xref: /freebsd-12.1/contrib/libc++/include/sstream (revision fb142d88) 
1// -*- C++ -*-
2//===--------------------------- sstream ----------------------------------===//
3//
4//                     The LLVM Compiler Infrastructure
5//
6// This file is dual licensed under the MIT and the University of Illinois Open
7// Source Licenses. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10
11#ifndef _LIBCPP_SSTREAM
12#define _LIBCPP_SSTREAM
13
14/*
15    sstream synopsis
16
17template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
18class basic_stringbuf
19    : public basic_streambuf<charT, traits>
20{
21public:
22    typedef charT                          char_type;
23    typedef traits                         traits_type;
24    typedef typename traits_type::int_type int_type;
25    typedef typename traits_type::pos_type pos_type;
26    typedef typename traits_type::off_type off_type;
27    typedef Allocator                      allocator_type;
28
29    // 27.8.1.1 Constructors:
30    explicit basic_stringbuf(ios_base::openmode which = ios_base::in | ios_base::out);
31    explicit basic_stringbuf(const basic_string<char_type, traits_type, allocator_type>& str,
32                             ios_base::openmode which = ios_base::in | ios_base::out);
33    basic_stringbuf(basic_stringbuf&& rhs);
34
35    // 27.8.1.2 Assign and swap:
36    basic_stringbuf& operator=(basic_stringbuf&& rhs);
37    void swap(basic_stringbuf& rhs);
38
39    // 27.8.1.3 Get and set:
40    basic_string<char_type, traits_type, allocator_type> str() const;
41    void str(const basic_string<char_type, traits_type, allocator_type>& s);
42
43protected:
44    // 27.8.1.4 Overridden virtual functions:
45    virtual int_type underflow();
46    virtual int_type pbackfail(int_type c = traits_type::eof());
47    virtual int_type overflow (int_type c = traits_type::eof());
48    virtual basic_streambuf<char_type, traits_type>* setbuf(char_type*, streamsize);
49    virtual pos_type seekoff(off_type off, ios_base::seekdir way,
50                             ios_base::openmode which = ios_base::in | ios_base::out);
51    virtual pos_type seekpos(pos_type sp,
52                             ios_base::openmode which = ios_base::in | ios_base::out);
53};
54
55template <class charT, class traits, class Allocator>
56  void swap(basic_stringbuf<charT, traits, Allocator>& x,
57            basic_stringbuf<charT, traits, Allocator>& y);
58
59typedef basic_stringbuf<char>    stringbuf;
60typedef basic_stringbuf<wchar_t> wstringbuf;
61
62template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
63class basic_istringstream
64    : public basic_istream<charT, traits>
65{
66public:
67    typedef charT                          char_type;
68    typedef traits                         traits_type;
69    typedef typename traits_type::int_type int_type;
70    typedef typename traits_type::pos_type pos_type;
71    typedef typename traits_type::off_type off_type;
72    typedef Allocator                      allocator_type;
73
74    // 27.8.2.1 Constructors:
75    explicit basic_istringstream(ios_base::openmode which = ios_base::in);
76    explicit basic_istringstream(const basic_string<char_type, traits_type,allocator_type>& str,
77                                 ios_base::openmode which = ios_base::in);
78    basic_istringstream(basic_istringstream&& rhs);
79
80    // 27.8.2.2 Assign and swap:
81    basic_istringstream& operator=(basic_istringstream&& rhs);
82    void swap(basic_istringstream& rhs);
83
84    // 27.8.2.3 Members:
85    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
86    basic_string<char_type, traits_type, allocator_type> str() const;
87    void str(const basic_string<char_type, traits_type, allocator_type>& s);
88};
89
90template <class charT, class traits, class Allocator>
91  void swap(basic_istringstream<charT, traits, Allocator>& x,
92            basic_istringstream<charT, traits, Allocator>& y);
93
94typedef basic_istringstream<char>    istringstream;
95typedef basic_istringstream<wchar_t> wistringstream;
96
97template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
98class basic_ostringstream
99    : public basic_ostream<charT, traits>
100{
101public:
102    // types:
103    typedef charT                          char_type;
104    typedef traits                         traits_type;
105    typedef typename traits_type::int_type int_type;
106    typedef typename traits_type::pos_type pos_type;
