FloatingPointExample

    // ------------------------------- //
    // -------- 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: 09/05/1997
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2016 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

    This is a test program for the FLOAT64 class.
    */
    // ----------------------------------------------------------- //
    #include "gxdlcode.h"

    #if defined (__USE_NATIVE_FLOAT_TYPES__)
    int main() { return 0; } // No test for native types
    #else

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

    #include "gxfloat.h"
    #include "dfileb.h"

    #if defined (__MSVC__)
    #pragma warning(disable:4244) // Function template instantiation warning
    #endif

    const __DPFLOAT__ DPFLOATPositiveLimit = 1.7E+308; // (15 digit precision)
    const __DPFLOAT__ DPFLOATNegitiveLimit = 1.7E-308; // (15 digit precision)

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

    void ClearInputStream(istream &s)
    // Used to clear istream
    {
      char c;
      s.clear();
      while(s.get(c) && c != '\n') { ; }
    }

    void FWrite(char *fname)
    {
      gxFLOAT64 aa = 3.141592653589793; // Arc cosine of -1 equals pi
      cout.precision(15);  // Show 15 places after the decimal point
      cout.setf(ios::fixed | ios::right); // Normal FP notation right justified
      cout << "Writing a gxFLOAT64 value " << aa << " to a file..." << "\n";

      DiskFileB stream(fname, DiskFileB::df_READWRITE, DiskFileB::df_CREATE);
      if(!stream) {
        cout << "Could not open " << fname << " file" << "\n";
        return;
      }
      stream.df_Write(&aa, sizeof(gxFLOAT64));
      cout << "Wrote " << stream.df_pcount() << " bytes" << "\n";
      stream.df_Close();
    }

    void FRead(char *fname)
    {
      gxFLOAT64 bb = 0;
      cout.precision(15);  // Show 15 places after the decimal point
      cout.setf(ios::fixed | ios::right); // Normal FP notation right justified
      cout << "Reading back gxFLOAT64 value from the file..." << "\n";

      DiskFileB stream(fname);
      if(!stream) {
        cout << "Could not open " << fname << " file" << "\n";
        return;
      }
      stream.df_Read(&bb, sizeof(gxFLOAT64));
      cout << "Read " << stream.df_gcount() << " bytes" << "\n";
      stream.df_Close();
      cout << "Value read from file = " << bb << "\n";
    }

    template<class TYPEX, class TYPEY>
    inline void OperatorTest(TYPEX x, TYPEY y)
    {
      char *tf[2] = {"FALSE", "TRUE"};
      cout << "\n";
      cout << "Value x = " << x << ", Value y = " << y << "\n";
      TYPEX z;
      cout << x << " += " << y << " = "; z = x; z += y; cout << z << "\n";
      cout << x << " -= " << y << " = "; z = x; z -= y; cout << z << "\n";
      cout << x << " *= " << y << " = "; z = x; z *= y; cout << z << "\n";
      cout << x << " /= " << y << " = "; z = x; z /= y; cout << z << "\n";
      cout << x << " * " << y << " = " ; z = (x * y); cout << z << "\n";
      cout << x << " / " << y << " = " ; z = (x / y); cout << z << "\n";
      cout << x << " + " << y << " = " ; z = (x + y); cout << z << "\n";
      cout << x << " - " << y << " = " ; z = (x - y); cout << z << "\n";
      cout << x << " == " << y << " = " << tf[(x == y)] << "\n";
      cout << x << " != " << y << " = " << tf[(x != y)] << "\n";
      cout << x << " <= " << y << " = " << tf[(x <= y)] << "\n";
      cout << x << " >= " << y << " = " << tf[(x >= y)] << "\n";
      cout << x << " < " << y << " = " << tf[(x < y)] << "\n";
      cout << x << " > " << y << " = " << tf[(x > y)] << "\n";
      cout << x << "++ = "; z = x; z++; cout << z << "\n";
      cout << x << "-- = "; z = x; z--; cout << z << "\n";
      cout << "++" << x << " = "; z = x; ++z; cout << z << "\n";
      cout << "--" << x << " = "; z = x; --z; cout << z << "\n";
    }

    int main()
    {
      gxFLOAT64 a = DPFLOATPositiveLimit;
      cout << "gxFLOAT64 positive limit = " << a << "\n";

      gxFLOAT64 b(DPFLOATNegitiveLimit);
      cout << "gxFLOAT64 negitive limit = " << b << "\n";

