vstring.tcc

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00001 // Versatile string -*- C++ -*-
00002 
00003 // Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 /** @file ext/vstring.tcc
00031  *  This file is a GNU extension to the Standard C++ Library.
00032  *  This is an internal header file, included by other library headers.
00033  *  You should not attempt to use it directly.
00034  */
00035 
00036 #ifndef _VSTRING_TCC
00037 #define _VSTRING_TCC 1
00038 
00039 #pragma GCC system_header
00040 
00041 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
00042 
00043   template<typename _CharT, typename _Traits, typename _Alloc,
00044        template <typename, typename, typename> class _Base>
00045     const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00046     __versa_string<_CharT, _Traits, _Alloc, _Base>::npos;
00047 
00048   template<typename _CharT, typename _Traits, typename _Alloc,
00049        template <typename, typename, typename> class _Base>
00050     void
00051     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00052     resize(size_type __n, _CharT __c)
00053     {
00054       const size_type __size = this->size();
00055       if (__size < __n)
00056     this->append(__n - __size, __c);
00057       else if (__n < __size)
00058     this->_M_erase(__n, __size - __n);
00059     }
00060 
00061   template<typename _CharT, typename _Traits, typename _Alloc,
00062        template <typename, typename, typename> class _Base>
00063     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00064     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00065     _M_append(const _CharT* __s, size_type __n)
00066     {
00067       const size_type __len = __n + this->size();
00068 
00069       if (__len <= this->capacity() && !this->_M_is_shared())
00070     {
00071       if (__n)
00072         this->_S_copy(this->_M_data() + this->size(), __s, __n);
00073     }
00074       else
00075     this->_M_mutate(this->size(), size_type(0), __s, __n);
00076 
00077       this->_M_set_length(__len);
00078       return *this;
00079     }
00080 
00081   template<typename _CharT, typename _Traits, typename _Alloc,
00082        template <typename, typename, typename> class _Base>
00083     template<typename _InputIterator>
00084       __versa_string<_CharT, _Traits, _Alloc, _Base>&
00085       __versa_string<_CharT, _Traits, _Alloc, _Base>::
00086       _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
00087               _InputIterator __k2, std::__false_type)
00088       {
00089     const __versa_string __s(__k1, __k2);
00090     const size_type __n1 = __i2 - __i1;
00091     return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(),
00092               __s.size());
00093       }
00094 
00095   template<typename _CharT, typename _Traits, typename _Alloc,
00096        template <typename, typename, typename> class _Base>
00097     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00098     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00099     _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
00100            _CharT __c)
00101     {
00102       _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux");
00103 
00104       const size_type __old_size = this->size();
00105       const size_type __new_size = __old_size + __n2 - __n1;
00106 
00107       if (__new_size <= this->capacity() && !this->_M_is_shared())
00108     {
00109       _CharT* __p = this->_M_data() + __pos1;
00110 
00111       const size_type __how_much = __old_size - __pos1 - __n1;
00112       if (__how_much && __n1 != __n2)
00113         this->_S_move(__p + __n2, __p + __n1, __how_much);
00114     }
00115       else
00116     this->_M_mutate(__pos1, __n1, 0, __n2);
00117 
00118       if (__n2)
00119     this->_S_assign(this->_M_data() + __pos1, __n2, __c);
00120 
00121       this->_M_set_length(__new_size);
00122       return *this;
00123     }
00124 
00125   template<typename _CharT, typename _Traits, typename _Alloc,
00126        template <typename, typename, typename> class _Base>
00127     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00128     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00129     _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
00130            const size_type __len2)
00131     {
00132       _M_check_length(__len1, __len2, "__versa_string::_M_replace");
00133 
00134       const size_type __old_size = this->size();
00135       const size_type __new_size = __old_size + __len2 - __len1;
00136       
00137       if (__new_size <= this->capacity() && !this->_M_is_shared())
00138     {
00139       _CharT* __p = this->_M_data() + __pos;
00140 
00141       const size_type __how_much = __old_size - __pos - __len1;
00142       if (_M_disjunct(__s))
00143         {
00144           if (__how_much && __len1 != __len2)
00145         this->_S_move(__p + __len2, __p + __len1, __how_much);
00146           if (__len2)
00147         this->_S_copy(__p, __s, __len2);
00148         }
00149       else
00150         {
00151           // Work in-place.
