Allegro library for C (mostly used for game and multimedia apps programming) used its own container file format.
In general, it allows storage of arbitrary binary data blocks bundled together with some simple key-value style metadata ("properties") for every block. Allegro also pre-defines some simple formats for bitmaps, fonts, MIDI music, sound samples and palettes. Allegro library v4.0+ also support LZSS compression.
This spec applies to Allegro data files for library versions 2.2 up to 4.4.
This page hosts a formal specification of Allegro data file 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++11/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);
allegro_dat_t data(&ks);
After that, one can get various attributes from the structure by invoking getter methods like:
data.pack_magic() // => get pack magic
#pragma once
// 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 <memory>
#include <vector>
#if KAITAI_STRUCT_VERSION < 9000L
#error "Incompatible Kaitai Struct C++/STL API: version 0.9 or later is required"
#endif
/**
* Allegro library for C (mostly used for game and multimedia apps
* programming) used its own container file format.
*
* In general, it allows storage of arbitrary binary data blocks
* bundled together with some simple key-value style metadata
* ("properties") for every block. Allegro also pre-defines some simple
* formats for bitmaps, fonts, MIDI music, sound samples and
* palettes. Allegro library v4.0+ also support LZSS compression.
*
* This spec applies to Allegro data files for library versions 2.2 up
* to 4.4.
* \sa https://liballeg.org/stabledocs/en/datafile.html Source
*/
class allegro_dat_t : public kaitai::kstruct {
public:
class dat_font_16_t;
class dat_bitmap_t;
class dat_font_t;
class dat_font_8_t;
class dat_object_t;
class dat_font_3_9_t;
class property_t;
class dat_rle_sprite_t;
enum pack_enum_t {
PACK_ENUM_UNPACKED = 1936484398
};
allegro_dat_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~allegro_dat_t();
/**
* Simple monochrome monospaced font, 95 characters, 8x16 px
* characters.
*/
class dat_font_16_t : public kaitai::kstruct {
public:
dat_font_16_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_font_16_t();
private:
std::unique_ptr<std::vector<std::string>> m_chars;
allegro_dat_t* m__root;
allegro_dat_t::dat_font_t* m__parent;
public:
std::vector<std::string>* chars() const { return m_chars.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_font_t* _parent() const { return m__parent; }
};
class dat_bitmap_t : public kaitai::kstruct {
public:
dat_bitmap_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_bitmap_t();
private:
int16_t m_bits_per_pixel;
uint16_t m_width;
uint16_t m_height;
std::string m_image;
allegro_dat_t* m__root;
allegro_dat_t::dat_object_t* m__parent;
public:
int16_t bits_per_pixel() const { return m_bits_per_pixel; }
uint16_t width() const { return m_width; }
uint16_t height() const { return m_height; }
std::string image() const { return m_image; }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_object_t* _parent() const { return m__parent; }
};
class dat_font_t : public kaitai::kstruct {
public:
dat_font_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_font_t();
private:
int16_t m_font_size;
std::unique_ptr<kaitai::kstruct> m_body;
bool n_body;
public:
bool _is_null_body() { body(); return n_body; };
private:
allegro_dat_t* m__root;
allegro_dat_t::dat_object_t* m__parent;
public:
int16_t font_size() const { return m_font_size; }
kaitai::kstruct* body() const { return m_body.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_object_t* _parent() const { return m__parent; }
};
/**
* Simple monochrome monospaced font, 95 characters, 8x8 px
* characters.
