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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: compiler.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>compiler.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< COMPILE.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: 17-Jan-99 K.A. Knizhnik * GARRET *</span>00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>00008 <span class="comment">// Conditional expresion compiler</span>00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>00010 00011 <span class="preprocessor">#ifndef __COMPILER_H__</span>00012 <span class="preprocessor"></span><span class="preprocessor">#define __COMPILER_H__</span>00013 <span class="preprocessor"></span>00014 <span class="preprocessor">#include <setjmp.h></span>00015 00016 <span class="preprocessor">#if defined(__osf__) || defined(__FreeBSD__)</span>00017 <span class="preprocessor"></span><span class="preprocessor">#define longjmp(b,s) _longjmp(b,s) // do not restore signal context</span>00018 <span class="preprocessor"></span><span class="preprocessor">#define setjmp(b) _setjmp(b)</span>00019 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00020 <span class="preprocessor"></span>00021 <span class="keyword">enum</span> dbvmCodes { 00022 <span class="preprocessor">#define DBVM(cop, type, n_operands, commutative) cop,</span>00023 <span class="preprocessor"></span><span class="preprocessor">#include "compiler.d"</span>00024 dbvmLastCode00025 };00026 00027 <span class="preprocessor">#define IS_CONSTANT(c) \</span>00028 <span class="preprocessor">(unsigned(c) - dbvmLoadVarBool <= (unsigned)dbvmLoadVarStdString - dbvmLoadVarBool)</span>00029 <span class="preprocessor"></span>00030 <span class="keyword">enum</span> nodeType { 00031 tpInteger,00032 tpBoolean,00033 tpReal,00034 tpString,00035 tpReference,00036 tpArray,00037 tpRawBinary, 00038 tpFreeVar, <span class="comment">// index of EXISTS clause </span>00039 tpList, <span class="comment">// list of expressions</span>00040 tpVoid00041 };00042 00043 <span class="keyword">enum</span> tokens { 00044 tkn_ident,00045 tkn_lpar,00046 tkn_rpar,00047 tkn_lbr,00048 tkn_rbr,00049 tkn_dot,00050 tkn_comma,00051 tkn_power,00052 tkn_iconst,00053 tkn_sconst,00054 tkn_fconst,00055 tkn_add,00056 tkn_sub,00057 tkn_mul,00058 tkn_div,00059 tkn_and,00060 tkn_or,00061 tkn_not,00062 tkn_null,00063 tkn_neg,00064 tkn_eq,00065 tkn_ne,00066 tkn_gt,00067 tkn_ge,00068 tkn_lt,00069 tkn_le,00070 tkn_between,00071 tkn_escape,00072 tkn_exists,00073 tkn_like,00074 tkn_in,00075 tkn_length,00076 tkn_lower,00077 tkn_upper,00078 tkn_abs,00079 tkn_is,00080 tkn_integer,00081 tkn_real,00082 tkn_string,00083 tkn_first,00084 tkn_last,00085 tkn_current,00086 tkn_var,00087 tkn_col,00088 tkn_true,00089 tkn_false,00090 tkn_where, 00091 tkn_follow,00092 tkn_start,00093 tkn_from,00094 tkn_order,00095 tkn_by,00096 tkn_asc,00097 tkn_desc, 00098 tkn_eof,00099 tkn_insert, 00100 tkn_into, 00101 tkn_select, 00102 tkn_table,00103 tkn_error,00104 tkn_all, 00105 tkn_last_token00106 }; 00107 00108 <span class="keyword">struct </span>dbStrLiteral { 00109 <span class="keywordtype">char</span>* str;00110 <span class="keywordtype">int</span> len;00111 };00112 00113 00114 <span class="keyword">class </span><a class="code" href="classdbUserFunction.html">dbUserFunction</a>;00115 00116 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbExprNodeAllocator { 00117 <span class="keyword">private</span>:00118 <span class="keyword">friend</span> <span class="keyword">class </span>dbExprNodeSegment;00119 dbExprNode* freeNodeList;00120 dbExprNodeSegment* segmentList;00121 dbMutex mutex;00122 00123 <span class="keyword">public</span>: 00124 