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1 | # -*-pyrex-*- |
2 | # |
3 | # $Id$ |
4 | # |
5 | # Universal hashing interface |
6 | # |
7 | # (c) 2005 Straylight/Edgeware |
8 | # |
9 | |
10 | #----- Licensing notice ----------------------------------------------------- |
11 | # |
12 | # This file is part of the Python interface to mLib. |
13 | # |
14 | # mLib/Python is free software; you can redistribute it and/or modify |
15 | # it under the terms of the GNU General Public License as published by |
16 | # the Free Software Foundation; either version 2 of the License, or |
17 | # (at your option) any later version. |
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18 | # |
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19 | # mLib/Python is distributed in the hope that it will be useful, |
20 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | # GNU General Public License for more details. |
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23 | # |
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24 | # You should have received a copy of the GNU General Public License |
25 | # along with mLib/Python; if not, write to the Free Software Foundation, |
26 | # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | |
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28 | def setglobalkey(uint32 k): |
29 | unihash_setkey(&unihash_global, k) |
30 | |
31 | cdef class Key: |
32 | cdef unihash_info _i |
33 | cdef uint32 _k |
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34 | def __cinit__(me, uint32 k): |
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35 | unihash_setkey(&me._i, k) |
36 | me._k = k |
37 | property k: |
38 | def __get__(me): |
39 | return _u32(me._k) |
40 | |
41 | cdef class Unihash: |
42 | cdef uint32 _a |
43 | cdef readonly Key key |
44 | cdef unihash_info *_i |
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45 | def __cinit__(me, key = None): |
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46 | cdef Key k |
47 | me.key = key |
48 | if key is None: |
49 | me._i = &unihash_global |
50 | else: |
51 | k = key |
52 | me._i = &k._i |
53 | me._a = UNIHASH_INIT(me._i) |
54 | def chunk(me, data): |
55 | cdef void *p |
56 | cdef int n |
57 | PyObject_AsReadBuffer(data, &p, &n) |
58 | me._a = unihash_hash(me._i, me._a, p, n) |
59 | def done(me): |
60 | return _u32(me._a) |
61 | |
62 | #----- That's all, folks ---------------------------------------------------- |