diff -r a4642baaf829 -r 4d4862461b8d web/wp-includes/pomo/po.php
--- a/web/wp-includes/pomo/po.php	Tue Feb 02 14:45:47 2010 +0000
+++ b/web/wp-includes/pomo/po.php	Tue Feb 02 15:44:16 2010 +0000
@@ -1,360 +1,363 @@
-<?php
-/**
- * Class for working with PO files
- *
- * @version $Id: po.php 123 2009-05-13 19:35:43Z nbachiyski $
- * @package pomo
- * @subpackage po
- */
-
-require_once dirname(__FILE__) . '/translations.php';
-
-define('PO_MAX_LINE_LEN', 79);
-
-ini_set('auto_detect_line_endings', 1);
-
-/**
- * Routines for working with PO files
- */
-class PO extends Gettext_Translations {
-	
-
-	/**
-	 * Exports headers to a PO entry
-	 *
-	 * @return string msgid/msgstr PO entry for this PO file headers, doesn't contain newline at the end
-	 */
-	function export_headers() {
-		$header_string = '';
-		foreach($this->headers as $header => $value) {
-			$header_string.= "$header: $value\n";
-		}
-		$poified = PO::poify($header_string);
-		return rtrim("msgid \"\"\nmsgstr $poified");
-	}
-
-	/**
-	 * Exports all entries to PO format
-	 *
-	 * @return string sequence of mgsgid/msgstr PO strings, doesn't containt newline at the end
-	 */
-	function export_entries() {
-		//TODO sorting
-		return implode("\n\n", array_map(array('PO', 'export_entry'), $this->entries));
-	}
-
-	/**
-	 * Exports the whole PO file as a string
-	 *
-	 * @param bool $include_headers whether to include the headers in the export
-	 * @return string ready for inclusion in PO file string for headers and all the enrtries
-	 */
-	function export($include_headers = true) {
-		$res = '';
-		if ($include_headers) {
-			$res .= $this->export_headers();
-			$res .= "\n\n";
-		}
-		$res .= $this->export_entries();
-		return $res;
-	}
-
-	/**
-	 * Same as {@link export}, but writes the result to a file
-	 *
-	 * @param string $filename where to write the PO string
-	 * @param bool $include_headers whether to include tje headers in the export
-	 * @return bool true on success, false on error
-	 */
-	function export_to_file($filename, $include_headers = true) {
-		$fh = fopen($filename, 'w');
-		if (false === $fh) return false;
-		$export = $this->export($include_headers);
-		$res = fwrite($fh, $export);
-		if (false === $res) return false;
-		return fclose($fh);
-	}
-
-	/**
-	 * Formats a string in PO-style
-	 *
-	 * @static
-	 * @param string $string the string to format
-	 * @return string the poified string
-	 */
-	function poify($string) {
-		$quote = '"';
-		$slash = '\\';
-		$newline = "\n";
-
-		$replaces = array(
-			"$slash" 	=> "$slash$slash",
-			"$quote"	=> "$slash$quote",
-			"\t" 		=> '\t',
-		);
-
-		$string = str_replace(array_keys($replaces), array_values($replaces), $string);
-
-		$po = $quote.implode("${slash}n$quote$newline$quote", explode($newline, $string)).$quote;
-		// add empty string on first line for readbility
-		if (false !== strpos($string, $newline) &&
-				(substr_count($string, $newline) > 1 || !($newline === substr($string, -strlen($newline))))) {
-			$po = "$quote$quote$newline$po";
-		}
-		// remove empty strings
-		$po = str_replace("$newline$quote$quote", '', $po);
-		return $po;
-	}
-	
-	/**
-	 * Gives back the original string from a PO-formatted string
-	 * 
-	 * @static
-	 * @param string $string PO-formatted string
-	 * @return string enascaped string
-	 */
-	function unpoify($string) {
-		$escapes = array('t' => "\t", 'n' => "\n", '\\' => '\\');
-		$lines = array_map('trim', explode("\n", $string));
-		$lines = array_map(array('PO', 'trim_quotes'), $lines);
-		$unpoified = '';
-		$previous_is_backslash = false;
-		foreach($lines as $line) {
-			preg_match_all('/./u', $line, $chars);
-			$chars = $chars[0];
-			foreach($chars as $char) {
-				if (!$previous_is_backslash) {
