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32 
33 #pragma once
34 
35 #include "dbCore.h"
36 #include "dbId.h"
37 #include "odb.h"
38 
39 namespace odb {
40 
41 class _dbDatabase;
42 class dbIStream;
43 class dbOStream;
44 class dbDiff;
45 
46 //
47 // dbName - This class is used to cache strings that are repeated frequently.
48 // For example, propery names are repeated frequently.
49 //
50 // Net and Instances names are unique and should not use the dbName cache.
51 //
52 class _dbName : public _dbObject
53 {
54  public:
55   // PERSISTANT-MEMBERS
56   char* _name;
57   dbId<_dbName> _next_entry;
58   uint _ref_cnt;
59 
60   _dbName(_dbDatabase*);
61   _dbName(_dbDatabase*, const _dbName& n);
62   ~_dbName();
63 
64   bool operator==(const _dbName& rhs) const;
65   bool operator!=(const _dbName& rhs) const { return !operator==(rhs); }
66   bool operator<(const _dbName& rhs) const;
67   void differences(dbDiff& diff, const char* field, const _dbName& rhs) const;
68   void out(dbDiff& diff, char side, const char* field) const;
69 };
70 
71 dbOStream& operator<<(dbOStream& stream, const _dbName& n);
72 dbIStream& operator>>(dbIStream& stream, _dbName& n);
73 
74 }  // namespace odb
75