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typedef struct MetaBlock MetaBlock;
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typedef struct MetaEntry MetaEntry;
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#define MaxBlock (1UL<<31)
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enum {
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	BytesPerEntry = 100,	/* estimate of bytes per dir entries - determines number of index entries in the block */
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	FullPercentage = 80,	/* don't allocate in block if more than this percentage full */
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	FlushSize = 200,	/* number of blocks to flush */
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	DirtyPercentage = 50	/* maximum percentage of dirty blocks */
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};
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struct MetaEntry
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{
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	uchar *p;
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	ushort size;
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};
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struct MetaBlock
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{
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	int maxsize;		/* size of block */
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	int size;		/* size used */
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	int free;		/* free space within used size */
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	int maxindex;		/* entries allocated for table */
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	int nindex;		/* amount of table used */
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	int unbotch;
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	uchar *buf;
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};
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struct VacDirEnum
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{
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	VacFile *file;
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	u32int boff;
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	int i, n;
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	VacDir *buf;
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};
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