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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
------------------------------------------- */
#ifndef __NE_MINIMAL_OS__
#ifdef __FSKIT_INCLUDES_NEFS__
#include <KernelKit/FileMgr.h>
#include <KernelKit/HeapMgr.h>
/// @brief NeFS File System Manager.
/// BUGS: 0
namespace Kernel {
static inline bool is_valid_nefs_catalog(NodePtr node);
/// @brief C++ constructor
NeFileSystemMgr::NeFileSystemMgr() {
mParser = new NeFileSystemParser();
MUST_PASS(mParser);
kout << "We are done allocating NeFileSystemParser...\n";
}
NeFileSystemMgr::~NeFileSystemMgr() {
if (mParser) {
kout << "Destroying NeFileSystemParser...\n";
delete mParser;
mParser = nullptr;
}
}
/// @brief Removes a node from the filesystem.
/// @param path The filename
/// @return If it was deleted or not.
bool NeFileSystemMgr::Remove(_Input const Char* path) {
if (path == nullptr || *path == 0) {
kout << "NeFS: Remove called with null or empty path\n";
return false;
}
return mParser->RemoveCatalog(path);
}
/// @brief Creates a node with the specified.
/// @param path The filename path.
/// @return The Node pointer.
NodePtr NeFileSystemMgr::Create(_Input const Char* path) {
if (!path || *path == 0) {
kout << "NeFS: Create called with null or empty path\n";
return nullptr;
}
return rtl_node_cast(mParser->CreateCatalog(path));
}
/// @brief Creates a node which is a directory.
/// @param path The filename path.
/// @return The Node pointer.
NodePtr NeFileSystemMgr::CreateDirectory(const Char* path) {
if (!path || *path == 0) {
kout << "NeFS: CreateDirectory called with null or empty path\n";
return nullptr;
}
return rtl_node_cast(mParser->CreateCatalog(path, 0, kNeFSCatalogKindDir));
}
/// @brief Creates a node which is an alias.
/// @param path The filename path.
/// @return The Node pointer.
NodePtr NeFileSystemMgr::CreateAlias(const Char* path) {
if (!path || *path == 0) {
kout << "NeFS: CreateAlias called with null or empty path\n";
return nullptr;
}
return rtl_node_cast(mParser->CreateCatalog(path, 0, kNeFSCatalogKindAlias));
}
NodePtr NeFileSystemMgr::CreateSwapFile(const Char* path) {
if (!path || *path == 0) {
kout << "NeFS: CreateSwapFile called with null or empty path\n";
return nullptr;
}
return rtl_node_cast(mParser->CreateCatalog(path, 0, kNeFSCatalogKindPage));
}
/// @brief Gets the root directory.
/// @return
const Char* NeFileSystemHelper::Root() {
return kNeFSRoot;
}
/// @brief Gets the up-dir directory.
/// @return
const Char* NeFileSystemHelper::UpDir() {
return kNeFSUpDir;
}
/// @brief Gets the separator character.
/// @return
Char NeFileSystemHelper::Separator() {
return kNeFSSeparator;
}
/// @brief Gets the metafile character.
/// @return
Char NeFileSystemHelper::MetaFile() {
return kNeFSMetaFilePrefix;
}
/// @brief Opens a new file.
