Category : Files from Magazines
Archive : CUJ9411.ZIP
Filename : BLOCK.H
Output of file : BLOCK.H contained in archive : CUJ9411.ZIP
* block.h
*
* IOCTL for block devices
* ------------------------------------------------- */
#ifndef __BLOCK_H
#define __BLOCK_H
#include
#include "iostruct.h"
#include "iobase.h"
//Converts ASCII drive letter designator ('A') to
//IOCTL "1-Based" drive numbers, which maps drive A:
//to 1, B = 2, etc. and uses 0 as the default drive.
//
#define DRIVE_CODE(d) ((toupper(d)-'A')+1)
#define DEFAULT_DRIVE 0
class IoctlBlock : public IoctlBase {
protected:
unsigned drive_info( int drive );
int block_ioctl( block_cmd, void * );
unsigned ioctl_data( ioctl_cmd, unsigned, void *);
int format_track( int, int, int );
IoctlBlock(int drive); //constructor
void IoctlError( int );
int _drive; //current drive (1-based)
unsigned _info; //current drive info word
public:
static IoctlBlock *Init( int drive );
~IoctlBlock() { }
enum localDrive {
//bit settings for local drives, i.e. bit 12=0....
_32bit = 0x0002, //b1=1, drive uses 32-bit
//sector addressing
genBlockIoctl = 0x0040, //b6=1, can use GIOCTL for
//block devices (440dh) and
//and get/set logical drive
//map (440eh and 440fh)
queryIoctl = 0x0080, //b7=1, can use Query IOCTL
//Device (4411h)
isShared = 0x0200, //b9=1, drive local but shared
//by others on network
rmvMedia = 0x0800, //b11=1, can use Removable
//media check (4408h)
drvRemote = 0x1000, //b12 = 1 if drive is remote
mdFat = 0x2000, //b13=1, needs FAT media descr
xmitIoctl = 0x4000, //b14=1, can send/recv
//Ioctl data to/from block
//device (4404h and 4405h)
substDrive = 0x8000 //b15=1, substitution drive
//set by 'subst' command
};
//Return values for checkFunction() ......
enum query_return_t {
is_supported, //OK!
invalid_function, //no IOCTL support at all
access_denied, //function not supported
invalid_drive,
unknown //unable to comply, or
//_dos_version < 5.0
};
unsigned driveInfo( void ) { return _info; }
int currentDrive(void ) { return _drive; }
int sendIoctl( unsigned *count, void *buffer );
int readIoctl( unsigned *count, void *buffer );
int isRemote(void) { return _info & drvRemote; }
int isRemovable(void);
int checkAlias( void);
int nextAlias( int next );
int getParams( struct DEVICEPARAMS *dpms );
int setParams( struct DEVICEPARAMS *dpms );
int readSectors( struct RWBLOCK *tpms );
int writeSectors( struct RWBLOCK *tpms );
int getAccessFlag(void);
int setAccessFlag(int flag);
int formatTrack( int head, int cyl );
int checkFormat( int head, int cyl )
{ return format_track( 1, head, cyl ); }
int verifyTrack( int head, int cyl );
int getMediaID( struct MID *mid ) {
return block_ioctl( get_media_id,
(void *) mid ); }
int setMediaID( struct MID *mid ) {
return block_ioctl( set_media_id,
(void *) mid ); }
int senseMediaType( struct MTYPE *mtype ) {
return block_ioctl( sense_media_type,
(void *) mtype ); }
int checkFunction( block_cmd cmd );
}; //.... end class IoctlBlock
#endif //__BLOCK_H
/* ----- End of File ------------------------------- */
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