*/
class dat_font_8_t : public kaitai::kstruct {
public:
dat_font_8_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_font_8_t();
private:
std::unique_ptr<std::vector<std::string>> m_chars;
allegro_dat_t* m__root;
allegro_dat_t::dat_font_t* m__parent;
public:
std::vector<std::string>* chars() const { return m_chars.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_font_t* _parent() const { return m__parent; }
};
class dat_object_t : public kaitai::kstruct {
public:
dat_object_t(kaitai::kstream* p__io, allegro_dat_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_object_t();
private:
bool f_type;
std::string m_type;
public:
std::string type();
private:
std::unique_ptr<std::vector<std::unique_ptr<property_t>>> m_properties;
int32_t m_len_compressed;
int32_t m_len_uncompressed;
std::unique_ptr<kaitai::kstruct> m_body;
bool n_body;
public:
bool _is_null_body() { body(); return n_body; };
private:
allegro_dat_t* m__root;
allegro_dat_t* m__parent;
std::string m__raw_body;
std::unique_ptr<kaitai::kstream> m__io__raw_body;
public:
std::vector<std::unique_ptr<property_t>>* properties() const { return m_properties.get(); }
int32_t len_compressed() const { return m_len_compressed; }
int32_t len_uncompressed() const { return m_len_uncompressed; }
kaitai::kstruct* body() const { return m_body.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t* _parent() const { return m__parent; }
std::string _raw_body() const { return m__raw_body; }
kaitai::kstream* _io__raw_body() const { return m__io__raw_body.get(); }
};
/**
* New bitmap font format introduced since Allegro 3.9: allows
* flexible designation of character ranges, 8-bit colored
* characters, etc.
*/
class dat_font_3_9_t : public kaitai::kstruct {
public:
class range_t;
class font_char_t;
dat_font_3_9_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_font_3_9_t();
class range_t : public kaitai::kstruct {
public:
range_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_3_9_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~range_t();
private:
uint8_t m_mono;
uint32_t m_start_char;
uint32_t m_end_char;
std::unique_ptr<std::vector<std::unique_ptr<font_char_t>>> m_chars;
allegro_dat_t* m__root;
allegro_dat_t::dat_font_3_9_t* m__parent;
public:
uint8_t mono() const { return m_mono; }
/**
* First character in range
*/
uint32_t start_char() const { return m_start_char; }
/**
* Last character in range (inclusive)
*/
uint32_t end_char() const { return m_end_char; }
std::vector<std::unique_ptr<font_char_t>>* chars() const { return m_chars.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_font_3_9_t* _parent() const { return m__parent; }
};
class font_char_t : public kaitai::kstruct {
public:
font_char_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_3_9_t::range_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~font_char_t();
private:
uint16_t m_width;
uint16_t m_height;
std::string m_body;
allegro_dat_t* m__root;
allegro_dat_t::dat_font_3_9_t::range_t* m__parent;
public:
uint16_t width() const { return m_width; }
uint16_t height() const { return m_height; }
std::string body() const { return m_body; }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_font_3_9_t::range_t* _parent() const { return m__parent; }
};
private:
int16_t m_num_ranges;
std::unique_ptr<std::vector<std::unique_ptr<range_t>>> m_ranges;
allegro_dat_t* m__root;
allegro_dat_t::dat_font_t* m__parent;
public:
int16_t num_ranges() const { return m_num_ranges; }
std::vector<std::unique_ptr<range_t>>* ranges() const { return m_ranges.get(); }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_font_t* _parent() const { return m__parent; }
