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Differential D7844

nodemap: code to parse the persistent binary nodemap data
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Authored by marmoute on Jan 13 2020, 10:07 AM.

Details

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Group Reviewers
hg-reviewers
Commits
rHG78721bbdb2ab: nodemap: code to parse the persistent binary nodemap data
Summary

We now have code to read back what we persisted. This will be put to use in
later changesets.

Diff Detail

Repository
rHG Mercurial
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

marmoute created this revision.Jan 13 2020, 10:07 AM
marmoute updated this revision to Diff 19298.Jan 15 2020, 9:54 AM
marmoute retitled this revision from nodemap: code to parse a serialized nodemap to nodemap: code to parse the persistent binary nodemap data.Jan 31 2020, 10:28 AM
marmoute edited the summary of this revision. (Show Details)
marmoute updated this revision to Diff 19760.
marmoute updated this revision to Diff 19789.Jan 31 2020, 5:59 PM
marmoute updated this revision to Diff 19833.Feb 2 2020, 3:18 AM

small doc update on .#s[1]

marmoute updated this revision to Diff 19892.Feb 4 2020, 7:24 PM

rebase to latest default

marmoute added a commit: rHG78721bbdb2ab: nodemap: code to parse the persistent binary nodemap data.Feb 10 2020, 8:25 PM
This revision was not accepted when it landed; it landed in state Needs Review.
Closed by commit rHG78721bbdb2ab: nodemap: code to parse the persistent binary nodemap data (authored by marmoute). · Explain Why
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathPackages
Mmercurial/revlogutils/nodemap.py (27 lines)

Diff 20112

mercurial/revlogutils/nodemap.py

def _to_value(item, block_map): def _to_value(item, block_map):
"""persist any value as an integer""" """persist any value as an integer"""
if item is None: if item is None:
return NO_ENTRY return NO_ENTRY
elif isinstance(item, dict): elif isinstance(item, dict):
return block_map[id(item)] return block_map[id(item)]
else: else:
return _transform_rev(item) return _transform_rev(item)
def parse_data(data):
"""parse parse nodemap data into a nodemap Trie"""
if (len(data) % S_BLOCK.size) != 0:
msg = "nodemap data size is not a multiple of block size (%d): %d"
raise error.Abort(msg % (S_BLOCK.size, len(data)))
if not data:
return Block()
block_map = {}
new_blocks = []
for i in range(0, len(data), S_BLOCK.size):
block = Block()
ondisk_id = len(block_map)
block_map[ondisk_id] = block
block_data = data[i : i + S_BLOCK.size]
values = S_BLOCK.unpack(block_data)
new_blocks.append((block, values))
for b, values in new_blocks:
for idx, v in enumerate(values):
if v == NO_ENTRY:
continue
elif v >= 0:
b[idx] = block_map[v]
else:
b[idx] = _transform_rev(v)
return block