int main(int argc, const char * argv[])
{
//first, we create the linked list header
node *root = malloc(sizeof(node));
node *end = malloc(sizeof(node));
root->next = end;
end->prev = root;
end->next = NULL;
node *current_node = root;
int index;
int list_size = 100;
//then make linked list of 350
//this will be our usable coefficient buffer
for (index = 0; index<list_size; index++){
int random_number = arc4random() % 150;
random_number = (random_number%2)? random_number*-1: random_number;
node *new_node = malloc(sizeof(node));
new_node->coeff_struct.coefficient = random_number;
add_to_linked_list(new_node, current_node);
current_node = current_node->next;
}
printf("\n");
printf("loop coefficients are: ");
//print_linked_list(root);
printf("\n");
char *message = "Hello";/* that whirl me I know not whither\nYour schemes, politics, fail, lines give way, substances mock and elude me,\nOnly the theme I sing, the great and strong-possess'd soul, eludes not,\nOne's-self must never give way--that is the final substance--that\nout of all is sure,\nOut of politics, triumphs, battles, life, what at last finally remains?\nWhen shows break up what but One's-Self is sure?";*/
embedMessageIntoCoefficients(message, root, list_size);
printf("\n\nour stego coefficients: \n");
print_linked_list(root);
printf("\n");
int message_size = (int)strlen(message)*8; //getting size of message in bits
char *extractedMessage = malloc(sizeof(char) *message_size);
extractMessageFromCoefficients(root, list_size, message_size, extractedMessage);
return 0;
}
static void extract(size_t message_size, node *root, size_t usable_size)
{
{
node *current_node = root;
int j = 0;
while (j < 10) {
printf("%i ", current_node->coeff_struct.coefficient);
current_node = current_node->next;
j++;
}
}
printf("began extracting...\n");
char *extractedMessage = malloc(message_size + 1);
if (!extractedMessage) {
perror("malloc");
exit(1);
}
extractMessageFromCoefficients(root, usable_size, message_size, extractedMessage);
printf("extractedMessage is %s\n", extractedMessage);
free(extractedMessage);
}
