libstdc++
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00001 // Locale support -*- C++ -*- 00002 00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 00004 // 2006, 2007, 2008, 2009 00005 // Free Software Foundation, Inc. 00006 // 00007 // This file is part of the GNU ISO C++ Library. This library is free 00008 // software; you can redistribute it and/or modify it under the 00009 // terms of the GNU General Public License as published by the 00010 // Free Software Foundation; either version 3, or (at your option) 00011 // any later version. 00012 00013 // This library is distributed in the hope that it will be useful, 00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 // GNU General Public License for more details. 00017 00018 // Under Section 7 of GPL version 3, you are granted additional 00019 // permissions described in the GCC Runtime Library Exception, version 00020 // 3.1, as published by the Free Software Foundation. 00021 00022 // You should have received a copy of the GNU General Public License and 00023 // a copy of the GCC Runtime Library Exception along with this program; 00024 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00025 // <http://www.gnu.org/licenses/>. 00026 00027 /** @file locale_classes.h 00028 * This is an internal header file, included by other library headers. 00029 * You should not attempt to use it directly. 00030 */ 00031 00032 // 00033 // ISO C++ 14882: 22.1 Locales 00034 // 00035 00036 #ifndef _LOCALE_CLASSES_H 00037 #define _LOCALE_CLASSES_H 1 00038 00039 #pragma GCC system_header 00040 00041 #include <bits/localefwd.h> 00042 #include <string> 00043 #include <ext/atomicity.h> 00044 00045 _GLIBCXX_BEGIN_NAMESPACE(std) 00046 00047 // 22.1.1 Class locale 00048 /** 00049 * @brief Container class for localization functionality. 00050 * 00051 * The locale class is first a class wrapper for C library locales. It is 00052 * also an extensible container for user-defined localization. A locale is 00053 * a collection of facets that implement various localization features such 00054 * as money, time, and number printing. 00055 * 00056 * Constructing C++ locales does not change the C library locale. 00057 * 00058 * This library supports efficient construction and copying of locales 00059 * through a reference counting implementation of the locale class. 00060 */ 00061 class locale 00062 { 00063 public: 00064 // Types: 00065 /// Definition of locale::category. 00066 typedef int category; 00067 00068 // Forward decls and friends: 00069 class facet; 00070 class id; 00071 class _Impl; 00072 00073 friend class facet; 00074 friend class _Impl; 00075 00076 template<typename _Facet> 00077 friend bool 00078 has_facet(const locale&) throw(); 00079 00080 template<typename _Facet> 00081 friend const _Facet& 00082 use_facet(const locale&); 00083 00084 template<typename _Cache> 00085 friend struct __use_cache; 00086 00087 //@{ 00088 /** 00089 * @brief Category values. 00090 * 00091 * The standard category values are none, ctype, numeric, collate, time, 00092 * monetary, and messages. They form a bitmask that supports union and 00093 * intersection. The category all is the union of these values. 00094 * 00095 * NB: Order must match _S_facet_categories definition in locale.cc 00096 */ 00097 static const category none = 0; 00098 static const category ctype = 1L << 0; 00099 static const category numeric = 1L << 1; 00100 static const category collate = 1L << 2; 00101 static const category time = 1L << 3; 00102 static const category monetary = 1L << 4; 00103 static const category messages = 1L << 5; 00104 static const category all = (ctype | numeric | collate | 00105 time | monetary | messages); 00106 //@} 00107 00108 // Construct/copy/destroy: 00109 00110 /** 00111 * @brief Default constructor. 00112 * 00113 * Constructs a copy of the global locale. If no locale has been 00114 * explicitly set, this is the "C" locale. 00115 */ 00116 locale() throw(); 00117 00118 /** 00119 * @brief Copy constructor. 00120 * 00121 * Constructs a copy of @a other. 00122 * 00123 * @param other The locale to copy. 00124 */ 00125 locale(const locale& __other) throw(); 00126 00127 /** 00128 * @brief Named locale constructor. 