contrib/undumprevlog

bdiff: check and cast first parameter value on putbe32() calls

Eliminates

  mercurial/bdiff.c(383) : warning C4244: 'function' : conversion from '__int64'
  to 'uint32_t', possible loss of data
  mercurial/bdiff.c(384) : warning C4244: 'function' : conversion from '__int64'
  to 'uint32_t', possible loss of data
  mercurial/bdiff.c(385) : warning C4244: 'function' : conversion from
  'Py_ssize_t' to 'uint32_t', possible loss of data

when compiling for Windows x64 target using the Microsoft compiler.

#!/usr/bin/env python
# Undump a dump from dumprevlog
# $ hg init
# $ undumprevlog < repo.dump

import sys
from mercurial import revlog, node, scmutil, util, transaction

for fp in (sys.stdin, sys.stdout, sys.stderr):
    util.setbinary(fp)

opener = scmutil.opener('.', False)
tr = transaction.transaction(sys.stderr.write, opener, "undump.journal")
while 1:
    l = sys.stdin.readline()
    if not l:
        break
    if l.startswith("file:"):
        f = l[6:-1]
        r = revlog.revlog(opener, f)
        print f
    elif l.startswith("node:"):
        n = node.bin(l[6:-1])
    elif l.startswith("linkrev:"):
        lr = int(l[9:-1])
    elif l.startswith("parents:"):
        p = l[9:-1].split()
        p1 = node.bin(p[0])
        p2 = node.bin(p[1])
    elif l.startswith("length:"):
        length = int(l[8:-1])
        sys.stdin.readline() # start marker
        d = sys.stdin.read(length)
        sys.stdin.readline() # end marker
        r.addrevision(d, tr, lr, p1, p2)

tr.close()