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FastDb是高效的内存数据库系统

<a name="l00307"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro24">00307</a>     size_t             alignment;
00308 
<a name="l00312"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro25">00312</a>     dbUDTComparator    comparator;
00313 
<a name="l00317"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptorw4">00317</a>     <span class="keyword">enum</span> FieldAttributes { 
00318         ComponentOfArray   = 0x01,
00319         HasArrayComponents = 0x02,
00320         OneToOneMapping    = 0x04,
00321         Updated            = 0x08
00322     };
00323     <span class="keywordtype">int</span>                attr;
00324 
<a name="l00328"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro27">00328</a>     <span class="keywordtype">int</span>                oldDbsType;
<a name="l00332"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro28">00332</a>     <span class="keywordtype">int</span>                oldDbsOffs;
<a name="l00336"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro29">00336</a>     <span class="keywordtype">int</span>                oldDbsSize;
00337 
<a name="l00341"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro30">00341</a>     <a class="code" href="classdbAnyMethodTrampoline.html">dbAnyMethodTrampoline</a>* method;
00342 
00346     void (*arrayAllocator)(<a class="code" href="classdbAnyArray.html">dbAnyArray</a>* array, <span class="keywordtype">void</span>* data, size_t length);
00347     
00348 
00359     size_t calculateRecordSize(byte* base, size_t offs);
00360 
00370     size_t calculateNewRecordSize(byte* base, size_t offs);
00371     
00381     size_t convertRecord(byte* dst, byte* src, size_t offs);
00382 
00393     <span class="keywordtype">int</span>    sizeWithoutOneField(dbFieldDescriptor* field, 
00394                                byte* base, size_t&amp; size);
00395     
00405     size_t copyRecordExceptOneField(dbFieldDescriptor* field, 
00406                                     byte* dst, byte* src, size_t offs); 
00407 
00418     size_t storeRecordFields(byte* dst, byte* src, size_t offs, <span class="keywordtype">bool</span> insert);
00419 
00427     <span class="keywordtype">void</span> markUpdatedFields(byte* dst, byte* src);
00428 
00436     <span class="keywordtype">void</span> fetchRecordFields(byte* dst, byte* src);
00437 
00446     <span class="keywordtype">void</span> adjustReferences(byte* record, size_t base, size_t size, <span class="keywordtype">long</span> shift);
00447 
00453     dbFieldDescriptor* find(<span class="keyword">const</span> <span class="keywordtype">char</span>* name);
00454 
<a name="l00459"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptora10">00459</a>     dbFieldDescriptor* getFirstComponent() { 
00460         <span class="keywordflow">return</span> components;
00461     }
00462 
<a name="l00467"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptora11">00467</a>     dbFieldDescriptor* getNextComponent(dbFieldDescriptor* field) { 
00468         <span class="keywordflow">if</span> (field != NULL) { 
00469             field = field-&gt;<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro0">next</a>;
00470             <span class="keywordflow">if</span> (field == components) { 
00471                 <span class="keywordflow">return</span> NULL;
00472             }
00473         }
00474         <span class="keywordflow">return</span> field;
00475     }
00476         
<a name="l00480"></a><a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptora12">00480</a>     dbFieldDescriptor&amp; operator, (dbFieldDescriptor&amp; field) { 
00481         dbFieldDescriptor* tail = field.<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro1">prev</a>;
00482         tail-&gt;<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro0">next</a> = <span class="keyword">this</span>;
00483         prev-&gt;<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro0">next</a> = &amp;field;
00484         field.<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro1">prev</a> = prev;
00485         prev = tail;
00486         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00487     }
00488 
00489     <span class="keywordtype">void</span>* operator new(size_t size EXTRA_DEBUG_NEW_PARAMS);
00490     <span class="keywordtype">void</span>  operator delete(<span class="keywordtype">void</span>* p EXTRA_DEBUG_NEW_PARAMS);
00491 
00495     dbFieldDescriptor&amp; adjustOffsets(<span class="keywordtype">long</span> offs);
00496 
00506     dbFieldDescriptor(<span class="keywordtype">char</span>* name, <span class="keywordtype">int</span> offs, <span class="keywordtype">int</span> size, <span class="keywordtype">int</span> indexType, 
00507                       <span class="keywordtype">char</span>* inverse = NULL,
00508                       dbFieldDescriptor* components = NULL);
00509 
00514     dbFieldDescriptor(<span class="keywordtype">char</span>* name);
00515 
00519     ~dbFieldDescriptor();
00520 };
00521 
00522 
<a name="l00526"></a><a class="code" href="classdbTableDescriptor.html">00526</a> <span class="keyword">class </span>FASTDB_DLL_ENTRY dbTableDescriptor { 
00527     <span class="keyword">friend</span> <span class="keyword">class </span>dbCompiler;
00528     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbDatabase.html">dbDatabase</a>;
00529     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbTable.html">dbTable</a>;
00530     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbAnyCursor.html">dbAnyCursor</a>;
00531     <span class="keyword">friend</span> <span class="keyword">class </span>dbSubSql;
00532     <span class="keyword">friend</span> <span class="keyword">class </span>dbHashTable;
00533     <span class="keyword">friend</span> <span class="keyword">class </span>dbTtreeNode;
