1 # node.py - basic nodeid manipulation for mercurial

     2 #

     3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>

     4 #

     5 # This software may be used and distributed according to the terms of the

     6 # GNU General Public License version 2 or any later version.

     7 

     8 import binascii

     9 

    10 nullrev = -1

    11 nullid = "\0" * 20

    12 

    13 # This ugly style has a noticeable effect in manifest parsing

    14 hex = binascii.hexlify

    15 bin = binascii.unhexlify

    16 

    17 def short(node):

    18     return hex(node[:6])