[Sumover-dev] [svn commit] r4333 - vic/branches/cc/cc

[sumover-dev at cs.ucl.ac.uk]

Author: soohyunc
Date: Sat Nov 22 19:35:46 2008
New Revision: 4333

Added:
   vic/branches/cc/cc/bitmap.h   (contents, props changed)

Log:
o  new bitmap.h file that has necessary bitmap operations
   (to build up or trim Ack vector)


Added: vic/branches/cc/cc/bitmap.h
==============================================================================
--- (empty file)
+++ vic/branches/cc/cc/bitmap.h	Sat Nov 22 19:35:46 2008
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2008 University College London
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *  This product includes software developed by the MASH Research
+ *  Group at the University of California Berkeley.
+ * 4. Neither the name of the University nor of the Research Group may be
+ *    used to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+#ifndef vic_cc_bitmap_h
+#define vic_cc_bitmap_h
+
+#define CHB 0x80000000  // check head bit (head search)
+#define CTB 0x01        // check tail bit (tail search)
+
+// set bitmap from LSB
+#define SET_BIT_VEC(bitmap, bit) ( bitmap = ((bitmap << 1) | bit) )
+
+// get bitmap at i-th location
+#define GET_BIT_VEC(bitmap, i, seqno) ( (1 << (seqno - i)) & bitmap )
+
+// bitmap head search
+#define GET_HEAD_VEC(bitmap, i) ( bitmap & (CHB >> i) )
+
+// bitmap tail search
+#define GET_TAIL_VEC(bitmap, i) ( bitmap & (CTB << i) )
+
+// check bit at i-th location
+#define CHECK_BIT_AT(bitmap, i) ( bitmap & (1 << (i-1)) )
+
+#endif /* vic_cc_bitmap_h */