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<?php
namespace HTML5\Parser;
use \HTML5\Entities;
/**
* Manage entity references.
*/
class CharacterReference {
protected static $numeric_mask = array(0x0, 0x2FFFF, 0, 0xFFFF);
/**
* Given a name (e.g. 'amp'), lookup the UTF-8 character ('&')
*
* @param string $name
* The name to look up.
* @return string
* The character sequence. In UTF-8 this may be more than one byte.
*/
public static function lookupName($name) {
// Do we really want to return NULL here? or FFFD
return isset(Entities::$byName[$name]) ? Entities::$byName[$name] : NULL;
}
/**
* Given a Unicode codepoint, return the UTF-8 character.
*
* (NOT USED ANYWHERE)
*/
/*
public static function lookupCode($codePoint) {
return 'POINT';
}
*/
/**
* Given a decimal number, return the UTF-8 character.
*/
public static function lookupDecimal($int) {
$entity = '&#' . $int . ';';
// UNTESTED: This may fail on some planes. Couldn't find full documentation
// on the value of the mask array.
return mb_decode_numericentity($entity, self::$numeric_mask, 'utf-8');
}
/**
* Given a hexidecimal number, return the UTF-8 character.
*/
public static function lookupHex($hexdec) {
return self::lookupDecimal(hexdec($hexdec));
}
}
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