newlib/winsup/cygwin/mtinfo.h
Corinna Vinschen ff0843433a * fhandler.h (class fhandler_dev_raw): Move status bits into protected
bitfield struct type status_flags.  Drop unused has_written bit.
	Add accessor methods.
	(fhandler_dev_raw::clear): Remove.
	(fhandler_dev_raw::reset_devbuf): Remove.
	* fhandler_floppy.cc (fhandler_dev_floppy::lseek): Use accessor method
	for is_writing.
	* fhandler_raw.cc: Use status accessor methods throughout.
	(fhandler_dev_raw::clear): Remove.
	(fhandler_dev_raw::fhandler_dev_raw): Drop clear call.
	(fhandler_dev_raw::~fhandler_dev_raw): Ditto.
	* fhandler_tape.cc: Use mtinfo::status accessor methods throughout.
	(mtinfo_drive::close): Fix conditional to enable BSD semantics
	correctly.
	(mtinfo_drive::get_status): Rename from mtinfo_drive::status.
	* mtinfo.h (class mtinfo_drive): Move status bits into private bitfield
	struct type status_flags.  Add accessor methods.
	Rename status method to get_status.
2004-04-09 20:39:19 +00:00

148 lines
3.7 KiB
C++

/* mtinfo.h: Defininitions for the Cygwin tape driver class.
Copyright 2004 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#define MTINFO_MAGIC 0x179b2af0
#define MTINFO_VERSION 1
/* Maximum number of supported partitions per drive. */
#define MAX_PARTITION_NUM 64
/* Maximum number of supported drives. */
#define MAX_DRIVE_NUM 8
/* Values for bookkeeping of the tape position relative to filemarks
and eod/eom. */
enum eom_val
{
no_eof,
eof_hit,
eof,
eod_hit,
eod,
eom_hit,
eom
};
enum dirty_state
{
clean,
has_read,
has_written
};
enum lock_state
{
unlocked,
lock_error,
auto_locked,
locked
};
/* Partition specific information */
class mtinfo_part
{
public:
long block; /* logical block no */
long file; /* current file no */
long fblock; /* relative block no */
bool smark; /* At setmark? */
eom_val emark; /* "end-of"-mark */
void initialize (long nblock = -1);
};
class mtinfo_drive
{
int drive;
int lasterr;
long partition;
long block;
dirty_state dirty;
lock_state lock;
TAPE_GET_DRIVE_PARAMETERS _dp;
TAPE_GET_MEDIA_PARAMETERS _mp;
struct status_flags
{
unsigned buffer_writes : 1;
unsigned two_fm : 1;
unsigned fast_eom : 1;
unsigned auto_lock : 1;
unsigned sysv : 1;
unsigned nowait : 1;
} status;
mtinfo_part _part[MAX_PARTITION_NUM];
inline int error (const char *str)
{
if (lasterr)
debug_printf ("%s: Win32 error %d", lasterr);
return lasterr;
}
inline bool get_feature (DWORD parm)
{
return ((parm & TAPE_DRIVE_HIGH_FEATURES)
? ((_dp.FeaturesHigh & parm) != 0)
: ((_dp.FeaturesLow & parm) != 0));
}
int get_pos (HANDLE mt, long *ppartition = NULL, long *pblock = NULL);
int _set_pos (HANDLE mt, int mode, long count, int partition);
int create_partitions (HANDLE mt, long count);
int set_partition (HANDLE mt, long count);
int write_marks (HANDLE mt, int marktype, DWORD count);
int erase (HANDLE mt, int mode);
int prepare (HANDLE mt, int action, bool is_auto = false);
int set_compression (HANDLE mt, long count);
int set_blocksize (HANDLE mt, long count);
int get_status (HANDLE mt, struct mtget *get);
int set_options (HANDLE mt, long options);
public:
void initialize (int num, bool first_time);
int get_dp (HANDLE mt);
int get_mp (HANDLE mt);
int open (HANDLE mt);
int close (HANDLE mt, bool rewind);
int read (HANDLE mt, void *ptr, size_t &ulen);
int write (HANDLE mt, const void *ptr, size_t &len);
int ioctl (HANDLE mt, unsigned int cmd, void *buf);
int set_pos (HANDLE mt, int mode, long count, bool sfm_func);
void buffer_writes (bool b) { status.buffer_writes = b; }
bool buffer_writes () { return status.buffer_writes; }
void two_fm (bool b) { status.two_fm = b; }
bool two_fm () { return status.two_fm; }
void fast_eom (bool b) { status.fast_eom = b; }
bool fast_eom () { return status.fast_eom; }
void auto_lock (bool b) { status.auto_lock = b; }
bool auto_lock () { return status.auto_lock; }
void sysv (bool b) { status.sysv = b; }
bool sysv () { return status.sysv; }
void nowait (bool b) { status.nowait = b; }
bool nowait () { return status.nowait; }
PTAPE_GET_DRIVE_PARAMETERS dp (void) { return &_dp; }
PTAPE_GET_MEDIA_PARAMETERS mp (void) { return &_mp; }
mtinfo_part *part (int num) { return &_part[num]; }
};
class mtinfo
{
DWORD magic;
DWORD version;
mtinfo_drive _drive[MAX_DRIVE_NUM];
public:
void initialize (void);
mtinfo_drive *drive (int num) { return &_drive[num]; }
};
extern HANDLE mt_h;
extern mtinfo *mt;
extern void __stdcall mtinfo_init ();