1 /* $OpenBSD: tr.c,v 1.19 2015/10/09 01:37:09 deraadt 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 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 81 static void setup(int *, char *, STR *, int); 82 static void usage(void); 83 84 int 85 main(int argc, char *argv[]) 86 { 87 int ch, cnt, lastch, *p; 88 int cflag, dflag, sflag, isstring2; 89 90 if (pledge("stdio", NULL) == -1) 91 err(1, "pledge"); 92 93 cflag = dflag = sflag = 0; 94 while ((ch = getopt(argc, argv, "Ccds")) != -1) 95 switch(ch) { 96 case 'C': 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 /* 127 * tr -ds [-Cc] string1 string2 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); 137 138 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 /* 147 * tr -d [-Cc] string1 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 /* 163 * tr -s [-Cc] string1 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 /* 178 * tr [-Ccs] string1 string2 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(); 185 186 s1.str = (unsigned char *)argv[0]; 187 s2.str = (unsigned char *)argv[1]; 188 189 if (cflag) 190 for (cnt = NCHARS, p = string1; cnt--;) 191 *p++ = OOBCH; 192 193 if (!next(&s2)) 194 errx(1, "empty string2"); 195 196 /* If string2 runs out of characters, use the last one specified. */ 197 ch = s2.lastch; 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 229 setup(int *string, char *arg, STR *str, int cflag) 230 { 231 int cnt, *p; 232 233 str->str = (unsigned char *)arg; 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 243 usage(void) 244 { 245 fprintf(stderr, 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"); 250 exit(1); 251 } 252