[unix-history] / usr / src / contrib / usr.x25 / nimd / buf.h

#define FLAG(bp)	(bp)->b_data[0]
#define ISEMPTY(bp)	((bp)->b_top == (bp)->b_bot)
#define RESET(bp)	(bp)->b_top = (bp)->b_bot = (bp)->b_data
#define QEMPTY(qp)	((qp)->b_next == (struct buf *)qp)
#define SIZE(bp)	((bp)->b_top - (bp)->b_bot)
#define GETCHAR(bp)	(*(bp)->b_bot++ & 0377)
#define PUTCHAR(c, bp)	*(bp)->b_top++ = c
#define UNGETC(c, bp)	*--(bp)->b_bot = c
#define BUFCOPY(f, t)	bcopy((f)->b_bot, (t)->b_top, SIZE(f)); (t)->b_top+=SIZE(f);
#define STRTOBUF(s, bp)	{ register char *sp=s; register int l=strlen(s); \
			bcopy(s, (bp)->b_top, l); (bp)->b_top += l;}

struct	bufhd {		/* buffer header; b_prev and b_next must be first */
	struct	buf *b_prev, *b_next;
	short	b_count;	/* total number of bytes of data queued */
};

struct	buf {
	struct	buf *b_prev, *b_next;	/* previous and next buffers */
	char	*b_bot;		/* start of useful data */
	char	*b_top;		/* current position in data */
	char	b_data[1];	/* usually more than 1 byte */
} ;

struct	buf *getbuf(), *FillBuf();
Commit	Line	Data
d635240e C	1	#define FLAG(bp) (bp)->b_data[0]
	2	#define ISEMPTY(bp) ((bp)->b_top == (bp)->b_bot)
	3	#define RESET(bp) (bp)->b_top = (bp)->b_bot = (bp)->b_data
	4	#define QEMPTY(qp) ((qp)->b_next == (struct buf *)qp)
	5	#define SIZE(bp) ((bp)->b_top - (bp)->b_bot)
	6	#define GETCHAR(bp) (*(bp)->b_bot++ & 0377)
	7	#define PUTCHAR(c, bp) *(bp)->b_top++ = c
	8	#define UNGETC(c, bp) *--(bp)->b_bot = c
	9	#define BUFCOPY(f, t) bcopy((f)->b_bot, (t)->b_top, SIZE(f)); (t)->b_top+=SIZE(f);
	10	#define STRTOBUF(s, bp) { register char *sp=s; register int l=strlen(s); \
	11	bcopy(s, (bp)->b_top, l); (bp)->b_top += l;}
	12
	13	struct bufhd { /* buffer header; b_prev and b_next must be first */
	14	struct buf b_prev, b_next;
	15	short b_count; /* total number of bytes of data queued */
	16	};
	17
	18	struct buf {
	19	struct buf b_prev, b_next; /* previous and next buffers */
	20	char b_bot; / start of useful data */
	21	char b_top; / current position in data */
	22	char b_data[1]; /* usually more than 1 byte */
	23	} ;
	24
	25	struct buf getbuf(), FillBuf();