MemoryInputStream.h

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/*
  ==============================================================================
 
   This file is part of the Water library.
   Copyright (c) 2016 - ROLI Ltd.
   Copyright (C) 2021-2022 Filipe Coelho <falktx@falktx.com>
 
   Permission is granted to use this software 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.
 
   THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
   FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
   OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
   USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
   OF THIS SOFTWARE.
 
  ==============================================================================
*/
 
#ifndef WATER_MEMORYINPUTSTREAM_H_INCLUDED
#define WATER_MEMORYINPUTSTREAM_H_INCLUDED
 
#include "InputStream.h"
#include "../memory/MemoryBlock.h"
#include "../memory/HeapBlock.h"
 
namespace water {
 
//==============================================================================
class MemoryInputStream  : public InputStream
{
public:
    //==============================================================================
    MemoryInputStream (const void* sourceData,
                       size_t sourceDataSize,
                       bool keepInternalCopyOfData);

    MemoryInputStream (const MemoryBlock& data,
                       bool keepInternalCopyOfData);

    ~MemoryInputStream();

    const void* getData() const noexcept        { return data; }

    size_t getDataSize() const noexcept         { return dataSize; }
 
    //==============================================================================
    int64 getPosition() override;
    bool setPosition (int64 pos) override;
    int64 getTotalLength() override;
    bool isExhausted() override;
    int read (void* destBuffer, int maxBytesToRead) override;
 
private:
    //==============================================================================
    const void* data;
    size_t dataSize, position;
    HeapBlock<char> internalCopy;
 
    void createInternalCopy();
 
    CARLA_DECLARE_NON_COPYABLE (MemoryInputStream)
};
 
}
 
#endif   // WATER_MEMORYINPUTSTREAM_H_INCLUDED