[1166] | 1 | // String based streams -*- C++ -*-
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| 2 |
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| 3 | // Copyright (C) 1997-2021 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 include/sstream
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| 26 | * This is a Standard C++ Library header.
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| 27 | */
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| 28 |
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| 29 | //
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| 30 | // ISO C++ 14882: 27.7 String-based streams
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| 31 | //
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| 32 |
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| 33 | #ifndef _GLIBCXX_SSTREAM
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| 34 | #define _GLIBCXX_SSTREAM 1
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| 35 |
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| 36 | #pragma GCC system_header
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| 37 |
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| 38 | #include <istream>
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| 39 | #include <ostream>
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| 40 | #include <bits/alloc_traits.h> // allocator_traits, __allocator_like
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| 41 |
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| 42 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
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| 43 | # define _GLIBCXX_LVAL_REF_QUAL &
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| 44 | #else
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| 45 | # define _GLIBCXX_LVAL_REF_QUAL
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| 46 | #endif
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| 47 |
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| 48 | namespace std _GLIBCXX_VISIBILITY(default)
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| 49 | {
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| 50 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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| 51 | _GLIBCXX_BEGIN_NAMESPACE_CXX11
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| 52 |
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| 53 | // [27.7.1] template class basic_stringbuf
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| 54 | /**
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| 55 | * @brief The actual work of input and output (for std::string).
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| 56 | * @ingroup io
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| 57 | *
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| 58 | * @tparam _CharT Type of character stream.
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| 59 | * @tparam _Traits Traits for character type, defaults to
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| 60 | * char_traits<_CharT>.
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| 61 | * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
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| 62 | *
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| 63 | * This class associates either or both of its input and output sequences
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| 64 | * with a sequence of characters, which can be initialized from, or made
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| 65 | * available as, a @c std::basic_string. (Paraphrased from [27.7.1]/1.)
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| 66 | *
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| 67 | * For this class, open modes (of type @c ios_base::openmode) have
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| 68 | * @c in set if the input sequence can be read, and @c out set if the
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| 69 | * output sequence can be written.
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| 70 | */
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| 71 | template<typename _CharT, typename _Traits, typename _Alloc>
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| 72 | class basic_stringbuf : public basic_streambuf<_CharT, _Traits>
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| 73 | {
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| 74 | struct __xfer_bufptrs;
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| 75 |
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| 76 | #if __cplusplus >= 201103L
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| 77 | using allocator_traits = std::allocator_traits<_Alloc>;
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| 78 | using _Noexcept_swap
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| 79 | = __or_<typename allocator_traits::propagate_on_container_swap,
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| 80 | typename allocator_traits::is_always_equal>;
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| 81 | #endif
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| 82 |
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| 83 | public:
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| 84 | // Types:
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| 85 | typedef _CharT char_type;
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| 86 | typedef _Traits traits_type;
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| 87 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
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| 88 | // 251. basic_stringbuf missing allocator_type
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| 89 | typedef _Alloc allocator_type;
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| 90 | typedef typename traits_type::int_type int_type;
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| 91 | typedef typename traits_type::pos_type pos_type;
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| 92 | typedef typename traits_type::off_type off_type;
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| 93 |
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| 94 | typedef basic_streambuf<char_type, traits_type> __streambuf_type;
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| 95 | typedef basic_string<char_type, _Traits, _Alloc> __string_type;
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| 96 | typedef typename __string_type::size_type __size_type;
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| 97 |
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| 98 | protected:
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| 99 | /// Place to stash in || out || in | out settings for current stringbuf.
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| 100 | ios_base::openmode _M_mode;
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| 101 |
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| 102 | // Data Members:
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| 103 | __string_type _M_string;
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| 104 |
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| 105 | public:
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| 106 | // Constructors:
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| 107 |
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| 108 | /**
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| 109 | * @brief Starts with an empty string buffer.
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| 110 | *
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| 111 | * The default constructor initializes the parent class using its
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| 112 | * own default ctor.
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| 113 | */
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| 114 | basic_stringbuf()
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| 115 | : __streambuf_type(), _M_mode(ios_base::in | ios_base::out), _M_string()
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| 116 | { }
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| 117 |
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| 118 | /**
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| 119 | * @brief Starts with an empty string buffer.
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| 120 | * @param __mode Whether the buffer can read, or write, or both.
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| 121 | *
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| 122 | * The default constructor initializes the parent class using its
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| 123 | * own default ctor.
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| 124 | */
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| 125 | explicit
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| 126 | basic_stringbuf(ios_base::openmode __mode)
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| 127 | : __streambuf_type(), _M_mode(__mode), _M_string()
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| 128 | { }
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| 129 |
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| 130 | /**
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| 131 | * @brief Starts with an existing string buffer.
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| 132 | * @param __str A string to copy as a starting buffer.
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| 133 | * @param __mode Whether the buffer can read, or write, or both.
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| 134 | *
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| 135 | * This constructor initializes the parent class using its
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| 136 | * own default ctor.
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| 137 | */
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| 138 | explicit
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| 139 | basic_stringbuf(const __string_type& __str,
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| 140 | ios_base::openmode __mode = ios_base::in | ios_base::out)
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| 141 | : __streambuf_type(), _M_mode(),
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| 142 | _M_string(__str.data(), __str.size(), __str.get_allocator())
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| 143 | { _M_stringbuf_init(__mode); }
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| 144 |
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| 145 | #if __cplusplus >= 201103L
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| 146 | basic_stringbuf(const basic_stringbuf&) = delete;
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| 147 |
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| 148 | basic_stringbuf(basic_stringbuf&& __rhs)
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| 149 | : basic_stringbuf(std::move(__rhs), __xfer_bufptrs(__rhs, this))
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| 150 | { __rhs._M_sync(const_cast<char_type*>(__rhs._M_string.data()), 0, 0); }
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| 151 |
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| 152 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
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| 153 | explicit
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| 154 | basic_stringbuf(const allocator_type& __a)
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| 155 | : basic_stringbuf(ios_base::in | std::ios_base::out, __a)
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| 156 | { }
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| 157 |
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| 158 | basic_stringbuf(ios_base::openmode __mode,
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| 159 | const allocator_type& __a)
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| 160 | : __streambuf_type(), _M_mode(__mode), _M_string(__a)
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| 161 | { }
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| 162 |
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| 163 | explicit
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| 164 | basic_stringbuf(__string_type&& __s,
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| 165 | ios_base::openmode __mode = ios_base::in
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| 166 | | ios_base::out)
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| 167 | : __streambuf_type(), _M_mode(__mode), _M_string(std::move(__s))
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| 168 | { _M_stringbuf_init(__mode); }
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| 169 |
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| 170 | template<typename _SAlloc>
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| 171 | basic_stringbuf(const basic_string<_CharT, _Traits, _SAlloc>& __s,
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| 172 | const allocator_type& __a)
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| 173 | : basic_stringbuf(__s, ios_base::in | std::ios_base::out, __a)
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| 174 | { }
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| 175 |
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| 176 | template<typename _SAlloc>
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| 177 | basic_stringbuf(const basic_string<_CharT, _Traits, _SAlloc>& __s,
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| 178 | ios_base::openmode __mode,
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| 179 | const allocator_type& __a)
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| 180 | : __streambuf_type(), _M_mode(__mode),
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| 181 | _M_string(__s.data(), __s.size(), __a)
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| 182 | { _M_stringbuf_init(__mode); }
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| 183 |
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| 184 | template<typename _SAlloc>
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| 185 | explicit