};
class property_t : public kaitai::kstruct {
public:
property_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~property_t();
private:
bool f_is_valid;
bool m_is_valid;
public:
bool is_valid();
private:
std::string m_magic;
std::string m_type;
bool n_type;
public:
bool _is_null_type() { type(); return n_type; };
private:
uint32_t m_len_body;
bool n_len_body;
public:
bool _is_null_len_body() { len_body(); return n_len_body; };
private:
std::string m_body;
bool n_body;
public:
bool _is_null_body() { body(); return n_body; };
private:
allegro_dat_t* m__root;
allegro_dat_t::dat_object_t* m__parent;
public:
std::string magic() const { return m_magic; }
std::string type() const { return m_type; }
uint32_t len_body() const { return m_len_body; }
std::string body() const { return m_body; }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_object_t* _parent() const { return m__parent; }
};
class dat_rle_sprite_t : public kaitai::kstruct {
public:
dat_rle_sprite_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent = nullptr, allegro_dat_t* p__root = nullptr);
private:
void _read();
void _clean_up();
public:
~dat_rle_sprite_t();
private:
int16_t m_bits_per_pixel;
uint16_t m_width;
uint16_t m_height;
uint32_t m_len_image;
std::string m_image;
allegro_dat_t* m__root;
allegro_dat_t::dat_object_t* m__parent;
public:
int16_t bits_per_pixel() const { return m_bits_per_pixel; }
uint16_t width() const { return m_width; }
uint16_t height() const { return m_height; }
uint32_t len_image() const { return m_len_image; }
std::string image() const { return m_image; }
allegro_dat_t* _root() const { return m__root; }
allegro_dat_t::dat_object_t* _parent() const { return m__parent; }
};
private:
pack_enum_t m_pack_magic;
std::string m_dat_magic;
uint32_t m_num_objects;
std::unique_ptr<std::vector<std::unique_ptr<dat_object_t>>> m_objects;
allegro_dat_t* m__root;
kaitai::kstruct* m__parent;
public:
pack_enum_t pack_magic() const { return m_pack_magic; }
std::string dat_magic() const { return m_dat_magic; }
uint32_t num_objects() const { return m_num_objects; }
std::vector<std::unique_ptr<dat_object_t>>* objects() const { return m_objects.get(); }
allegro_dat_t* _root() const { return m__root; }
kaitai::kstruct* _parent() const { return m__parent; }
};
// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
#include "allegro_dat.h"
#include "kaitai/exceptions.h"
allegro_dat_t::allegro_dat_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = this;
m_objects = nullptr;
_read();
}
void allegro_dat_t::_read() {
m_pack_magic = static_cast<allegro_dat_t::pack_enum_t>(m__io->read_u4be());
m_dat_magic = m__io->read_bytes(4);
if (!(dat_magic() == std::string("\x41\x4C\x4C\x2E", 4))) {
throw kaitai::validation_not_equal_error<std::string>(std::string("\x41\x4C\x4C\x2E", 4), dat_magic(), _io(), std::string("/seq/1"));
}
m_num_objects = m__io->read_u4be();
m_objects = std::unique_ptr<std::vector<std::unique_ptr<dat_object_t>>>(new std::vector<std::unique_ptr<dat_object_t>>());
const int l_objects = num_objects();
for (int i = 0; i < l_objects; i++) {
m_objects->push_back(std::move(std::unique_ptr<dat_object_t>(new dat_object_t(m__io, this, m__root))));
}
}
allegro_dat_t::~allegro_dat_t() {
_clean_up();
}
void allegro_dat_t::_clean_up() {
}
allegro_dat_t::dat_font_16_t::dat_font_16_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_chars = nullptr;
_read();
}
void allegro_dat_t::dat_font_16_t::_read() {
m_chars = std::unique_ptr<std::vector<std::string>>(new std::vector<std::string>());
