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
120 #include <__undef_macros>
122 _LIBCPP_BEGIN_NAMESPACE_STD
124 template <class _CharT, class _Traits>
125 class _LIBCPP_TEMPLATE_VIS basic_streambuf
129 typedef _CharT char_type;
130 typedef _Traits traits_type;
131 typedef typename traits_type::int_type int_type;
132 typedef typename traits_type::pos_type pos_type;
133 typedef typename traits_type::off_type off_type;
135 virtual ~basic_streambuf();
137 // 27.6.2.2.1 locales:
138 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
139 locale pubimbue(const locale& __loc) {
146 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
147 locale getloc() const { return __loc_; }
149 // 27.6.2.2.2 buffer and positioning:
150 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
151 basic_streambuf* pubsetbuf(char_type* __s, streamsize __n)
152 { return setbuf(__s, __n); }
154 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
155 pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
156 ios_base::openmode __which = ios_base::in | ios_base::out)
157 { return seekoff(__off, __way, __which); }
159 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
160 pos_type pubseekpos(pos_type __sp,
161 ios_base::openmode __which = ios_base::in | ios_base::out)
162 { return seekpos(__sp, __which); }
164 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
165 int pubsync() { return sync(); }
167 // Get and put areas:
168 // 27.6.2.2.3 Get area:
169 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
170 streamsize in_avail() {
171 if (__ninp_ < __einp_)
172 return static_cast<streamsize>(__einp_ - __ninp_);
176 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
178 if (sbumpc() == traits_type::eof())
179 return traits_type::eof();
183 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
185 if (__ninp_ == __einp_)
187 return traits_type::to_int_type(*__ninp_++);
190 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
192 if (__ninp_ == __einp_)
194 return traits_type::to_int_type(*__ninp_);
197 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
198 streamsize sgetn(char_type* __s, streamsize __n)
199 { return xsgetn(__s, __n); }
201 // 27.6.2.2.4 Putback:
202 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
203 int_type sputbackc(char_type __c) {
204 if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1]))
205 return pbackfail(traits_type::to_int_type(__c));
206 return traits_type::to_int_type(*--__ninp_);
209 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
211 if (__binp_ == __ninp_)
213 return traits_type::to_int_type(*--__ninp_);
216 // 27.6.2.2.5 Put area:
217 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
218 int_type sputc(char_type __c) {
219 if (__nout_ == __eout_)
220 return overflow(traits_type::to_int_type(__c));
222 return traits_type::to_int_type(__c);
225 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
226 streamsize sputn(const char_type* __s, streamsize __n)
227 { return xsputn(__s, __n); }
231 basic_streambuf(const basic_streambuf& __rhs);
232 basic_streambuf& operator=(const basic_streambuf& __rhs);
233 void swap(basic_streambuf& __rhs);
235 // 27.6.2.3.2 Get area:
236 _LIBCPP_ALWAYS_INLINE char_type* eback() const {return __binp_;}
237 _LIBCPP_ALWAYS_INLINE char_type* gptr() const {return __ninp_;}
238 _LIBCPP_ALWAYS_INLINE char_type* egptr() const {return __einp_;}
240 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
241 void gbump(int __n) { __ninp_ += __n; }
243 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
244 void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
250 // 27.6.2.3.3 Put area:
251 _LIBCPP_ALWAYS_INLINE char_type* pbase() const {return __bout_;}
252 _LIBCPP_ALWAYS_INLINE char_type* pptr() const {return __nout_;}
253 _LIBCPP_ALWAYS_INLINE char_type* epptr() const {return __eout_;}
255 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
256 void pbump(int __n) { __nout_ += __n; }
258 _LIBCPP_ALWAYS_INLINE
259 void __pbump(streamsize __n) { __nout_ += __n; }
261 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
262 void setp(char_type* __pbeg, char_type* __pend) {
263 __bout_ = __nout_ = __pbeg;
267 // 27.6.2.4 virtual functions:
268 // 27.6.2.4.1 Locales:
269 virtual void imbue(const locale& __loc);
271 // 27.6.2.4.2 Buffer management and positioning:
272 virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
273 virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
274 ios_base::openmode __which = ios_base::in | ios_base::out);
275 virtual pos_type seekpos(pos_type __sp,
