104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
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/*
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* File:fs.h
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*/
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/*
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* $PSLibId: Run-time Library Release 4.7$
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*/
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#ifndef _FS_H
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#define _FS_H
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#if defined(_LANGUAGE_C)||defined(LANGUAGE_C)||defined(_LANGUAGE_C_PLUS_PLUS)||defined(__cplusplus)||defined(c_plusplus)
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/* device table */
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struct device_table {
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char *dt_string; /* device name */
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int dt_type; /* device "type" */
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int dt_bsize; /* file system type */
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char *dt_desc; /* device description */
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int (*dt_init)(); /* device init routine */
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int (*dt_open)(); /* device open routine */
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int (*dt_strategy)(); /* device strategy routine, returns cnt */
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int (*dt_close)(); /* device close routine */
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int (*dt_ioctl)(); /* device ioctl routine */
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int (*dt_read)(); /* fs read routine, returns count */
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int (*dt_write)(); /* fs write routine, return count */
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int (*dt_delete)(); /* file delete routine */
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int (*dt_undelete)(); /* file delete routine */
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int (*dt_firstfile)(); /* directory serach routine */
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int (*dt_nextfile)(); /* directory serach routine */
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int (*dt_format)();
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int (*dt_cd)();
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int (*dt_rename)();
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int (*dt_remove)();
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int (*dt_else)();
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};
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#endif /* LANGUAGE_C */
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/* device types */
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#define DTTYPE_CHAR 0x1 /* character device */
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#define DTTYPE_CONS 0x2 /* can be console */
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#define DTTYPE_BLOCK 0x4 /* block device */
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#define DTTYPE_RAW 0x8 /* raw device that uses fs switch */
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#define DTTYPE_FS 0x10
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/* character device flags */
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#define DB_RAW 0x1 /* don't interpret special chars */
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#define DB_STOPPED 0x2 /* stop output */
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#define DB_BREAK 0x4 /* cntl-c raise console interrpt */
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/* character device buffer */
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#define CBUFSIZE 256
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#if defined(_LANGUAGE_C)||defined(LANGUAGE_C)||defined(_LANGUAGE_C_PLUS_PLUS)||defined(__cplusplus)||defined(c_plusplus)
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struct device_buf {
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int db_flags; /* character device flags */
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char *db_in; /* pts at next free char */
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char *db_out; /* pts at next filled char */
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char db_buf[CBUFSIZE]; /* circular buffer for input */
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};
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#endif /* LANGUAGE_C */
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/* circular buffer functions */
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#define CIRC_EMPTY(x) ((x)->db_in == (x)->db_out)
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#define CIRC_FLUSH(x) ((x)->db_in = (x)->db_out = (x)->db_buf)
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#define CIRC_STOPPED(x) ((x)->db_flags & DB_STOPPED)
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/* io block */
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#if defined(_LANGUAGE_C)||defined(LANGUAGE_C)||defined(_LANGUAGE_C_PLUS_PLUS)||defined(__cplusplus)||defined(c_plusplus)
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struct iob {
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int i_flgs;
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int i_unit; /* pseudo device unit */
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char *i_ma; /* memory address of i/o buffer */
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unsigned int i_cc; /* character count of transfer */
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unsigned long i_offset; /* seek offset in file */
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int i_fstype; /* file system type */
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int i_errno; /* error # return */
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struct device_table *i_dp; /* pointer into device_table */
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unsigned long i_size;
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long i_head;
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long i_fd; /* file descriptor */
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};
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#endif /* LANGUAGE_C */
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#ifndef NULL
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#define NULL 0
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#endif
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/* Request codes */
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#define READ 1
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#define WRITE 2
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#define NIOB 16 /* max number of open files */
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/*
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extern int _nulldev();
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extern int _nodev();
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*/
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#endif /* _FS_H */
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