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      1 // Versatile string -*- C++ -*-
      2 
      3 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
      4 //
      5 // This file is part of the GNU ISO C++ Library.  This library is free
      6 // software; you can redistribute it and/or modify it under the
      7 // terms of the GNU General Public License as published by the
      8 // Free Software Foundation; either version 3, or (at your option)
      9 // any later version.
     10 
     11 // This library is distributed in the hope that it will be useful,
     12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 // GNU General Public License for more details.
     15 
     16 // Under Section 7 of GPL version 3, you are granted additional
     17 // permissions described in the GCC Runtime Library Exception, version
     18 // 3.1, as published by the Free Software Foundation.
     19 
     20 // You should have received a copy of the GNU General Public License and
     21 // a copy of the GCC Runtime Library Exception along with this program;
     22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     23 // <http://www.gnu.org/licenses/>.
     24 
     25 /** @file ext/vstring.tcc
     26  *  This file is a GNU extension to the Standard C++ Library.
     27  *  This is an internal header file, included by other library headers.
     28  *  You should not attempt to use it directly.
     29  */
     30 
     31 #ifndef _VSTRING_TCC
     32 #define _VSTRING_TCC 1
     33 
     34 #pragma GCC system_header
     35 
     36 #include <cxxabi-forced.h>
     37 
     38 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
     39 
     40   template<typename _CharT, typename _Traits, typename _Alloc,
     41 	   template <typename, typename, typename> class _Base>
     42     const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
     43     __versa_string<_CharT, _Traits, _Alloc, _Base>::npos;
     44 
     45   template<typename _CharT, typename _Traits, typename _Alloc,
     46 	   template <typename, typename, typename> class _Base>
     47     void
     48     __versa_string<_CharT, _Traits, _Alloc, _Base>::
     49     resize(size_type __n, _CharT __c)
     50     {
     51       const size_type __size = this->size();
     52       if (__size < __n)
     53 	this->append(__n - __size, __c);
     54       else if (__n < __size)
     55 	this->_M_erase(__n, __size - __n);
     56     }
     57 
     58   template<typename _CharT, typename _Traits, typename _Alloc,
     59 	   template <typename, typename, typename> class _Base>
     60     __versa_string<_CharT, _Traits, _Alloc, _Base>&
     61     __versa_string<_CharT, _Traits, _Alloc, _Base>::
     62     _M_append(const _CharT* __s, size_type __n)
     63     {
     64       const size_type __len = __n + this->size();
     65 
     66       if (__len <= this->capacity() && !this->_M_is_shared())
     67 	{
     68 	  if (__n)
     69 	    this->_S_copy(this->_M_data() + this->size(), __s, __n);
     70 	}
     71       else
     72 	this->_M_mutate(this->size(), size_type(0), __s, __n);
     73 
     74       this->_M_set_length(__len);
     75       return *this;
     76     }
     77 
     78   template<typename _CharT, typename _Traits, typename _Alloc,
     79 	   template <typename, typename, typename> class _Base>
     80     template<typename _InputIterator>
     81       __versa_string<_CharT, _Traits, _Alloc, _Base>&
     82       __versa_string<_CharT, _Traits, _Alloc, _Base>::
     83       _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
     84 			  _InputIterator __k2, std::__false_type)
     85       {
     86 	const __versa_string __s(__k1, __k2);
     87 	const size_type __n1 = __i2 - __i1;
     88 	return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(),
     89 			  __s.size());
     90       }
     91 
     92   template<typename _CharT, typename _Traits, typename _Alloc,
     93 	   template <typename, typename, typename> class _Base>
     94     __versa_string<_CharT, _Traits, _Alloc, _Base>&
     95     __versa_string<_CharT, _Traits, _Alloc, _Base>::
     96     _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
     97 		   _CharT __c)
     98     {
     99       _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux");
    100 
    101       const size_type __old_size = this->size();
    102       const size_type __new_size = __old_size + __n2 - __n1;
    103 
    104       if (__new_size <= this->capacity() && !this->_M_is_shared())
    105 	{
    106 	  _CharT* __p = this->_M_data() + __pos1;
    107 
    108 	  const size_type __how_much = __old_size - __pos1 - __n1;
    109 	  if (__how_much && __n1 != __n2)
    110 	    this->_S_move(__p + __n2, __p + __n1, __how_much);
    111 	}
    112       else
    113 	this->_M_mutate(__pos1, __n1, 0, __n2);
    114 
    115       if (__n2)
    116 	this->_S_assign(this->_M_data() + __pos1, __n2, __c);
    117 
