Merge pull request #4007 from B3n30/romfs_file

RomFS: add RomFSFile and RomFS::GetFile

src/core/hle/romfs.cpp

@@ -53,7 +53,17 @@ static bool MatchName(const u8* buffer, u32 name_length, const std::u16string& n
     return name == std::u16string(name_buffer.begin(), name_buffer.end());
 }
 
-const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& path) {
+RomFSFile::RomFSFile(const u8* data, u64 length) : data(data), length(length) {}
+
+const u8* RomFSFile::Data() const {
+    return data;
+}
+
+u64 RomFSFile::Length() const {
+    return length;
+}
+
+const RomFSFile GetFile(const u8* romfs, const std::vector<std::u16string>& path) {
     constexpr u32 INVALID_FIELD = 0xFFFFFFFF;
 
     // Split path into directory names and file name
@@ -73,7 +83,7 @@ const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& pat
         child_dir_offset = dir.first_child_dir_offset;
         while (true) {
             if (child_dir_offset == INVALID_FIELD) {
-                return nullptr;
+                return RomFSFile();
             }
             const u8* current_child_dir = romfs + header.dir_table_offset + child_dir_offset;
             std::memcpy(&dir, current_child_dir, sizeof(dir));
@@ -92,11 +102,11 @@ const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& pat
         const u8* current_file = romfs + header.file_table_offset + file_offset;
         std::memcpy(&file, current_file, sizeof(file));
         if (MatchName(current_file + sizeof(file), file.name_length, file_name)) {
-            return romfs + header.data_offset + file.data_offset;
+            return RomFSFile(romfs + header.data_offset + file.data_offset, file.data_length);
         }
         file_offset = file.next_file_offset;
     }
-    return nullptr;
+    return RomFSFile();
 }
 
 } // namespace RomFS

src/core/hle/romfs.h

@@ -10,13 +10,25 @@
 
 namespace RomFS {
 
+class RomFSFile {
+public:
+    RomFSFile() = default;
+    RomFSFile(const u8* data, u64 length);
+    const u8* Data() const;
+    u64 Length() const;
+
+private:
+    const u8* data = nullptr;
+    u64 length = 0;
+};
+
 /**
- * Gets the pointer to a file in a RomFS image.
+ * Gets a RomFSFile class to a file in a RomFS image.
  * @param romfs The pointer to the RomFS image
  * @param path A vector containing the directory names and file name of the path to the file
- * @return the pointer to the file
+ * @return the RomFSFile to the file
  * @todo reimplement this with a full RomFS manager
  */
-const u8* GetFilePointer(const u8* romfs, const std::vector<std::u16string>& path);
+const RomFSFile GetFile(const u8* romfs, const std::vector<std::u16string>& path);
 
 } // namespace RomFS

src/core/hle/service/apt/apt.cpp

@@ -143,9 +143,9 @@ bool Module::LoadSharedFont() {
 
     const char16_t* file_name[4] = {u"cbf_std.bcfnt.lz", u"cbf_zh-Hans-CN.bcfnt.lz",
                                     u"cbf_ko-Hang-KR.bcfnt.lz", u"cbf_zh-Hant-TW.bcfnt.lz"};
-    const u8* font_file =
-        RomFS::GetFilePointer(romfs_buffer.data(), {file_name[font_region_code - 1]});
-    if (font_file == nullptr)
+    const RomFS::RomFSFile font_file =
+        RomFS::GetFile(romfs_buffer.data(), {file_name[font_region_code - 1]});
+    if (font_file.Data() == nullptr)
         return false;
 
     struct {
@@ -159,7 +159,7 @@ bool Module::LoadSharedFont() {
     shared_font_header.status = 2; // successfully loaded
     shared_font_header.region = font_region_code;
     shared_font_header.decompressed_size =
-        DecompressLZ11(font_file, shared_font_mem->GetPointer(0x80));
+        DecompressLZ11(font_file.Data(), shared_font_mem->GetPointer(0x80));
     std::memcpy(shared_font_mem->GetPointer(), &shared_font_header, sizeof(shared_font_header));
     *shared_font_mem->GetPointer(0x83) = 'U'; // Change the magic from "CFNT" to "CFNU"