2 //===------------------------- streambuf ----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_STEAMBUF
12 #define _LIBCPP_STEAMBUF
20 template <class charT, class traits = char_traits<charT> >
25 typedef charT char_type;
26 typedef traits traits_type;
27 typedef typename traits_type::int_type int_type;
28 typedef typename traits_type::pos_type pos_type;
29 typedef typename traits_type::off_type off_type;
31 virtual ~basic_streambuf();
33 // 27.6.2.2.1 locales:
34 locale pubimbue(const locale& loc);
35 locale getloc() const;
37 // 27.6.2.2.2 buffer and positioning:
38 basic_streambuf* pubsetbuf(char_type* s, streamsize n);
39 pos_type pubseekoff(off_type off, ios_base::seekdir way,
40 ios_base::openmode which = ios_base::in | ios_base::out);
41 pos_type pubseekpos(pos_type sp,
42 ios_base::openmode which = ios_base::in | ios_base::out);
46 // 27.6.2.2.3 Get area:
47 streamsize in_avail();
51 streamsize sgetn(char_type* s, streamsize n);
53 // 27.6.2.2.4 Putback:
54 int_type sputbackc(char_type c);
57 // 27.6.2.2.5 Put area:
58 int_type sputc(char_type c);
59 streamsize sputn(const char_type* s, streamsize n);
63 basic_streambuf(const basic_streambuf& rhs);
64 basic_streambuf& operator=(const basic_streambuf& rhs);
65 void swap(basic_streambuf& rhs);
67 // 27.6.2.3.2 Get area:
68 char_type* eback() const;
69 char_type* gptr() const;
70 char_type* egptr() const;
72 void setg(char_type* gbeg, char_type* gnext, char_type* gend);
74 // 27.6.2.3.3 Put area:
75 char_type* pbase() const;
76 char_type* pptr() const;
77 char_type* epptr() const;
79 void setp(char_type* pbeg, char_type* pend);
81 // 27.6.2.4 virtual functions:
82 // 27.6.2.4.1 Locales:
83 virtual void imbue(const locale& loc);
85 // 27.6.2.4.2 Buffer management and positioning:
86 virtual basic_streambuf* setbuf(char_type* s, streamsize n);
87 virtual pos_type seekoff(off_type off, ios_base::seekdir way,
88 ios_base::openmode which = ios_base::in | ios_base::out);
89 virtual pos_type seekpos(pos_type sp,
90 ios_base::openmode which = ios_base::in | ios_base::out);
93 // 27.6.2.4.3 Get area:
94 virtual streamsize showmanyc();
95 virtual streamsize xsgetn(char_type* s, streamsize n);
96 virtual int_type underflow();
97 virtual int_type uflow();
99 // 27.6.2.4.4 Putback:
100 virtual int_type pbackfail(int_type c = traits_type::eof());
102 // 27.6.2.4.5 Put area:
103 virtual streamsize xsputn(const char_type* s, streamsize n);
104 virtual int_type overflow (int_type c = traits_type::eof());
115 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
116 #pragma GCC system_header
119 _LIBCPP_BEGIN_NAMESPACE_STD
121 template <class _CharT, class _Traits>
122 class _LIBCPP_TYPE_VIS_ONLY basic_streambuf
126 typedef _CharT char_type;
127 typedef _Traits traits_type;
128 typedef typename traits_type::int_type int_type;
129 typedef typename traits_type::pos_type pos_type;
130 typedef typename traits_type::off_type off_type;
132 virtual ~basic_streambuf();
134 // 27.6.2.2.1 locales:
135 locale pubimbue(const locale& __loc);
136 locale getloc() const;
138 // 27.6.2.2.2 buffer and positioning:
139 basic_streambuf* pubsetbuf(char_type* __s, streamsize __n);
140 pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
141 ios_base::openmode __which = ios_base::in | ios_base::out);
142 pos_type pubseekpos(pos_type __sp,
