FreeBSD/Linux Kernel Cross Reference
sys/fs/ntfs/bitmap.h

     /*
      * bitmap.h - Defines for NTFS kernel bitmap handling.  Part of the Linux-NTFS
      *            project.
      *
      * Copyright (c) 2004 Anton Altaparmakov
      *
      * This program/include file is free software; you can redistribute it and/or
      * modify it under the terms of the GNU General Public License as published
      * by the Free Software Foundation; either version 2 of the License, or
     * (at your option) any later version.
     *
     * This program/include file is distributed in the hope that it will be
     * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
     * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program (in the main directory of the Linux-NTFS
     * distribution in the file COPYING); if not, write to the Free Software
     * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     */
    
    #ifndef _LINUX_NTFS_BITMAP_H
    #define _LINUX_NTFS_BITMAP_H
    
    #ifdef NTFS_RW
    
    #include <linux/fs.h>
    
    #include "types.h"
    
    extern int __ntfs_bitmap_set_bits_in_run(struct inode *vi, const s64 start_bit,
                    const s64 count, const u8 value, const bool is_rollback);
    
    /**
     * ntfs_bitmap_set_bits_in_run - set a run of bits in a bitmap to a value
     * @vi:                 vfs inode describing the bitmap
     * @start_bit:          first bit to set
     * @count:              number of bits to set
     * @value:              value to set the bits to (i.e. 0 or 1)
     *
     * Set @count bits starting at bit @start_bit in the bitmap described by the
     * vfs inode @vi to @value, where @value is either 0 or 1.
     *
     * Return 0 on success and -errno on error.
     */
    static inline int ntfs_bitmap_set_bits_in_run(struct inode *vi,
                    const s64 start_bit, const s64 count, const u8 value)
    {
            return __ntfs_bitmap_set_bits_in_run(vi, start_bit, count, value,
                            false);
    }
    
    /**
     * ntfs_bitmap_set_run - set a run of bits in a bitmap
     * @vi:         vfs inode describing the bitmap
     * @start_bit:  first bit to set
     * @count:      number of bits to set
     *
     * Set @count bits starting at bit @start_bit in the bitmap described by the
     * vfs inode @vi.
     *
     * Return 0 on success and -errno on error.
     */
    static inline int ntfs_bitmap_set_run(struct inode *vi, const s64 start_bit,
                    const s64 count)
    {
            return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 1);
    }
    
    /**
     * ntfs_bitmap_clear_run - clear a run of bits in a bitmap
     * @vi:         vfs inode describing the bitmap
     * @start_bit:  first bit to clear
     * @count:      number of bits to clear
     *
     * Clear @count bits starting at bit @start_bit in the bitmap described by the
     * vfs inode @vi.
     *
     * Return 0 on success and -errno on error.
     */
    static inline int ntfs_bitmap_clear_run(struct inode *vi, const s64 start_bit,
                    const s64 count)
    {
            return ntfs_bitmap_set_bits_in_run(vi, start_bit, count, 0);
    }
    
    /**
     * ntfs_bitmap_set_bit - set a bit in a bitmap
     * @vi:         vfs inode describing the bitmap
     * @bit:        bit to set
     *
     * Set bit @bit in the bitmap described by the vfs inode @vi.
     *
     * Return 0 on success and -errno on error.
     */
    static inline int ntfs_bitmap_set_bit(struct inode *vi, const s64 bit)
    {
            return ntfs_bitmap_set_run(vi, bit, 1);
   }
   
   /**
    * ntfs_bitmap_clear_bit - clear a bit in a bitmap
    * @vi:         vfs inode describing the bitmap
    * @bit:        bit to clear
    *
    * Clear bit @bit in the bitmap described by the vfs inode @vi.
    *
    * Return 0 on success and -errno on error.
    */
   static inline int ntfs_bitmap_clear_bit(struct inode *vi, const s64 bit)
   {
           return ntfs_bitmap_clear_run(vi, bit, 1);
   }
   
   #endif /* NTFS_RW */
   
   #endif /* defined _LINUX_NTFS_BITMAP_H */

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