📄 reference_8h-source.html
字号:
<!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: reference.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>reference.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< REFERENCE.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: 20-Nov-98 K.A. Knizhnik * / [] \ *</span>00006 <span class="comment">// Last update: 15-Feb-99 K.A. Knizhnik * GARRET *</span>00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>00008 <span class="comment">// Database table field reference type</span>00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>00010 00011 <span class="preprocessor">#ifndef __REFERENCE_H__</span>00012 <span class="preprocessor"></span><span class="preprocessor">#define __REFERENCE_H__</span>00013 <span class="preprocessor"></span><a name="l00017"></a><a class="code" href="classdbAnyReference.html">00017</a> <span class="keyword">class </span>FASTDB_DLL_ENTRY dbAnyReference { 00018 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>;00019 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbDatabase.html">dbDatabase</a>;00020 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>;00021 <span class="keyword">protected</span>:00022 oid_t oid;00023 00024 <span class="keyword">public</span>: 00025 dbAnyReference(oid_t oid = 0) { 00026 this->oid = oid;00027 }<a name="l00032"></a><a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4a11">00032</a> oid_t getOid()<span class="keyword"> const </span>{ 00033 <span class="keywordflow">return</span> oid;00034 }00035 <a name="l00039"></a><a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4n0">00039</a> <span class="keyword">friend</span> <span class="keywordtype">bool</span> isNull(dbAnyReference <span class="keyword">const</span>& ref) { 00040 <span class="keywordflow">return</span> ref.<a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4p0">oid</a> == 0; 00041 }00042 <a name="l00046"></a><a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4a12">00046</a> <span class="keywordtype">bool</span> isNull()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> oid == 0; }00047 00048 <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* dbDescribeComponents(<a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* fd) {00049 fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro14">type</a> = fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro15">appType</a> = dbField::tpReference;00050 fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro10">refTable</a> = NULL;00051 fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro22">dbsSize</a> = fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro24">alignment</a> = <span class="keyword">sizeof</span>(oid_t);00052 <span class="keywordflow">return</span> NULL;00053 }00054 };00055 <a name="l00059"></a><a class="code" href="classdbNullReference.html">00059</a> <span class="keyword">class </span>FASTDB_DLL_ENTRY dbNullReference {};00060 00064 <span class="keyword">extern</span> FASTDB_DLL_ENTRY dbNullReference null;00065 00066 <span class="preprocessor">#if (defined(_MSC_VER) && _MSC_VER+0 <= 1100)</span>00067 <span class="preprocessor"></span><span class="comment">//</span>00068 <span class="comment">// Visual C++ prior to 5.0 version (with applied Service Pack 3)</span>00069 <span class="comment">// didn't support lazy template instantiation. As far as VC has bug</span>00070 <span class="comment">// with treating local function prototypes, we have to use friend function.</span>00071 <span class="comment">//</span>00072 <span class="keyword">template</span><<span class="keyword">class</span> T>00073 <span class="keyword">extern</span> <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* dbGetTableDescriptor(T*);00074 <span class="preprocessor">#endif</span>00075 <span class="preprocessor"></span>00076 00080 <span class="keyword">template</span><<span class="keyword">class</span> T><a name="l00081"></a><a class="code" href="classdbReference.html">00081</a> <span class="keyword">class </span><a class="code" href="classdbReference.html">dbReference</a> : <span class="keyword">public</span> dbAnyReference { 00082 <span class="keyword">public</span>:<a name="l00086"></a><a class="code" href="classdbReference.html#dbReferencea0">00086</a> <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* <a class="code" href="classdbReference.html#dbReferencea0">dbDescribeComponents</a>(<a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* fd) { 00087 fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro14">type</a> = fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro15">appType</a> = dbField::tpReference;00088 <span class="preprocessor">#if defined(_MSC_VER) && _MSC_VER+0 <= 1100 </span>00089 <span class="preprocessor"></span> fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro10">refTable</a> = dbGetTableDescriptor((T*)0);00090 <span class="preprocessor">#else</span>00091 <span class="preprocessor"></span><span