    118       this->_M_set_length(__new_size);
    119       return *this;
    120     }
    121 
    122   template<typename _CharT, typename _Traits, typename _Alloc,
    123 	   template <typename, typename, typename> class _Base>
    124     __versa_string<_CharT, _Traits, _Alloc, _Base>&
    125     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    126     _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
    127 	       const size_type __len2)
    128     {
    129       _M_check_length(__len1, __len2, "__versa_string::_M_replace");
    130 
    131       const size_type __old_size = this->size();
    132       const size_type __new_size = __old_size + __len2 - __len1;
    133       
    134       if (__new_size <= this->capacity() && !this->_M_is_shared())
    135 	{
    136 	  _CharT* __p = this->_M_data() + __pos;
    137 
    138 	  const size_type __how_much = __old_size - __pos - __len1;
    139 	  if (_M_disjunct(__s))
    140 	    {
    141 	      if (__how_much && __len1 != __len2)
    142 		this->_S_move(__p + __len2, __p + __len1, __how_much);
    143 	      if (__len2)
    144 		this->_S_copy(__p, __s, __len2);
    145 	    }
    146 	  else
    147 	    {
    148 	      // Work in-place.
    149 	      if (__len2 && __len2 <= __len1)
    150 		this->_S_move(__p, __s, __len2);
    151 	      if (__how_much && __len1 != __len2)
    152 		this->_S_move(__p + __len2, __p + __len1, __how_much);
    153 	      if (__len2 > __len1)
    154 		{
    155 		  if (__s + __len2 <= __p + __len1)
    156 		    this->_S_move(__p, __s, __len2);
    157 		  else if (__s >= __p + __len1)
    158 		    this->_S_copy(__p, __s + __len2 - __len1, __len2);
    159 		  else
    160 		    {
    161 		      const size_type __nleft = (__p + __len1) - __s;
    162 		      this->_S_move(__p, __s, __nleft);
    163 		      this->_S_copy(__p + __nleft, __p + __len2,
    164 				    __len2 - __nleft);
    165 		    }
    166 		}
    167 	    }
    168 	}
    169       else
    170 	this->_M_mutate(__pos, __len1, __s, __len2);
    171 
    172       this->_M_set_length(__new_size);
    173       return *this;
    174     }
    175   
    176   template<typename _CharT, typename _Traits, typename _Alloc,
    177 	   template <typename, typename, typename> class _Base>
    178     __versa_string<_CharT, _Traits, _Alloc, _Base>
    179     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
    180 	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    181     {
    182       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
    183       __str.reserve(__lhs.size() + __rhs.size());
    184       __str.append(__lhs);
    185       __str.append(__rhs);
    186       return __str;
    187     }
    188 
    189   template<typename _CharT, typename _Traits, typename _Alloc,
    190 	   template <typename, typename, typename> class _Base>
    191     __versa_string<_CharT, _Traits, _Alloc, _Base>
    192     operator+(const _CharT* __lhs,
    193 	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    194     {
    195       __glibcxx_requires_string(__lhs);
    196       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
    197       typedef typename __string_type::size_type	  __size_type;
    198       const __size_type __len = _Traits::length(__lhs);
    199       __string_type __str;
    200       __str.reserve(__len + __rhs.size());
    201       __str.append(__lhs, __len);
    202       __str.append(__rhs);
    203       return __str;
    204     }
    205 
    206   template<typename _CharT, typename _Traits, typename _Alloc,
    207 	   template <typename, typename, typename> class _Base>
    208     __versa_string<_CharT, _Traits, _Alloc, _Base>
    209     operator+(_CharT __lhs,
    210 	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    211     {
    212       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
    213       __str.reserve(__rhs.size() + 1);
    214       __str.push_back(__lhs);
    215       __str.append(__rhs);
    216       return __str;
    217     }
    218 
    219   template<typename _CharT, typename _Traits, typename _Alloc,
    220 	   template <typename, typename, typename> class _Base>
    221     __versa_string<_CharT, _Traits, _Alloc, _Base>
    222     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
    223 	      const _CharT* __rhs)
    224     {
    225       __glibcxx_requires_string(__rhs);
    226       typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
    227       typedef typename __string_type::size_type	  __size_type;
    228       const __size_type __len = _Traits::length(__rhs);
    229       __string_type __str;
    230       __str.reserve(__lhs.size() + __len);
    231       __str.append(__lhs);
    232       __str.append(__rhs, __len);
    233       return __str;
    234     }
    235 
    236   template<typename _CharT, typename _Traits, typename _Alloc,
    237 	   template <typename, typename, typename> class _Base>
    238     __versa_string<_CharT, _Traits, _Alloc, _Base>
