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/*
* ========================================================
*
* hCore
* Copyright 2024 Mahrouss Logic, all rights reserved.
*
* ========================================================
*/
#pragma once
#include <NewKit/Stream.hpp>
#include <NewKit/Ref.hpp>
#include <FSKit/NewFS.hxx>
#include <NewKit/ErrorID.hpp>
#include <NewKit/Ref.hpp>
/// Main filesystem abstraction manager.
#define kBootFolder "/boot"
#define kBinFolder "/bin"
#define kShLibsFolder "/lib"
#define kSectorSz 512
/// refer to first enum.
#define kFileOpsCount 4
namespace hCore
{
enum
{
kFileWriteAll = 100,
kFileReadAll = 101,
kFileReadChunk = 102,
kFileWriteChunk = 103,
};
typedef VoidPtr NodePtr;
class IFilesystemManager
{
public:
IFilesystemManager() = default;
virtual ~IFilesystemManager() = default;
public:
HCORE_COPY_DEFAULT(IFilesystemManager);
public:
static bool Mount(IFilesystemManager* pMount);
static IFilesystemManager* Unmount();
static IFilesystemManager* GetMounted();
public:
virtual NodePtr Create(const char* path) = 0;
virtual NodePtr CreateAlias(const char* path) = 0;
virtual NodePtr CreateDirectory(const char* path) = 0;
public:
virtual bool Remove(const char* path) = 0;
public:
virtual NodePtr Open(const char* path, const char* r) = 0;
public:
virtual void Write(NodePtr node, VoidPtr data, Int32 flags) = 0;
virtual VoidPtr Read(NodePtr node, Int32 flags, SizeT sz) = 0;
public:
virtual bool Seek(NodePtr node, SizeT off) = 0;
public:
virtual SizeT Tell(NodePtr node) = 0;
virtual bool Rewind(NodePtr node) = 0;
};
/**
* @brief Child of IFilesystemManager, takes care of managing NewFS disks.
*/
class NewFilesystemManager final : public IFilesystemManager
{
public:
explicit NewFilesystemManager();
~NewFilesystemManager() override;
public:
HCORE_COPY_DEFAULT(NewFilesystemManager);
public:
NodePtr Create(const char* path) override;
NodePtr CreateAlias(const char* path) override;
NodePtr CreateDirectory(const char* path) override;
public:
bool Remove(const char* node) override;
public:
NodePtr Open(const char* path, const char* r) override { return nullptr; }
public:
void Write(NodePtr node, VoidPtr data, Int32 flags) override { }
VoidPtr Read(NodePtr node, Int32 flags, SizeT sz) override { return nullptr; }
public:
bool Seek(NodePtr node, SizeT off) override { return true; }
public:
SizeT Tell(NodePtr node) override { return 0; }
bool Rewind(NodePtr node) override { this->Seek(node, 0); return true; }
public:
NewFSImpl* fIO{ nullptr };
};
/**
* Usable FileStream
* @tparam Encoding file encoding (char, wchar_t...)
* @tparam FSClass Filesystem contract who takes care of it.
*/
template <typename Encoding = char, typename FSClass = NewFilesystemManager>
class FileStream final
{
public:
explicit FileStream(const Encoding* path);
~FileStream();
public:
FileStream &operator=(const FileStream &); \
FileStream(const FileStream &);
public:
ErrorOr<Int64> WriteAll(const VoidPtr data) noexcept
{
if (data == nullptr)
return ErrorOr<Int64>(ME_INVALID_DATA);
auto man = FSClass::GetMounted();
if (man)
{
man->Write(fFile, data, kFileWriteAll);
return ErrorOr<Int64>(0);
}
return ErrorOr<Int64>(ME_INVALID_DATA);
}
VoidPtr ReadAll() noexcept
{
auto man = FSClass::GetMounted();
if (man)
{
VoidPtr ret = man->Read(fFile, kFileReadAll, 0);
return ret;
}
return nullptr;
}
voidPtr Read(SizeT offset, SizeT sz)
{
auto man = FSClass::GetMounted();
if (man)
{
man->Seek(fFile, offset);
auto ret = man->Read(fFile, kFileReadChunk, sz);
return ret;
}
return nullptr;
}
void Write(SizeT offset, voidPtr data, SizeT sz)
{
auto man = FSClass::GetMounted();
if (man)
{
man->Seek(fFile, offset);
man->Write(fFile, data, sz, kFileReadChunk);
}
}
public:
const char* MIME() noexcept { return fMime; }
private:
NodePtr fFile;
Char* fMime{ "application-type/*" };
};
using FileStreamUTF8 = FileStream<char>;
using FileStreamUTF16 = FileStream<wchar_t>;
template <typename Encoding, typename Class>
FileStream<Encoding, Class>::FileStream(const Encoding* path)
: fFile(Class::GetMounted()->Open(path, "r+"))
{}
template <typename Encoding, typename Class>
FileStream<Encoding, Class>::~FileStream() = default;
}
#define node_cast(PTR) reinterpret_cast<hCore::NodePtr>(PTR)
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