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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
//==============================================================================
/**
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.
@tags{Core}
*/
class JUCE_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);
/** Creates a stream by moving from a MemoryBlock. */
MemoryInputStream (MemoryBlock&& blockToTake);
/** Destructor. */
~MemoryInputStream() override;
/** Returns a pointer to the source data block from which this stream is reading. */
const void* getData() const noexcept { return data; }
/** Returns the number of bytes of source data in the block from which this stream is reading. */
size_t getDataSize() const noexcept { return dataSize; }
//==============================================================================
int64 getPosition() override;
bool setPosition (int64) override;
int64 getTotalLength() override;
bool isExhausted() override;
int read (void* destBuffer, int maxBytesToRead) override;
void skipNextBytes (int64 numBytesToSkip) override;
private:
//==============================================================================
const void* data;
size_t dataSize, position = 0;
MemoryBlock internalCopy;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MemoryInputStream)
};
} // namespace juce
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