compiler_8h-source.html

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00212 
00213     <font class="keywordtype">void</font>* operator new(size_t size);
00214 
00215     <font class="keywordtype">void</font> operator delete(<font class="keywordtype">void</font>* ptr) { 
00216         <font class="keywordflow">if</font> (ptr != NULL) { 
00217             dbExprNode* node = (dbExprNode*)ptr;
00218             node-&gt;next = freeNodeList;
00219             freeNodeList = node;
00220         }
00221     }
00222 
00223     <font class="keyword">static</font> <font class="keywordtype">void</font> cleanup();
00224 };
00225 
00226 
00227 <font class="keyword">class </font>dbExprNodeSegment { 
00228   <font class="keyword">public</font>:
00229     <font class="keyword">enum</font> { allocationQuantum = 1024};
00230     <font class="keywordtype">char</font>               buf[<font class="keyword">sizeof</font>(dbExprNode)*allocationQuantum];
00231     dbExprNodeSegment* next;
00232 };
00233 
00234 
00235 <font class="keyword">class </font>dbBinding { 
00236   <font class="keyword">public</font>:
00237     dbBinding*  next;
00238     <font class="keywordtype">char</font> <font class="keyword">const</font>* name;
00239     <font class="keywordtype">bool</font>        used;
00240     <font class="keywordtype">int</font>         index;
00241 };
00242 
00243 <font class="keyword">class </font>dbOrderByNode { 
00244   <font class="keyword">public</font>:
00245     dbOrderByNode*     next;
00246     <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* field;
00247     <font class="keywordtype">bool</font>               stringLength;  <font class="comment">// true if order by length of string instead of string value</font>
00248     <font class="keywordtype">bool</font>               ascent;  <font class="comment">// true for ascent order, false for descent </font>
00249 };
00250 
00251 <font class="keyword">class </font>dbFollowByNode { 
00252   <font class="keyword">public</font>:
00253     dbFollowByNode*    next;
00254     <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* field;
00255 };
00256 
00257 <font class="keyword">class </font>FASTDB_DLL_ENTRY dbCompiler { 
00258     <font class="keyword">friend</font> <font class="keyword">class </font><a class="code" href="classdbQuery.html">dbQuery</a>;
00259     <font class="keyword">friend</font> <font class="keyword">class </font><a class="code" href="classdbQueryElement.html">dbQueryElement</a>;
00260   <font class="keyword">public</font>:
00261     <font class="keyword">enum</font> { 
00262         maxStrLen    = 4096,
00263         maxFreeVars  = 4
00264     };
00265 
00266     <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* table;
00267     <a class="code" href="classdbQueryElement.html">dbQueryElement</a>*    queryElement;
00268     <font class="keywordtype">int</font>                currPos;
00269     <font class="keywordtype">int</font>                firstPos;
00270     <font class="keywordtype">int</font>                offsetWithinStatement;
00271     <font class="keywordtype">int</font>                bvalue;
00272     db_int8               ivalue;
00273     real8              fvalue;
00274     dbStrLiteral       svalue;
00275     <font class="keywordtype">int</font>                lex;
00276     <font class="keywordtype">char</font>*              name;
00277     dbBinding*         bindings;
00278     <font class="keywordtype">int</font>                nFreeVars;
00279     <font class="keywordtype">int</font>                varType;
00280     <font class="keywordtype">void</font> <font class="keyword">const</font>*        varPtr;
00281     <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* varRefTable;
00282 
00283     jmp_buf            abortCompilation;
00284     <font class="keyword">static</font> <font class="keywordtype">bool</font>        initialized;
00285 
00286     <font class="keywordtype">int</font>         compare(dbExprNode* expr, dbExprNode* list);
00287 
00288     <font class="keywordtype">int</font>         scan();
00289     <font class="keywordtype">void</font>        error(<font class="keyword">const</font> <font class="keywordtype">char</font>* msg, <font class="keywordtype">int</font> pos = -1);
00290     dbExprNode* conjunction();    
00291     dbExprNode* disjunction();
00292     dbExprNode* comparison();    
00293     dbExprNode* addition();    
00294     dbExprNode* multiplication();    
00295     dbExprNode* power();
00296     dbExprNode* term();
00297     dbExprNode* userDefinedOperator();
00298     dbExprNode* field(dbExprNode* expr, <a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* refTable,
00299                       <a class="code" href="classdbFieldDescriptor.html">dbFieldDescriptor</a>* fd);
00300 
00301     <font class="keywordtype">bool</font>        compile(<a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* table, <a class="code" href="classdbQuery.html">dbQuery</a>&amp; query);
00302     dbExprNode* compileExpression(<a class="code" href="classdbTableDescriptor.html">dbTableDescriptor</a>* table,  <font class="keywordtype">char</font> <font class="keyword">const</font>* expr, <font class="keywordtype">int</font> startPos);
00303     <font class="keywordtype">void</font>        compileOrderByPart(<a class="code" href="classdbQuery.html">dbQuery</a>&amp; query);
00304     <font class="keywordtype">void</font>        compileStartFollowPart(<a class="code" href="classdbQuery.html">dbQuery</a>&amp; query);