00129 * 00130 * Constructs a copy of the named C library locale. 00131 * 00132 * @param s Name of the locale to construct. 00133 * @throw std::runtime_error if s is null or an undefined locale. 00134 */ 00135 explicit 00136 locale(const char* __s); 00137 00138 /** 00139 * @brief Construct locale with facets from another locale. 00140 * 00141 * Constructs a copy of the locale @a base. The facets specified by @a 00142 * cat are replaced with those from the locale named by @a s. If base is 00143 * named, this locale instance will also be named. 00144 * 00145 * @param base The locale to copy. 00146 * @param s Name of the locale to use facets from. 00147 * @param cat Set of categories defining the facets to use from s. 00148 * @throw std::runtime_error if s is null or an undefined locale. 00149 */ 00150 locale(const locale& __base, const char* __s, category __cat); 00151 00152 /** 00153 * @brief Construct locale with facets from another locale. 00154 * 00155 * Constructs a copy of the locale @a base. The facets specified by @a 00156 * cat are replaced with those from the locale @a add. If @a base and @a 00157 * add are named, this locale instance will also be named. 00158 * 00159 * @param base The locale to copy. 00160 * @param add The locale to use facets from. 00161 * @param cat Set of categories defining the facets to use from add. 00162 */ 00163 locale(const locale& __base, const locale& __add, category __cat); 00164 00165 /** 00166 * @brief Construct locale with another facet. 00167 * 00168 * Constructs a copy of the locale @a other. The facet @f is added to 00169 * @other, replacing an existing facet of type Facet if there is one. If 00170 * @f is null, this locale is a copy of @a other. 00171 * 00172 * @param other The locale to copy. 00173 * @param f The facet to add in. 00174 */ 00175 template<typename _Facet> 00176 locale(const locale& __other, _Facet* __f); 00177 00178 /// Locale destructor. 00179 ~locale() throw(); 00180 00181 /** 00182 * @brief Assignment operator. 00183 * 00184 * Set this locale to be a copy of @a other. 00185 * 00186 * @param other The locale to copy. 00187 * @return A reference to this locale. 00188 */ 00189 const locale& 00190 operator=(const locale& __other) throw(); 00191 00192 /** 00193 * @brief Construct locale with another facet. 00194 * 00195 * Constructs and returns a new copy of this locale. Adds or replaces an 00196 * existing facet of type Facet from the locale @a other into the new 00197 * locale. 00198 * 00199 * @param Facet The facet type to copy from other 00200 * @param other The locale to copy from. 00201 * @return Newly constructed locale. 00202 * @throw std::runtime_error if other has no facet of type Facet. 00203 */ 00204 template<typename _Facet> 00205 locale 00206 combine(const locale& __other) const; 00207 00208 // Locale operations: 00209 /** 00210 * @brief Return locale name. 00211 * @return Locale name or "*" if unnamed. 00212 */ 00213 string 00214 name() const; 00215 00216 /** 00217 * @brief Locale equality. 00218 * 00219 * @param other The locale to compare against. 00220 * @return True if other and this refer to the same locale instance, are 00221 * copies, or have the same name. False otherwise. 00222 */ 00223 bool 00224 operator==(const locale& __other) const throw (); 00225 00226 /** 00227 * @brief Locale inequality. 00228 * 00229 * @param other The locale to compare against. 00230 * @return ! (*this == other) 00231 */ 00232 bool 00233 operator!=(const locale& __other) const throw () 00234 { return !(this->operator==(__other)); } 00235 00236 /** 00237 * @brief Compare two strings according to collate. 00238 * 00239 * Template operator to compare two strings using the compare function of 00240 * the collate facet in this locale. One use is to provide the locale to 00241 * the sort function. For example, a vector v of strings could be sorted 00242 * according to locale loc by doing: 00243 * @code 00244 * std::sort(v.begin(), v.end(), loc); 00245 * @endcode 00246 * 00247 * @param s1 First string to compare. 