1 // Helpers for ostream inserters -*- C++ -*- 2 3 // Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file bits/ostream_insert.h 26 * This is an internal header file, included by other library headers. 27 * Do not attempt to use it directly. @headername{ostream} 28 */ 29 30 #ifndef _OSTREAM_INSERT_H 31 #define _OSTREAM_INSERT_H 1 32 33 #pragma GCC system_header 34 35 #include <iosfwd> 36 #include <bits/cxxabi_forced.h> 37 38 namespace std _GLIBCXX_VISIBILITY(default) 39 { 40 _GLIBCXX_BEGIN_NAMESPACE_VERSION 41 42 template<typename _CharT, typename _Traits> 43 inline void 44 __ostream_write(basic_ostream<_CharT, _Traits>& __out, 45 const _CharT* __s, streamsize __n) 46 { 47 typedef basic_ostream<_CharT, _Traits> __ostream_type; 48 typedef typename __ostream_type::ios_base __ios_base; 49 50 const streamsize __put = __out.rdbuf()->sputn(__s, __n); 51 if (__put != __n) 52 __out.setstate(__ios_base::badbit); 53 } 54 55 template<typename _CharT, typename _Traits> 56 inline void 57 __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n) 58 { 59 typedef basic_ostream<_CharT, _Traits> __ostream_type; 60 typedef typename __ostream_type::ios_base __ios_base; 61 62 const _CharT __c = __out.fill(); 63 for (; __n > 0; --__n) 64 { 65 const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c); 66 if (_Traits::eq_int_type(__put, _Traits::eof())) 67 { 68 __out.setstate(__ios_base::badbit); 69 break; 70 } 71 } 72 } 73 74 template<typename _CharT, typename _Traits> 75 basic_ostream<_CharT, _Traits>& 76 __ostream_insert(basic_ostream<_CharT, _Traits>& __out, 77 const _CharT* __s, streamsize __n) 78 { 79 typedef basic_ostream<_CharT, _Traits> __ostream_type; 80 typedef typename __ostream_type::ios_base __ios_base; 81 82 typename __ostream_type::sentry __cerb(__out); 83 if (__cerb) 84 { 85 __try 86 { 87 const streamsize __w = __out.width(); 88 if (__w > __n) 89 { 90 const bool __left = ((__out.flags() 91 & __ios_base::adjustfield) 92 == __ios_base::left); 93 if (!__left) 94 __ostream_fill(__out, __w - __n); 95 if (__out.good()) 96 __ostream_write(__out, __s, __n); 97 if (__left && __out.good()) 98 __ostream_fill(__out, __w - __n); 99 } 100 else 101 __ostream_write(__out, __s, __n); 102 __out.width(0); 103 } 104 __catch(__cxxabiv1::__forced_unwind&) 105 { 106 __out._M_setstate(__ios_base::badbit); 107 __throw_exception_again; 108 } 109 __catch(...) 110 { __out._M_setstate(__ios_base::badbit); } 111 } 112 return __out; 113 } 114 115 // Inhibit implicit instantiations for required instantiations, 116 // which are defined via explicit instantiations elsewhere. 117 #if _GLIBCXX_EXTERN_TEMPLATE 118 extern template ostream& __ostream_insert(ostream&, const char*, streamsize); 119 120 #ifdef _GLIBCXX_USE_WCHAR_T 121 extern template wostream& __ostream_insert(wostream&, const wchar_t*, 122 streamsize); 123 #endif 124 #endif 125 126 _GLIBCXX_END_NAMESPACE_VERSION 127 } // namespace std 128 129 #endif /* _OSTREAM_INSERT_H */ 130