SaveDataCheck: Preliminary work in this archive.

This allows Steel Diver to boot further, some files are needed.

This is still not ready and needs a big cleanup, this will possibly be delayed until the way we handle archives is fixed (with factory classes instead of ahead-of-time creation of archives)

2 files changed, 28 insertions, 4 deletions

diff --git a/src/core/file_sys/archive_romfs.cpp b/src/core/file_sys/archive_romfs.cpp
index 2fc3831b7..df07eb657 100644
--- a/src/core/file_sys/archive_romfs.cpp
+++ b/src/core/file_sys/archive_romfs.cpp
@@ -5,6 +5,7 @@
 #include <memory>
 
 #include "common/common_types.h"
+#include "common/file_util.h"
 #include "common/make_unique.h"
 
 #include "core/file_sys/archive_romfs.h"
@@ -23,6 +24,10 @@ Archive_RomFS::Archive_RomFS(const Loader::AppLoader& app_loader) {
     }
 }
 
+Archive_RomFS::Archive_RomFS(std::string mountp) : mount_point(mountp) {
+    
+}
+
 std::unique_ptr<FileBackend> Archive_RomFS::OpenFile(const Path& path, const Mode mode) const {
     return Common::make_unique<File_RomFS>(this);
 }
@@ -67,4 +72,24 @@ ResultCode Archive_RomFS::Format(const Path& path) const {
     return UnimplementedFunction(ErrorModule::FS);
 }
 
+ResultCode Archive_RomFS::Open(const Path& path) {
+    if (mount_point.empty())
+        return RESULT_SUCCESS;
+    auto vec = path.AsBinary();
+    const u32* data = reinterpret_cast<u32*>(vec.data());
+    std::string file_path = Common::StringFromFormat("%s%08X%08X.bin", mount_point.c_str(), data[1], data[0]);
+    FileUtil::IOFile file(file_path, "rb");
+    
+    std::fill(raw_data.begin(), raw_data.end(), 0);
+
+    if (!file.IsOpen()) {
+        return ResultCode(-1); // TODO(Subv): Find the right error code
+    }
+    auto size = file.GetSize();
+    raw_data.resize(size);
+    file.ReadBytes(raw_data.data(), size);
+    file.Close();
+    return RESULT_SUCCESS;
+}
+
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_romfs.h b/src/core/file_sys/archive_romfs.h
index d4b1eb7f2..b657dd38b 100644
--- a/src/core/file_sys/archive_romfs.h
+++ b/src/core/file_sys/archive_romfs.h
@@ -20,6 +20,7 @@ namespace FileSys {
 class Archive_RomFS final : public ArchiveBackend {
 public:
     Archive_RomFS(const Loader::AppLoader& app_loader);
+    Archive_RomFS(std::string mount_point);
 
     std::string GetName() const override { return "RomFS"; }
 
@@ -83,15 +84,13 @@ public:
      */
     std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
 
-    ResultCode Open(const Path& path) override {
-        return RESULT_SUCCESS;
-    }
+    ResultCode Open(const Path& path) override;
 
     ResultCode Format(const Path& path) const override;
 
 private:
     friend class File_RomFS;
-
+    std::string mount_point;
     std::vector<u8> raw_data;
 };