locale_facets.h

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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_facets.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_FACETS_H
00037 #define _LOCALE_FACETS_H 1
00038 
00039 #pragma GCC system_header
00040 
00041 #include <cwctype>  // For wctype_t
00042 #include <cctype>
00043 #include <bits/ctype_base.h>    
00044 #include <iosfwd>
00045 #include <bits/ios_base.h>  // For ios_base, ios_base::iostate
00046 #include <streambuf>
00047 #include <bits/cpp_type_traits.h>
00048 #include <ext/type_traits.h>
00049 #include <ext/numeric_traits.h>
00050 #include <bits/streambuf_iterator.h>
00051 
00052 _GLIBCXX_BEGIN_NAMESPACE(std)
00053 
00054   // NB: Don't instantiate required wchar_t facets if no wchar_t support.
00055 #ifdef _GLIBCXX_USE_WCHAR_T
00056 # define  _GLIBCXX_NUM_FACETS 28
00057 #else
00058 # define  _GLIBCXX_NUM_FACETS 14
00059 #endif
00060 
00061   // Convert string to numeric value of type _Tv and store results.
00062   // NB: This is specialized for all required types, there is no
00063   // generic definition.
00064   template<typename _Tv>
00065     void
00066     __convert_to_v(const char* __in, _Tv& __out, ios_base::iostate& __err,
00067            const __c_locale& __cloc);
00068 
00069   // Explicit specializations for required types.
00070   template<>
00071     void
00072     __convert_to_v(const char*, float&, ios_base::iostate&,
00073            const __c_locale&);
00074 
00075   template<>
00076     void
00077     __convert_to_v(const char*, double&, ios_base::iostate&,
00078            const __c_locale&);
00079 
00080   template<>
00081     void
00082     __convert_to_v(const char*, long double&, ios_base::iostate&,
00083            const __c_locale&);
00084 
00085   // NB: __pad is a struct, rather than a function, so it can be
00086   // partially-specialized.
00087   template<typename _CharT, typename _Traits>
00088     struct __pad
00089     {
00090       static void
00091       _S_pad(ios_base& __io, _CharT __fill, _CharT* __news,
00092          const _CharT* __olds, streamsize __newlen, streamsize __oldlen);
00093     };
00094 
00095   // Used by both numeric and monetary facets.
00096   // Inserts "group separator" characters into an array of characters.
00097   // It's recursive, one iteration per group.  It moves the characters
00098   // in the buffer this way: "xxxx12345" -> "12,345xxx".  Call this
00099   // only with __gsize != 0.
00100   template<typename _CharT>
00101     _CharT*
00102     __add_grouping(_CharT* __s, _CharT __sep,
00103            const char* __gbeg, size_t __gsize,
00104            const _CharT* __first, const _CharT* __last);
00105 
00106   // This template permits specializing facet output code for
00107   // ostreambuf_iterator.  For ostreambuf_iterator, sputn is
00108   // significantly more efficient than incrementing iterators.
00109   template<typename _CharT>
00110     inline
00111     ostreambuf_iterator<_CharT>
00112     __write(ostreambuf_iterator<_CharT> __s, const _CharT* __ws, int __len)
00113     {
00114       __s._M_put(__ws, __len);
00115       return __s;
00116     }
00117 
00118   // This is the unspecialized form of the template.
00119   template<typename _CharT, typename _OutIter>
00120     inline
00121     _OutIter
00122     __write(_OutIter __s, const _CharT* __ws, int __len)
00123     {
00124       for (int __j = 0; __j < __len; __j++, ++__s)
00125     *__s = __ws[__j];
00126       return __s;
00127     }
00128 
00129 
00130   // 22.2.1.1  Template class ctype
00131   // Include host and configuration specific ctype enums for ctype_base.
00132 
00133   // Common base for ctype<_CharT>.
00134   /**
00135    *  @brief  Common base for ctype facet
00136    *
00137    *  This template class provides implementations of the public functions
00138    *  that forward to the protected virtual functions.
00139    *
00140    *  This template also provides abstract stubs for the protected virtual
00141    *  functions.
00142   */
00143   template<typename _CharT>
00144     class __ctype_abstract_base : public locale::facet, public ctype_base
00145     {
00146     public:
00147       // Types:
00148       /// Typedef for the template parameter
00149       typedef _CharT char_type;
00150 
00151       /**
00152        *  @brief  Test char_type classification.
00153        *
00154        *  This function finds a mask M for @a c and compares it to mask @a m.
00155        *  It does so by returning the value of ctype<char_type>::do_is().
00156        *
00157        *  @param c  The char_type to compare the mask of.
00158        *  @param m  The mask to compare against.
00159        *  @return  (M & m) != 0.
00160       */
00161       bool
00162       is(mask __m, char_type __c) const
00163       { return this->do_is(__m, __c); }
00164 
00165       /**
00166        *  @brief  Return a mask array.
00167        *
00168        *  This function finds the mask for each char_type in the range [lo,hi)
00169        *  and successively writes it to vec.  vec must have as many elements
00170        *  as the char array.  It does so by returning the value of
00171        *  ctype<char_type>::do_is().
00172        *
00173        *  @param lo  Pointer to start of range.
00174        *  @param hi  Pointer to end of range.
00175        *  @param vec  Pointer to an array of mask storage.
00176        *  @return  @a hi.
00177       */
00178       const char_type*
00179       is(const char_type *__lo, const char_type *__hi, mask *__vec) const
00180       { return this->do_is(__lo, __hi, __vec); }
00181 
00182       /**
00183        *  @brief  Find char_type matching a mask
00184        *
00185        *  This function searches for and returns the first char_type c in
00186        *  [lo,hi) for which is(m,c) is true.  It does so by returning
00187        *  ctype<char_type>::do_scan_is().
00188        *
00189        *  @param m  The mask to compare against.
00190        *  @param lo  Pointer to start of range.
00191        *  @param hi  Pointer to end of range.
00192        *  @return  Pointer to matching char_type if found, else @a hi.
00193       */
00194       const char_type*
00195       scan_is(mask __m, const char_type* __lo, const char_type* __hi) const
00196       { return this->do_scan_is(__m, __lo, __hi); }
00197 
00198       /**
00199        *  @brief  Find char_type not matching a mask
00200        *
00201        *  This function searches for and returns the first char_type c in
00202        *  [lo,hi) for which is(m,c) is false.  It does so by returning
00203        *  ctype<char_type>::do_scan_not().
00204        *
00205        *  @param m  The mask to compare against.
00206        *  @param lo  Pointer to first char in range.
00207        *  @param hi  Pointer to end of range.
00208        *  @return  Pointer to non-matching char if found, else @a hi.
00209       */
00210       const char_type*
00211       scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
00212       { return this->do_scan_not(__m, __lo, __hi); }
00213 
00214       /**
00215        *  @brief  Convert to uppercase.
00216        *
00217        *  This function converts the argument to uppercase if possible.
00218        *  If not possible (for example, '2'), returns the argument.  It does
00219        *  so by returning ctype<char_type>::do_toupper().
00220        *
00221        *  @param c  The char_type to convert.
00222        *  @return  The uppercase char_type if convertible, else @a c.
00223       */
00224       char_type
00225       toupper(char_type __c) const
00226       { return this->do_toupper(__c); }
00227 
00228       /**
00229        *  @brief  Convert array to uppercase.
00230        *
00231        *  This function converts each char_type in the range [lo,hi) to
00232        *  uppercase if possible.  Other elements remain untouched.  It does so
00233        *  by returning ctype<char_type>:: do_toupper(lo, hi).
00234        *
00235        *  @param lo  Pointer to start of range.
00236        *  @param hi  Pointer to end of range.
00237        *  @return  @a hi.
00238       */
00239       const char_type*
00240       toupper(char_type *__lo, const char_type* __hi) const
00241       { return this->do_toupper(__lo, __hi); }
00242 
00243       /**
00244        *  @brief  Convert to lowercase.
00245        *
00246        *  This function converts the argument to lowercase if possible.  If
00247        *  not possible (for example, '2'), returns the argument.  It does so
00248        *  by returning ctype<char_type>::do_tolower(c).
00249        *
00250        *  @param c  The char_type to convert.
00251        *  @return  The lowercase char_type if convertible, else @a c.
00252       */
00253       char_type
00254       tolower(char_type __c) const
00255       { return this->do_tolower(__c); }
00256 
00257       /**
00258        *  @brief  Convert array to lowercase.
00259        *
00260        *  This function converts each char_type in the range [lo,hi) to
00261        *  lowercase if possible.  Other elements remain untouched.  It does so
00262        *  by returning ctype<char_type>:: do_tolower(lo, hi).
00263        *
00264        *  @param lo  Pointer to start of range.
00265        *  @param hi  Pointer to end of range.
00266        *  @return  @a hi.
00267       */
00268       const char_type*
00269       tolower(char_type* __lo, const char_type* __hi) const
00270       { return this->do_tolower(__lo, __hi); }
00271 
00272       /**
00273        *  @brief  Widen char to char_type
00274        *
00275        *  This function converts the char argument to char_type using the
00276        *  simplest reasonable transformation.  It does so by returning
00277        *  ctype<char_type>::do_widen(c).
00278        *
00279        *  Note: this is not what you want for codepage conversions.  See
00280        *  codecvt for that.
00281        *
00282        *  @param c  The char to convert.
00283        *  @return  The converted char_type.
00284       */
00285       char_type
00286       widen(char __c) const
00287       { return this->do_widen(__c); }
00288 
00289       /**
00290        *  @brief  Widen array to char_type
00291        *
00292        *  This function converts each char in the input to char_type using the
00293        *  simplest reasonable transformation.  It does so by returning
00294        *  ctype<char_type>::do_widen(c).
00295        *
00296        *  Note: this is not what you want for codepage conversions.  See
00297        *  codecvt for that.
00298        *
00299        *  @param lo  Pointer to start of range.
00300        *  @param hi  Pointer to end of range.
00301        *  @param to  Pointer to the destination array.
00302        *  @return  @a hi.
00303       */
00304       const char*
00305       widen(const char* __lo, const char* __hi, char_type* __to) const
00306       { return this->do_widen(__lo, __hi, __to); }
00307 
00308       /**
00309        *  @brief  Narrow char_type to char
00310        *
00311        *  This function converts the char_type to char using the simplest
00312        *  reasonable transformation.  If the conversion fails, dfault is
00313        *  returned instead.  It does so by returning
00314        *  ctype<char_type>::do_narrow(c).
00315        *
00316        *  Note: this is not what you want for codepage conversions.  See
00317        *  codecvt for that.
00318        *
00319        *  @param c  The char_type to convert.
00320        *  @param dfault  Char to return if conversion fails.
00321        *  @return  The converted char.
00322       */
00323       char
00324       narrow(char_type __c, char __dfault) const
00325       { return this->do_narrow(__c, __dfault); }
00326 
00327       /**
00328        *  @brief  Narrow array to char array
00329        *
00330        *  This function converts each char_type in the input to char using the
00331        *  simplest reasonable transformation and writes the results to the
00332        *  destination array.  For any char_type in the input that cannot be
00333        *  converted, @a dfault is used instead.  It does so by returning
00334        *  ctype<char_type>::do_narrow(lo, hi, dfault, to).
00335        *
00336        *  Note: this is not what you want for codepage conversions.  See
00337        *  codecvt for that.
00338        *
00339        *  @param lo  Pointer to start of range.
00340        *  @param hi  Pointer to end of range.
00341        *  @param dfault  Char to use if conversion fails.
00342        *  @param to  Pointer to the destination array.
00343        *  @return  @a hi.
00344       */
00345       const char_type*
00346       narrow(const char_type* __lo, const char_type* __hi,
00347           char __dfault, char *__to) const
00348       { return this->do_narrow(__lo, __hi, __dfault, __to); }
00349 
00350     protected:
00351       explicit
00352       __ctype_abstract_base(size_t __refs = 0): facet(__refs) { }
00353 
00354       virtual
00355       ~__ctype_abstract_base() { }
00356 
00357       /**
00358        *  @brief  Test char_type classification.
