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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)tr.c 8.2 (Berkeley) 5/4/95 35 * $FreeBSD: src/usr.bin/tr/tr.c,v 1.8.2.2 2002/07/29 12:59:33 tjr Exp $ 36 */ 37 38 #include <sys/types.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <locale.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "extern.h" 49 50 /* 51 * For -C option: determine whether a byte is a valid character in the 52 * current character set (as defined by LC_CTYPE). 53 */ 54 #define ISCHAR(c) (iscntrl(c) || isprint(c)) 55 56 static int string1[NCHARS] = { 57 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */ 58 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 59 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 60 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 61 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 62 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 63 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 64 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 65 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 66 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 67 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 68 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 69 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 70 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 71 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 72 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 73 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 74 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 75 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 76 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 77 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 78 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 79 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 80 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 81 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 82 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 83 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 84 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 85 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 86 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 87 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 88 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 89 }, string2[NCHARS]; 90 91 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL }; 92 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL }; 93 94 static void setup(int *, char *, STR *, int, int); 95 static void usage(void); 96 97 int 98 main(int argc, char **argv) 99 { 100 int ch, cnt, lastch, *p; 101 int Cflag, cflag, dflag, sflag, isstring2; 102 103 (void)setlocale(LC_ALL, ""); 104 105 Cflag = cflag = dflag = sflag = 0; 106 while ((ch = getopt(argc, argv, "Ccdsu")) != -1) 107 switch((char)ch) { 108 case 'C': 109 Cflag = 1; 110 cflag = 0; 111 break; 112 case 'c': 113 cflag = 1; 114 Cflag = 0; 115 break; 116 case 'd': 117 dflag = 1; 118 break; 119 case 's': 120 sflag = 1; 121 break; 122 case 'u': 123 setbuf(stdout, NULL); 124 break; 125 case '?': 126 default: 127 usage(); 128 } 129 argc -= optind; 130 argv += optind; 131 132 switch(argc) { 133 case 0: 134 default: 135 usage(); 136 /* NOTREACHED */ 137 case 1: 138 isstring2 = 0; 139 break; 140 case 2: 141 isstring2 = 1; 142 break; 143 } 144 145 /* 146 * tr -ds [-Cc] string1 string2 147 * Delete all characters (or complemented characters) in string1. 148 * Squeeze all characters in string2. 149 */ 150 if (dflag && sflag) { 151 if (!isstring2) 152 usage(); 153 154 setup(string1, argv[0], &s1, cflag, Cflag); 155 setup(string2, argv[1], &s2, 0, 0); 156 157 for (lastch = OOBCH; (ch = getchar()) != EOF;) 158 if (!string1[ch] && (!string2[ch] || lastch != ch)) { 159 lastch = ch; 160 (void)putchar(ch); 161 } 162 exit(0); 163 } 164 165 /* 166 * tr -d [-Cc] string1 167 * Delete all characters (or complemented characters) in string1. 168 */ 169 if (dflag) { 170 if (isstring2) 171 usage(); 172 173 setup(string1, argv[0], &s1, cflag, Cflag); 174 175 while ((ch = getchar()) != EOF) 176 if (!string1[ch]) 177 (void)putchar(ch); 178 exit(0); 179 } 180 181 /* 182 * tr -s [-Cc] string1 183 * Squeeze all characters (or complemented characters) in string1. 184 */ 185 if (sflag && !isstring2) { 186 setup(string1, argv[0], &s1, cflag, Cflag); 187 188 for (lastch = OOBCH; (ch = getchar()) != EOF;) 189 if (!string1[ch] || lastch != ch) { 190 lastch = ch; 191 (void)putchar(ch); 192 } 193 exit(0); 194 } 195 196 /* 197 * tr [-Ccs] string1 string2 198 * Replace all characters (or complemented characters) in string1 with 199 * the character in the same position in string2. If the -s option is 200 * specified, squeeze all the characters in string2. 201 */ 202 if (!isstring2) 203 usage(); 204 205 s1.str = argv[0]; 206 s2.str = argv[1]; 207 208 if (cflag || Cflag) 209 for (cnt = NCHARS, p = string1; cnt--;) 210 *p++ = OOBCH; 211 212 if (!next(&s2)) 213 errx(1, "empty string2"); 214 215 ch = s2.lastch; 216 /* If string2 runs out of characters, use the last one specified. */ 217 if (sflag) 218 while (next(&s1)) { 219 string1[s1.lastch] = ch = s2.lastch; 220 string2[ch] = 1; 221 (void)next(&s2); 222 } 223 else 224 while (next(&s1)) { 225 string1[s1.lastch] = ch = s2.lastch; 226 (void)next(&s2); 227 } 228 229 if (cflag) 230 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt) 231 *p = *p == OOBCH ? ch : cnt; 232 else if (Cflag) 233 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt) 234 *p = *p == OOBCH && ISCHAR(cnt) ? ch : cnt; 235 236 if (sflag) 237 for (lastch = OOBCH; (ch = getchar()) != EOF;) { 238 ch = string1[ch]; 239 if (!string2[ch] || lastch != ch) { 240 lastch = ch; 241 (void)putchar(ch); 242 } 243 } 244 else 245 while ((ch = getchar()) != EOF) 246 (void)putchar(string1[ch]); 247 exit (0); 248 } 249 250 static void 251 setup(int *string, char *arg, STR *str, int cflag, int Cflag) 252 { 253 int cnt, *p; 254 255 str->str = arg; 256 bzero(string, NCHARS * sizeof(int)); 257 while (next(str)) 258 string[str->lastch] = 1; 259 if (cflag) 260 for (p = string, cnt = NCHARS; cnt--; ++p) 261 *p = !*p; 262 else if (Cflag) 263 for (cnt = 0; cnt < NCHARS; cnt++) 264 string[cnt] = !string[cnt] && ISCHAR(cnt); 265 } 266 267 static void 268 usage(void) 269 { 270 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", 271 "usage: tr [-Ccsu] string1 string2", 272 " tr [-Ccu] -d string1", 273 " tr [-Ccu] -s string1", 274 " tr [-Ccu] -ds string1 string2"); 275 exit(1); 276 } 277