#define CL_HPP_CL_1_2_DEFAULT_BUILD
#define CL_HPP_TARGET_OPENCL_VERSION 120
#define CL_HPP_MINIMUM_OPENCL_VERSION 120
#define CL_HPP_ENABLE_PROGRAM_CONSTRUCTION_FROM_ARRAY_COMPATIBILITY 1
#define CL_USE_DEPRECATED_OPENCL_1_2_APIS

//OCL_CHECK doesn't work if call has templatized function call
#define OCL_CHECK(error,call)                                       \
    call;                                                           \
    if (error != CL_SUCCESS) {                                      \
      printf("%s:%d Error calling " #call ", error code is: %d\n",  \
              __FILE__,__LINE__, error);                            \
      exit(EXIT_FAILURE);                                           \
    }
#define DATA_SIZE 4096

#include <vector>
#include <unistd.h>
#include <iostream>
#include <fstream>
#include <CL/cl2.hpp>

template <typename T>
struct aligned_allocator
{
  using value_type = T;
  T* allocate(std::size_t num)
  {
    void* ptr = nullptr;
    if (posix_memalign(&ptr,4096,num*sizeof(T)))
      throw std::bad_alloc();
    return reinterpret_cast<T*>(ptr);
  }
  void deallocate(T* p, std::size_t num)
  {
    free(p);
  }
};

std::vector<cl::Device> get_devices(const std::string& vendor_name) {

    size_t i;
    cl_int err;
    std::vector<cl::Platform> platforms;
    OCL_CHECK(err, err = cl::Platform::get(&platforms));
    cl::Platform platform;
    for (i  = 0 ; i < platforms.size(); i++){
        platform = platforms[i];
        OCL_CHECK(err, std::string platformName = platform.getInfo<CL_PLATFORM_NAME>(&err));
        if (platformName == vendor_name){
            std::cout << "Found Platform" << std::endl;
            std::cout << "Platform Name: " << platformName.c_str() << std::endl;
            break;
        }
    }
    if (i == platforms.size()) {
        std::cout << "Error: Failed to find Xilinx platform" << std::endl;
        exit(EXIT_FAILURE);
    }
   
    //Getting ACCELERATOR Devices and selecting 1st such device 
    std::vector<cl::Device> devices;
    OCL_CHECK(err, err = platform.getDevices(CL_DEVICE_TYPE_ACCELERATOR, &devices));
    return devices;
}
   
char* read_binary_file(const std::string &xclbin_file_name, unsigned &nb) 
{
    std::cout << "INFO: Reading " << xclbin_file_name << std::endl;

	if(access(xclbin_file_name.c_str(), R_OK) != 0) {
		printf("ERROR: %s xclbin not available please build\n", xclbin_file_name.c_str());
		exit(EXIT_FAILURE);
	}
    //Loading XCL Bin into char buffer 
    std::cout << "Loading: '" << xclbin_file_name.c_str() << "'\n";
    std::ifstream bin_file(xclbin_file_name.c_str(), std::ifstream::binary);
    bin_file.seekg (0, bin_file.end);
    nb = bin_file.tellg();
    bin_file.seekg (0, bin_file.beg);
    char *buf = new char [nb];
    bin_file.read(buf, nb);
    return buf;
}