-					if ('\\' == $char)
-						$previous_is_backslash = true;
-					else
-						$unpoified .= $char;
-				} else {
-					$previous_is_backslash = false;
-					$unpoified .= isset($escapes[$char])? $escapes[$char] : $char;
-				}
-			}
-		}
-		return $unpoified;
-	}
-
-	/**
-	 * Inserts $with in the beginning of every new line of $string and 
-	 * returns the modified string
-	 *
-	 * @static
-	 * @param string $string prepend lines in this string
-	 * @param string $with prepend lines with this string
-	 */
-	function prepend_each_line($string, $with) {
-		$php_with = var_export($with, true);
-		$lines = explode("\n", $string);
-		// do not prepend the string on the last empty line, artefact by explode
-		if ("\n" == substr($string, -1)) unset($lines[count($lines) - 1]);
-		$res = implode("\n", array_map(create_function('$x', "return $php_with.\$x;"), $lines));
-		// give back the empty line, we ignored above
-		if ("\n" == substr($string, -1)) $res .= "\n";
-		return $res;
-	}
-
-	/**
-	 * Prepare a text as a comment -- wraps the lines and prepends #
-	 * and a special character to each line
-	 *
-	 * @access private
-	 * @param string $text the comment text
-	 * @param string $char character to denote a special PO comment,
-	 * 	like :, default is a space
-	 */
-	function comment_block($text, $char=' ') {
-		$text = wordwrap($text, PO_MAX_LINE_LEN - 3);
-		return PO::prepend_each_line($text, "#$char ");
-	}
-
-	/**
-	 * Builds a string from the entry for inclusion in PO file
-	 *
-	 * @static
-	 * @param object &$entry the entry to convert to po string
-	 * @return string|bool PO-style formatted string for the entry or
-	 * 	false if the entry is empty
-	 */
-	function export_entry(&$entry) {
-		if (is_null($entry->singular)) return false;
-		$po = array();
-		if (!empty($entry->translator_comments)) $po[] = PO::comment_block($entry->translator_comments);
-		if (!empty($entry->extracted_comments)) $po[] = PO::comment_block($entry->extracted_comments, '.');
-		if (!empty($entry->references)) $po[] = PO::comment_block(implode(' ', $entry->references), ':');
-		if (!empty($entry->flags)) $po[] = PO::comment_block(implode(", ", $entry->flags), ',');
-		if (!is_null($entry->context)) $po[] = 'msgctxt '.PO::poify($entry->context);
-		$po[] = 'msgid '.PO::poify($entry->singular);
-		if (!$entry->is_plural) {
-			$translation = empty($entry->translations)? '' : $entry->translations[0];
-			$po[] = 'msgstr '.PO::poify($translation);
-		} else {
-			$po[] = 'msgid_plural '.PO::poify($entry->plural);
-			$translations = empty($entry->translations)? array('', '') : $entry->translations;
-			foreach($translations as $i => $translation) {
-				$po[] = "msgstr[$i] ".PO::poify($translation);
-			}
-		}
-		return implode("\n", $po);
-	}
-
-	function import_from_file($filename) {
-		$f = fopen($filename, 'r');
-		if (!$f) return false;
-		$lineno = 0;
-		while (true) {
-			$res = $this->read_entry($f, $lineno);
-			if (!$res) break;
-			if ($res['entry']->singular == '') {
-				$this->set_headers($this->make_headers($res['entry']->translations[0]));
-			} else {
-				$this->add_entry($res['entry']);
-			}
-		}
-		PO::read_line($f, 'clear');
-		return $res !== false;
-	}
-	
-	function read_entry($f, $lineno = 0) {
-		$entry = new Translation_Entry();
-		// where were we in the last step
-		// can be: comment, msgctxt, msgid, msgid_plural, msgstr, msgstr_plural
-		$context = '';
-		$msgstr_index = 0;
-		$is_final = create_function('$context', 'return $context == "msgstr" || $context == "msgstr_plural";');
-		while (true) {
-			$lineno++;
-			$line = PO::read_line($f);
-			if (!$line)  {
-				if (feof($f)) {
-					if ($is_final($context))
-						break;
-					elseif (!$context) // we haven't read a line and eof came
