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<?php |
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/* |
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* This file is part of the webmozart/console package. |
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* |
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* (c) Bernhard Schussek <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Webmozart\Console\IO\InputStream; |
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use Webmozart\Assert\Assert; |
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use Webmozart\Console\Api\IO\InputStream; |
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use Webmozart\Console\Api\IO\IOException; |
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/** |
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* An input stream that reads from a PHP stream. |
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* |
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* @since 1.0 |
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* |
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* @author Bernhard Schussek <[email protected]> |
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*/ |
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class StreamInputStream implements InputStream |
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{ |
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/** |
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* @var resource |
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*/ |
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private $stream; |
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/** |
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* Creates the input. |
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* |
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* @param resource $stream A stream resource. |
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*/ |
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public function __construct($stream) |
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{ |
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Assert::resource($stream, 'stream'); |
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$this->stream = $stream; |
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// Not all streams are seekable |
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@rewind($this->stream); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function read($length) |
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{ |
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if (null === $this->stream) { |
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throw new IOException('Cannot read from a closed input.'); |
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} |
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if (feof($this->stream)) { |
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return null; |
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} |
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$data = fread($this->stream, $length); |
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if (false === $data && !feof($this->stream)) { |
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throw new IOException('Could not read stream.'); |
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} |
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return $data ?: null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function readLine($length = null) |
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{ |
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if (null === $this->stream) { |
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throw new IOException('Cannot read from a closed input.'); |
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} |
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if (feof($this->stream)) { |
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return null; |
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} |
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if (null !== $length) { |
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$data = fgets($this->stream, $length); |
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} else { |
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$data = fgets($this->stream); |
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} |
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if (false === $data && !feof($this->stream)) { |
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throw new IOException('Could not read stream.'); |
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} |
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return $data ?: null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function close() |
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{ |
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if ($this->stream) { |
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@fclose($this->stream); |
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$this->stream = null; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isClosed() |
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{ |
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return null === $this->stream; |
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} |
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} |
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If you suppress an error, we recommend checking for the error condition explicitly: