1 files changed, 48 insertions, 0 deletions
diff --git a/src/include/bitmapper.h b/src/include/bitmapper.h
new file mode 100644
index 000000000..5a65cc20f
--- /dev/null
+++ b/src/include/bitmapper.h
@@ -0,0 +1,48 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+#ifndef CEPH_BITMAPPER_H
+#define CEPH_BITMAPPER_H
+
+class bitmapper {
+  char *_data;
+  int _len;
+
+ public:
+  bitmapper() : _data(0), _len(0) { }
+  bitmapper(char *data, int len) : _data(data), _len(len) { }
+
+  void set_data(char *data, int len) { _data = data; _len = len; }
+
+  int bytes() const { return _len; }
+  int bits() const { return _len * 8; }
+
+  bool operator[](int b) const {
+    return get(b);
+  }
+  bool get(int b) const {
+    return _data[b >> 3] & (1 << (b&7));
+  }
+  void set(int b) {
+    _data[b >> 3] |= 1 << (b&7);
+  }
+  void clear(int b) {
+    _data[b >> 3] &= ~(1 << (b&7));
+  }
+  void toggle(int b) {
+    _data[b >> 3] ^= 1 << (b&7);
+  }
+};
+
+#endif