91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/** Wraps another input stream, and reads from it using an intermediate buffer
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If you're using an input stream such as a file input stream, and making lots of
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small read accesses to it, it's probably sensible to wrap it in one of these,
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so that the source stream gets accessed in larger chunk sizes, meaning less
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work for the underlying stream.
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@tags{Core}
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*/
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class JUCE_API BufferedInputStream : public InputStream
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{
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public:
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//==============================================================================
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/** Creates a BufferedInputStream from an input source.
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@param sourceStream the source stream to read from
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@param bufferSize the size of reservoir to use to buffer the source
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@param deleteSourceWhenDestroyed whether the sourceStream that is passed in should be
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deleted by this object when it is itself deleted.
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*/
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BufferedInputStream (InputStream* sourceStream,
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int bufferSize,
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bool deleteSourceWhenDestroyed);
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/** Creates a BufferedInputStream from an input source.
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@param sourceStream the source stream to read from - the source stream must not
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be deleted until this object has been destroyed.
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@param bufferSize the size of reservoir to use to buffer the source
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*/
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BufferedInputStream (InputStream& sourceStream, int bufferSize);
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/** Destructor.
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This may also delete the source stream, if that option was chosen when the
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buffered stream was created.
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*/
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~BufferedInputStream();
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//==============================================================================
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/** Returns the next byte that would be read by a call to readByte() */
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char peekByte();
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int64 getTotalLength() override;
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int64 getPosition() override;
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bool setPosition (int64 newPosition) override;
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int read (void* destBuffer, int maxBytesToRead) override;
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String readString() override;
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bool isExhausted() override;
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private:
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//==============================================================================
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OptionalScopedPointer<InputStream> source;
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int bufferSize;
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int64 position, lastReadPos = 0, bufferStart, bufferOverlap = 128;
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HeapBlock<char> buffer;
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bool ensureBuffered();
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BufferedInputStream)
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};
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} // namespace juce
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