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# node.py - basic nodeid manipulation for mercurial
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#
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# Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import binascii
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# This ugly style has a noticeable effect in manifest parsing
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hex = binascii.hexlify
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# Adapt to Python 3 API changes. If this ends up showing up in
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# profiles, we can use this version only on Python 3, and forward
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# binascii.unhexlify like we used to on Python 2.
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def bin(s):
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try:
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return binascii.unhexlify(s)
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except binascii.Error as e:
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raise TypeError(e)
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def short(node):
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return hex(node[:6])
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nullrev = -1
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# pseudo identifier for working directory
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# (experimental, so don't add too many dependencies on it)
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wdirrev = 0x7FFFFFFF
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class sha1nodeconstants(object):
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nodelen = 20
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# In hex, this is '0000000000000000000000000000000000000000'
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nullid = b"\0" * nodelen
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nullhex = hex(nullid)
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# Phony node value to stand-in for new files in some uses of
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# manifests.
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# In hex, this is '2121212121212121212121212121212121212121'
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newnodeid = b'!!!!!!!!!!!!!!!!!!!!'
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# In hex, this is '3030303030303030303030303030306164646564'
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addednodeid = b'000000000000000added'
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# In hex, this is '3030303030303030303030306d6f646966696564'
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modifiednodeid = b'000000000000modified'
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wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid}
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# pseudo identifier for working directory
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# (experimental, so don't add too many dependencies on it)
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# In hex, this is 'ffffffffffffffffffffffffffffffffffffffff'
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wdirid = b"\xff" * nodelen
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wdirhex = hex(wdirid)
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# legacy starting point for porting modules
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nullid = sha1nodeconstants.nullid
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nullhex = sha1nodeconstants.nullhex
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newnodeid = sha1nodeconstants.newnodeid
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addednodeid = sha1nodeconstants.addednodeid
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modifiednodeid = sha1nodeconstants.modifiednodeid
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wdirfilenodeids = sha1nodeconstants.wdirfilenodeids
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wdirid = sha1nodeconstants.wdirid
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wdirhex = sha1nodeconstants.wdirhex
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