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device: Ledger - fix wide char hidapi error string conversion

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This commit is contained in:
xiphon 2020-02-29 22:46:19 +00:00
parent 6b2b1d6368
commit 6e1cb5a4d0
1 changed files with 14 additions and 2 deletions
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16
src/device/device_io_hid.cpp
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@ -44,8 +44,20 @@ namespace hw {
static std::string safe_hid_error(hid_device *hwdev) {
if (hwdev) {
const char* error_str = (const char*)hid_error(hwdev);
return std::string(error_str == nullptr ? "Unknown error" : error_str);
const wchar_t* error_wstr = hid_error(hwdev);
if (error_wstr == nullptr)
{
return "Unknown error";
}
std::mbstate_t state{};
const size_t len_symbols = std::wcsrtombs(nullptr, &error_wstr, 0, &state);
if (len_symbols == static_cast<std::size_t>(-1))
{
return "Failed to convert wide char error";
}
std::string error_str(len_symbols + 1, 0);
std::wcsrtombs(&error_str[0], &error_wstr, error_str.size(), &state);
return error_str;
}
return std::string("NULL device");
}