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comparison mercurial/revlogutils/constants.py @ 46855:aba724bf550e

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revlog: add some comment in the header sections We are about to add more content so let us organise the existing content first. Differential Revision: https://phab.mercurial-scm.org/D10302
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 05 Apr 2021 12:20:40 +0200
parents d4ba4d51f85f
children 34e1fa4b548a
comparison
equal deleted inserted replaced
46854:6afb5ef1e776 46855:aba724bf550e
9 9
10 from __future__ import absolute_import 10 from __future__ import absolute_import
11 11
12 from ..interfaces import repository 12 from ..interfaces import repository
13 13
14 # revlog header flags 14 ### main revlog header
15
16 ## revlog version
15 REVLOGV0 = 0 17 REVLOGV0 = 0
16 REVLOGV1 = 1 18 REVLOGV1 = 1
17 # Dummy value until file format is finalized. 19 # Dummy value until file format is finalized.
18 REVLOGV2 = 0xDEAD 20 REVLOGV2 = 0xDEAD
21
22 ## global revlog header flags
19 # Shared across v1 and v2. 23 # Shared across v1 and v2.
20 FLAG_INLINE_DATA = 1 << 16 24 FLAG_INLINE_DATA = 1 << 16
21 # Only used by v1, implied by v2. 25 # Only used by v1, implied by v2.
22 FLAG_GENERALDELTA = 1 << 17 26 FLAG_GENERALDELTA = 1 << 17
23 REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA 27 REVLOG_DEFAULT_FLAGS = FLAG_INLINE_DATA
24 REVLOG_DEFAULT_FORMAT = REVLOGV1 28 REVLOG_DEFAULT_FORMAT = REVLOGV1
25 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS 29 REVLOG_DEFAULT_VERSION = REVLOG_DEFAULT_FORMAT | REVLOG_DEFAULT_FLAGS
26 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA 30 REVLOGV1_FLAGS = FLAG_INLINE_DATA | FLAG_GENERALDELTA
27 REVLOGV2_FLAGS = FLAG_INLINE_DATA 31 REVLOGV2_FLAGS = FLAG_INLINE_DATA
32
33 ### individual entry
28 34
29 # revlog index flags 35 # revlog index flags
30 36
31 # For historical reasons, revlog's internal flags were exposed via the 37 # For historical reasons, revlog's internal flags were exposed via the
32 # wire protocol and are even exposed in parts of the storage APIs. 38 # wire protocol and are even exposed in parts of the storage APIs.