1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)tr.c 8.2 (Berkeley) 5/4/95 31 * $FreeBSD: src/usr.bin/tr/tr.c,v 1.8.2.2 2002/07/29 12:59:33 tjr Exp $ 32 */ 33 34 #include <sys/types.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <locale.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include "extern.h" 45 46 /* 47 * For -C option: determine whether a byte is a valid character in the 48 * current character set (as defined by LC_CTYPE). 49 */ 50 #define ISCHAR(c) (iscntrl(c) || isprint(c)) 51 52 static int string1[NCHARS] = { 53 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */ 54 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 55 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 56 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 57 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 58 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 59 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 60 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 61 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 62 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 63 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 64 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 65 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 66 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 67 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 68 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 69 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 70 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 71 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 72 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 73 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 74 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 75 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 76 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 77 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 78 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 79 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 80 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 81 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 82 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 83 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 84 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 85 }, string2[NCHARS]; 86 87 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL }; 88 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL }; 89 90 static void setup(int *, char *, STR *, int, int); 91 static void usage(void); 92 93 int 94 main(int argc, char **argv) 95 { 96 int ch, cnt, lastch, *p; 97 int Cflag, cflag, dflag, sflag, isstring2; 98 99 (void)setlocale(LC_ALL, ""); 100 101 Cflag = cflag = dflag = sflag = 0; 102 while ((ch = getopt(argc, argv, "Ccdsu")) != -1) 103 switch((char)ch) { 104 case 'C': 105 Cflag = 1; 106 cflag = 0; 107 break; 108 case 'c': 109 cflag = 1; 110 Cflag = 0; 111 break; 112 case 'd': 113 dflag = 1; 114 break; 115 case 's': 116 sflag = 1; 117 break; 118 case 'u': 119 setbuf(stdout, NULL); 120 break; 121 case '?': 122 default: 123 usage(); 124 } 125 argc -= optind; 126 argv += optind; 127 128 switch(argc) { 129 case 0: 130 default: 131 usage(); 132 /* NOTREACHED */ 133 case 1: 134 isstring2 = 0; 135 break; 136 case 2: 137 isstring2 = 1; 138 break; 139 } 140 141 /* 142 * tr -ds [-Cc] string1 string2 143 * Delete all characters (or complemented characters) in string1. 144 * Squeeze all characters in string2. 145 */ 146 if (dflag && sflag) { 147 if (!isstring2) 148 usage(); 149 150 setup(string1, argv[0], &s1, cflag, Cflag); 151 setup(string2, argv[1], &s2, 0, 0); 152 153 for (lastch = OOBCH; (ch = getchar()) != EOF;) 154 if (!string1[ch] && (!string2[ch] || lastch != ch)) { 155 lastch = ch; 156 (void)putchar(ch); 157 } 158 exit(0); 159 } 160 161 /* 162 * tr -d [-Cc] string1 163 * Delete all characters (or complemented characters) in string1. 164 */ 165 if (dflag) { 166 if (isstring2) 167 usage(); 168 169 setup(string1, argv[0], &s1, cflag, Cflag); 170 171 while ((ch = getchar()) != EOF) 172 if (!string1[ch]) 173 (void)putchar(ch); 174 exit(0); 175 } 176 177 /* 178 * tr -s [-Cc] string1 179 * Squeeze all characters (or complemented characters) in string1. 180 */ 181 if (sflag && !isstring2) { 182 setup(string1, argv[0], &s1, cflag, Cflag); 183 184 for (lastch = OOBCH; (ch = getchar()) != EOF;) 185 if (!string1[ch] || lastch != ch) { 186 lastch = ch; 187 (void)putchar(ch); 188 } 189 exit(0); 190 } 191 192 /* 193 * tr [-Ccs] 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 s1.str = argv[0]; 202 s2.str = argv[1]; 203 204 if (cflag || Cflag) 205 for (cnt = NCHARS, p = string1; cnt--;) 206 *p++ = OOBCH; 207 208 if (!next(&s2)) 209 errx(1, "empty string2"); 210 211 ch = s2.lastch; 212 /* If string2 runs out of characters, use the last one specified. */ 213 if (sflag) 214 while (next(&s1)) { 215 string1[s1.lastch] = ch = s2.lastch; 216 string2[ch] = 1; 217 (void)next(&s2); 218 } 219 else 220 while (next(&s1)) { 221 string1[s1.lastch] = ch = s2.lastch; 222 (void)next(&s2); 223 } 224 225 if (cflag) 226 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt) 227 *p = *p == OOBCH ? ch : cnt; 228 else if (Cflag) 229 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt) 230 *p = *p == OOBCH && ISCHAR(cnt) ? ch : cnt; 231 232 if (sflag) 233 for (lastch = OOBCH; (ch = getchar()) != EOF;) { 234 ch = string1[ch]; 235 if (!string2[ch] || lastch != ch) { 236 lastch = ch; 237 (void)putchar(ch); 238 } 239 } 240 else 241 while ((ch = getchar()) != EOF) 242 (void)putchar(string1[ch]); 243 exit (0); 244 } 245 246 static void 247 setup(int *string, char *arg, STR *str, int cflag, int Cflag) 248 { 249 int cnt, *p; 250 251 str->str = arg; 252 bzero(string, NCHARS * sizeof(int)); 253 while (next(str)) 254 string[str->lastch] = 1; 255 if (cflag) 256 for (p = string, cnt = NCHARS; cnt--; ++p) 257 *p = !*p; 258 else if (Cflag) 259 for (cnt = 0; cnt < NCHARS; cnt++) 260 string[cnt] = !string[cnt] && ISCHAR(cnt); 261 } 262 263 static void 264 usage(void) 265 { 266 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 267 "usage: tr [-Ccsu] string1 string2", 268 " tr [-Ccu] -d string1", 269 " tr [-Ccu] -s string1", 270 " tr [-Ccu] -ds string1 string2"); 271 exit(1); 272 } 273