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// Wrapper for underlying C-language localization -*- C++ -*-
// Copyright (C) 2001-2022 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
// 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
//
// ISO C++ 14882: 22.8 Standard locale categories.
//
// Written by Benjamin Kosnik <bkoz@redhat.com>
#include <cerrno> // For errno
#include <cmath> // For isinf, finite, finitef, fabs
#include <cstdlib> // For strof, strtold
#include <cstring>
#include <cstdio>
#include <locale>
#include <limits>
#ifdef _GLIBCXX_HAVE_IEEEFP_H
#include <ieeefp.h>
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace
{
struct _Save_errno
{
_Save_errno() : _M_errno(errno) { errno = 0; }
~_Save_errno() { if (errno == 0) errno = _M_errno; }
int _M_errno;
};
// calls setlocale(LC_ALL, "C") and returns a string containing the old
// locale name. Caller must delete[] the string. Returns NULL on error.
const char*
__set_C_locale()
{
char* __old = setlocale(LC_ALL, 0);
const size_t __len = strlen(__old) + 1;
char* __sav = new(nothrow) char[__len];
if (__sav)
{
memcpy(__sav, __old, __len);
setlocale(LC_ALL, "C");
}
return __sav;
}
}
template<>
void
__convert_to_v(const char* __s, float& __v, ios_base::iostate& __err,
const __c_locale&) throw()
{
// Assumes __s formatted for "C" locale.
const char* __sav = __set_C_locale();
if (!__sav)
{
__err = ios_base::failbit;
return;
}
char* __sanity;
bool __overflow = false;
#if !__FLT_HAS_INFINITY__
const _Save_errno __save_errno;
#endif
#ifdef _GLIBCXX_HAVE_STRTOF
__v = strtof(__s, &__sanity);
#else
double __d = strtod(__s, &__sanity);
__v = static_cast<float>(__d);
#ifdef _GLIBCXX_HAVE_FINITEF
if (!finitef (__v))
__overflow = true;
#elif defined (_GLIBCXX_HAVE_FINITE)
if (!finite (static_cast<double> (__v)))
__overflow = true;
#elif defined (_GLIBCXX_HAVE_ISINF)
if (isinf (static_cast<double> (__v)))
__overflow = true;
#else
if (fabs(__d) > numeric_limits<float>::max())
__overflow = true;
#endif
#endif // _GLIBCXX_HAVE_STRTOF
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 23. Num_get overflow result.
if (__sanity == __s || *__sanity != '\0')
{
__v = 0.0f;
__err = ios_base::failbit;
}
else if (__overflow
#if __FLT_HAS_INFINITY__
|| __v == numeric_limits<float>::infinity()
|| __v == -numeric_limits<float>::infinity()
#else
|| ((__v > 1.0f || __v < -1.0f) && errno == ERANGE)
#endif
)
{
if (__v > 0.0f)
__v = numeric_limits<float>::max();
else
__v = -numeric_limits<float>::max();
__err = ios_base::failbit;
}
setlocale(LC_ALL, __sav);
delete [] __sav;
}
template<>
void
__convert_to_v(const char* __s, double& __v, ios_base::iostate& __err,
const __c_locale&) throw()
{
// Assumes __s formatted for "C" locale.
const char* __sav = __set_C_locale();
if (!__sav)
{
__err = ios_base::failbit;
return;
}
char* __sanity;
#if !__DBL_HAS_INFINITY__
const _Save_errno __save_errno;
#endif
__v = strtod(__s, &__sanity);
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 23. Num_get overflow result.
if (__sanity == __s || *__sanity != '\0')
{
__v = 0.0;
__err = ios_base::failbit;
}
else if (
#if __DBL_HAS_INFINITY__
__v == numeric_limits<double>::infinity()
|| __v == -numeric_limits<double>::infinity())
#else
(__v > 1.0 || __v < -1.0) && errno == ERANGE)
#endif
{
if (__v > 0.0)
__v = numeric_limits<double>::max();
else
__v = -numeric_limits<double>::max();
__err = ios_base::failbit;
}
setlocale(LC_ALL, __sav);
delete [] __sav;
}
template<>
void
__convert_to_v(const char* __s, long double& __v,
ios_base::iostate& __err, const __c_locale&) throw()
{
// Assumes __s formatted for "C" locale.
const char* __sav = __set_C_locale();
if (!__sav)
{
__err = ios_base::failbit;
return;
}
#if !__LDBL_HAS_INFINITY__
const _Save_errno __save_errno;
#endif
#if defined(_GLIBCXX_HAVE_STRTOLD) && !defined(_GLIBCXX_HAVE_BROKEN_STRTOLD)
char* __sanity;
__v = strtold(__s, &__sanity);
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 23. Num_get overflow result.
if (__sanity == __s || *__sanity != '\0')
#else
typedef char_traits<char>::int_type int_type;
int __p = sscanf(__s, "%Lf", &__v);
if (!__p || static_cast<int_type>(__p) == char_traits<char>::eof())
#endif
{
__v = 0.0l;
__err = ios_base::failbit;
}
else if (
#if __LDBL_HAS_INFINITY__
__v == numeric_limits<long double>::infinity()
|| __v == -numeric_limits<long double>::infinity())
#else
(__v > 1.0l || __v < -1.0l) && errno == ERANGE)
#endif
{
if (__v > 0.0l)
__v = numeric_limits<long double>::max();
else
__v = -numeric_limits<long double>::max();
__err = ios_base::failbit;
}
setlocale(LC_ALL, __sav);
delete [] __sav;
}
void
locale::facet::_S_create_c_locale(__c_locale& __cloc, const char* __s,
__c_locale)
{
// Currently, the generic model only supports the "C" locale.
// See http://gcc.gnu.org/ml/libstdc++/2003-02/msg00345.html
__cloc = 0;
if (strcmp(__s, "C"))
__throw_runtime_error(__N("locale::facet::_S_create_c_locale "
"name not valid"));
}
void
locale::facet::_S_destroy_c_locale(__c_locale& __cloc)
{ __cloc = 0; }
__c_locale
locale::facet::_S_clone_c_locale(__c_locale&) throw()
{ return __c_locale(); }
__c_locale
locale::facet::_S_lc_ctype_c_locale(__c_locale, const char*)
{ return __c_locale(); }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
const char* const category_names[6 + _GLIBCXX_NUM_CATEGORIES] =
{
"LC_CTYPE",
"LC_NUMERIC",
"LC_TIME",
"LC_COLLATE",
"LC_MONETARY",
"LC_MESSAGES"
};
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
const char* const* const locale::_S_categories = __gnu_cxx::category_names;
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
// XXX GLIBCXX_ABI Deprecated
#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
#define _GLIBCXX_LDBL_COMPAT(dbl, ldbl) \
extern "C" void ldbl (void) __attribute__ ((alias (#dbl)))
_GLIBCXX_LDBL_COMPAT(_ZSt14__convert_to_vIdEvPKcRT_RSt12_Ios_IostateRKPi, _ZSt14__convert_to_vIeEvPKcRT_RSt12_Ios_IostateRKPi);
#endif // _GLIBCXX_LONG_DOUBLE_COMPAT
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