    // ------------------------------- //
    // -------- Start of File -------- //
    // ------------------------------- //
    // ----------------------------------------------------------- //
    // C++ Source Code File Name: testprog.cpp
    // Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
    // Produced By: DataReel Software Development Team
    // File Creation Date: 02/04/1997
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2025 DataReel Software Development
    // ----------------------------------------------------------- //
    // ------------- Program Description and Details ------------- //
    // ----------------------------------------------------------- //
    /*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
    USA

    Simple demo of the gxDatabase class.
    */
    // ----------------------------------------------------------- //
    #include "gxdlcode.h"

    #if defined (__USE_ANSI_CPP__) // Use the ANSI Standard C++ library
    #include <iostream>
    #include <iomanip>
    using namespace std; // Use unqualified names for Standard C++ library
    #else // Use the old iostream library by default
    #include <iostream.h>
    #include <iomanip.h>
    #endif // __USE_ANSI_CPP__

    #include <string.h>
    #include "gxdbase.h"
    #include "gxfloat.h"
    #include "gxdstats.h"
    #include "ustring.h"

    const int name_length = 16;

    class DatabaseObject
    {
    public:
      DatabaseObject() { name[0] = 0; oid = (gxINT32)0, cid = (gxFLOAT64)0; }
      DatabaseObject(const char *s, long i, double d);

    public:
      void DisplayObject();

    public: // Platform independent data members
      char name[name_length]; // Fixed string type
      gxINT32 oid;            // Integer type
      gxFLOAT64 cid;          // Floating point type
    };

    DatabaseObject::DatabaseObject(const char *s, long i, double d)
    {
      for(int j = 0; j < name_length; j++) name[j] = 0; // Clear the name string
      strcpy(name, s);
      oid = i;
      cid = d;
    }

    void DatabaseObject::DisplayObject()
    {
      cout << "Database object name: " << name << "\n";
      cout << "Database object OID:  " << oid << "\n";
      cout.setf(ios::showpoint | ios::fixed);
      cout.precision(3);
      cout << "Database object CID:  " << cid << "\n";
    }

    void PausePrg()
    {
      cout << "\n";
      cout << "Press enter to continue..." << "\n";
      cin.get();
    }

    int main(int argv, char **argc)
    {
      const char *fname = "simple.gxd"; // File name of this database
      char rev_letter = gxDatabaseRevisionLetter; // Set the default rev letter
      if(argv == 2) { // Set a specified revision letter
        rev_letter = *argc[1];
        if(rev_letter == '0') rev_letter = '\0';
        // Valid rev letters are:
        // Rev 0
        // Rev 'A' or 'a'
        // Rev 'B' or 'b'
        // Rev 'C' or 'c'
        // Rev 'D' or 'd'
        // Rev 'E' or 'e'
        // NOTE: The gxDatabase class will set invalid revision letters
        // to the version set by the gxDatabaseRevisionLetter constant.
      }

      // Using pointer semantics to prevent copying
      gxDatabase *f = new gxDatabase;
      if(!f) {
        cout << "Could not allocate memory for file pointer" << "\n";
        return 1;
      }

      cout << "\n";
      cout << "Simple demo of the file manager class." << "\n";

      cout << "Creating new file..." << "\n";
      f->Create(fname, (FAU_t)0, rev_letter);
      if(CheckError(f) != 0) {
        delete f;
        return 1;
      }

      // Echo the file version and revision letter
      EchoDatabaseVersion(f);

      PausePrg();
      DatabaseStats(f);
      PausePrg();

      cout << "Adding object to database file..." << "\n";
      cout << "Size of object = " << sizeof(DatabaseObject) << "\n";

      // Allocate a block to store the object
      FAU_t addr = f->Alloc(sizeof(DatabaseObject));
      if(CheckError(f) != 0) {
        delete f;
        return 1;
      }

      // Construct the datbase object
      DatabaseObject ob("Mouse", (long)addr, 5000.101);

      // Write the objects data
      f->Write(&ob, sizeof(DatabaseObject));
      UString intbuf;
      if(CheckError(f) != 0) {
        delete f;
        return 1;
      }
      intbuf << clear << (FAU_t)(addr - f->BlockHeaderSize());
      cout << "Block Address: " << intbuf.c_str()  << "\n";
      intbuf << clear << (FAU_t)addr;
      cout << "Writing object to FAU: " << intbuf.c_str() << "\n";

      PausePrg();
      BlockStats(f, addr);
      PausePrg();

      DatabaseObject buf;
      cout << "Reading the first object from the database file..." << "\n";
      addr = f->FindFirstBlock();

      // Read the objects data
      if(addr) {
        f->Read(&buf, sizeof(buf), (FAU_t)(addr+f->BlockHeaderSize()));
        if(CheckError(f) != 0) {
          delete f;
          return 1;
        }
        buf.DisplayObject();
      }

      PausePrg();
      DatabaseStats(f);
      PausePrg();

      cout << "Exiting..." << "\n";

      // Close the file and check for any errors
      f->Close();
      if(CheckError(f) != 0) {
        delete f;
        return 1;
      }

      // Delete the object
      delete f; // The destructor call will close the file if it is open

      return 0;
    }
    // ----------------------------------------------------------- //
    // ------------------------------- //
    // --------- End of File --------- //
    // ------------------------------- //