libstdc++
vstring.tcc
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00001 // Versatile string -*- C++ -*-
00002 
00003 // Copyright (C) 2005-2013 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 /** @file ext/vstring.tcc
00026  *  This is an internal header file, included by other library headers.
00027  *  Do not attempt to use it directly. @headername{ext/vstring.h}
00028  */
00029 
00030 #ifndef _VSTRING_TCC
00031 #define _VSTRING_TCC 1
00032 
00033 #pragma GCC system_header
00034 
00035 #include <bits/cxxabi_forced.h>
00036 
00037 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
00038 {
00039 _GLIBCXX_BEGIN_NAMESPACE_VERSION
00040 
00041   template<typename _CharT, typename _Traits, typename _Alloc,
00042        template <typename, typename, typename> class _Base>
00043     const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00044     __versa_string<_CharT, _Traits, _Alloc, _Base>::npos;
00045 
00046   template<typename _CharT, typename _Traits, typename _Alloc,
00047        template <typename, typename, typename> class _Base>
00048     void
00049     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00050     resize(size_type __n, _CharT __c)
00051     {
00052       const size_type __size = this->size();
00053       if (__size < __n)
00054     this->append(__n - __size, __c);
00055       else if (__n < __size)
00056     this->_M_erase(__n, __size - __n);
00057     }
00058 
00059   template<typename _CharT, typename _Traits, typename _Alloc,
00060        template <typename, typename, typename> class _Base>
00061     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00062     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00063     _M_append(const _CharT* __s, size_type __n)
00064     {
00065       const size_type __len = __n + this->size();
00066 
00067       if (__len <= this->capacity() && !this->_M_is_shared())
00068     {
00069       if (__n)
00070         this->_S_copy(this->_M_data() + this->size(), __s, __n);
00071     }
00072       else
00073     this->_M_mutate(this->size(), size_type(0), __s, __n);
00074 
00075       this->_M_set_length(__len);
00076       return *this;
00077     }
00078 
00079   template<typename _CharT, typename _Traits, typename _Alloc,
00080        template <typename, typename, typename> class _Base>
00081     template<typename _InputIterator>
00082       __versa_string<_CharT, _Traits, _Alloc, _Base>&
00083       __versa_string<_CharT, _Traits, _Alloc, _Base>::
00084       _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
00085               _InputIterator __k2, std::__false_type)
00086       {
00087     const __versa_string __s(__k1, __k2);
00088     const size_type __n1 = __i2 - __i1;
00089     return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(),
00090               __s.size());
00091       }
00092 
00093   template<typename _CharT, typename _Traits, typename _Alloc,
00094        template <typename, typename, typename> class _Base>
00095     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00096     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00097     _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
00098            _CharT __c)
00099     {
00100       _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux");
00101 
00102       const size_type __old_size = this->size();
00103       const size_type __new_size = __old_size + __n2 - __n1;
00104 
00105       if (__new_size <= this->capacity() && !this->_M_is_shared())
00106     {
00107       _CharT* __p = this->_M_data() + __pos1;
00108 
00109       const size_type __how_much = __old_size - __pos1 - __n1;
00110       if (__how_much && __n1 != __n2)
00111         this->_S_move(__p + __n2, __p + __n1, __how_much);
00112     }
00113       else
00114     this->_M_mutate(__pos1, __n1, 0, __n2);
00115 
00116       if (__n2)
00117     this->_S_assign(this->_M_data() + __pos1, __n2, __c);
00118 
00119       this->_M_set_length(__new_size);
00120       return *this;
00121     }
00122 
00123   template<typename _CharT, typename _Traits, typename _Alloc,
00124        template <typename, typename, typename> class _Base>
00125     __versa_string<_CharT, _Traits, _Alloc, _Base>&
00126     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00127     _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
00128            const size_type __len2)
00129     {
00130       _M_check_length(__len1, __len2, "__versa_string::_M_replace");
00131 
00132       const size_type __old_size = this->size();
00133       const size_type __new_size = __old_size + __len2 - __len1;
00134       
00135       if (__new_size <= this->capacity() && !this->_M_is_shared())
00136     {
00137       _CharT* __p = this->_M_data() + __pos;
00138 
00139       const size_type __how_much = __old_size - __pos - __len1;
00140       if (_M_disjunct(__s))
00141         {
00142           if (__how_much && __len1 != __len2)
00143         this->_S_move(__p + __len2, __p + __len1, __how_much);
00144           if (__len2)
00145         this->_S_copy(__p, __s, __len2);
00146         }
00147       else
00148         {
00149           // Work in-place.
