commands/simple/tr.c

   1 /*      $NetBSD: tr.c,v 1.8 2008/07/21 14:19:27 lukem 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 1.8 2008/07/21 14:19:27 lukem 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 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
  91 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
  92
  93 int     main __P((int, char **));
  94 static void setup __P((int *, char *, STR *, int));
  95 static void usage __P((void));
  96
  97 int
  98 main(argc, argv)
  99         int argc;
 100         char **argv;
 101 {
 102         int ch, cnt, lastch, *p;
 103         int cflag, dflag, sflag, isstring2;
 104
 105         cflag = dflag = sflag = 0;
 106         while ((ch = getopt(argc, argv, "cds")) != -1)
 107                 switch((char)ch) {
 108                 case 'c':
 109                         cflag = 1;
 110                         break;
 111                 case 'd':
 112                         dflag = 1;
 113                         break;
 114                 case 's':
 115                         sflag = 1;
 116                         break;
 117                 case '?':
 118                 default:
 119                         usage();
 120                 }
 121         argc -= optind;
 122         argv += optind;
 123
 124         switch(argc) {
 125         case 0:
 126         default:
 127                 usage();
 128                 /* NOTREACHED */
 129         case 1:
 130                 isstring2 = 0;
 131                 break;
 132         case 2:
 133                 isstring2 = 1;
 134                 break;
 135         }
 136
 137         /*
 138          * tr -ds [-c] string1 string2
 139          * Delete all characters (or complemented characters) in string1.
 140          * Squeeze all characters in string2.
 141          */
 142         if (dflag && sflag) {
 143                 if (!isstring2)
 144                         usage();
 145
 146                 setup(string1, argv[0], &s1, cflag);
 147                 setup(string2, argv[1], &s2, 0);
 148
 149                 for (lastch = OOBCH; (ch = getchar()) != EOF;)
 150                         if (!string1[ch] && (!string2[ch] || lastch != ch)) {
 151                                 lastch = ch;
 152                                 (void)putchar(ch);
 153                         }
 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                 exit(0);
 171         }
 172
 173         /*
 174          * tr -s [-c] string1
 175          * Squeeze all characters (or complemented characters) in string1.
 176          */
 177         if (sflag && !isstring2) {
 178                 setup(string1, argv[0], &s1, cflag);
 179
 180                 for (lastch = OOBCH; (ch = getchar()) != EOF;)
 181                         if (!string1[ch] || lastch != ch) {
 182                                 lastch = ch;
 183                                 (void)putchar(ch);
 184                         }
 185                 exit(0);
 186         }
 187
 188         /*
 189          * tr [-cs] string1 string2
 190          * Replace all characters (or complemented characters) in string1 with
 191          * the character in the same position in string2.  If the -s option is
 192          * specified, squeeze all the characters in string2.
 193          */
 194         if (!isstring2)
 195                 usage();
 196
 197         s1.str = argv[0];
 198         s2.str = argv[1];
 199
 200         if (cflag)
 201                 for (cnt = NCHARS, p = string1; cnt--;)
 202                         *p++ = OOBCH;
 203
 204         if (!next(&s2))
 205                 errx(1, "empty string2");
 206
 207         /* If string2 runs out of characters, use the last one specified. */
 208         if (sflag)
 209                 while (next(&s1)) {
 210                         string1[s1.lastch] = ch = s2.lastch;
 211                         string2[ch] = 1;
 212                         (void)next(&s2);
 213                 }
 214         else
 215                 while (next(&s1)) {
 216                         string1[s1.lastch] = ch = s2.lastch;
 217                         (void)next(&s2);
 218                 }
 219
 220         if (cflag)
 221                 for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
 222                         *p = *p == OOBCH ? ch : cnt;
 223
 224         if (sflag)
 225                 for (lastch = OOBCH; (ch = getchar()) != EOF;) {
 226                         ch = string1[ch];
 227                         if (!string2[ch] || lastch != ch) {
 228                                 lastch = ch;
 229                                 (void)putchar(ch);
 230                         }
 231                 }
 232         else
 233                 while ((ch = getchar()) != EOF)
 234                         (void)putchar(string1[ch]);
 235         exit (0);
 236 }
 237
 238 static void
 239 setup(string, arg, str, cflag)
 240         int *string;
 241         char *arg;
 242         STR *str;
 243         int cflag;
 244 {
 245         int cnt, *p;
 246
 247         str->str = arg;
 248         memset(string, 0, NCHARS * sizeof(int));
 249         while (next(str))
 250                 string[str->lastch] = 1;
 251         if (cflag)
 252                 for (p = string, cnt = NCHARS; cnt--; ++p)
 253                         *p = !*p;
 254 }
 255
 256 static void
 257 usage()
 258 {
 259         (void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
 260         (void)fprintf(stderr, "       tr [-c] -d string1\n");
 261         (void)fprintf(stderr, "       tr [-c] -s string1\n");
 262         (void)fprintf(stderr, "       tr [-c] -ds string1 string2\n");
 263         exit(1);
 264 }