| 1 | // Locale support (codecvt) -*- C++ -*-
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| 2 |
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| 3 | // Copyright (C) 2000-2021 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/codecvt.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{locale}
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| 28 | */
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| 29 |
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| 30 | //
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| 31 | // ISO C++ 14882: 22.2.1.5 Template class codecvt
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| 32 | //
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| 33 |
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| 34 | // Written by Benjamin Kosnik <bkoz@redhat.com>
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| 35 |
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| 36 | #ifndef _CODECVT_H
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| 37 | #define _CODECVT_H 1
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| 38 |
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| 39 | #pragma GCC system_header
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| 40 |
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| 41 | #include <bits/c++config.h>
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| 42 | #include <bits/locale_classes.h> // locale::facet
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| 43 |
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| 44 | namespace std _GLIBCXX_VISIBILITY(default)
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| 45 | {
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| 46 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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| 47 |
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| 48 | /// Empty base class for codecvt facet [22.2.1.5].
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| 49 | class codecvt_base
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| 50 | {
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| 51 | public:
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| 52 | enum result
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| 53 | {
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| 54 | ok,
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| 55 | partial,
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| 56 | error,
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| 57 | noconv
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| 58 | };
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| 59 | };
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| 60 |
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| 61 | /**
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| 62 | * @brief Common base for codecvt functions.
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| 63 | *
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| 64 | * This template class provides implementations of the public functions
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| 65 | * that forward to the protected virtual functions.
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| 66 | *
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| 67 | * This template also provides abstract stubs for the protected virtual
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| 68 | * functions.
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| 69 | */
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| 70 | template<typename _InternT, typename _ExternT, typename _StateT>
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| 71 | class __codecvt_abstract_base
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| 72 | : public locale::facet, public codecvt_base
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| 73 | {
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| 74 | public:
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| 75 | // Types:
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| 76 | typedef codecvt_base::result result;
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| 77 | typedef _InternT intern_type;
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| 78 | typedef _ExternT extern_type;
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| 79 | typedef _StateT state_type;
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| 80 |
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| 81 | // 22.2.1.5.1 codecvt members
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| 82 | /**
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| 83 | * @brief Convert from internal to external character set.
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| 84 | *
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| 85 | * Converts input string of intern_type to output string of
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| 86 | * extern_type. This is analogous to wcsrtombs. It does this by
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| 87 | * calling codecvt::do_out.
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| 88 | *
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| 89 | * The source and destination character sets are determined by the
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| 90 | * facet's locale, internal and external types.
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| 91 | *
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| 92 | * The characters in [from,from_end) are converted and written to
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| 93 | * [to,to_end). from_next and to_next are set to point to the
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| 94 | * character following the last successfully converted character,
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| 95 | * respectively. If the result needed no conversion, from_next and
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| 96 | * to_next are not affected.
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| 97 | *
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| 98 | * The @a state argument should be initialized if the input is at the
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| 99 | * beginning and carried from a previous call if continuing
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| 100 | * conversion. There are no guarantees about how @a state is used.
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| 101 | *
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| 102 | * The result returned is a member of codecvt_base::result. If
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| 103 | * all the input is converted, returns codecvt_base::ok. If no
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| 104 | * conversion is necessary, returns codecvt_base::noconv. If
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| 105 | * the input ends early or there is insufficient space in the
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| 106 | * output, returns codecvt_base::partial. Otherwise the
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| 107 | * conversion failed and codecvt_base::error is returned.
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| 108 | *
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| 109 | * @param __state Persistent conversion state data.
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| 110 | * @param __from Start of input.
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| 111 | * @param __from_end End of input.
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| 112 | * @param __from_next Returns start of unconverted data.
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| 113 | * @param __to Start of output buffer.
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| 114 | * @param __to_end End of output buffer.
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| 115 | * @param __to_next Returns start of unused output area.
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| 116 | * @return codecvt_base::result.
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| 117 | */
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| 118 | result
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| 119 | out(state_type& __state, const intern_type* __from,
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| 120 | const intern_type* __from_end, const intern_type*& __from_next,
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| 121 | extern_type* __to, extern_type* __to_end,
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| 122 | extern_type*& __to_next) const
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| 123 | {
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| 124 | return this->do_out(__state, __from, __from_end, __from_next,
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| 125 | __to, __to_end, __to_next);
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| 126 | }
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| 127 |
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| 128 | /**
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| 129 | * @brief Reset conversion state.
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| 130 | *
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| 131 | * Writes characters to output that would restore @a state to initial
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| 132 | * conditions. The idea is that if a partial conversion occurs, then
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| 133 | * the converting the characters written by this function would leave
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| 134 | * the state in initial conditions, rather than partial conversion
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| 135 | * state. It does this by calling codecvt::do_unshift().
