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Annotation of ntddk/src/scsi/qic117/selecttd.c, revision 1.1.1.1

1.1       root        1: /*++
                      2: 
                      3: Copyright (c) 1993 - Colorado Memory Systems, Inc.
                      4: All Rights Reserved
                      5: 
                      6: Module Name:
                      7: 
                      8:     selecttd.c
                      9: 
                     10: Abstract:
                     11: 
                     12:     Is analogous to SelVol() but instead of selecting a volume, selects
                     13:     the tape directory 'volume'.
                     14: 
                     15: Revision History:
                     16: 
                     17: 
                     18: 
                     19: 
                     20: --*/
                     21: 
                     22: //
                     23: // include files
                     24: //
                     25: 
                     26: #include <ntddk.h>
                     27: #include <ntddtape.h>
                     28: #include "common.h"
                     29: #include "q117.h"
                     30: #include "protos.h"
                     31: 
                     32: 
                     33: STATUS
                     34: q117SelectTD(
                     35:     IN OUT PQ117_CONTEXT Context
                     36:     )
                     37: 
                     38: /*++
                     39: 
                     40: Routine Description:
                     41: 
                     42:     This routine is analogous to SelectVol(), and is called before the
                     43:     first call to ReadVolumeEntry().
                     44: 
                     45: Arguments:
                     46: 
                     47:     Context -
                     48: 
                     49: Return Value:
                     50: 
                     51:     NoErr, any Driver error except BadBlk, <EndOfVol>, RdncUnsc (because
                     52:     the bad block map is skipped over.
                     53: 
                     54: --*/
                     55: 
                     56: {
                     57:     STATUS ret;                 // Return value from other routines called.
                     58:     VOLUME_TABLE_ENTRY temp;
                     59: 
                     60:     //
                     61:     // Zero the active volume and end of tape.  This is probably extraneous.
                     62:     //
                     63:     Context->ActiveVolumeNumber=0;
                     64:     Context->CurrentOperation.EndOfUsedTape=0;
                     65: 
                     66:     //
                     67:     // Make a fake volume entry to read the volume directory
                     68:     //
                     69:     temp.StartSegment = Context->CurrentTape.VolumeSegment;
                     70:     temp.EndingSegment = temp.StartSegment;
                     71:     temp.StacCompress = FALSE;
                     72:     temp.VendorSpecific = FALSE;
                     73:     temp.CompressSwitch = FALSE;
                     74:     temp.DirectorySize = 0;
                     75:     temp.DataSize = q117GoodDataBytes(temp.StartSegment, Context);
                     76: 
                     77: #ifndef NO_MARKS
                     78: 
                     79:     //
                     80:     // Clear all possibility of hitting a set mark
                     81:     //
                     82:     Context->CurrentMark = Context->MarkArray.TotalMarks = 0;
                     83:     Context->MarkArray.MarkEntry[Context->CurrentMark].Offset = 0xffffffff;
                     84: 
                     85: #endif
                     86: 
                     87:     if (ret=q117SelVol(&temp,Context)) {
                     88:         return(ret);
                     89:     }
                     90: 
                     91:     if (Context->tapedir) {
                     92: 
                     93:         ret = q117ReconstructSegment(Context->tapedir,Context);
                     94: 
                     95:         Context->CurrentOperation.SegmentPointer = Context->tapedir->Data;
                     96:         Context->CurrentOperation.SegmentBytesRemaining = q117GoodDataBytes(temp.StartSegment, Context);
                     97:     }
                     98: 
                     99:     return(ret);
                    100: }

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