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<system_error>: explicitly pass the system locale ID for system_category messages #2669

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merged 3 commits into from
May 1, 2022
Merged

<system_error>: explicitly pass the system locale ID for system_category messages #2669

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200e8f8
explicitly pass the system locale ID
fsb4000 Apr 24, 2022
80e182f
use GetLocaleInfoEx instead of GetSystemDefaultLangID
fsb4000 Apr 28, 2022
0835414
move a comment to the top.
fsb4000 Apr 28, 2022
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8 changes: 7 additions & 1 deletion stl/src/syserror_import_lib.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -45,9 +45,15 @@ _NODISCARD size_t __CLRCALL_PURE_OR_STDCALL __std_system_error_allocate_message(
// convert to name of Windows error, return 0 for failure, otherwise return number of chars in buffer
// __std_system_error_deallocate_message should be called even if 0 is returned
// pre: *_Ptr_str == nullptr
DWORD _Lang_id;
const int _Ret = GetLocaleInfoEx(LOCALE_NAME_SYSTEM_DEFAULT, LOCALE_ILANGUAGE | LOCALE_RETURN_NUMBER,
reinterpret_cast<LPWSTR>(&_Lang_id), sizeof(_Lang_id) / sizeof(wchar_t));
if (_Ret == 0) {
_Lang_id = 0;
}
const unsigned long _Chars =
FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, _Message_id, 0, reinterpret_cast<char*>(_Ptr_str), 0, nullptr);
nullptr, _Message_id, _Lang_id, reinterpret_cast<char*>(_Ptr_str), 0, nullptr);

return _CSTD __std_get_string_size_without_trailing_whitespace(*_Ptr_str, _Chars);
}
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