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- // Components for manipulating sequences of characters -*- C++ -*-
-
- // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
- // Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the
- // terms of the GNU General Public License as published by the
- // Free Software Foundation; either version 2, or (at your option)
- // any later version.
-
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
-
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING. If not, write to the Free
- // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- // USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- //
- // ISO C++ 14882: 21 Strings library
- //
-
- // This file is included by <string>. It is not meant to be included
- // separately.
-
- // Written by Jason Merrill based upon the specification by Takanori Adachi
- // in ANSI X3J16/94-0013R2. Rewritten by Nathan Myers to ISO-14882.
-
- #ifndef _CPP_BITS_STRING_TCC
- #define _CPP_BITS_STRING_TCC 1
-
- #pragma GCC system_header
-
- namespace std
- {
- template<typename _CharT, typename _Traits, typename _Alloc>
- const typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- _Rep::_S_max_size = (((npos - sizeof(_Rep))/sizeof(_CharT)) - 1) / 4;
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- const _CharT
- basic_string<_CharT, _Traits, _Alloc>::
- _Rep::_S_terminal = _CharT();
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- const typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::npos;
-
- // Linker sets _S_empty_rep_storage to all 0s (one reference, empty string)
- // at static init time (before static ctors are run).
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::_S_empty_rep_storage[
- (sizeof(_Rep) + sizeof(_CharT) + sizeof(size_type) - 1)/sizeof(size_type)];
-
- // NB: This is the special case for Input Iterators, used in
- // istreambuf_iterators, etc.
- // Input Iterators have a cost structure very different from
- // pointers, calling for a different coding style.
- template<typename _CharT, typename _Traits, typename _Alloc>
- template<typename _InIter>
- _CharT*
- basic_string<_CharT, _Traits, _Alloc>::
- _S_construct(_InIter __beg, _InIter __end, const _Alloc& __a,
- input_iterator_tag)
- {
- if (__beg == __end && __a == _Alloc())
- return _S_empty_rep()._M_refcopy();
- // Avoid reallocation for common case.
- _CharT __buf[100];
- size_type __i = 0;
- while (__beg != __end && __i < sizeof(__buf) / sizeof(_CharT))
- {
- __buf[__i++] = *__beg;
- ++__beg;
- }
- _Rep* __r = _Rep::_S_create(__i, __a);
- traits_type::copy(__r->_M_refdata(), __buf, __i);
- __r->_M_length = __i;
- try
- {
- // NB: this loop looks precisely this way because
- // it avoids comparing __beg != __end any more
- // than strictly necessary; != might be expensive!
- for (;;)
- {
- _CharT* __p = __r->_M_refdata() + __r->_M_length;
- _CharT* __last = __r->_M_refdata() + __r->_M_capacity;
- for (;;)
- {
- if (__beg == __end)
- {
- __r->_M_length = __p - __r->_M_refdata();
- *__p = _Rep::_S_terminal; // grrr.
- return __r->_M_refdata();
- }
- if (__p == __last)
- break;
- *__p++ = *__beg;
- ++__beg;
- }
- // Allocate more space.
- size_type __len = __p - __r->_M_refdata();
- _Rep* __another = _Rep::_S_create(__len + 1, __a);
- traits_type::copy(__another->_M_refdata(),
- __r->_M_refdata(), __len);
- __r->_M_destroy(__a);
- __r = __another;
- __r->_M_length = __len;
- }
- }
- catch(...)
- {
- __r->_M_destroy(__a);
- __throw_exception_again;
- }
- return 0;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- template <class _InIter>
- _CharT*
- basic_string<_CharT, _Traits, _Alloc>::
- _S_construct(_InIter __beg, _InIter __end, const _Alloc& __a,
- forward_iterator_tag)
- {
- size_type __dnew = static_cast<size_type>(distance(__beg, __end));
-
- // NB: Not required, but considered best practice.
- if (__builtin_expect(__beg == _InIter(), 0))
- __throw_logic_error("attempt to create string with null pointer");
-
- if (__beg == __end && __a == _Alloc())
- return _S_empty_rep()._M_refcopy();
-
- // Check for out_of_range and length_error exceptions.
