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/*
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* Portions Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
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*
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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 defines classes basic_filebuf, basic_ifstream,
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// basic_ofstream, and basic_fstream. These classes represent
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// streambufs and streams whose sources or destinations are files.
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#ifndef _STLP_INTERNAL_FSTREAM_H
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#define _STLP_INTERNAL_FSTREAM_H
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#if defined(__sgi) && !defined(__GNUC__) && !defined(_STANDARD_C_PLUS_PLUS)
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# error This header file requires the -LANG:std option
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#endif
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#ifndef _STLP_INTERNAL_STREAMBUF
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# include <stl/_streambuf.h>
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#endif
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#ifndef _STLP_INTERNAL_ISTREAM
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# include <stl/_istream.h>
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#endif
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#ifndef _STLP_INTERNAL_CODECVT_H
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# include <stl/_codecvt.h>
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#endif
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#if !defined (_STLP_USE_UNIX_IO) && !defined(_STLP_USE_WIN32_IO) && \
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!defined (_STLP_USE_UNIX_EMULATION_IO) && !defined (_STLP_USE_STDIO_IO)
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# if defined (_STLP_UNIX) || defined (__CYGWIN__) || defined (__amigaos__) || defined (__EMX__)
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// open/close/read/write
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# define _STLP_USE_UNIX_IO
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# elif defined (_STLP_WIN32) && !defined (__SYMBIAN32__)
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// CreateFile/ReadFile/WriteFile
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# define _STLP_USE_WIN32_IO
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# elif defined (_STLP_WIN16) || defined (_STLP_MAC)
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// _open/_read/_write
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# define _STLP_USE_UNIX_EMULATION_IO
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# else
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// fopen/fread/fwrite
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# define _STLP_USE_STDIO_IO
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# endif /* _STLP_UNIX */
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#endif /* mode selection */
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#if defined (_STLP_USE_WIN32_IO)
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typedef void* _STLP_fd;
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#elif defined (_STLP_USE_UNIX_EMULATION_IO) || defined (_STLP_USE_STDIO_IO) || defined (_STLP_USE_UNIX_IO)
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typedef int _STLP_fd;
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#else
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# error "Configure i/o !"
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#endif
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#if defined(__SYMBIAN32__WSD__)
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size_t& get_fstream_Filebuf_Base_GetPageSize();
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#define _M_page_size get_fstream_Filebuf_Base_GetPageSize()
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#endif //__SYMBIAN32__WSD__
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_STLP_BEGIN_NAMESPACE
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//----------------------------------------------------------------------
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// Class _Filebuf_base, a private base class to factor out the system-
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// dependent code from basic_filebuf<>.
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class _STLP_CLASS_DECLSPEC _Filebuf_base {
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public: // Opening and closing files.
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_STLP_DECLSPEC _Filebuf_base();
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_STLP_DECLSPEC bool _M_open(const char*, ios_base::openmode, long __protection);
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_STLP_DECLSPEC bool _M_open(const char*, ios_base::openmode);
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_STLP_DECLSPEC bool _M_open(int __id, ios_base::openmode = ios_base::__default_mode);
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#if defined (_STLP_USE_WIN32_IO)
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bool _M_open(_STLP_fd __id, ios_base::openmode = ios_base::__default_mode);
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#endif /* _STLP_USE_WIN32_IO */
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_STLP_DECLSPEC bool _M_close();
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public: // Low-level I/O, like Unix read/write
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_STLP_DECLSPEC ptrdiff_t _M_read(char* __buf, ptrdiff_t __n);
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_STLP_DECLSPEC streamoff _M_seek(streamoff __offset, ios_base::seekdir __dir);
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_STLP_DECLSPEC streamoff _M_file_size();
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_STLP_DECLSPEC bool _M_write(char* __buf, ptrdiff_t __n);
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public: // Memory-mapped I/O.
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_STLP_DECLSPEC void* _M_mmap(streamoff __offset, streamoff __len);
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_STLP_DECLSPEC void _M_unmap(void* __mmap_base, streamoff __len);
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public:
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// Returns a value n such that, if pos is the file pointer at the
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// beginning of the range [first, last), pos + n is the file pointer at
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// the end. On many operating systems n == __last - __first.
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// In Unix, writing n characters always bumps the file position by n.
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// In Windows text mode, however, it bumps the file position by n + m,
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// where m is the number of newlines in the range. That's because an
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// internal \n corresponds to an external two-character sequence.
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streamoff _M_get_offset(char* __first, char* __last) {
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#if defined (_STLP_UNIX) || defined (_STLP_MAC)
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return __last - __first;
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#else // defined (_STLP_WIN32) || defined (_STLP_WIN16) || defined (_STLP_DOS) || defined(N_PLAT_NLM)
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return ( (_M_openmode & ios_base::binary) != 0 )
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? (__last - __first)
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: count(__first, __last, '\n') + (__last - __first);
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#endif
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}
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// Returns true if we're in binary mode or if we're using an OS or file
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// system where there is no distinction between text and binary mode.
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bool _M_in_binary_mode() const {
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#if defined (_STLP_UNIX) || defined (_STLP_MAC) || defined(__BEOS__) || defined (__amigaos__) || defined (__SYMBIAN32__)
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return true;
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#elif defined (_STLP_WIN32) || defined (_STLP_WIN16) || defined (_STLP_DOS) || defined (_STLP_VM) || defined (__EMX__) || defined(N_PLAT_NLM)
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return (_M_openmode & ios_base::binary) != 0;
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#else
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# error "Port!"
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#endif
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}
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static void _S_initialize();
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protected: // Static data members.
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# if !defined(__SYMBIAN32__WSD__)
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static size_t _M_page_size;
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#endif //__SYMBIAN32__
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protected: // Data members.
