text: //
  // Copyright (c) 2017 The Khronos Group Inc.
  // 
  // 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.
  //
  #ifndef TEST_CONFORMANCE_CLCPP_UTILS_TEST_UNARY_HPP
  #define TEST_CONFORMANCE_CLCPP_UTILS_TEST_UNARY_HPP
  
  #include <type_traits>
  #include <algorithm>
  #include <string>
  #include <cmath>
  
  #include "../common.hpp"
  
  #include "detail/base_func_type.hpp"
  #include "generate_inputs.hpp"
  #include "compare.hpp"
  
  template<class IN1, class OUT1>
  struct unary_func : public detail::base_func_type<OUT1>
  {
      typedef IN1 in_type;
      typedef OUT1 out_type;
  
      virtual ~unary_func() {};
      virtual std::string str() = 0;
  
      // Return string with function type, for example: int(float).
      std::string decl_str()
      {
          return type_name<OUT1>() + "(" + type_name<IN1>() + ")";
      }
  
      // Return true if IN1 type in OpenCL kernel should be treated
      // as bool type; false otherwise.
      bool is_in1_bool()
      {
          return false;
      }
  
      // Return min value that can be used as a first argument.
      IN1 min1()
      {
          return detail::get_min<IN1>();
      }
  
      // Return max value that can be used as a first argument.
      IN1 max1()
      {
          return detail::get_max<IN1>();
      }
  
      // This returns a list of special cases input values we want to
      // test.
      std::vector<IN1> in_special_cases()
      {
          return { };
      }
  
      // Max error. Error should be raised if
      // abs(result - expected) > delta(.., expected)
      //
      // Default value: 0.001 * expected
      //
      // (This effects how are_equal() function works,
      // it may not have effect if verify() method in derived
      // class does not use are_equal() function.)
      //
      // Only for FP numbers/vectors
      template<class T>
      typename make_vector_type<cl_double, vector_size<T>::value>::type
      delta(const IN1& in1, const T& expected)
      {
          typedef
              typename make_vector_type<cl_double, vector_size<T>::value>::type
              delta_vector_type;
          // Take care of unused variable warning
          (void) in1;
          auto e = detail::make_value<delta_vector_type>(1e-3);
          return detail::multiply<delta_vector_type>(e, expected);
      }
  };
  
  // -----------------------------------------------------------------------------------
  // ------------- ONLY FOR OPENCL 22 CONFORMANCE TEST 22 DEVELOPMENT ------------------
  // -----------------------------------------------------------------------------------
  #if defined(DEVELOPMENT) && defined(USE_OPENCLC_KERNELS)
  template <class func_type, class in_type, class out_type>
  std::string generate_kernel_unary(func_type func)
  {
      std::string in1_value = "input[gid]";
      // Convert uintN to boolN values
      if(func.is_in1_bool())
      {
          std::string i = vector_size<in_type>::value == 1 ? "" : std::to_string(vector_size<in_type>::value);
          in1_value = "(input[gid] != (int" + i + ")(0))";
      }
      std::string function_call = func.str() + "(" + in1_value + ");";
      // Convert boolN result of funtion func_type to uintN
      if(func.is_out_bool())
      {
          std::string i = vector_size<out_type>::value == 1 ? "" : std::to_string(vector_size<out_type>::value);
          function_call = "convert_int" + i + "(" + func.str() + "(" + in1_value + "))";
      }
      return
          "__kernel void " + func.get_kernel_name() + "(global " + type_name<in_type>() + " *input, global " + type_name<out_type>() + " *output)\n"
          "{\n"
          "    size_t gid = get_global_id(0);\n"
          "    output[gid] = " + function_call + ";\n"
          "}\n";
  }
  #else
  template <class func_type, class in_type, class out_type>
  std::string generate_kernel_unary(func_type func)
  {
      std::string headers = func.headers();
      std::string in1_value = "input[gid]";
      if(func.is_in1_bool())
      {
          std::string i = vector_size<in_type>::value == 1 ? "" : std::to_string(vector_size<in_type>::value);
          in1_value = "(input[gid] != (int" + i + ")(0))";
      }
      std::string function_call = func.str() + "(" + in1_value + ")";
      if(func.is_out_bool())
      {
          std::string i = vector_size<out_type>::value == 1 ? "" : std::to_string(vector_size<out_type>::value);
          function_call = "convert_cast<int" + i + ">(" + func.str() + "(" + in1_value + "))";
      }
      if(func.is_out_bool() || func.is_in1_bool())
      {
          if(headers.find("#include <opencl_convert>") == std::string::npos)
          {
              headers += "#include <opencl_convert>\n";
          }
      }
      return
          "" + func.defs() +
          "" + headers +
          "#include <opencl_memory>\n"
          "#include <opencl_work_item>\n"
          "using namespace cl;\n"
          "__kernel void " + func.get_kernel_name() + "(global_ptr<" + type_name<in_type>() +  "[]> input,"
                                                "global_ptr<" + type_name<out_type>() + "[]> output)\n"
          "{\n"
          "    size_t gid = get_global_id(0);\n"
          "    output[gid] = " + function_call + ";\n"
          "}\n";
  }
  #endif
  
