diff options
Diffstat (limited to 'wc.c')
| -rw-r--r-- | wc.c | 169 |
1 files changed, 169 insertions, 0 deletions
@@ -0,0 +1,169 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini wc implementation for busybox + * + * Copyright (C) 2000 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 <stdio.h> +#include <getopt.h> +#include <string.h> +#include <stdlib.h> +#include "busybox.h" + +enum print_e { + print_lines = 1, + print_words = 2, + print_chars = 4, + print_length = 8 +}; + +static unsigned int total_lines = 0; +static unsigned int total_words = 0; +static unsigned int total_chars = 0; +static unsigned int max_length = 0; +static char print_type = 0; + +static void print_counts(const unsigned int lines, const unsigned int words, + const unsigned int chars, const unsigned int length, const char *name) +{ + if (print_type & print_lines) { + printf("%7d ", lines); + } + if (print_type & print_words) { + printf("%7d ", words); + } + if (print_type & print_chars) { + printf("%7d ", chars); + } + if (print_type & print_length) { + printf("%7d ", length); + } + if (*name) { + printf("%s", name); + } + putchar('\n'); +} + +static void wc_file(FILE * file, const char *name) +{ + unsigned int lines = 0; + unsigned int words = 0; + unsigned int chars = 0; + unsigned int length = 0; + unsigned int linepos = 0; + char in_word = 0; + int c; + + 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; + } +} + +int wc_main(int argc, char **argv) +{ + int opt; + + while ((opt = getopt(argc, argv, "clLw")) > 0) { + switch (opt) { + case 'c': + print_type |= print_chars; + break; + case 'l': + print_type |= print_lines; + break; + case 'L': + print_type |= print_length; + break; + case 'w': + print_type |= print_words; + break; + default: + show_usage(); + } + } + + if (print_type == 0) { + print_type = print_lines | print_words | print_chars; + } + + if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) { + wc_file(stdin, ""); + } else { + unsigned short num_files_counted = 0; + while (optind < argc) { + if (print_type == print_chars) { + struct stat statbuf; + stat(argv[optind], &statbuf); + print_counts(0, 0, statbuf.st_size, 0, argv[optind]); + total_chars += statbuf.st_size; + } else { + FILE *file; + file = xfopen(argv[optind], "r"); + wc_file(file, argv[optind]); + fclose(file); + } + optind++; + num_files_counted++; + } + if (num_files_counted > 1) { + print_counts(total_lines, total_words, total_chars, max_length, "total"); + } + } + + return(EXIT_SUCCESS); +} |