tr.c revision 1590 
1/*
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1988, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)tr.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44#include <sys/types.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include "extern.h"
49
50static int string1[NCHARS] = {
51	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,		/* ASCII */
52	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
53	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
54	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
55	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
56	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
57	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
58	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
59	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
60	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
61	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
62	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
63	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
64	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
65	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
66	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
67	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
68	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
69	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
70	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
71	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
72	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
73	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
74	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
75	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
76	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
77	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
78	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
79	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
80	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
81	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
82	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
83}, string2[NCHARS];
84
85STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
86STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
87
88static void setup __P((int *, char *, STR *, int));
89static void usage __P((void));
90
91int
92main(argc, argv)
93	int argc;
94	char **argv;
95{
96	register int ch, cnt, lastch, *p;
97	int cflag, dflag, sflag, isstring2;
98
99	cflag = dflag = sflag = 0;
100	while ((ch = getopt(argc, argv, "cds")) != EOF)
101		switch((char)ch) {
102		case 'c':
103			cflag = 1;
104			break;
105		case 'd':
106			dflag = 1;
107			break;
108		case 's':
109			sflag = 1;
110			break;
111		case '?':
112		default:
113			usage();
114		}
115	argc -= optind;
116	argv += optind;
117
118	switch(argc) {
119	case 0:
120	default:
121		usage();
122		/* NOTREACHED */
123	case 1:
124		isstring2 = 0;
125		break;
126	case 2:
127		isstring2 = 1;
128		break;
129	}
130
131	/*
132	 * tr -ds [-c] string1 string2
133	 * Delete all characters (or complemented characters) in string1.
134	 * Squeeze all characters in string2.
135	 */
136	if (dflag && sflag) {
137		if (!isstring2)
138			usage();
139
140		setup(string1, argv[0], &s1, cflag);
141		setup(string2, argv[1], &s2, 0);
142
143		for (lastch = OOBCH; (ch = getchar()) != EOF;)
144			if (!string1[ch] && (!string2[ch] || lastch != ch)) {
145				lastch = ch;
146				(void)putchar(ch);
147			}
148		exit(0);
149	}
150
151	/*
152	 * tr -d [-c] string1
153	 * Delete all characters (or complemented characters) in string1.
154	 */
155	if (dflag) {
156		if (isstring2)
157			usage();
158
159		setup(string1, argv[0], &s1, cflag);
160
161		while ((ch = getchar()) != EOF)
162			if (!string1[ch])
163				(void)putchar(ch);
164		exit(0);
165	}
166
167	/*
168	 * tr -s [-c] string1
169	 * Squeeze all characters (or complemented characters) in string1.
170	 */
171	if (sflag && !isstring2) {
172		setup(string1, argv[0], &s1, cflag);
173
174		for (lastch = OOBCH; (ch = getchar()) != EOF;)
175			if (!string1[ch] || lastch != ch) {
176				lastch = ch;
177				(void)putchar(ch);
178			}
179		exit(0);
180	}
181
182	/*
183	 * tr [-cs] string1 string2
184	 * Replace all characters (or complemented characters) in string1 with
185	 * the character in the same position in string2.  If the -s option is
186	 * specified, squeeze all the characters in string2.
187	 */
188	if (!isstring2)
189		usage();
190
191	s1.str = argv[0];
192	s2.str = argv[1];
193
194	if (cflag)
195		for (cnt = NCHARS, p = string1; cnt--;)
196			*p++ = OOBCH;
197
198	if (!next(&s2))
199		err("empty string2");
200
201	/* If string2 runs out of characters, use the last one specified. */
202	if (sflag)
203		while (next(&s1)) {
204			string1[s1.lastch] = ch = s2.lastch;
205			string2[ch] = 1;
206			(void)next(&s2);
207		}
208	else
209		while (next(&s1)) {
210			string1[s1.lastch] = ch = s2.lastch;
211			(void)next(&s2);
212		}
213
214	if (cflag)
215		for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
216			*p = *p == OOBCH ? ch : cnt;
217
218	if (sflag)
219		for (lastch = OOBCH; (ch = getchar()) != EOF;) {
220			ch = string1[ch];
221			if (!string2[ch] || lastch != ch) {
222				lastch = ch;
223				(void)putchar(ch);
224			}
225		}
226	else
227		while ((ch = getchar()) != EOF)
228			(void)putchar(string1[ch]);
229	exit (0);
230}
231
232static void
233setup(string, arg, str, cflag)
234	int *string;
235	char *arg;
236	STR *str;
237	int cflag;
238{
239	register int cnt, *p;
240
241	str->str = arg;
242	bzero(string, NCHARS * sizeof(int));
243	while (next(str))
244		string[str->lastch] = 1;
245	if (cflag)
246		for (p = string, cnt = NCHARS; cnt--; ++p)
247			*p = !*p;
248}
249
250static void
251usage()
252{
253	(void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
254	(void)fprintf(stderr, "       tr [-c] -d string1\n");
255	(void)fprintf(stderr, "       tr [-c] -s string1\n");
256	(void)fprintf(stderr, "       tr [-c] -ds string1 string2\n");
257	exit(1);
258}
259
260#if __STDC__
261#include <stdarg.h>
262#else
263#include <varargs.h>
264#endif
265
266void
267#if __STDC__
268err(const char *fmt, ...)
269#else
270err(fmt, va_alist)
271	char *fmt;
272        va_dcl
273#endif
274{
275	va_list ap;
276#if __STDC__
277	va_start(ap, fmt);
278#else
279	va_start(ap);
280#endif
281	(void)fprintf(stderr, "tr: ");
282	(void)vfprintf(stderr, fmt, ap);
283	va_end(ap);
284	(void)fprintf(stderr, "\n");
285	exit(1);
286	/* NOTREACHED */
287}
288