473 lines
10 KiB
C
473 lines
10 KiB
C
/* $Header: sets.c,v 2.3 88/09/19 12:55:30 nhall Exp $ */
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/* $Source: /var/home/tadl/src/argo/xebec/RCS/sets.c,v $ */
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/*
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* This code is such a kludge that I don't want to put my name on it.
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* It was a ridiculously fast hack and needs rewriting.
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* However it does work...
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*/
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#include "main.h"
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#include "malloc.h"
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#include "sets.h"
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#include "debug.h"
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#include <stdio.h>
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struct Object *CurrentEvent = (struct Object *)0;
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struct Object *Objtree;
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struct Object dummy;
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/*
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* define a set w/ type and name
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* return a set number
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*/
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#undef NULL
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#define NULL (struct Object *)0
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static FILE *Sfile, *Efile;
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extern FILE *astringfile;
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char *Noname = "Unnamed set\0";
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initsets(f,s)
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FILE *f, *s;
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{
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static char errorstring[20];
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extern struct Object *SameState;
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Efile = f;
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Sfile = s;
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IFDEBUG(X)
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fprintf(astringfile, "char *%s_sstring[] = {\n", protocol);
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ENDDEBUG
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sprintf(errorstring, "%sERROR\0", ST_PREFIX);
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defineitem(STATESET, errorstring, (char *)0); /* state 0 */
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SameState = (struct Object *) Malloc( sizeof (struct Object) );
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SameState->obj_kind = OBJ_ITEM;
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SameState->obj_type = STATESET;
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SameState->obj_name = "SAME";
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SameState->obj_struc = (char *)0;
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SameState->obj_number = 0;
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SameState->obj_members = (struct Object *)0;
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SameState->obj_left = (struct Object *)0;
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SameState->obj_right = (struct Object *)0;
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SameState->obj_parent = (struct Object *)0;
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}
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/*
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* get a set based on its type and name
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* returns address of an Object, may be set or item
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*/
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struct Object *lookup(type, name)
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unsigned char type;
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char *name;
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{
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register struct Object *p = Objtree;
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int val = 1 ;
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IFDEBUG(o)
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fprintf(stdout,"lookup 0x%x,%s \n",
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type, name);
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ENDDEBUG
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while( p && val ) {
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IFDEBUG(o)
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fprintf(OUT, "lookup strcmp 0x%x,%s, 0x%x,%s\n",
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name, name, OBJ_NAME(p), OBJ_NAME(p));
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ENDDEBUG
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if( p->obj_name == (char *)0 ) {
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fprintf(stderr, "Unnamed set in table!\n");
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Exit(-1);
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}
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val = (int) strcmp(name, OBJ_NAME(p));
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if(val < 0) {
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/* left */
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p = p->obj_left;
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} else if (val > 0) {
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/* right */
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p = p->obj_right;
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}
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}
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if( p && ( p->obj_type != type)) {
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fprintf(stdout, "lookup(0x%x,%s) found wrong obj type 0x%x\n",
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type,name, p->obj_type);
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p = NULL;
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}
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IFDEBUG(o)
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fprintf(stdout,"lookup 0x%x,%s returning 0x%x\n",type, name, p);
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ENDDEBUG
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return(p);
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}
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static int states_done = 0;
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end_states(f)
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FILE *f;
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{
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register unsigned n = Nstates;
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register int i;
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extern char Eventshiftstring[];
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states_done = 1;
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for( i = 0; ;i++) {
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if( (n >>= 1) <= 0 ) break;
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}
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Eventshift = i+1;
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IFDEBUG(d)
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fprintf(OUT, "Eventshift=%d\n", Eventshift);
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ENDDEBUG
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sprintf(Eventshiftstring, "%d\0",Eventshift);
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fprintf(f, "struct %s_event {\n\tint ev_number;\n", &protocol[0]);
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IFDEBUG(X)
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/* finish sstring[] & start estring[] */
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fprintf(astringfile,
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"};\n\nchar *%s_estring[] = {\n", protocol);
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ENDDEBUG
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}
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int FirstEventAttribute = 1;
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static
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insert(o)
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struct Object *o;
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{
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struct Object *p = Objtree;
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struct Object **q = &Objtree;
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int val=1;
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if (o->obj_name == (char *)0) {
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fprintf(stderr, "Internal Error: inserting unnamed object\n");
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Exit(-1);
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}
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if( o->obj_type == STATESET) {
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if( states_done ) {
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fprintf(stderr, "No states may be defined after *TRANSITIONS\n");
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Exit(-1);
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}
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o->obj_number = Nstates++ ;
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if(Nstates > MAXSTATES) {
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fprintf(stderr, "Too many states\n");
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Exit(-1);
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}
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fprintf(Sfile, "#define %s 0x%x\n", o->obj_name, o->obj_number);
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IFDEBUG(X)
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fprintf(astringfile, "\"%s(0x%x)\",\n", o->obj_name, o->obj_number);
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ENDDEBUG
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} else {