- _Rep* __r = _Rep::_S_create(__dnew, __a);
- try
- { _S_copy_chars(__r->_M_refdata(), __beg, __end); }
- catch(...)
- {
- __r->_M_destroy(__a);
- __throw_exception_again;
- }
- __r->_M_length = __dnew;
-
- __r->_M_refdata()[__dnew] = _Rep::_S_terminal; // grrr.
- return __r->_M_refdata();
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- _CharT*
- basic_string<_CharT, _Traits, _Alloc>::
- _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
- {
- if (__n == 0 && __a == _Alloc())
- return _S_empty_rep()._M_refcopy();
-
- // Check for out_of_range and length_error exceptions.
- _Rep* __r = _Rep::_S_create(__n, __a);
- try
- {
- if (__n)
- traits_type::assign(__r->_M_refdata(), __n, __c);
- }
- catch(...)
- {
- __r->_M_destroy(__a);
- __throw_exception_again;
- }
- __r->_M_length = __n;
- __r->_M_refdata()[__n] = _Rep::_S_terminal; // grrr
- return __r->_M_refdata();
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const basic_string& __str)
- : _M_dataplus(__str._M_rep()->_M_grab(_Alloc(), __str.get_allocator()),
- __str.get_allocator())
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const _Alloc& __a)
- : _M_dataplus(_S_construct(size_type(), _CharT(), __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const basic_string& __str, size_type __pos, size_type __n)
- : _M_dataplus(_S_construct(__str._M_check(__pos),
- __str._M_fold(__pos, __n), _Alloc()), _Alloc())
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const basic_string& __str, size_type __pos,
- size_type __n, const _Alloc& __a)
- : _M_dataplus(_S_construct(__str._M_check(__pos),
- __str._M_fold(__pos, __n), __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const _CharT* __s, size_type __n, const _Alloc& __a)
- : _M_dataplus(_S_construct(__s, __s + __n, __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(const _CharT* __s, const _Alloc& __a)
- : _M_dataplus(_S_construct(__s, __s ? __s + traits_type::length(__s) : 0,
- __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(size_type __n, _CharT __c, const _Alloc& __a)
- : _M_dataplus(_S_construct(__n, __c, __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- template<typename _InputIter>
- basic_string<_CharT, _Traits, _Alloc>::
- basic_string(_InputIter __beg, _InputIter __end, const _Alloc& __a)
- : _M_dataplus(_S_construct(__beg, __end, __a), __a)
- { }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::assign(const basic_string& __str)
- {
- if (_M_rep() != __str._M_rep())
- {
- // XXX MT
- allocator_type __a = this->get_allocator();
- _CharT* __tmp = __str._M_rep()->_M_grab(__a, __str.get_allocator());
- _M_rep()->_M_dispose(__a);
- _M_data(__tmp);
- }
- return *this;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- void
- basic_string<_CharT, _Traits, _Alloc>::_Rep::
- _M_destroy(const _Alloc& __a) throw ()
- {
- size_type __size = sizeof(_Rep) + (_M_capacity + 1) * sizeof(_CharT);
- _Raw_bytes_alloc(__a).deallocate(reinterpret_cast<char*>(this), __size);
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- void
- basic_string<_CharT, _Traits, _Alloc>::_M_leak_hard()
- {
- if (_M_rep()->_M_is_shared())
- _M_mutate(0, 0, 0);
- _M_rep()->_M_set_leaked();
- }
-
- // _M_mutate and, below, _M_clone, include, in the same form, an exponential
- // growth policy, necessary to meet amortized linear time requirements of
- // the library: see http://gcc.gnu.org/ml/libstdc++/2001-07/msg00085.html.
