Support "game count" and v4 objects (#140)

* generate object, but not supported in linker yet

* add link and tests

* update types

decompiler/ObjectFile/LinkedObjectFileCreation.cpp

@@ -27,14 +27,6 @@ struct LinkHeaderCommon {
   uint16_t version;   // what version (2, 3, 4)
 };
 
-// Header for link data used for V4
-struct LinkHeaderV4 {
-  uint32_t type_tag;   // always -1
-  uint32_t length;     // length of V2 link data found after object.
-  uint32_t version;    // always 4
-  uint32_t code_size;  // length of object data before link data starts
-};
-
 // Per-segment info for V3 and V5 link data
 struct SegmentInfo {
   uint32_t relocs;  // offset of relocation table

decompiler/ObjectFile/ObjectFileDB.cpp

@@ -13,6 +13,7 @@
 #include "decompiler/data/tpage.h"
 #include "decompiler/data/game_text.h"
 #include "decompiler/data/StrFileReader.h"
+#include "decompiler/data/game_count.h"
 #include "LinkedObjectFileCreation.h"
 #include "decompiler/config.h"
 #include "third-party/minilzo/minilzo.h"
@@ -715,6 +716,26 @@ std::string ObjectFileDB::process_game_text() {
   return write_game_text(text_by_language_by_id);
 }
 
+std::string ObjectFileDB::process_game_count() {
+  spdlog::info("- Finding game count file...");
+  bool found = false;
+  std::string result;
+
+  for_each_obj([&](ObjectFileData& data) {
+    if (data.name_in_dgo == "game-cnt") {
+      assert(!found);
+      found = true;
+      result = write_game_count(::process_game_count(data));
+    }
+  });
+
+  if (!found) {
+    spdlog::warn("did not find game-cnt file");
+  }
+
+  return result;
+}
+
 void ObjectFileDB::analyze_functions() {
   spdlog::info("- Analyzing Functions...");
   Timer timer;
@@ -916,3 +937,10 @@ void ObjectFileDB::analyze_functions() {
   //      }
   //    }
 }
+
+void ObjectFileDB::dump_raw_objects(const std::string& output_dir) {
+  for_each_obj([&](ObjectFileData& data) {
+    auto dest = output_dir + "/" + data.to_unique_name();
+    file_util::write_binary_file(dest, data.data.data(), data.data.size());
+  });
+}

decompiler/ObjectFile/ObjectFileDB.h

@@ -55,11 +55,13 @@ class ObjectFileDB {
   void process_labels();
   void find_code();
   void find_and_write_scripts(const std::string& output_dir);
+  void dump_raw_objects(const std::string& output_dir);
 
   void write_object_file_words(const std::string& output_dir, bool dump_v3_only);
   void write_disassembly(const std::string& output_dir, bool disassemble_objects_without_functions);
   void analyze_functions();
   void process_tpages();
+  std::string process_game_count();
   std::string process_game_text();
 
   ObjectFileData& lookup_record(const ObjectFileRecord& rec);