simpleid/www/lib/gettext/gettext.php - sourcearcade - Gitiles

 <?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 __construct($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 */
     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) {
       $this->cache_translations = array ();
       /* read all strings in the cache */
       for ($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];
       }
     }
   }

   function pgettext($context, $msgid) {
     $key = $context . chr(4) . $msgid;
     $ret = $this->translate($key);
     if (strpos($ret, "\004") !== FALSE) {
       return $msgid;
     } else {
       return $ret;
     }
   }

   function npgettext($context, $singular, $plural, $number) {
     $key = $context . chr(4) . $singular;
     $ret = $this->ngettext($key, $plural, $number);
     if (strpos($ret, "\004") !== FALSE) {
       return $singular;
     } else {
       return $ret;
     }

   }
 }

 ?>
	<?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 __construct($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 */
	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) {
	$this->cache_translations = array ();
	/* read all strings in the cache */
	for ($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];
	}
	}
	}

	function pgettext($context, $msgid) {
	$key = $context . chr(4) . $msgid;
	$ret = $this->translate($key);
	if (strpos($ret, "\004") !== FALSE) {
	return $msgid;
	} else {
	return $ret;
	}
	}

	function npgettext($context, $singular, $plural, $number) {
	$key = $context . chr(4) . $singular;
	$ret = $this->ngettext($key, $plural, $number);
	if (strpos($ret, "\004") !== FALSE) {
	return $singular;
	} else {
	return $ret;
	}

	}
	}

	?>