void AppendCharIfAbsent(
std::basic_string<_Elem, _Traits, _Ax>& str,
_Elem c)
{
typedef std::basic_string<_Elem, _Traits, _Ax> string_type;
string_type::reverse_iterator r_iter = str.rbegin();
if(*r_iter != c)
str.append(1, c);
}
std::basic_string<Char> PathJoin(const std::basic_string<Char>& dir, const std::basic_string<Char>& file)
{
if(dir.empty()) return file;
Char c = *(dir.rbegin());
switch(c)
{
case '\\':
case '/':
return dir + file;
}
std::basic_string<Char> ret(dir);
ret.push_back('\\');
ret.append(file);
return ret;
}