130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
// Helpers for ostream inserters -*- C++ -*-
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// Copyright (C) 2007-2020 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 3, 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/ostream_insert.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{ostream}
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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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#include <bits/cxxabi_forced.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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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(__cxxabiv1::__forced_unwind&)
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{
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__out._M_setstate(__ios_base::badbit);
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__throw_exception_again;
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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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#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_VERSION
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} // namespace std
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#endif /* _OSTREAM_INSERT_H */
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