// Convert an absolute path to a path that's relative to "&relativeTo".
PathString PathString::AbsolutePathToRelative(const PathString &relativeTo) const
//-------------------------------------------------------------------------------
{
mpt::PathString result = path;
if(path.empty())
{
return result;
}
if(!_wcsnicmp(relativeTo.AsNative().c_str(), AsNative().c_str(), relativeTo.AsNative().length()))
{
// Path is OpenMPT's directory or a sub directory ("C:\OpenMPT\Somepath" => ".\Somepath")
result = MPT_PATHSTRING(".\\"); // ".\"
result += mpt::PathString::FromNative(AsNative().substr(relativeTo.AsNative().length()));
} else if(!_wcsnicmp(relativeTo.AsNative().c_str(), AsNative().c_str(), 2))
{
// Path is on the same drive as OpenMPT ("C:\Somepath" => "\Somepath")
result = mpt::PathString::FromNative(AsNative().substr(2));
}
return result;
}
// Convert a path that is relative to "&relativeTo" to an absolute path.
PathString PathString::RelativePathToAbsolute(const PathString &relativeTo) const
//-------------------------------------------------------------------------------
{
mpt::PathString result = path;
if(path.empty())
{
return result;
}
if(AsNative().length() >= 2 && AsNative().substr(0, 1) == L"\\" && AsNative().substr(0, 2) != L"\\\\")
{
// Path is on the same drive as OpenMPT ("\Somepath\" => "C:\Somepath\"), but ignore network paths starting with "\\"
result = mpt::PathString::FromNative(relativeTo.AsNative().substr(0, 2));
result += path;
} else if(AsNative().length() >= 2 && AsNative().substr(0, 2) == L".\\")
{
// Path is OpenMPT's directory or a sub directory (".\Somepath\" => "C:\OpenMPT\Somepath\")
result = relativeTo; // "C:\OpenMPT\"
result += mpt::PathString::FromNative(AsNative().substr(2));
}
return result;
}
