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179 lines
3.7 KiB
C
179 lines
3.7 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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enum print_e {
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print_lines = 1,
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print_words = 2,
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print_chars = 4,
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print_length = 8
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};
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static unsigned int total_lines = 0;
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static unsigned int total_words = 0;
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static unsigned int total_chars = 0;
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static unsigned int max_length = 0;
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static char print_type = 0;
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static void print_counts(const unsigned int lines, const unsigned int words,
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const unsigned int chars, const unsigned int length, const char *name)
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{
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int output = 0;
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if (print_type & print_lines) {
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printf("%7d", lines);
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output++;
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}
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if (print_type & print_words) {
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if (output++)
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putchar(' ');
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printf("%7d", words);
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}
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if (print_type & print_chars) {
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if (output++)
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putchar(' ');
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printf("%7d", chars);
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}
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if (print_type & print_length) {
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if (output++)
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putchar(' ');
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printf("%7d", length);
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}
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if (*name) {
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printf(" %s", name);
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}
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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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unsigned int lines = 0;
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unsigned int words = 0;
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unsigned int chars = 0;
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unsigned int length = 0;
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unsigned int linepos = 0;
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char in_word = 0;
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int c;
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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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}
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if (in_word) {
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words++;
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}
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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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}
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}
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int wc_main(int argc, char **argv)
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{
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int opt;
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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_type |= print_chars;
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break;
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case 'l':
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print_type |= print_lines;
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break;
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case 'L':
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print_type |= print_length;
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break;
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case 'w':
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print_type |= print_words;
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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_type == 0) {
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print_type = print_lines | print_words | print_chars;
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}
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if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) {
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wc_file(stdin, "");
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} else {
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unsigned short num_files_counted = 0;
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while (optind < argc) {
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if (print_type == print_chars) {
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struct stat statbuf;
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stat(argv[optind], &statbuf);
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print_counts(0, 0, statbuf.st_size, 0, argv[optind]);
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total_chars += statbuf.st_size;
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} else {
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FILE *file;
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file = xfopen(argv[optind], "r");
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wc_file(file, argv[optind]);
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fclose(file);
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}
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optind++;
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num_files_counted++;
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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, max_length, "total");
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}
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}
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return(EXIT_SUCCESS);
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}
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