276 ios_base::openmode __which = ios_base::in | ios_base::out);
279 // 27.6.2.4.3 Get area:
280 virtual streamsize showmanyc();
281 virtual streamsize xsgetn(char_type* __s, streamsize __n);
282 virtual int_type underflow();
283 virtual int_type uflow();
285 // 27.6.2.4.4 Putback:
286 virtual int_type pbackfail(int_type __c = traits_type::eof());
288 // 27.6.2.4.5 Put area:
289 virtual streamsize xsputn(const char_type* __s, streamsize __n);
290 virtual int_type overflow(int_type __c = traits_type::eof());
302 template <class _CharT, class _Traits>
303 basic_streambuf<_CharT, _Traits>::~basic_streambuf()
307 template <class _CharT, class _Traits>
308 basic_streambuf<_CharT, _Traits>::basic_streambuf()
318 template <class _CharT, class _Traits>
319 basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
320 : __loc_(__sb.__loc_),
321 __binp_(__sb.__binp_),
322 __ninp_(__sb.__ninp_),
323 __einp_(__sb.__einp_),
324 __bout_(__sb.__bout_),
325 __nout_(__sb.__nout_),
326 __eout_(__sb.__eout_)
330 template <class _CharT, class _Traits>
331 basic_streambuf<_CharT, _Traits>&
332 basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
334 __loc_ = __sb.__loc_;
335 __binp_ = __sb.__binp_;
336 __ninp_ = __sb.__ninp_;
337 __einp_ = __sb.__einp_;
338 __bout_ = __sb.__bout_;
339 __nout_ = __sb.__nout_;
340 __eout_ = __sb.__eout_;
344 template <class _CharT, class _Traits>
346 basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
348 _VSTD::swap(__loc_, __sb.__loc_);
349 _VSTD::swap(__binp_, __sb.__binp_);
350 _VSTD::swap(__ninp_, __sb.__ninp_);
351 _VSTD::swap(__einp_, __sb.__einp_);
352 _VSTD::swap(__bout_, __sb.__bout_);
353 _VSTD::swap(__nout_, __sb.__nout_);
354 _VSTD::swap(__eout_, __sb.__eout_);
357 template <class _CharT, class _Traits>
359 basic_streambuf<_CharT, _Traits>::imbue(const locale&)
363 template <class _CharT, class _Traits>
364 basic_streambuf<_CharT, _Traits>*
365 basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
370 template <class _CharT, class _Traits>
371 typename basic_streambuf<_CharT, _Traits>::pos_type
372 basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
375 return pos_type(off_type(-1));
378 template <class _CharT, class _Traits>
379 typename basic_streambuf<_CharT, _Traits>::pos_type
380 basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
382 return pos_type(off_type(-1));
385 template <class _CharT, class _Traits>
387 basic_streambuf<_CharT, _Traits>::sync()
392 template <class _CharT, class _Traits>
394 basic_streambuf<_CharT, _Traits>::showmanyc()
399 template <class _CharT, class _Traits>
401 basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
403 const int_type __eof = traits_type::eof();
408 if (__ninp_ < __einp_)
410 const streamsize __len = _VSTD::min(static_cast<streamsize>(INT_MAX),
411 _VSTD::min(__einp_ - __ninp_, __n - __i));
412 traits_type::copy(__s, __ninp_, __len);
417 else if ((__c = uflow()) != __eof)
419 *__s = traits_type::to_char_type(__c);
429 template <class _CharT, class _Traits>
430 typename basic_streambuf<_CharT, _Traits>::int_type
431 basic_streambuf<_CharT, _Traits>::underflow()
433 return traits_type::eof();
436 template <class _CharT, class _Traits>
437 typename basic_streambuf<_CharT, _Traits>::int_type
438 basic_streambuf<_CharT, _Traits>::uflow()
440 if (underflow() == traits_type::eof())
441 return traits_type::eof();
442 return traits_type::to_int_type(*__ninp_++);
445 template <class _CharT, class _Traits>
446 typename basic_streambuf<_CharT, _Traits>::int_type
447 basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
449 return traits_type::eof();
452 template <class _CharT, class _Traits>
454 basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
457 int_type __eof = traits_type::eof();
460 if (__nout_ >= __eout_)
462 if (overflow(traits_type::to_int_type(*__s)) == __eof)
469 streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
470 traits_type::copy(__nout_, __s, __chunk_size);
471 __nout_ += __chunk_size;
479 template <class _CharT, class _Traits>
480 typename basic_streambuf<_CharT, _Traits>::int_type
481 basic_streambuf<_CharT, _Traits>::overflow(int_type)
483 return traits_type::eof();
486 #ifndef _LIBCPP_AVAILABILITY_NO_STREAMS_EXTERN_TEMPLATE
487 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>)
488 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>)
490 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<char>)
491 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<wchar_t>)
494 _LIBCPP_END_NAMESPACE_STD
498 #endif // _LIBCPP_STEAMBUF