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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
*/
#if !defined(WINNT)
#ident "$Id: verireal.cc,v 1.1 1999/06/15 02:50:02 steve Exp $"
#endif

# include "verireal.h"
# include <ctype.h>
# include <assert.h>

verireal::verireal()
{
      sign_ = false;
      mant_ = 0;
      exp10_ = 0;
}

verireal::verireal(const char*txt)
{
      mant_ = 0;
      sign_ = false;
      exp10_ = 0;

      const char*ptr = txt;
      for ( ; *ptr ; ptr += 1) {
if (*ptr == '.') break;
if (*ptr == 'e') break;
if (*ptr == 'E') break;
if (*ptr == '_') continue;

assert(isdigit(*ptr));

mant_ *= 10;
mant_ += *ptr - '0';
      }

      if (*ptr == '.') {
ptr += 1;
for ( ; *ptr ; ptr += 1) {
if (*ptr == 'e') break;
if (*ptr == 'E') break;
if (*ptr == '_') continue;

assert(isdigit(*ptr));

mant_ *= 10;
mant_ += *ptr - '0';
exp10_ -= 1;
}
      }

      if ((*ptr == 'e') || (*ptr == 'E')) {
ptr += 1;
long tmp = 0;
bool sflag = false;
if (*ptr == '+') {ptr += 1; sflag = false;}
if (*ptr == '-') {ptr += 1; sflag = true;}

for ( ; *ptr ; ptr += 1) {
if (*ptr == '_') continue;
assert(isdigit(*ptr));
tmp *= 10;
tmp += *ptr - '0';
}

exp10_ += sflag? -tmp : +tmp;
      }

      assert(*ptr == 0);
}


verireal::~verireal()
{
}

/*
* $Log: verireal.cc,v $
* Revision 1.1 1999/06/15 02:50:02 steve
* Add lexical support for real numbers.
*
*/

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