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a743e496c5
* Changes to fix warning 26493 on src/common It will be multi PR change. This does not turn on the rule but fix the code under src/commom * int cast
51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
#pragma once
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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#include <optional>
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#include <string>
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#include <system_error>
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#include <strsafe.h>
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inline std::optional<std::wstring> get_last_error_message(const DWORD dw)
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{
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std::optional<std::wstring> message;
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try
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{
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const auto msg = std::system_category().message(dw);
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message.emplace(begin(msg), end(msg));
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}
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catch (...)
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{
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}
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return message;
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}
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inline std::wstring get_last_error_or_default(const DWORD dw)
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{
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auto message = get_last_error_message(dw);
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return message.has_value() ? *message : L"";
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}
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inline void show_last_error_message(const wchar_t* functionName, DWORD dw, const wchar_t* errorTitle)
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{
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const auto system_message = get_last_error_message(dw);
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if (!system_message.has_value())
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{
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return;
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}
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LPWSTR lpDisplayBuf = static_cast<LPWSTR>(LocalAlloc(LMEM_ZEROINIT, (system_message->size() + lstrlenW(functionName) + 40) * sizeof(WCHAR)));
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if (lpDisplayBuf != NULL)
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{
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StringCchPrintfW(lpDisplayBuf,
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LocalSize(lpDisplayBuf) / sizeof(WCHAR),
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L"%s: %s (%d)",
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functionName,
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system_message->c_str(),
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dw);
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MessageBoxW(NULL, lpDisplayBuf, errorTitle, MB_OK | MB_ICONERROR);
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LocalFree(lpDisplayBuf);
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}
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}
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