Annotation of src/usr.bin/tr/tr.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: tr.c,v 1.5 1995/08/31 22:13:48 jtc Exp $ */
2:
3: /*
4: * Copyright (c) 1988, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1988, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95";
45: #endif
46: static char rcsid[] = "$NetBSD: tr.c,v 1.5 1995/08/31 22:13:48 jtc Exp $";
47: #endif /* not lint */
48:
49: #include <sys/types.h>
50:
51: #include <stdio.h>
52: #include <stdlib.h>
53: #include <string.h>
54: #include <unistd.h>
55:
56: #include "extern.h"
57:
58: static int string1[NCHARS] = {
59: 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */
60: 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
61: 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
62: 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
63: 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
64: 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
65: 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
66: 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
67: 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
68: 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
69: 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
70: 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
71: 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
72: 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
73: 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
74: 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
75: 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
76: 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
77: 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
78: 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
79: 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
80: 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
81: 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
82: 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
83: 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
84: 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
85: 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
86: 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
87: 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
88: 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
89: 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
90: 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
91: }, string2[NCHARS];
92:
93: STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
94: STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
95:
96: static void setup __P((int *, char *, STR *, int));
97: static void usage __P((void));
98:
99: int
100: main(argc, argv)
101: int argc;
102: char **argv;
103: {
104: register int ch, cnt, lastch, *p;
105: int cflag, dflag, sflag, isstring2;
106:
107: cflag = dflag = sflag = 0;
108: while ((ch = getopt(argc, argv, "cds")) != EOF)
109: switch((char)ch) {
110: case 'c':
111: cflag = 1;
112: break;
113: case 'd':
114: dflag = 1;
115: break;
116: case 's':
117: sflag = 1;
118: break;
119: case '?':
120: default:
121: usage();
122: }
123: argc -= optind;
124: argv += optind;
125:
126: switch(argc) {
127: case 0:
128: default:
129: usage();
130: /* NOTREACHED */
131: case 1:
132: isstring2 = 0;
133: break;
134: case 2:
135: isstring2 = 1;
136: break;
137: }
138:
139: /*
140: * tr -ds [-c] string1 string2
141: * Delete all characters (or complemented characters) in string1.
142: * Squeeze all characters in string2.
143: */
144: if (dflag && sflag) {
145: if (!isstring2)
146: usage();
147:
148: setup(string1, argv[0], &s1, cflag);
149: setup(string2, argv[1], &s2, 0);
150:
151: for (lastch = OOBCH; (ch = getchar()) != EOF;)
152: if (!string1[ch] && (!string2[ch] || lastch != ch)) {
153: lastch = ch;
154: (void)putchar(ch);
155: }
156: exit(0);
157: }
158:
159: /*
160: * tr -d [-c] string1
161: * Delete all characters (or complemented characters) in string1.
162: */
163: if (dflag) {
164: if (isstring2)
165: usage();
166:
167: setup(string1, argv[0], &s1, cflag);
168:
169: while ((ch = getchar()) != EOF)
170: if (!string1[ch])
171: (void)putchar(ch);
172: exit(0);
173: }
174:
175: /*
176: * tr -s [-c] string1
177: * Squeeze all characters (or complemented characters) in string1.
178: */
179: if (sflag && !isstring2) {
180: setup(string1, argv[0], &s1, cflag);
181:
182: for (lastch = OOBCH; (ch = getchar()) != EOF;)
183: if (!string1[ch] || lastch != ch) {
184: lastch = ch;
185: (void)putchar(ch);
186: }
187: exit(0);
188: }
189:
190: /*
191: * tr [-cs] string1 string2
192: * Replace all characters (or complemented characters) in string1 with
193: * the character in the same position in string2. If the -s option is
194: * specified, squeeze all the characters in string2.
195: */
196: if (!isstring2)
197: usage();
198:
199: s1.str = argv[0];
200: s2.str = argv[1];
201:
202: if (cflag)
203: for (cnt = NCHARS, p = string1; cnt--;)
204: *p++ = OOBCH;
205:
206: if (!next(&s2))
207: err("empty string2");
208:
209: /* If string2 runs out of characters, use the last one specified. */
210: if (sflag)
211: while (next(&s1)) {
212: string1[s1.lastch] = ch = s2.lastch;
213: string2[ch] = 1;
214: (void)next(&s2);
215: }
216: else
217: while (next(&s1)) {
218: string1[s1.lastch] = ch = s2.lastch;
219: (void)next(&s2);
220: }
221:
222: if (cflag)
223: for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
224: *p = *p == OOBCH ? ch : cnt;
225:
226: if (sflag)
227: for (lastch = OOBCH; (ch = getchar()) != EOF;) {
228: ch = string1[ch];
229: if (!string2[ch] || lastch != ch) {
230: lastch = ch;
231: (void)putchar(ch);
232: }
233: }
234: else
235: while ((ch = getchar()) != EOF)
236: (void)putchar(string1[ch]);
237: exit (0);
238: }
239:
240: static void
241: setup(string, arg, str, cflag)
242: int *string;
243: char *arg;
244: STR *str;
245: int cflag;
246: {
247: register int cnt, *p;
248:
249: str->str = arg;
250: bzero(string, NCHARS * sizeof(int));
251: while (next(str))
252: string[str->lastch] = 1;
253: if (cflag)
254: for (p = string, cnt = NCHARS; cnt--; ++p)
255: *p = !*p;
256: }
257:
258: static void
259: usage()
260: {
261: (void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
262: (void)fprintf(stderr, " tr [-c] -d string1\n");
263: (void)fprintf(stderr, " tr [-c] -s string1\n");
264: (void)fprintf(stderr, " tr [-c] -ds string1 string2\n");
265: exit(1);
266: }
267:
268: #if __STDC__
269: #include <stdarg.h>
270: #else
271: #include <varargs.h>
272: #endif
273:
274: void
275: #if __STDC__
276: err(const char *fmt, ...)
277: #else
278: err(fmt, va_alist)
279: char *fmt;
280: va_dcl
281: #endif
282: {
283: va_list ap;
284: #if __STDC__
285: va_start(ap, fmt);
286: #else
287: va_start(ap);
288: #endif
289: (void)fprintf(stderr, "tr: ");
290: (void)vfprintf(stderr, fmt, ap);
291: va_end(ap);
292: (void)fprintf(stderr, "\n");
293: exit(1);
294: /* NOTREACHED */
295: }
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