00359        *
00360        *  This function finds a mask M for @a c and compares it to mask @a m.
00361        *
00362        *  do_is() is a hook for a derived facet to change the behavior of
00363        *  classifying.  do_is() must always return the same result for the
00364        *  same input.
00365        *
00366        *  @param c  The char_type to find the mask of.
00367        *  @param m  The mask to compare against.
00368        *  @return  (M & m) != 0.
00369       */
00370       virtual bool
00371       do_is(mask __m, char_type __c) const = 0;
00372 
00373       /**
00374        *  @brief  Return a mask array.
00375        *
00376        *  This function finds the mask for each char_type in the range [lo,hi)
00377        *  and successively writes it to vec.  vec must have as many elements
00378        *  as the input.
00379        *
00380        *  do_is() is a hook for a derived facet to change the behavior of
00381        *  classifying.  do_is() must always return the same result for the
00382        *  same input.
00383        *
00384        *  @param lo  Pointer to start of range.
00385        *  @param hi  Pointer to end of range.
00386        *  @param vec  Pointer to an array of mask storage.
00387        *  @return  @a hi.
00388       */
00389       virtual const char_type*
00390       do_is(const char_type* __lo, const char_type* __hi,
00391         mask* __vec) const = 0;
00392 
00393       /**
00394        *  @brief  Find char_type matching mask
00395        *
00396        *  This function searches for and returns the first char_type c in
00397        *  [lo,hi) for which is(m,c) is true.
00398        *
00399        *  do_scan_is() is a hook for a derived facet to change the behavior of
00400        *  match searching.  do_is() must always return the same result for the
00401        *  same input.
00402        *
00403        *  @param m  The mask to compare against.
00404        *  @param lo  Pointer to start of range.
00405        *  @param hi  Pointer to end of range.
00406        *  @return  Pointer to a matching char_type if found, else @a hi.
00407       */
00408       virtual const char_type*
00409       do_scan_is(mask __m, const char_type* __lo,
00410          const char_type* __hi) const = 0;
00411 
00412       /**
00413        *  @brief  Find char_type not matching mask
00414        *
00415        *  This function searches for and returns a pointer to the first
00416        *  char_type c of [lo,hi) for which is(m,c) is false.
00417        *
00418        *  do_scan_is() is a hook for a derived facet to change the behavior of
00419        *  match searching.  do_is() must always return the same result for the
00420        *  same input.
00421        *
00422        *  @param m  The mask to compare against.
00423        *  @param lo  Pointer to start of range.
00424        *  @param hi  Pointer to end of range.
00425        *  @return  Pointer to a non-matching char_type if found, else @a hi.
00426       */
00427       virtual const char_type*
00428       do_scan_not(mask __m, const char_type* __lo,
00429           const char_type* __hi) const = 0;
00430 
00431       /**
00432        *  @brief  Convert to uppercase.
00433        *
00434        *  This virtual function converts the char_type argument to uppercase
00435        *  if possible.  If not possible (for example, '2'), returns the
00436        *  argument.
00437        *
00438        *  do_toupper() is a hook for a derived facet to change the behavior of
00439        *  uppercasing.  do_toupper() must always return the same result for
00440        *  the same input.
00441        *
00442        *  @param c  The char_type to convert.
00443        *  @return  The uppercase char_type if convertible, else @a c.
00444       */
00445       virtual char_type
00446       do_toupper(char_type) const = 0;
00447 
00448       /**
00449        *  @brief  Convert array to uppercase.
00450        *
00451        *  This virtual function converts each char_type in the range [lo,hi)
00452        *  to uppercase if possible.  Other elements remain untouched.
00453        *
00454        *  do_toupper() is a hook for a derived facet to change the behavior of
00455        *  uppercasing.  do_toupper() must always return the same result for
00456        *  the same input.
00457        *
00458        *  @param lo  Pointer to start of range.
00459        *  @param hi  Pointer to end of range.
00460        *  @return  @a hi.
00461       */
00462       virtual const char_type*
00463       do_toupper(char_type* __lo, const char_type* __hi) const = 0;
00464 
00465       /**
00466        *  @brief  Convert to lowercase.
00467        *
00468        *  This virtual function converts the argument to lowercase if
00469        *  possible.  If not possible (for example, '2'), returns the argument.
00470        *
00471        *  do_tolower() is a hook for a derived facet to change the behavior of
00472        *  lowercasing.  do_tolower() must always return the same result for
00473        *  the same input.
00474        *
00475        *  @param c  The char_type to convert.
00476        *  @return  The lowercase char_type if convertible, else @a c.
00477       */
00478       virtual char_type
00479       do_tolower(char_type) const = 0;
00480 
00481       /**
00482        *  @brief  Convert array to lowercase.
00483        *
00484        *  This virtual function converts each char_type in the range [lo,hi)
00485        *  to lowercase if possible.  Other elements remain untouched.
00486        *
00487        *  do_tolower() is a hook for a derived facet to change the behavior of
00488        *  lowercasing.  do_tolower() must always return the same result for
00489        *  the same input.
00490        *
00491        *  @param lo  Pointer to start of range.
00492        *  @param hi  Pointer to end of range.
00493        *  @return  @a hi.
00494       */
00495       virtual const char_type*
00496       do_tolower(char_type* __lo, const char_type* __hi) const = 0;
00497 
00498       /**
00499        *  @brief  Widen char
00500        *
00501        *  This virtual function converts the char to char_type using the
00502        *  simplest reasonable transformation.
00503        *
00504        *  do_widen() is a hook for a derived facet to change the behavior of
00505        *  widening.  do_widen() must always return the same result for the
00506        *  same input.
00507        *
00508        *  Note: this is not what you want for codepage conversions.  See
00509        *  codecvt for that.
00510        *
00511        *  @param c  The char to convert.
00512        *  @return  The converted char_type
00513       */
00514       virtual char_type
00515       do_widen(char) const = 0;
00516 
00517       /**
00518        *  @brief  Widen char array
00519        *
00520        *  This function converts each char in the input to char_type using the
00521        *  simplest reasonable transformation.
00522        *
00523        *  do_widen() is a hook for a derived facet to change the behavior of
00524        *  widening.  do_widen() must always return the same result for the
00525        *  same input.
00526        *
00527        *  Note: this is not what you want for codepage conversions.  See
00528        *  codecvt for that.
00529        *
00530        *  @param lo  Pointer to start range.
00531        *  @param hi  Pointer to end of range.
00532        *  @param to  Pointer to the destination array.
00533        *  @return  @a hi.
00534       */
00535       virtual const char*
00536       do_widen(const char* __lo, const char* __hi,
00537            char_type* __dest) const = 0;
00538 
00539       /**
00540        *  @brief  Narrow char_type to char
00541        *
00542        *  This virtual function converts the argument to char using the
00543        *  simplest reasonable transformation.  If the conversion fails, dfault
00544        *  is returned instead.
00545        *
00546        *  do_narrow() is a hook for a derived facet to change the behavior of
00547        *  narrowing.  do_narrow() must always return the same result for the
00548        *  same input.
00549        *
00550        *  Note: this is not what you want for codepage conversions.  See
00551        *  codecvt for that.
00552        *
00553        *  @param c  The char_type to convert.
00554        *  @param dfault  Char to return if conversion fails.
00555        *  @return  The converted char.
00556       */
00557       virtual char
00558       do_narrow(char_type, char __dfault) const = 0;
00559 
00560       /**
00561        *  @brief  Narrow char_type array to char
00562        *
00563        *  This virtual function converts each char_type in the range [lo,hi) to
00564        *  char using the simplest reasonable transformation and writes the
00565        *  results to the destination array.  For any element in the input that
00566        *  cannot be converted, @a dfault is used instead.
00567        *
00568        *  do_narrow() is a hook for a derived facet to change the behavior of
00569        *  narrowing.  do_narrow() must always return the same result for the
00570        *  same input.
00571        *
00572        *  Note: this is not what you want for codepage conversions.  See
00573        *  codecvt for that.
00574        *
00575        *  @param lo  Pointer to start of range.
00576        *  @param hi  Pointer to end of range.
00577        *  @param dfault  Char to use if conversion fails.
00578        *  @param to  Pointer to the destination array.
00579        *  @return  @a hi.
00580       */
00581       virtual const char_type*
00582       do_narrow(const char_type* __lo, const char_type* __hi,
00583         char __dfault, char* __dest) const = 0;
00584     };
00585 
00586   // NB: Generic, mostly useless implementation.
00587   /**
00588    *  @brief  Template ctype facet
00589    *
00590    *  This template class defines classification and conversion functions for
00591    *  character sets.  It wraps <cctype> functionality.  Ctype gets used by
00592    *  streams for many I/O operations.
00593    *
00594    *  This template provides the protected virtual functions the developer
00595    *  will have to replace in a derived class or specialization to make a
00596    *  working facet.  The public functions that access them are defined in
00597    *  __ctype_abstract_base, to allow for implementation flexibility.  See
00598    *  ctype<wchar_t> for an example.  The functions are documented in
00599    *  __ctype_abstract_base.
00600    *
00601    *  Note: implementations are provided for all the protected virtual
00602    *  functions, but will likely not be useful.
00603   */
00604   template<typename _CharT>
00605     class ctype : public __ctype_abstract_base<_CharT>
00606     {
00607     public:
00608       // Types:
00609       typedef _CharT            char_type;
00610       typedef typename __ctype_abstract_base<_CharT>::mask mask;
00611 
00612       /// The facet id for ctype<char_type>
00613       static locale::id         id;
00614 
00615       explicit
00616       ctype(size_t __refs = 0) : __ctype_abstract_base<_CharT>(__refs) { }
00617 
00618    protected:
00619       virtual
00620       ~ctype();
00621 
00622       virtual bool
00623       do_is(mask __m, char_type __c) const;
00624 
00625       virtual const char_type*
00626       do_is(const char_type* __lo, const char_type* __hi, mask* __vec) const;
00627 
00628       virtual const char_type*
00629       do_scan_is(mask __m, const char_type* __lo, const char_type* __hi) const;
00630 
00631       virtual const char_type*
00632       do_scan_not(mask __m, const char_type* __lo,
00633           const char_type* __hi) const;
00634 
00635       virtual char_type
00636       do_toupper(char_type __c) const;
00637 
00638       virtual const char_type*
00639       do_toupper(char_type* __lo, const char_type* __hi) const;
00640 
00641       virtual char_type
00642       do_tolower(char_type __c) const;
00643 
00644       virtual const char_type*
00645       do_tolower(char_type* __lo, const char_type* __hi) const;
00646 
00647       virtual char_type
00648       do_widen(char __c) const;
00649 
00650       virtual const char*
00651       do_widen(const char* __lo, const char* __hi, char_type* __dest) const;
00652 
00653       virtual char
00654       do_narrow(char_type, char __dfault) const;
00655 
00656       virtual const char_type*
00657       do_narrow(const char_type* __lo, const char_type* __hi,
00658         char __dfault, char* __dest) const;
00659     };
00660 
00661   template<typename _CharT>
00662     locale::id ctype<_CharT>::id;
00663 
00664   // 22.2.1.3  ctype<char> specialization.
00665   /**
00666    *  @brief  The ctype<char> specialization.
00667    *
00668    *  This class defines classification and conversion functions for
00669    *  the char type.  It gets used by char streams for many I/O
00670    *  operations.  The char specialization provides a number of
00671    *  optimizations as well.
00672   */
00673   template<>
00674     class ctype<char> : public locale::facet, public ctype_base
00675     {
00676     public:
00677       // Types:
00678       /// Typedef for the template parameter char.
