upstream/mercurial-mirror Files · mercurial/node.py

revlog: add a magic null revision to our index...

revlog: add a magic null revision to our index We expand our index by one entry so that index[nullrev] points to a unique entry, the null revision. This naturally eliminates numerous extra tests in the performance-sensitive index access functions, most of which are now trivial again. Adding new entries is now done with insert(-1, e) rather than append(e).

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             node.py
        
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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, incorporated herein by reference.

      """

      import binascii

      nullrev = -1

      nullid = "\0" * 20

      def hex(node):

          return binascii.hexlify(node)

      def bin(node):

          return binascii.unhexlify(node)

      def short(node):

          return hex(node[:6])

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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, incorporated herein by reference.
				"""

				import binascii

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

				def hex(node):
				return binascii.hexlify(node)

				def bin(node):
				return binascii.unhexlify(node)

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