harvey/sys/src/cmd/spin/pangen2.h

/***** spin: pangen2.h *****/

/* Copyright (c) 1991-2000 by Lucent Technologies - Bell Laboratories     */
/* All Rights Reserved.  This software is for educational purposes only.  */
/* Permission is given to distribute this code provided that this intro-  */
/* ductory message is not removed and no monies are exchanged.            */
/* No guarantee is expressed or implied by the distribution of this code. */
/* Software written by Gerard J. Holzmann as part of the book:            */
/* `Design and Validation of Computer Protocols,' ISBN 0-13-539925-4,     */
/* Prentice Hall, Englewood Cliffs, NJ, 07632.                            */
/* Send bug-reports and/or questions to: gerard@research.bell-labs.com    */

static char *Nvr1[] = {		/* allow separate compilation */
	"#ifdef VERI",
	"void",
	"check_claim(int st)",
	"{",
	"	if (st == endclaim)",
	"		uerror(\"claim violated!\");",
	"	if (stopstate[VERI][st])",
	"		uerror(\"endstate in claim reached\");",
	"}",
	"#endif",
	0,
};

static char *Pre0[] = {
	"#include <stdio.h>",
	"#include <signal.h>",
	"#include <stdlib.h>",
	"#include <string.h>",	/* was strings.h -- string.h is ANSI */
/* new */
	"#include <errno.h>",
/* end */
	"#define Offsetof(X, Y)	((unsigned long)(&(((X *)0)->Y)))",
	"#ifndef max",
	"#define max(a,b) (((a)<(b)) ? (b) : (a))",
	"#endif",
	0,
};

static char *Preamble[] = {

	"#ifdef CNTRSTACK",
	"#define onstack_now()	(LL[trpt->j6] && LL[trpt->j7])",
	"#define onstack_put()	 LL[trpt->j6]++; LL[trpt->j7]++",
	"#define onstack_zap()	 LL[trpt->j6]--; LL[trpt->j7]--",
	"#endif",

	"#if !defined(SAFETY) && !defined(NOCOMP)",
		/*
		 * V_A identifies states in the current statespace
		 * A_V identifies states in the 'other' statespace
		 * S_A remembers how many leading bytes in the sv
		 * are used for these markers + fairness bits
		 */
		"#define V_A	(((now._a_t&1)?2:1) << (now._a_t&2))",
		"#define A_V	(((now._a_t&1)?1:2) << (now._a_t&2))",
		"int	S_A = 0;",
	"#else",
		"#define V_A	0",
		"#define A_V	0",
		"#define S_A	0",
	"#endif",

"#ifdef MA",
	"#define onstack_put()	;",
	"#define onstack_zap()	gstore((char *) &now, vsize, 4)",
"#else",
	"#if defined(FULLSTACK) && !defined(BITSTATE)",
	"#define onstack_put()	trpt->ostate = Lstate",
	"#define onstack_zap()	{ \\",
	"	if (trpt->ostate) \\",
	"		trpt->ostate->tagged = \\",
	"		(S_A)? (trpt->ostate->tagged&~V_A) : 0; \\",
	"	}",
	"#endif",
"#endif",

	"struct H_el {",
	"	struct H_el *nxt;",
	"#ifdef FULLSTACK",
	"	unsigned tagged;",
		"#if defined(BITSTATE) && !defined(NOREDUCE) && !defined(SAFETY)",
		"	unsigned proviso;", /* uses just 1 bit 0/1 */
		"#endif",
	"#endif",
	"#if defined(CHECK) || (defined(COLLAPSE) && !defined(FULLSTACK))",
	"	unsigned long st_id;",
	"#endif",
	"#ifdef COLLAPSE",
		"#if VECTORSZ<65536",
	"	unsigned short ln;",	/* length of vector */
		"#else",
	"	unsigned long ln;",	/* length of vector */
		"#endif",
	"#endif",
	"#ifdef REACH",
	"	unsigned D;",
	"#endif",
	"	unsigned state;",
	"} **H_tab, **S_Tab;\n",