-						return null;
-					else
-						return false;
-				} else {
-					return false;
-				}
-			}
-			if ($line == "\n") continue;
-			$line = trim($line);
-			if (preg_match('/^#/', $line, $m)) {
-				// the comment is the start of a new entry
-				if ($is_final($context)) {
-					PO::read_line($f, 'put-back');
-					$lineno--;
-					break;
-				}
-				// comments have to be at the beginning
-				if ($context && $context != 'comment') {
-					return false;
-				}
-				// add comment
-				$this->add_comment_to_entry($entry, $line);;
-			} elseif (preg_match('/^msgctxt\s+(".*")/', $line, $m)) {
-				if ($is_final($context)) {
-					PO::read_line($f, 'put-back');
-					$lineno--;
-					break;
-				}
-				if ($context && $context != 'comment') {
-					return false;
-				}
-				$context = 'msgctxt';
-				$entry->context .= PO::unpoify($m[1]);
-			} elseif (preg_match('/^msgid\s+(".*")/', $line, $m)) {
-				if ($is_final($context)) {
-					PO::read_line($f, 'put-back');
-					$lineno--;
-					break;
-				}
-				if ($context && $context != 'msgctxt' && $context != 'comment') {
-					return false;
-				}
-				$context = 'msgid';
-				$entry->singular .= PO::unpoify($m[1]);
-			} elseif (preg_match('/^msgid_plural\s+(".*")/', $line, $m)) {
-				if ($context != 'msgid') {
-					return false;
-				}
-				$context = 'msgid_plural';
-				$entry->is_plural = true;
-				$entry->plural .= PO::unpoify($m[1]);
-			} elseif (preg_match('/^msgstr\s+(".*")/', $line, $m)) {
-				if ($context != 'msgid') {
-					return false;
-				}
-				$context = 'msgstr';
-				$entry->translations = array(PO::unpoify($m[1]));
-			} elseif (preg_match('/^msgstr\[(\d+)\]\s+(".*")/', $line, $m)) {
-				if ($context != 'msgid_plural' && $context != 'msgstr_plural') {
-					return false;
-				}
-				$context = 'msgstr_plural';
-				$msgstr_index = $m[1];
-				$entry->translations[$m[1]] = PO::unpoify($m[2]);
-			} elseif (preg_match('/^".*"$/', $line)) {
-				$unpoified = PO::unpoify($line);
-				switch ($context) {
-					case 'msgid':
-						$entry->singular .= $unpoified; break;
-					case 'msgctxt':
-						$entry->context .= $unpoified; break;
-					case 'msgid_plural':
-						$entry->plural .= $unpoified; break;
-					case 'msgstr':
-						$entry->translations[0] .= $unpoified; break;
-					case 'msgstr_plural':
-						$entry->translations[$msgstr_index] .= $unpoified; break;
-					default:
-						return false;
-				}
-			} else {
-				return false;
-			}
-		}
-		if (array() == array_filter($entry->translations)) $entry->translations = array();
-		return array('entry' => $entry, 'lineno' => $lineno);
-	}
-	
-	function read_line($f, $action = 'read') {
-		static $last_line = '';
-		static $use_last_line = false;
-		if ('clear' == $action) {
-			$last_line = '';
-			return true;
-		}
-		if ('put-back' == $action) {
-			$use_last_line = true;
-			return true;
-		}
-		$line = $use_last_line? $last_line : fgets($f);
-		$last_line = $line;
-		$use_last_line = false;
-		return $line;
-	}
-	
-	function add_comment_to_entry(&$entry, $po_comment_line) {
-		$first_two = substr($po_comment_line, 0, 2);
-		$comment = trim(substr($po_comment_line, 2));
-		if ('#:' == $first_two) {
-			$entry->references = array_merge($entry->references, preg_split('/\s+/', $comment));
-		} elseif ('#.' == $first_two) {
-			$entry->extracted_comments = trim($entry->extracted_comments . "\n" . $comment);
-		} elseif ('#,' == $first_two) {
-			$entry->flags = array_merge($entry->flags, preg_split('/,\s*/', $comment));
-		} else {
-			$entry->translator_comments = trim($entry->translator_comments . "\n" . $comment);
-		}
-	}
-	
-	function trim_quotes($s) {
-		if ( substr($s, 0, 1) == '"') $s = substr($s, 1);
-		if ( substr($s, -1, 1) == '"') $s = substr($s, 0, -1);
