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Switch use of '\0' to NULL

Fix a clang 10 warning about comparing a pointer to a null character. The
condition "if ((s = symnam[i]) == '\0')" used to be "if (s = symnam[i])"
and the incorrect spelling of NULL was chosen in a -Wall cleanup 19 years
ago (-r 1.6). Upstream uses a naked 0 instead of NULL, so does NetBSD.

ok martijn millert

/*	$OpenBSD: output.c,v 1.28 2020/09/03 04:19:53 tb Exp $	*/
/*	$NetBSD: output.c,v 1.4 1996/03/19 03:21:41 jtc Exp $	*/

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Paul Corbett.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "defs.h"

static int nvectors;
static int nentries;
static short **froms;
static short **tos;
static short *tally;
static short *width;
static short *state_count;
static short *order;
static short *base;
static short *pos;
static int maxtable;
static short *table;
static short *check;
static int lowzero;
static int high;

void output_prefix(void);
void output_rule_data(void);
void output_yydefred(void);
void output_actions(void);
void token_actions(void);
void goto_actions(void);
int default_goto(int);
void save_column(int, int);
void sort_actions(void);
void pack_table(void);
int matching_vector(int);
int pack_vector(int);
void output_base(void);
void output_table(void);
void output_check(void);
int is_C_identifier(char *);
void output_defines(void);
void output_stored_text(void);
void output_debug(void);
void output_stype(void);
void output_trailing_text(void);
void output_semantic_actions(void);
void free_itemsets(void);
void free_shifts(void);
void free_reductions(void);

void
output(void)
{
	free_itemsets();
	free_shifts();
	free_reductions();
	output_prefix();
	output_stored_text();
	output_defines();
	output_rule_data();
	output_yydefred();
	output_actions();
	free_parser();
	output_debug();
	output_stype();
	if (rflag)
		write_section(tables);
	write_section(header);
	output_trailing_text();
	write_section(body);
	output_semantic_actions();
	write_section(trailer);
}


void
output_prefix(void)
{
	if (symbol_prefix == NULL)
		symbol_prefix = "yy";
	else {
		++outline;
		fprintf(code_file, "#define yyparse %sparse\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yylex %slex\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyerror %serror\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yychar %schar\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyval %sval\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yylval %slval\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yydebug %sdebug\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yynerrs %snerrs\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyerrflag %serrflag\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyss %sss\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yysslim %ssslim\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyssp %sssp\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyvs %svs\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyvsp %svsp\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yystacksize %sstacksize\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yylhs %slhs\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yylen %slen\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yydefred %sdefred\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yydgoto %sdgoto\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yysindex %ssindex\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyrindex %srindex\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yygindex %sgindex\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yytable %stable\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yycheck %scheck\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyname %sname\n", symbol_prefix);
		++outline;
		fprintf(code_file, "#define yyrule %srule\n", symbol_prefix);
	}
	++outline;
	fprintf(code_file, "#define YYPREFIX \"%s\"\n", symbol_prefix);
}


void
output_rule_data(void)
{
	int i;
	int j;

	fprintf(output_file,
	    "const short %slhs[] =\n"
	    "\t{%42d,", symbol_prefix, symbol_value[start_symbol]);

	j = 10;
	for (i = 3; i < nrules; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", symbol_value[rlhs[i]]);
	}
	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");

	fprintf(output_file,
	    "const short %slen[] =\n"
	    "\t{%42d,", symbol_prefix, 2);

	j = 10;
	for (i = 3; i < nrules; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			j++;
		fprintf(output_file, "%5d,", rrhs[i + 1] - rrhs[i] - 1);
	}
	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
}


void
output_yydefred(void)
{
	int i, j;

	fprintf(output_file,
	    "const short %sdefred[] =\n"
	    "\t{%39d,",
	    symbol_prefix, (defred[0] ? defred[0] - 2 : 0));

	j = 10;
	for (i = 1; i < nstates; i++) {
		if (j < 10)
			++j;
		else {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		}
		fprintf(output_file, "%5d,", (defred[i] ? defred[i] - 2 : 0));
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
}


