NetBSD/sys/netiso/xebec/sets.c

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2001-11-13 03:56:55 +03:00
/* $NetBSD: sets.c,v 1.7 2001/11/13 01:10:52 lukem Exp $ */
/*
* This code is such a kludge that I don't want to put my name on it.
* It was a ridiculously fast hack and needs rewriting.
* However it does work...
*/
2001-11-13 03:56:55 +03:00
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sets.c,v 1.7 2001/11/13 01:10:52 lukem Exp $");
#include "main.h"
#include "malloc.h"
#include "sets.h"
#include "debug.h"
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#include <signal.h>
struct Object *CurrentEvent = (struct Object *)0;
struct Object *Objtree;
struct Object dummy;
/*
* define a set w/ type and name
* return a set number
*/
#undef NULL
#define NULL (struct Object *)0
static FILE *Sfile, *Efile;
extern FILE *astringfile;
char *Noname = "Unnamed set\0";
void dumptree();
void defineitem();
void
initsets(f,s)
FILE *f, *s;
{
static char errorstring[20];
extern struct Object *SameState;
Efile = f;
Sfile = s;
IFDEBUG(X)
fprintf(astringfile, "char *%s_sstring[] = {\n", protocol);
ENDDEBUG
sprintf(errorstring, "%sERROR", ST_PREFIX);
defineitem(STATESET, errorstring, (char *)0); /* state 0 */
SameState = (struct Object *) Malloc( sizeof (struct Object) );
SameState->obj_kind = OBJ_ITEM;
SameState->obj_type = STATESET;
SameState->obj_name = "SAME";
SameState->obj_struc = (char *)0;
SameState->obj_number = 0;
SameState->obj_members = (struct Object *)0;
SameState->obj_left = (struct Object *)0;
SameState->obj_right = (struct Object *)0;
SameState->obj_parent = (struct Object *)0;
}
/*
* get a set based on its type and name
* returns address of an Object, may be set or item
*/
struct Object *lookup(type, name)
unsigned char type;
char *name;
{
register struct Object *p = Objtree;
int val = 1 ;
IFDEBUG(o)
fprintf(stdout,"lookup 0x%x,%s \n",
type, name);
ENDDEBUG
while( p && val ) {
IFDEBUG(o)
fprintf(OUT, "lookup strcmp 0x%p,%s, 0x%p,%s\n",
name, name, OBJ_NAME(p), OBJ_NAME(p));
ENDDEBUG
if( p->obj_name == (char *)0 ) {
fprintf(stderr, "Unnamed set in table!\n");
Exit(-1);
}
val = (int) strcmp(name, OBJ_NAME(p));
if(val < 0) {
/* left */
p = p->obj_left;
} else if (val > 0) {
/* right */
p = p->obj_right;
}
}
if( p && ( p->obj_type != type)) {
fprintf(stdout, "lookup(0x%x,%s) found wrong obj type 0x%x\n",
type,name, p->obj_type);
p = NULL;
}
IFDEBUG(o)
fprintf(stdout,"lookup 0x%x,%s returning 0x%p\n",type, name, p);
ENDDEBUG
return(p);
}
static int states_done = 0;
void
end_states(f)
FILE *f;
{
register unsigned n = Nstates;
register int i;
extern char Eventshiftstring[];
states_done = 1;
for( i = 0; ;i++) {
if( (n >>= 1) <= 0 ) break;
}
Eventshift = i+1;
IFDEBUG(d)
fprintf(OUT, "Eventshift=%d\n", Eventshift);
ENDDEBUG
sprintf(Eventshiftstring, "%d",Eventshift);
fprintf(f, "struct %s_event {\n\tint ev_number;\n", &protocol[0]);
IFDEBUG(X)
/* finish sstring[] & start estring[] */
fprintf(astringfile,
"};\n\nchar *%s_estring[] = {\n", protocol);
ENDDEBUG
}
int FirstEventAttribute = 1;
static void
insert(o)
struct Object *o;
{
struct Object *p = Objtree;
struct Object **q = &Objtree;
int val=1;
if (o->obj_name == (char *)0) {
fprintf(stderr, "Internal Error: inserting unnamed object\n");
Exit(-1);
}
if( o->obj_type == STATESET) {
if( states_done ) {
fprintf(stderr, "No states may be defined after *TRANSITIONS\n");