107    typedef typename traits_type::off_type off_type;
108    typedef Allocator                      allocator_type;
109
110    // 27.8.3.1 Constructors/destructor:
111    explicit basic_ostringstream(ios_base::openmode which = ios_base::out);
112    explicit basic_ostringstream(const basic_string<char_type, traits_type, allocator_type>& str,
113                                 ios_base::openmode which = ios_base::out);
114    basic_ostringstream(basic_ostringstream&& rhs);
115
116    // 27.8.3.2 Assign/swap:
117    basic_ostringstream& operator=(basic_ostringstream&& rhs);
118    void swap(basic_ostringstream& rhs);
119
120    // 27.8.3.3 Members:
121    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
122    basic_string<char_type, traits_type, allocator_type> str() const;
123    void str(const basic_string<char_type, traits_type, allocator_type>& s);
124};
125
126template <class charT, class traits, class Allocator>
127  void swap(basic_ostringstream<charT, traits, Allocator>& x,
128            basic_ostringstream<charT, traits, Allocator>& y);
129
130typedef basic_ostringstream<char>    ostringstream;
131typedef basic_ostringstream<wchar_t> wostringstream;
132
133template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
134class basic_stringstream
135    : public basic_iostream<charT, traits>
136{
137public:
138    // types:
139    typedef charT                          char_type;
140    typedef traits                         traits_type;
141    typedef typename traits_type::int_type int_type;
142    typedef typename traits_type::pos_type pos_type;
143    typedef typename traits_type::off_type off_type;
144    typedef Allocator                      allocator_type;
145
146    // constructors/destructor
147    explicit basic_stringstream(ios_base::openmode which = ios_base::out|ios_base::in);
148    explicit basic_stringstream(const basic_string<char_type, traits_type, allocator_type>& str,
149                                ios_base::openmode which = ios_base::out|ios_base::in);
150    basic_stringstream(basic_stringstream&& rhs);
151
152    // 27.8.5.1 Assign/swap:
153    basic_stringstream& operator=(basic_stringstream&& rhs);
154    void swap(basic_stringstream& rhs);
155
156    // Members:
157    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
158    basic_string<char_type, traits_type, allocator_type> str() const;
159    void str(const basic_string<char_type, traits_type, allocator_type>& str);
160};
161
162template <class charT, class traits, class Allocator>
163  void swap(basic_stringstream<charT, traits, Allocator>& x,
164            basic_stringstream<charT, traits, Allocator>& y);
165
166typedef basic_stringstream<char>    stringstream;
167typedef basic_stringstream<wchar_t> wstringstream;
168
169}  // std
170
171*/
172
173#include <__config>
174#include <ostream>
175#include <istream>
176#include <string>
177
178#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
179#pragma GCC system_header
180#endif
181
182_LIBCPP_PUSH_MACROS
183#include <__undef_macros>
184
185
186_LIBCPP_BEGIN_NAMESPACE_STD
187
188// basic_stringbuf
189
190template <class _CharT, class _Traits, class _Allocator>
191class _LIBCPP_TEMPLATE_VIS basic_stringbuf
192    : public basic_streambuf<_CharT, _Traits>
193{
194public:
195    typedef _CharT                         char_type;
196    typedef _Traits                        traits_type;
197    typedef typename traits_type::int_type int_type;
198    typedef typename traits_type::pos_type pos_type;
199    typedef typename traits_type::off_type off_type;
200    typedef _Allocator                     allocator_type;
201
202    typedef basic_string<char_type, traits_type, allocator_type> string_type;
203
204private:
205
206    string_type __str_;
207    mutable char_type* __hm_;
208    ios_base::openmode __mode_;
209
210public:
211    // 27.8.1.1 Constructors:
212    inline _LIBCPP_INLINE_VISIBILITY
213    explicit basic_stringbuf(ios_base::openmode __wch = ios_base::in | ios_base::out);
214    inline _LIBCPP_INLINE_VISIBILITY
215    explicit basic_stringbuf(const string_type& __s,
216                             ios_base::openmode __wch = ios_base::in | ios_base::out);
217#ifndef _LIBCPP_CXX03_LANG
218    basic_stringbuf(basic_stringbuf&& __rhs);
219
220    // 27.8.1.2 Assign and swap:
221    basic_stringbuf& operator=(basic_stringbuf&& __rhs);
222#endif
223    void swap(basic_stringbuf& __rhs);
224
225    // 27.8.1.3 Get and set:
226    string_type str() const;
