157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini wc implementation for busybox
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*
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* Copyright (C) 2000 Edward Betts <edward@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <getopt.h>
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#include <string.h>
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#include <stdlib.h>
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#include "busybox.h"
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static int total_lines, total_words, total_chars, max_length;
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static int print_lines, print_words, print_chars, print_length;
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static void print_counts(int lines, int words, int chars, int length,
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const char *name)
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{
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char const *space = "";
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if (print_lines) {
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printf("%7d", lines);
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space = " ";
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}
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if (print_words) {
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printf("%s%7d", space, words);
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space = " ";
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}
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if (print_chars) {
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printf("%s%7d", space, chars);
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space = " ";
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}
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if (print_length)
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printf("%s%7d", space, length);
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if (*name)
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printf(" %s", name);
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putchar('\n');
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}
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static void wc_file(FILE * file, const char *name)
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{
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int lines, words, chars, length;
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int in_word = 0, linepos = 0;
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int c;
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lines = words = chars = length = 0;
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while ((c = getc(file)) != EOF) {
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chars++;
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switch (c) {
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case '\n':
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lines++;
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case '\r':
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case '\f':
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if (linepos > length)
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length = linepos;
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linepos = 0;
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goto word_separator;
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case '\t':
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linepos += 8 - (linepos % 8);
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goto word_separator;
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case ' ':
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linepos++;
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case '\v':
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word_separator:
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if (in_word) {
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in_word = 0;
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words++;
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}
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break;
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default:
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linepos++;
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in_word = 1;
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break;
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}
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}
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if (linepos > length)
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length = linepos;
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if (in_word)
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words++;
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print_counts(lines, words, chars, length, name);
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total_lines += lines;
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total_words += words;
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total_chars += chars;
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if (length > max_length)
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max_length = length;
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fclose(file);
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fflush(stdout);
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}
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int wc_main(int argc, char **argv)
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{
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FILE *file;
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unsigned int num_files_counted = 0;
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int opt, status = EXIT_SUCCESS;
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total_lines = total_words = total_chars = max_length = 0;
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print_lines = print_words = print_chars = print_length = 0;
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while ((opt = getopt(argc, argv, "clLw")) > 0) {
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switch (opt) {
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case 'c':
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print_chars = 1;
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break;
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case 'l':
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print_lines = 1;
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break;
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case 'L':
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print_length = 1;
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break;
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case 'w':
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print_words = 1;
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break;
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default:
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show_usage();
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}
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}
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if (!print_lines && !print_words && !print_chars && !print_length)
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print_lines = print_words = print_chars = 1;
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if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) {
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wc_file(stdin, "");
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return EXIT_SUCCESS;
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} else {
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while (optind < argc) {
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if ((file = wfopen(argv[optind], "r")) != NULL)
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wc_file(file, argv[optind]);
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else
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status = EXIT_FAILURE;
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num_files_counted++;
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optind++;
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}
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}
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if (num_files_counted > 1)
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print_counts(total_lines, total_words, total_chars,
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max_length, "total");
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return status;
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}
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