|
|
# parsers.py - Python implementation of parsers.c
|
|
|
#
|
|
|
# Copyright 2009 Matt Mackall <mpm@selenic.com> and others
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2, incorporated herein by reference.
|
|
|
|
|
|
from mercurial.node import bin, nullid, nullrev
|
|
|
from mercurial import util
|
|
|
import struct, zlib
|
|
|
|
|
|
_pack = struct.pack
|
|
|
_unpack = struct.unpack
|
|
|
_compress = zlib.compress
|
|
|
_decompress = zlib.decompress
|
|
|
_sha = util.sha1
|
|
|
|
|
|
def parse_manifest(mfdict, fdict, lines):
|
|
|
for l in lines.splitlines():
|
|
|
f, n = l.split('\0')
|
|
|
if len(n) > 40:
|
|
|
fdict[f] = n[40:]
|
|
|
mfdict[f] = bin(n[:40])
|
|
|
else:
|
|
|
mfdict[f] = bin(n)
|
|
|
|
|
|
def parse_index(data, inline):
|
|
|
def gettype(q):
|
|
|
return int(q & 0xFFFF)
|
|
|
|
|
|
def offset_type(offset, type):
|
|
|
return long(long(offset) << 16 | type)
|
|
|
|
|
|
indexformatng = ">Qiiiiii20s12x"
|
|
|
|
|
|
s = struct.calcsize(indexformatng)
|
|
|
index = []
|
|
|
cache = None
|
|
|
nodemap = {nullid: nullrev}
|
|
|
n = off = 0
|
|
|
# if we're not using lazymap, always read the whole index
|
|
|
l = len(data) - s
|
|
|
append = index.append
|
|
|
if inline:
|
|
|
cache = (0, data)
|
|
|
while off <= l:
|
|
|
e = _unpack(indexformatng, data[off:off + s])
|
|
|
nodemap[e[7]] = n
|
|
|
append(e)
|
|
|
n += 1
|
|
|
if e[1] < 0:
|
|
|
break
|
|
|
off += e[1] + s
|
|
|
else:
|
|
|
while off <= l:
|
|
|
e = _unpack(indexformatng, data[off:off + s])
|
|
|
nodemap[e[7]] = n
|
|
|
append(e)
|
|
|
n += 1
|
|
|
off += s
|
|
|
|
|
|
e = list(index[0])
|
|
|
type = gettype(e[0])
|
|
|
e[0] = offset_type(0, type)
|
|
|
index[0] = tuple(e)
|
|
|
|
|
|
# add the magic null revision at -1
|
|
|
index.append((0, 0, 0, -1, -1, -1, -1, nullid))
|
|
|
|
|
|
return index, nodemap, cache
|
|
|
|
|
|
def parse_dirstate(dmap, copymap, st):
|
|
|
parents = [st[:20], st[20: 40]]
|
|
|
# deref fields so they will be local in loop
|
|
|
format = ">cllll"
|
|
|
e_size = struct.calcsize(format)
|
|
|
pos1 = 40
|
|
|
l = len(st)
|
|
|
|
|
|
# the inner loop
|
|
|
while pos1 < l:
|
|
|
pos2 = pos1 + e_size
|
|
|
e = _unpack(">cllll", st[pos1:pos2]) # a literal here is faster
|
|
|
pos1 = pos2 + e[4]
|
|
|
f = st[pos2:pos1]
|
|
|
if '\0' in f:
|
|
|
f, c = f.split('\0')
|
|
|
copymap[f] = c
|
|
|
dmap[f] = e[:4]
|
|
|
return parents
|
|
|
|
