build/stlport/src/stdio_streambuf.h@b8a032363ba2 (annotated)
build/stlport/src/stdio_streambuf.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 1999 |
| michael@0 | 3 | * Silicon Graphics Computer Systems, Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Copyright (c) 1999 |
| michael@0 | 6 | * Boris Fomitchev |
| michael@0 | 7 | * |
| michael@0 | 8 | * This material is provided "as is", with absolutely no warranty expressed |
| michael@0 | 9 | * or implied. Any use is at your own risk. |
| michael@0 | 10 | * |
| michael@0 | 11 | * Permission to use or copy this software for any purpose is hereby granted |
| michael@0 | 12 | * without fee, provided the above notices are retained on all copies. |
| michael@0 | 13 | * Permission to modify the code and to distribute modified code is granted, |
| michael@0 | 14 | * provided the above notices are retained, and a notice that the code was |
| michael@0 | 15 | * modified is included with the above copyright notice. |
| michael@0 | 16 | * |
| michael@0 | 17 | */ |
| michael@0 | 18 | |
| michael@0 | 19 | // This header defines two streambufs: |
| michael@0 | 20 | // stdio_istreambuf, a read-only streambuf synchronized with a C stdio |
| michael@0 | 21 | // FILE object |
| michael@0 | 22 | // stdio_ostreambuf, a write-only streambuf synchronized with a C stdio |
| michael@0 | 23 | // FILE object. |
| michael@0 | 24 | // Note that neither stdio_istreambuf nor stdio_ostreambuf is a template; |
| michael@0 | 25 | // both classes are derived from basic_streambuf<char, char_traits<char> >. |
| michael@0 | 26 | |
| michael@0 | 27 | // Note: the imbue() member function is a no-op. In particular, these |
| michael@0 | 28 | // classes assume that codecvt<char, char, mbstate_t> is always an identity |
| michael@0 | 29 | // transformation. This is true of the default locale, and of all locales |
| michael@0 | 30 | // defined for the C I/O library. If you need to use a locale where |
| michael@0 | 31 | // the codecvt<char, char, mbstate_t> facet performs a nontrivial |
| michael@0 | 32 | // conversion, then you should use basic_filebuf<> instead of stdio_istreambuf |
| michael@0 | 33 | // or stdio_ostreambuf. (If you don't understand what any of this means, |
| michael@0 | 34 | // then it's not a feature you need to worry about. Locales where |
| michael@0 | 35 | // codecvt<char, char, mbstate_t> does something nontrivial are a rare |
| michael@0 | 36 | // corner case.) |
| michael@0 | 37 | |
| michael@0 | 38 | |
| michael@0 | 39 | #ifndef _STLP_STDIO_STREAMBUF |
| michael@0 | 40 | #define _STLP_STDIO_STREAMBUF |
| michael@0 | 41 | |
| michael@0 | 42 | #include <streambuf> |
| michael@0 | 43 | #include <cstdio> // For FILE. |
| michael@0 | 44 | |
| michael@0 | 45 | _STLP_BEGIN_NAMESPACE |
| michael@0 | 46 | _STLP_MOVE_TO_PRIV_NAMESPACE |
| michael@0 | 47 | |
| michael@0 | 48 | // Base class for features common to stdio_istreambuf and stdio_ostreambuf |
| michael@0 | 49 | class stdio_streambuf_base : |
| michael@0 | 50 | public basic_streambuf<char, char_traits<char> > /* FILE_basic_streambuf */ { |
| michael@0 | 51 | public: // Constructor, destructor. |
| michael@0 | 52 | // The argument may not be null. It must be an open file pointer. |
| michael@0 | 53 | stdio_streambuf_base(FILE*); |
| michael@0 | 54 | |
| michael@0 | 55 | // The destructor flushes the stream, but does not close it. |
| michael@0 | 56 | ~stdio_streambuf_base(); |
| michael@0 | 57 | |
| michael@0 | 58 | protected: // Virtual functions from basic_streambuf. |
| michael@0 | 59 | streambuf* setbuf(char*, streamsize); |
| michael@0 | 60 | |
| michael@0 | 61 | pos_type seekoff(off_type, ios_base::seekdir, |
| michael@0 | 62 | ios_base::openmode |
| michael@0 | 63 | = ios_base::in | ios_base::out); |
| michael@0 | 64 | pos_type seekpos(pos_type, |
| michael@0 | 65 | ios_base::openmode |
| michael@0 | 66 | = ios_base::in | ios_base::out); |
| michael@0 | 67 | int sync(); |
| michael@0 | 68 | |
| michael@0 | 69 | protected: |
| michael@0 | 70 | FILE* _M_file; |
| michael@0 | 71 | }; |
| michael@0 | 72 | |
| michael@0 | 73 | class stdio_istreambuf : public stdio_streambuf_base { |
| michael@0 | 74 | public: // Constructor, destructor. |
| michael@0 | 75 | stdio_istreambuf(FILE* __f) : stdio_streambuf_base(__f) {} |
| michael@0 | 76 | ~stdio_istreambuf(); |
| michael@0 | 77 | |
| michael@0 | 78 | protected: // Virtual functions from basic_streambuf. |
| michael@0 | 79 | streamsize showmanyc(); |
| michael@0 | 80 | int_type underflow(); |
| michael@0 | 81 | int_type uflow(); |
| michael@0 | 82 | virtual int_type pbackfail(int_type c = traits_type::eof()); |
| michael@0 | 83 | }; |
| michael@0 | 84 | |
| michael@0 | 85 | class stdio_ostreambuf : public stdio_streambuf_base { |
| michael@0 | 86 | public: // Constructor, destructor. |
| michael@0 | 87 | stdio_ostreambuf(FILE* __f) : stdio_streambuf_base(__f) {} |
| michael@0 | 88 | ~stdio_ostreambuf(); |
| michael@0 | 89 | |
| michael@0 | 90 | protected: // Virtual functions from basic_streambuf. |
| michael@0 | 91 | streamsize showmanyc(); |
| michael@0 | 92 | int_type overflow(int_type c = traits_type::eof()); |
| michael@0 | 93 | }; |
| michael@0 | 94 | |
| michael@0 | 95 | _STLP_MOVE_TO_STD_NAMESPACE |
| michael@0 | 96 | _STLP_END_NAMESPACE |
| michael@0 | 97 | |
| michael@0 | 98 | #endif /* _STLP_STDIO_STREAMBUF */ |
| michael@0 | 99 | |
| michael@0 | 100 | // Local Variables: |
| michael@0 | 101 | // mode:C++ |
| michael@0 | 102 | // End: |