00248 * @param s2 Second string to compare. 00249 * @return True if collate<Char> facet compares s1 < s2, else false. 00250 */ 00251 template<typename _Char, typename _Traits, typename _Alloc> 00252 bool 00253 operator()(const basic_string<_Char, _Traits, _Alloc>& __s1, 00254 const basic_string<_Char, _Traits, _Alloc>& __s2) const; 00255 00256 // Global locale objects: 00257 /** 00258 * @brief Set global locale 00259 * 00260 * This function sets the global locale to the argument and returns a 00261 * copy of the previous global locale. If the argument has a name, it 00262 * will also call std::setlocale(LC_ALL, loc.name()). 00263 * 00264 * @param locale The new locale to make global. 00265 * @return Copy of the old global locale. 00266 */ 00267 static locale 00268 global(const locale&); 00269 00270 /** 00271 * @brief Return reference to the "C" locale. 00272 */ 00273 static const locale& 00274 classic(); 00275 00276 private: 00277 // The (shared) implementation 00278 _Impl* _M_impl; 00279 00280 // The "C" reference locale 00281 static _Impl* _S_classic; 00282 00283 // Current global locale 00284 static _Impl* _S_global; 00285 00286 // Names of underlying locale categories. 00287 // NB: locale::global() has to know how to modify all the 00288 // underlying categories, not just the ones required by the C++ 00289 // standard. 00290 static const char* const* const _S_categories; 00291 00292 // Number of standard categories. For C++, these categories are 00293 // collate, ctype, monetary, numeric, time, and messages. These 00294 // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE, 00295 // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE 00296 // 1003.1-2001) specifies LC_MESSAGES. 00297 // In addition to the standard categories, the underlying 00298 // operating system is allowed to define extra LC_* 00299 // macros. For GNU systems, the following are also valid: 00300 // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, 00301 // and LC_IDENTIFICATION. 00302 enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES }; 00303 00304 #ifdef __GTHREADS 00305 static __gthread_once_t _S_once; 00306 #endif 00307 00308 explicit 00309 locale(_Impl*) throw(); 00310 00311 static void 00312 _S_initialize(); 00313 00314 static void 00315 _S_initialize_once(); 00316 00317 static category 00318 _S_normalize_category(category); 00319 00320 void 00321 _M_coalesce(const locale& __base, const locale& __add, category __cat); 00322 }; 00323 00324 00325 // 22.1.1.1.2 Class locale::facet 00326 /** 00327 * @brief Localization functionality base class. 00328 * 00329 * The facet class is the base class for a localization feature, such as 00330 * money, time, and number printing. It provides common support for facets 00331 * and reference management. 00332 * 00333 * Facets may not be copied or assigned. 00334 */ 00335 class locale::facet 00336 { 00337 private: 00338 friend class locale; 00339 friend class locale::_Impl; 00340 00341 mutable _Atomic_word _M_refcount; 00342 00343 // Contains data from the underlying "C" library for the classic locale. 00344 static __c_locale _S_c_locale; 00345 00346 // String literal for the name of the classic locale. 00347 static const char _S_c_name[2]; 00348 00349 #ifdef __GTHREADS 00350 static __gthread_once_t _S_once; 00351 #endif 00352 00353 static void 00354 _S_initialize_once(); 00355 00356 protected: 00357 /** 00358 * @brief Facet constructor. 00359 * 00360 * This is the constructor provided by the standard. If refs is 0, the 00361 * facet is destroyed when the last referencing locale is destroyed. 00362 * Otherwise the facet will never be destroyed. 00363 * 00364 * @param refs The initial value for reference count. 00365 */ 00366 explicit 00367 facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0) 00368 { } 00369 00370 /// Facet destructor. 00371 virtual 00372 ~facet(); 00373 00374 static void 00375 _S_create_c_locale(__c_locale& __cloc, const char* __s, 00376 __c_locale __old = 0); 00377 00378 static __c_locale 00379 _S_clone_c_locale(__c_locale& __cloc); 00380 00381 static void 00382 _S_destroy_c_locale(__c_locale& __cloc); 00383 00384 // Returns data from the underlying "C" library data for the 00385 // classic locale. 