- // The policy is active for allocations requiring an amount of memory above
- // system pagesize. This is consistent with the requirements of the standard:
- // see, f.i., http://gcc.gnu.org/ml/libstdc++/2001-07/msg00130.html
- template<typename _CharT, typename _Traits, typename _Alloc>
- void
- basic_string<_CharT, _Traits, _Alloc>::
- _M_mutate(size_type __pos, size_type __len1, size_type __len2)
- {
- size_type __old_size = this->size();
- const size_type __new_size = __old_size + __len2 - __len1;
- const _CharT* __src = _M_data() + __pos + __len1;
- const size_type __how_much = __old_size - __pos - __len1;
-
- if (_M_rep()->_M_is_shared() || __new_size > capacity())
- {
- // Must reallocate.
- allocator_type __a = get_allocator();
- // See below (_S_create) for the meaning and value of these
- // constants.
- const size_type __pagesize = 4096;
- const size_type __malloc_header_size = 4 * sizeof (void*);
- // The biggest string which fits in a memory page
- const size_type __page_capacity = (__pagesize - __malloc_header_size
- - sizeof(_Rep) - sizeof(_CharT))
- / sizeof(_CharT);
- _Rep* __r;
- if (__new_size > capacity() && __new_size > __page_capacity)
- // Growing exponentially.
- __r = _Rep::_S_create(__new_size > 2*capacity() ?
- __new_size : 2*capacity(), __a);
- else
- __r = _Rep::_S_create(__new_size, __a);
- try
- {
- if (__pos)
- traits_type::copy(__r->_M_refdata(), _M_data(), __pos);
- if (__how_much)
- traits_type::copy(__r->_M_refdata() + __pos + __len2,
- __src, __how_much);
- }
- catch(...)
- {
- __r->_M_dispose(get_allocator());
- __throw_exception_again;
- }
- _M_rep()->_M_dispose(__a);
- _M_data(__r->_M_refdata());
- }
- else if (__how_much && __len1 != __len2)
- {
- // Work in-place
- traits_type::move(_M_data() + __pos + __len2, __src, __how_much);
- }
- _M_rep()->_M_set_sharable();
- _M_rep()->_M_length = __new_size;
- _M_data()[__new_size] = _Rep::_S_terminal; // grrr. (per 21.3.4)
- // You cannot leave those LWG people alone for a second.
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- void
- basic_string<_CharT, _Traits, _Alloc>::reserve(size_type __res)
- {
- if (__res > this->capacity() || _M_rep()->_M_is_shared())
- {
- if (__res > this->max_size())
- __throw_length_error("basic_string::reserve");
- // Make sure we don't shrink below the current size
- if (__res < this->size())
- __res = this->size();
- allocator_type __a = get_allocator();
- _CharT* __tmp = _M_rep()->_M_clone(__a, __res - this->size());
- _M_rep()->_M_dispose(__a);
- _M_data(__tmp);
- }
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- void basic_string<_CharT, _Traits, _Alloc>::swap(basic_string& __s)
- {
- if (_M_rep()->_M_is_leaked())
- _M_rep()->_M_set_sharable();
- if (__s._M_rep()->_M_is_leaked())
- __s._M_rep()->_M_set_sharable();
- if (this->get_allocator() == __s.get_allocator())
- {
- _CharT* __tmp = _M_data();
- _M_data(__s._M_data());
- __s._M_data(__tmp);
- }
- // The code below can usually be optimized away.
- else
- {
- basic_string __tmp1(_M_ibegin(), _M_iend(), __s.get_allocator());
- basic_string __tmp2(__s._M_ibegin(), __s._M_iend(),
- this->get_allocator());
- *this = __tmp2;
- __s = __tmp1;
- }
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::_Rep*
- basic_string<_CharT, _Traits, _Alloc>::_Rep::
- _S_create(size_t __capacity, const _Alloc& __alloc)
- {
- typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // 83. String::npos vs. string::max_size()
- if (__capacity > _S_max_size)
- #else
- if (__capacity == npos)
- #endif
- __throw_length_error("basic_string::_S_create");
-
- // NB: Need an array of char_type[__capacity], plus a
- // terminating null char_type() element, plus enough for the
- // _Rep data structure. Whew. Seemingly so needy, yet so elemental.
