67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#include <fstream>
|
|
#include <string>
|
|
#include <iostream>
|
|
|
|
#include "primary_volume_descriptor.hpp"
|
|
#include "directory_record.hpp"
|
|
|
|
void write_field(const uint8_t * s, const int len)
|
|
{
|
|
for (int i = 0; i < len; i++) {
|
|
std::cout << s[i];
|
|
}
|
|
std::cout << '\n';
|
|
}
|
|
|
|
int main()
|
|
{
|
|
std::ifstream ifs("test.iso");
|
|
std::string content( (std::istreambuf_iterator<char>(ifs) ),
|
|
(std::istreambuf_iterator<char>() ) );
|
|
|
|
const char * str = content.c_str();
|
|
auto pvd = reinterpret_cast<const primary_volume_descriptor *>(&str[2048 * 16]);
|
|
|
|
write_field(pvd->standard_identifier, 5);
|
|
|
|
auto root_dr = reinterpret_cast<const directory_record *>(&pvd->directory_record_for_root_directory);
|
|
|
|
std::cout << "root directory record:" << '\n';
|
|
std::cout << root_dr->location_of_extent.get() << '\n';
|
|
std::cout << root_dr->data_length.get() << '\n';
|
|
|
|
uint32_t offset = root_dr->location_of_extent.get() * 2048;
|
|
while (true) {
|
|
std::cout << "\n\n";
|
|
std::cout << "directory entry offset: " << std::hex << offset << '\n';
|
|
auto dr = reinterpret_cast<const directory_record *>(&str[offset]);
|
|
if (dr->length_of_directory_record == 0)
|
|
break;
|
|
|
|
std::cout << "length_of_directory_record: ";
|
|
std::cout << std::dec << (int)dr->length_of_directory_record << '\n';
|
|
std::cout << "length_of_file_identifier: ";
|
|
std::cout << (int)dr->length_of_file_identifier << '\n';
|
|
std::cout << "file_identifier: ";
|
|
write_field(dr->file_identifier, dr->length_of_file_identifier);
|
|
std::cout << std::hex << "file_flags: " << (int)dr->file_flags << '\n';
|
|
|
|
if (dr->file_flags == 0) {
|
|
std::cout << "location_of_extent: " << dr->location_of_extent.get() << '\n';
|
|
std::cout << "data_length: " << std::dec << dr->data_length.get() << '\n';
|
|
|
|
if (dr->file_identifier[0] != '1') {
|
|
const uint32_t extent = dr->location_of_extent.get() * 2048;
|
|
auto file = reinterpret_cast<const uint8_t *>(&str[extent]);
|
|
std::cout << "---begin file content---\n";
|
|
write_field(file, dr->data_length.get());
|
|
std::cout << "---end file content---\n";
|
|
}
|
|
}
|
|
|
|
offset += dr->length_of_directory_record;
|
|
}
|
|
|
|
return 0;
|
|
}
|