00386 static __c_locale 00387 _S_get_c_locale(); 00388 00389 static const char* 00390 _S_get_c_name(); 00391 00392 private: 00393 void 00394 _M_add_reference() const throw() 00395 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00396 00397 void 00398 _M_remove_reference() const throw() 00399 { 00400 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00401 { 00402 __try 00403 { delete this; } 00404 __catch(...) 00405 { } 00406 } 00407 } 00408 00409 facet(const facet&); // Not defined. 00410 00411 facet& 00412 operator=(const facet&); // Not defined. 00413 }; 00414 00415 00416 // 22.1.1.1.3 Class locale::id 00417 /** 00418 * @brief Facet ID class. 00419 * 00420 * The ID class provides facets with an index used to identify them. 00421 * Every facet class must define a public static member locale::id, or be 00422 * derived from a facet that provides this member, otherwise the facet 00423 * cannot be used in a locale. The locale::id ensures that each class 00424 * type gets a unique identifier. 00425 */ 00426 class locale::id 00427 { 00428 private: 00429 friend class locale; 00430 friend class locale::_Impl; 00431 00432 template<typename _Facet> 00433 friend const _Facet& 00434 use_facet(const locale&); 00435 00436 template<typename _Facet> 00437 friend bool 00438 has_facet(const locale&) throw (); 00439 00440 // NB: There is no accessor for _M_index because it may be used 00441 // before the constructor is run; the effect of calling a member 00442 // function (even an inline) would be undefined. 00443 mutable size_t _M_index; 00444 00445 // Last id number assigned. 00446 static _Atomic_word _S_refcount; 00447 00448 void 00449 operator=(const id&); // Not defined. 00450 00451 id(const id&); // Not defined. 00452 00453 public: 00454 // NB: This class is always a static data member, and thus can be 00455 // counted on to be zero-initialized. 00456 /// Constructor. 00457 id() { } 00458 00459 size_t 00460 _M_id() const; 00461 }; 00462 00463 00464 // Implementation object for locale. 00465 class locale::_Impl 00466 { 00467 public: 00468 // Friends. 00469 friend class locale; 00470 friend class locale::facet; 00471 00472 template<typename _Facet> 00473 friend bool 00474 has_facet(const locale&) throw(); 00475 00476 template<typename _Facet> 00477 friend const _Facet& 00478 use_facet(const locale&); 00479 00480 template<typename _Cache> 00481 friend struct __use_cache; 00482 00483 private: 00484 // Data Members. 00485 _Atomic_word _M_refcount; 00486 const facet** _M_facets; 00487 size_t _M_facets_size; 00488 const facet** _M_caches; 00489 char** _M_names; 00490 static const locale::id* const _S_id_ctype[]; 00491 static const locale::id* const _S_id_numeric[]; 00492 static const locale::id* const _S_id_collate[]; 00493 static const locale::id* const _S_id_time[]; 00494 static const locale::id* const _S_id_monetary[]; 00495 static const locale::id* const _S_id_messages[]; 00496 static const locale::id* const* const _S_facet_categories[]; 00497 00498 void 00499 _M_add_reference() throw() 00500 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00501 00502 void 00503 _M_remove_reference() throw() 00504 { 00505 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00506 { 00507 __try 00508 { delete this; } 00509 __catch(...) 00510 { } 00511 } 00512 } 00513 00514 _Impl(const _Impl&, size_t); 00515 _Impl(const char*, size_t); 00516 _Impl(size_t) throw(); 00517 00518 ~_Impl() throw(); 00519 00520 _Impl(const _Impl&); // Not defined. 00521 00522 void 00523 operator=(const _Impl&); // Not defined. 00524 00525 bool 00526 _M_check_same_name() 00527 { 00528 bool __ret = true; 00529 if (_M_names[1]) 00530 // We must actually compare all the _M_names: can be all equal! 