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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>set.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.2.15 --><center><a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> </center><hr><h1>set.h</h1><div class="fragment"><pre>00001 <font class="comment">//-< SET.H >---------------------------------------------------------*--------*</font>00002 <font class="comment">// FastDB Version 1.0 (c) 1999 GARRET * ? *</font>00003 <font class="comment">// (Main Memory Database Management System) * /\| *</font>00004 <font class="comment">// * / \ *</font>00005 <font class="comment">// Created: 17-Jan-99 K.A. Knizhnik * / [] \ *</font>00006 <font class="comment">// Last update: 25-Jan-99 K.A. Knizhnik * GARRET *</font>00007 <font class="comment">//-------------------------------------------------------------------*--------*</font>00008 <font class="comment">// Small set implementation. Number of elements in the set should</font>00009 <font class="comment">// not be greater than 64. Template class is used to allow static</font>00010 <font class="comment">// type checking for different sets.</font>00011 <font class="comment">//-------------------------------------------------------------------*--------*</font>00012 00013 <font class="preprocessor">#ifndef __SET_H__</font>00014 <font class="preprocessor"></font><font class="preprocessor">#define __SET_H__</font>00015 <font class="preprocessor"></font>00021 <font class="keyword">template</font><<font class="keyword">class</font> T><a name="l00022"></a><a class="code" href="classdbSet.html">00022</a> <font class="keyword">class </font><a class="code" href="classdbSet.html">dbSet</a> { 00023 <font class="keyword">protected</font>:00024 <font class="keyword">typedef</font> db_int8 set_t;00025 set_t bits;00026 <font class="keyword">public</font>:00027 <a class="code" href="classdbSet.html">dbSet</a>(set_t elements = 0) : bits(elements) {}00028 <a class="code" href="classdbSet.html">dbSet</a>(T elem) : bits((set_t)1 << elem) {}00029 <a class="code" href="classdbSet.html">dbSet</a>(<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s) : bits(s.bits) {}00030 00031 <a class="code" href="classdbSet.html">dbSet</a>(T from, T till) {00032 assert(from <= till);00033 bits = ((set_t)1 << till << 1) - ((set_t)1 << till);00034 }00035 00036 <font class="keywordtype">bool</font> operator == (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{00037 <font class="keywordflow">return</font> bits == s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>; 00038 }00039 <font class="keywordtype">bool</font> operator != (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{ 00040 <font class="keywordflow">return</font> bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>; 00041 }00042 <font class="keywordtype">bool</font> operator == (T elem)<font class="keyword"> const </font>{ 00043 <font class="keywordflow">return</font> bits == ((set_t)1 << elem); 00044 }00045 <font class="keywordtype">bool</font> operator != (T elem)<font class="keyword"> const </font>{ 00046 <font class="keywordflow">return</font> bits != ((set_t)1 << elem); 00047 }00048 <font class="keywordtype">bool</font> operator <= (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{ 00049 <font class="keywordflow">return</font> (bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>) == 0; 00050 }00051 <font class="keywordtype">bool</font> operator >= (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{ 00052 <font class="keywordflow">return</font> (s.<a class="code" href="classdbSet.html#dbSetn0">bits</a> & ~bits) == 0; 00053 }00054 <font class="keywordtype">bool</font> operator < (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{ 00055 <font class="keywordflow">return</font> (bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>; 00056 }00057 <font class="keywordtype">bool</font> operator > (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{ 00058 <font class="keywordflow">return</font> (s.<a class="code" href="classdbSet.html#dbSetn0">bits</a> & ~bits) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>; 00059 }00060 <a class="code" href="classdbSet.html">dbSet</a> operator + (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{00061 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);00062 <font class="keywordflow">return</font> result;00063 }00064 <a class="code" href="classdbSet.html">dbSet</a> operator + (T elem)<font class="keyword"> const </font>{00065 <a class="code" href="classdbSet.html">dbSet</a> result(bits | ((set_t)1 << elem));00066 <font class="keywordflow">return</font> result;00067 }00068 <a class="code" href="classdbSet.html">dbSet</a> operator - (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{00069 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);00070 <font class="keywordflow">return</font> result;00071 }00072 <a class="code" href="classdbSet.html">dbSet</a> operator - (T elem)<font class="keyword"> const </font>{00073 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~((set_t)1 << elem));00074 <font class="keywordflow">return</font> result;00075 }00076 <a class="code" href="classdbSet.html">dbSet</a> operator * (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s)<font class="keyword"> const </font>{00077 <a class="code" href="classdbSet.html">dbSet</a> result(bits & s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);00078 <font class="keywordflow">return</font> result;00079 }00080 <a class="code" href="classdbSet.html">dbSet</a> operator * (T elem)<font class="keyword"> const </font>{00081 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ((set_t)1 << elem));00082 <font class="keywordflow">return</font> result;00083 } 00084 <font class="keywordtype">bool</font> has(T elem)<font class="keyword"> const </font>{ 00085 <font class="keywordflow">return</font> (bits & ((set_t)1 << elem)) != 0;00086 }00087 <font class="keywordtype">bool</font> empty() { 00088 <font class="keywordflow">return</font> bits == 0;00089 }00090 <a class="code" href="classdbSet.html">dbSet</a> operator += (T elem) { 00091 bits |= (set_t)1 << elem;00092 <font class="keywordflow">return</font> *<font class="keyword">this</font>;00093 }00094 <a class="code" href="classdbSet.html">dbSet</a> operator -= (T elem) { 00095 bits &= ~((set_t)1 << elem);00096 <font class="keywordflow">return</font> *<font class="keyword">this</font>;00097 }00098 <a class="code" href="classdbSet.html">dbSet</a> operator = (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s) { 00099 bits = s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;00100 <font class="keywordflow">return</font> *<font class="keyword">this</font>;00101 }00102 <a class="code" href="classdbSet.html">dbSet</a> operator = (T elem) { 00103 bits = (set_t)1 << elem;00104 <font class="keywordflow">return</font> *<font class="keyword">this</font>;00105 }00106 00107 <a class="code" href="classdbSet.html">dbSet</a> operator, (<a class="code" href="classdbSet.html">dbSet</a> <font class="keyword">const</font>& s) {00108 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);00109 <font class="keywordflow">return</font> result;00110 }00111 <a class="code" href="classdbSet.html">dbSet</a> operator, (T elem) {00112 <a class="code" href="classdbSet.html">dbSet</a> result(bits | ((set_t)1 << elem));00113 <font class="keywordflow">return</font> result;00114 }00115 00116 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator == (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00117 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00118 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"="</font>,bits;00119 <font class="keywordflow">return</font> expr;00120 }00121 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator != (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00122 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00123 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"!="</font>,bits;00124 <font class="keywordflow">return</font> expr;00125 }00126 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator <= (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00127 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00128 expr = <font class="stringliteral">"(not"</font>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"and"</font>,bits,<font class="stringliteral">")=0"</font>;00129 <font class="keywordflow">return</font> expr;00130 }00131 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator >= (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00132 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00133 expr = <font class="stringliteral">"(not"</font>,bits,<font class="stringliteral">"and"</font>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">")=0"</font>;00134 <font class="keywordflow">return</font> expr;00135 }00136 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator < (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00137 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00138 expr = <font class="stringliteral">"(not"</font>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"and"</font>,bits,<font class="stringliteral">")=0 and"</font>,00139 <a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"!="</font>,bits;00140 <font class="keywordflow">return</font> expr;00141 }00142 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator > (<font class="keywordtype">char</font> <font class="keyword">const</font>* field) { 00143 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00144 expr = <font class="stringliteral">"(not"</font>,bits,<font class="stringliteral">"and"</font>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">")=0 and"</font>,00145 <a class="code" href="classdbComponent.html">dbComponent</a>(field,<font class="stringliteral">"bits"</font>),<font class="stringliteral">"!="</font>,bits;00146 <font class="keywordflow">return</font> expr;00147 }00148 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> has(<font class="keywordtype">char</font> <font class="keyword">const</font>* field) {00149 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00150 expr = <font class="stringliteral">"("</font>,bits,<font class="stringliteral">"and 2^"</font>,<a class="code" href="classdbComponent.html">dbComponent</a>(field),<font class="stringliteral">") <> 0"</font>;00151 <font class="keywordflow">return</font> expr;00152 } 00153 00154 CLASS_DESCRIPTOR(<a class="code" href="classdbSet.html">dbSet</a>, (FIELD(bits), METHOD(empty)));00155 };00156 00157 <font class="preprocessor">#endif</font></pre></div><hr><address align="right"><small>Generated on Fri Nov 15 21:06:29 2002 for FastDB by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 width=110 height=53></a>1.2.15 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