const int l_chars = 95;
for (int i = 0; i < l_chars; i++) {
m_chars->push_back(std::move(m__io->read_bytes(16)));
}
}
allegro_dat_t::dat_font_16_t::~dat_font_16_t() {
_clean_up();
}
void allegro_dat_t::dat_font_16_t::_clean_up() {
}
allegro_dat_t::dat_bitmap_t::dat_bitmap_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
_read();
}
void allegro_dat_t::dat_bitmap_t::_read() {
m_bits_per_pixel = m__io->read_s2be();
m_width = m__io->read_u2be();
m_height = m__io->read_u2be();
m_image = m__io->read_bytes_full();
}
allegro_dat_t::dat_bitmap_t::~dat_bitmap_t() {
_clean_up();
}
void allegro_dat_t::dat_bitmap_t::_clean_up() {
}
allegro_dat_t::dat_font_t::dat_font_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
_read();
}
void allegro_dat_t::dat_font_t::_read() {
m_font_size = m__io->read_s2be();
n_body = true;
switch (font_size()) {
case 8: {
n_body = false;
m_body = std::unique_ptr<dat_font_8_t>(new dat_font_8_t(m__io, this, m__root));
break;
}
case 16: {
n_body = false;
m_body = std::unique_ptr<dat_font_16_t>(new dat_font_16_t(m__io, this, m__root));
break;
}
case 0: {
n_body = false;
m_body = std::unique_ptr<dat_font_3_9_t>(new dat_font_3_9_t(m__io, this, m__root));
break;
}
}
}
allegro_dat_t::dat_font_t::~dat_font_t() {
_clean_up();
}
void allegro_dat_t::dat_font_t::_clean_up() {
if (!n_body) {
}
}
allegro_dat_t::dat_font_8_t::dat_font_8_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_chars = nullptr;
_read();
}
void allegro_dat_t::dat_font_8_t::_read() {
m_chars = std::unique_ptr<std::vector<std::string>>(new std::vector<std::string>());
const int l_chars = 95;
for (int i = 0; i < l_chars; i++) {
m_chars->push_back(std::move(m__io->read_bytes(8)));
}
}
allegro_dat_t::dat_font_8_t::~dat_font_8_t() {
_clean_up();
}
void allegro_dat_t::dat_font_8_t::_clean_up() {
}
allegro_dat_t::dat_object_t::dat_object_t(kaitai::kstream* p__io, allegro_dat_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_properties = nullptr;
m__io__raw_body = nullptr;
f_type = false;
_read();
}
void allegro_dat_t::dat_object_t::_read() {
m_properties = std::unique_ptr<std::vector<std::unique_ptr<property_t>>>(new std::vector<std::unique_ptr<property_t>>());
{
int i = 0;
property_t* _;
do {
_ = new property_t(m__io, this, m__root);
m_properties->push_back(std::move(std::unique_ptr<property_t>(_)));
i++;
} while (!(!(_->is_valid())));
}
m_len_compressed = m__io->read_s4be();
m_len_uncompressed = m__io->read_s4be();
n_body = true;
{
std::string on = type();
if (on == std::string("BMP ")) {
n_body = false;
m__raw_body = m__io->read_bytes(len_compressed());
m__io__raw_body = std::unique_ptr<kaitai::kstream>(new kaitai::kstream(m__raw_body));
m_body = std::unique_ptr<dat_bitmap_t>(new dat_bitmap_t(m__io__raw_body.get(), this, m__root));
}
else if (on == std::string("RLE ")) {
n_body = false;
m__raw_body = m__io->read_bytes(len_compressed());
m__io__raw_body = std::unique_ptr<kaitai::kstream>(new kaitai::kstream(m__raw_body));
m_body = std::unique_ptr<dat_rle_sprite_t>(new dat_rle_sprite_t(m__io__raw_body.get(), this, m__root));
}
else if (on == std::string("FONT")) {
n_body = false;
m__raw_body = m__io->read_bytes(len_compressed());
m__io__raw_body = std::unique_ptr<kaitai::kstream>(new kaitai::kstream(m__raw_body));
m_body = std::unique_ptr<dat_font_t>(new dat_font_t(m__io__raw_body.get(), this, m__root));
}
else {
m__raw_body = m__io->read_bytes(len_compressed());
}
}
}
allegro_dat_t::dat_object_t::~dat_object_t() {
_clean_up();
}
void allegro_dat_t::dat_object_t::_clean_up() {