00679       typedef char      char_type;
00680 
00681     protected:
00682       // Data Members:
00683       __c_locale        _M_c_locale_ctype;
00684       bool          _M_del;
00685       __to_type         _M_toupper;
00686       __to_type         _M_tolower;
00687       const mask*       _M_table;
00688       mutable char      _M_widen_ok;
00689       mutable char      _M_widen[1 + static_cast<unsigned char>(-1)];
00690       mutable char      _M_narrow[1 + static_cast<unsigned char>(-1)];
00691       mutable char      _M_narrow_ok;   // 0 uninitialized, 1 init,
00692                         // 2 memcpy can't be used
00693 
00694     public:
00695       /// The facet id for ctype<char>
00696       static locale::id        id;
00697       /// The size of the mask table.  It is SCHAR_MAX + 1.
00698       static const size_t      table_size = 1 + static_cast<unsigned char>(-1);
00699 
00700       /**
00701        *  @brief  Constructor performs initialization.
00702        *
00703        *  This is the constructor provided by the standard.
00704        *
00705        *  @param table If non-zero, table is used as the per-char mask.
00706        *               Else classic_table() is used.
00707        *  @param del   If true, passes ownership of table to this facet.
00708        *  @param refs  Passed to the base facet class.
00709       */
00710       explicit
00711       ctype(const mask* __table = 0, bool __del = false, size_t __refs = 0);
00712 
00713       /**
00714        *  @brief  Constructor performs static initialization.
00715        *
00716        *  This constructor is used to construct the initial C locale facet.
00717        *
00718        *  @param cloc  Handle to C locale data.
00719        *  @param table If non-zero, table is used as the per-char mask.
00720        *  @param del   If true, passes ownership of table to this facet.
00721        *  @param refs  Passed to the base facet class.
00722       */
00723       explicit
00724       ctype(__c_locale __cloc, const mask* __table = 0, bool __del = false,
00725         size_t __refs = 0);
00726 
00727       /**
00728        *  @brief  Test char classification.
00729        *
00730        *  This function compares the mask table[c] to @a m.
00731        *
00732        *  @param c  The char to compare the mask of.
00733        *  @param m  The mask to compare against.
00734        *  @return  True if m & table[c] is true, false otherwise.
00735       */
00736       inline bool
00737       is(mask __m, char __c) const;
00738 
00739       /**
00740        *  @brief  Return a mask array.
00741        *
00742        *  This function finds the mask for each char in the range [lo, hi) and
00743        *  successively writes it to vec.  vec must have as many elements as
00744        *  the char array.
00745        *
00746        *  @param lo  Pointer to start of range.
00747        *  @param hi  Pointer to end of range.
00748        *  @param vec  Pointer to an array of mask storage.
00749        *  @return  @a hi.
00750       */
00751       inline const char*
00752       is(const char* __lo, const char* __hi, mask* __vec) const;
00753 
00754       /**
00755        *  @brief  Find char matching a mask
00756        *
00757        *  This function searches for and returns the first char in [lo,hi) for
00758        *  which is(m,char) is true.
00759        *
00760        *  @param m  The mask to compare against.
00761        *  @param lo  Pointer to start of range.
00762        *  @param hi  Pointer to end of range.
00763        *  @return  Pointer to a matching char if found, else @a hi.
00764       */
00765       inline const char*
00766       scan_is(mask __m, const char* __lo, const char* __hi) const;
00767 
00768       /**
00769        *  @brief  Find char not matching a mask
00770        *
00771        *  This function searches for and returns a pointer to the first char
00772        *  in [lo,hi) for which is(m,char) is false.
00773        *
00774        *  @param m  The mask to compare against.
00775        *  @param lo  Pointer to start of range.
00776        *  @param hi  Pointer to end of range.
00777        *  @return  Pointer to a non-matching char if found, else @a hi.
00778       */
00779       inline const char*
00780       scan_not(mask __m, const char* __lo, const char* __hi) const;
00781 
00782       /**
00783        *  @brief  Convert to uppercase.
00784        *
00785        *  This function converts the char argument to uppercase if possible.
00786        *  If not possible (for example, '2'), returns the argument.
00787        *
00788        *  toupper() acts as if it returns ctype<char>::do_toupper(c).
00789        *  do_toupper() must always return the same result for the same input.
00790        *
00791        *  @param c  The char to convert.
00792        *  @return  The uppercase char if convertible, else @a c.
00793       */
00794       char_type
00795       toupper(char_type __c) const
00796       { return this->do_toupper(__c); }
00797 
00798       /**
00799        *  @brief  Convert array to uppercase.
00800        *
00801        *  This function converts each char in the range [lo,hi) to uppercase
00802        *  if possible.  Other chars remain untouched.
00803        *
00804        *  toupper() acts as if it returns ctype<char>:: do_toupper(lo, hi).
00805        *  do_toupper() must always return the same result for the same input.
00806        *
00807        *  @param lo  Pointer to first char in range.
00808        *  @param hi  Pointer to end of range.
00809        *  @return  @a hi.
00810       */
00811       const char_type*
00812       toupper(char_type *__lo, const char_type* __hi) const
00813       { return this->do_toupper(__lo, __hi); }
00814 
00815       /**
00816        *  @brief  Convert to lowercase.
00817        *
00818        *  This function converts the char argument to lowercase if possible.
00819        *  If not possible (for example, '2'), returns the argument.
00820        *
00821        *  tolower() acts as if it returns ctype<char>::do_tolower(c).
00822        *  do_tolower() must always return the same result for the same input.
00823        *
00824        *  @param c  The char to convert.
00825        *  @return  The lowercase char if convertible, else @a c.
00826       */
00827       char_type
00828       tolower(char_type __c) const
00829       { return this->do_tolower(__c); }
00830 
00831       /**
00832        *  @brief  Convert array to lowercase.
00833        *
00834        *  This function converts each char in the range [lo,hi) to lowercase
00835        *  if possible.  Other chars remain untouched.
00836        *
00837        *  tolower() acts as if it returns ctype<char>:: do_tolower(lo, hi).
00838        *  do_tolower() must always return the same result for the same input.
00839        *
00840        *  @param lo  Pointer to first char in range.
00841        *  @param hi  Pointer to end of range.
00842        *  @return  @a hi.
00843       */
00844       const char_type*
00845       tolower(char_type* __lo, const char_type* __hi) const
00846       { return this->do_tolower(__lo, __hi); }
00847 
00848       /**
00849        *  @brief  Widen char
00850        *
00851        *  This function converts the char to char_type using the simplest
00852        *  reasonable transformation.  For an underived ctype<char> facet, the
00853        *  argument will be returned unchanged.
00854        *
00855        *  This function works as if it returns ctype<char>::do_widen(c).
00856        *  do_widen() must always return the same result for the same input.
00857        *
00858        *  Note: this is not what you want for codepage conversions.  See
00859        *  codecvt for that.
00860        *
00861        *  @param c  The char to convert.
00862        *  @return  The converted character.
00863       */
00864       char_type
00865       widen(char __c) const
00866       {
00867     if (_M_widen_ok)
00868       return _M_widen[static_cast<unsigned char>(__c)];
00869     this->_M_widen_init();
00870     return this->do_widen(__c);
00871       }
00872 
00873       /**
00874        *  @brief  Widen char array
00875        *
00876        *  This function converts each char in the input to char using the
00877        *  simplest reasonable transformation.  For an underived ctype<char>
00878        *  facet, the argument will be copied unchanged.
00879        *
00880        *  This function works as if it returns ctype<char>::do_widen(c).
00881        *  do_widen() must always return the same result for the same input.
00882        *
00883        *  Note: this is not what you want for codepage conversions.  See
00884        *  codecvt for that.
00885        *
00886        *  @param lo  Pointer to first char in range.
00887        *  @param hi  Pointer to end of range.
00888        *  @param to  Pointer to the destination array.
00889        *  @return  @a hi.
00890       */
00891       const char*
00892       widen(const char* __lo, const char* __hi, char_type* __to) const
00893       {
00894     if (_M_widen_ok == 1)
00895       {
00896         __builtin_memcpy(__to, __lo, __hi - __lo);
00897         return __hi;
00898       }
00899     if (!_M_widen_ok)
00900       _M_widen_init();
00901     return this->do_widen(__lo, __hi, __to);
00902       }
00903 
00904       /**
00905        *  @brief  Narrow char
00906        *
00907        *  This function converts the char to char using the simplest
00908        *  reasonable transformation.  If the conversion fails, dfault is
00909        *  returned instead.  For an underived ctype<char> facet, @a c
00910        *  will be returned unchanged.
00911        *
00912        *  This function works as if it returns ctype<char>::do_narrow(c).
00913        *  do_narrow() must always return the same result for the same input.
00914        *
00915        *  Note: this is not what you want for codepage conversions.  See
00916        *  codecvt for that.
00917        *
00918        *  @param c  The char to convert.
00919        *  @param dfault  Char to return if conversion fails.
00920        *  @return  The converted character.
00921       */
00922       char
00923       narrow(char_type __c, char __dfault) const
00924       {
00925     if (_M_narrow[static_cast<unsigned char>(__c)])
00926       return _M_narrow[static_cast<unsigned char>(__c)];
00927     const char __t = do_narrow(__c, __dfault);
00928     if (__t != __dfault)
00929       _M_narrow[static_cast<unsigned char>(__c)] = __t;
00930     return __t;
00931       }
00932 
00933       /**
00934        *  @brief  Narrow char array
00935        *
00936        *  This function converts each char in the input to char using the
00937        *  simplest reasonable transformation and writes the results to the
00938        *  destination array.  For any char in the input that cannot be
00939        *  converted, @a dfault is used instead.  For an underived ctype<char>
00940        *  facet, the argument will be copied unchanged.
00941        *
00942        *  This function works as if it returns ctype<char>::do_narrow(lo, hi,
00943        *  dfault, to).  do_narrow() must always return the same result for the
00944        *  same input.
00945        *
00946        *  Note: this is not what you want for codepage conversions.  See
00947        *  codecvt for that.
00948        *
00949        *  @param lo  Pointer to start of range.
00950        *  @param hi  Pointer to end of range.
00951        *  @param dfault  Char to use if conversion fails.
00952        *  @param to  Pointer to the destination array.
00953        *  @return  @a hi.
00954       */
00955       const char_type*
00956       narrow(const char_type* __lo, const char_type* __hi,
00957          char __dfault, char *__to) const
00958       {
00959     if (__builtin_expect(_M_narrow_ok == 1, true))
00960       {
00961         __builtin_memcpy(__to, __lo, __hi - __lo);
00962         return __hi;
00963       }
00964     if (!_M_narrow_ok)
00965       _M_narrow_init();
00966     return this->do_narrow(__lo, __hi, __dfault, __to);
00967       }
00968 
00969       // _GLIBCXX_RESOLVE_LIB_DEFECTS
00970       // DR 695. ctype<char>::classic_table() not accessible.
00971       /// Returns a pointer to the mask table provided to the constructor, or
00972       /// the default from classic_table() if none was provided.
00973       const mask*
00974       table() const throw()
00975       { return _M_table; }
00976 
00977       /// Returns a pointer to the C locale mask table.
00978       static const mask*
00979       classic_table() throw();
00980     protected:
00981 
00982       /**
00983        *  @brief  Destructor.
00984        *
00985        *  This function deletes table() if @a del was true in the
00986        *  constructor.
00987       */
00988       virtual
00989       ~ctype();
00990 
00991       /**
00992        *  @brief  Convert to uppercase.
00993        *
00994        *  This virtual function converts the char argument to uppercase if
00995        *  possible.  If not possible (for example, '2'), returns the argument.
00996        *
00997        *  do_toupper() is a hook for a derived facet to change the behavior of
00998        *  uppercasing.  do_toupper() must always return the same result for
00999        *  the same input.
01000        *
01001        *  @param c  The char to convert.
01002        *  @return  The uppercase char if convertible, else @a c.