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| 186 | basic_stringbuf(const basic_string<_CharT, _Traits, _SAlloc>& __s,
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| 187 | ios_base::openmode __mode = ios_base::in
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| 188 | | ios_base::out)
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| 189 | : basic_stringbuf(__s, __mode, allocator_type{})
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| 190 | { }
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| 191 |
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| 192 | basic_stringbuf(basic_stringbuf&& __rhs, const allocator_type& __a)
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| 193 | : basic_stringbuf(std::move(__rhs), __a, __xfer_bufptrs(__rhs, this))
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| 194 | { __rhs._M_sync(const_cast<char_type*>(__rhs._M_string.data()), 0, 0); }
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| 195 |
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| 196 | allocator_type get_allocator() const noexcept
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| 197 | { return _M_string.get_allocator(); }
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| 198 | #endif // C++20
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| 199 |
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| 200 | // 27.8.2.2 Assign and swap:
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| 201 |
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| 202 | basic_stringbuf&
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| 203 | operator=(const basic_stringbuf&) = delete;
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| 204 |
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| 205 | basic_stringbuf&
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| 206 | operator=(basic_stringbuf&& __rhs)
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| 207 | {
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| 208 | __xfer_bufptrs __st{__rhs, this};
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| 209 | const __streambuf_type& __base = __rhs;
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| 210 | __streambuf_type::operator=(__base);
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| 211 | this->pubimbue(__rhs.getloc());
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| 212 | _M_mode = __rhs._M_mode;
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| 213 | _M_string = std::move(__rhs._M_string);
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| 214 | __rhs._M_sync(const_cast<char_type*>(__rhs._M_string.data()), 0, 0);
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| 215 | return *this;
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| 216 | }
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| 217 |
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| 218 | void
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| 219 | swap(basic_stringbuf& __rhs) noexcept(_Noexcept_swap::value)
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| 220 | {
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| 221 | __xfer_bufptrs __l_st{*this, std::__addressof(__rhs)};
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| 222 | __xfer_bufptrs __r_st{__rhs, this};
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| 223 | __streambuf_type& __base = __rhs;
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| 224 | __streambuf_type::swap(__base);
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| 225 | __rhs.pubimbue(this->pubimbue(__rhs.getloc()));
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| 226 | std::swap(_M_mode, __rhs._M_mode);
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| 227 | std::swap(_M_string, __rhs._M_string); // XXX not exception safe
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| 228 | }
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| 229 | #endif // C++11
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| 230 |
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| 231 | // Getters and setters:
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| 232 |
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| 233 | /**
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| 234 | * @brief Copying out the string buffer.
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| 235 | * @return A copy of one of the underlying sequences.
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| 236 | *
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| 237 | * <em>If the buffer is only created in input mode, the underlying
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| 238 | * character sequence is equal to the input sequence; otherwise, it
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| 239 | * is equal to the output sequence.</em> [27.7.1.2]/1
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| 240 | */
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| 241 | __string_type
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| 242 | str() const _GLIBCXX_LVAL_REF_QUAL
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| 243 | {
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| 244 | __string_type __ret(_M_string.get_allocator());
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| 245 | if (char_type* __hi = _M_high_mark())
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| 246 | __ret.assign(this->pbase(), __hi);
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| 247 | else
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| 248 | __ret = _M_string;
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| 249 | return __ret;
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| 250 | }
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| 251 |
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| 252 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
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| 253 | #if __cpp_concepts
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| 254 | template<__allocator_like _SAlloc>
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| 255 | basic_string<_CharT, _Traits, _SAlloc>
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| 256 | str(const _SAlloc& __sa) const
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| 257 | {
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| 258 | auto __sv = view();
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| 259 | return { __sv.data(), __sv.size(), __sa };
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| 260 | }
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| 261 | #endif
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| 262 |
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| 263 | __string_type
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| 264 | str() &&
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| 265 | {
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| 266 | if (char_type* __hi = _M_high_mark())
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| 267 | {
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| 268 | // Set length to end of character sequence and add null terminator.
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| 269 | _M_string._M_set_length(_M_high_mark() - this->pbase());
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| 270 | }
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| 271 | auto __str = std::move(_M_string);
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| 272 | _M_string.clear();
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| 273 | _M_sync(_M_string.data(), 0, 0);
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| 274 | return __str;
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| 275 | }
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| 276 |
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| 277 | basic_string_view<char_type, traits_type>
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| 278 | view() const noexcept
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| 279 | {
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| 280 | if (char_type* __hi = _M_high_mark())
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| 281 | return { this->pbase(), __hi };
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| 282 | else
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| 283 | return _M_string;
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| 284 | }
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| 285 | #endif // C++20
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| 286 |
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| 287 | /**
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| 288 | * @brief Setting a new buffer.
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| 289 | * @param __s The string to use as a new sequence.
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| 290 | *
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| 291 | * Deallocates any previous stored sequence, then copies @a s to
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| 292 | * use as a new one.
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| 293 | */
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| 294 | void
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| 295 | str(const __string_type& __s)
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| 296 | {
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| 297 | // Cannot use _M_string = __s, since v3 strings are COW
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| 298 | // (not always true now but assign() always works).
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| 299 | _M_string.assign(__s.data(), __s.size());
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| 300 | _M_stringbuf_init(_M_mode);
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| 301 | }
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| 302 |
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| 303 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
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| 304 | #if __cpp_concepts
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| 305 | template<__allocator_like _SAlloc>
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| 306 | requires (!is_same_v<_SAlloc, _Alloc>)
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| 307 | void
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| 308 | str(const basic_string<_CharT, _Traits, _SAlloc>& __s)
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| 309 | {
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| 310 | _M_string.assign(__s.data(), __s.size());
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| 311 | _M_stringbuf_init(_M_mode);
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| 312 | }
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| 313 | #endif
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| 314 |
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| 315 | void
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| 316 | str(__string_type&& __s)
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| 317 | {
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| 318 | _M_string = std::move(__s);
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| 319 | _M_stringbuf_init(_M_mode);
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| 320 | }
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| 321 | #endif
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| 322 |
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| 323 | protected:
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| 324 | // Common initialization code goes here.
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| 325 | void
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| 326 | _M_stringbuf_init(ios_base::openmode __mode)
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| 327 | {
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| 328 | _M_mode = __mode;
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| 329 | __size_type __len = 0;
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| 330 | if (_M_mode & (ios_base::ate | ios_base::app))
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| 331 | __len = _M_string.size();
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| 332 | _M_sync(const_cast<char_type*>(_M_string.data()), 0, __len);
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| 333 | }
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| 334 |
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| 335 | virtual streamsize
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| 336 | showmanyc()
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| 337 | {
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| 338 | streamsize __ret = -1;
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| 339 | if (_M_mode & ios_base::in)
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| 340 | {
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| 341 | _M_update_egptr();
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| 342 | __ret = this->egptr() - this->gptr();
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| 343 | }
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| 344 | return __ret;
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| 345 | }
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| 346 |
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| 347 | virtual int_type
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| 348 | underflow();
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| 349 |
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| 350 | virtual int_type
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| 351 | pbackfail(int_type __c = traits_type::eof());
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| 352 |
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| 353 | virtual int_type
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| 354 | overflow(int_type __c = traits_type::eof());
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| 355 |
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| 356 | /**
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| 357 | * @brief Manipulates the buffer.
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| 358 | * @param __s Pointer to a buffer area.
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| 359 | * @param __n Size of @a __s.
