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//
// FPEnvironment_DEC.cpp
//
// Library: Foundation
// Package: Core
// Module: FPEnvironment
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
//
// _XOPEN_SOURCE disables the ieee fp functions
// in <math.h>, therefore we undefine it for this file.
//
#undef _XOPEN_SOURCE
#include <math.h>
#include <fp.h>
#include <fp_class.h>
#if defined(__VMS)
#error #include <starlet.h>
#endif
#include "Poco/FPEnvironment_DEC.h"
namespace Poco {
FPEnvironmentImpl::FPEnvironmentImpl()
{
#if defined(__VMS)
#pragma pointer_size save
#pragma pointer_size 32
struct _ieee env;
sys$ieee_set_fp_control(0, 0, &env);
#pragma pointer_size restore
_env = env;
#else
_env = ieee_get_fp_control();
#endif
}
FPEnvironmentImpl::FPEnvironmentImpl(const FPEnvironmentImpl& env)
{
_env = env._env;
}
FPEnvironmentImpl::~FPEnvironmentImpl()
{
#if defined(__VMS)
#pragma pointer_size save
#pragma pointer_size 32
struct _ieee mask;
mask.ieee$q_flags = 0xFFFFFFFFFFFFFFFF;
struct _ieee env = _env;
sys$ieee_set_fp_control(&mask, &env, 0);
#pragma pointer_size restore
#else
ieee_set_fp_control(_env);
#endif
}
FPEnvironmentImpl& FPEnvironmentImpl::operator = (const FPEnvironmentImpl& env)
{
_env = env._env;
return *this;
}
bool FPEnvironmentImpl::isInfiniteImpl(float value)
{
int cls = fp_classf(value);
return cls == FP_POS_INF || cls == FP_NEG_INF;
}
bool FPEnvironmentImpl::isInfiniteImpl(double value)
{
int cls = fp_class(value);
return cls == FP_POS_INF || cls == FP_NEG_INF;
}
bool FPEnvironmentImpl::isInfiniteImpl(long double value)
{
int cls = fp_classl(value);
return cls == FP_POS_INF || cls == FP_NEG_INF;
}
bool FPEnvironmentImpl::isNaNImpl(float value)
{
return isnanf(value) != 0;
}
bool FPEnvironmentImpl::isNaNImpl(double value)
{
return isnan(value) != 0;
}
bool FPEnvironmentImpl::isNaNImpl(long double value)
{
return isnanl(value) != 0;
}
float FPEnvironmentImpl::copySignImpl(float target, float source)
{
return copysignf(target, source);
}
double FPEnvironmentImpl::copySignImpl(double target, double source)
{
return copysign(target, source);
}
long double FPEnvironmentImpl::copySignImpl(long double target, long double source)
{
return copysignl(target, source);
}
void FPEnvironmentImpl::keepCurrentImpl()
{
#if defined(__VMS)
#pragma pointer_size save
#pragma pointer_size 32
struct _ieee env;
sys$ieee_set_fp_control(0, 0, &env);
#pragma pointer_size restore
_env = env;
#else
ieee_set_fp_control(_env);
#endif
}
void FPEnvironmentImpl::clearFlagsImpl()
{
#if defined(__VMS)
#pragma pointer_size save
#pragma pointer_size 32
struct _ieee mask;
mask.ieee$q_flags = 0xFFFFFFFFFFFFFFFF;
struct _ieee clr;
clr.ieee$q_flags = 0;
sys$ieee_set_fp_control(&mask, &clr, 0);
#pragma pointer_size restore
#else
ieee_set_fp_control(0);
#endif
}
bool FPEnvironmentImpl::isFlagImpl(FlagImpl flag)
{
#if defined(__VMS)
#pragma pointer_size save
#pragma pointer_size 32
struct _ieee flags;
sys$ieee_set_fp_control(0, 0, &flags);
return (flags.ieee$q_flags & flag) != 0;
#pragma pointer_size restore
#else
return (ieee_get_fp_control() & flag) != 0;
#endif
}
void FPEnvironmentImpl::setRoundingModeImpl(RoundingModeImpl mode)
{
// not supported
}
FPEnvironmentImpl::RoundingModeImpl FPEnvironmentImpl::getRoundingModeImpl()
{
// not supported
return FPEnvironmentImpl::RoundingModeImpl(0);
}
} // namespace Poco
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