141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
#ifndef __verireal_H
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#define __verireal_H
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/*
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* Copyright (c) 1999-2004 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: verireal.h,v 1.16 2007/04/07 04:46:19 steve Exp $"
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#endif
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# include "config.h"
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#ifdef HAVE_IOSFWD
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# include <iosfwd>
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#else
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class ostream;
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#endif
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using namespace std;
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class verinum;
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/*
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* This class holds a floating point decimal number. The number is
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* stored as an integer mantissa and a power of 10. The mantissa is an
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* integer so that decimal numbers in the source (which are decimal)
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* can be stored exactly.
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*/
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class verireal {
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friend ostream& operator<< (ostream&, const verireal&);
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friend verireal operator+ (const verireal&, const verireal&);
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friend verireal operator- (const verireal&, const verireal&);
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friend verireal operator* (const verireal&, const verireal&);
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friend verireal operator/ (const verireal&, const verireal&);
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friend verireal operator/ (const verireal&, const verinum&);
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friend verireal operator% (const verireal&, const verireal&);
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friend verireal operator% (const verireal&, const verinum&);
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friend verireal pow(const verireal&, const verireal&);
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// Unary minus.
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friend verireal operator- (const verireal&);
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public:
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explicit verireal();
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explicit verireal(const char*text);
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explicit verireal(long val);
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explicit verireal(double val);
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~verireal();
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/* Return the value of the floating point number as an
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integer, rounded as needed. The shift is the power of 10 to
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multiply the value before calculating the result. So for
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example if the value is 2.5 and shift == 1, the result
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is 25. */
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long as_long(int shift =0) const;
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int64_t as_long64(int shift =0) const;
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double as_double() const;
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private:
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double value_;
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};
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extern ostream& operator<< (ostream&, const verireal&);
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extern verireal operator* (const verireal&, const verireal&);
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extern verireal operator/ (const verireal&, const verireal&);
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extern verireal operator/ (const verireal&, const verinum&);
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extern verireal operator% (const verireal&, const verireal&);
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extern verireal operator% (const verireal&, const verinum&);
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extern verireal pow(const verireal&, const verireal&);
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extern verireal operator- (const verireal&);
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/*
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* $Log: verireal.h,v $
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* Revision 1.16 2007/04/07 04:46:19 steve
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* Handle evaluate of addition of real valued constants.
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*
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* Revision 1.15 2007/02/02 04:33:01 steve
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* Use inttypes.h instead of stdint.h for portability.
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*
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* Revision 1.14 2006/10/03 05:06:00 steve
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* Support real valued specify delays, properly scaled.
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*
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* Revision 1.13 2006/08/08 05:11:37 steve
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* Handle 64bit delay constants.
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*
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* Revision 1.12 2006/07/31 03:50:18 steve
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* Add support for power in constant expressions.
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*
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* Revision 1.11 2005/06/14 19:13:43 steve
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* gcc3/4 compile errors.
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*
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* Revision 1.10 2004/06/04 23:33:51 steve
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* Add unary minus as operator supported by verireal.
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*
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* Revision 1.9 2003/02/07 06:13:44 steve
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* Store real values as native double.
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*
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* Revision 1.8 2003/02/07 02:48:43 steve
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* NetEBDiv handles real value constant expressions.
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*
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* Revision 1.7 2003/01/26 21:15:59 steve
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* Rework expression parsing and elaboration to
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* accommodate real/realtime values and expressions.
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*
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* Revision 1.6 2002/08/12 01:35:01 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.5 2001/11/06 06:11:55 steve
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* Support more real arithmetic in delay constants.
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*
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* Revision 1.4 2001/01/16 02:44:18 steve
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* Use the iosfwd header if available.
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*
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* Revision 1.3 2000/12/10 22:01:36 steve
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* Support decimal constants in behavioral delays.
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*
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* Revision 1.2 2000/02/23 02:56:56 steve
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* Macintosh compilers do not support ident.
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*
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* Revision 1.1 1999/06/15 02:50:02 steve
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* Add lexical support for real numbers.
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*
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*/
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#endif
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