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Directory :  /home/addictionfreeind/www/admin1/vendor/amphp/byte-stream/lib/Base64/

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Current File : /home/addictionfreeind/www/admin1/vendor/amphp/byte-stream/lib/Base64/Base64EncodingInputStream.php
<?php

namespace Amp\ByteStream\Base64;

use Amp\ByteStream\InputStream;
use Amp\Promise;
use function Amp\call;

final class Base64EncodingInputStream implements InputStream
{
    /** @var InputStream */
    private $source;

    /** @var string|null */
    private $buffer = '';

    public function __construct(InputStream $source)
    {
        $this->source = $source;
    }

    public function read(): Promise
    {
        return call(function () {
            $chunk = yield $this->source->read();
            if ($chunk === null) {
                if ($this->buffer === null) {
                    return null;
                }

                $chunk = \base64_encode($this->buffer);
                $this->buffer = null;

                return $chunk;
            }

            $this->buffer .= $chunk;

            $length = \strlen($this->buffer);
            $chunk = \base64_encode(\substr($this->buffer, 0, $length - $length % 3));
            $this->buffer = \substr($this->buffer, $length - $length % 3);

            return $chunk;
        });
    }
}

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