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f45dd01002
wc utility. The -L option can be used to report the length of the longest line wc has seen in one or more files. It is disabled by default, and wc uses the standard `-lwc'. Submitted by: Sheldon Givens, sheldon at sigsegv.ca Reviewed by: kib MFC after: 1 week
295 lines
6.7 KiB
C
295 lines
6.7 KiB
C
/*
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* Copyright (c) 1980, 1987, 1991, 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1987, 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)wc.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.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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uintmax_t tlinect, twordct, tcharct, tlongline;
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int doline, doword, dochar, domulti, dolongline;
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static int cnt(const char *);
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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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int ch, errors, total;
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(void) setlocale(LC_CTYPE, "");
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while ((ch = getopt(argc, argv, "clmwL")) != -1)
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switch((char)ch) {
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case 'l':
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doline = 1;
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break;
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case 'w':
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doword = 1;
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break;
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case 'c':
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dochar = 1;
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domulti = 0;
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break;
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case 'L':
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dolongline = 1;
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break;
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case 'm':
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domulti = 1;
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dochar = 0;
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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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argv += optind;
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argc -= optind;
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/* Wc's flags are on by default. */
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if (doline + doword + dochar + domulti + dolongline == 0)
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doline = doword = dochar = 1;
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errors = 0;
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total = 0;
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if (!*argv) {
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if (cnt((char *)NULL) != 0)
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++errors;
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else
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(void)printf("\n");
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}
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else do {
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if (cnt(*argv) != 0)
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++errors;
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else
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(void)printf(" %s\n", *argv);
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++total;
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} while(*++argv);
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if (total > 1) {
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if (doline)
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(void)printf(" %7ju", tlinect);
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if (doword)
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(void)printf(" %7ju", twordct);
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if (dochar || domulti)
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(void)printf(" %7ju", tcharct);
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if (dolongline)
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(void)printf(" %7ju", tlongline);
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(void)printf(" total\n");
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}
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exit(errors == 0 ? 0 : 1);
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}
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static int
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cnt(const char *file)
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{
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struct stat sb;
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uintmax_t linect, wordct, charct, llct, tmpll;
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int fd, len, warned;
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size_t clen;
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short gotsp;
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u_char *p;
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u_char buf[MAXBSIZE];
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wchar_t wch;
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mbstate_t mbs;
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linect = wordct = charct = llct = tmpll = 0;
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if (file == NULL) {
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file = "stdin";
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fd = STDIN_FILENO;
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} else {
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if ((fd = open(file, O_RDONLY, 0)) < 0) {
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warn("%s: open", file);
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return (1);
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}
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if (doword || (domulti && MB_CUR_MAX != 1))
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goto word;
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/*
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* Line counting is split out because it's a lot faster to get
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* lines than to get words, since the word count requires some
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* logic.
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*/
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if (doline) {
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while ((len = read(fd, buf, MAXBSIZE))) {
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if (len == -1) {
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warn("%s: read", file);
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(void)close(fd);
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return (1);
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}
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charct += len;
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for (p = buf; len--; ++p)
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if (*p == '\n') {
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if (tmpll > llct)
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llct = tmpll;
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tmpll = 0;
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++linect;
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} else
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tmpll++;
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}
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tlinect += linect;
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(void)printf(" %7ju", linect);
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if (dochar) {
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tcharct += charct;
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(void)printf(" %7ju", charct);
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}
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if (dolongline) {
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if (llct > tlongline)
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tlongline = llct;
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(void)printf(" %7ju", tlongline);
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}
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(void)close(fd);
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return (0);
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}
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/*
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* If all we need is the number of characters and it's a
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* regular file, just stat the puppy.
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*/
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if (dochar || domulti) {
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if (fstat(fd, &sb)) {
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warn("%s: fstat", file);
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(void)close(fd);
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return (1);
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}
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if (S_ISREG(sb.st_mode)) {
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(void)printf(" %7lld", (long long)sb.st_size);
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tcharct += sb.st_size;
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(void)close(fd);
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return (0);
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}
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}
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}
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/* Do it the hard way... */
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word: gotsp = 1;
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warned = 0;
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memset(&mbs, 0, sizeof(mbs));
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while ((len = read(fd, buf, MAXBSIZE)) != 0) {
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if (len == -1) {
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warn("%s: read", file);
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(void)close(fd);
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return (1);
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}
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p = buf;
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while (len > 0) {
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if (!domulti || MB_CUR_MAX == 1) {
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clen = 1;
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wch = (unsigned char)*p;
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} else if ((clen = mbrtowc(&wch, p, len, &mbs)) ==
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(size_t)-1) {
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if (!warned) {
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errno = EILSEQ;
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warn("%s", file);
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warned = 1;
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}
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memset(&mbs, 0, sizeof(mbs));
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clen = 1;
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wch = (unsigned char)*p;
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} else if (clen == (size_t)-2)
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break;
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else if (clen == 0)
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clen = 1;
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charct++;
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if (wch != L'\n')
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tmpll++;
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len -= clen;
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p += clen;
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if (wch == L'\n') {
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if (tmpll > llct)
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llct = tmpll;
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tmpll = 0;
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++linect;
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}
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if (iswspace(wch))
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gotsp = 1;
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else if (gotsp) {
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gotsp = 0;
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++wordct;
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}
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}
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}
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if (domulti && MB_CUR_MAX > 1)
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if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
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warn("%s", file);
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if (doline) {
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tlinect += linect;
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(void)printf(" %7ju", linect);
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}
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if (doword) {
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twordct += wordct;
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(void)printf(" %7ju", wordct);
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}
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if (dochar || domulti) {
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tcharct += charct;
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(void)printf(" %7ju", charct);
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}
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if (dolongline) {
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if (llct > tlongline)
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tlongline = llct;
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(void)printf(" %7ju", llct);
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}
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(void)close(fd);
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return (0);
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}
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static void
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usage()
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{
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(void)fprintf(stderr, "usage: wc [-Lclmw] [file ...]\n");
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exit(1);
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}
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