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| 360 | * @return @c this
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| 361 | *
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| 362 | * If no buffer has already been created, and both @a __s and @a __n are
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| 363 | * non-zero, then @c __s is used as a buffer; see
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| 364 | * https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering
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| 365 | * for more.
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| 366 | */
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| 367 | virtual __streambuf_type*
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| 368 | setbuf(char_type* __s, streamsize __n)
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| 369 | {
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| 370 | if (__s && __n >= 0)
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| 371 | {
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| 372 | // This is implementation-defined behavior, and assumes
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| 373 | // that an external char_type array of length __n exists
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| 374 | // and has been pre-allocated. If this is not the case,
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| 375 | // things will quickly blow up.
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| 376 |
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| 377 | // Step 1: Destroy the current internal array.
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| 378 | _M_string.clear();
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| 379 |
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| 380 | // Step 2: Use the external array.
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| 381 | _M_sync(__s, __n, 0);
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| 382 | }
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| 383 | return this;
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| 384 | }
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| 385 |
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| 386 | virtual pos_type
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| 387 | seekoff(off_type __off, ios_base::seekdir __way,
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| 388 | ios_base::openmode __mode = ios_base::in | ios_base::out);
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| 389 |
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| 390 | virtual pos_type
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| 391 | seekpos(pos_type __sp,
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| 392 | ios_base::openmode __mode = ios_base::in | ios_base::out);
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| 393 |
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| 394 | // Internal function for correctly updating the internal buffer
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| 395 | // for a particular _M_string, due to initialization or re-sizing
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| 396 | // of an existing _M_string.
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| 397 | void
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| 398 | _M_sync(char_type* __base, __size_type __i, __size_type __o);
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| 399 |
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| 400 | // Internal function for correctly updating egptr() to the actual
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| 401 | // string end.
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| 402 | void
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| 403 | _M_update_egptr()
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| 404 | {
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| 405 | if (char_type* __pptr = this->pptr())
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| 406 | {
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| 407 | char_type* __egptr = this->egptr();
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| 408 | if (!__egptr || __pptr > __egptr)
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| 409 | {
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| 410 | if (_M_mode & ios_base::in)
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| 411 | this->setg(this->eback(), this->gptr(), __pptr);
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| 412 | else
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| 413 | this->setg(__pptr, __pptr, __pptr);
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| 414 | }
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| 415 | }
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| 416 | }
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| 417 |
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| 418 | // Works around the issue with pbump, part of the protected
|
---|
| 419 | // interface of basic_streambuf, taking just an int.
|
---|
| 420 | void
|
---|
| 421 | _M_pbump(char_type* __pbeg, char_type* __pend, off_type __off);
|
---|
| 422 |
|
---|
| 423 | private:
|
---|
| 424 | // Return a pointer to the end of the underlying character sequence.
|
---|
| 425 | // This might not be the same character as _M_string.end() because
|
---|
| 426 | // basic_stringbuf::overflow might have written to unused capacity
|
---|
| 427 | // in _M_string without updating its length.
|
---|
| 428 | char_type*
|
---|
| 429 | _M_high_mark() const _GLIBCXX_NOEXCEPT
|
---|
| 430 | {
|
---|
| 431 | if (char_type* __pptr = this->pptr())
|
---|
| 432 | {
|
---|
| 433 | char_type* __egptr = this->egptr();
|
---|
| 434 | if (!__egptr || __pptr > __egptr)
|
---|
| 435 | return __pptr; // Underlying sequence is [pbase, pptr).
|
---|
| 436 | else
|
---|
| 437 | return __egptr; // Underlying sequence is [pbase, egptr).
|
---|
| 438 | }
|
---|
| 439 | return 0; // Underlying character sequence is just _M_string.
|
---|
| 440 | }
|
---|
| 441 |
|
---|
| 442 | #if __cplusplus >= 201103L
|
---|
| 443 | #if _GLIBCXX_USE_CXX11_ABI
|
---|
| 444 | // This type captures the state of the gptr / pptr pointers as offsets
|
---|
| 445 | // so they can be restored in another object after moving the string.
|
---|
| 446 | struct __xfer_bufptrs
|
---|
| 447 | {
|
---|
| 448 | __xfer_bufptrs(const basic_stringbuf& __from, basic_stringbuf* __to)
|
---|
| 449 | : _M_to{__to}, _M_goff{-1, -1, -1}, _M_poff{-1, -1, -1}
|
---|
| 450 | {
|
---|
| 451 | const _CharT* const __str = __from._M_string.data();
|
---|
| 452 | const _CharT* __end = nullptr;
|
---|
| 453 | if (__from.eback())
|
---|
| 454 | {
|
---|
| 455 | _M_goff[0] = __from.eback() - __str;
|
---|
| 456 | _M_goff[1] = __from.gptr() - __str;
|
---|
| 457 | _M_goff[2] = __from.egptr() - __str;
|
---|
| 458 | __end = __from.egptr();
|
---|
| 459 | }
|
---|
| 460 | if (__from.pbase())
|
---|
| 461 | {
|
---|
| 462 | _M_poff[0] = __from.pbase() - __str;
|
---|
| 463 | _M_poff[1] = __from.pptr() - __from.pbase();
|
---|
| 464 | _M_poff[2] = __from.epptr() - __str;
|
---|
| 465 | if (!__end || __from.pptr() > __end)
|
---|
| 466 | __end = __from.pptr();
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | // Set _M_string length to the greater of the get and put areas.
|
---|
| 470 | if (__end)
|
---|
| 471 | {
|
---|
| 472 | // The const_cast avoids changing this constructor's signature,
|
---|
| 473 | // because it is exported from the dynamic library.
|
---|
| 474 | auto& __mut_from = const_cast<basic_stringbuf&>(__from);
|
---|
| 475 | __mut_from._M_string._M_length(__end - __str);
|
---|
| 476 | }
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | ~__xfer_bufptrs()
|
---|
| 480 | {
|
---|
| 481 | char_type* __str = const_cast<char_type*>(_M_to->_M_string.data());
|
---|
| 482 | if (_M_goff[0] != -1)
|
---|
| 483 | _M_to->setg(__str+_M_goff[0], __str+_M_goff[1], __str+_M_goff[2]);
|
---|
| 484 | if (_M_poff[0] != -1)
|
---|
| 485 | _M_to->_M_pbump(__str+_M_poff[0], __str+_M_poff[2], _M_poff[1]);
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 | basic_stringbuf* _M_to;
|
---|
| 489 | off_type _M_goff[3];
|
---|
| 490 | off_type _M_poff[3];
|
---|
| 491 | };
|
---|
| 492 | #else
|
---|
| 493 | // This type does nothing when using Copy-On-Write strings.
|
---|
| 494 | struct __xfer_bufptrs
|
---|
| 495 | {
|
---|
| 496 | __xfer_bufptrs(const basic_stringbuf&, basic_stringbuf*) { }
|
---|
| 497 | };
|
---|
| 498 | #endif
|
---|
| 499 |
|
---|
| 500 | // The move constructor initializes an __xfer_bufptrs temporary then
|
---|
| 501 | // delegates to this constructor to performs moves during its lifetime.
|
---|
| 502 | basic_stringbuf(basic_stringbuf&& __rhs, __xfer_bufptrs&&)
|
---|
| 503 | : __streambuf_type(static_cast<const __streambuf_type&>(__rhs)),
|
---|
| 504 | _M_mode(__rhs._M_mode), _M_string(std::move(__rhs._M_string))
|
---|
| 505 | { }
|
---|
| 506 |
|
---|
| 507 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 508 | // The move constructor initializes an __xfer_bufptrs temporary then
|
---|
| 509 | // delegates to this constructor to performs moves during its lifetime.
