xref: /illumos-gate/usr/src/cmd/diff/diffh.c (revision 78eb75ca)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate 
237c478bd9Sstevel@tonic-gate /*
24*78eb75caSchin  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
257c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
267c478bd9Sstevel@tonic-gate  */
277c478bd9Sstevel@tonic-gate 
28*78eb75caSchin /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
29*78eb75caSchin /*	  All Rights Reserved  	*/
30*78eb75caSchin 
317c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
327c478bd9Sstevel@tonic-gate 
337c478bd9Sstevel@tonic-gate #include <stdio.h>
347c478bd9Sstevel@tonic-gate #include <stdlib.h>
357c478bd9Sstevel@tonic-gate #include <unistd.h>
367c478bd9Sstevel@tonic-gate #include <ctype.h>
377c478bd9Sstevel@tonic-gate #include <locale.h>
387c478bd9Sstevel@tonic-gate #include <sys/types.h>
397c478bd9Sstevel@tonic-gate #include <sys/stat.h>
407c478bd9Sstevel@tonic-gate #include <limits.h>
417c478bd9Sstevel@tonic-gate #include <stdarg.h>
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate #define	C		3
447c478bd9Sstevel@tonic-gate #define	RANGE		30
457c478bd9Sstevel@tonic-gate #define	LEN		255
467c478bd9Sstevel@tonic-gate #define	INF		16384
477c478bd9Sstevel@tonic-gate 
487c478bd9Sstevel@tonic-gate char *text[2][RANGE];
497c478bd9Sstevel@tonic-gate long lineno[2] = {1, 1};	/* no. of 1st stored line in each file */
507c478bd9Sstevel@tonic-gate int ntext[2];		/* number of stored lines in each */
517c478bd9Sstevel@tonic-gate long n0, n1;		/* scan pointer in each */
527c478bd9Sstevel@tonic-gate int bflag;
537c478bd9Sstevel@tonic-gate int debug = 0;
547c478bd9Sstevel@tonic-gate FILE *file[2];
557c478bd9Sstevel@tonic-gate static int diffFound = 0;
567c478bd9Sstevel@tonic-gate 
577c478bd9Sstevel@tonic-gate static char *getl(int f, long n);
587c478bd9Sstevel@tonic-gate static void clrl(int f, long n);
597c478bd9Sstevel@tonic-gate static void movstr(char *s, char *t);
607c478bd9Sstevel@tonic-gate static int easysynch(void);
617c478bd9Sstevel@tonic-gate static int output(int a, int b);
627c478bd9Sstevel@tonic-gate static void change(long a, int b, long c, int d, char *s);
637c478bd9Sstevel@tonic-gate static void range(long a, int b);
647c478bd9Sstevel@tonic-gate static int cmp(char *s, char *t);
657c478bd9Sstevel@tonic-gate static FILE *dopen(char *f1, char *f2);
667c478bd9Sstevel@tonic-gate static void progerr(char *s);
677c478bd9Sstevel@tonic-gate static void error(char *err, ...);
687c478bd9Sstevel@tonic-gate static int hardsynch(void);
697c478bd9Sstevel@tonic-gate 
707c478bd9Sstevel@tonic-gate 	/* return pointer to line n of file f */
717c478bd9Sstevel@tonic-gate static char *
