/* vi: set sw=4 ts=4: */ /* * 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" #ifndef BB_FEATURE_TRIVIAL_HELP "\nPrint 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\n" "Options:\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-w\tprint the word counts\n" #endif ; 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); }