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/*

 *  linux/fs/xiafs/xiafs_mac.h

 *

 *  Copyright (C) Q. Frank Xia, 1993.

 */

extern char internal_error_message[];

#define INTERN_ERR              internal_error_message, __FILE__, __LINE__

#define WHERE_ERR               __FILE__, __LINE__

#define XIAFS_ZSHIFT(sp)                ((sp)->u.xiafs_sb.s_zone_shift)

#define XIAFS_ZSIZE(sp)         (BLOCK_SIZE << XIAFS_ZSHIFT(sp))

#define XIAFS_ZSIZE_BITS(sp)    (BLOCK_SIZE_BITS + XIAFS_ZSHIFT(sp))

#define XIAFS_ADDRS_PER_Z(sp)           (BLOCK_SIZE >> (2 - XIAFS_ZSHIFT(sp)))

#define XIAFS_ADDRS_PER_Z_BITS(sp)      (BLOCK_SIZE_BITS - 2 + XIAFS_ZSHIFT(sp))

#define XIAFS_BITS_PER_Z(sp)    (BLOCK_SIZE  << (3 + XIAFS_ZSHIFT(sp)))

#define XIAFS_BITS_PER_Z_BITS(sp)       (BLOCK_SIZE_BITS + 3 + XIAFS_ZSHIFT(sp))

#define XIAFS_INODES_PER_Z(sp)  (_XIAFS_INODES_PER_BLOCK << XIAFS_ZSHIFT(sp))

/* Use the most significant bytes of zone pointers to store block counter. */

/* This is ugly, but it works. Note, We have another 7 bytes for "expansion". */

#define XIAFS_GET_BLOCKS(row_ip, blocks)  \

  blocks=((((row_ip)->i_zone[0] >> 24) & 0xff )|\

          (((row_ip)->i_zone[1] >> 16) & 0xff00 )|\

          (((row_ip)->i_zone[2] >>  8) & 0xff0000 ) )

/* XIAFS_PUT_BLOCKS should be called before saving zone pointers */

#define XIAFS_PUT_BLOCKS(row_ip, blocks)  \

  (row_ip)->i_zone[2]=((blocks)<< 8) & 0xff000000;\

  (row_ip)->i_zone[1]=((blocks)<<16) & 0xff000000;\

  (row_ip)->i_zone[0]=((blocks)<<24) & 0xff000000