+++ /dev/null
-// Stream buffer classes -*- C++ -*-
-
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
-// Free Software Foundation, Inc.
-//
-// This file is part of the GNU ISO C++ Library. This library is free
-// software; you can redistribute it and/or modify it under the
-// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
-// any later version.
-
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
-
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
-
-//
-// ISO C++ 14882: 27.5 Stream buffers
-//
-
-/** @file streambuf
- * This is a Standard C++ Library header. You should @c #include this header
- * in your programs, rather than any of the "st[dl]_*.h" implementation files.
- */
-
-#ifndef _CPP_STREAMBUF
-#define _CPP_STREAMBUF 1
-
-#pragma GCC system_header
-
-#include <bits/c++config.h>
-#include <iosfwd>
-#include <cstdio> // For SEEK_SET, SEEK_CUR, SEEK_END
-#include <bits/localefwd.h>
-#include <bits/ios_base.h>
-
-namespace std
-{
- template<typename _CharT, typename _Traits>
- streamsize
- __copy_streambufs(basic_ios<_CharT, _Traits>& _ios,
- basic_streambuf<_CharT, _Traits>* __sbin,
- basic_streambuf<_CharT, _Traits>* __sbout);
-
- // 27.5.2 Template class basic_streambuf<_CharT, _Traits>
- template<typename _CharT, typename _Traits>
- class basic_streambuf
- {
- public:
- // Types:
- typedef _CharT char_type;
- typedef _Traits traits_type;
- typedef typename traits_type::int_type int_type;
- typedef typename traits_type::pos_type pos_type;
- typedef typename traits_type::off_type off_type;
-
- // Non-standard Types:
- typedef ctype<char_type> __ctype_type;
- typedef basic_streambuf<char_type, traits_type> __streambuf_type;
- typedef typename traits_type::state_type __state_type;
-
- friend class basic_ios<char_type, traits_type>;
- friend class basic_istream<char_type, traits_type>;
- friend class basic_ostream<char_type, traits_type>;
- friend class istreambuf_iterator<char_type, traits_type>;
- friend class ostreambuf_iterator<char_type, traits_type>;
-
- friend streamsize
- __copy_streambufs<>(basic_ios<char_type, traits_type>& __ios,
- __streambuf_type* __sbin,__streambuf_type* __sbout);
-
- protected:
- // Pointer to the beginning of internally-allocated
- // space. Filebuf manually allocates/deallocates this, whereas
- // stringstreams attempt to use the built-in intelligence of the
- // string class. If you are managing memory, set this. If not,
- // leave it NULL.
- char_type* _M_buf;
-
- // Actual size of allocated internal buffer, in bytes.
- size_t _M_buf_size;
-
- // Optimal or preferred size of internal buffer, in bytes.
- size_t _M_buf_size_opt;
-
- // True iff _M_in_* and _M_out_* buffers should always point to
- // the same place. True for fstreams, false for sstreams.
- bool _M_buf_unified;
-
- // This is based on _IO_FILE, just reordered to be more
- // consistent, and is intended to be the most minimal abstraction
- // for an internal buffer.
- // get == input == read
- // put == output == write
- char_type* _M_in_beg; // Start of get area.
- char_type* _M_in_cur; // Current read area.
- char_type* _M_in_end; // End of get area.
- char_type* _M_out_beg; // Start of put area.
- char_type* _M_out_cur; // Current put area.
- char_type* _M_out_end; // End of put area.
-
- // Place to stash in || out || in | out settings for current streambuf.
- ios_base::openmode _M_mode;
-
- // Current locale setting.
- locale _M_buf_locale;
-
- // True iff locale is initialized.
- bool _M_buf_locale_init;
-
- // Necessary bits for putback buffer management. Only used in
- // the basic_filebuf class, as necessary for the standard
- // requirements. The only basic_streambuf member function that
- // needs access to these data members is in_avail...
- // NB: pbacks of over one character are not currently supported.
- static const size_t _S_pback_size = 1;
- char_type _M_pback[_S_pback_size];
- char_type* _M_pback_cur_save;
- char_type* _M_pback_end_save;
- bool _M_pback_init;
-
- // Yet unused.
- fpos<__state_type> _M_pos;
-
- // Initializes pback buffers, and moves normal buffers to safety.
- // Assumptions:
- // _M_in_cur has already been moved back
- void
- _M_pback_create()
- {
- if (!_M_pback_init)
- {
- size_t __dist = _M_in_end - _M_in_cur;
- size_t __len = min(_S_pback_size, __dist);
- traits_type::copy(_M_pback, _M_in_cur, __len);
- _M_pback_cur_save = _M_in_cur;
- _M_pback_end_save = _M_in_end;
- this->setg(_M_pback, _M_pback, _M_pback + __len);
- _M_pback_init = true;
- }
- }
-
- // Deactivates pback buffer contents, and restores normal buffer.
