upstream/mercurial-mirror Files · mercurial/revlogutils/constants.py

snapshot: make sure we'll never refine delta base from a reused source...

snapshot: make sure we'll never refine delta base from a reused source The point of reusing delta from the source is to avoid doing computation when applying a bundle. Refining such delta would go against that spirit. We do not have refining logic in place yet. This code needed to be moved out of the way before we could start adding such logic.

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      # revlogdeltas.py - constant used for revlog logic

      #

      # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

      # Copyright 2018 Octobus <contact@octobus.net>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      """Helper class to compute deltas stored inside revlogs"""

      from __future__ import absolute_import

      from .. import (

          util,

      )

      # revlog header flags

      REVLOGV0 = 0

      REVLOGV1 = 1

      # Dummy value until file format is finalized.

      # Reminder: change the bounds check in revlog.__init__ when this is changed.

      REVLOGV2 = 0xDEAD

      FLAG_INLINE_DATA = (1 << 16)

      FLAG_GENERALDELTA = (1 << 17)

      REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA

      REVLOG_DEFAULT_FORMAT = REVLOGV1

      REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS

      REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA

      REVLOGV2_FLAGS = REVLOGV1_FLAGS

      # revlog index flags

      REVIDX_ISCENSORED = (1 << 15) # revision has censor metadata, must be verified

      REVIDX_ELLIPSIS = (1 << 14) # revision hash does not match data (narrowhg)

      REVIDX_EXTSTORED = (1 << 13) # revision data is stored externally

      REVIDX_DEFAULT_FLAGS = 0

      # stable order in which flags need to be processed and their processors applied

      REVIDX_FLAGS_ORDER = [

          REVIDX_ISCENSORED,

          REVIDX_ELLIPSIS,

          REVIDX_EXTSTORED,

      ]

      REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)

      # bitmark for flags that could cause rawdata content change

      REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED | REVIDX_EXTSTORED

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				# revlogdeltas.py - constant used for revlog logic
				#
				# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
				# Copyright 2018 Octobus <contact@octobus.net>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.
				"""Helper class to compute deltas stored inside revlogs"""

				from __future__ import absolute_import

				from .. import (
				util,
				)

				# revlog header flags
				REVLOGV0 = 0
				REVLOGV1 = 1
				# Dummy value until file format is finalized.
				# Reminder: change the bounds check in revlog.__init__ when this is changed.
				REVLOGV2 = 0xDEAD
				FLAG_INLINE_DATA = (1 << 16)
				FLAG_GENERALDELTA = (1 << 17)
				REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
				REVLOG_DEFAULT_FORMAT = REVLOGV1
				REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT \| REVLOG_DEFAULT_FLAGS
				REVLOGV1_FLAGS = FLAG_INLINE_DATA \| FLAG_GENERALDELTA
				REVLOGV2_FLAGS = REVLOGV1_FLAGS

				# revlog index flags
				REVIDX_ISCENSORED = (1 << 15) # revision has censor metadata, must be verified
				REVIDX_ELLIPSIS = (1 << 14) # revision hash does not match data (narrowhg)
				REVIDX_EXTSTORED = (1 << 13) # revision data is stored externally
				REVIDX_DEFAULT_FLAGS = 0
				# stable order in which flags need to be processed and their processors applied
				REVIDX_FLAGS_ORDER = [
				REVIDX_ISCENSORED,
				REVIDX_ELLIPSIS,
				REVIDX_EXTSTORED,
				]
				REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
				# bitmark for flags that could cause rawdata content change
				REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED \| REVIDX_EXTSTORED