Annotation of src/usr.bin/tr/tr.c, Revision 1.19
1.19 ! deraadt 1: /* $OpenBSD: tr.c,v 1.18 2015/10/06 13:49:33 deraadt Exp $ */
1.1 deraadt 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.
1.9 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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>
1.5 mickey 39: #include <err.h>
1.1 deraadt 40:
41: #include "extern.h"
42:
43: static int string1[NCHARS] = {
44: 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */
45: 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
46: 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
47: 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
48: 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
49: 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
50: 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
51: 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
52: 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
53: 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
54: 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
55: 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
56: 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
57: 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
58: 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
59: 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
60: 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
61: 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
62: 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
63: 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
64: 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
65: 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
66: 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
67: 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
68: 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
69: 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
70: 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
71: 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
72: 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
73: 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
74: 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
75: 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
76: }, string2[NCHARS];
77:
78: STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
79: STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
80:
1.8 millert 81: static void setup(int *, char *, STR *, int);
82: static void usage(void);
1.1 deraadt 83:
84: int
1.10 deraadt 85: main(int argc, char *argv[])
1.1 deraadt 86: {
1.6 mpech 87: int ch, cnt, lastch, *p;
1.1 deraadt 88: int cflag, dflag, sflag, isstring2;
1.18 deraadt 89:
1.19 ! deraadt 90: if (pledge("stdio", NULL) == -1)
! 91: err(1, "pledge");
1.1 deraadt 92:
93: cflag = dflag = sflag = 0;
1.17 millert 94: while ((ch = getopt(argc, argv, "Ccds")) != -1)
1.16 okan 95: switch(ch) {
1.17 millert 96: case 'C':
1.1 deraadt 97: case 'c':
98: cflag = 1;
99: break;
100: case 'd':
101: dflag = 1;
102: break;
103: case 's':
104: sflag = 1;
105: break;
106: case '?':
107: default:
108: usage();
109: }
110: argc -= optind;
111: argv += optind;
112:
113: switch(argc) {
114: case 0:
115: default:
116: usage();
117: /* NOTREACHED */
118: case 1:
119: isstring2 = 0;
120: break;
121: case 2:
122: isstring2 = 1;
123: break;
124: }
125:
126: /*
1.17 millert 127: * tr -ds [-Cc] string1 string2
1.1 deraadt 128: * Delete all characters (or complemented characters) in string1.
129: * Squeeze all characters in string2.
130: */
131: if (dflag && sflag) {
132: if (!isstring2)
133: usage();
134:
135: setup(string1, argv[0], &s1, cflag);
136: setup(string2, argv[1], &s2, 0);
1.12 deraadt 137:
1.1 deraadt 138: for (lastch = OOBCH; (ch = getchar()) != EOF;)
139: if (!string1[ch] && (!string2[ch] || lastch != ch)) {
140: lastch = ch;
141: (void)putchar(ch);
142: }
143: exit(0);
144: }
145:
146: /*
1.17 millert 147: * tr -d [-Cc] string1
1.1 deraadt 148: * Delete all characters (or complemented characters) in string1.
149: */
150: if (dflag) {
151: if (isstring2)
152: usage();
153:
154: setup(string1, argv[0], &s1, cflag);
155:
156: while ((ch = getchar()) != EOF)
157: if (!string1[ch])
158: (void)putchar(ch);
159: exit(0);
160: }
161:
162: /*
1.17 millert 163: * tr -s [-Cc] string1
1.1 deraadt 164: * Squeeze all characters (or complemented characters) in string1.
165: */
166: if (sflag && !isstring2) {
167: setup(string1, argv[0], &s1, cflag);
168:
169: for (lastch = OOBCH; (ch = getchar()) != EOF;)
170: if (!string1[ch] || lastch != ch) {
171: lastch = ch;
172: (void)putchar(ch);
173: }
174: exit(0);
175: }
176:
177: /*
1.17 millert 178: * tr [-Ccs] string1 string2
1.1 deraadt 179: * Replace all characters (or complemented characters) in string1 with
180: * the character in the same position in string2. If the -s option is
181: * specified, squeeze all the characters in string2.
182: */
183: if (!isstring2)
184: usage();
185:
1.13 deraadt 186: s1.str = (unsigned char *)argv[0];
187: s2.str = (unsigned char *)argv[1];
1.1 deraadt 188:
189: if (cflag)
190: for (cnt = NCHARS, p = string1; cnt--;)
191: *p++ = OOBCH;
192:
193: if (!next(&s2))
1.5 mickey 194: errx(1, "empty string2");
1.1 deraadt 195:
196: /* If string2 runs out of characters, use the last one specified. */
1.7 deraadt 197: ch = s2.lastch;
1.1 deraadt 198: if (sflag)
199: while (next(&s1)) {
200: string1[s1.lastch] = ch = s2.lastch;
201: string2[ch] = 1;
202: (void)next(&s2);
203: }
204: else
205: while (next(&s1)) {
206: string1[s1.lastch] = ch = s2.lastch;
207: (void)next(&s2);
208: }
209:
210: if (cflag)
211: for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
212: *p = *p == OOBCH ? ch : cnt;
213:
214: if (sflag)
215: for (lastch = OOBCH; (ch = getchar()) != EOF;) {
216: ch = string1[ch];
217: if (!string2[ch] || lastch != ch) {
218: lastch = ch;
219: (void)putchar(ch);
220: }
221: }
222: else
223: while ((ch = getchar()) != EOF)
224: (void)putchar(string1[ch]);
225: exit (0);
226: }
227:
228: static void
1.10 deraadt 229: setup(int *string, char *arg, STR *str, int cflag)
1.1 deraadt 230: {
1.6 mpech 231: int cnt, *p;
1.1 deraadt 232:
1.13 deraadt 233: str->str = (unsigned char *)arg;
1.1 deraadt 234: bzero(string, NCHARS * sizeof(int));
235: while (next(str))
236: string[str->lastch] = 1;
237: if (cflag)
238: for (p = string, cnt = NCHARS; cnt--; ++p)
239: *p = !*p;
240: }
241:
242: static void
1.10 deraadt 243: usage(void)
1.1 deraadt 244: {
1.14 sobrado 245: fprintf(stderr,
1.17 millert 246: "usage: tr [-Ccs] string1 string2\n"
247: " tr [-Cc] -d string1\n"
248: " tr [-Cc] -s string1\n"
249: " tr [-Cc] -ds string1 string2\n");
1.1 deraadt 250: exit(1);
251: }
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