class="preprocessor">#if defined(__GNUC__) && __GNUC_MINOR__ <= 95</span>00092 <span class="preprocessor"></span> <span class="keyword">extern</span> <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* dbGetTableDescriptor(T*);00093 fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro10">refTable</a> = dbGetTableDescriptor((T*)0);00094 <span class="preprocessor">#else</span>00095 <span class="preprocessor"></span> fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro10">refTable</a> = &T::dbDescriptor;00096 <span class="preprocessor">#endif</span>00097 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00098 <span class="preprocessor"></span> fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro22">dbsSize</a> = fd-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro24">alignment</a> = <span class="keyword">sizeof</span>(oid_t);00099 <span class="keywordflow">return</span> NULL;00100 }00101 <a name="l00107"></a><a class="code" href="classdbReference.html#dbReferencea1">00107</a> <a class="code" href="classdbReference.html">dbReference</a>& <a class="code" href="classdbReference.html#dbReferencea1">operator = </a>(<a class="code" href="classdbReference.html">dbReference</a> <span class="keyword">const</span>& ref) { 00108 oid = ref.<a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4p0">oid</a>;00109 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00110 }00111 <a name="l00116"></a><a class="code" href="classdbReference.html#dbReferencea2">00116</a> <a class="code" href="classdbReference.html">dbReference</a>& <a class="code" href="classdbReference.html#dbReferencea1">operator = </a>(dbNullReference <span class="keyword">const</span>&) { 00117 oid = 0;00118 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00119 }00120 <a name="l00126"></a><a class="code" href="classdbReference.html#dbReferencea3">00126</a> <a class="code" href="classdbReference.html">dbReference<T></a>& <a class="code" href="classdbReference.html#dbReferencea3">unsafeAssign</a>(dbAnyReference <span class="keyword">const</span>& ref) {00127 oid = ref.<a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4a11">getOid</a>();00128 <span class="keywordflow">return</span> *<span class="keyword">this</span>;00129 }00130 <a name="l00134"></a><a class="code" href="classdbReference.html#dbReferencea4">00134</a> <span class="keywordtype">bool</span> <a class="code" href="classdbReference.html#dbReferencea4">operator == </a>(<a class="code" href="classdbReference.html">dbReference</a> <span class="keyword">const</span>& ref)<span class="keyword"> const </span>{ 00135 <span class="keywordflow">return</span> oid == ref.<a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4p0">oid</a>; 00136 }00137 <a name="l00141"></a><a class="code" href="classdbReference.html#dbReferencea5">00141</a> <span class="keywordtype">bool</span> <a class="code" href="classdbReference.html#dbReferencea5">operator != </a>(<a class="code" href="classdbReference.html">dbReference</a> <span class="keyword">const</span>& ref)<span class="keyword"> const </span>{ 00142 <span class="keywordflow">return</span> oid != ref.<a class="code" href="classdbAnyReference.html#dbReference_3_01Version_01_4p0">oid</a>; 00143 }00144 <a name="l00148"></a><a class="code" href="classdbReference.html#dbReferencea6">00148</a> <span class="keywordtype">bool</span> <a class="code" href="classdbReference.html#dbReferencea4">operator == </a>(dbNullReference <span class="keyword">const</span>&)<span class="keyword"> const </span>{ 00149 <span class="keywordflow">return</span> oid == 0;00150 }00151 <a name="l00155"></a><a class="code" href="classdbReference.html#dbReferencea7">00155</a> <span class="keywordtype">bool</span> <a class="code" href="classdbReference.html#dbReferencea5">operator != </a>(dbNullReference <span class="keyword">const</span>&)<span class="keyword"> const </span>{ 00156 <span class="keywordflow">return</span> oid != 0;00157 }00158 <a name="l00162"></a><a class="code" href="classdbReference.html#dbReferencea8">00162</a> <a class="code" href="classdbReference.html#dbReferencea8">dbReference</a>(dbNullReference <span class="keyword">const</span>&) : dbAnyReference(0) {}00163 <a name="l00167"></a><a class="code" href="classdbReference.html#dbReferencea9">00167</a> <a class="code" href="classdbReference.html#dbReferencea8">dbReference</a>(<a class="code" href="classdbReference.html">dbReference</a> <span class="keyword">const</span>& ref) : dbAnyReference(ref.oid) {}00168 <a name="l00175"></a><a class="code" href="classdbReference.html#dbReferencea10">00175</a> <a class="code" href="classdbReference.html#dbReferencea8">dbReference</a>(oid_t oid=0) : dbAnyReference(oid) {}00176 };00177 00178 <span class="preprocessor">#endif</span>00179 <span class="preprocessor"></span>00180 00181 00182 00183 </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
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -