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#pragma once
#include "VirtualFileSystem.h"
#include "InodeMetadata.h"
#include <AK/ByteBuffer.h>
#include <AK/Retainable.h>
#ifdef SERENITY
class TTY;
#endif
class FileDescriptor : public Retainable<FileDescriptor> {
public:
static RetainPtr<FileDescriptor> create(RetainPtr<VirtualFileSystem::Node>&&);
~FileDescriptor();
RetainPtr<FileDescriptor> clone();
int close();
Unix::off_t seek(Unix::off_t, int whence);
Unix::ssize_t read(byte*, Unix::size_t);
Unix::ssize_t write(const byte* data, Unix::size_t);
int stat(Unix::stat*);
bool hasDataAvailableForRead();
ssize_t get_dir_entries(byte* buffer, Unix::size_t);
ByteBuffer readEntireFile();
String absolute_path() const;
bool isDirectory() const;
#ifdef SERENITY
bool isTTY() const;
const TTY* tty() const;
TTY* tty();
#endif
InodeMetadata metadata() const { return m_vnode->metadata(); }
VirtualFileSystem::Node* vnode() { return m_vnode.ptr(); }
#ifdef SERENITY
bool isBlocking() const { return m_isBlocking; }
void setBlocking(bool b) { m_isBlocking = b; }
#endif
ByteBuffer& generatorCache() { return m_generatorCache; }
private:
friend class VirtualFileSystem;
explicit FileDescriptor(RetainPtr<VirtualFileSystem::Node>&&);
RetainPtr<VirtualFileSystem::Node> m_vnode;
Unix::off_t m_currentOffset { 0 };
ByteBuffer m_generatorCache;
#ifdef SERENITY
bool m_isBlocking { true };
#endif
};
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