Mercurial > hg
view mercurial/pure/base85.py @ 43503:313e3a279828
cleanup: remove pointless r-prefixes on double-quoted strings
This is only double-quoted strings. I'll do single-quoted strings as a
second step. These had existed because our source transformer didn't
turn r"" into b"", so we had tagged some strings as r-strings to get
"native" strings on both Pythons. Now that the transformer is gone, we
can dispense with this nonsense.
Methodology:
I ran
hg locate 'set:added() or modified() or clean()' | egrep '.*\.py$' | xargs egrep --color=never -n -- \[\^a-z\]r\"\[\^\"\\\\\]\*\"\[\^\"\]
in an emacs grep-mode buffer, and then used a keyboard macro to
iterate over the results and remove the r prefix as needed.
# skip-blame removing unneeded r prefixes left over from Python 3 migration.
Differential Revision: https://phab.mercurial-scm.org/D7305
author | Augie Fackler <augie@google.com> |
---|---|
date | Thu, 07 Nov 2019 13:18:19 -0500 |
parents | 687b865b95ad |
children | 4394687b298b |
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# base85.py: pure python base85 codec # # Copyright (C) 2009 Brendan Cully <brendan@kublai.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import struct from .. import pycompat _b85chars = pycompat.bytestr( b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef" b"ghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~" ) _b85chars2 = [(a + b) for a in _b85chars for b in _b85chars] _b85dec = {} def _mkb85dec(): for i, c in enumerate(_b85chars): _b85dec[c] = i def b85encode(text, pad=False): """encode text in base85 format""" l = len(text) r = l % 4 if r: text += b'\0' * (4 - r) longs = len(text) >> 2 words = struct.unpack(b'>%dL' % longs, text) out = b''.join( _b85chars[(word // 52200625) % 85] + _b85chars2[(word // 7225) % 7225] + _b85chars2[word % 7225] for word in words ) if pad: return out # Trim padding olen = l % 4 if olen: olen += 1 olen += l // 4 * 5 return out[:olen] def b85decode(text): """decode base85-encoded text""" if not _b85dec: _mkb85dec() l = len(text) out = [] for i in range(0, len(text), 5): chunk = text[i : i + 5] chunk = pycompat.bytestr(chunk) acc = 0 for j, c in enumerate(chunk): try: acc = acc * 85 + _b85dec[c] except KeyError: raise ValueError( b'bad base85 character at position %d' % (i + j) ) if acc > 4294967295: raise ValueError(b'Base85 overflow in hunk starting at byte %d' % i) out.append(acc) # Pad final chunk if necessary cl = l % 5 if cl: acc *= 85 ** (5 - cl) if cl > 1: acc += 0xFFFFFF >> (cl - 2) * 8 out[-1] = acc out = struct.pack(b'>%dL' % (len(out)), *out) if cl: out = out[: -(5 - cl)] return out