blob: dee1ef06edae928c6103fea6b21812de22140a6e (
plain)
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
|
#include <stdio.h>
#include <string.h>
#include <ctype.h>
/*
* Remove empty lines from the beginning and end.
*
* Turn multiple consecutive empty lines into just one
* empty line. Return true if it is an incomplete line.
*/
static int cleanup(char *line)
{
int len = strlen(line);
if (len > 1 && line[len-1] == '\n') {
do {
unsigned char c = line[len-2];
if (!isspace(c))
break;
line[len-2] = '\n';
len--;
line[len] = 0;
} while (len > 1);
return 0;
}
return 1;
}
int main(int argc, char **argv)
{
int empties = -1;
int incomplete = 0;
char line[1024];
while (fgets(line, sizeof(line), stdin)) {
incomplete = cleanup(line);
/* Not just an empty line? */
if (line[0] != '\n') {
if (empties > 0)
putchar('\n');
empties = 0;
fputs(line, stdout);
continue;
}
if (empties < 0)
continue;
empties++;
}
if (incomplete)
putchar('\n');
return 0;
}
|