- size_t __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
-
- // The standard places no restriction on allocating more memory
- // than is strictly needed within this layer at the moment or as
- // requested by an explicit application call to reserve(). Many
- // malloc implementations perform quite poorly when an
- // application attempts to allocate memory in a stepwise fashion
- // growing each allocation size by only 1 char. Additionally,
- // it makes little sense to allocate less linear memory than the
- // natural blocking size of the malloc implementation.
- // Unfortunately, we would need a somewhat low-level calculation
- // with tuned parameters to get this perfect for any particular
- // malloc implementation. Fortunately, generalizations about
- // common features seen among implementations seems to suffice.
-
- // __pagesize need not match the actual VM page size for good
- // results in practice, thus we pick a common value on the low
- // side. __malloc_header_size is an estimate of the amount of
- // overhead per memory allocation (in practice seen N * sizeof
- // (void*) where N is 0, 2 or 4). According to folklore,
- // picking this value on the high side is better than
- // low-balling it (especially when this algorithm is used with
- // malloc implementations that allocate memory blocks rounded up
- // to a size which is a power of 2).
- const size_t __pagesize = 4096; // must be 2^i * __subpagesize
- const size_t __subpagesize = 128; // should be >> __malloc_header_size
- const size_t __malloc_header_size = 4 * sizeof (void*);
- if ((__size + __malloc_header_size) > __pagesize)
- {
- size_t __extra =
- (__pagesize - ((__size + __malloc_header_size) % __pagesize))
- % __pagesize;
- __capacity += __extra / sizeof(_CharT);
- __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
- }
- else if (__size > __subpagesize)
- {
- size_t __extra =
- (__subpagesize - ((__size + __malloc_header_size) % __subpagesize))
- % __subpagesize;
- __capacity += __extra / sizeof(_CharT);
- __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
- }
-
- // NB: Might throw, but no worries about a leak, mate: _Rep()
- // does not throw.
- void* __place = _Raw_bytes_alloc(__alloc).allocate(__size);
- _Rep *__p = new (__place) _Rep;
- __p->_M_capacity = __capacity;
- __p->_M_set_sharable(); // One reference.
- __p->_M_length = 0;
- return __p;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- _CharT*
- basic_string<_CharT, _Traits, _Alloc>::_Rep::
- _M_clone(const _Alloc& __alloc, size_type __res)
- {
- // Requested capacity of the clone.
- const size_type __requested_cap = _M_length + __res;
- // See above (_S_create) for the meaning and value of these constants.
- const size_type __pagesize = 4096;
- const size_type __malloc_header_size = 4 * sizeof (void*);
- // The biggest string which fits in a memory page.
- const size_type __page_capacity =
- (__pagesize - __malloc_header_size - sizeof(_Rep) - sizeof(_CharT))
- / sizeof(_CharT);
- _Rep* __r;
- if (__requested_cap > _M_capacity && __requested_cap > __page_capacity)
- // Growing exponentially.
- __r = _Rep::_S_create(__requested_cap > 2*_M_capacity ?
- __requested_cap : 2*_M_capacity, __alloc);
- else
- __r = _Rep::_S_create(__requested_cap, __alloc);
-
- if (_M_length)
- {
- try
- { traits_type::copy(__r->_M_refdata(), _M_refdata(), _M_length); }
- catch(...)
- {
- __r->_M_destroy(__alloc);
- __throw_exception_again;
- }
- }
- __r->_M_length = _M_length;
- return __r->_M_refdata();
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- void
- basic_string<_CharT, _Traits, _Alloc>::resize(size_type __n, _CharT __c)
- {
- if (__n > max_size())
- __throw_length_error("basic_string::resize");
- size_type __size = this->size();
- if (__size < __n)
- this->append(__n - __size, __c);
- else if (__n < __size)
- this->erase(__n);
- // else nothing (in particular, avoid calling _M_mutate() unnecessarily.)
- }
-
-
- // This is the general replace helper, which currently gets instantiated both
- // for input iterators and reverse iterators. It buffers internally and then
- // calls _M_replace_safe.
- template<typename _CharT, typename _Traits, typename _Alloc>
- template<typename _InputIter>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- _M_replace(iterator __i1, iterator __i2, _InputIter __k1,
- _InputIter __k2, input_iterator_tag)
- {
- // Save concerned source string data in a temporary.
