]>
Commit | Line | Data |
---|---|---|
7499c996 | 1 | #include "builtin.h" |
9690c118 | 2 | #include "cache.h" |
a3e870f2 LT |
3 | |
4 | /* | |
975e0daf | 5 | * Returns the length of a line, without trailing spaces. |
a3e870f2 | 6 | * |
9690c118 | 7 | * If the line ends with newline, it will be removed too. |
a3e870f2 | 8 | */ |
975e0daf | 9 | static size_t cleanup(char *line, size_t len) |
a3e870f2 | 10 | { |
6d69b6f6 KH |
11 | while (len) { |
12 | unsigned char c = line[len - 1]; | |
13 | if (!isspace(c)) | |
14 | break; | |
15 | len--; | |
a3e870f2 | 16 | } |
6d69b6f6 | 17 | |
9690c118 | 18 | return len; |
a3e870f2 LT |
19 | } |
20 | ||
9690c118 CR |
21 | /* |
22 | * Remove empty lines from the beginning and end | |
23 | * and also trailing spaces from every line. | |
24 | * | |
25 | * Turn multiple consecutive empty lines between paragraphs | |
26 | * into just one empty line. | |
27 | * | |
28 | * If the input has only empty lines and spaces, | |
29 | * no output will be produced. | |
30 | * | |
6d69b6f6 | 31 | * If last line does not have a newline at the end, one is added. |
975e0daf | 32 | * |
9690c118 CR |
33 | * Enable skip_comments to skip every line starting with "#". |
34 | */ | |
6d69b6f6 | 35 | void stripspace(struct strbuf *sb, int skip_comments) |
a3e870f2 | 36 | { |
6d69b6f6 | 37 | int empties = 0; |
975e0daf CR |
38 | size_t i, j, len, newlen; |
39 | char *eol; | |
9690c118 | 40 | |
6d69b6f6 KH |
41 | /* We may have to add a newline. */ |
42 | strbuf_grow(sb, 1); | |
a3e870f2 | 43 | |
6d69b6f6 KH |
44 | for (i = j = 0; i < sb->len; i += len, j += newlen) { |
45 | eol = memchr(sb->buf + i, '\n', sb->len - i); | |
46 | len = eol ? eol - (sb->buf + i) + 1 : sb->len - i; | |
47 | ||
48 | if (skip_comments && len && sb->buf[i] == '#') { | |
975e0daf | 49 | newlen = 0; |
9690c118 | 50 | continue; |
975e0daf | 51 | } |
6d69b6f6 | 52 | newlen = cleanup(sb->buf + i, len); |
a3e870f2 LT |
53 | |
54 | /* Not just an empty line? */ | |
975e0daf | 55 | if (newlen) { |
6d69b6f6 KH |
56 | if (empties > 0 && j > 0) |
57 | sb->buf[j++] = '\n'; | |
a3e870f2 | 58 | empties = 0; |
6d69b6f6 KH |
59 | memmove(sb->buf + j, sb->buf + i, newlen); |
60 | sb->buf[newlen + j++] = '\n'; | |
61 | } else { | |
62 | empties++; | |
a3e870f2 | 63 | } |
a3e870f2 | 64 | } |
975e0daf | 65 | |
6d69b6f6 | 66 | strbuf_setlen(sb, j); |
7499c996 LS |
67 | } |
68 | ||
a633fca0 | 69 | int cmd_stripspace(int argc, const char **argv, const char *prefix) |
7499c996 | 70 | { |
f285a2d7 | 71 | struct strbuf buf = STRBUF_INIT; |
f653aee5 JS |
72 | int strip_comments = 0; |
73 | ||
4751f112 | 74 | if (argc == 2 && (!strcmp(argv[1], "-s") || |
f653aee5 JS |
75 | !strcmp(argv[1], "--strip-comments"))) |
76 | strip_comments = 1; | |
4751f112 | 77 | else if (argc > 1) |
497215d8 | 78 | usage("git stripspace [-s | --strip-comments] < input"); |
975e0daf | 79 | |
fd17f5b5 | 80 | if (strbuf_read(&buf, 0, 1024) < 0) |
0721c314 | 81 | die_errno("could not read the input"); |
975e0daf | 82 | |
6d69b6f6 | 83 | stripspace(&buf, strip_comments); |
975e0daf | 84 | |
fd17f5b5 PH |
85 | write_or_die(1, buf.buf, buf.len); |
86 | strbuf_release(&buf); | |
a3e870f2 LT |
87 | return 0; |
88 | } |