	"typedef struct Trail {",
	"	short st;	/* current state */",
	"	uchar pr;	/* process id */",
	"	uchar tau;	/* 8 bit-flags */",
	"	uchar o_pm;	/* 8 more bit-flags */",
	"#if 0",
	"	Meaning of bit-flags:",
	"	tau&1   -> timeout enabled",
	"	tau&2   -> request to enable timeout 1 level up (in claim)",
	"	tau&4   -> current transition is a  claim move",
	"	tau&8   -> current transition is an atomic move",
	"	tau&16  -> last move was truncated on stack",
	"	tau&32  -> current transition is a preselected move",
	"	tau&64  -> at least one next state is not on the stack",
	"	tau&128 -> current transition is a stutter move",

	"	o_pm&1	-> the current pid moved -- implements else",
	"	o_pm&2	-> this is an acceptance state",
	"	o_pm&4	-> this is a  progress state",
	"	o_pm&8	-> fairness alg rule 1 undo mark",
	"	o_pm&16	-> fairness alg rule 3 undo mark",
	"	o_pm&32	-> fairness alg rule 2 undo mark",
	"	o_pm&64 -> the current proc applied rule2",
	"	o_pm&128 -> a fairness, dummy move - all procs blocked",
	"#endif",
	"#if defined(FULLSTACK) && defined(MA)",
	"	uchar proviso;",
	"#endif",
	"	char  o_n, o_ot, o_m;	/* to save locals */",
	"#ifdef EVENT_TRACE",
		"#if nstates_event<256",
	"	uchar o_event;",
		"#else",
	"	unsigned short o_event;",
		"#endif",
	"#endif",
	"	short o_tt, o_To;", /* used in new_state()  */
	"#ifdef HAS_UNLESS",
	"	short e_state;	/* if escape trans - state of origin */",
	"#endif",
	"#if defined(FULLSTACK) && !defined(MA)",
	"	struct H_el *ostate;	/* pointer to stored state */",
	"#endif",
	"#ifdef CNTRSTACK",
	"	long	j6, j7;",
	"#endif",
	"	Trans *o_t;",	/* transition fct, next state   */
	"	union {",
	"		int oval;",	/* single backup value of variable */
	"		int *ovals;",	/* ptr to multiple values */
	"	} bup;",
	"} Trail;",
	"Trail	*trail, *trpt;",

	"FILE	*efd;",
	"uchar	*this;",
	"long	maxdepth=10000;",
	"#ifdef SC",	/* stack cycling */
	"long	omaxdepth;",
	"char	*stackfile;",
 	"#endif",
	"uchar	*SS, *LL;",
	"uchar	HASH_NR = 0;",
	"",
	"#ifdef MEMCNT",
	"double memcnt = (double) 0;",
	"double overhead = (double) 0;",
	"double memlim = (double) (1<<30);",
	"#endif",
	"/* for emalloc: */",
	"static char *have;",
	"static long left = 0L;",
	"static double fragment = (double) 0;",
	"static unsigned long grow;",
	"",
	"unsigned int HASH_CONST[] = {",
	"	/* asuming 4 bytes per int */",
	"	0x88888EEF,	0x00400007,",
	"	0x04c11db7,	0x100d4e63,",
	"	0x0fc22f87,	0x3ff0c3ff,",
	"	0x38e84cd7,	0x02b148e9,",
	"	0x98b2e49d,	0xb616d379,",
	"	0xa5247fd9,	0xbae92a15,",
	"	0xb91c8bc5,	0x8e5880f3,",
	"	0xacd7c069,	0xb4c44bb3,",
	"	0x2ead1fb7,	0x8e428171,",
	"	0xdbebd459,	0x828ae611,",
	"	0x6cb25933,	0x86cdd651,",
	"	0x9e8f5f21,	0xd5f8d8e7,",
	"	0x9c4e956f,	0xb5cf2c71,",
	"	0x2e805a6d,	0x33fc3a55,",
	"	0xaf203ed1,	0xe31f5909,",
	"	0x5276db35,	0x0c565ef7,",
	"	0x273d1aa5,	0x8923b1dd,",
	"	0",
	"};",
	"int	mreached=0, done=0, errors=0, Nrun=1, single=0;",
	"double	nstates=0, nlinks=0, truncs=0, truncs2=0;",
	"double	nlost=0, nShadow=0, hcmp=0, ngrabs=0;",
	"unsigned long	nr_states=0; /* nodes in DFA */",
	"long	Fa=0, Fh=0, Zh=0, Zn=0;",
	"long	PUT=0, PROBE=0, ZAPS=0;",
	"long	Ccheck=0, Cholds=0;",
	"unsigned long mask;",
	"int	a_cycles=0, upto=1, strict=0, verbose = 0;",
	"int	state_tables=0, fairness=0, no_rck=0, Nr_Trails=0;",
	"#ifndef INLINE",
	"int	TstOnly=0;",
	"#endif",
	"#ifdef BITSTATE",
	"int	ssize=22;",
	"#else",
	"int	ssize=18;",
	"#endif",
	"int	hmax=0, svmax=0, smax=0;",
	"int	Maxbody=0, XX;",
	"uchar	*noptr;	/* used by macro Pptr(x) */",
	"State	A_Root;		/* root of acceptance cycles */",
	"State	now;		/* the full state vector */",
	"#ifdef VAR_RANGES",
	"void logval(char *, int);",
	"void dumpranges(void);",
	"#endif",