-		return $s;
-	}
-}
-?>
+<?php
+/**
+ * Class for working with PO files
+ *
+ * @version $Id: po.php 283 2009-09-23 16:21:51Z nbachiyski $
+ * @package pomo
+ * @subpackage po
+ */
+
+require_once dirname(__FILE__) . '/translations.php';
+
+define('PO_MAX_LINE_LEN', 79);
+
+ini_set('auto_detect_line_endings', 1);
+
+/**
+ * Routines for working with PO files
+ */
+if ( !class_exists( 'PO' ) ):
+class PO extends Gettext_Translations {
+	
+
+	/**
+	 * Exports headers to a PO entry
+	 *
+	 * @return string msgid/msgstr PO entry for this PO file headers, doesn't contain newline at the end
+	 */
+	function export_headers() {
+		$header_string = '';
+		foreach($this->headers as $header => $value) {
+			$header_string.= "$header: $value\n";
+		}
+		$poified = PO::poify($header_string);
+		return rtrim("msgid \"\"\nmsgstr $poified");
+	}
+
+	/**
+	 * Exports all entries to PO format
+	 *
+	 * @return string sequence of mgsgid/msgstr PO strings, doesn't containt newline at the end
+	 */
+	function export_entries() {
+		//TODO sorting
+		return implode("\n\n", array_map(array('PO', 'export_entry'), $this->entries));
+	}
+
+	/**
+	 * Exports the whole PO file as a string
+	 *
+	 * @param bool $include_headers whether to include the headers in the export
+	 * @return string ready for inclusion in PO file string for headers and all the enrtries
+	 */
+	function export($include_headers = true) {
+		$res = '';
+		if ($include_headers) {
+			$res .= $this->export_headers();
+			$res .= "\n\n";
+		}
+		$res .= $this->export_entries();
+		return $res;
+	}
+
+	/**
+	 * Same as {@link export}, but writes the result to a file
+	 *
+	 * @param string $filename where to write the PO string
+	 * @param bool $include_headers whether to include tje headers in the export
+	 * @return bool true on success, false on error
+	 */
+	function export_to_file($filename, $include_headers = true) {
+		$fh = fopen($filename, 'w');
+		if (false === $fh) return false;
+		$export = $this->export($include_headers);
+		$res = fwrite($fh, $export);
+		if (false === $res) return false;
+		return fclose($fh);
+	}
+
+	/**
+	 * Formats a string in PO-style
+	 *
+	 * @static
+	 * @param string $string the string to format
+	 * @return string the poified string
+	 */
+	function poify($string) {
+		$quote = '"';
+		$slash = '\\';
+		$newline = "\n";
+
+		$replaces = array(
+			"$slash" 	=> "$slash$slash",
+			"$quote"	=> "$slash$quote",
+			"\t" 		=> '\t',
+		);
+
+		$string = str_replace(array_keys($replaces), array_values($replaces), $string);
+
+		$po = $quote.implode("${slash}n$quote$newline$quote", explode($newline, $string)).$quote;
+		// add empty string on first line for readbility
+		if (false !== strpos($string, $newline) &&
+				(substr_count($string, $newline) > 1 || !($newline === substr($string, -strlen($newline))))) {
+			$po = "$quote$quote$newline$po";
+		}
+		// remove empty strings
+		$po = str_replace("$newline$quote$quote", '', $po);
+		return $po;
+	}
+	
+	/**
+	 * Gives back the original string from a PO-formatted string
+	 * 
+	 * @static
+	 * @param string $string PO-formatted string
+	 * @return string enascaped string
+	 */
+	function unpoify($string) {
+		$escapes = array('t' => "\t", 'n' => "\n", '\\' => '\\');
+		$lines = array_map('trim', explode("\n", $string));
+		$lines = array_map(array('PO', 'trim_quotes'), $lines);
+		$unpoified = '';
+		$previous_is_backslash = false;
+		foreach($lines as $line) {
+			preg_match_all('/./u', $line, $chars);
+			$chars = $chars[0];
+			foreach($chars as $char) {
+				if (!$previous_is_backslash) {
+					if ('\\' == $char)
+						$previous_is_backslash = true;
+					else
+						$unpoified .= $char;
+				} else {
+					$previous_is_backslash = false;
