~mdw / mLib-python / blame
| Commit | Line | Data |
|---|---|---|
| 5b1830f3 MW |
1 | ### -*-pyrex-*- |
| 2 | ### | |
| 3 | ### Cyclic redundancy checker | |
| 4 | ### | |
| 5 | ### (c) 2005 Straylight/Edgeware | |
| 6 | ### | |
| 20bce5e9 | 7 | |
| 5b1830f3 MW |
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. | |
| 20bce5e9 | 25 | |
| 20bce5e9 | 26 | cdef class CRC32: |
| 27 | cdef uint32 _a | |
| 376ad06d | 28 | def __cinit__(me, *hunoz, **hukairz): |
| 20bce5e9 | 29 | me._a = 0 |
| 30 | def __init__(me): | |
| 31 | pass | |
| 32 | def chunk(me, data): | |
| 33 | cdef void *p | |
| 78911cdb | 34 | cdef Py_ssize_t n |
| 704500e1 | 35 | PyObject_AsReadBuffer(data, <cvp *>&p, &n) |
| 20bce5e9 | 36 | me._a = c_crc32(me._a, p, n) |
| 37 | return me | |
| 38 | def done(me): | |
| 39 | return _u32(me._a) | |
| 40 | ||
| 41 | def crc32(data): | |
| 42 | cdef void *p | |
| 78911cdb | 43 | cdef Py_ssize_t n |
| 20bce5e9 | 44 | cdef uint32 c |
| 704500e1 | 45 | PyObject_AsReadBuffer(data, <cvp *>&p, &n) |
| 20bce5e9 | 46 | c = c_crc32(0, p, n) |
| 47 | return _u32(c) | |
| 48 | ||
| 5b1830f3 | 49 | ###----- That's all, folks -------------------------------------------------- |