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542 lines
19 KiB
542 lines
19 KiB
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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Cd.h
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Abstract:
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This module defines the on-disk structure of the Cdfs file system.
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// @@BEGIN_DDKSPLIT
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Author:
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Brian Andrew [BrianAn] 01-July-1995
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Revision History:
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// @@END_DDKSPLIT
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--*/
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#ifndef _CDFS_
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#define _CDFS_
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//
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// Sector size on Cdrom disks is hard-coded to 2048
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//
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#ifndef SECTOR_SIZE
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#define SECTOR_SIZE (2048)
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#endif
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#define RAW_SECTOR_SIZE (2352)
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#define SECTOR_MASK (SECTOR_SIZE - 1)
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#define INVERSE_SECTOR_MASK ~(SECTOR_SIZE - 1)
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#ifndef SECTOR_SHIFT
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#define SECTOR_SHIFT (11)
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#endif
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#define XA_SECTOR_SIZE (2352)
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//
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// Cdfs file id is a large integer.
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//
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typedef LARGE_INTEGER FILE_ID;
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typedef FILE_ID *PFILE_ID;
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//
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// The following constants are values from the disk.
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//
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#define FIRST_VD_SECTOR (16)
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#define VOL_ID_LEN (5)
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#define ESC_SEQ_LEN (3)
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#define VERSION_1 (1)
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#define VD_TERMINATOR (255)
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#define VD_PRIMARY (1)
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#define VD_SECONDARY (2)
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#define VOLUME_ID_LENGTH (32)
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//
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// Leave the following so that CdfsBoot.c will compile
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//
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#define CD_SECTOR_SIZE (2048)
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#define ISO_VOL_ID "CD001"
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#define HSG_VOL_ID "CDROM"
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#define ISO_ATTR_MULTI 0x0080
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#define ISO_ATTR_DIRECTORY 0x0002
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#define MIN_DIR_REC_SIZE (sizeof( RAW_DIR_REC ) - MAX_FILE_ID_LENGTH)
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#define RVD_STD_ID( r, i ) (i ? r->StandardId : \
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((PRAW_HSG_VD) r)->StandardId )
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#define RVD_DESC_TYPE( r, i ) (i ? r->DescType : \
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((PRAW_HSG_VD) r)->DescType )
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#define RVD_VERSION( r, i ) (i ? r->Version : \
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((PRAW_HSG_VD) r)->Version )
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#define RVD_LB_SIZE( r, i ) (i ? r->LogicalBlkSzI : \
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((PRAW_HSG_VD) r)->LogicalBlkSzI )
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#define RVD_VOL_SIZE( r, i ) (i ? r->VolSpaceI : \
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((PRAW_HSG_VD) r)->VolSpaceI )
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#define RVD_ROOT_DE( r, i ) (i ? r->RootDe : \
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((PRAW_HSG_VD) r)->RootDe )
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#define DE_FILE_FLAGS( iso, de ) (iso ? de->FlagsISO : de->FlagsHSG)
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//
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// Data track flag for track entries in TOC
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//
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#define TOC_DATA_TRACK (0x04)
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#define TOC_LAST_TRACK (0xaa)
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//
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// There is considerable rearrangement of the volume descriptors for
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// ISO and HSG. However, within each standard the same structure can
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// be used for both the primary and secondary descriptors.
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//
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// Both of these structures are aligned correctly so that no
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// special macros will be needed to unpack them.
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//
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//
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// Declaration of length of root directory entry in volume descriptor
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//
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#define LEN_ROOT_DE (34)
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//
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// Maximum length of file ID on the disk. We allow file size beyond the ISO 9660
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// standard.