00150           if (__len2 && __len2 <= __len1)
00151         this->_S_move(__p, __s, __len2);
00152           if (__how_much && __len1 != __len2)
00153         this->_S_move(__p + __len2, __p + __len1, __how_much);
00154           if (__len2 > __len1)
00155         {
00156           if (__s + __len2 <= __p + __len1)
00157             this->_S_move(__p, __s, __len2);
00158           else if (__s >= __p + __len1)
00159             this->_S_copy(__p, __s + __len2 - __len1, __len2);
00160           else
00161             {
00162               const size_type __nleft = (__p + __len1) - __s;
00163               this->_S_move(__p, __s, __nleft);
00164               this->_S_copy(__p + __nleft, __p + __len2,
00165                     __len2 - __nleft);
00166             }
00167         }
00168         }
00169     }
00170       else
00171     this->_M_mutate(__pos, __len1, __s, __len2);
00172 
00173       this->_M_set_length(__new_size);
00174       return *this;
00175     }
00176   
00177   template<typename _CharT, typename _Traits, typename _Alloc,
00178        template <typename, typename, typename> class _Base>
00179     __versa_string<_CharT, _Traits, _Alloc, _Base>
00180     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00181           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00182     {
00183       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00184       __str.reserve(__lhs.size() + __rhs.size());
00185       __str.append(__lhs);
00186       __str.append(__rhs);
00187       return __str;
00188     }
00189 
00190   template<typename _CharT, typename _Traits, typename _Alloc,
00191        template <typename, typename, typename> class _Base>
00192     __versa_string<_CharT, _Traits, _Alloc, _Base>
00193     operator+(const _CharT* __lhs,
00194           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00195     {
00196       __glibcxx_requires_string(__lhs);
00197       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
00198       typedef typename __string_type::size_type   __size_type;
00199       const __size_type __len = _Traits::length(__lhs);
00200       __string_type __str;
00201       __str.reserve(__len + __rhs.size());
00202       __str.append(__lhs, __len);
00203       __str.append(__rhs);
00204       return __str;
00205     }
00206 
00207   template<typename _CharT, typename _Traits, typename _Alloc,
00208        template <typename, typename, typename> class _Base>
00209     __versa_string<_CharT, _Traits, _Alloc, _Base>
00210     operator+(_CharT __lhs,
00211           const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
00212     {
00213       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00214       __str.reserve(__rhs.size() + 1);
00215       __str.push_back(__lhs);
00216       __str.append(__rhs);
00217       return __str;
00218     }
00219 
00220   template<typename _CharT, typename _Traits, typename _Alloc,
00221        template <typename, typename, typename> class _Base>
00222     __versa_string<_CharT, _Traits, _Alloc, _Base>
00223     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00224           const _CharT* __rhs)
00225     {
00226       __glibcxx_requires_string(__rhs);
00227       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
00228       typedef typename __string_type::size_type   __size_type;
00229       const __size_type __len = _Traits::length(__rhs);
00230       __string_type __str;
00231       __str.reserve(__lhs.size() + __len);
00232       __str.append(__lhs);
00233       __str.append(__rhs, __len);
00234       return __str;
00235     }
00236 
00237   template<typename _CharT, typename _Traits, typename _Alloc,
00238        template <typename, typename, typename> class _Base>
00239     __versa_string<_CharT, _Traits, _Alloc, _Base>
00240     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
00241           _CharT __rhs)
00242     {
00243       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
00244       __str.reserve(__lhs.size() + 1);
00245       __str.append(__lhs);
00246       __str.push_back(__rhs);
00247       return __str;
00248     }
00249 
00250   template<typename _CharT, typename _Traits, typename _Alloc,
00251        template <typename, typename, typename> class _Base>
00252     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00253     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00254     copy(_CharT* __s, size_type __n, size_type __pos) const
00255     {
00256       _M_check(__pos, "__versa_string::copy");
00257       __n = _M_limit(__pos, __n);
00258       __glibcxx_requires_string_len(__s, __n);
00259       if (__n)
00260     this->_S_copy(__s, this->_M_data() + __pos, __n);
00261       // 21.3.5.7 par 3: do not append null.  (good.)
