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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) 2018-2020 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 CBOR; |
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|
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use InvalidArgumentException; |
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use RuntimeException; |
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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 $resource; |
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|
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public function __construct(string $data) |
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{ |
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$resource = fopen('php://memory', 'rb+'); |
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if (false === $resource) { |
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throw new RuntimeException('Unable to open the memory'); |
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} |
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$result = fwrite($resource, $data); |
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if (false === $result) { |
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throw new RuntimeException('Unable to write the memory'); |
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} |
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$result = rewind($resource); |
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if (false === $result) { |
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throw new RuntimeException('Unable to rewind the memory'); |
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} |
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$this->resource = $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 === $length) { |
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return ''; |
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} |
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$data = fread($this->resource, $length); |
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if (false === $data) { |
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throw new RuntimeException('Unable to read the memory'); |
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} |
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if (mb_strlen($data, '8bit') !== $length) { |
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throw new InvalidArgumentException(sprintf('Out of range. Expected: %d, read: %d.', $length, mb_strlen($data, '8bit'))); |
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} |
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|
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return $data; |
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} |
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} |
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|