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| 136 | *
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| 137 | * For example, if 4 external characters always converted to 1 internal
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| 138 | * character, and input to in() had 6 external characters with state
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| 139 | * saved, this function would write two characters to the output and
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| 140 | * set the state to initialized conditions.
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| 141 | *
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| 142 | * The source and destination character sets are determined by the
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| 143 | * facet's locale, internal and external types.
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| 144 | *
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| 145 | * The result returned is a member of codecvt_base::result. If the
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| 146 | * state could be reset and data written, returns codecvt_base::ok. If
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| 147 | * no conversion is necessary, returns codecvt_base::noconv. If the
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| 148 | * output has insufficient space, returns codecvt_base::partial.
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| 149 | * Otherwise the reset failed and codecvt_base::error is returned.
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| 150 | *
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| 151 | * @param __state Persistent conversion state data.
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| 152 | * @param __to Start of output buffer.
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| 153 | * @param __to_end End of output buffer.
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| 154 | * @param __to_next Returns start of unused output area.
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| 155 | * @return codecvt_base::result.
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| 156 | */
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| 157 | result
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| 158 | unshift(state_type& __state, extern_type* __to, extern_type* __to_end,
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| 159 | extern_type*& __to_next) const
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| 160 | { return this->do_unshift(__state, __to,__to_end,__to_next); }
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| 161 |
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| 162 | /**
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| 163 | * @brief Convert from external to internal character set.
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| 164 | *
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| 165 | * Converts input string of extern_type to output string of
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| 166 | * intern_type. This is analogous to mbsrtowcs. It does this by
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| 167 | * calling codecvt::do_in.
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| 168 | *
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| 169 | * The source and destination character sets are determined by the
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| 170 | * facet's locale, internal and external types.
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| 171 | *
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| 172 | * The characters in [from,from_end) are converted and written to
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| 173 | * [to,to_end). from_next and to_next are set to point to the
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| 174 | * character following the last successfully converted character,
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| 175 | * respectively. If the result needed no conversion, from_next and
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| 176 | * to_next are not affected.
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| 177 | *
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| 178 | * The @a state argument should be initialized if the input is at the
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| 179 | * beginning and carried from a previous call if continuing
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| 180 | * conversion. There are no guarantees about how @a state is used.
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| 181 | *
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| 182 | * The result returned is a member of codecvt_base::result. If
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| 183 | * all the input is converted, returns codecvt_base::ok. If no
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| 184 | * conversion is necessary, returns codecvt_base::noconv. If
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| 185 | * the input ends early or there is insufficient space in the
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| 186 | * output, returns codecvt_base::partial. Otherwise the
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| 187 | * conversion failed and codecvt_base::error is returned.
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| 188 | *
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| 189 | * @param __state Persistent conversion state data.
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| 190 | * @param __from Start of input.
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| 191 | * @param __from_end End of input.
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| 192 | * @param __from_next Returns start of unconverted data.
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| 193 | * @param __to Start of output buffer.
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| 194 | * @param __to_end End of output buffer.
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| 195 | * @param __to_next Returns start of unused output area.
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| 196 | * @return codecvt_base::result.
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| 197 | */
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| 198 | result
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| 199 | in(state_type& __state, const extern_type* __from,
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| 200 | const extern_type* __from_end, const extern_type*& __from_next,
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| 201 | intern_type* __to, intern_type* __to_end,
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| 202 | intern_type*& __to_next) const
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| 203 | {
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| 204 | return this->do_in(__state, __from, __from_end, __from_next,
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| 205 | __to, __to_end, __to_next);
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| 206 | }
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| 207 |
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| 208 | int
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| 209 | encoding() const throw()
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| 210 | { return this->do_encoding(); }
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| 211 |
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| 212 | bool
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| 213 | always_noconv() const throw()
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| 214 | { return this->do_always_noconv(); }
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| 215 |
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| 216 | int
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| 217 | length(state_type& __state, const extern_type* __from,
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| 218 | const extern_type* __end, size_t __max) const
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| 219 | { return this->do_length(__state, __from, __end, __max); }
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| 220 |
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| 221 | int
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| 222 | max_length() const throw()
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| 223 | { return this->do_max_length(); }
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| 224 |
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| 225 | protected:
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| 226 | explicit
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| 227 | __codecvt_abstract_base(size_t __refs = 0) : locale::facet(__refs) { }
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| 228 |
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| 229 | virtual
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| 230 | ~__codecvt_abstract_base() { }
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| 231 |
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| 232 | /**
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| 233 | * @brief Convert from internal to external character set.
