A light bigint C implementation
mkdir build && cd build && clang ../src/test_lightbig.c ../src/lightbig.c -o lightbig
git clone https://github.com/smurfd/lightbig
test_lightbig.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include "lightbig/src/lightbig.h"
int main() {
bigint_t *ac, *ad, *a1;
big_init_m(3, &ac, &ad, &a1);
big_alloc_max_m(3, &ac, &ad, &a1);
// Sanity checks
big_set("12231337221", &ac);
big_set("21173313112", &ad);
big_mul(ac, ad, &a1);
big_assert("258977932758692941752", &a1);
big_end_m(3, &ac, &ad, &a1);
printf("OK\n");
}clang test_lightbig.c lightbig/src/lightbig.c -o test