### -*-pyrex-*-
###
### Universal hashing interface
###
### (c) 2005 Straylight/Edgeware
###

###----- Licensing notice ---------------------------------------------------
###
### This file is part of the Python interface to mLib.
###
### mLib/Python is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### mLib/Python is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with mLib/Python; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

def setglobalkey(uint32 k):
  unihash_setkey(&unihash_global, k)

cdef class Key:
  cdef unihash_info _i
  cdef uint32 _k
  def __cinit__(me, uint32 k):
    unihash_setkey(&me._i, k)
    me._k = k
  property k:
    def __get__(me):
      return _u32(me._k)

cdef class Unihash:
  cdef uint32 _a
  cdef readonly Key key
  cdef unihash_info *_i
  def __cinit__(me, key = None):
    cdef Key k
    me.key = key
    if key is None:
      me._i = &unihash_global
    else:
      k = key
      me._i = &k._i
    me._a = UNIHASH_INIT(me._i)
  def chunk(me, data):
    cdef void *p
    cdef int n
    PyObject_AsReadBuffer(data, &p, &n)
    me._a = unihash_hash(me._i, me._a, p, n)
  def done(me):
    return _u32(me._a)

###----- That's all, folks --------------------------------------------------