cdsa/cdsa_utilities/db++.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // dbm++ - generic C++ layer interface to [n]dbm
  21 //
  22 #ifndef _H_DBMPP
  23 #define _H_DBMPP
  24
  25 #include <Security/utilities.h>
  26 #include <Security/cssmdata.h>
  27 #include <Security/unix++.h>
  28 #include <string>
  29 #include <db.h>
  30
  31
  32 namespace Security {
  33 namespace UnixPlusPlus {
  34
  35
  36 class UnixDb : public FileDesc {
  37 public:
  38         UnixDb();
  39         UnixDb(const char *path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  40         UnixDb(const std::string &path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  41
  42         virtual ~UnixDb();
  43
  44         void open(const char *path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  45         void open(const std::string &path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  46         void close();
  47
  48         bool get(const CssmData &key, CssmData &value, int flags = 0) const;
  49         bool get(const CssmData &key, CssmOwnedData &value, int flags = 0) const;
  50         bool put(const CssmData &key, const CssmData &value, int flags = 0);
  51         void erase(const CssmData &key, int flags = 0);
  52         void flush(int flags = 0);
  53
  54         bool next(CssmData &key, CssmData &value, int flags = R_NEXT) const;
  55         bool first(CssmData &key, CssmData &value) const
  56                 { return next(key, value, R_FIRST); }
  57
  58         operator bool () const
  59                 { return mDb; }
  60
  61 public:
  62         struct Data : public PodWrapper<Data, DBT> {
  63                 template <class T>
  64                 Data(const T &src)              { DBT::data = src.data(); DBT::size = src.length(); }
  65
  66                 Data() { }
  67                 Data(void *data, size_t length) { DBT::data = data; DBT::size = length; }
  68                 Data(const DBT &dat)    { DBT::data = dat.data; DBT::size = dat.size; }
  69
  70                 void *data() const              { return DBT::data; }
  71                 size_t length() const   { return size; }
  72                 operator bool () const  { return DBT::data != NULL; }
  73                 operator CssmData () const { return CssmData(data(), length()); }
  74         };
  75
  76 private:
  77         DB *mDb;
  78 };
  79
  80
  81 }       // end namespace UnixPlusPlus
  82 }       // end namespace Security
  83
  84
  85 #endif //_H_DBMPP