	"#ifdef MA",
	"#define INLINE_REV",
	"extern void dfa_init(unsigned short);",
	"extern int  dfa_member(unsigned short);",
	"extern int  dfa_store(unsigned char *);",
	"unsigned int	maxgs = 0;",
	"#endif",

	"#if !defined(NOCOMP) || defined(BITSTATE)",
	"State	comp_now;	/* compressed state vector */",
	"State	comp_msk;",
	"uchar	*Mask = (uchar *) &comp_msk;",
	"#endif",
	"#ifdef COLLAPSE",
	"State	comp_tmp;",
	"char	*scratch = (char *) &comp_tmp;",
	"#endif",

	"Stack	*stack; 	/* for queues, processes */",
	"Svtack	*svtack;	/* for old state vectors */",
	"long	J1, J2, J3, J4, j1, j2, j3, j4;",
	"long	A_depth = 0, depth = 0;",
	"uchar	warned = 0, iterative = 0, like_java = 0, every_error = 0;",
	"uchar	noasserts = 0, noends = 0;",
	"#if SYNC>0 && ASYNC==0",
	"void set_recvs(void);",
	"int  no_recvs(int);",
	"#endif",
	"#if SYNC",
	"#define IfNotBlocked	if (boq != -1) continue;",
	"#define UnBlock     	boq = -1",
	"#else",
	"#define IfNotBlocked	/* cannot block */",
	"#define UnBlock     	/* don't bother */",
	"#endif\n",
	"void active_procs(void);",
	"void cleanup(void);",
	"void do_the_search(void);",
	"void find_shorter(int);",
	"void iniglobals(void);",
	"void stopped(int);",
	"void wrapup(void);",
#if 0
	"void bup_q(int, int);",
	"void unbup_q(int, int);",
#endif
	"int *grab_ints(int);",
	"void ungrab_ints(int *, int);",
	0,
};