    239     operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
    240 	      _CharT __rhs)
    241     {
    242       __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
    243       __str.reserve(__lhs.size() + 1);
    244       __str.append(__lhs);
    245       __str.push_back(__rhs);
    246       return __str;
    247     }
    248 
    249   template<typename _CharT, typename _Traits, typename _Alloc,
    250 	   template <typename, typename, typename> class _Base>
    251     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    252     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    253     copy(_CharT* __s, size_type __n, size_type __pos) const
    254     {
    255       _M_check(__pos, "__versa_string::copy");
    256       __n = _M_limit(__pos, __n);
    257       __glibcxx_requires_string_len(__s, __n);
    258       if (__n)
    259 	this->_S_copy(__s, this->_M_data() + __pos, __n);
    260       // 21.3.5.7 par 3: do not append null.  (good.)
    261       return __n;
    262     }
    263 
    264   template<typename _CharT, typename _Traits, typename _Alloc,
    265 	   template <typename, typename, typename> class _Base>
    266     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    267     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    268     find(const _CharT* __s, size_type __pos, size_type __n) const
    269     {
    270       __glibcxx_requires_string_len(__s, __n);
    271       const size_type __size = this->size();
    272       const _CharT* __data = this->_M_data();
    273 
    274       if (__n == 0)
    275 	return __pos <= __size ? __pos : npos;
    276 
    277       if (__n <= __size)
    278 	{
    279 	  for (; __pos <= __size - __n; ++__pos)
    280 	    if (traits_type::eq(__data[__pos], __s[0])
    281 		&& traits_type::compare(__data + __pos + 1,
    282 					__s + 1, __n - 1) == 0)
    283 	      return __pos;
    284 	}
    285       return npos;
    286     }
    287 
    288   template<typename _CharT, typename _Traits, typename _Alloc,
    289 	   template <typename, typename, typename> class _Base>
    290     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    291     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    292     find(_CharT __c, size_type __pos) const
    293     {
    294       size_type __ret = npos;
    295       const size_type __size = this->size();
    296       if (__pos < __size)
    297 	{
    298 	  const _CharT* __data = this->_M_data();
    299 	  const size_type __n = __size - __pos;
    300 	  const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
    301 	  if (__p)
    302 	    __ret = __p - __data;
    303 	}
    304       return __ret;
    305     }
    306 
    307   template<typename _CharT, typename _Traits, typename _Alloc,
    308 	   template <typename, typename, typename> class _Base>
    309     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    310     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    311     rfind(const _CharT* __s, size_type __pos, size_type __n) const
    312     {
    313       __glibcxx_requires_string_len(__s, __n);
    314       const size_type __size = this->size();
    315       if (__n <= __size)
    316 	{
    317 	  __pos = std::min(size_type(__size - __n), __pos);
    318 	  const _CharT* __data = this->_M_data();
    319 	  do
    320 	    {
    321 	      if (traits_type::compare(__data + __pos, __s, __n) == 0)
    322 		return __pos;
    323 	    }
    324 	  while (__pos-- > 0);
    325 	}
    326       return npos;
    327     }
    328 
    329   template<typename _CharT, typename _Traits, typename _Alloc,
    330 	   template <typename, typename, typename> class _Base>
    331     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    332     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    333     rfind(_CharT __c, size_type __pos) const
    334     {
    335       size_type __size = this->size();
    336       if (__size)
    337 	{
    338 	  if (--__size > __pos)
    339 	    __size = __pos;
    340 	  for (++__size; __size-- > 0; )
    341 	    if (traits_type::eq(this->_M_data()[__size], __c))
    342 	      return __size;
    343 	}
    344       return npos;
    345     }
    346 
    347   template<typename _CharT, typename _Traits, typename _Alloc,
    348 	   template <typename, typename, typename> class _Base>
    349     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    350     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    351     find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
    352     {
    353       __glibcxx_requires_string_len(__s, __n);
    354       for (; __n && __pos < this->size(); ++__pos)
    355 	{
    356 	  const _CharT* __p = traits_type::find(__s, __n,
    357 						this->_M_data()[__pos]);
    358 	  if (__p)
    359 	    return __pos;
    360 	}
    361       return npos;
    362     }
    363 
