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<?php |
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|
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declare(strict_types=1); |
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|
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2021 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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|
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namespace Webauthn; |
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|
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use Assert\Assertion; |
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use CBOR\Stream; |
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use function Safe\fclose; |
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use function Safe\fopen; |
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use function Safe\fread; |
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use function Safe\fwrite; |
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use function Safe\rewind; |
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use function Safe\sprintf; |
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|
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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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/** |
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* @var int |
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*/ |
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private $length; |
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|
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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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|
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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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fwrite($resource, $data); |
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rewind($resource); |
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$this->data = $resource; |
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} |
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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, $length); |
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$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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|
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return $read; |
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} |
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|
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public function close(): void |
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{ |
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fclose($this->data); |
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} |
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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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|