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_STLP_fd _M_file_id;
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#if defined (_STLP_USE_STDIO_IO)
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// for stdio, the whole FILE* is being kept here
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FILE* _M_file;
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#endif
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#if defined (_STLP_USE_WIN32_IO)
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_STLP_fd _M_view_id;
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#endif
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ios_base::openmode _M_openmode ;
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unsigned char _M_is_open ;
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unsigned char _M_should_close ;
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unsigned char _M_regular_file ;
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public :
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#if defined(__SYMBIAN32__) && defined (__EPOC32__)
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/* On Symbian,we can't make this inline. It violates one address rule */
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_STLP_DECLSPEC static size_t __page_size();
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#else
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static size_t _STLP_CALL __page_size() { return _M_page_size; }
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#endif
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int __o_mode() const { return (int)_M_openmode; }
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bool __is_open() const { return (_M_is_open !=0 ); }
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bool __should_close() const { return (_M_should_close != 0); }
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bool __regular_file() const { return (_M_regular_file != 0); }
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_STLP_fd __get_fd() const { return _M_file_id; }
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};
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//----------------------------------------------------------------------
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// Class basic_filebuf<>.
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// Forward declaration of two helper classes.
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template <class _Traits> class _Noconv_input;
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_STLP_TEMPLATE_NULL
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class _Noconv_input<char_traits<char> >;
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template <class _Traits> class _Noconv_output;
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_STLP_TEMPLATE_NULL
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class _Noconv_output< char_traits<char> >;
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// There is a specialized version of underflow, for basic_filebuf<char>,
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// in fstream.cxx.
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template <class _CharT, class _Traits>
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class _Underflow;
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_STLP_TEMPLATE_NULL class _Underflow< char, char_traits<char> >;
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// public:
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// helper class.
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template <class _CharT>
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struct _Filebuf_Tmp_Buf {
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_CharT* _M_ptr;
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_Filebuf_Tmp_Buf(ptrdiff_t __n) : _M_ptr(0) { _M_ptr = new _CharT[__n]; }
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~_Filebuf_Tmp_Buf() { delete[] _M_ptr; }
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};
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template <class _CharT, class _Traits>
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class basic_filebuf : public basic_streambuf<_CharT, _Traits> {
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public: // Types.
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typedef _CharT char_type;
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typedef typename _Traits::int_type int_type;
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typedef typename _Traits::pos_type pos_type;
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typedef typename _Traits::off_type off_type;
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typedef _Traits traits_type;
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typedef typename _Traits::state_type _State_type;
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typedef basic_streambuf<_CharT, _Traits> _Base;
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typedef basic_filebuf<_CharT, _Traits> _Self;
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public: // Constructors, destructor.
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basic_filebuf();
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~basic_filebuf()
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{
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this->close();
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_M_deallocate_buffers();
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}
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public: // Opening and closing files.
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bool is_open() const { return _M_base.__is_open(); }
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_Self* open(const char* __s, ios_base::openmode __m) {
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return _M_base._M_open(__s, __m) ? this : 0;
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}
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#if !defined (_STLP_NO_EXTENSIONS)
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// These two version of open() and file descriptor getter are extensions.
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_Self* open(const char* __s, ios_base::openmode __m,
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long __protection) {
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return _M_base._M_open(__s, __m, __protection) ? this : 0;
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}
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_STLP_fd fd() const { return _M_base.__get_fd(); }
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_Self* open(int __id, ios_base::openmode _Init_mode = ios_base::__default_mode) {
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return this->_M_open(__id, _Init_mode);
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}
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# if defined (_STLP_USE_WIN32_IO)
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_Self* open(_STLP_fd __id, ios_base::openmode _Init_mode = ios_base::__default_mode) {
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return _M_base._M_open(__id, _Init_mode) ? this : 0;
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}
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# endif /* _STLP_USE_WIN32_IO */
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#endif
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_Self* _M_open(int __id, ios_base::openmode _Init_mode = ios_base::__default_mode) {
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return _M_base._M_open(__id, _Init_mode) ? this : 0;
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}
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_Self* close();
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protected: // Virtual functions from basic_streambuf.
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virtual streamsize showmanyc() {
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// Is there any possibility that reads can succeed?
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if (!this->is_open() || _M_in_output_mode || _M_in_error_mode)
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return -1;
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else if (_M_in_putback_mode)
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return this->egptr() - this->gptr();
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else if (_M_constant_width) {
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streamoff __pos = _M_base._M_seek(0, ios_base::cur);
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streamoff __size = _M_base._M_file_size();
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return __pos >= 0 && __size > __pos ? __size - __pos : 0;
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}
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else
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return 0;
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}
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virtual int_type underflow() {
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return _Underflow<_CharT, _Traits>::_M_doit(this);
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}
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virtual int_type pbackfail(int_type __c= traits_type::eof()) {
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const int_type __eof = traits_type::eof();
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// If we aren't already in input mode, pushback is impossible.
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if (!_M_in_input_mode)
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return __eof;
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// We can use the ordinary get buffer if there's enough space, and
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// if it's a buffer that we're allowed to write to.
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if (this->gptr() != this->eback() &&
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(traits_type::eq_int_type(__c, __eof) ||
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traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]) ||
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!_M_mmap_base)) {
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this->gbump(-1);
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if (traits_type::eq_int_type(__c, __eof) ||
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traits_type::eq(traits_type::to_char_type(__c), *this->gptr()))
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return traits_type::to_int_type(*this->gptr());
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}
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else if (!traits_type::eq_int_type(__c, __eof)) {
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// Are we in the putback buffer already?
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_CharT* __pback_end = _M_pback_buf + __STATIC_CAST(int,_S_pback_buf_size);
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if (_M_in_putback_mode) {
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// Do we have more room in the putback buffer?
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if (this->eback() != _M_pback_buf)
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this->setg(this->egptr() - 1, this->egptr() - 1, __pback_end);
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else
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return __eof; // No more room in the buffer, so fail.
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}
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else { // We're not yet in the putback buffer.
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_M_saved_eback = this->eback();
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_M_saved_gptr = this->gptr();
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_M_saved_egptr = this->egptr();
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this->setg(__pback_end - 1, __pback_end - 1, __pback_end);
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_M_in_putback_mode = true;
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}
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}
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else
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return __eof;
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// We have made a putback position available. Assign to it, and return.
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*this->gptr() = traits_type::to_char_type(__c);
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return __c;
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}
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virtual int_type overflow(int_type __c) {
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// Switch to output mode, if necessary.
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if (!_M_in_output_mode)
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if (!_M_switch_to_output_mode())
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return traits_type::eof();
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_CharT* __ibegin = this->_M_int_buf;
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_CharT* __iend = this->pptr();
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this->setp(_M_int_buf, _M_int_buf_EOS - 1);
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// Put __c at the end of the internal buffer.