- basic_string __s(__k1, __k2);
- return _M_replace_safe(__i1, __i2, __s._M_ibegin(), __s._M_iend());
- }
-
- // This is a special replace helper, which does not buffer internally
- // and can be used in "safe" situations involving forward iterators,
- // i.e., when source and destination ranges are known to not overlap.
- template<typename _CharT, typename _Traits, typename _Alloc>
- template<typename _ForwardIter>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- _M_replace_safe(iterator __i1, iterator __i2, _ForwardIter __k1,
- _ForwardIter __k2)
- {
- size_type __dnew = static_cast<size_type>(distance(__k1, __k2));
- size_type __dold = __i2 - __i1;
- size_type __dmax = this->max_size();
-
- if (__dmax <= __dnew)
- __throw_length_error("basic_string::_M_replace");
- size_type __off = __i1 - _M_ibegin();
- _M_mutate(__off, __dold, __dnew);
-
- // Invalidated __i1, __i2
- if (__dnew)
- _S_copy_chars(_M_data() + __off, __k1, __k2);
-
- return *this;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- replace(size_type __pos1, size_type __n1, const basic_string& __str,
- size_type __pos2, size_type __n2)
- {
- const size_type __strsize = __str.size();
- if (__pos2 > __strsize)
- __throw_out_of_range("basic_string::replace");
- const bool __testn2 = __n2 < __strsize - __pos2;
- const size_type __foldn2 = __testn2 ? __n2 : __strsize - __pos2;
- return this->replace(__pos1, __n1,
- __str._M_data() + __pos2, __foldn2);
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- append(const basic_string& __str)
- {
- // Iff appending itself, string needs to pre-reserve the
- // correct size so that _M_mutate does not clobber the
- // iterators formed here.
- size_type __size = __str.size();
- size_type __len = __size + this->size();
- if (__len > this->capacity())
- this->reserve(__len);
- return _M_replace_safe(_M_iend(), _M_iend(), __str._M_ibegin(),
- __str._M_iend());
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- append(const basic_string& __str, size_type __pos, size_type __n)
- {
- // Iff appending itself, string needs to pre-reserve the
- // correct size so that _M_mutate does not clobber the
- // iterators formed here.
- size_type __len = min(__str.size() - __pos, __n) + this->size();
- if (__len > this->capacity())
- this->reserve(__len);
- return _M_replace_safe(_M_iend(), _M_iend(), __str._M_check(__pos),
- __str._M_fold(__pos, __n));
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- append(const _CharT* __s, size_type __n)
- {
- size_type __len = __n + this->size();
- if (__len > this->capacity())
- this->reserve(__len);
- return _M_replace_safe(_M_iend(), _M_iend(), __s, __s + __n);
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- append(size_type __n, _CharT __c)
- {
- size_type __len = __n + this->size();
- if (__len > this->capacity())
- this->reserve(__len);
- return this->replace(_M_iend(), _M_iend(), __n, __c);
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>
- operator+(const _CharT* __lhs,
- const basic_string<_CharT, _Traits, _Alloc>& __rhs)
- {
- typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
- typedef typename __string_type::size_type __size_type;
- __size_type __len = _Traits::length(__lhs);
- __string_type __str;
- __str.reserve(__len + __rhs.size());
- __str.append(__lhs, __lhs + __len);
- __str.append(__rhs);
- return __str;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>
- operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Alloc>& __rhs)
- {
- typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
- typedef typename __string_type::size_type __size_type;
- __string_type __str;
- __size_type __len = __rhs.size();
- __str.reserve(__len + 1);
- __str.append(__size_type(1), __lhs);
- __str.append(__rhs);
- return __str;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- basic_string<_CharT, _Traits, _Alloc>&
- basic_string<_CharT, _Traits, _Alloc>::
- replace(iterator __i1, iterator __i2, size_type __n2, _CharT __c)
- {
- size_type __n1 = __i2 - __i1;
- size_type __off1 = __i1 - _M_ibegin();
- if (max_size() - (this->size() - __n1) <= __n2)
- __throw_length_error("basic_string::replace");
- _M_mutate (__off1, __n1, __n2);
- // Invalidated __i1, __i2
- if (__n2)
- traits_type::assign(_M_data() + __off1, __n2, __c);
- return *this;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- copy(_CharT* __s, size_type __n, size_type __pos) const
- {
- if (__pos > this->size())
- __throw_out_of_range("basic_string::copy");
-
- if (__n > this->size() - __pos)
- __n = this->size() - __pos;
-
- traits_type::copy(__s, _M_data() + __pos, __n);
- // 21.3.5.7 par 3: do not append null. (good.)
