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<hr><h1>set.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< SET.H >---------------------------------------------------------*--------*</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: 17-Jan-99 K.A. Knizhnik * / [] \ *</span>
00006 <span class="comment">// Last update: 25-Jan-99 K.A. Knizhnik * GARRET *</span>
00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>
00008 <span class="comment">// Small set implementation. Number of elements in the set should</span>
00009 <span class="comment">// not be greater than 64. Template class is used to allow static</span>
00010 <span class="comment">// type checking for different sets.</span>
00011 <span class="comment">//-------------------------------------------------------------------*--------*</span>
00012
00013 <span class="preprocessor">#ifndef __SET_H__</span>
00014 <span class="preprocessor"></span><span class="preprocessor">#define __SET_H__</span>
00015 <span class="preprocessor"></span>
00016 BEGIN_FASTDB_NAMESPACE
00017
00023 <span class="keyword">template</span><<span class="keyword">class</span> T>
<a name="l00024"></a><a class="code" href="classdbSet.html">00024</a> <span class="keyword">class </span><a class="code" href="classdbSet.html">dbSet</a> {
00025 <span class="keyword">protected</span>:
00026 <span class="keyword">typedef</span> db_int8 set_t;
00027 set_t bits;
00028 <span class="keyword">public</span>:
00029 <a class="code" href="classdbSet.html">dbSet</a>(set_t elements = 0) : bits(elements) {}
00030 <a class="code" href="classdbSet.html">dbSet</a>(T elem) : bits((set_t)1 << elem) {}
00031 <a class="code" href="classdbSet.html">dbSet</a>(<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s) : bits(s.bits) {}
00032
00033 <a class="code" href="classdbSet.html">dbSet</a>(T from, T till) {
00034 assert(from <= till);
00035 bits = ((set_t)1 << till << 1) - ((set_t)1 << till);
00036 }
00037
00038 <span class="keywordtype">bool</span> operator == (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00039 <span class="keywordflow">return</span> bits == s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;
00040 }
00041 <span class="keywordtype">bool</span> operator != (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00042 <span class="keywordflow">return</span> bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;
00043 }
00044 <span class="keywordtype">bool</span> operator == (T elem)<span class="keyword"> const </span>{
00045 <span class="keywordflow">return</span> bits == ((set_t)1 << elem);
00046 }
00047 <span class="keywordtype">bool</span> operator != (T elem)<span class="keyword"> const </span>{
00048 <span class="keywordflow">return</span> bits != ((set_t)1 << elem);
00049 }
00050 <span class="keywordtype">bool</span> operator <= (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00051 <span class="keywordflow">return</span> (bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>) == 0;
00052 }
00053 <span class="keywordtype">bool</span> operator >= (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00054 <span class="keywordflow">return</span> (s.<a class="code" href="classdbSet.html#dbSetn0">bits</a> & ~bits) == 0;
00055 }
00056 <span class="keywordtype">bool</span> operator < (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00057 <span class="keywordflow">return</span> (bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;
00058 }
00059 <span class="keywordtype">bool</span> operator > (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00060 <span class="keywordflow">return</span> (s.<a class="code" href="classdbSet.html#dbSetn0">bits</a> & ~bits) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;
00061 }
00062 <a class="code" href="classdbSet.html">dbSet</a> operator + (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00063 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);
00064 <span class="keywordflow">return</span> result;
00065 }
00066 <a class="code" href="classdbSet.html">dbSet</a> operator + (T elem)<span class="keyword"> const </span>{
00067 <a class="code" href="classdbSet.html">dbSet</a> result(bits | ((set_t)1 << elem));
00068 <span class="keywordflow">return</span> result;
00069 }
00070 <a class="code" href="classdbSet.html">dbSet</a> operator - (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00071 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);
00072 <span class="keywordflow">return</span> result;
00073 }
00074 <a class="code" href="classdbSet.html">dbSet</a> operator - (T elem)<span class="keyword"> const </span>{
00075 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~((set_t)1 << elem));
00076 <span class="keywordflow">return</span> result;
00077 }
00078 <a class="code" href="classdbSet.html">dbSet</a> operator * (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s)<span class="keyword"> const </span>{
00079 <a class="code" href="classdbSet.html">dbSet</a> result(bits & s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);
00080 <span class="keywordflow">return</span> result;