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if (!traits_type::eq_int_type(__c, traits_type::eof()))
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*__iend++ = _Traits::to_char_type(__c);
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// For variable-width encodings, output may take more than one pass.
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while (__ibegin != __iend) {
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const _CharT* __inext = __ibegin;
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char* __enext = _M_ext_buf;
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typename _Codecvt::result __status
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= _M_codecvt->out(_M_state, __ibegin, __iend, __inext,
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_M_ext_buf, _M_ext_buf_EOS, __enext);
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if (__status == _Codecvt::noconv) {
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return _Noconv_output<_Traits>::_M_doit(this, __ibegin, __iend)
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? traits_type::not_eof(__c)
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: _M_output_error();
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}
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// For a constant-width encoding we know that the external buffer
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// is large enough, so failure to consume the entire internal buffer
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// or to produce the correct number of external characters, is an error.
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// For a variable-width encoding, however, we require only that we
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// consume at least one internal character
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else if (__status != _Codecvt::error &&
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(((__inext == __iend) &&
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(__enext - _M_ext_buf == _M_width * (__iend - __ibegin))) ||
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(!_M_constant_width && __inext != __ibegin))) {
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// We successfully converted part or all of the internal buffer.
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ptrdiff_t __n = __enext - _M_ext_buf;
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if (_M_write(_M_ext_buf, __n))
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__ibegin += __inext - __ibegin;
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else
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return _M_output_error();
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}
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366 |
else
|
|
367 |
return _M_output_error();
|
|
368 |
}
|
|
369 |
|
|
370 |
return traits_type::not_eof(__c);
|
|
371 |
|
|
372 |
}
|
|
373 |
|
|
374 |
virtual basic_streambuf<_CharT, _Traits>* setbuf(_CharT* __buf, streamsize __n) {
|
|
375 |
|
|
376 |
if (!_M_in_input_mode &&! _M_in_output_mode && !_M_in_error_mode &&
|
|
377 |
_M_int_buf == 0) {
|
|
378 |
if (__buf == 0 && __n == 0)
|
|
379 |
_M_allocate_buffers(0, 1);
|
|
380 |
else if (__buf != 0 && __n > 0)
|
|
381 |
_M_allocate_buffers(__buf, __n);
|
|
382 |
}
|
|
383 |
return this;
|
|
384 |
|
|
385 |
}
|
|
386 |
|
|
387 |
virtual pos_type seekoff(off_type __off,
|
|
388 |
ios_base::seekdir __whence,
|
|
389 |
ios_base::openmode /* dummy */) {
|
|
390 |
|
|
391 |
if (this->is_open() &&
|
|
392 |
(__off == 0 || (_M_constant_width && this->_M_base._M_in_binary_mode()))) {
|
|
393 |
|
|
394 |
if (!_M_seek_init(__off != 0 || __whence != ios_base::cur))
|
|
395 |
return pos_type(-1);
|
|
396 |
|
|
397 |
// Seek to beginning or end, regardless of whether we're in input mode.
|
|
398 |
if (__whence == ios_base::beg || __whence == ios_base::end)
|
|
399 |
return _M_seek_return(_M_base._M_seek(_M_width * __off, __whence),
|
|
400 |
_State_type());
|
|
401 |
|
|
402 |
// Seek relative to current position. Complicated if we're in input mode.
|
|
403 |
else if (__whence == ios_base::cur) {
|
|
404 |
if (!_M_in_input_mode)
|
|
405 |
return _M_seek_return(_M_base._M_seek(_M_width * __off, __whence),
|
|
406 |
_State_type());
|
|
407 |
else if (_M_mmap_base != 0) {
|
|
408 |
// __off is relative to gptr(). We need to do a bit of arithmetic
|
|
409 |
// to get an offset relative to the external file pointer.
|
|
410 |
streamoff __adjust = _M_mmap_len - (this->gptr() - (_CharT*) _M_mmap_base);
|
|
411 |
|
|
412 |
// if __off == 0, we do not need to exit input mode and to shift file pointer
|
|
413 |
return __off == 0 ? pos_type(_M_base._M_seek(0, ios_base::cur) - __adjust)
|
|
414 |
: _M_seek_return(_M_base._M_seek(__off - __adjust, ios_base::cur), _State_type());
|
|
415 |
}
|
|
416 |
else if (_M_constant_width) { // Get or set the position.
|
|
417 |
streamoff __iadj = _M_width * (this->gptr() - this->eback());
|
|
418 |
|
|
419 |
// Compensate for offset relative to gptr versus offset relative
|
|
420 |
// to external pointer. For a text-oriented stream, where the
|
|
421 |
// compensation is more than just pointer arithmetic, we may get
|
|
422 |
// but not set the current position.
|
|
423 |
|
|
424 |
if (__iadj <= _M_ext_buf_end - _M_ext_buf) {
|
|
425 |
streamoff __eadj = _M_base._M_get_offset(_M_ext_buf + __STATIC_CAST(ptrdiff_t, __iadj), _M_ext_buf_end);
|
|
426 |
|
|
427 |
return __off == 0 ? pos_type(_M_base._M_seek(0, ios_base::cur) - __eadj)
|
|
428 |
: _M_seek_return(_M_base._M_seek(__off - __eadj, ios_base::cur), _State_type());
|
|
429 |
}
|
|
430 |
} else { // Get the position. Encoding is var width.
|
|
431 |
// Get position in internal buffer.
|
|
432 |
ptrdiff_t __ipos = this->gptr() - this->eback();
|
|
433 |
|
|
434 |
// Get corresponding position in external buffer.
|
|
435 |
_State_type __state = _M_state;
|
|
436 |
int __epos = _M_codecvt->length(__state, _M_ext_buf, _M_ext_buf_end,
|
|
437 |
__ipos);
|
|
438 |
|
|
439 |
if (__epos >= 0) {
|
|
440 |
// Sanity check (expensive): make sure __epos is the right answer.