    364   template<typename _CharT, typename _Traits, typename _Alloc,
    365 	   template <typename, typename, typename> class _Base>
    366     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    367     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    368     find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
    369     {
    370       __glibcxx_requires_string_len(__s, __n);
    371       size_type __size = this->size();
    372       if (__size && __n)
    373 	{
    374 	  if (--__size > __pos)
    375 	    __size = __pos;
    376 	  do
    377 	    {
    378 	      if (traits_type::find(__s, __n, this->_M_data()[__size]))
    379 		return __size;
    380 	    }
    381 	  while (__size-- != 0);
    382 	}
    383       return npos;
    384     }
    385 
    386   template<typename _CharT, typename _Traits, typename _Alloc,
    387 	   template <typename, typename, typename> class _Base>
    388     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    389     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    390     find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
    391     {
    392       __glibcxx_requires_string_len(__s, __n);
    393       for (; __pos < this->size(); ++__pos)
    394 	if (!traits_type::find(__s, __n, this->_M_data()[__pos]))
    395 	  return __pos;
    396       return npos;
    397     }
    398 
    399   template<typename _CharT, typename _Traits, typename _Alloc,
    400 	   template <typename, typename, typename> class _Base>
    401     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    402     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    403     find_first_not_of(_CharT __c, size_type __pos) const
    404     {
    405       for (; __pos < this->size(); ++__pos)
    406 	if (!traits_type::eq(this->_M_data()[__pos], __c))
    407 	  return __pos;
    408       return npos;
    409     }
    410 
    411   template<typename _CharT, typename _Traits, typename _Alloc,
    412 	   template <typename, typename, typename> class _Base>
    413     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    414     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    415     find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
    416     {
    417       __glibcxx_requires_string_len(__s, __n);
    418       size_type __size = this->size();
    419       if (__size)
    420 	{
    421 	  if (--__size > __pos)
    422 	    __size = __pos;
    423 	  do
    424 	    {
    425 	      if (!traits_type::find(__s, __n, this->_M_data()[__size]))
    426 		return __size;
    427 	    }
    428 	  while (__size--);
    429 	}
    430       return npos;
    431     }
    432 
    433   template<typename _CharT, typename _Traits, typename _Alloc,
    434 	   template <typename, typename, typename> class _Base>
    435     typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    436     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    437     find_last_not_of(_CharT __c, size_type __pos) const
    438     {
    439       size_type __size = this->size();
    440       if (__size)
    441 	{
    442 	  if (--__size > __pos)
    443 	    __size = __pos;
    444 	  do
    445 	    {
    446 	      if (!traits_type::eq(this->_M_data()[__size], __c))
    447 		return __size;
    448 	    }
    449 	  while (__size--);
    450 	}
    451       return npos;
    452     }
    453 
    454   template<typename _CharT, typename _Traits, typename _Alloc,
    455 	   template <typename, typename, typename> class _Base>
    456     int
    457     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    458     compare(size_type __pos, size_type __n, const __versa_string& __str) const
    459     {
    460       _M_check(__pos, "__versa_string::compare");
    461       __n = _M_limit(__pos, __n);
    462       const size_type __osize = __str.size();
    463       const size_type __len = std::min(__n, __osize);
    464       int __r = traits_type::compare(this->_M_data() + __pos,
    465 				     __str.data(), __len);
    466       if (!__r)
    467 	__r = this->_S_compare(__n, __osize);
    468       return __r;
    469     }
    470 
    471   template<typename _CharT, typename _Traits, typename _Alloc,
    472 	   template <typename, typename, typename> class _Base>
    473     int
    474     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    475     compare(size_type __pos1, size_type __n1, const __versa_string& __str,
    476 	    size_type __pos2, size_type __n2) const
    477     {
    478       _M_check(__pos1, "__versa_string::compare");
    479       __str._M_check(__pos2, "__versa_string::compare");
    480       __n1 = _M_limit(__pos1, __n1);
    481       __n2 = __str._M_limit(__pos2, __n2);
    482       const size_type __len = std::min(__n1, __n2);
    483       int __r = traits_type::compare(this->_M_data() + __pos1,
    484 				     __str.data() + __pos2, __len);
    485       if (!__r)
    486 	__r = this->_S_compare(__n1, __n2);
