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view mercurial/node.py @ 10325:bc72e21f9dc8

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revlog: add a fast path for checking ancestry
author Dirkjan Ochtman <dirkjan@ochtman.nl>
date Sat, 06 Feb 2010 11:27:22 +0100
parents 25e572394f5c
children 1a5211f2f87f
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# node.py - basic nodeid manipulation for mercurial
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import binascii

nullrev = -1
nullid = "\0" * 20

# This ugly style has a noticeable effect in manifest parsing
hex = binascii.hexlify
bin = binascii.unhexlify

def short(node):
    return hex(node[:6])