1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
15 #ifndef CEPH_BITMAPPER_H
16 #define CEPH_BITMAPPER_H
23 bitmapper() : _data(0), _len(0) { }
24 bitmapper(char *data, int len) : _data(data), _len(len) { }
26 void set_data(char *data, int len) { _data = data; _len = len; }
28 int bytes() const { return _len; }
29 int bits() const { return _len * 8; }
31 bool operator[](int b) const {
34 bool get(int b) const {
35 return _data[b >> 3] & (1 << (b&7));
38 _data[b >> 3] |= 1 << (b&7);
41 _data[b >> 3] &= ~(1 << (b&7));
44 _data[b >> 3] ^= 1 << (b&7);