def expand_pci_addr()

in pci_lib/pci_lib.py [0:0]

• 18 lines of code
• 3 McCabe index (conditional complexity)

def expand_pci_addr(pci_addr):
    '''
    Convert a possibly shortened PCI address to its expanded form, including
    normalizing the formatting of long addresses
    '''

    m1 = LONG_PCI_ADDR_REGEX.match(pci_addr)
    m2 = SHORT_PCI_ADDR_REGEX.match(pci_addr)

    if m1:
        domain, bus, device, function = \
            map(lambda n: int(n, 16), m1.groups())
        return '{:04x}:{:02x}:{:02x}.{:x}'.format(
            domain, bus, device, function)
    if m2:
        bus, device, function = \
            map(lambda n: int(n, 16), m2.groups())
        return '{:04x}:{:02x}:{:02x}.{:x}'.format(
            0, bus, device, function)
    return None