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// Copyright (C) 1997-2022 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/>.
#define _GLIBCXX_USE_CXX11_ABI 1
#include <clocale>
#include <cstring>
#include <cctype>
#include <cwctype> // For towupper, etc.
#include <locale>
#include <ext/concurrence.h>
namespace
{
__gnu_cxx::__mutex&
get_locale_cache_mutex()
{
static __gnu_cxx::__mutex locale_cache_mutex;
return locale_cache_mutex;
}
} // anonymous namespace
// XXX GLIBCXX_ABI Deprecated
#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
# define _GLIBCXX_LOC_ID(mangled) extern std::locale::id mangled
_GLIBCXX_LOC_ID (_ZNSt7num_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt9money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE);
# ifdef _GLIBCXX_USE_WCHAR_T
_GLIBCXX_LOC_ID (_ZNSt7num_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt7num_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt9money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_LOC_ID (_ZNSt9money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE);
# endif
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
// Definitions for static const data members of locale.
const locale::category locale::none;
const locale::category locale::ctype;
const locale::category locale::numeric;
const locale::category locale::collate;
const locale::category locale::time;
const locale::category locale::monetary;
const locale::category locale::messages;
const locale::category locale::all;
// These are no longer exported.
locale::_Impl* locale::_S_classic;
locale::_Impl* locale::_S_global;
#ifdef __GTHREADS
__gthread_once_t locale::_S_once = __GTHREAD_ONCE_INIT;
#endif
locale::locale(const locale& __other) throw()
: _M_impl(__other._M_impl)
{
if (_M_impl != _S_classic)
_M_impl->_M_add_reference();
}
// This is used to initialize global and classic locales, and
// assumes that the _Impl objects are constructed correctly.
// The lack of a reference increment is intentional.
locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
{ }
locale::~locale() throw()
{
if (_M_impl != _S_classic)
_M_impl->_M_remove_reference();
}
bool
locale::operator==(const locale& __rhs) const throw()
{
// Deal first with the common cases, fast to process: refcopies,
// unnamed (i.e., !_M_names[0]), "simple" (!_M_names[1] => all the
// categories same name, i.e., _M_names[0]). Otherwise fall back
// to the general locale::name().
bool __ret;
if (_M_impl == __rhs._M_impl)
__ret = true;
else if (!_M_impl->_M_names[0] || !__rhs._M_impl->_M_names[0]
|| std::strcmp(_M_impl->_M_names[0],
__rhs._M_impl->_M_names[0]) != 0)
__ret = false;
else if (!_M_impl->_M_names[1] && !__rhs._M_impl->_M_names[1])
__ret = true;
else
__ret = this->name() == __rhs.name();
return __ret;
}
const locale&
locale::operator=(const locale& __other) throw()
{
if (__other._M_impl != _S_classic)
__other._M_impl->_M_add_reference();
if (_M_impl != _S_classic)
_M_impl->_M_remove_reference();
_M_impl = __other._M_impl;
return *this;
}
_GLIBCXX_DEFAULT_ABI_TAG
string
locale::name() const
{
string __ret;
if (!_M_impl->_M_names[0])
__ret = '*';
else if (_M_impl->_M_check_same_name())
__ret = _M_impl->_M_names[0];
else
{
__ret.reserve(128);
__ret += _S_categories[0];
__ret += '=';
__ret += _M_impl->_M_names[0];
for (size_t __i = 1; __i < _S_categories_size; ++__i)
{
__ret += ';';
__ret += _S_categories[__i];
__ret += '=';
__ret += _M_impl->_M_names[__i];
}
}
return __ret;
}
locale::category
locale::_S_normalize_category(category __cat)
{
int __ret = 0;
if (__cat == none || ((__cat & all) && !(__cat & ~all)))
__ret = __cat;
else
{
// NB: May be a C-style "LC_ALL" category; convert.
switch (__cat)
{
case LC_COLLATE:
__ret = collate;
break;
case LC_CTYPE:
__ret = ctype;
break;
case LC_MONETARY:
__ret = monetary;
break;
case LC_NUMERIC:
__ret = numeric;
break;
case LC_TIME:
__ret = time;
break;
#ifdef _GLIBCXX_HAVE_LC_MESSAGES
case LC_MESSAGES:
__ret = messages;
break;
#endif
case LC_ALL:
__ret = all;
break;
default:
__throw_runtime_error(__N("locale::_S_normalize_category "
"category not found"));
}
}
return __ret;
}
// locale::facet
__c_locale locale::facet::_S_c_locale;
const char locale::facet::_S_c_name[2] = "C";
#ifdef __GTHREADS
__gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT;
#endif
void
locale::facet::_S_initialize_once()
{
// Initialize the underlying locale model.
