Document the use of "current directory" as pull source.
[git] / stripspace.c
1 #include <stdio.h>
2 #include <string.h>
3 #include <ctype.h>
4
5 /*
6  * Remove empty lines from the beginning and end.
7  *
8  * Turn multiple consecutive empty lines into just one
9  * empty line.
10  */
11 static void cleanup(char *line)
12 {
13         int len = strlen(line);
14
15         if (len > 1 && line[len-1] == '\n') {
16                 do {
17                         unsigned char c = line[len-2];
18                         if (!isspace(c))
19                                 break;
20                         line[len-2] = '\n';
21                         len--;
22                         line[len] = 0;
23                 } while (len > 1);
24         }
25 }
26
27 int main(int argc, char **argv)
28 {
29         int empties = -1;
30         char line[1024];
31
32         while (fgets(line, sizeof(line), stdin)) {
33                 cleanup(line);
34
35                 /* Not just an empty line? */
36                 if (line[0] != '\n') {
37                         if (empties > 0)
38                                 putchar('\n');
39                         empties = 0;
40                         fputs(line, stdout);
41                         continue;
42                 }
43                 if (empties < 0)
44                         continue;
45                 empties++;
46         }
47         return 0;
48 }