freebsd-skq/usr.bin/tr/tr.c

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/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
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#ifndef lint
static const char copyright[] =
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"@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
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#ifndef lint
static const char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95";
#endif
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#include <sys/types.h>
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#include <ctype.h>
#include <err.h>
#include <locale.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
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#include "extern.h"
/*
* For -C option: determine whether a byte is a valid character in the
* current character set (as defined by LC_CTYPE).
*/
#define ISCHAR(c) (iscntrl(c) || isprint(c))
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static int string1[NCHARS] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
}, string2[NCHARS];
STR s1 = { STRING1, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
STR s2 = { STRING2, NORMAL, 0, OOBCH, { 0, OOBCH }, NULL, NULL };
static void setup(int *, char *, STR *, int, int);
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static void usage(void);
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int
main(int argc, char **argv)
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{
static int collorder[NCHARS], tmpmap[NCHARS];
int ch, cnt, lastch, *p;
int Cflag, cflag, dflag, sflag, isstring2;
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(void)setlocale(LC_ALL, "");
Cflag = cflag = dflag = sflag = 0;
while ((ch = getopt(argc, argv, "Ccdsu")) != -1)
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switch((char)ch) {
case 'C':
Cflag = 1;
cflag = 0;
break;
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case 'c':
cflag = 1;
Cflag = 0;
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break;
case 'd':
dflag = 1;
break;
case 's':
sflag = 1;
break;
case 'u':
setbuf(stdout, (char *)NULL);
break;
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case '?':
default:
usage();
}
argc -= optind;
argv += optind;
switch(argc) {
case 0:
default:
usage();
/* NOTREACHED */
case 1:
isstring2 = 0;
break;
case 2:
isstring2 = 1;
break;
}
/*
* tr -ds [-Cc] string1 string2
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* Delete all characters (or complemented characters) in string1.
* Squeeze all characters in string2.
*/
if (dflag && sflag) {
if (!isstring2)
usage();
setup(string1, argv[0], &s1, cflag, Cflag);
setup(string2, argv[1], &s2, 0, 0);
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for (lastch = OOBCH; (ch = getchar()) != EOF;)
if (!string1[ch] && (!string2[ch] || lastch != ch)) {
lastch = ch;
(void)putchar(ch);
}
exit(0);
}
/*
* tr -d [-Cc] string1
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* Delete all characters (or complemented characters) in string1.
*/
if (dflag) {
if (isstring2)
usage();
setup(string1, argv[0], &s1, cflag, Cflag);
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while ((ch = getchar()) != EOF)
if (!string1[ch])
(void)putchar(ch);
exit(0);
}
/*
* tr -s [-Cc] string1
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* Squeeze all characters (or complemented characters) in string1.
*/
if (sflag && !isstring2) {
setup(string1, argv[0], &s1, cflag, Cflag);
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for (lastch = OOBCH; (ch = getchar()) != EOF;)
if (!string1[ch] || lastch != ch) {
lastch = ch;
(void)putchar(ch);
}
exit(0);
}
/*
* tr [-Ccs] string1 string2
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* Replace all characters (or complemented characters) in string1 with
* the character in the same position in string2. If the -s option is
* specified, squeeze all the characters in string2.
*/
if (!isstring2)
usage();
s1.str = argv[0];
s2.str = argv[1];
if (cflag || Cflag)
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for (cnt = NCHARS, p = string1; cnt--;)
*p++ = OOBCH;
if (!next(&s2))
errx(1, "empty string2");
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/*
* For -s result will contain only those characters defined
* as the second characters in each of the toupper or tolower
* pairs.
*/
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/* If string2 runs out of characters, use the last one specified. */
while (next(&s1)) {
again:
if (s1.state == SET_LOWER &&
s2.state == SET_UPPER &&
s1.cnt == 1 && s2.cnt == 1) {
do {
string1[s1.lastch] = ch = toupper(s1.lastch);
if (sflag && isupper(ch))
string2[ch] = 1;
if (!next(&s1))
goto endloop;
} while (s1.state == SET_LOWER && s1.cnt > 1);
/* skip upper set */
do {
if (!next(&s2))
break;
} while (s2.state == SET_UPPER && s2.cnt > 1);
goto again;
} else if (s1.state == SET_UPPER &&
s2.state == SET_LOWER &&
s1.cnt == 1 && s2.cnt == 1) {
do {
string1[s1.lastch] = ch = tolower(s1.lastch);
if (sflag && islower(ch))
string2[ch] = 1;
if (!next(&s1))
goto endloop;
} while (s1.state == SET_UPPER && s1.cnt > 1);
/* skip lower set */
do {
if (!next(&s2))
break;
} while (s2.state == SET_LOWER && s2.cnt > 1);
goto again;
} else {
string1[s1.lastch] = s2.lastch;
if (sflag)
string2[s2.lastch] = 1;
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}
(void)next(&s2);
}
endloop:
if (cflag || Cflag) {
s2.str = argv[1];
s2.state = NORMAL;
for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt) {
if (*p == OOBCH && (!Cflag || ISCHAR(cnt))) {
(void)next(&s2);
*p = s2.lastch;
} else
*p = cnt;
}
}
if (Cflag) {
/*
* Generate a table for locale single-byte collating element
* ordering and use it to reorder string1 as required by
* IEEE Std. 1003.1-2001.
*/
for (ch = 0; ch < NCHARS; ch++)
collorder[ch] = ch;
mergesort(collorder, NCHARS, sizeof(*collorder), charcoll);
for (ch = 0; ch < NCHARS; ch++)
tmpmap[ch] = string1[collorder[ch]];
memcpy(string1, tmpmap, sizeof(tmpmap));
}
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if (sflag)
for (lastch = OOBCH; (ch = getchar()) != EOF;) {
ch = string1[ch];
if (!string2[ch] || lastch != ch) {
lastch = ch;
(void)putchar(ch);
}
}
else
while ((ch = getchar()) != EOF)
(void)putchar(string1[ch]);
exit (0);
}
static void
setup(int *string, char *arg, STR *str, int cflag, int Cflag)
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{
int cnt, *p;
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str->str = arg;
bzero(string, NCHARS * sizeof(int));
while (next(str))
string[str->lastch] = 1;
if (cflag)
for (p = string, cnt = NCHARS; cnt--; ++p)
*p = !*p;
else if (Cflag)
for (cnt = 0; cnt < NCHARS; cnt++)
string[cnt] = !string[cnt] && ISCHAR(cnt);
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}
int
charcoll(const void *a, const void *b)
{
static char sa[2], sb[2];
sa[0] = *(const int *)a;
sb[0] = *(const int *)b;
return (strcoll(sa, sb));
}
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static void
usage(void)
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{
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: tr [-Ccsu] string1 string2",
" tr [-Ccu] -d string1",
" tr [-Ccu] -s string1",
" tr [-Ccu] -ds string1 string2");
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exit(1);
}