|
---|
| 510 | basic_stringbuf(basic_stringbuf&& __rhs, const allocator_type& __a,
|
---|
| 511 | __xfer_bufptrs&&)
|
---|
| 512 | : __streambuf_type(static_cast<const __streambuf_type&>(__rhs)),
|
---|
| 513 | _M_mode(__rhs._M_mode), _M_string(std::move(__rhs._M_string), __a)
|
---|
| 514 | { }
|
---|
| 515 | #endif
|
---|
| 516 | #endif // C++11
|
---|
| 517 | };
|
---|
| 518 |
|
---|
| 519 |
|
---|
| 520 | // [27.7.2] Template class basic_istringstream
|
---|
| 521 | /**
|
---|
| 522 | * @brief Controlling input for std::string.
|
---|
| 523 | * @ingroup io
|
---|
| 524 | *
|
---|
| 525 | * @tparam _CharT Type of character stream.
|
---|
| 526 | * @tparam _Traits Traits for character type, defaults to
|
---|
| 527 | * char_traits<_CharT>.
|
---|
| 528 | * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
|
---|
| 529 | *
|
---|
| 530 | * This class supports reading from objects of type std::basic_string,
|
---|
| 531 | * using the inherited functions from std::basic_istream. To control
|
---|
| 532 | * the associated sequence, an instance of std::basic_stringbuf is used,
|
---|
| 533 | * which this page refers to as @c sb.
|
---|
| 534 | */
|
---|
| 535 | template<typename _CharT, typename _Traits, typename _Alloc>
|
---|
| 536 | class basic_istringstream : public basic_istream<_CharT, _Traits>
|
---|
| 537 | {
|
---|
| 538 | public:
|
---|
| 539 | // Types:
|
---|
| 540 | typedef _CharT char_type;
|
---|
| 541 | typedef _Traits traits_type;
|
---|
| 542 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
|
---|
| 543 | // 251. basic_stringbuf missing allocator_type
|
---|
| 544 | typedef _Alloc allocator_type;
|
---|
| 545 | typedef typename traits_type::int_type int_type;
|
---|
| 546 | typedef typename traits_type::pos_type pos_type;
|
---|
| 547 | typedef typename traits_type::off_type off_type;
|
---|
| 548 |
|
---|
| 549 | // Non-standard types:
|
---|
| 550 | typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
---|
| 551 | typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
|
---|
| 552 | typedef basic_istream<char_type, traits_type> __istream_type;
|
---|
| 553 |
|
---|
| 554 | private:
|
---|
| 555 | __stringbuf_type _M_stringbuf;
|
---|
| 556 |
|
---|
| 557 | public:
|
---|
| 558 | // Constructors:
|
---|
| 559 |
|
---|
| 560 | /**
|
---|
| 561 | * @brief Default constructor starts with an empty string buffer.
|
---|
| 562 | *
|
---|
| 563 | * Initializes @c sb using @c in, and passes @c &sb to the base
|
---|
| 564 | * class initializer. Does not allocate any buffer.
|
---|
| 565 | *
|
---|
| 566 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 567 | * string class does its own memory management.
|
---|
| 568 | */
|
---|
| 569 | basic_istringstream()
|
---|
| 570 | : __istream_type(), _M_stringbuf(ios_base::in)
|
---|
| 571 | { this->init(&_M_stringbuf); }
|
---|
| 572 |
|
---|
| 573 | /**
|
---|
| 574 | * @brief Starts with an empty string buffer.
|
---|
| 575 | * @param __mode Whether the buffer can read, or write, or both.
|
---|
| 576 | *
|
---|
| 577 | * @c ios_base::in is automatically included in @a __mode.
|
---|
| 578 | *
|
---|
| 579 | * Initializes @c sb using @c __mode|in, and passes @c &sb to the base
|
---|
| 580 | * class initializer. Does not allocate any buffer.
|
---|
| 581 | *
|
---|
| 582 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 583 | * string class does its own memory management.
|
---|
| 584 | */
|
---|
| 585 | explicit
|
---|
| 586 | basic_istringstream(ios_base::openmode __mode)
|
---|
| 587 | : __istream_type(), _M_stringbuf(__mode | ios_base::in)
|
---|
| 588 | { this->init(&_M_stringbuf); }
|
---|
| 589 |
|
---|
| 590 | /**
|
---|
| 591 | * @brief Starts with an existing string buffer.
|
---|
| 592 | * @param __str A string to copy as a starting buffer.
|
---|
| 593 | * @param __mode Whether the buffer can read, or write, or both.
|
---|
| 594 | *
|
---|
| 595 | * @c ios_base::in is automatically included in @a mode.
|
---|
| 596 | *
|
---|
| 597 | * Initializes @c sb using @a str and @c mode|in, and passes @c &sb
|
---|
| 598 | * to the base class initializer.
|
---|
| 599 | *
|
---|
| 600 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 601 | * string class does its own memory management.
|
---|
| 602 | */
|
---|
| 603 | explicit
|
---|
| 604 | basic_istringstream(const __string_type& __str,
|
---|
| 605 | ios_base::openmode __mode = ios_base::in)
|
---|
| 606 | : __istream_type(), _M_stringbuf(__str, __mode | ios_base::in)
|
---|
| 607 | { this->init(&_M_stringbuf); }
|
---|
| 608 |
|
---|
| 609 | /**
|
---|
| 610 | * @brief The destructor does nothing.
|
---|
| 611 | *
|
---|
| 612 | * The buffer is deallocated by the stringbuf object, not the
|
---|
| 613 | * formatting stream.
|
---|
| 614 | */
|
---|
| 615 | ~basic_istringstream()
|
---|
| 616 | { }
|
---|
| 617 |
|
---|
| 618 | #if __cplusplus >= 201103L
|
---|
| 619 | basic_istringstream(const basic_istringstream&) = delete;
|
---|
| 620 |
|
---|
| 621 | basic_istringstream(basic_istringstream&& __rhs)
|
---|
| 622 | : __istream_type(std::move(__rhs)),
|
---|
| 623 | _M_stringbuf(std::move(__rhs._M_stringbuf))
|
---|
| 624 | { __istream_type::set_rdbuf(&_M_stringbuf); }
|
---|
| 625 |
|
---|
| 626 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 627 | basic_istringstream(ios_base::openmode __mode, const allocator_type& __a)
|
---|
| 628 | : __istream_type(), _M_stringbuf(__mode | ios_base::in, __a)
|
---|
| 629 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 630 |
|
---|
| 631 | explicit
|
---|
| 632 | basic_istringstream(__string_type&& __str,
|
---|
| 633 | ios_base::openmode __mode = ios_base::in)
|
---|
| 634 | : __istream_type(), _M_stringbuf(std::move(__str), __mode | ios_base::in)
|
---|
| 635 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 636 |
|
---|
| 637 | template<typename _SAlloc>
|
---|
| 638 | basic_istringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 639 | const allocator_type& __a)
|
---|
| 640 | : basic_istringstream(__str, ios_base::in, __a)
|
---|
| 641 | { }
|
---|
| 642 |
|
---|
| 643 | template<typename _SAlloc>
|
---|
| 644 | basic_istringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 645 | ios_base::openmode __mode,
|
---|
| 646 | const allocator_type& __a)
|
---|
| 647 | : __istream_type(), _M_stringbuf(__str, __mode | ios_base::in, __a)
|
---|
| 648 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 649 |
|
---|
| 650 | template<typename _SAlloc>
|
---|
| 651 | explicit
|
---|
| 652 | basic_istringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 653 | ios_base::openmode __mode = ios_base::in)
|
---|
| 654 | : basic_istringstream(__str, __mode, allocator_type())
|
---|
| 655 | { }
|
---|
| 656 | #endif // C++20
|
---|
| 657 |
|
---|
| 658 | // 27.8.3.2 Assign and swap:
|
---|
| 659 |
|
---|
| 660 | basic_istringstream&
|
---|
| 661 | operator=(const basic_istringstream&) = delete;
|
---|
| 662 |
|
---|
| 663 | basic_istringstream&
|
---|
| 664 | operator=(basic_istringstream&& __rhs)
|
---|
| 665 | {
|
---|
| 666 | __istream_type::operator=(std::move(__rhs));
|
---|
| 667 | _M_stringbuf = std::move(__rhs._M_stringbuf);
|
---|
| 668 | return *this;
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | void
|
---|
| 672 | swap(basic_istringstream& __rhs)
|
---|
| 673 | {
|
---|
| 674 | __istream_type::swap(__rhs);
|
---|
| 675 | _M_stringbuf.swap(__rhs._M_stringbuf);
|
---|
| 676 | }
|
---|
| 677 | #endif // C++11
|
---|
| 678 |
|
---|
| 679 | // Members:
|
---|
| 680 | /**
|
---|
| 681 | * @brief Accessing the underlying buffer.