227    void str(const string_type& __s);
228
229protected:
230    // 27.8.1.4 Overridden virtual functions:
231    virtual int_type underflow();
232    virtual int_type pbackfail(int_type __c = traits_type::eof());
233    virtual int_type overflow (int_type __c = traits_type::eof());
234    virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
235                             ios_base::openmode __wch = ios_base::in | ios_base::out);
236    inline _LIBCPP_INLINE_VISIBILITY
237    virtual pos_type seekpos(pos_type __sp,
238                             ios_base::openmode __wch = ios_base::in | ios_base::out);
239};
240
241template <class _CharT, class _Traits, class _Allocator>
242basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(ios_base::openmode __wch)
243    : __hm_(0),
244      __mode_(__wch)
245{
246}
247
248template <class _CharT, class _Traits, class _Allocator>
249basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(const string_type& __s,
250                             ios_base::openmode __wch)
251    : __str_(__s.get_allocator()),
252      __hm_(0),
253      __mode_(__wch)
254{
255    str(__s);
256}
257
258#ifndef _LIBCPP_CXX03_LANG
259
260template <class _CharT, class _Traits, class _Allocator>
261basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(basic_stringbuf&& __rhs)
262    : __mode_(__rhs.__mode_)
263{
264    char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
265    ptrdiff_t __binp = -1;
266    ptrdiff_t __ninp = -1;
267    ptrdiff_t __einp = -1;
268    if (__rhs.eback() != nullptr)
269    {
270        __binp = __rhs.eback() - __p;
271        __ninp = __rhs.gptr() - __p;
272        __einp = __rhs.egptr() - __p;
273    }
274    ptrdiff_t __bout = -1;
275    ptrdiff_t __nout = -1;
276    ptrdiff_t __eout = -1;
277    if (__rhs.pbase() != nullptr)
278    {
279        __bout = __rhs.pbase() - __p;
280        __nout = __rhs.pptr() - __p;
281        __eout = __rhs.epptr() - __p;
282    }
283    ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
284    __str_ = _VSTD::move(__rhs.__str_);
285    __p = const_cast<char_type*>(__str_.data());
286    if (__binp != -1)
287        this->setg(__p + __binp, __p + __ninp, __p + __einp);
288    if (__bout != -1)
289    {
290        this->setp(__p + __bout, __p + __eout);
291        this->__pbump(__nout);
292    }
293    __hm_ = __hm == -1 ? nullptr : __p + __hm;
294    __p = const_cast<char_type*>(__rhs.__str_.data());
295    __rhs.setg(__p, __p, __p);
296    __rhs.setp(__p, __p);
297    __rhs.__hm_ = __p;
298    this->pubimbue(__rhs.getloc());
299}
300
301template <class _CharT, class _Traits, class _Allocator>
302basic_stringbuf<_CharT, _Traits, _Allocator>&
303basic_stringbuf<_CharT, _Traits, _Allocator>::operator=(basic_stringbuf&& __rhs)
304{
305    char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
306    ptrdiff_t __binp = -1;
307    ptrdiff_t __ninp = -1;
308    ptrdiff_t __einp = -1;
309    if (__rhs.eback() != nullptr)
310    {
311        __binp = __rhs.eback() - __p;
312        __ninp = __rhs.gptr() - __p;
313        __einp = __rhs.egptr() - __p;
314    }
315    ptrdiff_t __bout = -1;
316    ptrdiff_t __nout = -1;
317    ptrdiff_t __eout = -1;
318    if (__rhs.pbase() != nullptr)
319    {
320        __bout = __rhs.pbase() - __p;
321        __nout = __rhs.pptr() - __p;
322        __eout = __rhs.epptr() - __p;
323    }
324    ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
325    __str_ = _VSTD::move(__rhs.__str_);
326    __p = const_cast<char_type*>(__str_.data());
327    if (__binp != -1)
328        this->setg(__p + __binp, __p + __ninp, __p + __einp);
329    else
330        this->setg(nullptr, nullptr, nullptr);
331    if (__bout != -1)
332    {
333        this->setp(__p + __bout, __p + __eout);
334        this->__pbump(__nout);
335    }
336    else
337        this->setp(nullptr, nullptr);
338
339    __hm_ = __hm == -1 ? nullptr : __p + __hm;
340    __mode_ = __rhs.__mode_;
341    __p = const_cast<char_type*>(__rhs.__str_.data());
342    __rhs.setg(__p, __p, __p);
343    __rhs.setp(__p, __p);
344    __rhs.__hm_ = __p;
345    this->pubimbue(__rhs.getloc());
346    return *this;
347}
348
349#endif  // _LIBCPP_CXX03_LANG
350
351template <class _CharT, class _Traits, class _Allocator>
352void
353basic_stringbuf<_CharT, _Traits, _Allocator>::swap(basic_stringbuf& __rhs)
354{
355    char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
356    ptrdiff_t __rbinp = -1;
357    ptrdiff_t __rninp = -1;