/// @param path
/// @param r
/// @return
_Output NodePtr NeFileSystemMgr::Open(_Input const Char* path, _Input const Char* r) {
if (!path || *path == 0) {
kout << "NeFS: Open called with null or empty path\n";
return nullptr;
}
if (!r || *r == 0) {
kout << "NeFS: Open called with null or empty mode string\n";
return nullptr;
}
auto catalog = mParser->GetCatalog(path);
if (!catalog) {
kout << "NeFS: Open could not find catalog for path\n";
return nullptr;
}
return rtl_node_cast(catalog);
}
Void NeFileSystemMgr::Write(_Input NodePtr node, _Input VoidPtr data, _Input Int32 flags,
_Input SizeT size) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Write called with invalid node pointer\n";
return;
}
if (!data) {
kout << "NeFS: Write called with null data pointer\n";
return;
}
if (!size || size > kNeFSForkSize) {
(Void)(kout << "NeFS: Write called with invalid size: " << hex_number(size));
kout << "\n";
return;
}
constexpr auto kDataForkName = kNeFSDataFork;
this->Write(kDataForkName, node, data, flags, size);
}
_Output VoidPtr NeFileSystemMgr::Read(_Input NodePtr node, _Input Int32 flags, _Input SizeT size) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Read called with invalid node pointer\n";
return nullptr;
}
if (!size || size > kNeFSForkSize) {
(Void)(kout << "NeFS: Write called with invalid size: " << hex_number(size));
kout << "\n";
return nullptr;
}
constexpr auto kDataForkName = kNeFSDataFork;
return this->Read(kDataForkName, node, flags, size);
}
Void NeFileSystemMgr::Write(_Input const Char* name, _Input NodePtr node, _Input VoidPtr data,
_Input Int32 flags, _Input SizeT size) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Write(fork) called with invalid node pointer\n";
return;
}
if (!name || *name == 0) {
kout << "NeFS: Write(fork) called with null or empty fork name\n";
return;
}
if (!data) {
kout << "NeFS: Write(fork) called with null data pointer\n";
return;
}
if (!size || size > kNeFSForkSize) {
(Void)(kout << "NeFS: Write called with invalid size: " << hex_number(size));
kout << "\n";
return;
}
NE_UNUSED(flags);
auto cat = reinterpret_cast<NEFS_CATALOG_STRUCT*>(node);
if (cat->Kind == kNeFSCatalogKindFile) {
mParser->WriteCatalog(cat->Name, (flags & kFileFlagRsrc ? true : false), data, size, name);
}
}
_Output VoidPtr NeFileSystemMgr::Read(_Input const Char* name, _Input NodePtr node,
_Input Int32 flags, _Input SizeT sz) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Read(fork) called with invalid node pointer\n";
return nullptr;
}
if (!name || *name == 0) {
kout << "NeFS: Read(fork) called with null or empty fork name\n";
return nullptr;
}
if (!sz || sz > kNeFSForkSize) {
(Void)(kout << "NeFS: Write called with invalid size: " << hex_number(sz));
kout << "\n";
return nullptr;
}
NE_UNUSED(flags);
auto cat = reinterpret_cast<NEFS_CATALOG_STRUCT*>(node);
if (cat->Kind == kNeFSCatalogKindFile) {
return mParser->ReadCatalog(cat, (flags & kFileFlagRsrc ? true : false), sz, name);
}
return nullptr;
}
_Output Bool NeFileSystemMgr::Seek(NodePtr node, SizeT off) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Seek called with invalid node pointer\n";
return false;
}
// Allow off == 0
return mParser->Seek(reinterpret_cast<NEFS_CATALOG_STRUCT*>(node), off);
}
/// @brief Tell current offset within catalog.
/// @param node
/// @return kFileMgrNPos if invalid, else current offset.
_Output SizeT NeFileSystemMgr::Tell(NodePtr node) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Tell called with invalid node pointer\n";
return kFileMgrNPos;
}
return mParser->Tell(reinterpret_cast<NEFS_CATALOG_STRUCT*>(node));
}
/// @brief Rewinds the catalog
/// @param node
/// @return False if invalid, nah? calls Seek(node, 0).
_Output Bool NeFileSystemMgr::Rewind(NodePtr node) {
if (!is_valid_nefs_catalog(node)) {
kout << "NeFS: Rewind called with invalid node pointer\n";
return false;
}
return this->Seek(node, 0);
}
/// @brief Returns the parser of NeFS.
_Output NeFileSystemParser* NeFileSystemMgr::GetParser() noexcept {
return mParser;
}
static inline bool is_valid_nefs_catalog(NodePtr node) {
if (!node) return false;
auto cat = reinterpret_cast<NEFS_CATALOG_STRUCT*>(node);
switch (cat->Kind) {
case kNeFSCatalogKindFile:
case kNeFSCatalogKindDir:
case kNeFSCatalogKindAlias:
case kNeFSCatalogKindPage:
break;
default:
return false;
}
bool null_found = false;
for (int i = 0; i < kNeFSCatalogNameLen; ++i) {
if (cat->Name[i] == 0) {
null_found = true;
break;
}
}
if (!null_found) return false;
return true;
}
} // namespace Kernel
#endif // ifdef __FSKIT_INCLUDES_NEFS__
#endif // ifndef __NE_MINIMAL_OS__
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