167 lines
3.7 KiB
PHP
167 lines
3.7 KiB
PHP
<?php
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/*
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Copyright (c) 2003, 2005 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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// Simple class to wrap file streams, string streams, etc.
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// seek is essential, and it should be byte stream
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class StreamReader {
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// should return a string [FIXME: perhaps return array of bytes?]
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function read($bytes) {
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return false;
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}
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// should return new position
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function seekto($position) {
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return false;
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}
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// returns current position
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function currentpos() {
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return false;
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}
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// returns length of entire stream (limit for seekto()s)
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function length() {
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return false;
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}
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}
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class StringReader {
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var $_pos;
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var $_str;
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function StringReader($str='') {
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$this->_str = $str;
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$this->_pos = 0;
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}
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function read($bytes) {
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$data = substr($this->_str, $this->_pos, $bytes);
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$this->_pos += $bytes;
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if (strlen($this->_str)<$this->_pos)
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$this->_pos = strlen($this->_str);
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return $data;
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}
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function seekto($pos) {
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$this->_pos = $pos;
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if (strlen($this->_str)<$this->_pos)
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$this->_pos = strlen($this->_str);
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return $this->_pos;
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}
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function currentpos() {
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return $this->_pos;
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}
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function length() {
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return strlen($this->_str);
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}
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}
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class FileReader {
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var $_pos;
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var $_fd;
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var $_length;
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function FileReader($filename) {
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if (file_exists($filename)) {
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$this->_length=filesize($filename);
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$this->_pos = 0;
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$this->_fd = fopen($filename,'rb');
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if (!$this->_fd) {
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$this->error = 3; // Cannot read file, probably permissions
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return false;
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}
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} else {
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$this->error = 2; // File doesn't exist
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return false;
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}
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}
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function read($bytes) {
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if ($bytes) {
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fseek($this->_fd, $this->_pos);
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// PHP 5.1.1 does not read more than 8192 bytes in one fread()
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// the discussions at PHP Bugs suggest it's the intended behaviour
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$data = '';
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while ($bytes > 0) {
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$chunk = fread($this->_fd, $bytes);
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$data .= $chunk;
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$bytes -= strlen($chunk);
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}
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$this->_pos = ftell($this->_fd);
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return $data;
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} else return '';
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}
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function seekto($pos) {
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fseek($this->_fd, $pos);
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$this->_pos = ftell($this->_fd);
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return $this->_pos;
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}
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function currentpos() {
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return $this->_pos;
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}
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function length() {
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return $this->_length;
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}
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function close() {
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fclose($this->_fd);
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}
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}
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// Preloads entire file in memory first, then creates a StringReader
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// over it (it assumes knowledge of StringReader internals)
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class CachedFileReader extends StringReader {
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function CachedFileReader($filename) {
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if (file_exists($filename)) {
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$length=filesize($filename);
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$fd = fopen($filename,'rb');
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if (!$fd) {
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$this->error = 3; // Cannot read file, probably permissions
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return false;
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}
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$this->_str = fread($fd, $length);
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fclose($fd);
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} else {
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$this->error = 2; // File doesn't exist
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return false;
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}
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}
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}
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?>
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