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, 2010, 2011 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 bits/locale_classes.h 00028 * This is an internal header file, included by other library headers. 00029 * Do not attempt to use it directly. @headername{locale} 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 namespace std _GLIBCXX_VISIBILITY(default) 00046 { 00047 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00048 00049 // 22.1.1 Class locale 00050 /** 00051 * @brief Container class for localization functionality. 00052 * @ingroup locales 00053 * 00054 * The locale class is first a class wrapper for C library locales. It is 00055 * also an extensible container for user-defined localization. A locale is 00056 * a collection of facets that implement various localization features such 00057 * as money, time, and number printing. 00058 * 00059 * Constructing C++ locales does not change the C library locale. 00060 * 00061 * This library supports efficient construction and copying of locales 00062 * through a reference counting implementation of the locale class. 00063 */ 00064 class locale 00065 { 00066 public: 00067 // Types: 00068 /// Definition of locale::category. 00069 typedef int category; 00070 00071 // Forward decls and friends: 00072 class facet; 00073 class id; 00074 class _Impl; 00075 00076 friend class facet; 00077 friend class _Impl; 00078 00079 template<typename _Facet> 00080 friend bool 00081 has_facet(const locale&) throw(); 00082 00083 template<typename _Facet> 00084 friend const _Facet& 00085 use_facet(const locale&); 00086 00087 template<typename _Cache> 00088 friend struct __use_cache; 00089 00090 //@{ 00091 /** 00092 * @brief Category values. 00093 * 00094 * The standard category values are none, ctype, numeric, collate, time, 00095 * monetary, and messages. They form a bitmask that supports union and 00096 * intersection. The category all is the union of these values. 00097 * 00098 * NB: Order must match _S_facet_categories definition in locale.cc 00099 */ 00100 static const category none = 0; 00101 static const category ctype = 1L << 0; 00102 static const category numeric = 1L << 1; 00103 static const category collate = 1L << 2; 00104 static const category time = 1L << 3; 00105 static const category monetary = 1L << 4; 00106 static const category messages = 1L << 5; 00107 static const category all = (ctype | numeric | collate | 00108 time | monetary | messages); 00109 //@} 00110 00111 // Construct/copy/destroy: 00112 00113 /** 00114 * @brief Default constructor. 00115 * 00116 * Constructs a copy of the global locale. If no locale has been 00117 * explicitly set, this is the C locale. 00118 */ 00119 locale() throw(); 00120 00121 /** 00122 * @brief Copy constructor. 00123 * 00124 * Constructs a copy of @a other. 00125 * 00126 * @param other The locale to copy. 00127 */ 00128 locale(const locale& __other) throw(); 00129 00130 /** 00131 * @brief Named locale constructor. 00132 * 00133 * Constructs a copy of the named C library locale. 00134 * 00135 * @param s Name of the locale to construct. 00136 * @throw std::runtime_error if s is null or an undefined locale. 00137 */ 00138 explicit 00139 locale(const char* __s); 00140 00141 /** 00142 * @brief Construct locale with facets from another locale. 00143 * 00144 * Constructs a copy of the locale @a base. The facets specified by @a 00145 * cat are replaced with those from the locale named by @a s. If base is 00146 * named, this locale instance will also be named. 00147 * 00148 * @param base The locale to copy. 00149 * @param s Name of the locale to use facets from. 00150 * @param cat Set of categories defining the facets to use from s. 00151 * @throw std::runtime_error if s is null or an undefined locale. 00152 */ 00153 locale(const locale& __base, const char* __s, category __cat); 00154 00155 /** 00156 * @brief Construct locale with facets from another locale. 