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Diffstat (limited to 'libstdc++-v3/include/bits/fpos.h')
-rw-r--r-- | libstdc++-v3/include/bits/fpos.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/fpos.h b/libstdc++-v3/include/bits/fpos.h new file mode 100644 index 00000000000..27792b04a84 --- /dev/null +++ b/libstdc++-v3/include/bits/fpos.h @@ -0,0 +1,121 @@ +// 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 */ + + |