01003       */
01004       virtual char_type
01005       do_toupper(char_type) const;
01006 
01007       /**
01008        *  @brief  Convert array to uppercase.
01009        *
01010        *  This virtual function converts each char in the range [lo,hi) to
01011        *  uppercase if possible.  Other chars remain untouched.
01012        *
01013        *  do_toupper() is a hook for a derived facet to change the behavior of
01014        *  uppercasing.  do_toupper() must always return the same result for
01015        *  the same input.
01016        *
01017        *  @param lo  Pointer to start of range.
01018        *  @param hi  Pointer to end of range.
01019        *  @return  @a hi.
01020       */
01021       virtual const char_type*
01022       do_toupper(char_type* __lo, const char_type* __hi) const;
01023 
01024       /**
01025        *  @brief  Convert to lowercase.
01026        *
01027        *  This virtual function converts the char argument to lowercase if
01028        *  possible.  If not possible (for example, '2'), returns the argument.
01029        *
01030        *  do_tolower() is a hook for a derived facet to change the behavior of
01031        *  lowercasing.  do_tolower() must always return the same result for
01032        *  the same input.
01033        *
01034        *  @param c  The char to convert.
01035        *  @return  The lowercase char if convertible, else @a c.
01036       */
01037       virtual char_type
01038       do_tolower(char_type) const;
01039 
01040       /**
01041        *  @brief  Convert array to lowercase.
01042        *
01043        *  This virtual function converts each char in the range [lo,hi) to
01044        *  lowercase if possible.  Other chars remain untouched.
01045        *
01046        *  do_tolower() is a hook for a derived facet to change the behavior of
01047        *  lowercasing.  do_tolower() must always return the same result for
01048        *  the same input.
01049        *
01050        *  @param lo  Pointer to first char in range.
01051        *  @param hi  Pointer to end of range.
01052        *  @return  @a hi.
01053       */
01054       virtual const char_type*
01055       do_tolower(char_type* __lo, const char_type* __hi) const;
01056 
01057       /**
01058        *  @brief  Widen char
01059        *
01060        *  This virtual function converts the char to char using the simplest
01061        *  reasonable transformation.  For an underived ctype<char> facet, the
01062        *  argument will be returned unchanged.
01063        *
01064        *  do_widen() is a hook for a derived facet to change the behavior of
01065        *  widening.  do_widen() must always return the same result for the
01066        *  same input.
01067        *
01068        *  Note: this is not what you want for codepage conversions.  See
01069        *  codecvt for that.
01070        *
01071        *  @param c  The char to convert.
01072        *  @return  The converted character.
01073       */
01074       virtual char_type
01075       do_widen(char __c) const
01076       { return __c; }
01077 
01078       /**
01079        *  @brief  Widen char array
01080        *
01081        *  This function converts each char in the range [lo,hi) to char using
01082        *  the simplest reasonable transformation.  For an underived
01083        *  ctype<char> facet, the argument will be copied unchanged.
01084        *
01085        *  do_widen() is a hook for a derived facet to change the behavior of
01086        *  widening.  do_widen() must always return the same result for the
01087        *  same input.
01088        *
01089        *  Note: this is not what you want for codepage conversions.  See
01090        *  codecvt for that.
01091        *
01092        *  @param lo  Pointer to start of range.
01093        *  @param hi  Pointer to end of range.
01094        *  @param to  Pointer to the destination array.
01095        *  @return  @a hi.
01096       */
01097       virtual const char*
01098       do_widen(const char* __lo, const char* __hi, char_type* __dest) const
01099       {
01100     __builtin_memcpy(__dest, __lo, __hi - __lo);
01101     return __hi;
01102       }
01103 
01104       /**
01105        *  @brief  Narrow char
01106        *
01107        *  This virtual function converts the char to char using the simplest
01108        *  reasonable transformation.  If the conversion fails, dfault is
01109        *  returned instead.  For an underived ctype<char> facet, @a c will be
01110        *  returned unchanged.
01111        *
01112        *  do_narrow() is a hook for a derived facet to change the behavior of
01113        *  narrowing.  do_narrow() must always return the same result for the
01114        *  same input.
01115        *
01116        *  Note: this is not what you want for codepage conversions.  See
01117        *  codecvt for that.
01118        *
01119        *  @param c  The char to convert.
01120        *  @param dfault  Char to return if conversion fails.
01121        *  @return  The converted char.
01122       */
01123       virtual char
01124       do_narrow(char_type __c, char) const
01125       { return __c; }
01126 
01127       /**
01128        *  @brief  Narrow char array to char array
01129        *
01130        *  This virtual function converts each char in the range [lo,hi) to
01131        *  char using the simplest reasonable transformation and writes the
01132        *  results to the destination array.  For any char in the input that
01133        *  cannot be converted, @a dfault is used instead.  For an underived
01134        *  ctype<char> facet, the argument will be copied unchanged.
01135        *
01136        *  do_narrow() is a hook for a derived facet to change the behavior of
01137        *  narrowing.  do_narrow() must always return the same result for the
01138        *  same input.
01139        *
01140        *  Note: this is not what you want for codepage conversions.  See
01141        *  codecvt for that.
01142        *
01143        *  @param lo  Pointer to start of range.
01144        *  @param hi  Pointer to end of range.
01145        *  @param dfault  Char to use if conversion fails.
01146        *  @param to  Pointer to the destination array.
01147        *  @return  @a hi.
01148       */
01149       virtual const char_type*
01150       do_narrow(const char_type* __lo, const char_type* __hi,
01151         char, char* __dest) const
01152       {
01153     __builtin_memcpy(__dest, __lo, __hi - __lo);
01154     return __hi;
01155       }
01156 
01157     private:
01158       void _M_narrow_init() const;
01159       void _M_widen_init() const;
01160     };
01161 
01162 #ifdef _GLIBCXX_USE_WCHAR_T
01163   // 22.2.1.3  ctype<wchar_t> specialization
01164   /**
01165    *  @brief  The ctype<wchar_t> specialization.
01166    *
01167    *  This class defines classification and conversion functions for the
01168    *  wchar_t type.  It gets used by wchar_t streams for many I/O operations.
01169    *  The wchar_t specialization provides a number of optimizations as well.
01170    *
01171    *  ctype<wchar_t> inherits its public methods from
01172    *  __ctype_abstract_base<wchar_t>.
01173   */
01174   template<>
01175     class ctype<wchar_t> : public __ctype_abstract_base<wchar_t>
01176     {
01177     public:
01178       // Types:
01179       /// Typedef for the template parameter wchar_t.
01180       typedef wchar_t       char_type;
01181       typedef wctype_t      __wmask_type;
01182 
01183     protected:
01184       __c_locale        _M_c_locale_ctype;
01185 
01186       // Pre-computed narrowed and widened chars.
01187       bool                      _M_narrow_ok;
01188       char                      _M_narrow[128];
01189       wint_t                    _M_widen[1 + static_cast<unsigned char>(-1)];
01190 
01191       // Pre-computed elements for do_is.
01192       mask                      _M_bit[16];
01193       __wmask_type              _M_wmask[16];
01194 
01195     public:
01196       // Data Members:
01197       /// The facet id for ctype<wchar_t>
01198       static locale::id     id;
01199 
01200       /**
01201        *  @brief  Constructor performs initialization.
01202        *
01203        *  This is the constructor provided by the standard.
01204        *
01205        *  @param refs  Passed to the base facet class.
01206       */
01207       explicit
01208       ctype(size_t __refs = 0);
01209 
01210       /**
01211        *  @brief  Constructor performs static initialization.
01212        *
01213        *  This constructor is used to construct the initial C locale facet.
01214        *
01215        *  @param cloc  Handle to C locale data.
01216        *  @param refs  Passed to the base facet class.
01217       */
01218       explicit
01219       ctype(__c_locale __cloc, size_t __refs = 0);
01220 
01221     protected:
01222       __wmask_type
01223       _M_convert_to_wmask(const mask __m) const;
01224 
01225       /// Destructor
01226       virtual
01227       ~ctype();
01228 
01229       /**
01230        *  @brief  Test wchar_t classification.
01231        *
01232        *  This function finds a mask M for @a c and compares it to mask @a m.
01233        *
01234        *  do_is() is a hook for a derived facet to change the behavior of
01235        *  classifying.  do_is() must always return the same result for the
01236        *  same input.
01237        *
01238        *  @param c  The wchar_t to find the mask of.
01239        *  @param m  The mask to compare against.
01240        *  @return  (M & m) != 0.
01241       */
01242       virtual bool
01243       do_is(mask __m, char_type __c) const;
01244 
01245       /**
01246        *  @brief  Return a mask array.
01247        *
01248        *  This function finds the mask for each wchar_t in the range [lo,hi)
01249        *  and successively writes it to vec.  vec must have as many elements
01250        *  as the input.
01251        *
01252        *  do_is() is a hook for a derived facet to change the behavior of
01253        *  classifying.  do_is() must always return the same result for the
01254        *  same input.
01255        *
01256        *  @param lo  Pointer to start of range.
01257        *  @param hi  Pointer to end of range.
01258        *  @param vec  Pointer to an array of mask storage.
01259        *  @return  @a hi.
01260       */
01261       virtual const char_type*
01262       do_is(const char_type* __lo, const char_type* __hi, mask* __vec) const;
01263 
01264       /**
01265        *  @brief  Find wchar_t matching mask
01266        *
01267        *  This function searches for and returns the first wchar_t c in
01268        *  [lo,hi) for which is(m,c) is true.
01269        *
01270        *  do_scan_is() is a hook for a derived facet to change the behavior of
01271        *  match searching.  do_is() must always return the same result for the
01272        *  same input.
01273        *
01274        *  @param m  The mask to compare against.
01275        *  @param lo  Pointer to start of range.
01276        *  @param hi  Pointer to end of range.
01277        *  @return  Pointer to a matching wchar_t if found, else @a hi.
01278       */
01279       virtual const char_type*
01280       do_scan_is(mask __m, const char_type* __lo, const char_type* __hi) const;
01281 
01282       /**
01283        *  @brief  Find wchar_t not matching mask
01284        *
01285        *  This function searches for and returns a pointer to the first
01286        *  wchar_t c of [lo,hi) for which is(m,c) is false.
01287        *
01288        *  do_scan_is() is a hook for a derived facet to change the behavior of
01289        *  match searching.  do_is() must always return the same result for the
01290        *  same input.
01291        *
01292        *  @param m  The mask to compare against.
01293        *  @param lo  Pointer to start of range.
01294        *  @param hi  Pointer to end of range.
01295        *  @return  Pointer to a non-matching wchar_t if found, else @a hi.
01296       */
01297       virtual const char_type*
01298       do_scan_not(mask __m, const char_type* __lo,
01299           const char_type* __hi) const;
01300 
01301       /**
01302        *  @brief  Convert to uppercase.
01303        *
01304        *  This virtual function converts the wchar_t argument to uppercase if
01305        *  possible.  If not possible (for example, '2'), returns the argument.
01306        *
01307        *  do_toupper() is a hook for a derived facet to change the behavior of
01308        *  uppercasing.  do_toupper() must always return the same result for
01309        *  the same input.
01310        *
01311        *  @param c  The wchar_t to convert.
01312        *  @return  The uppercase wchar_t if convertible, else @a c.
01313       */
01314       virtual char_type
01315       do_toupper(char_type) const;
01316 
01317       /**
01318        *  @brief  Convert array to uppercase.
01319        *
01320        *  This virtual function converts each wchar_t in the range [lo,hi) to
01321        *  uppercase if possible.  Other elements remain untouched.
01322        *
01323        *  do_toupper() is a hook for a derived facet to change the behavior of
01324        *  uppercasing.  do_toupper() must always return the same result for
01325        *  the same input.
01326        *
01327        *  @param lo  Pointer to start of range.
01328        *  @param hi  Pointer to end of range.
