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#pragma once
// ------------------------------------------------------------------------------------------
// Structure and operators to insert a zero-filled hex-formatted number into a std::ostream.
struct HEX
{
HEX(unsigned long num, unsigned long fieldwidth = 8, bool bUpcase = false)
: m_num(num), m_width(fieldwidth), m_upcase(bUpcase)
{}
unsigned long m_num;
unsigned long m_width;
bool m_upcase;
};
inline std::ostream& operator << ( std::ostream& os, const HEX & h )
{
int fmt = os.flags();
char fillchar = os.fill('0');
os << "0x" << std::hex << (h.m_upcase ? std::uppercase : std::nouppercase) << std::setw(h.m_width) << h.m_num ;
os.fill(fillchar);
os.flags(fmt);
return os;
}
inline std::wostream& operator << ( std::wostream& os, const HEX & h )
{
int fmt = os.flags();
wchar_t fillchar = os.fill(L'0');
os << L"0x" << std::hex << (h.m_upcase ? std::uppercase : std::nouppercase) << std::setw(h.m_width) << h.m_num ;
os.fill(fillchar);
os.flags(fmt);
return os;
}
// ------------------------------------------------------------------------------------------
// Convert an error code to corresponding text, returning it as a std::wstring.
inline std::wstring SysErrorMessageWithCode(DWORD dwErrCode /*= GetLastError()*/)
{
LPWSTR pszErrMsg = NULL;
std::wstringstream sRetval;
DWORD flags =
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_FROM_SYSTEM ;
if ( FormatMessageW(
flags,
NULL,
dwErrCode,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPWSTR) &pszErrMsg,
0,
NULL ) )
{
sRetval << pszErrMsg << L" (Error # " << dwErrCode << L" = " << HEX(dwErrCode) << L")";
LocalFree(pszErrMsg);
}
else
{
sRetval << L"Error # " << dwErrCode << L" (" << HEX(dwErrCode) << L")";
}
return sRetval.str();
}
// Convert std::string to std::wstring
std::wstring s2ws(const std::string& s)
{
int len;
int slength = (int)s.length() + 1;
len = MultiByteToWideChar(CP_UTF8, 0, s.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_UTF8, 0, s.c_str(), slength, buf, len);
std::wstring r(buf);
delete[] buf;
return r;
}
// Convert std::wstring to std::string
std::string ws2s(const std::wstring& s)
{
int len;
int slength = (int)s.length() + 1;
len = WideCharToMultiByte(CP_UTF8, 0, s.c_str(), slength, 0, 0, 0, 0);
char* buf = new char[len];
WideCharToMultiByte(CP_UTF8, 0, s.c_str(), slength, buf, len, 0, 0);
std::string r(buf);
delete[] buf;
return r;
}
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