Home | History | Annotate | Line # | Download | only in tr
tr.c revision 1.2 
      1 /*
      2  * Copyright (c) 1988 The Regents of the University of California.
      3  * 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 char copyright[] =
     36 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)tr.c	5.4 (Berkeley) 3/3/93";
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <string.h>
     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 __P((int *, char *, STR *, int));
     89 static void usage __P((void));
     90 
     91 int
     92 main(argc, argv)
     93 	int argc;
     94 	char **argv;
     95 {
     96 	register int ch, cnt, lastch, *p;
     97 	int cflag, dflag, sflag, isstring2;
     98 
     99 	cflag = dflag = sflag = 0;
    100 	while ((ch = getopt(argc, argv, "cds")) != EOF)
    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 '?':
    112 		default:
    113 			usage();
    114 		}
    115 	argc -= optind;
    116 	argv += optind;
    117 
    118 	switch(argc) {
    119 	case 0:
    120 	default:
    121 		usage();
    122 		/* NOTREACHED */
    123 	case 1:
    124 		isstring2 = 0;
    125 		break;
    126 	case 2:
    127 		isstring2 = 1;
    128 		break;
    129 	}
    130 
    131 	/*
    132 	 * tr -ds [-c] string1 string2
    133 	 * Delete all characters (or complemented characters) in string1.
    134 	 * Squeeze all characters in string2.
    135 	 */
    136 	if (dflag && sflag) {
    137 		if (!isstring2)
    138 			usage();
    139 
    140 		setup(string1, argv[0], &s1, cflag);
    141 		setup(string2, argv[1], &s2, 0);
    142 
    143 		for (lastch = OOBCH; (ch = getchar()) != EOF;)
    144 			if (!string1[ch] && (!string2[ch] || lastch != ch)) {
    145 				lastch = ch;
    146 				(void)putchar(ch);
    147 			}
    148 		exit(0);
    149 	}
    150 
    151 	/*
    152 	 * tr -d [-c] string1
    153 	 * Delete all characters (or complemented characters) in string1.
    154 	 */
    155 	if (dflag) {
    156 		if (isstring2)
    157 			usage();
    158 
    159 		setup(string1, argv[0], &s1, cflag);
    160 
    161 		while ((ch = getchar()) != EOF)
    162 			if (!string1[ch])
    163 				(void)putchar(ch);
    164 		exit(0);
    165 	}
    166 
    167 	/*
    168 	 * tr -s [-c] string1
    169 	 * Squeeze all characters (or complemented characters) in string1.
    170 	 */
    171 	if (sflag && !isstring2) {
    172 		setup(string1, argv[0], &s1, cflag);
    173 
    174 		for (lastch = OOBCH; (ch = getchar()) != EOF;)
    175 			if (!string1[ch] || lastch != ch) {
    176 				lastch = ch;
    177 				(void)putchar(ch);
    178 			}
    179 		exit(0);
    180 	}
    181 
    182 	/*
    183 	 * tr [-cs] string1 string2
    184 	 * Replace all characters (or complemented characters) in string1 with
    185 	 * the character in the same position in string2.  If the -s option is
    186 	 * specified, squeeze all the characters in string2.
    187 	 */
    188 	if (!isstring2)
    189 		usage();
    190 
    191 	s1.str = argv[0];
    192 	s2.str = argv[1];
    193 
    194 	if (cflag)
    195 		for (cnt = NCHARS, p = string1; cnt--;)
    196 			*p++ = OOBCH;
    197 
    198 	if (!next(&s2))
    199 		err("empty string2");
    200 
    201 	/* If string2 runs out of characters, use the last one specified. */
    202 	if (sflag)
    203 		while (next(&s1)) {
    204 			string1[s1.lastch] = ch = s2.lastch;
    205 			string2[ch] = 1;
    206 			(void)next(&s2);
    207 		}
    208 	else
    209 		while (next(&s1)) {
    210 			string1[s1.lastch] = ch = s2.lastch;
    211 			(void)next(&s2);
    212 		}
    213 
    214 	if (cflag)
    215 		for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
    216 			*p = *p == OOBCH ? ch : cnt;
    217 
    218 	if (sflag)
    219 		for (lastch = OOBCH; (ch = getchar()) != EOF;) {
    220 			ch = string1[ch];
    221 			if (!string2[ch] || lastch != ch) {
    222 				lastch = ch;
    223 				(void)putchar(ch);
    224 			}
    225 		}
    226 	else
    227 		while ((ch = getchar()) != EOF)
    228 			(void)putchar(string1[ch]);
    229 	exit (0);
    230 }
    231 
    232 static void
    233 setup(string, arg, str, cflag)
    234 	int *string;
    235 	char *arg;
    236 	STR *str;
    237 	int cflag;
    238 {
    239 	register 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()
    252 {
    253 	(void)fprintf(stderr, "usage: tr [-cs] string1 string2\n");
    254 	(void)fprintf(stderr, "       tr [-c] -d string1\n");
    255 	(void)fprintf(stderr, "       tr [-c] -s string1\n");
    256 	(void)fprintf(stderr, "       tr [-c] -ds string1 string2\n");
    257 	exit(1);
    258 }
    259 
    260 #if __STDC__
    261 #include <stdarg.h>
    262 #else
    263 #include <varargs.h>
    264 #endif
    265 
    266 void
    267 #if __STDC__
    268 err(const char *fmt, ...)
    269 #else
    270 err(fmt, va_alist)
    271 	char *fmt;
    272         va_dcl
    273 #endif
    274 {
    275 	va_list ap;
    276 #if __STDC__
    277 	va_start(ap, fmt);
    278 #else
    279 	va_start(ap);
    280 #endif
    281 	(void)fprintf(stderr, "tr: ");
    282 	(void)vfprintf(stderr, fmt, ap);
    283 	va_end(ap);
    284 	(void)fprintf(stderr, "\n");
    285 	exit(1);
    286 	/* NOTREACHED */
    287 }
    288