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/******************************************************************************
* Copyright (c) 2000-2016 Ericsson Telecom AB
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Balasko, Jeno
* Bibo, Zoltan
* Delic, Adam
* Forstner, Matyas
* Raduly, Csaba
* Szabo, Janos Zoltan – initial implementation
*
******************************************************************************/
#ifndef _Common_Real_HH
#define _Common_Real_HH
#include "string.hh"
#include <math.h>
// older versions of gcc do not have numeric_limits<double> or it is wrong
// and they do not have constants defined by C99 standard
#ifdef INFINITY
static const double REAL_INFINITY = INFINITY;
#else
#include <float.h>
static const double REAL_INFINITY = (DBL_MAX*DBL_MAX);
#endif
#ifdef NAN
static const double REAL_NAN = NAN;
#else
static const double REAL_NAN = (REAL_INFINITY-REAL_INFINITY);
#endif
namespace Common {
class Location;
/**
* \defgroup Real Real type and related functions
*
* Real type is used to represent those real/float values which will
* be used in TITAN run-time environment, in the compiler.
*
* @{
*/
/** Real typedef */
typedef double Real;
/** +/- infinity and not_a_number are non-numeric float values in ttcn-3,
these special values cannot be used in some places */
bool isSpecialFloatValue(const Real& r);
/**
* Converts the Common::Real value to string.
*
* The returned string looks like this:
*
* <pre>
(
(
([\-][1-9]\.(([0-9]+[1-9])|0))
|
([\-]0\.([0-9]+[1-9]))
)
"e"
(([\-][1-9][0-9]*)|0)
)
|
(0\.0e0)
|
"INF"
|
"-INF"
* </pre>
*/
string Real2string(const Real& r);
/** Returns the C++ equivalent of value r */
string Real2code(const Real& r);
/**
* Converts the string value to Common::Real.
*/
Real string2Real(const char *s, const Location& loc);
inline Real string2Real(const string& s, const Location& loc)
{ return string2Real(s.c_str(), loc); }
/** @} end of Real group */
} // namespace Common
#endif // _Common_Real_HH
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