73 lines
1.6 KiB
PHP
73 lines
1.6 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014-2019 Spomky-Labs
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*
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* This software may be modified and distributed under the terms
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* of the MIT license. See the LICENSE file for details.
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*/
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namespace Webauthn;
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use Assert\Assertion;
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use CBOR\Stream;
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final class StringStream implements Stream
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{
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/**
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* @var resource
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*/
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private $data;
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/**
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* @var int
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*/
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private $length;
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/**
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* @var int
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*/
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private $totalRead = 0;
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public function __construct(string $data)
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{
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$this->length = mb_strlen($data, '8bit');
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$resource = fopen('php://memory', 'rb+');
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Assertion::isResource($resource, 'Unable to open memory');
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$result = fwrite($resource, $data);
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Assertion::integer($result, 'Unable to write memory');
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$result = rewind($resource);
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Assertion::true($result, 'Unable to read memory');
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$this->data = $resource;
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}
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public function read(int $length): string
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{
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if (0 === $length) {
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return '';
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}
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$read = fread($this->data, $length);
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Assertion::string($read, 'Unable to read memory');
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$bytesRead = mb_strlen($read, '8bit');
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Assertion::length($read, $length, sprintf('Out of range. Expected: %d, read: %d.', $length, $bytesRead), null, '8bit');
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$this->totalRead += $bytesRead;
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return $read;
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}
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public function close(): void
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{
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$result = fclose($this->data);
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Assertion::true($result, 'Unable to close the memory');
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}
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public function isEOF(): bool
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{
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return $this->totalRead === $this->length;
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}
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}
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