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<hr><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 BEGIN_FASTDB_NAMESPACE
00015
00016 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbTtreeNode {
00017 <span class="keyword">enum</span> {
00018 pageSize = 125,
00019 minItems = pageSize - 2 <span class="comment">// minimal number of items in internal node</span>
00020 };
00021
00022 <span class="keyword">public</span>:
00023 oid_t left;
00024 oid_t right;
00025 int1 balance;
00026 nat2 nItems;
00027 oid_t item[pageSize];
00028
00029 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t recordId);
00030
00031 <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,
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> remove(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId, oid_t recordId,
00034 <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);
00035 <span class="keyword">static</span> <span class="keywordtype">int</span> balanceRightBranch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId);
00036 <span class="keyword">static</span> <span class="keywordtype">int</span> balanceLeftBranch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t& nodeId);
00037
00038 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t nodeId);
00039
00040 <span class="keywordtype">bool</span> find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);
00041 <span class="keywordtype">bool</span> prefixSearch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);
00042
00043 <span class="keywordtype">bool</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db,<a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);
00044 <span class="keywordtype">bool</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor);
00045 <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);
00046 <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);
00047 };
00048
00049 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbTtree {
00050 <span class="keyword">protected</span>:
00051 oid_t root;
00052
00053 <span class="keyword">public</span>:
00054 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db);
00055 <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);
00056 <span class="keyword">static</span> <span class="keywordtype">void</span> prefixSearch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);
00057 <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,
00058 <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);
00059 <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,
00060 <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, dbUDTComparator comparator, <span class="keywordtype">int</span> offs);
00061 <span class="keyword">static</span> <span class="keywordtype">void</span> drop(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);
00062 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);
00063
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);
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);
00068 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseForward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,
00069 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor, dbExprNode* condition);
00070 <span class="keyword">static</span> <span class="keywordtype">void</span> traverseBackward(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId,
00071 <a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>* cursor, dbExprNode* condition);
00072 };
00073
00074 END_FASTDB_NAMESPACE
00075
00076 <span class="preprocessor">#endif</span>
</pre></div><hr><address style="align: right;"><small>Generated on Thu Feb 14 12:42:30 2008 for FastDB by
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