static char *Tail[] = {
	"Trans *",
	"settr(	int t_id, int a, int b, int c, int d,",
	"	char *t, int g, int tpe0, int tpe1)",
	"{	Trans *tmp = (Trans *) emalloc(sizeof(Trans));\n",
	"	tmp->atom  = a&(6|32);	/* only (2|8|32) have meaning */",
	"	if (!g) tmp->atom |= 8;	/* no global references */",
	"	tmp->st    = b;",
	"	tmp->tpe[0] = tpe0;",
	"	tmp->tpe[1] = tpe1;",
	"	tmp->tp    = t;",
	"	tmp->t_id  = t_id;",
	"	tmp->forw  = c;",
	"	tmp->back  = d;",
	"	return tmp;",
	"}\n",
	"Trans *",
	"cpytr(Trans *a)",
	"{	Trans *tmp = (Trans *) emalloc(sizeof(Trans));\n",
	"	int i;",
	"	tmp->atom  = a->atom;",
	"	tmp->st    = a->st;",
	"#ifdef HAS_UNLESS",
	"	tmp->e_trans = a->e_trans;",
	"	for (i = 0; i < HAS_UNLESS; i++)",
	"		tmp->escp[i] = a->escp[i];",
	"#endif",
	"	tmp->tpe[0] = a->tpe[0];",
	"	tmp->tpe[1] = a->tpe[1];",
	"	for (i = 0; i < 6; i++)",
	"	{	tmp->qu[i] = a->qu[i];",
	"		tmp->ty[i] = a->ty[i];",
	"	}",
	"	tmp->tp    = (char *) emalloc(strlen(a->tp)+1);",
	"	strcpy(tmp->tp, a->tp);",
	"	tmp->t_id  = a->t_id;",
	"	tmp->forw  = a->forw;",
	"	tmp->back  = a->back;",
	"	return tmp;",
	"}\n",
	"#ifndef NOREDUCE",
	"int",
	"srinc_set(int n)",
	"{	if (n <= 2) return LOCAL;",
	"	if (n <= 2+  DELTA) return Q_FULL_F; /* 's' or nfull  */",
	"	if (n <= 2+2*DELTA) return Q_EMPT_F; /* 'r' or nempty */",
	"	if (n <= 2+3*DELTA) return Q_EMPT_T; /* empty */",
	"	if (n <= 2+4*DELTA) return Q_FULL_T; /* full  */",
	"	if (n ==   5*DELTA) return GLOBAL;",
	"	if (n ==   6*DELTA) return TIMEOUT_F;",
	"	if (n ==   7*DELTA) return ALPHA_F;",
	"	Uerror(\"cannot happen srinc_class\");",
	"	return BAD;",
	"}",
	"int",
	"srunc(int n, int m)",
	"{	switch(m) {",
	"	case Q_FULL_F: return n-2;",
	"	case Q_EMPT_F: return n-2-DELTA;",
	"	case Q_EMPT_T: return n-2-2*DELTA;",
	"	case Q_FULL_T: return n-2-3*DELTA;",
	"	case ALPHA_F:",
	"	case TIMEOUT_F: return 257; /* non-zero, and > MAXQ */",
	"	}",
	"	Uerror(\"cannot happen srunc\");",
	"	return 0;",
	"}",
	"#endif",
/* new */
	"uchar *visited;",
	"void",
	"dovisit(int n, int m, int is, uchar reach[])",
	"{	Trans *z;",
	"	if (is >= m || !trans[n][is]",
	"	||  is <= 0 || visited[is])",
	"		return;",
	"	visited[is] = 1;",
	"	for (z = trans[n][is]; z; z = z->nxt)",
	"	{	int i, j;",
	"		dovisit(n, m, z->st, reach);",
	"#ifdef HAS_UNLESS",
	"		for (i = 0; i < HAS_UNLESS; i++)",
	"		{	j = trans[n][is]->escp[i];",
	"			if (!j) break;",
	"			dovisit(n, m, j, reach);",
	"		}",
	"#endif",
	"	}",
	"}",
	"void",
	"check_unreachable(int n, int m, int is, short srcln[], uchar reach[])",
	"{	int i; static int oldm=0;",
	"	if (m > oldm)	/* not much memory */",
	"	{	visited = (uchar *) emalloc(m * sizeof(uchar));",
	"		oldm = m;",
	"	} else",
	"		memset(visited, 0, m);",
	"	dovisit(n, m, is, reach);",
	"	for (i = 1; i < m; i++)",
	"		if (!visited[i] && reach[i] == 0)",
	"		{	if (0) printf(\"%%s: merged state %%d, line %%d\\n\",",
	"				procname[n], i, srcln[i]);",
	"			reach[i] = 1;",
	"		}",
	"}",

