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/* wc - print the number of bytes, words, and lines in files
Copyright (C) 1985, 1991 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Paul Rubin, phr@ocf.berkeley.edu
and David MacKenzie, djm@gnu.ai.mit.edu. */
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include "system.h"
/* Size of atomic reads. */
#define BUFFER_SIZE (16 * 1024)
void error ();
void wc ();
void wc_file ();
void write_counts ();
/* Cumulative number of lines, words, and chars in all files so far. */
unsigned long total_lines, total_words, total_chars;
/* Which counts to print. */
int print_lines, print_words, print_chars;
/* Nonzero if we have ever read the standard input. */
int have_read_stdin;
/* The name this program was run with. */
char *program_name;
/* The error code to return to the system. */
int exit_status;
struct option longopts[] =
{
{"bytes", 0, NULL, 'c'},
{"chars", 0, NULL, 'c'},
{"lines", 0, NULL, 'l'},
{"words", 0, NULL, 'w'},
{NULL, 0, NULL, 0}
};
void
main (argc, argv)
int argc;
char **argv;
{
int optc;
int nfiles;
program_name = argv[0];
exit_status = 0;
print_lines = print_words = print_chars = 0;
total_lines = total_words = total_chars = 0;
while ((optc = getopt_long (argc, argv, "clw", longopts, (int *) 0)) != EOF)
switch (optc)
{
case 'c':
print_chars = 1;
break;
case 'l':
print_lines = 1;
break;
case 'w':
print_words = 1;
break;
default:
fprintf (stderr, "\
Usage: %s [-clw] [--bytes] [--chars] [--lines] [--words] [file...]\n", argv[0]);
exit (1);
}
if (print_lines + print_words + print_chars == 0)
print_lines = print_words = print_chars = 1;
nfiles = argc - optind;
if (nfiles == 0)
{
have_read_stdin = 1;
wc (0, "");
}
else
{
for (; optind < argc; ++optind)
wc_file (argv[optind]);
if (nfiles > 1)
write_counts (total_lines, total_words, total_chars, "total");
}
if (have_read_stdin && close (0))
error (1, errno, "-");
exit (exit_status);
}
void
wc_file (file)
char *file;
{
if (!strcmp (file, "-"))
{
have_read_stdin = 1;
wc (0, file);
}
else
{
int fd = open (file, O_RDONLY);
if (fd == -1)
{
error (0, errno, "%s", file);
exit_status = 1;
return;
}
wc (fd, file);
if (close (fd))
{
error (0, errno, "%s", file);
exit_status = 1;
}
}
}
void
wc (fd, file)
int fd;
char *file;
{
char buf[BUFFER_SIZE];
register int bytes_read;
register int in_word = 0;
register unsigned long lines, words, chars;
struct stat stats;
lines = words = chars = 0;
if (print_chars && !print_words && !print_lines
&& fstat (fd, &stats) == 0 && S_ISREG (stats.st_mode))
{
chars = stats.st_size;
}
else
{
while ((bytes_read = read (fd, buf, BUFFER_SIZE)) > 0)
{
register char *p = buf;
chars += bytes_read;
do
{
switch (*p++)
{
case '\n':
lines++;
/* Fall through. */
case '\r':
case '\f':
case '\t':
case '\v':
case ' ':
if (in_word)
{
in_word = 0;
words++;
}
break;
default:
in_word = 1;
break;
}
}
while (--bytes_read);
}
if (bytes_read < 0)
{
error (0, errno, "%s", file);
exit_status = 1;
}
if (in_word)
words++;
}
write_counts (lines, words, chars, file);
total_lines += lines;
total_words += words;
total_chars += chars;
}
void
write_counts (lc, wc, cc, file)
unsigned long lc, wc, cc;
char *file;
{
if (print_lines)
printf ("%7lu", lc);
if (print_words)
{
if (print_lines)
putchar (' ');
printf ("%7lu", wc);
}
if (print_chars)
{
if (print_lines || print_words)
putchar (' ');
printf ("%7lu", cc);
}
if (*file)
printf (" %s", file);
putchar ('\n');
}
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