5b4fa425ba
Instead of changing the whole course to another POSIX-permitted way for consistency and uniformity I decide to completely ignore missing regex fucntionality and focus on fixing bugs in what we have now, too many small obstacles we have choicing other way, counting ports. Corresponding libc changes are backed out in r302824.
374 lines
8.9 KiB
C
374 lines
8.9 KiB
C
/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95";
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#endif
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "cmap.h"
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#include "cset.h"
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#include "extern.h"
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static STR s1 = { STRING1, NORMAL, 0, OOBCH, 0, { 0, OOBCH }, NULL, NULL };
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static STR s2 = { STRING2, NORMAL, 0, OOBCH, 0, { 0, OOBCH }, NULL, NULL };
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static struct cset *setup(char *, STR *, int, int);
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static void usage(void);
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int
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main(int argc, char **argv)
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{
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static int carray[NCHARS_SB];
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struct cmap *map;
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struct cset *delete, *squeeze;
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int n, *p;
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int Cflag, cflag, dflag, sflag, isstring2;
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wint_t ch, cnt, lastch;
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(void)setlocale(LC_ALL, "");
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Cflag = cflag = dflag = sflag = 0;
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while ((ch = getopt(argc, argv, "Ccdsu")) != -1)
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switch((char)ch) {
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case 'C':
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Cflag = 1;
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cflag = 0;
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break;
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case 'c':
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cflag = 1;
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Cflag = 0;
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break;
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case 'd':
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dflag = 1;
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break;
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case 's':
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sflag = 1;
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break;
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case 'u':
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setbuf(stdout, (char *)NULL);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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switch(argc) {
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case 0:
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default:
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usage();
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/* NOTREACHED */
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case 1:
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isstring2 = 0;
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break;
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case 2:
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isstring2 = 1;
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break;
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}
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/*
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* tr -ds [-Cc] string1 string2
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* Delete all characters (or complemented characters) in string1.
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* Squeeze all characters in string2.
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*/
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if (dflag && sflag) {
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if (!isstring2)
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usage();
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delete = setup(argv[0], &s1, cflag, Cflag);
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squeeze = setup(argv[1], &s2, 0, 0);
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for (lastch = OOBCH; (ch = getwchar()) != WEOF;)
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if (!cset_in(delete, ch) &&
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(lastch != ch || !cset_in(squeeze, ch))) {
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lastch = ch;
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(void)putwchar(ch);
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}
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if (ferror(stdin))
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err(1, NULL);
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exit(0);
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}
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/*
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* tr -d [-Cc] string1
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* Delete all characters (or complemented characters) in string1.
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*/
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if (dflag) {
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if (isstring2)
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usage();
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delete = setup(argv[0], &s1, cflag, Cflag);
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while ((ch = getwchar()) != WEOF)
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if (!cset_in(delete, ch))
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(void)putwchar(ch);
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if (ferror(stdin))
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err(1, NULL);
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exit(0);
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}
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/*
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* tr -s [-Cc] string1
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* Squeeze all characters (or complemented characters) in string1.
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*/
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if (sflag && !isstring2) {
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squeeze = setup(argv[0], &s1, cflag, Cflag);
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for (lastch = OOBCH; (ch = getwchar()) != WEOF;)
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if (lastch != ch || !cset_in(squeeze, ch)) {
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lastch = ch;
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(void)putwchar(ch);
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}
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if (ferror(stdin))
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err(1, NULL);
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exit(0);
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}
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/*
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* tr [-Ccs] string1 string2
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* Replace all characters (or complemented characters) in string1 with
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* the character in the same position in string2. If the -s option is
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* specified, squeeze all the characters in string2.
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*/
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if (!isstring2)
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usage();
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map = cmap_alloc();
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if (map == NULL)
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err(1, NULL);
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squeeze = cset_alloc();
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if (squeeze == NULL)
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err(1, NULL);
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s1.str = argv[0];
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if (Cflag || cflag) {
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cmap_default(map, OOBCH);
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if ((s2.str = strdup(argv[1])) == NULL)
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errx(1, "strdup(argv[1])");
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} else
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s2.str = argv[1];
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if (!next(&s2))
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errx(1, "empty string2");
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/*
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* For -s result will contain only those characters defined
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* as the second characters in each of the toupper or tolower
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* pairs.
