tr.c revision 1.15
1 /* $NetBSD: tr.c,v 1.15 2013/08/11 00:28:46 dholland 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95"; 41 #endif 42 __RCSID("$NetBSD: tr.c,v 1.15 2013/08/11 00:28:46 dholland Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <err.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #include "extern.h" 54 55 static int string1[NCHARS] = { 56 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */ 57 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 58 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 59 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 60 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 61 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 62 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 63 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 64 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 65 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 66 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 67 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 68 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 69 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 70 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 71 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 72 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 73 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 74 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 75 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 76 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 77 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 78 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 79 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 80 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 81 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 82 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 83 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 84 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 85 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 86 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 87 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 88 }, string2[NCHARS]; 89 90 static void setup(int *, const char *, STR *, int); 91 __dead static void usage(void); 92 93 int 94 main(int argc, char **argv) 95 { 96 int ch, ch2, lastch; 97 int cflag, dflag, sflag, isstring2; 98 STR *s1, *s2; 99 100 cflag = dflag = sflag = 0; 101 while ((ch = getopt(argc, argv, "cds")) != -1) 102 switch (ch) { 103 case 'c': 104 cflag = 1; 105 break; 106 case 'd': 107 dflag = 1; 108 break; 109 case 's': 110 sflag = 1; 111 break; 112 case '?': 113 default: 114 usage(); 115 } 116 argc -= optind; 117 argv += optind; 118 119 switch(argc) { 120 case 0: 121 default: 122 usage(); 123 /* NOTREACHED */ 124 case 1: 125 isstring2 = 0; 126 break; 127 case 2: 128 isstring2 = 1; 129 break; 130 } 131 132 s1 = str_create(1); 133 s2 = str_create(2); 134 135 /* 136 * tr -ds [-c] string1 string2 137 * Delete all characters (or complemented characters) in string1. 138 * Squeeze all characters in string2. 139 */ 140 if (dflag && sflag) { 141 if (!isstring2) 142 usage(); 143 144 setup(string1, argv[0], s1, cflag); 145 setup(string2, argv[1], s2, 0); 146 147 for (lastch = OOBCH; (ch = getchar()) != EOF;) 148 if (!string1[ch] && (!string2[ch] || lastch != ch)) { 149 lastch = ch; 150 (void)putchar(ch); 151 } 152 str_destroy(s1); 153 str_destroy(s2); 154 exit(0); 155 } 156 157 /* 158 * tr -d [-c] string1 159 * Delete all characters (or complemented characters) in string1. 160 */ 161 if (dflag) { 162 if (isstring2) 163 usage(); 164 165 setup(string1, argv[0], s1, cflag); 166 167 while ((ch = getchar()) != EOF) 168 if (!string1[ch]) 169 (void)putchar(ch); 170 str_destroy(s1); 171 str_destroy(s2); 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 str_destroy(s1); 188 str_destroy(s2); 189 exit(0); 190 } 191 192 /* 193 * tr [-cs] string1 string2 194 * Replace all characters (or complemented characters) in string1 with 195 * the character in the same position in string2. If the -s option is 196 * specified, squeeze all the characters in string2. 197 */ 198 if (!isstring2) 199 usage(); 200 201 if (cflag) { 202 setup(string1, argv[0], s1, cflag); 203 ch = -1; 204 } else { 205 str_setstring(s1, argv[0]); 206 } 207 str_setstring(s2, argv[1]); 208 209 if (!next(s2, &ch2)) 210 errx(1, "empty string2"); 211 212 /* If string2 runs out of characters, use the last one specified. */ 213 while (1) { 214 if (cflag) { 215 ch++; 216 while (ch < NCHARS && string1[ch] == 0) { 217 if (string1[ch] == 0) { 218 string1[ch] = ch; 219 } 220 ch++; 221 } 222 if (ch == NCHARS) { 223 break; 224 } 225 } 226 else { 227 if (!next(s1, &ch)) { 228 break; 229 } 230 } 231 232 string1[ch] = ch2; 233 if (sflag) { 234 string2[ch2] = 1; 235 } 236 (void)next(s2, &ch2); 237 } 238 239 if (sflag) 240 for (lastch = OOBCH; (ch = getchar()) != EOF;) { 241 ch = string1[ch]; 242 if (!string2[ch] || lastch != ch) { 243 lastch = ch; 244 (void)putchar(ch); 245 } 246 } 247 else 248 while ((ch = getchar()) != EOF) 249 (void)putchar(string1[ch]); 250 251 str_destroy(s1); 252 str_destroy(s2); 253 exit (0); 254 } 255 256 static void 257 setup(int *string, const char *arg, STR *str, int cflag) 258 { 259 int cnt, *p; 260 int ch; 261 262 str_setstring(str, arg); 263 memset(string, 0, NCHARS * sizeof(int)); 264 while (next(str, &ch)) 265 string[ch] = 1; 266 if (cflag) 267 for (p = string, cnt = NCHARS; cnt--; ++p) 268 *p = !*p; 269 } 270 271 static void 272 usage(void) 273 { 274 (void)fprintf(stderr, "usage: tr [-cs] string1 string2\n"); 275 (void)fprintf(stderr, " tr [-c] -d string1\n"); 276 (void)fprintf(stderr, " tr [-c] -s string1\n"); 277 (void)fprintf(stderr, " tr [-c] -ds string1 string2\n"); 278 exit(1); 279 } 280
Indexes created Tue Sep 30 20:09:53 GMT 2025