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<hr><h1>hashtab.h</h1><div class="fragment"><pre>00001 <span class="comment">//-&lt; HASHTAB.CPP &gt;---------------------------------------------------*--------*</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">// Extensible hash table interface</span>
00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>
00010 
00011 <span class="preprocessor">#ifndef __HASHTAB_H__</span>
00012 <span class="preprocessor"></span><span class="preprocessor">#define __HASHTAB_H__</span>
00013 <span class="preprocessor"></span>
00014 BEGIN_FASTDB_NAMESPACE
00015 
00016 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbHashTableItem { 
00017   <span class="keyword">public</span>:
00018     oid_t next;
00019     oid_t record;
00020     nat4  hash;
00021 };
00022 
00023 <span class="keyword">const</span> size_t dbInitHashTableSize = 16*1024-1;
00024 
00025 
00026 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbHashTable { 
00027     nat4  size;
00028     nat4  used;
00029     oid_t page;
00030 
00031     <span class="keyword">static</span> <span class="keywordtype">unsigned</span> stringHashFunction(byte* key, <span class="keywordtype">int</span> keylen);
00032     <span class="keyword">static</span> <span class="keywordtype">int</span> <span class="keyword">const</span> keySize[];
00033         
00034   <span class="keyword">public</span>:
00035     <span class="keyword">static</span> dbHashFunction getHashFunction(<span class="keywordtype">int</span> version);
00036 
00037     <span class="keyword">static</span> oid_t allocate(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, size_t nRows = 0);
00038     
00039     <span class="keyword">static</span> <span class="keywordtype">void</span>  insert(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t hashId, 
00040                         oid_t rowId, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, <span class="keywordtype">int</span> offs, size_t nRows);
00041     
00042     <span class="keyword">static</span> <span class="keywordtype">void</span>  remove(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t hashId, 
00043                         oid_t rowId, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> sizeofType, <span class="keywordtype">int</span> offs);
00044     
00045     <span class="keyword">static</span> <span class="keywordtype">void</span>  find(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t hashId, <a class="code" href="classdbSearchContext.html">dbSearchContext</a>&amp; sc);
00046     
00047     <span class="keyword">static</span> <span class="keywordtype">void</span>  drop(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t hashId);
00048 
00049     <span class="keyword">static</span> <span class="keywordtype">void</span>  purge(<a class="code" href="classdbDatabase.html">dbDatabase</a>* db, oid_t hashId);
00050 };
00051 
00052 END_FASTDB_NAMESPACE
00053 
00054 <span class="preprocessor">#endif</span>
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