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| 234 | *
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| 235 | * Converts input string of intern_type to output string of
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| 236 | * extern_type. This function is a hook for derived classes to change
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| 237 | * the value returned. @see out for more information.
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| 238 | */
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| 239 | virtual result
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| 240 | do_out(state_type& __state, const intern_type* __from,
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| 241 | const intern_type* __from_end, const intern_type*& __from_next,
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| 242 | extern_type* __to, extern_type* __to_end,
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| 243 | extern_type*& __to_next) const = 0;
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| 244 |
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| 245 | virtual result
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| 246 | do_unshift(state_type& __state, extern_type* __to,
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| 247 | extern_type* __to_end, extern_type*& __to_next) const = 0;
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| 248 |
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| 249 | virtual result
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| 250 | do_in(state_type& __state, const extern_type* __from,
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| 251 | const extern_type* __from_end, const extern_type*& __from_next,
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| 252 | intern_type* __to, intern_type* __to_end,
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| 253 | intern_type*& __to_next) const = 0;
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| 254 |
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| 255 | virtual int
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| 256 | do_encoding() const throw() = 0;
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| 257 |
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| 258 | virtual bool
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| 259 | do_always_noconv() const throw() = 0;
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| 260 |
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| 261 | virtual int
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| 262 | do_length(state_type&, const extern_type* __from,
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| 263 | const extern_type* __end, size_t __max) const = 0;
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| 264 |
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| 265 | virtual int
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| 266 | do_max_length() const throw() = 0;
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| 267 | };
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| 268 |
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| 269 | /**
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| 270 | * @brief Primary class template codecvt.
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| 271 | * @ingroup locales
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| 272 | *
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| 273 | * NB: Generic, mostly useless implementation.
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| 274 | *
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| 275 | */
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| 276 | template<typename _InternT, typename _ExternT, typename _StateT>
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| 277 | class codecvt
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| 278 | : public __codecvt_abstract_base<_InternT, _ExternT, _StateT>
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| 279 | {
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| 280 | public:
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| 281 | // Types:
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| 282 | typedef codecvt_base::result result;
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| 283 | typedef _InternT intern_type;
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| 284 | typedef _ExternT extern_type;
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| 285 | typedef _StateT state_type;
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| 286 |
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| 287 | protected:
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| 288 | __c_locale _M_c_locale_codecvt;
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| 289 |
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| 290 | public:
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| 291 | static locale::id id;
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| 292 |
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| 293 | explicit
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| 294 | codecvt(size_t __refs = 0)
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| 295 | : __codecvt_abstract_base<_InternT, _ExternT, _StateT> (__refs),
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| 296 | _M_c_locale_codecvt(0)
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| 297 | { }
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| 298 |
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| 299 | explicit
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| 300 | codecvt(__c_locale __cloc, size_t __refs = 0);
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| 301 |
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| 302 | protected:
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| 303 | virtual
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| 304 | ~codecvt() { }
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| 305 |
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| 306 | virtual result
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| 307 | do_out(state_type& __state, const intern_type* __from,
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| 308 | const intern_type* __from_end, const intern_type*& __from_next,
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| 309 | extern_type* __to, extern_type* __to_end,
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| 310 | extern_type*& __to_next) const;
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| 311 |
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| 312 | virtual result
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| 313 | do_unshift(state_type& __state, extern_type* __to,
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| 314 | extern_type* __to_end, extern_type*& __to_next) const;
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| 315 |
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| 316 | virtual result
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| 317 | do_in(state_type& __state, const extern_type* __from,
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| 318 | const extern_type* __from_end, const extern_type*& __from_next,
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| 319 | intern_type* __to, intern_type* __to_end,
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| 320 | intern_type*& __to_next) const;
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| 321 |
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| 322 | virtual int
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| 323 | do_encoding() const throw();
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| 324 |
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| 325 | virtual bool
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| 326 | do_always_noconv() const throw();
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| 327 |
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| 328 | virtual int
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| 329 | do_length(state_type&, const extern_type* __from,
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| 330 | const extern_type* __end, size_t __max) const;
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| 331 |
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| 332 | virtual int
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| 333 | do_max_length() const throw();
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| 334 | };
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| 335 |
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| 336 | template<typename _InternT, typename _ExternT, typename _StateT>
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| 337 | locale::id codecvt<_InternT, _ExternT, _StateT>::id;
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| 338 |
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| 339 | /// class codecvt<char, char, mbstate_t> specialization.