|
---|
| 682 | * @return The current basic_stringbuf buffer.
|
---|
| 683 | *
|
---|
| 684 | * This hides both signatures of std::basic_ios::rdbuf().
|
---|
| 685 | */
|
---|
| 686 | __stringbuf_type*
|
---|
| 687 | rdbuf() const
|
---|
| 688 | { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
|
---|
| 689 |
|
---|
| 690 | /**
|
---|
| 691 | * @brief Copying out the string buffer.
|
---|
| 692 | * @return @c rdbuf()->str()
|
---|
| 693 | */
|
---|
| 694 | __string_type
|
---|
| 695 | str() const _GLIBCXX_LVAL_REF_QUAL
|
---|
| 696 | { return _M_stringbuf.str(); }
|
---|
| 697 |
|
---|
| 698 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 699 | #if __cpp_concepts
|
---|
| 700 | template<__allocator_like _SAlloc>
|
---|
| 701 | basic_string<_CharT, _Traits, _SAlloc>
|
---|
| 702 | str(const _SAlloc& __sa) const
|
---|
| 703 | { return _M_stringbuf.str(__sa); }
|
---|
| 704 | #endif
|
---|
| 705 |
|
---|
| 706 | __string_type
|
---|
| 707 | str() &&
|
---|
| 708 | { return std::move(_M_stringbuf).str(); }
|
---|
| 709 |
|
---|
| 710 | basic_string_view<char_type, traits_type>
|
---|
| 711 | view() const noexcept
|
---|
| 712 | { return _M_stringbuf.view(); }
|
---|
| 713 | #endif
|
---|
| 714 |
|
---|
| 715 | /**
|
---|
| 716 | * @brief Setting a new buffer.
|
---|
| 717 | * @param __s The string to use as a new sequence.
|
---|
| 718 | *
|
---|
| 719 | * Calls @c rdbuf()->str(s).
|
---|
| 720 | */
|
---|
| 721 | void
|
---|
| 722 | str(const __string_type& __s)
|
---|
| 723 | { _M_stringbuf.str(__s); }
|
---|
| 724 |
|
---|
| 725 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 726 | #if __cpp_concepts
|
---|
| 727 | template<__allocator_like _SAlloc>
|
---|
| 728 | requires (!is_same_v<_SAlloc, _Alloc>)
|
---|
| 729 | void
|
---|
| 730 | str(const basic_string<_CharT, _Traits, _SAlloc>& __s)
|
---|
| 731 | { _M_stringbuf.str(__s); }
|
---|
| 732 | #endif
|
---|
| 733 |
|
---|
| 734 | void
|
---|
| 735 | str(__string_type&& __s)
|
---|
| 736 | { _M_stringbuf.str(std::move(__s)); }
|
---|
| 737 | #endif
|
---|
| 738 | };
|
---|
| 739 |
|
---|
| 740 |
|
---|
| 741 | // [27.7.3] Template class basic_ostringstream
|
---|
| 742 | /**
|
---|
| 743 | * @brief Controlling output for std::string.
|
---|
| 744 | * @ingroup io
|
---|
| 745 | *
|
---|
| 746 | * @tparam _CharT Type of character stream.
|
---|
| 747 | * @tparam _Traits Traits for character type, defaults to
|
---|
| 748 | * char_traits<_CharT>.
|
---|
| 749 | * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
|
---|
| 750 | *
|
---|
| 751 | * This class supports writing to objects of type std::basic_string,
|
---|
| 752 | * using the inherited functions from std::basic_ostream. To control
|
---|
| 753 | * the associated sequence, an instance of std::basic_stringbuf is used,
|
---|
| 754 | * which this page refers to as @c sb.
|
---|
| 755 | */
|
---|
| 756 | template <typename _CharT, typename _Traits, typename _Alloc>
|
---|
| 757 | class basic_ostringstream : public basic_ostream<_CharT, _Traits>
|
---|
| 758 | {
|
---|
| 759 | public:
|
---|
| 760 | // Types:
|
---|
| 761 | typedef _CharT char_type;
|
---|
| 762 | typedef _Traits traits_type;
|
---|
| 763 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
|
---|
| 764 | // 251. basic_stringbuf missing allocator_type
|
---|
| 765 | typedef _Alloc allocator_type;
|
---|
| 766 | typedef typename traits_type::int_type int_type;
|
---|
| 767 | typedef typename traits_type::pos_type pos_type;
|
---|
| 768 | typedef typename traits_type::off_type off_type;
|
---|
| 769 |
|
---|
| 770 | // Non-standard types:
|
---|
| 771 | typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
---|
| 772 | typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
|
---|
| 773 | typedef basic_ostream<char_type, traits_type> __ostream_type;
|
---|
| 774 |
|
---|
| 775 | private:
|
---|
| 776 | __stringbuf_type _M_stringbuf;
|
---|
| 777 |
|
---|
| 778 | public:
|
---|
| 779 | // Constructors/destructor:
|
---|
| 780 |
|
---|
| 781 | /**
|
---|
| 782 | * @brief Default constructor starts with an empty string buffer.
|
---|
| 783 | *
|
---|
| 784 | * Initializes @c sb using @c mode|out, and passes @c &sb to the base
|
---|
| 785 | * class initializer. Does not allocate any buffer.
|
---|
| 786 | *
|
---|
| 787 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 788 | * string class does its own memory management.
|
---|
| 789 | */
|
---|
| 790 | basic_ostringstream()
|
---|
| 791 | : __ostream_type(), _M_stringbuf(ios_base::out)
|
---|
| 792 | { this->init(&_M_stringbuf); }
|
---|
| 793 |
|
---|
| 794 | /**
|
---|
| 795 | * @brief Starts with an empty string buffer.
|
---|
| 796 | * @param __mode Whether the buffer can read, or write, or both.
|
---|
| 797 | *
|
---|
| 798 | * @c ios_base::out is automatically included in @a mode.
|
---|
| 799 | *
|
---|
| 800 | * Initializes @c sb using @c mode|out, and passes @c &sb to the base
|
---|
| 801 | * class initializer. Does not allocate any buffer.
