1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* 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\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-w\tprint the word counts\n";
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);
}
|
