136 lines
2.9 KiB
PHP
136 lines
2.9 KiB
PHP
<?php
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/*
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Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>.
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This file is part of PHP-gettext.
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PHP-gettext is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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PHP-gettext is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with PHP-gettext; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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declare(strict_types=1);
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namespace CoreLibs\Language\Core;
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class FileReader
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{
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/** @var int */
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public int $fr_pos;
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/** @var resource|bool */
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public mixed $fr_fd; // no resource type yet
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/** @var int */
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public int $fr_length;
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/** @var int */
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public int $error = 0;
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/**
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* file read constructor
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*
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* @param string $filename file name to load
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*/
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public function __construct(string $filename)
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{
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if (file_exists($filename)) {
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$this->fr_length = filesize($filename) ?: 0;
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$this->fr_pos = 0;
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$this->fr_fd = fopen($filename, 'rb');
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if (!is_resource($this->fr_fd)) {
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$this->error = 3; // Cannot read file, probably permissions
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}
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} else {
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$this->error = 2; // File doesn't exist
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}
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}
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/**
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* read byte data length
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*
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* @param int $bytes how many bytes to read
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* @return string read data as string
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*/
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public function read(int $bytes): string
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{
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if (!$bytes || !is_resource($this->fr_fd)) {
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return '';
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}
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fseek($this->fr_fd, $this->fr_pos);
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// PHP 5.1.1 does not read more than 8192 bytes in one fread()
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// the discussions at PHP Bugs suggest it's the intended behaviour
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$data = '';
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while ($bytes > 0) {
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$chunk = fread($this->fr_fd, $bytes);
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if ($chunk === false) {
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break;
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}
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$data .= $chunk;
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$bytes -= strlen($chunk);
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}
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$this->fr_pos = ftell($this->fr_fd) ?: 0;
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return $data;
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}
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/**
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* seek to a position in the file
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*
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* @param int $pos position where to go to
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* @return int file position after seek done
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*/
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public function seekto(int $pos): int
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{
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if (!is_resource($this->fr_fd)) {
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return 0;
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}
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fseek($this->fr_fd, $pos);
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$this->fr_pos = ftell($this->fr_fd) ?: 0;
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return $this->fr_pos;
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}
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/**
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* get current position in file
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*
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* @return int current position in bytes
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*/
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public function currentpos(): int
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{
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return $this->fr_pos;
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}
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/**
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* file length/size
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*
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* @return int file size in bytes
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*/
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public function length(): int
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{
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return $this->fr_length;
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}
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/**
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* close open file handler
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*
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* @return void has no return
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*/
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public function close(): void
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{
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if (is_resource($this->fr_fd)) {
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fclose($this->fr_fd);
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}
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}
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}
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// __END__
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