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-rw-r--r--include/php-gettext/streams.php167
1 files changed, 167 insertions, 0 deletions
diff --git a/include/php-gettext/streams.php b/include/php-gettext/streams.php
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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;
+ }
+ }
+};
+
+
+?>