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/* EVENTSET */
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if( ! states_done ) {
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fprintf(stderr, "states must precede events\n");
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Exit(-1);
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}
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o->obj_number = Nevents++ ;
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if(Nevents > MAXEVENTS) {
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fprintf(stderr, "Too many events\n");
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Exit(-1);
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}
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if(o->obj_struc) {
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if( FirstEventAttribute ) {
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fprintf(Efile, "\n\tunion{\n"); /*} */
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FirstEventAttribute = 0;
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}
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fprintf(Efile,
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"struct %s %s%s;\n\n", o->obj_struc, EV_PREFIX, o->obj_name);
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}
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fprintf(Efile, "#define %s 0x%x\n", o->obj_name, o->obj_number);
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IFDEBUG(X)
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fprintf(astringfile, "\"%s(0x%x)\",\n", o->obj_name, o->obj_number);
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ENDDEBUG
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}
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IFDEBUG(o)
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fprintf(OUT, "insert(%s)\n", OBJ_NAME(o) );
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if(o->obj_right != NULL) {
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fprintf(OUT, "insert: unclean Object right\n");
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exit(-1);
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}
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if(o->obj_left != NULL) {
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fprintf(OUT, "insert: unclean Object left\n");
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exit(-1);
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}
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fflush(OUT);
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ENDDEBUG
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while( val ) {
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if(p == NULL) {
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*q = o;
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o->obj_parent = (struct Object *)q;
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break;
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}
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if(!(val = strcmp(o->obj_name, p->obj_name)) ) {
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/* equal */
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fprintf(stderr, "re-inserting %s\n",o->obj_name);
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exit(-1);
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}
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if(val < 0) {
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/* left */
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q = &p->obj_left;
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p = p->obj_left;
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} else {
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/* right */
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q = &p->obj_right;
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p = p->obj_right;
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}
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}
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IFDEBUG(a)
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dumptree(Objtree,0);
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ENDDEBUG
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}
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delete(o)
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struct Object *o;
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{
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register struct Object *p = o->obj_right;
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register struct Object *q;
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register struct Object *newparent;
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register struct Object **np_childlink;
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IFDEBUG(T)
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fprintf(stdout, "delete(0x%x)\n", o);
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dumptree(Objtree,0);
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ENDDEBUG
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/* q <== lowest valued node of the right subtree */
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while( p ) {
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q = p;
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p = p->obj_left;
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}
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if (o->obj_parent == (struct Object *)&Objtree) {
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newparent = (struct Object *)&Objtree;
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np_childlink = (struct Object **)&Objtree;
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} else if(o->obj_parent->obj_left == o) {
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newparent = o->obj_parent;
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np_childlink = &(o->obj_parent->obj_left);
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} else {
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newparent = o->obj_parent;
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np_childlink = &(o->obj_parent->obj_right);
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}
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IFDEBUG(T)
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fprintf(OUT, "newparent=0x%x\n");
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ENDDEBUG
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if (q) { /* q gets the left, parent gets the right */
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IFDEBUG(T)
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fprintf(OUT, "delete: q null\n");
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ENDDEBUG
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q->obj_left = p;
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if(p) p->obj_parent = q;
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p = o->obj_right;
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} else { /* parent(instead of q) gets the left ; there is no right */
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IFDEBUG(T)
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fprintf(OUT, "delete: q not null\n");
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ENDDEBUG
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p = o->obj_left;
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}
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*np_childlink = p;
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if(p)
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p->obj_parent = newparent;
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IFDEBUG(T)
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fprintf(OUT, "After deleting 0x%x\n",o);
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dumptree(Objtree,0);
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ENDDEBUG
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}
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struct Object *
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defineset(type, adr, keep)
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unsigned char type;
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char *adr;
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int keep;
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{
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struct Object *onew;
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IFDEBUG(o)
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printf("defineset(0x%x,%s, %s)\n", type , adr, keep?"KEEP":"NO_KEEP");
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ENDDEBUG
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onew = (struct Object *)Malloc(sizeof (struct Object));
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bzero(onew, sizeof(struct Object));
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onew->obj_name = adr;
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onew->obj_kind = OBJ_SET;
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onew->obj_type = type;
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if(keep)
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insert( onew );
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/* address already stashed before calling defineset */
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IFDEBUG(o)
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printf("defineset(0x%x,%s) returning 0x%x\n", type , adr, onew);
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dumptree(Objtree,0);
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ENDDEBUG
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return(onew);
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}
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dumpit(o, s)
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char *o;
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char *s;
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{
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register int i;
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IFDEBUG(o)
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fprintf(OUT, "object 0x%x, %s\n",o, s);
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for(i=0; i< sizeof(struct Object); i+=4) {
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fprintf(OUT, "0x%x: 0x%x 0x%x 0x%x 0x%x\n",
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*((int *)o), *o, *(o+1), *(o+2), *(o+3) );
