--- /dev/null
+// Locale support -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2008, 2009
+// 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/>.
+
+/** @file locale_classes.h
+ * This is an internal header file, included by other library headers.
+ * You should not attempt to use it directly.
+ */
+
+//
+// ISO C++ 14882: 22.1 Locales
+//
+
+#ifndef _LOCALE_CLASSES_H
+#define _LOCALE_CLASSES_H 1
+
+#pragma GCC system_header
+
+#include <bits/localefwd.h>
+#include <string>
+#include <ext/atomicity.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+ // 22.1.1 Class locale
+ /**
+ * @brief Container class for localization functionality.
+ *
+ * The locale class is first a class wrapper for C library locales. It is
+ * also an extensible container for user-defined localization. A locale is
+ * a collection of facets that implement various localization features such
+ * as money, time, and number printing.
+ *
+ * Constructing C++ locales does not change the C library locale.
+ *
+ * This library supports efficient construction and copying of locales
+ * through a reference counting implementation of the locale class.
+ */
+ class locale
+ {
+ public:
+ // Types:
+ /// Definition of locale::category.
+ typedef int category;
+
+ // Forward decls and friends:
+ class facet;
+ class id;
+ class _Impl;
+
+ friend class facet;
+ friend class _Impl;
+
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw();
+
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+
+ template<typename _Cache>
+ friend struct __use_cache;
+
+ //@{
+ /**
+ * @brief Category values.
+ *
+ * The standard category values are none, ctype, numeric, collate, time,
+ * monetary, and messages. They form a bitmask that supports union and
+ * intersection. The category all is the union of these values.
+ *
+ * NB: Order must match _S_facet_categories definition in locale.cc
+ */
+ static const category none = 0;
+ static const category ctype = 1L << 0;
+ static const category numeric = 1L << 1;
+ static const category collate = 1L << 2;
+ static const category time = 1L << 3;
+ static const category monetary = 1L << 4;
+ static const category messages = 1L << 5;
+ static const category all = (ctype | numeric | collate |
+ time | monetary | messages);
+ //@}
+
+ // Construct/copy/destroy:
+
+ /**
+ * @brief Default constructor.
+ *
+ * Constructs a copy of the global locale. If no locale has been
+ * explicitly set, this is the "C" locale.
+ */
+ locale() throw();
+
+ /**
+ * @brief Copy constructor.
+ *
+ * Constructs a copy of @a other.
+ *
+ * @param other The locale to copy.
+ */
+ locale(const locale& __other) throw();
+
+ /**
+ * @brief Named locale constructor.
+ *
+ * Constructs a copy of the named C library locale.
+ *
+ * @param s Name of the locale to construct.
+ * @throw std::runtime_error if s is null or an undefined locale.
+ */
+ explicit
+ locale(const char* __s);
+
+ /**
+ * @brief Construct locale with facets from another locale.
+ *
+ * Constructs a copy of the locale @a base. The facets specified by @a
+ * cat are replaced with those from the locale named by @a s. If base is
+ * named, this locale instance will also be named.
+ *
+ * @param base The locale to copy.
+ * @param s Name of the locale to use facets from.
+ * @param cat Set of categories defining the facets to use from s.
+ * @throw std::runtime_error if s is null or an undefined locale.
+ */
+ locale(const locale& __base, const char* __s, category __cat);
+
+ /**
+ * @brief Construct locale with facets from another locale.
+ *
+ * Constructs a copy of the locale @a base. The facets specified by @a
+ * cat are replaced with those from the locale @a add. If @a base and @a
+ * add are named, this locale instance will also be named.
+ *
+ * @param base The locale to copy.
+ * @param add The locale to use facets from.
+ * @param cat Set of categories defining the facets to use from add.
+ */
+ locale(const locale& __base, const locale& __add, category __cat);
+
+ /**
+ * @brief Construct locale with another facet.
+ *
+ * Constructs a copy of the locale @a other. The facet @f is added to
+ * @other, replacing an existing facet of type Facet if there is one. If
+ * @f is null, this locale is a copy of @a other.
+ *
+ * @param other The locale to copy.
+ * @param f The facet to add in.
+ */
+ template<typename _Facet>
+ locale(const locale& __other, _Facet* __f);
+
+ /// Locale destructor.
