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/*
* Mini wc implementation for busybox
*
* by Edward Betts <edward@debian.org>
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#include <stdio.h>
static const char wc_usage[] = "wc [OPTION]... [FILE]...\n\n"
"Print line, word, and byte counts for each FILE, and a total line if\n"
"more than one FILE is specified. With no FILE, read standard input.\n"
"\t-c\tprint the byte counts\n"
"\t-l\tprint the newline counts\n"
"\t-L\tprint the length of the longest line\n"
"\t-L\tprint the length of the longest line\n"
"\t-w\tprint the word counts\n";
static int total_lines, total_words, total_chars, max_length;
static int print_lines, print_words, print_chars, print_length;
void print_counts (int lines, int words, int chars, int length,
const char *name) {
char const *space = "";
if (print_lines) {
printf ("%7d", lines);
space = " ";
}
if (print_words) {
printf ("%s%7d", space, words);
space = " ";
}
if (print_chars) {
printf ("%s%7d", space, chars);
space = " ";
}
if (print_length)
printf ("%s%7d", space, length);
if (*name)
printf (" %s", name);
putchar ('\n');
}
static void wc_file(FILE *file, const char *name)
{
int lines, words, chars, length;
int in_word = 0, linepos = 0;
int c;
lines = words = chars = length = 0;
while ((c = getc(file)) != EOF) {
chars++;
switch (c) {
case '\n':
lines++;
case '\r':
case '\f':
if (linepos > length)
length = linepos;
linepos = 0;
goto word_separator;
case '\t':
linepos += 8 - (linepos % 8);
goto word_separator;
case ' ':
linepos++;
case '\v':
word_separator:
if (in_word) {
in_word = 0;
words++;
}
break;
default:
linepos++;
in_word = 1;
break;
}
}
if (linepos > length)
length = linepos;
if (in_word)
words++;
print_counts (lines, words, chars, length, name);
total_lines += lines;
total_words += words;
total_chars += chars;
if (length > max_length)
max_length = length;
fclose(file);
fflush(stdout);
}
int wc_main(int argc, char **argv) {
FILE *file;
total_lines = total_words = total_chars = max_length = 0;
print_lines = print_words = print_chars = print_length = 0;
while (--argc && **(++argv) == '-') {
while (*++(*argv))
switch (**argv) {
case 'c':
print_chars = 1;
break;
case 'l':
print_lines = 1;
break;
case 'L':
print_length = 1;
break;
case 'w':
print_words = 1;
break;
default:
usage (wc_usage);
}
}
if (!print_lines && !print_words && !print_chars && !print_length)
print_lines = print_words = print_chars = 1;
if (argc == 0) {
wc_file(stdin, "");
exit(TRUE);
}
else if (argc == 1) {
file = fopen(*argv, "r");
if (file == NULL) {
perror(*argv);
exit(FALSE);
}
wc_file(file, *argv);
}
else {
while (argc-- > 0 && *argv != '\0' && strlen(*argv)) {
file = fopen(*argv, "r");
if (file == NULL) {
perror(*argv);
exit(FALSE);
}
wc_file(file, *argv);
argv++;
}
print_counts (total_lines, total_words, total_chars,
max_length, "total");
}
exit(TRUE);
}
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