ref: 7ab86494986671bf38464435f57fb6f925ce8632
dir: /sys/src/cmd/8c/bound.h/
/*
* Bounding Box stuff (brucee 04/03/30).
*/
#include <mp.h>
#include <libsec.h>
typedef struct BB BB;
typedef struct BBset BBset;
typedef uchar Hval[SHA1dlen];
#define BBEQ(a, b) (memcmp((a), (b), SHA1dlen) == 0)
#define BBMKHASH(b, n, h) sha1((uchar *)(b), (n), (h), nil)
#define BBCP(d, s) memmove(d, s, SHA1dlen)
enum
{
Bpre = 1 << 0, /* has a flow in */
Bjo = 1 << 1, /* a jump only */
Bbig = 1 << 2, /* too big */
Bdel = 1 << 3, /* deleted or not of interest */
Bpin = 1 << 4, /* pinned by embedded labels */
BBHASH = 64, /* power of 2 <= 256 */
BBMASK = BBHASH - 1,
BBINIT = 128,
BBBIG = 64,
BBBSIZE = 8192,
BINST = 128,
COSTHI = 0x7F,
COSTJO = 0xFF,
};
struct BB
{
Reg* first;
Reg* last;
BBset* set;
BB* link;
BB* aux;
short flags;
short len;
};
struct BBset
{
Hval hash;
BB* ents;
BBset* next;
BBset* link;
short index;
uchar damage;
uchar recalc;
};