void
output_actions(void)
{
	nvectors = 2 * nstates + nvars;

	froms = NEW2(nvectors, short *);
	tos = NEW2(nvectors, short *);
	tally = NEW2(nvectors, short);
	width = NEW2(nvectors, short);

	token_actions();
	free(lookaheads);
	free(LA);
	free(LAruleno);
	free(accessing_symbol);

	goto_actions();
	free(goto_map + ntokens);
	free(from_state);
	free(to_state);

	sort_actions();
	pack_table();
	output_base();
	output_table();
	output_check();
}


void
token_actions(void)
{
	int i, j;
	int shiftcount, reducecount;
	int max, min;
	short *actionrow, *r, *s;
	action *p;

	actionrow = NEW2(2*ntokens, short);
	for (i = 0; i < nstates; ++i) {
		if (parser[i]) {
			for (j = 0; j < 2 * ntokens; ++j)
				actionrow[j] = 0;
			shiftcount = 0;
			reducecount = 0;
			for (p = parser[i]; p; p = p->next) {
				if (p->suppressed == 0) {
					if (p->action_code == SHIFT) {
						++shiftcount;
						actionrow[p->symbol] = p->number;
					} else if (p->action_code == REDUCE &&
					    p->number != defred[i]) {
						++reducecount;
						actionrow[p->symbol + ntokens] = p->number;
					}
				}
			}

			tally[i] = shiftcount;
			tally[nstates+i] = reducecount;
			width[i] = 0;
			width[nstates+i] = 0;
			if (shiftcount > 0) {
				froms[i] = r = NEW2(shiftcount, short);
				tos[i] = s = NEW2(shiftcount, short);
				min = MAXSHORT;
				max = 0;
				for (j = 0; j < ntokens; ++j) {
					if (actionrow[j]) {
						if (min > symbol_value[j])
							min = symbol_value[j];
						if (max < symbol_value[j])
							max = symbol_value[j];
						*r++ = symbol_value[j];
						*s++ = actionrow[j];
					}
				}
				width[i] = max - min + 1;
			}
			if (reducecount > 0) {
				froms[nstates+i] = r = NEW2(reducecount, short);
				tos[nstates+i] = s = NEW2(reducecount, short);
				min = MAXSHORT;
				max = 0;
				for (j = 0; j < ntokens; ++j) {
					if (actionrow[ntokens+j]) {
						if (min > symbol_value[j])
							min = symbol_value[j];
						if (max < symbol_value[j])
							max = symbol_value[j];
						*r++ = symbol_value[j];
						*s++ = actionrow[ntokens+j] - 2;
					}
				}
				width[nstates+i] = max - min + 1;
			}
		}
	}
	free(actionrow);
}

void
goto_actions(void)
{
	int i, j, k;

	state_count = NEW2(nstates, short);

	k = default_goto(start_symbol + 1);
	fprintf(output_file, "const short %sdgoto[] =\n"
	    "\t{%40d,", symbol_prefix, k);
	save_column(start_symbol + 1, k);

	j = 10;
	for (i = start_symbol + 2; i < nsyms; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;

		k = default_goto(i);
		fprintf(output_file, "%5d,", k);
		save_column(i, k);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
	free(state_count);
}

int
default_goto(int symbol)
{
	int i;
	int m;
	int n;
	int default_state;
	int max;

	m = goto_map[symbol];
	n = goto_map[symbol + 1];

	if (m == n)
		return (0);

	memset(state_count, 0, nstates * sizeof(short));

	for (i = m; i < n; i++)
		state_count[to_state[i]]++;

	max = 0;
	default_state = 0;
	for (i = 0; i < nstates; i++) {
		if (state_count[i] > max) {
			max = state_count[i];
			default_state = i;
		}
	}

	return (default_state);
}



void
save_column(int symbol, int default_state)
{
	int i;
	int m;
	int n;
	short *sp;
	short *sp1;
	short *sp2;
	int count;
	int symno;

	m = goto_map[symbol];
	n = goto_map[symbol + 1];

	count = 0;
	for (i = m; i < n; i++) {
		if (to_state[i] != default_state)
			++count;
	}
	if (count == 0)
		return;

