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<?php |
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namespace RouterOS\Streams; |
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use InvalidArgumentException; |
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use RouterOS\Interfaces\StreamInterface; |
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use RouterOS\Exceptions\StreamException; |
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/** |
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* class StringStream |
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* |
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* Initialized with a string, the read method retreive it as done with fread, consuming the buffer. |
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* When all the string has been read, exception is thrown when try to read again. |
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* |
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* @package RouterOS\Streams |
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* @since 0.9 |
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*/ |
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class StringStream implements StreamInterface |
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{ |
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/** |
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* @var string $buffer Stores the string to use |
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*/ |
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protected $buffer; |
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/** |
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* StringStream constructor. |
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* |
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* @param string $string |
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*/ |
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public function __construct(string $string) |
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{ |
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$this->buffer = $string; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @throws \RouterOS\Exceptions\StreamException |
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*/ |
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public function read(int $length): string |
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{ |
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$remaining = strlen($this->buffer); |
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if ($length < 0) { |
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throw new InvalidArgumentException('Cannot read a negative count of bytes from a stream'); |
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} |
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if (0 === $remaining) { |
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throw new StreamException('End of stream'); |
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} |
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if ($length >= $remaining) { |
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// returns all |
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$result = $this->buffer; |
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// No more in the buffer |
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$this->buffer = ''; |
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} else { |
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// acquire $length characters from the buffer |
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$result = substr($this->buffer, 0, $length); |
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// remove $length characters from the buffer |
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$this->buffer = substr_replace($this->buffer, '', 0, $length); |
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} |
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return $result; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @throws \InvalidArgumentException on invalid length |
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*/ |
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public function write(string $string, int $length = null): int |
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{ |
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if (null === $length) { |
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$length = strlen($string); |
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} |
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if ($length < 0) { |
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throw new InvalidArgumentException('Cannot write a negative count of bytes'); |
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} |
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return min($length, strlen($string)); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function close(): void |
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{ |
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$this->buffer = ''; |
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} |
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} |
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EvilFreelancer /
routeros-api-php
