32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
/*
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* linux/fs/xiafs/xiafs_mac.h
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*
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* Copyright (C) Q. Frank Xia, 1993.
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*/
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extern char internal_error_message[];
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#define INTERN_ERR internal_error_message, __FILE__, __LINE__
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#define WHERE_ERR __FILE__, __LINE__
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#define XIAFS_ZSHIFT(sp) ((sp)->u.xiafs_sb.s_zone_shift)
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#define XIAFS_ZSIZE(sp) (BLOCK_SIZE << XIAFS_ZSHIFT(sp))
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#define XIAFS_ZSIZE_BITS(sp) (BLOCK_SIZE_BITS + XIAFS_ZSHIFT(sp))
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#define XIAFS_ADDRS_PER_Z(sp) (BLOCK_SIZE >> (2 - XIAFS_ZSHIFT(sp)))
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#define XIAFS_ADDRS_PER_Z_BITS(sp) (BLOCK_SIZE_BITS - 2 + XIAFS_ZSHIFT(sp))
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#define XIAFS_BITS_PER_Z(sp) (BLOCK_SIZE << (3 + XIAFS_ZSHIFT(sp)))
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#define XIAFS_BITS_PER_Z_BITS(sp) (BLOCK_SIZE_BITS + 3 + XIAFS_ZSHIFT(sp))
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#define XIAFS_INODES_PER_Z(sp) (_XIAFS_INODES_PER_BLOCK << XIAFS_ZSHIFT(sp))
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/* Use the most significant bytes of zone pointers to store block counter. */
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/* This is ugly, but it works. Note, We have another 7 bytes for "expension". */
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#define XIAFS_GET_BLOCKS(row_ip, blocks) \
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blocks=((((row_ip)->i_zone[0] >> 24) & 0xff )|\
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(((row_ip)->i_zone[1] >> 16) & 0xff00 )|\
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(((row_ip)->i_zone[2] >> 8) & 0xff0000 ) )
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/* XIAFS_PUT_BLOCKS should be called before saving zone pointers */
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#define XIAFS_PUT_BLOCKS(row_ip, blocks) \
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(row_ip)->i_zone[2]=((blocks)<< 8) & 0xff000000;\
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(row_ip)->i_zone[1]=((blocks)<<16) & 0xff000000;\
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(row_ip)->i_zone[0]=((blocks)<<24) & 0xff000000
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