/*
* 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. 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("$FreeBSD$");
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
static const char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95";
#endif
#include <sys/types.h>
#include <sys/capsicum.h>
#include <capsicum_helpers.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <locale.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#include "cmap.h"
#include "cset.h"
#include "extern.h"
static STR s1 = { STRING1, NORMAL, 0, OOBCH, 0, { 0, OOBCH }, NULL, NULL };
static STR s2 = { STRING2, NORMAL, 0, OOBCH, 0, { 0, OOBCH }, NULL, NULL };
static struct cset *setup(char *, STR *, int, int);
static void usage(void);
int
main(int argc, char **argv)
{
static int carray[NCHARS_SB];
struct cmap *map;
struct cset *delete, *squeeze;
int n, *p;
int Cflag, cflag, dflag, sflag, isstring2;
wint_t ch, cnt, lastch;
(void)setlocale(LC_ALL, "");
if (caph_limit_stdio() == -1)
err(1, "unable to limit stdio");
if (cap_enter() < 0 && errno != ENOSYS)
err(1, "unable to enter capability mode");
Cflag = cflag = dflag = sflag = 0;
while ((ch = getopt(argc, argv, "Ccdsu")) != -1)
switch((char)ch) {
case 'C':
Cflag = 1;
cflag = 0;
break;
case 'c':
cflag = 1;
Cflag = 0;
break;
case 'd':
dflag = 1;
break;
case 's':
sflag = 1;
break;
case 'u':
setbuf(stdout, (char *)NULL);
break;
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
* Delete all characters (or complemented characters) in string1.
* Squeeze all characters in string2.
*/
if (dflag && sflag) {
if (!isstring2)
usage();
delete = setup(argv[0], &s1, cflag, Cflag);
squeeze = setup(argv[1], &s2, 0, 0);
for (lastch = OOBCH; (ch = getwchar()) != WEOF;)
if (!cset_in(delete, ch) &&
(lastch != ch || !cset_in(squeeze, ch))) {
lastch = ch;
(void)putwchar(ch);
}
if (ferror(stdin))
err(1, NULL);
exit(0);
}
/*
* tr -d [-Cc] string1
* Delete all characters (or complemented characters) in string1.
*/
if (dflag) {
if (isstring2)
usage();
delete = setup(argv[0], &s1, cflag, Cflag);
while ((ch = getwchar()) != WEOF)
if (!cset_in(delete, ch))
(void)putwchar(ch);
if (ferror(stdin))
err(1, NULL);
exit(0);
}
/*
* tr -s [-Cc] string1
* Squeeze all characters (or complemented characters) in string1.
*/
if (sflag && !isstring2) {
squeeze = setup(argv[0], &s1, cflag, Cflag);
for (lastch = OOBCH; (ch = getwchar()) != WEOF;)
if (lastch != ch || !cset_in(squeeze, ch)) {
lastch = ch;
(void)putwchar(ch);
}
if (ferror(stdin))
err(1, NULL);
exit(0);
}
/*
* tr [-Ccs] string1 string2
* 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();
map = cmap_alloc();
if (map == NULL)
err(1, NULL);
squeeze = cset_alloc();
if (squeeze == NULL)
err(1, NULL);
s1.str = argv[0];
if (Cflag || cflag) {
cmap_default(map, OOBCH);
if ((s2.str = strdup(argv[1])) == NULL)
errx(1, "strdup(argv[1])");
} else
s2.str = argv[1];
if (!next(&s2))
errx(1, "empty string2");
/*
* For -s result will contain only those characters defined
* as the second characters in each of the toupper or tolower
* pairs.
