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<hr><h1>rtree.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< RTREE.H >-------------------------------------------------------*--------*</span>
00002 <span class="comment">// FastDB Version 1.0 (c) 1999 GARRET * ? *</span>
00003 <span class="comment">// (Post Relational Database Management System) * /\| *</span>
00004 <span class="comment">// * / \ *</span>
00005 <span class="comment">// Created: 22-Nov-2001 K.A. Knizhnik * / [] \ *</span>
00006 <span class="comment">// Last update: 22-Nov-2001 K.A. Knizhnik * GARRET *</span>
00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>
00008 <span class="comment">// R-tree: spatial index</span>
00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>
00010
00011 <span class="preprocessor">#ifndef __RTREE_H__</span>
00012 <span class="preprocessor"></span><span class="preprocessor">#define __RTREE_H__</span>
00013 <span class="preprocessor"></span>
00014 <span class="preprocessor">#include "rectangle.h"</span>
00015
00016 BEGIN_FASTDB_NAMESPACE
00017
00018 <span class="preprocessor">#define MAX_RTREE_HEIGHT 8</span>
00019 <span class="preprocessor"></span>
00020 <span class="keyword">class </span><a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>;
00021
00022 <span class="keyword">class </span>dbRtreePage {
00023 <span class="keyword">public</span>:
00024 <span class="keyword">struct </span>branch {
00025 <a class="code" href="classrectangle.html">rectangle</a> rect;
00026 oid_t p;
00027 };
00028
00029 <span class="keyword">enum</span> {
00030 card = (dbPageSize - 4) / <span class="keyword">sizeof</span>(branch), <span class="comment">// maximal number of branches at page</span>
00031 min_fill = card/2 <span class="comment">// minimal number of branches at non-root page</span>
00032 };
00033
00034 <span class="keyword">struct </span>reinsert_list {
00035 oid_t chain;
00036 <span class="keywordtype">int</span> level;
00037 reinsert_list() { chain = 0; }
00038 };
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, <span class="keywordtype">int</span> level) <span class="keyword">const</span>;
00041 <span class="keyword">static</span> <span class="keywordtype">bool</span> find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t rootId, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc, <span class="keywordtype">int</span> level);
00042
00043 <span class="keyword">static</span> oid_t insert(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classrectangle.html">rectangle</a> <span class="keyword">const</span>& r, oid_t pageId, oid_t recordId, <span class="keywordtype">int</span> level);
00044
00045 <span class="keyword">static</span> <span class="keywordtype">bool</span> remove(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, <a class="code" href="classrectangle.html">rectangle</a> <span class="keyword">const</span>& r, oid_t pageId, oid_t recordId,
00046 <span class="keywordtype">int</span> level, reinsert_list& rlist);
00047
00048 <span class="keywordtype">void</span> cover(<a class="code" href="classrectangle.html">rectangle</a>& r) <span class="keyword">const</span>;
00049 <span class="keyword">static</span> <span class="keywordtype">void</span> cover(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t pageId, <a class="code" href="classrectangle.html">rectangle</a>& r);
00050
00051 <span class="keyword">static</span> oid_t add_branch(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t pageId, branch <span class="keyword">const</span>& br);
00052
00053 <span class="keywordtype">void</span> remove_branch(<span class="keywordtype">int</span> i);
00054
00055 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t pageId, <span class="keywordtype">int</span> level);
00056
00057 oid_t next_reinsert_page()<span class="keyword"> const </span>{
00058 <span class="keywordflow">return</span> b[card-1].p;
00059 }
00060
00061 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t recordId, <a class="code" href="classrectangle.html">rectangle</a> <span class="keyword">const</span>& r);
00062 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t rootId, oid_t p);
00063
00064 int4 n; <span class="comment">// number of branches at page</span>
00065 branch b[card];
00066 };
00067
00068 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbRtree {
00069 <span class="keyword">public</span>:
00070 <span class="keyword">enum</span> searchOp {
00071 EQUAL,
00072 OVERLAPS,
00073 SUPERSET,
00074 PROPER_SUPERSET,
00075 SUBSET,
00076 PROPER_SUBSET
00077 };
00078
00079 <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db);
00080 <span class="keyword">static</span> <span class="keywordtype">bool</span> find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>& sc);
00081 <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, <span class="keywordtype">int</span> offs);
00082 <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, <a class="code" href="classrectangle.html">rectangle</a> <span class="keyword">const</span>& r);
00083 <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, <span class="keywordtype">int</span> offs);
00084 <span class="keyword">static</span> <span class="keywordtype">void</span> purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);
00085 <span class="keyword">static</span> <span class="keywordtype">void</span> drop(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t treeId);
00086
00087 <span class="keyword">protected</span>:
00088 int4 height;
00089 oid_t root;
00090 };
00091
00092 END_FASTDB_NAMESPACE
00093
00094 <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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