| // Helpers for ostream inserters -*- C++ -*- |
| |
| // Copyright (C) 2007 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // 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. |
| |
| /** @file ostream_insert.h |
| * This is an internal header file, included by other library headers. |
| * You should not attempt to use it directly. |
| */ |
| |
| #ifndef _OSTREAM_INSERT_H |
| #define _OSTREAM_INSERT_H 1 |
| |
| #pragma GCC system_header |
| |
| #include <iosfwd> |
| |
| _GLIBCXX_BEGIN_NAMESPACE(std) |
| |
| 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(...) |
| { __out._M_setstate(__ios_base::badbit); } |
| } |
| return __out; |
| } |
| |
| // Inhibit implicit instantiations for required instantiations, |
| // which are defined via explicit instantiations elsewhere. |
| // NB: This syntax is a GNU extension. |
| #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 |
| |
| #endif /* _OSTREAM_INSERT_H */ |