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Commit d154f927 by Paolo Carlini
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[multiple changes] 

2011-02-28  Paolo Carlini  <paolo.carlini@oracle.com>

	* testsuite/20_util/ratio/comparisons/comp3.cc: New.

2011-02-28  Marc Glisse  <marc.glisse@normalesup.org>

	PR libstdc++/42622
	* include/std/ratio (ratio_less): Reimplement to never overflow.
	* testsuite/20_util/ratio/comparisons/comp2.cc: Extend.

From-SVN: r170567
parent f61c6f34
Showing with 128 additions and 6 deletions
libstdc++-v3/ChangeLog
2011-02-28 Paolo Carlini <paolo.carlini@oracle.com>
* testsuite/20_util/ratio/comparisons/comp3.cc: New.
2011-02-28 Marc Glisse <marc.glisse@normalesup.org>
PR libstdc++/42622
* include/std/ratio (ratio_less): Reimplement to never overflow.
* testsuite/20_util/ratio/comparisons/comp2.cc: Extend.
2011-02-24 Benjamin Kosnik <bkoz@redhat.com>
* testsuite/18_support/type_info/fundamental.cc: New.
......
libstdc++-v3/include/std/ratio
// ratio -*- C++ -*-
// Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
......@@ -274,9 +274,42 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: integral_constant<bool, !ratio_equal<_R1, _R2>::value>
{ };
template<typename _R1>
// 0 <= _Ri < 1
template<typename _R1, typename _R2>
struct __ratio_less_impl_2;
// _Ri > 0
template<typename _R1, typename _R2, intmax_t __q1 = _R1::num / _R1::den,
intmax_t __q2 = _R2::num / _R2::den, bool __eq = (__q1 == __q2)>
struct __ratio_less_impl_1
: integral_constant<bool, _R1::num < _R1::den>
: __ratio_less_impl_2<ratio<_R1::num % _R1::den, _R1::den>,
ratio<_R2::num % _R2::den, _R2::den> >::type
{ };
template<typename _R1, typename _R2, intmax_t __q1, intmax_t __q2>
struct __ratio_less_impl_1<_R1, _R2, __q1, __q2, false>
: integral_constant<bool, (__q1 < __q2) >
{ };
template<typename _R1, typename _R2>
struct __ratio_less_impl_2
: __ratio_less_impl_1<ratio<_R2::den, _R2::num>,
ratio<_R1::den, _R1::num> >::type
{ };
template<intmax_t __d1, typename _R2>
struct __ratio_less_impl_2<ratio<0, __d1>, _R2>
: integral_constant<bool, true>
{ };
template<typename _R1, intmax_t __d2>
struct __ratio_less_impl_2<_R1, ratio<0, __d2> >
: integral_constant<bool, false>
{ };
template<intmax_t __d1, intmax_t __d2>
struct __ratio_less_impl_2<ratio<0, __d1>, ratio<0, __d2> >
: integral_constant<bool, false>
{ };
template<typename _R1, typename _R2,
......@@ -286,7 +319,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
bool = (__static_sign<_R1::num>::value == -1
&& __static_sign<_R2::num>::value == -1)>
struct __ratio_less_impl
: __ratio_less_impl_1<typename ratio_divide<_R1, _R2>::type>::type
: __ratio_less_impl_1<_R1, _R2>::type
{ };
template<typename _R1, typename _R2>
......@@ -296,7 +329,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _R1, typename _R2>
struct __ratio_less_impl<_R1, _R2, false, true>
: __ratio_less_impl_1<typename ratio_divide<_R2, _R1>::type>::type
: __ratio_less_impl_1<ratio<-_R2::num, _R2::den>,
ratio<-_R1::num, _R1::den> >::type
{ };
/// ratio_less
......
libstdc++-v3/testsuite/20_util/ratio/comparisons/comp2.cc
// { dg-options "-std=gnu++0x" }
// { dg-require-cstdint "" }
// Copyright (C) 2008, 2009, 2010 Free Software Foundation
// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
......@@ -48,6 +48,9 @@ test01()
VERIFY( (std::ratio_less<std::ratio<-M, M - 1>,
std::ratio<-M, M - 2>>::value == 0) );
VERIFY( (std::ratio_less<std::ratio<M - 2, M - 1>,
std::ratio<M - 1, M>>::value == 1) );
}
int main()
......
libstdc++-v3/testsuite/20_util/ratio/comparisons/comp3.cc 0 → 100644
// { dg-options "-std=gnu++0x" }
// { dg-require-cstdint "" }
// 2011-02-28 Paolo Carlini <paolo.carlini@oracle.com>
// Copyright (C) 2011 Free Software Foundation
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library 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 library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <ratio>
#include <testsuite_hooks.h>
void
test01()
{
bool test __attribute__((unused)) = true;
VERIFY( (std::ratio_less<std::ratio<59, 29131>,
std::ratio<59, 29129>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<4733, 13>,
std::ratio<4751, 13>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<25703, 25717>,
std::ratio<25733, 25741>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<631, 769>,
std::ratio<673, 773>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<8353, 16903>,
std::ratio<17891, 32099>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<2311, 18701>,
std::ratio<18457, 19571>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<60, 29132>,
std::ratio<60, 29130>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<4734, 14>,
std::ratio<4752, 14>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<25704, 25718>,
std::ratio<25732, 25742>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<632, 770>,
std::ratio<674, 774>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<8352, 16904>,
std::ratio<17892, 32100>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<2312, 18702>,
std::ratio<18458, 19572>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<58, 29130>,
std::ratio<58, 29128>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<4732, 12>,
std::ratio<4750, 12>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<25702, 25716>,
std::ratio<25734, 25740>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<630, 768>,
std::ratio<672, 772>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<8354, 16902>,
std::ratio<17890, 32102>>::value == 1) );
VERIFY( (std::ratio_less<std::ratio<2310, 18700>,
std::ratio<18456, 19570>>::value == 1) );
}
int main()
{
test01();
return 0;
}
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