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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___LOCALE_DIR_MESSAGES_H10#define _LIBCPP___LOCALE_DIR_MESSAGES_H11 12#include <__config>13#include <__iterator/back_insert_iterator.h>14#include <__locale>15#include <string>16 17#if _LIBCPP_HAS_LOCALIZATION18 19# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)20# pragma GCC system_header21# endif22 23# if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))24// Most unix variants have catopen. These are the specific ones that don't.25# if !defined(__BIONIC__) && !_LIBCPP_LIBC_NEWLIB && !defined(__EMSCRIPTEN__)26# define _LIBCPP_HAS_CATOPEN 127# include <nl_types.h>28# else29# define _LIBCPP_HAS_CATOPEN 030# endif31# else32# define _LIBCPP_HAS_CATOPEN 033# endif34 35_LIBCPP_BEGIN_NAMESPACE_STD36 37class _LIBCPP_EXPORTED_FROM_ABI messages_base {38public:39 typedef intptr_t catalog;40 41 _LIBCPP_HIDE_FROM_ABI messages_base() {}42};43 44template <class _CharT>45class messages : public locale::facet, public messages_base {46public:47 typedef _CharT char_type;48 typedef basic_string<_CharT> string_type;49 50 _LIBCPP_HIDE_FROM_ABI explicit messages(size_t __refs = 0) : locale::facet(__refs) {}51 52 _LIBCPP_HIDE_FROM_ABI catalog open(const basic_string<char>& __nm, const locale& __loc) const {53 return do_open(__nm, __loc);54 }55 56 _LIBCPP_HIDE_FROM_ABI string_type get(catalog __c, int __set, int __msgid, const string_type& __dflt) const {57 return do_get(__c, __set, __msgid, __dflt);58 }59 60 _LIBCPP_HIDE_FROM_ABI void close(catalog __c) const { do_close(__c); }61 62 static locale::id id;63 64protected:65 _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages() override {}66 67 virtual catalog do_open(const basic_string<char>&, const locale&) const;68 virtual string_type do_get(catalog, int __set, int __msgid, const string_type& __dflt) const;69 virtual void do_close(catalog) const;70};71 72template <class _CharT>73locale::id messages<_CharT>::id;74 75template <class _CharT>76typename messages<_CharT>::catalog messages<_CharT>::do_open(const basic_string<char>& __nm, const locale&) const {77# if _LIBCPP_HAS_CATOPEN78 return (catalog)catopen(__nm.c_str(), NL_CAT_LOCALE);79# else // !_LIBCPP_HAS_CATOPEN80 (void)__nm;81 return -1;82# endif // _LIBCPP_HAS_CATOPEN83}84 85template <class _CharT>86typename messages<_CharT>::string_type87messages<_CharT>::do_get(catalog __c, int __set, int __msgid, const string_type& __dflt) const {88# if _LIBCPP_HAS_CATOPEN89 string __ndflt;90 __narrow_to_utf8<sizeof(char_type) * __CHAR_BIT__>()(91 std::back_inserter(__ndflt), __dflt.c_str(), __dflt.c_str() + __dflt.size());92 nl_catd __cat = (nl_catd)__c;93 static_assert(sizeof(catalog) >= sizeof(nl_catd), "Unexpected nl_catd type");94 char* __n = catgets(__cat, __set, __msgid, __ndflt.c_str());95 string_type __w;96 __widen_from_utf8<sizeof(char_type) * __CHAR_BIT__>()(std::back_inserter(__w), __n, __n + std::strlen(__n));97 return __w;98# else // !_LIBCPP_HAS_CATOPEN99 (void)__c;100 (void)__set;101 (void)__msgid;102 return __dflt;103# endif // _LIBCPP_HAS_CATOPEN104}105 106template <class _CharT>107void messages<_CharT>::do_close(catalog __c) const {108# if _LIBCPP_HAS_CATOPEN109 catclose((nl_catd)__c);110# else // !_LIBCPP_HAS_CATOPEN111 (void)__c;112# endif // _LIBCPP_HAS_CATOPEN113}114 115extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<char>;116# if _LIBCPP_HAS_WIDE_CHARACTERS117extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<wchar_t>;118# endif119 120template <class _CharT>121class messages_byname : public messages<_CharT> {122public:123 typedef messages_base::catalog catalog;124 typedef basic_string<_CharT> string_type;125 126 _LIBCPP_HIDE_FROM_ABI explicit messages_byname(const char*, size_t __refs = 0) : messages<_CharT>(__refs) {}127 128 _LIBCPP_HIDE_FROM_ABI explicit messages_byname(const string&, size_t __refs = 0) : messages<_CharT>(__refs) {}129 130protected:131 _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages_byname() override {}132};133 134extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<char>;135# if _LIBCPP_HAS_WIDE_CHARACTERS136extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<wchar_t>;137# endif138 139_LIBCPP_END_NAMESPACE_STD140 141#endif // _LIBCPP_HAS_LOCALIZATION142 143#endif // _LIBCPP___LOCALE_DIR_MESSAGES_H144