  template<class INPUT, class OUTPUT, class unary_op>
  bool verify_unary(const std::vector<INPUT> &in, const std::vector<OUTPUT> &out, unary_op op)
  {
      for(size_t i = 0; i < in.size(); i++)
      {
          auto expected = op(in[i]);
          if(!are_equal(expected, out[i], op.delta(in[i], expected), op))
          {
              print_error_msg(expected, out[i], i, op);
              return false;
          }
      }
      return true;
  }
  
  template <class unary_op>
  int test_unary_func(cl_device_id device, cl_context context, cl_command_queue queue, size_t count, unary_op op)
  {
      cl_mem buffers[2];
      cl_program program;
      cl_kernel kernel;
      size_t work_size[1];
      int err;
  
      typedef typename unary_op::in_type INPUT;
      typedef typename unary_op::out_type OUTPUT;
  
      // Don't run test for unsupported types
      if(!(type_supported<INPUT>(device) && type_supported<OUTPUT>(device)))
      {
          return CL_SUCCESS;
      }
  
      std::string code_str = generate_kernel_unary<unary_op, INPUT, OUTPUT>(op);
      std::string kernel_name = op.get_kernel_name();
  
  // -----------------------------------------------------------------------------------
  // ------------- ONLY FOR OPENCL 22 CONFORMANCE TEST 22 DEVELOPMENT ------------------
  // -----------------------------------------------------------------------------------
  // Only OpenCL C++ to SPIR-V compilation
  #if defined(DEVELOPMENT) && defined(ONLY_SPIRV_COMPILATION)
      err = create_opencl_kernel(context, &program, &kernel, code_str, kernel_name);
      RETURN_ON_ERROR(err)
      return err;
  // Use OpenCL C kernels instead of OpenCL C++ kernels (test C++ host code)
  #elif defined(DEVELOPMENT) && defined(USE_OPENCLC_KERNELS)
      err = create_opencl_kernel(context, &program, &kernel, code_str, kernel_name, "-cl-std=CL2.0", false);
      RETURN_ON_ERROR(err)
  #else
      err = create_opencl_kernel(context, &program, &kernel, code_str, kernel_name);
      RETURN_ON_ERROR(err)
  #endif
  
      std::vector<INPUT> input = generate_input<INPUT>(count, op.min1(), op.max1(), op.in_special_cases());
      std::vector<OUTPUT> output = generate_output<OUTPUT>(count);
  
      buffers[0] = clCreateBuffer(
          context, (cl_mem_flags)(CL_MEM_READ_WRITE), sizeof(INPUT) * input.size(), NULL,  &err
      );
      RETURN_ON_CL_ERROR(err, "clCreateBuffer")
  
      buffers[1] = clCreateBuffer(
          context, (cl_mem_flags)(CL_MEM_READ_WRITE), sizeof(OUTPUT) * output.size(), NULL,  &err
      );
      RETURN_ON_CL_ERROR(err, "clCreateBuffer")
  
      err = clEnqueueWriteBuffer(
          queue, buffers[0], CL_TRUE, 0, sizeof(INPUT) * input.size(),
          static_cast<void *>(input.data()), 0, NULL, NULL
      );
      RETURN_ON_CL_ERROR(err, "clEnqueueWriteBuffer");
  
      err = clSetKernelArg(kernel, 0, sizeof(buffers[0]), &buffers[0]);
      err |= clSetKernelArg(kernel, 1, sizeof(buffers[1]), &buffers[1]);
      RETURN_ON_CL_ERROR(err, "clSetKernelArg");
  
      work_size[0] = count;
      err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, work_size, NULL, 0, NULL, NULL);
      RETURN_ON_CL_ERROR(err, "clEnqueueNDRangeKernel");
  
      err = clEnqueueReadBuffer(
          queue, buffers[1], CL_TRUE, 0, sizeof(OUTPUT) * output.size(),
          static_cast<void *>(output.data()), 0, NULL, NULL
      );
      RETURN_ON_CL_ERROR(err, "clEnqueueReadBuffer");
  
      if (!verify_unary(input, output, op))
      {
          RETURN_ON_ERROR_MSG(-1, "test_%s %s(%s) failed", op.str().c_str(), type_name<OUTPUT>().c_str(), type_name<INPUT>().c_str());
      }
      log_info("test_%s %s(%s) passed\n", op.str().c_str(), type_name<OUTPUT>().c_str(), type_name<INPUT>().c_str());
  
      clReleaseMemObject(buffers[0]);
      clReleaseMemObject(buffers[1]);
      clReleaseKernel(kernel);
      clReleaseProgram(program);
      return err;
  }
  
  #endif // TEST_CONFORMANCE_CLCPP_UTILS_TEST_UNARY_HPP
  