| 1 | # -*-pyrex-*- |
| 2 | # |
| 3 | # $Id$ |
| 4 | # |
| 5 | # Cyclic redundancy checker |
| 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. |
| 18 | # |
| 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. |
| 23 | # |
| 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 | |
| 28 | cdef class CRC32: |
| 29 | cdef uint32 _a |
| 30 | def __cinit__(me, *hunoz, **hukairz): |
| 31 | me._a = 0 |
| 32 | def __init__(me): |
| 33 | pass |
| 34 | def chunk(me, data): |
| 35 | cdef void *p |
| 36 | cdef int n |
| 37 | PyObject_AsReadBuffer(data, &p, &n) |
| 38 | me._a = c_crc32(me._a, p, n) |
| 39 | return me |
| 40 | def done(me): |
| 41 | return _u32(me._a) |
| 42 | |
| 43 | def crc32(data): |
| 44 | cdef void *p |
| 45 | cdef int n |
| 46 | cdef uint32 c |
| 47 | PyObject_AsReadBuffer(data, &p, &n) |
| 48 | c = c_crc32(0, p, n) |
| 49 | return _u32(c) |
| 50 | |
| 51 | #----- That's all, folks ---------------------------------------------------- |