fix openssl headers conflicting with custom SHA1 implementations
[git/git.git] / patch-id.c
1 #include "cache.h"
2
3 static void flush_current_id(int patchlen, unsigned char *id, git_SHA_CTX *c)
4 {
5 unsigned char result[20];
6 char name[50];
7
8 if (!patchlen)
9 return;
10
11 git_SHA1_Final(result, c);
12 memcpy(name, sha1_to_hex(id), 41);
13 printf("%s %s\n", sha1_to_hex(result), name);
14 git_SHA1_Init(c);
15 }
16
17 static int remove_space(char *line)
18 {
19 char *src = line;
20 char *dst = line;
21 unsigned char c;
22
23 while ((c = *src++) != '\0') {
24 if (!isspace(c))
25 *dst++ = c;
26 }
27 return dst - line;
28 }
29
30 static void generate_id_list(void)
31 {
32 static unsigned char sha1[20];
33 static char line[1000];
34 git_SHA_CTX ctx;
35 int patchlen = 0;
36
37 git_SHA1_Init(&ctx);
38 while (fgets(line, sizeof(line), stdin) != NULL) {
39 unsigned char n[20];
40 char *p = line;
41 int len;
42
43 if (!memcmp(line, "diff-tree ", 10))
44 p += 10;
45 else if (!memcmp(line, "commit ", 7))
46 p += 7;
47
48 if (!get_sha1_hex(p, n)) {
49 flush_current_id(patchlen, sha1, &ctx);
50 hashcpy(sha1, n);
51 patchlen = 0;
52 continue;
53 }
54
55 /* Ignore commit comments */
56 if (!patchlen && memcmp(line, "diff ", 5))
57 continue;
58
59 /* Ignore git-diff index header */
60 if (!memcmp(line, "index ", 6))
61 continue;
62
63 /* Ignore line numbers when computing the SHA1 of the patch */
64 if (!memcmp(line, "@@ -", 4))
65 continue;
66
67 /* Compute the sha without whitespace */
68 len = remove_space(line);
69 patchlen += len;
70 git_SHA1_Update(&ctx, line, len);
71 }
72 flush_current_id(patchlen, sha1, &ctx);
73 }
74
75 static const char patch_id_usage[] = "git-patch-id < patch";
76
77 int main(int argc, char **argv)
78 {
79 if (argc != 1)
80 usage(patch_id_usage);
81
82 generate_id_list();
83 return 0;
84 }