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Diffstat (limited to 'libstdc++-v3/src/locale.cc')
| -rw-r--r-- | libstdc++-v3/src/locale.cc | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/libstdc++-v3/src/locale.cc b/libstdc++-v3/src/locale.cc new file mode 100644 index 000000000..09dccf0d7 --- /dev/null +++ b/libstdc++-v3/src/locale.cc @@ -0,0 +1,444 @@ +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, +// 2006, 2007, 2008, 2009, 2010 +// 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/>. + +#include <clocale> +#include <cstring> +#include <cstdlib> // For getenv +#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) + { _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() + { _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() + { + __other._M_impl->_M_add_reference(); + _M_impl->_M_remove_reference(); + _M_impl = __other._M_impl; + return *this; + } + + 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 __GHTREADS + 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) + { + // 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 (_M_caches[__index] != 0) + { + // Some other thread got in first. + delete __cache; + } + else + { + __cache->_M_add_reference(); + _M_caches[__index] = __cache; + } + } + + // locale::id + // Definitions for static const data members of locale::id + _Atomic_word locale::id::_S_refcount; // init'd to 0 by linker + + size_t + locale::id::_M_id() const throw() + { + if (!_M_index) + { + // XXX GLIBCXX_ABI Deprecated +#ifdef _GLIBCXX_LONG_DOUBLE_COMPAT + locale::id *f = 0; +# define _GLIBCXX_SYNC_ID(facet, mangled) \ + if (this == &::mangled) \ + f = &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 + if (f) + _M_index = 1 + f->_M_id(); + else +#endif + _M_index = 1 + __gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, + 1); + } + return _M_index - 1; + } + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace |