// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <cstdint>
#include <string>

#include "exprtk.hpp"


template <typename T>
void run(const std::string& expression_string)
{
   typedef exprtk::symbol_table<T> symbol_table_t;
   typedef exprtk::expression<T>     expression_t;
   typedef exprtk::parser<T>             parser_t;

   T x = T(1.2345);
   T y = T(2.2345);
   T z = T(3.2345);
   T w = T(4.2345);

   symbol_table_t symbol_table;
   symbol_table.add_variable("x",x);
   symbol_table.add_variable("y",y);
   symbol_table.add_variable("z",z);
   symbol_table.add_variable("w",w);
   symbol_table.add_constants();

   expression_t expression;
   expression.register_symbol_table(symbol_table);

   parser_t parser;
   if (parser.compile(expression_string, expression))
   {
      expression.value();
   }
}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
   const std::string expression(reinterpret_cast<const char*>(data), size);

   run<double>(expression);
   run<float> (expression);

   return 0;
}