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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>FastDB: set.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.5 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a></div><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>00021 <span class="keyword">template</span><<span class="keyword">class</span> T><a name="l00022"></a><a class="code" href="classdbSet.html">00022</a> <span class="keyword">class </span><a class="code" href="classdbSet.html">dbSet</a> { 00023 <span class="keyword">protected</span>:00024 <span class="keyword">typedef</span> db_int8 set_t;00025 set_t bits;00026 <span class="keyword">public</span>: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> <span class="keyword">const</span>& 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 <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>{00037 <span class="keywordflow">return</span> bits == s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>; 00038 }00039 <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>{ 00040 <span class="keywordflow">return</span> bits != s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>; 00041 }00042 <span class="keywordtype">bool</span> operator == (T elem)<span class="keyword"> const </span>{ 00043 <span class="keywordflow">return</span> bits == ((set_t)1 << elem); 00044 }00045 <span class="keywordtype">bool</span> operator != (T elem)<span class="keyword"> const </span>{ 00046 <span class="keywordflow">return</span> bits != ((set_t)1 << elem); 00047 }00048 <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>{ 00049 <span class="keywordflow">return</span> (bits & ~s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>) == 0; 00050 }00051 <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>{ 00052 <span class="keywordflow">return</span> (s.<a class="code" href="classdbSet.html#dbSetp0">bits</a> & ~bits) == 0; 00053 }00054 <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>{ 00055 <span class="keywordflow">return</span> (bits & ~s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>; 00056 }00057 <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>{ 00058 <span class="keywordflow">return</span> (s.<a class="code" href="classdbSet.html#dbSetp0">bits</a> & ~bits) == 0 && bits != s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>; 00059 }00060 <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>{00061 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>);00062 <span class="keywordflow">return</span> result;00063 }00064 <a class="code" href="classdbSet.html">dbSet</a> operator + (T elem)<span class="keyword"> const </span>{00065 <a class="code" href="classdbSet.html">dbSet</a> result(bits | ((set_t)1 << elem));00066 <span class="keywordflow">return</span> result;00067 }00068 <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>{00069 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>);00070 <span class="keywordflow">return</span> result;00071 }00072 <a class="code" href="classdbSet.html">dbSet</a> operator - (T elem)<span class="keyword"> const </span>{00073 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ~((set_t)1 << elem));00074 <span class="keywordflow">return</span> result;00075 }00076 <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>{00077 <a class="code" href="classdbSet.html">dbSet</a> result(bits & s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>);00078 <span class="keywordflow">return</span> result;00079 }00080 <a class="code" href="classdbSet.html">dbSet</a> operator * (T elem)<span class="keyword"> const </span>{00081 <a class="code" href="classdbSet.html">dbSet</a> result(bits & ((set_t)1 << elem));00082 <span class="keywordflow">return</span> result;00083 } 00084 <span class="keywordtype">bool</span> has(T elem)<span class="keyword"> const </span>{ 00085 <span class="keywordflow">return</span> (bits & ((set_t)1 << elem)) != 0;00086 }00087 <span class="keywordtype">bool</span> empty() { 00088 <span class="keywordflow">return</span> bits == 0;00089 }00090 <a class="code" href="classdbSet.html">dbSet</a> operator += (T elem) { 00091 bits |= (set_t)1 << elem;00092 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00093 }00094 <a class="code" href="classdbSet.html">dbSet</a> operator -= (T elem) { 00095 bits &= ~((set_t)1 << elem);00096 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00097 }00098 <a class="code" href="classdbSet.html">dbSet</a> operator = (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s) { 00099 bits = s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>;00100 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00101 }00102 <a class="code" href="classdbSet.html">dbSet</a> operator = (T elem) { 00103 bits = (set_t)1 << elem;00104 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00105 }00106 00107 <a class="code" href="classdbSet.html">dbSet</a> operator, (<a class="code" href="classdbSet.html">dbSet</a> <span class="keyword">const</span>& s) {00108 <a class="code" href="classdbSet.html">dbSet</a> result(bits | s.<a class="code" href="classdbSet.html#dbSetp0">bits</a>);00109 <span class="keywordflow">return</span> 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 <span class="keywordflow">return</span> result;00114 }00115 00116 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator == (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00117 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00118 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"="</span>,bits;00119 <span class="keywordflow">return</span> expr;00120 }00121 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator != (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00122 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00123 expr = <a class="code" href="classdbComponent.html">dbComponent</a>(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;00124 <span class="keywordflow">return</span> expr;00125 }00126 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator <= (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00127 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00128 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>;00129 <span class="keywordflow">return</span> expr;00130 }00131 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator >= (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00132 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00133 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>;00134 <span class="keywordflow">return</span> expr;00135 }00136 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator < (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00137 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00138 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>,00139 dbComponent(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;00140 <span class="keywordflow">return</span> expr;00141 }00142 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> operator > (<span class="keywordtype">char</span> <span class="keyword">const</span>* field) { 00143 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00144 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>,00145 dbComponent(field,<span class="stringliteral">"bits"</span>),<span class="stringliteral">"!="</span>,bits;00146 <span class="keywordflow">return</span> expr;00147 }00148 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> has(<span class="keywordtype">char</span> <span class="keyword">const</span>* field) {00149 <a class="code" href="classdbQueryExpression.html">dbQueryExpression</a> expr;00150 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>;00151 <span class="keywordflow">return</span> expr;00152 } 00153 00154 CLASS_DESCRIPTOR(<a class="code" href="classdbSet.html">dbSet</a>, (FIELD(bits), METHOD(empty)));00155 };00156 00157 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Feb 12 13:04:48 2004 for FastDB by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 > </a>1.3.5 </small></address></body></html>⌨️ 快捷键说明
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