- return __n;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find(const _CharT* __s, size_type __pos, size_type __n) const
- {
- size_type __size = this->size();
- size_t __xpos = __pos;
- const _CharT* __data = _M_data();
- for (; __xpos + __n <= __size; ++__xpos)
- if (traits_type::compare(__data + __xpos, __s, __n) == 0)
- return __xpos;
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find(_CharT __c, size_type __pos) const
- {
- size_type __size = this->size();
- size_type __ret = npos;
- if (__pos < __size)
- {
- const _CharT* __data = _M_data();
- size_type __n = __size - __pos;
- const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
- if (__p)
- __ret = __p - __data;
- }
- return __ret;
- }
-
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- rfind(const _CharT* __s, size_type __pos, size_type __n) const
- {
- size_type __size = this->size();
- if (__n <= __size)
- {
- __pos = std::min(__size - __n, __pos);
- const _CharT* __data = _M_data();
- do
- {
- if (traits_type::compare(__data + __pos, __s, __n) == 0)
- return __pos;
- }
- while (__pos-- > 0);
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- rfind(_CharT __c, size_type __pos) const
- {
- size_type __size = this->size();
- if (__size)
- {
- size_t __xpos = __size - 1;
- if (__xpos > __pos)
- __xpos = __pos;
-
- for (++__xpos; __xpos-- > 0; )
- if (traits_type::eq(_M_data()[__xpos], __c))
- return __xpos;
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
- {
- for (; __n && __pos < this->size(); ++__pos)
- {
- const _CharT* __p = traits_type::find(__s, __n, _M_data()[__pos]);
- if (__p)
- return __pos;
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
- {
- size_type __size = this->size();
- if (__size && __n)
- {
- if (--__size > __pos)
- __size = __pos;
- do
- {
- if (traits_type::find(__s, __n, _M_data()[__size]))
- return __size;
- }
- while (__size-- != 0);
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
- {
- size_t __xpos = __pos;
- for (; __xpos < this->size(); ++__xpos)
- if (!traits_type::find(__s, __n, _M_data()[__xpos]))
- return __xpos;
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_first_not_of(_CharT __c, size_type __pos) const
- {
- size_t __xpos = __pos;
- for (; __xpos < this->size(); ++__xpos)
- if (!traits_type::eq(_M_data()[__xpos], __c))
- return __xpos;
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
- {
- size_type __size = this->size();
- if (__size)
- {
- if (--__size > __pos)
- __size = __pos;
- do
- {
- if (!traits_type::find(__s, __n, _M_data()[__size]))
- return __size;
- }
- while (__size--);
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- typename basic_string<_CharT, _Traits, _Alloc>::size_type
- basic_string<_CharT, _Traits, _Alloc>::
- find_last_not_of(_CharT __c, size_type __pos) const
- {
- size_type __size = this->size();
- if (__size)
- {
- if (--__size > __pos)
- __size = __pos;
- do
- {
- if (!traits_type::eq(_M_data()[__size], __c))
- return __size;
- }
- while (__size--);
- }
- return npos;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- int
- basic_string<_CharT, _Traits, _Alloc>::
- compare(size_type __pos, size_type __n, const basic_string& __str) const
- {
- size_type __size = this->size();
- size_type __osize = __str.size();
- if (__pos > __size)
- __throw_out_of_range("basic_string::compare");
-
- size_type __rsize= min(__size - __pos, __n);
- size_type __len = min(__rsize, __osize);
- int __r = traits_type::compare(_M_data() + __pos, __str.data(), __len);
- if (!__r)
- __r = __rsize - __osize;
