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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>FastDB: ttree.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.5 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a></div><h1>ttree.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< TTREE.CPP >-----------------------------------------------------*--------*</span>00002 <span class="comment">// FastDB Version 1.0 (c) 1999 GARRET * ? *</span>00003 <span class="comment">// (Main Memory Database Management System) * /\| *</span>00004 <span class="comment">// * / \ *</span>00005 <span class="comment">// Created: 20-Nov-98 K.A. Knizhnik * / [] \ *</span>00006 <span class="comment">// Last update: 10-Dec-98 K.A. Knizhnik * GARRET *</span>00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>00008 <span class="comment">// T-Tree interface</span>00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>00010 00011 <span class="preprocessor">#ifndef __TTREE_H__</span>00012 <span class="preprocessor"></span><span class="preprocessor">#define __TTREE_H__</span>00013 <span class="preprocessor"></span>00014 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbTtreeNode { 00015 <span class="keyword">enum</span> { 00016 pageSize = 125,00017 minItems = pageSize - 2 <span class="comment">// minimal number of items in internal node</span>00018 };00019 00020 <span class="keyword">public</span>:00021 oid_t left;00022 oid_t right;00023 int1 balance;00024 nat2 nItems;00025 oid_t item[pageSize];00026 00027 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t recordId);00028 00029 <span class="keyword">static</span> <span class="keywordtype">bool</span> insert(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId, oid_t recordId, 00030 <span class="keywordtype">void</span>* key, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);00031 <span class="keyword">static</span> <span class="keywordtype">int</span> remove(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId, oid_t recordId, 00032 <span class="keywordtype">void</span>* key, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);00033 <span class="keyword">static</span> <span class="keywordtype">int</span> balanceRightBranch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId);00034 <span class="keyword">static</span> <span class="keywordtype">int</span> balanceLeftBranch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId);00035 00036 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t nodeId);00037 00038 <span class="keywordtype">bool</span> find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);00039 00040 <span class="keywordtype">bool</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db,<a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);00041 <span class="keywordtype">bool</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);00042 <span class="keywordtype">bool</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db,<a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor,dbExprNode* cond);00043 <span class="keywordtype">bool</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db,<a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor,dbExprNode* cond);00044 };00045 00046 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbTtree { 00047 <span class="keyword">protected</span>:00048 oid_t root;00049 00050 <span class="keyword">public</span>:00051 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db);00052 <span class="keyword">static</span> <span class="keywordtype">void</span> find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);00053 <span class="keyword">static</span> <span class="keywordtype">void</span> insert(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId, oid_t recordId, 00054 <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);00055 <span class="keyword">static</span> <span class="keywordtype">void</span> remove(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId, oid_t recordId,00056 <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);00057 <span class="keyword">static</span> <span class="keywordtype">void</span> drop(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);00058 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);00059 00060 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,00061 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);00062 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,00063 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);00064 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,00065 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor, dbExprNode* condition);00066 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,00067 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor, dbExprNode* condition);00068 };00069 00070 00071 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Feb 12 13:04:48 2004 for FastDB by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 > </a>1.3.5 </small></address></body></html>⌨️ 快捷键说明
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