00157 * 00158 * Constructs a copy of the locale @a base. The facets specified by @a 00159 * cat are replaced with those from the locale @a add. If @a base and @a 00160 * add are named, this locale instance will also be named. 00161 * 00162 * @param base The locale to copy. 00163 * @param add The locale to use facets from. 00164 * @param cat Set of categories defining the facets to use from add. 00165 */ 00166 locale(const locale& __base, const locale& __add, category __cat); 00167 00168 /** 00169 * @brief Construct locale with another facet. 00170 * 00171 * Constructs a copy of the locale @a other. The facet @f is added to 00172 * @other, replacing an existing facet of type Facet if there is one. If 00173 * @f is null, this locale is a copy of @a other. 00174 * 00175 * @param other The locale to copy. 00176 * @param f The facet to add in. 00177 */ 00178 template<typename _Facet> 00179 locale(const locale& __other, _Facet* __f); 00180 00181 /// Locale destructor. 00182 ~locale() throw(); 00183 00184 /** 00185 * @brief Assignment operator. 00186 * 00187 * Set this locale to be a copy of @a other. 00188 * 00189 * @param other The locale to copy. 00190 * @return A reference to this locale. 00191 */ 00192 const locale& 00193 operator=(const locale& __other) throw(); 00194 00195 /** 00196 * @brief Construct locale with another facet. 00197 * 00198 * Constructs and returns a new copy of this locale. Adds or replaces an 00199 * existing facet of type Facet from the locale @a other into the new 00200 * locale. 00201 * 00202 * @param Facet The facet type to copy from other 00203 * @param other The locale to copy from. 00204 * @return Newly constructed locale. 00205 * @throw std::runtime_error if other has no facet of type Facet. 00206 */ 00207 template<typename _Facet> 00208 locale 00209 combine(const locale& __other) const; 00210 00211 // Locale operations: 00212 /** 00213 * @brief Return locale name. 00214 * @return Locale name or "*" if unnamed. 00215 */ 00216 string 00217 name() const; 00218 00219 /** 00220 * @brief Locale equality. 00221 * 00222 * @param other The locale to compare against. 00223 * @return True if other and this refer to the same locale instance, are 00224 * copies, or have the same name. False otherwise. 00225 */ 00226 bool 00227 operator==(const locale& __other) const throw(); 00228 00229 /** 00230 * @brief Locale inequality. 00231 * 00232 * @param other The locale to compare against. 00233 * @return ! (*this == other) 00234 */ 00235 bool 00236 operator!=(const locale& __other) const throw() 00237 { return !(this->operator==(__other)); } 00238 00239 /** 00240 * @brief Compare two strings according to collate. 00241 * 00242 * Template operator to compare two strings using the compare function of 00243 * the collate facet in this locale. One use is to provide the locale to 00244 * the sort function. For example, a vector v of strings could be sorted 00245 * according to locale loc by doing: 00246 * @code 00247 * std::sort(v.begin(), v.end(), loc); 00248 * @endcode 00249 * 00250 * @param s1 First string to compare. 00251 * @param s2 Second string to compare. 00252 * @return True if collate<Char> facet compares s1 < s2, else false. 00253 */ 00254 template<typename _Char, typename _Traits, typename _Alloc> 00255 bool 00256 operator()(const basic_string<_Char, _Traits, _Alloc>& __s1, 00257 const basic_string<_Char, _Traits, _Alloc>& __s2) const; 00258 00259 // Global locale objects: 00260 /** 00261 * @brief Set global locale 00262 * 00263 * This function sets the global locale to the argument and returns a 00264 * copy of the previous global locale. If the argument has a name, it 00265 * will also call std::setlocale(LC_ALL, loc.name()). 00266 * 00267 * @param locale The new locale to make global. 00268 * @return Copy of the old global locale. 00269 */ 00270 static locale 00271 global(const locale&); 00272 00273 /** 00274 * @brief Return reference to the C locale. 00275 */ 00276 static const locale& 00277 classic(); 00278 00279 private: 00280 // The (shared) implementation 00281 _Impl* _M_impl; 00282 00283 // The "C" reference locale 00284 static _Impl* _S_classic; 00285 00286 // Current global locale 00287 static _Impl* _S_global; 00288 00289 // Names of underlying locale categories. 