	"int cnt;",
	"int",
	"isthere(Trans *a, int b)", /* is b already in a's list? */
	"{	Trans *t;",
	"	for (t = a; t; t = t->nxt)",
	"		if (t->t_id == b)",
	"			return 1;",
	"	return 0;",
	"}",
	"#ifndef NOREDUCE",
	"int",
	"mark_safety(Trans *t) /* for conditional safety */",
	"{	int g = 0, h, i, j, k;",
	"",
	"	if (!t) return 0;",
	"	if (t->qu[0])",
	"		return (t->qu[1])?2:1;	/* marked */",
	"",
	"	for (i = 0; i < 2; i++)",
	"	{	j = srinc_set(t->tpe[i]);",
	"		if (j >= GLOBAL)",
	"			return -1;",
	"		if (j != LOCAL)",
	"		{	k = srunc(t->tpe[i], j);",
	"			if (g == 0",
	"			||  t->qu[0] != k",
	"			||  t->ty[0] != j)",
	"			{	t->qu[g] = k;",
	"				t->ty[g] = j;",
	"				g++;",
	"	}	}	}",
	"	return g;",
	"}",
	"#endif",
	"void",
	"retrans(int n, int m, int is, short srcln[], uchar reach[])",
	"	/* process n, with m states, is=initial state */",
	"{	Trans *T0, *T1, *T2, *T3;",
	"	int i, j, k, p, h, g, aa;",
	"	if (state_tables >= 4)",
	"	{	printf(\"STEP 1 proctype %%s\\n\", ",
	"			procname[n]);",
	"		for (i = 1; i < m; i++)",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"			crack(n, i, T0, srcln);",
	"		return;",
	"	}",
	"	do {",
	"		for (i = 1, cnt = 0; i < m; i++)",
	"		{	T2 = trans[n][i];",
	"			T1 = T2?T2->nxt:(Trans *)0;",
	"/* prescan: */		for (T0 = T1; T0; T0 = T0->nxt)",
	"/* choice in choice */	{	if (T0->st && trans[n][T0->st]",
	"				&&  trans[n][T0->st]->nxt)",
	"					break;",
	"			}",
	"#if 0",
	"		if (T0)",
	"		printf(\"\\tstate %%d / %%d: choice in choice\\n\",",
	"		i, T0->st);",
	"#endif",
	"			if (T0)",
	"			for (T0 = T1; T0; T0 = T0->nxt)",
	"			{	T3 = trans[n][T0->st];",
	"				if (!T3->nxt)",
	"				{	T2->nxt = cpytr(T0);",
	"					T2 = T2->nxt;",
	"					imed(T2, T0->st, n);",
	"					continue;",
	"				}",
	"				do {	T3 = T3->nxt;",
	"					T2->nxt = cpytr(T3);",
	"					T2 = T2->nxt;",
	"					imed(T2, T0->st, n);",
	"				} while (T3->nxt);",
	"				cnt++;",
	"			}",
	"		}",
	"	} while (cnt);",

	"	if (state_tables >= 3)",
	"	{	printf(\"STEP 2 proctype %%s\\n\", ",
	"			procname[n]);",
	"		for (i = 1; i < m; i++)",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"			crack(n, i, T0, srcln);",
	"		return;",
	"	}",
	"	for (i = 1; i < m; i++)",
	"	{	if (trans[n][i] && trans[n][i]->nxt) /* optimize */",
	"		{	T1 = trans[n][i]->nxt;",
	"#if 0",
	"			printf(\"\\t\\tpull %%d (%%d) to %%d\\n\",",
	"			T1->st, T1->forw, i);",
	"#endif",
	"			if (!trans[n][T1->st]) continue;",
	"			T0 = cpytr(trans[n][T1->st]);",
	"			trans[n][i] = T0;",
	"			reach[T1->st] = 1;",
	"			imed(T0, T1->st, n);",
	"			for (T1 = T1->nxt; T1; T1 = T1->nxt)",
	"			{",
	"#if 0",
	"			printf(\"\\t\\tpull %%d (%%d) to %%d\\n\",",
	"				T1->st, T1->forw, i);",
	"#endif",
	"				if (!trans[n][T1->st]) continue;",
	"				T0->nxt = cpytr(trans[n][T1->st]);",
	"				T0 = T0->nxt;",
	"				reach[T1->st] = 1;",
	"				imed(T0, T1->st, n);",
	"	}	}	}",
	"	if (state_tables >= 2)",
	"	{	printf(\"STEP 3 proctype %%s\\n\", ",
	"			procname[n]);",
	"		for (i = 1; i < m; i++)",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"			crack(n, i, T0, srcln);",
	"		return;",
	"	}",
	"#ifdef HAS_UNLESS",
	"	for (i = 1; i < m; i++)",
	"	{	if (!trans[n][i]) continue;",
	"		/* check for each state i if an",
	"		 * escape to some state p is defined",
	"		 * if so, copy and mark p's transitions",
	"		 * and prepend them to the transition-",
	"		 * list of state i",
	"		 */",
	" if (!like_java) /* the default */",
	" {		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"		for (k = HAS_UNLESS-1; k >= 0; k--)",
	"		{	if (p = T0->escp[k])",
	"			for (T1 = trans[n][p]; T1; T1 = T1->nxt)",
	"			{	if (isthere(trans[n][i], T1->t_id))",
	"					continue;",
	"				T2 = cpytr(T1);",
	"				T2->e_trans = p;",
	"				T2->nxt = trans[n][i];",
	"				trans[n][i] = T2;",
	"		}	}",
	" } else /* outermost unless checked first */",
	" {		Trans *T4;",
	"		T4 = T3 = (Trans *) 0;",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"		for (k = HAS_UNLESS-1; k >= 0; k--)",
	"		{	if (p = T0->escp[k])",
	"			for (T1 = trans[n][p]; T1; T1 = T1->nxt)",
	"			{	if (isthere(trans[n][i], T1->t_id))",
	"					continue;",
	"				T2 = cpytr(T1);",
	"				T2->nxt = (Trans *) 0;",
	"				T2->e_trans = p;",
	"				if (T3)	T3->nxt = T2;",
	"				else	T4 = T2;",
	"				T3 = T2;",
	"		}	}",
	"		if (T4)",
	"		{	T3->nxt = trans[n][i];",
	"			trans[n][i] = T4;",
	"		}",
	" }",
	"	}",
	"#endif",

