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BLKIO_.H
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1989-10-31
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/* Copyright (c) 1989 Citadel */
/* All Rights Reserved */
/* #ident "blkio_.h 1.2 - 89/10/31" */
/*man---------------------------------------------------------------------------
NAME
blkio_.h - private header for blkio library
SYNOPSIS
#include "blkio_.h"
DESCRIPTION
This is a private header file included by the blkio library
modules.
------------------------------------------------------------------------------*/
#ifndef BLKIO_H_ /* prevent multiple includes */
#define BLKIO_H_
/*#define DEBUG /* switch to enable debugging for blkio library */
/* The HOST macro specifies the host operating system. Currently supported */
/* systems are: */
#define UNIX (1) /* UNIX */
#define MSDOS (2) /* MS-DOS */
#define HOST MSDOS
/* The MSDOSC macro specifies the MS-DOS C compiler being used. Currently */
/* supported compilers are: */
#define TURBOC (1) /* Borland Turbo C */
#define MSC (2) /* Microsoft C */
#define MSQC (3) /* Microsoft Quick C */
#define MSDOSC TURBOC
#include <bool.h>
#include "blkio.h"
/* tables */
extern BLKFILE biob[BOPEN_MAX]; /* BLKFILE control struct table declaration */
/* BLKFILE bit flags */
#define BIOOPEN (03) /* open status bits */
#define BIOREAD (01) /* block file is open for reading */
#define BIOWRITE (02) /* block file is open for writing */
#define BIOUSRBUF (04) /* user supplied buffer */
#define BIOERR (0100) /* error has occurred on this block file */
/* block_t bit flags */
#define BLKREAD (01) /* block can be read */
#define BLKWRITE (02) /* block needs to be written to disk */
#define BLKERR (0100) /* error has occurred on this block */
/* function declarations */
#if __STDC__ == 1
int b_alloc(BLKFILE *bp);
#define b_blkbuf(BP, N) ((void *)( \
(char *)(BP)->blkbuf + \
((N) == 0 ? 0 : (BP)->hdrsize + ((N) - 1) * (BP)->blksize)\
))
#define b_block_p(BP, N) ((block_t *)( \
(char *)(BP)->block_p + (N) * sizeof(block_t) \
))
void b_free(BLKFILE *bp);
int b_get(BLKFILE *bp, size_t i);
int b_initlist(BLKFILE *bp);
int b_mkmru(BLKFILE *bp, size_t i);
int b_put(BLKFILE *bp, size_t i);
bool b_valid(const BLKFILE *bp);
int b_uclose(BLKFILE *bp);
int b_uendblk(BLKFILE *bp, bpos_t *endblk_p);
int b_ugetf(BLKFILE *bp, bpos_t bn, size_t offset, void *buf, size_t bufsize);
int b_uopen(BLKFILE *bp, const char *filename, const char *type);
int b_uputf(BLKFILE *bp, bpos_t bn, size_t offset, const void *buf, size_t bufsize);
#else
int b_alloc();
#define b_blkbuf(BP, N) ((void *)( \
(char *)(BP)->blkbuf + \
((N) == 0 ? 0 : (BP)->hdrsize + ((N) - 1) * (BP)->blksize)\
))
#define b_block_p(BP, N) ((block_t *)( \
(char *)(BP)->block_p + (N) * sizeof(block_t) \
))
void b_free();
int b_get();
int b_initlist();
int b_mkmru();
int b_put();
bool b_valid();
int b_uclose();
int b_uendblk();
int b_ugetf();
int b_uopen();
int b_uputf();
#endif /* #if __STDC__ == 1 */
/* block file open types */
#define BF_READ ("r")
#define BF_RDWR ("r+")
#define BF_CRTR ("w+")
#define BF_CREATE ("c")
#ifdef DEBUG
#define BEPRINT { \
fprintf(stderr, "blkio error line %d of %s. errno = %d.\n", \
__LINE__, __FILE__, errno); \
}
#else
#define BEPRINT
#endif
#endif /* #ifndef BLKIO_H_ */