|
|
441 |
_State_type __tmp_state = _M_state;
|
|
442 |
_Filebuf_Tmp_Buf<_CharT> __buf(__ipos);
|
|
443 |
_CharT* __ibegin = __buf._M_ptr;
|
|
444 |
_CharT* __inext = __ibegin;
|
|
445 |
|
|
446 |
const char* __dummy;
|
|
447 |
typename _Codecvt::result __status
|
|
448 |
= _M_codecvt->in(__tmp_state,
|
|
449 |
_M_ext_buf, _M_ext_buf + __epos, __dummy,
|
|
450 |
__ibegin, __ibegin + __ipos, __inext);
|
|
451 |
if (__status != _Codecvt::error &&
|
|
452 |
(__status == _Codecvt::noconv ||
|
|
453 |
(__inext == __ibegin + __ipos &&
|
|
454 |
equal(this->eback(), this->gptr(), __ibegin, _STLP_PRIV _Eq_traits<traits_type>())))) {
|
|
455 |
// Get the current position (at the end of the external buffer),
|
|
456 |
// then adjust it. Again, it might be a text-oriented stream.
|
|
457 |
streamoff __cur = _M_base._M_seek(0, ios_base::cur);
|
|
458 |
streamoff __adj =
|
|
459 |
_M_base._M_get_offset(_M_ext_buf, _M_ext_buf + __epos) -
|
|
460 |
_M_base._M_get_offset(_M_ext_buf, _M_ext_buf_end);
|
|
461 |
if (__cur != -1 && __cur + __adj >= 0)
|
|
462 |
return __off == 0 ? pos_type(__cur + __adj)
|
|
463 |
: _M_seek_return(__cur + __adj, __state);
|
|
464 |
//return _M_seek_return(__cur + __adj, __state);
|
|
465 |
}
|
|
466 |
// We failed the sanity check here.
|
|
467 |
}
|
|
468 |
}
|
|
469 |
}
|
|
470 |
// Unrecognized value for __whence here.
|
|
471 |
}
|
|
472 |
|
|
473 |
return pos_type(-1);
|
|
474 |
|
|
475 |
}
|
|
476 |
|
|
477 |
virtual pos_type seekpos(pos_type __pos,
|
|
478 |
ios_base::openmode /* dummy */) {
|
|
479 |
|
|
480 |
if (this->is_open()) {
|
|
481 |
if (!_M_seek_init(true))
|
|
482 |
return pos_type(-1);
|
|
483 |
|
|
484 |
streamoff __off = off_type(__pos);
|
|
485 |
if (__off != -1 && _M_base._M_seek(__off, ios_base::beg) != -1) {
|
|
486 |
_M_state = __pos.state();
|
|
487 |
return _M_seek_return(__off, __pos.state());
|
|
488 |
}
|
|
489 |
}
|
|
490 |
|
|
491 |
return pos_type(-1);
|
|
492 |
|
|
493 |
}
|
|
494 |
|
|
495 |
virtual int sync() {
|
|
496 |
|
|
497 |
if (_M_in_output_mode)
|
|
498 |
return traits_type::eq_int_type(this->overflow(traits_type::eof()),
|
|
499 |
traits_type::eof()) ? -1 : 0;
|
|
500 |
return 0;
|
|
501 |
|
|
502 |
}
|
|
503 |
|
|
504 |
virtual void imbue(const locale& __loc) {
|
|
505 |
|
|
506 |
if (!_M_in_input_mode && !_M_in_output_mode && !_M_in_error_mode) {
|
|
507 |
this->_M_setup_codecvt(__loc);
|
|
508 |
}
|
|
509 |
|
|
510 |
}
|
|
511 |
|
|
512 |
|
|
513 |
private: // Helper functions.
|
|
514 |
|
|
515 |
// Precondition: we are currently in putback input mode. Effect:
|
|
516 |
// switches back to ordinary input mode.
|
|
517 |
void _M_exit_putback_mode() {
|
|
518 |
this->setg(_M_saved_eback, _M_saved_gptr, _M_saved_egptr);
|
|
519 |
_M_in_putback_mode = false;
|
|
520 |
}
|
|
521 |
bool _M_switch_to_input_mode();
|
|
522 |
void _M_exit_input_mode();
|
|
523 |
bool _M_switch_to_output_mode();
|
|
524 |
|
|
525 |
int_type _M_input_error();
|
|
526 |
int_type _M_underflow_aux();
|
|
527 |
// friend class _Noconv_input<_Traits>;
|
|
528 |
// friend class _Noconv_output<_Traits>;
|
|
529 |
friend class _Underflow<_CharT, _Traits>;
|
|
530 |
|
|
531 |
int_type _M_output_error();
|
|
532 |
bool _M_unshift();
|
|
533 |
|
|
534 |
bool _M_allocate_buffers(_CharT* __buf, streamsize __n);
|
|
535 |
bool _M_allocate_buffers();
|
|
536 |
void _M_deallocate_buffers();
|
|
537 |
|
|
538 |
pos_type _M_seek_return(off_type __off, _State_type __state) {
|
|
539 |
if (__off != -1) {
|
|
540 |
if (_M_in_input_mode)
|
|
541 |
_M_exit_input_mode();
|
|
542 |
_M_in_input_mode = false;
|
|
543 |
_M_in_output_mode = false;
|
|
544 |
_M_in_putback_mode = false;
|
|
545 |
_M_in_error_mode = false;
|
|
546 |
this->setg(0, 0, 0);
|
|
547 |
this->setp(0, 0);
|
|
548 |
}
|
|
549 |
|
|
550 |
pos_type __result(__off);
|
|
551 |
__result.state(__state);
|
|
552 |
return __result;
|
|
553 |
}
|
|
554 |
|
|
555 |
bool _M_seek_init(bool __do_unshift);
|
|
556 |
|
|
557 |
void _M_setup_codecvt(const locale&, bool __on_imbue = true);
|
|
558 |
|
|
559 |
private: // Data members used in all modes.
|
|
560 |
|
|
561 |
_Filebuf_base _M_base;
|
|
562 |
|
|
563 |
private: // Locale-related information.
|
|
564 |
|
|
565 |
unsigned char _M_constant_width;
|
|
566 |
unsigned char _M_always_noconv;
|
|
567 |
|
|
568 |
// private: // Mode flags.
|
|
569 |
unsigned char _M_int_buf_dynamic; // True if internal buffer is heap allocated,
|
|
570 |
// false if it was supplied by the user.
|
|
571 |
unsigned char _M_in_input_mode;
|
|
572 |
unsigned char _M_in_output_mode;
|
|
573 |
unsigned char _M_in_error_mode;
|
|
574 |
unsigned char _M_in_putback_mode;
|
|
575 |
|
|
576 |
// Internal buffer: characters seen by the filebuf's clients.
|
|
577 |
_CharT* _M_int_buf;
|
|
578 |
_CharT* _M_int_buf_EOS;
|
|
579 |
|
|
580 |
// External buffer: characters corresponding to the external file.
|
|
581 |
char* _M_ext_buf;
|
|
582 |
char* _M_ext_buf_EOS;
|
|
583 |
|
|
584 |
// The range [_M_ext_buf, _M_ext_buf_converted) contains the external
|
|
585 |
// characters corresponding to the sequence in the internal buffer. The
|
|
586 |
// range [_M_ext_buf_converted, _M_ext_buf_end) contains characters that
|
|
587 |
// have been read into the external buffer but have not been converted
|
|
588 |
// to an internal sequence.
|
|
589 |
char* _M_ext_buf_converted;
|
|
590 |
char* _M_ext_buf_end;
|
|
591 |
|
|
592 |
// State corresponding to beginning of internal buffer.
|
|
593 |
_State_type _M_state;
|
|
594 |
|
|
595 |
private: // Data members used only in input mode.
|
|
596 |
|
|
597 |
// Similar to _M_state except that it corresponds to
|
|
598 |
// the end of the internal buffer instead of the beginning.
|
|
599 |
_State_type _M_end_state;
|
|
600 |
|
|
601 |
// This is a null pointer unless we are in mmap input mode.
|
|
602 |
void* _M_mmap_base;
|
|
603 |
streamoff _M_mmap_len;
|
|
604 |
|
|
605 |
private: // Data members used only in putback mode.
|
|
606 |
_CharT* _M_saved_eback;
|
|
607 |
_CharT* _M_saved_gptr;
|
|
608 |
_CharT* _M_saved_egptr;
|
|
609 |
|
|
610 |
typedef codecvt<_CharT, char, _State_type> _Codecvt;
|
|
611 |
const _Codecvt* _M_codecvt;
|
|
612 |
|
|
613 |
int _M_width; // Width of the encoding (if constant), else 1
|
|
614 |
int _M_max_width; // Largest possible width of single character.
|
|
615 |
|
|
616 |
|
|
617 |
enum { _S_pback_buf_size = 8 };
|
|
618 |
_CharT _M_pback_buf[_S_pback_buf_size];
|
|
619 |
|
|
620 |
// for _Noconv_output
|
|
621 |
public:
|
|
622 |
bool _M_write(char* __buf, ptrdiff_t __n) {return _M_base._M_write(__buf, __n); }
|
|
623 |
|
|
624 |
public:
|
|
625 |
int_type
|
|
626 |
_M_do_noconv_input() {
|
|
627 |
_M_ext_buf_converted = _M_ext_buf_end;
|
|
628 |
/* this-> */ _Base::setg((char_type*)_M_ext_buf, (char_type*)_M_ext_buf, (char_type*)_M_ext_buf_end);
|
|
629 |
return traits_type::to_int_type(*_M_ext_buf);
|
|
630 |
}
|
|
631 |
};
|
|
632 |
|
|
633 |
#if defined (_STLP_USE_TEMPLATE_EXPORT)
|
|
634 |
_STLP_EXPORT_TEMPLATE_CLASS basic_filebuf<char, char_traits<char> >;
|
|
635 |
# if ! defined (_STLP_NO_WCHAR_T)
|
|
636 |
_STLP_EXPORT_TEMPLATE_CLASS basic_filebuf<wchar_t, char_traits<wchar_t> >;
|
|
637 |
# endif
|
|
638 |
#endif /* _STLP_USE_TEMPLATE_EXPORT */
|
|
639 |
|
|
640 |
//
|
|
641 |
// This class had to be designed very carefully to work
|
|
642 |
// with Visual C++.
|
|
643 |
//
|
|
644 |
template <class _Traits>
|
|
645 |
class _Noconv_output {
|
|
646 |
public:
|
|
647 |
typedef typename _Traits::char_type char_type;
|
|
648 |
static bool _STLP_CALL _M_doit(basic_filebuf<char_type, _Traits >*,
|
|
649 |
char_type*, char_type*)
|
|
650 |
{ return false; }
|
|
651 |
};
|
|
652 |
|
|
653 |
_STLP_TEMPLATE_NULL
|
|
654 |
class _STLP_CLASS_DECLSPEC _Noconv_output< char_traits<char> > {
|
|
655 |
public:
|
|
656 |
static bool _STLP_CALL
|
|
657 |
_M_doit(basic_filebuf<char, char_traits<char> >* __buf,
|
|
658 |
char* __first, char* __last) {
|
|
659 |
ptrdiff_t __n = __last - __first;
|
|
660 |
return (__buf->_M_write(__first, __n));
|
|
661 |
}
|
|
662 |
};
|
|
663 |
|
|
664 |
//----------------------------------------------------------------------
|
|
665 |
// basic_filebuf<> helper functions.
|
|
666 |
|
|
667 |
|
|
668 |
//----------------------------------------
|
|
669 |
// Helper functions for switching between modes.
|
|
670 |
|
|
671 |
//
|
|
672 |
// This class had to be designed very carefully to work
|
|
673 |
// with Visual C++.
|
|
674 |
//
|
|
675 |
template <class _Traits>
|
|
676 |
class _Noconv_input {
|
|
677 |
public:
|
|
678 |
typedef typename _Traits::int_type int_type;
|
|
679 |
typedef typename _Traits::char_type char_type;
|
|
680 |
|
|
681 |
static inline int_type _STLP_CALL
|
|
682 |
_M_doit(basic_filebuf<char_type, _Traits>*)
|
|
683 |
{ return _Traits::eof(); }
|
|
684 |
};
|
|
685 |
|
|
686 |
_STLP_TEMPLATE_NULL
|
|
687 |
class _Noconv_input<char_traits<char> > {
|
|
688 |
public:
|
|
689 |
static inline int _STLP_CALL
|
|
690 |
_M_doit(basic_filebuf<char, char_traits<char> >* __buf) {
|
|
691 |
return __buf->_M_do_noconv_input();
|
|
692 |
}
|
|
693 |
};
|
|
694 |
|
|
695 |
// underflow() may be called for one of two reasons. (1) We've
|
|
696 |
// been going through the special putback buffer, and we need to move back
|
|
697 |
// to the regular internal buffer. (2) We've exhausted the internal buffer,
|
|
698 |
// and we need to replentish it.
