int write_file(union directory_entry *file, unsigned int position, unsigned int size, char *str) {
unsigned int offset, bytes_left, cur_clus, bytes_per_clus, byte_position, nmemb, start;
bytes_per_clus = img_info.bytes_per_sec*img_info.sec_per_clus;
offset = position;
bytes_left = size;
start = 0;
cur_clus = get_file_cluster(file);
while (offset > bytes_per_clus) {
cur_clus = get_next_cluster_in_fat(cur_clus);
if (end_of_chain(cur_clus)) {
expand_cluster(cur_clus);
}
offset -= bytes_per_clus;
}
byte_position = img_info.bytes_per_sec*get_first_sector_of_cluster(cur_clus) + offset;
if (bytes_left > bytes_per_clus - offset) {
nmemb = bytes_per_clus - offset;
} else {
nmemb = bytes_left;
}
write_chars(&str[start], byte_position, nmemb);
bytes_left -= nmemb;
start += nmemb;
while (bytes_left > 0) {
cur_clus = get_next_cluster_in_fat(cur_clus);
if (end_of_chain(cur_clus)) {
expand_cluster(cur_clus);
}
byte_position = img_info.bytes_per_sec*get_first_sector_of_cluster(cur_clus);
if (bytes_left < bytes_per_clus) {
nmemb = bytes_left;
} else {
nmemb = bytes_per_clus;
}
write_chars(&str[start], byte_position, nmemb);
bytes_left -= nmemb;
start += nmemb;
}
if (position + size > file->sf.file_size) {
file->sf.file_size = position + size;
}
return 1;
}
void clique::process(const dataset & p_data, cluster_data & p_result) {
m_data_ptr = &p_data;
m_result_ptr = dynamic_cast<clique_data *>(&p_result);
create_grid();
for (auto & block : m_result_ptr->blocks()) {
if (!block.is_visited()) {
expand_cluster(block);
}
}
m_cells_map.clear();
}
