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Diffstat (limited to 'Source/Core/DiscIO/FileSystemGCWii.cpp')
-rw-r--r--Source/Core/DiscIO/FileSystemGCWii.cpp146
1 files changed, 59 insertions, 87 deletions
diff --git a/Source/Core/DiscIO/FileSystemGCWii.cpp b/Source/Core/DiscIO/FileSystemGCWii.cpp
index a6e7ee0cd1..813201b7a0 100644
--- a/Source/Core/DiscIO/FileSystemGCWii.cpp
+++ b/Source/Core/DiscIO/FileSystemGCWii.cpp
@@ -60,9 +60,58 @@ std::string FileInfoGCWii::GetName() const
}
FileSystemGCWii::FileSystemGCWii(const Volume* _rVolume, const Partition& partition)
- : FileSystem(_rVolume, partition), m_Initialized(false), m_Valid(false), m_offset_shift(0)
+ : FileSystem(_rVolume, partition), m_Valid(false), m_offset_shift(0)
{
- m_Valid = DetectFileSystem();
+ // Check if this is a GameCube or Wii disc
+ if (m_rVolume->ReadSwapped<u32>(0x18, m_partition) == u32(0x5D1C9EA3))
+ {
+ m_offset_shift = 2; // Wii file system
+ m_Valid = true;
+ }
+ else if (m_rVolume->ReadSwapped<u32>(0x1c, m_partition) == u32(0xC2339F3D))
+ {
+ m_offset_shift = 0; // GameCube file system
+ m_Valid = true;
+ }
+
+ if (!m_Valid)
+ return;
+
+ const std::optional<u32> fst_offset_unshifted = m_rVolume->ReadSwapped<u32>(0x424, m_partition);
+ const std::optional<u32> fst_size_unshifted = m_rVolume->ReadSwapped<u32>(0x428, m_partition);
+ if (!fst_offset_unshifted || !fst_size_unshifted)
+ return;
+ const u64 fst_offset = static_cast<u64>(*fst_offset_unshifted) << m_offset_shift;
+ const u64 fst_size = static_cast<u64>(*fst_size_unshifted) << m_offset_shift;
+ if (fst_size < 0xC)
+ return;
+
+ // 128 MiB is more than the total amount of RAM in a Wii.
+ // No file system should use anywhere near that much.
+ static const u32 ARBITRARY_FILE_SYSTEM_SIZE_LIMIT = 128 * 1024 * 1024;
+ if (fst_size > ARBITRARY_FILE_SYSTEM_SIZE_LIMIT)
+ {
+ // Without this check, Dolphin can crash by trying to allocate too much
+ // memory when loading a disc image with an incorrect FST size.
+
+ ERROR_LOG(DISCIO, "File system is abnormally large! Aborting loading");
+ return;
+ }
+
+ // Read the whole FST
+ m_file_system_table.resize(fst_size);
+ if (!m_rVolume->Read(fst_offset, fst_size, m_file_system_table.data(), m_partition))
+ return;
+
+ // Create all file info objects
+ u32 number_of_file_infos = Common::swap32(*((u32*)m_file_system_table.data() + 2));
+ const u8* fst_start = m_file_system_table.data();
+ const u8* name_table_start = fst_start + (number_of_file_infos * 0xC);
+ const u8* name_table_end = fst_start + fst_size;
+ if (name_table_end < name_table_start)
+ return;
+ for (u32 i = 0; i < number_of_file_infos; i++)
+ m_FileInfoVector.emplace_back(m_offset_shift, fst_start + (i * 0xC), name_table_start);
}
FileSystemGCWii::~FileSystemGCWii()
@@ -70,19 +119,13 @@ FileSystemGCWii::~FileSystemGCWii()
m_FileInfoVector.clear();
}
-const std::vector<FileInfoGCWii>& FileSystemGCWii::GetFileList()
+const std::vector<FileInfoGCWii>& FileSystemGCWii::GetFileList() const
{
- if (!m_Initialized)
- InitFileSystem();
-
return m_FileInfoVector;
}
-const FileInfo* FileSystemGCWii::FindFileInfo(const std::string& path)
+const FileInfo* FileSystemGCWii::FindFileInfo(const std::string& path) const
{
- if (!m_Initialized)
- InitFileSystem();
-
if (m_FileInfoVector.empty())
return nullptr;
@@ -150,11 +193,8 @@ const FileInfo* FileSystemGCWii::FindFileInfo(const std::string& path,
return nullptr;
}
-const FileInfo* FileSystemGCWii::FindFileInfo(u64 disc_offset)
+const FileInfo* FileSystemGCWii::FindFileInfo(u64 disc_offset) const
{
- if (!m_Initialized)
- InitFileSystem();
-
for (auto& file_info : m_FileInfoVector)
{
if ((file_info.GetOffset() <= disc_offset) &&