358    ptrdiff_t __reinp = -1;
359    if (__rhs.eback() != nullptr)
360    {
361        __rbinp = __rhs.eback() - __p;
362        __rninp = __rhs.gptr() - __p;
363        __reinp = __rhs.egptr() - __p;
364    }
365    ptrdiff_t __rbout = -1;
366    ptrdiff_t __rnout = -1;
367    ptrdiff_t __reout = -1;
368    if (__rhs.pbase() != nullptr)
369    {
370        __rbout = __rhs.pbase() - __p;
371        __rnout = __rhs.pptr() - __p;
372        __reout = __rhs.epptr() - __p;
373    }
374    ptrdiff_t __rhm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
375    __p = const_cast<char_type*>(__str_.data());
376    ptrdiff_t __lbinp = -1;
377    ptrdiff_t __lninp = -1;
378    ptrdiff_t __leinp = -1;
379    if (this->eback() != nullptr)
380    {
381        __lbinp = this->eback() - __p;
382        __lninp = this->gptr() - __p;
383        __leinp = this->egptr() - __p;
384    }
385    ptrdiff_t __lbout = -1;
386    ptrdiff_t __lnout = -1;
387    ptrdiff_t __leout = -1;
388    if (this->pbase() != nullptr)
389    {
390        __lbout = this->pbase() - __p;
391        __lnout = this->pptr() - __p;
392        __leout = this->epptr() - __p;
393    }
394    ptrdiff_t __lhm = __hm_ == nullptr ? -1 : __hm_ - __p;
395    _VSTD::swap(__mode_, __rhs.__mode_);
396    __str_.swap(__rhs.__str_);
397    __p = const_cast<char_type*>(__str_.data());
398    if (__rbinp != -1)
399        this->setg(__p + __rbinp, __p + __rninp, __p + __reinp);
400    else
401        this->setg(nullptr, nullptr, nullptr);
402    if (__rbout != -1)
403    {
404        this->setp(__p + __rbout, __p + __reout);
405        this->__pbump(__rnout);
406    }
407    else
408        this->setp(nullptr, nullptr);
409    __hm_ = __rhm == -1 ? nullptr : __p + __rhm;
410    __p = const_cast<char_type*>(__rhs.__str_.data());
411    if (__lbinp != -1)
412        __rhs.setg(__p + __lbinp, __p + __lninp, __p + __leinp);
413    else
414        __rhs.setg(nullptr, nullptr, nullptr);
415    if (__lbout != -1)
416    {
417        __rhs.setp(__p + __lbout, __p + __leout);
418        __rhs.__pbump(__lnout);
419    }
420    else
421        __rhs.setp(nullptr, nullptr);
422    __rhs.__hm_ = __lhm == -1 ? nullptr : __p + __lhm;
423    locale __tl = __rhs.getloc();
424    __rhs.pubimbue(this->getloc());
425    this->pubimbue(__tl);
426}
427
428template <class _CharT, class _Traits, class _Allocator>
429inline _LIBCPP_INLINE_VISIBILITY
430void
431swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x,
432     basic_stringbuf<_CharT, _Traits, _Allocator>& __y)
433{
434    __x.swap(__y);
435}
436
437template <class _CharT, class _Traits, class _Allocator>
438basic_string<_CharT, _Traits, _Allocator>
439basic_stringbuf<_CharT, _Traits, _Allocator>::str() const
440{
441    if (__mode_ & ios_base::out)
442    {
443        if (__hm_ < this->pptr())
444            __hm_ = this->pptr();
445        return string_type(this->pbase(), __hm_, __str_.get_allocator());
446    }
447    else if (__mode_ & ios_base::in)
448        return string_type(this->eback(), this->egptr(), __str_.get_allocator());
449    return string_type(__str_.get_allocator());
450}
451
452template <class _CharT, class _Traits, class _Allocator>
453void
454basic_stringbuf<_CharT, _Traits, _Allocator>::str(const string_type& __s)
455{
456    __str_ = __s;
457    __hm_ = 0;
458    if (__mode_ & ios_base::in)
459    {
460        __hm_ = const_cast<char_type*>(__str_.data()) + __str_.size();
461        this->setg(const_cast<char_type*>(__str_.data()),
462                   const_cast<char_type*>(__str_.data()),
463                   __hm_);
464    }
465    if (__mode_ & ios_base::out)
466    {
467        typename string_type::size_type __sz = __str_.size();
468        __hm_ = const_cast<char_type*>(__str_.data()) + __sz;
469        __str_.resize(__str_.capacity());
470        this->setp(const_cast<char_type*>(__str_.data()),
471                   const_cast<char_type*>(__str_.data()) + __str_.size());
472        if (__mode_ & (ios_base::app | ios_base::ate))
473        {
474            while (__sz > INT_MAX)
475            {
476            	this->pbump(INT_MAX);
477            	__sz -= INT_MAX;
478            }
479            if (__sz > 0)
480            	this->pbump(__sz);
481    	}
482    }
483}
484
485template <class _CharT, class _Traits, class _Allocator>
486typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
487basic_stringbuf<_CharT, _Traits, _Allocator>::underflow()
488{