00152           if (__len2 && __len2 <= __len1)
00153         this->_S_move(__p, __s, __len2);
00154           if (__how_much && __len1 != __len2)
00155         this->_S_move(__p + __len2, __p + __len1, __how_much);
00156           if (__len2 > __len1)
00157         {
00158           if (__s + __len2 <= __p + __len1)
00159             this->_S_move(__p, __s, __len2);
00160           else if (__s >= __p + __len1)
00161             this->_S_copy(__p, __s + __len2 - __len1, __len2);
00162           else
00163             {
00164               const size_type __nleft = (__p + __len1) - __s;
00165               this->_S_move(__p, __s, __nleft);
00166               this->_S_copy(__p + __nleft, __p + __len2,
00167                     __len2 - __nleft);
00168             }
00169         }
00170         }
00171     }
00172       else
00173     this->_M_mutate(__pos, __len1, __s, __len2);
00174 
00175       this->_M_set_length(__new_size);
00176       return *this;
00177     }
00178   
00179   template<typename _CharT, typename _Traits, typename _Alloc,
00180        template <typename, typename, typename> class _Base>
00181     __versa_string<_CharT, _Traits, _Alloc, _Base>
00182     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00183           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00184     {
00185       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00186       __str.reserve(__lhs.size() + __rhs.size());
00187       __str.append(__lhs);
00188       __str.append(__rhs);
00189       return __str;
00190     }
00191 
00192   template<typename _CharT, typename _Traits, typename _Alloc,
00193        template <typename, typename, typename> class _Base>
00194     __versa_string<_CharT, _Traits, _Alloc, _Base>
00195     operator+(const _CharT* __lhs,
00196           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00197     {
00198       __glibcxx_requires_string(__lhs);
00199       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
00200       typedef typename __string_type::size_type   __size_type;
00201       const __size_type __len = _Traits::length(__lhs);
00202       __string_type __str;
00203       __str.reserve(__len + __rhs.size());
00204       __str.append(__lhs, __len);
00205       __str.append(__rhs);
00206       return __str;
00207     }
00208 
00209   template<typename _CharT, typename _Traits, typename _Alloc,
00210        template <typename, typename, typename> class _Base>
00211     __versa_string<_CharT, _Traits, _Alloc, _Base>
00212     operator+(_CharT __lhs,
00213           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00214     {
00215       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00216       __str.reserve(__rhs.size() + 1);
00217       __str.push_back(__lhs);
00218       __str.append(__rhs);
00219       return __str;
00220     }
00221 
00222   template<typename _CharT, typename _Traits, typename _Alloc,
00223        template <typename, typename, typename> class _Base>
00224     __versa_string<_CharT, _Traits, _Alloc, _Base>
00225     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00226           const _CharT* __rhs)
00227     {
00228       __glibcxx_requires_string(__rhs);
00229       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
00230       typedef typename __string_type::size_type   __size_type;
00231       const __size_type __len = _Traits::length(__rhs);
00232       __string_type __str;
00233       __str.reserve(__lhs.size() + __len);
00234       __str.append(__lhs);
00235       __str.append(__rhs, __len);
00236       return __str;
00237     }
00238 
00239   template<typename _CharT, typename _Traits, typename _Alloc,
00240        template <typename, typename, typename> class _Base>
00241     __versa_string<_CharT, _Traits, _Alloc, _Base>
00242     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00243           _CharT __rhs)
00244     {
00245       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00246       __str.reserve(__lhs.size() + 1);
00247       __str.append(__lhs);
00248       __str.push_back(__rhs);
00249       return __str;
00250     }
00251 
00252   template<typename _CharT, typename _Traits, typename _Alloc,
00253        template <typename, typename, typename> class _Base>
00254     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00255     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00256     copy(_CharT* __s, size_type __n, size_type __pos) const
00257     {
00258       _M_check(__pos, "__versa_string::copy");
00259       __n = _M_limit(__pos, __n);
00260       __glibcxx_requires_string_len(__s, __n);
00261       if (__n)
00262     this->_S_copy(__s, this->_M_data() + __pos, __n);
00263       // 21.3.5.7 par 3: do not append null.  (good.)
