juce_MemoryOutputStream.h

/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - 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
{
 
//==============================================================================
class JUCE_API  MemoryOutputStream  : public OutputStream
{
public:
    //==============================================================================
    MemoryOutputStream (size_t initialSize = 256);

    MemoryOutputStream (MemoryBlock& memoryBlockToWriteTo,
                        bool appendToExistingBlockContent);

    MemoryOutputStream (void* destBuffer, size_t destBufferSize);

    ~MemoryOutputStream() override;
 
    //==============================================================================
    const void* getData() const noexcept;

    size_t getDataSize() const noexcept                 { return size; }

    void reset() noexcept;

    void preallocate (size_t bytesToPreallocate);

    bool appendUTF8Char (juce_wchar character);

    String toUTF8() const;

    String toString() const;

    MemoryBlock getMemoryBlock() const;
 
    //==============================================================================
    void flush() override;
 
    bool write (const void*, size_t) override;
    int64 getPosition() override                                 { return (int64) position; }
    bool setPosition (int64) override;
    int64 writeFromInputStream (InputStream&, int64 maxNumBytesToWrite) override;
    bool writeRepeatedByte (uint8 byte, size_t numTimesToRepeat) override;
 
private:
    //==============================================================================
    MemoryBlock* const blockToUse = nullptr;
    MemoryBlock internalBlock;
    void* externalData = nullptr;
    size_t position = 0, size = 0, availableSize = 0;
 
    void trimExternalBlockSize();
    char* prepareToWrite (size_t);
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MemoryOutputStream)
};

OutputStream& JUCE_CALLTYPE operator<< (OutputStream& stream, const MemoryOutputStream& streamToRead);
 
} // namespace juce