489    if (__hm_ < this->pptr())
490        __hm_ = this->pptr();
491    if (__mode_ & ios_base::in)
492    {
493        if (this->egptr() < __hm_)
494            this->setg(this->eback(), this->gptr(), __hm_);
495        if (this->gptr() < this->egptr())
496            return traits_type::to_int_type(*this->gptr());
497    }
498    return traits_type::eof();
499}
500
501template <class _CharT, class _Traits, class _Allocator>
502typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
503basic_stringbuf<_CharT, _Traits, _Allocator>::pbackfail(int_type __c)
504{
505    if (__hm_ < this->pptr())
506        __hm_ = this->pptr();
507    if (this->eback() < this->gptr())
508    {
509        if (traits_type::eq_int_type(__c, traits_type::eof()))
510        {
511            this->setg(this->eback(), this->gptr()-1, __hm_);
512            return traits_type::not_eof(__c);
513        }
514        if ((__mode_ & ios_base::out) ||
515            traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]))
516        {
517            this->setg(this->eback(), this->gptr()-1, __hm_);
518            *this->gptr() = traits_type::to_char_type(__c);
519            return __c;
520        }
521    }
522    return traits_type::eof();
523}
524
525template <class _CharT, class _Traits, class _Allocator>
526typename basic_stringbuf<_CharT, _Traits, _Allocator>::int_type
527basic_stringbuf<_CharT, _Traits, _Allocator>::overflow(int_type __c)
528{
529    if (!traits_type::eq_int_type(__c, traits_type::eof()))
530    {
531        ptrdiff_t __ninp = this->gptr()  - this->eback();
532        if (this->pptr() == this->epptr())
533        {
534            if (!(__mode_ & ios_base::out))
535                return traits_type::eof();
536#ifndef _LIBCPP_NO_EXCEPTIONS
537            try
538            {
539#endif  // _LIBCPP_NO_EXCEPTIONS
540                ptrdiff_t __nout = this->pptr()  - this->pbase();
541                ptrdiff_t __hm = __hm_ - this->pbase();
542                __str_.push_back(char_type());
543                __str_.resize(__str_.capacity());
544                char_type* __p = const_cast<char_type*>(__str_.data());
545                this->setp(__p, __p + __str_.size());
546                this->__pbump(__nout);
547                __hm_ = this->pbase() + __hm;
548#ifndef _LIBCPP_NO_EXCEPTIONS
549            }
550            catch (...)
551            {
552                return traits_type::eof();
553            }
554#endif  // _LIBCPP_NO_EXCEPTIONS
555        }
556        __hm_ = _VSTD::max(this->pptr() + 1, __hm_);
557        if (__mode_ & ios_base::in)
558        {
559            char_type* __p = const_cast<char_type*>(__str_.data());
560            this->setg(__p, __p + __ninp, __hm_);
561        }
562        return this->sputc(__c);
563    }
564    return traits_type::not_eof(__c);
565}
566
567template <class _CharT, class _Traits, class _Allocator>
568typename basic_stringbuf<_CharT, _Traits, _Allocator>::pos_type
569basic_stringbuf<_CharT, _Traits, _Allocator>::seekoff(off_type __off,
570                                                      ios_base::seekdir __way,
571                                                      ios_base::openmode __wch)
572{
573    if (__hm_ < this->pptr())
574        __hm_ = this->pptr();
575    if ((__wch & (ios_base::in | ios_base::out)) == 0)
576        return pos_type(-1);
577    if ((__wch & (ios_base::in | ios_base::out)) == (ios_base::in | ios_base::out)
578        && __way == ios_base::cur)
579        return pos_type(-1);
580    off_type __noff;
581    switch (__way)
582    {
583    case ios_base::beg:
584        __noff = 0;
585        break;
586    case ios_base::cur:
587        if (__wch & ios_base::in)
588            __noff = this->gptr() - this->eback();
589        else
590            __noff = this->pptr() - this->pbase();
591        break;
592    case ios_base::end:
593        __noff = __hm_ - __str_.data();
594        break;
595    default:
596        return pos_type(-1);
597    }
598    __noff += __off;
599    if (__noff < 0 || __hm_ - __str_.data() < __noff)
600        return pos_type(-1);
601    if (__noff != 0)
602    {
603        if ((__wch & ios_base::in) && this->gptr() == 0)
604            return pos_type(-1);
605        if ((__wch & ios_base::out) && this->pptr() == 0)
606            return pos_type(-1);
607    }
608    if (__wch & ios_base::in)
609        this->setg(this->eback(), this->eback() + __noff, __hm_);
610    if (__wch & ios_base::out)
