/*
 * Copyright 2017, Chế Vũ Gia Hy, cvghy116@gmail.com.
 * Copyright 2001-2009, Axel Dörfler, axeld@pinc-software.de.
 * This file may be used under the terms of the MIT License.
 */
#ifndef UTILITY_H
#define UTILITY_H


#include "btrfs.h"


enum inode_type {
        S_DIRECTORY             = S_IFDIR,
        S_FILE                  = S_IFREG,
        S_SYMLINK               = S_IFLNK,

        S_INDEX_TYPES   = (S_STR_INDEX | S_INT_INDEX | S_UINT_INDEX
                                                | S_LONG_LONG_INDEX | S_ULONG_LONG_INDEX
                                                | S_FLOAT_INDEX | S_DOUBLE_INDEX),

        S_EXTENDED_TYPES = (S_ATTR_DIR | S_ATTR | S_INDEX_DIR)
};


inline uint8
get_filetype(int32 mode)
{
        mode &= S_IFMT;
        switch (mode)
        {
                case S_IFSOCK:
                        return BTRFS_FILETYPE_SOCKET;
                case S_IFLNK:
                        return BTRFS_FILETYPE_SYMLINK;
                case S_IFREG:
                        return BTRFS_FILETYPE_REGULAR;
                case S_IFBLK:
                        return BTRFS_FILETYPE_BLKDEV;
                case S_IFDIR:
                        return BTRFS_FILETYPE_DIRECTORY;
                case S_IFCHR:
                        return BTRFS_FILETYPE_CHRDEV;
                case S_IFIFO:
                        return BTRFS_FILETYPE_FIFO;
                default:
                        return BTRFS_FILETYPE_UNKNOWN;
        }
}


/*!     Converts the open mode, the open flags given to bfs_open(), into
        access modes, e.g. since O_RDONLY requires read access to the
        file, it will be converted to R_OK.
*/
inline int
open_mode_to_access(int openMode)
{
        openMode &= O_RWMASK;
        if (openMode == O_RDONLY)
                return R_OK;
        if (openMode == O_WRONLY)
                return W_OK;

        return R_OK | W_OK;
}


#endif  // UTILITY_H