www.aleph1.co.uk Git - yaffs-website/blob - vendor/guzzlehttp/psr7/src/DroppingStream.php

   1 <?php
   2 namespace GuzzleHttp\Psr7;
   3
   4 use Psr\Http\Message\StreamInterface;
   5
   6 /**
   7  * Stream decorator that begins dropping data once the size of the underlying
   8  * stream becomes too full.
   9  */
  10 class DroppingStream implements StreamInterface
  11 {
  12     use StreamDecoratorTrait;
  13
  14     private $maxLength;
  15
  16     /**
  17      * @param StreamInterface $stream    Underlying stream to decorate.
  18      * @param int             $maxLength Maximum size before dropping data.
  19      */
  20     public function __construct(StreamInterface $stream, $maxLength)
  21     {
  22         $this->stream = $stream;
  23         $this->maxLength = $maxLength;
  24     }
  25
  26     public function write($string)
  27     {
  28         $diff = $this->maxLength - $this->stream->getSize();
  29
  30         // Begin returning 0 when the underlying stream is too large.
  31         if ($diff <= 0) {
  32             return 0;
  33         }
  34
  35         // Write the stream or a subset of the stream if needed.
  36         if (strlen($string) < $diff) {
  37             return $this->stream->write($string);
  38         }
  39
  40         return $this->stream->write(substr($string, 0, $diff));
  41     }
  42 }