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//
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#define MAX_FILE_ID_LENGTH (255)
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typedef struct _RAW_ISO_VD {
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UCHAR DescType; // volume type: 1 = standard, 2 = coded
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UCHAR StandardId[5]; // volume structure standard id = CD001
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UCHAR Version; // volume structure version number = 1
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UCHAR VolumeFlags; // volume flags
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UCHAR SystemId[32]; // system identifier
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UCHAR VolumeId[32]; // volume identifier
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UCHAR Reserved[8]; // reserved 8 = 0
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ULONG VolSpaceI; // size of the volume in LBN's Intel
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ULONG VolSpaceM; // size of the volume in LBN's Motorola
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UCHAR CharSet[32]; // character set bytes 0 = ASCII
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USHORT VolSetSizeI; // volume set size Intel
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USHORT VolSetSizeM; // volume set size Motorola
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USHORT VolSeqNumI; // volume set sequence number Intel
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USHORT VolSeqNumM; // volume set sequence number Motorola
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USHORT LogicalBlkSzI; // logical block size Intel
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USHORT LogicalBlkSzM; // logical block size Motorola
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ULONG PathTableSzI; // path table size in bytes Intel
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ULONG PathTableSzM; // path table size in bytes Motorola
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ULONG PathTabLocI[2]; // LBN of 2 path tables Intel
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ULONG PathTabLocM[2]; // LBN of 2 path tables Motorola
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UCHAR RootDe[LEN_ROOT_DE];// dir entry of the root directory
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UCHAR VolSetId[128]; // volume set identifier
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UCHAR PublId[128]; // publisher identifier
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UCHAR PreparerId[128]; // data preparer identifier
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UCHAR AppId[128]; // application identifier
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UCHAR Copyright[37]; // file name of copyright notice
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UCHAR Abstract[37]; // file name of abstract
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UCHAR Bibliograph[37]; // file name of bibliography
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UCHAR CreateDate[17]; // volume creation date and time
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UCHAR ModDate[17]; // volume modification date and time
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UCHAR ExpireDate[17]; // volume expiration date and time
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UCHAR EffectDate[17]; // volume effective date and time
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UCHAR FileStructVer; // file structure version number = 1
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UCHAR Reserved3; // reserved
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UCHAR ResApp[512]; // reserved for application
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UCHAR Reserved4[653]; // remainder of 2048 bytes reserved
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} RAW_ISO_VD;
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typedef RAW_ISO_VD *PRAW_ISO_VD;
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typedef struct _RAW_HSG_VD {
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ULONG BlkNumI; // logical block number Intel
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ULONG BlkNumM; // logical block number Motorola
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UCHAR DescType; // volume type: 1 = standard, 2 = coded
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UCHAR StandardId[5]; // volume structure standard id = CDROM
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UCHAR Version; // volume structure version number = 1
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UCHAR VolumeFlags; // volume flags
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UCHAR SystemId[32]; // system identifier
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UCHAR VolumeId[32]; // volume identifier
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UCHAR Reserved[8]; // reserved 8 = 0
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ULONG VolSpaceI; // size of the volume in LBN's Intel
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ULONG VolSpaceM; // size of the volume in LBN's Motorola
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UCHAR CharSet[32]; // character set bytes 0 = ASCII
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USHORT VolSetSizeI; // volume set size Intel
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USHORT VolSetSizeM; // volume set size Motorola
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USHORT VolSeqNumI; // volume set sequence number Intel
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USHORT VolSeqNumM; // volume set sequence number Motorola
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USHORT LogicalBlkSzI; // logical block size Intel
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USHORT LogicalBlkSzM; // logical block size Motorola
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ULONG PathTableSzI; // path table size in bytes Intel
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ULONG PathTableSzM; // path table size in bytes Motorola
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ULONG PathTabLocI[4]; // LBN of 4 path tables Intel
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ULONG PathTabLocM[4]; // LBN of 4 path tables Motorola
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UCHAR RootDe[LEN_ROOT_DE];// dir entry of the root directory
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UCHAR VolSetId[128]; // volume set identifier
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UCHAR PublId[128]; // publisher identifier
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UCHAR PreparerId[128]; // data preparer identifier
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UCHAR AppId[128]; // application identifier
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UCHAR Copyright[32]; // file name of copyright notice
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UCHAR Abstract[32]; // file name of abstract
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UCHAR CreateDate[16]; // volume creation date and time
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UCHAR ModDate[16]; // volume modification date and time
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UCHAR ExpireDate[16]; // volume expiration date and time
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UCHAR EffectDate[16]; // volume effective date and time
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UCHAR FileStructVer; // file structure version number
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UCHAR Reserved3; // reserved
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UCHAR ResApp[512]; // reserved for application