01329        *  @return  @a hi.
01330       */
01331       virtual const char_type*
01332       do_toupper(char_type* __lo, const char_type* __hi) const;
01333 
01334       /**
01335        *  @brief  Convert to lowercase.
01336        *
01337        *  This virtual function converts the argument to lowercase if
01338        *  possible.  If not possible (for example, '2'), returns the argument.
01339        *
01340        *  do_tolower() is a hook for a derived facet to change the behavior of
01341        *  lowercasing.  do_tolower() must always return the same result for
01342        *  the same input.
01343        *
01344        *  @param c  The wchar_t to convert.
01345        *  @return  The lowercase wchar_t if convertible, else @a c.
01346       */
01347       virtual char_type
01348       do_tolower(char_type) const;
01349 
01350       /**
01351        *  @brief  Convert array to lowercase.
01352        *
01353        *  This virtual function converts each wchar_t in the range [lo,hi) to
01354        *  lowercase if possible.  Other elements remain untouched.
01355        *
01356        *  do_tolower() is a hook for a derived facet to change the behavior of
01357        *  lowercasing.  do_tolower() must always return the same result for
01358        *  the same input.
01359        *
01360        *  @param lo  Pointer to start of range.
01361        *  @param hi  Pointer to end of range.
01362        *  @return  @a hi.
01363       */
01364       virtual const char_type*
01365       do_tolower(char_type* __lo, const char_type* __hi) const;
01366 
01367       /**
01368        *  @brief  Widen char to wchar_t
01369        *
01370        *  This virtual function converts the char to wchar_t using the
01371        *  simplest reasonable transformation.  For an underived ctype<wchar_t>
01372        *  facet, the argument will be cast to wchar_t.
01373        *
01374        *  do_widen() is a hook for a derived facet to change the behavior of
01375        *  widening.  do_widen() must always return the same result for the
01376        *  same input.
01377        *
01378        *  Note: this is not what you want for codepage conversions.  See
01379        *  codecvt for that.
01380        *
01381        *  @param c  The char to convert.
01382        *  @return  The converted wchar_t.
01383       */
01384       virtual char_type
01385       do_widen(char) const;
01386 
01387       /**
01388        *  @brief  Widen char array to wchar_t array
01389        *
01390        *  This function converts each char in the input to wchar_t using the
01391        *  simplest reasonable transformation.  For an underived ctype<wchar_t>
01392        *  facet, the argument will be copied, casting each element to wchar_t.
01393        *
01394        *  do_widen() is a hook for a derived facet to change the behavior of
01395        *  widening.  do_widen() must always return the same result for the
01396        *  same input.
01397        *
01398        *  Note: this is not what you want for codepage conversions.  See
01399        *  codecvt for that.
01400        *
01401        *  @param lo  Pointer to start range.
01402        *  @param hi  Pointer to end of range.
01403        *  @param to  Pointer to the destination array.
01404        *  @return  @a hi.
01405       */
01406       virtual const char*
01407       do_widen(const char* __lo, const char* __hi, char_type* __dest) const;
01408 
01409       /**
01410        *  @brief  Narrow wchar_t to char
01411        *
01412        *  This virtual function converts the argument to char using
01413        *  the simplest reasonable transformation.  If the conversion
01414        *  fails, dfault is returned instead.  For an underived
01415        *  ctype<wchar_t> facet, @a c will be cast to char and
01416        *  returned.
01417        *
01418        *  do_narrow() is a hook for a derived facet to change the
01419        *  behavior of narrowing.  do_narrow() must always return the
01420        *  same result for the same input.
01421        *
01422        *  Note: this is not what you want for codepage conversions.  See
01423        *  codecvt for that.
01424        *
01425        *  @param c  The wchar_t to convert.
01426        *  @param dfault  Char to return if conversion fails.
01427        *  @return  The converted char.
01428       */
01429       virtual char
01430       do_narrow(char_type, char __dfault) const;
01431 
01432       /**
01433        *  @brief  Narrow wchar_t array to char array
01434        *
01435        *  This virtual function converts each wchar_t in the range [lo,hi) to
01436        *  char using the simplest reasonable transformation and writes the
01437        *  results to the destination array.  For any wchar_t in the input that
01438        *  cannot be converted, @a dfault is used instead.  For an underived
01439        *  ctype<wchar_t> facet, the argument will be copied, casting each
01440        *  element to char.
01441        *
01442        *  do_narrow() is a hook for a derived facet to change the behavior of
01443        *  narrowing.  do_narrow() must always return the same result for the
01444        *  same input.
01445        *
01446        *  Note: this is not what you want for codepage conversions.  See
01447        *  codecvt for that.
01448        *
01449        *  @param lo  Pointer to start of range.
01450        *  @param hi  Pointer to end of range.
01451        *  @param dfault  Char to use if conversion fails.
01452        *  @param to  Pointer to the destination array.
01453        *  @return  @a hi.
01454       */
01455       virtual const char_type*
01456       do_narrow(const char_type* __lo, const char_type* __hi,
01457         char __dfault, char* __dest) const;
01458 
01459       // For use at construction time only.
01460       void
01461       _M_initialize_ctype();
01462     };
01463 #endif //_GLIBCXX_USE_WCHAR_T
01464 
01465   /// class ctype_byname [22.2.1.2].
01466   template<typename _CharT>
01467     class ctype_byname : public ctype<_CharT>
01468     {
01469     public:
01470       typedef typename ctype<_CharT>::mask  mask;
01471 
01472       explicit
01473       ctype_byname(const char* __s, size_t __refs = 0);
01474 
01475     protected:
01476       virtual
01477       ~ctype_byname() { };
01478     };
01479 
01480   /// 22.2.1.4  Class ctype_byname specializations.
01481   template<>
01482     class ctype_byname<char> : public ctype<char>
01483     {
01484     public:
01485       explicit
01486       ctype_byname(const char* __s, size_t __refs = 0);
01487 
01488     protected:
01489       virtual
01490       ~ctype_byname();
01491     };
01492 
01493 #ifdef _GLIBCXX_USE_WCHAR_T
01494   template<>
01495     class ctype_byname<wchar_t> : public ctype<wchar_t>
01496     {
01497     public:
01498       explicit
01499       ctype_byname(const char* __s, size_t __refs = 0);
01500 
01501     protected:
01502       virtual
01503       ~ctype_byname();
01504     };
01505 #endif
01506 
01507 _GLIBCXX_END_NAMESPACE
01508 
01509 // Include host and configuration specific ctype inlines.
01510 #include <bits/ctype_inline.h>
01511 
01512 _GLIBCXX_BEGIN_NAMESPACE(std)
01513 
01514   // 22.2.2  The numeric category.
01515   class __num_base
01516   {
01517   public:
01518     // NB: Code depends on the order of _S_atoms_out elements.
01519     // Below are the indices into _S_atoms_out.
01520     enum
01521       {
01522         _S_ominus,
01523         _S_oplus,
01524         _S_ox,
01525         _S_oX,
01526         _S_odigits,
01527         _S_odigits_end = _S_odigits + 16,
01528         _S_oudigits = _S_odigits_end,
01529         _S_oudigits_end = _S_oudigits + 16,
01530         _S_oe = _S_odigits + 14,  // For scientific notation, 'e'
01531         _S_oE = _S_oudigits + 14, // For scientific notation, 'E'
01532     _S_oend = _S_oudigits_end
01533       };
01534 
01535     // A list of valid numeric literals for output.  This array
01536     // contains chars that will be passed through the current locale's
01537     // ctype<_CharT>.widen() and then used to render numbers.
01538     // For the standard "C" locale, this is
01539     // "-+xX0123456789abcdef0123456789ABCDEF".
01540     static const char* _S_atoms_out;
01541 
01542     // String literal of acceptable (narrow) input, for num_get.
01543     // "-+xX0123456789abcdefABCDEF"
01544     static const char* _S_atoms_in;
01545 
01546     enum
01547     {
01548       _S_iminus,
01549       _S_iplus,
01550       _S_ix,
01551       _S_iX,
01552       _S_izero,
01553       _S_ie = _S_izero + 14,
01554       _S_iE = _S_izero + 20,
01555       _S_iend = 26
01556     };
01557 
01558     // num_put
01559     // Construct and return valid scanf format for floating point types.
01560     static void
01561     _S_format_float(const ios_base& __io, char* __fptr, char __mod);
01562   };
01563 
01564   template<typename _CharT>
01565     struct __numpunct_cache : public locale::facet
01566     {
01567       const char*           _M_grouping;
01568       size_t                            _M_grouping_size;
01569       bool              _M_use_grouping;
01570       const _CharT*         _M_truename;
01571       size_t                            _M_truename_size;
01572       const _CharT*         _M_falsename;
01573       size_t                            _M_falsename_size;
01574       _CharT                _M_decimal_point;
01575       _CharT                _M_thousands_sep;
01576 
01577       // A list of valid numeric literals for output: in the standard
01578       // "C" locale, this is "-+xX0123456789abcdef0123456789ABCDEF".
01579       // This array contains the chars after having been passed
01580       // through the current locale's ctype<_CharT>.widen().
01581       _CharT                _M_atoms_out[__num_base::_S_oend];
01582 
01583       // A list of valid numeric literals for input: in the standard
01584       // "C" locale, this is "-+xX0123456789abcdefABCDEF"
01585       // This array contains the chars after having been passed
01586       // through the current locale's ctype<_CharT>.widen().
01587       _CharT                _M_atoms_in[__num_base::_S_iend];
01588 
01589       bool              _M_allocated;
01590 
01591       __numpunct_cache(size_t __refs = 0) : facet(__refs),
01592       _M_grouping(NULL), _M_grouping_size(0), _M_use_grouping(false),
01593       _M_truename(NULL), _M_truename_size(0), _M_falsename(NULL),
01594       _M_falsename_size(0), _M_decimal_point(_CharT()),
01595       _M_thousands_sep(_CharT()), _M_allocated(false)
01596       { }
01597 
01598       ~__numpunct_cache();
01599 
01600       void
01601       _M_cache(const locale& __loc);
01602 
01603     private:
01604       __numpunct_cache&
01605       operator=(const __numpunct_cache&);
01606       
01607       explicit
01608       __numpunct_cache(const __numpunct_cache&);
01609     };
01610 
01611   template<typename _CharT>
01612     __numpunct_cache<_CharT>::~__numpunct_cache()
01613     {
01614       if (_M_allocated)
01615     {
01616       delete [] _M_grouping;
01617       delete [] _M_truename;
01618       delete [] _M_falsename;
01619     }
01620     }
01621 
01622   /**
01623    *  @brief  Numpunct facet.
01624    *
01625    *  This facet stores several pieces of information related to printing and
01626    *  scanning numbers, such as the decimal point character.  It takes a
01627    *  template parameter specifying the char type.  The numpunct facet is
01628    *  used by streams for many I/O operations involving numbers.
01629    *
01630    *  The numpunct template uses protected virtual functions to provide the
01631    *  actual results.  The public accessors forward the call to the virtual
01632    *  functions.  These virtual functions are hooks for developers to
01633    *  implement the behavior they require from a numpunct facet.
01634   */
01635   template<typename _CharT>
01636     class numpunct : public locale::facet
01637     {
01638     public:
01639       // Types:
01640       //@{
01641       /// Public typedefs
01642       typedef _CharT            char_type;
01643       typedef basic_string<_CharT>  string_type;
01644       //@}
01645       typedef __numpunct_cache<_CharT>  __cache_type;
01646 
01647     protected:
01648       __cache_type*         _M_data;
01649 
01650     public:
01651       /// Numpunct facet id.
01652       static locale::id         id;
01653 
01654       /**
01655        *  @brief  Numpunct constructor.
01656        *
01657        *  @param  refs  Refcount to pass to the base class.
