globals.c

存取UDF格式的DVD光盘的驱动程序

#include "../nsrHdrs/nsr.h"
#include "chkudf.h"
#include <malloc.h>
#include <stdio.h>

/*****************************************************************************
 * Device operating parameters
 *
 * These are globals used when referencing the device or image file.
 ---------------------------------------------------------------------------*/

UINT32  blocksize = 0;               //bytes per sector
MUINT8  bdivshift = 0;               //log2(blocksize)
UINT32  secsize = 0;                 //bytes per sector
MUINT8  sdivshift = 0;               //log2(secsize)
MUINT8  s_per_b = 1;                 //blocksize/secsize
UINT32  packet_size;                 //blocking factor for read operations
BOOL    scsi = FALSE;                //Boolean for command selection
int     device = 0;                  //Device/file handle for operations
UINT32  LastSector = 0;              //Location of the last readable sector
BOOL    LastSectorAccurate = FALSE;  //Indication of confidence
UINT32  SS = 0;                      //Start of last session
BOOL	isType5 = FALSE;             //Is a CD or DVD drive
BOOL    isCDRW = FALSE;

UINT8   *scsibuf = NULL;             //Used for scsi scratchpad
UINT32  scsibufsize = 0;             //amount allocated for SCSI buffer
UINT8   cdb[12];                     //command buffer
UINT8   sensedata[18];               //Sense data buffer
int     sensebufsize = 18;           //Sense data buffer size

/*****************************************************************************
 * chkudf operating parameters
 *
 * These are globals used by low level routines within chkudf, and aren't
 * directly related to the file system.
 ---------------------------------------------------------------------------*/

sCacheData Cache[NUM_CACHE];
MUINT8     bufno = 0;
sError     Error = {0, 0, 0, 0};
char *Error_Msgs[] = {"Expected Tag ID of %d, found %d",                 /* 1 */
                      "Expected Tag location of %08x, read %08x",
                      "Expected Tag checksum of %02x, computed %02x",
                      "Expected Tag CRC of %04x, found %04x",
                      "Not an Anchor Volume Descriptor Pointer",         /* 5 */
                      "%d sectors did not contain a volume descriptor matching %d",
                      "Either a non-valid structure or terminating descriptor was encountered",
                      "This program can handle %d partitions and the logical volume has %d",
                      "Error reading sector",
                      "No VAT present",                                 /* 10 */
                      "Not able to allocate memory for VAT",
                      "No virtual space described",
                      "No file set descriptor found",
                      "Tag CRC length limit is %04x, found %04x",
                      "Volume Descriptor Sequences are not equivalent", /* 15 */
                      "Anchor Volume Descriptor Pointers are not equivalent",
                      "Volume Space overlap detected",
                      "No sparable partition present",
                      "NSR descriptor version should be %d, was %d",
                      "Not able to allocate memory for Sparing Map",    /* 20 */
                      "Specified location does not contain a Sparing Map",
                      "Volume Descriptor Sequence not found",
                      "Can't allocate memory for Volume Descriptors",
                      "Partition Space overlap detected",
                      "No more memory for ICB tracking available",      /* 25 */
                      "Expected Allocation Descriptors for %d bytes, found %d",
                      "%d Partitions found, Partition Reference Number %d out of range",
                      "%d blocks in Partition, Logical Block Number %d out of range",
                      "Adjacent Allocation Descriptors found (descriptor for %d)",
                      "Expected Serial number of %d, found %d. (disabling reporting)"
};



/*****************************************************************************
 * UDF basics
 *
 * These are globals used by the bottom level checking; used for both parts
 * 3 and 4.
 ---------------------------------------------------------------------------*/

UINT16     UDF_Version;
BOOL       Version_OK = FALSE;
UINT16     Serial_No;
BOOL       Serial_OK = FALSE;
BOOL       Fatal = FALSE;


/*****************************************************************************
 * Volume information
 *
 * These are globals used by the Volume Space checker and are also used
 * to locate the file system when part 4 is checked.
 ---------------------------------------------------------------------------*/

UINT32       VDS_Loc, VDS_Len, RVDS_Loc, RVDS_Len;
sPart_Info   Part_Info[NUM_PARTS];
UINT16       PTN_no;             //The number of partition maps in the volume
dstring      LogVolID[128];      //The logical volume ID
MUINT32      VolSpaceListLen = 0; 
struct extent_ad_name VolSpace[MAX_VOL_EXTS];
UINT32      *VAT;
UINT32       VATLength;

/*****************************************************************************
 * File System information
 *
 * These are globals used by the File System checker
 ---------------------------------------------------------------------------*/
struct long_ad FSD;
struct long_ad RootDirICB;
sICB_trk      *ICBlist = NULL;
MUINT32        ICBlist_len = 0;
MUINT32        ICBlist_alloc = 0;
UINT32         ID_Dirs = 0;           //Number of dirs according to LVID
UINT32         ID_Files = 0;          //Number of files according to LVID
UINT32         ID_UID = 0;            //Highest Unique ID according to LVID
UINT32         Num_Dirs = 0;          //Number of dirs by our count
UINT32         Num_Files = 0;         //Number of files by our count
UINT32         Num_Type_Err = 0;
UINT32         FID_Loc_Wrong = 0;