611    {
612        this->setp(this->pbase(), this->epptr());
613        this->pbump(__noff);
614    }
615    return pos_type(__noff);
616}
617
618template <class _CharT, class _Traits, class _Allocator>
619typename basic_stringbuf<_CharT, _Traits, _Allocator>::pos_type
620basic_stringbuf<_CharT, _Traits, _Allocator>::seekpos(pos_type __sp,
621                                                      ios_base::openmode __wch)
622{
623    return seekoff(__sp, ios_base::beg, __wch);
624}
625
626// basic_istringstream
627
628template <class _CharT, class _Traits, class _Allocator>
629class _LIBCPP_TEMPLATE_VIS basic_istringstream
630    : public basic_istream<_CharT, _Traits>
631{
632public:
633    typedef _CharT                         char_type;
634    typedef _Traits                        traits_type;
635    typedef typename traits_type::int_type int_type;
636    typedef typename traits_type::pos_type pos_type;
637    typedef typename traits_type::off_type off_type;
638    typedef _Allocator                     allocator_type;
639
640    typedef basic_string<char_type, traits_type, allocator_type> string_type;
641
642private:
643    basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
644
645public:
646    // 27.8.2.1 Constructors:
647    inline _LIBCPP_INLINE_VISIBILITY
648    explicit basic_istringstream(ios_base::openmode __wch = ios_base::in);
649    inline _LIBCPP_INLINE_VISIBILITY
650    explicit basic_istringstream(const string_type& __s,
651                                 ios_base::openmode __wch = ios_base::in);
652#ifndef _LIBCPP_CXX03_LANG
653    inline _LIBCPP_INLINE_VISIBILITY
654    basic_istringstream(basic_istringstream&& __rhs);
655
656    // 27.8.2.2 Assign and swap:
657    basic_istringstream& operator=(basic_istringstream&& __rhs);
658#endif  // _LIBCPP_CXX03_LANG
659    inline _LIBCPP_INLINE_VISIBILITY
660    void swap(basic_istringstream& __rhs);
661
662    // 27.8.2.3 Members:
663    inline _LIBCPP_INLINE_VISIBILITY
664    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
665    inline _LIBCPP_INLINE_VISIBILITY
666    string_type str() const;
667    inline _LIBCPP_INLINE_VISIBILITY
668    void str(const string_type& __s);
669};
670
671template <class _CharT, class _Traits, class _Allocator>
672basic_istringstream<_CharT, _Traits, _Allocator>::basic_istringstream(ios_base::openmode __wch)
673    : basic_istream<_CharT, _Traits>(&__sb_),
674      __sb_(__wch | ios_base::in)
675{
676}
677
678template <class _CharT, class _Traits, class _Allocator>
679basic_istringstream<_CharT, _Traits, _Allocator>::basic_istringstream(const string_type& __s,
680                                                                      ios_base::openmode __wch)
681    : basic_istream<_CharT, _Traits>(&__sb_),
682      __sb_(__s, __wch | ios_base::in)
683{
684}
685
686#ifndef _LIBCPP_CXX03_LANG
687
688template <class _CharT, class _Traits, class _Allocator>
689basic_istringstream<_CharT, _Traits, _Allocator>::basic_istringstream(basic_istringstream&& __rhs)
690    : basic_istream<_CharT, _Traits>(_VSTD::move(__rhs)),
691      __sb_(_VSTD::move(__rhs.__sb_))
692{
693    basic_istream<_CharT, _Traits>::set_rdbuf(&__sb_);
694}
695
696template <class _CharT, class _Traits, class _Allocator>
697basic_istringstream<_CharT, _Traits, _Allocator>&
698basic_istringstream<_CharT, _Traits, _Allocator>::operator=(basic_istringstream&& __rhs)
699{
700    basic_istream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
701    __sb_ = _VSTD::move(__rhs.__sb_);
702    return *this;
703}
704
705#endif  // _LIBCPP_CXX03_LANG
706
707template <class _CharT, class _Traits, class _Allocator>
708void basic_istringstream<_CharT, _Traits, _Allocator>::swap(basic_istringstream& __rhs)
709{
710    basic_istream<char_type, traits_type>::swap(__rhs);
711    __sb_.swap(__rhs.__sb_);
712}
713
714template <class _CharT, class _Traits, class _Allocator>
715inline _LIBCPP_INLINE_VISIBILITY
716void
717swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x,
718     basic_istringstream<_CharT, _Traits, _Allocator>& __y)
719{
720    __x.swap(__y);
721}
722
723template <class _CharT, class _Traits, class _Allocator>
724basic_stringbuf<_CharT, _Traits, _Allocator>*
725basic_istringstream<_CharT, _Traits, _Allocator>::rdbuf() const
726{
727    return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(&__sb_);
728}
729
730template <class _CharT, class _Traits, class _Allocator>
731basic_string<_CharT, _Traits, _Allocator>