+ ~locale() throw();
+
+ /**
+ * @brief Assignment operator.
+ *
+ * Set this locale to be a copy of @a other.
+ *
+ * @param other The locale to copy.
+ * @return A reference to this locale.
+ */
+ const locale&
+ operator=(const locale& __other) throw();
+
+ /**
+ * @brief Construct locale with another facet.
+ *
+ * Constructs and returns a new copy of this locale. Adds or replaces an
+ * existing facet of type Facet from the locale @a other into the new
+ * locale.
+ *
+ * @param Facet The facet type to copy from other
+ * @param other The locale to copy from.
+ * @return Newly constructed locale.
+ * @throw std::runtime_error if other has no facet of type Facet.
+ */
+ template<typename _Facet>
+ locale
+ combine(const locale& __other) const;
+
+ // Locale operations:
+ /**
+ * @brief Return locale name.
+ * @return Locale name or "*" if unnamed.
+ */
+ string
+ name() const;
+
+ /**
+ * @brief Locale equality.
+ *
+ * @param other The locale to compare against.
+ * @return True if other and this refer to the same locale instance, are
+ * copies, or have the same name. False otherwise.
+ */
+ bool
+ operator==(const locale& __other) const throw ();
+
+ /**
+ * @brief Locale inequality.
+ *
+ * @param other The locale to compare against.
+ * @return ! (*this == other)
+ */
+ bool
+ operator!=(const locale& __other) const throw ()
+ { return !(this->operator==(__other)); }
+
+ /**
+ * @brief Compare two strings according to collate.
+ *
+ * Template operator to compare two strings using the compare function of
+ * the collate facet in this locale. One use is to provide the locale to
+ * the sort function. For example, a vector v of strings could be sorted
+ * according to locale loc by doing:
+ * @code
+ * std::sort(v.begin(), v.end(), loc);
+ * @endcode
+ *
+ * @param s1 First string to compare.
+ * @param s2 Second string to compare.
+ * @return True if collate<Char> facet compares s1 < s2, else false.
+ */
+ template<typename _Char, typename _Traits, typename _Alloc>
+ bool
+ operator()(const basic_string<_Char, _Traits, _Alloc>& __s1,
+ const basic_string<_Char, _Traits, _Alloc>& __s2) const;
+
+ // Global locale objects:
+ /**
+ * @brief Set global locale
+ *
+ * This function sets the global locale to the argument and returns a
+ * copy of the previous global locale. If the argument has a name, it
+ * will also call std::setlocale(LC_ALL, loc.name()).
+ *
+ * @param locale The new locale to make global.
+ * @return Copy of the old global locale.
+ */
+ static locale
+ global(const locale&);
+
+ /**
+ * @brief Return reference to the "C" locale.
+ */
+ static const locale&
+ classic();
+
+ private:
+ // The (shared) implementation
+ _Impl* _M_impl;
+
+ // The "C" reference locale
+ static _Impl* _S_classic;
+
+ // Current global locale
+ static _Impl* _S_global;
+
+ // Names of underlying locale categories.
+ // NB: locale::global() has to know how to modify all the
+ // underlying categories, not just the ones required by the C++
+ // standard.
+ static const char* const* const _S_categories;
+
+ // Number of standard categories. For C++, these categories are
+ // collate, ctype, monetary, numeric, time, and messages. These
+ // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE,
+ // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE
+ // 1003.1-2001) specifies LC_MESSAGES.
+ // In addition to the standard categories, the underlying
+ // operating system is allowed to define extra LC_*
+ // macros. For GNU systems, the following are also valid:
+ // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,
+ // and LC_IDENTIFICATION.
+ enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES };
+
+#ifdef __GTHREADS
+ static __gthread_once_t _S_once;
+#endif
+
+ explicit
+ locale(_Impl*) throw();
+
+ static void
+ _S_initialize();
+
+ static void
+ _S_initialize_once();
+
+ static category
+ _S_normalize_category(category);
+
+ void
+ _M_coalesce(const locale& __base, const locale& __add, category __cat);
+ };
+
+
+ // 22.1.1.1.2 Class locale::facet
+ /**
+ * @brief Localization functionality base class.