	symno = symbol_value[symbol] + 2*nstates;

	froms[symno] = sp1 = sp = NEW2(count, short);
	tos[symno] = sp2 = NEW2(count, short);

	for (i = m; i < n; i++) {
		if (to_state[i] != default_state) {
			*sp1++ = from_state[i];
			*sp2++ = to_state[i];
		}
	}

	tally[symno] = count;
	width[symno] = sp1[-1] - sp[0] + 1;
}

void
sort_actions(void)
{
	int i;
	int j;
	int k;
	int t;
	int w;

	order = NEW2(nvectors, short);
	nentries = 0;

	for (i = 0; i < nvectors; i++) {
		if (tally[i] > 0) {
			t = tally[i];
			w = width[i];
			j = nentries - 1;

			while (j >= 0 && (width[order[j]] < w))
				j--;

			while (j >= 0 && (width[order[j]] == w) &&
			    (tally[order[j]] < t))
				j--;

			for (k = nentries - 1; k > j; k--)
				order[k + 1] = order[k];

			order[j + 1] = i;
			nentries++;
		}
	}
}


void
pack_table(void)
{
	int i;
	int place;
	int state;

	base = NEW2(nvectors, short);
	pos = NEW2(nentries, short);

	maxtable = 1000;
	table = NEW2(maxtable, short);
	check = NEW2(maxtable, short);

	lowzero = 0;
	high = 0;

	for (i = 0; i < maxtable; i++)
		check[i] = -1;

	for (i = 0; i < nentries; i++) {
		state = matching_vector(i);

		if (state < 0)
			place = pack_vector(i);
		else
			place = base[state];

		pos[i] = place;
		base[order[i]] = place;
	}

	for (i = 0; i < nvectors; i++) {
		free(froms[i]);
		free(tos[i]);
	}

	free(froms);
	free(tos);
	free(pos);
}


/*  The function matching_vector determines if the vector specified by	*/
/*  the input parameter matches a previously considered	vector.  The	*/
/*  test at the start of the function checks if the vector represents	*/
/*  a row of shifts over terminal symbols or a row of reductions, or a	*/
/*  column of shifts over a nonterminal symbol.  Berkeley Yacc does not	*/
/*  check if a column of shifts over a nonterminal symbols matches a	*/
/*  previously considered vector.  Because of the nature of LR parsing	*/
/*  tables, no two columns can match.  Therefore, the only possible	*/
/*  match would be between a row and a column.  Such matches are	*/
/*  unlikely.  Therefore, to save time, no attempt is made to see if a	*/
/*  column matches a previously considered vector.			*/
/*									*/
/*  Matching_vector is poorly designed.  The test could easily be made	*/
/*  faster.  Also, it depends on the vectors being in a specific	*/
/*  order.								*/

int
matching_vector(int vector)
{
	int i, j, k, t, w, match, prev;

	i = order[vector];
	if (i >= 2*nstates)
		return (-1);

	t = tally[i];
	w = width[i];

	for (prev = vector - 1; prev >= 0; prev--) {
		j = order[prev];
		if (width[j] != w || tally[j] != t)
			return (-1);

		match = 1;
		for (k = 0; match && k < t; k++) {
			if (tos[j][k] != tos[i][k] ||
			    froms[j][k] != froms[i][k])
				match = 0;
		}

		if (match)
			return (j);
	}

	return (-1);
}



int
pack_vector(int vector)
{
	int i, j, k, l;
	int t, loc, ok;
	short *from, *to;
	int newmax;

	i = order[vector];
	t = tally[i];
	assert(t);

	from = froms[i];
	to = tos[i];

	j = lowzero - from[0];
	for (k = 1; k < t; ++k)
		if (lowzero - from[k] > j)
			j = lowzero - from[k];
	for (;; ++j) {
		if (j == 0)
			continue;
		ok = 1;
		for (k = 0; ok && k < t; k++) {
			loc = j + from[k];
			if (loc >= maxtable) {
				if (loc >= MAXTABLE)
					fatal("maximum table size exceeded");