	"#ifndef NOREDUCE",
	"	for (i = 1; i < m; i++)",
	"	{",
	"		if (a_cycles)",
	"		{ /* moves through these states are visible */",
	"#if PROG_LAB>0 && defined(HAS_NP)",
	"			if (progstate[n][i])",
	"				goto degrade;",
	"			for (T1 = trans[n][i]; T1; T1 = T1->nxt)",
	"				if (progstate[n][T1->st])",
	"					goto degrade;",
	"#endif",
	"			if (accpstate[n][i] || visstate[n][i])",
	"				goto degrade;",
	"			for (T1 = trans[n][i]; T1; T1 = T1->nxt)",
	"				if (accpstate[n][T1->st])",
	"					goto degrade;",
	"		}",
	"		T1 = trans[n][i];",
	"		if (!T1) continue;",
	"		g = mark_safety(T1);	/* V3.3.1 */",
	"		if (g < 0) goto degrade; /* global */",
	"		/* check if mixing of guards preserves reduction */",
	"		if (T1->nxt)",
	"		{	k = 0;",
	"			for (T0 = T1; T0; T0 = T0->nxt)",
	"			{	if (!(T0->atom&8))",
	"					goto degrade;",
	"				for (aa = 0; aa < 2; aa++)",
	"				{	if (srinc_set(T0->tpe[aa])",
	"					>=  GLOBAL)",
	"						goto degrade;",
	"					if (T0->tpe[aa]",
	"					&&  T0->tpe[aa]",
	"					!=  T1->tpe[0])",
	"						k = 1;",
	"			}	}",
	"			/* g = 0;	V3.3.1 */",
	"			if (k)	/* non-uniform selection */",
	"			for (T0 = T1; T0; T0 = T0->nxt)",
	"			for (aa = 0; aa < 2; aa++)",
	"			{	j = srinc_set(T0->tpe[aa]);",
	"				if (j != LOCAL)",
	"				{	k = srunc(T0->tpe[aa], j);",
	"					for (h = 0; h < 6; h++)",
	"						if (T1->qu[h] == k",
	"						&&  T1->ty[h] == j)",
	"							break;",
	"					if (h >= 6)",
	"					{	T1->qu[g%%6] = k;",
	"						T1->ty[g%%6] = j;",
	"						g++;",
	"			}	}	}",
	"			if (g > 6)",
	"			{	T1->qu[0] = 0;	/* turn it off */",
	"#if 1",
	"				printf(\"pan: warning, line %%d, \",",
	"					srcln[i]);",
	"			 	printf(\"too many stmnt types (%%d)\",",
	"					g);",
	"			  	printf(\" in selection\\n\");",
	"#endif",
	"			  goto degrade;",
	"			}",
	"		}",
	"		/* mark all options global if >=1 is global */",
	"		for (T1 = trans[n][i]; T1; T1 = T1->nxt)",
	"			if (!(T1->atom&8)) break;",
	"		if (T1)",
	"degrade:	for (T1 = trans[n][i]; T1; T1 = T1->nxt)",
	"			T1->atom &= ~8;	/* mark as unsafe */",

	"		/* can only mix 'r's or 's's if on same chan */",
	"		/* and not mixed with other local operations */",
	"		T1 = trans[n][i];",

