Mercurial > hg-stable
changeset 47265:eac3591abbf4
revlog: add a `_get_decompressor` method
This logic is non-trivial and we will need to reuse it.
Differential Revision: https://phab.mercurial-scm.org/D10651
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Mon, 03 May 2021 21:04:55 +0200 |
| parents | b876f0bf7366 |
| children | ff9fd7107d11 |
| files | mercurial/configitems.py mercurial/revlog.py |
| diffstat | 2 files changed, 17 insertions(+), 12 deletions(-) [+] |
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--- a/mercurial/configitems.py Mon May 03 19:46:25 2021 +0200 +++ b/mercurial/configitems.py Mon May 03 21:04:55 2021 +0200 @@ -1163,7 +1163,8 @@ # * sidedata compression # * introduce a proper solution to reduce the number of filelog related files. # * Improvement to consider -# - track compression mode in the index entris instead of the chunks +# - avoid compression header in chunk using the default compression? +# - forbid "inline" compression mode entirely? # - split the data offset and flag field (the 2 bytes save are mostly trouble) # - keep track of uncompressed -chunk- size (to preallocate memory better) # - keep track of chain base or size (probably not that useful anymore)
--- a/mercurial/revlog.py Mon May 03 19:46:25 2021 +0200 +++ b/mercurial/revlog.py Mon May 03 21:04:55 2021 +0200 @@ -689,6 +689,20 @@ # revlog.target instead of using `self.radix` return self.radix + def _get_decompressor(self, t): + try: + compressor = self._decompressors[t] + except KeyError: + try: + engine = util.compengines.forrevlogheader(t) + compressor = engine.revlogcompressor(self._compengineopts) + self._decompressors[t] = compressor + except KeyError: + raise error.RevlogError( + _(b'unknown compression type %s') % binascii.hexlify(t) + ) + return compressor + @util.propertycache def _compressor(self): engine = util.compengines[self._compengine] @@ -2375,17 +2389,7 @@ elif t == b'u': return util.buffer(data, 1) - try: - compressor = self._decompressors[t] - except KeyError: - try: - engine = util.compengines.forrevlogheader(t) - compressor = engine.revlogcompressor(self._compengineopts) - self._decompressors[t] = compressor - except KeyError: - raise error.RevlogError( - _(b'unknown compression type %s') % binascii.hexlify(t) - ) + compressor = self._get_decompressor(t) return compressor.decompress(data)