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/*
*
* Copyright (C) 2014-2024, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: ofstd
*
* Author: Jan Schlamelcher
*
* Purpose: unit test for OFnumeric_limits
*
*/
#include "dcmtk/config/osconfig.h" /* make sure OS specific configuration is included first */
#define OFTEST_OFSTD_ONLY
#include "dcmtk/ofstd/oftest.h"
#include "dcmtk/ofstd/ofdiag.h"
#include "dcmtk/ofstd/oflimits.h"
#include "dcmtk/ofstd/ofstd.h"
#include "dcmtk/ofstd/oftraits.h"
#include "dcmtk/ofstd/ofmath.h" // for isinf and isnan
// On some platforms, such as OpenIndiana, isinf is defined as a macro,
// and that interferes with the OFMath function of the same name.
#ifdef isinf
#undef isinf
#endif
#include DCMTK_DIAGNOSTIC_PUSH
#include DCMTK_DIAGNOSTIC_IGNORE_OVERFLOW
#include DCMTK_DIAGNOSTIC_IGNORE_IMPLICIT_CONVERSION
#include DCMTK_DIAGNOSTIC_IGNORE_UNSIGNED_UNARY_MINUS
template<typename T>
static void checkMinMax()
{
// we need to declare some variables as volatile to prevent the
// Clang compiler from optimizing away everything, leading to a test failure:wq
volatile T max_( OFnumeric_limits<T>::max() );
volatile T lowest;
if (OFnumeric_limits<T>::is_integer) lowest = OFnumeric_limits<T>::min(); else lowest = -OFnumeric_limits<T>::max();
volatile T max_plus_one = max_ + 1;
volatile T lowest_minus_one = lowest - 1;
OFCHECK
(
OFnumeric_limits<T>::max() >= max_plus_one ||
( OFnumeric_limits<T>::has_infinity && OFMath::isinf( max_plus_one ) )
);
OFCHECK
(
lowest <= lowest_minus_one ||
( OFnumeric_limits<T>::has_infinity && OFMath::isinf( lowest_minus_one ) )
);
}
#include DCMTK_DIAGNOSTIC_POP
template<typename T>
static OFTypename OFenable_if<OFnumeric_limits<T>::has_quiet_NaN>::type checkNaN()
{
(OFMath::isnan)( OFnumeric_limits<T>::quiet_NaN() );
}
template<typename T>
static OFTypename OFenable_if<!OFnumeric_limits<T>::has_quiet_NaN>::type checkNaN()
{
}
template<typename T>
static OFTypename OFenable_if<OFnumeric_limits<T>::has_infinity>::type checkInfinity()
{
(OFMath::isinf)( OFnumeric_limits<T>::infinity() );
}
template<typename T>
static OFTypename OFenable_if<!OFnumeric_limits<T>::has_infinity>::type checkInfinity()
{
}
#include DCMTK_DIAGNOSTIC_PUSH
#include DCMTK_DIAGNOSTIC_IGNORE_OVERFLOW
template<typename T>
static void checkLimits()
{
checkMinMax<T>();
checkNaN<T>();
checkInfinity<T>();
// Only test overflow property if 'is_modulo' expands to OFTrue, since OFFalse may
// also mean 'undefined'.
if( OFnumeric_limits<T>::is_modulo )
OFCHECK( OFstatic_cast( T, OFnumeric_limits<T>::max() + 1 ) == OFnumeric_limits<T>::min() );
}
#include DCMTK_DIAGNOSTIC_POP
OFTEST(ofstd_limits)
{
checkLimits<char>();
checkLimits<signed char>();
checkLimits<unsigned char>();
checkLimits<signed short>();
checkLimits<unsigned short>();
checkLimits<signed int>();
checkLimits<unsigned int>();
checkLimits<signed long>();
checkLimits<unsigned long>();
checkLimits<float>();
checkLimits<double>();
}
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