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*/
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/* If string2 runs out of characters, use the last one specified. */
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while (next(&s1)) {
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again:
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if (s1.state == CCLASS_LOWER &&
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s2.state == CCLASS_UPPER &&
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s1.cnt == 1 && s2.cnt == 1) {
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do {
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ch = towupper(s1.lastch);
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cmap_add(map, s1.lastch, ch);
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if (sflag && iswupper(ch))
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cset_add(squeeze, ch);
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if (!next(&s1))
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goto endloop;
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} while (s1.state == CCLASS_LOWER && s1.cnt > 1);
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/* skip upper set */
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do {
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if (!next(&s2))
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break;
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} while (s2.state == CCLASS_UPPER && s2.cnt > 1);
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goto again;
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} else if (s1.state == CCLASS_UPPER &&
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s2.state == CCLASS_LOWER &&
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s1.cnt == 1 && s2.cnt == 1) {
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do {
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ch = towlower(s1.lastch);
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cmap_add(map, s1.lastch, ch);
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if (sflag && iswlower(ch))
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cset_add(squeeze, ch);
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if (!next(&s1))
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goto endloop;
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} while (s1.state == CCLASS_UPPER && s1.cnt > 1);
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/* skip lower set */
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do {
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if (!next(&s2))
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break;
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} while (s2.state == CCLASS_LOWER && s2.cnt > 1);
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goto again;
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} else {
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cmap_add(map, s1.lastch, s2.lastch);
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if (sflag)
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cset_add(squeeze, s2.lastch);
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}
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(void)next(&s2);
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}
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endloop:
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if (cflag || (Cflag && MB_CUR_MAX > 1)) {
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/*
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* This is somewhat tricky: since the character set is
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* potentially huge, we need to avoid allocating a map
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* entry for every character. Our strategy is to set the
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* default mapping to the last character of string #2
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* (= the one that gets automatically repeated), then to
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* add back identity mappings for characters that should
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* remain unchanged. We don't waste space on identity mappings
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* for non-characters with the -C option; those are simulated
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* in the I/O loop.
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*/
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s2.str = argv[1];
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s2.state = NORMAL;
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for (cnt = 0; cnt < WINT_MAX; cnt++) {
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if (Cflag && !iswrune(cnt))
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continue;
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if (cmap_lookup(map, cnt) == OOBCH) {
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if (next(&s2))
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cmap_add(map, cnt, s2.lastch);
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if (sflag)
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cset_add(squeeze, s2.lastch);
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} else
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cmap_add(map, cnt, cnt);
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if ((s2.state == EOS || s2.state == INFINITE) &&
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cnt >= cmap_max(map))
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break;
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}
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cmap_default(map, s2.lastch);
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} else if (Cflag) {
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for (p = carray, cnt = 0; cnt < NCHARS_SB; cnt++) {
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if (cmap_lookup(map, cnt) == OOBCH && iswrune(cnt))
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*p++ = cnt;
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else
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cmap_add(map, cnt, cnt);
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}
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n = p - carray;
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if (Cflag && n > 1)
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(void)mergesort(carray, n, sizeof(*carray), charcoll);
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s2.str = argv[1];
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s2.state = NORMAL;
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for (cnt = 0; cnt < n; cnt++) {
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(void)next(&s2);
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cmap_add(map, carray[cnt], s2.lastch);
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/*
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* Chars taken from s2 can be different this time
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* due to lack of complex upper/lower processing,
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* so fill string2 again to not miss some.
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*/
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if (sflag)
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cset_add(squeeze, s2.lastch);
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}
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}
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cset_cache(squeeze);
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cmap_cache(map);
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if (sflag)
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for (lastch = OOBCH; (ch = getwchar()) != WEOF;) {
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if (!Cflag || iswrune(ch))
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ch = cmap_lookup(map, ch);
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if (lastch != ch || !cset_in(squeeze, ch)) {
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lastch = ch;
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(void)putwchar(ch);
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}
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}
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else
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while ((ch = getwchar()) != WEOF) {
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if (!Cflag || iswrune(ch))
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ch = cmap_lookup(map, ch);
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(void)putwchar(ch);
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}
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if (ferror(stdin))
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err(1, NULL);
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exit (0);
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}
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static struct cset *
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setup(char *arg, STR *str, int cflag, int Cflag)
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{
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struct cset *cs;
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cs = cset_alloc();
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if (cs == NULL)
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err(1, NULL);
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str->str = arg;
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while (next(str))
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cset_add(cs, str->lastch);
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if (Cflag)
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cset_addclass(cs, wctype("rune"), true);
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if (cflag || Cflag)
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cset_invert(cs);
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cset_cache(cs);
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return (cs);
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}
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int
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charcoll(const void *a, const void *b)
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{
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static char sa[2], sb[2];
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sa[0] = *(const int *)a;
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sb[0] = *(const int *)b;
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return (strcoll(sa, sb));
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
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"usage: tr [-Ccsu] string1 string2",
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" tr [-Ccu] -d string1",
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" tr [-Ccu] -s string1",
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" tr [-Ccu] -ds string1 string2");
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exit(1);
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}
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