+ *
+ * The facet class is the base class for a localization feature, such as
+ * money, time, and number printing. It provides common support for facets
+ * and reference management.
+ *
+ * Facets may not be copied or assigned.
+ */
+ class locale::facet
+ {
+ private:
+ friend class locale;
+ friend class locale::_Impl;
+
+ mutable _Atomic_word _M_refcount;
+
+ // Contains data from the underlying "C" library for the classic locale.
+ static __c_locale _S_c_locale;
+
+ // String literal for the name of the classic locale.
+ static const char _S_c_name[2];
+
+#ifdef __GTHREADS
+ static __gthread_once_t _S_once;
+#endif
+
+ static void
+ _S_initialize_once();
+
+ protected:
+ /**
+ * @brief Facet constructor.
+ *
+ * This is the constructor provided by the standard. If refs is 0, the
+ * facet is destroyed when the last referencing locale is destroyed.
+ * Otherwise the facet will never be destroyed.
+ *
+ * @param refs The initial value for reference count.
+ */
+ explicit
+ facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0)
+ { }
+
+ /// Facet destructor.
+ virtual
+ ~facet();
+
+ static void
+ _S_create_c_locale(__c_locale& __cloc, const char* __s,
+ __c_locale __old = 0);
+
+ static __c_locale
+ _S_clone_c_locale(__c_locale& __cloc);
+
+ static void
+ _S_destroy_c_locale(__c_locale& __cloc);
+
+ // Returns data from the underlying "C" library data for the
+ // classic locale.
+ static __c_locale
+ _S_get_c_locale();
+
+ static const char*
+ _S_get_c_name();
+
+ private:
+ void
+ _M_add_reference() const throw()
+ { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
+
+ void
+ _M_remove_reference() const throw()
+ {
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
+ {
+ __try
+ { delete this; }
+ __catch(...)
+ { }
+ }
+ }
+
+ facet(const facet&); // Not defined.
+
+ facet&
+ operator=(const facet&); // Not defined.
+ };
+
+
+ // 22.1.1.1.3 Class locale::id
+ /**
+ * @brief Facet ID class.
+ *
+ * The ID class provides facets with an index used to identify them.
+ * Every facet class must define a public static member locale::id, or be
+ * derived from a facet that provides this member, otherwise the facet
+ * cannot be used in a locale. The locale::id ensures that each class
+ * type gets a unique identifier.
+ */
+ class locale::id
+ {
+ private:
+ friend class locale;
+ friend class locale::_Impl;
+
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw ();
+
+ // NB: There is no accessor for _M_index because it may be used
+ // before the constructor is run; the effect of calling a member
+ // function (even an inline) would be undefined.
+ mutable size_t _M_index;
+
+ // Last id number assigned.
+ static _Atomic_word _S_refcount;
+
+ void
+ operator=(const id&); // Not defined.
+
+ id(const id&); // Not defined.
+
+ public:
+ // NB: This class is always a static data member, and thus can be
+ // counted on to be zero-initialized.
+ /// Constructor.
+ id() { }
+
+ size_t
+ _M_id() const;
+ };
+
+
+ // Implementation object for locale.
+ class locale::_Impl
+ {
+ public:
+ // Friends.
+ friend class locale;
+ friend class locale::facet;
+
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw();
+
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+
+ template<typename _Cache>
+ friend struct __use_cache;
+
+ private:
+ // Data Members.
+ _Atomic_word _M_refcount;
+ const facet** _M_facets;
+ size_t _M_facets_size;
+ const facet** _M_caches;
+ char** _M_names;
+ static const locale::id* const _S_id_ctype[];
+ static const locale::id* const _S_id_numeric[];
+ static const locale::id* const _S_id_collate[];
+ static const locale::id* const _S_id_time[];
+ static const locale::id* const _S_id_monetary[];
+ static const locale::id* const _S_id_messages[];
+ static const locale::id* const* const _S_facet_categories[];
+
+ void
+ _M_add_reference() throw()
+ { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
+
+ void
+ _M_remove_reference() throw()
+ {
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
+ {
+ __try
+ { delete this; }
+ __catch(...)