Exit(-1);
}
o->obj_number = Nstates++ ;
if(Nstates > MAXSTATES) {
fprintf(stderr, "Too many states\n");
Exit(-1);
}
fprintf(Sfile, "#define %s 0x%x\n", o->obj_name, o->obj_number);
IFDEBUG(X)
fprintf(astringfile, "\"%s(0x%x)\",\n", o->obj_name, o->obj_number);
ENDDEBUG
} else {
/* EVENTSET */
if( ! states_done ) {
fprintf(stderr, "states must precede events\n");
Exit(-1);
}
o->obj_number = Nevents++ ;
if(Nevents > MAXEVENTS) {
fprintf(stderr, "Too many events\n");
Exit(-1);
}
if(o->obj_struc) {
if( FirstEventAttribute ) {
fprintf(Efile, "\n\tunion{\n"); /*} */
FirstEventAttribute = 0;
}
fprintf(Efile,
"struct %s %s%s;\n\n", o->obj_struc, EV_PREFIX, o->obj_name);
}
fprintf(Efile, "#define %s 0x%x\n", o->obj_name, o->obj_number);
IFDEBUG(X)
fprintf(astringfile, "\"%s(0x%x)\",\n", o->obj_name, o->obj_number);
ENDDEBUG
}
IFDEBUG(o)
fprintf(OUT, "insert(%s)\n", OBJ_NAME(o) );
if(o->obj_right != NULL) {
fprintf(OUT, "insert: unclean Object right\n");
exit(1);
}
if(o->obj_left != NULL) {
fprintf(OUT, "insert: unclean Object left\n");
exit(1);
}
fflush(OUT);
ENDDEBUG
while( val ) {
if(p == NULL) {
*q = o;
o->obj_parent = (struct Object *)q;
break;
}
if(!(val = strcmp(o->obj_name, p->obj_name)) ) {
/* equal */
fprintf(stderr, "re-inserting %s\n",o->obj_name);
exit(1);
}
if(val < 0) {
/* left */
q = &p->obj_left;
p = p->obj_left;
} else {
/* right */
q = &p->obj_right;
p = p->obj_right;
}
}
IFDEBUG(a)
dumptree(Objtree,0);
ENDDEBUG
}
void
delete(o)
struct Object *o;
{
register struct Object *p = o->obj_right;
register struct Object *q;
register struct Object *newparent;
register struct Object **np_childlink;
IFDEBUG(T)
fprintf(stdout, "delete(0x%p)\n", o);
dumptree(Objtree,0);
ENDDEBUG
/* q <== lowest valued node of the right subtree */
while( p ) {
q = p;
p = p->obj_left;
}
if (o->obj_parent == (struct Object *)&Objtree) {
newparent = (struct Object *)&Objtree;
np_childlink = (struct Object **)&Objtree;
} else if(o->obj_parent->obj_left == o) {
newparent = o->obj_parent;
np_childlink = &(o->obj_parent->obj_left);
} else {
newparent = o->obj_parent;
np_childlink = &(o->obj_parent->obj_right);
}
IFDEBUG(T)
fprintf(OUT, "newparent=0x%p\n", newparent);
ENDDEBUG
if (q) { /* q gets the left, parent gets the right */
IFDEBUG(T)
fprintf(OUT, "delete: q null\n");
ENDDEBUG
q->obj_left = p;
if(p) p->obj_parent = q;
p = o->obj_right;
} else { /* parent(instead of q) gets the left ; there is no right */
IFDEBUG(T)
fprintf(OUT, "delete: q not null\n");
ENDDEBUG
p = o->obj_left;
}
*np_childlink = p;
if(p)
p->obj_parent = newparent;
IFDEBUG(T)
fprintf(OUT, "After deleting 0x%p\n",o);
dumptree(Objtree,0);
ENDDEBUG
}
struct Object *
defineset(type, adr, keep)
unsigned char type;
char *adr;
int keep;
{
struct Object *onew;
IFDEBUG(o)
printf("defineset(0x%x,%s, %s)\n", type , adr, keep?"KEEP":"NO_KEEP");
ENDDEBUG
onew = (struct Object *)Malloc(sizeof (struct Object));
bzero(onew, sizeof(struct Object));
onew->obj_name = adr;
onew->obj_kind = OBJ_SET;
onew->obj_type = type;
if(keep)
insert( onew );
/* address already stashed before calling defineset */
IFDEBUG(o)
printf("defineset(0x%x,%s) returning 0x%p\n", type , adr, onew);
dumptree(Objtree,0);
ENDDEBUG
return(onew);
}
void
dumpit(o, s)
char *o;
char *s;
{
register int i;
IFDEBUG(o)
fprintf(OUT, "object 0x%p, %s\n",o, s);
for(i=0; i< sizeof(struct Object); i+=4) {
