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tr.c revision 1.1.1.3 
      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 
     34 #ifndef lint
     35 static char copyright[] =
     36 "@(#) Copyright (c) 1988, 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)tr.c	8.2 (Berkeley) 5/4/95";
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <unistd.h>
     50 
     51 #include "extern.h"
     52 
     53 static int string1[NCHARS] = {
     54 	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,		/* ASCII */
     55 	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
     56 	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
     57 	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
     58 	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
     59 	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
     60 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
     61 	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
     62 	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
     63 	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
     64 	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
     65 	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
     66 	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
     67 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
     68 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
     69 	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
     70 	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
     71 	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
     72 	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
     73 	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
     74 	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
     75 	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
     76 	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
     77 	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
     78 	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
     79 	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
     80 	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
     81 	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
     82 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
     83 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
     84 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
     85 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
     86 }, string2[NCHARS];
     87 
     88 STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
     89 STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
     90 
     91 static void setup __P((int *, char *, STR *, int));
     92 static void usage __P((void));
     93 
     94 int
     95 main(argc, argv)
     96 	int argc;
     97 	char **argv;
     98 {
     99 	register int ch, cnt, lastch, *p;
    100 	int cflag, dflag, sflag, isstring2;
    101 
    102 	cflag = dflag = sflag = 0;
    103 	while ((ch = getopt(argc, argv, "cds")) != EOF)
    104 		switch((char)ch) {
    105 		case 'c':
    106 			cflag = 1;
    107 			break;
    108 		case 'd':
    109 			dflag = 1;
    110 			break;
    111 		case 's':
    112 			sflag = 1;
    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 		err("empty string2");
    203 
    204 	/* If string2 runs out of characters, use the last one specified. */
    205 	if (sflag)
    206 		while (next(&s1)) {
    207 			string1[s1.lastch] = ch = s2.lastch;
    208 			string2[ch] = 1;
    209 			(void)next(&s2);
    210 		}
    211 	else
    212 		while (next(&s1)) {
    213 			string1[s1.lastch] = ch = s2.lastch;
    214 			(void)next(&s2);
    215 		}
    216 
    217 	if (cflag)
    218 		for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
    219 			*p = *p == OOBCH ? ch : cnt;
    220 
    221 	if (sflag)
    222 		for (lastch = OOBCH; (ch = getchar()) != EOF;) {
    223 			ch = string1[ch];
    224 			if (!string2[ch] || lastch != ch) {
    225 				lastch = ch;
    226 				(void)putchar(ch);
    227 			}
    228 		}
    229 	else
    230 		while ((ch = getchar()) != EOF)
    231 			(void)putchar(string1[ch]);
    232 	exit (0);
    233 }
    234 
    235 static void
    236 setup(string, arg, str, cflag)
    237 	int *string;
    238 	char *arg;
    239 	STR *str;
    240 	int cflag;
    241 {
    242 	register int cnt, *p;
    243 
    244 	str->str = arg;
    245 	bzero(string, NCHARS * sizeof(int));
    246 	while (next(str))
    247 		string[str->lastch] = 1;
    248 	if (cflag)
    249 		for (p = string, cnt = NCHARS; cnt--; ++p)
    250 			*p = !*p;
    251 }
    252 
    253 static void
    254 usage()
    255 {
    256 	(void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
    257 	(void)fprintf(stderr, "       tr [-c] -d string1\n");
    258 	(void)fprintf(stderr, "       tr [-c] -s string1\n");
    259 	(void)fprintf(stderr, "       tr [-c] -ds string1 string2\n");
    260 	exit(1);
    261 }
    262 
    263 #if __STDC__
    264 #include <stdarg.h>
    265 #else
    266 #include <varargs.h>
    267 #endif
    268 
    269 void
    270 #if __STDC__
    271 err(const char *fmt, ...)
    272 #else
    273 err(fmt, va_alist)
    274 	char *fmt;
    275         va_dcl
    276 #endif
    277 {
    278 	va_list ap;
    279 #if __STDC__
    280 	va_start(ap, fmt);
    281 #else
    282 	va_start(ap);
    283 #endif
    284 	(void)fprintf(stderr, "tr: ");
    285 	(void)vfprintf(stderr, fmt, ap);
    286 	va_end(ap);
    287 	(void)fprintf(stderr, "\n");
    288 	exit(1);
    289 	/* NOTREACHED */
    290 }
    291