438 lines
10 KiB
C
438 lines
10 KiB
C
/* $Header: /home/ncvs/src/sys/netiso/xebec/procs.c,v 1.1.1.1 1994/05/24 10:07:46 rgrimes Exp $ */
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/* $Source: /home/ncvs/src/sys/netiso/xebec/procs.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 <stdio.h>
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#include <strings.h>
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#include "malloc.h"
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#include "main.h"
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#include "debug.h"
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#include "sets.h"
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#include "procs.h"
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struct Predicate {
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int p_index;
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int p_transno;
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char *p_str;
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struct Predicate *p_next;
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};
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struct Stateent {
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int s_index;
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int s_newstate;
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int s_action;
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struct Stateent *s_next;
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};
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struct Object *SameState = (struct Object *)-1;
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int Index = 0;
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int Nstates = 0;
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int Nevents = 0;
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struct Predicate **Predlist;
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struct Stateent **Statelist;
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extern FILE *astringfile;
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end_events() {
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int size, part;
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char *addr;
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IFDEBUG(X)
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/* finish estring[], start astring[] */
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if(debug['X'] < 2 )
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fprintf(astringfile, "};\n\nchar *%s_astring[] = {\n\"NULLACTION\",\n",
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protocol);
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ENDDEBUG
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/* NOSTRICT */
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Statelist =
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(struct Stateent **) Malloc((Nstates+1) * sizeof(struct Statent *));
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/* NOSTRICT */
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Predlist =
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(struct Predicate **)
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Malloc ( (((Nevents)<<Eventshift)+Nstates)*sizeof(struct Predicate *) );
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size = (((Nevents)<<Eventshift)+Nstates)*sizeof(struct Predicate *) ;
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addr = (char *)Predlist;
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IFDEBUG(N)
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fprintf(OUT, "Predlist at 0x%x, sbrk 0x%x bzero size %d at addr 0x%x\n",
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Predlist, sbrk(0), size, addr);
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ENDDEBUG
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#define BZSIZE 8192
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while(size) {
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part = size>BZSIZE?BZSIZE:size;
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IFDEBUG(N)
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fprintf(OUT, "bzero addr 0x%x part %d size %d\n",addr, part, size);
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ENDDEBUG
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bzero(addr, part);
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IFDEBUG(N)
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fprintf(OUT, "after bzero addr 0x%x part %d size %d\n",addr, part, size);
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ENDDEBUG
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addr += part;
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size -= part;
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}
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IFDEBUG(N)
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fprintf(OUT, "endevents..done \n");
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ENDDEBUG
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}
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int acttable(f,actstring)
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char *actstring;
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FILE *f;
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{
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static Actindex = 0;
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extern FILE *astringfile;
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extern int pgoption;
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IFDEBUG(a)
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fprintf(OUT,"acttable()\n");
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ENDDEBUG
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fprintf(f, "case 0x%x: \n", ++Actindex);
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if(pgoption) {
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fprintf(f, "asm(\" # dummy statement\");\n");
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fprintf(f, "asm(\"_Xebec_action_%x: \");\n", Actindex );
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fprintf(f, "asm(\".data\");\n");
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fprintf(f, "asm(\".globl _Xebec_action_%x# X profiling\");\n",
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Actindex );
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fprintf(f, "asm(\".long 0 # X profiling\");\n");
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fprintf(f, "asm(\".text # X profiling\");\n");
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fprintf(f, "asm(\"cas r0,r15,r0 # X profiling\");\n");
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fprintf(f, "asm(\"bali r15,mcount # X profiling\");\n");
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}
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fprintf(f, "\t\t%s\n\t\t break;\n", actstring);
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IFDEBUG(X)
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if(debug['X']<2) {
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register int len = 0;
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fputc('"',astringfile);
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while(*actstring) {
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if( *actstring == '\n' ) {
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fputc('\\', astringfile);
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len++;
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fputc('n', astringfile);
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} else if (*actstring == '\\') {
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fputc('\\', astringfile);
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len ++;
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fputc('\\', astringfile);
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} else if (*actstring == '\"') {
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fputc('\\', astringfile);
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len ++;
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fputc('\"', astringfile);
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} else fputc(*actstring, astringfile);
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actstring++;
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len++;
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}
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fprintf(astringfile,"\",\n");
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if (len > LINELEN) {
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fprintf(stderr, "Action too long: %d\n",len); Exit(-1);
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}
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}
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ENDDEBUG
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return(Actindex);
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}
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static int Npred=0, Ndefpred=0, Ntrans=0, Ndefevent=0, Nnulla=0;
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statetable(string, oldstate, newstate, action, event)
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char *string;
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int action;
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struct Object *oldstate, *newstate, *event;
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{
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register int different;
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IFDEBUG(a)
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fprintf(OUT,"statetable(0x%x, 0x%x,0x%x, 0x%x)\n",
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string, oldstate, newstate, action);
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fprintf(OUT,"statetable(%s, %s,%s, 0x%x)\n",
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string, oldstate->obj_name, newstate->obj_name, action);
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ENDDEBUG
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if( !action) Nnulla++;
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if( newstate->obj_kind == OBJ_SET) {
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fprintf(stderr, "Newstate cannot be a set\n");
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Exit(-1);
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}
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different = (newstate != SameState);
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(void) predtable( oldstate, event, string,
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action, (newstate->obj_number) * different );
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IFDEBUG(a)
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fprintf(OUT,"EXIT statetable\n");
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ENDDEBUG
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}
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stateentry(index, oldstate, newstate, action)
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int index, action;
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int oldstate, newstate;
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{
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extern FILE *statevalfile;
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IFDEBUG(a)
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fprintf(OUT,"stateentry(0x%x,0x%x,0x%x,0x%x) Statelist@0x%x, val 0x%x\n",
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index, oldstate, newstate,action, &Statelist, Statelist);
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ENDDEBUG
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fprintf(statevalfile, "{0x%x,0x%x},\n", newstate, action);
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}
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int predtable(os, oe, str, action, newstate)
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struct Object *os, *oe;
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char *str;
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int action, newstate;
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{
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register struct Predicate *p, **q;
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register int event, state;
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register struct Object *e, *s;
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struct Object *firste;
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if (oe == (struct Object *)0 ) {
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Ndefevent ++;
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fprintf(stderr, "DEFAULT EVENTS aren't implemented; trans ignored\n");
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return;
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}
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Ntrans++;
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IFDEBUG(g)
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fprintf(stdout,
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"PREDTAB: s %5s; e %5s\n", os->obj_kind==OBJ_SET?"SET":"item",
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oe->obj_kind==OBJ_SET?"SET":"item");
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ENDDEBUG
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if (os->obj_kind == OBJ_SET) s = os->obj_members;
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else s = os;
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if (oe->obj_kind == OBJ_SET) firste = oe->obj_members;
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else firste = oe;
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if(newstate) {
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fprintf(statevalfile, "{0x%x,0x%x},\n",newstate, action);
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Index++;
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}
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while (s) {
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if( !newstate ) { /* !newstate --> SAME */
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/* i.e., use old obj_number */
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fprintf(statevalfile, "{0x%x,0x%x},\n",s->obj_number, action);
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Index++;
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}
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e = firste;
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while (e) {
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event = e->obj_number; state = s->obj_number;
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IFDEBUG(g)
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fprintf(stdout,"pred table event=0x%x, state 0x%x\n",
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event, state);
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fflush(stdout);
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ENDDEBUG
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if( !str /* DEFAULT PREDICATE */) {
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Ndefpred++;
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IFDEBUG(g)
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fprintf(stdout,
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"DEFAULT pred state 0x%x, event 0x%x, Index 0x%x\n",
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state, event, Index);
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fflush(stdout);
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ENDDEBUG
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} else
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Npred++;
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/* put at END of list */
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#ifndef LINT
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IFDEBUG(g)
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fprintf(stdout,
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"predicate for event 0x%x, state 0x%x is 0x%x, %s\n",
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event, state, Index, str);
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fflush(stdout);
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ENDDEBUG
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#endif LINT
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for( ((q = &Predlist[(event<<Eventshift)+state]),
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(p = Predlist[(event<<Eventshift)+state]));
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p ; p = p->p_next ) {
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q = &p->p_next;
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}
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p = (struct Predicate *)Malloc(sizeof(struct Predicate));
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p->p_next = (struct Predicate *)0;
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p->p_str = str;
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p->p_index = Index;
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p->p_transno = transno;
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*q = p;
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IFDEBUG(g)
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fprintf(stdout,
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"predtable index 0x%x, transno %d, E 0x%x, S 0x%x\n",
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Index, transno, e, s);
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ENDDEBUG
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e = e->obj_members;
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}
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s = s->obj_members;
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}
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return Index ;
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}
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printprotoerrs()
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{
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register int e,s;
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fprintf(stderr, "[ Event, State ] without any transitions :\n");
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for(e = 0; e < Nevents; e++) {
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fprintf(stderr, "Event 0x%x: states ", e);
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for(s = 0; s < Nstates; s++) {
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if( Predlist[(e<<Eventshift)+s] == 0 )
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fprintf(stderr, "0x%x ", s);
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}
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fprintf(stderr, "\n");
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}
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}
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#ifndef LINT
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dump_predtable(f)
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FILE *f;
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{
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struct Predicate *p;
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register int e,s, hadapred;
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int defaultindex;
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int defaultItrans;
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extern int bytesmalloced;
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extern int byteswasted;
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#ifdef notdef
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fprintf(stdout,
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" Xebec used %8d bytes of storage, wasted %8d bytes\n",
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bytesmalloced, byteswasted);
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#endif notdef
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fprintf(stdout,
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" %8d states\n %8d events\n %8d transitions\n",
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Nstates, Nevents, Ntrans);
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fprintf(stdout,
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" %8d predicates\n %8d default predicates used\n",
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Npred, Ndefpred);
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fprintf(stdout,
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" %8d null actions\n",
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Nnulla);
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putdriver(f, 5);
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for(e = 0; e < Nevents; e++) { for(s = 0; s < Nstates; s++) {
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p = Predlist[(e<<Eventshift)+s];
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hadapred=0;
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defaultindex=0;
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defaultItrans=0;
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if(p) {
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IFDEBUG(d)
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fflush(f);
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ENDDEBUG
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while(p) {
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if(p->p_str) {
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if(!hadapred)
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fprintf(f, "case 0x%x:\n\t", (e<<Eventshift) + s);
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hadapred = 1;
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fprintf(f, "if %s return 0x%x;\n\t else ",
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p->p_str, p->p_index);
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} else {
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if(defaultindex) {
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fprintf(stderr,
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"\nConflict between transitions %d and %d: duplicate default \n",
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p->p_transno, defaultItrans);
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Exit(-1);
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}
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defaultindex = p->p_index;
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defaultItrans = p->p_transno;
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}
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p = p->p_next;
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}
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if( hadapred) {
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fprintf(f, "return 0x%x;\n", defaultindex);
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}
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IFDEBUG(d)
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fflush(f);
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ENDDEBUG
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}
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IFDEBUG(g)
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fprintf(stdout,
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"loop: e 0x%x s 0x%x hadapred 0x%x dindex 0x%x for trans 0x%x\n",
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e, s, hadapred, defaultindex, defaultItrans);
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ENDDEBUG
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if ( hadapred ) {
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/* put a -1 in the array - Predlist is temporary storage */
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Predlist[(e<<Eventshift)+s] = (struct Predicate *)(-1);
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} else {
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/* put defaultindex in the array */
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/* if defaultindex is zero, then the driver will
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* cause an erroraction (same as if no default
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* were given and none of the predicates were true;
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* also same as if no preds or defaults were given
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* for this combo)
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*/
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Predlist[(e<<Eventshift)+s] = (struct Predicate *)(defaultindex);
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}
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} }
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fprintf(f, "default: return 0;\n} /* end switch */\n");
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#ifdef notdef
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fprintf(f, "/*NOTREACHED*/return 0;\n} /* _Xebec_index() */\n");
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#else notdef
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fprintf(f, "} /* _Xebec_index() */\n");
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#endif notdef
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fprintf(f, "static int inx[%d][%d] = { {", Nevents+1,Nstates);
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for(s = 0; s< Nstates; s++) fprintf(f, "0,"); /* event 0 */
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fprintf(f, "},\n");
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for(e = 0; e < Nevents; e++) {
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fprintf(f, " {");
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for(s = 0; s < Nstates; s++) {
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register struct Predicate *xyz = Predlist[(e<<Eventshift)+s];
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/* this kludge is to avoid a lint msg. concerning
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* loss of bits
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*/
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if (xyz == (struct Predicate *)(-1))
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fprintf(f, "-1,");
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else
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fprintf(f, "0x%x,", Predlist[(e<<Eventshift)+s]);
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}
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fprintf(f, " },\n");
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}
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fprintf(f, "};");
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}
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#endif LINT
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char *
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stash(buf)
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char *buf;
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{
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register int len;
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register char *c;
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/* grot */
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len = strlen(buf);
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c = Malloc(len+1);
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#ifdef LINT
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c =
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#endif LINT
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strcpy(c, buf);
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IFDEBUG(z)
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fprintf(stdout,"stash %s at 0x%x\n", c,c);
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ENDDEBUG
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return(c);
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}
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#ifdef notdef
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dump_pentry(event,state)
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int event,state;
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{
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register struct Predicate *p, **q;
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for(
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((q = &Predlist[(event<<Eventshift) +state]),
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(p = Predlist[(event<<Eventshift) + state]));
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p!= (struct Predicate *)0 ; p = p->p_next ) {
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#ifndef LINT
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IFDEBUG(a)
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fprintf(OUT,
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"dump_pentry for event 0x%x, state 0x%x is 0x%x\n",
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event, state, p);
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ENDDEBUG
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#endif LINT
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q = &p->p_next;
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}
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}
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#endif notdef
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