01658        */
01659       explicit
01660       numpunct(size_t __refs = 0) : facet(__refs), _M_data(NULL)
01661       { _M_initialize_numpunct(); }
01662 
01663       /**
01664        *  @brief  Internal constructor.  Not for general use.
01665        *
01666        *  This is a constructor for use by the library itself to set up the
01667        *  predefined locale facets.
01668        *
01669        *  @param  cache  __numpunct_cache object.
01670        *  @param  refs  Refcount to pass to the base class.
01671        */
01672       explicit
01673       numpunct(__cache_type* __cache, size_t __refs = 0)
01674       : facet(__refs), _M_data(__cache)
01675       { _M_initialize_numpunct(); }
01676 
01677       /**
01678        *  @brief  Internal constructor.  Not for general use.
01679        *
01680        *  This is a constructor for use by the library itself to set up new
01681        *  locales.
01682        *
01683        *  @param  cloc  The "C" locale.
01684        *  @param  refs  Refcount to pass to the base class.
01685        */
01686       explicit
01687       numpunct(__c_locale __cloc, size_t __refs = 0)
01688       : facet(__refs), _M_data(NULL)
01689       { _M_initialize_numpunct(__cloc); }
01690 
01691       /**
01692        *  @brief  Return decimal point character.
01693        *
01694        *  This function returns a char_type to use as a decimal point.  It
01695        *  does so by returning returning
01696        *  numpunct<char_type>::do_decimal_point().
01697        *
01698        *  @return  @a char_type representing a decimal point.
01699       */
01700       char_type
01701       decimal_point() const
01702       { return this->do_decimal_point(); }
01703 
01704       /**
01705        *  @brief  Return thousands separator character.
01706        *
01707        *  This function returns a char_type to use as a thousands
01708        *  separator.  It does so by returning returning
01709        *  numpunct<char_type>::do_thousands_sep().
01710        *
01711        *  @return  char_type representing a thousands separator.
01712       */
01713       char_type
01714       thousands_sep() const
01715       { return this->do_thousands_sep(); }
01716 
01717       /**
01718        *  @brief  Return grouping specification.
01719        *
01720        *  This function returns a string representing groupings for the
01721        *  integer part of a number.  Groupings indicate where thousands
01722        *  separators should be inserted in the integer part of a number.
01723        *
01724        *  Each char in the return string is interpret as an integer
01725        *  rather than a character.  These numbers represent the number
01726        *  of digits in a group.  The first char in the string
01727        *  represents the number of digits in the least significant
01728        *  group.  If a char is negative, it indicates an unlimited
01729        *  number of digits for the group.  If more chars from the
01730        *  string are required to group a number, the last char is used
01731        *  repeatedly.
01732        *
01733        *  For example, if the grouping() returns "\003\002" and is
01734        *  applied to the number 123456789, this corresponds to
01735        *  12,34,56,789.  Note that if the string was "32", this would
01736        *  put more than 50 digits into the least significant group if
01737        *  the character set is ASCII.
01738        *
01739        *  The string is returned by calling
01740        *  numpunct<char_type>::do_grouping().
01741        *
01742        *  @return  string representing grouping specification.
01743       */
01744       string
01745       grouping() const
01746       { return this->do_grouping(); }
01747 
01748       /**
01749        *  @brief  Return string representation of bool true.
01750        *
01751        *  This function returns a string_type containing the text
01752        *  representation for true bool variables.  It does so by calling
01753        *  numpunct<char_type>::do_truename().
01754        *
01755        *  @return  string_type representing printed form of true.
01756       */
01757       string_type
01758       truename() const
01759       { return this->do_truename(); }
01760 
01761       /**
01762        *  @brief  Return string representation of bool false.
01763        *
01764        *  This function returns a string_type containing the text
01765        *  representation for false bool variables.  It does so by calling
01766        *  numpunct<char_type>::do_falsename().
01767        *
01768        *  @return  string_type representing printed form of false.
01769       */
01770       string_type
01771       falsename() const
01772       { return this->do_falsename(); }
01773 
01774     protected:
01775       /// Destructor.
01776       virtual
01777       ~numpunct();
01778 
01779       /**
01780        *  @brief  Return decimal point character.
01781        *
01782        *  Returns a char_type to use as a decimal point.  This function is a
01783        *  hook for derived classes to change the value returned.
01784        *
01785        *  @return  @a char_type representing a decimal point.
01786       */
01787       virtual char_type
01788       do_decimal_point() const
01789       { return _M_data->_M_decimal_point; }
01790 
01791       /**
01792        *  @brief  Return thousands separator character.
01793        *
01794        *  Returns a char_type to use as a thousands separator.  This function
01795        *  is a hook for derived classes to change the value returned.
01796        *
01797        *  @return  @a char_type representing a thousands separator.
01798       */
01799       virtual char_type
01800       do_thousands_sep() const
01801       { return _M_data->_M_thousands_sep; }
01802 
01803       /**
01804        *  @brief  Return grouping specification.
01805        *
01806        *  Returns a string representing groupings for the integer part of a
01807        *  number.  This function is a hook for derived classes to change the
01808        *  value returned.  @see grouping() for details.
01809        *
01810        *  @return  String representing grouping specification.
01811       */
01812       virtual string
01813       do_grouping() const
01814       { return _M_data->_M_grouping; }
01815 
01816       /**
01817        *  @brief  Return string representation of bool true.
01818        *
01819        *  Returns a string_type containing the text representation for true
01820        *  bool variables.  This function is a hook for derived classes to
01821        *  change the value returned.
01822        *
01823        *  @return  string_type representing printed form of true.
01824       */
01825       virtual string_type
01826       do_truename() const
01827       { return _M_data->_M_truename; }
01828 
01829       /**
01830        *  @brief  Return string representation of bool false.
01831        *
01832        *  Returns a string_type containing the text representation for false
01833        *  bool variables.  This function is a hook for derived classes to
01834        *  change the value returned.
01835        *
01836        *  @return  string_type representing printed form of false.
01837       */
01838       virtual string_type
01839       do_falsename() const
01840       { return _M_data->_M_falsename; }
01841 
01842       // For use at construction time only.
01843       void
01844       _M_initialize_numpunct(__c_locale __cloc = NULL);
01845     };
01846 
01847   template<typename _CharT>
01848     locale::id numpunct<_CharT>::id;
01849 
01850   template<>
01851     numpunct<char>::~numpunct();
01852 
01853   template<>
01854     void
01855     numpunct<char>::_M_initialize_numpunct(__c_locale __cloc);
01856 
01857 #ifdef _GLIBCXX_USE_WCHAR_T
01858   template<>
01859     numpunct<wchar_t>::~numpunct();
01860 
01861   template<>
01862     void
01863     numpunct<wchar_t>::_M_initialize_numpunct(__c_locale __cloc);
01864 #endif
01865 
01866   /// class numpunct_byname [22.2.3.2].
01867   template<typename _CharT>
01868     class numpunct_byname : public numpunct<_CharT>
01869     {
01870     public:
01871       typedef _CharT            char_type;
01872       typedef basic_string<_CharT>  string_type;
01873 
01874       explicit
01875       numpunct_byname(const char* __s, size_t __refs = 0)
01876       : numpunct<_CharT>(__refs)
01877       {
01878     if (__builtin_strcmp(__s, "C") != 0
01879         && __builtin_strcmp(__s, "POSIX") != 0)
01880       {
01881         __c_locale __tmp;
01882         this->_S_create_c_locale(__tmp, __s);
01883         this->_M_initialize_numpunct(__tmp);
01884         this->_S_destroy_c_locale(__tmp);
01885       }
01886       }
01887 
01888     protected:
01889       virtual
01890       ~numpunct_byname() { }
01891     };
01892 
01893 _GLIBCXX_BEGIN_LDBL_NAMESPACE
01894 
01895   /**
01896    *  @brief  Facet for parsing number strings.
01897    *
01898    *  This facet encapsulates the code to parse and return a number
01899    *  from a string.  It is used by the istream numeric extraction
01900    *  operators.
01901    *
01902    *  The num_get template uses protected virtual functions to provide the
01903    *  actual results.  The public accessors forward the call to the virtual
01904    *  functions.  These virtual functions are hooks for developers to
01905    *  implement the behavior they require from the num_get facet.
01906   */
01907   template<typename _CharT, typename _InIter>
01908     class num_get : public locale::facet
01909     {
01910     public:
01911       // Types:
01912       //@{
01913       /// Public typedefs
01914       typedef _CharT            char_type;
01915       typedef _InIter           iter_type;
01916       //@}
01917 
01918       /// Numpunct facet id.
01919       static locale::id         id;
01920 
01921       /**
01922        *  @brief  Constructor performs initialization.
01923        *
01924        *  This is the constructor provided by the standard.
01925        *
01926        *  @param refs  Passed to the base facet class.
01927       */
01928       explicit
01929       num_get(size_t __refs = 0) : facet(__refs) { }
01930 
01931       /**
01932        *  @brief  Numeric parsing.
01933        *
01934        *  Parses the input stream into the bool @a v.  It does so by calling
01935        *  num_get::do_get().
01936        *
01937        *  If ios_base::boolalpha is set, attempts to read
01938        *  ctype<CharT>::truename() or ctype<CharT>::falsename().  Sets
01939        *  @a v to true or false if successful.  Sets err to
01940        *  ios_base::failbit if reading the string fails.  Sets err to
01941        *  ios_base::eofbit if the stream is emptied.
01942        *
01943        *  If ios_base::boolalpha is not set, proceeds as with reading a long,
01944        *  except if the value is 1, sets @a v to true, if the value is 0, sets
01945        *  @a v to false, and otherwise set err to ios_base::failbit.
01946        *
01947        *  @param  in  Start of input stream.
01948        *  @param  end  End of input stream.
01949        *  @param  io  Source of locale and flags.
01950        *  @param  err  Error flags to set.
01951        *  @param  v  Value to format and insert.
01952        *  @return  Iterator after reading.
01953       */
01954       iter_type
01955       get(iter_type __in, iter_type __end, ios_base& __io,
01956       ios_base::iostate& __err, bool& __v) const
01957       { return this->do_get(__in, __end, __io, __err, __v); }
01958 
01959       //@{
01960       /**
01961        *  @brief  Numeric parsing.
01962        *
01963        *  Parses the input stream into the integral variable @a v.  It does so
01964        *  by calling num_get::do_get().
01965        *
01966        *  Parsing is affected by the flag settings in @a io.
01967        *
01968        *  The basic parse is affected by the value of io.flags() &
01969        *  ios_base::basefield.  If equal to ios_base::oct, parses like the
01970        *  scanf %o specifier.  Else if equal to ios_base::hex, parses like %X
01971        *  specifier.  Else if basefield equal to 0, parses like the %i
01972        *  specifier.  Otherwise, parses like %d for signed and %u for unsigned
01973        *  types.  The matching type length modifier is also used.
01974        *
01975        *  Digit grouping is interpreted according to numpunct::grouping() and
01976        *  numpunct::thousands_sep().  If the pattern of digit groups isn't
01977        *  consistent, sets err to ios_base::failbit.
01978        *
01979        *  If parsing the string yields a valid value for @a v, @a v is set.
01980        *  Otherwise, sets err to ios_base::failbit and leaves @a v unaltered.
01981        *  Sets err to ios_base::eofbit if the stream is emptied.
01982        *
01983        *  @param  in  Start of input stream.
01984        *  @param  end  End of input stream.
01985        *  @param  io  Source of locale and flags.
01986        *  @param  err  Error flags to set.
01987        *  @param  v  Value to format and insert.
01988        *  @return  Iterator after reading.
