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tr.c revision 1.5 
      1 /*	$NetBSD: tr.c,v 1.5 1995/08/31 22:13:48 jtc 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 static char copyright[] =
     38 "@(#) Copyright (c) 1988, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n";
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)tr.c	8.2 (Berkeley) 5/4/95";
     45 #endif
     46 static char rcsid[] = "$NetBSD: tr.c,v 1.5 1995/08/31 22:13:48 jtc Exp $";
     47 #endif /* not lint */
     48 
     49 #include <sys/types.h>
     50 
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <string.h>
     54 #include <unistd.h>
     55 
     56 #include "extern.h"
     57 
     58 static int string1[NCHARS] = {
     59 	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,		/* ASCII */
     60 	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
     61 	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
     62 	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
     63 	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
     64 	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
     65 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
     66 	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
     67 	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
     68 	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
     69 	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
     70 	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
     71 	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
     72 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
     73 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
     74 	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
     75 	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
     76 	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
     77 	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
     78 	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
     79 	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
     80 	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
     81 	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
     82 	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
     83 	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
     84 	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
     85 	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
     86 	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
     87 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
     88 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
     89 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
     90 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
     91 }, string2[NCHARS];
     92 
     93 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
     94 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
     95 
     96 static void setup __P((int *, char *, STR *, int));
     97 static void usage __P((void));
     98 
     99 int
    100 main(argc, argv)
    101 	int argc;
    102 	char **argv;
    103 {
    104 	register int ch, cnt, lastch, *p;
    105 	int cflag, dflag, sflag, isstring2;
    106 
    107 	cflag = dflag = sflag = 0;
    108 	while ((ch = getopt(argc, argv, "cds")) != EOF)
    109 		switch((char)ch) {
    110 		case 'c':
    111 			cflag = 1;
    112 			break;
    113 		case 'd':
    114 			dflag = 1;
    115 			break;
    116 		case 's':
    117 			sflag = 1;
    118 			break;
    119 		case '?':
    120 		default:
    121 			usage();
    122 		}
    123 	argc -= optind;
    124 	argv += optind;
    125 
    126 	switch(argc) {
    127 	case 0:
    128 	default:
    129 		usage();
    130 		/* NOTREACHED */
    131 	case 1:
    132 		isstring2 = 0;
    133 		break;
    134 	case 2:
    135 		isstring2 = 1;
    136 		break;
    137 	}
    138 
    139 	/*
    140 	 * tr -ds [-c] string1 string2
    141 	 * Delete all characters (or complemented characters) in string1.
    142 	 * Squeeze all characters in string2.
    143 	 */
    144 	if (dflag && sflag) {
    145 		if (!isstring2)
    146 			usage();
    147 
    148 		setup(string1, argv[0], &s1, cflag);
    149 		setup(string2, argv[1], &s2, 0);
    150 
    151 		for (lastch = OOBCH; (ch = getchar()) != EOF;)
    152 			if (!string1[ch] && (!string2[ch] || lastch != ch)) {
    153 				lastch = ch;
    154 				(void)putchar(ch);
    155 			}
    156 		exit(0);
    157 	}
    158 
    159 	/*
    160 	 * tr -d [-c] string1
    161 	 * Delete all characters (or complemented characters) in string1.
    162 	 */
    163 	if (dflag) {
    164 		if (isstring2)
    165 			usage();
    166 
    167 		setup(string1, argv[0], &s1, cflag);
    168 
    169 		while ((ch = getchar()) != EOF)
    170 			if (!string1[ch])
    171 				(void)putchar(ch);
    172 		exit(0);
    173 	}
    174 
    175 	/*
    176 	 * tr -s [-c] string1
    177 	 * Squeeze all characters (or complemented characters) in string1.
    178 	 */
    179 	if (sflag && !isstring2) {
    180 		setup(string1, argv[0], &s1, cflag);
    181 
    182 		for (lastch = OOBCH; (ch = getchar()) != EOF;)
    183 			if (!string1[ch] || lastch != ch) {
    184 				lastch = ch;
    185 				(void)putchar(ch);
    186 			}
    187 		exit(0);
    188 	}
    189 
    190 	/*
    191 	 * tr [-cs] string1 string2
    192 	 * Replace all characters (or complemented characters) in string1 with
    193 	 * the character in the same position in string2.  If the -s option is
    194 	 * specified, squeeze all the characters in string2.
    195 	 */
    196 	if (!isstring2)
    197 		usage();
    198 
    199 	s1.str = argv[0];
    200 	s2.str = argv[1];
    201 
    202 	if (cflag)
    203 		for (cnt = NCHARS, p = string1; cnt--;)
    204 			*p++ = OOBCH;
    205 
    206 	if (!next(&s2))
    207 		err("empty string2");
    208 
    209 	/* If string2 runs out of characters, use the last one specified. */
    210 	if (sflag)
    211 		while (next(&s1)) {
    212 			string1[s1.lastch] = ch = s2.lastch;
    213 			string2[ch] = 1;
    214 			(void)next(&s2);
    215 		}
    216 	else
    217 		while (next(&s1)) {
    218 			string1[s1.lastch] = ch = s2.lastch;
    219 			(void)next(&s2);
    220 		}
    221 
    222 	if (cflag)
    223 		for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
    224 			*p = *p == OOBCH ? ch : cnt;
    225 
    226 	if (sflag)
    227 		for (lastch = OOBCH; (ch = getchar()) != EOF;) {
    228 			ch = string1[ch];
    229 			if (!string2[ch] || lastch != ch) {
    230 				lastch = ch;
    231 				(void)putchar(ch);
    232 			}
    233 		}
    234 	else
    235 		while ((ch = getchar()) != EOF)
    236 			(void)putchar(string1[ch]);
    237 	exit (0);
    238 }
    239 
    240 static void
    241 setup(string, arg, str, cflag)
    242 	int *string;
    243 	char *arg;
    244 	STR *str;
    245 	int cflag;
    246 {
    247 	register int cnt, *p;
    248 
    249 	str->str = arg;
    250 	bzero(string, NCHARS * sizeof(int));
    251 	while (next(str))
    252 		string[str->lastch] = 1;
    253 	if (cflag)
    254 		for (p = string, cnt = NCHARS; cnt--; ++p)
    255 			*p = !*p;
    256 }
    257 
    258 static void
    259 usage()
    260 {
    261 	(void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
    262 	(void)fprintf(stderr, "       tr [-c] -d string1\n");
    263 	(void)fprintf(stderr, "       tr [-c] -s string1\n");
    264 	(void)fprintf(stderr, "       tr [-c] -ds string1 string2\n");
    265 	exit(1);
    266 }
    267 
    268 #if __STDC__
    269 #include <stdarg.h>
    270 #else
    271 #include <varargs.h>
    272 #endif
    273 
    274 void
    275 #if __STDC__
    276 err(const char *fmt, ...)
    277 #else
    278 err(fmt, va_alist)
    279 	char *fmt;
    280         va_dcl
    281 #endif
    282 {
    283 	va_list ap;
    284 #if __STDC__
    285 	va_start(ap, fmt);
    286 #else
    287 	va_start(ap);
    288 #endif
    289 	(void)fprintf(stderr, "tr: ");
    290 	(void)vfprintf(stderr, fmt, ap);
    291 	va_end(ap);
    292 	(void)fprintf(stderr, "\n");
    293 	exit(1);
    294 	/* NOTREACHED */
    295 }
    296