/////////////////////////////////////////////////////////////////////// // WindowsHelper.cpp - small helper functions for using Windows API // // ver 1.0 // //-------------------------------------------------------------------// // Jim Fawcett (c) copyright 2015 // // All rights granted provided this copyright notice is retained // //-------------------------------------------------------------------// // Language: C++, Visual Studio 2015 // // Application: Several Projects, CSE687 - Object Oriented Design // // Author: Jim Fawcett, Syracuse University, CST 4-187 // // jfawcett@twcny.rr.com // /////////////////////////////////////////////////////////////////////// #define WIN32_LEAN_AND_MEAN #include #include #include #include "WindowsHelpers.h" using namespace WindowsHelpers; #pragma comment(lib, "Ws2_32.lib") std::string WindowsHelpers::wstringToString(const std::wstring& wstr) { std::string rtn; for (auto ch : wstr) rtn += static_cast(ch); rtn += '\0'; return rtn; } std::wstring WindowsHelpers::stringToWideString(const std::string& str) { std::wstring rtn; for (auto ch : str) rtn += ch; rtn += static_cast('\0'); return rtn; } //----< get socket error message string >---------------------------- std::string WindowsHelpers::GetLastMsg(bool WantSocketMsg) { // ask system what type of error occurred DWORD errorCode; if (WantSocketMsg) errorCode = WSAGetLastError(); else errorCode = GetLastError(); if (errorCode == 0) return "no error"; // map errorCode into a system defined error string DWORD dwFlags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER; LPCVOID lpSource = NULL; DWORD dwMessageID = errorCode; DWORD dwLanguageId = MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US); LPSTR lpBuffer; DWORD nSize = 0; va_list *Arguments = NULL; FormatMessage( dwFlags, lpSource, dwMessageID, dwLanguageId, (LPTSTR)&lpBuffer, nSize, Arguments ); std::string _msg(lpBuffer); LocalFree(lpBuffer); return _msg; } #ifdef TEST_WINDOWSHELPERS int main() { } #endif
