0
|
1 |
#include <stdio.h>
|
|
2 |
#include <stdlib.h>
|
|
3 |
|
|
4 |
|
|
5 |
#define MAXTABSTOPS 50
|
|
6 |
#define MAXLINECHARS 10000
|
|
7 |
|
|
8 |
|
|
9 |
void strpart(char * dest, const char *src, const int begin, const int end)
|
|
10 |
{
|
|
11 |
int i;
|
|
12 |
i=begin;
|
|
13 |
while (i<=end)
|
|
14 |
{
|
|
15 |
dest[i-begin] = src[i];
|
|
16 |
i++;
|
|
17 |
}
|
|
18 |
|
|
19 |
dest[i-begin] = '\0';
|
|
20 |
}
|
|
21 |
|
|
22 |
int main(int numarg, char **args)
|
|
23 |
{
|
|
24 |
int tabstops[MAXTABSTOPS+1];
|
|
25 |
int i,j;
|
|
26 |
char original[MAXLINECHARS];
|
|
27 |
char word[MAXLINECHARS];
|
|
28 |
int this_tab_stop;
|
|
29 |
int last_char;
|
|
30 |
int reverse=0; /* Funcionament normal */
|
|
31 |
int num_tab_stops;
|
|
32 |
int output_column;
|
|
33 |
|
|
34 |
|
|
35 |
if (numarg<2)
|
|
36 |
{
|
|
37 |
printf("Bad Usage.\n");
|
|
38 |
exit(1);
|
|
39 |
}
|
|
40 |
|
|
41 |
tabstops[0] = 0;
|
|
42 |
tabstops[numarg] = MAXLINECHARS;
|
|
43 |
num_tab_stops = 1;
|
|
44 |
|
|
45 |
for (i=1; i<numarg; i++)
|
|
46 |
{
|
|
47 |
if (args[i][0] == '-')
|
|
48 |
switch(args[i][1])
|
|
49 |
{
|
|
50 |
case 'r':
|
|
51 |
reverse=1;
|
|
52 |
}
|
|
53 |
else
|
|
54 |
tabstops[num_tab_stops++] = atoi(args[i])-1;
|
|
55 |
/* Usually columns start at '1' */
|
|
56 |
/* Not error-free in atoi! */
|
|
57 |
}
|
|
58 |
|
|
59 |
while(!feof(stdin))
|
|
60 |
{
|
|
61 |
fgets(original, MAXLINECHARS, stdin);
|
|
62 |
if (feof(stdin)) break;
|
|
63 |
|
|
64 |
if (reverse==0)
|
|
65 |
this_tab_stop=0;
|
|
66 |
else
|
|
67 |
this_tab_stop=1;
|
|
68 |
|
|
69 |
last_char=-1;
|
|
70 |
|
|
71 |
if(reverse==0)
|
|
72 |
{
|
|
73 |
for(i=0; i<strlen(original); i++)
|
|
74 |
{
|
|
75 |
if(i == tabstops[this_tab_stop+1])
|
|
76 |
{
|
|
77 |
strpart(word, original, tabstops[this_tab_stop], last_char);
|
|
78 |
printf("%s", word);
|
|
79 |
if(this_tab_stop != num_tab_stops) /* Ultim tab stop */
|
|
80 |
putchar('\t');
|
|
81 |
|
|
82 |
/* A pel proxim tab */
|
|
83 |
last_char = tabstops[++this_tab_stop]-1;
|
|
84 |
}
|
|
85 |
|
|
86 |
if(original[i] != ' ')
|
|
87 |
last_char = i;
|
|
88 |
}
|
|
89 |
/* Final de linia */
|
|
90 |
strpart(word, original, tabstops[this_tab_stop], last_char);
|
|
91 |
printf("%s", word);
|
|
92 |
}
|
|
93 |
else
|
|
94 |
{
|
|
95 |
this_tab_stop=1;
|
|
96 |
output_column=1;
|
|
97 |
for(i=0; i<strlen(original); i++)
|
|
98 |
{
|
|
99 |
if(original[i]=='\t' && this_tab_stop < num_tab_stops)
|
|
100 |
{
|
|
101 |
for(j=output_column; j<=tabstops[this_tab_stop]; j++)
|
|
102 |
{
|
|
103 |
putchar(' ');
|
|
104 |
}
|
|
105 |
output_column = tabstops[this_tab_stop];
|
|
106 |
this_tab_stop++;
|
|
107 |
}
|
|
108 |
else
|
|
109 |
putchar(original[i]);
|
|
110 |
|
|
111 |
output_column++;
|
|
112 |
}
|
|
113 |
}
|
|
114 |
|
|
115 |
}
|
|
116 |
|
|
117 |
exit(0);
|
|
118 |
}
|