win-utils.hpp

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#pragma once
#include "include/win.hpp"
#include "library-pch.hpp"
 
namespace mal_toolkit
{
    inline std::string wstring_to_string(std::wstring_view const wstr)
    {
        if (wstr.empty())
            return std::string();
        int size = WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), NULL, 0, NULL, NULL);
        std::string rv(size, 0);
        WideCharToMultiByte(CP_UTF8, 0, wstr.data(), (int)wstr.size(), rv.data(), size, NULL, NULL);
        return rv;
    }
 
    inline std::wstring string_to_wstring(std::string_view const str)
    {
        if (str.empty())
            return std::wstring();
        int size = MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), NULL, 0);
        std::wstring rv(size, 0);
        MultiByteToWideChar(CP_UTF8, 0, str.data(), (int)str.size(), rv.data(), size);
        return rv;
    }
 
    inline std::string FormatErrorAsString(DWORD errorMessageID)
    {
        if (errorMessageID == 0)
        {
            return std::string();  // No error message has been recorded
        }
 
        LPSTR messageBuffer = nullptr;
 
        // Ask Win32 to give us the string version of that message ID.
        // The parameters we pass in, tell Win32 to create the buffer that holds the message for us
        // (because we don't yet know how long the message string will be).
        size_t size = FormatMessageA(
            FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
            errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
 
        // Copy the error message into a std::string.
        std::string message(messageBuffer, size);
 
        // Free the Win32's string's buffer.
        LocalFree(messageBuffer);
        return message.substr(0, message.find_last_of("\n", std::max(0ull, message.size() - 5)));
    }
}  // namespace mal_toolkit