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| 340 | template<>
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| 341 | class codecvt<char, char, mbstate_t>
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| 342 | : public __codecvt_abstract_base<char, char, mbstate_t>
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| 343 | {
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| 344 | friend class messages<char>;
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| 345 |
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| 346 | public:
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| 347 | // Types:
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| 348 | typedef char intern_type;
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| 349 | typedef char extern_type;
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| 350 | typedef mbstate_t state_type;
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| 351 |
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| 352 | protected:
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| 353 | __c_locale _M_c_locale_codecvt;
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| 354 |
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| 355 | public:
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| 356 | static locale::id id;
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| 357 |
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| 358 | explicit
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| 359 | codecvt(size_t __refs = 0);
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| 360 |
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| 361 | explicit
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| 362 | codecvt(__c_locale __cloc, size_t __refs = 0);
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| 363 |
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| 364 | protected:
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| 365 | virtual
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| 366 | ~codecvt();
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| 367 |
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| 368 | virtual result
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| 369 | do_out(state_type& __state, const intern_type* __from,
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| 370 | const intern_type* __from_end, const intern_type*& __from_next,
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| 371 | extern_type* __to, extern_type* __to_end,
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| 372 | extern_type*& __to_next) const;
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| 373 |
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| 374 | virtual result
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| 375 | do_unshift(state_type& __state, extern_type* __to,
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| 376 | extern_type* __to_end, extern_type*& __to_next) const;
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| 377 |
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| 378 | virtual result
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| 379 | do_in(state_type& __state, const extern_type* __from,
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| 380 | const extern_type* __from_end, const extern_type*& __from_next,
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| 381 | intern_type* __to, intern_type* __to_end,
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| 382 | intern_type*& __to_next) const;
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| 383 |
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| 384 | virtual int
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| 385 | do_encoding() const throw();
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| 386 |
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| 387 | virtual bool
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| 388 | do_always_noconv() const throw();
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| 389 |
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| 390 | virtual int
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| 391 | do_length(state_type&, const extern_type* __from,
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| 392 | const extern_type* __end, size_t __max) const;
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| 393 |
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| 394 | virtual int
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| 395 | do_max_length() const throw();
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| 396 | };
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| 397 |
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| 398 | #ifdef _GLIBCXX_USE_WCHAR_T
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| 399 | /** @brief Class codecvt<wchar_t, char, mbstate_t> specialization.
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| 400 | *
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| 401 | * Converts between narrow and wide characters in the native character set
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| 402 | */
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| 403 | template<>
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| 404 | class codecvt<wchar_t, char, mbstate_t>
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| 405 | : public __codecvt_abstract_base<wchar_t, char, mbstate_t>
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| 406 | {
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| 407 | friend class messages<wchar_t>;
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| 408 |
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| 409 | public:
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| 410 | // Types:
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| 411 | typedef wchar_t intern_type;
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| 412 | typedef char extern_type;
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| 413 | typedef mbstate_t state_type;
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| 414 |
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| 415 | protected:
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| 416 | __c_locale _M_c_locale_codecvt;
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| 417 |
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| 418 | public:
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| 419 | static locale::id id;
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| 420 |
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| 421 | explicit
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| 422 | codecvt(size_t __refs = 0);
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| 423 |
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| 424 | explicit
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| 425 | codecvt(__c_locale __cloc, size_t __refs = 0);
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| 426 |
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| 427 | protected:
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| 428 | virtual
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| 429 | ~codecvt();
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| 430 |
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| 431 | virtual result
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| 432 | do_out(state_type& __state, const intern_type* __from,
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| 433 | const intern_type* __from_end, const intern_type*& __from_next,
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| 434 | extern_type* __to, extern_type* __to_end,
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| 435 | extern_type*& __to_next) const;
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| 436 |
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| 437 | virtual result
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| 438 | do_unshift(state_type& __state,
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| 439 | extern_type* __to, extern_type* __to_end,
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| 440 | extern_type*& __to_next) const;
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| 441 |
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| 442 | virtual result
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| 443 | do_in(state_type& __state,
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| 444 | const extern_type* __from, const extern_type* __from_end,
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| 445 | const extern_type*& __from_next,
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| 446 | intern_type* __to, intern_type* __to_end,
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| 447 | intern_type*& __to_next) const;
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| 448 |
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| 449 | virtual
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| 450 | int do_encoding() const throw();
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| 451 |
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| 452 | virtual
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| 453 | bool do_always_noconv() const throw();
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| 454 |
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| 455 | virtual
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| 456 | int do_length(state_type&, const extern_type* __from,
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| 457 | const extern_type* __end, size_t __max) const;
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| 458 |
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| 459 | virtual int
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| 460 | do_max_length() const throw();
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| 461 | };
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| 462 | #endif //_GLIBCXX_USE_WCHAR_T
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| 463 |
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| 464 | #if __cplusplus >= 201103L
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| 465 | /** @brief Class codecvt<char16_t, char, mbstate_t> specialization.
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| 466 | *
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| 467 | * Converts between UTF-16 and UTF-8.
