/** * Classes, which help reading streams of data from files. * Based on the classes from Danilo Segan * * @version $Id: streams.php 718 2012-10-31 00:32:02Z nbachiyski $ * @package pomo * @subpackage streams */ if ( !class_exists( 'POMO_Reader' ) ): class POMO_Reader { var $endian = 'little'; var $_post = ''; function POMO_Reader() { $this->is_overloaded = ((ini_get("mbstring.func_overload") & 2) != 0) && function_exists('mb_substr'); $this->_pos = 0; } /** * Sets the endianness of the file. * * @param $endian string 'big' or 'little' */ function setEndian($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 */ 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 */ 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 $this->_pos; } function is_resource() { return true; } function close() { return true; } } endif; if ( !class_exists( 'POMO_FileReader' ) ): class POMO_FileReader extends POMO_Reader { function POMO_FileReader($filename) { parent::POMO_Reader(); $this->_f = fopen($filename, 'rb'); } 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; } } endif; if ( !class_exists( 'POMO_StringReader' ) ): /** * Provides file-like methods for manipulating a string instead * of a physical file. */ class POMO_StringReader extends POMO_Reader { var $_str = ''; function POMO_StringReader($str = '') { parent::POMO_Reader(); $this->_str = $str; $this->_pos = 0; } function read($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)); } } endif; if ( !class_exists( 'POMO_CachedFileReader' ) ): /** * Reads the contents of the file in the beginning. */ class POMO_CachedFileReader extends POMO_StringReader { function POMO_CachedFileReader($filename) { parent::POMO_StringReader(); $this->_str = file_get_contents($filename); if (false === $this->_str) return false; $this->_pos = 0; } } endif; if ( !class_exists( 'POMO_CachedIntFileReader' ) ): /** * Reads the contents of the file in the beginning. */ class POMO_CachedIntFileReader extends POMO_CachedFileReader { function POMO_CachedIntFileReader($filename) { parent::POMO_CachedFileReader($filename); } } endif;