AuroraRuntime/Source/IO/Character/BufferedCharacterConsumer.cpp

/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: BufferedCharacterConsumer.cpp
    Date: 2022-1-29
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "BufferedCharacterConsumer.hpp"

namespace Aurora::IO::Character
{
    BufferedCharacterConsumer::BufferedCharacterConsumer(const AuSPtr<ICharacterProvider> &provider) : provider_(provider)
    {
       
    }

    bool BufferedCharacterConsumer::HasBufferedNext() const
    {
        return this->hasNext_;
    }

    AuUInt8 BufferedCharacterConsumer::NextBufferedByte() const
    {
        return this->peeked_;
    }

    bool BufferedCharacterConsumer::PeekNext(AuUInt8 &out)
    {
        AU_LOCK_GUARD(this->lock_);

        if (!this->hasNext_)
        {
            this->hasNext_ = provider_->GetByte(this->peeked_);
        }

        if (!this->hasNext_)
        {
            this->hasFailed_ = true;
            return false;
        }

        out = this->peeked_;
        return this->hasNext_;
    }

    AuUInt8 BufferedCharacterConsumer::GetCurrent()
    {
        AU_LOCK_GUARD(this->lock_);

        return this->cur_;
    }

    bool BufferedCharacterConsumer::Next(AuUInt8 &out)
    {
        AU_LOCK_GUARD(this->lock_);

        // autism security
        if (this->hasFailed_)
        {
            return false;
        }

        if (this->hasNext_)
        {
            out = this->peeked_;
            this->cur_ = out;
            this->hasNext_ = false;
            return true;
        }

        if (this->provider_->GetByte(out))
        {
            this->cur_ = out;
            return true;
        }

        this->hasFailed_ = true;
        return false;
    }

    IBufferedCharacterConsumer *BufferConsumerFromProviderNew(const AuSPtr<ICharacterProvider> &provider)
    {
        if (!provider)
        {
            SysPushErrorArg("Missing ICharacterProvider");
            return {};
        }

        return _new BufferedCharacterConsumer(provider);
    }

    void BufferConsumerFromProviderRelease(IBufferedCharacterConsumer *me)
    {
        AuSafeDelete<BufferedCharacterConsumer *>(me);
    }
}