732basic_istringstream<_CharT, _Traits, _Allocator>::str() const
733{
734    return __sb_.str();
735}
736
737template <class _CharT, class _Traits, class _Allocator>
738void basic_istringstream<_CharT, _Traits, _Allocator>::str(const string_type& __s)
739{
740    __sb_.str(__s);
741}
742
743// basic_ostringstream
744
745template <class _CharT, class _Traits, class _Allocator>
746class _LIBCPP_TEMPLATE_VIS basic_ostringstream
747    : public basic_ostream<_CharT, _Traits>
748{
749public:
750    typedef _CharT                         char_type;
751    typedef _Traits                        traits_type;
752    typedef typename traits_type::int_type int_type;
753    typedef typename traits_type::pos_type pos_type;
754    typedef typename traits_type::off_type off_type;
755    typedef _Allocator                     allocator_type;
756
757    typedef basic_string<char_type, traits_type, allocator_type> string_type;
758
759private:
760    basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
761
762public:
763    // 27.8.2.1 Constructors:
764    inline _LIBCPP_INLINE_VISIBILITY
765    explicit basic_ostringstream(ios_base::openmode __wch = ios_base::out);
766    inline _LIBCPP_INLINE_VISIBILITY
767    explicit basic_ostringstream(const string_type& __s,
768                                 ios_base::openmode __wch = ios_base::out);
769#ifndef _LIBCPP_CXX03_LANG
770    inline _LIBCPP_INLINE_VISIBILITY
771    basic_ostringstream(basic_ostringstream&& __rhs);
772
773    // 27.8.2.2 Assign and swap:
774    basic_ostringstream& operator=(basic_ostringstream&& __rhs);
775#endif  // _LIBCPP_CXX03_LANG
776    inline _LIBCPP_INLINE_VISIBILITY
777    void swap(basic_ostringstream& __rhs);
778
779    // 27.8.2.3 Members:
780    inline _LIBCPP_INLINE_VISIBILITY
781    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
782    inline _LIBCPP_INLINE_VISIBILITY
783    string_type str() const;
784    inline _LIBCPP_INLINE_VISIBILITY
785    void str(const string_type& __s);
786};
787
788template <class _CharT, class _Traits, class _Allocator>
789basic_ostringstream<_CharT, _Traits, _Allocator>::basic_ostringstream(ios_base::openmode __wch)
790    : basic_ostream<_CharT, _Traits>(&__sb_),
791      __sb_(__wch | ios_base::out)
792{
793}
794
795template <class _CharT, class _Traits, class _Allocator>
796basic_ostringstream<_CharT, _Traits, _Allocator>::basic_ostringstream(const string_type& __s,
797                                                                      ios_base::openmode __wch)
798    : basic_ostream<_CharT, _Traits>(&__sb_),
799      __sb_(__s, __wch | ios_base::out)
800{
801}
802
803#ifndef _LIBCPP_CXX03_LANG
804
805template <class _CharT, class _Traits, class _Allocator>
806basic_ostringstream<_CharT, _Traits, _Allocator>::basic_ostringstream(basic_ostringstream&& __rhs)
807    : basic_ostream<_CharT, _Traits>(_VSTD::move(__rhs)),
808      __sb_(_VSTD::move(__rhs.__sb_))
809{
810    basic_ostream<_CharT, _Traits>::set_rdbuf(&__sb_);
811}
812
813template <class _CharT, class _Traits, class _Allocator>
814basic_ostringstream<_CharT, _Traits, _Allocator>&
815basic_ostringstream<_CharT, _Traits, _Allocator>::operator=(basic_ostringstream&& __rhs)
816{
817    basic_ostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
818    __sb_ = _VSTD::move(__rhs.__sb_);
819    return *this;
820}
821
822#endif  // _LIBCPP_CXX03_LANG
823
824template <class _CharT, class _Traits, class _Allocator>
825void
826basic_ostringstream<_CharT, _Traits, _Allocator>::swap(basic_ostringstream& __rhs)
827{
828    basic_ostream<char_type, traits_type>::swap(__rhs);
829    __sb_.swap(__rhs.__sb_);
830}
831
832template <class _CharT, class _Traits, class _Allocator>
833inline _LIBCPP_INLINE_VISIBILITY
834void
835swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x,
836     basic_ostringstream<_CharT, _Traits, _Allocator>& __y)
837{
838    __x.swap(__y);
839}
840
841template <class _CharT, class _Traits, class _Allocator>
842basic_stringbuf<_CharT, _Traits, _Allocator>*
843basic_ostringstream<_CharT, _Traits, _Allocator>::rdbuf() const
844{
845    return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(&__sb_);
846}
847
848template <class _CharT, class _Traits, class _Allocator>
849basic_string<_CharT, _Traits, _Allocator>
850basic_ostringstream<_CharT, _Traits, _Allocator>::str() const
851{
852    return __sb_.str();
853}
854
855template <class _CharT, class _Traits, class _Allocator>
856void
