Mercurial > hg-stable
view mercurial/changegroup.py @ 3530:cd2216599c99
minor hg grep simplification
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 26 Oct 2006 23:59:21 -0500 |
parents | fe1689273f84 |
children | 025f68f22ae2 |
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""" changegroup.py - Mercurial changegroup manipulation functions Copyright 2006 Matt Mackall <mpm@selenic.com> This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. """ from i18n import gettext as _ from demandload import * demandload(globals(), "struct util") def getchunk(source): """get a chunk from a changegroup""" d = source.read(4) if not d: return "" l = struct.unpack(">l", d)[0] if l <= 4: return "" d = source.read(l - 4) if len(d) < l - 4: raise util.Abort(_("premature EOF reading chunk" " (got %d bytes, expected %d)") % (len(d), l - 4)) return d def chunkiter(source): """iterate through the chunks in source""" while 1: c = getchunk(source) if not c: break yield c def genchunk(data): """build a changegroup chunk""" header = struct.pack(">l", len(data)+ 4) return "%s%s" % (header, data) def closechunk(): return struct.pack(">l", 0)