X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/11be8dc178e77d0b46189bbd8e33a216a9b90942..d3b1ea255664edd2deef17f900a655613d20820d:/wp-includes/pomo/streams.php

diff --git a/wp-includes/pomo/streams.php b/wp-includes/pomo/streams.php
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+<?php
+/**
+ * Classes, which help reading streams of data from files.
+ * Based on the classes from Danilo Segan <danilo@kvota.net>
+ *
+ * @version $Id: streams.php 33 2009-02-16 09:33:39Z nbachiyski $
+ * @package pomo
+ * @subpackage streams
+ */
+
+
+/**
+ * Provides file-like methods for manipulating a string instead
+ * of a physical file.
+ */
+class POMO_StringReader {
+  var $_pos;
+  var $_str;
+
+  function POMO_StringReader($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 pos() {
+    return $this->_pos;
+  }
+
+  function length() {
+    return strlen($this->_str);
+  }
+
+}
+
+/**
+ * Reads the contents of the file in the beginning.
+ */
+class POMO_CachedFileReader extends POMO_StringReader {
+	function POMO_CachedFileReader($filename) {
+		$this->_str = file_get_contents($filename);
+		if (false === $this->_str)
+			return false;
+		$this->pos = 0;
+	}
+}
+
+/**
+ * Allows reading integers from a file.
+ */
+class POMO_CachedIntFileReader extends POMO_CachedFileReader {
+
+	var $endian = 'little';
+
+	/**
+	 * Opens a file and caches it.
+	 *
+	 * @param $filename string name of the file to be opened
+	 * @param $endian string endianness of the words in the file, allowed
+	 * 	values are 'little' or 'big'. Default value is 'little'
+	 */
+	function POMO_CachedIntFileReader($filename, $endian = 'little') {
+		$this->endian = $endian;
+		parent::POMO_CachedFileReader($filename);
+	}
+
+	/**
+	 * 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 = $this->read(4);
+		if (4 != strlen($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 != strlen($bytes))
+			return false;
+		$endian_letter = ('big' == $this->endian)? 'N' : 'V';
+		return unpack($endian_letter.$count, $bytes);
+	}
+}
+
+?>