Luna/kernel/include/fs/TmpFS.h

#pragma once
#include "fs/VFS.h"

namespace TmpFSImpl
{
    ssize_t read(VFS::Node* node, size_t offset, size_t size, char* buffer);
    ssize_t write(VFS::Node* node, size_t offset, size_t size, char* buffer);
    VFS::Node* find(VFS::Node* node, const char* filename);
    VFS::Node* readdir(VFS::Node* node, long index);
    int mkdir(VFS::Node* node, const char* filename, mode_t mode);
}

class TmpFS
{
  public:
    VFS::Node* root()
    {
        return m_root;
    }

    static TmpFS* create(const char* name);
    static void release(TmpFS* fs);

    ssize_t read(VFS::Node* node, size_t offset, size_t size, char* buffer);
    ssize_t write(VFS::Node* node, size_t offset, size_t size, char* buffer);

    VFS::Node* find(VFS::Node* node, const char* filename);
    VFS::Node* readdir(VFS::Node* node, long index);

    int mkdir(VFS::Node* node, const char* filename, mode_t mode);

    void purge();

  private:
    struct File
    {
        char* buf;
        size_t len;
        int valid;
    };

    struct Directory
    {
        VFS::Node* buf;
        size_t len;
        int valid;
    };

    template <typename T> struct Array
    {
        T* buf;
        size_t len;
    };

    TmpFS(const char* name);
    Array<File> m_files;
    Array<Directory> m_dirs;
    VFS::Node* m_root;
};