#include<stdio.h>
#include<stdint.h>
#include<stdlib.h>
#include<time.h>

int64_t fsize(FILE *fptr) {
	fseek(fptr, 0, SEEK_END);
	int64_t total = ftell(fptr);
	fseek(fptr, 0, SEEK_SET);
	return total;
}

int64_t seed_random() {
	struct timespec ts;
	timespec_get(&ts, TIME_UTC);
	unsigned int seed = (unsigned int)(ts.tv_sec ^ ts.tv_nsec ^ (uintptr_t)&ts);
	srand(seed);
	return 0;
}

int64_t rand_number(int64_t size) {
	return rand()%size;
}