00290 // NB: locale::global() has to know how to modify all the 00291 // underlying categories, not just the ones required by the C++ 00292 // standard. 00293 static const char* const* const _S_categories; 00294 00295 // Number of standard categories. For C++, these categories are 00296 // collate, ctype, monetary, numeric, time, and messages. These 00297 // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE, 00298 // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE 00299 // 1003.1-2001) specifies LC_MESSAGES. 00300 // In addition to the standard categories, the underlying 00301 // operating system is allowed to define extra LC_* 00302 // macros. For GNU systems, the following are also valid: 00303 // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, 00304 // and LC_IDENTIFICATION. 00305 enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES }; 00306 00307 #ifdef __GTHREADS 00308 static __gthread_once_t _S_once; 00309 #endif 00310 00311 explicit 00312 locale(_Impl*) throw(); 00313 00314 static void 00315 _S_initialize(); 00316 00317 static void 00318 _S_initialize_once() throw(); 00319 00320 static category 00321 _S_normalize_category(category); 00322 00323 void 00324 _M_coalesce(const locale& __base, const locale& __add, category __cat); 00325 }; 00326 00327 00328 // 22.1.1.1.2 Class locale::facet 00329 /** 00330 * @brief Localization functionality base class. 00331 * @ingroup locales 00332 * 00333 * The facet class is the base class for a localization feature, such as 00334 * money, time, and number printing. It provides common support for facets 00335 * and reference management. 00336 * 00337 * Facets may not be copied or assigned. 00338 */ 00339 class locale::facet 00340 { 00341 private: 00342 friend class locale; 00343 friend class locale::_Impl; 00344 00345 mutable _Atomic_word _M_refcount; 00346 00347 // Contains data from the underlying "C" library for the classic locale. 00348 static __c_locale _S_c_locale; 00349 00350 // String literal for the name of the classic locale. 00351 static const char _S_c_name[2]; 00352 00353 #ifdef __GTHREADS 00354 static __gthread_once_t _S_once; 00355 #endif 00356 00357 static void 00358 _S_initialize_once(); 00359 00360 protected: 00361 /** 00362 * @brief Facet constructor. 00363 * 00364 * This is the constructor provided by the standard. If refs is 0, the 00365 * facet is destroyed when the last referencing locale is destroyed. 00366 * Otherwise the facet will never be destroyed. 00367 * 00368 * @param refs The initial value for reference count. 00369 */ 00370 explicit 00371 facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0) 00372 { } 00373 00374 /// Facet destructor. 00375 virtual 00376 ~facet(); 00377 00378 static void 00379 _S_create_c_locale(__c_locale& __cloc, const char* __s, 00380 __c_locale __old = 0); 00381 00382 static __c_locale 00383 _S_clone_c_locale(__c_locale& __cloc) throw(); 00384 00385 static void 00386 _S_destroy_c_locale(__c_locale& __cloc); 00387 00388 static __c_locale 00389 _S_lc_ctype_c_locale(__c_locale __cloc, const char* __s); 00390 00391 // Returns data from the underlying "C" library data for the 00392 // classic locale. 00393 static __c_locale 00394 _S_get_c_locale(); 00395 00396 _GLIBCXX_CONST static const char* 00397 _S_get_c_name() throw(); 00398 00399 private: 00400 void 00401 _M_add_reference() const throw() 00402 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00403 00404 void 00405 _M_remove_reference() const throw() 00406 { 00407 // Be race-detector-friendly. For more info see bits/c++config. 00408 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount); 00409 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00410 { 00411 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount); 00412 __try 00413 { delete this; } 00414 __catch(...) 00415 { } 00416 } 00417 } 00418 00419 facet(const facet&); // Not defined. 