29 #ifndef _STDIO_SYNC_FILEBUF_H 30 #define _STDIO_SYNC_FILEBUF_H 1 32 #pragma GCC system_header 39 #ifdef _GLIBCXX_USE_WCHAR_T 43 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
45 _GLIBCXX_BEGIN_NAMESPACE_VERSION
55 template<
typename _CharT,
typename _Traits = std::
char_traits<_CharT> >
62 typedef typename traits_type::int_type
int_type;
63 typedef typename traits_type::pos_type
pos_type;
64 typedef typename traits_type::off_type
off_type;
70 std::__c_file* _M_file;
79 : _M_file(__f), _M_unget_buf(traits_type::eof())
82 #if __cplusplus >= 201103L 85 _M_file(__fb._M_file), _M_unget_buf(__fb._M_unget_buf)
87 __fb._M_file =
nullptr;
88 __fb._M_unget_buf = traits_type::eof();
94 __streambuf_type::operator=(__fb);
95 _M_file = std::__exchange(__fb._M_file,
nullptr);
96 _M_unget_buf = std::__exchange(__fb._M_unget_buf, traits_type::eof());
103 __streambuf_type::swap(__fb);
104 std::swap(_M_file, __fb._M_file);
105 std::swap(_M_unget_buf, __fb._M_unget_buf);
117 file() {
return this->_M_file; }
124 syncungetc(int_type __c);
127 syncputc(int_type __c);
133 return this->syncungetc(__c);
140 _M_unget_buf = this->syncgetc();
148 const int_type __eof = traits_type::eof();
151 if (traits_type::eq_int_type(__c, __eof))
153 if (!traits_type::eq_int_type(_M_unget_buf, __eof))
154 __ret = this->syncungetc(_M_unget_buf);
159 __ret = this->syncungetc(__c);
162 _M_unget_buf = __eof;
173 if (traits_type::eq_int_type(__c, traits_type::eof()))
175 if (std::fflush(_M_file))
176 __ret = traits_type::eof();
178 __ret = traits_type::not_eof(__c);
181 __ret = this->syncputc(__c);
190 {
return std::fflush(_M_file); }
204 #ifdef _GLIBCXX_USE_LFS 205 if (!fseeko64(_M_file, __off, __whence))
208 if (!fseek(_M_file, __off, __whence))
216 std::ios_base::openmode __mode =
222 inline stdio_sync_filebuf<char>::int_type
223 stdio_sync_filebuf<char>::syncgetc()
224 {
return std::getc(_M_file); }
227 inline stdio_sync_filebuf<char>::int_type
228 stdio_sync_filebuf<char>::syncungetc(int_type __c)
229 {
return std::ungetc(__c, _M_file); }
232 inline stdio_sync_filebuf<char>::int_type
233 stdio_sync_filebuf<char>::syncputc(int_type __c)
234 {
return std::putc(__c, _M_file); }
242 _M_unget_buf = traits_type::to_int_type(__s[__ret - 1]);
244 _M_unget_buf = traits_type::eof();
251 {
return std::fwrite(__s, 1, __n, _M_file); }
253 #ifdef _GLIBCXX_USE_WCHAR_T 255 inline stdio_sync_filebuf<wchar_t>::int_type
256 stdio_sync_filebuf<wchar_t>::syncgetc()
257 {
return std::getwc(_M_file); }
260 inline stdio_sync_filebuf<wchar_t>::int_type
261 stdio_sync_filebuf<wchar_t>::syncungetc(int_type __c)
262 {
return std::ungetwc(__c, _M_file); }
265 inline stdio_sync_filebuf<wchar_t>::int_type
266 stdio_sync_filebuf<wchar_t>::syncputc(int_type __c)
267 {
return std::putwc(__c, _M_file); }
274 const int_type __eof = traits_type::eof();
277 int_type __c = this->syncgetc();
278 if (traits_type::eq_int_type(__c, __eof))
280 __s[__ret] = traits_type::to_char_type(__c);
285 _M_unget_buf = traits_type::to_int_type(__s[__ret - 1]);
287 _M_unget_buf = traits_type::eof();
293 stdio_sync_filebuf<wchar_t>::xsputn(
const wchar_t* __s,
297 const int_type __eof = traits_type::eof();
300 if (traits_type::eq_int_type(this->syncputc(*__s++), __eof))
308 #if _GLIBCXX_EXTERN_TEMPLATE 309 extern template class stdio_sync_filebuf<char>;
310 #ifdef _GLIBCXX_USE_WCHAR_T 311 extern template class stdio_sync_filebuf<wchar_t>;
315 _GLIBCXX_END_NAMESPACE_VERSION
traits_type::int_type int_type
virtual int_type overflow(int_type __c=traits_type::eof())
Consumes data from the buffer; writes to the controlled sequence.
ptrdiff_t streamsize
Integral type for I/O operation counts and buffer sizes.
Provides a layer of compatibility for C.This GNU extension provides extensions for working with stand...
Class representing stream positions.
static const seekdir cur
Request a seek relative to the current position within the sequence.
static const seekdir beg
Request a seek relative to the beginning of the stream.
virtual int_type pbackfail(int_type __c=traits_type::eof())
Tries to back up the input sequence.
traits_type::off_type off_type
traits_type::pos_type pos_type
The actual work of input and output (interface).
long long streamoff
Type used by fpos, char_traits<char>, and char_traits<wchar_t>.
static const openmode out
Open for output. Default for ofstream and fstream.
GNU extensions for public use.
virtual int sync()
Synchronizes the buffer arrays with the controlled sequences.
virtual int_type uflow()
Fetches more data from the controlled sequence.
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
static const openmode in
Open for input. Default for ifstream and fstream.
fpos< mbstate_t > streampos
File position for char streams.
virtual int_type underflow()
Fetches more data from the controlled sequence.