fix openssl headers conflicting with custom SHA1 implementations
[git/git.git] / patch-id.c
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1#include "cache.h"
2
9126f009 3static void flush_current_id(int patchlen, unsigned char *id, git_SHA_CTX *c)
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4{
5 unsigned char result[20];
6 char name[50];
7
8 if (!patchlen)
9 return;
10
9126f009 11 git_SHA1_Final(result, c);
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12 memcpy(name, sha1_to_hex(id), 41);
13 printf("%s %s\n", sha1_to_hex(result), name);
9126f009 14 git_SHA1_Init(c);
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15}
16
17static 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
30static void generate_id_list(void)
31{
32 static unsigned char sha1[20];
33 static char line[1000];
9126f009 34 git_SHA_CTX ctx;
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35 int patchlen = 0;
36
9126f009 37 git_SHA1_Init(&ctx);
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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;
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45 else if (!memcmp(line, "commit ", 7))
46 p += 7;
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47
48 if (!get_sha1_hex(p, n)) {
49 flush_current_id(patchlen, sha1, &ctx);
e702496e 50 hashcpy(sha1, n);
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51 patchlen = 0;
52 continue;
53 }
54
55 /* Ignore commit comments */
56 if (!patchlen && memcmp(line, "diff ", 5))
57 continue;
58
9fabdedc
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59 /* Ignore git-diff index header */
60 if (!memcmp(line, "index ", 6))
61 continue;
62
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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;
9126f009 70 git_SHA1_Update(&ctx, line, len);
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71 }
72 flush_current_id(patchlen, sha1, &ctx);
73}
74
54c6870e 75static const char patch_id_usage[] = "git-patch-id < patch";
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76
77int main(int argc, char **argv)
78{
79 if (argc != 1)
80 usage(patch_id_usage);
81
82 generate_id_list();
83 return 0;
a6080a0a 84}