Read a file by chunks

readbychunks.cpp

#include <iostream>
#include <fstream>
#include <vector>

char* filename = "test.bin";
size_t chunk_sz = (32*1024);

int main(void)
{
     std::ifstream fin(filename, std::ifstream::ate | std::ifstream::binary);

    if(fin.is_open())
    {
		size_t offset = 0;
		size_t chunk_len = 0;
		size_t total_size = fin.tellg();
        std::vector<char> chunk(chunk_sz, 0);
        
        fin.clear();
		fin.seekg(0, std::ios::beg);

        while (!fin.eof())
        {
            fin.read(chunk.data(), chunk.size());
            
            chunk_len = fin.gcount();
            
            std::cout << "input file position: " << offset << "+" << chunk_len <<" of " << total_size << std::endl;
            
            offset += fin.gcount();
        }
    }

    return 0;
}