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/* -------------------------------------------
Copyright Zeta Electronics Corporation
------------------------------------------- */
#include <KernelKit/FileManager.hpp>
#include <NewKit/Utils.hpp>
/// BUGS: 0
//! @brief File manager for NewOS.
namespace NewOS
{
static FilesystemManagerInterface* kMounted = nullptr;
/// @brief FilesystemManager getter.
/// @return The mounted filesystem.
FilesystemManagerInterface* FilesystemManagerInterface::GetMounted()
{
return kMounted;
}
/// @brief Unmount filesystem.
/// @return The unmounted filesystem.
FilesystemManagerInterface* FilesystemManagerInterface::Unmount()
{
if (kMounted)
{
auto mount = kMounted;
kMounted = nullptr;
return mount;
}
return nullptr;
}
/// @brief Mount filesystem.
/// @param mountPtr The filesystem to mount.
/// @return if it succeeded true, otherwise false.
bool FilesystemManagerInterface::Mount(FilesystemManagerInterface* mountPtr)
{
if (kMounted == nullptr)
{
kMounted = mountPtr;
return true;
}
return false;
}
#ifdef __FSKIT_NEWFS__
/// @brief Opens a new file.
/// @param path
/// @param r
/// @return
NodePtr NewFilesystemManager::Open(const char* path, const char* r)
{
if (!path || *path == 0)
return nullptr;
if (!r || *r == 0)
return nullptr;
auto catalog = fImpl->GetCatalog(path);
if (catalog->Kind != kNewFSCatalogKindFile)
{
fImpl->CloseCatalog(catalog);
return nullptr;
}
return node_cast(catalog);
}
/// @brief Writes to a catalog's fork.
/// @param node the node ptr.
/// @param data the data.
/// @param flags the size.
/// @return
Void NewFilesystemManager::Write(NodePtr node, VoidPtr data, Int32 flags, SizeT size)
{
if (!size ||
size > kNewFSForkSize)
return;
if (!data)
return;
NEWOS_UNUSED(flags);
auto dataForkName = "FileData";
if ((reinterpret_cast<NewCatalog*>(node))->Kind == kNewFSCatalogKindFile)
fImpl->WriteCatalog(reinterpret_cast<NewCatalog*>(node), data, size,
dataForkName);
}
/// @brief Read from filesystem fork.
/// @param node the catalog node.
/// @param flags the flags with it.
/// @param sz the size to read.
/// @return
VoidPtr NewFilesystemManager::Read(NodePtr node, Int32 flags, SizeT sz)
{
if (sz > kNewFSForkSize)
return nullptr;
if (!sz)
return nullptr;
NEWOS_UNUSED(flags);
auto dataForkName = "FileData";
if ((reinterpret_cast<NewCatalog*>(node))->Kind == kNewFSCatalogKindFile)
return fImpl->ReadCatalog(reinterpret_cast<NewCatalog*>(node), sz,
dataForkName);
return nullptr;
}
/// @brief Seek from Catalog.
/// @param node
/// @param off
/// @retval true always returns false, this is unimplemented.
/// @retval false always returns this, it is unimplemented.
bool NewFilesystemManager::Seek(NodePtr node, SizeT off)
{
if (!node || off == 0)
return false;
return fImpl->Seek(reinterpret_cast<NewCatalog*>(node), off);
}
/// @brief Tell where the catalog is.
/// @param node
/// @retval true always returns false, this is unimplemented.
/// @retval false always returns this, it is unimplemented.
SizeT NewFilesystemManager::Tell(NodePtr node)
{
if (!node)
return kNPos;
return fImpl->Tell(reinterpret_cast<NewCatalog*>(node));
}
/// @brief Rewinds the catalog.
/// @param node
/// @retval true always returns false, this is unimplemented.
/// @retval false always returns this, it is unimplemented.
bool NewFilesystemManager::Rewind(NodePtr node)
{
if (!node)
return false;
return this->Seek(node, 0);
}
/// @brief Returns the filesystem parser.
/// @return the Filesystem parser class.
NewFSParser* NewFilesystemManager::GetParser() noexcept
{
return fImpl;
}
#endif // __FSKIT_NEWFS__
} // namespace NewOS
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