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UCHAR Reserved4[680]; // remainder of 2048 bytes reserved
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} RAW_HSG_VD;
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typedef RAW_HSG_VD *PRAW_HSG_VD;
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typedef struct _RAW_JOLIET_VD {
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UCHAR DescType; // volume type: 2 = coded
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UCHAR StandardId[5]; // volume structure standard id = CD001
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UCHAR Version; // volume structure version number = 1
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UCHAR VolumeFlags; // volume flags
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UCHAR SystemId[32]; // system identifier
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UCHAR VolumeId[32]; // volume identifier
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UCHAR Reserved[8]; // reserved 8 = 0
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ULONG VolSpaceI; // size of the volume in LBN's Intel
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ULONG VolSpaceM; // size of the volume in LBN's Motorola
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UCHAR CharSet[32]; // character set bytes 0 = ASCII, Joliett Seq here
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USHORT VolSetSizeI; // volume set size Intel
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USHORT VolSetSizeM; // volume set size Motorola
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USHORT VolSeqNumI; // volume set sequence number Intel
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USHORT VolSeqNumM; // volume set sequence number Motorola
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USHORT LogicalBlkSzI; // logical block size Intel
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USHORT LogicalBlkSzM; // logical block size Motorola
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ULONG PathTableSzI; // path table size in bytes Intel
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ULONG PathTableSzM; // path table size in bytes Motorola
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ULONG PathTabLocI[2]; // LBN of 2 path tables Intel
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ULONG PathTabLocM[2]; // LBN of 2 path tables Motorola
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UCHAR RootDe[LEN_ROOT_DE];// dir entry of the root directory
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UCHAR VolSetId[128]; // volume set identifier
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UCHAR PublId[128]; // publisher identifier
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UCHAR PreparerId[128]; // data preparer identifier
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UCHAR AppId[128]; // application identifier
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UCHAR Copyright[37]; // file name of copyright notice
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UCHAR Abstract[37]; // file name of abstract
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UCHAR Bibliograph[37]; // file name of bibliography
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UCHAR CreateDate[17]; // volume creation date and time
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UCHAR ModDate[17]; // volume modification date and time
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UCHAR ExpireDate[17]; // volume expiration date and time
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UCHAR EffectDate[17]; // volume effective date and time
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UCHAR FileStructVer; // file structure version number = 1
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UCHAR Reserved3; // reserved
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UCHAR ResApp[512]; // reserved for application
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UCHAR Reserved4[653]; // remainder of 2048 bytes reserved
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} RAW_JOLIET_VD;
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typedef RAW_JOLIET_VD *PRAW_JOLIET_VD;
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//
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// Macros to access the different volume descriptors.
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//
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#define CdRvdId(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->StandardId : \
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((PRAW_ISO_VD) (R))->StandardId \
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)
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#define CdRvdVersion(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->Version : \
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((PRAW_ISO_VD) (R))->Version \
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)
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#define CdRvdDescType(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->DescType : \
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((PRAW_ISO_VD) (R))->DescType \
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)
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#define CdRvdEsc(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->CharSet : \
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((PRAW_ISO_VD) (R))->CharSet \
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)
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#define CdRvdVolId(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->VolumeId : \
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((PRAW_ISO_VD) (R))->VolumeId \
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)
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#define CdRvdBlkSz(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->LogicalBlkSzI :\
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((PRAW_ISO_VD) (R))->LogicalBlkSzI \
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)
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#define CdRvdPtLoc(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->PathTabLocI[0]:\
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((PRAW_ISO_VD) (R))->PathTabLocI[0] \
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)
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#define CdRvdPtSz(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->PathTableSzI : \
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((PRAW_ISO_VD) (R))->PathTableSzI \
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)
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#define CdRvdDirent(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->RootDe : \
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((PRAW_ISO_VD) (R))->RootDe \
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)
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#define CdRvdVolSz(R,F) ( \
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FlagOn( (F), VCB_STATE_HSG ) ? \
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((PRAW_HSG_VD) (R))->VolSpaceI : \
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((PRAW_ISO_VD) (R))->VolSpaceI \
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)
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//
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// This structure is used to overlay a region of a disk sector
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// to retrieve a single directory entry. There is a difference
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// in the file flags between the ISO and HSG version and a
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// additional byte in the ISO for the offset from Greenwich time.