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| 468 | */
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| 469 | template<>
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| 470 | class codecvt<char16_t, char, mbstate_t>
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| 471 | : public __codecvt_abstract_base<char16_t, char, mbstate_t>
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| 472 | {
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| 473 | public:
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| 474 | // Types:
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| 475 | typedef char16_t intern_type;
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| 476 | typedef char extern_type;
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| 477 | typedef mbstate_t state_type;
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| 478 |
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| 479 | public:
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| 480 | static locale::id id;
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| 481 |
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| 482 | explicit
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| 483 | codecvt(size_t __refs = 0)
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| 484 | : __codecvt_abstract_base<char16_t, char, mbstate_t>(__refs) { }
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| 485 |
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| 486 | protected:
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| 487 | virtual
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| 488 | ~codecvt();
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| 489 |
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| 490 | virtual result
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| 491 | do_out(state_type& __state, const intern_type* __from,
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| 492 | const intern_type* __from_end, const intern_type*& __from_next,
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| 493 | extern_type* __to, extern_type* __to_end,
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| 494 | extern_type*& __to_next) const;
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| 495 |
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| 496 | virtual result
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| 497 | do_unshift(state_type& __state,
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| 498 | extern_type* __to, extern_type* __to_end,
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| 499 | extern_type*& __to_next) const;
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| 500 |
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| 501 | virtual result
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| 502 | do_in(state_type& __state,
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| 503 | const extern_type* __from, const extern_type* __from_end,
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| 504 | const extern_type*& __from_next,
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| 505 | intern_type* __to, intern_type* __to_end,
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| 506 | intern_type*& __to_next) const;
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| 507 |
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| 508 | virtual
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| 509 | int do_encoding() const throw();
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| 510 |
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| 511 | virtual
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| 512 | bool do_always_noconv() const throw();
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| 513 |
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| 514 | virtual
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| 515 | int do_length(state_type&, const extern_type* __from,
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| 516 | const extern_type* __end, size_t __max) const;
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| 517 |
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| 518 | virtual int
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| 519 | do_max_length() const throw();
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| 520 | };
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| 521 |
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| 522 | /** @brief Class codecvt<char32_t, char, mbstate_t> specialization.
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| 523 | *
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| 524 | * Converts between UTF-32 and UTF-8.
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| 525 | */
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| 526 | template<>
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| 527 | class codecvt<char32_t, char, mbstate_t>
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| 528 | : public __codecvt_abstract_base<char32_t, char, mbstate_t>
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| 529 | {
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| 530 | public:
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| 531 | // Types:
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| 532 | typedef char32_t intern_type;
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| 533 | typedef char extern_type;
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| 534 | typedef mbstate_t state_type;
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| 535 |
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| 536 | public:
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| 537 | static locale::id id;
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| 538 |
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| 539 | explicit
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| 540 | codecvt(size_t __refs = 0)
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| 541 | : __codecvt_abstract_base<char32_t, char, mbstate_t>(__refs) { }
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| 542 |
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| 543 | protected:
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| 544 | virtual
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| 545 | ~codecvt();
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| 546 |
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| 547 | virtual result
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| 548 | do_out(state_type& __state, const intern_type* __from,
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| 549 | const intern_type* __from_end, const intern_type*& __from_next,
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| 550 | extern_type* __to, extern_type* __to_end,
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| 551 | extern_type*& __to_next) const;
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| 552 |
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| 553 | virtual result
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| 554 | do_unshift(state_type& __state,
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| 555 | extern_type* __to, extern_type* __to_end,
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| 556 | extern_type*& __to_next) const;
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| 557 |
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| 558 | virtual result
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| 559 | do_in(state_type& __state,
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| 560 | const extern_type* __from, const extern_type* __from_end,
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| 561 | const extern_type*& __from_next,
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| 562 | intern_type* __to, intern_type* __to_end,
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| 563 | intern_type*& __to_next) const;
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| 564 |
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| 565 | virtual
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| 566 | int do_encoding() const throw();
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| 567 |
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| 568 | virtual
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| 569 | bool do_always_noconv() const throw();
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| 570 |
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| 571 | virtual
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| 572 | int do_length(state_type&, const extern_type* __from,
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| 573 | const extern_type* __end, size_t __max) const;
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| 574 |
|
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| 575 | virtual int
|
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| 576 | do_max_length() const throw();
|
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| 577 | };
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| 578 |
|
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| 579 | #ifdef _GLIBCXX_USE_CHAR8_T
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| 580 | /** @brief Class codecvt<char16_t, char8_t, mbstate_t> specialization.
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| 581 | *
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| 582 | * Converts between UTF-16 and UTF-8.