	"		if (!T1 || T1->qu[0]) continue;",

	"		j = T1->tpe[0];",
	"		if (T1->nxt && T1->atom&8)",
	"		{ if (j == 5*DELTA)",
	"		  {",
	"#if 1",
	"			printf(\"warning: line %%d \", srcln[i]);",
	"			printf(\"mixed condition \");",
	"			printf(\"(defeats reduction)\\n\");",
	"#endif",
	"			goto degrade;",
	"		  }",
	"		  for (T0 = T1; T0; T0 = T0->nxt)",
	"		  for (aa = 0; aa < 2; aa++)",
	"		  if  (T0->tpe[aa] && T0->tpe[aa] != j)",
	"		  {",
	"#if 1",
	"			printf(\"warning: line %%d \", srcln[i]);",
	"			printf(\"[%%d-%%d] mixed %%stion \",",
	"				T0->tpe[aa], j, ",
	"				(j==5*DELTA)?\"condi\":\"selec\");",
	"			printf(\"(defeats reduction)\\n\");",
	"			printf(\"	'%%s' <-> '%%s'\\n\",",
	"				T1->tp, T0->tp);",
	"#endif",
	"			goto degrade;",
	"		} }",
	"	}",
	"#endif",
	"	for (i = 1; i < m; i++)",	/* R */
	"	{	T2 = trans[n][i];",
	"		if (!T2",
	"		||  T2->nxt",
	"		||  strncmp(T2->tp, \".(goto)\", 7)",
	"		||  !stopstate[n][i])",
	"			continue;",
	"		stopstate[n][T2->st] = 1;",
	"	}",
	"	if (state_tables)",
	"	{	printf(\"proctype \");",
	"		if (!strcmp(procname[n], \":init:\"))",
	"			printf(\"init\\n\");",
	"		else",
	"			printf(\"%%s\\n\", procname[n]);",
	"		for (i = 1; i < m; i++)",
	"			reach[i] = 1;",
	"		tagtable(n, m, is, srcln, reach);",
	"	} else",
	"	for (i = 1; i < m; i++)",
	"	{	int nrelse;",
	"		if (strcmp(procname[n], \":never:\") != 0)",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"		{	if (T0->st == i",
	"			&& strcmp(T0->tp, \"(1)\") == 0)",
	"			{	printf(\"error: proctype '%%s' \",",
	"					procname[n]);",
	"		  		printf(\"line %%d, state %%d: has un\",",
	"					srcln[i], i);",
	"				printf(\"conditional self-loop\\n\");",
	"				exit(1);",
	"		}	}",
	"		nrelse = 0;",
	"		for (T0 = trans[n][i]; T0; T0 = T0->nxt)",
	"		{	if (strcmp(T0->tp, \"else\") == 0)",
	"				nrelse++;",
	"		}",
	"		if (nrelse > 1)",
	"		{	printf(\"error: proctype '%%s' state\",",
	"				procname[n]);",
	"		  	printf(\" %%d, inherits %%d\", i, nrelse);",
	"		  	printf(\" 'else' stmnts\\n\");",
	"			exit(1);",
	"	}	}",
	"	check_unreachable(n, m, is, srcln, reach);",
	"}\n",
	"void",
	"imed(Trans *T, int v, int n)	/* set intermediate state */",
	"{	progstate[n][T->st] |= progstate[n][v];",
	"	accpstate[n][T->st] |= accpstate[n][v];",
	"	stopstate[n][T->st] |= stopstate[n][v];",
	"}\n",
	"void",
	"tagtable(int n, int m, int is, short srcln[], uchar reach[])",
	"{	Trans *z;\n",
	"	if (is >= m || !trans[n][is]",
	"	||  is <= 0 || reach[is] == 0)",
	"		return;",
	"	reach[is] = 0;",
	"	if (state_tables)",
	"	for (z = trans[n][is]; z; z = z->nxt)",
	"		crack(n, is, z, srcln);",
	"	for (z = trans[n][is]; z; z = z->nxt)",
	"	{	int i, j;",
	"		tagtable(n, m, z->st, srcln, reach);",
	"#ifdef HAS_UNLESS",
	"		for (i = 0; i < HAS_UNLESS; i++)",
	"		{	j = trans[n][is]->escp[i];",
