dolphin/Source/Core/Common/CommonFuncs.cpp

49 lines
1.5 KiB
C++

// Copyright 2009 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
// The code in GetErrorMessage can't handle some systems having the
// GNU version of strerror_r and other systems having the XSI version,
// so we undefine _GNU_SOURCE here in an attempt to always get the XSI version.
// We include cstring before all other headers in case cstring is included
// indirectly (without undefining _GNU_SOURCE) by some other header.
#ifdef _GNU_SOURCE
#undef _GNU_SOURCE
#include <cstring>
#define _GNU_SOURCE
#else
#include <cstring>
#endif
#include <cstddef>
#include <errno.h>
#include "Common/CommonFuncs.h"
#ifdef _WIN32
#include <windows.h>
#endif
// Generic function to get last error message.
// Call directly after the command or use the error num.
// This function might change the error code.
std::string GetLastErrorMsg()
{
const size_t buff_size = 256;
char err_str[buff_size];
#ifdef _WIN32
FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), err_str, buff_size, nullptr);
#else
// We assume that the XSI-compliant version of strerror_r (returns int) is used
// rather than the GNU version (returns char*). The returned value is stored to
// an int variable to get a compile-time check that the return type is not char*.
const int result = strerror_r(errno, err_str, buff_size);
if (result != 0)
return "";
#endif
return std::string(err_str);
}