+					$unpoified .= isset($escapes[$char])? $escapes[$char] : $char;
+				}
+			}
+		}
+		return $unpoified;
+	}
+
+	/**
+	 * Inserts $with in the beginning of every new line of $string and 
+	 * returns the modified string
+	 *
+	 * @static
+	 * @param string $string prepend lines in this string
+	 * @param string $with prepend lines with this string
+	 */
+	function prepend_each_line($string, $with) {
+		$php_with = var_export($with, true);
+		$lines = explode("\n", $string);
+		// do not prepend the string on the last empty line, artefact by explode
+		if ("\n" == substr($string, -1)) unset($lines[count($lines) - 1]);
+		$res = implode("\n", array_map(create_function('$x', "return $php_with.\$x;"), $lines));
+		// give back the empty line, we ignored above
+		if ("\n" == substr($string, -1)) $res .= "\n";
+		return $res;
+	}
+
+	/**
+	 * Prepare a text as a comment -- wraps the lines and prepends #
+	 * and a special character to each line
+	 *
+	 * @access private
+	 * @param string $text the comment text
+	 * @param string $char character to denote a special PO comment,
+	 * 	like :, default is a space
+	 */
+	function comment_block($text, $char=' ') {
+		$text = wordwrap($text, PO_MAX_LINE_LEN - 3);
+		return PO::prepend_each_line($text, "#$char ");
+	}
+
+	/**
+	 * Builds a string from the entry for inclusion in PO file
+	 *
+	 * @static
+	 * @param object &$entry the entry to convert to po string
+	 * @return string|bool PO-style formatted string for the entry or
+	 * 	false if the entry is empty
+	 */
+	function export_entry(&$entry) {
+		if (is_null($entry->singular)) return false;
+		$po = array();
+		if (!empty($entry->translator_comments)) $po[] = PO::comment_block($entry->translator_comments);
+		if (!empty($entry->extracted_comments)) $po[] = PO::comment_block($entry->extracted_comments, '.');
+		if (!empty($entry->references)) $po[] = PO::comment_block(implode(' ', $entry->references), ':');
+		if (!empty($entry->flags)) $po[] = PO::comment_block(implode(", ", $entry->flags), ',');
+		if (!is_null($entry->context)) $po[] = 'msgctxt '.PO::poify($entry->context);
+		$po[] = 'msgid '.PO::poify($entry->singular);
+		if (!$entry->is_plural) {
+			$translation = empty($entry->translations)? '' : $entry->translations[0];
+			$po[] = 'msgstr '.PO::poify($translation);
+		} else {
+			$po[] = 'msgid_plural '.PO::poify($entry->plural);
+			$translations = empty($entry->translations)? array('', '') : $entry->translations;
+			foreach($translations as $i => $translation) {
+				$po[] = "msgstr[$i] ".PO::poify($translation);
+			}
+		}
+		return implode("\n", $po);
+	}
+
+	function import_from_file($filename) {
+		$f = fopen($filename, 'r');
+		if (!$f) return false;
+		$lineno = 0;
+		while (true) {
+			$res = $this->read_entry($f, $lineno);
+			if (!$res) break;
+			if ($res['entry']->singular == '') {
+				$this->set_headers($this->make_headers($res['entry']->translations[0]));
+			} else {
+				$this->add_entry($res['entry']);
+			}
+		}
+		PO::read_line($f, 'clear');
+		return $res !== false;
+	}
+	
+	function read_entry($f, $lineno = 0) {
+		$entry = new Translation_Entry();
+		// where were we in the last step
+		// can be: comment, msgctxt, msgid, msgid_plural, msgstr, msgstr_plural
+		$context = '';
+		$msgstr_index = 0;
+		$is_final = create_function('$context', 'return $context == "msgstr" || $context == "msgstr_plural";');
+		while (true) {
+			$lineno++;
+			$line = PO::read_line($f);
+			if (!$line)  {
+				if (feof($f)) {
+					if ($is_final($context))
+						break;
+					elseif (!$context) // we haven't read a line and eof came
+						return null;
+					else
+						return false;
+				} else {
+					return false;
+				}
+			}
+			if ($line == "\n") continue;