dbMutex& getMutex() {00125 <span class="keywordflow">return</span> mutex;00126 }00127 dbExprNode* allocate();00128 <span class="keywordtype">void</span> deallocate(dbExprNode* node);00129 <span class="keywordtype">void</span> reset();00130 00131 ~dbExprNodeAllocator();00132 <span class="keyword">static</span> dbExprNodeAllocator instance;00133 };00134 00135 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbExprNode { 00136 <span class="keyword">friend</span> <span class="keyword">class </span>dbExprNodeSegment;00137 <span class="keyword">public</span>:00138 nat1 cop;00139 nat1 type;00140 nat2 offs;00141 00142 <span class="keyword">static</span> <span class="keyword">const</span> nat1 nodeTypes[];00143 <span class="keyword">static</span> <span class="keyword">const</span> nat1 nodeOperands[];00144 <span class="keyword">static</span> <span class="keyword">const</span> nat1 commutativeOperator[];00145 00146 <span class="keyword">union </span>{ 00147 dbExprNode* operand[3];00148 dbExprNode* next;00149 oid_t oid;00150 db_int8 ivalue;00151 real8 fvalue;00152 dbStrLiteral svalue;00153 <span class="keywordtype">void</span> <span class="keyword">const</span>* var;00154 00155 <span class="keyword">struct </span>{ 00156 dbExprNode* base; <span class="comment">// the same as operand[0]</span>00157 <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* field;00158 } ref;00159 00160 <span class="keyword">struct </span>{ 00161 dbExprNode* arg[3]; 00162 <span class="keywordtype">void</span>* fptr;00163 } func;00164 };00165 00166 dbExprNode(dbExprNode* node);00167 00168 dbExprNode(<span class="keywordtype">int</span> cop, dbExprNode* left = NULL, dbExprNode* right = NULL, 00169 dbExprNode* right2 = NULL)00170 {00171 this->cop = cop;00172 type = nodeTypes[cop];00173 operand[0] = left;00174 operand[1] = right;00175 operand[2] = right2;00176 }00177 dbExprNode(<span class="keywordtype">int</span> cop, dbExprNode* expr1, dbExprNode* expr2, <span class="keywordtype">int</span> offs) { 00178 this->cop = cop;00179 this->offs = (nat2)offs;00180 type = nodeTypes[cop];00181 operand[0] = expr1;00182 operand[1] = expr2;00183 }00184 dbExprNode(<span class="keywordtype">int</span> cop, dbExprNode* expr, <span class="keywordtype">int</span> offs) { 00185 this->cop = cop;00186 this->offs = (nat2)offs;00187 type = nodeTypes[cop];00188 operand[0] = expr;00189 }00190 dbExprNode(<span class="keywordtype">int</span> cop, <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* field, dbExprNode* base = NULL) 00191 {00192 this->cop = cop;00193 this->offs = (nat2)field-><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro17">dbsOffs</a>;00194 type = nodeTypes[cop];00195 ref.field = field;00196 ref.base = base;00197 }00198 dbExprNode(<span class="keywordtype">int</span> cop, db_int8 ivalue) { 00199 this->cop = cop;00200 this->ivalue = ivalue;00201 type = tpInteger;00202 }00203 dbExprNode(<span class="keywordtype">int</span> cop, real8 fvalue) { 00204 this->cop = cop;00205 this->fvalue = fvalue;00206 type = tpReal;00207 }00208 dbExprNode(<span class="keywordtype">int</span> cop, dbStrLiteral& svalue) { 00209 this->cop = cop;00210 this->svalue = svalue;00211 type = tpString;00212 }00213 dbExprNode(<span class="keywordtype">int</span> cop, <span class="keywordtype">void</span> <span class="keyword">const</span>* var) { 00214 this->cop = cop;00215 this->var = var;00216 type = nodeTypes[cop];00217 }00218 dbExprNode(<span class="keywordtype">int</span> cop, <span class="keywordtype">void</span>* fptr, dbExprNode* expr1, dbExprNode* expr2 = NULL, dbExprNode* expr3 = NULL) { 00219 this->cop = cop;00220 func.arg[0] = expr1;?? 快捷鍵說(shuō)明
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