void split_and_sort(int a[], int low, int high){
if(high > low){
int mid = (high + low)/2;
split_and_sort(a, low, mid);
split_and_sort(a, mid+1, high);
merge(a, low, mid, high);
}
}
int main(int argc, char const *argv[]){
int to_be_sort[] = {2,3,1,6,4,7,9};
split_and_sort(to_be_sort, 0, 6);
int i=0;
for(;i<7;i++){
printf("%d\n", to_be_sort[i]);
}
return 0;
}
int main(int argc, char ** argv)
{
if (argc != 3) {
fprintf(stderr, "usage: %s <input> <output>\n", argv[0]);
return EXIT_FAILURE;
}
try {
size_t size = get_available_mem_size();
void *p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
if (p==MAP_FAILED) {
throw std::runtime_error(
format_message_with_errno(
errno,
"Allocating %zu bytes of memory", size));
}
sort_element::base = p;
mem_chunk available_mem = mem_chunk(p, size).aligned();
file_id_t src_file = file_id::create_with_path(argv[1]);
file_id_t dest_file = file_id::create_with_path(argv[2]);
dest_file->set_auto_unlink(true);
std::deque<file_id_t> transient_files;
split_and_sort(available_mem, src_file, dest_file, transient_files);
merge_sorted(available_mem, src_file, dest_file, transient_files);
dest_file->set_auto_unlink(false);
return EXIT_SUCCESS;
}
catch (const std::logic_error &e) {
fprintf(stderr, "%s: Internal error: %s\n", argv[0], e.what());
return EXIT_FAILURE;
}
catch (const std::exception &e) {
fprintf(stderr, "%s: %s\n", argv[0], e.what());
return EXIT_FAILURE;
}
}
