int TryGeneratedUtf8Encode_F(string input, out string output)
{
try
{
var res = UTF8Encode_F.Apply(input);
output = res;
return 0;
}
catch (Exception e)
{
output = null;
return 1;
}
}
//[TestMethod]
public void TestUTF8Encode()
{
Z3Provider solver = new Z3Provider();
var stb = BekConverter.BekFileToSTb(solver, sampleDir + "bek/UTF8Encode.bek");
var tmp = stb.ToST();
var sft = stb.Explore();
var sft1 = sft.ToST();
//sft.ShowGraph();
//sft1.SaveAsDot("C:/tmp/dot/utf8encode.dot");
#region data for the popl paper
var st = sft.ToST();
int n = st.StateCount;
var moves = new List<Move<Rule<Expr>>>(st.GetMoves());
moves.RemoveAll(x => x.Label.IsFinal);
int m = moves.Count;
int t = System.Environment.TickCount;
var st_o_st = st + st;
int n1 = st_o_st.StateCount;
var moves1 = new List<Move<Rule<Expr>>>(st_o_st.GetMoves());
moves1.RemoveAll(y => y.Label.IsFinal);
int m1 = moves1.Count;
bool diff = st.Eq1(st_o_st);
t = System.Environment.TickCount - t;
#endregion
var restr = sft.ToST().RestrictDomain(".+");
restr.AssertTheory();
Expr inputConst = solver.MkFreshConst("input", restr.InputListSort);
Expr outputConst = solver.MkFreshConst("output", restr.OutputListSort);
solver.MainSolver.Assert(restr.MkAccept(inputConst, outputConst));
//validate correctness for some values against the actual UTF8Encode
//TBD: validate also exceptional behavior, when the generated code throws an exception
//the builtin one must contain the character 0xFFFD
int K = 50;
for (int i = 0; i < K; i++)
{
var model = solver.MainSolver.GetModel(solver.True, inputConst, outputConst);
string input = model[inputConst].StringValue;
string output = model[outputConst].StringValue;
Assert.IsFalse(string.IsNullOrEmpty(input));
Assert.IsFalse(string.IsNullOrEmpty(output));
byte[] encoding = Encoding.UTF8.GetBytes(input);
char[] chars = Array.ConvertAll(encoding, b => (char)b);
string output_expected = new String(chars);
string output_generated = UTF8Encode_F.Apply(input);
string output_generated2 = UTF8Encode.Apply(input);
string output_generated3 = UTF8Encode_B.Apply(input);
Assert.AreEqual<string>(output_expected, output_generated);
Assert.AreEqual<string>(output_expected, output_generated2);
Assert.AreEqual<string>(output_expected, output_generated3);
Assert.AreEqual<string>(output_expected, output);
//exclude this solution, before picking the next one
solver.MainSolver.Assert(solver.MkNeq(inputConst, model[inputConst].Value));
}
}
