usr.bin/tr/tr.c

   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  * $DragonFly: src/usr.bin/tr/tr.c,v 1.3 2003/10/04 20:36:53 hmp Exp $
  37  */
  38
  39 #include <sys/types.h>
  40
  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 static int string1[NCHARS] = {
  51         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,         /* ASCII */
  52         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  53         0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  54         0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  55         0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
  56         0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
  57         0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
  58         0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
  59         0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
  60         0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
  61         0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
  62         0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
  63         0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
  64         0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
  65         0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
  66         0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
  67         0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
  68         0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
  69         0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
  70         0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
  71         0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
  72         0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
  73         0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
  74         0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
  75         0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
  76         0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
  77         0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
  78         0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
  79         0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
  80         0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
  81         0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
  82         0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
  83 }, string2[NCHARS];
  84
  85 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
  86 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
  87
  88 static void setup(int *, char *, STR *, int);
  89 static void usage(void);
  90
  91 int
  92 main(int argc, char **argv)
  93 {
  94         int ch, cnt, lastch, *p;
  95         int cflag, dflag, sflag, isstring2;
  96
  97         (void)setlocale(LC_ALL, "");
  98
  99         cflag = dflag = sflag = 0;
 100         while ((ch = getopt(argc, argv, "cdsu")) != -1)
 101                 switch((char)ch) {
 102                 case 'c':
 103                         cflag = 1;
 104                         break;
 105                 case 'd':
 106                         dflag = 1;
 107                         break;
 108                 case 's':
 109                         sflag = 1;
 110                         break;
 111                 case 'u':
 112                         setbuf(stdout, (char *)NULL);
 113                         break;
 114                 case '?':
 115                 default:
 116                         usage();
 117                 }
 118         argc -= optind;
 119         argv += optind;
 120
 121         switch(argc) {
 122         case 0:
 123         default:
 124                 usage();
 125                 /* NOTREACHED */
 126         case 1:
 127                 isstring2 = 0;
 128                 break;
 129         case 2:
 130                 isstring2 = 1;
 131                 break;
 132         }
 133
 134         /*
 135          * tr -ds [-c] string1 string2
 136          * Delete all characters (or complemented characters) in string1.
 137          * Squeeze all characters in string2.
 138          */
 139         if (dflag && sflag) {
 140                 if (!isstring2)
 141                         usage();
 142
 143                 setup(string1, argv[0], &s1, cflag);
 144                 setup(string2, argv[1], &s2, 0);
 145
 146                 for (lastch = OOBCH; (ch = getchar()) != EOF;)
 147                         if (!string1[ch] && (!string2[ch] || lastch != ch)) {
 148                                 lastch = ch;
 149                                 (void)putchar(ch);
 150                         }
 151                 exit(0);
 152         }
 153
 154         /*
 155          * tr -d [-c] string1
 156          * Delete all characters (or complemented characters) in string1.
 157          */
 158         if (dflag) {
 159                 if (isstring2)
 160                         usage();
 161
 162                 setup(string1, argv[0], &s1, cflag);
 163
 164                 while ((ch = getchar()) != EOF)
 165                         if (!string1[ch])
 166                                 (void)putchar(ch);
 167                 exit(0);
 168         }
 169
 170         /*
 171          * tr -s [-c] string1
 172          * Squeeze all characters (or complemented characters) in string1.
 173          */
 174         if (sflag && !isstring2) {
 175                 setup(string1, argv[0], &s1, cflag);
 176
 177                 for (lastch = OOBCH; (ch = getchar()) != EOF;)
 178                         if (!string1[ch] || lastch != ch) {
 179                                 lastch = ch;
 180                                 (void)putchar(ch);
 181                         }
 182                 exit(0);
 183         }
 184
 185         /*
 186          * tr [-cs] string1 string2
 187          * Replace all characters (or complemented characters) in string1 with
 188          * the character in the same position in string2.  If the -s option is
 189          * specified, squeeze all the characters in string2.
 190          */
 191         if (!isstring2)
 192                 usage();
 193
 194         s1.str = argv[0];
 195         s2.str = argv[1];
 196
 197         if (cflag)
 198                 for (cnt = NCHARS, p = string1; cnt--;)
 199                         *p++ = OOBCH;
 200
 201         if (!next(&s2))
 202                 errx(1, "empty string2");
 203
 204         ch = s2.lastch;
 205         /* If string2 runs out of characters, use the last one specified. */
 206         if (sflag)
 207                 while (next(&s1)) {
 208                         string1[s1.lastch] = ch = s2.lastch;
 209                         string2[ch] = 1;
 210                         (void)next(&s2);
 211                 }
 212         else
 213                 while (next(&s1)) {
 214                         string1[s1.lastch] = ch = s2.lastch;
 215                         (void)next(&s2);
 216                 }
 217
 218         if (cflag)
 219                 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
 220                         *p = *p == OOBCH ? ch : cnt;
 221
 222         if (sflag)
 223                 for (lastch = OOBCH; (ch = getchar()) != EOF;) {
 224                         ch = string1[ch];
 225                         if (!string2[ch] || lastch != ch) {
 226                                 lastch = ch;
 227                                 (void)putchar(ch);
 228                         }
 229                 }
 230         else
 231                 while ((ch = getchar()) != EOF)
 232                         (void)putchar(string1[ch]);
 233         exit (0);
 234 }
 235
 236 static void
 237 setup(int *string, char *arg, STR *str, int cflag)
 238 {
 239         int cnt, *p;
 240
 241         str->str = arg;
 242         bzero(string, NCHARS * sizeof(int));
 243         while (next(str))
 244                 string[str->lastch] = 1;
 245         if (cflag)
 246                 for (p = string, cnt = NCHARS; cnt--; ++p)
 247                         *p = !*p;
 248 }
 249
 250 static void
 251 usage(void)
 252 {
 253         (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
 254                 "usage: tr [-csu] string1 string2",
 255                 "       tr [-cu] -d string1",
 256                 "       tr [-cu] -s string1",
 257                 "       tr [-cu] -ds string1 string2");
 258         exit(1);
 259 }