- // Assumptions:
- // The pback buffer has only moved forward.
- void
- _M_pback_destroy()
- {
- if (_M_pback_init)
- {
- // Length _M_in_cur moved in the pback buffer.
- size_t __off_cur = _M_in_cur - _M_pback;
-
- // For in | out buffers, the end can be pushed back...
- size_t __off_end = 0;
- size_t __pback_len = _M_in_end - _M_pback;
- size_t __save_len = _M_pback_end_save - _M_buf;
- if (__pback_len > __save_len)
- __off_end = __pback_len - __save_len;
-
- this->setg(_M_buf, _M_pback_cur_save + __off_cur,
- _M_pback_end_save + __off_end);
- _M_pback_cur_save = NULL;
- _M_pback_end_save = NULL;
- _M_pback_init = false;
- }
- }
-
- // Correctly sets the _M_in_cur pointer, and bumps the
- // _M_out_cur pointer as well if necessary.
- void
- _M_in_cur_move(off_type __n) // argument needs to be +-
- {
- bool __testout = _M_out_cur;
- _M_in_cur += __n;
- if (__testout && _M_buf_unified)
- _M_out_cur += __n;
- }
-
- // Correctly sets the _M_out_cur pointer, and bumps the
- // appropriate _M_*_end pointers as well. Necessary for the
- // un-tied stringbufs, in in|out mode.
- // Invariant:
- // __n + _M_out_[cur, end] <= _M_buf + _M_buf_size
- // Assuming all _M_*_[beg, cur, end] pointers are operating on
- // the same range:
- // _M_buf <= _M_*_ <= _M_buf + _M_buf_size
- void
- _M_out_cur_move(off_type __n) // argument needs to be +-
- {
- bool __testin = _M_in_cur;
-
- _M_out_cur += __n;
- if (__testin && _M_buf_unified)
- _M_in_cur += __n;
- if (_M_out_cur > _M_out_end)
- {
- _M_out_end = _M_out_cur;
- // NB: in | out buffers drag the _M_in_end pointer along...
- if (__testin)
- _M_in_end += __n;
- }
- }
-
- // Return the size of the output buffer. This depends on the
- // buffer in use: allocated buffers have a stored size in
- // _M_buf_size and setbuf() buffers don't.
- off_type
- _M_out_buf_size()
- {
- off_type __ret = 0;
- if (_M_out_cur)
- {
- // Using allocated buffer.
- if (_M_out_beg == _M_buf)
- __ret = _M_out_beg + _M_buf_size - _M_out_cur;
- // Using non-allocated buffer.
- else
- __ret = _M_out_end - _M_out_cur;
- }
- return __ret;
- }
-
- public:
- virtual
- ~basic_streambuf()
- {
- _M_buf_unified = false;
- _M_buf_size = 0;
- _M_buf_size_opt = 0;
- _M_mode = ios_base::openmode(0);
- }
-
- // Locales:
- locale
- pubimbue(const locale &__loc)
- {
- locale __tmp(this->getloc());
- this->imbue(__loc);
- return __tmp;
- }
-
- locale
- getloc() const
- { return _M_buf_locale; }
-
- // Buffer and positioning:
- __streambuf_type*
- pubsetbuf(char_type* __s, streamsize __n)
- { return this->setbuf(__s, __n); }
-
- pos_type
- pubseekoff(off_type __off, ios_base::seekdir __way,
- ios_base::openmode __mode = ios_base::in | ios_base::out)
- { return this->seekoff(__off, __way, __mode); }
-
- pos_type
- pubseekpos(pos_type __sp,
- ios_base::openmode __mode = ios_base::in | ios_base::out)
- { return this->seekpos(__sp, __mode); }
-
- int
- pubsync() { return this->sync(); }
-
- // Get and put areas:
- // Get area:
- streamsize
- in_avail()
- {
- streamsize __ret;
- if (_M_in_cur && _M_in_cur < _M_in_end)
- {
- if (_M_pback_init)
- {
- size_t __save_len = _M_pback_end_save - _M_pback_cur_save;
- size_t __pback_len = _M_in_cur - _M_pback;
- __ret = __save_len - __pback_len;
- }
- else
- __ret = this->egptr() - this->gptr();
- }
- else
- __ret = this->showmanyc();
- return __ret;
- }
-
- int_type
- snextc()
- {
- int_type __eof = traits_type::eof();
- return (traits_type::eq_int_type(this->sbumpc(), __eof)
- ? __eof : this->sgetc());
- }
-
- int_type
- sbumpc();
-
- int_type
- sgetc()
- {
- int_type __ret;
- if (_M_in_cur && _M_in_cur < _M_in_end)
- __ret = traits_type::to_int_type(*(this->gptr()));
- else
- __ret = this->underflow();
- return __ret;
