src/Device/Driver/Volkslogger/dbbconv.h

   1 /***********************************************************************
   2 **
   3 **   dbbconv.h
   4 **
   5 **   This file is part of libkfrgcs.
   6 **
   7 ************************************************************************
   8 **
   9 **   Copyright (c):  2002 by Garrecht Ingenieurgesellschaft
  10 **
  11 **   This file is distributed under the terms of the General Public
  12 **   Licence. See the file COPYING for more information.
  13 **
  14 **   $Id$
  15 **
  16 ***********************************************************************/
  17
  18 #ifndef DBBCONV_H
  19 #define DBBCONV_H
  20
  21 #include "Database.hpp"
  22
  23 #include <stdint.h>
  24 #include <stddef.h>
  25
  26 class DBB {
  27 public:
  28   static constexpr size_t DBBBeg = 0x0000;
  29   static constexpr size_t DBB_SIZE = 0x3000;
  30   static constexpr size_t DBBEnd = DBBBeg + DBB_SIZE;
  31   static constexpr size_t FrmBeg = 0x3000;
  32   static constexpr size_t FRM_SIZE = 0x1000;
  33   static constexpr size_t FrmEnd = FrmBeg + FRM_SIZE;
  34   static constexpr size_t SIZE = DBB_SIZE + FRM_SIZE;
  35
  36   size_t dbcursor;
  37   size_t fdfcursor;
  38   struct HEADER {
  39     unsigned dsanzahl;
  40     unsigned dslaenge, keylaenge;
  41     unsigned dsfirst, dslast;
  42   };
  43   HEADER header[8];
  44 public:
  45   uint8_t buffer[SIZE];
  46
  47   /**
  48    * Konstruktor: leeren Datenbank-Block erzeugen.
  49    */
  50   DBB();
  51
  52   void *GetBlock(size_t offset=0) {
  53     return buffer + DBBBeg + offset;
  54   }
  55
  56   const void *GetBlock(size_t offset=0) const {
  57     return buffer + DBBBeg + offset;
  58   }
  59
  60   void *GetFDF(size_t offset=0) {
  61     return buffer + FrmBeg + offset;
  62   }
  63
  64   const void *GetFDF(size_t offset=0) const {
  65     return buffer + FrmBeg + offset;
  66   }
  67
  68 protected:
  69   Volkslogger::TableHeader *GetHeader(unsigned i) {
  70     Volkslogger::TableHeader *h = (Volkslogger::TableHeader *)GetBlock();
  71     return &h[i];
  72   }
  73
  74   const Volkslogger::TableHeader *GetHeader(unsigned i) const {
  75     const Volkslogger::TableHeader *h =
  76       (const Volkslogger::TableHeader *)GetBlock();
  77     return &h[i];
  78   }
  79
  80 public:
  81   /**
  82    * Generate Header-Structure from DBB-File.
  83    */
  84   void open_dbb();
  85
  86   /**
  87    * Update header of specified table (kennung) of the database and
  88    * close the table (it can't be extended anymore).
  89    */
  90   void close_db(int kennung);
  91
  92   void add_ds(int kennung, const void *quelle);
  93
  94   /**
  95    * Add a FDF entry.
  96    *
  97    * @return a writeable pointer of the specified size or nullptr if
  98    * the buffer is full
  99    */
 100   void *AddFDF(uint8_t id, size_t size);
 101
 102   void add_fdf(int feldkennung, size_t feldlaenge, const void *quelle);
 103
 104   /**
 105    * Add a FDF entry with the specified string value (convert to upper
 106    * case).
 107    */
 108   void AddFDFStringUpper(uint8_t id, const char *value);
 109
 110   /**
 111    * Find an actual record of specified type(id) in the declaration
 112    * memory and return it's position in the memory array.
 113    */
 114   int fdf_findfield(uint8_t id) const;
 115 };
 116
 117 #endif