00081 }
00082 <a class="code" href="classdbSet.html">dbSet</a> operator * (T elem)<span class="keyword"> const </span>{
00083 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ((set_t)1 << elem));
00084 <span class="keywordflow">return</span> result;
00085 }
00086 <span class="keywordtype">bool</span> has(T elem)<span class="keyword"> const </span>{
00087 <span class="keywordflow">return</span> (bits & ((set_t)1 << elem)) != 0;
00088 }
00089 <span class="keywordtype">bool</span> empty() {
00090 <span class="keywordflow">return</span> bits == 0;
00091 }
00092 <a class="code" href="classdbSet.html">dbSet</a> operator += (T elem) {
00093 bits |= (set_t)1 << elem;
00094 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00095 }
00096 <a class="code" href="classdbSet.html">dbSet</a> operator -= (T elem) {
00097 bits &= ~((set_t)1 << elem);
00098 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00099 }
00100 <a class="code" href="classdbSet.html">dbSet</a> operator = (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s) {
00101 bits = s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>;
00102 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00103 }
00104 <a class="code" href="classdbSet.html">dbSet</a> operator = (T elem) {
00105 bits = (set_t)1 << elem;
00106 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00107 }
00108
00109 <a class="code" href="classdbSet.html">dbSet</a> operator, (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s) {
00110 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetn0">bits</a>);
00111 <span class="keywordflow">return</span> result;
00112 }
00113 <a class="code" href="classdbSet.html">dbSet</a> operator, (T elem) {
00114 <a class="code" href="classdbSet.html">dbSet</a> result(bits | ((set_t)1 << elem));
00115 <span class="keywordflow">return</span> result;
00116 }
00117
00118 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator == (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00119 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00120 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"="</span>,bits;
00121 <span class="keywordflow">return</span> expr;
00122 }
00123 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator != (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00124 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00125 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;
00126 <span class="keywordflow">return</span> expr;
00127 }
00128 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator <= (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00129 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00130 expr = <span class="stringliteral">"(not"</span>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"and"</span>,bits,<span class="stringliteral">")=0"</span>;
00131 <span class="keywordflow">return</span> expr;
00132 }
00133 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator >= (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00134 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00135 expr = <span class="stringliteral">"(not"</span>,bits,<span class="stringliteral">"and"</span>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">")=0"</span>;
00136 <span class="keywordflow">return</span> expr;
00137 }
00138 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator < (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00139 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00140 expr = <span class="stringliteral">"(not"</span>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"and"</span>,bits,<span class="stringliteral">")=0 and"</span>,
00141 <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;
00142 <span class="keywordflow">return</span> expr;
00143 }
00144 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator > (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00145 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00146 expr = <span class="stringliteral">"(not"</span>,bits,<span class="stringliteral">"and"</span>,<a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">")=0 and"</span>,
00147 <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;
00148 <span class="keywordflow">return</span> expr;
00149 }
00150 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> has(<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {
00151 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;
00152 expr = <span class="stringliteral">"("</span>,bits,<span class="stringliteral">"and 2^"</span>,<a class="code" href="classdbComponent.html">dbComponent</a>(field),<span class="stringliteral">") <> 0"</span>;
00153 <span class="keywordflow">return</span> expr;
00154 }
00155
00156 CLASS_DESCRIPTOR(<a class="code" href="classdbSet.html">dbSet</a>, (FIELD(bits), METHOD(empty)));
00157 };
00158
00159 END_FASTDB_NAMESPACE
00160
00161 <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
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.18 </small></address>
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