<?php
/**
 * Numbers_Words
 *
 * PHP version 4
 *
 * Copyright (c) 1997-2006 The PHP Group
 *
 * This source file is subject to version 3.0 of the PHP license,
 * that is bundled with this package in the file LICENSE, and is
 * available at through the world-wide-web at
 * http://www.php.net/license/3_0.txt.
 * If you did not receive a copy of the PHP license and are unable to
 * obtain it through the world-wide-web, please send a note to
 * license@php.net so we can mail you a copy immediately.
 *
 * @category Numbers
 * @package  Numbers_Words
 * @author   Piotr Klaban <makler@man.torun.pl>
 * @license  PHP 3.0 http://www.php.net/license/3_0.txt
 * @version  SVN: $Id: lang.de.php 302816 2010-08-26 16:02:29Z ifeghali $
 * @link     http://pear.php.net/package/Numbers_Words
 */

/**
 *
 * Class for translating numbers into German.
 * @author Piotr Klaban
 * @package Numbers_Words
 */

/**
 * Include needed files
 */
require_once "Numbers/Words.php";

/**
 * Class for translating numbers into German.
 *
 * @category Numbers
 * @package  Numbers_Words
 * @author   Piotr Klaban <makler@man.torun.pl>
 * @license  PHP 3.0 http://www.php.net/license/3_0.txt
 * @link     http://pear.php.net/package/Numbers_Words
 */
class Numbers_Words_de extends Numbers_Words
{

	// {{{ properties

	/**
	 * Locale name
	 * @var string
	 * @access public
	 */
	var $locale = 'de';

	/**
	 * Language name in English
	 * @var string
	 * @access public
	 */
	var $lang = 'German';

	/**
	 * Native language name
	 * @var string
	 * @access public
	 */
	var $lang_native = 'Deutsch';

	/**
	 * The word for the minus sign
	 * @var string
	 * @access private
	 */
	var $_minus = 'Minus'; // minus sign

	/**
	 * The sufixes for exponents (singular and plural)
	 * Names partly based on:
	 * http://german.about.com/library/blzahlenaud.htm
	 * http://www3.osk.3web.ne.jp/~nagatani/common/zahlwort.htm
	 * @var array
	 * @access private
	 */
	var $_exponent = array(
		0 => array(''),
		3 => array('tausend','tausend'),
		6 => array('Million','Millionen'),
		9 => array('Milliarde','Milliarden'),
	   12 => array('Billion','Billionen'),
	   15 => array('Billiarde','Billiarden'),
	   18 => array('Trillion','Trillionen'),
	   21 => array('Trilliarde','Trilliarden'),
	   24 => array('Quadrillion','Quadrillionen'),
	   27 => array('Quadrilliarde','Quadrilliarden'),
	   30 => array('Quintillion','Quintillionen'),
	   33 => array('Quintilliarde','Quintilliarden'),
	   36 => array('Sextillion','Sextillionen'),
	   39 => array('Sextilliarde','Sextilliarden'),
	   42 => array('Septillion','Septillionen'),
	   45 => array('Septilliarde','Septilliarden'),
	   48 => array('Oktillion','Oktillionen'), // oder Octillionen
	   51 => array('Oktilliarde','Oktilliarden'),
	   54 => array('Nonillion','Nonillionen'),
	   57 => array('Nonilliarde','Nonilliarden'),
	   60 => array('Dezillion','Dezillionen'),
	   63 => array('Dezilliarde','Dezilliarden'),
	  120 => array('Vigintillion','Vigintillionen'),
	  123 => array('Vigintilliarde','Vigintilliarden'),
	  600 => array('Zentillion','Zentillionen'), // oder Centillion
	  603 => array('Zentilliarde','Zentilliarden')
		);

	/**
	 * The array containing the digits (indexed by the digits themselves).
	 * @var array
	 * @access private
	 */
	var $_digits = array(
		0 => 'null', 'ein', 'zwei', 'drei', 'vier',
		'fünf', 'sechs', 'sieben', 'acht', 'neun'
	);

	/**
	 * The word separator
	 * @var string
	 * @access private
	 */
	var $_sep = '';

	/**
	 * The exponent word separator
	 * @var string
	 * @access private
	 */
	var $_sep2 = ' ';

	// }}}
	// {{{ _toWords()

	/**
	 * Converts a number to its word representation
	 * in German language.
	 *
	 * @param integer $num       An integer between -infinity and infinity inclusive :)
	 *                           that need to be converted to words
	 * @param integer $power     The power of ten for the rest of the number to the right.
	 *                           Optional, defaults to 0.
	 * @param integer $powsuffix The power name to be added to the end of the return string.
	 *                           Used internally. Optional, defaults to ''.
	 *
	 * @return string  The corresponding word representation
	 *
	 * @access protected
	 * @author Piotr Klaban <makler@man.torun.pl>
	 * @since  Numbers_Words 0.16.3
	 */
	function _toWords($num, $power = 0, $powsuffix = '')
	{
		$ret = '';

		// add a minus sign
		if (substr($num, 0, 1) == '-') {
			$ret = $this->_sep . $this->_minus;
			$num = substr($num, 1);
		}

		// strip excessive zero signs and spaces
		$num = trim($num);
		$num = preg_replace('/^0+/', '', $num);

		if (strlen($num) > 3) {
			$maxp = strlen($num)-1;
			$curp = $maxp;
			for ($p = $maxp; $p > 0; --$p) { // power
				// check for highest power
				if (isset($this->_exponent[$p])) {
					// send substr from $curp to $p
					$snum = substr($num, $maxp - $curp, $curp - $p + 1);
					$snum = preg_replace('/^0+/', '', $snum);
					if ($snum !== '') {
						$cursuffix = $this->_exponent[$power][count($this->_exponent[$power])-1];
						if ($powsuffix != '') {
							$cursuffix .= $this->_sep . $powsuffix;
						}

						$ret .= $this->_toWords($snum, $p, $cursuffix);
					}
					$curp = $p - 1;
					continue;
				}
			}
			$num = substr($num, $maxp - $curp, $curp - $p + 1);
			if ($num == 0) {
				return $ret;
			}
		} elseif ($num == 0 || $num == '') {
			return $this->_sep . $this->_digits[0];
		}

		$h = $t = $d = 0;

		switch (strlen($num)) {
			case 3:
				$h = (int) substr($num, -3, 1);

			case 2:
				$t = (int) substr($num, -2, 1);

			case 1:
				$d = (int) substr($num, -1, 1);
			break;

			case 0:
			return;
			break;
		}

		if ($h) {
			$ret .= $this->_sep . $this->_digits[$h] . $this->_sep . 'hundert';
		}

		if ($t != 1 && $d > 0) { // add digits only in <0>,<1,9> and <21,inf>
			if ($t > 0) {
				$ret .= $this->_digits[$d] . 'und';
			} else {
				$ret .= $this->_digits[$d];
				if ($d == 1) {
					if ($power == 0) {
						$ret .= 's'; // fuer eins
					} else {
						if ($power != 3) {  // tausend ausnehmen
							$ret .= 'e'; // fuer eine
						}
					}
				}
			}
		}

		// ten, twenty etc.
		switch ($t) {
			case 9:
			case 8:
			case 5:
				$ret .= $this->_sep . $this->_digits[$t] . 'zig';
			break;

			case 7:
				$ret .= $this->_sep . 'siebzig';
			break;

			case 6:
				$ret .= $this->_sep . 'sechzig';
			break;

			case 4:
				$ret .= $this->_sep . 'vierzig';
			break;

			case 3:
				$ret .= $this->_sep . 'dreißig';
			break;

			case 2:
				$ret .= $this->_sep . 'zwanzig';
			break;

			case 1:
				switch ($d) {
					case 0:
						$ret .= $this->_sep . 'zehn';
					break;

					case 1:
						$ret .= $this->_sep . 'elf';
					break;

					case 2:
						$ret .= $this->_sep . 'zwölf';
					break;

					case 3:
					case 4:
					case 5:
					case 8:
					case 9:
						$ret .= $this->_sep . $this->_digits[$d] . 'zehn';
					break;

					case 6:
						$ret .= $this->_sep . 'sechzehn';
					break;

					case 7:
						$ret .= $this->_sep . 'siebzehn';
					break;
				}
			break;
		}

		if ($power > 0) {
			if (isset($this->_exponent[$power])) {
				$lev = $this->_exponent[$power];
			}

			if (!isset($lev) || !is_array($lev)) {
				return null;
			}

			if ($power == 3) {
				$ret .= $this->_sep . $lev[0];
			} elseif ($d == 1 && ($t+$h) == 0) {
				$ret .= $this->_sep2 . $lev[0] . $this->_sep2;
			} else {
				$ret .= $this->_sep2 . $lev[1] . $this->_sep2;
			}
		}

		if ($powsuffix != '') {
			$ret .= $this->_sep . $powsuffix;
		}

		return $ret;
	}
	// }}}
}