00262       return __n;
00263     }
00264 
00265   template<typename _CharT, typename _Traits, typename _Alloc,
00266        template <typename, typename, typename> class _Base>
00267     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00268     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00269     find(const _CharT* __s, size_type __pos, size_type __n) const
00270     {
00271       __glibcxx_requires_string_len(__s, __n);
00272       const size_type __size = this->size();
00273       const _CharT* __data = this->_M_data();
00274 
00275       if (__n == 0)
00276     return __pos <= __size ? __pos : npos;
00277 
00278       if (__n <= __size)
00279     {
00280       for (; __pos <= __size - __n; ++__pos)
00281         if (traits_type::eq(__data[__pos], __s[0])
00282         && traits_type::compare(__data + __pos + 1,
00283                     __s + 1, __n - 1) == 0)
00284           return __pos;
00285     }
00286       return npos;
00287     }
00288 
00289   template<typename _CharT, typename _Traits, typename _Alloc,
00290        template <typename, typename, typename> class _Base>
00291     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00292     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00293     find(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
00294     {
00295       size_type __ret = npos;
00296       const size_type __size = this->size();
00297       if (__pos < __size)
00298     {
00299       const _CharT* __data = this->_M_data();
00300       const size_type __n = __size - __pos;
00301       const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
00302       if (__p)
00303         __ret = __p - __data;
00304     }
00305       return __ret;
00306     }
00307 
00308   template<typename _CharT, typename _Traits, typename _Alloc,
00309        template <typename, typename, typename> class _Base>
00310     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00311     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00312     rfind(const _CharT* __s, size_type __pos, size_type __n) const
00313     {
00314       __glibcxx_requires_string_len(__s, __n);
00315       const size_type __size = this->size();
00316       if (__n <= __size)
00317     {
00318       __pos = std::min(size_type(__size - __n), __pos);
00319       const _CharT* __data = this->_M_data();
00320       do
00321         {
00322           if (traits_type::compare(__data + __pos, __s, __n) == 0)
00323         return __pos;
00324         }
00325       while (__pos-- > 0);
00326     }
00327       return npos;
00328     }
00329 
00330   template<typename _CharT, typename _Traits, typename _Alloc,
00331        template <typename, typename, typename> class _Base>
00332     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00333     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00334     rfind(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
00335     {
00336       size_type __size = this->size();
00337       if (__size)
00338     {
00339       if (--__size > __pos)
00340         __size = __pos;
00341       for (++__size; __size-- > 0; )
00342         if (traits_type::eq(this->_M_data()[__size], __c))
00343           return __size;
00344     }
00345       return npos;
00346     }
00347 
00348   template<typename _CharT, typename _Traits, typename _Alloc,
00349        template <typename, typename, typename> class _Base>
00350     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00351     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00352     find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
00353     {
00354       __glibcxx_requires_string_len(__s, __n);
00355       for (; __n && __pos < this->size(); ++__pos)
00356     {
00357       const _CharT* __p = traits_type::find(__s, __n,
00358                         this->_M_data()[__pos]);
00359       if (__p)
00360         return __pos;
00361     }
00362       return npos;
00363     }
00364 
00365   template<typename _CharT, typename _Traits, typename _Alloc,
00366        template <typename, typename, typename> class _Base>
00367     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00368     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00369     find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
00370     {
00371       __glibcxx_requires_string_len(__s, __n);
00372       size_type __size = this->size();
00373       if (__size && __n)
00374     {
00375       if (--__size > __pos)
00376         __size = __pos;
00377       do
00378         {
00379           if (traits_type::find(__s, __n, this->_M_data()[__size]))
00380         return __size;
00381         }