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}
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ENDDEBUG
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}
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defineitem(type, adr, struc)
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unsigned char type;
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char *adr;
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char *struc;
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{
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struct Object *onew;
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IFDEBUG(o)
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printf("defineitem(0x%x, %s at 0x%x, %s)\n", type, adr, adr, struc);
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ENDDEBUG
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if( onew = lookup( type, adr ) ) {
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fprintf(stderr,
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"Internal error at defineitem: trying to redefine obj type 0x%x, adr %s\n",
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type, adr);
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exit(-1);
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} else {
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onew = (struct Object *)Malloc(sizeof (struct Object));
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bzero(onew, sizeof(struct Object));
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onew->obj_name = stash(adr);
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onew->obj_kind = OBJ_ITEM;
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onew->obj_type = type;
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onew->obj_struc = struc?stash(struc):struc;
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insert( onew );
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}
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IFDEBUG(o)
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fprintf(OUT, "defineitem(0x%x, %s) returning 0x%x\n", type, adr, onew);
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ENDDEBUG
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}
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member(o, adr)
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struct Object *o;
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char *adr;
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{
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struct Object *onew, *oold;
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IFDEBUG(o)
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printf("member(0x%x, %s)\n", o, adr);
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ENDDEBUG
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oold = lookup( o->obj_type, adr );
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onew = (struct Object *)Malloc(sizeof (struct Object));
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if( oold == NULL ) {
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extern int lineno;
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fprintf(stderr,
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"Warning at line %d: set definition of %s causes definition of\n",
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lineno, OBJ_NAME(o));
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fprintf(stderr, "\t (previously undefined) member %s\n", adr);
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bzero(onew, sizeof(struct Object));
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onew->obj_name = stash(adr);
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onew->obj_kind = OBJ_ITEM;
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onew->obj_type = o->obj_type;
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onew->obj_members = NULL;
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insert( onew );
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} else {
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if(oold->obj_kind != OBJ_ITEM) {
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fprintf(stderr, "Sets cannot be members of sets; %s\n", adr);
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exit(-1);
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}
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bcopy(oold, onew, sizeof(struct Object));
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onew->obj_members = onew->obj_left = onew->obj_right = NULL;
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}
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onew->obj_members = o->obj_members;
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o->obj_members = onew;
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}
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struct Object *Lookup(type, name)
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unsigned char type;
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char *name;
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{
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register struct Object *o = lookup(type,name);
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if(o == NULL) {
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fprintf(stderr, "Trying to use undefined %s: %s\n",
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type==STATESET?"state":"event", name);
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Exit(-1);
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}
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return(o);
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}
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AddCurrentEventName(x)
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register char **x;
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{
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register char *n = EV_PREFIX; ;
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if( CurrentEvent == (struct Object *)0 ) {
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fprintf(stderr, "No event named! BARF!\n"); Exit(-1);
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}
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if( ! CurrentEvent->obj_struc ) {
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fprintf(stderr, "No attributes for current event!\n"); Exit(-1);
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}
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/* add prefix first */
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while(*n) {
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*(*x)++ = *n++;
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}
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n = CurrentEvent->obj_name;
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while(*n) {
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*(*x)++ = *n++;
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}
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}
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dumptree(o,i)
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register struct Object *o;
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int i;
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{
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register int j;
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if(o == NULL) {
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for(j=0; j<i; j++)
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fputc(' ', stdout);
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fprintf(stdout, "%3d NULL\n", i);
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} else {
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dumptree(o->obj_left, i+1);
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for(j=0; j<i; j++)
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fputc(' ', stdout);
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fprintf(stdout, "%3d 0x%x: %s\n", i,o, OBJ_NAME(o));
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dumptree(o->obj_right, i+1);
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}
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}
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dump(c,a)
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{
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register int x = 8;
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int zero = 0;
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#include <sys/signal.h>
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fprintf(stderr, "dump: c 0x%x, a 0x%x\n",c,a);
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x = x/zero;
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kill(0, SIGQUIT);
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}
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dump_trans( pred, oldstate, newstate, action, event )
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struct Object *oldstate, *newstate, *event;
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char *pred, *action;
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{
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extern int transno;
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struct Object *o;
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fprintf(stdout, "\n%d: ", transno);
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#define dumpit(x)\
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if((x)->obj_kind == OBJ_SET) {\
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o = (x)->obj_members; fprintf( stdout, "[ " );\
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while(o) { fprintf(stdout, "%s ", o->obj_name); o = o->obj_members; }\
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fprintf( stdout, " ] ");\
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} else { fprintf(stdout, "%s ", (x)->obj_name); }
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dumpit(newstate);
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fprintf(stdout, " <== ");
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dumpit(oldstate);
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dumpit(event);
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fprintf(stdout, "\n\t\t%s\n\t\t%s\n", pred?pred:"DEFAULT",
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action);
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}
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