1 files changed, 60 insertions, 0 deletions
diff --git a/lurker/libesort/Parameters.cpp b/lurker/libesort/Parameters.cpp
new file mode 100644
index 0000000..3a350de
--- /dev/null
+++ b/lurker/libesort/Parameters.cpp
@@ -0,0 +1,60 @@
+/*  $Id: Parameters.cpp 1649 2009-10-19 14:35:01Z terpstra $
+ *  
+ *  Parameters.cpp - Control how the database is stored
+ *  
+ *  Copyright (C) 2002 - Wesley W. Terpstra
+ *  
+ *  License: GPL
+ *  
+ *  Authors: 'Wesley W. Terpstra' <wesley@terpstra.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; version 2.
+ *    
+ *    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
+ */
+
+#define _FILE_OFFSET_BITS 64
+
+#include "esort.h"
+
+#include <cmath>
+#include <cassert>
+
+namespace ESort
+{
+
+Parameters::Parameters(
+	bool          synced,
+	bool          unique,
+	unsigned int  version, 
+	unsigned long blockSize, 
+	unsigned long keySize)
+ : version_(version), blockSize_(blockSize), keySize_(keySize), unique_(unique), synced_(synced)
+{
+	assert (keySize_ > 0);
+	assert (keySize_ * 8 <= blockSize_);
+	
+	keyWidth_ = static_cast<int>(
+		ceil(
+			log(static_cast<double>(keySize_)) /
+			log(256)
+		));
+}
+
+bool Parameters::isWider(const Parameters& p)
+{
+	return version_   > p.version_   ||
+	       blockSize_ > p.blockSize_ ||
+	       keySize_   > p.keySize_;
+}
+
+}