getl(int f,long n)727c478bd9Sstevel@tonic-gate getl(int f, long n)
737c478bd9Sstevel@tonic-gate {
747c478bd9Sstevel@tonic-gate 	char *t;
757c478bd9Sstevel@tonic-gate 	int delta, nt;
767c478bd9Sstevel@tonic-gate 
777c478bd9Sstevel@tonic-gate again:
787c478bd9Sstevel@tonic-gate 	delta = n - lineno[f];
797c478bd9Sstevel@tonic-gate 	nt = ntext[f];
807c478bd9Sstevel@tonic-gate 	if (delta < 0)
817c478bd9Sstevel@tonic-gate 		progerr("1");
827c478bd9Sstevel@tonic-gate 	if (delta < nt)
837c478bd9Sstevel@tonic-gate 		return (text[f][delta]);
847c478bd9Sstevel@tonic-gate 	if (delta > nt)
857c478bd9Sstevel@tonic-gate 		progerr("2");
867c478bd9Sstevel@tonic-gate 	if (nt >= RANGE)
877c478bd9Sstevel@tonic-gate 		progerr("3");
887c478bd9Sstevel@tonic-gate 	if (feof(file[f]))
897c478bd9Sstevel@tonic-gate 		return (NULL);
907c478bd9Sstevel@tonic-gate 	t = text[f][nt];
917c478bd9Sstevel@tonic-gate 	if (t == 0) {
927c478bd9Sstevel@tonic-gate 		t = text[f][nt] = (char *)malloc(LEN+1);
937c478bd9Sstevel@tonic-gate 		if (t == NULL)
947c478bd9Sstevel@tonic-gate 			if (hardsynch())
957c478bd9Sstevel@tonic-gate 				goto again;
967c478bd9Sstevel@tonic-gate 			else
977c478bd9Sstevel@tonic-gate 				progerr("5");
987c478bd9Sstevel@tonic-gate 	}
997c478bd9Sstevel@tonic-gate 	t = fgets(t, LEN, file[f]);
1007c478bd9Sstevel@tonic-gate 	if (t != NULL)
1017c478bd9Sstevel@tonic-gate 		ntext[f]++;
1027c478bd9Sstevel@tonic-gate 	return (t);
1037c478bd9Sstevel@tonic-gate }
1047c478bd9Sstevel@tonic-gate 
1057c478bd9Sstevel@tonic-gate 	/* remove thru line n of file f from storage */
1067c478bd9Sstevel@tonic-gate static void
clrl(int f,long n)1077c478bd9Sstevel@tonic-gate clrl(int f, long n)
1087c478bd9Sstevel@tonic-gate {
1097c478bd9Sstevel@tonic-gate 	int i, j;
1107c478bd9Sstevel@tonic-gate 
1117c478bd9Sstevel@tonic-gate 	j = n-lineno[f]+1;
1127c478bd9Sstevel@tonic-gate 	for (i = 0; i+j < ntext[f]; i++)
1137c478bd9Sstevel@tonic-gate 		movstr(text[f][i+j], text[f][i]);
1147c478bd9Sstevel@tonic-gate 	lineno[f] = n+1;
1157c478bd9Sstevel@tonic-gate 	ntext[f] -= j;
1167c478bd9Sstevel@tonic-gate }
1177c478bd9Sstevel@tonic-gate 
1187c478bd9Sstevel@tonic-gate static void
movstr(char * s,char * t)1197c478bd9Sstevel@tonic-gate movstr(char *s, char *t)
1207c478bd9Sstevel@tonic-gate {
1217c478bd9Sstevel@tonic-gate 	while (*t++ = *s++)
1227c478bd9Sstevel@tonic-gate 		continue;
1237c478bd9Sstevel@tonic-gate }
1247c478bd9Sstevel@tonic-gate 
1257c478bd9Sstevel@tonic-gate int
main(int argc,char ** argv)1267c478bd9Sstevel@tonic-gate main(int argc, char **argv)
1277c478bd9Sstevel@tonic-gate {
1287c478bd9Sstevel@tonic-gate 	char *s0, *s1;
1297c478bd9Sstevel@tonic-gate 
1307c478bd9Sstevel@tonic-gate 	if ((argc > 1) && (*argv[1] == '-')) {