|
---|
| 802 | *
|
---|
| 803 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 804 | * string class does its own memory management.
|
---|
| 805 | */
|
---|
| 806 | explicit
|
---|
| 807 | basic_ostringstream(ios_base::openmode __mode)
|
---|
| 808 | : __ostream_type(), _M_stringbuf(__mode | ios_base::out)
|
---|
| 809 | { this->init(&_M_stringbuf); }
|
---|
| 810 |
|
---|
| 811 | /**
|
---|
| 812 | * @brief Starts with an existing string buffer.
|
---|
| 813 | * @param __str A string to copy as a starting buffer.
|
---|
| 814 | * @param __mode Whether the buffer can read, or write, or both.
|
---|
| 815 | *
|
---|
| 816 | * @c ios_base::out is automatically included in @a mode.
|
---|
| 817 | *
|
---|
| 818 | * Initializes @c sb using @a str and @c mode|out, and passes @c &sb
|
---|
| 819 | * to the base class initializer.
|
---|
| 820 | *
|
---|
| 821 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 822 | * string class does its own memory management.
|
---|
| 823 | */
|
---|
| 824 | explicit
|
---|
| 825 | basic_ostringstream(const __string_type& __str,
|
---|
| 826 | ios_base::openmode __mode = ios_base::out)
|
---|
| 827 | : __ostream_type(), _M_stringbuf(__str, __mode | ios_base::out)
|
---|
| 828 | { this->init(&_M_stringbuf); }
|
---|
| 829 |
|
---|
| 830 | /**
|
---|
| 831 | * @brief The destructor does nothing.
|
---|
| 832 | *
|
---|
| 833 | * The buffer is deallocated by the stringbuf object, not the
|
---|
| 834 | * formatting stream.
|
---|
| 835 | */
|
---|
| 836 | ~basic_ostringstream()
|
---|
| 837 | { }
|
---|
| 838 |
|
---|
| 839 | #if __cplusplus >= 201103L
|
---|
| 840 | basic_ostringstream(const basic_ostringstream&) = delete;
|
---|
| 841 |
|
---|
| 842 | basic_ostringstream(basic_ostringstream&& __rhs)
|
---|
| 843 | : __ostream_type(std::move(__rhs)),
|
---|
| 844 | _M_stringbuf(std::move(__rhs._M_stringbuf))
|
---|
| 845 | { __ostream_type::set_rdbuf(&_M_stringbuf); }
|
---|
| 846 |
|
---|
| 847 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 848 | basic_ostringstream(ios_base::openmode __mode, const allocator_type& __a)
|
---|
| 849 | : __ostream_type(), _M_stringbuf(__mode | ios_base::out, __a)
|
---|
| 850 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 851 |
|
---|
| 852 | explicit
|
---|
| 853 | basic_ostringstream(__string_type&& __str,
|
---|
| 854 | ios_base::openmode __mode = ios_base::out)
|
---|
| 855 | : __ostream_type(), _M_stringbuf(std::move(__str), __mode | ios_base::out)
|
---|
| 856 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 857 |
|
---|
| 858 | template<typename _SAlloc>
|
---|
| 859 | basic_ostringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 860 | const allocator_type& __a)
|
---|
| 861 | : basic_ostringstream(__str, ios_base::out, __a)
|
---|
| 862 | { }
|
---|
| 863 |
|
---|
| 864 | template<typename _SAlloc>
|
---|
| 865 | basic_ostringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 866 | ios_base::openmode __mode,
|
---|
| 867 | const allocator_type& __a)
|
---|
| 868 | : __ostream_type(), _M_stringbuf(__str, __mode | ios_base::out, __a)
|
---|
| 869 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 870 |
|
---|
| 871 | template<typename _SAlloc>
|
---|
| 872 | explicit
|
---|
| 873 | basic_ostringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 874 | ios_base::openmode __mode = ios_base::out)
|
---|
| 875 | : basic_ostringstream(__str, __mode, allocator_type())
|
---|
| 876 | { }
|
---|
| 877 | #endif // C++20
|
---|
| 878 |
|
---|
| 879 | // 27.8.3.2 Assign and swap:
|
---|
| 880 |
|
---|
| 881 | basic_ostringstream&
|
---|
| 882 | operator=(const basic_ostringstream&) = delete;
|
---|
| 883 |
|
---|
| 884 | basic_ostringstream&
|
---|
| 885 | operator=(basic_ostringstream&& __rhs)
|
---|
| 886 | {
|
---|
| 887 | __ostream_type::operator=(std::move(__rhs));
|
---|
| 888 | _M_stringbuf = std::move(__rhs._M_stringbuf);
|
---|
| 889 | return *this;
|
---|
| 890 | }
|
---|
| 891 |
|
---|
| 892 | void
|
---|
| 893 | swap(basic_ostringstream& __rhs)
|
---|
| 894 | {
|
---|
| 895 | __ostream_type::swap(__rhs);
|
---|
| 896 | _M_stringbuf.swap(__rhs._M_stringbuf);
|
---|
| 897 | }
|
---|
| 898 | #endif // C++11
|
---|
| 899 |
|
---|
| 900 | // Members:
|
---|
| 901 | /**
|
---|
| 902 | * @brief Accessing the underlying buffer.
|
---|
| 903 | * @return The current basic_stringbuf buffer.
|
---|
| 904 | *
|
---|
| 905 | * This hides both signatures of std::basic_ios::rdbuf().
|
---|
| 906 | */
|
---|
| 907 | __stringbuf_type*
|
---|
| 908 | rdbuf() const
|
---|
| 909 | { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
|
---|
| 910 |
|
---|
| 911 | /**
|
---|
| 912 | * @brief Copying out the string buffer.
|
---|
| 913 | * @return @c rdbuf()->str()
|
---|
| 914 | */
|
---|
| 915 | __string_type
|
---|
| 916 | str() const _GLIBCXX_LVAL_REF_QUAL
|
---|
| 917 | { return _M_stringbuf.str(); }
|
---|
| 918 |
|
---|
| 919 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 920 | #if __cpp_concepts
|
---|
| 921 | template<__allocator_like _SAlloc>
|
---|
| 922 | basic_string<_CharT, _Traits, _SAlloc>
|
---|
| 923 | str(const _SAlloc& __sa) const
|
---|
| 924 | { return _M_stringbuf.str(__sa); }
|
---|
| 925 | #endif
|
---|
| 926 |
|
---|
| 927 | __string_type
|
---|
| 928 | str() &&
|
---|
| 929 | { return std::move(_M_stringbuf).str(); }
|
---|
| 930 |
|
---|
| 931 | basic_string_view<char_type, traits_type>
|
---|
| 932 | view() const noexcept
|
---|
| 933 | { return _M_stringbuf.view(); }
|
---|
| 934 | #endif
|
---|
| 935 |
|
---|
| 936 | /**
|
---|
| 937 | * @brief Setting a new buffer.
|
---|
| 938 | * @param __s The string to use as a new sequence.
|
---|
| 939 | *
|
---|
| 940 | * Calls @c rdbuf()->str(s).