00420 00421 facet& 00422 operator=(const facet&); // Not defined. 00423 }; 00424 00425 00426 // 22.1.1.1.3 Class locale::id 00427 /** 00428 * @brief Facet ID class. 00429 * @ingroup locales 00430 * 00431 * The ID class provides facets with an index used to identify them. 00432 * Every facet class must define a public static member locale::id, or be 00433 * derived from a facet that provides this member, otherwise the facet 00434 * cannot be used in a locale. The locale::id ensures that each class 00435 * type gets a unique identifier. 00436 */ 00437 class locale::id 00438 { 00439 private: 00440 friend class locale; 00441 friend class locale::_Impl; 00442 00443 template<typename _Facet> 00444 friend const _Facet& 00445 use_facet(const locale&); 00446 00447 template<typename _Facet> 00448 friend bool 00449 has_facet(const locale&) throw(); 00450 00451 // NB: There is no accessor for _M_index because it may be used 00452 // before the constructor is run; the effect of calling a member 00453 // function (even an inline) would be undefined. 00454 mutable size_t _M_index; 00455 00456 // Last id number assigned. 00457 static _Atomic_word _S_refcount; 00458 00459 void 00460 operator=(const id&); // Not defined. 00461 00462 id(const id&); // Not defined. 00463 00464 public: 00465 // NB: This class is always a static data member, and thus can be 00466 // counted on to be zero-initialized. 00467 /// Constructor. 00468 id() { } 00469 00470 size_t 00471 _M_id() const throw(); 00472 }; 00473 00474 00475 // Implementation object for locale. 00476 class locale::_Impl 00477 { 00478 public: 00479 // Friends. 00480 friend class locale; 00481 friend class locale::facet; 00482 00483 template<typename _Facet> 00484 friend bool 00485 has_facet(const locale&) throw(); 00486 00487 template<typename _Facet> 00488 friend const _Facet& 00489 use_facet(const locale&); 00490 00491 template<typename _Cache> 00492 friend struct __use_cache; 00493 00494 private: 00495 // Data Members. 00496 _Atomic_word _M_refcount; 00497 const facet** _M_facets; 00498 size_t _M_facets_size; 00499 const facet** _M_caches; 00500 char** _M_names; 00501 static const locale::id* const _S_id_ctype[]; 00502 static const locale::id* const _S_id_numeric[]; 00503 static const locale::id* const _S_id_collate[]; 00504 static const locale::id* const _S_id_time[]; 00505 static const locale::id* const _S_id_monetary[]; 00506 static const locale::id* const _S_id_messages[]; 00507 static const locale::id* const* const _S_facet_categories[]; 00508 00509 void 00510 _M_add_reference() throw() 00511 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00512 00513 void 00514 _M_remove_reference() throw() 00515 { 00516 // Be race-detector-friendly. For more info see bits/c++config. 00517 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount); 00518 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00519 { 00520 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount); 00521 __try 00522 { delete this; } 00523 __catch(...) 00524 { } 00525 } 00526 } 00527 00528 _Impl(const _Impl&, size_t); 00529 _Impl(const char*, size_t); 00530 _Impl(size_t) throw(); 00531 00532 ~_Impl() throw(); 00533 00534 _Impl(const _Impl&); // Not defined. 00535 00536 void 00537 operator=(const _Impl&); // Not defined. 00538 00539 bool 00540 _M_check_same_name() 00541 { 00542 bool __ret = true; 00543 if (_M_names[1]) 00544 // We must actually compare all the _M_names: can be all equal! 00545 for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i) 00546 __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0; 00547 return __ret; 00548 } 00549 00550 void 00551 _M_replace_categories(const _Impl*, category); 00552 00553 void 00554 _M_replace_category(const _Impl*, const locale::id* const*); 00555 00556 void 00557 _M_replace_facet(const _Impl*, const locale::id*); 00558 00559 void 00560 _M_install_facet(const locale::id*, const facet*); 00561 00562 template<typename _Facet> 00563 void 00564 _M_init_facet(_Facet* __facet) 00565 { _M_install_facet(&_Facet::id, __facet); } 00566 00567 void 00568 _M_install_cache(const facet*, size_t); 00569 }; 00570 00571 00572 /** 00573 * @brief Test for the presence of a facet. 