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Diffstat (limited to 'include/php-gettext/gettext.php')
| -rw-r--r-- | include/php-gettext/gettext.php | 408 |
1 files changed, 0 insertions, 408 deletions
diff --git a/include/php-gettext/gettext.php b/include/php-gettext/gettext.php deleted file mode 100644 index f11da2e27..000000000 --- a/include/php-gettext/gettext.php +++ /dev/null @@ -1,408 +0,0 @@ -<?php -/* - Copyright (c) 2003, 2009 Danilo Segan <danilo@kvota.net>. - Copyright (c) 2005 Nico Kaiser <nico@siriux.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 - -*/ - -/** - * Provides a simple gettext replacement that works independently from - * the system's gettext abilities. - * It can read MO files and use them for translating strings. - * The files are passed to gettext_reader as a Stream (see streams.php) - * - * This version has the ability to cache all strings and translations to - * speed up the string lookup. - * While the cache is enabled by default, it can be switched off with the - * second parameter in the constructor (e.g. whenusing very large MO files - * that you don't want to keep in memory) - */ -class gettext_reader { - //public: - var $error = 0; // public variable that holds error code (0 if no error) - - //private: - var $BYTEORDER = 0; // 0: low endian, 1: big endian - var $STREAM = NULL; - var $short_circuit = false; - var $enable_cache = false; - var $originals = NULL; // offset of original table - var $translations = NULL; // offset of translation table - var $pluralheader = NULL; // cache header field for plural forms - var $total = 0; // total string count - var $table_originals = NULL; // table for original strings (offsets) - var $table_translations = NULL; // table for translated strings (offsets) - var $cache_translations = NULL; // original -> translation mapping - - - /* Methods */ - - - /** - * Reads a 32bit Integer from the Stream - * - * @access private - * @return Integer from the Stream - */ - function readint() { - if ($this->BYTEORDER == 0) { - // low endian - $input=unpack('V', $this->STREAM->read(4)); - return array_shift($input); - } else { - // big endian - $input=unpack('N', $this->STREAM->read(4)); - return array_shift($input); - } - } - - function read($bytes) { - return $this->STREAM->read($bytes); - } - - /** - * Reads an array of Integers from the Stream - * - * @param int count How many elements should be read - * @return Array of Integers - */ - function readintarray($count) { - if ($this->BYTEORDER == 0) { - // low endian - return unpack('V'.$count, $this->STREAM->read(4 * $count)); - } else { - // big endian - return unpack('N'.$count, $this->STREAM->read(4 * $count)); - } - } - - /** - * Constructor - * - * @param object Reader the StreamReader object - * @param boolean enable_cache Enable or disable caching of strings (default on) - */ - function gettext_reader($Reader, $enable_cache = true) { - // If there isn't a StreamReader, turn on short circuit mode. - if (! $Reader || isset($Reader->error) ) { - $this->short_circuit = true; - return; - } - - // Caching can be turned off - $this->enable_cache = $enable_cache; - - $MAGIC1 = "\x95\x04\x12\xde"; - $MAGIC2 = "\xde\x12\x04\x95"; - - $this->STREAM = $Reader; - $magic = $this->read(4); - if ($magic == $MAGIC1) { - $this->BYTEORDER = 1; - } elseif ($magic == $MAGIC2) { - $this->BYTEORDER = 0; - } else { - $this->error = 1; // not MO file - return false; - } - - // FIXME: Do we care about revision? We should. - $revision = $this->readint(); - - $this->total = $this->readint(); - $this->originals = $this->readint(); - $this->translations = $this->readint(); - } - - /** - * Loads the translation tables from the MO file into the cache - * If caching is enabled, also loads all strings into a cache - * to speed up translation lookups - * - * @access private - */ - function load_tables() { - if (is_array($this->cache_translations) && - is_array($this->table_originals) && - is_array($this->table_translations)) - return; - - /* get original and translations tables */ - $this->STREAM->seekto($this->originals); - $this->table_originals = $this->readintarray($this->total * 2); - $this->STREAM->seekto($this->translations); - $this->table_translations = $this->readintarray($this->total * 2); - - if ($this->enable_cache) { - $this->cache_translations = array (); - /* read all strings in the cache */ - for ($i = 0; $i < $this->total; $i++) { - $this->STREAM->seekto($this->table_originals[$i * 2 + 2]); - $original = $this->STREAM->read($this->table_originals[$i * 2 + 1]); - $this->STREAM->seekto($this->table_translations[$i * 2 + 2]); - $translation = $this->STREAM->read($this->table_translations[$i * 2 + 1]); - $this->cache_translations[$original] = $translation; - } - } - } - - /** - * Returns a string from the "originals" table - * - * @access private - * @param int num Offset number of original string - * @return string Requested string if found, otherwise '' - */ - function get_original_string($num) { - $length = $this->table_originals[$num * 2 + 1]; - $offset = $this->table_originals[$num * 2 + 2]; - if (! $length) - return ''; - $this->STREAM->seekto($offset); - $data = $this->STREAM->read($length); - return (string)$data; - } - - /** - * Returns a string from the "translations" table - * - * @access private - * @param int num Offset number of original string - * @return string Requested string if found, otherwise '' - */ - function get_translation_string($num) { - $length = $this->table_translations[$num * 2 + 1]; - $offset = $this->table_translations[$num * 2 + 2]; - if (! $length) - return ''; - $this->STREAM->seekto($offset); - $data = $this->STREAM->read($length); - return (string)$data; - } - - /** - * Binary search for string - * - * @access private - * @param string string - * @param int start (internally used in recursive function) - * @param int end (internally used in recursive function) - * @return int string number (offset in originals table) - */ - function find_string($string, $start = -1, $end = -1) { - if (($start == -1) or ($end == -1)) { - // find_string is called with only one parameter, set start end end - $start = 0; - $end = $this->total; - } - if (abs($start - $end) <= 1) { - // We're done, now we either found the string, or it doesn't exist - $txt = $this->get_original_string($start); - if ($string == $txt) - return $start; - else - return -1; - } else if ($start > $end) { - // start > end -> turn around and start over - return $this->find_string($string, $end, $start); - } else { - // Divide table in two parts - $half = (int)(($start + $end) / 2); - $cmp = strcmp($string, $this->get_original_string($half)); - if ($cmp == 0) - // string is exactly in the middle => return it - return $half; - else if ($cmp < 0) - // The string is in the upper half - return $this->find_string($string, $start, $half); - else - // The string is in the lower half - return $this->find_string($string, $half, $end); - } - } - - /** - * Translates a string - * - * @access public - * @param string string to be translated - * @return string translated string (or original, if not found) - */ - function translate($string) { - if ($this->short_circuit) - return $string; - $this->load_tables(); - - if ($this->enable_cache) { - // Caching enabled, get translated string from cache - if (array_key_exists($string, $this->cache_translations)) - return $this->cache_translations[$string]; - else - return $string; - } else { - // Caching not enabled, try to find string - $num = $this->find_string($string); - if ($num == -1) - return $string; - else - return $this->get_translation_string($num); - } - } - - /** - * Sanitize plural form expression for use in PHP eval call. - * - * @access private - * @return string sanitized plural form expression - */ - function sanitize_plural_expression($expr) { - // Get rid of disallowed characters. - $expr = preg_replace('@[^a-zA-Z0-9_:;\(\)\?\|\&=!<>+*/\%-]@', '', $expr); - - // Add parenthesis for tertiary '?' operator. - $expr .= ';'; - $res = ''; - $p = 0; - for ($i = 0; $i < strlen($expr); $i++) { - $ch = $expr[$i]; - switch ($ch) { - case '?': - $res .= ' ? ('; - $p++; - break; - case ':': - $res .= ') : ('; - break; - case ';': - $res .= str_repeat( ')', $p) . ';'; - $p = 0; - break; - default: - $res .= $ch; - } - } - return $res; - } - - /** - * Parse full PO header and extract only plural forms line. - * - * @access private - * @return string verbatim plural form header field - */ - function extract_plural_forms_header_from_po_header($header) { - if (preg_match("/(^|\n)plural-forms: ([^\n]*)\n/i", $header, $regs)) - $expr = $regs[2]; - else - $expr = "nplurals=2; plural=n == 1 ? 0 : 1;"; - return $expr; - } - - /** - * Get possible plural forms from MO header - * - * @access private - * @return string plural form header - */ - function get_plural_forms() { - // lets assume message number 0 is header - // this is true, right? - $this->load_tables(); - - // cache header field for plural forms - if (! is_string($this->pluralheader)) { - if ($this->enable_cache) { - $header = $this->cache_translations[""]; - } else { - $header = $this->get_translation_string(0); - } - $expr = $this->extract_plural_forms_header_from_po_header($header); - $this->pluralheader = $this->sanitize_plural_expression($expr); - } - return $this->pluralheader; - } - - /** - * Detects which plural form to take - * - * @access private - * @param n count - * @return int array index of the right plural form - */ - function select_string($n) { - $string = $this->get_plural_forms(); - $string = str_replace('nplurals',"\$total",$string); - $string = str_replace("n",$n,$string); - $string = str_replace('plural',"\$plural",$string); - - $total = 0; - $plural = 0; - - eval("$string"); - if ($plural >= $total) $plural = $total - 1; - return $plural; - } - - /** - * Plural version of gettext - * - * @access public - * @param string single - * @param string plural - * @param string number - * @return translated plural form - */ - function ngettext($single, $plural, $number) { - if ($this->short_circuit) { - if ($number != 1) - return $plural; - else - return $single; - } - - // find out the appropriate form - $select = $this->select_string($number); - - // this should contains all strings separated by NULLs - $key = $single.chr(0).$plural; - - - if ($this->enable_cache) { - if (! array_key_exists($key, $this->cache_translations)) { - return ($number != 1) ? $plural : $single; - } else { - $result = $this->cache_translations[$key]; - $list = explode(chr(0), $result); - return $list[$select]; - } - } else { - $num = $this->find_string($key); - if ($num == -1) { - return ($number != 1) ? $plural : $single; - } else { - $result = $this->get_translation_string($num); - $list = explode(chr(0), $result); - return $list[$select]; - } - } - } - -} - -?> |