AStrongByteBufferInputStream.h

#pragma once
 
#include "ISeekableInputStream.h"
#include "AUI/Common/AByteBuffer.h"
#include "AUI/Url/AUrl.h"

class API_AUI_CORE AStrongByteBufferInputStream: public ISeekableInputStream {
private:
    std::variant<AByteBuffer, _<AByteBuffer>> mRef;
    size_t mReadPos = 0;
 
public:
    static _<AStrongByteBufferInputStream> fromUrl(const AUrl& url);
 
    explicit AStrongByteBufferInputStream(AByteBuffer buffer) noexcept: mRef(std::move(buffer)) {
 
    }
 
    explicit AStrongByteBufferInputStream(_<AByteBuffer> buffer) noexcept: mRef(std::move(buffer)) {
 
    }
    ~AStrongByteBufferInputStream() override = default;
 
    bool isEof() override;
 
    void seek(std::streamoff offset, std::ios::seekdir seekDir) override;
 
    size_t tell() override;
 
    size_t read(char* dst, size_t size) override;
 
    [[nodiscard]]
    AByteBuffer& buffer() noexcept {
        return std::visit(aui::lambda_overloaded {
            [](AByteBuffer& b) -> AByteBuffer& {
                return b;
            },
            [](_<AByteBuffer>& b) -> AByteBuffer& {
                return *b;
            },
        }, mRef);
    }
};

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