| | 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 __new__(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 ---------------------------------------------------- |
~mdw / mLib-python / blame_incremental