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| 583 | */
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| 584 | template<>
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| 585 | class codecvt<char16_t, char8_t, mbstate_t>
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| 586 | : public __codecvt_abstract_base<char16_t, char8_t, mbstate_t>
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| 587 | {
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| 588 | public:
|
|---|
| 589 | // Types:
|
|---|
| 590 | typedef char16_t intern_type;
|
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| 591 | typedef char8_t extern_type;
|
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| 592 | typedef mbstate_t state_type;
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| 593 |
|
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| 594 | public:
|
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| 595 | static locale::id id;
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| 596 |
|
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| 597 | explicit
|
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| 598 | codecvt(size_t __refs = 0)
|
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| 599 | : __codecvt_abstract_base<char16_t, char8_t, mbstate_t>(__refs) { }
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| 600 |
|
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| 601 | protected:
|
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| 602 | virtual
|
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| 603 | ~codecvt();
|
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| 604 |
|
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| 605 | virtual result
|
|---|
| 606 | do_out(state_type& __state, const intern_type* __from,
|
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| 607 | const intern_type* __from_end, const intern_type*& __from_next,
|
|---|
| 608 | extern_type* __to, extern_type* __to_end,
|
|---|
| 609 | extern_type*& __to_next) const;
|
|---|
| 610 |
|
|---|
| 611 | virtual result
|
|---|
| 612 | do_unshift(state_type& __state,
|
|---|
| 613 | extern_type* __to, extern_type* __to_end,
|
|---|
| 614 | extern_type*& __to_next) const;
|
|---|
| 615 |
|
|---|
| 616 | virtual result
|
|---|
| 617 | do_in(state_type& __state,
|
|---|
| 618 | const extern_type* __from, const extern_type* __from_end,
|
|---|
| 619 | const extern_type*& __from_next,
|
|---|
| 620 | intern_type* __to, intern_type* __to_end,
|
|---|
| 621 | intern_type*& __to_next) const;
|
|---|
| 622 |
|
|---|
| 623 | virtual
|
|---|
| 624 | int do_encoding() const throw();
|
|---|
| 625 |
|
|---|
| 626 | virtual
|
|---|
| 627 | bool do_always_noconv() const throw();
|
|---|
| 628 |
|
|---|
| 629 | virtual
|
|---|
| 630 | int do_length(state_type&, const extern_type* __from,
|
|---|
| 631 | const extern_type* __end, size_t __max) const;
|
|---|
| 632 |
|
|---|
| 633 | virtual int
|
|---|
| 634 | do_max_length() const throw();
|
|---|
| 635 | };
|
|---|
| 636 |
|
|---|
| 637 | /** @brief Class codecvt<char32_t, char8_t, mbstate_t> specialization.
|
|---|
| 638 | *
|
|---|
| 639 | * Converts between UTF-32 and UTF-8.
|
|---|
| 640 | */
|
|---|
| 641 | template<>
|
|---|
| 642 | class codecvt<char32_t, char8_t, mbstate_t>
|
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| 643 | : public __codecvt_abstract_base<char32_t, char8_t, mbstate_t>
|
|---|
| 644 | {
|
|---|
| 645 | public:
|
|---|
| 646 | // Types:
|
|---|
| 647 | typedef char32_t intern_type;
|
|---|
| 648 | typedef char8_t extern_type;
|
|---|
| 649 | typedef mbstate_t state_type;
|
|---|
| 650 |
|
|---|
| 651 | public:
|
|---|
| 652 | static locale::id id;
|
|---|
| 653 |
|
|---|
| 654 | explicit
|
|---|
| 655 | codecvt(size_t __refs = 0)
|
|---|
| 656 | : __codecvt_abstract_base<char32_t, char8_t, mbstate_t>(__refs) { }
|
|---|
| 657 |
|
|---|
| 658 | protected:
|
|---|
| 659 | virtual
|
|---|
| 660 | ~codecvt();
|
|---|
| 661 |
|
|---|
| 662 | virtual result
|
|---|
| 663 | do_out(state_type& __state, const intern_type* __from,
|
|---|
| 664 | const intern_type* __from_end, const intern_type*& __from_next,
|
|---|
| 665 | extern_type* __to, extern_type* __to_end,
|
|---|
| 666 | extern_type*& __to_next) const;
|
|---|
| 667 |
|
|---|
| 668 | virtual result
|
|---|
| 669 | do_unshift(state_type& __state,
|
|---|
| 670 | extern_type* __to, extern_type* __to_end,
|
|---|
| 671 | extern_type*& __to_next) const;
|
|---|
| 672 |
|
|---|
| 673 | virtual result
|
|---|
| 674 | do_in(state_type& __state,
|
|---|
| 675 | const extern_type* __from, const extern_type* __from_end,
|
|---|
| 676 | const extern_type*& __from_next,
|
|---|
| 677 | intern_type* __to, intern_type* __to_end,
|
|---|
| 678 | intern_type*& __to_next) const;
|
|---|
| 679 |
|
|---|
| 680 | virtual
|
|---|
| 681 | int do_encoding() const throw();
|
|---|
| 682 |
|
|---|
| 683 | virtual
|
|---|
| 684 | bool do_always_noconv() const throw();
|
|---|
| 685 |
|
|---|
| 686 | virtual
|
|---|
| 687 | int do_length(state_type&, const extern_type* __from,
|
|---|
| 688 | const extern_type* __end, size_t __max) const;
|
|---|
| 689 |
|
|---|
| 690 | virtual int
|
|---|
| 691 | do_max_length() const throw();
|
|---|
| 692 | };
|
|---|
| 693 | #endif // _GLIBCXX_USE_CHAR8_T
|
|---|
| 694 |
|
|---|
| 695 | #endif // C++11
|
|---|
| 696 |
|
|---|
| 697 | /// class codecvt_byname [22.2.1.6].
