mercurial/obsolete.py

23802:a3b010f84c57

_fm1parentmask = (_fm1parentnone << _fm1parentshift)
_fm1metapair = 'BB'
_fm1metapairsize = _calcsize('BB')

def _fm1readmarkers(data, off=0):
    # Loop on markers
    stop = len(data) - _fm1fsize
    ufixed = util.unpacker(_fm1fixed)
    while off <= stop:
        # read fixed part
        o1 = off + _fm1fsize
        t, secs, tz, flags, numsuc, numpar, nummeta, prec = ufixed(data[off:o1])

        if flags & usingsha256:
            # read 0 or more successors
            o2 = o1 + _fm1nodesha256size * numsuc
            sucs = _unpack(_fm1nodesha256 * numsuc, data[o1:o2])

            # read parents
            if numpar == _fm1parentnone:
                o3 = o2
                parents = None
            else:
                o3 = o2 + _fm1nodesha256size * numpar
                parents = _unpack(_fm1nodesha256 * numpar, data[o2:o3])
        else:
            # read 0 or more successors
            o2 = o1 + _fm1nodesha1size * numsuc
            sucs = _unpack(_fm1nodesha1 * numsuc, data[o1:o2])

            # read parents
            if numpar == _fm1parentnone:
                o3 = o2
                parents = None
            else:
                o3 = o2 + _fm1nodesha1size * numpar
                parents = _unpack(_fm1nodesha1 * numpar, data[o2:o3])

        # read metadata
        off = o3 + _fm1metapairsize * nummeta
        metapairsize = _unpack('>' + (_fm1metapair * nummeta), data[o3:off])
        metadata = []
        for idx in xrange(0, len(metapairsize), 2):
            o1 = off + metapairsize[idx]
            o2 = o1 + metapairsize[idx + 1]
            metadata.append((data[off:o1], data[o1:o2]))

23803:2763edaba857

_fm1parentmask = (_fm1parentnone << _fm1parentshift)
_fm1metapair = 'BB'
_fm1metapairsize = _calcsize('BB')

def _fm1readmarkers(data, off=0):
    # make some global constants local for performance
    noneflag = _fm1parentnone
    sha2flag = usingsha256
    sha1size = _fm1nodesha1size
    sha2size = _fm1nodesha256size
    sha1fmt = _fm1nodesha1
    sha2fmt = _fm1nodesha256
    metasize = _fm1metapairsize
    metafmt = _fm1metapair
    fsize = _fm1fsize
    unpack = _unpack

    # Loop on markers
    stop = len(data) - _fm1fsize
    ufixed = util.unpacker(_fm1fixed)
    while off <= stop:
        # read fixed part
        o1 = off + fsize
        t, secs, tz, flags, numsuc, numpar, nummeta, prec = ufixed(data[off:o1])

        if flags & sha2flag:
            # read 0 or more successors
            o2 = o1 + sha2size * numsuc
            sucs = unpack(sha2fmt * numsuc, data[o1:o2])

            # read parents
            if numpar == noneflag:
                o3 = o2
                parents = None
            else:
                o3 = o2 + sha2size * numpar
                parents = unpack(sha2fmt * numpar, data[o2:o3])
        else:
            # read 0 or more successors
            o2 = o1 + sha1size * numsuc
            sucs = unpack(sha1fmt * numsuc, data[o1:o2])

            # read parents
            if numpar == noneflag:
                o3 = o2
                parents = None
            else:
                o3 = o2 + sha1size * numpar
                parents = unpack(sha1fmt * numpar, data[o2:o3])

        # read metadata
        off = o3 + metasize * nummeta
        metapairsize = unpack('>' + (metafmt * nummeta), data[o3:off])
        metadata = []
        for idx in xrange(0, len(metapairsize), 2):
            o1 = off + metapairsize[idx]
            o2 = o1 + metapairsize[idx + 1]
            metadata.append((data[off:o1], data[o1:o2]))