- return __r;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- int
- basic_string<_CharT, _Traits, _Alloc>::
- compare(size_type __pos1, size_type __n1, const basic_string& __str,
- size_type __pos2, size_type __n2) const
- {
- size_type __size = this->size();
- size_type __osize = __str.size();
- if (__pos1 > __size || __pos2 > __osize)
- __throw_out_of_range("basic_string::compare");
-
- size_type __rsize = min(__size - __pos1, __n1);
- size_type __rosize = min(__osize - __pos2, __n2);
- size_type __len = min(__rsize, __rosize);
- int __r = traits_type::compare(_M_data() + __pos1,
- __str.data() + __pos2, __len);
- if (!__r)
- __r = __rsize - __rosize;
- return __r;
- }
-
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- int
- basic_string<_CharT, _Traits, _Alloc>::
- compare(const _CharT* __s) const
- {
- size_type __size = this->size();
- int __r = traits_type::compare(_M_data(), __s, __size);
- if (!__r)
- __r = __size - traits_type::length(__s);
- return __r;
- }
-
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- int
- basic_string <_CharT, _Traits, _Alloc>::
- compare(size_type __pos, size_type __n1, const _CharT* __s) const
- {
- size_type __size = this->size();
- if (__pos > __size)
- __throw_out_of_range("basic_string::compare");
-
- size_type __osize = traits_type::length(__s);
- size_type __rsize = min(__size - __pos, __n1);
- size_type __len = min(__rsize, __osize);
- int __r = traits_type::compare(_M_data() + __pos, __s, __len);
- if (!__r)
- __r = __rsize - __osize;
- return __r;
- }
-
- template<typename _CharT, typename _Traits, typename _Alloc>
- int
- basic_string <_CharT, _Traits, _Alloc>::
- compare(size_type __pos, size_type __n1, const _CharT* __s,
- size_type __n2) const
- {
- size_type __size = this->size();
- if (__pos > __size)
- __throw_out_of_range("basic_string::compare");
-
- size_type __osize = min(traits_type::length(__s), __n2);
- size_type __rsize = min(__size - __pos, __n1);
- size_type __len = min(__rsize, __osize);
- int __r = traits_type::compare(_M_data() + __pos, __s, __len);
- if (!__r)
- __r = __rsize - __osize;
- return __r;
- }
-
- template <class _CharT, class _Traits, class _Alloc>
- void
- _S_string_copy(const basic_string<_CharT, _Traits, _Alloc>& __str,
- _CharT* __buf, typename _Alloc::size_type __bufsiz)
- {
- typedef typename _Alloc::size_type size_type;
- size_type __strsize = __str.size();
- size_type __bytes = min(__strsize, __bufsiz - 1);
- _Traits::copy(__buf, __str.data(), __bytes);
- __buf[__bytes] = _CharT();
- }
-
- // Inhibit implicit instantiations for required instantiations,
- // which are defined via explicit instantiations elsewhere.
- // NB: This syntax is a GNU extension.
- extern template class basic_string<char>;
- extern template
- basic_istream<char>&
- operator>>(basic_istream<char>&, string&);
- extern template
- basic_ostream<char>&
- operator<<(basic_ostream<char>&, const string&);
- extern template
- basic_istream<char>&
- getline(basic_istream<char>&, string&, char);
- extern template
- basic_istream<char>&
- getline(basic_istream<char>&, string&);
-
- extern template class basic_string<wchar_t>;
- extern template
- basic_istream<wchar_t>&
- operator>>(basic_istream<wchar_t>&, wstring&);
- extern template
- basic_ostream<wchar_t>&
- operator<<(basic_ostream<wchar_t>&, const wstring&);
- extern template
- basic_istream<wchar_t>&
- getline(basic_istream<wchar_t>&, wstring&, wchar_t);
- extern template
- basic_istream<wchar_t>&
- getline(basic_istream<wchar_t>&, wstring&);
- } // namespace std
-
- #endif
-