|
|---|
| 698 | template<typename _InternT, typename _ExternT, typename _StateT>
|
|---|
| 699 | class codecvt_byname : public codecvt<_InternT, _ExternT, _StateT>
|
|---|
| 700 | {
|
|---|
| 701 | public:
|
|---|
| 702 | explicit
|
|---|
| 703 | codecvt_byname(const char* __s, size_t __refs = 0)
|
|---|
| 704 | : codecvt<_InternT, _ExternT, _StateT>(__refs)
|
|---|
| 705 | {
|
|---|
| 706 | if (__builtin_strcmp(__s, "C") != 0
|
|---|
| 707 | && __builtin_strcmp(__s, "POSIX") != 0)
|
|---|
| 708 | {
|
|---|
| 709 | this->_S_destroy_c_locale(this->_M_c_locale_codecvt);
|
|---|
| 710 | this->_S_create_c_locale(this->_M_c_locale_codecvt, __s);
|
|---|
| 711 | }
|
|---|
| 712 | }
|
|---|
| 713 |
|
|---|
| 714 | #if __cplusplus >= 201103L
|
|---|
| 715 | explicit
|
|---|
| 716 | codecvt_byname(const string& __s, size_t __refs = 0)
|
|---|
| 717 | : codecvt_byname(__s.c_str(), __refs) { }
|
|---|
| 718 | #endif
|
|---|
| 719 |
|
|---|
| 720 | protected:
|
|---|
| 721 | virtual
|
|---|
| 722 | ~codecvt_byname() { }
|
|---|
| 723 | };
|
|---|
| 724 |
|
|---|
| 725 | #if __cplusplus >= 201103L
|
|---|
| 726 | template<>
|
|---|
| 727 | class codecvt_byname<char16_t, char, mbstate_t>
|
|---|
| 728 | : public codecvt<char16_t, char, mbstate_t>
|
|---|
| 729 | {
|
|---|
| 730 | public:
|
|---|
| 731 | explicit
|
|---|
| 732 | codecvt_byname(const char*, size_t __refs = 0)
|
|---|
| 733 | : codecvt<char16_t, char, mbstate_t>(__refs) { }
|
|---|
| 734 |
|
|---|
| 735 | explicit
|
|---|
| 736 | codecvt_byname(const string& __s, size_t __refs = 0)
|
|---|
| 737 | : codecvt_byname(__s.c_str(), __refs) { }
|
|---|
| 738 |
|
|---|
| 739 | protected:
|
|---|
| 740 | virtual
|
|---|
| 741 | ~codecvt_byname() { }
|
|---|
| 742 | };
|
|---|
| 743 |
|
|---|
| 744 | template<>
|
|---|
| 745 | class codecvt_byname<char32_t, char, mbstate_t>
|
|---|
| 746 | : public codecvt<char32_t, char, mbstate_t>
|
|---|
| 747 | {
|
|---|
| 748 | public:
|
|---|
| 749 | explicit
|
|---|
| 750 | codecvt_byname(const char*, size_t __refs = 0)
|
|---|
| 751 | : codecvt<char32_t, char, mbstate_t>(__refs) { }
|
|---|
| 752 |
|
|---|
| 753 | explicit
|
|---|
| 754 | codecvt_byname(const string& __s, size_t __refs = 0)
|
|---|
| 755 | : codecvt_byname(__s.c_str(), __refs) { }
|
|---|
| 756 |
|
|---|
| 757 | protected:
|
|---|
| 758 | virtual
|
|---|
| 759 | ~codecvt_byname() { }
|
|---|
| 760 | };
|
|---|
| 761 |
|
|---|
| 762 | #if defined(_GLIBCXX_USE_CHAR8_T)
|
|---|
| 763 | template<>
|
|---|
| 764 | class codecvt_byname<char16_t, char8_t, mbstate_t>
|
|---|
| 765 | : public codecvt<char16_t, char8_t, mbstate_t>
|
|---|
| 766 | {
|
|---|
| 767 | public:
|
|---|
| 768 | explicit
|
|---|
| 769 | codecvt_byname(const char*, size_t __refs = 0)
|
|---|
| 770 | : codecvt<char16_t, char8_t, mbstate_t>(__refs) { }
|
|---|
| 771 |
|
|---|
| 772 | explicit
|
|---|
| 773 | codecvt_byname(const string& __s, size_t __refs = 0)
|
|---|
| 774 | : codecvt_byname(__s.c_str(), __refs) { }
|
|---|
| 775 |
|
|---|
| 776 | protected:
|
|---|
| 777 | virtual
|
|---|
| 778 | ~codecvt_byname() { }