143 ios_base::openmode __which = ios_base::in | ios_base::out);
146 // Get and put areas:
147 // 27.6.2.2.3 Get area:
148 streamsize in_avail();
152 streamsize sgetn(char_type* __s, streamsize __n);
154 // 27.6.2.2.4 Putback:
155 int_type sputbackc(char_type __c);
158 // 27.6.2.2.5 Put area:
159 int_type sputc(char_type __c);
160 streamsize sputn(const char_type* __s, streamsize __n);
164 basic_streambuf(const basic_streambuf& __rhs);
165 basic_streambuf& operator=(const basic_streambuf& __rhs);
166 void swap(basic_streambuf& __rhs);
168 // 27.6.2.3.2 Get area:
169 _LIBCPP_ALWAYS_INLINE char_type* eback() const {return __binp_;}
170 _LIBCPP_ALWAYS_INLINE char_type* gptr() const {return __ninp_;}
171 _LIBCPP_ALWAYS_INLINE char_type* egptr() const {return __einp_;}
173 void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend);
175 // 27.6.2.3.3 Put area:
176 _LIBCPP_ALWAYS_INLINE char_type* pbase() const {return __bout_;}
177 _LIBCPP_ALWAYS_INLINE char_type* pptr() const {return __nout_;}
178 _LIBCPP_ALWAYS_INLINE char_type* epptr() const {return __eout_;}
180 void setp(char_type* __pbeg, char_type* __pend);
182 // 27.6.2.4 virtual functions:
183 // 27.6.2.4.1 Locales:
184 virtual void imbue(const locale& __loc);
186 // 27.6.2.4.2 Buffer management and positioning:
187 virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
188 virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
189 ios_base::openmode __which = ios_base::in | ios_base::out);
190 virtual pos_type seekpos(pos_type __sp,
191 ios_base::openmode __which = ios_base::in | ios_base::out);
194 // 27.6.2.4.3 Get area:
195 virtual streamsize showmanyc();
196 virtual streamsize xsgetn(char_type* __s, streamsize __n);
197 virtual int_type underflow();
198 virtual int_type uflow();
200 // 27.6.2.4.4 Putback:
201 virtual int_type pbackfail(int_type __c = traits_type::eof());
203 // 27.6.2.4.5 Put area:
204 virtual streamsize xsputn(const char_type* __s, streamsize __n);
205 virtual int_type overflow(int_type __c = traits_type::eof());
217 template <class _CharT, class _Traits>
218 basic_streambuf<_CharT, _Traits>::~basic_streambuf()
222 template <class _CharT, class _Traits>
223 inline _LIBCPP_INLINE_VISIBILITY
225 basic_streambuf<_CharT, _Traits>::pubimbue(const locale& __loc)
233 template <class _CharT, class _Traits>
234 inline _LIBCPP_INLINE_VISIBILITY
236 basic_streambuf<_CharT, _Traits>::getloc() const
241 template <class _CharT, class _Traits>
242 inline _LIBCPP_INLINE_VISIBILITY
243 basic_streambuf<_CharT, _Traits>*
244 basic_streambuf<_CharT, _Traits>::pubsetbuf(char_type* __s, streamsize __n)
246 return setbuf(__s, __n);
249 template <class _CharT, class _Traits>
250 inline _LIBCPP_INLINE_VISIBILITY
251 typename basic_streambuf<_CharT, _Traits>::pos_type
252 basic_streambuf<_CharT, _Traits>::pubseekoff(off_type __off,
253 ios_base::seekdir __way,
254 ios_base::openmode __which)
256 return seekoff(__off, __way, __which);
259 template <class _CharT, class _Traits>
260 inline _LIBCPP_INLINE_VISIBILITY
261 typename basic_streambuf<_CharT, _Traits>::pos_type
262 basic_streambuf<_CharT, _Traits>::pubseekpos(pos_type __sp,
263 ios_base::openmode __which)
265 return seekpos(__sp, __which);
268 template <class _CharT, class _Traits>
269 inline _LIBCPP_INLINE_VISIBILITY
271 basic_streambuf<_CharT, _Traits>::pubsync()
