127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
// Helpers for ostream inserters -*- C++ -*-
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// Copyright (C) 2007 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file ostream_insert.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _OSTREAM_INSERT_H
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#define _OSTREAM_INSERT_H 1
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#pragma GCC system_header
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#include <iosfwd>
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_GLIBCXX_BEGIN_NAMESPACE(std)
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template<typename _CharT, typename _Traits>
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inline void
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__ostream_write(basic_ostream<_CharT, _Traits>& __out,
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const _CharT* __s, streamsize __n)
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{
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typedef basic_ostream<_CharT, _Traits> __ostream_type;
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typedef typename __ostream_type::ios_base __ios_base;
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const streamsize __put = __out.rdbuf()->sputn(__s, __n);
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if (__put != __n)
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__out.setstate(__ios_base::badbit);
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}
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template<typename _CharT, typename _Traits>
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inline void
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__ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
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{
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typedef basic_ostream<_CharT, _Traits> __ostream_type;
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typedef typename __ostream_type::ios_base __ios_base;
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const _CharT __c = __out.fill();
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for (; __n > 0; --__n)
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{
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const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
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if (_Traits::eq_int_type(__put, _Traits::eof()))
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{
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__out.setstate(__ios_base::badbit);
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break;
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}
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}
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}
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template<typename _CharT, typename _Traits>
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basic_ostream<_CharT, _Traits>&
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__ostream_insert(basic_ostream<_CharT, _Traits>& __out,
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const _CharT* __s, streamsize __n)
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{
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typedef basic_ostream<_CharT, _Traits> __ostream_type;
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typedef typename __ostream_type::ios_base __ios_base;
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typename __ostream_type::sentry __cerb(__out);
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if (__cerb)
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{
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try
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{
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const streamsize __w = __out.width();
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if (__w > __n)
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{
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const bool __left = ((__out.flags()
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& __ios_base::adjustfield)
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== __ios_base::left);
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if (!__left)
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__ostream_fill(__out, __w - __n);
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if (__out.good())
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__ostream_write(__out, __s, __n);
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if (__left && __out.good())
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__ostream_fill(__out, __w - __n);
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}
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else
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__ostream_write(__out, __s, __n);
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__out.width(0);
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}
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catch(...)
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{ __out._M_setstate(__ios_base::badbit); }
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}
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return __out;
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}
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// Inhibit implicit instantiations for required instantiations,
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// which are defined via explicit instantiations elsewhere.
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// NB: This syntax is a GNU extension.
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#if _GLIBCXX_EXTERN_TEMPLATE
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extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
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#ifdef _GLIBCXX_USE_WCHAR_T
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extern template wostream& __ostream_insert(wostream&, const wchar_t*,
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streamsize);
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#endif
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#endif
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_GLIBCXX_END_NAMESPACE
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#endif /* _OSTREAM_INSERT_H */
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