00264       return __n;
00265     }
00266 
00267   template<typename _CharT, typename _Traits, typename _Alloc,
00268        template <typename, typename, typename> class _Base>
00269     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00270     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00271     find(const _CharT* __s, size_type __pos, size_type __n) const
00272     {
00273       __glibcxx_requires_string_len(__s, __n);
00274       const size_type __size = this->size();
00275       const _CharT* __data = this->_M_data();
00276 
00277       if (__n == 0)
00278     return __pos <= __size ? __pos : npos;
00279 
00280       if (__n <= __size)
00281     {
00282       for (; __pos <= __size - __n; ++__pos)
00283         if (traits_type::eq(__data[__pos], __s[0])
00284         && traits_type::compare(__data + __pos + 1,
00285                     __s + 1, __n - 1) == 0)
00286           return __pos;
00287     }
00288       return npos;
00289     }
00290 
00291   template<typename _CharT, typename _Traits, typename _Alloc,
00292        template <typename, typename, typename> class _Base>
00293     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00294     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00295     find(_CharT __c, size_type __pos) const
00296     {
00297       size_type __ret = npos;
00298       const size_type __size = this->size();
00299       if (__pos < __size)
00300     {
00301       const _CharT* __data = this->_M_data();
00302       const size_type __n = __size - __pos;
00303       const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
00304       if (__p)
00305         __ret = __p - __data;
00306     }
00307       return __ret;
00308     }
00309 
00310   template<typename _CharT, typename _Traits, typename _Alloc,
00311        template <typename, typename, typename> class _Base>
00312     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00313     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00314     rfind(const _CharT* __s, size_type __pos, size_type __n) const
00315     {
00316       __glibcxx_requires_string_len(__s, __n);
00317       const size_type __size = this->size();
00318       if (__n <= __size)
00319     {
00320       __pos = std::min(size_type(__size - __n), __pos);
00321       const _CharT* __data = this->_M_data();
00322       do
00323         {
00324           if (traits_type::compare(__data + __pos, __s, __n) == 0)
00325         return __pos;
00326         }
00327       while (__pos-- > 0);
00328     }
00329       return npos;
00330     }
00331 
00332   template<typename _CharT, typename _Traits, typename _Alloc,
00333        template <typename, typename, typename> class _Base>
00334     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00335     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00336     rfind(_CharT __c, size_type __pos) const
00337     {
00338       size_type __size = this->size();
00339       if (__size)
00340     {
00341       if (--__size > __pos)
00342         __size = __pos;
00343       for (++__size; __size-- > 0; )
00344         if (traits_type::eq(this->_M_data()[__size], __c))
00345           return __size;
00346     }
00347       return npos;
00348     }
00349 
00350   template<typename _CharT, typename _Traits, typename _Alloc,
00351        template <typename, typename, typename> class _Base>
00352     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00353     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00354     find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
00355     {
00356       __glibcxx_requires_string_len(__s, __n);
00357       for (; __n && __pos < this->size(); ++__pos)
00358     {
00359       const _CharT* __p = traits_type::find(__s, __n,
00360                         this->_M_data()[__pos]);
00361       if (__p)
00362         return __pos;
00363     }
00364       return npos;
00365     }
00366 
00367   template<typename _CharT, typename _Traits, typename _Alloc,
00368        template <typename, typename, typename> class _Base>
