func()

in providers/windows/device_windows.go [110:150]

• 36 lines of code
• 13 McCabe index (conditional complexity)

func (mapper *deviceMapper) DevicePathToDrivePath(path string) (string, error) {
	pathLower := strings.ToLower(path)
	isMUP := strings.Index(pathLower, DeviceMup) == 0
	mask, err := mapper.GetLogicalDrives()
	if err != nil {
		return "", fmt.Errorf("GetLogicalDrives: %w", err)
	}

	for bit := uint32(0); mask != 0 && bit < uint32('Z'-'A'+1); bit++ {
		if mask&(1<<bit) == 0 {
			continue
		}
		mask ^= 1 << bit
		driveLetter := byte('A' + bit)
		dev, err := mapper.getDevice(driveLetter)
		if err != nil {
			continue
		}

		dev = fixNetworkDrivePath(strings.ToLower(dev))
		found := strings.Index(pathLower, dev) == 0

		if !found && isMUP && strings.Contains(dev, LANManRedirector) {
			dev = strings.Replace(dev, LANManRedirector, "mup", 1)
			found = strings.Index(pathLower, dev) == 0
		}
		if found {
			off := len(dev)
			if off < len(path) && path[off] == '\\' {
				off++
			}
			return string(driveLetter) + ":\\" + path[off:], nil
		}
	}
	// Handle unmapped shares:
	// \device\mup\server\share\path -> \\server\share\path
	if isMUP {
		return "\\" + path[len(DeviceMup):], nil
	}
	return "", ErrDeviceNotFound
}