				newmax = maxtable;
				do {
					newmax += 200;
				} while (newmax <= loc);
				table = realloc(table, newmax * sizeof(short));
				if (table == NULL)
					no_space();
				check = realloc(check, newmax * sizeof(short));
				if (check == NULL)
					no_space();
				for (l  = maxtable; l < newmax; ++l) {
					table[l] = 0;
					check[l] = -1;
				}
				maxtable = newmax;
			}

			if (check[loc] != -1)
				ok = 0;
		}
		for (k = 0; ok && k < vector; k++) {
			if (pos[k] == j)
				ok = 0;
		}
		if (ok) {
			for (k = 0; k < t; k++) {
				loc = j + from[k];
				table[loc] = to[k];
				check[loc] = from[k];
				if (loc > high)
					high = loc;
			}

			while (lowzero < maxtable && check[lowzero] != -1)
				++lowzero;

			return (j);
		}
	}
}



void
output_base(void)
{
	int i, j;

	fprintf(output_file, "const short %ssindex[] =\n"
	    "\t{%39d,", symbol_prefix, base[0]);

	j = 10;
	for (i = 1; i < nstates; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", base[i]);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "};\n"
	    "const short %srindex[] =\n"
	    "\t{%39d,", symbol_prefix, base[nstates]);

	j = 10;
	for (i = nstates + 1; i < 2*nstates; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", base[i]);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "};\n"
	    "const short %sgindex[] =\n"
	    "\t{%39d,", symbol_prefix, base[2*nstates]);

	j = 10;
	for (i = 2*nstates + 1; i < nvectors - 1; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", base[i]);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
	free(base);
}


void
output_table(void)
{
	int i, j;

	++outline;
	fprintf(code_file, "#define YYTABLESIZE %d\n", high);
	fprintf(output_file, "const short %stable[] =\n"
	    "\t{%40d,", symbol_prefix, table[0]);

	j = 10;
	for (i = 1; i <= high; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", table[i]);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
	free(table);
}


void
output_check(void)
{
	int i, j;

	fprintf(output_file, "const short %scheck[] =\n"
	    "\t{%40d,", symbol_prefix, check[0]);

	j = 10;
	for (i = 1; i <= high; i++) {
		if (j >= 10) {
			if (!rflag)
				++outline;
			putc('\n', output_file);
			j = 1;
		} else
			++j;
		fprintf(output_file, "%5d,", check[i]);
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
	free(check);
}


int
is_C_identifier(char *name)
{
	char *s;
	int c;

	s = name;
	c = (unsigned char)*s;
	if (c == '"') {
		c = (unsigned char)*++s;
		if (!isalpha(c) && c != '_' && c != '$')
			return (0);
		while ((c = (unsigned char)*++s) != '"') {
			if (!isalnum(c) && c != '_' && c != '$')
				return (0);
		}
		return (1);
	}

	if (!isalpha(c) && c != '_' && c != '$')
		return (0);
	while ((c = (unsigned char)*++s)) {
		if (!isalnum(c) && c != '_' && c != '$')
			return (0);
	}
	return (1);
}


void
output_defines(void)
{
	int c, i;
	char *s;

	for (i = 2; i < ntokens; ++i) {
		s = symbol_name[i];
		if (is_C_identifier(s)) {
			fprintf(code_file, "#define ");
			if (dflag)
				fprintf(defines_file, "#define ");
			c = (unsigned char)*s;
			if (c == '"') {
				while ((c = (unsigned char)*++s) != '"') {
					putc(c, code_file);
					if (dflag)
						putc(c, defines_file);
				}
			} else {
				do {
					putc(c, code_file);
					if (dflag)
						putc(c, defines_file);
				} while ((c = (unsigned char)*++s));
			}
			++outline;
			fprintf(code_file, " %d\n", symbol_value[i]);
			if (dflag)
				fprintf(defines_file, " %d\n", symbol_value[i]);
		}
	}