00574 * 00575 * has_facet tests the locale argument for the presence of the facet type 00576 * provided as the template parameter. Facets derived from the facet 00577 * parameter will also return true. 00578 * 00579 * @param Facet The facet type to test the presence of. 00580 * @param locale The locale to test. 00581 * @return true if locale contains a facet of type Facet, else false. 00582 */ 00583 template<typename _Facet> 00584 bool 00585 has_facet(const locale& __loc) throw(); 00586 00587 /** 00588 * @brief Return a facet. 00589 * 00590 * use_facet looks for and returns a reference to a facet of type Facet 00591 * where Facet is the template parameter. If has_facet(locale) is true, 00592 * there is a suitable facet to return. It throws std::bad_cast if the 00593 * locale doesn't contain a facet of type Facet. 00594 * 00595 * @param Facet The facet type to access. 00596 * @param locale The locale to use. 00597 * @return Reference to facet of type Facet. 00598 * @throw std::bad_cast if locale doesn't contain a facet of type Facet. 00599 */ 00600 template<typename _Facet> 00601 const _Facet& 00602 use_facet(const locale& __loc); 00603 00604 00605 /** 00606 * @brief Facet for localized string comparison. 00607 * 00608 * This facet encapsulates the code to compare strings in a localized 00609 * manner. 00610 * 00611 * The collate template uses protected virtual functions to provide 00612 * the actual results. The public accessors forward the call to 00613 * the virtual functions. These virtual functions are hooks for 00614 * developers to implement the behavior they require from the 00615 * collate facet. 00616 */ 00617 template<typename _CharT> 00618 class collate : public locale::facet 00619 { 00620 public: 00621 // Types: 00622 //@{ 00623 /// Public typedefs 00624 typedef _CharT char_type; 00625 typedef basic_string<_CharT> string_type; 00626 //@} 00627 00628 protected: 00629 // Underlying "C" library locale information saved from 00630 // initialization, needed by collate_byname as well. 00631 __c_locale _M_c_locale_collate; 00632 00633 public: 00634 /// Numpunct facet id. 00635 static locale::id id; 00636 00637 /** 00638 * @brief Constructor performs initialization. 00639 * 00640 * This is the constructor provided by the standard. 00641 * 00642 * @param refs Passed to the base facet class. 00643 */ 00644 explicit 00645 collate(size_t __refs = 0) 00646 : facet(__refs), _M_c_locale_collate(_S_get_c_locale()) 00647 { } 00648 00649 /** 00650 * @brief Internal constructor. Not for general use. 00651 * 00652 * This is a constructor for use by the library itself to set up new 00653 * locales. 00654 * 00655 * @param cloc The C locale. 00656 * @param refs Passed to the base facet class. 00657 */ 00658 explicit 00659 collate(__c_locale __cloc, size_t __refs = 0) 00660 : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc)) 00661 { } 00662 00663 /** 00664 * @brief Compare two strings. 00665 * 00666 * This function compares two strings and returns the result by calling 00667 * collate::do_compare(). 00668 * 00669 * @param lo1 Start of string 1. 00670 * @param hi1 End of string 1. 00671 * @param lo2 Start of string 2. 00672 * @param hi2 End of string 2. 00673 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00674 */ 00675 int 00676 compare(const _CharT* __lo1, const _CharT* __hi1, 00677 const _CharT* __lo2, const _CharT* __hi2) const 00678 { return this->do_compare(__lo1, __hi1, __lo2, __hi2); } 00679 00680 /** 00681 * @brief Transform string to comparable form. 00682 * 00683 * This function is a wrapper for strxfrm functionality. It takes the 00684 * input string and returns a modified string that can be directly 00685 * compared to other transformed strings. In the C locale, this 00686 * function just returns a copy of the input string. In some other 00687 * locales, it may replace two chars with one, change a char for 00688 * another, etc. It does so by returning collate::do_transform(). 