00382       while (__size-- != 0);
00383     }
00384       return npos;
00385     }
00386 
00387   template<typename _CharT, typename _Traits, typename _Alloc,
00388        template <typename, typename, typename> class _Base>
00389     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00390     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00391     find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
00392     {
00393       __glibcxx_requires_string_len(__s, __n);
00394       for (; __pos < this->size(); ++__pos)
00395     if (!traits_type::find(__s, __n, this->_M_data()[__pos]))
00396       return __pos;
00397       return npos;
00398     }
00399 
00400   template<typename _CharT, typename _Traits, typename _Alloc,
00401        template <typename, typename, typename> class _Base>
00402     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00403     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00404     find_first_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
00405     {
00406       for (; __pos < this->size(); ++__pos)
00407     if (!traits_type::eq(this->_M_data()[__pos], __c))
00408       return __pos;
00409       return npos;
00410     }
00411 
00412   template<typename _CharT, typename _Traits, typename _Alloc,
00413        template <typename, typename, typename> class _Base>
00414     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00415     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00416     find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
00417     {
00418       __glibcxx_requires_string_len(__s, __n);
00419       size_type __size = this->size();
00420       if (__size)
00421     {
00422       if (--__size > __pos)
00423         __size = __pos;
00424       do
00425         {
00426           if (!traits_type::find(__s, __n, this->_M_data()[__size]))
00427         return __size;
00428         }
00429       while (__size--);
00430     }
00431       return npos;
00432     }
00433 
00434   template<typename _CharT, typename _Traits, typename _Alloc,
00435        template <typename, typename, typename> class _Base>
00436     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
00437     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00438     find_last_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
00439     {
00440       size_type __size = this->size();
00441       if (__size)
00442     {
00443       if (--__size > __pos)
00444         __size = __pos;
00445       do
00446         {
00447           if (!traits_type::eq(this->_M_data()[__size], __c))
00448         return __size;
00449         }
00450       while (__size--);
00451     }
00452       return npos;
00453     }
00454 
00455   template<typename _CharT, typename _Traits, typename _Alloc,
00456        template <typename, typename, typename> class _Base>
00457     int
00458     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00459     compare(size_type __pos, size_type __n, const __versa_string& __str) const
00460     {
00461       _M_check(__pos, "__versa_string::compare");
00462       __n = _M_limit(__pos, __n);
00463       const size_type __osize = __str.size();
00464       const size_type __len = std::min(__n, __osize);
00465       int __r = traits_type::compare(this->_M_data() + __pos,
00466                      __str.data(), __len);
00467       if (!__r)
00468     __r = this->_S_compare(__n, __osize);
00469       return __r;
00470     }
00471 
00472   template<typename _CharT, typename _Traits, typename _Alloc,
00473        template <typename, typename, typename> class _Base>
00474     int
00475     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00476     compare(size_type __pos1, size_type __n1, const __versa_string& __str,
00477         size_type __pos2, size_type __n2) const
00478     {
00479       _M_check(__pos1, "__versa_string::compare");
00480       __str._M_check(__pos2, "__versa_string::compare");
00481       __n1 = _M_limit(__pos1, __n1);
00482       __n2 = __str._M_limit(__pos2, __n2);
00483       const size_type __len = std::min(__n1, __n2);
00484       int __r = traits_type::compare(this->_M_data() + __pos1,
00485                      __str.data() + __pos2, __len);
00486       if (!__r)
00487     __r = this->_S_compare(__n1, __n2);
00488       return __r;
00489     }
00490 
00491   template<typename _CharT, typename _Traits, typename _Alloc,
00492        template <typename, typename, typename> class _Base>
00493     int
00494     __versa_string<_CharT, _Traits, _Alloc, _Base>::
00495     compare(const _CharT* __s) const
00496     {
00497       __glibcxx_requires_string(__s);
00498       const size_type __size = this->size();
