8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
268 lines
10 KiB
PHP
268 lines
10 KiB
PHP
<?php
|
|
/**
|
|
* Zend Framework
|
|
*
|
|
* LICENSE
|
|
*
|
|
* This source file is subject to the new BSD license that is bundled
|
|
* with this package in the file LICENSE.txt.
|
|
* It is also available through the world-wide-web at this URL:
|
|
* http://framework.zend.com/license/new-bsd
|
|
* If you did not receive a copy of the license and are unable to
|
|
* obtain it through the world-wide-web, please send an email
|
|
* to license@zend.com so we can send you a copy immediately.
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Search_Lucene
|
|
* @subpackage Index
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
* @version $Id: DictionaryLoader.php 16971 2009-07-22 18:05:45Z mikaelkael $
|
|
*/
|
|
|
|
/**
|
|
* Dictionary loader
|
|
*
|
|
* It's a dummy class which is created to encapsulate non-good structured code.
|
|
* Manual "method inlining" is performed to increase dictionary index loading operation
|
|
* which is major bottelneck for search performance.
|
|
*
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Search_Lucene
|
|
* @subpackage Index
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
*/
|
|
class Zend_Search_Lucene_Index_DictionaryLoader
|
|
{
|
|
/**
|
|
* Dictionary index loader.
|
|
*
|
|
* It takes a string which is actually <segment_name>.tii index file data and
|
|
* returns two arrays - term and tremInfo lists.
|
|
*
|
|
* See Zend_Search_Lucene_Index_SegmintInfo class for details
|
|
*
|
|
* @param string $data
|
|
* @return array
|
|
* @throws Zend_Search_Lucene_Exception
|
|
*/
|
|
public static function load($data)
|
|
{
|
|
$termDictionary = array();
|
|
$termInfos = array();
|
|
$pos = 0;
|
|
|
|
// $tiVersion = $tiiFile->readInt();
|
|
$tiVersion = ord($data[0]) << 24 | ord($data[1]) << 16 | ord($data[2]) << 8 | ord($data[3]);
|
|
$pos += 4;
|
|
if ($tiVersion != (int)0xFFFFFFFE /* pre-2.1 format */ &&
|
|
$tiVersion != (int)0xFFFFFFFD /* 2.1+ format */) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception('Wrong TermInfoIndexFile file format');
|
|
}
|
|
|
|
// $indexTermCount = $tiiFile->readLong();
|
|
if (PHP_INT_SIZE > 4) {
|
|
$indexTermCount = ord($data[$pos]) << 56 |
|
|
ord($data[$pos+1]) << 48 |
|
|
ord($data[$pos+2]) << 40 |
|
|
ord($data[$pos+3]) << 32 |
|
|
ord($data[$pos+4]) << 24 |
|
|
ord($data[$pos+5]) << 16 |
|
|
ord($data[$pos+6]) << 8 |
|
|
ord($data[$pos+7]);
|
|
} else {
|
|
if ((ord($data[$pos]) != 0) ||
|
|
(ord($data[$pos+1]) != 0) ||
|
|
(ord($data[$pos+2]) != 0) ||
|
|
(ord($data[$pos+3]) != 0) ||
|
|
((ord($data[$pos+4]) & 0x80) != 0)) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception('Largest supported segment size (for 32-bit mode) is 2Gb');
|
|
}
|
|
|
|
$indexTermCount = ord($data[$pos+4]) << 24 |
|
|
ord($data[$pos+5]) << 16 |
|
|
ord($data[$pos+6]) << 8 |
|
|
ord($data[$pos+7]);
|
|
}
|
|
$pos += 8;
|
|
|
|
// $tiiFile->readInt(); // IndexInterval
|
|
$pos += 4;
|
|
|
|
// $skipInterval = $tiiFile->readInt();
|
|
$skipInterval = ord($data[$pos]) << 24 | ord($data[$pos+1]) << 16 | ord($data[$pos+2]) << 8 | ord($data[$pos+3]);
|
|
$pos += 4;
|
|
if ($indexTermCount < 1) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception('Wrong number of terms in a term dictionary index');
|
|
}
|
|
|
|
if ($tiVersion == (int)0xFFFFFFFD /* 2.1+ format */) {
|
|
/* Skip MaxSkipLevels value */
|
|
$pos += 4;
|
|
}
|
|
|
|
$prevTerm = '';
|
|
$freqPointer = 0;
|
|
$proxPointer = 0;
|
|
$indexPointer = 0;
|
|
for ($count = 0; $count < $indexTermCount; $count++) {
|
|
//$termPrefixLength = $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$termPrefixLength = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$termPrefixLength |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
|
|
// $termSuffix = $tiiFile->readString();
|
|
$nbyte = ord($data[$pos++]);
|
|
$len = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$len |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
if ($len == 0) {
|
|
$termSuffix = '';
|
|
} else {
|
|
$termSuffix = substr($data, $pos, $len);
|
|
$pos += $len;
|
|
for ($count1 = 0; $count1 < $len; $count1++ ) {
|
|
if (( ord($termSuffix[$count1]) & 0xC0 ) == 0xC0) {
|
|
$addBytes = 1;
|
|
if (ord($termSuffix[$count1]) & 0x20 ) {
|
|
$addBytes++;
|
|
|
|
// Never used for Java Lucene created index.
