1 files changed, 93 insertions, 0 deletions
diff --git a/Hilbert/SetBits.hpp b/Hilbert/SetBits.hpp
new file mode 100644
index 0000000..87f19cb
--- /dev/null
+++ b/Hilbert/SetBits.hpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2006-2007 Chris Hamilton <chamilton@cs.dal.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _SETBITS_HPP_
+#define _SETBITS_HPP_
+
+
+#include <Hilbert/Common.hpp>
+#include <Hilbert/BigBitVec.hpp>
+
+
+namespace Hilbert
+{
+
+	template<class H,class I>
+	H_INLINE
+	void
+	setBits(
+		H &h,				// destination
+		int n,			// number of bits
+		int i,			// bit position
+		const I &w	// bits to place
+		)
+	{
+		// This is terribly inefficient.
+		int j;
+		for ( j = 0; j < n; j++ )
+			h.setBit(i+j,w.getBit(j));
+	}
+
+
+	// <CBigBitVec,CBigBitVec>
+	// #TODO
+
+
+	// <CBigBitVec,CFixBitVec>
+	template<>
+	H_INLINE
+	void
+	setBits(
+		CBigBitVec &h,
+		int n,
+		int i,
+		const CFixBitVec &w
+		)
+	{
+		int ir, ib, t;
+		BBV_MODSPLIT(ir,ib,i);
+		h.racks()[ir] |= w.rack() << ib;
+		t = ib+n;
+		if ( t > FBV_BITS )
+		{
+			t -= FBV_BITS;
+			h.racks()[ir+1] |= w.rack() >> t;
+		}
+		return;
+	}
+	
+	
+	// <CFixBitVec,CFixBitVec>
+	template<>
+	H_INLINE
+	void
+	setBits(
+		CFixBitVec &h,
+		int n,
+		int i,
+		const CFixBitVec &w
+		)
+	{
+		h |= w << i;
+		return;
+	}
+
+};
+
+
+#endif