00499       const size_type __osize = traits_type::length(__s);
00500       const size_type __len = std::min(__size, __osize);
00501       int __r = traits_type::compare(this->_M_data(), __s, __len);
00502       if (!__r)
00503     __r = this->_S_compare(__size, __osize);
00504       return __r;
00505     }
00506 
00507   template<typename _CharT, typename _Traits, typename _Alloc,
00508        template <typename, typename, typename> class _Base>
00509     int
00510     __versa_string <_CharT, _Traits, _Alloc, _Base>::
00511     compare(size_type __pos, size_type __n1, const _CharT* __s) const
00512     {
00513       __glibcxx_requires_string(__s);
00514       _M_check(__pos, "__versa_string::compare");
00515       __n1 = _M_limit(__pos, __n1);
00516       const size_type __osize = traits_type::length(__s);
00517       const size_type __len = std::min(__n1, __osize);
00518       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
00519       if (!__r)
00520     __r = this->_S_compare(__n1, __osize);
00521       return __r;
00522     }
00523 
00524   template<typename _CharT, typename _Traits, typename _Alloc,
00525        template <typename, typename, typename> class _Base>
00526     int
00527     __versa_string <_CharT, _Traits, _Alloc, _Base>::
00528     compare(size_type __pos, size_type __n1, const _CharT* __s,
00529         size_type __n2) const
00530     {
00531       __glibcxx_requires_string_len(__s, __n2);
00532       _M_check(__pos, "__versa_string::compare");
00533       __n1 = _M_limit(__pos, __n1);
00534       const size_type __len = std::min(__n1, __n2);
00535       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
00536       if (!__r)
00537     __r = this->_S_compare(__n1, __n2);
00538       return __r;
00539     }
00540 
00541 _GLIBCXX_END_NAMESPACE_VERSION
00542 } // namespace
00543 
00544 namespace std _GLIBCXX_VISIBILITY(default)
00545 {
00546 _GLIBCXX_BEGIN_NAMESPACE_VERSION
00547 
00548   template<typename _CharT, typename _Traits, typename _Alloc,
00549            template <typename, typename, typename> class _Base>
00550     basic_istream<_CharT, _Traits>&
00551     operator>>(basic_istream<_CharT, _Traits>& __in,
00552            __gnu_cxx::__versa_string<_CharT, _Traits,
00553                                      _Alloc, _Base>& __str)
00554     {
00555       typedef basic_istream<_CharT, _Traits>            __istream_type;
00556       typedef typename __istream_type::ios_base         __ios_base;
00557       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
00558                                                     __string_type;
00559       typedef typename __istream_type::int_type     __int_type;
00560       typedef typename __string_type::size_type     __size_type;
00561       typedef ctype<_CharT>             __ctype_type;
00562       typedef typename __ctype_type::ctype_base         __ctype_base;
00563 
00564       __size_type __extracted = 0;
00565       typename __ios_base::iostate __err = __ios_base::goodbit;
00566       typename __istream_type::sentry __cerb(__in, false);
00567       if (__cerb)
00568     {
00569       __try
00570         {
00571           // Avoid reallocation for common case.
00572           __str.erase();
00573           _CharT __buf[128];
00574           __size_type __len = 0;
00575           const streamsize __w = __in.width();
00576           const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
00577                                       : __str.max_size();
00578           const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
00579           const __int_type __eof = _Traits::eof();
00580           __int_type __c = __in.rdbuf()->sgetc();
00581 
00582           while (__extracted < __n
00583              && !_Traits::eq_int_type(__c, __eof)
00584              && !__ct.is(__ctype_base::space,
00585                  _Traits::to_char_type(__c)))
00586         {
00587           if (__len == sizeof(__buf) / sizeof(_CharT))
00588             {
00589               __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
00590               __len = 0;
00591             }
00592           __buf[__len++] = _Traits::to_char_type(__c);
00593           ++__extracted;
00594           __c = __in.rdbuf()->snextc();
00595         }
00596           __str.append(__buf, __len);
00597 
00598           if (_Traits::eq_int_type(__c, __eof))
00599         __err |= __ios_base::eofbit;
00600           __in.width(0);
00601         }
00602       __catch(__cxxabiv1::__forced_unwind&)
00603         {
00604           __in._M_setstate(__ios_base::badbit);
00605           __throw_exception_again;
00606         }
00607       __catch(...)