1317c478bd9Sstevel@tonic-gate 		argc--;
1327c478bd9Sstevel@tonic-gate 		argv++;
1337c478bd9Sstevel@tonic-gate 		while (*++argv[0])
1347c478bd9Sstevel@tonic-gate 			if (*argv[0] == 'b')
1357c478bd9Sstevel@tonic-gate 				bflag++;
1367c478bd9Sstevel@tonic-gate 	}
1377c478bd9Sstevel@tonic-gate 
1387c478bd9Sstevel@tonic-gate 	(void) setlocale(LC_ALL, "");
1397c478bd9Sstevel@tonic-gate #if !defined(TEXT_DOMAIN)		/* Should be defined by cc -D */
1407c478bd9Sstevel@tonic-gate #define	TEXT_DOMAIN	"SYS_TEST"	/* Use this only if it weren't */
1417c478bd9Sstevel@tonic-gate #endif
1427c478bd9Sstevel@tonic-gate 	(void) textdomain(TEXT_DOMAIN);
1437c478bd9Sstevel@tonic-gate 
1447c478bd9Sstevel@tonic-gate 	if (argc != 3)
1457c478bd9Sstevel@tonic-gate 		error(gettext("must have 2 file arguments"));
1467c478bd9Sstevel@tonic-gate 	file[0] = dopen(argv[1], argv[2]);
1477c478bd9Sstevel@tonic-gate 	file[1] = dopen(argv[2], argv[1]);
1487c478bd9Sstevel@tonic-gate 	for (;;) {
1497c478bd9Sstevel@tonic-gate 		s0 = getl(0, ++n0);
1507c478bd9Sstevel@tonic-gate 		s1 = getl(1, ++n1);
1517c478bd9Sstevel@tonic-gate 		if (s0 == NULL || s1 == NULL)
1527c478bd9Sstevel@tonic-gate 			break;
1537c478bd9Sstevel@tonic-gate 		if (cmp(s0, s1) != 0) {
1547c478bd9Sstevel@tonic-gate 			if (!easysynch() && !hardsynch())
1557c478bd9Sstevel@tonic-gate 				progerr("5");
1567c478bd9Sstevel@tonic-gate 		} else {
1577c478bd9Sstevel@tonic-gate 			clrl(0, n0);
1587c478bd9Sstevel@tonic-gate 			clrl(1, n1);
1597c478bd9Sstevel@tonic-gate 		}
1607c478bd9Sstevel@tonic-gate 	}
1617c478bd9Sstevel@tonic-gate 	/* diff is expected to return 1 if the files differ */
1627c478bd9Sstevel@tonic-gate 	if (s0 == NULL && s1 == NULL)
1637c478bd9Sstevel@tonic-gate 		return (diffFound);
1647c478bd9Sstevel@tonic-gate 	if (s0 == NULL) {
1657c478bd9Sstevel@tonic-gate 		(void) output(-1, INF);
1667c478bd9Sstevel@tonic-gate 		return (1);
1677c478bd9Sstevel@tonic-gate 	}
1687c478bd9Sstevel@tonic-gate 	if (s1 == NULL) {
1697c478bd9Sstevel@tonic-gate 		(void) output(INF, -1);
1707c478bd9Sstevel@tonic-gate 		return (1);
1717c478bd9Sstevel@tonic-gate 	}
1727c478bd9Sstevel@tonic-gate 	/* NOTREACHED */
173*78eb75caSchin 	return (0);
1747c478bd9Sstevel@tonic-gate }
1757c478bd9Sstevel@tonic-gate 
1767c478bd9Sstevel@tonic-gate 	/* synch on C successive matches */
1777c478bd9Sstevel@tonic-gate static int
easysynch()1787c478bd9Sstevel@tonic-gate easysynch()
1797c478bd9Sstevel@tonic-gate {
1807c478bd9Sstevel@tonic-gate 	int i, j;
1817c478bd9Sstevel@tonic-gate 	int k, m;
1827c478bd9Sstevel@tonic-gate 	char *s0, *s1;
1837c478bd9Sstevel@tonic-gate 
1847c478bd9Sstevel@tonic-gate 	for (i = j = 1; i < RANGE && j < RANGE; i++, j++) {
1857c478bd9Sstevel@tonic-gate 		s0 = getl(0, n0+i);
1867c478bd9Sstevel@tonic-gate 		if (s0 == NULL)
1877c478bd9Sstevel@tonic-gate 			return (output(INF, INF));
1887c478bd9Sstevel@tonic-gate 		for (k = C-1; k < j; k++) {
1897c478bd9Sstevel@tonic-gate 			for (m = 0; m < C; m++)
1907c478bd9Sstevel@tonic-gate 				if (cmp(getl(0, n0+i-m),
1917c478bd9Sstevel@tonic-gate 					getl(1, n1+k-m)) != 0)
1927c478bd9Sstevel@tonic-gate 					goto cont1;
1937c478bd9Sstevel@tonic-gate 			return (output(i-C, k-C));
1947c478bd9Sstevel@tonic-gate cont1:
1957c478bd9Sstevel@tonic-gate 			;
1967c478bd9Sstevel@tonic-gate 		}
1977c478bd9Sstevel@tonic-gate 		s1 = getl(1, n1+j);
1987c478bd9Sstevel@tonic-gate 		if (s1 == NULL)
1997c478bd9Sstevel@tonic-gate 			return (output(INF, INF));
2007c478bd9Sstevel@tonic-gate 		for (k = C-1; k <= i; k++) {
2017c478bd9Sstevel@tonic-gate 			for (m = 0; m < C; m++)
2027c478bd9Sstevel@tonic-gate 				if (cmp(getl(0, n0+k-m),
2037c478bd9Sstevel@tonic-gate 					getl(1, n1+j-m)) != 0)
2047c478bd9Sstevel@tonic-gate 					goto cont2;
2057c478bd9Sstevel@tonic-gate 			return (output(k-C, j-C));
2067c478bd9Sstevel@tonic-gate cont2:
2077c478bd9Sstevel@tonic-gate 			;
2087c478bd9Sstevel@tonic-gate 		}
2097c478bd9Sstevel@tonic-gate 	}
2107c478bd9Sstevel@tonic-gate 	return (0);
2117c478bd9Sstevel@tonic-gate }
2127c478bd9Sstevel@tonic-gate 
2137c478bd9Sstevel@tonic-gate static int
output(int a,int b)2147c478bd9Sstevel@tonic-gate output(int a, int b)
2157c478bd9Sstevel@tonic-gate {
2167c478bd9Sstevel@tonic-gate 	int i;
2177c478bd9Sstevel@tonic-gate 	char *s;
2187c478bd9Sstevel@tonic-gate 
2197c478bd9Sstevel@tonic-gate 	if (a < 0)
2207c478bd9Sstevel@tonic-gate 		change(n0-1, 0, n1, b, "a");
2217c478bd9Sstevel@tonic-gate 	else if (b < 0)
2227c478bd9Sstevel@tonic-gate 		change(n0, a, n1-1, 0, "d");
2237c478bd9Sstevel@tonic-gate 	else
2247c478bd9Sstevel@tonic-gate 		change(n0, a, n1, b, "c");
2257c478bd9Sstevel@tonic-gate 	for (i = 0; i <= a; i++) {
2267c478bd9Sstevel@tonic-gate 		s = getl(0, n0+i);
2277c478bd9Sstevel@tonic-gate 		if (s == NULL)
2287c478bd9Sstevel@tonic-gate 			break;
2297c478bd9Sstevel@tonic-gate 		(void) printf("< %s", s);
2307c478bd9Sstevel@tonic-gate 		clrl(0, n0+i);
2317c478bd9Sstevel@tonic-gate 	}
2327c478bd9Sstevel@tonic-gate 	n0 += i-1;
2337c478bd9Sstevel@tonic-gate 	if (a >= 0 && b >= 0)
2347c478bd9Sstevel@tonic-gate 		(void) printf("---\n");
2357c478bd9Sstevel@tonic-gate 	for (i = 0; i <= b; i++) {
2367c478bd9Sstevel@tonic-gate 		s = getl(1, n1+i);
2377c478bd9Sstevel@tonic-gate 		if (s == NULL)
2387c478bd9Sstevel@tonic-gate 			break;
2397c478bd9Sstevel@tonic-gate 		(void) printf("> %s", s);
2407c478bd9Sstevel@tonic-gate 		clrl(1, n1+i);
2417c478bd9Sstevel@tonic-gate 	}
2427c478bd9Sstevel@tonic-gate 	diffFound = 1;
2437c478bd9Sstevel@tonic-gate 	n1 += i-1;
2447c478bd9Sstevel@tonic-gate 	return (1);
2457c478bd9Sstevel@tonic-gate }
2467c478bd9Sstevel@tonic-gate 
2477c478bd9Sstevel@tonic-gate static void
change(long a,int b,long c,int d,char * s)2487c478bd9Sstevel@tonic-gate change(long a, int b, long c, int d, char *s)
2497c478bd9Sstevel@tonic-gate {
2507c478bd9Sstevel@tonic-gate 	range(a, b);
2517c478bd9Sstevel@tonic-gate 	(void) printf("%s", s);
2527c478bd9Sstevel@tonic-gate 	range(c, d);
2537c478bd9Sstevel@tonic-gate 	(void) printf("\n");
2547c478bd9Sstevel@tonic-gate }
2557c478bd9Sstevel@tonic-gate 
2567c478bd9Sstevel@tonic-gate static void
range(long a,int b)2577c478bd9Sstevel@tonic-gate range(long a, int b)
2587c478bd9Sstevel@tonic-gate {
2597c478bd9Sstevel@tonic-gate 	if (b == INF)
2607c478bd9Sstevel@tonic-gate 		(void) printf("%ld,$", a);
2617c478bd9Sstevel@tonic-gate 	else if (b == 0)
2627c478bd9Sstevel@tonic-gate 		(void) printf("%ld", a);
2637c478bd9Sstevel@tonic-gate 	else
2647c478bd9Sstevel@tonic-gate 		(void) printf("%ld,%ld", a, a+b);
2657c478bd9Sstevel@tonic-gate }
2667c478bd9Sstevel@tonic-gate 
2677c478bd9Sstevel@tonic-gate static int
cmp(char * s,char * t)2687c478bd9Sstevel@tonic-gate cmp(char *s, char *t)
2697c478bd9Sstevel@tonic-gate {
2707c478bd9Sstevel@tonic-gate 	if (debug)
2717c478bd9Sstevel@tonic-gate 		(void) printf("%s:%s\n", s, t);
2727c478bd9Sstevel@tonic-gate 	for (;;) {
2737c478bd9Sstevel@tonic-gate 		if (bflag && isspace(*s) && isspace(*t)) {
2747c478bd9Sstevel@tonic-gate 			while (isspace(*++s))
2757c478bd9Sstevel@tonic-gate 				;
2767c478bd9Sstevel@tonic-gate 			while (isspace(*++t))
2777c478bd9Sstevel@tonic-gate 				;
2787c478bd9Sstevel@tonic-gate 		}
2797c478bd9Sstevel@tonic-gate 		if (*s != *t || *s == 0)
2807c478bd9Sstevel@tonic-gate 			break;
2817c478bd9Sstevel@tonic-gate 		s++;
2827c478bd9Sstevel@tonic-gate 		t++;
2837c478bd9Sstevel@tonic-gate 	}
2847c478bd9Sstevel@tonic-gate 	return (*s-*t);
2857c478bd9Sstevel@tonic-gate }
2867c478bd9Sstevel@tonic-gate 
2877c478bd9Sstevel@tonic-gate static FILE *
dopen(char * f1,char * f2)2887c478bd9Sstevel@tonic-gate dopen(char *f1, char *f2)
2897c478bd9Sstevel@tonic-gate {
2907c478bd9Sstevel@tonic-gate 	FILE *f;
2917c478bd9Sstevel@tonic-gate 	char b[PATH_MAX], *bptr, *eptr;
2927c478bd9Sstevel@tonic-gate 	struct stat statbuf;
2937c478bd9Sstevel@tonic-gate 
2947c478bd9Sstevel@tonic-gate 	if (cmp(f1, "-") == 0) {
2957c478bd9Sstevel@tonic-gate 		if (cmp(f2, "-") == 0)
2967c478bd9Sstevel@tonic-gate 			error(gettext("can't do - -"));
2977c478bd9Sstevel@tonic-gate 		else {