*/
/* If string2 runs out of characters, use the last one specified. */
while (next(&s1)) {
again:
if (s1.state == CCLASS_LOWER &&
s2.state == CCLASS_UPPER &&
s1.cnt == 1 && s2.cnt == 1) {
do {
ch = towupper(s1.lastch);
cmap_add(map, s1.lastch, ch);
if (sflag && iswupper(ch))
cset_add(squeeze, ch);
if (!next(&s1))
goto endloop;
} while (s1.state == CCLASS_LOWER && s1.cnt > 1);
/* skip upper set */
do {
if (!next(&s2))
break;
} while (s2.state == CCLASS_UPPER && s2.cnt > 1);
goto again;
} else if (s1.state == CCLASS_UPPER &&
s2.state == CCLASS_LOWER &&
s1.cnt == 1 && s2.cnt == 1) {
do {
ch = towlower(s1.lastch);
cmap_add(map, s1.lastch, ch);
if (sflag && iswlower(ch))
cset_add(squeeze, ch);
if (!next(&s1))
goto endloop;
} while (s1.state == CCLASS_UPPER && s1.cnt > 1);
/* skip lower set */
do {
if (!next(&s2))
break;
} while (s2.state == CCLASS_LOWER && s2.cnt > 1);
goto again;
} else {
cmap_add(map, s1.lastch, s2.lastch);
if (sflag)
cset_add(squeeze, s2.lastch);
}
(void)next(&s2);
}
endloop:
if (cflag || (Cflag && MB_CUR_MAX > 1)) {
/*
* This is somewhat tricky: since the character set is
* potentially huge, we need to avoid allocating a map
* entry for every character. Our strategy is to set the
* default mapping to the last character of string #2
* (= the one that gets automatically repeated), then to
* add back identity mappings for characters that should
* remain unchanged. We don't waste space on identity mappings
* for non-characters with the -C option; those are simulated
* in the I/O loop.
*/
s2.str = argv[1];
s2.state = NORMAL;
for (cnt = 0; cnt < WINT_MAX; cnt++) {
if (Cflag && !iswrune(cnt))
continue;
if (cmap_lookup(map, cnt) == OOBCH) {
if (next(&s2)) {
cmap_add(map, cnt, s2.lastch);
if (sflag)
cset_add(squeeze, s2.lastch);
}
} else
cmap_add(map, cnt, cnt);
if ((s2.state == EOS || s2.state == INFINITE) &&
cnt >= cmap_max(map))
break;
}
cmap_default(map, s2.lastch);
} else if (Cflag) {
for (p = carray, cnt = 0; cnt < NCHARS_SB; cnt++) {
if (cmap_lookup(map, cnt) == OOBCH && iswrune(cnt))
*p++ = cnt;
else
cmap_add(map, cnt, cnt);
}
n = p - carray;
if (Cflag && n > 1)
(void)mergesort(carray, n, sizeof(*carray), charcoll);
s2.str = argv[1];
s2.state = NORMAL;
for (cnt = 0; cnt < n; cnt++) {
(void)next(&s2);
cmap_add(map, carray[cnt], s2.lastch);
/*
* Chars taken from s2 can be different this time
* due to lack of complex upper/lower processing,
* so fill string2 again to not miss some.
*/
if (sflag)
cset_add(squeeze, s2.lastch);
}
}
cset_cache(squeeze);
cmap_cache(map);
if (sflag)
for (lastch = OOBCH; (ch = getwchar()) != WEOF;) {
if (!Cflag || iswrune(ch))
ch = cmap_lookup(map, ch);
if (lastch != ch || !cset_in(squeeze, ch)) {
lastch = ch;
(void)putwchar(ch);
}
}
else
while ((ch = getwchar()) != WEOF) {
if (!Cflag || iswrune(ch))
ch = cmap_lookup(map, ch);
(void)putwchar(ch);
}
if (ferror(stdin))
err(1, NULL);
exit (0);
}
static struct cset *
setup(char *arg, STR *str, int cflag, int Cflag)
{
struct cset *cs;
cs = cset_alloc();
if (cs == NULL)
err(1, NULL);
str->str = arg;
while (next(str))
cset_add(cs, str->lastch);
if (Cflag)
cset_addclass(cs, wctype("rune"), true);
if (cflag || Cflag)
cset_invert(cs);
cset_cache(cs);
return (cs);
}
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));
}
static void
usage(void)
{
(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");
exit(1);
}