    487       return __r;
    488     }
    489 
    490   template<typename _CharT, typename _Traits, typename _Alloc,
    491 	   template <typename, typename, typename> class _Base>
    492     int
    493     __versa_string<_CharT, _Traits, _Alloc, _Base>::
    494     compare(const _CharT* __s) const
    495     {
    496       __glibcxx_requires_string(__s);
    497       const size_type __size = this->size();
    498       const size_type __osize = traits_type::length(__s);
    499       const size_type __len = std::min(__size, __osize);
    500       int __r = traits_type::compare(this->_M_data(), __s, __len);
    501       if (!__r)
    502 	__r = this->_S_compare(__size, __osize);
    503       return __r;
    504     }
    505 
    506   template<typename _CharT, typename _Traits, typename _Alloc,
    507 	   template <typename, typename, typename> class _Base>
    508     int
    509     __versa_string <_CharT, _Traits, _Alloc, _Base>::
    510     compare(size_type __pos, size_type __n1, const _CharT* __s) const
    511     {
    512       __glibcxx_requires_string(__s);
    513       _M_check(__pos, "__versa_string::compare");
    514       __n1 = _M_limit(__pos, __n1);
    515       const size_type __osize = traits_type::length(__s);
    516       const size_type __len = std::min(__n1, __osize);
    517       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
    518       if (!__r)
    519 	__r = this->_S_compare(__n1, __osize);
    520       return __r;
    521     }
    522 
    523   template<typename _CharT, typename _Traits, typename _Alloc,
    524 	   template <typename, typename, typename> class _Base>
    525     int
    526     __versa_string <_CharT, _Traits, _Alloc, _Base>::
    527     compare(size_type __pos, size_type __n1, const _CharT* __s,
    528 	    size_type __n2) const
    529     {
    530       __glibcxx_requires_string_len(__s, __n2);
    531       _M_check(__pos, "__versa_string::compare");
    532       __n1 = _M_limit(__pos, __n1);
    533       const size_type __len = std::min(__n1, __n2);
    534       int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
    535       if (!__r)
    536 	__r = this->_S_compare(__n1, __n2);
    537       return __r;
    538     }
    539 
    540 _GLIBCXX_END_NAMESPACE
    541 
    542 _GLIBCXX_BEGIN_NAMESPACE(std)
    543 
    544   template<typename _CharT, typename _Traits, typename _Alloc,
    545            template <typename, typename, typename> class _Base>
    546     basic_istream<_CharT, _Traits>&
    547     operator>>(basic_istream<_CharT, _Traits>& __in,
    548 	       __gnu_cxx::__versa_string<_CharT, _Traits,
    549 	                                 _Alloc, _Base>& __str)
    550     {
    551       typedef basic_istream<_CharT, _Traits>            __istream_type;
    552       typedef typename __istream_type::ios_base         __ios_base;
    553       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
    554 	                                                __string_type;
    555       typedef typename __istream_type::int_type		__int_type;
    556       typedef typename __string_type::size_type		__size_type;
    557       typedef ctype<_CharT>				__ctype_type;
    558       typedef typename __ctype_type::ctype_base         __ctype_base;
    559 
    560       __size_type __extracted = 0;
    561       typename __ios_base::iostate __err = __ios_base::goodbit;
    562       typename __istream_type::sentry __cerb(__in, false);
    563       if (__cerb)
    564 	{
    565 	  __try
    566 	    {
    567 	      // Avoid reallocation for common case.
    568 	      __str.erase();
    569 	      _CharT __buf[128];
    570 	      __size_type __len = 0;
    571 	      const streamsize __w = __in.width();
    572 	      const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
    573 		                              : __str.max_size();
    574 	      const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
    575 	      const __int_type __eof = _Traits::eof();
    576 	      __int_type __c = __in.rdbuf()->sgetc();
    577 
    578 	      while (__extracted < __n
    579 		     && !_Traits::eq_int_type(__c, __eof)
    580 		     && !__ct.is(__ctype_base::space,
    581 				 _Traits::to_char_type(__c)))
    582 		{
    583 		  if (__len == sizeof(__buf) / sizeof(_CharT))
    584 		    {
    585 		      __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
    586 		      __len = 0;
    587 		    }
    588 		  __buf[__len++] = _Traits::to_char_type(__c);
    589 		  ++__extracted;
    590 		  __c = __in.rdbuf()->snextc();
    591 		}
    592 	      __str.append(__buf, __len);
    593 
    594 	      if (_Traits::eq_int_type(__c, __eof))
    595 		__err |= __ios_base::eofbit;
    596 	      __in.width(0);
    597 	    }
    598 	  __catch(__cxxabiv1::__forced_unwind&)
    599 	    {
    600 	      __in._M_setstate(__ios_base::badbit);
    601 	      __throw_exception_again;
    602 	    }
    603 	  __catch(...)