00369     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00370     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00371     find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
00372     {
00373       __glibcxx_requires_string_len(__s, __n);
00374       size_type __size = this->size();
00375       if (__size && __n)
00376     {
00377       if (--__size > __pos)
00378         __size = __pos;
00379       do
00380         {
00381           if (traits_type::find(__s, __n, this->_M_data()[__size]))
00382         return __size;
00383         }
00384       while (__size-- != 0);
00385     }
00386       return npos;
00387     }
00388 
00389   template<typename _CharT, typename _Traits, typename _Alloc,
00390        template <typename, typename, typename> class _Base>
00391     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00392     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00393     find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
00394     {
00395       __glibcxx_requires_string_len(__s, __n);
00396       for (; __pos < this->size(); ++__pos)
00397     if (!traits_type::find(__s, __n, this->_M_data()[__pos]))
00398       return __pos;
00399       return npos;
00400     }
00401 
00402   template<typename _CharT, typename _Traits, typename _Alloc,
00403        template <typename, typename, typename> class _Base>
00404     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00405     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00406     find_first_not_of(_CharT __c, size_type __pos) const
00407     {
00408       for (; __pos < this->size(); ++__pos)
00409     if (!traits_type::eq(this->_M_data()[__pos], __c))
00410       return __pos;
00411       return npos;
00412     }
00413 
00414   template<typename _CharT, typename _Traits, typename _Alloc,
00415        template <typename, typename, typename> class _Base>
00416     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00417     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00418     find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
00419     {
00420       __glibcxx_requires_string_len(__s, __n);
00421       size_type __size = this->size();
00422       if (__size)
00423     {
00424       if (--__size > __pos)
00425         __size = __pos;
00426       do
00427         {
00428           if (!traits_type::find(__s, __n, this->_M_data()[__size]))
00429         return __size;
00430         }
00431       while (__size--);
00432     }
00433       return npos;
00434     }
00435 
00436   template<typename _CharT, typename _Traits, typename _Alloc,
00437        template <typename, typename, typename> class _Base>
00438     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00439     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00440     find_last_not_of(_CharT __c, size_type __pos) const
00441     {
00442       size_type __size = this->size();
00443       if (__size)
00444     {
00445       if (--__size > __pos)
00446         __size = __pos;
00447       do
00448         {
00449           if (!traits_type::eq(this->_M_data()[__size], __c))
00450         return __size;
00451         }
00452       while (__size--);
00453     }
00454       return npos;
00455     }
00456 
00457   template<typename _CharT, typename _Traits, typename _Alloc,
00458        template <typename, typename, typename> class _Base>
00459     int
00460     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00461     compare(size_type __pos, size_type __n, const __versa_string& __str) const
00462     {
00463       _M_check(__pos, "__versa_string::compare");
00464       __n = _M_limit(__pos, __n);
00465       const size_type __osize = __str.size();
00466       const size_type __len = std::min(__n, __osize);
00467       int __r = traits_type::compare(this->_M_data() + __pos,
00468                      __str.data(), __len);
00469       if (!__r)
00470     __r = __n - __osize;
00471       return __r;
00472     }
00473 
00474   template<typename _CharT, typename _Traits, typename _Alloc,
00475        template <typename, typename, typename> class _Base>