276 template <class _CharT, class _Traits>
277 inline _LIBCPP_INLINE_VISIBILITY
279 basic_streambuf<_CharT, _Traits>::in_avail()
281 if (__ninp_ < __einp_)
282 return static_cast<streamsize>(__einp_ - __ninp_);
286 template <class _CharT, class _Traits>
287 inline _LIBCPP_INLINE_VISIBILITY
288 typename basic_streambuf<_CharT, _Traits>::int_type
289 basic_streambuf<_CharT, _Traits>::snextc()
291 if (sbumpc() == traits_type::eof())
292 return traits_type::eof();
296 template <class _CharT, class _Traits>
297 inline _LIBCPP_INLINE_VISIBILITY
298 typename basic_streambuf<_CharT, _Traits>::int_type
299 basic_streambuf<_CharT, _Traits>::sbumpc()
301 if (__ninp_ == __einp_)
303 return traits_type::to_int_type(*__ninp_++);
306 template <class _CharT, class _Traits>
307 inline _LIBCPP_INLINE_VISIBILITY
308 typename basic_streambuf<_CharT, _Traits>::int_type
309 basic_streambuf<_CharT, _Traits>::sgetc()
311 if (__ninp_ == __einp_)
313 return traits_type::to_int_type(*__ninp_);
316 template <class _CharT, class _Traits>
317 inline _LIBCPP_INLINE_VISIBILITY
319 basic_streambuf<_CharT, _Traits>::sgetn(char_type* __s, streamsize __n)
321 return xsgetn(__s, __n);
324 template <class _CharT, class _Traits>
325 inline _LIBCPP_INLINE_VISIBILITY
326 typename basic_streambuf<_CharT, _Traits>::int_type
327 basic_streambuf<_CharT, _Traits>::sputbackc(char_type __c)
329 if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1]))
330 return pbackfail(traits_type::to_int_type(__c));
331 return traits_type::to_int_type(*--__ninp_);
334 template <class _CharT, class _Traits>
335 inline _LIBCPP_INLINE_VISIBILITY
336 typename basic_streambuf<_CharT, _Traits>::int_type
337 basic_streambuf<_CharT, _Traits>::sungetc()
339 if (__binp_ == __ninp_)
341 return traits_type::to_int_type(*--__ninp_);
344 template <class _CharT, class _Traits>
345 inline _LIBCPP_INLINE_VISIBILITY
346 typename basic_streambuf<_CharT, _Traits>::int_type
347 basic_streambuf<_CharT, _Traits>::sputc(char_type __c)
349 if (__nout_ == __eout_)
350 return overflow(traits_type::to_int_type(__c));
352 return traits_type::to_int_type(__c);
355 template <class _CharT, class _Traits>
356 inline _LIBCPP_INLINE_VISIBILITY
358 basic_streambuf<_CharT, _Traits>::sputn(const char_type* __s, streamsize __n)
360 return xsputn(__s, __n);
363 template <class _CharT, class _Traits>
364 basic_streambuf<_CharT, _Traits>::basic_streambuf()
374 template <class _CharT, class _Traits>
375 basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
376 : __loc_(__sb.__loc_),
377 __binp_(__sb.__binp_),
378 __ninp_(__sb.__ninp_),
379 __einp_(__sb.__einp_),
380 __bout_(__sb.__bout_),
381 __nout_(__sb.__nout_),
382 __eout_(__sb.__eout_)
386 template <class _CharT, class _Traits>
387 basic_streambuf<_CharT, _Traits>&
388 basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
390 __loc_ = __sb.__loc_;
391 __binp_ = __sb.__binp_;
392 __ninp_ = __sb.__ninp_;
393 __einp_ = __sb.__einp_;
394 __bout_ = __sb.__bout_;
395 __nout_ = __sb.__nout_;
396 __eout_ = __sb.__eout_;
400 template <class _CharT, class _Traits>
402 basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
404 _VSTD::swap(__loc_, __sb.__loc_);
405 _VSTD::swap(__binp_, __sb.__binp_);
406 _VSTD::swap(__ninp_, __sb.__ninp_);
407 _VSTD::swap(__einp_, __sb.__einp_);
408 _VSTD::swap(__bout_, __sb.__bout_);
409 _VSTD::swap(__nout_, __sb.__nout_);