01989       */
01990       iter_type
01991       get(iter_type __in, iter_type __end, ios_base& __io,
01992       ios_base::iostate& __err, long& __v) const
01993       { return this->do_get(__in, __end, __io, __err, __v); }
01994 
01995       iter_type
01996       get(iter_type __in, iter_type __end, ios_base& __io,
01997       ios_base::iostate& __err, unsigned short& __v) const
01998       { return this->do_get(__in, __end, __io, __err, __v); }
01999 
02000       iter_type
02001       get(iter_type __in, iter_type __end, ios_base& __io,
02002       ios_base::iostate& __err, unsigned int& __v)   const
02003       { return this->do_get(__in, __end, __io, __err, __v); }
02004 
02005       iter_type
02006       get(iter_type __in, iter_type __end, ios_base& __io,
02007       ios_base::iostate& __err, unsigned long& __v)  const
02008       { return this->do_get(__in, __end, __io, __err, __v); }
02009 
02010 #ifdef _GLIBCXX_USE_LONG_LONG
02011       iter_type
02012       get(iter_type __in, iter_type __end, ios_base& __io,
02013       ios_base::iostate& __err, long long& __v) const
02014       { return this->do_get(__in, __end, __io, __err, __v); }
02015 
02016       iter_type
02017       get(iter_type __in, iter_type __end, ios_base& __io,
02018       ios_base::iostate& __err, unsigned long long& __v)  const
02019       { return this->do_get(__in, __end, __io, __err, __v); }
02020 #endif
02021       //@}
02022 
02023       //@{
02024       /**
02025        *  @brief  Numeric parsing.
02026        *
02027        *  Parses the input stream into the integral variable @a v.  It does so
02028        *  by calling num_get::do_get().
02029        *
02030        *  The input characters are parsed like the scanf %g specifier.  The
02031        *  matching type length modifier is also used.
02032        *
02033        *  The decimal point character used is numpunct::decimal_point().
02034        *  Digit grouping is interpreted according to numpunct::grouping() and
02035        *  numpunct::thousands_sep().  If the pattern of digit groups isn't
02036        *  consistent, sets err to ios_base::failbit.
02037        *
02038        *  If parsing the string yields a valid value for @a v, @a v is set.
02039        *  Otherwise, sets err to ios_base::failbit and leaves @a v unaltered.
02040        *  Sets err to ios_base::eofbit if the stream is emptied.
02041        *
02042        *  @param  in  Start of input stream.
02043        *  @param  end  End of input stream.
02044        *  @param  io  Source of locale and flags.
02045        *  @param  err  Error flags to set.
02046        *  @param  v  Value to format and insert.
02047        *  @return  Iterator after reading.
02048       */
02049       iter_type
02050       get(iter_type __in, iter_type __end, ios_base& __io,
02051       ios_base::iostate& __err, float& __v) const
02052       { return this->do_get(__in, __end, __io, __err, __v); }
02053 
02054       iter_type
02055       get(iter_type __in, iter_type __end, ios_base& __io,
02056       ios_base::iostate& __err, double& __v) const
02057       { return this->do_get(__in, __end, __io, __err, __v); }
02058 
02059       iter_type
02060       get(iter_type __in, iter_type __end, ios_base& __io,
02061       ios_base::iostate& __err, long double& __v) const
02062       { return this->do_get(__in, __end, __io, __err, __v); }
02063       //@}
02064 
02065       /**
02066        *  @brief  Numeric parsing.
02067        *
02068        *  Parses the input stream into the pointer variable @a v.  It does so
02069        *  by calling num_get::do_get().
02070        *
02071        *  The input characters are parsed like the scanf %p specifier.
02072        *
02073        *  Digit grouping is interpreted according to numpunct::grouping() and
02074        *  numpunct::thousands_sep().  If the pattern of digit groups isn't
02075        *  consistent, sets err to ios_base::failbit.
02076        *
02077        *  Note that the digit grouping effect for pointers is a bit ambiguous
02078        *  in the standard and shouldn't be relied on.  See DR 344.
02079        *
02080        *  If parsing the string yields a valid value for @a v, @a v is set.
02081        *  Otherwise, sets err to ios_base::failbit and leaves @a v unaltered.
02082        *  Sets err to ios_base::eofbit if the stream is emptied.
02083        *
02084        *  @param  in  Start of input stream.
02085        *  @param  end  End of input stream.
02086        *  @param  io  Source of locale and flags.
02087        *  @param  err  Error flags to set.
02088        *  @param  v  Value to format and insert.
02089        *  @return  Iterator after reading.
02090       */
02091       iter_type
02092       get(iter_type __in, iter_type __end, ios_base& __io,
02093       ios_base::iostate& __err, void*& __v) const
02094       { return this->do_get(__in, __end, __io, __err, __v); }
02095 
02096     protected:
02097       /// Destructor.
02098       virtual ~num_get() { }
02099 
02100       iter_type
02101       _M_extract_float(iter_type, iter_type, ios_base&, ios_base::iostate&,
02102                string&) const;
02103 
02104       template<typename _ValueT>
02105         iter_type
02106         _M_extract_int(iter_type, iter_type, ios_base&, ios_base::iostate&,
02107                _ValueT&) const;
02108 
02109       template<typename _CharT2>
02110       typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value, int>::__type
02111         _M_find(const _CharT2*, size_t __len, _CharT2 __c) const
02112         {
02113       int __ret = -1;
02114       if (__len <= 10)
02115         {
02116           if (__c >= _CharT2('0') && __c < _CharT2(_CharT2('0') + __len))
02117         __ret = __c - _CharT2('0');
02118         }
02119       else
02120         {
02121           if (__c >= _CharT2('0') && __c <= _CharT2('9'))
02122         __ret = __c - _CharT2('0');
02123           else if (__c >= _CharT2('a') && __c <= _CharT2('f'))
02124         __ret = 10 + (__c - _CharT2('a'));
02125           else if (__c >= _CharT2('A') && __c <= _CharT2('F'))
02126         __ret = 10 + (__c - _CharT2('A'));
02127         }
02128       return __ret;
02129     }
02130 
02131       template<typename _CharT2>
02132       typename __gnu_cxx::__enable_if<!__is_char<_CharT2>::__value, 
02133                       int>::__type
02134         _M_find(const _CharT2* __zero, size_t __len, _CharT2 __c) const
02135         {
02136       int __ret = -1;
02137       const char_type* __q = char_traits<_CharT2>::find(__zero, __len, __c);
02138       if (__q)
02139         {
02140           __ret = __q - __zero;
02141           if (__ret > 15)
02142         __ret -= 6;
02143         }
02144       return __ret;
02145     }
02146 
02147       //@{
02148       /**
02149        *  @brief  Numeric parsing.
02150        *
02151        *  Parses the input stream into the variable @a v.  This function is a
02152        *  hook for derived classes to change the value returned.  @see get()
02153        *  for more details.
02154        *
02155        *  @param  in  Start of input stream.
02156        *  @param  end  End of input stream.
02157        *  @param  io  Source of locale and flags.
02158        *  @param  err  Error flags to set.
02159        *  @param  v  Value to format and insert.
02160        *  @return  Iterator after reading.
02161       */
02162       virtual iter_type
02163       do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, bool&) const;
02164 
02165       virtual iter_type
02166       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02167          ios_base::iostate& __err, long& __v) const
02168       { return _M_extract_int(__beg, __end, __io, __err, __v); }
02169 
02170       virtual iter_type
02171       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02172          ios_base::iostate& __err, unsigned short& __v) const
02173       { return _M_extract_int(__beg, __end, __io, __err, __v); }
02174 
02175       virtual iter_type
02176       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02177          ios_base::iostate& __err, unsigned int& __v) const
02178       { return _M_extract_int(__beg, __end, __io, __err, __v); }
02179 
02180       virtual iter_type
02181       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02182          ios_base::iostate& __err, unsigned long& __v) const
02183       { return _M_extract_int(__beg, __end, __io, __err, __v); }
02184 
02185 #ifdef _GLIBCXX_USE_LONG_LONG
02186       virtual iter_type
02187       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02188          ios_base::iostate& __err, long long& __v) const
02189       { return _M_extract_int(__beg, __end, __io, __err, __v); }    
02190 
02191       virtual iter_type
02192       do_get(iter_type __beg, iter_type __end, ios_base& __io,
02193          ios_base::iostate& __err, unsigned long long& __v) const
02194       { return _M_extract_int(__beg, __end, __io, __err, __v); }
02195 #endif
02196 
02197       virtual iter_type
02198       do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02199          float&) const;
02200 
02201       virtual iter_type
02202       do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02203          double&) const;
02204 
02205       // XXX GLIBCXX_ABI Deprecated
02206 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
02207       virtual iter_type
02208       __do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02209            double&) const;
02210 #else
02211       virtual iter_type
02212       do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02213          long double&) const;
02214 #endif
02215 
02216       virtual iter_type
02217       do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02218          void*&) const;
02219 
02220       // XXX GLIBCXX_ABI Deprecated
02221 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
02222       virtual iter_type
02223       do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
02224          long double&) const;
02225 #endif
02226       //@}
02227     };
02228 
02229   template<typename _CharT, typename _InIter>
02230     locale::id num_get<_CharT, _InIter>::id;
02231 
02232 
02233   /**
02234    *  @brief  Facet for converting numbers to strings.
02235    *
02236    *  This facet encapsulates the code to convert a number to a string.  It is
02237    *  used by the ostream numeric insertion operators.
02238    *
02239    *  The num_put template uses protected virtual functions to provide the
02240    *  actual results.  The public accessors forward the call to the virtual
02241    *  functions.  These virtual functions are hooks for developers to
02242    *  implement the behavior they require from the num_put facet.
02243   */
02244   template<typename _CharT, typename _OutIter>
02245     class num_put : public locale::facet
02246     {
02247     public:
02248       // Types:
02249       //@{
02250       /// Public typedefs
02251       typedef _CharT        char_type;
02252       typedef _OutIter      iter_type;
02253       //@}
02254 
02255       /// Numpunct facet id.
02256       static locale::id     id;
02257 
02258       /**
02259        *  @brief  Constructor performs initialization.
02260        *
02261        *  This is the constructor provided by the standard.
02262        *
02263        *  @param refs  Passed to the base facet class.
02264       */
02265       explicit
02266       num_put(size_t __refs = 0) : facet(__refs) { }
02267 
02268       /**
02269        *  @brief  Numeric formatting.
02270        *
02271        *  Formats the boolean @a v and inserts it into a stream.  It does so
02272        *  by calling num_put::do_put().
02273        *
02274        *  If ios_base::boolalpha is set, writes ctype<CharT>::truename() or
02275        *  ctype<CharT>::falsename().  Otherwise formats @a v as an int.
02276        *
02277        *  @param  s  Stream to write to.
02278        *  @param  io  Source of locale and flags.
02279        *  @param  fill  Char_type to use for filling.
02280        *  @param  v  Value to format and insert.
02281        *  @return  Iterator after writing.
02282       */
02283       iter_type
02284       put(iter_type __s, ios_base& __f, char_type __fill, bool __v) const
02285       { return this->do_put(__s, __f, __fill, __v); }
02286 
02287       //@{
02288       /**
02289        *  @brief  Numeric formatting.
02290        *
02291        *  Formats the integral value @a v and inserts it into a
02292        *  stream.  It does so by calling num_put::do_put().
02293        *
02294        *  Formatting is affected by the flag settings in @a io.
02295        *
02296        *  The basic format is affected by the value of io.flags() &
02297        *  ios_base::basefield.  If equal to ios_base::oct, formats like the
02298        *  printf %o specifier.  Else if equal to ios_base::hex, formats like
02299        *  %x or %X with ios_base::uppercase unset or set respectively.
02300        *  Otherwise, formats like %d, %ld, %lld for signed and %u, %lu, %llu
02301        *  for unsigned values.  Note that if both oct and hex are set, neither
02302        *  will take effect.
02303        *
02304        *  If ios_base::showpos is set, '+' is output before positive values.
02305        *  If ios_base::showbase is set, '0' precedes octal values (except 0)
02306        *  and '0[xX]' precedes hex values.