00476     int
00477     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00478     compare(size_type __pos1, size_type __n1, const __versa_string& __str,
00479         size_type __pos2, size_type __n2) const
00480     {
00481       _M_check(__pos1, "__versa_string::compare");
00482       __str._M_check(__pos2, "__versa_string::compare");
00483       __n1 = _M_limit(__pos1, __n1);
00484       __n2 = __str._M_limit(__pos2, __n2);
00485       const size_type __len = std::min(__n1, __n2);
00486       int __r = traits_type::compare(this->_M_data() + __pos1,
00487                      __str.data() + __pos2, __len);
00488       if (!__r)
00489     __r = __n1 - __n2;
00490       return __r;
00491     }
00492 
00493   template<typename _CharT, typename _Traits, typename _Alloc,
00494        template <typename, typename, typename> class _Base>
00495     int
00496     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00497     compare(const _CharT* __s) const
00498     {
00499       __glibcxx_requires_string(__s);
00500       const size_type __size = this->size();
00501       const size_type __osize = traits_type::length(__s);
00502       const size_type __len = std::min(__size, __osize);
00503       int __r = traits_type::compare(this->_M_data(), __s, __len);
00504       if (!__r)
00505     __r = __size - __osize;
00506       return __r;
00507     }
00508 
00509   template<typename _CharT, typename _Traits, typename _Alloc,
00510        template <typename, typename, typename> class _Base>
00511     int
00512     __versa_string <_CharT, _Traits, _Alloc, _Base>::
00513     compare(size_type __pos, size_type __n1, const _CharT* __s) const
00514     {
00515       __glibcxx_requires_string(__s);
00516       _M_check(__pos, "__versa_string::compare");
00517       __n1 = _M_limit(__pos, __n1);
00518       const size_type __osize = traits_type::length(__s);
00519       const size_type __len = std::min(__n1, __osize);
00520       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
00521       if (!__r)
00522     __r = __n1 - __osize;
00523       return __r;
00524     }
00525 
00526   template<typename _CharT, typename _Traits, typename _Alloc,
00527        template <typename, typename, typename> class _Base>
00528     int
00529     __versa_string <_CharT, _Traits, _Alloc, _Base>::
00530     compare(size_type __pos, size_type __n1, const _CharT* __s,
00531         size_type __n2) const
00532     {
00533       __glibcxx_requires_string_len(__s, __n2);
00534       _M_check(__pos, "__versa_string::compare");
00535       __n1 = _M_limit(__pos, __n1);
00536       const size_type __len = std::min(__n1, __n2);
00537       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
00538       if (!__r)
00539     __r = __n1 - __n2;
00540       return __r;
00541     }
00542 
00543 _GLIBCXX_END_NAMESPACE
00544 
00545 _GLIBCXX_BEGIN_NAMESPACE(std)
00546 
00547   template<typename _CharT, typename _Traits, typename _Alloc,
00548            template <typename, typename, typename> class _Base>
00549     basic_istream<_CharT, _Traits>&
00550     operator>>(basic_istream<_CharT, _Traits>& __in,
00551            __gnu_cxx::__versa_string<_CharT, _Traits,
00552                                      _Alloc, _Base>& __str)
00553     {
00554       typedef basic_istream<_CharT, _Traits>            __istream_type;
00555       typedef typename __istream_type::int_type     __int_type;
00556       typedef typename __istream_type::__streambuf_type __streambuf_type;
00557       typedef typename __istream_type::__ctype_type __ctype_type;
00558       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
00559                                                     __string_type;
00560       typedef typename __string_type::size_type     __size_type;
00561 
00562       __size_type __extracted = 0;
00563       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
00564       typename __istream_type::sentry __cerb(__in, false);
00565       if (__cerb)
00566     {
00567       try
00568         {
00569           // Avoid reallocation for common case.