00689 * 00690 * @param lo Start of string. 00691 * @param hi End of string. 00692 * @return Transformed string_type. 00693 */ 00694 string_type 00695 transform(const _CharT* __lo, const _CharT* __hi) const 00696 { return this->do_transform(__lo, __hi); } 00697 00698 /** 00699 * @brief Return hash of a string. 00700 * 00701 * This function computes and returns a hash on the input string. It 00702 * does so by returning collate::do_hash(). 00703 * 00704 * @param lo Start of string. 00705 * @param hi End of string. 00706 * @return Hash value. 00707 */ 00708 long 00709 hash(const _CharT* __lo, const _CharT* __hi) const 00710 { return this->do_hash(__lo, __hi); } 00711 00712 // Used to abstract out _CharT bits in virtual member functions, below. 00713 int 00714 _M_compare(const _CharT*, const _CharT*) const throw(); 00715 00716 size_t 00717 _M_transform(_CharT*, const _CharT*, size_t) const throw(); 00718 00719 protected: 00720 /// Destructor. 00721 virtual 00722 ~collate() 00723 { _S_destroy_c_locale(_M_c_locale_collate); } 00724 00725 /** 00726 * @brief Compare two strings. 00727 * 00728 * This function is a hook for derived classes to change the value 00729 * returned. @see compare(). 00730 * 00731 * @param lo1 Start of string 1. 00732 * @param hi1 End of string 1. 00733 * @param lo2 Start of string 2. 00734 * @param hi2 End of string 2. 00735 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00736 */ 00737 virtual int 00738 do_compare(const _CharT* __lo1, const _CharT* __hi1, 00739 const _CharT* __lo2, const _CharT* __hi2) const; 00740 00741 /** 00742 * @brief Transform string to comparable form. 00743 * 00744 * This function is a hook for derived classes to change the value 00745 * returned. 00746 * 00747 * @param lo1 Start of string 1. 00748 * @param hi1 End of string 1. 00749 * @param lo2 Start of string 2. 00750 * @param hi2 End of string 2. 00751 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00752 */ 00753 virtual string_type 00754 do_transform(const _CharT* __lo, const _CharT* __hi) const; 00755 00756 /** 00757 * @brief Return hash of a string. 00758 * 00759 * This function computes and returns a hash on the input string. This 00760 * function is a hook for derived classes to change the value returned. 00761 * 00762 * @param lo Start of string. 00763 * @param hi End of string. 00764 * @return Hash value. 00765 */ 00766 virtual long 00767 do_hash(const _CharT* __lo, const _CharT* __hi) const; 00768 }; 00769 00770 template<typename _CharT> 00771 locale::id collate<_CharT>::id; 00772 00773 // Specializations. 00774 template<> 00775 int 00776 collate<char>::_M_compare(const char*, const char*) const throw(); 00777 00778 template<> 00779 size_t 00780 collate<char>::_M_transform(char*, const char*, size_t) const throw(); 00781 00782 #ifdef _GLIBCXX_USE_WCHAR_T 00783 template<> 00784 int 00785 collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const throw(); 00786 00787 template<> 00788 size_t 00789 collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const throw(); 00790 #endif 00791 00792 /// class collate_byname [22.2.4.2]. 00793 template<typename _CharT> 00794 class collate_byname : public collate<_CharT> 00795 { 00796 public: 00797 //@{ 00798 /// Public typedefs 00799 typedef _CharT char_type; 00800 typedef basic_string<_CharT> string_type; 00801 //@} 00802 00803 explicit 00804 collate_byname(const char* __s, size_t __refs = 0) 00805 : collate<_CharT>(__refs) 00806 { 00807 if (__builtin_strcmp(__s, "C") != 0 00808 && __builtin_strcmp(__s, "POSIX") != 0) 00809 { 00810 this->_S_destroy_c_locale(this->_M_c_locale_collate); 00811 this->_S_create_c_locale(this->_M_c_locale_collate, __s); 00812 } 00813 } 00814 00815 protected: 00816 virtual 00817 ~collate_byname() { } 00818 }; 00819 00820 _GLIBCXX_END_NAMESPACE_VERSION 00821 } // namespace 00822 00823 # include <bits/locale_classes.tcc> 00824 00825 #endif