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