|
---|
| 941 | */
|
---|
| 942 | void
|
---|
| 943 | str(const __string_type& __s)
|
---|
| 944 | { _M_stringbuf.str(__s); }
|
---|
| 945 |
|
---|
| 946 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 947 | #if __cpp_concepts
|
---|
| 948 | template<__allocator_like _SAlloc>
|
---|
| 949 | requires (!is_same_v<_SAlloc, _Alloc>)
|
---|
| 950 | void
|
---|
| 951 | str(const basic_string<_CharT, _Traits, _SAlloc>& __s)
|
---|
| 952 | { _M_stringbuf.str(__s); }
|
---|
| 953 | #endif
|
---|
| 954 |
|
---|
| 955 | void
|
---|
| 956 | str(__string_type&& __s)
|
---|
| 957 | { _M_stringbuf.str(std::move(__s)); }
|
---|
| 958 | #endif
|
---|
| 959 | };
|
---|
| 960 |
|
---|
| 961 |
|
---|
| 962 | // [27.7.4] Template class basic_stringstream
|
---|
| 963 | /**
|
---|
| 964 | * @brief Controlling input and output for std::string.
|
---|
| 965 | * @ingroup io
|
---|
| 966 | *
|
---|
| 967 | * @tparam _CharT Type of character stream.
|
---|
| 968 | * @tparam _Traits Traits for character type, defaults to
|
---|
| 969 | * char_traits<_CharT>.
|
---|
| 970 | * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
|
---|
| 971 | *
|
---|
| 972 | * This class supports reading from and writing to objects of type
|
---|
| 973 | * std::basic_string, using the inherited functions from
|
---|
| 974 | * std::basic_iostream. To control the associated sequence, an instance
|
---|
| 975 | * of std::basic_stringbuf is used, which this page refers to as @c sb.
|
---|
| 976 | */
|
---|
| 977 | template <typename _CharT, typename _Traits, typename _Alloc>
|
---|
| 978 | class basic_stringstream : public basic_iostream<_CharT, _Traits>
|
---|
| 979 | {
|
---|
| 980 | public:
|
---|
| 981 | // Types:
|
---|
| 982 | typedef _CharT char_type;
|
---|
| 983 | typedef _Traits traits_type;
|
---|
| 984 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
|
---|
| 985 | // 251. basic_stringbuf missing allocator_type
|
---|
| 986 | typedef _Alloc allocator_type;
|
---|
| 987 | typedef typename traits_type::int_type int_type;
|
---|
| 988 | typedef typename traits_type::pos_type pos_type;
|
---|
| 989 | typedef typename traits_type::off_type off_type;
|
---|
| 990 |
|
---|
| 991 | // Non-standard Types:
|
---|
| 992 | typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
|
---|
| 993 | typedef basic_stringbuf<_CharT, _Traits, _Alloc> __stringbuf_type;
|
---|
| 994 | typedef basic_iostream<char_type, traits_type> __iostream_type;
|
---|
| 995 |
|
---|
| 996 | private:
|
---|
| 997 | __stringbuf_type _M_stringbuf;
|
---|
| 998 |
|
---|
| 999 | public:
|
---|
| 1000 | // Constructors/destructors
|
---|
| 1001 |
|
---|
| 1002 | /**
|
---|
| 1003 | * @brief Default constructor starts with an empty string buffer.
|
---|
| 1004 | *
|
---|
| 1005 | * Initializes @c sb using the mode @c in|out, and passes @c &sb
|
---|
| 1006 | * to the base class initializer. Does not allocate any buffer.
|
---|
| 1007 | *
|
---|
| 1008 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 1009 | * string class does its own memory management.
|
---|
| 1010 | */
|
---|
| 1011 | basic_stringstream()
|
---|
| 1012 | : __iostream_type(), _M_stringbuf(ios_base::out | ios_base::in)
|
---|
| 1013 | { this->init(&_M_stringbuf); }
|
---|
| 1014 |
|
---|
| 1015 | /**
|
---|
| 1016 | * @brief Starts with an empty string buffer.
|
---|
| 1017 | * @param __m Whether the buffer can read, or write, or both.
|
---|
| 1018 | *
|
---|
| 1019 | * Initializes @c sb using the mode from @c __m, and passes @c &sb
|
---|
| 1020 | * to the base class initializer. Does not allocate any buffer.
|
---|
| 1021 | *
|
---|
| 1022 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 1023 | * string class does its own memory management.
|
---|
| 1024 | */
|
---|
| 1025 | explicit
|
---|
| 1026 | basic_stringstream(ios_base::openmode __m)
|
---|
| 1027 | : __iostream_type(), _M_stringbuf(__m)
|
---|
| 1028 | { this->init(&_M_stringbuf); }
|
---|
| 1029 |
|
---|
| 1030 | /**
|
---|
| 1031 | * @brief Starts with an existing string buffer.
|
---|
| 1032 | * @param __str A string to copy as a starting buffer.
|
---|
| 1033 | * @param __m Whether the buffer can read, or write, or both.
|
---|
| 1034 | *
|
---|
| 1035 | * Initializes @c sb using @a __str and @c __m, and passes @c &sb
|
---|
| 1036 | * to the base class initializer.
|
---|
| 1037 | *
|
---|
| 1038 | * That's a lie. We initialize the base class with NULL, because the
|
---|
| 1039 | * string class does its own memory management.
|
---|
| 1040 | */
|
---|
| 1041 | explicit
|
---|
| 1042 | basic_stringstream(const __string_type& __str,
|
---|
| 1043 | ios_base::openmode __m = ios_base::out | ios_base::in)
|
---|
| 1044 | : __iostream_type(), _M_stringbuf(__str, __m)
|
---|
| 1045 | { this->init(&_M_stringbuf); }
|
---|
| 1046 |
|
---|
| 1047 | /**
|
---|
| 1048 | * @brief The destructor does nothing.
|
---|
| 1049 | *
|
---|
| 1050 | * The buffer is deallocated by the stringbuf object, not the
|
---|
| 1051 | * formatting stream.
