view mercurial/node.py @ 18172:e6c5e0092469

cmdutil: make getgraphlogrevs limit-aware

For a repository with over 400,000 changesets, this speeds up graphlog with a
small limit by around 0.05 seconds (~50%).

# node.py - basic nodeid manipulation for mercurial
#
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
#
# 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])