size in bytes to allocate for the internal buffer. |
| * @param own |
| * Indicates if we own the stream object, defaults to false. |
| * |
| * @throws IllegalArgumentException is the size is zero or negative. |
| */ |
| BufferedInputStream(InputStream* stream, int bufferSize, bool own = false); |
| |
| virtual ~BufferedInputStream(); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual int available() const; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual void close(); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual long long skip(long long num); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual void mark(int readLimit); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual void reset(); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| virtual bool markSupported() const { |
| return true; |
| } |
| |
| protected: |
| |
| virtual int doReadByte(); |
| |
| virtual int doReadArrayBounded(unsigned char* buffer, int size, int offset, int length); |
| |
| private: |
| |
| int bufferData(InputStream* stream, unsigned char*& buffer); |
| |
| }; |
| |
| }} |
| |
| #endif /*_DECAF_IO_BUFFEREDINPUTSTREAM_H_*/ |