minix/servers/iso9660fs/buf.h

24 lines
746 B
C
Raw Normal View History

#include <sys/dir.h> /* need struct direct */
#include <dirent.h>
PUBLIC struct buf {
union {
char b__data[_MAX_BLOCK_SIZE]; /* ordinary user data */
struct direct b__dir[NR_DIR_ENTRIES(_MAX_BLOCK_SIZE)];/* directory block */
} b;
block_t b_blocknr; /* block number of its (minor) device */
char b_count; /* number of users of this buffer */
} buf[NR_BUFS];
/* A block is free if b_dev == NO_DEV. */
#define NIL_BUF ((struct buf *) 0) /* indicates absence of a buffer */
/* These defs make it possible to use to bp->b_data instead of bp->b.b__data */
#define b_data b.b__data
#define b_dir b.b__dir
#define INODE_BLOCK 0 /* inode block */
#define DIRECTORY_BLOCK 1 /* directory block */