@@ -167,11 +207,8 @@ const FileInfo* FileSystemGCWii::FindFileInfo(u64 disc_offset)
return nullptr;
}
-std::string FileSystemGCWii::GetPath(u64 _Address)
+std::string FileSystemGCWii::GetPath(u64 _Address) const
{
- if (!m_Initialized)
- InitFileSystem();
-
for (size_t i = 0; i < m_FileInfoVector.size(); ++i)
{
const FileInfoGCWii& file_info = m_FileInfoVector[i];
@@ -185,11 +222,8 @@ std::string FileSystemGCWii::GetPath(u64 _Address)
return "";
}
-std::string FileSystemGCWii::GetPathFromFSTOffset(size_t file_info_offset)
+std::string FileSystemGCWii::GetPathFromFSTOffset(size_t file_info_offset) const
{
- if (!m_Initialized)
- InitFileSystem();
-
// Root entry doesn't have a name
if (file_info_offset == 0)
return "";
@@ -226,11 +260,8 @@ std::string FileSystemGCWii::GetPathFromFSTOffset(size_t file_info_offset)
}
u64 FileSystemGCWii::ReadFile(const FileInfo* file_info, u8* _pBuffer, u64 _MaxBufferSize,
- u64 _OffsetInFile)
+ u64 _OffsetInFile) const
{
- if (!m_Initialized)
- InitFileSystem();
-
if (!file_info || file_info->IsDirectory())
return 0;
@@ -248,11 +279,9 @@ u64 FileSystemGCWii::ReadFile(const FileInfo* file_info, u8* _pBuffer, u64 _MaxB
return read_length;
}
-bool FileSystemGCWii::ExportFile(const FileInfo* file_info, const std::string& _rExportFilename)
+bool FileSystemGCWii::ExportFile(const FileInfo* file_info,
+ const std::string& _rExportFilename) const
{
- if (!m_Initialized)
- InitFileSystem();
-
if (!file_info || file_info->IsDirectory())
return false;
@@ -374,61 +403,4 @@ bool FileSystemGCWii::ExportDOL(const std::string& _rExportFolder) const
return false;
}
-bool FileSystemGCWii::DetectFileSystem()
-{
- if (m_rVolume->ReadSwapped<u32>(0x18, m_partition) == u32(0x5D1C9EA3))
- {
- m_offset_shift = 2; // Wii file system
- return true;
- }
- else if (m_rVolume->ReadSwapped<u32>(0x1c, m_partition) == u32(0xC2339F3D))
- {
- m_offset_shift = 0; // GameCube file system
- return true;
- }
-
- return false;
-}
-
-void FileSystemGCWii::InitFileSystem()
-{
- m_Initialized = true;
-
- const std::optional<u32> fst_offset_unshifted = m_rVolume->ReadSwapped<u32>(0x424, m_partition);
- const std::optional<u32> fst_size_unshifted = m_rVolume->ReadSwapped<u32>(0x428, m_partition);
- if (!fst_offset_unshifted || !fst_size_unshifted)
- return;
- const u64 fst_offset = static_cast<u64>(*fst_offset_unshifted) << m_offset_shift;
- const u64 fst_size = static_cast<u64>(*fst_size_unshifted) << m_offset_shift;
- if (fst_size < 0xC)
- return;
-
- // 128 MiB is more than the total amount of RAM in a Wii.
- // No file system should use anywhere near that much.
- static const u32 ARBITRARY_FILE_SYSTEM_SIZE_LIMIT = 128 * 1024 * 1024;
- if (fst_size > ARBITRARY_FILE_SYSTEM_SIZE_LIMIT)
- {
- // Without this check, Dolphin can crash by trying to allocate too much
- // memory when loading a disc image with an incorrect FST size.
-
- ERROR_LOG(DISCIO, "File system is abnormally large! Aborting loading");
- return;
- }
-
- // Read the whole FST
- m_file_system_table.resize(fst_size);
- if (!m_rVolume->Read(fst_offset, fst_size, m_file_system_table.data(), m_partition))
- return;
-
- // Create all file info objects
- u32 number_of_file_infos = Common::swap32(*((u32*)m_file_system_table.data() + 2));
- const u8* fst_start = m_file_system_table.data();
- const u8* name_table_start = fst_start + (number_of_file_infos * 0xC);
- const u8* name_table_end = fst_start + fst_size;
- if (name_table_end < name_table_start)
- return;
- for (u32 i = 0; i < number_of_file_infos; i++)
- m_FileInfoVector.emplace_back(m_offset_shift, fst_start + (i * 0xC), name_table_start);
-}
-
} // namespace
generated by cgit v1.2.3 (git 2.25.1) at 2026-08-04 18:38:13 +0000