1 // File position object and stream types
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
31 // ISO C++ 14882: 27 Input/output library
34 #ifndef _CPP_BITS_FPOS_H
35 #define _CPP_BITS_FPOS_H 1
37 #pragma GCC system_header
39 // Need this here as well as in std_ios because fpos is used in
40 // char_traits, and char_traits is used by string, which may or may
41 // not have included the std_ios file.
42 #include <bits/c++io.h>
49 // 27.4.3 Template class fpos
50 template<typename _StateT>
55 typedef _StateT __state_type;
63 state() const { return _M_st; }
66 state(__state_type __st) { _M_st = __st; }
68 // NB: The standard defines only the implicit copy ctor and the
69 // previous two members. The rest is a "conforming extension".
70 fpos(): _M_st(__state_type()), _M_off(streamoff()) { }
72 fpos(streamoff __off, __state_type __st = __state_type())
73 : _M_st(__st), _M_off(__off) { }
75 operator streamoff() const { return _M_off; }
78 operator+=(streamoff __off) { _M_off += __off; return *this; }
81 operator-=(streamoff __off) { _M_off -= __off; return *this; }
84 operator==(const fpos& __pos) const { return _M_off == __pos._M_off; }
87 operator!=(const fpos& __pos) const { return _M_off != __pos._M_off; }
90 _M_position() const { return _M_off; }
93 _M_position(streamoff __off) { _M_off = __off; }
96 template<typename _State>
98 operator+(const fpos<_State>& __pos, streamoff __off)
100 fpos<_State> t(__pos);
104 template<typename _State>
106 operator-(const fpos<_State>& __pos, streamoff __off)
108 fpos<_State> t(__pos);
112 template<typename _State>
114 operator-(const fpos<_State>& __pos1, const fpos<_State>& __pos2)
115 { return __pos1._M_position() - __pos2._M_position(); }
119 #endif /* _CPP_BITS_FPOS_H */