+ { }
+ }
+ }
+
+ _Impl(const _Impl&, size_t);
+ _Impl(const char*, size_t);
+ _Impl(size_t) throw();
+
+ ~_Impl() throw();
+
+ _Impl(const _Impl&); // Not defined.
+
+ void
+ operator=(const _Impl&); // Not defined.
+
+ bool
+ _M_check_same_name()
+ {
+ bool __ret = true;
+ if (_M_names[1])
+ // We must actually compare all the _M_names: can be all equal!
+ for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i)
+ __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0;
+ return __ret;
+ }
+
+ void
+ _M_replace_categories(const _Impl*, category);
+
+ void
+ _M_replace_category(const _Impl*, const locale::id* const*);
+
+ void
+ _M_replace_facet(const _Impl*, const locale::id*);
+
+ void
+ _M_install_facet(const locale::id*, const facet*);
+
+ template<typename _Facet>
+ void
+ _M_init_facet(_Facet* __facet)
+ { _M_install_facet(&_Facet::id, __facet); }
+
+ void
+ _M_install_cache(const facet*, size_t);
+ };
+
+
+ /**
+ * @brief Test for the presence of a facet.
+ *
+ * has_facet tests the locale argument for the presence of the facet type
+ * provided as the template parameter. Facets derived from the facet
+ * parameter will also return true.
+ *
+ * @param Facet The facet type to test the presence of.
+ * @param locale The locale to test.
+ * @return true if locale contains a facet of type Facet, else false.
+ */
+ template<typename _Facet>
+ bool
+ has_facet(const locale& __loc) throw();
+
+ /**
+ * @brief Return a facet.
+ *
+ * use_facet looks for and returns a reference to a facet of type Facet
+ * where Facet is the template parameter. If has_facet(locale) is true,
+ * there is a suitable facet to return. It throws std::bad_cast if the
+ * locale doesn't contain a facet of type Facet.
+ *
+ * @param Facet The facet type to access.
+ * @param locale The locale to use.
+ * @return Reference to facet of type Facet.
+ * @throw std::bad_cast if locale doesn't contain a facet of type Facet.
+ */
+ template<typename _Facet>
+ const _Facet&
+ use_facet(const locale& __loc);
+
+
+ /**
+ * @brief Facet for localized string comparison.
+ *
+ * This facet encapsulates the code to compare strings in a localized
+ * manner.
+ *
+ * The collate template uses protected virtual functions to provide
+ * the actual results. The public accessors forward the call to
+ * the virtual functions. These virtual functions are hooks for
+ * developers to implement the behavior they require from the
+ * collate facet.
+ */
+ template<typename _CharT>
+ class collate : public locale::facet
+ {
+ public:
+ // Types:
+ //@{
+ /// Public typedefs
+ typedef _CharT char_type;
+ typedef basic_string<_CharT> string_type;
+ //@}
+
+ protected:
+ // Underlying "C" library locale information saved from
+ // initialization, needed by collate_byname as well.
+ __c_locale _M_c_locale_collate;
+
+ public:
+ /// Numpunct facet id.
+ static locale::id id;
+
+ /**
+ * @brief Constructor performs initialization.
+ *
+ * This is the constructor provided by the standard.
+ *
+ * @param refs Passed to the base facet class.
+ */
+ explicit
+ collate(size_t __refs = 0)
+ : facet(__refs), _M_c_locale_collate(_S_get_c_locale())
+ { }
+
+ /**
+ * @brief Internal constructor. Not for general use.
+ *
+ * This is a constructor for use by the library itself to set up new
+ * locales.
+ *
+ * @param cloc The "C" locale.
+ * @param refs Passed to the base facet class.
+ */
+ explicit
+ collate(__c_locale __cloc, size_t __refs = 0)
+ : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc))
+ { }
+
+ /**
+ * @brief Compare two strings.
+ *
+ * This function compares two strings and returns the result by calling
+ * collate::do_compare().
+ *
+ * @param lo1 Start of string 1.
+ * @param hi1 End of string 1.
+ * @param lo2 Start of string 2.
+ * @param hi2 End of string 2.
+ * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
+ */
+ int
+ compare(const _CharT* __lo1, const _CharT* __hi1,
+ const _CharT* __lo2, const _CharT* __hi2) const
+ { return this->do_compare(__lo1, __hi1, __lo2, __hi2); }
+
+ /**
+ * @brief Transform string to comparable form.