|
|
699 |
template <class _CharT, class _Traits>
|
|
700 |
class _Underflow {
|
|
701 |
public:
|
|
702 |
typedef typename _Traits::int_type int_type;
|
|
703 |
typedef _Traits traits_type;
|
|
704 |
|
|
705 |
static int_type _STLP_CALL _M_doit(basic_filebuf<_CharT, _Traits>* __this);
|
|
706 |
};
|
|
707 |
|
|
708 |
|
|
709 |
// Specialization of underflow: if the character type is char, maybe
|
|
710 |
// we can use mmap instead of read.
|
|
711 |
_STLP_TEMPLATE_NULL
|
|
712 |
class _STLP_CLASS_DECLSPEC _Underflow< char, char_traits<char> > {
|
|
713 |
public:
|
|
714 |
typedef char_traits<char>::int_type int_type;
|
|
715 |
typedef char_traits<char> traits_type;
|
|
716 |
_STLP_DECLSPEC static int _STLP_CALL _M_doit(basic_filebuf<char, traits_type >* __this);
|
|
717 |
};
|
|
718 |
|
|
719 |
// There is a specialized version of underflow, for basic_filebuf<char>,
|
|
720 |
// in fstream.cxx.
|
|
721 |
|
|
722 |
template <class _CharT, class _Traits>
|
|
723 |
_STLP_TYPENAME_ON_RETURN_TYPE _Underflow<_CharT, _Traits>::int_type // _STLP_CALL
|
|
724 |
_Underflow<_CharT, _Traits>::_M_doit(basic_filebuf<_CharT, _Traits>* __this) {
|
|
725 |
if (!__this->_M_in_input_mode) {
|
|
726 |
if (!__this->_M_switch_to_input_mode())
|
|
727 |
return traits_type::eof();
|
|
728 |
}
|
|
729 |
else if (__this->_M_in_putback_mode) {
|
|
730 |
__this->_M_exit_putback_mode();
|
|
731 |
if (__this->gptr() != __this->egptr()) {
|
|
732 |
int_type __c = traits_type::to_int_type(*__this->gptr());
|
|
733 |
return __c;
|
|
734 |
}
|
|
735 |
}
|
|
736 |
|
|
737 |
return __this->_M_underflow_aux();
|
|
738 |
}
|
|
739 |
|
|
740 |
#if defined (_STLP_USE_TEMPLATE_EXPORT) && !defined (_STLP_NO_WCHAR_T)
|
|
741 |
_STLP_EXPORT_TEMPLATE_CLASS _Underflow<wchar_t, char_traits<wchar_t> >;
|
|
742 |
#endif
|
|
743 |
|
|
744 |
//----------------------------------------------------------------------
|
|
745 |
// Class basic_ifstream<>
|
|
746 |
|
|
747 |
template <class _CharT, class _Traits>
|
|
748 |
class basic_ifstream : public basic_istream<_CharT, _Traits> {
|
|
749 |
public: // Types
|
|
750 |
typedef _CharT char_type;
|
|
751 |
typedef typename _Traits::int_type int_type;
|
|
752 |
typedef typename _Traits::pos_type pos_type;
|
|
753 |
typedef typename _Traits::off_type off_type;
|
|
754 |
typedef _Traits traits_type;
|
|
755 |
|
|
756 |
typedef basic_ios<_CharT, _Traits> _Basic_ios;
|
|
757 |
typedef basic_istream<_CharT, _Traits> _Base;
|
|
758 |
typedef basic_filebuf<_CharT, _Traits> _Buf;
|
|
759 |
|
|
760 |
public: // Constructors, destructor.
|
|
761 |
|
|
762 |
basic_ifstream() :
|
|
763 |
basic_ios<_CharT, _Traits>(), basic_istream<_CharT, _Traits>(0), _M_buf() {
|
|
764 |
this->init(&_M_buf);
|
|
765 |
}
|
|
766 |
|
|
767 |
explicit basic_ifstream(const char* __s, ios_base::openmode __mod = ios_base::in) :
|
|
768 |
basic_ios<_CharT, _Traits>(), basic_istream<_CharT, _Traits>(0),
|
|
769 |
_M_buf() {
|
|
770 |
this->init(&_M_buf);
|
|
771 |
if (!_M_buf.open(__s, __mod | ios_base::in))
|
|
772 |
this->setstate(ios_base::failbit);
|
|
773 |
}
|
|
774 |
|
|
775 |
#if !defined (_STLP_NO_EXTENSIONS)
|
|
776 |
explicit basic_ifstream(int __id, ios_base::openmode __mod = ios_base::in) :
|
|
777 |
basic_ios<_CharT, _Traits>(), basic_istream<_CharT, _Traits>(0), _M_buf() {
|
|
778 |
this->init(&_M_buf);
|
|
779 |
if (!_M_buf.open(__id, __mod | ios_base::in))
|
|
780 |
this->setstate(ios_base::failbit);
|
|
781 |
}
|
|
782 |
basic_ifstream(const char* __s, ios_base::openmode __m,
|
|
783 |
long __protection) :
|
|
784 |
basic_ios<_CharT, _Traits>(), basic_istream<_CharT, _Traits>(0), _M_buf() {
|
|
785 |
this->init(&_M_buf);
|
|
786 |
if (!_M_buf.open(__s, __m | ios_base::in, __protection))
|
|
787 |
this->setstate(ios_base::failbit);
|
|
788 |
}
|
|
789 |
|
|
790 |
# if defined (_STLP_USE_WIN32_IO)
|
|
791 |
explicit basic_ifstream(_STLP_fd __id, ios_base::openmode __mod = ios_base::in) :
|
|
792 |
basic_ios<_CharT, _Traits>(), basic_istream<_CharT, _Traits>(0), _M_buf() {
|
|
793 |
this->init(&_M_buf);
|
|
794 |
if (!_M_buf.open(__id, __mod | ios_base::in))
|
|
795 |
this->setstate(ios_base::failbit);
|
|
796 |
}
|
|
797 |
# endif /* _STLP_USE_WIN32_IO */
|
|
798 |
#endif
|
|
799 |
|
|
800 |
~basic_ifstream() {}
|
|
801 |
|
|
802 |
public: // File and buffer operations.
