Add [verse] to the SYNOPSIS section of git-submodule.txt.
[git/gitweb.git] / builtin-stripspace.c
blobd8358e28f01e2ed74a847767f52d90d84feb25ee
1 #include "builtin.h"
2 #include "cache.h"
4 /*
5 * Remove trailing spaces from a line.
7 * If the line ends with newline, it will be removed too.
8 * Returns the new length of the string.
9 */
10 static int cleanup(char *line, int len)
12 if (len) {
13 if (line[len - 1] == '\n')
14 len--;
16 while (len) {
17 unsigned char c = line[len - 1];
18 if (!isspace(c))
19 break;
20 len--;
22 line[len] = 0;
24 return len;
28 * Remove empty lines from the beginning and end
29 * and also trailing spaces from every line.
31 * Turn multiple consecutive empty lines between paragraphs
32 * into just one empty line.
34 * If the input has only empty lines and spaces,
35 * no output will be produced.
37 * Enable skip_comments to skip every line starting with "#".
39 void stripspace(FILE *in, FILE *out, int skip_comments)
41 int empties = -1;
42 int alloc = 1024;
43 char *line = xmalloc(alloc);
45 while (fgets(line, alloc, in)) {
46 int len = strlen(line);
48 while (len == alloc - 1 && line[len - 1] != '\n') {
49 alloc = alloc_nr(alloc);
50 line = xrealloc(line, alloc);
51 fgets(line + len, alloc - len, in);
52 len += strlen(line + len);
55 if (skip_comments && line[0] == '#')
56 continue;
57 len = cleanup(line, len);
59 /* Not just an empty line? */
60 if (len) {
61 if (empties > 0)
62 fputc('\n', out);
63 empties = 0;
64 fputs(line, out);
65 fputc('\n', out);
66 continue;
68 if (empties < 0)
69 continue;
70 empties++;
72 free(line);
75 int cmd_stripspace(int argc, const char **argv, const char *prefix)
77 stripspace(stdin, stdout, 0);
78 return 0;