_S_create_c_locale(_S_c_locale, _S_c_name);
}
__c_locale
locale::facet::_S_get_c_locale()
{
#ifdef __GTHREADS
if (__gthread_active_p())
__gthread_once(&_S_once, _S_initialize_once);
else
#endif
{
if (!_S_c_locale)
_S_initialize_once();
}
return _S_c_locale;
}
const char*
locale::facet::_S_get_c_name() throw()
{ return _S_c_name; }
locale::facet::
~facet() { }
// locale::_Impl
locale::_Impl::
~_Impl() throw()
{
if (_M_facets)
for (size_t __i = 0; __i < _M_facets_size; ++__i)
if (_M_facets[__i])
_M_facets[__i]->_M_remove_reference();
delete [] _M_facets;
if (_M_caches)
for (size_t __i = 0; __i < _M_facets_size; ++__i)
if (_M_caches[__i])
_M_caches[__i]->_M_remove_reference();
delete [] _M_caches;
if (_M_names)
for (size_t __i = 0; __i < _S_categories_size; ++__i)
delete [] _M_names[__i];
delete [] _M_names;
}
// Clone existing _Impl object.
locale::_Impl::
_Impl(const _Impl& __imp, size_t __refs)
: _M_refcount(__refs), _M_facets(0), _M_facets_size(__imp._M_facets_size),
_M_caches(0), _M_names(0)
{
__try
{
_M_facets = new const facet*[_M_facets_size];
for (size_t __i = 0; __i < _M_facets_size; ++__i)
{
_M_facets[__i] = __imp._M_facets[__i];
if (_M_facets[__i])
_M_facets[__i]->_M_add_reference();
}
_M_caches = new const facet*[_M_facets_size];
for (size_t __j = 0; __j < _M_facets_size; ++__j)
{
_M_caches[__j] = __imp._M_caches[__j];
if (_M_caches[__j])
_M_caches[__j]->_M_add_reference();
}
_M_names = new char*[_S_categories_size];
for (size_t __k = 0; __k < _S_categories_size; ++__k)
_M_names[__k] = 0;
// Name the categories.
for (size_t __l = 0; (__l < _S_categories_size
&& __imp._M_names[__l]); ++__l)
{
const size_t __len = std::strlen(__imp._M_names[__l]) + 1;
_M_names[__l] = new char[__len];
std::memcpy(_M_names[__l], __imp._M_names[__l], __len);
}
}
__catch(...)
{
this->~_Impl();
__throw_exception_again;
}
}
void
locale::_Impl::
_M_replace_category(const _Impl* __imp,
const locale::id* const* __idpp)
{
for (; *__idpp; ++__idpp)
_M_replace_facet(__imp, *__idpp);
}
void
locale::_Impl::
_M_replace_facet(const _Impl* __imp, const locale::id* __idp)
{
size_t __index = __idp->_M_id();
if ((__index > (__imp->_M_facets_size - 1))
|| !__imp->_M_facets[__index])
__throw_runtime_error(__N("locale::_Impl::_M_replace_facet"));
_M_install_facet(__idp, __imp->_M_facets[__index]);
}
void
locale::_Impl::
_M_install_facet(const locale::id* __idp, const facet* __fp)
{
if (__fp)
{
size_t __index = __idp->_M_id();
// Check size of facet vector to ensure adequate room.
if (__index > _M_facets_size - 1)
{
const size_t __new_size = __index + 4;
// New facet array.
const facet** __oldf = _M_facets;
const facet** __newf;
__newf = new const facet*[__new_size];
for (size_t __i = 0; __i < _M_facets_size; ++__i)
__newf[__i] = _M_facets[__i];
for (size_t __l = _M_facets_size; __l < __new_size; ++__l)
__newf[__l] = 0;
// New cache array.
const facet** __oldc = _M_caches;
const facet** __newc;
__try
{
__newc = new const facet*[__new_size];
}
__catch(...)
{
delete [] __newf;
__throw_exception_again;
}
for (size_t __j = 0; __j < _M_facets_size; ++__j)
__newc[__j] = _M_caches[__j];
for (size_t __k = _M_facets_size; __k < __new_size; ++__k)
__newc[__k] = 0;
_M_facets_size = __new_size;
_M_facets = __newf;
_M_caches = __newc;
delete [] __oldf;
delete [] __oldc;
}
__fp->_M_add_reference();
const facet*& __fpr = _M_facets[__index];
if (__fpr)
{
#if _GLIBCXX_USE_DUAL_ABI
// If this is a twinned facet replace its twin with a shim.
for (const id* const* p = _S_twinned_facets; *p != 0; p += 2)
{
if (p[0]->_M_id() == __index)
{
// replacing the old ABI facet, also replace new ABI twin
const facet*& __fpr2 = _M_facets[p[1]->_M_id()];
if (__fpr2)
{
const facet* __fp2 = __fp->_M_sso_shim(p[1]);
__fp2->_M_add_reference();
__fpr2->_M_remove_reference();
__fpr2 = __fp2;
}
break;
}
else if (p[1]->_M_id() == __index)
{
// replacing the new ABI facet, also replace old ABI twin
const facet*& __fpr2 = _M_facets[p[0]->_M_id()];
if (__fpr2)
{
const facet* __fp2 = __fp->_M_cow_shim(p[0]);
__fp2->_M_add_reference();
__fpr2->_M_remove_reference();
__fpr2 = __fp2;
}
break;
}
}
#endif
// Replacing an existing facet. Order matters.