|
---|
| 1052 | */
|
---|
| 1053 | ~basic_stringstream()
|
---|
| 1054 | { }
|
---|
| 1055 |
|
---|
| 1056 | #if __cplusplus >= 201103L
|
---|
| 1057 | basic_stringstream(const basic_stringstream&) = delete;
|
---|
| 1058 |
|
---|
| 1059 | basic_stringstream(basic_stringstream&& __rhs)
|
---|
| 1060 | : __iostream_type(std::move(__rhs)),
|
---|
| 1061 | _M_stringbuf(std::move(__rhs._M_stringbuf))
|
---|
| 1062 | { __iostream_type::set_rdbuf(&_M_stringbuf); }
|
---|
| 1063 |
|
---|
| 1064 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 1065 | basic_stringstream(ios_base::openmode __mode, const allocator_type& __a)
|
---|
| 1066 | : __iostream_type(), _M_stringbuf(__mode, __a)
|
---|
| 1067 | { this->init(&_M_stringbuf); }
|
---|
| 1068 |
|
---|
| 1069 | explicit
|
---|
| 1070 | basic_stringstream(__string_type&& __str,
|
---|
| 1071 | ios_base::openmode __mode = ios_base::in
|
---|
| 1072 | | ios_base::out)
|
---|
| 1073 | : __iostream_type(), _M_stringbuf(std::move(__str), __mode)
|
---|
| 1074 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 1075 |
|
---|
| 1076 | template<typename _SAlloc>
|
---|
| 1077 | basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 1078 | const allocator_type& __a)
|
---|
| 1079 | : basic_stringstream(__str, ios_base::in | ios_base::out, __a)
|
---|
| 1080 | { }
|
---|
| 1081 |
|
---|
| 1082 | template<typename _SAlloc>
|
---|
| 1083 | basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 1084 | ios_base::openmode __mode,
|
---|
| 1085 | const allocator_type& __a)
|
---|
| 1086 | : __iostream_type(), _M_stringbuf(__str, __mode, __a)
|
---|
| 1087 | { this->init(std::__addressof(_M_stringbuf)); }
|
---|
| 1088 |
|
---|
| 1089 | template<typename _SAlloc>
|
---|
| 1090 | explicit
|
---|
| 1091 | basic_stringstream(const basic_string<_CharT, _Traits, _SAlloc>& __str,
|
---|
| 1092 | ios_base::openmode __mode = ios_base::in
|
---|
| 1093 | | ios_base::out)
|
---|
| 1094 | : basic_stringstream(__str, __mode, allocator_type())
|
---|
| 1095 | { }
|
---|
| 1096 | #endif // C++20
|
---|
| 1097 |
|
---|
| 1098 | // 27.8.3.2 Assign and swap:
|
---|
| 1099 |
|
---|
| 1100 | basic_stringstream&
|
---|
| 1101 | operator=(const basic_stringstream&) = delete;
|
---|
| 1102 |
|
---|
| 1103 | basic_stringstream&
|
---|
| 1104 | operator=(basic_stringstream&& __rhs)
|
---|
| 1105 | {
|
---|
| 1106 | __iostream_type::operator=(std::move(__rhs));
|
---|
| 1107 | _M_stringbuf = std::move(__rhs._M_stringbuf);
|
---|
| 1108 | return *this;
|
---|
| 1109 | }
|
---|
| 1110 |
|
---|
| 1111 | void
|
---|
| 1112 | swap(basic_stringstream& __rhs)
|
---|
| 1113 | {
|
---|
| 1114 | __iostream_type::swap(__rhs);
|
---|
| 1115 | _M_stringbuf.swap(__rhs._M_stringbuf);
|
---|
| 1116 | }
|
---|
| 1117 | #endif // C++11
|
---|
| 1118 |
|
---|
| 1119 | // Members:
|
---|
| 1120 | /**
|
---|
| 1121 | * @brief Accessing the underlying buffer.
|
---|
| 1122 | * @return The current basic_stringbuf buffer.
|
---|
| 1123 | *
|
---|
| 1124 | * This hides both signatures of std::basic_ios::rdbuf().
|
---|
| 1125 | */
|
---|
| 1126 | __stringbuf_type*
|
---|
| 1127 | rdbuf() const
|
---|
| 1128 | { return const_cast<__stringbuf_type*>(&_M_stringbuf); }
|
---|
| 1129 |
|
---|
| 1130 | /**
|
---|
| 1131 | * @brief Copying out the string buffer.
|
---|
| 1132 | * @return @c rdbuf()->str()
|
---|
| 1133 | */
|
---|
| 1134 | __string_type
|
---|
| 1135 | str() const _GLIBCXX_LVAL_REF_QUAL
|
---|
| 1136 | { return _M_stringbuf.str(); }
|
---|
| 1137 |
|
---|
| 1138 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 1139 | #if __cpp_concepts
|
---|
| 1140 | template<__allocator_like _SAlloc>
|
---|
| 1141 | basic_string<_CharT, _Traits, _SAlloc>
|
---|
| 1142 | str(const _SAlloc& __sa) const
|
---|
| 1143 | { return _M_stringbuf.str(__sa); }
|
---|
| 1144 | #endif
|
---|
| 1145 |
|
---|
| 1146 | __string_type
|
---|
| 1147 | str() &&
|
---|
| 1148 | { return std::move(_M_stringbuf).str(); }
|
---|
| 1149 |
|
---|
| 1150 | basic_string_view<char_type, traits_type>
|
---|
| 1151 | view() const noexcept
|
---|
| 1152 | { return _M_stringbuf.view(); }
|
---|
| 1153 | #endif
|
---|
| 1154 |
|
---|
| 1155 | /**
|
---|
| 1156 | * @brief Setting a new buffer.
|
---|
| 1157 | * @param __s The string to use as a new sequence.
|
---|
| 1158 | *
|
---|
| 1159 | * Calls @c rdbuf()->str(s).
|
---|
| 1160 | */
|
---|
| 1161 | void
|
---|
| 1162 | str(const __string_type& __s)
|
---|
| 1163 | { _M_stringbuf.str(__s); }
|
---|
| 1164 |
|
---|
| 1165 | #if __cplusplus > 201703L && _GLIBCXX_USE_CXX11_ABI
|
---|
| 1166 | #if __cpp_concepts
|
---|
| 1167 | template<__allocator_like _SAlloc>
|
---|
| 1168 | requires (!is_same_v<_SAlloc, _Alloc>)
|
---|
| 1169 | void
|
---|
| 1170 | str(const basic_string<_CharT, _Traits, _SAlloc>& __s)
|
---|
| 1171 | { _M_stringbuf.str(__s); }
|
---|
| 1172 | #endif
|
---|
| 1173 |
|
---|
| 1174 | void
|
---|
| 1175 | str(__string_type&& __s)
|
---|
| 1176 | { _M_stringbuf.str(std::move(__s)); }
|
---|
| 1177 | #endif
|
---|
| 1178 | };
|
---|
| 1179 |
|
---|
| 1180 | #if __cplusplus >= 201103L
|
---|
| 1181 | /// Swap specialization for stringbufs.
|
---|
| 1182 | template <class _CharT, class _Traits, class _Allocator>
|
---|
| 1183 | inline void
|
---|
| 1184 | swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x,
|
---|
| 1185 | basic_stringbuf<_CharT, _Traits, _Allocator>& __y)
|
---|
| 1186 | noexcept(noexcept(__x.swap(__y)))
|
---|
| 1187 | { __x.swap(__y); }
|
---|
| 1188 |
|
---|
| 1189 | /// Swap specialization for istringstreams.
|
---|
| 1190 | template <class _CharT, class _Traits, class _Allocator>
|
---|
| 1191 | inline void
|
---|
| 1192 | swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x,
|
---|
| 1193 | basic_istringstream<_CharT, _Traits, _Allocator>& __y)
|
---|
| 1194 | { __x.swap(__y); }
|
---|
| 1195 |
|
---|
| 1196 | /// Swap specialization for ostringstreams.
|
---|
| 1197 | template <class _CharT, class _Traits, class _Allocator>
|
---|
| 1198 | inline void
|
---|
| 1199 | swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x,
|
---|
| 1200 | basic_ostringstream<_CharT, _Traits, _Allocator>& __y)
|
---|
| 1201 | { __x.swap(__y); }
|
---|
| 1202 |
|
---|
| 1203 | /// Swap specialization for stringstreams.
|
---|
| 1204 | template <class _CharT, class _Traits, class _Allocator>
|
---|
| 1205 | inline void
|
---|
| 1206 | swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,
|
---|
| 1207 | basic_stringstream<_CharT, _Traits, _Allocator>& __y)
|
---|
| 1208 | { __x.swap(__y); }
|
---|
| 1209 | #endif // C++11
|
---|
| 1210 |
|
---|
| 1211 | _GLIBCXX_END_NAMESPACE_CXX11
|
---|
| 1212 | _GLIBCXX_END_NAMESPACE_VERSION
|
---|
| 1213 | } // namespace
|
---|
| 1214 |
|
---|
| 1215 | #undef _GLIBCXX_LVAL_REF_QUAL
|
---|
| 1216 |
|
---|
| 1217 | #include <bits/sstream.tcc>
|
---|
| 1218 |
|
---|
| 1219 | #endif /* _GLIBCXX_SSTREAM */
|
---|