    604 	    {
    605 	      // _GLIBCXX_RESOLVE_LIB_DEFECTS
    606 	      // 91. Description of operator>> and getline() for string<>
    607 	      // might cause endless loop
    608 	      __in._M_setstate(__ios_base::badbit);
    609 	    }
    610 	}
    611       // 211.  operator>>(istream&, string&) doesn't set failbit
    612       if (!__extracted)
    613 	__err |= __ios_base::failbit;
    614       if (__err)
    615 	__in.setstate(__err);
    616       return __in;
    617     }      
    618 
    619   template<typename _CharT, typename _Traits, typename _Alloc,
    620            template <typename, typename, typename> class _Base>
    621     basic_istream<_CharT, _Traits>&
    622     getline(basic_istream<_CharT, _Traits>& __in,
    623 	    __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str,
    624 	    _CharT __delim)
    625     {
    626       typedef basic_istream<_CharT, _Traits>	        __istream_type;
    627       typedef typename __istream_type::ios_base         __ios_base;
    628       typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
    629 	                                                __string_type;
    630       typedef typename __istream_type::int_type		__int_type;
    631       typedef typename __string_type::size_type		__size_type;
    632 
    633       __size_type __extracted = 0;
    634       const __size_type __n = __str.max_size();
    635       typename __ios_base::iostate __err = __ios_base::goodbit;
    636       typename __istream_type::sentry __cerb(__in, true);
    637       if (__cerb)
    638 	{
    639 	  __try
    640 	    {
    641 	      // Avoid reallocation for common case.
    642 	      __str.erase();
    643 	      _CharT __buf[128];
    644 	      __size_type __len = 0;
    645 	      const __int_type __idelim = _Traits::to_int_type(__delim);
    646 	      const __int_type __eof = _Traits::eof();
    647 	      __int_type __c = __in.rdbuf()->sgetc();
    648 
    649 	      while (__extracted < __n
    650 		     && !_Traits::eq_int_type(__c, __eof)
    651 		     && !_Traits::eq_int_type(__c, __idelim))
    652 		{
    653 		  if (__len == sizeof(__buf) / sizeof(_CharT))
    654 		    {
    655 		      __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
    656 		      __len = 0;
    657 		    }
    658 		  __buf[__len++] = _Traits::to_char_type(__c);
    659 		  ++__extracted;
    660 		  __c = __in.rdbuf()->snextc();
    661 		}
    662 	      __str.append(__buf, __len);
    663 
    664 	      if (_Traits::eq_int_type(__c, __eof))
    665 		__err |= __ios_base::eofbit;
    666 	      else if (_Traits::eq_int_type(__c, __idelim))
    667 		{
    668 		  ++__extracted;		  
    669 		  __in.rdbuf()->sbumpc();
    670 		}
    671 	      else
    672 		__err |= __ios_base::failbit;
    673 	    }
    674 	  __catch(__cxxabiv1::__forced_unwind&)
    675 	    {
    676 	      __in._M_setstate(__ios_base::badbit);
    677 	      __throw_exception_again;
    678 	    }
    679 	  __catch(...)
    680 	    {
    681 	      // _GLIBCXX_RESOLVE_LIB_DEFECTS
    682 	      // 91. Description of operator>> and getline() for string<>
    683 	      // might cause endless loop
    684 	      __in._M_setstate(__ios_base::badbit);
    685 	    }
    686 	}
    687       if (!__extracted)
    688 	__err |= __ios_base::failbit;
    689       if (__err)
    690 	__in.setstate(__err);
    691       return __in;
    692     }      
    693 
    694 _GLIBCXX_END_NAMESPACE
    695 
    696 #endif // _VSTRING_TCC
    697