857basic_ostringstream<_CharT, _Traits, _Allocator>::str(const string_type& __s)
858{
859    __sb_.str(__s);
860}
861
862// basic_stringstream
863
864template <class _CharT, class _Traits, class _Allocator>
865class _LIBCPP_TEMPLATE_VIS basic_stringstream
866    : public basic_iostream<_CharT, _Traits>
867{
868public:
869    typedef _CharT                         char_type;
870    typedef _Traits                        traits_type;
871    typedef typename traits_type::int_type int_type;
872    typedef typename traits_type::pos_type pos_type;
873    typedef typename traits_type::off_type off_type;
874    typedef _Allocator                     allocator_type;
875
876    typedef basic_string<char_type, traits_type, allocator_type> string_type;
877
878private:
879    basic_stringbuf<char_type, traits_type, allocator_type> __sb_;
880
881public:
882    // 27.8.2.1 Constructors:
883    inline _LIBCPP_INLINE_VISIBILITY
884    explicit basic_stringstream(ios_base::openmode __wch = ios_base::in | ios_base::out);
885    inline _LIBCPP_INLINE_VISIBILITY
886    explicit basic_stringstream(const string_type& __s,
887                                ios_base::openmode __wch = ios_base::in | ios_base::out);
888#ifndef _LIBCPP_CXX03_LANG
889    inline _LIBCPP_INLINE_VISIBILITY
890    basic_stringstream(basic_stringstream&& __rhs);
891
892    // 27.8.2.2 Assign and swap:
893    basic_stringstream& operator=(basic_stringstream&& __rhs);
894#endif  // _LIBCPP_CXX03_LANG
895    inline _LIBCPP_INLINE_VISIBILITY
896    void swap(basic_stringstream& __rhs);
897
898    // 27.8.2.3 Members:
899    inline _LIBCPP_INLINE_VISIBILITY
900    basic_stringbuf<char_type, traits_type, allocator_type>* rdbuf() const;
901    inline _LIBCPP_INLINE_VISIBILITY
902    string_type str() const;
903    inline _LIBCPP_INLINE_VISIBILITY
904    void str(const string_type& __s);
905};
906
907template <class _CharT, class _Traits, class _Allocator>
908basic_stringstream<_CharT, _Traits, _Allocator>::basic_stringstream(ios_base::openmode __wch)
909    : basic_iostream<_CharT, _Traits>(&__sb_),
910      __sb_(__wch)
911{
912}
913
914template <class _CharT, class _Traits, class _Allocator>
915basic_stringstream<_CharT, _Traits, _Allocator>::basic_stringstream(const string_type& __s,
916                                                                    ios_base::openmode __wch)
917    : basic_iostream<_CharT, _Traits>(&__sb_),
918      __sb_(__s, __wch)
919{
920}
921
922#ifndef _LIBCPP_CXX03_LANG
923
924template <class _CharT, class _Traits, class _Allocator>
925basic_stringstream<_CharT, _Traits, _Allocator>::basic_stringstream(basic_stringstream&& __rhs)
926    : basic_iostream<_CharT, _Traits>(_VSTD::move(__rhs)),
927      __sb_(_VSTD::move(__rhs.__sb_))
928{
929    basic_istream<_CharT, _Traits>::set_rdbuf(&__sb_);
930}
931
932template <class _CharT, class _Traits, class _Allocator>
933basic_stringstream<_CharT, _Traits, _Allocator>&
934basic_stringstream<_CharT, _Traits, _Allocator>::operator=(basic_stringstream&& __rhs)
935{
936    basic_iostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
937    __sb_ = _VSTD::move(__rhs.__sb_);
938    return *this;
939}
940
941#endif  // _LIBCPP_CXX03_LANG
942
943template <class _CharT, class _Traits, class _Allocator>
944void
945basic_stringstream<_CharT, _Traits, _Allocator>::swap(basic_stringstream& __rhs)
946{
947    basic_iostream<char_type, traits_type>::swap(__rhs);
948    __sb_.swap(__rhs.__sb_);
949}
950
951template <class _CharT, class _Traits, class _Allocator>
952inline _LIBCPP_INLINE_VISIBILITY
953void
954swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,
955     basic_stringstream<_CharT, _Traits, _Allocator>& __y)
956{
957    __x.swap(__y);
958}
959
960template <class _CharT, class _Traits, class _Allocator>
961basic_stringbuf<_CharT, _Traits, _Allocator>*
962basic_stringstream<_CharT, _Traits, _Allocator>::rdbuf() const
963{
964    return const_cast<basic_stringbuf<char_type, traits_type, allocator_type>*>(&__sb_);
965}
966
967template <class _CharT, class _Traits, class _Allocator>
968basic_string<_CharT, _Traits, _Allocator>
969basic_stringstream<_CharT, _Traits, _Allocator>::str() const
970{
971    return __sb_.str();
972}
973
974template <class _CharT, class _Traits, class _Allocator>
975void
976basic_stringstream<_CharT, _Traits, _Allocator>::str(const string_type& __s)
977{
978    __sb_.str(__s);
979}
980
981_LIBCPP_END_NAMESPACE_STD
982
983_LIBCPP_POP_MACROS
984
985#endif  // _LIBCPP_SSTREAM
986