      PausePrg();

      cout << "Testing gxFLOAT64 copy constructor..." << "\n";
      gxFLOAT64 c(a);
      cout << c << "\n";

      cout << "\n";
      cout << "Testing gxFLOAT64 assignment operator..." << "\n";
      gxFLOAT64 d;
      d = a;
      cout << d << "\n";

      PausePrg();

      // Reading and writing a gxFLOAT64 value to a file
      char fname[255] = "testf64.out";
      FILE *tmp; // Temporary file pointer
      tmp = ::fopen(fname, "rb");

      if(tmp) FRead(fname); else FWrite(fname);

      PausePrg();

      cout.precision(10);  // Show 10 places after the decimal point
      cout.setf(ios::fixed | ios::right); // Normal FP notation right justified
      cout << "Testing overloaded operators (gxFLOAT64, gxFLOAT64)..." << "\n";
      __DPFLOAT__ buf1, buf2, af, bf;

      cout << "Enter first floating point value: ";
      cin >> buf1;
      if(cin) {
        a = buf1;
        af = buf1;
        cout << "Enter second floating point value: ";
        cin >> buf2;
      }
      else {
        cout << "Input stream broken. Exiting..." << "\n";
        return 0;
      }
      if(cin) {
        b = buf2;
        bf = buf2;
      }
      else {
        cout << "Input stream broken. Exiting..." << "\n";
        return 0;
      }

      ClearInputStream(cin);

      cout << "\n";

      OperatorTest(a, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __DPFLOAT__)..." << "\n";
      OperatorTest(a, bf);

      PausePrg();

      cout << "Testing overloaded operators (__DPFLOAT__, gxFLOAT64)..." << "\n";
      OperatorTest(af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __LWORD__)..." << "\n";
      OperatorTest(a, (__LWORD__)bf);

      PausePrg();

      cout << "Testing overloaded operators (__LWORD__, gxFLOAT64)..." << "\n";
      OperatorTest((__LWORD__)af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __WORD__)..." << "\n";
      OperatorTest(a, (__WORD__)bf);

      PausePrg();

      cout << "Testing overloaded operators (__WORD__, gxFLOAT64)..." << "\n";
      OperatorTest((__WORD__)af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __SWORD__)..." << "\n";
      OperatorTest(a, (__SWORD__)bf);

      PausePrg();

      cout << "Testing overloaded operators (__SWORD__, gxFLOAT64)..." << "\n";
      OperatorTest((__SWORD__)af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __UWORD__)..." << "\n";
      OperatorTest(a, (__UWORD__)bf);

      PausePrg();

      cout << "Testing overloaded operators (__UWORD__, gxFLOAT64)..." << "\n";
      OperatorTest((__UWORD__)af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __USWORD__)..." << "\n";
      OperatorTest(a, (__USWORD__)bf);

      PausePrg();

      cout << "Testing overloaded operators (__USWORD__, gxFLOAT64)..." << "\n";
      OperatorTest((__USWORD__)af, b);

      PausePrg();

      cout << "Testing overloaded operators (gxFLOAT64, __SBYTE__)..." << "\n";
      OperatorTest(a, 'B');

      PausePrg();

      cout << "Testing overloaded operators (__SBYTE__, gxFLOAT64)..." << "\n";
      OperatorTest('A', b);

      return 0;
    }

    #if defined (__MSVC__)
    #pragma warning(default:4244) // Restore previous warning
    #endif

    #endif // __USE_NATIVE_FLOAT_TYPES__
    // ----------------------------------------------------------- //
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    // ------------------------------- //