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<?php
/*
* This file is part of the webmozart/console package.
*
* (c) Bernhard Schussek <bschussek@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Webmozart\Console\IO\InputStream;
/**
* An input stream that reads from a string.
*
* @since 1.0
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class StringInputStream extends StreamInputStream
{
/**
* @var resource
*/
private $stream;
/**
* Creates the input stream.
*
* @param string $string The string to read from.
*/
public function __construct($string = '')
{
$this->stream = fopen('php://memory', 'rw');
parent::__construct($this->stream);
$this->set($string);
}
/**
* Clears the contents of the buffer.
*/
public function clear()
{
ftruncate($this->stream, 0);
rewind($this->stream);
}
/**
* Sets the string to read from.
*
* @param string $string The string to read from.
*/
public function set($string)
{
$this->clear();
fwrite($this->stream, $string);
rewind($this->stream);
}
/**
* Appends a string to the stream.
*
* @param string $string The string to append.
*/
public function append($string)
{
$pos = ftell($this->stream);
fseek($this->stream, 0, SEEK_END);
fwrite($this->stream, $string);
fseek($this->stream, $pos);
}
}