+			$line = trim($line);
+			if (preg_match('/^#/', $line, $m)) {
+				// the comment is the start of a new entry
+				if ($is_final($context)) {
+					PO::read_line($f, 'put-back');
+					$lineno--;
+					break;
+				}
+				// comments have to be at the beginning
+				if ($context && $context != 'comment') {
+					return false;
+				}
+				// add comment
+				$this->add_comment_to_entry($entry, $line);;
+			} elseif (preg_match('/^msgctxt\s+(".*")/', $line, $m)) {
+				if ($is_final($context)) {
+					PO::read_line($f, 'put-back');
+					$lineno--;
+					break;
+				}
+				if ($context && $context != 'comment') {
+					return false;
+				}
+				$context = 'msgctxt';
+				$entry->context .= PO::unpoify($m[1]);
+			} elseif (preg_match('/^msgid\s+(".*")/', $line, $m)) {
+				if ($is_final($context)) {
+					PO::read_line($f, 'put-back');
+					$lineno--;
+					break;
+				}
+				if ($context && $context != 'msgctxt' && $context != 'comment') {
+					return false;
+				}
+				$context = 'msgid';
+				$entry->singular .= PO::unpoify($m[1]);
+			} elseif (preg_match('/^msgid_plural\s+(".*")/', $line, $m)) {
+				if ($context != 'msgid') {
+					return false;
+				}
+				$context = 'msgid_plural';
+				$entry->is_plural = true;
+				$entry->plural .= PO::unpoify($m[1]);
+			} elseif (preg_match('/^msgstr\s+(".*")/', $line, $m)) {
+				if ($context != 'msgid') {
+					return false;
+				}
+				$context = 'msgstr';
+				$entry->translations = array(PO::unpoify($m[1]));
+			} elseif (preg_match('/^msgstr\[(\d+)\]\s+(".*")/', $line, $m)) {
+				if ($context != 'msgid_plural' && $context != 'msgstr_plural') {
+					return false;
+				}
+				$context = 'msgstr_plural';
+				$msgstr_index = $m[1];
+				$entry->translations[$m[1]] = PO::unpoify($m[2]);
+			} elseif (preg_match('/^".*"$/', $line)) {
+				$unpoified = PO::unpoify($line);
+				switch ($context) {
+					case 'msgid':
+						$entry->singular .= $unpoified; break;
+					case 'msgctxt':
+						$entry->context .= $unpoified; break;
+					case 'msgid_plural':
+						$entry->plural .= $unpoified; break;
+					case 'msgstr':
+						$entry->translations[0] .= $unpoified; break;
+					case 'msgstr_plural':
+						$entry->translations[$msgstr_index] .= $unpoified; break;
+					default:
+						return false;
+				}
+			} else {
+				return false;
+			}
+		}
+		if (array() == array_filter($entry->translations, create_function('$t', 'return $t || "0" === $t;'))) {
+			$entry->translations = array();
+		}
+		return array('entry' => $entry, 'lineno' => $lineno);
+	}
+	
+	function read_line($f, $action = 'read') {
+		static $last_line = '';
+		static $use_last_line = false;
+		if ('clear' == $action) {
+			$last_line = '';
+			return true;
+		}
+		if ('put-back' == $action) {
+			$use_last_line = true;
+			return true;
+		}
+		$line = $use_last_line? $last_line : fgets($f);
+		$last_line = $line;
+		$use_last_line = false;
+		return $line;
+	}
+	
+	function add_comment_to_entry(&$entry, $po_comment_line) {
+		$first_two = substr($po_comment_line, 0, 2);
+		$comment = trim(substr($po_comment_line, 2));
+		if ('#:' == $first_two) {
+			$entry->references = array_merge($entry->references, preg_split('/\s+/', $comment));
+		} elseif ('#.' == $first_two) {
+			$entry->extracted_comments = trim($entry->extracted_comments . "\n" . $comment);
+		} elseif ('#,' == $first_two) {
+			$entry->flags = array_merge($entry->flags, preg_split('/,\s*/', $comment));
+		} else {
+			$entry->translator_comments = trim($entry->translator_comments . "\n" . $comment);
+		}
+	}
+	
+	function trim_quotes($s) {
+		if ( substr($s, 0, 1) == '"') $s = substr($s, 1);
+		if ( substr($s, -1, 1) == '"') $s = substr($s, 0, -1);
+		return $s;
+	}
+}
+endif;
\ No newline at end of file