diff options
Diffstat (limited to 'src/php-gettext/gettext.php')
| -rw-r--r-- | src/php-gettext/gettext.php | 179 |
1 files changed, 121 insertions, 58 deletions
diff --git a/src/php-gettext/gettext.php b/src/php-gettext/gettext.php index 978794c..a121f9c 100644 --- a/src/php-gettext/gettext.php +++ b/src/php-gettext/gettext.php @@ -1,8 +1,8 @@ <?php /* - Copyright (c) 2003 Danilo Segan <danilo@kvota.net>. + 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 @@ -20,13 +20,13 @@ 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 @@ -36,7 +36,7 @@ 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 $STREAM = NULL; @@ -52,27 +52,33 @@ class gettext_reader { /* Methods */ - - + + /** * Reads a 32bit Integer from the Stream - * + * * @access private * @return Integer from the Stream */ function readint() { if ($this->BYTEORDER == 0) { // low endian - return array_shift(unpack('V', $this->STREAM->read(4))); + $input=unpack('V', $this->STREAM->read(4)); + return array_shift($input); } else { // big endian - return array_shift(unpack('N', $this->STREAM->read(4))); + $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 */ @@ -85,10 +91,10 @@ class gettext_reader { 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) */ @@ -98,39 +104,37 @@ class gettext_reader { $this->short_circuit = true; return; } - + // Caching can be turned off $this->enable_cache = $enable_cache; - // $MAGIC1 = (int)0x950412de; //bug in PHP 5 - $MAGIC1 = (int) - 1794895138; - // $MAGIC2 = (int)0xde120495; //bug - $MAGIC2 = (int) - 569244523; + $MAGIC1 = "\x95\x04\x12\xde"; + $MAGIC2 = "\xde\x12\x04\x95"; $this->STREAM = $Reader; - $magic = $this->readint(); - if ($magic == $MAGIC1 || $magic == ($MAGIC1 & 0xFFFFFFFF)) { - $this->BYTEORDER = 0; - } elseif ($magic == $MAGIC2 || $magic == ($MAGIC2 & 0xFFFFFFFF)) { + $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 = $this->readint(); } - + /** * Loads the translation tables from the MO file into the cache * If caching is enabled, also loads all strings into a cache * to speed up translation lookups - * + * * @access private */ function load_tables() { @@ -138,13 +142,17 @@ class gettext_reader { is_array($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 (!is_array($this->table_originals)) { + $this->STREAM->seekto($this->originals); + $this->table_originals = $this->readintarray($this->total * 2); + } + if (!is_array($this->table_translations)) { + $this->STREAM->seekto($this->translations); + $this->table_translations = $this->readintarray($this->total * 2); + } + if ($this->enable_cache) { $this->cache_translations = array (); /* read all strings in the cache */ @@ -157,10 +165,10 @@ class gettext_reader { } } } - + /** * Returns a string from the "originals" table - * + * * @access private * @param int num Offset number of original string * @return string Requested string if found, otherwise '' @@ -174,10 +182,10 @@ class gettext_reader { $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 '' @@ -191,10 +199,10 @@ class gettext_reader { $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) @@ -232,10 +240,10 @@ class gettext_reader { return $this->find_string($string, $half, $end); } } - + /** * Translates a string - * + * * @access public * @param string string to be translated * @return string translated string (or original, if not found) @@ -243,8 +251,8 @@ class gettext_reader { function translate($string) { if ($this->short_circuit) return $string; - $this->load_tables(); - + $this->load_tables(); + if ($this->enable_cache) { // Caching enabled, get translated string from cache if (array_key_exists($string, $this->cache_translations)) @@ -262,16 +270,65 @@ class gettext_reader { } /** + * Sanitize plural form expression for use in PHP eval call. + * + * @access private + * @return string sanitized plural form expression + */ + function sanitize_plural_expression($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 + // 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) { @@ -279,18 +336,15 @@ class gettext_reader { } else { $header = $this->get_translation_string(0); } - if (eregi("plural-forms: ([^\n]*)\n", $header, $regs)) - $expr = $regs[1]; - else - $expr = "nplurals=2; plural=n == 1 ? 0 : 1;"; - $this->pluralheader = $expr; + $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 @@ -300,7 +354,7 @@ class gettext_reader { $string = str_replace('nplurals',"\$total",$string); $string = str_replace("n",$n,$string); $string = str_replace('plural',"\$plural",$string); - + $total = 0; $plural = 0; @@ -311,7 +365,7 @@ class gettext_reader { /** * Plural version of gettext - * + * * @access public * @param string single * @param string plural @@ -327,12 +381,12 @@ class gettext_reader { } // find out the appropriate form - $select = $this->select_string($number); - + $select = $this->select_string($number); + // this should contains all strings separated by NULLs - $key = $single.chr(0).$plural; - - + $key = $single . chr(0) . $plural; + + if ($this->enable_cache) { if (! array_key_exists($key, $this->cache_translations)) { return ($number != 1) ? $plural : $single; @@ -353,6 +407,15 @@ class gettext_reader { } } + function pgettext($context, $msgid) { + $key = $context . chr(4) . $msgid; + return $this->translate($key); + } + + function npgettext($context, $singular, $plural, $number) { + $singular = $context . chr(4) . $singular; + return $this->ngettext($singular, $plural, $number); + } } ?> |