2987c478bd9Sstevel@tonic-gate 			if (fstat(fileno(stdin), &statbuf) == -1)
2997c478bd9Sstevel@tonic-gate 				error(gettext("can't access stdin"));
3007c478bd9Sstevel@tonic-gate 			else
3017c478bd9Sstevel@tonic-gate 				return (stdin);
3027c478bd9Sstevel@tonic-gate 		}
3037c478bd9Sstevel@tonic-gate 	}
3047c478bd9Sstevel@tonic-gate 	if (stat(f1, &statbuf) == -1)
3057c478bd9Sstevel@tonic-gate 		error(gettext("can't access %s"), f1);
3067c478bd9Sstevel@tonic-gate 	if ((statbuf.st_mode & S_IFMT) == S_IFDIR) {
3077c478bd9Sstevel@tonic-gate 		for (bptr = b; *bptr = *f1++; bptr++)
3087c478bd9Sstevel@tonic-gate 			;
3097c478bd9Sstevel@tonic-gate 		*bptr++ = '/';
3107c478bd9Sstevel@tonic-gate 		for (eptr = f2; *eptr; eptr++)
3117c478bd9Sstevel@tonic-gate 			if (*eptr == '/' && eptr[1] != 0 && eptr[1] != '/')
3127c478bd9Sstevel@tonic-gate 				f2 = eptr+1;
3137c478bd9Sstevel@tonic-gate 		while (*bptr++ = *f2++)
3147c478bd9Sstevel@tonic-gate 			;
3157c478bd9Sstevel@tonic-gate 		f1 = b;
3167c478bd9Sstevel@tonic-gate 	}
3177c478bd9Sstevel@tonic-gate 	f = fopen(f1, "r");
3187c478bd9Sstevel@tonic-gate 	if (f == NULL)
3197c478bd9Sstevel@tonic-gate 		error(gettext("can't open %s"), f1);
3207c478bd9Sstevel@tonic-gate 	return (f);
3217c478bd9Sstevel@tonic-gate }
3227c478bd9Sstevel@tonic-gate 
3237c478bd9Sstevel@tonic-gate 
3247c478bd9Sstevel@tonic-gate static void
progerr(char * s)3257c478bd9Sstevel@tonic-gate progerr(char *s)
3267c478bd9Sstevel@tonic-gate {
3277c478bd9Sstevel@tonic-gate 	error(gettext("program error %s"), s);
3287c478bd9Sstevel@tonic-gate }
3297c478bd9Sstevel@tonic-gate 
3307c478bd9Sstevel@tonic-gate static void
error(char * err,...)3317c478bd9Sstevel@tonic-gate error(char *err, ...)
3327c478bd9Sstevel@tonic-gate {
3337c478bd9Sstevel@tonic-gate 	va_list	ap;
3347c478bd9Sstevel@tonic-gate 
3357c478bd9Sstevel@tonic-gate 	va_start(ap, err);
3367c478bd9Sstevel@tonic-gate 	(void) fprintf(stderr, "diffh: ");
3377c478bd9Sstevel@tonic-gate 	(void) vfprintf(stderr, err, ap);
3387c478bd9Sstevel@tonic-gate 	(void) fprintf(stderr, "\n");
3397c478bd9Sstevel@tonic-gate 	va_end(ap);
3407c478bd9Sstevel@tonic-gate 	exit(2);
3417c478bd9Sstevel@tonic-gate }
3427c478bd9Sstevel@tonic-gate 
3437c478bd9Sstevel@tonic-gate 	/* stub for resychronization beyond limits of text buf */
3447c478bd9Sstevel@tonic-gate static int
hardsynch()3457c478bd9Sstevel@tonic-gate hardsynch()
3467c478bd9Sstevel@tonic-gate {
3477c478bd9Sstevel@tonic-gate 	change(n0, INF, n1, INF, "c");
3487c478bd9Sstevel@tonic-gate 	(void) printf(gettext("---change record omitted\n"));
3497c478bd9Sstevel@tonic-gate 	error(gettext("can't resynchronize"));
3507c478bd9Sstevel@tonic-gate 	return (0);
3517c478bd9Sstevel@tonic-gate }
352