<?php
defined('IN_ROYALCMS') or exit('No permission resources.');

class Component_Pomo_Reader
{

    protected $endian = 'little';

    protected $_post = '';

    public function __construct()
    {
        $this->is_overloaded = ((ini_get("mbstring.func_overload") & 2) != 0) && function_exists('mb_substr');
        $this->_pos = 0;
    }

    /**
     * Sets the endianness of the file.
     *
     * @param $endian string
     *            'big' or 'little'
     */
    public function setEndian($endian)
    {
        $this->endian = $endian;
    }

    /**
     * Reads a 32bit Integer from the Stream
     *
     * @return mixed The integer, corresponding to the next 32 bits from
     *         the stream of false if there are not enough bytes or on error
     */
    public function readint32()
    {
        $bytes = $this->read(4);
        if (4 != $this->strlen($bytes))
            return false;
        $endian_letter = ('big' == $this->endian) ? 'N' : 'V';
        $int = unpack($endian_letter, $bytes);
        return array_shift($int);
    }

    /**
     * Reads an array of 32-bit Integers from the Stream
     *
     * @param
     *            integer count How many elements should be read
     * @return mixed Array of integers or false if there isn't
     *         enough data or on error
     */
    public function readint32array($count)
    {
        $bytes = $this->read(4 * $count);
        if (4 * $count != $this->strlen($bytes))
            return false;
        $endian_letter = ('big' == $this->endian) ? 'N' : 'V';
        return unpack($endian_letter . $count, $bytes);
    }

    public function substr($string, $start, $length)
    {
        if ($this->is_overloaded) {
            return mb_substr($string, $start, $length, 'ascii');
        } else {
            return substr($string, $start, $length);
        }
    }

    public function strlen($string)
    {
        if ($this->is_overloaded) {
            return mb_strlen($string, 'ascii');
        } else {
            return strlen($string);
        }
    }

    public function str_split($string, $chunk_size)
    {
        if (! function_exists('str_split')) {
            $length = $this->strlen($string);
            $out = array();
            for ($i = 0; $i < $length; $i += $chunk_size)
                $out[] = $this->substr($string, $i, $chunk_size);
            return $out;
        } else {
            return str_split($string, $chunk_size);
        }
    }

    public function pos()
    {
        return $this->_pos;
    }

    public function is_resource()
    {
        return true;
    }

    public function close()
    {
        return true;
    }
}

// end