__fpr->_M_remove_reference();
__fpr = __fp;
}
else
{
// Installing a newly created facet into an empty
// _M_facets container, say a newly-constructed,
// swanky-fresh _Impl.
_M_facets[__index] = __fp;
}
// Ideally, it would be nice to only remove the caches that
// are now incorrect. However, some of the caches depend on
// multiple facets, and we only know about one facet
// here. It's no great loss: the first use of the new facet
// will create a new, correctly cached facet anyway.
for (size_t __i = 0; __i < _M_facets_size; ++__i)
{
const facet* __cpr = _M_caches[__i];
if (__cpr)
{
__cpr->_M_remove_reference();
_M_caches[__i] = 0;
}
}
}
}
void
locale::_Impl::
_M_install_cache(const facet* __cache, size_t __index)
{
__gnu_cxx::__scoped_lock sentry(get_locale_cache_mutex());
#if _GLIBCXX_USE_DUAL_ABI
// If this cache is for one of the facets that is instantiated twice,
// for old and new std::string ABI, install it in both slots.
size_t __index2 = -1;
for (const id* const* p = _S_twinned_facets; *p != 0; p += 2)
{
if (p[0]->_M_id() == __index)
{
__index2 = p[1]->_M_id();
break;
}
else if (p[1]->_M_id() == __index)
{
__index2 = __index;
__index = p[0]->_M_id();
break;
}
}
#endif
if (_M_caches[__index] != 0)
{
// Some other thread got in first.
delete __cache;
}
else
{
__cache->_M_add_reference();
_M_caches[__index] = __cache;
#if _GLIBCXX_USE_DUAL_ABI
if (__index2 != size_t(-1))
{
__cache->_M_add_reference();
_M_caches[__index2] = __cache;
}
#endif
}
}
// locale::id
// Definitions for static const data members of locale::id
_Atomic_word locale::id::_S_refcount; // init'd to 0 by linker
// XXX GLIBCXX_ABI Deprecated
#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
namespace {
inline locale::id*
find_ldbl_sync_facet(const locale::id* __idp)
{
# define _GLIBCXX_SYNC_ID(facet, mangled) \
if (__idp == &::mangled) \
return &facet::id
_GLIBCXX_SYNC_ID (num_get<char>, _ZNSt7num_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_SYNC_ID (num_put<char>, _ZNSt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_SYNC_ID (money_get<char>, _ZNSt9money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE);
_GLIBCXX_SYNC_ID (money_put<char>, _ZNSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE);
# ifdef _GLIBCXX_USE_WCHAR_T
_GLIBCXX_SYNC_ID (num_get<wchar_t>, _ZNSt7num_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_SYNC_ID (num_put<wchar_t>, _ZNSt7num_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_SYNC_ID (money_get<wchar_t>, _ZNSt9money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE);
_GLIBCXX_SYNC_ID (money_put<wchar_t>, _ZNSt9money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE);
# endif
return 0;
}
} // namespace
#endif
size_t
locale::id::_M_id() const throw()
{
if (!_M_index)
{
// XXX GLIBCXX_ABI Deprecated
#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
if (locale::id* f = find_ldbl_sync_facet(this))
{
const size_t sync_id = f->_M_id();
_M_index = 1 + sync_id;
return sync_id;
}
#endif
#ifdef __GTHREADS
if (!__gnu_cxx::__is_single_threaded())
{
if (__atomic_always_lock_free(sizeof(_M_index), &_M_index))
{
const _Atomic_word next
= 1 + __gnu_cxx::__exchange_and_add(&_S_refcount, 1);
size_t expected = 0;
__atomic_compare_exchange_n(&_M_index, &expected, next,
/* weak = */ false,
/* success = */ __ATOMIC_ACQ_REL,
/* failure = */ __ATOMIC_ACQUIRE);
}
else
{
static __gnu_cxx::__mutex m;
__gnu_cxx::__scoped_lock l(m);
if (!_M_index)
_M_index = ++_S_refcount;
}
}
else
#endif
_M_index = ++_S_refcount; // single-threaded case
}
return _M_index - 1;
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace