Added ezSAT library

1 files changed, 71 insertions, 0 deletions

diff --git a/libs/ezsat/demo_bit.cc b/libs/ezsat/demo_bit.cc
new file mode 100644
index 000000000..2a5099bf7
--- /dev/null
+++ b/libs/ezsat/demo_bit.cc
@@ -0,0 +1,71 @@
+/*
+ *  ezSAT -- A simple and easy to use CNF generator for SAT solvers
+ *
+ *  Copyright (C) 2013  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "ezminisat.h"
+#include <stdio.h>
+
+void print_results(bool satisfiable, const std::vector<bool> &modelValues)
+{
+	if (!satisfiable) {
+		printf("not satisfiable.\n\n");
+	} else {
+		printf("satisfiable:");
+		for (auto val : modelValues)
+			printf(" %d", val ? 1 : 0);
+		printf("\n\n");
+	}
+}
+
+int main()
+{
+	ezMiniSAT sat;
+
+	// 3 input AOI-Gate
+	// 'pos_active' encodes the condition under which the pullup path of the gate is active
+	// 'neg_active' encodes the condition under which the pulldown path of the gate is active
+	// 'impossible' encodes the condition that both or none of the above paths is active
+	int pos_active = sat.AND(sat.NOT("A"), sat.OR(sat.NOT("B"), sat.NOT("C")));
+	int neg_active = sat.OR("A", sat.AND("B", "C"));
+	int impossible = sat.IFF(pos_active, neg_active);
+
+	std::vector<int> modelVars;
+	std::vector<bool> modelValues;
+	bool satisfiable;
+
+	modelVars.push_back(sat.VAR("A"));
+	modelVars.push_back(sat.VAR("B"));
+	modelVars.push_back(sat.VAR("C"));
+
+	printf("\n");
+
+	printf("pos_active: %s\n", sat.to_string(pos_active).c_str());
+	satisfiable = sat.solve(modelVars, modelValues, pos_active);
+	print_results(satisfiable, modelValues);
+
+	printf("neg_active: %s\n", sat.to_string(neg_active).c_str());
+	satisfiable = sat.solve(modelVars, modelValues, neg_active);
+	print_results(satisfiable, modelValues);
+
+	printf("impossible: %s\n", sat.to_string(impossible).c_str());
+	satisfiable = sat.solve(modelVars, modelValues, impossible);
+	print_results(satisfiable, modelValues);
+
+	return 0;
+}
+