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<?php /* Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>. This file is part of PHP-gettext. PHP-gettext is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. PHP-gettext is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with PHP-gettext; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ // Simple class to wrap file streams, string streams, etc. // seek is essential, and it should be byte stream class StreamReader { // should return a string [FIXME: perhaps return array of bytes?] function read($bytes) { return false; } // should return new position function seekto($position) { return false; } // returns current position function currentpos() { return false; } // returns length of entire stream (limit for seekto()s) function length() { return false; } }; class StringReader { var $_pos; var $_str; function StringReader($str='') { $this->_str = $str; $this->_pos = 0; } function read($bytes) { $data = substr($this->_str, $this->_pos, $bytes); $this->_pos += $bytes; if (strlen($this->_str)<$this->_pos) $this->_pos = strlen($this->_str); return $data; } function seekto($pos) { $this->_pos = $pos; if (strlen($this->_str)<$this->_pos) $this->_pos = strlen($this->_str); return $this->_pos; } function currentpos() { return $this->_pos; } function length() { return strlen($this->_str); } }; class FileReader { var $_pos; var $_fd; var $_length; function FileReader($filename) { if (file_exists($filename)) { $this->_length=filesize($filename); $this->_pos = 0; $this->_fd = fopen($filename,'rb'); if (!$this->_fd) { $this->error = 3; // Cannot read file, probably permissions return false; } } else { $this->error = 2; // File doesn't exist return false; } } function read($bytes) { if ($bytes) { fseek($this->_fd, $this->_pos); // PHP 5.1.1 does not read more than 8192 bytes in one fread() // the discussions at PHP Bugs suggest it's the intended behaviour $data = ''; while ($bytes > 0) { $chunk = fread($this->_fd, $bytes); $data .= $chunk; $bytes -= strlen($chunk); } $this->_pos = ftell($this->_fd); return $data; } else return ''; } function seekto($pos) { fseek($this->_fd, $pos); $this->_pos = ftell($this->_fd); return $this->_pos; } function currentpos() { return $this->_pos; } function length() { return $this->_length; } function close() { fclose($this->_fd); } }; // Preloads entire file in memory first, then creates a StringReader // over it (it assumes knowledge of StringReader internals) class CachedFileReader extends StringReader { function CachedFileReader($filename) { if (file_exists($filename)) { $length=filesize($filename); $fd = fopen($filename,'rb'); if (!$fd) { $this->error = 3; // Cannot read file, probably permissions return false; } $this->_str = fread($fd, $length); fclose($fd); } else { $this->error = 2; // File doesn't exist return false; } } }; ?>