libsecurity_cdsa_utilities/lib/db++.h

   1 /*
   2  * Copyright (c) 2003-2004,2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 //
  26 // dbm++ - generic C++ layer interface to [n]dbm
  27 //
  28 #ifndef _H_DBMPP
  29 #define _H_DBMPP
  30
  31 #include <security_utilities/utilities.h>
  32 #include <security_cdsa_utilities/cssmdata.h>
  33 #include <security_utilities/unix++.h>
  34 #include <string>
  35 #include <db.h>
  36
  37
  38 namespace Security {
  39 namespace UnixPlusPlus {
  40
  41
  42 class UnixDb : public FileDesc {
  43 public:
  44         UnixDb();
  45         UnixDb(const char *path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  46         UnixDb(const std::string &path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  47
  48         virtual ~UnixDb();
  49
  50         void open(const char *path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  51         void open(const std::string &path, int flags = O_RDWR, int mode = 0666, DBTYPE type = DB_HASH);
  52         void close();
  53
  54         bool get(const CssmData &key, CssmData &value, int flags = 0) const;
  55         bool get(const CssmData &key, CssmOwnedData &value, int flags = 0) const;
  56         bool put(const CssmData &key, const CssmData &value, int flags = 0);
  57         void erase(const CssmData &key, int flags = 0);
  58         void flush(int flags = 0);
  59
  60         bool next(CssmData &key, CssmData &value, int flags = R_NEXT) const;
  61         bool first(CssmData &key, CssmData &value) const
  62                 { return next(key, value, R_FIRST); }
  63
  64         operator bool () const
  65                 { return mDb; }
  66
  67 public:
  68         struct Data : public PodWrapper<Data, DBT> {
  69                 template <class T>
  70                 Data(const T &src)              { DBT::data = src.data(); DBT::size = src.length(); }
  71
  72                 Data() { }
  73                 Data(void *data, size_t length) { DBT::data = data; DBT::size = length; }
  74                 Data(const DBT &dat)    { DBT::data = dat.data; DBT::size = dat.size; }
  75
  76                 void *data() const              { return DBT::data; }
  77                 size_t length() const   { return size; }
  78                 operator bool () const  { return DBT::data != NULL; }
  79                 operator CssmData () const { return CssmData(data(), length()); }
  80         };
  81
  82 private:
  83         DB *mDb;
  84 };
  85
  86
  87 }       // end namespace UnixPlusPlus
  88 }       // end namespace Security
  89
  90
  91 #endif //_H_DBMPP