Zstring makeUpperCopy(const Zstring& str)
{
const size_t len = str.size();
Zstring output;
output.resize(len);
std::transform(str.begin(), str.end(), output.begin(), [](char c) {
return static_cast<char>(::toupper(static_cast<unsigned char>(c)));
}); //locale-dependent!
//result of toupper() is an unsigned char mapped to int range, so the char representation is in the last 8 bits and we need not care about signedness!
//this should work for UTF-8, too: all chars >= 128 are mapped upon themselves!
return output;
}
Zstring makeUpperCopy(const Zstring& str)
{
const int len = static_cast<int>(str.size());
if (len == 0) //LCMapString does not allow input sizes of 0!
return str;
Zstring output = str;
//LOCALE_INVARIANT is NOT available with Windows 2000 -> ok
//use Windows' upper case conversion: faster than ::CharUpper()
if (::LCMapString(LOCALE_INVARIANT, //__in LCID Locale,
LCMAP_UPPERCASE, //__in DWORD dwMapFlags,
str.c_str(), //__in LPCTSTR lpSrcStr,
len, //__in int cchSrc,
&*output.begin(), //__out LPTSTR lpDestStr,
len) == 0) //__in int cchDest
throw std::runtime_error("Error comparing strings (LCMapString). " + std::string(__FILE__) + ":" + numberTo<std::string>(__LINE__));
return output;
}