| 1 | // Helpers for ostream inserters -*- C++ -*-
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| 2 |
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| 3 | // Copyright (C) 2007-2021 Free Software Foundation, Inc.
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| 4 | //
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| 5 | // This file is part of the GNU ISO C++ Library. This library is free
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| 6 | // software; you can redistribute it and/or modify it under the
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| 7 | // terms of the GNU General Public License as published by the
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| 8 | // Free Software Foundation; either version 3, or (at your option)
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| 9 | // any later version.
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| 10 |
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| 11 | // This library is distributed in the hope that it will be useful,
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| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | // GNU General Public License for more details.
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| 15 |
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| 16 | // Under Section 7 of GPL version 3, you are granted additional
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| 17 | // permissions described in the GCC Runtime Library Exception, version
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| 18 | // 3.1, as published by the Free Software Foundation.
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| 19 |
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| 20 | // You should have received a copy of the GNU General Public License and
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| 21 | // a copy of the GCC Runtime Library Exception along with this program;
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| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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| 23 | // <http://www.gnu.org/licenses/>.
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| 24 |
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| 25 | /** @file bits/ostream_insert.h
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| 26 | * This is an internal header file, included by other library headers.
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| 27 | * Do not attempt to use it directly. @headername{ostream}
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| 28 | */
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| 29 |
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| 30 | #ifndef _OSTREAM_INSERT_H
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| 31 | #define _OSTREAM_INSERT_H 1
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| 32 |
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| 33 | #pragma GCC system_header
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| 34 |
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| 35 | #include <iosfwd>
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| 36 | #include <bits/cxxabi_forced.h>
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| 37 | #include <bits/exception_defines.h>
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| 38 |
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| 39 | namespace std _GLIBCXX_VISIBILITY(default)
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| 40 | {
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| 41 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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| 42 |
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| 43 | template<typename _CharT, typename _Traits>
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| 44 | inline void
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| 45 | __ostream_write(basic_ostream<_CharT, _Traits>& __out,
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| 46 | const _CharT* __s, streamsize __n)
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| 47 | {
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| 48 | typedef basic_ostream<_CharT, _Traits> __ostream_type;
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| 49 | typedef typename __ostream_type::ios_base __ios_base;
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| 50 |
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| 51 | const streamsize __put = __out.rdbuf()->sputn(__s, __n);
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| 52 | if (__put != __n)
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| 53 | __out.setstate(__ios_base::badbit);
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| 54 | }
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| 55 |
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| 56 | template<typename _CharT, typename _Traits>
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| 57 | inline void
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| 58 | __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
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| 59 | {
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| 60 | typedef basic_ostream<_CharT, _Traits> __ostream_type;
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| 61 | typedef typename __ostream_type::ios_base __ios_base;
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| 62 |
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| 63 | const _CharT __c = __out.fill();
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| 64 | for (; __n > 0; --__n)
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| 65 | {
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| 66 | const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
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| 67 | if (_Traits::eq_int_type(__put, _Traits::eof()))
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| 68 | {
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| 69 | __out.setstate(__ios_base::badbit);
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| 70 | break;
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| 71 | }
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | template<typename _CharT, typename _Traits>
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| 76 | basic_ostream<_CharT, _Traits>&
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| 77 | __ostream_insert(basic_ostream<_CharT, _Traits>& __out,
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| 78 | const _CharT* __s, streamsize __n)
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| 79 | {
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| 80 | typedef basic_ostream<_CharT, _Traits> __ostream_type;
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| 81 | typedef typename __ostream_type::ios_base __ios_base;
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| 82 |
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| 83 | typename __ostream_type::sentry __cerb(__out);
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| 84 | if (__cerb)
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| 85 | {
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| 86 | __try
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| 87 | {
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| 88 | const streamsize __w = __out.width();
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| 89 | if (__w > __n)
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| 90 | {
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| 91 | const bool __left = ((__out.flags()
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| 92 | & __ios_base::adjustfield)
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| 93 | == __ios_base::left);
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| 94 | if (!__left)
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| 95 | __ostream_fill(__out, __w - __n);
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| 96 | if (__out.good())
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| 97 | __ostream_write(__out, __s, __n);
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| 98 | if (__left && __out.good())
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| 99 | __ostream_fill(__out, __w - __n);
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| 100 | }
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| 101 | else
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| 102 | __ostream_write(__out, __s, __n);
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| 103 | __out.width(0);
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| 104 | }
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| 105 | __catch(__cxxabiv1::__forced_unwind&)
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| 106 | {
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| 107 | __out._M_setstate(__ios_base::badbit);
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| 108 | __throw_exception_again;
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| 109 | }
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| 110 | __catch(...)
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| 111 | { __out._M_setstate(__ios_base::badbit); }
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| 112 | }
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| 113 | return __out;
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| 114 | }
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| 115 |
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| 116 | // Inhibit implicit instantiations for required instantiations,
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| 117 | // which are defined via explicit instantiations elsewhere.
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| 118 | #if _GLIBCXX_EXTERN_TEMPLATE
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| 119 | extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
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| 120 |
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| 121 | #ifdef _GLIBCXX_USE_WCHAR_T
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| 122 | extern template wostream& __ostream_insert(wostream&, const wchar_t*,
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| 123 | streamsize);
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| 124 | #endif
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| 125 | #endif
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| 126 |
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| 127 | _GLIBCXX_END_NAMESPACE_VERSION
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| 128 | } // namespace std
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| 129 |
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| 130 | #endif /* _OSTREAM_INSERT_H */
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