00608         {
00609           // _GLIBCXX_RESOLVE_LIB_DEFECTS
00610           // 91. Description of operator>> and getline() for string<>
00611           // might cause endless loop
00612           __in._M_setstate(__ios_base::badbit);
00613         }
00614     }
00615       // 211.  operator>>(istream&, string&) doesn't set failbit
00616       if (!__extracted)
00617     __err |= __ios_base::failbit;
00618       if (__err)
00619     __in.setstate(__err);
00620       return __in;
00621     }      
00622 
00623   template<typename _CharT, typename _Traits, typename _Alloc,
00624            template <typename, typename, typename> class _Base>
00625     basic_istream<_CharT, _Traits>&
00626     getline(basic_istream<_CharT, _Traits>& __in,
00627         __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str,
00628         _CharT __delim)
00629     {
00630       typedef basic_istream<_CharT, _Traits>            __istream_type;
00631       typedef typename __istream_type::ios_base         __ios_base;
00632       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
00633                                                     __string_type;
00634       typedef typename __istream_type::int_type     __int_type;
00635       typedef typename __string_type::size_type     __size_type;
00636 
00637       __size_type __extracted = 0;
00638       const __size_type __n = __str.max_size();
00639       typename __ios_base::iostate __err = __ios_base::goodbit;
00640       typename __istream_type::sentry __cerb(__in, true);
00641       if (__cerb)
00642     {
00643       __try
00644         {
00645           // Avoid reallocation for common case.
00646           __str.erase();
00647           _CharT __buf[128];
00648           __size_type __len = 0;
00649           const __int_type __idelim = _Traits::to_int_type(__delim);
00650           const __int_type __eof = _Traits::eof();
00651           __int_type __c = __in.rdbuf()->sgetc();
00652 
00653           while (__extracted < __n
00654              && !_Traits::eq_int_type(__c, __eof)
00655              && !_Traits::eq_int_type(__c, __idelim))
00656         {
00657           if (__len == sizeof(__buf) / sizeof(_CharT))
00658             {
00659               __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
00660               __len = 0;
00661             }
00662           __buf[__len++] = _Traits::to_char_type(__c);
00663           ++__extracted;
00664           __c = __in.rdbuf()->snextc();
00665         }
00666           __str.append(__buf, __len);
00667 
00668           if (_Traits::eq_int_type(__c, __eof))
00669         __err |= __ios_base::eofbit;
00670           else if (_Traits::eq_int_type(__c, __idelim))
00671         {
00672           ++__extracted;          
00673           __in.rdbuf()->sbumpc();
00674         }
00675           else
00676         __err |= __ios_base::failbit;
00677         }
00678       __catch(__cxxabiv1::__forced_unwind&)
00679         {
00680           __in._M_setstate(__ios_base::badbit);
00681           __throw_exception_again;
00682         }
00683       __catch(...)
00684         {
00685           // _GLIBCXX_RESOLVE_LIB_DEFECTS
00686           // 91. Description of operator>> and getline() for string<>
00687           // might cause endless loop
00688           __in._M_setstate(__ios_base::badbit);
00689         }
00690     }
00691       if (!__extracted)
00692     __err |= __ios_base::failbit;
00693       if (__err)
00694     __in.setstate(__err);
00695       return __in;
00696     }      
00697 
00698 _GLIBCXX_END_NAMESPACE_VERSION
00699 } // namespace
00700 
00701 #endif // _VSTRING_TCC