00531 for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i) 00532 __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0; 00533 return __ret; 00534 } 00535 00536 void 00537 _M_replace_categories(const _Impl*, category); 00538 00539 void 00540 _M_replace_category(const _Impl*, const locale::id* const*); 00541 00542 void 00543 _M_replace_facet(const _Impl*, const locale::id*); 00544 00545 void 00546 _M_install_facet(const locale::id*, const facet*); 00547 00548 template<typename _Facet> 00549 void 00550 _M_init_facet(_Facet* __facet) 00551 { _M_install_facet(&_Facet::id, __facet); } 00552 00553 void 00554 _M_install_cache(const facet*, size_t); 00555 }; 00556 00557 00558 /** 00559 * @brief Test for the presence of a facet. 00560 * 00561 * has_facet tests the locale argument for the presence of the facet type 00562 * provided as the template parameter. Facets derived from the facet 00563 * parameter will also return true. 00564 * 00565 * @param Facet The facet type to test the presence of. 00566 * @param locale The locale to test. 00567 * @return true if locale contains a facet of type Facet, else false. 00568 */ 00569 template<typename _Facet> 00570 bool 00571 has_facet(const locale& __loc) throw(); 00572 00573 /** 00574 * @brief Return a facet. 00575 * 00576 * use_facet looks for and returns a reference to a facet of type Facet 00577 * where Facet is the template parameter. If has_facet(locale) is true, 00578 * there is a suitable facet to return. It throws std::bad_cast if the 00579 * locale doesn't contain a facet of type Facet. 00580 * 00581 * @param Facet The facet type to access. 00582 * @param locale The locale to use. 00583 * @return Reference to facet of type Facet. 00584 * @throw std::bad_cast if locale doesn't contain a facet of type Facet. 00585 */ 00586 template<typename _Facet> 00587 const _Facet& 00588 use_facet(const locale& __loc); 00589 00590 00591 /** 00592 * @brief Facet for localized string comparison. 00593 * 00594 * This facet encapsulates the code to compare strings in a localized 00595 * manner. 00596 * 00597 * The collate template uses protected virtual functions to provide 00598 * the actual results. The public accessors forward the call to 00599 * the virtual functions. These virtual functions are hooks for 00600 * developers to implement the behavior they require from the 00601 * collate facet. 00602 */ 00603 template<typename _CharT> 00604 class collate : public locale::facet 00605 { 00606 public: 00607 // Types: 00608 //@{ 00609 /// Public typedefs 00610 typedef _CharT char_type; 00611 typedef basic_string<_CharT> string_type; 00612 //@} 00613 00614 protected: 00615 // Underlying "C" library locale information saved from 00616 // initialization, needed by collate_byname as well. 00617 __c_locale _M_c_locale_collate; 00618 00619 public: 00620 /// Numpunct facet id. 00621 static locale::id id; 00622 00623 /** 00624 * @brief Constructor performs initialization. 00625 * 00626 * This is the constructor provided by the standard. 00627 * 00628 * @param refs Passed to the base facet class. 00629 */ 00630 explicit 00631 collate(size_t __refs = 0) 00632 : facet(__refs), _M_c_locale_collate(_S_get_c_locale()) 00633 { } 00634 00635 /** 00636 * @brief Internal constructor. Not for general use. 00637 * 00638 * This is a constructor for use by the library itself to set up new 00639 * locales. 00640 * 00641 * @param cloc The "C" locale. 00642 * @param refs Passed to the base facet class. 00643 */ 00644 explicit 00645 collate(__c_locale __cloc, size_t __refs = 0) 00646 : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc)) 00647 { } 00648 00649 /** 00650 * @brief Compare two strings. 00651 * 00652 * This function compares two strings and returns the result by calling 00653 * collate::do_compare(). 00654 * 00655 * @param lo1 Start of string 1. 00656 * @param hi1 End of string 1. 00657 * @param lo2 Start of string 2. 00658 * @param hi2 End of string 2. 00659 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00660 */ 00661 int 00662 compare(const _CharT* __lo1, const _CharT* __hi1, 00663 const _CharT* __lo2, const _CharT* __hi2) const 00664 { return this->do_compare(__lo1, __hi1, __lo2, __hi2); } 00665 00666 /** 00667 * @brief Transform string to comparable form. 00668 * 00669 * This function is a wrapper for strxfrm functionality. It takes the 00670 * input string and returns a modified string that can be directly 00671 * compared to other transformed strings. In the "C" locale, this 00672 * function just returns a copy of the input string. In some other 00673 * locales, it may replace two chars with one, change a char for 00674 * another, etc. It does so by returning collate::do_transform(). 