// ------------------------------- // // -------- Start of File -------- // // ------------------------------- // // ----------------------------------------------------------- // // C++ Source Code File Name: testprog.cpp // Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC // Produced By: Doug Gaer // File Creation Date: 02/04/1997 // Date Last Modified: 08/11/2000 // Copyright (c) 1997, 2000 Douglas M. Gaer // ----------------------------------------------------------- // // ------------- 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 vbDatabase linear navigation test. */ // ----------------------------------------------------------- // #include <iostream.h> #include <iomanip.h> #include <string.h> #include "vbdbase.h" #include "vbfloat.h" #include "vbstat32.h" const int name_length = 16; class DatabaseObject { public: DatabaseObject() { name[0] = 0; oid = (vbINT32)0, cid = (vbFLOAT64)0; } DatabaseObject(const char *s, long i, double d); public: friend void *operator new(size_t n, char *s, int i, double d, vbDatabase *f) { void *ptr = new DatabaseObject(s, i, d); f->Write(ptr, n, f->Alloc(n)); return ptr; } public: // Platform independent data members char name[name_length]; // Fixed string type vbINT32 oid; // Integer type vbFLOAT64 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 PausePrg() { cout << endl; cout << "Press enter to continue..." << endl; cin.get(); } int main() // Simple demo of how to use the file manager class. { vbDatabase *f = new vbDatabase; const char *fname = "prevnext.vbd"; cout << endl; cout << "Simple navigation demo." << endl; cout << "Testing vb find functions..." << endl; const int num_to_add = 5; if(!vbDatabase::Exists(fname)) { cout << "Creating new file..." << endl; f->Create(fname); if(CheckError(f) != 0) return 1; cout << "Adding " << num_to_add << " objects..." << endl; for(long i = 0; i < num_to_add; i++) new("Mouse", i, 2000.101, f) DatabaseObject; if(CheckError(f) != 0) return 1; } else { cout << "Opening existing file..." << endl; f->Open(fname); if(CheckError(f) != 0) return 1; } PausePrg(); VBDStats(f); PausePrg(); cout << "Walking through the file finding all blocks..." << endl; FAU block_address = 0; while(1) { block_address = f->FindFirstVB(block_address); if(block_address == FAU(0)) break; cout << "Found block at file address: " << block_address << endl; block_address++; // Offset the block address } PausePrg(); cout << "Finding all blocks in reverse order..." << endl; block_address = f->GetEOF(); while(1) { block_address = f->FindPrevVB(block_address); if(block_address == FAU(0)) break; cout << "Found block at file address: " << block_address << endl; block_address++; // Offset the block address } PausePrg(); cout << "Walking through the file finding every object..." << endl; FAU object_address = 0; while(1) { object_address = f->FindFirstObject(object_address); if(object_address == FAU(0)) break; cout << "Found object at file address: " << object_address << endl; object_address++; // Offset the block address } PausePrg(); cout << "Finding every object in reverse order..." << endl; object_address = f->GetEOF(); while(1) { object_address = f->FindPrevObject(object_address); if(object_address == FAU(0)) break; cout << "Found object at file address: " << object_address << endl; object_address++; // Offset the block address } cout << endl; cout << "Exiting..." << endl; f->Close(); if(CheckError(f) != 0) return 1; delete f; return 0; } // ----------------------------------------------------------- // // ------------------------------- // // --------- End of File --------- // // ------------------------------- //