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
|
#include <assert.h>
#include <ctype.h>
#include <getopt.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "util/versie.h"
#include "util/error.h"
#include "util/debug.h"
#include "util/map.h"
static void usage(FILE *f) {
fprintf(f,
"Gebruik: toilet [-nchV] [BESTAND]...\n"
"\n"
"Toon de hoevelheeid regels, woorden en beten for elk BESTAND\n"
"\n"
" -c Geef het aantal beten weer\n"
" -w Geef het aantal woorden weer\n"
" -l Geef het aantal regels weer\n"
" -h Toon deze hulptekst\n"
" -V Toon versienummer\n");
}
enum MODE {
M_BYTES,
M_WORDS,
M_LINES,
};
// Returns pointer to argument array containing the file names
static char** parse_options(int argc, char **argv, enum MODE *mode) {
int opt;
while ((opt = getopt(argc, argv, "cwlhV")) != -1) {
switch (opt) {
case 'c':
*mode = M_BYTES;
break;
case 'w':
*mode = M_WORDS;
break;
case 'l':
*mode = M_LINES;
break;
case 'h':
usage(stdout);
exit(0);
case 'V':
drukkedoos_print_versie(stdout, "toilet");
exit(0);
case '?':
usage(stderr);
exit(1);
}
}
return argv + optind;
}
size_t get_count(enum MODE mode, struct map *map) {
switch (mode) {
case M_BYTES:
return map->sb.st_size;
case M_WORDS: {
size_t words = 0;
assert(map->sb.st_size >= 0);
// (c) Tom Forging
for (size_t i = 0; i < (size_t)map->sb.st_size;) {
size_t previ = i;
while (!isspace(map->addr[i])) i++;
words += i != previ;
while (isspace(map->addr[i])) i++;
}
return words;
}
case M_LINES: {
size_t lines = 0;
while (map->addr != map->end) {
if (*map->addr == '\n') lines++;
map->addr++;
}
// handle case if file does not have trailing newline
if (*(map->addr - 1) != '\n') {
lines++;
}
return lines;
}
}
}
int entry_toilet(int argc, char **argv) {
enum MODE mode;
char **args = parse_options(argc, argv, &mode);
while (*args != NULL) {
struct map *map = open_map(*args);
if (map == NULL) {
fprintf(stderr, "toilet: fout bij lezen bestand");
return 1;
}
size_t count = get_count(mode, map);
printf("%li %s\n", count, *args);
close_map(map);
args++;
}
return 0;
}
|
