Mercurial > hg

annotate mercurial/node.py @ 24879:b3142ea2a0d4 stable

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parsers: avoid signed integer overflow in calculation of leaf-node index If v = -INT_MAX - 1, -v would exceed INT_MAX. I don't think this would cause problems such as issue4627, but we can't blame it as a compiler bug because signed integer overflow is undefined in C.
author Yuya Nishihara <yuya@tcha.org>
date Wed, 29 Apr 2015 23:07:34 +0900
parents 25e572394f5c
children 1a5211f2f87f
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Martin Geisler <mg@lazybytes.net>
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1 # node.py - basic nodeid manipulation for mercurial
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Martin Geisler <mg@lazybytes.net>
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2 #
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Martin Geisler <mg@lazybytes.net>
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3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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Martin Geisler <mg@lazybytes.net>
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4 #
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5 # This software may be used and distributed according to the terms of the
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25e572394f5c Update license to GPLv2+
Matt Mackall <mpm@selenic.com>
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6 # GNU General Public License version 2 or any later version.
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8 import binascii
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3b4e00cba57a Define and use nullrev (revision of nullid) instead of -1.
Thomas Arendsen Hein <thomas@intevation.de>
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10 nullrev = -1
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11 nullid = "\0" * 20
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Matt Mackall <mpm@selenic.com>
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13 # This ugly style has a noticeable effect in manifest parsing
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Matt Mackall <mpm@selenic.com>
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14 hex = binascii.hexlify
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15 bin = binascii.unhexlify
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17 def short(node):
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18 return hex(node[:6])