125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
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/*++
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Copyright (c) 1993 - Colorado Memory Systems, Inc.
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All Rights Reserved
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Module Name:
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settpst.c
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Abstract:
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Calculates the number of bytes of data available on the tape (accounting
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for bad sectors)
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Revision History:
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--*/
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//
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// include files
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//
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#include <ntddk.h>
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#include <ntddtape.h>
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#include "common.h"
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#include "q117.h"
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#include "protos.h"
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#define FCT_ID 0x0120
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VOID
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q117SetTpSt(
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PQ117_CONTEXT Context
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)
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/*++
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Routine Description:
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Uses the globals CurrentOperation.EndOfUsedTape,
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and CurrentTape.BadSectors to set the
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Media Parameters.
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Arguments:
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Context -
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Return Value:
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None
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--*/
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{
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ULONG numgood,numbad;
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SEGMENT segmentIndex;
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SEGMENT lastSegment;
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ULONG BytesUsed;
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//
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// If we have read to the end of the volume segment
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//
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if (Context->CurrentOperation.EndOfUsedTape) {
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//
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// Count the number of used sectors
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//
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lastSegment = Context->CurrentOperation.EndOfUsedTape;
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numgood = 0;
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for (segmentIndex = 0 ; segmentIndex <= lastSegment ; ++segmentIndex) {
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numbad = q117CountBits(Context, segmentIndex, 0l);
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if (BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad > 0 &&
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segmentIndex > Context->CurrentTape.VolumeSegment) {
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numgood += BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad;
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}
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}
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BytesUsed = numgood * BYTES_PER_SECTOR;
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numgood = 0;
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lastSegment = Context->CurrentTape.LastSegment;
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for (;segmentIndex<=lastSegment;++segmentIndex) {
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numbad = q117CountBits(Context, segmentIndex, 0l);
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if (BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad > 0) {
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numgood += BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad;
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}
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}
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Context->CurrentTape.MediaInfo->Remaining.LowPart =
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numgood * BYTES_PER_SECTOR;
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Context->CurrentTape.MediaInfo->Remaining.HighPart = 0;
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Context->CurrentTape.MediaInfo->Capacity.LowPart =
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Context->CurrentTape.MediaInfo->Remaining.LowPart + BytesUsed;
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Context->CurrentTape.MediaInfo->Capacity.HighPart = 0;
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Context->CurrentTape.MediaInfo->BlockSize = BYTES_PER_SECTOR;
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Context->CurrentTape.MediaInfo->PartitionCount = 0;
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} else {
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CheckedDump(QIC117INFO,("q117SetTpSt: endblock not set\n"));
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}
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}
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