despace.cu

#include <thrust/host_vector.h>
#include <thrust/device_vector.h>
#include <thrust/generate.h>
#include <thrust/remove.h>
#include <ctime>
#include <fstream>
#include <algorithm>
#include <cstdlib>

struct despace
{
  __host__ __device__
   bool operator()(const char x)
   {
     return (x == ' ' || x == '\n' || x == '\r');
   }
 };
 
 int main(void)
{
	thrust::host_vector<char> h_vec(1000000000);		  // 1GB of data 
	std::cout << "Generating data... " << std::endl;
	std::generate(h_vec.begin(), h_vec.end(), rand);
	std::cout << "Done generating data... " << std::endl;
	
	thrust::device_vector<char> d_vec = h_vec;
   
	std::cout << "despacing" << std::endl;
	std::clock_t start1 = std::clock();
	auto new_end = thrust::remove_if(d_vec.begin(), d_vec.end(), despace());  	
	std::cout<< "remove time " <<  ( ( std::clock() - start1 ) / (double)CLOCKS_PER_SEC ) <<  std::endl;	
	std::cout << "New char count " << new_end - d_vec.begin() << std::endl;
   
	return 0;
};