+ *
+ * This function is a wrapper for strxfrm functionality. It takes the
+ * input string and returns a modified string that can be directly
+ * compared to other transformed strings. In the "C" locale, this
+ * function just returns a copy of the input string. In some other
+ * locales, it may replace two chars with one, change a char for
+ * another, etc. It does so by returning collate::do_transform().
+ *
+ * @param lo Start of string.
+ * @param hi End of string.
+ * @return Transformed string_type.
+ */
+ string_type
+ transform(const _CharT* __lo, const _CharT* __hi) const
+ { return this->do_transform(__lo, __hi); }
+
+ /**
+ * @brief Return hash of a string.
+ *
+ * This function computes and returns a hash on the input string. It
+ * does so by returning collate::do_hash().
+ *
+ * @param lo Start of string.
+ * @param hi End of string.
+ * @return Hash value.
+ */
+ long
+ hash(const _CharT* __lo, const _CharT* __hi) const
+ { return this->do_hash(__lo, __hi); }
+
+ // Used to abstract out _CharT bits in virtual member functions, below.
+ int
+ _M_compare(const _CharT*, const _CharT*) const;
+
+ size_t
+ _M_transform(_CharT*, const _CharT*, size_t) const;
+
+ protected:
+ /// Destructor.
+ virtual
+ ~collate()
+ { _S_destroy_c_locale(_M_c_locale_collate); }
+
+ /**
+ * @brief Compare two strings.
+ *
+ * This function is a hook for derived classes to change the value
+ * returned. @see compare().
+ *
+ * @param lo1 Start of string 1.
+ * @param hi1 End of string 1.
+ * @param lo2 Start of string 2.
+ * @param hi2 End of string 2.
+ * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
+ */
+ virtual int
+ do_compare(const _CharT* __lo1, const _CharT* __hi1,
+ const _CharT* __lo2, const _CharT* __hi2) const;
+
+ /**
+ * @brief Transform string to comparable form.
+ *
+ * This function is a hook for derived classes to change the value
+ * returned.
+ *
+ * @param lo1 Start of string 1.
+ * @param hi1 End of string 1.
+ * @param lo2 Start of string 2.
+ * @param hi2 End of string 2.
+ * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
+ */
+ virtual string_type
+ do_transform(const _CharT* __lo, const _CharT* __hi) const;
+
+ /**
+ * @brief Return hash of a string.
+ *
+ * This function computes and returns a hash on the input string. This
+ * function is a hook for derived classes to change the value returned.
+ *
+ * @param lo Start of string.
+ * @param hi End of string.
+ * @return Hash value.
+ */
+ virtual long
+ do_hash(const _CharT* __lo, const _CharT* __hi) const;
+ };
+
+ template<typename _CharT>
+ locale::id collate<_CharT>::id;
+
+ // Specializations.
+ template<>
+ int
+ collate<char>::_M_compare(const char*, const char*) const;
+
+ template<>
+ size_t
+ collate<char>::_M_transform(char*, const char*, size_t) const;
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ template<>
+ int
+ collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const;
+
+ template<>
+ size_t
+ collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const;
+#endif
+
+ /// class collate_byname [22.2.4.2].
+ template<typename _CharT>
+ class collate_byname : public collate<_CharT>
+ {
+ public:
+ //@{
+ /// Public typedefs
+ typedef _CharT char_type;
+ typedef basic_string<_CharT> string_type;
+ //@}
+
+ explicit
+ collate_byname(const char* __s, size_t __refs = 0)
+ : collate<_CharT>(__refs)
+ {
+ if (__builtin_strcmp(__s, "C") != 0
+ && __builtin_strcmp(__s, "POSIX") != 0)
+ {
+ this->_S_destroy_c_locale(this->_M_c_locale_collate);
+ this->_S_create_c_locale(this->_M_c_locale_collate, __s);
+ }
+ }
+
+ protected:
+ virtual
+ ~collate_byname() { }
+ };
+
+_GLIBCXX_END_NAMESPACE
+
+#ifndef _GLIBCXX_EXPORT_TEMPLATE
+# include <bits/locale_classes.tcc>
+#endif
+
+#endif
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