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<?php
/**
* Numbers_Words
*
* PHP version 5
*
* Copyright (c) 1997-2006 The PHP Group
*
* This source file is subject to version 3.01 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_01.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 3.01 http://www.php.net/license/3_01.txt
* @version SVN: $Id$
* @link http://pear.php.net/package/Numbers_Words
*/
/**
* Class for translating numbers into Donald Knuth system, in English language.
*
* @author Piotr Klaban
* @package Numbers_Words
*/
/**
* Include needed files
*/
require_once "Numbers/Words.php";
/**
* Class for translating numbers into Donald Knuth system, in English language.
*
* @category Numbers
* @package Numbers_Words
* @author Piotr Klaban <makler@man.torun.pl>
* @license PHP 3.01 http://www.php.net/license/3_01.txt
* @link http://pear.php.net/package/Numbers_Words
*/
class Numbers_Words_en_100 extends Numbers_Words
{
// {{{ properties
/**
* Locale name
* @var string
* @access public
*/
var $locale = 'en_100';
/**
* Language name in English
* @var string
* @access public
*/
var $lang = 'English (Donald Knuth system)';
/**
* Native language name
* @var string
* @access public
*/
var $lang_native = 'English (Donald Knuth system)';
/**
* The word for the minus sign
* @var string
* @access private
*/
var $_minus = 'minus'; // minus sign
/**
* The sufixes for exponents (singular and plural)
* Names based on:
* http://home.earthlink.net/~mrob/pub/math/largenum.html
* Donald Knuth system (power of 2)
* @var array
* @access private
*/
var $_exponent = array(
0 => array(''),
2 => array('hundred'),
4 => array('myriad'),
8 => array('myllion'),
16 => array('byllion'),
32 => array('tryllion'),
64 => array('quadryllion'),
128 => array('quintyllion'),
256 => array('sextyllion'),
512 => array('septyllion'),
1024 => array('octyllion'),
2048 => array('nonyllion'),
4096 => array('decyllion'),
8192 => array('undecyllion'),
16384 => array('duodecyllion'),
32768 => array('tredecyllion'),
65536 => array('quattuordecyllion'),
131072 => array('quindecyllion'),
262144 => array('sexdecyllion'),
524288 => array('septendecyllion'),
1048576 => array('octodecyllion'),
2097152 => array('novemdecyllion'),
4194304 => array('vigintyllion')
);
/**
* The array containing the digits (indexed by the digits themselves).
* @var array
* @access private
*/
var $_digits = array(
0 => 'zero', 'one', 'two', 'three', 'four',
'five', 'six', 'seven', 'eight', 'nine'
);
/**
* The word separator
* @var string
* @access private
*/
var $_sep = ' ';
// }}}
// {{{ _toWords()
/**
* Converts a number to its word representation
* in Donald Knuth system, in English 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] . $this->_sep . 'hundred';
// in English only - add ' and' for [1-9]01..[1-9]99
// (also for 1001..1099, 10001..10099 but it is harder)
// for now it is switched off, maybe some language purists
// can force me to enable it, or to remove it completely
// if (($t + $d) > 0)
// $ret .= $this->_sep . 'and';
}
// ten, twenty etc.
switch ($t) {
case 9:
case 7:
case 6:
$ret .= $this->_sep . $this->_digits[$t] . 'ty';
break;
case 8:
$ret .= $this->_sep . 'eighty';
break;
case 5:
$ret .= $this->_sep . 'fifty';
break;
case 4:
$ret .= $this->_sep . 'forty';
break;
case 3:
$ret .= $this->_sep . 'thirty';
break;
case 2:
$ret .= $this->_sep . 'twenty';
break;
case 1:
switch ($d) {
case 0:
$ret .= $this->_sep . 'ten';
break;
case 1:
$ret .= $this->_sep . 'eleven';
break;
case 2:
$ret .= $this->_sep . 'twelve';
break;
case 3:
$ret .= $this->_sep . 'thirteen';
break;
case 4:
case 6:
case 7:
case 9:
$ret .= $this->_sep . $this->_digits[$d] . 'teen';
break;
case 5:
$ret .= $this->_sep . 'fifteen';
break;
case 8:
$ret .= $this->_sep . 'eighteen';
break;
}
break;
}
if ($t != 1 && $d > 0) { // add digits only in <0>,<1,9> and <21,inf>
// add minus sign between [2-9] and digit
if ($t > 1) {
$ret .= '-' . $this->_digits[$d];
} else {
$ret .= $this->_sep . $this->_digits[$d];
}
}
if ($power > 0) {
if (isset($this->_exponent[$power])) {
$lev = $this->_exponent[$power];
}
if (!isset($lev) || !is_array($lev)) {
return null;
}
$ret .= $this->_sep . $lev[0];
}
if ($powsuffix != '') {
$ret .= $this->_sep . $powsuffix;
}
return $ret;
}
// }}}
}
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