	++outline;
	fprintf(code_file, "#define YYERRCODE %d\n", symbol_value[1]);

	if (dflag && unionized) {
		rewind(union_file);
		while ((c = getc(union_file)) != EOF)
			putc(c, defines_file);
		fprintf(defines_file, " YYSTYPE;\n");
		fprintf(defines_file, "#endif /* YYSTYPE_DEFINED */\n");
		fprintf(defines_file, "extern YYSTYPE %slval;\n",
		    symbol_prefix);
	}
}


void
output_stored_text(void)
{
	int c;
	FILE *in, *out;

	rewind(text_file);
	in = text_file;
	if ((c = getc(in)) == EOF)
		return;
	out = code_file;
	if (c ==  '\n')
		++outline;
	putc(c, out);
	while ((c = getc(in)) != EOF) {
		if (c == '\n')
			++outline;
		putc(c, out);
	}
	if (!lflag)
		fprintf(out, line_format, ++outline + 1, code_file_name);
}


void
output_debug(void)
{
	int i, j, k, max;
	char **symnam, *s;

	++outline;
	fprintf(code_file, "#define YYFINAL %d\n", final_state);
	outline += 3;
	fprintf(code_file, "#ifndef YYDEBUG\n#define YYDEBUG %d\n#endif\n",
		tflag);
	if (rflag)
		fprintf(output_file, "#ifndef YYDEBUG\n#define YYDEBUG %d\n#endif\n",
		    tflag);

	max = 0;
	for (i = 2; i < ntokens; ++i)
		if (symbol_value[i] > max)
			max = symbol_value[i];
	++outline;
	fprintf(code_file, "#define YYMAXTOKEN %d\n", max);

	symnam = calloc(max+1, sizeof(char *));
	if (symnam == NULL)
		no_space();

	for (i = ntokens - 1; i >= 2; --i)
		symnam[symbol_value[i]] = symbol_name[i];
	symnam[0] = "end-of-file";

	if (!rflag)
		++outline;
	fprintf(output_file,
	    "#if YYDEBUG\n"
	    "const char * const %sname[] =\n"
	    "\t{", symbol_prefix);
	j = 80;
	for (i = 0; i <= max; ++i) {
		if ((s = symnam[i]) != NULL) {
			if (s[0] == '"') {
				k = 7;
				while (*++s != '"') {
					++k;
					if (*s == '\\') {
						k += 2;
						if (*++s == '\\')
							++k;
					}
				}
				j += k;
				if (j > 80) {
					if (!rflag)
						++outline;
					putc('\n', output_file);
					j = k;
				}
				fprintf(output_file, "\"\\\"");
				s = symnam[i];
				while (*++s != '"') {
					if (*s == '\\') {
						fprintf(output_file, "\\\\");
						if (*++s == '\\')
							fprintf(output_file, "\\\\");
						else
							putc(*s, output_file);
					} else
						putc(*s, output_file);
				}
				fprintf(output_file, "\\\"\",");
			} else if (s[0] == '\'') {
				if (s[1] == '"') {
					j += 7;
					if (j > 80) {
						if (!rflag)
							++outline;
						putc('\n', output_file);
						j = 7;
					}
					fprintf(output_file, "\"'\\\"'\",");
				} else {
					k = 5;
					while (*++s != '\'') {
						++k;
						if (*s == '\\') {
							k += 2;
							if (*++s == '\\')
								++k;
						}
					}
					j += k;
					if (j > 80) {
						if (!rflag)
							++outline;
						putc('\n', output_file);
						j = k;
					}
					fprintf(output_file, "\"'");
					s = symnam[i];
					while (*++s != '\'') {
						if (*s == '\\') {
							fprintf(output_file, "\\\\");
							if (*++s == '\\')
								fprintf(output_file, "\\\\");
							else
								putc(*s, output_file);
						} else
							putc(*s, output_file);
					}
					fprintf(output_file, "'\",");
				}
			} else {
				k = strlen(s) + 3;
				j += k;
				if (j > 80) {
					if (!rflag)
						++outline;
					putc('\n', output_file);
					j = k;
				}
				putc('"', output_file);
				do {
					putc(*s, output_file);
				} while (*++s);
				fprintf(output_file, "\",");
			}
		} else {
			j += 2;
			if (j > 80) {
				if (!rflag)
					++outline;
				putc('\n', output_file);
				j = 2;
			}
			fprintf(output_file, "0,");
		}
	}
	if (!rflag)
		outline += 2;
	fprintf(output_file, "\n};\n");
	free(symnam);

