67 lines
1.3 KiB
PHP
67 lines
1.3 KiB
PHP
<?php
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/**
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* @author Olexandr Zanichkovsky <olexandr.zanichkovsky@zophiatech.com>
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* @package General
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*/
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require_once dirname(__FILE__) . '/XmlImportReaderInterface.php';
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/**
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* Allows to either peek or read a character from a string buffer
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*/
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class XmlImportStringReader implements XmlImportReaderInterface
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{
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/**
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* String buffer
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*
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* @var string
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*/
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private $buffer;
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/**
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* Current index
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*
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* @var int
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*/
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private $index = -1;
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/**
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* Creates new instance
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*
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* @param string $input
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*/
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public function __construct($input)
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{
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if (is_string($input))
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$this->buffer = $input;
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else
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throw new InvalidArgumentException("String expected as argument.");
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}
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/**
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* Returns the next symbol from the buffer without changes to current index
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* or false if buffer ends
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*
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* @return string
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*/
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public function peek()
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{
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if ($this->index + 1 >= strlen($this->buffer))
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return false;
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else
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return $this->buffer[$this->index + 1];
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}
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/**
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* Returns the next symbol from the buffer or false if buffer is ended
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*
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* @return string
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*/
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public function read()
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{
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$result = $this->peek();
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if ($this->index < strlen($this->buffer))
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$this->index++;
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return $result;
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}
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} |