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

snapshot: refine candidate snapshot base upward...

snapshot: refine candidate snapshot base upward Once we found a suitable snapshot base it is useful to check if it has a "children" snapshot that would provide a better diff. This is useful when base not directly related to stored revision are picked. In those case, we "jumped" to this new chain at an arbitrary point, checking if a higher point is more appropriate will help to provide better results and increase snapshot reuse.

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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