|
|---|
| 779 | };
|
|---|
| 780 |
|
|---|
| 781 | template<>
|
|---|
| 782 | class codecvt_byname<char32_t, char8_t, mbstate_t>
|
|---|
| 783 | : public codecvt<char32_t, char8_t, mbstate_t>
|
|---|
| 784 | {
|
|---|
| 785 | public:
|
|---|
| 786 | explicit
|
|---|
| 787 | codecvt_byname(const char*, size_t __refs = 0)
|
|---|
| 788 | : codecvt<char32_t, char8_t, mbstate_t>(__refs) { }
|
|---|
| 789 |
|
|---|
| 790 | explicit
|
|---|
| 791 | codecvt_byname(const string& __s, size_t __refs = 0)
|
|---|
| 792 | : codecvt_byname(__s.c_str(), __refs) { }
|
|---|
| 793 |
|
|---|
| 794 | protected:
|
|---|
| 795 | virtual
|
|---|
| 796 | ~codecvt_byname() { }
|
|---|
| 797 | };
|
|---|
| 798 | #endif
|
|---|
| 799 |
|
|---|
| 800 | #endif // C++11
|
|---|
| 801 |
|
|---|
| 802 | // Inhibit implicit instantiations for required instantiations,
|
|---|
| 803 | // which are defined via explicit instantiations elsewhere.
|
|---|
| 804 | #if _GLIBCXX_EXTERN_TEMPLATE
|
|---|
| 805 | extern template class codecvt_byname<char, char, mbstate_t>;
|
|---|
| 806 |
|
|---|
| 807 | extern template
|
|---|
| 808 | const codecvt<char, char, mbstate_t>&
|
|---|
| 809 | use_facet<codecvt<char, char, mbstate_t> >(const locale&);
|
|---|
| 810 |
|
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| 811 | extern template
|
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| 812 | bool
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|---|
| 813 | has_facet<codecvt<char, char, mbstate_t> >(const locale&);
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|---|
| 814 |
|
|---|
| 815 | #ifdef _GLIBCXX_USE_WCHAR_T
|
|---|
| 816 | extern template class codecvt_byname<wchar_t, char, mbstate_t>;
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|---|
| 817 |
|
|---|
| 818 | extern template
|
|---|
| 819 | const codecvt<wchar_t, char, mbstate_t>&
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|---|
| 820 | use_facet<codecvt<wchar_t, char, mbstate_t> >(const locale&);
|
|---|
| 821 |
|
|---|
| 822 | extern template
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|---|
| 823 | bool
|
|---|
| 824 | has_facet<codecvt<wchar_t, char, mbstate_t> >(const locale&);
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|---|
| 825 | #endif
|
|---|
| 826 |
|
|---|
| 827 | #if __cplusplus >= 201103L
|
|---|
| 828 | extern template class codecvt_byname<char16_t, char, mbstate_t>;
|
|---|
| 829 | extern template class codecvt_byname<char32_t, char, mbstate_t>;
|
|---|
| 830 |
|
|---|
| 831 | #if defined(_GLIBCXX_USE_CHAR8_T)
|
|---|
| 832 | extern template class codecvt_byname<char16_t, char8_t, mbstate_t>;
|
|---|
| 833 | extern template class codecvt_byname<char32_t, char8_t, mbstate_t>;
|
|---|
| 834 | #endif
|
|---|
| 835 |
|
|---|
| 836 | #endif
|
|---|
| 837 |
|
|---|
| 838 | #endif
|
|---|
| 839 |
|
|---|
| 840 | _GLIBCXX_END_NAMESPACE_VERSION
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| 841 | } // namespace std
|
|---|
| 842 |
|
|---|
| 843 | #endif // _CODECVT_H
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