00570           __str.erase();
00571           _CharT __buf[128];
00572           __size_type __len = 0;
00573           const streamsize __w = __in.width();
00574           const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
00575                                       : __str.max_size();
00576           const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
00577           const __int_type __eof = _Traits::eof();
00578           __streambuf_type* __sb = __in.rdbuf();
00579           __int_type __c = __sb->sgetc();
00580 
00581           while (__extracted < __n
00582              && !_Traits::eq_int_type(__c, __eof)
00583              && !__ct.is(ctype_base::space, _Traits::to_char_type(__c)))
00584         {
00585           if (__len == sizeof(__buf) / sizeof(_CharT))
00586             {
00587               __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
00588               __len = 0;
00589             }
00590           __buf[__len++] = _Traits::to_char_type(__c);
00591           ++__extracted;
00592           __c = __sb->snextc();
00593         }
00594           __str.append(__buf, __len);
00595 
00596           if (_Traits::eq_int_type(__c, __eof))
00597         __err |= ios_base::eofbit;
00598           __in.width(0);
00599         }
00600       catch(...)
00601         {
00602           // _GLIBCXX_RESOLVE_LIB_DEFECTS
00603           // 91. Description of operator>> and getline() for string<>
00604           // might cause endless loop
00605           __in._M_setstate(ios_base::badbit);
00606         }
00607     }
00608       // 211.  operator>>(istream&, string&) doesn't set failbit
00609       if (!__extracted)
00610     __err |= ios_base::failbit;
00611       if (__err)
00612     __in.setstate(__err);
00613       return __in;
00614     }      
00615 
00616   template<typename _CharT, typename _Traits, typename _Alloc,
00617            template <typename, typename, typename> class _Base>
00618     basic_istream<_CharT, _Traits>&
00619     getline(basic_istream<_CharT, _Traits>& __in,
00620         __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str,
00621         _CharT __delim)
00622     {
00623       typedef basic_istream<_CharT, _Traits>            __istream_type;
00624       typedef typename __istream_type::int_type     __int_type;
00625       typedef typename __istream_type::__streambuf_type __streambuf_type;
00626       typedef typename __istream_type::__ctype_type __ctype_type;
00627       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
00628                                                     __string_type;
00629       typedef typename __string_type::size_type     __size_type;
00630 
00631       __size_type __extracted = 0;
00632       const __size_type __n = __str.max_size();
00633       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
00634       typename __istream_type::sentry __cerb(__in, true);
00635       if (__cerb)
00636     {
00637       try
00638         {
00639           // Avoid reallocation for common case.
00640           __str.erase();
00641           _CharT __buf[128];
00642           __size_type __len = 0;
00643           const __int_type __idelim = _Traits::to_int_type(__delim);
00644           const __int_type __eof = _Traits::eof();
00645           __streambuf_type* __sb = __in.rdbuf();
00646           __int_type __c = __sb->sgetc();
00647 
00648           while (__extracted < __n
00649              && !_Traits::eq_int_type(__c, __eof)
00650              && !_Traits::eq_int_type(__c, __idelim))
00651         {
00652           if (__len == sizeof(__buf) / sizeof(_CharT))
00653             {
00654               __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
00655               __len = 0;
00656             }
00657           __buf[__len++] = _Traits::to_char_type(__c);
00658           ++__extracted;
00659           __c = __sb->snextc();
00660         }
00661           __str.append(__buf, __len);
00662 
00663           if (_Traits::eq_int_type(__c, __eof))
00664         __err |= ios_base::eofbit;
00665           else if (_Traits::eq_int_type(__c, __idelim))
00666         {
00667           ++__extracted;          
00668           __sb->sbumpc();
00669         }
00670           else
00671         __err |= ios_base::failbit;
00672         }
00673       catch(...)
00674         {
00675           // _GLIBCXX_RESOLVE_LIB_DEFECTS
00676           // 91. Description of operator>> and getline() for string<>
00677           // might cause endless loop
00678           __in._M_setstate(ios_base::badbit);
00679         }
00680     }
00681       if (!__extracted)
00682     __err |= ios_base::failbit;
00683       if (__err)
00684     __in.setstate(__err);
00685       return __in;
00686     }      
00687   
00688 _GLIBCXX_END_NAMESPACE
00689 
00690 #endif // _VSTRING_TCC

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