1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
6 */
7 #ifndef INCLUDE_oid_h__
8 #define INCLUDE_oid_h__
9
10 #include "common.h"
11
12 #include "git2/oid.h"
13
14 /**
15 * Format a git_oid into a newly allocated c-string.
16 *
17 * The c-string is owned by the caller and needs to be manually freed.
18 *
19 * @param id the oid structure to format
20 * @return the c-string; NULL if memory is exhausted. Caller must
21 * deallocate the string with git__free().
22 */
23 char *git_oid_allocfmt(const git_oid *id);
24
git_oid__hashcmp(const unsigned char * sha1,const unsigned char * sha2)25 GIT_INLINE(int) git_oid__hashcmp(const unsigned char *sha1, const unsigned char *sha2)
26 {
27 return memcmp(sha1, sha2, GIT_OID_RAWSZ);
28 }
29
30 /*
31 * Compare two oid structures.
32 *
33 * @param a first oid structure.
34 * @param b second oid structure.
35 * @return <0, 0, >0 if a < b, a == b, a > b.
36 */
git_oid__cmp(const git_oid * a,const git_oid * b)37 GIT_INLINE(int) git_oid__cmp(const git_oid *a, const git_oid *b)
38 {
39 return git_oid__hashcmp(a->id, b->id);
40 }
41
git_oid__cpy_prefix(git_oid * out,const git_oid * id,size_t len)42 GIT_INLINE(void) git_oid__cpy_prefix(
43 git_oid *out, const git_oid *id, size_t len)
44 {
45 memcpy(&out->id, id->id, (len + 1) / 2);
46
47 if (len & 1)
48 out->id[len / 2] &= 0xF0;
49 }
50
51 #endif
52