/project/jni/stlport/src/stdio_streambuf.h
https://github.com/aichunyu/FFPlayer · C Header · 101 lines · 44 code · 18 blank · 39 comment · 0 complexity · fd0cb74e353f1e361de550c7e30a32c6 MD5 · raw file
- /*
- * Copyright (c) 1999
- * Silicon Graphics Computer Systems, Inc.
- *
- * Copyright (c) 1999
- * Boris Fomitchev
- *
- * This material is provided "as is", with absolutely no warranty expressed
- * or implied. Any use is at your own risk.
- *
- * Permission to use or copy this software for any purpose is hereby granted
- * without fee, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- */
- // This header is an extension. It defines two streambufs:
- // stdio_istreambuf, a read-only streambuf synchronized with a C stdio
- // FILE object, and stdio_ostreambuf, a write-only streambuf
- // synchronized with a C stdio FILE object. Note that neither
- // stdio_istreambuf nor stdio_ostreambuf is a template; both classes
- // are derived from basic_streambuf<char, char_traits<char> >.
- // Note: the imbue() member function is a no-op. In particular, these
- // classes assume that codecvt<char, char, mbstate_t> is always an identity
- // transformation. This is true of the default locale, and of all locales
- // defined for the C I/O library. If you need to use a locale where
- // the codecvt<char, char, mbstate_t> facet performs a nontrivial
- // conversion, then you should use basic_filebuf<> instead of stdio_istreambuf
- // or stdio_ostreambuf. (If you don't understand what any of this means,
- // then it's not a feature you need to worry about. Locales where
- // codecvt<char, char, mbstate_t> does something nontrivial are a rare
- // corner case.)
- #ifndef _STLP_STDIO_STREAMBUF
- #define _STLP_STDIO_STREAMBUF
- #include <streambuf>
- #include <cstdio> // For FILE.
- _STLP_BEGIN_NAMESPACE
- _STLP_MOVE_TO_PRIV_NAMESPACE
- // Base class for features common to stdio_istreambuf and stdio_ostreambuf
- class stdio_streambuf_base :
- public basic_streambuf<char, char_traits<char> > /* FILE_basic_streambuf */ {
- public: // Constructor, destructor.
- // The argument may not be null. It must be an open file pointer.
- stdio_streambuf_base(FILE*);
- // The destructor flushes the stream, but does not close it.
- ~stdio_streambuf_base();
- protected: // Virtual functions from basic_streambuf.
- streambuf* setbuf(char*, streamsize);
- pos_type seekoff(off_type, ios_base::seekdir,
- ios_base::openmode
- = ios_base::in | ios_base::out);
- pos_type seekpos(pos_type,
- ios_base::openmode
- = ios_base::in | ios_base::out);
- int sync();
- protected:
- FILE* _M_file;
- };
- class stdio_istreambuf : public stdio_streambuf_base {
- public: // Constructor, destructor.
- stdio_istreambuf(FILE* __f) : stdio_streambuf_base(__f) {}
- ~stdio_istreambuf();
- protected: // Virtual functions from basic_streambuf.
- streamsize showmanyc();
- int_type underflow();
- int_type uflow();
- virtual int_type pbackfail(int_type c = traits_type::eof());
- };
- class stdio_ostreambuf : public stdio_streambuf_base {
- public: // Constructor, destructor.
- stdio_ostreambuf(FILE* __f) : stdio_streambuf_base(__f) {}
- ~stdio_ostreambuf();
- protected: // Virtual functions from basic_streambuf.
- streamsize showmanyc();
- int_type overflow(int_type c = traits_type::eof());
- };
- _STLP_MOVE_TO_STD_NAMESPACE
- _STLP_END_NAMESPACE
- #endif /* _STLP_STDIO_STREAMBUF */
- // Local Variables:
- // mode:C++
- // End: