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[Tools] Add DGO packer and unpacker (#219)

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* add dgo tools

* make codacy happy
This commit is contained in:
water111
2021-01-27 20:46:58 -05:00
committed by GitHub
parent 3ea8cbea6f
commit 51f70b6f4b
12 changed files with 261 additions and 75 deletions
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decompiler/ObjectFile/ObjectFileDB.cpp
+7 -61
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@@ -10,6 +10,8 @@
#include <set>
#include <cstring>
#include <map>
#include "common/link_types.h"
#include "common/util/dgo_util.h"
#include "decompiler/data/tpage.h"
#include "decompiler/data/game_text.h"
#include "decompiler/data/StrFileReader.h"
@@ -180,62 +182,6 @@ void ObjectFileDB::load_map_file(const std::string& map_data) {
}
}
// Header for a DGO file
struct DgoHeader {
uint32_t size;
char name[60];
};
namespace {
/*!
* Assert false if the char[] has non-null data after the null terminated string.
* Used to sanity check the sizes of strings in DGO/object file headers.
*/
void assert_string_empty_after(const char* str, int size) {
auto ptr = str;
while (*ptr)
ptr++;
while (ptr - str < size) {
assert(!*ptr);
ptr++;
}
}
} // namespace
namespace {
std::string get_object_file_name(const std::string& original_name, uint8_t* data, int size) {
const char art_group_text[] =
"/src/next/data/art-group6/"; // todo, this may change in other games
const char suffix[] = "-ag.go";
int len = int(strlen(art_group_text));
for (int start = 0; start < size; start++) {
bool failed = false;
for (int i = 0; i < len; i++) {
if (start + i >= size || data[start + i] != art_group_text[i]) {
failed = true;
break;
}
}
if (!failed) {
for (int i = 0; i < int(original_name.length()); i++) {
if (start + len + i >= size || data[start + len + i] != original_name[i]) {
assert(false);
}
}
assert(int(strlen(suffix)) + start + len + int(original_name.length()) < size);
assert(!memcmp(data + start + len + original_name.length(), suffix, strlen(suffix) + 1));
return original_name + "-ag";
}
}
return original_name;
}
} // namespace
constexpr int MAX_CHUNK_SIZE = 0x8000;
/*!
* Load the objects stored in the given DGO into the ObjectFileDB
@@ -303,9 +249,9 @@ void ObjectFileDB::get_objs_from_dgo(const std::string& filename) {
assert_string_empty_after(header.name, 60);
// get all obj files...
for (uint32_t i = 0; i < header.size; i++) {
for (uint32_t i = 0; i < header.object_count; i++) {
auto obj_header = reader.read<DgoHeader>();
assert(reader.bytes_left() >= obj_header.size);
assert(reader.bytes_left() >= obj_header.object_count);
assert_string_empty_after(obj_header.name, 60);
if (std::string(obj_header.name).find("-ag") != std::string::npos) {
@@ -316,10 +262,10 @@ void ObjectFileDB::get_objs_from_dgo(const std::string& filename) {
assert(false);
}
auto name = get_object_file_name(obj_header.name, reader.here(), obj_header.size);
auto name = get_object_file_name(obj_header.name, reader.here(), obj_header.object_count);
add_obj_from_dgo(name, obj_header.name, reader.here(), obj_header.size, dgo_base_name);
reader.ffwd(obj_header.size);
add_obj_from_dgo(name, obj_header.name, reader.here(), obj_header.object_count, dgo_base_name);
reader.ffwd(obj_header.object_count);
}
// check we're at the end