00305 
00306     dbCompiler();
00307 };
00308 
00309 <font class="keyword">class </font>dbDatabaseThreadContext : <font class="keyword">public</font> <a class="code" href="classdbL2List.html">dbL2List</a> { 
00310   <font class="keyword">public</font>:
00311     <font class="keywordtype">int</font> readAccess;
00312     <font class="keywordtype">int</font> writeAccess;
00313     <font class="keywordtype">int</font> concurrentId;
00314     <font class="keywordtype">int</font> mutatorCSLocked;
00315 
00316     <a class="code" href="classdbL2List.html">dbL2List</a> cursors; 
00317     
00318     dbCompiler compiler;
00319 
00320     dbProcessId currPid;
00321 
00322     <font class="keywordtype">bool</font>     interactive;
00323     <font class="keywordtype">bool</font>     catched;
00324     <font class="keywordtype">bool</font>     commitDelayed;
00325     <font class="keywordtype">bool</font>     removeContext;
00326     jmp_buf  unwind;
00327     
00328     dbDatabaseThreadContext() { 
00329         concurrentId = 0;
00330         readAccess = <font class="keyword">false</font>;
00331         writeAccess = <font class="keyword">false</font>;
00332         mutatorCSLocked = <font class="keyword">false</font>;
00333         interactive = <font class="keyword">false</font>;
00334         catched = <font class="keyword">false</font>;
00335         commitDelayed = <font class="keyword">false</font>;
00336         removeContext = <font class="keyword">false</font>;
00337         currPid = dbProcessId::getCurrent();
00338     }
00339 };
00340 
00341 <font class="keyword">union </font>dbSynthesizedAttribute { 
00342     byte* base;
00343     <font class="keywordtype">int</font>   bvalue;
00344     db_int8  ivalue;
00345     real8 fvalue;
00346     <font class="keywordtype">void</font>* raw;
00347     oid_t oid;
00348 
00349     <font class="keyword">struct </font>{ 
00350         <font class="keywordtype">char</font>* base;
00351         <font class="keywordtype">int</font>   size;
00352     } array;
00353 };
00354 
00355 <font class="keyword">struct </font>dbStringValue;
00356 
00357 <font class="keyword">struct </font>FASTDB_DLL_ENTRY dbInheritedAttribute { 
00358     byte*          record;
00359     oid_t          oid;
00360     <a class="code" href="classdbTable.html">dbTable</a>*       table;
00361     <a class="code" href="classdbDatabase.html">dbDatabase</a>*    db;
00362     dbStringValue* tempStrings;
00363     size_t         paramBase;
00364     <font class="keyword">enum</font> { 
00365         internalStrBufSize = 8*1024 
00366     };
00367     size_t         strBufPos;
00368     <font class="keywordtype">char</font>           strBuf[internalStrBufSize];
00369     
00370     <font class="keyword">struct </font>{ 
00371         <font class="keywordtype">int</font>     index;
00372         jmp_buf unwind;
00373     } exists_iterator[dbCompiler::maxFreeVars];
00374 
00375     <font class="keywordtype">void</font> removeTemporaries();
00376 
00377     dbInheritedAttribute() { 
00378         tempStrings = NULL;
00379         strBufPos = 0;
00380     }
00381 
00382     ~dbInheritedAttribute() { 
00383         removeTemporaries(); 
00384     }
00385 };
00386 
00387 <font class="keyword">struct </font>dbStringValue { 
00388     dbStringValue* next;
00389     <font class="keywordtype">char</font>           str[1];
00390 
00391     <font class="keyword">static</font> <font class="keywordtype">char</font>* create(size_t size, dbInheritedAttribute&amp; attr) { 
00392         <font class="keywordflow">if</font> (attr.strBufPos + size &gt; <font class="keyword">sizeof</font>(attr.strBuf)) { 
00393             dbStringValue* sv = 
00394                 (dbStringValue*)<font class="keyword">new</font> <font class="keywordtype">char</font>[offsetof(dbStringValue, str) + size];
00395             sv-&gt;next = attr.tempStrings;
00396             attr.tempStrings = sv;
00397             <font class="keywordflow">return</font> sv-&gt;str;
00398         } <font class="keywordflow">else</font> { 
00399             <font class="keywordtype">char</font>* p = attr.strBuf + attr.strBufPos;
00400             attr.strBufPos += size;
00401             <font class="keywordflow">return</font> p;
00402         }
00403     }
00404 
00405     <font class="keyword">static</font> <font class="keywordtype">char</font>* create(<font class="keywordtype">char</font> <font class="keyword">const</font>* s, dbInheritedAttribute&amp; attr) {
00406         size_t len = strlen(s) + 1;
00407         <font class="keywordtype">char</font>*  buf;
00408         <font class="keywordflow">if</font> (attr.strBufPos + len &gt; <font class="keyword">sizeof</font>(attr.strBuf)) { 
00409             dbStringValue* sv = 
00410                 (dbStringValue*)<font class="keyword">new</font> <font class="keywordtype">char</font>[offsetof(dbStringValue,str)+len];
00411             sv-&gt;next = attr.tempStrings;
00412             attr.tempStrings = sv;
00413             buf = sv-&gt;str;
00414         } <font class="keywordflow">else</font> { 
00415             buf = attr.strBuf + attr.strBufPos;
00416             attr.strBufPos += len;
00417         }
00418         <font class="keywordflow">return</font> strcpy(buf, s);
00419     }
00420 };
00421     
00422 <font class="preprocessor">#endif</font>
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