Annotation of src/usr.bin/tr/tr.c, Revision 1.16
1.16 ! okan 1: /* $OpenBSD: tr.c,v 1.15 2009/10/27 23:59:46 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;
89:
90: cflag = dflag = sflag = 0;
1.3 millert 91: while ((ch = getopt(argc, argv, "cds")) != -1)
1.16 ! okan 92: switch(ch) {
1.1 deraadt 93: case 'c':
94: cflag = 1;
95: break;
96: case 'd':
97: dflag = 1;
98: break;
99: case 's':
100: sflag = 1;
101: break;
102: case '?':
103: default:
104: usage();
105: }
106: argc -= optind;
107: argv += optind;
108:
109: switch(argc) {
110: case 0:
111: default:
112: usage();
113: /* NOTREACHED */
114: case 1:
115: isstring2 = 0;
116: break;
117: case 2:
118: isstring2 = 1;
119: break;
120: }
121:
122: /*
123: * tr -ds [-c] string1 string2
124: * Delete all characters (or complemented characters) in string1.
125: * Squeeze all characters in string2.
126: */
127: if (dflag && sflag) {
128: if (!isstring2)
129: usage();
130:
131: setup(string1, argv[0], &s1, cflag);
132: setup(string2, argv[1], &s2, 0);
1.12 deraadt 133:
1.1 deraadt 134: for (lastch = OOBCH; (ch = getchar()) != EOF;)
135: if (!string1[ch] && (!string2[ch] || lastch != ch)) {
136: lastch = ch;
137: (void)putchar(ch);
138: }
139: exit(0);
140: }
141:
142: /*
143: * tr -d [-c] string1
144: * Delete all characters (or complemented characters) in string1.
145: */
146: if (dflag) {
147: if (isstring2)
148: usage();
149:
150: setup(string1, argv[0], &s1, cflag);
151:
152: while ((ch = getchar()) != EOF)
153: if (!string1[ch])
154: (void)putchar(ch);
155: exit(0);
156: }
157:
158: /*
159: * tr -s [-c] string1
160: * Squeeze all characters (or complemented characters) in string1.
161: */
162: if (sflag && !isstring2) {
163: setup(string1, argv[0], &s1, cflag);
164:
165: for (lastch = OOBCH; (ch = getchar()) != EOF;)
166: if (!string1[ch] || lastch != ch) {
167: lastch = ch;
168: (void)putchar(ch);
169: }
170: exit(0);
171: }
172:
173: /*
174: * tr [-cs] string1 string2
175: * Replace all characters (or complemented characters) in string1 with
176: * the character in the same position in string2. If the -s option is
177: * specified, squeeze all the characters in string2.
178: */
179: if (!isstring2)
180: usage();
181:
1.13 deraadt 182: s1.str = (unsigned char *)argv[0];
183: s2.str = (unsigned char *)argv[1];
1.1 deraadt 184:
185: if (cflag)
186: for (cnt = NCHARS, p = string1; cnt--;)
187: *p++ = OOBCH;
188:
189: if (!next(&s2))
1.5 mickey 190: errx(1, "empty string2");
1.1 deraadt 191:
192: /* If string2 runs out of characters, use the last one specified. */
1.7 deraadt 193: ch = s2.lastch;
1.1 deraadt 194: if (sflag)
195: while (next(&s1)) {
196: string1[s1.lastch] = ch = s2.lastch;
197: string2[ch] = 1;
198: (void)next(&s2);
199: }
200: else
201: while (next(&s1)) {
202: string1[s1.lastch] = ch = s2.lastch;
203: (void)next(&s2);
204: }
205:
206: if (cflag)
207: for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
208: *p = *p == OOBCH ? ch : cnt;
209:
210: if (sflag)
211: for (lastch = OOBCH; (ch = getchar()) != EOF;) {
212: ch = string1[ch];
213: if (!string2[ch] || lastch != ch) {
214: lastch = ch;
215: (void)putchar(ch);
216: }
217: }
218: else
219: while ((ch = getchar()) != EOF)
220: (void)putchar(string1[ch]);
221: exit (0);
222: }
223:
224: static void
1.10 deraadt 225: setup(int *string, char *arg, STR *str, int cflag)
1.1 deraadt 226: {
1.6 mpech 227: int cnt, *p;
1.1 deraadt 228:
1.13 deraadt 229: str->str = (unsigned char *)arg;
1.1 deraadt 230: bzero(string, NCHARS * sizeof(int));
231: while (next(str))
232: string[str->lastch] = 1;
233: if (cflag)
234: for (p = string, cnt = NCHARS; cnt--; ++p)
235: *p = !*p;
236: }
237:
238: static void
1.10 deraadt 239: usage(void)
1.1 deraadt 240: {
1.14 sobrado 241: fprintf(stderr,
242: "usage: tr [-cs] string1 string2\n"
243: " tr [-c] -d string1\n"
244: " tr [-c] -s string1\n"
245: " tr [-c] -ds string1 string2\n");
1.1 deraadt 246: exit(1);
247: }
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