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/*
* Copyright (c) 1999 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: verireal.cc,v 1.14 2003/03/07 06:10:13 steve Exp $"
#endif

# include "config.h"

# include "verireal.h"
# include "verinum.h"
# include <stdlib.h>
# include <ctype.h>
# include <iostream>
# include <math.h>
# include <assert.h>

verireal::verireal()
{
      value_ = 0.0;
}

verireal::verireal(const char*txt)
{
      char*tmp = new char[strlen(txt)+1];
      char*cp = tmp;
      for (unsigned idx = 0 ; txt[idx] ; idx += 1) {
if (txt[idx] == '_')
continue;

*cp++ = txt[idx];
      }
      cp[0] = 0;

      value_ = strtod(tmp, 0);
      delete[]tmp;
}

verireal::verireal(long val)
{
      value_ = (double)val;
}

verireal::~verireal()
{
}

long verireal::as_long(int shift) const
{
      double out = value_ * pow(10.0,shift);
      double outf;

      if (out >= 0.0) {
outf = floor(out);
if (out >= (outf + 0.5))
outf += 1.0;
      } else {
outf = ceil(out);
if (out <= (outf - 0.5))
outf -= 1.0;
      }
      return (long) outf;
}

double verireal::as_double() const
{
      return value_;
}

verireal operator* (const verireal&l, const verireal&r)
{
      verireal res;
      res.value_ = l.value_ * r.value_;
      return res;
}

verireal operator/ (const verireal&l, const verireal&r)
{
      verireal res;
      res.value_ = l.value_ / r.value_;
      return res;
}

verireal operator/ (const verireal&l, const verinum&r)
{
      verireal res;
      res.value_ = l.value_ / (double)r.as_long();
      return res;
}

verireal operator% (const verireal&l, const verireal&r)
{
      verireal res;
      assert(0);
      return res;
}

verireal operator% (const verireal&l, const verinum&r)
{
      verireal res;
      assert(0);
      return res;
}

ostream& operator<< (ostream&out, const verireal&v)
{
      out << v.value_;
      return out;
}

/*
* $Log: verireal.cc,v $
* Revision 1.14 2003/03/07 06:10:13 steve
* Use strtod to convert text to doubles.
*
* Revision 1.13 2003/03/05 03:45:01 steve
* Restore verireal constructor to match vvp processing of reals.
*
* Revision 1.11 2003/02/07 06:13:44 steve
* Store real values as native double.
*
* Revision 1.10 2003/02/07 02:48:43 steve
* NetEBDiv handles real value constant expressions.
*
* Revision 1.9 2003/01/26 21:15:59 steve
* Rework expression parsing and elaboration to
* accommodate real/realtime values and expressions.
*
* Revision 1.8 2002/08/12 01:35:01 steve
* conditional ident string using autoconfig.
*
* Revision 1.7 2002/06/15 02:35:49 steve
* Rounding error.
*
* Revision 1.6 2001/11/06 06:11:55 steve
* Support more real arithmetic in delay constants.
*
* Revision 1.5 2001/07/25 03:10:50 steve
* Create a config.h.in file to hold all the config
* junk, and support gcc 3.0. (Stephan Boettcher)
*
* Revision 1.4 2001/07/07 20:20:10 steve
* Pass parameters to system functions.
*
* Revision 1.3 2000/12/10 22:01:36 steve
* Support decimal constants in behavioral delays.
*
* Revision 1.2 2000/02/23 02:56:56 steve
* Macintosh compilers do not support ident.
*
* Revision 1.1 1999/06/15 02:50:02 steve
* Add lexical support for real numbers.
*
*/
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