ostream_insert.h
Go to the documentation of this file.
// Helpers for ostream inserters -*- C++ -*-
// Copyright (C) 2007-2013 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 3, 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file bits/ostream_insert.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{ostream}
*/
#ifndef _OSTREAM_INSERT_H
#define _OSTREAM_INSERT_H 1
#pragma GCC system_header
#include <iosfwd>
#include <bits/cxxabi_forced.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _CharT, typename _Traits>
inline void
__ostream_write(basic_ostream<_CharT, _Traits>& __out,
const _CharT* __s, streamsize __n)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typedef typename __ostream_type::ios_base __ios_base;
const streamsize __put = __out.rdbuf()->sputn(__s, __n);
if (__put != __n)
__out.setstate(__ios_base::badbit);
}
template<typename _CharT, typename _Traits>
inline void
__ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typedef typename __ostream_type::ios_base __ios_base;
const _CharT __c = __out.fill();
for (; __n > 0; --__n)
{
const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
if (_Traits::eq_int_type(__put, _Traits::eof()))
{
__out.setstate(__ios_base::badbit);
break;
}
}
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
__ostream_insert(basic_ostream<_CharT, _Traits>& __out,
const _CharT* __s, streamsize __n)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typedef typename __ostream_type::ios_base __ios_base;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
__try
{
const streamsize __w = __out.width();
if (__w > __n)
{
const bool __left = ((__out.flags()
& __ios_base::adjustfield)
== __ios_base::left);
if (!__left)
__ostream_fill(__out, __w - __n);
if (__out.good())
__ostream_write(__out, __s, __n);
if (__left && __out.good())
__ostream_fill(__out, __w - __n);
}
else
__ostream_write(__out, __s, __n);
__out.width(0);
}
__catch(__cxxabiv1::__forced_unwind&)
{
__out._M_setstate(__ios_base::badbit);
__throw_exception_again;
}
__catch(...)
{ __out._M_setstate(__ios_base::badbit); }
}
return __out;
}
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE
extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
#ifdef _GLIBCXX_USE_WCHAR_T
extern template wostream& __ostream_insert(wostream&, const wchar_t*,
streamsize);
#endif
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif /* _OSTREAM_INSERT_H */