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//
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// The disk structure is aligned on a word boundary, so any 32
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// bit fields will be represented as an array of 16 bit fields.
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//
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typedef struct _RAW_DIRENT {
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UCHAR DirLen;
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UCHAR XarLen;
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UCHAR FileLoc[4];
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UCHAR FileLocMot[4];
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UCHAR DataLen[4];
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UCHAR DataLenMot[4];
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UCHAR RecordTime[6];
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UCHAR FlagsHSG;
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UCHAR FlagsISO;
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UCHAR IntLeaveSize;
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UCHAR IntLeaveSkip;
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UCHAR Vssn[2];
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UCHAR VssnMot[2];
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UCHAR FileIdLen;
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UCHAR FileId[MAX_FILE_ID_LENGTH];
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} RAW_DIRENT;
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typedef RAW_DIRENT RAW_DIR_REC;
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typedef RAW_DIRENT *PRAW_DIR_REC;
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typedef RAW_DIRENT *PRAW_DIRENT;
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#define CD_ATTRIBUTE_HIDDEN (0x01)
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#define CD_ATTRIBUTE_DIRECTORY (0x02)
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#define CD_ATTRIBUTE_ASSOC (0x04)
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#define CD_ATTRIBUTE_MULTI (0x80)
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#define CD_BASE_YEAR (1900)
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#define MIN_RAW_DIRENT_LEN (FIELD_OFFSET( RAW_DIRENT, FileId ) + 1)
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#define BYTE_COUNT_8_DOT_3 (24)
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#define SHORT_NAME_SHIFT (5)
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//
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// The following macro recovers the correct flag field.
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//
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#define CdRawDirentFlags(IC,RD) ( \
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FlagOn( (IC)->Vcb->VcbState, VCB_STATE_HSG) ? \
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(RD)->FlagsHSG : \
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(RD)->FlagsISO \
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)
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//
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// The following macro converts from CD time to NT time. On ISO
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// 9660 media, we now pay attention to the GMT offset (integer
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// increments of 15 minutes offset from GMT). HSG does not record
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// this field.
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//
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// The restriction to the interval [-48, 52] comes from 9660 8.4.26.1
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//
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// VOID
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// CdConvertCdTimeToNtTime (
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// IN PIRP_CONTEXT IrpContext,
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// IN PCHAR CdTime,
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// OUT PLARGE_INTEGER NtTime
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// );
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//
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#define GMT_OFFSET_TO_NT ((LONGLONG) 15 * 60 * 1000 * 1000 * 10)
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#define CdConvertCdTimeToNtTime(IC,CD,NT) { \
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TIME_FIELDS _TimeField; \
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CHAR GmtOffset; \
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_TimeField.Year = (CSHORT) *((PCHAR) CD) + CD_BASE_YEAR; \
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_TimeField.Month = (CSHORT) *(Add2Ptr( CD, 1, PCHAR )); \
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_TimeField .Day = (CSHORT) *(Add2Ptr( CD, 2, PCHAR )); \
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_TimeField.Hour = (CSHORT) *(Add2Ptr( CD, 3, PCHAR )); \
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_TimeField.Minute = (CSHORT) *(Add2Ptr( CD, 4, PCHAR )); \
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_TimeField.Second = (CSHORT) *(Add2Ptr( CD, 5, PCHAR )); \
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_TimeField.Milliseconds = (CSHORT) 0; \
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RtlTimeFieldsToTime( &_TimeField, NT ); \
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if (!FlagOn((IC)->Vcb->VcbState, VCB_STATE_HSG) && \
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((GmtOffset = *(Add2Ptr( CD, 6, PCHAR ))) != 0 ) && \
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(GmtOffset >= -48 && GmtOffset <= 52)) { \
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(NT)->QuadPart += -GmtOffset * GMT_OFFSET_TO_NT; \
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} \
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}
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//
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// The on-disk representation of a Path Table entry differs between
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// the ISO version and the HSG version. The fields are the same
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// and the same size, but the positions are different.
