bigint.c

/*
 * This file is part of Hoosat Oy's project.
 *
 * Copyright (C) 2024 Toni Lukkaroinen
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * Author: Toni Lukkaroinen
 * Company: Hoosat Oy
 */

#include "bigint.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// Function to initialize a BigInt
void BigInt_init(BigInt *bigint, size_t size) {
    bigint->digits = (unsigned char *)malloc(size);
    if (bigint->digits == NULL) {
        perror("Failed to allocate memory for BigInt");
        exit(EXIT_FAILURE);
    }
    memset(bigint->digits, 0, size);
    bigint->size = size;
}

// Function to free a BigInt
void BigInt_free(BigInt *bigint) {
    free(bigint->digits);
    bigint->digits = NULL;
    bigint->size = 0;
}

// Function to reverse a byte array
static void reverse_bytes(unsigned char *array, size_t length) {
    size_t i;
    for (i = 0; i < length / 2; i++) {
        unsigned char temp = array[i];
        array[i] = array[length - 1 - i];
        array[length - 1 - i] = temp;
    }
}

// Function to print a BigInt
void BigInt_print(const BigInt *bigint) {
    for (size_t i = 0; i < bigint->size; i++) {
        printf("%d", bigint->digits[i]);
    }
    printf("\n");
}