#include "probing_hash_utils.hh"

//Read table from disk, return memory map location
char * readTable(const char * filename, size_t size) {
    //Initial position of the file is the end of the file, thus we know the size
    int fd;
    char * map;

    fd = open(filename, O_RDONLY);
    if (fd == -1) {
        perror("Error opening file for reading");
        exit(EXIT_FAILURE);
    }

    map = (char *)mmap(0, size, PROT_READ, MAP_SHARED, fd, 0);

    if (map == MAP_FAILED) {
        close(fd);
        perror("Error mmapping the file");
        exit(EXIT_FAILURE);
    }

    return map;
} 


void serialize_table(char *mem, size_t size, const char * filename){
    std::ofstream os (filename, std::ios::binary);  
    os.write((const char*)&mem[0], size);
    os.close();

}