|
|
803 |
basic_filebuf<_CharT, _Traits>* rdbuf() const
|
|
804 |
{ return __CONST_CAST(_Buf*,&_M_buf); }
|
|
805 |
|
|
806 |
bool is_open() {
|
|
807 |
return this->rdbuf()->is_open();
|
|
808 |
}
|
|
809 |
|
|
810 |
void open(const char* __s, ios_base::openmode __mod = ios_base::in) {
|
|
811 |
if (!this->rdbuf()->open(__s, __mod | ios_base::in))
|
|
812 |
this->setstate(ios_base::failbit);
|
|
813 |
}
|
|
814 |
|
|
815 |
void close() {
|
|
816 |
if (!this->rdbuf()->close())
|
|
817 |
this->setstate(ios_base::failbit);
|
|
818 |
}
|
|
819 |
|
|
820 |
private:
|
|
821 |
basic_filebuf<_CharT, _Traits> _M_buf;
|
|
822 |
};
|
|
823 |
|
|
824 |
|
|
825 |
//----------------------------------------------------------------------
|
|
826 |
// Class basic_ofstream<>
|
|
827 |
|
|
828 |
template <class _CharT, class _Traits>
|
|
829 |
class basic_ofstream : public basic_ostream<_CharT, _Traits> {
|
|
830 |
public: // Types
|
|
831 |
typedef _CharT char_type;
|
|
832 |
typedef typename _Traits::int_type int_type;
|
|
833 |
typedef typename _Traits::pos_type pos_type;
|
|
834 |
typedef typename _Traits::off_type off_type;
|
|
835 |
typedef _Traits traits_type;
|
|
836 |
|
|
837 |
typedef basic_ios<_CharT, _Traits> _Basic_ios;
|
|
838 |
typedef basic_ostream<_CharT, _Traits> _Base;
|
|
839 |
typedef basic_filebuf<_CharT, _Traits> _Buf;
|
|
840 |
|
|
841 |
public: // Constructors, destructor.
|
|
842 |
basic_ofstream() :
|
|
843 |
basic_ios<_CharT, _Traits>(),
|
|
844 |
basic_ostream<_CharT, _Traits>(0), _M_buf() {
|
|
845 |
this->init(&_M_buf);
|
|
846 |
}
|
|
847 |
explicit basic_ofstream(const char* __s, ios_base::openmode __mod = ios_base::out)
|
|
848 |
: basic_ios<_CharT, _Traits>(), basic_ostream<_CharT, _Traits>(0), _M_buf() {
|
|
849 |
this->init(&_M_buf);
|
|
850 |
if (!_M_buf.open(__s, __mod | ios_base::out))
|
|
851 |
this->setstate(ios_base::failbit);
|
|
852 |
}
|
|
853 |
|
|
854 |
#if !defined (_STLP_NO_EXTENSIONS)
|
|
855 |
explicit basic_ofstream(int __id, ios_base::openmode __mod = ios_base::out)
|
|
856 |
: basic_ios<_CharT, _Traits>(), basic_ostream<_CharT, _Traits>(0),
|
|
857 |
_M_buf() {
|
|
858 |
this->init(&_M_buf);
|
|
859 |
if (!_M_buf.open(__id, __mod | ios_base::out))
|
|
860 |
this->setstate(ios_base::failbit);
|
|
861 |
}
|
|
862 |
basic_ofstream(const char* __s, ios_base::openmode __m, long __protection) :
|
|
863 |
basic_ios<_CharT, _Traits>(), basic_ostream<_CharT, _Traits>(0), _M_buf() {
|
|
864 |
this->init(&_M_buf);
|
|
865 |
if (!_M_buf.open(__s, __m | ios_base::out, __protection))
|
|
866 |
this->setstate(ios_base::failbit);
|
|
867 |
}
|
|
868 |
# if defined (_STLP_USE_WIN32_IO)
|
|
869 |
explicit basic_ofstream(_STLP_fd __id, ios_base::openmode __mod = ios_base::out)
|
|
870 |
: basic_ios<_CharT, _Traits>(), basic_ostream<_CharT, _Traits>(0),
|
|
871 |
_M_buf() {
|
|
872 |
this->init(&_M_buf);
|
|
873 |
if (!_M_buf.open(__id, __mod | ios_base::out))
|
|
874 |
this->setstate(ios_base::failbit);
|
|
875 |
}
|
|
876 |
# endif /* _STLP_USE_WIN32_IO */
|
|
877 |
#endif
|
|
878 |
|
|
879 |
~basic_ofstream() {}
|
|
880 |
|
|
881 |
public: // File and buffer operations.
|
|
882 |
basic_filebuf<_CharT, _Traits>* rdbuf() const
|
|
883 |
{ return __CONST_CAST(_Buf*,&_M_buf); }
|
|
884 |
|
|
885 |
bool is_open() {
|
|
886 |
return this->rdbuf()->is_open();
|
|
887 |
}
|
|
888 |
|
|
889 |
void open(const char* __s, ios_base::openmode __mod= ios_base::out) {
|
|
890 |
if (!this->rdbuf()->open(__s, __mod | ios_base::out))
|
|
891 |
this->setstate(ios_base::failbit);
|
|
892 |
}
|
|
893 |
|
|
894 |
void close() {
|
|
895 |
if (!this->rdbuf()->close())
|
|
896 |
this->setstate(ios_base::failbit);
|
|
897 |
}
|
|
898 |
|
|
899 |
private:
|
|
900 |
basic_filebuf<_CharT, _Traits> _M_buf;
|
|
901 |
};
|
|
902 |
|
|
903 |
|
|
904 |
//----------------------------------------------------------------------
|
|
905 |
// Class basic_fstream<>
|
|
906 |
|
|
907 |
template <class _CharT, class _Traits>
|
|
908 |
class basic_fstream : public basic_iostream<_CharT, _Traits> {
|
|
909 |
public: // Types
|
|
910 |
typedef _CharT char_type;
|
|
911 |
typedef typename _Traits::int_type int_type;
|
|
912 |
typedef typename _Traits::pos_type pos_type;
|
|
913 |
typedef typename _Traits::off_type off_type;
|
|
914 |
typedef _Traits traits_type;
|
|
915 |
|
|
916 |
typedef basic_ios<_CharT, _Traits> _Basic_ios;
|
|
917 |
typedef basic_iostream<_CharT, _Traits> _Base;
|
|
918 |
typedef basic_filebuf<_CharT, _Traits> _Buf;
|
|
919 |
|
|
920 |
public: // Constructors, destructor.
