This page hosts a formal specification of .dat file format of Faster Than Light (FTL) using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for C++98/STL generated by Kaitai Struct depends on the C++/STL runtime library. You have to install it before you can parse data.
For C++, the easiest way is to clone the runtime library sources and build them along with your project.
Using Kaitai Struct in C++/STL usually consists of 3 steps.
std::istream). One can open local file for that, or use existing std::string or char* buffer.
#include <fstream>
std::ifstream is("path/to/local/file.dat", std::ifstream::binary);
#include <sstream>
std::istringstream is(str);
#include <sstream>
const char buf[] = { ... };
std::string str(buf, sizeof buf);
std::istringstream is(str);
#include "kaitai/kaitaistream.h"
kaitai::kstream ks(&is);
ftl_dat_t data(&ks);
After that, one can get various attributes from the structure by invoking getter methods like:
data.num_files() // => Number of files in the archive
#ifndef FTL_DAT_H_
#define FTL_DAT_H_
// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
#include "kaitai/kaitaistruct.h"
#include <stdint.h>
#include <vector>
#if KAITAI_STRUCT_VERSION < 9000L
#error "Incompatible Kaitai Struct C++/STL API: version 0.9 or later is required"
#endif
class ftl_dat_t : public kaitai::kstruct {
public:
class file_t;
class meta_t;
ftl_dat_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent = 0, ftl_dat_t* p__root = 0);
private:
void _read();
void _clean_up();
public:
~ftl_dat_t();
class file_t : public kaitai::kstruct {
public:
file_t(kaitai::kstream* p__io, ftl_dat_t* p__parent = 0, ftl_dat_t* p__root = 0);
private:
void _read();
void _clean_up();
public:
~file_t();
private:
bool f_meta;
meta_t* m_meta;
bool n_meta;
public:
bool _is_null_meta() { meta(); return n_meta; };
private:
public:
meta_t* meta();
private:
uint32_t m_ofs_meta;
ftl_dat_t* m__root;
ftl_dat_t* m__parent;
public:
uint32_t ofs_meta() const { return m_ofs_meta; }
ftl_dat_t* _root() const { return m__root; }
ftl_dat_t* _parent() const { return m__parent; }
};
class meta_t : public kaitai::kstruct {
public:
meta_t(kaitai::kstream* p__io, ftl_dat_t::file_t* p__parent = 0, ftl_dat_t* p__root = 0);
private:
void _read();
void _clean_up();
public:
~meta_t();
private:
uint32_t m_len_file;
uint32_t m_len_filename;
std::string m_filename;
std::string m_body;
ftl_dat_t* m__root;
ftl_dat_t::file_t* m__parent;
public:
uint32_t len_file() const { return m_len_file; }
uint32_t len_filename() const { return m_len_filename; }
std::string filename() const { return m_filename; }
std::string body() const { return m_body; }
ftl_dat_t* _root() const { return m__root; }
ftl_dat_t::file_t* _parent() const { return m__parent; }
};
private:
uint32_t m_num_files;
std::vector<file_t*>* m_files;
ftl_dat_t* m__root;
kaitai::kstruct* m__parent;
public:
/**
* Number of files in the archive
*/
uint32_t num_files() const { return m_num_files; }
std::vector<file_t*>* files() const { return m_files; }
ftl_dat_t* _root() const { return m__root; }
kaitai::kstruct* _parent() const { return m__parent; }
};
#endif // FTL_DAT_H_
// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
#include "ftl_dat.h"
ftl_dat_t::ftl_dat_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent, ftl_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = this;
m_files = 0;
try {
_read();
} catch(...) {
_clean_up();
throw;
}
}
void ftl_dat_t::_read() {
m_num_files = m__io->read_u4le();
m_files = new std::vector<file_t*>();
const int l_files = num_files();
for (int i = 0; i < l_files; i++) {
m_files->push_back(new file_t(m__io, this, m__root));
}
}
ftl_dat_t::~ftl_dat_t() {
_clean_up();
}
void ftl_dat_t::_clean_up() {
if (m_files) {
for (std::vector<file_t*>::iterator it = m_files->begin(); it != m_files->end(); ++it) {
delete *it;
}
delete m_files; m_files = 0;
}
}
ftl_dat_t::file_t::file_t(kaitai::kstream* p__io, ftl_dat_t* p__parent, ftl_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_meta = 0;
f_meta = false;
try {
_read();
} catch(...) {
_clean_up();
throw;
}
}
void ftl_dat_t::file_t::_read() {
m_ofs_meta = m__io->read_u4le();
}
ftl_dat_t::file_t::~file_t() {
_clean_up();
}
void ftl_dat_t::file_t::_clean_up() {
if (f_meta && !n_meta) {
if (m_meta) {
delete m_meta; m_meta = 0;
}
}
}
ftl_dat_t::meta_t* ftl_dat_t::file_t::meta() {
if (f_meta)
return m_meta;
n_meta = true;
if (ofs_meta() != 0) {
n_meta = false;
std::streampos _pos = m__io->pos();
m__io->seek(ofs_meta());
m_meta = new meta_t(m__io, this, m__root);
m__io->seek(_pos);
f_meta = true;
}
return m_meta;
}
ftl_dat_t::meta_t::meta_t(kaitai::kstream* p__io, ftl_dat_t::file_t* p__parent, ftl_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
try {
_read();
} catch(...) {
_clean_up();
throw;
}
}
void ftl_dat_t::meta_t::_read() {
m_len_file = m__io->read_u4le();
m_len_filename = m__io->read_u4le();
m_filename = kaitai::kstream::bytes_to_str(m__io->read_bytes(len_filename()), std::string("UTF-8"));
m_body = m__io->read_bytes(len_file());
}
ftl_dat_t::meta_t::~meta_t() {
_clean_up();
}
void ftl_dat_t::meta_t::_clean_up() {
}