An experimental implementation of bigIntegers with C
Simply include the header file via #include "int256_t.h" or #include "path/to/int256_t.h"
Additionally, have int256_t.c in the same directory as the header file, or adjust the includes accordingly
To avoid double frees, do not try to free any dynamically allocated int256_ts. free_int256_t() frees up the memory upon exit of the program.
When DIGITS is 78, int256_t supports at least -2^256 to 2^256 - 1
DIGITS can simply be increased to meet your needs