8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
144 lines
3.6 KiB
PHP
144 lines
3.6 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Search_Lucene
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* @subpackage Index
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Term.php 16541 2009-07-07 06:59:03Z bkarwin $
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*/
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/**
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* A Term represents a word from text. This is the unit of search. It is
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* composed of two elements, the text of the word, as a string, and the name of
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* the field that the text occured in, an interned string.
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*
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* Note that terms may represent more than words from text fields, but also
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* things like dates, email addresses, urls, etc.
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*
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* @category Zend
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* @package Zend_Search_Lucene
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* @subpackage Index
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Search_Lucene_Index_Term
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{
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/**
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* Field name or field number (depending from context)
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*
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* @var mixed
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*/
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public $field;
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/**
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* Term value
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*
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* @var string
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*/
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public $text;
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/**
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* Object constructor
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*/
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public function __construct($text, $field = null)
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{
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$this->field = ($field === null)? Zend_Search_Lucene::getDefaultSearchField() : $field;
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$this->text = $text;
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}
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/**
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* Returns term key
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*
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* @return string
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*/
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public function key()
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{
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return $this->field . chr(0) . $this->text;
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}
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/**
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* Get term prefix
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*
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* @param string $str
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* @param integer $length
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* @return string
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*/
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public static function getPrefix($str, $length)
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{
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$prefixBytes = 0;
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$prefixChars = 0;
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while ($prefixBytes < strlen($str) && $prefixChars < $length) {
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$charBytes = 1;
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if ((ord($str[$prefixBytes]) & 0xC0) == 0xC0) {
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$charBytes++;
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if (ord($str[$prefixBytes]) & 0x20 ) {
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$charBytes++;
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if (ord($str[$prefixBytes]) & 0x10 ) {
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$charBytes++;
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}
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}
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}
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if ($prefixBytes + $charBytes > strlen($str)) {
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// wrong character
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break;
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}
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$prefixChars++;
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$prefixBytes += $charBytes;
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}
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return substr($str, 0, $prefixBytes);
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}
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/**
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* Get UTF-8 string length
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*
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* @param string $str
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* @return string
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*/
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public static function getLength($str)
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{
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$bytes = 0;
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$chars = 0;
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while ($bytes < strlen($str)) {
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$charBytes = 1;
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if ((ord($str[$bytes]) & 0xC0) == 0xC0) {
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$charBytes++;
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if (ord($str[$bytes]) & 0x20 ) {
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$charBytes++;
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if (ord($str[$bytes]) & 0x10 ) {
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$charBytes++;
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}
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}
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}
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if ($bytes + $charBytes > strlen($str)) {
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// wrong character
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break;
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}
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$chars++;
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$bytes += $charBytes;
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}
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return $chars;
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}
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}
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