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Release 1.0.5.
[mLib-python] / crc32.pyx
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1### -*-pyrex-*-
2###
3### Cyclic redundancy checker
4###
5### (c) 2005 Straylight/Edgeware
6###
7
8###----- Licensing notice ---------------------------------------------------
9###
10### This file is part of the Python interface to mLib.
11###
12### mLib/Python is free software; you can redistribute it and/or modify
13### it under the terms of the GNU General Public License as published by
14### the Free Software Foundation; either version 2 of the License, or
15### (at your option) any later version.
16###
17### mLib/Python is distributed in the hope that it will be useful,
18### but WITHOUT ANY WARRANTY; without even the implied warranty of
19### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20### GNU General Public License for more details.
21###
22### You should have received a copy of the GNU General Public License
23### along with mLib/Python; if not, write to the Free Software Foundation,
24### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25
26cdef class CRC32:
27 cdef uint32 _a
28 def __cinit__(me, *hunoz, **hukairz):
29 me._a = 0
30 def __init__(me):
31 pass
32 def chunk(me, data):
33 cdef void *p
34 cdef int n
35 PyObject_AsReadBuffer(data, &p, &n)
36 me._a = c_crc32(me._a, p, n)
37 return me
38 def done(me):
39 return _u32(me._a)
40
41def crc32(data):
42 cdef void *p
43 cdef int n
44 cdef uint32 c
45 PyObject_AsReadBuffer(data, &p, &n)
46 c = c_crc32(0, p, n)
47 return _u32(c)
48
49###----- That's all, folks --------------------------------------------------