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2f9f0c732e
git-svn-id: https://unknownworlds.svn.cloudforge.com/ns1@277 67975925-1194-0748-b3d5-c16f83f1a3a1
121 lines
4 KiB
Text
121 lines
4 KiB
Text
/*
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* Copyright (c) 1999
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1999
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* Boris Fomitchev
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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*/
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// This header is an extension. It defines two streambufs:
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// stdio_istreambuf, a read-only streambuf synchronized with a C stdio
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// FILE object, and stdio_ostreambuf, a write-only streambuf
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// synchronized with a C stdio FILE object. Note that neither
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// stdio_istreambuf nor stdio_ostreambuf is a template; both classes
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// are derived from basic_streambuf<char, char_traits<char> >.
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// Note: the imbue() member function is a no-op. In particular, these
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// classes assume that codecvt<char, char, mbstate_t> is always an identity
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// transformation. This is true of the default locale, and of all locales
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// defined for the C I/O library. If you need to use a locale where
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// the codecvt<char, char, mbstate_t> facet performs a nontrivial
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// conversion, then you should use basic_filebuf<> instead of stdio_istreambuf
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// or stdio_ostreambuf. (If you don't understand what any of this means,
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// then it's not a feature you need to worry about. Locales where
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// codecvt<char, char, mbstate_t> does something nontrivial are a rare
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// corner case.)
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#ifndef _STLP_STDIO_STREAMBUF
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#define _STLP_STDIO_STREAMBUF
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#if !defined(STLP_WINCE)
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#include <streambuf> // For basic_streambuf<>
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#include <cstdio> // For FILE.
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# ifndef _STLP_HAS_NO_NAMESPACES
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// This is an extension. It is in namespace SGI, not namespace std
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namespace _SgI {
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# ifdef _STLP_USE_NAMESPACES
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using namespace _STLP_STD;
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// MSVC needs this
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using _STLP_STD::streamsize;
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using _STLP_STD::streambuf;
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using _STLP_STD::basic_streambuf;
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using _STLP_STD::ios_base;
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// using _STLP_STD::ios_base::openmode;
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# endif
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# endif
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// Base class for features common to stdio_istreambuf and stdio_ostreambuf
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class stdio_streambuf_base : public basic_streambuf<char, _STLP_STD::char_traits<char> >
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{
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public: // Constructor, destructor.
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// The argument may not be null. It must be an open file pointer.
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stdio_streambuf_base(FILE*);
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// The destructor flushes the stream, but does not close it.
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~stdio_streambuf_base();
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protected: // Virtual functions from basic_streambuf.
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streambuf* setbuf(char*, streamsize);
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pos_type seekoff(off_type, ios_base::seekdir,
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ios_base::openmode
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= ios_base::in | ios_base::out);
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pos_type seekpos(pos_type,
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ios_base::openmode
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= ios_base::in | ios_base::out);
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int sync();
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protected:
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FILE* _M_file;
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};
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class stdio_istreambuf : public stdio_streambuf_base
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{
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public: // Constructor, destructor.
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stdio_istreambuf(FILE* __f) : stdio_streambuf_base(__f) {}
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~stdio_istreambuf();
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protected: // Virtual functions from basic_streambuf.
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streamsize showmanyc();
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int_type underflow();
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int_type uflow();
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virtual int_type pbackfail(int_type c = traits_type::eof());
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};
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class stdio_ostreambuf : public stdio_streambuf_base
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{
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public: // Constructor, destructor.
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stdio_ostreambuf(FILE* __f) : stdio_streambuf_base(__f) {}
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~stdio_ostreambuf();
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protected: // Virtual functions from basic_streambuf.
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streamsize showmanyc();
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int_type overflow(int_type c = traits_type::eof());
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};
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# ifndef _STLP_HAS_NO_NAMESPACES
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} // Close namespace _SgI.
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# endif
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#endif /* _STLP_STDIO_STREAMBUF */
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#endif /* _STLP_WINCE */
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// Local Variables:
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// mode:C++
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// End:
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