00675 * 00676 * @param lo Start of string. 00677 * @param hi End of string. 00678 * @return Transformed string_type. 00679 */ 00680 string_type 00681 transform(const _CharT* __lo, const _CharT* __hi) const 00682 { return this->do_transform(__lo, __hi); } 00683 00684 /** 00685 * @brief Return hash of a string. 00686 * 00687 * This function computes and returns a hash on the input string. It 00688 * does so by returning collate::do_hash(). 00689 * 00690 * @param lo Start of string. 00691 * @param hi End of string. 00692 * @return Hash value. 00693 */ 00694 long 00695 hash(const _CharT* __lo, const _CharT* __hi) const 00696 { return this->do_hash(__lo, __hi); } 00697 00698 // Used to abstract out _CharT bits in virtual member functions, below. 00699 int 00700 _M_compare(const _CharT*, const _CharT*) const; 00701 00702 size_t 00703 _M_transform(_CharT*, const _CharT*, size_t) const; 00704 00705 protected: 00706 /// Destructor. 00707 virtual 00708 ~collate() 00709 { _S_destroy_c_locale(_M_c_locale_collate); } 00710 00711 /** 00712 * @brief Compare two strings. 00713 * 00714 * This function is a hook for derived classes to change the value 00715 * returned. @see compare(). 00716 * 00717 * @param lo1 Start of string 1. 00718 * @param hi1 End of string 1. 00719 * @param lo2 Start of string 2. 00720 * @param hi2 End of string 2. 00721 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00722 */ 00723 virtual int 00724 do_compare(const _CharT* __lo1, const _CharT* __hi1, 00725 const _CharT* __lo2, const _CharT* __hi2) const; 00726 00727 /** 00728 * @brief Transform string to comparable form. 00729 * 00730 * This function is a hook for derived classes to change the value 00731 * returned. 00732 * 00733 * @param lo1 Start of string 1. 00734 * @param hi1 End of string 1. 00735 * @param lo2 Start of string 2. 00736 * @param hi2 End of string 2. 00737 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00738 */ 00739 virtual string_type 00740 do_transform(const _CharT* __lo, const _CharT* __hi) const; 00741 00742 /** 00743 * @brief Return hash of a string. 00744 * 00745 * This function computes and returns a hash on the input string. This 00746 * function is a hook for derived classes to change the value returned. 00747 * 00748 * @param lo Start of string. 00749 * @param hi End of string. 00750 * @return Hash value. 00751 */ 00752 virtual long 00753 do_hash(const _CharT* __lo, const _CharT* __hi) const; 00754 }; 00755 00756 template<typename _CharT> 00757 locale::id collate<_CharT>::id; 00758 00759 // Specializations. 00760 template<> 00761 int 00762 collate<char>::_M_compare(const char*, const char*) const; 00763 00764 template<> 00765 size_t 00766 collate<char>::_M_transform(char*, const char*, size_t) const; 00767 00768 #ifdef _GLIBCXX_USE_WCHAR_T 00769 template<> 00770 int 00771 collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const; 00772 00773 template<> 00774 size_t 00775 collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const; 00776 #endif 00777 00778 /// class collate_byname [22.2.4.2]. 00779 template<typename _CharT> 00780 class collate_byname : public collate<_CharT> 00781 { 00782 public: 00783 //@{ 00784 /// Public typedefs 00785 typedef _CharT char_type; 00786 typedef basic_string<_CharT> string_type; 00787 //@} 00788 00789 explicit 00790 collate_byname(const char* __s, size_t __refs = 0) 00791 : collate<_CharT>(__refs) 00792 { 00793 if (__builtin_strcmp(__s, "C") != 0 00794 && __builtin_strcmp(__s, "POSIX") != 0) 00795 { 00796 this->_S_destroy_c_locale(this->_M_c_locale_collate); 00797 this->_S_create_c_locale(this->_M_c_locale_collate, __s); 00798 } 00799 } 00800 00801 protected: 00802 virtual 00803 ~collate_byname() { } 00804 }; 00805 00806 _GLIBCXX_END_NAMESPACE 00807 00808 #ifndef _GLIBCXX_EXPORT_TEMPLATE 00809 # include <bits/locale_classes.tcc> 00810 #endif 00811 00812 #endif