mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-25 06:38:58 +08:00
b2dad0e372
2000-04-21 Benjamin Kosnik <bkoz@redhat.com> * libstdc++-v3: New directory. From-SVN: r33317
122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
// File position object and stream types
|
|
|
|
// Copyright (C) 1997-1999 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 Input/output library
|
|
//
|
|
|
|
#ifndef _CPP_BITS_FPOS_H
|
|
#define _CPP_BITS_FPOS_H 1
|
|
|
|
// Need this here as well as in std_ios because fpos is used in
|
|
// char_traits, and char_traits is used by string, which may or may
|
|
// not have included the std_ios file.
|
|
#include <bits/c++io.h>
|
|
|
|
namespace std {
|
|
|
|
// 27.4.1 Types
|
|
|
|
// 27.4.3 Template class fpos
|
|
template<typename _StateT>
|
|
class fpos
|
|
{
|
|
public:
|
|
|
|
// Types:
|
|
typedef _StateT __state_type;
|
|
|
|
__state_type
|
|
state() const { return _M_st; }
|
|
|
|
void
|
|
state(__state_type __st) { _M_st = __st; }
|
|
|
|
// NB: The standard defines only the implicit copy ctor and the
|
|
// previous two members. The rest is a "conforming extension".
|
|
fpos(): _M_st(__state_type()), _M_pos(streamoff()) { }
|
|
|
|
fpos(streamoff __pos, __state_type __st)
|
|
: _M_st(__st), _M_pos(__pos) { }
|
|
|
|
fpos(streamoff __pos)
|
|
: _M_st(), _M_pos(__pos) { }
|
|
|
|
operator streamoff() const { return _M_pos; }
|
|
|
|
fpos&
|
|
operator+=(streamoff __off) { _M_pos += __off; return *this; }
|
|
|
|
fpos&
|
|
operator-=(streamoff __off) { _M_pos -= __off; return *this; }
|
|
|
|
bool
|
|
operator==(const fpos& __pos2) const { return _M_pos == __pos2._M_pos; }
|
|
|
|
bool
|
|
operator!=(const fpos& __pos2) const { return _M_pos != __pos2._M_pos; }
|
|
|
|
streamoff
|
|
_M_position() const { return _M_pos; }
|
|
|
|
void
|
|
_M_position(streamoff __pos) { _M_pos = __pos; }
|
|
|
|
private:
|
|
__state_type _M_st;
|
|
streamoff _M_pos;
|
|
};
|
|
|
|
template<typename _State>
|
|
inline fpos<_State>
|
|
operator+(const fpos<_State>& __pos, streamoff __off)
|
|
{
|
|
fpos<_State> t(__pos);
|
|
return t += __off;
|
|
}
|
|
|
|
template<typename _State>
|
|
inline fpos<_State>
|
|
operator-(const fpos<_State>& __pos, streamoff __off)
|
|
{
|
|
fpos<_State> t(__pos);
|
|
return t -= __off;
|
|
}
|
|
|
|
template<typename _State>
|
|
inline streamoff
|
|
operator-(const fpos<_State>& __pos1, const fpos<_State>& __pos2)
|
|
{ return __pos1._M_position() - __pos2._M_position(); }
|
|
|
|
} // namespace std
|
|
|
|
#endif /* _CPP_BITS_FPOS_H */
|
|
|
|
|