include/ext/stdio_sync_filebuf.h

50   template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
51     class stdio_sync_filebuf : public std::basic_streambuf<_CharT, _Traits>
63       std::__c_file* const _M_file;
71       stdio_sync_filebuf(std::__c_file* __f)
82       std::__c_file* const
132       virtual std::streamsize
133       xsgetn(char_type* __s, std::streamsize __n);
141 	    if (std::fflush(_M_file))
151       virtual std::streamsize
152       xsputn(const char_type* __s, std::streamsize __n);
156       { return std::fflush(_M_file); }
158       virtual std::streampos
159       seekoff(std::streamoff __off, std::ios_base::seekdir __dir,
160 	      std::ios_base::openmode = std::ios_base::in | std::ios_base::out)
162 	std::streampos __ret(std::streamoff(-1));
164 	if (__dir == std::ios_base::beg)
166 	else if (__dir == std::ios_base::cur)
172 	  __ret = std::streampos(ftello64(_M_file));
175 	  __ret = std::streampos(std::ftell(_M_file));
180       virtual std::streampos
181       seekpos(std::streampos __pos,
182 	      std::ios_base::openmode __mode =
183 	      std::ios_base::in | std::ios_base::out)
184       { return seekoff(std::streamoff(__pos), std::ios_base::beg, __mode); }
190     { return std::getc(_M_file); }
195     { return std::ungetc(__c, _M_file); }
200     { return std::putc(__c, _M_file); }
203     inline std::streamsize
204     stdio_sync_filebuf<char>::xsgetn(char* __s, std::streamsize __n)
206       std::streamsize __ret = std::fread(__s, 1, __n, _M_file);
215     inline std::streamsize
216     stdio_sync_filebuf<char>::xsputn(const char* __s, std::streamsize __n)
217     { return std::fwrite(__s, 1, __n, _M_file); }
223     { return std::getwc(_M_file); }
228     { return std::ungetwc(__c, _M_file); }
233     { return std::putwc(__c, _M_file); }
236     inline std::streamsize
237     stdio_sync_filebuf<wchar_t>::xsgetn(wchar_t* __s, std::streamsize __n)
239       std::streamsize __ret = 0;
258     inline std::streamsize
260 					std::streamsize __n)
262       std::streamsize __ret = 0;