checksum.h revision 299742 
1/*
2 * checksum.h: Converting and comparing checksums
3 *
4 * ====================================================================
5 *    Licensed to the Apache Software Foundation (ASF) under one
6 *    or more contributor license agreements.  See the NOTICE file
7 *    distributed with this work for additional information
8 *    regarding copyright ownership.  The ASF licenses this file
9 *    to you under the Apache License, Version 2.0 (the
10 *    "License"); you may not use this file except in compliance
11 *    with the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 *    Unless required by applicable law or agreed to in writing,
16 *    software distributed under the License is distributed on an
17 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 *    KIND, either express or implied.  See the License for the
19 *    specific language governing permissions and limitations
20 *    under the License.
21 * ====================================================================
22 */
23
24#ifndef SVN_LIBSVN_SUBR_CHECKSUM_H
25#define SVN_LIBSVN_SUBR_CHECKSUM_H
26
27#include <apr_pools.h>
28
29#include "svn_checksum.h"
30
31#ifdef __cplusplus
32extern "C" {
33#endif /* __cplusplus */
34
35
36
37/* The digest of the given KIND for the empty string. */
38const unsigned char *
39svn__empty_string_digest(svn_checksum_kind_t kind);
40
41
42/* Return the hex representation of DIGEST, which must be
43 * DIGEST_SIZE bytes long, allocating the string in POOL.
44 */
45const char *
46svn__digest_to_cstring_display(const unsigned char digest[],
47                               apr_size_t digest_size,
48                               apr_pool_t *pool);
49
50
51/* Return the hex representation of DIGEST, which must be
52 * DIGEST_SIZE bytes long, allocating the string in POOL.
53 * If DIGEST is all zeros, then return NULL.
54 */
55const char *
56svn__digest_to_cstring(const unsigned char digest[],
57                       apr_size_t digest_size,
58                       apr_pool_t *pool);
59
60
61/* Compare digests D1 and D2, each DIGEST_SIZE bytes long.
62 * If neither is all zeros, and they do not match, then return FALSE;
63 * else return TRUE.
64 */
65svn_boolean_t
66svn__digests_match(const unsigned char d1[],
67                   const unsigned char d2[],
68                   apr_size_t digest_size);
69
70#ifdef __cplusplus
71}
72#endif /* __cplusplus */
73
74#endif /* SVN_LIBSVN_SUBR_CHECKSUM_H */
75