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<?php

if (!class_exists('POMO_Reader', false)) {
    class POMO_Reader
    {
        public $endian = 'little';
        public $_post = '';
        function __construct()
        {
            $this->is_overloaded = (ini_get('mbstring.func_overload') & 2) != 0 && function_exists('mb_substr');
            $this->_pos = 0;
        }
        public function POMO_Reader()
        {
            _deprecated_constructor(self::class, '5.4.0', static::class);
            self::__construct();
        }
        function setEndian($endian)
        {
            $this->endian = $endian;
        }
        function readint32()
        {
            $bytes = $this->read(4);
            if (4 != $this->strlen($bytes)) {
                return false;
            }
            $endian_letter = 'big' === $this->endian ? 'N' : 'V';
            $int = unpack($endian_letter, $bytes);
            return reset($int);
        }
        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, $bytes);
        }
        function substr($string, $start, $length)
        {
            if ($this->is_overloaded) {
                return mb_substr($string, $start, $length, 'ascii');
            } else {
                return substr($string, $start, $length);
            }
        }
        function strlen($string)
        {
            if ($this->is_overloaded) {
                return mb_strlen($string, 'ascii');
            } else {
                return strlen($string);
            }
        }
        function str_split($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);
            }
        }
        function pos()
        {
            return $this->_pos;
        }
        function is_resource()
        {
            return true;
        }
        function close()
        {
            return true;
        }
    }
}
if (!class_exists('POMO_FileReader', false)) {
    class POMO_FileReader extends POMO_Reader
    {
        function __construct($filename)
        {
            parent::__construct();
            $this->_f = fopen($filename, 'rb');
        }
        public function POMO_FileReader($filename)
        {
            _deprecated_constructor(self::class, '5.4.0', static::class);
            self::__construct($filename);
        }
        function read($bytes)
        {
            return fread($this->_f, $bytes);
        }
        function seekto($pos)
        {
            if (-1 == fseek($this->_f, $pos, SEEK_SET)) {
                return false;
            }
            $this->_pos = $pos;
            return true;
        }
        function is_resource()
        {
            return is_resource($this->_f);
        }
        function feof()
        {
            return feof($this->_f);
        }
        function close()
        {
            return fclose($this->_f);
        }
        function read_all()
        {
            $all = '';
            while (!$this->feof()) {
                $all .= $this->read(4096);
            }
            return $all;
        }
    }
}
if (!class_exists('POMO_StringReader', false)) {
    class POMO_StringReader extends POMO_Reader
    {
        public $_str = '';
        function __construct($str = '')
        {
            parent::__construct();
            $this->_str = $str;
            $this->_pos = 0;
        }
        public function POMO_StringReader($str = '')
        {
            _deprecated_constructor(self::class, '5.4.0', static::class);
            self::__construct($str);
        }
        function read($bytes)
        {
            $data = $this->substr($this->_str, $this->_pos, $bytes);
            $this->_pos += $bytes;
            if ($this->strlen($this->_str) < $this->_pos) {
                $this->_pos = $this->strlen($this->_str);
            }
            return $data;
        }
        function seekto($pos)
        {
            $this->_pos = $pos;
            if ($this->strlen($this->_str) < $this->_pos) {
                $this->_pos = $this->strlen($this->_str);
            }
            return $this->_pos;
        }
        function length()
        {
            return $this->strlen($this->_str);
        }
        function read_all()
        {
            return $this->substr($this->_str, $this->_pos, $this->strlen($this->_str));
        }
    }
}
if (!class_exists('POMO_CachedFileReader', false)) {
    class POMO_CachedFileReader extends POMO_StringReader
    {
        function __construct($filename)
        {
            parent::__construct();
            $this->_str = file_get_contents($filename);
            if (false === $this->_str) {
                return false;
            }
            $this->_pos = 0;
        }
        public function POMO_CachedFileReader($filename)
        {
            _deprecated_constructor(self::class, '5.4.0', static::class);
            self::__construct($filename);
        }
    }
}
if (!class_exists('POMO_CachedIntFileReader', false)) {
    class POMO_CachedIntFileReader extends POMO_CachedFileReader
    {
        public function __construct($filename)
        {
            parent::__construct($filename);
        }
        function POMO_CachedIntFileReader($filename)
        {
            _deprecated_constructor(self::class, '5.4.0', static::class);
            self::__construct($filename);
        }
    }
}