	if (!rflag)
		++outline;
	fprintf(output_file,
	    "const char * const %srule[] =\n"
	    "\t{", symbol_prefix);
	for (i = 2; i < nrules; ++i) {
		fprintf(output_file, "\"%s :", symbol_name[rlhs[i]]);
		for (j = rrhs[i]; ritem[j] > 0; ++j) {
			s = symbol_name[ritem[j]];
			if (s[0] == '"') {
				fprintf(output_file, " \\\"");
				while (*++s != '"') {
					if (*s == '\\') {
						if (s[1] == '\\')
							fprintf(output_file, "\\\\\\\\");
						else
							fprintf(output_file, "\\\\%c", s[1]);
						++s;
					} else
						putc(*s, output_file);
				}
				fprintf(output_file, "\\\"");
			} else if (s[0] == '\'') {
				if (s[1] == '"')
					fprintf(output_file, " '\\\"'");
				else if (s[1] == '\\') {
					if (s[2] == '\\')
						fprintf(output_file, " '\\\\\\\\");
					else
						fprintf(output_file, " '\\\\%c", s[2]);
					s += 2;
					while (*++s != '\'')
						putc(*s, output_file);
					putc('\'', output_file);
				} else
					fprintf(output_file, " '%c'", s[1]);
			} else
				fprintf(output_file, " %s", s);
		}
		if (!rflag)
			++outline;
		fprintf(output_file, "\",\n");
	}

	if (!rflag)
		outline += 2;
	fprintf(output_file, "};\n#endif\n");
}


void
output_stype(void)
{
	if (!unionized && ntags == 0) {
		outline += 3;
		fprintf(code_file, "#ifndef YYSTYPE\ntypedef int YYSTYPE;\n#endif\n");
	}
}


void
output_trailing_text(void)
{
	int c, last;
	FILE *in, *out;

	if (line == 0)
		return;

	in = input_file;
	out = code_file;
	c = (unsigned char)*cptr;
	if (c == '\n') {
		++lineno;
		if ((c = getc(in)) == EOF)
			return;
		if (!lflag) {
			++outline;
			fprintf(out, line_format, lineno, input_file_name);
		}
		if (c == '\n')
			++outline;
		putc(c, out);
		last = c;
	} else {
		if (!lflag) {
			++outline;
			fprintf(out, line_format, lineno, input_file_name);
		}
		do {
			putc(c, out);
		} while ((c = (unsigned char)*++cptr) != '\n');
		++outline;
		putc('\n', out);
		last = '\n';
	}

	while ((c = getc(in)) != EOF) {
		if (c == '\n')
			++outline;
		putc(c, out);
		last = c;
	}

	if (last != '\n') {
		++outline;
		putc('\n', out);
	}
	if (!lflag)
		fprintf(out, line_format, ++outline + 1, code_file_name);
}


void
output_semantic_actions(void)
{
	int c, last;
	FILE *out;

	rewind(action_file);

	if ((c = getc(action_file)) == EOF)
		return;

	out = code_file;
	last = c;
	if (c == '\n')
		++outline;
	putc(c, out);
	while ((c = getc(action_file)) != EOF) {
		if (c == '\n')
			++outline;
		putc(c, out);
		last = c;
	}

	if (last != '\n') {
		++outline;
		putc('\n', out);
	}

	if (!lflag)
		fprintf(out, line_format, ++outline + 1, code_file_name);
}


void
free_itemsets(void)
{
	core *cp, *next;

	free(state_table);
	for (cp = first_state; cp; cp = next) {
		next = cp->next;
		free(cp);
	}
}


void
free_shifts(void)
{
	shifts *sp, *next;

	free(shift_table);
	for (sp = first_shift; sp; sp = next) {
		next = sp->next;
		free(sp);
	}
}



void
free_reductions(void)
{
	reductions *rp, *next;

	free(reduction_table);
	for (rp = first_reduction; rp; rp = next) {
		next = rp->next;
		free(rp);
	}
}