- }
-
- streamsize
- sgetn(char_type* __s, streamsize __n)
- { return this->xsgetn(__s, __n); }
-
- // Putback:
- int_type
- sputbackc(char_type __c);
-
- int_type
- sungetc();
-
- // Put area:
- int_type
- sputc(char_type __c);
-
- streamsize
- sputn(const char_type* __s, streamsize __n)
- { return this->xsputn(__s, __n); }
-
- protected:
- basic_streambuf()
- : _M_buf(NULL), _M_buf_size(0), _M_buf_size_opt(BUFSIZ),
- _M_buf_unified(false), _M_in_beg(0), _M_in_cur(0), _M_in_end(0),
- _M_out_beg(0), _M_out_cur(0), _M_out_end(0),
- _M_mode(ios_base::openmode(0)), _M_buf_locale(locale()),
- _M_pback_cur_save(0), _M_pback_end_save(0),
- _M_pback_init(false)
- { }
-
- // Get area:
- char_type*
- eback() const { return _M_in_beg; }
-
- char_type*
- gptr() const { return _M_in_cur; }
-
- char_type*
- egptr() const { return _M_in_end; }
-
- void
- gbump(int __n) { _M_in_cur += __n; }
-
- void
- setg(char_type* __gbeg, char_type* __gnext, char_type* __gend)
- {
- _M_in_beg = __gbeg;
- _M_in_cur = __gnext;
- _M_in_end = __gend;
- if (!(_M_mode & ios_base::in) && __gbeg && __gnext && __gend)
- _M_mode = _M_mode | ios_base::in;
- }
-
- // Put area:
- char_type*
- pbase() const { return _M_out_beg; }
-
- char_type*
- pptr() const { return _M_out_cur; }
-
- char_type*
- epptr() const { return _M_out_end; }
-
- void
- pbump(int __n) { _M_out_cur += __n; }
-
- void
- setp(char_type* __pbeg, char_type* __pend)
- {
- _M_out_beg = _M_out_cur = __pbeg;
- _M_out_end = __pend;
- if (!(_M_mode & ios_base::out) && __pbeg && __pend)
- _M_mode = _M_mode | ios_base::out;
- }
-
- // Virtual functions:
- // Locales:
- virtual void
- imbue(const locale& __loc)
- {
- if (_M_buf_locale != __loc)
- _M_buf_locale = __loc;
- }
-
- // Buffer management and positioning:
- virtual basic_streambuf<char_type,_Traits>*
- setbuf(char_type*, streamsize)
- { return this; }
-
- virtual pos_type
- seekoff(off_type, ios_base::seekdir,
- ios_base::openmode /*__mode*/ = ios_base::in | ios_base::out)
- { return pos_type(off_type(-1)); }
-
- virtual pos_type
- seekpos(pos_type,
- ios_base::openmode /*__mode*/ = ios_base::in | ios_base::out)
- { return pos_type(off_type(-1)); }
-
- virtual int
- sync() { return 0; }
-
- // Get area:
- virtual streamsize
- showmanyc() { return 0; }
-
- virtual streamsize
- xsgetn(char_type* __s, streamsize __n);
-
- virtual int_type
- underflow()
- { return traits_type::eof(); }
-
- virtual int_type
- uflow()
- {
- int_type __ret = traits_type::eof();
- bool __testeof = traits_type::eq_int_type(this->underflow(), __ret);
- bool __testpending = _M_in_cur && _M_in_cur < _M_in_end;
- if (!__testeof && __testpending)
- {
- __ret = traits_type::to_int_type(*_M_in_cur);
- ++_M_in_cur;
- if (_M_buf_unified && _M_mode & ios_base::out)
- ++_M_out_cur;
- }
- return __ret;
- }
-
- // Putback:
- virtual int_type
- pbackfail(int_type /* __c */ = traits_type::eof())
- { return traits_type::eof(); }
-
- // Put area:
- virtual streamsize
- xsputn(const char_type* __s, streamsize __n);
-
- virtual int_type
- overflow(int_type /* __c */ = traits_type::eof())
- { return traits_type::eof(); }
-
-#ifdef _GLIBCPP_DEPRECATED
- public:
- void
- stossc()
- {
- if (_M_in_cur < _M_in_end)
- ++_M_in_cur;
- else
- this->uflow();
- }
-#endif
-
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // Side effect of DR 50.
- private:
- basic_streambuf(const __streambuf_type&) { };
-
- __streambuf_type&
- operator=(const __streambuf_type&) { return *this; };
-#endif
- };
-} // namespace std
-
-#ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
-# define export
-#endif
-#ifdef _GLIBCPP_FULLY_COMPLIANT_HEADERS
-#include <bits/streambuf.tcc>
-#endif
-
-#endif
projects / msp430-gcc.git / blobdiff