	"			if (!j) break;",
	"			tagtable(n, m, j, srcln, reach);",
	"		}",
	"#endif",
	"	}",
	"}\n",
	"void",
	"crack(int n, int j, Trans *z, short srcln[])",
	"{	int i;\n",
	"	if (!z) return;",
	"	printf(\"\tstate %%3d -(tr %%3d)-> state %%3d  \",",
	"		j, z->forw, z->st);",
	"	printf(\"[id %%3d tp %%3d\", z->t_id, z->tpe[0]);",
	"	if (z->tpe[1]) printf(\",%%d\", z->tpe[1]);",
	"#ifdef HAS_UNLESS",
	"	if (z->e_trans)",
	"		printf(\" org %%3d\", z->e_trans);",
	"	else if (state_tables >= 2)",
	"	for (i = 0; i < HAS_UNLESS; i++)",
	"	{	if (!z->escp[i]) break;",
	"		printf(\" esc %%d\", z->escp[i]);",
	"	}",
	"#endif",
	"	printf(\"]\");",
	"	printf(\" [%%s%%s%%s%%s%%s] line %%d => \",",
	"		z->atom&6?\"A\":z->atom&32?\"D\":\"-\",",
	"		accpstate[n][j]?\"a\" :\"-\",",
	"		stopstate[n][j]?\"e\" : \"-\",",
	"		progstate[n][j]?\"p\" : \"-\",",
	"		z->atom & 8 ?\"L\":\"G\",",
	"		srcln[j]);",
	"	for (i = 0; z->tp[i]; i++)",
	"		if (z->tp[i] == \'\\n\')",
	"			printf(\"\\\\n\");",
	"		else",
	"			putchar(z->tp[i]);",
	"#if 0",
	"	printf(\"\\n\");",
	"#else",
	"	if (z->qu[0])",
	"	{	printf(\"\\t[\");",
	"		for (i = 0; i < 6; i++)",
	"			if (z->qu[i])",
	"				printf(\"(%%d,%%d)\",",
	"				z->qu[i], z->ty[i]);",
	"		printf(\"]\");",
	"	}",
	"	printf(\"\\n\");",
	"#endif",
	"	fflush(stdout);",
	"}",
	"",
	"#ifdef VAR_RANGES",
	"#define BYTESIZE	32	/* 2^8 : 2^3 = 256:8 = 32 */",
	"",
	"typedef struct Vr_Ptr {",
	"	char	*nm;",
	"	unsigned char vals[BYTESIZE];",
	"	struct Vr_Ptr *nxt;",
	"} Vr_Ptr;",
	"Vr_Ptr *ranges = (Vr_Ptr *) 0;",
	"",
	"void",
	"logval(char *s, int v)",
	"{	Vr_Ptr *tmp;",
	"",
	"	if (v<0 || v > 255) return;",
	"	for (tmp = ranges; tmp; tmp = tmp->nxt)",
	"		if (!strcmp(tmp->nm, s))",
	"			goto found;",
	"	tmp = (Vr_Ptr *) emalloc(sizeof(Vr_Ptr));",
	"	tmp->nxt = ranges;",
	"	ranges = tmp;",
	"	tmp->nm = s;",
	"found:",
	"	tmp->vals[(v)/8] |= 1<<((v)%%8);",
	"}",
	"",
	"void",
	"dumpval(unsigned char X[], int range)",
	"{	int w, x, i, j = -1;",
	"",
	"	for (w = i = 0; w < range; w++)",
	"	for (x = 0; x < 8; x++, i++)",
	"	{",
	"from:		if ((X[w] & (1<<x)))",
	"		{	printf(\"%%d\", i);",
	"			j = i;",
	"			goto upto;",
	"	}	}",
	"	return;",
	"	for (w = 0; w < range; w++)",
	"	for (x = 0; x < 8; x++, i++)",
	"	{",
	"upto:		if (!(X[w] & (1<<x)))",
	"		{	if (i-1 == j)",
	"				printf(\", \");",
	"			else",
	"				printf(\"-%%d, \", i-1);",
	"			goto from;",
	"	}	}",
	"	if (j >= 0 && j != 255)",
	"		printf(\"-255\");",
	"}",
	"",
	"void",
	"dumpranges(void)",
	"{	Vr_Ptr *tmp;",
	"	printf(\"\\nValues assigned within \");",
	"	printf(\"interval [0..255]:\\n\");",
	"	for (tmp = ranges; tmp; tmp = tmp->nxt)",
	"	{	printf(\"\\t%%s\\t: \", tmp->nm);",
	"		dumpval(tmp->vals, BYTESIZE);",
	"		printf(\"\\n\");",
	"	}",
	"}",
	"#endif",
	0,
};