02307        *
02308        *  Thousands separators are inserted according to numpunct::grouping()
02309        *  and numpunct::thousands_sep().  The decimal point character used is
02310        *  numpunct::decimal_point().
02311        *
02312        *  If io.width() is non-zero, enough @a fill characters are inserted to
02313        *  make the result at least that wide.  If
02314        *  (io.flags() & ios_base::adjustfield) == ios_base::left, result is
02315        *  padded at the end.  If ios_base::internal, then padding occurs
02316        *  immediately after either a '+' or '-' or after '0x' or '0X'.
02317        *  Otherwise, padding occurs at the beginning.
02318        *
02319        *  @param  s  Stream to write to.
02320        *  @param  io  Source of locale and flags.
02321        *  @param  fill  Char_type to use for filling.
02322        *  @param  v  Value to format and insert.
02323        *  @return  Iterator after writing.
02324       */
02325       iter_type
02326       put(iter_type __s, ios_base& __f, char_type __fill, long __v) const
02327       { return this->do_put(__s, __f, __fill, __v); }
02328 
02329       iter_type
02330       put(iter_type __s, ios_base& __f, char_type __fill,
02331       unsigned long __v) const
02332       { return this->do_put(__s, __f, __fill, __v); }
02333 
02334 #ifdef _GLIBCXX_USE_LONG_LONG
02335       iter_type
02336       put(iter_type __s, ios_base& __f, char_type __fill, long long __v) const
02337       { return this->do_put(__s, __f, __fill, __v); }
02338 
02339       iter_type
02340       put(iter_type __s, ios_base& __f, char_type __fill,
02341       unsigned long long __v) const
02342       { return this->do_put(__s, __f, __fill, __v); }
02343 #endif
02344       //@}
02345 
02346       //@{
02347       /**
02348        *  @brief  Numeric formatting.
02349        *
02350        *  Formats the floating point value @a v and inserts it into a stream.
02351        *  It does so by calling num_put::do_put().
02352        *
02353        *  Formatting is affected by the flag settings in @a io.
02354        *
02355        *  The basic format is affected by the value of io.flags() &
02356        *  ios_base::floatfield.  If equal to ios_base::fixed, formats like the
02357        *  printf %f specifier.  Else if equal to ios_base::scientific, formats
02358        *  like %e or %E with ios_base::uppercase unset or set respectively.
02359        *  Otherwise, formats like %g or %G depending on uppercase.  Note that
02360        *  if both fixed and scientific are set, the effect will also be like
02361        *  %g or %G.
02362        *
02363        *  The output precision is given by io.precision().  This precision is
02364        *  capped at numeric_limits::digits10 + 2 (different for double and
02365        *  long double).  The default precision is 6.
02366        *
02367        *  If ios_base::showpos is set, '+' is output before positive values.
02368        *  If ios_base::showpoint is set, a decimal point will always be
02369        *  output.
02370        *
02371        *  Thousands separators are inserted according to numpunct::grouping()
02372        *  and numpunct::thousands_sep().  The decimal point character used is
02373        *  numpunct::decimal_point().
02374        *
02375        *  If io.width() is non-zero, enough @a fill characters are inserted to
02376        *  make the result at least that wide.  If
02377        *  (io.flags() & ios_base::adjustfield) == ios_base::left, result is
02378        *  padded at the end.  If ios_base::internal, then padding occurs
02379        *  immediately after either a '+' or '-' or after '0x' or '0X'.
02380        *  Otherwise, padding occurs at the beginning.
02381        *
02382        *  @param  s  Stream to write to.
02383        *  @param  io  Source of locale and flags.
02384        *  @param  fill  Char_type to use for filling.
02385        *  @param  v  Value to format and insert.
02386        *  @return  Iterator after writing.
02387       */
02388       iter_type
02389       put(iter_type __s, ios_base& __f, char_type __fill, double __v) const
02390       { return this->do_put(__s, __f, __fill, __v); }
02391 
02392       iter_type
02393       put(iter_type __s, ios_base& __f, char_type __fill,
02394       long double __v) const
02395       { return this->do_put(__s, __f, __fill, __v); }
02396       //@}
02397 
02398       /**
02399        *  @brief  Numeric formatting.
02400        *
02401        *  Formats the pointer value @a v and inserts it into a stream.  It
02402        *  does so by calling num_put::do_put().
02403        *
02404        *  This function formats @a v as an unsigned long with ios_base::hex
02405        *  and ios_base::showbase set.
02406        *
02407        *  @param  s  Stream to write to.
02408        *  @param  io  Source of locale and flags.
02409        *  @param  fill  Char_type to use for filling.
02410        *  @param  v  Value to format and insert.
02411        *  @return  Iterator after writing.
02412       */
02413       iter_type
02414       put(iter_type __s, ios_base& __f, char_type __fill,
02415       const void* __v) const
02416       { return this->do_put(__s, __f, __fill, __v); }
02417 
02418     protected:
02419       template<typename _ValueT>
02420         iter_type
02421         _M_insert_float(iter_type, ios_base& __io, char_type __fill,
02422             char __mod, _ValueT __v) const;
02423 
02424       void
02425       _M_group_float(const char* __grouping, size_t __grouping_size,
02426              char_type __sep, const char_type* __p, char_type* __new,
02427              char_type* __cs, int& __len) const;
02428 
02429       template<typename _ValueT>
02430         iter_type
02431         _M_insert_int(iter_type, ios_base& __io, char_type __fill,
02432               _ValueT __v) const;
02433 
02434       void
02435       _M_group_int(const char* __grouping, size_t __grouping_size,
02436            char_type __sep, ios_base& __io, char_type* __new,
02437            char_type* __cs, int& __len) const;
02438 
02439       void
02440       _M_pad(char_type __fill, streamsize __w, ios_base& __io,
02441          char_type* __new, const char_type* __cs, int& __len) const;
02442 
02443       /// Destructor.
02444       virtual
02445       ~num_put() { };
02446 
02447       //@{
02448       /**
02449        *  @brief  Numeric formatting.
02450        *
02451        *  These functions do the work of formatting numeric values and
02452        *  inserting them into a stream. This function is a hook for derived
02453        *  classes to change the value returned.
02454        *
02455        *  @param  s  Stream to write to.
02456        *  @param  io  Source of locale and flags.
02457        *  @param  fill  Char_type to use for filling.
02458        *  @param  v  Value to format and insert.
02459        *  @return  Iterator after writing.
02460       */
02461       virtual iter_type
02462       do_put(iter_type, ios_base&, char_type __fill, bool __v) const;
02463 
02464       virtual iter_type
02465       do_put(iter_type __s, ios_base& __io, char_type __fill, long __v) const
02466       { return _M_insert_int(__s, __io, __fill, __v); } 
02467 
02468       virtual iter_type
02469       do_put(iter_type __s, ios_base& __io, char_type __fill,
02470          unsigned long __v) const
02471       { return _M_insert_int(__s, __io, __fill, __v); }
02472 
02473 #ifdef _GLIBCXX_USE_LONG_LONG
02474       virtual iter_type
02475       do_put(iter_type __s, ios_base& __io, char_type __fill,
02476          long long __v) const
02477       { return _M_insert_int(__s, __io, __fill, __v); }
02478 
02479       virtual iter_type
02480       do_put(iter_type __s, ios_base& __io, char_type __fill,
02481          unsigned long long __v) const
02482       { return _M_insert_int(__s, __io, __fill, __v); }
02483 #endif
02484 
02485       virtual iter_type
02486       do_put(iter_type, ios_base&, char_type __fill, double __v) const;
02487 
02488       // XXX GLIBCXX_ABI Deprecated
02489 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
02490       virtual iter_type
02491       __do_put(iter_type, ios_base&, char_type __fill, double __v) const;
02492 #else
02493       virtual iter_type
02494       do_put(iter_type, ios_base&, char_type __fill, long double __v) const;
02495 #endif
02496 
02497       virtual iter_type
02498       do_put(iter_type, ios_base&, char_type __fill, const void* __v) const;
02499 
02500       // XXX GLIBCXX_ABI Deprecated
02501 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
02502       virtual iter_type
02503       do_put(iter_type, ios_base&, char_type __fill, long double __v) const;
02504 #endif
02505       //@}
02506     };
02507 
02508   template <typename _CharT, typename _OutIter>
02509     locale::id num_put<_CharT, _OutIter>::id;
02510 
02511 _GLIBCXX_END_LDBL_NAMESPACE
02512 
02513   // Subclause convenience interfaces, inlines.
02514   // NB: These are inline because, when used in a loop, some compilers
02515   // can hoist the body out of the loop; then it's just as fast as the
02516   // C is*() function.
02517 
02518   /// Convenience interface to ctype.is(ctype_base::space, __c).
02519   template<typename _CharT>
02520     inline bool
02521     isspace(_CharT __c, const locale& __loc)
02522     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::space, __c); }
02523 
02524   /// Convenience interface to ctype.is(ctype_base::print, __c).
02525   template<typename _CharT>
02526     inline bool
02527     isprint(_CharT __c, const locale& __loc)
02528     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::print, __c); }
02529 
02530   /// Convenience interface to ctype.is(ctype_base::cntrl, __c).
02531   template<typename _CharT>
02532     inline bool
02533     iscntrl(_CharT __c, const locale& __loc)
02534     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::cntrl, __c); }
02535 
02536   /// Convenience interface to ctype.is(ctype_base::upper, __c).
02537   template<typename _CharT>
02538     inline bool
02539     isupper(_CharT __c, const locale& __loc)
02540     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::upper, __c); }
02541 
02542   /// Convenience interface to ctype.is(ctype_base::lower, __c).
02543   template<typename _CharT>
02544     inline bool 
02545     islower(_CharT __c, const locale& __loc)
02546     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::lower, __c); }
02547 
02548   /// Convenience interface to ctype.is(ctype_base::alpha, __c).
02549   template<typename _CharT>
02550     inline bool
02551     isalpha(_CharT __c, const locale& __loc)
02552     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alpha, __c); }
02553 
02554   /// Convenience interface to ctype.is(ctype_base::digit, __c).
02555   template<typename _CharT>
02556     inline bool
02557     isdigit(_CharT __c, const locale& __loc)
02558     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::digit, __c); }
02559 
02560   /// Convenience interface to ctype.is(ctype_base::punct, __c).
02561   template<typename _CharT>
02562     inline bool
02563     ispunct(_CharT __c, const locale& __loc)
02564     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::punct, __c); }
02565 
02566   /// Convenience interface to ctype.is(ctype_base::xdigit, __c).
02567   template<typename _CharT>
02568     inline bool
02569     isxdigit(_CharT __c, const locale& __loc)
02570     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::xdigit, __c); }
02571 
02572   /// Convenience interface to ctype.is(ctype_base::alnum, __c).
02573   template<typename _CharT>
02574     inline bool
02575     isalnum(_CharT __c, const locale& __loc)
02576     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alnum, __c); }
02577 
02578   /// Convenience interface to ctype.is(ctype_base::graph, __c).
02579   template<typename _CharT>
02580     inline bool
02581     isgraph(_CharT __c, const locale& __loc)
02582     { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::graph, __c); }
02583 
02584   /// Convenience interface to ctype.toupper(__c).
02585   template<typename _CharT>
02586     inline _CharT
02587     toupper(_CharT __c, const locale& __loc)
02588     { return use_facet<ctype<_CharT> >(__loc).toupper(__c); }
02589 
02590   /// Convenience interface to ctype.tolower(__c).
02591   template<typename _CharT>
02592     inline _CharT
02593     tolower(_CharT __c, const locale& __loc)
02594     { return use_facet<ctype<_CharT> >(__loc).tolower(__c); }
02595 
02596 _GLIBCXX_END_NAMESPACE
02597 
02598 #ifndef _GLIBCXX_EXPORT_TEMPLATE
02599 # include <bits/locale_facets.tcc>
02600 #endif
02601 
02602 #endif

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