tr.c revision 87705 
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#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/tr/tr.c 87705 2001-12-11 23:36:25Z markm $");
37
38#ifndef lint
39static const char copyright[] =
40"@(#) Copyright (c) 1988, 1993\n\
41	The Regents of the University of California.  All rights reserved.\n";
42#endif
43
44#ifndef lint
45static const char sccsid[] = "@(#)tr.c	8.2 (Berkeley) 5/4/95";
46#endif
47
48#include <sys/types.h>
49
50#include <err.h>
51#include <locale.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57#include "extern.h"
58
59static int string1[NCHARS] = {
60	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,		/* ASCII */
61	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
62	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
63	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
64	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
65	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
66	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
67	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
68	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
69	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
70	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
71	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
72	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
73	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
74	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
75	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
76	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
77	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
78	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
79	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
80	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
81	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
82	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
83	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
84	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
85	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
86	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
87	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
88	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
89	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
90	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
91	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
92}, string2[NCHARS];
93
94STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
95STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
96
97static void setup __P((int *, char *, STR *, int));
98static void usage __P((void));
99
100int
101main(argc, argv)
102	int argc;
103	char **argv;
104{
105	int ch, cnt, lastch, *p;
106	int cflag, dflag, sflag, isstring2;
107
108	(void) setlocale(LC_CTYPE, "");
109
110	cflag = dflag = sflag = 0;
111	while ((ch = getopt(argc, argv, "cdsu")) != -1)
112		switch((char)ch) {
113		case 'c':
114			cflag = 1;
115			break;
116		case 'd':
117			dflag = 1;
118			break;
119		case 's':
120			sflag = 1;
121			break;
122		case 'u':
123			setbuf(stdout, (char *)NULL);
124			break;
125		case '?':
126		default:
127			usage();
128		}
129	argc -= optind;
130	argv += optind;
131
132	switch(argc) {
133	case 0:
134	default:
135		usage();
136		/* NOTREACHED */
137	case 1:
138		isstring2 = 0;
139		break;
140	case 2:
141		isstring2 = 1;
142		break;
143	}
144
145	/*
146	 * tr -ds [-c] string1 string2
147	 * Delete all characters (or complemented characters) in string1.
148	 * Squeeze all characters in string2.
149	 */
150	if (dflag && sflag) {
151		if (!isstring2)
152			usage();
153
154		setup(string1, argv[0], &s1, cflag);
155		setup(string2, argv[1], &s2, 0);
156
157		for (lastch = OOBCH; (ch = getchar()) != EOF;)
158			if (!string1[ch] && (!string2[ch] || lastch != ch)) {
159				lastch = ch;
160				(void)putchar(ch);
161			}
162		exit(0);
163	}
164
165	/*
166	 * tr -d [-c] string1
167	 * Delete all characters (or complemented characters) in string1.
168	 */
169	if (dflag) {
170		if (isstring2)
171			usage();
172
173		setup(string1, argv[0], &s1, cflag);
174
175		while ((ch = getchar()) != EOF)
176			if (!string1[ch])
177				(void)putchar(ch);
178		exit(0);
179	}
180
181	/*
182	 * tr -s [-c] string1
183	 * Squeeze all characters (or complemented characters) in string1.
184	 */
185	if (sflag && !isstring2) {
186		setup(string1, argv[0], &s1, cflag);
187
188		for (lastch = OOBCH; (ch = getchar()) != EOF;)
189			if (!string1[ch] || lastch != ch) {
190				lastch = ch;
191				(void)putchar(ch);
192			}
193		exit(0);
194	}
195
196	/*
197	 * tr [-cs] string1 string2
198	 * Replace all characters (or complemented characters) in string1 with
199	 * the character in the same position in string2.  If the -s option is
200	 * specified, squeeze all the characters in string2.
201	 */
202	if (!isstring2)
203		usage();
204
205	s1.str = argv[0];
206	s2.str = argv[1];
207
208	if (cflag)
209		for (cnt = NCHARS, p = string1; cnt--;)
210			*p++ = OOBCH;
211
212	if (!next(&s2))
213		errx(1, "empty string2");
214
215	/* If string2 runs out of characters, use the last one specified. */
216	if (sflag)
217		while (next(&s1)) {
218			string1[s1.lastch] = ch = s2.lastch;
219			string2[ch] = 1;
220			(void)next(&s2);
221		}
222	else
223		while (next(&s1)) {
224			string1[s1.lastch] = ch = s2.lastch;
225			(void)next(&s2);
226		}
227
228	if (cflag)
229		for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
230			*p = *p == OOBCH ? ch : cnt;
231
232	if (sflag)
233		for (lastch = OOBCH; (ch = getchar()) != EOF;) {
234			ch = string1[ch];
235			if (!string2[ch] || lastch != ch) {
236				lastch = ch;
237				(void)putchar(ch);
238			}
239		}
240	else
241		while ((ch = getchar()) != EOF)
242			(void)putchar(string1[ch]);
243	exit (0);
244}
245
246static void
247setup(string, arg, str, cflag)
248	int *string;
249	char *arg;
250	STR *str;
251	int cflag;
252{
253	int cnt, *p;
254
255	str->str = arg;
256	bzero(string, NCHARS * sizeof(int));
257	while (next(str))
258		string[str->lastch] = 1;
259	if (cflag)
260		for (p = string, cnt = NCHARS; cnt--; ++p)
261			*p = !*p;
262}
263
264static void
265usage()
266{
267	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
268		"usage: tr [-csu] string1 string2",
269		"       tr [-cu] -d string1",
270		"       tr [-cu] -s string1",
271		"       tr [-cu] -ds string1 string2");
272	exit(1);
273}
274