NetBSD-5.0.2/usr.bin/wc/wc.c
/* $NetBSD: wc.c,v 1.31 2008/07/21 14:19:28 lukem Exp $ */
/*
* Copyright (c) 1980, 1987, 1991, 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>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1991, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)wc.c 8.2 (Berkeley) 5/2/95";
#else
__RCSID("$NetBSD: wc.c,v 1.31 2008/07/21 14:19:28 lukem Exp $");
#endif
#endif /* not lint */
/* wc line, word and char count */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <err.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#ifdef NO_QUAD
typedef u_long wc_count_t;
# define WCFMT " %7lu"
# define WCCAST unsigned long
#else
typedef u_quad_t wc_count_t;
# define WCFMT " %7llu"
# define WCCAST unsigned long long
#endif
static wc_count_t tlinect, twordct, tcharct;
static int doline, doword, dobyte, dochar;
static int rval = 0;
static void cnt(char *);
static void print_counts(wc_count_t, wc_count_t, wc_count_t, char *);
static void usage(void);
static size_t do_mb(wchar_t *, const char *, size_t, mbstate_t *,
size_t *, const char *);
int main(int, char *[]);
int
main(int argc, char *argv[])
{
int ch;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "lwcm")) != -1)
switch (ch) {
case 'l':
doline = 1;
break;
case 'w':
doword = 1;
break;
case 'm':
dochar = 1;
dobyte = 0;
break;
case 'c':
dochar = 0;
dobyte = 1;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
/* Wc's flags are on by default. */
if (doline + doword + dobyte + dochar == 0)
doline = doword = dobyte = 1;
if (!*argv) {
cnt(NULL);
} else {
int dototal = (argc > 1);
do {
cnt(*argv);
} while(*++argv);
if (dototal)
print_counts(tlinect, twordct, tcharct, "total");
}
exit(rval);
}
static size_t
do_mb(wchar_t *wc, const char *p, size_t mblen, mbstate_t *st,
size_t *cnt, const char *file)
{
size_t r;
size_t c = 0;
do {
r = mbrtowc(wc, p, mblen, st);
if (r == (size_t)-1) {
warnx("%s: invalid byte sequence", file);
rval = 1;
/* XXX skip 1 byte */
mblen--;
p++;
memset(st, 0, sizeof(*st));
continue;
} else if (r == (size_t)-2)
break;
else if (r == 0)
r = 1;
c++;
if (wc)
wc++;
mblen -= r;
p += r;
} while (mblen > 0);
*cnt = c;
return (r);
}
static void
cnt(char *file)
{
u_char buf[MAXBSIZE];
wchar_t wbuf[MAXBSIZE];
struct stat sb;
wc_count_t charct, linect, wordct;
mbstate_t st;
u_char *C;
wchar_t *WC;
char *name; /* filename or <stdin> */
size_t r = 0;
int fd, gotsp, len = 0;
linect = wordct = charct = 0;
if (file) {
if ((fd = open(file, O_RDONLY, 0)) < 0) {
warn("%s", file);
rval = 1;
return;
}
name = file;
} else {
fd = STDIN_FILENO;
name = "<stdin>";
}
if (dochar || doword)
memset(&st, 0, sizeof(st));
if (!doword) {
/*
* line counting is split out because it's a lot
* faster to get lines than to get words, since
* the word count requires some logic.
*/
if (doline || dochar) {
while ((len = read(fd, buf, MAXBSIZE)) > 0) {
if (dochar) {
size_t wlen;
r = do_mb(0, (char *)buf, (size_t)len,
&st, &wlen, name);
charct += wlen;
} else if (dobyte)
charct += len;
if (doline)
for (C = buf; len--; ++C)
if (*C == '\n')
++linect;
}
}
/*
* if all we need is the number of characters and
* it's a directory or a regular or linked file, just
* stat the puppy. We avoid testing for it not being
* a special device in case someone adds a new type
* of inode.
*/
else if (dobyte) {
if (fstat(fd, &sb)) {
warn("%s", name);
rval = 1;
} else {
if (S_ISREG(sb.st_mode) ||
S_ISLNK(sb.st_mode) ||
S_ISDIR(sb.st_mode)) {
charct = sb.st_size;
} else {
while ((len =
read(fd, buf, MAXBSIZE)) > 0)
charct += len;
}
}
}
} else {
/* do it the hard way... */
gotsp = 1;
while ((len = read(fd, buf, MAXBSIZE)) > 0) {
size_t wlen;
r = do_mb(wbuf, (char *)buf, (size_t)len, &st, &wlen,
name);
if (dochar) {
charct += wlen;
} else if (dobyte)
charct += len;
for (WC = wbuf; wlen--; ++WC) {
if (iswspace(*WC)) {
gotsp = 1;
if (*WC == L'\n') {
++linect;
}
} else {
/*
* This line implements the POSIX
* spec, i.e. a word is a "maximal
* string of characters delimited by
* whitespace." Notice nothing was
* said about a character being
* printing or non-printing.
*/
if (gotsp) {
gotsp = 0;
++wordct;
}
}
}
}
}
if (len == -1) {
warn("%s", name);
rval = 1;
}
if (dochar && r == (size_t)-2) {
warnx("%s: incomplete multibyte character", name);
rval = 1;
}
print_counts(linect, wordct, charct, file);
/*
* don't bother checkint doline, doword, or dobyte --- speeds
* up the common case
*/
tlinect += linect;
twordct += wordct;
tcharct += charct;
if (close(fd)) {
warn("%s", name);
rval = 1;
}
}
static void
print_counts(wc_count_t lines, wc_count_t words, wc_count_t chars, char *name)
{
if (doline)
printf(WCFMT, (WCCAST)lines);
if (doword)
printf(WCFMT, (WCCAST)words);
if (dobyte || dochar)
printf(WCFMT, (WCCAST)chars);
if (name)
printf(" %s\n", name);
else
printf("\n");
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: wc [-c | -m] [-lw] [file ...]\n");
exit(1);
}