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#include	<u.h>
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#include	<libc.h>
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#include	<bio.h>
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int
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Bbuffered(Biobufhdr *bp)
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{
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	switch(bp->state) {
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	case Bracteof:
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	case Bractive:
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		return -bp->icount;
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	case Bwactive:
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		return bp->bsize + bp->ocount;
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	case Binactive:
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		return 0;
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	}
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	fprint(2, "Bbuffered: unknown state %d\n", bp->state);
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	return 0;
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}