+/* vi: set sw=4 ts=4: */
/*
* Mini wc implementation for busybox
*
- * by Edward Betts <edward@debian.org>
+ * 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
*
*/
-#include "internal.h"
#include <stdio.h>
+#include <getopt.h>
+#include <string.h>
+#include <stdlib.h>
+#include "busybox.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";
+enum print_e {
+ print_lines = 1,
+ print_words = 2,
+ print_chars = 4,
+ print_length = 8
+};
-static int total_lines, total_words, total_chars, max_length;
-static int print_lines, print_words, print_chars, print_length;
+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;
-void print_counts (int lines, int words, int chars, int length,
- const char *name) {
- char const *space = "";
- if (print_lines) {
- printf ("%7d", lines);
- space = " ";
+static void print_counts(const unsigned int lines, const unsigned int words,
+ const unsigned int chars, const unsigned int length, const char *name)
+{
+ int output = 0;
+
+ if (print_type & print_lines) {
+ printf("%7d", lines);
+ output++;
+ }
+ if (print_type & print_words) {
+ if (output++)
+ putchar(' ');
+ printf("%7d", words);
+ }
+ if (print_type & print_chars) {
+ if (output++)
+ putchar(' ');
+ printf("%7d", chars);
}
- if (print_words) {
- printf ("%s%7d", space, words);
- space = " ";
+ if (print_type & print_length) {
+ if (output++)
+ putchar(' ');
+ printf("%7d", length);
}
- if (print_chars) {
- printf ("%s%7d", space, chars);
- space = " ";
+ if (*name) {
+ printf(" %s", name);
}
- if (print_length)
- printf ("%s%7d", space, length);
- if (*name)
- printf (" %s", name);
- putchar ('\n');
+ putchar('\n');
}
-static void wc_file(FILE *file, const char *name)
+static void wc_file(FILE * file, const char *name)
{
- int lines, words, chars, length;
- int in_word = 0, linepos = 0;
+ 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;
- 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;
+ 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)
+ if (linepos > length) {
length = linepos;
- if (in_word)
+ }
+ if (in_word) {
words++;
- print_counts (lines, words, chars, length, name);
+ }
+ print_counts(lines, words, chars, length, name);
total_lines += lines;
total_words += words;
total_chars += chars;
- if (length > max_length)
+ 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;
+int wc_main(int argc, char **argv)
+{
+ int opt;
- 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);
- }
+ 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_lines && !print_words && !print_chars && !print_length)
- print_lines = print_words = print_chars = 1;
+ if (print_type == 0) {
+ print_type = print_lines | print_words | print_chars;
+ }
- if (argc == 0) {
+ if (argv[optind] == NULL || strcmp(argv[optind], "-") == 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);
+ } 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);
}
- wc_file(file, *argv);
- argv++;
+ optind++;
+ num_files_counted++;
+ }
+ if (num_files_counted > 1) {
+ print_counts(total_lines, total_words, total_chars, max_length, "total");
}
- print_counts (total_lines, total_words, total_chars,
- max_length, "total");
}
- exit(TRUE);
+
+ return(EXIT_SUCCESS);
}
projects / oweals / busybox.git / blobdiff