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95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
#pragma once
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#include "FileSystem.h"
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#include "UnixTypes.h"
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#include <AK/HashMap.h>
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class SynthFSInode;
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class SynthFS : public FS {
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public:
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virtual ~SynthFS() override;
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static RetainPtr<SynthFS> create();
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virtual bool initialize() override;
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virtual const char* class_name() const override;
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virtual InodeIdentifier root_inode() const override;
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virtual RetainPtr<Inode> create_inode(InodeIdentifier parentInode, const String& name, mode_t, unsigned size, int& error) override;
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virtual RetainPtr<Inode> create_directory(InodeIdentifier parentInode, const String& name, mode_t, int& error) override;
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virtual RetainPtr<Inode> get_inode(InodeIdentifier) const override;
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protected:
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typedef unsigned InodeIndex;
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InodeIndex generate_inode_index();
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static constexpr InodeIndex RootInodeIndex = 1;
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SynthFS();
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RetainPtr<SynthFSInode> create_directory(String&& name);
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RetainPtr<SynthFSInode> create_text_file(String&& name, ByteBuffer&&, mode_t = 0010644);
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RetainPtr<SynthFSInode> create_generated_file(String&& name, Function<ByteBuffer(SynthFSInode&)>&&, mode_t = 0100644);
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RetainPtr<SynthFSInode> create_generated_file(String&& name, Function<ByteBuffer(SynthFSInode&)>&&, Function<ssize_t(SynthFSInode&, const ByteBuffer&)>&&, mode_t = 0100644);
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InodeIdentifier add_file(RetainPtr<SynthFSInode>&&, InodeIndex parent = RootInodeIndex);
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bool remove_file(InodeIndex);
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private:
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InodeIndex m_next_inode_index { 2 };
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HashMap<InodeIndex, RetainPtr<SynthFSInode>> m_inodes;
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mutable Lock m_lock;
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};
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struct SynthFSInodeCustomData {
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virtual ~SynthFSInodeCustomData();
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};
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class SynthFSInode final : public Inode {
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friend class SynthFS;
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friend class DevPtsFS;
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public:
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virtual ~SynthFSInode() override;
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void set_custom_data(OwnPtr<SynthFSInodeCustomData>&& custom_data) { m_custom_data = move(custom_data); }
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SynthFSInodeCustomData* custom_data() { return m_custom_data.ptr(); }
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const SynthFSInodeCustomData* custom_data() const { return m_custom_data.ptr(); }
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private:
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// ^Inode
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virtual ssize_t read_bytes(off_t, size_t, byte* buffer, FileDescriptor*) const override;
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virtual InodeMetadata metadata() const override;
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virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) const override;
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virtual InodeIdentifier lookup(const String& name) override;
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virtual String reverse_lookup(InodeIdentifier) override;
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virtual void flush_metadata() override;
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virtual ssize_t write_bytes(off_t, size_t, const byte* buffer, FileDescriptor*) override;
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virtual bool add_child(InodeIdentifier child_id, const String& name, byte file_type, int& error) override;
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virtual bool remove_child(const String& name, int& error) override;
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virtual RetainPtr<Inode> parent() const override;
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virtual size_t directory_entry_count() const override;
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virtual bool chmod(mode_t, int& error) override;
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SynthFS& fs();
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const SynthFS& fs() const;
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SynthFSInode(SynthFS&, unsigned index);
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String m_name;
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InodeIdentifier m_parent;
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ByteBuffer m_data;
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Function<ByteBuffer(SynthFSInode&)> m_generator;
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Function<ssize_t(SynthFSInode&, const ByteBuffer&)> m_write_callback;
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Vector<SynthFSInode*> m_children;
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InodeMetadata m_metadata;
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OwnPtr<SynthFSInodeCustomData> m_custom_data;
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};
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inline SynthFS& SynthFSInode::fs()
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{
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return static_cast<SynthFS&>(Inode::fs());
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}
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inline const SynthFS& SynthFSInode::fs() const
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{
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return static_cast<const SynthFS&>(Inode::fs());
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}
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