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
|
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#define DEFTAB 8
#define TRUE 1
#define FALSE 0
#define MAXSTOPS 100
int stops[MAXSTOPS];
void detab(int *stops, int limit);
void entab(int *stops, int limit);
int main(int argc, char **argv)
{
int entab_bool = FALSE;
int detab_bool = FALSE;
int stop_position = 0;
while (--argc > 0 && **++argv == '-') {
while (*++*argv) {
switch (**argv) {
case 'e' :
entab_bool = TRUE;
break;
case 'd' :
detab_bool = TRUE;
break;
case 's' :
if (*++*argv != '=')
break;
while (*++*argv && stop_position < MAXSTOPS) {
stops[stop_position++] = atoi(*argv);
printf("loooop -- %d\n", stop_position);
while (isdigit(**argv))
++*argv;
if (**argv == '\0')
--*argv;
}
break;
}
}
}
stops[stop_position] = DEFTAB;
if (entab_bool ^ detab_bool) {
if (entab_bool)
entab(stops, stop_position);
else if (detab_bool)
detab(stops, stop_position);
} else {
printf("usage: tab -[ed] -s=s1,s2,s3,...,s3\n");
}
return 0;
}
void detab(int *stops, int limit)
{
char input;
int space, count = 0, stop_position = 0;
while((input = getchar()) != EOF) {
switch (input) {
case '\t' :
for (space = count%stops[stop_position]; space <
stops[stop_position]; space++)
putchar(' ');
count = 0;
if (stop_position < limit)
stop_position++;
break;
case '\n' :
count = 0;
break;
default :
putchar(input);
count++;
break;
}
}
}
void entab(int *stops, int limit)
{
char input;
int spaces = 0, stop_position = 0, count = 0;
while((input = getchar()) != EOF) {
switch (input) {
case ' ' :
spaces++;
break;
case '\n' :
count = 0;
putchar('\n');
break;
default :
// add spaces misssed by the first tab
if (spaces >= stops[stop_position])
spaces += count%stops[stop_position];
while (spaces/stops[stop_position]) {
spaces = spaces - stops[stop_position];
putchar('\t');
if (stop_position < limit)
stop_position++;
}
while (spaces--)
putchar(' ');
spaces = 0;
count++;
putchar(input);
break;
}
}
}
|