|
|
// Java2 doesn't encode strings in four bytes
|
|
if (ord($termSuffix[$count1]) & 0x10 ) {
|
|
$addBytes++;
|
|
}
|
|
}
|
|
$termSuffix .= substr($data, $pos, $addBytes);
|
|
$pos += $addBytes;
|
|
$len += $addBytes;
|
|
|
|
// Check for null character. Java2 encodes null character
|
|
// in two bytes.
|
|
if (ord($termSuffix[$count1]) == 0xC0 &&
|
|
ord($termSuffix[$count1+1]) == 0x80 ) {
|
|
$termSuffix[$count1] = 0;
|
|
$termSuffix = substr($termSuffix,0,$count1+1)
|
|
. substr($termSuffix,$count1+2);
|
|
}
|
|
$count1 += $addBytes;
|
|
}
|
|
}
|
|
}
|
|
|
|
// $termValue = Zend_Search_Lucene_Index_Term::getPrefix($prevTerm, $termPrefixLength) . $termSuffix;
|
|
$pb = 0; $pc = 0;
|
|
while ($pb < strlen($prevTerm) && $pc < $termPrefixLength) {
|
|
$charBytes = 1;
|
|
if ((ord($prevTerm[$pb]) & 0xC0) == 0xC0) {
|
|
$charBytes++;
|
|
if (ord($prevTerm[$pb]) & 0x20 ) {
|
|
$charBytes++;
|
|
if (ord($prevTerm[$pb]) & 0x10 ) {
|
|
$charBytes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($pb + $charBytes > strlen($data)) {
|
|
// wrong character
|
|
break;
|
|
}
|
|
|
|
$pc++;
|
|
$pb += $charBytes;
|
|
}
|
|
$termValue = substr($prevTerm, 0, $pb) . $termSuffix;
|
|
|
|
// $termFieldNum = $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$termFieldNum = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$termFieldNum |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
|
|
// $docFreq = $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$docFreq = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$docFreq |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
|
|
// $freqPointer += $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
$freqPointer += $vint;
|
|
|
|
// $proxPointer += $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
$proxPointer += $vint;
|
|
|
|
if( $docFreq >= $skipInterval ) {
|
|
// $skipDelta = $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
$skipDelta = $vint;
|
|
} else {
|
|
$skipDelta = 0;
|
|
}
|
|
|
|
// $indexPointer += $tiiFile->readVInt();
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint = $nbyte & 0x7F;
|
|
for ($shift=7; ($nbyte & 0x80) != 0; $shift += 7) {
|
|
$nbyte = ord($data[$pos++]);
|
|
$vint |= ($nbyte & 0x7F) << $shift;
|
|
}
|
|
$indexPointer += $vint;
|
|
|
|
|
|
// $this->_termDictionary[] = new Zend_Search_Lucene_Index_Term($termValue, $termFieldNum);
|
|
$termDictionary[] = array($termFieldNum, $termValue);
|
|
|
|
$termInfos[] =
|
|
// new Zend_Search_Lucene_Index_TermInfo($docFreq, $freqPointer, $proxPointer, $skipDelta, $indexPointer);
|
|
array($docFreq, $freqPointer, $proxPointer, $skipDelta, $indexPointer);
|
|
|
|
$prevTerm = $termValue;
|
|
}
|
|
|
|
// Check special index entry mark
|
|
if ($termDictionary[0][0] != (int)0xFFFFFFFF) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception('Wrong TermInfoIndexFile file format');
|
|
}
|
|
|
|
if (PHP_INT_SIZE > 4) {
|
|
// Treat 64-bit 0xFFFFFFFF as -1
|
|
$termDictionary[0][0] = -1;
|
|
}
|
|
|
|
return array($termDictionary, $termInfos);
|
|
}
|
|
}
|
|
|