410 _VSTD::swap(__eout_, __sb.__eout_);
413 template <class _CharT, class _Traits>
414 inline _LIBCPP_INLINE_VISIBILITY
416 basic_streambuf<_CharT, _Traits>::gbump(int __n)
421 template <class _CharT, class _Traits>
422 inline _LIBCPP_INLINE_VISIBILITY
424 basic_streambuf<_CharT, _Traits>::setg(char_type* __gbeg, char_type* __gnext,
432 template <class _CharT, class _Traits>
433 inline _LIBCPP_INLINE_VISIBILITY
435 basic_streambuf<_CharT, _Traits>::pbump(int __n)
440 template <class _CharT, class _Traits>
441 inline _LIBCPP_INLINE_VISIBILITY
443 basic_streambuf<_CharT, _Traits>::setp(char_type* __pbeg, char_type* __pend)
445 __bout_ = __nout_ = __pbeg;
449 template <class _CharT, class _Traits>
451 basic_streambuf<_CharT, _Traits>::imbue(const locale&)
455 template <class _CharT, class _Traits>
456 basic_streambuf<_CharT, _Traits>*
457 basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
462 template <class _CharT, class _Traits>
463 typename basic_streambuf<_CharT, _Traits>::pos_type
464 basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
467 return pos_type(off_type(-1));
470 template <class _CharT, class _Traits>
471 typename basic_streambuf<_CharT, _Traits>::pos_type
472 basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
474 return pos_type(off_type(-1));
477 template <class _CharT, class _Traits>
479 basic_streambuf<_CharT, _Traits>::sync()
484 template <class _CharT, class _Traits>
486 basic_streambuf<_CharT, _Traits>::showmanyc()
491 template <class _CharT, class _Traits>
493 basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
495 const int_type __eof = traits_type::eof();
498 for (;__i < __n; ++__i, ++__s)
500 if (__ninp_ < __einp_)
502 else if ((__c = uflow()) != __eof)
503 *__s = traits_type::to_char_type(__c);
510 template <class _CharT, class _Traits>
511 typename basic_streambuf<_CharT, _Traits>::int_type
512 basic_streambuf<_CharT, _Traits>::underflow()
514 return traits_type::eof();
517 template <class _CharT, class _Traits>
518 typename basic_streambuf<_CharT, _Traits>::int_type
519 basic_streambuf<_CharT, _Traits>::uflow()
521 if (underflow() == traits_type::eof())
522 return traits_type::eof();
523 return traits_type::to_int_type(*__ninp_++);
526 template <class _CharT, class _Traits>
527 typename basic_streambuf<_CharT, _Traits>::int_type
528 basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
530 return traits_type::eof();
533 template <class _CharT, class _Traits>
535 basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
538 int_type __eof = traits_type::eof();
541 if (__nout_ >= __eout_)
543 if (overflow(traits_type::to_int_type(*__s)) == __eof)
550 streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
551 traits_type::copy(__nout_, __s, __chunk_size);
552 __nout_ += __chunk_size;
560 template <class _CharT, class _Traits>
561 typename basic_streambuf<_CharT, _Traits>::int_type
562 basic_streambuf<_CharT, _Traits>::overflow(int_type)
564 return traits_type::eof();
567 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_streambuf<char>)
568 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_streambuf<wchar_t>)
570 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_ios<char>)
571 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_ios<wchar_t>)
573 _LIBCPP_END_NAMESPACE_STD
575 #endif // _LIBCPP_STEAMBUF