00534     <span class="keyword">friend</span> <span class="keyword">class </span>dbServer;
00535     <span class="keyword">friend</span> <span class="keyword">class </span>dbColumnBinding;
00536     <span class="keyword">friend</span> <span class="keyword">class </span>dbFieldDescriptor;
00537     <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classdbAnyContainer.html">dbAnyContainer</a>;
00538     <span class="keyword">friend</span> <span class="keyword">class </span>dbCLI;
00539     <span class="keyword">friend</span> <span class="keyword">class </span>dbSelection;
00540   <span class="keyword">protected</span>:
<a name="l00544"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp0">00544</a>     dbTableDescriptor*  next;
00545     <span class="keyword">static</span> dbTableDescriptor* chain;
00546 
<a name="l00550"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp1">00550</a>     dbTableDescriptor*  nextDbTable; <span class="comment">// next table in the database</span>
00551 
<a name="l00555"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp2">00555</a>     <span class="keywordtype">char</span>*               name;
00556 
<a name="l00560"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp3">00560</a>     oid_t               tableId;
00561 
<a name="l00565"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp4">00565</a>     dbFieldDescriptor*  columns; 
00566     
<a name="l00570"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp5">00570</a>     dbFieldDescriptor*  hashedFields;
00571 
<a name="l00575"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp6">00575</a>     dbFieldDescriptor*  indexedFields;
00576 
<a name="l00580"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp7">00580</a>     dbFieldDescriptor*  inverseFields;
00581 
<a name="l00585"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp8">00585</a>     dbFieldDescriptor*  firstField;
00586 
<a name="l00590"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp9">00590</a>     dbFieldDescriptor** nextFieldLink;
00591 
<a name="l00595"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp10">00595</a>     <a class="code" href="classdbDatabase.html">dbDatabase</a>*         db;
00596     
<a name="l00600"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp11">00600</a>     <span class="keywordtype">bool</span>                fixedDatabase;
00601 
<a name="l00605"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp12">00605</a>     <span class="keywordtype">bool</span>                isStatic;
00606 
<a name="l00610"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp13">00610</a>     size_t              appSize;
00611 
<a name="l00615"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp14">00615</a>     size_t              fixedSize;
00616 
<a name="l00620"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp15">00620</a>     size_t              nFields;
00621 
<a name="l00625"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp16">00625</a>     size_t              nColumns;
00626 
<a name="l00630"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp17">00630</a>     int4                autoincrementCount;
00631 
00632 
<a name="l00638"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorp18">00638</a>     dbTableDescriptor*  cloneOf;
00639 
00640 
<a name="l00644"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptorx0">00644</a>     <span class="keyword">typedef</span> dbFieldDescriptor* (*describeFunc)();
00645     <a class="code" href="classdbTableDescriptor.html#dbTableDescriptorx0">describeFunc</a>        describeComponentsFunc;
00646 
00650     dbTableDescriptor*  clone();
00651 
00655     size_t              totalNamesLength();
00656 
00668     <span class="keywordtype">int</span> calculateFieldsAttributes(dbFieldDescriptor* fieldsList, 
00669                                   <span class="keywordtype">char</span> <span class="keyword">const</span>* prefix, <span class="keywordtype">int</span> offs, 
00670                                   <span class="keywordtype">int</span> indexMask, <span class="keywordtype">int</span>&amp; attr);
00671 
00680     dbFieldDescriptor* buildFieldsList(<a class="code" href="classdbTable.html">dbTable</a>* table, <span class="keywordtype">char</span> <span class="keyword">const</span>* prefix, <span class="keywordtype">int</span> prefixLen, <span class="keywordtype">int</span>&amp; attr);
00681 
00682   <span class="keyword">public</span>:
<a name="l00686"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptors0">00686</a>     <span class="keyword">static</span> <span class="keywordtype">int</span> initialAutoincrementCount;
00687 
<a name="l00691"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptora0">00691</a>     dbTableDescriptor* getNextTable() { 
00692         <span class="keywordflow">return</span> nextDbTable;
00693     }
00694 
00698     dbFieldDescriptor* findSymbol(<span class="keywordtype">char</span> <span class="keyword">const</span>* name);
00699 
00700 
00704     dbFieldDescriptor* find(<span class="keywordtype">char</span> <span class="keyword">const</span>* name);
00705 
00706 
<a name="l00711"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptora3">00711</a>     dbFieldDescriptor* getFirstField() { 
00712         <span class="keywordflow">return</span> columns;
00713     }
00714 
<a name="l00720"></a><a class="code" href="classdbTableDescriptor.html#dbTableDescriptora4">00720</a>     dbFieldDescriptor* getNextField(dbFieldDescriptor* field) { 
00721         <span class="keywordflow">if</span> (field != NULL) { 
00722             field = field-&gt;<a class="code" href="classdbFieldDescriptor.html#dbFieldDescriptoro0">next</a>;
00723             <span class="keywordflow">if</span> (field == columns) { 
00724                 <span class="keywordflow">return</span> NULL;