if (!n_body) {
}
}
std::string allegro_dat_t::dat_object_t::type() {
if (f_type)
return m_type;
m_type = properties()->back()->magic();
f_type = true;
return m_type;
}
allegro_dat_t::dat_font_3_9_t::dat_font_3_9_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_ranges = nullptr;
_read();
}
void allegro_dat_t::dat_font_3_9_t::_read() {
m_num_ranges = m__io->read_s2be();
m_ranges = std::unique_ptr<std::vector<std::unique_ptr<range_t>>>(new std::vector<std::unique_ptr<range_t>>());
const int l_ranges = num_ranges();
for (int i = 0; i < l_ranges; i++) {
m_ranges->push_back(std::move(std::unique_ptr<range_t>(new range_t(m__io, this, m__root))));
}
}
allegro_dat_t::dat_font_3_9_t::~dat_font_3_9_t() {
_clean_up();
}
void allegro_dat_t::dat_font_3_9_t::_clean_up() {
}
allegro_dat_t::dat_font_3_9_t::range_t::range_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_3_9_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
m_chars = nullptr;
_read();
}
void allegro_dat_t::dat_font_3_9_t::range_t::_read() {
m_mono = m__io->read_u1();
m_start_char = m__io->read_u4be();
m_end_char = m__io->read_u4be();
m_chars = std::unique_ptr<std::vector<std::unique_ptr<font_char_t>>>(new std::vector<std::unique_ptr<font_char_t>>());
const int l_chars = ((end_char() - start_char()) + 1);
for (int i = 0; i < l_chars; i++) {
m_chars->push_back(std::move(std::unique_ptr<font_char_t>(new font_char_t(m__io, this, m__root))));
}
}
allegro_dat_t::dat_font_3_9_t::range_t::~range_t() {
_clean_up();
}
void allegro_dat_t::dat_font_3_9_t::range_t::_clean_up() {
}
allegro_dat_t::dat_font_3_9_t::font_char_t::font_char_t(kaitai::kstream* p__io, allegro_dat_t::dat_font_3_9_t::range_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
_read();
}
void allegro_dat_t::dat_font_3_9_t::font_char_t::_read() {
m_width = m__io->read_u2be();
m_height = m__io->read_u2be();
m_body = m__io->read_bytes((width() * height()));
}
allegro_dat_t::dat_font_3_9_t::font_char_t::~font_char_t() {
_clean_up();
}
void allegro_dat_t::dat_font_3_9_t::font_char_t::_clean_up() {
}
allegro_dat_t::property_t::property_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
f_is_valid = false;
_read();
}
void allegro_dat_t::property_t::_read() {
m_magic = kaitai::kstream::bytes_to_str(m__io->read_bytes(4), std::string("UTF-8"));
n_type = true;
if (is_valid()) {
n_type = false;
m_type = kaitai::kstream::bytes_to_str(m__io->read_bytes(4), std::string("UTF-8"));
}
n_len_body = true;
if (is_valid()) {
n_len_body = false;
m_len_body = m__io->read_u4be();
}
n_body = true;
if (is_valid()) {
n_body = false;
m_body = kaitai::kstream::bytes_to_str(m__io->read_bytes(len_body()), std::string("UTF-8"));
}
}
allegro_dat_t::property_t::~property_t() {
_clean_up();
}
void allegro_dat_t::property_t::_clean_up() {
if (!n_type) {
}
if (!n_len_body) {
}
if (!n_body) {
}
}
bool allegro_dat_t::property_t::is_valid() {
if (f_is_valid)
return m_is_valid;
m_is_valid = magic() == (std::string("prop"));
f_is_valid = true;
return m_is_valid;
}
allegro_dat_t::dat_rle_sprite_t::dat_rle_sprite_t(kaitai::kstream* p__io, allegro_dat_t::dat_object_t* p__parent, allegro_dat_t* p__root) : kaitai::kstruct(p__io) {
m__parent = p__parent;
m__root = p__root;
_read();
}
void allegro_dat_t::dat_rle_sprite_t::_read() {
m_bits_per_pixel = m__io->read_s2be();
m_width = m__io->read_u2be();
m_height = m__io->read_u2be();
m_len_image = m__io->read_u4be();
m_image = m__io->read_bytes_full();
}
allegro_dat_t::dat_rle_sprite_t::~dat_rle_sprite_t() {
_clean_up();
}
void allegro_dat_t::dat_rle_sprite_t::_clean_up() {
}