|
|
921 |
|
|
922 |
basic_fstream()
|
|
923 |
: basic_ios<_CharT, _Traits>(), basic_iostream<_CharT, _Traits>(0), _M_buf() {
|
|
924 |
this->init(&_M_buf);
|
|
925 |
}
|
|
926 |
|
|
927 |
explicit basic_fstream(const char* __s,
|
|
928 |
ios_base::openmode __mod = ios_base::in | ios_base::out) :
|
|
929 |
basic_ios<_CharT, _Traits>(), basic_iostream<_CharT, _Traits>(0), _M_buf() {
|
|
930 |
this->init(&_M_buf);
|
|
931 |
if (!_M_buf.open(__s, __mod))
|
|
932 |
this->setstate(ios_base::failbit);
|
|
933 |
}
|
|
934 |
|
|
935 |
#if !defined (_STLP_NO_EXTENSIONS)
|
|
936 |
explicit basic_fstream(int __id,
|
|
937 |
ios_base::openmode __mod = ios_base::in | ios_base::out) :
|
|
938 |
basic_ios<_CharT, _Traits>(), basic_iostream<_CharT, _Traits>(0), _M_buf() {
|
|
939 |
this->init(&_M_buf);
|
|
940 |
if (!_M_buf.open(__id, __mod))
|
|
941 |
this->setstate(ios_base::failbit);
|
|
942 |
}
|
|
943 |
basic_fstream(const char* __s, ios_base::openmode __m, long __protection) :
|
|
944 |
basic_ios<_CharT, _Traits>(), basic_iostream<_CharT, _Traits>(0), _M_buf() {
|
|
945 |
this->init(&_M_buf);
|
|
946 |
if (!_M_buf.open(__s, __m, __protection))
|
|
947 |
this->setstate(ios_base::failbit);
|
|
948 |
}
|
|
949 |
# if defined (_STLP_USE_WIN32_IO)
|
|
950 |
explicit basic_fstream(_STLP_fd __id,
|
|
951 |
ios_base::openmode __mod = ios_base::in | ios_base::out) :
|
|
952 |
basic_ios<_CharT, _Traits>(), basic_iostream<_CharT, _Traits>(0), _M_buf() {
|
|
953 |
this->init(&_M_buf);
|
|
954 |
if (!_M_buf.open(__id, __mod))
|
|
955 |
this->setstate(ios_base::failbit);
|
|
956 |
}
|
|
957 |
# endif /* _STLP_USE_WIN32_IO */
|
|
958 |
#endif
|
|
959 |
~basic_fstream() {}
|
|
960 |
|
|
961 |
public: // File and buffer operations.
|
|
962 |
|
|
963 |
basic_filebuf<_CharT, _Traits>* rdbuf() const
|
|
964 |
{ return __CONST_CAST(_Buf*,&_M_buf); }
|
|
965 |
|
|
966 |
bool is_open() {
|
|
967 |
return this->rdbuf()->is_open();
|
|
968 |
}
|
|
969 |
|
|
970 |
void open(const char* __s,
|
|
971 |
ios_base::openmode __mod =
|
|
972 |
ios_base::in | ios_base::out) {
|
|
973 |
if (!this->rdbuf()->open(__s, __mod))
|
|
974 |
this->setstate(ios_base::failbit);
|
|
975 |
}
|
|
976 |
|
|
977 |
void close() {
|
|
978 |
if (!this->rdbuf()->close())
|
|
979 |
this->setstate(ios_base::failbit);
|
|
980 |
}
|
|
981 |
|
|
982 |
private:
|
|
983 |
basic_filebuf<_CharT, _Traits> _M_buf;
|
|
984 |
|
|
985 |
#if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310)
|
|
986 |
typedef basic_fstream<_CharT, _Traits> _Self;
|
|
987 |
//explicitely defined as private to avoid warnings:
|
|
988 |
basic_fstream(_Self const&);
|
|
989 |
_Self& operator = (_Self const&);
|
|
990 |
#endif
|
|
991 |
};
|
|
992 |
|
|
993 |
_STLP_END_NAMESPACE
|
|
994 |
|
|
995 |
#if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
|
|
996 |
# include <stl/_fstream.c>
|
|
997 |
#endif
|
|
998 |
|
|
999 |
_STLP_BEGIN_NAMESPACE
|
|
1000 |
|
|
1001 |
#if defined (_STLP_USE_TEMPLATE_EXPORT)
|
|
1002 |
_STLP_EXPORT_TEMPLATE_CLASS basic_ifstream<char, char_traits<char> >;
|
|
1003 |
_STLP_EXPORT_TEMPLATE_CLASS basic_ofstream<char, char_traits<char> >;
|
|
1004 |
_STLP_EXPORT_TEMPLATE_CLASS basic_fstream<char, char_traits<char> >;
|
|
1005 |
# if ! defined (_STLP_NO_WCHAR_T)
|
|
1006 |
_STLP_EXPORT_TEMPLATE_CLASS basic_ifstream<wchar_t, char_traits<wchar_t> >;
|
|
1007 |
_STLP_EXPORT_TEMPLATE_CLASS basic_ofstream<wchar_t, char_traits<wchar_t> >;
|
|
1008 |
_STLP_EXPORT_TEMPLATE_CLASS basic_fstream<wchar_t, char_traits<wchar_t> >;
|
|
1009 |
# endif
|
|
1010 |
#endif /* _STLP_USE_TEMPLATE_EXPORT */
|
|
1011 |
|
|
1012 |
_STLP_END_NAMESPACE
|
|
1013 |
|
|
1014 |
#endif /* _STLP_FSTREAM */
|
|
1015 |
|
|
1016 |
|
|
1017 |
// Local Variables:
|
|
1018 |
// mode:C++
|
|
1019 |
// End:
|