home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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 "expension". */
-
- #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
-