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//
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typedef struct _RAW_PATH_ISO {
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UCHAR DirIdLen;
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UCHAR XarLen;
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USHORT DirLoc[2];
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USHORT ParentNum;
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UCHAR DirId[MAX_FILE_ID_LENGTH];
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} RAW_PATH_ISO;
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typedef RAW_PATH_ISO *PRAW_PATH_ISO;
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typedef RAW_PATH_ISO RAW_PATH_ENTRY;
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typedef RAW_PATH_ISO *PRAW_PATH_ENTRY;
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typedef struct _RAW_PATH_HSG {
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USHORT DirLoc[2];
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UCHAR XarLen;
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UCHAR DirIdLen;
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USHORT ParentNum;
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UCHAR DirId[MAX_FILE_ID_LENGTH];
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} RAW_PATH_HSG;
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typedef RAW_PATH_HSG *PRAW_PATH_HSG;
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#define MIN_RAW_PATH_ENTRY_LEN (FIELD_OFFSET( RAW_PATH_ENTRY, DirId ) + 1)
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//
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// The following macros are used to recover the different fields of the
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// Path Table entries. The macro to recover the disk location of the
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// directory must copy it into a different variable for alignment reasons.
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//
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// CdRawPathIdLen - Length of directory name in bytes
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// CdRawPathXar - Number of Xar blocks
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// CdRawPathLoc - Address of unaligned ulong for disk offset in blocks
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//
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#define CdRawPathIdLen(IC, RP) ( \
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FlagOn( (IC)->Vcb->VcbState, VCB_STATE_HSG ) ? \
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((PRAW_PATH_HSG) (RP))->DirIdLen : \
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(RP)->DirIdLen \
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)
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#define CdRawPathXar(IC, RP) ( \
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FlagOn( (IC)->Vcb->VcbState, VCB_STATE_HSG ) ? \
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((PRAW_PATH_HSG) (RP))->XarLen : \
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(RP)->XarLen \
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)
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#define CdRawPathLoc(IC, RP) ( \
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FlagOn( (IC)->Vcb->VcbState, VCB_STATE_HSG ) ? \
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((PRAW_PATH_HSG) (RP))->DirLoc : \
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(RP)->DirLoc \
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)
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//
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// System use are for XA data. The following is the system use area for
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// directory entries on XA data disks.
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//
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typedef struct _SYSTEM_USE_XA {
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//
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// Owner ID. Not used in this version.
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//
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UCHAR OwnerId[4];
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//
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// Extent attributes. Only interested if mode2 form2 or digital audio.
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// This is stored big endian. We will define the attribute flags so
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// we can ignore this fact.
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//
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USHORT Attributes;
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//
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// XA signature. This value must be 'XA'.
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//
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USHORT Signature;
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//
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// File Number.
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//
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UCHAR FileNumber;
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//
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// Not used in this version.
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//
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UCHAR Reserved[5];
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} SYSTEM_USE_XA;
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typedef SYSTEM_USE_XA *PSYSTEM_USE_XA;
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#define SYSTEM_USE_XA_FORM1 (0x0008)
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#define SYSTEM_USE_XA_FORM2 (0x0010)
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#define SYSTEM_USE_XA_DA (0x0040)
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#define SYSTEM_XA_SIGNATURE (0x4158)
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typedef enum _XA_EXTENT_TYPE {
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Form1Data = 0,
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Mode2Form2Data,
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CDAudio
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} XA_EXTENT_TYPE;
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typedef XA_EXTENT_TYPE *PXA_EXTENT_TYPE;
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#endif // _CDFS_
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