1 /* $OpenBSD: tr.c,v 1.22 2022/12/04 23:50:49 cheloha Exp $ */
2 /* $NetBSD: tr.c,v 1.5 1995/08/31 22:13:48 jtc Exp $ */
3
4 /*
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/types.h>
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include <err.h>
40
41 #include "extern.h"
42
43 int delete[NCHARS], squeeze[NCHARS];
44 int translate[NCHARS] = {
45 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */
46 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
47 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
48 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
49 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
50 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
51 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
52 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
53 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
54 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
55 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
56 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
57 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
58 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
59 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
60 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
61 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
62 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
63 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
64 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
65 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
66 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
67 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
68 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
69 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
70 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
71 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
72 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
73 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
74 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
75 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
76 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
77 };
78
79 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
80 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
81
82 static void setup(int *, char *, STR *, int);
83 static void usage(void);
84
85 int
main(int argc,char * argv[])86 main(int argc, char *argv[])
87 {
88 int ch, cnt, lastch, *p;
89 int cflag, dflag, sflag;
90
91 if (pledge("stdio", NULL) == -1)
92 err(1, "pledge");
93
94 cflag = dflag = sflag = 0;
95 while ((ch = getopt(argc, argv, "Ccds")) != -1)
96 switch(ch) {
97 case 'C':
98 case 'c':
99 cflag = 1;
100 break;
101 case 'd':
102 dflag = 1;
103 break;
104 case 's':
105 sflag = 1;
106 break;
107 default:
108 usage();
109 }
110 argc -= optind;
111 argv += optind;
112
113 if (argc < 1 || argc > 2)
114 usage();
115
116 /*
117 * tr -ds [-Cc] string1 string2
118 * Delete all characters (or complemented characters) in string1.
119 * Squeeze all characters in string2.
120 */
121 if (dflag && sflag) {
122 if (argc != 2)
123 usage();
124
125 setup(delete, argv[0], &s1, cflag);
126 setup(squeeze, argv[1], &s2, 0);
127
128 for (lastch = OOBCH; (ch = getchar()) != EOF;)
129 if (!delete[ch] && (!squeeze[ch] || lastch != ch)) {
130 lastch = ch;
131 (void)putchar(ch);
132 }
133 exit(0);
134 }
135
136 /*
137 * tr -d [-Cc] string1
138 * Delete all characters (or complemented characters) in string1.
139 */
140 if (dflag) {
141 if (argc != 1)
142 usage();
143
144 setup(delete, argv[0], &s1, cflag);
145
146 while ((ch = getchar()) != EOF)
147 if (!delete[ch])
148 (void)putchar(ch);
149 exit(0);
150 }
151
152 /*
153 * tr -s [-Cc] string1
154 * Squeeze all characters (or complemented characters) in string1.
155 */
156 if (sflag && argc == 1) {
157 setup(squeeze, argv[0], &s1, cflag);
158
159 for (lastch = OOBCH; (ch = getchar()) != EOF;)
160 if (!squeeze[ch] || lastch != ch) {
161 lastch = ch;
162 (void)putchar(ch);
163 }
164 exit(0);
165 }
166
167 /*
168 * tr [-Ccs] string1 string2
169 * Replace all characters (or complemented characters) in string1 with
170 * the character in the same position in string2. If the -s option is
171 * specified, squeeze all the characters in string2.
172 */
173 if (argc != 2)
174 usage();
175
176 s1.str = (unsigned char *)argv[0];
177 s2.str = (unsigned char *)argv[1];
178
179 if (cflag)
180 for (cnt = NCHARS, p = translate; cnt--;)
181 *p++ = OOBCH;
182
183 if (!next(&s2))
184 errx(1, "empty string2");
185
186 /* If string2 runs out of characters, use the last one specified. */
187 ch = s2.lastch;
188 if (sflag)
189 while (next(&s1)) {
190 translate[s1.lastch] = ch = s2.lastch;
191 squeeze[ch] = 1;
192 (void)next(&s2);
193 }
194 else
195 while (next(&s1)) {
196 translate[s1.lastch] = ch = s2.lastch;
197 (void)next(&s2);
198 }
199
200 if (cflag)
201 for (cnt = 0, p = translate; cnt < NCHARS; ++p, ++cnt)
202 *p = *p == OOBCH ? ch : cnt;
203
204 if (sflag)
205 for (lastch = OOBCH; (ch = getchar()) != EOF;) {
206 ch = translate[ch];
207 if (!squeeze[ch] || lastch != ch) {
208 lastch = ch;
209 (void)putchar(ch);
210 }
211 }
212 else
213 while ((ch = getchar()) != EOF)
214 (void)putchar(translate[ch]);
215 exit (0);
216 }
217
218 static void
setup(int * table,char * arg,STR * str,int cflag)219 setup(int *table, char *arg, STR *str, int cflag)
220 {
221 int cnt, *p;
222
223 str->str = (unsigned char *)arg;
224 bzero(table, NCHARS * sizeof(int));
225 while (next(str))
226 table[str->lastch] = 1;
227 if (cflag)
228 for (p = table, cnt = NCHARS; cnt--; ++p)
229 *p = !*p;
230 }
231
232 static void
usage(void)233 usage(void)
234 {
235 fprintf(stderr,
236 "usage: tr [-Ccs] string1 string2\n"
237 " tr [-Cc] -d string1\n"
238 " tr [-Cc] -s string1\n"
239 " tr [-Cc] -ds string1 string2\n");
240 exit(1);
241 }
242