fprintf(OUT, "0x%x: 0x%x 0x%x 0x%x 0x%x\n",
*((int *)o), *o, *(o+1), *(o+2), *(o+3) );
}
ENDDEBUG
}
void
defineitem(type, adr, struc)
unsigned char type;
char *adr;
char *struc;
{
struct Object *onew;
IFDEBUG(o)
printf("defineitem(0x%x, %s at 0x%p, %s)\n", type, adr, adr, struc);
ENDDEBUG
if((onew = lookup( type, adr ))) {
fprintf(stderr,
"Internal error at defineitem: trying to redefine obj type 0x%x, adr %s\n",
type, adr);
exit(1);
} else {
onew = (struct Object *)Malloc(sizeof (struct Object));
bzero(onew, sizeof(struct Object));
onew->obj_name = stash(adr);
onew->obj_kind = OBJ_ITEM;
onew->obj_type = type;
onew->obj_struc = struc?stash(struc):struc;
insert( onew );
}
IFDEBUG(o)
fprintf(OUT, "defineitem(0x%x, %s) returning 0x%p\n", type, adr, onew);
ENDDEBUG
}
void
member(o, adr)
struct Object *o;
char *adr;
{
struct Object *onew, *oold;
IFDEBUG(o)
printf("member(0x%p, %s)\n", o, adr);
ENDDEBUG
oold = lookup( o->obj_type, adr );
onew = (struct Object *)Malloc(sizeof (struct Object));
if( oold == NULL ) {
extern int lineno;
fprintf(stderr,
"Warning at line %d: set definition of %s causes definition of\n",
lineno, OBJ_NAME(o));
fprintf(stderr, "\t (previously undefined) member %s\n", adr);
bzero(onew, sizeof(struct Object));
onew->obj_name = stash(adr);
onew->obj_kind = OBJ_ITEM;
onew->obj_type = o->obj_type;
onew->obj_members = NULL;
insert( onew );
} else {
if(oold->obj_kind != OBJ_ITEM) {
fprintf(stderr, "Sets cannot be members of sets; %s\n", adr);
exit(1);
}
bcopy(oold, onew, sizeof(struct Object));
onew->obj_members = onew->obj_left = onew->obj_right = NULL;
}
onew->obj_members = o->obj_members;
o->obj_members = onew;
}
struct Object *Lookup(type, name)
unsigned char type;
char *name;
{
register struct Object *o = lookup(type,name);
if(o == NULL) {
fprintf(stderr, "Trying to use undefined %s: %s\n",
type==STATESET?"state":"event", name);
Exit(-1);
}
return(o);
}
void
AddCurrentEventName(x)
register char **x;
{
register char *n = EV_PREFIX; ;
if( CurrentEvent == (struct Object *)0 ) {
fprintf(stderr, "No event named! BARF!\n"); Exit(-1);
}
if( ! CurrentEvent->obj_struc ) {
fprintf(stderr, "No attributes for current event!\n"); Exit(-1);
}
/* add prefix first */
while(*n) {
*(*x)++ = *n++;
}
n = CurrentEvent->obj_name;
while(*n) {
*(*x)++ = *n++;
}
}
void
dumptree(o,i)
register struct Object *o;
int i;
{
register int j;
if(o == NULL) {
for(j=0; j<i; j++)
fputc(' ', stdout);
fprintf(stdout, "%3d NULL\n", i);
} else {
dumptree(o->obj_left, i+1);
for(j=0; j<i; j++)
fputc(' ', stdout);
fprintf(stdout, "%3d 0x%p: %s\n", i,o, OBJ_NAME(o));
dumptree(o->obj_right, i+1);
}
}
void
dump(c,a)
{
register int x = 8;
int zero = 0;
fprintf(stderr, "dump: c 0x%x, a 0x%x\n",c,a);
x = x/zero;
kill(0, SIGQUIT);
}
void
dump_trans( pred, oldstate, newstate, action, event )
struct Object *oldstate, *newstate, *event;
char *pred, *action;
{
extern int transno;
struct Object *o;
fprintf(stdout, "\n%d: ", transno);
#define dumpit(x)\
if((x)->obj_kind == OBJ_SET) {\
o = (x)->obj_members; fprintf( stdout, "[ " );\
while(o) { fprintf(stdout, "%s ", o->obj_name); o = o->obj_members; }\
fprintf( stdout, " ] ");\
} else { fprintf(stdout, "%s ", (x)->obj_name); }
dumpit(newstate);
fprintf(stdout, " <== ");
dumpit(oldstate);
dumpit(event);
fprintf(stdout, "\n\t\t%s\n\t\t%s\n", pred?pred:"DEFAULT",
action);
}