NetBSD/usr.bin/wc/wc.c

252 lines
6.0 KiB
C

/*
* Copyright (c) 1980, 1987 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.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1987 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)wc.c 5.7 (Berkeley) 3/2/91";
#endif /* not lint */
/* wc line, word and char count */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <stdio.h>
#define DEL 0177 /* del char */
#define NL 012 /* newline char */
#define SPACE 040 /* space char */
#define TAB 011 /* tab char */
static long tlinect, twordct, tcharct;
static int doline, doword, dochar;
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
register int ch;
int total;
/*
* wc is unusual in that its flags are on by default, so,
* if you don't get any arguments, you have to turn them
* all on.
*/
if (argc > 1 && argv[1][0] == '-' && argv[1][1]) {
while ((ch = getopt(argc, argv, "lwc")) != EOF)
switch((char)ch) {
case 'l':
doline = 1;
break;
case 'w':
doword = 1;
break;
case 'c':
dochar = 1;
break;
case '?':
default:
fputs("usage: wc [-lwc] [files]\n", stderr);
exit(1);
}
argv += optind;
argc -= optind;
}
else {
++argv;
--argc;
doline = doword = dochar = 1;
}
total = 0;
if (!*argv) {
cnt((char *)NULL);
putchar('\n');
}
else do {
cnt(*argv);
printf(" %s\n", *argv);
++total;
} while(*++argv);
if (total > 1) {
if (doline)
printf(" %7ld", tlinect);
if (doword)
printf(" %7ld", twordct);
if (dochar)
printf(" %7ld", tcharct);
puts(" total");
}
exit(0);
}
cnt(file)
char *file;
{
register u_char *C;
register short gotsp;
register int len;
register long linect, wordct, charct;
struct stat sbuf;
int fd;
u_char buf[MAXBSIZE];
linect = wordct = charct = 0;
if (file) {
if ((fd = open(file, O_RDONLY, 0)) < 0) {
perror(file);
exit(1);
}
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) {
while(len = read(fd, buf, MAXBSIZE)) {
if (len == -1) {
perror(file);
exit(1);
}
charct += len;
for (C = buf; len--; ++C)
if (*C == '\n')
++linect;
}
tlinect += linect;
printf(" %7ld", linect);
if (dochar) {
tcharct += charct;
printf(" %7ld", charct);
}
close(fd);
return;
}
/*
* 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.
*/
if (dochar) {
int ifmt;
if (fstat(fd, &sbuf)) {
perror(file);
exit(1);
}
ifmt = sbuf.st_mode & S_IFMT;
if (ifmt == S_IFREG || ifmt == S_IFLNK
|| ifmt == S_IFDIR) {
printf(" %7ld", sbuf.st_size);
tcharct += sbuf.st_size;
close(fd);
return;
}
}
}
}
else
fd = 0;
/* do it the hard way... */
for (gotsp = 1; len = read(fd, buf, MAXBSIZE);) {
if (len == -1) {
perror(file);
exit(1);
}
charct += len;
for (C = buf; len--; ++C)
switch(*C) {
case NL:
++linect;
case TAB:
case SPACE:
gotsp = 1;
continue;
default:
#ifdef notdef
/*
* This line of code implements the
* original V7 wc algorithm, i.e.
* a non-printing character doesn't
* toggle the "word" count, so that
* " ^D^F " counts as 6 spaces,
* while "foo^D^Fbar" counts as 8
* characters.
*
* test order is important -- gotsp
* will normally be NO, so test it
* first
*/
if (gotsp && *C > SPACE && *C < DEL) {
#endif
/*
* This line implements the manual
* page, i.e. a word is a "maximal
* string of characters delimited by
* spaces, tabs or newlines." Notice
* nothing was said about a character
* being printing or non-printing.
*/
if (gotsp) {
gotsp = 0;
++wordct;
}
}
}
if (doline) {
tlinect += linect;
printf(" %7ld", linect);
}
if (doword) {
twordct += wordct;
printf(" %7ld", wordct);
}
if (dochar) {
tcharct += charct;
printf(" %7ld", charct);
}
close(fd);
}